Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * ether.c -- Ethernet gadget driver, with CDC and non-CDC options | |
3 | * | |
0391c828 | 4 | * Copyright (C) 2003-2005,2008 David Brownell |
1da177e4 | 5 | * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger |
0391c828 | 6 | * Copyright (C) 2008 Nokia Corporation |
1da177e4 LT |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
1da177e4 LT |
12 | */ |
13 | ||
0cf4f2de | 14 | /* #define VERBOSE_DEBUG */ |
1da177e4 | 15 | |
1da177e4 | 16 | #include <linux/kernel.h> |
8af5232d | 17 | #include <linux/netdevice.h> |
396cda90 MN |
18 | |
19 | #if defined USB_ETH_RNDIS | |
20 | # undef USB_ETH_RNDIS | |
21 | #endif | |
22 | #ifdef CONFIG_USB_ETH_RNDIS | |
23 | # define USB_ETH_RNDIS y | |
24 | #endif | |
25 | ||
0391c828 | 26 | #include "u_ether.h" |
1da177e4 | 27 | |
1da177e4 LT |
28 | |
29 | /* | |
30 | * Ethernet gadget driver -- with CDC and non-CDC options | |
31 | * Builds on hardware support for a full duplex link. | |
32 | * | |
33 | * CDC Ethernet is the standard USB solution for sending Ethernet frames | |
34 | * using USB. Real hardware tends to use the same framing protocol but look | |
35 | * different for control features. This driver strongly prefers to use | |
36 | * this USB-IF standard as its open-systems interoperability solution; | |
37 | * most host side USB stacks (except from Microsoft) support it. | |
38 | * | |
0391c828 DB |
39 | * This is sometimes called "CDC ECM" (Ethernet Control Model) to support |
40 | * TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new | |
41 | * "CDC EEM" (Ethernet Emulation Model) is starting to spread. | |
42 | * | |
43 | * There's some hardware that can't talk CDC ECM. We make that hardware | |
1da177e4 | 44 | * implement a "minimalist" vendor-agnostic CDC core: same framing, but |
11d54898 DB |
45 | * link-level setup only requires activating the configuration. Only the |
46 | * endpoint descriptors, and product/vendor IDs, are relevant; no control | |
47 | * operations are available. Linux supports it, but other host operating | |
48 | * systems may not. (This is a subset of CDC Ethernet.) | |
49 | * | |
50 | * It turns out that if you add a few descriptors to that "CDC Subset", | |
51 | * (Windows) host side drivers from MCCI can treat it as one submode of | |
52 | * a proprietary scheme called "SAFE" ... without needing to know about | |
53 | * specific product/vendor IDs. So we do that, making it easier to use | |
54 | * those MS-Windows drivers. Those added descriptors make it resemble a | |
55 | * CDC MDLM device, but they don't change device behavior at all. (See | |
56 | * MCCI Engineering report 950198 "SAFE Networking Functions".) | |
1da177e4 LT |
57 | * |
58 | * A third option is also in use. Rather than CDC Ethernet, or something | |
59 | * simpler, Microsoft pushes their own approach: RNDIS. The published | |
60 | * RNDIS specs are ambiguous and appear to be incomplete, and are also | |
0391c828 | 61 | * needlessly complex. They borrow more from CDC ACM than CDC ECM. |
1da177e4 LT |
62 | */ |
63 | ||
64 | #define DRIVER_DESC "Ethernet Gadget" | |
0391c828 | 65 | #define DRIVER_VERSION "Memorial Day 2008" |
1da177e4 | 66 | |
396cda90 | 67 | #ifdef USB_ETH_RNDIS |
0391c828 DB |
68 | #define PREFIX "RNDIS/" |
69 | #else | |
70 | #define PREFIX "" | |
1da177e4 LT |
71 | #endif |
72 | ||
0391c828 DB |
73 | /* |
74 | * This driver aims for interoperability by using CDC ECM unless | |
75 | * | |
76 | * can_support_ecm() | |
1da177e4 | 77 | * |
0391c828 DB |
78 | * returns false, in which case it supports the CDC Subset. By default, |
79 | * that returns true; most hardware has no problems with CDC ECM, that's | |
80 | * a good default. Previous versions of this driver had no default; this | |
81 | * version changes that, removing overhead for new controller support. | |
82 | * | |
83 | * IF YOUR HARDWARE CAN'T SUPPORT CDC ECM, UPDATE THAT ROUTINE! | |
1da177e4 | 84 | */ |
1da177e4 | 85 | |
0391c828 DB |
86 | static inline bool has_rndis(void) |
87 | { | |
396cda90 | 88 | #ifdef USB_ETH_RNDIS |
0391c828 DB |
89 | return true; |
90 | #else | |
91 | return false; | |
92 | #endif | |
93 | } | |
94 | ||
cbbd14a9 AP |
95 | #include <linux/module.h> |
96 | ||
9c62ce83 | 97 | #include "u_ecm.h" |
8af5232d | 98 | #include "u_gether.h" |
396cda90 | 99 | #ifdef USB_ETH_RNDIS |
9bd4a10e | 100 | #include "u_rndis.h" |
cbbd14a9 | 101 | #include "rndis.h" |
9bd4a10e AP |
102 | #else |
103 | #define rndis_borrow_net(...) do {} while (0) | |
33376c1c | 104 | #endif |
94b5573e | 105 | #include "u_eem.h" |
33376c1c DB |
106 | |
107 | /*-------------------------------------------------------------------------*/ | |
7d16e8d3 | 108 | USB_GADGET_COMPOSITE_OPTIONS(); |
33376c1c | 109 | |
f1a1823f AP |
110 | USB_ETHERNET_MODULE_PARAMETERS(); |
111 | ||
1da177e4 LT |
112 | /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! |
113 | * Instead: allocate your own, using normal USB-IF procedures. | |
114 | */ | |
115 | ||
116 | /* Thanks to NetChip Technologies for donating this product ID. | |
117 | * It's for devices with only CDC Ethernet configurations. | |
118 | */ | |
0391c828 DB |
119 | #define CDC_VENDOR_NUM 0x0525 /* NetChip */ |
120 | #define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */ | |
1da177e4 LT |
121 | |
122 | /* For hardware that can't talk CDC, we use the same vendor ID that | |
123 | * ARM Linux has used for ethernet-over-usb, both with sa1100 and | |
124 | * with pxa250. We're protocol-compatible, if the host-side drivers | |
125 | * use the endpoint descriptors. bcdDevice (version) is nonzero, so | |
126 | * drivers that need to hard-wire endpoint numbers have a hook. | |
127 | * | |
128 | * The protocol is a minimal subset of CDC Ether, which works on any bulk | |
129 | * hardware that's not deeply broken ... even on hardware that can't talk | |
130 | * RNDIS (like SA-1100, with no interrupt endpoint, or anything that | |
131 | * doesn't handle control-OUT). | |
132 | */ | |
133 | #define SIMPLE_VENDOR_NUM 0x049f | |
134 | #define SIMPLE_PRODUCT_NUM 0x505a | |
135 | ||
136 | /* For hardware that can talk RNDIS and either of the above protocols, | |
137 | * use this ID ... the windows INF files will know it. Unless it's | |
138 | * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose | |
139 | * the non-RNDIS configuration. | |
140 | */ | |
141 | #define RNDIS_VENDOR_NUM 0x0525 /* NetChip */ | |
142 | #define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */ | |
143 | ||
9b39e9dd | 144 | /* For EEM gadgets */ |
4238ef54 BN |
145 | #define EEM_VENDOR_NUM 0x1d6b /* Linux Foundation */ |
146 | #define EEM_PRODUCT_NUM 0x0102 /* EEM Gadget */ | |
9b39e9dd | 147 | |
1da177e4 LT |
148 | /*-------------------------------------------------------------------------*/ |
149 | ||
0391c828 | 150 | static struct usb_device_descriptor device_desc = { |
1da177e4 LT |
151 | .bLength = sizeof device_desc, |
152 | .bDescriptorType = USB_DT_DEVICE, | |
153 | ||
0aecfc1b | 154 | /* .bcdUSB = DYNAMIC */ |
1da177e4 LT |
155 | |
156 | .bDeviceClass = USB_CLASS_COMM, | |
157 | .bDeviceSubClass = 0, | |
158 | .bDeviceProtocol = 0, | |
0391c828 | 159 | /* .bMaxPacketSize0 = f(hardware) */ |
1da177e4 | 160 | |
0391c828 DB |
161 | /* Vendor and product id defaults change according to what configs |
162 | * we support. (As does bNumConfigurations.) These values can | |
163 | * also be overridden by module parameters. | |
164 | */ | |
551509d2 HH |
165 | .idVendor = cpu_to_le16 (CDC_VENDOR_NUM), |
166 | .idProduct = cpu_to_le16 (CDC_PRODUCT_NUM), | |
0391c828 DB |
167 | /* .bcdDevice = f(hardware) */ |
168 | /* .iManufacturer = DYNAMIC */ | |
169 | /* .iProduct = DYNAMIC */ | |
170 | /* NO SERIAL NUMBER */ | |
1da177e4 LT |
171 | .bNumConfigurations = 1, |
172 | }; | |
173 | ||
9b95236e | 174 | static const struct usb_descriptor_header *otg_desc[2]; |
1da177e4 | 175 | |
0391c828 | 176 | static struct usb_string strings_dev[] = { |
cc2683c3 | 177 | [USB_GADGET_MANUFACTURER_IDX].s = "", |
276e2e4f SAS |
178 | [USB_GADGET_PRODUCT_IDX].s = PREFIX DRIVER_DESC, |
179 | [USB_GADGET_SERIAL_IDX].s = "", | |
0391c828 | 180 | { } /* end of list */ |
1da177e4 LT |
181 | }; |
182 | ||
0391c828 DB |
183 | static struct usb_gadget_strings stringtab_dev = { |
184 | .language = 0x0409, /* en-us */ | |
185 | .strings = strings_dev, | |
1da177e4 LT |
186 | }; |
187 | ||
0391c828 DB |
188 | static struct usb_gadget_strings *dev_strings[] = { |
189 | &stringtab_dev, | |
190 | NULL, | |
1da177e4 LT |
191 | }; |
192 | ||
9c62ce83 AP |
193 | static struct usb_function_instance *fi_ecm; |
194 | static struct usb_function *f_ecm; | |
195 | ||
94b5573e AP |
196 | static struct usb_function_instance *fi_eem; |
197 | static struct usb_function *f_eem; | |
198 | ||
8af5232d AP |
199 | static struct usb_function_instance *fi_geth; |
200 | static struct usb_function *f_geth; | |
201 | ||
9bd4a10e AP |
202 | static struct usb_function_instance *fi_rndis; |
203 | static struct usb_function *f_rndis; | |
204 | ||
0391c828 | 205 | /*-------------------------------------------------------------------------*/ |
11d54898 | 206 | |
0391c828 DB |
207 | /* |
208 | * We may not have an RNDIS configuration, but if we do it needs to be | |
209 | * the first one present. That's to make Microsoft's drivers happy, | |
210 | * and to follow DOCSIS 1.0 (cable modem standard). | |
11d54898 | 211 | */ |
c94e289f | 212 | static int rndis_do_config(struct usb_configuration *c) |
0391c828 | 213 | { |
9bd4a10e AP |
214 | int status; |
215 | ||
0391c828 | 216 | /* FIXME alloc iConfiguration string, set it in c->strings */ |
11d54898 | 217 | |
0391c828 DB |
218 | if (gadget_is_otg(c->cdev->gadget)) { |
219 | c->descriptors = otg_desc; | |
220 | c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
221 | } | |
1da177e4 | 222 | |
9bd4a10e AP |
223 | f_rndis = usb_get_function(fi_rndis); |
224 | if (IS_ERR(f_rndis)) | |
225 | return PTR_ERR(f_rndis); | |
226 | ||
227 | status = usb_add_function(c, f_rndis); | |
228 | if (status < 0) | |
229 | usb_put_function(f_rndis); | |
230 | ||
231 | return status; | |
0391c828 | 232 | } |
1da177e4 | 233 | |
0391c828 DB |
234 | static struct usb_configuration rndis_config_driver = { |
235 | .label = "RNDIS", | |
0391c828 DB |
236 | .bConfigurationValue = 2, |
237 | /* .iConfiguration = DYNAMIC */ | |
238 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
1da177e4 LT |
239 | }; |
240 | ||
0391c828 | 241 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 242 | |
c9188ad2 | 243 | #ifdef CONFIG_USB_ETH_EEM |
90ab5ee9 | 244 | static bool use_eem = 1; |
9b39e9dd | 245 | #else |
90ab5ee9 | 246 | static bool use_eem; |
9b39e9dd BN |
247 | #endif |
248 | module_param(use_eem, bool, 0); | |
249 | MODULE_PARM_DESC(use_eem, "use CDC EEM mode"); | |
250 | ||
0391c828 | 251 | /* |
9b39e9dd | 252 | * We _always_ have an ECM, CDC Subset, or EEM configuration. |
1da177e4 | 253 | */ |
c94e289f | 254 | static int eth_do_config(struct usb_configuration *c) |
0391c828 | 255 | { |
9c62ce83 AP |
256 | int status = 0; |
257 | ||
0391c828 | 258 | /* FIXME alloc iConfiguration string, set it in c->strings */ |
7e27f18c | 259 | |
0391c828 DB |
260 | if (gadget_is_otg(c->cdev->gadget)) { |
261 | c->descriptors = otg_desc; | |
262 | c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
263 | } | |
1da177e4 | 264 | |
94b5573e AP |
265 | if (use_eem) { |
266 | f_eem = usb_get_function(fi_eem); | |
267 | if (IS_ERR(f_eem)) | |
268 | return PTR_ERR(f_eem); | |
269 | ||
270 | status = usb_add_function(c, f_eem); | |
271 | if (status < 0) | |
272 | usb_put_function(f_eem); | |
273 | ||
274 | return status; | |
275 | } else if (can_support_ecm(c->cdev->gadget)) { | |
9c62ce83 AP |
276 | f_ecm = usb_get_function(fi_ecm); |
277 | if (IS_ERR(f_ecm)) | |
278 | return PTR_ERR(f_ecm); | |
279 | ||
280 | status = usb_add_function(c, f_ecm); | |
281 | if (status < 0) | |
282 | usb_put_function(f_ecm); | |
283 | ||
284 | return status; | |
8af5232d AP |
285 | } else { |
286 | f_geth = usb_get_function(fi_geth); | |
287 | if (IS_ERR(f_geth)) | |
288 | return PTR_ERR(f_geth); | |
289 | ||
290 | status = usb_add_function(c, f_geth); | |
291 | if (status < 0) | |
292 | usb_put_function(f_geth); | |
293 | ||
294 | return status; | |
295 | } | |
9c62ce83 | 296 | |
0391c828 | 297 | } |
1da177e4 | 298 | |
0391c828 DB |
299 | static struct usb_configuration eth_config_driver = { |
300 | /* .label = f(hardware) */ | |
0391c828 DB |
301 | .bConfigurationValue = 1, |
302 | /* .iConfiguration = DYNAMIC */ | |
303 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
1da177e4 LT |
304 | }; |
305 | ||
0391c828 | 306 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 307 | |
c94e289f | 308 | static int eth_bind(struct usb_composite_dev *cdev) |
0391c828 | 309 | { |
0391c828 | 310 | struct usb_gadget *gadget = cdev->gadget; |
94b5573e | 311 | struct f_eem_opts *eem_opts = NULL; |
9c62ce83 | 312 | struct f_ecm_opts *ecm_opts = NULL; |
8af5232d AP |
313 | struct f_gether_opts *geth_opts = NULL; |
314 | struct net_device *net; | |
0391c828 | 315 | int status; |
1da177e4 | 316 | |
0391c828 | 317 | /* set up main config label and device descriptor */ |
9b39e9dd BN |
318 | if (use_eem) { |
319 | /* EEM */ | |
94b5573e AP |
320 | fi_eem = usb_get_function_instance("eem"); |
321 | if (IS_ERR(fi_eem)) | |
322 | return PTR_ERR(fi_eem); | |
323 | ||
324 | eem_opts = container_of(fi_eem, struct f_eem_opts, func_inst); | |
325 | ||
8af5232d | 326 | net = eem_opts->net; |
94b5573e | 327 | |
9b39e9dd BN |
328 | eth_config_driver.label = "CDC Ethernet (EEM)"; |
329 | device_desc.idVendor = cpu_to_le16(EEM_VENDOR_NUM); | |
330 | device_desc.idProduct = cpu_to_le16(EEM_PRODUCT_NUM); | |
9c62ce83 | 331 | } else if (can_support_ecm(gadget)) { |
0391c828 | 332 | /* ECM */ |
9c62ce83 AP |
333 | |
334 | fi_ecm = usb_get_function_instance("ecm"); | |
335 | if (IS_ERR(fi_ecm)) | |
336 | return PTR_ERR(fi_ecm); | |
337 | ||
338 | ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst); | |
339 | ||
8af5232d | 340 | net = ecm_opts->net; |
9c62ce83 | 341 | |
0391c828 DB |
342 | eth_config_driver.label = "CDC Ethernet (ECM)"; |
343 | } else { | |
344 | /* CDC Subset */ | |
8af5232d AP |
345 | |
346 | fi_geth = usb_get_function_instance("geth"); | |
347 | if (IS_ERR(fi_geth)) | |
348 | return PTR_ERR(fi_geth); | |
349 | ||
350 | geth_opts = container_of(fi_geth, struct f_gether_opts, | |
351 | func_inst); | |
352 | ||
353 | net = geth_opts->net; | |
8af5232d | 354 | |
0391c828 | 355 | eth_config_driver.label = "CDC Subset/SAFE"; |
1da177e4 | 356 | |
4e19f220 DB |
357 | device_desc.idVendor = cpu_to_le16(SIMPLE_VENDOR_NUM); |
358 | device_desc.idProduct = cpu_to_le16(SIMPLE_PRODUCT_NUM); | |
359 | if (!has_rndis()) | |
360 | device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC; | |
0391c828 | 361 | } |
1da177e4 | 362 | |
8af5232d AP |
363 | gether_set_qmult(net, qmult); |
364 | if (!gether_set_host_addr(net, host_addr)) | |
365 | pr_info("using host ethernet address: %s", host_addr); | |
366 | if (!gether_set_dev_addr(net, dev_addr)) | |
367 | pr_info("using self ethernet address: %s", dev_addr); | |
368 | ||
0391c828 DB |
369 | if (has_rndis()) { |
370 | /* RNDIS plus ECM-or-Subset */ | |
8af5232d AP |
371 | gether_set_gadget(net, cdev->gadget); |
372 | status = gether_register_netdev(net); | |
373 | if (status) | |
374 | goto fail; | |
8af5232d AP |
375 | |
376 | if (use_eem) | |
94b5573e | 377 | eem_opts->bound = true; |
8af5232d | 378 | else if (can_support_ecm(gadget)) |
9c62ce83 | 379 | ecm_opts->bound = true; |
8af5232d AP |
380 | else |
381 | geth_opts->bound = true; | |
9c62ce83 | 382 | |
9bd4a10e AP |
383 | fi_rndis = usb_get_function_instance("rndis"); |
384 | if (IS_ERR(fi_rndis)) { | |
385 | status = PTR_ERR(fi_rndis); | |
386 | goto fail; | |
387 | } | |
388 | ||
389 | rndis_borrow_net(fi_rndis, net); | |
390 | ||
4e19f220 DB |
391 | device_desc.idVendor = cpu_to_le16(RNDIS_VENDOR_NUM); |
392 | device_desc.idProduct = cpu_to_le16(RNDIS_PRODUCT_NUM); | |
0391c828 DB |
393 | device_desc.bNumConfigurations = 2; |
394 | } | |
1da177e4 | 395 | |
0391c828 DB |
396 | /* Allocate string descriptor numbers ... note that string |
397 | * contents can be overridden by the composite_dev glue. | |
398 | */ | |
1da177e4 | 399 | |
e1f15ccb | 400 | status = usb_string_ids_tab(cdev, strings_dev); |
0391c828 | 401 | if (status < 0) |
9bd4a10e | 402 | goto fail1; |
276e2e4f SAS |
403 | device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id; |
404 | device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id; | |
1da177e4 | 405 | |
9b95236e LJ |
406 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
407 | struct usb_descriptor_header *usb_desc; | |
408 | ||
409 | usb_desc = usb_otg_descriptor_alloc(gadget); | |
410 | if (!usb_desc) | |
411 | goto fail1; | |
412 | usb_otg_descriptor_init(gadget, usb_desc); | |
413 | otg_desc[0] = usb_desc; | |
414 | otg_desc[1] = NULL; | |
415 | } | |
416 | ||
0391c828 DB |
417 | /* register our configuration(s); RNDIS first, if it's used */ |
418 | if (has_rndis()) { | |
c9bfff9c UKK |
419 | status = usb_add_config(cdev, &rndis_config_driver, |
420 | rndis_do_config); | |
0391c828 | 421 | if (status < 0) |
9b95236e | 422 | goto fail2; |
0391c828 | 423 | } |
1da177e4 | 424 | |
c9bfff9c | 425 | status = usb_add_config(cdev, ð_config_driver, eth_do_config); |
0391c828 | 426 | if (status < 0) |
9b95236e | 427 | goto fail2; |
1da177e4 | 428 | |
7d16e8d3 | 429 | usb_composite_overwrite_options(cdev, &coverwrite); |
33376c1c DB |
430 | dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n", |
431 | DRIVER_DESC); | |
1da177e4 | 432 | |
0391c828 | 433 | return 0; |
1da177e4 | 434 | |
9b95236e LJ |
435 | fail2: |
436 | kfree(otg_desc[0]); | |
437 | otg_desc[0] = NULL; | |
9bd4a10e AP |
438 | fail1: |
439 | if (has_rndis()) | |
440 | usb_put_function_instance(fi_rndis); | |
0391c828 | 441 | fail: |
8af5232d | 442 | if (use_eem) |
94b5573e | 443 | usb_put_function_instance(fi_eem); |
8af5232d | 444 | else if (can_support_ecm(gadget)) |
9c62ce83 | 445 | usb_put_function_instance(fi_ecm); |
8af5232d AP |
446 | else |
447 | usb_put_function_instance(fi_geth); | |
0391c828 DB |
448 | return status; |
449 | } | |
1da177e4 | 450 | |
c94e289f | 451 | static int eth_unbind(struct usb_composite_dev *cdev) |
0391c828 | 452 | { |
23a113a0 AP |
453 | if (has_rndis()) { |
454 | usb_put_function(f_rndis); | |
9bd4a10e | 455 | usb_put_function_instance(fi_rndis); |
23a113a0 AP |
456 | } |
457 | if (use_eem) { | |
458 | usb_put_function(f_eem); | |
94b5573e | 459 | usb_put_function_instance(fi_eem); |
23a113a0 AP |
460 | } else if (can_support_ecm(cdev->gadget)) { |
461 | usb_put_function(f_ecm); | |
9c62ce83 | 462 | usb_put_function_instance(fi_ecm); |
23a113a0 AP |
463 | } else { |
464 | usb_put_function(f_geth); | |
8af5232d | 465 | usb_put_function_instance(fi_geth); |
23a113a0 | 466 | } |
9b95236e LJ |
467 | kfree(otg_desc[0]); |
468 | otg_desc[0] = NULL; | |
469 | ||
0391c828 DB |
470 | return 0; |
471 | } | |
1da177e4 | 472 | |
c94e289f | 473 | static struct usb_composite_driver eth_driver = { |
0391c828 DB |
474 | .name = "g_ether", |
475 | .dev = &device_desc, | |
476 | .strings = dev_strings, | |
04617db7 | 477 | .max_speed = USB_SPEED_SUPER, |
03e42bd5 | 478 | .bind = eth_bind, |
c94e289f | 479 | .unbind = eth_unbind, |
1da177e4 LT |
480 | }; |
481 | ||
909346a8 TK |
482 | module_usb_composite_driver(eth_driver); |
483 | ||
0391c828 DB |
484 | MODULE_DESCRIPTION(PREFIX DRIVER_DESC); |
485 | MODULE_AUTHOR("David Brownell, Benedikt Spanger"); | |
486 | MODULE_LICENSE("GPL"); |