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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / media / video / uvc / uvc_driver.c
blob6459b8cba22384f88a04e28fb3e7cb6964d9d882
1 /*
2 * uvc_driver.c -- USB Video Class driver
3 *
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 */
13
14 /*
15 * This driver aims to support video input and ouput devices compliant with the
16 * 'USB Video Class' specification.
17 *
18 * The driver doesn't support the deprecated v4l1 interface. It implements the
19 * mmap capture method only, and doesn't do any image format conversion in
20 * software. If your user-space application doesn't support YUYV or MJPEG, fix
21 * it :-). Please note that the MJPEG data have been stripped from their
22 * Huffman tables (DHT marker), you will need to add it back if your JPEG
23 * codec can't handle MJPEG data.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/list.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/usb.h>
31 #include <linux/videodev2.h>
32 #include <linux/vmalloc.h>
33 #include <linux/wait.h>
34 #include <asm/atomic.h>
35 #include <asm/unaligned.h>
36
37 #include <media/v4l2-common.h>
38
39 #include "uvcvideo.h"
40
41 #define DRIVER_AUTHOR "Laurent Pinchart " \
42 "<laurent.pinchart@ideasonboard.com>"
43 #define DRIVER_DESC "USB Video Class driver"
44
45 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
46 unsigned int uvc_no_drop_param;
47 static unsigned int uvc_quirks_param = -1;
48 unsigned int uvc_trace_param;
49 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
50
51 /* ------------------------------------------------------------------------
52 * Video formats
53 */
54
55 static struct uvc_format_desc uvc_fmts[] = {
56 {
57 .name = "YUV 4:2:2 (YUYV)",
58 .guid = UVC_GUID_FORMAT_YUY2,
59 .fcc = V4L2_PIX_FMT_YUYV,
60 },
61 {
62 .name = "YUV 4:2:2 (YUYV)",
63 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
64 .fcc = V4L2_PIX_FMT_YUYV,
65 },
66 {
67 .name = "YUV 4:2:0 (NV12)",
68 .guid = UVC_GUID_FORMAT_NV12,
69 .fcc = V4L2_PIX_FMT_NV12,
70 },
71 {
72 .name = "MJPEG",
73 .guid = UVC_GUID_FORMAT_MJPEG,
74 .fcc = V4L2_PIX_FMT_MJPEG,
75 },
76 {
77 .name = "YVU 4:2:0 (YV12)",
78 .guid = UVC_GUID_FORMAT_YV12,
79 .fcc = V4L2_PIX_FMT_YVU420,
80 },
81 {
82 .name = "YUV 4:2:0 (I420)",
83 .guid = UVC_GUID_FORMAT_I420,
84 .fcc = V4L2_PIX_FMT_YUV420,
85 },
86 {
87 .name = "YUV 4:2:2 (UYVY)",
88 .guid = UVC_GUID_FORMAT_UYVY,
89 .fcc = V4L2_PIX_FMT_UYVY,
90 },
91 {
92 .name = "Greyscale (8-bit)",
93 .guid = UVC_GUID_FORMAT_Y800,
94 .fcc = V4L2_PIX_FMT_GREY,
95 },
96 {
97 .name = "Greyscale (16-bit)",
98 .guid = UVC_GUID_FORMAT_Y16,
99 .fcc = V4L2_PIX_FMT_Y16,
100 },
101 {
102 .name = "RGB Bayer",
103 .guid = UVC_GUID_FORMAT_BY8,
104 .fcc = V4L2_PIX_FMT_SBGGR8,
105 },
106 };
107
108 /* ------------------------------------------------------------------------
109 * Utility functions
110 */
111
112 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
113 __u8 epaddr)
114 {
115 struct usb_host_endpoint *ep;
116 unsigned int i;
117
118 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
119 ep = &alts->endpoint[i];
120 if (ep->desc.bEndpointAddress == epaddr)
121 return ep;
122 }
123
124 return NULL;
125 }
126
127 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
128 {
129 unsigned int len = ARRAY_SIZE(uvc_fmts);
130 unsigned int i;
131
132 for (i = 0; i < len; ++i) {
133 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
134 return &uvc_fmts[i];
135 }
136
137 return NULL;
138 }
139
140 static __u32 uvc_colorspace(const __u8 primaries)
141 {
142 static const __u8 colorprimaries[] = {
143 0,
144 V4L2_COLORSPACE_SRGB,
145 V4L2_COLORSPACE_470_SYSTEM_M,
146 V4L2_COLORSPACE_470_SYSTEM_BG,
147 V4L2_COLORSPACE_SMPTE170M,
148 V4L2_COLORSPACE_SMPTE240M,
149 };
150
151 if (primaries < ARRAY_SIZE(colorprimaries))
152 return colorprimaries[primaries];
153
154 return 0;
155 }
156
157 /* Simplify a fraction using a simple continued fraction decomposition. The
158 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
159 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
160 * arbitrary parameters to remove non-significative terms from the simple
161 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
162 * respectively seems to give nice results.
163 */
164 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
165 unsigned int n_terms, unsigned int threshold)
166 {
167 uint32_t *an;
168 uint32_t x, y, r;
169 unsigned int i, n;
170
171 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
172 if (an == NULL)
173 return;
174
175 /* Convert the fraction to a simple continued fraction. See
176 * http://mathforum.org/dr.math/faq/faq.fractions.html
177 * Stop if the current term is bigger than or equal to the given
178 * threshold.
179 */
180 x = *numerator;
181 y = *denominator;
182
183 for (n = 0; n < n_terms && y != 0; ++n) {
184 an[n] = x / y;
185 if (an[n] >= threshold) {
186 if (n < 2)
187 n++;
188 break;
189 }
190
191 r = x - an[n] * y;
192 x = y;
193 y = r;
194 }
195
196 /* Expand the simple continued fraction back to an integer fraction. */
197 x = 0;
198 y = 1;
199
200 for (i = n; i > 0; --i) {
201 r = y;
202 y = an[i-1] * y + x;
203 x = r;
204 }
205
206 *numerator = y;
207 *denominator = x;
208 kfree(an);
209 }
210
211 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
212 * to compute numerator / denominator * 10000000 using 32 bit fixed point
213 * arithmetic only.
214 */
215 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
216 {
217 uint32_t multiplier;
218
219 /* Saturate the result if the operation would overflow. */
220 if (denominator == 0 ||
221 numerator/denominator >= ((uint32_t)-1)/10000000)
222 return (uint32_t)-1;
223
224 /* Divide both the denominator and the multiplier by two until
225 * numerator * multiplier doesn't overflow. If anyone knows a better
226 * algorithm please let me know.
227 */
228 multiplier = 10000000;
229 while (numerator > ((uint32_t)-1)/multiplier) {
230 multiplier /= 2;
231 denominator /= 2;
232 }
233
234 return denominator ? numerator * multiplier / denominator : 0;
235 }
236
237 /* ------------------------------------------------------------------------
238 * Terminal and unit management
239 */
240
241 static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
242 {
243 struct uvc_entity *entity;
244
245 list_for_each_entry(entity, &dev->entities, list) {
246 if (entity->id == id)
247 return entity;
248 }
249
250 return NULL;
251 }
252
253 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
254 int id, struct uvc_entity *entity)
255 {
256 unsigned int i;
257
258 if (entity == NULL)
259 entity = list_entry(&dev->entities, struct uvc_entity, list);
260
261 list_for_each_entry_continue(entity, &dev->entities, list) {
262 for (i = 0; i < entity->bNrInPins; ++i)
263 if (entity->baSourceID[i] == id)
264 return entity;
265 }
266
267 return NULL;
268 }
269
270 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
271 {
272 struct uvc_streaming *stream;
273
274 list_for_each_entry(stream, &dev->streams, list) {
275 if (stream->header.bTerminalLink == id)
276 return stream;
277 }
278
279 return NULL;
280 }
281
282 /* ------------------------------------------------------------------------
283 * Descriptors parsing
284 */
285
286 static int uvc_parse_format(struct uvc_device *dev,
287 struct uvc_streaming *streaming, struct uvc_format *format,
288 __u32 **intervals, unsigned char *buffer, int buflen)
289 {
290 struct usb_interface *intf = streaming->intf;
291 struct usb_host_interface *alts = intf->cur_altsetting;
292 struct uvc_format_desc *fmtdesc;
293 struct uvc_frame *frame;
294 const unsigned char *start = buffer;
295 unsigned int interval;
296 unsigned int i, n;
297 __u8 ftype;
298
299 format->type = buffer[2];
300 format->index = buffer[3];
301
302 switch (buffer[2]) {
303 case UVC_VS_FORMAT_UNCOMPRESSED:
304 case UVC_VS_FORMAT_FRAME_BASED:
305 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
306 if (buflen < n) {
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 /* Find the format descriptor from its GUID. */
315 fmtdesc = uvc_format_by_guid(&buffer[5]);
316
317 if (fmtdesc != NULL) {
318 strlcpy(format->name, fmtdesc->name,
319 sizeof format->name);
320 format->fcc = fmtdesc->fcc;
321 } else {
322 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
323 &buffer[5]);
324 snprintf(format->name, sizeof(format->name), "%pUl\n",
325 &buffer[5]);
326 format->fcc = 0;
327 }
328
329 format->bpp = buffer[21];
330 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
331 ftype = UVC_VS_FRAME_UNCOMPRESSED;
332 } else {
333 ftype = UVC_VS_FRAME_FRAME_BASED;
334 if (buffer[27])
335 format->flags = UVC_FMT_FLAG_COMPRESSED;
336 }
337 break;
338
339 case UVC_VS_FORMAT_MJPEG:
340 if (buflen < 11) {
341 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
342 "interface %d FORMAT error\n",
343 dev->udev->devnum,
344 alts->desc.bInterfaceNumber);
345 return -EINVAL;
346 }
347
348 strlcpy(format->name, "MJPEG", sizeof format->name);
349 format->fcc = V4L2_PIX_FMT_MJPEG;
350 format->flags = UVC_FMT_FLAG_COMPRESSED;
351 format->bpp = 0;
352 ftype = UVC_VS_FRAME_MJPEG;
353 break;
354
355 case UVC_VS_FORMAT_DV:
356 if (buflen < 9) {
357 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
358 "interface %d FORMAT error\n",
359 dev->udev->devnum,
360 alts->desc.bInterfaceNumber);
361 return -EINVAL;
362 }
363
364 switch (buffer[8] & 0x7f) {
365 case 0:
366 strlcpy(format->name, "SD-DV", sizeof format->name);
367 break;
368 case 1:
369 strlcpy(format->name, "SDL-DV", sizeof format->name);
370 break;
371 case 2:
372 strlcpy(format->name, "HD-DV", sizeof format->name);
373 break;
374 default:
375 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
376 "interface %d: unknown DV format %u\n",
377 dev->udev->devnum,
378 alts->desc.bInterfaceNumber, buffer[8]);
379 return -EINVAL;
380 }
381
382 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
383 sizeof format->name);
384
385 format->fcc = V4L2_PIX_FMT_DV;
386 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
387 format->bpp = 0;
388 ftype = 0;
389
390 /* Create a dummy frame descriptor. */
391 frame = &format->frame[0];
392 memset(&format->frame[0], 0, sizeof format->frame[0]);
393 frame->bFrameIntervalType = 1;
394 frame->dwDefaultFrameInterval = 1;
395 frame->dwFrameInterval = *intervals;
396 *(*intervals)++ = 1;
397 format->nframes = 1;
398 break;
399
400 case UVC_VS_FORMAT_MPEG2TS:
401 case UVC_VS_FORMAT_STREAM_BASED:
402 /* Not supported yet. */
403 default:
404 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
405 "interface %d unsupported format %u\n",
406 dev->udev->devnum, alts->desc.bInterfaceNumber,
407 buffer[2]);
408 return -EINVAL;
409 }
410
411 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
412
413 buflen -= buffer[0];
414 buffer += buffer[0];
415
416 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
417 * based formats have frame descriptors.
418 */
419 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
420 buffer[2] == ftype) {
421 frame = &format->frame[format->nframes];
422 if (ftype != UVC_VS_FRAME_FRAME_BASED)
423 n = buflen > 25 ? buffer[25] : 0;
424 else
425 n = buflen > 21 ? buffer[21] : 0;
426
427 n = n ? n : 3;
428
429 if (buflen < 26 + 4*n) {
430 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
431 "interface %d FRAME error\n", dev->udev->devnum,
432 alts->desc.bInterfaceNumber);
433 return -EINVAL;
434 }
435
436 frame->bFrameIndex = buffer[3];
437 frame->bmCapabilities = buffer[4];
438 frame->wWidth = get_unaligned_le16(&buffer[5]);
439 frame->wHeight = get_unaligned_le16(&buffer[7]);
440 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
441 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
442 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
443 frame->dwMaxVideoFrameBufferSize =
444 get_unaligned_le32(&buffer[17]);
445 frame->dwDefaultFrameInterval =
446 get_unaligned_le32(&buffer[21]);
447 frame->bFrameIntervalType = buffer[25];
448 } else {
449 frame->dwMaxVideoFrameBufferSize = 0;
450 frame->dwDefaultFrameInterval =
451 get_unaligned_le32(&buffer[17]);
452 frame->bFrameIntervalType = buffer[21];
453 }
454 frame->dwFrameInterval = *intervals;
455
456 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
457 * completely. Observed behaviours range from setting the
458 * value to 1.1x the actual frame size to hardwiring the
459 * 16 low bits to 0. This results in a higher than necessary
460 * memory usage as well as a wrong image size information. For
461 * uncompressed formats this can be fixed by computing the
462 * value from the frame size.
463 */
464 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
465 frame->dwMaxVideoFrameBufferSize = format->bpp
466 * frame->wWidth * frame->wHeight / 8;
467
468 /* Some bogus devices report dwMinFrameInterval equal to
469 * dwMaxFrameInterval and have dwFrameIntervalStep set to
470 * zero. Setting all null intervals to 1 fixes the problem and
471 * some other divisions by zero that could happen.
472 */
473 for (i = 0; i < n; ++i) {
474 interval = get_unaligned_le32(&buffer[26+4*i]);
475 *(*intervals)++ = interval ? interval : 1;
476 }
477
478 /* Make sure that the default frame interval stays between
479 * the boundaries.
480 */
481 n -= frame->bFrameIntervalType ? 1 : 2;
482 frame->dwDefaultFrameInterval =
483 min(frame->dwFrameInterval[n],
484 max(frame->dwFrameInterval[0],
485 frame->dwDefaultFrameInterval));
486
487 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
488 frame->bFrameIntervalType = 1;
489 frame->dwFrameInterval[0] =
490 frame->dwDefaultFrameInterval;
491 }
492
493 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
494 frame->wWidth, frame->wHeight,
495 10000000/frame->dwDefaultFrameInterval,
496 (100000000/frame->dwDefaultFrameInterval)%10);
497
498 format->nframes++;
499 buflen -= buffer[0];
500 buffer += buffer[0];
501 }
502
503 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
504 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
505 buflen -= buffer[0];
506 buffer += buffer[0];
507 }
508
509 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
510 buffer[2] == UVC_VS_COLORFORMAT) {
511 if (buflen < 6) {
512 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
513 "interface %d COLORFORMAT error\n",
514 dev->udev->devnum,
515 alts->desc.bInterfaceNumber);
516 return -EINVAL;
517 }
518
519 format->colorspace = uvc_colorspace(buffer[3]);
520
521 buflen -= buffer[0];
522 buffer += buffer[0];
523 }
524
525 return buffer - start;
526 }
527
528 static int uvc_parse_streaming(struct uvc_device *dev,
529 struct usb_interface *intf)
530 {
531 struct uvc_streaming *streaming = NULL;
532 struct uvc_format *format;
533 struct uvc_frame *frame;
534 struct usb_host_interface *alts = &intf->altsetting[0];
535 unsigned char *_buffer, *buffer = alts->extra;
536 int _buflen, buflen = alts->extralen;
537 unsigned int nformats = 0, nframes = 0, nintervals = 0;
538 unsigned int size, i, n, p;
539 __u32 *interval;
540 __u16 psize;
541 int ret = -EINVAL;
542
543 if (intf->cur_altsetting->desc.bInterfaceSubClass
544 != UVC_SC_VIDEOSTREAMING) {
545 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
546 "video streaming interface\n", dev->udev->devnum,
547 intf->altsetting[0].desc.bInterfaceNumber);
548 return -EINVAL;
549 }
550
551 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
552 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
553 "claimed\n", dev->udev->devnum,
554 intf->altsetting[0].desc.bInterfaceNumber);
555 return -EINVAL;
556 }
557
558 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
559 if (streaming == NULL) {
560 usb_driver_release_interface(&uvc_driver.driver, intf);
561 return -EINVAL;
562 }
563
564 mutex_init(&streaming->mutex);
565 streaming->dev = dev;
566 streaming->intf = usb_get_intf(intf);
567 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
568
569 /* The Pico iMage webcam has its class-specific interface descriptors
570 * after the endpoint descriptors.
571 */
572 if (buflen == 0) {
573 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
574 struct usb_host_endpoint *ep = &alts->endpoint[i];
575
576 if (ep->extralen == 0)
577 continue;
578
579 if (ep->extralen > 2 &&
580 ep->extra[1] == USB_DT_CS_INTERFACE) {
581 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
582 "from endpoint %u.\n", i);
583 buffer = alts->endpoint[i].extra;
584 buflen = alts->endpoint[i].extralen;
585 break;
586 }
587 }
588 }
589
590 /* Skip the standard interface descriptors. */
591 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
592 buflen -= buffer[0];
593 buffer += buffer[0];
594 }
595
596 if (buflen <= 2) {
597 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
598 "interface descriptors found.\n");
599 goto error;
600 }
601
602 /* Parse the header descriptor. */
603 switch (buffer[2]) {
604 case UVC_VS_OUTPUT_HEADER:
605 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
606 size = 9;
607 break;
608
609 case UVC_VS_INPUT_HEADER:
610 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
611 size = 13;
612 break;
613
614 default:
615 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
616 "%d HEADER descriptor not found.\n", dev->udev->devnum,
617 alts->desc.bInterfaceNumber);
618 goto error;
619 }
620
621 p = buflen >= 4 ? buffer[3] : 0;
622 n = buflen >= size ? buffer[size-1] : 0;
623
624 if (buflen < size + p*n) {
625 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
626 "interface %d HEADER descriptor is invalid.\n",
627 dev->udev->devnum, alts->desc.bInterfaceNumber);
628 goto error;
629 }
630
631 streaming->header.bNumFormats = p;
632 streaming->header.bEndpointAddress = buffer[6];
633 if (buffer[2] == UVC_VS_INPUT_HEADER) {
634 streaming->header.bmInfo = buffer[7];
635 streaming->header.bTerminalLink = buffer[8];
636 streaming->header.bStillCaptureMethod = buffer[9];
637 streaming->header.bTriggerSupport = buffer[10];
638 streaming->header.bTriggerUsage = buffer[11];
639 } else {
640 streaming->header.bTerminalLink = buffer[7];
641 }
642 streaming->header.bControlSize = n;
643
644 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
645 GFP_KERNEL);
646 if (streaming->header.bmaControls == NULL) {
647 ret = -ENOMEM;
648 goto error;
649 }
650
651 buflen -= buffer[0];
652 buffer += buffer[0];
653
654 _buffer = buffer;
655 _buflen = buflen;
656
657 /* Count the format and frame descriptors. */
658 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
659 switch (_buffer[2]) {
660 case UVC_VS_FORMAT_UNCOMPRESSED:
661 case UVC_VS_FORMAT_MJPEG:
662 case UVC_VS_FORMAT_FRAME_BASED:
663 nformats++;
664 break;
665
666 case UVC_VS_FORMAT_DV:
667 /* DV format has no frame descriptor. We will create a
668 * dummy frame descriptor with a dummy frame interval.
669 */
670 nformats++;
671 nframes++;
672 nintervals++;
673 break;
674
675 case UVC_VS_FORMAT_MPEG2TS:
676 case UVC_VS_FORMAT_STREAM_BASED:
677 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
678 "interface %d FORMAT %u is not supported.\n",
679 dev->udev->devnum,
680 alts->desc.bInterfaceNumber, _buffer[2]);
681 break;
682
683 case UVC_VS_FRAME_UNCOMPRESSED:
684 case UVC_VS_FRAME_MJPEG:
685 nframes++;
686 if (_buflen > 25)
687 nintervals += _buffer[25] ? _buffer[25] : 3;
688 break;
689
690 case UVC_VS_FRAME_FRAME_BASED:
691 nframes++;
692 if (_buflen > 21)
693 nintervals += _buffer[21] ? _buffer[21] : 3;
694 break;
695 }
696
697 _buflen -= _buffer[0];
698 _buffer += _buffer[0];
699 }
700
701 if (nformats == 0) {
702 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
703 "%d has no supported formats defined.\n",
704 dev->udev->devnum, alts->desc.bInterfaceNumber);
705 goto error;
706 }
707
708 size = nformats * sizeof *format + nframes * sizeof *frame
709 + nintervals * sizeof *interval;
710 format = kzalloc(size, GFP_KERNEL);
711 if (format == NULL) {
712 ret = -ENOMEM;
713 goto error;
714 }
715
716 frame = (struct uvc_frame *)&format[nformats];
717 interval = (__u32 *)&frame[nframes];
718
719 streaming->format = format;
720 streaming->nformats = nformats;
721
722 /* Parse the format descriptors. */
723 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
724 switch (buffer[2]) {
725 case UVC_VS_FORMAT_UNCOMPRESSED:
726 case UVC_VS_FORMAT_MJPEG:
727 case UVC_VS_FORMAT_DV:
728 case UVC_VS_FORMAT_FRAME_BASED:
729 format->frame = frame;
730 ret = uvc_parse_format(dev, streaming, format,
731 &interval, buffer, buflen);
732 if (ret < 0)
733 goto error;
734
735 frame += format->nframes;
736 format++;
737
738 buflen -= ret;
739 buffer += ret;
740 continue;
741
742 default:
743 break;
744 }
745
746 buflen -= buffer[0];
747 buffer += buffer[0];
748 }
749
750 if (buflen)
751 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
752 "%d has %u bytes of trailing descriptor garbage.\n",
753 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
754
755 /* Parse the alternate settings to find the maximum bandwidth. */
756 for (i = 0; i < intf->num_altsetting; ++i) {
757 struct usb_host_endpoint *ep;
758 alts = &intf->altsetting[i];
759 ep = uvc_find_endpoint(alts,
760 streaming->header.bEndpointAddress);
761 if (ep == NULL)
762 continue;
763
764 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
765 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
766 if (psize > streaming->maxpsize)
767 streaming->maxpsize = psize;
768 }
769
770 list_add_tail(&streaming->list, &dev->streams);
771 return 0;
772
773 error:
774 usb_driver_release_interface(&uvc_driver.driver, intf);
775 usb_put_intf(intf);
776 kfree(streaming->format);
777 kfree(streaming->header.bmaControls);
778 kfree(streaming);
779 return ret;
780 }
781
782 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
783 unsigned int num_pads, unsigned int extra_size)
784 {
785 struct uvc_entity *entity;
786 unsigned int num_inputs;
787 unsigned int size;
788
789 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
790 size = sizeof(*entity) + extra_size + num_inputs;
791 entity = kzalloc(size, GFP_KERNEL);
792 if (entity == NULL)
793 return NULL;
794
795 entity->id = id;
796 entity->type = type;
797
798 entity->bNrInPins = num_inputs;
799 entity->baSourceID = ((__u8 *)entity) + sizeof(*entity) + extra_size;
800
801 return entity;
802 }
803
804 /* Parse vendor-specific extensions. */
805 static int uvc_parse_vendor_control(struct uvc_device *dev,
806 const unsigned char *buffer, int buflen)
807 {
808 struct usb_device *udev = dev->udev;
809 struct usb_host_interface *alts = dev->intf->cur_altsetting;
810 struct uvc_entity *unit;
811 unsigned int n, p;
812 int handled = 0;
813
814 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
815 case 0x046d: /* Logitech */
816 if (buffer[1] != 0x41 || buffer[2] != 0x01)
817 break;
818
819 /* Logitech implements several vendor specific functions
820 * through vendor specific extension units (LXU).
821 *
822 * The LXU descriptors are similar to XU descriptors
823 * (see "USB Device Video Class for Video Devices", section
824 * 3.7.2.6 "Extension Unit Descriptor") with the following
825 * differences:
826 *
827 * ----------------------------------------------------------
828 * 0 bLength 1 Number
829 * Size of this descriptor, in bytes: 24+p+n*2
830 * ----------------------------------------------------------
831 * 23+p+n bmControlsType N Bitmap
832 * Individual bits in the set are defined:
833 * 0: Absolute
834 * 1: Relative
835 *
836 * This bitset is mapped exactly the same as bmControls.
837 * ----------------------------------------------------------
838 * 23+p+n*2 bReserved 1 Boolean
839 * ----------------------------------------------------------
840 * 24+p+n*2 iExtension 1 Index
841 * Index of a string descriptor that describes this
842 * extension unit.
843 * ----------------------------------------------------------
844 */
845 p = buflen >= 22 ? buffer[21] : 0;
846 n = buflen >= 25 + p ? buffer[22+p] : 0;
847
848 if (buflen < 25 + p + 2*n) {
849 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
850 "interface %d EXTENSION_UNIT error\n",
851 udev->devnum, alts->desc.bInterfaceNumber);
852 break;
853 }
854
855 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
856 p + 1, 2*n);
857 if (unit == NULL)
858 return -ENOMEM;
859
860 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
861 unit->extension.bNumControls = buffer[20];
862 memcpy(unit->baSourceID, &buffer[22], p);
863 unit->extension.bControlSize = buffer[22+p];
864 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
865 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
866 + n;
867 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
868
869 if (buffer[24+p+2*n] != 0)
870 usb_string(udev, buffer[24+p+2*n], unit->name,
871 sizeof unit->name);
872 else
873 sprintf(unit->name, "Extension %u", buffer[3]);
874
875 list_add_tail(&unit->list, &dev->entities);
876 handled = 1;
877 break;
878 }
879
880 return handled;
881 }
882
883 static int uvc_parse_standard_control(struct uvc_device *dev,
884 const unsigned char *buffer, int buflen)
885 {
886 struct usb_device *udev = dev->udev;
887 struct uvc_entity *unit, *term;
888 struct usb_interface *intf;
889 struct usb_host_interface *alts = dev->intf->cur_altsetting;
890 unsigned int i, n, p, len;
891 __u16 type;
892
893 switch (buffer[2]) {
894 case UVC_VC_HEADER:
895 n = buflen >= 12 ? buffer[11] : 0;
896
897 if (buflen < 12 || buflen < 12 + n) {
898 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
899 "interface %d HEADER error\n", udev->devnum,
900 alts->desc.bInterfaceNumber);
901 return -EINVAL;
902 }
903
904 dev->uvc_version = get_unaligned_le16(&buffer[3]);
905 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
906
907 /* Parse all USB Video Streaming interfaces. */
908 for (i = 0; i < n; ++i) {
909 intf = usb_ifnum_to_if(udev, buffer[12+i]);
910 if (intf == NULL) {
911 uvc_trace(UVC_TRACE_DESCR, "device %d "
912 "interface %d doesn't exists\n",
913 udev->devnum, i);
914 continue;
915 }
916
917 uvc_parse_streaming(dev, intf);
918 }
919 break;
920
921 case UVC_VC_INPUT_TERMINAL:
922 if (buflen < 8) {
923 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
924 "interface %d INPUT_TERMINAL error\n",
925 udev->devnum, alts->desc.bInterfaceNumber);
926 return -EINVAL;
927 }
928
929 /* Make sure the terminal type MSB is not null, otherwise it
930 * could be confused with a unit.
931 */
932 type = get_unaligned_le16(&buffer[4]);
933 if ((type & 0xff00) == 0) {
934 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
935 "interface %d INPUT_TERMINAL %d has invalid "
936 "type 0x%04x, skipping\n", udev->devnum,
937 alts->desc.bInterfaceNumber,
938 buffer[3], type);
939 return 0;
940 }
941
942 n = 0;
943 p = 0;
944 len = 8;
945
946 if (type == UVC_ITT_CAMERA) {
947 n = buflen >= 15 ? buffer[14] : 0;
948 len = 15;
949
950 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
951 n = buflen >= 9 ? buffer[8] : 0;
952 p = buflen >= 10 + n ? buffer[9+n] : 0;
953 len = 10;
954 }
955
956 if (buflen < len + n + p) {
957 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
958 "interface %d INPUT_TERMINAL error\n",
959 udev->devnum, alts->desc.bInterfaceNumber);
960 return -EINVAL;
961 }
962
963 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
964 1, n + p);
965 if (term == NULL)
966 return -ENOMEM;
967
968 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
969 term->camera.bControlSize = n;
970 term->camera.bmControls = (__u8 *)term + sizeof *term;
971 term->camera.wObjectiveFocalLengthMin =
972 get_unaligned_le16(&buffer[8]);
973 term->camera.wObjectiveFocalLengthMax =
974 get_unaligned_le16(&buffer[10]);
975 term->camera.wOcularFocalLength =
976 get_unaligned_le16(&buffer[12]);
977 memcpy(term->camera.bmControls, &buffer[15], n);
978 } else if (UVC_ENTITY_TYPE(term) ==
979 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
980 term->media.bControlSize = n;
981 term->media.bmControls = (__u8 *)term + sizeof *term;
982 term->media.bTransportModeSize = p;
983 term->media.bmTransportModes = (__u8 *)term
984 + sizeof *term + n;
985 memcpy(term->media.bmControls, &buffer[9], n);
986 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
987 }
988
989 if (buffer[7] != 0)
990 usb_string(udev, buffer[7], term->name,
991 sizeof term->name);
992 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
993 sprintf(term->name, "Camera %u", buffer[3]);
994 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
995 sprintf(term->name, "Media %u", buffer[3]);
996 else
997 sprintf(term->name, "Input %u", buffer[3]);
998
999 list_add_tail(&term->list, &dev->entities);
1000 break;
1001
1002 case UVC_VC_OUTPUT_TERMINAL:
1003 if (buflen < 9) {
1004 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1005 "interface %d OUTPUT_TERMINAL error\n",
1006 udev->devnum, alts->desc.bInterfaceNumber);
1007 return -EINVAL;
1008 }
1009
1010 /* Make sure the terminal type MSB is not null, otherwise it
1011 * could be confused with a unit.
1012 */
1013 type = get_unaligned_le16(&buffer[4]);
1014 if ((type & 0xff00) == 0) {
1015 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1016 "interface %d OUTPUT_TERMINAL %d has invalid "
1017 "type 0x%04x, skipping\n", udev->devnum,
1018 alts->desc.bInterfaceNumber, buffer[3], type);
1019 return 0;
1020 }
1021
1022 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1023 1, 0);
1024 if (term == NULL)
1025 return -ENOMEM;
1026
1027 memcpy(term->baSourceID, &buffer[7], 1);
1028
1029 if (buffer[8] != 0)
1030 usb_string(udev, buffer[8], term->name,
1031 sizeof term->name);
1032 else
1033 sprintf(term->name, "Output %u", buffer[3]);
1034
1035 list_add_tail(&term->list, &dev->entities);
1036 break;
1037
1038 case UVC_VC_SELECTOR_UNIT:
1039 p = buflen >= 5 ? buffer[4] : 0;
1040
1041 if (buflen < 5 || buflen < 6 + p) {
1042 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1043 "interface %d SELECTOR_UNIT error\n",
1044 udev->devnum, alts->desc.bInterfaceNumber);
1045 return -EINVAL;
1046 }
1047
1048 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1049 if (unit == NULL)
1050 return -ENOMEM;
1051
1052 memcpy(unit->baSourceID, &buffer[5], p);
1053
1054 if (buffer[5+p] != 0)
1055 usb_string(udev, buffer[5+p], unit->name,
1056 sizeof unit->name);
1057 else
1058 sprintf(unit->name, "Selector %u", buffer[3]);
1059
1060 list_add_tail(&unit->list, &dev->entities);
1061 break;
1062
1063 case UVC_VC_PROCESSING_UNIT:
1064 n = buflen >= 8 ? buffer[7] : 0;
1065 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1066
1067 if (buflen < p + n) {
1068 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1069 "interface %d PROCESSING_UNIT error\n",
1070 udev->devnum, alts->desc.bInterfaceNumber);
1071 return -EINVAL;
1072 }
1073
1074 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1075 if (unit == NULL)
1076 return -ENOMEM;
1077
1078 memcpy(unit->baSourceID, &buffer[4], 1);
1079 unit->processing.wMaxMultiplier =
1080 get_unaligned_le16(&buffer[5]);
1081 unit->processing.bControlSize = buffer[7];
1082 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1083 memcpy(unit->processing.bmControls, &buffer[8], n);
1084 if (dev->uvc_version >= 0x0110)
1085 unit->processing.bmVideoStandards = buffer[9+n];
1086
1087 if (buffer[8+n] != 0)
1088 usb_string(udev, buffer[8+n], unit->name,
1089 sizeof unit->name);
1090 else
1091 sprintf(unit->name, "Processing %u", buffer[3]);
1092
1093 list_add_tail(&unit->list, &dev->entities);
1094 break;
1095
1096 case UVC_VC_EXTENSION_UNIT:
1097 p = buflen >= 22 ? buffer[21] : 0;
1098 n = buflen >= 24 + p ? buffer[22+p] : 0;
1099
1100 if (buflen < 24 + p + n) {
1101 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1102 "interface %d EXTENSION_UNIT error\n",
1103 udev->devnum, alts->desc.bInterfaceNumber);
1104 return -EINVAL;
1105 }
1106
1107 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1108 if (unit == NULL)
1109 return -ENOMEM;
1110
1111 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1112 unit->extension.bNumControls = buffer[20];
1113 memcpy(unit->baSourceID, &buffer[22], p);
1114 unit->extension.bControlSize = buffer[22+p];
1115 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
1116 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1117
1118 if (buffer[23+p+n] != 0)
1119 usb_string(udev, buffer[23+p+n], unit->name,
1120 sizeof unit->name);
1121 else
1122 sprintf(unit->name, "Extension %u", buffer[3]);
1123
1124 list_add_tail(&unit->list, &dev->entities);
1125 break;
1126
1127 default:
1128 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1129 "descriptor (%u)\n", buffer[2]);
1130 break;
1131 }
1132
1133 return 0;
1134 }
1135
1136 static int uvc_parse_control(struct uvc_device *dev)
1137 {
1138 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1139 unsigned char *buffer = alts->extra;
1140 int buflen = alts->extralen;
1141 int ret;
1142
1143 /* Parse the default alternate setting only, as the UVC specification
1144 * defines a single alternate setting, the default alternate setting
1145 * zero.
1146 */
1147
1148 while (buflen > 2) {
1149 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1150 buffer[1] != USB_DT_CS_INTERFACE)
1151 goto next_descriptor;
1152
1153 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1154 return ret;
1155
1156 next_descriptor:
1157 buflen -= buffer[0];
1158 buffer += buffer[0];
1159 }
1160
1161 /* Check if the optional status endpoint is present. Built-in iSight
1162 * webcams have an interrupt endpoint but spit proprietary data that
1163 * don't conform to the UVC status endpoint messages. Don't try to
1164 * handle the interrupt endpoint for those cameras.
1165 */
1166 if (alts->desc.bNumEndpoints == 1 &&
1167 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1168 struct usb_host_endpoint *ep = &alts->endpoint[0];
1169 struct usb_endpoint_descriptor *desc = &ep->desc;
1170
1171 if (usb_endpoint_is_int_in(desc) &&
1172 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1173 desc->bInterval != 0) {
1174 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1175 "(addr %02x).\n", desc->bEndpointAddress);
1176 dev->int_ep = ep;
1177 }
1178 }
1179
1180 return 0;
1181 }
1182
1183 /* ------------------------------------------------------------------------
1184 * UVC device scan
1185 */
1186
1187 /*
1188 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1189 * and containing the following units:
1190 *
1191 * - one or more Output Terminals (USB Streaming or Display)
1192 * - zero or one Processing Unit
1193 * - zero, one or more single-input Selector Units
1194 * - zero or one multiple-input Selector Units, provided all inputs are
1195 * connected to input terminals
1196 * - zero, one or mode single-input Extension Units
1197 * - one or more Input Terminals (Camera, External or USB Streaming)
1198 *
1199 * The terminal and units must match on of the following structures:
1200 *
1201 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1202 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1203 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1204 *
1205 * +---------+ +---------+ -> OTT_*(0)
1206 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1207 * +---------+ +---------+ -> OTT_*(n)
1208 *
1209 * The Processing Unit and Extension Units can be in any order. Additional
1210 * Extension Units connected to the main chain as single-unit branches are
1211 * also supported. Single-input Selector Units are ignored.
1212 */
1213 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1214 struct uvc_entity *entity)
1215 {
1216 switch (UVC_ENTITY_TYPE(entity)) {
1217 case UVC_VC_EXTENSION_UNIT:
1218 if (uvc_trace_param & UVC_TRACE_PROBE)
1219 printk(" <- XU %d", entity->id);
1220
1221 if (entity->bNrInPins != 1) {
1222 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1223 "than 1 input pin.\n", entity->id);
1224 return -1;
1225 }
1226
1227 break;
1228
1229 case UVC_VC_PROCESSING_UNIT:
1230 if (uvc_trace_param & UVC_TRACE_PROBE)
1231 printk(" <- PU %d", entity->id);
1232
1233 if (chain->processing != NULL) {
1234 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1235 "Processing Units in chain.\n");
1236 return -1;
1237 }
1238
1239 chain->processing = entity;
1240 break;
1241
1242 case UVC_VC_SELECTOR_UNIT:
1243 if (uvc_trace_param & UVC_TRACE_PROBE)
1244 printk(" <- SU %d", entity->id);
1245
1246 /* Single-input selector units are ignored. */
1247 if (entity->bNrInPins == 1)
1248 break;
1249
1250 if (chain->selector != NULL) {
1251 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1252 "Units in chain.\n");
1253 return -1;
1254 }
1255
1256 chain->selector = entity;
1257 break;
1258
1259 case UVC_ITT_VENDOR_SPECIFIC:
1260 case UVC_ITT_CAMERA:
1261 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1262 if (uvc_trace_param & UVC_TRACE_PROBE)
1263 printk(" <- IT %d\n", entity->id);
1264
1265 break;
1266
1267 case UVC_OTT_VENDOR_SPECIFIC:
1268 case UVC_OTT_DISPLAY:
1269 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1270 if (uvc_trace_param & UVC_TRACE_PROBE)
1271 printk(" OT %d", entity->id);
1272
1273 break;
1274
1275 case UVC_TT_STREAMING:
1276 if (UVC_ENTITY_IS_ITERM(entity)) {
1277 if (uvc_trace_param & UVC_TRACE_PROBE)
1278 printk(" <- IT %d\n", entity->id);
1279 } else {
1280 if (uvc_trace_param & UVC_TRACE_PROBE)
1281 printk(" OT %d", entity->id);
1282 }
1283
1284 break;
1285
1286 default:
1287 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1288 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1289 return -1;
1290 }
1291
1292 list_add_tail(&entity->chain, &chain->entities);
1293 return 0;
1294 }
1295
1296 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1297 struct uvc_entity *entity, struct uvc_entity *prev)
1298 {
1299 struct uvc_entity *forward;
1300 int found;
1301
1302 /* Forward scan */
1303 forward = NULL;
1304 found = 0;
1305
1306 while (1) {
1307 forward = uvc_entity_by_reference(chain->dev, entity->id,
1308 forward);
1309 if (forward == NULL)
1310 break;
1311 if (forward == prev)
1312 continue;
1313
1314 switch (UVC_ENTITY_TYPE(forward)) {
1315 case UVC_VC_EXTENSION_UNIT:
1316 if (forward->bNrInPins != 1) {
1317 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1318 "has more than 1 input pin.\n",
1319 entity->id);
1320 return -EINVAL;
1321 }
1322
1323 list_add_tail(&forward->chain, &chain->entities);
1324 if (uvc_trace_param & UVC_TRACE_PROBE) {
1325 if (!found)
1326 printk(" (->");
1327
1328 printk(" XU %d", forward->id);
1329 found = 1;
1330 }
1331 break;
1332
1333 case UVC_OTT_VENDOR_SPECIFIC:
1334 case UVC_OTT_DISPLAY:
1335 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1336 case UVC_TT_STREAMING:
1337 if (UVC_ENTITY_IS_ITERM(forward)) {
1338 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1339 "terminal %u.\n", forward->id);
1340 return -EINVAL;
1341 }
1342
1343 list_add_tail(&forward->chain, &chain->entities);
1344 if (uvc_trace_param & UVC_TRACE_PROBE) {
1345 if (!found)
1346 printk(" (->");
1347
1348 printk(" OT %d", forward->id);
1349 found = 1;
1350 }
1351 break;
1352 }
1353 }
1354 if (found)
1355 printk(")");
1356
1357 return 0;
1358 }
1359
1360 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1361 struct uvc_entity **_entity)
1362 {
1363 struct uvc_entity *entity = *_entity;
1364 struct uvc_entity *term;
1365 int id = -EINVAL, i;
1366
1367 switch (UVC_ENTITY_TYPE(entity)) {
1368 case UVC_VC_EXTENSION_UNIT:
1369 case UVC_VC_PROCESSING_UNIT:
1370 id = entity->baSourceID[0];
1371 break;
1372
1373 case UVC_VC_SELECTOR_UNIT:
1374 /* Single-input selector units are ignored. */
1375 if (entity->bNrInPins == 1) {
1376 id = entity->baSourceID[0];
1377 break;
1378 }
1379
1380 if (uvc_trace_param & UVC_TRACE_PROBE)
1381 printk(" <- IT");
1382
1383 chain->selector = entity;
1384 for (i = 0; i < entity->bNrInPins; ++i) {
1385 id = entity->baSourceID[i];
1386 term = uvc_entity_by_id(chain->dev, id);
1387 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1388 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1389 "input %d isn't connected to an "
1390 "input terminal\n", entity->id, i);
1391 return -1;
1392 }
1393
1394 if (uvc_trace_param & UVC_TRACE_PROBE)
1395 printk(" %d", term->id);
1396
1397 list_add_tail(&term->chain, &chain->entities);
1398 uvc_scan_chain_forward(chain, term, entity);
1399 }
1400
1401 if (uvc_trace_param & UVC_TRACE_PROBE)
1402 printk("\n");
1403
1404 id = 0;
1405 break;
1406
1407 case UVC_ITT_VENDOR_SPECIFIC:
1408 case UVC_ITT_CAMERA:
1409 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1410 case UVC_OTT_VENDOR_SPECIFIC:
1411 case UVC_OTT_DISPLAY:
1412 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1413 case UVC_TT_STREAMING:
1414 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1415 break;
1416 }
1417
1418 if (id <= 0) {
1419 *_entity = NULL;
1420 return id;
1421 }
1422
1423 entity = uvc_entity_by_id(chain->dev, id);
1424 if (entity == NULL) {
1425 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1426 "unknown entity %d.\n", id);
1427 return -EINVAL;
1428 }
1429
1430 *_entity = entity;
1431 return 0;
1432 }
1433
1434 static int uvc_scan_chain(struct uvc_video_chain *chain,
1435 struct uvc_entity *term)
1436 {
1437 struct uvc_entity *entity, *prev;
1438
1439 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1440
1441 entity = term;
1442 prev = NULL;
1443
1444 while (entity != NULL) {
1445 /* Entity must not be part of an existing chain */
1446 if (entity->chain.next || entity->chain.prev) {
1447 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1448 "entity %d already in chain.\n", entity->id);
1449 return -EINVAL;
1450 }
1451
1452 /* Process entity */
1453 if (uvc_scan_chain_entity(chain, entity) < 0)
1454 return -EINVAL;
1455
1456 /* Forward scan */
1457 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1458 return -EINVAL;
1459
1460 /* Backward scan */
1461 prev = entity;
1462 if (uvc_scan_chain_backward(chain, &entity) < 0)
1463 return -EINVAL;
1464 }
1465
1466 return 0;
1467 }
1468
1469 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1470 char *buffer)
1471 {
1472 struct uvc_entity *term;
1473 unsigned int nterms = 0;
1474 char *p = buffer;
1475
1476 list_for_each_entry(term, terms, chain) {
1477 if (!UVC_ENTITY_IS_TERM(term) ||
1478 UVC_TERM_DIRECTION(term) != dir)
1479 continue;
1480
1481 if (nterms)
1482 p += sprintf(p, ",");
1483 if (++nterms >= 4) {
1484 p += sprintf(p, "...");
1485 break;
1486 }
1487 p += sprintf(p, "%u", term->id);
1488 }
1489
1490 return p - buffer;
1491 }
1492
1493 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1494 {
1495 static char buffer[43];
1496 char *p = buffer;
1497
1498 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1499 p += sprintf(p, " -> ");
1500 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1501
1502 return buffer;
1503 }
1504
1505 /*
1506 * Scan the device for video chains and register video devices.
1507 *
1508 * Chains are scanned starting at their output terminals and walked backwards.
1509 */
1510 static int uvc_scan_device(struct uvc_device *dev)
1511 {
1512 struct uvc_video_chain *chain;
1513 struct uvc_entity *term;
1514
1515 list_for_each_entry(term, &dev->entities, list) {
1516 if (!UVC_ENTITY_IS_OTERM(term))
1517 continue;
1518
1519 /* If the terminal is already included in a chain, skip it.
1520 * This can happen for chains that have multiple output
1521 * terminals, where all output terminals beside the first one
1522 * will be inserted in the chain in forward scans.
1523 */
1524 if (term->chain.next || term->chain.prev)
1525 continue;
1526
1527 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1528 if (chain == NULL)
1529 return -ENOMEM;
1530
1531 INIT_LIST_HEAD(&chain->entities);
1532 mutex_init(&chain->ctrl_mutex);
1533 chain->dev = dev;
1534
1535 if (uvc_scan_chain(chain, term) < 0) {
1536 kfree(chain);
1537 continue;
1538 }
1539
1540 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1541 uvc_print_chain(chain));
1542
1543 list_add_tail(&chain->list, &dev->chains);
1544 }
1545
1546 if (list_empty(&dev->chains)) {
1547 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1548 return -1;
1549 }
1550
1551 return 0;
1552 }
1553
1554 /* ------------------------------------------------------------------------
1555 * Video device registration and unregistration
1556 */
1557
1558 /*
1559 * Delete the UVC device.
1560 *
1561 * Called by the kernel when the last reference to the uvc_device structure
1562 * is released.
1563 *
1564 * As this function is called after or during disconnect(), all URBs have
1565 * already been canceled by the USB core. There is no need to kill the
1566 * interrupt URB manually.
1567 */
1568 static void uvc_delete(struct uvc_device *dev)
1569 {
1570 struct list_head *p, *n;
1571
1572 usb_put_intf(dev->intf);
1573 usb_put_dev(dev->udev);
1574
1575 uvc_status_cleanup(dev);
1576 uvc_ctrl_cleanup_device(dev);
1577
1578 list_for_each_safe(p, n, &dev->chains) {
1579 struct uvc_video_chain *chain;
1580 chain = list_entry(p, struct uvc_video_chain, list);
1581 kfree(chain);
1582 }
1583
1584 list_for_each_safe(p, n, &dev->entities) {
1585 struct uvc_entity *entity;
1586 entity = list_entry(p, struct uvc_entity, list);
1587 kfree(entity);
1588 }
1589
1590 list_for_each_safe(p, n, &dev->streams) {
1591 struct uvc_streaming *streaming;
1592 streaming = list_entry(p, struct uvc_streaming, list);
1593 usb_driver_release_interface(&uvc_driver.driver,
1594 streaming->intf);
1595 usb_put_intf(streaming->intf);
1596 kfree(streaming->format);
1597 kfree(streaming->header.bmaControls);
1598 kfree(streaming);
1599 }
1600
1601 kfree(dev);
1602 }
1603
1604 static void uvc_release(struct video_device *vdev)
1605 {
1606 struct uvc_streaming *stream = video_get_drvdata(vdev);
1607 struct uvc_device *dev = stream->dev;
1608
1609 video_device_release(vdev);
1610
1611 /* Decrement the registered streams count and delete the device when it
1612 * reaches zero.
1613 */
1614 if (atomic_dec_and_test(&dev->nstreams))
1615 uvc_delete(dev);
1616 }
1617
1618 /*
1619 * Unregister the video devices.
1620 */
1621 static void uvc_unregister_video(struct uvc_device *dev)
1622 {
1623 struct uvc_streaming *stream;
1624
1625 /* Unregistering all video devices might result in uvc_delete() being
1626 * called from inside the loop if there's no open file handle. To avoid
1627 * that, increment the stream count before iterating over the streams
1628 * and decrement it when done.
1629 */
1630 atomic_inc(&dev->nstreams);
1631
1632 list_for_each_entry(stream, &dev->streams, list) {
1633 if (stream->vdev == NULL)
1634 continue;
1635
1636 video_unregister_device(stream->vdev);
1637 stream->vdev = NULL;
1638 }
1639
1640 /* Decrement the stream count and call uvc_delete explicitly if there
1641 * are no stream left.
1642 */
1643 if (atomic_dec_and_test(&dev->nstreams))
1644 uvc_delete(dev);
1645 }
1646
1647 static int uvc_register_video(struct uvc_device *dev,
1648 struct uvc_streaming *stream)
1649 {
1650 struct video_device *vdev;
1651 int ret;
1652
1653 /* Initialize the streaming interface with default streaming
1654 * parameters.
1655 */
1656 ret = uvc_video_init(stream);
1657 if (ret < 0) {
1658 uvc_printk(KERN_ERR, "Failed to initialize the device "
1659 "(%d).\n", ret);
1660 return ret;
1661 }
1662
1663 /* Register the device with V4L. */
1664 vdev = video_device_alloc();
1665 if (vdev == NULL) {
1666 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n",
1667 ret);
1668 return -ENOMEM;
1669 }
1670
1671 /* We already hold a reference to dev->udev. The video device will be
1672 * unregistered before the reference is released, so we don't need to
1673 * get another one.
1674 */
1675 vdev->parent = &dev->intf->dev;
1676 vdev->fops = &uvc_fops;
1677 vdev->release = uvc_release;
1678 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1679
1680 /* Set the driver data before calling video_register_device, otherwise
1681 * uvc_v4l2_open might race us.
1682 */
1683 stream->vdev = vdev;
1684 video_set_drvdata(vdev, stream);
1685
1686 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1687 if (ret < 0) {
1688 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
1689 ret);
1690 stream->vdev = NULL;
1691 video_device_release(vdev);
1692 return ret;
1693 }
1694
1695 atomic_inc(&dev->nstreams);
1696 return 0;
1697 }
1698
1699 /*
1700 * Register all video devices in all chains.
1701 */
1702 static int uvc_register_terms(struct uvc_device *dev,
1703 struct uvc_video_chain *chain)
1704 {
1705 struct uvc_streaming *stream;
1706 struct uvc_entity *term;
1707 int ret;
1708
1709 list_for_each_entry(term, &chain->entities, chain) {
1710 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1711 continue;
1712
1713 stream = uvc_stream_by_id(dev, term->id);
1714 if (stream == NULL) {
1715 uvc_printk(KERN_INFO, "No streaming interface found "
1716 "for terminal %u.", term->id);
1717 continue;
1718 }
1719
1720 stream->chain = chain;
1721 ret = uvc_register_video(dev, stream);
1722 if (ret < 0)
1723 return ret;
1724 }
1725
1726 return 0;
1727 }
1728
1729 static int uvc_register_chains(struct uvc_device *dev)
1730 {
1731 struct uvc_video_chain *chain;
1732 int ret;
1733
1734 list_for_each_entry(chain, &dev->chains, list) {
1735 ret = uvc_register_terms(dev, chain);
1736 if (ret < 0)
1737 return ret;
1738 }
1739
1740 return 0;
1741 }
1742
1743 /* ------------------------------------------------------------------------
1744 * USB probe, disconnect, suspend and resume
1745 */
1746
1747 static int uvc_probe(struct usb_interface *intf,
1748 const struct usb_device_id *id)
1749 {
1750 struct usb_device *udev = interface_to_usbdev(intf);
1751 struct uvc_device *dev;
1752 int ret;
1753
1754 if (id->idVendor && id->idProduct)
1755 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1756 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1757 id->idProduct);
1758 else
1759 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1760 udev->devpath);
1761
1762 /* Allocate memory for the device and initialize it. */
1763 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1764 return -ENOMEM;
1765
1766 INIT_LIST_HEAD(&dev->entities);
1767 INIT_LIST_HEAD(&dev->chains);
1768 INIT_LIST_HEAD(&dev->streams);
1769 atomic_set(&dev->nstreams, 0);
1770 atomic_set(&dev->users, 0);
1771 atomic_set(&dev->nmappings, 0);
1772
1773 dev->udev = usb_get_dev(udev);
1774 dev->intf = usb_get_intf(intf);
1775 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1776 dev->quirks = (uvc_quirks_param == -1)
1777 ? id->driver_info : uvc_quirks_param;
1778
1779 if (udev->product != NULL)
1780 strlcpy(dev->name, udev->product, sizeof dev->name);
1781 else
1782 snprintf(dev->name, sizeof dev->name,
1783 "UVC Camera (%04x:%04x)",
1784 le16_to_cpu(udev->descriptor.idVendor),
1785 le16_to_cpu(udev->descriptor.idProduct));
1786
1787 /* Parse the Video Class control descriptor. */
1788 if (uvc_parse_control(dev) < 0) {
1789 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1790 "descriptors.\n");
1791 goto error;
1792 }
1793
1794 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1795 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1796 udev->product ? udev->product : "<unnamed>",
1797 le16_to_cpu(udev->descriptor.idVendor),
1798 le16_to_cpu(udev->descriptor.idProduct));
1799
1800 if (dev->quirks != id->driver_info) {
1801 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
1802 "parameter for testing purpose.\n", dev->quirks);
1803 uvc_printk(KERN_INFO, "Please report required quirks to the "
1804 "linux-uvc-devel mailing list.\n");
1805 }
1806
1807 /* Initialize controls. */
1808 if (uvc_ctrl_init_device(dev) < 0)
1809 goto error;
1810
1811 /* Scan the device for video chains. */
1812 if (uvc_scan_device(dev) < 0)
1813 goto error;
1814
1815 /* Register video devices. */
1816 if (uvc_register_chains(dev) < 0)
1817 goto error;
1818
1819 /* Save our data pointer in the interface data. */
1820 usb_set_intfdata(intf, dev);
1821
1822 /* Initialize the interrupt URB. */
1823 if ((ret = uvc_status_init(dev)) < 0) {
1824 uvc_printk(KERN_INFO, "Unable to initialize the status "
1825 "endpoint (%d), status interrupt will not be "
1826 "supported.\n", ret);
1827 }
1828
1829 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1830 usb_enable_autosuspend(udev);
1831 return 0;
1832
1833 error:
1834 uvc_unregister_video(dev);
1835 return -ENODEV;
1836 }
1837
1838 static void uvc_disconnect(struct usb_interface *intf)
1839 {
1840 struct uvc_device *dev = usb_get_intfdata(intf);
1841
1842 /* Set the USB interface data to NULL. This can be done outside the
1843 * lock, as there's no other reader.
1844 */
1845 usb_set_intfdata(intf, NULL);
1846
1847 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1848 UVC_SC_VIDEOSTREAMING)
1849 return;
1850
1851 dev->state |= UVC_DEV_DISCONNECTED;
1852
1853 uvc_unregister_video(dev);
1854 }
1855
1856 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1857 {
1858 struct uvc_device *dev = usb_get_intfdata(intf);
1859 struct uvc_streaming *stream;
1860
1861 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1862 intf->cur_altsetting->desc.bInterfaceNumber);
1863
1864 /* Controls are cached on the fly so they don't need to be saved. */
1865 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1866 UVC_SC_VIDEOCONTROL)
1867 return uvc_status_suspend(dev);
1868
1869 list_for_each_entry(stream, &dev->streams, list) {
1870 if (stream->intf == intf)
1871 return uvc_video_suspend(stream);
1872 }
1873
1874 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
1875 "mismatch.\n");
1876 return -EINVAL;
1877 }
1878
1879 static int __uvc_resume(struct usb_interface *intf, int reset)
1880 {
1881 struct uvc_device *dev = usb_get_intfdata(intf);
1882 struct uvc_streaming *stream;
1883
1884 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1885 intf->cur_altsetting->desc.bInterfaceNumber);
1886
1887 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1888 UVC_SC_VIDEOCONTROL) {
1889 if (reset) {
1890 int ret = uvc_ctrl_resume_device(dev);
1891
1892 if (ret < 0)
1893 return ret;
1894 }
1895
1896 return uvc_status_resume(dev);
1897 }
1898
1899 list_for_each_entry(stream, &dev->streams, list) {
1900 if (stream->intf == intf)
1901 return uvc_video_resume(stream);
1902 }
1903
1904 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
1905 "mismatch.\n");
1906 return -EINVAL;
1907 }
1908
1909 static int uvc_resume(struct usb_interface *intf)
1910 {
1911 return __uvc_resume(intf, 0);
1912 }
1913
1914 static int uvc_reset_resume(struct usb_interface *intf)
1915 {
1916 return __uvc_resume(intf, 1);
1917 }
1918
1919 /* ------------------------------------------------------------------------
1920 * Module parameters
1921 */
1922
1923 static int uvc_clock_param_get(char *buffer, struct kernel_param *kp)
1924 {
1925 if (uvc_clock_param == CLOCK_MONOTONIC)
1926 return sprintf(buffer, "CLOCK_MONOTONIC");
1927 else
1928 return sprintf(buffer, "CLOCK_REALTIME");
1929 }
1930
1931 static int uvc_clock_param_set(const char *val, struct kernel_param *kp)
1932 {
1933 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
1934 val += strlen("clock_");
1935
1936 if (strcasecmp(val, "monotonic") == 0)
1937 uvc_clock_param = CLOCK_MONOTONIC;
1938 else if (strcasecmp(val, "realtime") == 0)
1939 uvc_clock_param = CLOCK_REALTIME;
1940 else
1941 return -EINVAL;
1942
1943 return 0;
1944 }
1945
1946 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
1947 &uvc_clock_param, S_IRUGO|S_IWUSR);
1948 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
1949 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
1950 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
1951 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
1952 MODULE_PARM_DESC(quirks, "Forced device quirks");
1953 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
1954 MODULE_PARM_DESC(trace, "Trace level bitmask");
1955 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
1956 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
1957
1958 /* ------------------------------------------------------------------------
1959 * Driver initialization and cleanup
1960 */
1961
1962 /*
1963 * The Logitech cameras listed below have their interface class set to
1964 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1965 * though they are compliant.
1966 */
1967 static struct usb_device_id uvc_ids[] = {
1968 /* Genius eFace 2025 */
1969 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1970 | USB_DEVICE_ID_MATCH_INT_INFO,
1971 .idVendor = 0x0458,
1972 .idProduct = 0x706e,
1973 .bInterfaceClass = USB_CLASS_VIDEO,
1974 .bInterfaceSubClass = 1,
1975 .bInterfaceProtocol = 0,
1976 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1977 /* Microsoft Lifecam NX-6000 */
1978 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1979 | USB_DEVICE_ID_MATCH_INT_INFO,
1980 .idVendor = 0x045e,
1981 .idProduct = 0x00f8,
1982 .bInterfaceClass = USB_CLASS_VIDEO,
1983 .bInterfaceSubClass = 1,
1984 .bInterfaceProtocol = 0,
1985 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1986 /* Microsoft Lifecam VX-7000 */
1987 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1988 | USB_DEVICE_ID_MATCH_INT_INFO,
1989 .idVendor = 0x045e,
1990 .idProduct = 0x0723,
1991 .bInterfaceClass = USB_CLASS_VIDEO,
1992 .bInterfaceSubClass = 1,
1993 .bInterfaceProtocol = 0,
1994 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1995 /* Logitech Quickcam Fusion */
1996 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1997 | USB_DEVICE_ID_MATCH_INT_INFO,
1998 .idVendor = 0x046d,
1999 .idProduct = 0x08c1,
2000 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2001 .bInterfaceSubClass = 1,
2002 .bInterfaceProtocol = 0 },
2003 /* Logitech Quickcam Orbit MP */
2004 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2005 | USB_DEVICE_ID_MATCH_INT_INFO,
2006 .idVendor = 0x046d,
2007 .idProduct = 0x08c2,
2008 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2009 .bInterfaceSubClass = 1,
2010 .bInterfaceProtocol = 0 },
2011 /* Logitech Quickcam Pro for Notebook */
2012 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2013 | USB_DEVICE_ID_MATCH_INT_INFO,
2014 .idVendor = 0x046d,
2015 .idProduct = 0x08c3,
2016 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2017 .bInterfaceSubClass = 1,
2018 .bInterfaceProtocol = 0 },
2019 /* Logitech Quickcam Pro 5000 */
2020 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2021 | USB_DEVICE_ID_MATCH_INT_INFO,
2022 .idVendor = 0x046d,
2023 .idProduct = 0x08c5,
2024 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2025 .bInterfaceSubClass = 1,
2026 .bInterfaceProtocol = 0 },
2027 /* Logitech Quickcam OEM Dell Notebook */
2028 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2029 | USB_DEVICE_ID_MATCH_INT_INFO,
2030 .idVendor = 0x046d,
2031 .idProduct = 0x08c6,
2032 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2033 .bInterfaceSubClass = 1,
2034 .bInterfaceProtocol = 0 },
2035 /* Logitech Quickcam OEM Cisco VT Camera II */
2036 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2037 | USB_DEVICE_ID_MATCH_INT_INFO,
2038 .idVendor = 0x046d,
2039 .idProduct = 0x08c7,
2040 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2041 .bInterfaceSubClass = 1,
2042 .bInterfaceProtocol = 0 },
2043 /* Chicony CNF7129 (Asus EEE 100HE) */
2044 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2045 | USB_DEVICE_ID_MATCH_INT_INFO,
2046 .idVendor = 0x04f2,
2047 .idProduct = 0xb071,
2048 .bInterfaceClass = USB_CLASS_VIDEO,
2049 .bInterfaceSubClass = 1,
2050 .bInterfaceProtocol = 0,
2051 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE },
2052 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2053 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2054 | USB_DEVICE_ID_MATCH_INT_INFO,
2055 .idVendor = 0x058f,
2056 .idProduct = 0x3820,
2057 .bInterfaceClass = USB_CLASS_VIDEO,
2058 .bInterfaceSubClass = 1,
2059 .bInterfaceProtocol = 0,
2060 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2061 /* Apple Built-In iSight */
2062 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2063 | USB_DEVICE_ID_MATCH_INT_INFO,
2064 .idVendor = 0x05ac,
2065 .idProduct = 0x8501,
2066 .bInterfaceClass = USB_CLASS_VIDEO,
2067 .bInterfaceSubClass = 1,
2068 .bInterfaceProtocol = 0,
2069 .driver_info = UVC_QUIRK_PROBE_MINMAX
2070 | UVC_QUIRK_BUILTIN_ISIGHT },
2071 /* Genesys Logic USB 2.0 PC Camera */
2072 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2073 | USB_DEVICE_ID_MATCH_INT_INFO,
2074 .idVendor = 0x05e3,
2075 .idProduct = 0x0505,
2076 .bInterfaceClass = USB_CLASS_VIDEO,
2077 .bInterfaceSubClass = 1,
2078 .bInterfaceProtocol = 0,
2079 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2080 /* ViMicro Vega */
2081 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2082 | USB_DEVICE_ID_MATCH_INT_INFO,
2083 .idVendor = 0x0ac8,
2084 .idProduct = 0x332d,
2085 .bInterfaceClass = USB_CLASS_VIDEO,
2086 .bInterfaceSubClass = 1,
2087 .bInterfaceProtocol = 0,
2088 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2089 /* ViMicro - Minoru3D */
2090 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2091 | USB_DEVICE_ID_MATCH_INT_INFO,
2092 .idVendor = 0x0ac8,
2093 .idProduct = 0x3410,
2094 .bInterfaceClass = USB_CLASS_VIDEO,
2095 .bInterfaceSubClass = 1,
2096 .bInterfaceProtocol = 0,
2097 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2098 /* ViMicro Venus - Minoru3D */
2099 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2100 | USB_DEVICE_ID_MATCH_INT_INFO,
2101 .idVendor = 0x0ac8,
2102 .idProduct = 0x3420,
2103 .bInterfaceClass = USB_CLASS_VIDEO,
2104 .bInterfaceSubClass = 1,
2105 .bInterfaceProtocol = 0,
2106 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2107 /* MT6227 */
2108 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2109 | USB_DEVICE_ID_MATCH_INT_INFO,
2110 .idVendor = 0x0e8d,
2111 .idProduct = 0x0004,
2112 .bInterfaceClass = USB_CLASS_VIDEO,
2113 .bInterfaceSubClass = 1,
2114 .bInterfaceProtocol = 0,
2115 .driver_info = UVC_QUIRK_PROBE_MINMAX
2116 | UVC_QUIRK_PROBE_DEF },
2117 /* IMC Networks (Medion Akoya) */
2118 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2119 | USB_DEVICE_ID_MATCH_INT_INFO,
2120 .idVendor = 0x13d3,
2121 .idProduct = 0x5103,
2122 .bInterfaceClass = USB_CLASS_VIDEO,
2123 .bInterfaceSubClass = 1,
2124 .bInterfaceProtocol = 0,
2125 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2126 /* Syntek (HP Spartan) */
2127 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2128 | USB_DEVICE_ID_MATCH_INT_INFO,
2129 .idVendor = 0x174f,
2130 .idProduct = 0x5212,
2131 .bInterfaceClass = USB_CLASS_VIDEO,
2132 .bInterfaceSubClass = 1,
2133 .bInterfaceProtocol = 0,
2134 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2135 /* Syntek (Samsung Q310) */
2136 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2137 | USB_DEVICE_ID_MATCH_INT_INFO,
2138 .idVendor = 0x174f,
2139 .idProduct = 0x5931,
2140 .bInterfaceClass = USB_CLASS_VIDEO,
2141 .bInterfaceSubClass = 1,
2142 .bInterfaceProtocol = 0,
2143 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2144 /* Syntek (Packard Bell EasyNote MX52 */
2145 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2146 | USB_DEVICE_ID_MATCH_INT_INFO,
2147 .idVendor = 0x174f,
2148 .idProduct = 0x8a12,
2149 .bInterfaceClass = USB_CLASS_VIDEO,
2150 .bInterfaceSubClass = 1,
2151 .bInterfaceProtocol = 0,
2152 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2153 /* Syntek (Asus F9SG) */
2154 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2155 | USB_DEVICE_ID_MATCH_INT_INFO,
2156 .idVendor = 0x174f,
2157 .idProduct = 0x8a31,
2158 .bInterfaceClass = USB_CLASS_VIDEO,
2159 .bInterfaceSubClass = 1,
2160 .bInterfaceProtocol = 0,
2161 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2162 /* Syntek (Asus U3S) */
2163 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2164 | USB_DEVICE_ID_MATCH_INT_INFO,
2165 .idVendor = 0x174f,
2166 .idProduct = 0x8a33,
2167 .bInterfaceClass = USB_CLASS_VIDEO,
2168 .bInterfaceSubClass = 1,
2169 .bInterfaceProtocol = 0,
2170 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2171 /* Syntek (JAOtech Smart Terminal) */
2172 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2173 | USB_DEVICE_ID_MATCH_INT_INFO,
2174 .idVendor = 0x174f,
2175 .idProduct = 0x8a34,
2176 .bInterfaceClass = USB_CLASS_VIDEO,
2177 .bInterfaceSubClass = 1,
2178 .bInterfaceProtocol = 0,
2179 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2180 /* Miricle 307K */
2181 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2182 | USB_DEVICE_ID_MATCH_INT_INFO,
2183 .idVendor = 0x17dc,
2184 .idProduct = 0x0202,
2185 .bInterfaceClass = USB_CLASS_VIDEO,
2186 .bInterfaceSubClass = 1,
2187 .bInterfaceProtocol = 0,
2188 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2189 /* Lenovo Thinkpad SL400/SL500 */
2190 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2191 | USB_DEVICE_ID_MATCH_INT_INFO,
2192 .idVendor = 0x17ef,
2193 .idProduct = 0x480b,
2194 .bInterfaceClass = USB_CLASS_VIDEO,
2195 .bInterfaceSubClass = 1,
2196 .bInterfaceProtocol = 0,
2197 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2198 /* Aveo Technology USB 2.0 Camera */
2199 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2200 | USB_DEVICE_ID_MATCH_INT_INFO,
2201 .idVendor = 0x1871,
2202 .idProduct = 0x0306,
2203 .bInterfaceClass = USB_CLASS_VIDEO,
2204 .bInterfaceSubClass = 1,
2205 .bInterfaceProtocol = 0,
2206 .driver_info = UVC_QUIRK_PROBE_MINMAX
2207 | UVC_QUIRK_PROBE_EXTRAFIELDS },
2208 /* Ecamm Pico iMage */
2209 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2210 | USB_DEVICE_ID_MATCH_INT_INFO,
2211 .idVendor = 0x18cd,
2212 .idProduct = 0xcafe,
2213 .bInterfaceClass = USB_CLASS_VIDEO,
2214 .bInterfaceSubClass = 1,
2215 .bInterfaceProtocol = 0,
2216 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
2217 /* Manta MM-353 Plako */
2218 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2219 | USB_DEVICE_ID_MATCH_INT_INFO,
2220 .idVendor = 0x18ec,
2221 .idProduct = 0x3188,
2222 .bInterfaceClass = USB_CLASS_VIDEO,
2223 .bInterfaceSubClass = 1,
2224 .bInterfaceProtocol = 0,
2225 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2226 /* FSC WebCam V30S */
2227 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2228 | USB_DEVICE_ID_MATCH_INT_INFO,
2229 .idVendor = 0x18ec,
2230 .idProduct = 0x3288,
2231 .bInterfaceClass = USB_CLASS_VIDEO,
2232 .bInterfaceSubClass = 1,
2233 .bInterfaceProtocol = 0,
2234 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2235 /* Arkmicro unbranded */
2236 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2237 | USB_DEVICE_ID_MATCH_INT_INFO,
2238 .idVendor = 0x18ec,
2239 .idProduct = 0x3290,
2240 .bInterfaceClass = USB_CLASS_VIDEO,
2241 .bInterfaceSubClass = 1,
2242 .bInterfaceProtocol = 0,
2243 .driver_info = UVC_QUIRK_PROBE_DEF },
2244 /* Bodelin ProScopeHR */
2245 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2246 | USB_DEVICE_ID_MATCH_DEV_HI
2247 | USB_DEVICE_ID_MATCH_INT_INFO,
2248 .idVendor = 0x19ab,
2249 .idProduct = 0x1000,
2250 .bcdDevice_hi = 0x0126,
2251 .bInterfaceClass = USB_CLASS_VIDEO,
2252 .bInterfaceSubClass = 1,
2253 .bInterfaceProtocol = 0,
2254 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
2255 /* MSI StarCam 370i */
2256 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2257 | USB_DEVICE_ID_MATCH_INT_INFO,
2258 .idVendor = 0x1b3b,
2259 .idProduct = 0x2951,
2260 .bInterfaceClass = USB_CLASS_VIDEO,
2261 .bInterfaceSubClass = 1,
2262 .bInterfaceProtocol = 0,
2263 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2264 /* SiGma Micro USB Web Camera */
2265 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2266 | USB_DEVICE_ID_MATCH_INT_INFO,
2267 .idVendor = 0x1c4f,
2268 .idProduct = 0x3000,
2269 .bInterfaceClass = USB_CLASS_VIDEO,
2270 .bInterfaceSubClass = 1,
2271 .bInterfaceProtocol = 0,
2272 .driver_info = UVC_QUIRK_PROBE_MINMAX
2273 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
2274 /* Generic USB Video Class */
2275 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
2276 {}
2277 };
2278
2279 MODULE_DEVICE_TABLE(usb, uvc_ids);
2280
2281 struct uvc_driver uvc_driver = {
2282 .driver = {
2283 .name = "uvcvideo",
2284 .probe = uvc_probe,
2285 .disconnect = uvc_disconnect,
2286 .suspend = uvc_suspend,
2287 .resume = uvc_resume,
2288 .reset_resume = uvc_reset_resume,
2289 .id_table = uvc_ids,
2290 .supports_autosuspend = 1,
2291 },
2292 };
2293
2294 static int __init uvc_init(void)
2295 {
2296 int result;
2297
2298 result = usb_register(&uvc_driver.driver);
2299 if (result == 0)
2300 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2301 return result;
2302 }
2303
2304 static void __exit uvc_cleanup(void)
2305 {
2306 usb_deregister(&uvc_driver.driver);
2307 }
2308
2309 module_init(uvc_init);
2310 module_exit(uvc_cleanup);
2311
2312 MODULE_AUTHOR(DRIVER_AUTHOR);
2313 MODULE_DESCRIPTION(DRIVER_DESC);
2314 MODULE_LICENSE("GPL");
2315 MODULE_VERSION(DRIVER_VERSION);
2316