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/utsname.h>
18 #include <linux/module.h>
21 #if defined USB_ETH_RNDIS
24 #ifdef CONFIG_USB_G_MULTI_RNDIS
25 # define USB_ETH_RNDIS y
29 #define DRIVER_DESC "Multifunction Composite Gadget"
31 MODULE_DESCRIPTION(DRIVER_DESC);
32 MODULE_AUTHOR("Michal Nazarewicz");
33 MODULE_LICENSE("GPL");
36 /***************************** All the files... *****************************/
39 * kbuild is not very cooperative with respect to linking separately
40 * compiled library objects into one module. So for now we won't use
41 * separate compilation ... ensuring init/exit sections work to shrink
42 * the runtime footprint, and giving us at least some parts of what
43 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
46 #include "composite.c"
48 #include "epautoconf.c"
50 #include "f_mass_storage.c"
65 /***************************** Device Descriptor ****************************/
67 #define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
68 #define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
73 #ifdef CONFIG_USB_G_MULTI_RNDIS
74 MULTI_RNDIS_CONFIG_NUM,
76 #ifdef CONFIG_USB_G_MULTI_CDC
82 static struct usb_device_descriptor device_desc = {
83 .bLength = sizeof device_desc,
84 .bDescriptorType = USB_DT_DEVICE,
86 .bcdUSB = cpu_to_le16(0x0200),
88 .bDeviceClass = USB_CLASS_MISC /* 0xEF */,
92 /* Vendor and product id can be overridden by module parameters. */
93 .idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
94 .idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
98 static const struct usb_descriptor_header *otg_desc[] = {
99 (struct usb_descriptor_header *) &(struct usb_otg_descriptor){
100 .bLength = sizeof(struct usb_otg_descriptor),
101 .bDescriptorType = USB_DT_OTG,
104 * REVISIT SRP-only hardware is possible, although
105 * it would not be called "OTG" ...
107 .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
114 #ifdef CONFIG_USB_G_MULTI_RNDIS
115 MULTI_STRING_RNDIS_CONFIG_IDX,
117 #ifdef CONFIG_USB_G_MULTI_CDC
118 MULTI_STRING_CDC_CONFIG_IDX,
122 static struct usb_string strings_dev[] = {
123 #ifdef CONFIG_USB_G_MULTI_RNDIS
124 [MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
126 #ifdef CONFIG_USB_G_MULTI_CDC
127 [MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
129 { } /* end of list */
132 static struct usb_gadget_strings *dev_strings[] = {
133 &(struct usb_gadget_strings){
134 .language = 0x0409, /* en-us */
135 .strings = strings_dev,
143 /****************************** Configurations ******************************/
145 static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
146 FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
148 static struct fsg_common fsg_common;
150 static u8 hostaddr[ETH_ALEN];
153 /********** RNDIS **********/
157 static __init int rndis_do_config(struct usb_configuration *c)
161 if (gadget_is_otg(c->cdev->gadget)) {
162 c->descriptors = otg_desc;
163 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
166 ret = rndis_bind_config(c, hostaddr);
170 ret = acm_bind_config(c, 0);
174 ret = fsg_bind_config(c->cdev, c, &fsg_common);
181 static int rndis_config_register(struct usb_composite_dev *cdev)
183 static struct usb_configuration config = {
184 .bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
185 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
188 config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
189 config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
191 return usb_add_config(cdev, &config, rndis_do_config);
196 static int rndis_config_register(struct usb_composite_dev *cdev)
204 /********** CDC ECM **********/
206 #ifdef CONFIG_USB_G_MULTI_CDC
208 static __init int cdc_do_config(struct usb_configuration *c)
212 if (gadget_is_otg(c->cdev->gadget)) {
213 c->descriptors = otg_desc;
214 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
217 ret = ecm_bind_config(c, hostaddr);
221 ret = acm_bind_config(c, 0);
225 ret = fsg_bind_config(c->cdev, c, &fsg_common);
232 static int cdc_config_register(struct usb_composite_dev *cdev)
234 static struct usb_configuration config = {
235 .bConfigurationValue = MULTI_CDC_CONFIG_NUM,
236 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
239 config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
240 config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
242 return usb_add_config(cdev, &config, cdc_do_config);
247 static int cdc_config_register(struct usb_composite_dev *cdev)
256 /****************************** Gadget Bind ******************************/
259 static int __ref multi_bind(struct usb_composite_dev *cdev)
261 struct usb_gadget *gadget = cdev->gadget;
264 if (!can_support_ecm(cdev->gadget)) {
265 dev_err(&gadget->dev, "controller '%s' not usable\n",
270 /* set up network link layer */
271 status = gether_setup(cdev->gadget, hostaddr);
275 /* set up serial link layer */
276 status = gserial_setup(cdev->gadget, 1);
280 /* set up mass storage function */
283 retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data);
285 status = PTR_ERR(retp);
291 gcnum = usb_gadget_controller_number(gadget);
293 device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
295 WARNING(cdev, "controller '%s' not recognized\n", gadget->name);
296 device_desc.bcdDevice = cpu_to_le16(0x0300 | 0x0099);
299 /* allocate string IDs */
300 status = usb_string_ids_tab(cdev, strings_dev);
301 if (unlikely(status < 0))
304 /* register configurations */
305 status = rndis_config_register(cdev);
306 if (unlikely(status < 0))
309 status = cdc_config_register(cdev);
310 if (unlikely(status < 0))
314 dev_info(&gadget->dev, DRIVER_DESC "\n");
315 fsg_common_put(&fsg_common);
321 fsg_common_put(&fsg_common);
329 static int __exit multi_unbind(struct usb_composite_dev *cdev)
337 /****************************** Some noise ******************************/
340 static __refdata struct usb_composite_driver multi_driver = {
343 .strings = dev_strings,
344 .max_speed = USB_SPEED_HIGH,
346 .unbind = __exit_p(multi_unbind),
347 .iProduct = DRIVER_DESC,
352 static int __init multi_init(void)
354 return usb_composite_probe(&multi_driver);
356 module_init(multi_init);
358 static void __exit multi_exit(void)
360 usb_composite_unregister(&multi_driver);
362 module_exit(multi_exit);