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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-08-13 23:13:22 -0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 15:25:07 -0400
commit0c0d06cac63ee327ceaab4b5ffe2206574ab86bd (patch)
treee759f0dc3185d97f2a0c6b5cd5e32ea6faa74d40 /drivers/media/usb/uvc/uvc_driver.c
parent84cfe9e79bd5ac11c963f4841158454fefa872f6 (diff)
[media] rename most media/video usb drivers to media/usb
Rename all USB drivers with their own directory under drivers/media/video into drivers/media/usb and update the building system. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/usb/uvc/uvc_driver.c')
-rw-r--r--drivers/media/usb/uvc/uvc_driver.c2472
1 files changed, 2472 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
new file mode 100644
index 000000000000..45d7aa162d9d
--- /dev/null
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -0,0 +1,2472 @@
1/*
2 * uvc_driver.c -- USB Video Class driver
3 *
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 */
13
14/*
15 * This driver aims to support video input and ouput devices compliant with the
16 * 'USB Video Class' specification.
17 *
18 * The driver doesn't support the deprecated v4l1 interface. It implements the
19 * mmap capture method only, and doesn't do any image format conversion in
20 * software. If your user-space application doesn't support YUYV or MJPEG, fix
21 * it :-). Please note that the MJPEG data have been stripped from their
22 * Huffman tables (DHT marker), you will need to add it back if your JPEG
23 * codec can't handle MJPEG data.
24 */
25
26#include <linux/atomic.h>
27#include <linux/kernel.h>
28#include <linux/list.h>
29#include <linux/module.h>
30#include <linux/slab.h>
31#include <linux/usb.h>
32#include <linux/videodev2.h>
33#include <linux/vmalloc.h>
34#include <linux/wait.h>
35#include <linux/version.h>
36#include <asm/unaligned.h>
37
38#include <media/v4l2-common.h>
39
40#include "uvcvideo.h"
41
42#define DRIVER_AUTHOR "Laurent Pinchart " \
43 "<laurent.pinchart@ideasonboard.com>"
44#define DRIVER_DESC "USB Video Class driver"
45
46unsigned int uvc_clock_param = CLOCK_MONOTONIC;
47unsigned int uvc_no_drop_param;
48static unsigned int uvc_quirks_param = -1;
49unsigned int uvc_trace_param;
50unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
51
52/* ------------------------------------------------------------------------
53 * Video formats
54 */
55
56static struct uvc_format_desc uvc_fmts[] = {
57 {
58 .name = "YUV 4:2:2 (YUYV)",
59 .guid = UVC_GUID_FORMAT_YUY2,
60 .fcc = V4L2_PIX_FMT_YUYV,
61 },
62 {
63 .name = "YUV 4:2:2 (YUYV)",
64 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
65 .fcc = V4L2_PIX_FMT_YUYV,
66 },
67 {
68 .name = "YUV 4:2:0 (NV12)",
69 .guid = UVC_GUID_FORMAT_NV12,
70 .fcc = V4L2_PIX_FMT_NV12,
71 },
72 {
73 .name = "MJPEG",
74 .guid = UVC_GUID_FORMAT_MJPEG,
75 .fcc = V4L2_PIX_FMT_MJPEG,
76 },
77 {
78 .name = "YVU 4:2:0 (YV12)",
79 .guid = UVC_GUID_FORMAT_YV12,
80 .fcc = V4L2_PIX_FMT_YVU420,
81 },
82 {
83 .name = "YUV 4:2:0 (I420)",
84 .guid = UVC_GUID_FORMAT_I420,
85 .fcc = V4L2_PIX_FMT_YUV420,
86 },
87 {
88 .name = "YUV 4:2:0 (M420)",
89 .guid = UVC_GUID_FORMAT_M420,
90 .fcc = V4L2_PIX_FMT_M420,
91 },
92 {
93 .name = "YUV 4:2:2 (UYVY)",
94 .guid = UVC_GUID_FORMAT_UYVY,
95 .fcc = V4L2_PIX_FMT_UYVY,
96 },
97 {
98 .name = "Greyscale 8-bit (Y800)",
99 .guid = UVC_GUID_FORMAT_Y800,
100 .fcc = V4L2_PIX_FMT_GREY,
101 },
102 {
103 .name = "Greyscale 8-bit (Y8 )",
104 .guid = UVC_GUID_FORMAT_Y8,
105 .fcc = V4L2_PIX_FMT_GREY,
106 },
107 {
108 .name = "Greyscale 10-bit (Y10 )",
109 .guid = UVC_GUID_FORMAT_Y10,
110 .fcc = V4L2_PIX_FMT_Y10,
111 },
112 {
113 .name = "Greyscale 12-bit (Y12 )",
114 .guid = UVC_GUID_FORMAT_Y12,
115 .fcc = V4L2_PIX_FMT_Y12,
116 },
117 {
118 .name = "Greyscale 16-bit (Y16 )",
119 .guid = UVC_GUID_FORMAT_Y16,
120 .fcc = V4L2_PIX_FMT_Y16,
121 },
122 {
123 .name = "RGB Bayer",
124 .guid = UVC_GUID_FORMAT_BY8,
125 .fcc = V4L2_PIX_FMT_SBGGR8,
126 },
127 {
128 .name = "RGB565",
129 .guid = UVC_GUID_FORMAT_RGBP,
130 .fcc = V4L2_PIX_FMT_RGB565,
131 },
132 {
133 .name = "H.264",
134 .guid = UVC_GUID_FORMAT_H264,
135 .fcc = V4L2_PIX_FMT_H264,
136 },
137};
138
139/* ------------------------------------------------------------------------
140 * Utility functions
141 */
142
143struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
144 __u8 epaddr)
145{
146 struct usb_host_endpoint *ep;
147 unsigned int i;
148
149 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
150 ep = &alts->endpoint[i];
151 if (ep->desc.bEndpointAddress == epaddr)
152 return ep;
153 }
154
155 return NULL;
156}
157
158static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
159{
160 unsigned int len = ARRAY_SIZE(uvc_fmts);
161 unsigned int i;
162
163 for (i = 0; i < len; ++i) {
164 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
165 return &uvc_fmts[i];
166 }
167
168 return NULL;
169}
170
171static __u32 uvc_colorspace(const __u8 primaries)
172{
173 static const __u8 colorprimaries[] = {
174 0,
175 V4L2_COLORSPACE_SRGB,
176 V4L2_COLORSPACE_470_SYSTEM_M,
177 V4L2_COLORSPACE_470_SYSTEM_BG,
178 V4L2_COLORSPACE_SMPTE170M,
179 V4L2_COLORSPACE_SMPTE240M,
180 };
181
182 if (primaries < ARRAY_SIZE(colorprimaries))
183 return colorprimaries[primaries];
184
185 return 0;
186}
187
188/* Simplify a fraction using a simple continued fraction decomposition. The
189 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
190 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
191 * arbitrary parameters to remove non-significative terms from the simple
192 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
193 * respectively seems to give nice results.
194 */
195void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
196 unsigned int n_terms, unsigned int threshold)
197{
198 uint32_t *an;
199 uint32_t x, y, r;
200 unsigned int i, n;
201
202 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
203 if (an == NULL)
204 return;
205
206 /* Convert the fraction to a simple continued fraction. See
207 * http://mathforum.org/dr.math/faq/faq.fractions.html
208 * Stop if the current term is bigger than or equal to the given
209 * threshold.
210 */
211 x = *numerator;
212 y = *denominator;
213
214 for (n = 0; n < n_terms && y != 0; ++n) {
215 an[n] = x / y;
216 if (an[n] >= threshold) {
217 if (n < 2)
218 n++;
219 break;
220 }
221
222 r = x - an[n] * y;
223 x = y;
224 y = r;
225 }
226
227 /* Expand the simple continued fraction back to an integer fraction. */
228 x = 0;
229 y = 1;
230
231 for (i = n; i > 0; --i) {
232 r = y;
233 y = an[i-1] * y + x;
234 x = r;
235 }
236
237 *numerator = y;
238 *denominator = x;
239 kfree(an);
240}
241
242/* Convert a fraction to a frame interval in 100ns multiples. The idea here is
243 * to compute numerator / denominator * 10000000 using 32 bit fixed point
244 * arithmetic only.
245 */
246uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
247{
248 uint32_t multiplier;
249
250 /* Saturate the result if the operation would overflow. */
251 if (denominator == 0 ||
252 numerator/denominator >= ((uint32_t)-1)/10000000)
253 return (uint32_t)-1;
254
255 /* Divide both the denominator and the multiplier by two until
256 * numerator * multiplier doesn't overflow. If anyone knows a better
257 * algorithm please let me know.
258 */
259 multiplier = 10000000;
260 while (numerator > ((uint32_t)-1)/multiplier) {
261 multiplier /= 2;
262 denominator /= 2;
263 }
264
265 return denominator ? numerator * multiplier / denominator : 0;
266}
267
268/* ------------------------------------------------------------------------
269 * Terminal and unit management
270 */
271
272struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
273{
274 struct uvc_entity *entity;
275
276 list_for_each_entry(entity, &dev->entities, list) {
277 if (entity->id == id)
278 return entity;
279 }
280
281 return NULL;
282}
283
284static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
285 int id, struct uvc_entity *entity)
286{
287 unsigned int i;
288
289 if (entity == NULL)
290 entity = list_entry(&dev->entities, struct uvc_entity, list);
291
292 list_for_each_entry_continue(entity, &dev->entities, list) {
293 for (i = 0; i < entity->bNrInPins; ++i)
294 if (entity->baSourceID[i] == id)
295 return entity;
296 }
297
298 return NULL;
299}
300
301static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
302{
303 struct uvc_streaming *stream;
304
305 list_for_each_entry(stream, &dev->streams, list) {
306 if (stream->header.bTerminalLink == id)
307 return stream;
308 }
309
310 return NULL;
311}
312
313/* ------------------------------------------------------------------------
314 * Descriptors parsing
315 */
316
317static int uvc_parse_format(struct uvc_device *dev,
318 struct uvc_streaming *streaming, struct uvc_format *format,
319 __u32 **intervals, unsigned char *buffer, int buflen)
320{
321 struct usb_interface *intf = streaming->intf;
322 struct usb_host_interface *alts = intf->cur_altsetting;
323 struct uvc_format_desc *fmtdesc;
324 struct uvc_frame *frame;
325 const unsigned char *start = buffer;
326 unsigned int interval;
327 unsigned int i, n;
328 __u8 ftype;
329
330 format->type = buffer[2];
331 format->index = buffer[3];
332
333 switch (buffer[2]) {
334 case UVC_VS_FORMAT_UNCOMPRESSED:
335 case UVC_VS_FORMAT_FRAME_BASED:
336 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
337 if (buflen < n) {
338 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
339 "interface %d FORMAT error\n",
340 dev->udev->devnum,
341 alts->desc.bInterfaceNumber);
342 return -EINVAL;
343 }
344
345 /* Find the format descriptor from its GUID. */
346 fmtdesc = uvc_format_by_guid(&buffer[5]);
347
348 if (fmtdesc != NULL) {
349 strlcpy(format->name, fmtdesc->name,
350 sizeof format->name);
351 format->fcc = fmtdesc->fcc;
352 } else {
353 uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
354 &buffer[5]);
355 snprintf(format->name, sizeof(format->name), "%pUl\n",
356 &buffer[5]);
357 format->fcc = 0;
358 }
359
360 format->bpp = buffer[21];
361 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
362 ftype = UVC_VS_FRAME_UNCOMPRESSED;
363 } else {
364 ftype = UVC_VS_FRAME_FRAME_BASED;
365 if (buffer[27])
366 format->flags = UVC_FMT_FLAG_COMPRESSED;
367 }
368 break;
369
370 case UVC_VS_FORMAT_MJPEG:
371 if (buflen < 11) {
372 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
373 "interface %d FORMAT error\n",
374 dev->udev->devnum,
375 alts->desc.bInterfaceNumber);
376 return -EINVAL;
377 }
378
379 strlcpy(format->name, "MJPEG", sizeof format->name);
380 format->fcc = V4L2_PIX_FMT_MJPEG;
381 format->flags = UVC_FMT_FLAG_COMPRESSED;
382 format->bpp = 0;
383 ftype = UVC_VS_FRAME_MJPEG;
384 break;
385
386 case UVC_VS_FORMAT_DV:
387 if (buflen < 9) {
388 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
389 "interface %d FORMAT error\n",
390 dev->udev->devnum,
391 alts->desc.bInterfaceNumber);
392 return -EINVAL;
393 }
394
395 switch (buffer[8] & 0x7f) {
396 case 0:
397 strlcpy(format->name, "SD-DV", sizeof format->name);
398 break;
399 case 1:
400 strlcpy(format->name, "SDL-DV", sizeof format->name);
401 break;
402 case 2:
403 strlcpy(format->name, "HD-DV", sizeof format->name);
404 break;
405 default:
406 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
407 "interface %d: unknown DV format %u\n",
408 dev->udev->devnum,
409 alts->desc.bInterfaceNumber, buffer[8]);
410 return -EINVAL;
411 }
412
413 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
414 sizeof format->name);
415
416 format->fcc = V4L2_PIX_FMT_DV;
417 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
418 format->bpp = 0;
419 ftype = 0;
420
421 /* Create a dummy frame descriptor. */
422 frame = &format->frame[0];
423 memset(&format->frame[0], 0, sizeof format->frame[0]);
424 frame->bFrameIntervalType = 1;
425 frame->dwDefaultFrameInterval = 1;
426 frame->dwFrameInterval = *intervals;
427 *(*intervals)++ = 1;
428 format->nframes = 1;
429 break;
430
431 case UVC_VS_FORMAT_MPEG2TS:
432 case UVC_VS_FORMAT_STREAM_BASED:
433 /* Not supported yet. */
434 default:
435 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
436 "interface %d unsupported format %u\n",
437 dev->udev->devnum, alts->desc.bInterfaceNumber,
438 buffer[2]);
439 return -EINVAL;
440 }
441
442 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
443
444 buflen -= buffer[0];
445 buffer += buffer[0];
446
447 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
448 * based formats have frame descriptors.
449 */
450 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
451 buffer[2] == ftype) {
452 frame = &format->frame[format->nframes];
453 if (ftype != UVC_VS_FRAME_FRAME_BASED)
454 n = buflen > 25 ? buffer[25] : 0;
455 else
456 n = buflen > 21 ? buffer[21] : 0;
457
458 n = n ? n : 3;
459
460 if (buflen < 26 + 4*n) {
461 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
462 "interface %d FRAME error\n", dev->udev->devnum,
463 alts->desc.bInterfaceNumber);
464 return -EINVAL;
465 }
466
467 frame->bFrameIndex = buffer[3];
468 frame->bmCapabilities = buffer[4];
469 frame->wWidth = get_unaligned_le16(&buffer[5]);
470 frame->wHeight = get_unaligned_le16(&buffer[7]);
471 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
472 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
473 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
474 frame->dwMaxVideoFrameBufferSize =
475 get_unaligned_le32(&buffer[17]);
476 frame->dwDefaultFrameInterval =
477 get_unaligned_le32(&buffer[21]);
478 frame->bFrameIntervalType = buffer[25];
479 } else {
480 frame->dwMaxVideoFrameBufferSize = 0;
481 frame->dwDefaultFrameInterval =
482 get_unaligned_le32(&buffer[17]);
483 frame->bFrameIntervalType = buffer[21];
484 }
485 frame->dwFrameInterval = *intervals;
486
487 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
488 * completely. Observed behaviours range from setting the
489 * value to 1.1x the actual frame size to hardwiring the
490 * 16 low bits to 0. This results in a higher than necessary
491 * memory usage as well as a wrong image size information. For
492 * uncompressed formats this can be fixed by computing the
493 * value from the frame size.
494 */
495 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
496 frame->dwMaxVideoFrameBufferSize = format->bpp
497 * frame->wWidth * frame->wHeight / 8;
498
499 /* Some bogus devices report dwMinFrameInterval equal to
500 * dwMaxFrameInterval and have dwFrameIntervalStep set to
501 * zero. Setting all null intervals to 1 fixes the problem and
502 * some other divisions by zero that could happen.
503 */
504 for (i = 0; i < n; ++i) {
505 interval = get_unaligned_le32(&buffer[26+4*i]);
506 *(*intervals)++ = interval ? interval : 1;
507 }
508
509 /* Make sure that the default frame interval stays between
510 * the boundaries.
511 */
512 n -= frame->bFrameIntervalType ? 1 : 2;
513 frame->dwDefaultFrameInterval =
514 min(frame->dwFrameInterval[n],
515 max(frame->dwFrameInterval[0],
516 frame->dwDefaultFrameInterval));
517
518 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
519 frame->bFrameIntervalType = 1;
520 frame->dwFrameInterval[0] =
521 frame->dwDefaultFrameInterval;
522 }
523
524 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
525 frame->wWidth, frame->wHeight,
526 10000000/frame->dwDefaultFrameInterval,
527 (100000000/frame->dwDefaultFrameInterval)%10);
528
529 format->nframes++;
530 buflen -= buffer[0];
531 buffer += buffer[0];
532 }
533
534 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
535 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
536 buflen -= buffer[0];
537 buffer += buffer[0];
538 }
539
540 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
541 buffer[2] == UVC_VS_COLORFORMAT) {
542 if (buflen < 6) {
543 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
544 "interface %d COLORFORMAT error\n",
545 dev->udev->devnum,
546 alts->desc.bInterfaceNumber);
547 return -EINVAL;
548 }
549
550 format->colorspace = uvc_colorspace(buffer[3]);
551
552 buflen -= buffer[0];
553 buffer += buffer[0];
554 }
555
556 return buffer - start;
557}
558
559static int uvc_parse_streaming(struct uvc_device *dev,
560 struct usb_interface *intf)
561{
562 struct uvc_streaming *streaming = NULL;
563 struct uvc_format *format;
564 struct uvc_frame *frame;
565 struct usb_host_interface *alts = &intf->altsetting[0];
566 unsigned char *_buffer, *buffer = alts->extra;
567 int _buflen, buflen = alts->extralen;
568 unsigned int nformats = 0, nframes = 0, nintervals = 0;
569 unsigned int size, i, n, p;
570 __u32 *interval;
571 __u16 psize;
572 int ret = -EINVAL;
573
574 if (intf->cur_altsetting->desc.bInterfaceSubClass
575 != UVC_SC_VIDEOSTREAMING) {
576 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
577 "video streaming interface\n", dev->udev->devnum,
578 intf->altsetting[0].desc.bInterfaceNumber);
579 return -EINVAL;
580 }
581
582 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
583 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
584 "claimed\n", dev->udev->devnum,
585 intf->altsetting[0].desc.bInterfaceNumber);
586 return -EINVAL;
587 }
588
589 streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
590 if (streaming == NULL) {
591 usb_driver_release_interface(&uvc_driver.driver, intf);
592 return -EINVAL;
593 }
594
595 mutex_init(&streaming->mutex);
596 streaming->dev = dev;
597 streaming->intf = usb_get_intf(intf);
598 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
599
600 /* The Pico iMage webcam has its class-specific interface descriptors
601 * after the endpoint descriptors.
602 */
603 if (buflen == 0) {
604 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
605 struct usb_host_endpoint *ep = &alts->endpoint[i];
606
607 if (ep->extralen == 0)
608 continue;
609
610 if (ep->extralen > 2 &&
611 ep->extra[1] == USB_DT_CS_INTERFACE) {
612 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
613 "from endpoint %u.\n", i);
614 buffer = alts->endpoint[i].extra;
615 buflen = alts->endpoint[i].extralen;
616 break;
617 }
618 }
619 }
620
621 /* Skip the standard interface descriptors. */
622 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
623 buflen -= buffer[0];
624 buffer += buffer[0];
625 }
626
627 if (buflen <= 2) {
628 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
629 "interface descriptors found.\n");
630 goto error;
631 }
632
633 /* Parse the header descriptor. */
634 switch (buffer[2]) {
635 case UVC_VS_OUTPUT_HEADER:
636 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
637 size = 9;
638 break;
639
640 case UVC_VS_INPUT_HEADER:
641 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
642 size = 13;
643 break;
644
645 default:
646 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
647 "%d HEADER descriptor not found.\n", dev->udev->devnum,
648 alts->desc.bInterfaceNumber);
649 goto error;
650 }
651
652 p = buflen >= 4 ? buffer[3] : 0;
653 n = buflen >= size ? buffer[size-1] : 0;
654
655 if (buflen < size + p*n) {
656 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
657 "interface %d HEADER descriptor is invalid.\n",
658 dev->udev->devnum, alts->desc.bInterfaceNumber);
659 goto error;
660 }
661
662 streaming->header.bNumFormats = p;
663 streaming->header.bEndpointAddress = buffer[6];
664 if (buffer[2] == UVC_VS_INPUT_HEADER) {
665 streaming->header.bmInfo = buffer[7];
666 streaming->header.bTerminalLink = buffer[8];
667 streaming->header.bStillCaptureMethod = buffer[9];
668 streaming->header.bTriggerSupport = buffer[10];
669 streaming->header.bTriggerUsage = buffer[11];
670 } else {
671 streaming->header.bTerminalLink = buffer[7];
672 }
673 streaming->header.bControlSize = n;
674
675 streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
676 GFP_KERNEL);
677 if (streaming->header.bmaControls == NULL) {
678 ret = -ENOMEM;
679 goto error;
680 }
681
682 buflen -= buffer[0];
683 buffer += buffer[0];
684
685 _buffer = buffer;
686 _buflen = buflen;
687
688 /* Count the format and frame descriptors. */
689 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
690 switch (_buffer[2]) {
691 case UVC_VS_FORMAT_UNCOMPRESSED:
692 case UVC_VS_FORMAT_MJPEG:
693 case UVC_VS_FORMAT_FRAME_BASED:
694 nformats++;
695 break;
696
697 case UVC_VS_FORMAT_DV:
698 /* DV format has no frame descriptor. We will create a
699 * dummy frame descriptor with a dummy frame interval.
700 */
701 nformats++;
702 nframes++;
703 nintervals++;
704 break;
705
706 case UVC_VS_FORMAT_MPEG2TS:
707 case UVC_VS_FORMAT_STREAM_BASED:
708 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
709 "interface %d FORMAT %u is not supported.\n",
710 dev->udev->devnum,
711 alts->desc.bInterfaceNumber, _buffer[2]);
712 break;
713
714 case UVC_VS_FRAME_UNCOMPRESSED:
715 case UVC_VS_FRAME_MJPEG:
716 nframes++;
717 if (_buflen > 25)
718 nintervals += _buffer[25] ? _buffer[25] : 3;
719 break;
720
721 case UVC_VS_FRAME_FRAME_BASED:
722 nframes++;
723 if (_buflen > 21)
724 nintervals += _buffer[21] ? _buffer[21] : 3;
725 break;
726 }
727
728 _buflen -= _buffer[0];
729 _buffer += _buffer[0];
730 }
731
732 if (nformats == 0) {
733 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
734 "%d has no supported formats defined.\n",
735 dev->udev->devnum, alts->desc.bInterfaceNumber);
736 goto error;
737 }
738
739 size = nformats * sizeof *format + nframes * sizeof *frame
740 + nintervals * sizeof *interval;
741 format = kzalloc(size, GFP_KERNEL);
742 if (format == NULL) {
743 ret = -ENOMEM;
744 goto error;
745 }
746
747 frame = (struct uvc_frame *)&format[nformats];
748 interval = (__u32 *)&frame[nframes];
749
750 streaming->format = format;
751 streaming->nformats = nformats;
752
753 /* Parse the format descriptors. */
754 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
755 switch (buffer[2]) {
756 case UVC_VS_FORMAT_UNCOMPRESSED:
757 case UVC_VS_FORMAT_MJPEG:
758 case UVC_VS_FORMAT_DV:
759 case UVC_VS_FORMAT_FRAME_BASED:
760 format->frame = frame;
761 ret = uvc_parse_format(dev, streaming, format,
762 &interval, buffer, buflen);
763 if (ret < 0)
764 goto error;
765
766 frame += format->nframes;
767 format++;
768
769 buflen -= ret;
770 buffer += ret;
771 continue;
772
773 default:
774 break;
775 }
776
777 buflen -= buffer[0];
778 buffer += buffer[0];
779 }
780
781 if (buflen)
782 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
783 "%d has %u bytes of trailing descriptor garbage.\n",
784 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
785
786 /* Parse the alternate settings to find the maximum bandwidth. */
787 for (i = 0; i < intf->num_altsetting; ++i) {
788 struct usb_host_endpoint *ep;
789 alts = &intf->altsetting[i];
790 ep = uvc_find_endpoint(alts,
791 streaming->header.bEndpointAddress);
792 if (ep == NULL)
793 continue;
794
795 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
796 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
797 if (psize > streaming->maxpsize)
798 streaming->maxpsize = psize;
799 }
800
801 list_add_tail(&streaming->list, &dev->streams);
802 return 0;
803
804error:
805 usb_driver_release_interface(&uvc_driver.driver, intf);
806 usb_put_intf(intf);
807 kfree(streaming->format);
808 kfree(streaming->header.bmaControls);
809 kfree(streaming);
810 return ret;
811}
812
813static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
814 unsigned int num_pads, unsigned int extra_size)
815{
816 struct uvc_entity *entity;
817 unsigned int num_inputs;
818 unsigned int size;
819 unsigned int i;
820
821 extra_size = ALIGN(extra_size, sizeof(*entity->pads));
822 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
823 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
824 + num_inputs;
825 entity = kzalloc(size, GFP_KERNEL);
826 if (entity == NULL)
827 return NULL;
828
829 entity->id = id;
830 entity->type = type;
831
832 entity->num_links = 0;
833 entity->num_pads = num_pads;
834 entity->pads = ((void *)(entity + 1)) + extra_size;
835
836 for (i = 0; i < num_inputs; ++i)
837 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
838 if (!UVC_ENTITY_IS_OTERM(entity))
839 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
840
841 entity->bNrInPins = num_inputs;
842 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
843
844 return entity;
845}
846
847/* Parse vendor-specific extensions. */
848static int uvc_parse_vendor_control(struct uvc_device *dev,
849 const unsigned char *buffer, int buflen)
850{
851 struct usb_device *udev = dev->udev;
852 struct usb_host_interface *alts = dev->intf->cur_altsetting;
853 struct uvc_entity *unit;
854 unsigned int n, p;
855 int handled = 0;
856
857 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
858 case 0x046d: /* Logitech */
859 if (buffer[1] != 0x41 || buffer[2] != 0x01)
860 break;
861
862 /* Logitech implements several vendor specific functions
863 * through vendor specific extension units (LXU).
864 *
865 * The LXU descriptors are similar to XU descriptors
866 * (see "USB Device Video Class for Video Devices", section
867 * 3.7.2.6 "Extension Unit Descriptor") with the following
868 * differences:
869 *
870 * ----------------------------------------------------------
871 * 0 bLength 1 Number
872 * Size of this descriptor, in bytes: 24+p+n*2
873 * ----------------------------------------------------------
874 * 23+p+n bmControlsType N Bitmap
875 * Individual bits in the set are defined:
876 * 0: Absolute
877 * 1: Relative
878 *
879 * This bitset is mapped exactly the same as bmControls.
880 * ----------------------------------------------------------
881 * 23+p+n*2 bReserved 1 Boolean
882 * ----------------------------------------------------------
883 * 24+p+n*2 iExtension 1 Index
884 * Index of a string descriptor that describes this
885 * extension unit.
886 * ----------------------------------------------------------
887 */
888 p = buflen >= 22 ? buffer[21] : 0;
889 n = buflen >= 25 + p ? buffer[22+p] : 0;
890
891 if (buflen < 25 + p + 2*n) {
892 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
893 "interface %d EXTENSION_UNIT error\n",
894 udev->devnum, alts->desc.bInterfaceNumber);
895 break;
896 }
897
898 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
899 p + 1, 2*n);
900 if (unit == NULL)
901 return -ENOMEM;
902
903 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
904 unit->extension.bNumControls = buffer[20];
905 memcpy(unit->baSourceID, &buffer[22], p);
906 unit->extension.bControlSize = buffer[22+p];
907 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
908 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
909 + n;
910 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
911
912 if (buffer[24+p+2*n] != 0)
913 usb_string(udev, buffer[24+p+2*n], unit->name,
914 sizeof unit->name);
915 else
916 sprintf(unit->name, "Extension %u", buffer[3]);
917
918 list_add_tail(&unit->list, &dev->entities);
919 handled = 1;
920 break;
921 }
922
923 return handled;
924}
925
926static int uvc_parse_standard_control(struct uvc_device *dev,
927 const unsigned char *buffer, int buflen)
928{
929 struct usb_device *udev = dev->udev;
930 struct uvc_entity *unit, *term;
931 struct usb_interface *intf;
932 struct usb_host_interface *alts = dev->intf->cur_altsetting;
933 unsigned int i, n, p, len;
934 __u16 type;
935
936 switch (buffer[2]) {
937 case UVC_VC_HEADER:
938 n = buflen >= 12 ? buffer[11] : 0;
939
940 if (buflen < 12 || buflen < 12 + n) {
941 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
942 "interface %d HEADER error\n", udev->devnum,
943 alts->desc.bInterfaceNumber);
944 return -EINVAL;
945 }
946
947 dev->uvc_version = get_unaligned_le16(&buffer[3]);
948 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
949
950 /* Parse all USB Video Streaming interfaces. */
951 for (i = 0; i < n; ++i) {
952 intf = usb_ifnum_to_if(udev, buffer[12+i]);
953 if (intf == NULL) {
954 uvc_trace(UVC_TRACE_DESCR, "device %d "
955 "interface %d doesn't exists\n",
956 udev->devnum, i);
957 continue;
958 }
959
960 uvc_parse_streaming(dev, intf);
961 }
962 break;
963
964 case UVC_VC_INPUT_TERMINAL:
965 if (buflen < 8) {
966 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
967 "interface %d INPUT_TERMINAL error\n",
968 udev->devnum, alts->desc.bInterfaceNumber);
969 return -EINVAL;
970 }
971
972 /* Make sure the terminal type MSB is not null, otherwise it
973 * could be confused with a unit.
974 */
975 type = get_unaligned_le16(&buffer[4]);
976 if ((type & 0xff00) == 0) {
977 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
978 "interface %d INPUT_TERMINAL %d has invalid "
979 "type 0x%04x, skipping\n", udev->devnum,
980 alts->desc.bInterfaceNumber,
981 buffer[3], type);
982 return 0;
983 }
984
985 n = 0;
986 p = 0;
987 len = 8;
988
989 if (type == UVC_ITT_CAMERA) {
990 n = buflen >= 15 ? buffer[14] : 0;
991 len = 15;
992
993 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
994 n = buflen >= 9 ? buffer[8] : 0;
995 p = buflen >= 10 + n ? buffer[9+n] : 0;
996 len = 10;
997 }
998
999 if (buflen < len + n + p) {
1000 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1001 "interface %d INPUT_TERMINAL error\n",
1002 udev->devnum, alts->desc.bInterfaceNumber);
1003 return -EINVAL;
1004 }
1005
1006 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1007 1, n + p);
1008 if (term == NULL)
1009 return -ENOMEM;
1010
1011 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1012 term->camera.bControlSize = n;
1013 term->camera.bmControls = (__u8 *)term + sizeof *term;
1014 term->camera.wObjectiveFocalLengthMin =
1015 get_unaligned_le16(&buffer[8]);
1016 term->camera.wObjectiveFocalLengthMax =
1017 get_unaligned_le16(&buffer[10]);
1018 term->camera.wOcularFocalLength =
1019 get_unaligned_le16(&buffer[12]);
1020 memcpy(term->camera.bmControls, &buffer[15], n);
1021 } else if (UVC_ENTITY_TYPE(term) ==
1022 UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1023 term->media.bControlSize = n;
1024 term->media.bmControls = (__u8 *)term + sizeof *term;
1025 term->media.bTransportModeSize = p;
1026 term->media.bmTransportModes = (__u8 *)term
1027 + sizeof *term + n;
1028 memcpy(term->media.bmControls, &buffer[9], n);
1029 memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1030 }
1031
1032 if (buffer[7] != 0)
1033 usb_string(udev, buffer[7], term->name,
1034 sizeof term->name);
1035 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1036 sprintf(term->name, "Camera %u", buffer[3]);
1037 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1038 sprintf(term->name, "Media %u", buffer[3]);
1039 else
1040 sprintf(term->name, "Input %u", buffer[3]);
1041
1042 list_add_tail(&term->list, &dev->entities);
1043 break;
1044
1045 case UVC_VC_OUTPUT_TERMINAL:
1046 if (buflen < 9) {
1047 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1048 "interface %d OUTPUT_TERMINAL error\n",
1049 udev->devnum, alts->desc.bInterfaceNumber);
1050 return -EINVAL;
1051 }
1052
1053 /* Make sure the terminal type MSB is not null, otherwise it
1054 * could be confused with a unit.
1055 */
1056 type = get_unaligned_le16(&buffer[4]);
1057 if ((type & 0xff00) == 0) {
1058 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1059 "interface %d OUTPUT_TERMINAL %d has invalid "
1060 "type 0x%04x, skipping\n", udev->devnum,
1061 alts->desc.bInterfaceNumber, buffer[3], type);
1062 return 0;
1063 }
1064
1065 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1066 1, 0);
1067 if (term == NULL)
1068 return -ENOMEM;
1069
1070 memcpy(term->baSourceID, &buffer[7], 1);
1071
1072 if (buffer[8] != 0)
1073 usb_string(udev, buffer[8], term->name,
1074 sizeof term->name);
1075 else
1076 sprintf(term->name, "Output %u", buffer[3]);
1077
1078 list_add_tail(&term->list, &dev->entities);
1079 break;
1080
1081 case UVC_VC_SELECTOR_UNIT:
1082 p = buflen >= 5 ? buffer[4] : 0;
1083
1084 if (buflen < 5 || buflen < 6 + p) {
1085 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1086 "interface %d SELECTOR_UNIT error\n",
1087 udev->devnum, alts->desc.bInterfaceNumber);
1088 return -EINVAL;
1089 }
1090
1091 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1092 if (unit == NULL)
1093 return -ENOMEM;
1094
1095 memcpy(unit->baSourceID, &buffer[5], p);
1096
1097 if (buffer[5+p] != 0)
1098 usb_string(udev, buffer[5+p], unit->name,
1099 sizeof unit->name);
1100 else
1101 sprintf(unit->name, "Selector %u", buffer[3]);
1102
1103 list_add_tail(&unit->list, &dev->entities);
1104 break;
1105
1106 case UVC_VC_PROCESSING_UNIT:
1107 n = buflen >= 8 ? buffer[7] : 0;
1108 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1109
1110 if (buflen < p + n) {
1111 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1112 "interface %d PROCESSING_UNIT error\n",
1113 udev->devnum, alts->desc.bInterfaceNumber);
1114 return -EINVAL;
1115 }
1116
1117 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1118 if (unit == NULL)
1119 return -ENOMEM;
1120
1121 memcpy(unit->baSourceID, &buffer[4], 1);
1122 unit->processing.wMaxMultiplier =
1123 get_unaligned_le16(&buffer[5]);
1124 unit->processing.bControlSize = buffer[7];
1125 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1126 memcpy(unit->processing.bmControls, &buffer[8], n);
1127 if (dev->uvc_version >= 0x0110)
1128 unit->processing.bmVideoStandards = buffer[9+n];
1129
1130 if (buffer[8+n] != 0)
1131 usb_string(udev, buffer[8+n], unit->name,
1132 sizeof unit->name);
1133 else
1134 sprintf(unit->name, "Processing %u", buffer[3]);
1135
1136 list_add_tail(&unit->list, &dev->entities);
1137 break;
1138
1139 case UVC_VC_EXTENSION_UNIT:
1140 p = buflen >= 22 ? buffer[21] : 0;
1141 n = buflen >= 24 + p ? buffer[22+p] : 0;
1142
1143 if (buflen < 24 + p + n) {
1144 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1145 "interface %d EXTENSION_UNIT error\n",
1146 udev->devnum, alts->desc.bInterfaceNumber);
1147 return -EINVAL;
1148 }
1149
1150 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1151 if (unit == NULL)
1152 return -ENOMEM;
1153
1154 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1155 unit->extension.bNumControls = buffer[20];
1156 memcpy(unit->baSourceID, &buffer[22], p);
1157 unit->extension.bControlSize = buffer[22+p];
1158 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
1159 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1160
1161 if (buffer[23+p+n] != 0)
1162 usb_string(udev, buffer[23+p+n], unit->name,
1163 sizeof unit->name);
1164 else
1165 sprintf(unit->name, "Extension %u", buffer[3]);
1166
1167 list_add_tail(&unit->list, &dev->entities);
1168 break;
1169
1170 default:
1171 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1172 "descriptor (%u)\n", buffer[2]);
1173 break;
1174 }
1175
1176 return 0;
1177}
1178
1179static int uvc_parse_control(struct uvc_device *dev)
1180{
1181 struct usb_host_interface *alts = dev->intf->cur_altsetting;
1182 unsigned char *buffer = alts->extra;
1183 int buflen = alts->extralen;
1184 int ret;
1185
1186 /* Parse the default alternate setting only, as the UVC specification
1187 * defines a single alternate setting, the default alternate setting
1188 * zero.
1189 */
1190
1191 while (buflen > 2) {
1192 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1193 buffer[1] != USB_DT_CS_INTERFACE)
1194 goto next_descriptor;
1195
1196 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1197 return ret;
1198
1199next_descriptor:
1200 buflen -= buffer[0];
1201 buffer += buffer[0];
1202 }
1203
1204 /* Check if the optional status endpoint is present. Built-in iSight
1205 * webcams have an interrupt endpoint but spit proprietary data that
1206 * don't conform to the UVC status endpoint messages. Don't try to
1207 * handle the interrupt endpoint for those cameras.
1208 */
1209 if (alts->desc.bNumEndpoints == 1 &&
1210 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1211 struct usb_host_endpoint *ep = &alts->endpoint[0];
1212 struct usb_endpoint_descriptor *desc = &ep->desc;
1213
1214 if (usb_endpoint_is_int_in(desc) &&
1215 le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1216 desc->bInterval != 0) {
1217 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1218 "(addr %02x).\n", desc->bEndpointAddress);
1219 dev->int_ep = ep;
1220 }
1221 }
1222
1223 return 0;
1224}
1225
1226/* ------------------------------------------------------------------------
1227 * UVC device scan
1228 */
1229
1230/*
1231 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1232 * and containing the following units:
1233 *
1234 * - one or more Output Terminals (USB Streaming or Display)
1235 * - zero or one Processing Unit
1236 * - zero, one or more single-input Selector Units
1237 * - zero or one multiple-input Selector Units, provided all inputs are
1238 * connected to input terminals
1239 * - zero, one or mode single-input Extension Units
1240 * - one or more Input Terminals (Camera, External or USB Streaming)
1241 *
1242 * The terminal and units must match on of the following structures:
1243 *
1244 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1245 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1246 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1247 *
1248 * +---------+ +---------+ -> OTT_*(0)
1249 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1250 * +---------+ +---------+ -> OTT_*(n)
1251 *
1252 * The Processing Unit and Extension Units can be in any order. Additional
1253 * Extension Units connected to the main chain as single-unit branches are
1254 * also supported. Single-input Selector Units are ignored.
1255 */
1256static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1257 struct uvc_entity *entity)
1258{
1259 switch (UVC_ENTITY_TYPE(entity)) {
1260 case UVC_VC_EXTENSION_UNIT:
1261 if (uvc_trace_param & UVC_TRACE_PROBE)
1262 printk(" <- XU %d", entity->id);
1263
1264 if (entity->bNrInPins != 1) {
1265 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1266 "than 1 input pin.\n", entity->id);
1267 return -1;
1268 }
1269
1270 break;
1271
1272 case UVC_VC_PROCESSING_UNIT:
1273 if (uvc_trace_param & UVC_TRACE_PROBE)
1274 printk(" <- PU %d", entity->id);
1275
1276 if (chain->processing != NULL) {
1277 uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1278 "Processing Units in chain.\n");
1279 return -1;
1280 }
1281
1282 chain->processing = entity;
1283 break;
1284
1285 case UVC_VC_SELECTOR_UNIT:
1286 if (uvc_trace_param & UVC_TRACE_PROBE)
1287 printk(" <- SU %d", entity->id);
1288
1289 /* Single-input selector units are ignored. */
1290 if (entity->bNrInPins == 1)
1291 break;
1292
1293 if (chain->selector != NULL) {
1294 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1295 "Units in chain.\n");
1296 return -1;
1297 }
1298
1299 chain->selector = entity;
1300 break;
1301
1302 case UVC_ITT_VENDOR_SPECIFIC:
1303 case UVC_ITT_CAMERA:
1304 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1305 if (uvc_trace_param & UVC_TRACE_PROBE)
1306 printk(" <- IT %d\n", entity->id);
1307
1308 break;
1309
1310 case UVC_OTT_VENDOR_SPECIFIC:
1311 case UVC_OTT_DISPLAY:
1312 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1313 if (uvc_trace_param & UVC_TRACE_PROBE)
1314 printk(" OT %d", entity->id);
1315
1316 break;
1317
1318 case UVC_TT_STREAMING:
1319 if (UVC_ENTITY_IS_ITERM(entity)) {
1320 if (uvc_trace_param & UVC_TRACE_PROBE)
1321 printk(" <- IT %d\n", entity->id);
1322 } else {
1323 if (uvc_trace_param & UVC_TRACE_PROBE)
1324 printk(" OT %d", entity->id);
1325 }
1326
1327 break;
1328
1329 default:
1330 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1331 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1332 return -1;
1333 }
1334
1335 list_add_tail(&entity->chain, &chain->entities);
1336 return 0;
1337}
1338
1339static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1340 struct uvc_entity *entity, struct uvc_entity *prev)
1341{
1342 struct uvc_entity *forward;
1343 int found;
1344
1345 /* Forward scan */
1346 forward = NULL;
1347 found = 0;
1348
1349 while (1) {
1350 forward = uvc_entity_by_reference(chain->dev, entity->id,
1351 forward);
1352 if (forward == NULL)
1353 break;
1354 if (forward == prev)
1355 continue;
1356
1357 switch (UVC_ENTITY_TYPE(forward)) {
1358 case UVC_VC_EXTENSION_UNIT:
1359 if (forward->bNrInPins != 1) {
1360 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1361 "has more than 1 input pin.\n",
1362 entity->id);
1363 return -EINVAL;
1364 }
1365
1366 list_add_tail(&forward->chain, &chain->entities);
1367 if (uvc_trace_param & UVC_TRACE_PROBE) {
1368 if (!found)
1369 printk(" (->");
1370
1371 printk(" XU %d", forward->id);
1372 found = 1;
1373 }
1374 break;
1375
1376 case UVC_OTT_VENDOR_SPECIFIC:
1377 case UVC_OTT_DISPLAY:
1378 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1379 case UVC_TT_STREAMING:
1380 if (UVC_ENTITY_IS_ITERM(forward)) {
1381 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1382 "terminal %u.\n", forward->id);
1383 return -EINVAL;
1384 }
1385
1386 list_add_tail(&forward->chain, &chain->entities);
1387 if (uvc_trace_param & UVC_TRACE_PROBE) {
1388 if (!found)
1389 printk(" (->");
1390
1391 printk(" OT %d", forward->id);
1392 found = 1;
1393 }
1394 break;
1395 }
1396 }
1397 if (found)
1398 printk(")");
1399
1400 return 0;
1401}
1402
1403static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1404 struct uvc_entity **_entity)
1405{
1406 struct uvc_entity *entity = *_entity;
1407 struct uvc_entity *term;
1408 int id = -EINVAL, i;
1409
1410 switch (UVC_ENTITY_TYPE(entity)) {
1411 case UVC_VC_EXTENSION_UNIT:
1412 case UVC_VC_PROCESSING_UNIT:
1413 id = entity->baSourceID[0];
1414 break;
1415
1416 case UVC_VC_SELECTOR_UNIT:
1417 /* Single-input selector units are ignored. */
1418 if (entity->bNrInPins == 1) {
1419 id = entity->baSourceID[0];
1420 break;
1421 }
1422
1423 if (uvc_trace_param & UVC_TRACE_PROBE)
1424 printk(" <- IT");
1425
1426 chain->selector = entity;
1427 for (i = 0; i < entity->bNrInPins; ++i) {
1428 id = entity->baSourceID[i];
1429 term = uvc_entity_by_id(chain->dev, id);
1430 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1431 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1432 "input %d isn't connected to an "
1433 "input terminal\n", entity->id, i);
1434 return -1;
1435 }
1436
1437 if (uvc_trace_param & UVC_TRACE_PROBE)
1438 printk(" %d", term->id);
1439
1440 list_add_tail(&term->chain, &chain->entities);
1441 uvc_scan_chain_forward(chain, term, entity);
1442 }
1443
1444 if (uvc_trace_param & UVC_TRACE_PROBE)
1445 printk("\n");
1446
1447 id = 0;
1448 break;
1449
1450 case UVC_ITT_VENDOR_SPECIFIC:
1451 case UVC_ITT_CAMERA:
1452 case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1453 case UVC_OTT_VENDOR_SPECIFIC:
1454 case UVC_OTT_DISPLAY:
1455 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1456 case UVC_TT_STREAMING:
1457 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1458 break;
1459 }
1460
1461 if (id <= 0) {
1462 *_entity = NULL;
1463 return id;
1464 }
1465
1466 entity = uvc_entity_by_id(chain->dev, id);
1467 if (entity == NULL) {
1468 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1469 "unknown entity %d.\n", id);
1470 return -EINVAL;
1471 }
1472
1473 *_entity = entity;
1474 return 0;
1475}
1476
1477static int uvc_scan_chain(struct uvc_video_chain *chain,
1478 struct uvc_entity *term)
1479{
1480 struct uvc_entity *entity, *prev;
1481
1482 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1483
1484 entity = term;
1485 prev = NULL;
1486
1487 while (entity != NULL) {
1488 /* Entity must not be part of an existing chain */
1489 if (entity->chain.next || entity->chain.prev) {
1490 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1491 "entity %d already in chain.\n", entity->id);
1492 return -EINVAL;
1493 }
1494
1495 /* Process entity */
1496 if (uvc_scan_chain_entity(chain, entity) < 0)
1497 return -EINVAL;
1498
1499 /* Forward scan */
1500 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1501 return -EINVAL;
1502
1503 /* Backward scan */
1504 prev = entity;
1505 if (uvc_scan_chain_backward(chain, &entity) < 0)
1506 return -EINVAL;
1507 }
1508
1509 return 0;
1510}
1511
1512static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1513 char *buffer)
1514{
1515 struct uvc_entity *term;
1516 unsigned int nterms = 0;
1517 char *p = buffer;
1518
1519 list_for_each_entry(term, terms, chain) {
1520 if (!UVC_ENTITY_IS_TERM(term) ||
1521 UVC_TERM_DIRECTION(term) != dir)
1522 continue;
1523
1524 if (nterms)
1525 p += sprintf(p, ",");
1526 if (++nterms >= 4) {
1527 p += sprintf(p, "...");
1528 break;
1529 }
1530 p += sprintf(p, "%u", term->id);
1531 }
1532
1533 return p - buffer;
1534}
1535
1536static const char *uvc_print_chain(struct uvc_video_chain *chain)
1537{
1538 static char buffer[43];
1539 char *p = buffer;
1540
1541 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1542 p += sprintf(p, " -> ");
1543 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1544
1545 return buffer;
1546}
1547
1548/*
1549 * Scan the device for video chains and register video devices.
1550 *
1551 * Chains are scanned starting at their output terminals and walked backwards.
1552 */
1553static int uvc_scan_device(struct uvc_device *dev)
1554{
1555 struct uvc_video_chain *chain;
1556 struct uvc_entity *term;
1557
1558 list_for_each_entry(term, &dev->entities, list) {
1559 if (!UVC_ENTITY_IS_OTERM(term))
1560 continue;
1561
1562 /* If the terminal is already included in a chain, skip it.
1563 * This can happen for chains that have multiple output
1564 * terminals, where all output terminals beside the first one
1565 * will be inserted in the chain in forward scans.
1566 */
1567 if (term->chain.next || term->chain.prev)
1568 continue;
1569
1570 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1571 if (chain == NULL)
1572 return -ENOMEM;
1573
1574 INIT_LIST_HEAD(&chain->entities);
1575 mutex_init(&chain->ctrl_mutex);
1576 chain->dev = dev;
1577
1578 if (uvc_scan_chain(chain, term) < 0) {
1579 kfree(chain);
1580 continue;
1581 }
1582
1583 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1584 uvc_print_chain(chain));
1585
1586 list_add_tail(&chain->list, &dev->chains);
1587 }
1588
1589 if (list_empty(&dev->chains)) {
1590 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1591 return -1;
1592 }
1593
1594 return 0;
1595}
1596
1597/* ------------------------------------------------------------------------
1598 * Video device registration and unregistration
1599 */
1600
1601/*
1602 * Delete the UVC device.
1603 *
1604 * Called by the kernel when the last reference to the uvc_device structure
1605 * is released.
1606 *
1607 * As this function is called after or during disconnect(), all URBs have
1608 * already been canceled by the USB core. There is no need to kill the
1609 * interrupt URB manually.
1610 */
1611static void uvc_delete(struct uvc_device *dev)
1612{
1613 struct list_head *p, *n;
1614
1615 usb_put_intf(dev->intf);
1616 usb_put_dev(dev->udev);
1617
1618 uvc_status_cleanup(dev);
1619 uvc_ctrl_cleanup_device(dev);
1620
1621 if (dev->vdev.dev)
1622 v4l2_device_unregister(&dev->vdev);
1623#ifdef CONFIG_MEDIA_CONTROLLER
1624 if (media_devnode_is_registered(&dev->mdev.devnode))
1625 media_device_unregister(&dev->mdev);
1626#endif
1627
1628 list_for_each_safe(p, n, &dev->chains) {
1629 struct uvc_video_chain *chain;
1630 chain = list_entry(p, struct uvc_video_chain, list);
1631 kfree(chain);
1632 }
1633
1634 list_for_each_safe(p, n, &dev->entities) {
1635 struct uvc_entity *entity;
1636 entity = list_entry(p, struct uvc_entity, list);
1637#ifdef CONFIG_MEDIA_CONTROLLER
1638 uvc_mc_cleanup_entity(entity);
1639#endif
1640 if (entity->vdev) {
1641 video_device_release(entity->vdev);
1642 entity->vdev = NULL;
1643 }
1644 kfree(entity);
1645 }
1646
1647 list_for_each_safe(p, n, &dev->streams) {
1648 struct uvc_streaming *streaming;
1649 streaming = list_entry(p, struct uvc_streaming, list);
1650 usb_driver_release_interface(&uvc_driver.driver,
1651 streaming->intf);
1652 usb_put_intf(streaming->intf);
1653 kfree(streaming->format);
1654 kfree(streaming->header.bmaControls);
1655 kfree(streaming);
1656 }
1657
1658 kfree(dev);
1659}
1660
1661static void uvc_release(struct video_device *vdev)
1662{
1663 struct uvc_streaming *stream = video_get_drvdata(vdev);
1664 struct uvc_device *dev = stream->dev;
1665
1666 /* Decrement the registered streams count and delete the device when it
1667 * reaches zero.
1668 */
1669 if (atomic_dec_and_test(&dev->nstreams))
1670 uvc_delete(dev);
1671}
1672
1673/*
1674 * Unregister the video devices.
1675 */
1676static void uvc_unregister_video(struct uvc_device *dev)
1677{
1678 struct uvc_streaming *stream;
1679
1680 /* Unregistering all video devices might result in uvc_delete() being
1681 * called from inside the loop if there's no open file handle. To avoid
1682 * that, increment the stream count before iterating over the streams
1683 * and decrement it when done.
1684 */
1685 atomic_inc(&dev->nstreams);
1686
1687 list_for_each_entry(stream, &dev->streams, list) {
1688 if (stream->vdev == NULL)
1689 continue;
1690
1691 video_unregister_device(stream->vdev);
1692 stream->vdev = NULL;
1693
1694 uvc_debugfs_cleanup_stream(stream);
1695 }
1696
1697 /* Decrement the stream count and call uvc_delete explicitly if there
1698 * are no stream left.
1699 */
1700 if (atomic_dec_and_test(&dev->nstreams))
1701 uvc_delete(dev);
1702}
1703
1704static int uvc_register_video(struct uvc_device *dev,
1705 struct uvc_streaming *stream)
1706{
1707 struct video_device *vdev;
1708 int ret;
1709
1710 /* Initialize the streaming interface with default streaming
1711 * parameters.
1712 */
1713 ret = uvc_video_init(stream);
1714 if (ret < 0) {
1715 uvc_printk(KERN_ERR, "Failed to initialize the device "
1716 "(%d).\n", ret);
1717 return ret;
1718 }
1719
1720 uvc_debugfs_init_stream(stream);
1721
1722 /* Register the device with V4L. */
1723 vdev = video_device_alloc();
1724 if (vdev == NULL) {
1725 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n",
1726 ret);
1727 return -ENOMEM;
1728 }
1729
1730 /* We already hold a reference to dev->udev. The video device will be
1731 * unregistered before the reference is released, so we don't need to
1732 * get another one.
1733 */
1734 vdev->v4l2_dev = &dev->vdev;
1735 vdev->fops = &uvc_fops;
1736 vdev->release = uvc_release;
1737 strlcpy(vdev->name, dev->name, sizeof vdev->name);
1738
1739 /* Set the driver data before calling video_register_device, otherwise
1740 * uvc_v4l2_open might race us.
1741 */
1742 stream->vdev = vdev;
1743 video_set_drvdata(vdev, stream);
1744
1745 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1746 if (ret < 0) {
1747 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
1748 ret);
1749 stream->vdev = NULL;
1750 video_device_release(vdev);
1751 return ret;
1752 }
1753
1754 atomic_inc(&dev->nstreams);
1755 return 0;
1756}
1757
1758/*
1759 * Register all video devices in all chains.
1760 */
1761static int uvc_register_terms(struct uvc_device *dev,
1762 struct uvc_video_chain *chain)
1763{
1764 struct uvc_streaming *stream;
1765 struct uvc_entity *term;
1766 int ret;
1767
1768 list_for_each_entry(term, &chain->entities, chain) {
1769 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1770 continue;
1771
1772 stream = uvc_stream_by_id(dev, term->id);
1773 if (stream == NULL) {
1774 uvc_printk(KERN_INFO, "No streaming interface found "
1775 "for terminal %u.", term->id);
1776 continue;
1777 }
1778
1779 stream->chain = chain;
1780 ret = uvc_register_video(dev, stream);
1781 if (ret < 0)
1782 return ret;
1783
1784 term->vdev = stream->vdev;
1785 }
1786
1787 return 0;
1788}
1789
1790static int uvc_register_chains(struct uvc_device *dev)
1791{
1792 struct uvc_video_chain *chain;
1793 int ret;
1794
1795 list_for_each_entry(chain, &dev->chains, list) {
1796 ret = uvc_register_terms(dev, chain);
1797 if (ret < 0)
1798 return ret;
1799
1800#ifdef CONFIG_MEDIA_CONTROLLER
1801 ret = uvc_mc_register_entities(chain);
1802 if (ret < 0) {
1803 uvc_printk(KERN_INFO, "Failed to register entites "
1804 "(%d).\n", ret);
1805 }
1806#endif
1807 }
1808
1809 return 0;
1810}
1811
1812/* ------------------------------------------------------------------------
1813 * USB probe, disconnect, suspend and resume
1814 */
1815
1816static int uvc_probe(struct usb_interface *intf,
1817 const struct usb_device_id *id)
1818{
1819 struct usb_device *udev = interface_to_usbdev(intf);
1820 struct uvc_device *dev;
1821 int ret;
1822
1823 if (id->idVendor && id->idProduct)
1824 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1825 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1826 id->idProduct);
1827 else
1828 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1829 udev->devpath);
1830
1831 /* Allocate memory for the device and initialize it. */
1832 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1833 return -ENOMEM;
1834
1835 INIT_LIST_HEAD(&dev->entities);
1836 INIT_LIST_HEAD(&dev->chains);
1837 INIT_LIST_HEAD(&dev->streams);
1838 atomic_set(&dev->nstreams, 0);
1839 atomic_set(&dev->users, 0);
1840 atomic_set(&dev->nmappings, 0);
1841
1842 dev->udev = usb_get_dev(udev);
1843 dev->intf = usb_get_intf(intf);
1844 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1845 dev->quirks = (uvc_quirks_param == -1)
1846 ? id->driver_info : uvc_quirks_param;
1847
1848 if (udev->product != NULL)
1849 strlcpy(dev->name, udev->product, sizeof dev->name);
1850 else
1851 snprintf(dev->name, sizeof dev->name,
1852 "UVC Camera (%04x:%04x)",
1853 le16_to_cpu(udev->descriptor.idVendor),
1854 le16_to_cpu(udev->descriptor.idProduct));
1855
1856 /* Parse the Video Class control descriptor. */
1857 if (uvc_parse_control(dev) < 0) {
1858 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1859 "descriptors.\n");
1860 goto error;
1861 }
1862
1863 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1864 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1865 udev->product ? udev->product : "<unnamed>",
1866 le16_to_cpu(udev->descriptor.idVendor),
1867 le16_to_cpu(udev->descriptor.idProduct));
1868
1869 if (dev->quirks != id->driver_info) {
1870 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
1871 "parameter for testing purpose.\n", dev->quirks);
1872 uvc_printk(KERN_INFO, "Please report required quirks to the "
1873 "linux-uvc-devel mailing list.\n");
1874 }
1875
1876 /* Register the media and V4L2 devices. */
1877#ifdef CONFIG_MEDIA_CONTROLLER
1878 dev->mdev.dev = &intf->dev;
1879 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
1880 if (udev->serial)
1881 strlcpy(dev->mdev.serial, udev->serial,
1882 sizeof(dev->mdev.serial));
1883 strcpy(dev->mdev.bus_info, udev->devpath);
1884 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
1885 dev->mdev.driver_version = LINUX_VERSION_CODE;
1886 if (media_device_register(&dev->mdev) < 0)
1887 goto error;
1888
1889 dev->vdev.mdev = &dev->mdev;
1890#endif
1891 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
1892 goto error;
1893
1894 /* Initialize controls. */
1895 if (uvc_ctrl_init_device(dev) < 0)
1896 goto error;
1897
1898 /* Scan the device for video chains. */
1899 if (uvc_scan_device(dev) < 0)
1900 goto error;
1901
1902 /* Register video device nodes. */
1903 if (uvc_register_chains(dev) < 0)
1904 goto error;
1905
1906 /* Save our data pointer in the interface data. */
1907 usb_set_intfdata(intf, dev);
1908
1909 /* Initialize the interrupt URB. */
1910 if ((ret = uvc_status_init(dev)) < 0) {
1911 uvc_printk(KERN_INFO, "Unable to initialize the status "
1912 "endpoint (%d), status interrupt will not be "
1913 "supported.\n", ret);
1914 }
1915
1916 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1917 usb_enable_autosuspend(udev);
1918 return 0;
1919
1920error:
1921 uvc_unregister_video(dev);
1922 return -ENODEV;
1923}
1924
1925static void uvc_disconnect(struct usb_interface *intf)
1926{
1927 struct uvc_device *dev = usb_get_intfdata(intf);
1928
1929 /* Set the USB interface data to NULL. This can be done outside the
1930 * lock, as there's no other reader.
1931 */
1932 usb_set_intfdata(intf, NULL);
1933
1934 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1935 UVC_SC_VIDEOSTREAMING)
1936 return;
1937
1938 dev->state |= UVC_DEV_DISCONNECTED;
1939
1940 uvc_unregister_video(dev);
1941}
1942
1943static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1944{
1945 struct uvc_device *dev = usb_get_intfdata(intf);
1946 struct uvc_streaming *stream;
1947
1948 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1949 intf->cur_altsetting->desc.bInterfaceNumber);
1950
1951 /* Controls are cached on the fly so they don't need to be saved. */
1952 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1953 UVC_SC_VIDEOCONTROL)
1954 return uvc_status_suspend(dev);
1955
1956 list_for_each_entry(stream, &dev->streams, list) {
1957 if (stream->intf == intf)
1958 return uvc_video_suspend(stream);
1959 }
1960
1961 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
1962 "mismatch.\n");
1963 return -EINVAL;
1964}
1965
1966static int __uvc_resume(struct usb_interface *intf, int reset)
1967{
1968 struct uvc_device *dev = usb_get_intfdata(intf);
1969 struct uvc_streaming *stream;
1970
1971 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
1972 intf->cur_altsetting->desc.bInterfaceNumber);
1973
1974 if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1975 UVC_SC_VIDEOCONTROL) {
1976 if (reset) {
1977 int ret = uvc_ctrl_resume_device(dev);
1978
1979 if (ret < 0)
1980 return ret;
1981 }
1982
1983 return uvc_status_resume(dev);
1984 }
1985
1986 list_for_each_entry(stream, &dev->streams, list) {
1987 if (stream->intf == intf)
1988 return uvc_video_resume(stream, reset);
1989 }
1990
1991 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
1992 "mismatch.\n");
1993 return -EINVAL;
1994}
1995
1996static int uvc_resume(struct usb_interface *intf)
1997{
1998 return __uvc_resume(intf, 0);
1999}
2000
2001static int uvc_reset_resume(struct usb_interface *intf)
2002{
2003 return __uvc_resume(intf, 1);
2004}
2005
2006/* ------------------------------------------------------------------------
2007 * Module parameters
2008 */
2009
2010static int uvc_clock_param_get(char *buffer, struct kernel_param *kp)
2011{
2012 if (uvc_clock_param == CLOCK_MONOTONIC)
2013 return sprintf(buffer, "CLOCK_MONOTONIC");
2014 else
2015 return sprintf(buffer, "CLOCK_REALTIME");
2016}
2017
2018static int uvc_clock_param_set(const char *val, struct kernel_param *kp)
2019{
2020 if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2021 val += strlen("clock_");
2022
2023 if (strcasecmp(val, "monotonic") == 0)
2024 uvc_clock_param = CLOCK_MONOTONIC;
2025 else if (strcasecmp(val, "realtime") == 0)
2026 uvc_clock_param = CLOCK_REALTIME;
2027 else
2028 return -EINVAL;
2029
2030 return 0;
2031}
2032
2033module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2034 &uvc_clock_param, S_IRUGO|S_IWUSR);
2035MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2036module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2037MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2038module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2039MODULE_PARM_DESC(quirks, "Forced device quirks");
2040module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2041MODULE_PARM_DESC(trace, "Trace level bitmask");
2042module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2043MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2044
2045/* ------------------------------------------------------------------------
2046 * Driver initialization and cleanup
2047 */
2048
2049/*
2050 * The Logitech cameras listed below have their interface class set to
2051 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2052 * though they are compliant.
2053 */
2054static struct usb_device_id uvc_ids[] = {
2055 /* LogiLink Wireless Webcam */
2056 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2057 | USB_DEVICE_ID_MATCH_INT_INFO,
2058 .idVendor = 0x0416,
2059 .idProduct = 0xa91a,
2060 .bInterfaceClass = USB_CLASS_VIDEO,
2061 .bInterfaceSubClass = 1,
2062 .bInterfaceProtocol = 0,
2063 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2064 /* Genius eFace 2025 */
2065 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2066 | USB_DEVICE_ID_MATCH_INT_INFO,
2067 .idVendor = 0x0458,
2068 .idProduct = 0x706e,
2069 .bInterfaceClass = USB_CLASS_VIDEO,
2070 .bInterfaceSubClass = 1,
2071 .bInterfaceProtocol = 0,
2072 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2073 /* Microsoft Lifecam NX-6000 */
2074 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2075 | USB_DEVICE_ID_MATCH_INT_INFO,
2076 .idVendor = 0x045e,
2077 .idProduct = 0x00f8,
2078 .bInterfaceClass = USB_CLASS_VIDEO,
2079 .bInterfaceSubClass = 1,
2080 .bInterfaceProtocol = 0,
2081 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2082 /* Microsoft Lifecam VX-7000 */
2083 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2084 | USB_DEVICE_ID_MATCH_INT_INFO,
2085 .idVendor = 0x045e,
2086 .idProduct = 0x0723,
2087 .bInterfaceClass = USB_CLASS_VIDEO,
2088 .bInterfaceSubClass = 1,
2089 .bInterfaceProtocol = 0,
2090 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2091 /* Logitech Quickcam Fusion */
2092 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2093 | USB_DEVICE_ID_MATCH_INT_INFO,
2094 .idVendor = 0x046d,
2095 .idProduct = 0x08c1,
2096 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2097 .bInterfaceSubClass = 1,
2098 .bInterfaceProtocol = 0 },
2099 /* Logitech Quickcam Orbit MP */
2100 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2101 | USB_DEVICE_ID_MATCH_INT_INFO,
2102 .idVendor = 0x046d,
2103 .idProduct = 0x08c2,
2104 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2105 .bInterfaceSubClass = 1,
2106 .bInterfaceProtocol = 0 },
2107 /* Logitech Quickcam Pro for Notebook */
2108 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2109 | USB_DEVICE_ID_MATCH_INT_INFO,
2110 .idVendor = 0x046d,
2111 .idProduct = 0x08c3,
2112 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2113 .bInterfaceSubClass = 1,
2114 .bInterfaceProtocol = 0 },
2115 /* Logitech Quickcam Pro 5000 */
2116 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2117 | USB_DEVICE_ID_MATCH_INT_INFO,
2118 .idVendor = 0x046d,
2119 .idProduct = 0x08c5,
2120 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2121 .bInterfaceSubClass = 1,
2122 .bInterfaceProtocol = 0 },
2123 /* Logitech Quickcam OEM Dell Notebook */
2124 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2125 | USB_DEVICE_ID_MATCH_INT_INFO,
2126 .idVendor = 0x046d,
2127 .idProduct = 0x08c6,
2128 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2129 .bInterfaceSubClass = 1,
2130 .bInterfaceProtocol = 0 },
2131 /* Logitech Quickcam OEM Cisco VT Camera II */
2132 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2133 | USB_DEVICE_ID_MATCH_INT_INFO,
2134 .idVendor = 0x046d,
2135 .idProduct = 0x08c7,
2136 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2137 .bInterfaceSubClass = 1,
2138 .bInterfaceProtocol = 0 },
2139 /* Chicony CNF7129 (Asus EEE 100HE) */
2140 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2141 | USB_DEVICE_ID_MATCH_INT_INFO,
2142 .idVendor = 0x04f2,
2143 .idProduct = 0xb071,
2144 .bInterfaceClass = USB_CLASS_VIDEO,
2145 .bInterfaceSubClass = 1,
2146 .bInterfaceProtocol = 0,
2147 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE },
2148 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2149 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2150 | USB_DEVICE_ID_MATCH_INT_INFO,
2151 .idVendor = 0x058f,
2152 .idProduct = 0x3820,
2153 .bInterfaceClass = USB_CLASS_VIDEO,
2154 .bInterfaceSubClass = 1,
2155 .bInterfaceProtocol = 0,
2156 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2157 /* Dell XPS m1530 */
2158 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2159 | USB_DEVICE_ID_MATCH_INT_INFO,
2160 .idVendor = 0x05a9,
2161 .idProduct = 0x2640,
2162 .bInterfaceClass = USB_CLASS_VIDEO,
2163 .bInterfaceSubClass = 1,
2164 .bInterfaceProtocol = 0,
2165 .driver_info = UVC_QUIRK_PROBE_DEF },
2166 /* Apple Built-In iSight */
2167 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2168 | USB_DEVICE_ID_MATCH_INT_INFO,
2169 .idVendor = 0x05ac,
2170 .idProduct = 0x8501,
2171 .bInterfaceClass = USB_CLASS_VIDEO,
2172 .bInterfaceSubClass = 1,
2173 .bInterfaceProtocol = 0,
2174 .driver_info = UVC_QUIRK_PROBE_MINMAX
2175 | UVC_QUIRK_BUILTIN_ISIGHT },
2176 /* Foxlink ("HP Webcam" on HP Mini 5103) */
2177 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2178 | USB_DEVICE_ID_MATCH_INT_INFO,
2179 .idVendor = 0x05c8,
2180 .idProduct = 0x0403,
2181 .bInterfaceClass = USB_CLASS_VIDEO,
2182 .bInterfaceSubClass = 1,
2183 .bInterfaceProtocol = 0,
2184 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2185 /* Genesys Logic USB 2.0 PC Camera */
2186 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2187 | USB_DEVICE_ID_MATCH_INT_INFO,
2188 .idVendor = 0x05e3,
2189 .idProduct = 0x0505,
2190 .bInterfaceClass = USB_CLASS_VIDEO,
2191 .bInterfaceSubClass = 1,
2192 .bInterfaceProtocol = 0,
2193 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2194 /* Hercules Classic Silver */
2195 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2196 | USB_DEVICE_ID_MATCH_INT_INFO,
2197 .idVendor = 0x06f8,
2198 .idProduct = 0x300c,
2199 .bInterfaceClass = USB_CLASS_VIDEO,
2200 .bInterfaceSubClass = 1,
2201 .bInterfaceProtocol = 0,
2202 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2203 /* ViMicro Vega */
2204 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2205 | USB_DEVICE_ID_MATCH_INT_INFO,
2206 .idVendor = 0x0ac8,
2207 .idProduct = 0x332d,
2208 .bInterfaceClass = USB_CLASS_VIDEO,
2209 .bInterfaceSubClass = 1,
2210 .bInterfaceProtocol = 0,
2211 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2212 /* ViMicro - Minoru3D */
2213 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2214 | USB_DEVICE_ID_MATCH_INT_INFO,
2215 .idVendor = 0x0ac8,
2216 .idProduct = 0x3410,
2217 .bInterfaceClass = USB_CLASS_VIDEO,
2218 .bInterfaceSubClass = 1,
2219 .bInterfaceProtocol = 0,
2220 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2221 /* ViMicro Venus - Minoru3D */
2222 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2223 | USB_DEVICE_ID_MATCH_INT_INFO,
2224 .idVendor = 0x0ac8,
2225 .idProduct = 0x3420,
2226 .bInterfaceClass = USB_CLASS_VIDEO,
2227 .bInterfaceSubClass = 1,
2228 .bInterfaceProtocol = 0,
2229 .driver_info = UVC_QUIRK_FIX_BANDWIDTH },
2230 /* Ophir Optronics - SPCAM 620U */
2231 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2232 | USB_DEVICE_ID_MATCH_INT_INFO,
2233 .idVendor = 0x0bd3,
2234 .idProduct = 0x0555,
2235 .bInterfaceClass = USB_CLASS_VIDEO,
2236 .bInterfaceSubClass = 1,
2237 .bInterfaceProtocol = 0,
2238 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2239 /* MT6227 */
2240 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2241 | USB_DEVICE_ID_MATCH_INT_INFO,
2242 .idVendor = 0x0e8d,
2243 .idProduct = 0x0004,
2244 .bInterfaceClass = USB_CLASS_VIDEO,
2245 .bInterfaceSubClass = 1,
2246 .bInterfaceProtocol = 0,
2247 .driver_info = UVC_QUIRK_PROBE_MINMAX
2248 | UVC_QUIRK_PROBE_DEF },
2249 /* IMC Networks (Medion Akoya) */
2250 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2251 | USB_DEVICE_ID_MATCH_INT_INFO,
2252 .idVendor = 0x13d3,
2253 .idProduct = 0x5103,
2254 .bInterfaceClass = USB_CLASS_VIDEO,
2255 .bInterfaceSubClass = 1,
2256 .bInterfaceProtocol = 0,
2257 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2258 /* JMicron USB2.0 XGA WebCam */
2259 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2260 | USB_DEVICE_ID_MATCH_INT_INFO,
2261 .idVendor = 0x152d,
2262 .idProduct = 0x0310,
2263 .bInterfaceClass = USB_CLASS_VIDEO,
2264 .bInterfaceSubClass = 1,
2265 .bInterfaceProtocol = 0,
2266 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2267 /* Syntek (HP Spartan) */
2268 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2269 | USB_DEVICE_ID_MATCH_INT_INFO,
2270 .idVendor = 0x174f,
2271 .idProduct = 0x5212,
2272 .bInterfaceClass = USB_CLASS_VIDEO,
2273 .bInterfaceSubClass = 1,
2274 .bInterfaceProtocol = 0,
2275 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2276 /* Syntek (Samsung Q310) */
2277 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2278 | USB_DEVICE_ID_MATCH_INT_INFO,
2279 .idVendor = 0x174f,
2280 .idProduct = 0x5931,
2281 .bInterfaceClass = USB_CLASS_VIDEO,
2282 .bInterfaceSubClass = 1,
2283 .bInterfaceProtocol = 0,
2284 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2285 /* Syntek (Packard Bell EasyNote MX52 */
2286 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2287 | USB_DEVICE_ID_MATCH_INT_INFO,
2288 .idVendor = 0x174f,
2289 .idProduct = 0x8a12,
2290 .bInterfaceClass = USB_CLASS_VIDEO,
2291 .bInterfaceSubClass = 1,
2292 .bInterfaceProtocol = 0,
2293 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2294 /* Syntek (Asus F9SG) */
2295 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2296 | USB_DEVICE_ID_MATCH_INT_INFO,
2297 .idVendor = 0x174f,
2298 .idProduct = 0x8a31,
2299 .bInterfaceClass = USB_CLASS_VIDEO,
2300 .bInterfaceSubClass = 1,
2301 .bInterfaceProtocol = 0,
2302 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2303 /* Syntek (Asus U3S) */
2304 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2305 | USB_DEVICE_ID_MATCH_INT_INFO,
2306 .idVendor = 0x174f,
2307 .idProduct = 0x8a33,
2308 .bInterfaceClass = USB_CLASS_VIDEO,
2309 .bInterfaceSubClass = 1,
2310 .bInterfaceProtocol = 0,
2311 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2312 /* Syntek (JAOtech Smart Terminal) */
2313 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2314 | USB_DEVICE_ID_MATCH_INT_INFO,
2315 .idVendor = 0x174f,
2316 .idProduct = 0x8a34,
2317 .bInterfaceClass = USB_CLASS_VIDEO,
2318 .bInterfaceSubClass = 1,
2319 .bInterfaceProtocol = 0,
2320 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2321 /* Miricle 307K */
2322 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2323 | USB_DEVICE_ID_MATCH_INT_INFO,
2324 .idVendor = 0x17dc,
2325 .idProduct = 0x0202,
2326 .bInterfaceClass = USB_CLASS_VIDEO,
2327 .bInterfaceSubClass = 1,
2328 .bInterfaceProtocol = 0,
2329 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2330 /* Lenovo Thinkpad SL400/SL500 */
2331 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2332 | USB_DEVICE_ID_MATCH_INT_INFO,
2333 .idVendor = 0x17ef,
2334 .idProduct = 0x480b,
2335 .bInterfaceClass = USB_CLASS_VIDEO,
2336 .bInterfaceSubClass = 1,
2337 .bInterfaceProtocol = 0,
2338 .driver_info = UVC_QUIRK_STREAM_NO_FID },
2339 /* Aveo Technology USB 2.0 Camera */
2340 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2341 | USB_DEVICE_ID_MATCH_INT_INFO,
2342 .idVendor = 0x1871,
2343 .idProduct = 0x0306,
2344 .bInterfaceClass = USB_CLASS_VIDEO,
2345 .bInterfaceSubClass = 1,
2346 .bInterfaceProtocol = 0,
2347 .driver_info = UVC_QUIRK_PROBE_MINMAX
2348 | UVC_QUIRK_PROBE_EXTRAFIELDS },
2349 /* Ecamm Pico iMage */
2350 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2351 | USB_DEVICE_ID_MATCH_INT_INFO,
2352 .idVendor = 0x18cd,
2353 .idProduct = 0xcafe,
2354 .bInterfaceClass = USB_CLASS_VIDEO,
2355 .bInterfaceSubClass = 1,
2356 .bInterfaceProtocol = 0,
2357 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS },
2358 /* Manta MM-353 Plako */
2359 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2360 | USB_DEVICE_ID_MATCH_INT_INFO,
2361 .idVendor = 0x18ec,
2362 .idProduct = 0x3188,
2363 .bInterfaceClass = USB_CLASS_VIDEO,
2364 .bInterfaceSubClass = 1,
2365 .bInterfaceProtocol = 0,
2366 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2367 /* FSC WebCam V30S */
2368 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2369 | USB_DEVICE_ID_MATCH_INT_INFO,
2370 .idVendor = 0x18ec,
2371 .idProduct = 0x3288,
2372 .bInterfaceClass = USB_CLASS_VIDEO,
2373 .bInterfaceSubClass = 1,
2374 .bInterfaceProtocol = 0,
2375 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2376 /* Arkmicro unbranded */
2377 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2378 | USB_DEVICE_ID_MATCH_INT_INFO,
2379 .idVendor = 0x18ec,
2380 .idProduct = 0x3290,
2381 .bInterfaceClass = USB_CLASS_VIDEO,
2382 .bInterfaceSubClass = 1,
2383 .bInterfaceProtocol = 0,
2384 .driver_info = UVC_QUIRK_PROBE_DEF },
2385 /* The Imaging Source USB CCD cameras */
2386 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2387 | USB_DEVICE_ID_MATCH_INT_INFO,
2388 .idVendor = 0x199e,
2389 .idProduct = 0x8102,
2390 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
2391 .bInterfaceSubClass = 1,
2392 .bInterfaceProtocol = 0 },
2393 /* Bodelin ProScopeHR */
2394 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2395 | USB_DEVICE_ID_MATCH_DEV_HI
2396 | USB_DEVICE_ID_MATCH_INT_INFO,
2397 .idVendor = 0x19ab,
2398 .idProduct = 0x1000,
2399 .bcdDevice_hi = 0x0126,
2400 .bInterfaceClass = USB_CLASS_VIDEO,
2401 .bInterfaceSubClass = 1,
2402 .bInterfaceProtocol = 0,
2403 .driver_info = UVC_QUIRK_STATUS_INTERVAL },
2404 /* MSI StarCam 370i */
2405 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2406 | USB_DEVICE_ID_MATCH_INT_INFO,
2407 .idVendor = 0x1b3b,
2408 .idProduct = 0x2951,
2409 .bInterfaceClass = USB_CLASS_VIDEO,
2410 .bInterfaceSubClass = 1,
2411 .bInterfaceProtocol = 0,
2412 .driver_info = UVC_QUIRK_PROBE_MINMAX },
2413 /* SiGma Micro USB Web Camera */
2414 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
2415 | USB_DEVICE_ID_MATCH_INT_INFO,
2416 .idVendor = 0x1c4f,
2417 .idProduct = 0x3000,
2418 .bInterfaceClass = USB_CLASS_VIDEO,
2419 .bInterfaceSubClass = 1,
2420 .bInterfaceProtocol = 0,
2421 .driver_info = UVC_QUIRK_PROBE_MINMAX
2422 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
2423 /* Generic USB Video Class */
2424 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
2425 {}
2426};
2427
2428MODULE_DEVICE_TABLE(usb, uvc_ids);
2429
2430struct uvc_driver uvc_driver = {
2431 .driver = {
2432 .name = "uvcvideo",
2433 .probe = uvc_probe,
2434 .disconnect = uvc_disconnect,
2435 .suspend = uvc_suspend,
2436 .resume = uvc_resume,
2437 .reset_resume = uvc_reset_resume,
2438 .id_table = uvc_ids,
2439 .supports_autosuspend = 1,
2440 },
2441};
2442
2443static int __init uvc_init(void)
2444{
2445 int ret;
2446
2447 uvc_debugfs_init();
2448
2449 ret = usb_register(&uvc_driver.driver);
2450 if (ret < 0) {
2451 uvc_debugfs_cleanup();
2452 return ret;
2453 }
2454
2455 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2456 return 0;
2457}
2458
2459static void __exit uvc_cleanup(void)
2460{
2461 usb_deregister(&uvc_driver.driver);
2462 uvc_debugfs_cleanup();
2463}
2464
2465module_init(uvc_init);
2466module_exit(uvc_cleanup);
2467
2468MODULE_AUTHOR(DRIVER_AUTHOR);
2469MODULE_DESCRIPTION(DRIVER_DESC);
2470MODULE_LICENSE("GPL");
2471MODULE_VERSION(DRIVER_VERSION);
2472
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-08 01:31:42 -0500