Commit | Line | Data |
---|---|---|
cdda479f LP |
1 | /* |
2 | * uvc_gadget.c -- USB Video Class Gadget driver | |
3 | * | |
4 | * Copyright (C) 2009-2010 | |
5 | * Laurent Pinchart (laurent.pinchart@ideasonboard.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. | |
cdda479f LP |
11 | */ |
12 | ||
13 | #include <linux/kernel.h> | |
6d11ed76 | 14 | #include <linux/module.h> |
cdda479f LP |
15 | #include <linux/device.h> |
16 | #include <linux/errno.h> | |
17 | #include <linux/fs.h> | |
18 | #include <linux/list.h> | |
19 | #include <linux/mutex.h> | |
4d2079c1 | 20 | #include <linux/string.h> |
cdda479f LP |
21 | #include <linux/usb/ch9.h> |
22 | #include <linux/usb/gadget.h> | |
23 | #include <linux/usb/video.h> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/wait.h> | |
26 | ||
27 | #include <media/v4l2-dev.h> | |
28 | #include <media/v4l2-event.h> | |
29 | ||
46919a23 | 30 | #include "u_uvc.h" |
cdda479f | 31 | #include "uvc.h" |
46919a23 | 32 | #include "uvc_configfs.h" |
3a83c16e AP |
33 | #include "uvc_v4l2.h" |
34 | #include "uvc_video.h" | |
cdda479f | 35 | |
5d9955f8 | 36 | unsigned int uvc_gadget_trace_param; |
fbcaba0e | 37 | |
cdda479f LP |
38 | /* -------------------------------------------------------------------------- |
39 | * Function descriptors | |
40 | */ | |
41 | ||
42 | /* string IDs are assigned dynamically */ | |
43 | ||
43ff05e2 BS |
44 | #define UVC_STRING_CONTROL_IDX 0 |
45 | #define UVC_STRING_STREAMING_IDX 1 | |
cdda479f LP |
46 | |
47 | static struct usb_string uvc_en_us_strings[] = { | |
43ff05e2 | 48 | [UVC_STRING_CONTROL_IDX].s = "UVC Camera", |
cdda479f LP |
49 | [UVC_STRING_STREAMING_IDX].s = "Video Streaming", |
50 | { } | |
51 | }; | |
52 | ||
53 | static struct usb_gadget_strings uvc_stringtab = { | |
54 | .language = 0x0409, /* en-us */ | |
55 | .strings = uvc_en_us_strings, | |
56 | }; | |
57 | ||
58 | static struct usb_gadget_strings *uvc_function_strings[] = { | |
59 | &uvc_stringtab, | |
60 | NULL, | |
61 | }; | |
62 | ||
63 | #define UVC_INTF_VIDEO_CONTROL 0 | |
64 | #define UVC_INTF_VIDEO_STREAMING 1 | |
65 | ||
912ca429 | 66 | #define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */ |
57976636 | 67 | |
6d11ed76 | 68 | static struct usb_interface_assoc_descriptor uvc_iad = { |
bbafc0cb | 69 | .bLength = sizeof(uvc_iad), |
cdda479f LP |
70 | .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, |
71 | .bFirstInterface = 0, | |
72 | .bInterfaceCount = 2, | |
73 | .bFunctionClass = USB_CLASS_VIDEO, | |
bbafc0cb | 74 | .bFunctionSubClass = UVC_SC_VIDEO_INTERFACE_COLLECTION, |
cdda479f LP |
75 | .bFunctionProtocol = 0x00, |
76 | .iFunction = 0, | |
77 | }; | |
78 | ||
6d11ed76 | 79 | static struct usb_interface_descriptor uvc_control_intf = { |
cdda479f LP |
80 | .bLength = USB_DT_INTERFACE_SIZE, |
81 | .bDescriptorType = USB_DT_INTERFACE, | |
82 | .bInterfaceNumber = UVC_INTF_VIDEO_CONTROL, | |
83 | .bAlternateSetting = 0, | |
84 | .bNumEndpoints = 1, | |
85 | .bInterfaceClass = USB_CLASS_VIDEO, | |
bbafc0cb | 86 | .bInterfaceSubClass = UVC_SC_VIDEOCONTROL, |
cdda479f LP |
87 | .bInterfaceProtocol = 0x00, |
88 | .iInterface = 0, | |
89 | }; | |
90 | ||
6d11ed76 | 91 | static struct usb_endpoint_descriptor uvc_control_ep = { |
cdda479f LP |
92 | .bLength = USB_DT_ENDPOINT_SIZE, |
93 | .bDescriptorType = USB_DT_ENDPOINT, | |
94 | .bEndpointAddress = USB_DIR_IN, | |
95 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
912ca429 | 96 | .wMaxPacketSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), |
cdda479f LP |
97 | .bInterval = 8, |
98 | }; | |
99 | ||
6d11ed76 | 100 | static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp = { |
48eee0b4 LP |
101 | .bLength = sizeof(uvc_ss_control_comp), |
102 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
103 | /* The following 3 values can be tweaked if necessary. */ | |
104 | .bMaxBurst = 0, | |
105 | .bmAttributes = 0, | |
106 | .wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), | |
107 | }; | |
108 | ||
6d11ed76 | 109 | static struct uvc_control_endpoint_descriptor uvc_control_cs_ep = { |
cdda479f LP |
110 | .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE, |
111 | .bDescriptorType = USB_DT_CS_ENDPOINT, | |
112 | .bDescriptorSubType = UVC_EP_INTERRUPT, | |
912ca429 | 113 | .wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE), |
cdda479f LP |
114 | }; |
115 | ||
6d11ed76 | 116 | static struct usb_interface_descriptor uvc_streaming_intf_alt0 = { |
cdda479f LP |
117 | .bLength = USB_DT_INTERFACE_SIZE, |
118 | .bDescriptorType = USB_DT_INTERFACE, | |
119 | .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, | |
120 | .bAlternateSetting = 0, | |
121 | .bNumEndpoints = 0, | |
122 | .bInterfaceClass = USB_CLASS_VIDEO, | |
bbafc0cb | 123 | .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, |
cdda479f LP |
124 | .bInterfaceProtocol = 0x00, |
125 | .iInterface = 0, | |
126 | }; | |
127 | ||
6d11ed76 | 128 | static struct usb_interface_descriptor uvc_streaming_intf_alt1 = { |
cdda479f LP |
129 | .bLength = USB_DT_INTERFACE_SIZE, |
130 | .bDescriptorType = USB_DT_INTERFACE, | |
131 | .bInterfaceNumber = UVC_INTF_VIDEO_STREAMING, | |
132 | .bAlternateSetting = 1, | |
133 | .bNumEndpoints = 1, | |
134 | .bInterfaceClass = USB_CLASS_VIDEO, | |
bbafc0cb | 135 | .bInterfaceSubClass = UVC_SC_VIDEOSTREAMING, |
cdda479f LP |
136 | .bInterfaceProtocol = 0x00, |
137 | .iInterface = 0, | |
138 | }; | |
139 | ||
6d11ed76 | 140 | static struct usb_endpoint_descriptor uvc_fs_streaming_ep = { |
cdda479f LP |
141 | .bLength = USB_DT_ENDPOINT_SIZE, |
142 | .bDescriptorType = USB_DT_ENDPOINT, | |
143 | .bEndpointAddress = USB_DIR_IN, | |
609a0532 BS |
144 | .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
145 | | USB_ENDPOINT_XFER_ISOC, | |
20777dde LP |
146 | /* The wMaxPacketSize and bInterval values will be initialized from |
147 | * module parameters. | |
148 | */ | |
cdda479f LP |
149 | }; |
150 | ||
6d11ed76 | 151 | static struct usb_endpoint_descriptor uvc_hs_streaming_ep = { |
fbcaba0e BS |
152 | .bLength = USB_DT_ENDPOINT_SIZE, |
153 | .bDescriptorType = USB_DT_ENDPOINT, | |
154 | .bEndpointAddress = USB_DIR_IN, | |
609a0532 BS |
155 | .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
156 | | USB_ENDPOINT_XFER_ISOC, | |
20777dde LP |
157 | /* The wMaxPacketSize and bInterval values will be initialized from |
158 | * module parameters. | |
159 | */ | |
fbcaba0e BS |
160 | }; |
161 | ||
6d11ed76 | 162 | static struct usb_endpoint_descriptor uvc_ss_streaming_ep = { |
ee6a4d87 LP |
163 | .bLength = USB_DT_ENDPOINT_SIZE, |
164 | .bDescriptorType = USB_DT_ENDPOINT, | |
fbcaba0e | 165 | |
ee6a4d87 | 166 | .bEndpointAddress = USB_DIR_IN, |
609a0532 BS |
167 | .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
168 | | USB_ENDPOINT_XFER_ISOC, | |
20777dde LP |
169 | /* The wMaxPacketSize and bInterval values will be initialized from |
170 | * module parameters. | |
171 | */ | |
fbcaba0e BS |
172 | }; |
173 | ||
6d11ed76 | 174 | static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = { |
ee6a4d87 LP |
175 | .bLength = sizeof(uvc_ss_streaming_comp), |
176 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
dbbafe66 LP |
177 | /* The bMaxBurst, bmAttributes and wBytesPerInterval values will be |
178 | * initialized from module parameters. | |
179 | */ | |
fbcaba0e BS |
180 | }; |
181 | ||
cdda479f LP |
182 | static const struct usb_descriptor_header * const uvc_fs_streaming[] = { |
183 | (struct usb_descriptor_header *) &uvc_streaming_intf_alt1, | |
fbcaba0e | 184 | (struct usb_descriptor_header *) &uvc_fs_streaming_ep, |
cdda479f LP |
185 | NULL, |
186 | }; | |
187 | ||
188 | static const struct usb_descriptor_header * const uvc_hs_streaming[] = { | |
189 | (struct usb_descriptor_header *) &uvc_streaming_intf_alt1, | |
fbcaba0e BS |
190 | (struct usb_descriptor_header *) &uvc_hs_streaming_ep, |
191 | NULL, | |
192 | }; | |
193 | ||
194 | static const struct usb_descriptor_header * const uvc_ss_streaming[] = { | |
195 | (struct usb_descriptor_header *) &uvc_streaming_intf_alt1, | |
196 | (struct usb_descriptor_header *) &uvc_ss_streaming_ep, | |
197 | (struct usb_descriptor_header *) &uvc_ss_streaming_comp, | |
cdda479f LP |
198 | NULL, |
199 | }; | |
200 | ||
6d11ed76 AP |
201 | void uvc_set_trace_param(unsigned int trace) |
202 | { | |
203 | uvc_gadget_trace_param = trace; | |
204 | } | |
205 | EXPORT_SYMBOL(uvc_set_trace_param); | |
206 | ||
cdda479f LP |
207 | /* -------------------------------------------------------------------------- |
208 | * Control requests | |
209 | */ | |
210 | ||
211 | static void | |
212 | uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req) | |
213 | { | |
214 | struct uvc_device *uvc = req->context; | |
215 | struct v4l2_event v4l2_event; | |
216 | struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; | |
217 | ||
218 | if (uvc->event_setup_out) { | |
219 | uvc->event_setup_out = 0; | |
220 | ||
221 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
222 | v4l2_event.type = UVC_EVENT_DATA; | |
223 | uvc_event->data.length = req->actual; | |
224 | memcpy(&uvc_event->data.data, req->buf, req->actual); | |
dbe98b30 | 225 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
226 | } |
227 | } | |
228 | ||
229 | static int | |
230 | uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) | |
231 | { | |
232 | struct uvc_device *uvc = to_uvc(f); | |
233 | struct v4l2_event v4l2_event; | |
234 | struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; | |
235 | ||
236 | /* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n", | |
237 | * ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue), | |
238 | * le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength)); | |
239 | */ | |
240 | ||
241 | if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) { | |
242 | INFO(f->config->cdev, "invalid request type\n"); | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | /* Stall too big requests. */ | |
247 | if (le16_to_cpu(ctrl->wLength) > UVC_MAX_REQUEST_SIZE) | |
248 | return -EINVAL; | |
249 | ||
26a029f2 LP |
250 | /* Tell the complete callback to generate an event for the next request |
251 | * that will be enqueued by UVCIOC_SEND_RESPONSE. | |
252 | */ | |
253 | uvc->event_setup_out = !(ctrl->bRequestType & USB_DIR_IN); | |
254 | uvc->event_length = le16_to_cpu(ctrl->wLength); | |
255 | ||
cdda479f LP |
256 | memset(&v4l2_event, 0, sizeof(v4l2_event)); |
257 | v4l2_event.type = UVC_EVENT_SETUP; | |
258 | memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req)); | |
dbe98b30 | 259 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f | 260 | |
4fbac520 PC |
261 | /* Pass additional setup data to userspace */ |
262 | if (uvc->event_setup_out && uvc->event_length) { | |
263 | uvc->control_req->length = uvc->event_length; | |
264 | return usb_ep_queue(uvc->func.config->cdev->gadget->ep0, | |
265 | uvc->control_req, GFP_ATOMIC); | |
266 | } | |
267 | ||
cdda479f LP |
268 | return 0; |
269 | } | |
270 | ||
41837c35 BS |
271 | void uvc_function_setup_continue(struct uvc_device *uvc) |
272 | { | |
273 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
274 | ||
275 | usb_composite_setup_continue(cdev); | |
276 | } | |
277 | ||
cdda479f LP |
278 | static int |
279 | uvc_function_get_alt(struct usb_function *f, unsigned interface) | |
280 | { | |
281 | struct uvc_device *uvc = to_uvc(f); | |
282 | ||
283 | INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface); | |
284 | ||
285 | if (interface == uvc->control_intf) | |
286 | return 0; | |
287 | else if (interface != uvc->streaming_intf) | |
288 | return -EINVAL; | |
289 | else | |
d62bf8c1 | 290 | return uvc->video.ep->enabled ? 1 : 0; |
cdda479f LP |
291 | } |
292 | ||
293 | static int | |
294 | uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt) | |
295 | { | |
296 | struct uvc_device *uvc = to_uvc(f); | |
c92bae75 | 297 | struct usb_composite_dev *cdev = f->config->cdev; |
cdda479f LP |
298 | struct v4l2_event v4l2_event; |
299 | struct uvc_event *uvc_event = (void *)&v4l2_event.u.data; | |
fbcaba0e | 300 | int ret; |
cdda479f | 301 | |
c92bae75 | 302 | INFO(cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt); |
cdda479f LP |
303 | |
304 | if (interface == uvc->control_intf) { | |
305 | if (alt) | |
306 | return -EINVAL; | |
307 | ||
d62bf8c1 RB |
308 | INFO(cdev, "reset UVC Control\n"); |
309 | usb_ep_disable(uvc->control_ep); | |
62e37078 FB |
310 | |
311 | if (!uvc->control_ep->desc) | |
312 | if (config_ep_by_speed(cdev->gadget, f, uvc->control_ep)) | |
313 | return -EINVAL; | |
314 | ||
315 | usb_ep_enable(uvc->control_ep); | |
62e37078 | 316 | |
cdda479f LP |
317 | if (uvc->state == UVC_STATE_DISCONNECTED) { |
318 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
319 | v4l2_event.type = UVC_EVENT_CONNECT; | |
c92bae75 | 320 | uvc_event->speed = cdev->gadget->speed; |
dbe98b30 | 321 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
322 | |
323 | uvc->state = UVC_STATE_CONNECTED; | |
324 | } | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | if (interface != uvc->streaming_intf) | |
330 | return -EINVAL; | |
331 | ||
332 | /* TODO | |
333 | if (usb_endpoint_xfer_bulk(&uvc->desc.vs_ep)) | |
334 | return alt ? -EINVAL : 0; | |
335 | */ | |
336 | ||
337 | switch (alt) { | |
338 | case 0: | |
339 | if (uvc->state != UVC_STATE_STREAMING) | |
340 | return 0; | |
341 | ||
d62bf8c1 | 342 | if (uvc->video.ep) |
cdda479f LP |
343 | usb_ep_disable(uvc->video.ep); |
344 | ||
345 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
346 | v4l2_event.type = UVC_EVENT_STREAMOFF; | |
dbe98b30 | 347 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
348 | |
349 | uvc->state = UVC_STATE_CONNECTED; | |
41837c35 | 350 | return 0; |
cdda479f LP |
351 | |
352 | case 1: | |
353 | if (uvc->state != UVC_STATE_CONNECTED) | |
354 | return 0; | |
355 | ||
c92bae75 FB |
356 | if (!uvc->video.ep) |
357 | return -EINVAL; | |
358 | ||
d62bf8c1 RB |
359 | INFO(cdev, "reset UVC\n"); |
360 | usb_ep_disable(uvc->video.ep); | |
cdda479f | 361 | |
c92bae75 FB |
362 | ret = config_ep_by_speed(f->config->cdev->gadget, |
363 | &(uvc->func), uvc->video.ep); | |
364 | if (ret) | |
365 | return ret; | |
366 | usb_ep_enable(uvc->video.ep); | |
c92bae75 | 367 | |
cdda479f LP |
368 | memset(&v4l2_event, 0, sizeof(v4l2_event)); |
369 | v4l2_event.type = UVC_EVENT_STREAMON; | |
dbe98b30 | 370 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
41837c35 | 371 | return USB_GADGET_DELAYED_STATUS; |
cdda479f LP |
372 | |
373 | default: | |
374 | return -EINVAL; | |
375 | } | |
cdda479f LP |
376 | } |
377 | ||
378 | static void | |
379 | uvc_function_disable(struct usb_function *f) | |
380 | { | |
381 | struct uvc_device *uvc = to_uvc(f); | |
382 | struct v4l2_event v4l2_event; | |
383 | ||
384 | INFO(f->config->cdev, "uvc_function_disable\n"); | |
385 | ||
386 | memset(&v4l2_event, 0, sizeof(v4l2_event)); | |
387 | v4l2_event.type = UVC_EVENT_DISCONNECT; | |
dbe98b30 | 388 | v4l2_event_queue(&uvc->vdev, &v4l2_event); |
cdda479f LP |
389 | |
390 | uvc->state = UVC_STATE_DISCONNECTED; | |
e3122f5f | 391 | |
d62bf8c1 RB |
392 | usb_ep_disable(uvc->video.ep); |
393 | usb_ep_disable(uvc->control_ep); | |
cdda479f LP |
394 | } |
395 | ||
396 | /* -------------------------------------------------------------------------- | |
397 | * Connection / disconnection | |
398 | */ | |
399 | ||
400 | void | |
401 | uvc_function_connect(struct uvc_device *uvc) | |
402 | { | |
403 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
404 | int ret; | |
405 | ||
406 | if ((ret = usb_function_activate(&uvc->func)) < 0) | |
407 | INFO(cdev, "UVC connect failed with %d\n", ret); | |
408 | } | |
409 | ||
410 | void | |
411 | uvc_function_disconnect(struct uvc_device *uvc) | |
412 | { | |
413 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
414 | int ret; | |
415 | ||
416 | if ((ret = usb_function_deactivate(&uvc->func)) < 0) | |
417 | INFO(cdev, "UVC disconnect failed with %d\n", ret); | |
418 | } | |
419 | ||
420 | /* -------------------------------------------------------------------------- | |
421 | * USB probe and disconnect | |
422 | */ | |
423 | ||
424 | static int | |
425 | uvc_register_video(struct uvc_device *uvc) | |
426 | { | |
427 | struct usb_composite_dev *cdev = uvc->func.config->cdev; | |
cdda479f LP |
428 | |
429 | /* TODO reference counting. */ | |
dbe98b30 HV |
430 | uvc->vdev.v4l2_dev = &uvc->v4l2_dev; |
431 | uvc->vdev.fops = &uvc_v4l2_fops; | |
432 | uvc->vdev.ioctl_ops = &uvc_v4l2_ioctl_ops; | |
433 | uvc->vdev.release = video_device_release_empty; | |
434 | uvc->vdev.vfl_dir = VFL_DIR_TX; | |
435 | uvc->vdev.lock = &uvc->video.mutex; | |
436 | strlcpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name)); | |
437 | ||
438 | video_set_drvdata(&uvc->vdev, uvc); | |
439 | ||
440 | return video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1); | |
cdda479f LP |
441 | } |
442 | ||
443 | #define UVC_COPY_DESCRIPTOR(mem, dst, desc) \ | |
444 | do { \ | |
445 | memcpy(mem, desc, (desc)->bLength); \ | |
446 | *(dst)++ = mem; \ | |
447 | mem += (desc)->bLength; \ | |
448 | } while (0); | |
449 | ||
450 | #define UVC_COPY_DESCRIPTORS(mem, dst, src) \ | |
451 | do { \ | |
452 | const struct usb_descriptor_header * const *__src; \ | |
453 | for (__src = src; *__src; ++__src) { \ | |
454 | memcpy(mem, *__src, (*__src)->bLength); \ | |
455 | *dst++ = mem; \ | |
456 | mem += (*__src)->bLength; \ | |
457 | } \ | |
458 | } while (0) | |
459 | ||
6d11ed76 | 460 | static struct usb_descriptor_header ** |
cdda479f LP |
461 | uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed) |
462 | { | |
463 | struct uvc_input_header_descriptor *uvc_streaming_header; | |
464 | struct uvc_header_descriptor *uvc_control_header; | |
fbcaba0e | 465 | const struct uvc_descriptor_header * const *uvc_control_desc; |
cdda479f LP |
466 | const struct uvc_descriptor_header * const *uvc_streaming_cls; |
467 | const struct usb_descriptor_header * const *uvc_streaming_std; | |
468 | const struct usb_descriptor_header * const *src; | |
469 | struct usb_descriptor_header **dst; | |
470 | struct usb_descriptor_header **hdr; | |
471 | unsigned int control_size; | |
472 | unsigned int streaming_size; | |
473 | unsigned int n_desc; | |
474 | unsigned int bytes; | |
475 | void *mem; | |
476 | ||
fbcaba0e BS |
477 | switch (speed) { |
478 | case USB_SPEED_SUPER: | |
479 | uvc_control_desc = uvc->desc.ss_control; | |
480 | uvc_streaming_cls = uvc->desc.ss_streaming; | |
481 | uvc_streaming_std = uvc_ss_streaming; | |
fbcaba0e BS |
482 | break; |
483 | ||
484 | case USB_SPEED_HIGH: | |
485 | uvc_control_desc = uvc->desc.fs_control; | |
486 | uvc_streaming_cls = uvc->desc.hs_streaming; | |
487 | uvc_streaming_std = uvc_hs_streaming; | |
fbcaba0e BS |
488 | break; |
489 | ||
490 | case USB_SPEED_FULL: | |
491 | default: | |
492 | uvc_control_desc = uvc->desc.fs_control; | |
493 | uvc_streaming_cls = uvc->desc.fs_streaming; | |
494 | uvc_streaming_std = uvc_fs_streaming; | |
fbcaba0e BS |
495 | break; |
496 | } | |
cdda479f | 497 | |
6c25955e AP |
498 | if (!uvc_control_desc || !uvc_streaming_cls) |
499 | return ERR_PTR(-ENODEV); | |
500 | ||
cdda479f LP |
501 | /* Descriptors layout |
502 | * | |
503 | * uvc_iad | |
504 | * uvc_control_intf | |
505 | * Class-specific UVC control descriptors | |
506 | * uvc_control_ep | |
507 | * uvc_control_cs_ep | |
48eee0b4 | 508 | * uvc_ss_control_comp (for SS only) |
cdda479f LP |
509 | * uvc_streaming_intf_alt0 |
510 | * Class-specific UVC streaming descriptors | |
511 | * uvc_{fs|hs}_streaming | |
512 | */ | |
513 | ||
514 | /* Count descriptors and compute their size. */ | |
515 | control_size = 0; | |
516 | streaming_size = 0; | |
517 | bytes = uvc_iad.bLength + uvc_control_intf.bLength | |
48eee0b4 | 518 | + uvc_control_ep.bLength + uvc_control_cs_ep.bLength |
cdda479f | 519 | + uvc_streaming_intf_alt0.bLength; |
cdda479f | 520 | |
fbcaba0e BS |
521 | if (speed == USB_SPEED_SUPER) { |
522 | bytes += uvc_ss_control_comp.bLength; | |
523 | n_desc = 6; | |
524 | } else { | |
525 | n_desc = 5; | |
526 | } | |
527 | ||
528 | for (src = (const struct usb_descriptor_header **)uvc_control_desc; | |
ee6a4d87 | 529 | *src; ++src) { |
cdda479f LP |
530 | control_size += (*src)->bLength; |
531 | bytes += (*src)->bLength; | |
532 | n_desc++; | |
533 | } | |
fbcaba0e | 534 | for (src = (const struct usb_descriptor_header **)uvc_streaming_cls; |
ee6a4d87 | 535 | *src; ++src) { |
cdda479f LP |
536 | streaming_size += (*src)->bLength; |
537 | bytes += (*src)->bLength; | |
538 | n_desc++; | |
539 | } | |
540 | for (src = uvc_streaming_std; *src; ++src) { | |
541 | bytes += (*src)->bLength; | |
542 | n_desc++; | |
543 | } | |
544 | ||
545 | mem = kmalloc((n_desc + 1) * sizeof(*src) + bytes, GFP_KERNEL); | |
546 | if (mem == NULL) | |
547 | return NULL; | |
548 | ||
549 | hdr = mem; | |
550 | dst = mem; | |
551 | mem += (n_desc + 1) * sizeof(*src); | |
552 | ||
553 | /* Copy the descriptors. */ | |
554 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_iad); | |
555 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_intf); | |
556 | ||
557 | uvc_control_header = mem; | |
558 | UVC_COPY_DESCRIPTORS(mem, dst, | |
fbcaba0e | 559 | (const struct usb_descriptor_header **)uvc_control_desc); |
cdda479f LP |
560 | uvc_control_header->wTotalLength = cpu_to_le16(control_size); |
561 | uvc_control_header->bInCollection = 1; | |
562 | uvc_control_header->baInterfaceNr[0] = uvc->streaming_intf; | |
563 | ||
48eee0b4 | 564 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_ep); |
fbcaba0e BS |
565 | if (speed == USB_SPEED_SUPER) |
566 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_ss_control_comp); | |
567 | ||
cdda479f LP |
568 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_control_cs_ep); |
569 | UVC_COPY_DESCRIPTOR(mem, dst, &uvc_streaming_intf_alt0); | |
570 | ||
571 | uvc_streaming_header = mem; | |
572 | UVC_COPY_DESCRIPTORS(mem, dst, | |
573 | (const struct usb_descriptor_header**)uvc_streaming_cls); | |
574 | uvc_streaming_header->wTotalLength = cpu_to_le16(streaming_size); | |
0485ec0d | 575 | uvc_streaming_header->bEndpointAddress = uvc->video.ep->address; |
cdda479f LP |
576 | |
577 | UVC_COPY_DESCRIPTORS(mem, dst, uvc_streaming_std); | |
578 | ||
579 | *dst = NULL; | |
580 | return hdr; | |
581 | } | |
582 | ||
6d11ed76 | 583 | static int |
cdda479f LP |
584 | uvc_function_bind(struct usb_configuration *c, struct usb_function *f) |
585 | { | |
586 | struct usb_composite_dev *cdev = c->cdev; | |
587 | struct uvc_device *uvc = to_uvc(f); | |
13443799 | 588 | struct usb_string *us; |
20777dde LP |
589 | unsigned int max_packet_mult; |
590 | unsigned int max_packet_size; | |
cdda479f | 591 | struct usb_ep *ep; |
6d11ed76 | 592 | struct f_uvc_opts *opts; |
cdda479f LP |
593 | int ret = -EINVAL; |
594 | ||
595 | INFO(cdev, "uvc_function_bind\n"); | |
596 | ||
bbea6de1 | 597 | opts = fi_to_f_uvc_opts(f->fi); |
6d11ed76 AP |
598 | /* Sanity check the streaming endpoint module parameters. |
599 | */ | |
600 | opts->streaming_interval = clamp(opts->streaming_interval, 1U, 16U); | |
601 | opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, 1U, 3072U); | |
602 | opts->streaming_maxburst = min(opts->streaming_maxburst, 15U); | |
603 | ||
604 | /* Fill in the FS/HS/SS Video Streaming specific descriptors from the | |
605 | * module parameters. | |
606 | * | |
607 | * NOTE: We assume that the user knows what they are doing and won't | |
608 | * give parameters that their UDC doesn't support. | |
609 | */ | |
610 | if (opts->streaming_maxpacket <= 1024) { | |
611 | max_packet_mult = 1; | |
612 | max_packet_size = opts->streaming_maxpacket; | |
613 | } else if (opts->streaming_maxpacket <= 2048) { | |
614 | max_packet_mult = 2; | |
615 | max_packet_size = opts->streaming_maxpacket / 2; | |
616 | } else { | |
617 | max_packet_mult = 3; | |
618 | max_packet_size = opts->streaming_maxpacket / 3; | |
619 | } | |
620 | ||
621 | uvc_fs_streaming_ep.wMaxPacketSize = | |
e102609f | 622 | cpu_to_le16(min(opts->streaming_maxpacket, 1023U)); |
6d11ed76 AP |
623 | uvc_fs_streaming_ep.bInterval = opts->streaming_interval; |
624 | ||
e102609f LP |
625 | uvc_hs_streaming_ep.wMaxPacketSize = |
626 | cpu_to_le16(max_packet_size | ((max_packet_mult - 1) << 11)); | |
6d11ed76 AP |
627 | uvc_hs_streaming_ep.bInterval = opts->streaming_interval; |
628 | ||
e102609f | 629 | uvc_ss_streaming_ep.wMaxPacketSize = cpu_to_le16(max_packet_size); |
6d11ed76 AP |
630 | uvc_ss_streaming_ep.bInterval = opts->streaming_interval; |
631 | uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1; | |
632 | uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst; | |
633 | uvc_ss_streaming_comp.wBytesPerInterval = | |
e102609f LP |
634 | cpu_to_le16(max_packet_size * max_packet_mult * |
635 | opts->streaming_maxburst); | |
20777dde | 636 | |
cdda479f | 637 | /* Allocate endpoints. */ |
48eee0b4 | 638 | ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); |
cdda479f LP |
639 | if (!ep) { |
640 | INFO(cdev, "Unable to allocate control EP\n"); | |
641 | goto error; | |
642 | } | |
643 | uvc->control_ep = ep; | |
cdda479f | 644 | |
0485ec0d LP |
645 | if (gadget_is_superspeed(c->cdev->gadget)) |
646 | ep = usb_ep_autoconfig_ss(cdev->gadget, &uvc_ss_streaming_ep, | |
647 | &uvc_ss_streaming_comp); | |
648 | else if (gadget_is_dualspeed(cdev->gadget)) | |
649 | ep = usb_ep_autoconfig(cdev->gadget, &uvc_hs_streaming_ep); | |
650 | else | |
651 | ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep); | |
652 | ||
cdda479f LP |
653 | if (!ep) { |
654 | INFO(cdev, "Unable to allocate streaming EP\n"); | |
655 | goto error; | |
656 | } | |
657 | uvc->video.ep = ep; | |
cdda479f | 658 | |
0485ec0d LP |
659 | uvc_fs_streaming_ep.bEndpointAddress = uvc->video.ep->address; |
660 | uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address; | |
661 | uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address; | |
20777dde | 662 | |
13443799 AP |
663 | us = usb_gstrings_attach(cdev, uvc_function_strings, |
664 | ARRAY_SIZE(uvc_en_us_strings)); | |
665 | if (IS_ERR(us)) { | |
666 | ret = PTR_ERR(us); | |
667 | goto error; | |
6d11ed76 | 668 | } |
13443799 AP |
669 | uvc_iad.iFunction = us[UVC_STRING_CONTROL_IDX].id; |
670 | uvc_control_intf.iInterface = us[UVC_STRING_CONTROL_IDX].id; | |
671 | ret = us[UVC_STRING_STREAMING_IDX].id; | |
672 | uvc_streaming_intf_alt0.iInterface = ret; | |
673 | uvc_streaming_intf_alt1.iInterface = ret; | |
6d11ed76 | 674 | |
cdda479f LP |
675 | /* Allocate interface IDs. */ |
676 | if ((ret = usb_interface_id(c, f)) < 0) | |
677 | goto error; | |
678 | uvc_iad.bFirstInterface = ret; | |
679 | uvc_control_intf.bInterfaceNumber = ret; | |
680 | uvc->control_intf = ret; | |
681 | ||
682 | if ((ret = usb_interface_id(c, f)) < 0) | |
683 | goto error; | |
684 | uvc_streaming_intf_alt0.bInterfaceNumber = ret; | |
685 | uvc_streaming_intf_alt1.bInterfaceNumber = ret; | |
686 | uvc->streaming_intf = ret; | |
687 | ||
10287bae SAS |
688 | /* Copy descriptors */ |
689 | f->fs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_FULL); | |
6c25955e AP |
690 | if (IS_ERR(f->fs_descriptors)) { |
691 | ret = PTR_ERR(f->fs_descriptors); | |
692 | f->fs_descriptors = NULL; | |
693 | goto error; | |
694 | } | |
695 | if (gadget_is_dualspeed(cdev->gadget)) { | |
10287bae | 696 | f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH); |
6c25955e AP |
697 | if (IS_ERR(f->hs_descriptors)) { |
698 | ret = PTR_ERR(f->hs_descriptors); | |
699 | f->hs_descriptors = NULL; | |
700 | goto error; | |
701 | } | |
702 | } | |
703 | if (gadget_is_superspeed(c->cdev->gadget)) { | |
fbcaba0e | 704 | f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER); |
6c25955e AP |
705 | if (IS_ERR(f->ss_descriptors)) { |
706 | ret = PTR_ERR(f->ss_descriptors); | |
707 | f->ss_descriptors = NULL; | |
708 | goto error; | |
709 | } | |
710 | } | |
cdda479f LP |
711 | |
712 | /* Preallocate control endpoint request. */ | |
713 | uvc->control_req = usb_ep_alloc_request(cdev->gadget->ep0, GFP_KERNEL); | |
714 | uvc->control_buf = kmalloc(UVC_MAX_REQUEST_SIZE, GFP_KERNEL); | |
715 | if (uvc->control_req == NULL || uvc->control_buf == NULL) { | |
716 | ret = -ENOMEM; | |
717 | goto error; | |
718 | } | |
719 | ||
720 | uvc->control_req->buf = uvc->control_buf; | |
721 | uvc->control_req->complete = uvc_function_ep0_complete; | |
722 | uvc->control_req->context = uvc; | |
723 | ||
b60f9aa1 HV |
724 | if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) { |
725 | printk(KERN_INFO "v4l2_device_register failed\n"); | |
726 | goto error; | |
727 | } | |
728 | ||
cdda479f | 729 | /* Initialise video. */ |
7ea95b11 | 730 | ret = uvcg_video_init(&uvc->video); |
cdda479f LP |
731 | if (ret < 0) |
732 | goto error; | |
733 | ||
734 | /* Register a V4L2 device. */ | |
735 | ret = uvc_register_video(uvc); | |
736 | if (ret < 0) { | |
737 | printk(KERN_INFO "Unable to register video device\n"); | |
738 | goto error; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | ||
743 | error: | |
b60f9aa1 | 744 | v4l2_device_unregister(&uvc->v4l2_dev); |
0f9df939 | 745 | |
e7379857 | 746 | if (uvc->control_req) |
0f9df939 | 747 | usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); |
e7379857 | 748 | kfree(uvc->control_buf); |
0f9df939 | 749 | |
10287bae | 750 | usb_free_all_descriptors(f); |
cdda479f LP |
751 | return ret; |
752 | } | |
753 | ||
754 | /* -------------------------------------------------------------------------- | |
755 | * USB gadget function | |
756 | */ | |
757 | ||
6d11ed76 AP |
758 | static void uvc_free_inst(struct usb_function_instance *f) |
759 | { | |
bbea6de1 | 760 | struct f_uvc_opts *opts = fi_to_f_uvc_opts(f); |
6d11ed76 | 761 | |
46919a23 | 762 | mutex_destroy(&opts->lock); |
6d11ed76 AP |
763 | kfree(opts); |
764 | } | |
765 | ||
766 | static struct usb_function_instance *uvc_alloc_inst(void) | |
767 | { | |
768 | struct f_uvc_opts *opts; | |
46919a23 AP |
769 | struct uvc_camera_terminal_descriptor *cd; |
770 | struct uvc_processing_unit_descriptor *pd; | |
771 | struct uvc_output_terminal_descriptor *od; | |
772 | struct uvc_color_matching_descriptor *md; | |
773 | struct uvc_descriptor_header **ctl_cls; | |
6d11ed76 AP |
774 | |
775 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
776 | if (!opts) | |
777 | return ERR_PTR(-ENOMEM); | |
778 | opts->func_inst.free_func_inst = uvc_free_inst; | |
46919a23 AP |
779 | mutex_init(&opts->lock); |
780 | ||
781 | cd = &opts->uvc_camera_terminal; | |
782 | cd->bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3); | |
783 | cd->bDescriptorType = USB_DT_CS_INTERFACE; | |
784 | cd->bDescriptorSubType = UVC_VC_INPUT_TERMINAL; | |
785 | cd->bTerminalID = 1; | |
786 | cd->wTerminalType = cpu_to_le16(0x0201); | |
787 | cd->bAssocTerminal = 0; | |
788 | cd->iTerminal = 0; | |
789 | cd->wObjectiveFocalLengthMin = cpu_to_le16(0); | |
790 | cd->wObjectiveFocalLengthMax = cpu_to_le16(0); | |
791 | cd->wOcularFocalLength = cpu_to_le16(0); | |
792 | cd->bControlSize = 3; | |
793 | cd->bmControls[0] = 2; | |
794 | cd->bmControls[1] = 0; | |
795 | cd->bmControls[2] = 0; | |
796 | ||
797 | pd = &opts->uvc_processing; | |
798 | pd->bLength = UVC_DT_PROCESSING_UNIT_SIZE(2); | |
799 | pd->bDescriptorType = USB_DT_CS_INTERFACE; | |
800 | pd->bDescriptorSubType = UVC_VC_PROCESSING_UNIT; | |
801 | pd->bUnitID = 2; | |
802 | pd->bSourceID = 1; | |
803 | pd->wMaxMultiplier = cpu_to_le16(16*1024); | |
804 | pd->bControlSize = 2; | |
805 | pd->bmControls[0] = 1; | |
806 | pd->bmControls[1] = 0; | |
807 | pd->iProcessing = 0; | |
808 | ||
809 | od = &opts->uvc_output_terminal; | |
810 | od->bLength = UVC_DT_OUTPUT_TERMINAL_SIZE; | |
811 | od->bDescriptorType = USB_DT_CS_INTERFACE; | |
812 | od->bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL; | |
813 | od->bTerminalID = 3; | |
814 | od->wTerminalType = cpu_to_le16(0x0101); | |
815 | od->bAssocTerminal = 0; | |
816 | od->bSourceID = 2; | |
817 | od->iTerminal = 0; | |
818 | ||
819 | md = &opts->uvc_color_matching; | |
820 | md->bLength = UVC_DT_COLOR_MATCHING_SIZE; | |
821 | md->bDescriptorType = USB_DT_CS_INTERFACE; | |
822 | md->bDescriptorSubType = UVC_VS_COLORFORMAT; | |
823 | md->bColorPrimaries = 1; | |
824 | md->bTransferCharacteristics = 1; | |
825 | md->bMatrixCoefficients = 4; | |
826 | ||
827 | /* Prepare fs control class descriptors for configfs-based gadgets */ | |
828 | ctl_cls = opts->uvc_fs_control_cls; | |
829 | ctl_cls[0] = NULL; /* assigned elsewhere by configfs */ | |
830 | ctl_cls[1] = (struct uvc_descriptor_header *)cd; | |
831 | ctl_cls[2] = (struct uvc_descriptor_header *)pd; | |
832 | ctl_cls[3] = (struct uvc_descriptor_header *)od; | |
833 | ctl_cls[4] = NULL; /* NULL-terminate */ | |
834 | opts->fs_control = | |
835 | (const struct uvc_descriptor_header * const *)ctl_cls; | |
836 | ||
837 | /* Prepare hs control class descriptors for configfs-based gadgets */ | |
838 | ctl_cls = opts->uvc_ss_control_cls; | |
839 | ctl_cls[0] = NULL; /* assigned elsewhere by configfs */ | |
840 | ctl_cls[1] = (struct uvc_descriptor_header *)cd; | |
841 | ctl_cls[2] = (struct uvc_descriptor_header *)pd; | |
842 | ctl_cls[3] = (struct uvc_descriptor_header *)od; | |
843 | ctl_cls[4] = NULL; /* NULL-terminate */ | |
844 | opts->ss_control = | |
845 | (const struct uvc_descriptor_header * const *)ctl_cls; | |
846 | ||
847 | opts->streaming_interval = 1; | |
848 | opts->streaming_maxpacket = 1024; | |
849 | ||
850 | uvcg_attach_configfs(opts); | |
6d11ed76 AP |
851 | return &opts->func_inst; |
852 | } | |
853 | ||
854 | static void uvc_free(struct usb_function *f) | |
855 | { | |
856 | struct uvc_device *uvc = to_uvc(f); | |
46919a23 AP |
857 | struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts, |
858 | func_inst); | |
859 | --opts->refcnt; | |
6d11ed76 AP |
860 | kfree(uvc); |
861 | } | |
862 | ||
863 | static void uvc_unbind(struct usb_configuration *c, struct usb_function *f) | |
864 | { | |
865 | struct usb_composite_dev *cdev = c->cdev; | |
866 | struct uvc_device *uvc = to_uvc(f); | |
867 | ||
868 | INFO(cdev, "%s\n", __func__); | |
869 | ||
dbe98b30 | 870 | video_unregister_device(&uvc->vdev); |
6d11ed76 | 871 | v4l2_device_unregister(&uvc->v4l2_dev); |
6d11ed76 | 872 | |
6d11ed76 AP |
873 | usb_ep_free_request(cdev->gadget->ep0, uvc->control_req); |
874 | kfree(uvc->control_buf); | |
875 | ||
876 | usb_free_all_descriptors(f); | |
877 | } | |
878 | ||
4a6698b8 | 879 | static struct usb_function *uvc_alloc(struct usb_function_instance *fi) |
6d11ed76 AP |
880 | { |
881 | struct uvc_device *uvc; | |
882 | struct f_uvc_opts *opts; | |
46919a23 | 883 | struct uvc_descriptor_header **strm_cls; |
6d11ed76 AP |
884 | |
885 | uvc = kzalloc(sizeof(*uvc), GFP_KERNEL); | |
886 | if (uvc == NULL) | |
887 | return ERR_PTR(-ENOMEM); | |
888 | ||
d8e96c4b | 889 | mutex_init(&uvc->video.mutex); |
6d11ed76 | 890 | uvc->state = UVC_STATE_DISCONNECTED; |
bbea6de1 | 891 | opts = fi_to_f_uvc_opts(fi); |
6d11ed76 | 892 | |
46919a23 AP |
893 | mutex_lock(&opts->lock); |
894 | if (opts->uvc_fs_streaming_cls) { | |
895 | strm_cls = opts->uvc_fs_streaming_cls; | |
896 | opts->fs_streaming = | |
897 | (const struct uvc_descriptor_header * const *)strm_cls; | |
898 | } | |
899 | if (opts->uvc_hs_streaming_cls) { | |
900 | strm_cls = opts->uvc_hs_streaming_cls; | |
901 | opts->hs_streaming = | |
902 | (const struct uvc_descriptor_header * const *)strm_cls; | |
903 | } | |
904 | if (opts->uvc_ss_streaming_cls) { | |
905 | strm_cls = opts->uvc_ss_streaming_cls; | |
906 | opts->ss_streaming = | |
907 | (const struct uvc_descriptor_header * const *)strm_cls; | |
908 | } | |
909 | ||
6d11ed76 AP |
910 | uvc->desc.fs_control = opts->fs_control; |
911 | uvc->desc.ss_control = opts->ss_control; | |
912 | uvc->desc.fs_streaming = opts->fs_streaming; | |
913 | uvc->desc.hs_streaming = opts->hs_streaming; | |
914 | uvc->desc.ss_streaming = opts->ss_streaming; | |
46919a23 AP |
915 | ++opts->refcnt; |
916 | mutex_unlock(&opts->lock); | |
6d11ed76 AP |
917 | |
918 | /* Register the function. */ | |
919 | uvc->func.name = "uvc"; | |
6d11ed76 AP |
920 | uvc->func.bind = uvc_function_bind; |
921 | uvc->func.unbind = uvc_unbind; | |
922 | uvc->func.get_alt = uvc_function_get_alt; | |
923 | uvc->func.set_alt = uvc_function_set_alt; | |
924 | uvc->func.disable = uvc_function_disable; | |
925 | uvc->func.setup = uvc_function_setup; | |
926 | uvc->func.free_func = uvc_free; | |
f277bf27 | 927 | uvc->func.bind_deactivated = true; |
6d11ed76 AP |
928 | |
929 | return &uvc->func; | |
930 | } | |
931 | ||
932 | DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc); | |
933 | MODULE_LICENSE("GPL"); | |
934 | MODULE_AUTHOR("Laurent Pinchart"); |