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sched: Remove double_rq_lock() from __migrate_task()
[linux/fpc-iii.git] / drivers / media / usb / uvc / uvc_driver.c
blobad47c5cb539a6f56ce070180079267711c375df3
1 /*
2 * uvc_driver.c -- USB Video Class driver
3 *
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 */
13
14 #include <linux/atomic.h>
15 #include <linux/kernel.h>
16 #include <linux/list.h>
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/usb.h>
20 #include <linux/videodev2.h>
21 #include <linux/vmalloc.h>
22 #include <linux/wait.h>
23 #include <linux/version.h>
24 #include <asm/unaligned.h>
25
26 #include <media/v4l2-common.h>
27
28 #include "uvcvideo.h"
29
30 #define DRIVER_AUTHOR "Laurent Pinchart " \
31 "<laurent.pinchart@ideasonboard.com>"
32 #define DRIVER_DESC "USB Video Class driver"
33
34 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
35 unsigned int uvc_no_drop_param;
36 static unsigned int uvc_quirks_param = -1;
37 unsigned int uvc_trace_param;
38 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
39
40 /* ------------------------------------------------------------------------
41 * Video formats
42 */
43
44 static struct uvc_format_desc uvc_fmts[] = {
45 {
46 .name = "YUV 4:2:2 (YUYV)",
47 .guid = UVC_GUID_FORMAT_YUY2,
48 .fcc = V4L2_PIX_FMT_YUYV,
49 },
50 {
51 .name = "YUV 4:2:2 (YUYV)",
52 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
53 .fcc = V4L2_PIX_FMT_YUYV,
54 },
55 {
56 .name = "YUV 4:2:0 (NV12)",
57 .guid = UVC_GUID_FORMAT_NV12,
58 .fcc = V4L2_PIX_FMT_NV12,
59 },
60 {
61 .name = "MJPEG",
62 .guid = UVC_GUID_FORMAT_MJPEG,
63 .fcc = V4L2_PIX_FMT_MJPEG,
64 },
65 {
66 .name = "YVU 4:2:0 (YV12)",
67 .guid = UVC_GUID_FORMAT_YV12,
68 .fcc = V4L2_PIX_FMT_YVU420,
69 },
70 {
71 .name = "YUV 4:2:0 (I420)",
72 .guid = UVC_GUID_FORMAT_I420,
73 .fcc = V4L2_PIX_FMT_YUV420,
74 },
75 {
76 .name = "YUV 4:2:0 (M420)",
77 .guid = UVC_GUID_FORMAT_M420,
78 .fcc = V4L2_PIX_FMT_M420,
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 8-bit (Y800)",
87 .guid = UVC_GUID_FORMAT_Y800,
88 .fcc = V4L2_PIX_FMT_GREY,
89 },
90 {
91 .name = "Greyscale 8-bit (Y8 )",
92 .guid = UVC_GUID_FORMAT_Y8,
93 .fcc = V4L2_PIX_FMT_GREY,
94 },
95 {
96 .name = "Greyscale 10-bit (Y10 )",
97 .guid = UVC_GUID_FORMAT_Y10,
98 .fcc = V4L2_PIX_FMT_Y10,
99 },
100 {
101 .name = "Greyscale 12-bit (Y12 )",
102 .guid = UVC_GUID_FORMAT_Y12,
103 .fcc = V4L2_PIX_FMT_Y12,
104 },
105 {
106 .name = "Greyscale 16-bit (Y16 )",
107 .guid = UVC_GUID_FORMAT_Y16,
108 .fcc = V4L2_PIX_FMT_Y16,
109 },
110 {
111 .name = "BGGR Bayer (BY8 )",
112 .guid = UVC_GUID_FORMAT_BY8,
113 .fcc = V4L2_PIX_FMT_SBGGR8,
114 },
115 {
116 .name = "BGGR Bayer (BA81)",
117 .guid = UVC_GUID_FORMAT_BA81,
118 .fcc = V4L2_PIX_FMT_SBGGR8,
119 },
120 {
121 .name = "GBRG Bayer (GBRG)",
122 .guid = UVC_GUID_FORMAT_GBRG,
123 .fcc = V4L2_PIX_FMT_SGBRG8,
124 },
125 {
126 .name = "GRBG Bayer (GRBG)",
127 .guid = UVC_GUID_FORMAT_GRBG,
128 .fcc = V4L2_PIX_FMT_SGRBG8,
129 },
130 {
131 .name = "RGGB Bayer (RGGB)",
132 .guid = UVC_GUID_FORMAT_RGGB,
133 .fcc = V4L2_PIX_FMT_SRGGB8,
134 },
135 {
136 .name = "RGB565",
137 .guid = UVC_GUID_FORMAT_RGBP,
138 .fcc = V4L2_PIX_FMT_RGB565,
139 },
140 {
141 .name = "H.264",
142 .guid = UVC_GUID_FORMAT_H264,
143 .fcc = V4L2_PIX_FMT_H264,
144 },
145 };
146
147 /* ------------------------------------------------------------------------
148 * Utility functions
149 */
150
151 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
152 __u8 epaddr)
153 {
154 struct usb_host_endpoint *ep;
155 unsigned int i;
156
157 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
158 ep = &alts->endpoint[i];
159 if (ep->desc.bEndpointAddress == epaddr)
160 return ep;
161 }
162
163 return NULL;
164 }
165
166 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
167 {
168 unsigned int len = ARRAY_SIZE(uvc_fmts);
169 unsigned int i;
170
171 for (i = 0; i < len; ++i) {
172 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
173 return &uvc_fmts[i];
174 }
175
176 return NULL;
177 }
178
179 static __u32 uvc_colorspace(const __u8 primaries)
180 {
181 static const __u8 colorprimaries[] = {
182 0,
183 V4L2_COLORSPACE_SRGB,
184 V4L2_COLORSPACE_470_SYSTEM_M,
185 V4L2_COLORSPACE_470_SYSTEM_BG,
186 V4L2_COLORSPACE_SMPTE170M,
187 V4L2_COLORSPACE_SMPTE240M,
188 };
189
190 if (primaries < ARRAY_SIZE(colorprimaries))
191 return colorprimaries[primaries];
192
193 return 0;
194 }
195
196 /* Simplify a fraction using a simple continued fraction decomposition. The
197 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
198 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
199 * arbitrary parameters to remove non-significative terms from the simple
200 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
201 * respectively seems to give nice results.
202 */
203 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
204 unsigned int n_terms, unsigned int threshold)
205 {
206 uint32_t *an;
207 uint32_t x, y, r;
208 unsigned int i, n;
209
210 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
211 if (an == NULL)
212 return;
213
214 /* Convert the fraction to a simple continued fraction. See
215 * http://mathforum.org/dr.math/faq/faq.fractions.html
216 * Stop if the current term is bigger than or equal to the given
217 * threshold.
218 */
219 x = *numerator;
220 y = *denominator;
221
222 for (n = 0; n < n_terms && y != 0; ++n) {
223 an[n] = x / y;
224 if (an[n] >= threshold) {
225 if (n < 2)
226 n++;
227 break;
228 }
229
230 r = x - an[n] * y;
231 x = y;
232 y = r;
233 }
234
235 /* Expand the simple continued fraction back to an integer fraction. */
236 x = 0;
237 y = 1;
238
239 for (i = n; i > 0; --i) {
240 r = y;
241 y = an[i-1] * y + x;
242 x = r;
243 }
244
245 *numerator = y;
246 *denominator = x;
247 kfree(an);
248 }
249
250 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
251 * to compute numerator / denominator * 10000000 using 32 bit fixed point
252 * arithmetic only.
253 */
254 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
255 {
256 uint32_t multiplier;
257
258 /* Saturate the result if the operation would overflow. */
259 if (denominator == 0 ||
260 numerator/denominator >= ((uint32_t)-1)/10000000)
261 return (uint32_t)-1;
262
263 /* Divide both the denominator and the multiplier by two until
264 * numerator * multiplier doesn't overflow. If anyone knows a better
265 * algorithm please let me know.
266 */
267 multiplier = 10000000;
268 while (numerator > ((uint32_t)-1)/multiplier) {
269 multiplier /= 2;
270 denominator /= 2;
271 }
272
273 return denominator ? numerator * multiplier / denominator : 0;
274 }
275
276 /* ------------------------------------------------------------------------
277 * Terminal and unit management
278 */
279
280 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
281 {
282 struct uvc_entity *entity;
283
284 list_for_each_entry(entity, &dev->entities, list) {
285 if (entity->id == id)
286 return entity;
287 }
288
289 return NULL;
290 }
291
292 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
293 int id, struct uvc_entity *entity)
294 {
295 unsigned int i;
296
297 if (entity == NULL)
298 entity = list_entry(&dev->entities, struct uvc_entity, list);
299
300 list_for_each_entry_continue(entity, &dev->entities, list) {
301 for (i = 0; i < entity->bNrInPins; ++i)
302 if (entity->baSourceID[i] == id)
303 return entity;
304 }
305
306 return NULL;
307 }
308
309 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
310 {
311 struct uvc_streaming *stream;
312
313 list_for_each_entry(stream, &dev->streams, list) {
314 if (stream->header.bTerminalLink == id)
315 return stream;
316 }
317
318 return NULL;
319 }
320
321 /* ------------------------------------------------------------------------
322 * Descriptors parsing
323 */
324
325 static int uvc_parse_format(struct uvc_device *dev,
326 struct uvc_streaming *streaming, struct uvc_format *format,
327 __u32 **intervals, unsigned char *buffer, int buflen)
328 {
329 struct usb_interface *intf = streaming->intf;
330 struct usb_host_interface *alts = intf->cur_altsetting;
331 struct uvc_format_desc *fmtdesc;
332 struct uvc_frame *frame;
333 const unsigned char *start = buffer;
334 unsigned int interval;
335 unsigned int i, n;
336 __u8 ftype;
337
338 format->type = buffer[2];
339 format->index = buffer[3];
340
341 switch (buffer[2]) {
342 case UVC_VS_FORMAT_UNCOMPRESSED:
343 case UVC_VS_FORMAT_FRAME_BASED:
344 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
345 if (buflen < n) {
346 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
347 "interface %d FORMAT error\n",
348 dev->udev->devnum,
349 alts->desc.bInterfaceNumber);
350 return -EINVAL;
351 }
352
353 /* Find the format descriptor from its GUID. */
354 fmtdesc = uvc_format_by_guid(&buffer[5]);
355
356 if (fmtdesc != NULL) {
357 strlcpy(format->name, fmtdesc->name,
358 sizeof format->name);
359 format->fcc = fmtdesc->fcc;
360 } else {
361 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
362 &buffer[5]);
363 snprintf(format->name, sizeof(format->name), "%pUl\n",
364 &buffer[5]);
365 format->fcc = 0;
366 }
367
368 format->bpp = buffer[21];
369 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
370 ftype = UVC_VS_FRAME_UNCOMPRESSED;
371 } else {
372 ftype = UVC_VS_FRAME_FRAME_BASED;
373 if (buffer[27])
374 format->flags = UVC_FMT_FLAG_COMPRESSED;
375 }
376 break;
377
378 case UVC_VS_FORMAT_MJPEG:
379 if (buflen < 11) {
380 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
381 "interface %d FORMAT error\n",
382 dev->udev->devnum,
383 alts->desc.bInterfaceNumber);
384 return -EINVAL;
385 }
386
387 strlcpy(format->name, "MJPEG", sizeof format->name);
388 format->fcc = V4L2_PIX_FMT_MJPEG;
389 format->flags = UVC_FMT_FLAG_COMPRESSED;
390 format->bpp = 0;
391 ftype = UVC_VS_FRAME_MJPEG;
392 break;
393
394 case UVC_VS_FORMAT_DV:
395 if (buflen < 9) {
396 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
397 "interface %d FORMAT error\n",
398 dev->udev->devnum,
399 alts->desc.bInterfaceNumber);
400 return -EINVAL;
401 }
402
403 switch (buffer[8] & 0x7f) {
404 case 0:
405 strlcpy(format->name, "SD-DV", sizeof format->name);
406 break;
407 case 1:
408 strlcpy(format->name, "SDL-DV", sizeof format->name);
409 break;
410 case 2:
411 strlcpy(format->name, "HD-DV", sizeof format->name);
412 break;
413 default:
414 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
415 "interface %d: unknown DV format %u\n",
416 dev->udev->devnum,
417 alts->desc.bInterfaceNumber, buffer[8]);
418 return -EINVAL;
419 }
420
421 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
422 sizeof format->name);
423
424 format->fcc = V4L2_PIX_FMT_DV;
425 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
426 format->bpp = 0;
427 ftype = 0;
428
429 /* Create a dummy frame descriptor. */
430 frame = &format->frame[0];
431 memset(&format->frame[0], 0, sizeof format->frame[0]);
432 frame->bFrameIntervalType = 1;
433 frame->dwDefaultFrameInterval = 1;
434 frame->dwFrameInterval = *intervals;
435 *(*intervals)++ = 1;
436 format->nframes = 1;
437 break;
438
439 case UVC_VS_FORMAT_MPEG2TS:
440 case UVC_VS_FORMAT_STREAM_BASED:
441 /* Not supported yet. */
442 default:
443 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
444 "interface %d unsupported format %u\n",
445 dev->udev->devnum, alts->desc.bInterfaceNumber,
446 buffer[2]);
447 return -EINVAL;
448 }
449
450 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
451
452 buflen -= buffer[0];
453 buffer += buffer[0];
454
455 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
456 * based formats have frame descriptors.
457 */
458 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
459 buffer[2] == ftype) {
460 frame = &format->frame[format->nframes];
461 if (ftype != UVC_VS_FRAME_FRAME_BASED)
462 n = buflen > 25 ? buffer[25] : 0;
463 else
464 n = buflen > 21 ? buffer[21] : 0;
465
466 n = n ? n : 3;
467
468 if (buflen < 26 + 4*n) {
469 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
470 "interface %d FRAME error\n", dev->udev->devnum,
471 alts->desc.bInterfaceNumber);
472 return -EINVAL;
473 }
474
475 frame->bFrameIndex = buffer[3];
476 frame->bmCapabilities = buffer[4];
477 frame->wWidth = get_unaligned_le16(&buffer[5]);
478 frame->wHeight = get_unaligned_le16(&buffer[7]);
479 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
480 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
481 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
482 frame->dwMaxVideoFrameBufferSize =
483 get_unaligned_le32(&buffer[17]);
484 frame->dwDefaultFrameInterval =
485 get_unaligned_le32(&buffer[21]);
486 frame->bFrameIntervalType = buffer[25];
487 } else {
488 frame->dwMaxVideoFrameBufferSize = 0;
489 frame->dwDefaultFrameInterval =
490 get_unaligned_le32(&buffer[17]);
491 frame->bFrameIntervalType = buffer[21];
492 }
493 frame->dwFrameInterval = *intervals;
494
495 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
496 * completely. Observed behaviours range from setting the
497 * value to 1.1x the actual frame size to hardwiring the
498 * 16 low bits to 0. This results in a higher than necessary
499 * memory usage as well as a wrong image size information. For
500 * uncompressed formats this can be fixed by computing the
501 * value from the frame size.
502 */
503 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
504 frame->dwMaxVideoFrameBufferSize = format->bpp
505 * frame->wWidth * frame->wHeight / 8;
506
507 /* Some bogus devices report dwMinFrameInterval equal to
508 * dwMaxFrameInterval and have dwFrameIntervalStep set to
509 * zero. Setting all null intervals to 1 fixes the problem and
510 * some other divisions by zero that could happen.
511 */
512 for (i = 0; i < n; ++i) {
513 interval = get_unaligned_le32(&buffer[26+4*i]);
514 *(*intervals)++ = interval ? interval : 1;
515 }
516
517 /* Make sure that the default frame interval stays between
518 * the boundaries.
519 */
520 n -= frame->bFrameIntervalType ? 1 : 2;
521 frame->dwDefaultFrameInterval =
522 min(frame->dwFrameInterval[n],
523 max(frame->dwFrameInterval[0],
524 frame->dwDefaultFrameInterval));
525
526 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
527 frame->bFrameIntervalType = 1;
528 frame->dwFrameInterval[0] =
529 frame->dwDefaultFrameInterval;
530 }
531
532 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
533 frame->wWidth, frame->wHeight,
534 10000000/frame->dwDefaultFrameInterval,
535 (100000000/frame->dwDefaultFrameInterval)%10);
536
537 format->nframes++;
538 buflen -= buffer[0];
539 buffer += buffer[0];
540 }
541
542 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
543 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
544 buflen -= buffer[0];
545 buffer += buffer[0];
546 }
547
548 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
549 buffer[2] == UVC_VS_COLORFORMAT) {
550 if (buflen < 6) {
551 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
552 "interface %d COLORFORMAT error\n",
553 dev->udev->devnum,
554 alts->desc.bInterfaceNumber);
555 return -EINVAL;
556 }
557
558 format->colorspace = uvc_colorspace(buffer[3]);
559
560 buflen -= buffer[0];
561 buffer += buffer[0];
562 }
563
564 return buffer - start;
565 }
566
567 static int uvc_parse_streaming(struct uvc_device *dev,
568 struct usb_interface *intf)
569 {
570 struct uvc_streaming *streaming = NULL;
571 struct uvc_format *format;
572 struct uvc_frame *frame;
573 struct usb_host_interface *alts = &intf->altsetting[0];
574 unsigned char *_buffer, *buffer = alts->extra;
575 int _buflen, buflen = alts->extralen;
576 unsigned int nformats = 0, nframes = 0, nintervals = 0;
577 unsigned int size, i, n, p;
578 __u32 *interval;
579 __u16 psize;
580 int ret = -EINVAL;
581
582 if (intf->cur_altsetting->desc.bInterfaceSubClass
583 != UVC_SC_VIDEOSTREAMING) {
584 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
585 "video streaming interface\n", dev->udev->devnum,
586 intf->altsetting[0].desc.bInterfaceNumber);
587 return -EINVAL;
588 }
589
590 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
591 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
592 "claimed\n", dev->udev->devnum,
593 intf->altsetting[0].desc.bInterfaceNumber);
594 return -EINVAL;
595 }
596
597 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
598 if (streaming == NULL) {
599 usb_driver_release_interface(&uvc_driver.driver, intf);
600 return -EINVAL;
601 }
602
603 mutex_init(&streaming->mutex);
604 streaming->dev = dev;
605 streaming->intf = usb_get_intf(intf);
606 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
607
608 /* The Pico iMage webcam has its class-specific interface descriptors
609 * after the endpoint descriptors.
610 */
611 if (buflen == 0) {
612 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
613 struct usb_host_endpoint *ep = &alts->endpoint[i];
614
615 if (ep->extralen == 0)
616 continue;
617
618 if (ep->extralen > 2 &&
619 ep->extra[1] == USB_DT_CS_INTERFACE) {
620 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
621 "from endpoint %u.\n", i);
622 buffer = alts->endpoint[i].extra;
623 buflen = alts->endpoint[i].extralen;
624 break;
625 }
626 }
627 }
628
629 /* Skip the standard interface descriptors. */
630 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
631 buflen -= buffer[0];
632 buffer += buffer[0];
633 }
634
635 if (buflen <= 2) {
636 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
637 "interface descriptors found.\n");
638 goto error;
639 }
640
641 /* Parse the header descriptor. */
642 switch (buffer[2]) {
643 case UVC_VS_OUTPUT_HEADER:
644 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
645 size = 9;
646 break;
647
648 case UVC_VS_INPUT_HEADER:
649 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
650 size = 13;
651 break;
652
653 default:
654 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
655 "%d HEADER descriptor not found.\n", dev->udev->devnum,
656 alts->desc.bInterfaceNumber);
657 goto error;
658 }
659
660 p = buflen >= 4 ? buffer[3] : 0;
661 n = buflen >= size ? buffer[size-1] : 0;
662
663 if (buflen < size + p*n) {
664 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
665 "interface %d HEADER descriptor is invalid.\n",
666 dev->udev->devnum, alts->desc.bInterfaceNumber);
667 goto error;
668 }
669
670 streaming->header.bNumFormats = p;
671 streaming->header.bEndpointAddress = buffer[6];
672 if (buffer[2] == UVC_VS_INPUT_HEADER) {
673 streaming->header.bmInfo = buffer[7];
674 streaming->header.bTerminalLink = buffer[8];
675 streaming->header.bStillCaptureMethod = buffer[9];
676 streaming->header.bTriggerSupport = buffer[10];
677 streaming->header.bTriggerUsage = buffer[11];
678 } else {
679 streaming->header.bTerminalLink = buffer[7];
680 }
681 streaming->header.bControlSize = n;
682
683 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
684 GFP_KERNEL);
685 if (streaming->header.bmaControls == NULL) {
686 ret = -ENOMEM;
687 goto error;
688 }
689
690 buflen -= buffer[0];
691 buffer += buffer[0];
692
693 _buffer = buffer;
694 _buflen = buflen;
695
696 /* Count the format and frame descriptors. */
697 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
698 switch (_buffer[2]) {
699 case UVC_VS_FORMAT_UNCOMPRESSED:
700 case UVC_VS_FORMAT_MJPEG:
701 case UVC_VS_FORMAT_FRAME_BASED:
702 nformats++;
703 break;
704
705 case UVC_VS_FORMAT_DV:
706 /* DV format has no frame descriptor. We will create a
707 * dummy frame descriptor with a dummy frame interval.
708 */
709 nformats++;
710 nframes++;
711 nintervals++;
712 break;
713
714 case UVC_VS_FORMAT_MPEG2TS:
715 case UVC_VS_FORMAT_STREAM_BASED:
716 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
717 "interface %d FORMAT %u is not supported.\n",
718 dev->udev->devnum,
719 alts->desc.bInterfaceNumber, _buffer[2]);
720 break;
721
722 case UVC_VS_FRAME_UNCOMPRESSED:
723 case UVC_VS_FRAME_MJPEG:
724 nframes++;
725 if (_buflen > 25)
726 nintervals += _buffer[25] ? _buffer[25] : 3;
727 break;
728
729 case UVC_VS_FRAME_FRAME_BASED:
730 nframes++;
731 if (_buflen > 21)
732 nintervals += _buffer[21] ? _buffer[21] : 3;
733 break;
734 }
735
736 _buflen -= _buffer[0];
737 _buffer += _buffer[0];
738 }
739
740 if (nformats == 0) {
741 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
742 "%d has no supported formats defined.\n",
743 dev->udev->devnum, alts->desc.bInterfaceNumber);
744 goto error;
745 }
746
747 size = nformats * sizeof *format + nframes * sizeof *frame
748 + nintervals * sizeof *interval;
749 format = kzalloc(size, GFP_KERNEL);
750 if (format == NULL) {
751 ret = -ENOMEM;
752 goto error;
753 }
754
755 frame = (struct uvc_frame *)&format[nformats];
756 interval = (__u32 *)&frame[nframes];
757
758 streaming->format = format;
759 streaming->nformats = nformats;
760
761 /* Parse the format descriptors. */
762 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
763 switch (buffer[2]) {
764 case UVC_VS_FORMAT_UNCOMPRESSED:
765 case UVC_VS_FORMAT_MJPEG:
766 case UVC_VS_FORMAT_DV:
767 case UVC_VS_FORMAT_FRAME_BASED:
768 format->frame = frame;
769 ret = uvc_parse_format(dev, streaming, format,
770 &interval, buffer, buflen);
771 if (ret < 0)
772 goto error;
773
774 frame += format->nframes;
775 format++;
776
777 buflen -= ret;
778 buffer += ret;
779 continue;
780
781 default:
782 break;
783 }
784
785 buflen -= buffer[0];
786 buffer += buffer[0];
787 }
788
789 if (buflen)
790 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
791 "%d has %u bytes of trailing descriptor garbage.\n",
792 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
793
794 /* Parse the alternate settings to find the maximum bandwidth. */
795 for (i = 0; i < intf->num_altsetting; ++i) {
796 struct usb_host_endpoint *ep;
797 alts = &intf->altsetting[i];
798 ep = uvc_find_endpoint(alts,
799 streaming->header.bEndpointAddress);
800 if (ep == NULL)
801 continue;
802
803 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
804 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
805 if (psize > streaming->maxpsize)
806 streaming->maxpsize = psize;
807 }
808
809 list_add_tail(&streaming->list, &dev->streams);
810 return 0;
811
812 error:
813 usb_driver_release_interface(&uvc_driver.driver, intf);
814 usb_put_intf(intf);
815 kfree(streaming->format);
816 kfree(streaming->header.bmaControls);
817 kfree(streaming);
818 return ret;
819 }
820
821 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
822 unsigned int num_pads, unsigned int extra_size)
823 {
824 struct uvc_entity *entity;
825 unsigned int num_inputs;
826 unsigned int size;
827 unsigned int i;
828
829 extra_size = ALIGN(extra_size, sizeof(*entity->pads));
830 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
831 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
832 + num_inputs;
833 entity = kzalloc(size, GFP_KERNEL);
834 if (entity == NULL)
835 return NULL;
836
837 entity->id = id;
838 entity->type = type;
839
840 entity->num_links = 0;
841 entity->num_pads = num_pads;
842 entity->pads = ((void *)(entity + 1)) + extra_size;
843
844 for (i = 0; i < num_inputs; ++i)
845 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
846 if (!UVC_ENTITY_IS_OTERM(entity))
847 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
848
849 entity->bNrInPins = num_inputs;
850 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
851
852 return entity;
853 }
854
855 /* Parse vendor-specific extensions. */
856 static int uvc_parse_vendor_control(struct uvc_device *dev,
857 const unsigned char *buffer, int buflen)
858 {
859 struct usb_device *udev = dev->udev;
860 struct usb_host_interface *alts = dev->intf->cur_altsetting;
861 struct uvc_entity *unit;
862 unsigned int n, p;
863 int handled = 0;
864
865 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
866 case 0x046d: /* Logitech */
867 if (buffer[1] != 0x41 || buffer[2] != 0x01)
868 break;
869
870 /* Logitech implements several vendor specific functions
871 * through vendor specific extension units (LXU).
872 *
873 * The LXU descriptors are similar to XU descriptors
874 * (see "USB Device Video Class for Video Devices", section
875 * 3.7.2.6 "Extension Unit Descriptor") with the following
876 * differences:
877 *
878 * ----------------------------------------------------------
879 * 0 bLength 1 Number
880 * Size of this descriptor, in bytes: 24+p+n*2
881 * ----------------------------------------------------------
882 * 23+p+n bmControlsType N Bitmap
883 * Individual bits in the set are defined:
884 * 0: Absolute
885 * 1: Relative
886 *
887 * This bitset is mapped exactly the same as bmControls.
888 * ----------------------------------------------------------
889 * 23+p+n*2 bReserved 1 Boolean
890 * ----------------------------------------------------------
891 * 24+p+n*2 iExtension 1 Index
892 * Index of a string descriptor that describes this
893 * extension unit.
894 * ----------------------------------------------------------
895 */
896 p = buflen >= 22 ? buffer[21] : 0;
897 n = buflen >= 25 + p ? buffer[22+p] : 0;
898
899 if (buflen < 25 + p + 2*n) {
900 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
901 "interface %d EXTENSION_UNIT error\n",
902 udev->devnum, alts->desc.bInterfaceNumber);
903 break;
904 }
905
906 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
907 p + 1, 2*n);
908 if (unit == NULL)
909 return -ENOMEM;
910
911 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
912 unit->extension.bNumControls = buffer[20];
913 memcpy(unit->baSourceID, &buffer[22], p);
914 unit->extension.bControlSize = buffer[22+p];
915 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
916 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
917 + n;
918 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
919
920 if (buffer[24+p+2*n] != 0)
921 usb_string(udev, buffer[24+p+2*n], unit->name,
922 sizeof unit->name);
923 else
924 sprintf(unit->name, "Extension %u", buffer[3]);
925
926 list_add_tail(&unit->list, &dev->entities);
927 handled = 1;
928 break;
929 }
930
931 return handled;
932 }
933
934 static int uvc_parse_standard_control(struct uvc_device *dev,
935 const unsigned char *buffer, int buflen)
936 {
937 struct usb_device *udev = dev->udev;
938 struct uvc_entity *unit, *term;
939 struct usb_interface *intf;
940 struct usb_host_interface *alts = dev->intf->cur_altsetting;
941 unsigned int i, n, p, len;
942 __u16 type;
943
944 switch (buffer[2]) {
945 case UVC_VC_HEADER:
946 n = buflen >= 12 ? buffer[11] : 0;
947
948 if (buflen < 12 + n) {
949 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
950 "interface %d HEADER error\n", udev->devnum,
951 alts->desc.bInterfaceNumber);
952 return -EINVAL;
953 }
954
955 dev->uvc_version = get_unaligned_le16(&buffer[3]);
956 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
957
958 /* Parse all USB Video Streaming interfaces. */
959 for (i = 0; i < n; ++i) {
960 intf = usb_ifnum_to_if(udev, buffer[12+i]);
961 if (intf == NULL) {
962 uvc_trace(UVC_TRACE_DESCR, "device %d "
963 "interface %d doesn't exists\n",
964 udev->devnum, i);
965 continue;
966 }
967
968 uvc_parse_streaming(dev, intf);
969 }
970 break;
971
972 case UVC_VC_INPUT_TERMINAL:
973 if (buflen < 8) {
974 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
975 "interface %d INPUT_TERMINAL error\n",
976 udev->devnum, alts->desc.bInterfaceNumber);
977 return -EINVAL;
978 }
979
980 /* Make sure the terminal type MSB is not null, otherwise it
981 * could be confused with a unit.
982 */
983 type = get_unaligned_le16(&buffer[4]);
984 if ((type & 0xff00) == 0) {
985 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
986 "interface %d INPUT_TERMINAL %d has invalid "
987 "type 0x%04x, skipping\n", udev->devnum,
988 alts->desc.bInterfaceNumber,
989 buffer[3], type);
990 return 0;
991 }
992
993 n = 0;
994 p = 0;
995 len = 8;
996
997 if (type == UVC_ITT_CAMERA) {
998 n = buflen >= 15 ? buffer[14] : 0;
999 len = 15;
1000
1001 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1002 n = buflen >= 9 ? buffer[8] : 0;
1003 p = buflen >= 10 + n ? buffer[9+n] : 0;
1004 len = 10;
1005 }
1006
1007 if (buflen < len + n + p) {
1008 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1009 "interface %d INPUT_TERMINAL error\n",
1010 udev->devnum, alts->desc.bInterfaceNumber);
1011 return -EINVAL;
1012 }
1013
1014 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1015 1, n + p);
1016 if (term == NULL)
1017 return -ENOMEM;
1018
1019 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1020 term->camera.bControlSize = n;
1021 term->camera.bmControls = (__u8 *)term + sizeof *term;
1022 term->camera.wObjectiveFocalLengthMin =
1023 get_unaligned_le16(&buffer[8]);
1024 term->camera.wObjectiveFocalLengthMax =
1025 get_unaligned_le16(&buffer[10]);
1026 term->camera.wOcularFocalLength =
1027 get_unaligned_le16(&buffer[12]);
1028 memcpy(term->camera.bmControls, &buffer[15], n);
1029 } else if (UVC_ENTITY_TYPE(term) ==
1030 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1031 term->media.bControlSize = n;
1032 term->media.bmControls = (__u8 *)term + sizeof *term;
1033 term->media.bTransportModeSize = p;
1034 term->media.bmTransportModes = (__u8 *)term
1035 + sizeof *term + n;
1036 memcpy(term->media.bmControls, &buffer[9], n);
1037 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1038 }
1039
1040 if (buffer[7] != 0)
1041 usb_string(udev, buffer[7], term->name,
1042 sizeof term->name);
1043 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1044 sprintf(term->name, "Camera %u", buffer[3]);
1045 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1046 sprintf(term->name, "Media %u", buffer[3]);
1047 else
1048 sprintf(term->name, "Input %u", buffer[3]);
1049
1050 list_add_tail(&term->list, &dev->entities);
1051 break;
1052
1053 case UVC_VC_OUTPUT_TERMINAL:
1054 if (buflen < 9) {
1055 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1056 "interface %d OUTPUT_TERMINAL error\n",
1057 udev->devnum, alts->desc.bInterfaceNumber);
1058 return -EINVAL;
1059 }
1060
1061 /* Make sure the terminal type MSB is not null, otherwise it
1062 * could be confused with a unit.
1063 */
1064 type = get_unaligned_le16(&buffer[4]);
1065 if ((type & 0xff00) == 0) {
1066 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1067 "interface %d OUTPUT_TERMINAL %d has invalid "
1068 "type 0x%04x, skipping\n", udev->devnum,
1069 alts->desc.bInterfaceNumber, buffer[3], type);
1070 return 0;
1071 }
1072
1073 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1074 1, 0);
1075 if (term == NULL)
1076 return -ENOMEM;
1077
1078 memcpy(term->baSourceID, &buffer[7], 1);
1079
1080 if (buffer[8] != 0)
1081 usb_string(udev, buffer[8], term->name,
1082 sizeof term->name);
1083 else
1084 sprintf(term->name, "Output %u", buffer[3]);
1085
1086 list_add_tail(&term->list, &dev->entities);
1087 break;
1088
1089 case UVC_VC_SELECTOR_UNIT:
1090 p = buflen >= 5 ? buffer[4] : 0;
1091
1092 if (buflen < 5 || buflen < 6 + p) {
1093 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1094 "interface %d SELECTOR_UNIT error\n",
1095 udev->devnum, alts->desc.bInterfaceNumber);
1096 return -EINVAL;
1097 }
1098
1099 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1100 if (unit == NULL)
1101 return -ENOMEM;
1102
1103 memcpy(unit->baSourceID, &buffer[5], p);
1104
1105 if (buffer[5+p] != 0)
1106 usb_string(udev, buffer[5+p], unit->name,
1107 sizeof unit->name);
1108 else
1109 sprintf(unit->name, "Selector %u", buffer[3]);
1110
1111 list_add_tail(&unit->list, &dev->entities);
1112 break;
1113
1114 case UVC_VC_PROCESSING_UNIT:
1115 n = buflen >= 8 ? buffer[7] : 0;
1116 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1117
1118 if (buflen < p + n) {
1119 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1120 "interface %d PROCESSING_UNIT error\n",
1121 udev->devnum, alts->desc.bInterfaceNumber);
1122 return -EINVAL;
1123 }
1124
1125 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1126 if (unit == NULL)
1127 return -ENOMEM;
1128
1129 memcpy(unit->baSourceID, &buffer[4], 1);
1130 unit->processing.wMaxMultiplier =
1131 get_unaligned_le16(&buffer[5]);
1132 unit->processing.bControlSize = buffer[7];
1133 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1134 memcpy(unit->processing.bmControls, &buffer[8], n);
1135 if (dev->uvc_version >= 0x0110)
1136 unit->processing.bmVideoStandards = buffer[9+n];
1137
1138 if (buffer[8+n] != 0)
1139 usb_string(udev, buffer[8+n], unit->name,
1140 sizeof unit->name);
1141 else
1142 sprintf(unit->name, "Processing %u", buffer[3]);
1143
1144 list_add_tail(&unit->list, &dev->entities);
1145 break;
1146
1147 case UVC_VC_EXTENSION_UNIT:
1148 p = buflen >= 22 ? buffer[21] : 0;
1149 n = buflen >= 24 + p ? buffer[22+p] : 0;
1150
1151 if (buflen < 24 + p + n) {
1152 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1153 "interface %d EXTENSION_UNIT error\n",
1154 udev->devnum, alts->desc.bInterfaceNumber);
1155 return -EINVAL;
1156 }
1157
1158 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1159 if (unit == NULL)
1160 return -ENOMEM;
1161
1162 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1163 unit->extension.bNumControls = buffer[20];
1164 memcpy(unit->baSourceID, &buffer[22], p);
1165 unit->extension.bControlSize = buffer[22+p];
1166 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
1167 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1168
1169 if (buffer[23+p+n] != 0)
1170 usb_string(udev, buffer[23+p+n], unit->name,
1171 sizeof unit->name);
1172 else
1173 sprintf(unit->name, "Extension %u", buffer[3]);
1174
1175 list_add_tail(&unit->list, &dev->entities);
1176 break;
1177
1178 default:
1179 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1180 "descriptor (%u)\n", buffer[2]);
1181 break;
1182 }
1183
1184 return 0;
1185 }
1186
1187 static int uvc_parse_control(struct uvc_device *dev)
1188 {
1189 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1190 unsigned char *buffer = alts->extra;
1191 int buflen = alts->extralen;
1192 int ret;
1193
1194 /* Parse the default alternate setting only, as the UVC specification
1195 * defines a single alternate setting, the default alternate setting
1196 * zero.
1197 */
1198
1199 while (buflen > 2) {
1200 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1201 buffer[1] != USB_DT_CS_INTERFACE)
1202 goto next_descriptor;
1203
1204 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1205 return ret;
1206
1207 next_descriptor:
1208 buflen -= buffer[0];
1209 buffer += buffer[0];
1210 }
1211
1212 /* Check if the optional status endpoint is present. Built-in iSight
1213 * webcams have an interrupt endpoint but spit proprietary data that
1214 * don't conform to the UVC status endpoint messages. Don't try to
1215 * handle the interrupt endpoint for those cameras.
1216 */
1217 if (alts->desc.bNumEndpoints == 1 &&
1218 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1219 struct usb_host_endpoint *ep = &alts->endpoint[0];
1220 struct usb_endpoint_descriptor *desc = &ep->desc;
1221
1222 if (usb_endpoint_is_int_in(desc) &&
1223 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1224 desc->bInterval != 0) {
1225 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1226 "(addr %02x).\n", desc->bEndpointAddress);
1227 dev->int_ep = ep;
1228 }
1229 }
1230
1231 return 0;
1232 }
1233
1234 /* ------------------------------------------------------------------------
1235 * UVC device scan
1236 */
1237
1238 /*
1239 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1240 * and containing the following units:
1241 *
1242 * - one or more Output Terminals (USB Streaming or Display)
1243 * - zero or one Processing Unit
1244 * - zero, one or more single-input Selector Units
1245 * - zero or one multiple-input Selector Units, provided all inputs are
1246 * connected to input terminals
1247 * - zero, one or mode single-input Extension Units
1248 * - one or more Input Terminals (Camera, External or USB Streaming)
1249 *
1250 * The terminal and units must match on of the following structures:
1251 *
1252 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1253 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1254 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1255 *
1256 * +---------+ +---------+ -> OTT_*(0)
1257 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1258 * +---------+ +---------+ -> OTT_*(n)
1259 *
1260 * The Processing Unit and Extension Units can be in any order. Additional
1261 * Extension Units connected to the main chain as single-unit branches are
1262 * also supported. Single-input Selector Units are ignored.
1263 */
1264 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1265 struct uvc_entity *entity)
1266 {
1267 switch (UVC_ENTITY_TYPE(entity)) {
1268 case UVC_VC_EXTENSION_UNIT:
1269 if (uvc_trace_param & UVC_TRACE_PROBE)
1270 printk(" <- XU %d", entity->id);
1271
1272 if (entity->bNrInPins != 1) {
1273 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1274 "than 1 input pin.\n", entity->id);
1275 return -1;
1276 }
1277
1278 break;
1279
1280 case UVC_VC_PROCESSING_UNIT:
1281 if (uvc_trace_param & UVC_TRACE_PROBE)
1282 printk(" <- PU %d", entity->id);
1283
1284 if (chain->processing != NULL) {
1285 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1286 "Processing Units in chain.\n");
1287 return -1;
1288 }
1289
1290 chain->processing = entity;
1291 break;
1292
1293 case UVC_VC_SELECTOR_UNIT:
1294 if (uvc_trace_param & UVC_TRACE_PROBE)
1295 printk(" <- SU %d", entity->id);
1296
1297 /* Single-input selector units are ignored. */
1298 if (entity->bNrInPins == 1)
1299 break;
1300
1301 if (chain->selector != NULL) {
1302 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1303 "Units in chain.\n");
1304 return -1;
1305 }
1306
1307 chain->selector = entity;
1308 break;
1309
1310 case UVC_ITT_VENDOR_SPECIFIC:
1311 case UVC_ITT_CAMERA:
1312 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1313 if (uvc_trace_param & UVC_TRACE_PROBE)
1314 printk(" <- IT %d\n", entity->id);
1315
1316 break;
1317
1318 case UVC_OTT_VENDOR_SPECIFIC:
1319 case UVC_OTT_DISPLAY:
1320 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1321 if (uvc_trace_param & UVC_TRACE_PROBE)
1322 printk(" OT %d", entity->id);
1323
1324 break;
1325
1326 case UVC_TT_STREAMING:
1327 if (UVC_ENTITY_IS_ITERM(entity)) {
1328 if (uvc_trace_param & UVC_TRACE_PROBE)
1329 printk(" <- IT %d\n", entity->id);
1330 } else {
1331 if (uvc_trace_param & UVC_TRACE_PROBE)
1332 printk(" OT %d", entity->id);
1333 }
1334
1335 break;
1336
1337 default:
1338 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1339 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1340 return -1;
1341 }
1342
1343 list_add_tail(&entity->chain, &chain->entities);
1344 return 0;
1345 }
1346
1347 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1348 struct uvc_entity *entity, struct uvc_entity *prev)
1349 {
1350 struct uvc_entity *forward;
1351 int found;
1352
1353 /* Forward scan */
1354 forward = NULL;
1355 found = 0;
1356
1357 while (1) {
1358 forward = uvc_entity_by_reference(chain->dev, entity->id,
1359 forward);
1360 if (forward == NULL)
1361 break;
1362 if (forward == prev)
1363 continue;
1364
1365 switch (UVC_ENTITY_TYPE(forward)) {
1366 case UVC_VC_EXTENSION_UNIT:
1367 if (forward->bNrInPins != 1) {
1368 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1369 "has more than 1 input pin.\n",
1370 entity->id);
1371 return -EINVAL;
1372 }
1373
1374 list_add_tail(&forward->chain, &chain->entities);
1375 if (uvc_trace_param & UVC_TRACE_PROBE) {
1376 if (!found)
1377 printk(" (->");
1378
1379 printk(" XU %d", forward->id);
1380 found = 1;
1381 }
1382 break;
1383
1384 case UVC_OTT_VENDOR_SPECIFIC:
1385 case UVC_OTT_DISPLAY:
1386 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1387 case UVC_TT_STREAMING:
1388 if (UVC_ENTITY_IS_ITERM(forward)) {
1389 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1390 "terminal %u.\n", forward->id);
1391 return -EINVAL;
1392 }
1393
1394 list_add_tail(&forward->chain, &chain->entities);
1395 if (uvc_trace_param & UVC_TRACE_PROBE) {
1396 if (!found)
1397 printk(" (->");
1398
1399 printk(" OT %d", forward->id);
1400 found = 1;
1401 }
1402 break;
1403 }
1404 }
1405 if (found)
1406 printk(")");
1407
1408 return 0;
1409 }
1410
1411 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1412 struct uvc_entity **_entity)
1413 {
1414 struct uvc_entity *entity = *_entity;
1415 struct uvc_entity *term;
1416 int id = -EINVAL, i;
1417
1418 switch (UVC_ENTITY_TYPE(entity)) {
1419 case UVC_VC_EXTENSION_UNIT:
1420 case UVC_VC_PROCESSING_UNIT:
1421 id = entity->baSourceID[0];
1422 break;
1423
1424 case UVC_VC_SELECTOR_UNIT:
1425 /* Single-input selector units are ignored. */
1426 if (entity->bNrInPins == 1) {
1427 id = entity->baSourceID[0];
1428 break;
1429 }
1430
1431 if (uvc_trace_param & UVC_TRACE_PROBE)
1432 printk(" <- IT");
1433
1434 chain->selector = entity;
1435 for (i = 0; i < entity->bNrInPins; ++i) {
1436 id = entity->baSourceID[i];
1437 term = uvc_entity_by_id(chain->dev, id);
1438 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1439 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1440 "input %d isn't connected to an "
1441 "input terminal\n", entity->id, i);
1442 return -1;
1443 }
1444
1445 if (uvc_trace_param & UVC_TRACE_PROBE)
1446 printk(" %d", term->id);
1447
1448 list_add_tail(&term->chain, &chain->entities);
1449 uvc_scan_chain_forward(chain, term, entity);
1450 }
1451
1452 if (uvc_trace_param & UVC_TRACE_PROBE)
1453 printk("\n");
1454
1455 id = 0;
1456 break;
1457
1458 case UVC_ITT_VENDOR_SPECIFIC:
1459 case UVC_ITT_CAMERA:
1460 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1461 case UVC_OTT_VENDOR_SPECIFIC:
1462 case UVC_OTT_DISPLAY:
1463 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1464 case UVC_TT_STREAMING:
1465 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1466 break;
1467 }
1468
1469 if (id <= 0) {
1470 *_entity = NULL;
1471 return id;
1472 }
1473
1474 entity = uvc_entity_by_id(chain->dev, id);
1475 if (entity == NULL) {
1476 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1477 "unknown entity %d.\n", id);
1478 return -EINVAL;
1479 }
1480
1481 *_entity = entity;
1482 return 0;
1483 }
1484
1485 static int uvc_scan_chain(struct uvc_video_chain *chain,
1486 struct uvc_entity *term)
1487 {
1488 struct uvc_entity *entity, *prev;
1489
1490 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1491
1492 entity = term;
1493 prev = NULL;
1494
1495 while (entity != NULL) {
1496 /* Entity must not be part of an existing chain */
1497 if (entity->chain.next || entity->chain.prev) {
1498 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1499 "entity %d already in chain.\n", entity->id);
1500 return -EINVAL;
1501 }
1502
1503 /* Process entity */
1504 if (uvc_scan_chain_entity(chain, entity) < 0)
1505 return -EINVAL;
1506
1507 /* Forward scan */
1508 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1509 return -EINVAL;
1510
1511 /* Backward scan */
1512 prev = entity;
1513 if (uvc_scan_chain_backward(chain, &entity) < 0)
1514 return -EINVAL;
1515 }
1516
1517 return 0;
1518 }
1519
1520 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1521 char *buffer)
1522 {
1523 struct uvc_entity *term;
1524 unsigned int nterms = 0;
1525 char *p = buffer;
1526
1527 list_for_each_entry(term, terms, chain) {
1528 if (!UVC_ENTITY_IS_TERM(term) ||
1529 UVC_TERM_DIRECTION(term) != dir)
1530 continue;
1531
1532 if (nterms)
1533 p += sprintf(p, ",");
1534 if (++nterms >= 4) {
1535 p += sprintf(p, "...");
1536 break;
1537 }
1538 p += sprintf(p, "%u", term->id);
1539 }
1540
1541 return p - buffer;
1542 }
1543
1544 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1545 {
1546 static char buffer[43];
1547 char *p = buffer;
1548
1549 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1550 p += sprintf(p, " -> ");
1551 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1552
1553 return buffer;
1554 }
1555
1556 /*
1557 * Scan the device for video chains and register video devices.
1558 *
1559 * Chains are scanned starting at their output terminals and walked backwards.
1560 */
1561 static int uvc_scan_device(struct uvc_device *dev)
1562 {
1563 struct uvc_video_chain *chain;
1564 struct uvc_entity *term;
1565
1566 list_for_each_entry(term, &dev->entities, list) {
1567 if (!UVC_ENTITY_IS_OTERM(term))
1568 continue;
1569
1570 /* If the terminal is already included in a chain, skip it.
1571 * This can happen for chains that have multiple output
1572 * terminals, where all output terminals beside the first one
1573 * will be inserted in the chain in forward scans.
1574 */
1575 if (term->chain.next || term->chain.prev)
1576 continue;
1577
1578 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1579 if (chain == NULL)
1580 return -ENOMEM;
1581
1582 INIT_LIST_HEAD(&chain->entities);
1583 mutex_init(&chain->ctrl_mutex);
1584 chain->dev = dev;
1585 v4l2_prio_init(&chain->prio);
1586
1587 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1588
1589 if (uvc_scan_chain(chain, term) < 0) {
1590 kfree(chain);
1591 continue;
1592 }
1593
1594 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1595 uvc_print_chain(chain));
1596
1597 list_add_tail(&chain->list, &dev->chains);
1598 }
1599
1600 if (list_empty(&dev->chains)) {
1601 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1602 return -1;
1603 }
1604
1605 return 0;
1606 }
1607
1608 /* ------------------------------------------------------------------------
1609 * Video device registration and unregistration
1610 */
1611
1612 /*
1613 * Delete the UVC device.
1614 *
1615 * Called by the kernel when the last reference to the uvc_device structure
1616 * is released.
1617 *
1618 * As this function is called after or during disconnect(), all URBs have
1619 * already been canceled by the USB core. There is no need to kill the
1620 * interrupt URB manually.
1621 */
1622 static void uvc_delete(struct uvc_device *dev)
1623 {
1624 struct list_head *p, *n;
1625
1626 usb_put_intf(dev->intf);
1627 usb_put_dev(dev->udev);
1628
1629 uvc_status_cleanup(dev);
1630 uvc_ctrl_cleanup_device(dev);
1631
1632 if (dev->vdev.dev)
1633 v4l2_device_unregister(&dev->vdev);
1634 #ifdef CONFIG_MEDIA_CONTROLLER
1635 if (media_devnode_is_registered(&dev->mdev.devnode))
1636 media_device_unregister(&dev->mdev);
1637 #endif
1638
1639 list_for_each_safe(p, n, &dev->chains) {
1640 struct uvc_video_chain *chain;
1641 chain = list_entry(p, struct uvc_video_chain, list);
1642 kfree(chain);
1643 }
1644
1645 list_for_each_safe(p, n, &dev->entities) {
1646 struct uvc_entity *entity;
1647 entity = list_entry(p, struct uvc_entity, list);
1648 #ifdef CONFIG_MEDIA_CONTROLLER
1649 uvc_mc_cleanup_entity(entity);
1650 #endif
1651 if (entity->vdev) {
1652 video_device_release(entity->vdev);
1653 entity->vdev = NULL;
1654 }
1655 kfree(entity);
1656 }
1657
1658 list_for_each_safe(p, n, &dev->streams) {
1659 struct uvc_streaming *streaming;
1660 streaming = list_entry(p, struct uvc_streaming, list);
1661 usb_driver_release_interface(&uvc_driver.driver,
1662 streaming->intf);
1663 usb_put_intf(streaming->intf);
1664 kfree(streaming->format);
1665 kfree(streaming->header.bmaControls);
1666 kfree(streaming);
1667 }
1668
1669 kfree(dev);
1670 }
1671
1672 static void uvc_release(struct video_device *vdev)
1673 {
1674 struct uvc_streaming *stream = video_get_drvdata(vdev);
1675 struct uvc_device *dev = stream->dev;
1676
1677 /* Decrement the registered streams count and delete the device when it
1678 * reaches zero.
1679 */
1680 if (atomic_dec_and_test(&dev->nstreams))
1681 uvc_delete(dev);
1682 }
1683
1684 /*
1685 * Unregister the video devices.
1686 */
1687 static void uvc_unregister_video(struct uvc_device *dev)
1688 {
1689 struct uvc_streaming *stream;
1690
1691 /* Unregistering all video devices might result in uvc_delete() being
1692 * called from inside the loop if there's no open file handle. To avoid
1693 * that, increment the stream count before iterating over the streams
1694 * and decrement it when done.
1695 */
1696 atomic_inc(&dev->nstreams);
1697
1698 list_for_each_entry(stream, &dev->streams, list) {
1699 if (stream->vdev == NULL)
1700 continue;
1701
1702 video_unregister_device(stream->vdev);
1703 stream->vdev = NULL;
1704
1705 uvc_debugfs_cleanup_stream(stream);
1706 }
1707
1708 /* Decrement the stream count and call uvc_delete explicitly if there
1709 * are no stream left.
1710 */
1711 if (atomic_dec_and_test(&dev->nstreams))
1712 uvc_delete(dev);
1713 }
1714
1715 static int uvc_register_video(struct uvc_device *dev,
1716 struct uvc_streaming *stream)
1717 {
1718 struct video_device *vdev;
1719 int ret;
1720
1721 /* Initialize the streaming interface with default streaming
1722 * parameters.
1723 */
1724 ret = uvc_video_init(stream);
1725 if (ret < 0) {
1726 uvc_printk(KERN_ERR, "Failed to initialize the device "
1727 "(%d).\n", ret);
1728 return ret;
1729 }
1730
1731 uvc_debugfs_init_stream(stream);
1732
1733 /* Register the device with V4L. */
1734 vdev = video_device_alloc();
1735 if (vdev == NULL) {
1736 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n",
1737 ret);
1738 return -ENOMEM;
1739 }
1740
1741 /* We already hold a reference to dev->udev. The video device will be
1742 * unregistered before the reference is released, so we don't need to
1743 * get another one.
1744 */
1745 vdev->v4l2_dev = &dev->vdev;
1746 vdev->fops = &uvc_fops;
1747 vdev->release = uvc_release;
1748 vdev->prio = &stream->chain->prio;
1749 set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
1750 if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1751 vdev->vfl_dir = VFL_DIR_TX;
1752 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1753
1754 /* Set the driver data before calling video_register_device, otherwise
1755 * uvc_v4l2_open might race us.
1756 */
1757 stream->vdev = vdev;
1758 video_set_drvdata(vdev, stream);
1759
1760 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1761 if (ret < 0) {
1762 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
1763 ret);
1764 stream->vdev = NULL;
1765 video_device_release(vdev);
1766 return ret;
1767 }
1768
1769 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1770 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE;
1771 else
1772 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1773
1774 atomic_inc(&dev->nstreams);
1775 return 0;
1776 }
1777
1778 /*
1779 * Register all video devices in all chains.
1780 */
1781 static int uvc_register_terms(struct uvc_device *dev,
1782 struct uvc_video_chain *chain)
1783 {
1784 struct uvc_streaming *stream;
1785 struct uvc_entity *term;
1786 int ret;
1787
1788 list_for_each_entry(term, &chain->entities, chain) {
1789 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1790 continue;
1791
1792 stream = uvc_stream_by_id(dev, term->id);
1793 if (stream == NULL) {
1794 uvc_printk(KERN_INFO, "No streaming interface found "
1795 "for terminal %u.", term->id);
1796 continue;
1797 }
1798
1799 stream->chain = chain;
1800 ret = uvc_register_video(dev, stream);
1801 if (ret < 0)
1802 return ret;
1803
1804 term->vdev = stream->vdev;
1805 }
1806
1807 return 0;
1808 }
1809
1810 static int uvc_register_chains(struct uvc_device *dev)
1811 {
1812 struct uvc_video_chain *chain;
1813 int ret;
1814
1815 list_for_each_entry(chain, &dev->chains, list) {
1816 ret = uvc_register_terms(dev, chain);
1817 if (ret < 0)
1818 return ret;
1819
1820 #ifdef CONFIG_MEDIA_CONTROLLER
1821 ret = uvc_mc_register_entities(chain);
1822 if (ret < 0) {
1823 uvc_printk(KERN_INFO, "Failed to register entites "
1824 "(%d).\n", ret);
1825 }
1826 #endif
1827 }
1828
1829 return 0;
1830 }
1831
1832 /* ------------------------------------------------------------------------
1833 * USB probe, disconnect, suspend and resume
1834 */
1835
1836 static int uvc_probe(struct usb_interface *intf,
1837 const struct usb_device_id *id)
1838 {
1839 struct usb_device *udev = interface_to_usbdev(intf);
1840 struct uvc_device *dev;
1841 int ret;
1842
1843 if (id->idVendor && id->idProduct)
1844 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1845 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1846 id->idProduct);
1847 else
1848 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1849 udev->devpath);
1850
1851 /* Allocate memory for the device and initialize it. */
1852 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1853 return -ENOMEM;
1854
1855 INIT_LIST_HEAD(&dev->entities);
1856 INIT_LIST_HEAD(&dev->chains);
1857 INIT_LIST_HEAD(&dev->streams);
1858 atomic_set(&dev->nstreams, 0);
1859 atomic_set(&dev->nmappings, 0);
1860 mutex_init(&dev->lock);
1861
1862 dev->udev = usb_get_dev(udev);
1863 dev->intf = usb_get_intf(intf);
1864 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1865 dev->quirks = (uvc_quirks_param == -1)
1866 ? id->driver_info : uvc_quirks_param;
1867
1868 if (udev->product != NULL)
1869 strlcpy(dev->name, udev->product, sizeof dev->name);
1870 else
1871 snprintf(dev->name, sizeof dev->name,
1872 "UVC Camera (%04x:%04x)",
1873 le16_to_cpu(udev->descriptor.idVendor),
1874 le16_to_cpu(udev->descriptor.idProduct));
1875
1876 /* Parse the Video Class control descriptor. */
1877 if (uvc_parse_control(dev) < 0) {
1878 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1879 "descriptors.\n");
1880 goto error;
1881 }
1882
1883 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1884 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1885 udev->product ? udev->product : "<unnamed>",
1886 le16_to_cpu(udev->descriptor.idVendor),
1887 le16_to_cpu(udev->descriptor.idProduct));
1888
1889 if (dev->quirks != id->driver_info) {
1890 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
1891 "parameter for testing purpose.\n", dev->quirks);
1892 uvc_printk(KERN_INFO, "Please report required quirks to the "
1893 "linux-uvc-devel mailing list.\n");
1894 }
1895
1896 /* Register the media and V4L2 devices. */
1897 #ifdef CONFIG_MEDIA_CONTROLLER
1898 dev->mdev.dev = &intf->dev;
1899 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
1900 if (udev->serial)
1901 strlcpy(dev->mdev.serial, udev->serial,
1902 sizeof(dev->mdev.serial));
1903 strcpy(dev->mdev.bus_info, udev->devpath);
1904 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
1905 dev->mdev.driver_version = LINUX_VERSION_CODE;
1906 if (media_device_register(&dev->mdev) < 0)
1907 goto error;
1908
1909 dev->vdev.mdev = &dev->mdev;
1910 #endif
1911 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
1912 goto error;
1913
1914 /* Initialize controls. */
1915 if (uvc_ctrl_init_device(dev) < 0)
1916 goto error;
1917
1918 /* Scan the device for video chains. */
1919 if (uvc_scan_device(dev) < 0)
1920 goto error;
1921
1922 /* Register video device nodes. */
1923 if (uvc_register_chains(dev) < 0)
1924 goto error;
1925
1926 /* Save our data pointer in the interface data. */
1927 usb_set_intfdata(intf, dev);
1928
1929 /* Initialize the interrupt URB. */
1930 if ((ret = uvc_status_init(dev)) < 0) {
1931 uvc_printk(KERN_INFO, "Unable to initialize the status "
1932 "endpoint (%d), status interrupt will not be "
1933 "supported.\n", ret);
1934 }
1935
1936 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1937 usb_enable_autosuspend(udev);
1938 return 0;
1939
1940 error:
1941 uvc_unregister_video(dev);
1942 return -ENODEV;
1943 }
1944
1945 static void uvc_disconnect(struct usb_interface *intf)
1946 {
1947 struct uvc_device *dev = usb_get_intfdata(intf);
1948
1949 /* Set the USB interface data to NULL. This can be done outside the
1950 * lock, as there's no other reader.
1951 */
1952 usb_set_intfdata(intf, NULL);
1953
1954 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1955 UVC_SC_VIDEOSTREAMING)
1956 return;
1957
1958 dev->state |= UVC_DEV_DISCONNECTED;
1959
1960 uvc_unregister_video(dev);
1961 }
1962
1963 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1964 {
1965 struct uvc_device *dev = usb_get_intfdata(intf);
1966 struct uvc_streaming *stream;
1967
1968 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1969 intf->cur_altsetting->desc.bInterfaceNumber);
1970
1971 /* Controls are cached on the fly so they don't need to be saved. */
1972 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1973 UVC_SC_VIDEOCONTROL) {
1974 mutex_lock(&dev->lock);
1975 if (dev->users)
1976 uvc_status_stop(dev);
1977 mutex_unlock(&dev->lock);
1978 return 0;
1979 }
1980
1981 list_for_each_entry(stream, &dev->streams, list) {
1982 if (stream->intf == intf)
1983 return uvc_video_suspend(stream);
1984 }
1985
1986 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
1987 "mismatch.\n");
1988 return -EINVAL;
1989 }
1990
1991 static int __uvc_resume(struct usb_interface *intf, int reset)
1992 {
1993 struct uvc_device *dev = usb_get_intfdata(intf);
1994 struct uvc_streaming *stream;
1995
1996 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1997 intf->cur_altsetting->desc.bInterfaceNumber);
1998
1999 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2000 UVC_SC_VIDEOCONTROL) {
2001 int ret = 0;
2002
2003 if (reset) {
2004 ret = uvc_ctrl_resume_device(dev);
2005 if (ret < 0)
2006 return ret;
2007 }
2008
2009 mutex_lock(&dev->lock);
2010 if (dev->users)
2011 ret = uvc_status_start(dev, GFP_NOIO);
2012 mutex_unlock(&dev->lock);
2013
2014 return ret;
2015 }
2016
2017 list_for_each_entry(stream, &dev->streams, list) {
2018 if (stream->intf == intf)
2019 return uvc_video_resume(stream, reset);
2020 }
2021
2022 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2023 "mismatch.\n");
2024 return -EINVAL;
2025 }
2026
2027 static int uvc_resume(struct usb_interface *intf)
2028 {
2029 return __uvc_resume(intf, 0);
2030 }
2031
2032 static int uvc_reset_resume(struct usb_interface *intf)
2033 {
2034 return __uvc_resume(intf, 1);
2035 }
2036
2037 /* ------------------------------------------------------------------------
2038 * Module parameters
2039 */
2040
2041 static int uvc_clock_param_get(char *buffer, struct kernel_param *kp)
2042 {
2043 if (uvc_clock_param == CLOCK_MONOTONIC)
2044 return sprintf(buffer, "CLOCK_MONOTONIC");
2045 else
2046 return sprintf(buffer, "CLOCK_REALTIME");
2047 }
2048
2049 static int uvc_clock_param_set(const char *val, struct kernel_param *kp)
2050 {
2051 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2052 val += strlen("clock_");
2053
2054 if (strcasecmp(val, "monotonic") == 0)
2055 uvc_clock_param = CLOCK_MONOTONIC;
2056 else if (strcasecmp(val, "realtime") == 0)
2057 uvc_clock_param = CLOCK_REALTIME;
2058 else
2059 return -EINVAL;
2060
2061 return 0;
2062 }
2063
2064 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2065 &uvc_clock_param, S_IRUGO|S_IWUSR);
2066 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2067 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2068 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2069 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2070 MODULE_PARM_DESC(quirks, "Forced device quirks");
2071 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2072 MODULE_PARM_DESC(trace, "Trace level bitmask");
2073 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2074 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2075
2076 /* ------------------------------------------------------------------------
2077 * Driver initialization and cleanup
2078 */
2079
2080 /*
2081 * The Logitech cameras listed below have their interface class set to
2082 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2083 * though they are compliant.
2084 */
2085 static struct usb_device_id uvc_ids[] = {
2086 /* LogiLink Wireless Webcam */
2087 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2088 | USB_DEVICE_ID_MATCH_INT_INFO,
2089 .idVendor = 0x0416,
2090 .idProduct = 0xa91a,
2091 .bInterfaceClass = USB_CLASS_VIDEO,
2092 .bInterfaceSubClass = 1,
2093 .bInterfaceProtocol = 0,
2094 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2095 /* Genius eFace 2025 */
2096 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2097 | USB_DEVICE_ID_MATCH_INT_INFO,
2098 .idVendor = 0x0458,
2099 .idProduct = 0x706e,
2100 .bInterfaceClass = USB_CLASS_VIDEO,
2101 .bInterfaceSubClass = 1,
2102 .bInterfaceProtocol = 0,
2103 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2104 /* Microsoft Lifecam NX-6000 */
2105 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2106 | USB_DEVICE_ID_MATCH_INT_INFO,
2107 .idVendor = 0x045e,
2108 .idProduct = 0x00f8,
2109 .bInterfaceClass = USB_CLASS_VIDEO,
2110 .bInterfaceSubClass = 1,
2111 .bInterfaceProtocol = 0,
2112 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2113 /* Microsoft Lifecam NX-3000 */
2114 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2115 | USB_DEVICE_ID_MATCH_INT_INFO,
2116 .idVendor = 0x045e,
2117 .idProduct = 0x0721,
2118 .bInterfaceClass = USB_CLASS_VIDEO,
2119 .bInterfaceSubClass = 1,
2120 .bInterfaceProtocol = 0,
2121 .driver_info = UVC_QUIRK_PROBE_DEF },
2122 /* Microsoft Lifecam VX-7000 */
2123 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2124 | USB_DEVICE_ID_MATCH_INT_INFO,
2125 .idVendor = 0x045e,
2126 .idProduct = 0x0723,
2127 .bInterfaceClass = USB_CLASS_VIDEO,
2128 .bInterfaceSubClass = 1,
2129 .bInterfaceProtocol = 0,
2130 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2131 /* Logitech Quickcam Fusion */
2132 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2133 | USB_DEVICE_ID_MATCH_INT_INFO,
2134 .idVendor = 0x046d,
2135 .idProduct = 0x08c1,
2136 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2137 .bInterfaceSubClass = 1,
2138 .bInterfaceProtocol = 0 },
2139 /* Logitech Quickcam Orbit MP */
2140 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2141 | USB_DEVICE_ID_MATCH_INT_INFO,
2142 .idVendor = 0x046d,
2143 .idProduct = 0x08c2,
2144 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2145 .bInterfaceSubClass = 1,
2146 .bInterfaceProtocol = 0 },
2147 /* Logitech Quickcam Pro for Notebook */
2148 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2149 | USB_DEVICE_ID_MATCH_INT_INFO,
2150 .idVendor = 0x046d,
2151 .idProduct = 0x08c3,
2152 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2153 .bInterfaceSubClass = 1,
2154 .bInterfaceProtocol = 0 },
2155 /* Logitech Quickcam Pro 5000 */
2156 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2157 | USB_DEVICE_ID_MATCH_INT_INFO,
2158 .idVendor = 0x046d,
2159 .idProduct = 0x08c5,
2160 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2161 .bInterfaceSubClass = 1,
2162 .bInterfaceProtocol = 0 },
2163 /* Logitech Quickcam OEM Dell Notebook */
2164 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2165 | USB_DEVICE_ID_MATCH_INT_INFO,
2166 .idVendor = 0x046d,
2167 .idProduct = 0x08c6,
2168 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2169 .bInterfaceSubClass = 1,
2170 .bInterfaceProtocol = 0 },
2171 /* Logitech Quickcam OEM Cisco VT Camera II */
2172 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2173 | USB_DEVICE_ID_MATCH_INT_INFO,
2174 .idVendor = 0x046d,
2175 .idProduct = 0x08c7,
2176 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2177 .bInterfaceSubClass = 1,
2178 .bInterfaceProtocol = 0 },
2179 /* Chicony CNF7129 (Asus EEE 100HE) */
2180 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2181 | USB_DEVICE_ID_MATCH_INT_INFO,
2182 .idVendor = 0x04f2,
2183 .idProduct = 0xb071,
2184 .bInterfaceClass = USB_CLASS_VIDEO,
2185 .bInterfaceSubClass = 1,
2186 .bInterfaceProtocol = 0,
2187 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE },
2188 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2189 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2190 | USB_DEVICE_ID_MATCH_INT_INFO,
2191 .idVendor = 0x058f,
2192 .idProduct = 0x3820,
2193 .bInterfaceClass = USB_CLASS_VIDEO,
2194 .bInterfaceSubClass = 1,
2195 .bInterfaceProtocol = 0,
2196 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2197 /* Dell XPS m1530 */
2198 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2199 | USB_DEVICE_ID_MATCH_INT_INFO,
2200 .idVendor = 0x05a9,
2201 .idProduct = 0x2640,
2202 .bInterfaceClass = USB_CLASS_VIDEO,
2203 .bInterfaceSubClass = 1,
2204 .bInterfaceProtocol = 0,
2205 .driver_info = UVC_QUIRK_PROBE_DEF },
2206 /* Dell SP2008WFP Monitor */
2207 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2208 | USB_DEVICE_ID_MATCH_INT_INFO,
2209 .idVendor = 0x05a9,
2210 .idProduct = 0x2641,
2211 .bInterfaceClass = USB_CLASS_VIDEO,
2212 .bInterfaceSubClass = 1,
2213 .bInterfaceProtocol = 0,
2214 .driver_info = UVC_QUIRK_PROBE_DEF },
2215 /* Dell Alienware X51 */
2216 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2217 | USB_DEVICE_ID_MATCH_INT_INFO,
2218 .idVendor = 0x05a9,
2219 .idProduct = 0x2643,
2220 .bInterfaceClass = USB_CLASS_VIDEO,
2221 .bInterfaceSubClass = 1,
2222 .bInterfaceProtocol = 0,
2223 .driver_info = UVC_QUIRK_PROBE_DEF },
2224 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2225 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2226 | USB_DEVICE_ID_MATCH_INT_INFO,
2227 .idVendor = 0x05a9,
2228 .idProduct = 0x264a,
2229 .bInterfaceClass = USB_CLASS_VIDEO,
2230 .bInterfaceSubClass = 1,
2231 .bInterfaceProtocol = 0,
2232 .driver_info = UVC_QUIRK_PROBE_DEF },
2233 /* Apple Built-In iSight */
2234 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2235 | USB_DEVICE_ID_MATCH_INT_INFO,
2236 .idVendor = 0x05ac,
2237 .idProduct = 0x8501,
2238 .bInterfaceClass = USB_CLASS_VIDEO,
2239 .bInterfaceSubClass = 1,
2240 .bInterfaceProtocol = 0,
2241 .driver_info = UVC_QUIRK_PROBE_MINMAX
2242 | UVC_QUIRK_BUILTIN_ISIGHT },
2243 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2244 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2245 | USB_DEVICE_ID_MATCH_INT_INFO,
2246 .idVendor = 0x05c8,
2247 .idProduct = 0x0403,
2248 .bInterfaceClass = USB_CLASS_VIDEO,
2249 .bInterfaceSubClass = 1,
2250 .bInterfaceProtocol = 0,
2251 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2252 /* Genesys Logic USB 2.0 PC Camera */
2253 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2254 | USB_DEVICE_ID_MATCH_INT_INFO,
2255 .idVendor = 0x05e3,
2256 .idProduct = 0x0505,
2257 .bInterfaceClass = USB_CLASS_VIDEO,
2258 .bInterfaceSubClass = 1,
2259 .bInterfaceProtocol = 0,
2260 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2261 /* Hercules Classic Silver */
2262 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2263 | USB_DEVICE_ID_MATCH_INT_INFO,
2264 .idVendor = 0x06f8,
2265 .idProduct = 0x300c,
2266 .bInterfaceClass = USB_CLASS_VIDEO,
2267 .bInterfaceSubClass = 1,
2268 .bInterfaceProtocol = 0,
2269 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2270 /* ViMicro Vega */
2271 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2272 | USB_DEVICE_ID_MATCH_INT_INFO,
2273 .idVendor = 0x0ac8,
2274 .idProduct = 0x332d,
2275 .bInterfaceClass = USB_CLASS_VIDEO,
2276 .bInterfaceSubClass = 1,
2277 .bInterfaceProtocol = 0,
2278 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2279 /* ViMicro - Minoru3D */
2280 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2281 | USB_DEVICE_ID_MATCH_INT_INFO,
2282 .idVendor = 0x0ac8,
2283 .idProduct = 0x3410,
2284 .bInterfaceClass = USB_CLASS_VIDEO,
2285 .bInterfaceSubClass = 1,
2286 .bInterfaceProtocol = 0,
2287 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2288 /* ViMicro Venus - Minoru3D */
2289 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2290 | USB_DEVICE_ID_MATCH_INT_INFO,
2291 .idVendor = 0x0ac8,
2292 .idProduct = 0x3420,
2293 .bInterfaceClass = USB_CLASS_VIDEO,
2294 .bInterfaceSubClass = 1,
2295 .bInterfaceProtocol = 0,
2296 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2297 /* Ophir Optronics - SPCAM 620U */
2298 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2299 | USB_DEVICE_ID_MATCH_INT_INFO,
2300 .idVendor = 0x0bd3,
2301 .idProduct = 0x0555,
2302 .bInterfaceClass = USB_CLASS_VIDEO,
2303 .bInterfaceSubClass = 1,
2304 .bInterfaceProtocol = 0,
2305 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2306 /* MT6227 */
2307 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2308 | USB_DEVICE_ID_MATCH_INT_INFO,
2309 .idVendor = 0x0e8d,
2310 .idProduct = 0x0004,
2311 .bInterfaceClass = USB_CLASS_VIDEO,
2312 .bInterfaceSubClass = 1,
2313 .bInterfaceProtocol = 0,
2314 .driver_info = UVC_QUIRK_PROBE_MINMAX
2315 | UVC_QUIRK_PROBE_DEF },
2316 /* IMC Networks (Medion Akoya) */
2317 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2318 | USB_DEVICE_ID_MATCH_INT_INFO,
2319 .idVendor = 0x13d3,
2320 .idProduct = 0x5103,
2321 .bInterfaceClass = USB_CLASS_VIDEO,
2322 .bInterfaceSubClass = 1,
2323 .bInterfaceProtocol = 0,
2324 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2325 /* JMicron USB2.0 XGA WebCam */
2326 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2327 | USB_DEVICE_ID_MATCH_INT_INFO,
2328 .idVendor = 0x152d,
2329 .idProduct = 0x0310,
2330 .bInterfaceClass = USB_CLASS_VIDEO,
2331 .bInterfaceSubClass = 1,
2332 .bInterfaceProtocol = 0,
2333 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2334 /* Syntek (HP Spartan) */
2335 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2336 | USB_DEVICE_ID_MATCH_INT_INFO,
2337 .idVendor = 0x174f,
2338 .idProduct = 0x5212,
2339 .bInterfaceClass = USB_CLASS_VIDEO,
2340 .bInterfaceSubClass = 1,
2341 .bInterfaceProtocol = 0,
2342 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2343 /* Syntek (Samsung Q310) */
2344 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2345 | USB_DEVICE_ID_MATCH_INT_INFO,
2346 .idVendor = 0x174f,
2347 .idProduct = 0x5931,
2348 .bInterfaceClass = USB_CLASS_VIDEO,
2349 .bInterfaceSubClass = 1,
2350 .bInterfaceProtocol = 0,
2351 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2352 /* Syntek (Packard Bell EasyNote MX52 */
2353 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2354 | USB_DEVICE_ID_MATCH_INT_INFO,
2355 .idVendor = 0x174f,
2356 .idProduct = 0x8a12,
2357 .bInterfaceClass = USB_CLASS_VIDEO,
2358 .bInterfaceSubClass = 1,
2359 .bInterfaceProtocol = 0,
2360 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2361 /* Syntek (Asus F9SG) */
2362 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2363 | USB_DEVICE_ID_MATCH_INT_INFO,
2364 .idVendor = 0x174f,
2365 .idProduct = 0x8a31,
2366 .bInterfaceClass = USB_CLASS_VIDEO,
2367 .bInterfaceSubClass = 1,
2368 .bInterfaceProtocol = 0,
2369 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2370 /* Syntek (Asus U3S) */
2371 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2372 | USB_DEVICE_ID_MATCH_INT_INFO,
2373 .idVendor = 0x174f,
2374 .idProduct = 0x8a33,
2375 .bInterfaceClass = USB_CLASS_VIDEO,
2376 .bInterfaceSubClass = 1,
2377 .bInterfaceProtocol = 0,
2378 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2379 /* Syntek (JAOtech Smart Terminal) */
2380 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2381 | USB_DEVICE_ID_MATCH_INT_INFO,
2382 .idVendor = 0x174f,
2383 .idProduct = 0x8a34,
2384 .bInterfaceClass = USB_CLASS_VIDEO,
2385 .bInterfaceSubClass = 1,
2386 .bInterfaceProtocol = 0,
2387 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2388 /* Miricle 307K */
2389 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2390 | USB_DEVICE_ID_MATCH_INT_INFO,
2391 .idVendor = 0x17dc,
2392 .idProduct = 0x0202,
2393 .bInterfaceClass = USB_CLASS_VIDEO,
2394 .bInterfaceSubClass = 1,
2395 .bInterfaceProtocol = 0,
2396 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2397 /* Lenovo Thinkpad SL400/SL500 */
2398 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2399 | USB_DEVICE_ID_MATCH_INT_INFO,
2400 .idVendor = 0x17ef,
2401 .idProduct = 0x480b,
2402 .bInterfaceClass = USB_CLASS_VIDEO,
2403 .bInterfaceSubClass = 1,
2404 .bInterfaceProtocol = 0,
2405 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2406 /* Aveo Technology USB 2.0 Camera */
2407 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2408 | USB_DEVICE_ID_MATCH_INT_INFO,
2409 .idVendor = 0x1871,
2410 .idProduct = 0x0306,
2411 .bInterfaceClass = USB_CLASS_VIDEO,
2412 .bInterfaceSubClass = 1,
2413 .bInterfaceProtocol = 0,
2414 .driver_info = UVC_QUIRK_PROBE_MINMAX
2415 | UVC_QUIRK_PROBE_EXTRAFIELDS },
2416 /* Ecamm Pico iMage */
2417 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2418 | USB_DEVICE_ID_MATCH_INT_INFO,
2419 .idVendor = 0x18cd,
2420 .idProduct = 0xcafe,
2421 .bInterfaceClass = USB_CLASS_VIDEO,
2422 .bInterfaceSubClass = 1,
2423 .bInterfaceProtocol = 0,
2424 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
2425 /* Manta MM-353 Plako */
2426 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2427 | USB_DEVICE_ID_MATCH_INT_INFO,
2428 .idVendor = 0x18ec,
2429 .idProduct = 0x3188,
2430 .bInterfaceClass = USB_CLASS_VIDEO,
2431 .bInterfaceSubClass = 1,
2432 .bInterfaceProtocol = 0,
2433 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2434 /* FSC WebCam V30S */
2435 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2436 | USB_DEVICE_ID_MATCH_INT_INFO,
2437 .idVendor = 0x18ec,
2438 .idProduct = 0x3288,
2439 .bInterfaceClass = USB_CLASS_VIDEO,
2440 .bInterfaceSubClass = 1,
2441 .bInterfaceProtocol = 0,
2442 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2443 /* Arkmicro unbranded */
2444 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2445 | USB_DEVICE_ID_MATCH_INT_INFO,
2446 .idVendor = 0x18ec,
2447 .idProduct = 0x3290,
2448 .bInterfaceClass = USB_CLASS_VIDEO,
2449 .bInterfaceSubClass = 1,
2450 .bInterfaceProtocol = 0,
2451 .driver_info = UVC_QUIRK_PROBE_DEF },
2452 /* The Imaging Source USB CCD cameras */
2453 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2454 | USB_DEVICE_ID_MATCH_INT_INFO,
2455 .idVendor = 0x199e,
2456 .idProduct = 0x8102,
2457 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2458 .bInterfaceSubClass = 1,
2459 .bInterfaceProtocol = 0 },
2460 /* Bodelin ProScopeHR */
2461 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2462 | USB_DEVICE_ID_MATCH_DEV_HI
2463 | USB_DEVICE_ID_MATCH_INT_INFO,
2464 .idVendor = 0x19ab,
2465 .idProduct = 0x1000,
2466 .bcdDevice_hi = 0x0126,
2467 .bInterfaceClass = USB_CLASS_VIDEO,
2468 .bInterfaceSubClass = 1,
2469 .bInterfaceProtocol = 0,
2470 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
2471 /* MSI StarCam 370i */
2472 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2473 | USB_DEVICE_ID_MATCH_INT_INFO,
2474 .idVendor = 0x1b3b,
2475 .idProduct = 0x2951,
2476 .bInterfaceClass = USB_CLASS_VIDEO,
2477 .bInterfaceSubClass = 1,
2478 .bInterfaceProtocol = 0,
2479 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2480 /* SiGma Micro USB Web Camera */
2481 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2482 | USB_DEVICE_ID_MATCH_INT_INFO,
2483 .idVendor = 0x1c4f,
2484 .idProduct = 0x3000,
2485 .bInterfaceClass = USB_CLASS_VIDEO,
2486 .bInterfaceSubClass = 1,
2487 .bInterfaceProtocol = 0,
2488 .driver_info = UVC_QUIRK_PROBE_MINMAX
2489 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
2490 /* Generic USB Video Class */
2491 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
2492 {}
2493 };
2494
2495 MODULE_DEVICE_TABLE(usb, uvc_ids);
2496
2497 struct uvc_driver uvc_driver = {
2498 .driver = {
2499 .name = "uvcvideo",
2500 .probe = uvc_probe,
2501 .disconnect = uvc_disconnect,
2502 .suspend = uvc_suspend,
2503 .resume = uvc_resume,
2504 .reset_resume = uvc_reset_resume,
2505 .id_table = uvc_ids,
2506 .supports_autosuspend = 1,
2507 },
2508 };
2509
2510 static int __init uvc_init(void)
2511 {
2512 int ret;
2513
2514 uvc_debugfs_init();
2515
2516 ret = usb_register(&uvc_driver.driver);
2517 if (ret < 0) {
2518 uvc_debugfs_cleanup();
2519 return ret;
2520 }
2521
2522 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2523 return 0;
2524 }
2525
2526 static void __exit uvc_cleanup(void)
2527 {
2528 usb_deregister(&uvc_driver.driver);
2529 uvc_debugfs_cleanup();
2530 }
2531
2532 module_init(uvc_init);
2533 module_exit(uvc_cleanup);
2534
2535 MODULE_AUTHOR(DRIVER_AUTHOR);
2536 MODULE_DESCRIPTION(DRIVER_DESC);
2537 MODULE_LICENSE("GPL");
2538 MODULE_VERSION(DRIVER_VERSION);
2539
Linux with added FPC-III support