Commit | Line | Data |
---|---|---|
2ccea03a FB |
1 | /** |
2 | * udc.c - Core UDC Framework | |
3 | * | |
4 | * Copyright (C) 2010 Texas Instruments | |
5 | * Author: Felipe Balbi <balbi@ti.com> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 of | |
9 | * the License as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/err.h> | |
a698908d | 25 | #include <linux/dma-mapping.h> |
2ccea03a FB |
26 | |
27 | #include <linux/usb/ch9.h> | |
28 | #include <linux/usb/gadget.h> | |
29 | ||
30 | /** | |
31 | * struct usb_udc - describes one usb device controller | |
32 | * @driver - the gadget driver pointer. For use by the class code | |
33 | * @dev - the child device to the actual controller | |
34 | * @gadget - the gadget. For use by the class code | |
35 | * @list - for use by the udc class driver | |
36 | * | |
37 | * This represents the internal data structure which is used by the UDC-class | |
38 | * to hold information about udc driver and gadget together. | |
39 | */ | |
40 | struct usb_udc { | |
41 | struct usb_gadget_driver *driver; | |
42 | struct usb_gadget *gadget; | |
43 | struct device dev; | |
44 | struct list_head list; | |
45 | }; | |
46 | ||
47 | static struct class *udc_class; | |
2ccea03a FB |
48 | static LIST_HEAD(udc_list); |
49 | static DEFINE_MUTEX(udc_lock); | |
50 | ||
51 | /* ------------------------------------------------------------------------- */ | |
52 | ||
a698908d FB |
53 | int usb_gadget_map_request(struct usb_gadget *gadget, |
54 | struct usb_request *req, int is_in) | |
55 | { | |
56 | if (req->length == 0) | |
57 | return 0; | |
58 | ||
59 | if (req->num_sgs) { | |
60 | int mapped; | |
61 | ||
62 | mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs, | |
63 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
64 | if (mapped == 0) { | |
65 | dev_err(&gadget->dev, "failed to map SGs\n"); | |
66 | return -EFAULT; | |
67 | } | |
68 | ||
69 | req->num_mapped_sgs = mapped; | |
70 | } else { | |
71 | req->dma = dma_map_single(&gadget->dev, req->buf, req->length, | |
72 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
73 | ||
74 | if (dma_mapping_error(&gadget->dev, req->dma)) { | |
75 | dev_err(&gadget->dev, "failed to map buffer\n"); | |
76 | return -EFAULT; | |
77 | } | |
78 | } | |
79 | ||
80 | return 0; | |
81 | } | |
82 | EXPORT_SYMBOL_GPL(usb_gadget_map_request); | |
83 | ||
84 | void usb_gadget_unmap_request(struct usb_gadget *gadget, | |
85 | struct usb_request *req, int is_in) | |
86 | { | |
87 | if (req->length == 0) | |
88 | return; | |
89 | ||
90 | if (req->num_mapped_sgs) { | |
91 | dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs, | |
92 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
93 | ||
94 | req->num_mapped_sgs = 0; | |
95 | } else { | |
96 | dma_unmap_single(&gadget->dev, req->dma, req->length, | |
97 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
98 | } | |
99 | } | |
100 | EXPORT_SYMBOL_GPL(usb_gadget_unmap_request); | |
101 | ||
102 | /* ------------------------------------------------------------------------- */ | |
103 | ||
49401f41 FB |
104 | void usb_gadget_set_state(struct usb_gadget *gadget, |
105 | enum usb_device_state state) | |
106 | { | |
107 | gadget->state = state; | |
8fc2b132 | 108 | sysfs_notify(&gadget->dev.kobj, NULL, "state"); |
49401f41 FB |
109 | } |
110 | EXPORT_SYMBOL_GPL(usb_gadget_set_state); | |
111 | ||
112 | /* ------------------------------------------------------------------------- */ | |
113 | ||
352c2dc8 SAS |
114 | /** |
115 | * usb_gadget_udc_start - tells usb device controller to start up | |
116 | * @gadget: The gadget we want to get started | |
117 | * @driver: The driver we want to bind to @gadget | |
118 | * | |
119 | * This call is issued by the UDC Class driver when it's about | |
120 | * to register a gadget driver to the device controller, before | |
121 | * calling gadget driver's bind() method. | |
122 | * | |
123 | * It allows the controller to be powered off until strictly | |
124 | * necessary to have it powered on. | |
125 | * | |
126 | * Returns zero on success, else negative errno. | |
127 | */ | |
128 | static inline int usb_gadget_udc_start(struct usb_gadget *gadget, | |
129 | struct usb_gadget_driver *driver) | |
130 | { | |
131 | return gadget->ops->udc_start(gadget, driver); | |
132 | } | |
133 | ||
352c2dc8 SAS |
134 | /** |
135 | * usb_gadget_udc_stop - tells usb device controller we don't need it anymore | |
136 | * @gadget: The device we want to stop activity | |
137 | * @driver: The driver to unbind from @gadget | |
138 | * | |
139 | * This call is issued by the UDC Class driver after calling | |
140 | * gadget driver's unbind() method. | |
141 | * | |
142 | * The details are implementation specific, but it can go as | |
143 | * far as powering off UDC completely and disable its data | |
144 | * line pullups. | |
145 | */ | |
146 | static inline void usb_gadget_udc_stop(struct usb_gadget *gadget, | |
147 | struct usb_gadget_driver *driver) | |
148 | { | |
149 | gadget->ops->udc_stop(gadget, driver); | |
150 | } | |
151 | ||
2ccea03a FB |
152 | /** |
153 | * usb_udc_release - release the usb_udc struct | |
154 | * @dev: the dev member within usb_udc | |
155 | * | |
156 | * This is called by driver's core in order to free memory once the last | |
157 | * reference is released. | |
158 | */ | |
159 | static void usb_udc_release(struct device *dev) | |
160 | { | |
161 | struct usb_udc *udc; | |
162 | ||
163 | udc = container_of(dev, struct usb_udc, dev); | |
164 | dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); | |
165 | kfree(udc); | |
166 | } | |
167 | ||
019f976e | 168 | static const struct attribute_group *usb_udc_attr_groups[]; |
792bfcf7 FB |
169 | |
170 | static void usb_udc_nop_release(struct device *dev) | |
171 | { | |
172 | dev_vdbg(dev, "%s\n", __func__); | |
173 | } | |
174 | ||
2ccea03a | 175 | /** |
792bfcf7 FB |
176 | * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list |
177 | * @parent: the parent device to this udc. Usually the controller driver's | |
178 | * device. | |
179 | * @gadget: the gadget to be added to the list. | |
180 | * @release: a gadget release function. | |
2ccea03a FB |
181 | * |
182 | * Returns zero on success, negative errno otherwise. | |
183 | */ | |
792bfcf7 FB |
184 | int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, |
185 | void (*release)(struct device *dev)) | |
2ccea03a FB |
186 | { |
187 | struct usb_udc *udc; | |
188 | int ret = -ENOMEM; | |
189 | ||
190 | udc = kzalloc(sizeof(*udc), GFP_KERNEL); | |
191 | if (!udc) | |
192 | goto err1; | |
193 | ||
7bce401c | 194 | dev_set_name(&gadget->dev, "gadget"); |
2ed14320 | 195 | gadget->dev.parent = parent; |
f07bd56b | 196 | |
658c8cf1 FB |
197 | dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask); |
198 | gadget->dev.dma_parms = parent->dma_parms; | |
199 | gadget->dev.dma_mask = parent->dma_mask; | |
200 | ||
ddf47ccb | 201 | if (release) |
792bfcf7 | 202 | gadget->dev.release = release; |
ddf47ccb FB |
203 | else |
204 | gadget->dev.release = usb_udc_nop_release; | |
792bfcf7 | 205 | |
7bce401c FB |
206 | ret = device_register(&gadget->dev); |
207 | if (ret) | |
208 | goto err2; | |
f07bd56b | 209 | |
2ccea03a FB |
210 | device_initialize(&udc->dev); |
211 | udc->dev.release = usb_udc_release; | |
212 | udc->dev.class = udc_class; | |
019f976e | 213 | udc->dev.groups = usb_udc_attr_groups; |
2ccea03a FB |
214 | udc->dev.parent = parent; |
215 | ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj)); | |
216 | if (ret) | |
f07bd56b | 217 | goto err3; |
2ccea03a FB |
218 | |
219 | udc->gadget = gadget; | |
220 | ||
221 | mutex_lock(&udc_lock); | |
222 | list_add_tail(&udc->list, &udc_list); | |
223 | ||
224 | ret = device_add(&udc->dev); | |
225 | if (ret) | |
f07bd56b | 226 | goto err4; |
2ccea03a | 227 | |
49401f41 | 228 | usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); |
2ccea03a FB |
229 | |
230 | mutex_unlock(&udc_lock); | |
231 | ||
232 | return 0; | |
f07bd56b FB |
233 | |
234 | err4: | |
2ccea03a FB |
235 | list_del(&udc->list); |
236 | mutex_unlock(&udc_lock); | |
237 | ||
f07bd56b | 238 | err3: |
2ccea03a FB |
239 | put_device(&udc->dev); |
240 | ||
f07bd56b | 241 | err2: |
7bce401c | 242 | put_device(&gadget->dev); |
c5dbc220 | 243 | kfree(udc); |
7bce401c | 244 | |
2ccea03a FB |
245 | err1: |
246 | return ret; | |
247 | } | |
792bfcf7 FB |
248 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release); |
249 | ||
250 | /** | |
251 | * usb_add_gadget_udc - adds a new gadget to the udc class driver list | |
252 | * @parent: the parent device to this udc. Usually the controller | |
253 | * driver's device. | |
254 | * @gadget: the gadget to be added to the list | |
255 | * | |
256 | * Returns zero on success, negative errno otherwise. | |
257 | */ | |
258 | int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget) | |
259 | { | |
260 | return usb_add_gadget_udc_release(parent, gadget, NULL); | |
261 | } | |
2ccea03a FB |
262 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc); |
263 | ||
264 | static void usb_gadget_remove_driver(struct usb_udc *udc) | |
265 | { | |
266 | dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n", | |
267 | udc->gadget->name); | |
268 | ||
269 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
270 | ||
2d7ebbb0 FB |
271 | usb_gadget_disconnect(udc->gadget); |
272 | udc->driver->disconnect(udc->gadget); | |
273 | udc->driver->unbind(udc->gadget); | |
511f3c53 | 274 | usb_gadget_udc_stop(udc->gadget, NULL); |
2ccea03a FB |
275 | |
276 | udc->driver = NULL; | |
277 | udc->dev.driver = NULL; | |
70d3a498 | 278 | udc->gadget->dev.driver = NULL; |
2ccea03a FB |
279 | } |
280 | ||
281 | /** | |
282 | * usb_del_gadget_udc - deletes @udc from udc_list | |
283 | * @gadget: the gadget to be removed. | |
284 | * | |
285 | * This, will call usb_gadget_unregister_driver() if | |
286 | * the @udc is still busy. | |
287 | */ | |
288 | void usb_del_gadget_udc(struct usb_gadget *gadget) | |
289 | { | |
290 | struct usb_udc *udc = NULL; | |
291 | ||
292 | mutex_lock(&udc_lock); | |
293 | list_for_each_entry(udc, &udc_list, list) | |
294 | if (udc->gadget == gadget) | |
295 | goto found; | |
296 | ||
297 | dev_err(gadget->dev.parent, "gadget not registered.\n"); | |
298 | mutex_unlock(&udc_lock); | |
299 | ||
300 | return; | |
301 | ||
302 | found: | |
303 | dev_vdbg(gadget->dev.parent, "unregistering gadget\n"); | |
304 | ||
305 | list_del(&udc->list); | |
306 | mutex_unlock(&udc_lock); | |
307 | ||
308 | if (udc->driver) | |
309 | usb_gadget_remove_driver(udc); | |
310 | ||
311 | kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); | |
312 | device_unregister(&udc->dev); | |
7bce401c | 313 | device_unregister(&gadget->dev); |
2ccea03a FB |
314 | } |
315 | EXPORT_SYMBOL_GPL(usb_del_gadget_udc); | |
316 | ||
317 | /* ------------------------------------------------------------------------- */ | |
318 | ||
4c49a5f0 | 319 | static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver) |
2ccea03a | 320 | { |
4c49a5f0 | 321 | int ret; |
2ccea03a | 322 | |
2ccea03a FB |
323 | dev_dbg(&udc->dev, "registering UDC driver [%s]\n", |
324 | driver->function); | |
325 | ||
326 | udc->driver = driver; | |
327 | udc->dev.driver = &driver->driver; | |
70d3a498 | 328 | udc->gadget->dev.driver = &driver->driver; |
2ccea03a | 329 | |
2d7ebbb0 FB |
330 | ret = driver->bind(udc->gadget, driver); |
331 | if (ret) | |
332 | goto err1; | |
333 | ret = usb_gadget_udc_start(udc->gadget, driver); | |
334 | if (ret) { | |
335 | driver->unbind(udc->gadget); | |
336 | goto err1; | |
352c2dc8 | 337 | } |
6fa3eb70 S |
338 | /* |
339 | * HACK: The Android gadget driver disconnects the gadget | |
340 | * on bind and expects the gadget to stay disconnected until | |
341 | * it calls usb_gadget_connect when userspace is ready. Remove | |
342 | * the call to usb_gadget_connect bellow to avoid enabling the | |
343 | * pullup before userspace is ready. | |
344 | * | |
345 | * usb_gadget_connect(udc->gadget); | |
346 | */ | |
2ccea03a FB |
347 | |
348 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
2ccea03a | 349 | return 0; |
2ccea03a FB |
350 | err1: |
351 | dev_err(&udc->dev, "failed to start %s: %d\n", | |
352 | udc->driver->function, ret); | |
353 | udc->driver = NULL; | |
354 | udc->dev.driver = NULL; | |
70d3a498 | 355 | udc->gadget->dev.driver = NULL; |
4c49a5f0 SAS |
356 | return ret; |
357 | } | |
358 | ||
359 | int udc_attach_driver(const char *name, struct usb_gadget_driver *driver) | |
360 | { | |
361 | struct usb_udc *udc = NULL; | |
362 | int ret = -ENODEV; | |
363 | ||
364 | mutex_lock(&udc_lock); | |
365 | list_for_each_entry(udc, &udc_list, list) { | |
366 | ret = strcmp(name, dev_name(&udc->dev)); | |
367 | if (!ret) | |
368 | break; | |
369 | } | |
370 | if (ret) { | |
371 | ret = -ENODEV; | |
372 | goto out; | |
373 | } | |
374 | if (udc->driver) { | |
375 | ret = -EBUSY; | |
376 | goto out; | |
377 | } | |
378 | ret = udc_bind_to_driver(udc, driver); | |
379 | out: | |
380 | mutex_unlock(&udc_lock); | |
381 | return ret; | |
382 | } | |
383 | EXPORT_SYMBOL_GPL(udc_attach_driver); | |
384 | ||
385 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver) | |
386 | { | |
387 | struct usb_udc *udc = NULL; | |
388 | int ret; | |
389 | ||
390 | if (!driver || !driver->bind || !driver->setup) | |
391 | return -EINVAL; | |
392 | ||
393 | mutex_lock(&udc_lock); | |
394 | list_for_each_entry(udc, &udc_list, list) { | |
395 | /* For now we take the first one */ | |
396 | if (!udc->driver) | |
397 | goto found; | |
398 | } | |
399 | ||
400 | pr_debug("couldn't find an available UDC\n"); | |
401 | mutex_unlock(&udc_lock); | |
402 | return -ENODEV; | |
403 | found: | |
404 | ret = udc_bind_to_driver(udc, driver); | |
2ccea03a FB |
405 | mutex_unlock(&udc_lock); |
406 | return ret; | |
407 | } | |
408 | EXPORT_SYMBOL_GPL(usb_gadget_probe_driver); | |
409 | ||
410 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
411 | { | |
412 | struct usb_udc *udc = NULL; | |
413 | int ret = -ENODEV; | |
414 | ||
415 | if (!driver || !driver->unbind) | |
416 | return -EINVAL; | |
417 | ||
418 | mutex_lock(&udc_lock); | |
419 | list_for_each_entry(udc, &udc_list, list) | |
420 | if (udc->driver == driver) { | |
421 | usb_gadget_remove_driver(udc); | |
422 | ret = 0; | |
423 | break; | |
424 | } | |
425 | ||
426 | mutex_unlock(&udc_lock); | |
427 | return ret; | |
428 | } | |
429 | EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver); | |
430 | ||
431 | /* ------------------------------------------------------------------------- */ | |
432 | ||
433 | static ssize_t usb_udc_srp_store(struct device *dev, | |
434 | struct device_attribute *attr, const char *buf, size_t n) | |
435 | { | |
1d91a962 | 436 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a FB |
437 | |
438 | if (sysfs_streq(buf, "1")) | |
439 | usb_gadget_wakeup(udc->gadget); | |
440 | ||
441 | return n; | |
442 | } | |
443 | static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store); | |
444 | ||
445 | static ssize_t usb_udc_softconn_store(struct device *dev, | |
446 | struct device_attribute *attr, const char *buf, size_t n) | |
447 | { | |
865569ba | 448 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a | 449 | |
42a1d036 FB |
450 | if (!udc->driver) { |
451 | dev_err(dev, "soft-connect without a gadget driver\n"); | |
452 | return -EOPNOTSUPP; | |
453 | } | |
454 | ||
2ccea03a | 455 | if (sysfs_streq(buf, "connect")) { |
2d7ebbb0 | 456 | usb_gadget_udc_start(udc->gadget, udc->driver); |
2ccea03a FB |
457 | usb_gadget_connect(udc->gadget); |
458 | } else if (sysfs_streq(buf, "disconnect")) { | |
83a787a7 | 459 | usb_gadget_disconnect(udc->gadget); |
2d7ebbb0 | 460 | usb_gadget_udc_stop(udc->gadget, udc->driver); |
2ccea03a FB |
461 | } else { |
462 | dev_err(dev, "unsupported command '%s'\n", buf); | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | return n; | |
467 | } | |
468 | static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store); | |
469 | ||
49401f41 FB |
470 | static ssize_t usb_gadget_state_show(struct device *dev, |
471 | struct device_attribute *attr, char *buf) | |
472 | { | |
473 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
474 | struct usb_gadget *gadget = udc->gadget; | |
475 | ||
476 | return sprintf(buf, "%s\n", usb_state_string(gadget->state)); | |
477 | } | |
478 | static DEVICE_ATTR(state, S_IRUGO, usb_gadget_state_show, NULL); | |
479 | ||
d327ab5b MN |
480 | #define USB_UDC_SPEED_ATTR(name, param) \ |
481 | ssize_t usb_udc_##param##_show(struct device *dev, \ | |
482 | struct device_attribute *attr, char *buf) \ | |
483 | { \ | |
484 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ | |
485 | return snprintf(buf, PAGE_SIZE, "%s\n", \ | |
486 | usb_speed_string(udc->gadget->param)); \ | |
487 | } \ | |
a5fcb066 | 488 | static DEVICE_ATTR(name, S_IRUGO, usb_udc_##param##_show, NULL) |
d327ab5b MN |
489 | |
490 | static USB_UDC_SPEED_ATTR(current_speed, speed); | |
491 | static USB_UDC_SPEED_ATTR(maximum_speed, max_speed); | |
492 | ||
2ccea03a FB |
493 | #define USB_UDC_ATTR(name) \ |
494 | ssize_t usb_udc_##name##_show(struct device *dev, \ | |
495 | struct device_attribute *attr, char *buf) \ | |
496 | { \ | |
019f976e | 497 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ |
2ccea03a FB |
498 | struct usb_gadget *gadget = udc->gadget; \ |
499 | \ | |
500 | return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \ | |
501 | } \ | |
59d81f81 | 502 | static DEVICE_ATTR(name, S_IRUGO, usb_udc_##name##_show, NULL) |
2ccea03a | 503 | |
2ccea03a FB |
504 | static USB_UDC_ATTR(is_otg); |
505 | static USB_UDC_ATTR(is_a_peripheral); | |
506 | static USB_UDC_ATTR(b_hnp_enable); | |
507 | static USB_UDC_ATTR(a_hnp_support); | |
508 | static USB_UDC_ATTR(a_alt_hnp_support); | |
509 | ||
510 | static struct attribute *usb_udc_attrs[] = { | |
511 | &dev_attr_srp.attr, | |
512 | &dev_attr_soft_connect.attr, | |
49401f41 | 513 | &dev_attr_state.attr, |
d327ab5b MN |
514 | &dev_attr_current_speed.attr, |
515 | &dev_attr_maximum_speed.attr, | |
2ccea03a | 516 | |
2ccea03a FB |
517 | &dev_attr_is_otg.attr, |
518 | &dev_attr_is_a_peripheral.attr, | |
519 | &dev_attr_b_hnp_enable.attr, | |
520 | &dev_attr_a_hnp_support.attr, | |
521 | &dev_attr_a_alt_hnp_support.attr, | |
522 | NULL, | |
523 | }; | |
524 | ||
525 | static const struct attribute_group usb_udc_attr_group = { | |
526 | .attrs = usb_udc_attrs, | |
527 | }; | |
528 | ||
529 | static const struct attribute_group *usb_udc_attr_groups[] = { | |
530 | &usb_udc_attr_group, | |
531 | NULL, | |
532 | }; | |
533 | ||
534 | static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env) | |
535 | { | |
536 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
537 | int ret; | |
538 | ||
539 | ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name); | |
540 | if (ret) { | |
541 | dev_err(dev, "failed to add uevent USB_UDC_NAME\n"); | |
542 | return ret; | |
543 | } | |
544 | ||
545 | if (udc->driver) { | |
546 | ret = add_uevent_var(env, "USB_UDC_DRIVER=%s", | |
547 | udc->driver->function); | |
548 | if (ret) { | |
549 | dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n"); | |
550 | return ret; | |
551 | } | |
552 | } | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | static int __init usb_udc_init(void) | |
558 | { | |
559 | udc_class = class_create(THIS_MODULE, "udc"); | |
560 | if (IS_ERR(udc_class)) { | |
561 | pr_err("failed to create udc class --> %ld\n", | |
562 | PTR_ERR(udc_class)); | |
563 | return PTR_ERR(udc_class); | |
564 | } | |
565 | ||
566 | udc_class->dev_uevent = usb_udc_uevent; | |
2ccea03a FB |
567 | return 0; |
568 | } | |
569 | subsys_initcall(usb_udc_init); | |
570 | ||
571 | static void __exit usb_udc_exit(void) | |
572 | { | |
573 | class_destroy(udc_class); | |
574 | } | |
575 | module_exit(usb_udc_exit); | |
576 | ||
577 | MODULE_DESCRIPTION("UDC Framework"); | |
578 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); | |
579 | MODULE_LICENSE("GPL v2"); |