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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / media / usb / uvc / uvc_driver.c
blobddb9eaa11be71320adc20b4fd74ec3c7511c5c44
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * uvc_driver.c -- USB Video Class driver
4 *
5 * Copyright (C) 2005-2010
6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 */
8
9 #include <linux/atomic.h>
10 #include <linux/kernel.h>
11 #include <linux/list.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/usb.h>
15 #include <linux/videodev2.h>
16 #include <linux/vmalloc.h>
17 #include <linux/wait.h>
18 #include <linux/version.h>
19 #include <asm/unaligned.h>
20
21 #include <media/v4l2-common.h>
22 #include <media/v4l2-ioctl.h>
23
24 #include "uvcvideo.h"
25
26 #define DRIVER_AUTHOR "Laurent Pinchart " \
27 "<laurent.pinchart@ideasonboard.com>"
28 #define DRIVER_DESC "USB Video Class driver"
29
30 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
31 unsigned int uvc_hw_timestamps_param;
32 unsigned int uvc_no_drop_param;
33 static unsigned int uvc_quirks_param = -1;
34 unsigned int uvc_trace_param;
35 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
36
37 /* ------------------------------------------------------------------------
38 * Video formats
39 */
40
41 static struct uvc_format_desc uvc_fmts[] = {
42 {
43 .name = "YUV 4:2:2 (YUYV)",
44 .guid = UVC_GUID_FORMAT_YUY2,
45 .fcc = V4L2_PIX_FMT_YUYV,
46 },
47 {
48 .name = "YUV 4:2:2 (YUYV)",
49 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
50 .fcc = V4L2_PIX_FMT_YUYV,
51 },
52 {
53 .name = "YUV 4:2:0 (NV12)",
54 .guid = UVC_GUID_FORMAT_NV12,
55 .fcc = V4L2_PIX_FMT_NV12,
56 },
57 {
58 .name = "MJPEG",
59 .guid = UVC_GUID_FORMAT_MJPEG,
60 .fcc = V4L2_PIX_FMT_MJPEG,
61 },
62 {
63 .name = "YVU 4:2:0 (YV12)",
64 .guid = UVC_GUID_FORMAT_YV12,
65 .fcc = V4L2_PIX_FMT_YVU420,
66 },
67 {
68 .name = "YUV 4:2:0 (I420)",
69 .guid = UVC_GUID_FORMAT_I420,
70 .fcc = V4L2_PIX_FMT_YUV420,
71 },
72 {
73 .name = "YUV 4:2:0 (M420)",
74 .guid = UVC_GUID_FORMAT_M420,
75 .fcc = V4L2_PIX_FMT_M420,
76 },
77 {
78 .name = "YUV 4:2:2 (UYVY)",
79 .guid = UVC_GUID_FORMAT_UYVY,
80 .fcc = V4L2_PIX_FMT_UYVY,
81 },
82 {
83 .name = "Greyscale 8-bit (Y800)",
84 .guid = UVC_GUID_FORMAT_Y800,
85 .fcc = V4L2_PIX_FMT_GREY,
86 },
87 {
88 .name = "Greyscale 8-bit (Y8 )",
89 .guid = UVC_GUID_FORMAT_Y8,
90 .fcc = V4L2_PIX_FMT_GREY,
91 },
92 {
93 .name = "Greyscale 8-bit (D3DFMT_L8)",
94 .guid = UVC_GUID_FORMAT_D3DFMT_L8,
95 .fcc = V4L2_PIX_FMT_GREY,
96 },
97 {
98 .name = "IR 8-bit (L8_IR)",
99 .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR,
100 .fcc = V4L2_PIX_FMT_GREY,
101 },
102 {
103 .name = "Greyscale 10-bit (Y10 )",
104 .guid = UVC_GUID_FORMAT_Y10,
105 .fcc = V4L2_PIX_FMT_Y10,
106 },
107 {
108 .name = "Greyscale 12-bit (Y12 )",
109 .guid = UVC_GUID_FORMAT_Y12,
110 .fcc = V4L2_PIX_FMT_Y12,
111 },
112 {
113 .name = "Greyscale 16-bit (Y16 )",
114 .guid = UVC_GUID_FORMAT_Y16,
115 .fcc = V4L2_PIX_FMT_Y16,
116 },
117 {
118 .name = "BGGR Bayer (BY8 )",
119 .guid = UVC_GUID_FORMAT_BY8,
120 .fcc = V4L2_PIX_FMT_SBGGR8,
121 },
122 {
123 .name = "BGGR Bayer (BA81)",
124 .guid = UVC_GUID_FORMAT_BA81,
125 .fcc = V4L2_PIX_FMT_SBGGR8,
126 },
127 {
128 .name = "GBRG Bayer (GBRG)",
129 .guid = UVC_GUID_FORMAT_GBRG,
130 .fcc = V4L2_PIX_FMT_SGBRG8,
131 },
132 {
133 .name = "GRBG Bayer (GRBG)",
134 .guid = UVC_GUID_FORMAT_GRBG,
135 .fcc = V4L2_PIX_FMT_SGRBG8,
136 },
137 {
138 .name = "RGGB Bayer (RGGB)",
139 .guid = UVC_GUID_FORMAT_RGGB,
140 .fcc = V4L2_PIX_FMT_SRGGB8,
141 },
142 {
143 .name = "RGB565",
144 .guid = UVC_GUID_FORMAT_RGBP,
145 .fcc = V4L2_PIX_FMT_RGB565,
146 },
147 {
148 .name = "BGR 8:8:8 (BGR3)",
149 .guid = UVC_GUID_FORMAT_BGR3,
150 .fcc = V4L2_PIX_FMT_BGR24,
151 },
152 {
153 .name = "H.264",
154 .guid = UVC_GUID_FORMAT_H264,
155 .fcc = V4L2_PIX_FMT_H264,
156 },
157 {
158 .name = "Greyscale 8 L/R (Y8I)",
159 .guid = UVC_GUID_FORMAT_Y8I,
160 .fcc = V4L2_PIX_FMT_Y8I,
161 },
162 {
163 .name = "Greyscale 12 L/R (Y12I)",
164 .guid = UVC_GUID_FORMAT_Y12I,
165 .fcc = V4L2_PIX_FMT_Y12I,
166 },
167 {
168 .name = "Depth data 16-bit (Z16)",
169 .guid = UVC_GUID_FORMAT_Z16,
170 .fcc = V4L2_PIX_FMT_Z16,
171 },
172 {
173 .name = "Bayer 10-bit (SRGGB10P)",
174 .guid = UVC_GUID_FORMAT_RW10,
175 .fcc = V4L2_PIX_FMT_SRGGB10P,
176 },
177 {
178 .name = "Bayer 16-bit (SBGGR16)",
179 .guid = UVC_GUID_FORMAT_BG16,
180 .fcc = V4L2_PIX_FMT_SBGGR16,
181 },
182 {
183 .name = "Bayer 16-bit (SGBRG16)",
184 .guid = UVC_GUID_FORMAT_GB16,
185 .fcc = V4L2_PIX_FMT_SGBRG16,
186 },
187 {
188 .name = "Bayer 16-bit (SRGGB16)",
189 .guid = UVC_GUID_FORMAT_RG16,
190 .fcc = V4L2_PIX_FMT_SRGGB16,
191 },
192 {
193 .name = "Bayer 16-bit (SGRBG16)",
194 .guid = UVC_GUID_FORMAT_GR16,
195 .fcc = V4L2_PIX_FMT_SGRBG16,
196 },
197 {
198 .name = "Depth data 16-bit (Z16)",
199 .guid = UVC_GUID_FORMAT_INVZ,
200 .fcc = V4L2_PIX_FMT_Z16,
201 },
202 {
203 .name = "Greyscale 10-bit (Y10 )",
204 .guid = UVC_GUID_FORMAT_INVI,
205 .fcc = V4L2_PIX_FMT_Y10,
206 },
207 {
208 .name = "IR:Depth 26-bit (INZI)",
209 .guid = UVC_GUID_FORMAT_INZI,
210 .fcc = V4L2_PIX_FMT_INZI,
211 },
212 {
213 .name = "4-bit Depth Confidence (Packed)",
214 .guid = UVC_GUID_FORMAT_CNF4,
215 .fcc = V4L2_PIX_FMT_CNF4,
216 },
217 {
218 .name = "HEVC",
219 .guid = UVC_GUID_FORMAT_HEVC,
220 .fcc = V4L2_PIX_FMT_HEVC,
221 },
222 };
223
224 /* ------------------------------------------------------------------------
225 * Utility functions
226 */
227
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
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
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
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
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 */
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 */
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
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
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
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
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
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
500 static int uvc_parse_format(struct uvc_device *dev,
501 struct uvc_streaming *streaming, struct uvc_format *format,
502 u32 **intervals, unsigned char *buffer, int buflen)
503 {
504 struct usb_interface *intf = streaming->intf;
505 struct usb_host_interface *alts = intf->cur_altsetting;
506 struct uvc_format_desc *fmtdesc;
507 struct uvc_frame *frame;
508 const unsigned char *start = buffer;
509 unsigned int width_multiplier = 1;
510 unsigned int interval;
511 unsigned int i, n;
512 u8 ftype;
513
514 format->type = buffer[2];
515 format->index = buffer[3];
516
517 switch (buffer[2]) {
518 case UVC_VS_FORMAT_UNCOMPRESSED:
519 case UVC_VS_FORMAT_FRAME_BASED:
520 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
521 if (buflen < n) {
522 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
523 "interface %d FORMAT error\n",
524 dev->udev->devnum,
525 alts->desc.bInterfaceNumber);
526 return -EINVAL;
527 }
528
529 /* Find the format descriptor from its GUID. */
530 fmtdesc = uvc_format_by_guid(&buffer[5]);
531
532 if (fmtdesc != NULL) {
533 strscpy(format->name, fmtdesc->name,
534 sizeof(format->name));
535 format->fcc = fmtdesc->fcc;
536 } else {
537 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
538 &buffer[5]);
539 snprintf(format->name, sizeof(format->name), "%pUl\n",
540 &buffer[5]);
541 format->fcc = 0;
542 }
543
544 format->bpp = buffer[21];
545
546 /* Some devices report a format that doesn't match what they
547 * really send.
548 */
549 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
550 if (format->fcc == V4L2_PIX_FMT_YUYV) {
551 strscpy(format->name, "Greyscale 8-bit (Y8 )",
552 sizeof(format->name));
553 format->fcc = V4L2_PIX_FMT_GREY;
554 format->bpp = 8;
555 width_multiplier = 2;
556 }
557 }
558
559 /* Some devices report bpp that doesn't match the format. */
560 if (dev->quirks & UVC_QUIRK_FORCE_BPP) {
561 const struct v4l2_format_info *info =
562 v4l2_format_info(format->fcc);
563
564 if (info) {
565 unsigned int div = info->hdiv * info->vdiv;
566
567 n = info->bpp[0] * div;
568 for (i = 1; i < info->comp_planes; i++)
569 n += info->bpp[i];
570
571 format->bpp = DIV_ROUND_UP(8 * n, div);
572 }
573 }
574
575 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
576 ftype = UVC_VS_FRAME_UNCOMPRESSED;
577 } else {
578 ftype = UVC_VS_FRAME_FRAME_BASED;
579 if (buffer[27])
580 format->flags = UVC_FMT_FLAG_COMPRESSED;
581 }
582 break;
583
584 case UVC_VS_FORMAT_MJPEG:
585 if (buflen < 11) {
586 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
587 "interface %d FORMAT error\n",
588 dev->udev->devnum,
589 alts->desc.bInterfaceNumber);
590 return -EINVAL;
591 }
592
593 strscpy(format->name, "MJPEG", sizeof(format->name));
594 format->fcc = V4L2_PIX_FMT_MJPEG;
595 format->flags = UVC_FMT_FLAG_COMPRESSED;
596 format->bpp = 0;
597 ftype = UVC_VS_FRAME_MJPEG;
598 break;
599
600 case UVC_VS_FORMAT_DV:
601 if (buflen < 9) {
602 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
603 "interface %d FORMAT error\n",
604 dev->udev->devnum,
605 alts->desc.bInterfaceNumber);
606 return -EINVAL;
607 }
608
609 switch (buffer[8] & 0x7f) {
610 case 0:
611 strscpy(format->name, "SD-DV", sizeof(format->name));
612 break;
613 case 1:
614 strscpy(format->name, "SDL-DV", sizeof(format->name));
615 break;
616 case 2:
617 strscpy(format->name, "HD-DV", sizeof(format->name));
618 break;
619 default:
620 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
621 "interface %d: unknown DV format %u\n",
622 dev->udev->devnum,
623 alts->desc.bInterfaceNumber, buffer[8]);
624 return -EINVAL;
625 }
626
627 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
628 sizeof(format->name));
629
630 format->fcc = V4L2_PIX_FMT_DV;
631 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
632 format->bpp = 0;
633 ftype = 0;
634
635 /* Create a dummy frame descriptor. */
636 frame = &format->frame[0];
637 memset(&format->frame[0], 0, sizeof(format->frame[0]));
638 frame->bFrameIntervalType = 1;
639 frame->dwDefaultFrameInterval = 1;
640 frame->dwFrameInterval = *intervals;
641 *(*intervals)++ = 1;
642 format->nframes = 1;
643 break;
644
645 case UVC_VS_FORMAT_MPEG2TS:
646 case UVC_VS_FORMAT_STREAM_BASED:
647 /* Not supported yet. */
648 default:
649 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
650 "interface %d unsupported format %u\n",
651 dev->udev->devnum, alts->desc.bInterfaceNumber,
652 buffer[2]);
653 return -EINVAL;
654 }
655
656 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
657
658 buflen -= buffer[0];
659 buffer += buffer[0];
660
661 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
662 * based formats have frame descriptors.
663 */
664 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
665 buffer[2] == ftype) {
666 frame = &format->frame[format->nframes];
667 if (ftype != UVC_VS_FRAME_FRAME_BASED)
668 n = buflen > 25 ? buffer[25] : 0;
669 else
670 n = buflen > 21 ? buffer[21] : 0;
671
672 n = n ? n : 3;
673
674 if (buflen < 26 + 4*n) {
675 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
676 "interface %d FRAME error\n", dev->udev->devnum,
677 alts->desc.bInterfaceNumber);
678 return -EINVAL;
679 }
680
681 frame->bFrameIndex = buffer[3];
682 frame->bmCapabilities = buffer[4];
683 frame->wWidth = get_unaligned_le16(&buffer[5])
684 * width_multiplier;
685 frame->wHeight = get_unaligned_le16(&buffer[7]);
686 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
687 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
688 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
689 frame->dwMaxVideoFrameBufferSize =
690 get_unaligned_le32(&buffer[17]);
691 frame->dwDefaultFrameInterval =
692 get_unaligned_le32(&buffer[21]);
693 frame->bFrameIntervalType = buffer[25];
694 } else {
695 frame->dwMaxVideoFrameBufferSize = 0;
696 frame->dwDefaultFrameInterval =
697 get_unaligned_le32(&buffer[17]);
698 frame->bFrameIntervalType = buffer[21];
699 }
700 frame->dwFrameInterval = *intervals;
701
702 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
703 * completely. Observed behaviours range from setting the
704 * value to 1.1x the actual frame size to hardwiring the
705 * 16 low bits to 0. This results in a higher than necessary
706 * memory usage as well as a wrong image size information. For
707 * uncompressed formats this can be fixed by computing the
708 * value from the frame size.
709 */
710 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
711 frame->dwMaxVideoFrameBufferSize = format->bpp
712 * frame->wWidth * frame->wHeight / 8;
713
714 /* Some bogus devices report dwMinFrameInterval equal to
715 * dwMaxFrameInterval and have dwFrameIntervalStep set to
716 * zero. Setting all null intervals to 1 fixes the problem and
717 * some other divisions by zero that could happen.
718 */
719 for (i = 0; i < n; ++i) {
720 interval = get_unaligned_le32(&buffer[26+4*i]);
721 *(*intervals)++ = interval ? interval : 1;
722 }
723
724 /* Make sure that the default frame interval stays between
725 * the boundaries.
726 */
727 n -= frame->bFrameIntervalType ? 1 : 2;
728 frame->dwDefaultFrameInterval =
729 min(frame->dwFrameInterval[n],
730 max(frame->dwFrameInterval[0],
731 frame->dwDefaultFrameInterval));
732
733 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
734 frame->bFrameIntervalType = 1;
735 frame->dwFrameInterval[0] =
736 frame->dwDefaultFrameInterval;
737 }
738
739 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
740 frame->wWidth, frame->wHeight,
741 10000000/frame->dwDefaultFrameInterval,
742 (100000000/frame->dwDefaultFrameInterval)%10);
743
744 format->nframes++;
745 buflen -= buffer[0];
746 buffer += buffer[0];
747 }
748
749 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
750 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
751 buflen -= buffer[0];
752 buffer += buffer[0];
753 }
754
755 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
756 buffer[2] == UVC_VS_COLORFORMAT) {
757 if (buflen < 6) {
758 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
759 "interface %d COLORFORMAT error\n",
760 dev->udev->devnum,
761 alts->desc.bInterfaceNumber);
762 return -EINVAL;
763 }
764
765 format->colorspace = uvc_colorspace(buffer[3]);
766 format->xfer_func = uvc_xfer_func(buffer[4]);
767 format->ycbcr_enc = uvc_ycbcr_enc(buffer[5]);
768
769 buflen -= buffer[0];
770 buffer += buffer[0];
771 }
772
773 return buffer - start;
774 }
775
776 static int uvc_parse_streaming(struct uvc_device *dev,
777 struct usb_interface *intf)
778 {
779 struct uvc_streaming *streaming = NULL;
780 struct uvc_format *format;
781 struct uvc_frame *frame;
782 struct usb_host_interface *alts = &intf->altsetting[0];
783 unsigned char *_buffer, *buffer = alts->extra;
784 int _buflen, buflen = alts->extralen;
785 unsigned int nformats = 0, nframes = 0, nintervals = 0;
786 unsigned int size, i, n, p;
787 u32 *interval;
788 u16 psize;
789 int ret = -EINVAL;
790
791 if (intf->cur_altsetting->desc.bInterfaceSubClass
792 != UVC_SC_VIDEOSTREAMING) {
793 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
794 "video streaming interface\n", dev->udev->devnum,
795 intf->altsetting[0].desc.bInterfaceNumber);
796 return -EINVAL;
797 }
798
799 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
800 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
801 "claimed\n", dev->udev->devnum,
802 intf->altsetting[0].desc.bInterfaceNumber);
803 return -EINVAL;
804 }
805
806 streaming = uvc_stream_new(dev, intf);
807 if (streaming == NULL) {
808 usb_driver_release_interface(&uvc_driver.driver, intf);
809 return -ENOMEM;
810 }
811
812 /* The Pico iMage webcam has its class-specific interface descriptors
813 * after the endpoint descriptors.
814 */
815 if (buflen == 0) {
816 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
817 struct usb_host_endpoint *ep = &alts->endpoint[i];
818
819 if (ep->extralen == 0)
820 continue;
821
822 if (ep->extralen > 2 &&
823 ep->extra[1] == USB_DT_CS_INTERFACE) {
824 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
825 "from endpoint %u.\n", i);
826 buffer = alts->endpoint[i].extra;
827 buflen = alts->endpoint[i].extralen;
828 break;
829 }
830 }
831 }
832
833 /* Skip the standard interface descriptors. */
834 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
835 buflen -= buffer[0];
836 buffer += buffer[0];
837 }
838
839 if (buflen <= 2) {
840 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
841 "interface descriptors found.\n");
842 goto error;
843 }
844
845 /* Parse the header descriptor. */
846 switch (buffer[2]) {
847 case UVC_VS_OUTPUT_HEADER:
848 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
849 size = 9;
850 break;
851
852 case UVC_VS_INPUT_HEADER:
853 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
854 size = 13;
855 break;
856
857 default:
858 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
859 "%d HEADER descriptor not found.\n", dev->udev->devnum,
860 alts->desc.bInterfaceNumber);
861 goto error;
862 }
863
864 p = buflen >= 4 ? buffer[3] : 0;
865 n = buflen >= size ? buffer[size-1] : 0;
866
867 if (buflen < size + p*n) {
868 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
869 "interface %d HEADER descriptor is invalid.\n",
870 dev->udev->devnum, alts->desc.bInterfaceNumber);
871 goto error;
872 }
873
874 streaming->header.bNumFormats = p;
875 streaming->header.bEndpointAddress = buffer[6];
876 if (buffer[2] == UVC_VS_INPUT_HEADER) {
877 streaming->header.bmInfo = buffer[7];
878 streaming->header.bTerminalLink = buffer[8];
879 streaming->header.bStillCaptureMethod = buffer[9];
880 streaming->header.bTriggerSupport = buffer[10];
881 streaming->header.bTriggerUsage = buffer[11];
882 } else {
883 streaming->header.bTerminalLink = buffer[7];
884 }
885 streaming->header.bControlSize = n;
886
887 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
888 GFP_KERNEL);
889 if (streaming->header.bmaControls == NULL) {
890 ret = -ENOMEM;
891 goto error;
892 }
893
894 buflen -= buffer[0];
895 buffer += buffer[0];
896
897 _buffer = buffer;
898 _buflen = buflen;
899
900 /* Count the format and frame descriptors. */
901 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
902 switch (_buffer[2]) {
903 case UVC_VS_FORMAT_UNCOMPRESSED:
904 case UVC_VS_FORMAT_MJPEG:
905 case UVC_VS_FORMAT_FRAME_BASED:
906 nformats++;
907 break;
908
909 case UVC_VS_FORMAT_DV:
910 /* DV format has no frame descriptor. We will create a
911 * dummy frame descriptor with a dummy frame interval.
912 */
913 nformats++;
914 nframes++;
915 nintervals++;
916 break;
917
918 case UVC_VS_FORMAT_MPEG2TS:
919 case UVC_VS_FORMAT_STREAM_BASED:
920 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
921 "interface %d FORMAT %u is not supported.\n",
922 dev->udev->devnum,
923 alts->desc.bInterfaceNumber, _buffer[2]);
924 break;
925
926 case UVC_VS_FRAME_UNCOMPRESSED:
927 case UVC_VS_FRAME_MJPEG:
928 nframes++;
929 if (_buflen > 25)
930 nintervals += _buffer[25] ? _buffer[25] : 3;
931 break;
932
933 case UVC_VS_FRAME_FRAME_BASED:
934 nframes++;
935 if (_buflen > 21)
936 nintervals += _buffer[21] ? _buffer[21] : 3;
937 break;
938 }
939
940 _buflen -= _buffer[0];
941 _buffer += _buffer[0];
942 }
943
944 if (nformats == 0) {
945 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
946 "%d has no supported formats defined.\n",
947 dev->udev->devnum, alts->desc.bInterfaceNumber);
948 goto error;
949 }
950
951 size = nformats * sizeof(*format) + nframes * sizeof(*frame)
952 + nintervals * sizeof(*interval);
953 format = kzalloc(size, GFP_KERNEL);
954 if (format == NULL) {
955 ret = -ENOMEM;
956 goto error;
957 }
958
959 frame = (struct uvc_frame *)&format[nformats];
960 interval = (u32 *)&frame[nframes];
961
962 streaming->format = format;
963 streaming->nformats = nformats;
964
965 /* Parse the format descriptors. */
966 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
967 switch (buffer[2]) {
968 case UVC_VS_FORMAT_UNCOMPRESSED:
969 case UVC_VS_FORMAT_MJPEG:
970 case UVC_VS_FORMAT_DV:
971 case UVC_VS_FORMAT_FRAME_BASED:
972 format->frame = frame;
973 ret = uvc_parse_format(dev, streaming, format,
974 &interval, buffer, buflen);
975 if (ret < 0)
976 goto error;
977
978 frame += format->nframes;
979 format++;
980
981 buflen -= ret;
982 buffer += ret;
983 continue;
984
985 default:
986 break;
987 }
988
989 buflen -= buffer[0];
990 buffer += buffer[0];
991 }
992
993 if (buflen)
994 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
995 "%d has %u bytes of trailing descriptor garbage.\n",
996 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
997
998 /* Parse the alternate settings to find the maximum bandwidth. */
999 for (i = 0; i < intf->num_altsetting; ++i) {
1000 struct usb_host_endpoint *ep;
1001 alts = &intf->altsetting[i];
1002 ep = uvc_find_endpoint(alts,
1003 streaming->header.bEndpointAddress);
1004 if (ep == NULL)
1005 continue;
1006
1007 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
1008 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
1009 if (psize > streaming->maxpsize)
1010 streaming->maxpsize = psize;
1011 }
1012
1013 list_add_tail(&streaming->list, &dev->streams);
1014 return 0;
1015
1016 error:
1017 usb_driver_release_interface(&uvc_driver.driver, intf);
1018 uvc_stream_delete(streaming);
1019 return ret;
1020 }
1021
1022 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
1023 unsigned int num_pads, unsigned int extra_size)
1024 {
1025 struct uvc_entity *entity;
1026 unsigned int num_inputs;
1027 unsigned int size;
1028 unsigned int i;
1029
1030 extra_size = roundup(extra_size, sizeof(*entity->pads));
1031 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
1032 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
1033 + num_inputs;
1034 entity = kzalloc(size, GFP_KERNEL);
1035 if (entity == NULL)
1036 return NULL;
1037
1038 entity->id = id;
1039 entity->type = type;
1040
1041 entity->num_links = 0;
1042 entity->num_pads = num_pads;
1043 entity->pads = ((void *)(entity + 1)) + extra_size;
1044
1045 for (i = 0; i < num_inputs; ++i)
1046 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
1047 if (!UVC_ENTITY_IS_OTERM(entity))
1048 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
1049
1050 entity->bNrInPins = num_inputs;
1051 entity->baSourceID = (u8 *)(&entity->pads[num_pads]);
1052
1053 return entity;
1054 }
1055
1056 /* Parse vendor-specific extensions. */
1057 static int uvc_parse_vendor_control(struct uvc_device *dev,
1058 const unsigned char *buffer, int buflen)
1059 {
1060 struct usb_device *udev = dev->udev;
1061 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1062 struct uvc_entity *unit;
1063 unsigned int n, p;
1064 int handled = 0;
1065
1066 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
1067 case 0x046d: /* Logitech */
1068 if (buffer[1] != 0x41 || buffer[2] != 0x01)
1069 break;
1070
1071 /* Logitech implements several vendor specific functions
1072 * through vendor specific extension units (LXU).
1073 *
1074 * The LXU descriptors are similar to XU descriptors
1075 * (see "USB Device Video Class for Video Devices", section
1076 * 3.7.2.6 "Extension Unit Descriptor") with the following
1077 * differences:
1078 *
1079 * ----------------------------------------------------------
1080 * 0 bLength 1 Number
1081 * Size of this descriptor, in bytes: 24+p+n*2
1082 * ----------------------------------------------------------
1083 * 23+p+n bmControlsType N Bitmap
1084 * Individual bits in the set are defined:
1085 * 0: Absolute
1086 * 1: Relative
1087 *
1088 * This bitset is mapped exactly the same as bmControls.
1089 * ----------------------------------------------------------
1090 * 23+p+n*2 bReserved 1 Boolean
1091 * ----------------------------------------------------------
1092 * 24+p+n*2 iExtension 1 Index
1093 * Index of a string descriptor that describes this
1094 * extension unit.
1095 * ----------------------------------------------------------
1096 */
1097 p = buflen >= 22 ? buffer[21] : 0;
1098 n = buflen >= 25 + p ? buffer[22+p] : 0;
1099
1100 if (buflen < 25 + p + 2*n) {
1101 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1102 "interface %d EXTENSION_UNIT error\n",
1103 udev->devnum, alts->desc.bInterfaceNumber);
1104 break;
1105 }
1106
1107 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
1108 p + 1, 2*n);
1109 if (unit == NULL)
1110 return -ENOMEM;
1111
1112 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1113 unit->extension.bNumControls = buffer[20];
1114 memcpy(unit->baSourceID, &buffer[22], p);
1115 unit->extension.bControlSize = buffer[22+p];
1116 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1117 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit)
1118 + n;
1119 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
1120
1121 if (buffer[24+p+2*n] != 0)
1122 usb_string(udev, buffer[24+p+2*n], unit->name,
1123 sizeof(unit->name));
1124 else
1125 sprintf(unit->name, "Extension %u", buffer[3]);
1126
1127 list_add_tail(&unit->list, &dev->entities);
1128 handled = 1;
1129 break;
1130 }
1131
1132 return handled;
1133 }
1134
1135 static int uvc_parse_standard_control(struct uvc_device *dev,
1136 const unsigned char *buffer, int buflen)
1137 {
1138 struct usb_device *udev = dev->udev;
1139 struct uvc_entity *unit, *term;
1140 struct usb_interface *intf;
1141 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1142 unsigned int i, n, p, len;
1143 u16 type;
1144
1145 switch (buffer[2]) {
1146 case UVC_VC_HEADER:
1147 n = buflen >= 12 ? buffer[11] : 0;
1148
1149 if (buflen < 12 + n) {
1150 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1151 "interface %d HEADER error\n", udev->devnum,
1152 alts->desc.bInterfaceNumber);
1153 return -EINVAL;
1154 }
1155
1156 dev->uvc_version = get_unaligned_le16(&buffer[3]);
1157 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
1158
1159 /* Parse all USB Video Streaming interfaces. */
1160 for (i = 0; i < n; ++i) {
1161 intf = usb_ifnum_to_if(udev, buffer[12+i]);
1162 if (intf == NULL) {
1163 uvc_trace(UVC_TRACE_DESCR, "device %d "
1164 "interface %d doesn't exists\n",
1165 udev->devnum, i);
1166 continue;
1167 }
1168
1169 uvc_parse_streaming(dev, intf);
1170 }
1171 break;
1172
1173 case UVC_VC_INPUT_TERMINAL:
1174 if (buflen < 8) {
1175 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1176 "interface %d INPUT_TERMINAL error\n",
1177 udev->devnum, alts->desc.bInterfaceNumber);
1178 return -EINVAL;
1179 }
1180
1181 /*
1182 * Reject invalid terminal types that would cause issues:
1183 *
1184 * - The high byte must be non-zero, otherwise it would be
1185 * confused with a unit.
1186 *
1187 * - Bit 15 must be 0, as we use it internally as a terminal
1188 * direction flag.
1189 *
1190 * Other unknown types are accepted.
1191 */
1192 type = get_unaligned_le16(&buffer[4]);
1193 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) {
1194 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1195 "interface %d INPUT_TERMINAL %d has invalid "
1196 "type 0x%04x, skipping\n", udev->devnum,
1197 alts->desc.bInterfaceNumber,
1198 buffer[3], type);
1199 return 0;
1200 }
1201
1202 n = 0;
1203 p = 0;
1204 len = 8;
1205
1206 if (type == UVC_ITT_CAMERA) {
1207 n = buflen >= 15 ? buffer[14] : 0;
1208 len = 15;
1209
1210 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1211 n = buflen >= 9 ? buffer[8] : 0;
1212 p = buflen >= 10 + n ? buffer[9+n] : 0;
1213 len = 10;
1214 }
1215
1216 if (buflen < len + n + p) {
1217 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1218 "interface %d INPUT_TERMINAL error\n",
1219 udev->devnum, alts->desc.bInterfaceNumber);
1220 return -EINVAL;
1221 }
1222
1223 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1224 1, n + p);
1225 if (term == NULL)
1226 return -ENOMEM;
1227
1228 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1229 term->camera.bControlSize = n;
1230 term->camera.bmControls = (u8 *)term + sizeof(*term);
1231 term->camera.wObjectiveFocalLengthMin =
1232 get_unaligned_le16(&buffer[8]);
1233 term->camera.wObjectiveFocalLengthMax =
1234 get_unaligned_le16(&buffer[10]);
1235 term->camera.wOcularFocalLength =
1236 get_unaligned_le16(&buffer[12]);
1237 memcpy(term->camera.bmControls, &buffer[15], n);
1238 } else if (UVC_ENTITY_TYPE(term) ==
1239 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1240 term->media.bControlSize = n;
1241 term->media.bmControls = (u8 *)term + sizeof(*term);
1242 term->media.bTransportModeSize = p;
1243 term->media.bmTransportModes = (u8 *)term
1244 + sizeof(*term) + n;
1245 memcpy(term->media.bmControls, &buffer[9], n);
1246 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1247 }
1248
1249 if (buffer[7] != 0)
1250 usb_string(udev, buffer[7], term->name,
1251 sizeof(term->name));
1252 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1253 sprintf(term->name, "Camera %u", buffer[3]);
1254 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1255 sprintf(term->name, "Media %u", buffer[3]);
1256 else
1257 sprintf(term->name, "Input %u", buffer[3]);
1258
1259 list_add_tail(&term->list, &dev->entities);
1260 break;
1261
1262 case UVC_VC_OUTPUT_TERMINAL:
1263 if (buflen < 9) {
1264 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1265 "interface %d OUTPUT_TERMINAL error\n",
1266 udev->devnum, alts->desc.bInterfaceNumber);
1267 return -EINVAL;
1268 }
1269
1270 /* Make sure the terminal type MSB is not null, otherwise it
1271 * could be confused with a unit.
1272 */
1273 type = get_unaligned_le16(&buffer[4]);
1274 if ((type & 0xff00) == 0) {
1275 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1276 "interface %d OUTPUT_TERMINAL %d has invalid "
1277 "type 0x%04x, skipping\n", udev->devnum,
1278 alts->desc.bInterfaceNumber, buffer[3], type);
1279 return 0;
1280 }
1281
1282 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1283 1, 0);
1284 if (term == NULL)
1285 return -ENOMEM;
1286
1287 memcpy(term->baSourceID, &buffer[7], 1);
1288
1289 if (buffer[8] != 0)
1290 usb_string(udev, buffer[8], term->name,
1291 sizeof(term->name));
1292 else
1293 sprintf(term->name, "Output %u", buffer[3]);
1294
1295 list_add_tail(&term->list, &dev->entities);
1296 break;
1297
1298 case UVC_VC_SELECTOR_UNIT:
1299 p = buflen >= 5 ? buffer[4] : 0;
1300
1301 if (buflen < 5 || buflen < 6 + p) {
1302 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1303 "interface %d SELECTOR_UNIT error\n",
1304 udev->devnum, alts->desc.bInterfaceNumber);
1305 return -EINVAL;
1306 }
1307
1308 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1309 if (unit == NULL)
1310 return -ENOMEM;
1311
1312 memcpy(unit->baSourceID, &buffer[5], p);
1313
1314 if (buffer[5+p] != 0)
1315 usb_string(udev, buffer[5+p], unit->name,
1316 sizeof(unit->name));
1317 else
1318 sprintf(unit->name, "Selector %u", buffer[3]);
1319
1320 list_add_tail(&unit->list, &dev->entities);
1321 break;
1322
1323 case UVC_VC_PROCESSING_UNIT:
1324 n = buflen >= 8 ? buffer[7] : 0;
1325 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1326
1327 if (buflen < p + n) {
1328 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1329 "interface %d PROCESSING_UNIT error\n",
1330 udev->devnum, alts->desc.bInterfaceNumber);
1331 return -EINVAL;
1332 }
1333
1334 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1335 if (unit == NULL)
1336 return -ENOMEM;
1337
1338 memcpy(unit->baSourceID, &buffer[4], 1);
1339 unit->processing.wMaxMultiplier =
1340 get_unaligned_le16(&buffer[5]);
1341 unit->processing.bControlSize = buffer[7];
1342 unit->processing.bmControls = (u8 *)unit + sizeof(*unit);
1343 memcpy(unit->processing.bmControls, &buffer[8], n);
1344 if (dev->uvc_version >= 0x0110)
1345 unit->processing.bmVideoStandards = buffer[9+n];
1346
1347 if (buffer[8+n] != 0)
1348 usb_string(udev, buffer[8+n], unit->name,
1349 sizeof(unit->name));
1350 else
1351 sprintf(unit->name, "Processing %u", buffer[3]);
1352
1353 list_add_tail(&unit->list, &dev->entities);
1354 break;
1355
1356 case UVC_VC_EXTENSION_UNIT:
1357 p = buflen >= 22 ? buffer[21] : 0;
1358 n = buflen >= 24 + p ? buffer[22+p] : 0;
1359
1360 if (buflen < 24 + p + n) {
1361 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1362 "interface %d EXTENSION_UNIT error\n",
1363 udev->devnum, alts->desc.bInterfaceNumber);
1364 return -EINVAL;
1365 }
1366
1367 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1368 if (unit == NULL)
1369 return -ENOMEM;
1370
1371 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1372 unit->extension.bNumControls = buffer[20];
1373 memcpy(unit->baSourceID, &buffer[22], p);
1374 unit->extension.bControlSize = buffer[22+p];
1375 unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
1376 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1377
1378 if (buffer[23+p+n] != 0)
1379 usb_string(udev, buffer[23+p+n], unit->name,
1380 sizeof(unit->name));
1381 else
1382 sprintf(unit->name, "Extension %u", buffer[3]);
1383
1384 list_add_tail(&unit->list, &dev->entities);
1385 break;
1386
1387 default:
1388 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1389 "descriptor (%u)\n", buffer[2]);
1390 break;
1391 }
1392
1393 return 0;
1394 }
1395
1396 static int uvc_parse_control(struct uvc_device *dev)
1397 {
1398 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1399 unsigned char *buffer = alts->extra;
1400 int buflen = alts->extralen;
1401 int ret;
1402
1403 /* Parse the default alternate setting only, as the UVC specification
1404 * defines a single alternate setting, the default alternate setting
1405 * zero.
1406 */
1407
1408 while (buflen > 2) {
1409 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1410 buffer[1] != USB_DT_CS_INTERFACE)
1411 goto next_descriptor;
1412
1413 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1414 return ret;
1415
1416 next_descriptor:
1417 buflen -= buffer[0];
1418 buffer += buffer[0];
1419 }
1420
1421 /* Check if the optional status endpoint is present. Built-in iSight
1422 * webcams have an interrupt endpoint but spit proprietary data that
1423 * don't conform to the UVC status endpoint messages. Don't try to
1424 * handle the interrupt endpoint for those cameras.
1425 */
1426 if (alts->desc.bNumEndpoints == 1 &&
1427 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1428 struct usb_host_endpoint *ep = &alts->endpoint[0];
1429 struct usb_endpoint_descriptor *desc = &ep->desc;
1430
1431 if (usb_endpoint_is_int_in(desc) &&
1432 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1433 desc->bInterval != 0) {
1434 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1435 "(addr %02x).\n", desc->bEndpointAddress);
1436 dev->int_ep = ep;
1437 }
1438 }
1439
1440 return 0;
1441 }
1442
1443 /* ------------------------------------------------------------------------
1444 * UVC device scan
1445 */
1446
1447 /*
1448 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1449 * and containing the following units:
1450 *
1451 * - one or more Output Terminals (USB Streaming or Display)
1452 * - zero or one Processing Unit
1453 * - zero, one or more single-input Selector Units
1454 * - zero or one multiple-input Selector Units, provided all inputs are
1455 * connected to input terminals
1456 * - zero, one or mode single-input Extension Units
1457 * - one or more Input Terminals (Camera, External or USB Streaming)
1458 *
1459 * The terminal and units must match on of the following structures:
1460 *
1461 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1462 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1463 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1464 *
1465 * +---------+ +---------+ -> OTT_*(0)
1466 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1467 * +---------+ +---------+ -> OTT_*(n)
1468 *
1469 * The Processing Unit and Extension Units can be in any order. Additional
1470 * Extension Units connected to the main chain as single-unit branches are
1471 * also supported. Single-input Selector Units are ignored.
1472 */
1473 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1474 struct uvc_entity *entity)
1475 {
1476 switch (UVC_ENTITY_TYPE(entity)) {
1477 case UVC_VC_EXTENSION_UNIT:
1478 if (uvc_trace_param & UVC_TRACE_PROBE)
1479 printk(KERN_CONT " <- XU %d", entity->id);
1480
1481 if (entity->bNrInPins != 1) {
1482 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1483 "than 1 input pin.\n", entity->id);
1484 return -1;
1485 }
1486
1487 break;
1488
1489 case UVC_VC_PROCESSING_UNIT:
1490 if (uvc_trace_param & UVC_TRACE_PROBE)
1491 printk(KERN_CONT " <- PU %d", entity->id);
1492
1493 if (chain->processing != NULL) {
1494 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1495 "Processing Units in chain.\n");
1496 return -1;
1497 }
1498
1499 chain->processing = entity;
1500 break;
1501
1502 case UVC_VC_SELECTOR_UNIT:
1503 if (uvc_trace_param & UVC_TRACE_PROBE)
1504 printk(KERN_CONT " <- SU %d", entity->id);
1505
1506 /* Single-input selector units are ignored. */
1507 if (entity->bNrInPins == 1)
1508 break;
1509
1510 if (chain->selector != NULL) {
1511 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1512 "Units in chain.\n");
1513 return -1;
1514 }
1515
1516 chain->selector = entity;
1517 break;
1518
1519 case UVC_ITT_VENDOR_SPECIFIC:
1520 case UVC_ITT_CAMERA:
1521 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1522 if (uvc_trace_param & UVC_TRACE_PROBE)
1523 printk(KERN_CONT " <- IT %d\n", entity->id);
1524
1525 break;
1526
1527 case UVC_OTT_VENDOR_SPECIFIC:
1528 case UVC_OTT_DISPLAY:
1529 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1530 if (uvc_trace_param & UVC_TRACE_PROBE)
1531 printk(KERN_CONT " OT %d", entity->id);
1532
1533 break;
1534
1535 case UVC_TT_STREAMING:
1536 if (UVC_ENTITY_IS_ITERM(entity)) {
1537 if (uvc_trace_param & UVC_TRACE_PROBE)
1538 printk(KERN_CONT " <- IT %d\n", entity->id);
1539 } else {
1540 if (uvc_trace_param & UVC_TRACE_PROBE)
1541 printk(KERN_CONT " OT %d", entity->id);
1542 }
1543
1544 break;
1545
1546 default:
1547 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1548 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1549 return -1;
1550 }
1551
1552 list_add_tail(&entity->chain, &chain->entities);
1553 return 0;
1554 }
1555
1556 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1557 struct uvc_entity *entity, struct uvc_entity *prev)
1558 {
1559 struct uvc_entity *forward;
1560 int found;
1561
1562 /* Forward scan */
1563 forward = NULL;
1564 found = 0;
1565
1566 while (1) {
1567 forward = uvc_entity_by_reference(chain->dev, entity->id,
1568 forward);
1569 if (forward == NULL)
1570 break;
1571 if (forward == prev)
1572 continue;
1573 if (forward->chain.next || forward->chain.prev) {
1574 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1575 "entity %d already in chain.\n", forward->id);
1576 return -EINVAL;
1577 }
1578
1579 switch (UVC_ENTITY_TYPE(forward)) {
1580 case UVC_VC_EXTENSION_UNIT:
1581 if (forward->bNrInPins != 1) {
1582 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1583 "has more than 1 input pin.\n",
1584 entity->id);
1585 return -EINVAL;
1586 }
1587
1588 list_add_tail(&forward->chain, &chain->entities);
1589 if (uvc_trace_param & UVC_TRACE_PROBE) {
1590 if (!found)
1591 printk(KERN_CONT " (->");
1592
1593 printk(KERN_CONT " XU %d", forward->id);
1594 found = 1;
1595 }
1596 break;
1597
1598 case UVC_OTT_VENDOR_SPECIFIC:
1599 case UVC_OTT_DISPLAY:
1600 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1601 case UVC_TT_STREAMING:
1602 if (UVC_ENTITY_IS_ITERM(forward)) {
1603 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1604 "terminal %u.\n", forward->id);
1605 return -EINVAL;
1606 }
1607
1608 list_add_tail(&forward->chain, &chain->entities);
1609 if (uvc_trace_param & UVC_TRACE_PROBE) {
1610 if (!found)
1611 printk(KERN_CONT " (->");
1612
1613 printk(KERN_CONT " OT %d", forward->id);
1614 found = 1;
1615 }
1616 break;
1617 }
1618 }
1619 if (found)
1620 printk(KERN_CONT ")");
1621
1622 return 0;
1623 }
1624
1625 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1626 struct uvc_entity **_entity)
1627 {
1628 struct uvc_entity *entity = *_entity;
1629 struct uvc_entity *term;
1630 int id = -EINVAL, i;
1631
1632 switch (UVC_ENTITY_TYPE(entity)) {
1633 case UVC_VC_EXTENSION_UNIT:
1634 case UVC_VC_PROCESSING_UNIT:
1635 id = entity->baSourceID[0];
1636 break;
1637
1638 case UVC_VC_SELECTOR_UNIT:
1639 /* Single-input selector units are ignored. */
1640 if (entity->bNrInPins == 1) {
1641 id = entity->baSourceID[0];
1642 break;
1643 }
1644
1645 if (uvc_trace_param & UVC_TRACE_PROBE)
1646 printk(KERN_CONT " <- IT");
1647
1648 chain->selector = entity;
1649 for (i = 0; i < entity->bNrInPins; ++i) {
1650 id = entity->baSourceID[i];
1651 term = uvc_entity_by_id(chain->dev, id);
1652 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1653 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1654 "input %d isn't connected to an "
1655 "input terminal\n", entity->id, i);
1656 return -1;
1657 }
1658
1659 if (term->chain.next || term->chain.prev) {
1660 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1661 "entity %d already in chain.\n",
1662 term->id);
1663 return -EINVAL;
1664 }
1665
1666 if (uvc_trace_param & UVC_TRACE_PROBE)
1667 printk(KERN_CONT " %d", term->id);
1668
1669 list_add_tail(&term->chain, &chain->entities);
1670 uvc_scan_chain_forward(chain, term, entity);
1671 }
1672
1673 if (uvc_trace_param & UVC_TRACE_PROBE)
1674 printk(KERN_CONT "\n");
1675
1676 id = 0;
1677 break;
1678
1679 case UVC_ITT_VENDOR_SPECIFIC:
1680 case UVC_ITT_CAMERA:
1681 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1682 case UVC_OTT_VENDOR_SPECIFIC:
1683 case UVC_OTT_DISPLAY:
1684 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1685 case UVC_TT_STREAMING:
1686 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1687 break;
1688 }
1689
1690 if (id <= 0) {
1691 *_entity = NULL;
1692 return id;
1693 }
1694
1695 entity = uvc_entity_by_id(chain->dev, id);
1696 if (entity == NULL) {
1697 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1698 "unknown entity %d.\n", id);
1699 return -EINVAL;
1700 }
1701
1702 *_entity = entity;
1703 return 0;
1704 }
1705
1706 static int uvc_scan_chain(struct uvc_video_chain *chain,
1707 struct uvc_entity *term)
1708 {
1709 struct uvc_entity *entity, *prev;
1710
1711 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1712
1713 entity = term;
1714 prev = NULL;
1715
1716 while (entity != NULL) {
1717 /* Entity must not be part of an existing chain */
1718 if (entity->chain.next || entity->chain.prev) {
1719 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1720 "entity %d already in chain.\n", entity->id);
1721 return -EINVAL;
1722 }
1723
1724 /* Process entity */
1725 if (uvc_scan_chain_entity(chain, entity) < 0)
1726 return -EINVAL;
1727
1728 /* Forward scan */
1729 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1730 return -EINVAL;
1731
1732 /* Backward scan */
1733 prev = entity;
1734 if (uvc_scan_chain_backward(chain, &entity) < 0)
1735 return -EINVAL;
1736 }
1737
1738 return 0;
1739 }
1740
1741 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1742 char *buffer)
1743 {
1744 struct uvc_entity *term;
1745 unsigned int nterms = 0;
1746 char *p = buffer;
1747
1748 list_for_each_entry(term, terms, chain) {
1749 if (!UVC_ENTITY_IS_TERM(term) ||
1750 UVC_TERM_DIRECTION(term) != dir)
1751 continue;
1752
1753 if (nterms)
1754 p += sprintf(p, ",");
1755 if (++nterms >= 4) {
1756 p += sprintf(p, "...");
1757 break;
1758 }
1759 p += sprintf(p, "%u", term->id);
1760 }
1761
1762 return p - buffer;
1763 }
1764
1765 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1766 {
1767 static char buffer[43];
1768 char *p = buffer;
1769
1770 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1771 p += sprintf(p, " -> ");
1772 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1773
1774 return buffer;
1775 }
1776
1777 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
1778 {
1779 struct uvc_video_chain *chain;
1780
1781 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1782 if (chain == NULL)
1783 return NULL;
1784
1785 INIT_LIST_HEAD(&chain->entities);
1786 mutex_init(&chain->ctrl_mutex);
1787 chain->dev = dev;
1788 v4l2_prio_init(&chain->prio);
1789
1790 return chain;
1791 }
1792
1793 /*
1794 * Fallback heuristic for devices that don't connect units and terminals in a
1795 * valid chain.
1796 *
1797 * Some devices have invalid baSourceID references, causing uvc_scan_chain()
1798 * to fail, but if we just take the entities we can find and put them together
1799 * in the most sensible chain we can think of, turns out they do work anyway.
1800 * Note: This heuristic assumes there is a single chain.
1801 *
1802 * At the time of writing, devices known to have such a broken chain are
1803 * - Acer Integrated Camera (5986:055a)
1804 * - Realtek rtl157a7 (0bda:57a7)
1805 */
1806 static int uvc_scan_fallback(struct uvc_device *dev)
1807 {
1808 struct uvc_video_chain *chain;
1809 struct uvc_entity *iterm = NULL;
1810 struct uvc_entity *oterm = NULL;
1811 struct uvc_entity *entity;
1812 struct uvc_entity *prev;
1813
1814 /*
1815 * Start by locating the input and output terminals. We only support
1816 * devices with exactly one of each for now.
1817 */
1818 list_for_each_entry(entity, &dev->entities, list) {
1819 if (UVC_ENTITY_IS_ITERM(entity)) {
1820 if (iterm)
1821 return -EINVAL;
1822 iterm = entity;
1823 }
1824
1825 if (UVC_ENTITY_IS_OTERM(entity)) {
1826 if (oterm)
1827 return -EINVAL;
1828 oterm = entity;
1829 }
1830 }
1831
1832 if (iterm == NULL || oterm == NULL)
1833 return -EINVAL;
1834
1835 /* Allocate the chain and fill it. */
1836 chain = uvc_alloc_chain(dev);
1837 if (chain == NULL)
1838 return -ENOMEM;
1839
1840 if (uvc_scan_chain_entity(chain, oterm) < 0)
1841 goto error;
1842
1843 prev = oterm;
1844
1845 /*
1846 * Add all Processing and Extension Units with two pads. The order
1847 * doesn't matter much, use reverse list traversal to connect units in
1848 * UVC descriptor order as we build the chain from output to input. This
1849 * leads to units appearing in the order meant by the manufacturer for
1850 * the cameras known to require this heuristic.
1851 */
1852 list_for_each_entry_reverse(entity, &dev->entities, list) {
1853 if (entity->type != UVC_VC_PROCESSING_UNIT &&
1854 entity->type != UVC_VC_EXTENSION_UNIT)
1855 continue;
1856
1857 if (entity->num_pads != 2)
1858 continue;
1859
1860 if (uvc_scan_chain_entity(chain, entity) < 0)
1861 goto error;
1862
1863 prev->baSourceID[0] = entity->id;
1864 prev = entity;
1865 }
1866
1867 if (uvc_scan_chain_entity(chain, iterm) < 0)
1868 goto error;
1869
1870 prev->baSourceID[0] = iterm->id;
1871
1872 list_add_tail(&chain->list, &dev->chains);
1873
1874 uvc_trace(UVC_TRACE_PROBE,
1875 "Found a video chain by fallback heuristic (%s).\n",
1876 uvc_print_chain(chain));
1877
1878 return 0;
1879
1880 error:
1881 kfree(chain);
1882 return -EINVAL;
1883 }
1884
1885 /*
1886 * Scan the device for video chains and register video devices.
1887 *
1888 * Chains are scanned starting at their output terminals and walked backwards.
1889 */
1890 static int uvc_scan_device(struct uvc_device *dev)
1891 {
1892 struct uvc_video_chain *chain;
1893 struct uvc_entity *term;
1894
1895 list_for_each_entry(term, &dev->entities, list) {
1896 if (!UVC_ENTITY_IS_OTERM(term))
1897 continue;
1898
1899 /* If the terminal is already included in a chain, skip it.
1900 * This can happen for chains that have multiple output
1901 * terminals, where all output terminals beside the first one
1902 * will be inserted in the chain in forward scans.
1903 */
1904 if (term->chain.next || term->chain.prev)
1905 continue;
1906
1907 chain = uvc_alloc_chain(dev);
1908 if (chain == NULL)
1909 return -ENOMEM;
1910
1911 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1912
1913 if (uvc_scan_chain(chain, term) < 0) {
1914 kfree(chain);
1915 continue;
1916 }
1917
1918 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1919 uvc_print_chain(chain));
1920
1921 list_add_tail(&chain->list, &dev->chains);
1922 }
1923
1924 if (list_empty(&dev->chains))
1925 uvc_scan_fallback(dev);
1926
1927 if (list_empty(&dev->chains)) {
1928 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1929 return -1;
1930 }
1931
1932 return 0;
1933 }
1934
1935 /* ------------------------------------------------------------------------
1936 * Video device registration and unregistration
1937 */
1938
1939 /*
1940 * Delete the UVC device.
1941 *
1942 * Called by the kernel when the last reference to the uvc_device structure
1943 * is released.
1944 *
1945 * As this function is called after or during disconnect(), all URBs have
1946 * already been cancelled by the USB core. There is no need to kill the
1947 * interrupt URB manually.
1948 */
1949 static void uvc_delete(struct kref *kref)
1950 {
1951 struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
1952 struct list_head *p, *n;
1953
1954 uvc_status_cleanup(dev);
1955 uvc_ctrl_cleanup_device(dev);
1956
1957 usb_put_intf(dev->intf);
1958 usb_put_dev(dev->udev);
1959
1960 #ifdef CONFIG_MEDIA_CONTROLLER
1961 media_device_cleanup(&dev->mdev);
1962 #endif
1963
1964 list_for_each_safe(p, n, &dev->chains) {
1965 struct uvc_video_chain *chain;
1966 chain = list_entry(p, struct uvc_video_chain, list);
1967 kfree(chain);
1968 }
1969
1970 list_for_each_safe(p, n, &dev->entities) {
1971 struct uvc_entity *entity;
1972 entity = list_entry(p, struct uvc_entity, list);
1973 #ifdef CONFIG_MEDIA_CONTROLLER
1974 uvc_mc_cleanup_entity(entity);
1975 #endif
1976 kfree(entity);
1977 }
1978
1979 list_for_each_safe(p, n, &dev->streams) {
1980 struct uvc_streaming *streaming;
1981 streaming = list_entry(p, struct uvc_streaming, list);
1982 usb_driver_release_interface(&uvc_driver.driver,
1983 streaming->intf);
1984 uvc_stream_delete(streaming);
1985 }
1986
1987 kfree(dev);
1988 }
1989
1990 static void uvc_release(struct video_device *vdev)
1991 {
1992 struct uvc_streaming *stream = video_get_drvdata(vdev);
1993 struct uvc_device *dev = stream->dev;
1994
1995 kref_put(&dev->ref, uvc_delete);
1996 }
1997
1998 /*
1999 * Unregister the video devices.
2000 */
2001 static void uvc_unregister_video(struct uvc_device *dev)
2002 {
2003 struct uvc_streaming *stream;
2004
2005 list_for_each_entry(stream, &dev->streams, list) {
2006 if (!video_is_registered(&stream->vdev))
2007 continue;
2008
2009 video_unregister_device(&stream->vdev);
2010 video_unregister_device(&stream->meta.vdev);
2011
2012 uvc_debugfs_cleanup_stream(stream);
2013 }
2014
2015 uvc_status_unregister(dev);
2016
2017 if (dev->vdev.dev)
2018 v4l2_device_unregister(&dev->vdev);
2019 #ifdef CONFIG_MEDIA_CONTROLLER
2020 if (media_devnode_is_registered(dev->mdev.devnode))
2021 media_device_unregister(&dev->mdev);
2022 #endif
2023 }
2024
2025 int uvc_register_video_device(struct uvc_device *dev,
2026 struct uvc_streaming *stream,
2027 struct video_device *vdev,
2028 struct uvc_video_queue *queue,
2029 enum v4l2_buf_type type,
2030 const struct v4l2_file_operations *fops,
2031 const struct v4l2_ioctl_ops *ioctl_ops)
2032 {
2033 int ret;
2034
2035 /* Initialize the video buffers queue. */
2036 ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
2037 if (ret)
2038 return ret;
2039
2040 /* Register the device with V4L. */
2041
2042 /*
2043 * We already hold a reference to dev->udev. The video device will be
2044 * unregistered before the reference is released, so we don't need to
2045 * get another one.
2046 */
2047 vdev->v4l2_dev = &dev->vdev;
2048 vdev->fops = fops;
2049 vdev->ioctl_ops = ioctl_ops;
2050 vdev->release = uvc_release;
2051 vdev->prio = &stream->chain->prio;
2052 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2053 vdev->vfl_dir = VFL_DIR_TX;
2054 else
2055 vdev->vfl_dir = VFL_DIR_RX;
2056
2057 switch (type) {
2058 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
2059 default:
2060 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
2061 break;
2062 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
2063 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
2064 break;
2065 case V4L2_BUF_TYPE_META_CAPTURE:
2066 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
2067 break;
2068 }
2069
2070 strscpy(vdev->name, dev->name, sizeof(vdev->name));
2071
2072 /*
2073 * Set the driver data before calling video_register_device, otherwise
2074 * the file open() handler might race us.
2075 */
2076 video_set_drvdata(vdev, stream);
2077
2078 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
2079 if (ret < 0) {
2080 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
2081 v4l2_type_names[type], ret);
2082 return ret;
2083 }
2084
2085 kref_get(&dev->ref);
2086 return 0;
2087 }
2088
2089 static int uvc_register_video(struct uvc_device *dev,
2090 struct uvc_streaming *stream)
2091 {
2092 int ret;
2093
2094 /* Initialize the streaming interface with default parameters. */
2095 ret = uvc_video_init(stream);
2096 if (ret < 0) {
2097 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
2098 ret);
2099 return ret;
2100 }
2101
2102 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2103 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
2104 | V4L2_CAP_META_CAPTURE;
2105 else
2106 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
2107
2108 uvc_debugfs_init_stream(stream);
2109
2110 /* Register the device with V4L. */
2111 return uvc_register_video_device(dev, stream, &stream->vdev,
2112 &stream->queue, stream->type,
2113 &uvc_fops, &uvc_ioctl_ops);
2114 }
2115
2116 /*
2117 * Register all video devices in all chains.
2118 */
2119 static int uvc_register_terms(struct uvc_device *dev,
2120 struct uvc_video_chain *chain)
2121 {
2122 struct uvc_streaming *stream;
2123 struct uvc_entity *term;
2124 int ret;
2125
2126 list_for_each_entry(term, &chain->entities, chain) {
2127 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
2128 continue;
2129
2130 stream = uvc_stream_by_id(dev, term->id);
2131 if (stream == NULL) {
2132 uvc_printk(KERN_INFO, "No streaming interface found "
2133 "for terminal %u.", term->id);
2134 continue;
2135 }
2136
2137 stream->chain = chain;
2138 ret = uvc_register_video(dev, stream);
2139 if (ret < 0)
2140 return ret;
2141
2142 /* Register a metadata node, but ignore a possible failure,
2143 * complete registration of video nodes anyway.
2144 */
2145 uvc_meta_register(stream);
2146
2147 term->vdev = &stream->vdev;
2148 }
2149
2150 return 0;
2151 }
2152
2153 static int uvc_register_chains(struct uvc_device *dev)
2154 {
2155 struct uvc_video_chain *chain;
2156 int ret;
2157
2158 list_for_each_entry(chain, &dev->chains, list) {
2159 ret = uvc_register_terms(dev, chain);
2160 if (ret < 0)
2161 return ret;
2162
2163 #ifdef CONFIG_MEDIA_CONTROLLER
2164 ret = uvc_mc_register_entities(chain);
2165 if (ret < 0)
2166 uvc_printk(KERN_INFO,
2167 "Failed to register entities (%d).\n", ret);
2168 #endif
2169 }
2170
2171 return 0;
2172 }
2173
2174 /* ------------------------------------------------------------------------
2175 * USB probe, disconnect, suspend and resume
2176 */
2177
2178 static const struct uvc_device_info uvc_quirk_none = { 0 };
2179
2180 static int uvc_probe(struct usb_interface *intf,
2181 const struct usb_device_id *id)
2182 {
2183 struct usb_device *udev = interface_to_usbdev(intf);
2184 struct uvc_device *dev;
2185 const struct uvc_device_info *info =
2186 (const struct uvc_device_info *)id->driver_info;
2187 int function;
2188 int ret;
2189
2190 if (id->idVendor && id->idProduct)
2191 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
2192 "(%04x:%04x)\n", udev->devpath, id->idVendor,
2193 id->idProduct);
2194 else
2195 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
2196 udev->devpath);
2197
2198 /* Allocate memory for the device and initialize it. */
2199 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2200 if (dev == NULL)
2201 return -ENOMEM;
2202
2203 INIT_LIST_HEAD(&dev->entities);
2204 INIT_LIST_HEAD(&dev->chains);
2205 INIT_LIST_HEAD(&dev->streams);
2206 kref_init(&dev->ref);
2207 atomic_set(&dev->nmappings, 0);
2208 mutex_init(&dev->lock);
2209
2210 dev->udev = usb_get_dev(udev);
2211 dev->intf = usb_get_intf(intf);
2212 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
2213 dev->info = info ? info : &uvc_quirk_none;
2214 dev->quirks = uvc_quirks_param == -1
2215 ? dev->info->quirks : uvc_quirks_param;
2216
2217 if (udev->product != NULL)
2218 strscpy(dev->name, udev->product, sizeof(dev->name));
2219 else
2220 snprintf(dev->name, sizeof(dev->name),
2221 "UVC Camera (%04x:%04x)",
2222 le16_to_cpu(udev->descriptor.idVendor),
2223 le16_to_cpu(udev->descriptor.idProduct));
2224
2225 /*
2226 * Add iFunction or iInterface to names when available as additional
2227 * distinguishers between interfaces. iFunction is prioritized over
2228 * iInterface which matches Windows behavior at the point of writing.
2229 */
2230 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
2231 function = intf->intf_assoc->iFunction;
2232 else
2233 function = intf->cur_altsetting->desc.iInterface;
2234 if (function != 0) {
2235 size_t len;
2236
2237 strlcat(dev->name, ": ", sizeof(dev->name));
2238 len = strlen(dev->name);
2239 usb_string(udev, function, dev->name + len,
2240 sizeof(dev->name) - len);
2241 }
2242
2243 /* Initialize the media device. */
2244 #ifdef CONFIG_MEDIA_CONTROLLER
2245 dev->mdev.dev = &intf->dev;
2246 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
2247 if (udev->serial)
2248 strscpy(dev->mdev.serial, udev->serial,
2249 sizeof(dev->mdev.serial));
2250 usb_make_path(udev, dev->mdev.bus_info, sizeof(dev->mdev.bus_info));
2251 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
2252 media_device_init(&dev->mdev);
2253
2254 dev->vdev.mdev = &dev->mdev;
2255 #endif
2256
2257 /* Parse the Video Class control descriptor. */
2258 if (uvc_parse_control(dev) < 0) {
2259 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
2260 "descriptors.\n");
2261 goto error;
2262 }
2263
2264 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
2265 dev->uvc_version >> 8, dev->uvc_version & 0xff,
2266 udev->product ? udev->product : "<unnamed>",
2267 le16_to_cpu(udev->descriptor.idVendor),
2268 le16_to_cpu(udev->descriptor.idProduct));
2269
2270 if (dev->quirks != dev->info->quirks) {
2271 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
2272 "parameter for testing purpose.\n", dev->quirks);
2273 uvc_printk(KERN_INFO, "Please report required quirks to the "
2274 "linux-uvc-devel mailing list.\n");
2275 }
2276
2277 /* Register the V4L2 device. */
2278 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
2279 goto error;
2280
2281 /* Initialize controls. */
2282 if (uvc_ctrl_init_device(dev) < 0)
2283 goto error;
2284
2285 /* Scan the device for video chains. */
2286 if (uvc_scan_device(dev) < 0)
2287 goto error;
2288
2289 /* Register video device nodes. */
2290 if (uvc_register_chains(dev) < 0)
2291 goto error;
2292
2293 #ifdef CONFIG_MEDIA_CONTROLLER
2294 /* Register the media device node */
2295 if (media_device_register(&dev->mdev) < 0)
2296 goto error;
2297 #endif
2298 /* Save our data pointer in the interface data. */
2299 usb_set_intfdata(intf, dev);
2300
2301 /* Initialize the interrupt URB. */
2302 if ((ret = uvc_status_init(dev)) < 0) {
2303 uvc_printk(KERN_INFO, "Unable to initialize the status "
2304 "endpoint (%d), status interrupt will not be "
2305 "supported.\n", ret);
2306 }
2307
2308 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
2309 usb_enable_autosuspend(udev);
2310 return 0;
2311
2312 error:
2313 uvc_unregister_video(dev);
2314 kref_put(&dev->ref, uvc_delete);
2315 return -ENODEV;
2316 }
2317
2318 static void uvc_disconnect(struct usb_interface *intf)
2319 {
2320 struct uvc_device *dev = usb_get_intfdata(intf);
2321
2322 /* Set the USB interface data to NULL. This can be done outside the
2323 * lock, as there's no other reader.
2324 */
2325 usb_set_intfdata(intf, NULL);
2326
2327 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2328 UVC_SC_VIDEOSTREAMING)
2329 return;
2330
2331 uvc_unregister_video(dev);
2332 kref_put(&dev->ref, uvc_delete);
2333 }
2334
2335 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
2336 {
2337 struct uvc_device *dev = usb_get_intfdata(intf);
2338 struct uvc_streaming *stream;
2339
2340 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
2341 intf->cur_altsetting->desc.bInterfaceNumber);
2342
2343 /* Controls are cached on the fly so they don't need to be saved. */
2344 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2345 UVC_SC_VIDEOCONTROL) {
2346 mutex_lock(&dev->lock);
2347 if (dev->users)
2348 uvc_status_stop(dev);
2349 mutex_unlock(&dev->lock);
2350 return 0;
2351 }
2352
2353 list_for_each_entry(stream, &dev->streams, list) {
2354 if (stream->intf == intf)
2355 return uvc_video_suspend(stream);
2356 }
2357
2358 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2359 "mismatch.\n");
2360 return -EINVAL;
2361 }
2362
2363 static int __uvc_resume(struct usb_interface *intf, int reset)
2364 {
2365 struct uvc_device *dev = usb_get_intfdata(intf);
2366 struct uvc_streaming *stream;
2367 int ret = 0;
2368
2369 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2370 intf->cur_altsetting->desc.bInterfaceNumber);
2371
2372 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2373 UVC_SC_VIDEOCONTROL) {
2374 if (reset) {
2375 ret = uvc_ctrl_restore_values(dev);
2376 if (ret < 0)
2377 return ret;
2378 }
2379
2380 mutex_lock(&dev->lock);
2381 if (dev->users)
2382 ret = uvc_status_start(dev, GFP_NOIO);
2383 mutex_unlock(&dev->lock);
2384
2385 return ret;
2386 }
2387
2388 list_for_each_entry(stream, &dev->streams, list) {
2389 if (stream->intf == intf) {
2390 ret = uvc_video_resume(stream, reset);
2391 if (ret < 0)
2392 uvc_queue_streamoff(&stream->queue,
2393 stream->queue.queue.type);
2394 return ret;
2395 }
2396 }
2397
2398 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2399 "mismatch.\n");
2400 return -EINVAL;
2401 }
2402
2403 static int uvc_resume(struct usb_interface *intf)
2404 {
2405 return __uvc_resume(intf, 0);
2406 }
2407
2408 static int uvc_reset_resume(struct usb_interface *intf)
2409 {
2410 return __uvc_resume(intf, 1);
2411 }
2412
2413 /* ------------------------------------------------------------------------
2414 * Module parameters
2415 */
2416
2417 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
2418 {
2419 if (uvc_clock_param == CLOCK_MONOTONIC)
2420 return sprintf(buffer, "CLOCK_MONOTONIC");
2421 else
2422 return sprintf(buffer, "CLOCK_REALTIME");
2423 }
2424
2425 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
2426 {
2427 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2428 val += strlen("clock_");
2429
2430 if (strcasecmp(val, "monotonic") == 0)
2431 uvc_clock_param = CLOCK_MONOTONIC;
2432 else if (strcasecmp(val, "realtime") == 0)
2433 uvc_clock_param = CLOCK_REALTIME;
2434 else
2435 return -EINVAL;
2436
2437 return 0;
2438 }
2439
2440 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2441 &uvc_clock_param, S_IRUGO|S_IWUSR);
2442 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2443 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
2444 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
2445 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2446 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2447 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2448 MODULE_PARM_DESC(quirks, "Forced device quirks");
2449 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2450 MODULE_PARM_DESC(trace, "Trace level bitmask");
2451 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2452 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2453
2454 /* ------------------------------------------------------------------------
2455 * Driver initialization and cleanup
2456 */
2457
2458 static const struct uvc_device_info uvc_quirk_probe_minmax = {
2459 .quirks = UVC_QUIRK_PROBE_MINMAX,
2460 };
2461
2462 static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
2463 .quirks = UVC_QUIRK_FIX_BANDWIDTH,
2464 };
2465
2466 static const struct uvc_device_info uvc_quirk_probe_def = {
2467 .quirks = UVC_QUIRK_PROBE_DEF,
2468 };
2469
2470 static const struct uvc_device_info uvc_quirk_stream_no_fid = {
2471 .quirks = UVC_QUIRK_STREAM_NO_FID,
2472 };
2473
2474 static const struct uvc_device_info uvc_quirk_force_y8 = {
2475 .quirks = UVC_QUIRK_FORCE_Y8,
2476 };
2477
2478 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
2479 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \
2480 {.meta_format = m}
2481
2482 /*
2483 * The Logitech cameras listed below have their interface class set to
2484 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2485 * though they are compliant.
2486 */
2487 static const struct usb_device_id uvc_ids[] = {
2488 /* LogiLink Wireless Webcam */
2489 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2490 | USB_DEVICE_ID_MATCH_INT_INFO,
2491 .idVendor = 0x0416,
2492 .idProduct = 0xa91a,
2493 .bInterfaceClass = USB_CLASS_VIDEO,
2494 .bInterfaceSubClass = 1,
2495 .bInterfaceProtocol = 0,
2496 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2497 /* Genius eFace 2025 */
2498 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2499 | USB_DEVICE_ID_MATCH_INT_INFO,
2500 .idVendor = 0x0458,
2501 .idProduct = 0x706e,
2502 .bInterfaceClass = USB_CLASS_VIDEO,
2503 .bInterfaceSubClass = 1,
2504 .bInterfaceProtocol = 0,
2505 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2506 /* Microsoft Lifecam NX-6000 */
2507 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2508 | USB_DEVICE_ID_MATCH_INT_INFO,
2509 .idVendor = 0x045e,
2510 .idProduct = 0x00f8,
2511 .bInterfaceClass = USB_CLASS_VIDEO,
2512 .bInterfaceSubClass = 1,
2513 .bInterfaceProtocol = 0,
2514 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2515 /* Microsoft Lifecam NX-3000 */
2516 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2517 | USB_DEVICE_ID_MATCH_INT_INFO,
2518 .idVendor = 0x045e,
2519 .idProduct = 0x0721,
2520 .bInterfaceClass = USB_CLASS_VIDEO,
2521 .bInterfaceSubClass = 1,
2522 .bInterfaceProtocol = 0,
2523 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2524 /* Microsoft Lifecam VX-7000 */
2525 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2526 | USB_DEVICE_ID_MATCH_INT_INFO,
2527 .idVendor = 0x045e,
2528 .idProduct = 0x0723,
2529 .bInterfaceClass = USB_CLASS_VIDEO,
2530 .bInterfaceSubClass = 1,
2531 .bInterfaceProtocol = 0,
2532 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2533 /* Logitech Quickcam Fusion */
2534 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2535 | USB_DEVICE_ID_MATCH_INT_INFO,
2536 .idVendor = 0x046d,
2537 .idProduct = 0x08c1,
2538 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2539 .bInterfaceSubClass = 1,
2540 .bInterfaceProtocol = 0 },
2541 /* Logitech Quickcam Orbit MP */
2542 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2543 | USB_DEVICE_ID_MATCH_INT_INFO,
2544 .idVendor = 0x046d,
2545 .idProduct = 0x08c2,
2546 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2547 .bInterfaceSubClass = 1,
2548 .bInterfaceProtocol = 0 },
2549 /* Logitech Quickcam Pro for Notebook */
2550 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2551 | USB_DEVICE_ID_MATCH_INT_INFO,
2552 .idVendor = 0x046d,
2553 .idProduct = 0x08c3,
2554 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2555 .bInterfaceSubClass = 1,
2556 .bInterfaceProtocol = 0 },
2557 /* Logitech Quickcam Pro 5000 */
2558 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2559 | USB_DEVICE_ID_MATCH_INT_INFO,
2560 .idVendor = 0x046d,
2561 .idProduct = 0x08c5,
2562 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2563 .bInterfaceSubClass = 1,
2564 .bInterfaceProtocol = 0 },
2565 /* Logitech Quickcam OEM Dell Notebook */
2566 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2567 | USB_DEVICE_ID_MATCH_INT_INFO,
2568 .idVendor = 0x046d,
2569 .idProduct = 0x08c6,
2570 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2571 .bInterfaceSubClass = 1,
2572 .bInterfaceProtocol = 0 },
2573 /* Logitech Quickcam OEM Cisco VT Camera II */
2574 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2575 | USB_DEVICE_ID_MATCH_INT_INFO,
2576 .idVendor = 0x046d,
2577 .idProduct = 0x08c7,
2578 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2579 .bInterfaceSubClass = 1,
2580 .bInterfaceProtocol = 0 },
2581 /* Logitech HD Pro Webcam C920 */
2582 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2583 | USB_DEVICE_ID_MATCH_INT_INFO,
2584 .idVendor = 0x046d,
2585 .idProduct = 0x082d,
2586 .bInterfaceClass = USB_CLASS_VIDEO,
2587 .bInterfaceSubClass = 1,
2588 .bInterfaceProtocol = 0,
2589 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
2590 /* Chicony CNF7129 (Asus EEE 100HE) */
2591 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2592 | USB_DEVICE_ID_MATCH_INT_INFO,
2593 .idVendor = 0x04f2,
2594 .idProduct = 0xb071,
2595 .bInterfaceClass = USB_CLASS_VIDEO,
2596 .bInterfaceSubClass = 1,
2597 .bInterfaceProtocol = 0,
2598 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) },
2599 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2600 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2601 | USB_DEVICE_ID_MATCH_INT_INFO,
2602 .idVendor = 0x058f,
2603 .idProduct = 0x3820,
2604 .bInterfaceClass = USB_CLASS_VIDEO,
2605 .bInterfaceSubClass = 1,
2606 .bInterfaceProtocol = 0,
2607 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2608 /* Dell XPS m1530 */
2609 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2610 | USB_DEVICE_ID_MATCH_INT_INFO,
2611 .idVendor = 0x05a9,
2612 .idProduct = 0x2640,
2613 .bInterfaceClass = USB_CLASS_VIDEO,
2614 .bInterfaceSubClass = 1,
2615 .bInterfaceProtocol = 0,
2616 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2617 /* Dell SP2008WFP Monitor */
2618 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2619 | USB_DEVICE_ID_MATCH_INT_INFO,
2620 .idVendor = 0x05a9,
2621 .idProduct = 0x2641,
2622 .bInterfaceClass = USB_CLASS_VIDEO,
2623 .bInterfaceSubClass = 1,
2624 .bInterfaceProtocol = 0,
2625 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2626 /* Dell Alienware X51 */
2627 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2628 | USB_DEVICE_ID_MATCH_INT_INFO,
2629 .idVendor = 0x05a9,
2630 .idProduct = 0x2643,
2631 .bInterfaceClass = USB_CLASS_VIDEO,
2632 .bInterfaceSubClass = 1,
2633 .bInterfaceProtocol = 0,
2634 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2635 /* Dell Studio Hybrid 140g (OmniVision webcam) */
2636 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2637 | USB_DEVICE_ID_MATCH_INT_INFO,
2638 .idVendor = 0x05a9,
2639 .idProduct = 0x264a,
2640 .bInterfaceClass = USB_CLASS_VIDEO,
2641 .bInterfaceSubClass = 1,
2642 .bInterfaceProtocol = 0,
2643 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2644 /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2645 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2646 | USB_DEVICE_ID_MATCH_INT_INFO,
2647 .idVendor = 0x05a9,
2648 .idProduct = 0x7670,
2649 .bInterfaceClass = USB_CLASS_VIDEO,
2650 .bInterfaceSubClass = 1,
2651 .bInterfaceProtocol = 0,
2652 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2653 /* Apple Built-In iSight */
2654 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2655 | USB_DEVICE_ID_MATCH_INT_INFO,
2656 .idVendor = 0x05ac,
2657 .idProduct = 0x8501,
2658 .bInterfaceClass = USB_CLASS_VIDEO,
2659 .bInterfaceSubClass = 1,
2660 .bInterfaceProtocol = 0,
2661 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2662 | UVC_QUIRK_BUILTIN_ISIGHT) },
2663 /* Apple Built-In iSight via iBridge */
2664 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2665 | USB_DEVICE_ID_MATCH_INT_INFO,
2666 .idVendor = 0x05ac,
2667 .idProduct = 0x8600,
2668 .bInterfaceClass = USB_CLASS_VIDEO,
2669 .bInterfaceSubClass = 1,
2670 .bInterfaceProtocol = 0,
2671 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2672 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2673 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2674 | USB_DEVICE_ID_MATCH_INT_INFO,
2675 .idVendor = 0x05c8,
2676 .idProduct = 0x0403,
2677 .bInterfaceClass = USB_CLASS_VIDEO,
2678 .bInterfaceSubClass = 1,
2679 .bInterfaceProtocol = 0,
2680 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2681 /* Genesys Logic USB 2.0 PC Camera */
2682 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2683 | USB_DEVICE_ID_MATCH_INT_INFO,
2684 .idVendor = 0x05e3,
2685 .idProduct = 0x0505,
2686 .bInterfaceClass = USB_CLASS_VIDEO,
2687 .bInterfaceSubClass = 1,
2688 .bInterfaceProtocol = 0,
2689 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2690 /* Hercules Classic Silver */
2691 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2692 | USB_DEVICE_ID_MATCH_INT_INFO,
2693 .idVendor = 0x06f8,
2694 .idProduct = 0x300c,
2695 .bInterfaceClass = USB_CLASS_VIDEO,
2696 .bInterfaceSubClass = 1,
2697 .bInterfaceProtocol = 0,
2698 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2699 /* ViMicro Vega */
2700 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2701 | USB_DEVICE_ID_MATCH_INT_INFO,
2702 .idVendor = 0x0ac8,
2703 .idProduct = 0x332d,
2704 .bInterfaceClass = USB_CLASS_VIDEO,
2705 .bInterfaceSubClass = 1,
2706 .bInterfaceProtocol = 0,
2707 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2708 /* ViMicro - Minoru3D */
2709 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2710 | USB_DEVICE_ID_MATCH_INT_INFO,
2711 .idVendor = 0x0ac8,
2712 .idProduct = 0x3410,
2713 .bInterfaceClass = USB_CLASS_VIDEO,
2714 .bInterfaceSubClass = 1,
2715 .bInterfaceProtocol = 0,
2716 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2717 /* ViMicro Venus - Minoru3D */
2718 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2719 | USB_DEVICE_ID_MATCH_INT_INFO,
2720 .idVendor = 0x0ac8,
2721 .idProduct = 0x3420,
2722 .bInterfaceClass = USB_CLASS_VIDEO,
2723 .bInterfaceSubClass = 1,
2724 .bInterfaceProtocol = 0,
2725 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
2726 /* Ophir Optronics - SPCAM 620U */
2727 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2728 | USB_DEVICE_ID_MATCH_INT_INFO,
2729 .idVendor = 0x0bd3,
2730 .idProduct = 0x0555,
2731 .bInterfaceClass = USB_CLASS_VIDEO,
2732 .bInterfaceSubClass = 1,
2733 .bInterfaceProtocol = 0,
2734 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2735 /* MT6227 */
2736 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2737 | USB_DEVICE_ID_MATCH_INT_INFO,
2738 .idVendor = 0x0e8d,
2739 .idProduct = 0x0004,
2740 .bInterfaceClass = USB_CLASS_VIDEO,
2741 .bInterfaceSubClass = 1,
2742 .bInterfaceProtocol = 0,
2743 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2744 | UVC_QUIRK_PROBE_DEF) },
2745 /* IMC Networks (Medion Akoya) */
2746 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2747 | USB_DEVICE_ID_MATCH_INT_INFO,
2748 .idVendor = 0x13d3,
2749 .idProduct = 0x5103,
2750 .bInterfaceClass = USB_CLASS_VIDEO,
2751 .bInterfaceSubClass = 1,
2752 .bInterfaceProtocol = 0,
2753 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2754 /* JMicron USB2.0 XGA WebCam */
2755 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2756 | USB_DEVICE_ID_MATCH_INT_INFO,
2757 .idVendor = 0x152d,
2758 .idProduct = 0x0310,
2759 .bInterfaceClass = USB_CLASS_VIDEO,
2760 .bInterfaceSubClass = 1,
2761 .bInterfaceProtocol = 0,
2762 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2763 /* Syntek (HP Spartan) */
2764 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2765 | USB_DEVICE_ID_MATCH_INT_INFO,
2766 .idVendor = 0x174f,
2767 .idProduct = 0x5212,
2768 .bInterfaceClass = USB_CLASS_VIDEO,
2769 .bInterfaceSubClass = 1,
2770 .bInterfaceProtocol = 0,
2771 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2772 /* Syntek (Samsung Q310) */
2773 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2774 | USB_DEVICE_ID_MATCH_INT_INFO,
2775 .idVendor = 0x174f,
2776 .idProduct = 0x5931,
2777 .bInterfaceClass = USB_CLASS_VIDEO,
2778 .bInterfaceSubClass = 1,
2779 .bInterfaceProtocol = 0,
2780 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2781 /* Syntek (Packard Bell EasyNote MX52 */
2782 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2783 | USB_DEVICE_ID_MATCH_INT_INFO,
2784 .idVendor = 0x174f,
2785 .idProduct = 0x8a12,
2786 .bInterfaceClass = USB_CLASS_VIDEO,
2787 .bInterfaceSubClass = 1,
2788 .bInterfaceProtocol = 0,
2789 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2790 /* Syntek (Asus F9SG) */
2791 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2792 | USB_DEVICE_ID_MATCH_INT_INFO,
2793 .idVendor = 0x174f,
2794 .idProduct = 0x8a31,
2795 .bInterfaceClass = USB_CLASS_VIDEO,
2796 .bInterfaceSubClass = 1,
2797 .bInterfaceProtocol = 0,
2798 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2799 /* Syntek (Asus U3S) */
2800 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2801 | USB_DEVICE_ID_MATCH_INT_INFO,
2802 .idVendor = 0x174f,
2803 .idProduct = 0x8a33,
2804 .bInterfaceClass = USB_CLASS_VIDEO,
2805 .bInterfaceSubClass = 1,
2806 .bInterfaceProtocol = 0,
2807 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2808 /* Syntek (JAOtech Smart Terminal) */
2809 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2810 | USB_DEVICE_ID_MATCH_INT_INFO,
2811 .idVendor = 0x174f,
2812 .idProduct = 0x8a34,
2813 .bInterfaceClass = USB_CLASS_VIDEO,
2814 .bInterfaceSubClass = 1,
2815 .bInterfaceProtocol = 0,
2816 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2817 /* Miricle 307K */
2818 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2819 | USB_DEVICE_ID_MATCH_INT_INFO,
2820 .idVendor = 0x17dc,
2821 .idProduct = 0x0202,
2822 .bInterfaceClass = USB_CLASS_VIDEO,
2823 .bInterfaceSubClass = 1,
2824 .bInterfaceProtocol = 0,
2825 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2826 /* Lenovo Thinkpad SL400/SL500 */
2827 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2828 | USB_DEVICE_ID_MATCH_INT_INFO,
2829 .idVendor = 0x17ef,
2830 .idProduct = 0x480b,
2831 .bInterfaceClass = USB_CLASS_VIDEO,
2832 .bInterfaceSubClass = 1,
2833 .bInterfaceProtocol = 0,
2834 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
2835 /* Aveo Technology USB 2.0 Camera */
2836 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2837 | USB_DEVICE_ID_MATCH_INT_INFO,
2838 .idVendor = 0x1871,
2839 .idProduct = 0x0306,
2840 .bInterfaceClass = USB_CLASS_VIDEO,
2841 .bInterfaceSubClass = 1,
2842 .bInterfaceProtocol = 0,
2843 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2844 | UVC_QUIRK_PROBE_EXTRAFIELDS) },
2845 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
2846 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2847 | USB_DEVICE_ID_MATCH_INT_INFO,
2848 .idVendor = 0x1871,
2849 .idProduct = 0x0516,
2850 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2851 .bInterfaceSubClass = 1,
2852 .bInterfaceProtocol = 0 },
2853 /* Ecamm Pico iMage */
2854 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2855 | USB_DEVICE_ID_MATCH_INT_INFO,
2856 .idVendor = 0x18cd,
2857 .idProduct = 0xcafe,
2858 .bInterfaceClass = USB_CLASS_VIDEO,
2859 .bInterfaceSubClass = 1,
2860 .bInterfaceProtocol = 0,
2861 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) },
2862 /* Manta MM-353 Plako */
2863 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2864 | USB_DEVICE_ID_MATCH_INT_INFO,
2865 .idVendor = 0x18ec,
2866 .idProduct = 0x3188,
2867 .bInterfaceClass = USB_CLASS_VIDEO,
2868 .bInterfaceSubClass = 1,
2869 .bInterfaceProtocol = 0,
2870 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2871 /* FSC WebCam V30S */
2872 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2873 | USB_DEVICE_ID_MATCH_INT_INFO,
2874 .idVendor = 0x18ec,
2875 .idProduct = 0x3288,
2876 .bInterfaceClass = USB_CLASS_VIDEO,
2877 .bInterfaceSubClass = 1,
2878 .bInterfaceProtocol = 0,
2879 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2880 /* Arkmicro unbranded */
2881 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2882 | USB_DEVICE_ID_MATCH_INT_INFO,
2883 .idVendor = 0x18ec,
2884 .idProduct = 0x3290,
2885 .bInterfaceClass = USB_CLASS_VIDEO,
2886 .bInterfaceSubClass = 1,
2887 .bInterfaceProtocol = 0,
2888 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
2889 /* The Imaging Source USB CCD cameras */
2890 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2891 | USB_DEVICE_ID_MATCH_INT_INFO,
2892 .idVendor = 0x199e,
2893 .idProduct = 0x8102,
2894 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2895 .bInterfaceSubClass = 1,
2896 .bInterfaceProtocol = 0 },
2897 /* Bodelin ProScopeHR */
2898 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2899 | USB_DEVICE_ID_MATCH_DEV_HI
2900 | USB_DEVICE_ID_MATCH_INT_INFO,
2901 .idVendor = 0x19ab,
2902 .idProduct = 0x1000,
2903 .bcdDevice_hi = 0x0126,
2904 .bInterfaceClass = USB_CLASS_VIDEO,
2905 .bInterfaceSubClass = 1,
2906 .bInterfaceProtocol = 0,
2907 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) },
2908 /* MSI StarCam 370i */
2909 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2910 | USB_DEVICE_ID_MATCH_INT_INFO,
2911 .idVendor = 0x1b3b,
2912 .idProduct = 0x2951,
2913 .bInterfaceClass = USB_CLASS_VIDEO,
2914 .bInterfaceSubClass = 1,
2915 .bInterfaceProtocol = 0,
2916 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2917 /* Generalplus Technology Inc. 808 Camera */
2918 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2919 | USB_DEVICE_ID_MATCH_INT_INFO,
2920 .idVendor = 0x1b3f,
2921 .idProduct = 0x2002,
2922 .bInterfaceClass = USB_CLASS_VIDEO,
2923 .bInterfaceSubClass = 1,
2924 .bInterfaceProtocol = 0,
2925 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
2926 /* SiGma Micro USB Web Camera */
2927 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2928 | USB_DEVICE_ID_MATCH_INT_INFO,
2929 .idVendor = 0x1c4f,
2930 .idProduct = 0x3000,
2931 .bInterfaceClass = USB_CLASS_VIDEO,
2932 .bInterfaceSubClass = 1,
2933 .bInterfaceProtocol = 0,
2934 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
2935 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
2936 /* Oculus VR Positional Tracker DK2 */
2937 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2938 | USB_DEVICE_ID_MATCH_INT_INFO,
2939 .idVendor = 0x2833,
2940 .idProduct = 0x0201,
2941 .bInterfaceClass = USB_CLASS_VIDEO,
2942 .bInterfaceSubClass = 1,
2943 .bInterfaceProtocol = 0,
2944 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2945 /* Oculus VR Rift Sensor */
2946 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2947 | USB_DEVICE_ID_MATCH_INT_INFO,
2948 .idVendor = 0x2833,
2949 .idProduct = 0x0211,
2950 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2951 .bInterfaceSubClass = 1,
2952 .bInterfaceProtocol = 0,
2953 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
2954 /* GEO Semiconductor GC6500 */
2955 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2956 | USB_DEVICE_ID_MATCH_INT_INFO,
2957 .idVendor = 0x29fe,
2958 .idProduct = 0x4d53,
2959 .bInterfaceClass = USB_CLASS_VIDEO,
2960 .bInterfaceSubClass = 1,
2961 .bInterfaceProtocol = 0,
2962 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) },
2963 /* Intel RealSense D4M */
2964 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2965 | USB_DEVICE_ID_MATCH_INT_INFO,
2966 .idVendor = 0x8086,
2967 .idProduct = 0x0b03,
2968 .bInterfaceClass = USB_CLASS_VIDEO,
2969 .bInterfaceSubClass = 1,
2970 .bInterfaceProtocol = 0,
2971 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) },
2972 /* Generic USB Video Class */
2973 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
2974 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
2975 {}
2976 };
2977
2978 MODULE_DEVICE_TABLE(usb, uvc_ids);
2979
2980 struct uvc_driver uvc_driver = {
2981 .driver = {
2982 .name = "uvcvideo",
2983 .probe = uvc_probe,
2984 .disconnect = uvc_disconnect,
2985 .suspend = uvc_suspend,
2986 .resume = uvc_resume,
2987 .reset_resume = uvc_reset_resume,
2988 .id_table = uvc_ids,
2989 .supports_autosuspend = 1,
2990 },
2991 };
2992
2993 static int __init uvc_init(void)
2994 {
2995 int ret;
2996
2997 uvc_debugfs_init();
2998
2999 ret = usb_register(&uvc_driver.driver);
3000 if (ret < 0) {
3001 uvc_debugfs_cleanup();
3002 return ret;
3003 }
3004
3005 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
3006 return 0;
3007 }
3008
3009 static void __exit uvc_cleanup(void)
3010 {
3011 usb_deregister(&uvc_driver.driver);
3012 uvc_debugfs_cleanup();
3013 }
3014
3015 module_init(uvc_init);
3016 module_exit(uvc_cleanup);
3017
3018 MODULE_AUTHOR(DRIVER_AUTHOR);
3019 MODULE_DESCRIPTION(DRIVER_DESC);
3020 MODULE_LICENSE("GPL");
3021 MODULE_VERSION(DRIVER_VERSION);
3022
Linux with added FPC-III support