1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * uvc_driver.c -- USB Video Class driver
4 *
5 * Copyright (C) 2005-2010
6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 */
8
9 #include <linux/atomic.h>
10 #include <linux/kernel.h>
11 #include <linux/list.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/usb.h>
15 #include <linux/videodev2.h>
16 #include <linux/vmalloc.h>
17 #include <linux/wait.h>
18 #include <linux/version.h>
19 #include <asm/unaligned.h>
20
21 #include <media/v4l2-common.h>
22 #include <media/v4l2-ioctl.h>
23
24 #include "uvcvideo.h"
25
26 #define DRIVER_AUTHOR "Laurent Pinchart " \
27 "<laurent.pinchart@ideasonboard.com>"
28 #define DRIVER_DESC "USB Video Class driver"
29
30 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
31 unsigned int uvc_hw_timestamps_param;
32 unsigned int uvc_no_drop_param;
33 static unsigned int uvc_quirks_param = -1;
34 unsigned int uvc_trace_param;
35 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
36
37 /* ------------------------------------------------------------------------
38 * Video formats
39 */
40
41 static struct uvc_format_desc uvc_fmts[] = {
42 {
43 .name = "YUV 4:2:2 (YUYV)",
44 .guid = UVC_GUID_FORMAT_YUY2,
45 .fcc = V4L2_PIX_FMT_YUYV,
46 },
47 {
48 .name = "YUV 4:2:2 (YUYV)",
49 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
50 .fcc = V4L2_PIX_FMT_YUYV,
51 },
52 {
53 .name = "YUV 4:2:0 (NV12)",
54 .guid = UVC_GUID_FORMAT_NV12,
55 .fcc = V4L2_PIX_FMT_NV12,
56 },
57 {
58 .name = "MJPEG",
59 .guid = UVC_GUID_FORMAT_MJPEG,
60 .fcc = V4L2_PIX_FMT_MJPEG,
61 },
62 {
63 .name = "YVU 4:2:0 (YV12)",
64 .guid = UVC_GUID_FORMAT_YV12,
65 .fcc = V4L2_PIX_FMT_YVU420,
66 },
67 {
68 .name = "YUV 4:2:0 (I420)",
69 .guid = UVC_GUID_FORMAT_I420,
70 .fcc = V4L2_PIX_FMT_YUV420,
71 },
72 {
73 .name = "YUV 4:2:0 (M420)",
74 .guid = UVC_GUID_FORMAT_M420,
75 .fcc = V4L2_PIX_FMT_M420,
76 },
77 {
78 .name = "YUV 4:2:2 (UYVY)",
79 .guid = UVC_GUID_FORMAT_UYVY,
80 .fcc = V4L2_PIX_FMT_UYVY,
81 },
82 {
83 .name = "Greyscale 8-bit (Y800)",
84 .guid = UVC_GUID_FORMAT_Y800,
85 .fcc = V4L2_PIX_FMT_GREY,
86 },
87 {
88 .name = "Greyscale 8-bit (Y8 )",
89 .guid = UVC_GUID_FORMAT_Y8,
90 .fcc = V4L2_PIX_FMT_GREY,
91 },
92 {
93 .name = "Greyscale 8-bit (D3DFMT_L8)",
94 .guid = UVC_GUID_FORMAT_D3DFMT_L8,
95 .fcc = V4L2_PIX_FMT_GREY,
96 },
97 {
98 .name = "IR 8-bit (L8_IR)",
99 .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR,
100 .fcc = V4L2_PIX_FMT_GREY,
101 },
102 {
103 .name = "Greyscale 10-bit (Y10 )",
104 .guid = UVC_GUID_FORMAT_Y10,
105 .fcc = V4L2_PIX_FMT_Y10,
106 },
107 {
108 .name = "Greyscale 12-bit (Y12 )",
109 .guid = UVC_GUID_FORMAT_Y12,
110 .fcc = V4L2_PIX_FMT_Y12,
111 },
112 {
113 .name = "Greyscale 16-bit (Y16 )",
114 .guid = UVC_GUID_FORMAT_Y16,
115 .fcc = V4L2_PIX_FMT_Y16,
116 },
117 {
118 .name = "BGGR Bayer (BY8 )",
119 .guid = UVC_GUID_FORMAT_BY8,
120 .fcc = V4L2_PIX_FMT_SBGGR8,
121 },
122 {
123 .name = "BGGR Bayer (BA81)",
124 .guid = UVC_GUID_FORMAT_BA81,
125 .fcc = V4L2_PIX_FMT_SBGGR8,
126 },
127 {
128 .name = "GBRG Bayer (GBRG)",
129 .guid = UVC_GUID_FORMAT_GBRG,
130 .fcc = V4L2_PIX_FMT_SGBRG8,
131 },
132 {
133 .name = "GRBG Bayer (GRBG)",
134 .guid = UVC_GUID_FORMAT_GRBG,
135 .fcc = V4L2_PIX_FMT_SGRBG8,
136 },
137 {
138 .name = "RGGB Bayer (RGGB)",
139 .guid = UVC_GUID_FORMAT_RGGB,
140 .fcc = V4L2_PIX_FMT_SRGGB8,
141 },
142 {
143 .name = "RGB565",
144 .guid = UVC_GUID_FORMAT_RGBP,
145 .fcc = V4L2_PIX_FMT_RGB565,
146 },
147 {
148 .name = "BGR 8:8:8 (BGR3)",
149 .guid = UVC_GUID_FORMAT_BGR3,
150 .fcc = V4L2_PIX_FMT_BGR24,
151 },
152 {
153 .name = "H.264",
154 .guid = UVC_GUID_FORMAT_H264,
155 .fcc = V4L2_PIX_FMT_H264,
156 },
157 {
158 .name = "Greyscale 8 L/R (Y8I)",
159 .guid = UVC_GUID_FORMAT_Y8I,
160 .fcc = V4L2_PIX_FMT_Y8I,
161 },
162 {
163 .name = "Greyscale 12 L/R (Y12I)",
164 .guid = UVC_GUID_FORMAT_Y12I,
165 .fcc = V4L2_PIX_FMT_Y12I,
166 },
167 {
168 .name = "Depth data 16-bit (Z16)",
169 .guid = UVC_GUID_FORMAT_Z16,
170 .fcc = V4L2_PIX_FMT_Z16,
171 },
172 {
173 .name = "Bayer 10-bit (SRGGB10P)",
174 .guid = UVC_GUID_FORMAT_RW10,
175 .fcc = V4L2_PIX_FMT_SRGGB10P,
176 },
177 {
178 .name = "Bayer 16-bit (SBGGR16)",
179 .guid = UVC_GUID_FORMAT_BG16,
180 .fcc = V4L2_PIX_FMT_SBGGR16,
181 },
182 {
183 .name = "Bayer 16-bit (SGBRG16)",
184 .guid = UVC_GUID_FORMAT_GB16,
185 .fcc = V4L2_PIX_FMT_SGBRG16,
186 },
187 {
188 .name = "Bayer 16-bit (SRGGB16)",
189 .guid = UVC_GUID_FORMAT_RG16,
190 .fcc = V4L2_PIX_FMT_SRGGB16,
191 },
192 {
193 .name = "Bayer 16-bit (SGRBG16)",
194 .guid = UVC_GUID_FORMAT_GR16,
195 .fcc = V4L2_PIX_FMT_SGRBG16,
196 },
197 {
198 .name = "Depth data 16-bit (Z16)",
199 .guid = UVC_GUID_FORMAT_INVZ,
200 .fcc = V4L2_PIX_FMT_Z16,
201 },
202 {
203 .name = "Greyscale 10-bit (Y10 )",
204 .guid = UVC_GUID_FORMAT_INVI,
205 .fcc = V4L2_PIX_FMT_Y10,
206 },
207 {
208 .name = "IR:Depth 26-bit (INZI)",
209 .guid = UVC_GUID_FORMAT_INZI,
210 .fcc = V4L2_PIX_FMT_INZI,
211 },
212 {
213 .name = "4-bit Depth Confidence (Packed)",
214 .guid = UVC_GUID_FORMAT_CNF4,
215 .fcc = V4L2_PIX_FMT_CNF4,
216 },
217 {
218 .name = "HEVC",
219 .guid = UVC_GUID_FORMAT_HEVC,
220 .fcc = V4L2_PIX_FMT_HEVC,
221 },
222 };
223
224 /* ------------------------------------------------------------------------
225 * Utility functions
226 */
227
uvc_find_endpoint(struct usb_host_interface * alts,u8 epaddr)228 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
229 u8 epaddr)
230 {
231 struct usb_host_endpoint *ep;
232 unsigned int i;
233
234 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
235 ep = &alts->endpoint[i];
236 if (ep->desc.bEndpointAddress == epaddr)
237 return ep;
238 }
239
240 return NULL;
241 }
242
uvc_format_by_guid(const u8 guid[16])243 static struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16])
244 {
245 unsigned int len = ARRAY_SIZE(uvc_fmts);
246 unsigned int i;
247
248 for (i = 0; i < len; ++i) {
249 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
250 return &uvc_fmts[i];
251 }
252
253 return NULL;
254 }
255
uvc_colorspace(const u8 primaries)256 static enum v4l2_colorspace uvc_colorspace(const u8 primaries)
257 {
258 static const enum v4l2_colorspace colorprimaries[] = {
259 V4L2_COLORSPACE_DEFAULT, /* Unspecified */
260 V4L2_COLORSPACE_SRGB,
261 V4L2_COLORSPACE_470_SYSTEM_M,
262 V4L2_COLORSPACE_470_SYSTEM_BG,
263 V4L2_COLORSPACE_SMPTE170M,
264 V4L2_COLORSPACE_SMPTE240M,
265 };
266
267 if (primaries < ARRAY_SIZE(colorprimaries))
268 return colorprimaries[primaries];
269
270 return V4L2_COLORSPACE_DEFAULT; /* Reserved */
271 }
272
uvc_xfer_func(const u8 transfer_characteristics)273 static enum v4l2_xfer_func uvc_xfer_func(const u8 transfer_characteristics)
274 {
275 /*
276 * V4L2 does not currently have definitions for all possible values of
277 * UVC transfer characteristics. If v4l2_xfer_func is extended with new
278 * values, the mapping below should be updated.
279 *
280 * Substitutions are taken from the mapping given for
281 * V4L2_XFER_FUNC_DEFAULT documented in videodev2.h.
282 */
283 static const enum v4l2_xfer_func xfer_funcs[] = {
284 V4L2_XFER_FUNC_DEFAULT, /* Unspecified */
285 V4L2_XFER_FUNC_709,
286 V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 M */
287 V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 B, G */
288 V4L2_XFER_FUNC_709, /* Substitution for SMPTE 170M */
289 V4L2_XFER_FUNC_SMPTE240M,
290 V4L2_XFER_FUNC_NONE,
291 V4L2_XFER_FUNC_SRGB,
292 };
293
294 if (transfer_characteristics < ARRAY_SIZE(xfer_funcs))
295 return xfer_funcs[transfer_characteristics];
296
297 return V4L2_XFER_FUNC_DEFAULT; /* Reserved */
298 }
299
uvc_ycbcr_enc(const u8 matrix_coefficients)300 static enum v4l2_ycbcr_encoding uvc_ycbcr_enc(const u8 matrix_coefficients)
301 {
302 /*
303 * V4L2 does not currently have definitions for all possible values of
304 * UVC matrix coefficients. If v4l2_ycbcr_encoding is extended with new
305 * values, the mapping below should be updated.
306 *
307 * Substitutions are taken from the mapping given for
308 * V4L2_YCBCR_ENC_DEFAULT documented in videodev2.h.
309 *
310 * FCC is assumed to be close enough to 601.
311 */
312 static const enum v4l2_ycbcr_encoding ycbcr_encs[] = {
313 V4L2_YCBCR_ENC_DEFAULT, /* Unspecified */
314 V4L2_YCBCR_ENC_709,
315 V4L2_YCBCR_ENC_601, /* Substitution for FCC */
316 V4L2_YCBCR_ENC_601, /* Substitution for BT.470-2 B, G */
317 V4L2_YCBCR_ENC_601,
318 V4L2_YCBCR_ENC_SMPTE240M,
319 };
320
321 if (matrix_coefficients < ARRAY_SIZE(ycbcr_encs))
322 return ycbcr_encs[matrix_coefficients];
323
324 return V4L2_YCBCR_ENC_DEFAULT; /* Reserved */
325 }
326
327 /* Simplify a fraction using a simple continued fraction decomposition. The
328 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
329 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
330 * arbitrary parameters to remove non-significative terms from the simple
331 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
332 * respectively seems to give nice results.
333 */
uvc_simplify_fraction(u32 * numerator,u32 * denominator,unsigned int n_terms,unsigned int threshold)334 void uvc_simplify_fraction(u32 *numerator, u32 *denominator,
335 unsigned int n_terms, unsigned int threshold)
336 {
337 u32 *an;
338 u32 x, y, r;
339 unsigned int i, n;
340
341 an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL);
342 if (an == NULL)
343 return;
344
345 /* Convert the fraction to a simple continued fraction. See
346 * https://mathforum.org/dr.math/faq/faq.fractions.html
347 * Stop if the current term is bigger than or equal to the given
348 * threshold.
349 */
350 x = *numerator;
351 y = *denominator;
352
353 for (n = 0; n < n_terms && y != 0; ++n) {
354 an[n] = x / y;
355 if (an[n] >= threshold) {
356 if (n < 2)
357 n++;
358 break;
359 }
360
361 r = x - an[n] * y;
362 x = y;
363 y = r;
364 }
365
366 /* Expand the simple continued fraction back to an integer fraction. */
367 x = 0;
368 y = 1;
369
370 for (i = n; i > 0; --i) {
371 r = y;
372 y = an[i-1] * y + x;
373 x = r;
374 }
375
376 *numerator = y;
377 *denominator = x;
378 kfree(an);
379 }
380
381 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
382 * to compute numerator / denominator * 10000000 using 32 bit fixed point
383 * arithmetic only.
384 */
uvc_fraction_to_interval(u32 numerator,u32 denominator)385 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator)
386 {
387 u32 multiplier;
388
389 /* Saturate the result if the operation would overflow. */
390 if (denominator == 0 ||
391 numerator/denominator >= ((u32)-1)/10000000)
392 return (u32)-1;
393
394 /* Divide both the denominator and the multiplier by two until
395 * numerator * multiplier doesn't overflow. If anyone knows a better
396 * algorithm please let me know.
397 */
398 multiplier = 10000000;
399 while (numerator > ((u32)-1)/multiplier) {
400 multiplier /= 2;
401 denominator /= 2;
402 }
403
404 return denominator ? numerator * multiplier / denominator : 0;
405 }
406
407 /* ------------------------------------------------------------------------
408 * Terminal and unit management
409 */
410
uvc_entity_by_id(struct uvc_device * dev,int id)411 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
412 {
413 struct uvc_entity *entity;
414
415 list_for_each_entry(entity, &dev->entities, list) {
416 if (entity->id == id)
417 return entity;
418 }
419
420 return NULL;
421 }
422
uvc_entity_by_reference(struct uvc_device * dev,int id,struct uvc_entity * entity)423 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
424 int id, struct uvc_entity *entity)
425 {
426 unsigned int i;
427
428 if (entity == NULL)
429 entity = list_entry(&dev->entities, struct uvc_entity, list);
430
431 list_for_each_entry_continue(entity, &dev->entities, list) {
432 for (i = 0; i < entity->bNrInPins; ++i)
433 if (entity->baSourceID[i] == id)
434 return entity;
435 }
436
437 return NULL;
438 }
439
uvc_stream_by_id(struct uvc_device * dev,int id)440 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
441 {
442 struct uvc_streaming *stream;
443
444 list_for_each_entry(stream, &dev->streams, list) {
445 if (stream->header.bTerminalLink == id)
446 return stream;
447 }
448
449 return NULL;
450 }
451
452 /* ------------------------------------------------------------------------
453 * Streaming Object Management
454 */
455
uvc_stream_delete(struct uvc_streaming * stream)456 static void uvc_stream_delete(struct uvc_streaming *stream)
457 {
458 if (stream->async_wq)
459 destroy_workqueue(stream->async_wq);
460
461 mutex_destroy(&stream->mutex);
462
463 usb_put_intf(stream->intf);
464
465 kfree(stream->format);
466 kfree(stream->header.bmaControls);
467 kfree(stream);
468 }
469
uvc_stream_new(struct uvc_device * dev,struct usb_interface * intf)470 static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev,
471 struct usb_interface *intf)
472 {
473 struct uvc_streaming *stream;
474
475 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
476 if (stream == NULL)
477 return NULL;
478
479 mutex_init(&stream->mutex);
480
481 stream->dev = dev;
482 stream->intf = usb_get_intf(intf);
483 stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
484
485 /* Allocate a stream specific work queue for asynchronous tasks. */
486 stream->async_wq = alloc_workqueue("uvcvideo", WQ_UNBOUND | WQ_HIGHPRI,
487 0);
488 if (!stream->async_wq) {
489 uvc_stream_delete(stream);
490 return NULL;
491 }
492
493 return stream;
494 }
495
496 /* ------------------------------------------------------------------------
497 * Descriptors parsing
498 */
499
uvc_parse_format(struct uvc_device * dev,struct uvc_streaming * streaming,struct uvc_format * format,u32 ** intervals,unsigned char * buffer,int buflen)500 static int uvc_parse_format(struct uvc_device *dev,
501 struct uvc_streaming *streaming, struct uvc_format *format,
502 u32 **intervals, unsigned char *buffer, int buflen)
503 {
504 struct usb_interface *intf = streaming->intf;
505 struct usb_host_interface *alts = intf->cur_altsetting;
506 struct uvc_format_desc *fmtdesc;
507 struct uvc_frame *frame;
508 const unsigned char *start = buffer;
509 unsigned int width_multiplier = 1;
510 unsigned int interval;
511 unsigned int i, n;
512 u8 ftype;
513
514 format->type = buffer[2];
515 format->index = buffer[3];
516
517 switch (buffer[2]) {
518 case UVC_VS_FORMAT_UNCOMPRESSED:
519 case UVC_VS_FORMAT_FRAME_BASED:
520 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
521 if (buflen < n) {
522 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
523 "interface %d FORMAT error\n",
524 dev->udev->devnum,
525 alts->desc.bInterfaceNumber);
526 return -EINVAL;
527 }
528
529 /* Find the format descriptor from its GUID. */
530 fmtdesc = uvc_format_by_guid(&buffer[5]);
531
532 if (fmtdesc != NULL) {
533 strscpy(format->name, fmtdesc->name,
534 sizeof(format->name));
535 format->fcc = fmtdesc->fcc;
536 } else {
537 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
538 &buffer[5]);
539 snprintf(format->name, sizeof(format->name), "%pUl\n",
540 &buffer[5]);
541 format->fcc = 0;
542 }
543
544 format->bpp = buffer[21];
545
546 /* Some devices report a format that doesn't match what they
547 * really send.
548 */
549 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
550 if (format->fcc == V4L2_PIX_FMT_YUYV) {
551 strscpy(format->name, "Greyscale 8-bit (Y8 )",
552 sizeof(format->name));
553 format->fcc = V4L2_PIX_FMT_GREY;
554 format->bpp = 8;
555 width_multiplier = 2;
556 }
557 }
558
559 /* Some devices report bpp that doesn't match the format. */
560 if (dev->quirks & UVC_QUIRK_FORCE_BPP) {
561 const struct v4l2_format_info *info =
562 v4l2_format_info(format->fcc);
563
564 if (info) {
565 unsigned int div = info->hdiv * info->vdiv;
566
567 n = info->bpp[0] * div;
568 for (i = 1; i < info->comp_planes; i++)
569 n += info->bpp[i];
570
571 format->bpp = DIV_ROUND_UP(8 * n, div);
572 }
573 }
574
575 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
576 ftype = UVC_VS_FRAME_UNCOMPRESSED;
577 } else {
578 ftype = UVC_VS_FRAME_FRAME_BASED;
579 if (buffer[27])
580 format->flags = UVC_FMT_FLAG_COMPRESSED;
581 }
582 break;
583
584 case UVC_VS_FORMAT_MJPEG:
585 if (buflen < 11) {
586 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
587 "interface %d FORMAT error\n",
588 dev->udev->devnum,
589 alts->desc.bInterfaceNumber);
590 return -EINVAL;
591 }
592
593 strscpy(format->name, "MJPEG", sizeof(format->name));
594 format->fcc = V4L2_PIX_FMT_MJPEG;
595 format->flags = UVC_FMT_FLAG_COMPRESSED;
596 format->bpp = 0;
597 ftype = UVC_VS_FRAME_MJPEG;
598 break;
599
600 case UVC_VS_FORMAT_DV:
601 if (buflen < 9) {
602 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
603 "interface %d FORMAT error\n",
604 dev->udev->devnum,
605 alts->desc.bInterfaceNumber);
606 return -EINVAL;
607 }
608
609 switch (buffer[8] & 0x7f) {
610 case 0:
611 strscpy(format->name, "SD-DV", sizeof(format->name));
612 break;
613 case 1:
614 strscpy(format->name, "SDL-DV", sizeof(format->name));
615 break;
616 case 2:
617 strscpy(format->name, "HD-DV", sizeof(format->name));
618 break;
619 default:
620 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
621 "interface %d: unknown DV format %u\n",
622 dev->udev->devnum,
623 alts->desc.bInterfaceNumber, buffer[8]);
624 return -EINVAL;
625 }
626
627 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
628 sizeof(format->name));
629
630 format->fcc = V4L2_PIX_FMT_DV;
631 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
632 format->bpp = 0;
633 ftype = 0;
634
635 /* Create a dummy frame descriptor. */
636 frame = &format->frame[0];
637 memset(&format->frame[0], 0, sizeof(format->frame[0]));
638 frame->bFrameIntervalType = 1;
639 frame->dwDefaultFrameInterval = 1;
640 frame->dwFrameInterval = *intervals;
641 *(*intervals)++ = 1;
642 format->nframes = 1;
643 break;
644
645 case UVC_VS_FORMAT_MPEG2TS:
646 case UVC_VS_FORMAT_STREAM_BASED:
647 /* Not supported yet. */
648 default:
649 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
650 "interface %d unsupported format %u\n",
651 dev->udev->devnum, alts->desc.bInterfaceNumber,
652 buffer[2]);
653 return -EINVAL;
654 }
655
656 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
657
658 buflen -= buffer[0];
659 buffer += buffer[0];
660
661 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
662 * based formats have frame descriptors.
663 */
664 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
665 buffer[2] == ftype) {
666 frame = &format->frame[format->nframes];
667 if (ftype != UVC_VS_FRAME_FRAME_BASED)
668 n = buflen > 25 ? buffer[25] : 0;
669 else
670 n = buflen > 21 ? buffer[21] : 0;
671
672 n = n ? n : 3;
673
674 if (buflen < 26 + 4*n) {
675 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
676 "interface %d FRAME error\n", dev->udev->devnum,
677 alts->desc.bInterfaceNumber);
678 return -EINVAL;
679 }
680
681 frame->bFrameIndex = buffer[3];
682 frame->bmCapabilities = buffer[4];
683 frame->wWidth = get_unaligned_le16(&buffer[5])
684 * width_multiplier;
685 frame->wHeight = get_unaligned_le16(&buffer[7]);
686 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
687 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
688 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
689 frame->dwMaxVideoFrameBufferSize =
690 get_unaligned_le32(&buffer[17]);
691 frame->dwDefaultFrameInterval =
692 get_unaligned_le32(&buffer[21]);
693 frame->bFrameIntervalType = buffer[25];
694 } else {
695 frame->dwMaxVideoFrameBufferSize = 0;
696 frame->dwDefaultFrameInterval =
697 get_unaligned_le32(&buffer[17]);
698 frame->bFrameIntervalType = buffer[21];
699 }
700 frame->dwFrameInterval = *intervals;
701
702 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
703 * completely. Observed behaviours range from setting the
704 * value to 1.1x the actual frame size to hardwiring the
705 * 16 low bits to 0. This results in a higher than necessary
706 * memory usage as well as a wrong image size information. For
707 * uncompressed formats this can be fixed by computing the
708 * value from the frame size.
709 */
710 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
711 frame->dwMaxVideoFrameBufferSize = format->bpp
712 * frame->wWidth * frame->wHeight / 8;
713
714 /* Some bogus devices report dwMinFrameInterval equal to
715 * dwMaxFrameInterval and have dwFrameIntervalStep set to
716 * zero. Setting all null intervals to 1 fixes the problem and
717 * some other divisions by zero that could happen.
718 */
719 for (i = 0; i < n; ++i) {
720 interval = get_unaligned_le32(&buffer[26+4*i]);
721 *(*intervals)++ = interval ? interval : 1;
722 }
723
724 /* Make sure that the default frame interval stays between
725 * the boundaries.
726 */
727 n -= frame->bFrameIntervalType ? 1 : 2;
728 frame->dwDefaultFrameInterval =
729 min(frame->dwFrameInterval[n],
730 max(frame->dwFrameInterval[0],
731 frame->dwDefaultFrameInterval));
732
733 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
734 frame->bFrameIntervalType = 1;
735 frame->dwFrameInterval[0] =
736 frame->dwDefaultFrameInterval;
737 }
738
739 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
740 frame->wWidth, frame->wHeight,
741 10000000/frame->dwDefaultFrameInterval,
742 (100000000/frame->dwDefaultFrameInterval)%10);
743
744 format->nframes++;
745 buflen -= buffer[0];
746 buffer += buffer[0];
747 }
748
749 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
750 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
751 buflen -= buffer[0];
752 buffer += buffer[0];
753 }
754
755 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
756 buffer[2] == UVC_VS_COLORFORMAT) {
757 if (buflen < 6) {
758 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
759 "interface %d COLORFORMAT error\n",
760 dev->udev->devnum,
761 alts->desc.bInterfaceNumber);
762 return -EINVAL;
763 }
764
765 format->colorspace = uvc_colorspace(buffer[3]);
766 format->xfer_func = uvc_xfer_func(buffer[4]);
767 format->ycbcr_enc = uvc_ycbcr_enc(buffer[5]);
768
769 buflen -= buffer[0];
770 buffer += buffer[0];
771 }
772
773 return buffer - start;
774 }
775
uvc_parse_streaming(struct uvc_device * dev,struct usb_interface * intf)776 static int uvc_parse_streaming(struct uvc_device *dev,
777 struct usb_interface *intf)
778 {
779 struct uvc_streaming *streaming = NULL;
780 struct uvc_format *format;
781 struct uvc_frame *frame;
782 struct usb_host_interface *alts = &intf->altsetting[0];
783 unsigned char *_buffer, *buffer = alts->extra;
784 int _buflen, buflen = alts->extralen;
785 unsigned int nformats = 0, nframes = 0, nintervals = 0;
786 unsigned int size, i, n, p;
787 u32 *interval;
788 u16 psize;
789 int ret = -EINVAL;
790
791 if (intf->cur_altsetting->desc.bInterfaceSubClass
792 != UVC_SC_VIDEOSTREAMING) {
793 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
794 "video streaming interface\n", dev->udev->devnum,
795 intf->altsetting[0].desc.bInterfaceNumber);
796 return -EINVAL;
797 }
798
799 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
800 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
801 "claimed\n", dev->udev->devnum,
802 intf->altsetting[0].desc.bInterfaceNumber);
803 return -EINVAL;
804 }
805
806 streaming = uvc_stream_new(dev, intf);
807 if (streaming == NULL) {
808 usb_driver_release_interface(&uvc_driver.driver, intf);
809 return -ENOMEM;
810 }
811
812 /* The Pico iMage webcam has its class-specific interface descriptors
813 * after the endpoint descriptors.
814 */
815 if (buflen == 0) {
816 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
817 struct usb_host_endpoint *ep = &alts->endpoint[i];
818
819 if (ep->extralen == 0)
820 continue;
821
822 if (ep->extralen > 2 &&
823 ep->extra[1] == USB_DT_CS_INTERFACE) {
824 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
825 "from endpoint %u.\n", i);
826 buffer = alts->endpoint[i].extra;
827 buflen = alts->endpoint[i].extralen;
828 break;
829 }
830 }
831 }
832
833 /* Skip the standard interface descriptors. */
834 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
835 buflen -= buffer[0];
836 buffer += buffer[0];
837 }
838
839 if (buflen <= 2) {
840 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
841 "interface descriptors found.\n");
842 goto error;
843 }
844
845 /* Parse the header descriptor. */
846 switch (buffer[2]) {
847 case UVC_VS_OUTPUT_HEADER:
848 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
849 size = 9;
850 break;
851
852 case UVC_VS_INPUT_HEADER:
853 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
854 size = 13;
855 break;
856
857 default:
858 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
859 "%d HEADER descriptor not found.\n", dev->udev->devnum,
860 alts->desc.bInterfaceNumber);
861 goto error;
862 }
863
864 p = buflen >= 4 ? buffer[3] : 0;
865 n = buflen >= size ? buffer[size-1] : 0;
866
867 if (buflen < size + p*n) {
868 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
869 "interface %d HEADER descriptor is invalid.\n",
870 dev->udev->devnum, alts->desc.bInterfaceNumber);
871 goto error;
872 }
873
874 streaming->header.bNumFormats = p;
875 streaming->header.bEndpointAddress = buffer[6];
876 if (buffer[2] == UVC_VS_INPUT_HEADER) {
877 streaming->header.bmInfo = buffer[7];
878 streaming->header.bTerminalLink = buffer[8];
879 streaming->header.bStillCaptureMethod = buffer[9];
880 streaming->header.bTriggerSupport = buffer[10];
881 streaming->header.bTriggerUsage = buffer[11];
882 } else {
883 streaming->header.bTerminalLink = buffer[7];
884 }
885 streaming->header.bControlSize = n;
886
887 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
888 GFP_KERNEL);
889 if (streaming->header.bmaControls == NULL) {
890 ret = -ENOMEM;
891 goto error;
892 }
893
894 buflen -= buffer[0];
895 buffer += buffer[0];
896
897 _buffer = buffer;
898 _buflen = buflen;
899
900 /* Count the format and frame descriptors. */
901 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
902 switch (_buffer[2]) {
903 case UVC_VS_FORMAT_UNCOMPRESSED:
904 case UVC_VS_FORMAT_MJPEG:
905 case UVC_VS_FORMAT_FRAME_BASED:
906 nformats++;
907 break;
908
909 case UVC_VS_FORMAT_DV:
910 /* DV format has no frame descriptor. We will create a
911 * dummy frame descriptor with a dummy frame interval.
912 */
913 nformats++;
914 nframes++;
915 nintervals++;
916 break;
917
918 case UVC_VS_FORMAT_MPEG2TS:
919 case UVC_VS_FORMAT_STREAM_BASED:
920 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
921 "interface %d FORMAT %u is not supported.\n",
922 dev->udev->devnum,
923 alts->desc.bInterfaceNumber, _buffer[2]);
924 break;
925
926 case UVC_VS_FRAME_UNCOMPRESSED:
927 case UVC_VS_FRAME_MJPEG:
928 nframes++;
929 if (_buflen > 25)
930 nintervals += _buffer[25] ? _buffer[25] : 3;
931 break;
932
933 case UVC_VS_FRAME_FRAME_BASED:
934 nframes++;
935 if (_buflen > 21)
936 nintervals += _buffer[21] ? _buffer[21] : 3;
937 break;
938 }
939
940 _buflen -= _buffer[0];
941 _buffer += _buffer[0];
942 }
943
944 if (nformats == 0) {
945 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
946 "%d has no supported formats defined.\n",
947 dev->udev->devnum, alts->desc.bInterfaceNumber);
948 goto error;
949 }
950
951 size = nformats * sizeof(*format) + nframes * sizeof(*frame)
952 + nintervals * sizeof(*interval);
953 format = kzalloc(size, GFP_KERNEL);
954 if (format == NULL) {
955 ret = -ENOMEM;
956 goto error;
957 }
958
959 frame = (struct uvc_frame *)&format[nformats];
960 interval = (u32 *)&frame[nframes];
961
962 streaming->format = format;
963 streaming->nformats = nformats;
964
965 /* Parse the format descriptors. */
966 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
967 switch (buffer[2]) {
968 case UVC_VS_FORMAT_UNCOMPRESSED:
969 case UVC_VS_FORMAT_MJPEG:
970 case UVC_VS_FORMAT_DV:
971 case UVC_VS_FORMAT_FRAME_BASED:
972 format->frame = frame;
973 ret = uvc_parse_format(dev, streaming, format,
974 &interval, buffer, buflen);
975 if (ret < 0)
976 goto error;
977
978 frame += format->nframes;
979 format++;
980
981 buflen -= ret;
982 buffer += ret;
983 continue;
984
985 default:
986 break;
987 }
988
989 buflen -= buffer[0];
990 buffer += buffer[0];
991 }
992
993 if (buflen)
994 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
995 "%d has %u bytes of trailing descriptor garbage.\n",
996 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
997
998 /* Parse the alternate settings to find the maximum bandwidth. */
999 for (i = 0; i < intf->num_altsetting; ++i) {
1000 struct usb_host_endpoint *ep;
1001 alts = &intf->altsetting[i];
1002 ep = uvc_find_endpoint(alts,
1003 streaming->header.bEndpointAddress);
1004 if (ep == NULL)
1005 continue;
1006
1007 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
1008 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
1009 if (psize > streaming->maxpsize)
1010 streaming->maxpsize = psize;
1011 }
1012
1013 list_add_tail(&streaming->list, &dev->streams);
1014 return 0;
1015
1016 error:
1017 usb_driver_release_interface(&uvc_driver.driver, intf);
1018 uvc_stream_delete(streaming);
1019 return ret;
1020 }
1021
uvc_alloc_entity(u16 type,u8 id,unsigned int num_pads,unsigned int extra_size)1022 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
1023 unsigned int num_pads, unsigned int extra_size)
1024 {
1025 struct uvc_entity *entity;
1026 unsigned int num_inputs;
1027 unsigned int size;
1028 unsigned int i;
1029
1030 extra_size = roundup(extra_size, sizeof(*entity->pads));
1031 if (num_pads)
1032 num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
1033 else
1034 num_inputs = 0;
1035 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
1036 + num_inputs;
1037 entity = kzalloc(size, GFP_KERNEL);
1038 if (entity == NULL)
1039 return NULL;
1040
1041 entity->id = id;
1042 entity->type = type;
1043
1044 entity->num_links = 0;
1045 entity->num_pads = num_pads;
1046 entity->pads = ((void *)(entity + 1)) + extra_size;
1047
1048 for (i = 0; i < num_inputs; ++i)
1049 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
1050 if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
1051 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
1052
1053 entity->bNrInPins = num_inputs;
1054 entity->baSourceID = (u8 *)(&entity->pads[num_pads]);
1055
1056 return entity;
1057 }
1058
1059 /* Parse vendor-specific extensions. */
uvc_parse_vendor_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)1060 static int uvc_parse_vendor_control(struct uvc_device *dev,
1061 const unsigned char *buffer, int buflen)
1062 {
1063 struct usb_device *udev = dev->udev;
1064 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1065 struct uvc_entity *unit;
1066 unsigned int n, p;
1067 int handled = 0;
1068
1069 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
1070 case 0x046d: /* Logitech */
1071 if (buffer[1] != 0x41 || buffer[2] != 0x01)
1072 break;
1073
1074 /* Logitech implements several vendor specific functions
1075 * through vendor specific extension units (LXU).
1076 *
1077 * The LXU descriptors are similar to XU descriptors
1078 * (see "USB Device Video Class for Video Devices", section
1079 * 3.7.2.6 "Extension Unit Descriptor") with the following
1080 * differences:
1081 *
1082 * ----------------------------------------------------------
1083 * 0 bLength 1 Number
1084 * Size of this descriptor, in bytes: 24+p+n*2
1085 * ----------------------------------------------------------
1086 * 23+p+n bmControlsType N Bitmap
1087 * Individual bits in the set are defined:
1088 * 0: Absolute
1089 * 1: Relative
1090 *
1091 * This bitset is mapped exactly the same as bmControls.
1092 * ----------------------------------------------------------
1093 * 23+p+n*2 bReserved 1 Boolean
1094 * ----------------------------------------------------------
1095 * 24+p+n*2 iExtension 1 Index
1096 * Index of a string descriptor that describes this
1097 * extension unit.
1098 * ----------------------------------------------------------
1099 */
1100 p = buflen >= 22 ? buffer[21] : 0;
1101 n = buflen >= 25 + p ? buffer[22+p] : 0;
1102
1103 if (buflen < 25 + p + 2*n) {
1104 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1105 "interface %d EXTENSION_UNIT error\n",
1106 udev->devnum, alts->desc.bInterfaceNumber);
1107 break;
1108 }
1109
1110 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
1111 p + 1, 2*n);
1112 if (unit == NULL)
1113 return -ENOMEM;
1114
1115 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1116 unit->extension.bNumControls = buffer[20];
1117 memcpy(unit->baSourceID, &buffer[22], p);
1118 unit->extension.bControlSize = buffer[22+p];
1119 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1120 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit)
1121 + n;
1122 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
1123
1124 if (buffer[24+p+2*n] != 0)
1125 usb_string(udev, buffer[24+p+2*n], unit->name,
1126 sizeof(unit->name));
1127 else
1128 sprintf(unit->name, "Extension %u", buffer[3]);
1129
1130 list_add_tail(&unit->list, &dev->entities);
1131 handled = 1;
1132 break;
1133 }
1134
1135 return handled;
1136 }
1137
uvc_parse_standard_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)1138 static int uvc_parse_standard_control(struct uvc_device *dev,
1139 const unsigned char *buffer, int buflen)
1140 {
1141 struct usb_device *udev = dev->udev;
1142 struct uvc_entity *unit, *term;
1143 struct usb_interface *intf;
1144 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1145 unsigned int i, n, p, len;
1146 u16 type;
1147
1148 switch (buffer[2]) {
1149 case UVC_VC_HEADER:
1150 n = buflen >= 12 ? buffer[11] : 0;
1151
1152 if (buflen < 12 + n) {
1153 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1154 "interface %d HEADER error\n", udev->devnum,
1155 alts->desc.bInterfaceNumber);
1156 return -EINVAL;
1157 }
1158
1159 dev->uvc_version = get_unaligned_le16(&buffer[3]);
1160 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
1161
1162 /* Parse all USB Video Streaming interfaces. */
1163 for (i = 0; i < n; ++i) {
1164 intf = usb_ifnum_to_if(udev, buffer[12+i]);
1165 if (intf == NULL) {
1166 uvc_trace(UVC_TRACE_DESCR, "device %d "
1167 "interface %d doesn't exists\n",
1168 udev->devnum, i);
1169 continue;
1170 }
1171
1172 uvc_parse_streaming(dev, intf);
1173 }
1174 break;
1175
1176 case UVC_VC_INPUT_TERMINAL:
1177 if (buflen < 8) {
1178 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1179 "interface %d INPUT_TERMINAL error\n",
1180 udev->devnum, alts->desc.bInterfaceNumber);
1181 return -EINVAL;
1182 }
1183
1184 /*
1185 * Reject invalid terminal types that would cause issues:
1186 *
1187 * - The high byte must be non-zero, otherwise it would be
1188 * confused with a unit.
1189 *
1190 * - Bit 15 must be 0, as we use it internally as a terminal
1191 * direction flag.
1192 *
1193 * Other unknown types are accepted.
1194 */
1195 type = get_unaligned_le16(&buffer[4]);
1196 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) {
1197 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1198 "interface %d INPUT_TERMINAL %d has invalid "
1199 "type 0x%04x, skipping\n", udev->devnum,
1200 alts->desc.bInterfaceNumber,
1201 buffer[3], type);
1202 return 0;
1203 }
1204
1205 n = 0;
1206 p = 0;
1207 len = 8;
1208
1209 if (type == UVC_ITT_CAMERA) {
1210 n = buflen >= 15 ? buffer[14] : 0;
1211 len = 15;
1212
1213 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1214 n = buflen >= 9 ? buffer[8] : 0;
1215 p = buflen >= 10 + n ? buffer[9+n] : 0;
1216 len = 10;
1217 }
1218
1219 if (buflen < len + n + p) {
1220 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1221 "interface %d INPUT_TERMINAL error\n",
1222 udev->devnum, alts->desc.bInterfaceNumber);
1223 return -EINVAL;
1224 }
1225
1226 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1227 1, n + p);
1228 if (term == NULL)
1229 return -ENOMEM;
1230
1231 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1232 term->camera.bControlSize = n;
1233 term->camera.bmControls = (u8 *)term + sizeof(*term);
1234 term->camera.wObjectiveFocalLengthMin =
1235 get_unaligned_le16(&buffer[8]);
1236 term->camera.wObjectiveFocalLengthMax =
1237 get_unaligned_le16(&buffer[10]);
1238 term->camera.wOcularFocalLength =
1239 get_unaligned_le16(&buffer[12]);
1240 memcpy(term->camera.bmControls, &buffer[15], n);
1241 } else if (UVC_ENTITY_TYPE(term) ==
1242 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1243 term->media.bControlSize = n;
1244 term->media.bmControls = (u8 *)term + sizeof(*term);
1245 term->media.bTransportModeSize = p;
1246 term->media.bmTransportModes = (u8 *)term
1247 + sizeof(*term) + n;
1248 memcpy(term->media.bmControls, &buffer[9], n);
1249 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1250 }
1251
1252 if (buffer[7] != 0)
1253 usb_string(udev, buffer[7], term->name,
1254 sizeof(term->name));
1255 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1256 sprintf(term->name, "Camera %u", buffer[3]);
1257 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1258 sprintf(term->name, "Media %u", buffer[3]);
1259 else
1260 sprintf(term->name, "Input %u", buffer[3]);
1261
1262 list_add_tail(&term->list, &dev->entities);
1263 break;
1264
1265 case UVC_VC_OUTPUT_TERMINAL:
1266 if (buflen < 9) {
1267 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1268 "interface %d OUTPUT_TERMINAL error\n",
1269 udev->devnum, alts->desc.bInterfaceNumber);
1270 return -EINVAL;
1271 }
1272
1273 /* Make sure the terminal type MSB is not null, otherwise it
1274 * could be confused with a unit.
1275 */
1276 type = get_unaligned_le16(&buffer[4]);
1277 if ((type & 0xff00) == 0) {
1278 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1279 "interface %d OUTPUT_TERMINAL %d has invalid "
1280 "type 0x%04x, skipping\n", udev->devnum,
1281 alts->desc.bInterfaceNumber, buffer[3], type);
1282 return 0;
1283 }
1284
1285 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1286 1, 0);
1287 if (term == NULL)
1288 return -ENOMEM;
1289
1290 memcpy(term->baSourceID, &buffer[7], 1);
1291
1292 if (buffer[8] != 0)
1293 usb_string(udev, buffer[8], term->name,
1294 sizeof(term->name));
1295 else
1296 sprintf(term->name, "Output %u", buffer[3]);
1297
1298 list_add_tail(&term->list, &dev->entities);
1299 break;
1300
1301 case UVC_VC_SELECTOR_UNIT:
1302 p = buflen >= 5 ? buffer[4] : 0;
1303
1304 if (buflen < 5 || buflen < 6 + p) {
1305 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1306 "interface %d SELECTOR_UNIT error\n",
1307 udev->devnum, alts->desc.bInterfaceNumber);
1308 return -EINVAL;
1309 }
1310
1311 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1312 if (unit == NULL)
1313 return -ENOMEM;
1314
1315 memcpy(unit->baSourceID, &buffer[5], p);
1316
1317 if (buffer[5+p] != 0)
1318 usb_string(udev, buffer[5+p], unit->name,
1319 sizeof(unit->name));
1320 else
1321 sprintf(unit->name, "Selector %u", buffer[3]);
1322
1323 list_add_tail(&unit->list, &dev->entities);
1324 break;
1325
1326 case UVC_VC_PROCESSING_UNIT:
1327 n = buflen >= 8 ? buffer[7] : 0;
1328 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1329
1330 if (buflen < p + n) {
1331 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1332 "interface %d PROCESSING_UNIT error\n",
1333 udev->devnum, alts->desc.bInterfaceNumber);
1334 return -EINVAL;
1335 }
1336
1337 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1338 if (unit == NULL)
1339 return -ENOMEM;
1340
1341 memcpy(unit->baSourceID, &buffer[4], 1);
1342 unit->processing.wMaxMultiplier =
1343 get_unaligned_le16(&buffer[5]);
1344 unit->processing.bControlSize = buffer[7];
1345 unit->processing.bmControls = (u8 *)unit + sizeof(*unit);
1346 memcpy(unit->processing.bmControls, &buffer[8], n);
1347 if (dev->uvc_version >= 0x0110)
1348 unit->processing.bmVideoStandards = buffer[9+n];
1349
1350 if (buffer[8+n] != 0)
1351 usb_string(udev, buffer[8+n], unit->name,
1352 sizeof(unit->name));
1353 else
1354 sprintf(unit->name, "Processing %u", buffer[3]);
1355
1356 list_add_tail(&unit->list, &dev->entities);
1357 break;
1358
1359 case UVC_VC_EXTENSION_UNIT:
1360 p = buflen >= 22 ? buffer[21] : 0;
1361 n = buflen >= 24 + p ? buffer[22+p] : 0;
1362
1363 if (buflen < 24 + p + n) {
1364 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1365 "interface %d EXTENSION_UNIT error\n",
1366 udev->devnum, alts->desc.bInterfaceNumber);
1367 return -EINVAL;
1368 }
1369
1370 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1371 if (unit == NULL)
1372 return -ENOMEM;
1373
1374 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1375 unit->extension.bNumControls = buffer[20];
1376 memcpy(unit->baSourceID, &buffer[22], p);
1377 unit->extension.bControlSize = buffer[22+p];
1378 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1379 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1380
1381 if (buffer[23+p+n] != 0)
1382 usb_string(udev, buffer[23+p+n], unit->name,
1383 sizeof(unit->name));
1384 else
1385 sprintf(unit->name, "Extension %u", buffer[3]);
1386
1387 list_add_tail(&unit->list, &dev->entities);
1388 break;
1389
1390 default:
1391 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1392 "descriptor (%u)\n", buffer[2]);
1393 break;
1394 }
1395
1396 return 0;
1397 }
1398
uvc_parse_control(struct uvc_device * dev)1399 static int uvc_parse_control(struct uvc_device *dev)
1400 {
1401 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1402 unsigned char *buffer = alts->extra;
1403 int buflen = alts->extralen;
1404 int ret;
1405
1406 /* Parse the default alternate setting only, as the UVC specification
1407 * defines a single alternate setting, the default alternate setting
1408 * zero.
1409 */
1410
1411 while (buflen > 2) {
1412 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1413 buffer[1] != USB_DT_CS_INTERFACE)
1414 goto next_descriptor;
1415
1416 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1417 return ret;
1418
1419 next_descriptor:
1420 buflen -= buffer[0];
1421 buffer += buffer[0];
1422 }
1423
1424 /* Check if the optional status endpoint is present. Built-in iSight
1425 * webcams have an interrupt endpoint but spit proprietary data that
1426 * don't conform to the UVC status endpoint messages. Don't try to
1427 * handle the interrupt endpoint for those cameras.
1428 */
1429 if (alts->desc.bNumEndpoints == 1 &&
1430 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1431 struct usb_host_endpoint *ep = &alts->endpoint[0];
1432 struct usb_endpoint_descriptor *desc = &ep->desc;
1433
1434 if (usb_endpoint_is_int_in(desc) &&
1435 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1436 desc->bInterval != 0) {
1437 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1438 "(addr %02x).\n", desc->bEndpointAddress);
1439 dev->int_ep = ep;
1440 }
1441 }
1442
1443 return 0;
1444 }
1445
1446 /* ------------------------------------------------------------------------
1447 * UVC device scan
1448 */
1449
1450 /*
1451 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1452 * and containing the following units:
1453 *
1454 * - one or more Output Terminals (USB Streaming or Display)
1455 * - zero or one Processing Unit
1456 * - zero, one or more single-input Selector Units
1457 * - zero or one multiple-input Selector Units, provided all inputs are
1458 * connected to input terminals
1459 * - zero, one or mode single-input Extension Units
1460 * - one or more Input Terminals (Camera, External or USB Streaming)
1461 *
1462 * The terminal and units must match on of the following structures:
1463 *
1464 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1465 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1466 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1467 *
1468 * +---------+ +---------+ -> OTT_*(0)
1469 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1470 * +---------+ +---------+ -> OTT_*(n)
1471 *
1472 * The Processing Unit and Extension Units can be in any order. Additional
1473 * Extension Units connected to the main chain as single-unit branches are
1474 * also supported. Single-input Selector Units are ignored.
1475 */
uvc_scan_chain_entity(struct uvc_video_chain * chain,struct uvc_entity * entity)1476 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1477 struct uvc_entity *entity)
1478 {
1479 switch (UVC_ENTITY_TYPE(entity)) {
1480 case UVC_VC_EXTENSION_UNIT:
1481 if (uvc_trace_param & UVC_TRACE_PROBE)
1482 printk(KERN_CONT " <- XU %d", entity->id);
1483
1484 if (entity->bNrInPins != 1) {
1485 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1486 "than 1 input pin.\n", entity->id);
1487 return -1;
1488 }
1489
1490 break;
1491
1492 case UVC_VC_PROCESSING_UNIT:
1493 if (uvc_trace_param & UVC_TRACE_PROBE)
1494 printk(KERN_CONT " <- PU %d", entity->id);
1495
1496 if (chain->processing != NULL) {
1497 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1498 "Processing Units in chain.\n");
1499 return -1;
1500 }
1501
1502 chain->processing = entity;
1503 break;
1504
1505 case UVC_VC_SELECTOR_UNIT:
1506 if (uvc_trace_param & UVC_TRACE_PROBE)
1507 printk(KERN_CONT " <- SU %d", entity->id);
1508
1509 /* Single-input selector units are ignored. */
1510 if (entity->bNrInPins == 1)
1511 break;
1512
1513 if (chain->selector != NULL) {
1514 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1515 "Units in chain.\n");
1516 return -1;
1517 }
1518
1519 chain->selector = entity;
1520 break;
1521
1522 case UVC_ITT_VENDOR_SPECIFIC:
1523 case UVC_ITT_CAMERA:
1524 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1525 if (uvc_trace_param & UVC_TRACE_PROBE)
1526 printk(KERN_CONT " <- IT %d\n", entity->id);
1527
1528 break;
1529
1530 case UVC_OTT_VENDOR_SPECIFIC:
1531 case UVC_OTT_DISPLAY:
1532 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1533 if (uvc_trace_param & UVC_TRACE_PROBE)
1534 printk(KERN_CONT " OT %d", entity->id);
1535
1536 break;
1537
1538 case UVC_TT_STREAMING:
1539 if (UVC_ENTITY_IS_ITERM(entity)) {
1540 if (uvc_trace_param & UVC_TRACE_PROBE)
1541 printk(KERN_CONT " <- IT %d\n", entity->id);
1542 } else {
1543 if (uvc_trace_param & UVC_TRACE_PROBE)
1544 printk(KERN_CONT " OT %d", entity->id);
1545 }
1546
1547 break;
1548
1549 default:
1550 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1551 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1552 return -1;
1553 }
1554
1555 list_add_tail(&entity->chain, &chain->entities);
1556 return 0;
1557 }
1558
uvc_scan_chain_forward(struct uvc_video_chain * chain,struct uvc_entity * entity,struct uvc_entity * prev)1559 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1560 struct uvc_entity *entity, struct uvc_entity *prev)
1561 {
1562 struct uvc_entity *forward;
1563 int found;
1564
1565 /* Forward scan */
1566 forward = NULL;
1567 found = 0;
1568
1569 while (1) {
1570 forward = uvc_entity_by_reference(chain->dev, entity->id,
1571 forward);
1572 if (forward == NULL)
1573 break;
1574 if (forward == prev)
1575 continue;
1576 if (forward->chain.next || forward->chain.prev) {
1577 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1578 "entity %d already in chain.\n", forward->id);
1579 return -EINVAL;
1580 }
1581
1582 switch (UVC_ENTITY_TYPE(forward)) {
1583 case UVC_VC_EXTENSION_UNIT:
1584 if (forward->bNrInPins != 1) {
1585 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1586 "has more than 1 input pin.\n",
1587 entity->id);
1588 return -EINVAL;
1589 }
1590
1591 /*
1592 * Some devices reference an output terminal as the
1593 * source of extension units. This is incorrect, as
1594 * output terminals only have an input pin, and thus
1595 * can't be connected to any entity in the forward
1596 * direction. The resulting topology would cause issues
1597 * when registering the media controller graph. To
1598 * avoid this problem, connect the extension unit to
1599 * the source of the output terminal instead.
1600 */
1601 if (UVC_ENTITY_IS_OTERM(entity)) {
1602 struct uvc_entity *source;
1603
1604 source = uvc_entity_by_id(chain->dev,
1605 entity->baSourceID[0]);
1606 if (!source) {
1607 uvc_trace(UVC_TRACE_DESCR,
1608 "Can't connect extension unit %u in chain\n",
1609 forward->id);
1610 break;
1611 }
1612
1613 forward->baSourceID[0] = source->id;
1614 }
1615
1616 list_add_tail(&forward->chain, &chain->entities);
1617 if (uvc_trace_param & UVC_TRACE_PROBE) {
1618 if (!found)
1619 printk(KERN_CONT " (->");
1620
1621 printk(KERN_CONT " XU %d", forward->id);
1622 found = 1;
1623 }
1624 break;
1625
1626 case UVC_OTT_VENDOR_SPECIFIC:
1627 case UVC_OTT_DISPLAY:
1628 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1629 case UVC_TT_STREAMING:
1630 if (UVC_ENTITY_IS_ITERM(forward)) {
1631 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1632 "terminal %u.\n", forward->id);
1633 return -EINVAL;
1634 }
1635
1636 if (UVC_ENTITY_IS_OTERM(entity)) {
1637 uvc_trace(UVC_TRACE_DESCR,
1638 "Unsupported connection between output terminals %u and %u\n",
1639 entity->id, forward->id);
1640 break;
1641 }
1642
1643 list_add_tail(&forward->chain, &chain->entities);
1644 if (uvc_trace_param & UVC_TRACE_PROBE) {
1645 if (!found)
1646 printk(KERN_CONT " (->");
1647
1648 printk(KERN_CONT " OT %d", forward->id);
1649 found = 1;
1650 }
1651 break;
1652 }
1653 }
1654 if (found)
1655 printk(KERN_CONT ")");
1656
1657 return 0;
1658 }
1659
uvc_scan_chain_backward(struct uvc_video_chain * chain,struct uvc_entity ** _entity)1660 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1661 struct uvc_entity **_entity)
1662 {
1663 struct uvc_entity *entity = *_entity;
1664 struct uvc_entity *term;
1665 int id = -EINVAL, i;
1666
1667 switch (UVC_ENTITY_TYPE(entity)) {
1668 case UVC_VC_EXTENSION_UNIT:
1669 case UVC_VC_PROCESSING_UNIT:
1670 id = entity->baSourceID[0];
1671 break;
1672
1673 case UVC_VC_SELECTOR_UNIT:
1674 /* Single-input selector units are ignored. */
1675 if (entity->bNrInPins == 1) {
1676 id = entity->baSourceID[0];
1677 break;
1678 }
1679
1680 if (uvc_trace_param & UVC_TRACE_PROBE)
1681 printk(KERN_CONT " <- IT");
1682
1683 chain->selector = entity;
1684 for (i = 0; i < entity->bNrInPins; ++i) {
1685 id = entity->baSourceID[i];
1686 term = uvc_entity_by_id(chain->dev, id);
1687 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1688 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1689 "input %d isn't connected to an "
1690 "input terminal\n", entity->id, i);
1691 return -1;
1692 }
1693
1694 if (term->chain.next || term->chain.prev) {
1695 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1696 "entity %d already in chain.\n",
1697 term->id);
1698 return -EINVAL;
1699 }
1700
1701 if (uvc_trace_param & UVC_TRACE_PROBE)
1702 printk(KERN_CONT " %d", term->id);
1703
1704 list_add_tail(&term->chain, &chain->entities);
1705 uvc_scan_chain_forward(chain, term, entity);
1706 }
1707
1708 if (uvc_trace_param & UVC_TRACE_PROBE)
1709 printk(KERN_CONT "\n");
1710
1711 id = 0;
1712 break;
1713
1714 case UVC_ITT_VENDOR_SPECIFIC:
1715 case UVC_ITT_CAMERA:
1716 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1717 case UVC_OTT_VENDOR_SPECIFIC:
1718 case UVC_OTT_DISPLAY:
1719 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1720 case UVC_TT_STREAMING:
1721 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1722 break;
1723 }
1724
1725 if (id <= 0) {
1726 *_entity = NULL;
1727 return id;
1728 }
1729
1730 entity = uvc_entity_by_id(chain->dev, id);
1731 if (entity == NULL) {
1732 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1733 "unknown entity %d.\n", id);
1734 return -EINVAL;
1735 }
1736
1737 *_entity = entity;
1738 return 0;
1739 }
1740
uvc_scan_chain(struct uvc_video_chain * chain,struct uvc_entity * term)1741 static int uvc_scan_chain(struct uvc_video_chain *chain,
1742 struct uvc_entity *term)
1743 {
1744 struct uvc_entity *entity, *prev;
1745
1746 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1747
1748 entity = term;
1749 prev = NULL;
1750
1751 while (entity != NULL) {
1752 /* Entity must not be part of an existing chain */
1753 if (entity->chain.next || entity->chain.prev) {
1754 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1755 "entity %d already in chain.\n", entity->id);
1756 return -EINVAL;
1757 }
1758
1759 /* Process entity */
1760 if (uvc_scan_chain_entity(chain, entity) < 0)
1761 return -EINVAL;
1762
1763 /* Forward scan */
1764 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1765 return -EINVAL;
1766
1767 /* Backward scan */
1768 prev = entity;
1769 if (uvc_scan_chain_backward(chain, &entity) < 0)
1770 return -EINVAL;
1771 }
1772
1773 return 0;
1774 }
1775
uvc_print_terms(struct list_head * terms,u16 dir,char * buffer)1776 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1777 char *buffer)
1778 {
1779 struct uvc_entity *term;
1780 unsigned int nterms = 0;
1781 char *p = buffer;
1782
1783 list_for_each_entry(term, terms, chain) {
1784 if (!UVC_ENTITY_IS_TERM(term) ||
1785 UVC_TERM_DIRECTION(term) != dir)
1786 continue;
1787
1788 if (nterms)
1789 p += sprintf(p, ",");
1790 if (++nterms >= 4) {
1791 p += sprintf(p, "...");
1792 break;
1793 }
1794 p += sprintf(p, "%u", term->id);
1795 }
1796
1797 return p - buffer;
1798 }
1799
uvc_print_chain(struct uvc_video_chain * chain)1800 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1801 {
1802 static char buffer[43];
1803 char *p = buffer;
1804
1805 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1806 p += sprintf(p, " -> ");
1807 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1808
1809 return buffer;
1810 }
1811
uvc_alloc_chain(struct uvc_device * dev)1812 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1813 {
1814 struct uvc_video_chain *chain;
1815
1816 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1817 if (chain == NULL)
1818 return NULL;
1819
1820 INIT_LIST_HEAD(&chain->entities);
1821 mutex_init(&chain->ctrl_mutex);
1822 chain->dev = dev;
1823 v4l2_prio_init(&chain->prio);
1824
1825 return chain;
1826 }
1827
1828 /*
1829 * Fallback heuristic for devices that don't connect units and terminals in a
1830 * valid chain.
1831 *
1832 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1833 * to fail, but if we just take the entities we can find and put them together
1834 * in the most sensible chain we can think of, turns out they do work anyway.
1835 * Note: This heuristic assumes there is a single chain.
1836 *
1837 * At the time of writing, devices known to have such a broken chain are
1838 * - Acer Integrated Camera (5986:055a)
1839 * - Realtek rtl157a7 (0bda:57a7)
1840 */
uvc_scan_fallback(struct uvc_device * dev)1841 static int uvc_scan_fallback(struct uvc_device *dev)
1842 {
1843 struct uvc_video_chain *chain;
1844 struct uvc_entity *iterm = NULL;
1845 struct uvc_entity *oterm = NULL;
1846 struct uvc_entity *entity;
1847 struct uvc_entity *prev;
1848
1849 /*
1850 * Start by locating the input and output terminals. We only support
1851 * devices with exactly one of each for now.
1852 */
1853 list_for_each_entry(entity, &dev->entities, list) {
1854 if (UVC_ENTITY_IS_ITERM(entity)) {
1855 if (iterm)
1856 return -EINVAL;
1857 iterm = entity;
1858 }
1859
1860 if (UVC_ENTITY_IS_OTERM(entity)) {
1861 if (oterm)
1862 return -EINVAL;
1863 oterm = entity;
1864 }
1865 }
1866
1867 if (iterm == NULL || oterm == NULL)
1868 return -EINVAL;
1869
1870 /* Allocate the chain and fill it. */
1871 chain = uvc_alloc_chain(dev);
1872 if (chain == NULL)
1873 return -ENOMEM;
1874
1875 if (uvc_scan_chain_entity(chain, oterm) < 0)
1876 goto error;
1877
1878 prev = oterm;
1879
1880 /*
1881 * Add all Processing and Extension Units with two pads. The order
1882 * doesn't matter much, use reverse list traversal to connect units in
1883 * UVC descriptor order as we build the chain from output to input. This
1884 * leads to units appearing in the order meant by the manufacturer for
1885 * the cameras known to require this heuristic.
1886 */
1887 list_for_each_entry_reverse(entity, &dev->entities, list) {
1888 if (entity->type != UVC_VC_PROCESSING_UNIT &&
1889 entity->type != UVC_VC_EXTENSION_UNIT)
1890 continue;
1891
1892 if (entity->num_pads != 2)
1893 continue;
1894
1895 if (uvc_scan_chain_entity(chain, entity) < 0)
1896 goto error;
1897
1898 prev->baSourceID[0] = entity->id;
1899 prev = entity;
1900 }
1901
1902 if (uvc_scan_chain_entity(chain, iterm) < 0)
1903 goto error;
1904
1905 prev->baSourceID[0] = iterm->id;
1906
1907 list_add_tail(&chain->list, &dev->chains);
1908
1909 uvc_trace(UVC_TRACE_PROBE,
1910 "Found a video chain by fallback heuristic (%s).\n",
1911 uvc_print_chain(chain));
1912
1913 return 0;
1914
1915 error:
1916 kfree(chain);
1917 return -EINVAL;
1918 }
1919
1920 /*
1921 * Scan the device for video chains and register video devices.
1922 *
1923 * Chains are scanned starting at their output terminals and walked backwards.
1924 */
uvc_scan_device(struct uvc_device * dev)1925 static int uvc_scan_device(struct uvc_device *dev)
1926 {
1927 struct uvc_video_chain *chain;
1928 struct uvc_entity *term;
1929
1930 list_for_each_entry(term, &dev->entities, list) {
1931 if (!UVC_ENTITY_IS_OTERM(term))
1932 continue;
1933
1934 /* If the terminal is already included in a chain, skip it.
1935 * This can happen for chains that have multiple output
1936 * terminals, where all output terminals beside the first one
1937 * will be inserted in the chain in forward scans.
1938 */
1939 if (term->chain.next || term->chain.prev)
1940 continue;
1941
1942 chain = uvc_alloc_chain(dev);
1943 if (chain == NULL)
1944 return -ENOMEM;
1945
1946 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1947
1948 if (uvc_scan_chain(chain, term) < 0) {
1949 kfree(chain);
1950 continue;
1951 }
1952
1953 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1954 uvc_print_chain(chain));
1955
1956 list_add_tail(&chain->list, &dev->chains);
1957 }
1958
1959 if (list_empty(&dev->chains))
1960 uvc_scan_fallback(dev);
1961
1962 if (list_empty(&dev->chains)) {
1963 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1964 return -1;
1965 }
1966
1967 return 0;
1968 }
1969
1970 /* ------------------------------------------------------------------------
1971 * Video device registration and unregistration
1972 */
1973
1974 /*
1975 * Delete the UVC device.
1976 *
1977 * Called by the kernel when the last reference to the uvc_device structure
1978 * is released.
1979 *
1980 * As this function is called after or during disconnect(), all URBs have
1981 * already been cancelled by the USB core. There is no need to kill the
1982 * interrupt URB manually.
1983 */
uvc_delete(struct kref * kref)1984 static void uvc_delete(struct kref *kref)
1985 {
1986 struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
1987 struct list_head *p, *n;
1988
1989 uvc_status_cleanup(dev);
1990 uvc_ctrl_cleanup_device(dev);
1991
1992 usb_put_intf(dev->intf);
1993 usb_put_dev(dev->udev);
1994
1995 #ifdef CONFIG_MEDIA_CONTROLLER
1996 media_device_cleanup(&dev->mdev);
1997 #endif
1998
1999 list_for_each_safe(p, n, &dev->chains) {
2000 struct uvc_video_chain *chain;
2001 chain = list_entry(p, struct uvc_video_chain, list);
2002 kfree(chain);
2003 }
2004
2005 list_for_each_safe(p, n, &dev->entities) {
2006 struct uvc_entity *entity;
2007 entity = list_entry(p, struct uvc_entity, list);
2008 #ifdef CONFIG_MEDIA_CONTROLLER
2009 uvc_mc_cleanup_entity(entity);
2010 #endif
2011 kfree(entity);
2012 }
2013
2014 list_for_each_safe(p, n, &dev->streams) {
2015 struct uvc_streaming *streaming;
2016 streaming = list_entry(p, struct uvc_streaming, list);
2017 usb_driver_release_interface(&uvc_driver.driver,
2018 streaming->intf);
2019 uvc_stream_delete(streaming);
2020 }
2021
2022 kfree(dev);
2023 }
2024
uvc_release(struct video_device * vdev)2025 static void uvc_release(struct video_device *vdev)
2026 {
2027 struct uvc_streaming *stream = video_get_drvdata(vdev);
2028 struct uvc_device *dev = stream->dev;
2029
2030 kref_put(&dev->ref, uvc_delete);
2031 }
2032
2033 /*
2034 * Unregister the video devices.
2035 */
uvc_unregister_video(struct uvc_device * dev)2036 static void uvc_unregister_video(struct uvc_device *dev)
2037 {
2038 struct uvc_streaming *stream;
2039
2040 list_for_each_entry(stream, &dev->streams, list) {
2041 if (!video_is_registered(&stream->vdev))
2042 continue;
2043
2044 video_unregister_device(&stream->vdev);
2045 video_unregister_device(&stream->meta.vdev);
2046
2047 uvc_debugfs_cleanup_stream(stream);
2048 }
2049
2050 uvc_status_unregister(dev);
2051
2052 if (dev->vdev.dev)
2053 v4l2_device_unregister(&dev->vdev);
2054 #ifdef CONFIG_MEDIA_CONTROLLER
2055 if (media_devnode_is_registered(dev->mdev.devnode))
2056 media_device_unregister(&dev->mdev);
2057 #endif
2058 }
2059
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)2060 int uvc_register_video_device(struct uvc_device *dev,
2061 struct uvc_streaming *stream,
2062 struct video_device *vdev,
2063 struct uvc_video_queue *queue,
2064 enum v4l2_buf_type type,
2065 const struct v4l2_file_operations *fops,
2066 const struct v4l2_ioctl_ops *ioctl_ops)
2067 {
2068 int ret;
2069
2070 /* Initialize the video buffers queue. */
2071 ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
2072 if (ret)
2073 return ret;
2074
2075 /* Register the device with V4L. */
2076
2077 /*
2078 * We already hold a reference to dev->udev. The video device will be
2079 * unregistered before the reference is released, so we don't need to
2080 * get another one.
2081 */
2082 vdev->v4l2_dev = &dev->vdev;
2083 vdev->fops = fops;
2084 vdev->ioctl_ops = ioctl_ops;
2085 vdev->release = uvc_release;
2086 vdev->prio = &stream->chain->prio;
2087 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2088 vdev->vfl_dir = VFL_DIR_TX;
2089 else
2090 vdev->vfl_dir = VFL_DIR_RX;
2091
2092 switch (type) {
2093 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
2094 default:
2095 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
2096 break;
2097 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
2098 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
2099 break;
2100 case V4L2_BUF_TYPE_META_CAPTURE:
2101 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
2102 break;
2103 }
2104
2105 strscpy(vdev->name, dev->name, sizeof(vdev->name));
2106
2107 /*
2108 * Set the driver data before calling video_register_device, otherwise
2109 * the file open() handler might race us.
2110 */
2111 video_set_drvdata(vdev, stream);
2112
2113 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
2114 if (ret < 0) {
2115 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
2116 v4l2_type_names[type], ret);
2117 return ret;
2118 }
2119
2120 kref_get(&dev->ref);
2121 return 0;
2122 }
2123
uvc_register_video(struct uvc_device * dev,struct uvc_streaming * stream)2124 static int uvc_register_video(struct uvc_device *dev,
2125 struct uvc_streaming *stream)
2126 {
2127 int ret;
2128
2129 /* Initialize the streaming interface with default parameters. */
2130 ret = uvc_video_init(stream);
2131 if (ret < 0) {
2132 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
2133 ret);
2134 return ret;
2135 }
2136
2137 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2138 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
2139 | V4L2_CAP_META_CAPTURE;
2140 else
2141 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
2142
2143 uvc_debugfs_init_stream(stream);
2144
2145 /* Register the device with V4L. */
2146 return uvc_register_video_device(dev, stream, &stream->vdev,
2147 &stream->queue, stream->type,
2148 &uvc_fops, &uvc_ioctl_ops);
2149 }
2150
2151 /*
2152 * Register all video devices in all chains.
2153 */
uvc_register_terms(struct uvc_device * dev,struct uvc_video_chain * chain)2154 static int uvc_register_terms(struct uvc_device *dev,
2155 struct uvc_video_chain *chain)
2156 {
2157 struct uvc_streaming *stream;
2158 struct uvc_entity *term;
2159 int ret;
2160
2161 list_for_each_entry(term, &chain->entities, chain) {
2162 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
2163 continue;
2164
2165 stream = uvc_stream_by_id(dev, term->id);
2166 if (stream == NULL) {
2167 uvc_printk(KERN_INFO, "No streaming interface found "
2168 "for terminal %u.", term->id);
2169 continue;
2170 }
2171
2172 stream->chain = chain;
2173 ret = uvc_register_video(dev, stream);
2174 if (ret < 0)
2175 return ret;
2176
2177 /* Register a metadata node, but ignore a possible failure,
2178 * complete registration of video nodes anyway.
2179 */
2180 uvc_meta_register(stream);
2181
2182 term->vdev = &stream->vdev;
2183 }
2184
2185 return 0;
2186 }
2187
uvc_register_chains(struct uvc_device * dev)2188 static int uvc_register_chains(struct uvc_device *dev)
2189 {
2190 struct uvc_video_chain *chain;
2191 int ret;
2192
2193 list_for_each_entry(chain, &dev->chains, list) {
2194 ret = uvc_register_terms(dev, chain);
2195 if (ret < 0)
2196 return ret;
2197
2198 #ifdef CONFIG_MEDIA_CONTROLLER
2199 ret = uvc_mc_register_entities(chain);
2200 if (ret < 0)
2201 uvc_printk(KERN_INFO,
2202 "Failed to register entities (%d).\n", ret);
2203 #endif
2204 }
2205
2206 return 0;
2207 }
2208
2209 /* ------------------------------------------------------------------------
2210 * USB probe, disconnect, suspend and resume
2211 */
2212
2213 static const struct uvc_device_info uvc_quirk_none = { 0 };
2214
uvc_probe(struct usb_interface * intf,const struct usb_device_id * id)2215 static int uvc_probe(struct usb_interface *intf,
2216 const struct usb_device_id *id)
2217 {
2218 struct usb_device *udev = interface_to_usbdev(intf);
2219 struct uvc_device *dev;
2220 const struct uvc_device_info *info =
2221 (const struct uvc_device_info *)id->driver_info;
2222 int function;
2223 int ret;
2224
2225 if (id->idVendor && id->idProduct)
2226 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
2227 "(%04x:%04x)\n", udev->devpath, id->idVendor,
2228 id->idProduct);
2229 else
2230 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
2231 udev->devpath);
2232
2233 /* Allocate memory for the device and initialize it. */
2234 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2235 if (dev == NULL)
2236 return -ENOMEM;
2237
2238 INIT_LIST_HEAD(&dev->entities);
2239 INIT_LIST_HEAD(&dev->chains);
2240 INIT_LIST_HEAD(&dev->streams);
2241 kref_init(&dev->ref);
2242 atomic_set(&dev->nmappings, 0);
2243 mutex_init(&dev->lock);
2244
2245 dev->udev = usb_get_dev(udev);
2246 dev->intf = usb_get_intf(intf);
2247 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
2248 dev->info = info ? info : &uvc_quirk_none;
2249 dev->quirks = uvc_quirks_param == -1
2250 ? dev->info->quirks : uvc_quirks_param;
2251
2252 if (udev->product != NULL)
2253 strscpy(dev->name, udev->product, sizeof(dev->name));
2254 else
2255 snprintf(dev->name, sizeof(dev->name),
2256 "UVC Camera (%04x:%04x)",
2257 le16_to_cpu(udev->descriptor.idVendor),
2258 le16_to_cpu(udev->descriptor.idProduct));
2259
2260 /*
2261 * Add iFunction or iInterface to names when available as additional
2262 * distinguishers between interfaces. iFunction is prioritized over
2263 * iInterface which matches Windows behavior at the point of writing.
2264 */
2265 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
2266 function = intf->intf_assoc->iFunction;
2267 else
2268 function = intf->cur_altsetting->desc.iInterface;
2269 if (function != 0) {
2270 size_t len;
2271
2272 strlcat(dev->name, ": ", sizeof(dev->name));
2273 len = strlen(dev->name);
2274 usb_string(udev, function, dev->name + len,
2275 sizeof(dev->name) - len);
2276 }
2277
2278 /* Initialize the media device. */
2279 #ifdef CONFIG_MEDIA_CONTROLLER
2280 dev->mdev.dev = &intf->dev;
2281 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
2282 if (udev->serial)
2283 strscpy(dev->mdev.serial, udev->serial,
2284 sizeof(dev->mdev.serial));
2285 usb_make_path(udev, dev->mdev.bus_info, sizeof(dev->mdev.bus_info));
2286 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
2287 media_device_init(&dev->mdev);
2288
2289 dev->vdev.mdev = &dev->mdev;
2290 #endif
2291
2292 /* Parse the Video Class control descriptor. */
2293 if (uvc_parse_control(dev) < 0) {
2294 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
2295 "descriptors.\n");
2296 goto error;
2297 }
2298
2299 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2300 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2301 udev->product ? udev->product : "<unnamed>",
2302 le16_to_cpu(udev->descriptor.idVendor),
2303 le16_to_cpu(udev->descriptor.idProduct));
2304
2305 if (dev->quirks != dev->info->quirks) {
2306 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
2307 "parameter for testing purpose.\n", dev->quirks);
2308 uvc_printk(KERN_INFO, "Please report required quirks to the "
2309 "linux-uvc-devel mailing list.\n");
2310 }
2311
2312 /* Register the V4L2 device. */
2313 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2314 goto error;
2315
2316 /* Initialize controls. */
2317 if (uvc_ctrl_init_device(dev) < 0)
2318 goto error;
2319
2320 /* Scan the device for video chains. */
2321 if (uvc_scan_device(dev) < 0)
2322 goto error;
2323
2324 /* Register video device nodes. */
2325 if (uvc_register_chains(dev) < 0)
2326 goto error;
2327
2328 #ifdef CONFIG_MEDIA_CONTROLLER
2329 /* Register the media device node */
2330 if (media_device_register(&dev->mdev) < 0)
2331 goto error;
2332 #endif
2333 /* Save our data pointer in the interface data. */
2334 usb_set_intfdata(intf, dev);
2335
2336 /* Initialize the interrupt URB. */
2337 if ((ret = uvc_status_init(dev)) < 0) {
2338 uvc_printk(KERN_INFO, "Unable to initialize the status "
2339 "endpoint (%d), status interrupt will not be "
2340 "supported.\n", ret);
2341 }
2342
2343 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
2344 usb_enable_autosuspend(udev);
2345 return 0;
2346
2347 error:
2348 uvc_unregister_video(dev);
2349 kref_put(&dev->ref, uvc_delete);
2350 return -ENODEV;
2351 }
2352
uvc_disconnect(struct usb_interface * intf)2353 static void uvc_disconnect(struct usb_interface *intf)
2354 {
2355 struct uvc_device *dev = usb_get_intfdata(intf);
2356
2357 /* Set the USB interface data to NULL. This can be done outside the
2358 * lock, as there's no other reader.
2359 */
2360 usb_set_intfdata(intf, NULL);
2361
2362 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2363 UVC_SC_VIDEOSTREAMING)
2364 return;
2365
2366 uvc_unregister_video(dev);
2367 kref_put(&dev->ref, uvc_delete);
2368 }
2369
uvc_suspend(struct usb_interface * intf,pm_message_t message)2370 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2371 {
2372 struct uvc_device *dev = usb_get_intfdata(intf);
2373 struct uvc_streaming *stream;
2374
2375 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
2376 intf->cur_altsetting->desc.bInterfaceNumber);
2377
2378 /* Controls are cached on the fly so they don't need to be saved. */
2379 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2380 UVC_SC_VIDEOCONTROL) {
2381 mutex_lock(&dev->lock);
2382 if (dev->users)
2383 uvc_status_stop(dev);
2384 mutex_unlock(&dev->lock);
2385 return 0;
2386 }
2387
2388 list_for_each_entry(stream, &dev->streams, list) {
2389 if (stream->intf == intf)
2390 return uvc_video_suspend(stream);
2391 }
2392
2393 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2394 "mismatch.\n");
2395 return -EINVAL;
2396 }
2397
__uvc_resume(struct usb_interface * intf,int reset)2398 static int __uvc_resume(struct usb_interface *intf, int reset)
2399 {
2400 struct uvc_device *dev = usb_get_intfdata(intf);
2401 struct uvc_streaming *stream;
2402 int ret = 0;
2403
2404 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2405 intf->cur_altsetting->desc.bInterfaceNumber);
2406
2407 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2408 UVC_SC_VIDEOCONTROL) {
2409 if (reset) {
2410 ret = uvc_ctrl_restore_values(dev);
2411 if (ret < 0)
2412 return ret;
2413 }
2414
2415 mutex_lock(&dev->lock);
2416 if (dev->users)
2417 ret = uvc_status_start(dev, GFP_NOIO);
2418 mutex_unlock(&dev->lock);
2419
2420 return ret;
2421 }
2422
2423 list_for_each_entry(stream, &dev->streams, list) {
2424 if (stream->intf == intf) {
2425 ret = uvc_video_resume(stream, reset);
2426 if (ret < 0)
2427 uvc_queue_streamoff(&stream->queue,
2428 stream->queue.queue.type);
2429 return ret;
2430 }
2431 }
2432
2433 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2434 "mismatch.\n");
2435 return -EINVAL;
2436 }
2437
uvc_resume(struct usb_interface * intf)2438 static int uvc_resume(struct usb_interface *intf)
2439 {
2440 return __uvc_resume(intf, 0);
2441 }
2442
uvc_reset_resume(struct usb_interface * intf)2443 static int uvc_reset_resume(struct usb_interface *intf)
2444 {
2445 return __uvc_resume(intf, 1);
2446 }
2447
2448 /* ------------------------------------------------------------------------
2449 * Module parameters
2450 */
2451
uvc_clock_param_get(char * buffer,const struct kernel_param * kp)2452 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
2453 {
2454 if (uvc_clock_param == CLOCK_MONOTONIC)
2455 return sprintf(buffer, "CLOCK_MONOTONIC");
2456 else
2457 return sprintf(buffer, "CLOCK_REALTIME");
2458 }
2459
uvc_clock_param_set(const char * val,const struct kernel_param * kp)2460 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
2461 {
2462 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2463 val += strlen("clock_");
2464
2465 if (strcasecmp(val, "monotonic") == 0)
2466 uvc_clock_param = CLOCK_MONOTONIC;
2467 else if (strcasecmp(val, "realtime") == 0)
2468 uvc_clock_param = CLOCK_REALTIME;
2469 else
2470 return -EINVAL;
2471
2472 return 0;
2473 }
2474
2475 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2476 &uvc_clock_param, S_IRUGO|S_IWUSR);
2477 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2478 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2479 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2480 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2481 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2482 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2483 MODULE_PARM_DESC(quirks, "Forced device quirks");
2484 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2485 MODULE_PARM_DESC(trace, "Trace level bitmask");
2486 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2487 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2488
2489 /* ------------------------------------------------------------------------
2490 * Driver initialization and cleanup
2491 */
2492
2493 static const struct uvc_device_info uvc_quirk_probe_minmax = {
2494 .quirks = UVC_QUIRK_PROBE_MINMAX,
2495 };
2496
2497 static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
2498 .quirks = UVC_QUIRK_FIX_BANDWIDTH,
2499 };
2500
2501 static const struct uvc_device_info uvc_quirk_probe_def = {
2502 .quirks = UVC_QUIRK_PROBE_DEF,
2503 };
2504
2505 static const struct uvc_device_info uvc_quirk_stream_no_fid = {
2506 .quirks = UVC_QUIRK_STREAM_NO_FID,
2507 };
2508
2509 static const struct uvc_device_info uvc_quirk_force_y8 = {
2510 .quirks = UVC_QUIRK_FORCE_Y8,
2511 };
2512
2513 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
2514 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \
2515 {.meta_format = m}
2516
2517 /*
2518 * The Logitech cameras listed below have their interface class set to
2519 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2520 * though they are compliant.
2521 */
2522 static const struct usb_device_id uvc_ids[] = {
2523 /* LogiLink Wireless Webcam */
2524 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2525 | USB_DEVICE_ID_MATCH_INT_INFO,
2526 .idVendor = 0x0416,
2527 .idProduct = 0xa91a,
2528 .bInterfaceClass = USB_CLASS_VIDEO,
2529 .bInterfaceSubClass = 1,
2530 .bInterfaceProtocol = 0,
2531 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2532 /* Genius eFace 2025 */
2533 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2534 | USB_DEVICE_ID_MATCH_INT_INFO,
2535 .idVendor = 0x0458,
2536 .idProduct = 0x706e,
2537 .bInterfaceClass = USB_CLASS_VIDEO,
2538 .bInterfaceSubClass = 1,
2539 .bInterfaceProtocol = 0,
2540 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2541 /* Microsoft Lifecam NX-6000 */
2542 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2543 | USB_DEVICE_ID_MATCH_INT_INFO,
2544 .idVendor = 0x045e,
2545 .idProduct = 0x00f8,
2546 .bInterfaceClass = USB_CLASS_VIDEO,
2547 .bInterfaceSubClass = 1,
2548 .bInterfaceProtocol = 0,
2549 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2550 /* Microsoft Lifecam NX-3000 */
2551 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2552 | USB_DEVICE_ID_MATCH_INT_INFO,
2553 .idVendor = 0x045e,
2554 .idProduct = 0x0721,
2555 .bInterfaceClass = USB_CLASS_VIDEO,
2556 .bInterfaceSubClass = 1,
2557 .bInterfaceProtocol = 0,
2558 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2559 /* Microsoft Lifecam VX-7000 */
2560 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2561 | USB_DEVICE_ID_MATCH_INT_INFO,
2562 .idVendor = 0x045e,
2563 .idProduct = 0x0723,
2564 .bInterfaceClass = USB_CLASS_VIDEO,
2565 .bInterfaceSubClass = 1,
2566 .bInterfaceProtocol = 0,
2567 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2568 /* Logitech Quickcam Fusion */
2569 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2570 | USB_DEVICE_ID_MATCH_INT_INFO,
2571 .idVendor = 0x046d,
2572 .idProduct = 0x08c1,
2573 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2574 .bInterfaceSubClass = 1,
2575 .bInterfaceProtocol = 0 },
2576 /* Logitech Quickcam Orbit MP */
2577 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2578 | USB_DEVICE_ID_MATCH_INT_INFO,
2579 .idVendor = 0x046d,
2580 .idProduct = 0x08c2,
2581 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2582 .bInterfaceSubClass = 1,
2583 .bInterfaceProtocol = 0 },
2584 /* Logitech Quickcam Pro for Notebook */
2585 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2586 | USB_DEVICE_ID_MATCH_INT_INFO,
2587 .idVendor = 0x046d,
2588 .idProduct = 0x08c3,
2589 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2590 .bInterfaceSubClass = 1,
2591 .bInterfaceProtocol = 0 },
2592 /* Logitech Quickcam Pro 5000 */
2593 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2594 | USB_DEVICE_ID_MATCH_INT_INFO,
2595 .idVendor = 0x046d,
2596 .idProduct = 0x08c5,
2597 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2598 .bInterfaceSubClass = 1,
2599 .bInterfaceProtocol = 0 },
2600 /* Logitech Quickcam OEM Dell Notebook */
2601 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2602 | USB_DEVICE_ID_MATCH_INT_INFO,
2603 .idVendor = 0x046d,
2604 .idProduct = 0x08c6,
2605 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2606 .bInterfaceSubClass = 1,
2607 .bInterfaceProtocol = 0 },
2608 /* Logitech Quickcam OEM Cisco VT Camera II */
2609 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2610 | USB_DEVICE_ID_MATCH_INT_INFO,
2611 .idVendor = 0x046d,
2612 .idProduct = 0x08c7,
2613 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2614 .bInterfaceSubClass = 1,
2615 .bInterfaceProtocol = 0 },
2616 /* Logitech HD Pro Webcam C920 */
2617 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2618 | USB_DEVICE_ID_MATCH_INT_INFO,
2619 .idVendor = 0x046d,
2620 .idProduct = 0x082d,
2621 .bInterfaceClass = USB_CLASS_VIDEO,
2622 .bInterfaceSubClass = 1,
2623 .bInterfaceProtocol = 0,
2624 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
2625 /* Chicony CNF7129 (Asus EEE 100HE) */
2626 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2627 | USB_DEVICE_ID_MATCH_INT_INFO,
2628 .idVendor = 0x04f2,
2629 .idProduct = 0xb071,
2630 .bInterfaceClass = USB_CLASS_VIDEO,
2631 .bInterfaceSubClass = 1,
2632 .bInterfaceProtocol = 0,
2633 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) },
2634 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2635 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2636 | USB_DEVICE_ID_MATCH_INT_INFO,
2637 .idVendor = 0x058f,
2638 .idProduct = 0x3820,
2639 .bInterfaceClass = USB_CLASS_VIDEO,
2640 .bInterfaceSubClass = 1,
2641 .bInterfaceProtocol = 0,
2642 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2643 /* Dell XPS m1530 */
2644 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2645 | USB_DEVICE_ID_MATCH_INT_INFO,
2646 .idVendor = 0x05a9,
2647 .idProduct = 0x2640,
2648 .bInterfaceClass = USB_CLASS_VIDEO,
2649 .bInterfaceSubClass = 1,
2650 .bInterfaceProtocol = 0,
2651 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2652 /* Dell SP2008WFP Monitor */
2653 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2654 | USB_DEVICE_ID_MATCH_INT_INFO,
2655 .idVendor = 0x05a9,
2656 .idProduct = 0x2641,
2657 .bInterfaceClass = USB_CLASS_VIDEO,
2658 .bInterfaceSubClass = 1,
2659 .bInterfaceProtocol = 0,
2660 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2661 /* Dell Alienware X51 */
2662 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2663 | USB_DEVICE_ID_MATCH_INT_INFO,
2664 .idVendor = 0x05a9,
2665 .idProduct = 0x2643,
2666 .bInterfaceClass = USB_CLASS_VIDEO,
2667 .bInterfaceSubClass = 1,
2668 .bInterfaceProtocol = 0,
2669 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2670 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2671 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2672 | USB_DEVICE_ID_MATCH_INT_INFO,
2673 .idVendor = 0x05a9,
2674 .idProduct = 0x264a,
2675 .bInterfaceClass = USB_CLASS_VIDEO,
2676 .bInterfaceSubClass = 1,
2677 .bInterfaceProtocol = 0,
2678 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2679 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2680 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2681 | USB_DEVICE_ID_MATCH_INT_INFO,
2682 .idVendor = 0x05a9,
2683 .idProduct = 0x7670,
2684 .bInterfaceClass = USB_CLASS_VIDEO,
2685 .bInterfaceSubClass = 1,
2686 .bInterfaceProtocol = 0,
2687 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2688 /* Apple Built-In iSight */
2689 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2690 | USB_DEVICE_ID_MATCH_INT_INFO,
2691 .idVendor = 0x05ac,
2692 .idProduct = 0x8501,
2693 .bInterfaceClass = USB_CLASS_VIDEO,
2694 .bInterfaceSubClass = 1,
2695 .bInterfaceProtocol = 0,
2696 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2697 | UVC_QUIRK_BUILTIN_ISIGHT) },
2698 /* Apple Built-In iSight via iBridge */
2699 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2700 | USB_DEVICE_ID_MATCH_INT_INFO,
2701 .idVendor = 0x05ac,
2702 .idProduct = 0x8600,
2703 .bInterfaceClass = USB_CLASS_VIDEO,
2704 .bInterfaceSubClass = 1,
2705 .bInterfaceProtocol = 0,
2706 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2707 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2708 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2709 | USB_DEVICE_ID_MATCH_INT_INFO,
2710 .idVendor = 0x05c8,
2711 .idProduct = 0x0403,
2712 .bInterfaceClass = USB_CLASS_VIDEO,
2713 .bInterfaceSubClass = 1,
2714 .bInterfaceProtocol = 0,
2715 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2716 /* Genesys Logic USB 2.0 PC Camera */
2717 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2718 | USB_DEVICE_ID_MATCH_INT_INFO,
2719 .idVendor = 0x05e3,
2720 .idProduct = 0x0505,
2721 .bInterfaceClass = USB_CLASS_VIDEO,
2722 .bInterfaceSubClass = 1,
2723 .bInterfaceProtocol = 0,
2724 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2725 /* Hercules Classic Silver */
2726 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2727 | USB_DEVICE_ID_MATCH_INT_INFO,
2728 .idVendor = 0x06f8,
2729 .idProduct = 0x300c,
2730 .bInterfaceClass = USB_CLASS_VIDEO,
2731 .bInterfaceSubClass = 1,
2732 .bInterfaceProtocol = 0,
2733 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2734 /* ViMicro Vega */
2735 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2736 | USB_DEVICE_ID_MATCH_INT_INFO,
2737 .idVendor = 0x0ac8,
2738 .idProduct = 0x332d,
2739 .bInterfaceClass = USB_CLASS_VIDEO,
2740 .bInterfaceSubClass = 1,
2741 .bInterfaceProtocol = 0,
2742 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2743 /* ViMicro - Minoru3D */
2744 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2745 | USB_DEVICE_ID_MATCH_INT_INFO,
2746 .idVendor = 0x0ac8,
2747 .idProduct = 0x3410,
2748 .bInterfaceClass = USB_CLASS_VIDEO,
2749 .bInterfaceSubClass = 1,
2750 .bInterfaceProtocol = 0,
2751 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2752 /* ViMicro Venus - Minoru3D */
2753 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2754 | USB_DEVICE_ID_MATCH_INT_INFO,
2755 .idVendor = 0x0ac8,
2756 .idProduct = 0x3420,
2757 .bInterfaceClass = USB_CLASS_VIDEO,
2758 .bInterfaceSubClass = 1,
2759 .bInterfaceProtocol = 0,
2760 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2761 /* Ophir Optronics - SPCAM 620U */
2762 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2763 | USB_DEVICE_ID_MATCH_INT_INFO,
2764 .idVendor = 0x0bd3,
2765 .idProduct = 0x0555,
2766 .bInterfaceClass = USB_CLASS_VIDEO,
2767 .bInterfaceSubClass = 1,
2768 .bInterfaceProtocol = 0,
2769 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2770 /* MT6227 */
2771 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2772 | USB_DEVICE_ID_MATCH_INT_INFO,
2773 .idVendor = 0x0e8d,
2774 .idProduct = 0x0004,
2775 .bInterfaceClass = USB_CLASS_VIDEO,
2776 .bInterfaceSubClass = 1,
2777 .bInterfaceProtocol = 0,
2778 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2779 | UVC_QUIRK_PROBE_DEF) },
2780 /* IMC Networks (Medion Akoya) */
2781 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2782 | USB_DEVICE_ID_MATCH_INT_INFO,
2783 .idVendor = 0x13d3,
2784 .idProduct = 0x5103,
2785 .bInterfaceClass = USB_CLASS_VIDEO,
2786 .bInterfaceSubClass = 1,
2787 .bInterfaceProtocol = 0,
2788 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2789 /* JMicron USB2.0 XGA WebCam */
2790 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2791 | USB_DEVICE_ID_MATCH_INT_INFO,
2792 .idVendor = 0x152d,
2793 .idProduct = 0x0310,
2794 .bInterfaceClass = USB_CLASS_VIDEO,
2795 .bInterfaceSubClass = 1,
2796 .bInterfaceProtocol = 0,
2797 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2798 /* Syntek (HP Spartan) */
2799 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2800 | USB_DEVICE_ID_MATCH_INT_INFO,
2801 .idVendor = 0x174f,
2802 .idProduct = 0x5212,
2803 .bInterfaceClass = USB_CLASS_VIDEO,
2804 .bInterfaceSubClass = 1,
2805 .bInterfaceProtocol = 0,
2806 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2807 /* Syntek (Samsung Q310) */
2808 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2809 | USB_DEVICE_ID_MATCH_INT_INFO,
2810 .idVendor = 0x174f,
2811 .idProduct = 0x5931,
2812 .bInterfaceClass = USB_CLASS_VIDEO,
2813 .bInterfaceSubClass = 1,
2814 .bInterfaceProtocol = 0,
2815 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2816 /* Syntek (Packard Bell EasyNote MX52 */
2817 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2818 | USB_DEVICE_ID_MATCH_INT_INFO,
2819 .idVendor = 0x174f,
2820 .idProduct = 0x8a12,
2821 .bInterfaceClass = USB_CLASS_VIDEO,
2822 .bInterfaceSubClass = 1,
2823 .bInterfaceProtocol = 0,
2824 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2825 /* Syntek (Asus F9SG) */
2826 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2827 | USB_DEVICE_ID_MATCH_INT_INFO,
2828 .idVendor = 0x174f,
2829 .idProduct = 0x8a31,
2830 .bInterfaceClass = USB_CLASS_VIDEO,
2831 .bInterfaceSubClass = 1,
2832 .bInterfaceProtocol = 0,
2833 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2834 /* Syntek (Asus U3S) */
2835 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2836 | USB_DEVICE_ID_MATCH_INT_INFO,
2837 .idVendor = 0x174f,
2838 .idProduct = 0x8a33,
2839 .bInterfaceClass = USB_CLASS_VIDEO,
2840 .bInterfaceSubClass = 1,
2841 .bInterfaceProtocol = 0,
2842 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2843 /* Syntek (JAOtech Smart Terminal) */
2844 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2845 | USB_DEVICE_ID_MATCH_INT_INFO,
2846 .idVendor = 0x174f,
2847 .idProduct = 0x8a34,
2848 .bInterfaceClass = USB_CLASS_VIDEO,
2849 .bInterfaceSubClass = 1,
2850 .bInterfaceProtocol = 0,
2851 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2852 /* Miricle 307K */
2853 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2854 | USB_DEVICE_ID_MATCH_INT_INFO,
2855 .idVendor = 0x17dc,
2856 .idProduct = 0x0202,
2857 .bInterfaceClass = USB_CLASS_VIDEO,
2858 .bInterfaceSubClass = 1,
2859 .bInterfaceProtocol = 0,
2860 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2861 /* Lenovo Thinkpad SL400/SL500 */
2862 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2863 | USB_DEVICE_ID_MATCH_INT_INFO,
2864 .idVendor = 0x17ef,
2865 .idProduct = 0x480b,
2866 .bInterfaceClass = USB_CLASS_VIDEO,
2867 .bInterfaceSubClass = 1,
2868 .bInterfaceProtocol = 0,
2869 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2870 /* Aveo Technology USB 2.0 Camera */
2871 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2872 | USB_DEVICE_ID_MATCH_INT_INFO,
2873 .idVendor = 0x1871,
2874 .idProduct = 0x0306,
2875 .bInterfaceClass = USB_CLASS_VIDEO,
2876 .bInterfaceSubClass = 1,
2877 .bInterfaceProtocol = 0,
2878 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2879 | UVC_QUIRK_PROBE_EXTRAFIELDS) },
2880 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2881 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2882 | USB_DEVICE_ID_MATCH_INT_INFO,
2883 .idVendor = 0x1871,
2884 .idProduct = 0x0516,
2885 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2886 .bInterfaceSubClass = 1,
2887 .bInterfaceProtocol = 0 },
2888 /* Ecamm Pico iMage */
2889 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2890 | USB_DEVICE_ID_MATCH_INT_INFO,
2891 .idVendor = 0x18cd,
2892 .idProduct = 0xcafe,
2893 .bInterfaceClass = USB_CLASS_VIDEO,
2894 .bInterfaceSubClass = 1,
2895 .bInterfaceProtocol = 0,
2896 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) },
2897 /* Manta MM-353 Plako */
2898 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2899 | USB_DEVICE_ID_MATCH_INT_INFO,
2900 .idVendor = 0x18ec,
2901 .idProduct = 0x3188,
2902 .bInterfaceClass = USB_CLASS_VIDEO,
2903 .bInterfaceSubClass = 1,
2904 .bInterfaceProtocol = 0,
2905 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2906 /* FSC WebCam V30S */
2907 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2908 | USB_DEVICE_ID_MATCH_INT_INFO,
2909 .idVendor = 0x18ec,
2910 .idProduct = 0x3288,
2911 .bInterfaceClass = USB_CLASS_VIDEO,
2912 .bInterfaceSubClass = 1,
2913 .bInterfaceProtocol = 0,
2914 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2915 /* Arkmicro unbranded */
2916 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2917 | USB_DEVICE_ID_MATCH_INT_INFO,
2918 .idVendor = 0x18ec,
2919 .idProduct = 0x3290,
2920 .bInterfaceClass = USB_CLASS_VIDEO,
2921 .bInterfaceSubClass = 1,
2922 .bInterfaceProtocol = 0,
2923 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2924 /* The Imaging Source USB CCD cameras */
2925 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2926 | USB_DEVICE_ID_MATCH_INT_INFO,
2927 .idVendor = 0x199e,
2928 .idProduct = 0x8102,
2929 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2930 .bInterfaceSubClass = 1,
2931 .bInterfaceProtocol = 0 },
2932 /* Bodelin ProScopeHR */
2933 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2934 | USB_DEVICE_ID_MATCH_DEV_HI
2935 | USB_DEVICE_ID_MATCH_INT_INFO,
2936 .idVendor = 0x19ab,
2937 .idProduct = 0x1000,
2938 .bcdDevice_hi = 0x0126,
2939 .bInterfaceClass = USB_CLASS_VIDEO,
2940 .bInterfaceSubClass = 1,
2941 .bInterfaceProtocol = 0,
2942 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) },
2943 /* MSI StarCam 370i */
2944 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2945 | USB_DEVICE_ID_MATCH_INT_INFO,
2946 .idVendor = 0x1b3b,
2947 .idProduct = 0x2951,
2948 .bInterfaceClass = USB_CLASS_VIDEO,
2949 .bInterfaceSubClass = 1,
2950 .bInterfaceProtocol = 0,
2951 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2952 /* Generalplus Technology Inc. 808 Camera */
2953 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2954 | USB_DEVICE_ID_MATCH_INT_INFO,
2955 .idVendor = 0x1b3f,
2956 .idProduct = 0x2002,
2957 .bInterfaceClass = USB_CLASS_VIDEO,
2958 .bInterfaceSubClass = 1,
2959 .bInterfaceProtocol = 0,
2960 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2961 /* SiGma Micro USB Web Camera */
2962 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2963 | USB_DEVICE_ID_MATCH_INT_INFO,
2964 .idVendor = 0x1c4f,
2965 .idProduct = 0x3000,
2966 .bInterfaceClass = USB_CLASS_VIDEO,
2967 .bInterfaceSubClass = 1,
2968 .bInterfaceProtocol = 0,
2969 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2970 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
2971 /* Oculus VR Positional Tracker DK2 */
2972 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2973 | USB_DEVICE_ID_MATCH_INT_INFO,
2974 .idVendor = 0x2833,
2975 .idProduct = 0x0201,
2976 .bInterfaceClass = USB_CLASS_VIDEO,
2977 .bInterfaceSubClass = 1,
2978 .bInterfaceProtocol = 0,
2979 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2980 /* Oculus VR Rift Sensor */
2981 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2982 | USB_DEVICE_ID_MATCH_INT_INFO,
2983 .idVendor = 0x2833,
2984 .idProduct = 0x0211,
2985 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2986 .bInterfaceSubClass = 1,
2987 .bInterfaceProtocol = 0,
2988 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2989 /* GEO Semiconductor GC6500 */
2990 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2991 | USB_DEVICE_ID_MATCH_INT_INFO,
2992 .idVendor = 0x29fe,
2993 .idProduct = 0x4d53,
2994 .bInterfaceClass = USB_CLASS_VIDEO,
2995 .bInterfaceSubClass = 1,
2996 .bInterfaceProtocol = 0,
2997 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) },
2998 /* Intel RealSense D4M */
2999 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3000 | USB_DEVICE_ID_MATCH_INT_INFO,
3001 .idVendor = 0x8086,
3002 .idProduct = 0x0b03,
3003 .bInterfaceClass = USB_CLASS_VIDEO,
3004 .bInterfaceSubClass = 1,
3005 .bInterfaceProtocol = 0,
3006 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) },
3007 /* Generic USB Video Class */
3008 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
3009 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
3010 {}
3011 };
3012
3013 MODULE_DEVICE_TABLE(usb, uvc_ids);
3014
3015 struct uvc_driver uvc_driver = {
3016 .driver = {
3017 .name = "uvcvideo",
3018 .probe = uvc_probe,
3019 .disconnect = uvc_disconnect,
3020 .suspend = uvc_suspend,
3021 .resume = uvc_resume,
3022 .reset_resume = uvc_reset_resume,
3023 .id_table = uvc_ids,
3024 .supports_autosuspend = 1,
3025 },
3026 };
3027
uvc_init(void)3028 static int __init uvc_init(void)
3029 {
3030 int ret;
3031
3032 uvc_debugfs_init();
3033
3034 ret = usb_register(&uvc_driver.driver);
3035 if (ret < 0) {
3036 uvc_debugfs_cleanup();
3037 return ret;
3038 }
3039
3040 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
3041 return 0;
3042 }
3043
uvc_cleanup(void)3044 static void __exit uvc_cleanup(void)
3045 {
3046 usb_deregister(&uvc_driver.driver);
3047 uvc_debugfs_cleanup();
3048 }
3049
3050 module_init(uvc_init);
3051 module_exit(uvc_cleanup);
3052
3053 MODULE_AUTHOR(DRIVER_AUTHOR);
3054 MODULE_DESCRIPTION(DRIVER_DESC);
3055 MODULE_LICENSE("GPL");
3056 MODULE_VERSION(DRIVER_VERSION);
3057
3058