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Commit | Line | Data |
---|---|---|
c0efd232 LP |
1 | /* |
2 | * uvc_v4l2.c -- USB Video Class driver - V4L2 API | |
3 | * | |
11fc5baf LP |
4 | * Copyright (C) 2005-2010 |
5 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
c0efd232 LP |
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 | ||
1a5e4c86 | 14 | #include <linux/compat.h> |
c0efd232 LP |
15 | #include <linux/kernel.h> |
16 | #include <linux/version.h> | |
17 | #include <linux/list.h> | |
18 | #include <linux/module.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
c0efd232 LP |
20 | #include <linux/usb.h> |
21 | #include <linux/videodev2.h> | |
22 | #include <linux/vmalloc.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/wait.h> | |
60063497 | 25 | #include <linux/atomic.h> |
c0efd232 LP |
26 | |
27 | #include <media/v4l2-common.h> | |
b4012002 HG |
28 | #include <media/v4l2-ctrls.h> |
29 | #include <media/v4l2-event.h> | |
35ea11ff | 30 | #include <media/v4l2-ioctl.h> |
c0efd232 LP |
31 | |
32 | #include "uvcvideo.h" | |
33 | ||
561474c2 LP |
34 | /* ------------------------------------------------------------------------ |
35 | * UVC ioctls | |
36 | */ | |
ba2fa996 | 37 | static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, |
227bd5b3 | 38 | struct uvc_xu_control_mapping *xmap) |
561474c2 LP |
39 | { |
40 | struct uvc_control_mapping *map; | |
41 | unsigned int size; | |
42 | int ret; | |
43 | ||
44 | map = kzalloc(sizeof *map, GFP_KERNEL); | |
45 | if (map == NULL) | |
46 | return -ENOMEM; | |
47 | ||
48 | map->id = xmap->id; | |
49 | memcpy(map->name, xmap->name, sizeof map->name); | |
50 | memcpy(map->entity, xmap->entity, sizeof map->entity); | |
51 | map->selector = xmap->selector; | |
52 | map->size = xmap->size; | |
53 | map->offset = xmap->offset; | |
54 | map->v4l2_type = xmap->v4l2_type; | |
55 | map->data_type = xmap->data_type; | |
56 | ||
57 | switch (xmap->v4l2_type) { | |
58 | case V4L2_CTRL_TYPE_INTEGER: | |
59 | case V4L2_CTRL_TYPE_BOOLEAN: | |
60 | case V4L2_CTRL_TYPE_BUTTON: | |
61 | break; | |
62 | ||
63 | case V4L2_CTRL_TYPE_MENU: | |
806e23e9 HC |
64 | /* Prevent excessive memory consumption, as well as integer |
65 | * overflows. | |
66 | */ | |
67 | if (xmap->menu_count == 0 || | |
68 | xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) { | |
69 | ret = -EINVAL; | |
70 | goto done; | |
71 | } | |
72 | ||
561474c2 LP |
73 | size = xmap->menu_count * sizeof(*map->menu_info); |
74 | map->menu_info = kmalloc(size, GFP_KERNEL); | |
75 | if (map->menu_info == NULL) { | |
76 | ret = -ENOMEM; | |
77 | goto done; | |
78 | } | |
79 | ||
80 | if (copy_from_user(map->menu_info, xmap->menu_info, size)) { | |
81 | ret = -EFAULT; | |
82 | goto done; | |
83 | } | |
84 | ||
85 | map->menu_count = xmap->menu_count; | |
86 | break; | |
87 | ||
88 | default: | |
ba2fa996 LP |
89 | uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type " |
90 | "%u.\n", xmap->v4l2_type); | |
7a286cc1 | 91 | ret = -ENOTTY; |
561474c2 LP |
92 | goto done; |
93 | } | |
94 | ||
ba2fa996 | 95 | ret = uvc_ctrl_add_mapping(chain, map); |
561474c2 LP |
96 | |
97 | done: | |
ba2fa996 LP |
98 | kfree(map->menu_info); |
99 | kfree(map); | |
561474c2 LP |
100 | |
101 | return ret; | |
102 | } | |
103 | ||
c0efd232 LP |
104 | /* ------------------------------------------------------------------------ |
105 | * V4L2 interface | |
106 | */ | |
107 | ||
c0efd232 LP |
108 | /* |
109 | * Find the frame interval closest to the requested frame interval for the | |
110 | * given frame format and size. This should be done by the device as part of | |
111 | * the Video Probe and Commit negotiation, but some hardware don't implement | |
112 | * that feature. | |
113 | */ | |
114 | static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) | |
115 | { | |
116 | unsigned int i; | |
117 | ||
118 | if (frame->bFrameIntervalType) { | |
119 | __u32 best = -1, dist; | |
120 | ||
121 | for (i = 0; i < frame->bFrameIntervalType; ++i) { | |
122 | dist = interval > frame->dwFrameInterval[i] | |
123 | ? interval - frame->dwFrameInterval[i] | |
124 | : frame->dwFrameInterval[i] - interval; | |
125 | ||
126 | if (dist > best) | |
127 | break; | |
128 | ||
129 | best = dist; | |
130 | } | |
131 | ||
132 | interval = frame->dwFrameInterval[i-1]; | |
133 | } else { | |
134 | const __u32 min = frame->dwFrameInterval[0]; | |
135 | const __u32 max = frame->dwFrameInterval[1]; | |
136 | const __u32 step = frame->dwFrameInterval[2]; | |
137 | ||
138 | interval = min + (interval - min + step/2) / step * step; | |
139 | if (interval > max) | |
140 | interval = max; | |
141 | } | |
142 | ||
143 | return interval; | |
144 | } | |
145 | ||
35f02a68 | 146 | static int uvc_v4l2_try_format(struct uvc_streaming *stream, |
c0efd232 LP |
147 | struct v4l2_format *fmt, struct uvc_streaming_control *probe, |
148 | struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) | |
149 | { | |
150 | struct uvc_format *format = NULL; | |
151 | struct uvc_frame *frame = NULL; | |
152 | __u16 rw, rh; | |
153 | unsigned int d, maxd; | |
154 | unsigned int i; | |
155 | __u32 interval; | |
156 | int ret = 0; | |
157 | __u8 *fcc; | |
158 | ||
35f02a68 | 159 | if (fmt->type != stream->type) |
c0efd232 LP |
160 | return -EINVAL; |
161 | ||
162 | fcc = (__u8 *)&fmt->fmt.pix.pixelformat; | |
163 | uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n", | |
164 | fmt->fmt.pix.pixelformat, | |
165 | fcc[0], fcc[1], fcc[2], fcc[3], | |
166 | fmt->fmt.pix.width, fmt->fmt.pix.height); | |
167 | ||
815adc46 LP |
168 | /* Check if the hardware supports the requested format, use the default |
169 | * format otherwise. | |
170 | */ | |
35f02a68 LP |
171 | for (i = 0; i < stream->nformats; ++i) { |
172 | format = &stream->format[i]; | |
c0efd232 LP |
173 | if (format->fcc == fmt->fmt.pix.pixelformat) |
174 | break; | |
175 | } | |
176 | ||
815adc46 LP |
177 | if (i == stream->nformats) { |
178 | format = stream->def_format; | |
179 | fmt->fmt.pix.pixelformat = format->fcc; | |
c0efd232 LP |
180 | } |
181 | ||
182 | /* Find the closest image size. The distance between image sizes is | |
183 | * the size in pixels of the non-overlapping regions between the | |
184 | * requested size and the frame-specified size. | |
185 | */ | |
186 | rw = fmt->fmt.pix.width; | |
187 | rh = fmt->fmt.pix.height; | |
188 | maxd = (unsigned int)-1; | |
189 | ||
190 | for (i = 0; i < format->nframes; ++i) { | |
191 | __u16 w = format->frame[i].wWidth; | |
192 | __u16 h = format->frame[i].wHeight; | |
193 | ||
194 | d = min(w, rw) * min(h, rh); | |
195 | d = w*h + rw*rh - 2*d; | |
196 | if (d < maxd) { | |
197 | maxd = d; | |
198 | frame = &format->frame[i]; | |
199 | } | |
200 | ||
201 | if (maxd == 0) | |
202 | break; | |
203 | } | |
204 | ||
205 | if (frame == NULL) { | |
206 | uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n", | |
207 | fmt->fmt.pix.width, fmt->fmt.pix.height); | |
208 | return -EINVAL; | |
209 | } | |
210 | ||
211 | /* Use the default frame interval. */ | |
212 | interval = frame->dwDefaultFrameInterval; | |
213 | uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us " | |
214 | "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval, | |
215 | (100000000/interval)%10); | |
216 | ||
217 | /* Set the format index, frame index and frame interval. */ | |
218 | memset(probe, 0, sizeof *probe); | |
219 | probe->bmHint = 1; /* dwFrameInterval */ | |
220 | probe->bFormatIndex = format->index; | |
221 | probe->bFrameIndex = frame->bFrameIndex; | |
222 | probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); | |
223 | /* Some webcams stall the probe control set request when the | |
224 | * dwMaxVideoFrameSize field is set to zero. The UVC specification | |
225 | * clearly states that the field is read-only from the host, so this | |
226 | * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by | |
227 | * the webcam to work around the problem. | |
228 | * | |
229 | * The workaround could probably be enabled for all webcams, so the | |
230 | * quirk can be removed if needed. It's currently useful to detect | |
231 | * webcam bugs and fix them before they hit the market (providing | |
232 | * developers test their webcams with the Linux driver as well as with | |
233 | * the Windows driver). | |
234 | */ | |
6947756d | 235 | mutex_lock(&stream->mutex); |
35f02a68 | 236 | if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) |
c0efd232 | 237 | probe->dwMaxVideoFrameSize = |
35f02a68 | 238 | stream->ctrl.dwMaxVideoFrameSize; |
c0efd232 | 239 | |
2c2d264b | 240 | /* Probe the device. */ |
35f02a68 | 241 | ret = uvc_probe_video(stream, probe); |
6947756d | 242 | mutex_unlock(&stream->mutex); |
35f02a68 | 243 | if (ret < 0) |
c0efd232 LP |
244 | goto done; |
245 | ||
246 | fmt->fmt.pix.width = frame->wWidth; | |
247 | fmt->fmt.pix.height = frame->wHeight; | |
248 | fmt->fmt.pix.field = V4L2_FIELD_NONE; | |
249 | fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; | |
250 | fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; | |
251 | fmt->fmt.pix.colorspace = format->colorspace; | |
252 | fmt->fmt.pix.priv = 0; | |
253 | ||
254 | if (uvc_format != NULL) | |
255 | *uvc_format = format; | |
256 | if (uvc_frame != NULL) | |
257 | *uvc_frame = frame; | |
258 | ||
259 | done: | |
260 | return ret; | |
261 | } | |
262 | ||
35f02a68 | 263 | static int uvc_v4l2_get_format(struct uvc_streaming *stream, |
c0efd232 LP |
264 | struct v4l2_format *fmt) |
265 | { | |
6947756d LP |
266 | struct uvc_format *format; |
267 | struct uvc_frame *frame; | |
268 | int ret = 0; | |
c0efd232 | 269 | |
35f02a68 | 270 | if (fmt->type != stream->type) |
c0efd232 LP |
271 | return -EINVAL; |
272 | ||
6947756d LP |
273 | mutex_lock(&stream->mutex); |
274 | format = stream->cur_format; | |
275 | frame = stream->cur_frame; | |
276 | ||
277 | if (format == NULL || frame == NULL) { | |
278 | ret = -EINVAL; | |
279 | goto done; | |
280 | } | |
c0efd232 LP |
281 | |
282 | fmt->fmt.pix.pixelformat = format->fcc; | |
283 | fmt->fmt.pix.width = frame->wWidth; | |
284 | fmt->fmt.pix.height = frame->wHeight; | |
285 | fmt->fmt.pix.field = V4L2_FIELD_NONE; | |
286 | fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; | |
35f02a68 | 287 | fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; |
c0efd232 LP |
288 | fmt->fmt.pix.colorspace = format->colorspace; |
289 | fmt->fmt.pix.priv = 0; | |
290 | ||
6947756d LP |
291 | done: |
292 | mutex_unlock(&stream->mutex); | |
293 | return ret; | |
c0efd232 LP |
294 | } |
295 | ||
35f02a68 | 296 | static int uvc_v4l2_set_format(struct uvc_streaming *stream, |
c0efd232 LP |
297 | struct v4l2_format *fmt) |
298 | { | |
299 | struct uvc_streaming_control probe; | |
300 | struct uvc_format *format; | |
301 | struct uvc_frame *frame; | |
302 | int ret; | |
303 | ||
35f02a68 | 304 | if (fmt->type != stream->type) |
c0efd232 LP |
305 | return -EINVAL; |
306 | ||
35f02a68 | 307 | ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); |
c0efd232 LP |
308 | if (ret < 0) |
309 | return ret; | |
310 | ||
6947756d LP |
311 | mutex_lock(&stream->mutex); |
312 | ||
313 | if (uvc_queue_allocated(&stream->queue)) { | |
314 | ret = -EBUSY; | |
315 | goto done; | |
316 | } | |
317 | ||
8c0d44e2 | 318 | stream->ctrl = probe; |
35f02a68 LP |
319 | stream->cur_format = format; |
320 | stream->cur_frame = frame; | |
c0efd232 | 321 | |
6947756d LP |
322 | done: |
323 | mutex_unlock(&stream->mutex); | |
324 | return ret; | |
c0efd232 LP |
325 | } |
326 | ||
35f02a68 | 327 | static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, |
c0efd232 LP |
328 | struct v4l2_streamparm *parm) |
329 | { | |
330 | uint32_t numerator, denominator; | |
331 | ||
35f02a68 | 332 | if (parm->type != stream->type) |
c0efd232 LP |
333 | return -EINVAL; |
334 | ||
6947756d | 335 | mutex_lock(&stream->mutex); |
35f02a68 | 336 | numerator = stream->ctrl.dwFrameInterval; |
6947756d LP |
337 | mutex_unlock(&stream->mutex); |
338 | ||
c0efd232 LP |
339 | denominator = 10000000; |
340 | uvc_simplify_fraction(&numerator, &denominator, 8, 333); | |
341 | ||
342 | memset(parm, 0, sizeof *parm); | |
35f02a68 | 343 | parm->type = stream->type; |
ff924203 | 344 | |
35f02a68 | 345 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
ff924203 LP |
346 | parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
347 | parm->parm.capture.capturemode = 0; | |
348 | parm->parm.capture.timeperframe.numerator = numerator; | |
349 | parm->parm.capture.timeperframe.denominator = denominator; | |
350 | parm->parm.capture.extendedmode = 0; | |
351 | parm->parm.capture.readbuffers = 0; | |
352 | } else { | |
353 | parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | |
354 | parm->parm.output.outputmode = 0; | |
355 | parm->parm.output.timeperframe.numerator = numerator; | |
356 | parm->parm.output.timeperframe.denominator = denominator; | |
357 | } | |
c0efd232 LP |
358 | |
359 | return 0; | |
360 | } | |
361 | ||
35f02a68 | 362 | static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, |
c0efd232 LP |
363 | struct v4l2_streamparm *parm) |
364 | { | |
c0efd232 | 365 | struct uvc_streaming_control probe; |
ff924203 | 366 | struct v4l2_fract timeperframe; |
c0efd232 LP |
367 | uint32_t interval; |
368 | int ret; | |
369 | ||
35f02a68 | 370 | if (parm->type != stream->type) |
c0efd232 LP |
371 | return -EINVAL; |
372 | ||
ff924203 LP |
373 | if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
374 | timeperframe = parm->parm.capture.timeperframe; | |
375 | else | |
376 | timeperframe = parm->parm.output.timeperframe; | |
377 | ||
ff924203 LP |
378 | interval = uvc_fraction_to_interval(timeperframe.numerator, |
379 | timeperframe.denominator); | |
c0efd232 | 380 | uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", |
ff924203 | 381 | timeperframe.numerator, timeperframe.denominator, interval); |
6947756d LP |
382 | |
383 | mutex_lock(&stream->mutex); | |
384 | ||
385 | if (uvc_queue_streaming(&stream->queue)) { | |
386 | mutex_unlock(&stream->mutex); | |
387 | return -EBUSY; | |
388 | } | |
389 | ||
8c0d44e2 | 390 | probe = stream->ctrl; |
6947756d LP |
391 | probe.dwFrameInterval = |
392 | uvc_try_frame_interval(stream->cur_frame, interval); | |
c0efd232 LP |
393 | |
394 | /* Probe the device with the new settings. */ | |
35f02a68 | 395 | ret = uvc_probe_video(stream, &probe); |
6947756d LP |
396 | if (ret < 0) { |
397 | mutex_unlock(&stream->mutex); | |
c0efd232 | 398 | return ret; |
6947756d | 399 | } |
c0efd232 | 400 | |
8c0d44e2 | 401 | stream->ctrl = probe; |
6947756d | 402 | mutex_unlock(&stream->mutex); |
c0efd232 LP |
403 | |
404 | /* Return the actual frame period. */ | |
ff924203 LP |
405 | timeperframe.numerator = probe.dwFrameInterval; |
406 | timeperframe.denominator = 10000000; | |
407 | uvc_simplify_fraction(&timeperframe.numerator, | |
408 | &timeperframe.denominator, 8, 333); | |
409 | ||
410 | if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
411 | parm->parm.capture.timeperframe = timeperframe; | |
412 | else | |
413 | parm->parm.output.timeperframe = timeperframe; | |
c0efd232 LP |
414 | |
415 | return 0; | |
416 | } | |
417 | ||
418 | /* ------------------------------------------------------------------------ | |
419 | * Privilege management | |
420 | */ | |
421 | ||
422 | /* | |
423 | * Privilege management is the multiple-open implementation basis. The current | |
424 | * implementation is completely transparent for the end-user and doesn't | |
425 | * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. | |
426 | * Those ioctls enable finer control on the device (by making possible for a | |
427 | * user to request exclusive access to a device), but are not mature yet. | |
428 | * Switching to the V4L2 priority mechanism might be considered in the future | |
429 | * if this situation changes. | |
430 | * | |
431 | * Each open instance of a UVC device can either be in a privileged or | |
432 | * unprivileged state. Only a single instance can be in a privileged state at | |
2c2d264b | 433 | * a given time. Trying to perform an operation that requires privileges will |
c0efd232 | 434 | * automatically acquire the required privileges if possible, or return -EBUSY |
1a969d98 LP |
435 | * otherwise. Privileges are dismissed when closing the instance or when |
436 | * freeing the video buffers using VIDIOC_REQBUFS. | |
c0efd232 | 437 | * |
2c2d264b | 438 | * Operations that require privileges are: |
c0efd232 LP |
439 | * |
440 | * - VIDIOC_S_INPUT | |
441 | * - VIDIOC_S_PARM | |
442 | * - VIDIOC_S_FMT | |
c0efd232 LP |
443 | * - VIDIOC_REQBUFS |
444 | */ | |
445 | static int uvc_acquire_privileges(struct uvc_fh *handle) | |
446 | { | |
c0efd232 LP |
447 | /* Always succeed if the handle is already privileged. */ |
448 | if (handle->state == UVC_HANDLE_ACTIVE) | |
449 | return 0; | |
450 | ||
451 | /* Check if the device already has a privileged handle. */ | |
35f02a68 LP |
452 | if (atomic_inc_return(&handle->stream->active) != 1) { |
453 | atomic_dec(&handle->stream->active); | |
716fdee1 | 454 | return -EBUSY; |
c0efd232 LP |
455 | } |
456 | ||
457 | handle->state = UVC_HANDLE_ACTIVE; | |
716fdee1 | 458 | return 0; |
c0efd232 LP |
459 | } |
460 | ||
461 | static void uvc_dismiss_privileges(struct uvc_fh *handle) | |
462 | { | |
463 | if (handle->state == UVC_HANDLE_ACTIVE) | |
35f02a68 | 464 | atomic_dec(&handle->stream->active); |
c0efd232 LP |
465 | |
466 | handle->state = UVC_HANDLE_PASSIVE; | |
467 | } | |
468 | ||
469 | static int uvc_has_privileges(struct uvc_fh *handle) | |
470 | { | |
471 | return handle->state == UVC_HANDLE_ACTIVE; | |
472 | } | |
473 | ||
474 | /* ------------------------------------------------------------------------ | |
475 | * V4L2 file operations | |
476 | */ | |
477 | ||
bec43661 | 478 | static int uvc_v4l2_open(struct file *file) |
c0efd232 | 479 | { |
35f02a68 | 480 | struct uvc_streaming *stream; |
c0efd232 LP |
481 | struct uvc_fh *handle; |
482 | int ret = 0; | |
483 | ||
484 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); | |
35f02a68 | 485 | stream = video_drvdata(file); |
c0efd232 | 486 | |
716fdee1 LP |
487 | if (stream->dev->state & UVC_DEV_DISCONNECTED) |
488 | return -ENODEV; | |
c0efd232 | 489 | |
35f02a68 | 490 | ret = usb_autopm_get_interface(stream->dev->intf); |
c0efd232 | 491 | if (ret < 0) |
716fdee1 | 492 | return ret; |
c0efd232 LP |
493 | |
494 | /* Create the device handle. */ | |
495 | handle = kzalloc(sizeof *handle, GFP_KERNEL); | |
496 | if (handle == NULL) { | |
35f02a68 | 497 | usb_autopm_put_interface(stream->dev->intf); |
716fdee1 | 498 | return -ENOMEM; |
c0efd232 LP |
499 | } |
500 | ||
17706f56 LP |
501 | mutex_lock(&stream->dev->lock); |
502 | if (stream->dev->users == 0) { | |
503 | ret = uvc_status_start(stream->dev, GFP_KERNEL); | |
35f02a68 | 504 | if (ret < 0) { |
17706f56 | 505 | mutex_unlock(&stream->dev->lock); |
a82a45f6 | 506 | usb_autopm_put_interface(stream->dev->intf); |
04a37e0f | 507 | kfree(handle); |
716fdee1 | 508 | return ret; |
04a37e0f LP |
509 | } |
510 | } | |
511 | ||
17706f56 LP |
512 | stream->dev->users++; |
513 | mutex_unlock(&stream->dev->lock); | |
514 | ||
b4012002 HG |
515 | v4l2_fh_init(&handle->vfh, stream->vdev); |
516 | v4l2_fh_add(&handle->vfh); | |
8e113595 | 517 | handle->chain = stream->chain; |
35f02a68 | 518 | handle->stream = stream; |
c0efd232 LP |
519 | handle->state = UVC_HANDLE_PASSIVE; |
520 | file->private_data = handle; | |
521 | ||
716fdee1 | 522 | return 0; |
c0efd232 LP |
523 | } |
524 | ||
bec43661 | 525 | static int uvc_v4l2_release(struct file *file) |
c0efd232 | 526 | { |
abf84383 | 527 | struct uvc_fh *handle = file->private_data; |
35f02a68 | 528 | struct uvc_streaming *stream = handle->stream; |
c0efd232 LP |
529 | |
530 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); | |
531 | ||
532 | /* Only free resources if this is a privileged handle. */ | |
533 | if (uvc_has_privileges(handle)) { | |
35f02a68 | 534 | uvc_video_enable(stream, 0); |
6998b6fb | 535 | uvc_free_buffers(&stream->queue); |
c0efd232 LP |
536 | } |
537 | ||
538 | /* Release the file handle. */ | |
539 | uvc_dismiss_privileges(handle); | |
b4012002 HG |
540 | v4l2_fh_del(&handle->vfh); |
541 | v4l2_fh_exit(&handle->vfh); | |
c0efd232 LP |
542 | kfree(handle); |
543 | file->private_data = NULL; | |
544 | ||
17706f56 LP |
545 | mutex_lock(&stream->dev->lock); |
546 | if (--stream->dev->users == 0) | |
35f02a68 | 547 | uvc_status_stop(stream->dev); |
17706f56 | 548 | mutex_unlock(&stream->dev->lock); |
04a37e0f | 549 | |
35f02a68 | 550 | usb_autopm_put_interface(stream->dev->intf); |
c0efd232 LP |
551 | return 0; |
552 | } | |
553 | ||
069b7479 | 554 | static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) |
c0efd232 LP |
555 | { |
556 | struct video_device *vdev = video_devdata(file); | |
abf84383 | 557 | struct uvc_fh *handle = file->private_data; |
8e113595 | 558 | struct uvc_video_chain *chain = handle->chain; |
35f02a68 | 559 | struct uvc_streaming *stream = handle->stream; |
069b7479 | 560 | long ret = 0; |
c0efd232 | 561 | |
c0efd232 LP |
562 | switch (cmd) { |
563 | /* Query capabilities */ | |
564 | case VIDIOC_QUERYCAP: | |
565 | { | |
566 | struct v4l2_capability *cap = arg; | |
567 | ||
568 | memset(cap, 0, sizeof *cap); | |
d0ebf307 LP |
569 | strlcpy(cap->driver, "uvcvideo", sizeof cap->driver); |
570 | strlcpy(cap->card, vdev->name, sizeof cap->card); | |
35f02a68 | 571 | usb_make_path(stream->dev->udev, |
b12049a2 | 572 | cap->bus_info, sizeof(cap->bus_info)); |
fd3e5824 | 573 | cap->version = LINUX_VERSION_CODE; |
f887e99a LP |
574 | cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING |
575 | | chain->caps; | |
35f02a68 | 576 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
f887e99a LP |
577 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
578 | | V4L2_CAP_STREAMING; | |
ff924203 | 579 | else |
f887e99a LP |
580 | cap->device_caps = V4L2_CAP_VIDEO_OUTPUT |
581 | | V4L2_CAP_STREAMING; | |
c0efd232 LP |
582 | break; |
583 | } | |
584 | ||
0550513c LP |
585 | /* Priority */ |
586 | case VIDIOC_G_PRIORITY: | |
587 | *(u32 *)arg = v4l2_prio_max(vdev->prio); | |
588 | break; | |
589 | ||
590 | case VIDIOC_S_PRIORITY: | |
591 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); | |
592 | if (ret < 0) | |
593 | return ret; | |
594 | ||
595 | return v4l2_prio_change(vdev->prio, &handle->vfh.prio, | |
596 | *(u32 *)arg); | |
597 | ||
c0efd232 LP |
598 | /* Get, Set & Query control */ |
599 | case VIDIOC_QUERYCTRL: | |
8e113595 | 600 | return uvc_query_v4l2_ctrl(chain, arg); |
c0efd232 LP |
601 | |
602 | case VIDIOC_G_CTRL: | |
603 | { | |
604 | struct v4l2_control *ctrl = arg; | |
605 | struct v4l2_ext_control xctrl; | |
606 | ||
607 | memset(&xctrl, 0, sizeof xctrl); | |
608 | xctrl.id = ctrl->id; | |
609 | ||
8e113595 LP |
610 | ret = uvc_ctrl_begin(chain); |
611 | if (ret < 0) | |
1fcbcc47 RK |
612 | return ret; |
613 | ||
8e113595 | 614 | ret = uvc_ctrl_get(chain, &xctrl); |
b4012002 | 615 | uvc_ctrl_rollback(handle); |
9c016d61 RW |
616 | if (ret >= 0) |
617 | ctrl->value = xctrl.value; | |
c0efd232 LP |
618 | break; |
619 | } | |
620 | ||
621 | case VIDIOC_S_CTRL: | |
622 | { | |
623 | struct v4l2_control *ctrl = arg; | |
624 | struct v4l2_ext_control xctrl; | |
625 | ||
0550513c LP |
626 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
627 | if (ret < 0) | |
628 | return ret; | |
629 | ||
c0efd232 LP |
630 | memset(&xctrl, 0, sizeof xctrl); |
631 | xctrl.id = ctrl->id; | |
632 | xctrl.value = ctrl->value; | |
633 | ||
8d556625 | 634 | ret = uvc_ctrl_begin(chain); |
8e113595 | 635 | if (ret < 0) |
1fcbcc47 RK |
636 | return ret; |
637 | ||
8e113595 | 638 | ret = uvc_ctrl_set(chain, &xctrl); |
c0efd232 | 639 | if (ret < 0) { |
b4012002 | 640 | uvc_ctrl_rollback(handle); |
9c016d61 | 641 | return ret; |
c0efd232 | 642 | } |
b4012002 | 643 | ret = uvc_ctrl_commit(handle, &xctrl, 1); |
e54532e5 LP |
644 | if (ret == 0) |
645 | ctrl->value = xctrl.value; | |
c0efd232 LP |
646 | break; |
647 | } | |
648 | ||
649 | case VIDIOC_QUERYMENU: | |
23d9f3ef | 650 | return uvc_query_v4l2_menu(chain, arg); |
c0efd232 LP |
651 | |
652 | case VIDIOC_G_EXT_CTRLS: | |
653 | { | |
654 | struct v4l2_ext_controls *ctrls = arg; | |
655 | struct v4l2_ext_control *ctrl = ctrls->controls; | |
656 | unsigned int i; | |
657 | ||
8e113595 LP |
658 | ret = uvc_ctrl_begin(chain); |
659 | if (ret < 0) | |
1fcbcc47 RK |
660 | return ret; |
661 | ||
c0efd232 | 662 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { |
8e113595 | 663 | ret = uvc_ctrl_get(chain, ctrl); |
c0efd232 | 664 | if (ret < 0) { |
b4012002 | 665 | uvc_ctrl_rollback(handle); |
29005c09 | 666 | ctrls->error_idx = i; |
9c016d61 | 667 | return ret; |
c0efd232 LP |
668 | } |
669 | } | |
670 | ctrls->error_idx = 0; | |
b4012002 | 671 | ret = uvc_ctrl_rollback(handle); |
c0efd232 LP |
672 | break; |
673 | } | |
674 | ||
675 | case VIDIOC_S_EXT_CTRLS: | |
0550513c LP |
676 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
677 | if (ret < 0) | |
678 | return ret; | |
679 | /* Fall through */ | |
c0efd232 LP |
680 | case VIDIOC_TRY_EXT_CTRLS: |
681 | { | |
682 | struct v4l2_ext_controls *ctrls = arg; | |
683 | struct v4l2_ext_control *ctrl = ctrls->controls; | |
684 | unsigned int i; | |
685 | ||
8e113595 | 686 | ret = uvc_ctrl_begin(chain); |
c0efd232 LP |
687 | if (ret < 0) |
688 | return ret; | |
689 | ||
690 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { | |
8e113595 | 691 | ret = uvc_ctrl_set(chain, ctrl); |
c0efd232 | 692 | if (ret < 0) { |
b4012002 | 693 | uvc_ctrl_rollback(handle); |
68d6f84b LP |
694 | ctrls->error_idx = cmd == VIDIOC_S_EXT_CTRLS |
695 | ? ctrls->count : i; | |
9c016d61 | 696 | return ret; |
c0efd232 LP |
697 | } |
698 | } | |
699 | ||
700 | ctrls->error_idx = 0; | |
701 | ||
702 | if (cmd == VIDIOC_S_EXT_CTRLS) | |
b4012002 HG |
703 | ret = uvc_ctrl_commit(handle, |
704 | ctrls->controls, ctrls->count); | |
c0efd232 | 705 | else |
b4012002 | 706 | ret = uvc_ctrl_rollback(handle); |
c0efd232 LP |
707 | break; |
708 | } | |
709 | ||
710 | /* Get, Set & Enum input */ | |
711 | case VIDIOC_ENUMINPUT: | |
712 | { | |
8e113595 | 713 | const struct uvc_entity *selector = chain->selector; |
c0efd232 LP |
714 | struct v4l2_input *input = arg; |
715 | struct uvc_entity *iterm = NULL; | |
716 | u32 index = input->index; | |
717 | int pin = 0; | |
718 | ||
719 | if (selector == NULL || | |
8e113595 | 720 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { |
c0efd232 LP |
721 | if (index != 0) |
722 | return -EINVAL; | |
6241d8ca LP |
723 | list_for_each_entry(iterm, &chain->entities, chain) { |
724 | if (UVC_ENTITY_IS_ITERM(iterm)) | |
725 | break; | |
726 | } | |
c0efd232 | 727 | pin = iterm->id; |
31c5f0c5 | 728 | } else if (index < selector->bNrInPins) { |
8ca5a639 | 729 | pin = selector->baSourceID[index]; |
6241d8ca LP |
730 | list_for_each_entry(iterm, &chain->entities, chain) { |
731 | if (!UVC_ENTITY_IS_ITERM(iterm)) | |
732 | continue; | |
c0efd232 LP |
733 | if (iterm->id == pin) |
734 | break; | |
735 | } | |
736 | } | |
737 | ||
738 | if (iterm == NULL || iterm->id != pin) | |
739 | return -EINVAL; | |
740 | ||
741 | memset(input, 0, sizeof *input); | |
742 | input->index = index; | |
d0ebf307 | 743 | strlcpy(input->name, iterm->name, sizeof input->name); |
b482d923 | 744 | if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) |
c0efd232 LP |
745 | input->type = V4L2_INPUT_TYPE_CAMERA; |
746 | break; | |
747 | } | |
748 | ||
749 | case VIDIOC_G_INPUT: | |
750 | { | |
751 | u8 input; | |
752 | ||
8e113595 LP |
753 | if (chain->selector == NULL || |
754 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
c0efd232 LP |
755 | *(int *)arg = 0; |
756 | break; | |
757 | } | |
758 | ||
8e113595 LP |
759 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
760 | chain->selector->id, chain->dev->intfnum, | |
b482d923 | 761 | UVC_SU_INPUT_SELECT_CONTROL, &input, 1); |
c0efd232 LP |
762 | if (ret < 0) |
763 | return ret; | |
764 | ||
765 | *(int *)arg = input - 1; | |
766 | break; | |
767 | } | |
768 | ||
769 | case VIDIOC_S_INPUT: | |
770 | { | |
9086c7b9 | 771 | u32 input = *(u32 *)arg + 1; |
c0efd232 | 772 | |
0550513c LP |
773 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
774 | if (ret < 0) | |
775 | return ret; | |
776 | ||
c0efd232 LP |
777 | if ((ret = uvc_acquire_privileges(handle)) < 0) |
778 | return ret; | |
779 | ||
8e113595 LP |
780 | if (chain->selector == NULL || |
781 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
c0efd232 LP |
782 | if (input != 1) |
783 | return -EINVAL; | |
784 | break; | |
785 | } | |
786 | ||
8ca5a639 | 787 | if (input == 0 || input > chain->selector->bNrInPins) |
c0efd232 LP |
788 | return -EINVAL; |
789 | ||
8e113595 LP |
790 | return uvc_query_ctrl(chain->dev, UVC_SET_CUR, |
791 | chain->selector->id, chain->dev->intfnum, | |
b482d923 | 792 | UVC_SU_INPUT_SELECT_CONTROL, &input, 1); |
c0efd232 LP |
793 | } |
794 | ||
795 | /* Try, Get, Set & Enum format */ | |
796 | case VIDIOC_ENUM_FMT: | |
797 | { | |
798 | struct v4l2_fmtdesc *fmt = arg; | |
799 | struct uvc_format *format; | |
8bbd90ce MN |
800 | enum v4l2_buf_type type = fmt->type; |
801 | __u32 index = fmt->index; | |
c0efd232 | 802 | |
35f02a68 LP |
803 | if (fmt->type != stream->type || |
804 | fmt->index >= stream->nformats) | |
c0efd232 LP |
805 | return -EINVAL; |
806 | ||
8bbd90ce MN |
807 | memset(fmt, 0, sizeof(*fmt)); |
808 | fmt->index = index; | |
809 | fmt->type = type; | |
810 | ||
35f02a68 | 811 | format = &stream->format[fmt->index]; |
c0efd232 LP |
812 | fmt->flags = 0; |
813 | if (format->flags & UVC_FMT_FLAG_COMPRESSED) | |
814 | fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; | |
d0ebf307 | 815 | strlcpy(fmt->description, format->name, |
c0efd232 LP |
816 | sizeof fmt->description); |
817 | fmt->description[sizeof fmt->description - 1] = 0; | |
818 | fmt->pixelformat = format->fcc; | |
819 | break; | |
820 | } | |
821 | ||
822 | case VIDIOC_TRY_FMT: | |
823 | { | |
824 | struct uvc_streaming_control probe; | |
825 | ||
35f02a68 | 826 | return uvc_v4l2_try_format(stream, arg, &probe, NULL, NULL); |
c0efd232 LP |
827 | } |
828 | ||
829 | case VIDIOC_S_FMT: | |
0550513c LP |
830 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
831 | if (ret < 0) | |
832 | return ret; | |
833 | ||
c0efd232 LP |
834 | if ((ret = uvc_acquire_privileges(handle)) < 0) |
835 | return ret; | |
836 | ||
35f02a68 | 837 | return uvc_v4l2_set_format(stream, arg); |
c0efd232 LP |
838 | |
839 | case VIDIOC_G_FMT: | |
35f02a68 | 840 | return uvc_v4l2_get_format(stream, arg); |
c0efd232 LP |
841 | |
842 | /* Frame size enumeration */ | |
843 | case VIDIOC_ENUM_FRAMESIZES: | |
844 | { | |
845 | struct v4l2_frmsizeenum *fsize = arg; | |
846 | struct uvc_format *format = NULL; | |
847 | struct uvc_frame *frame; | |
848 | int i; | |
849 | ||
850 | /* Look for the given pixel format */ | |
35f02a68 LP |
851 | for (i = 0; i < stream->nformats; i++) { |
852 | if (stream->format[i].fcc == | |
c0efd232 | 853 | fsize->pixel_format) { |
35f02a68 | 854 | format = &stream->format[i]; |
c0efd232 LP |
855 | break; |
856 | } | |
857 | } | |
858 | if (format == NULL) | |
859 | return -EINVAL; | |
860 | ||
861 | if (fsize->index >= format->nframes) | |
862 | return -EINVAL; | |
863 | ||
864 | frame = &format->frame[fsize->index]; | |
865 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
866 | fsize->discrete.width = frame->wWidth; | |
867 | fsize->discrete.height = frame->wHeight; | |
868 | break; | |
869 | } | |
870 | ||
871 | /* Frame interval enumeration */ | |
872 | case VIDIOC_ENUM_FRAMEINTERVALS: | |
873 | { | |
874 | struct v4l2_frmivalenum *fival = arg; | |
875 | struct uvc_format *format = NULL; | |
876 | struct uvc_frame *frame = NULL; | |
877 | int i; | |
878 | ||
879 | /* Look for the given pixel format and frame size */ | |
35f02a68 LP |
880 | for (i = 0; i < stream->nformats; i++) { |
881 | if (stream->format[i].fcc == | |
c0efd232 | 882 | fival->pixel_format) { |
35f02a68 | 883 | format = &stream->format[i]; |
c0efd232 LP |
884 | break; |
885 | } | |
886 | } | |
887 | if (format == NULL) | |
888 | return -EINVAL; | |
889 | ||
890 | for (i = 0; i < format->nframes; i++) { | |
891 | if (format->frame[i].wWidth == fival->width && | |
892 | format->frame[i].wHeight == fival->height) { | |
893 | frame = &format->frame[i]; | |
894 | break; | |
895 | } | |
896 | } | |
897 | if (frame == NULL) | |
898 | return -EINVAL; | |
899 | ||
900 | if (frame->bFrameIntervalType) { | |
901 | if (fival->index >= frame->bFrameIntervalType) | |
902 | return -EINVAL; | |
903 | ||
904 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; | |
905 | fival->discrete.numerator = | |
906 | frame->dwFrameInterval[fival->index]; | |
907 | fival->discrete.denominator = 10000000; | |
908 | uvc_simplify_fraction(&fival->discrete.numerator, | |
909 | &fival->discrete.denominator, 8, 333); | |
910 | } else { | |
911 | fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; | |
912 | fival->stepwise.min.numerator = | |
913 | frame->dwFrameInterval[0]; | |
914 | fival->stepwise.min.denominator = 10000000; | |
915 | fival->stepwise.max.numerator = | |
916 | frame->dwFrameInterval[1]; | |
917 | fival->stepwise.max.denominator = 10000000; | |
918 | fival->stepwise.step.numerator = | |
919 | frame->dwFrameInterval[2]; | |
920 | fival->stepwise.step.denominator = 10000000; | |
921 | uvc_simplify_fraction(&fival->stepwise.min.numerator, | |
922 | &fival->stepwise.min.denominator, 8, 333); | |
923 | uvc_simplify_fraction(&fival->stepwise.max.numerator, | |
924 | &fival->stepwise.max.denominator, 8, 333); | |
925 | uvc_simplify_fraction(&fival->stepwise.step.numerator, | |
926 | &fival->stepwise.step.denominator, 8, 333); | |
927 | } | |
928 | break; | |
929 | } | |
930 | ||
931 | /* Get & Set streaming parameters */ | |
932 | case VIDIOC_G_PARM: | |
35f02a68 | 933 | return uvc_v4l2_get_streamparm(stream, arg); |
c0efd232 LP |
934 | |
935 | case VIDIOC_S_PARM: | |
0550513c LP |
936 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
937 | if (ret < 0) | |
938 | return ret; | |
939 | ||
c0efd232 LP |
940 | if ((ret = uvc_acquire_privileges(handle)) < 0) |
941 | return ret; | |
942 | ||
35f02a68 | 943 | return uvc_v4l2_set_streamparm(stream, arg); |
c0efd232 LP |
944 | |
945 | /* Cropping and scaling */ | |
946 | case VIDIOC_CROPCAP: | |
947 | { | |
948 | struct v4l2_cropcap *ccap = arg; | |
c0efd232 | 949 | |
35f02a68 | 950 | if (ccap->type != stream->type) |
c0efd232 LP |
951 | return -EINVAL; |
952 | ||
953 | ccap->bounds.left = 0; | |
954 | ccap->bounds.top = 0; | |
6947756d LP |
955 | |
956 | mutex_lock(&stream->mutex); | |
957 | ccap->bounds.width = stream->cur_frame->wWidth; | |
958 | ccap->bounds.height = stream->cur_frame->wHeight; | |
959 | mutex_unlock(&stream->mutex); | |
c0efd232 LP |
960 | |
961 | ccap->defrect = ccap->bounds; | |
962 | ||
963 | ccap->pixelaspect.numerator = 1; | |
964 | ccap->pixelaspect.denominator = 1; | |
965 | break; | |
966 | } | |
967 | ||
968 | case VIDIOC_G_CROP: | |
969 | case VIDIOC_S_CROP: | |
69d11262 | 970 | return -ENOTTY; |
c0efd232 LP |
971 | |
972 | /* Buffers & streaming */ | |
973 | case VIDIOC_REQBUFS: | |
0550513c LP |
974 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
975 | if (ret < 0) | |
976 | return ret; | |
977 | ||
c0efd232 LP |
978 | if ((ret = uvc_acquire_privileges(handle)) < 0) |
979 | return ret; | |
980 | ||
6947756d | 981 | mutex_lock(&stream->mutex); |
6998b6fb | 982 | ret = uvc_alloc_buffers(&stream->queue, arg); |
6947756d | 983 | mutex_unlock(&stream->mutex); |
c0efd232 LP |
984 | if (ret < 0) |
985 | return ret; | |
986 | ||
1a969d98 LP |
987 | if (ret == 0) |
988 | uvc_dismiss_privileges(handle); | |
989 | ||
c0efd232 LP |
990 | ret = 0; |
991 | break; | |
c0efd232 LP |
992 | |
993 | case VIDIOC_QUERYBUF: | |
994 | { | |
995 | struct v4l2_buffer *buf = arg; | |
996 | ||
c0efd232 LP |
997 | if (!uvc_has_privileges(handle)) |
998 | return -EBUSY; | |
999 | ||
35f02a68 | 1000 | return uvc_query_buffer(&stream->queue, buf); |
c0efd232 LP |
1001 | } |
1002 | ||
6e9179e2 PZ |
1003 | case VIDIOC_CREATE_BUFS: |
1004 | { | |
1005 | struct v4l2_create_buffers *cb = arg; | |
1006 | ||
1007 | ret = uvc_acquire_privileges(handle); | |
1008 | if (ret < 0) | |
1009 | return ret; | |
1010 | ||
1011 | return uvc_create_buffers(&stream->queue, cb); | |
1012 | } | |
1013 | ||
c0efd232 LP |
1014 | case VIDIOC_QBUF: |
1015 | if (!uvc_has_privileges(handle)) | |
1016 | return -EBUSY; | |
1017 | ||
35f02a68 | 1018 | return uvc_queue_buffer(&stream->queue, arg); |
c0efd232 LP |
1019 | |
1020 | case VIDIOC_DQBUF: | |
1021 | if (!uvc_has_privileges(handle)) | |
1022 | return -EBUSY; | |
1023 | ||
35f02a68 | 1024 | return uvc_dequeue_buffer(&stream->queue, arg, |
c0efd232 LP |
1025 | file->f_flags & O_NONBLOCK); |
1026 | ||
1027 | case VIDIOC_STREAMON: | |
1028 | { | |
1029 | int *type = arg; | |
1030 | ||
35f02a68 | 1031 | if (*type != stream->type) |
c0efd232 LP |
1032 | return -EINVAL; |
1033 | ||
0550513c LP |
1034 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
1035 | if (ret < 0) | |
1036 | return ret; | |
1037 | ||
c0efd232 LP |
1038 | if (!uvc_has_privileges(handle)) |
1039 | return -EBUSY; | |
1040 | ||
6947756d | 1041 | mutex_lock(&stream->mutex); |
35f02a68 | 1042 | ret = uvc_video_enable(stream, 1); |
6947756d | 1043 | mutex_unlock(&stream->mutex); |
35f02a68 | 1044 | if (ret < 0) |
c0efd232 LP |
1045 | return ret; |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | case VIDIOC_STREAMOFF: | |
1050 | { | |
1051 | int *type = arg; | |
1052 | ||
35f02a68 | 1053 | if (*type != stream->type) |
c0efd232 LP |
1054 | return -EINVAL; |
1055 | ||
0550513c LP |
1056 | ret = v4l2_prio_check(vdev->prio, handle->vfh.prio); |
1057 | if (ret < 0) | |
1058 | return ret; | |
1059 | ||
c0efd232 LP |
1060 | if (!uvc_has_privileges(handle)) |
1061 | return -EBUSY; | |
1062 | ||
35f02a68 | 1063 | return uvc_video_enable(stream, 0); |
c0efd232 LP |
1064 | } |
1065 | ||
b4012002 HG |
1066 | case VIDIOC_SUBSCRIBE_EVENT: |
1067 | { | |
1068 | struct v4l2_event_subscription *sub = arg; | |
1069 | ||
1070 | switch (sub->type) { | |
1071 | case V4L2_EVENT_CTRL: | |
1072 | return v4l2_event_subscribe(&handle->vfh, sub, 0, | |
1073 | &uvc_ctrl_sub_ev_ops); | |
1074 | default: | |
1075 | return -EINVAL; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | case VIDIOC_UNSUBSCRIBE_EVENT: | |
1080 | return v4l2_event_unsubscribe(&handle->vfh, arg); | |
1081 | ||
1082 | case VIDIOC_DQEVENT: | |
1083 | return v4l2_event_dequeue(&handle->vfh, arg, | |
1084 | file->f_flags & O_NONBLOCK); | |
1085 | ||
c0efd232 LP |
1086 | /* Analog video standards make no sense for digital cameras. */ |
1087 | case VIDIOC_ENUMSTD: | |
1088 | case VIDIOC_QUERYSTD: | |
1089 | case VIDIOC_G_STD: | |
1090 | case VIDIOC_S_STD: | |
1091 | ||
1092 | case VIDIOC_OVERLAY: | |
1093 | ||
1094 | case VIDIOC_ENUMAUDIO: | |
1095 | case VIDIOC_ENUMAUDOUT: | |
1096 | ||
1097 | case VIDIOC_ENUMOUTPUT: | |
1098 | uvc_trace(UVC_TRACE_IOCTL, "Unsupported ioctl 0x%08x\n", cmd); | |
69d11262 | 1099 | return -ENOTTY; |
c0efd232 | 1100 | |
c0efd232 | 1101 | case UVCIOC_CTRL_MAP: |
227bd5b3 | 1102 | return uvc_ioctl_ctrl_map(chain, arg); |
fe78d187 MR |
1103 | |
1104 | case UVCIOC_CTRL_QUERY: | |
1105 | return uvc_xu_ctrl_query(chain, arg); | |
c0efd232 LP |
1106 | |
1107 | default: | |
08af245d | 1108 | uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", cmd); |
a3ec69b7 | 1109 | return -ENOTTY; |
c0efd232 LP |
1110 | } |
1111 | ||
1112 | return ret; | |
1113 | } | |
1114 | ||
069b7479 | 1115 | static long uvc_v4l2_ioctl(struct file *file, |
c0efd232 LP |
1116 | unsigned int cmd, unsigned long arg) |
1117 | { | |
308bb52c LP |
1118 | if (uvc_trace_param & UVC_TRACE_IOCTL) { |
1119 | uvc_printk(KERN_DEBUG, "uvc_v4l2_ioctl("); | |
4a085168 | 1120 | v4l_printk_ioctl(NULL, cmd); |
308bb52c LP |
1121 | printk(")\n"); |
1122 | } | |
1123 | ||
f473bf76 | 1124 | return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl); |
c0efd232 LP |
1125 | } |
1126 | ||
1a5e4c86 LP |
1127 | #ifdef CONFIG_COMPAT |
1128 | struct uvc_xu_control_mapping32 { | |
1129 | __u32 id; | |
1130 | __u8 name[32]; | |
1131 | __u8 entity[16]; | |
1132 | __u8 selector; | |
1133 | ||
1134 | __u8 size; | |
1135 | __u8 offset; | |
1136 | __u32 v4l2_type; | |
1137 | __u32 data_type; | |
1138 | ||
1139 | compat_caddr_t menu_info; | |
1140 | __u32 menu_count; | |
1141 | ||
1142 | __u32 reserved[4]; | |
1143 | }; | |
1144 | ||
1145 | static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp, | |
1146 | const struct uvc_xu_control_mapping32 __user *up) | |
1147 | { | |
1148 | struct uvc_menu_info __user *umenus; | |
1149 | struct uvc_menu_info __user *kmenus; | |
1150 | compat_caddr_t p; | |
1151 | ||
1152 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
1153 | __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) || | |
1154 | __get_user(kp->menu_count, &up->menu_count)) | |
1155 | return -EFAULT; | |
1156 | ||
1157 | memset(kp->reserved, 0, sizeof(kp->reserved)); | |
1158 | ||
1159 | if (kp->menu_count == 0) { | |
1160 | kp->menu_info = NULL; | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | if (__get_user(p, &up->menu_info)) | |
1165 | return -EFAULT; | |
1166 | umenus = compat_ptr(p); | |
1167 | if (!access_ok(VERIFY_READ, umenus, kp->menu_count * sizeof(*umenus))) | |
1168 | return -EFAULT; | |
1169 | ||
1170 | kmenus = compat_alloc_user_space(kp->menu_count * sizeof(*kmenus)); | |
1171 | if (kmenus == NULL) | |
1172 | return -EFAULT; | |
1173 | kp->menu_info = kmenus; | |
1174 | ||
1175 | if (copy_in_user(kmenus, umenus, kp->menu_count * sizeof(*umenus))) | |
1176 | return -EFAULT; | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp, | |
1182 | struct uvc_xu_control_mapping32 __user *up) | |
1183 | { | |
1184 | struct uvc_menu_info __user *umenus; | |
1185 | struct uvc_menu_info __user *kmenus = kp->menu_info; | |
1186 | compat_caddr_t p; | |
1187 | ||
1188 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
1189 | __copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) || | |
1190 | __put_user(kp->menu_count, &up->menu_count)) | |
1191 | return -EFAULT; | |
1192 | ||
57fb4a48 HG |
1193 | if (__clear_user(up->reserved, sizeof(up->reserved))) |
1194 | return -EFAULT; | |
1a5e4c86 LP |
1195 | |
1196 | if (kp->menu_count == 0) | |
1197 | return 0; | |
1198 | ||
1199 | if (get_user(p, &up->menu_info)) | |
1200 | return -EFAULT; | |
1201 | umenus = compat_ptr(p); | |
1a5e4c86 LP |
1202 | |
1203 | if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus))) | |
1204 | return -EFAULT; | |
1205 | ||
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | struct uvc_xu_control_query32 { | |
1210 | __u8 unit; | |
1211 | __u8 selector; | |
1212 | __u8 query; | |
1213 | __u16 size; | |
1214 | compat_caddr_t data; | |
1215 | }; | |
1216 | ||
1217 | static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp, | |
1218 | const struct uvc_xu_control_query32 __user *up) | |
1219 | { | |
1220 | u8 __user *udata; | |
1221 | u8 __user *kdata; | |
1222 | compat_caddr_t p; | |
1223 | ||
1224 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
1225 | __copy_from_user(kp, up, offsetof(typeof(*up), data))) | |
1226 | return -EFAULT; | |
1227 | ||
1228 | if (kp->size == 0) { | |
1229 | kp->data = NULL; | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | if (__get_user(p, &up->data)) | |
1234 | return -EFAULT; | |
1235 | udata = compat_ptr(p); | |
1236 | if (!access_ok(VERIFY_READ, udata, kp->size)) | |
1237 | return -EFAULT; | |
1238 | ||
1239 | kdata = compat_alloc_user_space(kp->size); | |
1240 | if (kdata == NULL) | |
1241 | return -EFAULT; | |
1242 | kp->data = kdata; | |
1243 | ||
1244 | if (copy_in_user(kdata, udata, kp->size)) | |
1245 | return -EFAULT; | |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp, | |
1251 | struct uvc_xu_control_query32 __user *up) | |
1252 | { | |
1253 | u8 __user *udata; | |
1254 | u8 __user *kdata = kp->data; | |
1255 | compat_caddr_t p; | |
1256 | ||
1257 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
1258 | __copy_to_user(up, kp, offsetof(typeof(*up), data))) | |
1259 | return -EFAULT; | |
1260 | ||
1261 | if (kp->size == 0) | |
1262 | return 0; | |
1263 | ||
1264 | if (get_user(p, &up->data)) | |
1265 | return -EFAULT; | |
1266 | udata = compat_ptr(p); | |
1267 | if (!access_ok(VERIFY_READ, udata, kp->size)) | |
1268 | return -EFAULT; | |
1269 | ||
1270 | if (copy_in_user(udata, kdata, kp->size)) | |
1271 | return -EFAULT; | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | #define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32) | |
1277 | #define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32) | |
1278 | ||
1279 | static long uvc_v4l2_compat_ioctl32(struct file *file, | |
1280 | unsigned int cmd, unsigned long arg) | |
1281 | { | |
1282 | union { | |
1283 | struct uvc_xu_control_mapping xmap; | |
1284 | struct uvc_xu_control_query xqry; | |
1285 | } karg; | |
1286 | void __user *up = compat_ptr(arg); | |
1287 | mm_segment_t old_fs; | |
1288 | long ret; | |
1289 | ||
1290 | switch (cmd) { | |
1291 | case UVCIOC_CTRL_MAP32: | |
1292 | cmd = UVCIOC_CTRL_MAP; | |
1293 | ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up); | |
1294 | break; | |
1295 | ||
1296 | case UVCIOC_CTRL_QUERY32: | |
1297 | cmd = UVCIOC_CTRL_QUERY; | |
1298 | ret = uvc_v4l2_get_xu_query(&karg.xqry, up); | |
1299 | break; | |
1300 | ||
1301 | default: | |
1302 | return -ENOIOCTLCMD; | |
1303 | } | |
1304 | ||
1305 | old_fs = get_fs(); | |
1306 | set_fs(KERNEL_DS); | |
1307 | ret = uvc_v4l2_ioctl(file, cmd, (unsigned long)&karg); | |
1308 | set_fs(old_fs); | |
1309 | ||
1310 | if (ret < 0) | |
1311 | return ret; | |
1312 | ||
1313 | switch (cmd) { | |
1314 | case UVCIOC_CTRL_MAP: | |
1315 | ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up); | |
1316 | break; | |
1317 | ||
1318 | case UVCIOC_CTRL_QUERY: | |
1319 | ret = uvc_v4l2_put_xu_query(&karg.xqry, up); | |
1320 | break; | |
1321 | } | |
1322 | ||
1323 | return ret; | |
1324 | } | |
1325 | #endif | |
1326 | ||
c0efd232 LP |
1327 | static ssize_t uvc_v4l2_read(struct file *file, char __user *data, |
1328 | size_t count, loff_t *ppos) | |
1329 | { | |
1330 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); | |
350d6407 | 1331 | return -EINVAL; |
c0efd232 LP |
1332 | } |
1333 | ||
c0efd232 LP |
1334 | static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) |
1335 | { | |
abf84383 | 1336 | struct uvc_fh *handle = file->private_data; |
35f02a68 | 1337 | struct uvc_streaming *stream = handle->stream; |
c0efd232 LP |
1338 | |
1339 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); | |
1340 | ||
4aa27597 | 1341 | return uvc_queue_mmap(&stream->queue, vma); |
c0efd232 LP |
1342 | } |
1343 | ||
1344 | static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) | |
1345 | { | |
abf84383 | 1346 | struct uvc_fh *handle = file->private_data; |
35f02a68 | 1347 | struct uvc_streaming *stream = handle->stream; |
c0efd232 LP |
1348 | |
1349 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); | |
1350 | ||
35f02a68 | 1351 | return uvc_queue_poll(&stream->queue, file, wait); |
c0efd232 LP |
1352 | } |
1353 | ||
72969447 BL |
1354 | #ifndef CONFIG_MMU |
1355 | static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, | |
1356 | unsigned long addr, unsigned long len, unsigned long pgoff, | |
1357 | unsigned long flags) | |
1358 | { | |
1359 | struct uvc_fh *handle = file->private_data; | |
1360 | struct uvc_streaming *stream = handle->stream; | |
1361 | ||
1362 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); | |
1363 | ||
1364 | return uvc_queue_get_unmapped_area(&stream->queue, pgoff); | |
1365 | } | |
1366 | #endif | |
1367 | ||
bec43661 | 1368 | const struct v4l2_file_operations uvc_fops = { |
c0efd232 LP |
1369 | .owner = THIS_MODULE, |
1370 | .open = uvc_v4l2_open, | |
1371 | .release = uvc_v4l2_release, | |
673eb9ff | 1372 | .unlocked_ioctl = uvc_v4l2_ioctl, |
1a5e4c86 LP |
1373 | #ifdef CONFIG_COMPAT |
1374 | .compat_ioctl32 = uvc_v4l2_compat_ioctl32, | |
1375 | #endif | |
c0efd232 LP |
1376 | .read = uvc_v4l2_read, |
1377 | .mmap = uvc_v4l2_mmap, | |
1378 | .poll = uvc_v4l2_poll, | |
72969447 BL |
1379 | #ifndef CONFIG_MMU |
1380 | .get_unmapped_area = uvc_v4l2_get_unmapped_area, | |
1381 | #endif | |
c0efd232 | 1382 | }; |
f87086e3 | 1383 |