1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * uvc_driver.c -- USB Video Class driver
4 *
5 * Copyright (C) 2005-2010
6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 */
8
9 #include <linux/atomic.h>
10 #include <linux/kernel.h>
11 #include <linux/list.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/usb.h>
15 #include <linux/videodev2.h>
16 #include <linux/vmalloc.h>
17 #include <linux/wait.h>
18 #include <linux/version.h>
19 #include <asm/unaligned.h>
20
21 #include <media/v4l2-common.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/v4l2-uvc.h>
24
25 #include "uvcvideo.h"
26
27 #define DRIVER_AUTHOR "Laurent Pinchart " \
28 "<laurent.pinchart@ideasonboard.com>"
29 #define DRIVER_DESC "USB Video Class driver"
30
31 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
32 unsigned int uvc_hw_timestamps_param;
33 unsigned int uvc_no_drop_param;
34 static unsigned int uvc_quirks_param = -1;
35 unsigned int uvc_trace_param;
36 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
37
38 /* ------------------------------------------------------------------------
39 * Utility functions
40 */
41
uvc_find_endpoint(struct usb_host_interface * alts,u8 epaddr)42 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
43 u8 epaddr)
44 {
45 struct usb_host_endpoint *ep;
46 unsigned int i;
47
48 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
49 ep = &alts->endpoint[i];
50 if (ep->desc.bEndpointAddress == epaddr)
51 return ep;
52 }
53
54 return NULL;
55 }
56
uvc_colorspace(const u8 primaries)57 static enum v4l2_colorspace uvc_colorspace(const u8 primaries)
58 {
59 static const enum v4l2_colorspace colorprimaries[] = {
60 V4L2_COLORSPACE_DEFAULT, /* Unspecified */
61 V4L2_COLORSPACE_SRGB,
62 V4L2_COLORSPACE_470_SYSTEM_M,
63 V4L2_COLORSPACE_470_SYSTEM_BG,
64 V4L2_COLORSPACE_SMPTE170M,
65 V4L2_COLORSPACE_SMPTE240M,
66 };
67
68 if (primaries < ARRAY_SIZE(colorprimaries))
69 return colorprimaries[primaries];
70
71 return V4L2_COLORSPACE_DEFAULT; /* Reserved */
72 }
73
uvc_xfer_func(const u8 transfer_characteristics)74 static enum v4l2_xfer_func uvc_xfer_func(const u8 transfer_characteristics)
75 {
76 /*
77 * V4L2 does not currently have definitions for all possible values of
78 * UVC transfer characteristics. If v4l2_xfer_func is extended with new
79 * values, the mapping below should be updated.
80 *
81 * Substitutions are taken from the mapping given for
82 * V4L2_XFER_FUNC_DEFAULT documented in videodev2.h.
83 */
84 static const enum v4l2_xfer_func xfer_funcs[] = {
85 V4L2_XFER_FUNC_DEFAULT, /* Unspecified */
86 V4L2_XFER_FUNC_709,
87 V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 M */
88 V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 B, G */
89 V4L2_XFER_FUNC_709, /* Substitution for SMPTE 170M */
90 V4L2_XFER_FUNC_SMPTE240M,
91 V4L2_XFER_FUNC_NONE,
92 V4L2_XFER_FUNC_SRGB,
93 };
94
95 if (transfer_characteristics < ARRAY_SIZE(xfer_funcs))
96 return xfer_funcs[transfer_characteristics];
97
98 return V4L2_XFER_FUNC_DEFAULT; /* Reserved */
99 }
100
uvc_ycbcr_enc(const u8 matrix_coefficients)101 static enum v4l2_ycbcr_encoding uvc_ycbcr_enc(const u8 matrix_coefficients)
102 {
103 /*
104 * V4L2 does not currently have definitions for all possible values of
105 * UVC matrix coefficients. If v4l2_ycbcr_encoding is extended with new
106 * values, the mapping below should be updated.
107 *
108 * Substitutions are taken from the mapping given for
109 * V4L2_YCBCR_ENC_DEFAULT documented in videodev2.h.
110 *
111 * FCC is assumed to be close enough to 601.
112 */
113 static const enum v4l2_ycbcr_encoding ycbcr_encs[] = {
114 V4L2_YCBCR_ENC_DEFAULT, /* Unspecified */
115 V4L2_YCBCR_ENC_709,
116 V4L2_YCBCR_ENC_601, /* Substitution for FCC */
117 V4L2_YCBCR_ENC_601, /* Substitution for BT.470-2 B, G */
118 V4L2_YCBCR_ENC_601,
119 V4L2_YCBCR_ENC_SMPTE240M,
120 };
121
122 if (matrix_coefficients < ARRAY_SIZE(ycbcr_encs))
123 return ycbcr_encs[matrix_coefficients];
124
125 return V4L2_YCBCR_ENC_DEFAULT; /* Reserved */
126 }
127
128 /* ------------------------------------------------------------------------
129 * Terminal and unit management
130 */
131
uvc_entity_by_id(struct uvc_device * dev,int id)132 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
133 {
134 struct uvc_entity *entity;
135
136 list_for_each_entry(entity, &dev->entities, list) {
137 if (entity->id == id)
138 return entity;
139 }
140
141 return NULL;
142 }
143
uvc_entity_by_reference(struct uvc_device * dev,int id,struct uvc_entity * entity)144 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
145 int id, struct uvc_entity *entity)
146 {
147 unsigned int i;
148
149 if (entity == NULL)
150 entity = list_entry(&dev->entities, struct uvc_entity, list);
151
152 list_for_each_entry_continue(entity, &dev->entities, list) {
153 for (i = 0; i < entity->bNrInPins; ++i)
154 if (entity->baSourceID[i] == id)
155 return entity;
156 }
157
158 return NULL;
159 }
160
uvc_stream_by_id(struct uvc_device * dev,int id)161 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
162 {
163 struct uvc_streaming *stream;
164
165 list_for_each_entry(stream, &dev->streams, list) {
166 if (stream->header.bTerminalLink == id)
167 return stream;
168 }
169
170 return NULL;
171 }
172
173 /* ------------------------------------------------------------------------
174 * Streaming Object Management
175 */
176
uvc_stream_delete(struct uvc_streaming * stream)177 static void uvc_stream_delete(struct uvc_streaming *stream)
178 {
179 if (stream->async_wq)
180 destroy_workqueue(stream->async_wq);
181
182 mutex_destroy(&stream->mutex);
183
184 usb_put_intf(stream->intf);
185
186 kfree(stream->format);
187 kfree(stream->header.bmaControls);
188 kfree(stream);
189 }
190
uvc_stream_new(struct uvc_device * dev,struct usb_interface * intf)191 static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev,
192 struct usb_interface *intf)
193 {
194 struct uvc_streaming *stream;
195
196 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
197 if (stream == NULL)
198 return NULL;
199
200 mutex_init(&stream->mutex);
201
202 stream->dev = dev;
203 stream->intf = usb_get_intf(intf);
204 stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
205
206 /* Allocate a stream specific work queue for asynchronous tasks. */
207 stream->async_wq = alloc_workqueue("uvcvideo", WQ_UNBOUND | WQ_HIGHPRI,
208 0);
209 if (!stream->async_wq) {
210 uvc_stream_delete(stream);
211 return NULL;
212 }
213
214 return stream;
215 }
216
217 /* ------------------------------------------------------------------------
218 * Descriptors parsing
219 */
220
uvc_parse_format(struct uvc_device * dev,struct uvc_streaming * streaming,struct uvc_format * format,u32 ** intervals,unsigned char * buffer,int buflen)221 static int uvc_parse_format(struct uvc_device *dev,
222 struct uvc_streaming *streaming, struct uvc_format *format,
223 u32 **intervals, unsigned char *buffer, int buflen)
224 {
225 struct usb_interface *intf = streaming->intf;
226 struct usb_host_interface *alts = intf->cur_altsetting;
227 struct uvc_format_desc *fmtdesc;
228 struct uvc_frame *frame;
229 const unsigned char *start = buffer;
230 unsigned int width_multiplier = 1;
231 unsigned int interval;
232 unsigned int i, n;
233 u8 ftype;
234
235 format->type = buffer[2];
236 format->index = buffer[3];
237
238 switch (buffer[2]) {
239 case UVC_VS_FORMAT_UNCOMPRESSED:
240 case UVC_VS_FORMAT_FRAME_BASED:
241 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
242 if (buflen < n) {
243 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
244 "interface %d FORMAT error\n",
245 dev->udev->devnum,
246 alts->desc.bInterfaceNumber);
247 return -EINVAL;
248 }
249
250 /* Find the format descriptor from its GUID. */
251 fmtdesc = uvc_format_by_guid(&buffer[5]);
252
253 if (fmtdesc != NULL) {
254 strscpy(format->name, fmtdesc->name,
255 sizeof(format->name));
256 format->fcc = fmtdesc->fcc;
257 } else {
258 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
259 &buffer[5]);
260 snprintf(format->name, sizeof(format->name), "%pUl\n",
261 &buffer[5]);
262 format->fcc = 0;
263 }
264
265 format->bpp = buffer[21];
266
267 /* Some devices report a format that doesn't match what they
268 * really send.
269 */
270 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
271 if (format->fcc == V4L2_PIX_FMT_YUYV) {
272 strscpy(format->name, "Greyscale 8-bit (Y8 )",
273 sizeof(format->name));
274 format->fcc = V4L2_PIX_FMT_GREY;
275 format->bpp = 8;
276 width_multiplier = 2;
277 }
278 }
279
280 /* Some devices report bpp that doesn't match the format. */
281 if (dev->quirks & UVC_QUIRK_FORCE_BPP) {
282 const struct v4l2_format_info *info =
283 v4l2_format_info(format->fcc);
284
285 if (info) {
286 unsigned int div = info->hdiv * info->vdiv;
287
288 n = info->bpp[0] * div;
289 for (i = 1; i < info->comp_planes; i++)
290 n += info->bpp[i];
291
292 format->bpp = DIV_ROUND_UP(8 * n, div);
293 }
294 }
295
296 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
297 ftype = UVC_VS_FRAME_UNCOMPRESSED;
298 } else {
299 ftype = UVC_VS_FRAME_FRAME_BASED;
300 if (buffer[27])
301 format->flags = UVC_FMT_FLAG_COMPRESSED;
302 }
303 break;
304
305 case UVC_VS_FORMAT_MJPEG:
306 if (buflen < 11) {
307 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
308 "interface %d FORMAT error\n",
309 dev->udev->devnum,
310 alts->desc.bInterfaceNumber);
311 return -EINVAL;
312 }
313
314 strscpy(format->name, "MJPEG", sizeof(format->name));
315 format->fcc = V4L2_PIX_FMT_MJPEG;
316 format->flags = UVC_FMT_FLAG_COMPRESSED;
317 format->bpp = 0;
318 ftype = UVC_VS_FRAME_MJPEG;
319 break;
320
321 case UVC_VS_FORMAT_DV:
322 if (buflen < 9) {
323 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
324 "interface %d FORMAT error\n",
325 dev->udev->devnum,
326 alts->desc.bInterfaceNumber);
327 return -EINVAL;
328 }
329
330 switch (buffer[8] & 0x7f) {
331 case 0:
332 strscpy(format->name, "SD-DV", sizeof(format->name));
333 break;
334 case 1:
335 strscpy(format->name, "SDL-DV", sizeof(format->name));
336 break;
337 case 2:
338 strscpy(format->name, "HD-DV", sizeof(format->name));
339 break;
340 default:
341 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
342 "interface %d: unknown DV format %u\n",
343 dev->udev->devnum,
344 alts->desc.bInterfaceNumber, buffer[8]);
345 return -EINVAL;
346 }
347
348 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
349 sizeof(format->name));
350
351 format->fcc = V4L2_PIX_FMT_DV;
352 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
353 format->bpp = 0;
354 ftype = 0;
355
356 /* Create a dummy frame descriptor. */
357 frame = &format->frame[0];
358 memset(&format->frame[0], 0, sizeof(format->frame[0]));
359 frame->bFrameIntervalType = 1;
360 frame->dwDefaultFrameInterval = 1;
361 frame->dwFrameInterval = *intervals;
362 *(*intervals)++ = 1;
363 format->nframes = 1;
364 break;
365
366 case UVC_VS_FORMAT_MPEG2TS:
367 case UVC_VS_FORMAT_STREAM_BASED:
368 /* Not supported yet. */
369 default:
370 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
371 "interface %d unsupported format %u\n",
372 dev->udev->devnum, alts->desc.bInterfaceNumber,
373 buffer[2]);
374 return -EINVAL;
375 }
376
377 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
378
379 buflen -= buffer[0];
380 buffer += buffer[0];
381
382 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
383 * based formats have frame descriptors.
384 */
385 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
386 buffer[2] == ftype) {
387 frame = &format->frame[format->nframes];
388 if (ftype != UVC_VS_FRAME_FRAME_BASED)
389 n = buflen > 25 ? buffer[25] : 0;
390 else
391 n = buflen > 21 ? buffer[21] : 0;
392
393 n = n ? n : 3;
394
395 if (buflen < 26 + 4*n) {
396 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
397 "interface %d FRAME error\n", dev->udev->devnum,
398 alts->desc.bInterfaceNumber);
399 return -EINVAL;
400 }
401
402 frame->bFrameIndex = buffer[3];
403 frame->bmCapabilities = buffer[4];
404 frame->wWidth = get_unaligned_le16(&buffer[5])
405 * width_multiplier;
406 frame->wHeight = get_unaligned_le16(&buffer[7]);
407 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
408 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
409 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
410 frame->dwMaxVideoFrameBufferSize =
411 get_unaligned_le32(&buffer[17]);
412 frame->dwDefaultFrameInterval =
413 get_unaligned_le32(&buffer[21]);
414 frame->bFrameIntervalType = buffer[25];
415 } else {
416 frame->dwMaxVideoFrameBufferSize = 0;
417 frame->dwDefaultFrameInterval =
418 get_unaligned_le32(&buffer[17]);
419 frame->bFrameIntervalType = buffer[21];
420 }
421 frame->dwFrameInterval = *intervals;
422
423 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
424 * completely. Observed behaviours range from setting the
425 * value to 1.1x the actual frame size to hardwiring the
426 * 16 low bits to 0. This results in a higher than necessary
427 * memory usage as well as a wrong image size information. For
428 * uncompressed formats this can be fixed by computing the
429 * value from the frame size.
430 */
431 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
432 frame->dwMaxVideoFrameBufferSize = format->bpp
433 * frame->wWidth * frame->wHeight / 8;
434
435 /* Some bogus devices report dwMinFrameInterval equal to
436 * dwMaxFrameInterval and have dwFrameIntervalStep set to
437 * zero. Setting all null intervals to 1 fixes the problem and
438 * some other divisions by zero that could happen.
439 */
440 for (i = 0; i < n; ++i) {
441 interval = get_unaligned_le32(&buffer[26+4*i]);
442 *(*intervals)++ = interval ? interval : 1;
443 }
444
445 /* Make sure that the default frame interval stays between
446 * the boundaries.
447 */
448 n -= frame->bFrameIntervalType ? 1 : 2;
449 frame->dwDefaultFrameInterval =
450 min(frame->dwFrameInterval[n],
451 max(frame->dwFrameInterval[0],
452 frame->dwDefaultFrameInterval));
453
454 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
455 frame->bFrameIntervalType = 1;
456 frame->dwFrameInterval[0] =
457 frame->dwDefaultFrameInterval;
458 }
459
460 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
461 frame->wWidth, frame->wHeight,
462 10000000/frame->dwDefaultFrameInterval,
463 (100000000/frame->dwDefaultFrameInterval)%10);
464
465 format->nframes++;
466 buflen -= buffer[0];
467 buffer += buffer[0];
468 }
469
470 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
471 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
472 buflen -= buffer[0];
473 buffer += buffer[0];
474 }
475
476 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
477 buffer[2] == UVC_VS_COLORFORMAT) {
478 if (buflen < 6) {
479 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
480 "interface %d COLORFORMAT error\n",
481 dev->udev->devnum,
482 alts->desc.bInterfaceNumber);
483 return -EINVAL;
484 }
485
486 format->colorspace = uvc_colorspace(buffer[3]);
487 format->xfer_func = uvc_xfer_func(buffer[4]);
488 format->ycbcr_enc = uvc_ycbcr_enc(buffer[5]);
489
490 buflen -= buffer[0];
491 buffer += buffer[0];
492 }
493
494 return buffer - start;
495 }
496
uvc_parse_streaming(struct uvc_device * dev,struct usb_interface * intf)497 static int uvc_parse_streaming(struct uvc_device *dev,
498 struct usb_interface *intf)
499 {
500 struct uvc_streaming *streaming = NULL;
501 struct uvc_format *format;
502 struct uvc_frame *frame;
503 struct usb_host_interface *alts = &intf->altsetting[0];
504 unsigned char *_buffer, *buffer = alts->extra;
505 int _buflen, buflen = alts->extralen;
506 unsigned int nformats = 0, nframes = 0, nintervals = 0;
507 unsigned int size, i, n, p;
508 u32 *interval;
509 u16 psize;
510 int ret = -EINVAL;
511
512 if (intf->cur_altsetting->desc.bInterfaceSubClass
513 != UVC_SC_VIDEOSTREAMING) {
514 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
515 "video streaming interface\n", dev->udev->devnum,
516 intf->altsetting[0].desc.bInterfaceNumber);
517 return -EINVAL;
518 }
519
520 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
521 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
522 "claimed\n", dev->udev->devnum,
523 intf->altsetting[0].desc.bInterfaceNumber);
524 return -EINVAL;
525 }
526
527 streaming = uvc_stream_new(dev, intf);
528 if (streaming == NULL) {
529 usb_driver_release_interface(&uvc_driver.driver, intf);
530 return -ENOMEM;
531 }
532
533 /* The Pico iMage webcam has its class-specific interface descriptors
534 * after the endpoint descriptors.
535 */
536 if (buflen == 0) {
537 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
538 struct usb_host_endpoint *ep = &alts->endpoint[i];
539
540 if (ep->extralen == 0)
541 continue;
542
543 if (ep->extralen > 2 &&
544 ep->extra[1] == USB_DT_CS_INTERFACE) {
545 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
546 "from endpoint %u.\n", i);
547 buffer = alts->endpoint[i].extra;
548 buflen = alts->endpoint[i].extralen;
549 break;
550 }
551 }
552 }
553
554 /* Skip the standard interface descriptors. */
555 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
556 buflen -= buffer[0];
557 buffer += buffer[0];
558 }
559
560 if (buflen <= 2) {
561 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
562 "interface descriptors found.\n");
563 goto error;
564 }
565
566 /* Parse the header descriptor. */
567 switch (buffer[2]) {
568 case UVC_VS_OUTPUT_HEADER:
569 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
570 size = 9;
571 break;
572
573 case UVC_VS_INPUT_HEADER:
574 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
575 size = 13;
576 break;
577
578 default:
579 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
580 "%d HEADER descriptor not found.\n", dev->udev->devnum,
581 alts->desc.bInterfaceNumber);
582 goto error;
583 }
584
585 p = buflen >= 4 ? buffer[3] : 0;
586 n = buflen >= size ? buffer[size-1] : 0;
587
588 if (buflen < size + p*n) {
589 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
590 "interface %d HEADER descriptor is invalid.\n",
591 dev->udev->devnum, alts->desc.bInterfaceNumber);
592 goto error;
593 }
594
595 streaming->header.bNumFormats = p;
596 streaming->header.bEndpointAddress = buffer[6];
597 if (buffer[2] == UVC_VS_INPUT_HEADER) {
598 streaming->header.bmInfo = buffer[7];
599 streaming->header.bTerminalLink = buffer[8];
600 streaming->header.bStillCaptureMethod = buffer[9];
601 streaming->header.bTriggerSupport = buffer[10];
602 streaming->header.bTriggerUsage = buffer[11];
603 } else {
604 streaming->header.bTerminalLink = buffer[7];
605 }
606 streaming->header.bControlSize = n;
607
608 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
609 GFP_KERNEL);
610 if (streaming->header.bmaControls == NULL) {
611 ret = -ENOMEM;
612 goto error;
613 }
614
615 buflen -= buffer[0];
616 buffer += buffer[0];
617
618 _buffer = buffer;
619 _buflen = buflen;
620
621 /* Count the format and frame descriptors. */
622 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
623 switch (_buffer[2]) {
624 case UVC_VS_FORMAT_UNCOMPRESSED:
625 case UVC_VS_FORMAT_MJPEG:
626 case UVC_VS_FORMAT_FRAME_BASED:
627 nformats++;
628 break;
629
630 case UVC_VS_FORMAT_DV:
631 /* DV format has no frame descriptor. We will create a
632 * dummy frame descriptor with a dummy frame interval.
633 */
634 nformats++;
635 nframes++;
636 nintervals++;
637 break;
638
639 case UVC_VS_FORMAT_MPEG2TS:
640 case UVC_VS_FORMAT_STREAM_BASED:
641 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
642 "interface %d FORMAT %u is not supported.\n",
643 dev->udev->devnum,
644 alts->desc.bInterfaceNumber, _buffer[2]);
645 break;
646
647 case UVC_VS_FRAME_UNCOMPRESSED:
648 case UVC_VS_FRAME_MJPEG:
649 nframes++;
650 if (_buflen > 25)
651 nintervals += _buffer[25] ? _buffer[25] : 3;
652 break;
653
654 case UVC_VS_FRAME_FRAME_BASED:
655 nframes++;
656 if (_buflen > 21)
657 nintervals += _buffer[21] ? _buffer[21] : 3;
658 break;
659 }
660
661 _buflen -= _buffer[0];
662 _buffer += _buffer[0];
663 }
664
665 if (nformats == 0) {
666 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
667 "%d has no supported formats defined.\n",
668 dev->udev->devnum, alts->desc.bInterfaceNumber);
669 goto error;
670 }
671
672 size = nformats * sizeof(*format) + nframes * sizeof(*frame)
673 + nintervals * sizeof(*interval);
674 format = kzalloc(size, GFP_KERNEL);
675 if (format == NULL) {
676 ret = -ENOMEM;
677 goto error;
678 }
679
680 frame = (struct uvc_frame *)&format[nformats];
681 interval = (u32 *)&frame[nframes];
682
683 streaming->format = format;
684 streaming->nformats = nformats;
685
686 /* Parse the format descriptors. */
687 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
688 switch (buffer[2]) {
689 case UVC_VS_FORMAT_UNCOMPRESSED:
690 case UVC_VS_FORMAT_MJPEG:
691 case UVC_VS_FORMAT_DV:
692 case UVC_VS_FORMAT_FRAME_BASED:
693 format->frame = frame;
694 ret = uvc_parse_format(dev, streaming, format,
695 &interval, buffer, buflen);
696 if (ret < 0)
697 goto error;
698
699 frame += format->nframes;
700 format++;
701
702 buflen -= ret;
703 buffer += ret;
704 continue;
705
706 default:
707 break;
708 }
709
710 buflen -= buffer[0];
711 buffer += buffer[0];
712 }
713
714 if (buflen)
715 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
716 "%d has %u bytes of trailing descriptor garbage.\n",
717 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
718
719 /* Parse the alternate settings to find the maximum bandwidth. */
720 for (i = 0; i < intf->num_altsetting; ++i) {
721 struct usb_host_endpoint *ep;
722 alts = &intf->altsetting[i];
723 ep = uvc_find_endpoint(alts,
724 streaming->header.bEndpointAddress);
725 if (ep == NULL)
726 continue;
727
728 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
729 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
730 if (psize > streaming->maxpsize)
731 streaming->maxpsize = psize;
732 }
733
734 list_add_tail(&streaming->list, &dev->streams);
735 return 0;
736
737 error:
738 usb_driver_release_interface(&uvc_driver.driver, intf);
739 uvc_stream_delete(streaming);
740 return ret;
741 }
742
uvc_alloc_entity(u16 type,u8 id,unsigned int num_pads,unsigned int extra_size)743 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
744 unsigned int num_pads, unsigned int extra_size)
745 {
746 struct uvc_entity *entity;
747 unsigned int num_inputs;
748 unsigned int size;
749 unsigned int i;
750
751 extra_size = roundup(extra_size, sizeof(*entity->pads));
752 if (num_pads)
753 num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
754 else
755 num_inputs = 0;
756 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
757 + num_inputs;
758 entity = kzalloc(size, GFP_KERNEL);
759 if (entity == NULL)
760 return NULL;
761
762 entity->id = id;
763 entity->type = type;
764
765 entity->num_links = 0;
766 entity->num_pads = num_pads;
767 entity->pads = ((void *)(entity + 1)) + extra_size;
768
769 for (i = 0; i < num_inputs; ++i)
770 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
771 if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
772 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
773
774 entity->bNrInPins = num_inputs;
775 entity->baSourceID = (u8 *)(&entity->pads[num_pads]);
776
777 return entity;
778 }
779
780 /* Parse vendor-specific extensions. */
uvc_parse_vendor_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)781 static int uvc_parse_vendor_control(struct uvc_device *dev,
782 const unsigned char *buffer, int buflen)
783 {
784 struct usb_device *udev = dev->udev;
785 struct usb_host_interface *alts = dev->intf->cur_altsetting;
786 struct uvc_entity *unit;
787 unsigned int n, p;
788 int handled = 0;
789
790 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
791 case 0x046d: /* Logitech */
792 if (buffer[1] != 0x41 || buffer[2] != 0x01)
793 break;
794
795 /* Logitech implements several vendor specific functions
796 * through vendor specific extension units (LXU).
797 *
798 * The LXU descriptors are similar to XU descriptors
799 * (see "USB Device Video Class for Video Devices", section
800 * 3.7.2.6 "Extension Unit Descriptor") with the following
801 * differences:
802 *
803 * ----------------------------------------------------------
804 * 0 bLength 1 Number
805 * Size of this descriptor, in bytes: 24+p+n*2
806 * ----------------------------------------------------------
807 * 23+p+n bmControlsType N Bitmap
808 * Individual bits in the set are defined:
809 * 0: Absolute
810 * 1: Relative
811 *
812 * This bitset is mapped exactly the same as bmControls.
813 * ----------------------------------------------------------
814 * 23+p+n*2 bReserved 1 Boolean
815 * ----------------------------------------------------------
816 * 24+p+n*2 iExtension 1 Index
817 * Index of a string descriptor that describes this
818 * extension unit.
819 * ----------------------------------------------------------
820 */
821 p = buflen >= 22 ? buffer[21] : 0;
822 n = buflen >= 25 + p ? buffer[22+p] : 0;
823
824 if (buflen < 25 + p + 2*n) {
825 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
826 "interface %d EXTENSION_UNIT error\n",
827 udev->devnum, alts->desc.bInterfaceNumber);
828 break;
829 }
830
831 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
832 p + 1, 2*n);
833 if (unit == NULL)
834 return -ENOMEM;
835
836 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
837 unit->extension.bNumControls = buffer[20];
838 memcpy(unit->baSourceID, &buffer[22], p);
839 unit->extension.bControlSize = buffer[22+p];
840 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
841 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit)
842 + n;
843 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
844
845 if (buffer[24+p+2*n] == 0 ||
846 usb_string(udev, buffer[24+p+2*n], unit->name, sizeof(unit->name)) < 0)
847 sprintf(unit->name, "Extension %u", buffer[3]);
848
849 list_add_tail(&unit->list, &dev->entities);
850 handled = 1;
851 break;
852 }
853
854 return handled;
855 }
856
uvc_parse_standard_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)857 static int uvc_parse_standard_control(struct uvc_device *dev,
858 const unsigned char *buffer, int buflen)
859 {
860 struct usb_device *udev = dev->udev;
861 struct uvc_entity *unit, *term;
862 struct usb_interface *intf;
863 struct usb_host_interface *alts = dev->intf->cur_altsetting;
864 unsigned int i, n, p, len;
865 u16 type;
866
867 switch (buffer[2]) {
868 case UVC_VC_HEADER:
869 n = buflen >= 12 ? buffer[11] : 0;
870
871 if (buflen < 12 + n) {
872 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
873 "interface %d HEADER error\n", udev->devnum,
874 alts->desc.bInterfaceNumber);
875 return -EINVAL;
876 }
877
878 dev->uvc_version = get_unaligned_le16(&buffer[3]);
879 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
880
881 /* Parse all USB Video Streaming interfaces. */
882 for (i = 0; i < n; ++i) {
883 intf = usb_ifnum_to_if(udev, buffer[12+i]);
884 if (intf == NULL) {
885 uvc_trace(UVC_TRACE_DESCR, "device %d "
886 "interface %d doesn't exists\n",
887 udev->devnum, i);
888 continue;
889 }
890
891 uvc_parse_streaming(dev, intf);
892 }
893 break;
894
895 case UVC_VC_INPUT_TERMINAL:
896 if (buflen < 8) {
897 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
898 "interface %d INPUT_TERMINAL error\n",
899 udev->devnum, alts->desc.bInterfaceNumber);
900 return -EINVAL;
901 }
902
903 /*
904 * Reject invalid terminal types that would cause issues:
905 *
906 * - The high byte must be non-zero, otherwise it would be
907 * confused with a unit.
908 *
909 * - Bit 15 must be 0, as we use it internally as a terminal
910 * direction flag.
911 *
912 * Other unknown types are accepted.
913 */
914 type = get_unaligned_le16(&buffer[4]);
915 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) {
916 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
917 "interface %d INPUT_TERMINAL %d has invalid "
918 "type 0x%04x, skipping\n", udev->devnum,
919 alts->desc.bInterfaceNumber,
920 buffer[3], type);
921 return 0;
922 }
923
924 n = 0;
925 p = 0;
926 len = 8;
927
928 if (type == UVC_ITT_CAMERA) {
929 n = buflen >= 15 ? buffer[14] : 0;
930 len = 15;
931
932 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
933 n = buflen >= 9 ? buffer[8] : 0;
934 p = buflen >= 10 + n ? buffer[9+n] : 0;
935 len = 10;
936 }
937
938 if (buflen < len + n + p) {
939 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
940 "interface %d INPUT_TERMINAL error\n",
941 udev->devnum, alts->desc.bInterfaceNumber);
942 return -EINVAL;
943 }
944
945 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
946 1, n + p);
947 if (term == NULL)
948 return -ENOMEM;
949
950 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
951 term->camera.bControlSize = n;
952 term->camera.bmControls = (u8 *)term + sizeof(*term);
953 term->camera.wObjectiveFocalLengthMin =
954 get_unaligned_le16(&buffer[8]);
955 term->camera.wObjectiveFocalLengthMax =
956 get_unaligned_le16(&buffer[10]);
957 term->camera.wOcularFocalLength =
958 get_unaligned_le16(&buffer[12]);
959 memcpy(term->camera.bmControls, &buffer[15], n);
960 } else if (UVC_ENTITY_TYPE(term) ==
961 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
962 term->media.bControlSize = n;
963 term->media.bmControls = (u8 *)term + sizeof(*term);
964 term->media.bTransportModeSize = p;
965 term->media.bmTransportModes = (u8 *)term
966 + sizeof(*term) + n;
967 memcpy(term->media.bmControls, &buffer[9], n);
968 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
969 }
970
971 if (buffer[7] == 0 ||
972 usb_string(udev, buffer[7], term->name, sizeof(term->name)) < 0) {
973 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
974 sprintf(term->name, "Camera %u", buffer[3]);
975 if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
976 sprintf(term->name, "Media %u", buffer[3]);
977 else
978 sprintf(term->name, "Input %u", buffer[3]);
979 }
980
981 list_add_tail(&term->list, &dev->entities);
982 break;
983
984 case UVC_VC_OUTPUT_TERMINAL:
985 if (buflen < 9) {
986 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
987 "interface %d OUTPUT_TERMINAL error\n",
988 udev->devnum, alts->desc.bInterfaceNumber);
989 return -EINVAL;
990 }
991
992 /* Make sure the terminal type MSB is not null, otherwise it
993 * could be confused with a unit.
994 */
995 type = get_unaligned_le16(&buffer[4]);
996 if ((type & 0xff00) == 0) {
997 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
998 "interface %d OUTPUT_TERMINAL %d has invalid "
999 "type 0x%04x, skipping\n", udev->devnum,
1000 alts->desc.bInterfaceNumber, buffer[3], type);
1001 return 0;
1002 }
1003
1004 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1005 1, 0);
1006 if (term == NULL)
1007 return -ENOMEM;
1008
1009 memcpy(term->baSourceID, &buffer[7], 1);
1010
1011 if (buffer[8] == 0 ||
1012 usb_string(udev, buffer[8], term->name, sizeof(term->name)) < 0)
1013 sprintf(term->name, "Output %u", buffer[3]);
1014
1015 list_add_tail(&term->list, &dev->entities);
1016 break;
1017
1018 case UVC_VC_SELECTOR_UNIT:
1019 p = buflen >= 5 ? buffer[4] : 0;
1020
1021 if (buflen < 5 || buflen < 6 + p) {
1022 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1023 "interface %d SELECTOR_UNIT error\n",
1024 udev->devnum, alts->desc.bInterfaceNumber);
1025 return -EINVAL;
1026 }
1027
1028 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1029 if (unit == NULL)
1030 return -ENOMEM;
1031
1032 memcpy(unit->baSourceID, &buffer[5], p);
1033
1034 if (buffer[5+p] == 0 ||
1035 usb_string(udev, buffer[5+p], unit->name, sizeof(unit->name)) < 0)
1036 sprintf(unit->name, "Selector %u", buffer[3]);
1037
1038 list_add_tail(&unit->list, &dev->entities);
1039 break;
1040
1041 case UVC_VC_PROCESSING_UNIT:
1042 n = buflen >= 8 ? buffer[7] : 0;
1043 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1044
1045 if (buflen < p + n) {
1046 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1047 "interface %d PROCESSING_UNIT error\n",
1048 udev->devnum, alts->desc.bInterfaceNumber);
1049 return -EINVAL;
1050 }
1051
1052 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1053 if (unit == NULL)
1054 return -ENOMEM;
1055
1056 memcpy(unit->baSourceID, &buffer[4], 1);
1057 unit->processing.wMaxMultiplier =
1058 get_unaligned_le16(&buffer[5]);
1059 unit->processing.bControlSize = buffer[7];
1060 unit->processing.bmControls = (u8 *)unit + sizeof(*unit);
1061 memcpy(unit->processing.bmControls, &buffer[8], n);
1062 if (dev->uvc_version >= 0x0110)
1063 unit->processing.bmVideoStandards = buffer[9+n];
1064
1065 if (buffer[8+n] == 0 ||
1066 usb_string(udev, buffer[8+n], unit->name, sizeof(unit->name)) < 0)
1067 sprintf(unit->name, "Processing %u", buffer[3]);
1068
1069 list_add_tail(&unit->list, &dev->entities);
1070 break;
1071
1072 case UVC_VC_EXTENSION_UNIT:
1073 p = buflen >= 22 ? buffer[21] : 0;
1074 n = buflen >= 24 + p ? buffer[22+p] : 0;
1075
1076 if (buflen < 24 + p + n) {
1077 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1078 "interface %d EXTENSION_UNIT error\n",
1079 udev->devnum, alts->desc.bInterfaceNumber);
1080 return -EINVAL;
1081 }
1082
1083 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1084 if (unit == NULL)
1085 return -ENOMEM;
1086
1087 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1088 unit->extension.bNumControls = buffer[20];
1089 memcpy(unit->baSourceID, &buffer[22], p);
1090 unit->extension.bControlSize = buffer[22+p];
1091 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1092 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1093
1094 if (buffer[23+p+n] == 0 ||
1095 usb_string(udev, buffer[23+p+n], unit->name, sizeof(unit->name)) < 0)
1096 sprintf(unit->name, "Extension %u", buffer[3]);
1097
1098 list_add_tail(&unit->list, &dev->entities);
1099 break;
1100
1101 default:
1102 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1103 "descriptor (%u)\n", buffer[2]);
1104 break;
1105 }
1106
1107 return 0;
1108 }
1109
uvc_parse_control(struct uvc_device * dev)1110 static int uvc_parse_control(struct uvc_device *dev)
1111 {
1112 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1113 unsigned char *buffer = alts->extra;
1114 int buflen = alts->extralen;
1115 int ret;
1116
1117 /* Parse the default alternate setting only, as the UVC specification
1118 * defines a single alternate setting, the default alternate setting
1119 * zero.
1120 */
1121
1122 while (buflen > 2) {
1123 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1124 buffer[1] != USB_DT_CS_INTERFACE)
1125 goto next_descriptor;
1126
1127 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1128 return ret;
1129
1130 next_descriptor:
1131 buflen -= buffer[0];
1132 buffer += buffer[0];
1133 }
1134
1135 /* Check if the optional status endpoint is present. Built-in iSight
1136 * webcams have an interrupt endpoint but spit proprietary data that
1137 * don't conform to the UVC status endpoint messages. Don't try to
1138 * handle the interrupt endpoint for those cameras.
1139 */
1140 if (alts->desc.bNumEndpoints == 1 &&
1141 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1142 struct usb_host_endpoint *ep = &alts->endpoint[0];
1143 struct usb_endpoint_descriptor *desc = &ep->desc;
1144
1145 if (usb_endpoint_is_int_in(desc) &&
1146 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1147 desc->bInterval != 0) {
1148 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1149 "(addr %02x).\n", desc->bEndpointAddress);
1150 dev->int_ep = ep;
1151 }
1152 }
1153
1154 return 0;
1155 }
1156
1157 /* ------------------------------------------------------------------------
1158 * UVC device scan
1159 */
1160
1161 /*
1162 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1163 * and containing the following units:
1164 *
1165 * - one or more Output Terminals (USB Streaming or Display)
1166 * - zero or one Processing Unit
1167 * - zero, one or more single-input Selector Units
1168 * - zero or one multiple-input Selector Units, provided all inputs are
1169 * connected to input terminals
1170 * - zero, one or mode single-input Extension Units
1171 * - one or more Input Terminals (Camera, External or USB Streaming)
1172 *
1173 * The terminal and units must match on of the following structures:
1174 *
1175 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1176 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1177 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1178 *
1179 * +---------+ +---------+ -> OTT_*(0)
1180 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1181 * +---------+ +---------+ -> OTT_*(n)
1182 *
1183 * The Processing Unit and Extension Units can be in any order. Additional
1184 * Extension Units connected to the main chain as single-unit branches are
1185 * also supported. Single-input Selector Units are ignored.
1186 */
uvc_scan_chain_entity(struct uvc_video_chain * chain,struct uvc_entity * entity)1187 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1188 struct uvc_entity *entity)
1189 {
1190 switch (UVC_ENTITY_TYPE(entity)) {
1191 case UVC_VC_EXTENSION_UNIT:
1192 if (uvc_trace_param & UVC_TRACE_PROBE)
1193 printk(KERN_CONT " <- XU %d", entity->id);
1194
1195 if (entity->bNrInPins != 1) {
1196 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1197 "than 1 input pin.\n", entity->id);
1198 return -1;
1199 }
1200
1201 break;
1202
1203 case UVC_VC_PROCESSING_UNIT:
1204 if (uvc_trace_param & UVC_TRACE_PROBE)
1205 printk(KERN_CONT " <- PU %d", entity->id);
1206
1207 if (chain->processing != NULL) {
1208 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1209 "Processing Units in chain.\n");
1210 return -1;
1211 }
1212
1213 chain->processing = entity;
1214 break;
1215
1216 case UVC_VC_SELECTOR_UNIT:
1217 if (uvc_trace_param & UVC_TRACE_PROBE)
1218 printk(KERN_CONT " <- SU %d", entity->id);
1219
1220 /* Single-input selector units are ignored. */
1221 if (entity->bNrInPins == 1)
1222 break;
1223
1224 if (chain->selector != NULL) {
1225 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1226 "Units in chain.\n");
1227 return -1;
1228 }
1229
1230 chain->selector = entity;
1231 break;
1232
1233 case UVC_ITT_VENDOR_SPECIFIC:
1234 case UVC_ITT_CAMERA:
1235 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1236 if (uvc_trace_param & UVC_TRACE_PROBE)
1237 printk(KERN_CONT " <- IT %d\n", entity->id);
1238
1239 break;
1240
1241 case UVC_OTT_VENDOR_SPECIFIC:
1242 case UVC_OTT_DISPLAY:
1243 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1244 if (uvc_trace_param & UVC_TRACE_PROBE)
1245 printk(KERN_CONT " OT %d", entity->id);
1246
1247 break;
1248
1249 case UVC_TT_STREAMING:
1250 if (UVC_ENTITY_IS_ITERM(entity)) {
1251 if (uvc_trace_param & UVC_TRACE_PROBE)
1252 printk(KERN_CONT " <- IT %d\n", entity->id);
1253 } else {
1254 if (uvc_trace_param & UVC_TRACE_PROBE)
1255 printk(KERN_CONT " OT %d", entity->id);
1256 }
1257
1258 break;
1259
1260 default:
1261 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1262 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1263 return -1;
1264 }
1265
1266 list_add_tail(&entity->chain, &chain->entities);
1267 return 0;
1268 }
1269
uvc_scan_chain_forward(struct uvc_video_chain * chain,struct uvc_entity * entity,struct uvc_entity * prev)1270 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1271 struct uvc_entity *entity, struct uvc_entity *prev)
1272 {
1273 struct uvc_entity *forward;
1274 int found;
1275
1276 /* Forward scan */
1277 forward = NULL;
1278 found = 0;
1279
1280 while (1) {
1281 forward = uvc_entity_by_reference(chain->dev, entity->id,
1282 forward);
1283 if (forward == NULL)
1284 break;
1285 if (forward == prev)
1286 continue;
1287 if (forward->chain.next || forward->chain.prev) {
1288 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1289 "entity %d already in chain.\n", forward->id);
1290 return -EINVAL;
1291 }
1292
1293 switch (UVC_ENTITY_TYPE(forward)) {
1294 case UVC_VC_EXTENSION_UNIT:
1295 if (forward->bNrInPins != 1) {
1296 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1297 "has more than 1 input pin.\n",
1298 entity->id);
1299 return -EINVAL;
1300 }
1301
1302 /*
1303 * Some devices reference an output terminal as the
1304 * source of extension units. This is incorrect, as
1305 * output terminals only have an input pin, and thus
1306 * can't be connected to any entity in the forward
1307 * direction. The resulting topology would cause issues
1308 * when registering the media controller graph. To
1309 * avoid this problem, connect the extension unit to
1310 * the source of the output terminal instead.
1311 */
1312 if (UVC_ENTITY_IS_OTERM(entity)) {
1313 struct uvc_entity *source;
1314
1315 source = uvc_entity_by_id(chain->dev,
1316 entity->baSourceID[0]);
1317 if (!source) {
1318 uvc_trace(UVC_TRACE_DESCR,
1319 "Can't connect extension unit %u in chain\n",
1320 forward->id);
1321 break;
1322 }
1323
1324 forward->baSourceID[0] = source->id;
1325 }
1326
1327 list_add_tail(&forward->chain, &chain->entities);
1328 if (uvc_trace_param & UVC_TRACE_PROBE) {
1329 if (!found)
1330 printk(KERN_CONT " (->");
1331
1332 printk(KERN_CONT " XU %d", forward->id);
1333 found = 1;
1334 }
1335 break;
1336
1337 case UVC_OTT_VENDOR_SPECIFIC:
1338 case UVC_OTT_DISPLAY:
1339 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1340 case UVC_TT_STREAMING:
1341 if (UVC_ENTITY_IS_ITERM(forward)) {
1342 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1343 "terminal %u.\n", forward->id);
1344 return -EINVAL;
1345 }
1346
1347 if (UVC_ENTITY_IS_OTERM(entity)) {
1348 uvc_trace(UVC_TRACE_DESCR,
1349 "Unsupported connection between output terminals %u and %u\n",
1350 entity->id, forward->id);
1351 break;
1352 }
1353
1354 list_add_tail(&forward->chain, &chain->entities);
1355 if (uvc_trace_param & UVC_TRACE_PROBE) {
1356 if (!found)
1357 printk(KERN_CONT " (->");
1358
1359 printk(KERN_CONT " OT %d", forward->id);
1360 found = 1;
1361 }
1362 break;
1363 }
1364 }
1365 if (found)
1366 printk(KERN_CONT ")");
1367
1368 return 0;
1369 }
1370
uvc_scan_chain_backward(struct uvc_video_chain * chain,struct uvc_entity ** _entity)1371 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1372 struct uvc_entity **_entity)
1373 {
1374 struct uvc_entity *entity = *_entity;
1375 struct uvc_entity *term;
1376 int id = -EINVAL, i;
1377
1378 switch (UVC_ENTITY_TYPE(entity)) {
1379 case UVC_VC_EXTENSION_UNIT:
1380 case UVC_VC_PROCESSING_UNIT:
1381 id = entity->baSourceID[0];
1382 break;
1383
1384 case UVC_VC_SELECTOR_UNIT:
1385 /* Single-input selector units are ignored. */
1386 if (entity->bNrInPins == 1) {
1387 id = entity->baSourceID[0];
1388 break;
1389 }
1390
1391 if (uvc_trace_param & UVC_TRACE_PROBE)
1392 printk(KERN_CONT " <- IT");
1393
1394 chain->selector = entity;
1395 for (i = 0; i < entity->bNrInPins; ++i) {
1396 id = entity->baSourceID[i];
1397 term = uvc_entity_by_id(chain->dev, id);
1398 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1399 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1400 "input %d isn't connected to an "
1401 "input terminal\n", entity->id, i);
1402 return -1;
1403 }
1404
1405 if (term->chain.next || term->chain.prev) {
1406 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1407 "entity %d already in chain.\n",
1408 term->id);
1409 return -EINVAL;
1410 }
1411
1412 if (uvc_trace_param & UVC_TRACE_PROBE)
1413 printk(KERN_CONT " %d", term->id);
1414
1415 list_add_tail(&term->chain, &chain->entities);
1416 uvc_scan_chain_forward(chain, term, entity);
1417 }
1418
1419 if (uvc_trace_param & UVC_TRACE_PROBE)
1420 printk(KERN_CONT "\n");
1421
1422 id = 0;
1423 break;
1424
1425 case UVC_ITT_VENDOR_SPECIFIC:
1426 case UVC_ITT_CAMERA:
1427 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1428 case UVC_OTT_VENDOR_SPECIFIC:
1429 case UVC_OTT_DISPLAY:
1430 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1431 case UVC_TT_STREAMING:
1432 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1433 break;
1434 }
1435
1436 if (id <= 0) {
1437 *_entity = NULL;
1438 return id;
1439 }
1440
1441 entity = uvc_entity_by_id(chain->dev, id);
1442 if (entity == NULL) {
1443 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1444 "unknown entity %d.\n", id);
1445 return -EINVAL;
1446 }
1447
1448 *_entity = entity;
1449 return 0;
1450 }
1451
uvc_scan_chain(struct uvc_video_chain * chain,struct uvc_entity * term)1452 static int uvc_scan_chain(struct uvc_video_chain *chain,
1453 struct uvc_entity *term)
1454 {
1455 struct uvc_entity *entity, *prev;
1456
1457 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1458
1459 entity = term;
1460 prev = NULL;
1461
1462 while (entity != NULL) {
1463 /* Entity must not be part of an existing chain */
1464 if (entity->chain.next || entity->chain.prev) {
1465 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1466 "entity %d already in chain.\n", entity->id);
1467 return -EINVAL;
1468 }
1469
1470 /* Process entity */
1471 if (uvc_scan_chain_entity(chain, entity) < 0)
1472 return -EINVAL;
1473
1474 /* Forward scan */
1475 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1476 return -EINVAL;
1477
1478 /* Backward scan */
1479 prev = entity;
1480 if (uvc_scan_chain_backward(chain, &entity) < 0)
1481 return -EINVAL;
1482 }
1483
1484 return 0;
1485 }
1486
uvc_print_terms(struct list_head * terms,u16 dir,char * buffer)1487 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1488 char *buffer)
1489 {
1490 struct uvc_entity *term;
1491 unsigned int nterms = 0;
1492 char *p = buffer;
1493
1494 list_for_each_entry(term, terms, chain) {
1495 if (!UVC_ENTITY_IS_TERM(term) ||
1496 UVC_TERM_DIRECTION(term) != dir)
1497 continue;
1498
1499 if (nterms)
1500 p += sprintf(p, ",");
1501 if (++nterms >= 4) {
1502 p += sprintf(p, "...");
1503 break;
1504 }
1505 p += sprintf(p, "%u", term->id);
1506 }
1507
1508 return p - buffer;
1509 }
1510
uvc_print_chain(struct uvc_video_chain * chain)1511 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1512 {
1513 static char buffer[43];
1514 char *p = buffer;
1515
1516 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1517 p += sprintf(p, " -> ");
1518 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1519
1520 return buffer;
1521 }
1522
uvc_alloc_chain(struct uvc_device * dev)1523 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1524 {
1525 struct uvc_video_chain *chain;
1526
1527 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1528 if (chain == NULL)
1529 return NULL;
1530
1531 INIT_LIST_HEAD(&chain->entities);
1532 mutex_init(&chain->ctrl_mutex);
1533 chain->dev = dev;
1534 v4l2_prio_init(&chain->prio);
1535
1536 return chain;
1537 }
1538
1539 /*
1540 * Fallback heuristic for devices that don't connect units and terminals in a
1541 * valid chain.
1542 *
1543 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1544 * to fail, but if we just take the entities we can find and put them together
1545 * in the most sensible chain we can think of, turns out they do work anyway.
1546 * Note: This heuristic assumes there is a single chain.
1547 *
1548 * At the time of writing, devices known to have such a broken chain are
1549 * - Acer Integrated Camera (5986:055a)
1550 * - Realtek rtl157a7 (0bda:57a7)
1551 */
uvc_scan_fallback(struct uvc_device * dev)1552 static int uvc_scan_fallback(struct uvc_device *dev)
1553 {
1554 struct uvc_video_chain *chain;
1555 struct uvc_entity *iterm = NULL;
1556 struct uvc_entity *oterm = NULL;
1557 struct uvc_entity *entity;
1558 struct uvc_entity *prev;
1559
1560 /*
1561 * Start by locating the input and output terminals. We only support
1562 * devices with exactly one of each for now.
1563 */
1564 list_for_each_entry(entity, &dev->entities, list) {
1565 if (UVC_ENTITY_IS_ITERM(entity)) {
1566 if (iterm)
1567 return -EINVAL;
1568 iterm = entity;
1569 }
1570
1571 if (UVC_ENTITY_IS_OTERM(entity)) {
1572 if (oterm)
1573 return -EINVAL;
1574 oterm = entity;
1575 }
1576 }
1577
1578 if (iterm == NULL || oterm == NULL)
1579 return -EINVAL;
1580
1581 /* Allocate the chain and fill it. */
1582 chain = uvc_alloc_chain(dev);
1583 if (chain == NULL)
1584 return -ENOMEM;
1585
1586 if (uvc_scan_chain_entity(chain, oterm) < 0)
1587 goto error;
1588
1589 prev = oterm;
1590
1591 /*
1592 * Add all Processing and Extension Units with two pads. The order
1593 * doesn't matter much, use reverse list traversal to connect units in
1594 * UVC descriptor order as we build the chain from output to input. This
1595 * leads to units appearing in the order meant by the manufacturer for
1596 * the cameras known to require this heuristic.
1597 */
1598 list_for_each_entry_reverse(entity, &dev->entities, list) {
1599 if (entity->type != UVC_VC_PROCESSING_UNIT &&
1600 entity->type != UVC_VC_EXTENSION_UNIT)
1601 continue;
1602
1603 if (entity->num_pads != 2)
1604 continue;
1605
1606 if (uvc_scan_chain_entity(chain, entity) < 0)
1607 goto error;
1608
1609 prev->baSourceID[0] = entity->id;
1610 prev = entity;
1611 }
1612
1613 if (uvc_scan_chain_entity(chain, iterm) < 0)
1614 goto error;
1615
1616 prev->baSourceID[0] = iterm->id;
1617
1618 list_add_tail(&chain->list, &dev->chains);
1619
1620 uvc_trace(UVC_TRACE_PROBE,
1621 "Found a video chain by fallback heuristic (%s).\n",
1622 uvc_print_chain(chain));
1623
1624 return 0;
1625
1626 error:
1627 kfree(chain);
1628 return -EINVAL;
1629 }
1630
1631 /*
1632 * Scan the device for video chains and register video devices.
1633 *
1634 * Chains are scanned starting at their output terminals and walked backwards.
1635 */
uvc_scan_device(struct uvc_device * dev)1636 static int uvc_scan_device(struct uvc_device *dev)
1637 {
1638 struct uvc_video_chain *chain;
1639 struct uvc_entity *term;
1640
1641 list_for_each_entry(term, &dev->entities, list) {
1642 if (!UVC_ENTITY_IS_OTERM(term))
1643 continue;
1644
1645 /* If the terminal is already included in a chain, skip it.
1646 * This can happen for chains that have multiple output
1647 * terminals, where all output terminals beside the first one
1648 * will be inserted in the chain in forward scans.
1649 */
1650 if (term->chain.next || term->chain.prev)
1651 continue;
1652
1653 chain = uvc_alloc_chain(dev);
1654 if (chain == NULL)
1655 return -ENOMEM;
1656
1657 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1658
1659 if (uvc_scan_chain(chain, term) < 0) {
1660 kfree(chain);
1661 continue;
1662 }
1663
1664 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1665 uvc_print_chain(chain));
1666
1667 list_add_tail(&chain->list, &dev->chains);
1668 }
1669
1670 if (list_empty(&dev->chains))
1671 uvc_scan_fallback(dev);
1672
1673 if (list_empty(&dev->chains)) {
1674 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1675 return -1;
1676 }
1677
1678 return 0;
1679 }
1680
1681 /* ------------------------------------------------------------------------
1682 * Video device registration and unregistration
1683 */
1684
1685 /*
1686 * Delete the UVC device.
1687 *
1688 * Called by the kernel when the last reference to the uvc_device structure
1689 * is released.
1690 *
1691 * As this function is called after or during disconnect(), all URBs have
1692 * already been cancelled by the USB core. There is no need to kill the
1693 * interrupt URB manually.
1694 */
uvc_delete(struct kref * kref)1695 static void uvc_delete(struct kref *kref)
1696 {
1697 struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
1698 struct list_head *p, *n;
1699
1700 uvc_status_cleanup(dev);
1701 uvc_ctrl_cleanup_device(dev);
1702
1703 usb_put_intf(dev->intf);
1704 usb_put_dev(dev->udev);
1705
1706 #ifdef CONFIG_MEDIA_CONTROLLER
1707 media_device_cleanup(&dev->mdev);
1708 #endif
1709
1710 list_for_each_safe(p, n, &dev->chains) {
1711 struct uvc_video_chain *chain;
1712 chain = list_entry(p, struct uvc_video_chain, list);
1713 kfree(chain);
1714 }
1715
1716 list_for_each_safe(p, n, &dev->entities) {
1717 struct uvc_entity *entity;
1718 entity = list_entry(p, struct uvc_entity, list);
1719 #ifdef CONFIG_MEDIA_CONTROLLER
1720 uvc_mc_cleanup_entity(entity);
1721 #endif
1722 kfree(entity);
1723 }
1724
1725 list_for_each_safe(p, n, &dev->streams) {
1726 struct uvc_streaming *streaming;
1727 streaming = list_entry(p, struct uvc_streaming, list);
1728 usb_driver_release_interface(&uvc_driver.driver,
1729 streaming->intf);
1730 uvc_stream_delete(streaming);
1731 }
1732
1733 kfree(dev);
1734 }
1735
uvc_release(struct video_device * vdev)1736 static void uvc_release(struct video_device *vdev)
1737 {
1738 struct uvc_streaming *stream = video_get_drvdata(vdev);
1739 struct uvc_device *dev = stream->dev;
1740
1741 kref_put(&dev->ref, uvc_delete);
1742 }
1743
1744 /*
1745 * Unregister the video devices.
1746 */
uvc_unregister_video(struct uvc_device * dev)1747 static void uvc_unregister_video(struct uvc_device *dev)
1748 {
1749 struct uvc_streaming *stream;
1750
1751 list_for_each_entry(stream, &dev->streams, list) {
1752 if (!video_is_registered(&stream->vdev))
1753 continue;
1754
1755 video_unregister_device(&stream->vdev);
1756 video_unregister_device(&stream->meta.vdev);
1757
1758 uvc_debugfs_cleanup_stream(stream);
1759 }
1760
1761 uvc_status_unregister(dev);
1762
1763 if (dev->vdev.dev)
1764 v4l2_device_unregister(&dev->vdev);
1765 #ifdef CONFIG_MEDIA_CONTROLLER
1766 if (media_devnode_is_registered(dev->mdev.devnode))
1767 media_device_unregister(&dev->mdev);
1768 #endif
1769 }
1770
uvc_register_video_device(struct uvc_device * dev,struct uvc_streaming * stream,struct video_device * vdev,struct uvc_video_queue * queue,enum v4l2_buf_type type,const struct v4l2_file_operations * fops,const struct v4l2_ioctl_ops * ioctl_ops)1771 int uvc_register_video_device(struct uvc_device *dev,
1772 struct uvc_streaming *stream,
1773 struct video_device *vdev,
1774 struct uvc_video_queue *queue,
1775 enum v4l2_buf_type type,
1776 const struct v4l2_file_operations *fops,
1777 const struct v4l2_ioctl_ops *ioctl_ops)
1778 {
1779 int ret;
1780
1781 /* Initialize the video buffers queue. */
1782 ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
1783 if (ret)
1784 return ret;
1785
1786 /* Register the device with V4L. */
1787
1788 /*
1789 * We already hold a reference to dev->udev. The video device will be
1790 * unregistered before the reference is released, so we don't need to
1791 * get another one.
1792 */
1793 vdev->v4l2_dev = &dev->vdev;
1794 vdev->fops = fops;
1795 vdev->ioctl_ops = ioctl_ops;
1796 vdev->release = uvc_release;
1797 vdev->prio = &stream->chain->prio;
1798 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1799 vdev->vfl_dir = VFL_DIR_TX;
1800 else
1801 vdev->vfl_dir = VFL_DIR_RX;
1802
1803 switch (type) {
1804 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1805 default:
1806 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1807 break;
1808 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1809 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
1810 break;
1811 case V4L2_BUF_TYPE_META_CAPTURE:
1812 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
1813 break;
1814 }
1815
1816 strscpy(vdev->name, dev->name, sizeof(vdev->name));
1817
1818 /*
1819 * Set the driver data before calling video_register_device, otherwise
1820 * the file open() handler might race us.
1821 */
1822 video_set_drvdata(vdev, stream);
1823
1824 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
1825 if (ret < 0) {
1826 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
1827 v4l2_type_names[type], ret);
1828 return ret;
1829 }
1830
1831 kref_get(&dev->ref);
1832 return 0;
1833 }
1834
uvc_register_video(struct uvc_device * dev,struct uvc_streaming * stream)1835 static int uvc_register_video(struct uvc_device *dev,
1836 struct uvc_streaming *stream)
1837 {
1838 int ret;
1839
1840 /* Initialize the streaming interface with default parameters. */
1841 ret = uvc_video_init(stream);
1842 if (ret < 0) {
1843 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
1844 ret);
1845 return ret;
1846 }
1847
1848 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1849 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
1850 | V4L2_CAP_META_CAPTURE;
1851 else
1852 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1853
1854 uvc_debugfs_init_stream(stream);
1855
1856 /* Register the device with V4L. */
1857 return uvc_register_video_device(dev, stream, &stream->vdev,
1858 &stream->queue, stream->type,
1859 &uvc_fops, &uvc_ioctl_ops);
1860 }
1861
1862 /*
1863 * Register all video devices in all chains.
1864 */
uvc_register_terms(struct uvc_device * dev,struct uvc_video_chain * chain)1865 static int uvc_register_terms(struct uvc_device *dev,
1866 struct uvc_video_chain *chain)
1867 {
1868 struct uvc_streaming *stream;
1869 struct uvc_entity *term;
1870 int ret;
1871
1872 list_for_each_entry(term, &chain->entities, chain) {
1873 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1874 continue;
1875
1876 stream = uvc_stream_by_id(dev, term->id);
1877 if (stream == NULL) {
1878 uvc_printk(KERN_INFO, "No streaming interface found "
1879 "for terminal %u.", term->id);
1880 continue;
1881 }
1882
1883 stream->chain = chain;
1884 ret = uvc_register_video(dev, stream);
1885 if (ret < 0)
1886 return ret;
1887
1888 /* Register a metadata node, but ignore a possible failure,
1889 * complete registration of video nodes anyway.
1890 */
1891 uvc_meta_register(stream);
1892
1893 term->vdev = &stream->vdev;
1894 }
1895
1896 return 0;
1897 }
1898
uvc_register_chains(struct uvc_device * dev)1899 static int uvc_register_chains(struct uvc_device *dev)
1900 {
1901 struct uvc_video_chain *chain;
1902 int ret;
1903
1904 list_for_each_entry(chain, &dev->chains, list) {
1905 ret = uvc_register_terms(dev, chain);
1906 if (ret < 0)
1907 return ret;
1908
1909 #ifdef CONFIG_MEDIA_CONTROLLER
1910 ret = uvc_mc_register_entities(chain);
1911 if (ret < 0)
1912 uvc_printk(KERN_INFO,
1913 "Failed to register entities (%d).\n", ret);
1914 #endif
1915 }
1916
1917 return 0;
1918 }
1919
1920 /* ------------------------------------------------------------------------
1921 * USB probe, disconnect, suspend and resume
1922 */
1923
1924 static const struct uvc_device_info uvc_quirk_none = { 0 };
1925
uvc_probe(struct usb_interface * intf,const struct usb_device_id * id)1926 static int uvc_probe(struct usb_interface *intf,
1927 const struct usb_device_id *id)
1928 {
1929 struct usb_device *udev = interface_to_usbdev(intf);
1930 struct uvc_device *dev;
1931 const struct uvc_device_info *info =
1932 (const struct uvc_device_info *)id->driver_info;
1933 int function;
1934 int ret;
1935
1936 if (id->idVendor && id->idProduct)
1937 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1938 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1939 id->idProduct);
1940 else
1941 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1942 udev->devpath);
1943
1944 /* Allocate memory for the device and initialize it. */
1945 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1946 if (dev == NULL)
1947 return -ENOMEM;
1948
1949 INIT_LIST_HEAD(&dev->entities);
1950 INIT_LIST_HEAD(&dev->chains);
1951 INIT_LIST_HEAD(&dev->streams);
1952 kref_init(&dev->ref);
1953 atomic_set(&dev->nmappings, 0);
1954 mutex_init(&dev->lock);
1955
1956 dev->udev = usb_get_dev(udev);
1957 dev->intf = usb_get_intf(intf);
1958 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1959 dev->info = info ? info : &uvc_quirk_none;
1960 dev->quirks = uvc_quirks_param == -1
1961 ? dev->info->quirks : uvc_quirks_param;
1962
1963 if (udev->product != NULL)
1964 strscpy(dev->name, udev->product, sizeof(dev->name));
1965 else
1966 snprintf(dev->name, sizeof(dev->name),
1967 "UVC Camera (%04x:%04x)",
1968 le16_to_cpu(udev->descriptor.idVendor),
1969 le16_to_cpu(udev->descriptor.idProduct));
1970
1971 /*
1972 * Add iFunction or iInterface to names when available as additional
1973 * distinguishers between interfaces. iFunction is prioritized over
1974 * iInterface which matches Windows behavior at the point of writing.
1975 */
1976 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
1977 function = intf->intf_assoc->iFunction;
1978 else
1979 function = intf->cur_altsetting->desc.iInterface;
1980 if (function != 0) {
1981 size_t len;
1982
1983 strlcat(dev->name, ": ", sizeof(dev->name));
1984 len = strlen(dev->name);
1985 usb_string(udev, function, dev->name + len,
1986 sizeof(dev->name) - len);
1987 }
1988
1989 /* Initialize the media device. */
1990 #ifdef CONFIG_MEDIA_CONTROLLER
1991 dev->mdev.dev = &intf->dev;
1992 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
1993 if (udev->serial)
1994 strscpy(dev->mdev.serial, udev->serial,
1995 sizeof(dev->mdev.serial));
1996 usb_make_path(udev, dev->mdev.bus_info, sizeof(dev->mdev.bus_info));
1997 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
1998 media_device_init(&dev->mdev);
1999
2000 dev->vdev.mdev = &dev->mdev;
2001 #endif
2002
2003 /* Parse the Video Class control descriptor. */
2004 if (uvc_parse_control(dev) < 0) {
2005 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
2006 "descriptors.\n");
2007 goto error;
2008 }
2009
2010 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2011 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2012 udev->product ? udev->product : "<unnamed>",
2013 le16_to_cpu(udev->descriptor.idVendor),
2014 le16_to_cpu(udev->descriptor.idProduct));
2015
2016 if (dev->quirks != dev->info->quirks) {
2017 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
2018 "parameter for testing purpose.\n", dev->quirks);
2019 uvc_printk(KERN_INFO, "Please report required quirks to the "
2020 "linux-uvc-devel mailing list.\n");
2021 }
2022
2023 /* Register the V4L2 device. */
2024 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2025 goto error;
2026
2027 /* Initialize controls. */
2028 if (uvc_ctrl_init_device(dev) < 0)
2029 goto error;
2030
2031 /* Scan the device for video chains. */
2032 if (uvc_scan_device(dev) < 0)
2033 goto error;
2034
2035 /* Register video device nodes. */
2036 if (uvc_register_chains(dev) < 0)
2037 goto error;
2038
2039 #ifdef CONFIG_MEDIA_CONTROLLER
2040 /* Register the media device node */
2041 if (media_device_register(&dev->mdev) < 0)
2042 goto error;
2043 #endif
2044 /* Save our data pointer in the interface data. */
2045 usb_set_intfdata(intf, dev);
2046
2047 /* Initialize the interrupt URB. */
2048 if ((ret = uvc_status_init(dev)) < 0) {
2049 uvc_printk(KERN_INFO, "Unable to initialize the status "
2050 "endpoint (%d), status interrupt will not be "
2051 "supported.\n", ret);
2052 }
2053
2054 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
2055 usb_enable_autosuspend(udev);
2056 return 0;
2057
2058 error:
2059 uvc_unregister_video(dev);
2060 kref_put(&dev->ref, uvc_delete);
2061 return -ENODEV;
2062 }
2063
uvc_disconnect(struct usb_interface * intf)2064 static void uvc_disconnect(struct usb_interface *intf)
2065 {
2066 struct uvc_device *dev = usb_get_intfdata(intf);
2067
2068 /* Set the USB interface data to NULL. This can be done outside the
2069 * lock, as there's no other reader.
2070 */
2071 usb_set_intfdata(intf, NULL);
2072
2073 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2074 UVC_SC_VIDEOSTREAMING)
2075 return;
2076
2077 uvc_unregister_video(dev);
2078 kref_put(&dev->ref, uvc_delete);
2079 }
2080
uvc_suspend(struct usb_interface * intf,pm_message_t message)2081 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2082 {
2083 struct uvc_device *dev = usb_get_intfdata(intf);
2084 struct uvc_streaming *stream;
2085
2086 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
2087 intf->cur_altsetting->desc.bInterfaceNumber);
2088
2089 /* Controls are cached on the fly so they don't need to be saved. */
2090 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2091 UVC_SC_VIDEOCONTROL) {
2092 mutex_lock(&dev->lock);
2093 if (dev->users)
2094 uvc_status_stop(dev);
2095 mutex_unlock(&dev->lock);
2096 return 0;
2097 }
2098
2099 list_for_each_entry(stream, &dev->streams, list) {
2100 if (stream->intf == intf)
2101 return uvc_video_suspend(stream);
2102 }
2103
2104 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2105 "mismatch.\n");
2106 return -EINVAL;
2107 }
2108
__uvc_resume(struct usb_interface * intf,int reset)2109 static int __uvc_resume(struct usb_interface *intf, int reset)
2110 {
2111 struct uvc_device *dev = usb_get_intfdata(intf);
2112 struct uvc_streaming *stream;
2113 int ret = 0;
2114
2115 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2116 intf->cur_altsetting->desc.bInterfaceNumber);
2117
2118 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2119 UVC_SC_VIDEOCONTROL) {
2120 if (reset) {
2121 ret = uvc_ctrl_restore_values(dev);
2122 if (ret < 0)
2123 return ret;
2124 }
2125
2126 mutex_lock(&dev->lock);
2127 if (dev->users)
2128 ret = uvc_status_start(dev, GFP_NOIO);
2129 mutex_unlock(&dev->lock);
2130
2131 return ret;
2132 }
2133
2134 list_for_each_entry(stream, &dev->streams, list) {
2135 if (stream->intf == intf) {
2136 ret = uvc_video_resume(stream, reset);
2137 if (ret < 0)
2138 uvc_queue_streamoff(&stream->queue,
2139 stream->queue.queue.type);
2140 return ret;
2141 }
2142 }
2143
2144 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2145 "mismatch.\n");
2146 return -EINVAL;
2147 }
2148
uvc_resume(struct usb_interface * intf)2149 static int uvc_resume(struct usb_interface *intf)
2150 {
2151 return __uvc_resume(intf, 0);
2152 }
2153
uvc_reset_resume(struct usb_interface * intf)2154 static int uvc_reset_resume(struct usb_interface *intf)
2155 {
2156 return __uvc_resume(intf, 1);
2157 }
2158
2159 /* ------------------------------------------------------------------------
2160 * Module parameters
2161 */
2162
uvc_clock_param_get(char * buffer,const struct kernel_param * kp)2163 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
2164 {
2165 if (uvc_clock_param == CLOCK_MONOTONIC)
2166 return sprintf(buffer, "CLOCK_MONOTONIC");
2167 else
2168 return sprintf(buffer, "CLOCK_REALTIME");
2169 }
2170
uvc_clock_param_set(const char * val,const struct kernel_param * kp)2171 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
2172 {
2173 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2174 val += strlen("clock_");
2175
2176 if (strcasecmp(val, "monotonic") == 0)
2177 uvc_clock_param = CLOCK_MONOTONIC;
2178 else if (strcasecmp(val, "realtime") == 0)
2179 uvc_clock_param = CLOCK_REALTIME;
2180 else
2181 return -EINVAL;
2182
2183 return 0;
2184 }
2185
2186 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2187 &uvc_clock_param, S_IRUGO|S_IWUSR);
2188 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2189 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2190 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2191 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2192 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2193 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2194 MODULE_PARM_DESC(quirks, "Forced device quirks");
2195 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2196 MODULE_PARM_DESC(trace, "Trace level bitmask");
2197 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2198 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2199
2200 /* ------------------------------------------------------------------------
2201 * Driver initialization and cleanup
2202 */
2203
2204 static const struct uvc_device_info uvc_quirk_probe_minmax = {
2205 .quirks = UVC_QUIRK_PROBE_MINMAX,
2206 };
2207
2208 static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
2209 .quirks = UVC_QUIRK_FIX_BANDWIDTH,
2210 };
2211
2212 static const struct uvc_device_info uvc_quirk_probe_def = {
2213 .quirks = UVC_QUIRK_PROBE_DEF,
2214 };
2215
2216 static const struct uvc_device_info uvc_quirk_stream_no_fid = {
2217 .quirks = UVC_QUIRK_STREAM_NO_FID,
2218 };
2219
2220 static const struct uvc_device_info uvc_quirk_force_y8 = {
2221 .quirks = UVC_QUIRK_FORCE_Y8,
2222 };
2223
2224 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
2225 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \
2226 {.meta_format = m}
2227
2228 /*
2229 * The Logitech cameras listed below have their interface class set to
2230 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2231 * though they are compliant.
2232 */
2233 static const struct usb_device_id uvc_ids[] = {
2234 /* LogiLink Wireless Webcam */
2235 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2236 | USB_DEVICE_ID_MATCH_INT_INFO,
2237 .idVendor = 0x0416,
2238 .idProduct = 0xa91a,
2239 .bInterfaceClass = USB_CLASS_VIDEO,
2240 .bInterfaceSubClass = 1,
2241 .bInterfaceProtocol = 0,
2242 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2243 /* Genius eFace 2025 */
2244 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2245 | USB_DEVICE_ID_MATCH_INT_INFO,
2246 .idVendor = 0x0458,
2247 .idProduct = 0x706e,
2248 .bInterfaceClass = USB_CLASS_VIDEO,
2249 .bInterfaceSubClass = 1,
2250 .bInterfaceProtocol = 0,
2251 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2252 /* Microsoft Lifecam NX-6000 */
2253 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2254 | USB_DEVICE_ID_MATCH_INT_INFO,
2255 .idVendor = 0x045e,
2256 .idProduct = 0x00f8,
2257 .bInterfaceClass = USB_CLASS_VIDEO,
2258 .bInterfaceSubClass = 1,
2259 .bInterfaceProtocol = 0,
2260 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2261 /* Microsoft Lifecam NX-3000 */
2262 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2263 | USB_DEVICE_ID_MATCH_INT_INFO,
2264 .idVendor = 0x045e,
2265 .idProduct = 0x0721,
2266 .bInterfaceClass = USB_CLASS_VIDEO,
2267 .bInterfaceSubClass = 1,
2268 .bInterfaceProtocol = 0,
2269 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2270 /* Microsoft Lifecam VX-7000 */
2271 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2272 | USB_DEVICE_ID_MATCH_INT_INFO,
2273 .idVendor = 0x045e,
2274 .idProduct = 0x0723,
2275 .bInterfaceClass = USB_CLASS_VIDEO,
2276 .bInterfaceSubClass = 1,
2277 .bInterfaceProtocol = 0,
2278 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2279 /* Logitech, Webcam C910 */
2280 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2281 | USB_DEVICE_ID_MATCH_INT_INFO,
2282 .idVendor = 0x046d,
2283 .idProduct = 0x0821,
2284 .bInterfaceClass = USB_CLASS_VIDEO,
2285 .bInterfaceSubClass = 1,
2286 .bInterfaceProtocol = 0,
2287 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_WAKE_AUTOSUSPEND)},
2288 /* Logitech, Webcam B910 */
2289 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2290 | USB_DEVICE_ID_MATCH_INT_INFO,
2291 .idVendor = 0x046d,
2292 .idProduct = 0x0823,
2293 .bInterfaceClass = USB_CLASS_VIDEO,
2294 .bInterfaceSubClass = 1,
2295 .bInterfaceProtocol = 0,
2296 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_WAKE_AUTOSUSPEND)},
2297 /* Logitech Quickcam Fusion */
2298 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2299 | USB_DEVICE_ID_MATCH_INT_INFO,
2300 .idVendor = 0x046d,
2301 .idProduct = 0x08c1,
2302 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2303 .bInterfaceSubClass = 1,
2304 .bInterfaceProtocol = 0 },
2305 /* Logitech Quickcam Orbit MP */
2306 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2307 | USB_DEVICE_ID_MATCH_INT_INFO,
2308 .idVendor = 0x046d,
2309 .idProduct = 0x08c2,
2310 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2311 .bInterfaceSubClass = 1,
2312 .bInterfaceProtocol = 0 },
2313 /* Logitech Quickcam Pro for Notebook */
2314 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2315 | USB_DEVICE_ID_MATCH_INT_INFO,
2316 .idVendor = 0x046d,
2317 .idProduct = 0x08c3,
2318 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2319 .bInterfaceSubClass = 1,
2320 .bInterfaceProtocol = 0 },
2321 /* Logitech Quickcam Pro 5000 */
2322 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2323 | USB_DEVICE_ID_MATCH_INT_INFO,
2324 .idVendor = 0x046d,
2325 .idProduct = 0x08c5,
2326 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2327 .bInterfaceSubClass = 1,
2328 .bInterfaceProtocol = 0 },
2329 /* Logitech Quickcam OEM Dell Notebook */
2330 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2331 | USB_DEVICE_ID_MATCH_INT_INFO,
2332 .idVendor = 0x046d,
2333 .idProduct = 0x08c6,
2334 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2335 .bInterfaceSubClass = 1,
2336 .bInterfaceProtocol = 0 },
2337 /* Logitech Quickcam OEM Cisco VT Camera II */
2338 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2339 | USB_DEVICE_ID_MATCH_INT_INFO,
2340 .idVendor = 0x046d,
2341 .idProduct = 0x08c7,
2342 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2343 .bInterfaceSubClass = 1,
2344 .bInterfaceProtocol = 0 },
2345 /* Logitech HD Pro Webcam C920 */
2346 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2347 | USB_DEVICE_ID_MATCH_INT_INFO,
2348 .idVendor = 0x046d,
2349 .idProduct = 0x082d,
2350 .bInterfaceClass = USB_CLASS_VIDEO,
2351 .bInterfaceSubClass = 1,
2352 .bInterfaceProtocol = 0,
2353 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
2354 /* Chicony CNF7129 (Asus EEE 100HE) */
2355 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2356 | USB_DEVICE_ID_MATCH_INT_INFO,
2357 .idVendor = 0x04f2,
2358 .idProduct = 0xb071,
2359 .bInterfaceClass = USB_CLASS_VIDEO,
2360 .bInterfaceSubClass = 1,
2361 .bInterfaceProtocol = 0,
2362 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) },
2363 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2364 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2365 | USB_DEVICE_ID_MATCH_INT_INFO,
2366 .idVendor = 0x058f,
2367 .idProduct = 0x3820,
2368 .bInterfaceClass = USB_CLASS_VIDEO,
2369 .bInterfaceSubClass = 1,
2370 .bInterfaceProtocol = 0,
2371 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2372 /* Dell XPS m1530 */
2373 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2374 | USB_DEVICE_ID_MATCH_INT_INFO,
2375 .idVendor = 0x05a9,
2376 .idProduct = 0x2640,
2377 .bInterfaceClass = USB_CLASS_VIDEO,
2378 .bInterfaceSubClass = 1,
2379 .bInterfaceProtocol = 0,
2380 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2381 /* Dell SP2008WFP Monitor */
2382 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2383 | USB_DEVICE_ID_MATCH_INT_INFO,
2384 .idVendor = 0x05a9,
2385 .idProduct = 0x2641,
2386 .bInterfaceClass = USB_CLASS_VIDEO,
2387 .bInterfaceSubClass = 1,
2388 .bInterfaceProtocol = 0,
2389 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2390 /* Dell Alienware X51 */
2391 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2392 | USB_DEVICE_ID_MATCH_INT_INFO,
2393 .idVendor = 0x05a9,
2394 .idProduct = 0x2643,
2395 .bInterfaceClass = USB_CLASS_VIDEO,
2396 .bInterfaceSubClass = 1,
2397 .bInterfaceProtocol = 0,
2398 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2399 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2400 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2401 | USB_DEVICE_ID_MATCH_INT_INFO,
2402 .idVendor = 0x05a9,
2403 .idProduct = 0x264a,
2404 .bInterfaceClass = USB_CLASS_VIDEO,
2405 .bInterfaceSubClass = 1,
2406 .bInterfaceProtocol = 0,
2407 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2408 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2409 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2410 | USB_DEVICE_ID_MATCH_INT_INFO,
2411 .idVendor = 0x05a9,
2412 .idProduct = 0x7670,
2413 .bInterfaceClass = USB_CLASS_VIDEO,
2414 .bInterfaceSubClass = 1,
2415 .bInterfaceProtocol = 0,
2416 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2417 /* Apple Built-In iSight */
2418 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2419 | USB_DEVICE_ID_MATCH_INT_INFO,
2420 .idVendor = 0x05ac,
2421 .idProduct = 0x8501,
2422 .bInterfaceClass = USB_CLASS_VIDEO,
2423 .bInterfaceSubClass = 1,
2424 .bInterfaceProtocol = 0,
2425 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2426 | UVC_QUIRK_BUILTIN_ISIGHT) },
2427 /* Apple Built-In iSight via iBridge */
2428 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2429 | USB_DEVICE_ID_MATCH_INT_INFO,
2430 .idVendor = 0x05ac,
2431 .idProduct = 0x8600,
2432 .bInterfaceClass = USB_CLASS_VIDEO,
2433 .bInterfaceSubClass = 1,
2434 .bInterfaceProtocol = 0,
2435 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2436 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2437 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2438 | USB_DEVICE_ID_MATCH_INT_INFO,
2439 .idVendor = 0x05c8,
2440 .idProduct = 0x0403,
2441 .bInterfaceClass = USB_CLASS_VIDEO,
2442 .bInterfaceSubClass = 1,
2443 .bInterfaceProtocol = 0,
2444 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2445 /* Genesys Logic USB 2.0 PC Camera */
2446 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2447 | USB_DEVICE_ID_MATCH_INT_INFO,
2448 .idVendor = 0x05e3,
2449 .idProduct = 0x0505,
2450 .bInterfaceClass = USB_CLASS_VIDEO,
2451 .bInterfaceSubClass = 1,
2452 .bInterfaceProtocol = 0,
2453 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2454 /* Hercules Classic Silver */
2455 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2456 | USB_DEVICE_ID_MATCH_INT_INFO,
2457 .idVendor = 0x06f8,
2458 .idProduct = 0x300c,
2459 .bInterfaceClass = USB_CLASS_VIDEO,
2460 .bInterfaceSubClass = 1,
2461 .bInterfaceProtocol = 0,
2462 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2463 /* ViMicro Vega */
2464 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2465 | USB_DEVICE_ID_MATCH_INT_INFO,
2466 .idVendor = 0x0ac8,
2467 .idProduct = 0x332d,
2468 .bInterfaceClass = USB_CLASS_VIDEO,
2469 .bInterfaceSubClass = 1,
2470 .bInterfaceProtocol = 0,
2471 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2472 /* ViMicro - Minoru3D */
2473 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2474 | USB_DEVICE_ID_MATCH_INT_INFO,
2475 .idVendor = 0x0ac8,
2476 .idProduct = 0x3410,
2477 .bInterfaceClass = USB_CLASS_VIDEO,
2478 .bInterfaceSubClass = 1,
2479 .bInterfaceProtocol = 0,
2480 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2481 /* ViMicro Venus - Minoru3D */
2482 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2483 | USB_DEVICE_ID_MATCH_INT_INFO,
2484 .idVendor = 0x0ac8,
2485 .idProduct = 0x3420,
2486 .bInterfaceClass = USB_CLASS_VIDEO,
2487 .bInterfaceSubClass = 1,
2488 .bInterfaceProtocol = 0,
2489 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2490 /* Ophir Optronics - SPCAM 620U */
2491 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2492 | USB_DEVICE_ID_MATCH_INT_INFO,
2493 .idVendor = 0x0bd3,
2494 .idProduct = 0x0555,
2495 .bInterfaceClass = USB_CLASS_VIDEO,
2496 .bInterfaceSubClass = 1,
2497 .bInterfaceProtocol = 0,
2498 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2499 /* MT6227 */
2500 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2501 | USB_DEVICE_ID_MATCH_INT_INFO,
2502 .idVendor = 0x0e8d,
2503 .idProduct = 0x0004,
2504 .bInterfaceClass = USB_CLASS_VIDEO,
2505 .bInterfaceSubClass = 1,
2506 .bInterfaceProtocol = 0,
2507 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2508 | UVC_QUIRK_PROBE_DEF) },
2509 /* IMC Networks (Medion Akoya) */
2510 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2511 | USB_DEVICE_ID_MATCH_INT_INFO,
2512 .idVendor = 0x13d3,
2513 .idProduct = 0x5103,
2514 .bInterfaceClass = USB_CLASS_VIDEO,
2515 .bInterfaceSubClass = 1,
2516 .bInterfaceProtocol = 0,
2517 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2518 /* JMicron USB2.0 XGA WebCam */
2519 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2520 | USB_DEVICE_ID_MATCH_INT_INFO,
2521 .idVendor = 0x152d,
2522 .idProduct = 0x0310,
2523 .bInterfaceClass = USB_CLASS_VIDEO,
2524 .bInterfaceSubClass = 1,
2525 .bInterfaceProtocol = 0,
2526 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2527 /* Syntek (HP Spartan) */
2528 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2529 | USB_DEVICE_ID_MATCH_INT_INFO,
2530 .idVendor = 0x174f,
2531 .idProduct = 0x5212,
2532 .bInterfaceClass = USB_CLASS_VIDEO,
2533 .bInterfaceSubClass = 1,
2534 .bInterfaceProtocol = 0,
2535 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2536 /* Syntek (Samsung Q310) */
2537 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2538 | USB_DEVICE_ID_MATCH_INT_INFO,
2539 .idVendor = 0x174f,
2540 .idProduct = 0x5931,
2541 .bInterfaceClass = USB_CLASS_VIDEO,
2542 .bInterfaceSubClass = 1,
2543 .bInterfaceProtocol = 0,
2544 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2545 /* Syntek (Packard Bell EasyNote MX52 */
2546 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2547 | USB_DEVICE_ID_MATCH_INT_INFO,
2548 .idVendor = 0x174f,
2549 .idProduct = 0x8a12,
2550 .bInterfaceClass = USB_CLASS_VIDEO,
2551 .bInterfaceSubClass = 1,
2552 .bInterfaceProtocol = 0,
2553 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2554 /* Syntek (Asus F9SG) */
2555 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2556 | USB_DEVICE_ID_MATCH_INT_INFO,
2557 .idVendor = 0x174f,
2558 .idProduct = 0x8a31,
2559 .bInterfaceClass = USB_CLASS_VIDEO,
2560 .bInterfaceSubClass = 1,
2561 .bInterfaceProtocol = 0,
2562 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2563 /* Syntek (Asus U3S) */
2564 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2565 | USB_DEVICE_ID_MATCH_INT_INFO,
2566 .idVendor = 0x174f,
2567 .idProduct = 0x8a33,
2568 .bInterfaceClass = USB_CLASS_VIDEO,
2569 .bInterfaceSubClass = 1,
2570 .bInterfaceProtocol = 0,
2571 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2572 /* Syntek (JAOtech Smart Terminal) */
2573 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2574 | USB_DEVICE_ID_MATCH_INT_INFO,
2575 .idVendor = 0x174f,
2576 .idProduct = 0x8a34,
2577 .bInterfaceClass = USB_CLASS_VIDEO,
2578 .bInterfaceSubClass = 1,
2579 .bInterfaceProtocol = 0,
2580 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2581 /* Miricle 307K */
2582 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2583 | USB_DEVICE_ID_MATCH_INT_INFO,
2584 .idVendor = 0x17dc,
2585 .idProduct = 0x0202,
2586 .bInterfaceClass = USB_CLASS_VIDEO,
2587 .bInterfaceSubClass = 1,
2588 .bInterfaceProtocol = 0,
2589 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2590 /* Lenovo Thinkpad SL400/SL500 */
2591 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2592 | USB_DEVICE_ID_MATCH_INT_INFO,
2593 .idVendor = 0x17ef,
2594 .idProduct = 0x480b,
2595 .bInterfaceClass = USB_CLASS_VIDEO,
2596 .bInterfaceSubClass = 1,
2597 .bInterfaceProtocol = 0,
2598 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2599 /* Aveo Technology USB 2.0 Camera */
2600 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2601 | USB_DEVICE_ID_MATCH_INT_INFO,
2602 .idVendor = 0x1871,
2603 .idProduct = 0x0306,
2604 .bInterfaceClass = USB_CLASS_VIDEO,
2605 .bInterfaceSubClass = 1,
2606 .bInterfaceProtocol = 0,
2607 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2608 | UVC_QUIRK_PROBE_EXTRAFIELDS) },
2609 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2610 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2611 | USB_DEVICE_ID_MATCH_INT_INFO,
2612 .idVendor = 0x1871,
2613 .idProduct = 0x0516,
2614 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2615 .bInterfaceSubClass = 1,
2616 .bInterfaceProtocol = 0 },
2617 /* Ecamm Pico iMage */
2618 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2619 | USB_DEVICE_ID_MATCH_INT_INFO,
2620 .idVendor = 0x18cd,
2621 .idProduct = 0xcafe,
2622 .bInterfaceClass = USB_CLASS_VIDEO,
2623 .bInterfaceSubClass = 1,
2624 .bInterfaceProtocol = 0,
2625 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) },
2626 /* Manta MM-353 Plako */
2627 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2628 | USB_DEVICE_ID_MATCH_INT_INFO,
2629 .idVendor = 0x18ec,
2630 .idProduct = 0x3188,
2631 .bInterfaceClass = USB_CLASS_VIDEO,
2632 .bInterfaceSubClass = 1,
2633 .bInterfaceProtocol = 0,
2634 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2635 /* FSC WebCam V30S */
2636 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2637 | USB_DEVICE_ID_MATCH_INT_INFO,
2638 .idVendor = 0x18ec,
2639 .idProduct = 0x3288,
2640 .bInterfaceClass = USB_CLASS_VIDEO,
2641 .bInterfaceSubClass = 1,
2642 .bInterfaceProtocol = 0,
2643 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2644 /* Arkmicro unbranded */
2645 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2646 | USB_DEVICE_ID_MATCH_INT_INFO,
2647 .idVendor = 0x18ec,
2648 .idProduct = 0x3290,
2649 .bInterfaceClass = USB_CLASS_VIDEO,
2650 .bInterfaceSubClass = 1,
2651 .bInterfaceProtocol = 0,
2652 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2653 /* The Imaging Source USB CCD cameras */
2654 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2655 | USB_DEVICE_ID_MATCH_INT_INFO,
2656 .idVendor = 0x199e,
2657 .idProduct = 0x8102,
2658 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2659 .bInterfaceSubClass = 1,
2660 .bInterfaceProtocol = 0 },
2661 /* Bodelin ProScopeHR */
2662 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2663 | USB_DEVICE_ID_MATCH_DEV_HI
2664 | USB_DEVICE_ID_MATCH_INT_INFO,
2665 .idVendor = 0x19ab,
2666 .idProduct = 0x1000,
2667 .bcdDevice_hi = 0x0126,
2668 .bInterfaceClass = USB_CLASS_VIDEO,
2669 .bInterfaceSubClass = 1,
2670 .bInterfaceProtocol = 0,
2671 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) },
2672 /* MSI StarCam 370i */
2673 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2674 | USB_DEVICE_ID_MATCH_INT_INFO,
2675 .idVendor = 0x1b3b,
2676 .idProduct = 0x2951,
2677 .bInterfaceClass = USB_CLASS_VIDEO,
2678 .bInterfaceSubClass = 1,
2679 .bInterfaceProtocol = 0,
2680 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2681 /* Generalplus Technology Inc. 808 Camera */
2682 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2683 | USB_DEVICE_ID_MATCH_INT_INFO,
2684 .idVendor = 0x1b3f,
2685 .idProduct = 0x2002,
2686 .bInterfaceClass = USB_CLASS_VIDEO,
2687 .bInterfaceSubClass = 1,
2688 .bInterfaceProtocol = 0,
2689 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2690 /* SiGma Micro USB Web Camera */
2691 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2692 | USB_DEVICE_ID_MATCH_INT_INFO,
2693 .idVendor = 0x1c4f,
2694 .idProduct = 0x3000,
2695 .bInterfaceClass = USB_CLASS_VIDEO,
2696 .bInterfaceSubClass = 1,
2697 .bInterfaceProtocol = 0,
2698 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2699 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
2700 /* Oculus VR Positional Tracker DK2 */
2701 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2702 | USB_DEVICE_ID_MATCH_INT_INFO,
2703 .idVendor = 0x2833,
2704 .idProduct = 0x0201,
2705 .bInterfaceClass = USB_CLASS_VIDEO,
2706 .bInterfaceSubClass = 1,
2707 .bInterfaceProtocol = 0,
2708 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2709 /* Oculus VR Rift Sensor */
2710 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2711 | USB_DEVICE_ID_MATCH_INT_INFO,
2712 .idVendor = 0x2833,
2713 .idProduct = 0x0211,
2714 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2715 .bInterfaceSubClass = 1,
2716 .bInterfaceProtocol = 0,
2717 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2718 /* GEO Semiconductor GC6500 */
2719 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2720 | USB_DEVICE_ID_MATCH_INT_INFO,
2721 .idVendor = 0x29fe,
2722 .idProduct = 0x4d53,
2723 .bInterfaceClass = USB_CLASS_VIDEO,
2724 .bInterfaceSubClass = 1,
2725 .bInterfaceProtocol = 0,
2726 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) },
2727 /* Intel RealSense D4M */
2728 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2729 | USB_DEVICE_ID_MATCH_INT_INFO,
2730 .idVendor = 0x8086,
2731 .idProduct = 0x0b03,
2732 .bInterfaceClass = USB_CLASS_VIDEO,
2733 .bInterfaceSubClass = 1,
2734 .bInterfaceProtocol = 0,
2735 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) },
2736 /* Generic USB Video Class */
2737 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
2738 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
2739 {}
2740 };
2741
2742 MODULE_DEVICE_TABLE(usb, uvc_ids);
2743
2744 struct uvc_driver uvc_driver = {
2745 .driver = {
2746 .name = "uvcvideo",
2747 .probe = uvc_probe,
2748 .disconnect = uvc_disconnect,
2749 .suspend = uvc_suspend,
2750 .resume = uvc_resume,
2751 .reset_resume = uvc_reset_resume,
2752 .id_table = uvc_ids,
2753 .supports_autosuspend = 1,
2754 },
2755 };
2756
uvc_init(void)2757 static int __init uvc_init(void)
2758 {
2759 int ret;
2760
2761 uvc_debugfs_init();
2762
2763 ret = usb_register(&uvc_driver.driver);
2764 if (ret < 0) {
2765 uvc_debugfs_cleanup();
2766 return ret;
2767 }
2768
2769 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2770 return 0;
2771 }
2772
uvc_cleanup(void)2773 static void __exit uvc_cleanup(void)
2774 {
2775 usb_deregister(&uvc_driver.driver);
2776 uvc_debugfs_cleanup();
2777 }
2778
2779 module_init(uvc_init);
2780 module_exit(uvc_cleanup);
2781
2782 MODULE_AUTHOR(DRIVER_AUTHOR);
2783 MODULE_DESCRIPTION(DRIVER_DESC);
2784 MODULE_LICENSE("GPL");
2785 MODULE_VERSION(DRIVER_VERSION);
2786
2787