Commit | Line | Data |
---|---|---|
c0efd232 LP |
1 | /* |
2 | * uvc_v4l2.c -- USB Video Class driver - V4L2 API | |
3 | * | |
2c2d264b | 4 | * Copyright (C) 2005-2009 |
c0efd232 LP |
5 | * Laurent Pinchart (laurent.pinchart@skynet.be) |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/version.h> | |
16 | #include <linux/list.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/usb.h> | |
19 | #include <linux/videodev2.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/wait.h> | |
23 | #include <asm/atomic.h> | |
24 | ||
25 | #include <media/v4l2-common.h> | |
35ea11ff | 26 | #include <media/v4l2-ioctl.h> |
c0efd232 LP |
27 | |
28 | #include "uvcvideo.h" | |
29 | ||
30 | /* ------------------------------------------------------------------------ | |
31 | * V4L2 interface | |
32 | */ | |
33 | ||
34 | /* | |
35 | * Mapping V4L2 controls to UVC controls can be straighforward if done well. | |
36 | * Most of the UVC controls exist in V4L2, and can be mapped directly. Some | |
37 | * must be grouped (for instance the Red Balance, Blue Balance and Do White | |
38 | * Balance V4L2 controls use the White Balance Component UVC control) or | |
39 | * otherwise translated. The approach we take here is to use a translation | |
2c2d264b | 40 | * table for the controls that can be mapped directly, and handle the others |
c0efd232 LP |
41 | * manually. |
42 | */ | |
8e113595 | 43 | static int uvc_v4l2_query_menu(struct uvc_video_chain *chain, |
c0efd232 LP |
44 | struct v4l2_querymenu *query_menu) |
45 | { | |
46 | struct uvc_menu_info *menu_info; | |
47 | struct uvc_control_mapping *mapping; | |
48 | struct uvc_control *ctrl; | |
2460cdac MN |
49 | u32 index = query_menu->index; |
50 | u32 id = query_menu->id; | |
c0efd232 | 51 | |
8e113595 | 52 | ctrl = uvc_find_control(chain, query_menu->id, &mapping); |
c0efd232 LP |
53 | if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) |
54 | return -EINVAL; | |
55 | ||
56 | if (query_menu->index >= mapping->menu_count) | |
57 | return -EINVAL; | |
58 | ||
2460cdac MN |
59 | memset(query_menu, 0, sizeof(*query_menu)); |
60 | query_menu->id = id; | |
61 | query_menu->index = index; | |
62 | ||
c0efd232 | 63 | menu_info = &mapping->menu_info[query_menu->index]; |
d0ebf307 | 64 | strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); |
c0efd232 LP |
65 | return 0; |
66 | } | |
67 | ||
68 | /* | |
69 | * Find the frame interval closest to the requested frame interval for the | |
70 | * given frame format and size. This should be done by the device as part of | |
71 | * the Video Probe and Commit negotiation, but some hardware don't implement | |
72 | * that feature. | |
73 | */ | |
74 | static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) | |
75 | { | |
76 | unsigned int i; | |
77 | ||
78 | if (frame->bFrameIntervalType) { | |
79 | __u32 best = -1, dist; | |
80 | ||
81 | for (i = 0; i < frame->bFrameIntervalType; ++i) { | |
82 | dist = interval > frame->dwFrameInterval[i] | |
83 | ? interval - frame->dwFrameInterval[i] | |
84 | : frame->dwFrameInterval[i] - interval; | |
85 | ||
86 | if (dist > best) | |
87 | break; | |
88 | ||
89 | best = dist; | |
90 | } | |
91 | ||
92 | interval = frame->dwFrameInterval[i-1]; | |
93 | } else { | |
94 | const __u32 min = frame->dwFrameInterval[0]; | |
95 | const __u32 max = frame->dwFrameInterval[1]; | |
96 | const __u32 step = frame->dwFrameInterval[2]; | |
97 | ||
98 | interval = min + (interval - min + step/2) / step * step; | |
99 | if (interval > max) | |
100 | interval = max; | |
101 | } | |
102 | ||
103 | return interval; | |
104 | } | |
105 | ||
35f02a68 | 106 | static int uvc_v4l2_try_format(struct uvc_streaming *stream, |
c0efd232 LP |
107 | struct v4l2_format *fmt, struct uvc_streaming_control *probe, |
108 | struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) | |
109 | { | |
110 | struct uvc_format *format = NULL; | |
111 | struct uvc_frame *frame = NULL; | |
112 | __u16 rw, rh; | |
113 | unsigned int d, maxd; | |
114 | unsigned int i; | |
115 | __u32 interval; | |
116 | int ret = 0; | |
117 | __u8 *fcc; | |
118 | ||
35f02a68 | 119 | if (fmt->type != stream->type) |
c0efd232 LP |
120 | return -EINVAL; |
121 | ||
122 | fcc = (__u8 *)&fmt->fmt.pix.pixelformat; | |
123 | uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n", | |
124 | fmt->fmt.pix.pixelformat, | |
125 | fcc[0], fcc[1], fcc[2], fcc[3], | |
126 | fmt->fmt.pix.width, fmt->fmt.pix.height); | |
127 | ||
128 | /* Check if the hardware supports the requested format. */ | |
35f02a68 LP |
129 | for (i = 0; i < stream->nformats; ++i) { |
130 | format = &stream->format[i]; | |
c0efd232 LP |
131 | if (format->fcc == fmt->fmt.pix.pixelformat) |
132 | break; | |
133 | } | |
134 | ||
135 | if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) { | |
136 | uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n", | |
137 | fmt->fmt.pix.pixelformat); | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | /* Find the closest image size. The distance between image sizes is | |
142 | * the size in pixels of the non-overlapping regions between the | |
143 | * requested size and the frame-specified size. | |
144 | */ | |
145 | rw = fmt->fmt.pix.width; | |
146 | rh = fmt->fmt.pix.height; | |
147 | maxd = (unsigned int)-1; | |
148 | ||
149 | for (i = 0; i < format->nframes; ++i) { | |
150 | __u16 w = format->frame[i].wWidth; | |
151 | __u16 h = format->frame[i].wHeight; | |
152 | ||
153 | d = min(w, rw) * min(h, rh); | |
154 | d = w*h + rw*rh - 2*d; | |
155 | if (d < maxd) { | |
156 | maxd = d; | |
157 | frame = &format->frame[i]; | |
158 | } | |
159 | ||
160 | if (maxd == 0) | |
161 | break; | |
162 | } | |
163 | ||
164 | if (frame == NULL) { | |
165 | uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n", | |
166 | fmt->fmt.pix.width, fmt->fmt.pix.height); | |
167 | return -EINVAL; | |
168 | } | |
169 | ||
170 | /* Use the default frame interval. */ | |
171 | interval = frame->dwDefaultFrameInterval; | |
172 | uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us " | |
173 | "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval, | |
174 | (100000000/interval)%10); | |
175 | ||
176 | /* Set the format index, frame index and frame interval. */ | |
177 | memset(probe, 0, sizeof *probe); | |
178 | probe->bmHint = 1; /* dwFrameInterval */ | |
179 | probe->bFormatIndex = format->index; | |
180 | probe->bFrameIndex = frame->bFrameIndex; | |
181 | probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); | |
182 | /* Some webcams stall the probe control set request when the | |
183 | * dwMaxVideoFrameSize field is set to zero. The UVC specification | |
184 | * clearly states that the field is read-only from the host, so this | |
185 | * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by | |
186 | * the webcam to work around the problem. | |
187 | * | |
188 | * The workaround could probably be enabled for all webcams, so the | |
189 | * quirk can be removed if needed. It's currently useful to detect | |
190 | * webcam bugs and fix them before they hit the market (providing | |
191 | * developers test their webcams with the Linux driver as well as with | |
192 | * the Windows driver). | |
193 | */ | |
35f02a68 | 194 | if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) |
c0efd232 | 195 | probe->dwMaxVideoFrameSize = |
35f02a68 | 196 | stream->ctrl.dwMaxVideoFrameSize; |
c0efd232 | 197 | |
2c2d264b | 198 | /* Probe the device. */ |
35f02a68 LP |
199 | ret = uvc_probe_video(stream, probe); |
200 | if (ret < 0) | |
c0efd232 LP |
201 | goto done; |
202 | ||
203 | fmt->fmt.pix.width = frame->wWidth; | |
204 | fmt->fmt.pix.height = frame->wHeight; | |
205 | fmt->fmt.pix.field = V4L2_FIELD_NONE; | |
206 | fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; | |
207 | fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; | |
208 | fmt->fmt.pix.colorspace = format->colorspace; | |
209 | fmt->fmt.pix.priv = 0; | |
210 | ||
211 | if (uvc_format != NULL) | |
212 | *uvc_format = format; | |
213 | if (uvc_frame != NULL) | |
214 | *uvc_frame = frame; | |
215 | ||
216 | done: | |
217 | return ret; | |
218 | } | |
219 | ||
35f02a68 | 220 | static int uvc_v4l2_get_format(struct uvc_streaming *stream, |
c0efd232 LP |
221 | struct v4l2_format *fmt) |
222 | { | |
35f02a68 LP |
223 | struct uvc_format *format = stream->cur_format; |
224 | struct uvc_frame *frame = stream->cur_frame; | |
c0efd232 | 225 | |
35f02a68 | 226 | if (fmt->type != stream->type) |
c0efd232 LP |
227 | return -EINVAL; |
228 | ||
229 | if (format == NULL || frame == NULL) | |
230 | return -EINVAL; | |
231 | ||
232 | fmt->fmt.pix.pixelformat = format->fcc; | |
233 | fmt->fmt.pix.width = frame->wWidth; | |
234 | fmt->fmt.pix.height = frame->wHeight; | |
235 | fmt->fmt.pix.field = V4L2_FIELD_NONE; | |
236 | fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; | |
35f02a68 | 237 | fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; |
c0efd232 LP |
238 | fmt->fmt.pix.colorspace = format->colorspace; |
239 | fmt->fmt.pix.priv = 0; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
35f02a68 | 244 | static int uvc_v4l2_set_format(struct uvc_streaming *stream, |
c0efd232 LP |
245 | struct v4l2_format *fmt) |
246 | { | |
247 | struct uvc_streaming_control probe; | |
248 | struct uvc_format *format; | |
249 | struct uvc_frame *frame; | |
250 | int ret; | |
251 | ||
35f02a68 | 252 | if (fmt->type != stream->type) |
c0efd232 LP |
253 | return -EINVAL; |
254 | ||
35f02a68 | 255 | if (uvc_queue_allocated(&stream->queue)) |
c0efd232 LP |
256 | return -EBUSY; |
257 | ||
35f02a68 | 258 | ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); |
c0efd232 LP |
259 | if (ret < 0) |
260 | return ret; | |
261 | ||
35f02a68 LP |
262 | memcpy(&stream->ctrl, &probe, sizeof probe); |
263 | stream->cur_format = format; | |
264 | stream->cur_frame = frame; | |
c0efd232 LP |
265 | |
266 | return 0; | |
267 | } | |
268 | ||
35f02a68 | 269 | static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, |
c0efd232 LP |
270 | struct v4l2_streamparm *parm) |
271 | { | |
272 | uint32_t numerator, denominator; | |
273 | ||
35f02a68 | 274 | if (parm->type != stream->type) |
c0efd232 LP |
275 | return -EINVAL; |
276 | ||
35f02a68 | 277 | numerator = stream->ctrl.dwFrameInterval; |
c0efd232 LP |
278 | denominator = 10000000; |
279 | uvc_simplify_fraction(&numerator, &denominator, 8, 333); | |
280 | ||
281 | memset(parm, 0, sizeof *parm); | |
35f02a68 | 282 | parm->type = stream->type; |
ff924203 | 283 | |
35f02a68 | 284 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
ff924203 LP |
285 | parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
286 | parm->parm.capture.capturemode = 0; | |
287 | parm->parm.capture.timeperframe.numerator = numerator; | |
288 | parm->parm.capture.timeperframe.denominator = denominator; | |
289 | parm->parm.capture.extendedmode = 0; | |
290 | parm->parm.capture.readbuffers = 0; | |
291 | } else { | |
292 | parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME; | |
293 | parm->parm.output.outputmode = 0; | |
294 | parm->parm.output.timeperframe.numerator = numerator; | |
295 | parm->parm.output.timeperframe.denominator = denominator; | |
296 | } | |
c0efd232 LP |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
35f02a68 | 301 | static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, |
c0efd232 LP |
302 | struct v4l2_streamparm *parm) |
303 | { | |
35f02a68 | 304 | struct uvc_frame *frame = stream->cur_frame; |
c0efd232 | 305 | struct uvc_streaming_control probe; |
ff924203 | 306 | struct v4l2_fract timeperframe; |
c0efd232 LP |
307 | uint32_t interval; |
308 | int ret; | |
309 | ||
35f02a68 | 310 | if (parm->type != stream->type) |
c0efd232 LP |
311 | return -EINVAL; |
312 | ||
35f02a68 | 313 | if (uvc_queue_streaming(&stream->queue)) |
c0efd232 LP |
314 | return -EBUSY; |
315 | ||
ff924203 LP |
316 | if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
317 | timeperframe = parm->parm.capture.timeperframe; | |
318 | else | |
319 | timeperframe = parm->parm.output.timeperframe; | |
320 | ||
35f02a68 | 321 | memcpy(&probe, &stream->ctrl, sizeof probe); |
ff924203 LP |
322 | interval = uvc_fraction_to_interval(timeperframe.numerator, |
323 | timeperframe.denominator); | |
c0efd232 LP |
324 | |
325 | uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", | |
ff924203 | 326 | timeperframe.numerator, timeperframe.denominator, interval); |
c0efd232 LP |
327 | probe.dwFrameInterval = uvc_try_frame_interval(frame, interval); |
328 | ||
329 | /* Probe the device with the new settings. */ | |
35f02a68 LP |
330 | ret = uvc_probe_video(stream, &probe); |
331 | if (ret < 0) | |
c0efd232 LP |
332 | return ret; |
333 | ||
35f02a68 | 334 | memcpy(&stream->ctrl, &probe, sizeof probe); |
c0efd232 LP |
335 | |
336 | /* Return the actual frame period. */ | |
ff924203 LP |
337 | timeperframe.numerator = probe.dwFrameInterval; |
338 | timeperframe.denominator = 10000000; | |
339 | uvc_simplify_fraction(&timeperframe.numerator, | |
340 | &timeperframe.denominator, 8, 333); | |
341 | ||
342 | if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
343 | parm->parm.capture.timeperframe = timeperframe; | |
344 | else | |
345 | parm->parm.output.timeperframe = timeperframe; | |
c0efd232 LP |
346 | |
347 | return 0; | |
348 | } | |
349 | ||
350 | /* ------------------------------------------------------------------------ | |
351 | * Privilege management | |
352 | */ | |
353 | ||
354 | /* | |
355 | * Privilege management is the multiple-open implementation basis. The current | |
356 | * implementation is completely transparent for the end-user and doesn't | |
357 | * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. | |
358 | * Those ioctls enable finer control on the device (by making possible for a | |
359 | * user to request exclusive access to a device), but are not mature yet. | |
360 | * Switching to the V4L2 priority mechanism might be considered in the future | |
361 | * if this situation changes. | |
362 | * | |
363 | * Each open instance of a UVC device can either be in a privileged or | |
364 | * unprivileged state. Only a single instance can be in a privileged state at | |
2c2d264b | 365 | * a given time. Trying to perform an operation that requires privileges will |
c0efd232 LP |
366 | * automatically acquire the required privileges if possible, or return -EBUSY |
367 | * otherwise. Privileges are dismissed when closing the instance. | |
368 | * | |
2c2d264b | 369 | * Operations that require privileges are: |
c0efd232 LP |
370 | * |
371 | * - VIDIOC_S_INPUT | |
372 | * - VIDIOC_S_PARM | |
373 | * - VIDIOC_S_FMT | |
374 | * - VIDIOC_TRY_FMT | |
375 | * - VIDIOC_REQBUFS | |
376 | */ | |
377 | static int uvc_acquire_privileges(struct uvc_fh *handle) | |
378 | { | |
379 | int ret = 0; | |
380 | ||
381 | /* Always succeed if the handle is already privileged. */ | |
382 | if (handle->state == UVC_HANDLE_ACTIVE) | |
383 | return 0; | |
384 | ||
385 | /* Check if the device already has a privileged handle. */ | |
386 | mutex_lock(&uvc_driver.open_mutex); | |
35f02a68 LP |
387 | if (atomic_inc_return(&handle->stream->active) != 1) { |
388 | atomic_dec(&handle->stream->active); | |
c0efd232 LP |
389 | ret = -EBUSY; |
390 | goto done; | |
391 | } | |
392 | ||
393 | handle->state = UVC_HANDLE_ACTIVE; | |
394 | ||
395 | done: | |
396 | mutex_unlock(&uvc_driver.open_mutex); | |
397 | return ret; | |
398 | } | |
399 | ||
400 | static void uvc_dismiss_privileges(struct uvc_fh *handle) | |
401 | { | |
402 | if (handle->state == UVC_HANDLE_ACTIVE) | |
35f02a68 | 403 | atomic_dec(&handle->stream->active); |
c0efd232 LP |
404 | |
405 | handle->state = UVC_HANDLE_PASSIVE; | |
406 | } | |
407 | ||
408 | static int uvc_has_privileges(struct uvc_fh *handle) | |
409 | { | |
410 | return handle->state == UVC_HANDLE_ACTIVE; | |
411 | } | |
412 | ||
413 | /* ------------------------------------------------------------------------ | |
414 | * V4L2 file operations | |
415 | */ | |
416 | ||
bec43661 | 417 | static int uvc_v4l2_open(struct file *file) |
c0efd232 | 418 | { |
35f02a68 | 419 | struct uvc_streaming *stream; |
c0efd232 LP |
420 | struct uvc_fh *handle; |
421 | int ret = 0; | |
422 | ||
423 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); | |
424 | mutex_lock(&uvc_driver.open_mutex); | |
35f02a68 | 425 | stream = video_drvdata(file); |
c0efd232 | 426 | |
35f02a68 | 427 | if (stream->dev->state & UVC_DEV_DISCONNECTED) { |
c0efd232 LP |
428 | ret = -ENODEV; |
429 | goto done; | |
430 | } | |
431 | ||
35f02a68 | 432 | ret = usb_autopm_get_interface(stream->dev->intf); |
c0efd232 LP |
433 | if (ret < 0) |
434 | goto done; | |
435 | ||
436 | /* Create the device handle. */ | |
437 | handle = kzalloc(sizeof *handle, GFP_KERNEL); | |
438 | if (handle == NULL) { | |
35f02a68 | 439 | usb_autopm_put_interface(stream->dev->intf); |
c0efd232 LP |
440 | ret = -ENOMEM; |
441 | goto done; | |
442 | } | |
443 | ||
35f02a68 LP |
444 | if (atomic_inc_return(&stream->dev->users) == 1) { |
445 | ret = uvc_status_start(stream->dev); | |
446 | if (ret < 0) { | |
447 | usb_autopm_put_interface(stream->dev->intf); | |
448 | atomic_dec(&stream->dev->users); | |
04a37e0f LP |
449 | kfree(handle); |
450 | goto done; | |
451 | } | |
452 | } | |
453 | ||
8e113595 | 454 | handle->chain = stream->chain; |
35f02a68 | 455 | handle->stream = stream; |
c0efd232 LP |
456 | handle->state = UVC_HANDLE_PASSIVE; |
457 | file->private_data = handle; | |
458 | ||
35f02a68 | 459 | kref_get(&stream->dev->kref); |
c0efd232 LP |
460 | |
461 | done: | |
462 | mutex_unlock(&uvc_driver.open_mutex); | |
463 | return ret; | |
464 | } | |
465 | ||
bec43661 | 466 | static int uvc_v4l2_release(struct file *file) |
c0efd232 | 467 | { |
c0efd232 | 468 | struct uvc_fh *handle = (struct uvc_fh *)file->private_data; |
35f02a68 | 469 | struct uvc_streaming *stream = handle->stream; |
c0efd232 LP |
470 | |
471 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); | |
472 | ||
473 | /* Only free resources if this is a privileged handle. */ | |
474 | if (uvc_has_privileges(handle)) { | |
35f02a68 | 475 | uvc_video_enable(stream, 0); |
c0efd232 | 476 | |
35f02a68 LP |
477 | mutex_lock(&stream->queue.mutex); |
478 | if (uvc_free_buffers(&stream->queue) < 0) | |
c0efd232 LP |
479 | uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to " |
480 | "free buffers.\n"); | |
35f02a68 | 481 | mutex_unlock(&stream->queue.mutex); |
c0efd232 LP |
482 | } |
483 | ||
484 | /* Release the file handle. */ | |
485 | uvc_dismiss_privileges(handle); | |
486 | kfree(handle); | |
487 | file->private_data = NULL; | |
488 | ||
35f02a68 LP |
489 | if (atomic_dec_return(&stream->dev->users) == 0) |
490 | uvc_status_stop(stream->dev); | |
04a37e0f | 491 | |
35f02a68 LP |
492 | usb_autopm_put_interface(stream->dev->intf); |
493 | kref_put(&stream->dev->kref, uvc_delete); | |
c0efd232 LP |
494 | return 0; |
495 | } | |
496 | ||
069b7479 | 497 | static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) |
c0efd232 LP |
498 | { |
499 | struct video_device *vdev = video_devdata(file); | |
c0efd232 | 500 | struct uvc_fh *handle = (struct uvc_fh *)file->private_data; |
8e113595 | 501 | struct uvc_video_chain *chain = handle->chain; |
35f02a68 | 502 | struct uvc_streaming *stream = handle->stream; |
069b7479 | 503 | long ret = 0; |
c0efd232 | 504 | |
c0efd232 LP |
505 | switch (cmd) { |
506 | /* Query capabilities */ | |
507 | case VIDIOC_QUERYCAP: | |
508 | { | |
509 | struct v4l2_capability *cap = arg; | |
510 | ||
511 | memset(cap, 0, sizeof *cap); | |
d0ebf307 LP |
512 | strlcpy(cap->driver, "uvcvideo", sizeof cap->driver); |
513 | strlcpy(cap->card, vdev->name, sizeof cap->card); | |
35f02a68 | 514 | usb_make_path(stream->dev->udev, |
b12049a2 | 515 | cap->bus_info, sizeof(cap->bus_info)); |
c0efd232 | 516 | cap->version = DRIVER_VERSION_NUMBER; |
35f02a68 | 517 | if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) |
ff924203 LP |
518 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
519 | | V4L2_CAP_STREAMING; | |
520 | else | |
521 | cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | |
522 | | V4L2_CAP_STREAMING; | |
c0efd232 LP |
523 | break; |
524 | } | |
525 | ||
526 | /* Get, Set & Query control */ | |
527 | case VIDIOC_QUERYCTRL: | |
8e113595 | 528 | return uvc_query_v4l2_ctrl(chain, arg); |
c0efd232 LP |
529 | |
530 | case VIDIOC_G_CTRL: | |
531 | { | |
532 | struct v4l2_control *ctrl = arg; | |
533 | struct v4l2_ext_control xctrl; | |
534 | ||
535 | memset(&xctrl, 0, sizeof xctrl); | |
536 | xctrl.id = ctrl->id; | |
537 | ||
8e113595 LP |
538 | ret = uvc_ctrl_begin(chain); |
539 | if (ret < 0) | |
1fcbcc47 RK |
540 | return ret; |
541 | ||
8e113595 LP |
542 | ret = uvc_ctrl_get(chain, &xctrl); |
543 | uvc_ctrl_rollback(chain); | |
c0efd232 LP |
544 | if (ret >= 0) |
545 | ctrl->value = xctrl.value; | |
546 | break; | |
547 | } | |
548 | ||
549 | case VIDIOC_S_CTRL: | |
550 | { | |
551 | struct v4l2_control *ctrl = arg; | |
552 | struct v4l2_ext_control xctrl; | |
553 | ||
554 | memset(&xctrl, 0, sizeof xctrl); | |
555 | xctrl.id = ctrl->id; | |
556 | xctrl.value = ctrl->value; | |
557 | ||
8e113595 LP |
558 | uvc_ctrl_begin(chain); |
559 | if (ret < 0) | |
1fcbcc47 RK |
560 | return ret; |
561 | ||
8e113595 | 562 | ret = uvc_ctrl_set(chain, &xctrl); |
c0efd232 | 563 | if (ret < 0) { |
8e113595 | 564 | uvc_ctrl_rollback(chain); |
c0efd232 LP |
565 | return ret; |
566 | } | |
8e113595 | 567 | ret = uvc_ctrl_commit(chain); |
c0efd232 LP |
568 | break; |
569 | } | |
570 | ||
571 | case VIDIOC_QUERYMENU: | |
8e113595 | 572 | return uvc_v4l2_query_menu(chain, arg); |
c0efd232 LP |
573 | |
574 | case VIDIOC_G_EXT_CTRLS: | |
575 | { | |
576 | struct v4l2_ext_controls *ctrls = arg; | |
577 | struct v4l2_ext_control *ctrl = ctrls->controls; | |
578 | unsigned int i; | |
579 | ||
8e113595 LP |
580 | ret = uvc_ctrl_begin(chain); |
581 | if (ret < 0) | |
1fcbcc47 RK |
582 | return ret; |
583 | ||
c0efd232 | 584 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { |
8e113595 | 585 | ret = uvc_ctrl_get(chain, ctrl); |
c0efd232 | 586 | if (ret < 0) { |
8e113595 | 587 | uvc_ctrl_rollback(chain); |
c0efd232 LP |
588 | ctrls->error_idx = i; |
589 | return ret; | |
590 | } | |
591 | } | |
592 | ctrls->error_idx = 0; | |
8e113595 | 593 | ret = uvc_ctrl_rollback(chain); |
c0efd232 LP |
594 | break; |
595 | } | |
596 | ||
597 | case VIDIOC_S_EXT_CTRLS: | |
598 | case VIDIOC_TRY_EXT_CTRLS: | |
599 | { | |
600 | struct v4l2_ext_controls *ctrls = arg; | |
601 | struct v4l2_ext_control *ctrl = ctrls->controls; | |
602 | unsigned int i; | |
603 | ||
8e113595 | 604 | ret = uvc_ctrl_begin(chain); |
c0efd232 LP |
605 | if (ret < 0) |
606 | return ret; | |
607 | ||
608 | for (i = 0; i < ctrls->count; ++ctrl, ++i) { | |
8e113595 | 609 | ret = uvc_ctrl_set(chain, ctrl); |
c0efd232 | 610 | if (ret < 0) { |
8e113595 | 611 | uvc_ctrl_rollback(chain); |
c0efd232 LP |
612 | ctrls->error_idx = i; |
613 | return ret; | |
614 | } | |
615 | } | |
616 | ||
617 | ctrls->error_idx = 0; | |
618 | ||
619 | if (cmd == VIDIOC_S_EXT_CTRLS) | |
8e113595 | 620 | ret = uvc_ctrl_commit(chain); |
c0efd232 | 621 | else |
8e113595 | 622 | ret = uvc_ctrl_rollback(chain); |
c0efd232 LP |
623 | break; |
624 | } | |
625 | ||
626 | /* Get, Set & Enum input */ | |
627 | case VIDIOC_ENUMINPUT: | |
628 | { | |
8e113595 | 629 | const struct uvc_entity *selector = chain->selector; |
c0efd232 LP |
630 | struct v4l2_input *input = arg; |
631 | struct uvc_entity *iterm = NULL; | |
632 | u32 index = input->index; | |
633 | int pin = 0; | |
634 | ||
635 | if (selector == NULL || | |
8e113595 | 636 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { |
c0efd232 LP |
637 | if (index != 0) |
638 | return -EINVAL; | |
8e113595 | 639 | iterm = list_first_entry(&chain->iterms, |
c0efd232 LP |
640 | struct uvc_entity, chain); |
641 | pin = iterm->id; | |
642 | } else if (pin < selector->selector.bNrInPins) { | |
643 | pin = selector->selector.baSourceID[index]; | |
8e113595 | 644 | list_for_each_entry(iterm, chain->iterms.next, chain) { |
c0efd232 LP |
645 | if (iterm->id == pin) |
646 | break; | |
647 | } | |
648 | } | |
649 | ||
650 | if (iterm == NULL || iterm->id != pin) | |
651 | return -EINVAL; | |
652 | ||
653 | memset(input, 0, sizeof *input); | |
654 | input->index = index; | |
d0ebf307 | 655 | strlcpy(input->name, iterm->name, sizeof input->name); |
b482d923 | 656 | if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) |
c0efd232 LP |
657 | input->type = V4L2_INPUT_TYPE_CAMERA; |
658 | break; | |
659 | } | |
660 | ||
661 | case VIDIOC_G_INPUT: | |
662 | { | |
663 | u8 input; | |
664 | ||
8e113595 LP |
665 | if (chain->selector == NULL || |
666 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
c0efd232 LP |
667 | *(int *)arg = 0; |
668 | break; | |
669 | } | |
670 | ||
8e113595 LP |
671 | ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, |
672 | chain->selector->id, chain->dev->intfnum, | |
b482d923 | 673 | UVC_SU_INPUT_SELECT_CONTROL, &input, 1); |
c0efd232 LP |
674 | if (ret < 0) |
675 | return ret; | |
676 | ||
677 | *(int *)arg = input - 1; | |
678 | break; | |
679 | } | |
680 | ||
681 | case VIDIOC_S_INPUT: | |
682 | { | |
9086c7b9 | 683 | u32 input = *(u32 *)arg + 1; |
c0efd232 LP |
684 | |
685 | if ((ret = uvc_acquire_privileges(handle)) < 0) | |
686 | return ret; | |
687 | ||
8e113595 LP |
688 | if (chain->selector == NULL || |
689 | (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { | |
c0efd232 LP |
690 | if (input != 1) |
691 | return -EINVAL; | |
692 | break; | |
693 | } | |
694 | ||
8e113595 | 695 | if (input == 0 || input > chain->selector->selector.bNrInPins) |
c0efd232 LP |
696 | return -EINVAL; |
697 | ||
8e113595 LP |
698 | return uvc_query_ctrl(chain->dev, UVC_SET_CUR, |
699 | chain->selector->id, chain->dev->intfnum, | |
b482d923 | 700 | UVC_SU_INPUT_SELECT_CONTROL, &input, 1); |
c0efd232 LP |
701 | } |
702 | ||
703 | /* Try, Get, Set & Enum format */ | |
704 | case VIDIOC_ENUM_FMT: | |
705 | { | |
706 | struct v4l2_fmtdesc *fmt = arg; | |
707 | struct uvc_format *format; | |
8bbd90ce MN |
708 | enum v4l2_buf_type type = fmt->type; |
709 | __u32 index = fmt->index; | |
c0efd232 | 710 | |
35f02a68 LP |
711 | if (fmt->type != stream->type || |
712 | fmt->index >= stream->nformats) | |
c0efd232 LP |
713 | return -EINVAL; |
714 | ||
8bbd90ce MN |
715 | memset(fmt, 0, sizeof(*fmt)); |
716 | fmt->index = index; | |
717 | fmt->type = type; | |
718 | ||
35f02a68 | 719 | format = &stream->format[fmt->index]; |
c0efd232 LP |
720 | fmt->flags = 0; |
721 | if (format->flags & UVC_FMT_FLAG_COMPRESSED) | |
722 | fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; | |
d0ebf307 | 723 | strlcpy(fmt->description, format->name, |
c0efd232 LP |
724 | sizeof fmt->description); |
725 | fmt->description[sizeof fmt->description - 1] = 0; | |
726 | fmt->pixelformat = format->fcc; | |
727 | break; | |
728 | } | |
729 | ||
730 | case VIDIOC_TRY_FMT: | |
731 | { | |
732 | struct uvc_streaming_control probe; | |
733 | ||
734 | if ((ret = uvc_acquire_privileges(handle)) < 0) | |
735 | return ret; | |
736 | ||
35f02a68 | 737 | return uvc_v4l2_try_format(stream, arg, &probe, NULL, NULL); |
c0efd232 LP |
738 | } |
739 | ||
740 | case VIDIOC_S_FMT: | |
741 | if ((ret = uvc_acquire_privileges(handle)) < 0) | |
742 | return ret; | |
743 | ||
35f02a68 | 744 | return uvc_v4l2_set_format(stream, arg); |
c0efd232 LP |
745 | |
746 | case VIDIOC_G_FMT: | |
35f02a68 | 747 | return uvc_v4l2_get_format(stream, arg); |
c0efd232 LP |
748 | |
749 | /* Frame size enumeration */ | |
750 | case VIDIOC_ENUM_FRAMESIZES: | |
751 | { | |
752 | struct v4l2_frmsizeenum *fsize = arg; | |
753 | struct uvc_format *format = NULL; | |
754 | struct uvc_frame *frame; | |
755 | int i; | |
756 | ||
757 | /* Look for the given pixel format */ | |
35f02a68 LP |
758 | for (i = 0; i < stream->nformats; i++) { |
759 | if (stream->format[i].fcc == | |
c0efd232 | 760 | fsize->pixel_format) { |
35f02a68 | 761 | format = &stream->format[i]; |
c0efd232 LP |
762 | break; |
763 | } | |
764 | } | |
765 | if (format == NULL) | |
766 | return -EINVAL; | |
767 | ||
768 | if (fsize->index >= format->nframes) | |
769 | return -EINVAL; | |
770 | ||
771 | frame = &format->frame[fsize->index]; | |
772 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
773 | fsize->discrete.width = frame->wWidth; | |
774 | fsize->discrete.height = frame->wHeight; | |
775 | break; | |
776 | } | |
777 | ||
778 | /* Frame interval enumeration */ | |
779 | case VIDIOC_ENUM_FRAMEINTERVALS: | |
780 | { | |
781 | struct v4l2_frmivalenum *fival = arg; | |
782 | struct uvc_format *format = NULL; | |
783 | struct uvc_frame *frame = NULL; | |
784 | int i; | |
785 | ||
786 | /* Look for the given pixel format and frame size */ | |
35f02a68 LP |
787 | for (i = 0; i < stream->nformats; i++) { |
788 | if (stream->format[i].fcc == | |
c0efd232 | 789 | fival->pixel_format) { |
35f02a68 | 790 | format = &stream->format[i]; |
c0efd232 LP |
791 | break; |
792 | } | |
793 | } | |
794 | if (format == NULL) | |
795 | return -EINVAL; | |
796 | ||
797 | for (i = 0; i < format->nframes; i++) { | |
798 | if (format->frame[i].wWidth == fival->width && | |
799 | format->frame[i].wHeight == fival->height) { | |
800 | frame = &format->frame[i]; | |
801 | break; | |
802 | } | |
803 | } | |
804 | if (frame == NULL) | |
805 | return -EINVAL; | |
806 | ||
807 | if (frame->bFrameIntervalType) { | |
808 | if (fival->index >= frame->bFrameIntervalType) | |
809 | return -EINVAL; | |
810 | ||
811 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; | |
812 | fival->discrete.numerator = | |
813 | frame->dwFrameInterval[fival->index]; | |
814 | fival->discrete.denominator = 10000000; | |
815 | uvc_simplify_fraction(&fival->discrete.numerator, | |
816 | &fival->discrete.denominator, 8, 333); | |
817 | } else { | |
818 | fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; | |
819 | fival->stepwise.min.numerator = | |
820 | frame->dwFrameInterval[0]; | |
821 | fival->stepwise.min.denominator = 10000000; | |
822 | fival->stepwise.max.numerator = | |
823 | frame->dwFrameInterval[1]; | |
824 | fival->stepwise.max.denominator = 10000000; | |
825 | fival->stepwise.step.numerator = | |
826 | frame->dwFrameInterval[2]; | |
827 | fival->stepwise.step.denominator = 10000000; | |
828 | uvc_simplify_fraction(&fival->stepwise.min.numerator, | |
829 | &fival->stepwise.min.denominator, 8, 333); | |
830 | uvc_simplify_fraction(&fival->stepwise.max.numerator, | |
831 | &fival->stepwise.max.denominator, 8, 333); | |
832 | uvc_simplify_fraction(&fival->stepwise.step.numerator, | |
833 | &fival->stepwise.step.denominator, 8, 333); | |
834 | } | |
835 | break; | |
836 | } | |
837 | ||
838 | /* Get & Set streaming parameters */ | |
839 | case VIDIOC_G_PARM: | |
35f02a68 | 840 | return uvc_v4l2_get_streamparm(stream, arg); |
c0efd232 LP |
841 | |
842 | case VIDIOC_S_PARM: | |
843 | if ((ret = uvc_acquire_privileges(handle)) < 0) | |
844 | return ret; | |
845 | ||
35f02a68 | 846 | return uvc_v4l2_set_streamparm(stream, arg); |
c0efd232 LP |
847 | |
848 | /* Cropping and scaling */ | |
849 | case VIDIOC_CROPCAP: | |
850 | { | |
851 | struct v4l2_cropcap *ccap = arg; | |
35f02a68 | 852 | struct uvc_frame *frame = stream->cur_frame; |
c0efd232 | 853 | |
35f02a68 | 854 | if (ccap->type != stream->type) |
c0efd232 LP |
855 | return -EINVAL; |
856 | ||
857 | ccap->bounds.left = 0; | |
858 | ccap->bounds.top = 0; | |
859 | ccap->bounds.width = frame->wWidth; | |
860 | ccap->bounds.height = frame->wHeight; | |
861 | ||
862 | ccap->defrect = ccap->bounds; | |
863 | ||
864 | ccap->pixelaspect.numerator = 1; | |
865 | ccap->pixelaspect.denominator = 1; | |
866 | break; | |
867 | } | |
868 | ||
869 | case VIDIOC_G_CROP: | |
870 | case VIDIOC_S_CROP: | |
871 | return -EINVAL; | |
872 | ||
873 | /* Buffers & streaming */ | |
874 | case VIDIOC_REQBUFS: | |
875 | { | |
876 | struct v4l2_requestbuffers *rb = arg; | |
877 | unsigned int bufsize = | |
35f02a68 | 878 | stream->ctrl.dwMaxVideoFrameSize; |
c0efd232 | 879 | |
35f02a68 | 880 | if (rb->type != stream->type || |
c0efd232 LP |
881 | rb->memory != V4L2_MEMORY_MMAP) |
882 | return -EINVAL; | |
883 | ||
884 | if ((ret = uvc_acquire_privileges(handle)) < 0) | |
885 | return ret; | |
886 | ||
35f02a68 | 887 | ret = uvc_alloc_buffers(&stream->queue, rb->count, bufsize); |
c0efd232 LP |
888 | if (ret < 0) |
889 | return ret; | |
890 | ||
c0efd232 LP |
891 | rb->count = ret; |
892 | ret = 0; | |
893 | break; | |
894 | } | |
895 | ||
896 | case VIDIOC_QUERYBUF: | |
897 | { | |
898 | struct v4l2_buffer *buf = arg; | |
899 | ||
35f02a68 | 900 | if (buf->type != stream->type) |
c0efd232 LP |
901 | return -EINVAL; |
902 | ||
903 | if (!uvc_has_privileges(handle)) | |
904 | return -EBUSY; | |
905 | ||
35f02a68 | 906 | return uvc_query_buffer(&stream->queue, buf); |
c0efd232 LP |
907 | } |
908 | ||
909 | case VIDIOC_QBUF: | |
910 | if (!uvc_has_privileges(handle)) | |
911 | return -EBUSY; | |
912 | ||
35f02a68 | 913 | return uvc_queue_buffer(&stream->queue, arg); |
c0efd232 LP |
914 | |
915 | case VIDIOC_DQBUF: | |
916 | if (!uvc_has_privileges(handle)) | |
917 | return -EBUSY; | |
918 | ||
35f02a68 | 919 | return uvc_dequeue_buffer(&stream->queue, arg, |
c0efd232 LP |
920 | file->f_flags & O_NONBLOCK); |
921 | ||
922 | case VIDIOC_STREAMON: | |
923 | { | |
924 | int *type = arg; | |
925 | ||
35f02a68 | 926 | if (*type != stream->type) |
c0efd232 LP |
927 | return -EINVAL; |
928 | ||
929 | if (!uvc_has_privileges(handle)) | |
930 | return -EBUSY; | |
931 | ||
35f02a68 LP |
932 | ret = uvc_video_enable(stream, 1); |
933 | if (ret < 0) | |
c0efd232 LP |
934 | return ret; |
935 | break; | |
936 | } | |
937 | ||
938 | case VIDIOC_STREAMOFF: | |
939 | { | |
940 | int *type = arg; | |
941 | ||
35f02a68 | 942 | if (*type != stream->type) |
c0efd232 LP |
943 | return -EINVAL; |
944 | ||
945 | if (!uvc_has_privileges(handle)) | |
946 | return -EBUSY; | |
947 | ||
35f02a68 | 948 | return uvc_video_enable(stream, 0); |
c0efd232 LP |
949 | } |
950 | ||
951 | /* Analog video standards make no sense for digital cameras. */ | |
952 | case VIDIOC_ENUMSTD: | |
953 | case VIDIOC_QUERYSTD: | |
954 | case VIDIOC_G_STD: | |
955 | case VIDIOC_S_STD: | |
956 | ||
957 | case VIDIOC_OVERLAY: | |
958 | ||
959 | case VIDIOC_ENUMAUDIO: | |
960 | case VIDIOC_ENUMAUDOUT: | |
961 | ||
962 | case VIDIOC_ENUMOUTPUT: | |
963 | uvc_trace(UVC_TRACE_IOCTL, "Unsupported ioctl 0x%08x\n", cmd); | |
964 | return -EINVAL; | |
965 | ||
966 | /* Dynamic controls. */ | |
967 | case UVCIOC_CTRL_ADD: | |
968 | { | |
969 | struct uvc_xu_control_info *xinfo = arg; | |
970 | struct uvc_control_info *info; | |
971 | ||
972 | if (!capable(CAP_SYS_ADMIN)) | |
973 | return -EPERM; | |
974 | ||
9768352a | 975 | info = kzalloc(sizeof *info, GFP_KERNEL); |
c0efd232 LP |
976 | if (info == NULL) |
977 | return -ENOMEM; | |
978 | ||
979 | memcpy(info->entity, xinfo->entity, sizeof info->entity); | |
980 | info->index = xinfo->index; | |
981 | info->selector = xinfo->selector; | |
982 | info->size = xinfo->size; | |
983 | info->flags = xinfo->flags; | |
984 | ||
985 | info->flags |= UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX | | |
986 | UVC_CONTROL_GET_RES | UVC_CONTROL_GET_DEF; | |
987 | ||
988 | ret = uvc_ctrl_add_info(info); | |
989 | if (ret < 0) | |
990 | kfree(info); | |
991 | break; | |
992 | } | |
993 | ||
994 | case UVCIOC_CTRL_MAP: | |
995 | { | |
996 | struct uvc_xu_control_mapping *xmap = arg; | |
997 | struct uvc_control_mapping *map; | |
998 | ||
999 | if (!capable(CAP_SYS_ADMIN)) | |
1000 | return -EPERM; | |
1001 | ||
9768352a | 1002 | map = kzalloc(sizeof *map, GFP_KERNEL); |
c0efd232 LP |
1003 | if (map == NULL) |
1004 | return -ENOMEM; | |
1005 | ||
1006 | map->id = xmap->id; | |
1007 | memcpy(map->name, xmap->name, sizeof map->name); | |
1008 | memcpy(map->entity, xmap->entity, sizeof map->entity); | |
1009 | map->selector = xmap->selector; | |
1010 | map->size = xmap->size; | |
1011 | map->offset = xmap->offset; | |
1012 | map->v4l2_type = xmap->v4l2_type; | |
1013 | map->data_type = xmap->data_type; | |
1014 | ||
1015 | ret = uvc_ctrl_add_mapping(map); | |
1016 | if (ret < 0) | |
1017 | kfree(map); | |
1018 | break; | |
1019 | } | |
1020 | ||
1021 | case UVCIOC_CTRL_GET: | |
8e113595 | 1022 | return uvc_xu_ctrl_query(chain, arg, 0); |
c0efd232 LP |
1023 | |
1024 | case UVCIOC_CTRL_SET: | |
8e113595 | 1025 | return uvc_xu_ctrl_query(chain, arg, 1); |
c0efd232 LP |
1026 | |
1027 | default: | |
b1f88407 | 1028 | if ((ret = v4l_compat_translate_ioctl(file, cmd, arg, |
f473bf76 | 1029 | uvc_v4l2_do_ioctl)) == -ENOIOCTLCMD) |
c0efd232 LP |
1030 | uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", |
1031 | cmd); | |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | return ret; | |
1036 | } | |
1037 | ||
069b7479 | 1038 | static long uvc_v4l2_ioctl(struct file *file, |
c0efd232 LP |
1039 | unsigned int cmd, unsigned long arg) |
1040 | { | |
308bb52c LP |
1041 | if (uvc_trace_param & UVC_TRACE_IOCTL) { |
1042 | uvc_printk(KERN_DEBUG, "uvc_v4l2_ioctl("); | |
1043 | v4l_printk_ioctl(cmd); | |
1044 | printk(")\n"); | |
1045 | } | |
1046 | ||
f473bf76 | 1047 | return video_usercopy(file, cmd, arg, uvc_v4l2_do_ioctl); |
c0efd232 LP |
1048 | } |
1049 | ||
1050 | static ssize_t uvc_v4l2_read(struct file *file, char __user *data, | |
1051 | size_t count, loff_t *ppos) | |
1052 | { | |
1053 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); | |
1054 | return -ENODEV; | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * VMA operations. | |
1059 | */ | |
1060 | static void uvc_vm_open(struct vm_area_struct *vma) | |
1061 | { | |
1062 | struct uvc_buffer *buffer = vma->vm_private_data; | |
1063 | buffer->vma_use_count++; | |
1064 | } | |
1065 | ||
1066 | static void uvc_vm_close(struct vm_area_struct *vma) | |
1067 | { | |
1068 | struct uvc_buffer *buffer = vma->vm_private_data; | |
1069 | buffer->vma_use_count--; | |
1070 | } | |
1071 | ||
f0f37e2f | 1072 | static const struct vm_operations_struct uvc_vm_ops = { |
c0efd232 LP |
1073 | .open = uvc_vm_open, |
1074 | .close = uvc_vm_close, | |
1075 | }; | |
1076 | ||
1077 | static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) | |
1078 | { | |
35f02a68 LP |
1079 | struct uvc_fh *handle = (struct uvc_fh *)file->private_data; |
1080 | struct uvc_streaming *stream = handle->stream; | |
1081 | struct uvc_video_queue *queue = &stream->queue; | |
6f80e1b4 | 1082 | struct uvc_buffer *uninitialized_var(buffer); |
c0efd232 LP |
1083 | struct page *page; |
1084 | unsigned long addr, start, size; | |
1085 | unsigned int i; | |
1086 | int ret = 0; | |
1087 | ||
1088 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); | |
1089 | ||
1090 | start = vma->vm_start; | |
1091 | size = vma->vm_end - vma->vm_start; | |
1092 | ||
35f02a68 | 1093 | mutex_lock(&queue->mutex); |
c0efd232 | 1094 | |
35f02a68 LP |
1095 | for (i = 0; i < queue->count; ++i) { |
1096 | buffer = &queue->buffer[i]; | |
c0efd232 LP |
1097 | if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) |
1098 | break; | |
1099 | } | |
1100 | ||
35f02a68 | 1101 | if (i == queue->count || size != queue->buf_size) { |
c0efd232 LP |
1102 | ret = -EINVAL; |
1103 | goto done; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * VM_IO marks the area as being an mmaped region for I/O to a | |
1108 | * device. It also prevents the region from being core dumped. | |
1109 | */ | |
1110 | vma->vm_flags |= VM_IO; | |
1111 | ||
35f02a68 | 1112 | addr = (unsigned long)queue->mem + buffer->buf.m.offset; |
c0efd232 LP |
1113 | while (size > 0) { |
1114 | page = vmalloc_to_page((void *)addr); | |
1115 | if ((ret = vm_insert_page(vma, start, page)) < 0) | |
1116 | goto done; | |
1117 | ||
1118 | start += PAGE_SIZE; | |
1119 | addr += PAGE_SIZE; | |
1120 | size -= PAGE_SIZE; | |
1121 | } | |
1122 | ||
1123 | vma->vm_ops = &uvc_vm_ops; | |
1124 | vma->vm_private_data = buffer; | |
1125 | uvc_vm_open(vma); | |
1126 | ||
1127 | done: | |
35f02a68 | 1128 | mutex_unlock(&queue->mutex); |
c0efd232 LP |
1129 | return ret; |
1130 | } | |
1131 | ||
1132 | static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) | |
1133 | { | |
35f02a68 LP |
1134 | struct uvc_fh *handle = (struct uvc_fh *)file->private_data; |
1135 | struct uvc_streaming *stream = handle->stream; | |
c0efd232 LP |
1136 | |
1137 | uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); | |
1138 | ||
35f02a68 | 1139 | return uvc_queue_poll(&stream->queue, file, wait); |
c0efd232 LP |
1140 | } |
1141 | ||
bec43661 | 1142 | const struct v4l2_file_operations uvc_fops = { |
c0efd232 LP |
1143 | .owner = THIS_MODULE, |
1144 | .open = uvc_v4l2_open, | |
1145 | .release = uvc_v4l2_release, | |
1146 | .ioctl = uvc_v4l2_ioctl, | |
c0efd232 LP |
1147 | .read = uvc_v4l2_read, |
1148 | .mmap = uvc_v4l2_mmap, | |
1149 | .poll = uvc_v4l2_poll, | |
1150 | }; | |
f87086e3 | 1151 |