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 (m.nazarewicz@samsung.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.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/kernel.h>
26 #include <linux/utsname.h>
27 #include <linux/module.h>
30 #if defined USB_ETH_RNDIS
33 #ifdef CONFIG_USB_G_MULTI_RNDIS
34 # define USB_ETH_RNDIS y
38 #define DRIVER_DESC "Multifunction Composite Gadget"
40 MODULE_DESCRIPTION(DRIVER_DESC);
41 MODULE_AUTHOR("Michal Nazarewicz");
42 MODULE_LICENSE("GPL");
45 /***************************** All the files... *****************************/
48 * kbuild is not very cooperative with respect to linking separately
49 * compiled library objects into one module. So for now we won't use
50 * separate compilation ... ensuring init/exit sections work to shrink
51 * the runtime footprint, and giving us at least some parts of what
52 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
55 #include "composite.c"
56 #include "usbstring.c"
58 #include "epautoconf.c"
60 #include "f_mass_storage.c"
75 /***************************** Device Descriptor ****************************/
77 #define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
78 #define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
83 #ifdef CONFIG_USB_G_MULTI_RNDIS
84 MULTI_RNDIS_CONFIG_NUM,
86 #ifdef CONFIG_USB_G_MULTI_CDC
92 static struct usb_device_descriptor device_desc = {
93 .bLength = sizeof device_desc,
94 .bDescriptorType = USB_DT_DEVICE,
96 .bcdUSB = cpu_to_le16(0x0200),
98 .bDeviceClass = USB_CLASS_MISC /* 0xEF */,
100 .bDeviceProtocol = 1,
102 /* Vendor and product id can be overridden by module parameters. */
103 .idVendor = cpu_to_le16(MULTI_VENDOR_NUM),
104 .idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
108 static const struct usb_descriptor_header *otg_desc[] = {
109 (struct usb_descriptor_header *) &(struct usb_otg_descriptor){
110 .bLength = sizeof(struct usb_otg_descriptor),
111 .bDescriptorType = USB_DT_OTG,
114 * REVISIT SRP-only hardware is possible, although
115 * it would not be called "OTG" ...
117 .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
124 #ifdef CONFIG_USB_G_MULTI_RNDIS
125 MULTI_STRING_RNDIS_CONFIG_IDX,
127 #ifdef CONFIG_USB_G_MULTI_CDC
128 MULTI_STRING_CDC_CONFIG_IDX,
132 static struct usb_string strings_dev[] = {
133 #ifdef CONFIG_USB_G_MULTI_RNDIS
134 [MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
136 #ifdef CONFIG_USB_G_MULTI_CDC
137 [MULTI_STRING_CDC_CONFIG_IDX].s = "Multifunction with CDC ECM",
139 { } /* end of list */
142 static struct usb_gadget_strings *dev_strings[] = {
143 &(struct usb_gadget_strings){
144 .language = 0x0409, /* en-us */
145 .strings = strings_dev,
153 /****************************** Configurations ******************************/
155 static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
156 FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
158 static struct fsg_common fsg_common;
160 static u8 hostaddr[ETH_ALEN];
163 /********** RNDIS **********/
167 static __init int rndis_do_config(struct usb_configuration *c)
171 if (gadget_is_otg(c->cdev->gadget)) {
172 c->descriptors = otg_desc;
173 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
176 ret = rndis_bind_config(c, hostaddr);
180 ret = acm_bind_config(c, 0);
184 ret = fsg_bind_config(c->cdev, c, &fsg_common);
191 static int rndis_config_register(struct usb_composite_dev *cdev)
193 static struct usb_configuration config = {
194 .bConfigurationValue = MULTI_RNDIS_CONFIG_NUM,
195 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
198 config.label = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
199 config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
201 return usb_add_config(cdev, &config, rndis_do_config);
206 static int rndis_config_register(struct usb_composite_dev *cdev)
214 /********** CDC ECM **********/
216 #ifdef CONFIG_USB_G_MULTI_CDC
218 static __init int cdc_do_config(struct usb_configuration *c)
222 if (gadget_is_otg(c->cdev->gadget)) {
223 c->descriptors = otg_desc;
224 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
227 ret = ecm_bind_config(c, hostaddr);
231 ret = acm_bind_config(c, 0);
235 ret = fsg_bind_config(c->cdev, c, &fsg_common);
242 static int cdc_config_register(struct usb_composite_dev *cdev)
244 static struct usb_configuration config = {
245 .bConfigurationValue = MULTI_CDC_CONFIG_NUM,
246 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
249 config.label = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
250 config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
252 return usb_add_config(cdev, &config, cdc_do_config);
257 static int cdc_config_register(struct usb_composite_dev *cdev)
266 /****************************** Gadget Bind ******************************/
269 static int __ref multi_bind(struct usb_composite_dev *cdev)
271 struct usb_gadget *gadget = cdev->gadget;
274 if (!can_support_ecm(cdev->gadget)) {
275 dev_err(&gadget->dev, "controller '%s' not usable\n",
280 /* set up network link layer */
281 status = gether_setup(cdev->gadget, hostaddr);
285 /* set up serial link layer */
286 status = gserial_setup(cdev->gadget, 1);
290 /* set up mass storage function */
293 retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data);
295 status = PTR_ERR(retp);
301 gcnum = usb_gadget_controller_number(gadget);
303 device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
305 WARNING(cdev, "controller '%s' not recognized\n", gadget->name);
306 device_desc.bcdDevice = cpu_to_le16(0x0300 | 0x0099);
309 /* allocate string IDs */
310 status = usb_string_ids_tab(cdev, strings_dev);
311 if (unlikely(status < 0))
314 /* register configurations */
315 status = rndis_config_register(cdev);
316 if (unlikely(status < 0))
319 status = cdc_config_register(cdev);
320 if (unlikely(status < 0))
324 dev_info(&gadget->dev, DRIVER_DESC "\n");
325 fsg_common_put(&fsg_common);
331 fsg_common_put(&fsg_common);
339 static int __exit multi_unbind(struct usb_composite_dev *cdev)
347 /****************************** Some noise ******************************/
350 static struct usb_composite_driver multi_driver = {
353 .strings = dev_strings,
354 .unbind = __exit_p(multi_unbind),
355 .iProduct = DRIVER_DESC,
360 static int __init multi_init(void)
362 return usb_composite_probe(&multi_driver, multi_bind);
364 module_init(multi_init);
366 static void __exit multi_exit(void)
368 usb_composite_unregister(&multi_driver);
370 module_exit(multi_exit);