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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[cris-mirror.git] / drivers / media / usb / uvc / uvc_v4l2.c
bloba13ad4e178be5a289638a89c3023c11569d1d9eb
1 /*
2 * uvc_v4l2.c -- USB Video Class driver - V4L2 API
3 *
4 * Copyright (C) 2005-2010
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.
11 *
12 */
13
14 #include <linux/compat.h>
15 #include <linux/kernel.h>
16 #include <linux/list.h>
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/usb.h>
20 #include <linux/videodev2.h>
21 #include <linux/vmalloc.h>
22 #include <linux/mm.h>
23 #include <linux/wait.h>
24 #include <linux/atomic.h>
25
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-ctrls.h>
28 #include <media/v4l2-event.h>
29 #include <media/v4l2-ioctl.h>
30
31 #include "uvcvideo.h"
32
33 /* ------------------------------------------------------------------------
34 * UVC ioctls
35 */
36 static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
37 struct uvc_xu_control_mapping *xmap)
38 {
39 struct uvc_control_mapping *map;
40 unsigned int size;
41 int ret;
42
43 map = kzalloc(sizeof *map, GFP_KERNEL);
44 if (map == NULL)
45 return -ENOMEM;
46
47 map->id = xmap->id;
48 memcpy(map->name, xmap->name, sizeof map->name);
49 memcpy(map->entity, xmap->entity, sizeof map->entity);
50 map->selector = xmap->selector;
51 map->size = xmap->size;
52 map->offset = xmap->offset;
53 map->v4l2_type = xmap->v4l2_type;
54 map->data_type = xmap->data_type;
55
56 switch (xmap->v4l2_type) {
57 case V4L2_CTRL_TYPE_INTEGER:
58 case V4L2_CTRL_TYPE_BOOLEAN:
59 case V4L2_CTRL_TYPE_BUTTON:
60 break;
61
62 case V4L2_CTRL_TYPE_MENU:
63 /* Prevent excessive memory consumption, as well as integer
64 * overflows.
65 */
66 if (xmap->menu_count == 0 ||
67 xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
68 ret = -EINVAL;
69 goto free_map;
70 }
71
72 size = xmap->menu_count * sizeof(*map->menu_info);
73 map->menu_info = memdup_user(xmap->menu_info, size);
74 if (IS_ERR(map->menu_info)) {
75 ret = PTR_ERR(map->menu_info);
76 goto free_map;
77 }
78
79 map->menu_count = xmap->menu_count;
80 break;
81
82 default:
83 uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type "
84 "%u.\n", xmap->v4l2_type);
85 ret = -ENOTTY;
86 goto free_map;
87 }
88
89 ret = uvc_ctrl_add_mapping(chain, map);
90
91 kfree(map->menu_info);
92 free_map:
93 kfree(map);
94
95 return ret;
96 }
97
98 /* ------------------------------------------------------------------------
99 * V4L2 interface
100 */
101
102 /*
103 * Find the frame interval closest to the requested frame interval for the
104 * given frame format and size. This should be done by the device as part of
105 * the Video Probe and Commit negotiation, but some hardware don't implement
106 * that feature.
107 */
108 static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval)
109 {
110 unsigned int i;
111
112 if (frame->bFrameIntervalType) {
113 __u32 best = -1, dist;
114
115 for (i = 0; i < frame->bFrameIntervalType; ++i) {
116 dist = interval > frame->dwFrameInterval[i]
117 ? interval - frame->dwFrameInterval[i]
118 : frame->dwFrameInterval[i] - interval;
119
120 if (dist > best)
121 break;
122
123 best = dist;
124 }
125
126 interval = frame->dwFrameInterval[i-1];
127 } else {
128 const __u32 min = frame->dwFrameInterval[0];
129 const __u32 max = frame->dwFrameInterval[1];
130 const __u32 step = frame->dwFrameInterval[2];
131
132 interval = min + (interval - min + step/2) / step * step;
133 if (interval > max)
134 interval = max;
135 }
136
137 return interval;
138 }
139
140 static __u32 uvc_v4l2_get_bytesperline(const struct uvc_format *format,
141 const struct uvc_frame *frame)
142 {
143 switch (format->fcc) {
144 case V4L2_PIX_FMT_NV12:
145 case V4L2_PIX_FMT_YVU420:
146 case V4L2_PIX_FMT_YUV420:
147 case V4L2_PIX_FMT_M420:
148 return frame->wWidth;
149
150 default:
151 return format->bpp * frame->wWidth / 8;
152 }
153 }
154
155 static int uvc_v4l2_try_format(struct uvc_streaming *stream,
156 struct v4l2_format *fmt, struct uvc_streaming_control *probe,
157 struct uvc_format **uvc_format, struct uvc_frame **uvc_frame)
158 {
159 struct uvc_format *format = NULL;
160 struct uvc_frame *frame = NULL;
161 __u16 rw, rh;
162 unsigned int d, maxd;
163 unsigned int i;
164 __u32 interval;
165 int ret = 0;
166 __u8 *fcc;
167
168 if (fmt->type != stream->type)
169 return -EINVAL;
170
171 fcc = (__u8 *)&fmt->fmt.pix.pixelformat;
172 uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n",
173 fmt->fmt.pix.pixelformat,
174 fcc[0], fcc[1], fcc[2], fcc[3],
175 fmt->fmt.pix.width, fmt->fmt.pix.height);
176
177 /* Check if the hardware supports the requested format, use the default
178 * format otherwise.
179 */
180 for (i = 0; i < stream->nformats; ++i) {
181 format = &stream->format[i];
182 if (format->fcc == fmt->fmt.pix.pixelformat)
183 break;
184 }
185
186 if (i == stream->nformats) {
187 format = stream->def_format;
188 fmt->fmt.pix.pixelformat = format->fcc;
189 }
190
191 /* Find the closest image size. The distance between image sizes is
192 * the size in pixels of the non-overlapping regions between the
193 * requested size and the frame-specified size.
194 */
195 rw = fmt->fmt.pix.width;
196 rh = fmt->fmt.pix.height;
197 maxd = (unsigned int)-1;
198
199 for (i = 0; i < format->nframes; ++i) {
200 __u16 w = format->frame[i].wWidth;
201 __u16 h = format->frame[i].wHeight;
202
203 d = min(w, rw) * min(h, rh);
204 d = w*h + rw*rh - 2*d;
205 if (d < maxd) {
206 maxd = d;
207 frame = &format->frame[i];
208 }
209
210 if (maxd == 0)
211 break;
212 }
213
214 if (frame == NULL) {
215 uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n",
216 fmt->fmt.pix.width, fmt->fmt.pix.height);
217 return -EINVAL;
218 }
219
220 /* Use the default frame interval. */
221 interval = frame->dwDefaultFrameInterval;
222 uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us "
223 "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval,
224 (100000000/interval)%10);
225
226 /* Set the format index, frame index and frame interval. */
227 memset(probe, 0, sizeof *probe);
228 probe->bmHint = 1; /* dwFrameInterval */
229 probe->bFormatIndex = format->index;
230 probe->bFrameIndex = frame->bFrameIndex;
231 probe->dwFrameInterval = uvc_try_frame_interval(frame, interval);
232 /* Some webcams stall the probe control set request when the
233 * dwMaxVideoFrameSize field is set to zero. The UVC specification
234 * clearly states that the field is read-only from the host, so this
235 * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by
236 * the webcam to work around the problem.
237 *
238 * The workaround could probably be enabled for all webcams, so the
239 * quirk can be removed if needed. It's currently useful to detect
240 * webcam bugs and fix them before they hit the market (providing
241 * developers test their webcams with the Linux driver as well as with
242 * the Windows driver).
243 */
244 mutex_lock(&stream->mutex);
245 if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
246 probe->dwMaxVideoFrameSize =
247 stream->ctrl.dwMaxVideoFrameSize;
248
249 /* Probe the device. */
250 ret = uvc_probe_video(stream, probe);
251 mutex_unlock(&stream->mutex);
252 if (ret < 0)
253 goto done;
254
255 fmt->fmt.pix.width = frame->wWidth;
256 fmt->fmt.pix.height = frame->wHeight;
257 fmt->fmt.pix.field = V4L2_FIELD_NONE;
258 fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
259 fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
260 fmt->fmt.pix.colorspace = format->colorspace;
261 fmt->fmt.pix.priv = 0;
262
263 if (uvc_format != NULL)
264 *uvc_format = format;
265 if (uvc_frame != NULL)
266 *uvc_frame = frame;
267
268 done:
269 return ret;
270 }
271
272 static int uvc_v4l2_get_format(struct uvc_streaming *stream,
273 struct v4l2_format *fmt)
274 {
275 struct uvc_format *format;
276 struct uvc_frame *frame;
277 int ret = 0;
278
279 if (fmt->type != stream->type)
280 return -EINVAL;
281
282 mutex_lock(&stream->mutex);
283 format = stream->cur_format;
284 frame = stream->cur_frame;
285
286 if (format == NULL || frame == NULL) {
287 ret = -EINVAL;
288 goto done;
289 }
290
291 fmt->fmt.pix.pixelformat = format->fcc;
292 fmt->fmt.pix.width = frame->wWidth;
293 fmt->fmt.pix.height = frame->wHeight;
294 fmt->fmt.pix.field = V4L2_FIELD_NONE;
295 fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
296 fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
297 fmt->fmt.pix.colorspace = format->colorspace;
298 fmt->fmt.pix.priv = 0;
299
300 done:
301 mutex_unlock(&stream->mutex);
302 return ret;
303 }
304
305 static int uvc_v4l2_set_format(struct uvc_streaming *stream,
306 struct v4l2_format *fmt)
307 {
308 struct uvc_streaming_control probe;
309 struct uvc_format *format;
310 struct uvc_frame *frame;
311 int ret;
312
313 if (fmt->type != stream->type)
314 return -EINVAL;
315
316 ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
317 if (ret < 0)
318 return ret;
319
320 mutex_lock(&stream->mutex);
321
322 if (uvc_queue_allocated(&stream->queue)) {
323 ret = -EBUSY;
324 goto done;
325 }
326
327 stream->ctrl = probe;
328 stream->cur_format = format;
329 stream->cur_frame = frame;
330
331 done:
332 mutex_unlock(&stream->mutex);
333 return ret;
334 }
335
336 static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
337 struct v4l2_streamparm *parm)
338 {
339 uint32_t numerator, denominator;
340
341 if (parm->type != stream->type)
342 return -EINVAL;
343
344 mutex_lock(&stream->mutex);
345 numerator = stream->ctrl.dwFrameInterval;
346 mutex_unlock(&stream->mutex);
347
348 denominator = 10000000;
349 uvc_simplify_fraction(&numerator, &denominator, 8, 333);
350
351 memset(parm, 0, sizeof *parm);
352 parm->type = stream->type;
353
354 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
355 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
356 parm->parm.capture.capturemode = 0;
357 parm->parm.capture.timeperframe.numerator = numerator;
358 parm->parm.capture.timeperframe.denominator = denominator;
359 parm->parm.capture.extendedmode = 0;
360 parm->parm.capture.readbuffers = 0;
361 } else {
362 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
363 parm->parm.output.outputmode = 0;
364 parm->parm.output.timeperframe.numerator = numerator;
365 parm->parm.output.timeperframe.denominator = denominator;
366 }
367
368 return 0;
369 }
370
371 static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
372 struct v4l2_streamparm *parm)
373 {
374 struct uvc_streaming_control probe;
375 struct v4l2_fract timeperframe;
376 uint32_t interval;
377 int ret;
378
379 if (parm->type != stream->type)
380 return -EINVAL;
381
382 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
383 timeperframe = parm->parm.capture.timeperframe;
384 else
385 timeperframe = parm->parm.output.timeperframe;
386
387 interval = uvc_fraction_to_interval(timeperframe.numerator,
388 timeperframe.denominator);
389 uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
390 timeperframe.numerator, timeperframe.denominator, interval);
391
392 mutex_lock(&stream->mutex);
393
394 if (uvc_queue_streaming(&stream->queue)) {
395 mutex_unlock(&stream->mutex);
396 return -EBUSY;
397 }
398
399 probe = stream->ctrl;
400 probe.dwFrameInterval =
401 uvc_try_frame_interval(stream->cur_frame, interval);
402
403 /* Probe the device with the new settings. */
404 ret = uvc_probe_video(stream, &probe);
405 if (ret < 0) {
406 mutex_unlock(&stream->mutex);
407 return ret;
408 }
409
410 stream->ctrl = probe;
411 mutex_unlock(&stream->mutex);
412
413 /* Return the actual frame period. */
414 timeperframe.numerator = probe.dwFrameInterval;
415 timeperframe.denominator = 10000000;
416 uvc_simplify_fraction(&timeperframe.numerator,
417 &timeperframe.denominator, 8, 333);
418
419 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
420 parm->parm.capture.timeperframe = timeperframe;
421 else
422 parm->parm.output.timeperframe = timeperframe;
423
424 return 0;
425 }
426
427 /* ------------------------------------------------------------------------
428 * Privilege management
429 */
430
431 /*
432 * Privilege management is the multiple-open implementation basis. The current
433 * implementation is completely transparent for the end-user and doesn't
434 * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
435 * Those ioctls enable finer control on the device (by making possible for a
436 * user to request exclusive access to a device), but are not mature yet.
437 * Switching to the V4L2 priority mechanism might be considered in the future
438 * if this situation changes.
439 *
440 * Each open instance of a UVC device can either be in a privileged or
441 * unprivileged state. Only a single instance can be in a privileged state at
442 * a given time. Trying to perform an operation that requires privileges will
443 * automatically acquire the required privileges if possible, or return -EBUSY
444 * otherwise. Privileges are dismissed when closing the instance or when
445 * freeing the video buffers using VIDIOC_REQBUFS.
446 *
447 * Operations that require privileges are:
448 *
449 * - VIDIOC_S_INPUT
450 * - VIDIOC_S_PARM
451 * - VIDIOC_S_FMT
452 * - VIDIOC_REQBUFS
453 */
454 static int uvc_acquire_privileges(struct uvc_fh *handle)
455 {
456 /* Always succeed if the handle is already privileged. */
457 if (handle->state == UVC_HANDLE_ACTIVE)
458 return 0;
459
460 /* Check if the device already has a privileged handle. */
461 if (atomic_inc_return(&handle->stream->active) != 1) {
462 atomic_dec(&handle->stream->active);
463 return -EBUSY;
464 }
465
466 handle->state = UVC_HANDLE_ACTIVE;
467 return 0;
468 }
469
470 static void uvc_dismiss_privileges(struct uvc_fh *handle)
471 {
472 if (handle->state == UVC_HANDLE_ACTIVE)
473 atomic_dec(&handle->stream->active);
474
475 handle->state = UVC_HANDLE_PASSIVE;
476 }
477
478 static int uvc_has_privileges(struct uvc_fh *handle)
479 {
480 return handle->state == UVC_HANDLE_ACTIVE;
481 }
482
483 /* ------------------------------------------------------------------------
484 * V4L2 file operations
485 */
486
487 static int uvc_v4l2_open(struct file *file)
488 {
489 struct uvc_streaming *stream;
490 struct uvc_fh *handle;
491 int ret = 0;
492
493 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
494 stream = video_drvdata(file);
495
496 ret = usb_autopm_get_interface(stream->dev->intf);
497 if (ret < 0)
498 return ret;
499
500 /* Create the device handle. */
501 handle = kzalloc(sizeof *handle, GFP_KERNEL);
502 if (handle == NULL) {
503 usb_autopm_put_interface(stream->dev->intf);
504 return -ENOMEM;
505 }
506
507 mutex_lock(&stream->dev->lock);
508 if (stream->dev->users == 0) {
509 ret = uvc_status_start(stream->dev, GFP_KERNEL);
510 if (ret < 0) {
511 mutex_unlock(&stream->dev->lock);
512 usb_autopm_put_interface(stream->dev->intf);
513 kfree(handle);
514 return ret;
515 }
516 }
517
518 stream->dev->users++;
519 mutex_unlock(&stream->dev->lock);
520
521 v4l2_fh_init(&handle->vfh, &stream->vdev);
522 v4l2_fh_add(&handle->vfh);
523 handle->chain = stream->chain;
524 handle->stream = stream;
525 handle->state = UVC_HANDLE_PASSIVE;
526 file->private_data = handle;
527
528 return 0;
529 }
530
531 static int uvc_v4l2_release(struct file *file)
532 {
533 struct uvc_fh *handle = file->private_data;
534 struct uvc_streaming *stream = handle->stream;
535
536 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n");
537
538 /* Only free resources if this is a privileged handle. */
539 if (uvc_has_privileges(handle))
540 uvc_queue_release(&stream->queue);
541
542 /* Release the file handle. */
543 uvc_dismiss_privileges(handle);
544 v4l2_fh_del(&handle->vfh);
545 v4l2_fh_exit(&handle->vfh);
546 kfree(handle);
547 file->private_data = NULL;
548
549 mutex_lock(&stream->dev->lock);
550 if (--stream->dev->users == 0)
551 uvc_status_stop(stream->dev);
552 mutex_unlock(&stream->dev->lock);
553
554 usb_autopm_put_interface(stream->dev->intf);
555 return 0;
556 }
557
558 static int uvc_ioctl_querycap(struct file *file, void *fh,
559 struct v4l2_capability *cap)
560 {
561 struct video_device *vdev = video_devdata(file);
562 struct uvc_fh *handle = file->private_data;
563 struct uvc_video_chain *chain = handle->chain;
564 struct uvc_streaming *stream = handle->stream;
565
566 strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver));
567 strlcpy(cap->card, vdev->name, sizeof(cap->card));
568 usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info));
569 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
570 | chain->caps;
571
572 return 0;
573 }
574
575 static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
576 struct v4l2_fmtdesc *fmt)
577 {
578 struct uvc_format *format;
579 enum v4l2_buf_type type = fmt->type;
580 __u32 index = fmt->index;
581
582 if (fmt->type != stream->type || fmt->index >= stream->nformats)
583 return -EINVAL;
584
585 memset(fmt, 0, sizeof(*fmt));
586 fmt->index = index;
587 fmt->type = type;
588
589 format = &stream->format[fmt->index];
590 fmt->flags = 0;
591 if (format->flags & UVC_FMT_FLAG_COMPRESSED)
592 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
593 strlcpy(fmt->description, format->name, sizeof(fmt->description));
594 fmt->description[sizeof(fmt->description) - 1] = 0;
595 fmt->pixelformat = format->fcc;
596 return 0;
597 }
598
599 static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh,
600 struct v4l2_fmtdesc *fmt)
601 {
602 struct uvc_fh *handle = fh;
603 struct uvc_streaming *stream = handle->stream;
604
605 return uvc_ioctl_enum_fmt(stream, fmt);
606 }
607
608 static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh,
609 struct v4l2_fmtdesc *fmt)
610 {
611 struct uvc_fh *handle = fh;
612 struct uvc_streaming *stream = handle->stream;
613
614 return uvc_ioctl_enum_fmt(stream, fmt);
615 }
616
617 static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh,
618 struct v4l2_format *fmt)
619 {
620 struct uvc_fh *handle = fh;
621 struct uvc_streaming *stream = handle->stream;
622
623 return uvc_v4l2_get_format(stream, fmt);
624 }
625
626 static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh,
627 struct v4l2_format *fmt)
628 {
629 struct uvc_fh *handle = fh;
630 struct uvc_streaming *stream = handle->stream;
631
632 return uvc_v4l2_get_format(stream, fmt);
633 }
634
635 static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
636 struct v4l2_format *fmt)
637 {
638 struct uvc_fh *handle = fh;
639 struct uvc_streaming *stream = handle->stream;
640 int ret;
641
642 ret = uvc_acquire_privileges(handle);
643 if (ret < 0)
644 return ret;
645
646 return uvc_v4l2_set_format(stream, fmt);
647 }
648
649 static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
650 struct v4l2_format *fmt)
651 {
652 struct uvc_fh *handle = fh;
653 struct uvc_streaming *stream = handle->stream;
654 int ret;
655
656 ret = uvc_acquire_privileges(handle);
657 if (ret < 0)
658 return ret;
659
660 return uvc_v4l2_set_format(stream, fmt);
661 }
662
663 static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh,
664 struct v4l2_format *fmt)
665 {
666 struct uvc_fh *handle = fh;
667 struct uvc_streaming *stream = handle->stream;
668 struct uvc_streaming_control probe;
669
670 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
671 }
672
673 static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
674 struct v4l2_format *fmt)
675 {
676 struct uvc_fh *handle = fh;
677 struct uvc_streaming *stream = handle->stream;
678 struct uvc_streaming_control probe;
679
680 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
681 }
682
683 static int uvc_ioctl_reqbufs(struct file *file, void *fh,
684 struct v4l2_requestbuffers *rb)
685 {
686 struct uvc_fh *handle = fh;
687 struct uvc_streaming *stream = handle->stream;
688 int ret;
689
690 ret = uvc_acquire_privileges(handle);
691 if (ret < 0)
692 return ret;
693
694 mutex_lock(&stream->mutex);
695 ret = uvc_request_buffers(&stream->queue, rb);
696 mutex_unlock(&stream->mutex);
697 if (ret < 0)
698 return ret;
699
700 if (ret == 0)
701 uvc_dismiss_privileges(handle);
702
703 return 0;
704 }
705
706 static int uvc_ioctl_querybuf(struct file *file, void *fh,
707 struct v4l2_buffer *buf)
708 {
709 struct uvc_fh *handle = fh;
710 struct uvc_streaming *stream = handle->stream;
711
712 if (!uvc_has_privileges(handle))
713 return -EBUSY;
714
715 return uvc_query_buffer(&stream->queue, buf);
716 }
717
718 static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
719 {
720 struct uvc_fh *handle = fh;
721 struct uvc_streaming *stream = handle->stream;
722
723 if (!uvc_has_privileges(handle))
724 return -EBUSY;
725
726 return uvc_queue_buffer(&stream->queue, buf);
727 }
728
729 static int uvc_ioctl_expbuf(struct file *file, void *fh,
730 struct v4l2_exportbuffer *exp)
731 {
732 struct uvc_fh *handle = fh;
733 struct uvc_streaming *stream = handle->stream;
734
735 if (!uvc_has_privileges(handle))
736 return -EBUSY;
737
738 return uvc_export_buffer(&stream->queue, exp);
739 }
740
741 static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
742 {
743 struct uvc_fh *handle = fh;
744 struct uvc_streaming *stream = handle->stream;
745
746 if (!uvc_has_privileges(handle))
747 return -EBUSY;
748
749 return uvc_dequeue_buffer(&stream->queue, buf,
750 file->f_flags & O_NONBLOCK);
751 }
752
753 static int uvc_ioctl_create_bufs(struct file *file, void *fh,
754 struct v4l2_create_buffers *cb)
755 {
756 struct uvc_fh *handle = fh;
757 struct uvc_streaming *stream = handle->stream;
758 int ret;
759
760 ret = uvc_acquire_privileges(handle);
761 if (ret < 0)
762 return ret;
763
764 return uvc_create_buffers(&stream->queue, cb);
765 }
766
767 static int uvc_ioctl_streamon(struct file *file, void *fh,
768 enum v4l2_buf_type type)
769 {
770 struct uvc_fh *handle = fh;
771 struct uvc_streaming *stream = handle->stream;
772 int ret;
773
774 if (!uvc_has_privileges(handle))
775 return -EBUSY;
776
777 mutex_lock(&stream->mutex);
778 ret = uvc_queue_streamon(&stream->queue, type);
779 mutex_unlock(&stream->mutex);
780
781 return ret;
782 }
783
784 static int uvc_ioctl_streamoff(struct file *file, void *fh,
785 enum v4l2_buf_type type)
786 {
787 struct uvc_fh *handle = fh;
788 struct uvc_streaming *stream = handle->stream;
789
790 if (!uvc_has_privileges(handle))
791 return -EBUSY;
792
793 mutex_lock(&stream->mutex);
794 uvc_queue_streamoff(&stream->queue, type);
795 mutex_unlock(&stream->mutex);
796
797 return 0;
798 }
799
800 static int uvc_ioctl_enum_input(struct file *file, void *fh,
801 struct v4l2_input *input)
802 {
803 struct uvc_fh *handle = fh;
804 struct uvc_video_chain *chain = handle->chain;
805 const struct uvc_entity *selector = chain->selector;
806 struct uvc_entity *iterm = NULL;
807 u32 index = input->index;
808 int pin = 0;
809
810 if (selector == NULL ||
811 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
812 if (index != 0)
813 return -EINVAL;
814 list_for_each_entry(iterm, &chain->entities, chain) {
815 if (UVC_ENTITY_IS_ITERM(iterm))
816 break;
817 }
818 pin = iterm->id;
819 } else if (index < selector->bNrInPins) {
820 pin = selector->baSourceID[index];
821 list_for_each_entry(iterm, &chain->entities, chain) {
822 if (!UVC_ENTITY_IS_ITERM(iterm))
823 continue;
824 if (iterm->id == pin)
825 break;
826 }
827 }
828
829 if (iterm == NULL || iterm->id != pin)
830 return -EINVAL;
831
832 memset(input, 0, sizeof(*input));
833 input->index = index;
834 strlcpy(input->name, iterm->name, sizeof(input->name));
835 if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA)
836 input->type = V4L2_INPUT_TYPE_CAMERA;
837
838 return 0;
839 }
840
841 static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input)
842 {
843 struct uvc_fh *handle = fh;
844 struct uvc_video_chain *chain = handle->chain;
845 int ret;
846 u8 i;
847
848 if (chain->selector == NULL ||
849 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
850 *input = 0;
851 return 0;
852 }
853
854 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id,
855 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
856 &i, 1);
857 if (ret < 0)
858 return ret;
859
860 *input = i - 1;
861 return 0;
862 }
863
864 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
865 {
866 struct uvc_fh *handle = fh;
867 struct uvc_video_chain *chain = handle->chain;
868 int ret;
869 u32 i;
870
871 ret = uvc_acquire_privileges(handle);
872 if (ret < 0)
873 return ret;
874
875 if (chain->selector == NULL ||
876 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
877 if (input)
878 return -EINVAL;
879 return 0;
880 }
881
882 if (input >= chain->selector->bNrInPins)
883 return -EINVAL;
884
885 i = input + 1;
886 return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id,
887 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
888 &i, 1);
889 }
890
891 static int uvc_ioctl_queryctrl(struct file *file, void *fh,
892 struct v4l2_queryctrl *qc)
893 {
894 struct uvc_fh *handle = fh;
895 struct uvc_video_chain *chain = handle->chain;
896
897 return uvc_query_v4l2_ctrl(chain, qc);
898 }
899
900 static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
901 struct v4l2_query_ext_ctrl *qec)
902 {
903 struct uvc_fh *handle = fh;
904 struct uvc_video_chain *chain = handle->chain;
905 struct v4l2_queryctrl qc = { qec->id };
906 int ret;
907
908 ret = uvc_query_v4l2_ctrl(chain, &qc);
909 if (ret)
910 return ret;
911
912 qec->id = qc.id;
913 qec->type = qc.type;
914 strlcpy(qec->name, qc.name, sizeof(qec->name));
915 qec->minimum = qc.minimum;
916 qec->maximum = qc.maximum;
917 qec->step = qc.step;
918 qec->default_value = qc.default_value;
919 qec->flags = qc.flags;
920 qec->elem_size = 4;
921 qec->elems = 1;
922 qec->nr_of_dims = 0;
923 memset(qec->dims, 0, sizeof(qec->dims));
924 memset(qec->reserved, 0, sizeof(qec->reserved));
925
926 return 0;
927 }
928
929 static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
930 struct v4l2_control *ctrl)
931 {
932 struct uvc_fh *handle = fh;
933 struct uvc_video_chain *chain = handle->chain;
934 struct v4l2_ext_control xctrl;
935 int ret;
936
937 memset(&xctrl, 0, sizeof(xctrl));
938 xctrl.id = ctrl->id;
939
940 ret = uvc_ctrl_begin(chain);
941 if (ret < 0)
942 return ret;
943
944 ret = uvc_ctrl_get(chain, &xctrl);
945 uvc_ctrl_rollback(handle);
946 if (ret < 0)
947 return ret;
948
949 ctrl->value = xctrl.value;
950 return 0;
951 }
952
953 static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
954 struct v4l2_control *ctrl)
955 {
956 struct uvc_fh *handle = fh;
957 struct uvc_video_chain *chain = handle->chain;
958 struct v4l2_ext_control xctrl;
959 int ret;
960
961 memset(&xctrl, 0, sizeof(xctrl));
962 xctrl.id = ctrl->id;
963 xctrl.value = ctrl->value;
964
965 ret = uvc_ctrl_begin(chain);
966 if (ret < 0)
967 return ret;
968
969 ret = uvc_ctrl_set(chain, &xctrl);
970 if (ret < 0) {
971 uvc_ctrl_rollback(handle);
972 return ret;
973 }
974
975 ret = uvc_ctrl_commit(handle, &xctrl, 1);
976 if (ret < 0)
977 return ret;
978
979 ctrl->value = xctrl.value;
980 return 0;
981 }
982
983 static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
984 struct v4l2_ext_controls *ctrls)
985 {
986 struct uvc_fh *handle = fh;
987 struct uvc_video_chain *chain = handle->chain;
988 struct v4l2_ext_control *ctrl = ctrls->controls;
989 unsigned int i;
990 int ret;
991
992 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
993 for (i = 0; i < ctrls->count; ++ctrl, ++i) {
994 struct v4l2_queryctrl qc = { .id = ctrl->id };
995
996 ret = uvc_query_v4l2_ctrl(chain, &qc);
997 if (ret < 0) {
998 ctrls->error_idx = i;
999 return ret;
1000 }
1001
1002 ctrl->value = qc.default_value;
1003 }
1004
1005 return 0;
1006 }
1007
1008 ret = uvc_ctrl_begin(chain);
1009 if (ret < 0)
1010 return ret;
1011
1012 for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1013 ret = uvc_ctrl_get(chain, ctrl);
1014 if (ret < 0) {
1015 uvc_ctrl_rollback(handle);
1016 ctrls->error_idx = i;
1017 return ret;
1018 }
1019 }
1020
1021 ctrls->error_idx = 0;
1022
1023 return uvc_ctrl_rollback(handle);
1024 }
1025
1026 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
1027 struct v4l2_ext_controls *ctrls,
1028 bool commit)
1029 {
1030 struct v4l2_ext_control *ctrl = ctrls->controls;
1031 struct uvc_video_chain *chain = handle->chain;
1032 unsigned int i;
1033 int ret;
1034
1035 /* Default value cannot be changed */
1036 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL)
1037 return -EINVAL;
1038
1039 ret = uvc_ctrl_begin(chain);
1040 if (ret < 0)
1041 return ret;
1042
1043 for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1044 ret = uvc_ctrl_set(chain, ctrl);
1045 if (ret < 0) {
1046 uvc_ctrl_rollback(handle);
1047 ctrls->error_idx = commit ? ctrls->count : i;
1048 return ret;
1049 }
1050 }
1051
1052 ctrls->error_idx = 0;
1053
1054 if (commit)
1055 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
1056 else
1057 return uvc_ctrl_rollback(handle);
1058 }
1059
1060 static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh,
1061 struct v4l2_ext_controls *ctrls)
1062 {
1063 struct uvc_fh *handle = fh;
1064
1065 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);
1066 }
1067
1068 static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
1069 struct v4l2_ext_controls *ctrls)
1070 {
1071 struct uvc_fh *handle = fh;
1072
1073 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
1074 }
1075
1076 static int uvc_ioctl_querymenu(struct file *file, void *fh,
1077 struct v4l2_querymenu *qm)
1078 {
1079 struct uvc_fh *handle = fh;
1080 struct uvc_video_chain *chain = handle->chain;
1081
1082 return uvc_query_v4l2_menu(chain, qm);
1083 }
1084
1085 static int uvc_ioctl_g_selection(struct file *file, void *fh,
1086 struct v4l2_selection *sel)
1087 {
1088 struct uvc_fh *handle = fh;
1089 struct uvc_streaming *stream = handle->stream;
1090
1091 if (sel->type != stream->type)
1092 return -EINVAL;
1093
1094 switch (sel->target) {
1095 case V4L2_SEL_TGT_CROP_DEFAULT:
1096 case V4L2_SEL_TGT_CROP_BOUNDS:
1097 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1098 return -EINVAL;
1099 break;
1100 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1101 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1102 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1103 return -EINVAL;
1104 break;
1105 default:
1106 return -EINVAL;
1107 }
1108
1109 sel->r.left = 0;
1110 sel->r.top = 0;
1111 mutex_lock(&stream->mutex);
1112 sel->r.width = stream->cur_frame->wWidth;
1113 sel->r.height = stream->cur_frame->wHeight;
1114 mutex_unlock(&stream->mutex);
1115
1116 return 0;
1117 }
1118
1119 static int uvc_ioctl_g_parm(struct file *file, void *fh,
1120 struct v4l2_streamparm *parm)
1121 {
1122 struct uvc_fh *handle = fh;
1123 struct uvc_streaming *stream = handle->stream;
1124
1125 return uvc_v4l2_get_streamparm(stream, parm);
1126 }
1127
1128 static int uvc_ioctl_s_parm(struct file *file, void *fh,
1129 struct v4l2_streamparm *parm)
1130 {
1131 struct uvc_fh *handle = fh;
1132 struct uvc_streaming *stream = handle->stream;
1133 int ret;
1134
1135 ret = uvc_acquire_privileges(handle);
1136 if (ret < 0)
1137 return ret;
1138
1139 return uvc_v4l2_set_streamparm(stream, parm);
1140 }
1141
1142 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh,
1143 struct v4l2_frmsizeenum *fsize)
1144 {
1145 struct uvc_fh *handle = fh;
1146 struct uvc_streaming *stream = handle->stream;
1147 struct uvc_format *format = NULL;
1148 struct uvc_frame *frame;
1149 int i;
1150
1151 /* Look for the given pixel format */
1152 for (i = 0; i < stream->nformats; i++) {
1153 if (stream->format[i].fcc == fsize->pixel_format) {
1154 format = &stream->format[i];
1155 break;
1156 }
1157 }
1158 if (format == NULL)
1159 return -EINVAL;
1160
1161 if (fsize->index >= format->nframes)
1162 return -EINVAL;
1163
1164 frame = &format->frame[fsize->index];
1165 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1166 fsize->discrete.width = frame->wWidth;
1167 fsize->discrete.height = frame->wHeight;
1168 return 0;
1169 }
1170
1171 static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh,
1172 struct v4l2_frmivalenum *fival)
1173 {
1174 struct uvc_fh *handle = fh;
1175 struct uvc_streaming *stream = handle->stream;
1176 struct uvc_format *format = NULL;
1177 struct uvc_frame *frame = NULL;
1178 int i;
1179
1180 /* Look for the given pixel format and frame size */
1181 for (i = 0; i < stream->nformats; i++) {
1182 if (stream->format[i].fcc == fival->pixel_format) {
1183 format = &stream->format[i];
1184 break;
1185 }
1186 }
1187 if (format == NULL)
1188 return -EINVAL;
1189
1190 for (i = 0; i < format->nframes; i++) {
1191 if (format->frame[i].wWidth == fival->width &&
1192 format->frame[i].wHeight == fival->height) {
1193 frame = &format->frame[i];
1194 break;
1195 }
1196 }
1197 if (frame == NULL)
1198 return -EINVAL;
1199
1200 if (frame->bFrameIntervalType) {
1201 if (fival->index >= frame->bFrameIntervalType)
1202 return -EINVAL;
1203
1204 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1205 fival->discrete.numerator =
1206 frame->dwFrameInterval[fival->index];
1207 fival->discrete.denominator = 10000000;
1208 uvc_simplify_fraction(&fival->discrete.numerator,
1209 &fival->discrete.denominator, 8, 333);
1210 } else {
1211 if (fival->index)
1212 return -EINVAL;
1213
1214 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
1215 fival->stepwise.min.numerator = frame->dwFrameInterval[0];
1216 fival->stepwise.min.denominator = 10000000;
1217 fival->stepwise.max.numerator = frame->dwFrameInterval[1];
1218 fival->stepwise.max.denominator = 10000000;
1219 fival->stepwise.step.numerator = frame->dwFrameInterval[2];
1220 fival->stepwise.step.denominator = 10000000;
1221 uvc_simplify_fraction(&fival->stepwise.min.numerator,
1222 &fival->stepwise.min.denominator, 8, 333);
1223 uvc_simplify_fraction(&fival->stepwise.max.numerator,
1224 &fival->stepwise.max.denominator, 8, 333);
1225 uvc_simplify_fraction(&fival->stepwise.step.numerator,
1226 &fival->stepwise.step.denominator, 8, 333);
1227 }
1228
1229 return 0;
1230 }
1231
1232 static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh,
1233 const struct v4l2_event_subscription *sub)
1234 {
1235 switch (sub->type) {
1236 case V4L2_EVENT_CTRL:
1237 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops);
1238 default:
1239 return -EINVAL;
1240 }
1241 }
1242
1243 static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio,
1244 unsigned int cmd, void *arg)
1245 {
1246 struct uvc_fh *handle = fh;
1247 struct uvc_video_chain *chain = handle->chain;
1248
1249 switch (cmd) {
1250 /* Dynamic controls. */
1251 case UVCIOC_CTRL_MAP:
1252 return uvc_ioctl_ctrl_map(chain, arg);
1253
1254 case UVCIOC_CTRL_QUERY:
1255 return uvc_xu_ctrl_query(chain, arg);
1256
1257 default:
1258 return -ENOTTY;
1259 }
1260 }
1261
1262 #ifdef CONFIG_COMPAT
1263 struct uvc_xu_control_mapping32 {
1264 __u32 id;
1265 __u8 name[32];
1266 __u8 entity[16];
1267 __u8 selector;
1268
1269 __u8 size;
1270 __u8 offset;
1271 __u32 v4l2_type;
1272 __u32 data_type;
1273
1274 compat_caddr_t menu_info;
1275 __u32 menu_count;
1276
1277 __u32 reserved[4];
1278 };
1279
1280 static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp,
1281 const struct uvc_xu_control_mapping32 __user *up)
1282 {
1283 struct uvc_xu_control_mapping32 *p = (void *)kp;
1284 compat_caddr_t info;
1285 u32 count;
1286
1287 if (copy_from_user(p, up, sizeof(*p)))
1288 return -EFAULT;
1289
1290 count = p->menu_count;
1291 info = p->menu_info;
1292
1293 memset(kp->reserved, 0, sizeof(kp->reserved));
1294 kp->menu_info = count ? compat_ptr(info) : NULL;
1295 kp->menu_count = count;
1296 return 0;
1297 }
1298
1299 static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
1300 struct uvc_xu_control_mapping32 __user *up)
1301 {
1302 if (copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) ||
1303 put_user(kp->menu_count, &up->menu_count))
1304 return -EFAULT;
1305
1306 if (clear_user(up->reserved, sizeof(up->reserved)))
1307 return -EFAULT;
1308
1309 return 0;
1310 }
1311
1312 struct uvc_xu_control_query32 {
1313 __u8 unit;
1314 __u8 selector;
1315 __u8 query;
1316 __u16 size;
1317 compat_caddr_t data;
1318 };
1319
1320 static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp,
1321 const struct uvc_xu_control_query32 __user *up)
1322 {
1323 struct uvc_xu_control_query32 v;
1324
1325 if (copy_from_user(&v, up, sizeof(v)))
1326 return -EFAULT;
1327
1328 *kp = (struct uvc_xu_control_query){
1329 .unit = v.unit,
1330 .selector = v.selector,
1331 .query = v.query,
1332 .size = v.size,
1333 .data = v.size ? compat_ptr(v.data) : NULL
1334 };
1335 return 0;
1336 }
1337
1338 static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
1339 struct uvc_xu_control_query32 __user *up)
1340 {
1341 if (copy_to_user(up, kp, offsetof(typeof(*up), data)))
1342 return -EFAULT;
1343 return 0;
1344 }
1345
1346 #define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32)
1347 #define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32)
1348
1349 static long uvc_v4l2_compat_ioctl32(struct file *file,
1350 unsigned int cmd, unsigned long arg)
1351 {
1352 struct uvc_fh *handle = file->private_data;
1353 union {
1354 struct uvc_xu_control_mapping xmap;
1355 struct uvc_xu_control_query xqry;
1356 } karg;
1357 void __user *up = compat_ptr(arg);
1358 long ret;
1359
1360 switch (cmd) {
1361 case UVCIOC_CTRL_MAP32:
1362 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
1363 if (ret)
1364 return ret;
1365 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);
1366 if (ret)
1367 return ret;
1368 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
1369 if (ret)
1370 return ret;
1371
1372 break;
1373
1374 case UVCIOC_CTRL_QUERY32:
1375 ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
1376 if (ret)
1377 return ret;
1378 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry);
1379 if (ret)
1380 return ret;
1381 ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
1382 if (ret)
1383 return ret;
1384 break;
1385
1386 default:
1387 return -ENOIOCTLCMD;
1388 }
1389
1390 return ret;
1391 }
1392 #endif
1393
1394 static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
1395 size_t count, loff_t *ppos)
1396 {
1397 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n");
1398 return -EINVAL;
1399 }
1400
1401 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1402 {
1403 struct uvc_fh *handle = file->private_data;
1404 struct uvc_streaming *stream = handle->stream;
1405
1406 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n");
1407
1408 return uvc_queue_mmap(&stream->queue, vma);
1409 }
1410
1411 static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait)
1412 {
1413 struct uvc_fh *handle = file->private_data;
1414 struct uvc_streaming *stream = handle->stream;
1415
1416 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n");
1417
1418 return uvc_queue_poll(&stream->queue, file, wait);
1419 }
1420
1421 #ifndef CONFIG_MMU
1422 static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
1423 unsigned long addr, unsigned long len, unsigned long pgoff,
1424 unsigned long flags)
1425 {
1426 struct uvc_fh *handle = file->private_data;
1427 struct uvc_streaming *stream = handle->stream;
1428
1429 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n");
1430
1431 return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
1432 }
1433 #endif
1434
1435 const struct v4l2_ioctl_ops uvc_ioctl_ops = {
1436 .vidioc_querycap = uvc_ioctl_querycap,
1437 .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
1438 .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out,
1439 .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap,
1440 .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out,
1441 .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap,
1442 .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
1443 .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
1444 .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
1445 .vidioc_reqbufs = uvc_ioctl_reqbufs,
1446 .vidioc_querybuf = uvc_ioctl_querybuf,
1447 .vidioc_qbuf = uvc_ioctl_qbuf,
1448 .vidioc_expbuf = uvc_ioctl_expbuf,
1449 .vidioc_dqbuf = uvc_ioctl_dqbuf,
1450 .vidioc_create_bufs = uvc_ioctl_create_bufs,
1451 .vidioc_streamon = uvc_ioctl_streamon,
1452 .vidioc_streamoff = uvc_ioctl_streamoff,
1453 .vidioc_enum_input = uvc_ioctl_enum_input,
1454 .vidioc_g_input = uvc_ioctl_g_input,
1455 .vidioc_s_input = uvc_ioctl_s_input,
1456 .vidioc_queryctrl = uvc_ioctl_queryctrl,
1457 .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl,
1458 .vidioc_g_ctrl = uvc_ioctl_g_ctrl,
1459 .vidioc_s_ctrl = uvc_ioctl_s_ctrl,
1460 .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls,
1461 .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls,
1462 .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls,
1463 .vidioc_querymenu = uvc_ioctl_querymenu,
1464 .vidioc_g_selection = uvc_ioctl_g_selection,
1465 .vidioc_g_parm = uvc_ioctl_g_parm,
1466 .vidioc_s_parm = uvc_ioctl_s_parm,
1467 .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes,
1468 .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals,
1469 .vidioc_subscribe_event = uvc_ioctl_subscribe_event,
1470 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1471 .vidioc_default = uvc_ioctl_default,
1472 };
1473
1474 const struct v4l2_file_operations uvc_fops = {
1475 .owner = THIS_MODULE,
1476 .open = uvc_v4l2_open,
1477 .release = uvc_v4l2_release,
1478 .unlocked_ioctl = video_ioctl2,
1479 #ifdef CONFIG_COMPAT
1480 .compat_ioctl32 = uvc_v4l2_compat_ioctl32,
1481 #endif
1482 .read = uvc_v4l2_read,
1483 .mmap = uvc_v4l2_mmap,
1484 .poll = uvc_v4l2_poll,
1485 #ifndef CONFIG_MMU
1486 .get_unmapped_area = uvc_v4l2_get_unmapped_area,
1487 #endif
1488 };
1489
CRIS linux kernel tree