]>
Commit | Line | Data |
---|---|---|
f2c2e717 AK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * USB Raw Gadget driver. | |
4 | * See Documentation/usb/raw-gadget.rst for more details. | |
5 | * | |
6 | * Andrey Konovalov <andreyknvl@gmail.com> | |
7 | */ | |
8 | ||
9 | #include <linux/compiler.h> | |
97df5e57 | 10 | #include <linux/ctype.h> |
f2c2e717 AK |
11 | #include <linux/debugfs.h> |
12 | #include <linux/delay.h> | |
13 | #include <linux/kref.h> | |
14 | #include <linux/miscdevice.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/semaphore.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/uaccess.h> | |
20 | #include <linux/wait.h> | |
21 | ||
22 | #include <linux/usb.h> | |
23 | #include <linux/usb/ch9.h> | |
24 | #include <linux/usb/ch11.h> | |
25 | #include <linux/usb/gadget.h> | |
26 | ||
27 | #include <uapi/linux/usb/raw_gadget.h> | |
28 | ||
29 | #define DRIVER_DESC "USB Raw Gadget" | |
30 | #define DRIVER_NAME "raw-gadget" | |
31 | ||
32 | MODULE_DESCRIPTION(DRIVER_DESC); | |
33 | MODULE_AUTHOR("Andrey Konovalov"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
36 | /*----------------------------------------------------------------------*/ | |
37 | ||
38 | #define RAW_EVENT_QUEUE_SIZE 16 | |
39 | ||
40 | struct raw_event_queue { | |
41 | /* See the comment in raw_event_queue_fetch() for locking details. */ | |
42 | spinlock_t lock; | |
43 | struct semaphore sema; | |
44 | struct usb_raw_event *events[RAW_EVENT_QUEUE_SIZE]; | |
45 | int size; | |
46 | }; | |
47 | ||
48 | static void raw_event_queue_init(struct raw_event_queue *queue) | |
49 | { | |
50 | spin_lock_init(&queue->lock); | |
51 | sema_init(&queue->sema, 0); | |
52 | queue->size = 0; | |
53 | } | |
54 | ||
55 | static int raw_event_queue_add(struct raw_event_queue *queue, | |
56 | enum usb_raw_event_type type, size_t length, const void *data) | |
57 | { | |
58 | unsigned long flags; | |
59 | struct usb_raw_event *event; | |
60 | ||
61 | spin_lock_irqsave(&queue->lock, flags); | |
62 | if (WARN_ON(queue->size >= RAW_EVENT_QUEUE_SIZE)) { | |
63 | spin_unlock_irqrestore(&queue->lock, flags); | |
64 | return -ENOMEM; | |
65 | } | |
66 | event = kmalloc(sizeof(*event) + length, GFP_ATOMIC); | |
67 | if (!event) { | |
68 | spin_unlock_irqrestore(&queue->lock, flags); | |
69 | return -ENOMEM; | |
70 | } | |
71 | event->type = type; | |
72 | event->length = length; | |
73 | if (event->length) | |
74 | memcpy(&event->data[0], data, length); | |
75 | queue->events[queue->size] = event; | |
76 | queue->size++; | |
77 | up(&queue->sema); | |
78 | spin_unlock_irqrestore(&queue->lock, flags); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static struct usb_raw_event *raw_event_queue_fetch( | |
83 | struct raw_event_queue *queue) | |
84 | { | |
fdd10499 | 85 | int ret; |
f2c2e717 AK |
86 | unsigned long flags; |
87 | struct usb_raw_event *event; | |
88 | ||
89 | /* | |
90 | * This function can be called concurrently. We first check that | |
91 | * there's at least one event queued by decrementing the semaphore, | |
92 | * and then take the lock to protect queue struct fields. | |
93 | */ | |
fdd10499 AK |
94 | ret = down_interruptible(&queue->sema); |
95 | if (ret) | |
96 | return ERR_PTR(ret); | |
f2c2e717 | 97 | spin_lock_irqsave(&queue->lock, flags); |
fdd10499 AK |
98 | /* |
99 | * queue->size must have the same value as queue->sema counter (before | |
100 | * the down_interruptible() call above), so this check is a fail-safe. | |
101 | */ | |
102 | if (WARN_ON(!queue->size)) { | |
103 | spin_unlock_irqrestore(&queue->lock, flags); | |
104 | return ERR_PTR(-ENODEV); | |
105 | } | |
f2c2e717 AK |
106 | event = queue->events[0]; |
107 | queue->size--; | |
108 | memmove(&queue->events[0], &queue->events[1], | |
109 | queue->size * sizeof(queue->events[0])); | |
110 | spin_unlock_irqrestore(&queue->lock, flags); | |
111 | return event; | |
112 | } | |
113 | ||
114 | static void raw_event_queue_destroy(struct raw_event_queue *queue) | |
115 | { | |
116 | int i; | |
117 | ||
118 | for (i = 0; i < queue->size; i++) | |
119 | kfree(queue->events[i]); | |
120 | queue->size = 0; | |
121 | } | |
122 | ||
123 | /*----------------------------------------------------------------------*/ | |
124 | ||
125 | struct raw_dev; | |
126 | ||
f2c2e717 AK |
127 | enum ep_state { |
128 | STATE_EP_DISABLED, | |
129 | STATE_EP_ENABLED, | |
130 | }; | |
131 | ||
132 | struct raw_ep { | |
133 | struct raw_dev *dev; | |
134 | enum ep_state state; | |
135 | struct usb_ep *ep; | |
97df5e57 | 136 | u8 addr; |
f2c2e717 AK |
137 | struct usb_request *req; |
138 | bool urb_queued; | |
139 | bool disabling; | |
140 | ssize_t status; | |
141 | }; | |
142 | ||
143 | enum dev_state { | |
144 | STATE_DEV_INVALID = 0, | |
145 | STATE_DEV_OPENED, | |
146 | STATE_DEV_INITIALIZED, | |
147 | STATE_DEV_RUNNING, | |
148 | STATE_DEV_CLOSED, | |
149 | STATE_DEV_FAILED | |
150 | }; | |
151 | ||
152 | struct raw_dev { | |
153 | struct kref count; | |
154 | spinlock_t lock; | |
155 | ||
156 | const char *udc_name; | |
157 | struct usb_gadget_driver driver; | |
158 | ||
159 | /* Reference to misc device: */ | |
160 | struct device *dev; | |
161 | ||
162 | /* Protected by lock: */ | |
163 | enum dev_state state; | |
164 | bool gadget_registered; | |
165 | struct usb_gadget *gadget; | |
166 | struct usb_request *req; | |
167 | bool ep0_in_pending; | |
168 | bool ep0_out_pending; | |
169 | bool ep0_urb_queued; | |
170 | ssize_t ep0_status; | |
97df5e57 AK |
171 | struct raw_ep eps[USB_RAW_EPS_NUM_MAX]; |
172 | int eps_num; | |
f2c2e717 AK |
173 | |
174 | struct completion ep0_done; | |
175 | struct raw_event_queue queue; | |
176 | }; | |
177 | ||
178 | static struct raw_dev *dev_new(void) | |
179 | { | |
180 | struct raw_dev *dev; | |
181 | ||
182 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
183 | if (!dev) | |
184 | return NULL; | |
185 | /* Matches kref_put() in raw_release(). */ | |
186 | kref_init(&dev->count); | |
187 | spin_lock_init(&dev->lock); | |
188 | init_completion(&dev->ep0_done); | |
189 | raw_event_queue_init(&dev->queue); | |
190 | return dev; | |
191 | } | |
192 | ||
193 | static void dev_free(struct kref *kref) | |
194 | { | |
195 | struct raw_dev *dev = container_of(kref, struct raw_dev, count); | |
196 | int i; | |
197 | ||
198 | kfree(dev->udc_name); | |
199 | kfree(dev->driver.udc_name); | |
200 | if (dev->req) { | |
201 | if (dev->ep0_urb_queued) | |
202 | usb_ep_dequeue(dev->gadget->ep0, dev->req); | |
203 | usb_ep_free_request(dev->gadget->ep0, dev->req); | |
204 | } | |
205 | raw_event_queue_destroy(&dev->queue); | |
97df5e57 | 206 | for (i = 0; i < dev->eps_num; i++) { |
c61769bd | 207 | if (dev->eps[i].state == STATE_EP_DISABLED) |
f2c2e717 AK |
208 | continue; |
209 | usb_ep_disable(dev->eps[i].ep); | |
210 | usb_ep_free_request(dev->eps[i].ep, dev->eps[i].req); | |
211 | kfree(dev->eps[i].ep->desc); | |
212 | dev->eps[i].state = STATE_EP_DISABLED; | |
213 | } | |
214 | kfree(dev); | |
215 | } | |
216 | ||
217 | /*----------------------------------------------------------------------*/ | |
218 | ||
219 | static int raw_queue_event(struct raw_dev *dev, | |
220 | enum usb_raw_event_type type, size_t length, const void *data) | |
221 | { | |
222 | int ret = 0; | |
223 | unsigned long flags; | |
224 | ||
225 | ret = raw_event_queue_add(&dev->queue, type, length, data); | |
226 | if (ret < 0) { | |
227 | spin_lock_irqsave(&dev->lock, flags); | |
228 | dev->state = STATE_DEV_FAILED; | |
229 | spin_unlock_irqrestore(&dev->lock, flags); | |
230 | } | |
231 | return ret; | |
232 | } | |
233 | ||
234 | static void gadget_ep0_complete(struct usb_ep *ep, struct usb_request *req) | |
235 | { | |
236 | struct raw_dev *dev = req->context; | |
237 | unsigned long flags; | |
238 | ||
239 | spin_lock_irqsave(&dev->lock, flags); | |
240 | if (req->status) | |
241 | dev->ep0_status = req->status; | |
242 | else | |
243 | dev->ep0_status = req->actual; | |
244 | if (dev->ep0_in_pending) | |
245 | dev->ep0_in_pending = false; | |
246 | else | |
247 | dev->ep0_out_pending = false; | |
248 | spin_unlock_irqrestore(&dev->lock, flags); | |
249 | ||
250 | complete(&dev->ep0_done); | |
251 | } | |
252 | ||
97df5e57 AK |
253 | static u8 get_ep_addr(const char *name) |
254 | { | |
255 | /* If the endpoint has fixed function (named as e.g. "ep12out-bulk"), | |
256 | * parse the endpoint address from its name. We deliberately use | |
257 | * deprecated simple_strtoul() function here, as the number isn't | |
258 | * followed by '\0' nor '\n'. | |
259 | */ | |
260 | if (isdigit(name[2])) | |
261 | return simple_strtoul(&name[2], NULL, 10); | |
262 | /* Otherwise the endpoint is configurable (named as e.g. "ep-a"). */ | |
263 | return USB_RAW_EP_ADDR_ANY; | |
264 | } | |
265 | ||
f2c2e717 AK |
266 | static int gadget_bind(struct usb_gadget *gadget, |
267 | struct usb_gadget_driver *driver) | |
268 | { | |
97df5e57 | 269 | int ret = 0, i = 0; |
f2c2e717 AK |
270 | struct raw_dev *dev = container_of(driver, struct raw_dev, driver); |
271 | struct usb_request *req; | |
97df5e57 | 272 | struct usb_ep *ep; |
f2c2e717 AK |
273 | unsigned long flags; |
274 | ||
275 | if (strcmp(gadget->name, dev->udc_name) != 0) | |
276 | return -ENODEV; | |
277 | ||
278 | set_gadget_data(gadget, dev); | |
279 | req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
280 | if (!req) { | |
281 | dev_err(&gadget->dev, "usb_ep_alloc_request failed\n"); | |
282 | set_gadget_data(gadget, NULL); | |
283 | return -ENOMEM; | |
284 | } | |
285 | ||
286 | spin_lock_irqsave(&dev->lock, flags); | |
287 | dev->req = req; | |
288 | dev->req->context = dev; | |
289 | dev->req->complete = gadget_ep0_complete; | |
290 | dev->gadget = gadget; | |
97df5e57 AK |
291 | gadget_for_each_ep(ep, dev->gadget) { |
292 | dev->eps[i].ep = ep; | |
293 | dev->eps[i].addr = get_ep_addr(ep->name); | |
294 | dev->eps[i].state = STATE_EP_DISABLED; | |
295 | i++; | |
296 | } | |
297 | dev->eps_num = i; | |
f2c2e717 AK |
298 | spin_unlock_irqrestore(&dev->lock, flags); |
299 | ||
300 | /* Matches kref_put() in gadget_unbind(). */ | |
301 | kref_get(&dev->count); | |
302 | ||
303 | ret = raw_queue_event(dev, USB_RAW_EVENT_CONNECT, 0, NULL); | |
304 | if (ret < 0) | |
305 | dev_err(&gadget->dev, "failed to queue event\n"); | |
306 | ||
307 | return ret; | |
308 | } | |
309 | ||
310 | static void gadget_unbind(struct usb_gadget *gadget) | |
311 | { | |
312 | struct raw_dev *dev = get_gadget_data(gadget); | |
313 | ||
314 | set_gadget_data(gadget, NULL); | |
315 | /* Matches kref_get() in gadget_bind(). */ | |
316 | kref_put(&dev->count, dev_free); | |
317 | } | |
318 | ||
319 | static int gadget_setup(struct usb_gadget *gadget, | |
320 | const struct usb_ctrlrequest *ctrl) | |
321 | { | |
322 | int ret = 0; | |
323 | struct raw_dev *dev = get_gadget_data(gadget); | |
324 | unsigned long flags; | |
325 | ||
326 | spin_lock_irqsave(&dev->lock, flags); | |
327 | if (dev->state != STATE_DEV_RUNNING) { | |
328 | dev_err(&gadget->dev, "ignoring, device is not running\n"); | |
329 | ret = -ENODEV; | |
330 | goto out_unlock; | |
331 | } | |
332 | if (dev->ep0_in_pending || dev->ep0_out_pending) { | |
333 | dev_dbg(&gadget->dev, "stalling, request already pending\n"); | |
334 | ret = -EBUSY; | |
335 | goto out_unlock; | |
336 | } | |
337 | if ((ctrl->bRequestType & USB_DIR_IN) && ctrl->wLength) | |
338 | dev->ep0_in_pending = true; | |
339 | else | |
340 | dev->ep0_out_pending = true; | |
341 | spin_unlock_irqrestore(&dev->lock, flags); | |
342 | ||
343 | ret = raw_queue_event(dev, USB_RAW_EVENT_CONTROL, sizeof(*ctrl), ctrl); | |
344 | if (ret < 0) | |
345 | dev_err(&gadget->dev, "failed to queue event\n"); | |
346 | goto out; | |
347 | ||
348 | out_unlock: | |
349 | spin_unlock_irqrestore(&dev->lock, flags); | |
350 | out: | |
351 | return ret; | |
352 | } | |
353 | ||
354 | /* These are currently unused but present in case UDC driver requires them. */ | |
355 | static void gadget_disconnect(struct usb_gadget *gadget) { } | |
356 | static void gadget_suspend(struct usb_gadget *gadget) { } | |
357 | static void gadget_resume(struct usb_gadget *gadget) { } | |
358 | static void gadget_reset(struct usb_gadget *gadget) { } | |
359 | ||
360 | /*----------------------------------------------------------------------*/ | |
361 | ||
362 | static struct miscdevice raw_misc_device; | |
363 | ||
364 | static int raw_open(struct inode *inode, struct file *fd) | |
365 | { | |
366 | struct raw_dev *dev; | |
367 | ||
368 | /* Nonblocking I/O is not supported yet. */ | |
369 | if (fd->f_flags & O_NONBLOCK) | |
370 | return -EINVAL; | |
371 | ||
372 | dev = dev_new(); | |
373 | if (!dev) | |
374 | return -ENOMEM; | |
375 | fd->private_data = dev; | |
376 | dev->state = STATE_DEV_OPENED; | |
377 | dev->dev = raw_misc_device.this_device; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | static int raw_release(struct inode *inode, struct file *fd) | |
382 | { | |
383 | int ret = 0; | |
384 | struct raw_dev *dev = fd->private_data; | |
385 | unsigned long flags; | |
386 | bool unregister = false; | |
387 | ||
388 | spin_lock_irqsave(&dev->lock, flags); | |
389 | dev->state = STATE_DEV_CLOSED; | |
390 | if (!dev->gadget) { | |
391 | spin_unlock_irqrestore(&dev->lock, flags); | |
392 | goto out_put; | |
393 | } | |
394 | if (dev->gadget_registered) | |
395 | unregister = true; | |
396 | dev->gadget_registered = false; | |
397 | spin_unlock_irqrestore(&dev->lock, flags); | |
398 | ||
399 | if (unregister) { | |
400 | ret = usb_gadget_unregister_driver(&dev->driver); | |
401 | if (ret != 0) | |
402 | dev_err(dev->dev, | |
403 | "usb_gadget_unregister_driver() failed with %d\n", | |
404 | ret); | |
405 | /* Matches kref_get() in raw_ioctl_run(). */ | |
406 | kref_put(&dev->count, dev_free); | |
407 | } | |
408 | ||
409 | out_put: | |
410 | /* Matches dev_new() in raw_open(). */ | |
411 | kref_put(&dev->count, dev_free); | |
412 | return ret; | |
413 | } | |
414 | ||
415 | /*----------------------------------------------------------------------*/ | |
416 | ||
417 | static int raw_ioctl_init(struct raw_dev *dev, unsigned long value) | |
418 | { | |
419 | int ret = 0; | |
420 | struct usb_raw_init arg; | |
421 | char *udc_driver_name; | |
422 | char *udc_device_name; | |
423 | unsigned long flags; | |
424 | ||
068fbff4 DC |
425 | if (copy_from_user(&arg, (void __user *)value, sizeof(arg))) |
426 | return -EFAULT; | |
f2c2e717 AK |
427 | |
428 | switch (arg.speed) { | |
429 | case USB_SPEED_UNKNOWN: | |
430 | arg.speed = USB_SPEED_HIGH; | |
431 | break; | |
432 | case USB_SPEED_LOW: | |
433 | case USB_SPEED_FULL: | |
434 | case USB_SPEED_HIGH: | |
435 | case USB_SPEED_SUPER: | |
436 | break; | |
437 | default: | |
438 | return -EINVAL; | |
439 | } | |
440 | ||
441 | udc_driver_name = kmalloc(UDC_NAME_LENGTH_MAX, GFP_KERNEL); | |
442 | if (!udc_driver_name) | |
443 | return -ENOMEM; | |
444 | ret = strscpy(udc_driver_name, &arg.driver_name[0], | |
445 | UDC_NAME_LENGTH_MAX); | |
446 | if (ret < 0) { | |
447 | kfree(udc_driver_name); | |
448 | return ret; | |
449 | } | |
450 | ret = 0; | |
451 | ||
452 | udc_device_name = kmalloc(UDC_NAME_LENGTH_MAX, GFP_KERNEL); | |
453 | if (!udc_device_name) { | |
454 | kfree(udc_driver_name); | |
455 | return -ENOMEM; | |
456 | } | |
457 | ret = strscpy(udc_device_name, &arg.device_name[0], | |
458 | UDC_NAME_LENGTH_MAX); | |
459 | if (ret < 0) { | |
460 | kfree(udc_driver_name); | |
461 | kfree(udc_device_name); | |
462 | return ret; | |
463 | } | |
464 | ret = 0; | |
465 | ||
466 | spin_lock_irqsave(&dev->lock, flags); | |
467 | if (dev->state != STATE_DEV_OPENED) { | |
468 | dev_dbg(dev->dev, "fail, device is not opened\n"); | |
469 | kfree(udc_driver_name); | |
470 | kfree(udc_device_name); | |
471 | ret = -EINVAL; | |
472 | goto out_unlock; | |
473 | } | |
474 | dev->udc_name = udc_driver_name; | |
475 | ||
476 | dev->driver.function = DRIVER_DESC; | |
477 | dev->driver.max_speed = arg.speed; | |
478 | dev->driver.setup = gadget_setup; | |
479 | dev->driver.disconnect = gadget_disconnect; | |
480 | dev->driver.bind = gadget_bind; | |
481 | dev->driver.unbind = gadget_unbind; | |
482 | dev->driver.suspend = gadget_suspend; | |
483 | dev->driver.resume = gadget_resume; | |
484 | dev->driver.reset = gadget_reset; | |
485 | dev->driver.driver.name = DRIVER_NAME; | |
486 | dev->driver.udc_name = udc_device_name; | |
487 | dev->driver.match_existing_only = 1; | |
488 | ||
489 | dev->state = STATE_DEV_INITIALIZED; | |
490 | ||
491 | out_unlock: | |
492 | spin_unlock_irqrestore(&dev->lock, flags); | |
493 | return ret; | |
494 | } | |
495 | ||
496 | static int raw_ioctl_run(struct raw_dev *dev, unsigned long value) | |
497 | { | |
498 | int ret = 0; | |
499 | unsigned long flags; | |
500 | ||
501 | if (value) | |
502 | return -EINVAL; | |
503 | ||
504 | spin_lock_irqsave(&dev->lock, flags); | |
505 | if (dev->state != STATE_DEV_INITIALIZED) { | |
506 | dev_dbg(dev->dev, "fail, device is not initialized\n"); | |
507 | ret = -EINVAL; | |
508 | goto out_unlock; | |
509 | } | |
510 | spin_unlock_irqrestore(&dev->lock, flags); | |
511 | ||
512 | ret = usb_gadget_probe_driver(&dev->driver); | |
513 | ||
514 | spin_lock_irqsave(&dev->lock, flags); | |
515 | if (ret) { | |
516 | dev_err(dev->dev, | |
517 | "fail, usb_gadget_probe_driver returned %d\n", ret); | |
518 | dev->state = STATE_DEV_FAILED; | |
519 | goto out_unlock; | |
520 | } | |
521 | dev->gadget_registered = true; | |
522 | dev->state = STATE_DEV_RUNNING; | |
523 | /* Matches kref_put() in raw_release(). */ | |
524 | kref_get(&dev->count); | |
525 | ||
526 | out_unlock: | |
527 | spin_unlock_irqrestore(&dev->lock, flags); | |
528 | return ret; | |
529 | } | |
530 | ||
531 | static int raw_ioctl_event_fetch(struct raw_dev *dev, unsigned long value) | |
532 | { | |
f2c2e717 AK |
533 | struct usb_raw_event arg; |
534 | unsigned long flags; | |
535 | struct usb_raw_event *event; | |
536 | uint32_t length; | |
537 | ||
068fbff4 DC |
538 | if (copy_from_user(&arg, (void __user *)value, sizeof(arg))) |
539 | return -EFAULT; | |
f2c2e717 AK |
540 | |
541 | spin_lock_irqsave(&dev->lock, flags); | |
542 | if (dev->state != STATE_DEV_RUNNING) { | |
543 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
544 | spin_unlock_irqrestore(&dev->lock, flags); | |
545 | return -EINVAL; | |
546 | } | |
547 | if (!dev->gadget) { | |
548 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
549 | spin_unlock_irqrestore(&dev->lock, flags); | |
550 | return -EBUSY; | |
551 | } | |
552 | spin_unlock_irqrestore(&dev->lock, flags); | |
553 | ||
554 | event = raw_event_queue_fetch(&dev->queue); | |
fdd10499 | 555 | if (PTR_ERR(event) == -EINTR) { |
f2c2e717 AK |
556 | dev_dbg(&dev->gadget->dev, "event fetching interrupted\n"); |
557 | return -EINTR; | |
558 | } | |
fdd10499 AK |
559 | if (IS_ERR(event)) { |
560 | dev_err(&dev->gadget->dev, "failed to fetch event\n"); | |
561 | spin_lock_irqsave(&dev->lock, flags); | |
562 | dev->state = STATE_DEV_FAILED; | |
563 | spin_unlock_irqrestore(&dev->lock, flags); | |
564 | return -ENODEV; | |
565 | } | |
f2c2e717 | 566 | length = min(arg.length, event->length); |
068fbff4 DC |
567 | if (copy_to_user((void __user *)value, event, sizeof(*event) + length)) |
568 | return -EFAULT; | |
569 | ||
570 | return 0; | |
f2c2e717 AK |
571 | } |
572 | ||
573 | static void *raw_alloc_io_data(struct usb_raw_ep_io *io, void __user *ptr, | |
574 | bool get_from_user) | |
575 | { | |
f2c2e717 AK |
576 | void *data; |
577 | ||
068fbff4 DC |
578 | if (copy_from_user(io, ptr, sizeof(*io))) |
579 | return ERR_PTR(-EFAULT); | |
97df5e57 | 580 | if (io->ep >= USB_RAW_EPS_NUM_MAX) |
f2c2e717 AK |
581 | return ERR_PTR(-EINVAL); |
582 | if (!usb_raw_io_flags_valid(io->flags)) | |
583 | return ERR_PTR(-EINVAL); | |
584 | if (io->length > PAGE_SIZE) | |
585 | return ERR_PTR(-EINVAL); | |
586 | if (get_from_user) | |
587 | data = memdup_user(ptr + sizeof(*io), io->length); | |
588 | else { | |
589 | data = kmalloc(io->length, GFP_KERNEL); | |
590 | if (!data) | |
591 | data = ERR_PTR(-ENOMEM); | |
592 | } | |
593 | return data; | |
594 | } | |
595 | ||
596 | static int raw_process_ep0_io(struct raw_dev *dev, struct usb_raw_ep_io *io, | |
597 | void *data, bool in) | |
598 | { | |
599 | int ret = 0; | |
600 | unsigned long flags; | |
601 | ||
602 | spin_lock_irqsave(&dev->lock, flags); | |
603 | if (dev->state != STATE_DEV_RUNNING) { | |
604 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
605 | ret = -EINVAL; | |
606 | goto out_unlock; | |
607 | } | |
608 | if (!dev->gadget) { | |
609 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
610 | ret = -EBUSY; | |
611 | goto out_unlock; | |
612 | } | |
613 | if (dev->ep0_urb_queued) { | |
614 | dev_dbg(&dev->gadget->dev, "fail, urb already queued\n"); | |
615 | ret = -EBUSY; | |
616 | goto out_unlock; | |
617 | } | |
618 | if ((in && !dev->ep0_in_pending) || | |
619 | (!in && !dev->ep0_out_pending)) { | |
620 | dev_dbg(&dev->gadget->dev, "fail, wrong direction\n"); | |
621 | ret = -EBUSY; | |
622 | goto out_unlock; | |
623 | } | |
624 | if (WARN_ON(in && dev->ep0_out_pending)) { | |
625 | ret = -ENODEV; | |
626 | dev->state = STATE_DEV_FAILED; | |
627 | goto out_done; | |
628 | } | |
629 | if (WARN_ON(!in && dev->ep0_in_pending)) { | |
630 | ret = -ENODEV; | |
631 | dev->state = STATE_DEV_FAILED; | |
632 | goto out_done; | |
633 | } | |
634 | ||
635 | dev->req->buf = data; | |
636 | dev->req->length = io->length; | |
637 | dev->req->zero = usb_raw_io_flags_zero(io->flags); | |
638 | dev->ep0_urb_queued = true; | |
639 | spin_unlock_irqrestore(&dev->lock, flags); | |
640 | ||
641 | ret = usb_ep_queue(dev->gadget->ep0, dev->req, GFP_KERNEL); | |
642 | if (ret) { | |
643 | dev_err(&dev->gadget->dev, | |
644 | "fail, usb_ep_queue returned %d\n", ret); | |
645 | spin_lock_irqsave(&dev->lock, flags); | |
646 | dev->state = STATE_DEV_FAILED; | |
647 | goto out_done; | |
648 | } | |
649 | ||
650 | ret = wait_for_completion_interruptible(&dev->ep0_done); | |
651 | if (ret) { | |
652 | dev_dbg(&dev->gadget->dev, "wait interrupted\n"); | |
653 | usb_ep_dequeue(dev->gadget->ep0, dev->req); | |
654 | wait_for_completion(&dev->ep0_done); | |
655 | spin_lock_irqsave(&dev->lock, flags); | |
656 | goto out_done; | |
657 | } | |
658 | ||
659 | spin_lock_irqsave(&dev->lock, flags); | |
660 | ret = dev->ep0_status; | |
661 | ||
662 | out_done: | |
663 | dev->ep0_urb_queued = false; | |
664 | out_unlock: | |
665 | spin_unlock_irqrestore(&dev->lock, flags); | |
666 | return ret; | |
667 | } | |
668 | ||
669 | static int raw_ioctl_ep0_write(struct raw_dev *dev, unsigned long value) | |
670 | { | |
671 | int ret = 0; | |
672 | void *data; | |
673 | struct usb_raw_ep_io io; | |
674 | ||
675 | data = raw_alloc_io_data(&io, (void __user *)value, true); | |
676 | if (IS_ERR(data)) | |
677 | return PTR_ERR(data); | |
678 | ret = raw_process_ep0_io(dev, &io, data, true); | |
679 | kfree(data); | |
680 | return ret; | |
681 | } | |
682 | ||
683 | static int raw_ioctl_ep0_read(struct raw_dev *dev, unsigned long value) | |
684 | { | |
685 | int ret = 0; | |
686 | void *data; | |
687 | struct usb_raw_ep_io io; | |
688 | unsigned int length; | |
689 | ||
690 | data = raw_alloc_io_data(&io, (void __user *)value, false); | |
691 | if (IS_ERR(data)) | |
692 | return PTR_ERR(data); | |
693 | ret = raw_process_ep0_io(dev, &io, data, false); | |
6e507644 | 694 | if (ret < 0) |
068fbff4 DC |
695 | goto free; |
696 | ||
f2c2e717 | 697 | length = min(io.length, (unsigned int)ret); |
068fbff4 DC |
698 | if (copy_to_user((void __user *)(value + sizeof(io)), data, length)) |
699 | ret = -EFAULT; | |
6e507644 AK |
700 | else |
701 | ret = length; | |
068fbff4 | 702 | free: |
f2c2e717 AK |
703 | kfree(data); |
704 | return ret; | |
705 | } | |
706 | ||
c61769bd AK |
707 | static int raw_ioctl_ep0_stall(struct raw_dev *dev, unsigned long value) |
708 | { | |
709 | int ret = 0; | |
710 | unsigned long flags; | |
711 | ||
712 | if (value) | |
713 | return -EINVAL; | |
714 | spin_lock_irqsave(&dev->lock, flags); | |
715 | if (dev->state != STATE_DEV_RUNNING) { | |
716 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
717 | ret = -EINVAL; | |
718 | goto out_unlock; | |
719 | } | |
720 | if (!dev->gadget) { | |
721 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
722 | ret = -EBUSY; | |
723 | goto out_unlock; | |
724 | } | |
725 | if (dev->ep0_urb_queued) { | |
726 | dev_dbg(&dev->gadget->dev, "fail, urb already queued\n"); | |
727 | ret = -EBUSY; | |
728 | goto out_unlock; | |
729 | } | |
730 | if (!dev->ep0_in_pending && !dev->ep0_out_pending) { | |
731 | dev_dbg(&dev->gadget->dev, "fail, no request pending\n"); | |
732 | ret = -EBUSY; | |
733 | goto out_unlock; | |
734 | } | |
735 | ||
736 | ret = usb_ep_set_halt(dev->gadget->ep0); | |
737 | if (ret < 0) | |
738 | dev_err(&dev->gadget->dev, | |
739 | "fail, usb_ep_set_halt returned %d\n", ret); | |
740 | ||
741 | if (dev->ep0_in_pending) | |
742 | dev->ep0_in_pending = false; | |
743 | else | |
744 | dev->ep0_out_pending = false; | |
745 | ||
746 | out_unlock: | |
747 | spin_unlock_irqrestore(&dev->lock, flags); | |
748 | return ret; | |
749 | } | |
750 | ||
f2c2e717 AK |
751 | static int raw_ioctl_ep_enable(struct raw_dev *dev, unsigned long value) |
752 | { | |
753 | int ret = 0, i; | |
754 | unsigned long flags; | |
755 | struct usb_endpoint_descriptor *desc; | |
97df5e57 | 756 | struct raw_ep *ep; |
f2c2e717 AK |
757 | |
758 | desc = memdup_user((void __user *)value, sizeof(*desc)); | |
759 | if (IS_ERR(desc)) | |
760 | return PTR_ERR(desc); | |
761 | ||
762 | /* | |
763 | * Endpoints with a maxpacket length of 0 can cause crashes in UDC | |
764 | * drivers. | |
765 | */ | |
766 | if (usb_endpoint_maxp(desc) == 0) { | |
767 | dev_dbg(dev->dev, "fail, bad endpoint maxpacket\n"); | |
768 | kfree(desc); | |
769 | return -EINVAL; | |
770 | } | |
771 | ||
772 | spin_lock_irqsave(&dev->lock, flags); | |
773 | if (dev->state != STATE_DEV_RUNNING) { | |
774 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
775 | ret = -EINVAL; | |
776 | goto out_free; | |
777 | } | |
778 | if (!dev->gadget) { | |
779 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
780 | ret = -EBUSY; | |
781 | goto out_free; | |
782 | } | |
783 | ||
97df5e57 AK |
784 | for (i = 0; i < dev->eps_num; i++) { |
785 | ep = &dev->eps[i]; | |
786 | if (ep->state != STATE_EP_DISABLED) | |
f2c2e717 | 787 | continue; |
97df5e57 AK |
788 | if (ep->addr != usb_endpoint_num(desc) && |
789 | ep->addr != USB_RAW_EP_ADDR_ANY) | |
f2c2e717 | 790 | continue; |
97df5e57 | 791 | if (!usb_gadget_ep_match_desc(dev->gadget, ep->ep, desc, NULL)) |
f2c2e717 | 792 | continue; |
97df5e57 AK |
793 | ep->ep->desc = desc; |
794 | ret = usb_ep_enable(ep->ep); | |
f2c2e717 AK |
795 | if (ret < 0) { |
796 | dev_err(&dev->gadget->dev, | |
797 | "fail, usb_ep_enable returned %d\n", ret); | |
798 | goto out_free; | |
799 | } | |
97df5e57 AK |
800 | ep->req = usb_ep_alloc_request(ep->ep, GFP_ATOMIC); |
801 | if (!ep->req) { | |
f2c2e717 AK |
802 | dev_err(&dev->gadget->dev, |
803 | "fail, usb_ep_alloc_request failed\n"); | |
97df5e57 | 804 | usb_ep_disable(ep->ep); |
f2c2e717 AK |
805 | ret = -ENOMEM; |
806 | goto out_free; | |
807 | } | |
97df5e57 AK |
808 | ep->state = STATE_EP_ENABLED; |
809 | ep->ep->driver_data = ep; | |
f2c2e717 AK |
810 | ret = i; |
811 | goto out_unlock; | |
812 | } | |
813 | ||
814 | dev_dbg(&dev->gadget->dev, "fail, no gadget endpoints available\n"); | |
815 | ret = -EBUSY; | |
816 | ||
817 | out_free: | |
818 | kfree(desc); | |
819 | out_unlock: | |
820 | spin_unlock_irqrestore(&dev->lock, flags); | |
821 | return ret; | |
822 | } | |
823 | ||
824 | static int raw_ioctl_ep_disable(struct raw_dev *dev, unsigned long value) | |
825 | { | |
826 | int ret = 0, i = value; | |
827 | unsigned long flags; | |
f2c2e717 AK |
828 | |
829 | spin_lock_irqsave(&dev->lock, flags); | |
830 | if (dev->state != STATE_DEV_RUNNING) { | |
831 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
832 | ret = -EINVAL; | |
833 | goto out_unlock; | |
834 | } | |
835 | if (!dev->gadget) { | |
836 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
837 | ret = -EBUSY; | |
838 | goto out_unlock; | |
839 | } | |
97df5e57 AK |
840 | if (i < 0 || i >= dev->eps_num) { |
841 | dev_dbg(dev->dev, "fail, invalid endpoint\n"); | |
842 | ret = -EBUSY; | |
843 | goto out_unlock; | |
844 | } | |
c61769bd | 845 | if (dev->eps[i].state == STATE_EP_DISABLED) { |
f2c2e717 AK |
846 | dev_dbg(&dev->gadget->dev, "fail, endpoint is not enabled\n"); |
847 | ret = -EINVAL; | |
848 | goto out_unlock; | |
849 | } | |
850 | if (dev->eps[i].disabling) { | |
851 | dev_dbg(&dev->gadget->dev, | |
852 | "fail, disable already in progress\n"); | |
853 | ret = -EINVAL; | |
854 | goto out_unlock; | |
855 | } | |
856 | if (dev->eps[i].urb_queued) { | |
857 | dev_dbg(&dev->gadget->dev, | |
858 | "fail, waiting for urb completion\n"); | |
859 | ret = -EINVAL; | |
860 | goto out_unlock; | |
861 | } | |
862 | dev->eps[i].disabling = true; | |
863 | spin_unlock_irqrestore(&dev->lock, flags); | |
864 | ||
865 | usb_ep_disable(dev->eps[i].ep); | |
866 | ||
867 | spin_lock_irqsave(&dev->lock, flags); | |
868 | usb_ep_free_request(dev->eps[i].ep, dev->eps[i].req); | |
97df5e57 | 869 | kfree(dev->eps[i].ep->desc); |
f2c2e717 | 870 | dev->eps[i].state = STATE_EP_DISABLED; |
f2c2e717 AK |
871 | dev->eps[i].disabling = false; |
872 | ||
873 | out_unlock: | |
874 | spin_unlock_irqrestore(&dev->lock, flags); | |
875 | return ret; | |
876 | } | |
877 | ||
c61769bd AK |
878 | static int raw_ioctl_ep_set_clear_halt_wedge(struct raw_dev *dev, |
879 | unsigned long value, bool set, bool halt) | |
880 | { | |
881 | int ret = 0, i = value; | |
882 | unsigned long flags; | |
883 | ||
884 | spin_lock_irqsave(&dev->lock, flags); | |
885 | if (dev->state != STATE_DEV_RUNNING) { | |
886 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
887 | ret = -EINVAL; | |
888 | goto out_unlock; | |
889 | } | |
890 | if (!dev->gadget) { | |
891 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
892 | ret = -EBUSY; | |
893 | goto out_unlock; | |
894 | } | |
895 | if (i < 0 || i >= dev->eps_num) { | |
896 | dev_dbg(dev->dev, "fail, invalid endpoint\n"); | |
897 | ret = -EBUSY; | |
898 | goto out_unlock; | |
899 | } | |
900 | if (dev->eps[i].state == STATE_EP_DISABLED) { | |
901 | dev_dbg(&dev->gadget->dev, "fail, endpoint is not enabled\n"); | |
902 | ret = -EINVAL; | |
903 | goto out_unlock; | |
904 | } | |
905 | if (dev->eps[i].disabling) { | |
906 | dev_dbg(&dev->gadget->dev, | |
907 | "fail, disable is in progress\n"); | |
908 | ret = -EINVAL; | |
909 | goto out_unlock; | |
910 | } | |
911 | if (dev->eps[i].urb_queued) { | |
912 | dev_dbg(&dev->gadget->dev, | |
913 | "fail, waiting for urb completion\n"); | |
914 | ret = -EINVAL; | |
915 | goto out_unlock; | |
916 | } | |
917 | if (usb_endpoint_xfer_isoc(dev->eps[i].ep->desc)) { | |
918 | dev_dbg(&dev->gadget->dev, | |
919 | "fail, can't halt/wedge ISO endpoint\n"); | |
920 | ret = -EINVAL; | |
921 | goto out_unlock; | |
922 | } | |
923 | ||
924 | if (set && halt) { | |
925 | ret = usb_ep_set_halt(dev->eps[i].ep); | |
926 | if (ret < 0) | |
927 | dev_err(&dev->gadget->dev, | |
928 | "fail, usb_ep_set_halt returned %d\n", ret); | |
929 | } else if (!set && halt) { | |
930 | ret = usb_ep_clear_halt(dev->eps[i].ep); | |
931 | if (ret < 0) | |
932 | dev_err(&dev->gadget->dev, | |
933 | "fail, usb_ep_clear_halt returned %d\n", ret); | |
934 | } else if (set && !halt) { | |
935 | ret = usb_ep_set_wedge(dev->eps[i].ep); | |
936 | if (ret < 0) | |
937 | dev_err(&dev->gadget->dev, | |
938 | "fail, usb_ep_set_wedge returned %d\n", ret); | |
939 | } | |
940 | ||
941 | out_unlock: | |
942 | spin_unlock_irqrestore(&dev->lock, flags); | |
943 | return ret; | |
944 | } | |
945 | ||
f2c2e717 AK |
946 | static void gadget_ep_complete(struct usb_ep *ep, struct usb_request *req) |
947 | { | |
948 | struct raw_ep *r_ep = (struct raw_ep *)ep->driver_data; | |
949 | struct raw_dev *dev = r_ep->dev; | |
950 | unsigned long flags; | |
951 | ||
952 | spin_lock_irqsave(&dev->lock, flags); | |
953 | if (req->status) | |
954 | r_ep->status = req->status; | |
955 | else | |
956 | r_ep->status = req->actual; | |
957 | spin_unlock_irqrestore(&dev->lock, flags); | |
958 | ||
959 | complete((struct completion *)req->context); | |
960 | } | |
961 | ||
962 | static int raw_process_ep_io(struct raw_dev *dev, struct usb_raw_ep_io *io, | |
963 | void *data, bool in) | |
964 | { | |
965 | int ret = 0; | |
966 | unsigned long flags; | |
97df5e57 | 967 | struct raw_ep *ep; |
f2c2e717 AK |
968 | DECLARE_COMPLETION_ONSTACK(done); |
969 | ||
970 | spin_lock_irqsave(&dev->lock, flags); | |
971 | if (dev->state != STATE_DEV_RUNNING) { | |
972 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
973 | ret = -EINVAL; | |
974 | goto out_unlock; | |
975 | } | |
976 | if (!dev->gadget) { | |
977 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
978 | ret = -EBUSY; | |
979 | goto out_unlock; | |
980 | } | |
97df5e57 AK |
981 | if (io->ep >= dev->eps_num) { |
982 | dev_dbg(&dev->gadget->dev, "fail, invalid endpoint\n"); | |
983 | ret = -EINVAL; | |
984 | goto out_unlock; | |
985 | } | |
986 | ep = &dev->eps[io->ep]; | |
f2c2e717 AK |
987 | if (ep->state != STATE_EP_ENABLED) { |
988 | dev_dbg(&dev->gadget->dev, "fail, endpoint is not enabled\n"); | |
989 | ret = -EBUSY; | |
990 | goto out_unlock; | |
991 | } | |
992 | if (ep->disabling) { | |
993 | dev_dbg(&dev->gadget->dev, | |
994 | "fail, endpoint is already being disabled\n"); | |
995 | ret = -EBUSY; | |
996 | goto out_unlock; | |
997 | } | |
998 | if (ep->urb_queued) { | |
999 | dev_dbg(&dev->gadget->dev, "fail, urb already queued\n"); | |
1000 | ret = -EBUSY; | |
1001 | goto out_unlock; | |
1002 | } | |
1003 | if ((in && !ep->ep->caps.dir_in) || (!in && ep->ep->caps.dir_in)) { | |
1004 | dev_dbg(&dev->gadget->dev, "fail, wrong direction\n"); | |
1005 | ret = -EINVAL; | |
1006 | goto out_unlock; | |
1007 | } | |
1008 | ||
1009 | ep->dev = dev; | |
1010 | ep->req->context = &done; | |
1011 | ep->req->complete = gadget_ep_complete; | |
1012 | ep->req->buf = data; | |
1013 | ep->req->length = io->length; | |
1014 | ep->req->zero = usb_raw_io_flags_zero(io->flags); | |
1015 | ep->urb_queued = true; | |
1016 | spin_unlock_irqrestore(&dev->lock, flags); | |
1017 | ||
1018 | ret = usb_ep_queue(ep->ep, ep->req, GFP_KERNEL); | |
1019 | if (ret) { | |
1020 | dev_err(&dev->gadget->dev, | |
1021 | "fail, usb_ep_queue returned %d\n", ret); | |
1022 | spin_lock_irqsave(&dev->lock, flags); | |
1023 | dev->state = STATE_DEV_FAILED; | |
1024 | goto out_done; | |
1025 | } | |
1026 | ||
1027 | ret = wait_for_completion_interruptible(&done); | |
1028 | if (ret) { | |
1029 | dev_dbg(&dev->gadget->dev, "wait interrupted\n"); | |
1030 | usb_ep_dequeue(ep->ep, ep->req); | |
1031 | wait_for_completion(&done); | |
1032 | spin_lock_irqsave(&dev->lock, flags); | |
1033 | goto out_done; | |
1034 | } | |
1035 | ||
1036 | spin_lock_irqsave(&dev->lock, flags); | |
1037 | ret = ep->status; | |
1038 | ||
1039 | out_done: | |
1040 | ep->urb_queued = false; | |
1041 | out_unlock: | |
1042 | spin_unlock_irqrestore(&dev->lock, flags); | |
1043 | return ret; | |
1044 | } | |
1045 | ||
1046 | static int raw_ioctl_ep_write(struct raw_dev *dev, unsigned long value) | |
1047 | { | |
1048 | int ret = 0; | |
1049 | char *data; | |
1050 | struct usb_raw_ep_io io; | |
1051 | ||
1052 | data = raw_alloc_io_data(&io, (void __user *)value, true); | |
1053 | if (IS_ERR(data)) | |
1054 | return PTR_ERR(data); | |
1055 | ret = raw_process_ep_io(dev, &io, data, true); | |
1056 | kfree(data); | |
1057 | return ret; | |
1058 | } | |
1059 | ||
1060 | static int raw_ioctl_ep_read(struct raw_dev *dev, unsigned long value) | |
1061 | { | |
1062 | int ret = 0; | |
1063 | char *data; | |
1064 | struct usb_raw_ep_io io; | |
1065 | unsigned int length; | |
1066 | ||
1067 | data = raw_alloc_io_data(&io, (void __user *)value, false); | |
1068 | if (IS_ERR(data)) | |
1069 | return PTR_ERR(data); | |
1070 | ret = raw_process_ep_io(dev, &io, data, false); | |
6e507644 | 1071 | if (ret < 0) |
068fbff4 DC |
1072 | goto free; |
1073 | ||
f2c2e717 | 1074 | length = min(io.length, (unsigned int)ret); |
068fbff4 DC |
1075 | if (copy_to_user((void __user *)(value + sizeof(io)), data, length)) |
1076 | ret = -EFAULT; | |
6e507644 AK |
1077 | else |
1078 | ret = length; | |
068fbff4 | 1079 | free: |
f2c2e717 AK |
1080 | kfree(data); |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | static int raw_ioctl_configure(struct raw_dev *dev, unsigned long value) | |
1085 | { | |
1086 | int ret = 0; | |
1087 | unsigned long flags; | |
1088 | ||
1089 | if (value) | |
1090 | return -EINVAL; | |
1091 | spin_lock_irqsave(&dev->lock, flags); | |
1092 | if (dev->state != STATE_DEV_RUNNING) { | |
1093 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
1094 | ret = -EINVAL; | |
1095 | goto out_unlock; | |
1096 | } | |
1097 | if (!dev->gadget) { | |
1098 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
1099 | ret = -EBUSY; | |
1100 | goto out_unlock; | |
1101 | } | |
1102 | usb_gadget_set_state(dev->gadget, USB_STATE_CONFIGURED); | |
1103 | ||
1104 | out_unlock: | |
1105 | spin_unlock_irqrestore(&dev->lock, flags); | |
1106 | return ret; | |
1107 | } | |
1108 | ||
1109 | static int raw_ioctl_vbus_draw(struct raw_dev *dev, unsigned long value) | |
1110 | { | |
1111 | int ret = 0; | |
1112 | unsigned long flags; | |
1113 | ||
1114 | spin_lock_irqsave(&dev->lock, flags); | |
1115 | if (dev->state != STATE_DEV_RUNNING) { | |
1116 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
1117 | ret = -EINVAL; | |
1118 | goto out_unlock; | |
1119 | } | |
1120 | if (!dev->gadget) { | |
1121 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
1122 | ret = -EBUSY; | |
1123 | goto out_unlock; | |
1124 | } | |
1125 | usb_gadget_vbus_draw(dev->gadget, 2 * value); | |
1126 | ||
1127 | out_unlock: | |
1128 | spin_unlock_irqrestore(&dev->lock, flags); | |
1129 | return ret; | |
1130 | } | |
1131 | ||
97df5e57 AK |
1132 | static void fill_ep_caps(struct usb_ep_caps *caps, |
1133 | struct usb_raw_ep_caps *raw_caps) | |
1134 | { | |
1135 | raw_caps->type_control = caps->type_control; | |
1136 | raw_caps->type_iso = caps->type_iso; | |
1137 | raw_caps->type_bulk = caps->type_bulk; | |
1138 | raw_caps->type_int = caps->type_int; | |
1139 | raw_caps->dir_in = caps->dir_in; | |
1140 | raw_caps->dir_out = caps->dir_out; | |
1141 | } | |
1142 | ||
1143 | static void fill_ep_limits(struct usb_ep *ep, struct usb_raw_ep_limits *limits) | |
1144 | { | |
1145 | limits->maxpacket_limit = ep->maxpacket_limit; | |
1146 | limits->max_streams = ep->max_streams; | |
1147 | } | |
1148 | ||
1149 | static int raw_ioctl_eps_info(struct raw_dev *dev, unsigned long value) | |
1150 | { | |
1151 | int ret = 0, i; | |
1152 | unsigned long flags; | |
1153 | struct usb_raw_eps_info *info; | |
1154 | struct raw_ep *ep; | |
1155 | ||
1156 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1157 | if (!info) { | |
1158 | ret = -ENOMEM; | |
1159 | goto out; | |
1160 | } | |
1161 | ||
1162 | spin_lock_irqsave(&dev->lock, flags); | |
1163 | if (dev->state != STATE_DEV_RUNNING) { | |
1164 | dev_dbg(dev->dev, "fail, device is not running\n"); | |
1165 | ret = -EINVAL; | |
1166 | spin_unlock_irqrestore(&dev->lock, flags); | |
1167 | goto out_free; | |
1168 | } | |
1169 | if (!dev->gadget) { | |
1170 | dev_dbg(dev->dev, "fail, gadget is not bound\n"); | |
1171 | ret = -EBUSY; | |
1172 | spin_unlock_irqrestore(&dev->lock, flags); | |
1173 | goto out_free; | |
1174 | } | |
1175 | ||
1176 | memset(info, 0, sizeof(*info)); | |
1177 | for (i = 0; i < dev->eps_num; i++) { | |
1178 | ep = &dev->eps[i]; | |
1179 | strscpy(&info->eps[i].name[0], ep->ep->name, | |
1180 | USB_RAW_EP_NAME_MAX); | |
1181 | info->eps[i].addr = ep->addr; | |
1182 | fill_ep_caps(&ep->ep->caps, &info->eps[i].caps); | |
1183 | fill_ep_limits(ep->ep, &info->eps[i].limits); | |
1184 | } | |
1185 | ret = dev->eps_num; | |
1186 | spin_unlock_irqrestore(&dev->lock, flags); | |
1187 | ||
1188 | if (copy_to_user((void __user *)value, info, sizeof(*info))) | |
1189 | ret = -EFAULT; | |
1190 | ||
1191 | out_free: | |
1192 | kfree(info); | |
1193 | out: | |
1194 | return ret; | |
1195 | } | |
1196 | ||
f2c2e717 AK |
1197 | static long raw_ioctl(struct file *fd, unsigned int cmd, unsigned long value) |
1198 | { | |
1199 | struct raw_dev *dev = fd->private_data; | |
1200 | int ret = 0; | |
1201 | ||
1202 | if (!dev) | |
1203 | return -EBUSY; | |
1204 | ||
1205 | switch (cmd) { | |
1206 | case USB_RAW_IOCTL_INIT: | |
1207 | ret = raw_ioctl_init(dev, value); | |
1208 | break; | |
1209 | case USB_RAW_IOCTL_RUN: | |
1210 | ret = raw_ioctl_run(dev, value); | |
1211 | break; | |
1212 | case USB_RAW_IOCTL_EVENT_FETCH: | |
1213 | ret = raw_ioctl_event_fetch(dev, value); | |
1214 | break; | |
1215 | case USB_RAW_IOCTL_EP0_WRITE: | |
1216 | ret = raw_ioctl_ep0_write(dev, value); | |
1217 | break; | |
1218 | case USB_RAW_IOCTL_EP0_READ: | |
1219 | ret = raw_ioctl_ep0_read(dev, value); | |
1220 | break; | |
1221 | case USB_RAW_IOCTL_EP_ENABLE: | |
1222 | ret = raw_ioctl_ep_enable(dev, value); | |
1223 | break; | |
1224 | case USB_RAW_IOCTL_EP_DISABLE: | |
1225 | ret = raw_ioctl_ep_disable(dev, value); | |
1226 | break; | |
1227 | case USB_RAW_IOCTL_EP_WRITE: | |
1228 | ret = raw_ioctl_ep_write(dev, value); | |
1229 | break; | |
1230 | case USB_RAW_IOCTL_EP_READ: | |
1231 | ret = raw_ioctl_ep_read(dev, value); | |
1232 | break; | |
1233 | case USB_RAW_IOCTL_CONFIGURE: | |
1234 | ret = raw_ioctl_configure(dev, value); | |
1235 | break; | |
1236 | case USB_RAW_IOCTL_VBUS_DRAW: | |
1237 | ret = raw_ioctl_vbus_draw(dev, value); | |
1238 | break; | |
97df5e57 AK |
1239 | case USB_RAW_IOCTL_EPS_INFO: |
1240 | ret = raw_ioctl_eps_info(dev, value); | |
1241 | break; | |
c61769bd AK |
1242 | case USB_RAW_IOCTL_EP0_STALL: |
1243 | ret = raw_ioctl_ep0_stall(dev, value); | |
1244 | break; | |
1245 | case USB_RAW_IOCTL_EP_SET_HALT: | |
1246 | ret = raw_ioctl_ep_set_clear_halt_wedge( | |
1247 | dev, value, true, true); | |
1248 | break; | |
1249 | case USB_RAW_IOCTL_EP_CLEAR_HALT: | |
1250 | ret = raw_ioctl_ep_set_clear_halt_wedge( | |
1251 | dev, value, false, true); | |
1252 | break; | |
1253 | case USB_RAW_IOCTL_EP_SET_WEDGE: | |
1254 | ret = raw_ioctl_ep_set_clear_halt_wedge( | |
1255 | dev, value, true, false); | |
1256 | break; | |
f2c2e717 AK |
1257 | default: |
1258 | ret = -EINVAL; | |
1259 | } | |
1260 | ||
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | /*----------------------------------------------------------------------*/ | |
1265 | ||
1266 | static const struct file_operations raw_fops = { | |
1267 | .open = raw_open, | |
1268 | .unlocked_ioctl = raw_ioctl, | |
1269 | .compat_ioctl = raw_ioctl, | |
1270 | .release = raw_release, | |
1271 | .llseek = no_llseek, | |
1272 | }; | |
1273 | ||
1274 | static struct miscdevice raw_misc_device = { | |
1275 | .minor = MISC_DYNAMIC_MINOR, | |
1276 | .name = DRIVER_NAME, | |
1277 | .fops = &raw_fops, | |
1278 | }; | |
1279 | ||
1280 | module_misc_device(raw_misc_device); |