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 | |
628ef0d2 PC |
38 | * @vbus - for udcs who care about vbus status, this value is real vbus status; |
39 | * for udcs who do not care about vbus status, this value is always true | |
2ccea03a FB |
40 | * |
41 | * This represents the internal data structure which is used by the UDC-class | |
42 | * to hold information about udc driver and gadget together. | |
43 | */ | |
44 | struct usb_udc { | |
45 | struct usb_gadget_driver *driver; | |
46 | struct usb_gadget *gadget; | |
47 | struct device dev; | |
48 | struct list_head list; | |
628ef0d2 | 49 | bool vbus; |
2ccea03a FB |
50 | }; |
51 | ||
52 | static struct class *udc_class; | |
2ccea03a FB |
53 | static LIST_HEAD(udc_list); |
54 | static DEFINE_MUTEX(udc_lock); | |
55 | ||
56 | /* ------------------------------------------------------------------------- */ | |
57 | ||
908b9613 AS |
58 | #ifdef CONFIG_HAS_DMA |
59 | ||
a698908d FB |
60 | int usb_gadget_map_request(struct usb_gadget *gadget, |
61 | struct usb_request *req, int is_in) | |
62 | { | |
7ace8fc8 YS |
63 | struct device *dev = gadget->dev.parent; |
64 | ||
a698908d FB |
65 | if (req->length == 0) |
66 | return 0; | |
67 | ||
68 | if (req->num_sgs) { | |
69 | int mapped; | |
70 | ||
7ace8fc8 | 71 | mapped = dma_map_sg(dev, req->sg, req->num_sgs, |
a698908d FB |
72 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
73 | if (mapped == 0) { | |
74 | dev_err(&gadget->dev, "failed to map SGs\n"); | |
75 | return -EFAULT; | |
76 | } | |
77 | ||
78 | req->num_mapped_sgs = mapped; | |
79 | } else { | |
7ace8fc8 | 80 | req->dma = dma_map_single(dev, req->buf, req->length, |
a698908d FB |
81 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
82 | ||
7ace8fc8 YS |
83 | if (dma_mapping_error(dev, req->dma)) { |
84 | dev_err(dev, "failed to map buffer\n"); | |
a698908d FB |
85 | return -EFAULT; |
86 | } | |
87 | } | |
88 | ||
89 | return 0; | |
90 | } | |
91 | EXPORT_SYMBOL_GPL(usb_gadget_map_request); | |
92 | ||
93 | void usb_gadget_unmap_request(struct usb_gadget *gadget, | |
94 | struct usb_request *req, int is_in) | |
95 | { | |
96 | if (req->length == 0) | |
97 | return; | |
98 | ||
99 | if (req->num_mapped_sgs) { | |
7ace8fc8 | 100 | dma_unmap_sg(gadget->dev.parent, req->sg, req->num_mapped_sgs, |
a698908d FB |
101 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
102 | ||
103 | req->num_mapped_sgs = 0; | |
104 | } else { | |
7ace8fc8 | 105 | dma_unmap_single(gadget->dev.parent, req->dma, req->length, |
a698908d FB |
106 | is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
107 | } | |
108 | } | |
109 | EXPORT_SYMBOL_GPL(usb_gadget_unmap_request); | |
110 | ||
908b9613 AS |
111 | #endif /* CONFIG_HAS_DMA */ |
112 | ||
a698908d FB |
113 | /* ------------------------------------------------------------------------- */ |
114 | ||
3fc2aa55 MS |
115 | /** |
116 | * usb_gadget_giveback_request - give the request back to the gadget layer | |
117 | * Context: in_interrupt() | |
118 | * | |
119 | * This is called by device controller drivers in order to return the | |
120 | * completed request back to the gadget layer. | |
121 | */ | |
122 | void usb_gadget_giveback_request(struct usb_ep *ep, | |
123 | struct usb_request *req) | |
124 | { | |
0cfbd328 MS |
125 | if (likely(req->status == 0)) |
126 | usb_led_activity(USB_LED_EVENT_GADGET); | |
127 | ||
3fc2aa55 MS |
128 | req->complete(ep, req); |
129 | } | |
130 | EXPORT_SYMBOL_GPL(usb_gadget_giveback_request); | |
131 | ||
132 | /* ------------------------------------------------------------------------- */ | |
133 | ||
5702f753 FB |
134 | static void usb_gadget_state_work(struct work_struct *work) |
135 | { | |
dfea9c94 PC |
136 | struct usb_gadget *gadget = work_to_gadget(work); |
137 | struct usb_udc *udc = gadget->udc; | |
5702f753 | 138 | |
dfea9c94 PC |
139 | if (udc) |
140 | sysfs_notify(&udc->dev.kobj, NULL, "state"); | |
5702f753 FB |
141 | } |
142 | ||
49401f41 FB |
143 | void usb_gadget_set_state(struct usb_gadget *gadget, |
144 | enum usb_device_state state) | |
145 | { | |
146 | gadget->state = state; | |
5702f753 | 147 | schedule_work(&gadget->work); |
49401f41 FB |
148 | } |
149 | EXPORT_SYMBOL_GPL(usb_gadget_set_state); | |
150 | ||
151 | /* ------------------------------------------------------------------------- */ | |
152 | ||
628ef0d2 PC |
153 | static void usb_udc_connect_control(struct usb_udc *udc) |
154 | { | |
155 | if (udc->vbus) | |
156 | usb_gadget_connect(udc->gadget); | |
157 | else | |
158 | usb_gadget_disconnect(udc->gadget); | |
159 | } | |
160 | ||
161 | /** | |
162 | * usb_udc_vbus_handler - updates the udc core vbus status, and try to | |
163 | * connect or disconnect gadget | |
164 | * @gadget: The gadget which vbus change occurs | |
165 | * @status: The vbus status | |
166 | * | |
167 | * The udc driver calls it when it wants to connect or disconnect gadget | |
168 | * according to vbus status. | |
169 | */ | |
170 | void usb_udc_vbus_handler(struct usb_gadget *gadget, bool status) | |
171 | { | |
172 | struct usb_udc *udc = gadget->udc; | |
173 | ||
174 | if (udc) { | |
175 | udc->vbus = status; | |
176 | usb_udc_connect_control(udc); | |
177 | } | |
178 | } | |
179 | EXPORT_SYMBOL_GPL(usb_udc_vbus_handler); | |
180 | ||
974a70bd PC |
181 | /** |
182 | * usb_gadget_udc_reset - notifies the udc core that bus reset occurs | |
183 | * @gadget: The gadget which bus reset occurs | |
184 | * @driver: The gadget driver we want to notify | |
185 | * | |
186 | * If the udc driver has bus reset handler, it needs to call this when the bus | |
187 | * reset occurs, it notifies the gadget driver that the bus reset occurs as | |
188 | * well as updates gadget state. | |
189 | */ | |
190 | void usb_gadget_udc_reset(struct usb_gadget *gadget, | |
191 | struct usb_gadget_driver *driver) | |
192 | { | |
193 | driver->reset(gadget); | |
194 | usb_gadget_set_state(gadget, USB_STATE_DEFAULT); | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(usb_gadget_udc_reset); | |
197 | ||
352c2dc8 SAS |
198 | /** |
199 | * usb_gadget_udc_start - tells usb device controller to start up | |
2c683347 | 200 | * @udc: The UDC to be started |
352c2dc8 SAS |
201 | * |
202 | * This call is issued by the UDC Class driver when it's about | |
203 | * to register a gadget driver to the device controller, before | |
204 | * calling gadget driver's bind() method. | |
205 | * | |
206 | * It allows the controller to be powered off until strictly | |
207 | * necessary to have it powered on. | |
208 | * | |
209 | * Returns zero on success, else negative errno. | |
210 | */ | |
2c683347 | 211 | static inline int usb_gadget_udc_start(struct usb_udc *udc) |
352c2dc8 | 212 | { |
2c683347 | 213 | return udc->gadget->ops->udc_start(udc->gadget, udc->driver); |
352c2dc8 SAS |
214 | } |
215 | ||
352c2dc8 SAS |
216 | /** |
217 | * usb_gadget_udc_stop - tells usb device controller we don't need it anymore | |
218 | * @gadget: The device we want to stop activity | |
219 | * @driver: The driver to unbind from @gadget | |
220 | * | |
221 | * This call is issued by the UDC Class driver after calling | |
222 | * gadget driver's unbind() method. | |
223 | * | |
224 | * The details are implementation specific, but it can go as | |
225 | * far as powering off UDC completely and disable its data | |
226 | * line pullups. | |
227 | */ | |
2c683347 | 228 | static inline void usb_gadget_udc_stop(struct usb_udc *udc) |
352c2dc8 | 229 | { |
22835b80 | 230 | udc->gadget->ops->udc_stop(udc->gadget); |
352c2dc8 SAS |
231 | } |
232 | ||
2ccea03a FB |
233 | /** |
234 | * usb_udc_release - release the usb_udc struct | |
235 | * @dev: the dev member within usb_udc | |
236 | * | |
237 | * This is called by driver's core in order to free memory once the last | |
238 | * reference is released. | |
239 | */ | |
240 | static void usb_udc_release(struct device *dev) | |
241 | { | |
242 | struct usb_udc *udc; | |
243 | ||
244 | udc = container_of(dev, struct usb_udc, dev); | |
245 | dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); | |
246 | kfree(udc); | |
247 | } | |
248 | ||
019f976e | 249 | static const struct attribute_group *usb_udc_attr_groups[]; |
792bfcf7 FB |
250 | |
251 | static void usb_udc_nop_release(struct device *dev) | |
252 | { | |
253 | dev_vdbg(dev, "%s\n", __func__); | |
254 | } | |
255 | ||
2ccea03a | 256 | /** |
792bfcf7 FB |
257 | * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list |
258 | * @parent: the parent device to this udc. Usually the controller driver's | |
259 | * device. | |
260 | * @gadget: the gadget to be added to the list. | |
261 | * @release: a gadget release function. | |
2ccea03a FB |
262 | * |
263 | * Returns zero on success, negative errno otherwise. | |
264 | */ | |
792bfcf7 FB |
265 | int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, |
266 | void (*release)(struct device *dev)) | |
2ccea03a FB |
267 | { |
268 | struct usb_udc *udc; | |
269 | int ret = -ENOMEM; | |
270 | ||
271 | udc = kzalloc(sizeof(*udc), GFP_KERNEL); | |
272 | if (!udc) | |
273 | goto err1; | |
274 | ||
7bce401c | 275 | dev_set_name(&gadget->dev, "gadget"); |
5702f753 | 276 | INIT_WORK(&gadget->work, usb_gadget_state_work); |
2ed14320 | 277 | gadget->dev.parent = parent; |
f07bd56b | 278 | |
908b9613 | 279 | #ifdef CONFIG_HAS_DMA |
658c8cf1 FB |
280 | dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask); |
281 | gadget->dev.dma_parms = parent->dma_parms; | |
282 | gadget->dev.dma_mask = parent->dma_mask; | |
908b9613 | 283 | #endif |
658c8cf1 | 284 | |
ddf47ccb | 285 | if (release) |
792bfcf7 | 286 | gadget->dev.release = release; |
ddf47ccb FB |
287 | else |
288 | gadget->dev.release = usb_udc_nop_release; | |
792bfcf7 | 289 | |
7bce401c FB |
290 | ret = device_register(&gadget->dev); |
291 | if (ret) | |
292 | goto err2; | |
f07bd56b | 293 | |
2ccea03a FB |
294 | device_initialize(&udc->dev); |
295 | udc->dev.release = usb_udc_release; | |
296 | udc->dev.class = udc_class; | |
019f976e | 297 | udc->dev.groups = usb_udc_attr_groups; |
2ccea03a FB |
298 | udc->dev.parent = parent; |
299 | ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj)); | |
300 | if (ret) | |
f07bd56b | 301 | goto err3; |
2ccea03a FB |
302 | |
303 | udc->gadget = gadget; | |
dfea9c94 | 304 | gadget->udc = udc; |
2ccea03a FB |
305 | |
306 | mutex_lock(&udc_lock); | |
307 | list_add_tail(&udc->list, &udc_list); | |
308 | ||
309 | ret = device_add(&udc->dev); | |
310 | if (ret) | |
f07bd56b | 311 | goto err4; |
2ccea03a | 312 | |
49401f41 | 313 | usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); |
628ef0d2 | 314 | udc->vbus = true; |
2ccea03a FB |
315 | |
316 | mutex_unlock(&udc_lock); | |
317 | ||
318 | return 0; | |
f07bd56b FB |
319 | |
320 | err4: | |
2ccea03a FB |
321 | list_del(&udc->list); |
322 | mutex_unlock(&udc_lock); | |
323 | ||
f07bd56b | 324 | err3: |
2ccea03a | 325 | put_device(&udc->dev); |
c93e64e9 | 326 | device_del(&gadget->dev); |
2ccea03a | 327 | |
f07bd56b | 328 | err2: |
7bce401c | 329 | put_device(&gadget->dev); |
c5dbc220 | 330 | kfree(udc); |
7bce401c | 331 | |
2ccea03a FB |
332 | err1: |
333 | return ret; | |
334 | } | |
792bfcf7 FB |
335 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release); |
336 | ||
337 | /** | |
338 | * usb_add_gadget_udc - adds a new gadget to the udc class driver list | |
339 | * @parent: the parent device to this udc. Usually the controller | |
340 | * driver's device. | |
341 | * @gadget: the gadget to be added to the list | |
342 | * | |
343 | * Returns zero on success, negative errno otherwise. | |
344 | */ | |
345 | int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget) | |
346 | { | |
347 | return usb_add_gadget_udc_release(parent, gadget, NULL); | |
348 | } | |
2ccea03a FB |
349 | EXPORT_SYMBOL_GPL(usb_add_gadget_udc); |
350 | ||
351 | static void usb_gadget_remove_driver(struct usb_udc *udc) | |
352 | { | |
353 | dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n", | |
8da9fe8a | 354 | udc->driver->function); |
2ccea03a FB |
355 | |
356 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
357 | ||
2d7ebbb0 FB |
358 | usb_gadget_disconnect(udc->gadget); |
359 | udc->driver->disconnect(udc->gadget); | |
360 | udc->driver->unbind(udc->gadget); | |
2c683347 | 361 | usb_gadget_udc_stop(udc); |
2ccea03a FB |
362 | |
363 | udc->driver = NULL; | |
364 | udc->dev.driver = NULL; | |
70d3a498 | 365 | udc->gadget->dev.driver = NULL; |
2ccea03a FB |
366 | } |
367 | ||
368 | /** | |
369 | * usb_del_gadget_udc - deletes @udc from udc_list | |
370 | * @gadget: the gadget to be removed. | |
371 | * | |
372 | * This, will call usb_gadget_unregister_driver() if | |
373 | * the @udc is still busy. | |
374 | */ | |
375 | void usb_del_gadget_udc(struct usb_gadget *gadget) | |
376 | { | |
dfea9c94 | 377 | struct usb_udc *udc = gadget->udc; |
2ccea03a | 378 | |
dfea9c94 PC |
379 | if (!udc) |
380 | return; | |
2ccea03a | 381 | |
2ccea03a FB |
382 | dev_vdbg(gadget->dev.parent, "unregistering gadget\n"); |
383 | ||
dfea9c94 | 384 | mutex_lock(&udc_lock); |
2ccea03a FB |
385 | list_del(&udc->list); |
386 | mutex_unlock(&udc_lock); | |
387 | ||
388 | if (udc->driver) | |
389 | usb_gadget_remove_driver(udc); | |
390 | ||
391 | kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); | |
5702f753 | 392 | flush_work(&gadget->work); |
2ccea03a | 393 | device_unregister(&udc->dev); |
7bce401c | 394 | device_unregister(&gadget->dev); |
2ccea03a FB |
395 | } |
396 | EXPORT_SYMBOL_GPL(usb_del_gadget_udc); | |
397 | ||
398 | /* ------------------------------------------------------------------------- */ | |
399 | ||
4c49a5f0 | 400 | static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver) |
2ccea03a | 401 | { |
4c49a5f0 | 402 | int ret; |
2ccea03a | 403 | |
2ccea03a FB |
404 | dev_dbg(&udc->dev, "registering UDC driver [%s]\n", |
405 | driver->function); | |
406 | ||
407 | udc->driver = driver; | |
408 | udc->dev.driver = &driver->driver; | |
70d3a498 | 409 | udc->gadget->dev.driver = &driver->driver; |
2ccea03a | 410 | |
2d7ebbb0 FB |
411 | ret = driver->bind(udc->gadget, driver); |
412 | if (ret) | |
413 | goto err1; | |
2c683347 | 414 | ret = usb_gadget_udc_start(udc); |
2d7ebbb0 FB |
415 | if (ret) { |
416 | driver->unbind(udc->gadget); | |
417 | goto err1; | |
352c2dc8 | 418 | } |
628ef0d2 | 419 | usb_udc_connect_control(udc); |
2ccea03a FB |
420 | |
421 | kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); | |
2ccea03a | 422 | return 0; |
2ccea03a | 423 | err1: |
f8cffc84 FE |
424 | if (ret != -EISNAM) |
425 | dev_err(&udc->dev, "failed to start %s: %d\n", | |
2ccea03a FB |
426 | udc->driver->function, ret); |
427 | udc->driver = NULL; | |
428 | udc->dev.driver = NULL; | |
70d3a498 | 429 | udc->gadget->dev.driver = NULL; |
4c49a5f0 SAS |
430 | return ret; |
431 | } | |
432 | ||
02e8c966 | 433 | int usb_udc_attach_driver(const char *name, struct usb_gadget_driver *driver) |
4c49a5f0 SAS |
434 | { |
435 | struct usb_udc *udc = NULL; | |
436 | int ret = -ENODEV; | |
437 | ||
438 | mutex_lock(&udc_lock); | |
439 | list_for_each_entry(udc, &udc_list, list) { | |
440 | ret = strcmp(name, dev_name(&udc->dev)); | |
441 | if (!ret) | |
442 | break; | |
443 | } | |
444 | if (ret) { | |
445 | ret = -ENODEV; | |
446 | goto out; | |
447 | } | |
448 | if (udc->driver) { | |
449 | ret = -EBUSY; | |
450 | goto out; | |
451 | } | |
452 | ret = udc_bind_to_driver(udc, driver); | |
453 | out: | |
454 | mutex_unlock(&udc_lock); | |
455 | return ret; | |
456 | } | |
02e8c966 | 457 | EXPORT_SYMBOL_GPL(usb_udc_attach_driver); |
4c49a5f0 SAS |
458 | |
459 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver) | |
460 | { | |
461 | struct usb_udc *udc = NULL; | |
462 | int ret; | |
463 | ||
464 | if (!driver || !driver->bind || !driver->setup) | |
465 | return -EINVAL; | |
466 | ||
467 | mutex_lock(&udc_lock); | |
468 | list_for_each_entry(udc, &udc_list, list) { | |
469 | /* For now we take the first one */ | |
470 | if (!udc->driver) | |
471 | goto found; | |
472 | } | |
473 | ||
474 | pr_debug("couldn't find an available UDC\n"); | |
475 | mutex_unlock(&udc_lock); | |
476 | return -ENODEV; | |
477 | found: | |
478 | ret = udc_bind_to_driver(udc, driver); | |
2ccea03a FB |
479 | mutex_unlock(&udc_lock); |
480 | return ret; | |
481 | } | |
482 | EXPORT_SYMBOL_GPL(usb_gadget_probe_driver); | |
483 | ||
484 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
485 | { | |
486 | struct usb_udc *udc = NULL; | |
487 | int ret = -ENODEV; | |
488 | ||
489 | if (!driver || !driver->unbind) | |
490 | return -EINVAL; | |
491 | ||
492 | mutex_lock(&udc_lock); | |
493 | list_for_each_entry(udc, &udc_list, list) | |
494 | if (udc->driver == driver) { | |
495 | usb_gadget_remove_driver(udc); | |
b5fb8d0a PC |
496 | usb_gadget_set_state(udc->gadget, |
497 | USB_STATE_NOTATTACHED); | |
2ccea03a FB |
498 | ret = 0; |
499 | break; | |
500 | } | |
501 | ||
502 | mutex_unlock(&udc_lock); | |
503 | return ret; | |
504 | } | |
505 | EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver); | |
506 | ||
507 | /* ------------------------------------------------------------------------- */ | |
508 | ||
509 | static ssize_t usb_udc_srp_store(struct device *dev, | |
510 | struct device_attribute *attr, const char *buf, size_t n) | |
511 | { | |
1d91a962 | 512 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a FB |
513 | |
514 | if (sysfs_streq(buf, "1")) | |
515 | usb_gadget_wakeup(udc->gadget); | |
516 | ||
517 | return n; | |
518 | } | |
519 | static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store); | |
520 | ||
521 | static ssize_t usb_udc_softconn_store(struct device *dev, | |
522 | struct device_attribute *attr, const char *buf, size_t n) | |
523 | { | |
865569ba | 524 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); |
2ccea03a | 525 | |
bfa6b18c FB |
526 | if (!udc->driver) { |
527 | dev_err(dev, "soft-connect without a gadget driver\n"); | |
528 | return -EOPNOTSUPP; | |
529 | } | |
530 | ||
2ccea03a | 531 | if (sysfs_streq(buf, "connect")) { |
2c683347 | 532 | usb_gadget_udc_start(udc); |
2ccea03a FB |
533 | usb_gadget_connect(udc->gadget); |
534 | } else if (sysfs_streq(buf, "disconnect")) { | |
83a787a7 | 535 | usb_gadget_disconnect(udc->gadget); |
0abd0696 | 536 | udc->driver->disconnect(udc->gadget); |
2c683347 | 537 | usb_gadget_udc_stop(udc); |
2ccea03a FB |
538 | } else { |
539 | dev_err(dev, "unsupported command '%s'\n", buf); | |
540 | return -EINVAL; | |
541 | } | |
542 | ||
543 | return n; | |
544 | } | |
545 | static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store); | |
546 | ||
ce26bd23 GKH |
547 | static ssize_t state_show(struct device *dev, struct device_attribute *attr, |
548 | char *buf) | |
49401f41 FB |
549 | { |
550 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
551 | struct usb_gadget *gadget = udc->gadget; | |
552 | ||
553 | return sprintf(buf, "%s\n", usb_state_string(gadget->state)); | |
554 | } | |
ce26bd23 | 555 | static DEVICE_ATTR_RO(state); |
49401f41 | 556 | |
d327ab5b | 557 | #define USB_UDC_SPEED_ATTR(name, param) \ |
ce26bd23 | 558 | ssize_t name##_show(struct device *dev, \ |
d327ab5b MN |
559 | struct device_attribute *attr, char *buf) \ |
560 | { \ | |
561 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ | |
562 | return snprintf(buf, PAGE_SIZE, "%s\n", \ | |
563 | usb_speed_string(udc->gadget->param)); \ | |
564 | } \ | |
ce26bd23 | 565 | static DEVICE_ATTR_RO(name) |
d327ab5b MN |
566 | |
567 | static USB_UDC_SPEED_ATTR(current_speed, speed); | |
568 | static USB_UDC_SPEED_ATTR(maximum_speed, max_speed); | |
569 | ||
2ccea03a | 570 | #define USB_UDC_ATTR(name) \ |
ce26bd23 | 571 | ssize_t name##_show(struct device *dev, \ |
2ccea03a FB |
572 | struct device_attribute *attr, char *buf) \ |
573 | { \ | |
019f976e | 574 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ |
2ccea03a FB |
575 | struct usb_gadget *gadget = udc->gadget; \ |
576 | \ | |
577 | return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \ | |
578 | } \ | |
ce26bd23 | 579 | static DEVICE_ATTR_RO(name) |
2ccea03a | 580 | |
2ccea03a FB |
581 | static USB_UDC_ATTR(is_otg); |
582 | static USB_UDC_ATTR(is_a_peripheral); | |
583 | static USB_UDC_ATTR(b_hnp_enable); | |
584 | static USB_UDC_ATTR(a_hnp_support); | |
585 | static USB_UDC_ATTR(a_alt_hnp_support); | |
3f6dd4fe | 586 | static USB_UDC_ATTR(is_selfpowered); |
2ccea03a FB |
587 | |
588 | static struct attribute *usb_udc_attrs[] = { | |
589 | &dev_attr_srp.attr, | |
590 | &dev_attr_soft_connect.attr, | |
49401f41 | 591 | &dev_attr_state.attr, |
d327ab5b MN |
592 | &dev_attr_current_speed.attr, |
593 | &dev_attr_maximum_speed.attr, | |
2ccea03a | 594 | |
2ccea03a FB |
595 | &dev_attr_is_otg.attr, |
596 | &dev_attr_is_a_peripheral.attr, | |
597 | &dev_attr_b_hnp_enable.attr, | |
598 | &dev_attr_a_hnp_support.attr, | |
599 | &dev_attr_a_alt_hnp_support.attr, | |
3f6dd4fe | 600 | &dev_attr_is_selfpowered.attr, |
2ccea03a FB |
601 | NULL, |
602 | }; | |
603 | ||
604 | static const struct attribute_group usb_udc_attr_group = { | |
605 | .attrs = usb_udc_attrs, | |
606 | }; | |
607 | ||
608 | static const struct attribute_group *usb_udc_attr_groups[] = { | |
609 | &usb_udc_attr_group, | |
610 | NULL, | |
611 | }; | |
612 | ||
613 | static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env) | |
614 | { | |
615 | struct usb_udc *udc = container_of(dev, struct usb_udc, dev); | |
616 | int ret; | |
617 | ||
618 | ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name); | |
619 | if (ret) { | |
620 | dev_err(dev, "failed to add uevent USB_UDC_NAME\n"); | |
621 | return ret; | |
622 | } | |
623 | ||
624 | if (udc->driver) { | |
625 | ret = add_uevent_var(env, "USB_UDC_DRIVER=%s", | |
626 | udc->driver->function); | |
627 | if (ret) { | |
628 | dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n"); | |
629 | return ret; | |
630 | } | |
631 | } | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int __init usb_udc_init(void) | |
637 | { | |
638 | udc_class = class_create(THIS_MODULE, "udc"); | |
639 | if (IS_ERR(udc_class)) { | |
640 | pr_err("failed to create udc class --> %ld\n", | |
641 | PTR_ERR(udc_class)); | |
642 | return PTR_ERR(udc_class); | |
643 | } | |
644 | ||
645 | udc_class->dev_uevent = usb_udc_uevent; | |
2ccea03a FB |
646 | return 0; |
647 | } | |
648 | subsys_initcall(usb_udc_init); | |
649 | ||
650 | static void __exit usb_udc_exit(void) | |
651 | { | |
652 | class_destroy(udc_class); | |
653 | } | |
654 | module_exit(usb_udc_exit); | |
655 | ||
656 | MODULE_DESCRIPTION("UDC Framework"); | |
657 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); | |
658 | MODULE_LICENSE("GPL v2"); |