1 /*
2 * uvc_driver.c -- USB Video Class driver
3 *
4 * Copyright (C) 2005-2009
5 * Laurent Pinchart (laurent.pinchart@skynet.be)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 */
13
14 /*
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/usb.h>
30 #include <linux/videodev2.h>
31 #include <linux/vmalloc.h>
32 #include <linux/wait.h>
33 #include <asm/atomic.h>
34 #include <asm/unaligned.h>
35
36 #include <media/v4l2-common.h>
37
38 #include "uvcvideo.h"
39
40 #define DRIVER_AUTHOR "Laurent Pinchart <laurent.pinchart@skynet.be>"
41 #define DRIVER_DESC "USB Video Class driver"
42 #ifndef DRIVER_VERSION
43 #define DRIVER_VERSION "v0.1.0"
44 #endif
45
46 unsigned int uvc_no_drop_param;
47 static unsigned int uvc_quirks_param;
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 4:2:0 (NV12)",
63 .guid = UVC_GUID_FORMAT_NV12,
64 .fcc = V4L2_PIX_FMT_NV12,
65 },
66 {
67 .name = "MJPEG",
68 .guid = UVC_GUID_FORMAT_MJPEG,
69 .fcc = V4L2_PIX_FMT_MJPEG,
70 },
71 {
72 .name = "YVU 4:2:0 (YV12)",
73 .guid = UVC_GUID_FORMAT_YV12,
74 .fcc = V4L2_PIX_FMT_YVU420,
75 },
76 {
77 .name = "YUV 4:2:0 (I420)",
78 .guid = UVC_GUID_FORMAT_I420,
79 .fcc = V4L2_PIX_FMT_YUV420,
80 },
81 {
82 .name = "YUV 4:2:2 (UYVY)",
83 .guid = UVC_GUID_FORMAT_UYVY,
84 .fcc = V4L2_PIX_FMT_UYVY,
85 },
86 {
87 .name = "Greyscale",
88 .guid = UVC_GUID_FORMAT_Y800,
89 .fcc = V4L2_PIX_FMT_GREY,
90 },
91 {
92 .name = "RGB Bayer",
93 .guid = UVC_GUID_FORMAT_BY8,
94 .fcc = V4L2_PIX_FMT_SBGGR8,
95 },
96 };
97
98 /* ------------------------------------------------------------------------
99 * Utility functions
100 */
101
102 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
103 __u8 epaddr)
104 {
105 struct usb_host_endpoint *ep;
106 unsigned int i;
107
108 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
109 ep = &alts->endpoint[i];
110 if (ep->desc.bEndpointAddress == epaddr)
111 return ep;
112 }
113
114 return NULL;
115 }
116
117 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
118 {
119 unsigned int len = ARRAY_SIZE(uvc_fmts);
120 unsigned int i;
121
122 for (i = 0; i < len; ++i) {
123 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
124 return &uvc_fmts[i];
125 }
126
127 return NULL;
128 }
129
130 static __u32 uvc_colorspace(const __u8 primaries)
131 {
132 static const __u8 colorprimaries[] = {
133 0,
134 V4L2_COLORSPACE_SRGB,
135 V4L2_COLORSPACE_470_SYSTEM_M,
136 V4L2_COLORSPACE_470_SYSTEM_BG,
137 V4L2_COLORSPACE_SMPTE170M,
138 V4L2_COLORSPACE_SMPTE240M,
139 };
140
141 if (primaries < ARRAY_SIZE(colorprimaries))
142 return colorprimaries[primaries];
143
144 return 0;
145 }
146
147 /* Simplify a fraction using a simple continued fraction decomposition. The
148 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
149 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
150 * arbitrary parameters to remove non-significative terms from the simple
151 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
152 * respectively seems to give nice results.
153 */
154 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
155 unsigned int n_terms, unsigned int threshold)
156 {
157 uint32_t *an;
158 uint32_t x, y, r;
159 unsigned int i, n;
160
161 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
162 if (an == NULL)
163 return;
164
165 /* Convert the fraction to a simple continued fraction. See
166 * http://mathforum.org/dr.math/faq/faq.fractions.html
167 * Stop if the current term is bigger than or equal to the given
168 * threshold.
169 */
170 x = *numerator;
171 y = *denominator;
172
173 for (n = 0; n < n_terms && y != 0; ++n) {
174 an[n] = x / y;
175 if (an[n] >= threshold) {
176 if (n < 2)
177 n++;
178 break;
179 }
180
181 r = x - an[n] * y;
182 x = y;
183 y = r;
184 }
185
186 /* Expand the simple continued fraction back to an integer fraction. */
187 x = 0;
188 y = 1;
189
190 for (i = n; i > 0; --i) {
191 r = y;
192 y = an[i-1] * y + x;
193 x = r;
194 }
195
196 *numerator = y;
197 *denominator = x;
198 kfree(an);
199 }
200
201 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
202 * to compute numerator / denominator * 10000000 using 32 bit fixed point
203 * arithmetic only.
204 */
205 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
206 {
207 uint32_t multiplier;
208
209 /* Saturate the result if the operation would overflow. */
210 if (denominator == 0 ||
211 numerator/denominator >= ((uint32_t)-1)/10000000)
212 return (uint32_t)-1;
213
214 /* Divide both the denominator and the multiplier by two until
215 * numerator * multiplier doesn't overflow. If anyone knows a better
216 * algorithm please let me know.
217 */
218 multiplier = 10000000;
219 while (numerator > ((uint32_t)-1)/multiplier) {
220 multiplier /= 2;
221 denominator /= 2;
222 }
223
224 return denominator ? numerator * multiplier / denominator : 0;
225 }
226
227 /* ------------------------------------------------------------------------
228 * Terminal and unit management
229 */
230
231 static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
232 {
233 struct uvc_entity *entity;
234
235 list_for_each_entry(entity, &dev->entities, list) {
236 if (entity->id == id)
237 return entity;
238 }
239
240 return NULL;
241 }
242
243 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
244 int id, struct uvc_entity *entity)
245 {
246 unsigned int i;
247
248 if (entity == NULL)
249 entity = list_entry(&dev->entities, struct uvc_entity, list);
250
251 list_for_each_entry_continue(entity, &dev->entities, list) {
252 switch (UVC_ENTITY_TYPE(entity)) {
253 case TT_STREAMING:
254 if (entity->output.bSourceID == id)
255 return entity;
256 break;
257
258 case VC_PROCESSING_UNIT:
259 if (entity->processing.bSourceID == id)
260 return entity;
261 break;
262
263 case VC_SELECTOR_UNIT:
264 for (i = 0; i < entity->selector.bNrInPins; ++i)
265 if (entity->selector.baSourceID[i] == id)
266 return entity;
267 break;
268
269 case VC_EXTENSION_UNIT:
270 for (i = 0; i < entity->extension.bNrInPins; ++i)
271 if (entity->extension.baSourceID[i] == id)
272 return entity;
273 break;
274 }
275 }
276
277 return NULL;
278 }
279
280 /* ------------------------------------------------------------------------
281 * Descriptors handling
282 */
283
284 static int uvc_parse_format(struct uvc_device *dev,
285 struct uvc_streaming *streaming, struct uvc_format *format,
286 __u32 **intervals, unsigned char *buffer, int buflen)
287 {
288 struct usb_interface *intf = streaming->intf;
289 struct usb_host_interface *alts = intf->cur_altsetting;
290 struct uvc_format_desc *fmtdesc;
291 struct uvc_frame *frame;
292 const unsigned char *start = buffer;
293 unsigned int interval;
294 unsigned int i, n;
295 __u8 ftype;
296
297 format->type = buffer[2];
298 format->index = buffer[3];
299
300 switch (buffer[2]) {
301 case VS_FORMAT_UNCOMPRESSED:
302 case VS_FORMAT_FRAME_BASED:
303 n = buffer[2] == VS_FORMAT_UNCOMPRESSED ? 27 : 28;
304 if (buflen < n) {
305 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
306 "interface %d FORMAT error\n",
307 dev->udev->devnum,
308 alts->desc.bInterfaceNumber);
309 return -EINVAL;
310 }
311
312 /* Find the format descriptor from its GUID. */
313 fmtdesc = uvc_format_by_guid(&buffer[5]);
314
315 if (fmtdesc != NULL) {
316 strlcpy(format->name, fmtdesc->name,
317 sizeof format->name);
318 format->fcc = fmtdesc->fcc;
319 } else {
320 uvc_printk(KERN_INFO, "Unknown video format "
321 UVC_GUID_FORMAT "\n",
322 UVC_GUID_ARGS(&buffer[5]));
323 snprintf(format->name, sizeof format->name,
324 UVC_GUID_FORMAT, UVC_GUID_ARGS(&buffer[5]));
325 format->fcc = 0;
326 }
327
328 format->bpp = buffer[21];
329 if (buffer[2] == VS_FORMAT_UNCOMPRESSED) {
330 ftype = VS_FRAME_UNCOMPRESSED;
331 } else {
332 ftype = VS_FRAME_FRAME_BASED;
333 if (buffer[27])
334 format->flags = UVC_FMT_FLAG_COMPRESSED;
335 }
336 break;
337
338 case VS_FORMAT_MJPEG:
339 if (buflen < 11) {
340 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
341 "interface %d FORMAT error\n",
342 dev->udev->devnum,
343 alts->desc.bInterfaceNumber);
344 return -EINVAL;
345 }
346
347 strlcpy(format->name, "MJPEG", sizeof format->name);
348 format->fcc = V4L2_PIX_FMT_MJPEG;
349 format->flags = UVC_FMT_FLAG_COMPRESSED;
350 format->bpp = 0;
351 ftype = VS_FRAME_MJPEG;
352 break;
353
354 case VS_FORMAT_DV:
355 if (buflen < 9) {
356 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
357 "interface %d FORMAT error\n",
358 dev->udev->devnum,
359 alts->desc.bInterfaceNumber);
360 return -EINVAL;
361 }
362
363 switch (buffer[8] & 0x7f) {
364 case 0:
365 strlcpy(format->name, "SD-DV", sizeof format->name);
366 break;
367 case 1:
368 strlcpy(format->name, "SDL-DV", sizeof format->name);
369 break;
370 case 2:
371 strlcpy(format->name, "HD-DV", sizeof format->name);
372 break;
373 default:
374 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
375 "interface %d: unknown DV format %u\n",
376 dev->udev->devnum,
377 alts->desc.bInterfaceNumber, buffer[8]);
378 return -EINVAL;
379 }
380
381 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
382 sizeof format->name);
383
384 format->fcc = V4L2_PIX_FMT_DV;
385 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
386 format->bpp = 0;
387 ftype = 0;
388
389 /* Create a dummy frame descriptor. */
390 frame = &format->frame[0];
391 memset(&format->frame[0], 0, sizeof format->frame[0]);
392 frame->bFrameIntervalType = 1;
393 frame->dwDefaultFrameInterval = 1;
394 frame->dwFrameInterval = *intervals;
395 *(*intervals)++ = 1;
396 format->nframes = 1;
397 break;
398
399 case VS_FORMAT_MPEG2TS:
400 case VS_FORMAT_STREAM_BASED:
401 /* Not supported yet. */
402 default:
403 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
404 "interface %d unsupported format %u\n",
405 dev->udev->devnum, alts->desc.bInterfaceNumber,
406 buffer[2]);
407 return -EINVAL;
408 }
409
410 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
411
412 buflen -= buffer[0];
413 buffer += buffer[0];
414
415 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
416 * based formats have frame descriptors.
417 */
418 while (buflen > 2 && buffer[2] == ftype) {
419 frame = &format->frame[format->nframes];
420 if (ftype != VS_FRAME_FRAME_BASED)
421 n = buflen > 25 ? buffer[25] : 0;
422 else
423 n = buflen > 21 ? buffer[21] : 0;
424
425 n = n ? n : 3;
426
427 if (buflen < 26 + 4*n) {
428 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
429 "interface %d FRAME error\n", dev->udev->devnum,
430 alts->desc.bInterfaceNumber);
431 return -EINVAL;
432 }
433
434 frame->bFrameIndex = buffer[3];
435 frame->bmCapabilities = buffer[4];
436 frame->wWidth = get_unaligned_le16(&buffer[5]);
437 frame->wHeight = get_unaligned_le16(&buffer[7]);
438 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
439 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
440 if (ftype != VS_FRAME_FRAME_BASED) {
441 frame->dwMaxVideoFrameBufferSize =
442 get_unaligned_le32(&buffer[17]);
443 frame->dwDefaultFrameInterval =
444 get_unaligned_le32(&buffer[21]);
445 frame->bFrameIntervalType = buffer[25];
446 } else {
447 frame->dwMaxVideoFrameBufferSize = 0;
448 frame->dwDefaultFrameInterval =
449 get_unaligned_le32(&buffer[17]);
450 frame->bFrameIntervalType = buffer[21];
451 }
452 frame->dwFrameInterval = *intervals;
453
454 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
455 * completely. Observed behaviours range from setting the
456 * value to 1.1x the actual frame size to hardwiring the
457 * 16 low bits to 0. This results in a higher than necessary
458 * memory usage as well as a wrong image size information. For
459 * uncompressed formats this can be fixed by computing the
460 * value from the frame size.
461 */
462 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
463 frame->dwMaxVideoFrameBufferSize = format->bpp
464 * frame->wWidth * frame->wHeight / 8;
465
466 /* Some bogus devices report dwMinFrameInterval equal to
467 * dwMaxFrameInterval and have dwFrameIntervalStep set to
468 * zero. Setting all null intervals to 1 fixes the problem and
469 * some other divisions by zero that could happen.
470 */
471 for (i = 0; i < n; ++i) {
472 interval = get_unaligned_le32(&buffer[26+4*i]);
473 *(*intervals)++ = interval ? interval : 1;
474 }
475
476 /* Make sure that the default frame interval stays between
477 * the boundaries.
478 */
479 n -= frame->bFrameIntervalType ? 1 : 2;
480 frame->dwDefaultFrameInterval =
481 min(frame->dwFrameInterval[n],
482 max(frame->dwFrameInterval[0],
483 frame->dwDefaultFrameInterval));
484
485 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
486 frame->wWidth, frame->wHeight,
487 10000000/frame->dwDefaultFrameInterval,
488 (100000000/frame->dwDefaultFrameInterval)%10);
489
490 format->nframes++;
491 buflen -= buffer[0];
492 buffer += buffer[0];
493 }
494
495 if (buflen > 2 && buffer[2] == VS_STILL_IMAGE_FRAME) {
496 buflen -= buffer[0];
497 buffer += buffer[0];
498 }
499
500 if (buflen > 2 && buffer[2] == VS_COLORFORMAT) {
501 if (buflen < 6) {
502 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
503 "interface %d COLORFORMAT error\n",
504 dev->udev->devnum,
505 alts->desc.bInterfaceNumber);
506 return -EINVAL;
507 }
508
509 format->colorspace = uvc_colorspace(buffer[3]);
510
511 buflen -= buffer[0];
512 buffer += buffer[0];
513 }
514
515 return buffer - start;
516 }
517
518 static int uvc_parse_streaming(struct uvc_device *dev,
519 struct usb_interface *intf)
520 {
521 struct uvc_streaming *streaming = NULL;
522 struct uvc_format *format;
523 struct uvc_frame *frame;
524 struct usb_host_interface *alts = &intf->altsetting[0];
525 unsigned char *_buffer, *buffer = alts->extra;
526 int _buflen, buflen = alts->extralen;
527 unsigned int nformats = 0, nframes = 0, nintervals = 0;
528 unsigned int size, i, n, p;
529 __u32 *interval;
530 __u16 psize;
531 int ret = -EINVAL;
532
533 if (intf->cur_altsetting->desc.bInterfaceSubClass
534 != SC_VIDEOSTREAMING) {
535 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
536 "video streaming interface\n", dev->udev->devnum,
537 intf->altsetting[0].desc.bInterfaceNumber);
538 return -EINVAL;
539 }
540
541 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
542 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
543 "claimed\n", dev->udev->devnum,
544 intf->altsetting[0].desc.bInterfaceNumber);
545 return -EINVAL;
546 }
547
548 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
549 if (streaming == NULL) {
550 usb_driver_release_interface(&uvc_driver.driver, intf);
551 return -EINVAL;
552 }
553
554 mutex_init(&streaming->mutex);
555 streaming->intf = usb_get_intf(intf);
556 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
557
558 /* The Pico iMage webcam has its class-specific interface descriptors
559 * after the endpoint descriptors.
560 */
561 if (buflen == 0) {
562 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
563 struct usb_host_endpoint *ep = &alts->endpoint[i];
564
565 if (ep->extralen == 0)
566 continue;
567
568 if (ep->extralen > 2 &&
569 ep->extra[1] == USB_DT_CS_INTERFACE) {
570 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
571 "from endpoint %u.\n", i);
572 buffer = alts->endpoint[i].extra;
573 buflen = alts->endpoint[i].extralen;
574 break;
575 }
576 }
577 }
578
579 /* Skip the standard interface descriptors. */
580 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
581 buflen -= buffer[0];
582 buffer += buffer[0];
583 }
584
585 if (buflen <= 2) {
586 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
587 "interface descriptors found.\n");
588 goto error;
589 }
590
591 /* Parse the header descriptor. */
592 switch (buffer[2]) {
593 case VS_OUTPUT_HEADER:
594 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
595 size = 9;
596 break;
597
598 case VS_INPUT_HEADER:
599 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
600 size = 13;
601 break;
602
603 default:
604 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
605 "%d HEADER descriptor not found.\n", dev->udev->devnum,
606 alts->desc.bInterfaceNumber);
607 goto error;
608 }
609
610 p = buflen >= 4 ? buffer[3] : 0;
611 n = buflen >= size ? buffer[size-1] : 0;
612
613 if (buflen < size + p*n) {
614 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
615 "interface %d HEADER descriptor is invalid.\n",
616 dev->udev->devnum, alts->desc.bInterfaceNumber);
617 goto error;
618 }
619
620 streaming->header.bNumFormats = p;
621 streaming->header.bEndpointAddress = buffer[6];
622 if (buffer[2] == VS_INPUT_HEADER) {
623 streaming->header.bmInfo = buffer[7];
624 streaming->header.bTerminalLink = buffer[8];
625 streaming->header.bStillCaptureMethod = buffer[9];
626 streaming->header.bTriggerSupport = buffer[10];
627 streaming->header.bTriggerUsage = buffer[11];
628 } else {
629 streaming->header.bTerminalLink = buffer[7];
630 }
631 streaming->header.bControlSize = n;
632
633 streaming->header.bmaControls = kmalloc(p*n, GFP_KERNEL);
634 if (streaming->header.bmaControls == NULL) {
635 ret = -ENOMEM;
636 goto error;
637 }
638
639 memcpy(streaming->header.bmaControls, &buffer[size], p*n);
640
641 buflen -= buffer[0];
642 buffer += buffer[0];
643
644 _buffer = buffer;
645 _buflen = buflen;
646
647 /* Count the format and frame descriptors. */
648 while (_buflen > 2 && _buffer[1] == CS_INTERFACE) {
649 switch (_buffer[2]) {
650 case VS_FORMAT_UNCOMPRESSED:
651 case VS_FORMAT_MJPEG:
652 case VS_FORMAT_FRAME_BASED:
653 nformats++;
654 break;
655
656 case VS_FORMAT_DV:
657 /* DV format has no frame descriptor. We will create a
658 * dummy frame descriptor with a dummy frame interval.
659 */
660 nformats++;
661 nframes++;
662 nintervals++;
663 break;
664
665 case VS_FORMAT_MPEG2TS:
666 case VS_FORMAT_STREAM_BASED:
667 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
668 "interface %d FORMAT %u is not supported.\n",
669 dev->udev->devnum,
670 alts->desc.bInterfaceNumber, _buffer[2]);
671 break;
672
673 case VS_FRAME_UNCOMPRESSED:
674 case VS_FRAME_MJPEG:
675 nframes++;
676 if (_buflen > 25)
677 nintervals += _buffer[25] ? _buffer[25] : 3;
678 break;
679
680 case VS_FRAME_FRAME_BASED:
681 nframes++;
682 if (_buflen > 21)
683 nintervals += _buffer[21] ? _buffer[21] : 3;
684 break;
685 }
686
687 _buflen -= _buffer[0];
688 _buffer += _buffer[0];
689 }
690
691 if (nformats == 0) {
692 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
693 "%d has no supported formats defined.\n",
694 dev->udev->devnum, alts->desc.bInterfaceNumber);
695 goto error;
696 }
697
698 size = nformats * sizeof *format + nframes * sizeof *frame
699 + nintervals * sizeof *interval;
700 format = kzalloc(size, GFP_KERNEL);
701 if (format == NULL) {
702 ret = -ENOMEM;
703 goto error;
704 }
705
706 frame = (struct uvc_frame *)&format[nformats];
707 interval = (__u32 *)&frame[nframes];
708
709 streaming->format = format;
710 streaming->nformats = nformats;
711
712 /* Parse the format descriptors. */
713 while (buflen > 2 && buffer[1] == CS_INTERFACE) {
714 switch (buffer[2]) {
715 case VS_FORMAT_UNCOMPRESSED:
716 case VS_FORMAT_MJPEG:
717 case VS_FORMAT_DV:
718 case VS_FORMAT_FRAME_BASED:
719 format->frame = frame;
720 ret = uvc_parse_format(dev, streaming, format,
721 &interval, buffer, buflen);
722 if (ret < 0)
723 goto error;
724
725 frame += format->nframes;
726 format++;
727
728 buflen -= ret;
729 buffer += ret;
730 continue;
731
732 default:
733 break;
734 }
735
736 buflen -= buffer[0];
737 buffer += buffer[0];
738 }
739
740 /* Parse the alternate settings to find the maximum bandwidth. */
741 for (i = 0; i < intf->num_altsetting; ++i) {
742 struct usb_host_endpoint *ep;
743 alts = &intf->altsetting[i];
744 ep = uvc_find_endpoint(alts,
745 streaming->header.bEndpointAddress);
746 if (ep == NULL)
747 continue;
748
749 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
750 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
751 if (psize > streaming->maxpsize)
752 streaming->maxpsize = psize;
753 }
754
755 list_add_tail(&streaming->list, &dev->streaming);
756 return 0;
757
758 error:
759 usb_driver_release_interface(&uvc_driver.driver, intf);
760 usb_put_intf(intf);
761 kfree(streaming->format);
762 kfree(streaming->header.bmaControls);
763 kfree(streaming);
764 return ret;
765 }
766
767 /* Parse vendor-specific extensions. */
768 static int uvc_parse_vendor_control(struct uvc_device *dev,
769 const unsigned char *buffer, int buflen)
770 {
771 struct usb_device *udev = dev->udev;
772 struct usb_host_interface *alts = dev->intf->cur_altsetting;
773 struct uvc_entity *unit;
774 unsigned int n, p;
775 int handled = 0;
776
777 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
778 case 0x046d: /* Logitech */
779 if (buffer[1] != 0x41 || buffer[2] != 0x01)
780 break;
781
782 /* Logitech implements several vendor specific functions
783 * through vendor specific extension units (LXU).
784 *
785 * The LXU descriptors are similar to XU descriptors
786 * (see "USB Device Video Class for Video Devices", section
787 * 3.7.2.6 "Extension Unit Descriptor") with the following
788 * differences:
789 *
790 * ----------------------------------------------------------
791 * 0 bLength 1 Number
792 * Size of this descriptor, in bytes: 24+p+n*2
793 * ----------------------------------------------------------
794 * 23+p+n bmControlsType N Bitmap
795 * Individual bits in the set are defined:
796 * 0: Absolute
797 * 1: Relative
798 *
799 * This bitset is mapped exactly the same as bmControls.
800 * ----------------------------------------------------------
801 * 23+p+n*2 bReserved 1 Boolean
802 * ----------------------------------------------------------
803 * 24+p+n*2 iExtension 1 Index
804 * Index of a string descriptor that describes this
805 * extension unit.
806 * ----------------------------------------------------------
807 */
808 p = buflen >= 22 ? buffer[21] : 0;
809 n = buflen >= 25 + p ? buffer[22+p] : 0;
810
811 if (buflen < 25 + p + 2*n) {
812 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
813 "interface %d EXTENSION_UNIT error\n",
814 udev->devnum, alts->desc.bInterfaceNumber);
815 break;
816 }
817
818 unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL);
819 if (unit == NULL)
820 return -ENOMEM;
821
822 unit->id = buffer[3];
823 unit->type = VC_EXTENSION_UNIT;
824 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
825 unit->extension.bNumControls = buffer[20];
826 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
827 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
828 memcpy(unit->extension.baSourceID, &buffer[22], p);
829 unit->extension.bControlSize = buffer[22+p];
830 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
831 unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit
832 + p + n;
833 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
834
835 if (buffer[24+p+2*n] != 0)
836 usb_string(udev, buffer[24+p+2*n], unit->name,
837 sizeof unit->name);
838 else
839 sprintf(unit->name, "Extension %u", buffer[3]);
840
841 list_add_tail(&unit->list, &dev->entities);
842 handled = 1;
843 break;
844 }
845
846 return handled;
847 }
848
849 static int uvc_parse_standard_control(struct uvc_device *dev,
850 const unsigned char *buffer, int buflen)
851 {
852 struct usb_device *udev = dev->udev;
853 struct uvc_entity *unit, *term;
854 struct usb_interface *intf;
855 struct usb_host_interface *alts = dev->intf->cur_altsetting;
856 unsigned int i, n, p, len;
857 __u16 type;
858
859 switch (buffer[2]) {
860 case VC_HEADER:
861 n = buflen >= 12 ? buffer[11] : 0;
862
863 if (buflen < 12 || buflen < 12 + n) {
864 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
865 "interface %d HEADER error\n", udev->devnum,
866 alts->desc.bInterfaceNumber);
867 return -EINVAL;
868 }
869
870 dev->uvc_version = get_unaligned_le16(&buffer[3]);
871 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
872
873 /* Parse all USB Video Streaming interfaces. */
874 for (i = 0; i < n; ++i) {
875 intf = usb_ifnum_to_if(udev, buffer[12+i]);
876 if (intf == NULL) {
877 uvc_trace(UVC_TRACE_DESCR, "device %d "
878 "interface %d doesn't exists\n",
879 udev->devnum, i);
880 continue;
881 }
882
883 uvc_parse_streaming(dev, intf);
884 }
885 break;
886
887 case VC_INPUT_TERMINAL:
888 if (buflen < 8) {
889 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
890 "interface %d INPUT_TERMINAL error\n",
891 udev->devnum, alts->desc.bInterfaceNumber);
892 return -EINVAL;
893 }
894
895 /* Make sure the terminal type MSB is not null, otherwise it
896 * could be confused with a unit.
897 */
898 type = get_unaligned_le16(&buffer[4]);
899 if ((type & 0xff00) == 0) {
900 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
901 "interface %d INPUT_TERMINAL %d has invalid "
902 "type 0x%04x, skipping\n", udev->devnum,
903 alts->desc.bInterfaceNumber,
904 buffer[3], type);
905 return 0;
906 }
907
908 n = 0;
909 p = 0;
910 len = 8;
911
912 if (type == ITT_CAMERA) {
913 n = buflen >= 15 ? buffer[14] : 0;
914 len = 15;
915
916 } else if (type == ITT_MEDIA_TRANSPORT_INPUT) {
917 n = buflen >= 9 ? buffer[8] : 0;
918 p = buflen >= 10 + n ? buffer[9+n] : 0;
919 len = 10;
920 }
921
922 if (buflen < len + n + p) {
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 term = kzalloc(sizeof *term + n + p, GFP_KERNEL);
930 if (term == NULL)
931 return -ENOMEM;
932
933 term->id = buffer[3];
934 term->type = type | UVC_TERM_INPUT;
935
936 if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) {
937 term->camera.bControlSize = n;
938 term->camera.bmControls = (__u8 *)term + sizeof *term;
939 term->camera.wObjectiveFocalLengthMin =
940 get_unaligned_le16(&buffer[8]);
941 term->camera.wObjectiveFocalLengthMax =
942 get_unaligned_le16(&buffer[10]);
943 term->camera.wOcularFocalLength =
944 get_unaligned_le16(&buffer[12]);
945 memcpy(term->camera.bmControls, &buffer[15], n);
946 } else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) {
947 term->media.bControlSize = n;
948 term->media.bmControls = (__u8 *)term + sizeof *term;
949 term->media.bTransportModeSize = p;
950 term->media.bmTransportModes = (__u8 *)term
951 + sizeof *term + n;
952 memcpy(term->media.bmControls, &buffer[9], n);
953 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
954 }
955
956 if (buffer[7] != 0)
957 usb_string(udev, buffer[7], term->name,
958 sizeof term->name);
959 else if (UVC_ENTITY_TYPE(term) == ITT_CAMERA)
960 sprintf(term->name, "Camera %u", buffer[3]);
961 else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT)
962 sprintf(term->name, "Media %u", buffer[3]);
963 else
964 sprintf(term->name, "Input %u", buffer[3]);
965
966 list_add_tail(&term->list, &dev->entities);
967 break;
968
969 case VC_OUTPUT_TERMINAL:
970 if (buflen < 9) {
971 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
972 "interface %d OUTPUT_TERMINAL error\n",
973 udev->devnum, alts->desc.bInterfaceNumber);
974 return -EINVAL;
975 }
976
977 /* Make sure the terminal type MSB is not null, otherwise it
978 * could be confused with a unit.
979 */
980 type = get_unaligned_le16(&buffer[4]);
981 if ((type & 0xff00) == 0) {
982 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
983 "interface %d OUTPUT_TERMINAL %d has invalid "
984 "type 0x%04x, skipping\n", udev->devnum,
985 alts->desc.bInterfaceNumber, buffer[3], type);
986 return 0;
987 }
988
989 term = kzalloc(sizeof *term, GFP_KERNEL);
990 if (term == NULL)
991 return -ENOMEM;
992
993 term->id = buffer[3];
994 term->type = type | UVC_TERM_OUTPUT;
995 term->output.bSourceID = buffer[7];
996
997 if (buffer[8] != 0)
998 usb_string(udev, buffer[8], term->name,
999 sizeof term->name);
1000 else
1001 sprintf(term->name, "Output %u", buffer[3]);
1002
1003 list_add_tail(&term->list, &dev->entities);
1004 break;
1005
1006 case VC_SELECTOR_UNIT:
1007 p = buflen >= 5 ? buffer[4] : 0;
1008
1009 if (buflen < 5 || buflen < 6 + p) {
1010 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1011 "interface %d SELECTOR_UNIT error\n",
1012 udev->devnum, alts->desc.bInterfaceNumber);
1013 return -EINVAL;
1014 }
1015
1016 unit = kzalloc(sizeof *unit + p, GFP_KERNEL);
1017 if (unit == NULL)
1018 return -ENOMEM;
1019
1020 unit->id = buffer[3];
1021 unit->type = buffer[2];
1022 unit->selector.bNrInPins = buffer[4];
1023 unit->selector.baSourceID = (__u8 *)unit + sizeof *unit;
1024 memcpy(unit->selector.baSourceID, &buffer[5], p);
1025
1026 if (buffer[5+p] != 0)
1027 usb_string(udev, buffer[5+p], unit->name,
1028 sizeof unit->name);
1029 else
1030 sprintf(unit->name, "Selector %u", buffer[3]);
1031
1032 list_add_tail(&unit->list, &dev->entities);
1033 break;
1034
1035 case VC_PROCESSING_UNIT:
1036 n = buflen >= 8 ? buffer[7] : 0;
1037 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1038
1039 if (buflen < p + n) {
1040 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1041 "interface %d PROCESSING_UNIT error\n",
1042 udev->devnum, alts->desc.bInterfaceNumber);
1043 return -EINVAL;
1044 }
1045
1046 unit = kzalloc(sizeof *unit + n, GFP_KERNEL);
1047 if (unit == NULL)
1048 return -ENOMEM;
1049
1050 unit->id = buffer[3];
1051 unit->type = buffer[2];
1052 unit->processing.bSourceID = buffer[4];
1053 unit->processing.wMaxMultiplier =
1054 get_unaligned_le16(&buffer[5]);
1055 unit->processing.bControlSize = buffer[7];
1056 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1057 memcpy(unit->processing.bmControls, &buffer[8], n);
1058 if (dev->uvc_version >= 0x0110)
1059 unit->processing.bmVideoStandards = buffer[9+n];
1060
1061 if (buffer[8+n] != 0)
1062 usb_string(udev, buffer[8+n], unit->name,
1063 sizeof unit->name);
1064 else
1065 sprintf(unit->name, "Processing %u", buffer[3]);
1066
1067 list_add_tail(&unit->list, &dev->entities);
1068 break;
1069
1070 case VC_EXTENSION_UNIT:
1071 p = buflen >= 22 ? buffer[21] : 0;
1072 n = buflen >= 24 + p ? buffer[22+p] : 0;
1073
1074 if (buflen < 24 + p + n) {
1075 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1076 "interface %d EXTENSION_UNIT error\n",
1077 udev->devnum, alts->desc.bInterfaceNumber);
1078 return -EINVAL;
1079 }
1080
1081 unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL);
1082 if (unit == NULL)
1083 return -ENOMEM;
1084
1085 unit->id = buffer[3];
1086 unit->type = buffer[2];
1087 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1088 unit->extension.bNumControls = buffer[20];
1089 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
1090 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
1091 memcpy(unit->extension.baSourceID, &buffer[22], p);
1092 unit->extension.bControlSize = buffer[22+p];
1093 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
1094 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1095
1096 if (buffer[23+p+n] != 0)
1097 usb_string(udev, buffer[23+p+n], unit->name,
1098 sizeof unit->name);
1099 else
1100 sprintf(unit->name, "Extension %u", buffer[3]);
1101
1102 list_add_tail(&unit->list, &dev->entities);
1103 break;
1104
1105 default:
1106 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1107 "descriptor (%u)\n", buffer[2]);
1108 break;
1109 }
1110
1111 return 0;
1112 }
1113
1114 static int uvc_parse_control(struct uvc_device *dev)
1115 {
1116 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1117 unsigned char *buffer = alts->extra;
1118 int buflen = alts->extralen;
1119 int ret;
1120
1121 /* Parse the default alternate setting only, as the UVC specification
1122 * defines a single alternate setting, the default alternate setting
1123 * zero.
1124 */
1125
1126 while (buflen > 2) {
1127 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1128 buffer[1] != USB_DT_CS_INTERFACE)
1129 goto next_descriptor;
1130
1131 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1132 return ret;
1133
1134 next_descriptor:
1135 buflen -= buffer[0];
1136 buffer += buffer[0];
1137 }
1138
1139 /* Check if the optional status endpoint is present. Built-in iSight
1140 * webcams have an interrupt endpoint but spit proprietary data that
1141 * don't conform to the UVC status endpoint messages. Don't try to
1142 * handle the interrupt endpoint for those cameras.
1143 */
1144 if (alts->desc.bNumEndpoints == 1 &&
1145 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1146 struct usb_host_endpoint *ep = &alts->endpoint[0];
1147 struct usb_endpoint_descriptor *desc = &ep->desc;
1148
1149 if (usb_endpoint_is_int_in(desc) &&
1150 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1151 desc->bInterval != 0) {
1152 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1153 "(addr %02x).\n", desc->bEndpointAddress);
1154 dev->int_ep = ep;
1155 }
1156 }
1157
1158 return 0;
1159 }
1160
1161 /* ------------------------------------------------------------------------
1162 * USB probe and disconnect
1163 */
1164
1165 /*
1166 * Unregister the video devices.
1167 */
1168 static void uvc_unregister_video(struct uvc_device *dev)
1169 {
1170 if (dev->video.vdev) {
1171 if (dev->video.vdev->minor == -1)
1172 video_device_release(dev->video.vdev);
1173 else
1174 video_unregister_device(dev->video.vdev);
1175 dev->video.vdev = NULL;
1176 }
1177 }
1178
1179 /*
1180 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1181 * and containing the following units:
1182 *
1183 * - one Output Terminal (USB Streaming or Display)
1184 * - zero or one Processing Unit
1185 * - zero, one or mode single-input Selector Units
1186 * - zero or one multiple-input Selector Units, provided all inputs are
1187 * connected to input terminals
1188 * - zero, one or mode single-input Extension Units
1189 * - one or more Input Terminals (Camera, External or USB Streaming)
1190 *
1191 * A side forward scan is made on each detected entity to check for additional
1192 * extension units.
1193 */
1194 static int uvc_scan_chain_entity(struct uvc_video_device *video,
1195 struct uvc_entity *entity)
1196 {
1197 switch (UVC_ENTITY_TYPE(entity)) {
1198 case VC_EXTENSION_UNIT:
1199 if (uvc_trace_param & UVC_TRACE_PROBE)
1200 printk(" <- XU %d", entity->id);
1201
1202 if (entity->extension.bNrInPins != 1) {
1203 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1204 "than 1 input pin.\n", entity->id);
1205 return -1;
1206 }
1207
1208 list_add_tail(&entity->chain, &video->extensions);
1209 break;
1210
1211 case VC_PROCESSING_UNIT:
1212 if (uvc_trace_param & UVC_TRACE_PROBE)
1213 printk(" <- PU %d", entity->id);
1214
1215 if (video->processing != NULL) {
1216 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1217 "Processing Units in chain.\n");
1218 return -1;
1219 }
1220
1221 video->processing = entity;
1222 break;
1223
1224 case VC_SELECTOR_UNIT:
1225 if (uvc_trace_param & UVC_TRACE_PROBE)
1226 printk(" <- SU %d", entity->id);
1227
1228 /* Single-input selector units are ignored. */
1229 if (entity->selector.bNrInPins == 1)
1230 break;
1231
1232 if (video->selector != NULL) {
1233 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1234 "Units in chain.\n");
1235 return -1;
1236 }
1237
1238 video->selector = entity;
1239 break;
1240
1241 case ITT_VENDOR_SPECIFIC:
1242 case ITT_CAMERA:
1243 case ITT_MEDIA_TRANSPORT_INPUT:
1244 if (uvc_trace_param & UVC_TRACE_PROBE)
1245 printk(" <- IT %d\n", entity->id);
1246
1247 list_add_tail(&entity->chain, &video->iterms);
1248 break;
1249
1250 case TT_STREAMING:
1251 if (uvc_trace_param & UVC_TRACE_PROBE)
1252 printk(" <- IT %d\n", entity->id);
1253
1254 if (!UVC_ENTITY_IS_ITERM(entity)) {
1255 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1256 "terminal %u.\n", entity->id);
1257 return -1;
1258 }
1259
1260 if (video->sterm != NULL) {
1261 uvc_trace(UVC_TRACE_DESCR, "Found multiple streaming "
1262 "entities in chain.\n");
1263 return -1;
1264 }
1265
1266 list_add_tail(&entity->chain, &video->iterms);
1267 video->sterm = entity;
1268 break;
1269
1270 default:
1271 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1272 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1273 return -1;
1274 }
1275
1276 return 0;
1277 }
1278
1279 static int uvc_scan_chain_forward(struct uvc_video_device *video,
1280 struct uvc_entity *entity, struct uvc_entity *prev)
1281 {
1282 struct uvc_entity *forward;
1283 int found;
1284
1285 /* Forward scan */
1286 forward = NULL;
1287 found = 0;
1288
1289 while (1) {
1290 forward = uvc_entity_by_reference(video->dev, entity->id,
1291 forward);
1292 if (forward == NULL)
1293 break;
1294
1295 if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT ||
1296 forward == prev)
1297 continue;
1298
1299 if (forward->extension.bNrInPins != 1) {
1300 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has "
1301 "more than 1 input pin.\n", entity->id);
1302 return -1;
1303 }
1304
1305 list_add_tail(&forward->chain, &video->extensions);
1306 if (uvc_trace_param & UVC_TRACE_PROBE) {
1307 if (!found)
1308 printk(" (-> XU");
1309
1310 printk(" %d", forward->id);
1311 found = 1;
1312 }
1313 }
1314 if (found)
1315 printk(")");
1316
1317 return 0;
1318 }
1319
1320 static int uvc_scan_chain_backward(struct uvc_video_device *video,
1321 struct uvc_entity *entity)
1322 {
1323 struct uvc_entity *term;
1324 int id = -1, i;
1325
1326 switch (UVC_ENTITY_TYPE(entity)) {
1327 case VC_EXTENSION_UNIT:
1328 id = entity->extension.baSourceID[0];
1329 break;
1330
1331 case VC_PROCESSING_UNIT:
1332 id = entity->processing.bSourceID;
1333 break;
1334
1335 case VC_SELECTOR_UNIT:
1336 /* Single-input selector units are ignored. */
1337 if (entity->selector.bNrInPins == 1) {
1338 id = entity->selector.baSourceID[0];
1339 break;
1340 }
1341
1342 if (uvc_trace_param & UVC_TRACE_PROBE)
1343 printk(" <- IT");
1344
1345 video->selector = entity;
1346 for (i = 0; i < entity->selector.bNrInPins; ++i) {
1347 id = entity->selector.baSourceID[i];
1348 term = uvc_entity_by_id(video->dev, id);
1349 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1350 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1351 "input %d isn't connected to an "
1352 "input terminal\n", entity->id, i);
1353 return -1;
1354 }
1355
1356 if (uvc_trace_param & UVC_TRACE_PROBE)
1357 printk(" %d", term->id);
1358
1359 list_add_tail(&term->chain, &video->iterms);
1360 uvc_scan_chain_forward(video, term, entity);
1361 }
1362
1363 if (uvc_trace_param & UVC_TRACE_PROBE)
1364 printk("\n");
1365
1366 id = 0;
1367 break;
1368 }
1369
1370 return id;
1371 }
1372
1373 static int uvc_scan_chain(struct uvc_video_device *video)
1374 {
1375 struct uvc_entity *entity, *prev;
1376 int id;
1377
1378 entity = video->oterm;
1379 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id);
1380
1381 if (UVC_ENTITY_TYPE(entity) == TT_STREAMING)
1382 video->sterm = entity;
1383
1384 id = entity->output.bSourceID;
1385 while (id != 0) {
1386 prev = entity;
1387 entity = uvc_entity_by_id(video->dev, id);
1388 if (entity == NULL) {
1389 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1390 "unknown entity %d.\n", id);
1391 return -1;
1392 }
1393
1394 /* Process entity */
1395 if (uvc_scan_chain_entity(video, entity) < 0)
1396 return -1;
1397
1398 /* Forward scan */
1399 if (uvc_scan_chain_forward(video, entity, prev) < 0)
1400 return -1;
1401
1402 /* Stop when a terminal is found. */
1403 if (!UVC_ENTITY_IS_UNIT(entity))
1404 break;
1405
1406 /* Backward scan */
1407 id = uvc_scan_chain_backward(video, entity);
1408 if (id < 0)
1409 return id;
1410 }
1411
1412 if (video->sterm == NULL) {
1413 uvc_trace(UVC_TRACE_DESCR, "No streaming entity found in "
1414 "chain.\n");
1415 return -1;
1416 }
1417
1418 return 0;
1419 }
1420
1421 /*
1422 * Register the video devices.
1423 *
1424 * The driver currently supports a single video device per control interface
1425 * only. The terminal and units must match the following structure:
1426 *
1427 * ITT_* -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING
1428 * TT_STREAMING -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> OTT_*
1429 *
1430 * The Extension Units, if present, must have a single input pin. The
1431 * Processing Unit and Extension Units can be in any order. Additional
1432 * Extension Units connected to the main chain as single-unit branches are
1433 * also supported.
1434 */
1435 static int uvc_register_video(struct uvc_device *dev)
1436 {
1437 struct video_device *vdev;
1438 struct uvc_entity *term;
1439 int found = 0, ret;
1440
1441 /* Check if the control interface matches the structure we expect. */
1442 list_for_each_entry(term, &dev->entities, list) {
1443 struct uvc_streaming *streaming;
1444
1445 if (!UVC_ENTITY_IS_TERM(term) || !UVC_ENTITY_IS_OTERM(term))
1446 continue;
1447
1448 memset(&dev->video, 0, sizeof dev->video);
1449 mutex_init(&dev->video.ctrl_mutex);
1450 INIT_LIST_HEAD(&dev->video.iterms);
1451 INIT_LIST_HEAD(&dev->video.extensions);
1452 dev->video.oterm = term;
1453 dev->video.dev = dev;
1454 if (uvc_scan_chain(&dev->video) < 0)
1455 continue;
1456
1457 list_for_each_entry(streaming, &dev->streaming, list) {
1458 if (streaming->header.bTerminalLink ==
1459 dev->video.sterm->id) {
1460 dev->video.streaming = streaming;
1461 found = 1;
1462 break;
1463 }
1464 }
1465
1466 if (found)
1467 break;
1468 }
1469
1470 if (!found) {
1471 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1472 return -1;
1473 }
1474
1475 if (uvc_trace_param & UVC_TRACE_PROBE) {
1476 uvc_printk(KERN_INFO, "Found a valid video chain (");
1477 list_for_each_entry(term, &dev->video.iterms, chain) {
1478 printk("%d", term->id);
1479 if (term->chain.next != &dev->video.iterms)
1480 printk(",");
1481 }
1482 printk(" -> %d).\n", dev->video.oterm->id);
1483 }
1484
1485 /* Initialize the video buffers queue. */
1486 uvc_queue_init(&dev->video.queue, dev->video.streaming->type);
1487
1488 /* Initialize the streaming interface with default streaming
1489 * parameters.
1490 */
1491 if ((ret = uvc_video_init(&dev->video)) < 0) {
1492 uvc_printk(KERN_ERR, "Failed to initialize the device "
1493 "(%d).\n", ret);
1494 return ret;
1495 }
1496
1497 /* Register the device with V4L. */
1498 vdev = video_device_alloc();
1499 if (vdev == NULL)
1500 return -1;
1501
1502 /* We already hold a reference to dev->udev. The video device will be
1503 * unregistered before the reference is released, so we don't need to
1504 * get another one.
1505 */
1506 vdev->parent = &dev->intf->dev;
1507 vdev->minor = -1;
1508 vdev->fops = &uvc_fops;
1509 vdev->release = video_device_release;
1510 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1511
1512 /* Set the driver data before calling video_register_device, otherwise
1513 * uvc_v4l2_open might race us.
1514 */
1515 dev->video.vdev = vdev;
1516 video_set_drvdata(vdev, &dev->video);
1517
1518 if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
1519 dev->video.vdev = NULL;
1520 video_device_release(vdev);
1521 return -1;
1522 }
1523
1524 return 0;
1525 }
1526
1527 /*
1528 * Delete the UVC device.
1529 *
1530 * Called by the kernel when the last reference to the uvc_device structure
1531 * is released.
1532 *
1533 * Unregistering the video devices is done here because every opened instance
1534 * must be closed before the device can be unregistered. An alternative would
1535 * have been to use another reference count for uvc_v4l2_open/uvc_release, and
1536 * unregister the video devices on disconnect when that reference count drops
1537 * to zero.
1538 *
1539 * As this function is called after or during disconnect(), all URBs have
1540 * already been canceled by the USB core. There is no need to kill the
1541 * interrupt URB manually.
1542 */
1543 void uvc_delete(struct kref *kref)
1544 {
1545 struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
1546 struct list_head *p, *n;
1547
1548 /* Unregister the video device. */
1549 uvc_unregister_video(dev);
1550 usb_put_intf(dev->intf);
1551 usb_put_dev(dev->udev);
1552
1553 uvc_status_cleanup(dev);
1554 uvc_ctrl_cleanup_device(dev);
1555
1556 list_for_each_safe(p, n, &dev->entities) {
1557 struct uvc_entity *entity;
1558 entity = list_entry(p, struct uvc_entity, list);
1559 kfree(entity);
1560 }
1561
1562 list_for_each_safe(p, n, &dev->streaming) {
1563 struct uvc_streaming *streaming;
1564 streaming = list_entry(p, struct uvc_streaming, list);
1565 usb_driver_release_interface(&uvc_driver.driver,
1566 streaming->intf);
1567 usb_put_intf(streaming->intf);
1568 kfree(streaming->format);
1569 kfree(streaming->header.bmaControls);
1570 kfree(streaming);
1571 }
1572
1573 kfree(dev);
1574 }
1575
1576 static int uvc_probe(struct usb_interface *intf,
1577 const struct usb_device_id *id)
1578 {
1579 struct usb_device *udev = interface_to_usbdev(intf);
1580 struct uvc_device *dev;
1581 int ret;
1582
1583 if (id->idVendor && id->idProduct)
1584 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1585 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1586 id->idProduct);
1587 else
1588 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1589 udev->devpath);
1590
1591 /* Allocate memory for the device and initialize it. */
1592 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1593 return -ENOMEM;
1594
1595 INIT_LIST_HEAD(&dev->entities);
1596 INIT_LIST_HEAD(&dev->streaming);
1597 kref_init(&dev->kref);
1598 atomic_set(&dev->users, 0);
1599
1600 dev->udev = usb_get_dev(udev);
1601 dev->intf = usb_get_intf(intf);
1602 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1603 dev->quirks = id->driver_info | uvc_quirks_param;
1604
1605 if (udev->product != NULL)
1606 strlcpy(dev->name, udev->product, sizeof dev->name);
1607 else
1608 snprintf(dev->name, sizeof dev->name,
1609 "UVC Camera (%04x:%04x)",
1610 le16_to_cpu(udev->descriptor.idVendor),
1611 le16_to_cpu(udev->descriptor.idProduct));
1612
1613 /* Parse the Video Class control descriptor. */
1614 if (uvc_parse_control(dev) < 0) {
1615 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1616 "descriptors.\n");
1617 goto error;
1618 }
1619
1620 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1621 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1622 udev->product ? udev->product : "<unnamed>",
1623 le16_to_cpu(udev->descriptor.idVendor),
1624 le16_to_cpu(udev->descriptor.idProduct));
1625
1626 if (uvc_quirks_param != 0) {
1627 uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module "
1628 "parameter for testing purpose.\n", uvc_quirks_param);
1629 uvc_printk(KERN_INFO, "Please report required quirks to the "
1630 "linux-uvc-devel mailing list.\n");
1631 }
1632
1633 /* Initialize controls. */
1634 if (uvc_ctrl_init_device(dev) < 0)
1635 goto error;
1636
1637 /* Register the video devices. */
1638 if (uvc_register_video(dev) < 0)
1639 goto error;
1640
1641 /* Save our data pointer in the interface data. */
1642 usb_set_intfdata(intf, dev);
1643
1644 /* Initialize the interrupt URB. */
1645 if ((ret = uvc_status_init(dev)) < 0) {
1646 uvc_printk(KERN_INFO, "Unable to initialize the status "
1647 "endpoint (%d), status interrupt will not be "
1648 "supported.\n", ret);
1649 }
1650
1651 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1652 return 0;
1653
1654 error:
1655 kref_put(&dev->kref, uvc_delete);
1656 return -ENODEV;
1657 }
1658
1659 static void uvc_disconnect(struct usb_interface *intf)
1660 {
1661 struct uvc_device *dev = usb_get_intfdata(intf);
1662
1663 /* Set the USB interface data to NULL. This can be done outside the
1664 * lock, as there's no other reader.
1665 */
1666 usb_set_intfdata(intf, NULL);
1667
1668 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING)
1669 return;
1670
1671 /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide
1672 * lock is needed to prevent uvc_disconnect from releasing its
1673 * reference to the uvc_device instance after uvc_v4l2_open() received
1674 * the pointer to the device (video_devdata) but before it got the
1675 * chance to increase the reference count (kref_get).
1676 *
1677 * Note that the reference can't be released with the lock held,
1678 * otherwise a AB-BA deadlock can occur with videodev_lock that
1679 * videodev acquires in videodev_open() and video_unregister_device().
1680 */
1681 mutex_lock(&uvc_driver.open_mutex);
1682 dev->state |= UVC_DEV_DISCONNECTED;
1683 mutex_unlock(&uvc_driver.open_mutex);
1684
1685 kref_put(&dev->kref, uvc_delete);
1686 }
1687
1688 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1689 {
1690 struct uvc_device *dev = usb_get_intfdata(intf);
1691
1692 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1693 intf->cur_altsetting->desc.bInterfaceNumber);
1694
1695 /* Controls are cached on the fly so they don't need to be saved. */
1696 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL)
1697 return uvc_status_suspend(dev);
1698
1699 if (dev->video.streaming->intf != intf) {
1700 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
1701 "interface mismatch.\n");
1702 return -EINVAL;
1703 }
1704
1705 return uvc_video_suspend(&dev->video);
1706 }
1707
1708 static int __uvc_resume(struct usb_interface *intf, int reset)
1709 {
1710 struct uvc_device *dev = usb_get_intfdata(intf);
1711
1712 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1713 intf->cur_altsetting->desc.bInterfaceNumber);
1714
1715 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) {
1716 if (reset) {
1717 int ret = uvc_ctrl_resume_device(dev);
1718
1719 if (ret < 0)
1720 return ret;
1721 }
1722
1723 return uvc_status_resume(dev);
1724 }
1725
1726 if (dev->video.streaming->intf != intf) {
1727 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
1728 "interface mismatch.\n");
1729 return -EINVAL;
1730 }
1731
1732 return uvc_video_resume(&dev->video);
1733 }
1734
1735 static int uvc_resume(struct usb_interface *intf)
1736 {
1737 return __uvc_resume(intf, 0);
1738 }
1739
1740 static int uvc_reset_resume(struct usb_interface *intf)
1741 {
1742 return __uvc_resume(intf, 1);
1743 }
1744
1745 /* ------------------------------------------------------------------------
1746 * Driver initialization and cleanup
1747 */
1748
1749 /*
1750 * The Logitech cameras listed below have their interface class set to
1751 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1752 * though they are compliant.
1753 */
1754 static struct usb_device_id uvc_ids[] = {
1755 /* Microsoft Lifecam NX-6000 */
1756 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1757 | USB_DEVICE_ID_MATCH_INT_INFO,
1758 .idVendor = 0x045e,
1759 .idProduct = 0x00f8,
1760 .bInterfaceClass = USB_CLASS_VIDEO,
1761 .bInterfaceSubClass = 1,
1762 .bInterfaceProtocol = 0,
1763 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1764 /* Microsoft Lifecam VX-7000 */
1765 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1766 | USB_DEVICE_ID_MATCH_INT_INFO,
1767 .idVendor = 0x045e,
1768 .idProduct = 0x0723,
1769 .bInterfaceClass = USB_CLASS_VIDEO,
1770 .bInterfaceSubClass = 1,
1771 .bInterfaceProtocol = 0,
1772 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1773 /* Logitech Quickcam Fusion */
1774 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1775 | USB_DEVICE_ID_MATCH_INT_INFO,
1776 .idVendor = 0x046d,
1777 .idProduct = 0x08c1,
1778 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1779 .bInterfaceSubClass = 1,
1780 .bInterfaceProtocol = 0 },
1781 /* Logitech Quickcam Orbit MP */
1782 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1783 | USB_DEVICE_ID_MATCH_INT_INFO,
1784 .idVendor = 0x046d,
1785 .idProduct = 0x08c2,
1786 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1787 .bInterfaceSubClass = 1,
1788 .bInterfaceProtocol = 0 },
1789 /* Logitech Quickcam Pro for Notebook */
1790 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1791 | USB_DEVICE_ID_MATCH_INT_INFO,
1792 .idVendor = 0x046d,
1793 .idProduct = 0x08c3,
1794 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1795 .bInterfaceSubClass = 1,
1796 .bInterfaceProtocol = 0 },
1797 /* Logitech Quickcam Pro 5000 */
1798 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1799 | USB_DEVICE_ID_MATCH_INT_INFO,
1800 .idVendor = 0x046d,
1801 .idProduct = 0x08c5,
1802 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1803 .bInterfaceSubClass = 1,
1804 .bInterfaceProtocol = 0 },
1805 /* Logitech Quickcam OEM Dell Notebook */
1806 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1807 | USB_DEVICE_ID_MATCH_INT_INFO,
1808 .idVendor = 0x046d,
1809 .idProduct = 0x08c6,
1810 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1811 .bInterfaceSubClass = 1,
1812 .bInterfaceProtocol = 0 },
1813 /* Logitech Quickcam OEM Cisco VT Camera II */
1814 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1815 | USB_DEVICE_ID_MATCH_INT_INFO,
1816 .idVendor = 0x046d,
1817 .idProduct = 0x08c7,
1818 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1819 .bInterfaceSubClass = 1,
1820 .bInterfaceProtocol = 0 },
1821 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
1822 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1823 | USB_DEVICE_ID_MATCH_INT_INFO,
1824 .idVendor = 0x058f,
1825 .idProduct = 0x3820,
1826 .bInterfaceClass = USB_CLASS_VIDEO,
1827 .bInterfaceSubClass = 1,
1828 .bInterfaceProtocol = 0,
1829 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1830 /* Apple Built-In iSight */
1831 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1832 | USB_DEVICE_ID_MATCH_INT_INFO,
1833 .idVendor = 0x05ac,
1834 .idProduct = 0x8501,
1835 .bInterfaceClass = USB_CLASS_VIDEO,
1836 .bInterfaceSubClass = 1,
1837 .bInterfaceProtocol = 0,
1838 .driver_info = UVC_QUIRK_PROBE_MINMAX
1839 | UVC_QUIRK_BUILTIN_ISIGHT },
1840 /* Genesys Logic USB 2.0 PC Camera */
1841 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1842 | USB_DEVICE_ID_MATCH_INT_INFO,
1843 .idVendor = 0x05e3,
1844 .idProduct = 0x0505,
1845 .bInterfaceClass = USB_CLASS_VIDEO,
1846 .bInterfaceSubClass = 1,
1847 .bInterfaceProtocol = 0,
1848 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1849 /* ViMicro Vega */
1850 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1851 | USB_DEVICE_ID_MATCH_INT_INFO,
1852 .idVendor = 0x0ac8,
1853 .idProduct = 0x332d,
1854 .bInterfaceClass = USB_CLASS_VIDEO,
1855 .bInterfaceSubClass = 1,
1856 .bInterfaceProtocol = 0,
1857 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
1858 /* ViMicro - Minoru3D */
1859 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1860 | USB_DEVICE_ID_MATCH_INT_INFO,
1861 .idVendor = 0x0ac8,
1862 .idProduct = 0x3410,
1863 .bInterfaceClass = USB_CLASS_VIDEO,
1864 .bInterfaceSubClass = 1,
1865 .bInterfaceProtocol = 0,
1866 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
1867 /* ViMicro Venus - Minoru3D */
1868 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1869 | USB_DEVICE_ID_MATCH_INT_INFO,
1870 .idVendor = 0x0ac8,
1871 .idProduct = 0x3420,
1872 .bInterfaceClass = USB_CLASS_VIDEO,
1873 .bInterfaceSubClass = 1,
1874 .bInterfaceProtocol = 0,
1875 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
1876 /* MT6227 */
1877 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1878 | USB_DEVICE_ID_MATCH_INT_INFO,
1879 .idVendor = 0x0e8d,
1880 .idProduct = 0x0004,
1881 .bInterfaceClass = USB_CLASS_VIDEO,
1882 .bInterfaceSubClass = 1,
1883 .bInterfaceProtocol = 0,
1884 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1885 /* Syntek (HP Spartan) */
1886 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1887 | USB_DEVICE_ID_MATCH_INT_INFO,
1888 .idVendor = 0x174f,
1889 .idProduct = 0x5212,
1890 .bInterfaceClass = USB_CLASS_VIDEO,
1891 .bInterfaceSubClass = 1,
1892 .bInterfaceProtocol = 0,
1893 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1894 /* Syntek (Samsung Q310) */
1895 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1896 | USB_DEVICE_ID_MATCH_INT_INFO,
1897 .idVendor = 0x174f,
1898 .idProduct = 0x5931,
1899 .bInterfaceClass = USB_CLASS_VIDEO,
1900 .bInterfaceSubClass = 1,
1901 .bInterfaceProtocol = 0,
1902 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1903 /* Syntek (Asus F9SG) */
1904 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1905 | USB_DEVICE_ID_MATCH_INT_INFO,
1906 .idVendor = 0x174f,
1907 .idProduct = 0x8a31,
1908 .bInterfaceClass = USB_CLASS_VIDEO,
1909 .bInterfaceSubClass = 1,
1910 .bInterfaceProtocol = 0,
1911 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1912 /* Syntek (Asus U3S) */
1913 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1914 | USB_DEVICE_ID_MATCH_INT_INFO,
1915 .idVendor = 0x174f,
1916 .idProduct = 0x8a33,
1917 .bInterfaceClass = USB_CLASS_VIDEO,
1918 .bInterfaceSubClass = 1,
1919 .bInterfaceProtocol = 0,
1920 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1921 /* Syntek (JAOtech Smart Terminal) */
1922 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1923 | USB_DEVICE_ID_MATCH_INT_INFO,
1924 .idVendor = 0x174f,
1925 .idProduct = 0x8a34,
1926 .bInterfaceClass = USB_CLASS_VIDEO,
1927 .bInterfaceSubClass = 1,
1928 .bInterfaceProtocol = 0,
1929 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1930 /* Lenovo Thinkpad SL400/SL500 */
1931 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1932 | USB_DEVICE_ID_MATCH_INT_INFO,
1933 .idVendor = 0x17ef,
1934 .idProduct = 0x480b,
1935 .bInterfaceClass = USB_CLASS_VIDEO,
1936 .bInterfaceSubClass = 1,
1937 .bInterfaceProtocol = 0,
1938 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1939 /* Aveo Technology USB 2.0 Camera */
1940 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1941 | USB_DEVICE_ID_MATCH_INT_INFO,
1942 .idVendor = 0x1871,
1943 .idProduct = 0x0306,
1944 .bInterfaceClass = USB_CLASS_VIDEO,
1945 .bInterfaceSubClass = 1,
1946 .bInterfaceProtocol = 0,
1947 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1948 /* Ecamm Pico iMage */
1949 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1950 | USB_DEVICE_ID_MATCH_INT_INFO,
1951 .idVendor = 0x18cd,
1952 .idProduct = 0xcafe,
1953 .bInterfaceClass = USB_CLASS_VIDEO,
1954 .bInterfaceSubClass = 1,
1955 .bInterfaceProtocol = 0,
1956 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1957 /* FSC WebCam V30S */
1958 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1959 | USB_DEVICE_ID_MATCH_INT_INFO,
1960 .idVendor = 0x18ec,
1961 .idProduct = 0x3288,
1962 .bInterfaceClass = USB_CLASS_VIDEO,
1963 .bInterfaceSubClass = 1,
1964 .bInterfaceProtocol = 0,
1965 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1966 /* Bodelin ProScopeHR */
1967 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1968 | USB_DEVICE_ID_MATCH_DEV_HI
1969 | USB_DEVICE_ID_MATCH_INT_INFO,
1970 .idVendor = 0x19ab,
1971 .idProduct = 0x1000,
1972 .bcdDevice_hi = 0x0126,
1973 .bInterfaceClass = USB_CLASS_VIDEO,
1974 .bInterfaceSubClass = 1,
1975 .bInterfaceProtocol = 0,
1976 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
1977 /* SiGma Micro USB Web Camera */
1978 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1979 | USB_DEVICE_ID_MATCH_INT_INFO,
1980 .idVendor = 0x1c4f,
1981 .idProduct = 0x3000,
1982 .bInterfaceClass = USB_CLASS_VIDEO,
1983 .bInterfaceSubClass = 1,
1984 .bInterfaceProtocol = 0,
1985 .driver_info = UVC_QUIRK_PROBE_MINMAX
1986 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
1987 /* Generic USB Video Class */
1988 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
1989 {}
1990 };
1991
1992 MODULE_DEVICE_TABLE(usb, uvc_ids);
1993
1994 struct uvc_driver uvc_driver = {
1995 .driver = {
1996 .name = "uvcvideo",
1997 .probe = uvc_probe,
1998 .disconnect = uvc_disconnect,
1999 .suspend = uvc_suspend,
2000 .resume = uvc_resume,
2001 .reset_resume = uvc_reset_resume,
2002 .id_table = uvc_ids,
2003 .supports_autosuspend = 1,
2004 },
2005 };
2006
2007 static int __init uvc_init(void)
2008 {
2009 int result;
2010
2011 INIT_LIST_HEAD(&uvc_driver.devices);
2012 INIT_LIST_HEAD(&uvc_driver.controls);
2013 mutex_init(&uvc_driver.open_mutex);
2014 mutex_init(&uvc_driver.ctrl_mutex);
2015
2016 uvc_ctrl_init();
2017
2018 result = usb_register(&uvc_driver.driver);
2019 if (result == 0)
2020 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2021 return result;
2022 }
2023
2024 static void __exit uvc_cleanup(void)
2025 {
2026 usb_deregister(&uvc_driver.driver);
2027 }
2028
2029 module_init(uvc_init);
2030 module_exit(uvc_cleanup);
2031
2032 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2033 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2034 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2035 MODULE_PARM_DESC(quirks, "Forced device quirks");
2036 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2037 MODULE_PARM_DESC(trace, "Trace level bitmask");
2038 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2039 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2040
2041 MODULE_AUTHOR(DRIVER_AUTHOR);
2042 MODULE_DESCRIPTION(DRIVER_DESC);
2043 MODULE_LICENSE("GPL");
2044 MODULE_VERSION(DRIVER_VERSION);
2045
2046
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