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 | ||
908b9613 AS |
53 | #ifdef CONFIG_HAS_DMA |
54 | ||
a698908d FB |
55 | int usb_gadget_map_request(struct usb_gadget *gadget, |
56 | struct usb_request *req, int is_in) | |
57 | { | |
58 | if (req->length == 0) | |
59 | return 0; | |
60 | ||
61 | if (req->num_sgs) { | |
62 | int mapped; | |
63 | ||
64 | mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs, | |
65 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
66 | if (mapped == 0) { | |
67 | dev_err(&gadget->dev, "failed to map SGs\n"); | |
68 | return -EFAULT; | |
69 | } | |
70 | ||
71 | req->num_mapped_sgs = mapped; | |
72 | } else { | |
73 | req->dma = dma_map_single(&gadget->dev, req->buf, req->length, | |
74 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
75 | ||
76 | if (dma_mapping_error(&gadget->dev, req->dma)) { | |
77 | dev_err(&gadget->dev, "failed to map buffer\n"); | |
78 | return -EFAULT; | |
79 | } | |
80 | } | |
81 | ||
82 | return 0; | |
83 | } | |
84 | EXPORT_SYMBOL_GPL(usb_gadget_map_request); | |
85 | ||
86 | void usb_gadget_unmap_request(struct usb_gadget *gadget, | |
87 | struct usb_request *req, int is_in) | |
88 | { | |
89 | if (req->length == 0) | |
90 | return; | |
91 | ||
92 | if (req->num_mapped_sgs) { | |
93 | dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs, | |
94 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
95 | ||
96 | req->num_mapped_sgs = 0; | |
97 | } else { | |
98 | dma_unmap_single(&gadget->dev, req->dma, req->length, | |
99 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
100 | } | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(usb_gadget_unmap_request); | |
103 | ||
908b9613 AS |
104 | #endif /* CONFIG_HAS_DMA */ |
105 | ||
a698908d FB |
106 | /* ------------------------------------------------------------------------- */ |
107 | ||
49401f41 FB |
108 | void usb_gadget_set_state(struct usb_gadget *gadget, |
109 | enum usb_device_state state) | |
110 | { | |
111 | gadget->state = state; | |
1894870e | 112 | sysfs_notify(&gadget->dev.kobj, NULL, "state"); |
49401f41 FB |
113 | } |
114 | EXPORT_SYMBOL_GPL(usb_gadget_set_state); | |
115 | ||
116 | /* ------------------------------------------------------------------------- */ | |
117 | ||
352c2dc8 SAS |
118 | /** |
119 | * usb_gadget_udc_start - tells usb device controller to start up | |
120 | * @gadget: The gadget we want to get started | |
121 | * @driver: The driver we want to bind to @gadget | |
122 | * | |
123 | * This call is issued by the UDC Class driver when it's about | |
124 | * to register a gadget driver to the device controller, before | |
125 | * calling gadget driver's bind() method. | |
126 | * | |
127 | * It allows the controller to be powered off until strictly | |
128 | * necessary to have it powered on. | |
129 | * | |
130 | * Returns zero on success, else negative errno. | |
131 | */ | |
132 | static inline int usb_gadget_udc_start(struct usb_gadget *gadget, | |
133 | struct usb_gadget_driver *driver) | |
134 | { | |
135 | return gadget->ops->udc_start(gadget, driver); | |
136 | } | |
137 | ||
352c2dc8 SAS |
138 | /** |
139 | * usb_gadget_udc_stop - tells usb device controller we don't need it anymore | |
140 | * @gadget: The device we want to stop activity | |
141 | * @driver: The driver to unbind from @gadget | |
142 | * | |
143 | * This call is issued by the UDC Class driver after calling | |
144 | * gadget driver's unbind() method. | |
145 | * | |
146 | * The details are implementation specific, but it can go as | |
147 | * far as powering off UDC completely and disable its data | |
148 | * line pullups. | |
149 | */ | |
150 | static inline void usb_gadget_udc_stop(struct usb_gadget *gadget, | |
151 | struct usb_gadget_driver *driver) | |
152 | { | |
153 | gadget->ops->udc_stop(gadget, driver); | |
154 | } | |
155 | ||
2ccea03a FB |
156 | /** |
157 | * usb_udc_release - release the usb_udc struct | |
158 | * @dev: the dev member within usb_udc | |
159 | * | |
160 | * This is called by driver's core in order to free memory once the last | |
161 | * reference is released. | |
162 | */ | |
163 | static void usb_udc_release(struct device *dev) | |
164 | { | |
165 | struct usb_udc *udc; | |
166 | ||
167 | udc = container_of(dev, struct usb_udc, dev); | |
168 | dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); | |
169 | kfree(udc); | |
170 | } | |
171 | ||
019f976e | 172 | static const struct attribute_group *usb_udc_attr_groups[]; |
792bfcf7 FB |
173 | |
174 | static void usb_udc_nop_release(struct device *dev) | |
175 | { | |
176 | dev_vdbg(dev, "%s\n", __func__); | |
177 | } | |
178 | ||
2ccea03a | 179 | /** |
792bfcf7 FB |
180 | * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list |
181 | * @parent: the parent device to this udc. Usually the controller driver's | |
182 | * device. | |
183 | * @gadget: the gadget to be added to the list. | |
184 | * @release: a gadget release function. | |
2ccea03a FB |
185 | * |
186 | * Returns zero on success, negative errno otherwise. | |
187 | */ | |
792bfcf7 FB |
188 | int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, |
189 | void (*release)(struct device *dev)) | |
2ccea03a FB |
190 | { |
191 | struct usb_udc *udc; | |
192 | int ret = -ENOMEM; | |
193 | ||
194 | udc = kzalloc(sizeof(*udc), GFP_KERNEL); | |
195 | if (!udc) | |
196 | goto err1; | |
197 | ||
7bce401c | 198 | dev_set_name(&gadget->dev, "gadget"); |
2ed14320 | 199 | gadget->dev.parent = parent; |
f07bd56b | 200 | |
908b9613 | 201 | #ifdef CONFIG_HAS_DMA |
658c8cf1 FB |
202 | dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask); |
203 | gadget->dev.dma_parms = parent->dma_parms; | |
204 | gadget->dev.dma_mask = parent->dma_mask; | |
908b9613 | 205 | #endif |
658c8cf1 | 206 | |
ddf47ccb | 207 | if (release) |
792bfcf7 | 208 | gadget->dev.release = release; |
ddf47ccb FB |
209 | else |
210 | gadget->dev.release = usb_udc_nop_release; | |
792bfcf7 | 211 | |
7bce401c FB |
212 | ret = device_register(&gadget->dev); |
213 | if (ret) | |
214 | goto err2; | |
f07bd56b | 215 | |
2ccea03a FB |
216 | device_initialize(&udc->dev); |
217 | udc->dev.release = usb_udc_release; | |
218 | udc->dev.class = udc_class; | |
019f976e | 219 | udc->dev.groups = usb_udc_attr_groups; |
2ccea03a FB |
220 | udc->dev.parent = parent; |
221 | ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj)); | |
222 | if (ret) | |
f07bd56b | 223 | goto err3; |
2ccea03a FB |
224 | |
225 | udc->gadget = gadget; | |
226 | ||
227 | mutex_lock(&udc_lock); | |
228 | list_add_tail(&udc->list, &udc_list); | |
229 | ||
230 | ret = device_add(&udc->dev); | |
231 | if (ret) | |
f07bd56b | 232 | goto err4; |
2ccea03a | 233 | |
49401f41 | 234 | usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); |
2ccea03a FB |
235 | |
236 | mutex_unlock(&udc_lock); | |
237 | ||
238 | return 0; | |
f07bd56b FB |
239 | |
240 | err4: | |
2ccea03a FB |
241 | list_del(&udc->list); |
242 | mutex_unlock(&udc_lock); | |
243 | ||
f07bd56b | 244 | err3: |
2ccea03a FB |
245 | put_device(&udc->dev); |
246 | ||
f07bd56b | 247 | err2: |
7bce401c | 248 | put_device(&gadget->dev); |
c5dbc220 | 249 | kfree(udc); |
7bce401c | 250 | |
2ccea03a FB |
251 | err1: |
252 | return ret; | |
253 | } | |
792bfcf7 FB |
254 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release); |
255 | ||
256 | /** | |
257 | * usb_add_gadget_udc - adds a new gadget to the udc class driver list | |
258 | * @parent: the parent device to this udc. Usually the controller | |
259 | * driver's device. | |
260 | * @gadget: the gadget to be added to the list | |
261 | * | |
262 | * Returns zero on success, negative errno otherwise. | |
263 | */ | |
264 | int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget) | |
265 | { | |
266 | return usb_add_gadget_udc_release(parent, gadget, NULL); | |
267 | } | |
2ccea03a FB |
268 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc); |
269 | ||
270 | static void usb_gadget_remove_driver(struct usb_udc *udc) | |
271 | { | |
272 | dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n", | |
273 | udc->gadget->name); | |
274 | ||
275 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
276 | ||
2d7ebbb0 FB |
277 | usb_gadget_disconnect(udc->gadget); |
278 | udc->driver->disconnect(udc->gadget); | |
279 | udc->driver->unbind(udc->gadget); | |
511f3c53 | 280 | usb_gadget_udc_stop(udc->gadget, NULL); |
2ccea03a FB |
281 | |
282 | udc->driver = NULL; | |
283 | udc->dev.driver = NULL; | |
70d3a498 | 284 | udc->gadget->dev.driver = NULL; |
2ccea03a FB |
285 | } |
286 | ||
287 | /** | |
288 | * usb_del_gadget_udc - deletes @udc from udc_list | |
289 | * @gadget: the gadget to be removed. | |
290 | * | |
291 | * This, will call usb_gadget_unregister_driver() if | |
292 | * the @udc is still busy. | |
293 | */ | |
294 | void usb_del_gadget_udc(struct usb_gadget *gadget) | |
295 | { | |
296 | struct usb_udc *udc = NULL; | |
297 | ||
298 | mutex_lock(&udc_lock); | |
299 | list_for_each_entry(udc, &udc_list, list) | |
300 | if (udc->gadget == gadget) | |
301 | goto found; | |
302 | ||
303 | dev_err(gadget->dev.parent, "gadget not registered.\n"); | |
304 | mutex_unlock(&udc_lock); | |
305 | ||
306 | return; | |
307 | ||
308 | found: | |
309 | dev_vdbg(gadget->dev.parent, "unregistering gadget\n"); | |
310 | ||
311 | list_del(&udc->list); | |
312 | mutex_unlock(&udc_lock); | |
313 | ||
314 | if (udc->driver) | |
315 | usb_gadget_remove_driver(udc); | |
316 | ||
317 | kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); | |
318 | device_unregister(&udc->dev); | |
7bce401c | 319 | device_unregister(&gadget->dev); |
2ccea03a FB |
320 | } |
321 | EXPORT_SYMBOL_GPL(usb_del_gadget_udc); | |
322 | ||
323 | /* ------------------------------------------------------------------------- */ | |
324 | ||
4c49a5f0 | 325 | static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver) |
2ccea03a | 326 | { |
4c49a5f0 | 327 | int ret; |
2ccea03a | 328 | |
2ccea03a FB |
329 | dev_dbg(&udc->dev, "registering UDC driver [%s]\n", |
330 | driver->function); | |
331 | ||
332 | udc->driver = driver; | |
333 | udc->dev.driver = &driver->driver; | |
70d3a498 | 334 | udc->gadget->dev.driver = &driver->driver; |
2ccea03a | 335 | |
2d7ebbb0 FB |
336 | ret = driver->bind(udc->gadget, driver); |
337 | if (ret) | |
338 | goto err1; | |
339 | ret = usb_gadget_udc_start(udc->gadget, driver); | |
340 | if (ret) { | |
341 | driver->unbind(udc->gadget); | |
342 | goto err1; | |
352c2dc8 | 343 | } |
2d7ebbb0 | 344 | usb_gadget_connect(udc->gadget); |
2ccea03a FB |
345 | |
346 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
2ccea03a | 347 | return 0; |
2ccea03a FB |
348 | err1: |
349 | dev_err(&udc->dev, "failed to start %s: %d\n", | |
350 | udc->driver->function, ret); | |
351 | udc->driver = NULL; | |
352 | udc->dev.driver = NULL; | |
70d3a498 | 353 | udc->gadget->dev.driver = NULL; |
4c49a5f0 SAS |
354 | return ret; |
355 | } | |
356 | ||
357 | int udc_attach_driver(const char *name, struct usb_gadget_driver *driver) | |
358 | { | |
359 | struct usb_udc *udc = NULL; | |
360 | int ret = -ENODEV; | |
361 | ||
362 | mutex_lock(&udc_lock); | |
363 | list_for_each_entry(udc, &udc_list, list) { | |
364 | ret = strcmp(name, dev_name(&udc->dev)); | |
365 | if (!ret) | |
366 | break; | |
367 | } | |
368 | if (ret) { | |
369 | ret = -ENODEV; | |
370 | goto out; | |
371 | } | |
372 | if (udc->driver) { | |
373 | ret = -EBUSY; | |
374 | goto out; | |
375 | } | |
376 | ret = udc_bind_to_driver(udc, driver); | |
377 | out: | |
378 | mutex_unlock(&udc_lock); | |
379 | return ret; | |
380 | } | |
381 | EXPORT_SYMBOL_GPL(udc_attach_driver); | |
382 | ||
383 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver) | |
384 | { | |
385 | struct usb_udc *udc = NULL; | |
386 | int ret; | |
387 | ||
388 | if (!driver || !driver->bind || !driver->setup) | |
389 | return -EINVAL; | |
390 | ||
391 | mutex_lock(&udc_lock); | |
392 | list_for_each_entry(udc, &udc_list, list) { | |
393 | /* For now we take the first one */ | |
394 | if (!udc->driver) | |
395 | goto found; | |
396 | } | |
397 | ||
398 | pr_debug("couldn't find an available UDC\n"); | |
399 | mutex_unlock(&udc_lock); | |
400 | return -ENODEV; | |
401 | found: | |
402 | ret = udc_bind_to_driver(udc, driver); | |
2ccea03a FB |
403 | mutex_unlock(&udc_lock); |
404 | return ret; | |
405 | } | |
406 | EXPORT_SYMBOL_GPL(usb_gadget_probe_driver); | |
407 | ||
408 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
409 | { | |
410 | struct usb_udc *udc = NULL; | |
411 | int ret = -ENODEV; | |
412 | ||
413 | if (!driver || !driver->unbind) | |
414 | return -EINVAL; | |
415 | ||
416 | mutex_lock(&udc_lock); | |
417 | list_for_each_entry(udc, &udc_list, list) | |
418 | if (udc->driver == driver) { | |
419 | usb_gadget_remove_driver(udc); | |
420 | ret = 0; | |
421 | break; | |
422 | } | |
423 | ||
424 | mutex_unlock(&udc_lock); | |
425 | return ret; | |
426 | } | |
427 | EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver); | |
428 | ||
429 | /* ------------------------------------------------------------------------- */ | |
430 | ||
431 | static ssize_t usb_udc_srp_store(struct device *dev, | |
432 | struct device_attribute *attr, const char *buf, size_t n) | |
433 | { | |
1d91a962 | 434 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a FB |
435 | |
436 | if (sysfs_streq(buf, "1")) | |
437 | usb_gadget_wakeup(udc->gadget); | |
438 | ||
439 | return n; | |
440 | } | |
441 | static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store); | |
442 | ||
443 | static ssize_t usb_udc_softconn_store(struct device *dev, | |
444 | struct device_attribute *attr, const char *buf, size_t n) | |
445 | { | |
865569ba | 446 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a FB |
447 | |
448 | if (sysfs_streq(buf, "connect")) { | |
2d7ebbb0 | 449 | usb_gadget_udc_start(udc->gadget, udc->driver); |
2ccea03a FB |
450 | usb_gadget_connect(udc->gadget); |
451 | } else if (sysfs_streq(buf, "disconnect")) { | |
83a787a7 | 452 | usb_gadget_disconnect(udc->gadget); |
2d7ebbb0 | 453 | usb_gadget_udc_stop(udc->gadget, udc->driver); |
2ccea03a FB |
454 | } else { |
455 | dev_err(dev, "unsupported command '%s'\n", buf); | |
456 | return -EINVAL; | |
457 | } | |
458 | ||
459 | return n; | |
460 | } | |
461 | static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store); | |
462 | ||
49401f41 FB |
463 | static ssize_t usb_gadget_state_show(struct device *dev, |
464 | struct device_attribute *attr, char *buf) | |
465 | { | |
466 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
467 | struct usb_gadget *gadget = udc->gadget; | |
468 | ||
469 | return sprintf(buf, "%s\n", usb_state_string(gadget->state)); | |
470 | } | |
471 | static DEVICE_ATTR(state, S_IRUGO, usb_gadget_state_show, NULL); | |
472 | ||
d327ab5b MN |
473 | #define USB_UDC_SPEED_ATTR(name, param) \ |
474 | ssize_t usb_udc_##param##_show(struct device *dev, \ | |
475 | struct device_attribute *attr, char *buf) \ | |
476 | { \ | |
477 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ | |
478 | return snprintf(buf, PAGE_SIZE, "%s\n", \ | |
479 | usb_speed_string(udc->gadget->param)); \ | |
480 | } \ | |
a5fcb066 | 481 | static DEVICE_ATTR(name, S_IRUGO, usb_udc_##param##_show, NULL) |
d327ab5b MN |
482 | |
483 | static USB_UDC_SPEED_ATTR(current_speed, speed); | |
484 | static USB_UDC_SPEED_ATTR(maximum_speed, max_speed); | |
485 | ||
2ccea03a FB |
486 | #define USB_UDC_ATTR(name) \ |
487 | ssize_t usb_udc_##name##_show(struct device *dev, \ | |
488 | struct device_attribute *attr, char *buf) \ | |
489 | { \ | |
019f976e | 490 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ |
2ccea03a FB |
491 | struct usb_gadget *gadget = udc->gadget; \ |
492 | \ | |
493 | return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \ | |
494 | } \ | |
59d81f81 | 495 | static DEVICE_ATTR(name, S_IRUGO, usb_udc_##name##_show, NULL) |
2ccea03a | 496 | |
2ccea03a FB |
497 | static USB_UDC_ATTR(is_otg); |
498 | static USB_UDC_ATTR(is_a_peripheral); | |
499 | static USB_UDC_ATTR(b_hnp_enable); | |
500 | static USB_UDC_ATTR(a_hnp_support); | |
501 | static USB_UDC_ATTR(a_alt_hnp_support); | |
502 | ||
503 | static struct attribute *usb_udc_attrs[] = { | |
504 | &dev_attr_srp.attr, | |
505 | &dev_attr_soft_connect.attr, | |
49401f41 | 506 | &dev_attr_state.attr, |
d327ab5b MN |
507 | &dev_attr_current_speed.attr, |
508 | &dev_attr_maximum_speed.attr, | |
2ccea03a | 509 | |
2ccea03a FB |
510 | &dev_attr_is_otg.attr, |
511 | &dev_attr_is_a_peripheral.attr, | |
512 | &dev_attr_b_hnp_enable.attr, | |
513 | &dev_attr_a_hnp_support.attr, | |
514 | &dev_attr_a_alt_hnp_support.attr, | |
515 | NULL, | |
516 | }; | |
517 | ||
518 | static const struct attribute_group usb_udc_attr_group = { | |
519 | .attrs = usb_udc_attrs, | |
520 | }; | |
521 | ||
522 | static const struct attribute_group *usb_udc_attr_groups[] = { | |
523 | &usb_udc_attr_group, | |
524 | NULL, | |
525 | }; | |
526 | ||
527 | static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env) | |
528 | { | |
529 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
530 | int ret; | |
531 | ||
532 | ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name); | |
533 | if (ret) { | |
534 | dev_err(dev, "failed to add uevent USB_UDC_NAME\n"); | |
535 | return ret; | |
536 | } | |
537 | ||
538 | if (udc->driver) { | |
539 | ret = add_uevent_var(env, "USB_UDC_DRIVER=%s", | |
540 | udc->driver->function); | |
541 | if (ret) { | |
542 | dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n"); | |
543 | return ret; | |
544 | } | |
545 | } | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static int __init usb_udc_init(void) | |
551 | { | |
552 | udc_class = class_create(THIS_MODULE, "udc"); | |
553 | if (IS_ERR(udc_class)) { | |
554 | pr_err("failed to create udc class --> %ld\n", | |
555 | PTR_ERR(udc_class)); | |
556 | return PTR_ERR(udc_class); | |
557 | } | |
558 | ||
559 | udc_class->dev_uevent = usb_udc_uevent; | |
2ccea03a FB |
560 | return 0; |
561 | } | |
562 | subsys_initcall(usb_udc_init); | |
563 | ||
564 | static void __exit usb_udc_exit(void) | |
565 | { | |
566 | class_destroy(udc_class); | |
567 | } | |
568 | module_exit(usb_udc_exit); | |
569 | ||
570 | MODULE_DESCRIPTION("UDC Framework"); | |
571 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); | |
572 | MODULE_LICENSE("GPL v2"); |