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Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev
[linux/fpc-iii.git] / drivers / media / video / uvc / uvc_driver.c
blob04b47832fa0a5d1d416cdf429cf9e320a69fc59f
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
50 /* ------------------------------------------------------------------------
51 * Video formats
52 */
53
54 static struct uvc_format_desc uvc_fmts[] = {
55 {
56 .name = "YUV 4:2:2 (YUYV)",
57 .guid = UVC_GUID_FORMAT_YUY2,
58 .fcc = V4L2_PIX_FMT_YUYV,
59 },
60 {
61 .name = "YUV 4:2:0 (NV12)",
62 .guid = UVC_GUID_FORMAT_NV12,
63 .fcc = V4L2_PIX_FMT_NV12,
64 },
65 {
66 .name = "MJPEG",
67 .guid = UVC_GUID_FORMAT_MJPEG,
68 .fcc = V4L2_PIX_FMT_MJPEG,
69 },
70 {
71 .name = "YVU 4:2:0 (YV12)",
72 .guid = UVC_GUID_FORMAT_YV12,
73 .fcc = V4L2_PIX_FMT_YVU420,
74 },
75 {
76 .name = "YUV 4:2:0 (I420)",
77 .guid = UVC_GUID_FORMAT_I420,
78 .fcc = V4L2_PIX_FMT_YUV420,
79 },
80 {
81 .name = "YUV 4:2:2 (UYVY)",
82 .guid = UVC_GUID_FORMAT_UYVY,
83 .fcc = V4L2_PIX_FMT_UYVY,
84 },
85 {
86 .name = "Greyscale",
87 .guid = UVC_GUID_FORMAT_Y800,
88 .fcc = V4L2_PIX_FMT_GREY,
89 },
90 {
91 .name = "RGB Bayer",
92 .guid = UVC_GUID_FORMAT_BY8,
93 .fcc = V4L2_PIX_FMT_SBGGR8,
94 },
95 };
96
97 /* ------------------------------------------------------------------------
98 * Utility functions
99 */
100
101 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
102 __u8 epaddr)
103 {
104 struct usb_host_endpoint *ep;
105 unsigned int i;
106
107 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
108 ep = &alts->endpoint[i];
109 if (ep->desc.bEndpointAddress == epaddr)
110 return ep;
111 }
112
113 return NULL;
114 }
115
116 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
117 {
118 unsigned int len = ARRAY_SIZE(uvc_fmts);
119 unsigned int i;
120
121 for (i = 0; i < len; ++i) {
122 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
123 return &uvc_fmts[i];
124 }
125
126 return NULL;
127 }
128
129 static __u32 uvc_colorspace(const __u8 primaries)
130 {
131 static const __u8 colorprimaries[] = {
132 0,
133 V4L2_COLORSPACE_SRGB,
134 V4L2_COLORSPACE_470_SYSTEM_M,
135 V4L2_COLORSPACE_470_SYSTEM_BG,
136 V4L2_COLORSPACE_SMPTE170M,
137 V4L2_COLORSPACE_SMPTE240M,
138 };
139
140 if (primaries < ARRAY_SIZE(colorprimaries))
141 return colorprimaries[primaries];
142
143 return 0;
144 }
145
146 /* Simplify a fraction using a simple continued fraction decomposition. The
147 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
148 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
149 * arbitrary parameters to remove non-significative terms from the simple
150 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
151 * respectively seems to give nice results.
152 */
153 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
154 unsigned int n_terms, unsigned int threshold)
155 {
156 uint32_t *an;
157 uint32_t x, y, r;
158 unsigned int i, n;
159
160 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
161 if (an == NULL)
162 return;
163
164 /* Convert the fraction to a simple continued fraction. See
165 * http://mathforum.org/dr.math/faq/faq.fractions.html
166 * Stop if the current term is bigger than or equal to the given
167 * threshold.
168 */
169 x = *numerator;
170 y = *denominator;
171
172 for (n = 0; n < n_terms && y != 0; ++n) {
173 an[n] = x / y;
174 if (an[n] >= threshold) {
175 if (n < 2)
176 n++;
177 break;
178 }
179
180 r = x - an[n] * y;
181 x = y;
182 y = r;
183 }
184
185 /* Expand the simple continued fraction back to an integer fraction. */
186 x = 0;
187 y = 1;
188
189 for (i = n; i > 0; --i) {
190 r = y;
191 y = an[i-1] * y + x;
192 x = r;
193 }
194
195 *numerator = y;
196 *denominator = x;
197 kfree(an);
198 }
199
200 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
201 * to compute numerator / denominator * 10000000 using 32 bit fixed point
202 * arithmetic only.
203 */
204 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
205 {
206 uint32_t multiplier;
207
208 /* Saturate the result if the operation would overflow. */
209 if (denominator == 0 ||
210 numerator/denominator >= ((uint32_t)-1)/10000000)
211 return (uint32_t)-1;
212
213 /* Divide both the denominator and the multiplier by two until
214 * numerator * multiplier doesn't overflow. If anyone knows a better
215 * algorithm please let me know.
216 */
217 multiplier = 10000000;
218 while (numerator > ((uint32_t)-1)/multiplier) {
219 multiplier /= 2;
220 denominator /= 2;
221 }
222
223 return denominator ? numerator * multiplier / denominator : 0;
224 }
225
226 /* ------------------------------------------------------------------------
227 * Terminal and unit management
228 */
229
230 static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
231 {
232 struct uvc_entity *entity;
233
234 list_for_each_entry(entity, &dev->entities, list) {
235 if (entity->id == id)
236 return entity;
237 }
238
239 return NULL;
240 }
241
242 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
243 int id, struct uvc_entity *entity)
244 {
245 unsigned int i;
246
247 if (entity == NULL)
248 entity = list_entry(&dev->entities, struct uvc_entity, list);
249
250 list_for_each_entry_continue(entity, &dev->entities, list) {
251 switch (UVC_ENTITY_TYPE(entity)) {
252 case TT_STREAMING:
253 if (entity->output.bSourceID == id)
254 return entity;
255 break;
256
257 case VC_PROCESSING_UNIT:
258 if (entity->processing.bSourceID == id)
259 return entity;
260 break;
261
262 case VC_SELECTOR_UNIT:
263 for (i = 0; i < entity->selector.bNrInPins; ++i)
264 if (entity->selector.baSourceID[i] == id)
265 return entity;
266 break;
267
268 case VC_EXTENSION_UNIT:
269 for (i = 0; i < entity->extension.bNrInPins; ++i)
270 if (entity->extension.baSourceID[i] == id)
271 return entity;
272 break;
273 }
274 }
275
276 return NULL;
277 }
278
279 /* ------------------------------------------------------------------------
280 * Descriptors handling
281 */
282
283 static int uvc_parse_format(struct uvc_device *dev,
284 struct uvc_streaming *streaming, struct uvc_format *format,
285 __u32 **intervals, unsigned char *buffer, int buflen)
286 {
287 struct usb_interface *intf = streaming->intf;
288 struct usb_host_interface *alts = intf->cur_altsetting;
289 struct uvc_format_desc *fmtdesc;
290 struct uvc_frame *frame;
291 const unsigned char *start = buffer;
292 unsigned int interval;
293 unsigned int i, n;
294 __u8 ftype;
295
296 format->type = buffer[2];
297 format->index = buffer[3];
298
299 switch (buffer[2]) {
300 case VS_FORMAT_UNCOMPRESSED:
301 case VS_FORMAT_FRAME_BASED:
302 n = buffer[2] == VS_FORMAT_UNCOMPRESSED ? 27 : 28;
303 if (buflen < n) {
304 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
305 "interface %d FORMAT error\n",
306 dev->udev->devnum,
307 alts->desc.bInterfaceNumber);
308 return -EINVAL;
309 }
310
311 /* Find the format descriptor from its GUID. */
312 fmtdesc = uvc_format_by_guid(&buffer[5]);
313
314 if (fmtdesc != NULL) {
315 strlcpy(format->name, fmtdesc->name,
316 sizeof format->name);
317 format->fcc = fmtdesc->fcc;
318 } else {
319 uvc_printk(KERN_INFO, "Unknown video format "
320 UVC_GUID_FORMAT "\n",
321 UVC_GUID_ARGS(&buffer[5]));
322 snprintf(format->name, sizeof format->name,
323 UVC_GUID_FORMAT, UVC_GUID_ARGS(&buffer[5]));
324 format->fcc = 0;
325 }
326
327 format->bpp = buffer[21];
328 if (buffer[2] == VS_FORMAT_UNCOMPRESSED) {
329 ftype = VS_FRAME_UNCOMPRESSED;
330 } else {
331 ftype = VS_FRAME_FRAME_BASED;
332 if (buffer[27])
333 format->flags = UVC_FMT_FLAG_COMPRESSED;
334 }
335 break;
336
337 case VS_FORMAT_MJPEG:
338 if (buflen < 11) {
339 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
340 "interface %d FORMAT error\n",
341 dev->udev->devnum,
342 alts->desc.bInterfaceNumber);
343 return -EINVAL;
344 }
345
346 strlcpy(format->name, "MJPEG", sizeof format->name);
347 format->fcc = V4L2_PIX_FMT_MJPEG;
348 format->flags = UVC_FMT_FLAG_COMPRESSED;
349 format->bpp = 0;
350 ftype = VS_FRAME_MJPEG;
351 break;
352
353 case VS_FORMAT_DV:
354 if (buflen < 9) {
355 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
356 "interface %d FORMAT error\n",
357 dev->udev->devnum,
358 alts->desc.bInterfaceNumber);
359 return -EINVAL;
360 }
361
362 switch (buffer[8] & 0x7f) {
363 case 0:
364 strlcpy(format->name, "SD-DV", sizeof format->name);
365 break;
366 case 1:
367 strlcpy(format->name, "SDL-DV", sizeof format->name);
368 break;
369 case 2:
370 strlcpy(format->name, "HD-DV", sizeof format->name);
371 break;
372 default:
373 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
374 "interface %d: unknown DV format %u\n",
375 dev->udev->devnum,
376 alts->desc.bInterfaceNumber, buffer[8]);
377 return -EINVAL;
378 }
379
380 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
381 sizeof format->name);
382
383 format->fcc = V4L2_PIX_FMT_DV;
384 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
385 format->bpp = 0;
386 ftype = 0;
387
388 /* Create a dummy frame descriptor. */
389 frame = &format->frame[0];
390 memset(&format->frame[0], 0, sizeof format->frame[0]);
391 frame->bFrameIntervalType = 1;
392 frame->dwDefaultFrameInterval = 1;
393 frame->dwFrameInterval = *intervals;
394 *(*intervals)++ = 1;
395 format->nframes = 1;
396 break;
397
398 case VS_FORMAT_MPEG2TS:
399 case VS_FORMAT_STREAM_BASED:
400 /* Not supported yet. */
401 default:
402 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
403 "interface %d unsupported format %u\n",
404 dev->udev->devnum, alts->desc.bInterfaceNumber,
405 buffer[2]);
406 return -EINVAL;
407 }
408
409 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
410
411 buflen -= buffer[0];
412 buffer += buffer[0];
413
414 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
415 * based formats have frame descriptors.
416 */
417 while (buflen > 2 && buffer[2] == ftype) {
418 frame = &format->frame[format->nframes];
419 if (ftype != VS_FRAME_FRAME_BASED)
420 n = buflen > 25 ? buffer[25] : 0;
421 else
422 n = buflen > 21 ? buffer[21] : 0;
423
424 n = n ? n : 3;
425
426 if (buflen < 26 + 4*n) {
427 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
428 "interface %d FRAME error\n", dev->udev->devnum,
429 alts->desc.bInterfaceNumber);
430 return -EINVAL;
431 }
432
433 frame->bFrameIndex = buffer[3];
434 frame->bmCapabilities = buffer[4];
435 frame->wWidth = get_unaligned_le16(&buffer[5]);
436 frame->wHeight = get_unaligned_le16(&buffer[7]);
437 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
438 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
439 if (ftype != VS_FRAME_FRAME_BASED) {
440 frame->dwMaxVideoFrameBufferSize =
441 get_unaligned_le32(&buffer[17]);
442 frame->dwDefaultFrameInterval =
443 get_unaligned_le32(&buffer[21]);
444 frame->bFrameIntervalType = buffer[25];
445 } else {
446 frame->dwMaxVideoFrameBufferSize = 0;
447 frame->dwDefaultFrameInterval =
448 get_unaligned_le32(&buffer[17]);
449 frame->bFrameIntervalType = buffer[21];
450 }
451 frame->dwFrameInterval = *intervals;
452
453 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
454 * completely. Observed behaviours range from setting the
455 * value to 1.1x the actual frame size to hardwiring the
456 * 16 low bits to 0. This results in a higher than necessary
457 * memory usage as well as a wrong image size information. For
458 * uncompressed formats this can be fixed by computing the
459 * value from the frame size.
460 */
461 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
462 frame->dwMaxVideoFrameBufferSize = format->bpp
463 * frame->wWidth * frame->wHeight / 8;
464
465 /* Some bogus devices report dwMinFrameInterval equal to
466 * dwMaxFrameInterval and have dwFrameIntervalStep set to
467 * zero. Setting all null intervals to 1 fixes the problem and
468 * some other divisions by zero that could happen.
469 */
470 for (i = 0; i < n; ++i) {
471 interval = get_unaligned_le32(&buffer[26+4*i]);
472 *(*intervals)++ = interval ? interval : 1;
473 }
474
475 /* Make sure that the default frame interval stays between
476 * the boundaries.
477 */
478 n -= frame->bFrameIntervalType ? 1 : 2;
479 frame->dwDefaultFrameInterval =
480 min(frame->dwFrameInterval[n],
481 max(frame->dwFrameInterval[0],
482 frame->dwDefaultFrameInterval));
483
484 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
485 frame->wWidth, frame->wHeight,
486 10000000/frame->dwDefaultFrameInterval,
487 (100000000/frame->dwDefaultFrameInterval)%10);
488
489 format->nframes++;
490 buflen -= buffer[0];
491 buffer += buffer[0];
492 }
493
494 if (buflen > 2 && buffer[2] == VS_STILL_IMAGE_FRAME) {
495 buflen -= buffer[0];
496 buffer += buffer[0];
497 }
498
499 if (buflen > 2 && buffer[2] == VS_COLORFORMAT) {
500 if (buflen < 6) {
501 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
502 "interface %d COLORFORMAT error\n",
503 dev->udev->devnum,
504 alts->desc.bInterfaceNumber);
505 return -EINVAL;
506 }
507
508 format->colorspace = uvc_colorspace(buffer[3]);
509
510 buflen -= buffer[0];
511 buffer += buffer[0];
512 }
513
514 return buffer - start;
515 }
516
517 static int uvc_parse_streaming(struct uvc_device *dev,
518 struct usb_interface *intf)
519 {
520 struct uvc_streaming *streaming = NULL;
521 struct uvc_format *format;
522 struct uvc_frame *frame;
523 struct usb_host_interface *alts = &intf->altsetting[0];
524 unsigned char *_buffer, *buffer = alts->extra;
525 int _buflen, buflen = alts->extralen;
526 unsigned int nformats = 0, nframes = 0, nintervals = 0;
527 unsigned int size, i, n, p;
528 __u32 *interval;
529 __u16 psize;
530 int ret = -EINVAL;
531
532 if (intf->cur_altsetting->desc.bInterfaceSubClass
533 != SC_VIDEOSTREAMING) {
534 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
535 "video streaming interface\n", dev->udev->devnum,
536 intf->altsetting[0].desc.bInterfaceNumber);
537 return -EINVAL;
538 }
539
540 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
541 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
542 "claimed\n", dev->udev->devnum,
543 intf->altsetting[0].desc.bInterfaceNumber);
544 return -EINVAL;
545 }
546
547 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
548 if (streaming == NULL) {
549 usb_driver_release_interface(&uvc_driver.driver, intf);
550 return -EINVAL;
551 }
552
553 mutex_init(&streaming->mutex);
554 streaming->intf = usb_get_intf(intf);
555 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
556
557 /* The Pico iMage webcam has its class-specific interface descriptors
558 * after the endpoint descriptors.
559 */
560 if (buflen == 0) {
561 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
562 struct usb_host_endpoint *ep = &alts->endpoint[i];
563
564 if (ep->extralen == 0)
565 continue;
566
567 if (ep->extralen > 2 &&
568 ep->extra[1] == USB_DT_CS_INTERFACE) {
569 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
570 "from endpoint %u.\n", i);
571 buffer = alts->endpoint[i].extra;
572 buflen = alts->endpoint[i].extralen;
573 break;
574 }
575 }
576 }
577
578 /* Skip the standard interface descriptors. */
579 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
580 buflen -= buffer[0];
581 buffer += buffer[0];
582 }
583
584 if (buflen <= 2) {
585 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
586 "interface descriptors found.\n");
587 goto error;
588 }
589
590 /* Parse the header descriptor. */
591 switch (buffer[2]) {
592 case VS_OUTPUT_HEADER:
593 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
594 size = 9;
595 break;
596
597 case VS_INPUT_HEADER:
598 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
599 size = 13;
600 break;
601
602 default:
603 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
604 "%d HEADER descriptor not found.\n", dev->udev->devnum,
605 alts->desc.bInterfaceNumber);
606 goto error;
607 }
608
609 p = buflen >= 4 ? buffer[3] : 0;
610 n = buflen >= size ? buffer[size-1] : 0;
611
612 if (buflen < size + p*n) {
613 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
614 "interface %d HEADER descriptor is invalid.\n",
615 dev->udev->devnum, alts->desc.bInterfaceNumber);
616 goto error;
617 }
618
619 streaming->header.bNumFormats = p;
620 streaming->header.bEndpointAddress = buffer[6];
621 if (buffer[2] == VS_INPUT_HEADER) {
622 streaming->header.bmInfo = buffer[7];
623 streaming->header.bTerminalLink = buffer[8];
624 streaming->header.bStillCaptureMethod = buffer[9];
625 streaming->header.bTriggerSupport = buffer[10];
626 streaming->header.bTriggerUsage = buffer[11];
627 } else {
628 streaming->header.bTerminalLink = buffer[7];
629 }
630 streaming->header.bControlSize = n;
631
632 streaming->header.bmaControls = kmalloc(p*n, GFP_KERNEL);
633 if (streaming->header.bmaControls == NULL) {
634 ret = -ENOMEM;
635 goto error;
636 }
637
638 memcpy(streaming->header.bmaControls, &buffer[size], p*n);
639
640 buflen -= buffer[0];
641 buffer += buffer[0];
642
643 _buffer = buffer;
644 _buflen = buflen;
645
646 /* Count the format and frame descriptors. */
647 while (_buflen > 2 && _buffer[1] == CS_INTERFACE) {
648 switch (_buffer[2]) {
649 case VS_FORMAT_UNCOMPRESSED:
650 case VS_FORMAT_MJPEG:
651 case VS_FORMAT_FRAME_BASED:
652 nformats++;
653 break;
654
655 case VS_FORMAT_DV:
656 /* DV format has no frame descriptor. We will create a
657 * dummy frame descriptor with a dummy frame interval.
658 */
659 nformats++;
660 nframes++;
661 nintervals++;
662 break;
663
664 case VS_FORMAT_MPEG2TS:
665 case VS_FORMAT_STREAM_BASED:
666 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
667 "interface %d FORMAT %u is not supported.\n",
668 dev->udev->devnum,
669 alts->desc.bInterfaceNumber, _buffer[2]);
670 break;
671
672 case VS_FRAME_UNCOMPRESSED:
673 case VS_FRAME_MJPEG:
674 nframes++;
675 if (_buflen > 25)
676 nintervals += _buffer[25] ? _buffer[25] : 3;
677 break;
678
679 case VS_FRAME_FRAME_BASED:
680 nframes++;
681 if (_buflen > 21)
682 nintervals += _buffer[21] ? _buffer[21] : 3;
683 break;
684 }
685
686 _buflen -= _buffer[0];
687 _buffer += _buffer[0];
688 }
689
690 if (nformats == 0) {
691 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
692 "%d has no supported formats defined.\n",
693 dev->udev->devnum, alts->desc.bInterfaceNumber);
694 goto error;
695 }
696
697 size = nformats * sizeof *format + nframes * sizeof *frame
698 + nintervals * sizeof *interval;
699 format = kzalloc(size, GFP_KERNEL);
700 if (format == NULL) {
701 ret = -ENOMEM;
702 goto error;
703 }
704
705 frame = (struct uvc_frame *)&format[nformats];
706 interval = (__u32 *)&frame[nframes];
707
708 streaming->format = format;
709 streaming->nformats = nformats;
710
711 /* Parse the format descriptors. */
712 while (buflen > 2 && buffer[1] == CS_INTERFACE) {
713 switch (buffer[2]) {
714 case VS_FORMAT_UNCOMPRESSED:
715 case VS_FORMAT_MJPEG:
716 case VS_FORMAT_DV:
717 case VS_FORMAT_FRAME_BASED:
718 format->frame = frame;
719 ret = uvc_parse_format(dev, streaming, format,
720 &interval, buffer, buflen);
721 if (ret < 0)
722 goto error;
723
724 frame += format->nframes;
725 format++;
726
727 buflen -= ret;
728 buffer += ret;
729 continue;
730
731 default:
732 break;
733 }
734
735 buflen -= buffer[0];
736 buffer += buffer[0];
737 }
738
739 /* Parse the alternate settings to find the maximum bandwidth. */
740 for (i = 0; i < intf->num_altsetting; ++i) {
741 struct usb_host_endpoint *ep;
742 alts = &intf->altsetting[i];
743 ep = uvc_find_endpoint(alts,
744 streaming->header.bEndpointAddress);
745 if (ep == NULL)
746 continue;
747
748 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
749 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
750 if (psize > streaming->maxpsize)
751 streaming->maxpsize = psize;
752 }
753
754 list_add_tail(&streaming->list, &dev->streaming);
755 return 0;
756
757 error:
758 usb_driver_release_interface(&uvc_driver.driver, intf);
759 usb_put_intf(intf);
760 kfree(streaming->format);
761 kfree(streaming->header.bmaControls);
762 kfree(streaming);
763 return ret;
764 }
765
766 /* Parse vendor-specific extensions. */
767 static int uvc_parse_vendor_control(struct uvc_device *dev,
768 const unsigned char *buffer, int buflen)
769 {
770 struct usb_device *udev = dev->udev;
771 struct usb_host_interface *alts = dev->intf->cur_altsetting;
772 struct uvc_entity *unit;
773 unsigned int n, p;
774 int handled = 0;
775
776 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
777 case 0x046d: /* Logitech */
778 if (buffer[1] != 0x41 || buffer[2] != 0x01)
779 break;
780
781 /* Logitech implements several vendor specific functions
782 * through vendor specific extension units (LXU).
783 *
784 * The LXU descriptors are similar to XU descriptors
785 * (see "USB Device Video Class for Video Devices", section
786 * 3.7.2.6 "Extension Unit Descriptor") with the following
787 * differences:
788 *
789 * ----------------------------------------------------------
790 * 0 bLength 1 Number
791 * Size of this descriptor, in bytes: 24+p+n*2
792 * ----------------------------------------------------------
793 * 23+p+n bmControlsType N Bitmap
794 * Individual bits in the set are defined:
795 * 0: Absolute
796 * 1: Relative
797 *
798 * This bitset is mapped exactly the same as bmControls.
799 * ----------------------------------------------------------
800 * 23+p+n*2 bReserved 1 Boolean
801 * ----------------------------------------------------------
802 * 24+p+n*2 iExtension 1 Index
803 * Index of a string descriptor that describes this
804 * extension unit.
805 * ----------------------------------------------------------
806 */
807 p = buflen >= 22 ? buffer[21] : 0;
808 n = buflen >= 25 + p ? buffer[22+p] : 0;
809
810 if (buflen < 25 + p + 2*n) {
811 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
812 "interface %d EXTENSION_UNIT error\n",
813 udev->devnum, alts->desc.bInterfaceNumber);
814 break;
815 }
816
817 unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL);
818 if (unit == NULL)
819 return -ENOMEM;
820
821 unit->id = buffer[3];
822 unit->type = VC_EXTENSION_UNIT;
823 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
824 unit->extension.bNumControls = buffer[20];
825 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
826 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
827 memcpy(unit->extension.baSourceID, &buffer[22], p);
828 unit->extension.bControlSize = buffer[22+p];
829 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
830 unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit
831 + p + n;
832 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
833
834 if (buffer[24+p+2*n] != 0)
835 usb_string(udev, buffer[24+p+2*n], unit->name,
836 sizeof unit->name);
837 else
838 sprintf(unit->name, "Extension %u", buffer[3]);
839
840 list_add_tail(&unit->list, &dev->entities);
841 handled = 1;
842 break;
843 }
844
845 return handled;
846 }
847
848 static int uvc_parse_standard_control(struct uvc_device *dev,
849 const unsigned char *buffer, int buflen)
850 {
851 struct usb_device *udev = dev->udev;
852 struct uvc_entity *unit, *term;
853 struct usb_interface *intf;
854 struct usb_host_interface *alts = dev->intf->cur_altsetting;
855 unsigned int i, n, p, len;
856 __u16 type;
857
858 switch (buffer[2]) {
859 case VC_HEADER:
860 n = buflen >= 12 ? buffer[11] : 0;
861
862 if (buflen < 12 || buflen < 12 + n) {
863 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
864 "interface %d HEADER error\n", udev->devnum,
865 alts->desc.bInterfaceNumber);
866 return -EINVAL;
867 }
868
869 dev->uvc_version = get_unaligned_le16(&buffer[3]);
870 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
871
872 /* Parse all USB Video Streaming interfaces. */
873 for (i = 0; i < n; ++i) {
874 intf = usb_ifnum_to_if(udev, buffer[12+i]);
875 if (intf == NULL) {
876 uvc_trace(UVC_TRACE_DESCR, "device %d "
877 "interface %d doesn't exists\n",
878 udev->devnum, i);
879 continue;
880 }
881
882 uvc_parse_streaming(dev, intf);
883 }
884 break;
885
886 case VC_INPUT_TERMINAL:
887 if (buflen < 8) {
888 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
889 "interface %d INPUT_TERMINAL error\n",
890 udev->devnum, alts->desc.bInterfaceNumber);
891 return -EINVAL;
892 }
893
894 /* Make sure the terminal type MSB is not null, otherwise it
895 * could be confused with a unit.
896 */
897 type = get_unaligned_le16(&buffer[4]);
898 if ((type & 0xff00) == 0) {
899 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
900 "interface %d INPUT_TERMINAL %d has invalid "
901 "type 0x%04x, skipping\n", udev->devnum,
902 alts->desc.bInterfaceNumber,
903 buffer[3], type);
904 return 0;
905 }
906
907 n = 0;
908 p = 0;
909 len = 8;
910
911 if (type == ITT_CAMERA) {
912 n = buflen >= 15 ? buffer[14] : 0;
913 len = 15;
914
915 } else if (type == ITT_MEDIA_TRANSPORT_INPUT) {
916 n = buflen >= 9 ? buffer[8] : 0;
917 p = buflen >= 10 + n ? buffer[9+n] : 0;
918 len = 10;
919 }
920
921 if (buflen < len + n + p) {
922 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
923 "interface %d INPUT_TERMINAL error\n",
924 udev->devnum, alts->desc.bInterfaceNumber);
925 return -EINVAL;
926 }
927
928 term = kzalloc(sizeof *term + n + p, GFP_KERNEL);
929 if (term == NULL)
930 return -ENOMEM;
931
932 term->id = buffer[3];
933 term->type = type | UVC_TERM_INPUT;
934
935 if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) {
936 term->camera.bControlSize = n;
937 term->camera.bmControls = (__u8 *)term + sizeof *term;
938 term->camera.wObjectiveFocalLengthMin =
939 get_unaligned_le16(&buffer[8]);
940 term->camera.wObjectiveFocalLengthMax =
941 get_unaligned_le16(&buffer[10]);
942 term->camera.wOcularFocalLength =
943 get_unaligned_le16(&buffer[12]);
944 memcpy(term->camera.bmControls, &buffer[15], n);
945 } else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) {
946 term->media.bControlSize = n;
947 term->media.bmControls = (__u8 *)term + sizeof *term;
948 term->media.bTransportModeSize = p;
949 term->media.bmTransportModes = (__u8 *)term
950 + sizeof *term + n;
951 memcpy(term->media.bmControls, &buffer[9], n);
952 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
953 }
954
955 if (buffer[7] != 0)
956 usb_string(udev, buffer[7], term->name,
957 sizeof term->name);
958 else if (UVC_ENTITY_TYPE(term) == ITT_CAMERA)
959 sprintf(term->name, "Camera %u", buffer[3]);
960 else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT)
961 sprintf(term->name, "Media %u", buffer[3]);
962 else
963 sprintf(term->name, "Input %u", buffer[3]);
964
965 list_add_tail(&term->list, &dev->entities);
966 break;
967
968 case VC_OUTPUT_TERMINAL:
969 if (buflen < 9) {
970 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
971 "interface %d OUTPUT_TERMINAL error\n",
972 udev->devnum, alts->desc.bInterfaceNumber);
973 return -EINVAL;
974 }
975
976 /* Make sure the terminal type MSB is not null, otherwise it
977 * could be confused with a unit.
978 */
979 type = get_unaligned_le16(&buffer[4]);
980 if ((type & 0xff00) == 0) {
981 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
982 "interface %d OUTPUT_TERMINAL %d has invalid "
983 "type 0x%04x, skipping\n", udev->devnum,
984 alts->desc.bInterfaceNumber, buffer[3], type);
985 return 0;
986 }
987
988 term = kzalloc(sizeof *term, GFP_KERNEL);
989 if (term == NULL)
990 return -ENOMEM;
991
992 term->id = buffer[3];
993 term->type = type | UVC_TERM_OUTPUT;
994 term->output.bSourceID = buffer[7];
995
996 if (buffer[8] != 0)
997 usb_string(udev, buffer[8], term->name,
998 sizeof term->name);
999 else
1000 sprintf(term->name, "Output %u", buffer[3]);
1001
1002 list_add_tail(&term->list, &dev->entities);
1003 break;
1004
1005 case VC_SELECTOR_UNIT:
1006 p = buflen >= 5 ? buffer[4] : 0;
1007
1008 if (buflen < 5 || buflen < 6 + p) {
1009 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1010 "interface %d SELECTOR_UNIT error\n",
1011 udev->devnum, alts->desc.bInterfaceNumber);
1012 return -EINVAL;
1013 }
1014
1015 unit = kzalloc(sizeof *unit + p, GFP_KERNEL);
1016 if (unit == NULL)
1017 return -ENOMEM;
1018
1019 unit->id = buffer[3];
1020 unit->type = buffer[2];
1021 unit->selector.bNrInPins = buffer[4];
1022 unit->selector.baSourceID = (__u8 *)unit + sizeof *unit;
1023 memcpy(unit->selector.baSourceID, &buffer[5], p);
1024
1025 if (buffer[5+p] != 0)
1026 usb_string(udev, buffer[5+p], unit->name,
1027 sizeof unit->name);
1028 else
1029 sprintf(unit->name, "Selector %u", buffer[3]);
1030
1031 list_add_tail(&unit->list, &dev->entities);
1032 break;
1033
1034 case VC_PROCESSING_UNIT:
1035 n = buflen >= 8 ? buffer[7] : 0;
1036 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1037
1038 if (buflen < p + n) {
1039 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1040 "interface %d PROCESSING_UNIT error\n",
1041 udev->devnum, alts->desc.bInterfaceNumber);
1042 return -EINVAL;
1043 }
1044
1045 unit = kzalloc(sizeof *unit + n, GFP_KERNEL);
1046 if (unit == NULL)
1047 return -ENOMEM;
1048
1049 unit->id = buffer[3];
1050 unit->type = buffer[2];
1051 unit->processing.bSourceID = buffer[4];
1052 unit->processing.wMaxMultiplier =
1053 get_unaligned_le16(&buffer[5]);
1054 unit->processing.bControlSize = buffer[7];
1055 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1056 memcpy(unit->processing.bmControls, &buffer[8], n);
1057 if (dev->uvc_version >= 0x0110)
1058 unit->processing.bmVideoStandards = buffer[9+n];
1059
1060 if (buffer[8+n] != 0)
1061 usb_string(udev, buffer[8+n], unit->name,
1062 sizeof unit->name);
1063 else
1064 sprintf(unit->name, "Processing %u", buffer[3]);
1065
1066 list_add_tail(&unit->list, &dev->entities);
1067 break;
1068
1069 case VC_EXTENSION_UNIT:
1070 p = buflen >= 22 ? buffer[21] : 0;
1071 n = buflen >= 24 + p ? buffer[22+p] : 0;
1072
1073 if (buflen < 24 + p + n) {
1074 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1075 "interface %d EXTENSION_UNIT error\n",
1076 udev->devnum, alts->desc.bInterfaceNumber);
1077 return -EINVAL;
1078 }
1079
1080 unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL);
1081 if (unit == NULL)
1082 return -ENOMEM;
1083
1084 unit->id = buffer[3];
1085 unit->type = buffer[2];
1086 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1087 unit->extension.bNumControls = buffer[20];
1088 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
1089 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
1090 memcpy(unit->extension.baSourceID, &buffer[22], p);
1091 unit->extension.bControlSize = buffer[22+p];
1092 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
1093 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1094
1095 if (buffer[23+p+n] != 0)
1096 usb_string(udev, buffer[23+p+n], unit->name,
1097 sizeof unit->name);
1098 else
1099 sprintf(unit->name, "Extension %u", buffer[3]);
1100
1101 list_add_tail(&unit->list, &dev->entities);
1102 break;
1103
1104 default:
1105 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1106 "descriptor (%u)\n", buffer[2]);
1107 break;
1108 }
1109
1110 return 0;
1111 }
1112
1113 static int uvc_parse_control(struct uvc_device *dev)
1114 {
1115 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1116 unsigned char *buffer = alts->extra;
1117 int buflen = alts->extralen;
1118 int ret;
1119
1120 /* Parse the default alternate setting only, as the UVC specification
1121 * defines a single alternate setting, the default alternate setting
1122 * zero.
1123 */
1124
1125 while (buflen > 2) {
1126 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1127 buffer[1] != USB_DT_CS_INTERFACE)
1128 goto next_descriptor;
1129
1130 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1131 return ret;
1132
1133 next_descriptor:
1134 buflen -= buffer[0];
1135 buffer += buffer[0];
1136 }
1137
1138 /* Check if the optional status endpoint is present. Built-in iSight
1139 * webcams have an interrupt endpoint but spit proprietary data that
1140 * don't conform to the UVC status endpoint messages. Don't try to
1141 * handle the interrupt endpoint for those cameras.
1142 */
1143 if (alts->desc.bNumEndpoints == 1 &&
1144 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1145 struct usb_host_endpoint *ep = &alts->endpoint[0];
1146 struct usb_endpoint_descriptor *desc = &ep->desc;
1147
1148 if (usb_endpoint_is_int_in(desc) &&
1149 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1150 desc->bInterval != 0) {
1151 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1152 "(addr %02x).\n", desc->bEndpointAddress);
1153 dev->int_ep = ep;
1154 }
1155 }
1156
1157 return 0;
1158 }
1159
1160 /* ------------------------------------------------------------------------
1161 * USB probe and disconnect
1162 */
1163
1164 /*
1165 * Unregister the video devices.
1166 */
1167 static void uvc_unregister_video(struct uvc_device *dev)
1168 {
1169 if (dev->video.vdev) {
1170 if (dev->video.vdev->minor == -1)
1171 video_device_release(dev->video.vdev);
1172 else
1173 video_unregister_device(dev->video.vdev);
1174 dev->video.vdev = NULL;
1175 }
1176 }
1177
1178 /*
1179 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1180 * and containing the following units:
1181 *
1182 * - one Output Terminal (USB Streaming or Display)
1183 * - zero or one Processing Unit
1184 * - zero, one or mode single-input Selector Units
1185 * - zero or one multiple-input Selector Units, provided all inputs are
1186 * connected to input terminals
1187 * - zero, one or mode single-input Extension Units
1188 * - one or more Input Terminals (Camera, External or USB Streaming)
1189 *
1190 * A side forward scan is made on each detected entity to check for additional
1191 * extension units.
1192 */
1193 static int uvc_scan_chain_entity(struct uvc_video_device *video,
1194 struct uvc_entity *entity)
1195 {
1196 switch (UVC_ENTITY_TYPE(entity)) {
1197 case VC_EXTENSION_UNIT:
1198 if (uvc_trace_param & UVC_TRACE_PROBE)
1199 printk(" <- XU %d", entity->id);
1200
1201 if (entity->extension.bNrInPins != 1) {
1202 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1203 "than 1 input pin.\n", entity->id);
1204 return -1;
1205 }
1206
1207 list_add_tail(&entity->chain, &video->extensions);
1208 break;
1209
1210 case VC_PROCESSING_UNIT:
1211 if (uvc_trace_param & UVC_TRACE_PROBE)
1212 printk(" <- PU %d", entity->id);
1213
1214 if (video->processing != NULL) {
1215 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1216 "Processing Units in chain.\n");
1217 return -1;
1218 }
1219
1220 video->processing = entity;
1221 break;
1222
1223 case VC_SELECTOR_UNIT:
1224 if (uvc_trace_param & UVC_TRACE_PROBE)
1225 printk(" <- SU %d", entity->id);
1226
1227 /* Single-input selector units are ignored. */
1228 if (entity->selector.bNrInPins == 1)
1229 break;
1230
1231 if (video->selector != NULL) {
1232 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1233 "Units in chain.\n");
1234 return -1;
1235 }
1236
1237 video->selector = entity;
1238 break;
1239
1240 case ITT_VENDOR_SPECIFIC:
1241 case ITT_CAMERA:
1242 case ITT_MEDIA_TRANSPORT_INPUT:
1243 if (uvc_trace_param & UVC_TRACE_PROBE)
1244 printk(" <- IT %d\n", entity->id);
1245
1246 list_add_tail(&entity->chain, &video->iterms);
1247 break;
1248
1249 case TT_STREAMING:
1250 if (uvc_trace_param & UVC_TRACE_PROBE)
1251 printk(" <- IT %d\n", entity->id);
1252
1253 if (!UVC_ENTITY_IS_ITERM(entity)) {
1254 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1255 "terminal %u.\n", entity->id);
1256 return -1;
1257 }
1258
1259 if (video->sterm != NULL) {
1260 uvc_trace(UVC_TRACE_DESCR, "Found multiple streaming "
1261 "entities in chain.\n");
1262 return -1;
1263 }
1264
1265 list_add_tail(&entity->chain, &video->iterms);
1266 video->sterm = entity;
1267 break;
1268
1269 default:
1270 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1271 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1272 return -1;
1273 }
1274
1275 return 0;
1276 }
1277
1278 static int uvc_scan_chain_forward(struct uvc_video_device *video,
1279 struct uvc_entity *entity, struct uvc_entity *prev)
1280 {
1281 struct uvc_entity *forward;
1282 int found;
1283
1284 /* Forward scan */
1285 forward = NULL;
1286 found = 0;
1287
1288 while (1) {
1289 forward = uvc_entity_by_reference(video->dev, entity->id,
1290 forward);
1291 if (forward == NULL)
1292 break;
1293
1294 if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT ||
1295 forward == prev)
1296 continue;
1297
1298 if (forward->extension.bNrInPins != 1) {
1299 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has "
1300 "more than 1 input pin.\n", entity->id);
1301 return -1;
1302 }
1303
1304 list_add_tail(&forward->chain, &video->extensions);
1305 if (uvc_trace_param & UVC_TRACE_PROBE) {
1306 if (!found)
1307 printk(" (-> XU");
1308
1309 printk(" %d", forward->id);
1310 found = 1;
1311 }
1312 }
1313 if (found)
1314 printk(")");
1315
1316 return 0;
1317 }
1318
1319 static int uvc_scan_chain_backward(struct uvc_video_device *video,
1320 struct uvc_entity *entity)
1321 {
1322 struct uvc_entity *term;
1323 int id = -1, i;
1324
1325 switch (UVC_ENTITY_TYPE(entity)) {
1326 case VC_EXTENSION_UNIT:
1327 id = entity->extension.baSourceID[0];
1328 break;
1329
1330 case VC_PROCESSING_UNIT:
1331 id = entity->processing.bSourceID;
1332 break;
1333
1334 case VC_SELECTOR_UNIT:
1335 /* Single-input selector units are ignored. */
1336 if (entity->selector.bNrInPins == 1) {
1337 id = entity->selector.baSourceID[0];
1338 break;
1339 }
1340
1341 if (uvc_trace_param & UVC_TRACE_PROBE)
1342 printk(" <- IT");
1343
1344 video->selector = entity;
1345 for (i = 0; i < entity->selector.bNrInPins; ++i) {
1346 id = entity->selector.baSourceID[i];
1347 term = uvc_entity_by_id(video->dev, id);
1348 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1349 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1350 "input %d isn't connected to an "
1351 "input terminal\n", entity->id, i);
1352 return -1;
1353 }
1354
1355 if (uvc_trace_param & UVC_TRACE_PROBE)
1356 printk(" %d", term->id);
1357
1358 list_add_tail(&term->chain, &video->iterms);
1359 uvc_scan_chain_forward(video, term, entity);
1360 }
1361
1362 if (uvc_trace_param & UVC_TRACE_PROBE)
1363 printk("\n");
1364
1365 id = 0;
1366 break;
1367 }
1368
1369 return id;
1370 }
1371
1372 static int uvc_scan_chain(struct uvc_video_device *video)
1373 {
1374 struct uvc_entity *entity, *prev;
1375 int id;
1376
1377 entity = video->oterm;
1378 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id);
1379
1380 if (UVC_ENTITY_TYPE(entity) == TT_STREAMING)
1381 video->sterm = entity;
1382
1383 id = entity->output.bSourceID;
1384 while (id != 0) {
1385 prev = entity;
1386 entity = uvc_entity_by_id(video->dev, id);
1387 if (entity == NULL) {
1388 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1389 "unknown entity %d.\n", id);
1390 return -1;
1391 }
1392
1393 /* Process entity */
1394 if (uvc_scan_chain_entity(video, entity) < 0)
1395 return -1;
1396
1397 /* Forward scan */
1398 if (uvc_scan_chain_forward(video, entity, prev) < 0)
1399 return -1;
1400
1401 /* Stop when a terminal is found. */
1402 if (!UVC_ENTITY_IS_UNIT(entity))
1403 break;
1404
1405 /* Backward scan */
1406 id = uvc_scan_chain_backward(video, entity);
1407 if (id < 0)
1408 return id;
1409 }
1410
1411 if (video->sterm == NULL) {
1412 uvc_trace(UVC_TRACE_DESCR, "No streaming entity found in "
1413 "chain.\n");
1414 return -1;
1415 }
1416
1417 return 0;
1418 }
1419
1420 /*
1421 * Register the video devices.
1422 *
1423 * The driver currently supports a single video device per control interface
1424 * only. The terminal and units must match the following structure:
1425 *
1426 * ITT_* -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING
1427 * TT_STREAMING -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> OTT_*
1428 *
1429 * The Extension Units, if present, must have a single input pin. The
1430 * Processing Unit and Extension Units can be in any order. Additional
1431 * Extension Units connected to the main chain as single-unit branches are
1432 * also supported.
1433 */
1434 static int uvc_register_video(struct uvc_device *dev)
1435 {
1436 struct video_device *vdev;
1437 struct uvc_entity *term;
1438 int found = 0, ret;
1439
1440 /* Check if the control interface matches the structure we expect. */
1441 list_for_each_entry(term, &dev->entities, list) {
1442 struct uvc_streaming *streaming;
1443
1444 if (!UVC_ENTITY_IS_TERM(term) || !UVC_ENTITY_IS_OTERM(term))
1445 continue;
1446
1447 memset(&dev->video, 0, sizeof dev->video);
1448 mutex_init(&dev->video.ctrl_mutex);
1449 INIT_LIST_HEAD(&dev->video.iterms);
1450 INIT_LIST_HEAD(&dev->video.extensions);
1451 dev->video.oterm = term;
1452 dev->video.dev = dev;
1453 if (uvc_scan_chain(&dev->video) < 0)
1454 continue;
1455
1456 list_for_each_entry(streaming, &dev->streaming, list) {
1457 if (streaming->header.bTerminalLink ==
1458 dev->video.sterm->id) {
1459 dev->video.streaming = streaming;
1460 found = 1;
1461 break;
1462 }
1463 }
1464
1465 if (found)
1466 break;
1467 }
1468
1469 if (!found) {
1470 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1471 return -1;
1472 }
1473
1474 if (uvc_trace_param & UVC_TRACE_PROBE) {
1475 uvc_printk(KERN_INFO, "Found a valid video chain (");
1476 list_for_each_entry(term, &dev->video.iterms, chain) {
1477 printk("%d", term->id);
1478 if (term->chain.next != &dev->video.iterms)
1479 printk(",");
1480 }
1481 printk(" -> %d).\n", dev->video.oterm->id);
1482 }
1483
1484 /* Initialize the video buffers queue. */
1485 uvc_queue_init(&dev->video.queue, dev->video.streaming->type);
1486
1487 /* Initialize the streaming interface with default streaming
1488 * parameters.
1489 */
1490 if ((ret = uvc_video_init(&dev->video)) < 0) {
1491 uvc_printk(KERN_ERR, "Failed to initialize the device "
1492 "(%d).\n", ret);
1493 return ret;
1494 }
1495
1496 /* Register the device with V4L. */
1497 vdev = video_device_alloc();
1498 if (vdev == NULL)
1499 return -1;
1500
1501 /* We already hold a reference to dev->udev. The video device will be
1502 * unregistered before the reference is released, so we don't need to
1503 * get another one.
1504 */
1505 vdev->parent = &dev->intf->dev;
1506 vdev->minor = -1;
1507 vdev->fops = &uvc_fops;
1508 vdev->release = video_device_release;
1509 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1510
1511 /* Set the driver data before calling video_register_device, otherwise
1512 * uvc_v4l2_open might race us.
1513 */
1514 dev->video.vdev = vdev;
1515 video_set_drvdata(vdev, &dev->video);
1516
1517 if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
1518 dev->video.vdev = NULL;
1519 video_device_release(vdev);
1520 return -1;
1521 }
1522
1523 return 0;
1524 }
1525
1526 /*
1527 * Delete the UVC device.
1528 *
1529 * Called by the kernel when the last reference to the uvc_device structure
1530 * is released.
1531 *
1532 * Unregistering the video devices is done here because every opened instance
1533 * must be closed before the device can be unregistered. An alternative would
1534 * have been to use another reference count for uvc_v4l2_open/uvc_release, and
1535 * unregister the video devices on disconnect when that reference count drops
1536 * to zero.
1537 *
1538 * As this function is called after or during disconnect(), all URBs have
1539 * already been canceled by the USB core. There is no need to kill the
1540 * interrupt URB manually.
1541 */
1542 void uvc_delete(struct kref *kref)
1543 {
1544 struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
1545 struct list_head *p, *n;
1546
1547 /* Unregister the video device. */
1548 uvc_unregister_video(dev);
1549 usb_put_intf(dev->intf);
1550 usb_put_dev(dev->udev);
1551
1552 uvc_status_cleanup(dev);
1553 uvc_ctrl_cleanup_device(dev);
1554
1555 list_for_each_safe(p, n, &dev->entities) {
1556 struct uvc_entity *entity;
1557 entity = list_entry(p, struct uvc_entity, list);
1558 kfree(entity);
1559 }
1560
1561 list_for_each_safe(p, n, &dev->streaming) {
1562 struct uvc_streaming *streaming;
1563 streaming = list_entry(p, struct uvc_streaming, list);
1564 usb_driver_release_interface(&uvc_driver.driver,
1565 streaming->intf);
1566 usb_put_intf(streaming->intf);
1567 kfree(streaming->format);
1568 kfree(streaming->header.bmaControls);
1569 kfree(streaming);
1570 }
1571
1572 kfree(dev);
1573 }
1574
1575 static int uvc_probe(struct usb_interface *intf,
1576 const struct usb_device_id *id)
1577 {
1578 struct usb_device *udev = interface_to_usbdev(intf);
1579 struct uvc_device *dev;
1580 int ret;
1581
1582 if (id->idVendor && id->idProduct)
1583 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1584 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1585 id->idProduct);
1586 else
1587 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1588 udev->devpath);
1589
1590 /* Allocate memory for the device and initialize it. */
1591 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1592 return -ENOMEM;
1593
1594 INIT_LIST_HEAD(&dev->entities);
1595 INIT_LIST_HEAD(&dev->streaming);
1596 kref_init(&dev->kref);
1597 atomic_set(&dev->users, 0);
1598
1599 dev->udev = usb_get_dev(udev);
1600 dev->intf = usb_get_intf(intf);
1601 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1602 dev->quirks = id->driver_info | uvc_quirks_param;
1603
1604 if (udev->product != NULL)
1605 strlcpy(dev->name, udev->product, sizeof dev->name);
1606 else
1607 snprintf(dev->name, sizeof dev->name,
1608 "UVC Camera (%04x:%04x)",
1609 le16_to_cpu(udev->descriptor.idVendor),
1610 le16_to_cpu(udev->descriptor.idProduct));
1611
1612 /* Parse the Video Class control descriptor. */
1613 if (uvc_parse_control(dev) < 0) {
1614 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1615 "descriptors.\n");
1616 goto error;
1617 }
1618
1619 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1620 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1621 udev->product ? udev->product : "<unnamed>",
1622 le16_to_cpu(udev->descriptor.idVendor),
1623 le16_to_cpu(udev->descriptor.idProduct));
1624
1625 if (uvc_quirks_param != 0) {
1626 uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module "
1627 "parameter for testing purpose.\n", uvc_quirks_param);
1628 uvc_printk(KERN_INFO, "Please report required quirks to the "
1629 "linux-uvc-devel mailing list.\n");
1630 }
1631
1632 /* Initialize controls. */
1633 if (uvc_ctrl_init_device(dev) < 0)
1634 goto error;
1635
1636 /* Register the video devices. */
1637 if (uvc_register_video(dev) < 0)
1638 goto error;
1639
1640 /* Save our data pointer in the interface data. */
1641 usb_set_intfdata(intf, dev);
1642
1643 /* Initialize the interrupt URB. */
1644 if ((ret = uvc_status_init(dev)) < 0) {
1645 uvc_printk(KERN_INFO, "Unable to initialize the status "
1646 "endpoint (%d), status interrupt will not be "
1647 "supported.\n", ret);
1648 }
1649
1650 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1651 return 0;
1652
1653 error:
1654 kref_put(&dev->kref, uvc_delete);
1655 return -ENODEV;
1656 }
1657
1658 static void uvc_disconnect(struct usb_interface *intf)
1659 {
1660 struct uvc_device *dev = usb_get_intfdata(intf);
1661
1662 /* Set the USB interface data to NULL. This can be done outside the
1663 * lock, as there's no other reader.
1664 */
1665 usb_set_intfdata(intf, NULL);
1666
1667 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING)
1668 return;
1669
1670 /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide
1671 * lock is needed to prevent uvc_disconnect from releasing its
1672 * reference to the uvc_device instance after uvc_v4l2_open() received
1673 * the pointer to the device (video_devdata) but before it got the
1674 * chance to increase the reference count (kref_get).
1675 *
1676 * Note that the reference can't be released with the lock held,
1677 * otherwise a AB-BA deadlock can occur with videodev_lock that
1678 * videodev acquires in videodev_open() and video_unregister_device().
1679 */
1680 mutex_lock(&uvc_driver.open_mutex);
1681 dev->state |= UVC_DEV_DISCONNECTED;
1682 mutex_unlock(&uvc_driver.open_mutex);
1683
1684 kref_put(&dev->kref, uvc_delete);
1685 }
1686
1687 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1688 {
1689 struct uvc_device *dev = usb_get_intfdata(intf);
1690
1691 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1692 intf->cur_altsetting->desc.bInterfaceNumber);
1693
1694 /* Controls are cached on the fly so they don't need to be saved. */
1695 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL)
1696 return uvc_status_suspend(dev);
1697
1698 if (dev->video.streaming->intf != intf) {
1699 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
1700 "interface mismatch.\n");
1701 return -EINVAL;
1702 }
1703
1704 return uvc_video_suspend(&dev->video);
1705 }
1706
1707 static int __uvc_resume(struct usb_interface *intf, int reset)
1708 {
1709 struct uvc_device *dev = usb_get_intfdata(intf);
1710
1711 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1712 intf->cur_altsetting->desc.bInterfaceNumber);
1713
1714 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) {
1715 if (reset) {
1716 int ret = uvc_ctrl_resume_device(dev);
1717
1718 if (ret < 0)
1719 return ret;
1720 }
1721
1722 return uvc_status_resume(dev);
1723 }
1724
1725 if (dev->video.streaming->intf != intf) {
1726 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
1727 "interface mismatch.\n");
1728 return -EINVAL;
1729 }
1730
1731 return uvc_video_resume(&dev->video);
1732 }
1733
1734 static int uvc_resume(struct usb_interface *intf)
1735 {
1736 return __uvc_resume(intf, 0);
1737 }
1738
1739 static int uvc_reset_resume(struct usb_interface *intf)
1740 {
1741 return __uvc_resume(intf, 1);
1742 }
1743
1744 /* ------------------------------------------------------------------------
1745 * Driver initialization and cleanup
1746 */
1747
1748 /*
1749 * The Logitech cameras listed below have their interface class set to
1750 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1751 * though they are compliant.
1752 */
1753 static struct usb_device_id uvc_ids[] = {
1754 /* Microsoft Lifecam NX-6000 */
1755 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1756 | USB_DEVICE_ID_MATCH_INT_INFO,
1757 .idVendor = 0x045e,
1758 .idProduct = 0x00f8,
1759 .bInterfaceClass = USB_CLASS_VIDEO,
1760 .bInterfaceSubClass = 1,
1761 .bInterfaceProtocol = 0,
1762 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1763 /* Microsoft Lifecam VX-7000 */
1764 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1765 | USB_DEVICE_ID_MATCH_INT_INFO,
1766 .idVendor = 0x045e,
1767 .idProduct = 0x0723,
1768 .bInterfaceClass = USB_CLASS_VIDEO,
1769 .bInterfaceSubClass = 1,
1770 .bInterfaceProtocol = 0,
1771 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1772 /* Logitech Quickcam Fusion */
1773 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1774 | USB_DEVICE_ID_MATCH_INT_INFO,
1775 .idVendor = 0x046d,
1776 .idProduct = 0x08c1,
1777 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1778 .bInterfaceSubClass = 1,
1779 .bInterfaceProtocol = 0 },
1780 /* Logitech Quickcam Orbit MP */
1781 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1782 | USB_DEVICE_ID_MATCH_INT_INFO,
1783 .idVendor = 0x046d,
1784 .idProduct = 0x08c2,
1785 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1786 .bInterfaceSubClass = 1,
1787 .bInterfaceProtocol = 0 },
1788 /* Logitech Quickcam Pro for Notebook */
1789 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1790 | USB_DEVICE_ID_MATCH_INT_INFO,
1791 .idVendor = 0x046d,
1792 .idProduct = 0x08c3,
1793 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1794 .bInterfaceSubClass = 1,
1795 .bInterfaceProtocol = 0 },
1796 /* Logitech Quickcam Pro 5000 */
1797 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1798 | USB_DEVICE_ID_MATCH_INT_INFO,
1799 .idVendor = 0x046d,
1800 .idProduct = 0x08c5,
1801 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1802 .bInterfaceSubClass = 1,
1803 .bInterfaceProtocol = 0 },
1804 /* Logitech Quickcam OEM Dell Notebook */
1805 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1806 | USB_DEVICE_ID_MATCH_INT_INFO,
1807 .idVendor = 0x046d,
1808 .idProduct = 0x08c6,
1809 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1810 .bInterfaceSubClass = 1,
1811 .bInterfaceProtocol = 0 },
1812 /* Logitech Quickcam OEM Cisco VT Camera II */
1813 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1814 | USB_DEVICE_ID_MATCH_INT_INFO,
1815 .idVendor = 0x046d,
1816 .idProduct = 0x08c7,
1817 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1818 .bInterfaceSubClass = 1,
1819 .bInterfaceProtocol = 0 },
1820 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
1821 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1822 | USB_DEVICE_ID_MATCH_INT_INFO,
1823 .idVendor = 0x058f,
1824 .idProduct = 0x3820,
1825 .bInterfaceClass = USB_CLASS_VIDEO,
1826 .bInterfaceSubClass = 1,
1827 .bInterfaceProtocol = 0,
1828 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1829 /* Apple Built-In iSight */
1830 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1831 | USB_DEVICE_ID_MATCH_INT_INFO,
1832 .idVendor = 0x05ac,
1833 .idProduct = 0x8501,
1834 .bInterfaceClass = USB_CLASS_VIDEO,
1835 .bInterfaceSubClass = 1,
1836 .bInterfaceProtocol = 0,
1837 .driver_info = UVC_QUIRK_PROBE_MINMAX
1838 | UVC_QUIRK_BUILTIN_ISIGHT },
1839 /* Genesys Logic USB 2.0 PC Camera */
1840 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1841 | USB_DEVICE_ID_MATCH_INT_INFO,
1842 .idVendor = 0x05e3,
1843 .idProduct = 0x0505,
1844 .bInterfaceClass = USB_CLASS_VIDEO,
1845 .bInterfaceSubClass = 1,
1846 .bInterfaceProtocol = 0,
1847 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1848 /* ViMicro Vega */
1849 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1850 | USB_DEVICE_ID_MATCH_INT_INFO,
1851 .idVendor = 0x0ac8,
1852 .idProduct = 0x332d,
1853 .bInterfaceClass = USB_CLASS_VIDEO,
1854 .bInterfaceSubClass = 1,
1855 .bInterfaceProtocol = 0,
1856 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
1857 /* ViMicro - Minoru3D */
1858 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1859 | USB_DEVICE_ID_MATCH_INT_INFO,
1860 .idVendor = 0x0ac8,
1861 .idProduct = 0x3410,
1862 .bInterfaceClass = USB_CLASS_VIDEO,
1863 .bInterfaceSubClass = 1,
1864 .bInterfaceProtocol = 0,
1865 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
1866 /* ViMicro Venus - Minoru3D */
1867 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1868 | USB_DEVICE_ID_MATCH_INT_INFO,
1869 .idVendor = 0x0ac8,
1870 .idProduct = 0x3420,
1871 .bInterfaceClass = USB_CLASS_VIDEO,
1872 .bInterfaceSubClass = 1,
1873 .bInterfaceProtocol = 0,
1874 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
1875 /* MT6227 */
1876 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1877 | USB_DEVICE_ID_MATCH_INT_INFO,
1878 .idVendor = 0x0e8d,
1879 .idProduct = 0x0004,
1880 .bInterfaceClass = USB_CLASS_VIDEO,
1881 .bInterfaceSubClass = 1,
1882 .bInterfaceProtocol = 0,
1883 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1884 /* Syntek (HP Spartan) */
1885 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1886 | USB_DEVICE_ID_MATCH_INT_INFO,
1887 .idVendor = 0x174f,
1888 .idProduct = 0x5212,
1889 .bInterfaceClass = USB_CLASS_VIDEO,
1890 .bInterfaceSubClass = 1,
1891 .bInterfaceProtocol = 0,
1892 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1893 /* Syntek (Samsung Q310) */
1894 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1895 | USB_DEVICE_ID_MATCH_INT_INFO,
1896 .idVendor = 0x174f,
1897 .idProduct = 0x5931,
1898 .bInterfaceClass = USB_CLASS_VIDEO,
1899 .bInterfaceSubClass = 1,
1900 .bInterfaceProtocol = 0,
1901 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1902 /* Syntek (Asus F9SG) */
1903 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1904 | USB_DEVICE_ID_MATCH_INT_INFO,
1905 .idVendor = 0x174f,
1906 .idProduct = 0x8a31,
1907 .bInterfaceClass = USB_CLASS_VIDEO,
1908 .bInterfaceSubClass = 1,
1909 .bInterfaceProtocol = 0,
1910 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1911 /* Syntek (Asus U3S) */
1912 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1913 | USB_DEVICE_ID_MATCH_INT_INFO,
1914 .idVendor = 0x174f,
1915 .idProduct = 0x8a33,
1916 .bInterfaceClass = USB_CLASS_VIDEO,
1917 .bInterfaceSubClass = 1,
1918 .bInterfaceProtocol = 0,
1919 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1920 /* Syntek (JAOtech Smart Terminal) */
1921 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1922 | USB_DEVICE_ID_MATCH_INT_INFO,
1923 .idVendor = 0x174f,
1924 .idProduct = 0x8a34,
1925 .bInterfaceClass = USB_CLASS_VIDEO,
1926 .bInterfaceSubClass = 1,
1927 .bInterfaceProtocol = 0,
1928 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1929 /* Lenovo Thinkpad SL400/SL500 */
1930 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1931 | USB_DEVICE_ID_MATCH_INT_INFO,
1932 .idVendor = 0x17ef,
1933 .idProduct = 0x480b,
1934 .bInterfaceClass = USB_CLASS_VIDEO,
1935 .bInterfaceSubClass = 1,
1936 .bInterfaceProtocol = 0,
1937 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1938 /* Aveo Technology USB 2.0 Camera */
1939 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1940 | USB_DEVICE_ID_MATCH_INT_INFO,
1941 .idVendor = 0x1871,
1942 .idProduct = 0x0306,
1943 .bInterfaceClass = USB_CLASS_VIDEO,
1944 .bInterfaceSubClass = 1,
1945 .bInterfaceProtocol = 0,
1946 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1947 /* Ecamm Pico iMage */
1948 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1949 | USB_DEVICE_ID_MATCH_INT_INFO,
1950 .idVendor = 0x18cd,
1951 .idProduct = 0xcafe,
1952 .bInterfaceClass = USB_CLASS_VIDEO,
1953 .bInterfaceSubClass = 1,
1954 .bInterfaceProtocol = 0,
1955 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1956 /* FSC WebCam V30S */
1957 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1958 | USB_DEVICE_ID_MATCH_INT_INFO,
1959 .idVendor = 0x18ec,
1960 .idProduct = 0x3288,
1961 .bInterfaceClass = USB_CLASS_VIDEO,
1962 .bInterfaceSubClass = 1,
1963 .bInterfaceProtocol = 0,
1964 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1965 /* Bodelin ProScopeHR */
1966 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1967 | USB_DEVICE_ID_MATCH_DEV_HI
1968 | USB_DEVICE_ID_MATCH_INT_INFO,
1969 .idVendor = 0x19ab,
1970 .idProduct = 0x1000,
1971 .bcdDevice_hi = 0x0126,
1972 .bInterfaceClass = USB_CLASS_VIDEO,
1973 .bInterfaceSubClass = 1,
1974 .bInterfaceProtocol = 0,
1975 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
1976 /* SiGma Micro USB Web Camera */
1977 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1978 | USB_DEVICE_ID_MATCH_INT_INFO,
1979 .idVendor = 0x1c4f,
1980 .idProduct = 0x3000,
1981 .bInterfaceClass = USB_CLASS_VIDEO,
1982 .bInterfaceSubClass = 1,
1983 .bInterfaceProtocol = 0,
1984 .driver_info = UVC_QUIRK_PROBE_MINMAX
1985 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
1986 /* Generic USB Video Class */
1987 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
1988 {}
1989 };
1990
1991 MODULE_DEVICE_TABLE(usb, uvc_ids);
1992
1993 struct uvc_driver uvc_driver = {
1994 .driver = {
1995 .name = "uvcvideo",
1996 .probe = uvc_probe,
1997 .disconnect = uvc_disconnect,
1998 .suspend = uvc_suspend,
1999 .resume = uvc_resume,
2000 .reset_resume = uvc_reset_resume,
2001 .id_table = uvc_ids,
2002 .supports_autosuspend = 1,
2003 },
2004 };
2005
2006 static int __init uvc_init(void)
2007 {
2008 int result;
2009
2010 INIT_LIST_HEAD(&uvc_driver.devices);
2011 INIT_LIST_HEAD(&uvc_driver.controls);
2012 mutex_init(&uvc_driver.open_mutex);
2013 mutex_init(&uvc_driver.ctrl_mutex);
2014
2015 uvc_ctrl_init();
2016
2017 result = usb_register(&uvc_driver.driver);
2018 if (result == 0)
2019 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2020 return result;
2021 }
2022
2023 static void __exit uvc_cleanup(void)
2024 {
2025 usb_deregister(&uvc_driver.driver);
2026 }
2027
2028 module_init(uvc_init);
2029 module_exit(uvc_cleanup);
2030
2031 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2032 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2033 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2034 MODULE_PARM_DESC(quirks, "Forced device quirks");
2035 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2036 MODULE_PARM_DESC(trace, "Trace level bitmask");
2037
2038 MODULE_AUTHOR(DRIVER_AUTHOR);
2039 MODULE_DESCRIPTION(DRIVER_DESC);
2040 MODULE_LICENSE("GPL");
2041 MODULE_VERSION(DRIVER_VERSION);
2042
Linux with added FPC-III support