diff options
Diffstat (limited to 'drivers/media/video/uvc/uvc_v4l2.c')
-rw-r--r-- | drivers/media/video/uvc/uvc_v4l2.c | 1143 |
1 files changed, 1143 insertions, 0 deletions
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c new file mode 100644 index 00000000000..ea71d5f1f6d --- /dev/null +++ b/drivers/media/video/uvc/uvc_v4l2.c | |||
@@ -0,0 +1,1143 @@ | |||
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/kernel.h> | ||
15 | #include <linux/version.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-ioctl.h> | ||
28 | |||
29 | #include "uvcvideo.h" | ||
30 | |||
31 | /* ------------------------------------------------------------------------ | ||
32 | * UVC ioctls | ||
33 | */ | ||
34 | static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, | ||
35 | struct uvc_xu_control_mapping *xmap, int old) | ||
36 | { | ||
37 | struct uvc_control_mapping *map; | ||
38 | unsigned int size; | ||
39 | int ret; | ||
40 | |||
41 | map = kzalloc(sizeof *map, GFP_KERNEL); | ||
42 | if (map == NULL) | ||
43 | return -ENOMEM; | ||
44 | |||
45 | map->id = xmap->id; | ||
46 | memcpy(map->name, xmap->name, sizeof map->name); | ||
47 | memcpy(map->entity, xmap->entity, sizeof map->entity); | ||
48 | map->selector = xmap->selector; | ||
49 | map->size = xmap->size; | ||
50 | map->offset = xmap->offset; | ||
51 | map->v4l2_type = xmap->v4l2_type; | ||
52 | map->data_type = xmap->data_type; | ||
53 | |||
54 | switch (xmap->v4l2_type) { | ||
55 | case V4L2_CTRL_TYPE_INTEGER: | ||
56 | case V4L2_CTRL_TYPE_BOOLEAN: | ||
57 | case V4L2_CTRL_TYPE_BUTTON: | ||
58 | break; | ||
59 | |||
60 | case V4L2_CTRL_TYPE_MENU: | ||
61 | if (old) { | ||
62 | uvc_trace(UVC_TRACE_CONTROL, "V4L2_CTRL_TYPE_MENU not " | ||
63 | "supported for UVCIOC_CTRL_MAP_OLD.\n"); | ||
64 | ret = -EINVAL; | ||
65 | goto done; | ||
66 | } | ||
67 | |||
68 | size = xmap->menu_count * sizeof(*map->menu_info); | ||
69 | map->menu_info = kmalloc(size, GFP_KERNEL); | ||
70 | if (map->menu_info == NULL) { | ||
71 | ret = -ENOMEM; | ||
72 | goto done; | ||
73 | } | ||
74 | |||
75 | if (copy_from_user(map->menu_info, xmap->menu_info, size)) { | ||
76 | ret = -EFAULT; | ||
77 | goto done; | ||
78 | } | ||
79 | |||
80 | map->menu_count = xmap->menu_count; | ||
81 | break; | ||
82 | |||
83 | default: | ||
84 | uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type " | ||
85 | "%u.\n", xmap->v4l2_type); | ||
86 | ret = -ENOTTY; | ||
87 | goto done; | ||
88 | } | ||
89 | |||
90 | ret = uvc_ctrl_add_mapping(chain, map); | ||
91 | |||
92 | done: | ||
93 | kfree(map->menu_info); | ||
94 | kfree(map); | ||
95 | |||
96 | return ret; | ||
97 | } | ||
98 | |||
99 | /* ------------------------------------------------------------------------ | ||
100 | * V4L2 interface | ||
101 | */ | ||
102 | |||
103 | /* | ||
104 | * Find the frame interval closest to the requested frame interval for the | ||
105 | * given frame format and size. This should be done by the device as part of | ||
106 | * the Video Probe and Commit negotiation, but some hardware don't implement | ||
107 | * that feature. | ||
108 | */ | ||
109 | static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) | ||
110 | { | ||
111 | unsigned int i; | ||
112 | |||
113 | if (frame->bFrameIntervalType) { | ||
114 | __u32 best = -1, dist; | ||
115 | |||
116 | for (i = 0; i < frame->bFrameIntervalType; ++i) { | ||
117 | dist = interval > frame->dwFrameInterval[i] | ||
118 | ? interval - frame->dwFrameInterval[i] | ||
119 | : frame->dwFrameInterval[i] - interval; | ||
120 | |||
121 | if (dist > best) | ||
122 | break; | ||
123 | |||
124 | best = dist; | ||
125 | } | ||
126 | |||
127 | interval = frame->dwFrameInterval[i-1]; | ||
128 | } else { | ||
129 | const __u32 min = frame->dwFrameInterval[0]; | ||
130 | const __u32 max = frame->dwFrameInterval[1]; | ||
131 | const __u32 step = frame->dwFrameInterval[2]; | ||
132 | |||
133 | interval = min + (interval - min + step/2) / step * step; | ||
134 | if (interval > max) | ||
135 | interval = max; | ||
136 | } | ||
137 | |||
138 | return interval; | ||
139 | } | ||
140 | |||
141 | static int uvc_v4l2_try_format(struct uvc_streaming *stream, | ||
142 | struct v4l2_format *fmt, struct uvc_streaming_control *probe, | ||
143 | struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) | ||
144 | { | ||
145 | struct uvc_format *format = NULL; | ||
146 | struct uvc_frame *frame = NULL; | ||
147 | __u16 rw, rh; | ||
148 | unsigned int d, maxd; | ||
149 | unsigned int i; | ||
150 | __u32 interval; | ||
151 | int ret = 0; | ||
152 | __u8 *fcc; | ||
153 | |||
154 | if (fmt->type != stream->type) | ||
155 | return -EINVAL; | ||
156 | |||
157 | fcc = (__u8 *)&fmt->fmt.pix.pixelformat; | ||
158 | uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n", | ||
159 | fmt->fmt.pix.pixelformat, | ||
160 | fcc[0], fcc[1], fcc[2], fcc[3], | ||
161 | fmt->fmt.pix.width, fmt->fmt.pix.height); | ||
162 | |||
163 | /* Check if the hardware supports the requested format. */ | ||
164 | for (i = 0; i < stream->nformats; ++i) { | ||
165 | format = &stream->format[i]; | ||
166 | if (format->fcc == fmt->fmt.pix.pixelformat) | ||
167 | break; | ||
168 | } | ||
169 | |||
170 | if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) { | ||
171 | uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n", | ||
172 | fmt->fmt.pix.pixelformat); | ||
173 | return -EINVAL; | ||
174 | } | ||
175 | |||
176 | /* Find the closest image size. The distance between image sizes is | ||
177 | * the size in pixels of the non-overlapping regions between the | ||
178 | * requested size and the frame-specified size. | ||
179 | */ | ||
180 | rw = fmt->fmt.pix.width; | ||
181 | rh = fmt->fmt.pix.height; | ||
182 | maxd = (unsigned int)-1; | ||
183 | |||
184 | for (i = 0; i < format->nframes; ++i) { | ||
185 | __u16 w = format->frame[i].wWidth; | ||
186 | __u16 h = format->frame[i].wHeight; | ||
187 | |||
188 | d = min(w, rw) * min(h, rh); | ||
189 | d = w*h + rw*rh - 2*d; | ||
190 | if (d < maxd) { | ||
191 | maxd = d; | ||
192 | frame = &format->frame[i]; | ||
193 | } | ||
194 | |||
195 | if (maxd == 0) | ||
196 | break; | ||
197 | } | ||
198 | |||
199 | if (frame == NULL) { | ||
200 | uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n", | ||
201 | fmt->fmt.pix.width, fmt->fmt.pix.height); | ||
202 | return -EINVAL; | ||
203 | } | ||
204 | |||
205 | /* Use the default frame interval. */ | ||
206 | interval = frame->dwDefaultFrameInterval; | ||
207 | uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us " | ||
208 | "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval, | ||
209 | (100000000/interval)%10); | ||
210 | |||
211 | /* Set the format index, frame index and frame interval. */ | ||
212 | memset(probe, 0, sizeof *probe); | ||
213 | probe->bmHint = 1; /* dwFrameInterval */ | ||
214 | probe->bFormatIndex = format->index; | ||
215 | probe->bFrameIndex = frame->bFrameIndex; | ||
216 | probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); | ||
217 | /* Some webcams stall the probe control set request when the | ||
218 | * dwMaxVideoFrameSize field is set to zero. The UVC specification | ||
219 | * clearly states that the field is read-only from the host, so this | ||
220 | * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by | ||
221 | * the webcam to work around the problem. | ||
222 | * | ||
223 | * The workaround could probably be enabled for all webcams, so the | ||
224 | * quirk can be removed if needed. It's currently useful to detect | ||
225 | * webcam bugs and fix them before they hit the market (providing | ||
226 | * developers test their webcams with the Linux driver as well as with | ||
227 | * the Windows driver). | ||
228 | */ | ||
229 | mutex_lock(&stream->mutex); | ||
230 | if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) | ||
231 | probe->dwMaxVideoFrameSize = | ||
232 | stream->ctrl.dwMaxVideoFrameSize; | ||
233 | |||
234 | /* Probe the device. */ | ||
235 | ret = uvc_probe_video(stream, probe); | ||
236 | mutex_unlock(&stream->mutex); | ||
237 | if (ret < 0) | ||
238 | goto done; | ||
239 | |||
240 | fmt->fmt.pix.width = frame->wWidth; | ||
241 | fmt->fmt.pix.height = frame->wHeight; | ||
242 | fmt->fmt.pix.field = V4L2_FIELD_NONE; | ||
243 | fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; | ||
244 | fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; | ||
245 | fmt->fmt.pix.colorspace = format->colorspace; | ||
246 | fmt->fmt.pix.priv = 0; | ||
247 | |||
248 | if (uvc_format != NULL) | ||
249 | *uvc_format = format; | ||
250 | if (uvc_frame != NULL) | ||
251 | *uvc_frame = frame; | ||
252 | |||
253 | done: | ||
254 | return ret; | ||
255 | } | ||
256 | |||
257 | static int uvc_v4l2_get_format(struct uvc_streaming *stream, | ||
258 | struct v4l2_format *fmt) | ||
259 | { | ||
260 | struct uvc_format *format; | ||
261 | struct uvc_frame *frame; | ||
262 | int ret = 0; | ||
263 | |||
264 | if (fmt->type != stream->type) | ||
265 | return -EINVAL; | ||
266 | |||
267 | mutex_lock(&stream->mutex); | ||
268 | format = stream->cur_format; | ||
269 | frame = stream->cur_frame; | ||
270 | |||
271 | if (format == NULL || frame == NULL) { | ||
272 | ret = -EINVAL; | ||
273 | goto done; | ||
274 | } | ||
275 | |||
276 | fmt->fmt.pix.pixelformat = format->fcc; | ||
277 | fmt->fmt.pix.width = frame->wWidth; | ||
278 | fmt->fmt.pix.height = frame->wHeight; | ||
279 | fmt->fmt.pix.field = V4L2_FIELD_NONE; | ||
280 | fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; | ||
281 | fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; | ||
282 | fmt->fmt.pix.colorspace = format->colorspace; | ||
283 | fmt->fmt.pix.priv = 0; | ||
284 | |||
285 | done: | ||
286 | mutex_unlock(&stream->mutex); | ||
287 | return ret; | ||
288 | } | ||
289 | |||
290 | static int uvc_v4l2_set_format(struct uvc_streaming *stream, | ||
291 | struct v4l2_format *fmt) | ||
292 | { | ||
293 | struct uvc_streaming_control probe; | ||
294 | struct uvc_format *format; | ||
295 | struct uvc_frame *frame; | ||
296 | int ret; | ||
297 | |||
298 | if (fmt->type != stream->type) | ||
299 | return -EINVAL; | ||
300 | |||
301 | ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); | ||
302 | if (ret < 0) | ||
303 | return ret; | ||
304 | |||
305 | mutex_lock(&stream->mutex); | ||
306 | |||
307 | if (uvc_queue_allocated(&stream->queue)) { | ||
308 | ret = -EBUSY; | ||
309 | goto done; | ||
310 | } | ||
311 | |||
312 | memcpy(&stream->ctrl, &probe, sizeof probe); | ||
313 | stream->cur_format = format; | ||
314 | stream->cur_frame = frame; | ||
315 | |||
316 | done: | ||
317 | mutex_unlock(&stream->mutex); | ||
318 | return ret; | ||
319 | } | ||
320 | |||
321 | static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, | ||
322 | struct v4l2_streamparm *parm) | ||
323 | { | ||
324 | uint32_t numerator, denominator; | ||
325 | |||
326 | if (parm->type != stream->type) | ||
327 | return -EINVAL; | ||
328 | |||
329 | mutex_lock(&stream->mutex); | ||
330 | numerator = stream->ctrl.dwFrameInterval; | ||
331 | mutex_unlock(&stream->mutex); | ||
332 | |||
333 | denominator = 10000000; | ||
334 | uvc_simplify_fraction(&numerator, &denominator, 8, 333); | ||
335 | |||
336 | memset(parm, 0, sizeof *parm); | ||
337 | parm->type = stream->type; | ||
338 | |||
339 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { | ||
340 | parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; | ||
341 | parm->parm.capture.capturemode = 0; | ||
342 | parm->parm.capture.timeperframe.numerator = numerator; | ||
343 | parm->parm.capture.timeperframe.denominator = denominator; | ||
344 | parm->parm.capture.extendedmode = 0; | ||
345 | parm->parm.capture.readbuffers = 0; | ||
346 | } else { | ||
347 | parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | ||
348 | parm->parm.output.outputmode = 0; | ||
349 | parm->parm.output.timeperframe.numerator = numerator; | ||
350 | parm->parm.output.timeperframe.denominator = denominator; | ||
351 | } | ||
352 | |||
353 | return 0; | ||
354 | } | ||
355 | |||
356 | static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, | ||
357 | struct v4l2_streamparm *parm) | ||
358 | { | ||
359 | struct uvc_streaming_control probe; | ||
360 | struct v4l2_fract timeperframe; | ||
361 | uint32_t interval; | ||
362 | int ret; | ||
363 | |||
364 | if (parm->type != stream->type) | ||
365 | return -EINVAL; | ||
366 | |||
367 | if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
368 | timeperframe = parm->parm.capture.timeperframe; | ||
369 | else | ||
370 | timeperframe = parm->parm.output.timeperframe; | ||
371 | |||
372 | interval = uvc_fraction_to_interval(timeperframe.numerator, | ||
373 | timeperframe.denominator); | ||
374 | uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", | ||
375 | timeperframe.numerator, timeperframe.denominator, interval); | ||
376 | |||
377 | mutex_lock(&stream->mutex); | ||
378 | |||
379 | if (uvc_queue_streaming(&stream->queue)) { | ||
380 | mutex_unlock(&stream->mutex); | ||
381 | return -EBUSY; | ||
382 | } | ||
383 | |||
384 | memcpy(&probe, &stream->ctrl, sizeof probe); | ||
385 | probe.dwFrameInterval = | ||
386 | uvc_try_frame_interval(stream->cur_frame, interval); | ||
387 | |||
388 | /* Probe the device with the new settings. */ | ||
389 | ret = uvc_probe_video(stream, &probe); | ||
390 | if (ret < 0) { | ||
391 | mutex_unlock(&stream->mutex); | ||
392 | return ret; | ||
393 | } | ||
394 | |||
395 | memcpy(&stream->ctrl, &probe, sizeof probe); | ||
396 | mutex_unlock(&stream->mutex); | ||
397 | |||
398 | /* Return the actual frame period. */ | ||
399 | timeperframe.numerator = probe.dwFrameInterval; | ||
400 | timeperframe.denominator = 10000000; | ||
401 | uvc_simplify_fraction(&timeperframe.numerator, | ||
402 | &timeperframe.denominator, 8, 333); | ||
403 | |||
404 | if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
405 | parm->parm.capture.timeperframe = timeperframe; | ||
406 | else | ||
407 | parm->parm.output.timeperframe = timeperframe; | ||
408 | |||
409 | return 0; | ||
410 | } | ||
411 | |||
412 | /* ------------------------------------------------------------------------ | ||
413 | * Privilege management | ||
414 | */ | ||
415 | |||
416 | /* | ||
417 | * Privilege management is the multiple-open implementation basis. The current | ||
418 | * implementation is completely transparent for the end-user and doesn't | ||
419 | * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. | ||
420 | * Those ioctls enable finer control on the device (by making possible for a | ||
421 | * user to request exclusive access to a device), but are not mature yet. | ||
422 | * Switching to the V4L2 priority mechanism might be considered in the future | ||
423 | * if this situation changes. | ||
424 | * | ||
425 | * Each open instance of a UVC device can either be in a privileged or | ||
426 | * unprivileged state. Only a single instance can be in a privileged state at | ||
427 | * a given time. Trying to perform an operation that requires privileges will | ||
428 | * automatically acquire the required privileges if possible, or return -EBUSY | ||
429 | * otherwise. Privileges are dismissed when closing the instance or when | ||
430 | * freeing the video buffers using VIDIOC_REQBUFS. | ||
431 | * | ||
432 | * Operations that require privileges are: | ||
433 | * | ||
434 | * - VIDIOC_S_INPUT | ||
435 | * - VIDIOC_S_PARM | ||
436 | * - VIDIOC_S_FMT | ||
437 | * - VIDIOC_REQBUFS | ||
438 | */ | ||
439 | static int uvc_acquire_privileges(struct uvc_fh *handle) | ||
440 | { | ||
441 | /* Always succeed if the handle is already privileged. */ | ||
442 | if (handle->state == UVC_HANDLE_ACTIVE) | ||
443 | return 0; | ||
444 | |||
445 | /* Check if the device already has a privileged handle. */ | ||
446 | if (atomic_inc_return(&handle->stream->active) != 1) { | ||
447 | atomic_dec(&handle->stream->active); | ||
448 | return -EBUSY; | ||
449 | } | ||
450 | |||
451 | handle->state = UVC_HANDLE_ACTIVE; | ||
452 | return 0; | ||
453 | } | ||
454 | |||
455 | static void uvc_dismiss_privileges(struct uvc_fh *handle) | ||
456 | { | ||
457 | if (handle->state == UVC_HANDLE_ACTIVE) | ||
458 | atomic_dec(&handle->stream->active); | ||
459 | |||
460 | handle->state = UVC_HANDLE_PASSIVE; | ||
461 | } | ||
462 | |||
463 | static int uvc_has_privileges(struct uvc_fh *handle) | ||
464 | { | ||
465 | return handle->state == UVC_HANDLE_ACTIVE; | ||
466 | } | ||
467 | |||
468 | /* ------------------------------------------------------------------------ | ||
469 | * V4L2 file operations | ||
470 | */ | ||
471 | |||
472 | static int uvc_v4l2_open(struct file *file) | ||
473 | { | ||
474 | struct uvc_streaming *stream; | ||
475 | struct uvc_fh *handle; | ||
476 | int ret = 0; | ||
477 | |||
478 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); | ||
479 | stream = video_drvdata(file); | ||
480 | |||
481 | if (stream->dev->state & UVC_DEV_DISCONNECTED) | ||
482 | return -ENODEV; | ||
483 | |||
484 | ret = usb_autopm_get_interface(stream->dev->intf); | ||
485 | if (ret < 0) | ||
486 | return ret; | ||
487 | |||
488 | /* Create the device handle. */ | ||
489 | handle = kzalloc(sizeof *handle, GFP_KERNEL); | ||
490 | if (handle == NULL) { | ||
491 | usb_autopm_put_interface(stream->dev->intf); | ||
492 | return -ENOMEM; | ||
493 | } | ||
494 | |||
495 | if (atomic_inc_return(&stream->dev->users) == 1) { | ||
496 | ret = uvc_status_start(stream->dev); | ||
497 | if (ret < 0) { | ||
498 | usb_autopm_put_interface(stream->dev->intf); | ||
499 | atomic_dec(&stream->dev->users); | ||
500 | kfree(handle); | ||
501 | return ret; | ||
502 | } | ||
503 | } | ||
504 | |||
505 | handle->chain = stream->chain; | ||
506 | handle->stream = stream; | ||
507 | handle->state = UVC_HANDLE_PASSIVE; | ||
508 | file->private_data = handle; | ||
509 | |||
510 | return 0; | ||
511 | } | ||
512 | |||
513 | static int uvc_v4l2_release(struct file *file) | ||
514 | { | ||
515 | struct uvc_fh *handle = file->private_data; | ||
516 | struct uvc_streaming *stream = handle->stream; | ||
517 | |||
518 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); | ||
519 | |||
520 | /* Only free resources if this is a privileged handle. */ | ||
521 | if (uvc_has_privileges(handle)) { | ||
522 | uvc_video_enable(stream, 0); | ||
523 | |||
524 | if (uvc_free_buffers(&stream->queue) < 0) | ||
525 | uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to " | ||
526 | "free buffers.\n"); | ||
527 | } | ||
528 | |||
529 | /* Release the file handle. */ | ||
530 | uvc_dismiss_privileges(handle); | ||
531 | kfree(handle); | ||
532 | file->private_data = NULL; | ||
533 | |||
534 | if (atomic_dec_return(&stream->dev->users) == 0) | ||
535 | uvc_status_stop(stream->dev); | ||
536 | |||
537 | usb_autopm_put_interface(stream->dev->intf); | ||
538 | return 0; | ||
539 | } | ||
540 | |||
541 | static void uvc_v4l2_ioctl_warn(void) | ||
542 | { | ||
543 | static int warned; | ||
544 | |||
545 | if (warned) | ||
546 | return; | ||
547 | |||
548 | uvc_printk(KERN_INFO, "Deprecated UVCIOC_CTRL_{ADD,MAP_OLD,GET,SET} " | ||
549 | "ioctls will be removed in 2.6.42.\n"); | ||
550 | uvc_printk(KERN_INFO, "See http://www.ideasonboard.org/uvc/upgrade/ " | ||
551 | "for upgrade instructions.\n"); | ||
552 | warned = 1; | ||
553 | } | ||
554 | |||
555 | static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) | ||
556 | { | ||
557 | struct video_device *vdev = video_devdata(file); | ||
558 | struct uvc_fh *handle = file->private_data; | ||
559 | struct uvc_video_chain *chain = handle->chain; | ||
560 | struct uvc_streaming *stream = handle->stream; | ||
561 | long ret = 0; | ||
562 | |||
563 | switch (cmd) { | ||
564 | /* Query capabilities */ | ||
565 | case VIDIOC_QUERYCAP: | ||
566 | { | ||
567 | struct v4l2_capability *cap = arg; | ||
568 | |||
569 | memset(cap, 0, sizeof *cap); | ||
570 | strlcpy(cap->driver, "uvcvideo", sizeof cap->driver); | ||
571 | strlcpy(cap->card, vdev->name, sizeof cap->card); | ||
572 | usb_make_path(stream->dev->udev, | ||
573 | cap->bus_info, sizeof(cap->bus_info)); | ||
574 | cap->version = LINUX_VERSION_CODE; | ||
575 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
576 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | ||
577 | | V4L2_CAP_STREAMING; | ||
578 | else | ||
579 | cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | ||
580 | | V4L2_CAP_STREAMING; | ||
581 | break; | ||
582 | } | ||
583 | |||
584 | /* Get, Set & Query control */ | ||
585 | case VIDIOC_QUERYCTRL: | ||
586 | return uvc_query_v4l2_ctrl(chain, arg); | ||
587 | |||
588 | case VIDIOC_G_CTRL: | ||
589 | { | ||
590 | struct v4l2_control *ctrl = arg; | ||
591 | struct v4l2_ext_control xctrl; | ||
592 | |||
593 | memset(&xctrl, 0, sizeof xctrl); | ||
594 | xctrl.id = ctrl->id; | ||
595 | |||
596 | ret = uvc_ctrl_begin(chain); | ||
597 | if (ret < 0) | ||
598 | return ret; | ||
599 | |||
600 | ret = uvc_ctrl_get(chain, &xctrl); | ||
601 | uvc_ctrl_rollback(chain); | ||
602 | if (ret >= 0) | ||
603 | ctrl->value = xctrl.value; | ||
604 | break; | ||
605 | } | ||
606 | |||
607 | case VIDIOC_S_CTRL: | ||
608 | { | ||
609 | struct v4l2_control *ctrl = arg; | ||
610 | struct v4l2_ext_control xctrl; | ||
611 | |||
612 | memset(&xctrl, 0, sizeof xctrl); | ||
613 | xctrl.id = ctrl->id; | ||
614 | xctrl.value = ctrl->value; | ||
615 | |||
616 | ret = uvc_ctrl_begin(chain); | ||
617 | if (ret < 0) | ||
618 | return ret; | ||
619 | |||
620 | ret = uvc_ctrl_set(chain, &xctrl); | ||
621 | if (ret < 0) { | ||
622 | uvc_ctrl_rollback(chain); | ||
623 | return ret; | ||
624 | } | ||
625 | ret = uvc_ctrl_commit(chain); | ||
626 | if (ret == 0) | ||
627 | ctrl->value = xctrl.value; | ||
628 | break; | ||
629 | } | ||
630 | |||
631 | case VIDIOC_QUERYMENU: | ||
632 | return uvc_query_v4l2_menu(chain, arg); | ||
633 | |||
634 | case VIDIOC_G_EXT_CTRLS: | ||
635 | { | ||
636 | struct v4l2_ext_controls *ctrls = arg; | ||
637 | struct v4l2_ext_control *ctrl = ctrls->controls; | ||
638 | unsigned int i; | ||
639 | |||
640 | ret = uvc_ctrl_begin(chain); | ||
641 | if (ret < 0) | ||
642 | return ret; | ||
643 | |||
644 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { | ||
645 | ret = uvc_ctrl_get(chain, ctrl); | ||
646 | if (ret < 0) { | ||
647 | uvc_ctrl_rollback(chain); | ||
648 | ctrls->error_idx = i; | ||
649 | return ret; | ||
650 | } | ||
651 | } | ||
652 | ctrls->error_idx = 0; | ||
653 | ret = uvc_ctrl_rollback(chain); | ||
654 | break; | ||
655 | } | ||
656 | |||
657 | case VIDIOC_S_EXT_CTRLS: | ||
658 | case VIDIOC_TRY_EXT_CTRLS: | ||
659 | { | ||
660 | struct v4l2_ext_controls *ctrls = arg; | ||
661 | struct v4l2_ext_control *ctrl = ctrls->controls; | ||
662 | unsigned int i; | ||
663 | |||
664 | ret = uvc_ctrl_begin(chain); | ||
665 | if (ret < 0) | ||
666 | return ret; | ||
667 | |||
668 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { | ||
669 | ret = uvc_ctrl_set(chain, ctrl); | ||
670 | if (ret < 0) { | ||
671 | uvc_ctrl_rollback(chain); | ||
672 | ctrls->error_idx = i; | ||
673 | return ret; | ||
674 | } | ||
675 | } | ||
676 | |||
677 | ctrls->error_idx = 0; | ||
678 | |||
679 | if (cmd == VIDIOC_S_EXT_CTRLS) | ||
680 | ret = uvc_ctrl_commit(chain); | ||
681 | else | ||
682 | ret = uvc_ctrl_rollback(chain); | ||
683 | break; | ||
684 | } | ||
685 | |||
686 | /* Get, Set & Enum input */ | ||
687 | case VIDIOC_ENUMINPUT: | ||
688 | { | ||
689 | const struct uvc_entity *selector = chain->selector; | ||
690 | struct v4l2_input *input = arg; | ||
691 | struct uvc_entity *iterm = NULL; | ||
692 | u32 index = input->index; | ||
693 | int pin = 0; | ||
694 | |||
695 | if (selector == NULL || | ||
696 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | ||
697 | if (index != 0) | ||
698 | return -EINVAL; | ||
699 | list_for_each_entry(iterm, &chain->entities, chain) { | ||
700 | if (UVC_ENTITY_IS_ITERM(iterm)) | ||
701 | break; | ||
702 | } | ||
703 | pin = iterm->id; | ||
704 | } else if (pin < selector->bNrInPins) { | ||
705 | pin = selector->baSourceID[index]; | ||
706 | list_for_each_entry(iterm, &chain->entities, chain) { | ||
707 | if (!UVC_ENTITY_IS_ITERM(iterm)) | ||
708 | continue; | ||
709 | if (iterm->id == pin) | ||
710 | break; | ||
711 | } | ||
712 | } | ||
713 | |||
714 | if (iterm == NULL || iterm->id != pin) | ||
715 | return -EINVAL; | ||
716 | |||
717 | memset(input, 0, sizeof *input); | ||
718 | input->index = index; | ||
719 | strlcpy(input->name, iterm->name, sizeof input->name); | ||
720 | if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) | ||
721 | input->type = V4L2_INPUT_TYPE_CAMERA; | ||
722 | break; | ||
723 | } | ||
724 | |||
725 | case VIDIOC_G_INPUT: | ||
726 | { | ||
727 | u8 input; | ||
728 | |||
729 | if (chain->selector == NULL || | ||
730 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | ||
731 | *(int *)arg = 0; | ||
732 | break; | ||
733 | } | ||
734 | |||
735 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, | ||
736 | chain->selector->id, chain->dev->intfnum, | ||
737 | UVC_SU_INPUT_SELECT_CONTROL, &input, 1); | ||
738 | if (ret < 0) | ||
739 | return ret; | ||
740 | |||
741 | *(int *)arg = input - 1; | ||
742 | break; | ||
743 | } | ||
744 | |||
745 | case VIDIOC_S_INPUT: | ||
746 | { | ||
747 | u32 input = *(u32 *)arg + 1; | ||
748 | |||
749 | if ((ret = uvc_acquire_privileges(handle)) < 0) | ||
750 | return ret; | ||
751 | |||
752 | if (chain->selector == NULL || | ||
753 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | ||
754 | if (input != 1) | ||
755 | return -EINVAL; | ||
756 | break; | ||
757 | } | ||
758 | |||
759 | if (input == 0 || input > chain->selector->bNrInPins) | ||
760 | return -EINVAL; | ||
761 | |||
762 | return uvc_query_ctrl(chain->dev, UVC_SET_CUR, | ||
763 | chain->selector->id, chain->dev->intfnum, | ||
764 | UVC_SU_INPUT_SELECT_CONTROL, &input, 1); | ||
765 | } | ||
766 | |||
767 | /* Try, Get, Set & Enum format */ | ||
768 | case VIDIOC_ENUM_FMT: | ||
769 | { | ||
770 | struct v4l2_fmtdesc *fmt = arg; | ||
771 | struct uvc_format *format; | ||
772 | enum v4l2_buf_type type = fmt->type; | ||
773 | __u32 index = fmt->index; | ||
774 | |||
775 | if (fmt->type != stream->type || | ||
776 | fmt->index >= stream->nformats) | ||
777 | return -EINVAL; | ||
778 | |||
779 | memset(fmt, 0, sizeof(*fmt)); | ||
780 | fmt->index = index; | ||
781 | fmt->type = type; | ||
782 | |||
783 | format = &stream->format[fmt->index]; | ||
784 | fmt->flags = 0; | ||
785 | if (format->flags & UVC_FMT_FLAG_COMPRESSED) | ||
786 | fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; | ||
787 | strlcpy(fmt->description, format->name, | ||
788 | sizeof fmt->description); | ||
789 | fmt->description[sizeof fmt->description - 1] = 0; | ||
790 | fmt->pixelformat = format->fcc; | ||
791 | break; | ||
792 | } | ||
793 | |||
794 | case VIDIOC_TRY_FMT: | ||
795 | { | ||
796 | struct uvc_streaming_control probe; | ||
797 | |||
798 | return uvc_v4l2_try_format(stream, arg, &probe, NULL, NULL); | ||
799 | } | ||
800 | |||
801 | case VIDIOC_S_FMT: | ||
802 | if ((ret = uvc_acquire_privileges(handle)) < 0) | ||
803 | return ret; | ||
804 | |||
805 | return uvc_v4l2_set_format(stream, arg); | ||
806 | |||
807 | case VIDIOC_G_FMT: | ||
808 | return uvc_v4l2_get_format(stream, arg); | ||
809 | |||
810 | /* Frame size enumeration */ | ||
811 | case VIDIOC_ENUM_FRAMESIZES: | ||
812 | { | ||
813 | struct v4l2_frmsizeenum *fsize = arg; | ||
814 | struct uvc_format *format = NULL; | ||
815 | struct uvc_frame *frame; | ||
816 | int i; | ||
817 | |||
818 | /* Look for the given pixel format */ | ||
819 | for (i = 0; i < stream->nformats; i++) { | ||
820 | if (stream->format[i].fcc == | ||
821 | fsize->pixel_format) { | ||
822 | format = &stream->format[i]; | ||
823 | break; | ||
824 | } | ||
825 | } | ||
826 | if (format == NULL) | ||
827 | return -EINVAL; | ||
828 | |||
829 | if (fsize->index >= format->nframes) | ||
830 | return -EINVAL; | ||
831 | |||
832 | frame = &format->frame[fsize->index]; | ||
833 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | ||
834 | fsize->discrete.width = frame->wWidth; | ||
835 | fsize->discrete.height = frame->wHeight; | ||
836 | break; | ||
837 | } | ||
838 | |||
839 | /* Frame interval enumeration */ | ||
840 | case VIDIOC_ENUM_FRAMEINTERVALS: | ||
841 | { | ||
842 | struct v4l2_frmivalenum *fival = arg; | ||
843 | struct uvc_format *format = NULL; | ||
844 | struct uvc_frame *frame = NULL; | ||
845 | int i; | ||
846 | |||
847 | /* Look for the given pixel format and frame size */ | ||
848 | for (i = 0; i < stream->nformats; i++) { | ||
849 | if (stream->format[i].fcc == | ||
850 | fival->pixel_format) { | ||
851 | format = &stream->format[i]; | ||
852 | break; | ||
853 | } | ||
854 | } | ||
855 | if (format == NULL) | ||
856 | return -EINVAL; | ||
857 | |||
858 | for (i = 0; i < format->nframes; i++) { | ||
859 | if (format->frame[i].wWidth == fival->width && | ||
860 | format->frame[i].wHeight == fival->height) { | ||
861 | frame = &format->frame[i]; | ||
862 | break; | ||
863 | } | ||
864 | } | ||
865 | if (frame == NULL) | ||
866 | return -EINVAL; | ||
867 | |||
868 | if (frame->bFrameIntervalType) { | ||
869 | if (fival->index >= frame->bFrameIntervalType) | ||
870 | return -EINVAL; | ||
871 | |||
872 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; | ||
873 | fival->discrete.numerator = | ||
874 | frame->dwFrameInterval[fival->index]; | ||
875 | fival->discrete.denominator = 10000000; | ||
876 | uvc_simplify_fraction(&fival->discrete.numerator, | ||
877 | &fival->discrete.denominator, 8, 333); | ||
878 | } else { | ||
879 | fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; | ||
880 | fival->stepwise.min.numerator = | ||
881 | frame->dwFrameInterval[0]; | ||
882 | fival->stepwise.min.denominator = 10000000; | ||
883 | fival->stepwise.max.numerator = | ||
884 | frame->dwFrameInterval[1]; | ||
885 | fival->stepwise.max.denominator = 10000000; | ||
886 | fival->stepwise.step.numerator = | ||
887 | frame->dwFrameInterval[2]; | ||
888 | fival->stepwise.step.denominator = 10000000; | ||
889 | uvc_simplify_fraction(&fival->stepwise.min.numerator, | ||
890 | &fival->stepwise.min.denominator, 8, 333); | ||
891 | uvc_simplify_fraction(&fival->stepwise.max.numerator, | ||
892 | &fival->stepwise.max.denominator, 8, 333); | ||
893 | uvc_simplify_fraction(&fival->stepwise.step.numerator, | ||
894 | &fival->stepwise.step.denominator, 8, 333); | ||
895 | } | ||
896 | break; | ||
897 | } | ||
898 | |||
899 | /* Get & Set streaming parameters */ | ||
900 | case VIDIOC_G_PARM: | ||
901 | return uvc_v4l2_get_streamparm(stream, arg); | ||
902 | |||
903 | case VIDIOC_S_PARM: | ||
904 | if ((ret = uvc_acquire_privileges(handle)) < 0) | ||
905 | return ret; | ||
906 | |||
907 | return uvc_v4l2_set_streamparm(stream, arg); | ||
908 | |||
909 | /* Cropping and scaling */ | ||
910 | case VIDIOC_CROPCAP: | ||
911 | { | ||
912 | struct v4l2_cropcap *ccap = arg; | ||
913 | |||
914 | if (ccap->type != stream->type) | ||
915 | return -EINVAL; | ||
916 | |||
917 | ccap->bounds.left = 0; | ||
918 | ccap->bounds.top = 0; | ||
919 | |||
920 | mutex_lock(&stream->mutex); | ||
921 | ccap->bounds.width = stream->cur_frame->wWidth; | ||
922 | ccap->bounds.height = stream->cur_frame->wHeight; | ||
923 | mutex_unlock(&stream->mutex); | ||
924 | |||
925 | ccap->defrect = ccap->bounds; | ||
926 | |||
927 | ccap->pixelaspect.numerator = 1; | ||
928 | ccap->pixelaspect.denominator = 1; | ||
929 | break; | ||
930 | } | ||
931 | |||
932 | case VIDIOC_G_CROP: | ||
933 | case VIDIOC_S_CROP: | ||
934 | return -EINVAL; | ||
935 | |||
936 | /* Buffers & streaming */ | ||
937 | case VIDIOC_REQBUFS: | ||
938 | { | ||
939 | struct v4l2_requestbuffers *rb = arg; | ||
940 | |||
941 | if (rb->type != stream->type || | ||
942 | rb->memory != V4L2_MEMORY_MMAP) | ||
943 | return -EINVAL; | ||
944 | |||
945 | if ((ret = uvc_acquire_privileges(handle)) < 0) | ||
946 | return ret; | ||
947 | |||
948 | mutex_lock(&stream->mutex); | ||
949 | ret = uvc_alloc_buffers(&stream->queue, rb->count, | ||
950 | stream->ctrl.dwMaxVideoFrameSize); | ||
951 | mutex_unlock(&stream->mutex); | ||
952 | if (ret < 0) | ||
953 | return ret; | ||
954 | |||
955 | if (ret == 0) | ||
956 | uvc_dismiss_privileges(handle); | ||
957 | |||
958 | rb->count = ret; | ||
959 | ret = 0; | ||
960 | break; | ||
961 | } | ||
962 | |||
963 | case VIDIOC_QUERYBUF: | ||
964 | { | ||
965 | struct v4l2_buffer *buf = arg; | ||
966 | |||
967 | if (buf->type != stream->type) | ||
968 | return -EINVAL; | ||
969 | |||
970 | if (!uvc_has_privileges(handle)) | ||
971 | return -EBUSY; | ||
972 | |||
973 | return uvc_query_buffer(&stream->queue, buf); | ||
974 | } | ||
975 | |||
976 | case VIDIOC_QBUF: | ||
977 | if (!uvc_has_privileges(handle)) | ||
978 | return -EBUSY; | ||
979 | |||
980 | return uvc_queue_buffer(&stream->queue, arg); | ||
981 | |||
982 | case VIDIOC_DQBUF: | ||
983 | if (!uvc_has_privileges(handle)) | ||
984 | return -EBUSY; | ||
985 | |||
986 | return uvc_dequeue_buffer(&stream->queue, arg, | ||
987 | file->f_flags & O_NONBLOCK); | ||
988 | |||
989 | case VIDIOC_STREAMON: | ||
990 | { | ||
991 | int *type = arg; | ||
992 | |||
993 | if (*type != stream->type) | ||
994 | return -EINVAL; | ||
995 | |||
996 | if (!uvc_has_privileges(handle)) | ||
997 | return -EBUSY; | ||
998 | |||
999 | mutex_lock(&stream->mutex); | ||
1000 | ret = uvc_video_enable(stream, 1); | ||
1001 | mutex_unlock(&stream->mutex); | ||
1002 | if (ret < 0) | ||
1003 | return ret; | ||
1004 | break; | ||
1005 | } | ||
1006 | |||
1007 | case VIDIOC_STREAMOFF: | ||
1008 | { | ||
1009 | int *type = arg; | ||
1010 | |||
1011 | if (*type != stream->type) | ||
1012 | return -EINVAL; | ||
1013 | |||
1014 | if (!uvc_has_privileges(handle)) | ||
1015 | return -EBUSY; | ||
1016 | |||
1017 | return uvc_video_enable(stream, 0); | ||
1018 | } | ||
1019 | |||
1020 | /* Analog video standards make no sense for digital cameras. */ | ||
1021 | case VIDIOC_ENUMSTD: | ||
1022 | case VIDIOC_QUERYSTD: | ||
1023 | case VIDIOC_G_STD: | ||
1024 | case VIDIOC_S_STD: | ||
1025 | |||
1026 | case VIDIOC_OVERLAY: | ||
1027 | |||
1028 | case VIDIOC_ENUMAUDIO: | ||
1029 | case VIDIOC_ENUMAUDOUT: | ||
1030 | |||
1031 | case VIDIOC_ENUMOUTPUT: | ||
1032 | uvc_trace(UVC_TRACE_IOCTL, "Unsupported ioctl 0x%08x\n", cmd); | ||
1033 | return -EINVAL; | ||
1034 | |||
1035 | /* Dynamic controls. UVCIOC_CTRL_ADD, UVCIOC_CTRL_MAP_OLD, | ||
1036 | * UVCIOC_CTRL_GET and UVCIOC_CTRL_SET are deprecated and scheduled for | ||
1037 | * removal in 2.6.42. | ||
1038 | */ | ||
1039 | case __UVCIOC_CTRL_ADD: | ||
1040 | uvc_v4l2_ioctl_warn(); | ||
1041 | return -EEXIST; | ||
1042 | |||
1043 | case __UVCIOC_CTRL_MAP_OLD: | ||
1044 | uvc_v4l2_ioctl_warn(); | ||
1045 | case __UVCIOC_CTRL_MAP: | ||
1046 | case UVCIOC_CTRL_MAP: | ||
1047 | return uvc_ioctl_ctrl_map(chain, arg, | ||
1048 | cmd == __UVCIOC_CTRL_MAP_OLD); | ||
1049 | |||
1050 | case __UVCIOC_CTRL_GET: | ||
1051 | case __UVCIOC_CTRL_SET: | ||
1052 | { | ||
1053 | struct uvc_xu_control *xctrl = arg; | ||
1054 | struct uvc_xu_control_query xqry = { | ||
1055 | .unit = xctrl->unit, | ||
1056 | .selector = xctrl->selector, | ||
1057 | .query = cmd == __UVCIOC_CTRL_GET | ||
1058 | ? UVC_GET_CUR : UVC_SET_CUR, | ||
1059 | .size = xctrl->size, | ||
1060 | .data = xctrl->data, | ||
1061 | }; | ||
1062 | |||
1063 | uvc_v4l2_ioctl_warn(); | ||
1064 | return uvc_xu_ctrl_query(chain, &xqry); | ||
1065 | } | ||
1066 | |||
1067 | case UVCIOC_CTRL_QUERY: | ||
1068 | return uvc_xu_ctrl_query(chain, arg); | ||
1069 | |||
1070 | default: | ||
1071 | uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", cmd); | ||
1072 | return -EINVAL; | ||
1073 | } | ||
1074 | |||
1075 | return ret; | ||
1076 | } | ||
1077 | |||
1078 | static long uvc_v4l2_ioctl(struct file *file, | ||
1079 | unsigned int cmd, unsigned long arg) | ||
1080 | { | ||
1081 | if (uvc_trace_param & UVC_TRACE_IOCTL) { | ||
1082 | uvc_printk(KERN_DEBUG, "uvc_v4l2_ioctl("); | ||
1083 | v4l_printk_ioctl(cmd); | ||
1084 | printk(")\n"); | ||
1085 | } | ||
1086 | |||
1087 | return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl); | ||
1088 | } | ||
1089 | |||
1090 | static ssize_t uvc_v4l2_read(struct file *file, char __user *data, | ||
1091 | size_t count, loff_t *ppos) | ||
1092 | { | ||
1093 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); | ||
1094 | return -EINVAL; | ||
1095 | } | ||
1096 | |||
1097 | static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) | ||
1098 | { | ||
1099 | struct uvc_fh *handle = file->private_data; | ||
1100 | struct uvc_streaming *stream = handle->stream; | ||
1101 | |||
1102 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); | ||
1103 | |||
1104 | return uvc_queue_mmap(&stream->queue, vma); | ||
1105 | } | ||
1106 | |||
1107 | static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) | ||
1108 | { | ||
1109 | struct uvc_fh *handle = file->private_data; | ||
1110 | struct uvc_streaming *stream = handle->stream; | ||
1111 | |||
1112 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); | ||
1113 | |||
1114 | return uvc_queue_poll(&stream->queue, file, wait); | ||
1115 | } | ||
1116 | |||
1117 | #ifndef CONFIG_MMU | ||
1118 | static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, | ||
1119 | unsigned long addr, unsigned long len, unsigned long pgoff, | ||
1120 | unsigned long flags) | ||
1121 | { | ||
1122 | struct uvc_fh *handle = file->private_data; | ||
1123 | struct uvc_streaming *stream = handle->stream; | ||
1124 | |||
1125 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); | ||
1126 | |||
1127 | return uvc_queue_get_unmapped_area(&stream->queue, pgoff); | ||
1128 | } | ||
1129 | #endif | ||
1130 | |||
1131 | const struct v4l2_file_operations uvc_fops = { | ||
1132 | .owner = THIS_MODULE, | ||
1133 | .open = uvc_v4l2_open, | ||
1134 | .release = uvc_v4l2_release, | ||
1135 | .unlocked_ioctl = uvc_v4l2_ioctl, | ||
1136 | .read = uvc_v4l2_read, | ||
1137 | .mmap = uvc_v4l2_mmap, | ||
1138 | .poll = uvc_v4l2_poll, | ||
1139 | #ifndef CONFIG_MMU | ||
1140 | .get_unmapped_area = uvc_v4l2_get_unmapped_area, | ||
1141 | #endif | ||
1142 | }; | ||
1143 | |||