+++ /dev/null
-if USB_GADGET
-
-config USB_G_CCG
- tristate "Configurable Composite Gadget (STAGING)"
- depends on STAGING && BLOCK && NET && !USB_ZERO && !USB_ZERO_HNPTEST && !USB_AUDIO && !GADGET_UAC1 && !USB_ETH && !USB_ETH_RNDIS && !USB_ETH_EEM && !USB_G_NCM && !USB_GADGETFS && !USB_FUNCTIONFS && !USB_FUNCTIONFS_ETH && !USB_FUNCTIONFS_RNDIS && !USB_FUNCTIONFS_GENERIC && !USB_FILE_STORAGE && !USB_FILE_STORAGE_TEST && !USB_MASS_STORAGE && !USB_G_SERIAL && !USB_MIDI_GADGET && !USB_G_PRINTER && !USB_CDC_COMPOSITE && !USB_G_NOKIA && !USB_G_ACM_MS && !USB_G_MULTI && !USB_G_MULTI_RNDIS && !USB_G_MULTI_CDC && !USB_G_HID && !USB_G_DBGP && !USB_G_WEBCAM && TTY
- help
- The Configurable Composite Gadget supports multiple USB
- functions: acm, mass storage, rndis and FunctionFS.
- Each function can be configured and enabled/disabled
- dynamically from userspace through a sysfs interface.
-
- In order to compile this (either as a module or built-in),
- "USB Gadget Drivers" and anything under it must not be
- selected compiled-in in
- Device Drivers->USB Support->USB Gadget Support.
- However, you can say "M" there, if you do, the
- Configurable Composite Gadget can be compiled "M" only
- or not at all.
-
- BIG FAT NOTE: DON'T RELY ON THIS USERINTERFACE HERE! AS PART
- OF THE REWORK DONE HERE WILL BE A NEW USER INTERFACE WITHOUT ANY
- COMPATIBILITY TO THIS SYSFS INTERFACE HERE. BE AWARE OF THIS
- BEFORE SELECTING THIS.
-
-endif # USB_GADGET
+++ /dev/null
-g_ccg-y := ccg.o
-obj-$(CONFIG_USB_G_CCG) += g_ccg.o
+++ /dev/null
-TODO:
- - change configuration interface from sysfs to configfs
-
-Please send patches to Greg Kroah-Hartmann <gregkh@linuxfoundation.org>,
-Andrzej Pietrasiewicz <andrzej.p@samsung.com>, and
-Cc: Mike Lockwood <lockwood@android.com>
+++ /dev/null
-/*
- * Configurable Composite Gadget
- *
- * Initially contributed as "Android Composite Gdaget" by:
- *
- * Copyright (C) 2008 Google, Inc.
- * Author: Mike Lockwood <lockwood@android.com>
- * Benoit Goby <benoit@android.com>
- *
- * Tailoring it to become a generic Configurable Composite Gadget is
- *
- * Copyright (C) 2012 Samsung Electronics
- * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/utsname.h>
-#include <linux/platform_device.h>
-
-#include <linux/usb/ch9.h>
-#include "composite.h"
-#include <linux/usb/gadget.h>
-
-#include "gadget_chips.h"
-
-/*
- * Kbuild is not very cooperative with respect to linking separately
- * compiled library objects into one module. So for now we won't use
- * separate compilation ... ensuring init/exit sections work to shrink
- * the runtime footprint, and giving us at least some parts of what
- * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
- */
-#include "usbstring.c"
-#include "config.c"
-#include "epautoconf.c"
-#include "composite.c"
-
-#include "f_mass_storage.c"
-#include "u_serial.c"
-#include "f_acm.c"
-#define USB_ETH_RNDIS y
-#include "f_rndis.c"
-#include "rndis.c"
-#include "u_ether.c"
-#include "f_fs.c"
-
-MODULE_AUTHOR("Mike Lockwood, Andrzej Pietrasiewicz");
-MODULE_DESCRIPTION("Configurable Composite USB Gadget");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.0");
-
-static const char longname[] = "Configurable Composite Gadget";
-
-/* Default vendor and product IDs, overridden by userspace */
-#define VENDOR_ID 0x1d6b /* Linux Foundation */
-#define PRODUCT_ID 0x0107
-#define GFS_MAX_DEVS 10
-
-struct ccg_usb_function {
- char *name;
- void *config;
-
- struct device *dev;
- char *dev_name;
- struct device_attribute **attributes;
-
- /* for ccg_dev.enabled_functions */
- struct list_head enabled_list;
-
- /* Optional: initialization during gadget bind */
- int (*init)(struct ccg_usb_function *, struct usb_composite_dev *);
- /* Optional: cleanup during gadget unbind */
- void (*cleanup)(struct ccg_usb_function *);
-
- int (*bind_config)(struct ccg_usb_function *,
- struct usb_configuration *);
-
- /* Optional: called when the configuration is removed */
- void (*unbind_config)(struct ccg_usb_function *,
- struct usb_configuration *);
- /* Optional: handle ctrl requests before the device is configured */
- int (*ctrlrequest)(struct ccg_usb_function *,
- struct usb_composite_dev *,
- const struct usb_ctrlrequest *);
-};
-
-struct ffs_obj {
- const char *name;
- bool mounted;
- bool desc_ready;
- bool used;
- struct ffs_data *ffs_data;
-};
-
-struct ccg_dev {
- struct ccg_usb_function **functions;
- struct list_head enabled_functions;
- struct usb_composite_dev *cdev;
- struct device *dev;
-
- bool enabled;
- struct mutex mutex;
- bool connected;
- bool sw_connected;
- struct work_struct work;
-
- unsigned int max_func_num;
- unsigned int func_num;
- struct ffs_obj ffs_tab[GFS_MAX_DEVS];
-};
-
-static struct class *ccg_class;
-static struct ccg_dev *_ccg_dev;
-static int ccg_bind_config(struct usb_configuration *c);
-static void ccg_unbind_config(struct usb_configuration *c);
-
-static char func_names_buf[256];
-
-static struct usb_device_descriptor device_desc = {
- .bLength = sizeof(device_desc),
- .bDescriptorType = USB_DT_DEVICE,
- .bcdUSB = __constant_cpu_to_le16(0x0200),
- .bDeviceClass = USB_CLASS_PER_INTERFACE,
- .idVendor = __constant_cpu_to_le16(VENDOR_ID),
- .idProduct = __constant_cpu_to_le16(PRODUCT_ID),
- .bcdDevice = __constant_cpu_to_le16(0xffff),
- .bNumConfigurations = 1,
-};
-
-static struct usb_configuration ccg_config_driver = {
- .label = "ccg",
- .unbind = ccg_unbind_config,
- .bConfigurationValue = 1,
- .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
- .bMaxPower = 0xFA, /* 500ma */
-};
-
-static void ccg_work(struct work_struct *data)
-{
- struct ccg_dev *dev = container_of(data, struct ccg_dev, work);
- struct usb_composite_dev *cdev = dev->cdev;
- static char *disconnected[2] = { "USB_STATE=DISCONNECTED", NULL };
- static char *connected[2] = { "USB_STATE=CONNECTED", NULL };
- static char *configured[2] = { "USB_STATE=CONFIGURED", NULL };
- char **uevent_envp = NULL;
- unsigned long flags;
-
- spin_lock_irqsave(&cdev->lock, flags);
- if (cdev->config)
- uevent_envp = configured;
- else if (dev->connected != dev->sw_connected)
- uevent_envp = dev->connected ? connected : disconnected;
- dev->sw_connected = dev->connected;
- spin_unlock_irqrestore(&cdev->lock, flags);
-
- if (uevent_envp) {
- kobject_uevent_env(&dev->dev->kobj, KOBJ_CHANGE, uevent_envp);
- pr_info("%s: sent uevent %s\n", __func__, uevent_envp[0]);
- } else {
- pr_info("%s: did not send uevent (%d %d %p)\n", __func__,
- dev->connected, dev->sw_connected, cdev->config);
- }
-}
-
-
-/*-------------------------------------------------------------------------*/
-/* Supported functions initialization */
-
-static struct ffs_obj *functionfs_find_dev(struct ccg_dev *dev,
- const char *dev_name)
-{
- int i;
-
- for (i = 0; i < dev->max_func_num; i++)
- if (strcmp(dev->ffs_tab[i].name, dev_name) == 0)
- return &dev->ffs_tab[i];
-
- return NULL;
-}
-
-static bool functionfs_all_ready(struct ccg_dev *dev)
-{
- int i;
-
- for (i = 0; i < dev->max_func_num; i++)
- if (dev->ffs_tab[i].used && !dev->ffs_tab[i].desc_ready)
- return false;
-
- return true;
-}
-
-static int functionfs_ready_callback(struct ffs_data *ffs)
-{
- struct ffs_obj *ffs_obj;
- int ret;
-
- mutex_lock(&_ccg_dev->mutex);
-
- ffs_obj = ffs->private_data;
- if (!ffs_obj) {
- ret = -EINVAL;
- goto done;
- }
- if (WARN_ON(ffs_obj->desc_ready)) {
- ret = -EBUSY;
- goto done;
- }
- ffs_obj->ffs_data = ffs;
-
- if (functionfs_all_ready(_ccg_dev)) {
- ret = -EBUSY;
- goto done;
- }
- ffs_obj->desc_ready = true;
-
-done:
- mutex_unlock(&_ccg_dev->mutex);
- return ret;
-}
-
-static void reset_usb(struct ccg_dev *dev)
-{
- /* Cancel pending control requests */
- usb_ep_dequeue(dev->cdev->gadget->ep0, dev->cdev->req);
- usb_remove_config(dev->cdev, &ccg_config_driver);
- dev->enabled = false;
- usb_gadget_disconnect(dev->cdev->gadget);
-}
-
-static void functionfs_closed_callback(struct ffs_data *ffs)
-{
- struct ffs_obj *ffs_obj;
-
- mutex_lock(&_ccg_dev->mutex);
-
- ffs_obj = ffs->private_data;
- if (!ffs_obj)
- goto done;
-
- ffs_obj->desc_ready = false;
-
- if (_ccg_dev->enabled)
- reset_usb(_ccg_dev);
-
-done:
- mutex_unlock(&_ccg_dev->mutex);
-}
-
-static void *functionfs_acquire_dev_callback(const char *dev_name)
-{
- struct ffs_obj *ffs_dev;
-
- mutex_lock(&_ccg_dev->mutex);
-
- ffs_dev = functionfs_find_dev(_ccg_dev, dev_name);
- if (!ffs_dev) {
- ffs_dev = ERR_PTR(-ENODEV);
- goto done;
- }
-
- if (ffs_dev->mounted) {
- ffs_dev = ERR_PTR(-EBUSY);
- goto done;
- }
- ffs_dev->mounted = true;
-
-done:
- mutex_unlock(&_ccg_dev->mutex);
- return ffs_dev;
-}
-
-static void functionfs_release_dev_callback(struct ffs_data *ffs_data)
-{
- struct ffs_obj *ffs_dev;
-
- mutex_lock(&_ccg_dev->mutex);
-
- ffs_dev = ffs_data->private_data;
- if (ffs_dev)
- ffs_dev->mounted = false;
-
- mutex_unlock(&_ccg_dev->mutex);
-}
-
-static int functionfs_function_init(struct ccg_usb_function *f,
- struct usb_composite_dev *cdev)
-{
- return functionfs_init();
-}
-
-static void functionfs_function_cleanup(struct ccg_usb_function *f)
-{
- functionfs_cleanup();
-}
-
-static int functionfs_function_bind_config(struct ccg_usb_function *f,
- struct usb_configuration *c)
-{
- struct ccg_dev *dev = _ccg_dev;
- int i, ret;
-
- for (i = dev->max_func_num; i--; ) {
- if (!dev->ffs_tab[i].used)
- continue;
- ret = functionfs_bind(dev->ffs_tab[i].ffs_data, c->cdev);
- if (unlikely(ret < 0)) {
- while (++i < dev->max_func_num)
- functionfs_unbind(dev->ffs_tab[i].ffs_data);
- return ret;
- }
- }
-
- for (i = dev->max_func_num; i--; ) {
- if (!dev->ffs_tab[i].used)
- continue;
- ret = functionfs_bind_config(c->cdev, c,
- dev->ffs_tab[i].ffs_data);
- if (unlikely(ret < 0))
- return ret;
- }
-
- return 0;
-}
-
-static void functionfs_function_unbind_config(struct ccg_usb_function *f,
- struct usb_configuration *c)
-{
- struct ccg_dev *dev = _ccg_dev;
- int i;
-
- for (i = dev->max_func_num; i--; )
- if (dev->ffs_tab[i].ffs_data)
- functionfs_unbind(dev->ffs_tab[i].ffs_data);
-}
-
-static ssize_t functionfs_user_functions_show(struct device *_dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct ccg_dev *dev = _ccg_dev;
- char *buff = buf;
- int i;
-
- mutex_lock(&dev->mutex);
-
- for (i = 0; i < dev->max_func_num; i++)
- buff += snprintf(buff, PAGE_SIZE + buf - buff, "%s,",
- dev->ffs_tab[i].name);
-
- mutex_unlock(&dev->mutex);
-
- if (buff != buf)
- *(buff - 1) = '\n';
- return buff - buf;
-}
-
-static ssize_t functionfs_user_functions_store(struct device *_dev,
- struct device_attribute *attr,
- const char *buff, size_t size)
-{
- struct ccg_dev *dev = _ccg_dev;
- char *name, *b;
- ssize_t ret = size;
- int i;
-
- buff = skip_spaces(buff);
- if (!*buff)
- return -EINVAL;
-
- mutex_lock(&dev->mutex);
-
- if (dev->enabled) {
- ret = -EBUSY;
- goto end;
- }
-
- for (i = 0; i < dev->max_func_num; i++)
- if (dev->ffs_tab[i].mounted) {
- ret = -EBUSY;
- goto end;
- }
-
- strlcpy(func_names_buf, buff, sizeof(func_names_buf));
- b = strim(func_names_buf);
-
- /* replace the list of functions */
- dev->max_func_num = 0;
- while (b) {
- name = strsep(&b, ",");
- if (dev->max_func_num == GFS_MAX_DEVS) {
- ret = -ENOSPC;
- goto end;
- }
- if (functionfs_find_dev(dev, name)) {
- ret = -EEXIST;
- continue;
- }
- dev->ffs_tab[dev->max_func_num++].name = name;
- }
-
-end:
- mutex_unlock(&dev->mutex);
- return ret;
-}
-
-static DEVICE_ATTR(user_functions, S_IRUGO | S_IWUSR,
- functionfs_user_functions_show,
- functionfs_user_functions_store);
-
-static ssize_t functionfs_max_user_functions_show(struct device *_dev,
- struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%d", GFS_MAX_DEVS);
-}
-
-static DEVICE_ATTR(max_user_functions, S_IRUGO,
- functionfs_max_user_functions_show, NULL);
-
-static struct device_attribute *functionfs_function_attributes[] = {
- &dev_attr_user_functions,
- &dev_attr_max_user_functions,
- NULL
-};
-
-static struct ccg_usb_function functionfs_function = {
- .name = "fs",
- .init = functionfs_function_init,
- .cleanup = functionfs_function_cleanup,
- .bind_config = functionfs_function_bind_config,
- .unbind_config = functionfs_function_unbind_config,
- .attributes = functionfs_function_attributes,
-};
-
-#define MAX_ACM_INSTANCES 4
-struct acm_function_config {
- int instances;
-};
-
-static int
-acm_function_init(struct ccg_usb_function *f, struct usb_composite_dev *cdev)
-{
- f->config = kzalloc(sizeof(struct acm_function_config), GFP_KERNEL);
- if (!f->config)
- return -ENOMEM;
-
- return gserial_setup(cdev->gadget, MAX_ACM_INSTANCES);
-}
-
-static void acm_function_cleanup(struct ccg_usb_function *f)
-{
- gserial_cleanup();
- kfree(f->config);
- f->config = NULL;
-}
-
-static int
-acm_function_bind_config(struct ccg_usb_function *f,
- struct usb_configuration *c)
-{
- int i;
- int ret = 0;
- struct acm_function_config *config = f->config;
-
- for (i = 0; i < config->instances; i++) {
- ret = acm_bind_config(c, i);
- if (ret) {
- pr_err("Could not bind acm%u config\n", i);
- break;
- }
- }
-
- return ret;
-}
-
-static ssize_t acm_instances_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct acm_function_config *config = f->config;
- return sprintf(buf, "%d\n", config->instances);
-}
-
-static ssize_t acm_instances_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct acm_function_config *config = f->config;
- int value;
- int ret = 0;
-
- ret = kstrtoint(buf, 10, &value);
- if (ret)
- return ret;
-
- if (value > MAX_ACM_INSTANCES)
- return -EINVAL;
-
- config->instances = value;
-
- return size;
-}
-
-static DEVICE_ATTR(instances, S_IRUGO | S_IWUSR, acm_instances_show,
- acm_instances_store);
-static struct device_attribute *acm_function_attributes[] = {
- &dev_attr_instances,
- NULL
-};
-
-static struct ccg_usb_function acm_function = {
- .name = "acm",
- .init = acm_function_init,
- .cleanup = acm_function_cleanup,
- .bind_config = acm_function_bind_config,
- .attributes = acm_function_attributes,
-};
-
-struct rndis_function_config {
- u8 ethaddr[ETH_ALEN];
- u32 vendorID;
- char manufacturer[256];
- /* "Wireless" RNDIS; auto-detected by Windows */
- bool wceis;
-};
-
-static int rndis_function_init(struct ccg_usb_function *f,
- struct usb_composite_dev *cdev)
-{
- f->config = kzalloc(sizeof(struct rndis_function_config), GFP_KERNEL);
- if (!f->config)
- return -ENOMEM;
- return 0;
-}
-
-static void rndis_function_cleanup(struct ccg_usb_function *f)
-{
- kfree(f->config);
- f->config = NULL;
-}
-
-static int rndis_function_bind_config(struct ccg_usb_function *f,
- struct usb_configuration *c)
-{
- int ret;
- struct rndis_function_config *rndis = f->config;
-
- if (!rndis) {
- pr_err("%s: rndis_pdata\n", __func__);
- return -1;
- }
-
- pr_info("%s MAC: %pM\n", __func__, rndis->ethaddr);
-
- ret = gether_setup_name(c->cdev->gadget, rndis->ethaddr, "rndis");
- if (ret) {
- pr_err("%s: gether_setup failed\n", __func__);
- return ret;
- }
-
- if (rndis->wceis) {
- /* "Wireless" RNDIS; auto-detected by Windows */
- rndis_iad_descriptor.bFunctionClass =
- USB_CLASS_WIRELESS_CONTROLLER;
- rndis_iad_descriptor.bFunctionSubClass = 0x01;
- rndis_iad_descriptor.bFunctionProtocol = 0x03;
- rndis_control_intf.bInterfaceClass =
- USB_CLASS_WIRELESS_CONTROLLER;
- rndis_control_intf.bInterfaceSubClass = 0x01;
- rndis_control_intf.bInterfaceProtocol = 0x03;
- }
-
- return rndis_bind_config_vendor(c, rndis->ethaddr, rndis->vendorID,
- rndis->manufacturer);
-}
-
-static void rndis_function_unbind_config(struct ccg_usb_function *f,
- struct usb_configuration *c)
-{
- gether_cleanup();
-}
-
-static ssize_t rndis_manufacturer_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *config = f->config;
- return sprintf(buf, "%s\n", config->manufacturer);
-}
-
-static ssize_t rndis_manufacturer_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *config = f->config;
-
- if (size >= sizeof(config->manufacturer))
- return -EINVAL;
- memcpy(config->manufacturer, buf, size);
- config->manufacturer[size] = 0;
-
- return size;
-}
-
-static DEVICE_ATTR(manufacturer, S_IRUGO | S_IWUSR, rndis_manufacturer_show,
- rndis_manufacturer_store);
-
-static ssize_t rndis_wceis_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *config = f->config;
- return sprintf(buf, "%d\n", config->wceis);
-}
-
-static ssize_t rndis_wceis_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *config = f->config;
- int value;
- int ret;
-
- ret = kstrtoint(buf, 10, &value);
- if (ret)
- return ret;
-
- config->wceis = value;
-
- return size;
-}
-
-static DEVICE_ATTR(wceis, S_IRUGO | S_IWUSR, rndis_wceis_show,
- rndis_wceis_store);
-
-static ssize_t rndis_ethaddr_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *rndis = f->config;
- return sprintf(buf, "%pM\n", rndis->ethaddr);
-}
-
-static ssize_t rndis_ethaddr_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *rndis = f->config;
- unsigned char tmp[6];
-
- if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
- tmp + 0, tmp + 1, tmp + 2, tmp + 3, tmp + 4, tmp + 5) !=
- ETH_ALEN)
- return -EINVAL;
-
- memcpy(rndis->ethaddr, tmp, ETH_ALEN);
-
- return ETH_ALEN;
-
-}
-
-static DEVICE_ATTR(ethaddr, S_IRUGO | S_IWUSR, rndis_ethaddr_show,
- rndis_ethaddr_store);
-
-static ssize_t rndis_vendorID_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *config = f->config;
- return sprintf(buf, "%04x\n", config->vendorID);
-}
-
-static ssize_t rndis_vendorID_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t size)
-{
- struct ccg_usb_function *f = dev_get_drvdata(dev);
- struct rndis_function_config *config = f->config;
- int value;
- int ret;
-
- ret = kstrtou32(buf, 16, &value);
- if (ret)
- return ret;
-
- config->vendorID = value;
-
- return size;
-}
-
-static DEVICE_ATTR(vendorID, S_IRUGO | S_IWUSR, rndis_vendorID_show,
- rndis_vendorID_store);
-
-static struct device_attribute *rndis_function_attributes[] = {
- &dev_attr_manufacturer,
- &dev_attr_wceis,
- &dev_attr_ethaddr,
- &dev_attr_vendorID,
- NULL
-};
-
-static struct ccg_usb_function rndis_function = {
- .name = "rndis",
- .init = rndis_function_init,
- .cleanup = rndis_function_cleanup,
- .bind_config = rndis_function_bind_config,
- .unbind_config = rndis_function_unbind_config,
- .attributes = rndis_function_attributes,
-};
-
-static int mass_storage_function_init(struct ccg_usb_function *f,
- struct usb_composite_dev *cdev)
-{
- struct fsg_config fsg;
- struct fsg_common *common;
- int err;
-
- memset(&fsg, 0, sizeof(fsg));
- fsg.nluns = 1;
- fsg.luns[0].removable = 1;
- fsg.vendor_name = iManufacturer;
- fsg.product_name = iProduct;
-
- common = fsg_common_init(NULL, cdev, &fsg);
- if (IS_ERR(common))
- return PTR_ERR(common);
-
- err = sysfs_create_link(&f->dev->kobj,
- &common->luns[0].dev.kobj,
- "lun");
- if (err) {
- fsg_common_put(common);
- return err;
- }
-
- f->config = common;
- return 0;
-}
-
-static void mass_storage_function_cleanup(struct ccg_usb_function *f)
-{
- fsg_common_put(f->config);
- f->config = NULL;
-}
-
-static int mass_storage_function_bind_config(struct ccg_usb_function *f,
- struct usb_configuration *c)
-{
- struct fsg_common *common = f->config;
- return fsg_bind_config(c->cdev, c, common);
-}
-
-static struct ccg_usb_function mass_storage_function = {
- .name = "mass_storage",
- .init = mass_storage_function_init,
- .cleanup = mass_storage_function_cleanup,
- .bind_config = mass_storage_function_bind_config,
-};
-
-static struct ccg_usb_function *supported_functions[] = {
- &functionfs_function,
- &acm_function,
- &rndis_function,
- &mass_storage_function,
- NULL
-};
-
-
-static int ccg_init_functions(struct ccg_usb_function **functions,
- struct usb_composite_dev *cdev)
-{
- struct ccg_dev *dev = _ccg_dev;
- struct ccg_usb_function *f;
- struct device_attribute **attrs;
- struct device_attribute *attr;
- int err;
- int index = 0;
-
- for (; (f = *functions++); index++) {
- f->dev_name = kasprintf(GFP_KERNEL, "f_%s", f->name);
- if (!f->dev_name) {
- pr_err("%s: Failed to alloc name %s", __func__,
- f->name);
- err = -ENOMEM;
- goto err_alloc;
- }
- f->dev = device_create(ccg_class, dev->dev,
- MKDEV(0, index), f, f->dev_name);
- if (IS_ERR(f->dev)) {
- pr_err("%s: Failed to create dev %s", __func__,
- f->dev_name);
- err = PTR_ERR(f->dev);
- f->dev = NULL;
- goto err_create;
- }
-
- if (f->init) {
- err = f->init(f, cdev);
- if (err) {
- pr_err("%s: Failed to init %s", __func__,
- f->name);
- goto err_out;
- }
- }
-
- attrs = f->attributes;
- if (attrs) {
- while ((attr = *attrs++) && !err)
- err = device_create_file(f->dev, attr);
- }
- if (err) {
- pr_err("%s: Failed to create function %s attributes",
- __func__, f->name);
- goto err_uninit;
- }
- }
- return 0;
-
-err_uninit:
- if (f->cleanup)
- f->cleanup(f);
-err_out:
- device_destroy(ccg_class, f->dev->devt);
- f->dev = NULL;
-err_create:
- kfree(f->dev_name);
-err_alloc:
- return err;
-}
-
-static void ccg_cleanup_functions(struct ccg_usb_function **functions)
-{
- struct ccg_usb_function *f;
-
- while (*functions) {
- f = *functions++;
-
- if (f->dev) {
- if (f->cleanup)
- f->cleanup(f);
- device_destroy(ccg_class, f->dev->devt);
- kfree(f->dev_name);
- }
- }
-}
-
-static int ccg_bind_enabled_functions(struct ccg_dev *dev,
- struct usb_configuration *c)
-{
- struct ccg_usb_function *f;
- int ret;
-
- list_for_each_entry(f, &dev->enabled_functions, enabled_list) {
- ret = f->bind_config(f, c);
- if (ret) {
- pr_err("%s: %s failed", __func__, f->name);
- return ret;
- }
- }
- return 0;
-}
-
-static void ccg_unbind_enabled_functions(struct ccg_dev *dev,
- struct usb_configuration *c)
-{
- struct ccg_usb_function *f;
-
- list_for_each_entry(f, &dev->enabled_functions, enabled_list)
- if (f->unbind_config)
- f->unbind_config(f, c);
-}
-
-static int ccg_enable_function(struct ccg_dev *dev, char *name)
-{
- struct ccg_usb_function **functions = dev->functions;
- struct ccg_usb_function *f;
- while ((f = *functions++)) {
- if (!strcmp(name, f->name)) {
- list_add_tail(&f->enabled_list,
- &dev->enabled_functions);
- return 0;
- }
- }
- return -EINVAL;
-}
-
-/*-------------------------------------------------------------------------*/
-/* /sys/class/ccg_usb/ccg%d/ interface */
-
-static ssize_t
-functions_show(struct device *pdev, struct device_attribute *attr, char *buf)
-{
- struct ccg_dev *dev = dev_get_drvdata(pdev);
- struct ccg_usb_function *f;
- char *buff = buf;
- int i;
-
- mutex_lock(&dev->mutex);
-
- list_for_each_entry(f, &dev->enabled_functions, enabled_list)
- buff += sprintf(buff, "%s,", f->name);
- for (i = 0; i < dev->max_func_num; i++)
- if (dev->ffs_tab[i].used)
- buff += sprintf(buff, "%s", dev->ffs_tab[i].name);
-
- mutex_unlock(&dev->mutex);
-
- if (buff != buf)
- *(buff-1) = '\n';
- return buff - buf;
-}
-
-static ssize_t
-functions_store(struct device *pdev, struct device_attribute *attr,
- const char *buff, size_t size)
-{
- struct ccg_dev *dev = dev_get_drvdata(pdev);
- char *name;
- char buf[256], *b;
- int err, i;
- bool functionfs_enabled;
-
- buff = skip_spaces(buff);
- if (!*buff)
- return -EINVAL;
-
- mutex_lock(&dev->mutex);
-
- if (dev->enabled) {
- mutex_unlock(&dev->mutex);
- return -EBUSY;
- }
-
- INIT_LIST_HEAD(&dev->enabled_functions);
- functionfs_enabled = false;
- for (i = 0; i < dev->max_func_num; i++)
- dev->ffs_tab[i].used = false;
-
- strlcpy(buf, buff, sizeof(buf));
- b = strim(buf);
-
- while (b) {
- struct ffs_obj *user_func;
-
- name = strsep(&b, ",");
- /* handle FunctionFS implicitly */
- if (!strcmp(name, functionfs_function.name)) {
- pr_err("ccg_usb: Cannot explicitly enable '%s'", name);
- continue;
- }
- user_func = functionfs_find_dev(dev, name);
- if (user_func)
- name = functionfs_function.name;
- err = 0;
- if (!user_func || !functionfs_enabled)
- err = ccg_enable_function(dev, name);
- if (err)
- pr_err("ccg_usb: Cannot enable '%s'", name);
- else if (user_func) {
- user_func->used = true;
- dev->func_num++;
- functionfs_enabled = true;
- }
- }
-
- mutex_unlock(&dev->mutex);
-
- return size;
-}
-
-static ssize_t enable_show(struct device *pdev, struct device_attribute *attr,
- char *buf)
-{
- struct ccg_dev *dev = dev_get_drvdata(pdev);
- return sprintf(buf, "%d\n", dev->enabled);
-}
-
-static ssize_t enable_store(struct device *pdev, struct device_attribute *attr,
- const char *buff, size_t size)
-{
- struct ccg_dev *dev = dev_get_drvdata(pdev);
- struct usb_composite_dev *cdev = dev->cdev;
- int enabled = 0;
-
- mutex_lock(&dev->mutex);
- sscanf(buff, "%d", &enabled);
- if (enabled && dev->func_num && !functionfs_all_ready(dev)) {
- mutex_unlock(&dev->mutex);
- return -ENODEV;
- }
-
- if (enabled && !dev->enabled) {
- int ret;
-
- cdev->next_string_id = 0;
- /*
- * Update values in composite driver's copy of
- * device descriptor.
- */
- cdev->desc.bDeviceClass = device_desc.bDeviceClass;
- cdev->desc.bDeviceSubClass = device_desc.bDeviceSubClass;
- cdev->desc.bDeviceProtocol = device_desc.bDeviceProtocol;
- cdev->desc.idVendor = idVendor;
- cdev->desc.idProduct = idProduct;
- cdev->desc.bcdDevice = bcdDevice;
-
- usb_add_config(cdev, &ccg_config_driver, ccg_bind_config);
- dev->enabled = true;
- ret = usb_gadget_connect(cdev->gadget);
- if (ret) {
- dev->enabled = false;
- usb_remove_config(cdev, &ccg_config_driver);
- }
- } else if (!enabled && dev->enabled) {
- reset_usb(dev);
- } else {
- pr_err("ccg_usb: already %s\n",
- dev->enabled ? "enabled" : "disabled");
- }
-
- mutex_unlock(&dev->mutex);
- return size;
-}
-
-static ssize_t state_show(struct device *pdev, struct device_attribute *attr,
- char *buf)
-{
- struct ccg_dev *dev = dev_get_drvdata(pdev);
- struct usb_composite_dev *cdev = dev->cdev;
- char *state = "DISCONNECTED";
- unsigned long flags;
-
- if (!cdev)
- goto out;
-
- spin_lock_irqsave(&cdev->lock, flags);
- if (cdev->config)
- state = "CONFIGURED";
- else if (dev->connected)
- state = "CONNECTED";
- spin_unlock_irqrestore(&cdev->lock, flags);
-out:
- return sprintf(buf, "%s\n", state);
-}
-
-#define DESCRIPTOR_ATTR(field, format_string) \
-static ssize_t \
-field ## _show(struct device *dev, struct device_attribute *attr, \
- char *buf) \
-{ \
- return sprintf(buf, format_string, device_desc.field); \
-} \
-static ssize_t \
-field ## _store(struct device *dev, struct device_attribute *attr, \
- const char *buf, size_t size) \
-{ \
- int value; \
- if (sscanf(buf, format_string, &value) == 1) { \
- device_desc.field = value; \
- return size; \
- } \
- return -1; \
-} \
-static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, field ## _show, field ## _store);
-
-DESCRIPTOR_ATTR(bDeviceClass, "%d\n")
-DESCRIPTOR_ATTR(bDeviceSubClass, "%d\n")
-DESCRIPTOR_ATTR(bDeviceProtocol, "%d\n")
-
-static DEVICE_ATTR(functions, S_IRUGO | S_IWUSR, functions_show,
- functions_store);
-static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, enable_show, enable_store);
-static DEVICE_ATTR(state, S_IRUGO, state_show, NULL);
-
-static struct device_attribute *ccg_usb_attributes[] = {
- &dev_attr_bDeviceClass,
- &dev_attr_bDeviceSubClass,
- &dev_attr_bDeviceProtocol,
- &dev_attr_functions,
- &dev_attr_enable,
- &dev_attr_state,
- NULL
-};
-
-/*-------------------------------------------------------------------------*/
-/* Composite driver */
-
-static int ccg_bind_config(struct usb_configuration *c)
-{
- struct ccg_dev *dev = _ccg_dev;
- return ccg_bind_enabled_functions(dev, c);
-}
-
-static void ccg_unbind_config(struct usb_configuration *c)
-{
- struct ccg_dev *dev = _ccg_dev;
-
- ccg_unbind_enabled_functions(dev, c);
-
- usb_ep_autoconfig_reset(dev->cdev->gadget);
-}
-
-static int ccg_bind(struct usb_composite_dev *cdev)
-{
- struct ccg_dev *dev = _ccg_dev;
- struct usb_gadget *gadget = cdev->gadget;
- int gcnum, ret;
-
- /*
- * Start disconnected. Userspace will connect the gadget once
- * it is done configuring the functions.
- */
- usb_gadget_disconnect(gadget);
-
- ret = ccg_init_functions(dev->functions, cdev);
- if (ret)
- return ret;
-
- gcnum = usb_gadget_controller_number(gadget);
- if (gcnum >= 0)
- device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
- else {
- pr_warn("%s: controller '%s' not recognized\n",
- longname, gadget->name);
- device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
- }
-
- usb_gadget_set_selfpowered(gadget);
- dev->cdev = cdev;
-
- return 0;
-}
-
-static int ccg_usb_unbind(struct usb_composite_dev *cdev)
-{
- struct ccg_dev *dev = _ccg_dev;
-
- cancel_work_sync(&dev->work);
- ccg_cleanup_functions(dev->functions);
- return 0;
-}
-
-static struct usb_composite_driver ccg_usb_driver = {
- .name = "configurable_usb",
- .dev = &device_desc,
- .bind = ccg_bind,
- .unbind = ccg_usb_unbind,
- .needs_serial = true,
- .iManufacturer = "Linux Foundation",
- .iProduct = longname,
- .iSerialNumber = "1234567890123456",
-};
-
-static int ccg_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *c)
-{
- struct ccg_dev *dev = _ccg_dev;
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
- struct usb_request *req = cdev->req;
- struct ccg_usb_function *f;
- int value = -EOPNOTSUPP;
- unsigned long flags;
-
- req->zero = 0;
- req->complete = composite_setup_complete;
- req->length = 0;
- gadget->ep0->driver_data = cdev;
-
- list_for_each_entry(f, &dev->enabled_functions, enabled_list) {
- if (f->ctrlrequest) {
- value = f->ctrlrequest(f, cdev, c);
- if (value >= 0)
- break;
- }
- }
-
- if (value < 0)
- value = composite_setup(gadget, c);
-
- spin_lock_irqsave(&cdev->lock, flags);
- if (!dev->connected) {
- dev->connected = 1;
- schedule_work(&dev->work);
- } else if (c->bRequest == USB_REQ_SET_CONFIGURATION &&
- cdev->config) {
- schedule_work(&dev->work);
- }
- spin_unlock_irqrestore(&cdev->lock, flags);
-
- return value;
-}
-
-static void ccg_disconnect(struct usb_gadget *gadget)
-{
- struct ccg_dev *dev = _ccg_dev;
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
- unsigned long flags;
-
- composite_disconnect(gadget);
-
- spin_lock_irqsave(&cdev->lock, flags);
- dev->connected = 0;
- schedule_work(&dev->work);
- spin_unlock_irqrestore(&cdev->lock, flags);
-}
-
-static int ccg_create_device(struct ccg_dev *dev)
-{
- struct device_attribute **attrs = ccg_usb_attributes;
- struct device_attribute *attr;
- int err;
-
- dev->dev = device_create(ccg_class, NULL, MKDEV(0, 0), NULL, "ccg0");
- if (IS_ERR(dev->dev))
- return PTR_ERR(dev->dev);
-
- dev_set_drvdata(dev->dev, dev);
-
- while ((attr = *attrs++)) {
- err = device_create_file(dev->dev, attr);
- if (err) {
- device_destroy(ccg_class, dev->dev->devt);
- return err;
- }
- }
- return 0;
-}
-
-
-static int __init ccg_init(void)
-{
- struct ccg_dev *dev;
- int err;
-
- ccg_class = class_create(THIS_MODULE, "ccg_usb");
- if (IS_ERR(ccg_class))
- return PTR_ERR(ccg_class);
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev) {
- class_destroy(ccg_class);
- return -ENOMEM;
- }
-
- dev->functions = supported_functions;
- INIT_LIST_HEAD(&dev->enabled_functions);
- INIT_WORK(&dev->work, ccg_work);
- mutex_init(&dev->mutex);
-
- err = ccg_create_device(dev);
- if (err) {
- class_destroy(ccg_class);
- kfree(dev);
- return err;
- }
-
- _ccg_dev = dev;
-
- /* Override composite driver functions */
- composite_driver.setup = ccg_setup;
- composite_driver.disconnect = ccg_disconnect;
-
- err = usb_composite_probe(&ccg_usb_driver);
- if (err) {
- class_destroy(ccg_class);
- kfree(dev);
- }
-
- return err;
-}
-module_init(ccg_init);
-
-static void __exit ccg_exit(void)
-{
- usb_composite_unregister(&ccg_usb_driver);
- class_destroy(ccg_class);
- kfree(_ccg_dev);
- _ccg_dev = NULL;
-}
-module_exit(ccg_exit);
+++ /dev/null
-/*
- * composite.c - infrastructure for Composite USB Gadgets
- *
- * Copyright (C) 2006-2008 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/kallsyms.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/utsname.h>
-
-#include <linux/usb/composite.h>
-#include <asm/unaligned.h>
-
-/*
- * The code in this file is utility code, used to build a gadget driver
- * from one or more "function" drivers, one or more "configuration"
- * objects, and a "usb_composite_driver" by gluing them together along
- * with the relevant device-wide data.
- */
-
-/* big enough to hold our biggest descriptor */
-#define USB_BUFSIZ 1024
-
-static struct usb_composite_driver *composite;
-
-/* Some systems will need runtime overrides for the product identifiers
- * published in the device descriptor, either numbers or strings or both.
- * String parameters are in UTF-8 (superset of ASCII's 7 bit characters).
- */
-
-static ushort idVendor;
-module_param(idVendor, ushort, 0644);
-MODULE_PARM_DESC(idVendor, "USB Vendor ID");
-
-static ushort idProduct;
-module_param(idProduct, ushort, 0644);
-MODULE_PARM_DESC(idProduct, "USB Product ID");
-
-static ushort bcdDevice;
-module_param(bcdDevice, ushort, 0644);
-MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
-
-static char *iManufacturer;
-module_param(iManufacturer, charp, 0644);
-MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
-
-static char *iProduct;
-module_param(iProduct, charp, 0644);
-MODULE_PARM_DESC(iProduct, "USB Product string");
-
-static char *iSerialNumber;
-module_param(iSerialNumber, charp, 0644);
-MODULE_PARM_DESC(iSerialNumber, "SerialNumber string");
-
-static char composite_manufacturer[50];
-
-/*-------------------------------------------------------------------------*/
-/**
- * next_ep_desc() - advance to the next EP descriptor
- * @t: currect pointer within descriptor array
- *
- * Return: next EP descriptor or NULL
- *
- * Iterate over @t until either EP descriptor found or
- * NULL (that indicates end of list) encountered
- */
-static struct usb_descriptor_header**
-next_ep_desc(struct usb_descriptor_header **t)
-{
- for (; *t; t++) {
- if ((*t)->bDescriptorType == USB_DT_ENDPOINT)
- return t;
- }
- return NULL;
-}
-
-/*
- * for_each_ep_desc()- iterate over endpoint descriptors in the
- * descriptors list
- * @start: pointer within descriptor array.
- * @ep_desc: endpoint descriptor to use as the loop cursor
- */
-#define for_each_ep_desc(start, ep_desc) \
- for (ep_desc = next_ep_desc(start); \
- ep_desc; ep_desc = next_ep_desc(ep_desc+1))
-
-/**
- * config_ep_by_speed() - configures the given endpoint
- * according to gadget speed.
- * @g: pointer to the gadget
- * @f: usb function
- * @_ep: the endpoint to configure
- *
- * Return: error code, 0 on success
- *
- * This function chooses the right descriptors for a given
- * endpoint according to gadget speed and saves it in the
- * endpoint desc field. If the endpoint already has a descriptor
- * assigned to it - overwrites it with currently corresponding
- * descriptor. The endpoint maxpacket field is updated according
- * to the chosen descriptor.
- * Note: the supplied function should hold all the descriptors
- * for supported speeds
- */
-int config_ep_by_speed(struct usb_gadget *g,
- struct usb_function *f,
- struct usb_ep *_ep)
-{
- struct usb_composite_dev *cdev = get_gadget_data(g);
- struct usb_endpoint_descriptor *chosen_desc = NULL;
- struct usb_descriptor_header **speed_desc = NULL;
-
- struct usb_ss_ep_comp_descriptor *comp_desc = NULL;
- int want_comp_desc = 0;
-
- struct usb_descriptor_header **d_spd; /* cursor for speed desc */
-
- if (!g || !f || !_ep)
- return -EIO;
-
- /* select desired speed */
- switch (g->speed) {
- case USB_SPEED_SUPER:
- if (gadget_is_superspeed(g)) {
- speed_desc = f->ss_descriptors;
- want_comp_desc = 1;
- break;
- }
- /* else: Fall trough */
- case USB_SPEED_HIGH:
- if (gadget_is_dualspeed(g)) {
- speed_desc = f->hs_descriptors;
- break;
- }
- /* else: fall through */
- default:
- speed_desc = f->descriptors;
- }
- /* find descriptors */
- for_each_ep_desc(speed_desc, d_spd) {
- chosen_desc = (struct usb_endpoint_descriptor *)*d_spd;
- if (chosen_desc->bEndpointAddress == _ep->address)
- goto ep_found;
- }
- return -EIO;
-
-ep_found:
- /* commit results */
- _ep->maxpacket = usb_endpoint_maxp(chosen_desc);
- _ep->desc = chosen_desc;
- _ep->comp_desc = NULL;
- _ep->maxburst = 0;
- _ep->mult = 0;
- if (!want_comp_desc)
- return 0;
-
- /*
- * Companion descriptor should follow EP descriptor
- * USB 3.0 spec, #9.6.7
- */
- comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd);
- if (!comp_desc ||
- (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP))
- return -EIO;
- _ep->comp_desc = comp_desc;
- if (g->speed == USB_SPEED_SUPER) {
- switch (usb_endpoint_type(_ep->desc)) {
- case USB_ENDPOINT_XFER_ISOC:
- /* mult: bits 1:0 of bmAttributes */
- _ep->mult = comp_desc->bmAttributes & 0x3;
- case USB_ENDPOINT_XFER_BULK:
- case USB_ENDPOINT_XFER_INT:
- _ep->maxburst = comp_desc->bMaxBurst + 1;
- break;
- default:
- if (comp_desc->bMaxBurst != 0)
- ERROR(cdev, "ep0 bMaxBurst must be 0\n");
- _ep->maxburst = 1;
- break;
- }
- }
- return 0;
-}
-
-/**
- * usb_add_function() - add a function to a configuration
- * @config: the configuration
- * @function: the function being added
- * Context: single threaded during gadget setup
- *
- * After initialization, each configuration must have one or more
- * functions added to it. Adding a function involves calling its @bind()
- * method to allocate resources such as interface and string identifiers
- * and endpoints.
- *
- * This function returns the value of the function's bind(), which is
- * zero for success else a negative errno value.
- */
-int usb_add_function(struct usb_configuration *config,
- struct usb_function *function)
-{
- int value = -EINVAL;
-
- DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n",
- function->name, function,
- config->label, config);
-
- if (!function->set_alt || !function->disable)
- goto done;
-
- function->config = config;
- list_add_tail(&function->list, &config->functions);
-
- /* REVISIT *require* function->bind? */
- if (function->bind) {
- value = function->bind(config, function);
- if (value < 0) {
- list_del(&function->list);
- function->config = NULL;
- }
- } else
- value = 0;
-
- /* We allow configurations that don't work at both speeds.
- * If we run into a lowspeed Linux system, treat it the same
- * as full speed ... it's the function drivers that will need
- * to avoid bulk and ISO transfers.
- */
- if (!config->fullspeed && function->descriptors)
- config->fullspeed = true;
- if (!config->highspeed && function->hs_descriptors)
- config->highspeed = true;
- if (!config->superspeed && function->ss_descriptors)
- config->superspeed = true;
-
-done:
- if (value)
- DBG(config->cdev, "adding '%s'/%p --> %d\n",
- function->name, function, value);
- return value;
-}
-
-/**
- * usb_function_deactivate - prevent function and gadget enumeration
- * @function: the function that isn't yet ready to respond
- *
- * Blocks response of the gadget driver to host enumeration by
- * preventing the data line pullup from being activated. This is
- * normally called during @bind() processing to change from the
- * initial "ready to respond" state, or when a required resource
- * becomes available.
- *
- * For example, drivers that serve as a passthrough to a userspace
- * daemon can block enumeration unless that daemon (such as an OBEX,
- * MTP, or print server) is ready to handle host requests.
- *
- * Not all systems support software control of their USB peripheral
- * data pullups.
- *
- * Returns zero on success, else negative errno.
- */
-int usb_function_deactivate(struct usb_function *function)
-{
- struct usb_composite_dev *cdev = function->config->cdev;
- unsigned long flags;
- int status = 0;
-
- spin_lock_irqsave(&cdev->lock, flags);
-
- if (cdev->deactivations == 0)
- status = usb_gadget_disconnect(cdev->gadget);
- if (status == 0)
- cdev->deactivations++;
-
- spin_unlock_irqrestore(&cdev->lock, flags);
- return status;
-}
-
-/**
- * usb_function_activate - allow function and gadget enumeration
- * @function: function on which usb_function_activate() was called
- *
- * Reverses effect of usb_function_deactivate(). If no more functions
- * are delaying their activation, the gadget driver will respond to
- * host enumeration procedures.
- *
- * Returns zero on success, else negative errno.
- */
-int usb_function_activate(struct usb_function *function)
-{
- struct usb_composite_dev *cdev = function->config->cdev;
- unsigned long flags;
- int status = 0;
-
- spin_lock_irqsave(&cdev->lock, flags);
-
- if (WARN_ON(cdev->deactivations == 0))
- status = -EINVAL;
- else {
- cdev->deactivations--;
- if (cdev->deactivations == 0)
- status = usb_gadget_connect(cdev->gadget);
- }
-
- spin_unlock_irqrestore(&cdev->lock, flags);
- return status;
-}
-
-/**
- * usb_interface_id() - allocate an unused interface ID
- * @config: configuration associated with the interface
- * @function: function handling the interface
- * Context: single threaded during gadget setup
- *
- * usb_interface_id() is called from usb_function.bind() callbacks to
- * allocate new interface IDs. The function driver will then store that
- * ID in interface, association, CDC union, and other descriptors. It
- * will also handle any control requests targeted at that interface,
- * particularly changing its altsetting via set_alt(). There may
- * also be class-specific or vendor-specific requests to handle.
- *
- * All interface identifier should be allocated using this routine, to
- * ensure that for example different functions don't wrongly assign
- * different meanings to the same identifier. Note that since interface
- * identifiers are configuration-specific, functions used in more than
- * one configuration (or more than once in a given configuration) need
- * multiple versions of the relevant descriptors.
- *
- * Returns the interface ID which was allocated; or -ENODEV if no
- * more interface IDs can be allocated.
- */
-int usb_interface_id(struct usb_configuration *config,
- struct usb_function *function)
-{
- unsigned id = config->next_interface_id;
-
- if (id < MAX_CONFIG_INTERFACES) {
- config->interface[id] = function;
- config->next_interface_id = id + 1;
- return id;
- }
- return -ENODEV;
-}
-
-static int config_buf(struct usb_configuration *config,
- enum usb_device_speed speed, void *buf, u8 type)
-{
- struct usb_config_descriptor *c = buf;
- void *next = buf + USB_DT_CONFIG_SIZE;
- int len = USB_BUFSIZ - USB_DT_CONFIG_SIZE;
- struct usb_function *f;
- int status;
-
- /* write the config descriptor */
- c = buf;
- c->bLength = USB_DT_CONFIG_SIZE;
- c->bDescriptorType = type;
- /* wTotalLength is written later */
- c->bNumInterfaces = config->next_interface_id;
- c->bConfigurationValue = config->bConfigurationValue;
- c->iConfiguration = config->iConfiguration;
- c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes;
- c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2);
-
- /* There may be e.g. OTG descriptors */
- if (config->descriptors) {
- status = usb_descriptor_fillbuf(next, len,
- config->descriptors);
- if (status < 0)
- return status;
- len -= status;
- next += status;
- }
-
- /* add each function's descriptors */
- list_for_each_entry(f, &config->functions, list) {
- struct usb_descriptor_header **descriptors;
-
- switch (speed) {
- case USB_SPEED_SUPER:
- descriptors = f->ss_descriptors;
- break;
- case USB_SPEED_HIGH:
- descriptors = f->hs_descriptors;
- break;
- default:
- descriptors = f->descriptors;
- }
-
- if (!descriptors)
- continue;
- status = usb_descriptor_fillbuf(next, len,
- (const struct usb_descriptor_header **) descriptors);
- if (status < 0)
- return status;
- len -= status;
- next += status;
- }
-
- len = next - buf;
- c->wTotalLength = cpu_to_le16(len);
- return len;
-}
-
-static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
-{
- struct usb_gadget *gadget = cdev->gadget;
- struct usb_configuration *c;
- u8 type = w_value >> 8;
- enum usb_device_speed speed = USB_SPEED_UNKNOWN;
-
- if (gadget->speed == USB_SPEED_SUPER)
- speed = gadget->speed;
- else if (gadget_is_dualspeed(gadget)) {
- int hs = 0;
- if (gadget->speed == USB_SPEED_HIGH)
- hs = 1;
- if (type == USB_DT_OTHER_SPEED_CONFIG)
- hs = !hs;
- if (hs)
- speed = USB_SPEED_HIGH;
-
- }
-
- /* This is a lookup by config *INDEX* */
- w_value &= 0xff;
- list_for_each_entry(c, &cdev->configs, list) {
- /* ignore configs that won't work at this speed */
- switch (speed) {
- case USB_SPEED_SUPER:
- if (!c->superspeed)
- continue;
- break;
- case USB_SPEED_HIGH:
- if (!c->highspeed)
- continue;
- break;
- default:
- if (!c->fullspeed)
- continue;
- }
-
- if (w_value == 0)
- return config_buf(c, speed, cdev->req->buf, type);
- w_value--;
- }
- return -EINVAL;
-}
-
-static int count_configs(struct usb_composite_dev *cdev, unsigned type)
-{
- struct usb_gadget *gadget = cdev->gadget;
- struct usb_configuration *c;
- unsigned count = 0;
- int hs = 0;
- int ss = 0;
-
- if (gadget_is_dualspeed(gadget)) {
- if (gadget->speed == USB_SPEED_HIGH)
- hs = 1;
- if (gadget->speed == USB_SPEED_SUPER)
- ss = 1;
- if (type == USB_DT_DEVICE_QUALIFIER)
- hs = !hs;
- }
- list_for_each_entry(c, &cdev->configs, list) {
- /* ignore configs that won't work at this speed */
- if (ss) {
- if (!c->superspeed)
- continue;
- } else if (hs) {
- if (!c->highspeed)
- continue;
- } else {
- if (!c->fullspeed)
- continue;
- }
- count++;
- }
- return count;
-}
-
-/**
- * bos_desc() - prepares the BOS descriptor.
- * @cdev: pointer to usb_composite device to generate the bos
- * descriptor for
- *
- * This function generates the BOS (Binary Device Object)
- * descriptor and its device capabilities descriptors. The BOS
- * descriptor should be supported by a SuperSpeed device.
- */
-static int bos_desc(struct usb_composite_dev *cdev)
-{
- struct usb_ext_cap_descriptor *usb_ext;
- struct usb_ss_cap_descriptor *ss_cap;
- struct usb_dcd_config_params dcd_config_params;
- struct usb_bos_descriptor *bos = cdev->req->buf;
-
- bos->bLength = USB_DT_BOS_SIZE;
- bos->bDescriptorType = USB_DT_BOS;
-
- bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE);
- bos->bNumDeviceCaps = 0;
-
- /*
- * A SuperSpeed device shall include the USB2.0 extension descriptor
- * and shall support LPM when operating in USB2.0 HS mode.
- */
- usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
- bos->bNumDeviceCaps++;
- le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE);
- usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
- usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
- usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
- usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT);
-
- /*
- * The Superspeed USB Capability descriptor shall be implemented by all
- * SuperSpeed devices.
- */
- ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
- bos->bNumDeviceCaps++;
- le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE);
- ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;
- ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
- ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;
- ss_cap->bmAttributes = 0; /* LTM is not supported yet */
- ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION |
- USB_FULL_SPEED_OPERATION |
- USB_HIGH_SPEED_OPERATION |
- USB_5GBPS_OPERATION);
- ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
-
- /* Get Controller configuration */
- if (cdev->gadget->ops->get_config_params)
- cdev->gadget->ops->get_config_params(&dcd_config_params);
- else {
- dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT;
- dcd_config_params.bU2DevExitLat =
- cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
- }
- ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
- ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
-
- return le16_to_cpu(bos->wTotalLength);
-}
-
-static void device_qual(struct usb_composite_dev *cdev)
-{
- struct usb_qualifier_descriptor *qual = cdev->req->buf;
-
- qual->bLength = sizeof(*qual);
- qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER;
- /* POLICY: same bcdUSB and device type info at both speeds */
- qual->bcdUSB = cdev->desc.bcdUSB;
- qual->bDeviceClass = cdev->desc.bDeviceClass;
- qual->bDeviceSubClass = cdev->desc.bDeviceSubClass;
- qual->bDeviceProtocol = cdev->desc.bDeviceProtocol;
- /* ASSUME same EP0 fifo size at both speeds */
- qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket;
- qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER);
- qual->bRESERVED = 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void reset_config(struct usb_composite_dev *cdev)
-{
- struct usb_function *f;
-
- DBG(cdev, "reset config\n");
-
- list_for_each_entry(f, &cdev->config->functions, list) {
- if (f->disable)
- f->disable(f);
-
- bitmap_zero(f->endpoints, 32);
- }
- cdev->config = NULL;
-}
-
-static int set_config(struct usb_composite_dev *cdev,
- const struct usb_ctrlrequest *ctrl, unsigned number)
-{
- struct usb_gadget *gadget = cdev->gadget;
- struct usb_configuration *c = NULL;
- int result = -EINVAL;
- unsigned power = gadget_is_otg(gadget) ? 8 : 100;
- int tmp;
-
- if (number) {
- list_for_each_entry(c, &cdev->configs, list) {
- if (c->bConfigurationValue == number) {
- /*
- * We disable the FDs of the previous
- * configuration only if the new configuration
- * is a valid one
- */
- if (cdev->config)
- reset_config(cdev);
- result = 0;
- break;
- }
- }
- if (result < 0)
- goto done;
- } else { /* Zero configuration value - need to reset the config */
- if (cdev->config)
- reset_config(cdev);
- result = 0;
- }
-
- INFO(cdev, "%s config #%d: %s\n",
- usb_speed_string(gadget->speed),
- number, c ? c->label : "unconfigured");
-
- if (!c)
- goto done;
-
- cdev->config = c;
-
- /* Initialize all interfaces by setting them to altsetting zero. */
- for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) {
- struct usb_function *f = c->interface[tmp];
- struct usb_descriptor_header **descriptors;
-
- if (!f)
- break;
-
- /*
- * Record which endpoints are used by the function. This is used
- * to dispatch control requests targeted at that endpoint to the
- * function's setup callback instead of the current
- * configuration's setup callback.
- */
- switch (gadget->speed) {
- case USB_SPEED_SUPER:
- descriptors = f->ss_descriptors;
- break;
- case USB_SPEED_HIGH:
- descriptors = f->hs_descriptors;
- break;
- default:
- descriptors = f->descriptors;
- }
-
- for (; *descriptors; ++descriptors) {
- struct usb_endpoint_descriptor *ep;
- int addr;
-
- if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT)
- continue;
-
- ep = (struct usb_endpoint_descriptor *)*descriptors;
- addr = ((ep->bEndpointAddress & 0x80) >> 3)
- | (ep->bEndpointAddress & 0x0f);
- set_bit(addr, f->endpoints);
- }
-
- result = f->set_alt(f, tmp, 0);
- if (result < 0) {
- DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n",
- tmp, f->name, f, result);
-
- reset_config(cdev);
- goto done;
- }
-
- if (result == USB_GADGET_DELAYED_STATUS) {
- DBG(cdev,
- "%s: interface %d (%s) requested delayed status\n",
- __func__, tmp, f->name);
- cdev->delayed_status++;
- DBG(cdev, "delayed_status count %d\n",
- cdev->delayed_status);
- }
- }
-
- /* when we return, be sure our power usage is valid */
- power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW;
-done:
- usb_gadget_vbus_draw(gadget, power);
- if (result >= 0 && cdev->delayed_status)
- result = USB_GADGET_DELAYED_STATUS;
- return result;
-}
-
-/**
- * usb_add_config() - add a configuration to a device.
- * @cdev: wraps the USB gadget
- * @config: the configuration, with bConfigurationValue assigned
- * @bind: the configuration's bind function
- * Context: single threaded during gadget setup
- *
- * One of the main tasks of a composite @bind() routine is to
- * add each of the configurations it supports, using this routine.
- *
- * This function returns the value of the configuration's @bind(), which
- * is zero for success else a negative errno value. Binding configurations
- * assigns global resources including string IDs, and per-configuration
- * resources such as interface IDs and endpoints.
- */
-int usb_add_config(struct usb_composite_dev *cdev,
- struct usb_configuration *config,
- int (*bind)(struct usb_configuration *))
-{
- int status = -EINVAL;
- struct usb_configuration *c;
-
- DBG(cdev, "adding config #%u '%s'/%p\n",
- config->bConfigurationValue,
- config->label, config);
-
- if (!config->bConfigurationValue || !bind)
- goto done;
-
- /* Prevent duplicate configuration identifiers */
- list_for_each_entry(c, &cdev->configs, list) {
- if (c->bConfigurationValue == config->bConfigurationValue) {
- status = -EBUSY;
- goto done;
- }
- }
-
- config->cdev = cdev;
- list_add_tail(&config->list, &cdev->configs);
-
- INIT_LIST_HEAD(&config->functions);
- config->next_interface_id = 0;
- memset(config->interface, 0, sizeof(config->interface));
-
- status = bind(config);
- if (status < 0) {
- while (!list_empty(&config->functions)) {
- struct usb_function *f;
-
- f = list_first_entry(&config->functions,
- struct usb_function, list);
- list_del(&f->list);
- if (f->unbind) {
- DBG(cdev, "unbind function '%s'/%p\n",
- f->name, f);
- f->unbind(config, f);
- /* may free memory for "f" */
- }
- }
- list_del(&config->list);
- config->cdev = NULL;
- } else {
- unsigned i;
-
- DBG(cdev, "cfg %d/%p speeds:%s%s%s\n",
- config->bConfigurationValue, config,
- config->superspeed ? " super" : "",
- config->highspeed ? " high" : "",
- config->fullspeed
- ? (gadget_is_dualspeed(cdev->gadget)
- ? " full"
- : " full/low")
- : "");
-
- for (i = 0; i < MAX_CONFIG_INTERFACES; i++) {
- struct usb_function *f = config->interface[i];
-
- if (!f)
- continue;
- DBG(cdev, " interface %d = %s/%p\n",
- i, f->name, f);
- }
- }
-
- /* set_alt(), or next bind(), sets up
- * ep->driver_data as needed.
- */
- usb_ep_autoconfig_reset(cdev->gadget);
-
-done:
- if (status)
- DBG(cdev, "added config '%s'/%u --> %d\n", config->label,
- config->bConfigurationValue, status);
- return status;
-}
-
-static void remove_config(struct usb_composite_dev *cdev,
- struct usb_configuration *config)
-{
- while (!list_empty(&config->functions)) {
- struct usb_function *f;
-
- f = list_first_entry(&config->functions,
- struct usb_function, list);
- list_del(&f->list);
- if (f->unbind) {
- DBG(cdev, "unbind function '%s'/%p\n", f->name, f);
- f->unbind(config, f);
- /* may free memory for "f" */
- }
- }
- list_del(&config->list);
- if (config->unbind) {
- DBG(cdev, "unbind config '%s'/%p\n", config->label, config);
- config->unbind(config);
- /* may free memory for "c" */
- }
-}
-
-/**
- * usb_remove_config() - remove a configuration from a device.
- * @cdev: wraps the USB gadget
- * @config: the configuration
- *
- * Drivers must call usb_gadget_disconnect before calling this function
- * to disconnect the device from the host and make sure the host will not
- * try to enumerate the device while we are changing the config list.
- */
-void usb_remove_config(struct usb_composite_dev *cdev,
- struct usb_configuration *config)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cdev->lock, flags);
-
- if (cdev->config == config)
- reset_config(cdev);
-
- spin_unlock_irqrestore(&cdev->lock, flags);
-
- remove_config(cdev, config);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* We support strings in multiple languages ... string descriptor zero
- * says which languages are supported. The typical case will be that
- * only one language (probably English) is used, with I18N handled on
- * the host side.
- */
-
-static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf)
-{
- const struct usb_gadget_strings *s;
- __le16 language;
- __le16 *tmp;
-
- while (*sp) {
- s = *sp;
- language = cpu_to_le16(s->language);
- for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) {
- if (*tmp == language)
- goto repeat;
- }
- *tmp++ = language;
-repeat:
- sp++;
- }
-}
-
-static int lookup_string(
- struct usb_gadget_strings **sp,
- void *buf,
- u16 language,
- int id
-)
-{
- struct usb_gadget_strings *s;
- int value;
-
- while (*sp) {
- s = *sp++;
- if (s->language != language)
- continue;
- value = usb_gadget_get_string(s, id, buf);
- if (value > 0)
- return value;
- }
- return -EINVAL;
-}
-
-static int get_string(struct usb_composite_dev *cdev,
- void *buf, u16 language, int id)
-{
- struct usb_configuration *c;
- struct usb_function *f;
- int len;
- const char *str;
-
- /* Yes, not only is USB's I18N support probably more than most
- * folk will ever care about ... also, it's all supported here.
- * (Except for UTF8 support for Unicode's "Astral Planes".)
- */
-
- /* 0 == report all available language codes */
- if (id == 0) {
- struct usb_string_descriptor *s = buf;
- struct usb_gadget_strings **sp;
-
- memset(s, 0, 256);
- s->bDescriptorType = USB_DT_STRING;
-
- sp = composite->strings;
- if (sp)
- collect_langs(sp, s->wData);
-
- list_for_each_entry(c, &cdev->configs, list) {
- sp = c->strings;
- if (sp)
- collect_langs(sp, s->wData);
-
- list_for_each_entry(f, &c->functions, list) {
- sp = f->strings;
- if (sp)
- collect_langs(sp, s->wData);
- }
- }
-
- for (len = 0; len <= 126 && s->wData[len]; len++)
- continue;
- if (!len)
- return -EINVAL;
-
- s->bLength = 2 * (len + 1);
- return s->bLength;
- }
-
- /* Otherwise, look up and return a specified string. First
- * check if the string has not been overridden.
- */
- if (cdev->manufacturer_override == id)
- str = iManufacturer ?: composite->iManufacturer ?:
- composite_manufacturer;
- else if (cdev->product_override == id)
- str = iProduct ?: composite->iProduct;
- else if (cdev->serial_override == id)
- str = iSerialNumber ?: composite->iSerialNumber;
- else
- str = NULL;
- if (str) {
- struct usb_gadget_strings strings = {
- .language = language,
- .strings = &(struct usb_string) { 0xff, str }
- };
- return usb_gadget_get_string(&strings, 0xff, buf);
- }
-
- /* String IDs are device-scoped, so we look up each string
- * table we're told about. These lookups are infrequent;
- * simpler-is-better here.
- */
- if (composite->strings) {
- len = lookup_string(composite->strings, buf, language, id);
- if (len > 0)
- return len;
- }
- list_for_each_entry(c, &cdev->configs, list) {
- if (c->strings) {
- len = lookup_string(c->strings, buf, language, id);
- if (len > 0)
- return len;
- }
- list_for_each_entry(f, &c->functions, list) {
- if (!f->strings)
- continue;
- len = lookup_string(f->strings, buf, language, id);
- if (len > 0)
- return len;
- }
- }
- return -EINVAL;
-}
-
-/**
- * usb_string_id() - allocate an unused string ID
- * @cdev: the device whose string descriptor IDs are being allocated
- * Context: single threaded during gadget setup
- *
- * @usb_string_id() is called from bind() callbacks to allocate
- * string IDs. Drivers for functions, configurations, or gadgets will
- * then store that ID in the appropriate descriptors and string table.
- *
- * All string identifier should be allocated using this,
- * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure
- * that for example different functions don't wrongly assign different
- * meanings to the same identifier.
- */
-int usb_string_id(struct usb_composite_dev *cdev)
-{
- if (cdev->next_string_id < 254) {
- /* string id 0 is reserved by USB spec for list of
- * supported languages */
- /* 255 reserved as well? -- mina86 */
- cdev->next_string_id++;
- return cdev->next_string_id;
- }
- return -ENODEV;
-}
-
-/**
- * usb_string_ids() - allocate unused string IDs in batch
- * @cdev: the device whose string descriptor IDs are being allocated
- * @str: an array of usb_string objects to assign numbers to
- * Context: single threaded during gadget setup
- *
- * @usb_string_ids() is called from bind() callbacks to allocate
- * string IDs. Drivers for functions, configurations, or gadgets will
- * then copy IDs from the string table to the appropriate descriptors
- * and string table for other languages.
- *
- * All string identifier should be allocated using this,
- * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for
- * example different functions don't wrongly assign different meanings
- * to the same identifier.
- */
-int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str)
-{
- int next = cdev->next_string_id;
-
- for (; str->s; ++str) {
- if (unlikely(next >= 254))
- return -ENODEV;
- str->id = ++next;
- }
-
- cdev->next_string_id = next;
-
- return 0;
-}
-
-/**
- * usb_string_ids_n() - allocate unused string IDs in batch
- * @c: the device whose string descriptor IDs are being allocated
- * @n: number of string IDs to allocate
- * Context: single threaded during gadget setup
- *
- * Returns the first requested ID. This ID and next @n-1 IDs are now
- * valid IDs. At least provided that @n is non-zero because if it
- * is, returns last requested ID which is now very useful information.
- *
- * @usb_string_ids_n() is called from bind() callbacks to allocate
- * string IDs. Drivers for functions, configurations, or gadgets will
- * then store that ID in the appropriate descriptors and string table.
- *
- * All string identifier should be allocated using this,
- * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for
- * example different functions don't wrongly assign different meanings
- * to the same identifier.
- */
-int usb_string_ids_n(struct usb_composite_dev *c, unsigned n)
-{
- unsigned next = c->next_string_id;
- if (unlikely(n > 254 || (unsigned)next + n > 254))
- return -ENODEV;
- c->next_string_id += n;
- return next + 1;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req)
-{
- if (req->status || req->actual != req->length)
- DBG((struct usb_composite_dev *) ep->driver_data,
- "setup complete --> %d, %d/%d\n",
- req->status, req->actual, req->length);
-}
-
-/*
- * The setup() callback implements all the ep0 functionality that's
- * not handled lower down, in hardware or the hardware driver(like
- * device and endpoint feature flags, and their status). It's all
- * housekeeping for the gadget function we're implementing. Most of
- * the work is in config and function specific setup.
- */
-static int
-composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
-{
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- int status = 0;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u8 intf = w_index & 0xFF;
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
- struct usb_function *f = NULL;
- u8 endp;
-
- /* partial re-init of the response message; the function or the
- * gadget might need to intercept e.g. a control-OUT completion
- * when we delegate to it.
- */
- req->zero = 0;
- req->complete = composite_setup_complete;
- req->length = 0;
- gadget->ep0->driver_data = cdev;
-
- switch (ctrl->bRequest) {
-
- /* we handle all standard USB descriptors */
- case USB_REQ_GET_DESCRIPTOR:
- if (ctrl->bRequestType != USB_DIR_IN)
- goto unknown;
- switch (w_value >> 8) {
-
- case USB_DT_DEVICE:
- cdev->desc.bNumConfigurations =
- count_configs(cdev, USB_DT_DEVICE);
- cdev->desc.bMaxPacketSize0 =
- cdev->gadget->ep0->maxpacket;
- if (gadget_is_superspeed(gadget)) {
- if (gadget->speed >= USB_SPEED_SUPER) {
- cdev->desc.bcdUSB = cpu_to_le16(0x0300);
- cdev->desc.bMaxPacketSize0 = 9;
- } else {
- cdev->desc.bcdUSB = cpu_to_le16(0x0210);
- }
- }
-
- value = min(w_length, (u16) sizeof cdev->desc);
- memcpy(req->buf, &cdev->desc, value);
- break;
- case USB_DT_DEVICE_QUALIFIER:
- if (!gadget_is_dualspeed(gadget) ||
- gadget->speed >= USB_SPEED_SUPER)
- break;
- device_qual(cdev);
- value = min_t(int, w_length,
- sizeof(struct usb_qualifier_descriptor));
- break;
- case USB_DT_OTHER_SPEED_CONFIG:
- if (!gadget_is_dualspeed(gadget) ||
- gadget->speed >= USB_SPEED_SUPER)
- break;
- /* FALLTHROUGH */
- case USB_DT_CONFIG:
- value = config_desc(cdev, w_value);
- if (value >= 0)
- value = min(w_length, (u16) value);
- break;
- case USB_DT_STRING:
- value = get_string(cdev, req->buf,
- w_index, w_value & 0xff);
- if (value >= 0)
- value = min(w_length, (u16) value);
- break;
- case USB_DT_BOS:
- if (gadget_is_superspeed(gadget)) {
- value = bos_desc(cdev);
- value = min(w_length, (u16) value);
- }
- break;
- }
- break;
-
- /* any number of configs can work */
- case USB_REQ_SET_CONFIGURATION:
- if (ctrl->bRequestType != 0)
- goto unknown;
- if (gadget_is_otg(gadget)) {
- if (gadget->a_hnp_support)
- DBG(cdev, "HNP available\n");
- else if (gadget->a_alt_hnp_support)
- DBG(cdev, "HNP on another port\n");
- else
- VDBG(cdev, "HNP inactive\n");
- }
- spin_lock(&cdev->lock);
- value = set_config(cdev, ctrl, w_value);
- spin_unlock(&cdev->lock);
- break;
- case USB_REQ_GET_CONFIGURATION:
- if (ctrl->bRequestType != USB_DIR_IN)
- goto unknown;
- if (cdev->config)
- *(u8 *)req->buf = cdev->config->bConfigurationValue;
- else
- *(u8 *)req->buf = 0;
- value = min(w_length, (u16) 1);
- break;
-
- /* function drivers must handle get/set altsetting; if there's
- * no get() method, we know only altsetting zero works.
- */
- case USB_REQ_SET_INTERFACE:
- if (ctrl->bRequestType != USB_RECIP_INTERFACE)
- goto unknown;
- if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
- break;
- f = cdev->config->interface[intf];
- if (!f)
- break;
- if (w_value && !f->set_alt)
- break;
- value = f->set_alt(f, w_index, w_value);
- if (value == USB_GADGET_DELAYED_STATUS) {
- DBG(cdev,
- "%s: interface %d (%s) requested delayed status\n",
- __func__, intf, f->name);
- cdev->delayed_status++;
- DBG(cdev, "delayed_status count %d\n",
- cdev->delayed_status);
- }
- break;
- case USB_REQ_GET_INTERFACE:
- if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE))
- goto unknown;
- if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
- break;
- f = cdev->config->interface[intf];
- if (!f)
- break;
- /* lots of interfaces only need altsetting zero... */
- value = f->get_alt ? f->get_alt(f, w_index) : 0;
- if (value < 0)
- break;
- *((u8 *)req->buf) = value;
- value = min(w_length, (u16) 1);
- break;
-
- /*
- * USB 3.0 additions:
- * Function driver should handle get_status request. If such cb
- * wasn't supplied we respond with default value = 0
- * Note: function driver should supply such cb only for the first
- * interface of the function
- */
- case USB_REQ_GET_STATUS:
- if (!gadget_is_superspeed(gadget))
- goto unknown;
- if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE))
- goto unknown;
- value = 2; /* This is the length of the get_status reply */
- put_unaligned_le16(0, req->buf);
- if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
- break;
- f = cdev->config->interface[intf];
- if (!f)
- break;
- status = f->get_status ? f->get_status(f) : 0;
- if (status < 0)
- break;
- put_unaligned_le16(status & 0x0000ffff, req->buf);
- break;
- /*
- * Function drivers should handle SetFeature/ClearFeature
- * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied
- * only for the first interface of the function
- */
- case USB_REQ_CLEAR_FEATURE:
- case USB_REQ_SET_FEATURE:
- if (!gadget_is_superspeed(gadget))
- goto unknown;
- if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE))
- goto unknown;
- switch (w_value) {
- case USB_INTRF_FUNC_SUSPEND:
- if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
- break;
- f = cdev->config->interface[intf];
- if (!f)
- break;
- value = 0;
- if (f->func_suspend)
- value = f->func_suspend(f, w_index >> 8);
- if (value < 0) {
- ERROR(cdev,
- "func_suspend() returned error %d\n",
- value);
- value = 0;
- }
- break;
- }
- break;
- default:
-unknown:
- VDBG(cdev,
- "non-core control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
-
- /* functions always handle their interfaces and endpoints...
- * punt other recipients (other, WUSB, ...) to the current
- * configuration code.
- *
- * REVISIT it could make sense to let the composite device
- * take such requests too, if that's ever needed: to work
- * in config 0, etc.
- */
- switch (ctrl->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_INTERFACE:
- if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
- break;
- f = cdev->config->interface[intf];
- break;
-
- case USB_RECIP_ENDPOINT:
- endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f);
- list_for_each_entry(f, &cdev->config->functions, list) {
- if (test_bit(endp, f->endpoints))
- break;
- }
- if (&f->list == &cdev->config->functions)
- f = NULL;
- break;
- }
-
- if (f && f->setup)
- value = f->setup(f, ctrl);
- else {
- struct usb_configuration *c;
-
- c = cdev->config;
- if (c && c->setup)
- value = c->setup(c, ctrl);
- }
-
- goto done;
- }
-
- /* respond with data transfer before status phase? */
- if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) {
- req->length = value;
- req->zero = value < w_length;
- value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
- if (value < 0) {
- DBG(cdev, "ep_queue --> %d\n", value);
- req->status = 0;
- composite_setup_complete(gadget->ep0, req);
- }
- } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) {
- WARN(cdev,
- "%s: Delayed status not supported for w_length != 0",
- __func__);
- }
-
-done:
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-static void composite_disconnect(struct usb_gadget *gadget)
-{
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
- unsigned long flags;
-
- /* REVISIT: should we have config and device level
- * disconnect callbacks?
- */
- spin_lock_irqsave(&cdev->lock, flags);
- if (cdev->config)
- reset_config(cdev);
- if (composite->disconnect)
- composite->disconnect(cdev);
- spin_unlock_irqrestore(&cdev->lock, flags);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static ssize_t composite_show_suspended(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct usb_gadget *gadget = dev_to_usb_gadget(dev);
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
-
- return sprintf(buf, "%d\n", cdev->suspended);
-}
-
-static DEVICE_ATTR(suspended, 0444, composite_show_suspended, NULL);
-
-static void
-composite_unbind(struct usb_gadget *gadget)
-{
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
-
- /* composite_disconnect() must already have been called
- * by the underlying peripheral controller driver!
- * so there's no i/o concurrency that could affect the
- * state protected by cdev->lock.
- */
- WARN_ON(cdev->config);
-
- while (!list_empty(&cdev->configs)) {
- struct usb_configuration *c;
- c = list_first_entry(&cdev->configs,
- struct usb_configuration, list);
- remove_config(cdev, c);
- }
- if (composite->unbind)
- composite->unbind(cdev);
-
- if (cdev->req) {
- kfree(cdev->req->buf);
- usb_ep_free_request(gadget->ep0, cdev->req);
- }
- device_remove_file(&gadget->dev, &dev_attr_suspended);
- kfree(cdev);
- set_gadget_data(gadget, NULL);
- composite = NULL;
-}
-
-static u8 override_id(struct usb_composite_dev *cdev, u8 *desc)
-{
- if (!*desc) {
- int ret = usb_string_id(cdev);
- if (unlikely(ret < 0))
- WARNING(cdev, "failed to override string ID\n");
- else
- *desc = ret;
- }
-
- return *desc;
-}
-
-static int composite_bind(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct usb_composite_dev *cdev;
- int status = -ENOMEM;
-
- cdev = kzalloc(sizeof *cdev, GFP_KERNEL);
- if (!cdev)
- return status;
-
- spin_lock_init(&cdev->lock);
- cdev->gadget = gadget;
- set_gadget_data(gadget, cdev);
- INIT_LIST_HEAD(&cdev->configs);
-
- /* preallocate control response and buffer */
- cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
- if (!cdev->req)
- goto fail;
- cdev->req->buf = kmalloc(USB_BUFSIZ, GFP_KERNEL);
- if (!cdev->req->buf)
- goto fail;
- cdev->req->complete = composite_setup_complete;
- gadget->ep0->driver_data = cdev;
-
- cdev->bufsiz = USB_BUFSIZ;
- cdev->driver = composite;
-
- /*
- * As per USB compliance update, a device that is actively drawing
- * more than 100mA from USB must report itself as bus-powered in
- * the GetStatus(DEVICE) call.
- */
- if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW)
- usb_gadget_set_selfpowered(gadget);
-
- /* interface and string IDs start at zero via kzalloc.
- * we force endpoints to start unassigned; few controller
- * drivers will zero ep->driver_data.
- */
- usb_ep_autoconfig_reset(cdev->gadget);
-
- /* composite gadget needs to assign strings for whole device (like
- * serial number), register function drivers, potentially update
- * power state and consumption, etc
- */
- status = composite->bind(cdev);
- if (status < 0)
- goto fail;
-
- cdev->desc = *composite->dev;
-
- /* standardized runtime overrides for device ID data */
- if (idVendor)
- cdev->desc.idVendor = cpu_to_le16(idVendor);
- else
- idVendor = le16_to_cpu(cdev->desc.idVendor);
- if (idProduct)
- cdev->desc.idProduct = cpu_to_le16(idProduct);
- else
- idProduct = le16_to_cpu(cdev->desc.idProduct);
- if (bcdDevice)
- cdev->desc.bcdDevice = cpu_to_le16(bcdDevice);
- else
- bcdDevice = le16_to_cpu(cdev->desc.bcdDevice);
-
- /* string overrides */
- if (iManufacturer || !cdev->desc.iManufacturer) {
- if (!iManufacturer && !composite->iManufacturer &&
- !*composite_manufacturer)
- snprintf(composite_manufacturer,
- sizeof composite_manufacturer,
- "%s %s with %s",
- init_utsname()->sysname,
- init_utsname()->release,
- gadget->name);
-
- cdev->manufacturer_override =
- override_id(cdev, &cdev->desc.iManufacturer);
- }
-
- if (iProduct || (!cdev->desc.iProduct && composite->iProduct))
- cdev->product_override =
- override_id(cdev, &cdev->desc.iProduct);
-
- if (iSerialNumber ||
- (!cdev->desc.iSerialNumber && composite->iSerialNumber))
- cdev->serial_override =
- override_id(cdev, &cdev->desc.iSerialNumber);
-
- /* has userspace failed to provide a serial number? */
- if (composite->needs_serial && !cdev->desc.iSerialNumber)
- WARNING(cdev, "userspace failed to provide iSerialNumber\n");
-
- /* finish up */
- status = device_create_file(&gadget->dev, &dev_attr_suspended);
- if (status)
- goto fail;
-
- INFO(cdev, "%s ready\n", composite->name);
- return 0;
-
-fail:
- composite_unbind(gadget);
- return status;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void
-composite_suspend(struct usb_gadget *gadget)
-{
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
- struct usb_function *f;
-
- /* REVISIT: should we have config level
- * suspend/resume callbacks?
- */
- DBG(cdev, "suspend\n");
- if (cdev->config) {
- list_for_each_entry(f, &cdev->config->functions, list) {
- if (f->suspend)
- f->suspend(f);
- }
- }
- if (composite->suspend)
- composite->suspend(cdev);
-
- cdev->suspended = 1;
-
- usb_gadget_vbus_draw(gadget, 2);
-}
-
-static void
-composite_resume(struct usb_gadget *gadget)
-{
- struct usb_composite_dev *cdev = get_gadget_data(gadget);
- struct usb_function *f;
- u8 maxpower;
-
- /* REVISIT: should we have config level
- * suspend/resume callbacks?
- */
- DBG(cdev, "resume\n");
- if (composite->resume)
- composite->resume(cdev);
- if (cdev->config) {
- list_for_each_entry(f, &cdev->config->functions, list) {
- if (f->resume)
- f->resume(f);
- }
-
- maxpower = cdev->config->bMaxPower;
-
- usb_gadget_vbus_draw(gadget, maxpower ?
- (2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW);
- }
-
- cdev->suspended = 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_gadget_driver composite_driver = {
- .bind = composite_bind,
- .unbind = composite_unbind,
-
- .setup = composite_setup,
- .disconnect = composite_disconnect,
-
- .suspend = composite_suspend,
- .resume = composite_resume,
-
- .driver = {
- .owner = THIS_MODULE,
- },
-};
-
-/**
- * usb_composite_probe() - register a composite driver
- * @driver: the driver to register
- * @bind: the callback used to allocate resources that are shared across the
- * whole device, such as string IDs, and add its configurations using
- * @usb_add_config(). This may fail by returning a negative errno
- * value; it should return zero on successful initialization.
- * Context: single threaded during gadget setup
- *
- * This function is used to register drivers using the composite driver
- * framework. The return value is zero, or a negative errno value.
- * Those values normally come from the driver's @bind method, which does
- * all the work of setting up the driver to match the hardware.
- *
- * On successful return, the gadget is ready to respond to requests from
- * the host, unless one of its components invokes usb_gadget_disconnect()
- * while it was binding. That would usually be done in order to wait for
- * some userspace participation.
- */
-int usb_composite_probe(struct usb_composite_driver *driver)
-{
- if (!driver || !driver->dev || composite || !driver->bind)
- return -EINVAL;
-
- if (!driver->name)
- driver->name = "composite";
- if (!driver->iProduct)
- driver->iProduct = driver->name;
- composite_driver.function = (char *) driver->name;
- composite_driver.driver.name = driver->name;
- composite_driver.max_speed = driver->max_speed;
- composite = driver;
-
- return usb_gadget_probe_driver(&composite_driver);
-}
-
-/**
- * usb_composite_unregister() - unregister a composite driver
- * @driver: the driver to unregister
- *
- * This function is used to unregister drivers using the composite
- * driver framework.
- */
-void usb_composite_unregister(struct usb_composite_driver *driver)
-{
- if (composite != driver)
- return;
- usb_gadget_unregister_driver(&composite_driver);
-}
-
-/**
- * usb_composite_setup_continue() - Continue with the control transfer
- * @cdev: the composite device who's control transfer was kept waiting
- *
- * This function must be called by the USB function driver to continue
- * with the control transfer's data/status stage in case it had requested to
- * delay the data/status stages. A USB function's setup handler (e.g. set_alt())
- * can request the composite framework to delay the setup request's data/status
- * stages by returning USB_GADGET_DELAYED_STATUS.
- */
-void usb_composite_setup_continue(struct usb_composite_dev *cdev)
-{
- int value;
- struct usb_request *req = cdev->req;
- unsigned long flags;
-
- DBG(cdev, "%s\n", __func__);
- spin_lock_irqsave(&cdev->lock, flags);
-
- if (cdev->delayed_status == 0) {
- WARN(cdev, "%s: Unexpected call\n", __func__);
-
- } else if (--cdev->delayed_status == 0) {
- DBG(cdev, "%s: Completing delayed status\n", __func__);
- req->length = 0;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0) {
- DBG(cdev, "ep_queue --> %d\n", value);
- req->status = 0;
- composite_setup_complete(cdev->gadget->ep0, req);
- }
- }
-
- spin_unlock_irqrestore(&cdev->lock, flags);
-}
-
+++ /dev/null
-/*
- * composite.h -- framework for usb gadgets which are composite devices
- *
- * Copyright (C) 2006-2008 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef __LINUX_USB_COMPOSITE_H
-#define __LINUX_USB_COMPOSITE_H
-
-/*
- * This framework is an optional layer on top of the USB Gadget interface,
- * making it easier to build (a) Composite devices, supporting multiple
- * functions within any single configuration, and (b) Multi-configuration
- * devices, also supporting multiple functions but without necessarily
- * having more than one function per configuration.
- *
- * Example: a device with a single configuration supporting both network
- * link and mass storage functions is a composite device. Those functions
- * might alternatively be packaged in individual configurations, but in
- * the composite model the host can use both functions at the same time.
- */
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-/*
- * USB function drivers should return USB_GADGET_DELAYED_STATUS if they
- * wish to delay the data/status stages of the control transfer till they
- * are ready. The control transfer will then be kept from completing till
- * all the function drivers that requested for USB_GADGET_DELAYED_STAUS
- * invoke usb_composite_setup_continue().
- */
-#define USB_GADGET_DELAYED_STATUS 0x7fff /* Impossibly large value */
-
-struct usb_configuration;
-
-/**
- * struct usb_function - describes one function of a configuration
- * @name: For diagnostics, identifies the function.
- * @strings: tables of strings, keyed by identifiers assigned during bind()
- * and by language IDs provided in control requests
- * @descriptors: Table of full (or low) speed descriptors, using interface and
- * string identifiers assigned during @bind(). If this pointer is null,
- * the function will not be available at full speed (or at low speed).
- * @hs_descriptors: Table of high speed descriptors, using interface and
- * string identifiers assigned during @bind(). If this pointer is null,
- * the function will not be available at high speed.
- * @ss_descriptors: Table of super speed descriptors, using interface and
- * string identifiers assigned during @bind(). If this
- * pointer is null after initiation, the function will not
- * be available at super speed.
- * @config: assigned when @usb_add_function() is called; this is the
- * configuration with which this function is associated.
- * @bind: Before the gadget can register, all of its functions bind() to the
- * available resources including string and interface identifiers used
- * in interface or class descriptors; endpoints; I/O buffers; and so on.
- * @unbind: Reverses @bind; called as a side effect of unregistering the
- * driver which added this function.
- * @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
- * initialize usb_ep.driver data at this time (when it is used).
- * Note that setting an interface to its current altsetting resets
- * interface state, and that all interfaces have a disabled state.
- * @get_alt: Returns the active altsetting. If this is not provided,
- * then only altsetting zero is supported.
- * @disable: (REQUIRED) Indicates the function should be disabled. Reasons
- * include host resetting or reconfiguring the gadget, and disconnection.
- * @setup: Used for interface-specific control requests.
- * @suspend: Notifies functions when the host stops sending USB traffic.
- * @resume: Notifies functions when the host restarts USB traffic.
- * @get_status: Returns function status as a reply to
- * GetStatus() request when the recepient is Interface.
- * @func_suspend: callback to be called when
- * SetFeature(FUNCTION_SUSPEND) is reseived
- *
- * A single USB function uses one or more interfaces, and should in most
- * cases support operation at both full and high speeds. Each function is
- * associated by @usb_add_function() with a one configuration; that function
- * causes @bind() to be called so resources can be allocated as part of
- * setting up a gadget driver. Those resources include endpoints, which
- * should be allocated using @usb_ep_autoconfig().
- *
- * To support dual speed operation, a function driver provides descriptors
- * for both high and full speed operation. Except in rare cases that don't
- * involve bulk endpoints, each speed needs different endpoint descriptors.
- *
- * Function drivers choose their own strategies for managing instance data.
- * The simplest strategy just declares it "static', which means the function
- * can only be activated once. If the function needs to be exposed in more
- * than one configuration at a given speed, it needs to support multiple
- * usb_function structures (one for each configuration).
- *
- * A more complex strategy might encapsulate a @usb_function structure inside
- * a driver-specific instance structure to allows multiple activations. An
- * example of multiple activations might be a CDC ACM function that supports
- * two or more distinct instances within the same configuration, providing
- * several independent logical data links to a USB host.
- */
-struct usb_function {
- const char *name;
- struct usb_gadget_strings **strings;
- struct usb_descriptor_header **descriptors;
- struct usb_descriptor_header **hs_descriptors;
- struct usb_descriptor_header **ss_descriptors;
-
- struct usb_configuration *config;
-
- /* REVISIT: bind() functions can be marked __init, which
- * makes trouble for section mismatch analysis. See if
- * we can't restructure things to avoid mismatching.
- * Related: unbind() may kfree() but bind() won't...
- */
-
- /* configuration management: bind/unbind */
- int (*bind)(struct usb_configuration *,
- struct usb_function *);
- void (*unbind)(struct usb_configuration *,
- struct usb_function *);
-
- /* runtime state management */
- int (*set_alt)(struct usb_function *,
- unsigned interface, unsigned alt);
- int (*get_alt)(struct usb_function *,
- unsigned interface);
- void (*disable)(struct usb_function *);
- int (*setup)(struct usb_function *,
- const struct usb_ctrlrequest *);
- void (*suspend)(struct usb_function *);
- void (*resume)(struct usb_function *);
-
- /* USB 3.0 additions */
- int (*get_status)(struct usb_function *);
- int (*func_suspend)(struct usb_function *,
- u8 suspend_opt);
- /* private: */
- /* internals */
- struct list_head list;
- DECLARE_BITMAP(endpoints, 32);
-};
-
-int usb_add_function(struct usb_configuration *, struct usb_function *);
-
-int usb_function_deactivate(struct usb_function *);
-int usb_function_activate(struct usb_function *);
-
-int usb_interface_id(struct usb_configuration *, struct usb_function *);
-
-int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f,
- struct usb_ep *_ep);
-
-#define MAX_CONFIG_INTERFACES 16 /* arbitrary; max 255 */
-
-/**
- * struct usb_configuration - represents one gadget configuration
- * @label: For diagnostics, describes the configuration.
- * @strings: Tables of strings, keyed by identifiers assigned during @bind()
- * and by language IDs provided in control requests.
- * @descriptors: Table of descriptors preceding all function descriptors.
- * Examples include OTG and vendor-specific descriptors.
- * @unbind: Reverses @bind; called as a side effect of unregistering the
- * driver which added this configuration.
- * @setup: Used to delegate control requests that aren't handled by standard
- * device infrastructure or directed at a specific interface.
- * @bConfigurationValue: Copied into configuration descriptor.
- * @iConfiguration: Copied into configuration descriptor.
- * @bmAttributes: Copied into configuration descriptor.
- * @bMaxPower: Copied into configuration descriptor.
- * @cdev: assigned by @usb_add_config() before calling @bind(); this is
- * the device associated with this configuration.
- *
- * Configurations are building blocks for gadget drivers structured around
- * function drivers. Simple USB gadgets require only one function and one
- * configuration, and handle dual-speed hardware by always providing the same
- * functionality. Slightly more complex gadgets may have more than one
- * single-function configuration at a given speed; or have configurations
- * that only work at one speed.
- *
- * Composite devices are, by definition, ones with configurations which
- * include more than one function.
- *
- * The lifecycle of a usb_configuration includes allocation, initialization
- * of the fields described above, and calling @usb_add_config() to set up
- * internal data and bind it to a specific device. The configuration's
- * @bind() method is then used to initialize all the functions and then
- * call @usb_add_function() for them.
- *
- * Those functions would normally be independent of each other, but that's
- * not mandatory. CDC WMC devices are an example where functions often
- * depend on other functions, with some functions subsidiary to others.
- * Such interdependency may be managed in any way, so long as all of the
- * descriptors complete by the time the composite driver returns from
- * its bind() routine.
- */
-struct usb_configuration {
- const char *label;
- struct usb_gadget_strings **strings;
- const struct usb_descriptor_header **descriptors;
-
- /* REVISIT: bind() functions can be marked __init, which
- * makes trouble for section mismatch analysis. See if
- * we can't restructure things to avoid mismatching...
- */
-
- /* configuration management: unbind/setup */
- void (*unbind)(struct usb_configuration *);
- int (*setup)(struct usb_configuration *,
- const struct usb_ctrlrequest *);
-
- /* fields in the config descriptor */
- u8 bConfigurationValue;
- u8 iConfiguration;
- u8 bmAttributes;
- u8 bMaxPower;
-
- struct usb_composite_dev *cdev;
-
- /* private: */
- /* internals */
- struct list_head list;
- struct list_head functions;
- u8 next_interface_id;
- unsigned superspeed:1;
- unsigned highspeed:1;
- unsigned fullspeed:1;
- struct usb_function *interface[MAX_CONFIG_INTERFACES];
-};
-
-int usb_add_config(struct usb_composite_dev *,
- struct usb_configuration *,
- int (*)(struct usb_configuration *));
-
-void usb_remove_config(struct usb_composite_dev *,
- struct usb_configuration *);
-
-/**
- * struct usb_composite_driver - groups configurations into a gadget
- * @name: For diagnostics, identifies the driver.
- * @iProduct: Used as iProduct override if @dev->iProduct is not set.
- * If NULL value of @name is taken.
- * @iManufacturer: Used as iManufacturer override if @dev->iManufacturer is
- * not set. If NULL a default "<system> <release> with <udc>" value
- * will be used.
- * @iSerialNumber: Used as iSerialNumber override if @dev->iSerialNumber is
- * not set.
- * @dev: Template descriptor for the device, including default device
- * identifiers.
- * @strings: tables of strings, keyed by identifiers assigned during @bind
- * and language IDs provided in control requests
- * @max_speed: Highest speed the driver supports.
- * @needs_serial: set to 1 if the gadget needs userspace to provide
- * a serial number. If one is not provided, warning will be printed.
- * @bind: (REQUIRED) Used to allocate resources that are shared across the
- * whole device, such as string IDs, and add its configurations using
- * @usb_add_config(). This may fail by returning a negative errno
- * value; it should return zero on successful initialization.
- * @unbind: Reverses @bind; called as a side effect of unregistering
- * this driver.
- * @disconnect: optional driver disconnect method
- * @suspend: Notifies when the host stops sending USB traffic,
- * after function notifications
- * @resume: Notifies configuration when the host restarts USB traffic,
- * before function notifications
- *
- * Devices default to reporting self powered operation. Devices which rely
- * on bus powered operation should report this in their @bind method.
- *
- * Before returning from @bind, various fields in the template descriptor
- * may be overridden. These include the idVendor/idProduct/bcdDevice values
- * normally to bind the appropriate host side driver, and the three strings
- * (iManufacturer, iProduct, iSerialNumber) normally used to provide user
- * meaningful device identifiers. (The strings will not be defined unless
- * they are defined in @dev and @strings.) The correct ep0 maxpacket size
- * is also reported, as defined by the underlying controller driver.
- */
-struct usb_composite_driver {
- const char *name;
- const char *iProduct;
- const char *iManufacturer;
- const char *iSerialNumber;
- const struct usb_device_descriptor *dev;
- struct usb_gadget_strings **strings;
- enum usb_device_speed max_speed;
- unsigned needs_serial:1;
-
- int (*bind)(struct usb_composite_dev *cdev);
- int (*unbind)(struct usb_composite_dev *);
-
- void (*disconnect)(struct usb_composite_dev *);
-
- /* global suspend hooks */
- void (*suspend)(struct usb_composite_dev *);
- void (*resume)(struct usb_composite_dev *);
-};
-
-extern int usb_composite_probe(struct usb_composite_driver *driver);
-extern void usb_composite_unregister(struct usb_composite_driver *driver);
-extern void usb_composite_setup_continue(struct usb_composite_dev *cdev);
-
-
-/**
- * struct usb_composite_device - represents one composite usb gadget
- * @gadget: read-only, abstracts the gadget's usb peripheral controller
- * @req: used for control responses; buffer is pre-allocated
- * @bufsiz: size of buffer pre-allocated in @req
- * @config: the currently active configuration
- *
- * One of these devices is allocated and initialized before the
- * associated device driver's bind() is called.
- *
- * OPEN ISSUE: it appears that some WUSB devices will need to be
- * built by combining a normal (wired) gadget with a wireless one.
- * This revision of the gadget framework should probably try to make
- * sure doing that won't hurt too much.
- *
- * One notion for how to handle Wireless USB devices involves:
- * (a) a second gadget here, discovery mechanism TBD, but likely
- * needing separate "register/unregister WUSB gadget" calls;
- * (b) updates to usb_gadget to include flags "is it wireless",
- * "is it wired", plus (presumably in a wrapper structure)
- * bandgroup and PHY info;
- * (c) presumably a wireless_ep wrapping a usb_ep, and reporting
- * wireless-specific parameters like maxburst and maxsequence;
- * (d) configurations that are specific to wireless links;
- * (e) function drivers that understand wireless configs and will
- * support wireless for (additional) function instances;
- * (f) a function to support association setup (like CBAF), not
- * necessarily requiring a wireless adapter;
- * (g) composite device setup that can create one or more wireless
- * configs, including appropriate association setup support;
- * (h) more, TBD.
- */
-struct usb_composite_dev {
- struct usb_gadget *gadget;
- struct usb_request *req;
- unsigned bufsiz;
-
- struct usb_configuration *config;
-
- /* private: */
- /* internals */
- unsigned int suspended:1;
- struct usb_device_descriptor desc;
- struct list_head configs;
- struct usb_composite_driver *driver;
- u8 next_string_id;
- u8 manufacturer_override;
- u8 product_override;
- u8 serial_override;
-
- /* the gadget driver won't enable the data pullup
- * while the deactivation count is nonzero.
- */
- unsigned deactivations;
-
- /* the composite driver won't complete the control transfer's
- * data/status stages till delayed_status is zero.
- */
- int delayed_status;
-
- /* protects deactivations and delayed_status counts*/
- spinlock_t lock;
-};
-
-extern int usb_string_id(struct usb_composite_dev *c);
-extern int usb_string_ids_tab(struct usb_composite_dev *c,
- struct usb_string *str);
-extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n);
-
-
-/* messaging utils */
-#define DBG(d, fmt, args...) \
- dev_dbg(&(d)->gadget->dev , fmt , ## args)
-#define VDBG(d, fmt, args...) \
- dev_vdbg(&(d)->gadget->dev , fmt , ## args)
-#define ERROR(d, fmt, args...) \
- dev_err(&(d)->gadget->dev , fmt , ## args)
-#define WARNING(d, fmt, args...) \
- dev_warn(&(d)->gadget->dev , fmt , ## args)
-#define INFO(d, fmt, args...) \
- dev_info(&(d)->gadget->dev , fmt , ## args)
-
-#endif /* __LINUX_USB_COMPOSITE_H */
+++ /dev/null
-/*
- * usb/gadget/config.c -- simplify building config descriptors
- *
- * Copyright (C) 2003 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/string.h>
-#include <linux/device.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-
-/**
- * usb_descriptor_fillbuf - fill buffer with descriptors
- * @buf: Buffer to be filled
- * @buflen: Size of buf
- * @src: Array of descriptor pointers, terminated by null pointer.
- *
- * Copies descriptors into the buffer, returning the length or a
- * negative error code if they can't all be copied. Useful when
- * assembling descriptors for an associated set of interfaces used
- * as part of configuring a composite device; or in other cases where
- * sets of descriptors need to be marshaled.
- */
-int
-usb_descriptor_fillbuf(void *buf, unsigned buflen,
- const struct usb_descriptor_header **src)
-{
- u8 *dest = buf;
-
- if (!src)
- return -EINVAL;
-
- /* fill buffer from src[] until null descriptor ptr */
- for (; NULL != *src; src++) {
- unsigned len = (*src)->bLength;
-
- if (len > buflen)
- return -EINVAL;
- memcpy(dest, *src, len);
- buflen -= len;
- dest += len;
- }
- return dest - (u8 *)buf;
-}
-
-
-/**
- * usb_gadget_config_buf - builts a complete configuration descriptor
- * @config: Header for the descriptor, including characteristics such
- * as power requirements and number of interfaces.
- * @desc: Null-terminated vector of pointers to the descriptors (interface,
- * endpoint, etc) defining all functions in this device configuration.
- * @buf: Buffer for the resulting configuration descriptor.
- * @length: Length of buffer. If this is not big enough to hold the
- * entire configuration descriptor, an error code will be returned.
- *
- * This copies descriptors into the response buffer, building a descriptor
- * for that configuration. It returns the buffer length or a negative
- * status code. The config.wTotalLength field is set to match the length
- * of the result, but other descriptor fields (including power usage and
- * interface count) must be set by the caller.
- *
- * Gadget drivers could use this when constructing a config descriptor
- * in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
- * resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
- */
-int usb_gadget_config_buf(
- const struct usb_config_descriptor *config,
- void *buf,
- unsigned length,
- const struct usb_descriptor_header **desc
-)
-{
- struct usb_config_descriptor *cp = buf;
- int len;
-
- /* config descriptor first */
- if (length < USB_DT_CONFIG_SIZE || !desc)
- return -EINVAL;
- *cp = *config;
-
- /* then interface/endpoint/class/vendor/... */
- len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8*)buf,
- length - USB_DT_CONFIG_SIZE, desc);
- if (len < 0)
- return len;
- len += USB_DT_CONFIG_SIZE;
- if (len > 0xffff)
- return -EINVAL;
-
- /* patch up the config descriptor */
- cp->bLength = USB_DT_CONFIG_SIZE;
- cp->bDescriptorType = USB_DT_CONFIG;
- cp->wTotalLength = cpu_to_le16(len);
- cp->bmAttributes |= USB_CONFIG_ATT_ONE;
- return len;
-}
-
-/**
- * usb_copy_descriptors - copy a vector of USB descriptors
- * @src: null-terminated vector to copy
- * Context: initialization code, which may sleep
- *
- * This makes a copy of a vector of USB descriptors. Its primary use
- * is to support usb_function objects which can have multiple copies,
- * each needing different descriptors. Functions may have static
- * tables of descriptors, which are used as templates and customized
- * with identifiers (for interfaces, strings, endpoints, and more)
- * as needed by a given function instance.
- */
-struct usb_descriptor_header **
-usb_copy_descriptors(struct usb_descriptor_header **src)
-{
- struct usb_descriptor_header **tmp;
- unsigned bytes;
- unsigned n_desc;
- void *mem;
- struct usb_descriptor_header **ret;
-
- /* count descriptors and their sizes; then add vector size */
- for (bytes = 0, n_desc = 0, tmp = src; *tmp; tmp++, n_desc++)
- bytes += (*tmp)->bLength;
- bytes += (n_desc + 1) * sizeof(*tmp);
-
- mem = kmalloc(bytes, GFP_KERNEL);
- if (!mem)
- return NULL;
-
- /* fill in pointers starting at "tmp",
- * to descriptors copied starting at "mem";
- * and return "ret"
- */
- tmp = mem;
- ret = mem;
- mem += (n_desc + 1) * sizeof(*tmp);
- while (*src) {
- memcpy(mem, *src, (*src)->bLength);
- *tmp = mem;
- tmp++;
- mem += (*src)->bLength;
- src++;
- }
- *tmp = NULL;
-
- return ret;
-}
-
+++ /dev/null
-/*
- * epautoconf.c -- endpoint autoconfiguration for usb gadget drivers
- *
- * Copyright (C) 2004 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/device.h>
-
-#include <linux/ctype.h>
-#include <linux/string.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-#include "gadget_chips.h"
-
-
-/* we must assign addresses for configurable endpoints (like net2280) */
-static unsigned epnum;
-
-// #define MANY_ENDPOINTS
-#ifdef MANY_ENDPOINTS
-/* more than 15 configurable endpoints */
-static unsigned in_epnum;
-#endif
-
-
-/*
- * This should work with endpoints from controller drivers sharing the
- * same endpoint naming convention. By example:
- *
- * - ep1, ep2, ... address is fixed, not direction or type
- * - ep1in, ep2out, ... address and direction are fixed, not type
- * - ep1-bulk, ep2-bulk, ... address and type are fixed, not direction
- * - ep1in-bulk, ep2out-iso, ... all three are fixed
- * - ep-* ... no functionality restrictions
- *
- * Type suffixes are "-bulk", "-iso", or "-int". Numbers are decimal.
- * Less common restrictions are implied by gadget_is_*().
- *
- * NOTE: each endpoint is unidirectional, as specified by its USB
- * descriptor; and isn't specific to a configuration or altsetting.
- */
-static int
-ep_matches (
- struct usb_gadget *gadget,
- struct usb_ep *ep,
- struct usb_endpoint_descriptor *desc,
- struct usb_ss_ep_comp_descriptor *ep_comp
-)
-{
- u8 type;
- const char *tmp;
- u16 max;
-
- int num_req_streams = 0;
-
- /* endpoint already claimed? */
- if (NULL != ep->driver_data)
- return 0;
-
- /* only support ep0 for portable CONTROL traffic */
- type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
- if (USB_ENDPOINT_XFER_CONTROL == type)
- return 0;
-
- /* some other naming convention */
- if ('e' != ep->name[0])
- return 0;
-
- /* type-restriction: "-iso", "-bulk", or "-int".
- * direction-restriction: "in", "out".
- */
- if ('-' != ep->name[2]) {
- tmp = strrchr (ep->name, '-');
- if (tmp) {
- switch (type) {
- case USB_ENDPOINT_XFER_INT:
- /* bulk endpoints handle interrupt transfers,
- * except the toggle-quirky iso-synch kind
- */
- if ('s' == tmp[2]) // == "-iso"
- return 0;
- /* for now, avoid PXA "interrupt-in";
- * it's documented as never using DATA1.
- */
- if (gadget_is_pxa (gadget)
- && 'i' == tmp [1])
- return 0;
- break;
- case USB_ENDPOINT_XFER_BULK:
- if ('b' != tmp[1]) // != "-bulk"
- return 0;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- if ('s' != tmp[2]) // != "-iso"
- return 0;
- }
- } else {
- tmp = ep->name + strlen (ep->name);
- }
-
- /* direction-restriction: "..in-..", "out-.." */
- tmp--;
- if (!isdigit (*tmp)) {
- if (desc->bEndpointAddress & USB_DIR_IN) {
- if ('n' != *tmp)
- return 0;
- } else {
- if ('t' != *tmp)
- return 0;
- }
- }
- }
-
- /*
- * Get the number of required streams from the EP companion
- * descriptor and see if the EP matches it
- */
- if (usb_endpoint_xfer_bulk(desc)) {
- if (ep_comp && gadget->max_speed >= USB_SPEED_SUPER) {
- num_req_streams = ep_comp->bmAttributes & 0x1f;
- if (num_req_streams > ep->max_streams)
- return 0;
- }
-
- }
-
- /*
- * If the protocol driver hasn't yet decided on wMaxPacketSize
- * and wants to know the maximum possible, provide the info.
- */
- if (desc->wMaxPacketSize == 0)
- desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket);
-
- /* endpoint maxpacket size is an input parameter, except for bulk
- * where it's an output parameter representing the full speed limit.
- * the usb spec fixes high speed bulk maxpacket at 512 bytes.
- */
- max = 0x7ff & usb_endpoint_maxp(desc);
- switch (type) {
- case USB_ENDPOINT_XFER_INT:
- /* INT: limit 64 bytes full speed, 1024 high/super speed */
- if (!gadget_is_dualspeed(gadget) && max > 64)
- return 0;
- /* FALLTHROUGH */
-
- case USB_ENDPOINT_XFER_ISOC:
- /* ISO: limit 1023 bytes full speed, 1024 high/super speed */
- if (ep->maxpacket < max)
- return 0;
- if (!gadget_is_dualspeed(gadget) && max > 1023)
- return 0;
-
- /* BOTH: "high bandwidth" works only at high speed */
- if ((desc->wMaxPacketSize & cpu_to_le16(3<<11))) {
- if (!gadget_is_dualspeed(gadget))
- return 0;
- /* configure your hardware with enough buffering!! */
- }
- break;
- }
-
- /* MATCH!! */
-
- /* report address */
- desc->bEndpointAddress &= USB_DIR_IN;
- if (isdigit (ep->name [2])) {
- u8 num = simple_strtoul (&ep->name [2], NULL, 10);
- desc->bEndpointAddress |= num;
-#ifdef MANY_ENDPOINTS
- } else if (desc->bEndpointAddress & USB_DIR_IN) {
- if (++in_epnum > 15)
- return 0;
- desc->bEndpointAddress = USB_DIR_IN | in_epnum;
-#endif
- } else {
- if (++epnum > 15)
- return 0;
- desc->bEndpointAddress |= epnum;
- }
-
- /* report (variable) full speed bulk maxpacket */
- if ((USB_ENDPOINT_XFER_BULK == type) && !ep_comp) {
- int size = ep->maxpacket;
-
- /* min() doesn't work on bitfields with gcc-3.5 */
- if (size > 64)
- size = 64;
- desc->wMaxPacketSize = cpu_to_le16(size);
- }
- ep->address = desc->bEndpointAddress;
- return 1;
-}
-
-static struct usb_ep *
-find_ep (struct usb_gadget *gadget, const char *name)
-{
- struct usb_ep *ep;
-
- list_for_each_entry (ep, &gadget->ep_list, ep_list) {
- if (0 == strcmp (ep->name, name))
- return ep;
- }
- return NULL;
-}
-
-/**
- * usb_ep_autoconfig_ss() - choose an endpoint matching the ep
- * descriptor and ep companion descriptor
- * @gadget: The device to which the endpoint must belong.
- * @desc: Endpoint descriptor, with endpoint direction and transfer mode
- * initialized. For periodic transfers, the maximum packet
- * size must also be initialized. This is modified on
- * success.
- * @ep_comp: Endpoint companion descriptor, with the required
- * number of streams. Will be modified when the chosen EP
- * supports a different number of streams.
- *
- * This routine replaces the usb_ep_autoconfig when needed
- * superspeed enhancments. If such enhancemnets are required,
- * the FD should call usb_ep_autoconfig_ss directly and provide
- * the additional ep_comp parameter.
- *
- * By choosing an endpoint to use with the specified descriptor,
- * this routine simplifies writing gadget drivers that work with
- * multiple USB device controllers. The endpoint would be
- * passed later to usb_ep_enable(), along with some descriptor.
- *
- * That second descriptor won't always be the same as the first one.
- * For example, isochronous endpoints can be autoconfigured for high
- * bandwidth, and then used in several lower bandwidth altsettings.
- * Also, high and full speed descriptors will be different.
- *
- * Be sure to examine and test the results of autoconfiguration
- * on your hardware. This code may not make the best choices
- * about how to use the USB controller, and it can't know all
- * the restrictions that may apply. Some combinations of driver
- * and hardware won't be able to autoconfigure.
- *
- * On success, this returns an un-claimed usb_ep, and modifies the endpoint
- * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
- * is initialized as if the endpoint were used at full speed and
- * the bmAttribute field in the ep companion descriptor is
- * updated with the assigned number of streams if it is
- * different from the original value. To prevent the endpoint
- * from being returned by a later autoconfig call, claim it by
- * assigning ep->driver_data to some non-null value.
- *
- * On failure, this returns a null endpoint descriptor.
- */
-struct usb_ep *usb_ep_autoconfig_ss(
- struct usb_gadget *gadget,
- struct usb_endpoint_descriptor *desc,
- struct usb_ss_ep_comp_descriptor *ep_comp
-)
-{
- struct usb_ep *ep;
- u8 type;
-
- type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
-
- /* First, apply chip-specific "best usage" knowledge.
- * This might make a good usb_gadget_ops hook ...
- */
- if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) {
- /* ep-e, ep-f are PIO with only 64 byte fifos */
- ep = find_ep (gadget, "ep-e");
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
- ep = find_ep (gadget, "ep-f");
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
-
- } else if (gadget_is_goku (gadget)) {
- if (USB_ENDPOINT_XFER_INT == type) {
- /* single buffering is enough */
- ep = find_ep(gadget, "ep3-bulk");
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
- } else if (USB_ENDPOINT_XFER_BULK == type
- && (USB_DIR_IN & desc->bEndpointAddress)) {
- /* DMA may be available */
- ep = find_ep(gadget, "ep2-bulk");
- if (ep && ep_matches(gadget, ep, desc,
- ep_comp))
- goto found_ep;
- }
-
-#ifdef CONFIG_BLACKFIN
- } else if (gadget_is_musbhdrc(gadget)) {
- if ((USB_ENDPOINT_XFER_BULK == type) ||
- (USB_ENDPOINT_XFER_ISOC == type)) {
- if (USB_DIR_IN & desc->bEndpointAddress)
- ep = find_ep (gadget, "ep5in");
- else
- ep = find_ep (gadget, "ep6out");
- } else if (USB_ENDPOINT_XFER_INT == type) {
- if (USB_DIR_IN & desc->bEndpointAddress)
- ep = find_ep(gadget, "ep1in");
- else
- ep = find_ep(gadget, "ep2out");
- } else
- ep = NULL;
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
-#endif
- }
-
- /* Second, look at endpoints until an unclaimed one looks usable */
- list_for_each_entry (ep, &gadget->ep_list, ep_list) {
- if (ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
- }
-
- /* Fail */
- return NULL;
-found_ep:
- ep->desc = NULL;
- ep->comp_desc = NULL;
- return ep;
-}
-
-/**
- * usb_ep_autoconfig() - choose an endpoint matching the
- * descriptor
- * @gadget: The device to which the endpoint must belong.
- * @desc: Endpoint descriptor, with endpoint direction and transfer mode
- * initialized. For periodic transfers, the maximum packet
- * size must also be initialized. This is modified on success.
- *
- * By choosing an endpoint to use with the specified descriptor, this
- * routine simplifies writing gadget drivers that work with multiple
- * USB device controllers. The endpoint would be passed later to
- * usb_ep_enable(), along with some descriptor.
- *
- * That second descriptor won't always be the same as the first one.
- * For example, isochronous endpoints can be autoconfigured for high
- * bandwidth, and then used in several lower bandwidth altsettings.
- * Also, high and full speed descriptors will be different.
- *
- * Be sure to examine and test the results of autoconfiguration on your
- * hardware. This code may not make the best choices about how to use the
- * USB controller, and it can't know all the restrictions that may apply.
- * Some combinations of driver and hardware won't be able to autoconfigure.
- *
- * On success, this returns an un-claimed usb_ep, and modifies the endpoint
- * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
- * is initialized as if the endpoint were used at full speed. To prevent
- * the endpoint from being returned by a later autoconfig call, claim it
- * by assigning ep->driver_data to some non-null value.
- *
- * On failure, this returns a null endpoint descriptor.
- */
-struct usb_ep *usb_ep_autoconfig(
- struct usb_gadget *gadget,
- struct usb_endpoint_descriptor *desc
-)
-{
- return usb_ep_autoconfig_ss(gadget, desc, NULL);
-}
-
-
-/**
- * usb_ep_autoconfig_reset - reset endpoint autoconfig state
- * @gadget: device for which autoconfig state will be reset
- *
- * Use this for devices where one configuration may need to assign
- * endpoint resources very differently from the next one. It clears
- * state such as ep->driver_data and the record of assigned endpoints
- * used by usb_ep_autoconfig().
- */
-void usb_ep_autoconfig_reset (struct usb_gadget *gadget)
-{
- struct usb_ep *ep;
-
- list_for_each_entry (ep, &gadget->ep_list, ep_list) {
- ep->driver_data = NULL;
- }
-#ifdef MANY_ENDPOINTS
- in_epnum = 0;
-#endif
- epnum = 0;
-}
-
+++ /dev/null
-/*
- * f_acm.c -- USB CDC serial (ACM) function driver
- *
- * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
- * Copyright (C) 2008 by David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- * Copyright (C) 2009 by Samsung Electronics
- * Author: Michal Nazarewicz (mina86@mina86.com)
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-
-#include "u_serial.h"
-#include "gadget_chips.h"
-
-
-/*
- * This CDC ACM function support just wraps control functions and
- * notifications around the generic serial-over-usb code.
- *
- * Because CDC ACM is standardized by the USB-IF, many host operating
- * systems have drivers for it. Accordingly, ACM is the preferred
- * interop solution for serial-port type connections. The control
- * models are often not necessary, and in any case don't do much in
- * this bare-bones implementation.
- *
- * Note that even MS-Windows has some support for ACM. However, that
- * support is somewhat broken because when you use ACM in a composite
- * device, having multiple interfaces confuses the poor OS. It doesn't
- * seem to understand CDC Union descriptors. The new "association"
- * descriptors (roughly equivalent to CDC Unions) may sometimes help.
- */
-
-struct f_acm {
- struct gserial port;
- u8 ctrl_id, data_id;
- u8 port_num;
-
- u8 pending;
-
- /* lock is mostly for pending and notify_req ... they get accessed
- * by callbacks both from tty (open/close/break) under its spinlock,
- * and notify_req.complete() which can't use that lock.
- */
- spinlock_t lock;
-
- struct usb_ep *notify;
- struct usb_request *notify_req;
-
- struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
-
- /* SetControlLineState request -- CDC 1.1 section 6.2.14 (INPUT) */
- u16 port_handshake_bits;
-#define ACM_CTRL_RTS (1 << 1) /* unused with full duplex */
-#define ACM_CTRL_DTR (1 << 0) /* host is ready for data r/w */
-
- /* SerialState notification -- CDC 1.1 section 6.3.5 (OUTPUT) */
- u16 serial_state;
-#define ACM_CTRL_OVERRUN (1 << 6)
-#define ACM_CTRL_PARITY (1 << 5)
-#define ACM_CTRL_FRAMING (1 << 4)
-#define ACM_CTRL_RI (1 << 3)
-#define ACM_CTRL_BRK (1 << 2)
-#define ACM_CTRL_DSR (1 << 1)
-#define ACM_CTRL_DCD (1 << 0)
-};
-
-static inline struct f_acm *func_to_acm(struct usb_function *f)
-{
- return container_of(f, struct f_acm, port.func);
-}
-
-static inline struct f_acm *port_to_acm(struct gserial *p)
-{
- return container_of(p, struct f_acm, port);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* notification endpoint uses smallish and infrequent fixed-size messages */
-
-#define GS_LOG2_NOTIFY_INTERVAL 5 /* 1 << 5 == 32 msec */
-#define GS_NOTIFY_MAXPACKET 10 /* notification + 2 bytes */
-
-/* interface and class descriptors: */
-
-static struct usb_interface_assoc_descriptor
-acm_iad_descriptor = {
- .bLength = sizeof acm_iad_descriptor,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- /* .bFirstInterface = DYNAMIC, */
- .bInterfaceCount = 2, // control + data
- .bFunctionClass = USB_CLASS_COMM,
- .bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
- .bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
- /* .iFunction = DYNAMIC */
-};
-
-
-static struct usb_interface_descriptor acm_control_interface_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
- .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_interface_descriptor acm_data_interface_desc = {
- .bLength = USB_DT_INTERFACE_SIZE,
- .bDescriptorType = USB_DT_INTERFACE,
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc acm_header_desc = {
- .bLength = sizeof(acm_header_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_call_mgmt_descriptor
-acm_call_mgmt_descriptor = {
- .bLength = sizeof(acm_call_mgmt_descriptor),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
- .bmCapabilities = 0,
- /* .bDataInterface = DYNAMIC */
-};
-
-static struct usb_cdc_acm_descriptor acm_descriptor = {
- .bLength = sizeof(acm_descriptor),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ACM_TYPE,
- .bmCapabilities = USB_CDC_CAP_LINE,
-};
-
-static struct usb_cdc_union_desc acm_union_desc = {
- .bLength = sizeof(acm_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- /* .bMasterInterface0 = DYNAMIC */
- /* .bSlaveInterface0 = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor acm_fs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
- .bInterval = 1 << GS_LOG2_NOTIFY_INTERVAL,
-};
-
-static struct usb_endpoint_descriptor acm_fs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor acm_fs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *acm_fs_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_fs_notify_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_fs_in_desc,
- (struct usb_descriptor_header *) &acm_fs_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor acm_hs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
- .bInterval = GS_LOG2_NOTIFY_INTERVAL+4,
-};
-
-static struct usb_endpoint_descriptor acm_hs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor acm_hs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *acm_hs_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_hs_notify_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_hs_in_desc,
- (struct usb_descriptor_header *) &acm_hs_out_desc,
- NULL,
-};
-
-static struct usb_endpoint_descriptor acm_ss_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor acm_ss_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor acm_ss_bulk_comp_desc = {
- .bLength = sizeof acm_ss_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-};
-
-static struct usb_descriptor_header *acm_ss_function[] = {
- (struct usb_descriptor_header *) &acm_iad_descriptor,
- (struct usb_descriptor_header *) &acm_control_interface_desc,
- (struct usb_descriptor_header *) &acm_header_desc,
- (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
- (struct usb_descriptor_header *) &acm_descriptor,
- (struct usb_descriptor_header *) &acm_union_desc,
- (struct usb_descriptor_header *) &acm_hs_notify_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &acm_data_interface_desc,
- (struct usb_descriptor_header *) &acm_ss_in_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &acm_ss_out_desc,
- (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-#define ACM_CTRL_IDX 0
-#define ACM_DATA_IDX 1
-#define ACM_IAD_IDX 2
-
-/* static strings, in UTF-8 */
-static struct usb_string acm_string_defs[] = {
- [ACM_CTRL_IDX].s = "CDC Abstract Control Model (ACM)",
- [ACM_DATA_IDX].s = "CDC ACM Data",
- [ACM_IAD_IDX ].s = "CDC Serial",
- { /* ZEROES END LIST */ },
-};
-
-static struct usb_gadget_strings acm_string_table = {
- .language = 0x0409, /* en-us */
- .strings = acm_string_defs,
-};
-
-static struct usb_gadget_strings *acm_strings[] = {
- &acm_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-/* ACM control ... data handling is delegated to tty library code.
- * The main task of this function is to activate and deactivate
- * that code based on device state; track parameters like line
- * speed, handshake state, and so on; and issue notifications.
- */
-
-static void acm_complete_set_line_coding(struct usb_ep *ep,
- struct usb_request *req)
-{
- struct f_acm *acm = ep->driver_data;
- struct usb_composite_dev *cdev = acm->port.func.config->cdev;
-
- if (req->status != 0) {
- DBG(cdev, "acm ttyGS%d completion, err %d\n",
- acm->port_num, req->status);
- return;
- }
-
- /* normal completion */
- if (req->actual != sizeof(acm->port_line_coding)) {
- DBG(cdev, "acm ttyGS%d short resp, len %d\n",
- acm->port_num, req->actual);
- usb_ep_set_halt(ep);
- } else {
- struct usb_cdc_line_coding *value = req->buf;
-
- /* REVISIT: we currently just remember this data.
- * If we change that, (a) validate it first, then
- * (b) update whatever hardware needs updating,
- * (c) worry about locking. This is information on
- * the order of 9600-8-N-1 ... most of which means
- * nothing unless we control a real RS232 line.
- */
- acm->port_line_coding = *value;
- }
-}
-
-static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct f_acm *acm = func_to_acm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /* composite driver infrastructure handles everything except
- * CDC class messages; interface activation uses set_alt().
- *
- * Note CDC spec table 4 lists the ACM request profile. It requires
- * encapsulated command support ... we don't handle any, and respond
- * to them by stalling. Options include get/set/clear comm features
- * (not that useful) and SEND_BREAK.
- */
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
-
- /* SET_LINE_CODING ... just read and save what the host sends */
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_REQ_SET_LINE_CODING:
- if (w_length != sizeof(struct usb_cdc_line_coding)
- || w_index != acm->ctrl_id)
- goto invalid;
-
- value = w_length;
- cdev->gadget->ep0->driver_data = acm;
- req->complete = acm_complete_set_line_coding;
- break;
-
- /* GET_LINE_CODING ... return what host sent, or initial value */
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_REQ_GET_LINE_CODING:
- if (w_index != acm->ctrl_id)
- goto invalid;
-
- value = min_t(unsigned, w_length,
- sizeof(struct usb_cdc_line_coding));
- memcpy(req->buf, &acm->port_line_coding, value);
- break;
-
- /* SET_CONTROL_LINE_STATE ... save what the host sent */
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_REQ_SET_CONTROL_LINE_STATE:
- if (w_index != acm->ctrl_id)
- goto invalid;
-
- value = 0;
-
- /* FIXME we should not allow data to flow until the
- * host sets the ACM_CTRL_DTR bit; and when it clears
- * that bit, we should return to that no-flow state.
- */
- acm->port_handshake_bits = w_value;
- break;
-
- default:
-invalid:
- VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "acm ttyGS%d req%02x.%02x v%04x i%04x l%d\n",
- acm->port_num, ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = 0;
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "acm response on ttyGS%d, err %d\n",
- acm->port_num, value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_acm *acm = func_to_acm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* we know alt == 0, so this is an activation or a reset */
-
- if (intf == acm->ctrl_id) {
- if (acm->notify->driver_data) {
- VDBG(cdev, "reset acm control interface %d\n", intf);
- usb_ep_disable(acm->notify);
- } else {
- VDBG(cdev, "init acm ctrl interface %d\n", intf);
- if (config_ep_by_speed(cdev->gadget, f, acm->notify))
- return -EINVAL;
- }
- usb_ep_enable(acm->notify);
- acm->notify->driver_data = acm;
-
- } else if (intf == acm->data_id) {
- if (acm->port.in->driver_data) {
- DBG(cdev, "reset acm ttyGS%d\n", acm->port_num);
- gserial_disconnect(&acm->port);
- }
- if (!acm->port.in->desc || !acm->port.out->desc) {
- DBG(cdev, "activate acm ttyGS%d\n", acm->port_num);
- if (config_ep_by_speed(cdev->gadget, f,
- acm->port.in) ||
- config_ep_by_speed(cdev->gadget, f,
- acm->port.out)) {
- acm->port.in->desc = NULL;
- acm->port.out->desc = NULL;
- return -EINVAL;
- }
- }
- gserial_connect(&acm->port, acm->port_num);
-
- } else
- return -EINVAL;
-
- return 0;
-}
-
-static void acm_disable(struct usb_function *f)
-{
- struct f_acm *acm = func_to_acm(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- DBG(cdev, "acm ttyGS%d deactivated\n", acm->port_num);
- gserial_disconnect(&acm->port);
- usb_ep_disable(acm->notify);
- acm->notify->driver_data = NULL;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/**
- * acm_cdc_notify - issue CDC notification to host
- * @acm: wraps host to be notified
- * @type: notification type
- * @value: Refer to cdc specs, wValue field.
- * @data: data to be sent
- * @length: size of data
- * Context: irqs blocked, acm->lock held, acm_notify_req non-null
- *
- * Returns zero on success or a negative errno.
- *
- * See section 6.3.5 of the CDC 1.1 specification for information
- * about the only notification we issue: SerialState change.
- */
-static int acm_cdc_notify(struct f_acm *acm, u8 type, u16 value,
- void *data, unsigned length)
-{
- struct usb_ep *ep = acm->notify;
- struct usb_request *req;
- struct usb_cdc_notification *notify;
- const unsigned len = sizeof(*notify) + length;
- void *buf;
- int status;
-
- req = acm->notify_req;
- acm->notify_req = NULL;
- acm->pending = false;
-
- req->length = len;
- notify = req->buf;
- buf = notify + 1;
-
- notify->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS
- | USB_RECIP_INTERFACE;
- notify->bNotificationType = type;
- notify->wValue = cpu_to_le16(value);
- notify->wIndex = cpu_to_le16(acm->ctrl_id);
- notify->wLength = cpu_to_le16(length);
- memcpy(buf, data, length);
-
- /* ep_queue() can complete immediately if it fills the fifo... */
- spin_unlock(&acm->lock);
- status = usb_ep_queue(ep, req, GFP_ATOMIC);
- spin_lock(&acm->lock);
-
- if (status < 0) {
- ERROR(acm->port.func.config->cdev,
- "acm ttyGS%d can't notify serial state, %d\n",
- acm->port_num, status);
- acm->notify_req = req;
- }
-
- return status;
-}
-
-static int acm_notify_serial_state(struct f_acm *acm)
-{
- struct usb_composite_dev *cdev = acm->port.func.config->cdev;
- int status;
-
- spin_lock(&acm->lock);
- if (acm->notify_req) {
- DBG(cdev, "acm ttyGS%d serial state %04x\n",
- acm->port_num, acm->serial_state);
- status = acm_cdc_notify(acm, USB_CDC_NOTIFY_SERIAL_STATE,
- 0, &acm->serial_state, sizeof(acm->serial_state));
- } else {
- acm->pending = true;
- status = 0;
- }
- spin_unlock(&acm->lock);
- return status;
-}
-
-static void acm_cdc_notify_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_acm *acm = req->context;
- u8 doit = false;
-
- /* on this call path we do NOT hold the port spinlock,
- * which is why ACM needs its own spinlock
- */
- spin_lock(&acm->lock);
- if (req->status != -ESHUTDOWN)
- doit = acm->pending;
- acm->notify_req = req;
- spin_unlock(&acm->lock);
-
- if (doit)
- acm_notify_serial_state(acm);
-}
-
-/* connect == the TTY link is open */
-
-static void acm_connect(struct gserial *port)
-{
- struct f_acm *acm = port_to_acm(port);
-
- acm->serial_state |= ACM_CTRL_DSR | ACM_CTRL_DCD;
- acm_notify_serial_state(acm);
-}
-
-static void acm_disconnect(struct gserial *port)
-{
- struct f_acm *acm = port_to_acm(port);
-
- acm->serial_state &= ~(ACM_CTRL_DSR | ACM_CTRL_DCD);
- acm_notify_serial_state(acm);
-}
-
-static int acm_send_break(struct gserial *port, int duration)
-{
- struct f_acm *acm = port_to_acm(port);
- u16 state;
-
- state = acm->serial_state;
- state &= ~ACM_CTRL_BRK;
- if (duration)
- state |= ACM_CTRL_BRK;
-
- acm->serial_state = state;
- return acm_notify_serial_state(acm);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* ACM function driver setup/binding */
-static int
-acm_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_acm *acm = func_to_acm(f);
- int status;
- struct usb_ep *ep;
-
- /* allocate instance-specific interface IDs, and patch descriptors */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- acm->ctrl_id = status;
- acm_iad_descriptor.bFirstInterface = status;
-
- acm_control_interface_desc.bInterfaceNumber = status;
- acm_union_desc .bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- acm->data_id = status;
-
- acm_data_interface_desc.bInterfaceNumber = status;
- acm_union_desc.bSlaveInterface0 = status;
- acm_call_mgmt_descriptor.bDataInterface = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_in_desc);
- if (!ep)
- goto fail;
- acm->port.in = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_out_desc);
- if (!ep)
- goto fail;
- acm->port.out = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_notify_desc);
- if (!ep)
- goto fail;
- acm->notify = ep;
- ep->driver_data = cdev; /* claim */
-
- /* allocate notification */
- acm->notify_req = gs_alloc_req(ep,
- sizeof(struct usb_cdc_notification) + 2,
- GFP_KERNEL);
- if (!acm->notify_req)
- goto fail;
-
- acm->notify_req->complete = acm_cdc_notify_complete;
- acm->notify_req->context = acm;
-
- /* copy descriptors */
- f->descriptors = usb_copy_descriptors(acm_fs_function);
- if (!f->descriptors)
- goto fail;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- if (gadget_is_dualspeed(c->cdev->gadget)) {
- acm_hs_in_desc.bEndpointAddress =
- acm_fs_in_desc.bEndpointAddress;
- acm_hs_out_desc.bEndpointAddress =
- acm_fs_out_desc.bEndpointAddress;
- acm_hs_notify_desc.bEndpointAddress =
- acm_fs_notify_desc.bEndpointAddress;
-
- /* copy descriptors */
- f->hs_descriptors = usb_copy_descriptors(acm_hs_function);
- }
- if (gadget_is_superspeed(c->cdev->gadget)) {
- acm_ss_in_desc.bEndpointAddress =
- acm_fs_in_desc.bEndpointAddress;
- acm_ss_out_desc.bEndpointAddress =
- acm_fs_out_desc.bEndpointAddress;
-
- /* copy descriptors, and track endpoint copies */
- f->ss_descriptors = usb_copy_descriptors(acm_ss_function);
- if (!f->ss_descriptors)
- goto fail;
- }
-
- DBG(cdev, "acm ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- acm->port_num,
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- acm->port.in->name, acm->port.out->name,
- acm->notify->name);
- return 0;
-
-fail:
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
-
- /* we might as well release our claims on endpoints */
- if (acm->notify)
- acm->notify->driver_data = NULL;
- if (acm->port.out)
- acm->port.out->driver_data = NULL;
- if (acm->port.in)
- acm->port.in->driver_data = NULL;
-
- ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
-
- return status;
-}
-
-static void
-acm_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_acm *acm = func_to_acm(f);
-
- if (gadget_is_dualspeed(c->cdev->gadget))
- usb_free_descriptors(f->hs_descriptors);
- if (gadget_is_superspeed(c->cdev->gadget))
- usb_free_descriptors(f->ss_descriptors);
- usb_free_descriptors(f->descriptors);
- gs_free_req(acm->notify, acm->notify_req);
- kfree(acm);
-}
-
-/* Some controllers can't support CDC ACM ... */
-static inline bool can_support_cdc(struct usb_configuration *c)
-{
- /* everything else is *probably* fine ... */
- return true;
-}
-
-/**
- * acm_bind_config - add a CDC ACM function to a configuration
- * @c: the configuration to support the CDC ACM instance
- * @port_num: /dev/ttyGS* port this interface will use
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- *
- * Caller must have called @gserial_setup() with enough ports to
- * handle all the ones it binds. Caller is also responsible
- * for calling @gserial_cleanup() before module unload.
- */
-int acm_bind_config(struct usb_configuration *c, u8 port_num)
-{
- struct f_acm *acm;
- int status;
-
- if (!can_support_cdc(c))
- return -EINVAL;
-
- /* REVISIT might want instance-specific strings to help
- * distinguish instances ...
- */
-
- /* maybe allocate device-global string IDs, and patch descriptors */
- if (acm_string_defs[ACM_CTRL_IDX].id == 0) {
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- acm_string_defs[ACM_CTRL_IDX].id = status;
-
- acm_control_interface_desc.iInterface = status;
-
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- acm_string_defs[ACM_DATA_IDX].id = status;
-
- acm_data_interface_desc.iInterface = status;
-
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- acm_string_defs[ACM_IAD_IDX].id = status;
-
- acm_iad_descriptor.iFunction = status;
- }
-
- /* allocate and initialize one new instance */
- acm = kzalloc(sizeof *acm, GFP_KERNEL);
- if (!acm)
- return -ENOMEM;
-
- spin_lock_init(&acm->lock);
-
- acm->port_num = port_num;
-
- acm->port.connect = acm_connect;
- acm->port.disconnect = acm_disconnect;
- acm->port.send_break = acm_send_break;
-
- acm->port.func.name = "acm";
- acm->port.func.strings = acm_strings;
- /* descriptors are per-instance copies */
- acm->port.func.bind = acm_bind;
- acm->port.func.unbind = acm_unbind;
- acm->port.func.set_alt = acm_set_alt;
- acm->port.func.setup = acm_setup;
- acm->port.func.disable = acm_disable;
-
- status = usb_add_function(c, &acm->port.func);
- if (status)
- kfree(acm);
- return status;
-}
+++ /dev/null
-/*
- * f_fs.c -- user mode file system API for USB composite function controllers
- *
- * Copyright (C) 2010 Samsung Electronics
- * Author: Michal Nazarewicz <mina86@mina86.com>
- *
- * Based on inode.c (GadgetFS) which was:
- * Copyright (C) 2003-2004 David Brownell
- * Copyright (C) 2003 Agilent Technologies
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-
-/* #define DEBUG */
-/* #define VERBOSE_DEBUG */
-
-#include <linux/blkdev.h>
-#include <linux/pagemap.h>
-#include <linux/export.h>
-#include <linux/hid.h>
-#include <asm/unaligned.h>
-
-#include <linux/usb/composite.h>
-#include <linux/usb/functionfs.h>
-
-
-#define FUNCTIONFS_MAGIC 0xa647361 /* Chosen by a honest dice roll ;) */
-
-
-/* Debugging ****************************************************************/
-
-#ifdef VERBOSE_DEBUG
-# define pr_vdebug pr_debug
-# define ffs_dump_mem(prefix, ptr, len) \
- print_hex_dump_bytes(pr_fmt(prefix ": "), DUMP_PREFIX_NONE, ptr, len)
-#else
-# define pr_vdebug(...) do { } while (0)
-# define ffs_dump_mem(prefix, ptr, len) do { } while (0)
-#endif /* VERBOSE_DEBUG */
-
-#define ENTER() pr_vdebug("%s()\n", __func__)
-
-
-/* The data structure and setup file ****************************************/
-
-enum ffs_state {
- /*
- * Waiting for descriptors and strings.
- *
- * In this state no open(2), read(2) or write(2) on epfiles
- * may succeed (which should not be the problem as there
- * should be no such files opened in the first place).
- */
- FFS_READ_DESCRIPTORS,
- FFS_READ_STRINGS,
-
- /*
- * We've got descriptors and strings. We are or have called
- * functionfs_ready_callback(). functionfs_bind() may have
- * been called but we don't know.
- *
- * This is the only state in which operations on epfiles may
- * succeed.
- */
- FFS_ACTIVE,
-
- /*
- * All endpoints have been closed. This state is also set if
- * we encounter an unrecoverable error. The only
- * unrecoverable error is situation when after reading strings
- * from user space we fail to initialise epfiles or
- * functionfs_ready_callback() returns with error (<0).
- *
- * In this state no open(2), read(2) or write(2) (both on ep0
- * as well as epfile) may succeed (at this point epfiles are
- * unlinked and all closed so this is not a problem; ep0 is
- * also closed but ep0 file exists and so open(2) on ep0 must
- * fail).
- */
- FFS_CLOSING
-};
-
-
-enum ffs_setup_state {
- /* There is no setup request pending. */
- FFS_NO_SETUP,
- /*
- * User has read events and there was a setup request event
- * there. The next read/write on ep0 will handle the
- * request.
- */
- FFS_SETUP_PENDING,
- /*
- * There was event pending but before user space handled it
- * some other event was introduced which canceled existing
- * setup. If this state is set read/write on ep0 return
- * -EIDRM. This state is only set when adding event.
- */
- FFS_SETUP_CANCELED
-};
-
-
-
-struct ffs_epfile;
-struct ffs_function;
-
-struct ffs_data {
- struct usb_gadget *gadget;
-
- /*
- * Protect access read/write operations, only one read/write
- * at a time. As a consequence protects ep0req and company.
- * While setup request is being processed (queued) this is
- * held.
- */
- struct mutex mutex;
-
- /*
- * Protect access to endpoint related structures (basically
- * usb_ep_queue(), usb_ep_dequeue(), etc. calls) except for
- * endpoint zero.
- */
- spinlock_t eps_lock;
-
- /*
- * XXX REVISIT do we need our own request? Since we are not
- * handling setup requests immediately user space may be so
- * slow that another setup will be sent to the gadget but this
- * time not to us but another function and then there could be
- * a race. Is that the case? Or maybe we can use cdev->req
- * after all, maybe we just need some spinlock for that?
- */
- struct usb_request *ep0req; /* P: mutex */
- struct completion ep0req_completion; /* P: mutex */
- int ep0req_status; /* P: mutex */
-
- /* reference counter */
- atomic_t ref;
- /* how many files are opened (EP0 and others) */
- atomic_t opened;
-
- /* EP0 state */
- enum ffs_state state;
-
- /*
- * Possible transitions:
- * + FFS_NO_SETUP -> FFS_SETUP_PENDING -- P: ev.waitq.lock
- * happens only in ep0 read which is P: mutex
- * + FFS_SETUP_PENDING -> FFS_NO_SETUP -- P: ev.waitq.lock
- * happens only in ep0 i/o which is P: mutex
- * + FFS_SETUP_PENDING -> FFS_SETUP_CANCELED -- P: ev.waitq.lock
- * + FFS_SETUP_CANCELED -> FFS_NO_SETUP -- cmpxchg
- */
- enum ffs_setup_state setup_state;
-
-#define FFS_SETUP_STATE(ffs) \
- ((enum ffs_setup_state)cmpxchg(&(ffs)->setup_state, \
- FFS_SETUP_CANCELED, FFS_NO_SETUP))
-
- /* Events & such. */
- struct {
- u8 types[4];
- unsigned short count;
- /* XXX REVISIT need to update it in some places, or do we? */
- unsigned short can_stall;
- struct usb_ctrlrequest setup;
-
- wait_queue_head_t waitq;
- } ev; /* the whole structure, P: ev.waitq.lock */
-
- /* Flags */
- unsigned long flags;
-#define FFS_FL_CALL_CLOSED_CALLBACK 0
-#define FFS_FL_BOUND 1
-
- /* Active function */
- struct ffs_function *func;
-
- /*
- * Device name, write once when file system is mounted.
- * Intended for user to read if she wants.
- */
- const char *dev_name;
- /* Private data for our user (ie. gadget). Managed by user. */
- void *private_data;
-
- /* filled by __ffs_data_got_descs() */
- /*
- * Real descriptors are 16 bytes after raw_descs (so you need
- * to skip 16 bytes (ie. ffs->raw_descs + 16) to get to the
- * first full speed descriptor). raw_descs_length and
- * raw_fs_descs_length do not have those 16 bytes added.
- */
- const void *raw_descs;
- unsigned raw_descs_length;
- unsigned raw_fs_descs_length;
- unsigned fs_descs_count;
- unsigned hs_descs_count;
-
- unsigned short strings_count;
- unsigned short interfaces_count;
- unsigned short eps_count;
- unsigned short _pad1;
-
- /* filled by __ffs_data_got_strings() */
- /* ids in stringtabs are set in functionfs_bind() */
- const void *raw_strings;
- struct usb_gadget_strings **stringtabs;
-
- /*
- * File system's super block, write once when file system is
- * mounted.
- */
- struct super_block *sb;
-
- /* File permissions, written once when fs is mounted */
- struct ffs_file_perms {
- umode_t mode;
- uid_t uid;
- gid_t gid;
- } file_perms;
-
- /*
- * The endpoint files, filled by ffs_epfiles_create(),
- * destroyed by ffs_epfiles_destroy().
- */
- struct ffs_epfile *epfiles;
-};
-
-/* Reference counter handling */
-static void ffs_data_get(struct ffs_data *ffs);
-static void ffs_data_put(struct ffs_data *ffs);
-/* Creates new ffs_data object. */
-static struct ffs_data *__must_check ffs_data_new(void) __attribute__((malloc));
-
-/* Opened counter handling. */
-static void ffs_data_opened(struct ffs_data *ffs);
-static void ffs_data_closed(struct ffs_data *ffs);
-
-/* Called with ffs->mutex held; take over ownership of data. */
-static int __must_check
-__ffs_data_got_descs(struct ffs_data *ffs, char *data, size_t len);
-static int __must_check
-__ffs_data_got_strings(struct ffs_data *ffs, char *data, size_t len);
-
-
-/* The function structure ***************************************************/
-
-struct ffs_ep;
-
-struct ffs_function {
- struct usb_configuration *conf;
- struct usb_gadget *gadget;
- struct ffs_data *ffs;
-
- struct ffs_ep *eps;
- u8 eps_revmap[16];
- short *interfaces_nums;
-
- struct usb_function function;
-};
-
-
-static struct ffs_function *ffs_func_from_usb(struct usb_function *f)
-{
- return container_of(f, struct ffs_function, function);
-}
-
-static void ffs_func_free(struct ffs_function *func);
-
-static void ffs_func_eps_disable(struct ffs_function *func);
-static int __must_check ffs_func_eps_enable(struct ffs_function *func);
-
-static int ffs_func_bind(struct usb_configuration *,
- struct usb_function *);
-static void ffs_func_unbind(struct usb_configuration *,
- struct usb_function *);
-static int ffs_func_set_alt(struct usb_function *, unsigned, unsigned);
-static void ffs_func_disable(struct usb_function *);
-static int ffs_func_setup(struct usb_function *,
- const struct usb_ctrlrequest *);
-static void ffs_func_suspend(struct usb_function *);
-static void ffs_func_resume(struct usb_function *);
-
-
-static int ffs_func_revmap_ep(struct ffs_function *func, u8 num);
-static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf);
-
-
-/* The endpoints structures *************************************************/
-
-struct ffs_ep {
- struct usb_ep *ep; /* P: ffs->eps_lock */
- struct usb_request *req; /* P: epfile->mutex */
-
- /* [0]: full speed, [1]: high speed */
- struct usb_endpoint_descriptor *descs[2];
-
- u8 num;
-
- int status; /* P: epfile->mutex */
-};
-
-struct ffs_epfile {
- /* Protects ep->ep and ep->req. */
- struct mutex mutex;
- wait_queue_head_t wait;
-
- struct ffs_data *ffs;
- struct ffs_ep *ep; /* P: ffs->eps_lock */
-
- struct dentry *dentry;
-
- char name[5];
-
- unsigned char in; /* P: ffs->eps_lock */
- unsigned char isoc; /* P: ffs->eps_lock */
-
- unsigned char _pad;
-};
-
-static int __must_check ffs_epfiles_create(struct ffs_data *ffs);
-static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count);
-
-static struct inode *__must_check
-ffs_sb_create_file(struct super_block *sb, const char *name, void *data,
- const struct file_operations *fops,
- struct dentry **dentry_p);
-
-
-/* Misc helper functions ****************************************************/
-
-static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
- __attribute__((warn_unused_result, nonnull));
-static char *ffs_prepare_buffer(const char * __user buf, size_t len)
- __attribute__((warn_unused_result, nonnull));
-
-
-/* Control file aka ep0 *****************************************************/
-
-static void ffs_ep0_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct ffs_data *ffs = req->context;
-
- complete_all(&ffs->ep0req_completion);
-}
-
-static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
-{
- struct usb_request *req = ffs->ep0req;
- int ret;
-
- req->zero = len < le16_to_cpu(ffs->ev.setup.wLength);
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-
- req->buf = data;
- req->length = len;
-
- /*
- * UDC layer requires to provide a buffer even for ZLP, but should
- * not use it at all. Let's provide some poisoned pointer to catch
- * possible bug in the driver.
- */
- if (req->buf == NULL)
- req->buf = (void *)0xDEADBABE;
-
- INIT_COMPLETION(ffs->ep0req_completion);
-
- ret = usb_ep_queue(ffs->gadget->ep0, req, GFP_ATOMIC);
- if (unlikely(ret < 0))
- return ret;
-
- ret = wait_for_completion_interruptible(&ffs->ep0req_completion);
- if (unlikely(ret)) {
- usb_ep_dequeue(ffs->gadget->ep0, req);
- return -EINTR;
- }
-
- ffs->setup_state = FFS_NO_SETUP;
- return ffs->ep0req_status;
-}
-
-static int __ffs_ep0_stall(struct ffs_data *ffs)
-{
- if (ffs->ev.can_stall) {
- pr_vdebug("ep0 stall\n");
- usb_ep_set_halt(ffs->gadget->ep0);
- ffs->setup_state = FFS_NO_SETUP;
- return -EL2HLT;
- } else {
- pr_debug("bogus ep0 stall!\n");
- return -ESRCH;
- }
-}
-
-static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
- size_t len, loff_t *ptr)
-{
- struct ffs_data *ffs = file->private_data;
- ssize_t ret;
- char *data;
-
- ENTER();
-
- /* Fast check if setup was canceled */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED)
- return -EIDRM;
-
- /* Acquire mutex */
- ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
- if (unlikely(ret < 0))
- return ret;
-
- /* Check state */
- switch (ffs->state) {
- case FFS_READ_DESCRIPTORS:
- case FFS_READ_STRINGS:
- /* Copy data */
- if (unlikely(len < 16)) {
- ret = -EINVAL;
- break;
- }
-
- data = ffs_prepare_buffer(buf, len);
- if (IS_ERR(data)) {
- ret = PTR_ERR(data);
- break;
- }
-
- /* Handle data */
- if (ffs->state == FFS_READ_DESCRIPTORS) {
- pr_info("read descriptors\n");
- ret = __ffs_data_got_descs(ffs, data, len);
- if (unlikely(ret < 0))
- break;
-
- ffs->state = FFS_READ_STRINGS;
- ret = len;
- } else {
- pr_info("read strings\n");
- ret = __ffs_data_got_strings(ffs, data, len);
- if (unlikely(ret < 0))
- break;
-
- ret = ffs_epfiles_create(ffs);
- if (unlikely(ret)) {
- ffs->state = FFS_CLOSING;
- break;
- }
-
- ffs->state = FFS_ACTIVE;
- mutex_unlock(&ffs->mutex);
-
- ret = functionfs_ready_callback(ffs);
- if (unlikely(ret < 0)) {
- ffs->state = FFS_CLOSING;
- return ret;
- }
-
- set_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags);
- return len;
- }
- break;
-
- case FFS_ACTIVE:
- data = NULL;
- /*
- * We're called from user space, we can use _irq
- * rather then _irqsave
- */
- spin_lock_irq(&ffs->ev.waitq.lock);
- switch (FFS_SETUP_STATE(ffs)) {
- case FFS_SETUP_CANCELED:
- ret = -EIDRM;
- goto done_spin;
-
- case FFS_NO_SETUP:
- ret = -ESRCH;
- goto done_spin;
-
- case FFS_SETUP_PENDING:
- break;
- }
-
- /* FFS_SETUP_PENDING */
- if (!(ffs->ev.setup.bRequestType & USB_DIR_IN)) {
- spin_unlock_irq(&ffs->ev.waitq.lock);
- ret = __ffs_ep0_stall(ffs);
- break;
- }
-
- /* FFS_SETUP_PENDING and not stall */
- len = min(len, (size_t)le16_to_cpu(ffs->ev.setup.wLength));
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-
- data = ffs_prepare_buffer(buf, len);
- if (IS_ERR(data)) {
- ret = PTR_ERR(data);
- break;
- }
-
- spin_lock_irq(&ffs->ev.waitq.lock);
-
- /*
- * We are guaranteed to be still in FFS_ACTIVE state
- * but the state of setup could have changed from
- * FFS_SETUP_PENDING to FFS_SETUP_CANCELED so we need
- * to check for that. If that happened we copied data
- * from user space in vain but it's unlikely.
- *
- * For sure we are not in FFS_NO_SETUP since this is
- * the only place FFS_SETUP_PENDING -> FFS_NO_SETUP
- * transition can be performed and it's protected by
- * mutex.
- */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED) {
- ret = -EIDRM;
-done_spin:
- spin_unlock_irq(&ffs->ev.waitq.lock);
- } else {
- /* unlocks spinlock */
- ret = __ffs_ep0_queue_wait(ffs, data, len);
- }
- kfree(data);
- break;
-
- default:
- ret = -EBADFD;
- break;
- }
-
- mutex_unlock(&ffs->mutex);
- return ret;
-}
-
-static ssize_t __ffs_ep0_read_events(struct ffs_data *ffs, char __user *buf,
- size_t n)
-{
- /*
- * We are holding ffs->ev.waitq.lock and ffs->mutex and we need
- * to release them.
- */
- struct usb_functionfs_event events[n];
- unsigned i = 0;
-
- memset(events, 0, sizeof events);
-
- do {
- events[i].type = ffs->ev.types[i];
- if (events[i].type == FUNCTIONFS_SETUP) {
- events[i].u.setup = ffs->ev.setup;
- ffs->setup_state = FFS_SETUP_PENDING;
- }
- } while (++i < n);
-
- if (n < ffs->ev.count) {
- ffs->ev.count -= n;
- memmove(ffs->ev.types, ffs->ev.types + n,
- ffs->ev.count * sizeof *ffs->ev.types);
- } else {
- ffs->ev.count = 0;
- }
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
- mutex_unlock(&ffs->mutex);
-
- return unlikely(__copy_to_user(buf, events, sizeof events))
- ? -EFAULT : sizeof events;
-}
-
-static ssize_t ffs_ep0_read(struct file *file, char __user *buf,
- size_t len, loff_t *ptr)
-{
- struct ffs_data *ffs = file->private_data;
- char *data = NULL;
- size_t n;
- int ret;
-
- ENTER();
-
- /* Fast check if setup was canceled */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED)
- return -EIDRM;
-
- /* Acquire mutex */
- ret = ffs_mutex_lock(&ffs->mutex, file->f_flags & O_NONBLOCK);
- if (unlikely(ret < 0))
- return ret;
-
- /* Check state */
- if (ffs->state != FFS_ACTIVE) {
- ret = -EBADFD;
- goto done_mutex;
- }
-
- /*
- * We're called from user space, we can use _irq rather then
- * _irqsave
- */
- spin_lock_irq(&ffs->ev.waitq.lock);
-
- switch (FFS_SETUP_STATE(ffs)) {
- case FFS_SETUP_CANCELED:
- ret = -EIDRM;
- break;
-
- case FFS_NO_SETUP:
- n = len / sizeof(struct usb_functionfs_event);
- if (unlikely(!n)) {
- ret = -EINVAL;
- break;
- }
-
- if ((file->f_flags & O_NONBLOCK) && !ffs->ev.count) {
- ret = -EAGAIN;
- break;
- }
-
- if (wait_event_interruptible_exclusive_locked_irq(ffs->ev.waitq,
- ffs->ev.count)) {
- ret = -EINTR;
- break;
- }
-
- return __ffs_ep0_read_events(ffs, buf,
- min(n, (size_t)ffs->ev.count));
-
- case FFS_SETUP_PENDING:
- if (ffs->ev.setup.bRequestType & USB_DIR_IN) {
- spin_unlock_irq(&ffs->ev.waitq.lock);
- ret = __ffs_ep0_stall(ffs);
- goto done_mutex;
- }
-
- len = min(len, (size_t)le16_to_cpu(ffs->ev.setup.wLength));
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-
- if (likely(len)) {
- data = kmalloc(len, GFP_KERNEL);
- if (unlikely(!data)) {
- ret = -ENOMEM;
- goto done_mutex;
- }
- }
-
- spin_lock_irq(&ffs->ev.waitq.lock);
-
- /* See ffs_ep0_write() */
- if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELED) {
- ret = -EIDRM;
- break;
- }
-
- /* unlocks spinlock */
- ret = __ffs_ep0_queue_wait(ffs, data, len);
- if (likely(ret > 0) && unlikely(__copy_to_user(buf, data, len)))
- ret = -EFAULT;
- goto done_mutex;
-
- default:
- ret = -EBADFD;
- break;
- }
-
- spin_unlock_irq(&ffs->ev.waitq.lock);
-done_mutex:
- mutex_unlock(&ffs->mutex);
- kfree(data);
- return ret;
-}
-
-static int ffs_ep0_open(struct inode *inode, struct file *file)
-{
- struct ffs_data *ffs = inode->i_private;
-
- ENTER();
-
- if (unlikely(ffs->state == FFS_CLOSING))
- return -EBUSY;
-
- file->private_data = ffs;
- ffs_data_opened(ffs);
-
- return 0;
-}
-
-static int ffs_ep0_release(struct inode *inode, struct file *file)
-{
- struct ffs_data *ffs = file->private_data;
-
- ENTER();
-
- ffs_data_closed(ffs);
-
- return 0;
-}
-
-static long ffs_ep0_ioctl(struct file *file, unsigned code, unsigned long value)
-{
- struct ffs_data *ffs = file->private_data;
- struct usb_gadget *gadget = ffs->gadget;
- long ret;
-
- ENTER();
-
- if (code == FUNCTIONFS_INTERFACE_REVMAP) {
- struct ffs_function *func = ffs->func;
- ret = func ? ffs_func_revmap_intf(func, value) : -ENODEV;
- } else if (gadget && gadget->ops->ioctl) {
- ret = gadget->ops->ioctl(gadget, code, value);
- } else {
- ret = -ENOTTY;
- }
-
- return ret;
-}
-
-static const struct file_operations ffs_ep0_operations = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
-
- .open = ffs_ep0_open,
- .write = ffs_ep0_write,
- .read = ffs_ep0_read,
- .release = ffs_ep0_release,
- .unlocked_ioctl = ffs_ep0_ioctl,
-};
-
-
-/* "Normal" endpoints operations ********************************************/
-
-static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req)
-{
- ENTER();
- if (likely(req->context)) {
- struct ffs_ep *ep = _ep->driver_data;
- ep->status = req->status ? req->status : req->actual;
- complete(req->context);
- }
-}
-
-static ssize_t ffs_epfile_io(struct file *file,
- char __user *buf, size_t len, int read)
-{
- struct ffs_epfile *epfile = file->private_data;
- struct ffs_ep *ep;
- char *data = NULL;
- ssize_t ret;
- int halt;
-
- goto first_try;
- do {
- spin_unlock_irq(&epfile->ffs->eps_lock);
- mutex_unlock(&epfile->mutex);
-
-first_try:
- /* Are we still active? */
- if (WARN_ON(epfile->ffs->state != FFS_ACTIVE)) {
- ret = -ENODEV;
- goto error;
- }
-
- /* Wait for endpoint to be enabled */
- ep = epfile->ep;
- if (!ep) {
- if (file->f_flags & O_NONBLOCK) {
- ret = -EAGAIN;
- goto error;
- }
-
- if (wait_event_interruptible(epfile->wait,
- (ep = epfile->ep))) {
- ret = -EINTR;
- goto error;
- }
- }
-
- /* Do we halt? */
- halt = !read == !epfile->in;
- if (halt && epfile->isoc) {
- ret = -EINVAL;
- goto error;
- }
-
- /* Allocate & copy */
- if (!halt && !data) {
- data = kzalloc(len, GFP_KERNEL);
- if (unlikely(!data))
- return -ENOMEM;
-
- if (!read &&
- unlikely(__copy_from_user(data, buf, len))) {
- ret = -EFAULT;
- goto error;
- }
- }
-
- /* We will be using request */
- ret = ffs_mutex_lock(&epfile->mutex,
- file->f_flags & O_NONBLOCK);
- if (unlikely(ret))
- goto error;
-
- /*
- * We're called from user space, we can use _irq rather then
- * _irqsave
- */
- spin_lock_irq(&epfile->ffs->eps_lock);
-
- /*
- * While we were acquiring mutex endpoint got disabled
- * or changed?
- */
- } while (unlikely(epfile->ep != ep));
-
- /* Halt */
- if (unlikely(halt)) {
- if (likely(epfile->ep == ep) && !WARN_ON(!ep->ep))
- usb_ep_set_halt(ep->ep);
- spin_unlock_irq(&epfile->ffs->eps_lock);
- ret = -EBADMSG;
- } else {
- /* Fire the request */
- DECLARE_COMPLETION_ONSTACK(done);
-
- struct usb_request *req = ep->req;
- req->context = &done;
- req->complete = ffs_epfile_io_complete;
- req->buf = data;
- req->length = len;
-
- ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
-
- spin_unlock_irq(&epfile->ffs->eps_lock);
-
- if (unlikely(ret < 0)) {
- /* nop */
- } else if (unlikely(wait_for_completion_interruptible(&done))) {
- ret = -EINTR;
- usb_ep_dequeue(ep->ep, req);
- } else {
- ret = ep->status;
- if (read && ret > 0 &&
- unlikely(copy_to_user(buf, data, ret)))
- ret = -EFAULT;
- }
- }
-
- mutex_unlock(&epfile->mutex);
-error:
- kfree(data);
- return ret;
-}
-
-static ssize_t
-ffs_epfile_write(struct file *file, const char __user *buf, size_t len,
- loff_t *ptr)
-{
- ENTER();
-
- return ffs_epfile_io(file, (char __user *)buf, len, 0);
-}
-
-static ssize_t
-ffs_epfile_read(struct file *file, char __user *buf, size_t len, loff_t *ptr)
-{
- ENTER();
-
- return ffs_epfile_io(file, buf, len, 1);
-}
-
-static int
-ffs_epfile_open(struct inode *inode, struct file *file)
-{
- struct ffs_epfile *epfile = inode->i_private;
-
- ENTER();
-
- if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
- return -ENODEV;
-
- file->private_data = epfile;
- ffs_data_opened(epfile->ffs);
-
- return 0;
-}
-
-static int
-ffs_epfile_release(struct inode *inode, struct file *file)
-{
- struct ffs_epfile *epfile = inode->i_private;
-
- ENTER();
-
- ffs_data_closed(epfile->ffs);
-
- return 0;
-}
-
-static long ffs_epfile_ioctl(struct file *file, unsigned code,
- unsigned long value)
-{
- struct ffs_epfile *epfile = file->private_data;
- int ret;
-
- ENTER();
-
- if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
- return -ENODEV;
-
- spin_lock_irq(&epfile->ffs->eps_lock);
- if (likely(epfile->ep)) {
- switch (code) {
- case FUNCTIONFS_FIFO_STATUS:
- ret = usb_ep_fifo_status(epfile->ep->ep);
- break;
- case FUNCTIONFS_FIFO_FLUSH:
- usb_ep_fifo_flush(epfile->ep->ep);
- ret = 0;
- break;
- case FUNCTIONFS_CLEAR_HALT:
- ret = usb_ep_clear_halt(epfile->ep->ep);
- break;
- case FUNCTIONFS_ENDPOINT_REVMAP:
- ret = epfile->ep->num;
- break;
- default:
- ret = -ENOTTY;
- }
- } else {
- ret = -ENODEV;
- }
- spin_unlock_irq(&epfile->ffs->eps_lock);
-
- return ret;
-}
-
-static const struct file_operations ffs_epfile_operations = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
-
- .open = ffs_epfile_open,
- .write = ffs_epfile_write,
- .read = ffs_epfile_read,
- .release = ffs_epfile_release,
- .unlocked_ioctl = ffs_epfile_ioctl,
-};
-
-
-/* File system and super block operations ***********************************/
-
-/*
- * Mounting the file system creates a controller file, used first for
- * function configuration then later for event monitoring.
- */
-
-static struct inode *__must_check
-ffs_sb_make_inode(struct super_block *sb, void *data,
- const struct file_operations *fops,
- const struct inode_operations *iops,
- struct ffs_file_perms *perms)
-{
- struct inode *inode;
-
- ENTER();
-
- inode = new_inode(sb);
-
- if (likely(inode)) {
- struct timespec current_time = CURRENT_TIME;
-
- inode->i_ino = get_next_ino();
- inode->i_mode = perms->mode;
- inode->i_uid = perms->uid;
- inode->i_gid = perms->gid;
- inode->i_atime = current_time;
- inode->i_mtime = current_time;
- inode->i_ctime = current_time;
- inode->i_private = data;
- if (fops)
- inode->i_fop = fops;
- if (iops)
- inode->i_op = iops;
- }
-
- return inode;
-}
-
-/* Create "regular" file */
-static struct inode *ffs_sb_create_file(struct super_block *sb,
- const char *name, void *data,
- const struct file_operations *fops,
- struct dentry **dentry_p)
-{
- struct ffs_data *ffs = sb->s_fs_info;
- struct dentry *dentry;
- struct inode *inode;
-
- ENTER();
-
- dentry = d_alloc_name(sb->s_root, name);
- if (unlikely(!dentry))
- return NULL;
-
- inode = ffs_sb_make_inode(sb, data, fops, NULL, &ffs->file_perms);
- if (unlikely(!inode)) {
- dput(dentry);
- return NULL;
- }
-
- d_add(dentry, inode);
- if (dentry_p)
- *dentry_p = dentry;
-
- return inode;
-}
-
-/* Super block */
-static const struct super_operations ffs_sb_operations = {
- .statfs = simple_statfs,
- .drop_inode = generic_delete_inode,
-};
-
-struct ffs_sb_fill_data {
- struct ffs_file_perms perms;
- umode_t root_mode;
- const char *dev_name;
- union {
- /* set by ffs_fs_mount(), read by ffs_sb_fill() */
- void *private_data;
- /* set by ffs_sb_fill(), read by ffs_fs_mount */
- struct ffs_data *ffs_data;
- };
-};
-
-static int ffs_sb_fill(struct super_block *sb, void *_data, int silent)
-{
- struct ffs_sb_fill_data *data = _data;
- struct inode *inode;
- struct ffs_data *ffs;
-
- ENTER();
-
- /* Initialise data */
- ffs = ffs_data_new();
- if (unlikely(!ffs))
- goto Enomem;
-
- ffs->sb = sb;
- ffs->dev_name = kstrdup(data->dev_name, GFP_KERNEL);
- if (unlikely(!ffs->dev_name))
- goto Enomem;
- ffs->file_perms = data->perms;
- ffs->private_data = data->private_data;
-
- /* used by the caller of this function */
- data->ffs_data = ffs;
-
- sb->s_fs_info = ffs;
- sb->s_blocksize = PAGE_CACHE_SIZE;
- sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
- sb->s_magic = FUNCTIONFS_MAGIC;
- sb->s_op = &ffs_sb_operations;
- sb->s_time_gran = 1;
-
- /* Root inode */
- data->perms.mode = data->root_mode;
- inode = ffs_sb_make_inode(sb, NULL,
- &simple_dir_operations,
- &simple_dir_inode_operations,
- &data->perms);
- sb->s_root = d_make_root(inode);
- if (unlikely(!sb->s_root))
- goto Enomem;
-
- /* EP0 file */
- if (unlikely(!ffs_sb_create_file(sb, "ep0", ffs,
- &ffs_ep0_operations, NULL)))
- goto Enomem;
-
- return 0;
-
-Enomem:
- return -ENOMEM;
-}
-
-static int ffs_fs_parse_opts(struct ffs_sb_fill_data *data, char *opts)
-{
- ENTER();
-
- if (!opts || !*opts)
- return 0;
-
- for (;;) {
- char *end, *eq, *comma;
- unsigned long value;
-
- /* Option limit */
- comma = strchr(opts, ',');
- if (comma)
- *comma = 0;
-
- /* Value limit */
- eq = strchr(opts, '=');
- if (unlikely(!eq)) {
- pr_err("'=' missing in %s\n", opts);
- return -EINVAL;
- }
- *eq = 0;
-
- /* Parse value */
- value = simple_strtoul(eq + 1, &end, 0);
- if (unlikely(*end != ',' && *end != 0)) {
- pr_err("%s: invalid value: %s\n", opts, eq + 1);
- return -EINVAL;
- }
-
- /* Interpret option */
- switch (eq - opts) {
- case 5:
- if (!memcmp(opts, "rmode", 5))
- data->root_mode = (value & 0555) | S_IFDIR;
- else if (!memcmp(opts, "fmode", 5))
- data->perms.mode = (value & 0666) | S_IFREG;
- else
- goto invalid;
- break;
-
- case 4:
- if (!memcmp(opts, "mode", 4)) {
- data->root_mode = (value & 0555) | S_IFDIR;
- data->perms.mode = (value & 0666) | S_IFREG;
- } else {
- goto invalid;
- }
- break;
-
- case 3:
- if (!memcmp(opts, "uid", 3))
- data->perms.uid = value;
- else if (!memcmp(opts, "gid", 3))
- data->perms.gid = value;
- else
- goto invalid;
- break;
-
- default:
-invalid:
- pr_err("%s: invalid option\n", opts);
- return -EINVAL;
- }
-
- /* Next iteration */
- if (!comma)
- break;
- opts = comma + 1;
- }
-
- return 0;
-}
-
-/* "mount -t functionfs dev_name /dev/function" ends up here */
-
-static struct dentry *
-ffs_fs_mount(struct file_system_type *t, int flags,
- const char *dev_name, void *opts)
-{
- struct ffs_sb_fill_data data = {
- .perms = {
- .mode = S_IFREG | 0600,
- .uid = 0,
- .gid = 0
- },
- .root_mode = S_IFDIR | 0500,
- };
- struct dentry *rv;
- int ret;
- void *ffs_dev;
-
- ENTER();
-
- ret = ffs_fs_parse_opts(&data, opts);
- if (unlikely(ret < 0))
- return ERR_PTR(ret);
-
- ffs_dev = functionfs_acquire_dev_callback(dev_name);
- if (IS_ERR(ffs_dev))
- return ffs_dev;
-
- data.dev_name = dev_name;
- data.private_data = ffs_dev;
- rv = mount_nodev(t, flags, &data, ffs_sb_fill);
-
- /* data.ffs_data is set by ffs_sb_fill */
- if (IS_ERR(rv))
- functionfs_release_dev_callback(data.ffs_data);
-
- return rv;
-}
-
-static void
-ffs_fs_kill_sb(struct super_block *sb)
-{
- ENTER();
-
- kill_litter_super(sb);
- if (sb->s_fs_info) {
- functionfs_release_dev_callback(sb->s_fs_info);
- ffs_data_put(sb->s_fs_info);
- }
-}
-
-static struct file_system_type ffs_fs_type = {
- .owner = THIS_MODULE,
- .name = "functionfs",
- .mount = ffs_fs_mount,
- .kill_sb = ffs_fs_kill_sb,
-};
-
-
-/* Driver's main init/cleanup functions *************************************/
-
-static int functionfs_init(void)
-{
- int ret;
-
- ENTER();
-
- ret = register_filesystem(&ffs_fs_type);
- if (likely(!ret))
- pr_info("file system registered\n");
- else
- pr_err("failed registering file system (%d)\n", ret);
-
- return ret;
-}
-
-static void functionfs_cleanup(void)
-{
- ENTER();
-
- pr_info("unloading\n");
- unregister_filesystem(&ffs_fs_type);
-}
-
-
-/* ffs_data and ffs_function construction and destruction code **************/
-
-static void ffs_data_clear(struct ffs_data *ffs);
-static void ffs_data_reset(struct ffs_data *ffs);
-
-static void ffs_data_get(struct ffs_data *ffs)
-{
- ENTER();
-
- atomic_inc(&ffs->ref);
-}
-
-static void ffs_data_opened(struct ffs_data *ffs)
-{
- ENTER();
-
- atomic_inc(&ffs->ref);
- atomic_inc(&ffs->opened);
-}
-
-static void ffs_data_put(struct ffs_data *ffs)
-{
- ENTER();
-
- if (unlikely(atomic_dec_and_test(&ffs->ref))) {
- pr_info("%s(): freeing\n", __func__);
- ffs_data_clear(ffs);
- BUG_ON(waitqueue_active(&ffs->ev.waitq) ||
- waitqueue_active(&ffs->ep0req_completion.wait));
- kfree(ffs->dev_name);
- kfree(ffs);
- }
-}
-
-static void ffs_data_closed(struct ffs_data *ffs)
-{
- ENTER();
-
- if (atomic_dec_and_test(&ffs->opened)) {
- ffs->state = FFS_CLOSING;
- ffs_data_reset(ffs);
- }
-
- ffs_data_put(ffs);
-}
-
-static struct ffs_data *ffs_data_new(void)
-{
- struct ffs_data *ffs = kzalloc(sizeof *ffs, GFP_KERNEL);
- if (unlikely(!ffs))
- return 0;
-
- ENTER();
-
- atomic_set(&ffs->ref, 1);
- atomic_set(&ffs->opened, 0);
- ffs->state = FFS_READ_DESCRIPTORS;
- mutex_init(&ffs->mutex);
- spin_lock_init(&ffs->eps_lock);
- init_waitqueue_head(&ffs->ev.waitq);
- init_completion(&ffs->ep0req_completion);
-
- /* XXX REVISIT need to update it in some places, or do we? */
- ffs->ev.can_stall = 1;
-
- return ffs;
-}
-
-static void ffs_data_clear(struct ffs_data *ffs)
-{
- ENTER();
-
- if (test_and_clear_bit(FFS_FL_CALL_CLOSED_CALLBACK, &ffs->flags))
- functionfs_closed_callback(ffs);
-
- BUG_ON(ffs->gadget);
-
- if (ffs->epfiles)
- ffs_epfiles_destroy(ffs->epfiles, ffs->eps_count);
-
- kfree(ffs->raw_descs);
- kfree(ffs->raw_strings);
- kfree(ffs->stringtabs);
-}
-
-static void ffs_data_reset(struct ffs_data *ffs)
-{
- ENTER();
-
- ffs_data_clear(ffs);
-
- ffs->epfiles = NULL;
- ffs->raw_descs = NULL;
- ffs->raw_strings = NULL;
- ffs->stringtabs = NULL;
-
- ffs->raw_descs_length = 0;
- ffs->raw_fs_descs_length = 0;
- ffs->fs_descs_count = 0;
- ffs->hs_descs_count = 0;
-
- ffs->strings_count = 0;
- ffs->interfaces_count = 0;
- ffs->eps_count = 0;
-
- ffs->ev.count = 0;
-
- ffs->state = FFS_READ_DESCRIPTORS;
- ffs->setup_state = FFS_NO_SETUP;
- ffs->flags = 0;
-}
-
-
-static int functionfs_bind(struct ffs_data *ffs, struct usb_composite_dev *cdev)
-{
- struct usb_gadget_strings **lang;
- int first_id;
-
- ENTER();
-
- if (WARN_ON(ffs->state != FFS_ACTIVE
- || test_and_set_bit(FFS_FL_BOUND, &ffs->flags)))
- return -EBADFD;
-
- first_id = usb_string_ids_n(cdev, ffs->strings_count);
- if (unlikely(first_id < 0))
- return first_id;
-
- ffs->ep0req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL);
- if (unlikely(!ffs->ep0req))
- return -ENOMEM;
- ffs->ep0req->complete = ffs_ep0_complete;
- ffs->ep0req->context = ffs;
-
- lang = ffs->stringtabs;
- for (lang = ffs->stringtabs; *lang; ++lang) {
- struct usb_string *str = (*lang)->strings;
- int id = first_id;
- for (; str->s; ++id, ++str)
- str->id = id;
- }
-
- ffs->gadget = cdev->gadget;
- ffs_data_get(ffs);
- return 0;
-}
-
-static void functionfs_unbind(struct ffs_data *ffs)
-{
- ENTER();
-
- if (!WARN_ON(!ffs->gadget)) {
- usb_ep_free_request(ffs->gadget->ep0, ffs->ep0req);
- ffs->ep0req = NULL;
- ffs->gadget = NULL;
- ffs_data_put(ffs);
- clear_bit(FFS_FL_BOUND, &ffs->flags);
- }
-}
-
-static int ffs_epfiles_create(struct ffs_data *ffs)
-{
- struct ffs_epfile *epfile, *epfiles;
- unsigned i, count;
-
- ENTER();
-
- count = ffs->eps_count;
- epfiles = kcalloc(count, sizeof(*epfiles), GFP_KERNEL);
- if (!epfiles)
- return -ENOMEM;
-
- epfile = epfiles;
- for (i = 1; i <= count; ++i, ++epfile) {
- epfile->ffs = ffs;
- mutex_init(&epfile->mutex);
- init_waitqueue_head(&epfile->wait);
- sprintf(epfiles->name, "ep%u", i);
- if (!unlikely(ffs_sb_create_file(ffs->sb, epfiles->name, epfile,
- &ffs_epfile_operations,
- &epfile->dentry))) {
- ffs_epfiles_destroy(epfiles, i - 1);
- return -ENOMEM;
- }
- }
-
- ffs->epfiles = epfiles;
- return 0;
-}
-
-static void ffs_epfiles_destroy(struct ffs_epfile *epfiles, unsigned count)
-{
- struct ffs_epfile *epfile = epfiles;
-
- ENTER();
-
- for (; count; --count, ++epfile) {
- BUG_ON(mutex_is_locked(&epfile->mutex) ||
- waitqueue_active(&epfile->wait));
- if (epfile->dentry) {
- d_delete(epfile->dentry);
- dput(epfile->dentry);
- epfile->dentry = NULL;
- }
- }
-
- kfree(epfiles);
-}
-
-static int functionfs_bind_config(struct usb_composite_dev *cdev,
- struct usb_configuration *c,
- struct ffs_data *ffs)
-{
- struct ffs_function *func;
- int ret;
-
- ENTER();
-
- func = kzalloc(sizeof *func, GFP_KERNEL);
- if (unlikely(!func))
- return -ENOMEM;
-
- func->function.name = "Function FS Gadget";
- func->function.strings = ffs->stringtabs;
-
- func->function.bind = ffs_func_bind;
- func->function.unbind = ffs_func_unbind;
- func->function.set_alt = ffs_func_set_alt;
- func->function.disable = ffs_func_disable;
- func->function.setup = ffs_func_setup;
- func->function.suspend = ffs_func_suspend;
- func->function.resume = ffs_func_resume;
-
- func->conf = c;
- func->gadget = cdev->gadget;
- func->ffs = ffs;
- ffs_data_get(ffs);
-
- ret = usb_add_function(c, &func->function);
- if (unlikely(ret))
- ffs_func_free(func);
-
- return ret;
-}
-
-static void ffs_func_free(struct ffs_function *func)
-{
- struct ffs_ep *ep = func->eps;
- unsigned count = func->ffs->eps_count;
- unsigned long flags;
-
- ENTER();
-
- /* cleanup after autoconfig */
- spin_lock_irqsave(&func->ffs->eps_lock, flags);
- do {
- if (ep->ep && ep->req)
- usb_ep_free_request(ep->ep, ep->req);
- ep->req = NULL;
- ++ep;
- } while (--count);
- spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
-
- ffs_data_put(func->ffs);
-
- kfree(func->eps);
- /*
- * eps and interfaces_nums are allocated in the same chunk so
- * only one free is required. Descriptors are also allocated
- * in the same chunk.
- */
-
- kfree(func);
-}
-
-static void ffs_func_eps_disable(struct ffs_function *func)
-{
- struct ffs_ep *ep = func->eps;
- struct ffs_epfile *epfile = func->ffs->epfiles;
- unsigned count = func->ffs->eps_count;
- unsigned long flags;
-
- spin_lock_irqsave(&func->ffs->eps_lock, flags);
- do {
- /* pending requests get nuked */
- if (likely(ep->ep))
- usb_ep_disable(ep->ep);
- epfile->ep = NULL;
-
- ++ep;
- ++epfile;
- } while (--count);
- spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
-}
-
-static int ffs_func_eps_enable(struct ffs_function *func)
-{
- struct ffs_data *ffs = func->ffs;
- struct ffs_ep *ep = func->eps;
- struct ffs_epfile *epfile = ffs->epfiles;
- unsigned count = ffs->eps_count;
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&func->ffs->eps_lock, flags);
- do {
- struct usb_endpoint_descriptor *ds;
- ds = ep->descs[ep->descs[1] ? 1 : 0];
-
- ep->ep->driver_data = ep;
- ep->ep->desc = ds;
- ret = usb_ep_enable(ep->ep);
- if (likely(!ret)) {
- epfile->ep = ep;
- epfile->in = usb_endpoint_dir_in(ds);
- epfile->isoc = usb_endpoint_xfer_isoc(ds);
- } else {
- break;
- }
-
- wake_up(&epfile->wait);
-
- ++ep;
- ++epfile;
- } while (--count);
- spin_unlock_irqrestore(&func->ffs->eps_lock, flags);
-
- return ret;
-}
-
-
-/* Parsing and building descriptors and strings *****************************/
-
-/*
- * This validates if data pointed by data is a valid USB descriptor as
- * well as record how many interfaces, endpoints and strings are
- * required by given configuration. Returns address after the
- * descriptor or NULL if data is invalid.
- */
-
-enum ffs_entity_type {
- FFS_DESCRIPTOR, FFS_INTERFACE, FFS_STRING, FFS_ENDPOINT
-};
-
-typedef int (*ffs_entity_callback)(enum ffs_entity_type entity,
- u8 *valuep,
- struct usb_descriptor_header *desc,
- void *priv);
-
-static int __must_check ffs_do_desc(char *data, unsigned len,
- ffs_entity_callback entity, void *priv)
-{
- struct usb_descriptor_header *_ds = (void *)data;
- u8 length;
- int ret;
-
- ENTER();
-
- /* At least two bytes are required: length and type */
- if (len < 2) {
- pr_vdebug("descriptor too short\n");
- return -EINVAL;
- }
-
- /* If we have at least as many bytes as the descriptor takes? */
- length = _ds->bLength;
- if (len < length) {
- pr_vdebug("descriptor longer then available data\n");
- return -EINVAL;
- }
-
-#define __entity_check_INTERFACE(val) 1
-#define __entity_check_STRING(val) (val)
-#define __entity_check_ENDPOINT(val) ((val) & USB_ENDPOINT_NUMBER_MASK)
-#define __entity(type, val) do { \
- pr_vdebug("entity " #type "(%02x)\n", (val)); \
- if (unlikely(!__entity_check_ ##type(val))) { \
- pr_vdebug("invalid entity's value\n"); \
- return -EINVAL; \
- } \
- ret = entity(FFS_ ##type, &val, _ds, priv); \
- if (unlikely(ret < 0)) { \
- pr_debug("entity " #type "(%02x); ret = %d\n", \
- (val), ret); \
- return ret; \
- } \
- } while (0)
-
- /* Parse descriptor depending on type. */
- switch (_ds->bDescriptorType) {
- case USB_DT_DEVICE:
- case USB_DT_CONFIG:
- case USB_DT_STRING:
- case USB_DT_DEVICE_QUALIFIER:
- /* function can't have any of those */
- pr_vdebug("descriptor reserved for gadget: %d\n",
- _ds->bDescriptorType);
- return -EINVAL;
-
- case USB_DT_INTERFACE: {
- struct usb_interface_descriptor *ds = (void *)_ds;
- pr_vdebug("interface descriptor\n");
- if (length != sizeof *ds)
- goto inv_length;
-
- __entity(INTERFACE, ds->bInterfaceNumber);
- if (ds->iInterface)
- __entity(STRING, ds->iInterface);
- }
- break;
-
- case USB_DT_ENDPOINT: {
- struct usb_endpoint_descriptor *ds = (void *)_ds;
- pr_vdebug("endpoint descriptor\n");
- if (length != USB_DT_ENDPOINT_SIZE &&
- length != USB_DT_ENDPOINT_AUDIO_SIZE)
- goto inv_length;
- __entity(ENDPOINT, ds->bEndpointAddress);
- }
- break;
-
- case HID_DT_HID:
- pr_vdebug("hid descriptor\n");
- if (length != sizeof(struct hid_descriptor))
- goto inv_length;
- break;
-
- case USB_DT_OTG:
- if (length != sizeof(struct usb_otg_descriptor))
- goto inv_length;
- break;
-
- case USB_DT_INTERFACE_ASSOCIATION: {
- struct usb_interface_assoc_descriptor *ds = (void *)_ds;
- pr_vdebug("interface association descriptor\n");
- if (length != sizeof *ds)
- goto inv_length;
- if (ds->iFunction)
- __entity(STRING, ds->iFunction);
- }
- break;
-
- case USB_DT_OTHER_SPEED_CONFIG:
- case USB_DT_INTERFACE_POWER:
- case USB_DT_DEBUG:
- case USB_DT_SECURITY:
- case USB_DT_CS_RADIO_CONTROL:
- /* TODO */
- pr_vdebug("unimplemented descriptor: %d\n", _ds->bDescriptorType);
- return -EINVAL;
-
- default:
- /* We should never be here */
- pr_vdebug("unknown descriptor: %d\n", _ds->bDescriptorType);
- return -EINVAL;
-
-inv_length:
- pr_vdebug("invalid length: %d (descriptor %d)\n",
- _ds->bLength, _ds->bDescriptorType);
- return -EINVAL;
- }
-
-#undef __entity
-#undef __entity_check_DESCRIPTOR
-#undef __entity_check_INTERFACE
-#undef __entity_check_STRING
-#undef __entity_check_ENDPOINT
-
- return length;
-}
-
-static int __must_check ffs_do_descs(unsigned count, char *data, unsigned len,
- ffs_entity_callback entity, void *priv)
-{
- const unsigned _len = len;
- unsigned long num = 0;
-
- ENTER();
-
- for (;;) {
- int ret;
-
- if (num == count)
- data = NULL;
-
- /* Record "descriptor" entity */
- ret = entity(FFS_DESCRIPTOR, (u8 *)num, (void *)data, priv);
- if (unlikely(ret < 0)) {
- pr_debug("entity DESCRIPTOR(%02lx); ret = %d\n",
- num, ret);
- return ret;
- }
-
- if (!data)
- return _len - len;
-
- ret = ffs_do_desc(data, len, entity, priv);
- if (unlikely(ret < 0)) {
- pr_debug("%s returns %d\n", __func__, ret);
- return ret;
- }
-
- len -= ret;
- data += ret;
- ++num;
- }
-}
-
-static int __ffs_data_do_entity(enum ffs_entity_type type,
- u8 *valuep, struct usb_descriptor_header *desc,
- void *priv)
-{
- struct ffs_data *ffs = priv;
-
- ENTER();
-
- switch (type) {
- case FFS_DESCRIPTOR:
- break;
-
- case FFS_INTERFACE:
- /*
- * Interfaces are indexed from zero so if we
- * encountered interface "n" then there are at least
- * "n+1" interfaces.
- */
- if (*valuep >= ffs->interfaces_count)
- ffs->interfaces_count = *valuep + 1;
- break;
-
- case FFS_STRING:
- /*
- * Strings are indexed from 1 (0 is magic ;) reserved
- * for languages list or some such)
- */
- if (*valuep > ffs->strings_count)
- ffs->strings_count = *valuep;
- break;
-
- case FFS_ENDPOINT:
- /* Endpoints are indexed from 1 as well. */
- if ((*valuep & USB_ENDPOINT_NUMBER_MASK) > ffs->eps_count)
- ffs->eps_count = (*valuep & USB_ENDPOINT_NUMBER_MASK);
- break;
- }
-
- return 0;
-}
-
-static int __ffs_data_got_descs(struct ffs_data *ffs,
- char *const _data, size_t len)
-{
- unsigned fs_count, hs_count;
- int fs_len, ret = -EINVAL;
- char *data = _data;
-
- ENTER();
-
- if (unlikely(get_unaligned_le32(data) != FUNCTIONFS_DESCRIPTORS_MAGIC ||
- get_unaligned_le32(data + 4) != len))
- goto error;
- fs_count = get_unaligned_le32(data + 8);
- hs_count = get_unaligned_le32(data + 12);
-
- if (!fs_count && !hs_count)
- goto einval;
-
- data += 16;
- len -= 16;
-
- if (likely(fs_count)) {
- fs_len = ffs_do_descs(fs_count, data, len,
- __ffs_data_do_entity, ffs);
- if (unlikely(fs_len < 0)) {
- ret = fs_len;
- goto error;
- }
-
- data += fs_len;
- len -= fs_len;
- } else {
- fs_len = 0;
- }
-
- if (likely(hs_count)) {
- ret = ffs_do_descs(hs_count, data, len,
- __ffs_data_do_entity, ffs);
- if (unlikely(ret < 0))
- goto error;
- } else {
- ret = 0;
- }
-
- if (unlikely(len != ret))
- goto einval;
-
- ffs->raw_fs_descs_length = fs_len;
- ffs->raw_descs_length = fs_len + ret;
- ffs->raw_descs = _data;
- ffs->fs_descs_count = fs_count;
- ffs->hs_descs_count = hs_count;
-
- return 0;
-
-einval:
- ret = -EINVAL;
-error:
- kfree(_data);
- return ret;
-}
-
-static int __ffs_data_got_strings(struct ffs_data *ffs,
- char *const _data, size_t len)
-{
- u32 str_count, needed_count, lang_count;
- struct usb_gadget_strings **stringtabs, *t;
- struct usb_string *strings, *s;
- const char *data = _data;
-
- ENTER();
-
- if (unlikely(get_unaligned_le32(data) != FUNCTIONFS_STRINGS_MAGIC ||
- get_unaligned_le32(data + 4) != len))
- goto error;
- str_count = get_unaligned_le32(data + 8);
- lang_count = get_unaligned_le32(data + 12);
-
- /* if one is zero the other must be zero */
- if (unlikely(!str_count != !lang_count))
- goto error;
-
- /* Do we have at least as many strings as descriptors need? */
- needed_count = ffs->strings_count;
- if (unlikely(str_count < needed_count))
- goto error;
-
- /*
- * If we don't need any strings just return and free all
- * memory.
- */
- if (!needed_count) {
- kfree(_data);
- return 0;
- }
-
- /* Allocate everything in one chunk so there's less maintenance. */
- {
- struct {
- struct usb_gadget_strings *stringtabs[lang_count + 1];
- struct usb_gadget_strings stringtab[lang_count];
- struct usb_string strings[lang_count*(needed_count+1)];
- } *d;
- unsigned i = 0;
-
- d = kmalloc(sizeof *d, GFP_KERNEL);
- if (unlikely(!d)) {
- kfree(_data);
- return -ENOMEM;
- }
-
- stringtabs = d->stringtabs;
- t = d->stringtab;
- i = lang_count;
- do {
- *stringtabs++ = t++;
- } while (--i);
- *stringtabs = NULL;
-
- stringtabs = d->stringtabs;
- t = d->stringtab;
- s = d->strings;
- strings = s;
- }
-
- /* For each language */
- data += 16;
- len -= 16;
-
- do { /* lang_count > 0 so we can use do-while */
- unsigned needed = needed_count;
-
- if (unlikely(len < 3))
- goto error_free;
- t->language = get_unaligned_le16(data);
- t->strings = s;
- ++t;
-
- data += 2;
- len -= 2;
-
- /* For each string */
- do { /* str_count > 0 so we can use do-while */
- size_t length = strnlen(data, len);
-
- if (unlikely(length == len))
- goto error_free;
-
- /*
- * User may provide more strings then we need,
- * if that's the case we simply ignore the
- * rest
- */
- if (likely(needed)) {
- /*
- * s->id will be set while adding
- * function to configuration so for
- * now just leave garbage here.
- */
- s->s = data;
- --needed;
- ++s;
- }
-
- data += length + 1;
- len -= length + 1;
- } while (--str_count);
-
- s->id = 0; /* terminator */
- s->s = NULL;
- ++s;
-
- } while (--lang_count);
-
- /* Some garbage left? */
- if (unlikely(len))
- goto error_free;
-
- /* Done! */
- ffs->stringtabs = stringtabs;
- ffs->raw_strings = _data;
-
- return 0;
-
-error_free:
- kfree(stringtabs);
-error:
- kfree(_data);
- return -EINVAL;
-}
-
-
-/* Events handling and management *******************************************/
-
-static void __ffs_event_add(struct ffs_data *ffs,
- enum usb_functionfs_event_type type)
-{
- enum usb_functionfs_event_type rem_type1, rem_type2 = type;
- int neg = 0;
-
- /*
- * Abort any unhandled setup
- *
- * We do not need to worry about some cmpxchg() changing value
- * of ffs->setup_state without holding the lock because when
- * state is FFS_SETUP_PENDING cmpxchg() in several places in
- * the source does nothing.
- */
- if (ffs->setup_state == FFS_SETUP_PENDING)
- ffs->setup_state = FFS_SETUP_CANCELED;
-
- switch (type) {
- case FUNCTIONFS_RESUME:
- rem_type2 = FUNCTIONFS_SUSPEND;
- /* FALL THROUGH */
- case FUNCTIONFS_SUSPEND:
- case FUNCTIONFS_SETUP:
- rem_type1 = type;
- /* Discard all similar events */
- break;
-
- case FUNCTIONFS_BIND:
- case FUNCTIONFS_UNBIND:
- case FUNCTIONFS_DISABLE:
- case FUNCTIONFS_ENABLE:
- /* Discard everything other then power management. */
- rem_type1 = FUNCTIONFS_SUSPEND;
- rem_type2 = FUNCTIONFS_RESUME;
- neg = 1;
- break;
-
- default:
- BUG();
- }
-
- {
- u8 *ev = ffs->ev.types, *out = ev;
- unsigned n = ffs->ev.count;
- for (; n; --n, ++ev)
- if ((*ev == rem_type1 || *ev == rem_type2) == neg)
- *out++ = *ev;
- else
- pr_vdebug("purging event %d\n", *ev);
- ffs->ev.count = out - ffs->ev.types;
- }
-
- pr_vdebug("adding event %d\n", type);
- ffs->ev.types[ffs->ev.count++] = type;
- wake_up_locked(&ffs->ev.waitq);
-}
-
-static void ffs_event_add(struct ffs_data *ffs,
- enum usb_functionfs_event_type type)
-{
- unsigned long flags;
- spin_lock_irqsave(&ffs->ev.waitq.lock, flags);
- __ffs_event_add(ffs, type);
- spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
-}
-
-
-/* Bind/unbind USB function hooks *******************************************/
-
-static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep,
- struct usb_descriptor_header *desc,
- void *priv)
-{
- struct usb_endpoint_descriptor *ds = (void *)desc;
- struct ffs_function *func = priv;
- struct ffs_ep *ffs_ep;
-
- /*
- * If hs_descriptors is not NULL then we are reading hs
- * descriptors now
- */
- const int isHS = func->function.hs_descriptors != NULL;
- unsigned idx;
-
- if (type != FFS_DESCRIPTOR)
- return 0;
-
- if (isHS)
- func->function.hs_descriptors[(long)valuep] = desc;
- else
- func->function.descriptors[(long)valuep] = desc;
-
- if (!desc || desc->bDescriptorType != USB_DT_ENDPOINT)
- return 0;
-
- idx = (ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) - 1;
- ffs_ep = func->eps + idx;
-
- if (unlikely(ffs_ep->descs[isHS])) {
- pr_vdebug("two %sspeed descriptors for EP %d\n",
- isHS ? "high" : "full",
- ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
- return -EINVAL;
- }
- ffs_ep->descs[isHS] = ds;
-
- ffs_dump_mem(": Original ep desc", ds, ds->bLength);
- if (ffs_ep->ep) {
- ds->bEndpointAddress = ffs_ep->descs[0]->bEndpointAddress;
- if (!ds->wMaxPacketSize)
- ds->wMaxPacketSize = ffs_ep->descs[0]->wMaxPacketSize;
- } else {
- struct usb_request *req;
- struct usb_ep *ep;
-
- pr_vdebug("autoconfig\n");
- ep = usb_ep_autoconfig(func->gadget, ds);
- if (unlikely(!ep))
- return -ENOTSUPP;
- ep->driver_data = func->eps + idx;
-
- req = usb_ep_alloc_request(ep, GFP_KERNEL);
- if (unlikely(!req))
- return -ENOMEM;
-
- ffs_ep->ep = ep;
- ffs_ep->req = req;
- func->eps_revmap[ds->bEndpointAddress &
- USB_ENDPOINT_NUMBER_MASK] = idx + 1;
- }
- ffs_dump_mem(": Rewritten ep desc", ds, ds->bLength);
-
- return 0;
-}
-
-static int __ffs_func_bind_do_nums(enum ffs_entity_type type, u8 *valuep,
- struct usb_descriptor_header *desc,
- void *priv)
-{
- struct ffs_function *func = priv;
- unsigned idx;
- u8 newValue;
-
- switch (type) {
- default:
- case FFS_DESCRIPTOR:
- /* Handled in previous pass by __ffs_func_bind_do_descs() */
- return 0;
-
- case FFS_INTERFACE:
- idx = *valuep;
- if (func->interfaces_nums[idx] < 0) {
- int id = usb_interface_id(func->conf, &func->function);
- if (unlikely(id < 0))
- return id;
- func->interfaces_nums[idx] = id;
- }
- newValue = func->interfaces_nums[idx];
- break;
-
- case FFS_STRING:
- /* String' IDs are allocated when fsf_data is bound to cdev */
- newValue = func->ffs->stringtabs[0]->strings[*valuep - 1].id;
- break;
-
- case FFS_ENDPOINT:
- /*
- * USB_DT_ENDPOINT are handled in
- * __ffs_func_bind_do_descs().
- */
- if (desc->bDescriptorType == USB_DT_ENDPOINT)
- return 0;
-
- idx = (*valuep & USB_ENDPOINT_NUMBER_MASK) - 1;
- if (unlikely(!func->eps[idx].ep))
- return -EINVAL;
-
- {
- struct usb_endpoint_descriptor **descs;
- descs = func->eps[idx].descs;
- newValue = descs[descs[0] ? 0 : 1]->bEndpointAddress;
- }
- break;
- }
-
- pr_vdebug("%02x -> %02x\n", *valuep, newValue);
- *valuep = newValue;
- return 0;
-}
-
-static int ffs_func_bind(struct usb_configuration *c,
- struct usb_function *f)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
-
- const int full = !!func->ffs->fs_descs_count;
- const int high = gadget_is_dualspeed(func->gadget) &&
- func->ffs->hs_descs_count;
-
- int ret;
-
- /* Make it a single chunk, less management later on */
- struct {
- struct ffs_ep eps[ffs->eps_count];
- struct usb_descriptor_header
- *fs_descs[full ? ffs->fs_descs_count + 1 : 0];
- struct usb_descriptor_header
- *hs_descs[high ? ffs->hs_descs_count + 1 : 0];
- short inums[ffs->interfaces_count];
- char raw_descs[high ? ffs->raw_descs_length
- : ffs->raw_fs_descs_length];
- } *data;
-
- ENTER();
-
- /* Only high speed but not supported by gadget? */
- if (unlikely(!(full | high)))
- return -ENOTSUPP;
-
- /* Allocate */
- data = kmalloc(sizeof *data, GFP_KERNEL);
- if (unlikely(!data))
- return -ENOMEM;
-
- /* Zero */
- memset(data->eps, 0, sizeof data->eps);
- memcpy(data->raw_descs, ffs->raw_descs + 16, sizeof data->raw_descs);
- memset(data->inums, 0xff, sizeof data->inums);
- for (ret = ffs->eps_count; ret; --ret)
- data->eps[ret].num = -1;
-
- /* Save pointers */
- func->eps = data->eps;
- func->interfaces_nums = data->inums;
-
- /*
- * Go through all the endpoint descriptors and allocate
- * endpoints first, so that later we can rewrite the endpoint
- * numbers without worrying that it may be described later on.
- */
- if (likely(full)) {
- func->function.descriptors = data->fs_descs;
- ret = ffs_do_descs(ffs->fs_descs_count,
- data->raw_descs,
- sizeof data->raw_descs,
- __ffs_func_bind_do_descs, func);
- if (unlikely(ret < 0))
- goto error;
- } else {
- ret = 0;
- }
-
- if (likely(high)) {
- func->function.hs_descriptors = data->hs_descs;
- ret = ffs_do_descs(ffs->hs_descs_count,
- data->raw_descs + ret,
- (sizeof data->raw_descs) - ret,
- __ffs_func_bind_do_descs, func);
- }
-
- /*
- * Now handle interface numbers allocation and interface and
- * endpoint numbers rewriting. We can do that in one go
- * now.
- */
- ret = ffs_do_descs(ffs->fs_descs_count +
- (high ? ffs->hs_descs_count : 0),
- data->raw_descs, sizeof data->raw_descs,
- __ffs_func_bind_do_nums, func);
- if (unlikely(ret < 0))
- goto error;
-
- /* And we're done */
- ffs_event_add(ffs, FUNCTIONFS_BIND);
- return 0;
-
-error:
- /* XXX Do we need to release all claimed endpoints here? */
- return ret;
-}
-
-
-/* Other USB function hooks *************************************************/
-
-static void ffs_func_unbind(struct usb_configuration *c,
- struct usb_function *f)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
-
- ENTER();
-
- if (ffs->func == func) {
- ffs_func_eps_disable(func);
- ffs->func = NULL;
- }
-
- ffs_event_add(ffs, FUNCTIONFS_UNBIND);
-
- ffs_func_free(func);
-}
-
-static int ffs_func_set_alt(struct usb_function *f,
- unsigned interface, unsigned alt)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
- int ret = 0, intf;
-
- if (alt != (unsigned)-1) {
- intf = ffs_func_revmap_intf(func, interface);
- if (unlikely(intf < 0))
- return intf;
- }
-
- if (ffs->func)
- ffs_func_eps_disable(ffs->func);
-
- if (ffs->state != FFS_ACTIVE)
- return -ENODEV;
-
- if (alt == (unsigned)-1) {
- ffs->func = NULL;
- ffs_event_add(ffs, FUNCTIONFS_DISABLE);
- return 0;
- }
-
- ffs->func = func;
- ret = ffs_func_eps_enable(func);
- if (likely(ret >= 0))
- ffs_event_add(ffs, FUNCTIONFS_ENABLE);
- return ret;
-}
-
-static void ffs_func_disable(struct usb_function *f)
-{
- ffs_func_set_alt(f, 0, (unsigned)-1);
-}
-
-static int ffs_func_setup(struct usb_function *f,
- const struct usb_ctrlrequest *creq)
-{
- struct ffs_function *func = ffs_func_from_usb(f);
- struct ffs_data *ffs = func->ffs;
- unsigned long flags;
- int ret;
-
- ENTER();
-
- pr_vdebug("creq->bRequestType = %02x\n", creq->bRequestType);
- pr_vdebug("creq->bRequest = %02x\n", creq->bRequest);
- pr_vdebug("creq->wValue = %04x\n", le16_to_cpu(creq->wValue));
- pr_vdebug("creq->wIndex = %04x\n", le16_to_cpu(creq->wIndex));
- pr_vdebug("creq->wLength = %04x\n", le16_to_cpu(creq->wLength));
-
- /*
- * Most requests directed to interface go through here
- * (notable exceptions are set/get interface) so we need to
- * handle them. All other either handled by composite or
- * passed to usb_configuration->setup() (if one is set). No
- * matter, we will handle requests directed to endpoint here
- * as well (as it's straightforward) but what to do with any
- * other request?
- */
- if (ffs->state != FFS_ACTIVE)
- return -ENODEV;
-
- switch (creq->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_INTERFACE:
- ret = ffs_func_revmap_intf(func, le16_to_cpu(creq->wIndex));
- if (unlikely(ret < 0))
- return ret;
- break;
-
- case USB_RECIP_ENDPOINT:
- ret = ffs_func_revmap_ep(func, le16_to_cpu(creq->wIndex));
- if (unlikely(ret < 0))
- return ret;
- break;
-
- default:
- return -EOPNOTSUPP;
- }
-
- spin_lock_irqsave(&ffs->ev.waitq.lock, flags);
- ffs->ev.setup = *creq;
- ffs->ev.setup.wIndex = cpu_to_le16(ret);
- __ffs_event_add(ffs, FUNCTIONFS_SETUP);
- spin_unlock_irqrestore(&ffs->ev.waitq.lock, flags);
-
- return 0;
-}
-
-static void ffs_func_suspend(struct usb_function *f)
-{
- ENTER();
- ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_SUSPEND);
-}
-
-static void ffs_func_resume(struct usb_function *f)
-{
- ENTER();
- ffs_event_add(ffs_func_from_usb(f)->ffs, FUNCTIONFS_RESUME);
-}
-
-
-/* Endpoint and interface numbers reverse mapping ***************************/
-
-static int ffs_func_revmap_ep(struct ffs_function *func, u8 num)
-{
- num = func->eps_revmap[num & USB_ENDPOINT_NUMBER_MASK];
- return num ? num : -EDOM;
-}
-
-static int ffs_func_revmap_intf(struct ffs_function *func, u8 intf)
-{
- short *nums = func->interfaces_nums;
- unsigned count = func->ffs->interfaces_count;
-
- for (; count; --count, ++nums) {
- if (*nums >= 0 && *nums == intf)
- return nums - func->interfaces_nums;
- }
-
- return -EDOM;
-}
-
-
-/* Misc helper functions ****************************************************/
-
-static int ffs_mutex_lock(struct mutex *mutex, unsigned nonblock)
-{
- return nonblock
- ? likely(mutex_trylock(mutex)) ? 0 : -EAGAIN
- : mutex_lock_interruptible(mutex);
-}
-
-static char *ffs_prepare_buffer(const char * __user buf, size_t len)
-{
- char *data;
-
- if (unlikely(!len))
- return NULL;
-
- data = kmalloc(len, GFP_KERNEL);
- if (unlikely(!data))
- return ERR_PTR(-ENOMEM);
-
- if (unlikely(__copy_from_user(data, buf, len))) {
- kfree(data);
- return ERR_PTR(-EFAULT);
- }
-
- pr_vdebug("Buffer from user space:\n");
- ffs_dump_mem("", data, len);
-
- return data;
-}
+++ /dev/null
-/*
- * f_mass_storage.c -- Mass Storage USB Composite Function
- *
- * Copyright (C) 2003-2008 Alan Stern
- * Copyright (C) 2009 Samsung Electronics
- * Author: Michal Nazarewicz <mina86@mina86.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation, either version 2 of that License or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * The Mass Storage Function acts as a USB Mass Storage device,
- * appearing to the host as a disk drive or as a CD-ROM drive. In
- * addition to providing an example of a genuinely useful composite
- * function for a USB device, it also illustrates a technique of
- * double-buffering for increased throughput.
- *
- * For more information about MSF and in particular its module
- * parameters and sysfs interface read the
- * <Documentation/usb/mass-storage.txt> file.
- */
-
-/*
- * MSF is configured by specifying a fsg_config structure. It has the
- * following fields:
- *
- * nluns Number of LUNs function have (anywhere from 1
- * to FSG_MAX_LUNS which is 8).
- * luns An array of LUN configuration values. This
- * should be filled for each LUN that
- * function will include (ie. for "nluns"
- * LUNs). Each element of the array has
- * the following fields:
- * ->filename The path to the backing file for the LUN.
- * Required if LUN is not marked as
- * removable.
- * ->ro Flag specifying access to the LUN shall be
- * read-only. This is implied if CD-ROM
- * emulation is enabled as well as when
- * it was impossible to open "filename"
- * in R/W mode.
- * ->removable Flag specifying that LUN shall be indicated as
- * being removable.
- * ->cdrom Flag specifying that LUN shall be reported as
- * being a CD-ROM.
- * ->nofua Flag specifying that FUA flag in SCSI WRITE(10,12)
- * commands for this LUN shall be ignored.
- *
- * vendor_name
- * product_name
- * release Information used as a reply to INQUIRY
- * request. To use default set to NULL,
- * NULL, 0xffff respectively. The first
- * field should be 8 and the second 16
- * characters or less.
- *
- * can_stall Set to permit function to halt bulk endpoints.
- * Disabled on some USB devices known not
- * to work correctly. You should set it
- * to true.
- *
- * If "removable" is not set for a LUN then a backing file must be
- * specified. If it is set, then NULL filename means the LUN's medium
- * is not loaded (an empty string as "filename" in the fsg_config
- * structure causes error). The CD-ROM emulation includes a single
- * data track and no audio tracks; hence there need be only one
- * backing file per LUN.
- *
- * This function is heavily based on "File-backed Storage Gadget" by
- * Alan Stern which in turn is heavily based on "Gadget Zero" by David
- * Brownell. The driver's SCSI command interface was based on the
- * "Information technology - Small Computer System Interface - 2"
- * document from X3T9.2 Project 375D, Revision 10L, 7-SEP-93,
- * available at <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>.
- * The single exception is opcode 0x23 (READ FORMAT CAPACITIES), which
- * was based on the "Universal Serial Bus Mass Storage Class UFI
- * Command Specification" document, Revision 1.0, December 14, 1998,
- * available at
- * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>.
- */
-
-/*
- * Driver Design
- *
- * The MSF is fairly straightforward. There is a main kernel
- * thread that handles most of the work. Interrupt routines field
- * callbacks from the controller driver: bulk- and interrupt-request
- * completion notifications, endpoint-0 events, and disconnect events.
- * Completion events are passed to the main thread by wakeup calls. Many
- * ep0 requests are handled at interrupt time, but SetInterface,
- * SetConfiguration, and device reset requests are forwarded to the
- * thread in the form of "exceptions" using SIGUSR1 signals (since they
- * should interrupt any ongoing file I/O operations).
- *
- * The thread's main routine implements the standard command/data/status
- * parts of a SCSI interaction. It and its subroutines are full of tests
- * for pending signals/exceptions -- all this polling is necessary since
- * the kernel has no setjmp/longjmp equivalents. (Maybe this is an
- * indication that the driver really wants to be running in userspace.)
- * An important point is that so long as the thread is alive it keeps an
- * open reference to the backing file. This will prevent unmounting
- * the backing file's underlying filesystem and could cause problems
- * during system shutdown, for example. To prevent such problems, the
- * thread catches INT, TERM, and KILL signals and converts them into
- * an EXIT exception.
- *
- * In normal operation the main thread is started during the gadget's
- * fsg_bind() callback and stopped during fsg_unbind(). But it can
- * also exit when it receives a signal, and there's no point leaving
- * the gadget running when the thread is dead. As of this moment, MSF
- * provides no way to deregister the gadget when thread dies -- maybe
- * a callback functions is needed.
- *
- * To provide maximum throughput, the driver uses a circular pipeline of
- * buffer heads (struct fsg_buffhd). In principle the pipeline can be
- * arbitrarily long; in practice the benefits don't justify having more
- * than 2 stages (i.e., double buffering). But it helps to think of the
- * pipeline as being a long one. Each buffer head contains a bulk-in and
- * a bulk-out request pointer (since the buffer can be used for both
- * output and input -- directions always are given from the host's
- * point of view) as well as a pointer to the buffer and various state
- * variables.
- *
- * Use of the pipeline follows a simple protocol. There is a variable
- * (fsg->next_buffhd_to_fill) that points to the next buffer head to use.
- * At any time that buffer head may still be in use from an earlier
- * request, so each buffer head has a state variable indicating whether
- * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the
- * buffer head to be EMPTY, filling the buffer either by file I/O or by
- * USB I/O (during which the buffer head is BUSY), and marking the buffer
- * head FULL when the I/O is complete. Then the buffer will be emptied
- * (again possibly by USB I/O, during which it is marked BUSY) and
- * finally marked EMPTY again (possibly by a completion routine).
- *
- * A module parameter tells the driver to avoid stalling the bulk
- * endpoints wherever the transport specification allows. This is
- * necessary for some UDCs like the SuperH, which cannot reliably clear a
- * halt on a bulk endpoint. However, under certain circumstances the
- * Bulk-only specification requires a stall. In such cases the driver
- * will halt the endpoint and set a flag indicating that it should clear
- * the halt in software during the next device reset. Hopefully this
- * will permit everything to work correctly. Furthermore, although the
- * specification allows the bulk-out endpoint to halt when the host sends
- * too much data, implementing this would cause an unavoidable race.
- * The driver will always use the "no-stall" approach for OUT transfers.
- *
- * One subtle point concerns sending status-stage responses for ep0
- * requests. Some of these requests, such as device reset, can involve
- * interrupting an ongoing file I/O operation, which might take an
- * arbitrarily long time. During that delay the host might give up on
- * the original ep0 request and issue a new one. When that happens the
- * driver should not notify the host about completion of the original
- * request, as the host will no longer be waiting for it. So the driver
- * assigns to each ep0 request a unique tag, and it keeps track of the
- * tag value of the request associated with a long-running exception
- * (device-reset, interface-change, or configuration-change). When the
- * exception handler is finished, the status-stage response is submitted
- * only if the current ep0 request tag is equal to the exception request
- * tag. Thus only the most recently received ep0 request will get a
- * status-stage response.
- *
- * Warning: This driver source file is too long. It ought to be split up
- * into a header file plus about 3 separate .c files, to handle the details
- * of the Gadget, USB Mass Storage, and SCSI protocols.
- */
-
-
-/* #define VERBOSE_DEBUG */
-/* #define DUMP_MSGS */
-
-#include <linux/blkdev.h>
-#include <linux/completion.h>
-#include <linux/dcache.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/fcntl.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/kref.h>
-#include <linux/kthread.h>
-#include <linux/limits.h>
-#include <linux/rwsem.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/string.h>
-#include <linux/freezer.h>
-#include <linux/utsname.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/composite.h>
-
-#include "gadget_chips.h"
-
-
-/*------------------------------------------------------------------------*/
-
-#define FSG_DRIVER_DESC "Mass Storage Function"
-#define FSG_DRIVER_VERSION "2009/09/11"
-
-static const char fsg_string_interface[] = "Mass Storage";
-
-#define FSG_NO_DEVICE_STRINGS 1
-#define FSG_NO_OTG 1
-#define FSG_NO_INTR_EP 1
-
-#include "storage_common.c"
-
-
-/*-------------------------------------------------------------------------*/
-
-struct fsg_dev;
-struct fsg_common;
-
-/* FSF callback functions */
-struct fsg_operations {
- /*
- * Callback function to call when thread exits. If no
- * callback is set or it returns value lower then zero MSF
- * will force eject all LUNs it operates on (including those
- * marked as non-removable or with prevent_medium_removal flag
- * set).
- */
- int (*thread_exits)(struct fsg_common *common);
-
- /*
- * Called prior to ejection. Negative return means error,
- * zero means to continue with ejection, positive means not to
- * eject.
- */
- int (*pre_eject)(struct fsg_common *common,
- struct fsg_lun *lun, int num);
- /*
- * Called after ejection. Negative return means error, zero
- * or positive is just a success.
- */
- int (*post_eject)(struct fsg_common *common,
- struct fsg_lun *lun, int num);
-};
-
-/* Data shared by all the FSG instances. */
-struct fsg_common {
- struct usb_gadget *gadget;
- struct usb_composite_dev *cdev;
- struct fsg_dev *fsg, *new_fsg;
- wait_queue_head_t fsg_wait;
-
- /* filesem protects: backing files in use */
- struct rw_semaphore filesem;
-
- /* lock protects: state, all the req_busy's */
- spinlock_t lock;
-
- struct usb_ep *ep0; /* Copy of gadget->ep0 */
- struct usb_request *ep0req; /* Copy of cdev->req */
- unsigned int ep0_req_tag;
-
- struct fsg_buffhd *next_buffhd_to_fill;
- struct fsg_buffhd *next_buffhd_to_drain;
- struct fsg_buffhd *buffhds;
-
- int cmnd_size;
- u8 cmnd[MAX_COMMAND_SIZE];
-
- unsigned int nluns;
- unsigned int lun;
- struct fsg_lun *luns;
- struct fsg_lun *curlun;
-
- unsigned int bulk_out_maxpacket;
- enum fsg_state state; /* For exception handling */
- unsigned int exception_req_tag;
-
- enum data_direction data_dir;
- u32 data_size;
- u32 data_size_from_cmnd;
- u32 tag;
- u32 residue;
- u32 usb_amount_left;
-
- unsigned int can_stall:1;
- unsigned int free_storage_on_release:1;
- unsigned int phase_error:1;
- unsigned int short_packet_received:1;
- unsigned int bad_lun_okay:1;
- unsigned int running:1;
-
- int thread_wakeup_needed;
- struct completion thread_notifier;
- struct task_struct *thread_task;
-
- /* Callback functions. */
- const struct fsg_operations *ops;
- /* Gadget's private data. */
- void *private_data;
-
- /*
- * Vendor (8 chars), product (16 chars), release (4
- * hexadecimal digits) and NUL byte
- */
- char inquiry_string[8 + 16 + 4 + 1];
-
- struct kref ref;
-};
-
-struct fsg_config {
- unsigned nluns;
- struct fsg_lun_config {
- const char *filename;
- char ro;
- char removable;
- char cdrom;
- char nofua;
- } luns[FSG_MAX_LUNS];
-
- /* Callback functions. */
- const struct fsg_operations *ops;
- /* Gadget's private data. */
- void *private_data;
-
- const char *vendor_name; /* 8 characters or less */
- const char *product_name; /* 16 characters or less */
- u16 release;
-
- char can_stall;
-};
-
-struct fsg_dev {
- struct usb_function function;
- struct usb_gadget *gadget; /* Copy of cdev->gadget */
- struct fsg_common *common;
-
- u16 interface_number;
-
- unsigned int bulk_in_enabled:1;
- unsigned int bulk_out_enabled:1;
-
- unsigned long atomic_bitflags;
-#define IGNORE_BULK_OUT 0
-
- struct usb_ep *bulk_in;
- struct usb_ep *bulk_out;
-};
-
-static inline int __fsg_is_set(struct fsg_common *common,
- const char *func, unsigned line)
-{
- if (common->fsg)
- return 1;
- ERROR(common, "common->fsg is NULL in %s at %u\n", func, line);
- WARN_ON(1);
- return 0;
-}
-
-#define fsg_is_set(common) likely(__fsg_is_set(common, __func__, __LINE__))
-
-static inline struct fsg_dev *fsg_from_func(struct usb_function *f)
-{
- return container_of(f, struct fsg_dev, function);
-}
-
-typedef void (*fsg_routine_t)(struct fsg_dev *);
-
-static int exception_in_progress(struct fsg_common *common)
-{
- return common->state > FSG_STATE_IDLE;
-}
-
-/* Make bulk-out requests be divisible by the maxpacket size */
-static void set_bulk_out_req_length(struct fsg_common *common,
- struct fsg_buffhd *bh, unsigned int length)
-{
- unsigned int rem;
-
- bh->bulk_out_intended_length = length;
- rem = length % common->bulk_out_maxpacket;
- if (rem > 0)
- length += common->bulk_out_maxpacket - rem;
- bh->outreq->length = length;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
-{
- const char *name;
-
- if (ep == fsg->bulk_in)
- name = "bulk-in";
- else if (ep == fsg->bulk_out)
- name = "bulk-out";
- else
- name = ep->name;
- DBG(fsg, "%s set halt\n", name);
- return usb_ep_set_halt(ep);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* These routines may be called in process context or in_irq */
-
-/* Caller must hold fsg->lock */
-static void wakeup_thread(struct fsg_common *common)
-{
- /* Tell the main thread that something has happened */
- common->thread_wakeup_needed = 1;
- if (common->thread_task)
- wake_up_process(common->thread_task);
-}
-
-static void raise_exception(struct fsg_common *common, enum fsg_state new_state)
-{
- unsigned long flags;
-
- /*
- * Do nothing if a higher-priority exception is already in progress.
- * If a lower-or-equal priority exception is in progress, preempt it
- * and notify the main thread by sending it a signal.
- */
- spin_lock_irqsave(&common->lock, flags);
- if (common->state <= new_state) {
- common->exception_req_tag = common->ep0_req_tag;
- common->state = new_state;
- if (common->thread_task)
- send_sig_info(SIGUSR1, SEND_SIG_FORCED,
- common->thread_task);
- }
- spin_unlock_irqrestore(&common->lock, flags);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int ep0_queue(struct fsg_common *common)
-{
- int rc;
-
- rc = usb_ep_queue(common->ep0, common->ep0req, GFP_ATOMIC);
- common->ep0->driver_data = common;
- if (rc != 0 && rc != -ESHUTDOWN) {
- /* We can't do much more than wait for a reset */
- WARNING(common, "error in submission: %s --> %d\n",
- common->ep0->name, rc);
- }
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* Completion handlers. These always run in_irq. */
-
-static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct fsg_common *common = ep->driver_data;
- struct fsg_buffhd *bh = req->context;
-
- if (req->status || req->actual != req->length)
- DBG(common, "%s --> %d, %u/%u\n", __func__,
- req->status, req->actual, req->length);
- if (req->status == -ECONNRESET) /* Request was cancelled */
- usb_ep_fifo_flush(ep);
-
- /* Hold the lock while we update the request and buffer states */
- smp_wmb();
- spin_lock(&common->lock);
- bh->inreq_busy = 0;
- bh->state = BUF_STATE_EMPTY;
- wakeup_thread(common);
- spin_unlock(&common->lock);
-}
-
-static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct fsg_common *common = ep->driver_data;
- struct fsg_buffhd *bh = req->context;
-
- dump_msg(common, "bulk-out", req->buf, req->actual);
- if (req->status || req->actual != bh->bulk_out_intended_length)
- DBG(common, "%s --> %d, %u/%u\n", __func__,
- req->status, req->actual, bh->bulk_out_intended_length);
- if (req->status == -ECONNRESET) /* Request was cancelled */
- usb_ep_fifo_flush(ep);
-
- /* Hold the lock while we update the request and buffer states */
- smp_wmb();
- spin_lock(&common->lock);
- bh->outreq_busy = 0;
- bh->state = BUF_STATE_FULL;
- wakeup_thread(common);
- spin_unlock(&common->lock);
-}
-
-static int fsg_setup(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- struct usb_request *req = fsg->common->ep0req;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- if (!fsg_is_set(fsg->common))
- return -EOPNOTSUPP;
-
- ++fsg->common->ep0_req_tag; /* Record arrival of a new request */
- req->context = NULL;
- req->length = 0;
- dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
-
- switch (ctrl->bRequest) {
-
- case US_BULK_RESET_REQUEST:
- if (ctrl->bRequestType !=
- (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != fsg->interface_number || w_value != 0 ||
- w_length != 0)
- return -EDOM;
-
- /*
- * Raise an exception to stop the current operation
- * and reinitialize our state.
- */
- DBG(fsg, "bulk reset request\n");
- raise_exception(fsg->common, FSG_STATE_RESET);
- return DELAYED_STATUS;
-
- case US_BULK_GET_MAX_LUN:
- if (ctrl->bRequestType !=
- (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
- break;
- if (w_index != fsg->interface_number || w_value != 0 ||
- w_length != 1)
- return -EDOM;
- VDBG(fsg, "get max LUN\n");
- *(u8 *)req->buf = fsg->common->nluns - 1;
-
- /* Respond with data/status */
- req->length = min((u16)1, w_length);
- return ep0_queue(fsg->common);
- }
-
- VDBG(fsg,
- "unknown class-specific control req %02x.%02x v%04x i%04x l%u\n",
- ctrl->bRequestType, ctrl->bRequest,
- le16_to_cpu(ctrl->wValue), w_index, w_length);
- return -EOPNOTSUPP;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/* All the following routines run in process context */
-
-/* Use this for bulk or interrupt transfers, not ep0 */
-static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
- struct usb_request *req, int *pbusy,
- enum fsg_buffer_state *state)
-{
- int rc;
-
- if (ep == fsg->bulk_in)
- dump_msg(fsg, "bulk-in", req->buf, req->length);
-
- spin_lock_irq(&fsg->common->lock);
- *pbusy = 1;
- *state = BUF_STATE_BUSY;
- spin_unlock_irq(&fsg->common->lock);
- rc = usb_ep_queue(ep, req, GFP_KERNEL);
- if (rc != 0) {
- *pbusy = 0;
- *state = BUF_STATE_EMPTY;
-
- /* We can't do much more than wait for a reset */
-
- /*
- * Note: currently the net2280 driver fails zero-length
- * submissions if DMA is enabled.
- */
- if (rc != -ESHUTDOWN &&
- !(rc == -EOPNOTSUPP && req->length == 0))
- WARNING(fsg, "error in submission: %s --> %d\n",
- ep->name, rc);
- }
-}
-
-static bool start_in_transfer(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- if (!fsg_is_set(common))
- return false;
- start_transfer(common->fsg, common->fsg->bulk_in,
- bh->inreq, &bh->inreq_busy, &bh->state);
- return true;
-}
-
-static bool start_out_transfer(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- if (!fsg_is_set(common))
- return false;
- start_transfer(common->fsg, common->fsg->bulk_out,
- bh->outreq, &bh->outreq_busy, &bh->state);
- return true;
-}
-
-static int sleep_thread(struct fsg_common *common)
-{
- int rc = 0;
-
- /* Wait until a signal arrives or we are woken up */
- for (;;) {
- try_to_freeze();
- set_current_state(TASK_INTERRUPTIBLE);
- if (signal_pending(current)) {
- rc = -EINTR;
- break;
- }
- if (common->thread_wakeup_needed)
- break;
- schedule();
- }
- __set_current_state(TASK_RUNNING);
- common->thread_wakeup_needed = 0;
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_read(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba;
- struct fsg_buffhd *bh;
- int rc;
- u32 amount_left;
- loff_t file_offset, file_offset_tmp;
- unsigned int amount;
- ssize_t nread;
-
- /*
- * Get the starting Logical Block Address and check that it's
- * not too big.
- */
- if (common->cmnd[0] == READ_6)
- lba = get_unaligned_be24(&common->cmnd[1]);
- else {
- lba = get_unaligned_be32(&common->cmnd[2]);
-
- /*
- * We allow DPO (Disable Page Out = don't save data in the
- * cache) and FUA (Force Unit Access = don't read from the
- * cache), but we don't implement them.
- */
- if ((common->cmnd[1] & ~0x18) != 0) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- }
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
- file_offset = ((loff_t) lba) << curlun->blkbits;
-
- /* Carry out the file reads */
- amount_left = common->data_size_from_cmnd;
- if (unlikely(amount_left == 0))
- return -EIO; /* No default reply */
-
- for (;;) {
- /*
- * Figure out how much we need to read:
- * Try to read the remaining amount.
- * But don't read more than the buffer size.
- * And don't try to read past the end of the file.
- */
- amount = min(amount_left, FSG_BUFLEN);
- amount = min((loff_t)amount,
- curlun->file_length - file_offset);
-
- /* Wait for the next buffer to become available */
- bh = common->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
-
- /*
- * If we were asked to read past the end of file,
- * end with an empty buffer.
- */
- if (amount == 0) {
- curlun->sense_data =
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- bh->inreq->length = 0;
- bh->state = BUF_STATE_FULL;
- break;
- }
-
- /* Perform the read */
- file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *)bh->buf,
- amount, &file_offset_tmp);
- VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
- (unsigned long long)file_offset, (int)nread);
- if (signal_pending(current))
- return -EINTR;
-
- if (nread < 0) {
- LDBG(curlun, "error in file read: %d\n", (int)nread);
- nread = 0;
- } else if (nread < amount) {
- LDBG(curlun, "partial file read: %d/%u\n",
- (int)nread, amount);
- nread = round_down(nread, curlun->blksize);
- }
- file_offset += nread;
- amount_left -= nread;
- common->residue -= nread;
-
- /*
- * Except at the end of the transfer, nread will be
- * equal to the buffer size, which is divisible by the
- * bulk-in maxpacket size.
- */
- bh->inreq->length = nread;
- bh->state = BUF_STATE_FULL;
-
- /* If an error occurred, report it and its position */
- if (nread < amount) {
- curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- if (amount_left == 0)
- break; /* No more left to read */
-
- /* Send this buffer and go read some more */
- bh->inreq->zero = 0;
- if (!start_in_transfer(common, bh))
- /* Don't know what to do if common->fsg is NULL */
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
- }
-
- return -EIO; /* No default reply */
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_write(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba;
- struct fsg_buffhd *bh;
- int get_some_more;
- u32 amount_left_to_req, amount_left_to_write;
- loff_t usb_offset, file_offset, file_offset_tmp;
- unsigned int amount;
- ssize_t nwritten;
- int rc;
-
- if (curlun->ro) {
- curlun->sense_data = SS_WRITE_PROTECTED;
- return -EINVAL;
- }
- spin_lock(&curlun->filp->f_lock);
- curlun->filp->f_flags &= ~O_SYNC; /* Default is not to wait */
- spin_unlock(&curlun->filp->f_lock);
-
- /*
- * Get the starting Logical Block Address and check that it's
- * not too big
- */
- if (common->cmnd[0] == WRITE_6)
- lba = get_unaligned_be24(&common->cmnd[1]);
- else {
- lba = get_unaligned_be32(&common->cmnd[2]);
-
- /*
- * We allow DPO (Disable Page Out = don't save data in the
- * cache) and FUA (Force Unit Access = write directly to the
- * medium). We don't implement DPO; we implement FUA by
- * performing synchronous output.
- */
- if (common->cmnd[1] & ~0x18) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- if (!curlun->nofua && (common->cmnd[1] & 0x08)) { /* FUA */
- spin_lock(&curlun->filp->f_lock);
- curlun->filp->f_flags |= O_SYNC;
- spin_unlock(&curlun->filp->f_lock);
- }
- }
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
-
- /* Carry out the file writes */
- get_some_more = 1;
- file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits;
- amount_left_to_req = common->data_size_from_cmnd;
- amount_left_to_write = common->data_size_from_cmnd;
-
- while (amount_left_to_write > 0) {
-
- /* Queue a request for more data from the host */
- bh = common->next_buffhd_to_fill;
- if (bh->state == BUF_STATE_EMPTY && get_some_more) {
-
- /*
- * Figure out how much we want to get:
- * Try to get the remaining amount,
- * but not more than the buffer size.
- */
- amount = min(amount_left_to_req, FSG_BUFLEN);
-
- /* Beyond the end of the backing file? */
- if (usb_offset >= curlun->file_length) {
- get_some_more = 0;
- curlun->sense_data =
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- curlun->sense_data_info =
- usb_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- continue;
- }
-
- /* Get the next buffer */
- usb_offset += amount;
- common->usb_amount_left -= amount;
- amount_left_to_req -= amount;
- if (amount_left_to_req == 0)
- get_some_more = 0;
-
- /*
- * Except at the end of the transfer, amount will be
- * equal to the buffer size, which is divisible by
- * the bulk-out maxpacket size.
- */
- set_bulk_out_req_length(common, bh, amount);
- if (!start_out_transfer(common, bh))
- /* Dunno what to do if common->fsg is NULL */
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
- continue;
- }
-
- /* Write the received data to the backing file */
- bh = common->next_buffhd_to_drain;
- if (bh->state == BUF_STATE_EMPTY && !get_some_more)
- break; /* We stopped early */
- if (bh->state == BUF_STATE_FULL) {
- smp_rmb();
- common->next_buffhd_to_drain = bh->next;
- bh->state = BUF_STATE_EMPTY;
-
- /* Did something go wrong with the transfer? */
- if (bh->outreq->status != 0) {
- curlun->sense_data = SS_COMMUNICATION_FAILURE;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- amount = bh->outreq->actual;
- if (curlun->file_length - file_offset < amount) {
- LERROR(curlun,
- "write %u @ %llu beyond end %llu\n",
- amount, (unsigned long long)file_offset,
- (unsigned long long)curlun->file_length);
- amount = curlun->file_length - file_offset;
- }
-
- /* Don't accept excess data. The spec doesn't say
- * what to do in this case. We'll ignore the error.
- */
- amount = min(amount, bh->bulk_out_intended_length);
-
- /* Don't write a partial block */
- amount = round_down(amount, curlun->blksize);
- if (amount == 0)
- goto empty_write;
-
- /* Perform the write */
- file_offset_tmp = file_offset;
- nwritten = vfs_write(curlun->filp,
- (char __user *)bh->buf,
- amount, &file_offset_tmp);
- VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
- (unsigned long long)file_offset, (int)nwritten);
- if (signal_pending(current))
- return -EINTR; /* Interrupted! */
-
- if (nwritten < 0) {
- LDBG(curlun, "error in file write: %d\n",
- (int)nwritten);
- nwritten = 0;
- } else if (nwritten < amount) {
- LDBG(curlun, "partial file write: %d/%u\n",
- (int)nwritten, amount);
- nwritten = round_down(nwritten, curlun->blksize);
- }
- file_offset += nwritten;
- amount_left_to_write -= nwritten;
- common->residue -= nwritten;
-
- /* If an error occurred, report it and its position */
- if (nwritten < amount) {
- curlun->sense_data = SS_WRITE_ERROR;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- empty_write:
- /* Did the host decide to stop early? */
- if (bh->outreq->actual < bh->bulk_out_intended_length) {
- common->short_packet_received = 1;
- break;
- }
- continue;
- }
-
- /* Wait for something to happen */
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
-
- return -EIO; /* No default reply */
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_synchronize_cache(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- int rc;
-
- /* We ignore the requested LBA and write out all file's
- * dirty data buffers. */
- rc = fsg_lun_fsync_sub(curlun);
- if (rc)
- curlun->sense_data = SS_WRITE_ERROR;
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static void invalidate_sub(struct fsg_lun *curlun)
-{
- struct file *filp = curlun->filp;
- struct inode *inode = file_inode(filp);
- unsigned long rc;
-
- rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
- VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
-}
-
-static int do_verify(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba;
- u32 verification_length;
- struct fsg_buffhd *bh = common->next_buffhd_to_fill;
- loff_t file_offset, file_offset_tmp;
- u32 amount_left;
- unsigned int amount;
- ssize_t nread;
-
- /*
- * Get the starting Logical Block Address and check that it's
- * not too big.
- */
- lba = get_unaligned_be32(&common->cmnd[2]);
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
-
- /*
- * We allow DPO (Disable Page Out = don't save data in the
- * cache) but we don't implement it.
- */
- if (common->cmnd[1] & ~0x10) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- verification_length = get_unaligned_be16(&common->cmnd[7]);
- if (unlikely(verification_length == 0))
- return -EIO; /* No default reply */
-
- /* Prepare to carry out the file verify */
- amount_left = verification_length << curlun->blkbits;
- file_offset = ((loff_t) lba) << curlun->blkbits;
-
- /* Write out all the dirty buffers before invalidating them */
- fsg_lun_fsync_sub(curlun);
- if (signal_pending(current))
- return -EINTR;
-
- invalidate_sub(curlun);
- if (signal_pending(current))
- return -EINTR;
-
- /* Just try to read the requested blocks */
- while (amount_left > 0) {
- /*
- * Figure out how much we need to read:
- * Try to read the remaining amount, but not more than
- * the buffer size.
- * And don't try to read past the end of the file.
- */
- amount = min(amount_left, FSG_BUFLEN);
- amount = min((loff_t)amount,
- curlun->file_length - file_offset);
- if (amount == 0) {
- curlun->sense_data =
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
-
- /* Perform the read */
- file_offset_tmp = file_offset;
- nread = vfs_read(curlun->filp,
- (char __user *) bh->buf,
- amount, &file_offset_tmp);
- VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
- (unsigned long long) file_offset,
- (int) nread);
- if (signal_pending(current))
- return -EINTR;
-
- if (nread < 0) {
- LDBG(curlun, "error in file verify: %d\n", (int)nread);
- nread = 0;
- } else if (nread < amount) {
- LDBG(curlun, "partial file verify: %d/%u\n",
- (int)nread, amount);
- nread = round_down(nread, curlun->blksize);
- }
- if (nread == 0) {
- curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
- curlun->sense_data_info =
- file_offset >> curlun->blkbits;
- curlun->info_valid = 1;
- break;
- }
- file_offset += nread;
- amount_left -= nread;
- }
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u8 *buf = (u8 *) bh->buf;
-
- if (!curlun) { /* Unsupported LUNs are okay */
- common->bad_lun_okay = 1;
- memset(buf, 0, 36);
- buf[0] = 0x7f; /* Unsupported, no device-type */
- buf[4] = 31; /* Additional length */
- return 36;
- }
-
- buf[0] = curlun->cdrom ? TYPE_ROM : TYPE_DISK;
- buf[1] = curlun->removable ? 0x80 : 0;
- buf[2] = 2; /* ANSI SCSI level 2 */
- buf[3] = 2; /* SCSI-2 INQUIRY data format */
- buf[4] = 31; /* Additional length */
- buf[5] = 0; /* No special options */
- buf[6] = 0;
- buf[7] = 0;
- memcpy(buf + 8, common->inquiry_string, sizeof common->inquiry_string);
- return 36;
-}
-
-static int do_request_sense(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u8 *buf = (u8 *) bh->buf;
- u32 sd, sdinfo;
- int valid;
-
- /*
- * From the SCSI-2 spec., section 7.9 (Unit attention condition):
- *
- * If a REQUEST SENSE command is received from an initiator
- * with a pending unit attention condition (before the target
- * generates the contingent allegiance condition), then the
- * target shall either:
- * a) report any pending sense data and preserve the unit
- * attention condition on the logical unit, or,
- * b) report the unit attention condition, may discard any
- * pending sense data, and clear the unit attention
- * condition on the logical unit for that initiator.
- *
- * FSG normally uses option a); enable this code to use option b).
- */
-#if 0
- if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
- curlun->sense_data = curlun->unit_attention_data;
- curlun->unit_attention_data = SS_NO_SENSE;
- }
-#endif
-
- if (!curlun) { /* Unsupported LUNs are okay */
- common->bad_lun_okay = 1;
- sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
- sdinfo = 0;
- valid = 0;
- } else {
- sd = curlun->sense_data;
- sdinfo = curlun->sense_data_info;
- valid = curlun->info_valid << 7;
- curlun->sense_data = SS_NO_SENSE;
- curlun->sense_data_info = 0;
- curlun->info_valid = 0;
- }
-
- memset(buf, 0, 18);
- buf[0] = valid | 0x70; /* Valid, current error */
- buf[2] = SK(sd);
- put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */
- buf[7] = 18 - 8; /* Additional sense length */
- buf[12] = ASC(sd);
- buf[13] = ASCQ(sd);
- return 18;
-}
-
-static int do_read_capacity(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u32 lba = get_unaligned_be32(&common->cmnd[2]);
- int pmi = common->cmnd[8];
- u8 *buf = (u8 *)bh->buf;
-
- /* Check the PMI and LBA fields */
- if (pmi > 1 || (pmi == 0 && lba != 0)) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- put_unaligned_be32(curlun->num_sectors - 1, &buf[0]);
- /* Max logical block */
- put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */
- return 8;
-}
-
-static int do_read_header(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- int msf = common->cmnd[1] & 0x02;
- u32 lba = get_unaligned_be32(&common->cmnd[2]);
- u8 *buf = (u8 *)bh->buf;
-
- if (common->cmnd[1] & ~0x02) { /* Mask away MSF */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- if (lba >= curlun->num_sectors) {
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
- return -EINVAL;
- }
-
- memset(buf, 0, 8);
- buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */
- store_cdrom_address(&buf[4], msf, lba);
- return 8;
-}
-
-static int do_read_toc(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- int msf = common->cmnd[1] & 0x02;
- int start_track = common->cmnd[6];
- u8 *buf = (u8 *)bh->buf;
-
- if ((common->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
- start_track > 1) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- memset(buf, 0, 20);
- buf[1] = (20-2); /* TOC data length */
- buf[2] = 1; /* First track number */
- buf[3] = 1; /* Last track number */
- buf[5] = 0x16; /* Data track, copying allowed */
- buf[6] = 0x01; /* Only track is number 1 */
- store_cdrom_address(&buf[8], msf, 0);
-
- buf[13] = 0x16; /* Lead-out track is data */
- buf[14] = 0xAA; /* Lead-out track number */
- store_cdrom_address(&buf[16], msf, curlun->num_sectors);
- return 20;
-}
-
-static int do_mode_sense(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- int mscmnd = common->cmnd[0];
- u8 *buf = (u8 *) bh->buf;
- u8 *buf0 = buf;
- int pc, page_code;
- int changeable_values, all_pages;
- int valid_page = 0;
- int len, limit;
-
- if ((common->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- pc = common->cmnd[2] >> 6;
- page_code = common->cmnd[2] & 0x3f;
- if (pc == 3) {
- curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
- return -EINVAL;
- }
- changeable_values = (pc == 1);
- all_pages = (page_code == 0x3f);
-
- /*
- * Write the mode parameter header. Fixed values are: default
- * medium type, no cache control (DPOFUA), and no block descriptors.
- * The only variable value is the WriteProtect bit. We will fill in
- * the mode data length later.
- */
- memset(buf, 0, 8);
- if (mscmnd == MODE_SENSE) {
- buf[2] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
- buf += 4;
- limit = 255;
- } else { /* MODE_SENSE_10 */
- buf[3] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
- buf += 8;
- limit = 65535; /* Should really be FSG_BUFLEN */
- }
-
- /* No block descriptors */
-
- /*
- * The mode pages, in numerical order. The only page we support
- * is the Caching page.
- */
- if (page_code == 0x08 || all_pages) {
- valid_page = 1;
- buf[0] = 0x08; /* Page code */
- buf[1] = 10; /* Page length */
- memset(buf+2, 0, 10); /* None of the fields are changeable */
-
- if (!changeable_values) {
- buf[2] = 0x04; /* Write cache enable, */
- /* Read cache not disabled */
- /* No cache retention priorities */
- put_unaligned_be16(0xffff, &buf[4]);
- /* Don't disable prefetch */
- /* Minimum prefetch = 0 */
- put_unaligned_be16(0xffff, &buf[8]);
- /* Maximum prefetch */
- put_unaligned_be16(0xffff, &buf[10]);
- /* Maximum prefetch ceiling */
- }
- buf += 12;
- }
-
- /*
- * Check that a valid page was requested and the mode data length
- * isn't too long.
- */
- len = buf - buf0;
- if (!valid_page || len > limit) {
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- /* Store the mode data length */
- if (mscmnd == MODE_SENSE)
- buf0[0] = len - 1;
- else
- put_unaligned_be16(len - 2, buf0);
- return len;
-}
-
-static int do_start_stop(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- int loej, start;
-
- if (!curlun) {
- return -EINVAL;
- } else if (!curlun->removable) {
- curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
- } else if ((common->cmnd[1] & ~0x01) != 0 || /* Mask away Immed */
- (common->cmnd[4] & ~0x03) != 0) { /* Mask LoEj, Start */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- loej = common->cmnd[4] & 0x02;
- start = common->cmnd[4] & 0x01;
-
- /*
- * Our emulation doesn't support mounting; the medium is
- * available for use as soon as it is loaded.
- */
- if (start) {
- if (!fsg_lun_is_open(curlun)) {
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
- return -EINVAL;
- }
- return 0;
- }
-
- /* Are we allowed to unload the media? */
- if (curlun->prevent_medium_removal) {
- LDBG(curlun, "unload attempt prevented\n");
- curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
- return -EINVAL;
- }
-
- if (!loej)
- return 0;
-
- /* Simulate an unload/eject */
- if (common->ops && common->ops->pre_eject) {
- int r = common->ops->pre_eject(common, curlun,
- curlun - common->luns);
- if (unlikely(r < 0))
- return r;
- else if (r)
- return 0;
- }
-
- up_read(&common->filesem);
- down_write(&common->filesem);
- fsg_lun_close(curlun);
- up_write(&common->filesem);
- down_read(&common->filesem);
-
- return common->ops && common->ops->post_eject
- ? min(0, common->ops->post_eject(common, curlun,
- curlun - common->luns))
- : 0;
-}
-
-static int do_prevent_allow(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- int prevent;
-
- if (!common->curlun) {
- return -EINVAL;
- } else if (!common->curlun->removable) {
- common->curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
- }
-
- prevent = common->cmnd[4] & 0x01;
- if ((common->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
-
- if (curlun->prevent_medium_removal && !prevent)
- fsg_lun_fsync_sub(curlun);
- curlun->prevent_medium_removal = prevent;
- return 0;
-}
-
-static int do_read_format_capacities(struct fsg_common *common,
- struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
- u8 *buf = (u8 *) bh->buf;
-
- buf[0] = buf[1] = buf[2] = 0;
- buf[3] = 8; /* Only the Current/Maximum Capacity Descriptor */
- buf += 4;
-
- put_unaligned_be32(curlun->num_sectors, &buf[0]);
- /* Number of blocks */
- put_unaligned_be32(curlun->blksize, &buf[4]);/* Block length */
- buf[4] = 0x02; /* Current capacity */
- return 12;
-}
-
-static int do_mode_select(struct fsg_common *common, struct fsg_buffhd *bh)
-{
- struct fsg_lun *curlun = common->curlun;
-
- /* We don't support MODE SELECT */
- if (curlun)
- curlun->sense_data = SS_INVALID_COMMAND;
- return -EINVAL;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int halt_bulk_in_endpoint(struct fsg_dev *fsg)
-{
- int rc;
-
- rc = fsg_set_halt(fsg, fsg->bulk_in);
- if (rc == -EAGAIN)
- VDBG(fsg, "delayed bulk-in endpoint halt\n");
- while (rc != 0) {
- if (rc != -EAGAIN) {
- WARNING(fsg, "usb_ep_set_halt -> %d\n", rc);
- rc = 0;
- break;
- }
-
- /* Wait for a short time and then try again */
- if (msleep_interruptible(100) != 0)
- return -EINTR;
- rc = usb_ep_set_halt(fsg->bulk_in);
- }
- return rc;
-}
-
-static int wedge_bulk_in_endpoint(struct fsg_dev *fsg)
-{
- int rc;
-
- DBG(fsg, "bulk-in set wedge\n");
- rc = usb_ep_set_wedge(fsg->bulk_in);
- if (rc == -EAGAIN)
- VDBG(fsg, "delayed bulk-in endpoint wedge\n");
- while (rc != 0) {
- if (rc != -EAGAIN) {
- WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc);
- rc = 0;
- break;
- }
-
- /* Wait for a short time and then try again */
- if (msleep_interruptible(100) != 0)
- return -EINTR;
- rc = usb_ep_set_wedge(fsg->bulk_in);
- }
- return rc;
-}
-
-static int throw_away_data(struct fsg_common *common)
-{
- struct fsg_buffhd *bh;
- u32 amount;
- int rc;
-
- for (bh = common->next_buffhd_to_drain;
- bh->state != BUF_STATE_EMPTY || common->usb_amount_left > 0;
- bh = common->next_buffhd_to_drain) {
-
- /* Throw away the data in a filled buffer */
- if (bh->state == BUF_STATE_FULL) {
- smp_rmb();
- bh->state = BUF_STATE_EMPTY;
- common->next_buffhd_to_drain = bh->next;
-
- /* A short packet or an error ends everything */
- if (bh->outreq->actual < bh->bulk_out_intended_length ||
- bh->outreq->status != 0) {
- raise_exception(common,
- FSG_STATE_ABORT_BULK_OUT);
- return -EINTR;
- }
- continue;
- }
-
- /* Try to submit another request if we need one */
- bh = common->next_buffhd_to_fill;
- if (bh->state == BUF_STATE_EMPTY
- && common->usb_amount_left > 0) {
- amount = min(common->usb_amount_left, FSG_BUFLEN);
-
- /*
- * Except at the end of the transfer, amount will be
- * equal to the buffer size, which is divisible by
- * the bulk-out maxpacket size.
- */
- set_bulk_out_req_length(common, bh, amount);
- if (!start_out_transfer(common, bh))
- /* Dunno what to do if common->fsg is NULL */
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
- common->usb_amount_left -= amount;
- continue;
- }
-
- /* Otherwise wait for something to happen */
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
- return 0;
-}
-
-static int finish_reply(struct fsg_common *common)
-{
- struct fsg_buffhd *bh = common->next_buffhd_to_fill;
- int rc = 0;
-
- switch (common->data_dir) {
- case DATA_DIR_NONE:
- break; /* Nothing to send */
-
- /*
- * If we don't know whether the host wants to read or write,
- * this must be CB or CBI with an unknown command. We mustn't
- * try to send or receive any data. So stall both bulk pipes
- * if we can and wait for a reset.
- */
- case DATA_DIR_UNKNOWN:
- if (!common->can_stall) {
- /* Nothing */
- } else if (fsg_is_set(common)) {
- fsg_set_halt(common->fsg, common->fsg->bulk_out);
- rc = halt_bulk_in_endpoint(common->fsg);
- } else {
- /* Don't know what to do if common->fsg is NULL */
- rc = -EIO;
- }
- break;
-
- /* All but the last buffer of data must have already been sent */
- case DATA_DIR_TO_HOST:
- if (common->data_size == 0) {
- /* Nothing to send */
-
- /* Don't know what to do if common->fsg is NULL */
- } else if (!fsg_is_set(common)) {
- rc = -EIO;
-
- /* If there's no residue, simply send the last buffer */
- } else if (common->residue == 0) {
- bh->inreq->zero = 0;
- if (!start_in_transfer(common, bh))
- return -EIO;
- common->next_buffhd_to_fill = bh->next;
-
- /*
- * For Bulk-only, mark the end of the data with a short
- * packet. If we are allowed to stall, halt the bulk-in
- * endpoint. (Note: This violates the Bulk-Only Transport
- * specification, which requires us to pad the data if we
- * don't halt the endpoint. Presumably nobody will mind.)
- */
- } else {
- bh->inreq->zero = 1;
- if (!start_in_transfer(common, bh))
- rc = -EIO;
- common->next_buffhd_to_fill = bh->next;
- if (common->can_stall)
- rc = halt_bulk_in_endpoint(common->fsg);
- }
- break;
-
- /*
- * We have processed all we want from the data the host has sent.
- * There may still be outstanding bulk-out requests.
- */
- case DATA_DIR_FROM_HOST:
- if (common->residue == 0) {
- /* Nothing to receive */
-
- /* Did the host stop sending unexpectedly early? */
- } else if (common->short_packet_received) {
- raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
- rc = -EINTR;
-
- /*
- * We haven't processed all the incoming data. Even though
- * we may be allowed to stall, doing so would cause a race.
- * The controller may already have ACK'ed all the remaining
- * bulk-out packets, in which case the host wouldn't see a
- * STALL. Not realizing the endpoint was halted, it wouldn't
- * clear the halt -- leading to problems later on.
- */
-#if 0
- } else if (common->can_stall) {
- if (fsg_is_set(common))
- fsg_set_halt(common->fsg,
- common->fsg->bulk_out);
- raise_exception(common, FSG_STATE_ABORT_BULK_OUT);
- rc = -EINTR;
-#endif
-
- /*
- * We can't stall. Read in the excess data and throw it
- * all away.
- */
- } else {
- rc = throw_away_data(common);
- }
- break;
- }
- return rc;
-}
-
-static int send_status(struct fsg_common *common)
-{
- struct fsg_lun *curlun = common->curlun;
- struct fsg_buffhd *bh;
- struct bulk_cs_wrap *csw;
- int rc;
- u8 status = US_BULK_STAT_OK;
- u32 sd, sdinfo = 0;
-
- /* Wait for the next buffer to become available */
- bh = common->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
-
- if (curlun) {
- sd = curlun->sense_data;
- sdinfo = curlun->sense_data_info;
- } else if (common->bad_lun_okay)
- sd = SS_NO_SENSE;
- else
- sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
-
- if (common->phase_error) {
- DBG(common, "sending phase-error status\n");
- status = US_BULK_STAT_PHASE;
- sd = SS_INVALID_COMMAND;
- } else if (sd != SS_NO_SENSE) {
- DBG(common, "sending command-failure status\n");
- status = US_BULK_STAT_FAIL;
- VDBG(common, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
- " info x%x\n",
- SK(sd), ASC(sd), ASCQ(sd), sdinfo);
- }
-
- /* Store and send the Bulk-only CSW */
- csw = (void *)bh->buf;
-
- csw->Signature = cpu_to_le32(US_BULK_CS_SIGN);
- csw->Tag = common->tag;
- csw->Residue = cpu_to_le32(common->residue);
- csw->Status = status;
-
- bh->inreq->length = US_BULK_CS_WRAP_LEN;
- bh->inreq->zero = 0;
- if (!start_in_transfer(common, bh))
- /* Don't know what to do if common->fsg is NULL */
- return -EIO;
-
- common->next_buffhd_to_fill = bh->next;
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Check whether the command is properly formed and whether its data size
- * and direction agree with the values we already have.
- */
-static int check_command(struct fsg_common *common, int cmnd_size,
- enum data_direction data_dir, unsigned int mask,
- int needs_medium, const char *name)
-{
- int i;
- int lun = common->cmnd[1] >> 5;
- static const char dirletter[4] = {'u', 'o', 'i', 'n'};
- char hdlen[20];
- struct fsg_lun *curlun;
-
- hdlen[0] = 0;
- if (common->data_dir != DATA_DIR_UNKNOWN)
- sprintf(hdlen, ", H%c=%u", dirletter[(int) common->data_dir],
- common->data_size);
- VDBG(common, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
- name, cmnd_size, dirletter[(int) data_dir],
- common->data_size_from_cmnd, common->cmnd_size, hdlen);
-
- /*
- * We can't reply at all until we know the correct data direction
- * and size.
- */
- if (common->data_size_from_cmnd == 0)
- data_dir = DATA_DIR_NONE;
- if (common->data_size < common->data_size_from_cmnd) {
- /*
- * Host data size < Device data size is a phase error.
- * Carry out the command, but only transfer as much as
- * we are allowed.
- */
- common->data_size_from_cmnd = common->data_size;
- common->phase_error = 1;
- }
- common->residue = common->data_size;
- common->usb_amount_left = common->data_size;
-
- /* Conflicting data directions is a phase error */
- if (common->data_dir != data_dir && common->data_size_from_cmnd > 0) {
- common->phase_error = 1;
- return -EINVAL;
- }
-
- /* Verify the length of the command itself */
- if (cmnd_size != common->cmnd_size) {
-
- /*
- * Special case workaround: There are plenty of buggy SCSI
- * implementations. Many have issues with cbw->Length
- * field passing a wrong command size. For those cases we
- * always try to work around the problem by using the length
- * sent by the host side provided it is at least as large
- * as the correct command length.
- * Examples of such cases would be MS-Windows, which issues
- * REQUEST SENSE with cbw->Length == 12 where it should
- * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and
- * REQUEST SENSE with cbw->Length == 10 where it should
- * be 6 as well.
- */
- if (cmnd_size <= common->cmnd_size) {
- DBG(common, "%s is buggy! Expected length %d "
- "but we got %d\n", name,
- cmnd_size, common->cmnd_size);
- cmnd_size = common->cmnd_size;
- } else {
- common->phase_error = 1;
- return -EINVAL;
- }
- }
-
- /* Check that the LUN values are consistent */
- if (common->lun != lun)
- DBG(common, "using LUN %d from CBW, not LUN %d from CDB\n",
- common->lun, lun);
-
- /* Check the LUN */
- curlun = common->curlun;
- if (curlun) {
- if (common->cmnd[0] != REQUEST_SENSE) {
- curlun->sense_data = SS_NO_SENSE;
- curlun->sense_data_info = 0;
- curlun->info_valid = 0;
- }
- } else {
- common->bad_lun_okay = 0;
-
- /*
- * INQUIRY and REQUEST SENSE commands are explicitly allowed
- * to use unsupported LUNs; all others may not.
- */
- if (common->cmnd[0] != INQUIRY &&
- common->cmnd[0] != REQUEST_SENSE) {
- DBG(common, "unsupported LUN %d\n", common->lun);
- return -EINVAL;
- }
- }
-
- /*
- * If a unit attention condition exists, only INQUIRY and
- * REQUEST SENSE commands are allowed; anything else must fail.
- */
- if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
- common->cmnd[0] != INQUIRY &&
- common->cmnd[0] != REQUEST_SENSE) {
- curlun->sense_data = curlun->unit_attention_data;
- curlun->unit_attention_data = SS_NO_SENSE;
- return -EINVAL;
- }
-
- /* Check that only command bytes listed in the mask are non-zero */
- common->cmnd[1] &= 0x1f; /* Mask away the LUN */
- for (i = 1; i < cmnd_size; ++i) {
- if (common->cmnd[i] && !(mask & (1 << i))) {
- if (curlun)
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
- return -EINVAL;
- }
- }
-
- /* If the medium isn't mounted and the command needs to access
- * it, return an error. */
- if (curlun && !fsg_lun_is_open(curlun) && needs_medium) {
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
- return -EINVAL;
- }
-
- return 0;
-}
-
-/* wrapper of check_command for data size in blocks handling */
-static int check_command_size_in_blocks(struct fsg_common *common,
- int cmnd_size, enum data_direction data_dir,
- unsigned int mask, int needs_medium, const char *name)
-{
- if (common->curlun)
- common->data_size_from_cmnd <<= common->curlun->blkbits;
- return check_command(common, cmnd_size, data_dir,
- mask, needs_medium, name);
-}
-
-static int do_scsi_command(struct fsg_common *common)
-{
- struct fsg_buffhd *bh;
- int rc;
- int reply = -EINVAL;
- int i;
- static char unknown[16];
-
- dump_cdb(common);
-
- /* Wait for the next buffer to become available for data or status */
- bh = common->next_buffhd_to_fill;
- common->next_buffhd_to_drain = bh;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
- common->phase_error = 0;
- common->short_packet_received = 0;
-
- down_read(&common->filesem); /* We're using the backing file */
- switch (common->cmnd[0]) {
-
- case INQUIRY:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_TO_HOST,
- (1<<4), 0,
- "INQUIRY");
- if (reply == 0)
- reply = do_inquiry(common, bh);
- break;
-
- case MODE_SELECT:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_FROM_HOST,
- (1<<1) | (1<<4), 0,
- "MODE SELECT(6)");
- if (reply == 0)
- reply = do_mode_select(common, bh);
- break;
-
- case MODE_SELECT_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_FROM_HOST,
- (1<<1) | (3<<7), 0,
- "MODE SELECT(10)");
- if (reply == 0)
- reply = do_mode_select(common, bh);
- break;
-
- case MODE_SENSE:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_TO_HOST,
- (1<<1) | (1<<2) | (1<<4), 0,
- "MODE SENSE(6)");
- if (reply == 0)
- reply = do_mode_sense(common, bh);
- break;
-
- case MODE_SENSE_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (1<<1) | (1<<2) | (3<<7), 0,
- "MODE SENSE(10)");
- if (reply == 0)
- reply = do_mode_sense(common, bh);
- break;
-
- case ALLOW_MEDIUM_REMOVAL:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 6, DATA_DIR_NONE,
- (1<<4), 0,
- "PREVENT-ALLOW MEDIUM REMOVAL");
- if (reply == 0)
- reply = do_prevent_allow(common);
- break;
-
- case READ_6:
- i = common->cmnd[4];
- common->data_size_from_cmnd = (i == 0) ? 256 : i;
- reply = check_command_size_in_blocks(common, 6,
- DATA_DIR_TO_HOST,
- (7<<1) | (1<<4), 1,
- "READ(6)");
- if (reply == 0)
- reply = do_read(common);
- break;
-
- case READ_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command_size_in_blocks(common, 10,
- DATA_DIR_TO_HOST,
- (1<<1) | (0xf<<2) | (3<<7), 1,
- "READ(10)");
- if (reply == 0)
- reply = do_read(common);
- break;
-
- case READ_12:
- common->data_size_from_cmnd =
- get_unaligned_be32(&common->cmnd[6]);
- reply = check_command_size_in_blocks(common, 12,
- DATA_DIR_TO_HOST,
- (1<<1) | (0xf<<2) | (0xf<<6), 1,
- "READ(12)");
- if (reply == 0)
- reply = do_read(common);
- break;
-
- case READ_CAPACITY:
- common->data_size_from_cmnd = 8;
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (0xf<<2) | (1<<8), 1,
- "READ CAPACITY");
- if (reply == 0)
- reply = do_read_capacity(common, bh);
- break;
-
- case READ_HEADER:
- if (!common->curlun || !common->curlun->cdrom)
- goto unknown_cmnd;
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (3<<7) | (0x1f<<1), 1,
- "READ HEADER");
- if (reply == 0)
- reply = do_read_header(common, bh);
- break;
-
- case READ_TOC:
- if (!common->curlun || !common->curlun->cdrom)
- goto unknown_cmnd;
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (7<<6) | (1<<1), 1,
- "READ TOC");
- if (reply == 0)
- reply = do_read_toc(common, bh);
- break;
-
- case READ_FORMAT_CAPACITIES:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command(common, 10, DATA_DIR_TO_HOST,
- (3<<7), 1,
- "READ FORMAT CAPACITIES");
- if (reply == 0)
- reply = do_read_format_capacities(common, bh);
- break;
-
- case REQUEST_SENSE:
- common->data_size_from_cmnd = common->cmnd[4];
- reply = check_command(common, 6, DATA_DIR_TO_HOST,
- (1<<4), 0,
- "REQUEST SENSE");
- if (reply == 0)
- reply = do_request_sense(common, bh);
- break;
-
- case START_STOP:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 6, DATA_DIR_NONE,
- (1<<1) | (1<<4), 0,
- "START-STOP UNIT");
- if (reply == 0)
- reply = do_start_stop(common);
- break;
-
- case SYNCHRONIZE_CACHE:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 10, DATA_DIR_NONE,
- (0xf<<2) | (3<<7), 1,
- "SYNCHRONIZE CACHE");
- if (reply == 0)
- reply = do_synchronize_cache(common);
- break;
-
- case TEST_UNIT_READY:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 6, DATA_DIR_NONE,
- 0, 1,
- "TEST UNIT READY");
- break;
-
- /*
- * Although optional, this command is used by MS-Windows. We
- * support a minimal version: BytChk must be 0.
- */
- case VERIFY:
- common->data_size_from_cmnd = 0;
- reply = check_command(common, 10, DATA_DIR_NONE,
- (1<<1) | (0xf<<2) | (3<<7), 1,
- "VERIFY");
- if (reply == 0)
- reply = do_verify(common);
- break;
-
- case WRITE_6:
- i = common->cmnd[4];
- common->data_size_from_cmnd = (i == 0) ? 256 : i;
- reply = check_command_size_in_blocks(common, 6,
- DATA_DIR_FROM_HOST,
- (7<<1) | (1<<4), 1,
- "WRITE(6)");
- if (reply == 0)
- reply = do_write(common);
- break;
-
- case WRITE_10:
- common->data_size_from_cmnd =
- get_unaligned_be16(&common->cmnd[7]);
- reply = check_command_size_in_blocks(common, 10,
- DATA_DIR_FROM_HOST,
- (1<<1) | (0xf<<2) | (3<<7), 1,
- "WRITE(10)");
- if (reply == 0)
- reply = do_write(common);
- break;
-
- case WRITE_12:
- common->data_size_from_cmnd =
- get_unaligned_be32(&common->cmnd[6]);
- reply = check_command_size_in_blocks(common, 12,
- DATA_DIR_FROM_HOST,
- (1<<1) | (0xf<<2) | (0xf<<6), 1,
- "WRITE(12)");
- if (reply == 0)
- reply = do_write(common);
- break;
-
- /*
- * Some mandatory commands that we recognize but don't implement.
- * They don't mean much in this setting. It's left as an exercise
- * for anyone interested to implement RESERVE and RELEASE in terms
- * of Posix locks.
- */
- case FORMAT_UNIT:
- case RELEASE:
- case RESERVE:
- case SEND_DIAGNOSTIC:
- /* Fall through */
-
- default:
-unknown_cmnd:
- common->data_size_from_cmnd = 0;
- sprintf(unknown, "Unknown x%02x", common->cmnd[0]);
- reply = check_command(common, common->cmnd_size,
- DATA_DIR_UNKNOWN, ~0, 0, unknown);
- if (reply == 0) {
- common->curlun->sense_data = SS_INVALID_COMMAND;
- reply = -EINVAL;
- }
- break;
- }
- up_read(&common->filesem);
-
- if (reply == -EINTR || signal_pending(current))
- return -EINTR;
-
- /* Set up the single reply buffer for finish_reply() */
- if (reply == -EINVAL)
- reply = 0; /* Error reply length */
- if (reply >= 0 && common->data_dir == DATA_DIR_TO_HOST) {
- reply = min((u32)reply, common->data_size_from_cmnd);
- bh->inreq->length = reply;
- bh->state = BUF_STATE_FULL;
- common->residue -= reply;
- } /* Otherwise it's already set */
-
- return 0;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-{
- struct usb_request *req = bh->outreq;
- struct bulk_cb_wrap *cbw = req->buf;
- struct fsg_common *common = fsg->common;
-
- /* Was this a real packet? Should it be ignored? */
- if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
- return -EINVAL;
-
- /* Is the CBW valid? */
- if (req->actual != US_BULK_CB_WRAP_LEN ||
- cbw->Signature != cpu_to_le32(
- US_BULK_CB_SIGN)) {
- DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
- req->actual,
- le32_to_cpu(cbw->Signature));
-
- /*
- * The Bulk-only spec says we MUST stall the IN endpoint
- * (6.6.1), so it's unavoidable. It also says we must
- * retain this state until the next reset, but there's
- * no way to tell the controller driver it should ignore
- * Clear-Feature(HALT) requests.
- *
- * We aren't required to halt the OUT endpoint; instead
- * we can simply accept and discard any data received
- * until the next reset.
- */
- wedge_bulk_in_endpoint(fsg);
- set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
- return -EINVAL;
- }
-
- /* Is the CBW meaningful? */
- if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN ||
- cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) {
- DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
- "cmdlen %u\n",
- cbw->Lun, cbw->Flags, cbw->Length);
-
- /*
- * We can do anything we want here, so let's stall the
- * bulk pipes if we are allowed to.
- */
- if (common->can_stall) {
- fsg_set_halt(fsg, fsg->bulk_out);
- halt_bulk_in_endpoint(fsg);
- }
- return -EINVAL;
- }
-
- /* Save the command for later */
- common->cmnd_size = cbw->Length;
- memcpy(common->cmnd, cbw->CDB, common->cmnd_size);
- if (cbw->Flags & US_BULK_FLAG_IN)
- common->data_dir = DATA_DIR_TO_HOST;
- else
- common->data_dir = DATA_DIR_FROM_HOST;
- common->data_size = le32_to_cpu(cbw->DataTransferLength);
- if (common->data_size == 0)
- common->data_dir = DATA_DIR_NONE;
- common->lun = cbw->Lun;
- if (common->lun >= 0 && common->lun < common->nluns)
- common->curlun = &common->luns[common->lun];
- else
- common->curlun = NULL;
- common->tag = cbw->Tag;
- return 0;
-}
-
-static int get_next_command(struct fsg_common *common)
-{
- struct fsg_buffhd *bh;
- int rc = 0;
-
- /* Wait for the next buffer to become available */
- bh = common->next_buffhd_to_fill;
- while (bh->state != BUF_STATE_EMPTY) {
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
-
- /* Queue a request to read a Bulk-only CBW */
- set_bulk_out_req_length(common, bh, US_BULK_CB_WRAP_LEN);
- if (!start_out_transfer(common, bh))
- /* Don't know what to do if common->fsg is NULL */
- return -EIO;
-
- /*
- * We will drain the buffer in software, which means we
- * can reuse it for the next filling. No need to advance
- * next_buffhd_to_fill.
- */
-
- /* Wait for the CBW to arrive */
- while (bh->state != BUF_STATE_FULL) {
- rc = sleep_thread(common);
- if (rc)
- return rc;
- }
- smp_rmb();
- rc = fsg_is_set(common) ? received_cbw(common->fsg, bh) : -EIO;
- bh->state = BUF_STATE_EMPTY;
-
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int alloc_request(struct fsg_common *common, struct usb_ep *ep,
- struct usb_request **preq)
-{
- *preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
- if (*preq)
- return 0;
- ERROR(common, "can't allocate request for %s\n", ep->name);
- return -ENOMEM;
-}
-
-/* Reset interface setting and re-init endpoint state (toggle etc). */
-static int do_set_interface(struct fsg_common *common, struct fsg_dev *new_fsg)
-{
- struct fsg_dev *fsg;
- int i, rc = 0;
-
- if (common->running)
- DBG(common, "reset interface\n");
-
-reset:
- /* Deallocate the requests */
- if (common->fsg) {
- fsg = common->fsg;
-
- for (i = 0; i < fsg_num_buffers; ++i) {
- struct fsg_buffhd *bh = &common->buffhds[i];
-
- if (bh->inreq) {
- usb_ep_free_request(fsg->bulk_in, bh->inreq);
- bh->inreq = NULL;
- }
- if (bh->outreq) {
- usb_ep_free_request(fsg->bulk_out, bh->outreq);
- bh->outreq = NULL;
- }
- }
-
- /* Disable the endpoints */
- if (fsg->bulk_in_enabled) {
- usb_ep_disable(fsg->bulk_in);
- fsg->bulk_in_enabled = 0;
- }
- if (fsg->bulk_out_enabled) {
- usb_ep_disable(fsg->bulk_out);
- fsg->bulk_out_enabled = 0;
- }
-
- common->fsg = NULL;
- wake_up(&common->fsg_wait);
- }
-
- common->running = 0;
- if (!new_fsg || rc)
- return rc;
-
- common->fsg = new_fsg;
- fsg = common->fsg;
-
- /* Enable the endpoints */
- rc = config_ep_by_speed(common->gadget, &(fsg->function), fsg->bulk_in);
- if (rc)
- goto reset;
- rc = usb_ep_enable(fsg->bulk_in);
- if (rc)
- goto reset;
- fsg->bulk_in->driver_data = common;
- fsg->bulk_in_enabled = 1;
-
- rc = config_ep_by_speed(common->gadget, &(fsg->function),
- fsg->bulk_out);
- if (rc)
- goto reset;
- rc = usb_ep_enable(fsg->bulk_out);
- if (rc)
- goto reset;
- fsg->bulk_out->driver_data = common;
- fsg->bulk_out_enabled = 1;
- common->bulk_out_maxpacket = usb_endpoint_maxp(fsg->bulk_out->desc);
- clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
-
- /* Allocate the requests */
- for (i = 0; i < fsg_num_buffers; ++i) {
- struct fsg_buffhd *bh = &common->buffhds[i];
-
- rc = alloc_request(common, fsg->bulk_in, &bh->inreq);
- if (rc)
- goto reset;
- rc = alloc_request(common, fsg->bulk_out, &bh->outreq);
- if (rc)
- goto reset;
- bh->inreq->buf = bh->outreq->buf = bh->buf;
- bh->inreq->context = bh->outreq->context = bh;
- bh->inreq->complete = bulk_in_complete;
- bh->outreq->complete = bulk_out_complete;
- }
-
- common->running = 1;
- for (i = 0; i < common->nluns; ++i)
- common->luns[i].unit_attention_data = SS_RESET_OCCURRED;
- return rc;
-}
-
-
-/****************************** ALT CONFIGS ******************************/
-
-static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- fsg->common->new_fsg = fsg;
- raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
- return USB_GADGET_DELAYED_STATUS;
-}
-
-static void fsg_disable(struct usb_function *f)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- fsg->common->new_fsg = NULL;
- raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static void handle_exception(struct fsg_common *common)
-{
- siginfo_t info;
- int i;
- struct fsg_buffhd *bh;
- enum fsg_state old_state;
- struct fsg_lun *curlun;
- unsigned int exception_req_tag;
-
- /*
- * Clear the existing signals. Anything but SIGUSR1 is converted
- * into a high-priority EXIT exception.
- */
- for (;;) {
- int sig =
- dequeue_signal_lock(current, ¤t->blocked, &info);
- if (!sig)
- break;
- if (sig != SIGUSR1) {
- if (common->state < FSG_STATE_EXIT)
- DBG(common, "Main thread exiting on signal\n");
- raise_exception(common, FSG_STATE_EXIT);
- }
- }
-
- /* Cancel all the pending transfers */
- if (likely(common->fsg)) {
- for (i = 0; i < fsg_num_buffers; ++i) {
- bh = &common->buffhds[i];
- if (bh->inreq_busy)
- usb_ep_dequeue(common->fsg->bulk_in, bh->inreq);
- if (bh->outreq_busy)
- usb_ep_dequeue(common->fsg->bulk_out,
- bh->outreq);
- }
-
- /* Wait until everything is idle */
- for (;;) {
- int num_active = 0;
- for (i = 0; i < fsg_num_buffers; ++i) {
- bh = &common->buffhds[i];
- num_active += bh->inreq_busy + bh->outreq_busy;
- }
- if (num_active == 0)
- break;
- if (sleep_thread(common))
- return;
- }
-
- /* Clear out the controller's fifos */
- if (common->fsg->bulk_in_enabled)
- usb_ep_fifo_flush(common->fsg->bulk_in);
- if (common->fsg->bulk_out_enabled)
- usb_ep_fifo_flush(common->fsg->bulk_out);
- }
-
- /*
- * Reset the I/O buffer states and pointers, the SCSI
- * state, and the exception. Then invoke the handler.
- */
- spin_lock_irq(&common->lock);
-
- for (i = 0; i < fsg_num_buffers; ++i) {
- bh = &common->buffhds[i];
- bh->state = BUF_STATE_EMPTY;
- }
- common->next_buffhd_to_fill = &common->buffhds[0];
- common->next_buffhd_to_drain = &common->buffhds[0];
- exception_req_tag = common->exception_req_tag;
- old_state = common->state;
-
- if (old_state == FSG_STATE_ABORT_BULK_OUT)
- common->state = FSG_STATE_STATUS_PHASE;
- else {
- for (i = 0; i < common->nluns; ++i) {
- curlun = &common->luns[i];
- curlun->prevent_medium_removal = 0;
- curlun->sense_data = SS_NO_SENSE;
- curlun->unit_attention_data = SS_NO_SENSE;
- curlun->sense_data_info = 0;
- curlun->info_valid = 0;
- }
- common->state = FSG_STATE_IDLE;
- }
- spin_unlock_irq(&common->lock);
-
- /* Carry out any extra actions required for the exception */
- switch (old_state) {
- case FSG_STATE_ABORT_BULK_OUT:
- send_status(common);
- spin_lock_irq(&common->lock);
- if (common->state == FSG_STATE_STATUS_PHASE)
- common->state = FSG_STATE_IDLE;
- spin_unlock_irq(&common->lock);
- break;
-
- case FSG_STATE_RESET:
- /*
- * In case we were forced against our will to halt a
- * bulk endpoint, clear the halt now. (The SuperH UDC
- * requires this.)
- */
- if (!fsg_is_set(common))
- break;
- if (test_and_clear_bit(IGNORE_BULK_OUT,
- &common->fsg->atomic_bitflags))
- usb_ep_clear_halt(common->fsg->bulk_in);
-
- if (common->ep0_req_tag == exception_req_tag)
- ep0_queue(common); /* Complete the status stage */
-
- /*
- * Technically this should go here, but it would only be
- * a waste of time. Ditto for the INTERFACE_CHANGE and
- * CONFIG_CHANGE cases.
- */
- /* for (i = 0; i < common->nluns; ++i) */
- /* common->luns[i].unit_attention_data = */
- /* SS_RESET_OCCURRED; */
- break;
-
- case FSG_STATE_CONFIG_CHANGE:
- do_set_interface(common, common->new_fsg);
- if (common->new_fsg)
- usb_composite_setup_continue(common->cdev);
- break;
-
- case FSG_STATE_EXIT:
- case FSG_STATE_TERMINATED:
- do_set_interface(common, NULL); /* Free resources */
- spin_lock_irq(&common->lock);
- common->state = FSG_STATE_TERMINATED; /* Stop the thread */
- spin_unlock_irq(&common->lock);
- break;
-
- case FSG_STATE_INTERFACE_CHANGE:
- case FSG_STATE_DISCONNECT:
- case FSG_STATE_COMMAND_PHASE:
- case FSG_STATE_DATA_PHASE:
- case FSG_STATE_STATUS_PHASE:
- case FSG_STATE_IDLE:
- break;
- }
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int fsg_main_thread(void *common_)
-{
- struct fsg_common *common = common_;
-
- /*
- * Allow the thread to be killed by a signal, but set the signal mask
- * to block everything but INT, TERM, KILL, and USR1.
- */
- allow_signal(SIGINT);
- allow_signal(SIGTERM);
- allow_signal(SIGKILL);
- allow_signal(SIGUSR1);
-
- /* Allow the thread to be frozen */
- set_freezable();
-
- /*
- * Arrange for userspace references to be interpreted as kernel
- * pointers. That way we can pass a kernel pointer to a routine
- * that expects a __user pointer and it will work okay.
- */
- set_fs(get_ds());
-
- /* The main loop */
- while (common->state != FSG_STATE_TERMINATED) {
- if (exception_in_progress(common) || signal_pending(current)) {
- handle_exception(common);
- continue;
- }
-
- if (!common->running) {
- sleep_thread(common);
- continue;
- }
-
- if (get_next_command(common))
- continue;
-
- spin_lock_irq(&common->lock);
- if (!exception_in_progress(common))
- common->state = FSG_STATE_DATA_PHASE;
- spin_unlock_irq(&common->lock);
-
- if (do_scsi_command(common) || finish_reply(common))
- continue;
-
- spin_lock_irq(&common->lock);
- if (!exception_in_progress(common))
- common->state = FSG_STATE_STATUS_PHASE;
- spin_unlock_irq(&common->lock);
-
- if (send_status(common))
- continue;
-
- spin_lock_irq(&common->lock);
- if (!exception_in_progress(common))
- common->state = FSG_STATE_IDLE;
- spin_unlock_irq(&common->lock);
- }
-
- spin_lock_irq(&common->lock);
- common->thread_task = NULL;
- spin_unlock_irq(&common->lock);
-
- if (!common->ops || !common->ops->thread_exits
- || common->ops->thread_exits(common) < 0) {
- struct fsg_lun *curlun = common->luns;
- unsigned i = common->nluns;
-
- down_write(&common->filesem);
- for (; i--; ++curlun) {
- if (!fsg_lun_is_open(curlun))
- continue;
-
- fsg_lun_close(curlun);
- curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
- }
- up_write(&common->filesem);
- }
-
- /* Let fsg_unbind() know the thread has exited */
- complete_and_exit(&common->thread_notifier, 0);
-}
-
-
-/*************************** DEVICE ATTRIBUTES ***************************/
-
-static DEVICE_ATTR(ro, 0644, fsg_show_ro, fsg_store_ro);
-static DEVICE_ATTR(nofua, 0644, fsg_show_nofua, fsg_store_nofua);
-static DEVICE_ATTR(file, 0644, fsg_show_file, fsg_store_file);
-
-static struct device_attribute dev_attr_ro_cdrom =
- __ATTR(ro, 0444, fsg_show_ro, NULL);
-static struct device_attribute dev_attr_file_nonremovable =
- __ATTR(file, 0444, fsg_show_file, NULL);
-
-
-/****************************** FSG COMMON ******************************/
-
-static void fsg_common_release(struct kref *ref);
-
-static void fsg_lun_release(struct device *dev)
-{
- /* Nothing needs to be done */
-}
-
-static inline void fsg_common_get(struct fsg_common *common)
-{
- kref_get(&common->ref);
-}
-
-static inline void fsg_common_put(struct fsg_common *common)
-{
- kref_put(&common->ref, fsg_common_release);
-}
-
-static struct fsg_common *fsg_common_init(struct fsg_common *common,
- struct usb_composite_dev *cdev,
- struct fsg_config *cfg)
-{
- struct usb_gadget *gadget = cdev->gadget;
- struct fsg_buffhd *bh;
- struct fsg_lun *curlun;
- struct fsg_lun_config *lcfg;
- int nluns, i, rc;
- char *pathbuf;
-
- rc = fsg_num_buffers_validate();
- if (rc != 0)
- return ERR_PTR(rc);
-
- /* Find out how many LUNs there should be */
- nluns = cfg->nluns;
- if (nluns < 1 || nluns > FSG_MAX_LUNS) {
- dev_err(&gadget->dev, "invalid number of LUNs: %u\n", nluns);
- return ERR_PTR(-EINVAL);
- }
-
- /* Allocate? */
- if (!common) {
- common = kzalloc(sizeof *common, GFP_KERNEL);
- if (!common)
- return ERR_PTR(-ENOMEM);
- common->free_storage_on_release = 1;
- } else {
- memset(common, 0, sizeof *common);
- common->free_storage_on_release = 0;
- }
-
- common->buffhds = kcalloc(fsg_num_buffers,
- sizeof *(common->buffhds), GFP_KERNEL);
- if (!common->buffhds) {
- if (common->free_storage_on_release)
- kfree(common);
- return ERR_PTR(-ENOMEM);
- }
-
- common->ops = cfg->ops;
- common->private_data = cfg->private_data;
-
- common->gadget = gadget;
- common->ep0 = gadget->ep0;
- common->ep0req = cdev->req;
- common->cdev = cdev;
-
- /* Maybe allocate device-global string IDs, and patch descriptors */
- if (fsg_strings[FSG_STRING_INTERFACE].id == 0) {
- rc = usb_string_id(cdev);
- if (unlikely(rc < 0))
- goto error_release;
- fsg_strings[FSG_STRING_INTERFACE].id = rc;
- fsg_intf_desc.iInterface = rc;
- }
-
- /*
- * Create the LUNs, open their backing files, and register the
- * LUN devices in sysfs.
- */
- curlun = kcalloc(nluns, sizeof(*curlun), GFP_KERNEL);
- if (unlikely(!curlun)) {
- rc = -ENOMEM;
- goto error_release;
- }
- common->luns = curlun;
-
- init_rwsem(&common->filesem);
-
- for (i = 0, lcfg = cfg->luns; i < nluns; ++i, ++curlun, ++lcfg) {
- curlun->cdrom = !!lcfg->cdrom;
- curlun->ro = lcfg->cdrom || lcfg->ro;
- curlun->initially_ro = curlun->ro;
- curlun->removable = lcfg->removable;
- curlun->dev.release = fsg_lun_release;
- curlun->dev.parent = &gadget->dev;
- /* curlun->dev.driver = &fsg_driver.driver; XXX */
- dev_set_drvdata(&curlun->dev, &common->filesem);
- dev_set_name(&curlun->dev, "lun%d", i);
-
- rc = device_register(&curlun->dev);
- if (rc) {
- INFO(common, "failed to register LUN%d: %d\n", i, rc);
- common->nluns = i;
- put_device(&curlun->dev);
- goto error_release;
- }
-
- rc = device_create_file(&curlun->dev,
- curlun->cdrom
- ? &dev_attr_ro_cdrom
- : &dev_attr_ro);
- if (rc)
- goto error_luns;
- rc = device_create_file(&curlun->dev,
- curlun->removable
- ? &dev_attr_file
- : &dev_attr_file_nonremovable);
- if (rc)
- goto error_luns;
- rc = device_create_file(&curlun->dev, &dev_attr_nofua);
- if (rc)
- goto error_luns;
-
- if (lcfg->filename) {
- rc = fsg_lun_open(curlun, lcfg->filename);
- if (rc)
- goto error_luns;
- } else if (!curlun->removable) {
- ERROR(common, "no file given for LUN%d\n", i);
- rc = -EINVAL;
- goto error_luns;
- }
- }
- common->nluns = nluns;
-
- /* Data buffers cyclic list */
- bh = common->buffhds;
- i = fsg_num_buffers;
- goto buffhds_first_it;
- do {
- bh->next = bh + 1;
- ++bh;
-buffhds_first_it:
- bh->buf = kmalloc(FSG_BUFLEN, GFP_KERNEL);
- if (unlikely(!bh->buf)) {
- rc = -ENOMEM;
- goto error_release;
- }
- } while (--i);
- bh->next = common->buffhds;
-
- /* Prepare inquiryString */
- if (cfg->release != 0xffff) {
- i = cfg->release;
- } else {
- i = usb_gadget_controller_number(gadget);
- if (i >= 0) {
- i = 0x0300 + i;
- } else {
- WARNING(common, "controller '%s' not recognized\n",
- gadget->name);
- i = 0x0399;
- }
- }
- snprintf(common->inquiry_string, sizeof common->inquiry_string,
- "%-8s%-16s%04x", cfg->vendor_name ?: "Linux",
- /* Assume product name dependent on the first LUN */
- cfg->product_name ?: (common->luns->cdrom
- ? "File-Stor Gadget"
- : "File-CD Gadget"),
- i);
-
- /*
- * Some peripheral controllers are known not to be able to
- * halt bulk endpoints correctly. If one of them is present,
- * disable stalls.
- */
- common->can_stall = cfg->can_stall &&
- !(gadget_is_at91(common->gadget));
-
- spin_lock_init(&common->lock);
- kref_init(&common->ref);
-
- /* Tell the thread to start working */
- common->thread_task =
- kthread_create(fsg_main_thread, common, "file-storage");
- if (IS_ERR(common->thread_task)) {
- rc = PTR_ERR(common->thread_task);
- goto error_release;
- }
- init_completion(&common->thread_notifier);
- init_waitqueue_head(&common->fsg_wait);
-
- /* Information */
- INFO(common, FSG_DRIVER_DESC ", version: " FSG_DRIVER_VERSION "\n");
- INFO(common, "Number of LUNs=%d\n", common->nluns);
-
- pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
- for (i = 0, nluns = common->nluns, curlun = common->luns;
- i < nluns;
- ++curlun, ++i) {
- char *p = "(no medium)";
- if (fsg_lun_is_open(curlun)) {
- p = "(error)";
- if (pathbuf) {
- p = d_path(&curlun->filp->f_path,
- pathbuf, PATH_MAX);
- if (IS_ERR(p))
- p = "(error)";
- }
- }
- LINFO(curlun, "LUN: %s%s%sfile: %s\n",
- curlun->removable ? "removable " : "",
- curlun->ro ? "read only " : "",
- curlun->cdrom ? "CD-ROM " : "",
- p);
- }
- kfree(pathbuf);
-
- DBG(common, "I/O thread pid: %d\n", task_pid_nr(common->thread_task));
-
- wake_up_process(common->thread_task);
-
- return common;
-
-error_luns:
- common->nluns = i + 1;
-error_release:
- common->state = FSG_STATE_TERMINATED; /* The thread is dead */
- /* Call fsg_common_release() directly, ref might be not initialised. */
- fsg_common_release(&common->ref);
- return ERR_PTR(rc);
-}
-
-static void fsg_common_release(struct kref *ref)
-{
- struct fsg_common *common = container_of(ref, struct fsg_common, ref);
-
- /* If the thread isn't already dead, tell it to exit now */
- if (common->state != FSG_STATE_TERMINATED) {
- raise_exception(common, FSG_STATE_EXIT);
- wait_for_completion(&common->thread_notifier);
- }
-
- if (likely(common->luns)) {
- struct fsg_lun *lun = common->luns;
- unsigned i = common->nluns;
-
- /* In error recovery common->nluns may be zero. */
- for (; i; --i, ++lun) {
- device_remove_file(&lun->dev, &dev_attr_nofua);
- device_remove_file(&lun->dev,
- lun->cdrom
- ? &dev_attr_ro_cdrom
- : &dev_attr_ro);
- device_remove_file(&lun->dev,
- lun->removable
- ? &dev_attr_file
- : &dev_attr_file_nonremovable);
- fsg_lun_close(lun);
- device_unregister(&lun->dev);
- }
-
- kfree(common->luns);
- }
-
- {
- struct fsg_buffhd *bh = common->buffhds;
- unsigned i = fsg_num_buffers;
- do {
- kfree(bh->buf);
- } while (++bh, --i);
- }
-
- kfree(common->buffhds);
- if (common->free_storage_on_release)
- kfree(common);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static void fsg_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- struct fsg_common *common = fsg->common;
-
- DBG(fsg, "unbind\n");
- if (fsg->common->fsg == fsg) {
- fsg->common->new_fsg = NULL;
- raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
- /* FIXME: make interruptible or killable somehow? */
- wait_event(common->fsg_wait, common->fsg != fsg);
- }
-
- fsg_common_put(common);
- usb_free_descriptors(fsg->function.descriptors);
- usb_free_descriptors(fsg->function.hs_descriptors);
- usb_free_descriptors(fsg->function.ss_descriptors);
- kfree(fsg);
-}
-
-static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct fsg_dev *fsg = fsg_from_func(f);
- struct usb_gadget *gadget = c->cdev->gadget;
- int i;
- struct usb_ep *ep;
-
- fsg->gadget = gadget;
-
- /* New interface */
- i = usb_interface_id(c, f);
- if (i < 0)
- return i;
- fsg_intf_desc.bInterfaceNumber = i;
- fsg->interface_number = i;
-
- /* Find all the endpoints we will use */
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
- if (!ep)
- goto autoconf_fail;
- ep->driver_data = fsg->common; /* claim the endpoint */
- fsg->bulk_in = ep;
-
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
- if (!ep)
- goto autoconf_fail;
- ep->driver_data = fsg->common; /* claim the endpoint */
- fsg->bulk_out = ep;
-
- /* Copy descriptors */
- f->descriptors = usb_copy_descriptors(fsg_fs_function);
- if (unlikely(!f->descriptors))
- return -ENOMEM;
-
- if (gadget_is_dualspeed(gadget)) {
- /* Assume endpoint addresses are the same for both speeds */
- fsg_hs_bulk_in_desc.bEndpointAddress =
- fsg_fs_bulk_in_desc.bEndpointAddress;
- fsg_hs_bulk_out_desc.bEndpointAddress =
- fsg_fs_bulk_out_desc.bEndpointAddress;
- f->hs_descriptors = usb_copy_descriptors(fsg_hs_function);
- if (unlikely(!f->hs_descriptors)) {
- usb_free_descriptors(f->descriptors);
- return -ENOMEM;
- }
- }
-
- if (gadget_is_superspeed(gadget)) {
- unsigned max_burst;
-
- /* Calculate bMaxBurst, we know packet size is 1024 */
- max_burst = min_t(unsigned, FSG_BUFLEN / 1024, 15);
-
- fsg_ss_bulk_in_desc.bEndpointAddress =
- fsg_fs_bulk_in_desc.bEndpointAddress;
- fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst;
-
- fsg_ss_bulk_out_desc.bEndpointAddress =
- fsg_fs_bulk_out_desc.bEndpointAddress;
- fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst;
-
- f->ss_descriptors = usb_copy_descriptors(fsg_ss_function);
- if (unlikely(!f->ss_descriptors)) {
- usb_free_descriptors(f->hs_descriptors);
- usb_free_descriptors(f->descriptors);
- return -ENOMEM;
- }
- }
-
- return 0;
-
-autoconf_fail:
- ERROR(fsg, "unable to autoconfigure all endpoints\n");
- return -ENOTSUPP;
-}
-
-
-/****************************** ADD FUNCTION ******************************/
-
-static struct usb_gadget_strings *fsg_strings_array[] = {
- &fsg_stringtab,
- NULL,
-};
-
-static int fsg_bind_config(struct usb_composite_dev *cdev,
- struct usb_configuration *c,
- struct fsg_common *common)
-{
- struct fsg_dev *fsg;
- int rc;
-
- fsg = kzalloc(sizeof *fsg, GFP_KERNEL);
- if (unlikely(!fsg))
- return -ENOMEM;
-
- fsg->function.name = FSG_DRIVER_DESC;
- fsg->function.strings = fsg_strings_array;
- fsg->function.bind = fsg_bind;
- fsg->function.unbind = fsg_unbind;
- fsg->function.setup = fsg_setup;
- fsg->function.set_alt = fsg_set_alt;
- fsg->function.disable = fsg_disable;
-
- fsg->common = common;
- /*
- * Our caller holds a reference to common structure so we
- * don't have to be worry about it being freed until we return
- * from this function. So instead of incrementing counter now
- * and decrement in error recovery we increment it only when
- * call to usb_add_function() was successful.
- */
-
- rc = usb_add_function(c, &fsg->function);
- if (unlikely(rc))
- kfree(fsg);
- else
- fsg_common_get(fsg->common);
- return rc;
-}
-
-
-/************************* Module parameters *************************/
-
-struct fsg_module_parameters {
- char *file[FSG_MAX_LUNS];
- bool ro[FSG_MAX_LUNS];
- bool removable[FSG_MAX_LUNS];
- bool cdrom[FSG_MAX_LUNS];
- bool nofua[FSG_MAX_LUNS];
-
- unsigned int file_count, ro_count, removable_count, cdrom_count;
- unsigned int nofua_count;
- unsigned int luns; /* nluns */
- bool stall; /* can_stall */
-};
-
-#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc) \
- module_param_array_named(prefix ## name, params.name, type, \
- &prefix ## params.name ## _count, \
- S_IRUGO); \
- MODULE_PARM_DESC(prefix ## name, desc)
-
-#define _FSG_MODULE_PARAM(prefix, params, name, type, desc) \
- module_param_named(prefix ## name, params.name, type, \
- S_IRUGO); \
- MODULE_PARM_DESC(prefix ## name, desc)
-
-#define FSG_MODULE_PARAMETERS(prefix, params) \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp, \
- "names of backing files or devices"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool, \
- "true to force read-only"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool, \
- "true to simulate removable media"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \
- "true to simulate CD-ROM instead of disk"); \
- _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \
- "true to ignore SCSI WRITE(10,12) FUA bit"); \
- _FSG_MODULE_PARAM(prefix, params, luns, uint, \
- "number of LUNs"); \
- _FSG_MODULE_PARAM(prefix, params, stall, bool, \
- "false to prevent bulk stalls")
-
-static void
-fsg_config_from_params(struct fsg_config *cfg,
- const struct fsg_module_parameters *params)
-{
- struct fsg_lun_config *lun;
- unsigned i;
-
- /* Configure LUNs */
- cfg->nluns =
- min(params->luns ?: (params->file_count ?: 1u),
- (unsigned)FSG_MAX_LUNS);
- for (i = 0, lun = cfg->luns; i < cfg->nluns; ++i, ++lun) {
- lun->ro = !!params->ro[i];
- lun->cdrom = !!params->cdrom[i];
- lun->removable = !!params->removable[i];
- lun->filename =
- params->file_count > i && params->file[i][0]
- ? params->file[i]
- : 0;
- }
-
- /* Let MSF use defaults */
- cfg->vendor_name = 0;
- cfg->product_name = 0;
- cfg->release = 0xffff;
-
- cfg->ops = NULL;
- cfg->private_data = NULL;
-
- /* Finalise */
- cfg->can_stall = params->stall;
-}
-
-static inline struct fsg_common *
-fsg_common_from_params(struct fsg_common *common,
- struct usb_composite_dev *cdev,
- const struct fsg_module_parameters *params)
- __attribute__((unused));
-static inline struct fsg_common *
-fsg_common_from_params(struct fsg_common *common,
- struct usb_composite_dev *cdev,
- const struct fsg_module_parameters *params)
-{
- struct fsg_config cfg;
- fsg_config_from_params(&cfg, params);
- return fsg_common_init(common, cdev, &cfg);
-}
+++ /dev/null
-/*
- * f_rndis.c -- RNDIS link function driver
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
- * Copyright (C) 2008 Nokia Corporation
- * Copyright (C) 2009 Samsung Electronics
- * Author: Michal Nazarewicz (mina86@mina86.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/etherdevice.h>
-
-#include <linux/atomic.h>
-
-#include "u_ether.h"
-#include "rndis.h"
-
-
-/*
- * This function is an RNDIS Ethernet port -- a Microsoft protocol that's
- * been promoted instead of the standard CDC Ethernet. The published RNDIS
- * spec is ambiguous, incomplete, and needlessly complex. Variants such as
- * ActiveSync have even worse status in terms of specification.
- *
- * In short: it's a protocol controlled by (and for) Microsoft, not for an
- * Open ecosystem or markets. Linux supports it *only* because Microsoft
- * doesn't support the CDC Ethernet standard.
- *
- * The RNDIS data transfer model is complex, with multiple Ethernet packets
- * per USB message, and out of band data. The control model is built around
- * what's essentially an "RNDIS RPC" protocol. It's all wrapped in a CDC ACM
- * (modem, not Ethernet) veneer, with those ACM descriptors being entirely
- * useless (they're ignored). RNDIS expects to be the only function in its
- * configuration, so it's no real help if you need composite devices; and
- * it expects to be the first configuration too.
- *
- * There is a single technical advantage of RNDIS over CDC Ethernet, if you
- * discount the fluff that its RPC can be made to deliver: it doesn't need
- * a NOP altsetting for the data interface. That lets it work on some of the
- * "so smart it's stupid" hardware which takes over configuration changes
- * from the software, and adds restrictions like "no altsettings".
- *
- * Unfortunately MSFT's RNDIS drivers are buggy. They hang or oops, and
- * have all sorts of contrary-to-specification oddities that can prevent
- * them from working sanely. Since bugfixes (or accurate specs, letting
- * Linux work around those bugs) are unlikely to ever come from MSFT, you
- * may want to avoid using RNDIS on purely operational grounds.
- *
- * Omissions from the RNDIS 1.0 specification include:
- *
- * - Power management ... references data that's scattered around lots
- * of other documentation, which is incorrect/incomplete there too.
- *
- * - There are various undocumented protocol requirements, like the need
- * to send garbage in some control-OUT messages.
- *
- * - MS-Windows drivers sometimes emit undocumented requests.
- */
-
-struct f_rndis {
- struct gether port;
- u8 ctrl_id, data_id;
- u8 ethaddr[ETH_ALEN];
- u32 vendorID;
- const char *manufacturer;
- int config;
-
- struct usb_ep *notify;
- struct usb_request *notify_req;
- atomic_t notify_count;
-};
-
-static inline struct f_rndis *func_to_rndis(struct usb_function *f)
-{
- return container_of(f, struct f_rndis, port.func);
-}
-
-/* peak (theoretical) bulk transfer rate in bits-per-second */
-static unsigned int bitrate(struct usb_gadget *g)
-{
- if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
- return 13 * 1024 * 8 * 1000 * 8;
- else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
- return 13 * 512 * 8 * 1000 * 8;
- else
- return 19 * 64 * 1 * 1000 * 8;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- */
-
-#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
-#define STATUS_BYTECOUNT 8 /* 8 bytes data */
-
-
-/* interface descriptor: */
-
-static struct usb_interface_descriptor rndis_control_intf = {
- .bLength = sizeof rndis_control_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- /* status endpoint is optional; this could be patched later */
- .bNumEndpoints = 1,
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
- .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
- /* .iInterface = DYNAMIC */
-};
-
-static struct usb_cdc_header_desc header_desc = {
- .bLength = sizeof header_desc,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_HEADER_TYPE,
-
- .bcdCDC = cpu_to_le16(0x0110),
-};
-
-static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
- .bLength = sizeof call_mgmt_descriptor,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
-
- .bmCapabilities = 0x00,
- .bDataInterface = 0x01,
-};
-
-static struct usb_cdc_acm_descriptor rndis_acm_descriptor = {
- .bLength = sizeof rndis_acm_descriptor,
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ACM_TYPE,
-
- .bmCapabilities = 0x00,
-};
-
-static struct usb_cdc_union_desc rndis_union_desc = {
- .bLength = sizeof(rndis_union_desc),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_UNION_TYPE,
- /* .bMasterInterface0 = DYNAMIC */
- /* .bSlaveInterface0 = DYNAMIC */
-};
-
-/* the data interface has two bulk endpoints */
-
-static struct usb_interface_descriptor rndis_data_intf = {
- .bLength = sizeof rndis_data_intf,
- .bDescriptorType = USB_DT_INTERFACE,
-
- /* .bInterfaceNumber = DYNAMIC */
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_CDC_DATA,
- .bInterfaceSubClass = 0,
- .bInterfaceProtocol = 0,
- /* .iInterface = DYNAMIC */
-};
-
-
-static struct usb_interface_assoc_descriptor
-rndis_iad_descriptor = {
- .bLength = sizeof rndis_iad_descriptor,
- .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
-
- .bFirstInterface = 0, /* XXX, hardcoded */
- .bInterfaceCount = 2, // control + data
- .bFunctionClass = USB_CLASS_COMM,
- .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
- .bFunctionProtocol = USB_CDC_PROTO_NONE,
- /* .iFunction = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
-};
-
-static struct usb_endpoint_descriptor fs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *eth_fs_function[] = {
- (struct usb_descriptor_header *) &rndis_iad_descriptor,
-
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &rndis_acm_descriptor,
- (struct usb_descriptor_header *) &rndis_union_desc,
- (struct usb_descriptor_header *) &fs_notify_desc,
-
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &fs_in_desc,
- (struct usb_descriptor_header *) &fs_out_desc,
- NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
-};
-
-static struct usb_endpoint_descriptor hs_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *eth_hs_function[] = {
- (struct usb_descriptor_header *) &rndis_iad_descriptor,
-
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &rndis_acm_descriptor,
- (struct usb_descriptor_header *) &rndis_union_desc,
- (struct usb_descriptor_header *) &hs_notify_desc,
-
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &hs_in_desc,
- (struct usb_descriptor_header *) &hs_out_desc,
- NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_notify_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
- .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
-};
-
-static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = {
- .bLength = sizeof ss_intr_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 3 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
- .wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT),
-};
-
-static struct usb_endpoint_descriptor ss_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor ss_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_bulk_comp_desc = {
- .bLength = sizeof ss_bulk_comp_desc,
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /* the following 2 values can be tweaked if necessary */
- /* .bMaxBurst = 0, */
- /* .bmAttributes = 0, */
-};
-
-static struct usb_descriptor_header *eth_ss_function[] = {
- (struct usb_descriptor_header *) &rndis_iad_descriptor,
-
- /* control interface matches ACM, not Ethernet */
- (struct usb_descriptor_header *) &rndis_control_intf,
- (struct usb_descriptor_header *) &header_desc,
- (struct usb_descriptor_header *) &call_mgmt_descriptor,
- (struct usb_descriptor_header *) &rndis_acm_descriptor,
- (struct usb_descriptor_header *) &rndis_union_desc,
- (struct usb_descriptor_header *) &ss_notify_desc,
- (struct usb_descriptor_header *) &ss_intr_comp_desc,
-
- /* data interface has no altsetting */
- (struct usb_descriptor_header *) &rndis_data_intf,
- (struct usb_descriptor_header *) &ss_in_desc,
- (struct usb_descriptor_header *) &ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &ss_out_desc,
- (struct usb_descriptor_header *) &ss_bulk_comp_desc,
- NULL,
-};
-
-/* string descriptors: */
-
-static struct usb_string rndis_string_defs[] = {
- [0].s = "RNDIS Communications Control",
- [1].s = "RNDIS Ethernet Data",
- [2].s = "RNDIS",
- { } /* end of list */
-};
-
-static struct usb_gadget_strings rndis_string_table = {
- .language = 0x0409, /* en-us */
- .strings = rndis_string_defs,
-};
-
-static struct usb_gadget_strings *rndis_strings[] = {
- &rndis_string_table,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static struct sk_buff *rndis_add_header(struct gether *port,
- struct sk_buff *skb)
-{
- struct sk_buff *skb2;
-
- skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
- if (skb2)
- rndis_add_hdr(skb2);
-
- dev_kfree_skb_any(skb);
- return skb2;
-}
-
-static void rndis_response_available(void *_rndis)
-{
- struct f_rndis *rndis = _rndis;
- struct usb_request *req = rndis->notify_req;
- struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
- __le32 *data = req->buf;
- int status;
-
- if (atomic_inc_return(&rndis->notify_count) != 1)
- return;
-
- /* Send RNDIS RESPONSE_AVAILABLE notification; a
- * USB_CDC_NOTIFY_RESPONSE_AVAILABLE "should" work too
- *
- * This is the only notification defined by RNDIS.
- */
- data[0] = cpu_to_le32(1);
- data[1] = cpu_to_le32(0);
-
- status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
- if (status) {
- atomic_dec(&rndis->notify_count);
- DBG(cdev, "notify/0 --> %d\n", status);
- }
-}
-
-static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_rndis *rndis = req->context;
- struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
- int status = req->status;
-
- /* after TX:
- * - USB_CDC_GET_ENCAPSULATED_RESPONSE (ep0/control)
- * - RNDIS_RESPONSE_AVAILABLE (status/irq)
- */
- switch (status) {
- case -ECONNRESET:
- case -ESHUTDOWN:
- /* connection gone */
- atomic_set(&rndis->notify_count, 0);
- break;
- default:
- DBG(cdev, "RNDIS %s response error %d, %d/%d\n",
- ep->name, status,
- req->actual, req->length);
- /* FALLTHROUGH */
- case 0:
- if (ep != rndis->notify)
- break;
-
- /* handle multiple pending RNDIS_RESPONSE_AVAILABLE
- * notifications by resending until we're done
- */
- if (atomic_dec_and_test(&rndis->notify_count))
- break;
- status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
- if (status) {
- atomic_dec(&rndis->notify_count);
- DBG(cdev, "notify/1 --> %d\n", status);
- }
- break;
- }
-}
-
-static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct f_rndis *rndis = req->context;
- struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
- int status;
-
- /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
-// spin_lock(&dev->lock);
- status = rndis_msg_parser(rndis->config, (u8 *) req->buf);
- if (status < 0)
- ERROR(cdev, "RNDIS command error %d, %d/%d\n",
- status, req->actual, req->length);
-// spin_unlock(&dev->lock);
-}
-
-static int
-rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
-{
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
- u16 w_value = le16_to_cpu(ctrl->wValue);
- u16 w_length = le16_to_cpu(ctrl->wLength);
-
- /* composite driver infrastructure handles everything except
- * CDC class messages; interface activation uses set_alt().
- */
- switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
-
- /* RNDIS uses the CDC command encapsulation mechanism to implement
- * an RPC scheme, with much getting/setting of attributes by OID.
- */
- case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_SEND_ENCAPSULATED_COMMAND:
- if (w_value || w_index != rndis->ctrl_id)
- goto invalid;
- /* read the request; process it later */
- value = w_length;
- req->complete = rndis_command_complete;
- req->context = rndis;
- /* later, rndis_response_available() sends a notification */
- break;
-
- case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
- | USB_CDC_GET_ENCAPSULATED_RESPONSE:
- if (w_value || w_index != rndis->ctrl_id)
- goto invalid;
- else {
- u8 *buf;
- u32 n;
-
- /* return the result */
- buf = rndis_get_next_response(rndis->config, &n);
- if (buf) {
- memcpy(req->buf, buf, n);
- req->complete = rndis_response_complete;
- req->context = rndis;
- rndis_free_response(rndis->config, buf);
- value = n;
- }
- /* else stalls ... spec says to avoid that */
- }
- break;
-
- default:
-invalid:
- VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- }
-
- /* respond with data transfer or status phase? */
- if (value >= 0) {
- DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- w_value, w_index, w_length);
- req->zero = (value < w_length);
- req->length = value;
- value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
- if (value < 0)
- ERROR(cdev, "rndis response on err %d\n", value);
- }
-
- /* device either stalls (value < 0) or reports success */
- return value;
-}
-
-
-static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
-{
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- /* we know alt == 0 */
-
- if (intf == rndis->ctrl_id) {
- if (rndis->notify->driver_data) {
- VDBG(cdev, "reset rndis control %d\n", intf);
- usb_ep_disable(rndis->notify);
- }
- if (!rndis->notify->desc) {
- VDBG(cdev, "init rndis ctrl %d\n", intf);
- if (config_ep_by_speed(cdev->gadget, f, rndis->notify))
- goto fail;
- }
- usb_ep_enable(rndis->notify);
- rndis->notify->driver_data = rndis;
-
- } else if (intf == rndis->data_id) {
- struct net_device *net;
-
- if (rndis->port.in_ep->driver_data) {
- DBG(cdev, "reset rndis\n");
- gether_disconnect(&rndis->port);
- }
-
- if (!rndis->port.in_ep->desc || !rndis->port.out_ep->desc) {
- DBG(cdev, "init rndis\n");
- if (config_ep_by_speed(cdev->gadget, f,
- rndis->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f,
- rndis->port.out_ep)) {
- rndis->port.in_ep->desc = NULL;
- rndis->port.out_ep->desc = NULL;
- goto fail;
- }
- }
-
- /* Avoid ZLPs; they can be troublesome. */
- rndis->port.is_zlp_ok = false;
-
- /* RNDIS should be in the "RNDIS uninitialized" state,
- * either never activated or after rndis_uninit().
- *
- * We don't want data to flow here until a nonzero packet
- * filter is set, at which point it enters "RNDIS data
- * initialized" state ... but we do want the endpoints
- * to be activated. It's a strange little state.
- *
- * REVISIT the RNDIS gadget code has done this wrong for a
- * very long time. We need another call to the link layer
- * code -- gether_updown(...bool) maybe -- to do it right.
- */
- rndis->port.cdc_filter = 0;
-
- DBG(cdev, "RNDIS RX/TX early activation ... \n");
- net = gether_connect(&rndis->port);
- if (IS_ERR(net))
- return PTR_ERR(net);
-
- rndis_set_param_dev(rndis->config, net,
- &rndis->port.cdc_filter);
- } else
- goto fail;
-
- return 0;
-fail:
- return -EINVAL;
-}
-
-static void rndis_disable(struct usb_function *f)
-{
- struct f_rndis *rndis = func_to_rndis(f);
- struct usb_composite_dev *cdev = f->config->cdev;
-
- if (!rndis->notify->driver_data)
- return;
-
- DBG(cdev, "rndis deactivated\n");
-
- rndis_uninit(rndis->config);
- gether_disconnect(&rndis->port);
-
- usb_ep_disable(rndis->notify);
- rndis->notify->driver_data = NULL;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * This isn't quite the same mechanism as CDC Ethernet, since the
- * notification scheme passes less data, but the same set of link
- * states must be tested. A key difference is that altsettings are
- * not used to tell whether the link should send packets or not.
- */
-
-static void rndis_open(struct gether *geth)
-{
- struct f_rndis *rndis = func_to_rndis(&geth->func);
- struct usb_composite_dev *cdev = geth->func.config->cdev;
-
- DBG(cdev, "%s\n", __func__);
-
- rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3,
- bitrate(cdev->gadget) / 100);
- rndis_signal_connect(rndis->config);
-}
-
-static void rndis_close(struct gether *geth)
-{
- struct f_rndis *rndis = func_to_rndis(&geth->func);
-
- DBG(geth->func.config->cdev, "%s\n", __func__);
-
- rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
- rndis_signal_disconnect(rndis->config);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* ethernet function driver setup/binding */
-
-static int
-rndis_bind(struct usb_configuration *c, struct usb_function *f)
-{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_rndis *rndis = func_to_rndis(f);
- int status;
- struct usb_ep *ep;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- rndis->ctrl_id = status;
- rndis_iad_descriptor.bFirstInterface = status;
-
- rndis_control_intf.bInterfaceNumber = status;
- rndis_union_desc.bMasterInterface0 = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- rndis->data_id = status;
-
- rndis_data_intf.bInterfaceNumber = status;
- rndis_union_desc.bSlaveInterface0 = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_in_desc);
- if (!ep)
- goto fail;
- rndis->port.in_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_out_desc);
- if (!ep)
- goto fail;
- rndis->port.out_ep = ep;
- ep->driver_data = cdev; /* claim */
-
- /* NOTE: a status/notification endpoint is, strictly speaking,
- * optional. We don't treat it that way though! It's simpler,
- * and some newer profiles don't treat it as optional.
- */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_notify_desc);
- if (!ep)
- goto fail;
- rndis->notify = ep;
- ep->driver_data = cdev; /* claim */
-
- status = -ENOMEM;
-
- /* allocate notification request and buffer */
- rndis->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
- if (!rndis->notify_req)
- goto fail;
- rndis->notify_req->buf = kmalloc(STATUS_BYTECOUNT, GFP_KERNEL);
- if (!rndis->notify_req->buf)
- goto fail;
- rndis->notify_req->length = STATUS_BYTECOUNT;
- rndis->notify_req->context = rndis;
- rndis->notify_req->complete = rndis_response_complete;
-
- /* copy descriptors, and track endpoint copies */
- f->descriptors = usb_copy_descriptors(eth_fs_function);
- if (!f->descriptors)
- goto fail;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- if (gadget_is_dualspeed(c->cdev->gadget)) {
- hs_in_desc.bEndpointAddress =
- fs_in_desc.bEndpointAddress;
- hs_out_desc.bEndpointAddress =
- fs_out_desc.bEndpointAddress;
- hs_notify_desc.bEndpointAddress =
- fs_notify_desc.bEndpointAddress;
-
- /* copy descriptors, and track endpoint copies */
- f->hs_descriptors = usb_copy_descriptors(eth_hs_function);
- if (!f->hs_descriptors)
- goto fail;
- }
-
- if (gadget_is_superspeed(c->cdev->gadget)) {
- ss_in_desc.bEndpointAddress =
- fs_in_desc.bEndpointAddress;
- ss_out_desc.bEndpointAddress =
- fs_out_desc.bEndpointAddress;
- ss_notify_desc.bEndpointAddress =
- fs_notify_desc.bEndpointAddress;
-
- /* copy descriptors, and track endpoint copies */
- f->ss_descriptors = usb_copy_descriptors(eth_ss_function);
- if (!f->ss_descriptors)
- goto fail;
- }
-
- rndis->port.open = rndis_open;
- rndis->port.close = rndis_close;
-
- status = rndis_register(rndis_response_available, rndis);
- if (status < 0)
- goto fail;
- rndis->config = status;
-
- rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
- rndis_set_host_mac(rndis->config, rndis->ethaddr);
-
- if (rndis->manufacturer && rndis->vendorID &&
- rndis_set_param_vendor(rndis->config, rndis->vendorID,
- rndis->manufacturer))
- goto fail;
-
- /* NOTE: all that is done without knowing or caring about
- * the network link ... which is unavailable to this code
- * until we're activated via set_alt().
- */
-
- DBG(cdev, "RNDIS: %s speed IN/%s OUT/%s NOTIFY/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- rndis->port.in_ep->name, rndis->port.out_ep->name,
- rndis->notify->name);
- return 0;
-
-fail:
- if (gadget_is_superspeed(c->cdev->gadget) && f->ss_descriptors)
- usb_free_descriptors(f->ss_descriptors);
- if (gadget_is_dualspeed(c->cdev->gadget) && f->hs_descriptors)
- usb_free_descriptors(f->hs_descriptors);
- if (f->descriptors)
- usb_free_descriptors(f->descriptors);
-
- if (rndis->notify_req) {
- kfree(rndis->notify_req->buf);
- usb_ep_free_request(rndis->notify, rndis->notify_req);
- }
-
- /* we might as well release our claims on endpoints */
- if (rndis->notify)
- rndis->notify->driver_data = NULL;
- if (rndis->port.out_ep->desc)
- rndis->port.out_ep->driver_data = NULL;
- if (rndis->port.in_ep->desc)
- rndis->port.in_ep->driver_data = NULL;
-
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
-}
-
-static void
-rndis_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- struct f_rndis *rndis = func_to_rndis(f);
-
- rndis_deregister(rndis->config);
- rndis_exit();
- rndis_string_defs[0].id = 0;
-
- if (gadget_is_superspeed(c->cdev->gadget))
- usb_free_descriptors(f->ss_descriptors);
- if (gadget_is_dualspeed(c->cdev->gadget))
- usb_free_descriptors(f->hs_descriptors);
- usb_free_descriptors(f->descriptors);
-
- kfree(rndis->notify_req->buf);
- usb_ep_free_request(rndis->notify, rndis->notify_req);
-
- kfree(rndis);
-}
-
-/* Some controllers can't support RNDIS ... */
-static inline bool can_support_rndis(struct usb_configuration *c)
-{
- /* everything else is *presumably* fine */
- return true;
-}
-
-int
-rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
- u32 vendorID, const char *manufacturer)
-{
- struct f_rndis *rndis;
- int status;
-
- if (!can_support_rndis(c) || !ethaddr)
- return -EINVAL;
-
- /* maybe allocate device-global string IDs */
- if (rndis_string_defs[0].id == 0) {
-
- /* ... and setup RNDIS itself */
- status = rndis_init();
- if (status < 0)
- return status;
-
- /* control interface label */
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- rndis_string_defs[0].id = status;
- rndis_control_intf.iInterface = status;
-
- /* data interface label */
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- rndis_string_defs[1].id = status;
- rndis_data_intf.iInterface = status;
-
- /* IAD iFunction label */
- status = usb_string_id(c->cdev);
- if (status < 0)
- return status;
- rndis_string_defs[2].id = status;
- rndis_iad_descriptor.iFunction = status;
- }
-
- /* allocate and initialize one new instance */
- status = -ENOMEM;
- rndis = kzalloc(sizeof *rndis, GFP_KERNEL);
- if (!rndis)
- goto fail;
-
- memcpy(rndis->ethaddr, ethaddr, ETH_ALEN);
- rndis->vendorID = vendorID;
- rndis->manufacturer = manufacturer;
-
- /* RNDIS activates when the host changes this filter */
- rndis->port.cdc_filter = 0;
-
- /* RNDIS has special (and complex) framing */
- rndis->port.header_len = sizeof(struct rndis_packet_msg_type);
- rndis->port.wrap = rndis_add_header;
- rndis->port.unwrap = rndis_rm_hdr;
-
- rndis->port.func.name = "rndis";
- rndis->port.func.strings = rndis_strings;
- /* descriptors are per-instance copies */
- rndis->port.func.bind = rndis_bind;
- rndis->port.func.unbind = rndis_unbind;
- rndis->port.func.set_alt = rndis_set_alt;
- rndis->port.func.setup = rndis_setup;
- rndis->port.func.disable = rndis_disable;
-
- status = usb_add_function(c, &rndis->port.func);
- if (status) {
- kfree(rndis);
-fail:
- rndis_exit();
- }
- return status;
-}
+++ /dev/null
-/*
- * USB device controllers have lots of quirks. Use these macros in
- * gadget drivers or other code that needs to deal with them, and which
- * autoconfigures instead of using early binding to the hardware.
- *
- * This SHOULD eventually work like the ARM mach_is_*() stuff, driven by
- * some config file that gets updated as new hardware is supported.
- * (And avoiding all runtime comparisons in typical one-choice configs!)
- *
- * NOTE: some of these controller drivers may not be available yet.
- * Some are available on 2.4 kernels; several are available, but not
- * yet pushed in the 2.6 mainline tree.
- */
-
-#ifndef __GADGET_CHIPS_H
-#define __GADGET_CHIPS_H
-
-/*
- * NOTICE: the entries below are alphabetical and should be kept
- * that way.
- *
- * Always be sure to add new entries to the correct position or
- * accept the bashing later.
- *
- * If you have forgotten the alphabetical order let VIM/EMACS
- * do that for you.
- */
-#define gadget_is_amd5536udc(g) (!strcmp("amd5536udc", (g)->name))
-#define gadget_is_at91(g) (!strcmp("at91_udc", (g)->name))
-#define gadget_is_atmel_usba(g) (!strcmp("atmel_usba_udc", (g)->name))
-#define gadget_is_bcm63xx(g) (!strcmp("bcm63xx_udc", (g)->name))
-#define gadget_is_ci13xxx_msm(g) (!strcmp("ci13xxx_msm", (g)->name))
-#define gadget_is_ci13xxx_pci(g) (!strcmp("ci13xxx_pci", (g)->name))
-#define gadget_is_dummy(g) (!strcmp("dummy_udc", (g)->name))
-#define gadget_is_dwc3(g) (!strcmp("dwc3-gadget", (g)->name))
-#define gadget_is_fsl_qe(g) (!strcmp("fsl_qe_udc", (g)->name))
-#define gadget_is_fsl_usb2(g) (!strcmp("fsl-usb2-udc", (g)->name))
-#define gadget_is_goku(g) (!strcmp("goku_udc", (g)->name))
-#define gadget_is_imx(g) (!strcmp("imx_udc", (g)->name))
-#define gadget_is_langwell(g) (!strcmp("langwell_udc", (g)->name))
-#define gadget_is_lpc32xx(g) (!strcmp("lpc32xx_udc", (g)->name))
-#define gadget_is_m66592(g) (!strcmp("m66592_udc", (g)->name))
-#define gadget_is_musbhdrc(g) (!strcmp("musb-hdrc", (g)->name))
-#define gadget_is_net2272(g) (!strcmp("net2272", (g)->name))
-#define gadget_is_net2280(g) (!strcmp("net2280", (g)->name))
-#define gadget_is_omap(g) (!strcmp("omap_udc", (g)->name))
-#define gadget_is_pch(g) (!strcmp("pch_udc", (g)->name))
-#define gadget_is_pxa(g) (!strcmp("pxa25x_udc", (g)->name))
-#define gadget_is_pxa27x(g) (!strcmp("pxa27x_udc", (g)->name))
-#define gadget_is_r8a66597(g) (!strcmp("r8a66597_udc", (g)->name))
-#define gadget_is_renesas_usbhs(g) (!strcmp("renesas_usbhs_udc", (g)->name))
-#define gadget_is_s3c2410(g) (!strcmp("s3c2410_udc", (g)->name))
-#define gadget_is_s3c_hsotg(g) (!strcmp("s3c-hsotg", (g)->name))
-#define gadget_is_s3c_hsudc(g) (!strcmp("s3c-hsudc", (g)->name))
-
-/**
- * usb_gadget_controller_number - support bcdDevice id convention
- * @gadget: the controller being driven
- *
- * Return a 2-digit BCD value associated with the peripheral controller,
- * suitable for use as part of a bcdDevice value, or a negative error code.
- *
- * NOTE: this convention is purely optional, and has no meaning in terms of
- * any USB specification. If you want to use a different convention in your
- * gadget driver firmware -- maybe a more formal revision ID -- feel free.
- *
- * Hosts see these bcdDevice numbers, and are allowed (but not encouraged!)
- * to change their behavior accordingly. For example it might help avoiding
- * some chip bug.
- */
-static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
-{
- if (gadget_is_net2280(gadget))
- return 0x01;
- else if (gadget_is_dummy(gadget))
- return 0x02;
- else if (gadget_is_pxa(gadget))
- return 0x03;
- else if (gadget_is_goku(gadget))
- return 0x06;
- else if (gadget_is_omap(gadget))
- return 0x08;
- else if (gadget_is_pxa27x(gadget))
- return 0x11;
- else if (gadget_is_s3c2410(gadget))
- return 0x12;
- else if (gadget_is_at91(gadget))
- return 0x13;
- else if (gadget_is_imx(gadget))
- return 0x14;
- else if (gadget_is_musbhdrc(gadget))
- return 0x16;
- else if (gadget_is_atmel_usba(gadget))
- return 0x18;
- else if (gadget_is_fsl_usb2(gadget))
- return 0x19;
- else if (gadget_is_amd5536udc(gadget))
- return 0x20;
- else if (gadget_is_m66592(gadget))
- return 0x21;
- else if (gadget_is_fsl_qe(gadget))
- return 0x22;
- else if (gadget_is_ci13xxx_pci(gadget))
- return 0x23;
- else if (gadget_is_langwell(gadget))
- return 0x24;
- else if (gadget_is_r8a66597(gadget))
- return 0x25;
- else if (gadget_is_s3c_hsotg(gadget))
- return 0x26;
- else if (gadget_is_pch(gadget))
- return 0x27;
- else if (gadget_is_ci13xxx_msm(gadget))
- return 0x28;
- else if (gadget_is_renesas_usbhs(gadget))
- return 0x29;
- else if (gadget_is_s3c_hsudc(gadget))
- return 0x30;
- else if (gadget_is_net2272(gadget))
- return 0x31;
- else if (gadget_is_dwc3(gadget))
- return 0x32;
- else if (gadget_is_lpc32xx(gadget))
- return 0x33;
- else if (gadget_is_bcm63xx(gadget))
- return 0x34;
-
- return -ENOENT;
-}
-
-
-/**
- * gadget_supports_altsettings - return true if altsettings work
- * @gadget: the gadget in question
- */
-static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
-{
- /* PXA 21x/25x/26x has no altsettings at all */
- if (gadget_is_pxa(gadget))
- return false;
-
- /* PXA 27x and 3xx have *broken* altsetting support */
- if (gadget_is_pxa27x(gadget))
- return false;
-
- /* Everything else is *presumably* fine ... */
- return true;
-}
-
-#endif /* __GADGET_CHIPS_H */
+++ /dev/null
-/*
- * ndis.h
- *
- * ntddndis.h modified by Benedikt Spranger <b.spranger@pengutronix.de>
- *
- * Thanks to the cygwin development team,
- * espacially to Casper S. Hornstrup <chorns@users.sourceforge.net>
- *
- * THIS SOFTWARE IS NOT COPYRIGHTED
- *
- * This source code is offered for use in the public domain. You may
- * use, modify or distribute it freely.
- */
-
-#ifndef _LINUX_NDIS_H
-#define _LINUX_NDIS_H
-
-enum NDIS_DEVICE_POWER_STATE {
- NdisDeviceStateUnspecified = 0,
- NdisDeviceStateD0,
- NdisDeviceStateD1,
- NdisDeviceStateD2,
- NdisDeviceStateD3,
- NdisDeviceStateMaximum
-};
-
-struct NDIS_PM_WAKE_UP_CAPABILITIES {
- enum NDIS_DEVICE_POWER_STATE MinMagicPacketWakeUp;
- enum NDIS_DEVICE_POWER_STATE MinPatternWakeUp;
- enum NDIS_DEVICE_POWER_STATE MinLinkChangeWakeUp;
-};
-
-struct NDIS_PNP_CAPABILITIES {
- __le32 Flags;
- struct NDIS_PM_WAKE_UP_CAPABILITIES WakeUpCapabilities;
-};
-
-struct NDIS_PM_PACKET_PATTERN {
- __le32 Priority;
- __le32 Reserved;
- __le32 MaskSize;
- __le32 PatternOffset;
- __le32 PatternSize;
- __le32 PatternFlags;
-};
-
-#endif /* _LINUX_NDIS_H */
+++ /dev/null
-/*
- * RNDIS MSG parser
- *
- * Authors: Benedikt Spranger, Pengutronix
- * Robert Schwebel, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2, as published by the Free Software Foundation.
- *
- * This software was originally developed in conformance with
- * Microsoft's Remote NDIS Specification License Agreement.
- *
- * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
- * Fixed message length bug in init_response
- *
- * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
- * Fixed rndis_rm_hdr length bug.
- *
- * Copyright (C) 2004 by David Brownell
- * updates to merge with Linux 2.6, better match RNDIS spec
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <linux/seq_file.h>
-#include <linux/netdevice.h>
-
-#include <asm/io.h>
-#include <asm/byteorder.h>
-#include <asm/unaligned.h>
-
-
-#undef VERBOSE_DEBUG
-
-#include "rndis.h"
-
-
-/* The driver for your USB chip needs to support ep0 OUT to work with
- * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
- *
- * Windows hosts need an INF file like Documentation/usb/linux.inf
- * and will be happier if you provide the host_addr module parameter.
- */
-
-#if 0
-static int rndis_debug = 0;
-module_param (rndis_debug, int, 0);
-MODULE_PARM_DESC (rndis_debug, "enable debugging");
-#else
-#define rndis_debug 0
-#endif
-
-#define RNDIS_MAX_CONFIGS 1
-
-
-static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
-
-/* Driver Version */
-static const __le32 rndis_driver_version = cpu_to_le32(1);
-
-/* Function Prototypes */
-static rndis_resp_t *rndis_add_response(int configNr, u32 length);
-
-
-/* supported OIDs */
-static const u32 oid_supported_list[] =
-{
- /* the general stuff */
- RNDIS_OID_GEN_SUPPORTED_LIST,
- RNDIS_OID_GEN_HARDWARE_STATUS,
- RNDIS_OID_GEN_MEDIA_SUPPORTED,
- RNDIS_OID_GEN_MEDIA_IN_USE,
- RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
- RNDIS_OID_GEN_LINK_SPEED,
- RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
- RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
- RNDIS_OID_GEN_VENDOR_ID,
- RNDIS_OID_GEN_VENDOR_DESCRIPTION,
- RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
- RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
- RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
- RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
- RNDIS_OID_GEN_PHYSICAL_MEDIUM,
-
- /* the statistical stuff */
- RNDIS_OID_GEN_XMIT_OK,
- RNDIS_OID_GEN_RCV_OK,
- RNDIS_OID_GEN_XMIT_ERROR,
- RNDIS_OID_GEN_RCV_ERROR,
- RNDIS_OID_GEN_RCV_NO_BUFFER,
-#ifdef RNDIS_OPTIONAL_STATS
- RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
- RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
- RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
- RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
- RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
- RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
- RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
- RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
- RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
- RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
- RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
- RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
- RNDIS_OID_GEN_RCV_CRC_ERROR,
- RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
-#endif /* RNDIS_OPTIONAL_STATS */
-
- /* mandatory 802.3 */
- /* the general stuff */
- RNDIS_OID_802_3_PERMANENT_ADDRESS,
- RNDIS_OID_802_3_CURRENT_ADDRESS,
- RNDIS_OID_802_3_MULTICAST_LIST,
- RNDIS_OID_802_3_MAC_OPTIONS,
- RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
-
- /* the statistical stuff */
- RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
- RNDIS_OID_802_3_XMIT_ONE_COLLISION,
- RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
-#ifdef RNDIS_OPTIONAL_STATS
- RNDIS_OID_802_3_XMIT_DEFERRED,
- RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
- RNDIS_OID_802_3_RCV_OVERRUN,
- RNDIS_OID_802_3_XMIT_UNDERRUN,
- RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
- RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
- RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
-#endif /* RNDIS_OPTIONAL_STATS */
-
-#ifdef RNDIS_PM
- /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
- * don't say what they mean ... and the NDIS specs are often
- * confusing and/or ambiguous in this context. (That is, more
- * so than their specs for the other OIDs.)
- *
- * FIXME someone who knows what these should do, please
- * implement them!
- */
-
- /* power management */
- OID_PNP_CAPABILITIES,
- OID_PNP_QUERY_POWER,
- OID_PNP_SET_POWER,
-
-#ifdef RNDIS_WAKEUP
- /* wake up host */
- OID_PNP_ENABLE_WAKE_UP,
- OID_PNP_ADD_WAKE_UP_PATTERN,
- OID_PNP_REMOVE_WAKE_UP_PATTERN,
-#endif /* RNDIS_WAKEUP */
-#endif /* RNDIS_PM */
-};
-
-
-/* NDIS Functions */
-static int gen_ndis_query_resp(int configNr, u32 OID, u8 *buf,
- unsigned buf_len, rndis_resp_t *r)
-{
- int retval = -ENOTSUPP;
- u32 length = 4; /* usually */
- __le32 *outbuf;
- int i, count;
- rndis_query_cmplt_type *resp;
- struct net_device *net;
- struct rtnl_link_stats64 temp;
- const struct rtnl_link_stats64 *stats;
-
- if (!r) return -ENOMEM;
- resp = (rndis_query_cmplt_type *)r->buf;
-
- if (!resp) return -ENOMEM;
-
- if (buf_len && rndis_debug > 1) {
- pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
- for (i = 0; i < buf_len; i += 16) {
- pr_debug("%03d: %08x %08x %08x %08x\n", i,
- get_unaligned_le32(&buf[i]),
- get_unaligned_le32(&buf[i + 4]),
- get_unaligned_le32(&buf[i + 8]),
- get_unaligned_le32(&buf[i + 12]));
- }
- }
-
- /* response goes here, right after the header */
- outbuf = (__le32 *)&resp[1];
- resp->InformationBufferOffset = cpu_to_le32(16);
-
- net = rndis_per_dev_params[configNr].dev;
- stats = dev_get_stats(net, &temp);
-
- switch (OID) {
-
- /* general oids (table 4-1) */
-
- /* mandatory */
- case RNDIS_OID_GEN_SUPPORTED_LIST:
- pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
- length = sizeof(oid_supported_list);
- count = length / sizeof(u32);
- for (i = 0; i < count; i++)
- outbuf[i] = cpu_to_le32(oid_supported_list[i]);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_HARDWARE_STATUS:
- pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
- /* Bogus question!
- * Hardware must be ready to receive high level protocols.
- * BTW:
- * reddite ergo quae sunt Caesaris Caesari
- * et quae sunt Dei Deo!
- */
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MEDIA_SUPPORTED:
- pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
- *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MEDIA_IN_USE:
- pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
- /* one medium, one transport... (maybe you do it better) */
- *outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].dev->mtu);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_LINK_SPEED:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
- if (rndis_per_dev_params[configNr].media_state
- == RNDIS_MEDIA_STATE_DISCONNECTED)
- *outbuf = cpu_to_le32(0);
- else
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].speed);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].dev->mtu);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].dev->mtu);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_VENDOR_ID:
- pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
- *outbuf = cpu_to_le32(
- rndis_per_dev_params[configNr].vendorID);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
- pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
- if (rndis_per_dev_params[configNr].vendorDescr) {
- length = strlen(rndis_per_dev_params[configNr].
- vendorDescr);
- memcpy(outbuf,
- rndis_per_dev_params[configNr].vendorDescr,
- length);
- } else {
- outbuf[0] = 0;
- }
- retval = 0;
- break;
-
- case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
- pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
- /* Created as LE */
- *outbuf = rndis_driver_version;
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
- pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
- *outbuf = cpu_to_le32(*rndis_per_dev_params[configNr].filter);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
- pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
- *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
- *outbuf = cpu_to_le32(rndis_per_dev_params[configNr]
- .media_state);
- retval = 0;
- break;
-
- case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
- pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* The RNDIS specification is incomplete/wrong. Some versions
- * of MS-Windows expect OIDs that aren't specified there. Other
- * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
- */
- case RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */
- pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
- *outbuf = cpu_to_le32(
- RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
- | RNDIS_MAC_OPTION_FULL_DUPLEX);
- retval = 0;
- break;
-
- /* statistics OIDs (table 4-2) */
-
- /* mandatory */
- case RNDIS_OID_GEN_XMIT_OK:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->tx_packets
- - stats->tx_errors - stats->tx_dropped);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RCV_OK:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_packets
- - stats->rx_errors - stats->rx_dropped);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_XMIT_ERROR:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->tx_errors);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RCV_ERROR:
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_errors);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_GEN_RCV_NO_BUFFER:
- pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_dropped);
- retval = 0;
- }
- break;
-
- /* ieee802.3 OIDs (table 4-3) */
-
- /* mandatory */
- case RNDIS_OID_802_3_PERMANENT_ADDRESS:
- pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- length = ETH_ALEN;
- memcpy(outbuf,
- rndis_per_dev_params[configNr].host_mac,
- length);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_CURRENT_ADDRESS:
- pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
- if (rndis_per_dev_params[configNr].dev) {
- length = ETH_ALEN;
- memcpy(outbuf,
- rndis_per_dev_params [configNr].host_mac,
- length);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_MULTICAST_LIST:
- pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
- /* Multicast base address only */
- *outbuf = cpu_to_le32(0xE0000000);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
- pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
- /* Multicast base address only */
- *outbuf = cpu_to_le32(1);
- retval = 0;
- break;
-
- case RNDIS_OID_802_3_MAC_OPTIONS:
- pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* ieee802.3 statistics OIDs (table 4-4) */
-
- /* mandatory */
- case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
- pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
- if (stats) {
- *outbuf = cpu_to_le32(stats->rx_frame_errors);
- retval = 0;
- }
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
- pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- /* mandatory */
- case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
- pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
- *outbuf = cpu_to_le32(0);
- retval = 0;
- break;
-
- default:
- pr_warning("%s: query unknown OID 0x%08X\n",
- __func__, OID);
- }
- if (retval < 0)
- length = 0;
-
- resp->InformationBufferLength = cpu_to_le32(length);
- r->length = length + sizeof(*resp);
- resp->MessageLength = cpu_to_le32(r->length);
- return retval;
-}
-
-static int gen_ndis_set_resp(u8 configNr, u32 OID, u8 *buf, u32 buf_len,
- rndis_resp_t *r)
-{
- rndis_set_cmplt_type *resp;
- int i, retval = -ENOTSUPP;
- struct rndis_params *params;
-
- if (!r)
- return -ENOMEM;
- resp = (rndis_set_cmplt_type *)r->buf;
- if (!resp)
- return -ENOMEM;
-
- if (buf_len && rndis_debug > 1) {
- pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
- for (i = 0; i < buf_len; i += 16) {
- pr_debug("%03d: %08x %08x %08x %08x\n", i,
- get_unaligned_le32(&buf[i]),
- get_unaligned_le32(&buf[i + 4]),
- get_unaligned_le32(&buf[i + 8]),
- get_unaligned_le32(&buf[i + 12]));
- }
- }
-
- params = &rndis_per_dev_params[configNr];
- switch (OID) {
- case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
-
- /* these NDIS_PACKET_TYPE_* bitflags are shared with
- * cdc_filter; it's not RNDIS-specific
- * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
- * PROMISCUOUS, DIRECTED,
- * MULTICAST, ALL_MULTICAST, BROADCAST
- */
- *params->filter = (u16)get_unaligned_le32(buf);
- pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
- __func__, *params->filter);
-
- /* this call has a significant side effect: it's
- * what makes the packet flow start and stop, like
- * activating the CDC Ethernet altsetting.
- */
- retval = 0;
- if (*params->filter) {
- params->state = RNDIS_DATA_INITIALIZED;
- netif_carrier_on(params->dev);
- if (netif_running(params->dev))
- netif_wake_queue(params->dev);
- } else {
- params->state = RNDIS_INITIALIZED;
- netif_carrier_off(params->dev);
- netif_stop_queue(params->dev);
- }
- break;
-
- case RNDIS_OID_802_3_MULTICAST_LIST:
- /* I think we can ignore this */
- pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
- retval = 0;
- break;
-
- default:
- pr_warning("%s: set unknown OID 0x%08X, size %d\n",
- __func__, OID, buf_len);
- }
-
- return retval;
-}
-
-/*
- * Response Functions
- */
-
-static int rndis_init_response(int configNr, rndis_init_msg_type *buf)
-{
- rndis_init_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- if (!params->dev)
- return -ENOTSUPP;
-
- r = rndis_add_response(configNr, sizeof(rndis_init_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_init_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
- resp->MessageLength = cpu_to_le32(52);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
- resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
- resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
- resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
- resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
- resp->MaxPacketsPerTransfer = cpu_to_le32(1);
- resp->MaxTransferSize = cpu_to_le32(
- params->dev->mtu
- + sizeof(struct ethhdr)
- + sizeof(struct rndis_packet_msg_type)
- + 22);
- resp->PacketAlignmentFactor = cpu_to_le32(0);
- resp->AFListOffset = cpu_to_le32(0);
- resp->AFListSize = cpu_to_le32(0);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_query_response(int configNr, rndis_query_msg_type *buf)
-{
- rndis_query_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
- if (!params->dev)
- return -ENOTSUPP;
-
- /*
- * we need more memory:
- * gen_ndis_query_resp expects enough space for
- * rndis_query_cmplt_type followed by data.
- * oid_supported_list is the largest data reply
- */
- r = rndis_add_response(configNr,
- sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_query_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
-
- if (gen_ndis_query_resp(configNr, le32_to_cpu(buf->OID),
- le32_to_cpu(buf->InformationBufferOffset)
- + 8 + (u8 *)buf,
- le32_to_cpu(buf->InformationBufferLength),
- r)) {
- /* OID not supported */
- resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
- resp->MessageLength = cpu_to_le32(sizeof *resp);
- resp->InformationBufferLength = cpu_to_le32(0);
- resp->InformationBufferOffset = cpu_to_le32(0);
- } else
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_set_response(int configNr, rndis_set_msg_type *buf)
-{
- u32 BufLength, BufOffset;
- rndis_set_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- r = rndis_add_response(configNr, sizeof(rndis_set_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_set_cmplt_type *)r->buf;
-
- BufLength = le32_to_cpu(buf->InformationBufferLength);
- BufOffset = le32_to_cpu(buf->InformationBufferOffset);
-
-#ifdef VERBOSE_DEBUG
- pr_debug("%s: Length: %d\n", __func__, BufLength);
- pr_debug("%s: Offset: %d\n", __func__, BufOffset);
- pr_debug("%s: InfoBuffer: ", __func__);
-
- for (i = 0; i < BufLength; i++) {
- pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
- }
-
- pr_debug("\n");
-#endif
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
- resp->MessageLength = cpu_to_le32(16);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
- if (gen_ndis_set_resp(configNr, le32_to_cpu(buf->OID),
- ((u8 *)buf) + 8 + BufOffset, BufLength, r))
- resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
- else
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_reset_response(int configNr, rndis_reset_msg_type *buf)
-{
- rndis_reset_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_reset_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
- resp->MessageLength = cpu_to_le32(16);
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
- /* resent information */
- resp->AddressingReset = cpu_to_le32(1);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-static int rndis_keepalive_response(int configNr,
- rndis_keepalive_msg_type *buf)
-{
- rndis_keepalive_cmplt_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- /* host "should" check only in RNDIS_DATA_INITIALIZED state */
-
- r = rndis_add_response(configNr, sizeof(rndis_keepalive_cmplt_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_keepalive_cmplt_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
- resp->MessageLength = cpu_to_le32(16);
- resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
- resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-
-/*
- * Device to Host Comunication
- */
-static int rndis_indicate_status_msg(int configNr, u32 status)
-{
- rndis_indicate_status_msg_type *resp;
- rndis_resp_t *r;
- struct rndis_params *params = rndis_per_dev_params + configNr;
-
- if (params->state == RNDIS_UNINITIALIZED)
- return -ENOTSUPP;
-
- r = rndis_add_response(configNr,
- sizeof(rndis_indicate_status_msg_type));
- if (!r)
- return -ENOMEM;
- resp = (rndis_indicate_status_msg_type *)r->buf;
-
- resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
- resp->MessageLength = cpu_to_le32(20);
- resp->Status = cpu_to_le32(status);
- resp->StatusBufferLength = cpu_to_le32(0);
- resp->StatusBufferOffset = cpu_to_le32(0);
-
- params->resp_avail(params->v);
- return 0;
-}
-
-int rndis_signal_connect(int configNr)
-{
- rndis_per_dev_params[configNr].media_state
- = RNDIS_MEDIA_STATE_CONNECTED;
- return rndis_indicate_status_msg(configNr,
- RNDIS_STATUS_MEDIA_CONNECT);
-}
-
-int rndis_signal_disconnect(int configNr)
-{
- rndis_per_dev_params[configNr].media_state
- = RNDIS_MEDIA_STATE_DISCONNECTED;
- return rndis_indicate_status_msg(configNr,
- RNDIS_STATUS_MEDIA_DISCONNECT);
-}
-
-void rndis_uninit(int configNr)
-{
- u8 *buf;
- u32 length;
-
- if (configNr >= RNDIS_MAX_CONFIGS)
- return;
- rndis_per_dev_params[configNr].state = RNDIS_UNINITIALIZED;
-
- /* drain the response queue */
- while ((buf = rndis_get_next_response(configNr, &length)))
- rndis_free_response(configNr, buf);
-}
-
-void rndis_set_host_mac(int configNr, const u8 *addr)
-{
- rndis_per_dev_params[configNr].host_mac = addr;
-}
-
-/*
- * Message Parser
- */
-int rndis_msg_parser(u8 configNr, u8 *buf)
-{
- u32 MsgType, MsgLength;
- __le32 *tmp;
- struct rndis_params *params;
-
- if (!buf)
- return -ENOMEM;
-
- tmp = (__le32 *)buf;
- MsgType = get_unaligned_le32(tmp++);
- MsgLength = get_unaligned_le32(tmp++);
-
- if (configNr >= RNDIS_MAX_CONFIGS)
- return -ENOTSUPP;
- params = &rndis_per_dev_params[configNr];
-
- /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
- * rx/tx statistics and link status, in addition to KEEPALIVE traffic
- * and normal HC level polling to see if there's any IN traffic.
- */
-
- /* For USB: responses may take up to 10 seconds */
- switch (MsgType) {
- case RNDIS_MSG_INIT:
- pr_debug("%s: RNDIS_MSG_INIT\n",
- __func__);
- params->state = RNDIS_INITIALIZED;
- return rndis_init_response(configNr,
- (rndis_init_msg_type *)buf);
-
- case RNDIS_MSG_HALT:
- pr_debug("%s: RNDIS_MSG_HALT\n",
- __func__);
- params->state = RNDIS_UNINITIALIZED;
- if (params->dev) {
- netif_carrier_off(params->dev);
- netif_stop_queue(params->dev);
- }
- return 0;
-
- case RNDIS_MSG_QUERY:
- return rndis_query_response(configNr,
- (rndis_query_msg_type *)buf);
-
- case RNDIS_MSG_SET:
- return rndis_set_response(configNr,
- (rndis_set_msg_type *)buf);
-
- case RNDIS_MSG_RESET:
- pr_debug("%s: RNDIS_MSG_RESET\n",
- __func__);
- return rndis_reset_response(configNr,
- (rndis_reset_msg_type *)buf);
-
- case RNDIS_MSG_KEEPALIVE:
- /* For USB: host does this every 5 seconds */
- if (rndis_debug > 1)
- pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
- __func__);
- return rndis_keepalive_response(configNr,
- (rndis_keepalive_msg_type *)
- buf);
-
- default:
- /* At least Windows XP emits some undefined RNDIS messages.
- * In one case those messages seemed to relate to the host
- * suspending itself.
- */
- pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
- __func__, MsgType, MsgLength);
- print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
- buf, MsgLength);
- break;
- }
-
- return -ENOTSUPP;
-}
-
-int rndis_register(void (*resp_avail)(void *v), void *v)
-{
- u8 i;
-
- if (!resp_avail)
- return -EINVAL;
-
- for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
- if (!rndis_per_dev_params[i].used) {
- rndis_per_dev_params[i].used = 1;
- rndis_per_dev_params[i].resp_avail = resp_avail;
- rndis_per_dev_params[i].v = v;
- pr_debug("%s: configNr = %d\n", __func__, i);
- return i;
- }
- }
- pr_debug("failed\n");
-
- return -ENODEV;
-}
-
-void rndis_deregister(int configNr)
-{
- pr_debug("%s:\n", __func__);
-
- if (configNr >= RNDIS_MAX_CONFIGS) return;
- rndis_per_dev_params[configNr].used = 0;
-}
-
-int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
-{
- pr_debug("%s:\n", __func__);
- if (!dev)
- return -EINVAL;
- if (configNr >= RNDIS_MAX_CONFIGS) return -1;
-
- rndis_per_dev_params[configNr].dev = dev;
- rndis_per_dev_params[configNr].filter = cdc_filter;
-
- return 0;
-}
-
-int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
-{
- pr_debug("%s:\n", __func__);
- if (!vendorDescr) return -1;
- if (configNr >= RNDIS_MAX_CONFIGS) return -1;
-
- rndis_per_dev_params[configNr].vendorID = vendorID;
- rndis_per_dev_params[configNr].vendorDescr = vendorDescr;
-
- return 0;
-}
-
-int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
-{
- pr_debug("%s: %u %u\n", __func__, medium, speed);
- if (configNr >= RNDIS_MAX_CONFIGS) return -1;
-
- rndis_per_dev_params[configNr].medium = medium;
- rndis_per_dev_params[configNr].speed = speed;
-
- return 0;
-}
-
-void rndis_add_hdr(struct sk_buff *skb)
-{
- struct rndis_packet_msg_type *header;
-
- if (!skb)
- return;
- header = (void *)skb_push(skb, sizeof(*header));
- memset(header, 0, sizeof *header);
- header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
- header->MessageLength = cpu_to_le32(skb->len);
- header->DataOffset = cpu_to_le32(36);
- header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
-}
-
-void rndis_free_response(int configNr, u8 *buf)
-{
- rndis_resp_t *r;
- struct list_head *act, *tmp;
-
- list_for_each_safe(act, tmp,
- &(rndis_per_dev_params[configNr].resp_queue))
- {
- r = list_entry(act, rndis_resp_t, list);
- if (r && r->buf == buf) {
- list_del(&r->list);
- kfree(r);
- }
- }
-}
-
-u8 *rndis_get_next_response(int configNr, u32 *length)
-{
- rndis_resp_t *r;
- struct list_head *act, *tmp;
-
- if (!length) return NULL;
-
- list_for_each_safe(act, tmp,
- &(rndis_per_dev_params[configNr].resp_queue))
- {
- r = list_entry(act, rndis_resp_t, list);
- if (!r->send) {
- r->send = 1;
- *length = r->length;
- return r->buf;
- }
- }
-
- return NULL;
-}
-
-static rndis_resp_t *rndis_add_response(int configNr, u32 length)
-{
- rndis_resp_t *r;
-
- /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
- r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
- if (!r) return NULL;
-
- r->buf = (u8 *)(r + 1);
- r->length = length;
- r->send = 0;
-
- list_add_tail(&r->list,
- &(rndis_per_dev_params[configNr].resp_queue));
- return r;
-}
-
-int rndis_rm_hdr(struct gether *port,
- struct sk_buff *skb,
- struct sk_buff_head *list)
-{
- /* tmp points to a struct rndis_packet_msg_type */
- __le32 *tmp = (void *)skb->data;
-
- /* MessageType, MessageLength */
- if (cpu_to_le32(RNDIS_MSG_PACKET)
- != get_unaligned(tmp++)) {
- dev_kfree_skb_any(skb);
- return -EINVAL;
- }
- tmp++;
-
- /* DataOffset, DataLength */
- if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
- dev_kfree_skb_any(skb);
- return -EOVERFLOW;
- }
- skb_trim(skb, get_unaligned_le32(tmp++));
-
- skb_queue_tail(list, skb);
- return 0;
-}
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-static int rndis_proc_show(struct seq_file *m, void *v)
-{
- rndis_params *param = m->private;
-
- seq_printf(m,
- "Config Nr. %d\n"
- "used : %s\n"
- "state : %s\n"
- "medium : 0x%08X\n"
- "speed : %d\n"
- "cable : %s\n"
- "vendor ID : 0x%08X\n"
- "vendor : %s\n",
- param->confignr, (param->used) ? "y" : "n",
- ({ char *s = "?";
- switch (param->state) {
- case RNDIS_UNINITIALIZED:
- s = "RNDIS_UNINITIALIZED"; break;
- case RNDIS_INITIALIZED:
- s = "RNDIS_INITIALIZED"; break;
- case RNDIS_DATA_INITIALIZED:
- s = "RNDIS_DATA_INITIALIZED"; break;
- }; s; }),
- param->medium,
- (param->media_state) ? 0 : param->speed*100,
- (param->media_state) ? "disconnected" : "connected",
- param->vendorID, param->vendorDescr);
- return 0;
-}
-
-static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- rndis_params *p = PDE(file_inode(file))->data;
- u32 speed = 0;
- int i, fl_speed = 0;
-
- for (i = 0; i < count; i++) {
- char c;
- if (get_user(c, buffer))
- return -EFAULT;
- switch (c) {
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- fl_speed = 1;
- speed = speed * 10 + c - '0';
- break;
- case 'C':
- case 'c':
- rndis_signal_connect(p->confignr);
- break;
- case 'D':
- case 'd':
- rndis_signal_disconnect(p->confignr);
- break;
- default:
- if (fl_speed) p->speed = speed;
- else pr_debug("%c is not valid\n", c);
- break;
- }
-
- buffer++;
- }
-
- return count;
-}
-
-static int rndis_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, rndis_proc_show, PDE(inode)->data);
-}
-
-static const struct file_operations rndis_proc_fops = {
- .owner = THIS_MODULE,
- .open = rndis_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = rndis_proc_write,
-};
-
-#define NAME_TEMPLATE "driver/rndis-%03d"
-
-static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
-
-#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
-
-
-int rndis_init(void)
-{
- u8 i;
-
- for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- char name [20];
-
- sprintf(name, NAME_TEMPLATE, i);
- rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
- &rndis_proc_fops,
- (void *)(rndis_per_dev_params + i));
- if (!rndis_connect_state[i]) {
- pr_debug("%s: remove entries", __func__);
- while (i) {
- sprintf(name, NAME_TEMPLATE, --i);
- remove_proc_entry(name, NULL);
- }
- pr_debug("\n");
- return -EIO;
- }
-#endif
- rndis_per_dev_params[i].confignr = i;
- rndis_per_dev_params[i].used = 0;
- rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED;
- rndis_per_dev_params[i].media_state
- = RNDIS_MEDIA_STATE_DISCONNECTED;
- INIT_LIST_HEAD(&(rndis_per_dev_params[i].resp_queue));
- }
-
- return 0;
-}
-
-void rndis_exit(void)
-{
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- u8 i;
- char name[20];
-
- for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
- sprintf(name, NAME_TEMPLATE, i);
- remove_proc_entry(name, NULL);
- }
-#endif
-}
+++ /dev/null
-/*
- * RNDIS Definitions for Remote NDIS
- *
- * Authors: Benedikt Spranger, Pengutronix
- * Robert Schwebel, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2, as published by the Free Software Foundation.
- *
- * This software was originally developed in conformance with
- * Microsoft's Remote NDIS Specification License Agreement.
- */
-
-#ifndef _LINUX_RNDIS_H
-#define _LINUX_RNDIS_H
-
-#include <linux/rndis.h>
-#include "ndis.h"
-
-#define RNDIS_MAXIMUM_FRAME_SIZE 1518
-#define RNDIS_MAX_TOTAL_SIZE 1558
-
-typedef struct rndis_init_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 MajorVersion;
- __le32 MinorVersion;
- __le32 MaxTransferSize;
-} rndis_init_msg_type;
-
-typedef struct rndis_init_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
- __le32 MajorVersion;
- __le32 MinorVersion;
- __le32 DeviceFlags;
- __le32 Medium;
- __le32 MaxPacketsPerTransfer;
- __le32 MaxTransferSize;
- __le32 PacketAlignmentFactor;
- __le32 AFListOffset;
- __le32 AFListSize;
-} rndis_init_cmplt_type;
-
-typedef struct rndis_halt_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
-} rndis_halt_msg_type;
-
-typedef struct rndis_query_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 OID;
- __le32 InformationBufferLength;
- __le32 InformationBufferOffset;
- __le32 DeviceVcHandle;
-} rndis_query_msg_type;
-
-typedef struct rndis_query_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
- __le32 InformationBufferLength;
- __le32 InformationBufferOffset;
-} rndis_query_cmplt_type;
-
-typedef struct rndis_set_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 OID;
- __le32 InformationBufferLength;
- __le32 InformationBufferOffset;
- __le32 DeviceVcHandle;
-} rndis_set_msg_type;
-
-typedef struct rndis_set_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
-} rndis_set_cmplt_type;
-
-typedef struct rndis_reset_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 Reserved;
-} rndis_reset_msg_type;
-
-typedef struct rndis_reset_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 Status;
- __le32 AddressingReset;
-} rndis_reset_cmplt_type;
-
-typedef struct rndis_indicate_status_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 Status;
- __le32 StatusBufferLength;
- __le32 StatusBufferOffset;
-} rndis_indicate_status_msg_type;
-
-typedef struct rndis_keepalive_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
-} rndis_keepalive_msg_type;
-
-typedef struct rndis_keepalive_cmplt_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 RequestID;
- __le32 Status;
-} rndis_keepalive_cmplt_type;
-
-struct rndis_packet_msg_type
-{
- __le32 MessageType;
- __le32 MessageLength;
- __le32 DataOffset;
- __le32 DataLength;
- __le32 OOBDataOffset;
- __le32 OOBDataLength;
- __le32 NumOOBDataElements;
- __le32 PerPacketInfoOffset;
- __le32 PerPacketInfoLength;
- __le32 VcHandle;
- __le32 Reserved;
-} __attribute__ ((packed));
-
-struct rndis_config_parameter
-{
- __le32 ParameterNameOffset;
- __le32 ParameterNameLength;
- __le32 ParameterType;
- __le32 ParameterValueOffset;
- __le32 ParameterValueLength;
-};
-
-/* implementation specific */
-enum rndis_state
-{
- RNDIS_UNINITIALIZED,
- RNDIS_INITIALIZED,
- RNDIS_DATA_INITIALIZED,
-};
-
-typedef struct rndis_resp_t
-{
- struct list_head list;
- u8 *buf;
- u32 length;
- int send;
-} rndis_resp_t;
-
-typedef struct rndis_params
-{
- u8 confignr;
- u8 used;
- u16 saved_filter;
- enum rndis_state state;
- u32 medium;
- u32 speed;
- u32 media_state;
-
- const u8 *host_mac;
- u16 *filter;
- struct net_device *dev;
-
- u32 vendorID;
- const char *vendorDescr;
- void (*resp_avail)(void *v);
- void *v;
- struct list_head resp_queue;
-} rndis_params;
-
-/* RNDIS Message parser and other useless functions */
-int rndis_msg_parser (u8 configNr, u8 *buf);
-int rndis_register(void (*resp_avail)(void *v), void *v);
-void rndis_deregister (int configNr);
-int rndis_set_param_dev (u8 configNr, struct net_device *dev,
- u16 *cdc_filter);
-int rndis_set_param_vendor (u8 configNr, u32 vendorID,
- const char *vendorDescr);
-int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
-void rndis_add_hdr (struct sk_buff *skb);
-int rndis_rm_hdr(struct gether *port, struct sk_buff *skb,
- struct sk_buff_head *list);
-u8 *rndis_get_next_response (int configNr, u32 *length);
-void rndis_free_response (int configNr, u8 *buf);
-
-void rndis_uninit (int configNr);
-int rndis_signal_connect (int configNr);
-int rndis_signal_disconnect (int configNr);
-int rndis_state (int configNr);
-extern void rndis_set_host_mac (int configNr, const u8 *addr);
-
-int rndis_init(void);
-void rndis_exit (void);
-
-#endif /* _LINUX_RNDIS_H */
+++ /dev/null
-/*
- * storage_common.c -- Common definitions for mass storage functionality
- *
- * Copyright (C) 2003-2008 Alan Stern
- * Copyeight (C) 2009 Samsung Electronics
- * Author: Michal Nazarewicz (mina86@mina86.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-
-/*
- * This file requires the following identifiers used in USB strings to
- * be defined (each of type pointer to char):
- * - fsg_string_manufacturer -- name of the manufacturer
- * - fsg_string_product -- name of the product
- * - fsg_string_config -- name of the configuration
- * - fsg_string_interface -- name of the interface
- * The first four are only needed when FSG_DESCRIPTORS_DEVICE_STRINGS
- * macro is defined prior to including this file.
- */
-
-/*
- * When FSG_NO_INTR_EP is defined fsg_fs_intr_in_desc and
- * fsg_hs_intr_in_desc objects as well as
- * FSG_FS_FUNCTION_PRE_EP_ENTRIES and FSG_HS_FUNCTION_PRE_EP_ENTRIES
- * macros are not defined.
- *
- * When FSG_NO_DEVICE_STRINGS is defined FSG_STRING_MANUFACTURER,
- * FSG_STRING_PRODUCT, FSG_STRING_SERIAL and FSG_STRING_CONFIG are not
- * defined (as well as corresponding entries in string tables are
- * missing) and FSG_STRING_INTERFACE has value of zero.
- *
- * When FSG_NO_OTG is defined fsg_otg_desc won't be defined.
- */
-
-/*
- * When USB_GADGET_DEBUG_FILES is defined the module param num_buffers
- * sets the number of pipeline buffers (length of the fsg_buffhd array).
- * The valid range of num_buffers is: num >= 2 && num <= 4.
- */
-
-
-#include <linux/usb/storage.h>
-#include <scsi/scsi.h>
-#include <asm/unaligned.h>
-
-
-/*
- * Thanks to NetChip Technologies for donating this product ID.
- *
- * DO NOT REUSE THESE IDs with any other driver!! Ever!!
- * Instead: allocate your own, using normal USB-IF procedures.
- */
-#define FSG_VENDOR_ID 0x0525 /* NetChip */
-#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
-
-
-/*-------------------------------------------------------------------------*/
-
-
-#ifndef DEBUG
-#undef VERBOSE_DEBUG
-#undef DUMP_MSGS
-#endif /* !DEBUG */
-
-#ifdef VERBOSE_DEBUG
-#define VLDBG LDBG
-#else
-#define VLDBG(lun, fmt, args...) do { } while (0)
-#endif /* VERBOSE_DEBUG */
-
-#define LDBG(lun, fmt, args...) dev_dbg (&(lun)->dev, fmt, ## args)
-#define LERROR(lun, fmt, args...) dev_err (&(lun)->dev, fmt, ## args)
-#define LWARN(lun, fmt, args...) dev_warn(&(lun)->dev, fmt, ## args)
-#define LINFO(lun, fmt, args...) dev_info(&(lun)->dev, fmt, ## args)
-
-/*
- * Keep those macros in sync with those in
- * include/linux/usb/composite.h or else GCC will complain. If they
- * are identical (the same names of arguments, white spaces in the
- * same places) GCC will allow redefinition otherwise (even if some
- * white space is removed or added) warning will be issued.
- *
- * Those macros are needed here because File Storage Gadget does not
- * include the composite.h header. For composite gadgets those macros
- * are redundant since composite.h is included any way.
- *
- * One could check whether those macros are already defined (which
- * would indicate composite.h had been included) or not (which would
- * indicate we were in FSG) but this is not done because a warning is
- * desired if definitions here differ from the ones in composite.h.
- *
- * We want the definitions to match and be the same in File Storage
- * Gadget as well as Mass Storage Function (and so composite gadgets
- * using MSF). If someone changes them in composite.h it will produce
- * a warning in this file when building MSF.
- */
-#define DBG(d, fmt, args...) dev_dbg(&(d)->gadget->dev , fmt , ## args)
-#define VDBG(d, fmt, args...) dev_vdbg(&(d)->gadget->dev , fmt , ## args)
-#define ERROR(d, fmt, args...) dev_err(&(d)->gadget->dev , fmt , ## args)
-#define WARNING(d, fmt, args...) dev_warn(&(d)->gadget->dev , fmt , ## args)
-#define INFO(d, fmt, args...) dev_info(&(d)->gadget->dev , fmt , ## args)
-
-
-
-#ifdef DUMP_MSGS
-
-# define dump_msg(fsg, /* const char * */ label, \
- /* const u8 * */ buf, /* unsigned */ length) do { \
- if (length < 512) { \
- DBG(fsg, "%s, length %u:\n", label, length); \
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
- 16, 1, buf, length, 0); \
- } \
-} while (0)
-
-# define dump_cdb(fsg) do { } while (0)
-
-#else
-
-# define dump_msg(fsg, /* const char * */ label, \
- /* const u8 * */ buf, /* unsigned */ length) do { } while (0)
-
-# ifdef VERBOSE_DEBUG
-
-# define dump_cdb(fsg) \
- print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
- 16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
-
-# else
-
-# define dump_cdb(fsg) do { } while (0)
-
-# endif /* VERBOSE_DEBUG */
-
-#endif /* DUMP_MSGS */
-
-/*-------------------------------------------------------------------------*/
-
-/* CBI Interrupt data structure */
-struct interrupt_data {
- u8 bType;
- u8 bValue;
-};
-
-#define CBI_INTERRUPT_DATA_LEN 2
-
-/* CBI Accept Device-Specific Command request */
-#define USB_CBI_ADSC_REQUEST 0x00
-
-
-/* Length of a SCSI Command Data Block */
-#define MAX_COMMAND_SIZE 16
-
-/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
-#define SS_NO_SENSE 0
-#define SS_COMMUNICATION_FAILURE 0x040800
-#define SS_INVALID_COMMAND 0x052000
-#define SS_INVALID_FIELD_IN_CDB 0x052400
-#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
-#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
-#define SS_MEDIUM_NOT_PRESENT 0x023a00
-#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
-#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
-#define SS_RESET_OCCURRED 0x062900
-#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
-#define SS_UNRECOVERED_READ_ERROR 0x031100
-#define SS_WRITE_ERROR 0x030c02
-#define SS_WRITE_PROTECTED 0x072700
-
-#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
-#define ASC(x) ((u8) ((x) >> 8))
-#define ASCQ(x) ((u8) (x))
-
-
-/*-------------------------------------------------------------------------*/
-
-
-struct fsg_lun {
- struct file *filp;
- loff_t file_length;
- loff_t num_sectors;
-
- unsigned int initially_ro:1;
- unsigned int ro:1;
- unsigned int removable:1;
- unsigned int cdrom:1;
- unsigned int prevent_medium_removal:1;
- unsigned int registered:1;
- unsigned int info_valid:1;
- unsigned int nofua:1;
-
- u32 sense_data;
- u32 sense_data_info;
- u32 unit_attention_data;
-
- unsigned int blkbits; /* Bits of logical block size of bound block device */
- unsigned int blksize; /* logical block size of bound block device */
- struct device dev;
-};
-
-#define fsg_lun_is_open(curlun) ((curlun)->filp != NULL)
-
-static struct fsg_lun *fsg_lun_from_dev(struct device *dev)
-{
- return container_of(dev, struct fsg_lun, dev);
-}
-
-
-/* Big enough to hold our biggest descriptor */
-#define EP0_BUFSIZE 256
-#define DELAYED_STATUS (EP0_BUFSIZE + 999) /* An impossibly large value */
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
-module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);
-MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers");
-
-#else
-
-/*
- * Number of buffers we will use.
- * 2 is usually enough for good buffering pipeline
- */
-#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
-
-#endif /* CONFIG_USB_DEBUG */
-
-/* check if fsg_num_buffers is within a valid range */
-static inline int fsg_num_buffers_validate(void)
-{
- if (fsg_num_buffers >= 2 && fsg_num_buffers <= 4)
- return 0;
- pr_err("fsg_num_buffers %u is out of range (%d to %d)\n",
- fsg_num_buffers, 2 ,4);
- return -EINVAL;
-}
-
-/* Default size of buffer length. */
-#define FSG_BUFLEN ((u32)16384)
-
-/* Maximal number of LUNs supported in mass storage function */
-#define FSG_MAX_LUNS 8
-
-enum fsg_buffer_state {
- BUF_STATE_EMPTY = 0,
- BUF_STATE_FULL,
- BUF_STATE_BUSY
-};
-
-struct fsg_buffhd {
- void *buf;
- enum fsg_buffer_state state;
- struct fsg_buffhd *next;
-
- /*
- * The NetChip 2280 is faster, and handles some protocol faults
- * better, if we don't submit any short bulk-out read requests.
- * So we will record the intended request length here.
- */
- unsigned int bulk_out_intended_length;
-
- struct usb_request *inreq;
- int inreq_busy;
- struct usb_request *outreq;
- int outreq_busy;
-};
-
-enum fsg_state {
- /* This one isn't used anywhere */
- FSG_STATE_COMMAND_PHASE = -10,
- FSG_STATE_DATA_PHASE,
- FSG_STATE_STATUS_PHASE,
-
- FSG_STATE_IDLE = 0,
- FSG_STATE_ABORT_BULK_OUT,
- FSG_STATE_RESET,
- FSG_STATE_INTERFACE_CHANGE,
- FSG_STATE_CONFIG_CHANGE,
- FSG_STATE_DISCONNECT,
- FSG_STATE_EXIT,
- FSG_STATE_TERMINATED
-};
-
-enum data_direction {
- DATA_DIR_UNKNOWN = 0,
- DATA_DIR_FROM_HOST,
- DATA_DIR_TO_HOST,
- DATA_DIR_NONE
-};
-
-
-/*-------------------------------------------------------------------------*/
-
-
-static inline u32 get_unaligned_be24(u8 *buf)
-{
- return 0xffffff & (u32) get_unaligned_be32(buf - 1);
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-
-enum {
-#ifndef FSG_NO_DEVICE_STRINGS
- FSG_STRING_MANUFACTURER = 1,
- FSG_STRING_PRODUCT,
- FSG_STRING_SERIAL,
- FSG_STRING_CONFIG,
-#endif
- FSG_STRING_INTERFACE
-};
-
-
-#ifndef FSG_NO_OTG
-static struct usb_otg_descriptor
-fsg_otg_desc = {
- .bLength = sizeof fsg_otg_desc,
- .bDescriptorType = USB_DT_OTG,
-
- .bmAttributes = USB_OTG_SRP,
-};
-#endif
-
-/* There is only one interface. */
-
-static struct usb_interface_descriptor
-fsg_intf_desc = {
- .bLength = sizeof fsg_intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
-
- .bNumEndpoints = 2, /* Adjusted during fsg_bind() */
- .bInterfaceClass = USB_CLASS_MASS_STORAGE,
- .bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
- .bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
- .iInterface = FSG_STRING_INTERFACE,
-};
-
-/*
- * Three full-speed endpoint descriptors: bulk-in, bulk-out, and
- * interrupt-in.
- */
-
-static struct usb_endpoint_descriptor
-fsg_fs_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- /* wMaxPacketSize set by autoconfiguration */
-};
-
-static struct usb_endpoint_descriptor
-fsg_fs_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- /* wMaxPacketSize set by autoconfiguration */
-};
-
-#ifndef FSG_NO_INTR_EP
-
-static struct usb_endpoint_descriptor
-fsg_fs_intr_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(2),
- .bInterval = 32, /* frames -> 32 ms */
-};
-
-#ifndef FSG_NO_OTG
-# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 2
-#else
-# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 1
-#endif
-
-#endif
-
-static struct usb_descriptor_header *fsg_fs_function[] = {
-#ifndef FSG_NO_OTG
- (struct usb_descriptor_header *) &fsg_otg_desc,
-#endif
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
-#ifndef FSG_NO_INTR_EP
- (struct usb_descriptor_header *) &fsg_fs_intr_in_desc,
-#endif
- NULL,
-};
-
-
-/*
- * USB 2.0 devices need to expose both high speed and full speed
- * descriptors, unless they only run at full speed.
- *
- * That means alternate endpoint descriptors (bigger packets)
- * and a "device qualifier" ... plus more construction options
- * for the configuration descriptor.
- */
-static struct usb_endpoint_descriptor
-fsg_hs_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor
-fsg_hs_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512),
- .bInterval = 1, /* NAK every 1 uframe */
-};
-
-#ifndef FSG_NO_INTR_EP
-
-static struct usb_endpoint_descriptor
-fsg_hs_intr_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(2),
- .bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
-};
-
-#ifndef FSG_NO_OTG
-# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 2
-#else
-# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 1
-#endif
-
-#endif
-
-static struct usb_descriptor_header *fsg_hs_function[] = {
-#ifndef FSG_NO_OTG
- (struct usb_descriptor_header *) &fsg_otg_desc,
-#endif
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
-#ifndef FSG_NO_INTR_EP
- (struct usb_descriptor_header *) &fsg_hs_intr_in_desc,
-#endif
- NULL,
-};
-
-static struct usb_endpoint_descriptor
-fsg_ss_bulk_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc = {
- .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /*.bMaxBurst = DYNAMIC, */
-};
-
-static struct usb_endpoint_descriptor
-fsg_ss_bulk_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
- .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- /*.bMaxBurst = DYNAMIC, */
-};
-
-#ifndef FSG_NO_INTR_EP
-
-static struct usb_endpoint_descriptor
-fsg_ss_intr_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- /* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .wMaxPacketSize = cpu_to_le16(2),
- .bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
-};
-
-static struct usb_ss_ep_comp_descriptor fsg_ss_intr_in_comp_desc = {
- .bLength = sizeof(fsg_ss_bulk_in_comp_desc),
- .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
-
- .wBytesPerInterval = cpu_to_le16(2),
-};
-
-#ifndef FSG_NO_OTG
-# define FSG_SS_FUNCTION_PRE_EP_ENTRIES 2
-#else
-# define FSG_SS_FUNCTION_PRE_EP_ENTRIES 1
-#endif
-
-#endif
-
-static __maybe_unused struct usb_ext_cap_descriptor fsg_ext_cap_desc = {
- .bLength = USB_DT_USB_EXT_CAP_SIZE,
- .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
- .bDevCapabilityType = USB_CAP_TYPE_EXT,
-
- .bmAttributes = cpu_to_le32(USB_LPM_SUPPORT),
-};
-
-static __maybe_unused struct usb_ss_cap_descriptor fsg_ss_cap_desc = {
- .bLength = USB_DT_USB_SS_CAP_SIZE,
- .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
- .bDevCapabilityType = USB_SS_CAP_TYPE,
-
- /* .bmAttributes = LTM is not supported yet */
-
- .wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION
- | USB_FULL_SPEED_OPERATION
- | USB_HIGH_SPEED_OPERATION
- | USB_5GBPS_OPERATION),
- .bFunctionalitySupport = USB_LOW_SPEED_OPERATION,
- .bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT,
- .bU2DevExitLat = cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT),
-};
-
-static __maybe_unused struct usb_bos_descriptor fsg_bos_desc = {
- .bLength = USB_DT_BOS_SIZE,
- .bDescriptorType = USB_DT_BOS,
-
- .wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE
- + USB_DT_USB_EXT_CAP_SIZE
- + USB_DT_USB_SS_CAP_SIZE),
-
- .bNumDeviceCaps = 2,
-};
-
-static struct usb_descriptor_header *fsg_ss_function[] = {
-#ifndef FSG_NO_OTG
- (struct usb_descriptor_header *) &fsg_otg_desc,
-#endif
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_in_comp_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_out_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_out_comp_desc,
-#ifndef FSG_NO_INTR_EP
- (struct usb_descriptor_header *) &fsg_ss_intr_in_desc,
- (struct usb_descriptor_header *) &fsg_ss_intr_in_comp_desc,
-#endif
- NULL,
-};
-
-/* Maxpacket and other transfer characteristics vary by speed. */
-static __maybe_unused struct usb_endpoint_descriptor *
-fsg_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
- struct usb_endpoint_descriptor *hs,
- struct usb_endpoint_descriptor *ss)
-{
- if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
- return ss;
- else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
- return hs;
- return fs;
-}
-
-
-/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
-static struct usb_string fsg_strings[] = {
-#ifndef FSG_NO_DEVICE_STRINGS
- {FSG_STRING_MANUFACTURER, fsg_string_manufacturer},
- {FSG_STRING_PRODUCT, fsg_string_product},
- {FSG_STRING_SERIAL, ""},
- {FSG_STRING_CONFIG, fsg_string_config},
-#endif
- {FSG_STRING_INTERFACE, fsg_string_interface},
- {}
-};
-
-static struct usb_gadget_strings fsg_stringtab = {
- .language = 0x0409, /* en-us */
- .strings = fsg_strings,
-};
-
-
- /*-------------------------------------------------------------------------*/
-
-/*
- * If the next two routines are called while the gadget is registered,
- * the caller must own fsg->filesem for writing.
- */
-
-static void fsg_lun_close(struct fsg_lun *curlun)
-{
- if (curlun->filp) {
- LDBG(curlun, "close backing file\n");
- fput(curlun->filp);
- curlun->filp = NULL;
- }
-}
-
-
-static int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
-{
- int ro;
- struct file *filp = NULL;
- int rc = -EINVAL;
- struct inode *inode = NULL;
- loff_t size;
- loff_t num_sectors;
- loff_t min_sectors;
- unsigned int blkbits;
- unsigned int blksize;
-
- /* R/W if we can, R/O if we must */
- ro = curlun->initially_ro;
- if (!ro) {
- filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
- if (PTR_ERR(filp) == -EROFS || PTR_ERR(filp) == -EACCES)
- ro = 1;
- }
- if (ro)
- filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
- if (IS_ERR(filp)) {
- LINFO(curlun, "unable to open backing file: %s\n", filename);
- return PTR_ERR(filp);
- }
-
- if (!(filp->f_mode & FMODE_WRITE))
- ro = 1;
-
- inode = file_inode(filp);
- if ((!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))) {
- LINFO(curlun, "invalid file type: %s\n", filename);
- goto out;
- }
-
- /*
- * If we can't read the file, it's no good.
- * If we can't write the file, use it read-only.
- */
- if (!(filp->f_op->read || filp->f_op->aio_read)) {
- LINFO(curlun, "file not readable: %s\n", filename);
- goto out;
- }
- if (!(filp->f_op->write || filp->f_op->aio_write))
- ro = 1;
-
- size = i_size_read(inode->i_mapping->host);
- if (size < 0) {
- LINFO(curlun, "unable to find file size: %s\n", filename);
- rc = (int) size;
- goto out;
- }
-
- if (curlun->cdrom) {
- blksize = 2048;
- blkbits = 11;
- } else if (inode->i_bdev) {
- blksize = bdev_logical_block_size(inode->i_bdev);
- blkbits = blksize_bits(blksize);
- } else {
- blksize = 512;
- blkbits = 9;
- }
-
- num_sectors = size >> blkbits; /* File size in logic-block-size blocks */
- min_sectors = 1;
- if (curlun->cdrom) {
- min_sectors = 300; /* Smallest track is 300 frames */
- if (num_sectors >= 256*60*75) {
- num_sectors = 256*60*75 - 1;
- LINFO(curlun, "file too big: %s\n", filename);
- LINFO(curlun, "using only first %d blocks\n",
- (int) num_sectors);
- }
- }
- if (num_sectors < min_sectors) {
- LINFO(curlun, "file too small: %s\n", filename);
- rc = -ETOOSMALL;
- goto out;
- }
-
- if (fsg_lun_is_open(curlun))
- fsg_lun_close(curlun);
-
- curlun->blksize = blksize;
- curlun->blkbits = blkbits;
- curlun->ro = ro;
- curlun->filp = filp;
- curlun->file_length = size;
- curlun->num_sectors = num_sectors;
- LDBG(curlun, "open backing file: %s\n", filename);
- return 0;
-
-out:
- fput(filp);
- return rc;
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Sync the file data, don't bother with the metadata.
- * This code was copied from fs/buffer.c:sys_fdatasync().
- */
-static int fsg_lun_fsync_sub(struct fsg_lun *curlun)
-{
- struct file *filp = curlun->filp;
-
- if (curlun->ro || !filp)
- return 0;
- return vfs_fsync(filp, 1);
-}
-
-static void store_cdrom_address(u8 *dest, int msf, u32 addr)
-{
- if (msf) {
- /* Convert to Minutes-Seconds-Frames */
- addr >>= 2; /* Convert to 2048-byte frames */
- addr += 2*75; /* Lead-in occupies 2 seconds */
- dest[3] = addr % 75; /* Frames */
- addr /= 75;
- dest[2] = addr % 60; /* Seconds */
- addr /= 60;
- dest[1] = addr; /* Minutes */
- dest[0] = 0; /* Reserved */
- } else {
- /* Absolute sector */
- put_unaligned_be32(addr, dest);
- }
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-
-static ssize_t fsg_show_ro(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
-
- return sprintf(buf, "%d\n", fsg_lun_is_open(curlun)
- ? curlun->ro
- : curlun->initially_ro);
-}
-
-static ssize_t fsg_show_nofua(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
-
- return sprintf(buf, "%u\n", curlun->nofua);
-}
-
-static ssize_t fsg_show_file(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
- char *p;
- ssize_t rc;
-
- down_read(filesem);
- if (fsg_lun_is_open(curlun)) { /* Get the complete pathname */
- p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
- if (IS_ERR(p))
- rc = PTR_ERR(p);
- else {
- rc = strlen(p);
- memmove(buf, p, rc);
- buf[rc] = '\n'; /* Add a newline */
- buf[++rc] = 0;
- }
- } else { /* No file, return 0 bytes */
- *buf = 0;
- rc = 0;
- }
- up_read(filesem);
- return rc;
-}
-
-
-static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- ssize_t rc;
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
- unsigned ro;
-
- rc = kstrtouint(buf, 2, &ro);
- if (rc)
- return rc;
-
- /*
- * Allow the write-enable status to change only while the
- * backing file is closed.
- */
- down_read(filesem);
- if (fsg_lun_is_open(curlun)) {
- LDBG(curlun, "read-only status change prevented\n");
- rc = -EBUSY;
- } else {
- curlun->ro = ro;
- curlun->initially_ro = ro;
- LDBG(curlun, "read-only status set to %d\n", curlun->ro);
- rc = count;
- }
- up_read(filesem);
- return rc;
-}
-
-static ssize_t fsg_store_nofua(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- unsigned nofua;
- int ret;
-
- ret = kstrtouint(buf, 2, &nofua);
- if (ret)
- return ret;
-
- /* Sync data when switching from async mode to sync */
- if (!nofua && curlun->nofua)
- fsg_lun_fsync_sub(curlun);
-
- curlun->nofua = nofua;
-
- return count;
-}
-
-static ssize_t fsg_store_file(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct fsg_lun *curlun = fsg_lun_from_dev(dev);
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
- int rc = 0;
-
- if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {
- LDBG(curlun, "eject attempt prevented\n");
- return -EBUSY; /* "Door is locked" */
- }
-
- /* Remove a trailing newline */
- if (count > 0 && buf[count-1] == '\n')
- ((char *) buf)[count-1] = 0; /* Ugh! */
-
- /* Load new medium */
- down_write(filesem);
- if (count > 0 && buf[0]) {
- /* fsg_lun_open() will close existing file if any. */
- rc = fsg_lun_open(curlun, buf);
- if (rc == 0)
- curlun->unit_attention_data =
- SS_NOT_READY_TO_READY_TRANSITION;
- } else if (fsg_lun_is_open(curlun)) {
- fsg_lun_close(curlun);
- curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
- }
- up_write(filesem);
- return (rc < 0 ? rc : count);
-}
+++ /dev/null
-What: /sys/class/ccg_usb
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The ccg_usb/ class subdirectory belongs to ccg
- USB gadget.
-
-What: /sys/class/ccg_usb/ccgX
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccg{0,1,2,3...} class
- subdirectories correspond to each ccg gadget device;
- at the time of this writing there is only ccg0 and it
- represents the ccg gadget.
-
-What: /sys/class/ccg_usb/ccgX/functions
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- A comma-separated list of USB function names to be activated
- in this ccg gadget. It includes both the functions provided
- in-kernel by the ccg gadget and the functions provided from
- userspace through FunctionFS.
-
-What: /sys/class/ccg_usb/ccgX/enable
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- A flag activating/deactivating the ccg usb gadget.
-
-What: /sys/class/ccg_usb/ccgX/state
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- Configurable usb gadget state:
-
- DISCONNECTED
- CONNECTED
- CONFIGURED
-
-What: /sys/class/ccg_usb/ccgX/f_acm/
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccgX/f_acm subdirectory
- corresponds to the gadget's USB CDC serial (ACM) function
- driver.
-
-What: /sys/class/ccg_usb/ccgX/f_acm/instances
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- Maximum number of the /dev/ttyGS<X> interface the driver uses.
-
-What: /sys/class/ccg_usb/ccgX/f_fs
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccgX/f_fs subdirectory
- corresponds to the gadget's FunctionFS driver.
-
-What: /sys/class/ccg_usb/ccgX/f_fs/user_functions
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- A comma-separeted list of USB function names to be supported
- from userspace. No other userspace FunctionFS functions can
- be supported than listed here. However, the actual activation
- of these functions is still done through
- /sys/class/ccg_usb/ccgX/functions, where it is possible
- to specify any subset (including maximum and empty) of
- /sys/class/ccg_usb/ccgX/f_fs/user_functions.
-
-What: /sys/class/ccg_usb/ccgX/f_fs/max_user_functions
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- Maximum number of USB functions to be supported from userspace.
-
-What: /sys/class/ccg_usb/ccgX/f_rndis
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccgX/f_rndis subdirectory
- corresponds to the gadget's RNDIS driver.
-
-What: /sys/class/ccg_usb/ccgX/f_rndis/manufacturer
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- RNDIS Ethernet port manufacturer string.
-
-What: /sys/class/ccg_usb/ccgX/f_rndis/wceis
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- RNDIS Ethernet port wireless flag.
-
-What: /sys/class/ccg_usb/ccgX/f_rndis/ethaddr
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- RNDIS Ethernet port Ethernet address.
-
-What: /sys/class/ccg_usb/ccgX/f_rndis/vendorID
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- RNDIS Ethernet port vendor ID.
-
-What: /sys/class/ccg_usb/ccgX/f_mass_storage
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccgX/f_mass_storage subdirectory
- corresponds to the gadget's USB mass storage driver.
-
-What: /sys/class/ccg_usb/ccgX/f_mass_storage/lun
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccgX/f_mass_storage/lun
- subdirectory corresponds to the gadget's USB mass storage
- driver and its underlying storage.
-
-What: /sys/class/ccg_usb/ccgX/f_mass_storage/lun
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- The /sys/class/ccg_usb/ccgX/f_mass_storage/lun
- subdirectory corresponds to the gadget's USB mass storage
- driver and its underlying storage.
-
-What: /sys/class/ccg_usb/ccgX/f_mass_storage/lun/file
-Date: May 2012
-KernelVersion: 3.4
-Contact: linux-usb@vger.kernel.org
-Description:
- Gadget's USB mass storage underlying file.
+++ /dev/null
-/*
- * u_ether.c -- Ethernet-over-USB link layer utilities for Gadget stack
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/device.h>
-#include <linux/ctype.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-
-#include "u_ether.h"
-
-
-/*
- * This component encapsulates the Ethernet link glue needed to provide
- * one (!) network link through the USB gadget stack, normally "usb0".
- *
- * The control and data models are handled by the function driver which
- * connects to this code; such as CDC Ethernet (ECM or EEM),
- * "CDC Subset", or RNDIS. That includes all descriptor and endpoint
- * management.
- *
- * Link level addressing is handled by this component using module
- * parameters; if no such parameters are provided, random link level
- * addresses are used. Each end of the link uses one address. The
- * host end address is exported in various ways, and is often recorded
- * in configuration databases.
- *
- * The driver which assembles each configuration using such a link is
- * responsible for ensuring that each configuration includes at most one
- * instance of is network link. (The network layer provides ways for
- * this single "physical" link to be used by multiple virtual links.)
- */
-
-#define UETH__VERSION "29-May-2008"
-
-struct eth_dev {
- /* lock is held while accessing port_usb
- * or updating its backlink port_usb->ioport
- */
- spinlock_t lock;
- struct gether *port_usb;
-
- struct net_device *net;
- struct usb_gadget *gadget;
-
- spinlock_t req_lock; /* guard {rx,tx}_reqs */
- struct list_head tx_reqs, rx_reqs;
- atomic_t tx_qlen;
-
- struct sk_buff_head rx_frames;
-
- unsigned header_len;
- struct sk_buff *(*wrap)(struct gether *, struct sk_buff *skb);
- int (*unwrap)(struct gether *,
- struct sk_buff *skb,
- struct sk_buff_head *list);
-
- struct work_struct work;
-
- unsigned long todo;
-#define WORK_RX_MEMORY 0
-
- bool zlp;
- u8 host_mac[ETH_ALEN];
-};
-
-/*-------------------------------------------------------------------------*/
-
-#define RX_EXTRA 20 /* bytes guarding against rx overflows */
-
-#define DEFAULT_QLEN 2 /* double buffering by default */
-
-static unsigned qmult = 5;
-module_param(qmult, uint, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(qmult, "queue length multiplier at high/super speed");
-
-/* for dual-speed hardware, use deeper queues at high/super speed */
-static inline int qlen(struct usb_gadget *gadget)
-{
- if (gadget_is_dualspeed(gadget) && (gadget->speed == USB_SPEED_HIGH ||
- gadget->speed == USB_SPEED_SUPER))
- return qmult * DEFAULT_QLEN;
- else
- return DEFAULT_QLEN;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* REVISIT there must be a better way than having two sets
- * of debug calls ...
- */
-
-#undef DBG
-#undef VDBG
-#undef ERROR
-#undef INFO
-
-#define xprintk(d, level, fmt, args...) \
- printk(level "%s: " fmt , (d)->net->name , ## args)
-
-#ifdef DEBUG
-#undef DEBUG
-#define DBG(dev, fmt, args...) \
- xprintk(dev , KERN_DEBUG , fmt , ## args)
-#else
-#define DBG(dev, fmt, args...) \
- do { } while (0)
-#endif /* DEBUG */
-
-#ifdef VERBOSE_DEBUG
-#define VDBG DBG
-#else
-#define VDBG(dev, fmt, args...) \
- do { } while (0)
-#endif /* DEBUG */
-
-#define ERROR(dev, fmt, args...) \
- xprintk(dev , KERN_ERR , fmt , ## args)
-#define INFO(dev, fmt, args...) \
- xprintk(dev , KERN_INFO , fmt , ## args)
-
-/*-------------------------------------------------------------------------*/
-
-/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
-
-static int ueth_change_mtu(struct net_device *net, int new_mtu)
-{
- struct eth_dev *dev = netdev_priv(net);
- unsigned long flags;
- int status = 0;
-
- /* don't change MTU on "live" link (peer won't know) */
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb)
- status = -EBUSY;
- else if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
- status = -ERANGE;
- else
- net->mtu = new_mtu;
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return status;
-}
-
-static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
-{
- struct eth_dev *dev = netdev_priv(net);
-
- strlcpy(p->driver, "g_ether", sizeof(p->driver));
- strlcpy(p->version, UETH__VERSION, sizeof(p->version));
- strlcpy(p->fw_version, dev->gadget->name, sizeof(p->fw_version));
- strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof(p->bus_info));
-}
-
-/* REVISIT can also support:
- * - WOL (by tracking suspends and issuing remote wakeup)
- * - msglevel (implies updated messaging)
- * - ... probably more ethtool ops
- */
-
-static const struct ethtool_ops ops = {
- .get_drvinfo = eth_get_drvinfo,
- .get_link = ethtool_op_get_link,
-};
-
-static void defer_kevent(struct eth_dev *dev, int flag)
-{
- if (test_and_set_bit(flag, &dev->todo))
- return;
- if (!schedule_work(&dev->work))
- ERROR(dev, "kevent %d may have been dropped\n", flag);
- else
- DBG(dev, "kevent %d scheduled\n", flag);
-}
-
-static void rx_complete(struct usb_ep *ep, struct usb_request *req);
-
-static int
-rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
-{
- struct sk_buff *skb;
- int retval = -ENOMEM;
- size_t size = 0;
- struct usb_ep *out;
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb)
- out = dev->port_usb->out_ep;
- else
- out = NULL;
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (!out)
- return -ENOTCONN;
-
-
- /* Padding up to RX_EXTRA handles minor disagreements with host.
- * Normally we use the USB "terminate on short read" convention;
- * so allow up to (N*maxpacket), since that memory is normally
- * already allocated. Some hardware doesn't deal well with short
- * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
- * byte off the end (to force hardware errors on overflow).
- *
- * RNDIS uses internal framing, and explicitly allows senders to
- * pad to end-of-packet. That's potentially nice for speed, but
- * means receivers can't recover lost synch on their own (because
- * new packets don't only start after a short RX).
- */
- size += sizeof(struct ethhdr) + dev->net->mtu + RX_EXTRA;
- size += dev->port_usb->header_len;
- size += out->maxpacket - 1;
- size -= size % out->maxpacket;
-
- if (dev->port_usb->is_fixed)
- size = max_t(size_t, size, dev->port_usb->fixed_out_len);
-
- skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
- if (skb == NULL) {
- DBG(dev, "no rx skb\n");
- goto enomem;
- }
-
- /* Some platforms perform better when IP packets are aligned,
- * but on at least one, checksumming fails otherwise. Note:
- * RNDIS headers involve variable numbers of LE32 values.
- */
- skb_reserve(skb, NET_IP_ALIGN);
-
- req->buf = skb->data;
- req->length = size;
- req->complete = rx_complete;
- req->context = skb;
-
- retval = usb_ep_queue(out, req, gfp_flags);
- if (retval == -ENOMEM)
-enomem:
- defer_kevent(dev, WORK_RX_MEMORY);
- if (retval) {
- DBG(dev, "rx submit --> %d\n", retval);
- if (skb)
- dev_kfree_skb_any(skb);
- spin_lock_irqsave(&dev->req_lock, flags);
- list_add(&req->list, &dev->rx_reqs);
- spin_unlock_irqrestore(&dev->req_lock, flags);
- }
- return retval;
-}
-
-static void rx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = req->context, *skb2;
- struct eth_dev *dev = ep->driver_data;
- int status = req->status;
-
- switch (status) {
-
- /* normal completion */
- case 0:
- skb_put(skb, req->actual);
-
- if (dev->unwrap) {
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb) {
- status = dev->unwrap(dev->port_usb,
- skb,
- &dev->rx_frames);
- } else {
- dev_kfree_skb_any(skb);
- status = -ENOTCONN;
- }
- spin_unlock_irqrestore(&dev->lock, flags);
- } else {
- skb_queue_tail(&dev->rx_frames, skb);
- }
- skb = NULL;
-
- skb2 = skb_dequeue(&dev->rx_frames);
- while (skb2) {
- if (status < 0
- || ETH_HLEN > skb2->len
- || skb2->len > ETH_FRAME_LEN) {
- dev->net->stats.rx_errors++;
- dev->net->stats.rx_length_errors++;
- DBG(dev, "rx length %d\n", skb2->len);
- dev_kfree_skb_any(skb2);
- goto next_frame;
- }
- skb2->protocol = eth_type_trans(skb2, dev->net);
- dev->net->stats.rx_packets++;
- dev->net->stats.rx_bytes += skb2->len;
-
- /* no buffer copies needed, unless hardware can't
- * use skb buffers.
- */
- status = netif_rx(skb2);
-next_frame:
- skb2 = skb_dequeue(&dev->rx_frames);
- }
- break;
-
- /* software-driven interface shutdown */
- case -ECONNRESET: /* unlink */
- case -ESHUTDOWN: /* disconnect etc */
- VDBG(dev, "rx shutdown, code %d\n", status);
- goto quiesce;
-
- /* for hardware automagic (such as pxa) */
- case -ECONNABORTED: /* endpoint reset */
- DBG(dev, "rx %s reset\n", ep->name);
- defer_kevent(dev, WORK_RX_MEMORY);
-quiesce:
- dev_kfree_skb_any(skb);
- goto clean;
-
- /* data overrun */
- case -EOVERFLOW:
- dev->net->stats.rx_over_errors++;
- /* FALLTHROUGH */
-
- default:
- dev->net->stats.rx_errors++;
- DBG(dev, "rx status %d\n", status);
- break;
- }
-
- if (skb)
- dev_kfree_skb_any(skb);
- if (!netif_running(dev->net)) {
-clean:
- spin_lock(&dev->req_lock);
- list_add(&req->list, &dev->rx_reqs);
- spin_unlock(&dev->req_lock);
- req = NULL;
- }
- if (req)
- rx_submit(dev, req, GFP_ATOMIC);
-}
-
-static int prealloc(struct list_head *list, struct usb_ep *ep, unsigned n)
-{
- unsigned i;
- struct usb_request *req;
-
- if (!n)
- return -ENOMEM;
-
- /* queue/recycle up to N requests */
- i = n;
- list_for_each_entry(req, list, list) {
- if (i-- == 0)
- goto extra;
- }
- while (i--) {
- req = usb_ep_alloc_request(ep, GFP_ATOMIC);
- if (!req)
- return list_empty(list) ? -ENOMEM : 0;
- list_add(&req->list, list);
- }
- return 0;
-
-extra:
- /* free extras */
- for (;;) {
- struct list_head *next;
-
- next = req->list.next;
- list_del(&req->list);
- usb_ep_free_request(ep, req);
-
- if (next == list)
- break;
-
- req = container_of(next, struct usb_request, list);
- }
- return 0;
-}
-
-static int alloc_requests(struct eth_dev *dev, struct gether *link, unsigned n)
-{
- int status;
-
- spin_lock(&dev->req_lock);
- status = prealloc(&dev->tx_reqs, link->in_ep, n);
- if (status < 0)
- goto fail;
- status = prealloc(&dev->rx_reqs, link->out_ep, n);
- if (status < 0)
- goto fail;
- goto done;
-fail:
- DBG(dev, "can't alloc requests\n");
-done:
- spin_unlock(&dev->req_lock);
- return status;
-}
-
-static void rx_fill(struct eth_dev *dev, gfp_t gfp_flags)
-{
- struct usb_request *req;
- unsigned long flags;
-
- /* fill unused rxq slots with some skb */
- spin_lock_irqsave(&dev->req_lock, flags);
- while (!list_empty(&dev->rx_reqs)) {
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del_init(&req->list);
- spin_unlock_irqrestore(&dev->req_lock, flags);
-
- if (rx_submit(dev, req, gfp_flags) < 0) {
- defer_kevent(dev, WORK_RX_MEMORY);
- return;
- }
-
- spin_lock_irqsave(&dev->req_lock, flags);
- }
- spin_unlock_irqrestore(&dev->req_lock, flags);
-}
-
-static void eth_work(struct work_struct *work)
-{
- struct eth_dev *dev = container_of(work, struct eth_dev, work);
-
- if (test_and_clear_bit(WORK_RX_MEMORY, &dev->todo)) {
- if (netif_running(dev->net))
- rx_fill(dev, GFP_KERNEL);
- }
-
- if (dev->todo)
- DBG(dev, "work done, flags = 0x%lx\n", dev->todo);
-}
-
-static void tx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct sk_buff *skb = req->context;
- struct eth_dev *dev = ep->driver_data;
-
- switch (req->status) {
- default:
- dev->net->stats.tx_errors++;
- VDBG(dev, "tx err %d\n", req->status);
- /* FALLTHROUGH */
- case -ECONNRESET: /* unlink */
- case -ESHUTDOWN: /* disconnect etc */
- break;
- case 0:
- dev->net->stats.tx_bytes += skb->len;
- }
- dev->net->stats.tx_packets++;
-
- spin_lock(&dev->req_lock);
- list_add(&req->list, &dev->tx_reqs);
- spin_unlock(&dev->req_lock);
- dev_kfree_skb_any(skb);
-
- atomic_dec(&dev->tx_qlen);
- if (netif_carrier_ok(dev->net))
- netif_wake_queue(dev->net);
-}
-
-static inline int is_promisc(u16 cdc_filter)
-{
- return cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
-}
-
-static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
- struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- int length = skb->len;
- int retval;
- struct usb_request *req = NULL;
- unsigned long flags;
- struct usb_ep *in;
- u16 cdc_filter;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb) {
- in = dev->port_usb->in_ep;
- cdc_filter = dev->port_usb->cdc_filter;
- } else {
- in = NULL;
- cdc_filter = 0;
- }
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (!in) {
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
- }
-
- /* apply outgoing CDC or RNDIS filters */
- if (!is_promisc(cdc_filter)) {
- u8 *dest = skb->data;
-
- if (is_multicast_ether_addr(dest)) {
- u16 type;
-
- /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
- * SET_ETHERNET_MULTICAST_FILTERS requests
- */
- if (is_broadcast_ether_addr(dest))
- type = USB_CDC_PACKET_TYPE_BROADCAST;
- else
- type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
- if (!(cdc_filter & type)) {
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
- }
- }
- /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
- }
-
- spin_lock_irqsave(&dev->req_lock, flags);
- /*
- * this freelist can be empty if an interrupt triggered disconnect()
- * and reconfigured the gadget (shutting down this queue) after the
- * network stack decided to xmit but before we got the spinlock.
- */
- if (list_empty(&dev->tx_reqs)) {
- spin_unlock_irqrestore(&dev->req_lock, flags);
- return NETDEV_TX_BUSY;
- }
-
- req = container_of(dev->tx_reqs.next, struct usb_request, list);
- list_del(&req->list);
-
- /* temporarily stop TX queue when the freelist empties */
- if (list_empty(&dev->tx_reqs))
- netif_stop_queue(net);
- spin_unlock_irqrestore(&dev->req_lock, flags);
-
- /* no buffer copies needed, unless the network stack did it
- * or the hardware can't use skb buffers.
- * or there's not enough space for extra headers we need
- */
- if (dev->wrap) {
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb)
- skb = dev->wrap(dev->port_usb, skb);
- spin_unlock_irqrestore(&dev->lock, flags);
- if (!skb)
- goto drop;
-
- length = skb->len;
- }
- req->buf = skb->data;
- req->context = skb;
- req->complete = tx_complete;
-
- /* NCM requires no zlp if transfer is dwNtbInMaxSize */
- if (dev->port_usb->is_fixed &&
- length == dev->port_usb->fixed_in_len &&
- (length % in->maxpacket) == 0)
- req->zero = 0;
- else
- req->zero = 1;
-
- /* use zlp framing on tx for strict CDC-Ether conformance,
- * though any robust network rx path ignores extra padding.
- * and some hardware doesn't like to write zlps.
- */
- if (req->zero && !dev->zlp && (length % in->maxpacket) == 0)
- length++;
-
- req->length = length;
-
- /* throttle high/super speed IRQ rate back slightly */
- if (gadget_is_dualspeed(dev->gadget))
- req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH ||
- dev->gadget->speed == USB_SPEED_SUPER)
- ? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
- : 0;
-
- retval = usb_ep_queue(in, req, GFP_ATOMIC);
- switch (retval) {
- default:
- DBG(dev, "tx queue err %d\n", retval);
- break;
- case 0:
- net->trans_start = jiffies;
- atomic_inc(&dev->tx_qlen);
- }
-
- if (retval) {
- dev_kfree_skb_any(skb);
-drop:
- dev->net->stats.tx_dropped++;
- spin_lock_irqsave(&dev->req_lock, flags);
- if (list_empty(&dev->tx_reqs))
- netif_start_queue(net);
- list_add(&req->list, &dev->tx_reqs);
- spin_unlock_irqrestore(&dev->req_lock, flags);
- }
- return NETDEV_TX_OK;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
-{
- DBG(dev, "%s\n", __func__);
-
- /* fill the rx queue */
- rx_fill(dev, gfp_flags);
-
- /* and open the tx floodgates */
- atomic_set(&dev->tx_qlen, 0);
- netif_wake_queue(dev->net);
-}
-
-static int eth_open(struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- struct gether *link;
-
- DBG(dev, "%s\n", __func__);
- if (netif_carrier_ok(dev->net))
- eth_start(dev, GFP_KERNEL);
-
- spin_lock_irq(&dev->lock);
- link = dev->port_usb;
- if (link && link->open)
- link->open(link);
- spin_unlock_irq(&dev->lock);
-
- return 0;
-}
-
-static int eth_stop(struct net_device *net)
-{
- struct eth_dev *dev = netdev_priv(net);
- unsigned long flags;
-
- VDBG(dev, "%s\n", __func__);
- netif_stop_queue(net);
-
- DBG(dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
- dev->net->stats.rx_packets, dev->net->stats.tx_packets,
- dev->net->stats.rx_errors, dev->net->stats.tx_errors
- );
-
- /* ensure there are no more active requests */
- spin_lock_irqsave(&dev->lock, flags);
- if (dev->port_usb) {
- struct gether *link = dev->port_usb;
-
- if (link->close)
- link->close(link);
-
- /* NOTE: we have no abort-queue primitive we could use
- * to cancel all pending I/O. Instead, we disable then
- * reenable the endpoints ... this idiom may leave toggle
- * wrong, but that's a self-correcting error.
- *
- * REVISIT: we *COULD* just let the transfers complete at
- * their own pace; the network stack can handle old packets.
- * For the moment we leave this here, since it works.
- */
- usb_ep_disable(link->in_ep);
- usb_ep_disable(link->out_ep);
- if (netif_carrier_ok(net)) {
- DBG(dev, "host still using in/out endpoints\n");
- usb_ep_enable(link->in_ep);
- usb_ep_enable(link->out_ep);
- }
- }
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
-static char *dev_addr;
-module_param(dev_addr, charp, S_IRUGO);
-MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
-
-/* this address is invisible to ifconfig */
-static char *host_addr;
-module_param(host_addr, charp, S_IRUGO);
-MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
-
-static int get_ether_addr(const char *str, u8 *dev_addr)
-{
- if (str) {
- unsigned i;
-
- for (i = 0; i < 6; i++) {
- unsigned char num;
-
- if ((*str == '.') || (*str == ':'))
- str++;
- num = hex_to_bin(*str++) << 4;
- num |= hex_to_bin(*str++);
- dev_addr [i] = num;
- }
- if (is_valid_ether_addr(dev_addr))
- return 0;
- }
- eth_random_addr(dev_addr);
- return 1;
-}
-
-static struct eth_dev *the_dev;
-
-static const struct net_device_ops eth_netdev_ops = {
- .ndo_open = eth_open,
- .ndo_stop = eth_stop,
- .ndo_start_xmit = eth_start_xmit,
- .ndo_change_mtu = ueth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static struct device_type gadget_type = {
- .name = "gadget",
-};
-
-/**
- * gether_setup_name - initialize one ethernet-over-usb link
- * @g: gadget to associated with these links
- * @ethaddr: NULL, or a buffer in which the ethernet address of the
- * host side of the link is recorded
- * @netname: name for network device (for example, "usb")
- * Context: may sleep
- *
- * This sets up the single network link that may be exported by a
- * gadget driver using this framework. The link layer addresses are
- * set up using module parameters.
- *
- * Returns negative errno, or zero on success
- */
-int gether_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
- const char *netname)
-{
- struct eth_dev *dev;
- struct net_device *net;
- int status;
-
- if (the_dev)
- return -EBUSY;
-
- net = alloc_etherdev(sizeof *dev);
- if (!net)
- return -ENOMEM;
-
- dev = netdev_priv(net);
- spin_lock_init(&dev->lock);
- spin_lock_init(&dev->req_lock);
- INIT_WORK(&dev->work, eth_work);
- INIT_LIST_HEAD(&dev->tx_reqs);
- INIT_LIST_HEAD(&dev->rx_reqs);
-
- skb_queue_head_init(&dev->rx_frames);
-
- /* network device setup */
- dev->net = net;
- snprintf(net->name, sizeof(net->name), "%s%%d", netname);
-
- if (get_ether_addr(dev_addr, net->dev_addr))
- dev_warn(&g->dev,
- "using random %s ethernet address\n", "self");
- if (get_ether_addr(host_addr, dev->host_mac))
- dev_warn(&g->dev,
- "using random %s ethernet address\n", "host");
-
- if (ethaddr)
- memcpy(ethaddr, dev->host_mac, ETH_ALEN);
-
- net->netdev_ops = ð_netdev_ops;
-
- SET_ETHTOOL_OPS(net, &ops);
-
- dev->gadget = g;
- SET_NETDEV_DEV(net, &g->dev);
- SET_NETDEV_DEVTYPE(net, &gadget_type);
-
- status = register_netdev(net);
- if (status < 0) {
- dev_dbg(&g->dev, "register_netdev failed, %d\n", status);
- free_netdev(net);
- } else {
- INFO(dev, "MAC %pM\n", net->dev_addr);
- INFO(dev, "HOST MAC %pM\n", dev->host_mac);
-
- the_dev = dev;
-
- /* two kinds of host-initiated state changes:
- * - iff DATA transfer is active, carrier is "on"
- * - tx queueing enabled if open *and* carrier is "on"
- */
- netif_carrier_off(net);
- }
-
- return status;
-}
-
-/**
- * gether_cleanup - remove Ethernet-over-USB device
- * Context: may sleep
- *
- * This is called to free all resources allocated by @gether_setup().
- */
-void gether_cleanup(void)
-{
- if (!the_dev)
- return;
-
- unregister_netdev(the_dev->net);
- flush_work(&the_dev->work);
- free_netdev(the_dev->net);
-
- the_dev = NULL;
-}
-
-
-/**
- * gether_connect - notify network layer that USB link is active
- * @link: the USB link, set up with endpoints, descriptors matching
- * current device speed, and any framing wrapper(s) set up.
- * Context: irqs blocked
- *
- * This is called to activate endpoints and let the network layer know
- * the connection is active ("carrier detect"). It may cause the I/O
- * queues to open and start letting network packets flow, but will in
- * any case activate the endpoints so that they respond properly to the
- * USB host.
- *
- * Verify net_device pointer returned using IS_ERR(). If it doesn't
- * indicate some error code (negative errno), ep->driver_data values
- * have been overwritten.
- */
-struct net_device *gether_connect(struct gether *link)
-{
- struct eth_dev *dev = the_dev;
- int result = 0;
-
- if (!dev)
- return ERR_PTR(-EINVAL);
-
- link->in_ep->driver_data = dev;
- result = usb_ep_enable(link->in_ep);
- if (result != 0) {
- DBG(dev, "enable %s --> %d\n",
- link->in_ep->name, result);
- goto fail0;
- }
-
- link->out_ep->driver_data = dev;
- result = usb_ep_enable(link->out_ep);
- if (result != 0) {
- DBG(dev, "enable %s --> %d\n",
- link->out_ep->name, result);
- goto fail1;
- }
-
- if (result == 0)
- result = alloc_requests(dev, link, qlen(dev->gadget));
-
- if (result == 0) {
- dev->zlp = link->is_zlp_ok;
- DBG(dev, "qlen %d\n", qlen(dev->gadget));
-
- dev->header_len = link->header_len;
- dev->unwrap = link->unwrap;
- dev->wrap = link->wrap;
-
- spin_lock(&dev->lock);
- dev->port_usb = link;
- link->ioport = dev;
- if (netif_running(dev->net)) {
- if (link->open)
- link->open(link);
- } else {
- if (link->close)
- link->close(link);
- }
- spin_unlock(&dev->lock);
-
- netif_carrier_on(dev->net);
- if (netif_running(dev->net))
- eth_start(dev, GFP_ATOMIC);
-
- /* on error, disable any endpoints */
- } else {
- (void) usb_ep_disable(link->out_ep);
-fail1:
- (void) usb_ep_disable(link->in_ep);
- }
-fail0:
- /* caller is responsible for cleanup on error */
- if (result < 0)
- return ERR_PTR(result);
- return dev->net;
-}
-
-/**
- * gether_disconnect - notify network layer that USB link is inactive
- * @link: the USB link, on which gether_connect() was called
- * Context: irqs blocked
- *
- * This is called to deactivate endpoints and let the network layer know
- * the connection went inactive ("no carrier").
- *
- * On return, the state is as if gether_connect() had never been called.
- * The endpoints are inactive, and accordingly without active USB I/O.
- * Pointers to endpoint descriptors and endpoint private data are nulled.
- */
-void gether_disconnect(struct gether *link)
-{
- struct eth_dev *dev = link->ioport;
- struct usb_request *req;
-
- WARN_ON(!dev);
- if (!dev)
- return;
-
- DBG(dev, "%s\n", __func__);
-
- netif_stop_queue(dev->net);
- netif_carrier_off(dev->net);
-
- /* disable endpoints, forcing (synchronous) completion
- * of all pending i/o. then free the request objects
- * and forget about the endpoints.
- */
- usb_ep_disable(link->in_ep);
- spin_lock(&dev->req_lock);
- while (!list_empty(&dev->tx_reqs)) {
- req = container_of(dev->tx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
-
- spin_unlock(&dev->req_lock);
- usb_ep_free_request(link->in_ep, req);
- spin_lock(&dev->req_lock);
- }
- spin_unlock(&dev->req_lock);
- link->in_ep->driver_data = NULL;
- link->in_ep->desc = NULL;
-
- usb_ep_disable(link->out_ep);
- spin_lock(&dev->req_lock);
- while (!list_empty(&dev->rx_reqs)) {
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
-
- spin_unlock(&dev->req_lock);
- usb_ep_free_request(link->out_ep, req);
- spin_lock(&dev->req_lock);
- }
- spin_unlock(&dev->req_lock);
- link->out_ep->driver_data = NULL;
- link->out_ep->desc = NULL;
-
- /* finish forgetting about this USB link episode */
- dev->header_len = 0;
- dev->unwrap = NULL;
- dev->wrap = NULL;
-
- spin_lock(&dev->lock);
- dev->port_usb = NULL;
- link->ioport = NULL;
- spin_unlock(&dev->lock);
-}
+++ /dev/null
-/*
- * u_ether.h -- interface to USB gadget "ethernet link" utilities
- *
- * Copyright (C) 2003-2005,2008 David Brownell
- * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
- * Copyright (C) 2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __U_ETHER_H
-#define __U_ETHER_H
-
-#include <linux/err.h>
-#include <linux/if_ether.h>
-#include <linux/usb/composite.h>
-#include <linux/usb/cdc.h>
-
-#include "gadget_chips.h"
-
-
-/*
- * This represents the USB side of an "ethernet" link, managed by a USB
- * function which provides control and (maybe) framing. Two functions
- * in different configurations could share the same ethernet link/netdev,
- * using different host interaction models.
- *
- * There is a current limitation that only one instance of this link may
- * be present in any given configuration. When that's a problem, network
- * layer facilities can be used to package multiple logical links on this
- * single "physical" one.
- */
-struct gether {
- struct usb_function func;
-
- /* updated by gether_{connect,disconnect} */
- struct eth_dev *ioport;
-
- /* endpoints handle full and/or high speeds */
- struct usb_ep *in_ep;
- struct usb_ep *out_ep;
-
- bool is_zlp_ok;
-
- u16 cdc_filter;
-
- /* hooks for added framing, as needed for RNDIS and EEM. */
- u32 header_len;
- /* NCM requires fixed size bundles */
- bool is_fixed;
- u32 fixed_out_len;
- u32 fixed_in_len;
- struct sk_buff *(*wrap)(struct gether *port,
- struct sk_buff *skb);
- int (*unwrap)(struct gether *port,
- struct sk_buff *skb,
- struct sk_buff_head *list);
-
- /* called on network open/close */
- void (*open)(struct gether *);
- void (*close)(struct gether *);
-};
-
-#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
- |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
- |USB_CDC_PACKET_TYPE_PROMISCUOUS \
- |USB_CDC_PACKET_TYPE_DIRECTED)
-
-/* variant of gether_setup that allows customizing network device name */
-int gether_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
- const char *netname);
-
-/* netdev setup/teardown as directed by the gadget driver */
-/* gether_setup - initialize one ethernet-over-usb link
- * @g: gadget to associated with these links
- * @ethaddr: NULL, or a buffer in which the ethernet address of the
- * host side of the link is recorded
- * Context: may sleep
- *
- * This sets up the single network link that may be exported by a
- * gadget driver using this framework. The link layer addresses are
- * set up using module parameters.
- *
- * Returns negative errno, or zero on success
- */
-static inline int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN])
-{
- return gether_setup_name(g, ethaddr, "usb");
-}
-
-void gether_cleanup(void);
-
-/* connect/disconnect is handled by individual functions */
-struct net_device *gether_connect(struct gether *);
-void gether_disconnect(struct gether *);
-
-/* Some controllers can't support CDC Ethernet (ECM) ... */
-static inline bool can_support_ecm(struct usb_gadget *gadget)
-{
- if (!gadget_supports_altsettings(gadget))
- return false;
-
- /* Everything else is *presumably* fine ... but this is a bit
- * chancy, so be **CERTAIN** there are no hardware issues with
- * your controller. Add it above if it can't handle CDC.
- */
- return true;
-}
-
-/* each configuration may bind one instance of an ethernet link */
-int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
-int ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
-int ncm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
-int eem_bind_config(struct usb_configuration *c);
-
-#ifdef USB_ETH_RNDIS
-
-int rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
- u32 vendorID, const char *manufacturer);
-
-#else
-
-static inline int
-rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
- u32 vendorID, const char *manufacturer)
-{
- return 0;
-}
-
-#endif
-
-/**
- * rndis_bind_config - add RNDIS network link to a configuration
- * @c: the configuration to support the network link
- * @ethaddr: a buffer in which the ethernet address of the host side
- * side of the link was recorded
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- *
- * Caller must have called @gether_setup(). Caller is also responsible
- * for calling @gether_cleanup() before module unload.
- */
-static inline int rndis_bind_config(struct usb_configuration *c,
- u8 ethaddr[ETH_ALEN])
-{
- return rndis_bind_config_vendor(c, ethaddr, 0, NULL);
-}
-
-
-#endif /* __U_ETHER_H */
+++ /dev/null
-/*
- * u_serial.c - utilities for USB gadget "serial port"/TTY support
- *
- * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
- * Copyright (C) 2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This code also borrows from usbserial.c, which is
- * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2000 Peter Berger (pberger@brimson.com)
- * Copyright (C) 2000 Al Borchers (alborchers@steinerpoint.com)
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-
-#include "u_serial.h"
-
-
-/*
- * This component encapsulates the TTY layer glue needed to provide basic
- * "serial port" functionality through the USB gadget stack. Each such
- * port is exposed through a /dev/ttyGS* node.
- *
- * After initialization (gserial_setup), these TTY port devices stay
- * available until they are removed (gserial_cleanup). Each one may be
- * connected to a USB function (gserial_connect), or disconnected (with
- * gserial_disconnect) when the USB host issues a config change event.
- * Data can only flow when the port is connected to the host.
- *
- * A given TTY port can be made available in multiple configurations.
- * For example, each one might expose a ttyGS0 node which provides a
- * login application. In one case that might use CDC ACM interface 0,
- * while another configuration might use interface 3 for that. The
- * work to handle that (including descriptor management) is not part
- * of this component.
- *
- * Configurations may expose more than one TTY port. For example, if
- * ttyGS0 provides login service, then ttyGS1 might provide dialer access
- * for a telephone or fax link. And ttyGS2 might be something that just
- * needs a simple byte stream interface for some messaging protocol that
- * is managed in userspace ... OBEX, PTP, and MTP have been mentioned.
- */
-
-#define PREFIX "ttyGS"
-
-/*
- * gserial is the lifecycle interface, used by USB functions
- * gs_port is the I/O nexus, used by the tty driver
- * tty_struct links to the tty/filesystem framework
- *
- * gserial <---> gs_port ... links will be null when the USB link is
- * inactive; managed by gserial_{connect,disconnect}(). each gserial
- * instance can wrap its own USB control protocol.
- * gserial->ioport == usb_ep->driver_data ... gs_port
- * gs_port->port_usb ... gserial
- *
- * gs_port <---> tty_struct ... links will be null when the TTY file
- * isn't opened; managed by gs_open()/gs_close()
- * gserial->port_tty ... tty_struct
- * tty_struct->driver_data ... gserial
- */
-
-/* RX and TX queues can buffer QUEUE_SIZE packets before they hit the
- * next layer of buffering. For TX that's a circular buffer; for RX
- * consider it a NOP. A third layer is provided by the TTY code.
- */
-#define QUEUE_SIZE 16
-#define WRITE_BUF_SIZE 8192 /* TX only */
-
-/* circular buffer */
-struct gs_buf {
- unsigned buf_size;
- char *buf_buf;
- char *buf_get;
- char *buf_put;
-};
-
-/*
- * The port structure holds info for each port, one for each minor number
- * (and thus for each /dev/ node).
- */
-struct gs_port {
- struct tty_port port;
- spinlock_t port_lock; /* guard port_* access */
-
- struct gserial *port_usb;
-
- bool openclose; /* open/close in progress */
- u8 port_num;
-
- struct list_head read_pool;
- int read_started;
- int read_allocated;
- struct list_head read_queue;
- unsigned n_read;
- struct tasklet_struct push;
-
- struct list_head write_pool;
- int write_started;
- int write_allocated;
- struct gs_buf port_write_buf;
- wait_queue_head_t drain_wait; /* wait while writes drain */
-
- /* REVISIT this state ... */
- struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
-};
-
-/* increase N_PORTS if you need more */
-#define N_PORTS 4
-static struct portmaster {
- struct mutex lock; /* protect open/close */
- struct gs_port *port;
-} ports[N_PORTS];
-static unsigned n_ports;
-
-#define GS_CLOSE_TIMEOUT 15 /* seconds */
-
-
-
-#ifdef VERBOSE_DEBUG
-#define pr_vdebug(fmt, arg...) \
- pr_debug(fmt, ##arg)
-#else
-#define pr_vdebug(fmt, arg...) \
- ({ if (0) pr_debug(fmt, ##arg); })
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-/* Circular Buffer */
-
-/*
- * gs_buf_alloc
- *
- * Allocate a circular buffer and all associated memory.
- */
-static int gs_buf_alloc(struct gs_buf *gb, unsigned size)
-{
- gb->buf_buf = kmalloc(size, GFP_KERNEL);
- if (gb->buf_buf == NULL)
- return -ENOMEM;
-
- gb->buf_size = size;
- gb->buf_put = gb->buf_buf;
- gb->buf_get = gb->buf_buf;
-
- return 0;
-}
-
-/*
- * gs_buf_free
- *
- * Free the buffer and all associated memory.
- */
-static void gs_buf_free(struct gs_buf *gb)
-{
- kfree(gb->buf_buf);
- gb->buf_buf = NULL;
-}
-
-/*
- * gs_buf_clear
- *
- * Clear out all data in the circular buffer.
- */
-static void gs_buf_clear(struct gs_buf *gb)
-{
- gb->buf_get = gb->buf_put;
- /* equivalent to a get of all data available */
-}
-
-/*
- * gs_buf_data_avail
- *
- * Return the number of bytes of data written into the circular
- * buffer.
- */
-static unsigned gs_buf_data_avail(struct gs_buf *gb)
-{
- return (gb->buf_size + gb->buf_put - gb->buf_get) % gb->buf_size;
-}
-
-/*
- * gs_buf_space_avail
- *
- * Return the number of bytes of space available in the circular
- * buffer.
- */
-static unsigned gs_buf_space_avail(struct gs_buf *gb)
-{
- return (gb->buf_size + gb->buf_get - gb->buf_put - 1) % gb->buf_size;
-}
-
-/*
- * gs_buf_put
- *
- * Copy data data from a user buffer and put it into the circular buffer.
- * Restrict to the amount of space available.
- *
- * Return the number of bytes copied.
- */
-static unsigned
-gs_buf_put(struct gs_buf *gb, const char *buf, unsigned count)
-{
- unsigned len;
-
- len = gs_buf_space_avail(gb);
- if (count > len)
- count = len;
-
- if (count == 0)
- return 0;
-
- len = gb->buf_buf + gb->buf_size - gb->buf_put;
- if (count > len) {
- memcpy(gb->buf_put, buf, len);
- memcpy(gb->buf_buf, buf+len, count - len);
- gb->buf_put = gb->buf_buf + count - len;
- } else {
- memcpy(gb->buf_put, buf, count);
- if (count < len)
- gb->buf_put += count;
- else /* count == len */
- gb->buf_put = gb->buf_buf;
- }
-
- return count;
-}
-
-/*
- * gs_buf_get
- *
- * Get data from the circular buffer and copy to the given buffer.
- * Restrict to the amount of data available.
- *
- * Return the number of bytes copied.
- */
-static unsigned
-gs_buf_get(struct gs_buf *gb, char *buf, unsigned count)
-{
- unsigned len;
-
- len = gs_buf_data_avail(gb);
- if (count > len)
- count = len;
-
- if (count == 0)
- return 0;
-
- len = gb->buf_buf + gb->buf_size - gb->buf_get;
- if (count > len) {
- memcpy(buf, gb->buf_get, len);
- memcpy(buf+len, gb->buf_buf, count - len);
- gb->buf_get = gb->buf_buf + count - len;
- } else {
- memcpy(buf, gb->buf_get, count);
- if (count < len)
- gb->buf_get += count;
- else /* count == len */
- gb->buf_get = gb->buf_buf;
- }
-
- return count;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* I/O glue between TTY (upper) and USB function (lower) driver layers */
-
-/*
- * gs_alloc_req
- *
- * Allocate a usb_request and its buffer. Returns a pointer to the
- * usb_request or NULL if there is an error.
- */
-struct usb_request *
-gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t kmalloc_flags)
-{
- struct usb_request *req;
-
- req = usb_ep_alloc_request(ep, kmalloc_flags);
-
- if (req != NULL) {
- req->length = len;
- req->buf = kmalloc(len, kmalloc_flags);
- if (req->buf == NULL) {
- usb_ep_free_request(ep, req);
- return NULL;
- }
- }
-
- return req;
-}
-
-/*
- * gs_free_req
- *
- * Free a usb_request and its buffer.
- */
-void gs_free_req(struct usb_ep *ep, struct usb_request *req)
-{
- kfree(req->buf);
- usb_ep_free_request(ep, req);
-}
-
-/*
- * gs_send_packet
- *
- * If there is data to send, a packet is built in the given
- * buffer and the size is returned. If there is no data to
- * send, 0 is returned.
- *
- * Called with port_lock held.
- */
-static unsigned
-gs_send_packet(struct gs_port *port, char *packet, unsigned size)
-{
- unsigned len;
-
- len = gs_buf_data_avail(&port->port_write_buf);
- if (len < size)
- size = len;
- if (size != 0)
- size = gs_buf_get(&port->port_write_buf, packet, size);
- return size;
-}
-
-/*
- * gs_start_tx
- *
- * This function finds available write requests, calls
- * gs_send_packet to fill these packets with data, and
- * continues until either there are no more write requests
- * available or no more data to send. This function is
- * run whenever data arrives or write requests are available.
- *
- * Context: caller owns port_lock; port_usb is non-null.
- */
-static int gs_start_tx(struct gs_port *port)
-/*
-__releases(&port->port_lock)
-__acquires(&port->port_lock)
-*/
-{
- struct list_head *pool = &port->write_pool;
- struct usb_ep *in = port->port_usb->in;
- int status = 0;
- bool do_tty_wake = false;
-
- while (!list_empty(pool)) {
- struct usb_request *req;
- int len;
-
- if (port->write_started >= QUEUE_SIZE)
- break;
-
- req = list_entry(pool->next, struct usb_request, list);
- len = gs_send_packet(port, req->buf, in->maxpacket);
- if (len == 0) {
- wake_up_interruptible(&port->drain_wait);
- break;
- }
- do_tty_wake = true;
-
- req->length = len;
- list_del(&req->list);
- req->zero = (gs_buf_data_avail(&port->port_write_buf) == 0);
-
- pr_vdebug(PREFIX "%d: tx len=%d, 0x%02x 0x%02x 0x%02x ...\n",
- port->port_num, len, *((u8 *)req->buf),
- *((u8 *)req->buf+1), *((u8 *)req->buf+2));
-
- /* Drop lock while we call out of driver; completions
- * could be issued while we do so. Disconnection may
- * happen too; maybe immediately before we queue this!
- *
- * NOTE that we may keep sending data for a while after
- * the TTY closed (dev->ioport->port_tty is NULL).
- */
- spin_unlock(&port->port_lock);
- status = usb_ep_queue(in, req, GFP_ATOMIC);
- spin_lock(&port->port_lock);
-
- if (status) {
- pr_debug("%s: %s %s err %d\n",
- __func__, "queue", in->name, status);
- list_add(&req->list, pool);
- break;
- }
-
- port->write_started++;
-
- /* abort immediately after disconnect */
- if (!port->port_usb)
- break;
- }
-
- if (do_tty_wake && port->port.tty)
- tty_wakeup(port->port.tty);
- return status;
-}
-
-/*
- * Context: caller owns port_lock, and port_usb is set
- */
-static unsigned gs_start_rx(struct gs_port *port)
-/*
-__releases(&port->port_lock)
-__acquires(&port->port_lock)
-*/
-{
- struct list_head *pool = &port->read_pool;
- struct usb_ep *out = port->port_usb->out;
-
- while (!list_empty(pool)) {
- struct usb_request *req;
- int status;
- struct tty_struct *tty;
-
- /* no more rx if closed */
- tty = port->port.tty;
- if (!tty)
- break;
-
- if (port->read_started >= QUEUE_SIZE)
- break;
-
- req = list_entry(pool->next, struct usb_request, list);
- list_del(&req->list);
- req->length = out->maxpacket;
-
- /* drop lock while we call out; the controller driver
- * may need to call us back (e.g. for disconnect)
- */
- spin_unlock(&port->port_lock);
- status = usb_ep_queue(out, req, GFP_ATOMIC);
- spin_lock(&port->port_lock);
-
- if (status) {
- pr_debug("%s: %s %s err %d\n",
- __func__, "queue", out->name, status);
- list_add(&req->list, pool);
- break;
- }
- port->read_started++;
-
- /* abort immediately after disconnect */
- if (!port->port_usb)
- break;
- }
- return port->read_started;
-}
-
-/*
- * RX tasklet takes data out of the RX queue and hands it up to the TTY
- * layer until it refuses to take any more data (or is throttled back).
- * Then it issues reads for any further data.
- *
- * If the RX queue becomes full enough that no usb_request is queued,
- * the OUT endpoint may begin NAKing as soon as its FIFO fills up.
- * So QUEUE_SIZE packets plus however many the FIFO holds (usually two)
- * can be buffered before the TTY layer's buffers (currently 64 KB).
- */
-static void gs_rx_push(unsigned long _port)
-{
- struct gs_port *port = (void *)_port;
- struct tty_struct *tty;
- struct list_head *queue = &port->read_queue;
- bool disconnect = false;
- bool do_push = false;
-
- /* hand any queued data to the tty */
- spin_lock_irq(&port->port_lock);
- tty = port->port.tty;
- while (!list_empty(queue)) {
- struct usb_request *req;
-
- req = list_first_entry(queue, struct usb_request, list);
-
- /* leave data queued if tty was rx throttled */
- if (tty && test_bit(TTY_THROTTLED, &tty->flags))
- break;
-
- switch (req->status) {
- case -ESHUTDOWN:
- disconnect = true;
- pr_vdebug(PREFIX "%d: shutdown\n", port->port_num);
- break;
-
- default:
- /* presumably a transient fault */
- pr_warning(PREFIX "%d: unexpected RX status %d\n",
- port->port_num, req->status);
- /* FALLTHROUGH */
- case 0:
- /* normal completion */
- break;
- }
-
- /* push data to (open) tty */
- if (req->actual) {
- char *packet = req->buf;
- unsigned size = req->actual;
- unsigned n;
- int count;
-
- /* we may have pushed part of this packet already... */
- n = port->n_read;
- if (n) {
- packet += n;
- size -= n;
- }
-
- count = tty_insert_flip_string(&port->port, packet, size);
- if (count)
- do_push = true;
- if (count != size) {
- /* stop pushing; TTY layer can't handle more */
- port->n_read += count;
- pr_vdebug(PREFIX "%d: rx block %d/%d\n",
- port->port_num,
- count, req->actual);
- break;
- }
- port->n_read = 0;
- }
- list_move(&req->list, &port->read_pool);
- port->read_started--;
- }
-
- /* Push from tty to ldisc; without low_latency set this is handled by
- * a workqueue, so we won't get callbacks and can hold port_lock
- */
- if (do_push)
- tty_flip_buffer_push(&port->port);
-
-
- /* We want our data queue to become empty ASAP, keeping data
- * in the tty and ldisc (not here). If we couldn't push any
- * this time around, there may be trouble unless there's an
- * implicit tty_unthrottle() call on its way...
- *
- * REVISIT we should probably add a timer to keep the tasklet
- * from starving ... but it's not clear that case ever happens.
- */
- if (!list_empty(queue) && tty) {
- if (!test_bit(TTY_THROTTLED, &tty->flags)) {
- if (do_push)
- tasklet_schedule(&port->push);
- else
- pr_warning(PREFIX "%d: RX not scheduled?\n",
- port->port_num);
- }
- }
-
- /* If we're still connected, refill the USB RX queue. */
- if (!disconnect && port->port_usb)
- gs_start_rx(port);
-
- spin_unlock_irq(&port->port_lock);
-}
-
-static void gs_read_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct gs_port *port = ep->driver_data;
-
- /* Queue all received data until the tty layer is ready for it. */
- spin_lock(&port->port_lock);
- list_add_tail(&req->list, &port->read_queue);
- tasklet_schedule(&port->push);
- spin_unlock(&port->port_lock);
-}
-
-static void gs_write_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct gs_port *port = ep->driver_data;
-
- spin_lock(&port->port_lock);
- list_add(&req->list, &port->write_pool);
- port->write_started--;
-
- switch (req->status) {
- default:
- /* presumably a transient fault */
- pr_warning("%s: unexpected %s status %d\n",
- __func__, ep->name, req->status);
- /* FALL THROUGH */
- case 0:
- /* normal completion */
- gs_start_tx(port);
- break;
-
- case -ESHUTDOWN:
- /* disconnect */
- pr_vdebug("%s: %s shutdown\n", __func__, ep->name);
- break;
- }
-
- spin_unlock(&port->port_lock);
-}
-
-static void gs_free_requests(struct usb_ep *ep, struct list_head *head,
- int *allocated)
-{
- struct usb_request *req;
-
- while (!list_empty(head)) {
- req = list_entry(head->next, struct usb_request, list);
- list_del(&req->list);
- gs_free_req(ep, req);
- if (allocated)
- (*allocated)--;
- }
-}
-
-static int gs_alloc_requests(struct usb_ep *ep, struct list_head *head,
- void (*fn)(struct usb_ep *, struct usb_request *),
- int *allocated)
-{
- int i;
- struct usb_request *req;
- int n = allocated ? QUEUE_SIZE - *allocated : QUEUE_SIZE;
-
- /* Pre-allocate up to QUEUE_SIZE transfers, but if we can't
- * do quite that many this time, don't fail ... we just won't
- * be as speedy as we might otherwise be.
- */
- for (i = 0; i < n; i++) {
- req = gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC);
- if (!req)
- return list_empty(head) ? -ENOMEM : 0;
- req->complete = fn;
- list_add_tail(&req->list, head);
- if (allocated)
- (*allocated)++;
- }
- return 0;
-}
-
-/**
- * gs_start_io - start USB I/O streams
- * @dev: encapsulates endpoints to use
- * Context: holding port_lock; port_tty and port_usb are non-null
- *
- * We only start I/O when something is connected to both sides of
- * this port. If nothing is listening on the host side, we may
- * be pointlessly filling up our TX buffers and FIFO.
- */
-static int gs_start_io(struct gs_port *port)
-{
- struct list_head *head = &port->read_pool;
- struct usb_ep *ep = port->port_usb->out;
- int status;
- unsigned started;
-
- /* Allocate RX and TX I/O buffers. We can't easily do this much
- * earlier (with GFP_KERNEL) because the requests are coupled to
- * endpoints, as are the packet sizes we'll be using. Different
- * configurations may use different endpoints with a given port;
- * and high speed vs full speed changes packet sizes too.
- */
- status = gs_alloc_requests(ep, head, gs_read_complete,
- &port->read_allocated);
- if (status)
- return status;
-
- status = gs_alloc_requests(port->port_usb->in, &port->write_pool,
- gs_write_complete, &port->write_allocated);
- if (status) {
- gs_free_requests(ep, head, &port->read_allocated);
- return status;
- }
-
- /* queue read requests */
- port->n_read = 0;
- started = gs_start_rx(port);
-
- /* unblock any pending writes into our circular buffer */
- if (started) {
- tty_wakeup(port->port.tty);
- } else {
- gs_free_requests(ep, head, &port->read_allocated);
- gs_free_requests(port->port_usb->in, &port->write_pool,
- &port->write_allocated);
- status = -EIO;
- }
-
- return status;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* TTY Driver */
-
-/*
- * gs_open sets up the link between a gs_port and its associated TTY.
- * That link is broken *only* by TTY close(), and all driver methods
- * know that.
- */
-static int gs_open(struct tty_struct *tty, struct file *file)
-{
- int port_num = tty->index;
- struct gs_port *port;
- int status;
-
- do {
- mutex_lock(&ports[port_num].lock);
- port = ports[port_num].port;
- if (!port)
- status = -ENODEV;
- else {
- spin_lock_irq(&port->port_lock);
-
- /* already open? Great. */
- if (port->port.count) {
- status = 0;
- port->port.count++;
-
- /* currently opening/closing? wait ... */
- } else if (port->openclose) {
- status = -EBUSY;
-
- /* ... else we do the work */
- } else {
- status = -EAGAIN;
- port->openclose = true;
- }
- spin_unlock_irq(&port->port_lock);
- }
- mutex_unlock(&ports[port_num].lock);
-
- switch (status) {
- default:
- /* fully handled */
- return status;
- case -EAGAIN:
- /* must do the work */
- break;
- case -EBUSY:
- /* wait for EAGAIN task to finish */
- msleep(1);
- /* REVISIT could have a waitchannel here, if
- * concurrent open performance is important
- */
- break;
- }
- } while (status != -EAGAIN);
-
- /* Do the "real open" */
- spin_lock_irq(&port->port_lock);
-
- /* allocate circular buffer on first open */
- if (port->port_write_buf.buf_buf == NULL) {
-
- spin_unlock_irq(&port->port_lock);
- status = gs_buf_alloc(&port->port_write_buf, WRITE_BUF_SIZE);
- spin_lock_irq(&port->port_lock);
-
- if (status) {
- pr_debug("gs_open: ttyGS%d (%p,%p) no buffer\n",
- port->port_num, tty, file);
- port->openclose = false;
- goto exit_unlock_port;
- }
- }
-
- /* REVISIT if REMOVED (ports[].port NULL), abort the open
- * to let rmmod work faster (but this way isn't wrong).
- */
-
- /* REVISIT maybe wait for "carrier detect" */
-
- tty->driver_data = port;
- port->port.tty = tty;
-
- port->port.count = 1;
- port->openclose = false;
-
- /* if connected, start the I/O stream */
- if (port->port_usb) {
- struct gserial *gser = port->port_usb;
-
- pr_debug("gs_open: start ttyGS%d\n", port->port_num);
- gs_start_io(port);
-
- if (gser->connect)
- gser->connect(gser);
- }
-
- pr_debug("gs_open: ttyGS%d (%p,%p)\n", port->port_num, tty, file);
-
- status = 0;
-
-exit_unlock_port:
- spin_unlock_irq(&port->port_lock);
- return status;
-}
-
-static int gs_writes_finished(struct gs_port *p)
-{
- int cond;
-
- /* return true on disconnect or empty buffer */
- spin_lock_irq(&p->port_lock);
- cond = (p->port_usb == NULL) || !gs_buf_data_avail(&p->port_write_buf);
- spin_unlock_irq(&p->port_lock);
-
- return cond;
-}
-
-static void gs_close(struct tty_struct *tty, struct file *file)
-{
- struct gs_port *port = tty->driver_data;
- struct gserial *gser;
-
- spin_lock_irq(&port->port_lock);
-
- if (port->port.count != 1) {
- if (port->port.count == 0)
- WARN_ON(1);
- else
- --port->port.count;
- goto exit;
- }
-
- pr_debug("gs_close: ttyGS%d (%p,%p) ...\n", port->port_num, tty, file);
-
- /* mark port as closing but in use; we can drop port lock
- * and sleep if necessary
- */
- port->openclose = true;
- port->port.count = 0;
-
- gser = port->port_usb;
- if (gser && gser->disconnect)
- gser->disconnect(gser);
-
- /* wait for circular write buffer to drain, disconnect, or at
- * most GS_CLOSE_TIMEOUT seconds; then discard the rest
- */
- if (gs_buf_data_avail(&port->port_write_buf) > 0 && gser) {
- spin_unlock_irq(&port->port_lock);
- wait_event_interruptible_timeout(port->drain_wait,
- gs_writes_finished(port),
- GS_CLOSE_TIMEOUT * HZ);
- spin_lock_irq(&port->port_lock);
- gser = port->port_usb;
- }
-
- /* Iff we're disconnected, there can be no I/O in flight so it's
- * ok to free the circular buffer; else just scrub it. And don't
- * let the push tasklet fire again until we're re-opened.
- */
- if (gser == NULL)
- gs_buf_free(&port->port_write_buf);
- else
- gs_buf_clear(&port->port_write_buf);
-
- tty->driver_data = NULL;
- port->port.tty = NULL;
-
- port->openclose = false;
-
- pr_debug("gs_close: ttyGS%d (%p,%p) done!\n",
- port->port_num, tty, file);
-
- wake_up_interruptible(&port->port.close_wait);
-exit:
- spin_unlock_irq(&port->port_lock);
-}
-
-static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int status;
-
- pr_vdebug("gs_write: ttyGS%d (%p) writing %d bytes\n",
- port->port_num, tty, count);
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (count)
- count = gs_buf_put(&port->port_write_buf, buf, count);
- /* treat count == 0 as flush_chars() */
- if (port->port_usb)
- status = gs_start_tx(port);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- return count;
-}
-
-static int gs_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int status;
-
- pr_vdebug("gs_put_char: (%d,%p) char=0x%x, called from %pf\n",
- port->port_num, tty, ch, __builtin_return_address(0));
-
- spin_lock_irqsave(&port->port_lock, flags);
- status = gs_buf_put(&port->port_write_buf, &ch, 1);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- return status;
-}
-
-static void gs_flush_chars(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
-
- pr_vdebug("gs_flush_chars: (%d,%p)\n", port->port_num, tty);
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port_usb)
- gs_start_tx(port);
- spin_unlock_irqrestore(&port->port_lock, flags);
-}
-
-static int gs_write_room(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int room = 0;
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port_usb)
- room = gs_buf_space_avail(&port->port_write_buf);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- pr_vdebug("gs_write_room: (%d,%p) room=%d\n",
- port->port_num, tty, room);
-
- return room;
-}
-
-static int gs_chars_in_buffer(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
- int chars = 0;
-
- spin_lock_irqsave(&port->port_lock, flags);
- chars = gs_buf_data_avail(&port->port_write_buf);
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- pr_vdebug("gs_chars_in_buffer: (%d,%p) chars=%d\n",
- port->port_num, tty, chars);
-
- return chars;
-}
-
-/* undo side effects of setting TTY_THROTTLED */
-static void gs_unthrottle(struct tty_struct *tty)
-{
- struct gs_port *port = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port_usb) {
- /* Kickstart read queue processing. We don't do xon/xoff,
- * rts/cts, or other handshaking with the host, but if the
- * read queue backs up enough we'll be NAKing OUT packets.
- */
- tasklet_schedule(&port->push);
- pr_vdebug(PREFIX "%d: unthrottle\n", port->port_num);
- }
- spin_unlock_irqrestore(&port->port_lock, flags);
-}
-
-static int gs_break_ctl(struct tty_struct *tty, int duration)
-{
- struct gs_port *port = tty->driver_data;
- int status = 0;
- struct gserial *gser;
-
- pr_vdebug("gs_break_ctl: ttyGS%d, send break (%d) \n",
- port->port_num, duration);
-
- spin_lock_irq(&port->port_lock);
- gser = port->port_usb;
- if (gser && gser->send_break)
- status = gser->send_break(gser, duration);
- spin_unlock_irq(&port->port_lock);
-
- return status;
-}
-
-static const struct tty_operations gs_tty_ops = {
- .open = gs_open,
- .close = gs_close,
- .write = gs_write,
- .put_char = gs_put_char,
- .flush_chars = gs_flush_chars,
- .write_room = gs_write_room,
- .chars_in_buffer = gs_chars_in_buffer,
- .unthrottle = gs_unthrottle,
- .break_ctl = gs_break_ctl,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static struct tty_driver *gs_tty_driver;
-
-static int
-gs_port_alloc(unsigned port_num, struct usb_cdc_line_coding *coding)
-{
- struct gs_port *port;
-
- port = kzalloc(sizeof(struct gs_port), GFP_KERNEL);
- if (port == NULL)
- return -ENOMEM;
-
- tty_port_init(&port->port);
- spin_lock_init(&port->port_lock);
- init_waitqueue_head(&port->drain_wait);
-
- tasklet_init(&port->push, gs_rx_push, (unsigned long) port);
-
- INIT_LIST_HEAD(&port->read_pool);
- INIT_LIST_HEAD(&port->read_queue);
- INIT_LIST_HEAD(&port->write_pool);
-
- port->port_num = port_num;
- port->port_line_coding = *coding;
-
- ports[port_num].port = port;
-
- return 0;
-}
-
-/**
- * gserial_setup - initialize TTY driver for one or more ports
- * @g: gadget to associate with these ports
- * @count: how many ports to support
- * Context: may sleep
- *
- * The TTY stack needs to know in advance how many devices it should
- * plan to manage. Use this call to set up the ports you will be
- * exporting through USB. Later, connect them to functions based
- * on what configuration is activated by the USB host; and disconnect
- * them as appropriate.
- *
- * An example would be a two-configuration device in which both
- * configurations expose port 0, but through different functions.
- * One configuration could even expose port 1 while the other
- * one doesn't.
- *
- * Returns negative errno or zero.
- */
-int gserial_setup(struct usb_gadget *g, unsigned count)
-{
- unsigned i;
- struct usb_cdc_line_coding coding;
- int status;
-
- if (count == 0 || count > N_PORTS)
- return -EINVAL;
-
- gs_tty_driver = alloc_tty_driver(count);
- if (!gs_tty_driver)
- return -ENOMEM;
-
- gs_tty_driver->driver_name = "g_serial";
- gs_tty_driver->name = PREFIX;
- /* uses dynamically assigned dev_t values */
-
- gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- gs_tty_driver->subtype = SERIAL_TYPE_NORMAL;
- gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- gs_tty_driver->init_termios = tty_std_termios;
-
- /* 9600-8-N-1 ... matches defaults expected by "usbser.sys" on
- * MS-Windows. Otherwise, most of these flags shouldn't affect
- * anything unless we were to actually hook up to a serial line.
- */
- gs_tty_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- gs_tty_driver->init_termios.c_ispeed = 9600;
- gs_tty_driver->init_termios.c_ospeed = 9600;
-
- coding.dwDTERate = cpu_to_le32(9600);
- coding.bCharFormat = 8;
- coding.bParityType = USB_CDC_NO_PARITY;
- coding.bDataBits = USB_CDC_1_STOP_BITS;
-
- tty_set_operations(gs_tty_driver, &gs_tty_ops);
-
- /* make devices be openable */
- for (i = 0; i < count; i++) {
- mutex_init(&ports[i].lock);
- status = gs_port_alloc(i, &coding);
- if (status) {
- count = i;
- goto fail;
- }
- }
- n_ports = count;
-
- /* export the driver ... */
- status = tty_register_driver(gs_tty_driver);
- if (status) {
- pr_err("%s: cannot register, err %d\n",
- __func__, status);
- goto fail;
- }
-
- /* ... and sysfs class devices, so mdev/udev make /dev/ttyGS* */
- for (i = 0; i < count; i++) {
- struct device *tty_dev;
-
- tty_dev = tty_register_device(gs_tty_driver, i, &g->dev);
- if (IS_ERR(tty_dev))
- pr_warning("%s: no classdev for port %d, err %ld\n",
- __func__, i, PTR_ERR(tty_dev));
- }
-
- pr_debug("%s: registered %d ttyGS* device%s\n", __func__,
- count, (count == 1) ? "" : "s");
-
- return status;
-fail:
- while (count--) {
- tty_port_destroy(&ports[count].port->port);
- kfree(ports[count].port);
- }
- put_tty_driver(gs_tty_driver);
- gs_tty_driver = NULL;
- return status;
-}
-
-static int gs_closed(struct gs_port *port)
-{
- int cond;
-
- spin_lock_irq(&port->port_lock);
- cond = (port->port.count == 0) && !port->openclose;
- spin_unlock_irq(&port->port_lock);
- return cond;
-}
-
-/**
- * gserial_cleanup - remove TTY-over-USB driver and devices
- * Context: may sleep
- *
- * This is called to free all resources allocated by @gserial_setup().
- * Accordingly, it may need to wait until some open /dev/ files have
- * closed.
- *
- * The caller must have issued @gserial_disconnect() for any ports
- * that had previously been connected, so that there is never any
- * I/O pending when it's called.
- */
-void gserial_cleanup(void)
-{
- unsigned i;
- struct gs_port *port;
-
- if (!gs_tty_driver)
- return;
-
- /* start sysfs and /dev/ttyGS* node removal */
- for (i = 0; i < n_ports; i++)
- tty_unregister_device(gs_tty_driver, i);
-
- for (i = 0; i < n_ports; i++) {
- /* prevent new opens */
- mutex_lock(&ports[i].lock);
- port = ports[i].port;
- ports[i].port = NULL;
- mutex_unlock(&ports[i].lock);
-
- tasklet_kill(&port->push);
-
- /* wait for old opens to finish */
- wait_event(port->port.close_wait, gs_closed(port));
-
- WARN_ON(port->port_usb != NULL);
-
- tty_port_destroy(&port->port);
- kfree(port);
- }
- n_ports = 0;
-
- tty_unregister_driver(gs_tty_driver);
- put_tty_driver(gs_tty_driver);
- gs_tty_driver = NULL;
-
- pr_debug("%s: cleaned up ttyGS* support\n", __func__);
-}
-
-/**
- * gserial_connect - notify TTY I/O glue that USB link is active
- * @gser: the function, set up with endpoints and descriptors
- * @port_num: which port is active
- * Context: any (usually from irq)
- *
- * This is called activate endpoints and let the TTY layer know that
- * the connection is active ... not unlike "carrier detect". It won't
- * necessarily start I/O queues; unless the TTY is held open by any
- * task, there would be no point. However, the endpoints will be
- * activated so the USB host can perform I/O, subject to basic USB
- * hardware flow control.
- *
- * Caller needs to have set up the endpoints and USB function in @dev
- * before calling this, as well as the appropriate (speed-specific)
- * endpoint descriptors, and also have set up the TTY driver by calling
- * @gserial_setup().
- *
- * Returns negative errno or zero.
- * On success, ep->driver_data will be overwritten.
- */
-int gserial_connect(struct gserial *gser, u8 port_num)
-{
- struct gs_port *port;
- unsigned long flags;
- int status;
-
- if (!gs_tty_driver || port_num >= n_ports)
- return -ENXIO;
-
- /* we "know" gserial_cleanup() hasn't been called */
- port = ports[port_num].port;
-
- /* activate the endpoints */
- status = usb_ep_enable(gser->in);
- if (status < 0)
- return status;
- gser->in->driver_data = port;
-
- status = usb_ep_enable(gser->out);
- if (status < 0)
- goto fail_out;
- gser->out->driver_data = port;
-
- /* then tell the tty glue that I/O can work */
- spin_lock_irqsave(&port->port_lock, flags);
- gser->ioport = port;
- port->port_usb = gser;
-
- /* REVISIT unclear how best to handle this state...
- * we don't really couple it with the Linux TTY.
- */
- gser->port_line_coding = port->port_line_coding;
-
- /* REVISIT if waiting on "carrier detect", signal. */
-
- /* if it's already open, start I/O ... and notify the serial
- * protocol about open/close status (connect/disconnect).
- */
- if (port->port.count) {
- pr_debug("gserial_connect: start ttyGS%d\n", port->port_num);
- gs_start_io(port);
- if (gser->connect)
- gser->connect(gser);
- } else {
- if (gser->disconnect)
- gser->disconnect(gser);
- }
-
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- return status;
-
-fail_out:
- usb_ep_disable(gser->in);
- gser->in->driver_data = NULL;
- return status;
-}
-
-/**
- * gserial_disconnect - notify TTY I/O glue that USB link is inactive
- * @gser: the function, on which gserial_connect() was called
- * Context: any (usually from irq)
- *
- * This is called to deactivate endpoints and let the TTY layer know
- * that the connection went inactive ... not unlike "hangup".
- *
- * On return, the state is as if gserial_connect() had never been called;
- * there is no active USB I/O on these endpoints.
- */
-void gserial_disconnect(struct gserial *gser)
-{
- struct gs_port *port = gser->ioport;
- unsigned long flags;
-
- if (!port)
- return;
-
- /* tell the TTY glue not to do I/O here any more */
- spin_lock_irqsave(&port->port_lock, flags);
-
- /* REVISIT as above: how best to track this? */
- port->port_line_coding = gser->port_line_coding;
-
- port->port_usb = NULL;
- gser->ioport = NULL;
- if (port->port.count > 0 || port->openclose) {
- wake_up_interruptible(&port->drain_wait);
- if (port->port.tty)
- tty_hangup(port->port.tty);
- }
- spin_unlock_irqrestore(&port->port_lock, flags);
-
- /* disable endpoints, aborting down any active I/O */
- usb_ep_disable(gser->out);
- gser->out->driver_data = NULL;
-
- usb_ep_disable(gser->in);
- gser->in->driver_data = NULL;
-
- /* finally, free any unused/unusable I/O buffers */
- spin_lock_irqsave(&port->port_lock, flags);
- if (port->port.count == 0 && !port->openclose)
- gs_buf_free(&port->port_write_buf);
- gs_free_requests(gser->out, &port->read_pool, NULL);
- gs_free_requests(gser->out, &port->read_queue, NULL);
- gs_free_requests(gser->in, &port->write_pool, NULL);
-
- port->read_allocated = port->read_started =
- port->write_allocated = port->write_started = 0;
-
- spin_unlock_irqrestore(&port->port_lock, flags);
-}
+++ /dev/null
-/*
- * u_serial.h - interface to USB gadget "serial port"/TTY utilities
- *
- * Copyright (C) 2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * This software is distributed under the terms of the GNU General
- * Public License ("GPL") as published by the Free Software Foundation,
- * either version 2 of that License or (at your option) any later version.
- */
-
-#ifndef __U_SERIAL_H
-#define __U_SERIAL_H
-
-#include <linux/usb/composite.h>
-#include <linux/usb/cdc.h>
-
-/*
- * One non-multiplexed "serial" I/O port ... there can be several of these
- * on any given USB peripheral device, if it provides enough endpoints.
- *
- * The "u_serial" utility component exists to do one thing: manage TTY
- * style I/O using the USB peripheral endpoints listed here, including
- * hookups to sysfs and /dev for each logical "tty" device.
- *
- * REVISIT at least ACM could support tiocmget() if needed.
- *
- * REVISIT someday, allow multiplexing several TTYs over these endpoints.
- */
-struct gserial {
- struct usb_function func;
-
- /* port is managed by gserial_{connect,disconnect} */
- struct gs_port *ioport;
-
- struct usb_ep *in;
- struct usb_ep *out;
-
- /* REVISIT avoid this CDC-ACM support harder ... */
- struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
-
- /* notification callbacks */
- void (*connect)(struct gserial *p);
- void (*disconnect)(struct gserial *p);
- int (*send_break)(struct gserial *p, int duration);
-};
-
-/* utilities to allocate/free request and buffer */
-struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t flags);
-void gs_free_req(struct usb_ep *, struct usb_request *req);
-
-/* port setup/teardown is handled by gadget driver */
-int gserial_setup(struct usb_gadget *g, unsigned n_ports);
-void gserial_cleanup(void);
-
-/* connect/disconnect is handled by individual functions */
-int gserial_connect(struct gserial *, u8 port_num);
-void gserial_disconnect(struct gserial *);
-
-/* functions are bound to configurations by a config or gadget driver */
-int acm_bind_config(struct usb_configuration *c, u8 port_num);
-int gser_bind_config(struct usb_configuration *c, u8 port_num);
-int obex_bind_config(struct usb_configuration *c, u8 port_num);
-
-#endif /* __U_SERIAL_H */
+++ /dev/null
-/*
- * Copyright (C) 2003 David Brownell
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/string.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/nls.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-
-/**
- * usb_gadget_get_string - fill out a string descriptor
- * @table: of c strings encoded using UTF-8
- * @id: string id, from low byte of wValue in get string descriptor
- * @buf: at least 256 bytes, must be 16-bit aligned
- *
- * Finds the UTF-8 string matching the ID, and converts it into a
- * string descriptor in utf16-le.
- * Returns length of descriptor (always even) or negative errno
- *
- * If your driver needs stings in multiple languages, you'll probably
- * "switch (wIndex) { ... }" in your ep0 string descriptor logic,
- * using this routine after choosing which set of UTF-8 strings to use.
- * Note that US-ASCII is a strict subset of UTF-8; any string bytes with
- * the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1
- * characters (which are also widely used in C strings).
- */
-int
-usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf)
-{
- struct usb_string *s;
- int len;
-
- /* descriptor 0 has the language id */
- if (id == 0) {
- buf [0] = 4;
- buf [1] = USB_DT_STRING;
- buf [2] = (u8) table->language;
- buf [3] = (u8) (table->language >> 8);
- return 4;
- }
- for (s = table->strings; s && s->s; s++)
- if (s->id == id)
- break;
-
- /* unrecognized: stall. */
- if (!s || !s->s)
- return -EINVAL;
-
- /* string descriptors have length, tag, then UTF16-LE text */
- len = min ((size_t) 126, strlen (s->s));
- len = utf8s_to_utf16s(s->s, len, UTF16_LITTLE_ENDIAN,
- (wchar_t *) &buf[2], 126);
- if (len < 0)
- return -EINVAL;
- buf [0] = (len + 1) * 2;
- buf [1] = USB_DT_STRING;
- return buf [0];
-}
-
projects / platform / kernel / linux-exynos.git / commitdiff