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b6a0ca11 IK |
1 | /* |
2 | * Copyright (C) 2015 Karol Kosik <karo9@interia.eu> | |
3 | * Copyright (C) 2015-2016 Samsung Electronics | |
4 | * Igor Kotrasinski <i.kotrasinsk@samsung.com> | |
5 | * Krzysztof Opasiak <k.opasiak@samsung.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 as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <linux/device.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/usb.h> | |
26 | #include <linux/usb/gadget.h> | |
27 | #include <linux/usb/hcd.h> | |
28 | #include <linux/kthread.h> | |
29 | #include <linux/file.h> | |
30 | #include <linux/byteorder/generic.h> | |
31 | ||
32 | #include "usbip_common.h" | |
33 | #include "vudc.h" | |
34 | ||
35 | #define VIRTUAL_ENDPOINTS (1 /* ep0 */ + 15 /* in eps */ + 15 /* out eps */) | |
36 | ||
37 | /* urb-related structures alloc / free */ | |
38 | ||
39 | ||
40 | static void free_urb(struct urb *urb) | |
41 | { | |
42 | if (!urb) | |
43 | return; | |
44 | ||
45 | kfree(urb->setup_packet); | |
46 | urb->setup_packet = NULL; | |
47 | ||
48 | kfree(urb->transfer_buffer); | |
49 | urb->transfer_buffer = NULL; | |
50 | ||
51 | usb_free_urb(urb); | |
52 | } | |
53 | ||
54 | struct urbp *alloc_urbp(void) | |
55 | { | |
56 | struct urbp *urb_p; | |
57 | ||
58 | urb_p = kzalloc(sizeof(*urb_p), GFP_KERNEL); | |
59 | if (!urb_p) | |
60 | return urb_p; | |
61 | ||
62 | urb_p->urb = NULL; | |
63 | urb_p->ep = NULL; | |
64 | INIT_LIST_HEAD(&urb_p->urb_entry); | |
65 | return urb_p; | |
66 | } | |
67 | ||
68 | static void free_urbp(struct urbp *urb_p) | |
69 | { | |
70 | kfree(urb_p); | |
71 | } | |
72 | ||
73 | void free_urbp_and_urb(struct urbp *urb_p) | |
74 | { | |
75 | if (!urb_p) | |
76 | return; | |
77 | free_urb(urb_p->urb); | |
78 | free_urbp(urb_p); | |
79 | } | |
80 | ||
81 | ||
82 | /* utilities ; almost verbatim from dummy_hcd.c */ | |
83 | ||
84 | /* called with spinlock held */ | |
85 | static void nuke(struct vudc *udc, struct vep *ep) | |
86 | { | |
87 | struct vrequest *req; | |
88 | ||
89 | while (!list_empty(&ep->req_queue)) { | |
90 | req = list_first_entry(&ep->req_queue, struct vrequest, | |
91 | req_entry); | |
92 | list_del_init(&req->req_entry); | |
93 | req->req.status = -ESHUTDOWN; | |
94 | ||
95 | spin_unlock(&udc->lock); | |
96 | usb_gadget_giveback_request(&ep->ep, &req->req); | |
97 | spin_lock(&udc->lock); | |
98 | } | |
99 | } | |
100 | ||
101 | /* caller must hold lock */ | |
102 | static void stop_activity(struct vudc *udc) | |
103 | { | |
104 | int i; | |
105 | struct urbp *urb_p, *tmp; | |
106 | ||
107 | udc->address = 0; | |
108 | ||
109 | for (i = 0; i < VIRTUAL_ENDPOINTS; i++) | |
110 | nuke(udc, &udc->ep[i]); | |
111 | ||
112 | list_for_each_entry_safe(urb_p, tmp, &udc->urb_queue, urb_entry) { | |
113 | list_del(&urb_p->urb_entry); | |
114 | free_urbp_and_urb(urb_p); | |
115 | } | |
116 | } | |
117 | ||
0255cf9e | 118 | struct vep *vudc_find_endpoint(struct vudc *udc, u8 address) |
b6a0ca11 IK |
119 | { |
120 | int i; | |
121 | ||
122 | if ((address & ~USB_DIR_IN) == 0) | |
123 | return &udc->ep[0]; | |
124 | ||
125 | for (i = 1; i < VIRTUAL_ENDPOINTS; i++) { | |
126 | struct vep *ep = &udc->ep[i]; | |
127 | ||
128 | if (!ep->desc) | |
129 | continue; | |
130 | if (ep->desc->bEndpointAddress == address) | |
131 | return ep; | |
132 | } | |
133 | return NULL; | |
134 | } | |
135 | ||
136 | /* gadget ops */ | |
137 | ||
138 | /* FIXME - this will probably misbehave when suspend/resume is added */ | |
139 | static int vgadget_get_frame(struct usb_gadget *_gadget) | |
140 | { | |
141 | struct timeval now; | |
142 | struct vudc *udc = usb_gadget_to_vudc(_gadget); | |
143 | ||
144 | do_gettimeofday(&now); | |
145 | return ((now.tv_sec - udc->start_time.tv_sec) * 1000 + | |
146 | (now.tv_usec - udc->start_time.tv_usec) / 1000) | |
147 | % 0x7FF; | |
148 | } | |
149 | ||
150 | static int vgadget_set_selfpowered(struct usb_gadget *_gadget, int value) | |
151 | { | |
152 | struct vudc *udc = usb_gadget_to_vudc(_gadget); | |
153 | ||
154 | if (value) | |
155 | udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
156 | else | |
157 | udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static int vgadget_pullup(struct usb_gadget *_gadget, int value) | |
162 | { | |
163 | struct vudc *udc = usb_gadget_to_vudc(_gadget); | |
164 | unsigned long flags; | |
165 | int ret; | |
166 | ||
167 | ||
168 | spin_lock_irqsave(&udc->lock, flags); | |
169 | value = !!value; | |
170 | if (value == udc->pullup) | |
171 | goto unlock; | |
172 | ||
173 | udc->pullup = value; | |
174 | if (value) { | |
175 | udc->gadget.speed = min_t(u8, USB_SPEED_HIGH, | |
176 | udc->driver->max_speed); | |
177 | udc->ep[0].ep.maxpacket = 64; | |
178 | /* | |
179 | * This is the first place where we can ask our | |
180 | * gadget driver for descriptors. | |
181 | */ | |
182 | ret = get_gadget_descs(udc); | |
183 | if (ret) { | |
184 | dev_err(&udc->gadget.dev, "Unable go get desc: %d", ret); | |
185 | goto unlock; | |
186 | } | |
187 | ||
188 | spin_unlock_irqrestore(&udc->lock, flags); | |
189 | usbip_start_eh(&udc->ud); | |
190 | } else { | |
191 | /* Invalidate descriptors */ | |
192 | udc->desc_cached = 0; | |
193 | ||
194 | spin_unlock_irqrestore(&udc->lock, flags); | |
195 | usbip_event_add(&udc->ud, VUDC_EVENT_REMOVED); | |
196 | usbip_stop_eh(&udc->ud); /* Wait for eh completion */ | |
197 | } | |
198 | ||
199 | return 0; | |
200 | ||
201 | unlock: | |
202 | spin_unlock_irqrestore(&udc->lock, flags); | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static int vgadget_udc_start(struct usb_gadget *g, | |
207 | struct usb_gadget_driver *driver) | |
208 | { | |
209 | struct vudc *udc = usb_gadget_to_vudc(g); | |
210 | unsigned long flags; | |
211 | ||
212 | spin_lock_irqsave(&udc->lock, flags); | |
213 | udc->driver = driver; | |
214 | udc->pullup = udc->connected = udc->desc_cached = 0; | |
215 | spin_unlock_irqrestore(&udc->lock, flags); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | static int vgadget_udc_stop(struct usb_gadget *g) | |
221 | { | |
222 | struct vudc *udc = usb_gadget_to_vudc(g); | |
223 | unsigned long flags; | |
224 | ||
225 | spin_lock_irqsave(&udc->lock, flags); | |
226 | udc->driver = NULL; | |
227 | spin_unlock_irqrestore(&udc->lock, flags); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static const struct usb_gadget_ops vgadget_ops = { | |
232 | .get_frame = vgadget_get_frame, | |
233 | .set_selfpowered = vgadget_set_selfpowered, | |
234 | .pullup = vgadget_pullup, | |
235 | .udc_start = vgadget_udc_start, | |
236 | .udc_stop = vgadget_udc_stop, | |
237 | }; | |
238 | ||
239 | ||
240 | /* endpoint ops */ | |
241 | ||
242 | static int vep_enable(struct usb_ep *_ep, | |
243 | const struct usb_endpoint_descriptor *desc) | |
244 | { | |
1f0c41dd JK |
245 | struct vep *ep; |
246 | struct vudc *udc; | |
247 | unsigned int maxp; | |
248 | unsigned long flags; | |
b6a0ca11 IK |
249 | |
250 | ep = to_vep(_ep); | |
251 | udc = ep_to_vudc(ep); | |
252 | ||
253 | if (!_ep || !desc || ep->desc || _ep->caps.type_control | |
254 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
255 | return -EINVAL; | |
256 | ||
257 | if (!udc->driver) | |
258 | return -ESHUTDOWN; | |
259 | ||
260 | spin_lock_irqsave(&udc->lock, flags); | |
261 | ||
14f91dd5 | 262 | maxp = usb_endpoint_maxp(desc); |
b6a0ca11 IK |
263 | _ep->maxpacket = maxp; |
264 | ep->desc = desc; | |
265 | ep->type = usb_endpoint_type(desc); | |
266 | ep->halted = ep->wedged = 0; | |
267 | ||
268 | spin_unlock_irqrestore(&udc->lock, flags); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static int vep_disable(struct usb_ep *_ep) | |
274 | { | |
275 | struct vep *ep; | |
276 | struct vudc *udc; | |
277 | unsigned long flags; | |
278 | ||
279 | ep = to_vep(_ep); | |
280 | udc = ep_to_vudc(ep); | |
281 | if (!_ep || !ep->desc || _ep->caps.type_control) | |
282 | return -EINVAL; | |
283 | ||
284 | spin_lock_irqsave(&udc->lock, flags); | |
285 | ep->desc = NULL; | |
286 | nuke(udc, ep); | |
287 | spin_unlock_irqrestore(&udc->lock, flags); | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | static struct usb_request *vep_alloc_request(struct usb_ep *_ep, | |
293 | gfp_t mem_flags) | |
294 | { | |
295 | struct vep *ep; | |
296 | struct vrequest *req; | |
297 | ||
298 | if (!_ep) | |
299 | return NULL; | |
300 | ep = to_vep(_ep); | |
301 | ||
302 | req = kzalloc(sizeof(*req), mem_flags); | |
303 | if (!req) | |
304 | return NULL; | |
305 | ||
306 | INIT_LIST_HEAD(&req->req_entry); | |
307 | ||
308 | return &req->req; | |
309 | } | |
310 | ||
311 | static void vep_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
312 | { | |
313 | struct vrequest *req; | |
314 | ||
2bdf6ea5 | 315 | if (WARN_ON(!_ep || !_req)) |
b6a0ca11 | 316 | return; |
2bdf6ea5 | 317 | |
b6a0ca11 IK |
318 | req = to_vrequest(_req); |
319 | kfree(req); | |
320 | } | |
321 | ||
322 | static int vep_queue(struct usb_ep *_ep, struct usb_request *_req, | |
323 | gfp_t mem_flags) | |
324 | { | |
325 | struct vep *ep; | |
326 | struct vrequest *req; | |
327 | struct vudc *udc; | |
328 | unsigned long flags; | |
329 | ||
330 | if (!_ep || !_req) | |
331 | return -EINVAL; | |
332 | ||
333 | ep = to_vep(_ep); | |
334 | req = to_vrequest(_req); | |
335 | udc = ep_to_vudc(ep); | |
336 | ||
337 | spin_lock_irqsave(&udc->lock, flags); | |
338 | _req->actual = 0; | |
339 | _req->status = -EINPROGRESS; | |
340 | ||
341 | list_add_tail(&req->req_entry, &ep->req_queue); | |
342 | spin_unlock_irqrestore(&udc->lock, flags); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static int vep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
348 | { | |
349 | struct vep *ep; | |
350 | struct vrequest *req; | |
351 | struct vudc *udc; | |
352 | struct vrequest *lst; | |
353 | unsigned long flags; | |
354 | int ret = -EINVAL; | |
355 | ||
356 | if (!_ep || !_req) | |
357 | return ret; | |
358 | ||
359 | ep = to_vep(_ep); | |
360 | req = to_vrequest(_req); | |
361 | udc = req->udc; | |
362 | ||
363 | if (!udc->driver) | |
364 | return -ESHUTDOWN; | |
365 | ||
366 | spin_lock_irqsave(&udc->lock, flags); | |
367 | list_for_each_entry(lst, &ep->req_queue, req_entry) { | |
368 | if (&lst->req == _req) { | |
369 | list_del_init(&lst->req_entry); | |
370 | _req->status = -ECONNRESET; | |
371 | ret = 0; | |
372 | break; | |
373 | } | |
374 | } | |
375 | spin_unlock_irqrestore(&udc->lock, flags); | |
376 | ||
377 | if (ret == 0) | |
378 | usb_gadget_giveback_request(_ep, _req); | |
379 | ||
380 | return ret; | |
381 | } | |
382 | ||
383 | static int | |
384 | vep_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) | |
385 | { | |
386 | struct vep *ep; | |
387 | struct vudc *udc; | |
388 | unsigned long flags; | |
389 | int ret = 0; | |
390 | ||
391 | ep = to_vep(_ep); | |
392 | if (!_ep) | |
393 | return -EINVAL; | |
394 | ||
395 | udc = ep_to_vudc(ep); | |
396 | if (!udc->driver) | |
397 | return -ESHUTDOWN; | |
398 | ||
399 | spin_lock_irqsave(&udc->lock, flags); | |
400 | if (!value) | |
401 | ep->halted = ep->wedged = 0; | |
402 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
403 | !list_empty(&ep->req_queue)) | |
404 | ret = -EAGAIN; | |
405 | else { | |
406 | ep->halted = 1; | |
407 | if (wedged) | |
408 | ep->wedged = 1; | |
409 | } | |
410 | ||
411 | spin_unlock_irqrestore(&udc->lock, flags); | |
412 | return ret; | |
413 | } | |
414 | ||
415 | static int | |
416 | vep_set_halt(struct usb_ep *_ep, int value) | |
417 | { | |
418 | return vep_set_halt_and_wedge(_ep, value, 0); | |
419 | } | |
420 | ||
421 | static int vep_set_wedge(struct usb_ep *_ep) | |
422 | { | |
423 | return vep_set_halt_and_wedge(_ep, 1, 1); | |
424 | } | |
425 | ||
426 | static const struct usb_ep_ops vep_ops = { | |
427 | .enable = vep_enable, | |
428 | .disable = vep_disable, | |
429 | ||
430 | .alloc_request = vep_alloc_request, | |
431 | .free_request = vep_free_request, | |
432 | ||
433 | .queue = vep_queue, | |
434 | .dequeue = vep_dequeue, | |
435 | ||
436 | .set_halt = vep_set_halt, | |
437 | .set_wedge = vep_set_wedge, | |
438 | }; | |
439 | ||
440 | ||
441 | /* shutdown / reset / error handlers */ | |
442 | ||
443 | static void vudc_shutdown(struct usbip_device *ud) | |
444 | { | |
445 | struct vudc *udc = container_of(ud, struct vudc, ud); | |
446 | int call_disconnect = 0; | |
447 | unsigned long flags; | |
448 | ||
449 | dev_dbg(&udc->pdev->dev, "device shutdown"); | |
450 | if (ud->tcp_socket) | |
451 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); | |
452 | ||
1328f7b9 | 453 | if (ud->tcp_rx) { |
b6a0ca11 IK |
454 | kthread_stop_put(ud->tcp_rx); |
455 | ud->tcp_rx = NULL; | |
456 | } | |
457 | if (ud->tcp_tx) { | |
458 | kthread_stop_put(ud->tcp_tx); | |
459 | ud->tcp_tx = NULL; | |
460 | } | |
461 | ||
462 | if (ud->tcp_socket) { | |
463 | sockfd_put(ud->tcp_socket); | |
464 | ud->tcp_socket = NULL; | |
465 | } | |
466 | ||
467 | spin_lock_irqsave(&udc->lock, flags); | |
468 | stop_activity(udc); | |
469 | if (udc->connected && udc->driver->disconnect) | |
470 | call_disconnect = 1; | |
471 | udc->connected = 0; | |
472 | spin_unlock_irqrestore(&udc->lock, flags); | |
473 | if (call_disconnect) | |
474 | udc->driver->disconnect(&udc->gadget); | |
475 | } | |
476 | ||
477 | static void vudc_device_reset(struct usbip_device *ud) | |
478 | { | |
479 | struct vudc *udc = container_of(ud, struct vudc, ud); | |
480 | unsigned long flags; | |
481 | ||
482 | dev_dbg(&udc->pdev->dev, "device reset"); | |
483 | spin_lock_irqsave(&udc->lock, flags); | |
484 | stop_activity(udc); | |
485 | spin_unlock_irqrestore(&udc->lock, flags); | |
486 | if (udc->driver) | |
487 | usb_gadget_udc_reset(&udc->gadget, udc->driver); | |
488 | spin_lock_irqsave(&ud->lock, flags); | |
489 | ud->status = SDEV_ST_AVAILABLE; | |
490 | spin_unlock_irqrestore(&ud->lock, flags); | |
491 | } | |
492 | ||
493 | static void vudc_device_unusable(struct usbip_device *ud) | |
494 | { | |
495 | unsigned long flags; | |
496 | ||
497 | spin_lock_irqsave(&ud->lock, flags); | |
498 | ud->status = SDEV_ST_ERROR; | |
499 | spin_unlock_irqrestore(&ud->lock, flags); | |
500 | } | |
501 | ||
502 | /* device setup / cleanup */ | |
503 | ||
504 | struct vudc_device *alloc_vudc_device(int devid) | |
505 | { | |
506 | struct vudc_device *udc_dev = NULL; | |
507 | ||
508 | udc_dev = kzalloc(sizeof(*udc_dev), GFP_KERNEL); | |
509 | if (!udc_dev) | |
510 | goto out; | |
511 | ||
512 | INIT_LIST_HEAD(&udc_dev->dev_entry); | |
513 | ||
514 | udc_dev->pdev = platform_device_alloc(GADGET_NAME, devid); | |
515 | if (!udc_dev->pdev) { | |
516 | kfree(udc_dev); | |
517 | udc_dev = NULL; | |
518 | } | |
519 | ||
520 | out: | |
521 | return udc_dev; | |
522 | } | |
523 | ||
524 | void put_vudc_device(struct vudc_device *udc_dev) | |
525 | { | |
526 | platform_device_put(udc_dev->pdev); | |
527 | kfree(udc_dev); | |
528 | } | |
529 | ||
530 | static int init_vudc_hw(struct vudc *udc) | |
531 | { | |
532 | int i; | |
533 | struct usbip_device *ud = &udc->ud; | |
534 | struct vep *ep; | |
535 | ||
536 | udc->ep = kcalloc(VIRTUAL_ENDPOINTS, sizeof(*udc->ep), GFP_KERNEL); | |
537 | if (!udc->ep) | |
538 | goto nomem_ep; | |
539 | ||
540 | INIT_LIST_HEAD(&udc->gadget.ep_list); | |
541 | ||
542 | /* create ep0 and 15 in, 15 out general purpose eps */ | |
543 | for (i = 0; i < VIRTUAL_ENDPOINTS; ++i) { | |
544 | int is_out = i % 2; | |
545 | int num = (i + 1) / 2; | |
546 | ||
547 | ep = &udc->ep[i]; | |
548 | ||
549 | sprintf(ep->name, "ep%d%s", num, | |
550 | i ? (is_out ? "out" : "in") : ""); | |
551 | ep->ep.name = ep->name; | |
b282a118 KO |
552 | |
553 | ep->ep.ops = &vep_ops; | |
554 | ||
555 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); | |
556 | ep->ep.max_streams = 16; | |
557 | ep->gadget = &udc->gadget; | |
558 | INIT_LIST_HEAD(&ep->req_queue); | |
559 | ||
b6a0ca11 | 560 | if (i == 0) { |
b282a118 | 561 | /* ep0 */ |
b6a0ca11 IK |
562 | ep->ep.caps.type_control = true; |
563 | ep->ep.caps.dir_out = true; | |
564 | ep->ep.caps.dir_in = true; | |
b282a118 KO |
565 | |
566 | udc->gadget.ep0 = &ep->ep; | |
b6a0ca11 | 567 | } else { |
b282a118 | 568 | /* All other eps */ |
b6a0ca11 IK |
569 | ep->ep.caps.type_iso = true; |
570 | ep->ep.caps.type_int = true; | |
571 | ep->ep.caps.type_bulk = true; | |
b6a0ca11 | 572 | |
b282a118 KO |
573 | if (is_out) |
574 | ep->ep.caps.dir_out = true; | |
575 | else | |
576 | ep->ep.caps.dir_in = true; | |
b6a0ca11 | 577 | |
b282a118 KO |
578 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); |
579 | } | |
b6a0ca11 IK |
580 | } |
581 | ||
582 | spin_lock_init(&udc->lock); | |
583 | spin_lock_init(&udc->lock_tx); | |
584 | INIT_LIST_HEAD(&udc->urb_queue); | |
585 | INIT_LIST_HEAD(&udc->tx_queue); | |
586 | init_waitqueue_head(&udc->tx_waitq); | |
587 | ||
588 | spin_lock_init(&ud->lock); | |
589 | ud->status = SDEV_ST_AVAILABLE; | |
590 | ud->side = USBIP_VUDC; | |
591 | ||
592 | ud->eh_ops.shutdown = vudc_shutdown; | |
593 | ud->eh_ops.reset = vudc_device_reset; | |
594 | ud->eh_ops.unusable = vudc_device_unusable; | |
595 | ||
b6a0ca11 IK |
596 | v_init_timer(udc); |
597 | return 0; | |
598 | ||
599 | nomem_ep: | |
600 | return -ENOMEM; | |
601 | } | |
602 | ||
603 | static void cleanup_vudc_hw(struct vudc *udc) | |
604 | { | |
605 | kfree(udc->ep); | |
606 | } | |
607 | ||
608 | /* platform driver ops */ | |
609 | ||
610 | int vudc_probe(struct platform_device *pdev) | |
611 | { | |
612 | struct vudc *udc; | |
613 | int ret = -ENOMEM; | |
614 | ||
615 | udc = kzalloc(sizeof(*udc), GFP_KERNEL); | |
616 | if (!udc) | |
617 | goto out; | |
618 | ||
619 | udc->gadget.name = GADGET_NAME; | |
620 | udc->gadget.ops = &vgadget_ops; | |
621 | udc->gadget.max_speed = USB_SPEED_HIGH; | |
622 | udc->gadget.dev.parent = &pdev->dev; | |
623 | udc->pdev = pdev; | |
624 | ||
625 | ret = init_vudc_hw(udc); | |
626 | if (ret) | |
627 | goto err_init_vudc_hw; | |
628 | ||
629 | ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget); | |
630 | if (ret < 0) | |
631 | goto err_add_udc; | |
632 | ||
633 | ret = sysfs_create_group(&pdev->dev.kobj, &vudc_attr_group); | |
634 | if (ret) { | |
635 | dev_err(&udc->pdev->dev, "create sysfs files\n"); | |
636 | goto err_sysfs; | |
637 | } | |
638 | ||
639 | platform_set_drvdata(pdev, udc); | |
640 | ||
641 | return ret; | |
642 | ||
643 | err_sysfs: | |
644 | usb_del_gadget_udc(&udc->gadget); | |
645 | err_add_udc: | |
646 | cleanup_vudc_hw(udc); | |
647 | err_init_vudc_hw: | |
648 | kfree(udc); | |
649 | out: | |
650 | return ret; | |
651 | } | |
652 | ||
653 | int vudc_remove(struct platform_device *pdev) | |
654 | { | |
655 | struct vudc *udc = platform_get_drvdata(pdev); | |
656 | ||
657 | sysfs_remove_group(&pdev->dev.kobj, &vudc_attr_group); | |
658 | usb_del_gadget_udc(&udc->gadget); | |
659 | cleanup_vudc_hw(udc); | |
660 | kfree(udc); | |
661 | return 0; | |
662 | } |