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V4L/DVB (10104): uvcvideo: Add support for video output devices
[net-next-2.6.git] / drivers / media / video / uvc / uvc_driver.c
CommitLineData
c0efd232
LP		 1/*
2 * uvc_driver.c -- USB Video Class driver
3 *
4 * Copyright (C) 2005-2008
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/*
ff924203
LP		 15 * This driver aims to support video input and ouput devices compliant with the
16 * 'USB Video Class' specification.
c0efd232
LP		 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/version.h>
28#include <linux/list.h>
29#include <linux/module.h>
30#include <linux/usb.h>
31#include <linux/videodev2.h>
32#include <linux/vmalloc.h>
33#include <linux/wait.h>
34#include <asm/atomic.h>
9bc6218d 35#include <asm/unaligned.h>
c0efd232
LP		 36
37#include <media/v4l2-common.h>
38
39#include "uvcvideo.h"
40
41#define DRIVER_AUTHOR "Laurent Pinchart <laurent.pinchart@skynet.be>"
42#define DRIVER_DESC "USB Video Class driver"
43#ifndef DRIVER_VERSION
44#define DRIVER_VERSION "v0.1.0"
45#endif
46
0fbd8ee6 47unsigned int uvc_no_drop_param;
c0efd232
LP		 48static unsigned int uvc_quirks_param;
49unsigned int uvc_trace_param;
50
51/* ------------------------------------------------------------------------
52 * Control, formats, ...
53 */
54
55static struct uvc_format_desc uvc_fmts[] = {
56 {
57 .name = "YUV 4:2:2 (YUYV)",
58 .guid = UVC_GUID_FORMAT_YUY2,
59 .fcc = V4L2_PIX_FMT_YUYV,
60 },
61 {
62 .name = "YUV 4:2:0 (NV12)",
63 .guid = UVC_GUID_FORMAT_NV12,
64 .fcc = V4L2_PIX_FMT_NV12,
65 },
66 {
67 .name = "MJPEG",
68 .guid = UVC_GUID_FORMAT_MJPEG,
69 .fcc = V4L2_PIX_FMT_MJPEG,
70 },
71 {
72 .name = "YVU 4:2:0 (YV12)",
73 .guid = UVC_GUID_FORMAT_YV12,
74 .fcc = V4L2_PIX_FMT_YVU420,
75 },
76 {
77 .name = "YUV 4:2:0 (I420)",
78 .guid = UVC_GUID_FORMAT_I420,
79 .fcc = V4L2_PIX_FMT_YUV420,
80 },
81 {
82 .name = "YUV 4:2:2 (UYVY)",
83 .guid = UVC_GUID_FORMAT_UYVY,
84 .fcc = V4L2_PIX_FMT_UYVY,
85 },
86 {
87 .name = "Greyscale",
88 .guid = UVC_GUID_FORMAT_Y800,
89 .fcc = V4L2_PIX_FMT_GREY,
90 },
91 {
92 .name = "RGB Bayer",
93 .guid = UVC_GUID_FORMAT_BY8,
94 .fcc = V4L2_PIX_FMT_SBGGR8,
95 },
96};
97
98/* ------------------------------------------------------------------------
99 * Utility functions
100 */
101
102struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
103 __u8 epaddr)
104{
105 struct usb_host_endpoint *ep;
106 unsigned int i;
107
108 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
109 ep = &alts->endpoint[i];
110 if (ep->desc.bEndpointAddress == epaddr)
111 return ep;
112 }
113
114 return NULL;
115}
116
117static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
118{
119 unsigned int len = ARRAY_SIZE(uvc_fmts);
120 unsigned int i;
121
122 for (i = 0; i < len; ++i) {
123 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
124 return &uvc_fmts[i];
125 }
126
127 return NULL;
128}
129
130static __u32 uvc_colorspace(const __u8 primaries)
131{
132 static const __u8 colorprimaries[] = {
133 0,
134 V4L2_COLORSPACE_SRGB,
135 V4L2_COLORSPACE_470_SYSTEM_M,
136 V4L2_COLORSPACE_470_SYSTEM_BG,
137 V4L2_COLORSPACE_SMPTE170M,
138 V4L2_COLORSPACE_SMPTE240M,
139 };
140
141 if (primaries < ARRAY_SIZE(colorprimaries))
142 return colorprimaries[primaries];
143
144 return 0;
145}
146
147/* Simplify a fraction using a simple continued fraction decomposition. The
148 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
149 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
150 * arbitrary parameters to remove non-significative terms from the simple
151 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
152 * respectively seems to give nice results.
153 */
154void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
155 unsigned int n_terms, unsigned int threshold)
156{
157 uint32_t *an;
158 uint32_t x, y, r;
159 unsigned int i, n;
160
161 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
162 if (an == NULL)
163 return;
164
165 /* Convert the fraction to a simple continued fraction. See
166 * http://mathforum.org/dr.math/faq/faq.fractions.html
167 * Stop if the current term is bigger than or equal to the given
168 * threshold.
169 */
170 x = *numerator;
171 y = *denominator;
172
173 for (n = 0; n < n_terms && y != 0; ++n) {
174 an[n] = x / y;
175 if (an[n] >= threshold) {
176 if (n < 2)
177 n++;
178 break;
179 }
180
181 r = x - an[n] * y;
182 x = y;
183 y = r;
184 }
185
186 /* Expand the simple continued fraction back to an integer fraction. */
187 x = 0;
188 y = 1;
189
190 for (i = n; i > 0; --i) {
191 r = y;
192 y = an[i-1] * y + x;
193 x = r;
194 }
195
196 *numerator = y;
197 *denominator = x;
198 kfree(an);
199}
200
201/* Convert a fraction to a frame interval in 100ns multiples. The idea here is
202 * to compute numerator / denominator * 10000000 using 32 bit fixed point
203 * arithmetic only.
204 */
205uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
206{
207 uint32_t multiplier;
208
209 /* Saturate the result if the operation would overflow. */
210 if (denominator == 0 ||
211 numerator/denominator >= ((uint32_t)-1)/10000000)
212 return (uint32_t)-1;
213
214 /* Divide both the denominator and the multiplier by two until
215 * numerator * multiplier doesn't overflow. If anyone knows a better
216 * algorithm please let me know.
217 */
218 multiplier = 10000000;
219 while (numerator > ((uint32_t)-1)/multiplier) {
220 multiplier /= 2;
221 denominator /= 2;
222 }
223
224 return denominator ? numerator * multiplier / denominator : 0;
225}
226
227/* ------------------------------------------------------------------------
228 * Terminal and unit management
229 */
230
231static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
232{
233 struct uvc_entity *entity;
234
235 list_for_each_entry(entity, &dev->entities, list) {
236 if (entity->id == id)
237 return entity;
238 }
239
240 return NULL;
241}
242
243static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
244 int id, struct uvc_entity *entity)
245{
246 unsigned int i;
247
248 if (entity == NULL)
249 entity = list_entry(&dev->entities, struct uvc_entity, list);
250
251 list_for_each_entry_continue(entity, &dev->entities, list) {
252 switch (UVC_ENTITY_TYPE(entity)) {
253 case TT_STREAMING:
254 if (entity->output.bSourceID == id)
255 return entity;
256 break;
257
258 case VC_PROCESSING_UNIT:
259 if (entity->processing.bSourceID == id)
260 return entity;
261 break;
262
263 case VC_SELECTOR_UNIT:
264 for (i = 0; i < entity->selector.bNrInPins; ++i)
265 if (entity->selector.baSourceID[i] == id)
266 return entity;
267 break;
268
269 case VC_EXTENSION_UNIT:
270 for (i = 0; i < entity->extension.bNrInPins; ++i)
271 if (entity->extension.baSourceID[i] == id)
272 return entity;
273 break;
274 }
275 }
276
277 return NULL;
278}
279
280/* ------------------------------------------------------------------------
281 * Descriptors handling
282 */
283
284static int uvc_parse_format(struct uvc_device *dev,
285 struct uvc_streaming *streaming, struct uvc_format *format,
286 __u32 **intervals, unsigned char *buffer, int buflen)
287{
288 struct usb_interface *intf = streaming->intf;
289 struct usb_host_interface *alts = intf->cur_altsetting;
290 struct uvc_format_desc *fmtdesc;
291 struct uvc_frame *frame;
292 const unsigned char *start = buffer;
c9535db3 293 unsigned char *_buffer;
c0efd232
LP		 294 unsigned int interval;
295 unsigned int i, n;
c9535db3 296 int _buflen;
c0efd232
LP		 297 __u8 ftype;
298
299 format->type = buffer[2];
300 format->index = buffer[3];
301
302 switch (buffer[2]) {
303 case VS_FORMAT_UNCOMPRESSED:
304 case VS_FORMAT_FRAME_BASED:
233548a2
LP		 305 n = buffer[2] == VS_FORMAT_UNCOMPRESSED ? 27 : 28;
306 if (buflen < n) {
c0efd232
LP		 307 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
308 "interface %d FORMAT error\n",
309 dev->udev->devnum,
310 alts->desc.bInterfaceNumber);
311 return -EINVAL;
312 }
313
314 /* Find the format descriptor from its GUID. */
315 fmtdesc = uvc_format_by_guid(&buffer[5]);
316
317 if (fmtdesc != NULL) {
318 strncpy(format->name, fmtdesc->name,
319 sizeof format->name);
320 format->fcc = fmtdesc->fcc;
321 } else {
322 uvc_printk(KERN_INFO, "Unknown video format "
323 UVC_GUID_FORMAT "\n",
324 UVC_GUID_ARGS(&buffer[5]));
325 snprintf(format->name, sizeof format->name,
326 UVC_GUID_FORMAT, UVC_GUID_ARGS(&buffer[5]));
327 format->fcc = 0;
328 }
329
330 format->bpp = buffer[21];
331 if (buffer[2] == VS_FORMAT_UNCOMPRESSED) {
332 ftype = VS_FRAME_UNCOMPRESSED;
333 } else {
334 ftype = VS_FRAME_FRAME_BASED;
335 if (buffer[27])
336 format->flags = UVC_FMT_FLAG_COMPRESSED;
337 }
338 break;
339
340 case VS_FORMAT_MJPEG:
341 if (buflen < 11) {
342 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
343 "interface %d FORMAT error\n",
344 dev->udev->devnum,
345 alts->desc.bInterfaceNumber);
346 return -EINVAL;
347 }
348
349 strncpy(format->name, "MJPEG", sizeof format->name);
350 format->fcc = V4L2_PIX_FMT_MJPEG;
351 format->flags = UVC_FMT_FLAG_COMPRESSED;
352 format->bpp = 0;
353 ftype = VS_FRAME_MJPEG;
354 break;
355
356 case VS_FORMAT_DV:
357 if (buflen < 9) {
358 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
359 "interface %d FORMAT error\n",
360 dev->udev->devnum,
361 alts->desc.bInterfaceNumber);
362 return -EINVAL;
363 }
364
365 switch (buffer[8] & 0x7f) {
366 case 0:
367 strncpy(format->name, "SD-DV", sizeof format->name);
368 break;
369 case 1:
370 strncpy(format->name, "SDL-DV", sizeof format->name);
371 break;
372 case 2:
373 strncpy(format->name, "HD-DV", sizeof format->name);
374 break;
375 default:
376 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
377 "interface %d: unknown DV format %u\n",
378 dev->udev->devnum,
379 alts->desc.bInterfaceNumber, buffer[8]);
380 return -EINVAL;
381 }
382
383 strncat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
384 sizeof format->name);
385
386 format->fcc = V4L2_PIX_FMT_DV;
387 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
388 format->bpp = 0;
389 ftype = 0;
390
391 /* Create a dummy frame descriptor. */
392 frame = &format->frame[0];
393 memset(&format->frame[0], 0, sizeof format->frame[0]);
394 frame->bFrameIntervalType = 1;
395 frame->dwDefaultFrameInterval = 1;
396 frame->dwFrameInterval = *intervals;
397 *(*intervals)++ = 1;
398 format->nframes = 1;
399 break;
400
401 case VS_FORMAT_MPEG2TS:
402 case VS_FORMAT_STREAM_BASED:
403 /* Not supported yet. */
404 default:
405 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
406 "interface %d unsupported format %u\n",
407 dev->udev->devnum, alts->desc.bInterfaceNumber,
408 buffer[2]);
409 return -EINVAL;
410 }
411
412 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
413
414 buflen -= buffer[0];
415 buffer += buffer[0];
416
c9535db3
LP		 417 /* Count the number of frame descriptors to test the bFrameIndex
418 * field when parsing the descriptors. We can't rely on the
419 * bNumFrameDescriptors field as some cameras don't initialize it
420 * properly.
421 */
422 for (_buflen = buflen, _buffer = buffer;
423 _buflen > 2 && _buffer[2] == ftype;
424 _buflen -= _buffer[0], _buffer += _buffer[0])
425 format->nframes++;
426
c0efd232
LP		 427 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
428 * based formats have frame descriptors.
429 */
430 while (buflen > 2 && buffer[2] == ftype) {
c0efd232
LP		 431 if (ftype != VS_FRAME_FRAME_BASED)
432 n = buflen > 25 ? buffer[25] : 0;
433 else
434 n = buflen > 21 ? buffer[21] : 0;
435
436 n = n ? n : 3;
437
438 if (buflen < 26 + 4*n) {
439 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
440 "interface %d FRAME error\n", dev->udev->devnum,
441 alts->desc.bInterfaceNumber);
442 return -EINVAL;
443 }
444
c9535db3
LP		 445 if (buffer[3] - 1 >= format->nframes) {
446 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
447 "interface %d frame index %u out of range\n",
448 dev->udev->devnum, alts->desc.bInterfaceNumber,
449 buffer[3]);
450 return -EINVAL;
451 }
452
453 frame = &format->frame[buffer[3] - 1];
454
c0efd232
LP		 455 frame->bFrameIndex = buffer[3];
456 frame->bmCapabilities = buffer[4];
9bc6218d
MH		 457 frame->wWidth = get_unaligned_le16(&buffer[5]);
458 frame->wHeight = get_unaligned_le16(&buffer[7]);
459 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
460 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
c0efd232
LP		 461 if (ftype != VS_FRAME_FRAME_BASED) {
462 frame->dwMaxVideoFrameBufferSize =
9bc6218d 463 get_unaligned_le32(&buffer[17]);
c0efd232 464 frame->dwDefaultFrameInterval =
9bc6218d 465 get_unaligned_le32(&buffer[21]);
c0efd232
LP		 466 frame->bFrameIntervalType = buffer[25];
467 } else {
468 frame->dwMaxVideoFrameBufferSize = 0;
469 frame->dwDefaultFrameInterval =
9bc6218d 470 get_unaligned_le32(&buffer[17]);
c0efd232
LP		 471 frame->bFrameIntervalType = buffer[21];
472 }
473 frame->dwFrameInterval = *intervals;
474
475 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
476 * completely. Observed behaviours range from setting the
477 * value to 1.1x the actual frame size of hardwiring the
478 * 16 low bits to 0. This results in a higher than necessary
479 * memory usage as well as a wrong image size information. For
480 * uncompressed formats this can be fixed by computing the
481 * value from the frame size.
482 */
483 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
484 frame->dwMaxVideoFrameBufferSize = format->bpp
485 * frame->wWidth * frame->wHeight / 8;
486
487 /* Some bogus devices report dwMinFrameInterval equal to
488 * dwMaxFrameInterval and have dwFrameIntervalStep set to
489 * zero. Setting all null intervals to 1 fixes the problem and
490 * some other divisions by zero which could happen.
491 */
492 for (i = 0; i < n; ++i) {
9bc6218d 493 interval = get_unaligned_le32(&buffer[26+4*i]);
c0efd232
LP		 494 *(*intervals)++ = interval ? interval : 1;
495 }
496
497 /* Make sure that the default frame interval stays between
498 * the boundaries.
499 */
500 n -= frame->bFrameIntervalType ? 1 : 2;
501 frame->dwDefaultFrameInterval =
502 min(frame->dwFrameInterval[n],
503 max(frame->dwFrameInterval[0],
504 frame->dwDefaultFrameInterval));
505
506 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
507 frame->wWidth, frame->wHeight,
508 10000000/frame->dwDefaultFrameInterval,
509 (100000000/frame->dwDefaultFrameInterval)%10);
510
c0efd232
LP		 511 buflen -= buffer[0];
512 buffer += buffer[0];
513 }
514
515 if (buflen > 2 && buffer[2] == VS_STILL_IMAGE_FRAME) {
516 buflen -= buffer[0];
517 buffer += buffer[0];
518 }
519
520 if (buflen > 2 && buffer[2] == VS_COLORFORMAT) {
521 if (buflen < 6) {
522 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
523 "interface %d COLORFORMAT error\n",
524 dev->udev->devnum,
525 alts->desc.bInterfaceNumber);
526 return -EINVAL;
527 }
528
529 format->colorspace = uvc_colorspace(buffer[3]);
530
531 buflen -= buffer[0];
532 buffer += buffer[0];
533 }
534
535 return buffer - start;
536}
537
538static int uvc_parse_streaming(struct uvc_device *dev,
539 struct usb_interface *intf)
540{
541 struct uvc_streaming *streaming = NULL;
542 struct uvc_format *format;
543 struct uvc_frame *frame;
544 struct usb_host_interface *alts = &intf->altsetting[0];
545 unsigned char *_buffer, *buffer = alts->extra;
546 int _buflen, buflen = alts->extralen;
547 unsigned int nformats = 0, nframes = 0, nintervals = 0;
548 unsigned int size, i, n, p;
549 __u32 *interval;
550 __u16 psize;
551 int ret = -EINVAL;
552
553 if (intf->cur_altsetting->desc.bInterfaceSubClass
554 != SC_VIDEOSTREAMING) {
555 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
556 "video streaming interface\n", dev->udev->devnum,
557 intf->altsetting[0].desc.bInterfaceNumber);
558 return -EINVAL;
559 }
560
561 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
562 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
563 "claimed\n", dev->udev->devnum,
564 intf->altsetting[0].desc.bInterfaceNumber);
565 return -EINVAL;
566 }
567
568 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
569 if (streaming == NULL) {
570 usb_driver_release_interface(&uvc_driver.driver, intf);
571 return -EINVAL;
572 }
573
574 mutex_init(&streaming->mutex);
575 streaming->intf = usb_get_intf(intf);
576 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
577
578 /* The Pico iMage webcam has its class-specific interface descriptors
579 * after the endpoint descriptors.
580 */
581 if (buflen == 0) {
582 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
583 struct usb_host_endpoint *ep = &alts->endpoint[i];
584
585 if (ep->extralen == 0)
586 continue;
587
588 if (ep->extralen > 2 &&
589 ep->extra[1] == USB_DT_CS_INTERFACE) {
590 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
591 "from endpoint %u.\n", i);
592 buffer = alts->endpoint[i].extra;
593 buflen = alts->endpoint[i].extralen;
594 break;
595 }
596 }
597 }
598
599 /* Skip the standard interface descriptors. */
600 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
601 buflen -= buffer[0];
602 buffer += buffer[0];
603 }
604
605 if (buflen <= 2) {
606 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
607 "interface descriptors found.\n");
608 goto error;
609 }
610
611 /* Parse the header descriptor. */
ff924203
LP		 612 switch (buffer[2]) {
613 case VS_OUTPUT_HEADER:
614 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
615 size = 9;
616 break;
617
618 case VS_INPUT_HEADER:
619 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
620 size = 13;
621 break;
622
623 default:
c0efd232 624 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
ff924203
LP		 625 "%d HEADER descriptor not found.\n", dev->udev->devnum,
626 alts->desc.bInterfaceNumber);
c0efd232 627 goto error;
ff924203 628 }
c0efd232 629
ff924203
LP		 630 p = buflen >= 4 ? buffer[3] : 0;
631 n = buflen >= size ? buffer[size-1] : 0;
632
633 if (buflen < size + p*n) {
634 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
635 "interface %d HEADER descriptor is invalid.\n",
636 dev->udev->devnum, alts->desc.bInterfaceNumber);
637 goto error;
638 }
c0efd232 639
ff924203
LP		 640 streaming->header.bNumFormats = p;
641 streaming->header.bEndpointAddress = buffer[6];
642 if (buffer[2] == VS_INPUT_HEADER) {
c0efd232
LP		 643 streaming->header.bmInfo = buffer[7];
644 streaming->header.bTerminalLink = buffer[8];
645 streaming->header.bStillCaptureMethod = buffer[9];
646 streaming->header.bTriggerSupport = buffer[10];
647 streaming->header.bTriggerUsage = buffer[11];
c0efd232 648 } else {
ff924203
LP		 649 streaming->header.bTerminalLink = buffer[7];
650 }
651 streaming->header.bControlSize = n;
652
653 streaming->header.bmaControls = kmalloc(p*n, GFP_KERNEL);
654 if (streaming->header.bmaControls == NULL) {
655 ret = -ENOMEM;
c0efd232
LP		 656 goto error;
657 }
658
ff924203
LP		 659 memcpy(streaming->header.bmaControls, &buffer[size], p*n);
660
c0efd232
LP		 661 buflen -= buffer[0];
662 buffer += buffer[0];
663
664 _buffer = buffer;
665 _buflen = buflen;
666
667 /* Count the format and frame descriptors. */
668 while (_buflen > 2) {
669 switch (_buffer[2]) {
670 case VS_FORMAT_UNCOMPRESSED:
671 case VS_FORMAT_MJPEG:
672 case VS_FORMAT_FRAME_BASED:
673 nformats++;
674 break;
675
676 case VS_FORMAT_DV:
677 /* DV format has no frame descriptor. We will create a
678 * dummy frame descriptor with a dummy frame interval.
679 */
680 nformats++;
681 nframes++;
682 nintervals++;
683 break;
684
685 case VS_FORMAT_MPEG2TS:
686 case VS_FORMAT_STREAM_BASED:
687 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
688 "interface %d FORMAT %u is not supported.\n",
689 dev->udev->devnum,
690 alts->desc.bInterfaceNumber, _buffer[2]);
691 break;
692
693 case VS_FRAME_UNCOMPRESSED:
694 case VS_FRAME_MJPEG:
695 nframes++;
696 if (_buflen > 25)
697 nintervals += _buffer[25] ? _buffer[25] : 3;
698 break;
699
700 case VS_FRAME_FRAME_BASED:
701 nframes++;
702 if (_buflen > 21)
703 nintervals += _buffer[21] ? _buffer[21] : 3;
704 break;
705 }
706
707 _buflen -= _buffer[0];
708 _buffer += _buffer[0];
709 }
710
711 if (nformats == 0) {
712 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
713 "%d has no supported formats defined.\n",
714 dev->udev->devnum, alts->desc.bInterfaceNumber);
715 goto error;
716 }
717
718 size = nformats * sizeof *format + nframes * sizeof *frame
719 + nintervals * sizeof *interval;
720 format = kzalloc(size, GFP_KERNEL);
721 if (format == NULL) {
722 ret = -ENOMEM;
723 goto error;
724 }
725
726 frame = (struct uvc_frame *)&format[nformats];
727 interval = (__u32 *)&frame[nframes];
728
729 streaming->format = format;
730 streaming->nformats = nformats;
731
732 /* Parse the format descriptors. */
733 while (buflen > 2) {
734 switch (buffer[2]) {
735 case VS_FORMAT_UNCOMPRESSED:
736 case VS_FORMAT_MJPEG:
737 case VS_FORMAT_DV:
738 case VS_FORMAT_FRAME_BASED:
739 format->frame = frame;
740 ret = uvc_parse_format(dev, streaming, format,
741 &interval, buffer, buflen);
742 if (ret < 0)
743 goto error;
744
745 frame += format->nframes;
746 format++;
747
748 buflen -= ret;
749 buffer += ret;
750 continue;
751
752 default:
753 break;
754 }
755
756 buflen -= buffer[0];
757 buffer += buffer[0];
758 }
759
760 /* Parse the alternate settings to find the maximum bandwidth. */
761 for (i = 0; i < intf->num_altsetting; ++i) {
762 struct usb_host_endpoint *ep;
763 alts = &intf->altsetting[i];
764 ep = uvc_find_endpoint(alts,
765 streaming->header.bEndpointAddress);
766 if (ep == NULL)
767 continue;
768
769 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
770 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
771 if (psize > streaming->maxpsize)
772 streaming->maxpsize = psize;
773 }
774
775 list_add_tail(&streaming->list, &dev->streaming);
776 return 0;
777
778error:
779 usb_driver_release_interface(&uvc_driver.driver, intf);
780 usb_put_intf(intf);
781 kfree(streaming->format);
782 kfree(streaming->header.bmaControls);
783 kfree(streaming);
784 return ret;
785}
786
787/* Parse vendor-specific extensions. */
788static int uvc_parse_vendor_control(struct uvc_device *dev,
789 const unsigned char *buffer, int buflen)
790{
791 struct usb_device *udev = dev->udev;
792 struct usb_host_interface *alts = dev->intf->cur_altsetting;
793 struct uvc_entity *unit;
794 unsigned int n, p;
795 int handled = 0;
796
797 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
798 case 0x046d: /* Logitech */
799 if (buffer[1] != 0x41 || buffer[2] != 0x01)
800 break;
801
802 /* Logitech implements several vendor specific functions
803 * through vendor specific extension units (LXU).
804 *
805 * The LXU descriptors are similar to XU descriptors
806 * (see "USB Device Video Class for Video Devices", section
807 * 3.7.2.6 "Extension Unit Descriptor") with the following
808 * differences:
809 *
810 * ----------------------------------------------------------
811 * 0 bLength 1 Number
812 * Size of this descriptor, in bytes: 24+p+n*2
813 * ----------------------------------------------------------
814 * 23+p+n bmControlsType N Bitmap
815 * Individual bits in the set are defined:
816 * 0: Absolute
817 * 1: Relative
818 *
819 * This bitset is mapped exactly the same as bmControls.
820 * ----------------------------------------------------------
821 * 23+p+n*2 bReserved 1 Boolean
822 * ----------------------------------------------------------
823 * 24+p+n*2 iExtension 1 Index
824 * Index of a string descriptor that describes this
825 * extension unit.
826 * ----------------------------------------------------------
827 */
828 p = buflen >= 22 ? buffer[21] : 0;
829 n = buflen >= 25 + p ? buffer[22+p] : 0;
830
831 if (buflen < 25 + p + 2*n) {
832 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
833 "interface %d EXTENSION_UNIT error\n",
834 udev->devnum, alts->desc.bInterfaceNumber);
835 break;
836 }
837
838 unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL);
839 if (unit == NULL)
840 return -ENOMEM;
841
842 unit->id = buffer[3];
843 unit->type = VC_EXTENSION_UNIT;
844 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
845 unit->extension.bNumControls = buffer[20];
9bc6218d 846 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
c0efd232
LP		 847 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
848 memcpy(unit->extension.baSourceID, &buffer[22], p);
849 unit->extension.bControlSize = buffer[22+p];
850 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
851 unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit
852 + p + n;
853 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
854
855 if (buffer[24+p+2*n] != 0)
856 usb_string(udev, buffer[24+p+2*n], unit->name,
857 sizeof unit->name);
858 else
859 sprintf(unit->name, "Extension %u", buffer[3]);
860
861 list_add_tail(&unit->list, &dev->entities);
862 handled = 1;
863 break;
864 }
865
866 return handled;
867}
868
869static int uvc_parse_standard_control(struct uvc_device *dev,
870 const unsigned char *buffer, int buflen)
871{
872 struct usb_device *udev = dev->udev;
873 struct uvc_entity *unit, *term;
874 struct usb_interface *intf;
875 struct usb_host_interface *alts = dev->intf->cur_altsetting;
876 unsigned int i, n, p, len;
877 __u16 type;
878
879 switch (buffer[2]) {
880 case VC_HEADER:
881 n = buflen >= 12 ? buffer[11] : 0;
882
883 if (buflen < 12 || buflen < 12 + n) {
884 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
885 "interface %d HEADER error\n", udev->devnum,
886 alts->desc.bInterfaceNumber);
887 return -EINVAL;
888 }
889
9bc6218d
MH		 890 dev->uvc_version = get_unaligned_le16(&buffer[3]);
891 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
c0efd232
LP		 892
893 /* Parse all USB Video Streaming interfaces. */
894 for (i = 0; i < n; ++i) {
895 intf = usb_ifnum_to_if(udev, buffer[12+i]);
896 if (intf == NULL) {
897 uvc_trace(UVC_TRACE_DESCR, "device %d "
898 "interface %d doesn't exists\n",
899 udev->devnum, i);
900 continue;
901 }
902
903 uvc_parse_streaming(dev, intf);
904 }
905 break;
906
907 case VC_INPUT_TERMINAL:
908 if (buflen < 8) {
909 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
910 "interface %d INPUT_TERMINAL error\n",
911 udev->devnum, alts->desc.bInterfaceNumber);
912 return -EINVAL;
913 }
914
915 /* Make sure the terminal type MSB is not null, otherwise it
916 * could be confused with a unit.
917 */
9bc6218d 918 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 919 if ((type & 0xff00) == 0) {
920 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
921 "interface %d INPUT_TERMINAL %d has invalid "
922 "type 0x%04x, skipping\n", udev->devnum,
923 alts->desc.bInterfaceNumber,
924 buffer[3], type);
925 return 0;
926 }
927
928 n = 0;
929 p = 0;
930 len = 8;
931
932 if (type == ITT_CAMERA) {
933 n = buflen >= 15 ? buffer[14] : 0;
934 len = 15;
935
936 } else if (type == ITT_MEDIA_TRANSPORT_INPUT) {
937 n = buflen >= 9 ? buffer[8] : 0;
938 p = buflen >= 10 + n ? buffer[9+n] : 0;
939 len = 10;
940 }
941
942 if (buflen < len + n + p) {
943 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
944 "interface %d INPUT_TERMINAL error\n",
945 udev->devnum, alts->desc.bInterfaceNumber);
946 return -EINVAL;
947 }
948
949 term = kzalloc(sizeof *term + n + p, GFP_KERNEL);
950 if (term == NULL)
951 return -ENOMEM;
952
953 term->id = buffer[3];
954 term->type = type | UVC_TERM_INPUT;
955
956 if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) {
957 term->camera.bControlSize = n;
958 term->camera.bmControls = (__u8 *)term + sizeof *term;
959 term->camera.wObjectiveFocalLengthMin =
9bc6218d 960 get_unaligned_le16(&buffer[8]);
c0efd232 961 term->camera.wObjectiveFocalLengthMax =
9bc6218d 962 get_unaligned_le16(&buffer[10]);
c0efd232 963 term->camera.wOcularFocalLength =
9bc6218d 964 get_unaligned_le16(&buffer[12]);
c0efd232
LP		 965 memcpy(term->camera.bmControls, &buffer[15], n);
966 } else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) {
967 term->media.bControlSize = n;
968 term->media.bmControls = (__u8 *)term + sizeof *term;
969 term->media.bTransportModeSize = p;
970 term->media.bmTransportModes = (__u8 *)term
971 + sizeof *term + n;
972 memcpy(term->media.bmControls, &buffer[9], n);
973 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
974 }
975
976 if (buffer[7] != 0)
977 usb_string(udev, buffer[7], term->name,
978 sizeof term->name);
979 else if (UVC_ENTITY_TYPE(term) == ITT_CAMERA)
980 sprintf(term->name, "Camera %u", buffer[3]);
981 else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT)
982 sprintf(term->name, "Media %u", buffer[3]);
983 else
984 sprintf(term->name, "Input %u", buffer[3]);
985
986 list_add_tail(&term->list, &dev->entities);
987 break;
988
989 case VC_OUTPUT_TERMINAL:
990 if (buflen < 9) {
991 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
992 "interface %d OUTPUT_TERMINAL error\n",
993 udev->devnum, alts->desc.bInterfaceNumber);
994 return -EINVAL;
995 }
996
997 /* Make sure the terminal type MSB is not null, otherwise it
998 * could be confused with a unit.
999 */
9bc6218d 1000 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 1001 if ((type & 0xff00) == 0) {
1002 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1003 "interface %d OUTPUT_TERMINAL %d has invalid "
1004 "type 0x%04x, skipping\n", udev->devnum,
1005 alts->desc.bInterfaceNumber, buffer[3], type);
1006 return 0;
1007 }
1008
1009 term = kzalloc(sizeof *term, GFP_KERNEL);
1010 if (term == NULL)
1011 return -ENOMEM;
1012
1013 term->id = buffer[3];
1014 term->type = type | UVC_TERM_OUTPUT;
1015 term->output.bSourceID = buffer[7];
1016
1017 if (buffer[8] != 0)
1018 usb_string(udev, buffer[8], term->name,
1019 sizeof term->name);
1020 else
1021 sprintf(term->name, "Output %u", buffer[3]);
1022
1023 list_add_tail(&term->list, &dev->entities);
1024 break;
1025
1026 case VC_SELECTOR_UNIT:
1027 p = buflen >= 5 ? buffer[4] : 0;
1028
1029 if (buflen < 5 || buflen < 6 + p) {
1030 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1031 "interface %d SELECTOR_UNIT error\n",
1032 udev->devnum, alts->desc.bInterfaceNumber);
1033 return -EINVAL;
1034 }
1035
1036 unit = kzalloc(sizeof *unit + p, GFP_KERNEL);
1037 if (unit == NULL)
1038 return -ENOMEM;
1039
1040 unit->id = buffer[3];
1041 unit->type = buffer[2];
1042 unit->selector.bNrInPins = buffer[4];
1043 unit->selector.baSourceID = (__u8 *)unit + sizeof *unit;
1044 memcpy(unit->selector.baSourceID, &buffer[5], p);
1045
1046 if (buffer[5+p] != 0)
1047 usb_string(udev, buffer[5+p], unit->name,
1048 sizeof unit->name);
1049 else
1050 sprintf(unit->name, "Selector %u", buffer[3]);
1051
1052 list_add_tail(&unit->list, &dev->entities);
1053 break;
1054
1055 case VC_PROCESSING_UNIT:
1056 n = buflen >= 8 ? buffer[7] : 0;
1057 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1058
1059 if (buflen < p + n) {
1060 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1061 "interface %d PROCESSING_UNIT error\n",
1062 udev->devnum, alts->desc.bInterfaceNumber);
1063 return -EINVAL;
1064 }
1065
1066 unit = kzalloc(sizeof *unit + n, GFP_KERNEL);
1067 if (unit == NULL)
1068 return -ENOMEM;
1069
1070 unit->id = buffer[3];
1071 unit->type = buffer[2];
1072 unit->processing.bSourceID = buffer[4];
1073 unit->processing.wMaxMultiplier =
9bc6218d 1074 get_unaligned_le16(&buffer[5]);
c0efd232
LP		 1075 unit->processing.bControlSize = buffer[7];
1076 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1077 memcpy(unit->processing.bmControls, &buffer[8], n);
1078 if (dev->uvc_version >= 0x0110)
1079 unit->processing.bmVideoStandards = buffer[9+n];
1080
1081 if (buffer[8+n] != 0)
1082 usb_string(udev, buffer[8+n], unit->name,
1083 sizeof unit->name);
1084 else
1085 sprintf(unit->name, "Processing %u", buffer[3]);
1086
1087 list_add_tail(&unit->list, &dev->entities);
1088 break;
1089
1090 case VC_EXTENSION_UNIT:
1091 p = buflen >= 22 ? buffer[21] : 0;
1092 n = buflen >= 24 + p ? buffer[22+p] : 0;
1093
1094 if (buflen < 24 + p + n) {
1095 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1096 "interface %d EXTENSION_UNIT error\n",
1097 udev->devnum, alts->desc.bInterfaceNumber);
1098 return -EINVAL;
1099 }
1100
1101 unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL);
1102 if (unit == NULL)
1103 return -ENOMEM;
1104
1105 unit->id = buffer[3];
1106 unit->type = buffer[2];
1107 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1108 unit->extension.bNumControls = buffer[20];
9bc6218d 1109 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
c0efd232
LP		 1110 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
1111 memcpy(unit->extension.baSourceID, &buffer[22], p);
1112 unit->extension.bControlSize = buffer[22+p];
1113 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
1114 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1115
1116 if (buffer[23+p+n] != 0)
1117 usb_string(udev, buffer[23+p+n], unit->name,
1118 sizeof unit->name);
1119 else
1120 sprintf(unit->name, "Extension %u", buffer[3]);
1121
1122 list_add_tail(&unit->list, &dev->entities);
1123 break;
1124
1125 default:
1126 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1127 "descriptor (%u)\n", buffer[2]);
1128 break;
1129 }
1130
1131 return 0;
1132}
1133
1134static int uvc_parse_control(struct uvc_device *dev)
1135{
1136 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1137 unsigned char *buffer = alts->extra;
1138 int buflen = alts->extralen;
1139 int ret;
1140
1141 /* Parse the default alternate setting only, as the UVC specification
1142 * defines a single alternate setting, the default alternate setting
1143 * zero.
1144 */
1145
1146 while (buflen > 2) {
1147 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1148 buffer[1] != USB_DT_CS_INTERFACE)
1149 goto next_descriptor;
1150
1151 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1152 return ret;
1153
1154next_descriptor:
1155 buflen -= buffer[0];
1156 buffer += buffer[0];
1157 }
1158
538e7a00
LP		 1159 /* Check if the optional status endpoint is present. Built-in iSight
1160 * webcams have an interrupt endpoint but spit proprietary data that
1161 * don't conform to the UVC status endpoint messages. Don't try to
1162 * handle the interrupt endpoint for those cameras.
1163 */
1164 if (alts->desc.bNumEndpoints == 1 &&
1165 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
c0efd232
LP		 1166 struct usb_host_endpoint *ep = &alts->endpoint[0];
1167 struct usb_endpoint_descriptor *desc = &ep->desc;
1168
1169 if (usb_endpoint_is_int_in(desc) &&
1170 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1171 desc->bInterval != 0) {
1172 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1173 "(addr %02x).\n", desc->bEndpointAddress);
1174 dev->int_ep = ep;
1175 }
1176 }
1177
1178 return 0;
1179}
1180
1181/* ------------------------------------------------------------------------
1182 * USB probe and disconnect
1183 */
1184
1185/*
1186 * Unregister the video devices.
1187 */
1188static void uvc_unregister_video(struct uvc_device *dev)
1189{
1190 if (dev->video.vdev) {
1191 if (dev->video.vdev->minor == -1)
1192 video_device_release(dev->video.vdev);
1193 else
1194 video_unregister_device(dev->video.vdev);
1195 dev->video.vdev = NULL;
1196 }
1197}
1198
1199/*
1200 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1201 * and containing the following units:
1202 *
1203 * - a USB Streaming Output Terminal
1204 * - zero or one Processing Unit
1205 * - zero, one or mode single-input Selector Units
1206 * - zero or one multiple-input Selector Units, provided all inputs are
1207 * connected to input terminals
1208 * - zero, one or mode single-input Extension Units
1209 * - one Camera Input Terminal, or one or more External terminals.
1210 *
1211 * A side forward scan is made on each detected entity to check for additional
1212 * extension units.
1213 */
1214static int uvc_scan_chain_entity(struct uvc_video_device *video,
1215 struct uvc_entity *entity)
1216{
1217 switch (UVC_ENTITY_TYPE(entity)) {
1218 case VC_EXTENSION_UNIT:
1219 if (uvc_trace_param & UVC_TRACE_PROBE)
1220 printk(" <- XU %d", entity->id);
1221
1222 if (entity->extension.bNrInPins != 1) {
1223 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1224 "than 1 input pin.\n", entity->id);
1225 return -1;
1226 }
1227
1228 list_add_tail(&entity->chain, &video->extensions);
1229 break;
1230
1231 case VC_PROCESSING_UNIT:
1232 if (uvc_trace_param & UVC_TRACE_PROBE)
1233 printk(" <- PU %d", entity->id);
1234
1235 if (video->processing != NULL) {
1236 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1237 "Processing Units in chain.\n");
1238 return -1;
1239 }
1240
1241 video->processing = entity;
1242 break;
1243
1244 case VC_SELECTOR_UNIT:
1245 if (uvc_trace_param & UVC_TRACE_PROBE)
1246 printk(" <- SU %d", entity->id);
1247
1248 /* Single-input selector units are ignored. */
1249 if (entity->selector.bNrInPins == 1)
1250 break;
1251
1252 if (video->selector != NULL) {
1253 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1254 "Units in chain.\n");
1255 return -1;
1256 }
1257
1258 video->selector = entity;
1259 break;
1260
1261 case ITT_VENDOR_SPECIFIC:
1262 case ITT_CAMERA:
1263 case ITT_MEDIA_TRANSPORT_INPUT:
1264 if (uvc_trace_param & UVC_TRACE_PROBE)
1265 printk(" <- IT %d\n", entity->id);
1266
1267 list_add_tail(&entity->chain, &video->iterms);
1268 break;
1269
ff924203
LP		 1270 case TT_STREAMING:
1271 if (uvc_trace_param & UVC_TRACE_PROBE)
1272 printk(" <- IT %d\n", entity->id);
1273
1274 if (!UVC_ENTITY_IS_ITERM(entity)) {
1275 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1276 "terminal %u.\n", entity->id);
1277 return -1;
1278 }
1279
1280 if (video->sterm != NULL) {
1281 uvc_trace(UVC_TRACE_DESCR, "Found multiple streaming "
1282 "entities in chain.\n");
1283 return -1;
1284 }
1285
1286 list_add_tail(&entity->chain, &video->iterms);
1287 video->sterm = entity;
1288 break;
1289
c0efd232
LP		 1290 default:
1291 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1292 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1293 return -1;
1294 }
1295
1296 return 0;
1297}
1298
1299static int uvc_scan_chain_forward(struct uvc_video_device *video,
1300 struct uvc_entity *entity, struct uvc_entity *prev)
1301{
1302 struct uvc_entity *forward;
1303 int found;
1304
1305 /* Forward scan */
1306 forward = NULL;
1307 found = 0;
1308
1309 while (1) {
1310 forward = uvc_entity_by_reference(video->dev, entity->id,
1311 forward);
1312 if (forward == NULL)
1313 break;
1314
1315 if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT ||
1316 forward == prev)
1317 continue;
1318
1319 if (forward->extension.bNrInPins != 1) {
1320 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has"
1321 "more than 1 input pin.\n", entity->id);
1322 return -1;
1323 }
1324
1325 list_add_tail(&forward->chain, &video->extensions);
1326 if (uvc_trace_param & UVC_TRACE_PROBE) {
1327 if (!found)
1328 printk(" (-> XU");
1329
1330 printk(" %d", forward->id);
1331 found = 1;
1332 }
1333 }
1334 if (found)
1335 printk(")");
1336
1337 return 0;
1338}
1339
1340static int uvc_scan_chain_backward(struct uvc_video_device *video,
1341 struct uvc_entity *entity)
1342{
1343 struct uvc_entity *term;
1344 int id = -1, i;
1345
1346 switch (UVC_ENTITY_TYPE(entity)) {
1347 case VC_EXTENSION_UNIT:
1348 id = entity->extension.baSourceID[0];
1349 break;
1350
1351 case VC_PROCESSING_UNIT:
1352 id = entity->processing.bSourceID;
1353 break;
1354
1355 case VC_SELECTOR_UNIT:
1356 /* Single-input selector units are ignored. */
1357 if (entity->selector.bNrInPins == 1) {
1358 id = entity->selector.baSourceID[0];
1359 break;
1360 }
1361
1362 if (uvc_trace_param & UVC_TRACE_PROBE)
1363 printk(" <- IT");
1364
1365 video->selector = entity;
1366 for (i = 0; i < entity->selector.bNrInPins; ++i) {
1367 id = entity->selector.baSourceID[i];
1368 term = uvc_entity_by_id(video->dev, id);
1369 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1370 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1371 "input %d isn't connected to an "
1372 "input terminal\n", entity->id, i);
1373 return -1;
1374 }
1375
1376 if (uvc_trace_param & UVC_TRACE_PROBE)
1377 printk(" %d", term->id);
1378
1379 list_add_tail(&term->chain, &video->iterms);
1380 uvc_scan_chain_forward(video, term, entity);
1381 }
1382
1383 if (uvc_trace_param & UVC_TRACE_PROBE)
1384 printk("\n");
1385
1386 id = 0;
1387 break;
1388 }
1389
1390 return id;
1391}
1392
1393static int uvc_scan_chain(struct uvc_video_device *video)
1394{
1395 struct uvc_entity *entity, *prev;
1396 int id;
1397
1398 entity = video->oterm;
1399 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id);
ff924203
LP		 1400
1401 if (UVC_ENTITY_TYPE(entity) == TT_STREAMING)
1402 video->sterm = entity;
1403
c0efd232
LP		 1404 id = entity->output.bSourceID;
1405 while (id != 0) {
1406 prev = entity;
1407 entity = uvc_entity_by_id(video->dev, id);
1408 if (entity == NULL) {
1409 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1410 "unknown entity %d.\n", id);
1411 return -1;
1412 }
1413
1414 /* Process entity */
1415 if (uvc_scan_chain_entity(video, entity) < 0)
1416 return -1;
1417
1418 /* Forward scan */
1419 if (uvc_scan_chain_forward(video, entity, prev) < 0)
1420 return -1;
1421
1422 /* Stop when a terminal is found. */
1423 if (!UVC_ENTITY_IS_UNIT(entity))
1424 break;
1425
1426 /* Backward scan */
1427 id = uvc_scan_chain_backward(video, entity);
1428 if (id < 0)
1429 return id;
1430 }
1431
ff924203
LP		 1432 if (video->sterm == NULL) {
1433 uvc_trace(UVC_TRACE_DESCR, "No streaming entity found in "
1434 "chain.\n");
1435 return -1;
1436 }
c0efd232
LP		 1437
1438 return 0;
1439}
1440
1441/*
1442 * Register the video devices.
1443 *
1444 * The driver currently supports a single video device per control interface
1445 * only. The terminal and units must match the following structure:
1446 *
ff924203
LP		 1447 * ITT_* -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING
1448 * TT_STREAMING -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> OTT_*
c0efd232
LP		 1449 *
1450 * The Extension Units, if present, must have a single input pin. The
1451 * Processing Unit and Extension Units can be in any order. Additional
1452 * Extension Units connected to the main chain as single-unit branches are
1453 * also supported.
1454 */
1455static int uvc_register_video(struct uvc_device *dev)
1456{
1457 struct video_device *vdev;
1458 struct uvc_entity *term;
1459 int found = 0, ret;
1460
1461 /* Check if the control interface matches the structure we expect. */
1462 list_for_each_entry(term, &dev->entities, list) {
1463 struct uvc_streaming *streaming;
1464
ff924203 1465 if (!UVC_ENTITY_IS_TERM(term) || !UVC_ENTITY_IS_OTERM(term))
c0efd232
LP		 1466 continue;
1467
1468 memset(&dev->video, 0, sizeof dev->video);
1469 mutex_init(&dev->video.ctrl_mutex);
1470 INIT_LIST_HEAD(&dev->video.iterms);
1471 INIT_LIST_HEAD(&dev->video.extensions);
1472 dev->video.oterm = term;
1473 dev->video.dev = dev;
1474 if (uvc_scan_chain(&dev->video) < 0)
1475 continue;
1476
1477 list_for_each_entry(streaming, &dev->streaming, list) {
ff924203
LP		 1478 if (streaming->header.bTerminalLink ==
1479 dev->video.sterm->id) {
c0efd232
LP		 1480 dev->video.streaming = streaming;
1481 found = 1;
1482 break;
1483 }
1484 }
1485
1486 if (found)
1487 break;
1488 }
1489
1490 if (!found) {
1491 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1492 return -1;
1493 }
1494
1495 if (uvc_trace_param & UVC_TRACE_PROBE) {
1496 uvc_printk(KERN_INFO, "Found a valid video chain (");
1497 list_for_each_entry(term, &dev->video.iterms, chain) {
1498 printk("%d", term->id);
1499 if (term->chain.next != &dev->video.iterms)
1500 printk(",");
1501 }
1502 printk(" -> %d).\n", dev->video.oterm->id);
1503 }
1504
ff924203
LP		 1505 /* Initialize the video buffers queue. */
1506 uvc_queue_init(&dev->video.queue, dev->video.streaming->type);
1507
c0efd232
LP		 1508 /* Initialize the streaming interface with default streaming
1509 * parameters.
1510 */
1511 if ((ret = uvc_video_init(&dev->video)) < 0) {
1512 uvc_printk(KERN_ERR, "Failed to initialize the device "
1513 "(%d).\n", ret);
1514 return ret;
1515 }
1516
1517 /* Register the device with V4L. */
1518 vdev = video_device_alloc();
1519 if (vdev == NULL)
1520 return -1;
1521
1522 /* We already hold a reference to dev->udev. The video device will be
1523 * unregistered before the reference is released, so we don't need to
1524 * get another one.
1525 */
5e85e732 1526 vdev->parent = &dev->intf->dev;
c0efd232
LP		 1527 vdev->minor = -1;
1528 vdev->fops = &uvc_fops;
1529 vdev->release = video_device_release;
1530 strncpy(vdev->name, dev->name, sizeof vdev->name);
1531
1532 /* Set the driver data before calling video_register_device, otherwise
1533 * uvc_v4l2_open might race us.
1534 *
1535 * FIXME: usb_set_intfdata hasn't been called so far. Is that a
1536 * problem ? Does any function which could be called here get
1537 * a pointer to the usb_interface ?
1538 */
1539 dev->video.vdev = vdev;
1540 video_set_drvdata(vdev, &dev->video);
1541
1542 if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
1543 dev->video.vdev = NULL;
1544 video_device_release(vdev);
1545 return -1;
1546 }
1547
1548 return 0;
1549}
1550
1551/*
1552 * Delete the UVC device.
1553 *
1554 * Called by the kernel when the last reference to the uvc_device structure
1555 * is released.
1556 *
1557 * Unregistering the video devices is done here because every opened instance
1558 * must be closed before the device can be unregistered. An alternative would
1559 * have been to use another reference count for uvc_v4l2_open/uvc_release, and
1560 * unregister the video devices on disconnect when that reference count drops
1561 * to zero.
1562 *
1563 * As this function is called after or during disconnect(), all URBs have
1564 * already been canceled by the USB core. There is no need to kill the
1565 * interrupt URB manually.
1566 */
1567void uvc_delete(struct kref *kref)
1568{
1569 struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
1570 struct list_head *p, *n;
1571
1572 /* Unregister the video device */
1573 uvc_unregister_video(dev);
1574 usb_put_intf(dev->intf);
1575 usb_put_dev(dev->udev);
1576
1577 uvc_status_cleanup(dev);
1578 uvc_ctrl_cleanup_device(dev);
1579
1580 list_for_each_safe(p, n, &dev->entities) {
1581 struct uvc_entity *entity;
1582 entity = list_entry(p, struct uvc_entity, list);
1583 kfree(entity);
1584 }
1585
1586 list_for_each_safe(p, n, &dev->streaming) {
1587 struct uvc_streaming *streaming;
1588 streaming = list_entry(p, struct uvc_streaming, list);
1589 usb_driver_release_interface(&uvc_driver.driver,
1590 streaming->intf);
1591 usb_put_intf(streaming->intf);
1592 kfree(streaming->format);
1593 kfree(streaming->header.bmaControls);
1594 kfree(streaming);
1595 }
1596
1597 kfree(dev);
1598}
1599
1600static int uvc_probe(struct usb_interface *intf,
1601 const struct usb_device_id *id)
1602{
1603 struct usb_device *udev = interface_to_usbdev(intf);
1604 struct uvc_device *dev;
1605 int ret;
1606
1607 if (id->idVendor && id->idProduct)
1608 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1609 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1610 id->idProduct);
1611 else
1612 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1613 udev->devpath);
1614
1615 /* Allocate memory for the device and initialize it */
1616 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1617 return -ENOMEM;
1618
1619 INIT_LIST_HEAD(&dev->entities);
1620 INIT_LIST_HEAD(&dev->streaming);
1621 kref_init(&dev->kref);
1622
1623 dev->udev = usb_get_dev(udev);
1624 dev->intf = usb_get_intf(intf);
1625 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1626 dev->quirks = id->driver_info | uvc_quirks_param;
1627
1628 if (udev->product != NULL)
1629 strncpy(dev->name, udev->product, sizeof dev->name);
1630 else
1631 snprintf(dev->name, sizeof dev->name,
1632 "UVC Camera (%04x:%04x)",
1633 le16_to_cpu(udev->descriptor.idVendor),
1634 le16_to_cpu(udev->descriptor.idProduct));
1635
1636 /* Parse the Video Class control descriptor */
1637 if (uvc_parse_control(dev) < 0) {
1638 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1639 "descriptors.\n");
1640 goto error;
1641 }
1642
1643 uvc_printk(KERN_INFO, "Found UVC %u.%02u device %s (%04x:%04x)\n",
1644 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1645 udev->product ? udev->product : "<unnamed>",
1646 le16_to_cpu(udev->descriptor.idVendor),
1647 le16_to_cpu(udev->descriptor.idProduct));
1648
1649 if (uvc_quirks_param != 0) {
1650 uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module "
1651 "parameter for testing purpose.\n", uvc_quirks_param);
1652 uvc_printk(KERN_INFO, "Please report required quirks to the "
1653 "linux-uvc-devel mailing list.\n");
1654 }
1655
1656 /* Initialize controls */
1657 if (uvc_ctrl_init_device(dev) < 0)
1658 goto error;
1659
1660 /* Register the video devices */
1661 if (uvc_register_video(dev) < 0)
1662 goto error;
1663
1664 /* Save our data pointer in the interface data */
1665 usb_set_intfdata(intf, dev);
1666
1667 /* Initialize the interrupt URB */
1668 if ((ret = uvc_status_init(dev)) < 0) {
1669 uvc_printk(KERN_INFO, "Unable to initialize the status "
1670 "endpoint (%d), status interrupt will not be "
1671 "supported.\n", ret);
1672 }
1673
1674 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1675 return 0;
1676
1677error:
1678 kref_put(&dev->kref, uvc_delete);
1679 return -ENODEV;
1680}
1681
1682static void uvc_disconnect(struct usb_interface *intf)
1683{
1684 struct uvc_device *dev = usb_get_intfdata(intf);
1685
1686 /* Set the USB interface data to NULL. This can be done outside the
1687 * lock, as there's no other reader.
1688 */
1689 usb_set_intfdata(intf, NULL);
1690
1691 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING)
1692 return;
1693
1694 /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide
1695 * lock is needed to prevent uvc_disconnect from releasing its
1696 * reference to the uvc_device instance after uvc_v4l2_open() received
1697 * the pointer to the device (video_devdata) but before it got the
1698 * chance to increase the reference count (kref_get).
a9e28585
LP		 1699 *
1700 * Note that the reference can't be released with the lock held,
1701 * otherwise a AB-BA deadlock can occur with videodev_lock that
1702 * videodev acquires in videodev_open() and video_unregister_device().
c0efd232
LP		 1703 */
1704 mutex_lock(&uvc_driver.open_mutex);
c0efd232 1705 dev->state |= UVC_DEV_DISCONNECTED;
c0efd232 1706 mutex_unlock(&uvc_driver.open_mutex);
a9e28585
LP		 1707
1708 kref_put(&dev->kref, uvc_delete);
c0efd232
LP		 1709}
1710
1711static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1712{
1713 struct uvc_device *dev = usb_get_intfdata(intf);
1714
1715 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1716 intf->cur_altsetting->desc.bInterfaceNumber);
1717
1718 /* Controls are cached on the fly so they don't need to be saved. */
1719 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL)
1720 return uvc_status_suspend(dev);
1721
1722 if (dev->video.streaming->intf != intf) {
1723 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
1724 "interface mismatch.\n");
1725 return -EINVAL;
1726 }
1727
1728 return uvc_video_suspend(&dev->video);
1729}
1730
9b0ae867 1731static int __uvc_resume(struct usb_interface *intf, int reset)
c0efd232
LP		 1732{
1733 struct uvc_device *dev = usb_get_intfdata(intf);
1734 int ret;
1735
1736 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1737 intf->cur_altsetting->desc.bInterfaceNumber);
1738
1739 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) {
9b0ae867 1740 if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0)
c0efd232
LP		 1741 return ret;
1742
1743 return uvc_status_resume(dev);
1744 }
1745
1746 if (dev->video.streaming->intf != intf) {
1747 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
1748 "interface mismatch.\n");
1749 return -EINVAL;
1750 }
1751
1752 return uvc_video_resume(&dev->video);
1753}
1754
9b0ae867
LP		 1755static int uvc_resume(struct usb_interface *intf)
1756{
1757 return __uvc_resume(intf, 0);
1758}
1759
1760static int uvc_reset_resume(struct usb_interface *intf)
1761{
1762 return __uvc_resume(intf, 1);
1763}
1764
c0efd232
LP		 1765/* ------------------------------------------------------------------------
1766 * Driver initialization and cleanup
1767 */
1768
1769/*
1770 * The Logitech cameras listed below have their interface class set to
1771 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1772 * though they are compliant.
1773 */
1774static struct usb_device_id uvc_ids[] = {
c0efd232
LP		 1775 /* Microsoft Lifecam NX-6000 */
1776 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1777 | USB_DEVICE_ID_MATCH_INT_INFO,
1778 .idVendor = 0x045e,
1779 .idProduct = 0x00f8,
1780 .bInterfaceClass = USB_CLASS_VIDEO,
1781 .bInterfaceSubClass = 1,
1782 .bInterfaceProtocol = 0,
1783 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1784 /* Microsoft Lifecam VX-7000 */
1785 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1786 | USB_DEVICE_ID_MATCH_INT_INFO,
1787 .idVendor = 0x045e,
1788 .idProduct = 0x0723,
1789 .bInterfaceClass = USB_CLASS_VIDEO,
1790 .bInterfaceSubClass = 1,
1791 .bInterfaceProtocol = 0,
1792 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1793 /* Logitech Quickcam Fusion */
1794 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1795 | USB_DEVICE_ID_MATCH_INT_INFO,
1796 .idVendor = 0x046d,
1797 .idProduct = 0x08c1,
1798 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1799 .bInterfaceSubClass = 1,
1800 .bInterfaceProtocol = 0 },
1801 /* Logitech Quickcam Orbit MP */
1802 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1803 | USB_DEVICE_ID_MATCH_INT_INFO,
1804 .idVendor = 0x046d,
1805 .idProduct = 0x08c2,
1806 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1807 .bInterfaceSubClass = 1,
1808 .bInterfaceProtocol = 0 },
1809 /* Logitech Quickcam Pro for Notebook */
1810 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1811 | USB_DEVICE_ID_MATCH_INT_INFO,
1812 .idVendor = 0x046d,
1813 .idProduct = 0x08c3,
1814 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1815 .bInterfaceSubClass = 1,
1816 .bInterfaceProtocol = 0 },
1817 /* Logitech Quickcam Pro 5000 */
1818 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1819 | USB_DEVICE_ID_MATCH_INT_INFO,
1820 .idVendor = 0x046d,
1821 .idProduct = 0x08c5,
1822 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1823 .bInterfaceSubClass = 1,
1824 .bInterfaceProtocol = 0 },
1825 /* Logitech Quickcam OEM Dell Notebook */
1826 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1827 | USB_DEVICE_ID_MATCH_INT_INFO,
1828 .idVendor = 0x046d,
1829 .idProduct = 0x08c6,
1830 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1831 .bInterfaceSubClass = 1,
1832 .bInterfaceProtocol = 0 },
1833 /* Logitech Quickcam OEM Cisco VT Camera II */
1834 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1835 | USB_DEVICE_ID_MATCH_INT_INFO,
1836 .idVendor = 0x046d,
1837 .idProduct = 0x08c7,
1838 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1839 .bInterfaceSubClass = 1,
1840 .bInterfaceProtocol = 0 },
1841 /* Apple Built-In iSight */
1842 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1843 | USB_DEVICE_ID_MATCH_INT_INFO,
1844 .idVendor = 0x05ac,
1845 .idProduct = 0x8501,
1846 .bInterfaceClass = USB_CLASS_VIDEO,
1847 .bInterfaceSubClass = 1,
1848 .bInterfaceProtocol = 0,
1849 .driver_info = UVC_QUIRK_PROBE_MINMAX
1850 | UVC_QUIRK_BUILTIN_ISIGHT },
1851 /* Genesys Logic USB 2.0 PC Camera */
1852 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1853 | USB_DEVICE_ID_MATCH_INT_INFO,
1854 .idVendor = 0x05e3,
1855 .idProduct = 0x0505,
1856 .bInterfaceClass = USB_CLASS_VIDEO,
1857 .bInterfaceSubClass = 1,
1858 .bInterfaceProtocol = 0,
1859 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1860 /* MT6227 */
1861 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1862 | USB_DEVICE_ID_MATCH_INT_INFO,
1863 .idVendor = 0x0e8d,
1864 .idProduct = 0x0004,
1865 .bInterfaceClass = USB_CLASS_VIDEO,
1866 .bInterfaceSubClass = 1,
1867 .bInterfaceProtocol = 0,
1868 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1869 /* Syntek (HP Spartan) */
1870 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1871 | USB_DEVICE_ID_MATCH_INT_INFO,
1872 .idVendor = 0x174f,
1873 .idProduct = 0x5212,
1874 .bInterfaceClass = USB_CLASS_VIDEO,
1875 .bInterfaceSubClass = 1,
1876 .bInterfaceProtocol = 0,
25e69850 1877 .driver_info = UVC_QUIRK_STREAM_NO_FID },
562f0fed
LP		 1878 /* Syntek (Samsung Q310) */
1879 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1880 | USB_DEVICE_ID_MATCH_INT_INFO,
1881 .idVendor = 0x174f,
1882 .idProduct = 0x5931,
1883 .bInterfaceClass = USB_CLASS_VIDEO,
1884 .bInterfaceSubClass = 1,
1885 .bInterfaceProtocol = 0,
1886 .driver_info = UVC_QUIRK_STREAM_NO_FID },
25e69850
LP		 1887 /* Asus F9SG */
1888 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1889 | USB_DEVICE_ID_MATCH_INT_INFO,
1890 .idVendor = 0x174f,
1891 .idProduct = 0x8a31,
1892 .bInterfaceClass = USB_CLASS_VIDEO,
1893 .bInterfaceSubClass = 1,
1894 .bInterfaceProtocol = 0,
c0efd232
LP		 1895 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1896 /* Syntek (Asus U3S) */
1897 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1898 | USB_DEVICE_ID_MATCH_INT_INFO,
1899 .idVendor = 0x174f,
1900 .idProduct = 0x8a33,
1901 .bInterfaceClass = USB_CLASS_VIDEO,
1902 .bInterfaceSubClass = 1,
1903 .bInterfaceProtocol = 0,
1904 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2f38483b
LP		 1905 /* Lenovo Thinkpad SL500 */
1906 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1907 | USB_DEVICE_ID_MATCH_INT_INFO,
1908 .idVendor = 0x17ef,
1909 .idProduct = 0x480b,
1910 .bInterfaceClass = USB_CLASS_VIDEO,
1911 .bInterfaceSubClass = 1,
1912 .bInterfaceProtocol = 0,
1913 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1914 /* Ecamm Pico iMage */
1915 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1916 | USB_DEVICE_ID_MATCH_INT_INFO,
1917 .idVendor = 0x18cd,
1918 .idProduct = 0xcafe,
1919 .bInterfaceClass = USB_CLASS_VIDEO,
1920 .bInterfaceSubClass = 1,
1921 .bInterfaceProtocol = 0,
1922 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1923 /* Bodelin ProScopeHR */
1924 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1925 | USB_DEVICE_ID_MATCH_DEV_HI
1926 | USB_DEVICE_ID_MATCH_INT_INFO,
1927 .idVendor = 0x19ab,
1928 .idProduct = 0x1000,
1929 .bcdDevice_hi = 0x0126,
1930 .bInterfaceClass = USB_CLASS_VIDEO,
1931 .bInterfaceSubClass = 1,
1932 .bInterfaceProtocol = 0,
1933 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
1934 /* SiGma Micro USB Web Camera */
1935 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1936 | USB_DEVICE_ID_MATCH_INT_INFO,
1937 .idVendor = 0x1c4f,
1938 .idProduct = 0x3000,
1939 .bInterfaceClass = USB_CLASS_VIDEO,
1940 .bInterfaceSubClass = 1,
1941 .bInterfaceProtocol = 0,
1942 .driver_info = UVC_QUIRK_PROBE_MINMAX
2bdd29cf
LP		 1943 | UVC_QUIRK_IGNORE_SELECTOR_UNIT
1944 | UVC_QUIRK_PRUNE_CONTROLS },
c0efd232
LP		 1945 /* Generic USB Video Class */
1946 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
1947 {}
1948};
1949
1950MODULE_DEVICE_TABLE(usb, uvc_ids);
1951
1952struct uvc_driver uvc_driver = {
1953 .driver = {
1954 .name = "uvcvideo",
1955 .probe = uvc_probe,
1956 .disconnect = uvc_disconnect,
1957 .suspend = uvc_suspend,
1958 .resume = uvc_resume,
9b0ae867 1959 .reset_resume = uvc_reset_resume,
c0efd232
LP		 1960 .id_table = uvc_ids,
1961 .supports_autosuspend = 1,
1962 },
1963};
1964
1965static int __init uvc_init(void)
1966{
1967 int result;
1968
1969 INIT_LIST_HEAD(&uvc_driver.devices);
1970 INIT_LIST_HEAD(&uvc_driver.controls);
1971 mutex_init(&uvc_driver.open_mutex);
1972 mutex_init(&uvc_driver.ctrl_mutex);
1973
1974 uvc_ctrl_init();
1975
1976 result = usb_register(&uvc_driver.driver);
1977 if (result == 0)
1978 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
1979 return result;
1980}
1981
1982static void __exit uvc_cleanup(void)
1983{
1984 usb_deregister(&uvc_driver.driver);
1985}
1986
1987module_init(uvc_init);
1988module_exit(uvc_cleanup);
1989
0fbd8ee6
LP		 1990module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
1991MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
c0efd232
LP		 1992module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
1993MODULE_PARM_DESC(quirks, "Forced device quirks");
1994module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
1995MODULE_PARM_DESC(trace, "Trace level bitmask");
1996
1997MODULE_AUTHOR(DRIVER_AUTHOR);
1998MODULE_DESCRIPTION(DRIVER_DESC);
1999MODULE_LICENSE("GPL");
2000MODULE_VERSION(DRIVER_VERSION);
f87086e3 2001
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