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V4L/DVB (10101): uvcvideo: Fix bulk URB processing when the header is erroneous
[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
1150 /* Check if the optional status endpoint is present. */
1151 if (alts->desc.bNumEndpoints == 1) {
1152 struct usb_host_endpoint *ep = &alts->endpoint[0];
1153 struct usb_endpoint_descriptor *desc = &ep->desc;
1154
1155 if (usb_endpoint_is_int_in(desc) &&
1156 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1157 desc->bInterval != 0) {
1158 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1159 "(addr %02x).\n", desc->bEndpointAddress);
1160 dev->int_ep = ep;
1161 }
1162 }
1163
1164 return 0;
1165}
1166
1167/* ------------------------------------------------------------------------
1168 * USB probe and disconnect
1169 */
1170
1171/*
1172 * Unregister the video devices.
1173 */
1174static void uvc_unregister_video(struct uvc_device *dev)
1175{
1176 if (dev->video.vdev) {
1177 if (dev->video.vdev->minor == -1)
1178 video_device_release(dev->video.vdev);
1179 else
1180 video_unregister_device(dev->video.vdev);
1181 dev->video.vdev = NULL;
1182 }
1183}
1184
1185/*
1186 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1187 * and containing the following units:
1188 *
1189 * - a USB Streaming Output Terminal
1190 * - zero or one Processing Unit
1191 * - zero, one or mode single-input Selector Units
1192 * - zero or one multiple-input Selector Units, provided all inputs are
1193 * connected to input terminals
1194 * - zero, one or mode single-input Extension Units
1195 * - one Camera Input Terminal, or one or more External terminals.
1196 *
1197 * A side forward scan is made on each detected entity to check for additional
1198 * extension units.
1199 */
1200static int uvc_scan_chain_entity(struct uvc_video_device *video,
1201 struct uvc_entity *entity)
1202{
1203 switch (UVC_ENTITY_TYPE(entity)) {
1204 case VC_EXTENSION_UNIT:
1205 if (uvc_trace_param & UVC_TRACE_PROBE)
1206 printk(" <- XU %d", entity->id);
1207
1208 if (entity->extension.bNrInPins != 1) {
1209 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1210 "than 1 input pin.\n", entity->id);
1211 return -1;
1212 }
1213
1214 list_add_tail(&entity->chain, &video->extensions);
1215 break;
1216
1217 case VC_PROCESSING_UNIT:
1218 if (uvc_trace_param & UVC_TRACE_PROBE)
1219 printk(" <- PU %d", entity->id);
1220
1221 if (video->processing != NULL) {
1222 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1223 "Processing Units in chain.\n");
1224 return -1;
1225 }
1226
1227 video->processing = entity;
1228 break;
1229
1230 case VC_SELECTOR_UNIT:
1231 if (uvc_trace_param & UVC_TRACE_PROBE)
1232 printk(" <- SU %d", entity->id);
1233
1234 /* Single-input selector units are ignored. */
1235 if (entity->selector.bNrInPins == 1)
1236 break;
1237
1238 if (video->selector != NULL) {
1239 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1240 "Units in chain.\n");
1241 return -1;
1242 }
1243
1244 video->selector = entity;
1245 break;
1246
1247 case ITT_VENDOR_SPECIFIC:
1248 case ITT_CAMERA:
1249 case ITT_MEDIA_TRANSPORT_INPUT:
1250 if (uvc_trace_param & UVC_TRACE_PROBE)
1251 printk(" <- IT %d\n", entity->id);
1252
1253 list_add_tail(&entity->chain, &video->iterms);
1254 break;
1255
1256 default:
1257 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1258 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1259 return -1;
1260 }
1261
1262 return 0;
1263}
1264
1265static int uvc_scan_chain_forward(struct uvc_video_device *video,
1266 struct uvc_entity *entity, struct uvc_entity *prev)
1267{
1268 struct uvc_entity *forward;
1269 int found;
1270
1271 /* Forward scan */
1272 forward = NULL;
1273 found = 0;
1274
1275 while (1) {
1276 forward = uvc_entity_by_reference(video->dev, entity->id,
1277 forward);
1278 if (forward == NULL)
1279 break;
1280
1281 if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT ||
1282 forward == prev)
1283 continue;
1284
1285 if (forward->extension.bNrInPins != 1) {
1286 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has"
1287 "more than 1 input pin.\n", entity->id);
1288 return -1;
1289 }
1290
1291 list_add_tail(&forward->chain, &video->extensions);
1292 if (uvc_trace_param & UVC_TRACE_PROBE) {
1293 if (!found)
1294 printk(" (-> XU");
1295
1296 printk(" %d", forward->id);
1297 found = 1;
1298 }
1299 }
1300 if (found)
1301 printk(")");
1302
1303 return 0;
1304}
1305
1306static int uvc_scan_chain_backward(struct uvc_video_device *video,
1307 struct uvc_entity *entity)
1308{
1309 struct uvc_entity *term;
1310 int id = -1, i;
1311
1312 switch (UVC_ENTITY_TYPE(entity)) {
1313 case VC_EXTENSION_UNIT:
1314 id = entity->extension.baSourceID[0];
1315 break;
1316
1317 case VC_PROCESSING_UNIT:
1318 id = entity->processing.bSourceID;
1319 break;
1320
1321 case VC_SELECTOR_UNIT:
1322 /* Single-input selector units are ignored. */
1323 if (entity->selector.bNrInPins == 1) {
1324 id = entity->selector.baSourceID[0];
1325 break;
1326 }
1327
1328 if (uvc_trace_param & UVC_TRACE_PROBE)
1329 printk(" <- IT");
1330
1331 video->selector = entity;
1332 for (i = 0; i < entity->selector.bNrInPins; ++i) {
1333 id = entity->selector.baSourceID[i];
1334 term = uvc_entity_by_id(video->dev, id);
1335 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1336 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1337 "input %d isn't connected to an "
1338 "input terminal\n", entity->id, i);
1339 return -1;
1340 }
1341
1342 if (uvc_trace_param & UVC_TRACE_PROBE)
1343 printk(" %d", term->id);
1344
1345 list_add_tail(&term->chain, &video->iterms);
1346 uvc_scan_chain_forward(video, term, entity);
1347 }
1348
1349 if (uvc_trace_param & UVC_TRACE_PROBE)
1350 printk("\n");
1351
1352 id = 0;
1353 break;
1354 }
1355
1356 return id;
1357}
1358
1359static int uvc_scan_chain(struct uvc_video_device *video)
1360{
1361 struct uvc_entity *entity, *prev;
1362 int id;
1363
1364 entity = video->oterm;
1365 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id);
1366 id = entity->output.bSourceID;
1367 while (id != 0) {
1368 prev = entity;
1369 entity = uvc_entity_by_id(video->dev, id);
1370 if (entity == NULL) {
1371 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1372 "unknown entity %d.\n", id);
1373 return -1;
1374 }
1375
1376 /* Process entity */
1377 if (uvc_scan_chain_entity(video, entity) < 0)
1378 return -1;
1379
1380 /* Forward scan */
1381 if (uvc_scan_chain_forward(video, entity, prev) < 0)
1382 return -1;
1383
1384 /* Stop when a terminal is found. */
1385 if (!UVC_ENTITY_IS_UNIT(entity))
1386 break;
1387
1388 /* Backward scan */
1389 id = uvc_scan_chain_backward(video, entity);
1390 if (id < 0)
1391 return id;
1392 }
1393
1394 /* Initialize the video buffers queue. */
1395 uvc_queue_init(&video->queue);
1396
1397 return 0;
1398}
1399
1400/*
1401 * Register the video devices.
1402 *
1403 * The driver currently supports a single video device per control interface
1404 * only. The terminal and units must match the following structure:
1405 *
1406 * ITT_CAMERA -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING
1407 *
1408 * The Extension Units, if present, must have a single input pin. The
1409 * Processing Unit and Extension Units can be in any order. Additional
1410 * Extension Units connected to the main chain as single-unit branches are
1411 * also supported.
1412 */
1413static int uvc_register_video(struct uvc_device *dev)
1414{
1415 struct video_device *vdev;
1416 struct uvc_entity *term;
1417 int found = 0, ret;
1418
1419 /* Check if the control interface matches the structure we expect. */
1420 list_for_each_entry(term, &dev->entities, list) {
1421 struct uvc_streaming *streaming;
1422
1423 if (UVC_ENTITY_TYPE(term) != TT_STREAMING)
1424 continue;
1425
1426 memset(&dev->video, 0, sizeof dev->video);
1427 mutex_init(&dev->video.ctrl_mutex);
1428 INIT_LIST_HEAD(&dev->video.iterms);
1429 INIT_LIST_HEAD(&dev->video.extensions);
1430 dev->video.oterm = term;
1431 dev->video.dev = dev;
1432 if (uvc_scan_chain(&dev->video) < 0)
1433 continue;
1434
1435 list_for_each_entry(streaming, &dev->streaming, list) {
1436 if (streaming->header.bTerminalLink == term->id) {
1437 dev->video.streaming = streaming;
1438 found = 1;
1439 break;
1440 }
1441 }
1442
1443 if (found)
1444 break;
1445 }
1446
1447 if (!found) {
1448 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1449 return -1;
1450 }
1451
1452 if (uvc_trace_param & UVC_TRACE_PROBE) {
1453 uvc_printk(KERN_INFO, "Found a valid video chain (");
1454 list_for_each_entry(term, &dev->video.iterms, chain) {
1455 printk("%d", term->id);
1456 if (term->chain.next != &dev->video.iterms)
1457 printk(",");
1458 }
1459 printk(" -> %d).\n", dev->video.oterm->id);
1460 }
1461
1462 /* Initialize the streaming interface with default streaming
1463 * parameters.
1464 */
1465 if ((ret = uvc_video_init(&dev->video)) < 0) {
1466 uvc_printk(KERN_ERR, "Failed to initialize the device "
1467 "(%d).\n", ret);
1468 return ret;
1469 }
1470
1471 /* Register the device with V4L. */
1472 vdev = video_device_alloc();
1473 if (vdev == NULL)
1474 return -1;
1475
1476 /* We already hold a reference to dev->udev. The video device will be
1477 * unregistered before the reference is released, so we don't need to
1478 * get another one.
1479 */
5e85e732 1480 vdev->parent = &dev->intf->dev;
c0efd232
LP		 1481 vdev->minor = -1;
1482 vdev->fops = &uvc_fops;
1483 vdev->release = video_device_release;
1484 strncpy(vdev->name, dev->name, sizeof vdev->name);
1485
1486 /* Set the driver data before calling video_register_device, otherwise
1487 * uvc_v4l2_open might race us.
1488 *
1489 * FIXME: usb_set_intfdata hasn't been called so far. Is that a
1490 * problem ? Does any function which could be called here get
1491 * a pointer to the usb_interface ?
1492 */
1493 dev->video.vdev = vdev;
1494 video_set_drvdata(vdev, &dev->video);
1495
1496 if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
1497 dev->video.vdev = NULL;
1498 video_device_release(vdev);
1499 return -1;
1500 }
1501
1502 return 0;
1503}
1504
1505/*
1506 * Delete the UVC device.
1507 *
1508 * Called by the kernel when the last reference to the uvc_device structure
1509 * is released.
1510 *
1511 * Unregistering the video devices is done here because every opened instance
1512 * must be closed before the device can be unregistered. An alternative would
1513 * have been to use another reference count for uvc_v4l2_open/uvc_release, and
1514 * unregister the video devices on disconnect when that reference count drops
1515 * to zero.
1516 *
1517 * As this function is called after or during disconnect(), all URBs have
1518 * already been canceled by the USB core. There is no need to kill the
1519 * interrupt URB manually.
1520 */
1521void uvc_delete(struct kref *kref)
1522{
1523 struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
1524 struct list_head *p, *n;
1525
1526 /* Unregister the video device */
1527 uvc_unregister_video(dev);
1528 usb_put_intf(dev->intf);
1529 usb_put_dev(dev->udev);
1530
1531 uvc_status_cleanup(dev);
1532 uvc_ctrl_cleanup_device(dev);
1533
1534 list_for_each_safe(p, n, &dev->entities) {
1535 struct uvc_entity *entity;
1536 entity = list_entry(p, struct uvc_entity, list);
1537 kfree(entity);
1538 }
1539
1540 list_for_each_safe(p, n, &dev->streaming) {
1541 struct uvc_streaming *streaming;
1542 streaming = list_entry(p, struct uvc_streaming, list);
1543 usb_driver_release_interface(&uvc_driver.driver,
1544 streaming->intf);
1545 usb_put_intf(streaming->intf);
1546 kfree(streaming->format);
1547 kfree(streaming->header.bmaControls);
1548 kfree(streaming);
1549 }
1550
1551 kfree(dev);
1552}
1553
1554static int uvc_probe(struct usb_interface *intf,
1555 const struct usb_device_id *id)
1556{
1557 struct usb_device *udev = interface_to_usbdev(intf);
1558 struct uvc_device *dev;
1559 int ret;
1560
1561 if (id->idVendor && id->idProduct)
1562 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1563 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1564 id->idProduct);
1565 else
1566 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1567 udev->devpath);
1568
1569 /* Allocate memory for the device and initialize it */
1570 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1571 return -ENOMEM;
1572
1573 INIT_LIST_HEAD(&dev->entities);
1574 INIT_LIST_HEAD(&dev->streaming);
1575 kref_init(&dev->kref);
1576
1577 dev->udev = usb_get_dev(udev);
1578 dev->intf = usb_get_intf(intf);
1579 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1580 dev->quirks = id->driver_info | uvc_quirks_param;
1581
1582 if (udev->product != NULL)
1583 strncpy(dev->name, udev->product, sizeof dev->name);
1584 else
1585 snprintf(dev->name, sizeof dev->name,
1586 "UVC Camera (%04x:%04x)",
1587 le16_to_cpu(udev->descriptor.idVendor),
1588 le16_to_cpu(udev->descriptor.idProduct));
1589
1590 /* Parse the Video Class control descriptor */
1591 if (uvc_parse_control(dev) < 0) {
1592 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1593 "descriptors.\n");
1594 goto error;
1595 }
1596
1597 uvc_printk(KERN_INFO, "Found UVC %u.%02u device %s (%04x:%04x)\n",
1598 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1599 udev->product ? udev->product : "<unnamed>",
1600 le16_to_cpu(udev->descriptor.idVendor),
1601 le16_to_cpu(udev->descriptor.idProduct));
1602
1603 if (uvc_quirks_param != 0) {
1604 uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module "
1605 "parameter for testing purpose.\n", uvc_quirks_param);
1606 uvc_printk(KERN_INFO, "Please report required quirks to the "
1607 "linux-uvc-devel mailing list.\n");
1608 }
1609
1610 /* Initialize controls */
1611 if (uvc_ctrl_init_device(dev) < 0)
1612 goto error;
1613
1614 /* Register the video devices */
1615 if (uvc_register_video(dev) < 0)
1616 goto error;
1617
1618 /* Save our data pointer in the interface data */
1619 usb_set_intfdata(intf, dev);
1620
1621 /* Initialize the interrupt URB */
1622 if ((ret = uvc_status_init(dev)) < 0) {
1623 uvc_printk(KERN_INFO, "Unable to initialize the status "
1624 "endpoint (%d), status interrupt will not be "
1625 "supported.\n", ret);
1626 }
1627
1628 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1629 return 0;
1630
1631error:
1632 kref_put(&dev->kref, uvc_delete);
1633 return -ENODEV;
1634}
1635
1636static void uvc_disconnect(struct usb_interface *intf)
1637{
1638 struct uvc_device *dev = usb_get_intfdata(intf);
1639
1640 /* Set the USB interface data to NULL. This can be done outside the
1641 * lock, as there's no other reader.
1642 */
1643 usb_set_intfdata(intf, NULL);
1644
1645 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING)
1646 return;
1647
1648 /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide
1649 * lock is needed to prevent uvc_disconnect from releasing its
1650 * reference to the uvc_device instance after uvc_v4l2_open() received
1651 * the pointer to the device (video_devdata) but before it got the
1652 * chance to increase the reference count (kref_get).
a9e28585
LP		 1653 *
1654 * Note that the reference can't be released with the lock held,
1655 * otherwise a AB-BA deadlock can occur with videodev_lock that
1656 * videodev acquires in videodev_open() and video_unregister_device().
c0efd232
LP		 1657 */
1658 mutex_lock(&uvc_driver.open_mutex);
c0efd232 1659 dev->state |= UVC_DEV_DISCONNECTED;
c0efd232 1660 mutex_unlock(&uvc_driver.open_mutex);
a9e28585
LP		 1661
1662 kref_put(&dev->kref, uvc_delete);
c0efd232
LP		 1663}
1664
1665static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1666{
1667 struct uvc_device *dev = usb_get_intfdata(intf);
1668
1669 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1670 intf->cur_altsetting->desc.bInterfaceNumber);
1671
1672 /* Controls are cached on the fly so they don't need to be saved. */
1673 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL)
1674 return uvc_status_suspend(dev);
1675
1676 if (dev->video.streaming->intf != intf) {
1677 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
1678 "interface mismatch.\n");
1679 return -EINVAL;
1680 }
1681
1682 return uvc_video_suspend(&dev->video);
1683}
1684
9b0ae867 1685static int __uvc_resume(struct usb_interface *intf, int reset)
c0efd232
LP		 1686{
1687 struct uvc_device *dev = usb_get_intfdata(intf);
1688 int ret;
1689
1690 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1691 intf->cur_altsetting->desc.bInterfaceNumber);
1692
1693 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) {
9b0ae867 1694 if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0)
c0efd232
LP		 1695 return ret;
1696
1697 return uvc_status_resume(dev);
1698 }
1699
1700 if (dev->video.streaming->intf != intf) {
1701 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
1702 "interface mismatch.\n");
1703 return -EINVAL;
1704 }
1705
1706 return uvc_video_resume(&dev->video);
1707}
1708
9b0ae867
LP		 1709static int uvc_resume(struct usb_interface *intf)
1710{
1711 return __uvc_resume(intf, 0);
1712}
1713
1714static int uvc_reset_resume(struct usb_interface *intf)
1715{
1716 return __uvc_resume(intf, 1);
1717}
1718
c0efd232
LP		 1719/* ------------------------------------------------------------------------
1720 * Driver initialization and cleanup
1721 */
1722
1723/*
1724 * The Logitech cameras listed below have their interface class set to
1725 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1726 * though they are compliant.
1727 */
1728static struct usb_device_id uvc_ids[] = {
c0efd232
LP		 1729 /* Microsoft Lifecam NX-6000 */
1730 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1731 | USB_DEVICE_ID_MATCH_INT_INFO,
1732 .idVendor = 0x045e,
1733 .idProduct = 0x00f8,
1734 .bInterfaceClass = USB_CLASS_VIDEO,
1735 .bInterfaceSubClass = 1,
1736 .bInterfaceProtocol = 0,
1737 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1738 /* Microsoft Lifecam VX-7000 */
1739 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1740 | USB_DEVICE_ID_MATCH_INT_INFO,
1741 .idVendor = 0x045e,
1742 .idProduct = 0x0723,
1743 .bInterfaceClass = USB_CLASS_VIDEO,
1744 .bInterfaceSubClass = 1,
1745 .bInterfaceProtocol = 0,
1746 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1747 /* Logitech Quickcam Fusion */
1748 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1749 | USB_DEVICE_ID_MATCH_INT_INFO,
1750 .idVendor = 0x046d,
1751 .idProduct = 0x08c1,
1752 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1753 .bInterfaceSubClass = 1,
1754 .bInterfaceProtocol = 0 },
1755 /* Logitech Quickcam Orbit MP */
1756 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1757 | USB_DEVICE_ID_MATCH_INT_INFO,
1758 .idVendor = 0x046d,
1759 .idProduct = 0x08c2,
1760 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1761 .bInterfaceSubClass = 1,
1762 .bInterfaceProtocol = 0 },
1763 /* Logitech Quickcam Pro for Notebook */
1764 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1765 | USB_DEVICE_ID_MATCH_INT_INFO,
1766 .idVendor = 0x046d,
1767 .idProduct = 0x08c3,
1768 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1769 .bInterfaceSubClass = 1,
1770 .bInterfaceProtocol = 0 },
1771 /* Logitech Quickcam Pro 5000 */
1772 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1773 | USB_DEVICE_ID_MATCH_INT_INFO,
1774 .idVendor = 0x046d,
1775 .idProduct = 0x08c5,
1776 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1777 .bInterfaceSubClass = 1,
1778 .bInterfaceProtocol = 0 },
1779 /* Logitech Quickcam OEM Dell Notebook */
1780 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1781 | USB_DEVICE_ID_MATCH_INT_INFO,
1782 .idVendor = 0x046d,
1783 .idProduct = 0x08c6,
1784 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1785 .bInterfaceSubClass = 1,
1786 .bInterfaceProtocol = 0 },
1787 /* Logitech Quickcam OEM Cisco VT Camera II */
1788 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1789 | USB_DEVICE_ID_MATCH_INT_INFO,
1790 .idVendor = 0x046d,
1791 .idProduct = 0x08c7,
1792 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1793 .bInterfaceSubClass = 1,
1794 .bInterfaceProtocol = 0 },
1795 /* Apple Built-In iSight */
1796 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1797 | USB_DEVICE_ID_MATCH_INT_INFO,
1798 .idVendor = 0x05ac,
1799 .idProduct = 0x8501,
1800 .bInterfaceClass = USB_CLASS_VIDEO,
1801 .bInterfaceSubClass = 1,
1802 .bInterfaceProtocol = 0,
1803 .driver_info = UVC_QUIRK_PROBE_MINMAX
1804 | UVC_QUIRK_BUILTIN_ISIGHT },
1805 /* Genesys Logic USB 2.0 PC Camera */
1806 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1807 | USB_DEVICE_ID_MATCH_INT_INFO,
1808 .idVendor = 0x05e3,
1809 .idProduct = 0x0505,
1810 .bInterfaceClass = USB_CLASS_VIDEO,
1811 .bInterfaceSubClass = 1,
1812 .bInterfaceProtocol = 0,
1813 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1814 /* MT6227 */
1815 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1816 | USB_DEVICE_ID_MATCH_INT_INFO,
1817 .idVendor = 0x0e8d,
1818 .idProduct = 0x0004,
1819 .bInterfaceClass = USB_CLASS_VIDEO,
1820 .bInterfaceSubClass = 1,
1821 .bInterfaceProtocol = 0,
1822 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1823 /* Syntek (HP Spartan) */
1824 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1825 | USB_DEVICE_ID_MATCH_INT_INFO,
1826 .idVendor = 0x174f,
1827 .idProduct = 0x5212,
1828 .bInterfaceClass = USB_CLASS_VIDEO,
1829 .bInterfaceSubClass = 1,
1830 .bInterfaceProtocol = 0,
25e69850 1831 .driver_info = UVC_QUIRK_STREAM_NO_FID },
562f0fed
LP		 1832 /* Syntek (Samsung Q310) */
1833 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1834 | USB_DEVICE_ID_MATCH_INT_INFO,
1835 .idVendor = 0x174f,
1836 .idProduct = 0x5931,
1837 .bInterfaceClass = USB_CLASS_VIDEO,
1838 .bInterfaceSubClass = 1,
1839 .bInterfaceProtocol = 0,
1840 .driver_info = UVC_QUIRK_STREAM_NO_FID },
25e69850
LP		 1841 /* Asus F9SG */
1842 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1843 | USB_DEVICE_ID_MATCH_INT_INFO,
1844 .idVendor = 0x174f,
1845 .idProduct = 0x8a31,
1846 .bInterfaceClass = USB_CLASS_VIDEO,
1847 .bInterfaceSubClass = 1,
1848 .bInterfaceProtocol = 0,
c0efd232
LP		 1849 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1850 /* Syntek (Asus U3S) */
1851 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1852 | USB_DEVICE_ID_MATCH_INT_INFO,
1853 .idVendor = 0x174f,
1854 .idProduct = 0x8a33,
1855 .bInterfaceClass = USB_CLASS_VIDEO,
1856 .bInterfaceSubClass = 1,
1857 .bInterfaceProtocol = 0,
1858 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2f38483b
LP		 1859 /* Lenovo Thinkpad SL500 */
1860 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1861 | USB_DEVICE_ID_MATCH_INT_INFO,
1862 .idVendor = 0x17ef,
1863 .idProduct = 0x480b,
1864 .bInterfaceClass = USB_CLASS_VIDEO,
1865 .bInterfaceSubClass = 1,
1866 .bInterfaceProtocol = 0,
1867 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1868 /* Ecamm Pico iMage */
1869 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1870 | USB_DEVICE_ID_MATCH_INT_INFO,
1871 .idVendor = 0x18cd,
1872 .idProduct = 0xcafe,
1873 .bInterfaceClass = USB_CLASS_VIDEO,
1874 .bInterfaceSubClass = 1,
1875 .bInterfaceProtocol = 0,
1876 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1877 /* Bodelin ProScopeHR */
1878 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1879 | USB_DEVICE_ID_MATCH_DEV_HI
1880 | USB_DEVICE_ID_MATCH_INT_INFO,
1881 .idVendor = 0x19ab,
1882 .idProduct = 0x1000,
1883 .bcdDevice_hi = 0x0126,
1884 .bInterfaceClass = USB_CLASS_VIDEO,
1885 .bInterfaceSubClass = 1,
1886 .bInterfaceProtocol = 0,
1887 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
1888 /* SiGma Micro USB Web Camera */
1889 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1890 | USB_DEVICE_ID_MATCH_INT_INFO,
1891 .idVendor = 0x1c4f,
1892 .idProduct = 0x3000,
1893 .bInterfaceClass = USB_CLASS_VIDEO,
1894 .bInterfaceSubClass = 1,
1895 .bInterfaceProtocol = 0,
1896 .driver_info = UVC_QUIRK_PROBE_MINMAX
2bdd29cf
LP		 1897 | UVC_QUIRK_IGNORE_SELECTOR_UNIT
1898 | UVC_QUIRK_PRUNE_CONTROLS },
c0efd232
LP		 1899 /* Generic USB Video Class */
1900 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
1901 {}
1902};
1903
1904MODULE_DEVICE_TABLE(usb, uvc_ids);
1905
1906struct uvc_driver uvc_driver = {
1907 .driver = {
1908 .name = "uvcvideo",
1909 .probe = uvc_probe,
1910 .disconnect = uvc_disconnect,
1911 .suspend = uvc_suspend,
1912 .resume = uvc_resume,
9b0ae867 1913 .reset_resume = uvc_reset_resume,
c0efd232
LP		 1914 .id_table = uvc_ids,
1915 .supports_autosuspend = 1,
1916 },
1917};
1918
1919static int __init uvc_init(void)
1920{
1921 int result;
1922
1923 INIT_LIST_HEAD(&uvc_driver.devices);
1924 INIT_LIST_HEAD(&uvc_driver.controls);
1925 mutex_init(&uvc_driver.open_mutex);
1926 mutex_init(&uvc_driver.ctrl_mutex);
1927
1928 uvc_ctrl_init();
1929
1930 result = usb_register(&uvc_driver.driver);
1931 if (result == 0)
1932 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
1933 return result;
1934}
1935
1936static void __exit uvc_cleanup(void)
1937{
1938 usb_deregister(&uvc_driver.driver);
1939}
1940
1941module_init(uvc_init);
1942module_exit(uvc_cleanup);
1943
0fbd8ee6
LP		 1944module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
1945MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
c0efd232
LP		 1946module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
1947MODULE_PARM_DESC(quirks, "Forced device quirks");
1948module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
1949MODULE_PARM_DESC(trace, "Trace level bitmask");
1950
1951MODULE_AUTHOR(DRIVER_AUTHOR);
1952MODULE_DESCRIPTION(DRIVER_DESC);
1953MODULE_LICENSE("GPL");
1954MODULE_VERSION(DRIVER_VERSION);
f87086e3 1955
Linux kernel - Deliverables
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