2 * uvc_driver.c -- USB Video Class driver
4 * Copyright (C) 2005-2009
5 * Laurent Pinchart (laurent.pinchart@skynet.be)
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/kernel.h>
27 #include <linux/list.h>
28 #include <linux/module.h>
29 #include <linux/usb.h>
30 #include <linux/videodev2.h>
31 #include <linux/vmalloc.h>
32 #include <linux/wait.h>
33 #include <asm/atomic.h>
34 #include <asm/unaligned.h>
36 #include <media/v4l2-common.h>
40 #define DRIVER_AUTHOR "Laurent Pinchart <laurent.pinchart@skynet.be>"
41 #define DRIVER_DESC "USB Video Class driver"
42 #ifndef DRIVER_VERSION
43 #define DRIVER_VERSION "v0.1.0"
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 4:2:2 (UYVY)",
89 .guid
= UVC_GUID_FORMAT_UYVY
,
90 .fcc
= V4L2_PIX_FMT_UYVY
,
94 .guid
= UVC_GUID_FORMAT_Y800
,
95 .fcc
= V4L2_PIX_FMT_GREY
,
99 .guid
= UVC_GUID_FORMAT_BY8
,
100 .fcc
= V4L2_PIX_FMT_SBGGR8
,
104 /* ------------------------------------------------------------------------
108 struct usb_host_endpoint
*uvc_find_endpoint(struct usb_host_interface
*alts
,
111 struct usb_host_endpoint
*ep
;
114 for (i
= 0; i
< alts
->desc
.bNumEndpoints
; ++i
) {
115 ep
= &alts
->endpoint
[i
];
116 if (ep
->desc
.bEndpointAddress
== epaddr
)
123 static struct uvc_format_desc
*uvc_format_by_guid(const __u8 guid
[16])
125 unsigned int len
= ARRAY_SIZE(uvc_fmts
);
128 for (i
= 0; i
< len
; ++i
) {
129 if (memcmp(guid
, uvc_fmts
[i
].guid
, 16) == 0)
136 static __u32
uvc_colorspace(const __u8 primaries
)
138 static const __u8 colorprimaries
[] = {
140 V4L2_COLORSPACE_SRGB
,
141 V4L2_COLORSPACE_470_SYSTEM_M
,
142 V4L2_COLORSPACE_470_SYSTEM_BG
,
143 V4L2_COLORSPACE_SMPTE170M
,
144 V4L2_COLORSPACE_SMPTE240M
,
147 if (primaries
< ARRAY_SIZE(colorprimaries
))
148 return colorprimaries
[primaries
];
153 /* Simplify a fraction using a simple continued fraction decomposition. The
154 * idea here is to convert fractions such as 333333/10000000 to 1/30 using
155 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
156 * arbitrary parameters to remove non-significative terms from the simple
157 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
158 * respectively seems to give nice results.
160 void uvc_simplify_fraction(uint32_t *numerator
, uint32_t *denominator
,
161 unsigned int n_terms
, unsigned int threshold
)
167 an
= kmalloc(n_terms
* sizeof *an
, GFP_KERNEL
);
171 /* Convert the fraction to a simple continued fraction. See
172 * http://mathforum.org/dr.math/faq/faq.fractions.html
173 * Stop if the current term is bigger than or equal to the given
179 for (n
= 0; n
< n_terms
&& y
!= 0; ++n
) {
181 if (an
[n
] >= threshold
) {
192 /* Expand the simple continued fraction back to an integer fraction. */
196 for (i
= n
; i
> 0; --i
) {
207 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
208 * to compute numerator / denominator * 10000000 using 32 bit fixed point
211 uint32_t uvc_fraction_to_interval(uint32_t numerator
, uint32_t denominator
)
215 /* Saturate the result if the operation would overflow. */
216 if (denominator
== 0 ||
217 numerator
/denominator
>= ((uint32_t)-1)/10000000)
220 /* Divide both the denominator and the multiplier by two until
221 * numerator * multiplier doesn't overflow. If anyone knows a better
222 * algorithm please let me know.
224 multiplier
= 10000000;
225 while (numerator
> ((uint32_t)-1)/multiplier
) {
230 return denominator
? numerator
* multiplier
/ denominator
: 0;
233 /* ------------------------------------------------------------------------
234 * Terminal and unit management
237 static struct uvc_entity
*uvc_entity_by_id(struct uvc_device
*dev
, int id
)
239 struct uvc_entity
*entity
;
241 list_for_each_entry(entity
, &dev
->entities
, list
) {
242 if (entity
->id
== id
)
249 static struct uvc_entity
*uvc_entity_by_reference(struct uvc_device
*dev
,
250 int id
, struct uvc_entity
*entity
)
255 entity
= list_entry(&dev
->entities
, struct uvc_entity
, list
);
257 list_for_each_entry_continue(entity
, &dev
->entities
, list
) {
258 for (i
= 0; i
< entity
->bNrInPins
; ++i
)
259 if (entity
->baSourceID
[i
] == id
)
266 static struct uvc_streaming
*uvc_stream_by_id(struct uvc_device
*dev
, int id
)
268 struct uvc_streaming
*stream
;
270 list_for_each_entry(stream
, &dev
->streams
, list
) {
271 if (stream
->header
.bTerminalLink
== id
)
278 /* ------------------------------------------------------------------------
279 * Descriptors parsing
282 static int uvc_parse_format(struct uvc_device
*dev
,
283 struct uvc_streaming
*streaming
, struct uvc_format
*format
,
284 __u32
**intervals
, unsigned char *buffer
, int buflen
)
286 struct usb_interface
*intf
= streaming
->intf
;
287 struct usb_host_interface
*alts
= intf
->cur_altsetting
;
288 struct uvc_format_desc
*fmtdesc
;
289 struct uvc_frame
*frame
;
290 const unsigned char *start
= buffer
;
291 unsigned int interval
;
295 format
->type
= buffer
[2];
296 format
->index
= buffer
[3];
299 case UVC_VS_FORMAT_UNCOMPRESSED
:
300 case UVC_VS_FORMAT_FRAME_BASED
:
301 n
= buffer
[2] == UVC_VS_FORMAT_UNCOMPRESSED
? 27 : 28;
303 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
304 "interface %d FORMAT error\n",
306 alts
->desc
.bInterfaceNumber
);
310 /* Find the format descriptor from its GUID. */
311 fmtdesc
= uvc_format_by_guid(&buffer
[5]);
313 if (fmtdesc
!= NULL
) {
314 strlcpy(format
->name
, fmtdesc
->name
,
315 sizeof format
->name
);
316 format
->fcc
= fmtdesc
->fcc
;
318 uvc_printk(KERN_INFO
, "Unknown video format "
319 UVC_GUID_FORMAT
"\n",
320 UVC_GUID_ARGS(&buffer
[5]));
321 snprintf(format
->name
, sizeof format
->name
,
322 UVC_GUID_FORMAT
, UVC_GUID_ARGS(&buffer
[5]));
326 format
->bpp
= buffer
[21];
327 if (buffer
[2] == UVC_VS_FORMAT_UNCOMPRESSED
) {
328 ftype
= UVC_VS_FRAME_UNCOMPRESSED
;
330 ftype
= UVC_VS_FRAME_FRAME_BASED
;
332 format
->flags
= UVC_FMT_FLAG_COMPRESSED
;
336 case UVC_VS_FORMAT_MJPEG
:
338 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
339 "interface %d FORMAT error\n",
341 alts
->desc
.bInterfaceNumber
);
345 strlcpy(format
->name
, "MJPEG", sizeof format
->name
);
346 format
->fcc
= V4L2_PIX_FMT_MJPEG
;
347 format
->flags
= UVC_FMT_FLAG_COMPRESSED
;
349 ftype
= UVC_VS_FRAME_MJPEG
;
352 case UVC_VS_FORMAT_DV
:
354 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
355 "interface %d FORMAT error\n",
357 alts
->desc
.bInterfaceNumber
);
361 switch (buffer
[8] & 0x7f) {
363 strlcpy(format
->name
, "SD-DV", sizeof format
->name
);
366 strlcpy(format
->name
, "SDL-DV", sizeof format
->name
);
369 strlcpy(format
->name
, "HD-DV", sizeof format
->name
);
372 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
373 "interface %d: unknown DV format %u\n",
375 alts
->desc
.bInterfaceNumber
, buffer
[8]);
379 strlcat(format
->name
, buffer
[8] & (1 << 7) ? " 60Hz" : " 50Hz",
380 sizeof format
->name
);
382 format
->fcc
= V4L2_PIX_FMT_DV
;
383 format
->flags
= UVC_FMT_FLAG_COMPRESSED
| UVC_FMT_FLAG_STREAM
;
387 /* Create a dummy frame descriptor. */
388 frame
= &format
->frame
[0];
389 memset(&format
->frame
[0], 0, sizeof format
->frame
[0]);
390 frame
->bFrameIntervalType
= 1;
391 frame
->dwDefaultFrameInterval
= 1;
392 frame
->dwFrameInterval
= *intervals
;
397 case UVC_VS_FORMAT_MPEG2TS
:
398 case UVC_VS_FORMAT_STREAM_BASED
:
399 /* Not supported yet. */
401 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
402 "interface %d unsupported format %u\n",
403 dev
->udev
->devnum
, alts
->desc
.bInterfaceNumber
,
408 uvc_trace(UVC_TRACE_DESCR
, "Found format %s.\n", format
->name
);
413 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
414 * based formats have frame descriptors.
416 while (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
&&
417 buffer
[2] == ftype
) {
418 frame
= &format
->frame
[format
->nframes
];
419 if (ftype
!= UVC_VS_FRAME_FRAME_BASED
)
420 n
= buflen
> 25 ? buffer
[25] : 0;
422 n
= buflen
> 21 ? buffer
[21] : 0;
426 if (buflen
< 26 + 4*n
) {
427 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
428 "interface %d FRAME error\n", dev
->udev
->devnum
,
429 alts
->desc
.bInterfaceNumber
);
433 frame
->bFrameIndex
= buffer
[3];
434 frame
->bmCapabilities
= buffer
[4];
435 frame
->wWidth
= get_unaligned_le16(&buffer
[5]);
436 frame
->wHeight
= get_unaligned_le16(&buffer
[7]);
437 frame
->dwMinBitRate
= get_unaligned_le32(&buffer
[9]);
438 frame
->dwMaxBitRate
= get_unaligned_le32(&buffer
[13]);
439 if (ftype
!= UVC_VS_FRAME_FRAME_BASED
) {
440 frame
->dwMaxVideoFrameBufferSize
=
441 get_unaligned_le32(&buffer
[17]);
442 frame
->dwDefaultFrameInterval
=
443 get_unaligned_le32(&buffer
[21]);
444 frame
->bFrameIntervalType
= buffer
[25];
446 frame
->dwMaxVideoFrameBufferSize
= 0;
447 frame
->dwDefaultFrameInterval
=
448 get_unaligned_le32(&buffer
[17]);
449 frame
->bFrameIntervalType
= buffer
[21];
451 frame
->dwFrameInterval
= *intervals
;
453 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
454 * completely. Observed behaviours range from setting the
455 * value to 1.1x the actual frame size to hardwiring the
456 * 16 low bits to 0. This results in a higher than necessary
457 * memory usage as well as a wrong image size information. For
458 * uncompressed formats this can be fixed by computing the
459 * value from the frame size.
461 if (!(format
->flags
& UVC_FMT_FLAG_COMPRESSED
))
462 frame
->dwMaxVideoFrameBufferSize
= format
->bpp
463 * frame
->wWidth
* frame
->wHeight
/ 8;
465 /* Some bogus devices report dwMinFrameInterval equal to
466 * dwMaxFrameInterval and have dwFrameIntervalStep set to
467 * zero. Setting all null intervals to 1 fixes the problem and
468 * some other divisions by zero that could happen.
470 for (i
= 0; i
< n
; ++i
) {
471 interval
= get_unaligned_le32(&buffer
[26+4*i
]);
472 *(*intervals
)++ = interval
? interval
: 1;
475 /* Make sure that the default frame interval stays between
478 n
-= frame
->bFrameIntervalType
? 1 : 2;
479 frame
->dwDefaultFrameInterval
=
480 min(frame
->dwFrameInterval
[n
],
481 max(frame
->dwFrameInterval
[0],
482 frame
->dwDefaultFrameInterval
));
484 uvc_trace(UVC_TRACE_DESCR
, "- %ux%u (%u.%u fps)\n",
485 frame
->wWidth
, frame
->wHeight
,
486 10000000/frame
->dwDefaultFrameInterval
,
487 (100000000/frame
->dwDefaultFrameInterval
)%10);
494 if (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
&&
495 buffer
[2] == UVC_VS_STILL_IMAGE_FRAME
) {
500 if (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
&&
501 buffer
[2] == UVC_VS_COLORFORMAT
) {
503 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
504 "interface %d COLORFORMAT error\n",
506 alts
->desc
.bInterfaceNumber
);
510 format
->colorspace
= uvc_colorspace(buffer
[3]);
516 return buffer
- start
;
519 static int uvc_parse_streaming(struct uvc_device
*dev
,
520 struct usb_interface
*intf
)
522 struct uvc_streaming
*streaming
= NULL
;
523 struct uvc_format
*format
;
524 struct uvc_frame
*frame
;
525 struct usb_host_interface
*alts
= &intf
->altsetting
[0];
526 unsigned char *_buffer
, *buffer
= alts
->extra
;
527 int _buflen
, buflen
= alts
->extralen
;
528 unsigned int nformats
= 0, nframes
= 0, nintervals
= 0;
529 unsigned int size
, i
, n
, p
;
534 if (intf
->cur_altsetting
->desc
.bInterfaceSubClass
535 != UVC_SC_VIDEOSTREAMING
) {
536 uvc_trace(UVC_TRACE_DESCR
, "device %d interface %d isn't a "
537 "video streaming interface\n", dev
->udev
->devnum
,
538 intf
->altsetting
[0].desc
.bInterfaceNumber
);
542 if (usb_driver_claim_interface(&uvc_driver
.driver
, intf
, dev
)) {
543 uvc_trace(UVC_TRACE_DESCR
, "device %d interface %d is already "
544 "claimed\n", dev
->udev
->devnum
,
545 intf
->altsetting
[0].desc
.bInterfaceNumber
);
549 streaming
= kzalloc(sizeof *streaming
, GFP_KERNEL
);
550 if (streaming
== NULL
) {
551 usb_driver_release_interface(&uvc_driver
.driver
, intf
);
555 mutex_init(&streaming
->mutex
);
556 streaming
->dev
= dev
;
557 streaming
->intf
= usb_get_intf(intf
);
558 streaming
->intfnum
= intf
->cur_altsetting
->desc
.bInterfaceNumber
;
560 /* The Pico iMage webcam has its class-specific interface descriptors
561 * after the endpoint descriptors.
564 for (i
= 0; i
< alts
->desc
.bNumEndpoints
; ++i
) {
565 struct usb_host_endpoint
*ep
= &alts
->endpoint
[i
];
567 if (ep
->extralen
== 0)
570 if (ep
->extralen
> 2 &&
571 ep
->extra
[1] == USB_DT_CS_INTERFACE
) {
572 uvc_trace(UVC_TRACE_DESCR
, "trying extra data "
573 "from endpoint %u.\n", i
);
574 buffer
= alts
->endpoint
[i
].extra
;
575 buflen
= alts
->endpoint
[i
].extralen
;
581 /* Skip the standard interface descriptors. */
582 while (buflen
> 2 && buffer
[1] != USB_DT_CS_INTERFACE
) {
588 uvc_trace(UVC_TRACE_DESCR
, "no class-specific streaming "
589 "interface descriptors found.\n");
593 /* Parse the header descriptor. */
595 case UVC_VS_OUTPUT_HEADER
:
596 streaming
->type
= V4L2_BUF_TYPE_VIDEO_OUTPUT
;
600 case UVC_VS_INPUT_HEADER
:
601 streaming
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
606 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming interface "
607 "%d HEADER descriptor not found.\n", dev
->udev
->devnum
,
608 alts
->desc
.bInterfaceNumber
);
612 p
= buflen
>= 4 ? buffer
[3] : 0;
613 n
= buflen
>= size
? buffer
[size
-1] : 0;
615 if (buflen
< size
+ p
*n
) {
616 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
617 "interface %d HEADER descriptor is invalid.\n",
618 dev
->udev
->devnum
, alts
->desc
.bInterfaceNumber
);
622 streaming
->header
.bNumFormats
= p
;
623 streaming
->header
.bEndpointAddress
= buffer
[6];
624 if (buffer
[2] == UVC_VS_INPUT_HEADER
) {
625 streaming
->header
.bmInfo
= buffer
[7];
626 streaming
->header
.bTerminalLink
= buffer
[8];
627 streaming
->header
.bStillCaptureMethod
= buffer
[9];
628 streaming
->header
.bTriggerSupport
= buffer
[10];
629 streaming
->header
.bTriggerUsage
= buffer
[11];
631 streaming
->header
.bTerminalLink
= buffer
[7];
633 streaming
->header
.bControlSize
= n
;
635 streaming
->header
.bmaControls
= kmalloc(p
*n
, GFP_KERNEL
);
636 if (streaming
->header
.bmaControls
== NULL
) {
641 memcpy(streaming
->header
.bmaControls
, &buffer
[size
], p
*n
);
649 /* Count the format and frame descriptors. */
650 while (_buflen
> 2 && _buffer
[1] == USB_DT_CS_INTERFACE
) {
651 switch (_buffer
[2]) {
652 case UVC_VS_FORMAT_UNCOMPRESSED
:
653 case UVC_VS_FORMAT_MJPEG
:
654 case UVC_VS_FORMAT_FRAME_BASED
:
658 case UVC_VS_FORMAT_DV
:
659 /* DV format has no frame descriptor. We will create a
660 * dummy frame descriptor with a dummy frame interval.
667 case UVC_VS_FORMAT_MPEG2TS
:
668 case UVC_VS_FORMAT_STREAM_BASED
:
669 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming "
670 "interface %d FORMAT %u is not supported.\n",
672 alts
->desc
.bInterfaceNumber
, _buffer
[2]);
675 case UVC_VS_FRAME_UNCOMPRESSED
:
676 case UVC_VS_FRAME_MJPEG
:
679 nintervals
+= _buffer
[25] ? _buffer
[25] : 3;
682 case UVC_VS_FRAME_FRAME_BASED
:
685 nintervals
+= _buffer
[21] ? _buffer
[21] : 3;
689 _buflen
-= _buffer
[0];
690 _buffer
+= _buffer
[0];
694 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming interface "
695 "%d has no supported formats defined.\n",
696 dev
->udev
->devnum
, alts
->desc
.bInterfaceNumber
);
700 size
= nformats
* sizeof *format
+ nframes
* sizeof *frame
701 + nintervals
* sizeof *interval
;
702 format
= kzalloc(size
, GFP_KERNEL
);
703 if (format
== NULL
) {
708 frame
= (struct uvc_frame
*)&format
[nformats
];
709 interval
= (__u32
*)&frame
[nframes
];
711 streaming
->format
= format
;
712 streaming
->nformats
= nformats
;
714 /* Parse the format descriptors. */
715 while (buflen
> 2 && buffer
[1] == USB_DT_CS_INTERFACE
) {
717 case UVC_VS_FORMAT_UNCOMPRESSED
:
718 case UVC_VS_FORMAT_MJPEG
:
719 case UVC_VS_FORMAT_DV
:
720 case UVC_VS_FORMAT_FRAME_BASED
:
721 format
->frame
= frame
;
722 ret
= uvc_parse_format(dev
, streaming
, format
,
723 &interval
, buffer
, buflen
);
727 frame
+= format
->nframes
;
743 uvc_trace(UVC_TRACE_DESCR
, "device %d videostreaming interface "
744 "%d has %u bytes of trailing descriptor garbage.\n",
745 dev
->udev
->devnum
, alts
->desc
.bInterfaceNumber
, buflen
);
747 /* Parse the alternate settings to find the maximum bandwidth. */
748 for (i
= 0; i
< intf
->num_altsetting
; ++i
) {
749 struct usb_host_endpoint
*ep
;
750 alts
= &intf
->altsetting
[i
];
751 ep
= uvc_find_endpoint(alts
,
752 streaming
->header
.bEndpointAddress
);
756 psize
= le16_to_cpu(ep
->desc
.wMaxPacketSize
);
757 psize
= (psize
& 0x07ff) * (1 + ((psize
>> 11) & 3));
758 if (psize
> streaming
->maxpsize
)
759 streaming
->maxpsize
= psize
;
762 list_add_tail(&streaming
->list
, &dev
->streams
);
766 usb_driver_release_interface(&uvc_driver
.driver
, intf
);
768 kfree(streaming
->format
);
769 kfree(streaming
->header
.bmaControls
);
774 static struct uvc_entity
*uvc_alloc_entity(u16 type
, u8 id
,
775 unsigned int num_pads
, unsigned int extra_size
)
777 struct uvc_entity
*entity
;
778 unsigned int num_inputs
;
781 num_inputs
= (type
& UVC_TERM_OUTPUT
) ? num_pads
: num_pads
- 1;
782 size
= sizeof(*entity
) + extra_size
+ num_inputs
;
783 entity
= kzalloc(size
, GFP_KERNEL
);
790 entity
->bNrInPins
= num_inputs
;
791 entity
->baSourceID
= ((__u8
*)entity
) + sizeof(*entity
) + extra_size
;
796 /* Parse vendor-specific extensions. */
797 static int uvc_parse_vendor_control(struct uvc_device
*dev
,
798 const unsigned char *buffer
, int buflen
)
800 struct usb_device
*udev
= dev
->udev
;
801 struct usb_host_interface
*alts
= dev
->intf
->cur_altsetting
;
802 struct uvc_entity
*unit
;
806 switch (le16_to_cpu(dev
->udev
->descriptor
.idVendor
)) {
807 case 0x046d: /* Logitech */
808 if (buffer
[1] != 0x41 || buffer
[2] != 0x01)
811 /* Logitech implements several vendor specific functions
812 * through vendor specific extension units (LXU).
814 * The LXU descriptors are similar to XU descriptors
815 * (see "USB Device Video Class for Video Devices", section
816 * 3.7.2.6 "Extension Unit Descriptor") with the following
819 * ----------------------------------------------------------
821 * Size of this descriptor, in bytes: 24+p+n*2
822 * ----------------------------------------------------------
823 * 23+p+n bmControlsType N Bitmap
824 * Individual bits in the set are defined:
828 * This bitset is mapped exactly the same as bmControls.
829 * ----------------------------------------------------------
830 * 23+p+n*2 bReserved 1 Boolean
831 * ----------------------------------------------------------
832 * 24+p+n*2 iExtension 1 Index
833 * Index of a string descriptor that describes this
835 * ----------------------------------------------------------
837 p
= buflen
>= 22 ? buffer
[21] : 0;
838 n
= buflen
>= 25 + p
? buffer
[22+p
] : 0;
840 if (buflen
< 25 + p
+ 2*n
) {
841 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
842 "interface %d EXTENSION_UNIT error\n",
843 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
847 unit
= uvc_alloc_entity(UVC_VC_EXTENSION_UNIT
, buffer
[3],
852 memcpy(unit
->extension
.guidExtensionCode
, &buffer
[4], 16);
853 unit
->extension
.bNumControls
= buffer
[20];
854 memcpy(unit
->baSourceID
, &buffer
[22], p
);
855 unit
->extension
.bControlSize
= buffer
[22+p
];
856 unit
->extension
.bmControls
= (__u8
*)unit
+ sizeof(*unit
);
857 unit
->extension
.bmControlsType
= (__u8
*)unit
+ sizeof(*unit
)
859 memcpy(unit
->extension
.bmControls
, &buffer
[23+p
], 2*n
);
861 if (buffer
[24+p
+2*n
] != 0)
862 usb_string(udev
, buffer
[24+p
+2*n
], unit
->name
,
865 sprintf(unit
->name
, "Extension %u", buffer
[3]);
867 list_add_tail(&unit
->list
, &dev
->entities
);
875 static int uvc_parse_standard_control(struct uvc_device
*dev
,
876 const unsigned char *buffer
, int buflen
)
878 struct usb_device
*udev
= dev
->udev
;
879 struct uvc_entity
*unit
, *term
;
880 struct usb_interface
*intf
;
881 struct usb_host_interface
*alts
= dev
->intf
->cur_altsetting
;
882 unsigned int i
, n
, p
, len
;
887 n
= buflen
>= 12 ? buffer
[11] : 0;
889 if (buflen
< 12 || buflen
< 12 + n
) {
890 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
891 "interface %d HEADER error\n", udev
->devnum
,
892 alts
->desc
.bInterfaceNumber
);
896 dev
->uvc_version
= get_unaligned_le16(&buffer
[3]);
897 dev
->clock_frequency
= get_unaligned_le32(&buffer
[7]);
899 /* Parse all USB Video Streaming interfaces. */
900 for (i
= 0; i
< n
; ++i
) {
901 intf
= usb_ifnum_to_if(udev
, buffer
[12+i
]);
903 uvc_trace(UVC_TRACE_DESCR
, "device %d "
904 "interface %d doesn't exists\n",
909 uvc_parse_streaming(dev
, intf
);
913 case UVC_VC_INPUT_TERMINAL
:
915 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
916 "interface %d INPUT_TERMINAL error\n",
917 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
921 /* Make sure the terminal type MSB is not null, otherwise it
922 * could be confused with a unit.
924 type
= get_unaligned_le16(&buffer
[4]);
925 if ((type
& 0xff00) == 0) {
926 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
927 "interface %d INPUT_TERMINAL %d has invalid "
928 "type 0x%04x, skipping\n", udev
->devnum
,
929 alts
->desc
.bInterfaceNumber
,
938 if (type
== UVC_ITT_CAMERA
) {
939 n
= buflen
>= 15 ? buffer
[14] : 0;
942 } else if (type
== UVC_ITT_MEDIA_TRANSPORT_INPUT
) {
943 n
= buflen
>= 9 ? buffer
[8] : 0;
944 p
= buflen
>= 10 + n
? buffer
[9+n
] : 0;
948 if (buflen
< len
+ n
+ p
) {
949 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
950 "interface %d INPUT_TERMINAL error\n",
951 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
955 term
= uvc_alloc_entity(type
| UVC_TERM_INPUT
, buffer
[3],
960 if (UVC_ENTITY_TYPE(term
) == UVC_ITT_CAMERA
) {
961 term
->camera
.bControlSize
= n
;
962 term
->camera
.bmControls
= (__u8
*)term
+ sizeof *term
;
963 term
->camera
.wObjectiveFocalLengthMin
=
964 get_unaligned_le16(&buffer
[8]);
965 term
->camera
.wObjectiveFocalLengthMax
=
966 get_unaligned_le16(&buffer
[10]);
967 term
->camera
.wOcularFocalLength
=
968 get_unaligned_le16(&buffer
[12]);
969 memcpy(term
->camera
.bmControls
, &buffer
[15], n
);
970 } else if (UVC_ENTITY_TYPE(term
) ==
971 UVC_ITT_MEDIA_TRANSPORT_INPUT
) {
972 term
->media
.bControlSize
= n
;
973 term
->media
.bmControls
= (__u8
*)term
+ sizeof *term
;
974 term
->media
.bTransportModeSize
= p
;
975 term
->media
.bmTransportModes
= (__u8
*)term
977 memcpy(term
->media
.bmControls
, &buffer
[9], n
);
978 memcpy(term
->media
.bmTransportModes
, &buffer
[10+n
], p
);
982 usb_string(udev
, buffer
[7], term
->name
,
984 else if (UVC_ENTITY_TYPE(term
) == UVC_ITT_CAMERA
)
985 sprintf(term
->name
, "Camera %u", buffer
[3]);
986 else if (UVC_ENTITY_TYPE(term
) == UVC_ITT_MEDIA_TRANSPORT_INPUT
)
987 sprintf(term
->name
, "Media %u", buffer
[3]);
989 sprintf(term
->name
, "Input %u", buffer
[3]);
991 list_add_tail(&term
->list
, &dev
->entities
);
994 case UVC_VC_OUTPUT_TERMINAL
:
996 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
997 "interface %d OUTPUT_TERMINAL error\n",
998 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
1002 /* Make sure the terminal type MSB is not null, otherwise it
1003 * could be confused with a unit.
1005 type
= get_unaligned_le16(&buffer
[4]);
1006 if ((type
& 0xff00) == 0) {
1007 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
1008 "interface %d OUTPUT_TERMINAL %d has invalid "
1009 "type 0x%04x, skipping\n", udev
->devnum
,
1010 alts
->desc
.bInterfaceNumber
, buffer
[3], type
);
1014 term
= uvc_alloc_entity(type
| UVC_TERM_OUTPUT
, buffer
[3],
1019 memcpy(term
->baSourceID
, &buffer
[7], 1);
1022 usb_string(udev
, buffer
[8], term
->name
,
1025 sprintf(term
->name
, "Output %u", buffer
[3]);
1027 list_add_tail(&term
->list
, &dev
->entities
);
1030 case UVC_VC_SELECTOR_UNIT
:
1031 p
= buflen
>= 5 ? buffer
[4] : 0;
1033 if (buflen
< 5 || buflen
< 6 + p
) {
1034 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
1035 "interface %d SELECTOR_UNIT error\n",
1036 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
1040 unit
= uvc_alloc_entity(buffer
[2], buffer
[3], p
+ 1, 0);
1044 memcpy(unit
->baSourceID
, &buffer
[5], p
);
1046 if (buffer
[5+p
] != 0)
1047 usb_string(udev
, buffer
[5+p
], unit
->name
,
1050 sprintf(unit
->name
, "Selector %u", buffer
[3]);
1052 list_add_tail(&unit
->list
, &dev
->entities
);
1055 case UVC_VC_PROCESSING_UNIT
:
1056 n
= buflen
>= 8 ? buffer
[7] : 0;
1057 p
= dev
->uvc_version
>= 0x0110 ? 10 : 9;
1059 if (buflen
< p
+ n
) {
1060 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
1061 "interface %d PROCESSING_UNIT error\n",
1062 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
1066 unit
= uvc_alloc_entity(buffer
[2], buffer
[3], 2, n
);
1070 memcpy(unit
->baSourceID
, &buffer
[4], 1);
1071 unit
->processing
.wMaxMultiplier
=
1072 get_unaligned_le16(&buffer
[5]);
1073 unit
->processing
.bControlSize
= buffer
[7];
1074 unit
->processing
.bmControls
= (__u8
*)unit
+ sizeof *unit
;
1075 memcpy(unit
->processing
.bmControls
, &buffer
[8], n
);
1076 if (dev
->uvc_version
>= 0x0110)
1077 unit
->processing
.bmVideoStandards
= buffer
[9+n
];
1079 if (buffer
[8+n
] != 0)
1080 usb_string(udev
, buffer
[8+n
], unit
->name
,
1083 sprintf(unit
->name
, "Processing %u", buffer
[3]);
1085 list_add_tail(&unit
->list
, &dev
->entities
);
1088 case UVC_VC_EXTENSION_UNIT
:
1089 p
= buflen
>= 22 ? buffer
[21] : 0;
1090 n
= buflen
>= 24 + p
? buffer
[22+p
] : 0;
1092 if (buflen
< 24 + p
+ n
) {
1093 uvc_trace(UVC_TRACE_DESCR
, "device %d videocontrol "
1094 "interface %d EXTENSION_UNIT error\n",
1095 udev
->devnum
, alts
->desc
.bInterfaceNumber
);
1099 unit
= uvc_alloc_entity(buffer
[2], buffer
[3], p
+ 1, n
);
1103 memcpy(unit
->extension
.guidExtensionCode
, &buffer
[4], 16);
1104 unit
->extension
.bNumControls
= buffer
[20];
1105 memcpy(unit
->baSourceID
, &buffer
[22], p
);
1106 unit
->extension
.bControlSize
= buffer
[22+p
];
1107 unit
->extension
.bmControls
= (__u8
*)unit
+ sizeof *unit
;
1108 memcpy(unit
->extension
.bmControls
, &buffer
[23+p
], n
);
1110 if (buffer
[23+p
+n
] != 0)
1111 usb_string(udev
, buffer
[23+p
+n
], unit
->name
,
1114 sprintf(unit
->name
, "Extension %u", buffer
[3]);
1116 list_add_tail(&unit
->list
, &dev
->entities
);
1120 uvc_trace(UVC_TRACE_DESCR
, "Found an unknown CS_INTERFACE "
1121 "descriptor (%u)\n", buffer
[2]);
1128 static int uvc_parse_control(struct uvc_device
*dev
)
1130 struct usb_host_interface
*alts
= dev
->intf
->cur_altsetting
;
1131 unsigned char *buffer
= alts
->extra
;
1132 int buflen
= alts
->extralen
;
1135 /* Parse the default alternate setting only, as the UVC specification
1136 * defines a single alternate setting, the default alternate setting
1140 while (buflen
> 2) {
1141 if (uvc_parse_vendor_control(dev
, buffer
, buflen
) ||
1142 buffer
[1] != USB_DT_CS_INTERFACE
)
1143 goto next_descriptor
;
1145 if ((ret
= uvc_parse_standard_control(dev
, buffer
, buflen
)) < 0)
1149 buflen
-= buffer
[0];
1150 buffer
+= buffer
[0];
1153 /* Check if the optional status endpoint is present. Built-in iSight
1154 * webcams have an interrupt endpoint but spit proprietary data that
1155 * don't conform to the UVC status endpoint messages. Don't try to
1156 * handle the interrupt endpoint for those cameras.
1158 if (alts
->desc
.bNumEndpoints
== 1 &&
1159 !(dev
->quirks
& UVC_QUIRK_BUILTIN_ISIGHT
)) {
1160 struct usb_host_endpoint
*ep
= &alts
->endpoint
[0];
1161 struct usb_endpoint_descriptor
*desc
= &ep
->desc
;
1163 if (usb_endpoint_is_int_in(desc
) &&
1164 le16_to_cpu(desc
->wMaxPacketSize
) >= 8 &&
1165 desc
->bInterval
!= 0) {
1166 uvc_trace(UVC_TRACE_DESCR
, "Found a Status endpoint "
1167 "(addr %02x).\n", desc
->bEndpointAddress
);
1175 /* ------------------------------------------------------------------------
1180 * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1181 * and containing the following units:
1183 * - one or more Output Terminals (USB Streaming or Display)
1184 * - zero or one Processing Unit
1185 * - zero, one or more single-input Selector Units
1186 * - zero or one multiple-input Selector Units, provided all inputs are
1187 * connected to input terminals
1188 * - zero, one or mode single-input Extension Units
1189 * - one or more Input Terminals (Camera, External or USB Streaming)
1191 * The terminal and units must match on of the following structures:
1193 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
1194 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
1195 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
1197 * +---------+ +---------+ -> OTT_*(0)
1198 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
1199 * +---------+ +---------+ -> OTT_*(n)
1201 * The Processing Unit and Extension Units can be in any order. Additional
1202 * Extension Units connected to the main chain as single-unit branches are
1203 * also supported. Single-input Selector Units are ignored.
1205 static int uvc_scan_chain_entity(struct uvc_video_chain
*chain
,
1206 struct uvc_entity
*entity
)
1208 switch (UVC_ENTITY_TYPE(entity
)) {
1209 case UVC_VC_EXTENSION_UNIT
:
1210 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1211 printk(" <- XU %d", entity
->id
);
1213 if (entity
->bNrInPins
!= 1) {
1214 uvc_trace(UVC_TRACE_DESCR
, "Extension unit %d has more "
1215 "than 1 input pin.\n", entity
->id
);
1221 case UVC_VC_PROCESSING_UNIT
:
1222 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1223 printk(" <- PU %d", entity
->id
);
1225 if (chain
->processing
!= NULL
) {
1226 uvc_trace(UVC_TRACE_DESCR
, "Found multiple "
1227 "Processing Units in chain.\n");
1231 chain
->processing
= entity
;
1234 case UVC_VC_SELECTOR_UNIT
:
1235 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1236 printk(" <- SU %d", entity
->id
);
1238 /* Single-input selector units are ignored. */
1239 if (entity
->bNrInPins
== 1)
1242 if (chain
->selector
!= NULL
) {
1243 uvc_trace(UVC_TRACE_DESCR
, "Found multiple Selector "
1244 "Units in chain.\n");
1248 chain
->selector
= entity
;
1251 case UVC_ITT_VENDOR_SPECIFIC
:
1252 case UVC_ITT_CAMERA
:
1253 case UVC_ITT_MEDIA_TRANSPORT_INPUT
:
1254 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1255 printk(" <- IT %d\n", entity
->id
);
1259 case UVC_TT_STREAMING
:
1260 if (UVC_ENTITY_IS_ITERM(entity
)) {
1261 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1262 printk(" <- IT %d\n", entity
->id
);
1264 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1265 printk(" OT %d", entity
->id
);
1271 uvc_trace(UVC_TRACE_DESCR
, "Unsupported entity type "
1272 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity
));
1276 list_add_tail(&entity
->chain
, &chain
->entities
);
1280 static int uvc_scan_chain_forward(struct uvc_video_chain
*chain
,
1281 struct uvc_entity
*entity
, struct uvc_entity
*prev
)
1283 struct uvc_entity
*forward
;
1291 forward
= uvc_entity_by_reference(chain
->dev
, entity
->id
,
1293 if (forward
== NULL
)
1295 if (forward
== prev
)
1298 switch (UVC_ENTITY_TYPE(forward
)) {
1299 case UVC_VC_EXTENSION_UNIT
:
1300 if (forward
->bNrInPins
!= 1) {
1301 uvc_trace(UVC_TRACE_DESCR
, "Extension unit %d "
1302 "has more than 1 input pin.\n",
1307 list_add_tail(&forward
->chain
, &chain
->entities
);
1308 if (uvc_trace_param
& UVC_TRACE_PROBE
) {
1312 printk(" XU %d", forward
->id
);
1317 case UVC_OTT_VENDOR_SPECIFIC
:
1318 case UVC_OTT_DISPLAY
:
1319 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT
:
1320 case UVC_TT_STREAMING
:
1321 if (UVC_ENTITY_IS_ITERM(forward
)) {
1322 uvc_trace(UVC_TRACE_DESCR
, "Unsupported input "
1323 "terminal %u.\n", forward
->id
);
1327 list_add_tail(&forward
->chain
, &chain
->entities
);
1328 if (uvc_trace_param
& UVC_TRACE_PROBE
) {
1332 printk(" OT %d", forward
->id
);
1344 static int uvc_scan_chain_backward(struct uvc_video_chain
*chain
,
1345 struct uvc_entity
**_entity
)
1347 struct uvc_entity
*entity
= *_entity
;
1348 struct uvc_entity
*term
;
1349 int id
= -EINVAL
, i
;
1351 switch (UVC_ENTITY_TYPE(entity
)) {
1352 case UVC_VC_EXTENSION_UNIT
:
1353 case UVC_VC_PROCESSING_UNIT
:
1354 id
= entity
->baSourceID
[0];
1357 case UVC_VC_SELECTOR_UNIT
:
1358 /* Single-input selector units are ignored. */
1359 if (entity
->bNrInPins
== 1) {
1360 id
= entity
->baSourceID
[0];
1364 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1367 chain
->selector
= entity
;
1368 for (i
= 0; i
< entity
->bNrInPins
; ++i
) {
1369 id
= entity
->baSourceID
[i
];
1370 term
= uvc_entity_by_id(chain
->dev
, id
);
1371 if (term
== NULL
|| !UVC_ENTITY_IS_ITERM(term
)) {
1372 uvc_trace(UVC_TRACE_DESCR
, "Selector unit %d "
1373 "input %d isn't connected to an "
1374 "input terminal\n", entity
->id
, i
);
1378 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1379 printk(" %d", term
->id
);
1381 list_add_tail(&term
->chain
, &chain
->entities
);
1382 uvc_scan_chain_forward(chain
, term
, entity
);
1385 if (uvc_trace_param
& UVC_TRACE_PROBE
)
1391 case UVC_ITT_VENDOR_SPECIFIC
:
1392 case UVC_ITT_CAMERA
:
1393 case UVC_ITT_MEDIA_TRANSPORT_INPUT
:
1394 case UVC_OTT_VENDOR_SPECIFIC
:
1395 case UVC_OTT_DISPLAY
:
1396 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT
:
1397 case UVC_TT_STREAMING
:
1398 id
= UVC_ENTITY_IS_OTERM(entity
) ? entity
->baSourceID
[0] : 0;
1407 entity
= uvc_entity_by_id(chain
->dev
, id
);
1408 if (entity
== NULL
) {
1409 uvc_trace(UVC_TRACE_DESCR
, "Found reference to "
1410 "unknown entity %d.\n", id
);
1418 static int uvc_scan_chain(struct uvc_video_chain
*chain
,
1419 struct uvc_entity
*term
)
1421 struct uvc_entity
*entity
, *prev
;
1423 uvc_trace(UVC_TRACE_PROBE
, "Scanning UVC chain:");
1428 while (entity
!= NULL
) {
1429 /* Entity must not be part of an existing chain */
1430 if (entity
->chain
.next
|| entity
->chain
.prev
) {
1431 uvc_trace(UVC_TRACE_DESCR
, "Found reference to "
1432 "entity %d already in chain.\n", entity
->id
);
1436 /* Process entity */
1437 if (uvc_scan_chain_entity(chain
, entity
) < 0)
1441 if (uvc_scan_chain_forward(chain
, entity
, prev
) < 0)
1446 if (uvc_scan_chain_backward(chain
, &entity
) < 0)
1453 static unsigned int uvc_print_terms(struct list_head
*terms
, u16 dir
,
1456 struct uvc_entity
*term
;
1457 unsigned int nterms
= 0;
1460 list_for_each_entry(term
, terms
, chain
) {
1461 if (!UVC_ENTITY_IS_TERM(term
) ||
1462 UVC_TERM_DIRECTION(term
) != dir
)
1466 p
+= sprintf(p
, ",");
1467 if (++nterms
>= 4) {
1468 p
+= sprintf(p
, "...");
1471 p
+= sprintf(p
, "%u", term
->id
);
1477 static const char *uvc_print_chain(struct uvc_video_chain
*chain
)
1479 static char buffer
[43];
1482 p
+= uvc_print_terms(&chain
->entities
, UVC_TERM_INPUT
, p
);
1483 p
+= sprintf(p
, " -> ");
1484 uvc_print_terms(&chain
->entities
, UVC_TERM_OUTPUT
, p
);
1490 * Scan the device for video chains and register video devices.
1492 * Chains are scanned starting at their output terminals and walked backwards.
1494 static int uvc_scan_device(struct uvc_device
*dev
)
1496 struct uvc_video_chain
*chain
;
1497 struct uvc_entity
*term
;
1499 list_for_each_entry(term
, &dev
->entities
, list
) {
1500 if (!UVC_ENTITY_IS_OTERM(term
))
1503 /* If the terminal is already included in a chain, skip it.
1504 * This can happen for chains that have multiple output
1505 * terminals, where all output terminals beside the first one
1506 * will be inserted in the chain in forward scans.
1508 if (term
->chain
.next
|| term
->chain
.prev
)
1511 chain
= kzalloc(sizeof(*chain
), GFP_KERNEL
);
1515 INIT_LIST_HEAD(&chain
->entities
);
1516 mutex_init(&chain
->ctrl_mutex
);
1519 if (uvc_scan_chain(chain
, term
) < 0) {
1524 uvc_trace(UVC_TRACE_PROBE
, "Found a valid video chain (%s).\n",
1525 uvc_print_chain(chain
));
1527 list_add_tail(&chain
->list
, &dev
->chains
);
1530 if (list_empty(&dev
->chains
)) {
1531 uvc_printk(KERN_INFO
, "No valid video chain found.\n");
1538 /* ------------------------------------------------------------------------
1539 * Video device registration and unregistration
1543 * Delete the UVC device.
1545 * Called by the kernel when the last reference to the uvc_device structure
1548 * As this function is called after or during disconnect(), all URBs have
1549 * already been canceled by the USB core. There is no need to kill the
1550 * interrupt URB manually.
1552 static void uvc_delete(struct uvc_device
*dev
)
1554 struct list_head
*p
, *n
;
1556 usb_put_intf(dev
->intf
);
1557 usb_put_dev(dev
->udev
);
1559 uvc_status_cleanup(dev
);
1560 uvc_ctrl_cleanup_device(dev
);
1562 list_for_each_safe(p
, n
, &dev
->chains
) {
1563 struct uvc_video_chain
*chain
;
1564 chain
= list_entry(p
, struct uvc_video_chain
, list
);
1568 list_for_each_safe(p
, n
, &dev
->entities
) {
1569 struct uvc_entity
*entity
;
1570 entity
= list_entry(p
, struct uvc_entity
, list
);
1574 list_for_each_safe(p
, n
, &dev
->streams
) {
1575 struct uvc_streaming
*streaming
;
1576 streaming
= list_entry(p
, struct uvc_streaming
, list
);
1577 usb_driver_release_interface(&uvc_driver
.driver
,
1579 usb_put_intf(streaming
->intf
);
1580 kfree(streaming
->format
);
1581 kfree(streaming
->header
.bmaControls
);
1588 static void uvc_release(struct video_device
*vdev
)
1590 struct uvc_streaming
*stream
= video_get_drvdata(vdev
);
1591 struct uvc_device
*dev
= stream
->dev
;
1593 video_device_release(vdev
);
1595 /* Decrement the registered streams count and delete the device when it
1598 if (atomic_dec_and_test(&dev
->nstreams
))
1603 * Unregister the video devices.
1605 static void uvc_unregister_video(struct uvc_device
*dev
)
1607 struct uvc_streaming
*stream
;
1609 /* Unregistering all video devices might result in uvc_delete() being
1610 * called from inside the loop if there's no open file handle. To avoid
1611 * that, increment the stream count before iterating over the streams
1612 * and decrement it when done.
1614 atomic_inc(&dev
->nstreams
);
1616 list_for_each_entry(stream
, &dev
->streams
, list
) {
1617 if (stream
->vdev
== NULL
)
1620 video_unregister_device(stream
->vdev
);
1621 stream
->vdev
= NULL
;
1624 /* Decrement the stream count and call uvc_delete explicitly if there
1625 * are no stream left.
1627 if (atomic_dec_and_test(&dev
->nstreams
))
1631 static int uvc_register_video(struct uvc_device
*dev
,
1632 struct uvc_streaming
*stream
)
1634 struct video_device
*vdev
;
1637 /* Initialize the streaming interface with default streaming
1640 ret
= uvc_video_init(stream
);
1642 uvc_printk(KERN_ERR
, "Failed to initialize the device "
1647 /* Register the device with V4L. */
1648 vdev
= video_device_alloc();
1650 uvc_printk(KERN_ERR
, "Failed to allocate video device (%d).\n",
1655 /* We already hold a reference to dev->udev. The video device will be
1656 * unregistered before the reference is released, so we don't need to
1659 vdev
->parent
= &dev
->intf
->dev
;
1660 vdev
->fops
= &uvc_fops
;
1661 vdev
->release
= uvc_release
;
1662 strlcpy(vdev
->name
, dev
->name
, sizeof vdev
->name
);
1664 /* Set the driver data before calling video_register_device, otherwise
1665 * uvc_v4l2_open might race us.
1667 stream
->vdev
= vdev
;
1668 video_set_drvdata(vdev
, stream
);
1670 ret
= video_register_device(vdev
, VFL_TYPE_GRABBER
, -1);
1672 uvc_printk(KERN_ERR
, "Failed to register video device (%d).\n",
1674 stream
->vdev
= NULL
;
1675 video_device_release(vdev
);
1679 atomic_inc(&dev
->nstreams
);
1684 * Register all video devices in all chains.
1686 static int uvc_register_terms(struct uvc_device
*dev
,
1687 struct uvc_video_chain
*chain
)
1689 struct uvc_streaming
*stream
;
1690 struct uvc_entity
*term
;
1693 list_for_each_entry(term
, &chain
->entities
, chain
) {
1694 if (UVC_ENTITY_TYPE(term
) != UVC_TT_STREAMING
)
1697 stream
= uvc_stream_by_id(dev
, term
->id
);
1698 if (stream
== NULL
) {
1699 uvc_printk(KERN_INFO
, "No streaming interface found "
1700 "for terminal %u.", term
->id
);
1704 stream
->chain
= chain
;
1705 ret
= uvc_register_video(dev
, stream
);
1713 static int uvc_register_chains(struct uvc_device
*dev
)
1715 struct uvc_video_chain
*chain
;
1718 list_for_each_entry(chain
, &dev
->chains
, list
) {
1719 ret
= uvc_register_terms(dev
, chain
);
1727 /* ------------------------------------------------------------------------
1728 * USB probe, disconnect, suspend and resume
1731 static int uvc_probe(struct usb_interface
*intf
,
1732 const struct usb_device_id
*id
)
1734 struct usb_device
*udev
= interface_to_usbdev(intf
);
1735 struct uvc_device
*dev
;
1738 if (id
->idVendor
&& id
->idProduct
)
1739 uvc_trace(UVC_TRACE_PROBE
, "Probing known UVC device %s "
1740 "(%04x:%04x)\n", udev
->devpath
, id
->idVendor
,
1743 uvc_trace(UVC_TRACE_PROBE
, "Probing generic UVC device %s\n",
1746 /* Allocate memory for the device and initialize it. */
1747 if ((dev
= kzalloc(sizeof *dev
, GFP_KERNEL
)) == NULL
)
1750 INIT_LIST_HEAD(&dev
->entities
);
1751 INIT_LIST_HEAD(&dev
->chains
);
1752 INIT_LIST_HEAD(&dev
->streams
);
1753 atomic_set(&dev
->nstreams
, 0);
1754 atomic_set(&dev
->users
, 0);
1756 dev
->udev
= usb_get_dev(udev
);
1757 dev
->intf
= usb_get_intf(intf
);
1758 dev
->intfnum
= intf
->cur_altsetting
->desc
.bInterfaceNumber
;
1759 dev
->quirks
= (uvc_quirks_param
== -1)
1760 ? id
->driver_info
: uvc_quirks_param
;
1762 if (udev
->product
!= NULL
)
1763 strlcpy(dev
->name
, udev
->product
, sizeof dev
->name
);
1765 snprintf(dev
->name
, sizeof dev
->name
,
1766 "UVC Camera (%04x:%04x)",
1767 le16_to_cpu(udev
->descriptor
.idVendor
),
1768 le16_to_cpu(udev
->descriptor
.idProduct
));
1770 /* Parse the Video Class control descriptor. */
1771 if (uvc_parse_control(dev
) < 0) {
1772 uvc_trace(UVC_TRACE_PROBE
, "Unable to parse UVC "
1777 uvc_printk(KERN_INFO
, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1778 dev
->uvc_version
>> 8, dev
->uvc_version
& 0xff,
1779 udev
->product
? udev
->product
: "<unnamed>",
1780 le16_to_cpu(udev
->descriptor
.idVendor
),
1781 le16_to_cpu(udev
->descriptor
.idProduct
));
1783 if (dev
->quirks
!= id
->driver_info
) {
1784 uvc_printk(KERN_INFO
, "Forcing device quirks to 0x%x by module "
1785 "parameter for testing purpose.\n", dev
->quirks
);
1786 uvc_printk(KERN_INFO
, "Please report required quirks to the "
1787 "linux-uvc-devel mailing list.\n");
1790 /* Initialize controls. */
1791 if (uvc_ctrl_init_device(dev
) < 0)
1794 /* Scan the device for video chains. */
1795 if (uvc_scan_device(dev
) < 0)
1798 /* Register video devices. */
1799 if (uvc_register_chains(dev
) < 0)
1802 /* Save our data pointer in the interface data. */
1803 usb_set_intfdata(intf
, dev
);
1805 /* Initialize the interrupt URB. */
1806 if ((ret
= uvc_status_init(dev
)) < 0) {
1807 uvc_printk(KERN_INFO
, "Unable to initialize the status "
1808 "endpoint (%d), status interrupt will not be "
1809 "supported.\n", ret
);
1812 uvc_trace(UVC_TRACE_PROBE
, "UVC device initialized.\n");
1816 uvc_unregister_video(dev
);
1820 static void uvc_disconnect(struct usb_interface
*intf
)
1822 struct uvc_device
*dev
= usb_get_intfdata(intf
);
1824 /* Set the USB interface data to NULL. This can be done outside the
1825 * lock, as there's no other reader.
1827 usb_set_intfdata(intf
, NULL
);
1829 if (intf
->cur_altsetting
->desc
.bInterfaceSubClass
==
1830 UVC_SC_VIDEOSTREAMING
)
1833 dev
->state
|= UVC_DEV_DISCONNECTED
;
1835 uvc_unregister_video(dev
);
1838 static int uvc_suspend(struct usb_interface
*intf
, pm_message_t message
)
1840 struct uvc_device
*dev
= usb_get_intfdata(intf
);
1841 struct uvc_streaming
*stream
;
1843 uvc_trace(UVC_TRACE_SUSPEND
, "Suspending interface %u\n",
1844 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
1846 /* Controls are cached on the fly so they don't need to be saved. */
1847 if (intf
->cur_altsetting
->desc
.bInterfaceSubClass
==
1848 UVC_SC_VIDEOCONTROL
)
1849 return uvc_status_suspend(dev
);
1851 list_for_each_entry(stream
, &dev
->streams
, list
) {
1852 if (stream
->intf
== intf
)
1853 return uvc_video_suspend(stream
);
1856 uvc_trace(UVC_TRACE_SUSPEND
, "Suspend: video streaming USB interface "
1861 static int __uvc_resume(struct usb_interface
*intf
, int reset
)
1863 struct uvc_device
*dev
= usb_get_intfdata(intf
);
1864 struct uvc_streaming
*stream
;
1866 uvc_trace(UVC_TRACE_SUSPEND
, "Resuming interface %u\n",
1867 intf
->cur_altsetting
->desc
.bInterfaceNumber
);
1869 if (intf
->cur_altsetting
->desc
.bInterfaceSubClass
==
1870 UVC_SC_VIDEOCONTROL
) {
1872 int ret
= uvc_ctrl_resume_device(dev
);
1878 return uvc_status_resume(dev
);
1881 list_for_each_entry(stream
, &dev
->streams
, list
) {
1882 if (stream
->intf
== intf
)
1883 return uvc_video_resume(stream
);
1886 uvc_trace(UVC_TRACE_SUSPEND
, "Resume: video streaming USB interface "
1891 static int uvc_resume(struct usb_interface
*intf
)
1893 return __uvc_resume(intf
, 0);
1896 static int uvc_reset_resume(struct usb_interface
*intf
)
1898 return __uvc_resume(intf
, 1);
1901 /* ------------------------------------------------------------------------
1905 static int uvc_clock_param_get(char *buffer
, struct kernel_param
*kp
)
1907 if (uvc_clock_param
== CLOCK_MONOTONIC
)
1908 return sprintf(buffer
, "CLOCK_MONOTONIC");
1910 return sprintf(buffer
, "CLOCK_REALTIME");
1913 static int uvc_clock_param_set(const char *val
, struct kernel_param
*kp
)
1915 if (strncasecmp(val
, "clock_", strlen("clock_")) == 0)
1916 val
+= strlen("clock_");
1918 if (strcasecmp(val
, "monotonic") == 0)
1919 uvc_clock_param
= CLOCK_MONOTONIC
;
1920 else if (strcasecmp(val
, "realtime") == 0)
1921 uvc_clock_param
= CLOCK_REALTIME
;
1928 module_param_call(clock
, uvc_clock_param_set
, uvc_clock_param_get
,
1929 &uvc_clock_param
, S_IRUGO
|S_IWUSR
);
1930 MODULE_PARM_DESC(clock
, "Video buffers timestamp clock");
1931 module_param_named(nodrop
, uvc_no_drop_param
, uint
, S_IRUGO
|S_IWUSR
);
1932 MODULE_PARM_DESC(nodrop
, "Don't drop incomplete frames");
1933 module_param_named(quirks
, uvc_quirks_param
, uint
, S_IRUGO
|S_IWUSR
);
1934 MODULE_PARM_DESC(quirks
, "Forced device quirks");
1935 module_param_named(trace
, uvc_trace_param
, uint
, S_IRUGO
|S_IWUSR
);
1936 MODULE_PARM_DESC(trace
, "Trace level bitmask");
1937 module_param_named(timeout
, uvc_timeout_param
, uint
, S_IRUGO
|S_IWUSR
);
1938 MODULE_PARM_DESC(timeout
, "Streaming control requests timeout");
1940 /* ------------------------------------------------------------------------
1941 * Driver initialization and cleanup
1945 * The Logitech cameras listed below have their interface class set to
1946 * VENDOR_SPEC because they don't announce themselves as UVC devices, even
1947 * though they are compliant.
1949 static struct usb_device_id uvc_ids
[] = {
1950 /* Genius eFace 2025 */
1951 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
1952 | USB_DEVICE_ID_MATCH_INT_INFO
,
1954 .idProduct
= 0x706e,
1955 .bInterfaceClass
= USB_CLASS_VIDEO
,
1956 .bInterfaceSubClass
= 1,
1957 .bInterfaceProtocol
= 0,
1958 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
1959 /* Microsoft Lifecam NX-6000 */
1960 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
1961 | USB_DEVICE_ID_MATCH_INT_INFO
,
1963 .idProduct
= 0x00f8,
1964 .bInterfaceClass
= USB_CLASS_VIDEO
,
1965 .bInterfaceSubClass
= 1,
1966 .bInterfaceProtocol
= 0,
1967 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
1968 /* Microsoft Lifecam VX-7000 */
1969 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
1970 | USB_DEVICE_ID_MATCH_INT_INFO
,
1972 .idProduct
= 0x0723,
1973 .bInterfaceClass
= USB_CLASS_VIDEO
,
1974 .bInterfaceSubClass
= 1,
1975 .bInterfaceProtocol
= 0,
1976 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
1977 /* Logitech Quickcam Fusion */
1978 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
1979 | USB_DEVICE_ID_MATCH_INT_INFO
,
1981 .idProduct
= 0x08c1,
1982 .bInterfaceClass
= USB_CLASS_VENDOR_SPEC
,
1983 .bInterfaceSubClass
= 1,
1984 .bInterfaceProtocol
= 0 },
1985 /* Logitech Quickcam Orbit MP */
1986 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
1987 | USB_DEVICE_ID_MATCH_INT_INFO
,
1989 .idProduct
= 0x08c2,
1990 .bInterfaceClass
= USB_CLASS_VENDOR_SPEC
,
1991 .bInterfaceSubClass
= 1,
1992 .bInterfaceProtocol
= 0 },
1993 /* Logitech Quickcam Pro for Notebook */
1994 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
1995 | USB_DEVICE_ID_MATCH_INT_INFO
,
1997 .idProduct
= 0x08c3,
1998 .bInterfaceClass
= USB_CLASS_VENDOR_SPEC
,
1999 .bInterfaceSubClass
= 1,
2000 .bInterfaceProtocol
= 0 },
2001 /* Logitech Quickcam Pro 5000 */
2002 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2003 | USB_DEVICE_ID_MATCH_INT_INFO
,
2005 .idProduct
= 0x08c5,
2006 .bInterfaceClass
= USB_CLASS_VENDOR_SPEC
,
2007 .bInterfaceSubClass
= 1,
2008 .bInterfaceProtocol
= 0 },
2009 /* Logitech Quickcam OEM Dell Notebook */
2010 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2011 | USB_DEVICE_ID_MATCH_INT_INFO
,
2013 .idProduct
= 0x08c6,
2014 .bInterfaceClass
= USB_CLASS_VENDOR_SPEC
,
2015 .bInterfaceSubClass
= 1,
2016 .bInterfaceProtocol
= 0 },
2017 /* Logitech Quickcam OEM Cisco VT Camera II */
2018 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2019 | USB_DEVICE_ID_MATCH_INT_INFO
,
2021 .idProduct
= 0x08c7,
2022 .bInterfaceClass
= USB_CLASS_VENDOR_SPEC
,
2023 .bInterfaceSubClass
= 1,
2024 .bInterfaceProtocol
= 0 },
2025 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2026 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2027 | USB_DEVICE_ID_MATCH_INT_INFO
,
2029 .idProduct
= 0x3820,
2030 .bInterfaceClass
= USB_CLASS_VIDEO
,
2031 .bInterfaceSubClass
= 1,
2032 .bInterfaceProtocol
= 0,
2033 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
2034 /* Apple Built-In iSight */
2035 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2036 | USB_DEVICE_ID_MATCH_INT_INFO
,
2038 .idProduct
= 0x8501,
2039 .bInterfaceClass
= USB_CLASS_VIDEO
,
2040 .bInterfaceSubClass
= 1,
2041 .bInterfaceProtocol
= 0,
2042 .driver_info
= UVC_QUIRK_PROBE_MINMAX
2043 | UVC_QUIRK_BUILTIN_ISIGHT
},
2044 /* Genesys Logic USB 2.0 PC Camera */
2045 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2046 | USB_DEVICE_ID_MATCH_INT_INFO
,
2048 .idProduct
= 0x0505,
2049 .bInterfaceClass
= USB_CLASS_VIDEO
,
2050 .bInterfaceSubClass
= 1,
2051 .bInterfaceProtocol
= 0,
2052 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2054 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2055 | USB_DEVICE_ID_MATCH_INT_INFO
,
2057 .idProduct
= 0x332d,
2058 .bInterfaceClass
= USB_CLASS_VIDEO
,
2059 .bInterfaceSubClass
= 1,
2060 .bInterfaceProtocol
= 0,
2061 .driver_info
= UVC_QUIRK_FIX_BANDWIDTH
},
2062 /* ViMicro - Minoru3D */
2063 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2064 | USB_DEVICE_ID_MATCH_INT_INFO
,
2066 .idProduct
= 0x3410,
2067 .bInterfaceClass
= USB_CLASS_VIDEO
,
2068 .bInterfaceSubClass
= 1,
2069 .bInterfaceProtocol
= 0,
2070 .driver_info
= UVC_QUIRK_FIX_BANDWIDTH
},
2071 /* ViMicro Venus - Minoru3D */
2072 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2073 | USB_DEVICE_ID_MATCH_INT_INFO
,
2075 .idProduct
= 0x3420,
2076 .bInterfaceClass
= USB_CLASS_VIDEO
,
2077 .bInterfaceSubClass
= 1,
2078 .bInterfaceProtocol
= 0,
2079 .driver_info
= UVC_QUIRK_FIX_BANDWIDTH
},
2081 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2082 | USB_DEVICE_ID_MATCH_INT_INFO
,
2084 .idProduct
= 0x0004,
2085 .bInterfaceClass
= USB_CLASS_VIDEO
,
2086 .bInterfaceSubClass
= 1,
2087 .bInterfaceProtocol
= 0,
2088 .driver_info
= UVC_QUIRK_PROBE_MINMAX
2089 | UVC_QUIRK_PROBE_DEF
},
2090 /* Syntek (HP Spartan) */
2091 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2092 | USB_DEVICE_ID_MATCH_INT_INFO
,
2094 .idProduct
= 0x5212,
2095 .bInterfaceClass
= USB_CLASS_VIDEO
,
2096 .bInterfaceSubClass
= 1,
2097 .bInterfaceProtocol
= 0,
2098 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2099 /* Syntek (Samsung Q310) */
2100 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2101 | USB_DEVICE_ID_MATCH_INT_INFO
,
2103 .idProduct
= 0x5931,
2104 .bInterfaceClass
= USB_CLASS_VIDEO
,
2105 .bInterfaceSubClass
= 1,
2106 .bInterfaceProtocol
= 0,
2107 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2108 /* Syntek (Asus F9SG) */
2109 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2110 | USB_DEVICE_ID_MATCH_INT_INFO
,
2112 .idProduct
= 0x8a31,
2113 .bInterfaceClass
= USB_CLASS_VIDEO
,
2114 .bInterfaceSubClass
= 1,
2115 .bInterfaceProtocol
= 0,
2116 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2117 /* Syntek (Asus U3S) */
2118 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2119 | USB_DEVICE_ID_MATCH_INT_INFO
,
2121 .idProduct
= 0x8a33,
2122 .bInterfaceClass
= USB_CLASS_VIDEO
,
2123 .bInterfaceSubClass
= 1,
2124 .bInterfaceProtocol
= 0,
2125 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2126 /* Syntek (JAOtech Smart Terminal) */
2127 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2128 | USB_DEVICE_ID_MATCH_INT_INFO
,
2130 .idProduct
= 0x8a34,
2131 .bInterfaceClass
= USB_CLASS_VIDEO
,
2132 .bInterfaceSubClass
= 1,
2133 .bInterfaceProtocol
= 0,
2134 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2135 /* Lenovo Thinkpad SL400/SL500 */
2136 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2137 | USB_DEVICE_ID_MATCH_INT_INFO
,
2139 .idProduct
= 0x480b,
2140 .bInterfaceClass
= USB_CLASS_VIDEO
,
2141 .bInterfaceSubClass
= 1,
2142 .bInterfaceProtocol
= 0,
2143 .driver_info
= UVC_QUIRK_STREAM_NO_FID
},
2144 /* Aveo Technology USB 2.0 Camera */
2145 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2146 | USB_DEVICE_ID_MATCH_INT_INFO
,
2148 .idProduct
= 0x0306,
2149 .bInterfaceClass
= USB_CLASS_VIDEO
,
2150 .bInterfaceSubClass
= 1,
2151 .bInterfaceProtocol
= 0,
2152 .driver_info
= UVC_QUIRK_PROBE_MINMAX
2153 | UVC_QUIRK_PROBE_EXTRAFIELDS
},
2154 /* Ecamm Pico iMage */
2155 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2156 | USB_DEVICE_ID_MATCH_INT_INFO
,
2158 .idProduct
= 0xcafe,
2159 .bInterfaceClass
= USB_CLASS_VIDEO
,
2160 .bInterfaceSubClass
= 1,
2161 .bInterfaceProtocol
= 0,
2162 .driver_info
= UVC_QUIRK_PROBE_EXTRAFIELDS
},
2163 /* FSC WebCam V30S */
2164 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2165 | USB_DEVICE_ID_MATCH_INT_INFO
,
2167 .idProduct
= 0x3288,
2168 .bInterfaceClass
= USB_CLASS_VIDEO
,
2169 .bInterfaceSubClass
= 1,
2170 .bInterfaceProtocol
= 0,
2171 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
2172 /* Bodelin ProScopeHR */
2173 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2174 | USB_DEVICE_ID_MATCH_DEV_HI
2175 | USB_DEVICE_ID_MATCH_INT_INFO
,
2177 .idProduct
= 0x1000,
2178 .bcdDevice_hi
= 0x0126,
2179 .bInterfaceClass
= USB_CLASS_VIDEO
,
2180 .bInterfaceSubClass
= 1,
2181 .bInterfaceProtocol
= 0,
2182 .driver_info
= UVC_QUIRK_STATUS_INTERVAL
},
2183 /* MSI StarCam 370i */
2184 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2185 | USB_DEVICE_ID_MATCH_INT_INFO
,
2187 .idProduct
= 0x2951,
2188 .bInterfaceClass
= USB_CLASS_VIDEO
,
2189 .bInterfaceSubClass
= 1,
2190 .bInterfaceProtocol
= 0,
2191 .driver_info
= UVC_QUIRK_PROBE_MINMAX
},
2192 /* SiGma Micro USB Web Camera */
2193 { .match_flags
= USB_DEVICE_ID_MATCH_DEVICE
2194 | USB_DEVICE_ID_MATCH_INT_INFO
,
2196 .idProduct
= 0x3000,
2197 .bInterfaceClass
= USB_CLASS_VIDEO
,
2198 .bInterfaceSubClass
= 1,
2199 .bInterfaceProtocol
= 0,
2200 .driver_info
= UVC_QUIRK_PROBE_MINMAX
2201 | UVC_QUIRK_IGNORE_SELECTOR_UNIT
},
2202 /* Generic USB Video Class */
2203 { USB_INTERFACE_INFO(USB_CLASS_VIDEO
, 1, 0) },
2207 MODULE_DEVICE_TABLE(usb
, uvc_ids
);
2209 struct uvc_driver uvc_driver
= {
2213 .disconnect
= uvc_disconnect
,
2214 .suspend
= uvc_suspend
,
2215 .resume
= uvc_resume
,
2216 .reset_resume
= uvc_reset_resume
,
2217 .id_table
= uvc_ids
,
2218 .supports_autosuspend
= 1,
2222 static int __init
uvc_init(void)
2226 INIT_LIST_HEAD(&uvc_driver
.devices
);
2227 INIT_LIST_HEAD(&uvc_driver
.controls
);
2228 mutex_init(&uvc_driver
.ctrl_mutex
);
2232 result
= usb_register(&uvc_driver
.driver
);
2234 printk(KERN_INFO DRIVER_DESC
" (" DRIVER_VERSION
")\n");
2238 static void __exit
uvc_cleanup(void)
2240 usb_deregister(&uvc_driver
.driver
);
2243 module_init(uvc_init
);
2244 module_exit(uvc_cleanup
);
2246 MODULE_AUTHOR(DRIVER_AUTHOR
);
2247 MODULE_DESCRIPTION(DRIVER_DESC
);
2248 MODULE_LICENSE("GPL");
2249 MODULE_VERSION(DRIVER_VERSION
);