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V4L/DVB (10102): uvcvideo: Ignore interrupt endpoint for built-in iSight webcams.
[deliverable/linux.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/*
15 * This driver aims to support video input devices compliant with the 'USB
16 * Video Class' specification.
17 *
18 * The driver doesn't support the deprecated v4l1 interface. It implements the
19 * mmap capture method only, and doesn't do any image format conversion in
20 * software. If your user-space application doesn't support YUYV or MJPEG, fix
21 * it :-). Please note that the MJPEG data have been stripped from their
22 * Huffman tables (DHT marker), you will need to add it back if your JPEG
23 * codec can't handle MJPEG data.
24 */
25
26#include <linux/kernel.h>
27#include <linux/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. */
612 if (buffer[2] == VS_OUTPUT_HEADER) {
613 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
614 "%d OUTPUT HEADER descriptor is not supported.\n",
615 dev->udev->devnum, alts->desc.bInterfaceNumber);
616 goto error;
617 } else if (buffer[2] == VS_INPUT_HEADER) {
618 p = buflen >= 5 ? buffer[3] : 0;
619 n = buflen >= 12 ? buffer[12] : 0;
620
621 if (buflen < 13 + p*n || buffer[2] != VS_INPUT_HEADER) {
622 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
623 "interface %d INPUT HEADER descriptor is "
624 "invalid.\n", dev->udev->devnum,
625 alts->desc.bInterfaceNumber);
626 goto error;
627 }
628
629 streaming->header.bNumFormats = p;
630 streaming->header.bEndpointAddress = buffer[6];
631 streaming->header.bmInfo = buffer[7];
632 streaming->header.bTerminalLink = buffer[8];
633 streaming->header.bStillCaptureMethod = buffer[9];
634 streaming->header.bTriggerSupport = buffer[10];
635 streaming->header.bTriggerUsage = buffer[11];
636 streaming->header.bControlSize = n;
637
638 streaming->header.bmaControls = kmalloc(p*n, GFP_KERNEL);
639 if (streaming->header.bmaControls == NULL) {
640 ret = -ENOMEM;
641 goto error;
642 }
643
644 memcpy(streaming->header.bmaControls, &buffer[13], p*n);
645 } else {
646 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
647 "%d HEADER descriptor not found.\n", dev->udev->devnum,
648 alts->desc.bInterfaceNumber);
649 goto error;
650 }
651
652 buflen -= buffer[0];
653 buffer += buffer[0];
654
655 _buffer = buffer;
656 _buflen = buflen;
657
658 /* Count the format and frame descriptors. */
659 while (_buflen > 2) {
660 switch (_buffer[2]) {
661 case VS_FORMAT_UNCOMPRESSED:
662 case VS_FORMAT_MJPEG:
663 case VS_FORMAT_FRAME_BASED:
664 nformats++;
665 break;
666
667 case VS_FORMAT_DV:
668 /* DV format has no frame descriptor. We will create a
669 * dummy frame descriptor with a dummy frame interval.
670 */
671 nformats++;
672 nframes++;
673 nintervals++;
674 break;
675
676 case VS_FORMAT_MPEG2TS:
677 case VS_FORMAT_STREAM_BASED:
678 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
679 "interface %d FORMAT %u is not supported.\n",
680 dev->udev->devnum,
681 alts->desc.bInterfaceNumber, _buffer[2]);
682 break;
683
684 case VS_FRAME_UNCOMPRESSED:
685 case VS_FRAME_MJPEG:
686 nframes++;
687 if (_buflen > 25)
688 nintervals += _buffer[25] ? _buffer[25] : 3;
689 break;
690
691 case VS_FRAME_FRAME_BASED:
692 nframes++;
693 if (_buflen > 21)
694 nintervals += _buffer[21] ? _buffer[21] : 3;
695 break;
696 }
697
698 _buflen -= _buffer[0];
699 _buffer += _buffer[0];
700 }
701
702 if (nformats == 0) {
703 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
704 "%d has no supported formats defined.\n",
705 dev->udev->devnum, alts->desc.bInterfaceNumber);
706 goto error;
707 }
708
709 size = nformats * sizeof *format + nframes * sizeof *frame
710 + nintervals * sizeof *interval;
711 format = kzalloc(size, GFP_KERNEL);
712 if (format == NULL) {
713 ret = -ENOMEM;
714 goto error;
715 }
716
717 frame = (struct uvc_frame *)&format[nformats];
718 interval = (__u32 *)&frame[nframes];
719
720 streaming->format = format;
721 streaming->nformats = nformats;
722
723 /* Parse the format descriptors. */
724 while (buflen > 2) {
725 switch (buffer[2]) {
726 case VS_FORMAT_UNCOMPRESSED:
727 case VS_FORMAT_MJPEG:
728 case VS_FORMAT_DV:
729 case VS_FORMAT_FRAME_BASED:
730 format->frame = frame;
731 ret = uvc_parse_format(dev, streaming, format,
732 &interval, buffer, buflen);
733 if (ret < 0)
734 goto error;
735
736 frame += format->nframes;
737 format++;
738
739 buflen -= ret;
740 buffer += ret;
741 continue;
742
743 default:
744 break;
745 }
746
747 buflen -= buffer[0];
748 buffer += buffer[0];
749 }
750
751 /* Parse the alternate settings to find the maximum bandwidth. */
752 for (i = 0; i < intf->num_altsetting; ++i) {
753 struct usb_host_endpoint *ep;
754 alts = &intf->altsetting[i];
755 ep = uvc_find_endpoint(alts,
756 streaming->header.bEndpointAddress);
757 if (ep == NULL)
758 continue;
759
760 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
761 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
762 if (psize > streaming->maxpsize)
763 streaming->maxpsize = psize;
764 }
765
766 list_add_tail(&streaming->list, &dev->streaming);
767 return 0;
768
769error:
770 usb_driver_release_interface(&uvc_driver.driver, intf);
771 usb_put_intf(intf);
772 kfree(streaming->format);
773 kfree(streaming->header.bmaControls);
774 kfree(streaming);
775 return ret;
776}
777
778/* Parse vendor-specific extensions. */
779static int uvc_parse_vendor_control(struct uvc_device *dev,
780 const unsigned char *buffer, int buflen)
781{
782 struct usb_device *udev = dev->udev;
783 struct usb_host_interface *alts = dev->intf->cur_altsetting;
784 struct uvc_entity *unit;
785 unsigned int n, p;
786 int handled = 0;
787
788 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
789 case 0x046d: /* Logitech */
790 if (buffer[1] != 0x41 || buffer[2] != 0x01)
791 break;
792
793 /* Logitech implements several vendor specific functions
794 * through vendor specific extension units (LXU).
795 *
796 * The LXU descriptors are similar to XU descriptors
797 * (see "USB Device Video Class for Video Devices", section
798 * 3.7.2.6 "Extension Unit Descriptor") with the following
799 * differences:
800 *
801 * ----------------------------------------------------------
802 * 0 bLength 1 Number
803 * Size of this descriptor, in bytes: 24+p+n*2
804 * ----------------------------------------------------------
805 * 23+p+n bmControlsType N Bitmap
806 * Individual bits in the set are defined:
807 * 0: Absolute
808 * 1: Relative
809 *
810 * This bitset is mapped exactly the same as bmControls.
811 * ----------------------------------------------------------
812 * 23+p+n*2 bReserved 1 Boolean
813 * ----------------------------------------------------------
814 * 24+p+n*2 iExtension 1 Index
815 * Index of a string descriptor that describes this
816 * extension unit.
817 * ----------------------------------------------------------
818 */
819 p = buflen >= 22 ? buffer[21] : 0;
820 n = buflen >= 25 + p ? buffer[22+p] : 0;
821
822 if (buflen < 25 + p + 2*n) {
823 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
824 "interface %d EXTENSION_UNIT error\n",
825 udev->devnum, alts->desc.bInterfaceNumber);
826 break;
827 }
828
829 unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL);
830 if (unit == NULL)
831 return -ENOMEM;
832
833 unit->id = buffer[3];
834 unit->type = VC_EXTENSION_UNIT;
835 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
836 unit->extension.bNumControls = buffer[20];
9bc6218d 837 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
c0efd232
LP		 838 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
839 memcpy(unit->extension.baSourceID, &buffer[22], p);
840 unit->extension.bControlSize = buffer[22+p];
841 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
842 unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit
843 + p + n;
844 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
845
846 if (buffer[24+p+2*n] != 0)
847 usb_string(udev, buffer[24+p+2*n], unit->name,
848 sizeof unit->name);
849 else
850 sprintf(unit->name, "Extension %u", buffer[3]);
851
852 list_add_tail(&unit->list, &dev->entities);
853 handled = 1;
854 break;
855 }
856
857 return handled;
858}
859
860static int uvc_parse_standard_control(struct uvc_device *dev,
861 const unsigned char *buffer, int buflen)
862{
863 struct usb_device *udev = dev->udev;
864 struct uvc_entity *unit, *term;
865 struct usb_interface *intf;
866 struct usb_host_interface *alts = dev->intf->cur_altsetting;
867 unsigned int i, n, p, len;
868 __u16 type;
869
870 switch (buffer[2]) {
871 case VC_HEADER:
872 n = buflen >= 12 ? buffer[11] : 0;
873
874 if (buflen < 12 || buflen < 12 + n) {
875 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
876 "interface %d HEADER error\n", udev->devnum,
877 alts->desc.bInterfaceNumber);
878 return -EINVAL;
879 }
880
9bc6218d
MH		 881 dev->uvc_version = get_unaligned_le16(&buffer[3]);
882 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
c0efd232
LP		 883
884 /* Parse all USB Video Streaming interfaces. */
885 for (i = 0; i < n; ++i) {
886 intf = usb_ifnum_to_if(udev, buffer[12+i]);
887 if (intf == NULL) {
888 uvc_trace(UVC_TRACE_DESCR, "device %d "
889 "interface %d doesn't exists\n",
890 udev->devnum, i);
891 continue;
892 }
893
894 uvc_parse_streaming(dev, intf);
895 }
896 break;
897
898 case VC_INPUT_TERMINAL:
899 if (buflen < 8) {
900 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
901 "interface %d INPUT_TERMINAL error\n",
902 udev->devnum, alts->desc.bInterfaceNumber);
903 return -EINVAL;
904 }
905
906 /* Make sure the terminal type MSB is not null, otherwise it
907 * could be confused with a unit.
908 */
9bc6218d 909 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 910 if ((type & 0xff00) == 0) {
911 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
912 "interface %d INPUT_TERMINAL %d has invalid "
913 "type 0x%04x, skipping\n", udev->devnum,
914 alts->desc.bInterfaceNumber,
915 buffer[3], type);
916 return 0;
917 }
918
919 n = 0;
920 p = 0;
921 len = 8;
922
923 if (type == ITT_CAMERA) {
924 n = buflen >= 15 ? buffer[14] : 0;
925 len = 15;
926
927 } else if (type == ITT_MEDIA_TRANSPORT_INPUT) {
928 n = buflen >= 9 ? buffer[8] : 0;
929 p = buflen >= 10 + n ? buffer[9+n] : 0;
930 len = 10;
931 }
932
933 if (buflen < len + n + p) {
934 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
935 "interface %d INPUT_TERMINAL error\n",
936 udev->devnum, alts->desc.bInterfaceNumber);
937 return -EINVAL;
938 }
939
940 term = kzalloc(sizeof *term + n + p, GFP_KERNEL);
941 if (term == NULL)
942 return -ENOMEM;
943
944 term->id = buffer[3];
945 term->type = type | UVC_TERM_INPUT;
946
947 if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) {
948 term->camera.bControlSize = n;
949 term->camera.bmControls = (__u8 *)term + sizeof *term;
950 term->camera.wObjectiveFocalLengthMin =
9bc6218d 951 get_unaligned_le16(&buffer[8]);
c0efd232 952 term->camera.wObjectiveFocalLengthMax =
9bc6218d 953 get_unaligned_le16(&buffer[10]);
c0efd232 954 term->camera.wOcularFocalLength =
9bc6218d 955 get_unaligned_le16(&buffer[12]);
c0efd232
LP		 956 memcpy(term->camera.bmControls, &buffer[15], n);
957 } else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) {
958 term->media.bControlSize = n;
959 term->media.bmControls = (__u8 *)term + sizeof *term;
960 term->media.bTransportModeSize = p;
961 term->media.bmTransportModes = (__u8 *)term
962 + sizeof *term + n;
963 memcpy(term->media.bmControls, &buffer[9], n);
964 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
965 }
966
967 if (buffer[7] != 0)
968 usb_string(udev, buffer[7], term->name,
969 sizeof term->name);
970 else if (UVC_ENTITY_TYPE(term) == ITT_CAMERA)
971 sprintf(term->name, "Camera %u", buffer[3]);
972 else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT)
973 sprintf(term->name, "Media %u", buffer[3]);
974 else
975 sprintf(term->name, "Input %u", buffer[3]);
976
977 list_add_tail(&term->list, &dev->entities);
978 break;
979
980 case VC_OUTPUT_TERMINAL:
981 if (buflen < 9) {
982 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
983 "interface %d OUTPUT_TERMINAL error\n",
984 udev->devnum, alts->desc.bInterfaceNumber);
985 return -EINVAL;
986 }
987
988 /* Make sure the terminal type MSB is not null, otherwise it
989 * could be confused with a unit.
990 */
9bc6218d 991 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 992 if ((type & 0xff00) == 0) {
993 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
994 "interface %d OUTPUT_TERMINAL %d has invalid "
995 "type 0x%04x, skipping\n", udev->devnum,
996 alts->desc.bInterfaceNumber, buffer[3], type);
997 return 0;
998 }
999
1000 term = kzalloc(sizeof *term, GFP_KERNEL);
1001 if (term == NULL)
1002 return -ENOMEM;
1003
1004 term->id = buffer[3];
1005 term->type = type | UVC_TERM_OUTPUT;
1006 term->output.bSourceID = buffer[7];
1007
1008 if (buffer[8] != 0)
1009 usb_string(udev, buffer[8], term->name,
1010 sizeof term->name);
1011 else
1012 sprintf(term->name, "Output %u", buffer[3]);
1013
1014 list_add_tail(&term->list, &dev->entities);
1015 break;
1016
1017 case VC_SELECTOR_UNIT:
1018 p = buflen >= 5 ? buffer[4] : 0;
1019
1020 if (buflen < 5 || buflen < 6 + p) {
1021 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1022 "interface %d SELECTOR_UNIT error\n",
1023 udev->devnum, alts->desc.bInterfaceNumber);
1024 return -EINVAL;
1025 }
1026
1027 unit = kzalloc(sizeof *unit + p, GFP_KERNEL);
1028 if (unit == NULL)
1029 return -ENOMEM;
1030
1031 unit->id = buffer[3];
1032 unit->type = buffer[2];
1033 unit->selector.bNrInPins = buffer[4];
1034 unit->selector.baSourceID = (__u8 *)unit + sizeof *unit;
1035 memcpy(unit->selector.baSourceID, &buffer[5], p);
1036
1037 if (buffer[5+p] != 0)
1038 usb_string(udev, buffer[5+p], unit->name,
1039 sizeof unit->name);
1040 else
1041 sprintf(unit->name, "Selector %u", buffer[3]);
1042
1043 list_add_tail(&unit->list, &dev->entities);
1044 break;
1045
1046 case VC_PROCESSING_UNIT:
1047 n = buflen >= 8 ? buffer[7] : 0;
1048 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1049
1050 if (buflen < p + n) {
1051 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1052 "interface %d PROCESSING_UNIT error\n",
1053 udev->devnum, alts->desc.bInterfaceNumber);
1054 return -EINVAL;
1055 }
1056
1057 unit = kzalloc(sizeof *unit + n, GFP_KERNEL);
1058 if (unit == NULL)
1059 return -ENOMEM;
1060
1061 unit->id = buffer[3];
1062 unit->type = buffer[2];
1063 unit->processing.bSourceID = buffer[4];
1064 unit->processing.wMaxMultiplier =
9bc6218d 1065 get_unaligned_le16(&buffer[5]);
c0efd232
LP		 1066 unit->processing.bControlSize = buffer[7];
1067 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1068 memcpy(unit->processing.bmControls, &buffer[8], n);
1069 if (dev->uvc_version >= 0x0110)
1070 unit->processing.bmVideoStandards = buffer[9+n];
1071
1072 if (buffer[8+n] != 0)
1073 usb_string(udev, buffer[8+n], unit->name,
1074 sizeof unit->name);
1075 else
1076 sprintf(unit->name, "Processing %u", buffer[3]);
1077
1078 list_add_tail(&unit->list, &dev->entities);
1079 break;
1080
1081 case VC_EXTENSION_UNIT:
1082 p = buflen >= 22 ? buffer[21] : 0;
1083 n = buflen >= 24 + p ? buffer[22+p] : 0;
1084
1085 if (buflen < 24 + p + n) {
1086 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1087 "interface %d EXTENSION_UNIT error\n",
1088 udev->devnum, alts->desc.bInterfaceNumber);
1089 return -EINVAL;
1090 }
1091
1092 unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL);
1093 if (unit == NULL)
1094 return -ENOMEM;
1095
1096 unit->id = buffer[3];
1097 unit->type = buffer[2];
1098 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1099 unit->extension.bNumControls = buffer[20];
9bc6218d 1100 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
c0efd232
LP		 1101 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
1102 memcpy(unit->extension.baSourceID, &buffer[22], p);
1103 unit->extension.bControlSize = buffer[22+p];
1104 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
1105 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1106
1107 if (buffer[23+p+n] != 0)
1108 usb_string(udev, buffer[23+p+n], unit->name,
1109 sizeof unit->name);
1110 else
1111 sprintf(unit->name, "Extension %u", buffer[3]);
1112
1113 list_add_tail(&unit->list, &dev->entities);
1114 break;
1115
1116 default:
1117 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1118 "descriptor (%u)\n", buffer[2]);
1119 break;
1120 }
1121
1122 return 0;
1123}
1124
1125static int uvc_parse_control(struct uvc_device *dev)
1126{
1127 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1128 unsigned char *buffer = alts->extra;
1129 int buflen = alts->extralen;
1130 int ret;
1131
1132 /* Parse the default alternate setting only, as the UVC specification
1133 * defines a single alternate setting, the default alternate setting
1134 * zero.
1135 */
1136
1137 while (buflen > 2) {
1138 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1139 buffer[1] != USB_DT_CS_INTERFACE)
1140 goto next_descriptor;
1141
1142 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1143 return ret;
1144
1145next_descriptor:
1146 buflen -= buffer[0];
1147 buffer += buffer[0];
1148 }
1149
538e7a00
LP		 1150 /* Check if the optional status endpoint is present. Built-in iSight
1151 * webcams have an interrupt endpoint but spit proprietary data that
1152 * don't conform to the UVC status endpoint messages. Don't try to
1153 * handle the interrupt endpoint for those cameras.
1154 */
1155 if (alts->desc.bNumEndpoints == 1 &&
1156 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
c0efd232
LP		 1157 struct usb_host_endpoint *ep = &alts->endpoint[0];
1158 struct usb_endpoint_descriptor *desc = &ep->desc;
1159
1160 if (usb_endpoint_is_int_in(desc) &&
1161 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1162 desc->bInterval != 0) {
1163 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1164 "(addr %02x).\n", desc->bEndpointAddress);
1165 dev->int_ep = ep;
1166 }
1167 }
1168
1169 return 0;
1170}
1171
1172/* ------------------------------------------------------------------------
1173 * USB probe and disconnect
1174 */
1175
1176/*
1177 * Unregister the video devices.
1178 */
1179static void uvc_unregister_video(struct uvc_device *dev)
1180{
1181 if (dev->video.vdev) {
1182 if (dev->video.vdev->minor == -1)
1183 video_device_release(dev->video.vdev);
1184 else
1185 video_unregister_device(dev->video.vdev);
1186 dev->video.vdev = NULL;
1187 }
1188}
1189
1190/*
1191 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1192 * and containing the following units:
1193 *
1194 * - a USB Streaming Output Terminal
1195 * - zero or one Processing Unit
1196 * - zero, one or mode single-input Selector Units
1197 * - zero or one multiple-input Selector Units, provided all inputs are
1198 * connected to input terminals
1199 * - zero, one or mode single-input Extension Units
1200 * - one Camera Input Terminal, or one or more External terminals.
1201 *
1202 * A side forward scan is made on each detected entity to check for additional
1203 * extension units.
1204 */
1205static int uvc_scan_chain_entity(struct uvc_video_device *video,
1206 struct uvc_entity *entity)
1207{
1208 switch (UVC_ENTITY_TYPE(entity)) {
1209 case VC_EXTENSION_UNIT:
1210 if (uvc_trace_param & UVC_TRACE_PROBE)
1211 printk(" <- XU %d", entity->id);
1212
1213 if (entity->extension.bNrInPins != 1) {
1214 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1215 "than 1 input pin.\n", entity->id);
1216 return -1;
1217 }
1218
1219 list_add_tail(&entity->chain, &video->extensions);
1220 break;
1221
1222 case VC_PROCESSING_UNIT:
1223 if (uvc_trace_param & UVC_TRACE_PROBE)
1224 printk(" <- PU %d", entity->id);
1225
1226 if (video->processing != NULL) {
1227 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1228 "Processing Units in chain.\n");
1229 return -1;
1230 }
1231
1232 video->processing = entity;
1233 break;
1234
1235 case VC_SELECTOR_UNIT:
1236 if (uvc_trace_param & UVC_TRACE_PROBE)
1237 printk(" <- SU %d", entity->id);
1238
1239 /* Single-input selector units are ignored. */
1240 if (entity->selector.bNrInPins == 1)
1241 break;
1242
1243 if (video->selector != NULL) {
1244 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1245 "Units in chain.\n");
1246 return -1;
1247 }
1248
1249 video->selector = entity;
1250 break;
1251
1252 case ITT_VENDOR_SPECIFIC:
1253 case ITT_CAMERA:
1254 case ITT_MEDIA_TRANSPORT_INPUT:
1255 if (uvc_trace_param & UVC_TRACE_PROBE)
1256 printk(" <- IT %d\n", entity->id);
1257
1258 list_add_tail(&entity->chain, &video->iterms);
1259 break;
1260
1261 default:
1262 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1263 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1264 return -1;
1265 }
1266
1267 return 0;
1268}
1269
1270static int uvc_scan_chain_forward(struct uvc_video_device *video,
1271 struct uvc_entity *entity, struct uvc_entity *prev)
1272{
1273 struct uvc_entity *forward;
1274 int found;
1275
1276 /* Forward scan */
1277 forward = NULL;
1278 found = 0;
1279
1280 while (1) {
1281 forward = uvc_entity_by_reference(video->dev, entity->id,
1282 forward);
1283 if (forward == NULL)
1284 break;
1285
1286 if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT ||
1287 forward == prev)
1288 continue;
1289
1290 if (forward->extension.bNrInPins != 1) {
1291 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has"
1292 "more than 1 input pin.\n", entity->id);
1293 return -1;
1294 }
1295
1296 list_add_tail(&forward->chain, &video->extensions);
1297 if (uvc_trace_param & UVC_TRACE_PROBE) {
1298 if (!found)
1299 printk(" (-> XU");
1300
1301 printk(" %d", forward->id);
1302 found = 1;
1303 }
1304 }
1305 if (found)
1306 printk(")");
1307
1308 return 0;
1309}
1310
1311static int uvc_scan_chain_backward(struct uvc_video_device *video,
1312 struct uvc_entity *entity)
1313{
1314 struct uvc_entity *term;
1315 int id = -1, i;
1316
1317 switch (UVC_ENTITY_TYPE(entity)) {
1318 case VC_EXTENSION_UNIT:
1319 id = entity->extension.baSourceID[0];
1320 break;
1321
1322 case VC_PROCESSING_UNIT:
1323 id = entity->processing.bSourceID;
1324 break;
1325
1326 case VC_SELECTOR_UNIT:
1327 /* Single-input selector units are ignored. */
1328 if (entity->selector.bNrInPins == 1) {
1329 id = entity->selector.baSourceID[0];
1330 break;
1331 }
1332
1333 if (uvc_trace_param & UVC_TRACE_PROBE)
1334 printk(" <- IT");
1335
1336 video->selector = entity;
1337 for (i = 0; i < entity->selector.bNrInPins; ++i) {
1338 id = entity->selector.baSourceID[i];
1339 term = uvc_entity_by_id(video->dev, id);
1340 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1341 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1342 "input %d isn't connected to an "
1343 "input terminal\n", entity->id, i);
1344 return -1;
1345 }
1346
1347 if (uvc_trace_param & UVC_TRACE_PROBE)
1348 printk(" %d", term->id);
1349
1350 list_add_tail(&term->chain, &video->iterms);
1351 uvc_scan_chain_forward(video, term, entity);
1352 }
1353
1354 if (uvc_trace_param & UVC_TRACE_PROBE)
1355 printk("\n");
1356
1357 id = 0;
1358 break;
1359 }
1360
1361 return id;
1362}
1363
1364static int uvc_scan_chain(struct uvc_video_device *video)
1365{
1366 struct uvc_entity *entity, *prev;
1367 int id;
1368
1369 entity = video->oterm;
1370 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id);
1371 id = entity->output.bSourceID;
1372 while (id != 0) {
1373 prev = entity;
1374 entity = uvc_entity_by_id(video->dev, id);
1375 if (entity == NULL) {
1376 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1377 "unknown entity %d.\n", id);
1378 return -1;
1379 }
1380
1381 /* Process entity */
1382 if (uvc_scan_chain_entity(video, entity) < 0)
1383 return -1;
1384
1385 /* Forward scan */
1386 if (uvc_scan_chain_forward(video, entity, prev) < 0)
1387 return -1;
1388
1389 /* Stop when a terminal is found. */
1390 if (!UVC_ENTITY_IS_UNIT(entity))
1391 break;
1392
1393 /* Backward scan */
1394 id = uvc_scan_chain_backward(video, entity);
1395 if (id < 0)
1396 return id;
1397 }
1398
1399 /* Initialize the video buffers queue. */
1400 uvc_queue_init(&video->queue);
1401
1402 return 0;
1403}
1404
1405/*
1406 * Register the video devices.
1407 *
1408 * The driver currently supports a single video device per control interface
1409 * only. The terminal and units must match the following structure:
1410 *
1411 * ITT_CAMERA -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING
1412 *
1413 * The Extension Units, if present, must have a single input pin. The
1414 * Processing Unit and Extension Units can be in any order. Additional
1415 * Extension Units connected to the main chain as single-unit branches are
1416 * also supported.
1417 */
1418static int uvc_register_video(struct uvc_device *dev)
1419{
1420 struct video_device *vdev;
1421 struct uvc_entity *term;
1422 int found = 0, ret;
1423
1424 /* Check if the control interface matches the structure we expect. */
1425 list_for_each_entry(term, &dev->entities, list) {
1426 struct uvc_streaming *streaming;
1427
1428 if (UVC_ENTITY_TYPE(term) != TT_STREAMING)
1429 continue;
1430
1431 memset(&dev->video, 0, sizeof dev->video);
1432 mutex_init(&dev->video.ctrl_mutex);
1433 INIT_LIST_HEAD(&dev->video.iterms);
1434 INIT_LIST_HEAD(&dev->video.extensions);
1435 dev->video.oterm = term;
1436 dev->video.dev = dev;
1437 if (uvc_scan_chain(&dev->video) < 0)
1438 continue;
1439
1440 list_for_each_entry(streaming, &dev->streaming, list) {
1441 if (streaming->header.bTerminalLink == term->id) {
1442 dev->video.streaming = streaming;
1443 found = 1;
1444 break;
1445 }
1446 }
1447
1448 if (found)
1449 break;
1450 }
1451
1452 if (!found) {
1453 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1454 return -1;
1455 }
1456
1457 if (uvc_trace_param & UVC_TRACE_PROBE) {
1458 uvc_printk(KERN_INFO, "Found a valid video chain (");
1459 list_for_each_entry(term, &dev->video.iterms, chain) {
1460 printk("%d", term->id);
1461 if (term->chain.next != &dev->video.iterms)
1462 printk(",");
1463 }
1464 printk(" -> %d).\n", dev->video.oterm->id);
1465 }
1466
1467 /* Initialize the streaming interface with default streaming
1468 * parameters.
1469 */
1470 if ((ret = uvc_video_init(&dev->video)) < 0) {
1471 uvc_printk(KERN_ERR, "Failed to initialize the device "
1472 "(%d).\n", ret);
1473 return ret;
1474 }
1475
1476 /* Register the device with V4L. */
1477 vdev = video_device_alloc();
1478 if (vdev == NULL)
1479 return -1;
1480
1481 /* We already hold a reference to dev->udev. The video device will be
1482 * unregistered before the reference is released, so we don't need to
1483 * get another one.
1484 */
5e85e732 1485 vdev->parent = &dev->intf->dev;
c0efd232
LP		 1486 vdev->minor = -1;
1487 vdev->fops = &uvc_fops;
1488 vdev->release = video_device_release;
1489 strncpy(vdev->name, dev->name, sizeof vdev->name);
1490
1491 /* Set the driver data before calling video_register_device, otherwise
1492 * uvc_v4l2_open might race us.
1493 *
1494 * FIXME: usb_set_intfdata hasn't been called so far. Is that a
1495 * problem ? Does any function which could be called here get
1496 * a pointer to the usb_interface ?
1497 */
1498 dev->video.vdev = vdev;
1499 video_set_drvdata(vdev, &dev->video);
1500
1501 if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
1502 dev->video.vdev = NULL;
1503 video_device_release(vdev);
1504 return -1;
1505 }
1506
1507 return 0;
1508}
1509
1510/*
1511 * Delete the UVC device.
1512 *
1513 * Called by the kernel when the last reference to the uvc_device structure
1514 * is released.
1515 *
1516 * Unregistering the video devices is done here because every opened instance
1517 * must be closed before the device can be unregistered. An alternative would
1518 * have been to use another reference count for uvc_v4l2_open/uvc_release, and
1519 * unregister the video devices on disconnect when that reference count drops
1520 * to zero.
1521 *
1522 * As this function is called after or during disconnect(), all URBs have
1523 * already been canceled by the USB core. There is no need to kill the
1524 * interrupt URB manually.
1525 */
1526void uvc_delete(struct kref *kref)
1527{
1528 struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
1529 struct list_head *p, *n;
1530
1531 /* Unregister the video device */
1532 uvc_unregister_video(dev);
1533 usb_put_intf(dev->intf);
1534 usb_put_dev(dev->udev);
1535
1536 uvc_status_cleanup(dev);
1537 uvc_ctrl_cleanup_device(dev);
1538
1539 list_for_each_safe(p, n, &dev->entities) {
1540 struct uvc_entity *entity;
1541 entity = list_entry(p, struct uvc_entity, list);
1542 kfree(entity);
1543 }
1544
1545 list_for_each_safe(p, n, &dev->streaming) {
1546 struct uvc_streaming *streaming;
1547 streaming = list_entry(p, struct uvc_streaming, list);
1548 usb_driver_release_interface(&uvc_driver.driver,
1549 streaming->intf);
1550 usb_put_intf(streaming->intf);
1551 kfree(streaming->format);
1552 kfree(streaming->header.bmaControls);
1553 kfree(streaming);
1554 }
1555
1556 kfree(dev);
1557}
1558
1559static int uvc_probe(struct usb_interface *intf,
1560 const struct usb_device_id *id)
1561{
1562 struct usb_device *udev = interface_to_usbdev(intf);
1563 struct uvc_device *dev;
1564 int ret;
1565
1566 if (id->idVendor && id->idProduct)
1567 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1568 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1569 id->idProduct);
1570 else
1571 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1572 udev->devpath);
1573
1574 /* Allocate memory for the device and initialize it */
1575 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1576 return -ENOMEM;
1577
1578 INIT_LIST_HEAD(&dev->entities);
1579 INIT_LIST_HEAD(&dev->streaming);
1580 kref_init(&dev->kref);
1581
1582 dev->udev = usb_get_dev(udev);
1583 dev->intf = usb_get_intf(intf);
1584 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1585 dev->quirks = id->driver_info | uvc_quirks_param;
1586
1587 if (udev->product != NULL)
1588 strncpy(dev->name, udev->product, sizeof dev->name);
1589 else
1590 snprintf(dev->name, sizeof dev->name,
1591 "UVC Camera (%04x:%04x)",
1592 le16_to_cpu(udev->descriptor.idVendor),
1593 le16_to_cpu(udev->descriptor.idProduct));
1594
1595 /* Parse the Video Class control descriptor */
1596 if (uvc_parse_control(dev) < 0) {
1597 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1598 "descriptors.\n");
1599 goto error;
1600 }
1601
1602 uvc_printk(KERN_INFO, "Found UVC %u.%02u device %s (%04x:%04x)\n",
1603 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1604 udev->product ? udev->product : "<unnamed>",
1605 le16_to_cpu(udev->descriptor.idVendor),
1606 le16_to_cpu(udev->descriptor.idProduct));
1607
1608 if (uvc_quirks_param != 0) {
1609 uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module "
1610 "parameter for testing purpose.\n", uvc_quirks_param);
1611 uvc_printk(KERN_INFO, "Please report required quirks to the "
1612 "linux-uvc-devel mailing list.\n");
1613 }
1614
1615 /* Initialize controls */
1616 if (uvc_ctrl_init_device(dev) < 0)
1617 goto error;
1618
1619 /* Register the video devices */
1620 if (uvc_register_video(dev) < 0)
1621 goto error;
1622
1623 /* Save our data pointer in the interface data */
1624 usb_set_intfdata(intf, dev);
1625
1626 /* Initialize the interrupt URB */
1627 if ((ret = uvc_status_init(dev)) < 0) {
1628 uvc_printk(KERN_INFO, "Unable to initialize the status "
1629 "endpoint (%d), status interrupt will not be "
1630 "supported.\n", ret);
1631 }
1632
1633 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1634 return 0;
1635
1636error:
1637 kref_put(&dev->kref, uvc_delete);
1638 return -ENODEV;
1639}
1640
1641static void uvc_disconnect(struct usb_interface *intf)
1642{
1643 struct uvc_device *dev = usb_get_intfdata(intf);
1644
1645 /* Set the USB interface data to NULL. This can be done outside the
1646 * lock, as there's no other reader.
1647 */
1648 usb_set_intfdata(intf, NULL);
1649
1650 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING)
1651 return;
1652
1653 /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide
1654 * lock is needed to prevent uvc_disconnect from releasing its
1655 * reference to the uvc_device instance after uvc_v4l2_open() received
1656 * the pointer to the device (video_devdata) but before it got the
1657 * chance to increase the reference count (kref_get).
a9e28585
LP		 1658 *
1659 * Note that the reference can't be released with the lock held,
1660 * otherwise a AB-BA deadlock can occur with videodev_lock that
1661 * videodev acquires in videodev_open() and video_unregister_device().
c0efd232
LP		 1662 */
1663 mutex_lock(&uvc_driver.open_mutex);
c0efd232 1664 dev->state |= UVC_DEV_DISCONNECTED;
c0efd232 1665 mutex_unlock(&uvc_driver.open_mutex);
a9e28585
LP		 1666
1667 kref_put(&dev->kref, uvc_delete);
c0efd232
LP		 1668}
1669
1670static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1671{
1672 struct uvc_device *dev = usb_get_intfdata(intf);
1673
1674 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1675 intf->cur_altsetting->desc.bInterfaceNumber);
1676
1677 /* Controls are cached on the fly so they don't need to be saved. */
1678 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL)
1679 return uvc_status_suspend(dev);
1680
1681 if (dev->video.streaming->intf != intf) {
1682 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
1683 "interface mismatch.\n");
1684 return -EINVAL;
1685 }
1686
1687 return uvc_video_suspend(&dev->video);
1688}
1689
9b0ae867 1690static int __uvc_resume(struct usb_interface *intf, int reset)
c0efd232
LP		 1691{
1692 struct uvc_device *dev = usb_get_intfdata(intf);
1693 int ret;
1694
1695 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1696 intf->cur_altsetting->desc.bInterfaceNumber);
1697
1698 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) {
9b0ae867 1699 if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0)
c0efd232
LP		 1700 return ret;
1701
1702 return uvc_status_resume(dev);
1703 }
1704
1705 if (dev->video.streaming->intf != intf) {
1706 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
1707 "interface mismatch.\n");
1708 return -EINVAL;
1709 }
1710
1711 return uvc_video_resume(&dev->video);
1712}
1713
9b0ae867
LP		 1714static int uvc_resume(struct usb_interface *intf)
1715{
1716 return __uvc_resume(intf, 0);
1717}
1718
1719static int uvc_reset_resume(struct usb_interface *intf)
1720{
1721 return __uvc_resume(intf, 1);
1722}
1723
c0efd232
LP		 1724/* ------------------------------------------------------------------------
1725 * Driver initialization and cleanup
1726 */
1727
1728/*
1729 * The Logitech cameras listed below have their interface class set to
1730 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1731 * though they are compliant.
1732 */
1733static struct usb_device_id uvc_ids[] = {
c0efd232
LP		 1734 /* Microsoft Lifecam NX-6000 */
1735 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1736 | USB_DEVICE_ID_MATCH_INT_INFO,
1737 .idVendor = 0x045e,
1738 .idProduct = 0x00f8,
1739 .bInterfaceClass = USB_CLASS_VIDEO,
1740 .bInterfaceSubClass = 1,
1741 .bInterfaceProtocol = 0,
1742 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1743 /* Microsoft Lifecam VX-7000 */
1744 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1745 | USB_DEVICE_ID_MATCH_INT_INFO,
1746 .idVendor = 0x045e,
1747 .idProduct = 0x0723,
1748 .bInterfaceClass = USB_CLASS_VIDEO,
1749 .bInterfaceSubClass = 1,
1750 .bInterfaceProtocol = 0,
1751 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1752 /* Logitech Quickcam Fusion */
1753 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1754 | USB_DEVICE_ID_MATCH_INT_INFO,
1755 .idVendor = 0x046d,
1756 .idProduct = 0x08c1,
1757 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1758 .bInterfaceSubClass = 1,
1759 .bInterfaceProtocol = 0 },
1760 /* Logitech Quickcam Orbit MP */
1761 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1762 | USB_DEVICE_ID_MATCH_INT_INFO,
1763 .idVendor = 0x046d,
1764 .idProduct = 0x08c2,
1765 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1766 .bInterfaceSubClass = 1,
1767 .bInterfaceProtocol = 0 },
1768 /* Logitech Quickcam Pro for Notebook */
1769 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1770 | USB_DEVICE_ID_MATCH_INT_INFO,
1771 .idVendor = 0x046d,
1772 .idProduct = 0x08c3,
1773 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1774 .bInterfaceSubClass = 1,
1775 .bInterfaceProtocol = 0 },
1776 /* Logitech Quickcam Pro 5000 */
1777 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1778 | USB_DEVICE_ID_MATCH_INT_INFO,
1779 .idVendor = 0x046d,
1780 .idProduct = 0x08c5,
1781 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1782 .bInterfaceSubClass = 1,
1783 .bInterfaceProtocol = 0 },
1784 /* Logitech Quickcam OEM Dell Notebook */
1785 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1786 | USB_DEVICE_ID_MATCH_INT_INFO,
1787 .idVendor = 0x046d,
1788 .idProduct = 0x08c6,
1789 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1790 .bInterfaceSubClass = 1,
1791 .bInterfaceProtocol = 0 },
1792 /* Logitech Quickcam OEM Cisco VT Camera II */
1793 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1794 | USB_DEVICE_ID_MATCH_INT_INFO,
1795 .idVendor = 0x046d,
1796 .idProduct = 0x08c7,
1797 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1798 .bInterfaceSubClass = 1,
1799 .bInterfaceProtocol = 0 },
1800 /* Apple Built-In iSight */
1801 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1802 | USB_DEVICE_ID_MATCH_INT_INFO,
1803 .idVendor = 0x05ac,
1804 .idProduct = 0x8501,
1805 .bInterfaceClass = USB_CLASS_VIDEO,
1806 .bInterfaceSubClass = 1,
1807 .bInterfaceProtocol = 0,
1808 .driver_info = UVC_QUIRK_PROBE_MINMAX
1809 | UVC_QUIRK_BUILTIN_ISIGHT },
1810 /* Genesys Logic USB 2.0 PC Camera */
1811 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1812 | USB_DEVICE_ID_MATCH_INT_INFO,
1813 .idVendor = 0x05e3,
1814 .idProduct = 0x0505,
1815 .bInterfaceClass = USB_CLASS_VIDEO,
1816 .bInterfaceSubClass = 1,
1817 .bInterfaceProtocol = 0,
1818 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1819 /* MT6227 */
1820 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1821 | USB_DEVICE_ID_MATCH_INT_INFO,
1822 .idVendor = 0x0e8d,
1823 .idProduct = 0x0004,
1824 .bInterfaceClass = USB_CLASS_VIDEO,
1825 .bInterfaceSubClass = 1,
1826 .bInterfaceProtocol = 0,
1827 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1828 /* Syntek (HP Spartan) */
1829 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1830 | USB_DEVICE_ID_MATCH_INT_INFO,
1831 .idVendor = 0x174f,
1832 .idProduct = 0x5212,
1833 .bInterfaceClass = USB_CLASS_VIDEO,
1834 .bInterfaceSubClass = 1,
1835 .bInterfaceProtocol = 0,
25e69850 1836 .driver_info = UVC_QUIRK_STREAM_NO_FID },
562f0fed
LP		 1837 /* Syntek (Samsung Q310) */
1838 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1839 | USB_DEVICE_ID_MATCH_INT_INFO,
1840 .idVendor = 0x174f,
1841 .idProduct = 0x5931,
1842 .bInterfaceClass = USB_CLASS_VIDEO,
1843 .bInterfaceSubClass = 1,
1844 .bInterfaceProtocol = 0,
1845 .driver_info = UVC_QUIRK_STREAM_NO_FID },
25e69850
LP		 1846 /* Asus F9SG */
1847 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1848 | USB_DEVICE_ID_MATCH_INT_INFO,
1849 .idVendor = 0x174f,
1850 .idProduct = 0x8a31,
1851 .bInterfaceClass = USB_CLASS_VIDEO,
1852 .bInterfaceSubClass = 1,
1853 .bInterfaceProtocol = 0,
c0efd232
LP		 1854 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1855 /* Syntek (Asus U3S) */
1856 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1857 | USB_DEVICE_ID_MATCH_INT_INFO,
1858 .idVendor = 0x174f,
1859 .idProduct = 0x8a33,
1860 .bInterfaceClass = USB_CLASS_VIDEO,
1861 .bInterfaceSubClass = 1,
1862 .bInterfaceProtocol = 0,
1863 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2f38483b
LP		 1864 /* Lenovo Thinkpad SL500 */
1865 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1866 | USB_DEVICE_ID_MATCH_INT_INFO,
1867 .idVendor = 0x17ef,
1868 .idProduct = 0x480b,
1869 .bInterfaceClass = USB_CLASS_VIDEO,
1870 .bInterfaceSubClass = 1,
1871 .bInterfaceProtocol = 0,
1872 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1873 /* Ecamm Pico iMage */
1874 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1875 | USB_DEVICE_ID_MATCH_INT_INFO,
1876 .idVendor = 0x18cd,
1877 .idProduct = 0xcafe,
1878 .bInterfaceClass = USB_CLASS_VIDEO,
1879 .bInterfaceSubClass = 1,
1880 .bInterfaceProtocol = 0,
1881 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1882 /* Bodelin ProScopeHR */
1883 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1884 | USB_DEVICE_ID_MATCH_DEV_HI
1885 | USB_DEVICE_ID_MATCH_INT_INFO,
1886 .idVendor = 0x19ab,
1887 .idProduct = 0x1000,
1888 .bcdDevice_hi = 0x0126,
1889 .bInterfaceClass = USB_CLASS_VIDEO,
1890 .bInterfaceSubClass = 1,
1891 .bInterfaceProtocol = 0,
1892 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
1893 /* SiGma Micro USB Web Camera */
1894 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1895 | USB_DEVICE_ID_MATCH_INT_INFO,
1896 .idVendor = 0x1c4f,
1897 .idProduct = 0x3000,
1898 .bInterfaceClass = USB_CLASS_VIDEO,
1899 .bInterfaceSubClass = 1,
1900 .bInterfaceProtocol = 0,
1901 .driver_info = UVC_QUIRK_PROBE_MINMAX
2bdd29cf
LP		 1902 | UVC_QUIRK_IGNORE_SELECTOR_UNIT
1903 | UVC_QUIRK_PRUNE_CONTROLS },
c0efd232
LP		 1904 /* Generic USB Video Class */
1905 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
1906 {}
1907};
1908
1909MODULE_DEVICE_TABLE(usb, uvc_ids);
1910
1911struct uvc_driver uvc_driver = {
1912 .driver = {
1913 .name = "uvcvideo",
1914 .probe = uvc_probe,
1915 .disconnect = uvc_disconnect,
1916 .suspend = uvc_suspend,
1917 .resume = uvc_resume,
9b0ae867 1918 .reset_resume = uvc_reset_resume,
c0efd232
LP		 1919 .id_table = uvc_ids,
1920 .supports_autosuspend = 1,
1921 },
1922};
1923
1924static int __init uvc_init(void)
1925{
1926 int result;
1927
1928 INIT_LIST_HEAD(&uvc_driver.devices);
1929 INIT_LIST_HEAD(&uvc_driver.controls);
1930 mutex_init(&uvc_driver.open_mutex);
1931 mutex_init(&uvc_driver.ctrl_mutex);
1932
1933 uvc_ctrl_init();
1934
1935 result = usb_register(&uvc_driver.driver);
1936 if (result == 0)
1937 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
1938 return result;
1939}
1940
1941static void __exit uvc_cleanup(void)
1942{
1943 usb_deregister(&uvc_driver.driver);
1944}
1945
1946module_init(uvc_init);
1947module_exit(uvc_cleanup);
1948
0fbd8ee6
LP		 1949module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
1950MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
c0efd232
LP		 1951module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
1952MODULE_PARM_DESC(quirks, "Forced device quirks");
1953module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
1954MODULE_PARM_DESC(trace, "Trace level bitmask");
1955
1956MODULE_AUTHOR(DRIVER_AUTHOR);
1957MODULE_DESCRIPTION(DRIVER_DESC);
1958MODULE_LICENSE("GPL");
1959MODULE_VERSION(DRIVER_VERSION);
f87086e3 1960
Linux kernel - Deliverables
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