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)) { | |
b83bba24 | 534 | uvc_queue_enable(&stream->queue, 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 | ||
d5e90b7a LP |
554 | static int uvc_ioctl_querycap(struct file *file, void *fh, |
555 | struct v4l2_capability *cap) | |
c0efd232 LP |
556 | { |
557 | struct video_device *vdev = video_devdata(file); | |
abf84383 | 558 | struct uvc_fh *handle = file->private_data; |
8e113595 | 559 | struct uvc_video_chain *chain = handle->chain; |
35f02a68 | 560 | struct uvc_streaming *stream = handle->stream; |
c0efd232 | 561 | |
d5e90b7a LP |
562 | strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver)); |
563 | strlcpy(cap->card, vdev->name, sizeof(cap->card)); | |
564 | usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info)); | |
565 | cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING | |
566 | | chain->caps; | |
567 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
568 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
569 | else | |
570 | cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; | |
c0efd232 | 571 | |
d5e90b7a LP |
572 | return 0; |
573 | } | |
0550513c | 574 | |
d5e90b7a LP |
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; | |
0550513c | 581 | |
d5e90b7a LP |
582 | if (fmt->type != stream->type || fmt->index >= stream->nformats) |
583 | return -EINVAL; | |
0550513c | 584 | |
d5e90b7a LP |
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 | } | |
c0efd232 | 598 | |
d5e90b7a LP |
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; | |
c0efd232 | 604 | |
d5e90b7a LP |
605 | return uvc_ioctl_enum_fmt(stream, fmt); |
606 | } | |
c0efd232 | 607 | |
d5e90b7a LP |
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; | |
1fcbcc47 | 613 | |
d5e90b7a LP |
614 | return uvc_ioctl_enum_fmt(stream, fmt); |
615 | } | |
c0efd232 | 616 | |
d5e90b7a LP |
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; | |
c0efd232 | 622 | |
d5e90b7a LP |
623 | return uvc_v4l2_get_format(stream, fmt); |
624 | } | |
0550513c | 625 | |
d5e90b7a LP |
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; | |
c0efd232 | 631 | |
d5e90b7a LP |
632 | return uvc_v4l2_get_format(stream, fmt); |
633 | } | |
1fcbcc47 | 634 | |
d5e90b7a LP |
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; | |
c0efd232 | 641 | |
d5e90b7a LP |
642 | ret = uvc_acquire_privileges(handle); |
643 | if (ret < 0) | |
644 | return ret; | |
c0efd232 | 645 | |
d5e90b7a LP |
646 | return uvc_v4l2_set_format(stream, fmt); |
647 | } | |
c0efd232 | 648 | |
d5e90b7a LP |
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; | |
1fcbcc47 | 655 | |
d5e90b7a LP |
656 | ret = uvc_acquire_privileges(handle); |
657 | if (ret < 0) | |
658 | return ret; | |
c0efd232 | 659 | |
d5e90b7a LP |
660 | return uvc_v4l2_set_format(stream, fmt); |
661 | } | |
c0efd232 | 662 | |
d5e90b7a LP |
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; | |
c0efd232 | 669 | |
d5e90b7a LP |
670 | return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); |
671 | } | |
c0efd232 | 672 | |
d5e90b7a LP |
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; | |
c0efd232 | 679 | |
d5e90b7a LP |
680 | return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); |
681 | } | |
c0efd232 | 682 | |
d5e90b7a LP |
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; | |
c0efd232 | 689 | |
d5e90b7a LP |
690 | ret = uvc_acquire_privileges(handle); |
691 | if (ret < 0) | |
692 | return ret; | |
c0efd232 | 693 | |
d5e90b7a LP |
694 | mutex_lock(&stream->mutex); |
695 | ret = uvc_alloc_buffers(&stream->queue, rb); | |
696 | mutex_unlock(&stream->mutex); | |
697 | if (ret < 0) | |
698 | return ret; | |
c0efd232 | 699 | |
d5e90b7a LP |
700 | if (ret == 0) |
701 | uvc_dismiss_privileges(handle); | |
c0efd232 | 702 | |
d5e90b7a LP |
703 | return 0; |
704 | } | |
c0efd232 | 705 | |
d5e90b7a LP |
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; | |
c0efd232 | 711 | |
d5e90b7a LP |
712 | if (!uvc_has_privileges(handle)) |
713 | return -EBUSY; | |
c0efd232 | 714 | |
d5e90b7a LP |
715 | return uvc_query_buffer(&stream->queue, buf); |
716 | } | |
0550513c | 717 | |
d5e90b7a LP |
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; | |
c0efd232 | 722 | |
d5e90b7a LP |
723 | if (!uvc_has_privileges(handle)) |
724 | return -EBUSY; | |
c0efd232 | 725 | |
d5e90b7a LP |
726 | return uvc_queue_buffer(&stream->queue, buf); |
727 | } | |
c0efd232 | 728 | |
d5e90b7a LP |
729 | static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) |
730 | { | |
731 | struct uvc_fh *handle = fh; | |
732 | struct uvc_streaming *stream = handle->stream; | |
c0efd232 | 733 | |
d5e90b7a LP |
734 | if (!uvc_has_privileges(handle)) |
735 | return -EBUSY; | |
c0efd232 | 736 | |
d5e90b7a LP |
737 | return uvc_dequeue_buffer(&stream->queue, buf, |
738 | file->f_flags & O_NONBLOCK); | |
739 | } | |
c0efd232 | 740 | |
d5e90b7a LP |
741 | static int uvc_ioctl_create_bufs(struct file *file, void *fh, |
742 | struct v4l2_create_buffers *cb) | |
743 | { | |
744 | struct uvc_fh *handle = fh; | |
745 | struct uvc_streaming *stream = handle->stream; | |
746 | int ret; | |
c0efd232 | 747 | |
d5e90b7a LP |
748 | ret = uvc_acquire_privileges(handle); |
749 | if (ret < 0) | |
750 | return ret; | |
c0efd232 | 751 | |
d5e90b7a LP |
752 | return uvc_create_buffers(&stream->queue, cb); |
753 | } | |
c0efd232 | 754 | |
d5e90b7a LP |
755 | static int uvc_ioctl_streamon(struct file *file, void *fh, |
756 | enum v4l2_buf_type type) | |
757 | { | |
758 | struct uvc_fh *handle = fh; | |
759 | struct uvc_streaming *stream = handle->stream; | |
760 | int ret; | |
0550513c | 761 | |
d5e90b7a LP |
762 | if (type != stream->type) |
763 | return -EINVAL; | |
764 | ||
765 | if (!uvc_has_privileges(handle)) | |
766 | return -EBUSY; | |
767 | ||
768 | mutex_lock(&stream->mutex); | |
b83bba24 | 769 | ret = uvc_queue_enable(&stream->queue, 1); |
d5e90b7a | 770 | mutex_unlock(&stream->mutex); |
c0efd232 | 771 | |
d5e90b7a LP |
772 | return ret; |
773 | } | |
c0efd232 | 774 | |
d5e90b7a LP |
775 | static int uvc_ioctl_streamoff(struct file *file, void *fh, |
776 | enum v4l2_buf_type type) | |
777 | { | |
778 | struct uvc_fh *handle = fh; | |
779 | struct uvc_streaming *stream = handle->stream; | |
c0efd232 | 780 | |
d5e90b7a LP |
781 | if (type != stream->type) |
782 | return -EINVAL; | |
c0efd232 | 783 | |
d5e90b7a LP |
784 | if (!uvc_has_privileges(handle)) |
785 | return -EBUSY; | |
c0efd232 | 786 | |
d5e90b7a | 787 | mutex_lock(&stream->mutex); |
b83bba24 | 788 | uvc_queue_enable(&stream->queue, 0); |
d5e90b7a | 789 | mutex_unlock(&stream->mutex); |
c0efd232 | 790 | |
b83bba24 | 791 | return 0; |
d5e90b7a | 792 | } |
c0efd232 | 793 | |
d5e90b7a LP |
794 | static int uvc_ioctl_enum_input(struct file *file, void *fh, |
795 | struct v4l2_input *input) | |
796 | { | |
797 | struct uvc_fh *handle = fh; | |
798 | struct uvc_video_chain *chain = handle->chain; | |
799 | const struct uvc_entity *selector = chain->selector; | |
800 | struct uvc_entity *iterm = NULL; | |
801 | u32 index = input->index; | |
802 | int pin = 0; | |
803 | ||
804 | if (selector == NULL || | |
805 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
806 | if (index != 0) | |
c0efd232 | 807 | return -EINVAL; |
d5e90b7a LP |
808 | list_for_each_entry(iterm, &chain->entities, chain) { |
809 | if (UVC_ENTITY_IS_ITERM(iterm)) | |
c0efd232 | 810 | break; |
c0efd232 | 811 | } |
d5e90b7a LP |
812 | pin = iterm->id; |
813 | } else if (index < selector->bNrInPins) { | |
814 | pin = selector->baSourceID[index]; | |
815 | list_for_each_entry(iterm, &chain->entities, chain) { | |
816 | if (!UVC_ENTITY_IS_ITERM(iterm)) | |
817 | continue; | |
818 | if (iterm->id == pin) | |
819 | break; | |
c0efd232 | 820 | } |
c0efd232 LP |
821 | } |
822 | ||
d5e90b7a LP |
823 | if (iterm == NULL || iterm->id != pin) |
824 | return -EINVAL; | |
c0efd232 | 825 | |
d5e90b7a LP |
826 | memset(input, 0, sizeof(*input)); |
827 | input->index = index; | |
828 | strlcpy(input->name, iterm->name, sizeof(input->name)); | |
829 | if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) | |
830 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
0550513c | 831 | |
d5e90b7a LP |
832 | return 0; |
833 | } | |
c0efd232 | 834 | |
d5e90b7a LP |
835 | static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input) |
836 | { | |
837 | struct uvc_fh *handle = fh; | |
838 | struct uvc_video_chain *chain = handle->chain; | |
839 | int ret; | |
840 | u8 i; | |
c0efd232 | 841 | |
d5e90b7a LP |
842 | if (chain->selector == NULL || |
843 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
844 | *input = 0; | |
845 | return 0; | |
846 | } | |
c0efd232 | 847 | |
d5e90b7a LP |
848 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id, |
849 | chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, | |
850 | &i, 1); | |
851 | if (ret < 0) | |
852 | return ret; | |
c0efd232 | 853 | |
d5e90b7a LP |
854 | *input = i - 1; |
855 | return 0; | |
856 | } | |
6947756d | 857 | |
d5e90b7a LP |
858 | static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input) |
859 | { | |
860 | struct uvc_fh *handle = fh; | |
861 | struct uvc_video_chain *chain = handle->chain; | |
862 | int ret; | |
863 | u32 i; | |
c0efd232 | 864 | |
d5e90b7a LP |
865 | ret = uvc_acquire_privileges(handle); |
866 | if (ret < 0) | |
867 | return ret; | |
c0efd232 | 868 | |
d5e90b7a LP |
869 | if (chain->selector == NULL || |
870 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
871 | if (input) | |
872 | return -EINVAL; | |
873 | return 0; | |
c0efd232 LP |
874 | } |
875 | ||
d5e90b7a LP |
876 | if (input >= chain->selector->bNrInPins) |
877 | return -EINVAL; | |
c0efd232 | 878 | |
d5e90b7a LP |
879 | i = input + 1; |
880 | return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id, | |
881 | chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, | |
882 | &i, 1); | |
883 | } | |
0550513c | 884 | |
d5e90b7a LP |
885 | static int uvc_ioctl_queryctrl(struct file *file, void *fh, |
886 | struct v4l2_queryctrl *qc) | |
887 | { | |
888 | struct uvc_fh *handle = fh; | |
889 | struct uvc_video_chain *chain = handle->chain; | |
c0efd232 | 890 | |
d5e90b7a LP |
891 | return uvc_query_v4l2_ctrl(chain, qc); |
892 | } | |
c0efd232 | 893 | |
d5e90b7a LP |
894 | static int uvc_ioctl_g_ctrl(struct file *file, void *fh, |
895 | struct v4l2_control *ctrl) | |
896 | { | |
897 | struct uvc_fh *handle = fh; | |
898 | struct uvc_video_chain *chain = handle->chain; | |
899 | struct v4l2_ext_control xctrl; | |
900 | int ret; | |
1a969d98 | 901 | |
d5e90b7a LP |
902 | memset(&xctrl, 0, sizeof(xctrl)); |
903 | xctrl.id = ctrl->id; | |
c0efd232 | 904 | |
d5e90b7a LP |
905 | ret = uvc_ctrl_begin(chain); |
906 | if (ret < 0) | |
907 | return ret; | |
c0efd232 | 908 | |
d5e90b7a LP |
909 | ret = uvc_ctrl_get(chain, &xctrl); |
910 | uvc_ctrl_rollback(handle); | |
911 | if (ret < 0) | |
912 | return ret; | |
c0efd232 | 913 | |
d5e90b7a LP |
914 | ctrl->value = xctrl.value; |
915 | return 0; | |
916 | } | |
c0efd232 | 917 | |
d5e90b7a LP |
918 | static int uvc_ioctl_s_ctrl(struct file *file, void *fh, |
919 | struct v4l2_control *ctrl) | |
920 | { | |
921 | struct uvc_fh *handle = fh; | |
922 | struct uvc_video_chain *chain = handle->chain; | |
923 | struct v4l2_ext_control xctrl; | |
924 | int ret; | |
6e9179e2 | 925 | |
d5e90b7a LP |
926 | memset(&xctrl, 0, sizeof(xctrl)); |
927 | xctrl.id = ctrl->id; | |
928 | xctrl.value = ctrl->value; | |
6e9179e2 | 929 | |
d5e90b7a LP |
930 | ret = uvc_ctrl_begin(chain); |
931 | if (ret < 0) | |
932 | return ret; | |
933 | ||
934 | ret = uvc_ctrl_set(chain, &xctrl); | |
935 | if (ret < 0) { | |
936 | uvc_ctrl_rollback(handle); | |
937 | return ret; | |
6e9179e2 PZ |
938 | } |
939 | ||
d5e90b7a LP |
940 | ret = uvc_ctrl_commit(handle, &xctrl, 1); |
941 | if (ret < 0) | |
942 | return ret; | |
c0efd232 | 943 | |
d5e90b7a LP |
944 | ctrl->value = xctrl.value; |
945 | return 0; | |
946 | } | |
c0efd232 | 947 | |
d5e90b7a LP |
948 | static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh, |
949 | struct v4l2_ext_controls *ctrls) | |
950 | { | |
951 | struct uvc_fh *handle = fh; | |
952 | struct uvc_video_chain *chain = handle->chain; | |
953 | struct v4l2_ext_control *ctrl = ctrls->controls; | |
954 | unsigned int i; | |
955 | int ret; | |
c0efd232 | 956 | |
d5e90b7a LP |
957 | ret = uvc_ctrl_begin(chain); |
958 | if (ret < 0) | |
959 | return ret; | |
c0efd232 | 960 | |
d5e90b7a LP |
961 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { |
962 | ret = uvc_ctrl_get(chain, ctrl); | |
963 | if (ret < 0) { | |
964 | uvc_ctrl_rollback(handle); | |
965 | ctrls->error_idx = i; | |
966 | return ret; | |
967 | } | |
968 | } | |
c0efd232 | 969 | |
d5e90b7a | 970 | ctrls->error_idx = 0; |
c0efd232 | 971 | |
d5e90b7a LP |
972 | return uvc_ctrl_rollback(handle); |
973 | } | |
0550513c | 974 | |
d5e90b7a LP |
975 | static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, |
976 | struct v4l2_ext_controls *ctrls, | |
977 | bool commit) | |
978 | { | |
979 | struct v4l2_ext_control *ctrl = ctrls->controls; | |
980 | struct uvc_video_chain *chain = handle->chain; | |
981 | unsigned int i; | |
982 | int ret; | |
c0efd232 | 983 | |
d5e90b7a LP |
984 | ret = uvc_ctrl_begin(chain); |
985 | if (ret < 0) | |
986 | return ret; | |
987 | ||
988 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { | |
989 | ret = uvc_ctrl_set(chain, ctrl); | |
990 | if (ret < 0) { | |
991 | uvc_ctrl_rollback(handle); | |
992 | ctrls->error_idx = commit ? ctrls->count : i; | |
c0efd232 | 993 | return ret; |
d5e90b7a | 994 | } |
c0efd232 LP |
995 | } |
996 | ||
d5e90b7a | 997 | ctrls->error_idx = 0; |
c0efd232 | 998 | |
d5e90b7a LP |
999 | if (commit) |
1000 | return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count); | |
1001 | else | |
1002 | return uvc_ctrl_rollback(handle); | |
1003 | } | |
c0efd232 | 1004 | |
d5e90b7a LP |
1005 | static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh, |
1006 | struct v4l2_ext_controls *ctrls) | |
1007 | { | |
1008 | struct uvc_fh *handle = fh; | |
0550513c | 1009 | |
d5e90b7a LP |
1010 | return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true); |
1011 | } | |
1012 | ||
1013 | static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh, | |
1014 | struct v4l2_ext_controls *ctrls) | |
1015 | { | |
1016 | struct uvc_fh *handle = fh; | |
1017 | ||
1018 | return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false); | |
1019 | } | |
c0efd232 | 1020 | |
d5e90b7a LP |
1021 | static int uvc_ioctl_querymenu(struct file *file, void *fh, |
1022 | struct v4l2_querymenu *qm) | |
1023 | { | |
1024 | struct uvc_fh *handle = fh; | |
1025 | struct uvc_video_chain *chain = handle->chain; | |
1026 | ||
1027 | return uvc_query_v4l2_menu(chain, qm); | |
1028 | } | |
1029 | ||
1030 | static int uvc_ioctl_cropcap(struct file *file, void *fh, | |
1031 | struct v4l2_cropcap *ccap) | |
1032 | { | |
1033 | struct uvc_fh *handle = fh; | |
1034 | struct uvc_streaming *stream = handle->stream; | |
1035 | ||
1036 | if (ccap->type != stream->type) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | ccap->bounds.left = 0; | |
1040 | ccap->bounds.top = 0; | |
1041 | mutex_lock(&stream->mutex); | |
1042 | ccap->bounds.width = stream->cur_frame->wWidth; | |
1043 | ccap->bounds.height = stream->cur_frame->wHeight; | |
1044 | mutex_unlock(&stream->mutex); | |
1045 | ||
1046 | ccap->defrect = ccap->bounds; | |
1047 | ||
1048 | ccap->pixelaspect.numerator = 1; | |
1049 | ccap->pixelaspect.denominator = 1; | |
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | static int uvc_ioctl_g_parm(struct file *file, void *fh, | |
1054 | struct v4l2_streamparm *parm) | |
1055 | { | |
1056 | struct uvc_fh *handle = fh; | |
1057 | struct uvc_streaming *stream = handle->stream; | |
1058 | ||
1059 | return uvc_v4l2_get_streamparm(stream, parm); | |
1060 | } | |
1061 | ||
1062 | static int uvc_ioctl_s_parm(struct file *file, void *fh, | |
1063 | struct v4l2_streamparm *parm) | |
1064 | { | |
1065 | struct uvc_fh *handle = fh; | |
1066 | struct uvc_streaming *stream = handle->stream; | |
1067 | int ret; | |
1068 | ||
1069 | ret = uvc_acquire_privileges(handle); | |
1070 | if (ret < 0) | |
1071 | return ret; | |
1072 | ||
1073 | return uvc_v4l2_set_streamparm(stream, parm); | |
1074 | } | |
1075 | ||
1076 | static int uvc_ioctl_enum_framesizes(struct file *file, void *fh, | |
1077 | struct v4l2_frmsizeenum *fsize) | |
1078 | { | |
1079 | struct uvc_fh *handle = fh; | |
1080 | struct uvc_streaming *stream = handle->stream; | |
1081 | struct uvc_format *format = NULL; | |
1082 | struct uvc_frame *frame; | |
1083 | int i; | |
1084 | ||
1085 | /* Look for the given pixel format */ | |
1086 | for (i = 0; i < stream->nformats; i++) { | |
1087 | if (stream->format[i].fcc == fsize->pixel_format) { | |
1088 | format = &stream->format[i]; | |
1089 | break; | |
1090 | } | |
c0efd232 | 1091 | } |
d5e90b7a LP |
1092 | if (format == NULL) |
1093 | return -EINVAL; | |
c0efd232 | 1094 | |
d5e90b7a LP |
1095 | if (fsize->index >= format->nframes) |
1096 | return -EINVAL; | |
b4012002 | 1097 | |
d5e90b7a LP |
1098 | frame = &format->frame[fsize->index]; |
1099 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1100 | fsize->discrete.width = frame->wWidth; | |
1101 | fsize->discrete.height = frame->wHeight; | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, | |
1106 | struct v4l2_frmivalenum *fival) | |
1107 | { | |
1108 | struct uvc_fh *handle = fh; | |
1109 | struct uvc_streaming *stream = handle->stream; | |
1110 | struct uvc_format *format = NULL; | |
1111 | struct uvc_frame *frame = NULL; | |
1112 | int i; | |
1113 | ||
1114 | /* Look for the given pixel format and frame size */ | |
1115 | for (i = 0; i < stream->nformats; i++) { | |
1116 | if (stream->format[i].fcc == fival->pixel_format) { | |
1117 | format = &stream->format[i]; | |
1118 | break; | |
b4012002 HG |
1119 | } |
1120 | } | |
d5e90b7a LP |
1121 | if (format == NULL) |
1122 | return -EINVAL; | |
b4012002 | 1123 | |
d5e90b7a LP |
1124 | for (i = 0; i < format->nframes; i++) { |
1125 | if (format->frame[i].wWidth == fival->width && | |
1126 | format->frame[i].wHeight == fival->height) { | |
1127 | frame = &format->frame[i]; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | if (frame == NULL) | |
1132 | return -EINVAL; | |
b4012002 | 1133 | |
d5e90b7a LP |
1134 | if (frame->bFrameIntervalType) { |
1135 | if (fival->index >= frame->bFrameIntervalType) | |
1136 | return -EINVAL; | |
b4012002 | 1137 | |
d5e90b7a LP |
1138 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
1139 | fival->discrete.numerator = | |
1140 | frame->dwFrameInterval[fival->index]; | |
1141 | fival->discrete.denominator = 10000000; | |
1142 | uvc_simplify_fraction(&fival->discrete.numerator, | |
1143 | &fival->discrete.denominator, 8, 333); | |
1144 | } else { | |
1145 | fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; | |
1146 | fival->stepwise.min.numerator = frame->dwFrameInterval[0]; | |
1147 | fival->stepwise.min.denominator = 10000000; | |
1148 | fival->stepwise.max.numerator = frame->dwFrameInterval[1]; | |
1149 | fival->stepwise.max.denominator = 10000000; | |
1150 | fival->stepwise.step.numerator = frame->dwFrameInterval[2]; | |
1151 | fival->stepwise.step.denominator = 10000000; | |
1152 | uvc_simplify_fraction(&fival->stepwise.min.numerator, | |
1153 | &fival->stepwise.min.denominator, 8, 333); | |
1154 | uvc_simplify_fraction(&fival->stepwise.max.numerator, | |
1155 | &fival->stepwise.max.denominator, 8, 333); | |
1156 | uvc_simplify_fraction(&fival->stepwise.step.numerator, | |
1157 | &fival->stepwise.step.denominator, 8, 333); | |
1158 | } | |
c0efd232 | 1159 | |
d5e90b7a LP |
1160 | return 0; |
1161 | } | |
c0efd232 | 1162 | |
d5e90b7a LP |
1163 | static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh, |
1164 | const struct v4l2_event_subscription *sub) | |
1165 | { | |
1166 | switch (sub->type) { | |
1167 | case V4L2_EVENT_CTRL: | |
1168 | return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops); | |
1169 | default: | |
1170 | return -EINVAL; | |
1171 | } | |
1172 | } | |
c0efd232 | 1173 | |
d5e90b7a LP |
1174 | static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio, |
1175 | unsigned int cmd, void *arg) | |
1176 | { | |
1177 | struct uvc_fh *handle = fh; | |
1178 | struct uvc_video_chain *chain = handle->chain; | |
c0efd232 | 1179 | |
d5e90b7a LP |
1180 | switch (cmd) { |
1181 | /* Dynamic controls. */ | |
c0efd232 | 1182 | case UVCIOC_CTRL_MAP: |
227bd5b3 | 1183 | return uvc_ioctl_ctrl_map(chain, arg); |
fe78d187 MR |
1184 | |
1185 | case UVCIOC_CTRL_QUERY: | |
1186 | return uvc_xu_ctrl_query(chain, arg); | |
c0efd232 LP |
1187 | |
1188 | default: | |
a3ec69b7 | 1189 | return -ENOTTY; |
c0efd232 | 1190 | } |
c0efd232 LP |
1191 | } |
1192 | ||
1a5e4c86 LP |
1193 | #ifdef CONFIG_COMPAT |
1194 | struct uvc_xu_control_mapping32 { | |
1195 | __u32 id; | |
1196 | __u8 name[32]; | |
1197 | __u8 entity[16]; | |
1198 | __u8 selector; | |
1199 | ||
1200 | __u8 size; | |
1201 | __u8 offset; | |
1202 | __u32 v4l2_type; | |
1203 | __u32 data_type; | |
1204 | ||
1205 | compat_caddr_t menu_info; | |
1206 | __u32 menu_count; | |
1207 | ||
1208 | __u32 reserved[4]; | |
1209 | }; | |
1210 | ||
1211 | static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp, | |
1212 | const struct uvc_xu_control_mapping32 __user *up) | |
1213 | { | |
1214 | struct uvc_menu_info __user *umenus; | |
1215 | struct uvc_menu_info __user *kmenus; | |
1216 | compat_caddr_t p; | |
1217 | ||
1218 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
1219 | __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) || | |
1220 | __get_user(kp->menu_count, &up->menu_count)) | |
1221 | return -EFAULT; | |
1222 | ||
1223 | memset(kp->reserved, 0, sizeof(kp->reserved)); | |
1224 | ||
1225 | if (kp->menu_count == 0) { | |
1226 | kp->menu_info = NULL; | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | if (__get_user(p, &up->menu_info)) | |
1231 | return -EFAULT; | |
1232 | umenus = compat_ptr(p); | |
1233 | if (!access_ok(VERIFY_READ, umenus, kp->menu_count * sizeof(*umenus))) | |
1234 | return -EFAULT; | |
1235 | ||
1236 | kmenus = compat_alloc_user_space(kp->menu_count * sizeof(*kmenus)); | |
1237 | if (kmenus == NULL) | |
1238 | return -EFAULT; | |
1239 | kp->menu_info = kmenus; | |
1240 | ||
1241 | if (copy_in_user(kmenus, umenus, kp->menu_count * sizeof(*umenus))) | |
1242 | return -EFAULT; | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp, | |
1248 | struct uvc_xu_control_mapping32 __user *up) | |
1249 | { | |
1250 | struct uvc_menu_info __user *umenus; | |
1251 | struct uvc_menu_info __user *kmenus = kp->menu_info; | |
1252 | compat_caddr_t p; | |
1253 | ||
1254 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
1255 | __copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) || | |
1256 | __put_user(kp->menu_count, &up->menu_count)) | |
1257 | return -EFAULT; | |
1258 | ||
57fb4a48 HG |
1259 | if (__clear_user(up->reserved, sizeof(up->reserved))) |
1260 | return -EFAULT; | |
1a5e4c86 LP |
1261 | |
1262 | if (kp->menu_count == 0) | |
1263 | return 0; | |
1264 | ||
1265 | if (get_user(p, &up->menu_info)) | |
1266 | return -EFAULT; | |
1267 | umenus = compat_ptr(p); | |
1a5e4c86 LP |
1268 | |
1269 | if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus))) | |
1270 | return -EFAULT; | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | struct uvc_xu_control_query32 { | |
1276 | __u8 unit; | |
1277 | __u8 selector; | |
1278 | __u8 query; | |
1279 | __u16 size; | |
1280 | compat_caddr_t data; | |
1281 | }; | |
1282 | ||
1283 | static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp, | |
1284 | const struct uvc_xu_control_query32 __user *up) | |
1285 | { | |
1286 | u8 __user *udata; | |
1287 | u8 __user *kdata; | |
1288 | compat_caddr_t p; | |
1289 | ||
1290 | if (!access_ok(VERIFY_READ, up, sizeof(*up)) || | |
1291 | __copy_from_user(kp, up, offsetof(typeof(*up), data))) | |
1292 | return -EFAULT; | |
1293 | ||
1294 | if (kp->size == 0) { | |
1295 | kp->data = NULL; | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | if (__get_user(p, &up->data)) | |
1300 | return -EFAULT; | |
1301 | udata = compat_ptr(p); | |
1302 | if (!access_ok(VERIFY_READ, udata, kp->size)) | |
1303 | return -EFAULT; | |
1304 | ||
1305 | kdata = compat_alloc_user_space(kp->size); | |
1306 | if (kdata == NULL) | |
1307 | return -EFAULT; | |
1308 | kp->data = kdata; | |
1309 | ||
1310 | if (copy_in_user(kdata, udata, kp->size)) | |
1311 | return -EFAULT; | |
1312 | ||
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp, | |
1317 | struct uvc_xu_control_query32 __user *up) | |
1318 | { | |
1319 | u8 __user *udata; | |
1320 | u8 __user *kdata = kp->data; | |
1321 | compat_caddr_t p; | |
1322 | ||
1323 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || | |
1324 | __copy_to_user(up, kp, offsetof(typeof(*up), data))) | |
1325 | return -EFAULT; | |
1326 | ||
1327 | if (kp->size == 0) | |
1328 | return 0; | |
1329 | ||
1330 | if (get_user(p, &up->data)) | |
1331 | return -EFAULT; | |
1332 | udata = compat_ptr(p); | |
1333 | if (!access_ok(VERIFY_READ, udata, kp->size)) | |
1334 | return -EFAULT; | |
1335 | ||
1336 | if (copy_in_user(udata, kdata, kp->size)) | |
1337 | return -EFAULT; | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | #define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32) | |
1343 | #define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32) | |
1344 | ||
1345 | static long uvc_v4l2_compat_ioctl32(struct file *file, | |
1346 | unsigned int cmd, unsigned long arg) | |
1347 | { | |
1348 | union { | |
1349 | struct uvc_xu_control_mapping xmap; | |
1350 | struct uvc_xu_control_query xqry; | |
1351 | } karg; | |
1352 | void __user *up = compat_ptr(arg); | |
1353 | mm_segment_t old_fs; | |
1354 | long ret; | |
1355 | ||
1356 | switch (cmd) { | |
1357 | case UVCIOC_CTRL_MAP32: | |
1358 | cmd = UVCIOC_CTRL_MAP; | |
1359 | ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up); | |
1360 | break; | |
1361 | ||
1362 | case UVCIOC_CTRL_QUERY32: | |
1363 | cmd = UVCIOC_CTRL_QUERY; | |
1364 | ret = uvc_v4l2_get_xu_query(&karg.xqry, up); | |
1365 | break; | |
1366 | ||
1367 | default: | |
1368 | return -ENOIOCTLCMD; | |
1369 | } | |
1370 | ||
1371 | old_fs = get_fs(); | |
1372 | set_fs(KERNEL_DS); | |
d5e90b7a | 1373 | ret = video_ioctl2(file, cmd, (unsigned long)&karg); |
1a5e4c86 LP |
1374 | set_fs(old_fs); |
1375 | ||
1376 | if (ret < 0) | |
1377 | return ret; | |
1378 | ||
1379 | switch (cmd) { | |
1380 | case UVCIOC_CTRL_MAP: | |
1381 | ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up); | |
1382 | break; | |
1383 | ||
1384 | case UVCIOC_CTRL_QUERY: | |
1385 | ret = uvc_v4l2_put_xu_query(&karg.xqry, up); | |
1386 | break; | |
1387 | } | |
1388 | ||
1389 | return ret; | |
1390 | } | |
1391 | #endif | |
1392 | ||
c0efd232 LP |
1393 | static ssize_t uvc_v4l2_read(struct file *file, char __user *data, |
1394 | size_t count, loff_t *ppos) | |
1395 | { | |
1396 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); | |
350d6407 | 1397 | return -EINVAL; |
c0efd232 LP |
1398 | } |
1399 | ||
c0efd232 LP |
1400 | static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) |
1401 | { | |
abf84383 | 1402 | struct uvc_fh *handle = file->private_data; |
35f02a68 | 1403 | struct uvc_streaming *stream = handle->stream; |
c0efd232 LP |
1404 | |
1405 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); | |
1406 | ||
4aa27597 | 1407 | return uvc_queue_mmap(&stream->queue, vma); |
c0efd232 LP |
1408 | } |
1409 | ||
1410 | static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) | |
1411 | { | |
abf84383 | 1412 | struct uvc_fh *handle = file->private_data; |
35f02a68 | 1413 | struct uvc_streaming *stream = handle->stream; |
c0efd232 LP |
1414 | |
1415 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); | |
1416 | ||
35f02a68 | 1417 | return uvc_queue_poll(&stream->queue, file, wait); |
c0efd232 LP |
1418 | } |
1419 | ||
72969447 BL |
1420 | #ifndef CONFIG_MMU |
1421 | static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, | |
1422 | unsigned long addr, unsigned long len, unsigned long pgoff, | |
1423 | unsigned long flags) | |
1424 | { | |
1425 | struct uvc_fh *handle = file->private_data; | |
1426 | struct uvc_streaming *stream = handle->stream; | |
1427 | ||
1428 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); | |
1429 | ||
1430 | return uvc_queue_get_unmapped_area(&stream->queue, pgoff); | |
1431 | } | |
1432 | #endif | |
1433 | ||
d5e90b7a LP |
1434 | const struct v4l2_ioctl_ops uvc_ioctl_ops = { |
1435 | .vidioc_querycap = uvc_ioctl_querycap, | |
1436 | .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap, | |
1437 | .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out, | |
1438 | .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap, | |
1439 | .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out, | |
1440 | .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap, | |
1441 | .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out, | |
1442 | .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap, | |
1443 | .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out, | |
1444 | .vidioc_reqbufs = uvc_ioctl_reqbufs, | |
1445 | .vidioc_querybuf = uvc_ioctl_querybuf, | |
1446 | .vidioc_qbuf = uvc_ioctl_qbuf, | |
1447 | .vidioc_dqbuf = uvc_ioctl_dqbuf, | |
1448 | .vidioc_create_bufs = uvc_ioctl_create_bufs, | |
1449 | .vidioc_streamon = uvc_ioctl_streamon, | |
1450 | .vidioc_streamoff = uvc_ioctl_streamoff, | |
1451 | .vidioc_enum_input = uvc_ioctl_enum_input, | |
1452 | .vidioc_g_input = uvc_ioctl_g_input, | |
1453 | .vidioc_s_input = uvc_ioctl_s_input, | |
1454 | .vidioc_queryctrl = uvc_ioctl_queryctrl, | |
1455 | .vidioc_g_ctrl = uvc_ioctl_g_ctrl, | |
1456 | .vidioc_s_ctrl = uvc_ioctl_s_ctrl, | |
1457 | .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls, | |
1458 | .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls, | |
1459 | .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls, | |
1460 | .vidioc_querymenu = uvc_ioctl_querymenu, | |
1461 | .vidioc_cropcap = uvc_ioctl_cropcap, | |
1462 | .vidioc_g_parm = uvc_ioctl_g_parm, | |
1463 | .vidioc_s_parm = uvc_ioctl_s_parm, | |
1464 | .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes, | |
1465 | .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals, | |
1466 | .vidioc_subscribe_event = uvc_ioctl_subscribe_event, | |
1467 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
1468 | .vidioc_default = uvc_ioctl_default, | |
1469 | }; | |
1470 | ||
bec43661 | 1471 | const struct v4l2_file_operations uvc_fops = { |
c0efd232 LP |
1472 | .owner = THIS_MODULE, |
1473 | .open = uvc_v4l2_open, | |
1474 | .release = uvc_v4l2_release, | |
d5e90b7a | 1475 | .unlocked_ioctl = video_ioctl2, |
1a5e4c86 LP |
1476 | #ifdef CONFIG_COMPAT |
1477 | .compat_ioctl32 = uvc_v4l2_compat_ioctl32, | |
1478 | #endif | |
c0efd232 LP |
1479 | .read = uvc_v4l2_read, |
1480 | .mmap = uvc_v4l2_mmap, | |
1481 | .poll = uvc_v4l2_poll, | |
72969447 BL |
1482 | #ifndef CONFIG_MMU |
1483 | .get_unmapped_area = uvc_v4l2_get_unmapped_area, | |
1484 | #endif | |
c0efd232 | 1485 | }; |
f87086e3 | 1486 |