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V4L/DVB (9660): uvcvideo: Fix unaligned memory access.
[GitHub/mt8127/android_kernel_alcatel_ttab.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
47static unsigned int uvc_quirks_param;
48unsigned int uvc_trace_param;
49
50/* ------------------------------------------------------------------------
51 * Control, formats, ...
52 */
53
54static struct uvc_format_desc uvc_fmts[] = {
55 {
56 .name = "YUV 4:2:2 (YUYV)",
57 .guid = UVC_GUID_FORMAT_YUY2,
58 .fcc = V4L2_PIX_FMT_YUYV,
59 },
60 {
61 .name = "YUV 4:2:0 (NV12)",
62 .guid = UVC_GUID_FORMAT_NV12,
63 .fcc = V4L2_PIX_FMT_NV12,
64 },
65 {
66 .name = "MJPEG",
67 .guid = UVC_GUID_FORMAT_MJPEG,
68 .fcc = V4L2_PIX_FMT_MJPEG,
69 },
70 {
71 .name = "YVU 4:2:0 (YV12)",
72 .guid = UVC_GUID_FORMAT_YV12,
73 .fcc = V4L2_PIX_FMT_YVU420,
74 },
75 {
76 .name = "YUV 4:2:0 (I420)",
77 .guid = UVC_GUID_FORMAT_I420,
78 .fcc = V4L2_PIX_FMT_YUV420,
79 },
80 {
81 .name = "YUV 4:2:2 (UYVY)",
82 .guid = UVC_GUID_FORMAT_UYVY,
83 .fcc = V4L2_PIX_FMT_UYVY,
84 },
85 {
86 .name = "Greyscale",
87 .guid = UVC_GUID_FORMAT_Y800,
88 .fcc = V4L2_PIX_FMT_GREY,
89 },
90 {
91 .name = "RGB Bayer",
92 .guid = UVC_GUID_FORMAT_BY8,
93 .fcc = V4L2_PIX_FMT_SBGGR8,
94 },
95};
96
97/* ------------------------------------------------------------------------
98 * Utility functions
99 */
100
101struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
102 __u8 epaddr)
103{
104 struct usb_host_endpoint *ep;
105 unsigned int i;
106
107 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
108 ep = &alts->endpoint[i];
109 if (ep->desc.bEndpointAddress == epaddr)
110 return ep;
111 }
112
113 return NULL;
114}
115
116static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
117{
118 unsigned int len = ARRAY_SIZE(uvc_fmts);
119 unsigned int i;
120
121 for (i = 0; i < len; ++i) {
122 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
123 return &uvc_fmts[i];
124 }
125
126 return NULL;
127}
128
129static __u32 uvc_colorspace(const __u8 primaries)
130{
131 static const __u8 colorprimaries[] = {
132 0,
133 V4L2_COLORSPACE_SRGB,
134 V4L2_COLORSPACE_470_SYSTEM_M,
135 V4L2_COLORSPACE_470_SYSTEM_BG,
136 V4L2_COLORSPACE_SMPTE170M,
137 V4L2_COLORSPACE_SMPTE240M,
138 };
139
140 if (primaries < ARRAY_SIZE(colorprimaries))
141 return colorprimaries[primaries];
142
143 return 0;
144}
145
146/* Simplify a fraction using a simple continued fraction decomposition. The
147 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
148 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
149 * arbitrary parameters to remove non-significative terms from the simple
150 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
151 * respectively seems to give nice results.
152 */
153void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
154 unsigned int n_terms, unsigned int threshold)
155{
156 uint32_t *an;
157 uint32_t x, y, r;
158 unsigned int i, n;
159
160 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
161 if (an == NULL)
162 return;
163
164 /* Convert the fraction to a simple continued fraction. See
165 * http://mathforum.org/dr.math/faq/faq.fractions.html
166 * Stop if the current term is bigger than or equal to the given
167 * threshold.
168 */
169 x = *numerator;
170 y = *denominator;
171
172 for (n = 0; n < n_terms && y != 0; ++n) {
173 an[n] = x / y;
174 if (an[n] >= threshold) {
175 if (n < 2)
176 n++;
177 break;
178 }
179
180 r = x - an[n] * y;
181 x = y;
182 y = r;
183 }
184
185 /* Expand the simple continued fraction back to an integer fraction. */
186 x = 0;
187 y = 1;
188
189 for (i = n; i > 0; --i) {
190 r = y;
191 y = an[i-1] * y + x;
192 x = r;
193 }
194
195 *numerator = y;
196 *denominator = x;
197 kfree(an);
198}
199
200/* Convert a fraction to a frame interval in 100ns multiples. The idea here is
201 * to compute numerator / denominator * 10000000 using 32 bit fixed point
202 * arithmetic only.
203 */
204uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
205{
206 uint32_t multiplier;
207
208 /* Saturate the result if the operation would overflow. */
209 if (denominator == 0 ||
210 numerator/denominator >= ((uint32_t)-1)/10000000)
211 return (uint32_t)-1;
212
213 /* Divide both the denominator and the multiplier by two until
214 * numerator * multiplier doesn't overflow. If anyone knows a better
215 * algorithm please let me know.
216 */
217 multiplier = 10000000;
218 while (numerator > ((uint32_t)-1)/multiplier) {
219 multiplier /= 2;
220 denominator /= 2;
221 }
222
223 return denominator ? numerator * multiplier / denominator : 0;
224}
225
226/* ------------------------------------------------------------------------
227 * Terminal and unit management
228 */
229
230static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
231{
232 struct uvc_entity *entity;
233
234 list_for_each_entry(entity, &dev->entities, list) {
235 if (entity->id == id)
236 return entity;
237 }
238
239 return NULL;
240}
241
242static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
243 int id, struct uvc_entity *entity)
244{
245 unsigned int i;
246
247 if (entity == NULL)
248 entity = list_entry(&dev->entities, struct uvc_entity, list);
249
250 list_for_each_entry_continue(entity, &dev->entities, list) {
251 switch (UVC_ENTITY_TYPE(entity)) {
252 case TT_STREAMING:
253 if (entity->output.bSourceID == id)
254 return entity;
255 break;
256
257 case VC_PROCESSING_UNIT:
258 if (entity->processing.bSourceID == id)
259 return entity;
260 break;
261
262 case VC_SELECTOR_UNIT:
263 for (i = 0; i < entity->selector.bNrInPins; ++i)
264 if (entity->selector.baSourceID[i] == id)
265 return entity;
266 break;
267
268 case VC_EXTENSION_UNIT:
269 for (i = 0; i < entity->extension.bNrInPins; ++i)
270 if (entity->extension.baSourceID[i] == id)
271 return entity;
272 break;
273 }
274 }
275
276 return NULL;
277}
278
279/* ------------------------------------------------------------------------
280 * Descriptors handling
281 */
282
283static int uvc_parse_format(struct uvc_device *dev,
284 struct uvc_streaming *streaming, struct uvc_format *format,
285 __u32 **intervals, unsigned char *buffer, int buflen)
286{
287 struct usb_interface *intf = streaming->intf;
288 struct usb_host_interface *alts = intf->cur_altsetting;
289 struct uvc_format_desc *fmtdesc;
290 struct uvc_frame *frame;
291 const unsigned char *start = buffer;
c9535db3 292 unsigned char *_buffer;
c0efd232
LP		 293 unsigned int interval;
294 unsigned int i, n;
c9535db3 295 int _buflen;
c0efd232
LP		 296 __u8 ftype;
297
298 format->type = buffer[2];
299 format->index = buffer[3];
300
301 switch (buffer[2]) {
302 case VS_FORMAT_UNCOMPRESSED:
303 case VS_FORMAT_FRAME_BASED:
233548a2
LP		 304 n = buffer[2] == VS_FORMAT_UNCOMPRESSED ? 27 : 28;
305 if (buflen < n) {
c0efd232
LP		 306 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
307 "interface %d FORMAT error\n",
308 dev->udev->devnum,
309 alts->desc.bInterfaceNumber);
310 return -EINVAL;
311 }
312
313 /* Find the format descriptor from its GUID. */
314 fmtdesc = uvc_format_by_guid(&buffer[5]);
315
316 if (fmtdesc != NULL) {
317 strncpy(format->name, fmtdesc->name,
318 sizeof format->name);
319 format->fcc = fmtdesc->fcc;
320 } else {
321 uvc_printk(KERN_INFO, "Unknown video format "
322 UVC_GUID_FORMAT "\n",
323 UVC_GUID_ARGS(&buffer[5]));
324 snprintf(format->name, sizeof format->name,
325 UVC_GUID_FORMAT, UVC_GUID_ARGS(&buffer[5]));
326 format->fcc = 0;
327 }
328
329 format->bpp = buffer[21];
330 if (buffer[2] == VS_FORMAT_UNCOMPRESSED) {
331 ftype = VS_FRAME_UNCOMPRESSED;
332 } else {
333 ftype = VS_FRAME_FRAME_BASED;
334 if (buffer[27])
335 format->flags = UVC_FMT_FLAG_COMPRESSED;
336 }
337 break;
338
339 case VS_FORMAT_MJPEG:
340 if (buflen < 11) {
341 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
342 "interface %d FORMAT error\n",
343 dev->udev->devnum,
344 alts->desc.bInterfaceNumber);
345 return -EINVAL;
346 }
347
348 strncpy(format->name, "MJPEG", sizeof format->name);
349 format->fcc = V4L2_PIX_FMT_MJPEG;
350 format->flags = UVC_FMT_FLAG_COMPRESSED;
351 format->bpp = 0;
352 ftype = VS_FRAME_MJPEG;
353 break;
354
355 case VS_FORMAT_DV:
356 if (buflen < 9) {
357 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
358 "interface %d FORMAT error\n",
359 dev->udev->devnum,
360 alts->desc.bInterfaceNumber);
361 return -EINVAL;
362 }
363
364 switch (buffer[8] & 0x7f) {
365 case 0:
366 strncpy(format->name, "SD-DV", sizeof format->name);
367 break;
368 case 1:
369 strncpy(format->name, "SDL-DV", sizeof format->name);
370 break;
371 case 2:
372 strncpy(format->name, "HD-DV", sizeof format->name);
373 break;
374 default:
375 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
376 "interface %d: unknown DV format %u\n",
377 dev->udev->devnum,
378 alts->desc.bInterfaceNumber, buffer[8]);
379 return -EINVAL;
380 }
381
382 strncat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
383 sizeof format->name);
384
385 format->fcc = V4L2_PIX_FMT_DV;
386 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
387 format->bpp = 0;
388 ftype = 0;
389
390 /* Create a dummy frame descriptor. */
391 frame = &format->frame[0];
392 memset(&format->frame[0], 0, sizeof format->frame[0]);
393 frame->bFrameIntervalType = 1;
394 frame->dwDefaultFrameInterval = 1;
395 frame->dwFrameInterval = *intervals;
396 *(*intervals)++ = 1;
397 format->nframes = 1;
398 break;
399
400 case VS_FORMAT_MPEG2TS:
401 case VS_FORMAT_STREAM_BASED:
402 /* Not supported yet. */
403 default:
404 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
405 "interface %d unsupported format %u\n",
406 dev->udev->devnum, alts->desc.bInterfaceNumber,
407 buffer[2]);
408 return -EINVAL;
409 }
410
411 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
412
413 buflen -= buffer[0];
414 buffer += buffer[0];
415
c9535db3
LP		 416 /* Count the number of frame descriptors to test the bFrameIndex
417 * field when parsing the descriptors. We can't rely on the
418 * bNumFrameDescriptors field as some cameras don't initialize it
419 * properly.
420 */
421 for (_buflen = buflen, _buffer = buffer;
422 _buflen > 2 && _buffer[2] == ftype;
423 _buflen -= _buffer[0], _buffer += _buffer[0])
424 format->nframes++;
425
c0efd232
LP		 426 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
427 * based formats have frame descriptors.
428 */
429 while (buflen > 2 && buffer[2] == ftype) {
c0efd232
LP		 430 if (ftype != VS_FRAME_FRAME_BASED)
431 n = buflen > 25 ? buffer[25] : 0;
432 else
433 n = buflen > 21 ? buffer[21] : 0;
434
435 n = n ? n : 3;
436
437 if (buflen < 26 + 4*n) {
438 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
439 "interface %d FRAME error\n", dev->udev->devnum,
440 alts->desc.bInterfaceNumber);
441 return -EINVAL;
442 }
443
c9535db3
LP		 444 if (buffer[3] - 1 >= format->nframes) {
445 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
446 "interface %d frame index %u out of range\n",
447 dev->udev->devnum, alts->desc.bInterfaceNumber,
448 buffer[3]);
449 return -EINVAL;
450 }
451
452 frame = &format->frame[buffer[3] - 1];
453
c0efd232
LP		 454 frame->bFrameIndex = buffer[3];
455 frame->bmCapabilities = buffer[4];
9bc6218d
MH		 456 frame->wWidth = get_unaligned_le16(&buffer[5]);
457 frame->wHeight = get_unaligned_le16(&buffer[7]);
458 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
459 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
c0efd232
LP		 460 if (ftype != VS_FRAME_FRAME_BASED) {
461 frame->dwMaxVideoFrameBufferSize =
9bc6218d 462 get_unaligned_le32(&buffer[17]);
c0efd232 463 frame->dwDefaultFrameInterval =
9bc6218d 464 get_unaligned_le32(&buffer[21]);
c0efd232
LP		 465 frame->bFrameIntervalType = buffer[25];
466 } else {
467 frame->dwMaxVideoFrameBufferSize = 0;
468 frame->dwDefaultFrameInterval =
9bc6218d 469 get_unaligned_le32(&buffer[17]);
c0efd232
LP		 470 frame->bFrameIntervalType = buffer[21];
471 }
472 frame->dwFrameInterval = *intervals;
473
474 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
475 * completely. Observed behaviours range from setting the
476 * value to 1.1x the actual frame size of hardwiring the
477 * 16 low bits to 0. This results in a higher than necessary
478 * memory usage as well as a wrong image size information. For
479 * uncompressed formats this can be fixed by computing the
480 * value from the frame size.
481 */
482 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
483 frame->dwMaxVideoFrameBufferSize = format->bpp
484 * frame->wWidth * frame->wHeight / 8;
485
486 /* Some bogus devices report dwMinFrameInterval equal to
487 * dwMaxFrameInterval and have dwFrameIntervalStep set to
488 * zero. Setting all null intervals to 1 fixes the problem and
489 * some other divisions by zero which could happen.
490 */
491 for (i = 0; i < n; ++i) {
9bc6218d 492 interval = get_unaligned_le32(&buffer[26+4*i]);
c0efd232
LP		 493 *(*intervals)++ = interval ? interval : 1;
494 }
495
496 /* Make sure that the default frame interval stays between
497 * the boundaries.
498 */
499 n -= frame->bFrameIntervalType ? 1 : 2;
500 frame->dwDefaultFrameInterval =
501 min(frame->dwFrameInterval[n],
502 max(frame->dwFrameInterval[0],
503 frame->dwDefaultFrameInterval));
504
505 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
506 frame->wWidth, frame->wHeight,
507 10000000/frame->dwDefaultFrameInterval,
508 (100000000/frame->dwDefaultFrameInterval)%10);
509
c0efd232
LP		 510 buflen -= buffer[0];
511 buffer += buffer[0];
512 }
513
514 if (buflen > 2 && buffer[2] == VS_STILL_IMAGE_FRAME) {
515 buflen -= buffer[0];
516 buffer += buffer[0];
517 }
518
519 if (buflen > 2 && buffer[2] == VS_COLORFORMAT) {
520 if (buflen < 6) {
521 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
522 "interface %d COLORFORMAT error\n",
523 dev->udev->devnum,
524 alts->desc.bInterfaceNumber);
525 return -EINVAL;
526 }
527
528 format->colorspace = uvc_colorspace(buffer[3]);
529
530 buflen -= buffer[0];
531 buffer += buffer[0];
532 }
533
534 return buffer - start;
535}
536
537static int uvc_parse_streaming(struct uvc_device *dev,
538 struct usb_interface *intf)
539{
540 struct uvc_streaming *streaming = NULL;
541 struct uvc_format *format;
542 struct uvc_frame *frame;
543 struct usb_host_interface *alts = &intf->altsetting[0];
544 unsigned char *_buffer, *buffer = alts->extra;
545 int _buflen, buflen = alts->extralen;
546 unsigned int nformats = 0, nframes = 0, nintervals = 0;
547 unsigned int size, i, n, p;
548 __u32 *interval;
549 __u16 psize;
550 int ret = -EINVAL;
551
552 if (intf->cur_altsetting->desc.bInterfaceSubClass
553 != SC_VIDEOSTREAMING) {
554 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
555 "video streaming interface\n", dev->udev->devnum,
556 intf->altsetting[0].desc.bInterfaceNumber);
557 return -EINVAL;
558 }
559
560 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
561 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
562 "claimed\n", dev->udev->devnum,
563 intf->altsetting[0].desc.bInterfaceNumber);
564 return -EINVAL;
565 }
566
567 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
568 if (streaming == NULL) {
569 usb_driver_release_interface(&uvc_driver.driver, intf);
570 return -EINVAL;
571 }
572
573 mutex_init(&streaming->mutex);
574 streaming->intf = usb_get_intf(intf);
575 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
576
577 /* The Pico iMage webcam has its class-specific interface descriptors
578 * after the endpoint descriptors.
579 */
580 if (buflen == 0) {
581 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
582 struct usb_host_endpoint *ep = &alts->endpoint[i];
583
584 if (ep->extralen == 0)
585 continue;
586
587 if (ep->extralen > 2 &&
588 ep->extra[1] == USB_DT_CS_INTERFACE) {
589 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
590 "from endpoint %u.\n", i);
591 buffer = alts->endpoint[i].extra;
592 buflen = alts->endpoint[i].extralen;
593 break;
594 }
595 }
596 }
597
598 /* Skip the standard interface descriptors. */
599 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
600 buflen -= buffer[0];
601 buffer += buffer[0];
602 }
603
604 if (buflen <= 2) {
605 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
606 "interface descriptors found.\n");
607 goto error;
608 }
609
610 /* Parse the header descriptor. */
611 if (buffer[2] == VS_OUTPUT_HEADER) {
612 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
613 "%d OUTPUT HEADER descriptor is not supported.\n",
614 dev->udev->devnum, alts->desc.bInterfaceNumber);
615 goto error;
616 } else if (buffer[2] == VS_INPUT_HEADER) {
617 p = buflen >= 5 ? buffer[3] : 0;
618 n = buflen >= 12 ? buffer[12] : 0;
619
620 if (buflen < 13 + p*n || buffer[2] != VS_INPUT_HEADER) {
621 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
622 "interface %d INPUT HEADER descriptor is "
623 "invalid.\n", dev->udev->devnum,
624 alts->desc.bInterfaceNumber);
625 goto error;
626 }
627
628 streaming->header.bNumFormats = p;
629 streaming->header.bEndpointAddress = buffer[6];
630 streaming->header.bmInfo = buffer[7];
631 streaming->header.bTerminalLink = buffer[8];
632 streaming->header.bStillCaptureMethod = buffer[9];
633 streaming->header.bTriggerSupport = buffer[10];
634 streaming->header.bTriggerUsage = buffer[11];
635 streaming->header.bControlSize = n;
636
637 streaming->header.bmaControls = kmalloc(p*n, GFP_KERNEL);
638 if (streaming->header.bmaControls == NULL) {
639 ret = -ENOMEM;
640 goto error;
641 }
642
643 memcpy(streaming->header.bmaControls, &buffer[13], p*n);
644 } else {
645 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
646 "%d HEADER descriptor not found.\n", dev->udev->devnum,
647 alts->desc.bInterfaceNumber);
648 goto error;
649 }
650
651 buflen -= buffer[0];
652 buffer += buffer[0];
653
654 _buffer = buffer;
655 _buflen = buflen;
656
657 /* Count the format and frame descriptors. */
658 while (_buflen > 2) {
659 switch (_buffer[2]) {
660 case VS_FORMAT_UNCOMPRESSED:
661 case VS_FORMAT_MJPEG:
662 case VS_FORMAT_FRAME_BASED:
663 nformats++;
664 break;
665
666 case VS_FORMAT_DV:
667 /* DV format has no frame descriptor. We will create a
668 * dummy frame descriptor with a dummy frame interval.
669 */
670 nformats++;
671 nframes++;
672 nintervals++;
673 break;
674
675 case VS_FORMAT_MPEG2TS:
676 case VS_FORMAT_STREAM_BASED:
677 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
678 "interface %d FORMAT %u is not supported.\n",
679 dev->udev->devnum,
680 alts->desc.bInterfaceNumber, _buffer[2]);
681 break;
682
683 case VS_FRAME_UNCOMPRESSED:
684 case VS_FRAME_MJPEG:
685 nframes++;
686 if (_buflen > 25)
687 nintervals += _buffer[25] ? _buffer[25] : 3;
688 break;
689
690 case VS_FRAME_FRAME_BASED:
691 nframes++;
692 if (_buflen > 21)
693 nintervals += _buffer[21] ? _buffer[21] : 3;
694 break;
695 }
696
697 _buflen -= _buffer[0];
698 _buffer += _buffer[0];
699 }
700
701 if (nformats == 0) {
702 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
703 "%d has no supported formats defined.\n",
704 dev->udev->devnum, alts->desc.bInterfaceNumber);
705 goto error;
706 }
707
708 size = nformats * sizeof *format + nframes * sizeof *frame
709 + nintervals * sizeof *interval;
710 format = kzalloc(size, GFP_KERNEL);
711 if (format == NULL) {
712 ret = -ENOMEM;
713 goto error;
714 }
715
716 frame = (struct uvc_frame *)&format[nformats];
717 interval = (__u32 *)&frame[nframes];
718
719 streaming->format = format;
720 streaming->nformats = nformats;
721
722 /* Parse the format descriptors. */
723 while (buflen > 2) {
724 switch (buffer[2]) {
725 case VS_FORMAT_UNCOMPRESSED:
726 case VS_FORMAT_MJPEG:
727 case VS_FORMAT_DV:
728 case VS_FORMAT_FRAME_BASED:
729 format->frame = frame;
730 ret = uvc_parse_format(dev, streaming, format,
731 &interval, buffer, buflen);
732 if (ret < 0)
733 goto error;
734
735 frame += format->nframes;
736 format++;
737
738 buflen -= ret;
739 buffer += ret;
740 continue;
741
742 default:
743 break;
744 }
745
746 buflen -= buffer[0];
747 buffer += buffer[0];
748 }
749
750 /* Parse the alternate settings to find the maximum bandwidth. */
751 for (i = 0; i < intf->num_altsetting; ++i) {
752 struct usb_host_endpoint *ep;
753 alts = &intf->altsetting[i];
754 ep = uvc_find_endpoint(alts,
755 streaming->header.bEndpointAddress);
756 if (ep == NULL)
757 continue;
758
759 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
760 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
761 if (psize > streaming->maxpsize)
762 streaming->maxpsize = psize;
763 }
764
765 list_add_tail(&streaming->list, &dev->streaming);
766 return 0;
767
768error:
769 usb_driver_release_interface(&uvc_driver.driver, intf);
770 usb_put_intf(intf);
771 kfree(streaming->format);
772 kfree(streaming->header.bmaControls);
773 kfree(streaming);
774 return ret;
775}
776
777/* Parse vendor-specific extensions. */
778static int uvc_parse_vendor_control(struct uvc_device *dev,
779 const unsigned char *buffer, int buflen)
780{
781 struct usb_device *udev = dev->udev;
782 struct usb_host_interface *alts = dev->intf->cur_altsetting;
783 struct uvc_entity *unit;
784 unsigned int n, p;
785 int handled = 0;
786
787 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
788 case 0x046d: /* Logitech */
789 if (buffer[1] != 0x41 || buffer[2] != 0x01)
790 break;
791
792 /* Logitech implements several vendor specific functions
793 * through vendor specific extension units (LXU).
794 *
795 * The LXU descriptors are similar to XU descriptors
796 * (see "USB Device Video Class for Video Devices", section
797 * 3.7.2.6 "Extension Unit Descriptor") with the following
798 * differences:
799 *
800 * ----------------------------------------------------------
801 * 0 bLength 1 Number
802 * Size of this descriptor, in bytes: 24+p+n*2
803 * ----------------------------------------------------------
804 * 23+p+n bmControlsType N Bitmap
805 * Individual bits in the set are defined:
806 * 0: Absolute
807 * 1: Relative
808 *
809 * This bitset is mapped exactly the same as bmControls.
810 * ----------------------------------------------------------
811 * 23+p+n*2 bReserved 1 Boolean
812 * ----------------------------------------------------------
813 * 24+p+n*2 iExtension 1 Index
814 * Index of a string descriptor that describes this
815 * extension unit.
816 * ----------------------------------------------------------
817 */
818 p = buflen >= 22 ? buffer[21] : 0;
819 n = buflen >= 25 + p ? buffer[22+p] : 0;
820
821 if (buflen < 25 + p + 2*n) {
822 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
823 "interface %d EXTENSION_UNIT error\n",
824 udev->devnum, alts->desc.bInterfaceNumber);
825 break;
826 }
827
828 unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL);
829 if (unit == NULL)
830 return -ENOMEM;
831
832 unit->id = buffer[3];
833 unit->type = VC_EXTENSION_UNIT;
834 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
835 unit->extension.bNumControls = buffer[20];
9bc6218d 836 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
c0efd232
LP		 837 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
838 memcpy(unit->extension.baSourceID, &buffer[22], p);
839 unit->extension.bControlSize = buffer[22+p];
840 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
841 unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit
842 + p + n;
843 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
844
845 if (buffer[24+p+2*n] != 0)
846 usb_string(udev, buffer[24+p+2*n], unit->name,
847 sizeof unit->name);
848 else
849 sprintf(unit->name, "Extension %u", buffer[3]);
850
851 list_add_tail(&unit->list, &dev->entities);
852 handled = 1;
853 break;
854 }
855
856 return handled;
857}
858
859static int uvc_parse_standard_control(struct uvc_device *dev,
860 const unsigned char *buffer, int buflen)
861{
862 struct usb_device *udev = dev->udev;
863 struct uvc_entity *unit, *term;
864 struct usb_interface *intf;
865 struct usb_host_interface *alts = dev->intf->cur_altsetting;
866 unsigned int i, n, p, len;
867 __u16 type;
868
869 switch (buffer[2]) {
870 case VC_HEADER:
871 n = buflen >= 12 ? buffer[11] : 0;
872
873 if (buflen < 12 || buflen < 12 + n) {
874 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
875 "interface %d HEADER error\n", udev->devnum,
876 alts->desc.bInterfaceNumber);
877 return -EINVAL;
878 }
879
9bc6218d
MH		 880 dev->uvc_version = get_unaligned_le16(&buffer[3]);
881 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
c0efd232
LP		 882
883 /* Parse all USB Video Streaming interfaces. */
884 for (i = 0; i < n; ++i) {
885 intf = usb_ifnum_to_if(udev, buffer[12+i]);
886 if (intf == NULL) {
887 uvc_trace(UVC_TRACE_DESCR, "device %d "
888 "interface %d doesn't exists\n",
889 udev->devnum, i);
890 continue;
891 }
892
893 uvc_parse_streaming(dev, intf);
894 }
895 break;
896
897 case VC_INPUT_TERMINAL:
898 if (buflen < 8) {
899 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
900 "interface %d INPUT_TERMINAL error\n",
901 udev->devnum, alts->desc.bInterfaceNumber);
902 return -EINVAL;
903 }
904
905 /* Make sure the terminal type MSB is not null, otherwise it
906 * could be confused with a unit.
907 */
9bc6218d 908 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 909 if ((type & 0xff00) == 0) {
910 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
911 "interface %d INPUT_TERMINAL %d has invalid "
912 "type 0x%04x, skipping\n", udev->devnum,
913 alts->desc.bInterfaceNumber,
914 buffer[3], type);
915 return 0;
916 }
917
918 n = 0;
919 p = 0;
920 len = 8;
921
922 if (type == ITT_CAMERA) {
923 n = buflen >= 15 ? buffer[14] : 0;
924 len = 15;
925
926 } else if (type == ITT_MEDIA_TRANSPORT_INPUT) {
927 n = buflen >= 9 ? buffer[8] : 0;
928 p = buflen >= 10 + n ? buffer[9+n] : 0;
929 len = 10;
930 }
931
932 if (buflen < len + n + p) {
933 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
934 "interface %d INPUT_TERMINAL error\n",
935 udev->devnum, alts->desc.bInterfaceNumber);
936 return -EINVAL;
937 }
938
939 term = kzalloc(sizeof *term + n + p, GFP_KERNEL);
940 if (term == NULL)
941 return -ENOMEM;
942
943 term->id = buffer[3];
944 term->type = type | UVC_TERM_INPUT;
945
946 if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) {
947 term->camera.bControlSize = n;
948 term->camera.bmControls = (__u8 *)term + sizeof *term;
949 term->camera.wObjectiveFocalLengthMin =
9bc6218d 950 get_unaligned_le16(&buffer[8]);
c0efd232 951 term->camera.wObjectiveFocalLengthMax =
9bc6218d 952 get_unaligned_le16(&buffer[10]);
c0efd232 953 term->camera.wOcularFocalLength =
9bc6218d 954 get_unaligned_le16(&buffer[12]);
c0efd232
LP		 955 memcpy(term->camera.bmControls, &buffer[15], n);
956 } else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) {
957 term->media.bControlSize = n;
958 term->media.bmControls = (__u8 *)term + sizeof *term;
959 term->media.bTransportModeSize = p;
960 term->media.bmTransportModes = (__u8 *)term
961 + sizeof *term + n;
962 memcpy(term->media.bmControls, &buffer[9], n);
963 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
964 }
965
966 if (buffer[7] != 0)
967 usb_string(udev, buffer[7], term->name,
968 sizeof term->name);
969 else if (UVC_ENTITY_TYPE(term) == ITT_CAMERA)
970 sprintf(term->name, "Camera %u", buffer[3]);
971 else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT)
972 sprintf(term->name, "Media %u", buffer[3]);
973 else
974 sprintf(term->name, "Input %u", buffer[3]);
975
976 list_add_tail(&term->list, &dev->entities);
977 break;
978
979 case VC_OUTPUT_TERMINAL:
980 if (buflen < 9) {
981 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
982 "interface %d OUTPUT_TERMINAL error\n",
983 udev->devnum, alts->desc.bInterfaceNumber);
984 return -EINVAL;
985 }
986
987 /* Make sure the terminal type MSB is not null, otherwise it
988 * could be confused with a unit.
989 */
9bc6218d 990 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 991 if ((type & 0xff00) == 0) {
992 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
993 "interface %d OUTPUT_TERMINAL %d has invalid "
994 "type 0x%04x, skipping\n", udev->devnum,
995 alts->desc.bInterfaceNumber, buffer[3], type);
996 return 0;
997 }
998
999 term = kzalloc(sizeof *term, GFP_KERNEL);
1000 if (term == NULL)
1001 return -ENOMEM;
1002
1003 term->id = buffer[3];
1004 term->type = type | UVC_TERM_OUTPUT;
1005 term->output.bSourceID = buffer[7];
1006
1007 if (buffer[8] != 0)
1008 usb_string(udev, buffer[8], term->name,
1009 sizeof term->name);
1010 else
1011 sprintf(term->name, "Output %u", buffer[3]);
1012
1013 list_add_tail(&term->list, &dev->entities);
1014 break;
1015
1016 case VC_SELECTOR_UNIT:
1017 p = buflen >= 5 ? buffer[4] : 0;
1018
1019 if (buflen < 5 || buflen < 6 + p) {
1020 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1021 "interface %d SELECTOR_UNIT error\n",
1022 udev->devnum, alts->desc.bInterfaceNumber);
1023 return -EINVAL;
1024 }
1025
1026 unit = kzalloc(sizeof *unit + p, GFP_KERNEL);
1027 if (unit == NULL)
1028 return -ENOMEM;
1029
1030 unit->id = buffer[3];
1031 unit->type = buffer[2];
1032 unit->selector.bNrInPins = buffer[4];
1033 unit->selector.baSourceID = (__u8 *)unit + sizeof *unit;
1034 memcpy(unit->selector.baSourceID, &buffer[5], p);
1035
1036 if (buffer[5+p] != 0)
1037 usb_string(udev, buffer[5+p], unit->name,
1038 sizeof unit->name);
1039 else
1040 sprintf(unit->name, "Selector %u", buffer[3]);
1041
1042 list_add_tail(&unit->list, &dev->entities);
1043 break;
1044
1045 case VC_PROCESSING_UNIT:
1046 n = buflen >= 8 ? buffer[7] : 0;
1047 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1048
1049 if (buflen < p + n) {
1050 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1051 "interface %d PROCESSING_UNIT error\n",
1052 udev->devnum, alts->desc.bInterfaceNumber);
1053 return -EINVAL;
1054 }
1055
1056 unit = kzalloc(sizeof *unit + n, GFP_KERNEL);
1057 if (unit == NULL)
1058 return -ENOMEM;
1059
1060 unit->id = buffer[3];
1061 unit->type = buffer[2];
1062 unit->processing.bSourceID = buffer[4];
1063 unit->processing.wMaxMultiplier =
9bc6218d 1064 get_unaligned_le16(&buffer[5]);
c0efd232
LP		 1065 unit->processing.bControlSize = buffer[7];
1066 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1067 memcpy(unit->processing.bmControls, &buffer[8], n);
1068 if (dev->uvc_version >= 0x0110)
1069 unit->processing.bmVideoStandards = buffer[9+n];
1070
1071 if (buffer[8+n] != 0)
1072 usb_string(udev, buffer[8+n], unit->name,
1073 sizeof unit->name);
1074 else
1075 sprintf(unit->name, "Processing %u", buffer[3]);
1076
1077 list_add_tail(&unit->list, &dev->entities);
1078 break;
1079
1080 case VC_EXTENSION_UNIT:
1081 p = buflen >= 22 ? buffer[21] : 0;
1082 n = buflen >= 24 + p ? buffer[22+p] : 0;
1083
1084 if (buflen < 24 + p + n) {
1085 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1086 "interface %d EXTENSION_UNIT error\n",
1087 udev->devnum, alts->desc.bInterfaceNumber);
1088 return -EINVAL;
1089 }
1090
1091 unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL);
1092 if (unit == NULL)
1093 return -ENOMEM;
1094
1095 unit->id = buffer[3];
1096 unit->type = buffer[2];
1097 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1098 unit->extension.bNumControls = buffer[20];
9bc6218d 1099 unit->extension.bNrInPins = get_unaligned_le16(&buffer[21]);
c0efd232
LP		 1100 unit->extension.baSourceID = (__u8 *)unit + sizeof *unit;
1101 memcpy(unit->extension.baSourceID, &buffer[22], p);
1102 unit->extension.bControlSize = buffer[22+p];
1103 unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p;
1104 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1105
1106 if (buffer[23+p+n] != 0)
1107 usb_string(udev, buffer[23+p+n], unit->name,
1108 sizeof unit->name);
1109 else
1110 sprintf(unit->name, "Extension %u", buffer[3]);
1111
1112 list_add_tail(&unit->list, &dev->entities);
1113 break;
1114
1115 default:
1116 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1117 "descriptor (%u)\n", buffer[2]);
1118 break;
1119 }
1120
1121 return 0;
1122}
1123
1124static int uvc_parse_control(struct uvc_device *dev)
1125{
1126 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1127 unsigned char *buffer = alts->extra;
1128 int buflen = alts->extralen;
1129 int ret;
1130
1131 /* Parse the default alternate setting only, as the UVC specification
1132 * defines a single alternate setting, the default alternate setting
1133 * zero.
1134 */
1135
1136 while (buflen > 2) {
1137 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1138 buffer[1] != USB_DT_CS_INTERFACE)
1139 goto next_descriptor;
1140
1141 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1142 return ret;
1143
1144next_descriptor:
1145 buflen -= buffer[0];
1146 buffer += buffer[0];
1147 }
1148
1149 /* Check if the optional status endpoint is present. */
1150 if (alts->desc.bNumEndpoints == 1) {
1151 struct usb_host_endpoint *ep = &alts->endpoint[0];
1152 struct usb_endpoint_descriptor *desc = &ep->desc;
1153
1154 if (usb_endpoint_is_int_in(desc) &&
1155 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1156 desc->bInterval != 0) {
1157 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1158 "(addr %02x).\n", desc->bEndpointAddress);
1159 dev->int_ep = ep;
1160 }
1161 }
1162
1163 return 0;
1164}
1165
1166/* ------------------------------------------------------------------------
1167 * USB probe and disconnect
1168 */
1169
1170/*
1171 * Unregister the video devices.
1172 */
1173static void uvc_unregister_video(struct uvc_device *dev)
1174{
1175 if (dev->video.vdev) {
1176 if (dev->video.vdev->minor == -1)
1177 video_device_release(dev->video.vdev);
1178 else
1179 video_unregister_device(dev->video.vdev);
1180 dev->video.vdev = NULL;
1181 }
1182}
1183
1184/*
1185 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1186 * and containing the following units:
1187 *
1188 * - a USB Streaming Output Terminal
1189 * - zero or one Processing Unit
1190 * - zero, one or mode single-input Selector Units
1191 * - zero or one multiple-input Selector Units, provided all inputs are
1192 * connected to input terminals
1193 * - zero, one or mode single-input Extension Units
1194 * - one Camera Input Terminal, or one or more External terminals.
1195 *
1196 * A side forward scan is made on each detected entity to check for additional
1197 * extension units.
1198 */
1199static int uvc_scan_chain_entity(struct uvc_video_device *video,
1200 struct uvc_entity *entity)
1201{
1202 switch (UVC_ENTITY_TYPE(entity)) {
1203 case VC_EXTENSION_UNIT:
1204 if (uvc_trace_param & UVC_TRACE_PROBE)
1205 printk(" <- XU %d", entity->id);
1206
1207 if (entity->extension.bNrInPins != 1) {
1208 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1209 "than 1 input pin.\n", entity->id);
1210 return -1;
1211 }
1212
1213 list_add_tail(&entity->chain, &video->extensions);
1214 break;
1215
1216 case VC_PROCESSING_UNIT:
1217 if (uvc_trace_param & UVC_TRACE_PROBE)
1218 printk(" <- PU %d", entity->id);
1219
1220 if (video->processing != NULL) {
1221 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1222 "Processing Units in chain.\n");
1223 return -1;
1224 }
1225
1226 video->processing = entity;
1227 break;
1228
1229 case VC_SELECTOR_UNIT:
1230 if (uvc_trace_param & UVC_TRACE_PROBE)
1231 printk(" <- SU %d", entity->id);
1232
1233 /* Single-input selector units are ignored. */
1234 if (entity->selector.bNrInPins == 1)
1235 break;
1236
1237 if (video->selector != NULL) {
1238 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1239 "Units in chain.\n");
1240 return -1;
1241 }
1242
1243 video->selector = entity;
1244 break;
1245
1246 case ITT_VENDOR_SPECIFIC:
1247 case ITT_CAMERA:
1248 case ITT_MEDIA_TRANSPORT_INPUT:
1249 if (uvc_trace_param & UVC_TRACE_PROBE)
1250 printk(" <- IT %d\n", entity->id);
1251
1252 list_add_tail(&entity->chain, &video->iterms);
1253 break;
1254
1255 default:
1256 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1257 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1258 return -1;
1259 }
1260
1261 return 0;
1262}
1263
1264static int uvc_scan_chain_forward(struct uvc_video_device *video,
1265 struct uvc_entity *entity, struct uvc_entity *prev)
1266{
1267 struct uvc_entity *forward;
1268 int found;
1269
1270 /* Forward scan */
1271 forward = NULL;
1272 found = 0;
1273
1274 while (1) {
1275 forward = uvc_entity_by_reference(video->dev, entity->id,
1276 forward);
1277 if (forward == NULL)
1278 break;
1279
1280 if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT ||
1281 forward == prev)
1282 continue;
1283
1284 if (forward->extension.bNrInPins != 1) {
1285 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has"
1286 "more than 1 input pin.\n", entity->id);
1287 return -1;
1288 }
1289
1290 list_add_tail(&forward->chain, &video->extensions);
1291 if (uvc_trace_param & UVC_TRACE_PROBE) {
1292 if (!found)
1293 printk(" (-> XU");
1294
1295 printk(" %d", forward->id);
1296 found = 1;
1297 }
1298 }
1299 if (found)
1300 printk(")");
1301
1302 return 0;
1303}
1304
1305static int uvc_scan_chain_backward(struct uvc_video_device *video,
1306 struct uvc_entity *entity)
1307{
1308 struct uvc_entity *term;
1309 int id = -1, i;
1310
1311 switch (UVC_ENTITY_TYPE(entity)) {
1312 case VC_EXTENSION_UNIT:
1313 id = entity->extension.baSourceID[0];
1314 break;
1315
1316 case VC_PROCESSING_UNIT:
1317 id = entity->processing.bSourceID;
1318 break;
1319
1320 case VC_SELECTOR_UNIT:
1321 /* Single-input selector units are ignored. */
1322 if (entity->selector.bNrInPins == 1) {
1323 id = entity->selector.baSourceID[0];
1324 break;
1325 }
1326
1327 if (uvc_trace_param & UVC_TRACE_PROBE)
1328 printk(" <- IT");
1329
1330 video->selector = entity;
1331 for (i = 0; i < entity->selector.bNrInPins; ++i) {
1332 id = entity->selector.baSourceID[i];
1333 term = uvc_entity_by_id(video->dev, id);
1334 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1335 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1336 "input %d isn't connected to an "
1337 "input terminal\n", entity->id, i);
1338 return -1;
1339 }
1340
1341 if (uvc_trace_param & UVC_TRACE_PROBE)
1342 printk(" %d", term->id);
1343
1344 list_add_tail(&term->chain, &video->iterms);
1345 uvc_scan_chain_forward(video, term, entity);
1346 }
1347
1348 if (uvc_trace_param & UVC_TRACE_PROBE)
1349 printk("\n");
1350
1351 id = 0;
1352 break;
1353 }
1354
1355 return id;
1356}
1357
1358static int uvc_scan_chain(struct uvc_video_device *video)
1359{
1360 struct uvc_entity *entity, *prev;
1361 int id;
1362
1363 entity = video->oterm;
1364 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id);
1365 id = entity->output.bSourceID;
1366 while (id != 0) {
1367 prev = entity;
1368 entity = uvc_entity_by_id(video->dev, id);
1369 if (entity == NULL) {
1370 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1371 "unknown entity %d.\n", id);
1372 return -1;
1373 }
1374
1375 /* Process entity */
1376 if (uvc_scan_chain_entity(video, entity) < 0)
1377 return -1;
1378
1379 /* Forward scan */
1380 if (uvc_scan_chain_forward(video, entity, prev) < 0)
1381 return -1;
1382
1383 /* Stop when a terminal is found. */
1384 if (!UVC_ENTITY_IS_UNIT(entity))
1385 break;
1386
1387 /* Backward scan */
1388 id = uvc_scan_chain_backward(video, entity);
1389 if (id < 0)
1390 return id;
1391 }
1392
1393 /* Initialize the video buffers queue. */
1394 uvc_queue_init(&video->queue);
1395
1396 return 0;
1397}
1398
1399/*
1400 * Register the video devices.
1401 *
1402 * The driver currently supports a single video device per control interface
1403 * only. The terminal and units must match the following structure:
1404 *
1405 * ITT_CAMERA -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING
1406 *
1407 * The Extension Units, if present, must have a single input pin. The
1408 * Processing Unit and Extension Units can be in any order. Additional
1409 * Extension Units connected to the main chain as single-unit branches are
1410 * also supported.
1411 */
1412static int uvc_register_video(struct uvc_device *dev)
1413{
1414 struct video_device *vdev;
1415 struct uvc_entity *term;
1416 int found = 0, ret;
1417
1418 /* Check if the control interface matches the structure we expect. */
1419 list_for_each_entry(term, &dev->entities, list) {
1420 struct uvc_streaming *streaming;
1421
1422 if (UVC_ENTITY_TYPE(term) != TT_STREAMING)
1423 continue;
1424
1425 memset(&dev->video, 0, sizeof dev->video);
1426 mutex_init(&dev->video.ctrl_mutex);
1427 INIT_LIST_HEAD(&dev->video.iterms);
1428 INIT_LIST_HEAD(&dev->video.extensions);
1429 dev->video.oterm = term;
1430 dev->video.dev = dev;
1431 if (uvc_scan_chain(&dev->video) < 0)
1432 continue;
1433
1434 list_for_each_entry(streaming, &dev->streaming, list) {
1435 if (streaming->header.bTerminalLink == term->id) {
1436 dev->video.streaming = streaming;
1437 found = 1;
1438 break;
1439 }
1440 }
1441
1442 if (found)
1443 break;
1444 }
1445
1446 if (!found) {
1447 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1448 return -1;
1449 }
1450
1451 if (uvc_trace_param & UVC_TRACE_PROBE) {
1452 uvc_printk(KERN_INFO, "Found a valid video chain (");
1453 list_for_each_entry(term, &dev->video.iterms, chain) {
1454 printk("%d", term->id);
1455 if (term->chain.next != &dev->video.iterms)
1456 printk(",");
1457 }
1458 printk(" -> %d).\n", dev->video.oterm->id);
1459 }
1460
1461 /* Initialize the streaming interface with default streaming
1462 * parameters.
1463 */
1464 if ((ret = uvc_video_init(&dev->video)) < 0) {
1465 uvc_printk(KERN_ERR, "Failed to initialize the device "
1466 "(%d).\n", ret);
1467 return ret;
1468 }
1469
1470 /* Register the device with V4L. */
1471 vdev = video_device_alloc();
1472 if (vdev == NULL)
1473 return -1;
1474
1475 /* We already hold a reference to dev->udev. The video device will be
1476 * unregistered before the reference is released, so we don't need to
1477 * get another one.
1478 */
5e85e732 1479 vdev->parent = &dev->intf->dev;
c0efd232
LP		 1480 vdev->minor = -1;
1481 vdev->fops = &uvc_fops;
1482 vdev->release = video_device_release;
1483 strncpy(vdev->name, dev->name, sizeof vdev->name);
1484
1485 /* Set the driver data before calling video_register_device, otherwise
1486 * uvc_v4l2_open might race us.
1487 *
1488 * FIXME: usb_set_intfdata hasn't been called so far. Is that a
1489 * problem ? Does any function which could be called here get
1490 * a pointer to the usb_interface ?
1491 */
1492 dev->video.vdev = vdev;
1493 video_set_drvdata(vdev, &dev->video);
1494
1495 if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) {
1496 dev->video.vdev = NULL;
1497 video_device_release(vdev);
1498 return -1;
1499 }
1500
1501 return 0;
1502}
1503
1504/*
1505 * Delete the UVC device.
1506 *
1507 * Called by the kernel when the last reference to the uvc_device structure
1508 * is released.
1509 *
1510 * Unregistering the video devices is done here because every opened instance
1511 * must be closed before the device can be unregistered. An alternative would
1512 * have been to use another reference count for uvc_v4l2_open/uvc_release, and
1513 * unregister the video devices on disconnect when that reference count drops
1514 * to zero.
1515 *
1516 * As this function is called after or during disconnect(), all URBs have
1517 * already been canceled by the USB core. There is no need to kill the
1518 * interrupt URB manually.
1519 */
1520void uvc_delete(struct kref *kref)
1521{
1522 struct uvc_device *dev = container_of(kref, struct uvc_device, kref);
1523 struct list_head *p, *n;
1524
1525 /* Unregister the video device */
1526 uvc_unregister_video(dev);
1527 usb_put_intf(dev->intf);
1528 usb_put_dev(dev->udev);
1529
1530 uvc_status_cleanup(dev);
1531 uvc_ctrl_cleanup_device(dev);
1532
1533 list_for_each_safe(p, n, &dev->entities) {
1534 struct uvc_entity *entity;
1535 entity = list_entry(p, struct uvc_entity, list);
1536 kfree(entity);
1537 }
1538
1539 list_for_each_safe(p, n, &dev->streaming) {
1540 struct uvc_streaming *streaming;
1541 streaming = list_entry(p, struct uvc_streaming, list);
1542 usb_driver_release_interface(&uvc_driver.driver,
1543 streaming->intf);
1544 usb_put_intf(streaming->intf);
1545 kfree(streaming->format);
1546 kfree(streaming->header.bmaControls);
1547 kfree(streaming);
1548 }
1549
1550 kfree(dev);
1551}
1552
1553static int uvc_probe(struct usb_interface *intf,
1554 const struct usb_device_id *id)
1555{
1556 struct usb_device *udev = interface_to_usbdev(intf);
1557 struct uvc_device *dev;
1558 int ret;
1559
1560 if (id->idVendor && id->idProduct)
1561 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1562 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1563 id->idProduct);
1564 else
1565 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1566 udev->devpath);
1567
1568 /* Allocate memory for the device and initialize it */
1569 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1570 return -ENOMEM;
1571
1572 INIT_LIST_HEAD(&dev->entities);
1573 INIT_LIST_HEAD(&dev->streaming);
1574 kref_init(&dev->kref);
1575
1576 dev->udev = usb_get_dev(udev);
1577 dev->intf = usb_get_intf(intf);
1578 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1579 dev->quirks = id->driver_info | uvc_quirks_param;
1580
1581 if (udev->product != NULL)
1582 strncpy(dev->name, udev->product, sizeof dev->name);
1583 else
1584 snprintf(dev->name, sizeof dev->name,
1585 "UVC Camera (%04x:%04x)",
1586 le16_to_cpu(udev->descriptor.idVendor),
1587 le16_to_cpu(udev->descriptor.idProduct));
1588
1589 /* Parse the Video Class control descriptor */
1590 if (uvc_parse_control(dev) < 0) {
1591 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1592 "descriptors.\n");
1593 goto error;
1594 }
1595
1596 uvc_printk(KERN_INFO, "Found UVC %u.%02u device %s (%04x:%04x)\n",
1597 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1598 udev->product ? udev->product : "<unnamed>",
1599 le16_to_cpu(udev->descriptor.idVendor),
1600 le16_to_cpu(udev->descriptor.idProduct));
1601
1602 if (uvc_quirks_param != 0) {
1603 uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module "
1604 "parameter for testing purpose.\n", uvc_quirks_param);
1605 uvc_printk(KERN_INFO, "Please report required quirks to the "
1606 "linux-uvc-devel mailing list.\n");
1607 }
1608
1609 /* Initialize controls */
1610 if (uvc_ctrl_init_device(dev) < 0)
1611 goto error;
1612
1613 /* Register the video devices */
1614 if (uvc_register_video(dev) < 0)
1615 goto error;
1616
1617 /* Save our data pointer in the interface data */
1618 usb_set_intfdata(intf, dev);
1619
1620 /* Initialize the interrupt URB */
1621 if ((ret = uvc_status_init(dev)) < 0) {
1622 uvc_printk(KERN_INFO, "Unable to initialize the status "
1623 "endpoint (%d), status interrupt will not be "
1624 "supported.\n", ret);
1625 }
1626
1627 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1628 return 0;
1629
1630error:
1631 kref_put(&dev->kref, uvc_delete);
1632 return -ENODEV;
1633}
1634
1635static void uvc_disconnect(struct usb_interface *intf)
1636{
1637 struct uvc_device *dev = usb_get_intfdata(intf);
1638
1639 /* Set the USB interface data to NULL. This can be done outside the
1640 * lock, as there's no other reader.
1641 */
1642 usb_set_intfdata(intf, NULL);
1643
1644 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING)
1645 return;
1646
1647 /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide
1648 * lock is needed to prevent uvc_disconnect from releasing its
1649 * reference to the uvc_device instance after uvc_v4l2_open() received
1650 * the pointer to the device (video_devdata) but before it got the
1651 * chance to increase the reference count (kref_get).
a9e28585
LP		 1652 *
1653 * Note that the reference can't be released with the lock held,
1654 * otherwise a AB-BA deadlock can occur with videodev_lock that
1655 * videodev acquires in videodev_open() and video_unregister_device().
c0efd232
LP		 1656 */
1657 mutex_lock(&uvc_driver.open_mutex);
c0efd232 1658 dev->state |= UVC_DEV_DISCONNECTED;
c0efd232 1659 mutex_unlock(&uvc_driver.open_mutex);
a9e28585
LP		 1660
1661 kref_put(&dev->kref, uvc_delete);
c0efd232
LP		 1662}
1663
1664static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1665{
1666 struct uvc_device *dev = usb_get_intfdata(intf);
1667
1668 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1669 intf->cur_altsetting->desc.bInterfaceNumber);
1670
1671 /* Controls are cached on the fly so they don't need to be saved. */
1672 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL)
1673 return uvc_status_suspend(dev);
1674
1675 if (dev->video.streaming->intf != intf) {
1676 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB "
1677 "interface mismatch.\n");
1678 return -EINVAL;
1679 }
1680
1681 return uvc_video_suspend(&dev->video);
1682}
1683
9b0ae867 1684static int __uvc_resume(struct usb_interface *intf, int reset)
c0efd232
LP		 1685{
1686 struct uvc_device *dev = usb_get_intfdata(intf);
1687 int ret;
1688
1689 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1690 intf->cur_altsetting->desc.bInterfaceNumber);
1691
1692 if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) {
9b0ae867 1693 if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0)
c0efd232
LP		 1694 return ret;
1695
1696 return uvc_status_resume(dev);
1697 }
1698
1699 if (dev->video.streaming->intf != intf) {
1700 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB "
1701 "interface mismatch.\n");
1702 return -EINVAL;
1703 }
1704
1705 return uvc_video_resume(&dev->video);
1706}
1707
9b0ae867
LP		 1708static int uvc_resume(struct usb_interface *intf)
1709{
1710 return __uvc_resume(intf, 0);
1711}
1712
1713static int uvc_reset_resume(struct usb_interface *intf)
1714{
1715 return __uvc_resume(intf, 1);
1716}
1717
c0efd232
LP		 1718/* ------------------------------------------------------------------------
1719 * Driver initialization and cleanup
1720 */
1721
1722/*
1723 * The Logitech cameras listed below have their interface class set to
1724 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1725 * though they are compliant.
1726 */
1727static struct usb_device_id uvc_ids[] = {
c0efd232
LP		 1728 /* Microsoft Lifecam NX-6000 */
1729 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1730 | USB_DEVICE_ID_MATCH_INT_INFO,
1731 .idVendor = 0x045e,
1732 .idProduct = 0x00f8,
1733 .bInterfaceClass = USB_CLASS_VIDEO,
1734 .bInterfaceSubClass = 1,
1735 .bInterfaceProtocol = 0,
1736 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1737 /* Microsoft Lifecam VX-7000 */
1738 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1739 | USB_DEVICE_ID_MATCH_INT_INFO,
1740 .idVendor = 0x045e,
1741 .idProduct = 0x0723,
1742 .bInterfaceClass = USB_CLASS_VIDEO,
1743 .bInterfaceSubClass = 1,
1744 .bInterfaceProtocol = 0,
1745 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1746 /* Logitech Quickcam Fusion */
1747 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1748 | USB_DEVICE_ID_MATCH_INT_INFO,
1749 .idVendor = 0x046d,
1750 .idProduct = 0x08c1,
1751 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1752 .bInterfaceSubClass = 1,
1753 .bInterfaceProtocol = 0 },
1754 /* Logitech Quickcam Orbit MP */
1755 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1756 | USB_DEVICE_ID_MATCH_INT_INFO,
1757 .idVendor = 0x046d,
1758 .idProduct = 0x08c2,
1759 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1760 .bInterfaceSubClass = 1,
1761 .bInterfaceProtocol = 0 },
1762 /* Logitech Quickcam Pro for Notebook */
1763 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1764 | USB_DEVICE_ID_MATCH_INT_INFO,
1765 .idVendor = 0x046d,
1766 .idProduct = 0x08c3,
1767 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1768 .bInterfaceSubClass = 1,
1769 .bInterfaceProtocol = 0 },
1770 /* Logitech Quickcam Pro 5000 */
1771 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1772 | USB_DEVICE_ID_MATCH_INT_INFO,
1773 .idVendor = 0x046d,
1774 .idProduct = 0x08c5,
1775 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1776 .bInterfaceSubClass = 1,
1777 .bInterfaceProtocol = 0 },
1778 /* Logitech Quickcam OEM Dell Notebook */
1779 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1780 | USB_DEVICE_ID_MATCH_INT_INFO,
1781 .idVendor = 0x046d,
1782 .idProduct = 0x08c6,
1783 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1784 .bInterfaceSubClass = 1,
1785 .bInterfaceProtocol = 0 },
1786 /* Logitech Quickcam OEM Cisco VT Camera II */
1787 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1788 | USB_DEVICE_ID_MATCH_INT_INFO,
1789 .idVendor = 0x046d,
1790 .idProduct = 0x08c7,
1791 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
1792 .bInterfaceSubClass = 1,
1793 .bInterfaceProtocol = 0 },
1794 /* Apple Built-In iSight */
1795 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1796 | USB_DEVICE_ID_MATCH_INT_INFO,
1797 .idVendor = 0x05ac,
1798 .idProduct = 0x8501,
1799 .bInterfaceClass = USB_CLASS_VIDEO,
1800 .bInterfaceSubClass = 1,
1801 .bInterfaceProtocol = 0,
1802 .driver_info = UVC_QUIRK_PROBE_MINMAX
1803 | UVC_QUIRK_BUILTIN_ISIGHT },
1804 /* Genesys Logic USB 2.0 PC Camera */
1805 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1806 | USB_DEVICE_ID_MATCH_INT_INFO,
1807 .idVendor = 0x05e3,
1808 .idProduct = 0x0505,
1809 .bInterfaceClass = USB_CLASS_VIDEO,
1810 .bInterfaceSubClass = 1,
1811 .bInterfaceProtocol = 0,
1812 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1813 /* MT6227 */
1814 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1815 | USB_DEVICE_ID_MATCH_INT_INFO,
1816 .idVendor = 0x0e8d,
1817 .idProduct = 0x0004,
1818 .bInterfaceClass = USB_CLASS_VIDEO,
1819 .bInterfaceSubClass = 1,
1820 .bInterfaceProtocol = 0,
1821 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1822 /* Syntek (HP Spartan) */
1823 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1824 | USB_DEVICE_ID_MATCH_INT_INFO,
1825 .idVendor = 0x174f,
1826 .idProduct = 0x5212,
1827 .bInterfaceClass = USB_CLASS_VIDEO,
1828 .bInterfaceSubClass = 1,
1829 .bInterfaceProtocol = 0,
25e69850 1830 .driver_info = UVC_QUIRK_STREAM_NO_FID },
562f0fed
LP		 1831 /* Syntek (Samsung Q310) */
1832 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1833 | USB_DEVICE_ID_MATCH_INT_INFO,
1834 .idVendor = 0x174f,
1835 .idProduct = 0x5931,
1836 .bInterfaceClass = USB_CLASS_VIDEO,
1837 .bInterfaceSubClass = 1,
1838 .bInterfaceProtocol = 0,
1839 .driver_info = UVC_QUIRK_STREAM_NO_FID },
25e69850
LP		 1840 /* Asus F9SG */
1841 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1842 | USB_DEVICE_ID_MATCH_INT_INFO,
1843 .idVendor = 0x174f,
1844 .idProduct = 0x8a31,
1845 .bInterfaceClass = USB_CLASS_VIDEO,
1846 .bInterfaceSubClass = 1,
1847 .bInterfaceProtocol = 0,
c0efd232
LP		 1848 .driver_info = UVC_QUIRK_STREAM_NO_FID },
1849 /* Syntek (Asus U3S) */
1850 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1851 | USB_DEVICE_ID_MATCH_INT_INFO,
1852 .idVendor = 0x174f,
1853 .idProduct = 0x8a33,
1854 .bInterfaceClass = USB_CLASS_VIDEO,
1855 .bInterfaceSubClass = 1,
1856 .bInterfaceProtocol = 0,
1857 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2f38483b
LP		 1858 /* Lenovo Thinkpad SL500 */
1859 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1860 | USB_DEVICE_ID_MATCH_INT_INFO,
1861 .idVendor = 0x17ef,
1862 .idProduct = 0x480b,
1863 .bInterfaceClass = USB_CLASS_VIDEO,
1864 .bInterfaceSubClass = 1,
1865 .bInterfaceProtocol = 0,
1866 .driver_info = UVC_QUIRK_STREAM_NO_FID },
c0efd232
LP		 1867 /* Ecamm Pico iMage */
1868 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1869 | USB_DEVICE_ID_MATCH_INT_INFO,
1870 .idVendor = 0x18cd,
1871 .idProduct = 0xcafe,
1872 .bInterfaceClass = USB_CLASS_VIDEO,
1873 .bInterfaceSubClass = 1,
1874 .bInterfaceProtocol = 0,
1875 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
1876 /* Bodelin ProScopeHR */
1877 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1878 | USB_DEVICE_ID_MATCH_DEV_HI
1879 | USB_DEVICE_ID_MATCH_INT_INFO,
1880 .idVendor = 0x19ab,
1881 .idProduct = 0x1000,
1882 .bcdDevice_hi = 0x0126,
1883 .bInterfaceClass = USB_CLASS_VIDEO,
1884 .bInterfaceSubClass = 1,
1885 .bInterfaceProtocol = 0,
1886 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
1887 /* SiGma Micro USB Web Camera */
1888 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
1889 | USB_DEVICE_ID_MATCH_INT_INFO,
1890 .idVendor = 0x1c4f,
1891 .idProduct = 0x3000,
1892 .bInterfaceClass = USB_CLASS_VIDEO,
1893 .bInterfaceSubClass = 1,
1894 .bInterfaceProtocol = 0,
1895 .driver_info = UVC_QUIRK_PROBE_MINMAX
1896 | UVC_QUIRK_IGNORE_SELECTOR_UNIT},
c0efd232
LP		 1897 /* Generic USB Video Class */
1898 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
1899 {}
1900};
1901
1902MODULE_DEVICE_TABLE(usb, uvc_ids);
1903
1904struct uvc_driver uvc_driver = {
1905 .driver = {
1906 .name = "uvcvideo",
1907 .probe = uvc_probe,
1908 .disconnect = uvc_disconnect,
1909 .suspend = uvc_suspend,
1910 .resume = uvc_resume,
9b0ae867 1911 .reset_resume = uvc_reset_resume,
c0efd232
LP		 1912 .id_table = uvc_ids,
1913 .supports_autosuspend = 1,
1914 },
1915};
1916
1917static int __init uvc_init(void)
1918{
1919 int result;
1920
1921 INIT_LIST_HEAD(&uvc_driver.devices);
1922 INIT_LIST_HEAD(&uvc_driver.controls);
1923 mutex_init(&uvc_driver.open_mutex);
1924 mutex_init(&uvc_driver.ctrl_mutex);
1925
1926 uvc_ctrl_init();
1927
1928 result = usb_register(&uvc_driver.driver);
1929 if (result == 0)
1930 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
1931 return result;
1932}
1933
1934static void __exit uvc_cleanup(void)
1935{
1936 usb_deregister(&uvc_driver.driver);
1937}
1938
1939module_init(uvc_init);
1940module_exit(uvc_cleanup);
1941
1942module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
1943MODULE_PARM_DESC(quirks, "Forced device quirks");
1944module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
1945MODULE_PARM_DESC(trace, "Trace level bitmask");
1946
1947MODULE_AUTHOR(DRIVER_AUTHOR);
1948MODULE_DESCRIPTION(DRIVER_DESC);
1949MODULE_LICENSE("GPL");
1950MODULE_VERSION(DRIVER_VERSION);
f87086e3 1951
kernel source for telekom puls (alcatel/mediatek)