2 * uvc_driver.c -- USB Video Class driver
4 * Copyright (C) 2005-2010
5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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.
15 * This driver aims to support video input and ouput devices compliant with the
16 * 'USB Video Class' specification.
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.
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>
38 #include <media/v4l2-common.h>
42 #define DRIVER_AUTHOR "Laurent Pinchart " \
43 "<laurent.pinchart@ideasonboard.com>"
44 #define DRIVER_DESC "USB Video Class driver"
46 unsigned int uvc_clock_param
= CLOCK_MONOTONIC
;
47 unsigned int uvc_no_drop_param
;
48 static unsigned int uvc_quirks_param
= -1;
49 unsigned int uvc_trace_param
;
50 unsigned int uvc_timeout_param
= UVC_CTRL_STREAMING_TIMEOUT
;
52 /* ------------------------------------------------------------------------
56 static struct uvc_format_desc uvc_fmts
[] = {
58 .name
= "YUV 4:2:2 (YUYV)",
59 .guid
= UVC_GUID_FORMAT_YUY2
,
60 .fcc
= V4L2_PIX_FMT_YUYV
,
63 .name
= "YUV 4:2:2 (YUYV)",
64 .guid
= UVC_GUID_FORMAT_YUY2_ISIGHT
,
65 .fcc
= V4L2_PIX_FMT_YUYV
,
68 .name
= "YUV 4:2:0 (NV12)",
69 .guid
= UVC_GUID_FORMAT_NV12
,
70 .fcc
= V4L2_PIX_FMT_NV12
,
74 .guid
= UVC_GUID_FORMAT_MJPEG
,
75 .fcc
= V4L2_PIX_FMT_MJPEG
,
78 .name
= "YVU 4:2:0 (YV12)",
79 .guid
= UVC_GUID_FORMAT_YV12
,
80 .fcc
= V4L2_PIX_FMT_YVU420
,
83 .name
= "YUV 4:2:0 (I420)",
84 .guid
= UVC_GUID_FORMAT_I420
,
85 .fcc
= V4L2_PIX_FMT_YUV420
,
88 .name
= "YUV 4:2:0 (M420)",
89 .guid
= UVC_GUID_FORMAT_M420
,
90 .fcc
= V4L2_PIX_FMT_M420
,
93 .name
= "YUV 4:2:2 (UYVY)",
94 .guid
= UVC_GUID_FORMAT_UYVY
,
95 .fcc
= V4L2_PIX_FMT_UYVY
,
98 .name
= "Greyscale 8-bit (Y800)",
99 .guid
= UVC_GUID_FORMAT_Y800
,
100 .fcc
= V4L2_PIX_FMT_GREY
,
103 .name
= "Greyscale 8-bit (Y8 )",
104 .guid
= UVC_GUID_FORMAT_Y8
,
105 .fcc
= V4L2_PIX_FMT_GREY
,
108 .name
= "Greyscale 10-bit (Y10 )",
109 .guid
= UVC_GUID_FORMAT_Y10
,
110 .fcc
= V4L2_PIX_FMT_Y10
,
113 .name
= "Greyscale 12-bit (Y12 )",
114 .guid
= UVC_GUID_FORMAT_Y12
,
115 .fcc
= V4L2_PIX_FMT_Y12
,
118 .name
= "Greyscale 16-bit (Y16 )",
119 .guid
= UVC_GUID_FORMAT_Y16
,
120 .fcc
= V4L2_PIX_FMT_Y16
,
124 .guid
= UVC_GUID_FORMAT_BY8
,
125 .fcc
= V4L2_PIX_FMT_SBGGR8
,
129 .guid
= UVC_GUID_FORMAT_RGBP
,
130 .fcc
= V4L2_PIX_FMT_RGB565
,
134 .guid
= UVC_GUID_FORMAT_H264
,
135 .fcc
= V4L2_PIX_FMT_H264
,
139 /* ------------------------------------------------------------------------
143 struct usb_host_endpoint
*uvc_find_endpoint(struct usb_host_interface
*alts
,
146 struct usb_host_endpoint
*ep
;
149 for (i
= 0; i
< alts
->desc
.bNumEndpoints
; ++i
) {
150 ep
= &alts
->endpoint
[i
];
151 if (ep
->desc
.bEndpointAddress
== epaddr
)
158 static struct uvc_format_desc
*uvc_format_by_guid(const __u8 guid
[16])
160 unsigned int len
= ARRAY_SIZE(uvc_fmts
);
163 for (i
= 0; i
< len
; ++i
) {
164 if (memcmp(guid
, uvc_fmts
[i
].guid
, 16) == 0)
171 static __u32
uvc_colorspace(const __u8 primaries
)
173 static const __u8 colorprimaries
[] = {
175 V4L2_COLORSPACE_SRGB
,
176 V4L2_COLORSPACE_470_SYSTEM_M
,
177 V4L2_COLORSPACE_470_SYSTEM_BG
,
178 V4L2_COLORSPACE_SMPTE170M
,
179 V4L2_COLORSPACE_SMPTE240M
,
182 if (primaries
< ARRAY_SIZE(colorprimaries
))
183 return colorprimaries
[primaries
];
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.
195 void uvc_simplify_fraction(uint32_t *numerator
, uint32_t *denominator
,
196 unsigned int n_terms
, unsigned int threshold
)
202 an
= kmalloc(n_terms
* sizeof *an
, GFP_KERNEL
);
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
214 for (n
= 0; n
< n_terms
&& y
!= 0; ++n
) {
216 if (an
[n
] >= threshold
) {
227 /* Expand the simple continued fraction back to an integer fraction. */
231 for (i
= n
; i
> 0; --i
) {
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
246 uint32_t uvc_fraction_to_interval(uint32_t numerator
, uint32_t denominator
)
250 /* Saturate the result if the operation would overflow. */
251 if (denominator
== 0 ||
252 numerator
/denominator
>= ((uint32_t)-1)/10000000)
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.
259 multiplier
= 10000000;
260 while (numerator
> ((uint32_t)-1)/multiplier
) {
265 return denominator
? numerator
* multiplier
/ denominator
: 0;
268 /* ------------------------------------------------------------------------
269 * Terminal and unit management
272 struct uvc_entity
*uvc_entity_by_id(struct uvc_device
*dev
, int id
)
274 struct uvc_entity
*entity
;
276 list_for_each_entry(entity
, &dev
->entities
, list
) {
277 if (entity
->id
== id
)
284 static struct uvc_entity
*uvc_entity_by_reference(struct uvc_device
*dev
,
285 int id
, struct uvc_entity
*entity
)
290 entity
= list_entry(&dev
->entities
, struct uvc_entity
, list
);
292 list_for_each_entry_continue(entity
, &dev
->entities
, list
) {
293 for (i
= 0; i
< entity
->bNrInPins
; ++i
)
294 if (entity
->baSourceID
[i
] == id
)
301 static struct uvc_streaming
*uvc_stream_by_id(struct uvc_device
*dev
, int id
)
303 struct uvc_streaming
*stream
;
305 list_for_each_entry(stream
, &dev
->streams
, list
) {
306 if (stream
->header
.bTerminalLink
== id
)
313 /* ------------------------------------------------------------------------
314 * Descriptors parsing
317 static 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
)
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
;
330 format
->type
= buffer
[2];
331 format
->index
= buffer
[3];
334 case UVC_VS_FORMAT_UNCOMPRESSED
:
335 case UVC_VS_FORMAT_FRAME_BASED
:
336 n
= buffer
[2] == UVC_VS_FORMAT_UNCOMPRESSED
? 27 : 28;
338 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
339 "interface %d FORMAT error\n",
341 alts
->desc
.bInterfaceNumber
);
345 /* Find the format descriptor from its GUID. */
346 fmtdesc
= uvc_format_by_guid(&buffer
[5]);
348 if (fmtdesc
!= NULL
) {
349 strlcpy(format
->name
, fmtdesc
->name
,
350 sizeof format
->name
);
351 format
->fcc
= fmtdesc
->fcc
;
353 uvc_printk(KERN_INFO
, "Unknown video format %pUl\n",
355 snprintf(format
->name
, sizeof(format
->name
), "%pUl\n",
360 format
->bpp
= buffer
[21];
361 if (buffer
[2] == UVC_VS_FORMAT_UNCOMPRESSED
) {
362 ftype
= UVC_VS_FRAME_UNCOMPRESSED
;
364 ftype
= UVC_VS_FRAME_FRAME_BASED
;
366 format
->flags
= UVC_FMT_FLAG_COMPRESSED
;
370 case UVC_VS_FORMAT_MJPEG
:
372 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
373 "interface %d FORMAT error\n",
375 alts
->desc
.bInterfaceNumber
);
379 strlcpy(format
->name
, "MJPEG", sizeof format
->name
);
380 format
->fcc
= V4L2_PIX_FMT_MJPEG
;
381 format
->flags
= UVC_FMT_FLAG_COMPRESSED
;
383 ftype
= UVC_VS_FRAME_MJPEG
;
386 case UVC_VS_FORMAT_DV
:
388 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
389 "interface %d FORMAT error\n",
391 alts
->desc
.bInterfaceNumber
);
395 switch (buffer
[8] & 0x7f) {
397 strlcpy(format
->name
, "SD-DV", sizeof format
->name
);
400 strlcpy(format
->name
, "SDL-DV", sizeof format
->name
);
403 strlcpy(format
->name
, "HD-DV", sizeof format
->name
);
406 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
407 "interface %d: unknown DV format %u\n",
409 alts
->desc
.bInterfaceNumber
, buffer
[8]);
413 strlcat(format
->name
, buffer
[8] & (1 << 7) ? " 60Hz" : " 50Hz",
414 sizeof format
->name
);
416 format
->fcc
= V4L2_PIX_FMT_DV
;
417 format
->flags
= UVC_FMT_FLAG_COMPRESSED
| UVC_FMT_FLAG_STREAM
;
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
;
431 case UVC_VS_FORMAT_MPEG2TS
:
432 case UVC_VS_FORMAT_STREAM_BASED
:
433 /* Not supported yet. */
435 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
436 "interface %d unsupported format %u\n",
437 dev
->udev
->devnum
, alts
->desc
.bInterfaceNumber
,
442 uvc_trace(UVC_TRACE_DESCR
, "Found format %s.\n", format
->name
);
447 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
448 * based formats have frame descriptors.
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;
456 n
= buflen
> 21 ? buffer
[21] : 0;
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
);
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];
480 frame
->dwMaxVideoFrameBufferSize
= 0;
481 frame
->dwDefaultFrameInterval
=
482 get_unaligned_le32(&buffer
[17]);
483 frame
->bFrameIntervalType
= buffer
[21];
485 frame
->dwFrameInterval
= *intervals
;
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.
495 if (!(format
->flags
& UVC_FMT_FLAG_COMPRESSED
))
496 frame
->dwMaxVideoFrameBufferSize
= format
->bpp
497 * frame
->wWidth
* frame
->wHeight
/ 8;
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.
504 for (i
= 0; i
< n
; ++i
) {
505 interval
= get_unaligned_le32(&buffer
[26+4*i
]);
506 *(*intervals
)++ = interval
? interval
: 1;
509 /* Make sure that the default frame interval stays between
512 n
-= frame
->bFrameIntervalType
? 1 : 2;
513 frame
->dwDefaultFrameInterval
=
514 min(frame
->dwFrameInterval
[n
],
515 max(frame
->dwFrameInterval
[0],
516 frame
->dwDefaultFrameInterval
));
518 if (dev
->quirks
& UVC_QUIRK_RESTRICT_FRAME_RATE
) {
519 frame
->bFrameIntervalType
= 1;
520 frame
->dwFrameInterval
[0] =
521 frame
->dwDefaultFrameInterval
;
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);
534 if (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
&&
535 buffer
[2] == UVC_VS_STILL_IMAGE_FRAME
) {
540 if (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
&&
541 buffer
[2] == UVC_VS_COLORFORMAT
) {
543 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
544 "interface %d COLORFORMAT error\n",
546 alts
->desc
.bInterfaceNumber
);
550 format
->colorspace
= uvc_colorspace(buffer
[3]);
556 return buffer
- start
;
559 static int uvc_parse_streaming(struct uvc_device
*dev
,
560 struct usb_interface
*intf
)
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
;
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
);
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
);
589 streaming
= kzalloc(sizeof *streaming
, GFP_KERNEL
);
590 if (streaming
== NULL
) {
591 usb_driver_release_interface(&uvc_driver
.driver
, intf
);
595 mutex_init(&streaming
->mutex
);
596 streaming
->dev
= dev
;
597 streaming
->intf
= usb_get_intf(intf
);
598 streaming
->intfnum
= intf
->cur_altsetting
->desc
.bInterfaceNumber
;
600 /* The Pico iMage webcam has its class-specific interface descriptors
601 * after the endpoint descriptors.
604 for (i
= 0; i
< alts
->desc
.bNumEndpoints
; ++i
) {
605 struct usb_host_endpoint
*ep
= &alts
->endpoint
[i
];
607 if (ep
->extralen
== 0)
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
;
621 /* Skip the standard interface descriptors. */
622 while (buflen
> 2 && buffer
[1] != USB_DT_CS_INTERFACE
) {
628 uvc_trace(UVC_TRACE_DESCR
, "no class-specific streaming "
629 "interface descriptors found.\n");
633 /* Parse the header descriptor. */
635 case UVC_VS_OUTPUT_HEADER
:
636 streaming
->type
= V4L2_BUF_TYPE_VIDEO_OUTPUT
;
640 case UVC_VS_INPUT_HEADER
:
641 streaming
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
646 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming interface "
647 "%d HEADER descriptor not found.\n", dev
->udev
->devnum
,
648 alts
->desc
.bInterfaceNumber
);
652 p
= buflen
>= 4 ? buffer
[3] : 0;
653 n
= buflen
>= size
? buffer
[size
-1] : 0;
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
);
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];
671 streaming
->header
.bTerminalLink
= buffer
[7];
673 streaming
->header
.bControlSize
= n
;
675 streaming
->header
.bmaControls
= kmemdup(&buffer
[size
], p
* n
,
677 if (streaming
->header
.bmaControls
== NULL
) {
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
:
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.
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",
711 alts
->desc
.bInterfaceNumber
, _buffer
[2]);
714 case UVC_VS_FRAME_UNCOMPRESSED
:
715 case UVC_VS_FRAME_MJPEG
:
718 nintervals
+= _buffer
[25] ? _buffer
[25] : 3;
721 case UVC_VS_FRAME_FRAME_BASED
:
724 nintervals
+= _buffer
[21] ? _buffer
[21] : 3;
728 _buflen
-= _buffer
[0];
729 _buffer
+= _buffer
[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
);
739 size
= nformats
* sizeof *format
+ nframes
* sizeof *frame
740 + nintervals
* sizeof *interval
;
741 format
= kzalloc(size
, GFP_KERNEL
);
742 if (format
== NULL
) {
747 frame
= (struct uvc_frame
*)&format
[nformats
];
748 interval
= (__u32
*)&frame
[nframes
];
750 streaming
->format
= format
;
751 streaming
->nformats
= nformats
;
753 /* Parse the format descriptors. */
754 while (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
) {
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
);
766 frame
+= format
->nframes
;
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
);
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
);
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
;
801 list_add_tail(&streaming
->list
, &dev
->streams
);
805 usb_driver_release_interface(&uvc_driver
.driver
, intf
);
807 kfree(streaming
->format
);
808 kfree(streaming
->header
.bmaControls
);
813 static struct uvc_entity
*uvc_alloc_entity(u16 type
, u8 id
,
814 unsigned int num_pads
, unsigned int extra_size
)
816 struct uvc_entity
*entity
;
817 unsigned int num_inputs
;
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
825 entity
= kzalloc(size
, GFP_KERNEL
);
832 entity
->num_links
= 0;
833 entity
->num_pads
= num_pads
;
834 entity
->pads
= ((void *)(entity
+ 1)) + extra_size
;
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
;
841 entity
->bNrInPins
= num_inputs
;
842 entity
->baSourceID
= (__u8
*)(&entity
->pads
[num_pads
]);
847 /* Parse vendor-specific extensions. */
848 static int uvc_parse_vendor_control(struct uvc_device
*dev
,
849 const unsigned char *buffer
, int buflen
)
851 struct usb_device
*udev
= dev
->udev
;
852 struct usb_host_interface
*alts
= dev
->intf
->cur_altsetting
;
853 struct uvc_entity
*unit
;
857 switch (le16_to_cpu(dev
->udev
->descriptor
.idVendor
)) {
858 case 0x046d: /* Logitech */
859 if (buffer
[1] != 0x41 || buffer
[2] != 0x01)
862 /* Logitech implements several vendor specific functions
863 * through vendor specific extension units (LXU).
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
870 * ----------------------------------------------------------
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:
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
886 * ----------------------------------------------------------
888 p
= buflen
>= 22 ? buffer
[21] : 0;
889 n
= buflen
>= 25 + p
? buffer
[22+p
] : 0;
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
);
898 unit
= uvc_alloc_entity(UVC_VC_EXTENSION_UNIT
, buffer
[3],
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
)
910 memcpy(unit
->extension
.bmControls
, &buffer
[23+p
], 2*n
);
912 if (buffer
[24+p
+2*n
] != 0)
913 usb_string(udev
, buffer
[24+p
+2*n
], unit
->name
,
916 sprintf(unit
->name
, "Extension %u", buffer
[3]);
918 list_add_tail(&unit
->list
, &dev
->entities
);
926 static int uvc_parse_standard_control(struct uvc_device
*dev
,
927 const unsigned char *buffer
, int buflen
)
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
;
938 n
= buflen
>= 12 ? buffer
[11] : 0;
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
);
947 dev
->uvc_version
= get_unaligned_le16(&buffer
[3]);
948 dev
->clock_frequency
= get_unaligned_le32(&buffer
[7]);
950 /* Parse all USB Video Streaming interfaces. */
951 for (i
= 0; i
< n
; ++i
) {
952 intf
= usb_ifnum_to_if(udev
, buffer
[12+i
]);
954 uvc_trace(UVC_TRACE_DESCR
, "device %d "
955 "interface %d doesn't exists\n",
960 uvc_parse_streaming(dev
, intf
);
964 case UVC_VC_INPUT_TERMINAL
:
966 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
967 "interface %d INPUT_TERMINAL error\n",
968 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
972 /* Make sure the terminal type MSB is not null, otherwise it
973 * could be confused with a unit.
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
,
989 if (type
== UVC_ITT_CAMERA
) {
990 n
= buflen
>= 15 ? buffer
[14] : 0;
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;
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
);
1006 term
= uvc_alloc_entity(type
| UVC_TERM_INPUT
, buffer
[3],
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
1028 memcpy(term
->media
.bmControls
, &buffer
[9], n
);
1029 memcpy(term
->media
.bmTransportModes
, &buffer
[10+n
], p
);
1033 usb_string(udev
, buffer
[7], 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]);
1040 sprintf(term
->name
, "Input %u", buffer
[3]);
1042 list_add_tail(&term
->list
, &dev
->entities
);
1045 case UVC_VC_OUTPUT_TERMINAL
:
1047 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
1048 "interface %d OUTPUT_TERMINAL error\n",
1049 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
1053 /* Make sure the terminal type MSB is not null, otherwise it
1054 * could be confused with a unit.
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
);
1065 term
= uvc_alloc_entity(type
| UVC_TERM_OUTPUT
, buffer
[3],
1070 memcpy(term
->baSourceID
, &buffer
[7], 1);
1073 usb_string(udev
, buffer
[8], term
->name
,
1076 sprintf(term
->name
, "Output %u", buffer
[3]);
1078 list_add_tail(&term
->list
, &dev
->entities
);
1081 case UVC_VC_SELECTOR_UNIT
:
1082 p
= buflen
>= 5 ? buffer
[4] : 0;
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
);
1091 unit
= uvc_alloc_entity(buffer
[2], buffer
[3], p
+ 1, 0);
1095 memcpy(unit
->baSourceID
, &buffer
[5], p
);
1097 if (buffer
[5+p
] != 0)
1098 usb_string(udev
, buffer
[5+p
], unit
->name
,
1101 sprintf(unit
->name
, "Selector %u", buffer
[3]);
1103 list_add_tail(&unit
->list
, &dev
->entities
);
1106 case UVC_VC_PROCESSING_UNIT
:
1107 n
= buflen
>= 8 ? buffer
[7] : 0;
1108 p
= dev
->uvc_version
>= 0x0110 ? 10 : 9;
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
);
1117 unit
= uvc_alloc_entity(buffer
[2], buffer
[3], 2, n
);
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
];
1130 if (buffer
[8+n
] != 0)
1131 usb_string(udev
, buffer
[8+n
], unit
->name
,
1134 sprintf(unit
->name
, "Processing %u", buffer
[3]);
1136 list_add_tail(&unit
->list
, &dev
->entities
);
1139 case UVC_VC_EXTENSION_UNIT
:
1140 p
= buflen
>= 22 ? buffer
[21] : 0;
1141 n
= buflen
>= 24 + p
? buffer
[22+p
] : 0;
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
);
1150 unit
= uvc_alloc_entity(buffer
[2], buffer
[3], p
+ 1, n
);
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
);
1161 if (buffer
[23+p
+n
] != 0)
1162 usb_string(udev
, buffer
[23+p
+n
], unit
->name
,
1165 sprintf(unit
->name
, "Extension %u", buffer
[3]);
1167 list_add_tail(&unit
->list
, &dev
->entities
);
1171 uvc_trace(UVC_TRACE_DESCR
, "Found an unknown CS_INTERFACE "
1172 "descriptor (%u)\n", buffer
[2]);
1179 static int uvc_parse_control(struct uvc_device
*dev
)
1181 struct usb_host_interface
*alts
= dev
->intf
->cur_altsetting
;
1182 unsigned char *buffer
= alts
->extra
;
1183 int buflen
= alts
->extralen
;
1186 /* Parse the default alternate setting only, as the UVC specification
1187 * defines a single alternate setting, the default alternate setting
1191 while (buflen
> 2) {
1192 if (uvc_parse_vendor_control(dev
, buffer
, buflen
) ||
1193 buffer
[1] != USB_DT_CS_INTERFACE
)
1194 goto next_descriptor
;
1196 if ((ret
= uvc_parse_standard_control(dev
, buffer
, buflen
)) < 0)
1200 buflen
-= buffer
[0];
1201 buffer
+= buffer
[0];
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.
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
;
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
);
1226 /* ------------------------------------------------------------------------
1231 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1232 * and containing the following units:
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)
1242 * The terminal and units must match on of the following structures:
1244 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1245 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1246 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1248 * +---------+ +---------+ -> OTT_*(0)
1249 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1250 * +---------+ +---------+ -> OTT_*(n)
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.
1256 static int uvc_scan_chain_entity(struct uvc_video_chain
*chain
,
1257 struct uvc_entity
*entity
)
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
);
1264 if (entity
->bNrInPins
!= 1) {
1265 uvc_trace(UVC_TRACE_DESCR
, "Extension unit %d has more "
1266 "than 1 input pin.\n", entity
->id
);
1272 case UVC_VC_PROCESSING_UNIT
:
1273 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1274 printk(" <- PU %d", entity
->id
);
1276 if (chain
->processing
!= NULL
) {
1277 uvc_trace(UVC_TRACE_DESCR
, "Found multiple "
1278 "Processing Units in chain.\n");
1282 chain
->processing
= entity
;
1285 case UVC_VC_SELECTOR_UNIT
:
1286 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1287 printk(" <- SU %d", entity
->id
);
1289 /* Single-input selector units are ignored. */
1290 if (entity
->bNrInPins
== 1)
1293 if (chain
->selector
!= NULL
) {
1294 uvc_trace(UVC_TRACE_DESCR
, "Found multiple Selector "
1295 "Units in chain.\n");
1299 chain
->selector
= entity
;
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
);
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
);
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
);
1323 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1324 printk(" OT %d", entity
->id
);
1330 uvc_trace(UVC_TRACE_DESCR
, "Unsupported entity type "
1331 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity
));
1335 list_add_tail(&entity
->chain
, &chain
->entities
);
1339 static int uvc_scan_chain_forward(struct uvc_video_chain
*chain
,
1340 struct uvc_entity
*entity
, struct uvc_entity
*prev
)
1342 struct uvc_entity
*forward
;
1350 forward
= uvc_entity_by_reference(chain
->dev
, entity
->id
,
1352 if (forward
== NULL
)
1354 if (forward
== prev
)
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",
1366 list_add_tail(&forward
->chain
, &chain
->entities
);
1367 if (uvc_trace_param
& UVC_TRACE_PROBE
) {
1371 printk(" XU %d", forward
->id
);
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
);
1386 list_add_tail(&forward
->chain
, &chain
->entities
);
1387 if (uvc_trace_param
& UVC_TRACE_PROBE
) {
1391 printk(" OT %d", forward
->id
);
1403 static int uvc_scan_chain_backward(struct uvc_video_chain
*chain
,
1404 struct uvc_entity
**_entity
)
1406 struct uvc_entity
*entity
= *_entity
;
1407 struct uvc_entity
*term
;
1408 int id
= -EINVAL
, i
;
1410 switch (UVC_ENTITY_TYPE(entity
)) {
1411 case UVC_VC_EXTENSION_UNIT
:
1412 case UVC_VC_PROCESSING_UNIT
:
1413 id
= entity
->baSourceID
[0];
1416 case UVC_VC_SELECTOR_UNIT
:
1417 /* Single-input selector units are ignored. */
1418 if (entity
->bNrInPins
== 1) {
1419 id
= entity
->baSourceID
[0];
1423 if (uvc_trace_param
& UVC_TRACE_PROBE
)
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
);
1437 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1438 printk(" %d", term
->id
);
1440 list_add_tail(&term
->chain
, &chain
->entities
);
1441 uvc_scan_chain_forward(chain
, term
, entity
);
1444 if (uvc_trace_param
& UVC_TRACE_PROBE
)
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;
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
);
1477 static int uvc_scan_chain(struct uvc_video_chain
*chain
,
1478 struct uvc_entity
*term
)
1480 struct uvc_entity
*entity
, *prev
;
1482 uvc_trace(UVC_TRACE_PROBE
, "Scanning UVC chain:");
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
);
1495 /* Process entity */
1496 if (uvc_scan_chain_entity(chain
, entity
) < 0)
1500 if (uvc_scan_chain_forward(chain
, entity
, prev
) < 0)
1505 if (uvc_scan_chain_backward(chain
, &entity
) < 0)
1512 static unsigned int uvc_print_terms(struct list_head
*terms
, u16 dir
,
1515 struct uvc_entity
*term
;
1516 unsigned int nterms
= 0;
1519 list_for_each_entry(term
, terms
, chain
) {
1520 if (!UVC_ENTITY_IS_TERM(term
) ||
1521 UVC_TERM_DIRECTION(term
) != dir
)
1525 p
+= sprintf(p
, ",");
1526 if (++nterms
>= 4) {
1527 p
+= sprintf(p
, "...");
1530 p
+= sprintf(p
, "%u", term
->id
);
1536 static const char *uvc_print_chain(struct uvc_video_chain
*chain
)
1538 static char buffer
[43];
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
);
1549 * Scan the device for video chains and register video devices.
1551 * Chains are scanned starting at their output terminals and walked backwards.
1553 static int uvc_scan_device(struct uvc_device
*dev
)
1555 struct uvc_video_chain
*chain
;
1556 struct uvc_entity
*term
;
1558 list_for_each_entry(term
, &dev
->entities
, list
) {
1559 if (!UVC_ENTITY_IS_OTERM(term
))
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.
1567 if (term
->chain
.next
|| term
->chain
.prev
)
1570 chain
= kzalloc(sizeof(*chain
), GFP_KERNEL
);
1574 INIT_LIST_HEAD(&chain
->entities
);
1575 mutex_init(&chain
->ctrl_mutex
);
1578 if (uvc_scan_chain(chain
, term
) < 0) {
1583 uvc_trace(UVC_TRACE_PROBE
, "Found a valid video chain (%s).\n",
1584 uvc_print_chain(chain
));
1586 list_add_tail(&chain
->list
, &dev
->chains
);
1589 if (list_empty(&dev
->chains
)) {
1590 uvc_printk(KERN_INFO
, "No valid video chain found.\n");
1597 /* ------------------------------------------------------------------------
1598 * Video device registration and unregistration
1602 * Delete the UVC device.
1604 * Called by the kernel when the last reference to the uvc_device structure
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.
1611 static void uvc_delete(struct uvc_device
*dev
)
1613 struct list_head
*p
, *n
;
1615 usb_put_intf(dev
->intf
);
1616 usb_put_dev(dev
->udev
);
1618 uvc_status_cleanup(dev
);
1619 uvc_ctrl_cleanup_device(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
);
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
);
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
);
1641 video_device_release(entity
->vdev
);
1642 entity
->vdev
= NULL
;
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
,
1652 usb_put_intf(streaming
->intf
);
1653 kfree(streaming
->format
);
1654 kfree(streaming
->header
.bmaControls
);
1661 static void uvc_release(struct video_device
*vdev
)
1663 struct uvc_streaming
*stream
= video_get_drvdata(vdev
);
1664 struct uvc_device
*dev
= stream
->dev
;
1666 /* Decrement the registered streams count and delete the device when it
1669 if (atomic_dec_and_test(&dev
->nstreams
))
1674 * Unregister the video devices.
1676 static void uvc_unregister_video(struct uvc_device
*dev
)
1678 struct uvc_streaming
*stream
;
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.
1685 atomic_inc(&dev
->nstreams
);
1687 list_for_each_entry(stream
, &dev
->streams
, list
) {
1688 if (stream
->vdev
== NULL
)
1691 video_unregister_device(stream
->vdev
);
1692 stream
->vdev
= NULL
;
1694 uvc_debugfs_cleanup_stream(stream
);
1697 /* Decrement the stream count and call uvc_delete explicitly if there
1698 * are no stream left.
1700 if (atomic_dec_and_test(&dev
->nstreams
))
1704 static int uvc_register_video(struct uvc_device
*dev
,
1705 struct uvc_streaming
*stream
)
1707 struct video_device
*vdev
;
1710 /* Initialize the streaming interface with default streaming
1713 ret
= uvc_video_init(stream
);
1715 uvc_printk(KERN_ERR
, "Failed to initialize the device "
1720 uvc_debugfs_init_stream(stream
);
1722 /* Register the device with V4L. */
1723 vdev
= video_device_alloc();
1725 uvc_printk(KERN_ERR
, "Failed to allocate video device (%d).\n",
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
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
);
1739 /* Set the driver data before calling video_register_device, otherwise
1740 * uvc_v4l2_open might race us.
1742 stream
->vdev
= vdev
;
1743 video_set_drvdata(vdev
, stream
);
1745 ret
= video_register_device(vdev
, VFL_TYPE_GRABBER
, -1);
1747 uvc_printk(KERN_ERR
, "Failed to register video device (%d).\n",
1749 stream
->vdev
= NULL
;
1750 video_device_release(vdev
);
1754 atomic_inc(&dev
->nstreams
);
1759 * Register all video devices in all chains.
1761 static int uvc_register_terms(struct uvc_device
*dev
,
1762 struct uvc_video_chain
*chain
)
1764 struct uvc_streaming
*stream
;
1765 struct uvc_entity
*term
;
1768 list_for_each_entry(term
, &chain
->entities
, chain
) {
1769 if (UVC_ENTITY_TYPE(term
) != UVC_TT_STREAMING
)
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
);
1779 stream
->chain
= chain
;
1780 ret
= uvc_register_video(dev
, stream
);
1784 term
->vdev
= stream
->vdev
;
1790 static int uvc_register_chains(struct uvc_device
*dev
)
1792 struct uvc_video_chain
*chain
;
1795 list_for_each_entry(chain
, &dev
->chains
, list
) {
1796 ret
= uvc_register_terms(dev
, chain
);
1800 #ifdef CONFIG_MEDIA_CONTROLLER
1801 ret
= uvc_mc_register_entities(chain
);
1803 uvc_printk(KERN_INFO
, "Failed to register entites "
1812 /* ------------------------------------------------------------------------
1813 * USB probe, disconnect, suspend and resume
1816 static int uvc_probe(struct usb_interface
*intf
,
1817 const struct usb_device_id
*id
)
1819 struct usb_device
*udev
= interface_to_usbdev(intf
);
1820 struct uvc_device
*dev
;
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
,
1828 uvc_trace(UVC_TRACE_PROBE
, "Probing generic UVC device %s\n",
1831 /* Allocate memory for the device and initialize it. */
1832 if ((dev
= kzalloc(sizeof *dev
, GFP_KERNEL
)) == NULL
)
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);
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
;
1848 if (udev
->product
!= NULL
)
1849 strlcpy(dev
->name
, udev
->product
, sizeof dev
->name
);
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
));
1856 /* Parse the Video Class control descriptor. */
1857 if (uvc_parse_control(dev
) < 0) {
1858 uvc_trace(UVC_TRACE_PROBE
, "Unable to parse UVC "
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
));
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");
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
));
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)
1889 dev
->vdev
.mdev
= &dev
->mdev
;
1891 if (v4l2_device_register(&intf
->dev
, &dev
->vdev
) < 0)
1894 /* Initialize controls. */
1895 if (uvc_ctrl_init_device(dev
) < 0)
1898 /* Scan the device for video chains. */
1899 if (uvc_scan_device(dev
) < 0)
1902 /* Register video device nodes. */
1903 if (uvc_register_chains(dev
) < 0)
1906 /* Save our data pointer in the interface data. */
1907 usb_set_intfdata(intf
, dev
);
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
);
1916 uvc_trace(UVC_TRACE_PROBE
, "UVC device initialized.\n");
1917 usb_enable_autosuspend(udev
);
1921 uvc_unregister_video(dev
);
1925 static void uvc_disconnect(struct usb_interface
*intf
)
1927 struct uvc_device
*dev
= usb_get_intfdata(intf
);
1929 /* Set the USB interface data to NULL. This can be done outside the
1930 * lock, as there's no other reader.
1932 usb_set_intfdata(intf
, NULL
);
1934 if (intf
->cur_altsetting
->desc
.bInterfaceSubClass
==
1935 UVC_SC_VIDEOSTREAMING
)
1938 dev
->state
|= UVC_DEV_DISCONNECTED
;
1940 uvc_unregister_video(dev
);
1943 static int uvc_suspend(struct usb_interface
*intf
, pm_message_t message
)
1945 struct uvc_device
*dev
= usb_get_intfdata(intf
);
1946 struct uvc_streaming
*stream
;
1948 uvc_trace(UVC_TRACE_SUSPEND
, "Suspending interface %u\n",
1949 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
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
);
1956 list_for_each_entry(stream
, &dev
->streams
, list
) {
1957 if (stream
->intf
== intf
)
1958 return uvc_video_suspend(stream
);
1961 uvc_trace(UVC_TRACE_SUSPEND
, "Suspend: video streaming USB interface "
1966 static int __uvc_resume(struct usb_interface
*intf
, int reset
)
1968 struct uvc_device
*dev
= usb_get_intfdata(intf
);
1969 struct uvc_streaming
*stream
;
1971 uvc_trace(UVC_TRACE_SUSPEND
, "Resuming interface %u\n",
1972 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
1974 if (intf
->cur_altsetting
->desc
.bInterfaceSubClass
==
1975 UVC_SC_VIDEOCONTROL
) {
1977 int ret
= uvc_ctrl_resume_device(dev
);
1983 return uvc_status_resume(dev
);
1986 list_for_each_entry(stream
, &dev
->streams
, list
) {
1987 if (stream
->intf
== intf
)
1988 return uvc_video_resume(stream
, reset
);
1991 uvc_trace(UVC_TRACE_SUSPEND
, "Resume: video streaming USB interface "
1996 static int uvc_resume(struct usb_interface
*intf
)
1998 return __uvc_resume(intf
, 0);
2001 static int uvc_reset_resume(struct usb_interface
*intf
)
2003 return __uvc_resume(intf
, 1);
2006 /* ------------------------------------------------------------------------
2010 static int uvc_clock_param_get(char *buffer
, struct kernel_param
*kp
)
2012 if (uvc_clock_param
== CLOCK_MONOTONIC
)
2013 return sprintf(buffer
, "CLOCK_MONOTONIC");
2015 return sprintf(buffer
, "CLOCK_REALTIME");
2018 static int uvc_clock_param_set(const char *val
, struct kernel_param
*kp
)
2020 if (strncasecmp(val
, "clock_", strlen("clock_")) == 0)
2021 val
+= strlen("clock_");
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
;
2033 module_param_call(clock
, uvc_clock_param_set
, uvc_clock_param_get
,
2034 &uvc_clock_param
, S_IRUGO
|S_IWUSR
);
2035 MODULE_PARM_DESC(clock
, "Video buffers timestamp clock");
2036 module_param_named(nodrop
, uvc_no_drop_param
, uint
, S_IRUGO
|S_IWUSR
);
2037 MODULE_PARM_DESC(nodrop
, "Don't drop incomplete frames");
2038 module_param_named(quirks
, uvc_quirks_param
, uint
, S_IRUGO
|S_IWUSR
);
2039 MODULE_PARM_DESC(quirks
, "Forced device quirks");
2040 module_param_named(trace
, uvc_trace_param
, uint
, S_IRUGO
|S_IWUSR
);
2041 MODULE_PARM_DESC(trace
, "Trace level bitmask");
2042 module_param_named(timeout
, uvc_timeout_param
, uint
, S_IRUGO
|S_IWUSR
);
2043 MODULE_PARM_DESC(timeout
, "Streaming control requests timeout");
2045 /* ------------------------------------------------------------------------
2046 * Driver initialization and cleanup
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.
2054 static 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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
2198 .idProduct
= 0x300c,
2199 .bInterfaceClass
= USB_CLASS_VIDEO
,
2200 .bInterfaceSubClass
= 1,
2201 .bInterfaceProtocol
= 0,
2202 .driver_info
= UVC_QUIRK_FIX_BANDWIDTH
},
2204 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2205 | USB_DEVICE_ID_MATCH_INT_INFO
,
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
,
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
,
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
,
2234 .idProduct
= 0x0555,
2235 .bInterfaceClass
= USB_CLASS_VIDEO
,
2236 .bInterfaceSubClass
= 1,
2237 .bInterfaceProtocol
= 0,
2238 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
2240 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2241 | USB_DEVICE_ID_MATCH_INT_INFO
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
2316 .idProduct
= 0x8a34,
2317 .bInterfaceClass
= USB_CLASS_VIDEO
,
2318 .bInterfaceSubClass
= 1,
2319 .bInterfaceProtocol
= 0,
2320 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2322 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2323 | USB_DEVICE_ID_MATCH_INT_INFO
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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
,
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) },
2428 MODULE_DEVICE_TABLE(usb
, uvc_ids
);
2430 struct uvc_driver uvc_driver
= {
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,
2443 static int __init
uvc_init(void)
2449 ret
= usb_register(&uvc_driver
.driver
);
2451 uvc_debugfs_cleanup();
2455 printk(KERN_INFO DRIVER_DESC
" (" DRIVER_VERSION
")\n");
2459 static void __exit
uvc_cleanup(void)
2461 usb_deregister(&uvc_driver
.driver
);
2462 uvc_debugfs_cleanup();
2465 module_init(uvc_init
);
2466 module_exit(uvc_cleanup
);
2468 MODULE_AUTHOR(DRIVER_AUTHOR
);
2469 MODULE_DESCRIPTION(DRIVER_DESC
);
2470 MODULE_LICENSE("GPL");
2471 MODULE_VERSION(DRIVER_VERSION
);