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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * uvc_v4l2.c -- USB Video Class Gadget driver
4 *
5 * Copyright (C) 2009-2010
6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 */
8
9#include <linux/device.h>
10#include <linux/errno.h>
11#include <linux/kernel.h>
12#include <linux/list.h>
13#include <linux/usb/g_uvc.h>
14#include <linux/usb/uvc.h>
15#include <linux/videodev2.h>
16#include <linux/vmalloc.h>
17#include <linux/wait.h>
18
19#include <media/v4l2-dev.h>
20#include <media/v4l2-event.h>
21#include <media/v4l2-ioctl.h>
22
23#include "f_uvc.h"
24#include "uvc.h"
25#include "uvc_queue.h"
26#include "uvc_video.h"
27#include "uvc_v4l2.h"
28#include "uvc_configfs.h"
29
30static const struct uvc_format_desc *to_uvc_format(struct uvcg_format *uformat)
31{
32 char guid[16] = UVC_GUID_FORMAT_MJPEG;
33 const struct uvc_format_desc *format;
34
35 if (uformat->type == UVCG_UNCOMPRESSED) {
36 struct uvcg_uncompressed *unc;
37
38 unc = to_uvcg_uncompressed(&uformat->group.cg_item);
39 if (!unc)
40 return ERR_PTR(-EINVAL);
41
42 memcpy(guid, unc->desc.guidFormat, sizeof(guid));
43 } else if (uformat->type == UVCG_FRAMEBASED) {
44 struct uvcg_framebased *unc;
45
46 unc = to_uvcg_framebased(&uformat->group.cg_item);
47 if (!unc)
48 return ERR_PTR(-EINVAL);
49
50 memcpy(guid, unc->desc.guidFormat, sizeof(guid));
51 }
52
53 format = uvc_format_by_guid(guid);
54 if (!format)
55 return ERR_PTR(-EINVAL);
56
57 return format;
58}
59
60static int uvc_v4l2_get_bytesperline(struct uvcg_format *uformat,
61 struct uvcg_frame *uframe)
62{
63 struct uvcg_uncompressed *u;
64
65 if (uformat->type == UVCG_UNCOMPRESSED) {
66 u = to_uvcg_uncompressed(&uformat->group.cg_item);
67 if (!u)
68 return 0;
69
70 return u->desc.bBitsPerPixel * uframe->frame.w_width / 8;
71 }
72
73 return 0;
74}
75
76static int uvc_get_frame_size(struct uvcg_format *uformat,
77 struct uvcg_frame *uframe)
78{
79 unsigned int bpl = uvc_v4l2_get_bytesperline(uformat, uframe);
80
81 return bpl ? bpl * uframe->frame.w_height :
82 uframe->frame.dw_max_video_frame_buffer_size;
83}
84
85static struct uvcg_format *find_format_by_index(struct uvc_device *uvc, int index)
86{
87 struct uvcg_format_ptr *format;
88 struct uvcg_format *uformat = NULL;
89 int i = 1;
90
91 list_for_each_entry(format, &uvc->header->formats, entry) {
92 if (index == i) {
93 uformat = format->fmt;
94 break;
95 }
96 i++;
97 }
98
99 return uformat;
100}
101
102static struct uvcg_frame *find_frame_by_index(struct uvc_device *uvc,
103 struct uvcg_format *uformat,
104 int index)
105{
106 struct uvcg_format_ptr *format;
107 struct uvcg_frame_ptr *frame;
108 struct uvcg_frame *uframe = NULL;
109
110 list_for_each_entry(format, &uvc->header->formats, entry) {
111 if (format->fmt->type != uformat->type)
112 continue;
113 list_for_each_entry(frame, &format->fmt->frames, entry) {
114 if (index == frame->frm->frame.b_frame_index) {
115 uframe = frame->frm;
116 break;
117 }
118 }
119 }
120
121 return uframe;
122}
123
124static struct uvcg_format *find_format_by_pix(struct uvc_device *uvc,
125 u32 pixelformat)
126{
127 struct uvcg_format_ptr *format;
128 struct uvcg_format *uformat = NULL;
129
130 list_for_each_entry(format, &uvc->header->formats, entry) {
131 const struct uvc_format_desc *fmtdesc = to_uvc_format(format->fmt);
132
133 if (IS_ERR(fmtdesc))
134 continue;
135
136 if (fmtdesc->fcc == pixelformat) {
137 uformat = format->fmt;
138 break;
139 }
140 }
141
142 return uformat;
143}
144
145static struct uvcg_frame *find_closest_frame_by_size(struct uvc_device *uvc,
146 struct uvcg_format *uformat,
147 u16 rw, u16 rh)
148{
149 struct uvc_video *video = &uvc->video;
150 struct uvcg_format_ptr *format;
151 struct uvcg_frame_ptr *frame;
152 struct uvcg_frame *uframe = NULL;
153 unsigned int d, maxd;
154
155 /* Find the closest image size. The distance between image sizes is
156 * the size in pixels of the non-overlapping regions between the
157 * requested size and the frame-specified size.
158 */
159 maxd = (unsigned int)-1;
160
161 list_for_each_entry(format, &uvc->header->formats, entry) {
162 if (format->fmt->type != uformat->type)
163 continue;
164
165 list_for_each_entry(frame, &format->fmt->frames, entry) {
166 u16 w, h;
167
168 w = frame->frm->frame.w_width;
169 h = frame->frm->frame.w_height;
170
171 d = min(w, rw) * min(h, rh);
172 d = w*h + rw*rh - 2*d;
173 if (d < maxd) {
174 maxd = d;
175 uframe = frame->frm;
176 }
177
178 if (maxd == 0)
179 break;
180 }
181 }
182
183 if (!uframe)
184 uvcg_dbg(&video->uvc->func, "Unsupported size %ux%u\n", rw, rh);
185
186 return uframe;
187}
188
189/* --------------------------------------------------------------------------
190 * Requests handling
191 */
192
193static int
194uvc_send_response(struct uvc_device *uvc, struct uvc_request_data *data)
195{
196 struct usb_composite_dev *cdev = uvc->func.config->cdev;
197 struct usb_request *req = uvc->control_req;
198
199 if (data->length < 0)
200 return usb_ep_set_halt(cdev->gadget->ep0);
201
202 req->length = min_t(unsigned int, uvc->event_length, data->length);
203 req->zero = data->length < uvc->event_length;
204
205 memcpy(req->buf, data->data, req->length);
206
207 return usb_ep_queue(cdev->gadget->ep0, req, GFP_KERNEL);
208}
209
210/* --------------------------------------------------------------------------
211 * V4L2 ioctls
212 */
213
214static int
215uvc_v4l2_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
216{
217 struct video_device *vdev = video_devdata(file);
218 struct uvc_device *uvc = video_get_drvdata(vdev);
219 struct usb_composite_dev *cdev = uvc->func.config->cdev;
220
221 strscpy(cap->driver, "g_uvc", sizeof(cap->driver));
222 strscpy(cap->card, cdev->gadget->name, sizeof(cap->card));
223 strscpy(cap->bus_info, dev_name(&cdev->gadget->dev),
224 sizeof(cap->bus_info));
225 return 0;
226}
227
228static int
229uvc_v4l2_get_format(struct file *file, void *fh, struct v4l2_format *fmt)
230{
231 struct video_device *vdev = video_devdata(file);
232 struct uvc_device *uvc = video_get_drvdata(vdev);
233 struct uvc_video *video = &uvc->video;
234
235 fmt->fmt.pix.pixelformat = video->fcc;
236 fmt->fmt.pix.width = video->width;
237 fmt->fmt.pix.height = video->height;
238 fmt->fmt.pix.field = V4L2_FIELD_NONE;
239 fmt->fmt.pix.bytesperline = video->bpp * video->width / 8;
240 fmt->fmt.pix.sizeimage = video->imagesize;
241 fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
242 fmt->fmt.pix.priv = 0;
243
244 return 0;
245}
246
247static int
248uvc_v4l2_try_format(struct file *file, void *fh, struct v4l2_format *fmt)
249{
250 struct video_device *vdev = video_devdata(file);
251 struct uvc_device *uvc = video_get_drvdata(vdev);
252 struct uvc_video *video = &uvc->video;
253 struct uvcg_format *uformat;
254 struct uvcg_frame *uframe;
255 const struct uvc_format_desc *fmtdesc;
256 u8 *fcc;
257
258 if (fmt->type != video->queue.queue.type)
259 return -EINVAL;
260
261 fcc = (u8 *)&fmt->fmt.pix.pixelformat;
262 uvcg_dbg(&uvc->func, "Trying format 0x%08x (%c%c%c%c): %ux%u\n",
263 fmt->fmt.pix.pixelformat,
264 fcc[0], fcc[1], fcc[2], fcc[3],
265 fmt->fmt.pix.width, fmt->fmt.pix.height);
266
267 uformat = find_format_by_pix(uvc, fmt->fmt.pix.pixelformat);
268 if (!uformat)
269 return -EINVAL;
270
271 uframe = find_closest_frame_by_size(uvc, uformat,
272 fmt->fmt.pix.width, fmt->fmt.pix.height);
273 if (!uframe)
274 return -EINVAL;
275
276 if (uformat->type == UVCG_UNCOMPRESSED) {
277 struct uvcg_uncompressed *u =
278 to_uvcg_uncompressed(&uformat->group.cg_item);
279 if (!u)
280 return 0;
281
282 v4l2_fill_pixfmt(&fmt->fmt.pix, fmt->fmt.pix.pixelformat,
283 uframe->frame.w_width, uframe->frame.w_height);
284
285 if (fmt->fmt.pix.sizeimage != (uvc_v4l2_get_bytesperline(uformat, uframe) *
286 uframe->frame.w_height))
287 return -EINVAL;
288 } else {
289 fmt->fmt.pix.width = uframe->frame.w_width;
290 fmt->fmt.pix.height = uframe->frame.w_height;
291 fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(uformat, uframe);
292 fmt->fmt.pix.sizeimage = uvc_get_frame_size(uformat, uframe);
293 fmtdesc = to_uvc_format(uformat);
294 if (IS_ERR(fmtdesc))
295 return PTR_ERR(fmtdesc);
296 fmt->fmt.pix.pixelformat = fmtdesc->fcc;
297 }
298 fmt->fmt.pix.field = V4L2_FIELD_NONE;
299 fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
300 fmt->fmt.pix.priv = 0;
301
302 return 0;
303}
304
305static int
306uvc_v4l2_set_format(struct file *file, void *fh, struct v4l2_format *fmt)
307{
308 struct video_device *vdev = video_devdata(file);
309 struct uvc_device *uvc = video_get_drvdata(vdev);
310 struct uvc_video *video = &uvc->video;
311 int ret;
312
313 ret = uvc_v4l2_try_format(file, fh, fmt);
314 if (ret)
315 return ret;
316
317 video->fcc = fmt->fmt.pix.pixelformat;
318 video->bpp = fmt->fmt.pix.bytesperline * 8 / video->width;
319 video->width = fmt->fmt.pix.width;
320 video->height = fmt->fmt.pix.height;
321 video->imagesize = fmt->fmt.pix.sizeimage;
322
323 return ret;
324}
325
326static int uvc_v4l2_g_parm(struct file *file, void *fh,
327 struct v4l2_streamparm *parm)
328{
329 struct video_device *vdev = video_devdata(file);
330 struct uvc_device *uvc = video_get_drvdata(vdev);
331 struct uvc_video *video = &uvc->video;
332 struct v4l2_fract timeperframe;
333
334 if (!V4L2_TYPE_IS_OUTPUT(parm->type))
335 return -EINVAL;
336
337 /* Return the actual frame period. */
338 timeperframe.numerator = video->interval;
339 timeperframe.denominator = 10000000;
340 v4l2_simplify_fraction(&timeperframe.numerator,
341 &timeperframe.denominator, 8, 333);
342
343 uvcg_dbg(&uvc->func, "Getting frame interval of %u/%u (%u)\n",
344 timeperframe.numerator, timeperframe.denominator,
345 video->interval);
346
347 parm->parm.output.timeperframe = timeperframe;
348 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
349
350 return 0;
351}
352
353static int uvc_v4l2_s_parm(struct file *file, void *fh,
354 struct v4l2_streamparm *parm)
355{
356 struct video_device *vdev = video_devdata(file);
357 struct uvc_device *uvc = video_get_drvdata(vdev);
358 struct uvc_video *video = &uvc->video;
359 struct v4l2_fract timeperframe;
360
361 if (!V4L2_TYPE_IS_OUTPUT(parm->type))
362 return -EINVAL;
363
364 timeperframe = parm->parm.output.timeperframe;
365
366 video->interval = v4l2_fraction_to_interval(timeperframe.numerator,
367 timeperframe.denominator);
368
369 uvcg_dbg(&uvc->func, "Setting frame interval to %u/%u (%u)\n",
370 timeperframe.numerator, timeperframe.denominator,
371 video->interval);
372
373 return 0;
374}
375
376static int
377uvc_v4l2_enum_frameintervals(struct file *file, void *fh,
378 struct v4l2_frmivalenum *fival)
379{
380 struct video_device *vdev = video_devdata(file);
381 struct uvc_device *uvc = video_get_drvdata(vdev);
382 struct uvcg_format *uformat = NULL;
383 struct uvcg_frame *uframe = NULL;
384 struct uvcg_frame_ptr *frame;
385
386 uformat = find_format_by_pix(uvc, fival->pixel_format);
387 if (!uformat)
388 return -EINVAL;
389
390 list_for_each_entry(frame, &uformat->frames, entry) {
391 if (frame->frm->frame.w_width == fival->width &&
392 frame->frm->frame.w_height == fival->height) {
393 uframe = frame->frm;
394 break;
395 }
396 }
397 if (!uframe)
398 return -EINVAL;
399
400 if (fival->index >= uframe->frame.b_frame_interval_type)
401 return -EINVAL;
402
403 fival->discrete.numerator =
404 uframe->dw_frame_interval[fival->index];
405
406 /* TODO: handle V4L2_FRMIVAL_TYPE_STEPWISE */
407 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
408 fival->discrete.denominator = 10000000;
409 v4l2_simplify_fraction(&fival->discrete.numerator,
410 &fival->discrete.denominator, 8, 333);
411
412 return 0;
413}
414
415static int
416uvc_v4l2_enum_framesizes(struct file *file, void *fh,
417 struct v4l2_frmsizeenum *fsize)
418{
419 struct video_device *vdev = video_devdata(file);
420 struct uvc_device *uvc = video_get_drvdata(vdev);
421 struct uvcg_format *uformat = NULL;
422 struct uvcg_frame *uframe = NULL;
423
424 uformat = find_format_by_pix(uvc, fsize->pixel_format);
425 if (!uformat)
426 return -EINVAL;
427
428 if (fsize->index >= uformat->num_frames)
429 return -EINVAL;
430
431 uframe = find_frame_by_index(uvc, uformat, fsize->index + 1);
432 if (!uframe)
433 return -EINVAL;
434
435 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
436 fsize->discrete.width = uframe->frame.w_width;
437 fsize->discrete.height = uframe->frame.w_height;
438
439 return 0;
440}
441
442static int
443uvc_v4l2_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
444{
445 struct video_device *vdev = video_devdata(file);
446 struct uvc_device *uvc = video_get_drvdata(vdev);
447 const struct uvc_format_desc *fmtdesc;
448 struct uvcg_format *uformat;
449
450 if (f->index >= uvc->header->num_fmt)
451 return -EINVAL;
452
453 uformat = find_format_by_index(uvc, f->index + 1);
454 if (!uformat)
455 return -EINVAL;
456
457 fmtdesc = to_uvc_format(uformat);
458 if (IS_ERR(fmtdesc))
459 return PTR_ERR(fmtdesc);
460
461 f->pixelformat = fmtdesc->fcc;
462
463 return 0;
464}
465
466static int
467uvc_v4l2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *b)
468{
469 struct video_device *vdev = video_devdata(file);
470 struct uvc_device *uvc = video_get_drvdata(vdev);
471 struct uvc_video *video = &uvc->video;
472
473 if (b->type != video->queue.queue.type)
474 return -EINVAL;
475
476 return uvcg_alloc_buffers(&video->queue, b);
477}
478
479static int
480uvc_v4l2_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
481{
482 struct video_device *vdev = video_devdata(file);
483 struct uvc_device *uvc = video_get_drvdata(vdev);
484 struct uvc_video *video = &uvc->video;
485
486 return uvcg_query_buffer(&video->queue, b);
487}
488
489static int
490uvc_v4l2_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
491{
492 struct video_device *vdev = video_devdata(file);
493 struct uvc_device *uvc = video_get_drvdata(vdev);
494 struct uvc_video *video = &uvc->video;
495 int ret;
496
497 ret = uvcg_queue_buffer(&video->queue, b);
498 if (ret < 0)
499 return ret;
500
501 if (uvc->state == UVC_STATE_STREAMING)
502 queue_work(video->async_wq, &video->pump);
503
504 return ret;
505}
506
507static int
508uvc_v4l2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
509{
510 struct video_device *vdev = video_devdata(file);
511 struct uvc_device *uvc = video_get_drvdata(vdev);
512 struct uvc_video *video = &uvc->video;
513
514 return uvcg_dequeue_buffer(&video->queue, b, file->f_flags & O_NONBLOCK);
515}
516
517static int
518uvc_v4l2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
519{
520 struct video_device *vdev = video_devdata(file);
521 struct uvc_device *uvc = video_get_drvdata(vdev);
522 struct uvc_video *video = &uvc->video;
523 int ret;
524
525 if (type != video->queue.queue.type)
526 return -EINVAL;
527
528 /* Enable UVC video. */
529 ret = uvcg_video_enable(video);
530 if (ret < 0)
531 return ret;
532
533 /*
534 * Complete the alternate setting selection setup phase now that
535 * userspace is ready to provide video frames.
536 */
537 uvc_function_setup_continue(uvc, 0);
538 uvc->state = UVC_STATE_STREAMING;
539
540 return 0;
541}
542
543static int
544uvc_v4l2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
545{
546 struct video_device *vdev = video_devdata(file);
547 struct uvc_device *uvc = video_get_drvdata(vdev);
548 struct uvc_video *video = &uvc->video;
549 int ret = 0;
550
551 if (type != video->queue.queue.type)
552 return -EINVAL;
553
554 ret = uvcg_video_disable(video);
555 if (ret < 0)
556 return ret;
557
558 if (uvc->state != UVC_STATE_STREAMING)
559 return 0;
560
561 uvc->state = UVC_STATE_CONNECTED;
562 uvc_function_setup_continue(uvc, 1);
563 return 0;
564}
565
566static int
567uvc_v4l2_subscribe_event(struct v4l2_fh *fh,
568 const struct v4l2_event_subscription *sub)
569{
570 struct uvc_device *uvc = video_get_drvdata(fh->vdev);
571 struct uvc_file_handle *handle = to_uvc_file_handle(fh);
572 int ret;
573
574 if (sub->type < UVC_EVENT_FIRST || sub->type > UVC_EVENT_LAST)
575 return -EINVAL;
576
577 if (sub->type == UVC_EVENT_SETUP && uvc->func_connected)
578 return -EBUSY;
579
580 ret = v4l2_event_subscribe(fh, sub, 2, NULL);
581 if (ret < 0)
582 return ret;
583
584 if (sub->type == UVC_EVENT_SETUP) {
585 uvc->func_connected = true;
586 handle->is_uvc_app_handle = true;
587 uvc_function_connect(uvc);
588 }
589
590 return 0;
591}
592
593static void uvc_v4l2_disable(struct uvc_device *uvc)
594{
595 uvc_function_disconnect(uvc);
596 uvcg_video_disable(&uvc->video);
597 uvcg_free_buffers(&uvc->video.queue);
598 uvc->func_connected = false;
599 wake_up_interruptible(&uvc->func_connected_queue);
600}
601
602static int
603uvc_v4l2_unsubscribe_event(struct v4l2_fh *fh,
604 const struct v4l2_event_subscription *sub)
605{
606 struct uvc_device *uvc = video_get_drvdata(fh->vdev);
607 struct uvc_file_handle *handle = to_uvc_file_handle(fh);
608 int ret;
609
610 ret = v4l2_event_unsubscribe(fh, sub);
611 if (ret < 0)
612 return ret;
613
614 if (sub->type == UVC_EVENT_SETUP && handle->is_uvc_app_handle) {
615 uvc_v4l2_disable(uvc);
616 handle->is_uvc_app_handle = false;
617 }
618
619 return 0;
620}
621
622static long
623uvc_v4l2_ioctl_default(struct file *file, void *fh, bool valid_prio,
624 unsigned int cmd, void *arg)
625{
626 struct video_device *vdev = video_devdata(file);
627 struct uvc_device *uvc = video_get_drvdata(vdev);
628
629 switch (cmd) {
630 case UVCIOC_SEND_RESPONSE:
631 return uvc_send_response(uvc, arg);
632
633 default:
634 return -ENOIOCTLCMD;
635 }
636}
637
638const struct v4l2_ioctl_ops uvc_v4l2_ioctl_ops = {
639 .vidioc_querycap = uvc_v4l2_querycap,
640 .vidioc_try_fmt_vid_out = uvc_v4l2_try_format,
641 .vidioc_g_fmt_vid_out = uvc_v4l2_get_format,
642 .vidioc_s_fmt_vid_out = uvc_v4l2_set_format,
643 .vidioc_enum_frameintervals = uvc_v4l2_enum_frameintervals,
644 .vidioc_enum_framesizes = uvc_v4l2_enum_framesizes,
645 .vidioc_enum_fmt_vid_out = uvc_v4l2_enum_format,
646 .vidioc_reqbufs = uvc_v4l2_reqbufs,
647 .vidioc_querybuf = uvc_v4l2_querybuf,
648 .vidioc_qbuf = uvc_v4l2_qbuf,
649 .vidioc_dqbuf = uvc_v4l2_dqbuf,
650 .vidioc_streamon = uvc_v4l2_streamon,
651 .vidioc_streamoff = uvc_v4l2_streamoff,
652 .vidioc_s_parm = uvc_v4l2_s_parm,
653 .vidioc_g_parm = uvc_v4l2_g_parm,
654 .vidioc_subscribe_event = uvc_v4l2_subscribe_event,
655 .vidioc_unsubscribe_event = uvc_v4l2_unsubscribe_event,
656 .vidioc_default = uvc_v4l2_ioctl_default,
657};
658
659/* --------------------------------------------------------------------------
660 * V4L2
661 */
662
663static int
664uvc_v4l2_open(struct file *file)
665{
666 struct video_device *vdev = video_devdata(file);
667 struct uvc_device *uvc = video_get_drvdata(vdev);
668 struct uvc_file_handle *handle;
669
670 handle = kzalloc(sizeof(*handle), GFP_KERNEL);
671 if (handle == NULL)
672 return -ENOMEM;
673
674 v4l2_fh_init(&handle->vfh, vdev);
675 v4l2_fh_add(&handle->vfh);
676
677 handle->device = &uvc->video;
678 file->private_data = &handle->vfh;
679
680 return 0;
681}
682
683static int
684uvc_v4l2_release(struct file *file)
685{
686 struct video_device *vdev = video_devdata(file);
687 struct uvc_device *uvc = video_get_drvdata(vdev);
688 struct uvc_file_handle *handle = to_uvc_file_handle(file->private_data);
689 struct uvc_video *video = handle->device;
690
691 mutex_lock(&video->mutex);
692 if (handle->is_uvc_app_handle)
693 uvc_v4l2_disable(uvc);
694 mutex_unlock(&video->mutex);
695
696 file->private_data = NULL;
697 v4l2_fh_del(&handle->vfh);
698 v4l2_fh_exit(&handle->vfh);
699 kfree(handle);
700
701 return 0;
702}
703
704static int
705uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
706{
707 struct video_device *vdev = video_devdata(file);
708 struct uvc_device *uvc = video_get_drvdata(vdev);
709
710 return uvcg_queue_mmap(&uvc->video.queue, vma);
711}
712
713static __poll_t
714uvc_v4l2_poll(struct file *file, poll_table *wait)
715{
716 struct video_device *vdev = video_devdata(file);
717 struct uvc_device *uvc = video_get_drvdata(vdev);
718
719 return uvcg_queue_poll(&uvc->video.queue, file, wait);
720}
721
722#ifndef CONFIG_MMU
723static unsigned long uvcg_v4l2_get_unmapped_area(struct file *file,
724 unsigned long addr, unsigned long len, unsigned long pgoff,
725 unsigned long flags)
726{
727 struct video_device *vdev = video_devdata(file);
728 struct uvc_device *uvc = video_get_drvdata(vdev);
729
730 return uvcg_queue_get_unmapped_area(&uvc->video.queue, pgoff);
731}
732#endif
733
734const struct v4l2_file_operations uvc_v4l2_fops = {
735 .owner = THIS_MODULE,
736 .open = uvc_v4l2_open,
737 .release = uvc_v4l2_release,
738 .unlocked_ioctl = video_ioctl2,
739 .mmap = uvc_v4l2_mmap,
740 .poll = uvc_v4l2_poll,
741#ifndef CONFIG_MMU
742 .get_unmapped_area = uvcg_v4l2_get_unmapped_area,
743#endif
744};