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/gpio/consumer.h>
11 #include <linux/kernel.h>
12 #include <linux/list.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/usb.h>
16 #include <linux/videodev2.h>
17 #include <linux/vmalloc.h>
18 #include <linux/wait.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_dbg_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_dbg(dev, DESCR,
523 "device %d videostreaming 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 dev_info(&streaming->intf->dev,
538 "Unknown video format %pUl\n", &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_dbg(dev, DESCR,
587 "device %d videostreaming 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_dbg(dev, DESCR,
603 "device %d videostreaming 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_dbg(dev, DESCR,
621 "device %d videostreaming 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_dbg(dev, DESCR,
650 "device %d videostreaming interface %d unsupported format %u\n",
651 dev->udev->devnum, alts->desc.bInterfaceNumber,
652 buffer[2]);
653 return -EINVAL;
654 }
655
656 uvc_dbg(dev, 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_dbg(dev, DESCR,
676 "device %d videostreaming interface %d FRAME error\n",
677 dev->udev->devnum,
678 alts->desc.bInterfaceNumber);
679 return -EINVAL;
680 }
681
682 frame->bFrameIndex = buffer[3];
683 frame->bmCapabilities = buffer[4];
684 frame->wWidth = get_unaligned_le16(&buffer[5])
685 * width_multiplier;
686 frame->wHeight = get_unaligned_le16(&buffer[7]);
687 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
688 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
689 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
690 frame->dwMaxVideoFrameBufferSize =
691 get_unaligned_le32(&buffer[17]);
692 frame->dwDefaultFrameInterval =
693 get_unaligned_le32(&buffer[21]);
694 frame->bFrameIntervalType = buffer[25];
695 } else {
696 frame->dwMaxVideoFrameBufferSize = 0;
697 frame->dwDefaultFrameInterval =
698 get_unaligned_le32(&buffer[17]);
699 frame->bFrameIntervalType = buffer[21];
700 }
701 frame->dwFrameInterval = *intervals;
702
703 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
704 * completely. Observed behaviours range from setting the
705 * value to 1.1x the actual frame size to hardwiring the
706 * 16 low bits to 0. This results in a higher than necessary
707 * memory usage as well as a wrong image size information. For
708 * uncompressed formats this can be fixed by computing the
709 * value from the frame size.
710 */
711 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
712 frame->dwMaxVideoFrameBufferSize = format->bpp
713 * frame->wWidth * frame->wHeight / 8;
714
715 /* Some bogus devices report dwMinFrameInterval equal to
716 * dwMaxFrameInterval and have dwFrameIntervalStep set to
717 * zero. Setting all null intervals to 1 fixes the problem and
718 * some other divisions by zero that could happen.
719 */
720 for (i = 0; i < n; ++i) {
721 interval = get_unaligned_le32(&buffer[26+4*i]);
722 *(*intervals)++ = interval ? interval : 1;
723 }
724
725 /* Make sure that the default frame interval stays between
726 * the boundaries.
727 */
728 n -= frame->bFrameIntervalType ? 1 : 2;
729 frame->dwDefaultFrameInterval =
730 min(frame->dwFrameInterval[n],
731 max(frame->dwFrameInterval[0],
732 frame->dwDefaultFrameInterval));
733
734 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
735 frame->bFrameIntervalType = 1;
736 frame->dwFrameInterval[0] =
737 frame->dwDefaultFrameInterval;
738 }
739
740 uvc_dbg(dev, DESCR, "- %ux%u (%u.%u fps)\n",
741 frame->wWidth, frame->wHeight,
742 10000000 / frame->dwDefaultFrameInterval,
743 (100000000 / frame->dwDefaultFrameInterval) % 10);
744
745 format->nframes++;
746 buflen -= buffer[0];
747 buffer += buffer[0];
748 }
749
750 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
751 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
752 buflen -= buffer[0];
753 buffer += buffer[0];
754 }
755
756 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
757 buffer[2] == UVC_VS_COLORFORMAT) {
758 if (buflen < 6) {
759 uvc_dbg(dev, DESCR,
760 "device %d videostreaming interface %d COLORFORMAT error\n",
761 dev->udev->devnum,
762 alts->desc.bInterfaceNumber);
763 return -EINVAL;
764 }
765
766 format->colorspace = uvc_colorspace(buffer[3]);
767 format->xfer_func = uvc_xfer_func(buffer[4]);
768 format->ycbcr_enc = uvc_ycbcr_enc(buffer[5]);
769
770 buflen -= buffer[0];
771 buffer += buffer[0];
772 }
773
774 return buffer - start;
775 }
776
uvc_parse_streaming(struct uvc_device * dev,struct usb_interface * intf)777 static int uvc_parse_streaming(struct uvc_device *dev,
778 struct usb_interface *intf)
779 {
780 struct uvc_streaming *streaming = NULL;
781 struct uvc_format *format;
782 struct uvc_frame *frame;
783 struct usb_host_interface *alts = &intf->altsetting[0];
784 unsigned char *_buffer, *buffer = alts->extra;
785 int _buflen, buflen = alts->extralen;
786 unsigned int nformats = 0, nframes = 0, nintervals = 0;
787 unsigned int size, i, n, p;
788 u32 *interval;
789 u16 psize;
790 int ret = -EINVAL;
791
792 if (intf->cur_altsetting->desc.bInterfaceSubClass
793 != UVC_SC_VIDEOSTREAMING) {
794 uvc_dbg(dev, DESCR,
795 "device %d interface %d isn't a video streaming interface\n",
796 dev->udev->devnum,
797 intf->altsetting[0].desc.bInterfaceNumber);
798 return -EINVAL;
799 }
800
801 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
802 uvc_dbg(dev, DESCR,
803 "device %d interface %d is already claimed\n",
804 dev->udev->devnum,
805 intf->altsetting[0].desc.bInterfaceNumber);
806 return -EINVAL;
807 }
808
809 streaming = uvc_stream_new(dev, intf);
810 if (streaming == NULL) {
811 usb_driver_release_interface(&uvc_driver.driver, intf);
812 return -ENOMEM;
813 }
814
815 /* The Pico iMage webcam has its class-specific interface descriptors
816 * after the endpoint descriptors.
817 */
818 if (buflen == 0) {
819 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
820 struct usb_host_endpoint *ep = &alts->endpoint[i];
821
822 if (ep->extralen == 0)
823 continue;
824
825 if (ep->extralen > 2 &&
826 ep->extra[1] == USB_DT_CS_INTERFACE) {
827 uvc_dbg(dev, DESCR,
828 "trying extra data from endpoint %u\n",
829 i);
830 buffer = alts->endpoint[i].extra;
831 buflen = alts->endpoint[i].extralen;
832 break;
833 }
834 }
835 }
836
837 /* Skip the standard interface descriptors. */
838 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
839 buflen -= buffer[0];
840 buffer += buffer[0];
841 }
842
843 if (buflen <= 2) {
844 uvc_dbg(dev, DESCR,
845 "no class-specific streaming interface descriptors found\n");
846 goto error;
847 }
848
849 /* Parse the header descriptor. */
850 switch (buffer[2]) {
851 case UVC_VS_OUTPUT_HEADER:
852 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
853 size = 9;
854 break;
855
856 case UVC_VS_INPUT_HEADER:
857 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
858 size = 13;
859 break;
860
861 default:
862 uvc_dbg(dev, DESCR,
863 "device %d videostreaming interface %d HEADER descriptor not found\n",
864 dev->udev->devnum, alts->desc.bInterfaceNumber);
865 goto error;
866 }
867
868 p = buflen >= 4 ? buffer[3] : 0;
869 n = buflen >= size ? buffer[size-1] : 0;
870
871 if (buflen < size + p*n) {
872 uvc_dbg(dev, DESCR,
873 "device %d videostreaming interface %d HEADER descriptor is invalid\n",
874 dev->udev->devnum, alts->desc.bInterfaceNumber);
875 goto error;
876 }
877
878 streaming->header.bNumFormats = p;
879 streaming->header.bEndpointAddress = buffer[6];
880 if (buffer[2] == UVC_VS_INPUT_HEADER) {
881 streaming->header.bmInfo = buffer[7];
882 streaming->header.bTerminalLink = buffer[8];
883 streaming->header.bStillCaptureMethod = buffer[9];
884 streaming->header.bTriggerSupport = buffer[10];
885 streaming->header.bTriggerUsage = buffer[11];
886 } else {
887 streaming->header.bTerminalLink = buffer[7];
888 }
889 streaming->header.bControlSize = n;
890
891 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
892 GFP_KERNEL);
893 if (streaming->header.bmaControls == NULL) {
894 ret = -ENOMEM;
895 goto error;
896 }
897
898 buflen -= buffer[0];
899 buffer += buffer[0];
900
901 _buffer = buffer;
902 _buflen = buflen;
903
904 /* Count the format and frame descriptors. */
905 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
906 switch (_buffer[2]) {
907 case UVC_VS_FORMAT_UNCOMPRESSED:
908 case UVC_VS_FORMAT_MJPEG:
909 case UVC_VS_FORMAT_FRAME_BASED:
910 nformats++;
911 break;
912
913 case UVC_VS_FORMAT_DV:
914 /* DV format has no frame descriptor. We will create a
915 * dummy frame descriptor with a dummy frame interval.
916 */
917 nformats++;
918 nframes++;
919 nintervals++;
920 break;
921
922 case UVC_VS_FORMAT_MPEG2TS:
923 case UVC_VS_FORMAT_STREAM_BASED:
924 uvc_dbg(dev, DESCR,
925 "device %d videostreaming interface %d FORMAT %u is not supported\n",
926 dev->udev->devnum,
927 alts->desc.bInterfaceNumber, _buffer[2]);
928 break;
929
930 case UVC_VS_FRAME_UNCOMPRESSED:
931 case UVC_VS_FRAME_MJPEG:
932 nframes++;
933 if (_buflen > 25)
934 nintervals += _buffer[25] ? _buffer[25] : 3;
935 break;
936
937 case UVC_VS_FRAME_FRAME_BASED:
938 nframes++;
939 if (_buflen > 21)
940 nintervals += _buffer[21] ? _buffer[21] : 3;
941 break;
942 }
943
944 _buflen -= _buffer[0];
945 _buffer += _buffer[0];
946 }
947
948 if (nformats == 0) {
949 uvc_dbg(dev, DESCR,
950 "device %d videostreaming interface %d has no supported formats defined\n",
951 dev->udev->devnum, alts->desc.bInterfaceNumber);
952 goto error;
953 }
954
955 size = nformats * sizeof(*format) + nframes * sizeof(*frame)
956 + nintervals * sizeof(*interval);
957 format = kzalloc(size, GFP_KERNEL);
958 if (format == NULL) {
959 ret = -ENOMEM;
960 goto error;
961 }
962
963 frame = (struct uvc_frame *)&format[nformats];
964 interval = (u32 *)&frame[nframes];
965
966 streaming->format = format;
967 streaming->nformats = nformats;
968
969 /* Parse the format descriptors. */
970 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
971 switch (buffer[2]) {
972 case UVC_VS_FORMAT_UNCOMPRESSED:
973 case UVC_VS_FORMAT_MJPEG:
974 case UVC_VS_FORMAT_DV:
975 case UVC_VS_FORMAT_FRAME_BASED:
976 format->frame = frame;
977 ret = uvc_parse_format(dev, streaming, format,
978 &interval, buffer, buflen);
979 if (ret < 0)
980 goto error;
981
982 frame += format->nframes;
983 format++;
984
985 buflen -= ret;
986 buffer += ret;
987 continue;
988
989 default:
990 break;
991 }
992
993 buflen -= buffer[0];
994 buffer += buffer[0];
995 }
996
997 if (buflen)
998 uvc_dbg(dev, DESCR,
999 "device %d videostreaming interface %d has %u bytes of trailing descriptor garbage\n",
1000 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
1001
1002 /* Parse the alternate settings to find the maximum bandwidth. */
1003 for (i = 0; i < intf->num_altsetting; ++i) {
1004 struct usb_host_endpoint *ep;
1005 alts = &intf->altsetting[i];
1006 ep = uvc_find_endpoint(alts,
1007 streaming->header.bEndpointAddress);
1008 if (ep == NULL)
1009 continue;
1010
1011 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
1012 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
1013 if (psize > streaming->maxpsize)
1014 streaming->maxpsize = psize;
1015 }
1016
1017 list_add_tail(&streaming->list, &dev->streams);
1018 return 0;
1019
1020 error:
1021 usb_driver_release_interface(&uvc_driver.driver, intf);
1022 uvc_stream_delete(streaming);
1023 return ret;
1024 }
1025
1026 static const u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA;
1027 static const u8 uvc_gpio_guid[16] = UVC_GUID_EXT_GPIO_CONTROLLER;
1028 static const u8 uvc_media_transport_input_guid[16] =
1029 UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
1030 static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
1031
uvc_alloc_entity(u16 type,u16 id,unsigned int num_pads,unsigned int extra_size)1032 static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
1033 unsigned int num_pads, unsigned int extra_size)
1034 {
1035 struct uvc_entity *entity;
1036 unsigned int num_inputs;
1037 unsigned int size;
1038 unsigned int i;
1039
1040 extra_size = roundup(extra_size, sizeof(*entity->pads));
1041 if (num_pads)
1042 num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
1043 else
1044 num_inputs = 0;
1045 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
1046 + num_inputs;
1047 entity = kzalloc(size, GFP_KERNEL);
1048 if (entity == NULL)
1049 return NULL;
1050
1051 entity->id = id;
1052 entity->type = type;
1053
1054 /*
1055 * Set the GUID for standard entity types. For extension units, the GUID
1056 * is initialized by the caller.
1057 */
1058 switch (type) {
1059 case UVC_EXT_GPIO_UNIT:
1060 memcpy(entity->guid, uvc_gpio_guid, 16);
1061 break;
1062 case UVC_ITT_CAMERA:
1063 memcpy(entity->guid, uvc_camera_guid, 16);
1064 break;
1065 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1066 memcpy(entity->guid, uvc_media_transport_input_guid, 16);
1067 break;
1068 case UVC_VC_PROCESSING_UNIT:
1069 memcpy(entity->guid, uvc_processing_guid, 16);
1070 break;
1071 }
1072
1073 entity->num_links = 0;
1074 entity->num_pads = num_pads;
1075 entity->pads = ((void *)(entity + 1)) + extra_size;
1076
1077 for (i = 0; i < num_inputs; ++i)
1078 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
1079 if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
1080 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
1081
1082 entity->bNrInPins = num_inputs;
1083 entity->baSourceID = (u8 *)(&entity->pads[num_pads]);
1084
1085 return entity;
1086 }
1087
1088 /* Parse vendor-specific extensions. */
uvc_parse_vendor_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)1089 static int uvc_parse_vendor_control(struct uvc_device *dev,
1090 const unsigned char *buffer, int buflen)
1091 {
1092 struct usb_device *udev = dev->udev;
1093 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1094 struct uvc_entity *unit;
1095 unsigned int n, p;
1096 int handled = 0;
1097
1098 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
1099 case 0x046d: /* Logitech */
1100 if (buffer[1] != 0x41 || buffer[2] != 0x01)
1101 break;
1102
1103 /* Logitech implements several vendor specific functions
1104 * through vendor specific extension units (LXU).
1105 *
1106 * The LXU descriptors are similar to XU descriptors
1107 * (see "USB Device Video Class for Video Devices", section
1108 * 3.7.2.6 "Extension Unit Descriptor") with the following
1109 * differences:
1110 *
1111 * ----------------------------------------------------------
1112 * 0 bLength 1 Number
1113 * Size of this descriptor, in bytes: 24+p+n*2
1114 * ----------------------------------------------------------
1115 * 23+p+n bmControlsType N Bitmap
1116 * Individual bits in the set are defined:
1117 * 0: Absolute
1118 * 1: Relative
1119 *
1120 * This bitset is mapped exactly the same as bmControls.
1121 * ----------------------------------------------------------
1122 * 23+p+n*2 bReserved 1 Boolean
1123 * ----------------------------------------------------------
1124 * 24+p+n*2 iExtension 1 Index
1125 * Index of a string descriptor that describes this
1126 * extension unit.
1127 * ----------------------------------------------------------
1128 */
1129 p = buflen >= 22 ? buffer[21] : 0;
1130 n = buflen >= 25 + p ? buffer[22+p] : 0;
1131
1132 if (buflen < 25 + p + 2*n) {
1133 uvc_dbg(dev, DESCR,
1134 "device %d videocontrol interface %d EXTENSION_UNIT error\n",
1135 udev->devnum, alts->desc.bInterfaceNumber);
1136 break;
1137 }
1138
1139 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
1140 p + 1, 2*n);
1141 if (unit == NULL)
1142 return -ENOMEM;
1143
1144 memcpy(unit->guid, &buffer[4], 16);
1145 unit->extension.bNumControls = buffer[20];
1146 memcpy(unit->baSourceID, &buffer[22], p);
1147 unit->extension.bControlSize = buffer[22+p];
1148 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1149 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit)
1150 + n;
1151 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
1152
1153 if (buffer[24+p+2*n] != 0)
1154 usb_string(udev, buffer[24+p+2*n], unit->name,
1155 sizeof(unit->name));
1156 else
1157 sprintf(unit->name, "Extension %u", buffer[3]);
1158
1159 list_add_tail(&unit->list, &dev->entities);
1160 handled = 1;
1161 break;
1162 }
1163
1164 return handled;
1165 }
1166
uvc_parse_standard_control(struct uvc_device * dev,const unsigned char * buffer,int buflen)1167 static int uvc_parse_standard_control(struct uvc_device *dev,
1168 const unsigned char *buffer, int buflen)
1169 {
1170 struct usb_device *udev = dev->udev;
1171 struct uvc_entity *unit, *term;
1172 struct usb_interface *intf;
1173 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1174 unsigned int i, n, p, len;
1175 u16 type;
1176
1177 switch (buffer[2]) {
1178 case UVC_VC_HEADER:
1179 n = buflen >= 12 ? buffer[11] : 0;
1180
1181 if (buflen < 12 + n) {
1182 uvc_dbg(dev, DESCR,
1183 "device %d videocontrol interface %d HEADER error\n",
1184 udev->devnum, alts->desc.bInterfaceNumber);
1185 return -EINVAL;
1186 }
1187
1188 dev->uvc_version = get_unaligned_le16(&buffer[3]);
1189 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
1190
1191 /* Parse all USB Video Streaming interfaces. */
1192 for (i = 0; i < n; ++i) {
1193 intf = usb_ifnum_to_if(udev, buffer[12+i]);
1194 if (intf == NULL) {
1195 uvc_dbg(dev, DESCR,
1196 "device %d interface %d doesn't exists\n",
1197 udev->devnum, i);
1198 continue;
1199 }
1200
1201 uvc_parse_streaming(dev, intf);
1202 }
1203 break;
1204
1205 case UVC_VC_INPUT_TERMINAL:
1206 if (buflen < 8) {
1207 uvc_dbg(dev, DESCR,
1208 "device %d videocontrol interface %d INPUT_TERMINAL error\n",
1209 udev->devnum, alts->desc.bInterfaceNumber);
1210 return -EINVAL;
1211 }
1212
1213 /*
1214 * Reject invalid terminal types that would cause issues:
1215 *
1216 * - The high byte must be non-zero, otherwise it would be
1217 * confused with a unit.
1218 *
1219 * - Bit 15 must be 0, as we use it internally as a terminal
1220 * direction flag.
1221 *
1222 * Other unknown types are accepted.
1223 */
1224 type = get_unaligned_le16(&buffer[4]);
1225 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) {
1226 uvc_dbg(dev, DESCR,
1227 "device %d videocontrol interface %d INPUT_TERMINAL %d has invalid type 0x%04x, skipping\n",
1228 udev->devnum, alts->desc.bInterfaceNumber,
1229 buffer[3], type);
1230 return 0;
1231 }
1232
1233 n = 0;
1234 p = 0;
1235 len = 8;
1236
1237 if (type == UVC_ITT_CAMERA) {
1238 n = buflen >= 15 ? buffer[14] : 0;
1239 len = 15;
1240
1241 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1242 n = buflen >= 9 ? buffer[8] : 0;
1243 p = buflen >= 10 + n ? buffer[9+n] : 0;
1244 len = 10;
1245 }
1246
1247 if (buflen < len + n + p) {
1248 uvc_dbg(dev, DESCR,
1249 "device %d videocontrol interface %d INPUT_TERMINAL error\n",
1250 udev->devnum, alts->desc.bInterfaceNumber);
1251 return -EINVAL;
1252 }
1253
1254 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1255 1, n + p);
1256 if (term == NULL)
1257 return -ENOMEM;
1258
1259 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1260 term->camera.bControlSize = n;
1261 term->camera.bmControls = (u8 *)term + sizeof(*term);
1262 term->camera.wObjectiveFocalLengthMin =
1263 get_unaligned_le16(&buffer[8]);
1264 term->camera.wObjectiveFocalLengthMax =
1265 get_unaligned_le16(&buffer[10]);
1266 term->camera.wOcularFocalLength =
1267 get_unaligned_le16(&buffer[12]);
1268 memcpy(term->camera.bmControls, &buffer[15], n);
1269 } else if (UVC_ENTITY_TYPE(term) ==
1270 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1271 term->media.bControlSize = n;
1272 term->media.bmControls = (u8 *)term + sizeof(*term);
1273 term->media.bTransportModeSize = p;
1274 term->media.bmTransportModes = (u8 *)term
1275 + sizeof(*term) + n;
1276 memcpy(term->media.bmControls, &buffer[9], n);
1277 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1278 }
1279
1280 if (buffer[7] != 0)
1281 usb_string(udev, buffer[7], term->name,
1282 sizeof(term->name));
1283 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1284 sprintf(term->name, "Camera %u", buffer[3]);
1285 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1286 sprintf(term->name, "Media %u", buffer[3]);
1287 else
1288 sprintf(term->name, "Input %u", buffer[3]);
1289
1290 list_add_tail(&term->list, &dev->entities);
1291 break;
1292
1293 case UVC_VC_OUTPUT_TERMINAL:
1294 if (buflen < 9) {
1295 uvc_dbg(dev, DESCR,
1296 "device %d videocontrol interface %d OUTPUT_TERMINAL error\n",
1297 udev->devnum, alts->desc.bInterfaceNumber);
1298 return -EINVAL;
1299 }
1300
1301 /* Make sure the terminal type MSB is not null, otherwise it
1302 * could be confused with a unit.
1303 */
1304 type = get_unaligned_le16(&buffer[4]);
1305 if ((type & 0xff00) == 0) {
1306 uvc_dbg(dev, DESCR,
1307 "device %d videocontrol interface %d OUTPUT_TERMINAL %d has invalid type 0x%04x, skipping\n",
1308 udev->devnum, alts->desc.bInterfaceNumber,
1309 buffer[3], type);
1310 return 0;
1311 }
1312
1313 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1314 1, 0);
1315 if (term == NULL)
1316 return -ENOMEM;
1317
1318 memcpy(term->baSourceID, &buffer[7], 1);
1319
1320 if (buffer[8] != 0)
1321 usb_string(udev, buffer[8], term->name,
1322 sizeof(term->name));
1323 else
1324 sprintf(term->name, "Output %u", buffer[3]);
1325
1326 list_add_tail(&term->list, &dev->entities);
1327 break;
1328
1329 case UVC_VC_SELECTOR_UNIT:
1330 p = buflen >= 5 ? buffer[4] : 0;
1331
1332 if (buflen < 5 || buflen < 6 + p) {
1333 uvc_dbg(dev, DESCR,
1334 "device %d videocontrol interface %d SELECTOR_UNIT error\n",
1335 udev->devnum, alts->desc.bInterfaceNumber);
1336 return -EINVAL;
1337 }
1338
1339 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1340 if (unit == NULL)
1341 return -ENOMEM;
1342
1343 memcpy(unit->baSourceID, &buffer[5], p);
1344
1345 if (buffer[5+p] != 0)
1346 usb_string(udev, buffer[5+p], unit->name,
1347 sizeof(unit->name));
1348 else
1349 sprintf(unit->name, "Selector %u", buffer[3]);
1350
1351 list_add_tail(&unit->list, &dev->entities);
1352 break;
1353
1354 case UVC_VC_PROCESSING_UNIT:
1355 n = buflen >= 8 ? buffer[7] : 0;
1356 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1357
1358 if (buflen < p + n) {
1359 uvc_dbg(dev, DESCR,
1360 "device %d videocontrol interface %d PROCESSING_UNIT error\n",
1361 udev->devnum, alts->desc.bInterfaceNumber);
1362 return -EINVAL;
1363 }
1364
1365 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1366 if (unit == NULL)
1367 return -ENOMEM;
1368
1369 memcpy(unit->baSourceID, &buffer[4], 1);
1370 unit->processing.wMaxMultiplier =
1371 get_unaligned_le16(&buffer[5]);
1372 unit->processing.bControlSize = buffer[7];
1373 unit->processing.bmControls = (u8 *)unit + sizeof(*unit);
1374 memcpy(unit->processing.bmControls, &buffer[8], n);
1375 if (dev->uvc_version >= 0x0110)
1376 unit->processing.bmVideoStandards = buffer[9+n];
1377
1378 if (buffer[8+n] != 0)
1379 usb_string(udev, buffer[8+n], unit->name,
1380 sizeof(unit->name));
1381 else
1382 sprintf(unit->name, "Processing %u", buffer[3]);
1383
1384 list_add_tail(&unit->list, &dev->entities);
1385 break;
1386
1387 case UVC_VC_EXTENSION_UNIT:
1388 p = buflen >= 22 ? buffer[21] : 0;
1389 n = buflen >= 24 + p ? buffer[22+p] : 0;
1390
1391 if (buflen < 24 + p + n) {
1392 uvc_dbg(dev, DESCR,
1393 "device %d videocontrol interface %d EXTENSION_UNIT error\n",
1394 udev->devnum, alts->desc.bInterfaceNumber);
1395 return -EINVAL;
1396 }
1397
1398 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1399 if (unit == NULL)
1400 return -ENOMEM;
1401
1402 memcpy(unit->guid, &buffer[4], 16);
1403 unit->extension.bNumControls = buffer[20];
1404 memcpy(unit->baSourceID, &buffer[22], p);
1405 unit->extension.bControlSize = buffer[22+p];
1406 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1407 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1408
1409 if (buffer[23+p+n] != 0)
1410 usb_string(udev, buffer[23+p+n], unit->name,
1411 sizeof(unit->name));
1412 else
1413 sprintf(unit->name, "Extension %u", buffer[3]);
1414
1415 list_add_tail(&unit->list, &dev->entities);
1416 break;
1417
1418 default:
1419 uvc_dbg(dev, DESCR,
1420 "Found an unknown CS_INTERFACE descriptor (%u)\n",
1421 buffer[2]);
1422 break;
1423 }
1424
1425 return 0;
1426 }
1427
uvc_parse_control(struct uvc_device * dev)1428 static int uvc_parse_control(struct uvc_device *dev)
1429 {
1430 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1431 unsigned char *buffer = alts->extra;
1432 int buflen = alts->extralen;
1433 int ret;
1434
1435 /* Parse the default alternate setting only, as the UVC specification
1436 * defines a single alternate setting, the default alternate setting
1437 * zero.
1438 */
1439
1440 while (buflen > 2) {
1441 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1442 buffer[1] != USB_DT_CS_INTERFACE)
1443 goto next_descriptor;
1444
1445 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1446 return ret;
1447
1448 next_descriptor:
1449 buflen -= buffer[0];
1450 buffer += buffer[0];
1451 }
1452
1453 /* Check if the optional status endpoint is present. Built-in iSight
1454 * webcams have an interrupt endpoint but spit proprietary data that
1455 * don't conform to the UVC status endpoint messages. Don't try to
1456 * handle the interrupt endpoint for those cameras.
1457 */
1458 if (alts->desc.bNumEndpoints == 1 &&
1459 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1460 struct usb_host_endpoint *ep = &alts->endpoint[0];
1461 struct usb_endpoint_descriptor *desc = &ep->desc;
1462
1463 if (usb_endpoint_is_int_in(desc) &&
1464 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1465 desc->bInterval != 0) {
1466 uvc_dbg(dev, DESCR,
1467 "Found a Status endpoint (addr %02x)\n",
1468 desc->bEndpointAddress);
1469 dev->int_ep = ep;
1470 }
1471 }
1472
1473 return 0;
1474 }
1475
1476 /* -----------------------------------------------------------------------------
1477 * Privacy GPIO
1478 */
1479
uvc_gpio_event(struct uvc_device * dev)1480 static void uvc_gpio_event(struct uvc_device *dev)
1481 {
1482 struct uvc_entity *unit = dev->gpio_unit;
1483 struct uvc_video_chain *chain;
1484 u8 new_val;
1485
1486 if (!unit)
1487 return;
1488
1489 new_val = gpiod_get_value_cansleep(unit->gpio.gpio_privacy);
1490
1491 /* GPIO entities are always on the first chain. */
1492 chain = list_first_entry(&dev->chains, struct uvc_video_chain, list);
1493 uvc_ctrl_status_event(chain, unit->controls, &new_val);
1494 }
1495
uvc_gpio_get_cur(struct uvc_device * dev,struct uvc_entity * entity,u8 cs,void * data,u16 size)1496 static int uvc_gpio_get_cur(struct uvc_device *dev, struct uvc_entity *entity,
1497 u8 cs, void *data, u16 size)
1498 {
1499 if (cs != UVC_CT_PRIVACY_CONTROL || size < 1)
1500 return -EINVAL;
1501
1502 *(u8 *)data = gpiod_get_value_cansleep(entity->gpio.gpio_privacy);
1503
1504 return 0;
1505 }
1506
uvc_gpio_get_info(struct uvc_device * dev,struct uvc_entity * entity,u8 cs,u8 * caps)1507 static int uvc_gpio_get_info(struct uvc_device *dev, struct uvc_entity *entity,
1508 u8 cs, u8 *caps)
1509 {
1510 if (cs != UVC_CT_PRIVACY_CONTROL)
1511 return -EINVAL;
1512
1513 *caps = UVC_CONTROL_CAP_GET | UVC_CONTROL_CAP_AUTOUPDATE;
1514 return 0;
1515 }
1516
uvc_gpio_irq(int irq,void * data)1517 static irqreturn_t uvc_gpio_irq(int irq, void *data)
1518 {
1519 struct uvc_device *dev = data;
1520
1521 uvc_gpio_event(dev);
1522 return IRQ_HANDLED;
1523 }
1524
uvc_gpio_parse(struct uvc_device * dev)1525 static int uvc_gpio_parse(struct uvc_device *dev)
1526 {
1527 struct uvc_entity *unit;
1528 struct gpio_desc *gpio_privacy;
1529 int irq;
1530
1531 gpio_privacy = devm_gpiod_get_optional(&dev->udev->dev, "privacy",
1532 GPIOD_IN);
1533 if (IS_ERR_OR_NULL(gpio_privacy))
1534 return PTR_ERR_OR_ZERO(gpio_privacy);
1535
1536 unit = uvc_alloc_entity(UVC_EXT_GPIO_UNIT, UVC_EXT_GPIO_UNIT_ID, 0, 1);
1537 if (!unit)
1538 return -ENOMEM;
1539
1540 irq = gpiod_to_irq(gpio_privacy);
1541 if (irq < 0) {
1542 if (irq != EPROBE_DEFER)
1543 dev_err(&dev->udev->dev,
1544 "No IRQ for privacy GPIO (%d)\n", irq);
1545 return irq;
1546 }
1547
1548 unit->gpio.gpio_privacy = gpio_privacy;
1549 unit->gpio.irq = irq;
1550 unit->gpio.bControlSize = 1;
1551 unit->gpio.bmControls = (u8 *)unit + sizeof(*unit);
1552 unit->gpio.bmControls[0] = 1;
1553 unit->get_cur = uvc_gpio_get_cur;
1554 unit->get_info = uvc_gpio_get_info;
1555 strscpy(unit->name, "GPIO", sizeof(unit->name));
1556
1557 list_add_tail(&unit->list, &dev->entities);
1558
1559 dev->gpio_unit = unit;
1560
1561 return 0;
1562 }
1563
uvc_gpio_init_irq(struct uvc_device * dev)1564 static int uvc_gpio_init_irq(struct uvc_device *dev)
1565 {
1566 struct uvc_entity *unit = dev->gpio_unit;
1567
1568 if (!unit || unit->gpio.irq < 0)
1569 return 0;
1570
1571 return devm_request_threaded_irq(&dev->udev->dev, unit->gpio.irq, NULL,
1572 uvc_gpio_irq,
1573 IRQF_ONESHOT | IRQF_TRIGGER_FALLING |
1574 IRQF_TRIGGER_RISING,
1575 "uvc_privacy_gpio", dev);
1576 }
1577
1578 /* ------------------------------------------------------------------------
1579 * UVC device scan
1580 */
1581
1582 /*
1583 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1584 * and containing the following units:
1585 *
1586 * - one or more Output Terminals (USB Streaming or Display)
1587 * - zero or one Processing Unit
1588 * - zero, one or more single-input Selector Units
1589 * - zero or one multiple-input Selector Units, provided all inputs are
1590 * connected to input terminals
1591 * - zero, one or mode single-input Extension Units
1592 * - one or more Input Terminals (Camera, External or USB Streaming)
1593 *
1594 * The terminal and units must match on of the following structures:
1595 *
1596 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1597 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1598 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1599 *
1600 * +---------+ +---------+ -> OTT_*(0)
1601 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1602 * +---------+ +---------+ -> OTT_*(n)
1603 *
1604 * The Processing Unit and Extension Units can be in any order. Additional
1605 * Extension Units connected to the main chain as single-unit branches are
1606 * also supported. Single-input Selector Units are ignored.
1607 */
uvc_scan_chain_entity(struct uvc_video_chain * chain,struct uvc_entity * entity)1608 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1609 struct uvc_entity *entity)
1610 {
1611 switch (UVC_ENTITY_TYPE(entity)) {
1612 case UVC_VC_EXTENSION_UNIT:
1613 uvc_dbg_cont(PROBE, " <- XU %d", entity->id);
1614
1615 if (entity->bNrInPins != 1) {
1616 uvc_dbg(chain->dev, DESCR,
1617 "Extension unit %d has more than 1 input pin\n",
1618 entity->id);
1619 return -1;
1620 }
1621
1622 break;
1623
1624 case UVC_VC_PROCESSING_UNIT:
1625 uvc_dbg_cont(PROBE, " <- PU %d", entity->id);
1626
1627 if (chain->processing != NULL) {
1628 uvc_dbg(chain->dev, DESCR,
1629 "Found multiple Processing Units in chain\n");
1630 return -1;
1631 }
1632
1633 chain->processing = entity;
1634 break;
1635
1636 case UVC_VC_SELECTOR_UNIT:
1637 uvc_dbg_cont(PROBE, " <- SU %d", entity->id);
1638
1639 /* Single-input selector units are ignored. */
1640 if (entity->bNrInPins == 1)
1641 break;
1642
1643 if (chain->selector != NULL) {
1644 uvc_dbg(chain->dev, DESCR,
1645 "Found multiple Selector Units in chain\n");
1646 return -1;
1647 }
1648
1649 chain->selector = entity;
1650 break;
1651
1652 case UVC_ITT_VENDOR_SPECIFIC:
1653 case UVC_ITT_CAMERA:
1654 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1655 uvc_dbg_cont(PROBE, " <- IT %d\n", entity->id);
1656
1657 break;
1658
1659 case UVC_OTT_VENDOR_SPECIFIC:
1660 case UVC_OTT_DISPLAY:
1661 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1662 uvc_dbg_cont(PROBE, " OT %d", entity->id);
1663
1664 break;
1665
1666 case UVC_TT_STREAMING:
1667 if (UVC_ENTITY_IS_ITERM(entity))
1668 uvc_dbg_cont(PROBE, " <- IT %d\n", entity->id);
1669 else
1670 uvc_dbg_cont(PROBE, " OT %d", entity->id);
1671
1672 break;
1673
1674 default:
1675 uvc_dbg(chain->dev, DESCR,
1676 "Unsupported entity type 0x%04x found in chain\n",
1677 UVC_ENTITY_TYPE(entity));
1678 return -1;
1679 }
1680
1681 list_add_tail(&entity->chain, &chain->entities);
1682 return 0;
1683 }
1684
uvc_scan_chain_forward(struct uvc_video_chain * chain,struct uvc_entity * entity,struct uvc_entity * prev)1685 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1686 struct uvc_entity *entity, struct uvc_entity *prev)
1687 {
1688 struct uvc_entity *forward;
1689 int found;
1690
1691 /* Forward scan */
1692 forward = NULL;
1693 found = 0;
1694
1695 while (1) {
1696 forward = uvc_entity_by_reference(chain->dev, entity->id,
1697 forward);
1698 if (forward == NULL)
1699 break;
1700 if (forward == prev)
1701 continue;
1702 if (forward->chain.next || forward->chain.prev) {
1703 uvc_dbg(chain->dev, DESCR,
1704 "Found reference to entity %d already in chain\n",
1705 forward->id);
1706 return -EINVAL;
1707 }
1708
1709 switch (UVC_ENTITY_TYPE(forward)) {
1710 case UVC_VC_EXTENSION_UNIT:
1711 if (forward->bNrInPins != 1) {
1712 uvc_dbg(chain->dev, DESCR,
1713 "Extension unit %d has more than 1 input pin\n",
1714 forward->id);
1715 return -EINVAL;
1716 }
1717
1718 /*
1719 * Some devices reference an output terminal as the
1720 * source of extension units. This is incorrect, as
1721 * output terminals only have an input pin, and thus
1722 * can't be connected to any entity in the forward
1723 * direction. The resulting topology would cause issues
1724 * when registering the media controller graph. To
1725 * avoid this problem, connect the extension unit to
1726 * the source of the output terminal instead.
1727 */
1728 if (UVC_ENTITY_IS_OTERM(entity)) {
1729 struct uvc_entity *source;
1730
1731 source = uvc_entity_by_id(chain->dev,
1732 entity->baSourceID[0]);
1733 if (!source) {
1734 uvc_dbg(chain->dev, DESCR,
1735 "Can't connect extension unit %u in chain\n",
1736 forward->id);
1737 break;
1738 }
1739
1740 forward->baSourceID[0] = source->id;
1741 }
1742
1743 list_add_tail(&forward->chain, &chain->entities);
1744 if (!found)
1745 uvc_dbg_cont(PROBE, " (->");
1746
1747 uvc_dbg_cont(PROBE, " XU %d", forward->id);
1748 found = 1;
1749 break;
1750
1751 case UVC_OTT_VENDOR_SPECIFIC:
1752 case UVC_OTT_DISPLAY:
1753 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1754 case UVC_TT_STREAMING:
1755 if (UVC_ENTITY_IS_ITERM(forward)) {
1756 uvc_dbg(chain->dev, DESCR,
1757 "Unsupported input terminal %u\n",
1758 forward->id);
1759 return -EINVAL;
1760 }
1761
1762 if (UVC_ENTITY_IS_OTERM(entity)) {
1763 uvc_dbg(chain->dev, DESCR,
1764 "Unsupported connection between output terminals %u and %u\n",
1765 entity->id, forward->id);
1766 break;
1767 }
1768
1769 list_add_tail(&forward->chain, &chain->entities);
1770 if (!found)
1771 uvc_dbg_cont(PROBE, " (->");
1772
1773 uvc_dbg_cont(PROBE, " OT %d", forward->id);
1774 found = 1;
1775 break;
1776 }
1777 }
1778 if (found)
1779 uvc_dbg_cont(PROBE, ")");
1780
1781 return 0;
1782 }
1783
uvc_scan_chain_backward(struct uvc_video_chain * chain,struct uvc_entity ** _entity)1784 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1785 struct uvc_entity **_entity)
1786 {
1787 struct uvc_entity *entity = *_entity;
1788 struct uvc_entity *term;
1789 int id = -EINVAL, i;
1790
1791 switch (UVC_ENTITY_TYPE(entity)) {
1792 case UVC_VC_EXTENSION_UNIT:
1793 case UVC_VC_PROCESSING_UNIT:
1794 id = entity->baSourceID[0];
1795 break;
1796
1797 case UVC_VC_SELECTOR_UNIT:
1798 /* Single-input selector units are ignored. */
1799 if (entity->bNrInPins == 1) {
1800 id = entity->baSourceID[0];
1801 break;
1802 }
1803
1804 uvc_dbg_cont(PROBE, " <- IT");
1805
1806 chain->selector = entity;
1807 for (i = 0; i < entity->bNrInPins; ++i) {
1808 id = entity->baSourceID[i];
1809 term = uvc_entity_by_id(chain->dev, id);
1810 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1811 uvc_dbg(chain->dev, DESCR,
1812 "Selector unit %d input %d isn't connected to an input terminal\n",
1813 entity->id, i);
1814 return -1;
1815 }
1816
1817 if (term->chain.next || term->chain.prev) {
1818 uvc_dbg(chain->dev, DESCR,
1819 "Found reference to entity %d already in chain\n",
1820 term->id);
1821 return -EINVAL;
1822 }
1823
1824 uvc_dbg_cont(PROBE, " %d", term->id);
1825
1826 list_add_tail(&term->chain, &chain->entities);
1827 uvc_scan_chain_forward(chain, term, entity);
1828 }
1829
1830 uvc_dbg_cont(PROBE, "\n");
1831
1832 id = 0;
1833 break;
1834
1835 case UVC_ITT_VENDOR_SPECIFIC:
1836 case UVC_ITT_CAMERA:
1837 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1838 case UVC_OTT_VENDOR_SPECIFIC:
1839 case UVC_OTT_DISPLAY:
1840 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1841 case UVC_TT_STREAMING:
1842 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1843 break;
1844 }
1845
1846 if (id <= 0) {
1847 *_entity = NULL;
1848 return id;
1849 }
1850
1851 entity = uvc_entity_by_id(chain->dev, id);
1852 if (entity == NULL) {
1853 uvc_dbg(chain->dev, DESCR,
1854 "Found reference to unknown entity %d\n", id);
1855 return -EINVAL;
1856 }
1857
1858 *_entity = entity;
1859 return 0;
1860 }
1861
uvc_scan_chain(struct uvc_video_chain * chain,struct uvc_entity * term)1862 static int uvc_scan_chain(struct uvc_video_chain *chain,
1863 struct uvc_entity *term)
1864 {
1865 struct uvc_entity *entity, *prev;
1866
1867 uvc_dbg(chain->dev, PROBE, "Scanning UVC chain:");
1868
1869 entity = term;
1870 prev = NULL;
1871
1872 while (entity != NULL) {
1873 /* Entity must not be part of an existing chain */
1874 if (entity->chain.next || entity->chain.prev) {
1875 uvc_dbg(chain->dev, DESCR,
1876 "Found reference to entity %d already in chain\n",
1877 entity->id);
1878 return -EINVAL;
1879 }
1880
1881 /* Process entity */
1882 if (uvc_scan_chain_entity(chain, entity) < 0)
1883 return -EINVAL;
1884
1885 /* Forward scan */
1886 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1887 return -EINVAL;
1888
1889 /* Backward scan */
1890 prev = entity;
1891 if (uvc_scan_chain_backward(chain, &entity) < 0)
1892 return -EINVAL;
1893 }
1894
1895 return 0;
1896 }
1897
uvc_print_terms(struct list_head * terms,u16 dir,char * buffer)1898 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1899 char *buffer)
1900 {
1901 struct uvc_entity *term;
1902 unsigned int nterms = 0;
1903 char *p = buffer;
1904
1905 list_for_each_entry(term, terms, chain) {
1906 if (!UVC_ENTITY_IS_TERM(term) ||
1907 UVC_TERM_DIRECTION(term) != dir)
1908 continue;
1909
1910 if (nterms)
1911 p += sprintf(p, ",");
1912 if (++nterms >= 4) {
1913 p += sprintf(p, "...");
1914 break;
1915 }
1916 p += sprintf(p, "%u", term->id);
1917 }
1918
1919 return p - buffer;
1920 }
1921
uvc_print_chain(struct uvc_video_chain * chain)1922 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1923 {
1924 static char buffer[43];
1925 char *p = buffer;
1926
1927 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1928 p += sprintf(p, " -> ");
1929 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1930
1931 return buffer;
1932 }
1933
uvc_alloc_chain(struct uvc_device * dev)1934 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1935 {
1936 struct uvc_video_chain *chain;
1937
1938 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1939 if (chain == NULL)
1940 return NULL;
1941
1942 INIT_LIST_HEAD(&chain->entities);
1943 mutex_init(&chain->ctrl_mutex);
1944 chain->dev = dev;
1945 v4l2_prio_init(&chain->prio);
1946
1947 return chain;
1948 }
1949
1950 /*
1951 * Fallback heuristic for devices that don't connect units and terminals in a
1952 * valid chain.
1953 *
1954 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1955 * to fail, but if we just take the entities we can find and put them together
1956 * in the most sensible chain we can think of, turns out they do work anyway.
1957 * Note: This heuristic assumes there is a single chain.
1958 *
1959 * At the time of writing, devices known to have such a broken chain are
1960 * - Acer Integrated Camera (5986:055a)
1961 * - Realtek rtl157a7 (0bda:57a7)
1962 */
uvc_scan_fallback(struct uvc_device * dev)1963 static int uvc_scan_fallback(struct uvc_device *dev)
1964 {
1965 struct uvc_video_chain *chain;
1966 struct uvc_entity *iterm = NULL;
1967 struct uvc_entity *oterm = NULL;
1968 struct uvc_entity *entity;
1969 struct uvc_entity *prev;
1970
1971 /*
1972 * Start by locating the input and output terminals. We only support
1973 * devices with exactly one of each for now.
1974 */
1975 list_for_each_entry(entity, &dev->entities, list) {
1976 if (UVC_ENTITY_IS_ITERM(entity)) {
1977 if (iterm)
1978 return -EINVAL;
1979 iterm = entity;
1980 }
1981
1982 if (UVC_ENTITY_IS_OTERM(entity)) {
1983 if (oterm)
1984 return -EINVAL;
1985 oterm = entity;
1986 }
1987 }
1988
1989 if (iterm == NULL || oterm == NULL)
1990 return -EINVAL;
1991
1992 /* Allocate the chain and fill it. */
1993 chain = uvc_alloc_chain(dev);
1994 if (chain == NULL)
1995 return -ENOMEM;
1996
1997 if (uvc_scan_chain_entity(chain, oterm) < 0)
1998 goto error;
1999
2000 prev = oterm;
2001
2002 /*
2003 * Add all Processing and Extension Units with two pads. The order
2004 * doesn't matter much, use reverse list traversal to connect units in
2005 * UVC descriptor order as we build the chain from output to input. This
2006 * leads to units appearing in the order meant by the manufacturer for
2007 * the cameras known to require this heuristic.
2008 */
2009 list_for_each_entry_reverse(entity, &dev->entities, list) {
2010 if (entity->type != UVC_VC_PROCESSING_UNIT &&
2011 entity->type != UVC_VC_EXTENSION_UNIT)
2012 continue;
2013
2014 if (entity->num_pads != 2)
2015 continue;
2016
2017 if (uvc_scan_chain_entity(chain, entity) < 0)
2018 goto error;
2019
2020 prev->baSourceID[0] = entity->id;
2021 prev = entity;
2022 }
2023
2024 if (uvc_scan_chain_entity(chain, iterm) < 0)
2025 goto error;
2026
2027 prev->baSourceID[0] = iterm->id;
2028
2029 list_add_tail(&chain->list, &dev->chains);
2030
2031 uvc_dbg(dev, PROBE, "Found a video chain by fallback heuristic (%s)\n",
2032 uvc_print_chain(chain));
2033
2034 return 0;
2035
2036 error:
2037 kfree(chain);
2038 return -EINVAL;
2039 }
2040
2041 /*
2042 * Scan the device for video chains and register video devices.
2043 *
2044 * Chains are scanned starting at their output terminals and walked backwards.
2045 */
uvc_scan_device(struct uvc_device * dev)2046 static int uvc_scan_device(struct uvc_device *dev)
2047 {
2048 struct uvc_video_chain *chain;
2049 struct uvc_entity *term;
2050
2051 list_for_each_entry(term, &dev->entities, list) {
2052 if (!UVC_ENTITY_IS_OTERM(term))
2053 continue;
2054
2055 /* If the terminal is already included in a chain, skip it.
2056 * This can happen for chains that have multiple output
2057 * terminals, where all output terminals beside the first one
2058 * will be inserted in the chain in forward scans.
2059 */
2060 if (term->chain.next || term->chain.prev)
2061 continue;
2062
2063 chain = uvc_alloc_chain(dev);
2064 if (chain == NULL)
2065 return -ENOMEM;
2066
2067 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
2068
2069 if (uvc_scan_chain(chain, term) < 0) {
2070 kfree(chain);
2071 continue;
2072 }
2073
2074 uvc_dbg(dev, PROBE, "Found a valid video chain (%s)\n",
2075 uvc_print_chain(chain));
2076
2077 list_add_tail(&chain->list, &dev->chains);
2078 }
2079
2080 if (list_empty(&dev->chains))
2081 uvc_scan_fallback(dev);
2082
2083 if (list_empty(&dev->chains)) {
2084 dev_info(&dev->udev->dev, "No valid video chain found.\n");
2085 return -1;
2086 }
2087
2088 /* Add GPIO entity to the first chain. */
2089 if (dev->gpio_unit) {
2090 chain = list_first_entry(&dev->chains,
2091 struct uvc_video_chain, list);
2092 list_add_tail(&dev->gpio_unit->chain, &chain->entities);
2093 }
2094
2095 return 0;
2096 }
2097
2098 /* ------------------------------------------------------------------------
2099 * Video device registration and unregistration
2100 */
2101
2102 /*
2103 * Delete the UVC device.
2104 *
2105 * Called by the kernel when the last reference to the uvc_device structure
2106 * is released.
2107 *
2108 * As this function is called after or during disconnect(), all URBs have
2109 * already been cancelled by the USB core. There is no need to kill the
2110 * interrupt URB manually.
2111 */
uvc_delete(struct kref * kref)2112 static void uvc_delete(struct kref *kref)
2113 {
2114 struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
2115 struct list_head *p, *n;
2116
2117 uvc_status_cleanup(dev);
2118 uvc_ctrl_cleanup_device(dev);
2119
2120 usb_put_intf(dev->intf);
2121 usb_put_dev(dev->udev);
2122
2123 #ifdef CONFIG_MEDIA_CONTROLLER
2124 media_device_cleanup(&dev->mdev);
2125 #endif
2126
2127 list_for_each_safe(p, n, &dev->chains) {
2128 struct uvc_video_chain *chain;
2129 chain = list_entry(p, struct uvc_video_chain, list);
2130 kfree(chain);
2131 }
2132
2133 list_for_each_safe(p, n, &dev->entities) {
2134 struct uvc_entity *entity;
2135 entity = list_entry(p, struct uvc_entity, list);
2136 #ifdef CONFIG_MEDIA_CONTROLLER
2137 uvc_mc_cleanup_entity(entity);
2138 #endif
2139 kfree(entity);
2140 }
2141
2142 list_for_each_safe(p, n, &dev->streams) {
2143 struct uvc_streaming *streaming;
2144 streaming = list_entry(p, struct uvc_streaming, list);
2145 usb_driver_release_interface(&uvc_driver.driver,
2146 streaming->intf);
2147 uvc_stream_delete(streaming);
2148 }
2149
2150 kfree(dev);
2151 }
2152
uvc_release(struct video_device * vdev)2153 static void uvc_release(struct video_device *vdev)
2154 {
2155 struct uvc_streaming *stream = video_get_drvdata(vdev);
2156 struct uvc_device *dev = stream->dev;
2157
2158 kref_put(&dev->ref, uvc_delete);
2159 }
2160
2161 /*
2162 * Unregister the video devices.
2163 */
uvc_unregister_video(struct uvc_device * dev)2164 static void uvc_unregister_video(struct uvc_device *dev)
2165 {
2166 struct uvc_streaming *stream;
2167
2168 list_for_each_entry(stream, &dev->streams, list) {
2169 if (!video_is_registered(&stream->vdev))
2170 continue;
2171
2172 video_unregister_device(&stream->vdev);
2173 video_unregister_device(&stream->meta.vdev);
2174
2175 uvc_debugfs_cleanup_stream(stream);
2176 }
2177
2178 uvc_status_unregister(dev);
2179
2180 if (dev->vdev.dev)
2181 v4l2_device_unregister(&dev->vdev);
2182 #ifdef CONFIG_MEDIA_CONTROLLER
2183 if (media_devnode_is_registered(dev->mdev.devnode))
2184 media_device_unregister(&dev->mdev);
2185 #endif
2186 }
2187
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)2188 int uvc_register_video_device(struct uvc_device *dev,
2189 struct uvc_streaming *stream,
2190 struct video_device *vdev,
2191 struct uvc_video_queue *queue,
2192 enum v4l2_buf_type type,
2193 const struct v4l2_file_operations *fops,
2194 const struct v4l2_ioctl_ops *ioctl_ops)
2195 {
2196 const char *name;
2197 int ret;
2198
2199 /* Initialize the video buffers queue. */
2200 ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
2201 if (ret)
2202 return ret;
2203
2204 /* Register the device with V4L. */
2205
2206 /*
2207 * We already hold a reference to dev->udev. The video device will be
2208 * unregistered before the reference is released, so we don't need to
2209 * get another one.
2210 */
2211 vdev->v4l2_dev = &dev->vdev;
2212 vdev->fops = fops;
2213 vdev->ioctl_ops = ioctl_ops;
2214 vdev->release = uvc_release;
2215 vdev->prio = &stream->chain->prio;
2216 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2217 vdev->vfl_dir = VFL_DIR_TX;
2218 else
2219 vdev->vfl_dir = VFL_DIR_RX;
2220
2221 switch (type) {
2222 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
2223 default:
2224 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
2225 name = "Video Capture";
2226 break;
2227 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
2228 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
2229 name = "Video Output";
2230 break;
2231 case V4L2_BUF_TYPE_META_CAPTURE:
2232 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
2233 name = "Metadata";
2234 break;
2235 }
2236
2237 snprintf(vdev->name, sizeof(vdev->name), "%s %u", name,
2238 stream->header.bTerminalLink);
2239
2240 /*
2241 * Set the driver data before calling video_register_device, otherwise
2242 * the file open() handler might race us.
2243 */
2244 video_set_drvdata(vdev, stream);
2245
2246 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
2247 if (ret < 0) {
2248 dev_err(&stream->intf->dev,
2249 "Failed to register %s device (%d).\n",
2250 v4l2_type_names[type], ret);
2251 return ret;
2252 }
2253
2254 kref_get(&dev->ref);
2255 return 0;
2256 }
2257
uvc_register_video(struct uvc_device * dev,struct uvc_streaming * stream)2258 static int uvc_register_video(struct uvc_device *dev,
2259 struct uvc_streaming *stream)
2260 {
2261 int ret;
2262
2263 /* Initialize the streaming interface with default parameters. */
2264 ret = uvc_video_init(stream);
2265 if (ret < 0) {
2266 dev_err(&stream->intf->dev,
2267 "Failed to initialize the device (%d).\n", ret);
2268 return ret;
2269 }
2270
2271 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2272 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
2273 | V4L2_CAP_META_CAPTURE;
2274 else
2275 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
2276
2277 uvc_debugfs_init_stream(stream);
2278
2279 /* Register the device with V4L. */
2280 return uvc_register_video_device(dev, stream, &stream->vdev,
2281 &stream->queue, stream->type,
2282 &uvc_fops, &uvc_ioctl_ops);
2283 }
2284
2285 /*
2286 * Register all video devices in all chains.
2287 */
uvc_register_terms(struct uvc_device * dev,struct uvc_video_chain * chain)2288 static int uvc_register_terms(struct uvc_device *dev,
2289 struct uvc_video_chain *chain)
2290 {
2291 struct uvc_streaming *stream;
2292 struct uvc_entity *term;
2293 int ret;
2294
2295 list_for_each_entry(term, &chain->entities, chain) {
2296 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
2297 continue;
2298
2299 stream = uvc_stream_by_id(dev, term->id);
2300 if (stream == NULL) {
2301 dev_info(&dev->udev->dev,
2302 "No streaming interface found for terminal %u.",
2303 term->id);
2304 continue;
2305 }
2306
2307 stream->chain = chain;
2308 ret = uvc_register_video(dev, stream);
2309 if (ret < 0)
2310 return ret;
2311
2312 /* Register a metadata node, but ignore a possible failure,
2313 * complete registration of video nodes anyway.
2314 */
2315 uvc_meta_register(stream);
2316
2317 term->vdev = &stream->vdev;
2318 }
2319
2320 return 0;
2321 }
2322
uvc_register_chains(struct uvc_device * dev)2323 static int uvc_register_chains(struct uvc_device *dev)
2324 {
2325 struct uvc_video_chain *chain;
2326 int ret;
2327
2328 list_for_each_entry(chain, &dev->chains, list) {
2329 ret = uvc_register_terms(dev, chain);
2330 if (ret < 0)
2331 return ret;
2332
2333 #ifdef CONFIG_MEDIA_CONTROLLER
2334 ret = uvc_mc_register_entities(chain);
2335 if (ret < 0)
2336 dev_info(&dev->udev->dev,
2337 "Failed to register entities (%d).\n", ret);
2338 #endif
2339 }
2340
2341 return 0;
2342 }
2343
2344 /* ------------------------------------------------------------------------
2345 * USB probe, disconnect, suspend and resume
2346 */
2347
2348 static const struct uvc_device_info uvc_quirk_none = { 0 };
2349
uvc_probe(struct usb_interface * intf,const struct usb_device_id * id)2350 static int uvc_probe(struct usb_interface *intf,
2351 const struct usb_device_id *id)
2352 {
2353 struct usb_device *udev = interface_to_usbdev(intf);
2354 struct uvc_device *dev;
2355 const struct uvc_device_info *info =
2356 (const struct uvc_device_info *)id->driver_info;
2357 int function;
2358 int ret;
2359
2360 /* Allocate memory for the device and initialize it. */
2361 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2362 if (dev == NULL)
2363 return -ENOMEM;
2364
2365 INIT_LIST_HEAD(&dev->entities);
2366 INIT_LIST_HEAD(&dev->chains);
2367 INIT_LIST_HEAD(&dev->streams);
2368 kref_init(&dev->ref);
2369 atomic_set(&dev->nmappings, 0);
2370 mutex_init(&dev->lock);
2371
2372 dev->udev = usb_get_dev(udev);
2373 dev->intf = usb_get_intf(intf);
2374 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
2375 dev->info = info ? info : &uvc_quirk_none;
2376 dev->quirks = uvc_quirks_param == -1
2377 ? dev->info->quirks : uvc_quirks_param;
2378
2379 if (id->idVendor && id->idProduct)
2380 uvc_dbg(dev, PROBE, "Probing known UVC device %s (%04x:%04x)\n",
2381 udev->devpath, id->idVendor, id->idProduct);
2382 else
2383 uvc_dbg(dev, PROBE, "Probing generic UVC device %s\n",
2384 udev->devpath);
2385
2386 if (udev->product != NULL)
2387 strscpy(dev->name, udev->product, sizeof(dev->name));
2388 else
2389 snprintf(dev->name, sizeof(dev->name),
2390 "UVC Camera (%04x:%04x)",
2391 le16_to_cpu(udev->descriptor.idVendor),
2392 le16_to_cpu(udev->descriptor.idProduct));
2393
2394 /*
2395 * Add iFunction or iInterface to names when available as additional
2396 * distinguishers between interfaces. iFunction is prioritized over
2397 * iInterface which matches Windows behavior at the point of writing.
2398 */
2399 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
2400 function = intf->intf_assoc->iFunction;
2401 else
2402 function = intf->cur_altsetting->desc.iInterface;
2403 if (function != 0) {
2404 size_t len;
2405
2406 strlcat(dev->name, ": ", sizeof(dev->name));
2407 len = strlen(dev->name);
2408 usb_string(udev, function, dev->name + len,
2409 sizeof(dev->name) - len);
2410 }
2411
2412 /* Initialize the media device. */
2413 #ifdef CONFIG_MEDIA_CONTROLLER
2414 dev->mdev.dev = &intf->dev;
2415 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
2416 if (udev->serial)
2417 strscpy(dev->mdev.serial, udev->serial,
2418 sizeof(dev->mdev.serial));
2419 usb_make_path(udev, dev->mdev.bus_info, sizeof(dev->mdev.bus_info));
2420 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
2421 media_device_init(&dev->mdev);
2422
2423 dev->vdev.mdev = &dev->mdev;
2424 #endif
2425
2426 /* Parse the Video Class control descriptor. */
2427 if (uvc_parse_control(dev) < 0) {
2428 uvc_dbg(dev, PROBE, "Unable to parse UVC descriptors\n");
2429 goto error;
2430 }
2431
2432 /* Parse the associated GPIOs. */
2433 if (uvc_gpio_parse(dev) < 0) {
2434 uvc_dbg(dev, PROBE, "Unable to parse UVC GPIOs\n");
2435 goto error;
2436 }
2437
2438 dev_info(&dev->udev->dev, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2439 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2440 udev->product ? udev->product : "<unnamed>",
2441 le16_to_cpu(udev->descriptor.idVendor),
2442 le16_to_cpu(udev->descriptor.idProduct));
2443
2444 if (dev->quirks != dev->info->quirks) {
2445 dev_info(&dev->udev->dev,
2446 "Forcing device quirks to 0x%x by module parameter for testing purpose.\n",
2447 dev->quirks);
2448 dev_info(&dev->udev->dev,
2449 "Please report required quirks to the linux-uvc-devel mailing list.\n");
2450 }
2451
2452 if (dev->info->uvc_version) {
2453 dev->uvc_version = dev->info->uvc_version;
2454 dev_info(&dev->udev->dev, "Forcing UVC version to %u.%02x\n",
2455 dev->uvc_version >> 8, dev->uvc_version & 0xff);
2456 }
2457
2458 /* Register the V4L2 device. */
2459 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2460 goto error;
2461
2462 /* Scan the device for video chains. */
2463 if (uvc_scan_device(dev) < 0)
2464 goto error;
2465
2466 /* Initialize controls. */
2467 if (uvc_ctrl_init_device(dev) < 0)
2468 goto error;
2469
2470 /* Register video device nodes. */
2471 if (uvc_register_chains(dev) < 0)
2472 goto error;
2473
2474 #ifdef CONFIG_MEDIA_CONTROLLER
2475 /* Register the media device node */
2476 if (media_device_register(&dev->mdev) < 0)
2477 goto error;
2478 #endif
2479 /* Save our data pointer in the interface data. */
2480 usb_set_intfdata(intf, dev);
2481
2482 /* Initialize the interrupt URB. */
2483 if ((ret = uvc_status_init(dev)) < 0) {
2484 dev_info(&dev->udev->dev,
2485 "Unable to initialize the status endpoint (%d), status interrupt will not be supported.\n",
2486 ret);
2487 }
2488
2489 ret = uvc_gpio_init_irq(dev);
2490 if (ret < 0) {
2491 dev_err(&dev->udev->dev,
2492 "Unable to request privacy GPIO IRQ (%d)\n", ret);
2493 goto error;
2494 }
2495
2496 uvc_dbg(dev, PROBE, "UVC device initialized\n");
2497 usb_enable_autosuspend(udev);
2498 return 0;
2499
2500 error:
2501 uvc_unregister_video(dev);
2502 kref_put(&dev->ref, uvc_delete);
2503 return -ENODEV;
2504 }
2505
uvc_disconnect(struct usb_interface * intf)2506 static void uvc_disconnect(struct usb_interface *intf)
2507 {
2508 struct uvc_device *dev = usb_get_intfdata(intf);
2509
2510 /* Set the USB interface data to NULL. This can be done outside the
2511 * lock, as there's no other reader.
2512 */
2513 usb_set_intfdata(intf, NULL);
2514
2515 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2516 UVC_SC_VIDEOSTREAMING)
2517 return;
2518
2519 uvc_unregister_video(dev);
2520 kref_put(&dev->ref, uvc_delete);
2521 }
2522
uvc_suspend(struct usb_interface * intf,pm_message_t message)2523 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2524 {
2525 struct uvc_device *dev = usb_get_intfdata(intf);
2526 struct uvc_streaming *stream;
2527
2528 uvc_dbg(dev, SUSPEND, "Suspending interface %u\n",
2529 intf->cur_altsetting->desc.bInterfaceNumber);
2530
2531 /* Controls are cached on the fly so they don't need to be saved. */
2532 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2533 UVC_SC_VIDEOCONTROL) {
2534 mutex_lock(&dev->lock);
2535 if (dev->users)
2536 uvc_status_stop(dev);
2537 mutex_unlock(&dev->lock);
2538 return 0;
2539 }
2540
2541 list_for_each_entry(stream, &dev->streams, list) {
2542 if (stream->intf == intf)
2543 return uvc_video_suspend(stream);
2544 }
2545
2546 uvc_dbg(dev, SUSPEND,
2547 "Suspend: video streaming USB interface mismatch\n");
2548 return -EINVAL;
2549 }
2550
__uvc_resume(struct usb_interface * intf,int reset)2551 static int __uvc_resume(struct usb_interface *intf, int reset)
2552 {
2553 struct uvc_device *dev = usb_get_intfdata(intf);
2554 struct uvc_streaming *stream;
2555 int ret = 0;
2556
2557 uvc_dbg(dev, SUSPEND, "Resuming interface %u\n",
2558 intf->cur_altsetting->desc.bInterfaceNumber);
2559
2560 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2561 UVC_SC_VIDEOCONTROL) {
2562 if (reset) {
2563 ret = uvc_ctrl_restore_values(dev);
2564 if (ret < 0)
2565 return ret;
2566 }
2567
2568 mutex_lock(&dev->lock);
2569 if (dev->users)
2570 ret = uvc_status_start(dev, GFP_NOIO);
2571 mutex_unlock(&dev->lock);
2572
2573 return ret;
2574 }
2575
2576 list_for_each_entry(stream, &dev->streams, list) {
2577 if (stream->intf == intf) {
2578 ret = uvc_video_resume(stream, reset);
2579 if (ret < 0)
2580 uvc_queue_streamoff(&stream->queue,
2581 stream->queue.queue.type);
2582 return ret;
2583 }
2584 }
2585
2586 uvc_dbg(dev, SUSPEND,
2587 "Resume: video streaming USB interface mismatch\n");
2588 return -EINVAL;
2589 }
2590
uvc_resume(struct usb_interface * intf)2591 static int uvc_resume(struct usb_interface *intf)
2592 {
2593 return __uvc_resume(intf, 0);
2594 }
2595
uvc_reset_resume(struct usb_interface * intf)2596 static int uvc_reset_resume(struct usb_interface *intf)
2597 {
2598 return __uvc_resume(intf, 1);
2599 }
2600
2601 /* ------------------------------------------------------------------------
2602 * Module parameters
2603 */
2604
uvc_clock_param_get(char * buffer,const struct kernel_param * kp)2605 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
2606 {
2607 if (uvc_clock_param == CLOCK_MONOTONIC)
2608 return sprintf(buffer, "CLOCK_MONOTONIC");
2609 else
2610 return sprintf(buffer, "CLOCK_REALTIME");
2611 }
2612
uvc_clock_param_set(const char * val,const struct kernel_param * kp)2613 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
2614 {
2615 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2616 val += strlen("clock_");
2617
2618 if (strcasecmp(val, "monotonic") == 0)
2619 uvc_clock_param = CLOCK_MONOTONIC;
2620 else if (strcasecmp(val, "realtime") == 0)
2621 uvc_clock_param = CLOCK_REALTIME;
2622 else
2623 return -EINVAL;
2624
2625 return 0;
2626 }
2627
2628 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2629 &uvc_clock_param, S_IRUGO|S_IWUSR);
2630 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2631 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2632 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2633 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2634 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2635 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2636 MODULE_PARM_DESC(quirks, "Forced device quirks");
2637 module_param_named(trace, uvc_dbg_param, uint, S_IRUGO|S_IWUSR);
2638 MODULE_PARM_DESC(trace, "Trace level bitmask");
2639 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2640 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2641
2642 /* ------------------------------------------------------------------------
2643 * Driver initialization and cleanup
2644 */
2645
2646 static const struct uvc_device_info uvc_quirk_probe_minmax = {
2647 .quirks = UVC_QUIRK_PROBE_MINMAX,
2648 };
2649
2650 static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
2651 .quirks = UVC_QUIRK_FIX_BANDWIDTH,
2652 };
2653
2654 static const struct uvc_device_info uvc_quirk_probe_def = {
2655 .quirks = UVC_QUIRK_PROBE_DEF,
2656 };
2657
2658 static const struct uvc_device_info uvc_quirk_stream_no_fid = {
2659 .quirks = UVC_QUIRK_STREAM_NO_FID,
2660 };
2661
2662 static const struct uvc_device_info uvc_quirk_force_y8 = {
2663 .quirks = UVC_QUIRK_FORCE_Y8,
2664 };
2665
2666 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
2667 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \
2668 {.meta_format = m}
2669
2670 /*
2671 * The Logitech cameras listed below have their interface class set to
2672 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2673 * though they are compliant.
2674 */
2675 static const struct usb_device_id uvc_ids[] = {
2676 /* LogiLink Wireless Webcam */
2677 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2678 | USB_DEVICE_ID_MATCH_INT_INFO,
2679 .idVendor = 0x0416,
2680 .idProduct = 0xa91a,
2681 .bInterfaceClass = USB_CLASS_VIDEO,
2682 .bInterfaceSubClass = 1,
2683 .bInterfaceProtocol = 0,
2684 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2685 /* Genius eFace 2025 */
2686 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2687 | USB_DEVICE_ID_MATCH_INT_INFO,
2688 .idVendor = 0x0458,
2689 .idProduct = 0x706e,
2690 .bInterfaceClass = USB_CLASS_VIDEO,
2691 .bInterfaceSubClass = 1,
2692 .bInterfaceProtocol = 0,
2693 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2694 /* Microsoft Lifecam NX-6000 */
2695 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2696 | USB_DEVICE_ID_MATCH_INT_INFO,
2697 .idVendor = 0x045e,
2698 .idProduct = 0x00f8,
2699 .bInterfaceClass = USB_CLASS_VIDEO,
2700 .bInterfaceSubClass = 1,
2701 .bInterfaceProtocol = 0,
2702 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2703 /* Microsoft Lifecam NX-3000 */
2704 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2705 | USB_DEVICE_ID_MATCH_INT_INFO,
2706 .idVendor = 0x045e,
2707 .idProduct = 0x0721,
2708 .bInterfaceClass = USB_CLASS_VIDEO,
2709 .bInterfaceSubClass = 1,
2710 .bInterfaceProtocol = 0,
2711 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2712 /* Microsoft Lifecam VX-7000 */
2713 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2714 | USB_DEVICE_ID_MATCH_INT_INFO,
2715 .idVendor = 0x045e,
2716 .idProduct = 0x0723,
2717 .bInterfaceClass = USB_CLASS_VIDEO,
2718 .bInterfaceSubClass = 1,
2719 .bInterfaceProtocol = 0,
2720 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2721 /* Logitech Quickcam Fusion */
2722 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2723 | USB_DEVICE_ID_MATCH_INT_INFO,
2724 .idVendor = 0x046d,
2725 .idProduct = 0x08c1,
2726 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2727 .bInterfaceSubClass = 1,
2728 .bInterfaceProtocol = 0 },
2729 /* Logitech Quickcam Orbit MP */
2730 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2731 | USB_DEVICE_ID_MATCH_INT_INFO,
2732 .idVendor = 0x046d,
2733 .idProduct = 0x08c2,
2734 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2735 .bInterfaceSubClass = 1,
2736 .bInterfaceProtocol = 0 },
2737 /* Logitech Quickcam Pro for Notebook */
2738 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2739 | USB_DEVICE_ID_MATCH_INT_INFO,
2740 .idVendor = 0x046d,
2741 .idProduct = 0x08c3,
2742 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2743 .bInterfaceSubClass = 1,
2744 .bInterfaceProtocol = 0 },
2745 /* Logitech Quickcam Pro 5000 */
2746 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2747 | USB_DEVICE_ID_MATCH_INT_INFO,
2748 .idVendor = 0x046d,
2749 .idProduct = 0x08c5,
2750 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2751 .bInterfaceSubClass = 1,
2752 .bInterfaceProtocol = 0 },
2753 /* Logitech Quickcam OEM Dell Notebook */
2754 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2755 | USB_DEVICE_ID_MATCH_INT_INFO,
2756 .idVendor = 0x046d,
2757 .idProduct = 0x08c6,
2758 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2759 .bInterfaceSubClass = 1,
2760 .bInterfaceProtocol = 0 },
2761 /* Logitech Quickcam OEM Cisco VT Camera II */
2762 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2763 | USB_DEVICE_ID_MATCH_INT_INFO,
2764 .idVendor = 0x046d,
2765 .idProduct = 0x08c7,
2766 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2767 .bInterfaceSubClass = 1,
2768 .bInterfaceProtocol = 0 },
2769 /* Logitech HD Pro Webcam C920 */
2770 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2771 | USB_DEVICE_ID_MATCH_INT_INFO,
2772 .idVendor = 0x046d,
2773 .idProduct = 0x082d,
2774 .bInterfaceClass = USB_CLASS_VIDEO,
2775 .bInterfaceSubClass = 1,
2776 .bInterfaceProtocol = 0,
2777 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
2778 /* Chicony CNF7129 (Asus EEE 100HE) */
2779 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2780 | USB_DEVICE_ID_MATCH_INT_INFO,
2781 .idVendor = 0x04f2,
2782 .idProduct = 0xb071,
2783 .bInterfaceClass = USB_CLASS_VIDEO,
2784 .bInterfaceSubClass = 1,
2785 .bInterfaceProtocol = 0,
2786 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) },
2787 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2788 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2789 | USB_DEVICE_ID_MATCH_INT_INFO,
2790 .idVendor = 0x058f,
2791 .idProduct = 0x3820,
2792 .bInterfaceClass = USB_CLASS_VIDEO,
2793 .bInterfaceSubClass = 1,
2794 .bInterfaceProtocol = 0,
2795 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2796 /* Dell XPS m1530 */
2797 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2798 | USB_DEVICE_ID_MATCH_INT_INFO,
2799 .idVendor = 0x05a9,
2800 .idProduct = 0x2640,
2801 .bInterfaceClass = USB_CLASS_VIDEO,
2802 .bInterfaceSubClass = 1,
2803 .bInterfaceProtocol = 0,
2804 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2805 /* Dell SP2008WFP Monitor */
2806 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2807 | USB_DEVICE_ID_MATCH_INT_INFO,
2808 .idVendor = 0x05a9,
2809 .idProduct = 0x2641,
2810 .bInterfaceClass = USB_CLASS_VIDEO,
2811 .bInterfaceSubClass = 1,
2812 .bInterfaceProtocol = 0,
2813 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2814 /* Dell Alienware X51 */
2815 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2816 | USB_DEVICE_ID_MATCH_INT_INFO,
2817 .idVendor = 0x05a9,
2818 .idProduct = 0x2643,
2819 .bInterfaceClass = USB_CLASS_VIDEO,
2820 .bInterfaceSubClass = 1,
2821 .bInterfaceProtocol = 0,
2822 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2823 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2824 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2825 | USB_DEVICE_ID_MATCH_INT_INFO,
2826 .idVendor = 0x05a9,
2827 .idProduct = 0x264a,
2828 .bInterfaceClass = USB_CLASS_VIDEO,
2829 .bInterfaceSubClass = 1,
2830 .bInterfaceProtocol = 0,
2831 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2832 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2833 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2834 | USB_DEVICE_ID_MATCH_INT_INFO,
2835 .idVendor = 0x05a9,
2836 .idProduct = 0x7670,
2837 .bInterfaceClass = USB_CLASS_VIDEO,
2838 .bInterfaceSubClass = 1,
2839 .bInterfaceProtocol = 0,
2840 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2841 /* Apple Built-In iSight */
2842 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2843 | USB_DEVICE_ID_MATCH_INT_INFO,
2844 .idVendor = 0x05ac,
2845 .idProduct = 0x8501,
2846 .bInterfaceClass = USB_CLASS_VIDEO,
2847 .bInterfaceSubClass = 1,
2848 .bInterfaceProtocol = 0,
2849 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2850 | UVC_QUIRK_BUILTIN_ISIGHT) },
2851 /* Apple Built-In iSight via iBridge */
2852 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2853 | USB_DEVICE_ID_MATCH_INT_INFO,
2854 .idVendor = 0x05ac,
2855 .idProduct = 0x8600,
2856 .bInterfaceClass = USB_CLASS_VIDEO,
2857 .bInterfaceSubClass = 1,
2858 .bInterfaceProtocol = 0,
2859 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2860 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2861 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2862 | USB_DEVICE_ID_MATCH_INT_INFO,
2863 .idVendor = 0x05c8,
2864 .idProduct = 0x0403,
2865 .bInterfaceClass = USB_CLASS_VIDEO,
2866 .bInterfaceSubClass = 1,
2867 .bInterfaceProtocol = 0,
2868 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2869 /* Genesys Logic USB 2.0 PC Camera */
2870 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2871 | USB_DEVICE_ID_MATCH_INT_INFO,
2872 .idVendor = 0x05e3,
2873 .idProduct = 0x0505,
2874 .bInterfaceClass = USB_CLASS_VIDEO,
2875 .bInterfaceSubClass = 1,
2876 .bInterfaceProtocol = 0,
2877 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2878 /* Hercules Classic Silver */
2879 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2880 | USB_DEVICE_ID_MATCH_INT_INFO,
2881 .idVendor = 0x06f8,
2882 .idProduct = 0x300c,
2883 .bInterfaceClass = USB_CLASS_VIDEO,
2884 .bInterfaceSubClass = 1,
2885 .bInterfaceProtocol = 0,
2886 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2887 /* ViMicro Vega */
2888 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2889 | USB_DEVICE_ID_MATCH_INT_INFO,
2890 .idVendor = 0x0ac8,
2891 .idProduct = 0x332d,
2892 .bInterfaceClass = USB_CLASS_VIDEO,
2893 .bInterfaceSubClass = 1,
2894 .bInterfaceProtocol = 0,
2895 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2896 /* ViMicro - Minoru3D */
2897 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2898 | USB_DEVICE_ID_MATCH_INT_INFO,
2899 .idVendor = 0x0ac8,
2900 .idProduct = 0x3410,
2901 .bInterfaceClass = USB_CLASS_VIDEO,
2902 .bInterfaceSubClass = 1,
2903 .bInterfaceProtocol = 0,
2904 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2905 /* ViMicro Venus - Minoru3D */
2906 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2907 | USB_DEVICE_ID_MATCH_INT_INFO,
2908 .idVendor = 0x0ac8,
2909 .idProduct = 0x3420,
2910 .bInterfaceClass = USB_CLASS_VIDEO,
2911 .bInterfaceSubClass = 1,
2912 .bInterfaceProtocol = 0,
2913 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2914 /* Ophir Optronics - SPCAM 620U */
2915 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2916 | USB_DEVICE_ID_MATCH_INT_INFO,
2917 .idVendor = 0x0bd3,
2918 .idProduct = 0x0555,
2919 .bInterfaceClass = USB_CLASS_VIDEO,
2920 .bInterfaceSubClass = 1,
2921 .bInterfaceProtocol = 0,
2922 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2923 /* MT6227 */
2924 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2925 | USB_DEVICE_ID_MATCH_INT_INFO,
2926 .idVendor = 0x0e8d,
2927 .idProduct = 0x0004,
2928 .bInterfaceClass = USB_CLASS_VIDEO,
2929 .bInterfaceSubClass = 1,
2930 .bInterfaceProtocol = 0,
2931 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2932 | UVC_QUIRK_PROBE_DEF) },
2933 /* IMC Networks (Medion Akoya) */
2934 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2935 | USB_DEVICE_ID_MATCH_INT_INFO,
2936 .idVendor = 0x13d3,
2937 .idProduct = 0x5103,
2938 .bInterfaceClass = USB_CLASS_VIDEO,
2939 .bInterfaceSubClass = 1,
2940 .bInterfaceProtocol = 0,
2941 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2942 /* JMicron USB2.0 XGA WebCam */
2943 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2944 | USB_DEVICE_ID_MATCH_INT_INFO,
2945 .idVendor = 0x152d,
2946 .idProduct = 0x0310,
2947 .bInterfaceClass = USB_CLASS_VIDEO,
2948 .bInterfaceSubClass = 1,
2949 .bInterfaceProtocol = 0,
2950 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2951 /* Syntek (HP Spartan) */
2952 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2953 | USB_DEVICE_ID_MATCH_INT_INFO,
2954 .idVendor = 0x174f,
2955 .idProduct = 0x5212,
2956 .bInterfaceClass = USB_CLASS_VIDEO,
2957 .bInterfaceSubClass = 1,
2958 .bInterfaceProtocol = 0,
2959 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2960 /* Syntek (Samsung Q310) */
2961 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2962 | USB_DEVICE_ID_MATCH_INT_INFO,
2963 .idVendor = 0x174f,
2964 .idProduct = 0x5931,
2965 .bInterfaceClass = USB_CLASS_VIDEO,
2966 .bInterfaceSubClass = 1,
2967 .bInterfaceProtocol = 0,
2968 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2969 /* Syntek (Packard Bell EasyNote MX52 */
2970 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2971 | USB_DEVICE_ID_MATCH_INT_INFO,
2972 .idVendor = 0x174f,
2973 .idProduct = 0x8a12,
2974 .bInterfaceClass = USB_CLASS_VIDEO,
2975 .bInterfaceSubClass = 1,
2976 .bInterfaceProtocol = 0,
2977 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2978 /* Syntek (Asus F9SG) */
2979 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2980 | USB_DEVICE_ID_MATCH_INT_INFO,
2981 .idVendor = 0x174f,
2982 .idProduct = 0x8a31,
2983 .bInterfaceClass = USB_CLASS_VIDEO,
2984 .bInterfaceSubClass = 1,
2985 .bInterfaceProtocol = 0,
2986 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2987 /* Syntek (Asus U3S) */
2988 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2989 | USB_DEVICE_ID_MATCH_INT_INFO,
2990 .idVendor = 0x174f,
2991 .idProduct = 0x8a33,
2992 .bInterfaceClass = USB_CLASS_VIDEO,
2993 .bInterfaceSubClass = 1,
2994 .bInterfaceProtocol = 0,
2995 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2996 /* Syntek (JAOtech Smart Terminal) */
2997 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2998 | USB_DEVICE_ID_MATCH_INT_INFO,
2999 .idVendor = 0x174f,
3000 .idProduct = 0x8a34,
3001 .bInterfaceClass = USB_CLASS_VIDEO,
3002 .bInterfaceSubClass = 1,
3003 .bInterfaceProtocol = 0,
3004 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
3005 /* Miricle 307K */
3006 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3007 | USB_DEVICE_ID_MATCH_INT_INFO,
3008 .idVendor = 0x17dc,
3009 .idProduct = 0x0202,
3010 .bInterfaceClass = USB_CLASS_VIDEO,
3011 .bInterfaceSubClass = 1,
3012 .bInterfaceProtocol = 0,
3013 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
3014 /* Lenovo Thinkpad SL400/SL500 */
3015 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3016 | USB_DEVICE_ID_MATCH_INT_INFO,
3017 .idVendor = 0x17ef,
3018 .idProduct = 0x480b,
3019 .bInterfaceClass = USB_CLASS_VIDEO,
3020 .bInterfaceSubClass = 1,
3021 .bInterfaceProtocol = 0,
3022 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
3023 /* Aveo Technology USB 2.0 Camera */
3024 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3025 | USB_DEVICE_ID_MATCH_INT_INFO,
3026 .idVendor = 0x1871,
3027 .idProduct = 0x0306,
3028 .bInterfaceClass = USB_CLASS_VIDEO,
3029 .bInterfaceSubClass = 1,
3030 .bInterfaceProtocol = 0,
3031 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
3032 | UVC_QUIRK_PROBE_EXTRAFIELDS) },
3033 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
3034 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3035 | USB_DEVICE_ID_MATCH_INT_INFO,
3036 .idVendor = 0x1871,
3037 .idProduct = 0x0516,
3038 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
3039 .bInterfaceSubClass = 1,
3040 .bInterfaceProtocol = 0 },
3041 /* Ecamm Pico iMage */
3042 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3043 | USB_DEVICE_ID_MATCH_INT_INFO,
3044 .idVendor = 0x18cd,
3045 .idProduct = 0xcafe,
3046 .bInterfaceClass = USB_CLASS_VIDEO,
3047 .bInterfaceSubClass = 1,
3048 .bInterfaceProtocol = 0,
3049 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) },
3050 /* Manta MM-353 Plako */
3051 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3052 | USB_DEVICE_ID_MATCH_INT_INFO,
3053 .idVendor = 0x18ec,
3054 .idProduct = 0x3188,
3055 .bInterfaceClass = USB_CLASS_VIDEO,
3056 .bInterfaceSubClass = 1,
3057 .bInterfaceProtocol = 0,
3058 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
3059 /* FSC WebCam V30S */
3060 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3061 | USB_DEVICE_ID_MATCH_INT_INFO,
3062 .idVendor = 0x18ec,
3063 .idProduct = 0x3288,
3064 .bInterfaceClass = USB_CLASS_VIDEO,
3065 .bInterfaceSubClass = 1,
3066 .bInterfaceProtocol = 0,
3067 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
3068 /* Arkmicro unbranded */
3069 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3070 | USB_DEVICE_ID_MATCH_INT_INFO,
3071 .idVendor = 0x18ec,
3072 .idProduct = 0x3290,
3073 .bInterfaceClass = USB_CLASS_VIDEO,
3074 .bInterfaceSubClass = 1,
3075 .bInterfaceProtocol = 0,
3076 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
3077 /* The Imaging Source USB CCD cameras */
3078 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3079 | USB_DEVICE_ID_MATCH_INT_INFO,
3080 .idVendor = 0x199e,
3081 .idProduct = 0x8102,
3082 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
3083 .bInterfaceSubClass = 1,
3084 .bInterfaceProtocol = 0 },
3085 /* Bodelin ProScopeHR */
3086 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3087 | USB_DEVICE_ID_MATCH_DEV_HI
3088 | USB_DEVICE_ID_MATCH_INT_INFO,
3089 .idVendor = 0x19ab,
3090 .idProduct = 0x1000,
3091 .bcdDevice_hi = 0x0126,
3092 .bInterfaceClass = USB_CLASS_VIDEO,
3093 .bInterfaceSubClass = 1,
3094 .bInterfaceProtocol = 0,
3095 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) },
3096 /* MSI StarCam 370i */
3097 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3098 | USB_DEVICE_ID_MATCH_INT_INFO,
3099 .idVendor = 0x1b3b,
3100 .idProduct = 0x2951,
3101 .bInterfaceClass = USB_CLASS_VIDEO,
3102 .bInterfaceSubClass = 1,
3103 .bInterfaceProtocol = 0,
3104 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
3105 /* Generalplus Technology Inc. 808 Camera */
3106 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3107 | USB_DEVICE_ID_MATCH_INT_INFO,
3108 .idVendor = 0x1b3f,
3109 .idProduct = 0x2002,
3110 .bInterfaceClass = USB_CLASS_VIDEO,
3111 .bInterfaceSubClass = 1,
3112 .bInterfaceProtocol = 0,
3113 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
3114 /* Shenzhen Aoni Electronic Co.,Ltd 2K FHD camera */
3115 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3116 | USB_DEVICE_ID_MATCH_INT_INFO,
3117 .idVendor = 0x1bcf,
3118 .idProduct = 0x0b40,
3119 .bInterfaceClass = USB_CLASS_VIDEO,
3120 .bInterfaceSubClass = 1,
3121 .bInterfaceProtocol = 0,
3122 .driver_info = (kernel_ulong_t)&(const struct uvc_device_info){
3123 .uvc_version = 0x010a,
3124 } },
3125 /* SiGma Micro USB Web Camera */
3126 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3127 | USB_DEVICE_ID_MATCH_INT_INFO,
3128 .idVendor = 0x1c4f,
3129 .idProduct = 0x3000,
3130 .bInterfaceClass = USB_CLASS_VIDEO,
3131 .bInterfaceSubClass = 1,
3132 .bInterfaceProtocol = 0,
3133 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
3134 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
3135 /* Oculus VR Positional Tracker DK2 */
3136 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3137 | USB_DEVICE_ID_MATCH_INT_INFO,
3138 .idVendor = 0x2833,
3139 .idProduct = 0x0201,
3140 .bInterfaceClass = USB_CLASS_VIDEO,
3141 .bInterfaceSubClass = 1,
3142 .bInterfaceProtocol = 0,
3143 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
3144 /* Oculus VR Rift Sensor */
3145 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3146 | USB_DEVICE_ID_MATCH_INT_INFO,
3147 .idVendor = 0x2833,
3148 .idProduct = 0x0211,
3149 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
3150 .bInterfaceSubClass = 1,
3151 .bInterfaceProtocol = 0,
3152 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
3153 /* GEO Semiconductor GC6500 */
3154 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3155 | USB_DEVICE_ID_MATCH_INT_INFO,
3156 .idVendor = 0x29fe,
3157 .idProduct = 0x4d53,
3158 .bInterfaceClass = USB_CLASS_VIDEO,
3159 .bInterfaceSubClass = 1,
3160 .bInterfaceProtocol = 0,
3161 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) },
3162 /* Intel RealSense D4M */
3163 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
3164 | USB_DEVICE_ID_MATCH_INT_INFO,
3165 .idVendor = 0x8086,
3166 .idProduct = 0x0b03,
3167 .bInterfaceClass = USB_CLASS_VIDEO,
3168 .bInterfaceSubClass = 1,
3169 .bInterfaceProtocol = 0,
3170 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) },
3171 /* Generic USB Video Class */
3172 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
3173 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
3174 {}
3175 };
3176
3177 MODULE_DEVICE_TABLE(usb, uvc_ids);
3178
3179 struct uvc_driver uvc_driver = {
3180 .driver = {
3181 .name = "uvcvideo",
3182 .probe = uvc_probe,
3183 .disconnect = uvc_disconnect,
3184 .suspend = uvc_suspend,
3185 .resume = uvc_resume,
3186 .reset_resume = uvc_reset_resume,
3187 .id_table = uvc_ids,
3188 .supports_autosuspend = 1,
3189 },
3190 };
3191
uvc_init(void)3192 static int __init uvc_init(void)
3193 {
3194 int ret;
3195
3196 uvc_debugfs_init();
3197
3198 ret = usb_register(&uvc_driver.driver);
3199 if (ret < 0) {
3200 uvc_debugfs_cleanup();
3201 return ret;
3202 }
3203
3204 return 0;
3205 }
3206
uvc_cleanup(void)3207 static void __exit uvc_cleanup(void)
3208 {
3209 usb_deregister(&uvc_driver.driver);
3210 uvc_debugfs_cleanup();
3211 }
3212
3213 module_init(uvc_init);
3214 module_exit(uvc_cleanup);
3215
3216 MODULE_AUTHOR(DRIVER_AUTHOR);
3217 MODULE_DESCRIPTION(DRIVER_DESC);
3218 MODULE_LICENSE("GPL");
3219 MODULE_VERSION(DRIVER_VERSION);
3220
3221