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 = "IR 8-bit (L8_IR)",
104 .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR,
105 .fcc = V4L2_PIX_FMT_GREY,
106 },
107 {
108 .name = "Greyscale 10-bit (Y10 )",
109 .guid = UVC_GUID_FORMAT_Y10,
110 .fcc = V4L2_PIX_FMT_Y10,
111 },
112 {
113 .name = "Greyscale 12-bit (Y12 )",
114 .guid = UVC_GUID_FORMAT_Y12,
115 .fcc = V4L2_PIX_FMT_Y12,
116 },
117 {
118 .name = "Greyscale 16-bit (Y16 )",
119 .guid = UVC_GUID_FORMAT_Y16,
120 .fcc = V4L2_PIX_FMT_Y16,
121 },
122 {
123 .name = "BGGR Bayer (BY8 )",
124 .guid = UVC_GUID_FORMAT_BY8,
125 .fcc = V4L2_PIX_FMT_SBGGR8,
126 },
127 {
128 .name = "BGGR Bayer (BA81)",
129 .guid = UVC_GUID_FORMAT_BA81,
130 .fcc = V4L2_PIX_FMT_SBGGR8,
131 },
132 {
133 .name = "GBRG Bayer (GBRG)",
134 .guid = UVC_GUID_FORMAT_GBRG,
135 .fcc = V4L2_PIX_FMT_SGBRG8,
136 },
137 {
138 .name = "GRBG Bayer (GRBG)",
139 .guid = UVC_GUID_FORMAT_GRBG,
140 .fcc = V4L2_PIX_FMT_SGRBG8,
141 },
142 {
143 .name = "RGGB Bayer (RGGB)",
144 .guid = UVC_GUID_FORMAT_RGGB,
145 .fcc = V4L2_PIX_FMT_SRGGB8,
146 },
147 {
148 .name = "RGB565",
149 .guid = UVC_GUID_FORMAT_RGBP,
150 .fcc = V4L2_PIX_FMT_RGB565,
151 },
152 {
153 .name = "BGR 8:8:8 (BGR3)",
154 .guid = UVC_GUID_FORMAT_BGR3,
155 .fcc = V4L2_PIX_FMT_BGR24,
156 },
157 {
158 .name = "H.264",
159 .guid = UVC_GUID_FORMAT_H264,
160 .fcc = V4L2_PIX_FMT_H264,
161 },
162 {
163 .name = "Greyscale 8 L/R (Y8I)",
164 .guid = UVC_GUID_FORMAT_Y8I,
165 .fcc = V4L2_PIX_FMT_Y8I,
166 },
167 {
168 .name = "Greyscale 12 L/R (Y12I)",
169 .guid = UVC_GUID_FORMAT_Y12I,
170 .fcc = V4L2_PIX_FMT_Y12I,
171 },
172 {
173 .name = "Depth data 16-bit (Z16)",
174 .guid = UVC_GUID_FORMAT_Z16,
175 .fcc = V4L2_PIX_FMT_Z16,
176 },
177 {
178 .name = "Bayer 10-bit (SRGGB10P)",
179 .guid = UVC_GUID_FORMAT_RW10,
180 .fcc = V4L2_PIX_FMT_SRGGB10P,
181 },
182 {
183 .name = "Bayer 16-bit (SBGGR16)",
184 .guid = UVC_GUID_FORMAT_BG16,
185 .fcc = V4L2_PIX_FMT_SBGGR16,
186 },
187 {
188 .name = "Bayer 16-bit (SGBRG16)",
189 .guid = UVC_GUID_FORMAT_GB16,
190 .fcc = V4L2_PIX_FMT_SGBRG16,
191 },
192 {
193 .name = "Bayer 16-bit (SRGGB16)",
194 .guid = UVC_GUID_FORMAT_RG16,
195 .fcc = V4L2_PIX_FMT_SRGGB16,
196 },
197 {
198 .name = "Bayer 16-bit (SGRBG16)",
199 .guid = UVC_GUID_FORMAT_GR16,
200 .fcc = V4L2_PIX_FMT_SGRBG16,
201 },
202 {
203 .name = "Depth data 16-bit (Z16)",
204 .guid = UVC_GUID_FORMAT_INVZ,
205 .fcc = V4L2_PIX_FMT_Z16,
206 },
207 {
208 .name = "Greyscale 10-bit (Y10 )",
209 .guid = UVC_GUID_FORMAT_INVI,
210 .fcc = V4L2_PIX_FMT_Y10,
211 },
212 {
213 .name = "IR:Depth 26-bit (INZI)",
214 .guid = UVC_GUID_FORMAT_INZI,
215 .fcc = V4L2_PIX_FMT_INZI,
216 },
217 };
218
219 /* ------------------------------------------------------------------------
220 * Utility functions
221 */
222
uvc_find_endpoint(struct usb_host_interface * alts,u8 epaddr)223 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
224 u8 epaddr)
225 {
226 struct usb_host_endpoint *ep;
227 unsigned int i;
228
229 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
230 ep = &alts->endpoint[i];
231 if (ep->desc.bEndpointAddress == epaddr)
232 return ep;
233 }
234
235 return NULL;
236 }
237
uvc_format_by_guid(const u8 guid[16])238 static struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16])
239 {
240 unsigned int len = ARRAY_SIZE(uvc_fmts);
241 unsigned int i;
242
243 for (i = 0; i < len; ++i) {
244 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
245 return &uvc_fmts[i];
246 }
247
248 return NULL;
249 }
250
uvc_colorspace(const u8 primaries)251 static u32 uvc_colorspace(const u8 primaries)
252 {
253 static const u8 colorprimaries[] = {
254 0,
255 V4L2_COLORSPACE_SRGB,
256 V4L2_COLORSPACE_470_SYSTEM_M,
257 V4L2_COLORSPACE_470_SYSTEM_BG,
258 V4L2_COLORSPACE_SMPTE170M,
259 V4L2_COLORSPACE_SMPTE240M,
260 };
261
262 if (primaries < ARRAY_SIZE(colorprimaries))
263 return colorprimaries[primaries];
264
265 return 0;
266 }
267
268 /* Simplify a fraction using a simple continued fraction decomposition. The
269 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
270 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
271 * arbitrary parameters to remove non-significative terms from the simple
272 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
273 * respectively seems to give nice results.
274 */
uvc_simplify_fraction(u32 * numerator,u32 * denominator,unsigned int n_terms,unsigned int threshold)275 void uvc_simplify_fraction(u32 *numerator, u32 *denominator,
276 unsigned int n_terms, unsigned int threshold)
277 {
278 u32 *an;
279 u32 x, y, r;
280 unsigned int i, n;
281
282 an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL);
283 if (an == NULL)
284 return;
285
286 /* Convert the fraction to a simple continued fraction. See
287 * http://mathforum.org/dr.math/faq/faq.fractions.html
288 * Stop if the current term is bigger than or equal to the given
289 * threshold.
290 */
291 x = *numerator;
292 y = *denominator;
293
294 for (n = 0; n < n_terms && y != 0; ++n) {
295 an[n] = x / y;
296 if (an[n] >= threshold) {
297 if (n < 2)
298 n++;
299 break;
300 }
301
302 r = x - an[n] * y;
303 x = y;
304 y = r;
305 }
306
307 /* Expand the simple continued fraction back to an integer fraction. */
308 x = 0;
309 y = 1;
310
311 for (i = n; i > 0; --i) {
312 r = y;
313 y = an[i-1] * y + x;
314 x = r;
315 }
316
317 *numerator = y;
318 *denominator = x;
319 kfree(an);
320 }
321
322 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
323 * to compute numerator / denominator * 10000000 using 32 bit fixed point
324 * arithmetic only.
325 */
uvc_fraction_to_interval(u32 numerator,u32 denominator)326 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator)
327 {
328 u32 multiplier;
329
330 /* Saturate the result if the operation would overflow. */
331 if (denominator == 0 ||
332 numerator/denominator >= ((u32)-1)/10000000)
333 return (u32)-1;
334
335 /* Divide both the denominator and the multiplier by two until
336 * numerator * multiplier doesn't overflow. If anyone knows a better
337 * algorithm please let me know.
338 */
339 multiplier = 10000000;
340 while (numerator > ((u32)-1)/multiplier) {
341 multiplier /= 2;
342 denominator /= 2;
343 }
344
345 return denominator ? numerator * multiplier / denominator : 0;
346 }
347
348 /* ------------------------------------------------------------------------
349 * Terminal and unit management
350 */
351
uvc_entity_by_id(struct uvc_device * dev,int id)352 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
353 {
354 struct uvc_entity *entity;
355
356 list_for_each_entry(entity, &dev->entities, list) {
357 if (entity->id == id)
358 return entity;
359 }
360
361 return NULL;
362 }
363
uvc_entity_by_reference(struct uvc_device * dev,int id,struct uvc_entity * entity)364 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
365 int id, struct uvc_entity *entity)
366 {
367 unsigned int i;
368
369 if (entity == NULL)
370 entity = list_entry(&dev->entities, struct uvc_entity, list);
371
372 list_for_each_entry_continue(entity, &dev->entities, list) {
373 for (i = 0; i < entity->bNrInPins; ++i)
374 if (entity->baSourceID[i] == id)
375 return entity;
376 }
377
378 return NULL;
379 }
380
uvc_stream_by_id(struct uvc_device * dev,int id)381 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
382 {
383 struct uvc_streaming *stream;
384
385 list_for_each_entry(stream, &dev->streams, list) {
386 if (stream->header.bTerminalLink == id)
387 return stream;
388 }
389
390 return NULL;
391 }
392
393 /* ------------------------------------------------------------------------
394 * Descriptors parsing
395 */
396
uvc_parse_format(struct uvc_device * dev,struct uvc_streaming * streaming,struct uvc_format * format,u32 ** intervals,unsigned char * buffer,int buflen)397 static int uvc_parse_format(struct uvc_device *dev,
398 struct uvc_streaming *streaming, struct uvc_format *format,
399 u32 **intervals, unsigned char *buffer, int buflen)
400 {
401 struct usb_interface *intf = streaming->intf;
402 struct usb_host_interface *alts = intf->cur_altsetting;
403 struct uvc_format_desc *fmtdesc;
404 struct uvc_frame *frame;
405 const unsigned char *start = buffer;
406 unsigned int width_multiplier = 1;
407 unsigned int interval;
408 unsigned int i, n;
409 u8 ftype;
410
411 format->type = buffer[2];
412 format->index = buffer[3];
413
414 switch (buffer[2]) {
415 case UVC_VS_FORMAT_UNCOMPRESSED:
416 case UVC_VS_FORMAT_FRAME_BASED:
417 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
418 if (buflen < n) {
419 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
420 "interface %d FORMAT error\n",
421 dev->udev->devnum,
422 alts->desc.bInterfaceNumber);
423 return -EINVAL;
424 }
425
426 /* Find the format descriptor from its GUID. */
427 fmtdesc = uvc_format_by_guid(&buffer[5]);
428
429 if (fmtdesc != NULL) {
430 strlcpy(format->name, fmtdesc->name,
431 sizeof(format->name));
432 format->fcc = fmtdesc->fcc;
433 } else {
434 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
435 &buffer[5]);
436 snprintf(format->name, sizeof(format->name), "%pUl\n",
437 &buffer[5]);
438 format->fcc = 0;
439 }
440
441 format->bpp = buffer[21];
442
443 /* Some devices report a format that doesn't match what they
444 * really send.
445 */
446 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
447 if (format->fcc == V4L2_PIX_FMT_YUYV) {
448 strlcpy(format->name, "Greyscale 8-bit (Y8 )",
449 sizeof(format->name));
450 format->fcc = V4L2_PIX_FMT_GREY;
451 format->bpp = 8;
452 width_multiplier = 2;
453 }
454 }
455
456 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
457 ftype = UVC_VS_FRAME_UNCOMPRESSED;
458 } else {
459 ftype = UVC_VS_FRAME_FRAME_BASED;
460 if (buffer[27])
461 format->flags = UVC_FMT_FLAG_COMPRESSED;
462 }
463 break;
464
465 case UVC_VS_FORMAT_MJPEG:
466 if (buflen < 11) {
467 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
468 "interface %d FORMAT error\n",
469 dev->udev->devnum,
470 alts->desc.bInterfaceNumber);
471 return -EINVAL;
472 }
473
474 strlcpy(format->name, "MJPEG", sizeof(format->name));
475 format->fcc = V4L2_PIX_FMT_MJPEG;
476 format->flags = UVC_FMT_FLAG_COMPRESSED;
477 format->bpp = 0;
478 ftype = UVC_VS_FRAME_MJPEG;
479 break;
480
481 case UVC_VS_FORMAT_DV:
482 if (buflen < 9) {
483 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
484 "interface %d FORMAT error\n",
485 dev->udev->devnum,
486 alts->desc.bInterfaceNumber);
487 return -EINVAL;
488 }
489
490 switch (buffer[8] & 0x7f) {
491 case 0:
492 strlcpy(format->name, "SD-DV", sizeof(format->name));
493 break;
494 case 1:
495 strlcpy(format->name, "SDL-DV", sizeof(format->name));
496 break;
497 case 2:
498 strlcpy(format->name, "HD-DV", sizeof(format->name));
499 break;
500 default:
501 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
502 "interface %d: unknown DV format %u\n",
503 dev->udev->devnum,
504 alts->desc.bInterfaceNumber, buffer[8]);
505 return -EINVAL;
506 }
507
508 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
509 sizeof(format->name));
510
511 format->fcc = V4L2_PIX_FMT_DV;
512 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
513 format->bpp = 0;
514 ftype = 0;
515
516 /* Create a dummy frame descriptor. */
517 frame = &format->frame[0];
518 memset(&format->frame[0], 0, sizeof(format->frame[0]));
519 frame->bFrameIntervalType = 1;
520 frame->dwDefaultFrameInterval = 1;
521 frame->dwFrameInterval = *intervals;
522 *(*intervals)++ = 1;
523 format->nframes = 1;
524 break;
525
526 case UVC_VS_FORMAT_MPEG2TS:
527 case UVC_VS_FORMAT_STREAM_BASED:
528 /* Not supported yet. */
529 default:
530 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
531 "interface %d unsupported format %u\n",
532 dev->udev->devnum, alts->desc.bInterfaceNumber,
533 buffer[2]);
534 return -EINVAL;
535 }
536
537 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
538
539 buflen -= buffer[0];
540 buffer += buffer[0];
541
542 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
543 * based formats have frame descriptors.
544 */
545 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
546 buffer[2] == ftype) {
547 frame = &format->frame[format->nframes];
548 if (ftype != UVC_VS_FRAME_FRAME_BASED)
549 n = buflen > 25 ? buffer[25] : 0;
550 else
551 n = buflen > 21 ? buffer[21] : 0;
552
553 n = n ? n : 3;
554
555 if (buflen < 26 + 4*n) {
556 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
557 "interface %d FRAME error\n", dev->udev->devnum,
558 alts->desc.bInterfaceNumber);
559 return -EINVAL;
560 }
561
562 frame->bFrameIndex = buffer[3];
563 frame->bmCapabilities = buffer[4];
564 frame->wWidth = get_unaligned_le16(&buffer[5])
565 * width_multiplier;
566 frame->wHeight = get_unaligned_le16(&buffer[7]);
567 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
568 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
569 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
570 frame->dwMaxVideoFrameBufferSize =
571 get_unaligned_le32(&buffer[17]);
572 frame->dwDefaultFrameInterval =
573 get_unaligned_le32(&buffer[21]);
574 frame->bFrameIntervalType = buffer[25];
575 } else {
576 frame->dwMaxVideoFrameBufferSize = 0;
577 frame->dwDefaultFrameInterval =
578 get_unaligned_le32(&buffer[17]);
579 frame->bFrameIntervalType = buffer[21];
580 }
581 frame->dwFrameInterval = *intervals;
582
583 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
584 * completely. Observed behaviours range from setting the
585 * value to 1.1x the actual frame size to hardwiring the
586 * 16 low bits to 0. This results in a higher than necessary
587 * memory usage as well as a wrong image size information. For
588 * uncompressed formats this can be fixed by computing the
589 * value from the frame size.
590 */
591 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
592 frame->dwMaxVideoFrameBufferSize = format->bpp
593 * frame->wWidth * frame->wHeight / 8;
594
595 /* Some bogus devices report dwMinFrameInterval equal to
596 * dwMaxFrameInterval and have dwFrameIntervalStep set to
597 * zero. Setting all null intervals to 1 fixes the problem and
598 * some other divisions by zero that could happen.
599 */
600 for (i = 0; i < n; ++i) {
601 interval = get_unaligned_le32(&buffer[26+4*i]);
602 *(*intervals)++ = interval ? interval : 1;
603 }
604
605 /* Make sure that the default frame interval stays between
606 * the boundaries.
607 */
608 n -= frame->bFrameIntervalType ? 1 : 2;
609 frame->dwDefaultFrameInterval =
610 min(frame->dwFrameInterval[n],
611 max(frame->dwFrameInterval[0],
612 frame->dwDefaultFrameInterval));
613
614 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
615 frame->bFrameIntervalType = 1;
616 frame->dwFrameInterval[0] =
617 frame->dwDefaultFrameInterval;
618 }
619
620 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
621 frame->wWidth, frame->wHeight,
622 10000000/frame->dwDefaultFrameInterval,
623 (100000000/frame->dwDefaultFrameInterval)%10);
624
625 format->nframes++;
626 buflen -= buffer[0];
627 buffer += buffer[0];
628 }
629
630 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
631 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
632 buflen -= buffer[0];
633 buffer += buffer[0];
634 }
635
636 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
637 buffer[2] == UVC_VS_COLORFORMAT) {
638 if (buflen < 6) {
639 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
640 "interface %d COLORFORMAT error\n",
641 dev->udev->devnum,
642 alts->desc.bInterfaceNumber);
643 return -EINVAL;
644 }
645
646 format->colorspace = uvc_colorspace(buffer[3]);
647
648 buflen -= buffer[0];
649 buffer += buffer[0];
650 }
651
652 return buffer - start;
653 }
654
uvc_parse_streaming(struct uvc_device * dev,struct usb_interface * intf)655 static int uvc_parse_streaming(struct uvc_device *dev,
656 struct usb_interface *intf)
657 {
658 struct uvc_streaming *streaming = NULL;
659 struct uvc_format *format;
660 struct uvc_frame *frame;
661 struct usb_host_interface *alts = &intf->altsetting[0];
662 unsigned char *_buffer, *buffer = alts->extra;
663 int _buflen, buflen = alts->extralen;
664 unsigned int nformats = 0, nframes = 0, nintervals = 0;
665 unsigned int size, i, n, p;
666 u32 *interval;
667 u16 psize;
668 int ret = -EINVAL;
669
670 if (intf->cur_altsetting->desc.bInterfaceSubClass
671 != UVC_SC_VIDEOSTREAMING) {
672 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
673 "video streaming interface\n", dev->udev->devnum,
674 intf->altsetting[0].desc.bInterfaceNumber);
675 return -EINVAL;
676 }
677
678 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
679 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
680 "claimed\n", dev->udev->devnum,
681 intf->altsetting[0].desc.bInterfaceNumber);
682 return -EINVAL;
683 }
684
685 streaming = kzalloc(sizeof(*streaming), GFP_KERNEL);
686 if (streaming == NULL) {
687 usb_driver_release_interface(&uvc_driver.driver, intf);
688 return -EINVAL;
689 }
690
691 mutex_init(&streaming->mutex);
692 streaming->dev = dev;
693 streaming->intf = usb_get_intf(intf);
694 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
695
696 /* The Pico iMage webcam has its class-specific interface descriptors
697 * after the endpoint descriptors.
698 */
699 if (buflen == 0) {
700 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
701 struct usb_host_endpoint *ep = &alts->endpoint[i];
702
703 if (ep->extralen == 0)
704 continue;
705
706 if (ep->extralen > 2 &&
707 ep->extra[1] == USB_DT_CS_INTERFACE) {
708 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
709 "from endpoint %u.\n", i);
710 buffer = alts->endpoint[i].extra;
711 buflen = alts->endpoint[i].extralen;
712 break;
713 }
714 }
715 }
716
717 /* Skip the standard interface descriptors. */
718 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
719 buflen -= buffer[0];
720 buffer += buffer[0];
721 }
722
723 if (buflen <= 2) {
724 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
725 "interface descriptors found.\n");
726 goto error;
727 }
728
729 /* Parse the header descriptor. */
730 switch (buffer[2]) {
731 case UVC_VS_OUTPUT_HEADER:
732 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
733 size = 9;
734 break;
735
736 case UVC_VS_INPUT_HEADER:
737 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
738 size = 13;
739 break;
740
741 default:
742 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
743 "%d HEADER descriptor not found.\n", dev->udev->devnum,
744 alts->desc.bInterfaceNumber);
745 goto error;
746 }
747
748 p = buflen >= 4 ? buffer[3] : 0;
749 n = buflen >= size ? buffer[size-1] : 0;
750
751 if (buflen < size + p*n) {
752 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
753 "interface %d HEADER descriptor is invalid.\n",
754 dev->udev->devnum, alts->desc.bInterfaceNumber);
755 goto error;
756 }
757
758 streaming->header.bNumFormats = p;
759 streaming->header.bEndpointAddress = buffer[6];
760 if (buffer[2] == UVC_VS_INPUT_HEADER) {
761 streaming->header.bmInfo = buffer[7];
762 streaming->header.bTerminalLink = buffer[8];
763 streaming->header.bStillCaptureMethod = buffer[9];
764 streaming->header.bTriggerSupport = buffer[10];
765 streaming->header.bTriggerUsage = buffer[11];
766 } else {
767 streaming->header.bTerminalLink = buffer[7];
768 }
769 streaming->header.bControlSize = n;
770
771 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
772 GFP_KERNEL);
773 if (streaming->header.bmaControls == NULL) {
774 ret = -ENOMEM;
775 goto error;
776 }
777
778 buflen -= buffer[0];
779 buffer += buffer[0];
780
781 _buffer = buffer;
782 _buflen = buflen;
783
784 /* Count the format and frame descriptors. */
785 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
786 switch (_buffer[2]) {
787 case UVC_VS_FORMAT_UNCOMPRESSED:
788 case UVC_VS_FORMAT_MJPEG:
789 case UVC_VS_FORMAT_FRAME_BASED:
790 nformats++;
791 break;
792
793 case UVC_VS_FORMAT_DV:
794 /* DV format has no frame descriptor. We will create a
795 * dummy frame descriptor with a dummy frame interval.
796 */
797 nformats++;
798 nframes++;
799 nintervals++;
800 break;
801
802 case UVC_VS_FORMAT_MPEG2TS:
803 case UVC_VS_FORMAT_STREAM_BASED:
804 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
805 "interface %d FORMAT %u is not supported.\n",
806 dev->udev->devnum,
807 alts->desc.bInterfaceNumber, _buffer[2]);
808 break;
809
810 case UVC_VS_FRAME_UNCOMPRESSED:
811 case UVC_VS_FRAME_MJPEG:
812 nframes++;
813 if (_buflen > 25)
814 nintervals += _buffer[25] ? _buffer[25] : 3;
815 break;
816
817 case UVC_VS_FRAME_FRAME_BASED:
818 nframes++;
819 if (_buflen > 21)
820 nintervals += _buffer[21] ? _buffer[21] : 3;
821 break;
822 }
823
824 _buflen -= _buffer[0];
825 _buffer += _buffer[0];
826 }
827
828 if (nformats == 0) {
829 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
830 "%d has no supported formats defined.\n",
831 dev->udev->devnum, alts->desc.bInterfaceNumber);
832 goto error;
833 }
834
835 size = nformats * sizeof(*format) + nframes * sizeof(*frame)
836 + nintervals * sizeof(*interval);
837 format = kzalloc(size, GFP_KERNEL);
838 if (format == NULL) {
839 ret = -ENOMEM;
840 goto error;
841 }
842
843 frame = (struct uvc_frame *)&format[nformats];
844 interval = (u32 *)&frame[nframes];
845
846 streaming->format = format;
847 streaming->nformats = nformats;
848
849 /* Parse the format descriptors. */
850 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
851 switch (buffer[2]) {
852 case UVC_VS_FORMAT_UNCOMPRESSED:
853 case UVC_VS_FORMAT_MJPEG:
854 case UVC_VS_FORMAT_DV:
855 case UVC_VS_FORMAT_FRAME_BASED:
856 format->frame = frame;
857 ret = uvc_parse_format(dev, streaming, format,
858 &interval, buffer, buflen);
859 if (ret < 0)
860 goto error;
861
862 frame += format->nframes;
863 format++;
864
865 buflen -= ret;
866 buffer += ret;
867 continue;
868
869 default:
870 break;
871 }
872
873 buflen -= buffer[0];
874 buffer += buffer[0];
875 }
876
877 if (buflen)
878 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
879 "%d has %u bytes of trailing descriptor garbage.\n",
880 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
881
882 /* Parse the alternate settings to find the maximum bandwidth. */
883 for (i = 0; i < intf->num_altsetting; ++i) {
884 struct usb_host_endpoint *ep;
885 alts = &intf->altsetting[i];
886 ep = uvc_find_endpoint(alts,
887 streaming->header.bEndpointAddress);
888 if (ep == NULL)
889 continue;
890
891 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
892 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
893 if (psize > streaming->maxpsize)
894 streaming->maxpsize = psize;
895 }
896
897 list_add_tail(&streaming->list, &dev->streams);
898 return 0;
899
900 error:
901 usb_driver_release_interface(&uvc_driver.driver, intf);
902 usb_put_intf(intf);
903 kfree(streaming->format);
904 kfree(streaming->header.bmaControls);
905 kfree(streaming);
906 return ret;
907 }
908
uvc_alloc_entity(u16 type,u8 id,unsigned int num_pads,unsigned int extra_size)909 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
910 unsigned int num_pads, unsigned int extra_size)
911 {
912 struct uvc_entity *entity;
913 unsigned int num_inputs;
914 unsigned int size;
915 unsigned int i;
916
917 extra_size = ALIGN(extra_size, sizeof(*entity->pads));
918 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
919 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
920 + num_inputs;
921 entity = kzalloc(size, GFP_KERNEL);
922 if (entity == NULL)
923 return NULL;
924
925 entity->id = id;
926 entity->type = type;
927
928 entity->num_links = 0;
929 entity->num_pads = num_pads;
930 entity->pads = ((void *)(entity + 1)) + extra_size;
931
932 for (i = 0; i < num_inputs; ++i)
933 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
934 if (!UVC_ENTITY_IS_OTERM(entity))
935 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
936
937 entity->bNrInPins = num_inputs;
938 entity->baSourceID = (u8 *)(&entity->pads[num_pads]);
939
940 return entity;
941 }
942
943 /* Parse vendor-specific extensions. */
uvc_parse_vendor_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)944 static int uvc_parse_vendor_control(struct uvc_device *dev,
945 const unsigned char *buffer, int buflen)
946 {
947 struct usb_device *udev = dev->udev;
948 struct usb_host_interface *alts = dev->intf->cur_altsetting;
949 struct uvc_entity *unit;
950 unsigned int n, p;
951 int handled = 0;
952
953 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
954 case 0x046d: /* Logitech */
955 if (buffer[1] != 0x41 || buffer[2] != 0x01)
956 break;
957
958 /* Logitech implements several vendor specific functions
959 * through vendor specific extension units (LXU).
960 *
961 * The LXU descriptors are similar to XU descriptors
962 * (see "USB Device Video Class for Video Devices", section
963 * 3.7.2.6 "Extension Unit Descriptor") with the following
964 * differences:
965 *
966 * ----------------------------------------------------------
967 * 0 bLength 1 Number
968 * Size of this descriptor, in bytes: 24+p+n*2
969 * ----------------------------------------------------------
970 * 23+p+n bmControlsType N Bitmap
971 * Individual bits in the set are defined:
972 * 0: Absolute
973 * 1: Relative
974 *
975 * This bitset is mapped exactly the same as bmControls.
976 * ----------------------------------------------------------
977 * 23+p+n*2 bReserved 1 Boolean
978 * ----------------------------------------------------------
979 * 24+p+n*2 iExtension 1 Index
980 * Index of a string descriptor that describes this
981 * extension unit.
982 * ----------------------------------------------------------
983 */
984 p = buflen >= 22 ? buffer[21] : 0;
985 n = buflen >= 25 + p ? buffer[22+p] : 0;
986
987 if (buflen < 25 + p + 2*n) {
988 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
989 "interface %d EXTENSION_UNIT error\n",
990 udev->devnum, alts->desc.bInterfaceNumber);
991 break;
992 }
993
994 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
995 p + 1, 2*n);
996 if (unit == NULL)
997 return -ENOMEM;
998
999 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1000 unit->extension.bNumControls = buffer[20];
1001 memcpy(unit->baSourceID, &buffer[22], p);
1002 unit->extension.bControlSize = buffer[22+p];
1003 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1004 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit)
1005 + n;
1006 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
1007
1008 if (buffer[24+p+2*n] != 0)
1009 usb_string(udev, buffer[24+p+2*n], unit->name,
1010 sizeof(unit->name));
1011 else
1012 sprintf(unit->name, "Extension %u", buffer[3]);
1013
1014 list_add_tail(&unit->list, &dev->entities);
1015 handled = 1;
1016 break;
1017 }
1018
1019 return handled;
1020 }
1021
uvc_parse_standard_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)1022 static int uvc_parse_standard_control(struct uvc_device *dev,
1023 const unsigned char *buffer, int buflen)
1024 {
1025 struct usb_device *udev = dev->udev;
1026 struct uvc_entity *unit, *term;
1027 struct usb_interface *intf;
1028 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1029 unsigned int i, n, p, len;
1030 u16 type;
1031
1032 switch (buffer[2]) {
1033 case UVC_VC_HEADER:
1034 n = buflen >= 12 ? buffer[11] : 0;
1035
1036 if (buflen < 12 + n) {
1037 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1038 "interface %d HEADER error\n", udev->devnum,
1039 alts->desc.bInterfaceNumber);
1040 return -EINVAL;
1041 }
1042
1043 dev->uvc_version = get_unaligned_le16(&buffer[3]);
1044 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
1045
1046 /* Parse all USB Video Streaming interfaces. */
1047 for (i = 0; i < n; ++i) {
1048 intf = usb_ifnum_to_if(udev, buffer[12+i]);
1049 if (intf == NULL) {
1050 uvc_trace(UVC_TRACE_DESCR, "device %d "
1051 "interface %d doesn't exists\n",
1052 udev->devnum, i);
1053 continue;
1054 }
1055
1056 uvc_parse_streaming(dev, intf);
1057 }
1058 break;
1059
1060 case UVC_VC_INPUT_TERMINAL:
1061 if (buflen < 8) {
1062 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1063 "interface %d INPUT_TERMINAL error\n",
1064 udev->devnum, alts->desc.bInterfaceNumber);
1065 return -EINVAL;
1066 }
1067
1068 /* Make sure the terminal type MSB is not null, otherwise it
1069 * could be confused with a unit.
1070 */
1071 type = get_unaligned_le16(&buffer[4]);
1072 if ((type & 0xff00) == 0) {
1073 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1074 "interface %d INPUT_TERMINAL %d has invalid "
1075 "type 0x%04x, skipping\n", udev->devnum,
1076 alts->desc.bInterfaceNumber,
1077 buffer[3], type);
1078 return 0;
1079 }
1080
1081 n = 0;
1082 p = 0;
1083 len = 8;
1084
1085 if (type == UVC_ITT_CAMERA) {
1086 n = buflen >= 15 ? buffer[14] : 0;
1087 len = 15;
1088
1089 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1090 n = buflen >= 9 ? buffer[8] : 0;
1091 p = buflen >= 10 + n ? buffer[9+n] : 0;
1092 len = 10;
1093 }
1094
1095 if (buflen < len + n + p) {
1096 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1097 "interface %d INPUT_TERMINAL error\n",
1098 udev->devnum, alts->desc.bInterfaceNumber);
1099 return -EINVAL;
1100 }
1101
1102 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1103 1, n + p);
1104 if (term == NULL)
1105 return -ENOMEM;
1106
1107 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1108 term->camera.bControlSize = n;
1109 term->camera.bmControls = (u8 *)term + sizeof(*term);
1110 term->camera.wObjectiveFocalLengthMin =
1111 get_unaligned_le16(&buffer[8]);
1112 term->camera.wObjectiveFocalLengthMax =
1113 get_unaligned_le16(&buffer[10]);
1114 term->camera.wOcularFocalLength =
1115 get_unaligned_le16(&buffer[12]);
1116 memcpy(term->camera.bmControls, &buffer[15], n);
1117 } else if (UVC_ENTITY_TYPE(term) ==
1118 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1119 term->media.bControlSize = n;
1120 term->media.bmControls = (u8 *)term + sizeof(*term);
1121 term->media.bTransportModeSize = p;
1122 term->media.bmTransportModes = (u8 *)term
1123 + sizeof(*term) + n;
1124 memcpy(term->media.bmControls, &buffer[9], n);
1125 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1126 }
1127
1128 if (buffer[7] != 0)
1129 usb_string(udev, buffer[7], term->name,
1130 sizeof(term->name));
1131 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1132 sprintf(term->name, "Camera %u", buffer[3]);
1133 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1134 sprintf(term->name, "Media %u", buffer[3]);
1135 else
1136 sprintf(term->name, "Input %u", buffer[3]);
1137
1138 list_add_tail(&term->list, &dev->entities);
1139 break;
1140
1141 case UVC_VC_OUTPUT_TERMINAL:
1142 if (buflen < 9) {
1143 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1144 "interface %d OUTPUT_TERMINAL error\n",
1145 udev->devnum, alts->desc.bInterfaceNumber);
1146 return -EINVAL;
1147 }
1148
1149 /* Make sure the terminal type MSB is not null, otherwise it
1150 * could be confused with a unit.
1151 */
1152 type = get_unaligned_le16(&buffer[4]);
1153 if ((type & 0xff00) == 0) {
1154 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1155 "interface %d OUTPUT_TERMINAL %d has invalid "
1156 "type 0x%04x, skipping\n", udev->devnum,
1157 alts->desc.bInterfaceNumber, buffer[3], type);
1158 return 0;
1159 }
1160
1161 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1162 1, 0);
1163 if (term == NULL)
1164 return -ENOMEM;
1165
1166 memcpy(term->baSourceID, &buffer[7], 1);
1167
1168 if (buffer[8] != 0)
1169 usb_string(udev, buffer[8], term->name,
1170 sizeof(term->name));
1171 else
1172 sprintf(term->name, "Output %u", buffer[3]);
1173
1174 list_add_tail(&term->list, &dev->entities);
1175 break;
1176
1177 case UVC_VC_SELECTOR_UNIT:
1178 p = buflen >= 5 ? buffer[4] : 0;
1179
1180 if (buflen < 5 || buflen < 6 + p) {
1181 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1182 "interface %d SELECTOR_UNIT error\n",
1183 udev->devnum, alts->desc.bInterfaceNumber);
1184 return -EINVAL;
1185 }
1186
1187 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1188 if (unit == NULL)
1189 return -ENOMEM;
1190
1191 memcpy(unit->baSourceID, &buffer[5], p);
1192
1193 if (buffer[5+p] != 0)
1194 usb_string(udev, buffer[5+p], unit->name,
1195 sizeof(unit->name));
1196 else
1197 sprintf(unit->name, "Selector %u", buffer[3]);
1198
1199 list_add_tail(&unit->list, &dev->entities);
1200 break;
1201
1202 case UVC_VC_PROCESSING_UNIT:
1203 n = buflen >= 8 ? buffer[7] : 0;
1204 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1205
1206 if (buflen < p + n) {
1207 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1208 "interface %d PROCESSING_UNIT error\n",
1209 udev->devnum, alts->desc.bInterfaceNumber);
1210 return -EINVAL;
1211 }
1212
1213 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1214 if (unit == NULL)
1215 return -ENOMEM;
1216
1217 memcpy(unit->baSourceID, &buffer[4], 1);
1218 unit->processing.wMaxMultiplier =
1219 get_unaligned_le16(&buffer[5]);
1220 unit->processing.bControlSize = buffer[7];
1221 unit->processing.bmControls = (u8 *)unit + sizeof(*unit);
1222 memcpy(unit->processing.bmControls, &buffer[8], n);
1223 if (dev->uvc_version >= 0x0110)
1224 unit->processing.bmVideoStandards = buffer[9+n];
1225
1226 if (buffer[8+n] != 0)
1227 usb_string(udev, buffer[8+n], unit->name,
1228 sizeof(unit->name));
1229 else
1230 sprintf(unit->name, "Processing %u", buffer[3]);
1231
1232 list_add_tail(&unit->list, &dev->entities);
1233 break;
1234
1235 case UVC_VC_EXTENSION_UNIT:
1236 p = buflen >= 22 ? buffer[21] : 0;
1237 n = buflen >= 24 + p ? buffer[22+p] : 0;
1238
1239 if (buflen < 24 + p + n) {
1240 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1241 "interface %d EXTENSION_UNIT error\n",
1242 udev->devnum, alts->desc.bInterfaceNumber);
1243 return -EINVAL;
1244 }
1245
1246 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1247 if (unit == NULL)
1248 return -ENOMEM;
1249
1250 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1251 unit->extension.bNumControls = buffer[20];
1252 memcpy(unit->baSourceID, &buffer[22], p);
1253 unit->extension.bControlSize = buffer[22+p];
1254 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1255 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1256
1257 if (buffer[23+p+n] != 0)
1258 usb_string(udev, buffer[23+p+n], unit->name,
1259 sizeof(unit->name));
1260 else
1261 sprintf(unit->name, "Extension %u", buffer[3]);
1262
1263 list_add_tail(&unit->list, &dev->entities);
1264 break;
1265
1266 default:
1267 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1268 "descriptor (%u)\n", buffer[2]);
1269 break;
1270 }
1271
1272 return 0;
1273 }
1274
uvc_parse_control(struct uvc_device * dev)1275 static int uvc_parse_control(struct uvc_device *dev)
1276 {
1277 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1278 unsigned char *buffer = alts->extra;
1279 int buflen = alts->extralen;
1280 int ret;
1281
1282 /* Parse the default alternate setting only, as the UVC specification
1283 * defines a single alternate setting, the default alternate setting
1284 * zero.
1285 */
1286
1287 while (buflen > 2) {
1288 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1289 buffer[1] != USB_DT_CS_INTERFACE)
1290 goto next_descriptor;
1291
1292 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1293 return ret;
1294
1295 next_descriptor:
1296 buflen -= buffer[0];
1297 buffer += buffer[0];
1298 }
1299
1300 /* Check if the optional status endpoint is present. Built-in iSight
1301 * webcams have an interrupt endpoint but spit proprietary data that
1302 * don't conform to the UVC status endpoint messages. Don't try to
1303 * handle the interrupt endpoint for those cameras.
1304 */
1305 if (alts->desc.bNumEndpoints == 1 &&
1306 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1307 struct usb_host_endpoint *ep = &alts->endpoint[0];
1308 struct usb_endpoint_descriptor *desc = &ep->desc;
1309
1310 if (usb_endpoint_is_int_in(desc) &&
1311 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1312 desc->bInterval != 0) {
1313 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1314 "(addr %02x).\n", desc->bEndpointAddress);
1315 dev->int_ep = ep;
1316 }
1317 }
1318
1319 return 0;
1320 }
1321
1322 /* ------------------------------------------------------------------------
1323 * UVC device scan
1324 */
1325
1326 /*
1327 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1328 * and containing the following units:
1329 *
1330 * - one or more Output Terminals (USB Streaming or Display)
1331 * - zero or one Processing Unit
1332 * - zero, one or more single-input Selector Units
1333 * - zero or one multiple-input Selector Units, provided all inputs are
1334 * connected to input terminals
1335 * - zero, one or mode single-input Extension Units
1336 * - one or more Input Terminals (Camera, External or USB Streaming)
1337 *
1338 * The terminal and units must match on of the following structures:
1339 *
1340 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1341 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1342 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1343 *
1344 * +---------+ +---------+ -> OTT_*(0)
1345 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1346 * +---------+ +---------+ -> OTT_*(n)
1347 *
1348 * The Processing Unit and Extension Units can be in any order. Additional
1349 * Extension Units connected to the main chain as single-unit branches are
1350 * also supported. Single-input Selector Units are ignored.
1351 */
uvc_scan_chain_entity(struct uvc_video_chain * chain,struct uvc_entity * entity)1352 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1353 struct uvc_entity *entity)
1354 {
1355 switch (UVC_ENTITY_TYPE(entity)) {
1356 case UVC_VC_EXTENSION_UNIT:
1357 if (uvc_trace_param & UVC_TRACE_PROBE)
1358 printk(KERN_CONT " <- XU %d", entity->id);
1359
1360 if (entity->bNrInPins != 1) {
1361 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1362 "than 1 input pin.\n", entity->id);
1363 return -1;
1364 }
1365
1366 break;
1367
1368 case UVC_VC_PROCESSING_UNIT:
1369 if (uvc_trace_param & UVC_TRACE_PROBE)
1370 printk(KERN_CONT " <- PU %d", entity->id);
1371
1372 if (chain->processing != NULL) {
1373 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1374 "Processing Units in chain.\n");
1375 return -1;
1376 }
1377
1378 chain->processing = entity;
1379 break;
1380
1381 case UVC_VC_SELECTOR_UNIT:
1382 if (uvc_trace_param & UVC_TRACE_PROBE)
1383 printk(KERN_CONT " <- SU %d", entity->id);
1384
1385 /* Single-input selector units are ignored. */
1386 if (entity->bNrInPins == 1)
1387 break;
1388
1389 if (chain->selector != NULL) {
1390 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1391 "Units in chain.\n");
1392 return -1;
1393 }
1394
1395 chain->selector = entity;
1396 break;
1397
1398 case UVC_ITT_VENDOR_SPECIFIC:
1399 case UVC_ITT_CAMERA:
1400 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1401 if (uvc_trace_param & UVC_TRACE_PROBE)
1402 printk(KERN_CONT " <- IT %d\n", entity->id);
1403
1404 break;
1405
1406 case UVC_OTT_VENDOR_SPECIFIC:
1407 case UVC_OTT_DISPLAY:
1408 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1409 if (uvc_trace_param & UVC_TRACE_PROBE)
1410 printk(KERN_CONT " OT %d", entity->id);
1411
1412 break;
1413
1414 case UVC_TT_STREAMING:
1415 if (UVC_ENTITY_IS_ITERM(entity)) {
1416 if (uvc_trace_param & UVC_TRACE_PROBE)
1417 printk(KERN_CONT " <- IT %d\n", entity->id);
1418 } else {
1419 if (uvc_trace_param & UVC_TRACE_PROBE)
1420 printk(KERN_CONT " OT %d", entity->id);
1421 }
1422
1423 break;
1424
1425 default:
1426 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1427 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1428 return -1;
1429 }
1430
1431 list_add_tail(&entity->chain, &chain->entities);
1432 return 0;
1433 }
1434
uvc_scan_chain_forward(struct uvc_video_chain * chain,struct uvc_entity * entity,struct uvc_entity * prev)1435 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1436 struct uvc_entity *entity, struct uvc_entity *prev)
1437 {
1438 struct uvc_entity *forward;
1439 int found;
1440
1441 /* Forward scan */
1442 forward = NULL;
1443 found = 0;
1444
1445 while (1) {
1446 forward = uvc_entity_by_reference(chain->dev, entity->id,
1447 forward);
1448 if (forward == NULL)
1449 break;
1450 if (forward == prev)
1451 continue;
1452
1453 switch (UVC_ENTITY_TYPE(forward)) {
1454 case UVC_VC_EXTENSION_UNIT:
1455 if (forward->bNrInPins != 1) {
1456 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1457 "has more than 1 input pin.\n",
1458 entity->id);
1459 return -EINVAL;
1460 }
1461
1462 list_add_tail(&forward->chain, &chain->entities);
1463 if (uvc_trace_param & UVC_TRACE_PROBE) {
1464 if (!found)
1465 printk(KERN_CONT " (->");
1466
1467 printk(KERN_CONT " XU %d", forward->id);
1468 found = 1;
1469 }
1470 break;
1471
1472 case UVC_OTT_VENDOR_SPECIFIC:
1473 case UVC_OTT_DISPLAY:
1474 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1475 case UVC_TT_STREAMING:
1476 if (UVC_ENTITY_IS_ITERM(forward)) {
1477 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1478 "terminal %u.\n", forward->id);
1479 return -EINVAL;
1480 }
1481
1482 list_add_tail(&forward->chain, &chain->entities);
1483 if (uvc_trace_param & UVC_TRACE_PROBE) {
1484 if (!found)
1485 printk(KERN_CONT " (->");
1486
1487 printk(KERN_CONT " OT %d", forward->id);
1488 found = 1;
1489 }
1490 break;
1491 }
1492 }
1493 if (found)
1494 printk(KERN_CONT ")");
1495
1496 return 0;
1497 }
1498
uvc_scan_chain_backward(struct uvc_video_chain * chain,struct uvc_entity ** _entity)1499 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1500 struct uvc_entity **_entity)
1501 {
1502 struct uvc_entity *entity = *_entity;
1503 struct uvc_entity *term;
1504 int id = -EINVAL, i;
1505
1506 switch (UVC_ENTITY_TYPE(entity)) {
1507 case UVC_VC_EXTENSION_UNIT:
1508 case UVC_VC_PROCESSING_UNIT:
1509 id = entity->baSourceID[0];
1510 break;
1511
1512 case UVC_VC_SELECTOR_UNIT:
1513 /* Single-input selector units are ignored. */
1514 if (entity->bNrInPins == 1) {
1515 id = entity->baSourceID[0];
1516 break;
1517 }
1518
1519 if (uvc_trace_param & UVC_TRACE_PROBE)
1520 printk(KERN_CONT " <- IT");
1521
1522 chain->selector = entity;
1523 for (i = 0; i < entity->bNrInPins; ++i) {
1524 id = entity->baSourceID[i];
1525 term = uvc_entity_by_id(chain->dev, id);
1526 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1527 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1528 "input %d isn't connected to an "
1529 "input terminal\n", entity->id, i);
1530 return -1;
1531 }
1532
1533 if (uvc_trace_param & UVC_TRACE_PROBE)
1534 printk(KERN_CONT " %d", term->id);
1535
1536 list_add_tail(&term->chain, &chain->entities);
1537 uvc_scan_chain_forward(chain, term, entity);
1538 }
1539
1540 if (uvc_trace_param & UVC_TRACE_PROBE)
1541 printk(KERN_CONT "\n");
1542
1543 id = 0;
1544 break;
1545
1546 case UVC_ITT_VENDOR_SPECIFIC:
1547 case UVC_ITT_CAMERA:
1548 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1549 case UVC_OTT_VENDOR_SPECIFIC:
1550 case UVC_OTT_DISPLAY:
1551 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1552 case UVC_TT_STREAMING:
1553 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1554 break;
1555 }
1556
1557 if (id <= 0) {
1558 *_entity = NULL;
1559 return id;
1560 }
1561
1562 entity = uvc_entity_by_id(chain->dev, id);
1563 if (entity == NULL) {
1564 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1565 "unknown entity %d.\n", id);
1566 return -EINVAL;
1567 }
1568
1569 *_entity = entity;
1570 return 0;
1571 }
1572
uvc_scan_chain(struct uvc_video_chain * chain,struct uvc_entity * term)1573 static int uvc_scan_chain(struct uvc_video_chain *chain,
1574 struct uvc_entity *term)
1575 {
1576 struct uvc_entity *entity, *prev;
1577
1578 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1579
1580 entity = term;
1581 prev = NULL;
1582
1583 while (entity != NULL) {
1584 /* Entity must not be part of an existing chain */
1585 if (entity->chain.next || entity->chain.prev) {
1586 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1587 "entity %d already in chain.\n", entity->id);
1588 return -EINVAL;
1589 }
1590
1591 /* Process entity */
1592 if (uvc_scan_chain_entity(chain, entity) < 0)
1593 return -EINVAL;
1594
1595 /* Forward scan */
1596 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1597 return -EINVAL;
1598
1599 /* Backward scan */
1600 prev = entity;
1601 if (uvc_scan_chain_backward(chain, &entity) < 0)
1602 return -EINVAL;
1603 }
1604
1605 return 0;
1606 }
1607
uvc_print_terms(struct list_head * terms,u16 dir,char * buffer)1608 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1609 char *buffer)
1610 {
1611 struct uvc_entity *term;
1612 unsigned int nterms = 0;
1613 char *p = buffer;
1614
1615 list_for_each_entry(term, terms, chain) {
1616 if (!UVC_ENTITY_IS_TERM(term) ||
1617 UVC_TERM_DIRECTION(term) != dir)
1618 continue;
1619
1620 if (nterms)
1621 p += sprintf(p, ",");
1622 if (++nterms >= 4) {
1623 p += sprintf(p, "...");
1624 break;
1625 }
1626 p += sprintf(p, "%u", term->id);
1627 }
1628
1629 return p - buffer;
1630 }
1631
uvc_print_chain(struct uvc_video_chain * chain)1632 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1633 {
1634 static char buffer[43];
1635 char *p = buffer;
1636
1637 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1638 p += sprintf(p, " -> ");
1639 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1640
1641 return buffer;
1642 }
1643
uvc_alloc_chain(struct uvc_device * dev)1644 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1645 {
1646 struct uvc_video_chain *chain;
1647
1648 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1649 if (chain == NULL)
1650 return NULL;
1651
1652 INIT_LIST_HEAD(&chain->entities);
1653 mutex_init(&chain->ctrl_mutex);
1654 chain->dev = dev;
1655 v4l2_prio_init(&chain->prio);
1656
1657 return chain;
1658 }
1659
1660 /*
1661 * Fallback heuristic for devices that don't connect units and terminals in a
1662 * valid chain.
1663 *
1664 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1665 * to fail, but if we just take the entities we can find and put them together
1666 * in the most sensible chain we can think of, turns out they do work anyway.
1667 * Note: This heuristic assumes there is a single chain.
1668 *
1669 * At the time of writing, devices known to have such a broken chain are
1670 * - Acer Integrated Camera (5986:055a)
1671 * - Realtek rtl157a7 (0bda:57a7)
1672 */
uvc_scan_fallback(struct uvc_device * dev)1673 static int uvc_scan_fallback(struct uvc_device *dev)
1674 {
1675 struct uvc_video_chain *chain;
1676 struct uvc_entity *iterm = NULL;
1677 struct uvc_entity *oterm = NULL;
1678 struct uvc_entity *entity;
1679 struct uvc_entity *prev;
1680
1681 /*
1682 * Start by locating the input and output terminals. We only support
1683 * devices with exactly one of each for now.
1684 */
1685 list_for_each_entry(entity, &dev->entities, list) {
1686 if (UVC_ENTITY_IS_ITERM(entity)) {
1687 if (iterm)
1688 return -EINVAL;
1689 iterm = entity;
1690 }
1691
1692 if (UVC_ENTITY_IS_OTERM(entity)) {
1693 if (oterm)
1694 return -EINVAL;
1695 oterm = entity;
1696 }
1697 }
1698
1699 if (iterm == NULL || oterm == NULL)
1700 return -EINVAL;
1701
1702 /* Allocate the chain and fill it. */
1703 chain = uvc_alloc_chain(dev);
1704 if (chain == NULL)
1705 return -ENOMEM;
1706
1707 if (uvc_scan_chain_entity(chain, oterm) < 0)
1708 goto error;
1709
1710 prev = oterm;
1711
1712 /*
1713 * Add all Processing and Extension Units with two pads. The order
1714 * doesn't matter much, use reverse list traversal to connect units in
1715 * UVC descriptor order as we build the chain from output to input. This
1716 * leads to units appearing in the order meant by the manufacturer for
1717 * the cameras known to require this heuristic.
1718 */
1719 list_for_each_entry_reverse(entity, &dev->entities, list) {
1720 if (entity->type != UVC_VC_PROCESSING_UNIT &&
1721 entity->type != UVC_VC_EXTENSION_UNIT)
1722 continue;
1723
1724 if (entity->num_pads != 2)
1725 continue;
1726
1727 if (uvc_scan_chain_entity(chain, entity) < 0)
1728 goto error;
1729
1730 prev->baSourceID[0] = entity->id;
1731 prev = entity;
1732 }
1733
1734 if (uvc_scan_chain_entity(chain, iterm) < 0)
1735 goto error;
1736
1737 prev->baSourceID[0] = iterm->id;
1738
1739 list_add_tail(&chain->list, &dev->chains);
1740
1741 uvc_trace(UVC_TRACE_PROBE,
1742 "Found a video chain by fallback heuristic (%s).\n",
1743 uvc_print_chain(chain));
1744
1745 return 0;
1746
1747 error:
1748 kfree(chain);
1749 return -EINVAL;
1750 }
1751
1752 /*
1753 * Scan the device for video chains and register video devices.
1754 *
1755 * Chains are scanned starting at their output terminals and walked backwards.
1756 */
uvc_scan_device(struct uvc_device * dev)1757 static int uvc_scan_device(struct uvc_device *dev)
1758 {
1759 struct uvc_video_chain *chain;
1760 struct uvc_entity *term;
1761
1762 list_for_each_entry(term, &dev->entities, list) {
1763 if (!UVC_ENTITY_IS_OTERM(term))
1764 continue;
1765
1766 /* If the terminal is already included in a chain, skip it.
1767 * This can happen for chains that have multiple output
1768 * terminals, where all output terminals beside the first one
1769 * will be inserted in the chain in forward scans.
1770 */
1771 if (term->chain.next || term->chain.prev)
1772 continue;
1773
1774 chain = uvc_alloc_chain(dev);
1775 if (chain == NULL)
1776 return -ENOMEM;
1777
1778 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1779
1780 if (uvc_scan_chain(chain, term) < 0) {
1781 kfree(chain);
1782 continue;
1783 }
1784
1785 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1786 uvc_print_chain(chain));
1787
1788 list_add_tail(&chain->list, &dev->chains);
1789 }
1790
1791 if (list_empty(&dev->chains))
1792 uvc_scan_fallback(dev);
1793
1794 if (list_empty(&dev->chains)) {
1795 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1796 return -1;
1797 }
1798
1799 return 0;
1800 }
1801
1802 /* ------------------------------------------------------------------------
1803 * Video device registration and unregistration
1804 */
1805
1806 /*
1807 * Delete the UVC device.
1808 *
1809 * Called by the kernel when the last reference to the uvc_device structure
1810 * is released.
1811 *
1812 * As this function is called after or during disconnect(), all URBs have
1813 * already been canceled by the USB core. There is no need to kill the
1814 * interrupt URB manually.
1815 */
uvc_delete(struct kref * kref)1816 static void uvc_delete(struct kref *kref)
1817 {
1818 struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
1819 struct list_head *p, *n;
1820
1821 uvc_status_cleanup(dev);
1822 uvc_ctrl_cleanup_device(dev);
1823
1824 usb_put_intf(dev->intf);
1825 usb_put_dev(dev->udev);
1826
1827 if (dev->vdev.dev)
1828 v4l2_device_unregister(&dev->vdev);
1829 #ifdef CONFIG_MEDIA_CONTROLLER
1830 if (media_devnode_is_registered(dev->mdev.devnode))
1831 media_device_unregister(&dev->mdev);
1832 media_device_cleanup(&dev->mdev);
1833 #endif
1834
1835 list_for_each_safe(p, n, &dev->chains) {
1836 struct uvc_video_chain *chain;
1837 chain = list_entry(p, struct uvc_video_chain, list);
1838 kfree(chain);
1839 }
1840
1841 list_for_each_safe(p, n, &dev->entities) {
1842 struct uvc_entity *entity;
1843 entity = list_entry(p, struct uvc_entity, list);
1844 #ifdef CONFIG_MEDIA_CONTROLLER
1845 uvc_mc_cleanup_entity(entity);
1846 #endif
1847 kfree(entity);
1848 }
1849
1850 list_for_each_safe(p, n, &dev->streams) {
1851 struct uvc_streaming *streaming;
1852 streaming = list_entry(p, struct uvc_streaming, list);
1853 usb_driver_release_interface(&uvc_driver.driver,
1854 streaming->intf);
1855 usb_put_intf(streaming->intf);
1856 kfree(streaming->format);
1857 kfree(streaming->header.bmaControls);
1858 kfree(streaming);
1859 }
1860
1861 kfree(dev);
1862 }
1863
uvc_release(struct video_device * vdev)1864 static void uvc_release(struct video_device *vdev)
1865 {
1866 struct uvc_streaming *stream = video_get_drvdata(vdev);
1867 struct uvc_device *dev = stream->dev;
1868
1869 kref_put(&dev->ref, uvc_delete);
1870 }
1871
1872 /*
1873 * Unregister the video devices.
1874 */
uvc_unregister_video(struct uvc_device * dev)1875 static void uvc_unregister_video(struct uvc_device *dev)
1876 {
1877 struct uvc_streaming *stream;
1878
1879 list_for_each_entry(stream, &dev->streams, list) {
1880 if (!video_is_registered(&stream->vdev))
1881 continue;
1882
1883 video_unregister_device(&stream->vdev);
1884 video_unregister_device(&stream->meta.vdev);
1885
1886 uvc_debugfs_cleanup_stream(stream);
1887 }
1888 }
1889
uvc_register_video_device(struct uvc_device * dev,struct uvc_streaming * stream,struct video_device * vdev,struct uvc_video_queue * queue,enum v4l2_buf_type type,const struct v4l2_file_operations * fops,const struct v4l2_ioctl_ops * ioctl_ops)1890 int uvc_register_video_device(struct uvc_device *dev,
1891 struct uvc_streaming *stream,
1892 struct video_device *vdev,
1893 struct uvc_video_queue *queue,
1894 enum v4l2_buf_type type,
1895 const struct v4l2_file_operations *fops,
1896 const struct v4l2_ioctl_ops *ioctl_ops)
1897 {
1898 int ret;
1899
1900 /* Initialize the video buffers queue. */
1901 ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
1902 if (ret)
1903 return ret;
1904
1905 /* Register the device with V4L. */
1906
1907 /*
1908 * We already hold a reference to dev->udev. The video device will be
1909 * unregistered before the reference is released, so we don't need to
1910 * get another one.
1911 */
1912 vdev->v4l2_dev = &dev->vdev;
1913 vdev->fops = fops;
1914 vdev->ioctl_ops = ioctl_ops;
1915 vdev->release = uvc_release;
1916 vdev->prio = &stream->chain->prio;
1917 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1918 vdev->vfl_dir = VFL_DIR_TX;
1919 else
1920 vdev->vfl_dir = VFL_DIR_RX;
1921
1922 switch (type) {
1923 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1924 default:
1925 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1926 break;
1927 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1928 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
1929 break;
1930 case V4L2_BUF_TYPE_META_CAPTURE:
1931 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
1932 break;
1933 }
1934
1935 strlcpy(vdev->name, dev->name, sizeof(vdev->name));
1936
1937 /*
1938 * Set the driver data before calling video_register_device, otherwise
1939 * the file open() handler might race us.
1940 */
1941 video_set_drvdata(vdev, stream);
1942
1943 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1944 if (ret < 0) {
1945 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
1946 v4l2_type_names[type], ret);
1947 return ret;
1948 }
1949
1950 kref_get(&dev->ref);
1951 return 0;
1952 }
1953
uvc_register_video(struct uvc_device * dev,struct uvc_streaming * stream)1954 static int uvc_register_video(struct uvc_device *dev,
1955 struct uvc_streaming *stream)
1956 {
1957 int ret;
1958
1959 /* Initialize the streaming interface with default parameters. */
1960 ret = uvc_video_init(stream);
1961 if (ret < 0) {
1962 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
1963 ret);
1964 return ret;
1965 }
1966
1967 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1968 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
1969 | V4L2_CAP_META_CAPTURE;
1970 else
1971 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1972
1973 uvc_debugfs_init_stream(stream);
1974
1975 /* Register the device with V4L. */
1976 return uvc_register_video_device(dev, stream, &stream->vdev,
1977 &stream->queue, stream->type,
1978 &uvc_fops, &uvc_ioctl_ops);
1979 }
1980
1981 /*
1982 * Register all video devices in all chains.
1983 */
uvc_register_terms(struct uvc_device * dev,struct uvc_video_chain * chain)1984 static int uvc_register_terms(struct uvc_device *dev,
1985 struct uvc_video_chain *chain)
1986 {
1987 struct uvc_streaming *stream;
1988 struct uvc_entity *term;
1989 int ret;
1990
1991 list_for_each_entry(term, &chain->entities, chain) {
1992 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1993 continue;
1994
1995 stream = uvc_stream_by_id(dev, term->id);
1996 if (stream == NULL) {
1997 uvc_printk(KERN_INFO, "No streaming interface found "
1998 "for terminal %u.", term->id);
1999 continue;
2000 }
2001
2002 stream->chain = chain;
2003 ret = uvc_register_video(dev, stream);
2004 if (ret < 0)
2005 return ret;
2006
2007 /* Register a metadata node, but ignore a possible failure,
2008 * complete registration of video nodes anyway.
2009 */
2010 uvc_meta_register(stream);
2011
2012 term->vdev = &stream->vdev;
2013 }
2014
2015 return 0;
2016 }
2017
uvc_register_chains(struct uvc_device * dev)2018 static int uvc_register_chains(struct uvc_device *dev)
2019 {
2020 struct uvc_video_chain *chain;
2021 int ret;
2022
2023 list_for_each_entry(chain, &dev->chains, list) {
2024 ret = uvc_register_terms(dev, chain);
2025 if (ret < 0)
2026 return ret;
2027
2028 #ifdef CONFIG_MEDIA_CONTROLLER
2029 ret = uvc_mc_register_entities(chain);
2030 if (ret < 0) {
2031 uvc_printk(KERN_INFO, "Failed to register entites "
2032 "(%d).\n", ret);
2033 }
2034 #endif
2035 }
2036
2037 return 0;
2038 }
2039
2040 /* ------------------------------------------------------------------------
2041 * USB probe, disconnect, suspend and resume
2042 */
2043
2044 struct uvc_device_info {
2045 u32 quirks;
2046 u32 meta_format;
2047 };
2048
uvc_probe(struct usb_interface * intf,const struct usb_device_id * id)2049 static int uvc_probe(struct usb_interface *intf,
2050 const struct usb_device_id *id)
2051 {
2052 struct usb_device *udev = interface_to_usbdev(intf);
2053 struct uvc_device *dev;
2054 const struct uvc_device_info *info =
2055 (const struct uvc_device_info *)id->driver_info;
2056 u32 quirks = info ? info->quirks : 0;
2057 int function;
2058 int ret;
2059
2060 if (id->idVendor && id->idProduct)
2061 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
2062 "(%04x:%04x)\n", udev->devpath, id->idVendor,
2063 id->idProduct);
2064 else
2065 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
2066 udev->devpath);
2067
2068 /* Allocate memory for the device and initialize it. */
2069 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2070 if (dev == NULL)
2071 return -ENOMEM;
2072
2073 INIT_LIST_HEAD(&dev->entities);
2074 INIT_LIST_HEAD(&dev->chains);
2075 INIT_LIST_HEAD(&dev->streams);
2076 kref_init(&dev->ref);
2077 atomic_set(&dev->nmappings, 0);
2078 mutex_init(&dev->lock);
2079
2080 dev->udev = usb_get_dev(udev);
2081 dev->intf = usb_get_intf(intf);
2082 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
2083 dev->quirks = (uvc_quirks_param == -1)
2084 ? quirks : uvc_quirks_param;
2085 if (info)
2086 dev->meta_format = info->meta_format;
2087
2088 if (udev->product != NULL)
2089 strlcpy(dev->name, udev->product, sizeof(dev->name));
2090 else
2091 snprintf(dev->name, sizeof(dev->name),
2092 "UVC Camera (%04x:%04x)",
2093 le16_to_cpu(udev->descriptor.idVendor),
2094 le16_to_cpu(udev->descriptor.idProduct));
2095
2096 /*
2097 * Add iFunction or iInterface to names when available as additional
2098 * distinguishers between interfaces. iFunction is prioritized over
2099 * iInterface which matches Windows behavior at the point of writing.
2100 */
2101 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
2102 function = intf->intf_assoc->iFunction;
2103 else
2104 function = intf->cur_altsetting->desc.iInterface;
2105 if (function != 0) {
2106 size_t len;
2107
2108 strlcat(dev->name, ": ", sizeof(dev->name));
2109 len = strlen(dev->name);
2110 usb_string(udev, function, dev->name + len,
2111 sizeof(dev->name) - len);
2112 }
2113
2114 /* Parse the Video Class control descriptor. */
2115 if (uvc_parse_control(dev) < 0) {
2116 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
2117 "descriptors.\n");
2118 goto error;
2119 }
2120
2121 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2122 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2123 udev->product ? udev->product : "<unnamed>",
2124 le16_to_cpu(udev->descriptor.idVendor),
2125 le16_to_cpu(udev->descriptor.idProduct));
2126
2127 if (dev->quirks != quirks) {
2128 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
2129 "parameter for testing purpose.\n", dev->quirks);
2130 uvc_printk(KERN_INFO, "Please report required quirks to the "
2131 "linux-uvc-devel mailing list.\n");
2132 }
2133
2134 /* Initialize the media device and register the V4L2 device. */
2135 #ifdef CONFIG_MEDIA_CONTROLLER
2136 dev->mdev.dev = &intf->dev;
2137 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
2138 if (udev->serial)
2139 strlcpy(dev->mdev.serial, udev->serial,
2140 sizeof(dev->mdev.serial));
2141 strcpy(dev->mdev.bus_info, udev->devpath);
2142 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
2143 media_device_init(&dev->mdev);
2144
2145 dev->vdev.mdev = &dev->mdev;
2146 #endif
2147 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2148 goto error;
2149
2150 /* Initialize controls. */
2151 if (uvc_ctrl_init_device(dev) < 0)
2152 goto error;
2153
2154 /* Scan the device for video chains. */
2155 if (uvc_scan_device(dev) < 0)
2156 goto error;
2157
2158 /* Register video device nodes. */
2159 if (uvc_register_chains(dev) < 0)
2160 goto error;
2161
2162 #ifdef CONFIG_MEDIA_CONTROLLER
2163 /* Register the media device node */
2164 if (media_device_register(&dev->mdev) < 0)
2165 goto error;
2166 #endif
2167 /* Save our data pointer in the interface data. */
2168 usb_set_intfdata(intf, dev);
2169
2170 /* Initialize the interrupt URB. */
2171 if ((ret = uvc_status_init(dev)) < 0) {
2172 uvc_printk(KERN_INFO, "Unable to initialize the status "
2173 "endpoint (%d), status interrupt will not be "
2174 "supported.\n", ret);
2175 }
2176
2177 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
2178 usb_enable_autosuspend(udev);
2179 return 0;
2180
2181 error:
2182 uvc_unregister_video(dev);
2183 kref_put(&dev->ref, uvc_delete);
2184 return -ENODEV;
2185 }
2186
uvc_disconnect(struct usb_interface * intf)2187 static void uvc_disconnect(struct usb_interface *intf)
2188 {
2189 struct uvc_device *dev = usb_get_intfdata(intf);
2190
2191 /* Set the USB interface data to NULL. This can be done outside the
2192 * lock, as there's no other reader.
2193 */
2194 usb_set_intfdata(intf, NULL);
2195
2196 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2197 UVC_SC_VIDEOSTREAMING)
2198 return;
2199
2200 uvc_unregister_video(dev);
2201 kref_put(&dev->ref, uvc_delete);
2202 }
2203
uvc_suspend(struct usb_interface * intf,pm_message_t message)2204 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2205 {
2206 struct uvc_device *dev = usb_get_intfdata(intf);
2207 struct uvc_streaming *stream;
2208
2209 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
2210 intf->cur_altsetting->desc.bInterfaceNumber);
2211
2212 /* Controls are cached on the fly so they don't need to be saved. */
2213 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2214 UVC_SC_VIDEOCONTROL) {
2215 mutex_lock(&dev->lock);
2216 if (dev->users)
2217 uvc_status_stop(dev);
2218 mutex_unlock(&dev->lock);
2219 return 0;
2220 }
2221
2222 list_for_each_entry(stream, &dev->streams, list) {
2223 if (stream->intf == intf)
2224 return uvc_video_suspend(stream);
2225 }
2226
2227 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2228 "mismatch.\n");
2229 return -EINVAL;
2230 }
2231
__uvc_resume(struct usb_interface * intf,int reset)2232 static int __uvc_resume(struct usb_interface *intf, int reset)
2233 {
2234 struct uvc_device *dev = usb_get_intfdata(intf);
2235 struct uvc_streaming *stream;
2236 int ret = 0;
2237
2238 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2239 intf->cur_altsetting->desc.bInterfaceNumber);
2240
2241 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2242 UVC_SC_VIDEOCONTROL) {
2243 if (reset) {
2244 ret = uvc_ctrl_restore_values(dev);
2245 if (ret < 0)
2246 return ret;
2247 }
2248
2249 mutex_lock(&dev->lock);
2250 if (dev->users)
2251 ret = uvc_status_start(dev, GFP_NOIO);
2252 mutex_unlock(&dev->lock);
2253
2254 return ret;
2255 }
2256
2257 list_for_each_entry(stream, &dev->streams, list) {
2258 if (stream->intf == intf) {
2259 ret = uvc_video_resume(stream, reset);
2260 if (ret < 0)
2261 uvc_queue_streamoff(&stream->queue,
2262 stream->queue.queue.type);
2263 return ret;
2264 }
2265 }
2266
2267 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2268 "mismatch.\n");
2269 return -EINVAL;
2270 }
2271
uvc_resume(struct usb_interface * intf)2272 static int uvc_resume(struct usb_interface *intf)
2273 {
2274 return __uvc_resume(intf, 0);
2275 }
2276
uvc_reset_resume(struct usb_interface * intf)2277 static int uvc_reset_resume(struct usb_interface *intf)
2278 {
2279 return __uvc_resume(intf, 1);
2280 }
2281
2282 /* ------------------------------------------------------------------------
2283 * Module parameters
2284 */
2285
uvc_clock_param_get(char * buffer,const struct kernel_param * kp)2286 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
2287 {
2288 if (uvc_clock_param == CLOCK_MONOTONIC)
2289 return sprintf(buffer, "CLOCK_MONOTONIC");
2290 else
2291 return sprintf(buffer, "CLOCK_REALTIME");
2292 }
2293
uvc_clock_param_set(const char * val,const struct kernel_param * kp)2294 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
2295 {
2296 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2297 val += strlen("clock_");
2298
2299 if (strcasecmp(val, "monotonic") == 0)
2300 uvc_clock_param = CLOCK_MONOTONIC;
2301 else if (strcasecmp(val, "realtime") == 0)
2302 uvc_clock_param = CLOCK_REALTIME;
2303 else
2304 return -EINVAL;
2305
2306 return 0;
2307 }
2308
2309 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2310 &uvc_clock_param, S_IRUGO|S_IWUSR);
2311 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2312 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2313 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2314 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2315 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2316 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2317 MODULE_PARM_DESC(quirks, "Forced device quirks");
2318 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2319 MODULE_PARM_DESC(trace, "Trace level bitmask");
2320 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2321 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2322
2323 /* ------------------------------------------------------------------------
2324 * Driver initialization and cleanup
2325 */
2326
2327 static const struct uvc_device_info uvc_quirk_probe_minmax = {
2328 .quirks = UVC_QUIRK_PROBE_MINMAX,
2329 };
2330
2331 static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
2332 .quirks = UVC_QUIRK_FIX_BANDWIDTH,
2333 };
2334
2335 static const struct uvc_device_info uvc_quirk_probe_def = {
2336 .quirks = UVC_QUIRK_PROBE_DEF,
2337 };
2338
2339 static const struct uvc_device_info uvc_quirk_stream_no_fid = {
2340 .quirks = UVC_QUIRK_STREAM_NO_FID,
2341 };
2342
2343 static const struct uvc_device_info uvc_quirk_force_y8 = {
2344 .quirks = UVC_QUIRK_FORCE_Y8,
2345 };
2346
2347 #define UVC_QUIRK_INFO(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
2348
2349 /*
2350 * The Logitech cameras listed below have their interface class set to
2351 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2352 * though they are compliant.
2353 */
2354 static const struct usb_device_id uvc_ids[] = {
2355 /* LogiLink Wireless Webcam */
2356 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2357 | USB_DEVICE_ID_MATCH_INT_INFO,
2358 .idVendor = 0x0416,
2359 .idProduct = 0xa91a,
2360 .bInterfaceClass = USB_CLASS_VIDEO,
2361 .bInterfaceSubClass = 1,
2362 .bInterfaceProtocol = 0,
2363 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2364 /* Genius eFace 2025 */
2365 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2366 | USB_DEVICE_ID_MATCH_INT_INFO,
2367 .idVendor = 0x0458,
2368 .idProduct = 0x706e,
2369 .bInterfaceClass = USB_CLASS_VIDEO,
2370 .bInterfaceSubClass = 1,
2371 .bInterfaceProtocol = 0,
2372 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2373 /* Microsoft Lifecam NX-6000 */
2374 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2375 | USB_DEVICE_ID_MATCH_INT_INFO,
2376 .idVendor = 0x045e,
2377 .idProduct = 0x00f8,
2378 .bInterfaceClass = USB_CLASS_VIDEO,
2379 .bInterfaceSubClass = 1,
2380 .bInterfaceProtocol = 0,
2381 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2382 /* Microsoft Lifecam NX-3000 */
2383 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2384 | USB_DEVICE_ID_MATCH_INT_INFO,
2385 .idVendor = 0x045e,
2386 .idProduct = 0x0721,
2387 .bInterfaceClass = USB_CLASS_VIDEO,
2388 .bInterfaceSubClass = 1,
2389 .bInterfaceProtocol = 0,
2390 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2391 /* Microsoft Lifecam VX-7000 */
2392 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2393 | USB_DEVICE_ID_MATCH_INT_INFO,
2394 .idVendor = 0x045e,
2395 .idProduct = 0x0723,
2396 .bInterfaceClass = USB_CLASS_VIDEO,
2397 .bInterfaceSubClass = 1,
2398 .bInterfaceProtocol = 0,
2399 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2400 /* Logitech Quickcam Fusion */
2401 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2402 | USB_DEVICE_ID_MATCH_INT_INFO,
2403 .idVendor = 0x046d,
2404 .idProduct = 0x08c1,
2405 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2406 .bInterfaceSubClass = 1,
2407 .bInterfaceProtocol = 0 },
2408 /* Logitech Quickcam Orbit MP */
2409 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2410 | USB_DEVICE_ID_MATCH_INT_INFO,
2411 .idVendor = 0x046d,
2412 .idProduct = 0x08c2,
2413 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2414 .bInterfaceSubClass = 1,
2415 .bInterfaceProtocol = 0 },
2416 /* Logitech Quickcam Pro for Notebook */
2417 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2418 | USB_DEVICE_ID_MATCH_INT_INFO,
2419 .idVendor = 0x046d,
2420 .idProduct = 0x08c3,
2421 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2422 .bInterfaceSubClass = 1,
2423 .bInterfaceProtocol = 0 },
2424 /* Logitech Quickcam Pro 5000 */
2425 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2426 | USB_DEVICE_ID_MATCH_INT_INFO,
2427 .idVendor = 0x046d,
2428 .idProduct = 0x08c5,
2429 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2430 .bInterfaceSubClass = 1,
2431 .bInterfaceProtocol = 0 },
2432 /* Logitech Quickcam OEM Dell Notebook */
2433 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2434 | USB_DEVICE_ID_MATCH_INT_INFO,
2435 .idVendor = 0x046d,
2436 .idProduct = 0x08c6,
2437 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2438 .bInterfaceSubClass = 1,
2439 .bInterfaceProtocol = 0 },
2440 /* Logitech Quickcam OEM Cisco VT Camera II */
2441 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2442 | USB_DEVICE_ID_MATCH_INT_INFO,
2443 .idVendor = 0x046d,
2444 .idProduct = 0x08c7,
2445 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2446 .bInterfaceSubClass = 1,
2447 .bInterfaceProtocol = 0 },
2448 /* Logitech HD Pro Webcam C920 */
2449 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2450 | USB_DEVICE_ID_MATCH_INT_INFO,
2451 .idVendor = 0x046d,
2452 .idProduct = 0x082d,
2453 .bInterfaceClass = USB_CLASS_VIDEO,
2454 .bInterfaceSubClass = 1,
2455 .bInterfaceProtocol = 0,
2456 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
2457 /* Chicony CNF7129 (Asus EEE 100HE) */
2458 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2459 | USB_DEVICE_ID_MATCH_INT_INFO,
2460 .idVendor = 0x04f2,
2461 .idProduct = 0xb071,
2462 .bInterfaceClass = USB_CLASS_VIDEO,
2463 .bInterfaceSubClass = 1,
2464 .bInterfaceProtocol = 0,
2465 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTRICT_FRAME_RATE) },
2466 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2467 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2468 | USB_DEVICE_ID_MATCH_INT_INFO,
2469 .idVendor = 0x058f,
2470 .idProduct = 0x3820,
2471 .bInterfaceClass = USB_CLASS_VIDEO,
2472 .bInterfaceSubClass = 1,
2473 .bInterfaceProtocol = 0,
2474 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2475 /* Dell XPS m1530 */
2476 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2477 | USB_DEVICE_ID_MATCH_INT_INFO,
2478 .idVendor = 0x05a9,
2479 .idProduct = 0x2640,
2480 .bInterfaceClass = USB_CLASS_VIDEO,
2481 .bInterfaceSubClass = 1,
2482 .bInterfaceProtocol = 0,
2483 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2484 /* Dell SP2008WFP Monitor */
2485 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2486 | USB_DEVICE_ID_MATCH_INT_INFO,
2487 .idVendor = 0x05a9,
2488 .idProduct = 0x2641,
2489 .bInterfaceClass = USB_CLASS_VIDEO,
2490 .bInterfaceSubClass = 1,
2491 .bInterfaceProtocol = 0,
2492 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2493 /* Dell Alienware X51 */
2494 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2495 | USB_DEVICE_ID_MATCH_INT_INFO,
2496 .idVendor = 0x05a9,
2497 .idProduct = 0x2643,
2498 .bInterfaceClass = USB_CLASS_VIDEO,
2499 .bInterfaceSubClass = 1,
2500 .bInterfaceProtocol = 0,
2501 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2502 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2503 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2504 | USB_DEVICE_ID_MATCH_INT_INFO,
2505 .idVendor = 0x05a9,
2506 .idProduct = 0x264a,
2507 .bInterfaceClass = USB_CLASS_VIDEO,
2508 .bInterfaceSubClass = 1,
2509 .bInterfaceProtocol = 0,
2510 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2511 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2512 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2513 | USB_DEVICE_ID_MATCH_INT_INFO,
2514 .idVendor = 0x05a9,
2515 .idProduct = 0x7670,
2516 .bInterfaceClass = USB_CLASS_VIDEO,
2517 .bInterfaceSubClass = 1,
2518 .bInterfaceProtocol = 0,
2519 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2520 /* Apple Built-In iSight */
2521 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2522 | USB_DEVICE_ID_MATCH_INT_INFO,
2523 .idVendor = 0x05ac,
2524 .idProduct = 0x8501,
2525 .bInterfaceClass = USB_CLASS_VIDEO,
2526 .bInterfaceSubClass = 1,
2527 .bInterfaceProtocol = 0,
2528 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2529 | UVC_QUIRK_BUILTIN_ISIGHT) },
2530 /* Apple Built-In iSight via iBridge */
2531 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2532 | USB_DEVICE_ID_MATCH_INT_INFO,
2533 .idVendor = 0x05ac,
2534 .idProduct = 0x8600,
2535 .bInterfaceClass = USB_CLASS_VIDEO,
2536 .bInterfaceSubClass = 1,
2537 .bInterfaceProtocol = 0,
2538 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2539 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2540 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2541 | USB_DEVICE_ID_MATCH_INT_INFO,
2542 .idVendor = 0x05c8,
2543 .idProduct = 0x0403,
2544 .bInterfaceClass = USB_CLASS_VIDEO,
2545 .bInterfaceSubClass = 1,
2546 .bInterfaceProtocol = 0,
2547 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2548 /* Genesys Logic USB 2.0 PC Camera */
2549 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2550 | USB_DEVICE_ID_MATCH_INT_INFO,
2551 .idVendor = 0x05e3,
2552 .idProduct = 0x0505,
2553 .bInterfaceClass = USB_CLASS_VIDEO,
2554 .bInterfaceSubClass = 1,
2555 .bInterfaceProtocol = 0,
2556 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2557 /* Hercules Classic Silver */
2558 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2559 | USB_DEVICE_ID_MATCH_INT_INFO,
2560 .idVendor = 0x06f8,
2561 .idProduct = 0x300c,
2562 .bInterfaceClass = USB_CLASS_VIDEO,
2563 .bInterfaceSubClass = 1,
2564 .bInterfaceProtocol = 0,
2565 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2566 /* ViMicro Vega */
2567 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2568 | USB_DEVICE_ID_MATCH_INT_INFO,
2569 .idVendor = 0x0ac8,
2570 .idProduct = 0x332d,
2571 .bInterfaceClass = USB_CLASS_VIDEO,
2572 .bInterfaceSubClass = 1,
2573 .bInterfaceProtocol = 0,
2574 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2575 /* ViMicro - Minoru3D */
2576 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2577 | USB_DEVICE_ID_MATCH_INT_INFO,
2578 .idVendor = 0x0ac8,
2579 .idProduct = 0x3410,
2580 .bInterfaceClass = USB_CLASS_VIDEO,
2581 .bInterfaceSubClass = 1,
2582 .bInterfaceProtocol = 0,
2583 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2584 /* ViMicro Venus - Minoru3D */
2585 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2586 | USB_DEVICE_ID_MATCH_INT_INFO,
2587 .idVendor = 0x0ac8,
2588 .idProduct = 0x3420,
2589 .bInterfaceClass = USB_CLASS_VIDEO,
2590 .bInterfaceSubClass = 1,
2591 .bInterfaceProtocol = 0,
2592 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2593 /* Ophir Optronics - SPCAM 620U */
2594 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2595 | USB_DEVICE_ID_MATCH_INT_INFO,
2596 .idVendor = 0x0bd3,
2597 .idProduct = 0x0555,
2598 .bInterfaceClass = USB_CLASS_VIDEO,
2599 .bInterfaceSubClass = 1,
2600 .bInterfaceProtocol = 0,
2601 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2602 /* MT6227 */
2603 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2604 | USB_DEVICE_ID_MATCH_INT_INFO,
2605 .idVendor = 0x0e8d,
2606 .idProduct = 0x0004,
2607 .bInterfaceClass = USB_CLASS_VIDEO,
2608 .bInterfaceSubClass = 1,
2609 .bInterfaceProtocol = 0,
2610 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2611 | UVC_QUIRK_PROBE_DEF) },
2612 /* IMC Networks (Medion Akoya) */
2613 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2614 | USB_DEVICE_ID_MATCH_INT_INFO,
2615 .idVendor = 0x13d3,
2616 .idProduct = 0x5103,
2617 .bInterfaceClass = USB_CLASS_VIDEO,
2618 .bInterfaceSubClass = 1,
2619 .bInterfaceProtocol = 0,
2620 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2621 /* JMicron USB2.0 XGA WebCam */
2622 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2623 | USB_DEVICE_ID_MATCH_INT_INFO,
2624 .idVendor = 0x152d,
2625 .idProduct = 0x0310,
2626 .bInterfaceClass = USB_CLASS_VIDEO,
2627 .bInterfaceSubClass = 1,
2628 .bInterfaceProtocol = 0,
2629 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2630 /* Syntek (HP Spartan) */
2631 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2632 | USB_DEVICE_ID_MATCH_INT_INFO,
2633 .idVendor = 0x174f,
2634 .idProduct = 0x5212,
2635 .bInterfaceClass = USB_CLASS_VIDEO,
2636 .bInterfaceSubClass = 1,
2637 .bInterfaceProtocol = 0,
2638 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2639 /* Syntek (Samsung Q310) */
2640 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2641 | USB_DEVICE_ID_MATCH_INT_INFO,
2642 .idVendor = 0x174f,
2643 .idProduct = 0x5931,
2644 .bInterfaceClass = USB_CLASS_VIDEO,
2645 .bInterfaceSubClass = 1,
2646 .bInterfaceProtocol = 0,
2647 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2648 /* Syntek (Packard Bell EasyNote MX52 */
2649 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2650 | USB_DEVICE_ID_MATCH_INT_INFO,
2651 .idVendor = 0x174f,
2652 .idProduct = 0x8a12,
2653 .bInterfaceClass = USB_CLASS_VIDEO,
2654 .bInterfaceSubClass = 1,
2655 .bInterfaceProtocol = 0,
2656 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2657 /* Syntek (Asus F9SG) */
2658 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2659 | USB_DEVICE_ID_MATCH_INT_INFO,
2660 .idVendor = 0x174f,
2661 .idProduct = 0x8a31,
2662 .bInterfaceClass = USB_CLASS_VIDEO,
2663 .bInterfaceSubClass = 1,
2664 .bInterfaceProtocol = 0,
2665 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2666 /* Syntek (Asus U3S) */
2667 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2668 | USB_DEVICE_ID_MATCH_INT_INFO,
2669 .idVendor = 0x174f,
2670 .idProduct = 0x8a33,
2671 .bInterfaceClass = USB_CLASS_VIDEO,
2672 .bInterfaceSubClass = 1,
2673 .bInterfaceProtocol = 0,
2674 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2675 /* Syntek (JAOtech Smart Terminal) */
2676 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2677 | USB_DEVICE_ID_MATCH_INT_INFO,
2678 .idVendor = 0x174f,
2679 .idProduct = 0x8a34,
2680 .bInterfaceClass = USB_CLASS_VIDEO,
2681 .bInterfaceSubClass = 1,
2682 .bInterfaceProtocol = 0,
2683 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2684 /* Miricle 307K */
2685 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2686 | USB_DEVICE_ID_MATCH_INT_INFO,
2687 .idVendor = 0x17dc,
2688 .idProduct = 0x0202,
2689 .bInterfaceClass = USB_CLASS_VIDEO,
2690 .bInterfaceSubClass = 1,
2691 .bInterfaceProtocol = 0,
2692 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2693 /* Lenovo Thinkpad SL400/SL500 */
2694 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2695 | USB_DEVICE_ID_MATCH_INT_INFO,
2696 .idVendor = 0x17ef,
2697 .idProduct = 0x480b,
2698 .bInterfaceClass = USB_CLASS_VIDEO,
2699 .bInterfaceSubClass = 1,
2700 .bInterfaceProtocol = 0,
2701 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2702 /* Aveo Technology USB 2.0 Camera */
2703 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2704 | USB_DEVICE_ID_MATCH_INT_INFO,
2705 .idVendor = 0x1871,
2706 .idProduct = 0x0306,
2707 .bInterfaceClass = USB_CLASS_VIDEO,
2708 .bInterfaceSubClass = 1,
2709 .bInterfaceProtocol = 0,
2710 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2711 | UVC_QUIRK_PROBE_EXTRAFIELDS) },
2712 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2713 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2714 | USB_DEVICE_ID_MATCH_INT_INFO,
2715 .idVendor = 0x1871,
2716 .idProduct = 0x0516,
2717 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2718 .bInterfaceSubClass = 1,
2719 .bInterfaceProtocol = 0 },
2720 /* Ecamm Pico iMage */
2721 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2722 | USB_DEVICE_ID_MATCH_INT_INFO,
2723 .idVendor = 0x18cd,
2724 .idProduct = 0xcafe,
2725 .bInterfaceClass = USB_CLASS_VIDEO,
2726 .bInterfaceSubClass = 1,
2727 .bInterfaceProtocol = 0,
2728 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_EXTRAFIELDS) },
2729 /* Manta MM-353 Plako */
2730 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2731 | USB_DEVICE_ID_MATCH_INT_INFO,
2732 .idVendor = 0x18ec,
2733 .idProduct = 0x3188,
2734 .bInterfaceClass = USB_CLASS_VIDEO,
2735 .bInterfaceSubClass = 1,
2736 .bInterfaceProtocol = 0,
2737 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2738 /* FSC WebCam V30S */
2739 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2740 | USB_DEVICE_ID_MATCH_INT_INFO,
2741 .idVendor = 0x18ec,
2742 .idProduct = 0x3288,
2743 .bInterfaceClass = USB_CLASS_VIDEO,
2744 .bInterfaceSubClass = 1,
2745 .bInterfaceProtocol = 0,
2746 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2747 /* Arkmicro unbranded */
2748 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2749 | USB_DEVICE_ID_MATCH_INT_INFO,
2750 .idVendor = 0x18ec,
2751 .idProduct = 0x3290,
2752 .bInterfaceClass = USB_CLASS_VIDEO,
2753 .bInterfaceSubClass = 1,
2754 .bInterfaceProtocol = 0,
2755 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2756 /* The Imaging Source USB CCD cameras */
2757 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2758 | USB_DEVICE_ID_MATCH_INT_INFO,
2759 .idVendor = 0x199e,
2760 .idProduct = 0x8102,
2761 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2762 .bInterfaceSubClass = 1,
2763 .bInterfaceProtocol = 0 },
2764 /* Bodelin ProScopeHR */
2765 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2766 | USB_DEVICE_ID_MATCH_DEV_HI
2767 | USB_DEVICE_ID_MATCH_INT_INFO,
2768 .idVendor = 0x19ab,
2769 .idProduct = 0x1000,
2770 .bcdDevice_hi = 0x0126,
2771 .bInterfaceClass = USB_CLASS_VIDEO,
2772 .bInterfaceSubClass = 1,
2773 .bInterfaceProtocol = 0,
2774 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_STATUS_INTERVAL) },
2775 /* MSI StarCam 370i */
2776 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2777 | USB_DEVICE_ID_MATCH_INT_INFO,
2778 .idVendor = 0x1b3b,
2779 .idProduct = 0x2951,
2780 .bInterfaceClass = USB_CLASS_VIDEO,
2781 .bInterfaceSubClass = 1,
2782 .bInterfaceProtocol = 0,
2783 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2784 /* Generalplus Technology Inc. 808 Camera */
2785 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2786 | USB_DEVICE_ID_MATCH_INT_INFO,
2787 .idVendor = 0x1b3f,
2788 .idProduct = 0x2002,
2789 .bInterfaceClass = USB_CLASS_VIDEO,
2790 .bInterfaceSubClass = 1,
2791 .bInterfaceProtocol = 0,
2792 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2793 /* SiGma Micro USB Web Camera */
2794 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2795 | USB_DEVICE_ID_MATCH_INT_INFO,
2796 .idVendor = 0x1c4f,
2797 .idProduct = 0x3000,
2798 .bInterfaceClass = USB_CLASS_VIDEO,
2799 .bInterfaceSubClass = 1,
2800 .bInterfaceProtocol = 0,
2801 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
2802 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
2803 /* Oculus VR Positional Tracker DK2 */
2804 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2805 | USB_DEVICE_ID_MATCH_INT_INFO,
2806 .idVendor = 0x2833,
2807 .idProduct = 0x0201,
2808 .bInterfaceClass = USB_CLASS_VIDEO,
2809 .bInterfaceSubClass = 1,
2810 .bInterfaceProtocol = 0,
2811 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2812 /* Oculus VR Rift Sensor */
2813 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2814 | USB_DEVICE_ID_MATCH_INT_INFO,
2815 .idVendor = 0x2833,
2816 .idProduct = 0x0211,
2817 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2818 .bInterfaceSubClass = 1,
2819 .bInterfaceProtocol = 0,
2820 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2821 /* Generic USB Video Class */
2822 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
2823 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
2824 {}
2825 };
2826
2827 MODULE_DEVICE_TABLE(usb, uvc_ids);
2828
2829 struct uvc_driver uvc_driver = {
2830 .driver = {
2831 .name = "uvcvideo",
2832 .probe = uvc_probe,
2833 .disconnect = uvc_disconnect,
2834 .suspend = uvc_suspend,
2835 .resume = uvc_resume,
2836 .reset_resume = uvc_reset_resume,
2837 .id_table = uvc_ids,
2838 .supports_autosuspend = 1,
2839 },
2840 };
2841
uvc_init(void)2842 static int __init uvc_init(void)
2843 {
2844 int ret;
2845
2846 uvc_debugfs_init();
2847
2848 ret = usb_register(&uvc_driver.driver);
2849 if (ret < 0) {
2850 uvc_debugfs_cleanup();
2851 return ret;
2852 }
2853
2854 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2855 return 0;
2856 }
2857
uvc_cleanup(void)2858 static void __exit uvc_cleanup(void)
2859 {
2860 usb_deregister(&uvc_driver.driver);
2861 uvc_debugfs_cleanup();
2862 }
2863
2864 module_init(uvc_init);
2865 module_exit(uvc_cleanup);
2866
2867 MODULE_AUTHOR(DRIVER_AUTHOR);
2868 MODULE_DESCRIPTION(DRIVER_DESC);
2869 MODULE_LICENSE("GPL");
2870 MODULE_VERSION(DRIVER_VERSION);
2871
2872
