+++ /dev/null
-/*
- * lirc_sasem.c - USB remote support for LIRC
- * Version 0.5
- *
- * Copyright (C) 2004-2005 Oliver Stabel <oliver.stabel@gmx.de>
- * Tim Davies <tim@opensystems.net.au>
- *
- * This driver was derived from:
- * Venky Raju <dev@venky.ws>
- * "lirc_imon - "LIRC/VFD driver for Ahanix/Soundgraph IMON IR/VFD"
- * Paul Miller <pmiller9@users.sourceforge.net>'s 2003-2004
- * "lirc_atiusb - USB remote support for LIRC"
- * Culver Consulting Services <henry@culcon.com>'s 2003
- * "Sasem OnAir VFD/IR USB driver"
- *
- *
- * NOTE - The LCDproc iMon driver should work with this module. More info at
- * http://www.frogstorm.info/sasem
- */
-
-/*
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/usb.h>
-#include <linux/ktime.h>
-
-#include <media/lirc.h>
-#include <media/lirc_dev.h>
-
-#define MOD_AUTHOR "Oliver Stabel <oliver.stabel@gmx.de>, " \
- "Tim Davies <tim@opensystems.net.au>"
-#define MOD_DESC "USB Driver for Sasem Remote Controller V1.1"
-#define MOD_NAME "lirc_sasem"
-#define MOD_VERSION "0.5"
-
-#define VFD_MINOR_BASE 144 /* Same as LCD */
-#define DEVICE_NAME "lcd%d"
-
-#define BUF_CHUNK_SIZE 8
-#define BUF_SIZE 128
-
-#define IOCTL_LCD_CONTRAST 1
-
-/*** P R O T O T Y P E S ***/
-
-/* USB Callback prototypes */
-static int sasem_probe(struct usb_interface *interface,
- const struct usb_device_id *id);
-static void sasem_disconnect(struct usb_interface *interface);
-static void usb_rx_callback(struct urb *urb);
-static void usb_tx_callback(struct urb *urb);
-
-/* VFD file_operations function prototypes */
-static int vfd_open(struct inode *inode, struct file *file);
-static long vfd_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-static int vfd_close(struct inode *inode, struct file *file);
-static ssize_t vfd_write(struct file *file, const char __user *buf,
- size_t n_bytes, loff_t *pos);
-
-/* LIRC driver function prototypes */
-static int ir_open(void *data);
-static void ir_close(void *data);
-
-/*** G L O B A L S ***/
-#define SASEM_DATA_BUF_SZ 32
-
-struct sasem_context {
- struct usb_device *dev;
- int vfd_isopen; /* VFD port has been opened */
- unsigned int vfd_contrast; /* VFD contrast */
- int ir_isopen; /* IR port has been opened */
- int dev_present; /* USB device presence */
- struct mutex ctx_lock; /* to lock this object */
- wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
-
- struct lirc_driver *driver;
- struct usb_endpoint_descriptor *rx_endpoint;
- struct usb_endpoint_descriptor *tx_endpoint;
- struct urb *rx_urb;
- struct urb *tx_urb;
- unsigned char usb_rx_buf[8];
- unsigned char usb_tx_buf[8];
-
- struct tx_t {
- unsigned char data_buf[SASEM_DATA_BUF_SZ]; /* user data
- * buffer
- */
- struct completion finished; /* wait for write to finish */
- atomic_t busy; /* write in progress */
- int status; /* status of tx completion */
- } tx;
-
- /* for dealing with repeat codes (wish there was a toggle bit!) */
- ktime_t presstime;
- char lastcode[8];
- int codesaved;
-};
-
-/* VFD file operations */
-static const struct file_operations vfd_fops = {
- .owner = THIS_MODULE,
- .open = &vfd_open,
- .write = vfd_write,
- .unlocked_ioctl = &vfd_ioctl,
- .release = &vfd_close,
- .llseek = noop_llseek,
-};
-
-/* USB Device ID for Sasem USB Control Board */
-static struct usb_device_id sasem_usb_id_table[] = {
- /* Sasem USB Control Board */
- { USB_DEVICE(0x11ba, 0x0101) },
- /* Terminating entry */
- {}
-};
-
-/* USB Device data */
-static struct usb_driver sasem_driver = {
- .name = MOD_NAME,
- .probe = sasem_probe,
- .disconnect = sasem_disconnect,
- .id_table = sasem_usb_id_table,
-};
-
-static struct usb_class_driver sasem_class = {
- .name = DEVICE_NAME,
- .fops = &vfd_fops,
- .minor_base = VFD_MINOR_BASE,
-};
-
-/* to prevent races between open() and disconnect() */
-static DEFINE_MUTEX(disconnect_lock);
-
-static int debug;
-
-
-/*** M O D U L E C O D E ***/
-MODULE_AUTHOR(MOD_AUTHOR);
-MODULE_DESCRIPTION(MOD_DESC);
-MODULE_LICENSE("GPL");
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
-
-static void delete_context(struct sasem_context *context)
-{
- usb_free_urb(context->tx_urb); /* VFD */
- usb_free_urb(context->rx_urb); /* IR */
- lirc_buffer_free(context->driver->rbuf);
- kfree(context->driver->rbuf);
- kfree(context->driver);
- kfree(context);
-}
-
-static void deregister_from_lirc(struct sasem_context *context)
-{
- int retval;
- int minor = context->driver->minor;
-
- retval = lirc_unregister_driver(minor);
- if (retval)
- dev_err(&context->dev->dev,
- "%s: unable to deregister from lirc (%d)\n",
- __func__, retval);
- else
- dev_info(&context->dev->dev,
- "Deregistered Sasem driver (minor:%d)\n", minor);
-}
-
-/**
- * Called when the VFD device (e.g. /dev/usb/lcd)
- * is opened by the application.
- */
-static int vfd_open(struct inode *inode, struct file *file)
-{
- struct usb_interface *interface;
- struct sasem_context *context = NULL;
- int subminor;
- int retval = 0;
-
- /* prevent races with disconnect */
- mutex_lock(&disconnect_lock);
-
- subminor = iminor(inode);
- interface = usb_find_interface(&sasem_driver, subminor);
- if (!interface) {
- pr_err("%s: could not find interface for minor %d\n",
- __func__, subminor);
- retval = -ENODEV;
- goto exit;
- }
- context = usb_get_intfdata(interface);
-
- if (!context) {
- dev_err(&interface->dev, "no context found for minor %d\n",
- subminor);
- retval = -ENODEV;
- goto exit;
- }
-
- mutex_lock(&context->ctx_lock);
-
- if (context->vfd_isopen) {
- dev_err(&interface->dev,
- "%s: VFD port is already open", __func__);
- retval = -EBUSY;
- } else {
- context->vfd_isopen = 1;
- file->private_data = context;
- dev_info(&interface->dev, "VFD port opened\n");
- }
-
- mutex_unlock(&context->ctx_lock);
-
-exit:
- mutex_unlock(&disconnect_lock);
- return retval;
-}
-
-/**
- * Called when the VFD device (e.g. /dev/usb/lcd)
- * is closed by the application.
- */
-static long vfd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- struct sasem_context *context;
-
- context = (struct sasem_context *) file->private_data;
-
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return -ENODEV;
- }
-
- mutex_lock(&context->ctx_lock);
-
- switch (cmd) {
- case IOCTL_LCD_CONTRAST:
- if (arg > 1000)
- arg = 1000;
- context->vfd_contrast = (unsigned int)arg;
- break;
- default:
- pr_info("Unknown IOCTL command\n");
- mutex_unlock(&context->ctx_lock);
- return -ENOIOCTLCMD; /* not supported */
- }
-
- mutex_unlock(&context->ctx_lock);
- return 0;
-}
-
-/**
- * Called when the VFD device (e.g. /dev/usb/lcd)
- * is closed by the application.
- */
-static int vfd_close(struct inode *inode, struct file *file)
-{
- struct sasem_context *context = NULL;
- int retval = 0;
-
- context = (struct sasem_context *) file->private_data;
-
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return -ENODEV;
- }
-
- mutex_lock(&context->ctx_lock);
-
- if (!context->vfd_isopen) {
- dev_err(&context->dev->dev, "%s: VFD is not open\n", __func__);
- retval = -EIO;
- } else {
- context->vfd_isopen = 0;
- dev_info(&context->dev->dev, "VFD port closed\n");
- if (!context->dev_present && !context->ir_isopen) {
- /* Device disconnected before close and IR port is
- * not open. If IR port is open, context will be
- * deleted by ir_close.
- */
- mutex_unlock(&context->ctx_lock);
- delete_context(context);
- return retval;
- }
- }
-
- mutex_unlock(&context->ctx_lock);
- return retval;
-}
-
-/**
- * Sends a packet to the VFD.
- */
-static int send_packet(struct sasem_context *context)
-{
- unsigned int pipe;
- int interval = 0;
- int retval = 0;
-
- pipe = usb_sndintpipe(context->dev,
- context->tx_endpoint->bEndpointAddress);
- interval = context->tx_endpoint->bInterval;
-
- usb_fill_int_urb(context->tx_urb, context->dev, pipe,
- context->usb_tx_buf, sizeof(context->usb_tx_buf),
- usb_tx_callback, context, interval);
-
- context->tx_urb->actual_length = 0;
-
- init_completion(&context->tx.finished);
- atomic_set(&context->tx.busy, 1);
-
- retval = usb_submit_urb(context->tx_urb, GFP_KERNEL);
- if (retval) {
- atomic_set(&context->tx.busy, 0);
- dev_err(&context->dev->dev, "error submitting urb (%d)\n",
- retval);
- } else {
- /* Wait for transmission to complete (or abort) */
- mutex_unlock(&context->ctx_lock);
- wait_for_completion(&context->tx.finished);
- mutex_lock(&context->ctx_lock);
-
- retval = context->tx.status;
- if (retval)
- dev_err(&context->dev->dev,
- "packet tx failed (%d)\n", retval);
- }
-
- return retval;
-}
-
-/**
- * Writes data to the VFD. The Sasem VFD is 2x16 characters
- * and requires data in 9 consecutive USB interrupt packets,
- * each packet carrying 8 bytes.
- */
-static ssize_t vfd_write(struct file *file, const char __user *buf,
- size_t n_bytes, loff_t *pos)
-{
- int i;
- int retval = 0;
- struct sasem_context *context;
- int *data_buf = NULL;
-
- context = (struct sasem_context *) file->private_data;
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return -ENODEV;
- }
-
- mutex_lock(&context->ctx_lock);
-
- if (!context->dev_present) {
- pr_err("%s: no Sasem device present\n", __func__);
- retval = -ENODEV;
- goto exit;
- }
-
- if (n_bytes <= 0 || n_bytes > SASEM_DATA_BUF_SZ) {
- dev_err(&context->dev->dev, "%s: invalid payload size\n",
- __func__);
- retval = -EINVAL;
- goto exit;
- }
-
- data_buf = memdup_user(buf, n_bytes);
- if (IS_ERR(data_buf)) {
- mutex_unlock(&context->ctx_lock);
- return PTR_ERR(data_buf);
- }
-
- memcpy(context->tx.data_buf, data_buf, n_bytes);
-
- /* Pad with spaces */
- for (i = n_bytes; i < SASEM_DATA_BUF_SZ; ++i)
- context->tx.data_buf[i] = ' ';
-
- /* Nine 8 byte packets to be sent */
- /* NOTE: "\x07\x01\0\0\0\0\0\0" or "\x0c\0\0\0\0\0\0\0"
- * will clear the VFD
- */
- for (i = 0; i < 9; i++) {
- switch (i) {
- case 0:
- memcpy(context->usb_tx_buf, "\x07\0\0\0\0\0\0\0", 8);
- context->usb_tx_buf[1] = (context->vfd_contrast) ?
- (0x2B - (context->vfd_contrast - 1) / 250)
- : 0x2B;
- break;
- case 1:
- memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8);
- break;
- case 2:
- memcpy(context->usb_tx_buf, "\x0b\x01\0\0\0\0\0\0", 8);
- break;
- case 3:
- memcpy(context->usb_tx_buf, context->tx.data_buf, 8);
- break;
- case 4:
- memcpy(context->usb_tx_buf,
- context->tx.data_buf + 8, 8);
- break;
- case 5:
- memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8);
- break;
- case 6:
- memcpy(context->usb_tx_buf, "\x0b\x02\0\0\0\0\0\0", 8);
- break;
- case 7:
- memcpy(context->usb_tx_buf,
- context->tx.data_buf + 16, 8);
- break;
- case 8:
- memcpy(context->usb_tx_buf,
- context->tx.data_buf + 24, 8);
- break;
- }
- retval = send_packet(context);
- if (retval) {
- dev_err(&context->dev->dev,
- "send packet failed for packet #%d\n", i);
- goto exit;
- }
- }
-exit:
-
- mutex_unlock(&context->ctx_lock);
- kfree(data_buf);
-
- return (!retval) ? n_bytes : retval;
-}
-
-/**
- * Callback function for USB core API: transmit data
- */
-static void usb_tx_callback(struct urb *urb)
-{
- struct sasem_context *context;
-
- if (!urb)
- return;
- context = (struct sasem_context *) urb->context;
- if (!context)
- return;
-
- context->tx.status = urb->status;
-
- /* notify waiters that write has finished */
- atomic_set(&context->tx.busy, 0);
- complete(&context->tx.finished);
-}
-
-/**
- * Called by lirc_dev when the application opens /dev/lirc
- */
-static int ir_open(void *data)
-{
- int retval = 0;
- struct sasem_context *context;
-
- /* prevent races with disconnect */
- mutex_lock(&disconnect_lock);
-
- context = data;
-
- mutex_lock(&context->ctx_lock);
-
- if (context->ir_isopen) {
- dev_err(&context->dev->dev, "%s: IR port is already open\n",
- __func__);
- retval = -EBUSY;
- goto exit;
- }
-
- usb_fill_int_urb(context->rx_urb, context->dev,
- usb_rcvintpipe(context->dev,
- context->rx_endpoint->bEndpointAddress),
- context->usb_rx_buf, sizeof(context->usb_rx_buf),
- usb_rx_callback, context, context->rx_endpoint->bInterval);
-
- retval = usb_submit_urb(context->rx_urb, GFP_KERNEL);
-
- if (retval)
- dev_err(&context->dev->dev,
- "usb_submit_urb failed for ir_open (%d)\n", retval);
- else {
- context->ir_isopen = 1;
- dev_info(&context->dev->dev, "IR port opened\n");
- }
-
-exit:
- mutex_unlock(&context->ctx_lock);
-
- mutex_unlock(&disconnect_lock);
- return retval;
-}
-
-/**
- * Called by lirc_dev when the application closes /dev/lirc
- */
-static void ir_close(void *data)
-{
- struct sasem_context *context;
-
- context = data;
- if (!context) {
- pr_err("%s: no context for device\n", __func__);
- return;
- }
-
- mutex_lock(&context->ctx_lock);
-
- usb_kill_urb(context->rx_urb);
- context->ir_isopen = 0;
- pr_info("IR port closed\n");
-
- if (!context->dev_present) {
-
- /*
- * Device disconnected while IR port was
- * still open. Driver was not deregistered
- * at disconnect time, so do it now.
- */
- deregister_from_lirc(context);
- if (!context->vfd_isopen) {
- mutex_unlock(&context->ctx_lock);
- delete_context(context);
- return;
- }
- /* If VFD port is open, context will be deleted by vfd_close */
- }
-
- mutex_unlock(&context->ctx_lock);
-}
-
-/**
- * Process the incoming packet
- */
-static void incoming_packet(struct sasem_context *context,
- struct urb *urb)
-{
- int len = urb->actual_length;
- unsigned char *buf = urb->transfer_buffer;
- u64 ns;
- ktime_t kt;
-
- if (len != 8) {
- dev_warn(&context->dev->dev,
- "%s: invalid incoming packet size (%d)\n",
- __func__, len);
- return;
- }
-
- if (debug)
- dev_info(&context->dev->dev, "Incoming data: %*ph\n", len, buf);
- /*
- * Lirc could deal with the repeat code, but we really need to block it
- * if it arrives too late. Otherwise we could repeat the wrong code.
- */
-
- /* get the time since the last button press */
- kt = ktime_get();
- ns = ktime_to_ns(ktime_sub(kt, context->presstime));
-
- if (memcmp(buf, "\x08\0\0\0\0\0\0\0", 8) == 0) {
- /*
- * the repeat code is being sent, so we copy
- * the old code to LIRC
- */
-
- /*
- * NOTE: Only if the last code was less than 250ms ago
- * - no one should be able to push another (undetected) button
- * in that time and then get a false repeat of the previous
- * press but it is long enough for a genuine repeat
- */
- if ((ns < 250 * NSEC_PER_MSEC) && (context->codesaved != 0)) {
- memcpy(buf, &context->lastcode, 8);
- context->presstime = kt;
- }
- } else {
- /* save the current valid code for repeats */
- memcpy(&context->lastcode, buf, 8);
- /*
- * set flag to signal a valid code was save;
- * just for safety reasons
- */
- context->codesaved = 1;
- context->presstime = kt;
- }
-
- lirc_buffer_write(context->driver->rbuf, buf);
- wake_up(&context->driver->rbuf->wait_poll);
-}
-
-/**
- * Callback function for USB core API: receive data
- */
-static void usb_rx_callback(struct urb *urb)
-{
- struct sasem_context *context;
-
- if (!urb)
- return;
- context = (struct sasem_context *) urb->context;
- if (!context)
- return;
-
- switch (urb->status) {
- case -ENOENT: /* usbcore unlink successful! */
- return;
-
- case 0:
- if (context->ir_isopen)
- incoming_packet(context, urb);
- break;
-
- default:
- dev_warn(&urb->dev->dev, "%s: status (%d): ignored",
- __func__, urb->status);
- break;
- }
-
- usb_submit_urb(context->rx_urb, GFP_ATOMIC);
-}
-
-/**
- * Callback function for USB core API: Probe
- */
-static int sasem_probe(struct usb_interface *interface,
- const struct usb_device_id *id)
-{
- struct usb_device *dev = NULL;
- struct usb_host_interface *iface_desc = NULL;
- struct usb_endpoint_descriptor *rx_endpoint = NULL;
- struct usb_endpoint_descriptor *tx_endpoint = NULL;
- struct urb *rx_urb = NULL;
- struct urb *tx_urb = NULL;
- struct lirc_driver *driver = NULL;
- struct lirc_buffer *rbuf = NULL;
- int lirc_minor = 0;
- int num_endpoints;
- int retval = 0;
- int vfd_ep_found;
- int ir_ep_found;
- int alloc_status;
- struct sasem_context *context = NULL;
- int i;
-
- dev_info(&interface->dev, "%s: found Sasem device\n", __func__);
-
-
- dev = usb_get_dev(interface_to_usbdev(interface));
- iface_desc = interface->cur_altsetting;
- num_endpoints = iface_desc->desc.bNumEndpoints;
-
- /*
- * Scan the endpoint list and set:
- * first input endpoint = IR endpoint
- * first output endpoint = VFD endpoint
- */
-
- ir_ep_found = 0;
- vfd_ep_found = 0;
-
- for (i = 0; i < num_endpoints && !(ir_ep_found && vfd_ep_found); ++i) {
-
- struct usb_endpoint_descriptor *ep;
-
- ep = &iface_desc->endpoint [i].desc;
-
- if (!ir_ep_found &&
- usb_endpoint_is_int_in(ep)) {
-
- rx_endpoint = ep;
- ir_ep_found = 1;
- if (debug)
- dev_info(&interface->dev,
- "%s: found IR endpoint\n", __func__);
-
- } else if (!vfd_ep_found &&
- usb_endpoint_is_int_out(ep)) {
- tx_endpoint = ep;
- vfd_ep_found = 1;
- if (debug)
- dev_info(&interface->dev,
- "%s: found VFD endpoint\n", __func__);
- }
- }
-
- /* Input endpoint is mandatory */
- if (!ir_ep_found) {
- dev_err(&interface->dev,
- "%s: no valid input (IR) endpoint found.\n", __func__);
- retval = -ENODEV;
- goto exit;
- }
-
- if (!vfd_ep_found)
- dev_info(&interface->dev,
- "%s: no valid output (VFD) endpoint found.\n",
- __func__);
-
-
- /* Allocate memory */
- alloc_status = 0;
-
- context = kzalloc(sizeof(*context), GFP_KERNEL);
- if (!context) {
- alloc_status = 1;
- goto alloc_status_switch;
- }
- driver = kzalloc(sizeof(*driver), GFP_KERNEL);
- if (!driver) {
- alloc_status = 2;
- goto alloc_status_switch;
- }
- rbuf = kmalloc(sizeof(*rbuf), GFP_KERNEL);
- if (!rbuf) {
- alloc_status = 3;
- goto alloc_status_switch;
- }
- if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) {
- dev_err(&interface->dev,
- "%s: lirc_buffer_init failed\n", __func__);
- alloc_status = 4;
- goto alloc_status_switch;
- }
- rx_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!rx_urb) {
- alloc_status = 5;
- goto alloc_status_switch;
- }
- if (vfd_ep_found) {
- tx_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!tx_urb) {
- alloc_status = 6;
- goto alloc_status_switch;
- }
- }
-
- mutex_init(&context->ctx_lock);
-
- strcpy(driver->name, MOD_NAME);
- driver->minor = -1;
- driver->code_length = 64;
- driver->sample_rate = 0;
- driver->features = LIRC_CAN_REC_LIRCCODE;
- driver->data = context;
- driver->rbuf = rbuf;
- driver->set_use_inc = ir_open;
- driver->set_use_dec = ir_close;
- driver->dev = &interface->dev;
- driver->owner = THIS_MODULE;
-
- mutex_lock(&context->ctx_lock);
-
- lirc_minor = lirc_register_driver(driver);
- if (lirc_minor < 0) {
- dev_err(&interface->dev,
- "%s: lirc_register_driver failed\n", __func__);
- alloc_status = 7;
- retval = lirc_minor;
- goto unlock;
- } else
- dev_info(&interface->dev,
- "%s: Registered Sasem driver (minor:%d)\n",
- __func__, lirc_minor);
-
- /* Needed while unregistering! */
- driver->minor = lirc_minor;
-
- context->dev = dev;
- context->dev_present = 1;
- context->rx_endpoint = rx_endpoint;
- context->rx_urb = rx_urb;
- if (vfd_ep_found) {
- context->tx_endpoint = tx_endpoint;
- context->tx_urb = tx_urb;
- context->vfd_contrast = 1000; /* range 0 - 1000 */
- }
- context->driver = driver;
-
- usb_set_intfdata(interface, context);
-
- if (vfd_ep_found) {
-
- if (debug)
- dev_info(&interface->dev,
- "Registering VFD with sysfs\n");
- if (usb_register_dev(interface, &sasem_class))
- /* Not a fatal error, so ignore */
- dev_info(&interface->dev,
- "%s: could not get a minor number for VFD\n",
- __func__);
- }
-
- dev_info(&interface->dev,
- "%s: Sasem device on usb<%d:%d> initialized\n",
- __func__, dev->bus->busnum, dev->devnum);
-unlock:
- mutex_unlock(&context->ctx_lock);
-
-alloc_status_switch:
- switch (alloc_status) {
-
- case 7:
- if (vfd_ep_found)
- usb_free_urb(tx_urb);
- case 6:
- usb_free_urb(rx_urb);
- /* fall-through */
- case 5:
- lirc_buffer_free(rbuf);
- /* fall-through */
- case 4:
- kfree(rbuf);
- /* fall-through */
- case 3:
- kfree(driver);
- /* fall-through */
- case 2:
- kfree(context);
- context = NULL;
- /* fall-through */
- case 1:
- if (retval == 0)
- retval = -ENOMEM;
- }
-
-exit:
- return retval;
-}
-
-/**
- * Callback function for USB core API: disconnect
- */
-static void sasem_disconnect(struct usb_interface *interface)
-{
- struct sasem_context *context;
-
- /* prevent races with ir_open()/vfd_open() */
- mutex_lock(&disconnect_lock);
-
- context = usb_get_intfdata(interface);
- mutex_lock(&context->ctx_lock);
-
- dev_info(&interface->dev, "%s: Sasem device disconnected\n",
- __func__);
-
- usb_set_intfdata(interface, NULL);
- context->dev_present = 0;
-
- /* Stop reception */
- usb_kill_urb(context->rx_urb);
-
- /* Abort ongoing write */
- if (atomic_read(&context->tx.busy)) {
-
- usb_kill_urb(context->tx_urb);
- wait_for_completion(&context->tx.finished);
- }
-
- /* De-register from lirc_dev if IR port is not open */
- if (!context->ir_isopen)
- deregister_from_lirc(context);
-
- usb_deregister_dev(interface, &sasem_class);
-
- mutex_unlock(&context->ctx_lock);
-
- if (!context->ir_isopen && !context->vfd_isopen)
- delete_context(context);
-
- mutex_unlock(&disconnect_lock);
-}
-
-module_usb_driver(sasem_driver);
projects / platform / kernel / linux-rpi.git / commitdiff