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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / media / usb / uvc / uvc_driver.c
blobfd387bf3f02db8ec09d8aa328e4376423ca12365
1 /*
2 * uvc_driver.c -- USB Video Class driver
3 *
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 */
13
14 #include <linux/atomic.h>
15 #include <linux/kernel.h>
16 #include <linux/list.h>
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/usb.h>
20 #include <linux/videodev2.h>
21 #include <linux/vmalloc.h>
22 #include <linux/wait.h>
23 #include <linux/version.h>
24 #include <asm/unaligned.h>
25
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-ioctl.h>
28
29 #include "uvcvideo.h"
30
31 #define DRIVER_AUTHOR "Laurent Pinchart " \
32 "<laurent.pinchart@ideasonboard.com>"
33 #define DRIVER_DESC "USB Video Class driver"
34
35 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
36 unsigned int uvc_hw_timestamps_param;
37 unsigned int uvc_no_drop_param;
38 static unsigned int uvc_quirks_param = -1;
39 unsigned int uvc_trace_param;
40 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
41
42 /* ------------------------------------------------------------------------
43 * Video formats
44 */
45
46 static struct uvc_format_desc uvc_fmts[] = {
47 {
48 .name = "YUV 4:2:2 (YUYV)",
49 .guid = UVC_GUID_FORMAT_YUY2,
50 .fcc = V4L2_PIX_FMT_YUYV,
51 },
52 {
53 .name = "YUV 4:2:2 (YUYV)",
54 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
55 .fcc = V4L2_PIX_FMT_YUYV,
56 },
57 {
58 .name = "YUV 4:2:0 (NV12)",
59 .guid = UVC_GUID_FORMAT_NV12,
60 .fcc = V4L2_PIX_FMT_NV12,
61 },
62 {
63 .name = "MJPEG",
64 .guid = UVC_GUID_FORMAT_MJPEG,
65 .fcc = V4L2_PIX_FMT_MJPEG,
66 },
67 {
68 .name = "YVU 4:2:0 (YV12)",
69 .guid = UVC_GUID_FORMAT_YV12,
70 .fcc = V4L2_PIX_FMT_YVU420,
71 },
72 {
73 .name = "YUV 4:2:0 (I420)",
74 .guid = UVC_GUID_FORMAT_I420,
75 .fcc = V4L2_PIX_FMT_YUV420,
76 },
77 {
78 .name = "YUV 4:2:0 (M420)",
79 .guid = UVC_GUID_FORMAT_M420,
80 .fcc = V4L2_PIX_FMT_M420,
81 },
82 {
83 .name = "YUV 4:2:2 (UYVY)",
84 .guid = UVC_GUID_FORMAT_UYVY,
85 .fcc = V4L2_PIX_FMT_UYVY,
86 },
87 {
88 .name = "Greyscale 8-bit (Y800)",
89 .guid = UVC_GUID_FORMAT_Y800,
90 .fcc = V4L2_PIX_FMT_GREY,
91 },
92 {
93 .name = "Greyscale 8-bit (Y8 )",
94 .guid = UVC_GUID_FORMAT_Y8,
95 .fcc = V4L2_PIX_FMT_GREY,
96 },
97 {
98 .name = "Greyscale 8-bit (D3DFMT_L8)",
99 .guid = UVC_GUID_FORMAT_D3DFMT_L8,
100 .fcc = V4L2_PIX_FMT_GREY,
101 },
102 {
103 .name = "Greyscale 10-bit (Y10 )",
104 .guid = UVC_GUID_FORMAT_Y10,
105 .fcc = V4L2_PIX_FMT_Y10,
106 },
107 {
108 .name = "Greyscale 12-bit (Y12 )",
109 .guid = UVC_GUID_FORMAT_Y12,
110 .fcc = V4L2_PIX_FMT_Y12,
111 },
112 {
113 .name = "Greyscale 16-bit (Y16 )",
114 .guid = UVC_GUID_FORMAT_Y16,
115 .fcc = V4L2_PIX_FMT_Y16,
116 },
117 {
118 .name = "BGGR Bayer (BY8 )",
119 .guid = UVC_GUID_FORMAT_BY8,
120 .fcc = V4L2_PIX_FMT_SBGGR8,
121 },
122 {
123 .name = "BGGR Bayer (BA81)",
124 .guid = UVC_GUID_FORMAT_BA81,
125 .fcc = V4L2_PIX_FMT_SBGGR8,
126 },
127 {
128 .name = "GBRG Bayer (GBRG)",
129 .guid = UVC_GUID_FORMAT_GBRG,
130 .fcc = V4L2_PIX_FMT_SGBRG8,
131 },
132 {
133 .name = "GRBG Bayer (GRBG)",
134 .guid = UVC_GUID_FORMAT_GRBG,
135 .fcc = V4L2_PIX_FMT_SGRBG8,
136 },
137 {
138 .name = "RGGB Bayer (RGGB)",
139 .guid = UVC_GUID_FORMAT_RGGB,
140 .fcc = V4L2_PIX_FMT_SRGGB8,
141 },
142 {
143 .name = "RGB565",
144 .guid = UVC_GUID_FORMAT_RGBP,
145 .fcc = V4L2_PIX_FMT_RGB565,
146 },
147 {
148 .name = "BGR 8:8:8 (BGR3)",
149 .guid = UVC_GUID_FORMAT_BGR3,
150 .fcc = V4L2_PIX_FMT_BGR24,
151 },
152 {
153 .name = "H.264",
154 .guid = UVC_GUID_FORMAT_H264,
155 .fcc = V4L2_PIX_FMT_H264,
156 },
157 {
158 .name = "Greyscale 8 L/R (Y8I)",
159 .guid = UVC_GUID_FORMAT_Y8I,
160 .fcc = V4L2_PIX_FMT_Y8I,
161 },
162 {
163 .name = "Greyscale 12 L/R (Y12I)",
164 .guid = UVC_GUID_FORMAT_Y12I,
165 .fcc = V4L2_PIX_FMT_Y12I,
166 },
167 {
168 .name = "Depth data 16-bit (Z16)",
169 .guid = UVC_GUID_FORMAT_Z16,
170 .fcc = V4L2_PIX_FMT_Z16,
171 },
172 {
173 .name = "Bayer 10-bit (SRGGB10P)",
174 .guid = UVC_GUID_FORMAT_RW10,
175 .fcc = V4L2_PIX_FMT_SRGGB10P,
176 },
177 {
178 .name = "Bayer 16-bit (SBGGR16)",
179 .guid = UVC_GUID_FORMAT_BG16,
180 .fcc = V4L2_PIX_FMT_SBGGR16,
181 },
182 {
183 .name = "Bayer 16-bit (SGBRG16)",
184 .guid = UVC_GUID_FORMAT_GB16,
185 .fcc = V4L2_PIX_FMT_SGBRG16,
186 },
187 {
188 .name = "Bayer 16-bit (SRGGB16)",
189 .guid = UVC_GUID_FORMAT_RG16,
190 .fcc = V4L2_PIX_FMT_SRGGB16,
191 },
192 {
193 .name = "Bayer 16-bit (SGRBG16)",
194 .guid = UVC_GUID_FORMAT_GR16,
195 .fcc = V4L2_PIX_FMT_SGRBG16,
196 },
197 {
198 .name = "Depth data 16-bit (Z16)",
199 .guid = UVC_GUID_FORMAT_INVZ,
200 .fcc = V4L2_PIX_FMT_Z16,
201 },
202 {
203 .name = "Greyscale 10-bit (Y10 )",
204 .guid = UVC_GUID_FORMAT_INVI,
205 .fcc = V4L2_PIX_FMT_Y10,
206 },
207 {
208 .name = "IR:Depth 26-bit (INZI)",
209 .guid = UVC_GUID_FORMAT_INZI,
210 .fcc = V4L2_PIX_FMT_INZI,
211 },
212 };
213
214 /* ------------------------------------------------------------------------
215 * Utility functions
216 */
217
218 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
219 __u8 epaddr)
220 {
221 struct usb_host_endpoint *ep;
222 unsigned int i;
223
224 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
225 ep = &alts->endpoint[i];
226 if (ep->desc.bEndpointAddress == epaddr)
227 return ep;
228 }
229
230 return NULL;
231 }
232
233 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
234 {
235 unsigned int len = ARRAY_SIZE(uvc_fmts);
236 unsigned int i;
237
238 for (i = 0; i < len; ++i) {
239 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
240 return &uvc_fmts[i];
241 }
242
243 return NULL;
244 }
245
246 static __u32 uvc_colorspace(const __u8 primaries)
247 {
248 static const __u8 colorprimaries[] = {
249 0,
250 V4L2_COLORSPACE_SRGB,
251 V4L2_COLORSPACE_470_SYSTEM_M,
252 V4L2_COLORSPACE_470_SYSTEM_BG,
253 V4L2_COLORSPACE_SMPTE170M,
254 V4L2_COLORSPACE_SMPTE240M,
255 };
256
257 if (primaries < ARRAY_SIZE(colorprimaries))
258 return colorprimaries[primaries];
259
260 return 0;
261 }
262
263 /* Simplify a fraction using a simple continued fraction decomposition. The
264 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
265 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
266 * arbitrary parameters to remove non-significative terms from the simple
267 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
268 * respectively seems to give nice results.
269 */
270 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
271 unsigned int n_terms, unsigned int threshold)
272 {
273 uint32_t *an;
274 uint32_t x, y, r;
275 unsigned int i, n;
276
277 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
278 if (an == NULL)
279 return;
280
281 /* Convert the fraction to a simple continued fraction. See
282 * http://mathforum.org/dr.math/faq/faq.fractions.html
283 * Stop if the current term is bigger than or equal to the given
284 * threshold.
285 */
286 x = *numerator;
287 y = *denominator;
288
289 for (n = 0; n < n_terms && y != 0; ++n) {
290 an[n] = x / y;
291 if (an[n] >= threshold) {
292 if (n < 2)
293 n++;
294 break;
295 }
296
297 r = x - an[n] * y;
298 x = y;
299 y = r;
300 }
301
302 /* Expand the simple continued fraction back to an integer fraction. */
303 x = 0;
304 y = 1;
305
306 for (i = n; i > 0; --i) {
307 r = y;
308 y = an[i-1] * y + x;
309 x = r;
310 }
311
312 *numerator = y;
313 *denominator = x;
314 kfree(an);
315 }
316
317 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
318 * to compute numerator / denominator * 10000000 using 32 bit fixed point
319 * arithmetic only.
320 */
321 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
322 {
323 uint32_t multiplier;
324
325 /* Saturate the result if the operation would overflow. */
326 if (denominator == 0 ||
327 numerator/denominator >= ((uint32_t)-1)/10000000)
328 return (uint32_t)-1;
329
330 /* Divide both the denominator and the multiplier by two until
331 * numerator * multiplier doesn't overflow. If anyone knows a better
332 * algorithm please let me know.
333 */
334 multiplier = 10000000;
335 while (numerator > ((uint32_t)-1)/multiplier) {
336 multiplier /= 2;
337 denominator /= 2;
338 }
339
340 return denominator ? numerator * multiplier / denominator : 0;
341 }
342
343 /* ------------------------------------------------------------------------
344 * Terminal and unit management
345 */
346
347 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
348 {
349 struct uvc_entity *entity;
350
351 list_for_each_entry(entity, &dev->entities, list) {
352 if (entity->id == id)
353 return entity;
354 }
355
356 return NULL;
357 }
358
359 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
360 int id, struct uvc_entity *entity)
361 {
362 unsigned int i;
363
364 if (entity == NULL)
365 entity = list_entry(&dev->entities, struct uvc_entity, list);
366
367 list_for_each_entry_continue(entity, &dev->entities, list) {
368 for (i = 0; i < entity->bNrInPins; ++i)
369 if (entity->baSourceID[i] == id)
370 return entity;
371 }
372
373 return NULL;
374 }
375
376 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
377 {
378 struct uvc_streaming *stream;
379
380 list_for_each_entry(stream, &dev->streams, list) {
381 if (stream->header.bTerminalLink == id)
382 return stream;
383 }
384
385 return NULL;
386 }
387
388 /* ------------------------------------------------------------------------
389 * Descriptors parsing
390 */
391
392 static int uvc_parse_format(struct uvc_device *dev,
393 struct uvc_streaming *streaming, struct uvc_format *format,
394 __u32 **intervals, unsigned char *buffer, int buflen)
395 {
396 struct usb_interface *intf = streaming->intf;
397 struct usb_host_interface *alts = intf->cur_altsetting;
398 struct uvc_format_desc *fmtdesc;
399 struct uvc_frame *frame;
400 const unsigned char *start = buffer;
401 unsigned int width_multiplier = 1;
402 unsigned int interval;
403 unsigned int i, n;
404 __u8 ftype;
405
406 format->type = buffer[2];
407 format->index = buffer[3];
408
409 switch (buffer[2]) {
410 case UVC_VS_FORMAT_UNCOMPRESSED:
411 case UVC_VS_FORMAT_FRAME_BASED:
412 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
413 if (buflen < n) {
414 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
415 "interface %d FORMAT error\n",
416 dev->udev->devnum,
417 alts->desc.bInterfaceNumber);
418 return -EINVAL;
419 }
420
421 /* Find the format descriptor from its GUID. */
422 fmtdesc = uvc_format_by_guid(&buffer[5]);
423
424 if (fmtdesc != NULL) {
425 strlcpy(format->name, fmtdesc->name,
426 sizeof format->name);
427 format->fcc = fmtdesc->fcc;
428 } else {
429 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
430 &buffer[5]);
431 snprintf(format->name, sizeof(format->name), "%pUl\n",
432 &buffer[5]);
433 format->fcc = 0;
434 }
435
436 format->bpp = buffer[21];
437
438 /* Some devices report a format that doesn't match what they
439 * really send.
440 */
441 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
442 if (format->fcc == V4L2_PIX_FMT_YUYV) {
443 strlcpy(format->name, "Greyscale 8-bit (Y8 )",
444 sizeof(format->name));
445 format->fcc = V4L2_PIX_FMT_GREY;
446 format->bpp = 8;
447 width_multiplier = 2;
448 }
449 }
450
451 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
452 ftype = UVC_VS_FRAME_UNCOMPRESSED;
453 } else {
454 ftype = UVC_VS_FRAME_FRAME_BASED;
455 if (buffer[27])
456 format->flags = UVC_FMT_FLAG_COMPRESSED;
457 }
458 break;
459
460 case UVC_VS_FORMAT_MJPEG:
461 if (buflen < 11) {
462 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
463 "interface %d FORMAT error\n",
464 dev->udev->devnum,
465 alts->desc.bInterfaceNumber);
466 return -EINVAL;
467 }
468
469 strlcpy(format->name, "MJPEG", sizeof format->name);
470 format->fcc = V4L2_PIX_FMT_MJPEG;
471 format->flags = UVC_FMT_FLAG_COMPRESSED;
472 format->bpp = 0;
473 ftype = UVC_VS_FRAME_MJPEG;
474 break;
475
476 case UVC_VS_FORMAT_DV:
477 if (buflen < 9) {
478 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
479 "interface %d FORMAT error\n",
480 dev->udev->devnum,
481 alts->desc.bInterfaceNumber);
482 return -EINVAL;
483 }
484
485 switch (buffer[8] & 0x7f) {
486 case 0:
487 strlcpy(format->name, "SD-DV", sizeof format->name);
488 break;
489 case 1:
490 strlcpy(format->name, "SDL-DV", sizeof format->name);
491 break;
492 case 2:
493 strlcpy(format->name, "HD-DV", sizeof format->name);
494 break;
495 default:
496 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
497 "interface %d: unknown DV format %u\n",
498 dev->udev->devnum,
499 alts->desc.bInterfaceNumber, buffer[8]);
500 return -EINVAL;
501 }
502
503 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
504 sizeof format->name);
505
506 format->fcc = V4L2_PIX_FMT_DV;
507 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
508 format->bpp = 0;
509 ftype = 0;
510
511 /* Create a dummy frame descriptor. */
512 frame = &format->frame[0];
513 memset(&format->frame[0], 0, sizeof format->frame[0]);
514 frame->bFrameIntervalType = 1;
515 frame->dwDefaultFrameInterval = 1;
516 frame->dwFrameInterval = *intervals;
517 *(*intervals)++ = 1;
518 format->nframes = 1;
519 break;
520
521 case UVC_VS_FORMAT_MPEG2TS:
522 case UVC_VS_FORMAT_STREAM_BASED:
523 /* Not supported yet. */
524 default:
525 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
526 "interface %d unsupported format %u\n",
527 dev->udev->devnum, alts->desc.bInterfaceNumber,
528 buffer[2]);
529 return -EINVAL;
530 }
531
532 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
533
534 buflen -= buffer[0];
535 buffer += buffer[0];
536
537 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
538 * based formats have frame descriptors.
539 */
540 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
541 buffer[2] == ftype) {
542 frame = &format->frame[format->nframes];
543 if (ftype != UVC_VS_FRAME_FRAME_BASED)
544 n = buflen > 25 ? buffer[25] : 0;
545 else
546 n = buflen > 21 ? buffer[21] : 0;
547
548 n = n ? n : 3;
549
550 if (buflen < 26 + 4*n) {
551 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
552 "interface %d FRAME error\n", dev->udev->devnum,
553 alts->desc.bInterfaceNumber);
554 return -EINVAL;
555 }
556
557 frame->bFrameIndex = buffer[3];
558 frame->bmCapabilities = buffer[4];
559 frame->wWidth = get_unaligned_le16(&buffer[5])
560 * width_multiplier;
561 frame->wHeight = get_unaligned_le16(&buffer[7]);
562 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
563 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
564 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
565 frame->dwMaxVideoFrameBufferSize =
566 get_unaligned_le32(&buffer[17]);
567 frame->dwDefaultFrameInterval =
568 get_unaligned_le32(&buffer[21]);
569 frame->bFrameIntervalType = buffer[25];
570 } else {
571 frame->dwMaxVideoFrameBufferSize = 0;
572 frame->dwDefaultFrameInterval =
573 get_unaligned_le32(&buffer[17]);
574 frame->bFrameIntervalType = buffer[21];
575 }
576 frame->dwFrameInterval = *intervals;
577
578 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
579 * completely. Observed behaviours range from setting the
580 * value to 1.1x the actual frame size to hardwiring the
581 * 16 low bits to 0. This results in a higher than necessary
582 * memory usage as well as a wrong image size information. For
583 * uncompressed formats this can be fixed by computing the
584 * value from the frame size.
585 */
586 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
587 frame->dwMaxVideoFrameBufferSize = format->bpp
588 * frame->wWidth * frame->wHeight / 8;
589
590 /* Some bogus devices report dwMinFrameInterval equal to
591 * dwMaxFrameInterval and have dwFrameIntervalStep set to
592 * zero. Setting all null intervals to 1 fixes the problem and
593 * some other divisions by zero that could happen.
594 */
595 for (i = 0; i < n; ++i) {
596 interval = get_unaligned_le32(&buffer[26+4*i]);
597 *(*intervals)++ = interval ? interval : 1;
598 }
599
600 /* Make sure that the default frame interval stays between
601 * the boundaries.
602 */
603 n -= frame->bFrameIntervalType ? 1 : 2;
604 frame->dwDefaultFrameInterval =
605 min(frame->dwFrameInterval[n],
606 max(frame->dwFrameInterval[0],
607 frame->dwDefaultFrameInterval));
608
609 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
610 frame->bFrameIntervalType = 1;
611 frame->dwFrameInterval[0] =
612 frame->dwDefaultFrameInterval;
613 }
614
615 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
616 frame->wWidth, frame->wHeight,
617 10000000/frame->dwDefaultFrameInterval,
618 (100000000/frame->dwDefaultFrameInterval)%10);
619
620 format->nframes++;
621 buflen -= buffer[0];
622 buffer += buffer[0];
623 }
624
625 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
626 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
627 buflen -= buffer[0];
628 buffer += buffer[0];
629 }
630
631 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
632 buffer[2] == UVC_VS_COLORFORMAT) {
633 if (buflen < 6) {
634 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
635 "interface %d COLORFORMAT error\n",
636 dev->udev->devnum,
637 alts->desc.bInterfaceNumber);
638 return -EINVAL;
639 }
640
641 format->colorspace = uvc_colorspace(buffer[3]);
642
643 buflen -= buffer[0];
644 buffer += buffer[0];
645 }
646
647 return buffer - start;
648 }
649
650 static int uvc_parse_streaming(struct uvc_device *dev,
651 struct usb_interface *intf)
652 {
653 struct uvc_streaming *streaming = NULL;
654 struct uvc_format *format;
655 struct uvc_frame *frame;
656 struct usb_host_interface *alts = &intf->altsetting[0];
657 unsigned char *_buffer, *buffer = alts->extra;
658 int _buflen, buflen = alts->extralen;
659 unsigned int nformats = 0, nframes = 0, nintervals = 0;
660 unsigned int size, i, n, p;
661 __u32 *interval;
662 __u16 psize;
663 int ret = -EINVAL;
664
665 if (intf->cur_altsetting->desc.bInterfaceSubClass
666 != UVC_SC_VIDEOSTREAMING) {
667 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
668 "video streaming interface\n", dev->udev->devnum,
669 intf->altsetting[0].desc.bInterfaceNumber);
670 return -EINVAL;
671 }
672
673 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
674 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
675 "claimed\n", dev->udev->devnum,
676 intf->altsetting[0].desc.bInterfaceNumber);
677 return -EINVAL;
678 }
679
680 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
681 if (streaming == NULL) {
682 usb_driver_release_interface(&uvc_driver.driver, intf);
683 return -EINVAL;
684 }
685
686 mutex_init(&streaming->mutex);
687 streaming->dev = dev;
688 streaming->intf = usb_get_intf(intf);
689 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
690
691 /* The Pico iMage webcam has its class-specific interface descriptors
692 * after the endpoint descriptors.
693 */
694 if (buflen == 0) {
695 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
696 struct usb_host_endpoint *ep = &alts->endpoint[i];
697
698 if (ep->extralen == 0)
699 continue;
700
701 if (ep->extralen > 2 &&
702 ep->extra[1] == USB_DT_CS_INTERFACE) {
703 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
704 "from endpoint %u.\n", i);
705 buffer = alts->endpoint[i].extra;
706 buflen = alts->endpoint[i].extralen;
707 break;
708 }
709 }
710 }
711
712 /* Skip the standard interface descriptors. */
713 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
714 buflen -= buffer[0];
715 buffer += buffer[0];
716 }
717
718 if (buflen <= 2) {
719 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
720 "interface descriptors found.\n");
721 goto error;
722 }
723
724 /* Parse the header descriptor. */
725 switch (buffer[2]) {
726 case UVC_VS_OUTPUT_HEADER:
727 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
728 size = 9;
729 break;
730
731 case UVC_VS_INPUT_HEADER:
732 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
733 size = 13;
734 break;
735
736 default:
737 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
738 "%d HEADER descriptor not found.\n", dev->udev->devnum,
739 alts->desc.bInterfaceNumber);
740 goto error;
741 }
742
743 p = buflen >= 4 ? buffer[3] : 0;
744 n = buflen >= size ? buffer[size-1] : 0;
745
746 if (buflen < size + p*n) {
747 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
748 "interface %d HEADER descriptor is invalid.\n",
749 dev->udev->devnum, alts->desc.bInterfaceNumber);
750 goto error;
751 }
752
753 streaming->header.bNumFormats = p;
754 streaming->header.bEndpointAddress = buffer[6];
755 if (buffer[2] == UVC_VS_INPUT_HEADER) {
756 streaming->header.bmInfo = buffer[7];
757 streaming->header.bTerminalLink = buffer[8];
758 streaming->header.bStillCaptureMethod = buffer[9];
759 streaming->header.bTriggerSupport = buffer[10];
760 streaming->header.bTriggerUsage = buffer[11];
761 } else {
762 streaming->header.bTerminalLink = buffer[7];
763 }
764 streaming->header.bControlSize = n;
765
766 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
767 GFP_KERNEL);
768 if (streaming->header.bmaControls == NULL) {
769 ret = -ENOMEM;
770 goto error;
771 }
772
773 buflen -= buffer[0];
774 buffer += buffer[0];
775
776 _buffer = buffer;
777 _buflen = buflen;
778
779 /* Count the format and frame descriptors. */
780 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
781 switch (_buffer[2]) {
782 case UVC_VS_FORMAT_UNCOMPRESSED:
783 case UVC_VS_FORMAT_MJPEG:
784 case UVC_VS_FORMAT_FRAME_BASED:
785 nformats++;
786 break;
787
788 case UVC_VS_FORMAT_DV:
789 /* DV format has no frame descriptor. We will create a
790 * dummy frame descriptor with a dummy frame interval.
791 */
792 nformats++;
793 nframes++;
794 nintervals++;
795 break;
796
797 case UVC_VS_FORMAT_MPEG2TS:
798 case UVC_VS_FORMAT_STREAM_BASED:
799 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
800 "interface %d FORMAT %u is not supported.\n",
801 dev->udev->devnum,
802 alts->desc.bInterfaceNumber, _buffer[2]);
803 break;
804
805 case UVC_VS_FRAME_UNCOMPRESSED:
806 case UVC_VS_FRAME_MJPEG:
807 nframes++;
808 if (_buflen > 25)
809 nintervals += _buffer[25] ? _buffer[25] : 3;
810 break;
811
812 case UVC_VS_FRAME_FRAME_BASED:
813 nframes++;
814 if (_buflen > 21)
815 nintervals += _buffer[21] ? _buffer[21] : 3;
816 break;
817 }
818
819 _buflen -= _buffer[0];
820 _buffer += _buffer[0];
821 }
822
823 if (nformats == 0) {
824 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
825 "%d has no supported formats defined.\n",
826 dev->udev->devnum, alts->desc.bInterfaceNumber);
827 goto error;
828 }
829
830 size = nformats * sizeof *format + nframes * sizeof *frame
831 + nintervals * sizeof *interval;
832 format = kzalloc(size, GFP_KERNEL);
833 if (format == NULL) {
834 ret = -ENOMEM;
835 goto error;
836 }
837
838 frame = (struct uvc_frame *)&format[nformats];
839 interval = (__u32 *)&frame[nframes];
840
841 streaming->format = format;
842 streaming->nformats = nformats;
843
844 /* Parse the format descriptors. */
845 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
846 switch (buffer[2]) {
847 case UVC_VS_FORMAT_UNCOMPRESSED:
848 case UVC_VS_FORMAT_MJPEG:
849 case UVC_VS_FORMAT_DV:
850 case UVC_VS_FORMAT_FRAME_BASED:
851 format->frame = frame;
852 ret = uvc_parse_format(dev, streaming, format,
853 &interval, buffer, buflen);
854 if (ret < 0)
855 goto error;
856
857 frame += format->nframes;
858 format++;
859
860 buflen -= ret;
861 buffer += ret;
862 continue;
863
864 default:
865 break;
866 }
867
868 buflen -= buffer[0];
869 buffer += buffer[0];
870 }
871
872 if (buflen)
873 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
874 "%d has %u bytes of trailing descriptor garbage.\n",
875 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
876
877 /* Parse the alternate settings to find the maximum bandwidth. */
878 for (i = 0; i < intf->num_altsetting; ++i) {
879 struct usb_host_endpoint *ep;
880 alts = &intf->altsetting[i];
881 ep = uvc_find_endpoint(alts,
882 streaming->header.bEndpointAddress);
883 if (ep == NULL)
884 continue;
885
886 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
887 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
888 if (psize > streaming->maxpsize)
889 streaming->maxpsize = psize;
890 }
891
892 list_add_tail(&streaming->list, &dev->streams);
893 return 0;
894
895 error:
896 usb_driver_release_interface(&uvc_driver.driver, intf);
897 usb_put_intf(intf);
898 kfree(streaming->format);
899 kfree(streaming->header.bmaControls);
900 kfree(streaming);
901 return ret;
902 }
903
904 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
905 unsigned int num_pads, unsigned int extra_size)
906 {
907 struct uvc_entity *entity;
908 unsigned int num_inputs;
909 unsigned int size;
910 unsigned int i;
911
912 extra_size = ALIGN(extra_size, sizeof(*entity->pads));
913 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
914 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
915 + num_inputs;
916 entity = kzalloc(size, GFP_KERNEL);
917 if (entity == NULL)
918 return NULL;
919
920 entity->id = id;
921 entity->type = type;
922
923 entity->num_links = 0;
924 entity->num_pads = num_pads;
925 entity->pads = ((void *)(entity + 1)) + extra_size;
926
927 for (i = 0; i < num_inputs; ++i)
928 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
929 if (!UVC_ENTITY_IS_OTERM(entity))
930 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
931
932 entity->bNrInPins = num_inputs;
933 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
934
935 return entity;
936 }
937
938 /* Parse vendor-specific extensions. */
939 static int uvc_parse_vendor_control(struct uvc_device *dev,
940 const unsigned char *buffer, int buflen)
941 {
942 struct usb_device *udev = dev->udev;
943 struct usb_host_interface *alts = dev->intf->cur_altsetting;
944 struct uvc_entity *unit;
945 unsigned int n, p;
946 int handled = 0;
947
948 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
949 case 0x046d: /* Logitech */
950 if (buffer[1] != 0x41 || buffer[2] != 0x01)
951 break;
952
953 /* Logitech implements several vendor specific functions
954 * through vendor specific extension units (LXU).
955 *
956 * The LXU descriptors are similar to XU descriptors
957 * (see "USB Device Video Class for Video Devices", section
958 * 3.7.2.6 "Extension Unit Descriptor") with the following
959 * differences:
960 *
961 * ----------------------------------------------------------
962 * 0 bLength 1 Number
963 * Size of this descriptor, in bytes: 24+p+n*2
964 * ----------------------------------------------------------
965 * 23+p+n bmControlsType N Bitmap
966 * Individual bits in the set are defined:
967 * 0: Absolute
968 * 1: Relative
969 *
970 * This bitset is mapped exactly the same as bmControls.
971 * ----------------------------------------------------------
972 * 23+p+n*2 bReserved 1 Boolean
973 * ----------------------------------------------------------
974 * 24+p+n*2 iExtension 1 Index
975 * Index of a string descriptor that describes this
976 * extension unit.
977 * ----------------------------------------------------------
978 */
979 p = buflen >= 22 ? buffer[21] : 0;
980 n = buflen >= 25 + p ? buffer[22+p] : 0;
981
982 if (buflen < 25 + p + 2*n) {
983 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
984 "interface %d EXTENSION_UNIT error\n",
985 udev->devnum, alts->desc.bInterfaceNumber);
986 break;
987 }
988
989 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
990 p + 1, 2*n);
991 if (unit == NULL)
992 return -ENOMEM;
993
994 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
995 unit->extension.bNumControls = buffer[20];
996 memcpy(unit->baSourceID, &buffer[22], p);
997 unit->extension.bControlSize = buffer[22+p];
998 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
999 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
1000 + n;
1001 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
1002
1003 if (buffer[24+p+2*n] != 0)
1004 usb_string(udev, buffer[24+p+2*n], unit->name,
1005 sizeof unit->name);
1006 else
1007 sprintf(unit->name, "Extension %u", buffer[3]);
1008
1009 list_add_tail(&unit->list, &dev->entities);
1010 handled = 1;
1011 break;
1012 }
1013
1014 return handled;
1015 }
1016
1017 static int uvc_parse_standard_control(struct uvc_device *dev,
1018 const unsigned char *buffer, int buflen)
1019 {
1020 struct usb_device *udev = dev->udev;
1021 struct uvc_entity *unit, *term;
1022 struct usb_interface *intf;
1023 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1024 unsigned int i, n, p, len;
1025 __u16 type;
1026
1027 switch (buffer[2]) {
1028 case UVC_VC_HEADER:
1029 n = buflen >= 12 ? buffer[11] : 0;
1030
1031 if (buflen < 12 + n) {
1032 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1033 "interface %d HEADER error\n", udev->devnum,
1034 alts->desc.bInterfaceNumber);
1035 return -EINVAL;
1036 }
1037
1038 dev->uvc_version = get_unaligned_le16(&buffer[3]);
1039 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
1040
1041 /* Parse all USB Video Streaming interfaces. */
1042 for (i = 0; i < n; ++i) {
1043 intf = usb_ifnum_to_if(udev, buffer[12+i]);
1044 if (intf == NULL) {
1045 uvc_trace(UVC_TRACE_DESCR, "device %d "
1046 "interface %d doesn't exists\n",
1047 udev->devnum, i);
1048 continue;
1049 }
1050
1051 uvc_parse_streaming(dev, intf);
1052 }
1053 break;
1054
1055 case UVC_VC_INPUT_TERMINAL:
1056 if (buflen < 8) {
1057 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1058 "interface %d INPUT_TERMINAL error\n",
1059 udev->devnum, alts->desc.bInterfaceNumber);
1060 return -EINVAL;
1061 }
1062
1063 /* Make sure the terminal type MSB is not null, otherwise it
1064 * could be confused with a unit.
1065 */
1066 type = get_unaligned_le16(&buffer[4]);
1067 if ((type & 0xff00) == 0) {
1068 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1069 "interface %d INPUT_TERMINAL %d has invalid "
1070 "type 0x%04x, skipping\n", udev->devnum,
1071 alts->desc.bInterfaceNumber,
1072 buffer[3], type);
1073 return 0;
1074 }
1075
1076 n = 0;
1077 p = 0;
1078 len = 8;
1079
1080 if (type == UVC_ITT_CAMERA) {
1081 n = buflen >= 15 ? buffer[14] : 0;
1082 len = 15;
1083
1084 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1085 n = buflen >= 9 ? buffer[8] : 0;
1086 p = buflen >= 10 + n ? buffer[9+n] : 0;
1087 len = 10;
1088 }
1089
1090 if (buflen < len + n + p) {
1091 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1092 "interface %d INPUT_TERMINAL error\n",
1093 udev->devnum, alts->desc.bInterfaceNumber);
1094 return -EINVAL;
1095 }
1096
1097 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1098 1, n + p);
1099 if (term == NULL)
1100 return -ENOMEM;
1101
1102 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1103 term->camera.bControlSize = n;
1104 term->camera.bmControls = (__u8 *)term + sizeof *term;
1105 term->camera.wObjectiveFocalLengthMin =
1106 get_unaligned_le16(&buffer[8]);
1107 term->camera.wObjectiveFocalLengthMax =
1108 get_unaligned_le16(&buffer[10]);
1109 term->camera.wOcularFocalLength =
1110 get_unaligned_le16(&buffer[12]);
1111 memcpy(term->camera.bmControls, &buffer[15], n);
1112 } else if (UVC_ENTITY_TYPE(term) ==
1113 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1114 term->media.bControlSize = n;
1115 term->media.bmControls = (__u8 *)term + sizeof *term;
1116 term->media.bTransportModeSize = p;
1117 term->media.bmTransportModes = (__u8 *)term
1118 + sizeof *term + n;
1119 memcpy(term->media.bmControls, &buffer[9], n);
1120 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1121 }
1122
1123 if (buffer[7] != 0)
1124 usb_string(udev, buffer[7], term->name,
1125 sizeof term->name);
1126 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1127 sprintf(term->name, "Camera %u", buffer[3]);
1128 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1129 sprintf(term->name, "Media %u", buffer[3]);
1130 else
1131 sprintf(term->name, "Input %u", buffer[3]);
1132
1133 list_add_tail(&term->list, &dev->entities);
1134 break;
1135
1136 case UVC_VC_OUTPUT_TERMINAL:
1137 if (buflen < 9) {
1138 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1139 "interface %d OUTPUT_TERMINAL error\n",
1140 udev->devnum, alts->desc.bInterfaceNumber);
1141 return -EINVAL;
1142 }
1143
1144 /* Make sure the terminal type MSB is not null, otherwise it
1145 * could be confused with a unit.
1146 */
1147 type = get_unaligned_le16(&buffer[4]);
1148 if ((type & 0xff00) == 0) {
1149 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1150 "interface %d OUTPUT_TERMINAL %d has invalid "
1151 "type 0x%04x, skipping\n", udev->devnum,
1152 alts->desc.bInterfaceNumber, buffer[3], type);
1153 return 0;
1154 }
1155
1156 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1157 1, 0);
1158 if (term == NULL)
1159 return -ENOMEM;
1160
1161 memcpy(term->baSourceID, &buffer[7], 1);
1162
1163 if (buffer[8] != 0)
1164 usb_string(udev, buffer[8], term->name,
1165 sizeof term->name);
1166 else
1167 sprintf(term->name, "Output %u", buffer[3]);
1168
1169 list_add_tail(&term->list, &dev->entities);
1170 break;
1171
1172 case UVC_VC_SELECTOR_UNIT:
1173 p = buflen >= 5 ? buffer[4] : 0;
1174
1175 if (buflen < 5 || buflen < 6 + p) {
1176 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1177 "interface %d SELECTOR_UNIT error\n",
1178 udev->devnum, alts->desc.bInterfaceNumber);
1179 return -EINVAL;
1180 }
1181
1182 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1183 if (unit == NULL)
1184 return -ENOMEM;
1185
1186 memcpy(unit->baSourceID, &buffer[5], p);
1187
1188 if (buffer[5+p] != 0)
1189 usb_string(udev, buffer[5+p], unit->name,
1190 sizeof unit->name);
1191 else
1192 sprintf(unit->name, "Selector %u", buffer[3]);
1193
1194 list_add_tail(&unit->list, &dev->entities);
1195 break;
1196
1197 case UVC_VC_PROCESSING_UNIT:
1198 n = buflen >= 8 ? buffer[7] : 0;
1199 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1200
1201 if (buflen < p + n) {
1202 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1203 "interface %d PROCESSING_UNIT error\n",
1204 udev->devnum, alts->desc.bInterfaceNumber);
1205 return -EINVAL;
1206 }
1207
1208 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1209 if (unit == NULL)
1210 return -ENOMEM;
1211
1212 memcpy(unit->baSourceID, &buffer[4], 1);
1213 unit->processing.wMaxMultiplier =
1214 get_unaligned_le16(&buffer[5]);
1215 unit->processing.bControlSize = buffer[7];
1216 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1217 memcpy(unit->processing.bmControls, &buffer[8], n);
1218 if (dev->uvc_version >= 0x0110)
1219 unit->processing.bmVideoStandards = buffer[9+n];
1220
1221 if (buffer[8+n] != 0)
1222 usb_string(udev, buffer[8+n], unit->name,
1223 sizeof unit->name);
1224 else
1225 sprintf(unit->name, "Processing %u", buffer[3]);
1226
1227 list_add_tail(&unit->list, &dev->entities);
1228 break;
1229
1230 case UVC_VC_EXTENSION_UNIT:
1231 p = buflen >= 22 ? buffer[21] : 0;
1232 n = buflen >= 24 + p ? buffer[22+p] : 0;
1233
1234 if (buflen < 24 + p + n) {
1235 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1236 "interface %d EXTENSION_UNIT error\n",
1237 udev->devnum, alts->desc.bInterfaceNumber);
1238 return -EINVAL;
1239 }
1240
1241 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1242 if (unit == NULL)
1243 return -ENOMEM;
1244
1245 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1246 unit->extension.bNumControls = buffer[20];
1247 memcpy(unit->baSourceID, &buffer[22], p);
1248 unit->extension.bControlSize = buffer[22+p];
1249 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
1250 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1251
1252 if (buffer[23+p+n] != 0)
1253 usb_string(udev, buffer[23+p+n], unit->name,
1254 sizeof unit->name);
1255 else
1256 sprintf(unit->name, "Extension %u", buffer[3]);
1257
1258 list_add_tail(&unit->list, &dev->entities);
1259 break;
1260
1261 default:
1262 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1263 "descriptor (%u)\n", buffer[2]);
1264 break;
1265 }
1266
1267 return 0;
1268 }
1269
1270 static int uvc_parse_control(struct uvc_device *dev)
1271 {
1272 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1273 unsigned char *buffer = alts->extra;
1274 int buflen = alts->extralen;
1275 int ret;
1276
1277 /* Parse the default alternate setting only, as the UVC specification
1278 * defines a single alternate setting, the default alternate setting
1279 * zero.
1280 */
1281
1282 while (buflen > 2) {
1283 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1284 buffer[1] != USB_DT_CS_INTERFACE)
1285 goto next_descriptor;
1286
1287 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1288 return ret;
1289
1290 next_descriptor:
1291 buflen -= buffer[0];
1292 buffer += buffer[0];
1293 }
1294
1295 /* Check if the optional status endpoint is present. Built-in iSight
1296 * webcams have an interrupt endpoint but spit proprietary data that
1297 * don't conform to the UVC status endpoint messages. Don't try to
1298 * handle the interrupt endpoint for those cameras.
1299 */
1300 if (alts->desc.bNumEndpoints == 1 &&
1301 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1302 struct usb_host_endpoint *ep = &alts->endpoint[0];
1303 struct usb_endpoint_descriptor *desc = &ep->desc;
1304
1305 if (usb_endpoint_is_int_in(desc) &&
1306 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1307 desc->bInterval != 0) {
1308 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1309 "(addr %02x).\n", desc->bEndpointAddress);
1310 dev->int_ep = ep;
1311 }
1312 }
1313
1314 return 0;
1315 }
1316
1317 /* ------------------------------------------------------------------------
1318 * UVC device scan
1319 */
1320
1321 /*
1322 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1323 * and containing the following units:
1324 *
1325 * - one or more Output Terminals (USB Streaming or Display)
1326 * - zero or one Processing Unit
1327 * - zero, one or more single-input Selector Units
1328 * - zero or one multiple-input Selector Units, provided all inputs are
1329 * connected to input terminals
1330 * - zero, one or mode single-input Extension Units
1331 * - one or more Input Terminals (Camera, External or USB Streaming)
1332 *
1333 * The terminal and units must match on of the following structures:
1334 *
1335 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1336 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1337 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1338 *
1339 * +---------+ +---------+ -> OTT_*(0)
1340 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1341 * +---------+ +---------+ -> OTT_*(n)
1342 *
1343 * The Processing Unit and Extension Units can be in any order. Additional
1344 * Extension Units connected to the main chain as single-unit branches are
1345 * also supported. Single-input Selector Units are ignored.
1346 */
1347 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1348 struct uvc_entity *entity)
1349 {
1350 switch (UVC_ENTITY_TYPE(entity)) {
1351 case UVC_VC_EXTENSION_UNIT:
1352 if (uvc_trace_param & UVC_TRACE_PROBE)
1353 printk(KERN_CONT " <- XU %d", entity->id);
1354
1355 if (entity->bNrInPins != 1) {
1356 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1357 "than 1 input pin.\n", entity->id);
1358 return -1;
1359 }
1360
1361 break;
1362
1363 case UVC_VC_PROCESSING_UNIT:
1364 if (uvc_trace_param & UVC_TRACE_PROBE)
1365 printk(KERN_CONT " <- PU %d", entity->id);
1366
1367 if (chain->processing != NULL) {
1368 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1369 "Processing Units in chain.\n");
1370 return -1;
1371 }
1372
1373 chain->processing = entity;
1374 break;
1375
1376 case UVC_VC_SELECTOR_UNIT:
1377 if (uvc_trace_param & UVC_TRACE_PROBE)
1378 printk(KERN_CONT " <- SU %d", entity->id);
1379
1380 /* Single-input selector units are ignored. */
1381 if (entity->bNrInPins == 1)
1382 break;
1383
1384 if (chain->selector != NULL) {
1385 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1386 "Units in chain.\n");
1387 return -1;
1388 }
1389
1390 chain->selector = entity;
1391 break;
1392
1393 case UVC_ITT_VENDOR_SPECIFIC:
1394 case UVC_ITT_CAMERA:
1395 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1396 if (uvc_trace_param & UVC_TRACE_PROBE)
1397 printk(KERN_CONT " <- IT %d\n", entity->id);
1398
1399 break;
1400
1401 case UVC_OTT_VENDOR_SPECIFIC:
1402 case UVC_OTT_DISPLAY:
1403 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1404 if (uvc_trace_param & UVC_TRACE_PROBE)
1405 printk(KERN_CONT " OT %d", entity->id);
1406
1407 break;
1408
1409 case UVC_TT_STREAMING:
1410 if (UVC_ENTITY_IS_ITERM(entity)) {
1411 if (uvc_trace_param & UVC_TRACE_PROBE)
1412 printk(KERN_CONT " <- IT %d\n", entity->id);
1413 } else {
1414 if (uvc_trace_param & UVC_TRACE_PROBE)
1415 printk(KERN_CONT " OT %d", entity->id);
1416 }
1417
1418 break;
1419
1420 default:
1421 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1422 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1423 return -1;
1424 }
1425
1426 list_add_tail(&entity->chain, &chain->entities);
1427 return 0;
1428 }
1429
1430 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1431 struct uvc_entity *entity, struct uvc_entity *prev)
1432 {
1433 struct uvc_entity *forward;
1434 int found;
1435
1436 /* Forward scan */
1437 forward = NULL;
1438 found = 0;
1439
1440 while (1) {
1441 forward = uvc_entity_by_reference(chain->dev, entity->id,
1442 forward);
1443 if (forward == NULL)
1444 break;
1445 if (forward == prev)
1446 continue;
1447
1448 switch (UVC_ENTITY_TYPE(forward)) {
1449 case UVC_VC_EXTENSION_UNIT:
1450 if (forward->bNrInPins != 1) {
1451 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1452 "has more than 1 input pin.\n",
1453 entity->id);
1454 return -EINVAL;
1455 }
1456
1457 list_add_tail(&forward->chain, &chain->entities);
1458 if (uvc_trace_param & UVC_TRACE_PROBE) {
1459 if (!found)
1460 printk(KERN_CONT " (->");
1461
1462 printk(KERN_CONT " XU %d", forward->id);
1463 found = 1;
1464 }
1465 break;
1466
1467 case UVC_OTT_VENDOR_SPECIFIC:
1468 case UVC_OTT_DISPLAY:
1469 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1470 case UVC_TT_STREAMING:
1471 if (UVC_ENTITY_IS_ITERM(forward)) {
1472 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1473 "terminal %u.\n", forward->id);
1474 return -EINVAL;
1475 }
1476
1477 list_add_tail(&forward->chain, &chain->entities);
1478 if (uvc_trace_param & UVC_TRACE_PROBE) {
1479 if (!found)
1480 printk(KERN_CONT " (->");
1481
1482 printk(KERN_CONT " OT %d", forward->id);
1483 found = 1;
1484 }
1485 break;
1486 }
1487 }
1488 if (found)
1489 printk(KERN_CONT ")");
1490
1491 return 0;
1492 }
1493
1494 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1495 struct uvc_entity **_entity)
1496 {
1497 struct uvc_entity *entity = *_entity;
1498 struct uvc_entity *term;
1499 int id = -EINVAL, i;
1500
1501 switch (UVC_ENTITY_TYPE(entity)) {
1502 case UVC_VC_EXTENSION_UNIT:
1503 case UVC_VC_PROCESSING_UNIT:
1504 id = entity->baSourceID[0];
1505 break;
1506
1507 case UVC_VC_SELECTOR_UNIT:
1508 /* Single-input selector units are ignored. */
1509 if (entity->bNrInPins == 1) {
1510 id = entity->baSourceID[0];
1511 break;
1512 }
1513
1514 if (uvc_trace_param & UVC_TRACE_PROBE)
1515 printk(KERN_CONT " <- IT");
1516
1517 chain->selector = entity;
1518 for (i = 0; i < entity->bNrInPins; ++i) {
1519 id = entity->baSourceID[i];
1520 term = uvc_entity_by_id(chain->dev, id);
1521 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1522 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1523 "input %d isn't connected to an "
1524 "input terminal\n", entity->id, i);
1525 return -1;
1526 }
1527
1528 if (uvc_trace_param & UVC_TRACE_PROBE)
1529 printk(KERN_CONT " %d", term->id);
1530
1531 list_add_tail(&term->chain, &chain->entities);
1532 uvc_scan_chain_forward(chain, term, entity);
1533 }
1534
1535 if (uvc_trace_param & UVC_TRACE_PROBE)
1536 printk(KERN_CONT "\n");
1537
1538 id = 0;
1539 break;
1540
1541 case UVC_ITT_VENDOR_SPECIFIC:
1542 case UVC_ITT_CAMERA:
1543 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1544 case UVC_OTT_VENDOR_SPECIFIC:
1545 case UVC_OTT_DISPLAY:
1546 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1547 case UVC_TT_STREAMING:
1548 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1549 break;
1550 }
1551
1552 if (id <= 0) {
1553 *_entity = NULL;
1554 return id;
1555 }
1556
1557 entity = uvc_entity_by_id(chain->dev, id);
1558 if (entity == NULL) {
1559 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1560 "unknown entity %d.\n", id);
1561 return -EINVAL;
1562 }
1563
1564 *_entity = entity;
1565 return 0;
1566 }
1567
1568 static int uvc_scan_chain(struct uvc_video_chain *chain,
1569 struct uvc_entity *term)
1570 {
1571 struct uvc_entity *entity, *prev;
1572
1573 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1574
1575 entity = term;
1576 prev = NULL;
1577
1578 while (entity != NULL) {
1579 /* Entity must not be part of an existing chain */
1580 if (entity->chain.next || entity->chain.prev) {
1581 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1582 "entity %d already in chain.\n", entity->id);
1583 return -EINVAL;
1584 }
1585
1586 /* Process entity */
1587 if (uvc_scan_chain_entity(chain, entity) < 0)
1588 return -EINVAL;
1589
1590 /* Forward scan */
1591 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1592 return -EINVAL;
1593
1594 /* Backward scan */
1595 prev = entity;
1596 if (uvc_scan_chain_backward(chain, &entity) < 0)
1597 return -EINVAL;
1598 }
1599
1600 return 0;
1601 }
1602
1603 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1604 char *buffer)
1605 {
1606 struct uvc_entity *term;
1607 unsigned int nterms = 0;
1608 char *p = buffer;
1609
1610 list_for_each_entry(term, terms, chain) {
1611 if (!UVC_ENTITY_IS_TERM(term) ||
1612 UVC_TERM_DIRECTION(term) != dir)
1613 continue;
1614
1615 if (nterms)
1616 p += sprintf(p, ",");
1617 if (++nterms >= 4) {
1618 p += sprintf(p, "...");
1619 break;
1620 }
1621 p += sprintf(p, "%u", term->id);
1622 }
1623
1624 return p - buffer;
1625 }
1626
1627 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1628 {
1629 static char buffer[43];
1630 char *p = buffer;
1631
1632 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1633 p += sprintf(p, " -> ");
1634 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1635
1636 return buffer;
1637 }
1638
1639 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1640 {
1641 struct uvc_video_chain *chain;
1642
1643 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1644 if (chain == NULL)
1645 return NULL;
1646
1647 INIT_LIST_HEAD(&chain->entities);
1648 mutex_init(&chain->ctrl_mutex);
1649 chain->dev = dev;
1650 v4l2_prio_init(&chain->prio);
1651
1652 return chain;
1653 }
1654
1655 /*
1656 * Fallback heuristic for devices that don't connect units and terminals in a
1657 * valid chain.
1658 *
1659 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1660 * to fail, but if we just take the entities we can find and put them together
1661 * in the most sensible chain we can think of, turns out they do work anyway.
1662 * Note: This heuristic assumes there is a single chain.
1663 *
1664 * At the time of writing, devices known to have such a broken chain are
1665 * - Acer Integrated Camera (5986:055a)
1666 * - Realtek rtl157a7 (0bda:57a7)
1667 */
1668 static int uvc_scan_fallback(struct uvc_device *dev)
1669 {
1670 struct uvc_video_chain *chain;
1671 struct uvc_entity *iterm = NULL;
1672 struct uvc_entity *oterm = NULL;
1673 struct uvc_entity *entity;
1674 struct uvc_entity *prev;
1675
1676 /*
1677 * Start by locating the input and output terminals. We only support
1678 * devices with exactly one of each for now.
1679 */
1680 list_for_each_entry(entity, &dev->entities, list) {
1681 if (UVC_ENTITY_IS_ITERM(entity)) {
1682 if (iterm)
1683 return -EINVAL;
1684 iterm = entity;
1685 }
1686
1687 if (UVC_ENTITY_IS_OTERM(entity)) {
1688 if (oterm)
1689 return -EINVAL;
1690 oterm = entity;
1691 }
1692 }
1693
1694 if (iterm == NULL || oterm == NULL)
1695 return -EINVAL;
1696
1697 /* Allocate the chain and fill it. */
1698 chain = uvc_alloc_chain(dev);
1699 if (chain == NULL)
1700 return -ENOMEM;
1701
1702 if (uvc_scan_chain_entity(chain, oterm) < 0)
1703 goto error;
1704
1705 prev = oterm;
1706
1707 /*
1708 * Add all Processing and Extension Units with two pads. The order
1709 * doesn't matter much, use reverse list traversal to connect units in
1710 * UVC descriptor order as we build the chain from output to input. This
1711 * leads to units appearing in the order meant by the manufacturer for
1712 * the cameras known to require this heuristic.
1713 */
1714 list_for_each_entry_reverse(entity, &dev->entities, list) {
1715 if (entity->type != UVC_VC_PROCESSING_UNIT &&
1716 entity->type != UVC_VC_EXTENSION_UNIT)
1717 continue;
1718
1719 if (entity->num_pads != 2)
1720 continue;
1721
1722 if (uvc_scan_chain_entity(chain, entity) < 0)
1723 goto error;
1724
1725 prev->baSourceID[0] = entity->id;
1726 prev = entity;
1727 }
1728
1729 if (uvc_scan_chain_entity(chain, iterm) < 0)
1730 goto error;
1731
1732 prev->baSourceID[0] = iterm->id;
1733
1734 list_add_tail(&chain->list, &dev->chains);
1735
1736 uvc_trace(UVC_TRACE_PROBE,
1737 "Found a video chain by fallback heuristic (%s).\n",
1738 uvc_print_chain(chain));
1739
1740 return 0;
1741
1742 error:
1743 kfree(chain);
1744 return -EINVAL;
1745 }
1746
1747 /*
1748 * Scan the device for video chains and register video devices.
1749 *
1750 * Chains are scanned starting at their output terminals and walked backwards.
1751 */
1752 static int uvc_scan_device(struct uvc_device *dev)
1753 {
1754 struct uvc_video_chain *chain;
1755 struct uvc_entity *term;
1756
1757 list_for_each_entry(term, &dev->entities, list) {
1758 if (!UVC_ENTITY_IS_OTERM(term))
1759 continue;
1760
1761 /* If the terminal is already included in a chain, skip it.
1762 * This can happen for chains that have multiple output
1763 * terminals, where all output terminals beside the first one
1764 * will be inserted in the chain in forward scans.
1765 */
1766 if (term->chain.next || term->chain.prev)
1767 continue;
1768
1769 chain = uvc_alloc_chain(dev);
1770 if (chain == NULL)
1771 return -ENOMEM;
1772
1773 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1774
1775 if (uvc_scan_chain(chain, term) < 0) {
1776 kfree(chain);
1777 continue;
1778 }
1779
1780 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1781 uvc_print_chain(chain));
1782
1783 list_add_tail(&chain->list, &dev->chains);
1784 }
1785
1786 if (list_empty(&dev->chains))
1787 uvc_scan_fallback(dev);
1788
1789 if (list_empty(&dev->chains)) {
1790 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1791 return -1;
1792 }
1793
1794 return 0;
1795 }
1796
1797 /* ------------------------------------------------------------------------
1798 * Video device registration and unregistration
1799 */
1800
1801 /*
1802 * Delete the UVC device.
1803 *
1804 * Called by the kernel when the last reference to the uvc_device structure
1805 * is released.
1806 *
1807 * As this function is called after or during disconnect(), all URBs have
1808 * already been canceled by the USB core. There is no need to kill the
1809 * interrupt URB manually.
1810 */
1811 static void uvc_delete(struct kref *kref)
1812 {
1813 struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
1814 struct list_head *p, *n;
1815
1816 uvc_status_cleanup(dev);
1817 uvc_ctrl_cleanup_device(dev);
1818
1819 usb_put_intf(dev->intf);
1820 usb_put_dev(dev->udev);
1821
1822 if (dev->vdev.dev)
1823 v4l2_device_unregister(&dev->vdev);
1824 #ifdef CONFIG_MEDIA_CONTROLLER
1825 if (media_devnode_is_registered(dev->mdev.devnode))
1826 media_device_unregister(&dev->mdev);
1827 media_device_cleanup(&dev->mdev);
1828 #endif
1829
1830 list_for_each_safe(p, n, &dev->chains) {
1831 struct uvc_video_chain *chain;
1832 chain = list_entry(p, struct uvc_video_chain, list);
1833 kfree(chain);
1834 }
1835
1836 list_for_each_safe(p, n, &dev->entities) {
1837 struct uvc_entity *entity;
1838 entity = list_entry(p, struct uvc_entity, list);
1839 #ifdef CONFIG_MEDIA_CONTROLLER
1840 uvc_mc_cleanup_entity(entity);
1841 #endif
1842 kfree(entity);
1843 }
1844
1845 list_for_each_safe(p, n, &dev->streams) {
1846 struct uvc_streaming *streaming;
1847 streaming = list_entry(p, struct uvc_streaming, list);
1848 usb_driver_release_interface(&uvc_driver.driver,
1849 streaming->intf);
1850 usb_put_intf(streaming->intf);
1851 kfree(streaming->format);
1852 kfree(streaming->header.bmaControls);
1853 kfree(streaming);
1854 }
1855
1856 kfree(dev);
1857 }
1858
1859 static void uvc_release(struct video_device *vdev)
1860 {
1861 struct uvc_streaming *stream = video_get_drvdata(vdev);
1862 struct uvc_device *dev = stream->dev;
1863
1864 kref_put(&dev->ref, uvc_delete);
1865 }
1866
1867 /*
1868 * Unregister the video devices.
1869 */
1870 static void uvc_unregister_video(struct uvc_device *dev)
1871 {
1872 struct uvc_streaming *stream;
1873
1874 /* Unregistering all video devices might result in uvc_delete() being
1875 * called from inside the loop if there's no open file handle. To avoid
1876 * that, increment the refcount before iterating over the streams and
1877 * decrement it when done.
1878 */
1879 kref_get(&dev->ref);
1880
1881 list_for_each_entry(stream, &dev->streams, list) {
1882 if (!video_is_registered(&stream->vdev))
1883 continue;
1884
1885 video_unregister_device(&stream->vdev);
1886 video_unregister_device(&stream->meta.vdev);
1887
1888 uvc_debugfs_cleanup_stream(stream);
1889 }
1890
1891 kref_put(&dev->ref, uvc_delete);
1892 }
1893
1894 int uvc_register_video_device(struct uvc_device *dev,
1895 struct uvc_streaming *stream,
1896 struct video_device *vdev,
1897 struct uvc_video_queue *queue,
1898 enum v4l2_buf_type type,
1899 const struct v4l2_file_operations *fops,
1900 const struct v4l2_ioctl_ops *ioctl_ops)
1901 {
1902 int ret;
1903
1904 /* Initialize the video buffers queue. */
1905 ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
1906 if (ret)
1907 return ret;
1908
1909 /* Register the device with V4L. */
1910
1911 /*
1912 * We already hold a reference to dev->udev. The video device will be
1913 * unregistered before the reference is released, so we don't need to
1914 * get another one.
1915 */
1916 vdev->v4l2_dev = &dev->vdev;
1917 vdev->fops = fops;
1918 vdev->ioctl_ops = ioctl_ops;
1919 vdev->release = uvc_release;
1920 vdev->prio = &stream->chain->prio;
1921 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1922 vdev->vfl_dir = VFL_DIR_TX;
1923 else
1924 vdev->vfl_dir = VFL_DIR_RX;
1925
1926 switch (type) {
1927 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1928 default:
1929 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1930 break;
1931 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1932 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
1933 break;
1934 case V4L2_BUF_TYPE_META_CAPTURE:
1935 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
1936 break;
1937 }
1938
1939 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1940
1941 /*
1942 * Set the driver data before calling video_register_device, otherwise
1943 * the file open() handler might race us.
1944 */
1945 video_set_drvdata(vdev, stream);
1946
1947 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1948 if (ret < 0) {
1949 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
1950 v4l2_type_names[type], ret);
1951 return ret;
1952 }
1953
1954 kref_get(&dev->ref);
1955 return 0;
1956 }
1957
1958 static int uvc_register_video(struct uvc_device *dev,
1959 struct uvc_streaming *stream)
1960 {
1961 int ret;
1962
1963 /* Initialize the streaming interface with default parameters. */
1964 ret = uvc_video_init(stream);
1965 if (ret < 0) {
1966 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
1967 ret);
1968 return ret;
1969 }
1970
1971 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1972 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
1973 | V4L2_CAP_META_CAPTURE;
1974 else
1975 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1976
1977 uvc_debugfs_init_stream(stream);
1978
1979 /* Register the device with V4L. */
1980 return uvc_register_video_device(dev, stream, &stream->vdev,
1981 &stream->queue, stream->type,
1982 &uvc_fops, &uvc_ioctl_ops);
1983 }
1984
1985 /*
1986 * Register all video devices in all chains.
1987 */
1988 static int uvc_register_terms(struct uvc_device *dev,
1989 struct uvc_video_chain *chain)
1990 {
1991 struct uvc_streaming *stream;
1992 struct uvc_entity *term;
1993 int ret;
1994
1995 list_for_each_entry(term, &chain->entities, chain) {
1996 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1997 continue;
1998
1999 stream = uvc_stream_by_id(dev, term->id);
2000 if (stream == NULL) {
2001 uvc_printk(KERN_INFO, "No streaming interface found "
2002 "for terminal %u.", term->id);
2003 continue;
2004 }
2005
2006 stream->chain = chain;
2007 ret = uvc_register_video(dev, stream);
2008 if (ret < 0)
2009 return ret;
2010
2011 /* Register a metadata node, but ignore a possible failure,
2012 * complete registration of video nodes anyway.
2013 */
2014 uvc_meta_register(stream);
2015
2016 term->vdev = &stream->vdev;
2017 }
2018
2019 return 0;
2020 }
2021
2022 static int uvc_register_chains(struct uvc_device *dev)
2023 {
2024 struct uvc_video_chain *chain;
2025 int ret;
2026
2027 list_for_each_entry(chain, &dev->chains, list) {
2028 ret = uvc_register_terms(dev, chain);
2029 if (ret < 0)
2030 return ret;
2031
2032 #ifdef CONFIG_MEDIA_CONTROLLER
2033 ret = uvc_mc_register_entities(chain);
2034 if (ret < 0) {
2035 uvc_printk(KERN_INFO, "Failed to register entites "
2036 "(%d).\n", ret);
2037 }
2038 #endif
2039 }
2040
2041 return 0;
2042 }
2043
2044 /* ------------------------------------------------------------------------
2045 * USB probe, disconnect, suspend and resume
2046 */
2047
2048 struct uvc_device_info {
2049 u32 quirks;
2050 u32 meta_format;
2051 };
2052
2053 static int uvc_probe(struct usb_interface *intf,
2054 const struct usb_device_id *id)
2055 {
2056 struct usb_device *udev = interface_to_usbdev(intf);
2057 struct uvc_device *dev;
2058 const struct uvc_device_info *info =
2059 (const struct uvc_device_info *)id->driver_info;
2060 u32 quirks = info ? info->quirks : 0;
2061 int function;
2062 int ret;
2063
2064 if (id->idVendor && id->idProduct)
2065 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
2066 "(%04x:%04x)\n", udev->devpath, id->idVendor,
2067 id->idProduct);
2068 else
2069 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
2070 udev->devpath);
2071
2072 /* Allocate memory for the device and initialize it. */
2073 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
2074 return -ENOMEM;
2075
2076 INIT_LIST_HEAD(&dev->entities);
2077 INIT_LIST_HEAD(&dev->chains);
2078 INIT_LIST_HEAD(&dev->streams);
2079 kref_init(&dev->ref);
2080 atomic_set(&dev->nmappings, 0);
2081 mutex_init(&dev->lock);
2082
2083 dev->udev = usb_get_dev(udev);
2084 dev->intf = usb_get_intf(intf);
2085 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
2086 dev->quirks = (uvc_quirks_param == -1)
2087 ? quirks : uvc_quirks_param;
2088 if (info)
2089 dev->meta_format = info->meta_format;
2090
2091 if (udev->product != NULL)
2092 strlcpy(dev->name, udev->product, sizeof dev->name);
2093 else
2094 snprintf(dev->name, sizeof dev->name,
2095 "UVC Camera (%04x:%04x)",
2096 le16_to_cpu(udev->descriptor.idVendor),
2097 le16_to_cpu(udev->descriptor.idProduct));
2098
2099 /*
2100 * Add iFunction or iInterface to names when available as additional
2101 * distinguishers between interfaces. iFunction is prioritized over
2102 * iInterface which matches Windows behavior at the point of writing.
2103 */
2104 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
2105 function = intf->intf_assoc->iFunction;
2106 else
2107 function = intf->cur_altsetting->desc.iInterface;
2108 if (function != 0) {
2109 size_t len;
2110
2111 strlcat(dev->name, ": ", sizeof(dev->name));
2112 len = strlen(dev->name);
2113 usb_string(udev, function, dev->name + len,
2114 sizeof(dev->name) - len);
2115 }
2116
2117 /* Parse the Video Class control descriptor. */
2118 if (uvc_parse_control(dev) < 0) {
2119 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
2120 "descriptors.\n");
2121 goto error;
2122 }
2123
2124 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2125 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2126 udev->product ? udev->product : "<unnamed>",
2127 le16_to_cpu(udev->descriptor.idVendor),
2128 le16_to_cpu(udev->descriptor.idProduct));
2129
2130 if (dev->quirks != quirks) {
2131 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
2132 "parameter for testing purpose.\n", dev->quirks);
2133 uvc_printk(KERN_INFO, "Please report required quirks to the "
2134 "linux-uvc-devel mailing list.\n");
2135 }
2136
2137 /* Initialize the media device and register the V4L2 device. */
2138 #ifdef CONFIG_MEDIA_CONTROLLER
2139 dev->mdev.dev = &intf->dev;
2140 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
2141 if (udev->serial)
2142 strlcpy(dev->mdev.serial, udev->serial,
2143 sizeof(dev->mdev.serial));
2144 strcpy(dev->mdev.bus_info, udev->devpath);
2145 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
2146 media_device_init(&dev->mdev);
2147
2148 dev->vdev.mdev = &dev->mdev;
2149 #endif
2150 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2151 goto error;
2152
2153 /* Initialize controls. */
2154 if (uvc_ctrl_init_device(dev) < 0)
2155 goto error;
2156
2157 /* Scan the device for video chains. */
2158 if (uvc_scan_device(dev) < 0)
2159 goto error;
2160
2161 /* Register video device nodes. */
2162 if (uvc_register_chains(dev) < 0)
2163 goto error;
2164
2165 #ifdef CONFIG_MEDIA_CONTROLLER
2166 /* Register the media device node */
2167 if (media_device_register(&dev->mdev) < 0)
2168 goto error;
2169 #endif
2170 /* Save our data pointer in the interface data. */
2171 usb_set_intfdata(intf, dev);
2172
2173 /* Initialize the interrupt URB. */
2174 if ((ret = uvc_status_init(dev)) < 0) {
2175 uvc_printk(KERN_INFO, "Unable to initialize the status "
2176 "endpoint (%d), status interrupt will not be "
2177 "supported.\n", ret);
2178 }
2179
2180 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
2181 usb_enable_autosuspend(udev);
2182 return 0;
2183
2184 error:
2185 uvc_unregister_video(dev);
2186 return -ENODEV;
2187 }
2188
2189 static void uvc_disconnect(struct usb_interface *intf)
2190 {
2191 struct uvc_device *dev = usb_get_intfdata(intf);
2192
2193 /* Set the USB interface data to NULL. This can be done outside the
2194 * lock, as there's no other reader.
2195 */
2196 usb_set_intfdata(intf, NULL);
2197
2198 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2199 UVC_SC_VIDEOSTREAMING)
2200 return;
2201
2202 uvc_unregister_video(dev);
2203 }
2204
2205 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2206 {
2207 struct uvc_device *dev = usb_get_intfdata(intf);
2208 struct uvc_streaming *stream;
2209
2210 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
2211 intf->cur_altsetting->desc.bInterfaceNumber);
2212
2213 /* Controls are cached on the fly so they don't need to be saved. */
2214 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2215 UVC_SC_VIDEOCONTROL) {
2216 mutex_lock(&dev->lock);
2217 if (dev->users)
2218 uvc_status_stop(dev);
2219 mutex_unlock(&dev->lock);
2220 return 0;
2221 }
2222
2223 list_for_each_entry(stream, &dev->streams, list) {
2224 if (stream->intf == intf)
2225 return uvc_video_suspend(stream);
2226 }
2227
2228 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2229 "mismatch.\n");
2230 return -EINVAL;
2231 }
2232
2233 static int __uvc_resume(struct usb_interface *intf, int reset)
2234 {
2235 struct uvc_device *dev = usb_get_intfdata(intf);
2236 struct uvc_streaming *stream;
2237 int ret = 0;
2238
2239 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2240 intf->cur_altsetting->desc.bInterfaceNumber);
2241
2242 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2243 UVC_SC_VIDEOCONTROL) {
2244 if (reset) {
2245 ret = uvc_ctrl_restore_values(dev);
2246 if (ret < 0)
2247 return ret;
2248 }
2249
2250 mutex_lock(&dev->lock);
2251 if (dev->users)
2252 ret = uvc_status_start(dev, GFP_NOIO);
2253 mutex_unlock(&dev->lock);
2254
2255 return ret;
2256 }
2257
2258 list_for_each_entry(stream, &dev->streams, list) {
2259 if (stream->intf == intf) {
2260 ret = uvc_video_resume(stream, reset);
2261 if (ret < 0)
2262 uvc_queue_streamoff(&stream->queue,
2263 stream->queue.queue.type);
2264 return ret;
2265 }
2266 }
2267
2268 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2269 "mismatch.\n");
2270 return -EINVAL;
2271 }
2272
2273 static int uvc_resume(struct usb_interface *intf)
2274 {
2275 return __uvc_resume(intf, 0);
2276 }
2277
2278 static int uvc_reset_resume(struct usb_interface *intf)
2279 {
2280 return __uvc_resume(intf, 1);
2281 }
2282
2283 /* ------------------------------------------------------------------------
2284 * Module parameters
2285 */
2286
2287 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
2288 {
2289 if (uvc_clock_param == CLOCK_MONOTONIC)
2290 return sprintf(buffer, "CLOCK_MONOTONIC");
2291 else
2292 return sprintf(buffer, "CLOCK_REALTIME");
2293 }
2294
2295 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
2296 {
2297 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2298 val += strlen("clock_");
2299
2300 if (strcasecmp(val, "monotonic") == 0)
2301 uvc_clock_param = CLOCK_MONOTONIC;
2302 else if (strcasecmp(val, "realtime") == 0)
2303 uvc_clock_param = CLOCK_REALTIME;
2304 else
2305 return -EINVAL;
2306
2307 return 0;
2308 }
2309
2310 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2311 &uvc_clock_param, S_IRUGO|S_IWUSR);
2312 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2313 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2314 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2315 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2316 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2317 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2318 MODULE_PARM_DESC(quirks, "Forced device quirks");
2319 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2320 MODULE_PARM_DESC(trace, "Trace level bitmask");
2321 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2322 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2323
2324 /* ------------------------------------------------------------------------
2325 * Driver initialization and cleanup
2326 */
2327
2328 static const struct uvc_device_info uvc_quirk_probe_minmax = {
2329 .quirks = UVC_QUIRK_PROBE_MINMAX,
2330 };
2331
2332 static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
2333 .quirks = UVC_QUIRK_FIX_BANDWIDTH,
2334 };
2335
2336 static const struct uvc_device_info uvc_quirk_probe_def = {
2337 .quirks = UVC_QUIRK_PROBE_DEF,
2338 };
2339
2340 static const struct uvc_device_info uvc_quirk_stream_no_fid = {
2341 .quirks = UVC_QUIRK_STREAM_NO_FID,
2342 };
2343
2344 static const struct uvc_device_info uvc_quirk_force_y8 = {
2345 .quirks = UVC_QUIRK_FORCE_Y8,
2346 };
2347
2348 #define UVC_QUIRK_INFO(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
2349
2350 /*
2351 * The Logitech cameras listed below have their interface class set to
2352 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2353 * though they are compliant.
2354 */
2355 static const struct usb_device_id uvc_ids[] = {
2356 /* LogiLink Wireless Webcam */
2357 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2358 | USB_DEVICE_ID_MATCH_INT_INFO,
2359 .idVendor = 0x0416,
2360 .idProduct = 0xa91a,
2361 .bInterfaceClass = USB_CLASS_VIDEO,
2362 .bInterfaceSubClass = 1,
2363 .bInterfaceProtocol = 0,
2364 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2365 /* Genius eFace 2025 */
2366 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2367 | USB_DEVICE_ID_MATCH_INT_INFO,
2368 .idVendor = 0x0458,
2369 .idProduct = 0x706e,
2370 .bInterfaceClass = USB_CLASS_VIDEO,
2371 .bInterfaceSubClass = 1,
2372 .bInterfaceProtocol = 0,
2373 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2374 /* Microsoft Lifecam NX-6000 */
2375 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2376 | USB_DEVICE_ID_MATCH_INT_INFO,
2377 .idVendor = 0x045e,
2378 .idProduct = 0x00f8,
2379 .bInterfaceClass = USB_CLASS_VIDEO,
2380 .bInterfaceSubClass = 1,
2381 .bInterfaceProtocol = 0,
2382 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2383 /* Microsoft Lifecam NX-3000 */
2384 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2385 | USB_DEVICE_ID_MATCH_INT_INFO,
2386 .idVendor = 0x045e,
2387 .idProduct = 0x0721,
2388 .bInterfaceClass = USB_CLASS_VIDEO,
2389 .bInterfaceSubClass = 1,
2390 .bInterfaceProtocol = 0,
2391 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2392 /* Microsoft Lifecam VX-7000 */
2393 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2394 | USB_DEVICE_ID_MATCH_INT_INFO,
2395 .idVendor = 0x045e,
2396 .idProduct = 0x0723,
2397 .bInterfaceClass = USB_CLASS_VIDEO,
2398 .bInterfaceSubClass = 1,
2399 .bInterfaceProtocol = 0,
2400 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2401 /* Logitech Quickcam Fusion */
2402 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2403 | USB_DEVICE_ID_MATCH_INT_INFO,
2404 .idVendor = 0x046d,
2405 .idProduct = 0x08c1,
2406 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2407 .bInterfaceSubClass = 1,
2408 .bInterfaceProtocol = 0 },
2409 /* Logitech Quickcam Orbit MP */
2410 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2411 | USB_DEVICE_ID_MATCH_INT_INFO,
2412 .idVendor = 0x046d,
2413 .idProduct = 0x08c2,
2414 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2415 .bInterfaceSubClass = 1,
2416 .bInterfaceProtocol = 0 },
2417 /* Logitech Quickcam Pro for Notebook */
2418 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2419 | USB_DEVICE_ID_MATCH_INT_INFO,
2420 .idVendor = 0x046d,
2421 .idProduct = 0x08c3,
2422 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2423 .bInterfaceSubClass = 1,
2424 .bInterfaceProtocol = 0 },
2425 /* Logitech Quickcam Pro 5000 */
2426 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2427 | USB_DEVICE_ID_MATCH_INT_INFO,
2428 .idVendor = 0x046d,
2429 .idProduct = 0x08c5,
2430 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2431 .bInterfaceSubClass = 1,
2432 .bInterfaceProtocol = 0 },
2433 /* Logitech Quickcam OEM Dell Notebook */
2434 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2435 | USB_DEVICE_ID_MATCH_INT_INFO,
2436 .idVendor = 0x046d,
2437 .idProduct = 0x08c6,
2438 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2439 .bInterfaceSubClass = 1,
2440 .bInterfaceProtocol = 0 },
2441 /* Logitech Quickcam OEM Cisco VT Camera II */
2442 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2443 | USB_DEVICE_ID_MATCH_INT_INFO,
2444 .idVendor = 0x046d,
2445 .idProduct = 0x08c7,
2446 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2447 .bInterfaceSubClass = 1,
2448 .bInterfaceProtocol = 0 },
2449 /* Logitech HD Pro Webcam C920 */
2450 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2451 | USB_DEVICE_ID_MATCH_INT_INFO,
2452 .idVendor = 0x046d,
2453 .idProduct = 0x082d,
2454 .bInterfaceClass = USB_CLASS_VIDEO,
2455 .bInterfaceSubClass = 1,
2456 .bInterfaceProtocol = 0,
2457 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
2458 /* Chicony CNF7129 (Asus EEE 100HE) */
2459 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2460 | USB_DEVICE_ID_MATCH_INT_INFO,
2461 .idVendor = 0x04f2,
2462 .idProduct = 0xb071,
2463 .bInterfaceClass = USB_CLASS_VIDEO,
2464 .bInterfaceSubClass = 1,
2465 .bInterfaceProtocol = 0,
2466 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTRICT_FRAME_RATE) },
2467 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2468 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2469 | USB_DEVICE_ID_MATCH_INT_INFO,
2470 .idVendor = 0x058f,
2471 .idProduct = 0x3820,
2472 .bInterfaceClass = USB_CLASS_VIDEO,
2473 .bInterfaceSubClass = 1,
2474 .bInterfaceProtocol = 0,
2475 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2476 /* Dell XPS m1530 */
2477 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2478 | USB_DEVICE_ID_MATCH_INT_INFO,
2479 .idVendor = 0x05a9,
2480 .idProduct = 0x2640,
2481 .bInterfaceClass = USB_CLASS_VIDEO,
2482 .bInterfaceSubClass = 1,
2483 .bInterfaceProtocol = 0,
2484 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2485 /* Dell SP2008WFP Monitor */
2486 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2487 | USB_DEVICE_ID_MATCH_INT_INFO,
2488 .idVendor = 0x05a9,
2489 .idProduct = 0x2641,
2490 .bInterfaceClass = USB_CLASS_VIDEO,
2491 .bInterfaceSubClass = 1,
2492 .bInterfaceProtocol = 0,
2493 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2494 /* Dell Alienware X51 */
2495 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2496 | USB_DEVICE_ID_MATCH_INT_INFO,
2497 .idVendor = 0x05a9,
2498 .idProduct = 0x2643,
2499 .bInterfaceClass = USB_CLASS_VIDEO,
2500 .bInterfaceSubClass = 1,
2501 .bInterfaceProtocol = 0,
2502 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2503 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2504 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2505 | USB_DEVICE_ID_MATCH_INT_INFO,
2506 .idVendor = 0x05a9,
2507 .idProduct = 0x264a,
2508 .bInterfaceClass = USB_CLASS_VIDEO,
2509 .bInterfaceSubClass = 1,
2510 .bInterfaceProtocol = 0,
2511 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2512 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2513 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2514 | USB_DEVICE_ID_MATCH_INT_INFO,
2515 .idVendor = 0x05a9,
2516 .idProduct = 0x7670,
2517 .bInterfaceClass = USB_CLASS_VIDEO,
2518 .bInterfaceSubClass = 1,
2519 .bInterfaceProtocol = 0,
2520 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2521 /* Apple Built-In iSight */
2522 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2523 | USB_DEVICE_ID_MATCH_INT_INFO,
2524 .idVendor = 0x05ac,
2525 .idProduct = 0x8501,
2526 .bInterfaceClass = USB_CLASS_VIDEO,
2527 .bInterfaceSubClass = 1,
2528 .bInterfaceProtocol = 0,
2529 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2530 | UVC_QUIRK_BUILTIN_ISIGHT) },
2531 /* Apple Built-In iSight via iBridge */
2532 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2533 | USB_DEVICE_ID_MATCH_INT_INFO,
2534 .idVendor = 0x05ac,
2535 .idProduct = 0x8600,
2536 .bInterfaceClass = USB_CLASS_VIDEO,
2537 .bInterfaceSubClass = 1,
2538 .bInterfaceProtocol = 0,
2539 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2540 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2541 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2542 | USB_DEVICE_ID_MATCH_INT_INFO,
2543 .idVendor = 0x05c8,
2544 .idProduct = 0x0403,
2545 .bInterfaceClass = USB_CLASS_VIDEO,
2546 .bInterfaceSubClass = 1,
2547 .bInterfaceProtocol = 0,
2548 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2549 /* Genesys Logic USB 2.0 PC Camera */
2550 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2551 | USB_DEVICE_ID_MATCH_INT_INFO,
2552 .idVendor = 0x05e3,
2553 .idProduct = 0x0505,
2554 .bInterfaceClass = USB_CLASS_VIDEO,
2555 .bInterfaceSubClass = 1,
2556 .bInterfaceProtocol = 0,
2557 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2558 /* Hercules Classic Silver */
2559 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2560 | USB_DEVICE_ID_MATCH_INT_INFO,
2561 .idVendor = 0x06f8,
2562 .idProduct = 0x300c,
2563 .bInterfaceClass = USB_CLASS_VIDEO,
2564 .bInterfaceSubClass = 1,
2565 .bInterfaceProtocol = 0,
2566 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2567 /* ViMicro Vega */
2568 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2569 | USB_DEVICE_ID_MATCH_INT_INFO,
2570 .idVendor = 0x0ac8,
2571 .idProduct = 0x332d,
2572 .bInterfaceClass = USB_CLASS_VIDEO,
2573 .bInterfaceSubClass = 1,
2574 .bInterfaceProtocol = 0,
2575 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2576 /* ViMicro - Minoru3D */
2577 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2578 | USB_DEVICE_ID_MATCH_INT_INFO,
2579 .idVendor = 0x0ac8,
2580 .idProduct = 0x3410,
2581 .bInterfaceClass = USB_CLASS_VIDEO,
2582 .bInterfaceSubClass = 1,
2583 .bInterfaceProtocol = 0,
2584 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2585 /* ViMicro Venus - Minoru3D */
2586 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2587 | USB_DEVICE_ID_MATCH_INT_INFO,
2588 .idVendor = 0x0ac8,
2589 .idProduct = 0x3420,
2590 .bInterfaceClass = USB_CLASS_VIDEO,
2591 .bInterfaceSubClass = 1,
2592 .bInterfaceProtocol = 0,
2593 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2594 /* Ophir Optronics - SPCAM 620U */
2595 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2596 | USB_DEVICE_ID_MATCH_INT_INFO,
2597 .idVendor = 0x0bd3,
2598 .idProduct = 0x0555,
2599 .bInterfaceClass = USB_CLASS_VIDEO,
2600 .bInterfaceSubClass = 1,
2601 .bInterfaceProtocol = 0,
2602 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2603 /* MT6227 */
2604 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2605 | USB_DEVICE_ID_MATCH_INT_INFO,
2606 .idVendor = 0x0e8d,
2607 .idProduct = 0x0004,
2608 .bInterfaceClass = USB_CLASS_VIDEO,
2609 .bInterfaceSubClass = 1,
2610 .bInterfaceProtocol = 0,
2611 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2612 | UVC_QUIRK_PROBE_DEF) },
2613 /* IMC Networks (Medion Akoya) */
2614 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2615 | USB_DEVICE_ID_MATCH_INT_INFO,
2616 .idVendor = 0x13d3,
2617 .idProduct = 0x5103,
2618 .bInterfaceClass = USB_CLASS_VIDEO,
2619 .bInterfaceSubClass = 1,
2620 .bInterfaceProtocol = 0,
2621 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2622 /* JMicron USB2.0 XGA WebCam */
2623 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2624 | USB_DEVICE_ID_MATCH_INT_INFO,
2625 .idVendor = 0x152d,
2626 .idProduct = 0x0310,
2627 .bInterfaceClass = USB_CLASS_VIDEO,
2628 .bInterfaceSubClass = 1,
2629 .bInterfaceProtocol = 0,
2630 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2631 /* Syntek (HP Spartan) */
2632 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2633 | USB_DEVICE_ID_MATCH_INT_INFO,
2634 .idVendor = 0x174f,
2635 .idProduct = 0x5212,
2636 .bInterfaceClass = USB_CLASS_VIDEO,
2637 .bInterfaceSubClass = 1,
2638 .bInterfaceProtocol = 0,
2639 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2640 /* Syntek (Samsung Q310) */
2641 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2642 | USB_DEVICE_ID_MATCH_INT_INFO,
2643 .idVendor = 0x174f,
2644 .idProduct = 0x5931,
2645 .bInterfaceClass = USB_CLASS_VIDEO,
2646 .bInterfaceSubClass = 1,
2647 .bInterfaceProtocol = 0,
2648 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2649 /* Syntek (Packard Bell EasyNote MX52 */
2650 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2651 | USB_DEVICE_ID_MATCH_INT_INFO,
2652 .idVendor = 0x174f,
2653 .idProduct = 0x8a12,
2654 .bInterfaceClass = USB_CLASS_VIDEO,
2655 .bInterfaceSubClass = 1,
2656 .bInterfaceProtocol = 0,
2657 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2658 /* Syntek (Asus F9SG) */
2659 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2660 | USB_DEVICE_ID_MATCH_INT_INFO,
2661 .idVendor = 0x174f,
2662 .idProduct = 0x8a31,
2663 .bInterfaceClass = USB_CLASS_VIDEO,
2664 .bInterfaceSubClass = 1,
2665 .bInterfaceProtocol = 0,
2666 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2667 /* Syntek (Asus U3S) */
2668 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2669 | USB_DEVICE_ID_MATCH_INT_INFO,
2670 .idVendor = 0x174f,
2671 .idProduct = 0x8a33,
2672 .bInterfaceClass = USB_CLASS_VIDEO,
2673 .bInterfaceSubClass = 1,
2674 .bInterfaceProtocol = 0,
2675 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2676 /* Syntek (JAOtech Smart Terminal) */
2677 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2678 | USB_DEVICE_ID_MATCH_INT_INFO,
2679 .idVendor = 0x174f,
2680 .idProduct = 0x8a34,
2681 .bInterfaceClass = USB_CLASS_VIDEO,
2682 .bInterfaceSubClass = 1,
2683 .bInterfaceProtocol = 0,
2684 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2685 /* Miricle 307K */
2686 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2687 | USB_DEVICE_ID_MATCH_INT_INFO,
2688 .idVendor = 0x17dc,
2689 .idProduct = 0x0202,
2690 .bInterfaceClass = USB_CLASS_VIDEO,
2691 .bInterfaceSubClass = 1,
2692 .bInterfaceProtocol = 0,
2693 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2694 /* Lenovo Thinkpad SL400/SL500 */
2695 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2696 | USB_DEVICE_ID_MATCH_INT_INFO,
2697 .idVendor = 0x17ef,
2698 .idProduct = 0x480b,
2699 .bInterfaceClass = USB_CLASS_VIDEO,
2700 .bInterfaceSubClass = 1,
2701 .bInterfaceProtocol = 0,
2702 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2703 /* Aveo Technology USB 2.0 Camera */
2704 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2705 | USB_DEVICE_ID_MATCH_INT_INFO,
2706 .idVendor = 0x1871,
2707 .idProduct = 0x0306,
2708 .bInterfaceClass = USB_CLASS_VIDEO,
2709 .bInterfaceSubClass = 1,
2710 .bInterfaceProtocol = 0,
2711 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2712 | UVC_QUIRK_PROBE_EXTRAFIELDS) },
2713 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2714 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2715 | USB_DEVICE_ID_MATCH_INT_INFO,
2716 .idVendor = 0x1871,
2717 .idProduct = 0x0516,
2718 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2719 .bInterfaceSubClass = 1,
2720 .bInterfaceProtocol = 0 },
2721 /* Ecamm Pico iMage */
2722 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2723 | USB_DEVICE_ID_MATCH_INT_INFO,
2724 .idVendor = 0x18cd,
2725 .idProduct = 0xcafe,
2726 .bInterfaceClass = USB_CLASS_VIDEO,
2727 .bInterfaceSubClass = 1,
2728 .bInterfaceProtocol = 0,
2729 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_EXTRAFIELDS) },
2730 /* Manta MM-353 Plako */
2731 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2732 | USB_DEVICE_ID_MATCH_INT_INFO,
2733 .idVendor = 0x18ec,
2734 .idProduct = 0x3188,
2735 .bInterfaceClass = USB_CLASS_VIDEO,
2736 .bInterfaceSubClass = 1,
2737 .bInterfaceProtocol = 0,
2738 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2739 /* FSC WebCam V30S */
2740 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2741 | USB_DEVICE_ID_MATCH_INT_INFO,
2742 .idVendor = 0x18ec,
2743 .idProduct = 0x3288,
2744 .bInterfaceClass = USB_CLASS_VIDEO,
2745 .bInterfaceSubClass = 1,
2746 .bInterfaceProtocol = 0,
2747 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2748 /* Arkmicro unbranded */
2749 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2750 | USB_DEVICE_ID_MATCH_INT_INFO,
2751 .idVendor = 0x18ec,
2752 .idProduct = 0x3290,
2753 .bInterfaceClass = USB_CLASS_VIDEO,
2754 .bInterfaceSubClass = 1,
2755 .bInterfaceProtocol = 0,
2756 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2757 /* The Imaging Source USB CCD cameras */
2758 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2759 | USB_DEVICE_ID_MATCH_INT_INFO,
2760 .idVendor = 0x199e,
2761 .idProduct = 0x8102,
2762 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2763 .bInterfaceSubClass = 1,
2764 .bInterfaceProtocol = 0 },
2765 /* Bodelin ProScopeHR */
2766 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2767 | USB_DEVICE_ID_MATCH_DEV_HI
2768 | USB_DEVICE_ID_MATCH_INT_INFO,
2769 .idVendor = 0x19ab,
2770 .idProduct = 0x1000,
2771 .bcdDevice_hi = 0x0126,
2772 .bInterfaceClass = USB_CLASS_VIDEO,
2773 .bInterfaceSubClass = 1,
2774 .bInterfaceProtocol = 0,
2775 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_STATUS_INTERVAL) },
2776 /* MSI StarCam 370i */
2777 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2778 | USB_DEVICE_ID_MATCH_INT_INFO,
2779 .idVendor = 0x1b3b,
2780 .idProduct = 0x2951,
2781 .bInterfaceClass = USB_CLASS_VIDEO,
2782 .bInterfaceSubClass = 1,
2783 .bInterfaceProtocol = 0,
2784 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2785 /* Generalplus Technology Inc. 808 Camera */
2786 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2787 | USB_DEVICE_ID_MATCH_INT_INFO,
2788 .idVendor = 0x1b3f,
2789 .idProduct = 0x2002,
2790 .bInterfaceClass = USB_CLASS_VIDEO,
2791 .bInterfaceSubClass = 1,
2792 .bInterfaceProtocol = 0,
2793 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2794 /* SiGma Micro USB Web Camera */
2795 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2796 | USB_DEVICE_ID_MATCH_INT_INFO,
2797 .idVendor = 0x1c4f,
2798 .idProduct = 0x3000,
2799 .bInterfaceClass = USB_CLASS_VIDEO,
2800 .bInterfaceSubClass = 1,
2801 .bInterfaceProtocol = 0,
2802 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2803 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
2804 /* Oculus VR Positional Tracker DK2 */
2805 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2806 | USB_DEVICE_ID_MATCH_INT_INFO,
2807 .idVendor = 0x2833,
2808 .idProduct = 0x0201,
2809 .bInterfaceClass = USB_CLASS_VIDEO,
2810 .bInterfaceSubClass = 1,
2811 .bInterfaceProtocol = 0,
2812 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2813 /* Oculus VR Rift Sensor */
2814 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2815 | USB_DEVICE_ID_MATCH_INT_INFO,
2816 .idVendor = 0x2833,
2817 .idProduct = 0x0211,
2818 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2819 .bInterfaceSubClass = 1,
2820 .bInterfaceProtocol = 0,
2821 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2822 /* Generic USB Video Class */
2823 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
2824 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
2825 {}
2826 };
2827
2828 MODULE_DEVICE_TABLE(usb, uvc_ids);
2829
2830 struct uvc_driver uvc_driver = {
2831 .driver = {
2832 .name = "uvcvideo",
2833 .probe = uvc_probe,
2834 .disconnect = uvc_disconnect,
2835 .suspend = uvc_suspend,
2836 .resume = uvc_resume,
2837 .reset_resume = uvc_reset_resume,
2838 .id_table = uvc_ids,
2839 .supports_autosuspend = 1,
2840 },
2841 };
2842
2843 static int __init uvc_init(void)
2844 {
2845 int ret;
2846
2847 uvc_debugfs_init();
2848
2849 ret = usb_register(&uvc_driver.driver);
2850 if (ret < 0) {
2851 uvc_debugfs_cleanup();
2852 return ret;
2853 }
2854
2855 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2856 return 0;
2857 }
2858
2859 static void __exit uvc_cleanup(void)
2860 {
2861 usb_deregister(&uvc_driver.driver);
2862 uvc_debugfs_cleanup();
2863 }
2864
2865 module_init(uvc_init);
2866 module_exit(uvc_cleanup);
2867
2868 MODULE_AUTHOR(DRIVER_AUTHOR);
2869 MODULE_DESCRIPTION(DRIVER_DESC);
2870 MODULE_LICENSE("GPL");
2871 MODULE_VERSION(DRIVER_VERSION);
2872
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