2 * multi.c -- Multifunction Composite driver
4 * Copyright (C) 2008 David Brownell
5 * Copyright (C) 2008 Nokia Corporation
6 * Copyright (C) 2009 Samsung Electronics
7 * Author: Michal Nazarewicz (mina86@mina86.com)
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/module.h>
19 #if defined USB_ETH_RNDIS
22 #ifdef CONFIG_USB_G_MULTI_RNDIS
23 # define USB_ETH_RNDIS y
27 #define DRIVER_DESC "Multifunction Composite Gadget"
29 MODULE_DESCRIPTION(DRIVER_DESC);
30 MODULE_AUTHOR("Michal Nazarewicz");
31 MODULE_LICENSE("GPL");
34 /***************************** All the files... *****************************/
37 * kbuild is not very cooperative with respect to linking separately
38 * compiled library objects into one module. So for now we won't use
39 * separate compilation ... ensuring init/exit sections work to shrink
40 * the runtime footprint, and giving us at least some parts of what
41 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
43 #include "f_mass_storage.c"
56 USB_GADGET_COMPOSITE_OPTIONS();
58 /***************************** Device Descriptor ****************************/
60 #define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
61 #define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
66 #ifdef CONFIG_USB_G_MULTI_RNDIS
67 MULTI_RNDIS_CONFIG_NUM,
69 #ifdef CONFIG_USB_G_MULTI_CDC
75 static struct usb_device_descriptor device_desc = {
76 .bLength = sizeof device_desc,
77 .bDescriptorType = USB_DT_DEVICE,
79 .bcdUSB = cpu_to_le16(0x0200),
81 .bDeviceClass = USB_CLASS_MISC /* 0xEF */,
85 /* Vendor and product id can be overridden by module parameters. */
86 .idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
87 .idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
91 static const struct usb_descriptor_header *otg_desc[] = {
92 (struct usb_descriptor_header *) &(struct usb_otg_descriptor){
93 .bLength = sizeof(struct usb_otg_descriptor),
94 .bDescriptorType = USB_DT_OTG,
97 * REVISIT SRP-only hardware is possible, although
98 * it would not be called "OTG" ...
100 .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
107 MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
108 MULTI_STRING_CDC_CONFIG_IDX,
111 static struct usb_string strings_dev[] = {
112 [USB_GADGET_MANUFACTURER_IDX].s = "",
113 [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
114 [USB_GADGET_SERIAL_IDX].s = "",
115 [MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
116 [MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
117 { } /* end of list */
120 static struct usb_gadget_strings *dev_strings[] = {
121 &(struct usb_gadget_strings){
122 .language = 0x0409, /* en-us */
123 .strings = strings_dev,
131 /****************************** Configurations ******************************/
133 static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
134 FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
136 static struct fsg_common fsg_common;
138 static u8 hostaddr[ETH_ALEN];
141 /********** RNDIS **********/
145 static __init int rndis_do_config(struct usb_configuration *c)
149 if (gadget_is_otg(c->cdev->gadget)) {
150 c->descriptors = otg_desc;
151 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
154 ret = rndis_bind_config(c, hostaddr);
158 ret = acm_bind_config(c, 0);
162 ret = fsg_bind_config(c->cdev, c, &fsg_common);
169 static int rndis_config_register(struct usb_composite_dev *cdev)
171 static struct usb_configuration config = {
172 .bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
173 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
176 config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
177 config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
179 return usb_add_config(cdev, &config, rndis_do_config);
184 static int rndis_config_register(struct usb_composite_dev *cdev)
192 /********** CDC ECM **********/
194 #ifdef CONFIG_USB_G_MULTI_CDC
196 static __init int cdc_do_config(struct usb_configuration *c)
200 if (gadget_is_otg(c->cdev->gadget)) {
201 c->descriptors = otg_desc;
202 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
205 ret = ecm_bind_config(c, hostaddr);
209 ret = acm_bind_config(c, 0);
213 ret = fsg_bind_config(c->cdev, c, &fsg_common);
220 static int cdc_config_register(struct usb_composite_dev *cdev)
222 static struct usb_configuration config = {
223 .bConfigurationValue = MULTI_CDC_CONFIG_NUM,
224 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
227 config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
228 config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
230 return usb_add_config(cdev, &config, cdc_do_config);
235 static int cdc_config_register(struct usb_composite_dev *cdev)
244 /****************************** Gadget Bind ******************************/
247 static int __ref multi_bind(struct usb_composite_dev *cdev)
249 struct usb_gadget *gadget = cdev->gadget;
252 if (!can_support_ecm(cdev->gadget)) {
253 dev_err(&gadget->dev, "controller '%s' not usable\n",
258 /* set up network link layer */
259 status = gether_setup(cdev->gadget, hostaddr);
263 /* set up serial link layer */
264 status = gserial_setup(cdev->gadget, 1);
268 /* set up mass storage function */
271 retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data);
273 status = PTR_ERR(retp);
278 /* allocate string IDs */
279 status = usb_string_ids_tab(cdev, strings_dev);
280 if (unlikely(status < 0))
282 device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
284 /* register configurations */
285 status = rndis_config_register(cdev);
286 if (unlikely(status < 0))
289 status = cdc_config_register(cdev);
290 if (unlikely(status < 0))
292 usb_composite_overwrite_options(cdev, &coverwrite);
295 dev_info(&gadget->dev, DRIVER_DESC "\n");
296 fsg_common_put(&fsg_common);
302 fsg_common_put(&fsg_common);
310 static int __exit multi_unbind(struct usb_composite_dev *cdev)
318 /****************************** Some noise ******************************/
321 static __refdata struct usb_composite_driver multi_driver = {
324 .strings = dev_strings,
325 .max_speed = USB_SPEED_HIGH,
327 .unbind = __exit_p(multi_unbind),
332 static int __init multi_init(void)
334 return usb_composite_probe(&multi_driver);
336 module_init(multi_init);
338 static void __exit multi_exit(void)
340 usb_composite_unregister(&multi_driver);
342 module_exit(multi_exit);