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> |
5702f753 | 26 | #include <linux/workqueue.h> |
2ccea03a FB |
27 | |
28 | #include <linux/usb/ch9.h> | |
29 | #include <linux/usb/gadget.h> | |
0cfbd328 | 30 | #include <linux/usb.h> |
2ccea03a FB |
31 | |
32 | /** | |
33 | * struct usb_udc - describes one usb device controller | |
34 | * @driver - the gadget driver pointer. For use by the class code | |
35 | * @dev - the child device to the actual controller | |
36 | * @gadget - the gadget. For use by the class code | |
37 | * @list - for use by the udc class driver | |
38 | * | |
39 | * This represents the internal data structure which is used by the UDC-class | |
40 | * to hold information about udc driver and gadget together. | |
41 | */ | |
42 | struct usb_udc { | |
43 | struct usb_gadget_driver *driver; | |
44 | struct usb_gadget *gadget; | |
45 | struct device dev; | |
46 | struct list_head list; | |
47 | }; | |
48 | ||
49 | static struct class *udc_class; | |
2ccea03a FB |
50 | static LIST_HEAD(udc_list); |
51 | static DEFINE_MUTEX(udc_lock); | |
52 | ||
53 | /* ------------------------------------------------------------------------- */ | |
54 | ||
908b9613 AS |
55 | #ifdef CONFIG_HAS_DMA |
56 | ||
a698908d FB |
57 | int usb_gadget_map_request(struct usb_gadget *gadget, |
58 | struct usb_request *req, int is_in) | |
59 | { | |
60 | if (req->length == 0) | |
61 | return 0; | |
62 | ||
63 | if (req->num_sgs) { | |
64 | int mapped; | |
65 | ||
66 | mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs, | |
67 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
68 | if (mapped == 0) { | |
69 | dev_err(&gadget->dev, "failed to map SGs\n"); | |
70 | return -EFAULT; | |
71 | } | |
72 | ||
73 | req->num_mapped_sgs = mapped; | |
74 | } else { | |
75 | req->dma = dma_map_single(&gadget->dev, req->buf, req->length, | |
76 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
77 | ||
78 | if (dma_mapping_error(&gadget->dev, req->dma)) { | |
79 | dev_err(&gadget->dev, "failed to map buffer\n"); | |
80 | return -EFAULT; | |
81 | } | |
82 | } | |
83 | ||
84 | return 0; | |
85 | } | |
86 | EXPORT_SYMBOL_GPL(usb_gadget_map_request); | |
87 | ||
88 | void usb_gadget_unmap_request(struct usb_gadget *gadget, | |
89 | struct usb_request *req, int is_in) | |
90 | { | |
91 | if (req->length == 0) | |
92 | return; | |
93 | ||
94 | if (req->num_mapped_sgs) { | |
95 | dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs, | |
96 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
97 | ||
98 | req->num_mapped_sgs = 0; | |
99 | } else { | |
100 | dma_unmap_single(&gadget->dev, req->dma, req->length, | |
101 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
102 | } | |
103 | } | |
104 | EXPORT_SYMBOL_GPL(usb_gadget_unmap_request); | |
105 | ||
908b9613 AS |
106 | #endif /* CONFIG_HAS_DMA */ |
107 | ||
a698908d FB |
108 | /* ------------------------------------------------------------------------- */ |
109 | ||
3fc2aa55 MS |
110 | /** |
111 | * usb_gadget_giveback_request - give the request back to the gadget layer | |
112 | * Context: in_interrupt() | |
113 | * | |
114 | * This is called by device controller drivers in order to return the | |
115 | * completed request back to the gadget layer. | |
116 | */ | |
117 | void usb_gadget_giveback_request(struct usb_ep *ep, | |
118 | struct usb_request *req) | |
119 | { | |
0cfbd328 MS |
120 | if (likely(req->status == 0)) |
121 | usb_led_activity(USB_LED_EVENT_GADGET); | |
122 | ||
3fc2aa55 MS |
123 | req->complete(ep, req); |
124 | } | |
125 | EXPORT_SYMBOL_GPL(usb_gadget_giveback_request); | |
126 | ||
127 | /* ------------------------------------------------------------------------- */ | |
128 | ||
5702f753 FB |
129 | static void usb_gadget_state_work(struct work_struct *work) |
130 | { | |
131 | struct usb_gadget *gadget = work_to_gadget(work); | |
af54954a | 132 | struct usb_udc *udc = NULL; |
5702f753 | 133 | |
af54954a AL |
134 | mutex_lock(&udc_lock); |
135 | list_for_each_entry(udc, &udc_list, list) | |
136 | if (udc->gadget == gadget) | |
137 | goto found; | |
138 | mutex_unlock(&udc_lock); | |
139 | ||
140 | return; | |
141 | ||
142 | found: | |
143 | mutex_unlock(&udc_lock); | |
144 | ||
145 | sysfs_notify(&udc->dev.kobj, NULL, "state"); | |
5702f753 FB |
146 | } |
147 | ||
49401f41 FB |
148 | void usb_gadget_set_state(struct usb_gadget *gadget, |
149 | enum usb_device_state state) | |
150 | { | |
151 | gadget->state = state; | |
5702f753 | 152 | schedule_work(&gadget->work); |
49401f41 FB |
153 | } |
154 | EXPORT_SYMBOL_GPL(usb_gadget_set_state); | |
155 | ||
156 | /* ------------------------------------------------------------------------- */ | |
157 | ||
974a70bd PC |
158 | /** |
159 | * usb_gadget_udc_reset - notifies the udc core that bus reset occurs | |
160 | * @gadget: The gadget which bus reset occurs | |
161 | * @driver: The gadget driver we want to notify | |
162 | * | |
163 | * If the udc driver has bus reset handler, it needs to call this when the bus | |
164 | * reset occurs, it notifies the gadget driver that the bus reset occurs as | |
165 | * well as updates gadget state. | |
166 | */ | |
167 | void usb_gadget_udc_reset(struct usb_gadget *gadget, | |
168 | struct usb_gadget_driver *driver) | |
169 | { | |
170 | driver->reset(gadget); | |
171 | usb_gadget_set_state(gadget, USB_STATE_DEFAULT); | |
172 | } | |
173 | EXPORT_SYMBOL_GPL(usb_gadget_udc_reset); | |
174 | ||
352c2dc8 SAS |
175 | /** |
176 | * usb_gadget_udc_start - tells usb device controller to start up | |
177 | * @gadget: The gadget we want to get started | |
178 | * @driver: The driver we want to bind to @gadget | |
179 | * | |
180 | * This call is issued by the UDC Class driver when it's about | |
181 | * to register a gadget driver to the device controller, before | |
182 | * calling gadget driver's bind() method. | |
183 | * | |
184 | * It allows the controller to be powered off until strictly | |
185 | * necessary to have it powered on. | |
186 | * | |
187 | * Returns zero on success, else negative errno. | |
188 | */ | |
189 | static inline int usb_gadget_udc_start(struct usb_gadget *gadget, | |
190 | struct usb_gadget_driver *driver) | |
191 | { | |
192 | return gadget->ops->udc_start(gadget, driver); | |
193 | } | |
194 | ||
352c2dc8 SAS |
195 | /** |
196 | * usb_gadget_udc_stop - tells usb device controller we don't need it anymore | |
197 | * @gadget: The device we want to stop activity | |
198 | * @driver: The driver to unbind from @gadget | |
199 | * | |
200 | * This call is issued by the UDC Class driver after calling | |
201 | * gadget driver's unbind() method. | |
202 | * | |
203 | * The details are implementation specific, but it can go as | |
204 | * far as powering off UDC completely and disable its data | |
205 | * line pullups. | |
206 | */ | |
207 | static inline void usb_gadget_udc_stop(struct usb_gadget *gadget, | |
208 | struct usb_gadget_driver *driver) | |
209 | { | |
210 | gadget->ops->udc_stop(gadget, driver); | |
211 | } | |
212 | ||
2ccea03a FB |
213 | /** |
214 | * usb_udc_release - release the usb_udc struct | |
215 | * @dev: the dev member within usb_udc | |
216 | * | |
217 | * This is called by driver's core in order to free memory once the last | |
218 | * reference is released. | |
219 | */ | |
220 | static void usb_udc_release(struct device *dev) | |
221 | { | |
222 | struct usb_udc *udc; | |
223 | ||
224 | udc = container_of(dev, struct usb_udc, dev); | |
225 | dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); | |
226 | kfree(udc); | |
227 | } | |
228 | ||
019f976e | 229 | static const struct attribute_group *usb_udc_attr_groups[]; |
792bfcf7 FB |
230 | |
231 | static void usb_udc_nop_release(struct device *dev) | |
232 | { | |
233 | dev_vdbg(dev, "%s\n", __func__); | |
234 | } | |
235 | ||
2ccea03a | 236 | /** |
792bfcf7 FB |
237 | * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list |
238 | * @parent: the parent device to this udc. Usually the controller driver's | |
239 | * device. | |
240 | * @gadget: the gadget to be added to the list. | |
241 | * @release: a gadget release function. | |
2ccea03a FB |
242 | * |
243 | * Returns zero on success, negative errno otherwise. | |
244 | */ | |
792bfcf7 FB |
245 | int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, |
246 | void (*release)(struct device *dev)) | |
2ccea03a FB |
247 | { |
248 | struct usb_udc *udc; | |
249 | int ret = -ENOMEM; | |
250 | ||
251 | udc = kzalloc(sizeof(*udc), GFP_KERNEL); | |
252 | if (!udc) | |
253 | goto err1; | |
254 | ||
7bce401c | 255 | dev_set_name(&gadget->dev, "gadget"); |
5702f753 | 256 | INIT_WORK(&gadget->work, usb_gadget_state_work); |
2ed14320 | 257 | gadget->dev.parent = parent; |
f07bd56b | 258 | |
908b9613 | 259 | #ifdef CONFIG_HAS_DMA |
658c8cf1 FB |
260 | dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask); |
261 | gadget->dev.dma_parms = parent->dma_parms; | |
262 | gadget->dev.dma_mask = parent->dma_mask; | |
908b9613 | 263 | #endif |
658c8cf1 | 264 | |
ddf47ccb | 265 | if (release) |
792bfcf7 | 266 | gadget->dev.release = release; |
ddf47ccb FB |
267 | else |
268 | gadget->dev.release = usb_udc_nop_release; | |
792bfcf7 | 269 | |
7bce401c FB |
270 | ret = device_register(&gadget->dev); |
271 | if (ret) | |
272 | goto err2; | |
f07bd56b | 273 | |
2ccea03a FB |
274 | device_initialize(&udc->dev); |
275 | udc->dev.release = usb_udc_release; | |
276 | udc->dev.class = udc_class; | |
019f976e | 277 | udc->dev.groups = usb_udc_attr_groups; |
2ccea03a FB |
278 | udc->dev.parent = parent; |
279 | ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj)); | |
280 | if (ret) | |
f07bd56b | 281 | goto err3; |
2ccea03a FB |
282 | |
283 | udc->gadget = gadget; | |
284 | ||
285 | mutex_lock(&udc_lock); | |
286 | list_add_tail(&udc->list, &udc_list); | |
287 | ||
288 | ret = device_add(&udc->dev); | |
289 | if (ret) | |
f07bd56b | 290 | goto err4; |
2ccea03a | 291 | |
49401f41 | 292 | usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); |
2ccea03a FB |
293 | |
294 | mutex_unlock(&udc_lock); | |
295 | ||
296 | return 0; | |
f07bd56b FB |
297 | |
298 | err4: | |
2ccea03a FB |
299 | list_del(&udc->list); |
300 | mutex_unlock(&udc_lock); | |
301 | ||
f07bd56b | 302 | err3: |
2ccea03a FB |
303 | put_device(&udc->dev); |
304 | ||
f07bd56b | 305 | err2: |
7bce401c | 306 | put_device(&gadget->dev); |
c5dbc220 | 307 | kfree(udc); |
7bce401c | 308 | |
2ccea03a FB |
309 | err1: |
310 | return ret; | |
311 | } | |
792bfcf7 FB |
312 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release); |
313 | ||
314 | /** | |
315 | * usb_add_gadget_udc - adds a new gadget to the udc class driver list | |
316 | * @parent: the parent device to this udc. Usually the controller | |
317 | * driver's device. | |
318 | * @gadget: the gadget to be added to the list | |
319 | * | |
320 | * Returns zero on success, negative errno otherwise. | |
321 | */ | |
322 | int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget) | |
323 | { | |
324 | return usb_add_gadget_udc_release(parent, gadget, NULL); | |
325 | } | |
2ccea03a FB |
326 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc); |
327 | ||
328 | static void usb_gadget_remove_driver(struct usb_udc *udc) | |
329 | { | |
330 | dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n", | |
331 | udc->gadget->name); | |
332 | ||
333 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
334 | ||
2d7ebbb0 FB |
335 | usb_gadget_disconnect(udc->gadget); |
336 | udc->driver->disconnect(udc->gadget); | |
337 | udc->driver->unbind(udc->gadget); | |
511f3c53 | 338 | usb_gadget_udc_stop(udc->gadget, NULL); |
2ccea03a FB |
339 | |
340 | udc->driver = NULL; | |
341 | udc->dev.driver = NULL; | |
70d3a498 | 342 | udc->gadget->dev.driver = NULL; |
2ccea03a FB |
343 | } |
344 | ||
345 | /** | |
346 | * usb_del_gadget_udc - deletes @udc from udc_list | |
347 | * @gadget: the gadget to be removed. | |
348 | * | |
349 | * This, will call usb_gadget_unregister_driver() if | |
350 | * the @udc is still busy. | |
351 | */ | |
352 | void usb_del_gadget_udc(struct usb_gadget *gadget) | |
353 | { | |
354 | struct usb_udc *udc = NULL; | |
355 | ||
356 | mutex_lock(&udc_lock); | |
357 | list_for_each_entry(udc, &udc_list, list) | |
358 | if (udc->gadget == gadget) | |
359 | goto found; | |
360 | ||
361 | dev_err(gadget->dev.parent, "gadget not registered.\n"); | |
362 | mutex_unlock(&udc_lock); | |
363 | ||
364 | return; | |
365 | ||
366 | found: | |
367 | dev_vdbg(gadget->dev.parent, "unregistering gadget\n"); | |
368 | ||
369 | list_del(&udc->list); | |
370 | mutex_unlock(&udc_lock); | |
371 | ||
372 | if (udc->driver) | |
373 | usb_gadget_remove_driver(udc); | |
374 | ||
375 | kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); | |
5702f753 | 376 | flush_work(&gadget->work); |
2ccea03a | 377 | device_unregister(&udc->dev); |
7bce401c | 378 | device_unregister(&gadget->dev); |
2ccea03a FB |
379 | } |
380 | EXPORT_SYMBOL_GPL(usb_del_gadget_udc); | |
381 | ||
382 | /* ------------------------------------------------------------------------- */ | |
383 | ||
4c49a5f0 | 384 | static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver) |
2ccea03a | 385 | { |
4c49a5f0 | 386 | int ret; |
2ccea03a | 387 | |
2ccea03a FB |
388 | dev_dbg(&udc->dev, "registering UDC driver [%s]\n", |
389 | driver->function); | |
390 | ||
391 | udc->driver = driver; | |
392 | udc->dev.driver = &driver->driver; | |
70d3a498 | 393 | udc->gadget->dev.driver = &driver->driver; |
2ccea03a | 394 | |
2d7ebbb0 FB |
395 | ret = driver->bind(udc->gadget, driver); |
396 | if (ret) | |
397 | goto err1; | |
398 | ret = usb_gadget_udc_start(udc->gadget, driver); | |
399 | if (ret) { | |
400 | driver->unbind(udc->gadget); | |
401 | goto err1; | |
352c2dc8 | 402 | } |
2d7ebbb0 | 403 | usb_gadget_connect(udc->gadget); |
2ccea03a FB |
404 | |
405 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
2ccea03a | 406 | return 0; |
2ccea03a | 407 | err1: |
f8cffc84 FE |
408 | if (ret != -EISNAM) |
409 | dev_err(&udc->dev, "failed to start %s: %d\n", | |
2ccea03a FB |
410 | udc->driver->function, ret); |
411 | udc->driver = NULL; | |
412 | udc->dev.driver = NULL; | |
70d3a498 | 413 | udc->gadget->dev.driver = NULL; |
4c49a5f0 SAS |
414 | return ret; |
415 | } | |
416 | ||
417 | int udc_attach_driver(const char *name, struct usb_gadget_driver *driver) | |
418 | { | |
419 | struct usb_udc *udc = NULL; | |
420 | int ret = -ENODEV; | |
421 | ||
422 | mutex_lock(&udc_lock); | |
423 | list_for_each_entry(udc, &udc_list, list) { | |
424 | ret = strcmp(name, dev_name(&udc->dev)); | |
425 | if (!ret) | |
426 | break; | |
427 | } | |
428 | if (ret) { | |
429 | ret = -ENODEV; | |
430 | goto out; | |
431 | } | |
432 | if (udc->driver) { | |
433 | ret = -EBUSY; | |
434 | goto out; | |
435 | } | |
436 | ret = udc_bind_to_driver(udc, driver); | |
437 | out: | |
438 | mutex_unlock(&udc_lock); | |
439 | return ret; | |
440 | } | |
441 | EXPORT_SYMBOL_GPL(udc_attach_driver); | |
442 | ||
443 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver) | |
444 | { | |
445 | struct usb_udc *udc = NULL; | |
446 | int ret; | |
447 | ||
448 | if (!driver || !driver->bind || !driver->setup) | |
449 | return -EINVAL; | |
450 | ||
451 | mutex_lock(&udc_lock); | |
452 | list_for_each_entry(udc, &udc_list, list) { | |
453 | /* For now we take the first one */ | |
454 | if (!udc->driver) | |
455 | goto found; | |
456 | } | |
457 | ||
458 | pr_debug("couldn't find an available UDC\n"); | |
459 | mutex_unlock(&udc_lock); | |
460 | return -ENODEV; | |
461 | found: | |
462 | ret = udc_bind_to_driver(udc, driver); | |
2ccea03a FB |
463 | mutex_unlock(&udc_lock); |
464 | return ret; | |
465 | } | |
466 | EXPORT_SYMBOL_GPL(usb_gadget_probe_driver); | |
467 | ||
468 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
469 | { | |
470 | struct usb_udc *udc = NULL; | |
471 | int ret = -ENODEV; | |
472 | ||
473 | if (!driver || !driver->unbind) | |
474 | return -EINVAL; | |
475 | ||
476 | mutex_lock(&udc_lock); | |
477 | list_for_each_entry(udc, &udc_list, list) | |
478 | if (udc->driver == driver) { | |
479 | usb_gadget_remove_driver(udc); | |
b5fb8d0a PC |
480 | usb_gadget_set_state(udc->gadget, |
481 | USB_STATE_NOTATTACHED); | |
2ccea03a FB |
482 | ret = 0; |
483 | break; | |
484 | } | |
485 | ||
486 | mutex_unlock(&udc_lock); | |
487 | return ret; | |
488 | } | |
489 | EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver); | |
490 | ||
491 | /* ------------------------------------------------------------------------- */ | |
492 | ||
493 | static ssize_t usb_udc_srp_store(struct device *dev, | |
494 | struct device_attribute *attr, const char *buf, size_t n) | |
495 | { | |
1d91a962 | 496 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a FB |
497 | |
498 | if (sysfs_streq(buf, "1")) | |
499 | usb_gadget_wakeup(udc->gadget); | |
500 | ||
501 | return n; | |
502 | } | |
503 | static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store); | |
504 | ||
505 | static ssize_t usb_udc_softconn_store(struct device *dev, | |
506 | struct device_attribute *attr, const char *buf, size_t n) | |
507 | { | |
865569ba | 508 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a FB |
509 | |
510 | if (sysfs_streq(buf, "connect")) { | |
2d7ebbb0 | 511 | usb_gadget_udc_start(udc->gadget, udc->driver); |
2ccea03a FB |
512 | usb_gadget_connect(udc->gadget); |
513 | } else if (sysfs_streq(buf, "disconnect")) { | |
83a787a7 | 514 | usb_gadget_disconnect(udc->gadget); |
2d7ebbb0 | 515 | usb_gadget_udc_stop(udc->gadget, udc->driver); |
2ccea03a FB |
516 | } else { |
517 | dev_err(dev, "unsupported command '%s'\n", buf); | |
518 | return -EINVAL; | |
519 | } | |
520 | ||
521 | return n; | |
522 | } | |
523 | static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store); | |
524 | ||
ce26bd23 GKH |
525 | static ssize_t state_show(struct device *dev, struct device_attribute *attr, |
526 | char *buf) | |
49401f41 FB |
527 | { |
528 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
529 | struct usb_gadget *gadget = udc->gadget; | |
530 | ||
531 | return sprintf(buf, "%s\n", usb_state_string(gadget->state)); | |
532 | } | |
ce26bd23 | 533 | static DEVICE_ATTR_RO(state); |
49401f41 | 534 | |
d327ab5b | 535 | #define USB_UDC_SPEED_ATTR(name, param) \ |
ce26bd23 | 536 | ssize_t name##_show(struct device *dev, \ |
d327ab5b MN |
537 | struct device_attribute *attr, char *buf) \ |
538 | { \ | |
539 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ | |
540 | return snprintf(buf, PAGE_SIZE, "%s\n", \ | |
541 | usb_speed_string(udc->gadget->param)); \ | |
542 | } \ | |
ce26bd23 | 543 | static DEVICE_ATTR_RO(name) |
d327ab5b MN |
544 | |
545 | static USB_UDC_SPEED_ATTR(current_speed, speed); | |
546 | static USB_UDC_SPEED_ATTR(maximum_speed, max_speed); | |
547 | ||
2ccea03a | 548 | #define USB_UDC_ATTR(name) \ |
ce26bd23 | 549 | ssize_t name##_show(struct device *dev, \ |
2ccea03a FB |
550 | struct device_attribute *attr, char *buf) \ |
551 | { \ | |
019f976e | 552 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ |
2ccea03a FB |
553 | struct usb_gadget *gadget = udc->gadget; \ |
554 | \ | |
555 | return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \ | |
556 | } \ | |
ce26bd23 | 557 | static DEVICE_ATTR_RO(name) |
2ccea03a | 558 | |
2ccea03a FB |
559 | static USB_UDC_ATTR(is_otg); |
560 | static USB_UDC_ATTR(is_a_peripheral); | |
561 | static USB_UDC_ATTR(b_hnp_enable); | |
562 | static USB_UDC_ATTR(a_hnp_support); | |
563 | static USB_UDC_ATTR(a_alt_hnp_support); | |
564 | ||
565 | static struct attribute *usb_udc_attrs[] = { | |
566 | &dev_attr_srp.attr, | |
567 | &dev_attr_soft_connect.attr, | |
49401f41 | 568 | &dev_attr_state.attr, |
d327ab5b MN |
569 | &dev_attr_current_speed.attr, |
570 | &dev_attr_maximum_speed.attr, | |
2ccea03a | 571 | |
2ccea03a FB |
572 | &dev_attr_is_otg.attr, |
573 | &dev_attr_is_a_peripheral.attr, | |
574 | &dev_attr_b_hnp_enable.attr, | |
575 | &dev_attr_a_hnp_support.attr, | |
576 | &dev_attr_a_alt_hnp_support.attr, | |
577 | NULL, | |
578 | }; | |
579 | ||
580 | static const struct attribute_group usb_udc_attr_group = { | |
581 | .attrs = usb_udc_attrs, | |
582 | }; | |
583 | ||
584 | static const struct attribute_group *usb_udc_attr_groups[] = { | |
585 | &usb_udc_attr_group, | |
586 | NULL, | |
587 | }; | |
588 | ||
589 | static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env) | |
590 | { | |
591 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
592 | int ret; | |
593 | ||
594 | ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name); | |
595 | if (ret) { | |
596 | dev_err(dev, "failed to add uevent USB_UDC_NAME\n"); | |
597 | return ret; | |
598 | } | |
599 | ||
600 | if (udc->driver) { | |
601 | ret = add_uevent_var(env, "USB_UDC_DRIVER=%s", | |
602 | udc->driver->function); | |
603 | if (ret) { | |
604 | dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n"); | |
605 | return ret; | |
606 | } | |
607 | } | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | static int __init usb_udc_init(void) | |
613 | { | |
614 | udc_class = class_create(THIS_MODULE, "udc"); | |
615 | if (IS_ERR(udc_class)) { | |
616 | pr_err("failed to create udc class --> %ld\n", | |
617 | PTR_ERR(udc_class)); | |
618 | return PTR_ERR(udc_class); | |
619 | } | |
620 | ||
621 | udc_class->dev_uevent = usb_udc_uevent; | |
2ccea03a FB |
622 | return 0; |
623 | } | |
624 | subsys_initcall(usb_udc_init); | |
625 | ||
626 | static void __exit usb_udc_exit(void) | |
627 | { | |
628 | class_destroy(udc_class); | |
629 | } | |
630 | module_exit(usb_udc_exit); | |
631 | ||
632 | MODULE_DESCRIPTION("UDC Framework"); | |
633 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); | |
634 | MODULE_LICENSE("GPL v2"); |