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[media] em28xx: embed video_device
[deliverable/linux.git] / drivers / media / usb / uvc / uvc_driver.c
CommitLineData
c0efd232
LP		 1/*
2 * uvc_driver.c -- USB Video Class driver
3 *
11fc5baf
LP		 4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
c0efd232
LP		 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
66ede038 14#include <linux/atomic.h>
c0efd232 15#include <linux/kernel.h>
c0efd232
LP		 16#include <linux/list.h>
17#include <linux/module.h>
5a0e3ad6 18#include <linux/slab.h>
c0efd232
LP		 19#include <linux/usb.h>
20#include <linux/videodev2.h>
21#include <linux/vmalloc.h>
22#include <linux/wait.h>
fd3e5824 23#include <linux/version.h>
9bc6218d 24#include <asm/unaligned.h>
c0efd232
LP		 25
26#include <media/v4l2-common.h>
27
28#include "uvcvideo.h"
29
11fc5baf
LP		 30#define DRIVER_AUTHOR "Laurent Pinchart " \
31 "<laurent.pinchart@ideasonboard.com>"
c0efd232 32#define DRIVER_DESC "USB Video Class driver"
c0efd232 33
310fe524 34unsigned int uvc_clock_param = CLOCK_MONOTONIC;
0fbd8ee6 35unsigned int uvc_no_drop_param;
73de3592 36static unsigned int uvc_quirks_param = -1;
c0efd232 37unsigned int uvc_trace_param;
b232a012 38unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
c0efd232
LP		 39
40/* ------------------------------------------------------------------------
2c2d264b 41 * Video formats
c0efd232
LP		 42 */
43
44static struct uvc_format_desc uvc_fmts[] = {
45 {
46 .name = "YUV 4:2:2 (YUYV)",
47 .guid = UVC_GUID_FORMAT_YUY2,
48 .fcc = V4L2_PIX_FMT_YUYV,
49 },
68f194e0
DR		 50 {
51 .name = "YUV 4:2:2 (YUYV)",
52 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
53 .fcc = V4L2_PIX_FMT_YUYV,
54 },
c0efd232
LP		 55 {
56 .name = "YUV 4:2:0 (NV12)",
57 .guid = UVC_GUID_FORMAT_NV12,
58 .fcc = V4L2_PIX_FMT_NV12,
59 },
60 {
61 .name = "MJPEG",
62 .guid = UVC_GUID_FORMAT_MJPEG,
63 .fcc = V4L2_PIX_FMT_MJPEG,
64 },
65 {
66 .name = "YVU 4:2:0 (YV12)",
67 .guid = UVC_GUID_FORMAT_YV12,
68 .fcc = V4L2_PIX_FMT_YVU420,
69 },
70 {
71 .name = "YUV 4:2:0 (I420)",
72 .guid = UVC_GUID_FORMAT_I420,
73 .fcc = V4L2_PIX_FMT_YUV420,
74 },
7225a1dc
HG		 75 {
76 .name = "YUV 4:2:0 (M420)",
77 .guid = UVC_GUID_FORMAT_M420,
78 .fcc = V4L2_PIX_FMT_M420,
79 },
c0efd232
LP		 80 {
81 .name = "YUV 4:2:2 (UYVY)",
82 .guid = UVC_GUID_FORMAT_UYVY,
83 .fcc = V4L2_PIX_FMT_UYVY,
84 },
85 {
ca47e719 86 .name = "Greyscale 8-bit (Y800)",
c0efd232
LP		 87 .guid = UVC_GUID_FORMAT_Y800,
88 .fcc = V4L2_PIX_FMT_GREY,
89 },
61421206 90 {
ca47e719
SM		 91 .name = "Greyscale 8-bit (Y8 )",
92 .guid = UVC_GUID_FORMAT_Y8,
93 .fcc = V4L2_PIX_FMT_GREY,
94 },
95 {
96 .name = "Greyscale 10-bit (Y10 )",
97 .guid = UVC_GUID_FORMAT_Y10,
98 .fcc = V4L2_PIX_FMT_Y10,
99 },
100 {
101 .name = "Greyscale 12-bit (Y12 )",
102 .guid = UVC_GUID_FORMAT_Y12,
103 .fcc = V4L2_PIX_FMT_Y12,
104 },
105 {
106 .name = "Greyscale 16-bit (Y16 )",
61421206
LP		 107 .guid = UVC_GUID_FORMAT_Y16,
108 .fcc = V4L2_PIX_FMT_Y16,
109 },
c0efd232 110 {
e72ed08e 111 .name = "BGGR Bayer (BY8 )",
c0efd232
LP		 112 .guid = UVC_GUID_FORMAT_BY8,
113 .fcc = V4L2_PIX_FMT_SBGGR8,
114 },
e72ed08e
ET		 115 {
116 .name = "BGGR Bayer (BA81)",
117 .guid = UVC_GUID_FORMAT_BA81,
118 .fcc = V4L2_PIX_FMT_SBGGR8,
119 },
120 {
121 .name = "GBRG Bayer (GBRG)",
122 .guid = UVC_GUID_FORMAT_GBRG,
123 .fcc = V4L2_PIX_FMT_SGBRG8,
124 },
125 {
126 .name = "GRBG Bayer (GRBG)",
127 .guid = UVC_GUID_FORMAT_GRBG,
128 .fcc = V4L2_PIX_FMT_SGRBG8,
129 },
130 {
131 .name = "RGGB Bayer (RGGB)",
132 .guid = UVC_GUID_FORMAT_RGGB,
133 .fcc = V4L2_PIX_FMT_SRGGB8,
134 },
50791079
LP		 135 {
136 .name = "RGB565",
137 .guid = UVC_GUID_FORMAT_RGBP,
138 .fcc = V4L2_PIX_FMT_RGB565,
139 },
1b8dc322
WM		 140 {
141 .name = "BGR 8:8:8 (BGR3)",
142 .guid = UVC_GUID_FORMAT_BGR3,
143 .fcc = V4L2_PIX_FMT_BGR24,
144 },
25ad8a8d
SL		 145 {
146 .name = "H.264",
147 .guid = UVC_GUID_FORMAT_H264,
148 .fcc = V4L2_PIX_FMT_H264,
149 },
c0efd232
LP		 150};
151
152/* ------------------------------------------------------------------------
153 * Utility functions
154 */
155
156struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
157 __u8 epaddr)
158{
159 struct usb_host_endpoint *ep;
160 unsigned int i;
161
162 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
163 ep = &alts->endpoint[i];
164 if (ep->desc.bEndpointAddress == epaddr)
165 return ep;
166 }
167
168 return NULL;
169}
170
171static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
172{
173 unsigned int len = ARRAY_SIZE(uvc_fmts);
174 unsigned int i;
175
176 for (i = 0; i < len; ++i) {
177 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
178 return &uvc_fmts[i];
179 }
180
181 return NULL;
182}
183
184static __u32 uvc_colorspace(const __u8 primaries)
185{
186 static const __u8 colorprimaries[] = {
187 0,
188 V4L2_COLORSPACE_SRGB,
189 V4L2_COLORSPACE_470_SYSTEM_M,
190 V4L2_COLORSPACE_470_SYSTEM_BG,
191 V4L2_COLORSPACE_SMPTE170M,
192 V4L2_COLORSPACE_SMPTE240M,
193 };
194
195 if (primaries < ARRAY_SIZE(colorprimaries))
196 return colorprimaries[primaries];
197
198 return 0;
199}
200
201/* Simplify a fraction using a simple continued fraction decomposition. The
202 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
203 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
204 * arbitrary parameters to remove non-significative terms from the simple
205 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
206 * respectively seems to give nice results.
207 */
208void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
209 unsigned int n_terms, unsigned int threshold)
210{
211 uint32_t *an;
212 uint32_t x, y, r;
213 unsigned int i, n;
214
215 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
216 if (an == NULL)
217 return;
218
219 /* Convert the fraction to a simple continued fraction. See
220 * http://mathforum.org/dr.math/faq/faq.fractions.html
221 * Stop if the current term is bigger than or equal to the given
222 * threshold.
223 */
224 x = *numerator;
225 y = *denominator;
226
227 for (n = 0; n < n_terms && y != 0; ++n) {
228 an[n] = x / y;
229 if (an[n] >= threshold) {
230 if (n < 2)
231 n++;
232 break;
233 }
234
235 r = x - an[n] * y;
236 x = y;
237 y = r;
238 }
239
240 /* Expand the simple continued fraction back to an integer fraction. */
241 x = 0;
242 y = 1;
243
244 for (i = n; i > 0; --i) {
245 r = y;
246 y = an[i-1] * y + x;
247 x = r;
248 }
249
250 *numerator = y;
251 *denominator = x;
252 kfree(an);
253}
254
255/* Convert a fraction to a frame interval in 100ns multiples. The idea here is
256 * to compute numerator / denominator * 10000000 using 32 bit fixed point
257 * arithmetic only.
258 */
259uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
260{
261 uint32_t multiplier;
262
263 /* Saturate the result if the operation would overflow. */
264 if (denominator == 0 ||
265 numerator/denominator >= ((uint32_t)-1)/10000000)
266 return (uint32_t)-1;
267
268 /* Divide both the denominator and the multiplier by two until
269 * numerator * multiplier doesn't overflow. If anyone knows a better
270 * algorithm please let me know.
271 */
272 multiplier = 10000000;
273 while (numerator > ((uint32_t)-1)/multiplier) {
274 multiplier /= 2;
275 denominator /= 2;
276 }
277
278 return denominator ? numerator * multiplier / denominator : 0;
279}
280
281/* ------------------------------------------------------------------------
282 * Terminal and unit management
283 */
284
4ffc2d89 285struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
c0efd232
LP		 286{
287 struct uvc_entity *entity;
288
289 list_for_each_entry(entity, &dev->entities, list) {
290 if (entity->id == id)
291 return entity;
292 }
293
294 return NULL;
295}
296
297static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
298 int id, struct uvc_entity *entity)
299{
300 unsigned int i;
301
302 if (entity == NULL)
303 entity = list_entry(&dev->entities, struct uvc_entity, list);
304
305 list_for_each_entry_continue(entity, &dev->entities, list) {
8ca5a639
LP		 306 for (i = 0; i < entity->bNrInPins; ++i)
307 if (entity->baSourceID[i] == id)
c0efd232 308 return entity;
c0efd232
LP		 309 }
310
311 return NULL;
312}
313
8e113595
LP		 314static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
315{
316 struct uvc_streaming *stream;
317
318 list_for_each_entry(stream, &dev->streams, list) {
319 if (stream->header.bTerminalLink == id)
320 return stream;
321 }
322
323 return NULL;
324}
325
c0efd232 326/* ------------------------------------------------------------------------
8e113595 327 * Descriptors parsing
c0efd232
LP		 328 */
329
330static int uvc_parse_format(struct uvc_device *dev,
331 struct uvc_streaming *streaming, struct uvc_format *format,
332 __u32 **intervals, unsigned char *buffer, int buflen)
333{
334 struct usb_interface *intf = streaming->intf;
335 struct usb_host_interface *alts = intf->cur_altsetting;
336 struct uvc_format_desc *fmtdesc;
337 struct uvc_frame *frame;
338 const unsigned char *start = buffer;
e1b78a33 339 unsigned int width_multiplier = 1;
c0efd232
LP		 340 unsigned int interval;
341 unsigned int i, n;
342 __u8 ftype;
343
344 format->type = buffer[2];
345 format->index = buffer[3];
346
347 switch (buffer[2]) {
b482d923
LP		 348 case UVC_VS_FORMAT_UNCOMPRESSED:
349 case UVC_VS_FORMAT_FRAME_BASED:
350 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
233548a2 351 if (buflen < n) {
b2d9cc42 352 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 353 "interface %d FORMAT error\n",
354 dev->udev->devnum,
355 alts->desc.bInterfaceNumber);
356 return -EINVAL;
357 }
358
359 /* Find the format descriptor from its GUID. */
360 fmtdesc = uvc_format_by_guid(&buffer[5]);
361
362 if (fmtdesc != NULL) {
d0ebf307 363 strlcpy(format->name, fmtdesc->name,
c0efd232
LP		 364 sizeof format->name);
365 format->fcc = fmtdesc->fcc;
366 } else {
36bd883e
LP		 367 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
368 &buffer[5]);
369 snprintf(format->name, sizeof(format->name), "%pUl\n",
370 &buffer[5]);
c0efd232
LP		 371 format->fcc = 0;
372 }
373
374 format->bpp = buffer[21];
e1b78a33
PZ		 375
376 /* Some devices report a format that doesn't match what they
377 * really send.
378 */
379 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
380 if (format->fcc == V4L2_PIX_FMT_YUYV) {
381 strlcpy(format->name, "Greyscale 8-bit (Y8 )",
382 sizeof(format->name));
383 format->fcc = V4L2_PIX_FMT_GREY;
384 format->bpp = 8;
385 width_multiplier = 2;
386 }
387 }
388
b482d923
LP		 389 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
390 ftype = UVC_VS_FRAME_UNCOMPRESSED;
c0efd232 391 } else {
b482d923 392 ftype = UVC_VS_FRAME_FRAME_BASED;
c0efd232
LP		 393 if (buffer[27])
394 format->flags = UVC_FMT_FLAG_COMPRESSED;
395 }
396 break;
397
b482d923 398 case UVC_VS_FORMAT_MJPEG:
c0efd232 399 if (buflen < 11) {
b2d9cc42 400 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 401 "interface %d FORMAT error\n",
402 dev->udev->devnum,
403 alts->desc.bInterfaceNumber);
404 return -EINVAL;
405 }
406
d0ebf307 407 strlcpy(format->name, "MJPEG", sizeof format->name);
c0efd232
LP		 408 format->fcc = V4L2_PIX_FMT_MJPEG;
409 format->flags = UVC_FMT_FLAG_COMPRESSED;
410 format->bpp = 0;
b482d923 411 ftype = UVC_VS_FRAME_MJPEG;
c0efd232
LP		 412 break;
413
b482d923 414 case UVC_VS_FORMAT_DV:
c0efd232 415 if (buflen < 9) {
b2d9cc42 416 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 417 "interface %d FORMAT error\n",
418 dev->udev->devnum,
419 alts->desc.bInterfaceNumber);
420 return -EINVAL;
421 }
422
423 switch (buffer[8] & 0x7f) {
424 case 0:
d0ebf307 425 strlcpy(format->name, "SD-DV", sizeof format->name);
c0efd232
LP		 426 break;
427 case 1:
d0ebf307 428 strlcpy(format->name, "SDL-DV", sizeof format->name);
c0efd232
LP		 429 break;
430 case 2:
d0ebf307 431 strlcpy(format->name, "HD-DV", sizeof format->name);
c0efd232
LP		 432 break;
433 default:
b2d9cc42 434 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 435 "interface %d: unknown DV format %u\n",
436 dev->udev->devnum,
437 alts->desc.bInterfaceNumber, buffer[8]);
438 return -EINVAL;
439 }
440
d0ebf307 441 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
c0efd232
LP		 442 sizeof format->name);
443
444 format->fcc = V4L2_PIX_FMT_DV;
445 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
446 format->bpp = 0;
447 ftype = 0;
448
449 /* Create a dummy frame descriptor. */
450 frame = &format->frame[0];
451 memset(&format->frame[0], 0, sizeof format->frame[0]);
452 frame->bFrameIntervalType = 1;
453 frame->dwDefaultFrameInterval = 1;
454 frame->dwFrameInterval = *intervals;
455 *(*intervals)++ = 1;
456 format->nframes = 1;
457 break;
458
b482d923
LP		 459 case UVC_VS_FORMAT_MPEG2TS:
460 case UVC_VS_FORMAT_STREAM_BASED:
c0efd232
LP		 461 /* Not supported yet. */
462 default:
b2d9cc42 463 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 464 "interface %d unsupported format %u\n",
465 dev->udev->devnum, alts->desc.bInterfaceNumber,
466 buffer[2]);
467 return -EINVAL;
468 }
469
470 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
471
472 buflen -= buffer[0];
473 buffer += buffer[0];
474
475 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
476 * based formats have frame descriptors.
477 */
c4ed8c66
LP		 478 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
479 buffer[2] == ftype) {
078f8947 480 frame = &format->frame[format->nframes];
b482d923 481 if (ftype != UVC_VS_FRAME_FRAME_BASED)
c0efd232
LP		 482 n = buflen > 25 ? buffer[25] : 0;
483 else
484 n = buflen > 21 ? buffer[21] : 0;
485
486 n = n ? n : 3;
487
488 if (buflen < 26 + 4*n) {
b2d9cc42 489 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 490 "interface %d FRAME error\n", dev->udev->devnum,
491 alts->desc.bInterfaceNumber);
492 return -EINVAL;
493 }
494
495 frame->bFrameIndex = buffer[3];
496 frame->bmCapabilities = buffer[4];
e1b78a33
PZ		 497 frame->wWidth = get_unaligned_le16(&buffer[5])
498 * width_multiplier;
9bc6218d
MH		 499 frame->wHeight = get_unaligned_le16(&buffer[7]);
500 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
501 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
b482d923 502 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
c0efd232 503 frame->dwMaxVideoFrameBufferSize =
9bc6218d 504 get_unaligned_le32(&buffer[17]);
c0efd232 505 frame->dwDefaultFrameInterval =
9bc6218d 506 get_unaligned_le32(&buffer[21]);
c0efd232
LP		 507 frame->bFrameIntervalType = buffer[25];
508 } else {
509 frame->dwMaxVideoFrameBufferSize = 0;
510 frame->dwDefaultFrameInterval =
9bc6218d 511 get_unaligned_le32(&buffer[17]);
c0efd232
LP		 512 frame->bFrameIntervalType = buffer[21];
513 }
514 frame->dwFrameInterval = *intervals;
515
516 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
517 * completely. Observed behaviours range from setting the
2c2d264b 518 * value to 1.1x the actual frame size to hardwiring the
c0efd232
LP		 519 * 16 low bits to 0. This results in a higher than necessary
520 * memory usage as well as a wrong image size information. For
521 * uncompressed formats this can be fixed by computing the
522 * value from the frame size.
523 */
524 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
525 frame->dwMaxVideoFrameBufferSize = format->bpp
526 * frame->wWidth * frame->wHeight / 8;
527
528 /* Some bogus devices report dwMinFrameInterval equal to
529 * dwMaxFrameInterval and have dwFrameIntervalStep set to
530 * zero. Setting all null intervals to 1 fixes the problem and
2c2d264b 531 * some other divisions by zero that could happen.
c0efd232
LP		 532 */
533 for (i = 0; i < n; ++i) {
9bc6218d 534 interval = get_unaligned_le32(&buffer[26+4*i]);
c0efd232
LP		 535 *(*intervals)++ = interval ? interval : 1;
536 }
537
538 /* Make sure that the default frame interval stays between
539 * the boundaries.
540 */
541 n -= frame->bFrameIntervalType ? 1 : 2;
542 frame->dwDefaultFrameInterval =
543 min(frame->dwFrameInterval[n],
544 max(frame->dwFrameInterval[0],
545 frame->dwDefaultFrameInterval));
546
86d8b6ab
LP		 547 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
548 frame->bFrameIntervalType = 1;
549 frame->dwFrameInterval[0] =
550 frame->dwDefaultFrameInterval;
551 }
552
c0efd232
LP		 553 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
554 frame->wWidth, frame->wHeight,
555 10000000/frame->dwDefaultFrameInterval,
556 (100000000/frame->dwDefaultFrameInterval)%10);
557
078f8947 558 format->nframes++;
c0efd232
LP		 559 buflen -= buffer[0];
560 buffer += buffer[0];
561 }
562
c4ed8c66
LP		 563 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
564 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
c0efd232
LP		 565 buflen -= buffer[0];
566 buffer += buffer[0];
567 }
568
c4ed8c66
LP		 569 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
570 buffer[2] == UVC_VS_COLORFORMAT) {
c0efd232 571 if (buflen < 6) {
b2d9cc42 572 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
c0efd232
LP		 573 "interface %d COLORFORMAT error\n",
574 dev->udev->devnum,
575 alts->desc.bInterfaceNumber);
576 return -EINVAL;
577 }
578
579 format->colorspace = uvc_colorspace(buffer[3]);
580
581 buflen -= buffer[0];
582 buffer += buffer[0];
583 }
584
585 return buffer - start;
586}
587
588static int uvc_parse_streaming(struct uvc_device *dev,
589 struct usb_interface *intf)
590{
591 struct uvc_streaming *streaming = NULL;
592 struct uvc_format *format;
593 struct uvc_frame *frame;
594 struct usb_host_interface *alts = &intf->altsetting[0];
595 unsigned char *_buffer, *buffer = alts->extra;
596 int _buflen, buflen = alts->extralen;
597 unsigned int nformats = 0, nframes = 0, nintervals = 0;
598 unsigned int size, i, n, p;
599 __u32 *interval;
600 __u16 psize;
601 int ret = -EINVAL;
602
603 if (intf->cur_altsetting->desc.bInterfaceSubClass
b482d923 604 != UVC_SC_VIDEOSTREAMING) {
c0efd232
LP		 605 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
606 "video streaming interface\n", dev->udev->devnum,
607 intf->altsetting[0].desc.bInterfaceNumber);
608 return -EINVAL;
609 }
610
611 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
612 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
613 "claimed\n", dev->udev->devnum,
614 intf->altsetting[0].desc.bInterfaceNumber);
615 return -EINVAL;
616 }
617
618 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
619 if (streaming == NULL) {
620 usb_driver_release_interface(&uvc_driver.driver, intf);
621 return -EINVAL;
622 }
623
624 mutex_init(&streaming->mutex);
35f02a68 625 streaming->dev = dev;
c0efd232
LP		 626 streaming->intf = usb_get_intf(intf);
627 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
628
629 /* The Pico iMage webcam has its class-specific interface descriptors
630 * after the endpoint descriptors.
631 */
632 if (buflen == 0) {
633 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
634 struct usb_host_endpoint *ep = &alts->endpoint[i];
635
636 if (ep->extralen == 0)
637 continue;
638
639 if (ep->extralen > 2 &&
640 ep->extra[1] == USB_DT_CS_INTERFACE) {
641 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
642 "from endpoint %u.\n", i);
643 buffer = alts->endpoint[i].extra;
644 buflen = alts->endpoint[i].extralen;
645 break;
646 }
647 }
648 }
649
650 /* Skip the standard interface descriptors. */
651 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
652 buflen -= buffer[0];
653 buffer += buffer[0];
654 }
655
656 if (buflen <= 2) {
657 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
658 "interface descriptors found.\n");
659 goto error;
660 }
661
662 /* Parse the header descriptor. */
ff924203 663 switch (buffer[2]) {
b482d923 664 case UVC_VS_OUTPUT_HEADER:
ff924203
LP		 665 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
666 size = 9;
667 break;
668
b482d923 669 case UVC_VS_INPUT_HEADER:
ff924203
LP		 670 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
671 size = 13;
672 break;
673
674 default:
c0efd232 675 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
ff924203
LP		 676 "%d HEADER descriptor not found.\n", dev->udev->devnum,
677 alts->desc.bInterfaceNumber);
c0efd232 678 goto error;
ff924203 679 }
c0efd232 680
ff924203
LP		 681 p = buflen >= 4 ? buffer[3] : 0;
682 n = buflen >= size ? buffer[size-1] : 0;
683
684 if (buflen < size + p*n) {
685 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
686 "interface %d HEADER descriptor is invalid.\n",
687 dev->udev->devnum, alts->desc.bInterfaceNumber);
688 goto error;
689 }
c0efd232 690
ff924203
LP		 691 streaming->header.bNumFormats = p;
692 streaming->header.bEndpointAddress = buffer[6];
b482d923 693 if (buffer[2] == UVC_VS_INPUT_HEADER) {
c0efd232
LP		 694 streaming->header.bmInfo = buffer[7];
695 streaming->header.bTerminalLink = buffer[8];
696 streaming->header.bStillCaptureMethod = buffer[9];
697 streaming->header.bTriggerSupport = buffer[10];
698 streaming->header.bTriggerUsage = buffer[11];
c0efd232 699 } else {
ff924203
LP		 700 streaming->header.bTerminalLink = buffer[7];
701 }
702 streaming->header.bControlSize = n;
703
0b21d55f
JL		 704 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
705 GFP_KERNEL);
ff924203
LP		 706 if (streaming->header.bmaControls == NULL) {
707 ret = -ENOMEM;
c0efd232
LP		 708 goto error;
709 }
710
711 buflen -= buffer[0];
712 buffer += buffer[0];
713
714 _buffer = buffer;
715 _buflen = buflen;
716
717 /* Count the format and frame descriptors. */
042e143e 718 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
c0efd232 719 switch (_buffer[2]) {
b482d923
LP		 720 case UVC_VS_FORMAT_UNCOMPRESSED:
721 case UVC_VS_FORMAT_MJPEG:
722 case UVC_VS_FORMAT_FRAME_BASED:
c0efd232
LP		 723 nformats++;
724 break;
725
b482d923 726 case UVC_VS_FORMAT_DV:
c0efd232
LP		 727 /* DV format has no frame descriptor. We will create a
728 * dummy frame descriptor with a dummy frame interval.
729 */
730 nformats++;
731 nframes++;
732 nintervals++;
733 break;
734
b482d923
LP		 735 case UVC_VS_FORMAT_MPEG2TS:
736 case UVC_VS_FORMAT_STREAM_BASED:
c0efd232
LP		 737 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
738 "interface %d FORMAT %u is not supported.\n",
739 dev->udev->devnum,
740 alts->desc.bInterfaceNumber, _buffer[2]);
741 break;
742
b482d923
LP		 743 case UVC_VS_FRAME_UNCOMPRESSED:
744 case UVC_VS_FRAME_MJPEG:
c0efd232
LP		 745 nframes++;
746 if (_buflen > 25)
747 nintervals += _buffer[25] ? _buffer[25] : 3;
748 break;
749
b482d923 750 case UVC_VS_FRAME_FRAME_BASED:
c0efd232
LP		 751 nframes++;
752 if (_buflen > 21)
753 nintervals += _buffer[21] ? _buffer[21] : 3;
754 break;
755 }
756
757 _buflen -= _buffer[0];
758 _buffer += _buffer[0];
759 }
760
761 if (nformats == 0) {
762 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
763 "%d has no supported formats defined.\n",
764 dev->udev->devnum, alts->desc.bInterfaceNumber);
765 goto error;
766 }
767
768 size = nformats * sizeof *format + nframes * sizeof *frame
769 + nintervals * sizeof *interval;
770 format = kzalloc(size, GFP_KERNEL);
771 if (format == NULL) {
772 ret = -ENOMEM;
773 goto error;
774 }
775
776 frame = (struct uvc_frame *)&format[nformats];
777 interval = (__u32 *)&frame[nframes];
778
779 streaming->format = format;
780 streaming->nformats = nformats;
781
782 /* Parse the format descriptors. */
042e143e 783 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
c0efd232 784 switch (buffer[2]) {
b482d923
LP		 785 case UVC_VS_FORMAT_UNCOMPRESSED:
786 case UVC_VS_FORMAT_MJPEG:
787 case UVC_VS_FORMAT_DV:
788 case UVC_VS_FORMAT_FRAME_BASED:
c0efd232
LP		 789 format->frame = frame;
790 ret = uvc_parse_format(dev, streaming, format,
791 &interval, buffer, buflen);
792 if (ret < 0)
793 goto error;
794
795 frame += format->nframes;
796 format++;
797
798 buflen -= ret;
799 buffer += ret;
800 continue;
801
802 default:
803 break;
804 }
805
806 buflen -= buffer[0];
807 buffer += buffer[0];
808 }
809
c4ed8c66
LP		 810 if (buflen)
811 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
812 "%d has %u bytes of trailing descriptor garbage.\n",
813 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
814
c0efd232
LP		 815 /* Parse the alternate settings to find the maximum bandwidth. */
816 for (i = 0; i < intf->num_altsetting; ++i) {
817 struct usb_host_endpoint *ep;
818 alts = &intf->altsetting[i];
819 ep = uvc_find_endpoint(alts,
820 streaming->header.bEndpointAddress);
821 if (ep == NULL)
822 continue;
823
824 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
825 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
826 if (psize > streaming->maxpsize)
827 streaming->maxpsize = psize;
828 }
829
35f02a68 830 list_add_tail(&streaming->list, &dev->streams);
c0efd232
LP		 831 return 0;
832
833error:
834 usb_driver_release_interface(&uvc_driver.driver, intf);
835 usb_put_intf(intf);
836 kfree(streaming->format);
837 kfree(streaming->header.bmaControls);
838 kfree(streaming);
839 return ret;
840}
841
8ca5a639
LP		 842static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
843 unsigned int num_pads, unsigned int extra_size)
844{
845 struct uvc_entity *entity;
846 unsigned int num_inputs;
847 unsigned int size;
4ffc2d89 848 unsigned int i;
8ca5a639 849
4ffc2d89 850 extra_size = ALIGN(extra_size, sizeof(*entity->pads));
8ca5a639 851 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
4ffc2d89
LP		 852 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
853 + num_inputs;
8ca5a639
LP		 854 entity = kzalloc(size, GFP_KERNEL);
855 if (entity == NULL)
856 return NULL;
857
858 entity->id = id;
859 entity->type = type;
860
4ffc2d89
LP		 861 entity->num_links = 0;
862 entity->num_pads = num_pads;
863 entity->pads = ((void *)(entity + 1)) + extra_size;
864
865 for (i = 0; i < num_inputs; ++i)
866 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
867 if (!UVC_ENTITY_IS_OTERM(entity))
868 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
869
8ca5a639 870 entity->bNrInPins = num_inputs;
4ffc2d89 871 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
8ca5a639
LP		 872
873 return entity;
874}
875
c0efd232
LP		 876/* Parse vendor-specific extensions. */
877static int uvc_parse_vendor_control(struct uvc_device *dev,
878 const unsigned char *buffer, int buflen)
879{
880 struct usb_device *udev = dev->udev;
881 struct usb_host_interface *alts = dev->intf->cur_altsetting;
882 struct uvc_entity *unit;
883 unsigned int n, p;
884 int handled = 0;
885
886 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
887 case 0x046d: /* Logitech */
888 if (buffer[1] != 0x41 || buffer[2] != 0x01)
889 break;
890
891 /* Logitech implements several vendor specific functions
892 * through vendor specific extension units (LXU).
893 *
894 * The LXU descriptors are similar to XU descriptors
895 * (see "USB Device Video Class for Video Devices", section
896 * 3.7.2.6 "Extension Unit Descriptor") with the following
897 * differences:
898 *
899 * ----------------------------------------------------------
900 * 0 bLength 1 Number
901 * Size of this descriptor, in bytes: 24+p+n*2
902 * ----------------------------------------------------------
903 * 23+p+n bmControlsType N Bitmap
904 * Individual bits in the set are defined:
905 * 0: Absolute
906 * 1: Relative
907 *
908 * This bitset is mapped exactly the same as bmControls.
909 * ----------------------------------------------------------
910 * 23+p+n*2 bReserved 1 Boolean
911 * ----------------------------------------------------------
912 * 24+p+n*2 iExtension 1 Index
913 * Index of a string descriptor that describes this
914 * extension unit.
915 * ----------------------------------------------------------
916 */
917 p = buflen >= 22 ? buffer[21] : 0;
918 n = buflen >= 25 + p ? buffer[22+p] : 0;
919
920 if (buflen < 25 + p + 2*n) {
921 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
922 "interface %d EXTENSION_UNIT error\n",
923 udev->devnum, alts->desc.bInterfaceNumber);
924 break;
925 }
926
8ca5a639
LP		 927 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
928 p + 1, 2*n);
c0efd232
LP		 929 if (unit == NULL)
930 return -ENOMEM;
931
c0efd232
LP		 932 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
933 unit->extension.bNumControls = buffer[20];
8ca5a639 934 memcpy(unit->baSourceID, &buffer[22], p);
c0efd232 935 unit->extension.bControlSize = buffer[22+p];
8ca5a639
LP		 936 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
937 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
938 + n;
c0efd232
LP		 939 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
940
941 if (buffer[24+p+2*n] != 0)
942 usb_string(udev, buffer[24+p+2*n], unit->name,
943 sizeof unit->name);
944 else
945 sprintf(unit->name, "Extension %u", buffer[3]);
946
947 list_add_tail(&unit->list, &dev->entities);
948 handled = 1;
949 break;
950 }
951
952 return handled;
953}
954
955static int uvc_parse_standard_control(struct uvc_device *dev,
956 const unsigned char *buffer, int buflen)
957{
958 struct usb_device *udev = dev->udev;
959 struct uvc_entity *unit, *term;
960 struct usb_interface *intf;
961 struct usb_host_interface *alts = dev->intf->cur_altsetting;
962 unsigned int i, n, p, len;
963 __u16 type;
964
965 switch (buffer[2]) {
b482d923 966 case UVC_VC_HEADER:
c0efd232
LP		 967 n = buflen >= 12 ? buffer[11] : 0;
968
daf41ac2 969 if (buflen < 12 + n) {
c0efd232
LP		 970 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
971 "interface %d HEADER error\n", udev->devnum,
972 alts->desc.bInterfaceNumber);
973 return -EINVAL;
974 }
975
9bc6218d
MH		 976 dev->uvc_version = get_unaligned_le16(&buffer[3]);
977 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
c0efd232
LP		 978
979 /* Parse all USB Video Streaming interfaces. */
980 for (i = 0; i < n; ++i) {
981 intf = usb_ifnum_to_if(udev, buffer[12+i]);
982 if (intf == NULL) {
983 uvc_trace(UVC_TRACE_DESCR, "device %d "
984 "interface %d doesn't exists\n",
985 udev->devnum, i);
986 continue;
987 }
988
989 uvc_parse_streaming(dev, intf);
990 }
991 break;
992
b482d923 993 case UVC_VC_INPUT_TERMINAL:
c0efd232
LP		 994 if (buflen < 8) {
995 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
996 "interface %d INPUT_TERMINAL error\n",
997 udev->devnum, alts->desc.bInterfaceNumber);
998 return -EINVAL;
999 }
1000
1001 /* Make sure the terminal type MSB is not null, otherwise it
1002 * could be confused with a unit.
1003 */
9bc6218d 1004 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 1005 if ((type & 0xff00) == 0) {
1006 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1007 "interface %d INPUT_TERMINAL %d has invalid "
1008 "type 0x%04x, skipping\n", udev->devnum,
1009 alts->desc.bInterfaceNumber,
1010 buffer[3], type);
1011 return 0;
1012 }
1013
1014 n = 0;
1015 p = 0;
1016 len = 8;
1017
b482d923 1018 if (type == UVC_ITT_CAMERA) {
c0efd232
LP		 1019 n = buflen >= 15 ? buffer[14] : 0;
1020 len = 15;
1021
b482d923 1022 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
c0efd232
LP		 1023 n = buflen >= 9 ? buffer[8] : 0;
1024 p = buflen >= 10 + n ? buffer[9+n] : 0;
1025 len = 10;
1026 }
1027
1028 if (buflen < len + n + p) {
1029 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1030 "interface %d INPUT_TERMINAL error\n",
1031 udev->devnum, alts->desc.bInterfaceNumber);
1032 return -EINVAL;
1033 }
1034
8ca5a639
LP		 1035 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1036 1, n + p);
c0efd232
LP		 1037 if (term == NULL)
1038 return -ENOMEM;
1039
b482d923 1040 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
c0efd232
LP		 1041 term->camera.bControlSize = n;
1042 term->camera.bmControls = (__u8 *)term + sizeof *term;
1043 term->camera.wObjectiveFocalLengthMin =
9bc6218d 1044 get_unaligned_le16(&buffer[8]);
c0efd232 1045 term->camera.wObjectiveFocalLengthMax =
9bc6218d 1046 get_unaligned_le16(&buffer[10]);
c0efd232 1047 term->camera.wOcularFocalLength =
9bc6218d 1048 get_unaligned_le16(&buffer[12]);
c0efd232 1049 memcpy(term->camera.bmControls, &buffer[15], n);
b482d923
LP		 1050 } else if (UVC_ENTITY_TYPE(term) ==
1051 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
c0efd232
LP		 1052 term->media.bControlSize = n;
1053 term->media.bmControls = (__u8 *)term + sizeof *term;
1054 term->media.bTransportModeSize = p;
1055 term->media.bmTransportModes = (__u8 *)term
1056 + sizeof *term + n;
1057 memcpy(term->media.bmControls, &buffer[9], n);
1058 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1059 }
1060
1061 if (buffer[7] != 0)
1062 usb_string(udev, buffer[7], term->name,
1063 sizeof term->name);
b482d923 1064 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
c0efd232 1065 sprintf(term->name, "Camera %u", buffer[3]);
b482d923 1066 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
c0efd232
LP		 1067 sprintf(term->name, "Media %u", buffer[3]);
1068 else
1069 sprintf(term->name, "Input %u", buffer[3]);
1070
1071 list_add_tail(&term->list, &dev->entities);
1072 break;
1073
b482d923 1074 case UVC_VC_OUTPUT_TERMINAL:
c0efd232
LP		 1075 if (buflen < 9) {
1076 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1077 "interface %d OUTPUT_TERMINAL error\n",
1078 udev->devnum, alts->desc.bInterfaceNumber);
1079 return -EINVAL;
1080 }
1081
1082 /* Make sure the terminal type MSB is not null, otherwise it
1083 * could be confused with a unit.
1084 */
9bc6218d 1085 type = get_unaligned_le16(&buffer[4]);
c0efd232
LP		 1086 if ((type & 0xff00) == 0) {
1087 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1088 "interface %d OUTPUT_TERMINAL %d has invalid "
1089 "type 0x%04x, skipping\n", udev->devnum,
1090 alts->desc.bInterfaceNumber, buffer[3], type);
1091 return 0;
1092 }
1093
8ca5a639
LP		 1094 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1095 1, 0);
c0efd232
LP		 1096 if (term == NULL)
1097 return -ENOMEM;
1098
8ca5a639 1099 memcpy(term->baSourceID, &buffer[7], 1);
c0efd232
LP		 1100
1101 if (buffer[8] != 0)
1102 usb_string(udev, buffer[8], term->name,
1103 sizeof term->name);
1104 else
1105 sprintf(term->name, "Output %u", buffer[3]);
1106
1107 list_add_tail(&term->list, &dev->entities);
1108 break;
1109
b482d923 1110 case UVC_VC_SELECTOR_UNIT:
c0efd232
LP		 1111 p = buflen >= 5 ? buffer[4] : 0;
1112
1113 if (buflen < 5 || buflen < 6 + p) {
1114 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1115 "interface %d SELECTOR_UNIT error\n",
1116 udev->devnum, alts->desc.bInterfaceNumber);
1117 return -EINVAL;
1118 }
1119
8ca5a639 1120 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
c0efd232
LP		 1121 if (unit == NULL)
1122 return -ENOMEM;
1123
8ca5a639 1124 memcpy(unit->baSourceID, &buffer[5], p);
c0efd232
LP		 1125
1126 if (buffer[5+p] != 0)
1127 usb_string(udev, buffer[5+p], unit->name,
1128 sizeof unit->name);
1129 else
1130 sprintf(unit->name, "Selector %u", buffer[3]);
1131
1132 list_add_tail(&unit->list, &dev->entities);
1133 break;
1134
b482d923 1135 case UVC_VC_PROCESSING_UNIT:
c0efd232
LP		 1136 n = buflen >= 8 ? buffer[7] : 0;
1137 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1138
1139 if (buflen < p + n) {
1140 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1141 "interface %d PROCESSING_UNIT error\n",
1142 udev->devnum, alts->desc.bInterfaceNumber);
1143 return -EINVAL;
1144 }
1145
8ca5a639 1146 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
c0efd232
LP		 1147 if (unit == NULL)
1148 return -ENOMEM;
1149
8ca5a639 1150 memcpy(unit->baSourceID, &buffer[4], 1);
c0efd232 1151 unit->processing.wMaxMultiplier =
9bc6218d 1152 get_unaligned_le16(&buffer[5]);
c0efd232
LP		 1153 unit->processing.bControlSize = buffer[7];
1154 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1155 memcpy(unit->processing.bmControls, &buffer[8], n);
1156 if (dev->uvc_version >= 0x0110)
1157 unit->processing.bmVideoStandards = buffer[9+n];
1158
1159 if (buffer[8+n] != 0)
1160 usb_string(udev, buffer[8+n], unit->name,
1161 sizeof unit->name);
1162 else
1163 sprintf(unit->name, "Processing %u", buffer[3]);
1164
1165 list_add_tail(&unit->list, &dev->entities);
1166 break;
1167
b482d923 1168 case UVC_VC_EXTENSION_UNIT:
c0efd232
LP		 1169 p = buflen >= 22 ? buffer[21] : 0;
1170 n = buflen >= 24 + p ? buffer[22+p] : 0;
1171
1172 if (buflen < 24 + p + n) {
1173 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1174 "interface %d EXTENSION_UNIT error\n",
1175 udev->devnum, alts->desc.bInterfaceNumber);
1176 return -EINVAL;
1177 }
1178
8ca5a639 1179 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
c0efd232
LP		 1180 if (unit == NULL)
1181 return -ENOMEM;
1182
c0efd232
LP		 1183 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1184 unit->extension.bNumControls = buffer[20];
8ca5a639 1185 memcpy(unit->baSourceID, &buffer[22], p);
c0efd232 1186 unit->extension.bControlSize = buffer[22+p];
8ca5a639 1187 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
c0efd232
LP		 1188 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1189
1190 if (buffer[23+p+n] != 0)
1191 usb_string(udev, buffer[23+p+n], unit->name,
1192 sizeof unit->name);
1193 else
1194 sprintf(unit->name, "Extension %u", buffer[3]);
1195
1196 list_add_tail(&unit->list, &dev->entities);
1197 break;
1198
1199 default:
1200 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1201 "descriptor (%u)\n", buffer[2]);
1202 break;
1203 }
1204
1205 return 0;
1206}
1207
1208static int uvc_parse_control(struct uvc_device *dev)
1209{
1210 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1211 unsigned char *buffer = alts->extra;
1212 int buflen = alts->extralen;
1213 int ret;
1214
1215 /* Parse the default alternate setting only, as the UVC specification
1216 * defines a single alternate setting, the default alternate setting
1217 * zero.
1218 */
1219
1220 while (buflen > 2) {
1221 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1222 buffer[1] != USB_DT_CS_INTERFACE)
1223 goto next_descriptor;
1224
1225 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1226 return ret;
1227
1228next_descriptor:
1229 buflen -= buffer[0];
1230 buffer += buffer[0];
1231 }
1232
538e7a00
LP		 1233 /* Check if the optional status endpoint is present. Built-in iSight
1234 * webcams have an interrupt endpoint but spit proprietary data that
1235 * don't conform to the UVC status endpoint messages. Don't try to
1236 * handle the interrupt endpoint for those cameras.
1237 */
1238 if (alts->desc.bNumEndpoints == 1 &&
1239 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
c0efd232
LP		 1240 struct usb_host_endpoint *ep = &alts->endpoint[0];
1241 struct usb_endpoint_descriptor *desc = &ep->desc;
1242
1243 if (usb_endpoint_is_int_in(desc) &&
1244 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1245 desc->bInterval != 0) {
1246 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1247 "(addr %02x).\n", desc->bEndpointAddress);
1248 dev->int_ep = ep;
1249 }
1250 }
1251
1252 return 0;
1253}
1254
1255/* ------------------------------------------------------------------------
8e113595 1256 * UVC device scan
c0efd232
LP		 1257 */
1258
c0efd232
LP		 1259/*
1260 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1261 * and containing the following units:
1262 *
8e113595 1263 * - one or more Output Terminals (USB Streaming or Display)
c0efd232 1264 * - zero or one Processing Unit
8e113595 1265 * - zero, one or more single-input Selector Units
c0efd232
LP		 1266 * - zero or one multiple-input Selector Units, provided all inputs are
1267 * connected to input terminals
1268 * - zero, one or mode single-input Extension Units
2c2d264b 1269 * - one or more Input Terminals (Camera, External or USB Streaming)
c0efd232 1270 *
8e113595
LP		 1271 * The terminal and units must match on of the following structures:
1272 *
1273 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1274 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1275 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1276 *
1277 * +---------+ +---------+ -> OTT_*(0)
1278 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1279 * +---------+ +---------+ -> OTT_*(n)
1280 *
1281 * The Processing Unit and Extension Units can be in any order. Additional
1282 * Extension Units connected to the main chain as single-unit branches are
1283 * also supported. Single-input Selector Units are ignored.
c0efd232 1284 */
8e113595 1285static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
c0efd232
LP		 1286 struct uvc_entity *entity)
1287{
1288 switch (UVC_ENTITY_TYPE(entity)) {
b482d923 1289 case UVC_VC_EXTENSION_UNIT:
c0efd232
LP		 1290 if (uvc_trace_param & UVC_TRACE_PROBE)
1291 printk(" <- XU %d", entity->id);
1292
8ca5a639 1293 if (entity->bNrInPins != 1) {
c0efd232
LP		 1294 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1295 "than 1 input pin.\n", entity->id);
1296 return -1;
1297 }
1298
c0efd232
LP		 1299 break;
1300
b482d923 1301 case UVC_VC_PROCESSING_UNIT:
c0efd232
LP		 1302 if (uvc_trace_param & UVC_TRACE_PROBE)
1303 printk(" <- PU %d", entity->id);
1304
8e113595 1305 if (chain->processing != NULL) {
c0efd232
LP		 1306 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1307 "Processing Units in chain.\n");
1308 return -1;
1309 }
1310
8e113595 1311 chain->processing = entity;
c0efd232
LP		 1312 break;
1313
b482d923 1314 case UVC_VC_SELECTOR_UNIT:
c0efd232
LP		 1315 if (uvc_trace_param & UVC_TRACE_PROBE)
1316 printk(" <- SU %d", entity->id);
1317
1318 /* Single-input selector units are ignored. */
8ca5a639 1319 if (entity->bNrInPins == 1)
c0efd232
LP		 1320 break;
1321
8e113595 1322 if (chain->selector != NULL) {
c0efd232
LP		 1323 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1324 "Units in chain.\n");
1325 return -1;
1326 }
1327
8e113595 1328 chain->selector = entity;
c0efd232
LP		 1329 break;
1330
b482d923
LP		 1331 case UVC_ITT_VENDOR_SPECIFIC:
1332 case UVC_ITT_CAMERA:
1333 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
c0efd232
LP		 1334 if (uvc_trace_param & UVC_TRACE_PROBE)
1335 printk(" <- IT %d\n", entity->id);
1336
c0efd232
LP		 1337 break;
1338
4093a5c4
LP		 1339 case UVC_OTT_VENDOR_SPECIFIC:
1340 case UVC_OTT_DISPLAY:
1341 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1342 if (uvc_trace_param & UVC_TRACE_PROBE)
1343 printk(" OT %d", entity->id);
1344
1345 break;
1346
b482d923 1347 case UVC_TT_STREAMING:
4057ac6c
LP		 1348 if (UVC_ENTITY_IS_ITERM(entity)) {
1349 if (uvc_trace_param & UVC_TRACE_PROBE)
1350 printk(" <- IT %d\n", entity->id);
1351 } else {
1352 if (uvc_trace_param & UVC_TRACE_PROBE)
1353 printk(" OT %d", entity->id);
ff924203
LP		 1354 }
1355
ff924203
LP		 1356 break;
1357
c0efd232
LP		 1358 default:
1359 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1360 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1361 return -1;
1362 }
1363
6241d8ca 1364 list_add_tail(&entity->chain, &chain->entities);
c0efd232
LP		 1365 return 0;
1366}
1367
8e113595 1368static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
c0efd232
LP		 1369 struct uvc_entity *entity, struct uvc_entity *prev)
1370{
1371 struct uvc_entity *forward;
1372 int found;
1373
1374 /* Forward scan */
1375 forward = NULL;
1376 found = 0;
1377
1378 while (1) {
8e113595 1379 forward = uvc_entity_by_reference(chain->dev, entity->id,
c0efd232
LP		 1380 forward);
1381 if (forward == NULL)
1382 break;
8e113595 1383 if (forward == prev)
c0efd232
LP		 1384 continue;
1385
8e113595
LP		 1386 switch (UVC_ENTITY_TYPE(forward)) {
1387 case UVC_VC_EXTENSION_UNIT:
8ca5a639 1388 if (forward->bNrInPins != 1) {
8e113595
LP		 1389 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1390 "has more than 1 input pin.\n",
1391 entity->id);
1392 return -EINVAL;
1393 }
c0efd232 1394
6241d8ca 1395 list_add_tail(&forward->chain, &chain->entities);
8e113595
LP		 1396 if (uvc_trace_param & UVC_TRACE_PROBE) {
1397 if (!found)
1398 printk(" (->");
1399
1400 printk(" XU %d", forward->id);
1401 found = 1;
1402 }
1403 break;
1404
1405 case UVC_OTT_VENDOR_SPECIFIC:
1406 case UVC_OTT_DISPLAY:
1407 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1408 case UVC_TT_STREAMING:
1409 if (UVC_ENTITY_IS_ITERM(forward)) {
1410 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1411 "terminal %u.\n", forward->id);
1412 return -EINVAL;
1413 }
c0efd232 1414
6241d8ca 1415 list_add_tail(&forward->chain, &chain->entities);
8e113595
LP		 1416 if (uvc_trace_param & UVC_TRACE_PROBE) {
1417 if (!found)
1418 printk(" (->");
1419
1420 printk(" OT %d", forward->id);
1421 found = 1;
1422 }
1423 break;
c0efd232
LP		 1424 }
1425 }
1426 if (found)
1427 printk(")");
1428
1429 return 0;
1430}
1431
8e113595 1432static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
4057ac6c 1433 struct uvc_entity **_entity)
c0efd232 1434{
4057ac6c 1435 struct uvc_entity *entity = *_entity;
c0efd232 1436 struct uvc_entity *term;
4057ac6c 1437 int id = -EINVAL, i;
c0efd232
LP		 1438
1439 switch (UVC_ENTITY_TYPE(entity)) {
b482d923 1440 case UVC_VC_EXTENSION_UNIT:
b482d923 1441 case UVC_VC_PROCESSING_UNIT:
8ca5a639 1442 id = entity->baSourceID[0];
c0efd232
LP		 1443 break;
1444
b482d923 1445 case UVC_VC_SELECTOR_UNIT:
c0efd232 1446 /* Single-input selector units are ignored. */
8ca5a639
LP		 1447 if (entity->bNrInPins == 1) {
1448 id = entity->baSourceID[0];
c0efd232
LP		 1449 break;
1450 }
1451
1452 if (uvc_trace_param & UVC_TRACE_PROBE)
1453 printk(" <- IT");
1454
8e113595 1455 chain->selector = entity;
8ca5a639
LP		 1456 for (i = 0; i < entity->bNrInPins; ++i) {
1457 id = entity->baSourceID[i];
8e113595 1458 term = uvc_entity_by_id(chain->dev, id);
c0efd232
LP		 1459 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1460 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1461 "input %d isn't connected to an "
1462 "input terminal\n", entity->id, i);
1463 return -1;
1464 }
1465
1466 if (uvc_trace_param & UVC_TRACE_PROBE)
1467 printk(" %d", term->id);
1468
6241d8ca 1469 list_add_tail(&term->chain, &chain->entities);
8e113595 1470 uvc_scan_chain_forward(chain, term, entity);
c0efd232
LP		 1471 }
1472
1473 if (uvc_trace_param & UVC_TRACE_PROBE)
1474 printk("\n");
1475
1476 id = 0;
1477 break;
4057ac6c
LP		 1478
1479 case UVC_ITT_VENDOR_SPECIFIC:
1480 case UVC_ITT_CAMERA:
1481 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1482 case UVC_OTT_VENDOR_SPECIFIC:
1483 case UVC_OTT_DISPLAY:
1484 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1485 case UVC_TT_STREAMING:
8ca5a639 1486 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
4057ac6c 1487 break;
c0efd232
LP		 1488 }
1489
4057ac6c
LP		 1490 if (id <= 0) {
1491 *_entity = NULL;
1492 return id;
1493 }
1494
1495 entity = uvc_entity_by_id(chain->dev, id);
1496 if (entity == NULL) {
1497 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1498 "unknown entity %d.\n", id);
1499 return -EINVAL;
1500 }
1501
1502 *_entity = entity;
1503 return 0;
c0efd232
LP		 1504}
1505
8e113595 1506static int uvc_scan_chain(struct uvc_video_chain *chain,
4057ac6c 1507 struct uvc_entity *term)
c0efd232
LP		 1508{
1509 struct uvc_entity *entity, *prev;
c0efd232 1510
4057ac6c 1511 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
ff924203 1512
4057ac6c
LP		 1513 entity = term;
1514 prev = NULL;
8e113595 1515
4057ac6c
LP		 1516 while (entity != NULL) {
1517 /* Entity must not be part of an existing chain */
8e113595
LP		 1518 if (entity->chain.next || entity->chain.prev) {
1519 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
4057ac6c 1520 "entity %d already in chain.\n", entity->id);
8e113595 1521 return -EINVAL;
c0efd232
LP		 1522 }
1523
1524 /* Process entity */
8e113595
LP		 1525 if (uvc_scan_chain_entity(chain, entity) < 0)
1526 return -EINVAL;
c0efd232
LP		 1527
1528 /* Forward scan */
8e113595
LP		 1529 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1530 return -EINVAL;
c0efd232 1531
c0efd232 1532 /* Backward scan */
4057ac6c
LP		 1533 prev = entity;
1534 if (uvc_scan_chain_backward(chain, &entity) < 0)
1535 return -EINVAL;
c0efd232
LP		 1536 }
1537
8e113595
LP		 1538 return 0;
1539}
1540
6241d8ca
LP		 1541static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1542 char *buffer)
8e113595
LP		 1543{
1544 struct uvc_entity *term;
1545 unsigned int nterms = 0;
1546 char *p = buffer;
1547
1548 list_for_each_entry(term, terms, chain) {
6241d8ca
LP		 1549 if (!UVC_ENTITY_IS_TERM(term) ||
1550 UVC_TERM_DIRECTION(term) != dir)
1551 continue;
1552
1553 if (nterms)
8e113595 1554 p += sprintf(p, ",");
6241d8ca
LP		 1555 if (++nterms >= 4) {
1556 p += sprintf(p, "...");
1557 break;
8e113595 1558 }
6241d8ca 1559 p += sprintf(p, "%u", term->id);
ff924203 1560 }
c0efd232 1561
8e113595
LP		 1562 return p - buffer;
1563}
1564
1565static const char *uvc_print_chain(struct uvc_video_chain *chain)
1566{
1567 static char buffer[43];
1568 char *p = buffer;
1569
6241d8ca 1570 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
8e113595 1571 p += sprintf(p, " -> ");
6241d8ca 1572 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
8e113595
LP		 1573
1574 return buffer;
c0efd232
LP		 1575}
1576
1577/*
35f02a68 1578 * Scan the device for video chains and register video devices.
c0efd232 1579 *
8e113595 1580 * Chains are scanned starting at their output terminals and walked backwards.
c0efd232 1581 */
35f02a68 1582static int uvc_scan_device(struct uvc_device *dev)
c0efd232 1583{
8e113595 1584 struct uvc_video_chain *chain;
c0efd232 1585 struct uvc_entity *term;
c0efd232 1586
c0efd232 1587 list_for_each_entry(term, &dev->entities, list) {
8e113595 1588 if (!UVC_ENTITY_IS_OTERM(term))
c0efd232
LP		 1589 continue;
1590
8e113595
LP		 1591 /* If the terminal is already included in a chain, skip it.
1592 * This can happen for chains that have multiple output
1593 * terminals, where all output terminals beside the first one
1594 * will be inserted in the chain in forward scans.
1595 */
1596 if (term->chain.next || term->chain.prev)
c0efd232
LP		 1597 continue;
1598
8e113595
LP		 1599 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1600 if (chain == NULL)
1601 return -ENOMEM;
1602
6241d8ca 1603 INIT_LIST_HEAD(&chain->entities);
8e113595
LP		 1604 mutex_init(&chain->ctrl_mutex);
1605 chain->dev = dev;
0550513c 1606 v4l2_prio_init(&chain->prio);
8e113595 1607
8be8ec6e
LP		 1608 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1609
8e113595
LP		 1610 if (uvc_scan_chain(chain, term) < 0) {
1611 kfree(chain);
1612 continue;
c0efd232 1613 }
8e113595
LP		 1614
1615 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1616 uvc_print_chain(chain));
1617
1618 list_add_tail(&chain->list, &dev->chains);
c0efd232
LP		 1619 }
1620
8e113595 1621 if (list_empty(&dev->chains)) {
c0efd232
LP		 1622 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1623 return -1;
1624 }
1625
c0efd232
LP		 1626 return 0;
1627}
1628
8e113595
LP		 1629/* ------------------------------------------------------------------------
1630 * Video device registration and unregistration
1631 */
1632
716fdee1
LP		 1633/*
1634 * Delete the UVC device.
1635 *
1636 * Called by the kernel when the last reference to the uvc_device structure
1637 * is released.
1638 *
1639 * As this function is called after or during disconnect(), all URBs have
1640 * already been canceled by the USB core. There is no need to kill the
1641 * interrupt URB manually.
1642 */
1643static void uvc_delete(struct uvc_device *dev)
1644{
1645 struct list_head *p, *n;
1646
716fdee1
LP		 1647 uvc_status_cleanup(dev);
1648 uvc_ctrl_cleanup_device(dev);
1649
2228d80d
TI		 1650 usb_put_intf(dev->intf);
1651 usb_put_dev(dev->udev);
1652
5a254d75
LP		 1653 if (dev->vdev.dev)
1654 v4l2_device_unregister(&dev->vdev);
1655#ifdef CONFIG_MEDIA_CONTROLLER
1656 if (media_devnode_is_registered(&dev->mdev.devnode))
1657 media_device_unregister(&dev->mdev);
1658#endif
1659
716fdee1
LP		 1660 list_for_each_safe(p, n, &dev->chains) {
1661 struct uvc_video_chain *chain;
1662 chain = list_entry(p, struct uvc_video_chain, list);
1663 kfree(chain);
1664 }
1665
1666 list_for_each_safe(p, n, &dev->entities) {
1667 struct uvc_entity *entity;
1668 entity = list_entry(p, struct uvc_entity, list);
4ffc2d89
LP		 1669#ifdef CONFIG_MEDIA_CONTROLLER
1670 uvc_mc_cleanup_entity(entity);
1671#endif
8a65a948
LP		 1672 if (entity->vdev) {
1673 video_device_release(entity->vdev);
1674 entity->vdev = NULL;
1675 }
716fdee1
LP		 1676 kfree(entity);
1677 }
1678
1679 list_for_each_safe(p, n, &dev->streams) {
1680 struct uvc_streaming *streaming;
1681 streaming = list_entry(p, struct uvc_streaming, list);
1682 usb_driver_release_interface(&uvc_driver.driver,
1683 streaming->intf);
1684 usb_put_intf(streaming->intf);
1685 kfree(streaming->format);
1686 kfree(streaming->header.bmaControls);
1687 kfree(streaming);
1688 }
1689
1690 kfree(dev);
1691}
1692
1693static void uvc_release(struct video_device *vdev)
1694{
1695 struct uvc_streaming *stream = video_get_drvdata(vdev);
1696 struct uvc_device *dev = stream->dev;
1697
716fdee1
LP		 1698 /* Decrement the registered streams count and delete the device when it
1699 * reaches zero.
1700 */
1701 if (atomic_dec_and_test(&dev->nstreams))
1702 uvc_delete(dev);
1703}
1704
8e113595
LP		 1705/*
1706 * Unregister the video devices.
1707 */
1708static void uvc_unregister_video(struct uvc_device *dev)
1709{
1710 struct uvc_streaming *stream;
1711
716fdee1
LP		 1712 /* Unregistering all video devices might result in uvc_delete() being
1713 * called from inside the loop if there's no open file handle. To avoid
1714 * that, increment the stream count before iterating over the streams
1715 * and decrement it when done.
1716 */
1717 atomic_inc(&dev->nstreams);
1718
8e113595
LP		 1719 list_for_each_entry(stream, &dev->streams, list) {
1720 if (stream->vdev == NULL)
1721 continue;
1722
716fdee1 1723 video_unregister_device(stream->vdev);
8e113595 1724 stream->vdev = NULL;
edbaa398
AF		 1725
1726 uvc_debugfs_cleanup_stream(stream);
8e113595 1727 }
716fdee1
LP		 1728
1729 /* Decrement the stream count and call uvc_delete explicitly if there
1730 * are no stream left.
1731 */
1732 if (atomic_dec_and_test(&dev->nstreams))
1733 uvc_delete(dev);
8e113595
LP		 1734}
1735
1736static int uvc_register_video(struct uvc_device *dev,
1737 struct uvc_streaming *stream)
1738{
1739 struct video_device *vdev;
1740 int ret;
1741
b83bba24
LP		 1742 /* Initialize the video buffers queue. */
1743 ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
1744 if (ret)
1745 return ret;
1746
8e113595
LP		 1747 /* Initialize the streaming interface with default streaming
1748 * parameters.
1749 */
1750 ret = uvc_video_init(stream);
1751 if (ret < 0) {
1752 uvc_printk(KERN_ERR, "Failed to initialize the device "
1753 "(%d).\n", ret);
1754 return ret;
1755 }
1756
edbaa398
AF		 1757 uvc_debugfs_init_stream(stream);
1758
8e113595
LP		 1759 /* Register the device with V4L. */
1760 vdev = video_device_alloc();
1761 if (vdev == NULL) {
1762 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n",
1763 ret);
1764 return -ENOMEM;
1765 }
1766
1767 /* We already hold a reference to dev->udev. The video device will be
1768 * unregistered before the reference is released, so we don't need to
1769 * get another one.
1770 */
5a254d75 1771 vdev->v4l2_dev = &dev->vdev;
8e113595 1772 vdev->fops = &uvc_fops;
d5e90b7a 1773 vdev->ioctl_ops = &uvc_ioctl_ops;
716fdee1 1774 vdev->release = uvc_release;
0550513c 1775 vdev->prio = &stream->chain->prio;
954f340f
HV		 1776 if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1777 vdev->vfl_dir = VFL_DIR_TX;
8e113595
LP		 1778 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1779
1780 /* Set the driver data before calling video_register_device, otherwise
1781 * uvc_v4l2_open might race us.
1782 */
1783 stream->vdev = vdev;
1784 video_set_drvdata(vdev, stream);
1785
1786 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1787 if (ret < 0) {
1788 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
1789 ret);
1790 stream->vdev = NULL;
1791 video_device_release(vdev);
1792 return ret;
1793 }
1794
f887e99a
LP		 1795 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1796 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE;
1797 else
1798 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1799
716fdee1 1800 atomic_inc(&dev->nstreams);
8e113595
LP		 1801 return 0;
1802}
1803
1804/*
1805 * Register all video devices in all chains.
1806 */
1807static int uvc_register_terms(struct uvc_device *dev,
6241d8ca 1808 struct uvc_video_chain *chain)
8e113595
LP		 1809{
1810 struct uvc_streaming *stream;
1811 struct uvc_entity *term;
1812 int ret;
1813
6241d8ca 1814 list_for_each_entry(term, &chain->entities, chain) {
8e113595
LP		 1815 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1816 continue;
1817
1818 stream = uvc_stream_by_id(dev, term->id);
1819 if (stream == NULL) {
1820 uvc_printk(KERN_INFO, "No streaming interface found "
1821 "for terminal %u.", term->id);
1822 continue;
1823 }
1824
1825 stream->chain = chain;
1826 ret = uvc_register_video(dev, stream);
1827 if (ret < 0)
1828 return ret;
8a65a948
LP		 1829
1830 term->vdev = stream->vdev;
8e113595
LP		 1831 }
1832
1833 return 0;
1834}
1835
1836static int uvc_register_chains(struct uvc_device *dev)
1837{
1838 struct uvc_video_chain *chain;
1839 int ret;
1840
1841 list_for_each_entry(chain, &dev->chains, list) {
6241d8ca 1842 ret = uvc_register_terms(dev, chain);
8e113595
LP		 1843 if (ret < 0)
1844 return ret;
4ffc2d89
LP		 1845
1846#ifdef CONFIG_MEDIA_CONTROLLER
1847 ret = uvc_mc_register_entities(chain);
1848 if (ret < 0) {
1849 uvc_printk(KERN_INFO, "Failed to register entites "
1850 "(%d).\n", ret);
1851 }
1852#endif
8e113595
LP		 1853 }
1854
1855 return 0;
1856}
1857
1858/* ------------------------------------------------------------------------
1859 * USB probe, disconnect, suspend and resume
1860 */
1861
c0efd232
LP		 1862static int uvc_probe(struct usb_interface *intf,
1863 const struct usb_device_id *id)
1864{
1865 struct usb_device *udev = interface_to_usbdev(intf);
1866 struct uvc_device *dev;
1867 int ret;
1868
1869 if (id->idVendor && id->idProduct)
1870 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1871 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1872 id->idProduct);
1873 else
1874 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1875 udev->devpath);
1876
2c2d264b 1877 /* Allocate memory for the device and initialize it. */
c0efd232
LP		 1878 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1879 return -ENOMEM;
1880
1881 INIT_LIST_HEAD(&dev->entities);
8e113595 1882 INIT_LIST_HEAD(&dev->chains);
35f02a68 1883 INIT_LIST_HEAD(&dev->streams);
716fdee1 1884 atomic_set(&dev->nstreams, 0);
8fb91b33 1885 atomic_set(&dev->nmappings, 0);
17706f56 1886 mutex_init(&dev->lock);
c0efd232
LP		 1887
1888 dev->udev = usb_get_dev(udev);
1889 dev->intf = usb_get_intf(intf);
1890 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
73de3592
LP		 1891 dev->quirks = (uvc_quirks_param == -1)
1892 ? id->driver_info : uvc_quirks_param;
c0efd232
LP		 1893
1894 if (udev->product != NULL)
d0ebf307 1895 strlcpy(dev->name, udev->product, sizeof dev->name);
c0efd232
LP		 1896 else
1897 snprintf(dev->name, sizeof dev->name,
1898 "UVC Camera (%04x:%04x)",
1899 le16_to_cpu(udev->descriptor.idVendor),
1900 le16_to_cpu(udev->descriptor.idProduct));
1901
2c2d264b 1902 /* Parse the Video Class control descriptor. */
c0efd232
LP		 1903 if (uvc_parse_control(dev) < 0) {
1904 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1905 "descriptors.\n");
1906 goto error;
1907 }
1908
fba4578e 1909 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
c0efd232
LP		 1910 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1911 udev->product ? udev->product : "<unnamed>",
1912 le16_to_cpu(udev->descriptor.idVendor),
1913 le16_to_cpu(udev->descriptor.idProduct));
1914
73de3592
LP		 1915 if (dev->quirks != id->driver_info) {
1916 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
1917 "parameter for testing purpose.\n", dev->quirks);
c0efd232
LP		 1918 uvc_printk(KERN_INFO, "Please report required quirks to the "
1919 "linux-uvc-devel mailing list.\n");
1920 }
1921
5a254d75
LP		 1922 /* Register the media and V4L2 devices. */
1923#ifdef CONFIG_MEDIA_CONTROLLER
1924 dev->mdev.dev = &intf->dev;
1925 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
1926 if (udev->serial)
1927 strlcpy(dev->mdev.serial, udev->serial,
1928 sizeof(dev->mdev.serial));
1929 strcpy(dev->mdev.bus_info, udev->devpath);
1930 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
fd3e5824 1931 dev->mdev.driver_version = LINUX_VERSION_CODE;
5a254d75
LP		 1932 if (media_device_register(&dev->mdev) < 0)
1933 goto error;
1934
1935 dev->vdev.mdev = &dev->mdev;
1936#endif
1937 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
1938 goto error;
1939
2c2d264b 1940 /* Initialize controls. */
c0efd232
LP		 1941 if (uvc_ctrl_init_device(dev) < 0)
1942 goto error;
1943
8e113595 1944 /* Scan the device for video chains. */
35f02a68 1945 if (uvc_scan_device(dev) < 0)
c0efd232
LP		 1946 goto error;
1947
5a254d75 1948 /* Register video device nodes. */
8e113595
LP		 1949 if (uvc_register_chains(dev) < 0)
1950 goto error;
1951
2c2d264b 1952 /* Save our data pointer in the interface data. */
c0efd232
LP		 1953 usb_set_intfdata(intf, dev);
1954
2c2d264b 1955 /* Initialize the interrupt URB. */
c0efd232
LP		 1956 if ((ret = uvc_status_init(dev)) < 0) {
1957 uvc_printk(KERN_INFO, "Unable to initialize the status "
1958 "endpoint (%d), status interrupt will not be "
1959 "supported.\n", ret);
1960 }
1961
1962 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
3dae8b41 1963 usb_enable_autosuspend(udev);
c0efd232
LP		 1964 return 0;
1965
1966error:
716fdee1 1967 uvc_unregister_video(dev);
c0efd232
LP		 1968 return -ENODEV;
1969}
1970
1971static void uvc_disconnect(struct usb_interface *intf)
1972{
1973 struct uvc_device *dev = usb_get_intfdata(intf);
1974
1975 /* Set the USB interface data to NULL. This can be done outside the
1976 * lock, as there's no other reader.
1977 */
1978 usb_set_intfdata(intf, NULL);
1979
b482d923
LP		 1980 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1981 UVC_SC_VIDEOSTREAMING)
c0efd232
LP		 1982 return;
1983
c0efd232 1984 dev->state |= UVC_DEV_DISCONNECTED;
a9e28585 1985
716fdee1 1986 uvc_unregister_video(dev);
c0efd232
LP		 1987}
1988
1989static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1990{
1991 struct uvc_device *dev = usb_get_intfdata(intf);
35f02a68 1992 struct uvc_streaming *stream;
c0efd232
LP		 1993
1994 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1995 intf->cur_altsetting->desc.bInterfaceNumber);
1996
1997 /* Controls are cached on the fly so they don't need to be saved. */
b482d923 1998 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
17706f56
LP		 1999 UVC_SC_VIDEOCONTROL) {
2000 mutex_lock(&dev->lock);
2001 if (dev->users)
2002 uvc_status_stop(dev);
2003 mutex_unlock(&dev->lock);
2004 return 0;
2005 }
c0efd232 2006
35f02a68
LP		 2007 list_for_each_entry(stream, &dev->streams, list) {
2008 if (stream->intf == intf)
2009 return uvc_video_suspend(stream);
c0efd232
LP		 2010 }
2011
35f02a68
LP		 2012 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2013 "mismatch.\n");
2014 return -EINVAL;
c0efd232
LP		 2015}
2016
9b0ae867 2017static int __uvc_resume(struct usb_interface *intf, int reset)
c0efd232
LP		 2018{
2019 struct uvc_device *dev = usb_get_intfdata(intf);
35f02a68 2020 struct uvc_streaming *stream;
b83bba24 2021 int ret = 0;
c0efd232
LP		 2022
2023 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2024 intf->cur_altsetting->desc.bInterfaceNumber);
2025
b482d923
LP		 2026 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2027 UVC_SC_VIDEOCONTROL) {
17706f56 2028 if (reset) {
17e1319f 2029 ret = uvc_ctrl_restore_values(dev);
7564f67d
HV		 2030 if (ret < 0)
2031 return ret;
2032 }
c0efd232 2033
17706f56
LP		 2034 mutex_lock(&dev->lock);
2035 if (dev->users)
2036 ret = uvc_status_start(dev, GFP_NOIO);
2037 mutex_unlock(&dev->lock);
2038
2039 return ret;
c0efd232
LP		 2040 }
2041
35f02a68 2042 list_for_each_entry(stream, &dev->streams, list) {
b83bba24
LP		 2043 if (stream->intf == intf) {
2044 ret = uvc_video_resume(stream, reset);
2045 if (ret < 0)
0da4ab98
LP		 2046 uvc_queue_streamoff(&stream->queue,
2047 stream->queue.queue.type);
b83bba24
LP		 2048 return ret;
2049 }
c0efd232
LP		 2050 }
2051
35f02a68
LP		 2052 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2053 "mismatch.\n");
2054 return -EINVAL;
c0efd232
LP		 2055}
2056
9b0ae867
LP		 2057static int uvc_resume(struct usb_interface *intf)
2058{
2059 return __uvc_resume(intf, 0);
2060}
2061
2062static int uvc_reset_resume(struct usb_interface *intf)
2063{
2064 return __uvc_resume(intf, 1);
2065}
2066
310fe524
LP		 2067/* ------------------------------------------------------------------------
2068 * Module parameters
2069 */
2070
2071static int uvc_clock_param_get(char *buffer, struct kernel_param *kp)
2072{
2073 if (uvc_clock_param == CLOCK_MONOTONIC)
2074 return sprintf(buffer, "CLOCK_MONOTONIC");
2075 else
2076 return sprintf(buffer, "CLOCK_REALTIME");
2077}
2078
2079static int uvc_clock_param_set(const char *val, struct kernel_param *kp)
2080{
2081 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2082 val += strlen("clock_");
2083
2084 if (strcasecmp(val, "monotonic") == 0)
2085 uvc_clock_param = CLOCK_MONOTONIC;
2086 else if (strcasecmp(val, "realtime") == 0)
2087 uvc_clock_param = CLOCK_REALTIME;
2088 else
2089 return -EINVAL;
2090
2091 return 0;
2092}
2093
2094module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2095 &uvc_clock_param, S_IRUGO|S_IWUSR);
2096MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2097module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2098MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2099module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2100MODULE_PARM_DESC(quirks, "Forced device quirks");
2101module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2102MODULE_PARM_DESC(trace, "Trace level bitmask");
2103module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2104MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2105
c0efd232
LP		 2106/* ------------------------------------------------------------------------
2107 * Driver initialization and cleanup
2108 */
2109
2110/*
2111 * The Logitech cameras listed below have their interface class set to
2112 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2113 * though they are compliant.
2114 */
2115static struct usb_device_id uvc_ids[] = {
4eb2697e
LP		 2116 /* LogiLink Wireless Webcam */
2117 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2118 | USB_DEVICE_ID_MATCH_INT_INFO,
2119 .idVendor = 0x0416,
2120 .idProduct = 0xa91a,
2121 .bInterfaceClass = USB_CLASS_VIDEO,
2122 .bInterfaceSubClass = 1,
2123 .bInterfaceProtocol = 0,
2124 .driver_info = UVC_QUIRK_PROBE_MINMAX },
bce039c0
LP		 2125 /* Genius eFace 2025 */
2126 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2127 | USB_DEVICE_ID_MATCH_INT_INFO,
2128 .idVendor = 0x0458,
2129 .idProduct = 0x706e,
2130 .bInterfaceClass = USB_CLASS_VIDEO,
2131 .bInterfaceSubClass = 1,
2132 .bInterfaceProtocol = 0,
2133 .driver_info = UVC_QUIRK_PROBE_MINMAX },
c0efd232
LP		 2134 /* Microsoft Lifecam NX-6000 */
2135 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2136 | USB_DEVICE_ID_MATCH_INT_INFO,
2137 .idVendor = 0x045e,
2138 .idProduct = 0x00f8,
2139 .bInterfaceClass = USB_CLASS_VIDEO,
2140 .bInterfaceSubClass = 1,
2141 .bInterfaceProtocol = 0,
2142 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1558ec83
LP		 2143 /* Microsoft Lifecam NX-3000 */
2144 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2145 | USB_DEVICE_ID_MATCH_INT_INFO,
2146 .idVendor = 0x045e,
2147 .idProduct = 0x0721,
2148 .bInterfaceClass = USB_CLASS_VIDEO,
2149 .bInterfaceSubClass = 1,
2150 .bInterfaceProtocol = 0,
2151 .driver_info = UVC_QUIRK_PROBE_DEF },
c0efd232
LP		 2152 /* Microsoft Lifecam VX-7000 */
2153 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2154 | USB_DEVICE_ID_MATCH_INT_INFO,
2155 .idVendor = 0x045e,
2156 .idProduct = 0x0723,
2157 .bInterfaceClass = USB_CLASS_VIDEO,
2158 .bInterfaceSubClass = 1,
2159 .bInterfaceProtocol = 0,
2160 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2161 /* Logitech Quickcam Fusion */
2162 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2163 | USB_DEVICE_ID_MATCH_INT_INFO,
2164 .idVendor = 0x046d,
2165 .idProduct = 0x08c1,
2166 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2167 .bInterfaceSubClass = 1,
2168 .bInterfaceProtocol = 0 },
2169 /* Logitech Quickcam Orbit MP */
2170 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2171 | USB_DEVICE_ID_MATCH_INT_INFO,
2172 .idVendor = 0x046d,
2173 .idProduct = 0x08c2,
2174 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2175 .bInterfaceSubClass = 1,
2176 .bInterfaceProtocol = 0 },
2177 /* Logitech Quickcam Pro for Notebook */
2178 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2179 | USB_DEVICE_ID_MATCH_INT_INFO,
2180 .idVendor = 0x046d,
2181 .idProduct = 0x08c3,
2182 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2183 .bInterfaceSubClass = 1,
2184 .bInterfaceProtocol = 0 },
2185 /* Logitech Quickcam Pro 5000 */
2186 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2187 | USB_DEVICE_ID_MATCH_INT_INFO,
2188 .idVendor = 0x046d,
2189 .idProduct = 0x08c5,
2190 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2191 .bInterfaceSubClass = 1,
2192 .bInterfaceProtocol = 0 },
2193 /* Logitech Quickcam OEM Dell Notebook */
2194 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2195 | USB_DEVICE_ID_MATCH_INT_INFO,
2196 .idVendor = 0x046d,
2197 .idProduct = 0x08c6,
2198 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2199 .bInterfaceSubClass = 1,
2200 .bInterfaceProtocol = 0 },
2201 /* Logitech Quickcam OEM Cisco VT Camera II */
2202 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2203 | USB_DEVICE_ID_MATCH_INT_INFO,
2204 .idVendor = 0x046d,
2205 .idProduct = 0x08c7,
2206 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2207 .bInterfaceSubClass = 1,
2208 .bInterfaceProtocol = 0 },
17e1319f
WM		 2209 /* Logitech HD Pro Webcam C920 */
2210 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2211 | USB_DEVICE_ID_MATCH_INT_INFO,
2212 .idVendor = 0x046d,
2213 .idProduct = 0x082d,
2214 .bInterfaceClass = USB_CLASS_VIDEO,
2215 .bInterfaceSubClass = 1,
2216 .bInterfaceProtocol = 0,
2217 .driver_info = UVC_QUIRK_RESTORE_CTRLS_ON_INIT },
86d8b6ab
LP		 2218 /* Chicony CNF7129 (Asus EEE 100HE) */
2219 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2220 | USB_DEVICE_ID_MATCH_INT_INFO,
2221 .idVendor = 0x04f2,
2222 .idProduct = 0xb071,
2223 .bInterfaceClass = USB_CLASS_VIDEO,
2224 .bInterfaceSubClass = 1,
2225 .bInterfaceProtocol = 0,
2226 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE },
f61d1d8a
LP		 2227 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2228 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2229 | USB_DEVICE_ID_MATCH_INT_INFO,
2230 .idVendor = 0x058f,
2231 .idProduct = 0x3820,
2232 .bInterfaceClass = USB_CLASS_VIDEO,
2233 .bInterfaceSubClass = 1,
2234 .bInterfaceProtocol = 0,
2235 .driver_info = UVC_QUIRK_PROBE_MINMAX },
3efe2f1b
LP		 2236 /* Dell XPS m1530 */
2237 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2238 | USB_DEVICE_ID_MATCH_INT_INFO,
2239 .idVendor = 0x05a9,
2240 .idProduct = 0x2640,
2241 .bInterfaceClass = USB_CLASS_VIDEO,
89e0f248
JS		 2242 .bInterfaceSubClass = 1,
2243 .bInterfaceProtocol = 0,
2244 .driver_info = UVC_QUIRK_PROBE_DEF },
2245 /* Dell SP2008WFP Monitor */
2246 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2247 | USB_DEVICE_ID_MATCH_INT_INFO,
2248 .idVendor = 0x05a9,
2249 .idProduct = 0x2641,
2250 .bInterfaceClass = USB_CLASS_VIDEO,
3efe2f1b
LP		 2251 .bInterfaceSubClass = 1,
2252 .bInterfaceProtocol = 0,
2253 .driver_info = UVC_QUIRK_PROBE_DEF },
c2a273b2
JS		 2254 /* Dell Alienware X51 */
2255 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2256 | USB_DEVICE_ID_MATCH_INT_INFO,
2257 .idVendor = 0x05a9,
2258 .idProduct = 0x2643,
2259 .bInterfaceClass = USB_CLASS_VIDEO,
2260 .bInterfaceSubClass = 1,
2261 .bInterfaceProtocol = 0,
2262 .driver_info = UVC_QUIRK_PROBE_DEF },
afcf44c7
KM		 2263 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2264 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2265 | USB_DEVICE_ID_MATCH_INT_INFO,
2266 .idVendor = 0x05a9,
2267 .idProduct = 0x264a,
2268 .bInterfaceClass = USB_CLASS_VIDEO,
2269 .bInterfaceSubClass = 1,
2270 .bInterfaceProtocol = 0,
2271 .driver_info = UVC_QUIRK_PROBE_DEF },
62ea864f
PF		 2272 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2273 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2274 | USB_DEVICE_ID_MATCH_INT_INFO,
2275 .idVendor = 0x05a9,
2276 .idProduct = 0x7670,
2277 .bInterfaceClass = USB_CLASS_VIDEO,
2278 .bInterfaceSubClass = 1,
2279 .bInterfaceProtocol = 0,
2280 .driver_info = UVC_QUIRK_PROBE_DEF },
c0efd232 2281 /* Apple Built-In iSight */
2c2d264b 2282 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
c0efd232
LP		 2283 | USB_DEVICE_ID_MATCH_INT_INFO,
2284 .idVendor = 0x05ac,
2285 .idProduct = 0x8501,
2c2d264b
LP		 2286 .bInterfaceClass = USB_CLASS_VIDEO,
2287 .bInterfaceSubClass = 1,
2288 .bInterfaceProtocol = 0,
c0efd232
LP		 2289 .driver_info = UVC_QUIRK_PROBE_MINMAX
2290 | UVC_QUIRK_BUILTIN_ISIGHT },
949d9264
KS		 2291 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2292 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2293 | USB_DEVICE_ID_MATCH_INT_INFO,
2294 .idVendor = 0x05c8,
2295 .idProduct = 0x0403,
2296 .bInterfaceClass = USB_CLASS_VIDEO,
2297 .bInterfaceSubClass = 1,
2298 .bInterfaceProtocol = 0,
2299 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
c0efd232 2300 /* Genesys Logic USB 2.0 PC Camera */
2c2d264b 2301 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
c0efd232 2302 | USB_DEVICE_ID_MATCH_INT_INFO,
2c2d264b
LP		 2303 .idVendor = 0x05e3,
2304 .idProduct = 0x0505,
2305 .bInterfaceClass = USB_CLASS_VIDEO,
2306 .bInterfaceSubClass = 1,
2307 .bInterfaceProtocol = 0,
2308 .driver_info = UVC_QUIRK_STREAM_NO_FID },
e01a2344
LP		 2309 /* Hercules Classic Silver */
2310 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2311 | USB_DEVICE_ID_MATCH_INT_INFO,
2312 .idVendor = 0x06f8,
2313 .idProduct = 0x300c,
2314 .bInterfaceClass = USB_CLASS_VIDEO,
2315 .bInterfaceSubClass = 1,
2316 .bInterfaceProtocol = 0,
2317 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
d79cd839
LP		 2318 /* ViMicro Vega */
2319 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2320 | USB_DEVICE_ID_MATCH_INT_INFO,
2321 .idVendor = 0x0ac8,
2322 .idProduct = 0x332d,
2323 .bInterfaceClass = USB_CLASS_VIDEO,
2324 .bInterfaceSubClass = 1,
2325 .bInterfaceProtocol = 0,
2326 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2327 /* ViMicro - Minoru3D */
2328 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2329 | USB_DEVICE_ID_MATCH_INT_INFO,
2330 .idVendor = 0x0ac8,
2331 .idProduct = 0x3410,
2332 .bInterfaceClass = USB_CLASS_VIDEO,
2333 .bInterfaceSubClass = 1,
2334 .bInterfaceProtocol = 0,
2335 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2336 /* ViMicro Venus - Minoru3D */
2337 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
50144aee
LP		 2338 | USB_DEVICE_ID_MATCH_INT_INFO,
2339 .idVendor = 0x0ac8,
d79cd839 2340 .idProduct = 0x3420,
50144aee
LP		 2341 .bInterfaceClass = USB_CLASS_VIDEO,
2342 .bInterfaceSubClass = 1,
2343 .bInterfaceProtocol = 0,
2344 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
d584b838
LP		 2345 /* Ophir Optronics - SPCAM 620U */
2346 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2347 | USB_DEVICE_ID_MATCH_INT_INFO,
2348 .idVendor = 0x0bd3,
2349 .idProduct = 0x0555,
2350 .bInterfaceClass = USB_CLASS_VIDEO,
2351 .bInterfaceSubClass = 1,
2352 .bInterfaceProtocol = 0,
2353 .driver_info = UVC_QUIRK_PROBE_MINMAX },
c0efd232
LP		 2354 /* MT6227 */
2355 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2356 | USB_DEVICE_ID_MATCH_INT_INFO,
2357 .idVendor = 0x0e8d,
2358 .idProduct = 0x0004,
2359 .bInterfaceClass = USB_CLASS_VIDEO,
2360 .bInterfaceSubClass = 1,
2361 .bInterfaceProtocol = 0,
bab6f66c
LP		 2362 .driver_info = UVC_QUIRK_PROBE_MINMAX
2363 | UVC_QUIRK_PROBE_DEF },
9275b32b
LP		 2364 /* IMC Networks (Medion Akoya) */
2365 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2366 | USB_DEVICE_ID_MATCH_INT_INFO,
2367 .idVendor = 0x13d3,
2368 .idProduct = 0x5103,
2369 .bInterfaceClass = USB_CLASS_VIDEO,
2370 .bInterfaceSubClass = 1,
2371 .bInterfaceProtocol = 0,
2372 .driver_info = UVC_QUIRK_STREAM_NO_FID },
d1787b1f
LP		 2373 /* JMicron USB2.0 XGA WebCam */
2374 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2375 | USB_DEVICE_ID_MATCH_INT_INFO,
2376 .idVendor = 0x152d,
2377 .idProduct = 0x0310,
2378 .bInterfaceClass = USB_CLASS_VIDEO,
2379 .bInterfaceSubClass = 1,
2380 .bInterfaceProtocol = 0,
2381 .driver_info = UVC_QUIRK_PROBE_MINMAX },
c0efd232
LP		 2382 /* Syntek (HP Spartan) */
2383 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2384 | USB_DEVICE_ID_MATCH_INT_INFO,
2385 .idVendor = 0x174f,
2386 .idProduct = 0x5212,
2387 .bInterfaceClass = USB_CLASS_VIDEO,
2388 .bInterfaceSubClass = 1,
2389 .bInterfaceProtocol = 0,
25e69850 2390 .driver_info = UVC_QUIRK_STREAM_NO_FID },
562f0fed
LP		 2391 /* Syntek (Samsung Q310) */
2392 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2393 | USB_DEVICE_ID_MATCH_INT_INFO,
2394 .idVendor = 0x174f,
2395 .idProduct = 0x5931,
2396 .bInterfaceClass = USB_CLASS_VIDEO,
2397 .bInterfaceSubClass = 1,
2398 .bInterfaceProtocol = 0,
2399 .driver_info = UVC_QUIRK_STREAM_NO_FID },
f129b03b
LP		 2400 /* Syntek (Packard Bell EasyNote MX52 */
2401 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2402 | USB_DEVICE_ID_MATCH_INT_INFO,
2403 .idVendor = 0x174f,
2404 .idProduct = 0x8a12,
2405 .bInterfaceClass = USB_CLASS_VIDEO,
2406 .bInterfaceSubClass = 1,
2407 .bInterfaceProtocol = 0,
2408 .driver_info = UVC_QUIRK_STREAM_NO_FID },
f61d1d8a 2409 /* Syntek (Asus F9SG) */
25e69850
LP		 2410 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2411 | USB_DEVICE_ID_MATCH_INT_INFO,
2412 .idVendor = 0x174f,
2413 .idProduct = 0x8a31,
2414 .bInterfaceClass = USB_CLASS_VIDEO,
2415 .bInterfaceSubClass = 1,
2416 .bInterfaceProtocol = 0,
c0efd232
LP		 2417 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2418 /* Syntek (Asus U3S) */
2419 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2420 | USB_DEVICE_ID_MATCH_INT_INFO,
2421 .idVendor = 0x174f,
2422 .idProduct = 0x8a33,
2423 .bInterfaceClass = USB_CLASS_VIDEO,
2424 .bInterfaceSubClass = 1,
2425 .bInterfaceProtocol = 0,
2426 .driver_info = UVC_QUIRK_STREAM_NO_FID },
0ce566da
LP		 2427 /* Syntek (JAOtech Smart Terminal) */
2428 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2429 | USB_DEVICE_ID_MATCH_INT_INFO,
2430 .idVendor = 0x174f,
2431 .idProduct = 0x8a34,
2432 .bInterfaceClass = USB_CLASS_VIDEO,
2433 .bInterfaceSubClass = 1,
2434 .bInterfaceProtocol = 0,
2435 .driver_info = UVC_QUIRK_STREAM_NO_FID },
70092c26
LP		 2436 /* Miricle 307K */
2437 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2438 | USB_DEVICE_ID_MATCH_INT_INFO,
2439 .idVendor = 0x17dc,
2440 .idProduct = 0x0202,
2441 .bInterfaceClass = USB_CLASS_VIDEO,
2442 .bInterfaceSubClass = 1,
2443 .bInterfaceProtocol = 0,
2444 .driver_info = UVC_QUIRK_STREAM_NO_FID },
849a3aba 2445 /* Lenovo Thinkpad SL400/SL500 */
2f38483b
LP		 2446 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2447 | USB_DEVICE_ID_MATCH_INT_INFO,
2448 .idVendor = 0x17ef,
2449 .idProduct = 0x480b,
2450 .bInterfaceClass = USB_CLASS_VIDEO,
2451 .bInterfaceSubClass = 1,
2452 .bInterfaceProtocol = 0,
2453 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2d2bf2a3
LP		 2454 /* Aveo Technology USB 2.0 Camera */
2455 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2456 | USB_DEVICE_ID_MATCH_INT_INFO,
2457 .idVendor = 0x1871,
2458 .idProduct = 0x0306,
2459 .bInterfaceClass = USB_CLASS_VIDEO,
2460 .bInterfaceSubClass = 1,
2461 .bInterfaceProtocol = 0,
5bdf1377
LP		 2462 .driver_info = UVC_QUIRK_PROBE_MINMAX
2463 | UVC_QUIRK_PROBE_EXTRAFIELDS },
fe652471
LP		 2464 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2465 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2466 | USB_DEVICE_ID_MATCH_INT_INFO,
2467 .idVendor = 0x1871,
2468 .idProduct = 0x0516,
2469 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2470 .bInterfaceSubClass = 1,
2471 .bInterfaceProtocol = 0 },
c0efd232
LP		 2472 /* Ecamm Pico iMage */
2473 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2474 | USB_DEVICE_ID_MATCH_INT_INFO,
2475 .idVendor = 0x18cd,
2476 .idProduct = 0xcafe,
2477 .bInterfaceClass = USB_CLASS_VIDEO,
2478 .bInterfaceSubClass = 1,
2479 .bInterfaceProtocol = 0,
2480 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
2bb00fe6
LP		 2481 /* Manta MM-353 Plako */
2482 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2483 | USB_DEVICE_ID_MATCH_INT_INFO,
2484 .idVendor = 0x18ec,
2485 .idProduct = 0x3188,
2486 .bInterfaceClass = USB_CLASS_VIDEO,
2487 .bInterfaceSubClass = 1,
2488 .bInterfaceProtocol = 0,
2489 .driver_info = UVC_QUIRK_PROBE_MINMAX },
ca4a3456
LP		 2490 /* FSC WebCam V30S */
2491 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2492 | USB_DEVICE_ID_MATCH_INT_INFO,
2493 .idVendor = 0x18ec,
2494 .idProduct = 0x3288,
2495 .bInterfaceClass = USB_CLASS_VIDEO,
2496 .bInterfaceSubClass = 1,
2497 .bInterfaceProtocol = 0,
2498 .driver_info = UVC_QUIRK_PROBE_MINMAX },
1e4d05bc
LP		 2499 /* Arkmicro unbranded */
2500 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2501 | USB_DEVICE_ID_MATCH_INT_INFO,
2502 .idVendor = 0x18ec,
2503 .idProduct = 0x3290,
2504 .bInterfaceClass = USB_CLASS_VIDEO,
2505 .bInterfaceSubClass = 1,
2506 .bInterfaceProtocol = 0,
2507 .driver_info = UVC_QUIRK_PROBE_DEF },
fd3e9f2f
AC		 2508 /* The Imaging Source USB CCD cameras */
2509 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2510 | USB_DEVICE_ID_MATCH_INT_INFO,
2511 .idVendor = 0x199e,
2512 .idProduct = 0x8102,
2513 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2514 .bInterfaceSubClass = 1,
2515 .bInterfaceProtocol = 0 },
c0efd232
LP		 2516 /* Bodelin ProScopeHR */
2517 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2518 | USB_DEVICE_ID_MATCH_DEV_HI
2519 | USB_DEVICE_ID_MATCH_INT_INFO,
2520 .idVendor = 0x19ab,
2521 .idProduct = 0x1000,
2522 .bcdDevice_hi = 0x0126,
2523 .bInterfaceClass = USB_CLASS_VIDEO,
2524 .bInterfaceSubClass = 1,
2525 .bInterfaceProtocol = 0,
2526 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
3bc766ad
LP		 2527 /* MSI StarCam 370i */
2528 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2529 | USB_DEVICE_ID_MATCH_INT_INFO,
2530 .idVendor = 0x1b3b,
2531 .idProduct = 0x2951,
2532 .bInterfaceClass = USB_CLASS_VIDEO,
2533 .bInterfaceSubClass = 1,
2534 .bInterfaceProtocol = 0,
2535 .driver_info = UVC_QUIRK_PROBE_MINMAX },
c0efd232
LP		 2536 /* SiGma Micro USB Web Camera */
2537 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2538 | USB_DEVICE_ID_MATCH_INT_INFO,
2539 .idVendor = 0x1c4f,
2540 .idProduct = 0x3000,
2541 .bInterfaceClass = USB_CLASS_VIDEO,
2542 .bInterfaceSubClass = 1,
2543 .bInterfaceProtocol = 0,
2544 .driver_info = UVC_QUIRK_PROBE_MINMAX
d732c44c 2545 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
e1b78a33
PZ		 2546 /* Oculus VR Positional Tracker DK2 */
2547 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2548 | USB_DEVICE_ID_MATCH_INT_INFO,
2549 .idVendor = 0x2833,
2550 .idProduct = 0x0201,
2551 .bInterfaceClass = USB_CLASS_VIDEO,
2552 .bInterfaceSubClass = 1,
2553 .bInterfaceProtocol = 0,
2554 .driver_info = UVC_QUIRK_FORCE_Y8 },
c0efd232
LP		 2555 /* Generic USB Video Class */
2556 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
2557 {}
2558};
2559
2560MODULE_DEVICE_TABLE(usb, uvc_ids);
2561
2562struct uvc_driver uvc_driver = {
2563 .driver = {
2564 .name = "uvcvideo",
2565 .probe = uvc_probe,
2566 .disconnect = uvc_disconnect,
2567 .suspend = uvc_suspend,
2568 .resume = uvc_resume,
9b0ae867 2569 .reset_resume = uvc_reset_resume,
c0efd232
LP		 2570 .id_table = uvc_ids,
2571 .supports_autosuspend = 1,
2572 },
2573};
2574
2575static int __init uvc_init(void)
2576{
edbaa398 2577 int ret;
c0efd232 2578
edbaa398
AF		 2579 uvc_debugfs_init();
2580
2581 ret = usb_register(&uvc_driver.driver);
2582 if (ret < 0) {
2583 uvc_debugfs_cleanup();
2584 return ret;
2585 }
2586
2587 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2588 return 0;
c0efd232
LP		 2589}
2590
2591static void __exit uvc_cleanup(void)
2592{
2593 usb_deregister(&uvc_driver.driver);
edbaa398 2594 uvc_debugfs_cleanup();
c0efd232
LP		 2595}
2596
2597module_init(uvc_init);
2598module_exit(uvc_cleanup);
2599
c0efd232
LP		 2600MODULE_AUTHOR(DRIVER_AUTHOR);
2601MODULE_DESCRIPTION(DRIVER_DESC);
2602MODULE_LICENSE("GPL");
2603MODULE_VERSION(DRIVER_VERSION);
f87086e3 2604
Linux kernel - Deliverables
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