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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
3 *
David Brownell0391c822008-06-19 18:20:11 -07004 * Copyright (C) 2003-2005,2008 David Brownell
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
David Brownell0391c822008-06-19 18:20:11 -07006 * Copyright (C) 2008 Nokia Corporation
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 */
13
David Brownell0cf4f2d2007-08-02 00:00:38 -070014/* #define VERBOSE_DEBUG */
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/utsname.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Michal Nazarewicz396cda92009-11-30 10:55:40 +010019
20#if defined USB_ETH_RNDIS
21# undef USB_ETH_RNDIS
22#endif
23#ifdef CONFIG_USB_ETH_RNDIS
24# define USB_ETH_RNDIS y
25#endif
26
David Brownell0391c822008-06-19 18:20:11 -070027#include "u_ether.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30/*
31 * Ethernet gadget driver -- with CDC and non-CDC options
32 * Builds on hardware support for a full duplex link.
33 *
34 * CDC Ethernet is the standard USB solution for sending Ethernet frames
35 * using USB. Real hardware tends to use the same framing protocol but look
36 * different for control features. This driver strongly prefers to use
37 * this USB-IF standard as its open-systems interoperability solution;
38 * most host side USB stacks (except from Microsoft) support it.
39 *
David Brownell0391c822008-06-19 18:20:11 -070040 * This is sometimes called "CDC ECM" (Ethernet Control Model) to support
41 * TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new
42 * "CDC EEM" (Ethernet Emulation Model) is starting to spread.
43 *
44 * There's some hardware that can't talk CDC ECM. We make that hardware
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 * implement a "minimalist" vendor-agnostic CDC core: same framing, but
David Brownell11d54892006-12-11 15:59:04 -080046 * link-level setup only requires activating the configuration. Only the
47 * endpoint descriptors, and product/vendor IDs, are relevant; no control
48 * operations are available. Linux supports it, but other host operating
49 * systems may not. (This is a subset of CDC Ethernet.)
50 *
51 * It turns out that if you add a few descriptors to that "CDC Subset",
52 * (Windows) host side drivers from MCCI can treat it as one submode of
53 * a proprietary scheme called "SAFE" ... without needing to know about
54 * specific product/vendor IDs. So we do that, making it easier to use
55 * those MS-Windows drivers. Those added descriptors make it resemble a
56 * CDC MDLM device, but they don't change device behavior at all. (See
57 * MCCI Engineering report 950198 "SAFE Networking Functions".)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 *
59 * A third option is also in use. Rather than CDC Ethernet, or something
60 * simpler, Microsoft pushes their own approach: RNDIS. The published
61 * RNDIS specs are ambiguous and appear to be incomplete, and are also
David Brownell0391c822008-06-19 18:20:11 -070062 * needlessly complex. They borrow more from CDC ACM than CDC ECM.
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 */
64
65#define DRIVER_DESC "Ethernet Gadget"
David Brownell0391c822008-06-19 18:20:11 -070066#define DRIVER_VERSION "Memorial Day 2008"
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Michal Nazarewicz396cda92009-11-30 10:55:40 +010068#ifdef USB_ETH_RNDIS
David Brownell0391c822008-06-19 18:20:11 -070069#define PREFIX "RNDIS/"
70#else
71#define PREFIX ""
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#endif
73
David Brownell0391c822008-06-19 18:20:11 -070074/*
75 * This driver aims for interoperability by using CDC ECM unless
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 *
David Brownell0391c822008-06-19 18:20:11 -070077 * can_support_ecm()
78 *
79 * returns false, in which case it supports the CDC Subset. By default,
80 * that returns true; most hardware has no problems with CDC ECM, that's
81 * a good default. Previous versions of this driver had no default; this
82 * version changes that, removing overhead for new controller support.
83 *
84 * IF YOUR HARDWARE CAN'T SUPPORT CDC ECM, UPDATE THAT ROUTINE!
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
David Brownell0391c822008-06-19 18:20:11 -070087static inline bool has_rndis(void)
88{
Michal Nazarewicz396cda92009-11-30 10:55:40 +010089#ifdef USB_ETH_RNDIS
David Brownell0391c822008-06-19 18:20:11 -070090 return true;
91#else
92 return false;
93#endif
94}
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096/*-------------------------------------------------------------------------*/
97
David Brownell33376c12008-08-18 17:45:07 -070098/*
99 * Kbuild is not very cooperative with respect to linking separately
100 * compiled library objects into one module. So for now we won't use
101 * separate compilation ... ensuring init/exit sections work to shrink
102 * the runtime footprint, and giving us at least some parts of what
103 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
104 */
105#include "composite.c"
106#include "usbstring.c"
107#include "config.c"
108#include "epautoconf.c"
109
110#include "f_ecm.c"
111#include "f_subset.c"
Michal Nazarewicz396cda92009-11-30 10:55:40 +0100112#ifdef USB_ETH_RNDIS
David Brownell33376c12008-08-18 17:45:07 -0700113#include "f_rndis.c"
114#include "rndis.c"
115#endif
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500116#include "f_eem.c"
David Brownell33376c12008-08-18 17:45:07 -0700117#include "u_ether.c"
118
119/*-------------------------------------------------------------------------*/
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
122 * Instead: allocate your own, using normal USB-IF procedures.
123 */
124
125/* Thanks to NetChip Technologies for donating this product ID.
126 * It's for devices with only CDC Ethernet configurations.
127 */
David Brownell0391c822008-06-19 18:20:11 -0700128#define CDC_VENDOR_NUM 0x0525 /* NetChip */
129#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131/* For hardware that can't talk CDC, we use the same vendor ID that
132 * ARM Linux has used for ethernet-over-usb, both with sa1100 and
133 * with pxa250. We're protocol-compatible, if the host-side drivers
134 * use the endpoint descriptors. bcdDevice (version) is nonzero, so
135 * drivers that need to hard-wire endpoint numbers have a hook.
136 *
137 * The protocol is a minimal subset of CDC Ether, which works on any bulk
138 * hardware that's not deeply broken ... even on hardware that can't talk
139 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
140 * doesn't handle control-OUT).
141 */
142#define SIMPLE_VENDOR_NUM 0x049f
143#define SIMPLE_PRODUCT_NUM 0x505a
144
145/* For hardware that can talk RNDIS and either of the above protocols,
146 * use this ID ... the windows INF files will know it. Unless it's
147 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
148 * the non-RNDIS configuration.
149 */
150#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
151#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
152
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500153/* For EEM gadgets */
Brian Niebuhr4238ef52009-10-14 12:04:33 -0500154#define EEM_VENDOR_NUM 0x1d6b /* Linux Foundation */
155#define EEM_PRODUCT_NUM 0x0102 /* EEM Gadget */
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157/*-------------------------------------------------------------------------*/
158
David Brownell0391c822008-06-19 18:20:11 -0700159static struct usb_device_descriptor device_desc = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 .bLength = sizeof device_desc,
161 .bDescriptorType = USB_DT_DEVICE,
162
Harvey Harrison551509d2009-02-11 14:11:36 -0800163 .bcdUSB = cpu_to_le16 (0x0200),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165 .bDeviceClass = USB_CLASS_COMM,
166 .bDeviceSubClass = 0,
167 .bDeviceProtocol = 0,
David Brownell0391c822008-06-19 18:20:11 -0700168 /* .bMaxPacketSize0 = f(hardware) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
David Brownell0391c822008-06-19 18:20:11 -0700170 /* Vendor and product id defaults change according to what configs
171 * we support. (As does bNumConfigurations.) These values can
172 * also be overridden by module parameters.
173 */
Harvey Harrison551509d2009-02-11 14:11:36 -0800174 .idVendor = cpu_to_le16 (CDC_VENDOR_NUM),
175 .idProduct = cpu_to_le16 (CDC_PRODUCT_NUM),
David Brownell0391c822008-06-19 18:20:11 -0700176 /* .bcdDevice = f(hardware) */
177 /* .iManufacturer = DYNAMIC */
178 /* .iProduct = DYNAMIC */
179 /* NO SERIAL NUMBER */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 .bNumConfigurations = 1,
181};
182
David Brownell0391c822008-06-19 18:20:11 -0700183static struct usb_otg_descriptor otg_descriptor = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 .bLength = sizeof otg_descriptor,
185 .bDescriptorType = USB_DT_OTG,
186
David Brownell0391c822008-06-19 18:20:11 -0700187 /* REVISIT SRP-only hardware is possible, although
188 * it would not be called "OTG" ...
189 */
190 .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191};
192
David Brownell0391c822008-06-19 18:20:11 -0700193static const struct usb_descriptor_header *otg_desc[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 (struct usb_descriptor_header *) &otg_descriptor,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 NULL,
196};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
David Brownell0391c822008-06-19 18:20:11 -0700199/* string IDs are assigned dynamically */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
David Brownell0391c822008-06-19 18:20:11 -0700201#define STRING_MANUFACTURER_IDX 0
202#define STRING_PRODUCT_IDX 1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
David Brownell0391c822008-06-19 18:20:11 -0700204static char manufacturer[50];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
David Brownell0391c822008-06-19 18:20:11 -0700206static struct usb_string strings_dev[] = {
207 [STRING_MANUFACTURER_IDX].s = manufacturer,
208 [STRING_PRODUCT_IDX].s = PREFIX DRIVER_DESC,
209 { } /* end of list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210};
211
David Brownell0391c822008-06-19 18:20:11 -0700212static struct usb_gadget_strings stringtab_dev = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 .language = 0x0409, /* en-us */
David Brownell0391c822008-06-19 18:20:11 -0700214 .strings = strings_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215};
216
David Brownell0391c822008-06-19 18:20:11 -0700217static struct usb_gadget_strings *dev_strings[] = {
218 &stringtab_dev,
219 NULL,
220};
221
222static u8 hostaddr[ETH_ALEN];
223
224/*-------------------------------------------------------------------------*/
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226/*
David Brownell0391c822008-06-19 18:20:11 -0700227 * We may not have an RNDIS configuration, but if we do it needs to be
228 * the first one present. That's to make Microsoft's drivers happy,
229 * and to follow DOCSIS 1.0 (cable modem standard).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 */
Michal Nazarewicze12995e2010-08-12 17:43:52 +0200231static int __init rndis_do_config(struct usb_configuration *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
David Brownell0391c822008-06-19 18:20:11 -0700233 /* FIXME alloc iConfiguration string, set it in c->strings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
David Brownell0391c822008-06-19 18:20:11 -0700235 if (gadget_is_otg(c->cdev->gadget)) {
236 c->descriptors = otg_desc;
237 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
239
David Brownell0391c822008-06-19 18:20:11 -0700240 return rndis_bind_config(c, hostaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
David Brownell0391c822008-06-19 18:20:11 -0700243static struct usb_configuration rndis_config_driver = {
244 .label = "RNDIS",
David Brownell0391c822008-06-19 18:20:11 -0700245 .bConfigurationValue = 2,
246 /* .iConfiguration = DYNAMIC */
247 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
David Brownell0391c822008-06-19 18:20:11 -0700248};
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250/*-------------------------------------------------------------------------*/
251
Robert P. J. Dayc9188ad2009-12-28 06:31:08 -0500252#ifdef CONFIG_USB_ETH_EEM
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030253static bool use_eem = 1;
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500254#else
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030255static bool use_eem;
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500256#endif
257module_param(use_eem, bool, 0);
258MODULE_PARM_DESC(use_eem, "use CDC EEM mode");
259
David Brownell0391c822008-06-19 18:20:11 -0700260/*
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500261 * We _always_ have an ECM, CDC Subset, or EEM configuration.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 */
Michal Nazarewicze12995e2010-08-12 17:43:52 +0200263static int __init eth_do_config(struct usb_configuration *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264{
David Brownell0391c822008-06-19 18:20:11 -0700265 /* FIXME alloc iConfiguration string, set it in c->strings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
David Brownell0391c822008-06-19 18:20:11 -0700267 if (gadget_is_otg(c->cdev->gadget)) {
268 c->descriptors = otg_desc;
269 c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 }
271
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500272 if (use_eem)
273 return eem_bind_config(c);
274 else if (can_support_ecm(c->cdev->gadget))
David Brownell0391c822008-06-19 18:20:11 -0700275 return ecm_bind_config(c, hostaddr);
276 else
277 return geth_bind_config(c, hostaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278}
279
David Brownell0391c822008-06-19 18:20:11 -0700280static struct usb_configuration eth_config_driver = {
281 /* .label = f(hardware) */
David Brownell0391c822008-06-19 18:20:11 -0700282 .bConfigurationValue = 1,
283 /* .iConfiguration = DYNAMIC */
284 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
David Brownell0391c822008-06-19 18:20:11 -0700285};
286
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287/*-------------------------------------------------------------------------*/
288
Michal Nazarewicze12995e2010-08-12 17:43:52 +0200289static int __init eth_bind(struct usb_composite_dev *cdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290{
David Brownell0391c822008-06-19 18:20:11 -0700291 int gcnum;
292 struct usb_gadget *gadget = cdev->gadget;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 int status;
David Brownell7e27f182006-06-13 09:54:40 -0700294
David Brownell0391c822008-06-19 18:20:11 -0700295 /* set up network link layer */
296 status = gether_setup(cdev->gadget, hostaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 if (status < 0)
David Brownell0391c822008-06-19 18:20:11 -0700298 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
David Brownell0391c822008-06-19 18:20:11 -0700300 /* set up main config label and device descriptor */
Brian Niebuhr9b39e9d2009-08-14 10:04:22 -0500301 if (use_eem) {
302 /* EEM */
303 eth_config_driver.label = "CDC Ethernet (EEM)";
304 device_desc.idVendor = cpu_to_le16(EEM_VENDOR_NUM);
305 device_desc.idProduct = cpu_to_le16(EEM_PRODUCT_NUM);
306 } else if (can_support_ecm(cdev->gadget)) {
David Brownell0391c822008-06-19 18:20:11 -0700307 /* ECM */
308 eth_config_driver.label = "CDC Ethernet (ECM)";
309 } else {
310 /* CDC Subset */
311 eth_config_driver.label = "CDC Subset/SAFE";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
David Brownell4e19f222009-06-19 03:09:04 -0700313 device_desc.idVendor = cpu_to_le16(SIMPLE_VENDOR_NUM);
314 device_desc.idProduct = cpu_to_le16(SIMPLE_PRODUCT_NUM);
315 if (!has_rndis())
316 device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 }
318
David Brownell0391c822008-06-19 18:20:11 -0700319 if (has_rndis()) {
320 /* RNDIS plus ECM-or-Subset */
David Brownell4e19f222009-06-19 03:09:04 -0700321 device_desc.idVendor = cpu_to_le16(RNDIS_VENDOR_NUM);
322 device_desc.idProduct = cpu_to_le16(RNDIS_PRODUCT_NUM);
David Brownell0391c822008-06-19 18:20:11 -0700323 device_desc.bNumConfigurations = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 }
325
David Brownell0391c822008-06-19 18:20:11 -0700326 gcnum = usb_gadget_controller_number(gadget);
David Brownell91e79c92005-07-13 15:18:30 -0700327 if (gcnum >= 0)
David Brownell0391c822008-06-19 18:20:11 -0700328 device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
David Brownell91e79c92005-07-13 15:18:30 -0700329 else {
David Brownell0391c822008-06-19 18:20:11 -0700330 /* We assume that can_support_ecm() tells the truth;
331 * but if the controller isn't recognized at all then
332 * that assumption is a bit more likely to be wrong.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 */
David Brownell33376c12008-08-18 17:45:07 -0700334 dev_warn(&gadget->dev,
335 "controller '%s' not recognized; trying %s\n",
David Brownell0391c822008-06-19 18:20:11 -0700336 gadget->name,
337 eth_config_driver.label);
338 device_desc.bcdDevice =
Harvey Harrison551509d2009-02-11 14:11:36 -0800339 cpu_to_le16(0x0300 | 0x0099);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 }
David Brownell0391c822008-06-19 18:20:11 -0700341
342
343 /* Allocate string descriptor numbers ... note that string
344 * contents can be overridden by the composite_dev glue.
345 */
346
347 /* device descriptor strings: manufacturer, product */
348 snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700349 init_utsname()->sysname, init_utsname()->release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 gadget->name);
David Brownell0391c822008-06-19 18:20:11 -0700351 status = usb_string_id(cdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 if (status < 0)
David Brownell0391c822008-06-19 18:20:11 -0700353 goto fail;
354 strings_dev[STRING_MANUFACTURER_IDX].id = status;
355 device_desc.iManufacturer = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
David Brownell0391c822008-06-19 18:20:11 -0700357 status = usb_string_id(cdev);
358 if (status < 0)
359 goto fail;
360 strings_dev[STRING_PRODUCT_IDX].id = status;
361 device_desc.iProduct = status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
David Brownell0391c822008-06-19 18:20:11 -0700363 /* register our configuration(s); RNDIS first, if it's used */
364 if (has_rndis()) {
Uwe Kleine-Königc9bfff92010-08-12 17:43:55 +0200365 status = usb_add_config(cdev, &rndis_config_driver,
366 rndis_do_config);
David Brownell0391c822008-06-19 18:20:11 -0700367 if (status < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Uwe Kleine-Königc9bfff92010-08-12 17:43:55 +0200371 status = usb_add_config(cdev, &eth_config_driver, eth_do_config);
David Brownell0391c822008-06-19 18:20:11 -0700372 if (status < 0)
373 goto fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
David Brownell33376c12008-08-18 17:45:07 -0700375 dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
376 DRIVER_DESC);
David Brownell0391c822008-06-19 18:20:11 -0700377
378 return 0;
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380fail:
David Brownell0391c822008-06-19 18:20:11 -0700381 gether_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 return status;
383}
384
David Brownell0391c822008-06-19 18:20:11 -0700385static int __exit eth_unbind(struct usb_composite_dev *cdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
David Brownell0391c822008-06-19 18:20:11 -0700387 gether_cleanup();
388 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389}
390
David Brownell0391c822008-06-19 18:20:11 -0700391static struct usb_composite_driver eth_driver = {
392 .name = "g_ether",
393 .dev = &device_desc,
394 .strings = dev_strings,
Paul Zimmerman04617db2011-06-27 14:13:18 -0700395 .max_speed = USB_SPEED_SUPER,
David Brownell0391c822008-06-19 18:20:11 -0700396 .unbind = __exit_p(eth_unbind),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397};
398
David Brownell0391c822008-06-19 18:20:11 -0700399MODULE_DESCRIPTION(PREFIX DRIVER_DESC);
400MODULE_AUTHOR("David Brownell, Benedikt Spanger");
401MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
David Brownell0391c822008-06-19 18:20:11 -0700403static int __init init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404{
Michal Nazarewicz07a18bd2010-08-12 17:43:54 +0200405 return usb_composite_probe(&eth_driver, eth_bind);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406}
David Brownell0391c822008-06-19 18:20:11 -0700407module_init(init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
David Brownell0391c822008-06-19 18:20:11 -0700409static void __exit cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
David Brownell0391c822008-06-19 18:20:11 -0700411 usb_composite_unregister(&eth_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412}
David Brownell0391c822008-06-19 18:20:11 -0700413module_exit(cleanup);