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
28 #include "uvcvideo.h"
29
30 #define DRIVER_AUTHOR "Laurent Pinchart " \
31 "<laurent.pinchart@ideasonboard.com>"
32 #define DRIVER_DESC "USB Video Class driver"
33
34 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
35 unsigned int uvc_hw_timestamps_param;
36 unsigned int uvc_no_drop_param;
37 static unsigned int uvc_quirks_param = -1;
38 unsigned int uvc_trace_param;
39 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
40
41 /* ------------------------------------------------------------------------
42 * Video formats
43 */
44
45 static struct uvc_format_desc uvc_fmts[] = {
46 {
47 .name = "YUV 4:2:2 (YUYV)",
48 .guid = UVC_GUID_FORMAT_YUY2,
49 .fcc = V4L2_PIX_FMT_YUYV,
50 },
51 {
52 .name = "YUV 4:2:2 (YUYV)",
53 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
54 .fcc = V4L2_PIX_FMT_YUYV,
55 },
56 {
57 .name = "YUV 4:2:0 (NV12)",
58 .guid = UVC_GUID_FORMAT_NV12,
59 .fcc = V4L2_PIX_FMT_NV12,
60 },
61 {
62 .name = "MJPEG",
63 .guid = UVC_GUID_FORMAT_MJPEG,
64 .fcc = V4L2_PIX_FMT_MJPEG,
65 },
66 {
67 .name = "YVU 4:2:0 (YV12)",
68 .guid = UVC_GUID_FORMAT_YV12,
69 .fcc = V4L2_PIX_FMT_YVU420,
70 },
71 {
72 .name = "YUV 4:2:0 (I420)",
73 .guid = UVC_GUID_FORMAT_I420,
74 .fcc = V4L2_PIX_FMT_YUV420,
75 },
76 {
77 .name = "YUV 4:2:0 (M420)",
78 .guid = UVC_GUID_FORMAT_M420,
79 .fcc = V4L2_PIX_FMT_M420,
80 },
81 {
82 .name = "YUV 4:2:2 (UYVY)",
83 .guid = UVC_GUID_FORMAT_UYVY,
84 .fcc = V4L2_PIX_FMT_UYVY,
85 },
86 {
87 .name = "Greyscale 8-bit (Y800)",
88 .guid = UVC_GUID_FORMAT_Y800,
89 .fcc = V4L2_PIX_FMT_GREY,
90 },
91 {
92 .name = "Greyscale 8-bit (Y8 )",
93 .guid = UVC_GUID_FORMAT_Y8,
94 .fcc = V4L2_PIX_FMT_GREY,
95 },
96 {
97 .name = "Greyscale 10-bit (Y10 )",
98 .guid = UVC_GUID_FORMAT_Y10,
99 .fcc = V4L2_PIX_FMT_Y10,
100 },
101 {
102 .name = "Greyscale 12-bit (Y12 )",
103 .guid = UVC_GUID_FORMAT_Y12,
104 .fcc = V4L2_PIX_FMT_Y12,
105 },
106 {
107 .name = "Greyscale 16-bit (Y16 )",
108 .guid = UVC_GUID_FORMAT_Y16,
109 .fcc = V4L2_PIX_FMT_Y16,
110 },
111 {
112 .name = "BGGR Bayer (BY8 )",
113 .guid = UVC_GUID_FORMAT_BY8,
114 .fcc = V4L2_PIX_FMT_SBGGR8,
115 },
116 {
117 .name = "BGGR Bayer (BA81)",
118 .guid = UVC_GUID_FORMAT_BA81,
119 .fcc = V4L2_PIX_FMT_SBGGR8,
120 },
121 {
122 .name = "GBRG Bayer (GBRG)",
123 .guid = UVC_GUID_FORMAT_GBRG,
124 .fcc = V4L2_PIX_FMT_SGBRG8,
125 },
126 {
127 .name = "GRBG Bayer (GRBG)",
128 .guid = UVC_GUID_FORMAT_GRBG,
129 .fcc = V4L2_PIX_FMT_SGRBG8,
130 },
131 {
132 .name = "RGGB Bayer (RGGB)",
133 .guid = UVC_GUID_FORMAT_RGGB,
134 .fcc = V4L2_PIX_FMT_SRGGB8,
135 },
136 {
137 .name = "RGB565",
138 .guid = UVC_GUID_FORMAT_RGBP,
139 .fcc = V4L2_PIX_FMT_RGB565,
140 },
141 {
142 .name = "BGR 8:8:8 (BGR3)",
143 .guid = UVC_GUID_FORMAT_BGR3,
144 .fcc = V4L2_PIX_FMT_BGR24,
145 },
146 {
147 .name = "H.264",
148 .guid = UVC_GUID_FORMAT_H264,
149 .fcc = V4L2_PIX_FMT_H264,
150 },
151 {
152 .name = "Greyscale 8 L/R (Y8I)",
153 .guid = UVC_GUID_FORMAT_Y8I,
154 .fcc = V4L2_PIX_FMT_Y8I,
155 },
156 {
157 .name = "Greyscale 12 L/R (Y12I)",
158 .guid = UVC_GUID_FORMAT_Y12I,
159 .fcc = V4L2_PIX_FMT_Y12I,
160 },
161 {
162 .name = "Depth data 16-bit (Z16)",
163 .guid = UVC_GUID_FORMAT_Z16,
164 .fcc = V4L2_PIX_FMT_Z16,
165 },
166 {
167 .name = "Bayer 10-bit (SRGGB10P)",
168 .guid = UVC_GUID_FORMAT_RW10,
169 .fcc = V4L2_PIX_FMT_SRGGB10P,
170 },
171 };
172
173 /* ------------------------------------------------------------------------
174 * Utility functions
175 */
176
uvc_find_endpoint(struct usb_host_interface * alts,__u8 epaddr)177 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
178 __u8 epaddr)
179 {
180 struct usb_host_endpoint *ep;
181 unsigned int i;
182
183 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
184 ep = &alts->endpoint[i];
185 if (ep->desc.bEndpointAddress == epaddr)
186 return ep;
187 }
188
189 return NULL;
190 }
191
uvc_format_by_guid(const __u8 guid[16])192 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
193 {
194 unsigned int len = ARRAY_SIZE(uvc_fmts);
195 unsigned int i;
196
197 for (i = 0; i < len; ++i) {
198 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
199 return &uvc_fmts[i];
200 }
201
202 return NULL;
203 }
204
uvc_colorspace(const __u8 primaries)205 static __u32 uvc_colorspace(const __u8 primaries)
206 {
207 static const __u8 colorprimaries[] = {
208 0,
209 V4L2_COLORSPACE_SRGB,
210 V4L2_COLORSPACE_470_SYSTEM_M,
211 V4L2_COLORSPACE_470_SYSTEM_BG,
212 V4L2_COLORSPACE_SMPTE170M,
213 V4L2_COLORSPACE_SMPTE240M,
214 };
215
216 if (primaries < ARRAY_SIZE(colorprimaries))
217 return colorprimaries[primaries];
218
219 return 0;
220 }
221
222 /* Simplify a fraction using a simple continued fraction decomposition. The
223 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
224 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
225 * arbitrary parameters to remove non-significative terms from the simple
226 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
227 * respectively seems to give nice results.
228 */
uvc_simplify_fraction(uint32_t * numerator,uint32_t * denominator,unsigned int n_terms,unsigned int threshold)229 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
230 unsigned int n_terms, unsigned int threshold)
231 {
232 uint32_t *an;
233 uint32_t x, y, r;
234 unsigned int i, n;
235
236 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
237 if (an == NULL)
238 return;
239
240 /* Convert the fraction to a simple continued fraction. See
241 * http://mathforum.org/dr.math/faq/faq.fractions.html
242 * Stop if the current term is bigger than or equal to the given
243 * threshold.
244 */
245 x = *numerator;
246 y = *denominator;
247
248 for (n = 0; n < n_terms && y != 0; ++n) {
249 an[n] = x / y;
250 if (an[n] >= threshold) {
251 if (n < 2)
252 n++;
253 break;
254 }
255
256 r = x - an[n] * y;
257 x = y;
258 y = r;
259 }
260
261 /* Expand the simple continued fraction back to an integer fraction. */
262 x = 0;
263 y = 1;
264
265 for (i = n; i > 0; --i) {
266 r = y;
267 y = an[i-1] * y + x;
268 x = r;
269 }
270
271 *numerator = y;
272 *denominator = x;
273 kfree(an);
274 }
275
276 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
277 * to compute numerator / denominator * 10000000 using 32 bit fixed point
278 * arithmetic only.
279 */
uvc_fraction_to_interval(uint32_t numerator,uint32_t denominator)280 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
281 {
282 uint32_t multiplier;
283
284 /* Saturate the result if the operation would overflow. */
285 if (denominator == 0 ||
286 numerator/denominator >= ((uint32_t)-1)/10000000)
287 return (uint32_t)-1;
288
289 /* Divide both the denominator and the multiplier by two until
290 * numerator * multiplier doesn't overflow. If anyone knows a better
291 * algorithm please let me know.
292 */
293 multiplier = 10000000;
294 while (numerator > ((uint32_t)-1)/multiplier) {
295 multiplier /= 2;
296 denominator /= 2;
297 }
298
299 return denominator ? numerator * multiplier / denominator : 0;
300 }
301
302 /* ------------------------------------------------------------------------
303 * Terminal and unit management
304 */
305
uvc_entity_by_id(struct uvc_device * dev,int id)306 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
307 {
308 struct uvc_entity *entity;
309
310 list_for_each_entry(entity, &dev->entities, list) {
311 if (entity->id == id)
312 return entity;
313 }
314
315 return NULL;
316 }
317
uvc_entity_by_reference(struct uvc_device * dev,int id,struct uvc_entity * entity)318 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
319 int id, struct uvc_entity *entity)
320 {
321 unsigned int i;
322
323 if (entity == NULL)
324 entity = list_entry(&dev->entities, struct uvc_entity, list);
325
326 list_for_each_entry_continue(entity, &dev->entities, list) {
327 for (i = 0; i < entity->bNrInPins; ++i)
328 if (entity->baSourceID[i] == id)
329 return entity;
330 }
331
332 return NULL;
333 }
334
uvc_stream_by_id(struct uvc_device * dev,int id)335 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
336 {
337 struct uvc_streaming *stream;
338
339 list_for_each_entry(stream, &dev->streams, list) {
340 if (stream->header.bTerminalLink == id)
341 return stream;
342 }
343
344 return NULL;
345 }
346
347 /* ------------------------------------------------------------------------
348 * Descriptors parsing
349 */
350
uvc_parse_format(struct uvc_device * dev,struct uvc_streaming * streaming,struct uvc_format * format,__u32 ** intervals,unsigned char * buffer,int buflen)351 static int uvc_parse_format(struct uvc_device *dev,
352 struct uvc_streaming *streaming, struct uvc_format *format,
353 __u32 **intervals, unsigned char *buffer, int buflen)
354 {
355 struct usb_interface *intf = streaming->intf;
356 struct usb_host_interface *alts = intf->cur_altsetting;
357 struct uvc_format_desc *fmtdesc;
358 struct uvc_frame *frame;
359 const unsigned char *start = buffer;
360 unsigned int width_multiplier = 1;
361 unsigned int interval;
362 unsigned int i, n;
363 __u8 ftype;
364
365 format->type = buffer[2];
366 format->index = buffer[3];
367
368 switch (buffer[2]) {
369 case UVC_VS_FORMAT_UNCOMPRESSED:
370 case UVC_VS_FORMAT_FRAME_BASED:
371 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
372 if (buflen < n) {
373 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
374 "interface %d FORMAT error\n",
375 dev->udev->devnum,
376 alts->desc.bInterfaceNumber);
377 return -EINVAL;
378 }
379
380 /* Find the format descriptor from its GUID. */
381 fmtdesc = uvc_format_by_guid(&buffer[5]);
382
383 if (fmtdesc != NULL) {
384 strlcpy(format->name, fmtdesc->name,
385 sizeof format->name);
386 format->fcc = fmtdesc->fcc;
387 } else {
388 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
389 &buffer[5]);
390 snprintf(format->name, sizeof(format->name), "%pUl\n",
391 &buffer[5]);
392 format->fcc = 0;
393 }
394
395 format->bpp = buffer[21];
396
397 /* Some devices report a format that doesn't match what they
398 * really send.
399 */
400 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
401 if (format->fcc == V4L2_PIX_FMT_YUYV) {
402 strlcpy(format->name, "Greyscale 8-bit (Y8 )",
403 sizeof(format->name));
404 format->fcc = V4L2_PIX_FMT_GREY;
405 format->bpp = 8;
406 width_multiplier = 2;
407 }
408 }
409
410 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
411 ftype = UVC_VS_FRAME_UNCOMPRESSED;
412 } else {
413 ftype = UVC_VS_FRAME_FRAME_BASED;
414 if (buffer[27])
415 format->flags = UVC_FMT_FLAG_COMPRESSED;
416 }
417 break;
418
419 case UVC_VS_FORMAT_MJPEG:
420 if (buflen < 11) {
421 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
422 "interface %d FORMAT error\n",
423 dev->udev->devnum,
424 alts->desc.bInterfaceNumber);
425 return -EINVAL;
426 }
427
428 strlcpy(format->name, "MJPEG", sizeof format->name);
429 format->fcc = V4L2_PIX_FMT_MJPEG;
430 format->flags = UVC_FMT_FLAG_COMPRESSED;
431 format->bpp = 0;
432 ftype = UVC_VS_FRAME_MJPEG;
433 break;
434
435 case UVC_VS_FORMAT_DV:
436 if (buflen < 9) {
437 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
438 "interface %d FORMAT error\n",
439 dev->udev->devnum,
440 alts->desc.bInterfaceNumber);
441 return -EINVAL;
442 }
443
444 switch (buffer[8] & 0x7f) {
445 case 0:
446 strlcpy(format->name, "SD-DV", sizeof format->name);
447 break;
448 case 1:
449 strlcpy(format->name, "SDL-DV", sizeof format->name);
450 break;
451 case 2:
452 strlcpy(format->name, "HD-DV", sizeof format->name);
453 break;
454 default:
455 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
456 "interface %d: unknown DV format %u\n",
457 dev->udev->devnum,
458 alts->desc.bInterfaceNumber, buffer[8]);
459 return -EINVAL;
460 }
461
462 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
463 sizeof format->name);
464
465 format->fcc = V4L2_PIX_FMT_DV;
466 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
467 format->bpp = 0;
468 ftype = 0;
469
470 /* Create a dummy frame descriptor. */
471 frame = &format->frame[0];
472 memset(&format->frame[0], 0, sizeof format->frame[0]);
473 frame->bFrameIntervalType = 1;
474 frame->dwDefaultFrameInterval = 1;
475 frame->dwFrameInterval = *intervals;
476 *(*intervals)++ = 1;
477 format->nframes = 1;
478 break;
479
480 case UVC_VS_FORMAT_MPEG2TS:
481 case UVC_VS_FORMAT_STREAM_BASED:
482 /* Not supported yet. */
483 default:
484 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
485 "interface %d unsupported format %u\n",
486 dev->udev->devnum, alts->desc.bInterfaceNumber,
487 buffer[2]);
488 return -EINVAL;
489 }
490
491 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
492
493 buflen -= buffer[0];
494 buffer += buffer[0];
495
496 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
497 * based formats have frame descriptors.
498 */
499 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
500 buffer[2] == ftype) {
501 frame = &format->frame[format->nframes];
502 if (ftype != UVC_VS_FRAME_FRAME_BASED)
503 n = buflen > 25 ? buffer[25] : 0;
504 else
505 n = buflen > 21 ? buffer[21] : 0;
506
507 n = n ? n : 3;
508
509 if (buflen < 26 + 4*n) {
510 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
511 "interface %d FRAME error\n", dev->udev->devnum,
512 alts->desc.bInterfaceNumber);
513 return -EINVAL;
514 }
515
516 frame->bFrameIndex = buffer[3];
517 frame->bmCapabilities = buffer[4];
518 frame->wWidth = get_unaligned_le16(&buffer[5])
519 * width_multiplier;
520 frame->wHeight = get_unaligned_le16(&buffer[7]);
521 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
522 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
523 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
524 frame->dwMaxVideoFrameBufferSize =
525 get_unaligned_le32(&buffer[17]);
526 frame->dwDefaultFrameInterval =
527 get_unaligned_le32(&buffer[21]);
528 frame->bFrameIntervalType = buffer[25];
529 } else {
530 frame->dwMaxVideoFrameBufferSize = 0;
531 frame->dwDefaultFrameInterval =
532 get_unaligned_le32(&buffer[17]);
533 frame->bFrameIntervalType = buffer[21];
534 }
535 frame->dwFrameInterval = *intervals;
536
537 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
538 * completely. Observed behaviours range from setting the
539 * value to 1.1x the actual frame size to hardwiring the
540 * 16 low bits to 0. This results in a higher than necessary
541 * memory usage as well as a wrong image size information. For
542 * uncompressed formats this can be fixed by computing the
543 * value from the frame size.
544 */
545 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
546 frame->dwMaxVideoFrameBufferSize = format->bpp
547 * frame->wWidth * frame->wHeight / 8;
548
549 /* Some bogus devices report dwMinFrameInterval equal to
550 * dwMaxFrameInterval and have dwFrameIntervalStep set to
551 * zero. Setting all null intervals to 1 fixes the problem and
552 * some other divisions by zero that could happen.
553 */
554 for (i = 0; i < n; ++i) {
555 interval = get_unaligned_le32(&buffer[26+4*i]);
556 *(*intervals)++ = interval ? interval : 1;
557 }
558
559 /* Make sure that the default frame interval stays between
560 * the boundaries.
561 */
562 n -= frame->bFrameIntervalType ? 1 : 2;
563 frame->dwDefaultFrameInterval =
564 min(frame->dwFrameInterval[n],
565 max(frame->dwFrameInterval[0],
566 frame->dwDefaultFrameInterval));
567
568 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
569 frame->bFrameIntervalType = 1;
570 frame->dwFrameInterval[0] =
571 frame->dwDefaultFrameInterval;
572 }
573
574 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
575 frame->wWidth, frame->wHeight,
576 10000000/frame->dwDefaultFrameInterval,
577 (100000000/frame->dwDefaultFrameInterval)%10);
578
579 format->nframes++;
580 buflen -= buffer[0];
581 buffer += buffer[0];
582 }
583
584 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
585 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
586 buflen -= buffer[0];
587 buffer += buffer[0];
588 }
589
590 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
591 buffer[2] == UVC_VS_COLORFORMAT) {
592 if (buflen < 6) {
593 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
594 "interface %d COLORFORMAT error\n",
595 dev->udev->devnum,
596 alts->desc.bInterfaceNumber);
597 return -EINVAL;
598 }
599
600 format->colorspace = uvc_colorspace(buffer[3]);
601
602 buflen -= buffer[0];
603 buffer += buffer[0];
604 }
605
606 return buffer - start;
607 }
608
uvc_parse_streaming(struct uvc_device * dev,struct usb_interface * intf)609 static int uvc_parse_streaming(struct uvc_device *dev,
610 struct usb_interface *intf)
611 {
612 struct uvc_streaming *streaming = NULL;
613 struct uvc_format *format;
614 struct uvc_frame *frame;
615 struct usb_host_interface *alts = &intf->altsetting[0];
616 unsigned char *_buffer, *buffer = alts->extra;
617 int _buflen, buflen = alts->extralen;
618 unsigned int nformats = 0, nframes = 0, nintervals = 0;
619 unsigned int size, i, n, p;
620 __u32 *interval;
621 __u16 psize;
622 int ret = -EINVAL;
623
624 if (intf->cur_altsetting->desc.bInterfaceSubClass
625 != UVC_SC_VIDEOSTREAMING) {
626 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
627 "video streaming interface\n", dev->udev->devnum,
628 intf->altsetting[0].desc.bInterfaceNumber);
629 return -EINVAL;
630 }
631
632 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
633 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
634 "claimed\n", dev->udev->devnum,
635 intf->altsetting[0].desc.bInterfaceNumber);
636 return -EINVAL;
637 }
638
639 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
640 if (streaming == NULL) {
641 usb_driver_release_interface(&uvc_driver.driver, intf);
642 return -EINVAL;
643 }
644
645 mutex_init(&streaming->mutex);
646 streaming->dev = dev;
647 streaming->intf = usb_get_intf(intf);
648 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
649
650 /* The Pico iMage webcam has its class-specific interface descriptors
651 * after the endpoint descriptors.
652 */
653 if (buflen == 0) {
654 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
655 struct usb_host_endpoint *ep = &alts->endpoint[i];
656
657 if (ep->extralen == 0)
658 continue;
659
660 if (ep->extralen > 2 &&
661 ep->extra[1] == USB_DT_CS_INTERFACE) {
662 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
663 "from endpoint %u.\n", i);
664 buffer = alts->endpoint[i].extra;
665 buflen = alts->endpoint[i].extralen;
666 break;
667 }
668 }
669 }
670
671 /* Skip the standard interface descriptors. */
672 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
673 buflen -= buffer[0];
674 buffer += buffer[0];
675 }
676
677 if (buflen <= 2) {
678 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
679 "interface descriptors found.\n");
680 goto error;
681 }
682
683 /* Parse the header descriptor. */
684 switch (buffer[2]) {
685 case UVC_VS_OUTPUT_HEADER:
686 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
687 size = 9;
688 break;
689
690 case UVC_VS_INPUT_HEADER:
691 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
692 size = 13;
693 break;
694
695 default:
696 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
697 "%d HEADER descriptor not found.\n", dev->udev->devnum,
698 alts->desc.bInterfaceNumber);
699 goto error;
700 }
701
702 p = buflen >= 4 ? buffer[3] : 0;
703 n = buflen >= size ? buffer[size-1] : 0;
704
705 if (buflen < size + p*n) {
706 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
707 "interface %d HEADER descriptor is invalid.\n",
708 dev->udev->devnum, alts->desc.bInterfaceNumber);
709 goto error;
710 }
711
712 streaming->header.bNumFormats = p;
713 streaming->header.bEndpointAddress = buffer[6];
714 if (buffer[2] == UVC_VS_INPUT_HEADER) {
715 streaming->header.bmInfo = buffer[7];
716 streaming->header.bTerminalLink = buffer[8];
717 streaming->header.bStillCaptureMethod = buffer[9];
718 streaming->header.bTriggerSupport = buffer[10];
719 streaming->header.bTriggerUsage = buffer[11];
720 } else {
721 streaming->header.bTerminalLink = buffer[7];
722 }
723 streaming->header.bControlSize = n;
724
725 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
726 GFP_KERNEL);
727 if (streaming->header.bmaControls == NULL) {
728 ret = -ENOMEM;
729 goto error;
730 }
731
732 buflen -= buffer[0];
733 buffer += buffer[0];
734
735 _buffer = buffer;
736 _buflen = buflen;
737
738 /* Count the format and frame descriptors. */
739 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
740 switch (_buffer[2]) {
741 case UVC_VS_FORMAT_UNCOMPRESSED:
742 case UVC_VS_FORMAT_MJPEG:
743 case UVC_VS_FORMAT_FRAME_BASED:
744 nformats++;
745 break;
746
747 case UVC_VS_FORMAT_DV:
748 /* DV format has no frame descriptor. We will create a
749 * dummy frame descriptor with a dummy frame interval.
750 */
751 nformats++;
752 nframes++;
753 nintervals++;
754 break;
755
756 case UVC_VS_FORMAT_MPEG2TS:
757 case UVC_VS_FORMAT_STREAM_BASED:
758 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
759 "interface %d FORMAT %u is not supported.\n",
760 dev->udev->devnum,
761 alts->desc.bInterfaceNumber, _buffer[2]);
762 break;
763
764 case UVC_VS_FRAME_UNCOMPRESSED:
765 case UVC_VS_FRAME_MJPEG:
766 nframes++;
767 if (_buflen > 25)
768 nintervals += _buffer[25] ? _buffer[25] : 3;
769 break;
770
771 case UVC_VS_FRAME_FRAME_BASED:
772 nframes++;
773 if (_buflen > 21)
774 nintervals += _buffer[21] ? _buffer[21] : 3;
775 break;
776 }
777
778 _buflen -= _buffer[0];
779 _buffer += _buffer[0];
780 }
781
782 if (nformats == 0) {
783 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
784 "%d has no supported formats defined.\n",
785 dev->udev->devnum, alts->desc.bInterfaceNumber);
786 goto error;
787 }
788
789 size = nformats * sizeof *format + nframes * sizeof *frame
790 + nintervals * sizeof *interval;
791 format = kzalloc(size, GFP_KERNEL);
792 if (format == NULL) {
793 ret = -ENOMEM;
794 goto error;
795 }
796
797 frame = (struct uvc_frame *)&format[nformats];
798 interval = (__u32 *)&frame[nframes];
799
800 streaming->format = format;
801 streaming->nformats = nformats;
802
803 /* Parse the format descriptors. */
804 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
805 switch (buffer[2]) {
806 case UVC_VS_FORMAT_UNCOMPRESSED:
807 case UVC_VS_FORMAT_MJPEG:
808 case UVC_VS_FORMAT_DV:
809 case UVC_VS_FORMAT_FRAME_BASED:
810 format->frame = frame;
811 ret = uvc_parse_format(dev, streaming, format,
812 &interval, buffer, buflen);
813 if (ret < 0)
814 goto error;
815
816 frame += format->nframes;
817 format++;
818
819 buflen -= ret;
820 buffer += ret;
821 continue;
822
823 default:
824 break;
825 }
826
827 buflen -= buffer[0];
828 buffer += buffer[0];
829 }
830
831 if (buflen)
832 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
833 "%d has %u bytes of trailing descriptor garbage.\n",
834 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
835
836 /* Parse the alternate settings to find the maximum bandwidth. */
837 for (i = 0; i < intf->num_altsetting; ++i) {
838 struct usb_host_endpoint *ep;
839 alts = &intf->altsetting[i];
840 ep = uvc_find_endpoint(alts,
841 streaming->header.bEndpointAddress);
842 if (ep == NULL)
843 continue;
844
845 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
846 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
847 if (psize > streaming->maxpsize)
848 streaming->maxpsize = psize;
849 }
850
851 list_add_tail(&streaming->list, &dev->streams);
852 return 0;
853
854 error:
855 usb_driver_release_interface(&uvc_driver.driver, intf);
856 usb_put_intf(intf);
857 kfree(streaming->format);
858 kfree(streaming->header.bmaControls);
859 kfree(streaming);
860 return ret;
861 }
862
uvc_alloc_entity(u16 type,u8 id,unsigned int num_pads,unsigned int extra_size)863 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
864 unsigned int num_pads, unsigned int extra_size)
865 {
866 struct uvc_entity *entity;
867 unsigned int num_inputs;
868 unsigned int size;
869 unsigned int i;
870
871 extra_size = roundup(extra_size, sizeof(*entity->pads));
872 if (num_pads)
873 num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
874 else
875 num_inputs = 0;
876 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
877 + num_inputs;
878 entity = kzalloc(size, GFP_KERNEL);
879 if (entity == NULL)
880 return NULL;
881
882 entity->id = id;
883 entity->type = type;
884
885 entity->num_links = 0;
886 entity->num_pads = num_pads;
887 entity->pads = ((void *)(entity + 1)) + extra_size;
888
889 for (i = 0; i < num_inputs; ++i)
890 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
891 if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
892 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
893
894 entity->bNrInPins = num_inputs;
895 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
896
897 return entity;
898 }
899
900 /* Parse vendor-specific extensions. */
uvc_parse_vendor_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)901 static int uvc_parse_vendor_control(struct uvc_device *dev,
902 const unsigned char *buffer, int buflen)
903 {
904 struct usb_device *udev = dev->udev;
905 struct usb_host_interface *alts = dev->intf->cur_altsetting;
906 struct uvc_entity *unit;
907 unsigned int n, p;
908 int handled = 0;
909
910 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
911 case 0x046d: /* Logitech */
912 if (buffer[1] != 0x41 || buffer[2] != 0x01)
913 break;
914
915 /* Logitech implements several vendor specific functions
916 * through vendor specific extension units (LXU).
917 *
918 * The LXU descriptors are similar to XU descriptors
919 * (see "USB Device Video Class for Video Devices", section
920 * 3.7.2.6 "Extension Unit Descriptor") with the following
921 * differences:
922 *
923 * ----------------------------------------------------------
924 * 0 bLength 1 Number
925 * Size of this descriptor, in bytes: 24+p+n*2
926 * ----------------------------------------------------------
927 * 23+p+n bmControlsType N Bitmap
928 * Individual bits in the set are defined:
929 * 0: Absolute
930 * 1: Relative
931 *
932 * This bitset is mapped exactly the same as bmControls.
933 * ----------------------------------------------------------
934 * 23+p+n*2 bReserved 1 Boolean
935 * ----------------------------------------------------------
936 * 24+p+n*2 iExtension 1 Index
937 * Index of a string descriptor that describes this
938 * extension unit.
939 * ----------------------------------------------------------
940 */
941 p = buflen >= 22 ? buffer[21] : 0;
942 n = buflen >= 25 + p ? buffer[22+p] : 0;
943
944 if (buflen < 25 + p + 2*n) {
945 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
946 "interface %d EXTENSION_UNIT error\n",
947 udev->devnum, alts->desc.bInterfaceNumber);
948 break;
949 }
950
951 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
952 p + 1, 2*n);
953 if (unit == NULL)
954 return -ENOMEM;
955
956 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
957 unit->extension.bNumControls = buffer[20];
958 memcpy(unit->baSourceID, &buffer[22], p);
959 unit->extension.bControlSize = buffer[22+p];
960 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
961 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
962 + n;
963 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
964
965 if (buffer[24+p+2*n] != 0)
966 usb_string(udev, buffer[24+p+2*n], unit->name,
967 sizeof unit->name);
968 else
969 sprintf(unit->name, "Extension %u", buffer[3]);
970
971 list_add_tail(&unit->list, &dev->entities);
972 handled = 1;
973 break;
974 }
975
976 return handled;
977 }
978
uvc_parse_standard_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)979 static int uvc_parse_standard_control(struct uvc_device *dev,
980 const unsigned char *buffer, int buflen)
981 {
982 struct usb_device *udev = dev->udev;
983 struct uvc_entity *unit, *term;
984 struct usb_interface *intf;
985 struct usb_host_interface *alts = dev->intf->cur_altsetting;
986 unsigned int i, n, p, len;
987 __u16 type;
988
989 switch (buffer[2]) {
990 case UVC_VC_HEADER:
991 n = buflen >= 12 ? buffer[11] : 0;
992
993 if (buflen < 12 + n) {
994 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
995 "interface %d HEADER error\n", udev->devnum,
996 alts->desc.bInterfaceNumber);
997 return -EINVAL;
998 }
999
1000 dev->uvc_version = get_unaligned_le16(&buffer[3]);
1001 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
1002
1003 /* Parse all USB Video Streaming interfaces. */
1004 for (i = 0; i < n; ++i) {
1005 intf = usb_ifnum_to_if(udev, buffer[12+i]);
1006 if (intf == NULL) {
1007 uvc_trace(UVC_TRACE_DESCR, "device %d "
1008 "interface %d doesn't exists\n",
1009 udev->devnum, i);
1010 continue;
1011 }
1012
1013 uvc_parse_streaming(dev, intf);
1014 }
1015 break;
1016
1017 case UVC_VC_INPUT_TERMINAL:
1018 if (buflen < 8) {
1019 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1020 "interface %d INPUT_TERMINAL error\n",
1021 udev->devnum, alts->desc.bInterfaceNumber);
1022 return -EINVAL;
1023 }
1024
1025 /*
1026 * Reject invalid terminal types that would cause issues:
1027 *
1028 * - The high byte must be non-zero, otherwise it would be
1029 * confused with a unit.
1030 *
1031 * - Bit 15 must be 0, as we use it internally as a terminal
1032 * direction flag.
1033 *
1034 * Other unknown types are accepted.
1035 */
1036 type = get_unaligned_le16(&buffer[4]);
1037 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) {
1038 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1039 "interface %d INPUT_TERMINAL %d has invalid "
1040 "type 0x%04x, skipping\n", udev->devnum,
1041 alts->desc.bInterfaceNumber,
1042 buffer[3], type);
1043 return 0;
1044 }
1045
1046 n = 0;
1047 p = 0;
1048 len = 8;
1049
1050 if (type == UVC_ITT_CAMERA) {
1051 n = buflen >= 15 ? buffer[14] : 0;
1052 len = 15;
1053
1054 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1055 n = buflen >= 9 ? buffer[8] : 0;
1056 p = buflen >= 10 + n ? buffer[9+n] : 0;
1057 len = 10;
1058 }
1059
1060 if (buflen < len + n + p) {
1061 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1062 "interface %d INPUT_TERMINAL error\n",
1063 udev->devnum, alts->desc.bInterfaceNumber);
1064 return -EINVAL;
1065 }
1066
1067 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1068 1, n + p);
1069 if (term == NULL)
1070 return -ENOMEM;
1071
1072 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1073 term->camera.bControlSize = n;
1074 term->camera.bmControls = (__u8 *)term + sizeof *term;
1075 term->camera.wObjectiveFocalLengthMin =
1076 get_unaligned_le16(&buffer[8]);
1077 term->camera.wObjectiveFocalLengthMax =
1078 get_unaligned_le16(&buffer[10]);
1079 term->camera.wOcularFocalLength =
1080 get_unaligned_le16(&buffer[12]);
1081 memcpy(term->camera.bmControls, &buffer[15], n);
1082 } else if (UVC_ENTITY_TYPE(term) ==
1083 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1084 term->media.bControlSize = n;
1085 term->media.bmControls = (__u8 *)term + sizeof *term;
1086 term->media.bTransportModeSize = p;
1087 term->media.bmTransportModes = (__u8 *)term
1088 + sizeof *term + n;
1089 memcpy(term->media.bmControls, &buffer[9], n);
1090 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1091 }
1092
1093 if (buffer[7] != 0)
1094 usb_string(udev, buffer[7], term->name,
1095 sizeof term->name);
1096 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1097 sprintf(term->name, "Camera %u", buffer[3]);
1098 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1099 sprintf(term->name, "Media %u", buffer[3]);
1100 else
1101 sprintf(term->name, "Input %u", buffer[3]);
1102
1103 list_add_tail(&term->list, &dev->entities);
1104 break;
1105
1106 case UVC_VC_OUTPUT_TERMINAL:
1107 if (buflen < 9) {
1108 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1109 "interface %d OUTPUT_TERMINAL error\n",
1110 udev->devnum, alts->desc.bInterfaceNumber);
1111 return -EINVAL;
1112 }
1113
1114 /* Make sure the terminal type MSB is not null, otherwise it
1115 * could be confused with a unit.
1116 */
1117 type = get_unaligned_le16(&buffer[4]);
1118 if ((type & 0xff00) == 0) {
1119 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1120 "interface %d OUTPUT_TERMINAL %d has invalid "
1121 "type 0x%04x, skipping\n", udev->devnum,
1122 alts->desc.bInterfaceNumber, buffer[3], type);
1123 return 0;
1124 }
1125
1126 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1127 1, 0);
1128 if (term == NULL)
1129 return -ENOMEM;
1130
1131 memcpy(term->baSourceID, &buffer[7], 1);
1132
1133 if (buffer[8] != 0)
1134 usb_string(udev, buffer[8], term->name,
1135 sizeof term->name);
1136 else
1137 sprintf(term->name, "Output %u", buffer[3]);
1138
1139 list_add_tail(&term->list, &dev->entities);
1140 break;
1141
1142 case UVC_VC_SELECTOR_UNIT:
1143 p = buflen >= 5 ? buffer[4] : 0;
1144
1145 if (buflen < 5 || buflen < 6 + p) {
1146 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1147 "interface %d SELECTOR_UNIT error\n",
1148 udev->devnum, alts->desc.bInterfaceNumber);
1149 return -EINVAL;
1150 }
1151
1152 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1153 if (unit == NULL)
1154 return -ENOMEM;
1155
1156 memcpy(unit->baSourceID, &buffer[5], p);
1157
1158 if (buffer[5+p] != 0)
1159 usb_string(udev, buffer[5+p], unit->name,
1160 sizeof unit->name);
1161 else
1162 sprintf(unit->name, "Selector %u", buffer[3]);
1163
1164 list_add_tail(&unit->list, &dev->entities);
1165 break;
1166
1167 case UVC_VC_PROCESSING_UNIT:
1168 n = buflen >= 8 ? buffer[7] : 0;
1169 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1170
1171 if (buflen < p + n) {
1172 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1173 "interface %d PROCESSING_UNIT error\n",
1174 udev->devnum, alts->desc.bInterfaceNumber);
1175 return -EINVAL;
1176 }
1177
1178 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1179 if (unit == NULL)
1180 return -ENOMEM;
1181
1182 memcpy(unit->baSourceID, &buffer[4], 1);
1183 unit->processing.wMaxMultiplier =
1184 get_unaligned_le16(&buffer[5]);
1185 unit->processing.bControlSize = buffer[7];
1186 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1187 memcpy(unit->processing.bmControls, &buffer[8], n);
1188 if (dev->uvc_version >= 0x0110)
1189 unit->processing.bmVideoStandards = buffer[9+n];
1190
1191 if (buffer[8+n] != 0)
1192 usb_string(udev, buffer[8+n], unit->name,
1193 sizeof unit->name);
1194 else
1195 sprintf(unit->name, "Processing %u", buffer[3]);
1196
1197 list_add_tail(&unit->list, &dev->entities);
1198 break;
1199
1200 case UVC_VC_EXTENSION_UNIT:
1201 p = buflen >= 22 ? buffer[21] : 0;
1202 n = buflen >= 24 + p ? buffer[22+p] : 0;
1203
1204 if (buflen < 24 + p + n) {
1205 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1206 "interface %d EXTENSION_UNIT error\n",
1207 udev->devnum, alts->desc.bInterfaceNumber);
1208 return -EINVAL;
1209 }
1210
1211 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1212 if (unit == NULL)
1213 return -ENOMEM;
1214
1215 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1216 unit->extension.bNumControls = buffer[20];
1217 memcpy(unit->baSourceID, &buffer[22], p);
1218 unit->extension.bControlSize = buffer[22+p];
1219 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
1220 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1221
1222 if (buffer[23+p+n] != 0)
1223 usb_string(udev, buffer[23+p+n], unit->name,
1224 sizeof unit->name);
1225 else
1226 sprintf(unit->name, "Extension %u", buffer[3]);
1227
1228 list_add_tail(&unit->list, &dev->entities);
1229 break;
1230
1231 default:
1232 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1233 "descriptor (%u)\n", buffer[2]);
1234 break;
1235 }
1236
1237 return 0;
1238 }
1239
uvc_parse_control(struct uvc_device * dev)1240 static int uvc_parse_control(struct uvc_device *dev)
1241 {
1242 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1243 unsigned char *buffer = alts->extra;
1244 int buflen = alts->extralen;
1245 int ret;
1246
1247 /* Parse the default alternate setting only, as the UVC specification
1248 * defines a single alternate setting, the default alternate setting
1249 * zero.
1250 */
1251
1252 while (buflen > 2) {
1253 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1254 buffer[1] != USB_DT_CS_INTERFACE)
1255 goto next_descriptor;
1256
1257 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1258 return ret;
1259
1260 next_descriptor:
1261 buflen -= buffer[0];
1262 buffer += buffer[0];
1263 }
1264
1265 /* Check if the optional status endpoint is present. Built-in iSight
1266 * webcams have an interrupt endpoint but spit proprietary data that
1267 * don't conform to the UVC status endpoint messages. Don't try to
1268 * handle the interrupt endpoint for those cameras.
1269 */
1270 if (alts->desc.bNumEndpoints == 1 &&
1271 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1272 struct usb_host_endpoint *ep = &alts->endpoint[0];
1273 struct usb_endpoint_descriptor *desc = &ep->desc;
1274
1275 if (usb_endpoint_is_int_in(desc) &&
1276 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1277 desc->bInterval != 0) {
1278 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1279 "(addr %02x).\n", desc->bEndpointAddress);
1280 dev->int_ep = ep;
1281 }
1282 }
1283
1284 return 0;
1285 }
1286
1287 /* ------------------------------------------------------------------------
1288 * UVC device scan
1289 */
1290
1291 /*
1292 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1293 * and containing the following units:
1294 *
1295 * - one or more Output Terminals (USB Streaming or Display)
1296 * - zero or one Processing Unit
1297 * - zero, one or more single-input Selector Units
1298 * - zero or one multiple-input Selector Units, provided all inputs are
1299 * connected to input terminals
1300 * - zero, one or mode single-input Extension Units
1301 * - one or more Input Terminals (Camera, External or USB Streaming)
1302 *
1303 * The terminal and units must match on of the following structures:
1304 *
1305 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1306 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1307 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1308 *
1309 * +---------+ +---------+ -> OTT_*(0)
1310 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1311 * +---------+ +---------+ -> OTT_*(n)
1312 *
1313 * The Processing Unit and Extension Units can be in any order. Additional
1314 * Extension Units connected to the main chain as single-unit branches are
1315 * also supported. Single-input Selector Units are ignored.
1316 */
uvc_scan_chain_entity(struct uvc_video_chain * chain,struct uvc_entity * entity)1317 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1318 struct uvc_entity *entity)
1319 {
1320 switch (UVC_ENTITY_TYPE(entity)) {
1321 case UVC_VC_EXTENSION_UNIT:
1322 if (uvc_trace_param & UVC_TRACE_PROBE)
1323 printk(" <- XU %d", entity->id);
1324
1325 if (entity->bNrInPins != 1) {
1326 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1327 "than 1 input pin.\n", entity->id);
1328 return -1;
1329 }
1330
1331 break;
1332
1333 case UVC_VC_PROCESSING_UNIT:
1334 if (uvc_trace_param & UVC_TRACE_PROBE)
1335 printk(" <- PU %d", entity->id);
1336
1337 if (chain->processing != NULL) {
1338 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1339 "Processing Units in chain.\n");
1340 return -1;
1341 }
1342
1343 chain->processing = entity;
1344 break;
1345
1346 case UVC_VC_SELECTOR_UNIT:
1347 if (uvc_trace_param & UVC_TRACE_PROBE)
1348 printk(" <- SU %d", entity->id);
1349
1350 /* Single-input selector units are ignored. */
1351 if (entity->bNrInPins == 1)
1352 break;
1353
1354 if (chain->selector != NULL) {
1355 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1356 "Units in chain.\n");
1357 return -1;
1358 }
1359
1360 chain->selector = entity;
1361 break;
1362
1363 case UVC_ITT_VENDOR_SPECIFIC:
1364 case UVC_ITT_CAMERA:
1365 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1366 if (uvc_trace_param & UVC_TRACE_PROBE)
1367 printk(" <- IT %d\n", entity->id);
1368
1369 break;
1370
1371 case UVC_OTT_VENDOR_SPECIFIC:
1372 case UVC_OTT_DISPLAY:
1373 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1374 if (uvc_trace_param & UVC_TRACE_PROBE)
1375 printk(" OT %d", entity->id);
1376
1377 break;
1378
1379 case UVC_TT_STREAMING:
1380 if (UVC_ENTITY_IS_ITERM(entity)) {
1381 if (uvc_trace_param & UVC_TRACE_PROBE)
1382 printk(" <- IT %d\n", entity->id);
1383 } else {
1384 if (uvc_trace_param & UVC_TRACE_PROBE)
1385 printk(" OT %d", entity->id);
1386 }
1387
1388 break;
1389
1390 default:
1391 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1392 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1393 return -1;
1394 }
1395
1396 list_add_tail(&entity->chain, &chain->entities);
1397 return 0;
1398 }
1399
uvc_scan_chain_forward(struct uvc_video_chain * chain,struct uvc_entity * entity,struct uvc_entity * prev)1400 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1401 struct uvc_entity *entity, struct uvc_entity *prev)
1402 {
1403 struct uvc_entity *forward;
1404 int found;
1405
1406 /* Forward scan */
1407 forward = NULL;
1408 found = 0;
1409
1410 while (1) {
1411 forward = uvc_entity_by_reference(chain->dev, entity->id,
1412 forward);
1413 if (forward == NULL)
1414 break;
1415 if (forward == prev)
1416 continue;
1417 if (forward->chain.next || forward->chain.prev) {
1418 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1419 "entity %d already in chain.\n", forward->id);
1420 return -EINVAL;
1421 }
1422
1423 switch (UVC_ENTITY_TYPE(forward)) {
1424 case UVC_VC_EXTENSION_UNIT:
1425 if (forward->bNrInPins != 1) {
1426 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1427 "has more than 1 input pin.\n",
1428 entity->id);
1429 return -EINVAL;
1430 }
1431
1432 list_add_tail(&forward->chain, &chain->entities);
1433 if (uvc_trace_param & UVC_TRACE_PROBE) {
1434 if (!found)
1435 printk(" (->");
1436
1437 printk(" XU %d", forward->id);
1438 found = 1;
1439 }
1440 break;
1441
1442 case UVC_OTT_VENDOR_SPECIFIC:
1443 case UVC_OTT_DISPLAY:
1444 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1445 case UVC_TT_STREAMING:
1446 if (UVC_ENTITY_IS_ITERM(forward)) {
1447 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1448 "terminal %u.\n", forward->id);
1449 return -EINVAL;
1450 }
1451
1452 list_add_tail(&forward->chain, &chain->entities);
1453 if (uvc_trace_param & UVC_TRACE_PROBE) {
1454 if (!found)
1455 printk(" (->");
1456
1457 printk(" OT %d", forward->id);
1458 found = 1;
1459 }
1460 break;
1461 }
1462 }
1463 if (found)
1464 printk(")");
1465
1466 return 0;
1467 }
1468
uvc_scan_chain_backward(struct uvc_video_chain * chain,struct uvc_entity ** _entity)1469 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1470 struct uvc_entity **_entity)
1471 {
1472 struct uvc_entity *entity = *_entity;
1473 struct uvc_entity *term;
1474 int id = -EINVAL, i;
1475
1476 switch (UVC_ENTITY_TYPE(entity)) {
1477 case UVC_VC_EXTENSION_UNIT:
1478 case UVC_VC_PROCESSING_UNIT:
1479 id = entity->baSourceID[0];
1480 break;
1481
1482 case UVC_VC_SELECTOR_UNIT:
1483 /* Single-input selector units are ignored. */
1484 if (entity->bNrInPins == 1) {
1485 id = entity->baSourceID[0];
1486 break;
1487 }
1488
1489 if (uvc_trace_param & UVC_TRACE_PROBE)
1490 printk(" <- IT");
1491
1492 chain->selector = entity;
1493 for (i = 0; i < entity->bNrInPins; ++i) {
1494 id = entity->baSourceID[i];
1495 term = uvc_entity_by_id(chain->dev, id);
1496 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1497 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1498 "input %d isn't connected to an "
1499 "input terminal\n", entity->id, i);
1500 return -1;
1501 }
1502
1503 if (term->chain.next || term->chain.prev) {
1504 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1505 "entity %d already in chain.\n",
1506 term->id);
1507 return -EINVAL;
1508 }
1509
1510 if (uvc_trace_param & UVC_TRACE_PROBE)
1511 printk(" %d", term->id);
1512
1513 list_add_tail(&term->chain, &chain->entities);
1514 uvc_scan_chain_forward(chain, term, entity);
1515 }
1516
1517 if (uvc_trace_param & UVC_TRACE_PROBE)
1518 printk("\n");
1519
1520 id = 0;
1521 break;
1522
1523 case UVC_ITT_VENDOR_SPECIFIC:
1524 case UVC_ITT_CAMERA:
1525 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1526 case UVC_OTT_VENDOR_SPECIFIC:
1527 case UVC_OTT_DISPLAY:
1528 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1529 case UVC_TT_STREAMING:
1530 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1531 break;
1532 }
1533
1534 if (id <= 0) {
1535 *_entity = NULL;
1536 return id;
1537 }
1538
1539 entity = uvc_entity_by_id(chain->dev, id);
1540 if (entity == NULL) {
1541 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1542 "unknown entity %d.\n", id);
1543 return -EINVAL;
1544 }
1545
1546 *_entity = entity;
1547 return 0;
1548 }
1549
uvc_scan_chain(struct uvc_video_chain * chain,struct uvc_entity * term)1550 static int uvc_scan_chain(struct uvc_video_chain *chain,
1551 struct uvc_entity *term)
1552 {
1553 struct uvc_entity *entity, *prev;
1554
1555 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1556
1557 entity = term;
1558 prev = NULL;
1559
1560 while (entity != NULL) {
1561 /* Entity must not be part of an existing chain */
1562 if (entity->chain.next || entity->chain.prev) {
1563 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1564 "entity %d already in chain.\n", entity->id);
1565 return -EINVAL;
1566 }
1567
1568 /* Process entity */
1569 if (uvc_scan_chain_entity(chain, entity) < 0)
1570 return -EINVAL;
1571
1572 /* Forward scan */
1573 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1574 return -EINVAL;
1575
1576 /* Backward scan */
1577 prev = entity;
1578 if (uvc_scan_chain_backward(chain, &entity) < 0)
1579 return -EINVAL;
1580 }
1581
1582 return 0;
1583 }
1584
uvc_print_terms(struct list_head * terms,u16 dir,char * buffer)1585 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1586 char *buffer)
1587 {
1588 struct uvc_entity *term;
1589 unsigned int nterms = 0;
1590 char *p = buffer;
1591
1592 list_for_each_entry(term, terms, chain) {
1593 if (!UVC_ENTITY_IS_TERM(term) ||
1594 UVC_TERM_DIRECTION(term) != dir)
1595 continue;
1596
1597 if (nterms)
1598 p += sprintf(p, ",");
1599 if (++nterms >= 4) {
1600 p += sprintf(p, "...");
1601 break;
1602 }
1603 p += sprintf(p, "%u", term->id);
1604 }
1605
1606 return p - buffer;
1607 }
1608
uvc_print_chain(struct uvc_video_chain * chain)1609 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1610 {
1611 static char buffer[43];
1612 char *p = buffer;
1613
1614 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1615 p += sprintf(p, " -> ");
1616 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1617
1618 return buffer;
1619 }
1620
uvc_alloc_chain(struct uvc_device * dev)1621 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1622 {
1623 struct uvc_video_chain *chain;
1624
1625 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1626 if (chain == NULL)
1627 return NULL;
1628
1629 INIT_LIST_HEAD(&chain->entities);
1630 mutex_init(&chain->ctrl_mutex);
1631 chain->dev = dev;
1632 v4l2_prio_init(&chain->prio);
1633
1634 return chain;
1635 }
1636
1637 /*
1638 * Fallback heuristic for devices that don't connect units and terminals in a
1639 * valid chain.
1640 *
1641 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1642 * to fail, but if we just take the entities we can find and put them together
1643 * in the most sensible chain we can think of, turns out they do work anyway.
1644 * Note: This heuristic assumes there is a single chain.
1645 *
1646 * At the time of writing, devices known to have such a broken chain are
1647 * - Acer Integrated Camera (5986:055a)
1648 * - Realtek rtl157a7 (0bda:57a7)
1649 */
uvc_scan_fallback(struct uvc_device * dev)1650 static int uvc_scan_fallback(struct uvc_device *dev)
1651 {
1652 struct uvc_video_chain *chain;
1653 struct uvc_entity *iterm = NULL;
1654 struct uvc_entity *oterm = NULL;
1655 struct uvc_entity *entity;
1656 struct uvc_entity *prev;
1657
1658 /*
1659 * Start by locating the input and output terminals. We only support
1660 * devices with exactly one of each for now.
1661 */
1662 list_for_each_entry(entity, &dev->entities, list) {
1663 if (UVC_ENTITY_IS_ITERM(entity)) {
1664 if (iterm)
1665 return -EINVAL;
1666 iterm = entity;
1667 }
1668
1669 if (UVC_ENTITY_IS_OTERM(entity)) {
1670 if (oterm)
1671 return -EINVAL;
1672 oterm = entity;
1673 }
1674 }
1675
1676 if (iterm == NULL || oterm == NULL)
1677 return -EINVAL;
1678
1679 /* Allocate the chain and fill it. */
1680 chain = uvc_alloc_chain(dev);
1681 if (chain == NULL)
1682 return -ENOMEM;
1683
1684 if (uvc_scan_chain_entity(chain, oterm) < 0)
1685 goto error;
1686
1687 prev = oterm;
1688
1689 /*
1690 * Add all Processing and Extension Units with two pads. The order
1691 * doesn't matter much, use reverse list traversal to connect units in
1692 * UVC descriptor order as we build the chain from output to input. This
1693 * leads to units appearing in the order meant by the manufacturer for
1694 * the cameras known to require this heuristic.
1695 */
1696 list_for_each_entry_reverse(entity, &dev->entities, list) {
1697 if (entity->type != UVC_VC_PROCESSING_UNIT &&
1698 entity->type != UVC_VC_EXTENSION_UNIT)
1699 continue;
1700
1701 if (entity->num_pads != 2)
1702 continue;
1703
1704 if (uvc_scan_chain_entity(chain, entity) < 0)
1705 goto error;
1706
1707 prev->baSourceID[0] = entity->id;
1708 prev = entity;
1709 }
1710
1711 if (uvc_scan_chain_entity(chain, iterm) < 0)
1712 goto error;
1713
1714 prev->baSourceID[0] = iterm->id;
1715
1716 list_add_tail(&chain->list, &dev->chains);
1717
1718 uvc_trace(UVC_TRACE_PROBE,
1719 "Found a video chain by fallback heuristic (%s).\n",
1720 uvc_print_chain(chain));
1721
1722 return 0;
1723
1724 error:
1725 kfree(chain);
1726 return -EINVAL;
1727 }
1728
1729 /*
1730 * Scan the device for video chains and register video devices.
1731 *
1732 * Chains are scanned starting at their output terminals and walked backwards.
1733 */
uvc_scan_device(struct uvc_device * dev)1734 static int uvc_scan_device(struct uvc_device *dev)
1735 {
1736 struct uvc_video_chain *chain;
1737 struct uvc_entity *term;
1738
1739 list_for_each_entry(term, &dev->entities, list) {
1740 if (!UVC_ENTITY_IS_OTERM(term))
1741 continue;
1742
1743 /* If the terminal is already included in a chain, skip it.
1744 * This can happen for chains that have multiple output
1745 * terminals, where all output terminals beside the first one
1746 * will be inserted in the chain in forward scans.
1747 */
1748 if (term->chain.next || term->chain.prev)
1749 continue;
1750
1751 chain = uvc_alloc_chain(dev);
1752 if (chain == NULL)
1753 return -ENOMEM;
1754
1755 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1756
1757 if (uvc_scan_chain(chain, term) < 0) {
1758 kfree(chain);
1759 continue;
1760 }
1761
1762 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1763 uvc_print_chain(chain));
1764
1765 list_add_tail(&chain->list, &dev->chains);
1766 }
1767
1768 if (list_empty(&dev->chains))
1769 uvc_scan_fallback(dev);
1770
1771 if (list_empty(&dev->chains)) {
1772 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1773 return -1;
1774 }
1775
1776 return 0;
1777 }
1778
1779 /* ------------------------------------------------------------------------
1780 * Video device registration and unregistration
1781 */
1782
1783 /*
1784 * Delete the UVC device.
1785 *
1786 * Called by the kernel when the last reference to the uvc_device structure
1787 * is released.
1788 *
1789 * As this function is called after or during disconnect(), all URBs have
1790 * already been canceled by the USB core. There is no need to kill the
1791 * interrupt URB manually.
1792 */
uvc_delete(struct uvc_device * dev)1793 static void uvc_delete(struct uvc_device *dev)
1794 {
1795 struct list_head *p, *n;
1796
1797 uvc_status_cleanup(dev);
1798 uvc_ctrl_cleanup_device(dev);
1799
1800 usb_put_intf(dev->intf);
1801 usb_put_dev(dev->udev);
1802
1803 if (dev->vdev.dev)
1804 v4l2_device_unregister(&dev->vdev);
1805 #ifdef CONFIG_MEDIA_CONTROLLER
1806 if (media_devnode_is_registered(dev->mdev.devnode))
1807 media_device_unregister(&dev->mdev);
1808 #endif
1809
1810 list_for_each_safe(p, n, &dev->chains) {
1811 struct uvc_video_chain *chain;
1812 chain = list_entry(p, struct uvc_video_chain, list);
1813 kfree(chain);
1814 }
1815
1816 list_for_each_safe(p, n, &dev->entities) {
1817 struct uvc_entity *entity;
1818 entity = list_entry(p, struct uvc_entity, list);
1819 #ifdef CONFIG_MEDIA_CONTROLLER
1820 uvc_mc_cleanup_entity(entity);
1821 #endif
1822 kfree(entity);
1823 }
1824
1825 list_for_each_safe(p, n, &dev->streams) {
1826 struct uvc_streaming *streaming;
1827 streaming = list_entry(p, struct uvc_streaming, list);
1828 usb_driver_release_interface(&uvc_driver.driver,
1829 streaming->intf);
1830 usb_put_intf(streaming->intf);
1831 kfree(streaming->format);
1832 kfree(streaming->header.bmaControls);
1833 kfree(streaming);
1834 }
1835
1836 kfree(dev);
1837 }
1838
uvc_release(struct video_device * vdev)1839 static void uvc_release(struct video_device *vdev)
1840 {
1841 struct uvc_streaming *stream = video_get_drvdata(vdev);
1842 struct uvc_device *dev = stream->dev;
1843
1844 /* Decrement the registered streams count and delete the device when it
1845 * reaches zero.
1846 */
1847 if (atomic_dec_and_test(&dev->nstreams))
1848 uvc_delete(dev);
1849 }
1850
1851 /*
1852 * Unregister the video devices.
1853 */
uvc_unregister_video(struct uvc_device * dev)1854 static void uvc_unregister_video(struct uvc_device *dev)
1855 {
1856 struct uvc_streaming *stream;
1857
1858 /* Unregistering all video devices might result in uvc_delete() being
1859 * called from inside the loop if there's no open file handle. To avoid
1860 * that, increment the stream count before iterating over the streams
1861 * and decrement it when done.
1862 */
1863 atomic_inc(&dev->nstreams);
1864
1865 list_for_each_entry(stream, &dev->streams, list) {
1866 if (!video_is_registered(&stream->vdev))
1867 continue;
1868
1869 video_unregister_device(&stream->vdev);
1870
1871 uvc_debugfs_cleanup_stream(stream);
1872 }
1873
1874 /* Decrement the stream count and call uvc_delete explicitly if there
1875 * are no stream left.
1876 */
1877 if (atomic_dec_and_test(&dev->nstreams))
1878 uvc_delete(dev);
1879 }
1880
uvc_register_video(struct uvc_device * dev,struct uvc_streaming * stream)1881 static int uvc_register_video(struct uvc_device *dev,
1882 struct uvc_streaming *stream)
1883 {
1884 struct video_device *vdev = &stream->vdev;
1885 int ret;
1886
1887 /* Initialize the video buffers queue. */
1888 ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
1889 if (ret)
1890 return ret;
1891
1892 /* Initialize the streaming interface with default streaming
1893 * parameters.
1894 */
1895 ret = uvc_video_init(stream);
1896 if (ret < 0) {
1897 uvc_printk(KERN_ERR, "Failed to initialize the device "
1898 "(%d).\n", ret);
1899 return ret;
1900 }
1901
1902 uvc_debugfs_init_stream(stream);
1903
1904 /* Register the device with V4L. */
1905
1906 /* We already hold a reference to dev->udev. The video device will be
1907 * unregistered before the reference is released, so we don't need to
1908 * get another one.
1909 */
1910 vdev->v4l2_dev = &dev->vdev;
1911 vdev->fops = &uvc_fops;
1912 vdev->ioctl_ops = &uvc_ioctl_ops;
1913 vdev->release = uvc_release;
1914 vdev->prio = &stream->chain->prio;
1915 if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1916 vdev->vfl_dir = VFL_DIR_TX;
1917 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1918
1919 /* Set the driver data before calling video_register_device, otherwise
1920 * uvc_v4l2_open might race us.
1921 */
1922 video_set_drvdata(vdev, stream);
1923
1924 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1925 if (ret < 0) {
1926 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
1927 ret);
1928 return ret;
1929 }
1930
1931 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1932 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE;
1933 else
1934 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1935
1936 atomic_inc(&dev->nstreams);
1937 return 0;
1938 }
1939
1940 /*
1941 * Register all video devices in all chains.
1942 */
uvc_register_terms(struct uvc_device * dev,struct uvc_video_chain * chain)1943 static int uvc_register_terms(struct uvc_device *dev,
1944 struct uvc_video_chain *chain)
1945 {
1946 struct uvc_streaming *stream;
1947 struct uvc_entity *term;
1948 int ret;
1949
1950 list_for_each_entry(term, &chain->entities, chain) {
1951 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1952 continue;
1953
1954 stream = uvc_stream_by_id(dev, term->id);
1955 if (stream == NULL) {
1956 uvc_printk(KERN_INFO, "No streaming interface found "
1957 "for terminal %u.", term->id);
1958 continue;
1959 }
1960
1961 stream->chain = chain;
1962 ret = uvc_register_video(dev, stream);
1963 if (ret < 0)
1964 return ret;
1965
1966 term->vdev = &stream->vdev;
1967 }
1968
1969 return 0;
1970 }
1971
uvc_register_chains(struct uvc_device * dev)1972 static int uvc_register_chains(struct uvc_device *dev)
1973 {
1974 struct uvc_video_chain *chain;
1975 int ret;
1976
1977 list_for_each_entry(chain, &dev->chains, list) {
1978 ret = uvc_register_terms(dev, chain);
1979 if (ret < 0)
1980 return ret;
1981
1982 #ifdef CONFIG_MEDIA_CONTROLLER
1983 ret = uvc_mc_register_entities(chain);
1984 if (ret < 0) {
1985 uvc_printk(KERN_INFO, "Failed to register entites "
1986 "(%d).\n", ret);
1987 }
1988 #endif
1989 }
1990
1991 return 0;
1992 }
1993
1994 /* ------------------------------------------------------------------------
1995 * USB probe, disconnect, suspend and resume
1996 */
1997
uvc_probe(struct usb_interface * intf,const struct usb_device_id * id)1998 static int uvc_probe(struct usb_interface *intf,
1999 const struct usb_device_id *id)
2000 {
2001 struct usb_device *udev = interface_to_usbdev(intf);
2002 struct uvc_device *dev;
2003 int ret;
2004
2005 if (id->idVendor && id->idProduct)
2006 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
2007 "(%04x:%04x)\n", udev->devpath, id->idVendor,
2008 id->idProduct);
2009 else
2010 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
2011 udev->devpath);
2012
2013 /* Allocate memory for the device and initialize it. */
2014 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
2015 return -ENOMEM;
2016
2017 INIT_LIST_HEAD(&dev->entities);
2018 INIT_LIST_HEAD(&dev->chains);
2019 INIT_LIST_HEAD(&dev->streams);
2020 atomic_set(&dev->nstreams, 0);
2021 atomic_set(&dev->nmappings, 0);
2022 mutex_init(&dev->lock);
2023
2024 dev->udev = usb_get_dev(udev);
2025 dev->intf = usb_get_intf(intf);
2026 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
2027 dev->quirks = (uvc_quirks_param == -1)
2028 ? id->driver_info : uvc_quirks_param;
2029
2030 if (udev->product != NULL)
2031 strlcpy(dev->name, udev->product, sizeof dev->name);
2032 else
2033 snprintf(dev->name, sizeof dev->name,
2034 "UVC Camera (%04x:%04x)",
2035 le16_to_cpu(udev->descriptor.idVendor),
2036 le16_to_cpu(udev->descriptor.idProduct));
2037
2038 /* Parse the Video Class control descriptor. */
2039 if (uvc_parse_control(dev) < 0) {
2040 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
2041 "descriptors.\n");
2042 goto error;
2043 }
2044
2045 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2046 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2047 udev->product ? udev->product : "<unnamed>",
2048 le16_to_cpu(udev->descriptor.idVendor),
2049 le16_to_cpu(udev->descriptor.idProduct));
2050
2051 if (dev->quirks != id->driver_info) {
2052 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
2053 "parameter for testing purpose.\n", dev->quirks);
2054 uvc_printk(KERN_INFO, "Please report required quirks to the "
2055 "linux-uvc-devel mailing list.\n");
2056 }
2057
2058 /* Register the media and V4L2 devices. */
2059 #ifdef CONFIG_MEDIA_CONTROLLER
2060 dev->mdev.dev = &intf->dev;
2061 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
2062 if (udev->serial)
2063 strlcpy(dev->mdev.serial, udev->serial,
2064 sizeof(dev->mdev.serial));
2065 strcpy(dev->mdev.bus_info, udev->devpath);
2066 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
2067 dev->mdev.driver_version = LINUX_VERSION_CODE;
2068 if (media_device_register(&dev->mdev) < 0)
2069 goto error;
2070
2071 dev->vdev.mdev = &dev->mdev;
2072 #endif
2073 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2074 goto error;
2075
2076 /* Initialize controls. */
2077 if (uvc_ctrl_init_device(dev) < 0)
2078 goto error;
2079
2080 /* Scan the device for video chains. */
2081 if (uvc_scan_device(dev) < 0)
2082 goto error;
2083
2084 /* Register video device nodes. */
2085 if (uvc_register_chains(dev) < 0)
2086 goto error;
2087
2088 /* Save our data pointer in the interface data. */
2089 usb_set_intfdata(intf, dev);
2090
2091 /* Initialize the interrupt URB. */
2092 if ((ret = uvc_status_init(dev)) < 0) {
2093 uvc_printk(KERN_INFO, "Unable to initialize the status "
2094 "endpoint (%d), status interrupt will not be "
2095 "supported.\n", ret);
2096 }
2097
2098 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
2099 usb_enable_autosuspend(udev);
2100 return 0;
2101
2102 error:
2103 uvc_unregister_video(dev);
2104 return -ENODEV;
2105 }
2106
uvc_disconnect(struct usb_interface * intf)2107 static void uvc_disconnect(struct usb_interface *intf)
2108 {
2109 struct uvc_device *dev = usb_get_intfdata(intf);
2110
2111 /* Set the USB interface data to NULL. This can be done outside the
2112 * lock, as there's no other reader.
2113 */
2114 usb_set_intfdata(intf, NULL);
2115
2116 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2117 UVC_SC_VIDEOSTREAMING)
2118 return;
2119
2120 uvc_unregister_video(dev);
2121 }
2122
uvc_suspend(struct usb_interface * intf,pm_message_t message)2123 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2124 {
2125 struct uvc_device *dev = usb_get_intfdata(intf);
2126 struct uvc_streaming *stream;
2127
2128 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
2129 intf->cur_altsetting->desc.bInterfaceNumber);
2130
2131 /* Controls are cached on the fly so they don't need to be saved. */
2132 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2133 UVC_SC_VIDEOCONTROL) {
2134 mutex_lock(&dev->lock);
2135 if (dev->users)
2136 uvc_status_stop(dev);
2137 mutex_unlock(&dev->lock);
2138 return 0;
2139 }
2140
2141 list_for_each_entry(stream, &dev->streams, list) {
2142 if (stream->intf == intf)
2143 return uvc_video_suspend(stream);
2144 }
2145
2146 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2147 "mismatch.\n");
2148 return -EINVAL;
2149 }
2150
__uvc_resume(struct usb_interface * intf,int reset)2151 static int __uvc_resume(struct usb_interface *intf, int reset)
2152 {
2153 struct uvc_device *dev = usb_get_intfdata(intf);
2154 struct uvc_streaming *stream;
2155 int ret = 0;
2156
2157 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2158 intf->cur_altsetting->desc.bInterfaceNumber);
2159
2160 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2161 UVC_SC_VIDEOCONTROL) {
2162 if (reset) {
2163 ret = uvc_ctrl_restore_values(dev);
2164 if (ret < 0)
2165 return ret;
2166 }
2167
2168 mutex_lock(&dev->lock);
2169 if (dev->users)
2170 ret = uvc_status_start(dev, GFP_NOIO);
2171 mutex_unlock(&dev->lock);
2172
2173 return ret;
2174 }
2175
2176 list_for_each_entry(stream, &dev->streams, list) {
2177 if (stream->intf == intf) {
2178 ret = uvc_video_resume(stream, reset);
2179 if (ret < 0)
2180 uvc_queue_streamoff(&stream->queue,
2181 stream->queue.queue.type);
2182 return ret;
2183 }
2184 }
2185
2186 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2187 "mismatch.\n");
2188 return -EINVAL;
2189 }
2190
uvc_resume(struct usb_interface * intf)2191 static int uvc_resume(struct usb_interface *intf)
2192 {
2193 return __uvc_resume(intf, 0);
2194 }
2195
uvc_reset_resume(struct usb_interface * intf)2196 static int uvc_reset_resume(struct usb_interface *intf)
2197 {
2198 return __uvc_resume(intf, 1);
2199 }
2200
2201 /* ------------------------------------------------------------------------
2202 * Module parameters
2203 */
2204
uvc_clock_param_get(char * buffer,struct kernel_param * kp)2205 static int uvc_clock_param_get(char *buffer, struct kernel_param *kp)
2206 {
2207 if (uvc_clock_param == CLOCK_MONOTONIC)
2208 return sprintf(buffer, "CLOCK_MONOTONIC");
2209 else
2210 return sprintf(buffer, "CLOCK_REALTIME");
2211 }
2212
uvc_clock_param_set(const char * val,struct kernel_param * kp)2213 static int uvc_clock_param_set(const char *val, struct kernel_param *kp)
2214 {
2215 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2216 val += strlen("clock_");
2217
2218 if (strcasecmp(val, "monotonic") == 0)
2219 uvc_clock_param = CLOCK_MONOTONIC;
2220 else if (strcasecmp(val, "realtime") == 0)
2221 uvc_clock_param = CLOCK_REALTIME;
2222 else
2223 return -EINVAL;
2224
2225 return 0;
2226 }
2227
2228 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2229 &uvc_clock_param, S_IRUGO|S_IWUSR);
2230 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2231 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2232 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2233 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2234 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2235 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2236 MODULE_PARM_DESC(quirks, "Forced device quirks");
2237 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2238 MODULE_PARM_DESC(trace, "Trace level bitmask");
2239 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2240 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2241
2242 /* ------------------------------------------------------------------------
2243 * Driver initialization and cleanup
2244 */
2245
2246 /*
2247 * The Logitech cameras listed below have their interface class set to
2248 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2249 * though they are compliant.
2250 */
2251 static struct usb_device_id uvc_ids[] = {
2252 /* LogiLink Wireless Webcam */
2253 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2254 | USB_DEVICE_ID_MATCH_INT_INFO,
2255 .idVendor = 0x0416,
2256 .idProduct = 0xa91a,
2257 .bInterfaceClass = USB_CLASS_VIDEO,
2258 .bInterfaceSubClass = 1,
2259 .bInterfaceProtocol = 0,
2260 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2261 /* Genius eFace 2025 */
2262 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2263 | USB_DEVICE_ID_MATCH_INT_INFO,
2264 .idVendor = 0x0458,
2265 .idProduct = 0x706e,
2266 .bInterfaceClass = USB_CLASS_VIDEO,
2267 .bInterfaceSubClass = 1,
2268 .bInterfaceProtocol = 0,
2269 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2270 /* Microsoft Lifecam NX-6000 */
2271 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2272 | USB_DEVICE_ID_MATCH_INT_INFO,
2273 .idVendor = 0x045e,
2274 .idProduct = 0x00f8,
2275 .bInterfaceClass = USB_CLASS_VIDEO,
2276 .bInterfaceSubClass = 1,
2277 .bInterfaceProtocol = 0,
2278 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2279 /* Microsoft Lifecam NX-3000 */
2280 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2281 | USB_DEVICE_ID_MATCH_INT_INFO,
2282 .idVendor = 0x045e,
2283 .idProduct = 0x0721,
2284 .bInterfaceClass = USB_CLASS_VIDEO,
2285 .bInterfaceSubClass = 1,
2286 .bInterfaceProtocol = 0,
2287 .driver_info = UVC_QUIRK_PROBE_DEF },
2288 /* Microsoft Lifecam VX-7000 */
2289 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2290 | USB_DEVICE_ID_MATCH_INT_INFO,
2291 .idVendor = 0x045e,
2292 .idProduct = 0x0723,
2293 .bInterfaceClass = USB_CLASS_VIDEO,
2294 .bInterfaceSubClass = 1,
2295 .bInterfaceProtocol = 0,
2296 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2297 /* Logitech Quickcam Fusion */
2298 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2299 | USB_DEVICE_ID_MATCH_INT_INFO,
2300 .idVendor = 0x046d,
2301 .idProduct = 0x08c1,
2302 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2303 .bInterfaceSubClass = 1,
2304 .bInterfaceProtocol = 0 },
2305 /* Logitech Quickcam Orbit MP */
2306 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2307 | USB_DEVICE_ID_MATCH_INT_INFO,
2308 .idVendor = 0x046d,
2309 .idProduct = 0x08c2,
2310 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2311 .bInterfaceSubClass = 1,
2312 .bInterfaceProtocol = 0 },
2313 /* Logitech Quickcam Pro for Notebook */
2314 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2315 | USB_DEVICE_ID_MATCH_INT_INFO,
2316 .idVendor = 0x046d,
2317 .idProduct = 0x08c3,
2318 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2319 .bInterfaceSubClass = 1,
2320 .bInterfaceProtocol = 0 },
2321 /* Logitech Quickcam Pro 5000 */
2322 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2323 | USB_DEVICE_ID_MATCH_INT_INFO,
2324 .idVendor = 0x046d,
2325 .idProduct = 0x08c5,
2326 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2327 .bInterfaceSubClass = 1,
2328 .bInterfaceProtocol = 0 },
2329 /* Logitech Quickcam OEM Dell Notebook */
2330 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2331 | USB_DEVICE_ID_MATCH_INT_INFO,
2332 .idVendor = 0x046d,
2333 .idProduct = 0x08c6,
2334 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2335 .bInterfaceSubClass = 1,
2336 .bInterfaceProtocol = 0 },
2337 /* Logitech Quickcam OEM Cisco VT Camera II */
2338 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2339 | USB_DEVICE_ID_MATCH_INT_INFO,
2340 .idVendor = 0x046d,
2341 .idProduct = 0x08c7,
2342 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2343 .bInterfaceSubClass = 1,
2344 .bInterfaceProtocol = 0 },
2345 /* Logitech HD Pro Webcam C920 */
2346 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2347 | USB_DEVICE_ID_MATCH_INT_INFO,
2348 .idVendor = 0x046d,
2349 .idProduct = 0x082d,
2350 .bInterfaceClass = USB_CLASS_VIDEO,
2351 .bInterfaceSubClass = 1,
2352 .bInterfaceProtocol = 0,
2353 .driver_info = UVC_QUIRK_RESTORE_CTRLS_ON_INIT },
2354 /* Chicony CNF7129 (Asus EEE 100HE) */
2355 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2356 | USB_DEVICE_ID_MATCH_INT_INFO,
2357 .idVendor = 0x04f2,
2358 .idProduct = 0xb071,
2359 .bInterfaceClass = USB_CLASS_VIDEO,
2360 .bInterfaceSubClass = 1,
2361 .bInterfaceProtocol = 0,
2362 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE },
2363 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2364 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2365 | USB_DEVICE_ID_MATCH_INT_INFO,
2366 .idVendor = 0x058f,
2367 .idProduct = 0x3820,
2368 .bInterfaceClass = USB_CLASS_VIDEO,
2369 .bInterfaceSubClass = 1,
2370 .bInterfaceProtocol = 0,
2371 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2372 /* Dell XPS m1530 */
2373 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2374 | USB_DEVICE_ID_MATCH_INT_INFO,
2375 .idVendor = 0x05a9,
2376 .idProduct = 0x2640,
2377 .bInterfaceClass = USB_CLASS_VIDEO,
2378 .bInterfaceSubClass = 1,
2379 .bInterfaceProtocol = 0,
2380 .driver_info = UVC_QUIRK_PROBE_DEF },
2381 /* Dell SP2008WFP Monitor */
2382 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2383 | USB_DEVICE_ID_MATCH_INT_INFO,
2384 .idVendor = 0x05a9,
2385 .idProduct = 0x2641,
2386 .bInterfaceClass = USB_CLASS_VIDEO,
2387 .bInterfaceSubClass = 1,
2388 .bInterfaceProtocol = 0,
2389 .driver_info = UVC_QUIRK_PROBE_DEF },
2390 /* Dell Alienware X51 */
2391 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2392 | USB_DEVICE_ID_MATCH_INT_INFO,
2393 .idVendor = 0x05a9,
2394 .idProduct = 0x2643,
2395 .bInterfaceClass = USB_CLASS_VIDEO,
2396 .bInterfaceSubClass = 1,
2397 .bInterfaceProtocol = 0,
2398 .driver_info = UVC_QUIRK_PROBE_DEF },
2399 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2400 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2401 | USB_DEVICE_ID_MATCH_INT_INFO,
2402 .idVendor = 0x05a9,
2403 .idProduct = 0x264a,
2404 .bInterfaceClass = USB_CLASS_VIDEO,
2405 .bInterfaceSubClass = 1,
2406 .bInterfaceProtocol = 0,
2407 .driver_info = UVC_QUIRK_PROBE_DEF },
2408 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2409 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2410 | USB_DEVICE_ID_MATCH_INT_INFO,
2411 .idVendor = 0x05a9,
2412 .idProduct = 0x7670,
2413 .bInterfaceClass = USB_CLASS_VIDEO,
2414 .bInterfaceSubClass = 1,
2415 .bInterfaceProtocol = 0,
2416 .driver_info = UVC_QUIRK_PROBE_DEF },
2417 /* Apple Built-In iSight */
2418 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2419 | USB_DEVICE_ID_MATCH_INT_INFO,
2420 .idVendor = 0x05ac,
2421 .idProduct = 0x8501,
2422 .bInterfaceClass = USB_CLASS_VIDEO,
2423 .bInterfaceSubClass = 1,
2424 .bInterfaceProtocol = 0,
2425 .driver_info = UVC_QUIRK_PROBE_MINMAX
2426 | UVC_QUIRK_BUILTIN_ISIGHT },
2427 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2428 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2429 | USB_DEVICE_ID_MATCH_INT_INFO,
2430 .idVendor = 0x05c8,
2431 .idProduct = 0x0403,
2432 .bInterfaceClass = USB_CLASS_VIDEO,
2433 .bInterfaceSubClass = 1,
2434 .bInterfaceProtocol = 0,
2435 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2436 /* Genesys Logic USB 2.0 PC Camera */
2437 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2438 | USB_DEVICE_ID_MATCH_INT_INFO,
2439 .idVendor = 0x05e3,
2440 .idProduct = 0x0505,
2441 .bInterfaceClass = USB_CLASS_VIDEO,
2442 .bInterfaceSubClass = 1,
2443 .bInterfaceProtocol = 0,
2444 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2445 /* Hercules Classic Silver */
2446 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2447 | USB_DEVICE_ID_MATCH_INT_INFO,
2448 .idVendor = 0x06f8,
2449 .idProduct = 0x300c,
2450 .bInterfaceClass = USB_CLASS_VIDEO,
2451 .bInterfaceSubClass = 1,
2452 .bInterfaceProtocol = 0,
2453 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2454 /* ViMicro Vega */
2455 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2456 | USB_DEVICE_ID_MATCH_INT_INFO,
2457 .idVendor = 0x0ac8,
2458 .idProduct = 0x332d,
2459 .bInterfaceClass = USB_CLASS_VIDEO,
2460 .bInterfaceSubClass = 1,
2461 .bInterfaceProtocol = 0,
2462 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2463 /* ViMicro - Minoru3D */
2464 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2465 | USB_DEVICE_ID_MATCH_INT_INFO,
2466 .idVendor = 0x0ac8,
2467 .idProduct = 0x3410,
2468 .bInterfaceClass = USB_CLASS_VIDEO,
2469 .bInterfaceSubClass = 1,
2470 .bInterfaceProtocol = 0,
2471 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2472 /* ViMicro Venus - Minoru3D */
2473 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2474 | USB_DEVICE_ID_MATCH_INT_INFO,
2475 .idVendor = 0x0ac8,
2476 .idProduct = 0x3420,
2477 .bInterfaceClass = USB_CLASS_VIDEO,
2478 .bInterfaceSubClass = 1,
2479 .bInterfaceProtocol = 0,
2480 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2481 /* Ophir Optronics - SPCAM 620U */
2482 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2483 | USB_DEVICE_ID_MATCH_INT_INFO,
2484 .idVendor = 0x0bd3,
2485 .idProduct = 0x0555,
2486 .bInterfaceClass = USB_CLASS_VIDEO,
2487 .bInterfaceSubClass = 1,
2488 .bInterfaceProtocol = 0,
2489 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2490 /* MT6227 */
2491 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2492 | USB_DEVICE_ID_MATCH_INT_INFO,
2493 .idVendor = 0x0e8d,
2494 .idProduct = 0x0004,
2495 .bInterfaceClass = USB_CLASS_VIDEO,
2496 .bInterfaceSubClass = 1,
2497 .bInterfaceProtocol = 0,
2498 .driver_info = UVC_QUIRK_PROBE_MINMAX
2499 | UVC_QUIRK_PROBE_DEF },
2500 /* IMC Networks (Medion Akoya) */
2501 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2502 | USB_DEVICE_ID_MATCH_INT_INFO,
2503 .idVendor = 0x13d3,
2504 .idProduct = 0x5103,
2505 .bInterfaceClass = USB_CLASS_VIDEO,
2506 .bInterfaceSubClass = 1,
2507 .bInterfaceProtocol = 0,
2508 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2509 /* JMicron USB2.0 XGA WebCam */
2510 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2511 | USB_DEVICE_ID_MATCH_INT_INFO,
2512 .idVendor = 0x152d,
2513 .idProduct = 0x0310,
2514 .bInterfaceClass = USB_CLASS_VIDEO,
2515 .bInterfaceSubClass = 1,
2516 .bInterfaceProtocol = 0,
2517 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2518 /* Syntek (HP Spartan) */
2519 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2520 | USB_DEVICE_ID_MATCH_INT_INFO,
2521 .idVendor = 0x174f,
2522 .idProduct = 0x5212,
2523 .bInterfaceClass = USB_CLASS_VIDEO,
2524 .bInterfaceSubClass = 1,
2525 .bInterfaceProtocol = 0,
2526 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2527 /* Syntek (Samsung Q310) */
2528 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2529 | USB_DEVICE_ID_MATCH_INT_INFO,
2530 .idVendor = 0x174f,
2531 .idProduct = 0x5931,
2532 .bInterfaceClass = USB_CLASS_VIDEO,
2533 .bInterfaceSubClass = 1,
2534 .bInterfaceProtocol = 0,
2535 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2536 /* Syntek (Packard Bell EasyNote MX52 */
2537 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2538 | USB_DEVICE_ID_MATCH_INT_INFO,
2539 .idVendor = 0x174f,
2540 .idProduct = 0x8a12,
2541 .bInterfaceClass = USB_CLASS_VIDEO,
2542 .bInterfaceSubClass = 1,
2543 .bInterfaceProtocol = 0,
2544 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2545 /* Syntek (Asus F9SG) */
2546 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2547 | USB_DEVICE_ID_MATCH_INT_INFO,
2548 .idVendor = 0x174f,
2549 .idProduct = 0x8a31,
2550 .bInterfaceClass = USB_CLASS_VIDEO,
2551 .bInterfaceSubClass = 1,
2552 .bInterfaceProtocol = 0,
2553 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2554 /* Syntek (Asus U3S) */
2555 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2556 | USB_DEVICE_ID_MATCH_INT_INFO,
2557 .idVendor = 0x174f,
2558 .idProduct = 0x8a33,
2559 .bInterfaceClass = USB_CLASS_VIDEO,
2560 .bInterfaceSubClass = 1,
2561 .bInterfaceProtocol = 0,
2562 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2563 /* Syntek (JAOtech Smart Terminal) */
2564 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2565 | USB_DEVICE_ID_MATCH_INT_INFO,
2566 .idVendor = 0x174f,
2567 .idProduct = 0x8a34,
2568 .bInterfaceClass = USB_CLASS_VIDEO,
2569 .bInterfaceSubClass = 1,
2570 .bInterfaceProtocol = 0,
2571 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2572 /* Miricle 307K */
2573 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2574 | USB_DEVICE_ID_MATCH_INT_INFO,
2575 .idVendor = 0x17dc,
2576 .idProduct = 0x0202,
2577 .bInterfaceClass = USB_CLASS_VIDEO,
2578 .bInterfaceSubClass = 1,
2579 .bInterfaceProtocol = 0,
2580 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2581 /* Lenovo Thinkpad SL400/SL500 */
2582 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2583 | USB_DEVICE_ID_MATCH_INT_INFO,
2584 .idVendor = 0x17ef,
2585 .idProduct = 0x480b,
2586 .bInterfaceClass = USB_CLASS_VIDEO,
2587 .bInterfaceSubClass = 1,
2588 .bInterfaceProtocol = 0,
2589 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2590 /* Aveo Technology USB 2.0 Camera */
2591 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2592 | USB_DEVICE_ID_MATCH_INT_INFO,
2593 .idVendor = 0x1871,
2594 .idProduct = 0x0306,
2595 .bInterfaceClass = USB_CLASS_VIDEO,
2596 .bInterfaceSubClass = 1,
2597 .bInterfaceProtocol = 0,
2598 .driver_info = UVC_QUIRK_PROBE_MINMAX
2599 | UVC_QUIRK_PROBE_EXTRAFIELDS },
2600 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2601 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2602 | USB_DEVICE_ID_MATCH_INT_INFO,
2603 .idVendor = 0x1871,
2604 .idProduct = 0x0516,
2605 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2606 .bInterfaceSubClass = 1,
2607 .bInterfaceProtocol = 0 },
2608 /* Ecamm Pico iMage */
2609 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2610 | USB_DEVICE_ID_MATCH_INT_INFO,
2611 .idVendor = 0x18cd,
2612 .idProduct = 0xcafe,
2613 .bInterfaceClass = USB_CLASS_VIDEO,
2614 .bInterfaceSubClass = 1,
2615 .bInterfaceProtocol = 0,
2616 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
2617 /* Manta MM-353 Plako */
2618 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2619 | USB_DEVICE_ID_MATCH_INT_INFO,
2620 .idVendor = 0x18ec,
2621 .idProduct = 0x3188,
2622 .bInterfaceClass = USB_CLASS_VIDEO,
2623 .bInterfaceSubClass = 1,
2624 .bInterfaceProtocol = 0,
2625 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2626 /* FSC WebCam V30S */
2627 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2628 | USB_DEVICE_ID_MATCH_INT_INFO,
2629 .idVendor = 0x18ec,
2630 .idProduct = 0x3288,
2631 .bInterfaceClass = USB_CLASS_VIDEO,
2632 .bInterfaceSubClass = 1,
2633 .bInterfaceProtocol = 0,
2634 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2635 /* Arkmicro unbranded */
2636 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2637 | USB_DEVICE_ID_MATCH_INT_INFO,
2638 .idVendor = 0x18ec,
2639 .idProduct = 0x3290,
2640 .bInterfaceClass = USB_CLASS_VIDEO,
2641 .bInterfaceSubClass = 1,
2642 .bInterfaceProtocol = 0,
2643 .driver_info = UVC_QUIRK_PROBE_DEF },
2644 /* The Imaging Source USB CCD cameras */
2645 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2646 | USB_DEVICE_ID_MATCH_INT_INFO,
2647 .idVendor = 0x199e,
2648 .idProduct = 0x8102,
2649 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2650 .bInterfaceSubClass = 1,
2651 .bInterfaceProtocol = 0 },
2652 /* Bodelin ProScopeHR */
2653 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2654 | USB_DEVICE_ID_MATCH_DEV_HI
2655 | USB_DEVICE_ID_MATCH_INT_INFO,
2656 .idVendor = 0x19ab,
2657 .idProduct = 0x1000,
2658 .bcdDevice_hi = 0x0126,
2659 .bInterfaceClass = USB_CLASS_VIDEO,
2660 .bInterfaceSubClass = 1,
2661 .bInterfaceProtocol = 0,
2662 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
2663 /* MSI StarCam 370i */
2664 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2665 | USB_DEVICE_ID_MATCH_INT_INFO,
2666 .idVendor = 0x1b3b,
2667 .idProduct = 0x2951,
2668 .bInterfaceClass = USB_CLASS_VIDEO,
2669 .bInterfaceSubClass = 1,
2670 .bInterfaceProtocol = 0,
2671 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2672 /* SiGma Micro USB Web Camera */
2673 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2674 | USB_DEVICE_ID_MATCH_INT_INFO,
2675 .idVendor = 0x1c4f,
2676 .idProduct = 0x3000,
2677 .bInterfaceClass = USB_CLASS_VIDEO,
2678 .bInterfaceSubClass = 1,
2679 .bInterfaceProtocol = 0,
2680 .driver_info = UVC_QUIRK_PROBE_MINMAX
2681 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
2682 /* Oculus VR Positional Tracker DK2 */
2683 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2684 | USB_DEVICE_ID_MATCH_INT_INFO,
2685 .idVendor = 0x2833,
2686 .idProduct = 0x0201,
2687 .bInterfaceClass = USB_CLASS_VIDEO,
2688 .bInterfaceSubClass = 1,
2689 .bInterfaceProtocol = 0,
2690 .driver_info = UVC_QUIRK_FORCE_Y8 },
2691 /* Generic USB Video Class */
2692 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
2693 {}
2694 };
2695
2696 MODULE_DEVICE_TABLE(usb, uvc_ids);
2697
2698 struct uvc_driver uvc_driver = {
2699 .driver = {
2700 .name = "uvcvideo",
2701 .probe = uvc_probe,
2702 .disconnect = uvc_disconnect,
2703 .suspend = uvc_suspend,
2704 .resume = uvc_resume,
2705 .reset_resume = uvc_reset_resume,
2706 .id_table = uvc_ids,
2707 .supports_autosuspend = 1,
2708 },
2709 };
2710
uvc_init(void)2711 static int __init uvc_init(void)
2712 {
2713 int ret;
2714
2715 uvc_debugfs_init();
2716
2717 ret = usb_register(&uvc_driver.driver);
2718 if (ret < 0) {
2719 uvc_debugfs_cleanup();
2720 return ret;
2721 }
2722
2723 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2724 return 0;
2725 }
2726
uvc_cleanup(void)2727 static void __exit uvc_cleanup(void)
2728 {
2729 usb_deregister(&uvc_driver.driver);
2730 uvc_debugfs_cleanup();
2731 }
2732
2733 module_init(uvc_init);
2734 module_exit(uvc_cleanup);
2735
2736 MODULE_AUTHOR(DRIVER_AUTHOR);
2737 MODULE_DESCRIPTION(DRIVER_DESC);
2738 MODULE_LICENSE("GPL");
2739 MODULE_VERSION(DRIVER_VERSION);
2740
2741