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088ead2552
linux/drivers/media/usb/uvc/uvc_driver.c
Guennadi Liakhovetski 088ead2552 media: uvcvideo: Add a metadata device node 
Some UVC video cameras contain metadata in their payload headers. This
patch extracts that data, adding more clock synchronisation information,
on both bulk and isochronous endpoints and makes it available to the user
space on a separate video node, using the V4L2_CAP_META_CAPTURE capability
and the V4L2_BUF_TYPE_META_CAPTURE buffer queue type. By default, only the
V4L2_META_FMT_UVC pixel format is available from those nodes. However,
cameras can be added to the device ID table to additionally specify their
own metadata format, in which case that format will also become available
from the metadata node.

[Use put_unaligned instead of __put_unaligned_cpu64]
[Use put_unaligned for the sof field as well]

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2018-01-04 06:41:47 -05:00

2864 lines
77 KiB
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/*
* uvc_driver.c -- USB Video Class driver
*
* Copyright (C) 2005-2010
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <linux/vmalloc.h>
#include <linux/wait.h>
#include <linux/version.h>
#include <asm/unaligned.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include "uvcvideo.h"
#define DRIVER_AUTHOR "Laurent Pinchart " \
"<laurent.pinchart@ideasonboard.com>"
#define DRIVER_DESC "USB Video Class driver"
unsigned int uvc_clock_param = CLOCK_MONOTONIC;
unsigned int uvc_hw_timestamps_param;
unsigned int uvc_no_drop_param;
static unsigned int uvc_quirks_param = -1;
unsigned int uvc_trace_param;
unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
/* ------------------------------------------------------------------------
* Video formats
*/
static struct uvc_format_desc uvc_fmts[] = {
{
.name = "YUV 4:2:2 (YUYV)",
.guid = UVC_GUID_FORMAT_YUY2,
.fcc = V4L2_PIX_FMT_YUYV,
},
{
.name = "YUV 4:2:2 (YUYV)",
.guid = UVC_GUID_FORMAT_YUY2_ISIGHT,
.fcc = V4L2_PIX_FMT_YUYV,
},
{
.name = "YUV 4:2:0 (NV12)",
.guid = UVC_GUID_FORMAT_NV12,
.fcc = V4L2_PIX_FMT_NV12,
},
{
.name = "MJPEG",
.guid = UVC_GUID_FORMAT_MJPEG,
.fcc = V4L2_PIX_FMT_MJPEG,
},
{
.name = "YVU 4:2:0 (YV12)",
.guid = UVC_GUID_FORMAT_YV12,
.fcc = V4L2_PIX_FMT_YVU420,
},
{
.name = "YUV 4:2:0 (I420)",
.guid = UVC_GUID_FORMAT_I420,
.fcc = V4L2_PIX_FMT_YUV420,
},
{
.name = "YUV 4:2:0 (M420)",
.guid = UVC_GUID_FORMAT_M420,
.fcc = V4L2_PIX_FMT_M420,
},
{
.name = "YUV 4:2:2 (UYVY)",
.guid = UVC_GUID_FORMAT_UYVY,
.fcc = V4L2_PIX_FMT_UYVY,
},
{
.name = "Greyscale 8-bit (Y800)",
.guid = UVC_GUID_FORMAT_Y800,
.fcc = V4L2_PIX_FMT_GREY,
},
{
.name = "Greyscale 8-bit (Y8 )",
.guid = UVC_GUID_FORMAT_Y8,
.fcc = V4L2_PIX_FMT_GREY,
},
{
.name = "Greyscale 8-bit (D3DFMT_L8)",
.guid = UVC_GUID_FORMAT_D3DFMT_L8,
.fcc = V4L2_PIX_FMT_GREY,
},
{
.name = "Greyscale 10-bit (Y10 )",
.guid = UVC_GUID_FORMAT_Y10,
.fcc = V4L2_PIX_FMT_Y10,
},
{
.name = "Greyscale 12-bit (Y12 )",
.guid = UVC_GUID_FORMAT_Y12,
.fcc = V4L2_PIX_FMT_Y12,
},
{
.name = "Greyscale 16-bit (Y16 )",
.guid = UVC_GUID_FORMAT_Y16,
.fcc = V4L2_PIX_FMT_Y16,
},
{
.name = "BGGR Bayer (BY8 )",
.guid = UVC_GUID_FORMAT_BY8,
.fcc = V4L2_PIX_FMT_SBGGR8,
},
{
.name = "BGGR Bayer (BA81)",
.guid = UVC_GUID_FORMAT_BA81,
.fcc = V4L2_PIX_FMT_SBGGR8,
},
{
.name = "GBRG Bayer (GBRG)",
.guid = UVC_GUID_FORMAT_GBRG,
.fcc = V4L2_PIX_FMT_SGBRG8,
},
{
.name = "GRBG Bayer (GRBG)",
.guid = UVC_GUID_FORMAT_GRBG,
.fcc = V4L2_PIX_FMT_SGRBG8,
},
{
.name = "RGGB Bayer (RGGB)",
.guid = UVC_GUID_FORMAT_RGGB,
.fcc = V4L2_PIX_FMT_SRGGB8,
},
{
.name = "RGB565",
.guid = UVC_GUID_FORMAT_RGBP,
.fcc = V4L2_PIX_FMT_RGB565,
},
{
.name = "BGR 8:8:8 (BGR3)",
.guid = UVC_GUID_FORMAT_BGR3,
.fcc = V4L2_PIX_FMT_BGR24,
},
{
.name = "H.264",
.guid = UVC_GUID_FORMAT_H264,
.fcc = V4L2_PIX_FMT_H264,
},
{
.name = "Greyscale 8 L/R (Y8I)",
.guid = UVC_GUID_FORMAT_Y8I,
.fcc = V4L2_PIX_FMT_Y8I,
},
{
.name = "Greyscale 12 L/R (Y12I)",
.guid = UVC_GUID_FORMAT_Y12I,
.fcc = V4L2_PIX_FMT_Y12I,
},
{
.name = "Depth data 16-bit (Z16)",
.guid = UVC_GUID_FORMAT_Z16,
.fcc = V4L2_PIX_FMT_Z16,
},
{
.name = "Bayer 10-bit (SRGGB10P)",
.guid = UVC_GUID_FORMAT_RW10,
.fcc = V4L2_PIX_FMT_SRGGB10P,
},
{
.name = "Bayer 16-bit (SBGGR16)",
.guid = UVC_GUID_FORMAT_BG16,
.fcc = V4L2_PIX_FMT_SBGGR16,
},
{
.name = "Bayer 16-bit (SGBRG16)",
.guid = UVC_GUID_FORMAT_GB16,
.fcc = V4L2_PIX_FMT_SGBRG16,
},
{
.name = "Bayer 16-bit (SRGGB16)",
.guid = UVC_GUID_FORMAT_RG16,
.fcc = V4L2_PIX_FMT_SRGGB16,
},
{
.name = "Bayer 16-bit (SGRBG16)",
.guid = UVC_GUID_FORMAT_GR16,
.fcc = V4L2_PIX_FMT_SGRBG16,
},
{
.name = "Depth data 16-bit (Z16)",
.guid = UVC_GUID_FORMAT_INVZ,
.fcc = V4L2_PIX_FMT_Z16,
},
{
.name = "Greyscale 10-bit (Y10 )",
.guid = UVC_GUID_FORMAT_INVI,
.fcc = V4L2_PIX_FMT_Y10,
},
{
.name = "IR:Depth 26-bit (INZI)",
.guid = UVC_GUID_FORMAT_INZI,
.fcc = V4L2_PIX_FMT_INZI,
},
};
/* ------------------------------------------------------------------------
* Utility functions
*/
struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
__u8 epaddr)
{
struct usb_host_endpoint *ep;
unsigned int i;
for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
ep = &alts->endpoint[i];
if (ep->desc.bEndpointAddress == epaddr)
return ep;
}
return NULL;
}
static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
{
unsigned int len = ARRAY_SIZE(uvc_fmts);
unsigned int i;
for (i = 0; i < len; ++i) {
if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
return &uvc_fmts[i];
}
return NULL;
}
static __u32 uvc_colorspace(const __u8 primaries)
{
static const __u8 colorprimaries[] = {
0,
V4L2_COLORSPACE_SRGB,
V4L2_COLORSPACE_470_SYSTEM_M,
V4L2_COLORSPACE_470_SYSTEM_BG,
V4L2_COLORSPACE_SMPTE170M,
V4L2_COLORSPACE_SMPTE240M,
};
if (primaries < ARRAY_SIZE(colorprimaries))
return colorprimaries[primaries];
return 0;
}
/* Simplify a fraction using a simple continued fraction decomposition. The
* idea here is to convert fractions such as 333333/10000000 to 1/30 using
* 32 bit arithmetic only. The algorithm is not perfect and relies upon two
* arbitrary parameters to remove non-significative terms from the simple
* continued fraction decomposition. Using 8 and 333 for n_terms and threshold
* respectively seems to give nice results.
*/
void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
unsigned int n_terms, unsigned int threshold)
{
uint32_t *an;
uint32_t x, y, r;
unsigned int i, n;
an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
if (an == NULL)
return;
/* Convert the fraction to a simple continued fraction. See
* http://mathforum.org/dr.math/faq/faq.fractions.html
* Stop if the current term is bigger than or equal to the given
* threshold.
*/
x = *numerator;
y = *denominator;
for (n = 0; n < n_terms && y != 0; ++n) {
an[n] = x / y;
if (an[n] >= threshold) {
if (n < 2)
n++;
break;
}
r = x - an[n] * y;
x = y;
y = r;
}
/* Expand the simple continued fraction back to an integer fraction. */
x = 0;
y = 1;
for (i = n; i > 0; --i) {
r = y;
y = an[i-1] * y + x;
x = r;
}
*numerator = y;
*denominator = x;
kfree(an);
}
/* Convert a fraction to a frame interval in 100ns multiples. The idea here is
* to compute numerator / denominator * 10000000 using 32 bit fixed point
* arithmetic only.
*/
uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
{
uint32_t multiplier;
/* Saturate the result if the operation would overflow. */
if (denominator == 0 ||
numerator/denominator >= ((uint32_t)-1)/10000000)
return (uint32_t)-1;
/* Divide both the denominator and the multiplier by two until
* numerator * multiplier doesn't overflow. If anyone knows a better
* algorithm please let me know.
*/
multiplier = 10000000;
while (numerator > ((uint32_t)-1)/multiplier) {
multiplier /= 2;
denominator /= 2;
}
return denominator ? numerator * multiplier / denominator : 0;
}
/* ------------------------------------------------------------------------
* Terminal and unit management
*/
struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
{
struct uvc_entity *entity;
list_for_each_entry(entity, &dev->entities, list) {
if (entity->id == id)
return entity;
}
return NULL;
}
static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
int id, struct uvc_entity *entity)
{
unsigned int i;
if (entity == NULL)
entity = list_entry(&dev->entities, struct uvc_entity, list);
list_for_each_entry_continue(entity, &dev->entities, list) {
for (i = 0; i < entity->bNrInPins; ++i)
if (entity->baSourceID[i] == id)
return entity;
}
return NULL;
}
static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
{
struct uvc_streaming *stream;
list_for_each_entry(stream, &dev->streams, list) {
if (stream->header.bTerminalLink == id)
return stream;
}
return NULL;
}
/* ------------------------------------------------------------------------
* Descriptors parsing
*/
static int uvc_parse_format(struct uvc_device *dev,
struct uvc_streaming *streaming, struct uvc_format *format,
__u32 **intervals, unsigned char *buffer, int buflen)
{
struct usb_interface *intf = streaming->intf;
struct usb_host_interface *alts = intf->cur_altsetting;
struct uvc_format_desc *fmtdesc;
struct uvc_frame *frame;
const unsigned char *start = buffer;
unsigned int width_multiplier = 1;
unsigned int interval;
unsigned int i, n;
__u8 ftype;
format->type = buffer[2];
format->index = buffer[3];
switch (buffer[2]) {
case UVC_VS_FORMAT_UNCOMPRESSED:
case UVC_VS_FORMAT_FRAME_BASED:
n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
if (buflen < n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d FORMAT error\n",
dev->udev->devnum,
alts->desc.bInterfaceNumber);
return -EINVAL;
}
/* Find the format descriptor from its GUID. */
fmtdesc = uvc_format_by_guid(&buffer[5]);
if (fmtdesc != NULL) {
strlcpy(format->name, fmtdesc->name,
sizeof format->name);
format->fcc = fmtdesc->fcc;
} else {
uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
&buffer[5]);
snprintf(format->name, sizeof(format->name), "%pUl\n",
&buffer[5]);
format->fcc = 0;
}
format->bpp = buffer[21];
/* Some devices report a format that doesn't match what they
* really send.
*/
if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
if (format->fcc == V4L2_PIX_FMT_YUYV) {
strlcpy(format->name, "Greyscale 8-bit (Y8 )",
sizeof(format->name));
format->fcc = V4L2_PIX_FMT_GREY;
format->bpp = 8;
width_multiplier = 2;
}
}
if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
ftype = UVC_VS_FRAME_UNCOMPRESSED;
} else {
ftype = UVC_VS_FRAME_FRAME_BASED;
if (buffer[27])
format->flags = UVC_FMT_FLAG_COMPRESSED;
}
break;
case UVC_VS_FORMAT_MJPEG:
if (buflen < 11) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d FORMAT error\n",
dev->udev->devnum,
alts->desc.bInterfaceNumber);
return -EINVAL;
}
strlcpy(format->name, "MJPEG", sizeof format->name);
format->fcc = V4L2_PIX_FMT_MJPEG;
format->flags = UVC_FMT_FLAG_COMPRESSED;
format->bpp = 0;
ftype = UVC_VS_FRAME_MJPEG;
break;
case UVC_VS_FORMAT_DV:
if (buflen < 9) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d FORMAT error\n",
dev->udev->devnum,
alts->desc.bInterfaceNumber);
return -EINVAL;
}
switch (buffer[8] & 0x7f) {
case 0:
strlcpy(format->name, "SD-DV", sizeof format->name);
break;
case 1:
strlcpy(format->name, "SDL-DV", sizeof format->name);
break;
case 2:
strlcpy(format->name, "HD-DV", sizeof format->name);
break;
default:
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d: unknown DV format %u\n",
dev->udev->devnum,
alts->desc.bInterfaceNumber, buffer[8]);
return -EINVAL;
}
strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
sizeof format->name);
format->fcc = V4L2_PIX_FMT_DV;
format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
format->bpp = 0;
ftype = 0;
/* Create a dummy frame descriptor. */
frame = &format->frame[0];
memset(&format->frame[0], 0, sizeof format->frame[0]);
frame->bFrameIntervalType = 1;
frame->dwDefaultFrameInterval = 1;
frame->dwFrameInterval = *intervals;
*(*intervals)++ = 1;
format->nframes = 1;
break;
case UVC_VS_FORMAT_MPEG2TS:
case UVC_VS_FORMAT_STREAM_BASED:
/* Not supported yet. */
default:
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d unsupported format %u\n",
dev->udev->devnum, alts->desc.bInterfaceNumber,
buffer[2]);
return -EINVAL;
}
uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
buflen -= buffer[0];
buffer += buffer[0];
/* Parse the frame descriptors. Only uncompressed, MJPEG and frame
* based formats have frame descriptors.
*/
while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
buffer[2] == ftype) {
frame = &format->frame[format->nframes];
if (ftype != UVC_VS_FRAME_FRAME_BASED)
n = buflen > 25 ? buffer[25] : 0;
else
n = buflen > 21 ? buffer[21] : 0;
n = n ? n : 3;
if (buflen < 26 + 4*n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d FRAME error\n", dev->udev->devnum,
alts->desc.bInterfaceNumber);
return -EINVAL;
}
frame->bFrameIndex = buffer[3];
frame->bmCapabilities = buffer[4];
frame->wWidth = get_unaligned_le16(&buffer[5])
* width_multiplier;
frame->wHeight = get_unaligned_le16(&buffer[7]);
frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
if (ftype != UVC_VS_FRAME_FRAME_BASED) {
frame->dwMaxVideoFrameBufferSize =
get_unaligned_le32(&buffer[17]);
frame->dwDefaultFrameInterval =
get_unaligned_le32(&buffer[21]);
frame->bFrameIntervalType = buffer[25];
} else {
frame->dwMaxVideoFrameBufferSize = 0;
frame->dwDefaultFrameInterval =
get_unaligned_le32(&buffer[17]);
frame->bFrameIntervalType = buffer[21];
}
frame->dwFrameInterval = *intervals;
/* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
* completely. Observed behaviours range from setting the
* value to 1.1x the actual frame size to hardwiring the
* 16 low bits to 0. This results in a higher than necessary
* memory usage as well as a wrong image size information. For
* uncompressed formats this can be fixed by computing the
* value from the frame size.
*/
if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
frame->dwMaxVideoFrameBufferSize = format->bpp
* frame->wWidth * frame->wHeight / 8;
/* Some bogus devices report dwMinFrameInterval equal to
* dwMaxFrameInterval and have dwFrameIntervalStep set to
* zero. Setting all null intervals to 1 fixes the problem and
* some other divisions by zero that could happen.
*/
for (i = 0; i < n; ++i) {
interval = get_unaligned_le32(&buffer[26+4*i]);
*(*intervals)++ = interval ? interval : 1;
}
/* Make sure that the default frame interval stays between
* the boundaries.
*/
n -= frame->bFrameIntervalType ? 1 : 2;
frame->dwDefaultFrameInterval =
min(frame->dwFrameInterval[n],
max(frame->dwFrameInterval[0],
frame->dwDefaultFrameInterval));
if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
frame->bFrameIntervalType = 1;
frame->dwFrameInterval[0] =
frame->dwDefaultFrameInterval;
}
uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
frame->wWidth, frame->wHeight,
10000000/frame->dwDefaultFrameInterval,
(100000000/frame->dwDefaultFrameInterval)%10);
format->nframes++;
buflen -= buffer[0];
buffer += buffer[0];
}
if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
buflen -= buffer[0];
buffer += buffer[0];
}
if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
buffer[2] == UVC_VS_COLORFORMAT) {
if (buflen < 6) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d COLORFORMAT error\n",
dev->udev->devnum,
alts->desc.bInterfaceNumber);
return -EINVAL;
}
format->colorspace = uvc_colorspace(buffer[3]);
buflen -= buffer[0];
buffer += buffer[0];
}
return buffer - start;
}
static int uvc_parse_streaming(struct uvc_device *dev,
struct usb_interface *intf)
{
struct uvc_streaming *streaming = NULL;
struct uvc_format *format;
struct uvc_frame *frame;
struct usb_host_interface *alts = &intf->altsetting[0];
unsigned char *_buffer, *buffer = alts->extra;
int _buflen, buflen = alts->extralen;
unsigned int nformats = 0, nframes = 0, nintervals = 0;
unsigned int size, i, n, p;
__u32 *interval;
__u16 psize;
int ret = -EINVAL;
if (intf->cur_altsetting->desc.bInterfaceSubClass
!= UVC_SC_VIDEOSTREAMING) {
uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
"video streaming interface\n", dev->udev->devnum,
intf->altsetting[0].desc.bInterfaceNumber);
return -EINVAL;
}
if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
"claimed\n", dev->udev->devnum,
intf->altsetting[0].desc.bInterfaceNumber);
return -EINVAL;
}
streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
if (streaming == NULL) {
usb_driver_release_interface(&uvc_driver.driver, intf);
return -EINVAL;
}
mutex_init(&streaming->mutex);
streaming->dev = dev;
streaming->intf = usb_get_intf(intf);
streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
/* The Pico iMage webcam has its class-specific interface descriptors
* after the endpoint descriptors.
*/
if (buflen == 0) {
for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
struct usb_host_endpoint *ep = &alts->endpoint[i];
if (ep->extralen == 0)
continue;
if (ep->extralen > 2 &&
ep->extra[1] == USB_DT_CS_INTERFACE) {
uvc_trace(UVC_TRACE_DESCR, "trying extra data "
"from endpoint %u.\n", i);
buffer = alts->endpoint[i].extra;
buflen = alts->endpoint[i].extralen;
break;
}
}
}
/* Skip the standard interface descriptors. */
while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
buflen -= buffer[0];
buffer += buffer[0];
}
if (buflen <= 2) {
uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
"interface descriptors found.\n");
goto error;
}
/* Parse the header descriptor. */
switch (buffer[2]) {
case UVC_VS_OUTPUT_HEADER:
streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
size = 9;
break;
case UVC_VS_INPUT_HEADER:
streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
size = 13;
break;
default:
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
"%d HEADER descriptor not found.\n", dev->udev->devnum,
alts->desc.bInterfaceNumber);
goto error;
}
p = buflen >= 4 ? buffer[3] : 0;
n = buflen >= size ? buffer[size-1] : 0;
if (buflen < size + p*n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d HEADER descriptor is invalid.\n",
dev->udev->devnum, alts->desc.bInterfaceNumber);
goto error;
}
streaming->header.bNumFormats = p;
streaming->header.bEndpointAddress = buffer[6];
if (buffer[2] == UVC_VS_INPUT_HEADER) {
streaming->header.bmInfo = buffer[7];
streaming->header.bTerminalLink = buffer[8];
streaming->header.bStillCaptureMethod = buffer[9];
streaming->header.bTriggerSupport = buffer[10];
streaming->header.bTriggerUsage = buffer[11];
} else {
streaming->header.bTerminalLink = buffer[7];
}
streaming->header.bControlSize = n;
streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
GFP_KERNEL);
if (streaming->header.bmaControls == NULL) {
ret = -ENOMEM;
goto error;
}
buflen -= buffer[0];
buffer += buffer[0];
_buffer = buffer;
_buflen = buflen;
/* Count the format and frame descriptors. */
while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
switch (_buffer[2]) {
case UVC_VS_FORMAT_UNCOMPRESSED:
case UVC_VS_FORMAT_MJPEG:
case UVC_VS_FORMAT_FRAME_BASED:
nformats++;
break;
case UVC_VS_FORMAT_DV:
/* DV format has no frame descriptor. We will create a
* dummy frame descriptor with a dummy frame interval.
*/
nformats++;
nframes++;
nintervals++;
break;
case UVC_VS_FORMAT_MPEG2TS:
case UVC_VS_FORMAT_STREAM_BASED:
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
"interface %d FORMAT %u is not supported.\n",
dev->udev->devnum,
alts->desc.bInterfaceNumber, _buffer[2]);
break;
case UVC_VS_FRAME_UNCOMPRESSED:
case UVC_VS_FRAME_MJPEG:
nframes++;
if (_buflen > 25)
nintervals += _buffer[25] ? _buffer[25] : 3;
break;
case UVC_VS_FRAME_FRAME_BASED:
nframes++;
if (_buflen > 21)
nintervals += _buffer[21] ? _buffer[21] : 3;
break;
}
_buflen -= _buffer[0];
_buffer += _buffer[0];
}
if (nformats == 0) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
"%d has no supported formats defined.\n",
dev->udev->devnum, alts->desc.bInterfaceNumber);
goto error;
}
size = nformats * sizeof *format + nframes * sizeof *frame
+ nintervals * sizeof *interval;
format = kzalloc(size, GFP_KERNEL);
if (format == NULL) {
ret = -ENOMEM;
goto error;
}
frame = (struct uvc_frame *)&format[nformats];
interval = (__u32 *)&frame[nframes];
streaming->format = format;
streaming->nformats = nformats;
/* Parse the format descriptors. */
while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
switch (buffer[2]) {
case UVC_VS_FORMAT_UNCOMPRESSED:
case UVC_VS_FORMAT_MJPEG:
case UVC_VS_FORMAT_DV:
case UVC_VS_FORMAT_FRAME_BASED:
format->frame = frame;
ret = uvc_parse_format(dev, streaming, format,
&interval, buffer, buflen);
if (ret < 0)
goto error;
frame += format->nframes;
format++;
buflen -= ret;
buffer += ret;
continue;
default:
break;
}
buflen -= buffer[0];
buffer += buffer[0];
}
if (buflen)
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
"%d has %u bytes of trailing descriptor garbage.\n",
dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
/* Parse the alternate settings to find the maximum bandwidth. */
for (i = 0; i < intf->num_altsetting; ++i) {
struct usb_host_endpoint *ep;
alts = &intf->altsetting[i];
ep = uvc_find_endpoint(alts,
streaming->header.bEndpointAddress);
if (ep == NULL)
continue;
psize = le16_to_cpu(ep->desc.wMaxPacketSize);
psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
if (psize > streaming->maxpsize)
streaming->maxpsize = psize;
}
list_add_tail(&streaming->list, &dev->streams);
return 0;
error:
usb_driver_release_interface(&uvc_driver.driver, intf);
usb_put_intf(intf);
kfree(streaming->format);
kfree(streaming->header.bmaControls);
kfree(streaming);
return ret;
}
static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
unsigned int num_pads, unsigned int extra_size)
{
struct uvc_entity *entity;
unsigned int num_inputs;
unsigned int size;
unsigned int i;
extra_size = ALIGN(extra_size, sizeof(*entity->pads));
num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
+ num_inputs;
entity = kzalloc(size, GFP_KERNEL);
if (entity == NULL)
return NULL;
entity->id = id;
entity->type = type;
entity->num_links = 0;
entity->num_pads = num_pads;
entity->pads = ((void *)(entity + 1)) + extra_size;
for (i = 0; i < num_inputs; ++i)
entity->pads[i].flags = MEDIA_PAD_FL_SINK;
if (!UVC_ENTITY_IS_OTERM(entity))
entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
entity->bNrInPins = num_inputs;
entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
return entity;
}
/* Parse vendor-specific extensions. */
static int uvc_parse_vendor_control(struct uvc_device *dev,
const unsigned char *buffer, int buflen)
{
struct usb_device *udev = dev->udev;
struct usb_host_interface *alts = dev->intf->cur_altsetting;
struct uvc_entity *unit;
unsigned int n, p;
int handled = 0;
switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
case 0x046d: /* Logitech */
if (buffer[1] != 0x41 || buffer[2] != 0x01)
break;
/* Logitech implements several vendor specific functions
* through vendor specific extension units (LXU).
*
* The LXU descriptors are similar to XU descriptors
* (see "USB Device Video Class for Video Devices", section
* 3.7.2.6 "Extension Unit Descriptor") with the following
* differences:
*
* ----------------------------------------------------------
* 0 bLength 1 Number
* Size of this descriptor, in bytes: 24+p+n*2
* ----------------------------------------------------------
* 23+p+n bmControlsType N Bitmap
* Individual bits in the set are defined:
* 0: Absolute
* 1: Relative
*
* This bitset is mapped exactly the same as bmControls.
* ----------------------------------------------------------
* 23+p+n*2 bReserved 1 Boolean
* ----------------------------------------------------------
* 24+p+n*2 iExtension 1 Index
* Index of a string descriptor that describes this
* extension unit.
* ----------------------------------------------------------
*/
p = buflen >= 22 ? buffer[21] : 0;
n = buflen >= 25 + p ? buffer[22+p] : 0;
if (buflen < 25 + p + 2*n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d EXTENSION_UNIT error\n",
udev->devnum, alts->desc.bInterfaceNumber);
break;
}
unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
p + 1, 2*n);
if (unit == NULL)
return -ENOMEM;
memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
unit->extension.bNumControls = buffer[20];
memcpy(unit->baSourceID, &buffer[22], p);
unit->extension.bControlSize = buffer[22+p];
unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
+ n;
memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
if (buffer[24+p+2*n] != 0)
usb_string(udev, buffer[24+p+2*n], unit->name,
sizeof unit->name);
else
sprintf(unit->name, "Extension %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
handled = 1;
break;
}
return handled;
}
static int uvc_parse_standard_control(struct uvc_device *dev,
const unsigned char *buffer, int buflen)
{
struct usb_device *udev = dev->udev;
struct uvc_entity *unit, *term;
struct usb_interface *intf;
struct usb_host_interface *alts = dev->intf->cur_altsetting;
unsigned int i, n, p, len;
__u16 type;
switch (buffer[2]) {
case UVC_VC_HEADER:
n = buflen >= 12 ? buffer[11] : 0;
if (buflen < 12 + n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d HEADER error\n", udev->devnum,
alts->desc.bInterfaceNumber);
return -EINVAL;
}
dev->uvc_version = get_unaligned_le16(&buffer[3]);
dev->clock_frequency = get_unaligned_le32(&buffer[7]);
/* Parse all USB Video Streaming interfaces. */
for (i = 0; i < n; ++i) {
intf = usb_ifnum_to_if(udev, buffer[12+i]);
if (intf == NULL) {
uvc_trace(UVC_TRACE_DESCR, "device %d "
"interface %d doesn't exists\n",
udev->devnum, i);
continue;
}
uvc_parse_streaming(dev, intf);
}
break;
case UVC_VC_INPUT_TERMINAL:
if (buflen < 8) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d INPUT_TERMINAL error\n",
udev->devnum, alts->desc.bInterfaceNumber);
return -EINVAL;
}
/* Make sure the terminal type MSB is not null, otherwise it
* could be confused with a unit.
*/
type = get_unaligned_le16(&buffer[4]);
if ((type & 0xff00) == 0) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d INPUT_TERMINAL %d has invalid "
"type 0x%04x, skipping\n", udev->devnum,
alts->desc.bInterfaceNumber,
buffer[3], type);
return 0;
}
n = 0;
p = 0;
len = 8;
if (type == UVC_ITT_CAMERA) {
n = buflen >= 15 ? buffer[14] : 0;
len = 15;
} else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
n = buflen >= 9 ? buffer[8] : 0;
p = buflen >= 10 + n ? buffer[9+n] : 0;
len = 10;
}
if (buflen < len + n + p) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d INPUT_TERMINAL error\n",
udev->devnum, alts->desc.bInterfaceNumber);
return -EINVAL;
}
term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1, n + p);
if (term == NULL)
return -ENOMEM;
if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
term->camera.bControlSize = n;
term->camera.bmControls = (__u8 *)term + sizeof *term;
term->camera.wObjectiveFocalLengthMin =
get_unaligned_le16(&buffer[8]);
term->camera.wObjectiveFocalLengthMax =
get_unaligned_le16(&buffer[10]);
term->camera.wOcularFocalLength =
get_unaligned_le16(&buffer[12]);
memcpy(term->camera.bmControls, &buffer[15], n);
} else if (UVC_ENTITY_TYPE(term) ==
UVC_ITT_MEDIA_TRANSPORT_INPUT) {
term->media.bControlSize = n;
term->media.bmControls = (__u8 *)term + sizeof *term;
term->media.bTransportModeSize = p;
term->media.bmTransportModes = (__u8 *)term
+ sizeof *term + n;
memcpy(term->media.bmControls, &buffer[9], n);
memcpy(term->media.bmTransportModes, &buffer[10+n], p);
}
if (buffer[7] != 0)
usb_string(udev, buffer[7], term->name,
sizeof term->name);
else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
sprintf(term->name, "Camera %u", buffer[3]);
else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
sprintf(term->name, "Media %u", buffer[3]);
else
sprintf(term->name, "Input %u", buffer[3]);
list_add_tail(&term->list, &dev->entities);
break;
case UVC_VC_OUTPUT_TERMINAL:
if (buflen < 9) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d OUTPUT_TERMINAL error\n",
udev->devnum, alts->desc.bInterfaceNumber);
return -EINVAL;
}
/* Make sure the terminal type MSB is not null, otherwise it
* could be confused with a unit.
*/
type = get_unaligned_le16(&buffer[4]);
if ((type & 0xff00) == 0) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d OUTPUT_TERMINAL %d has invalid "
"type 0x%04x, skipping\n", udev->devnum,
alts->desc.bInterfaceNumber, buffer[3], type);
return 0;
}
term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1, 0);
if (term == NULL)
return -ENOMEM;
memcpy(term->baSourceID, &buffer[7], 1);
if (buffer[8] != 0)
usb_string(udev, buffer[8], term->name,
sizeof term->name);
else
sprintf(term->name, "Output %u", buffer[3]);
list_add_tail(&term->list, &dev->entities);
break;
case UVC_VC_SELECTOR_UNIT:
p = buflen >= 5 ? buffer[4] : 0;
if (buflen < 5 || buflen < 6 + p) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d SELECTOR_UNIT error\n",
udev->devnum, alts->desc.bInterfaceNumber);
return -EINVAL;
}
unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
if (unit == NULL)
return -ENOMEM;
memcpy(unit->baSourceID, &buffer[5], p);
if (buffer[5+p] != 0)
usb_string(udev, buffer[5+p], unit->name,
sizeof unit->name);
else
sprintf(unit->name, "Selector %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
break;
case UVC_VC_PROCESSING_UNIT:
n = buflen >= 8 ? buffer[7] : 0;
p = dev->uvc_version >= 0x0110 ? 10 : 9;
if (buflen < p + n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d PROCESSING_UNIT error\n",
udev->devnum, alts->desc.bInterfaceNumber);
return -EINVAL;
}
unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
if (unit == NULL)
return -ENOMEM;
memcpy(unit->baSourceID, &buffer[4], 1);
unit->processing.wMaxMultiplier =
get_unaligned_le16(&buffer[5]);
unit->processing.bControlSize = buffer[7];
unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
memcpy(unit->processing.bmControls, &buffer[8], n);
if (dev->uvc_version >= 0x0110)
unit->processing.bmVideoStandards = buffer[9+n];
if (buffer[8+n] != 0)
usb_string(udev, buffer[8+n], unit->name,
sizeof unit->name);
else
sprintf(unit->name, "Processing %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
break;
case UVC_VC_EXTENSION_UNIT:
p = buflen >= 22 ? buffer[21] : 0;
n = buflen >= 24 + p ? buffer[22+p] : 0;
if (buflen < 24 + p + n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
"interface %d EXTENSION_UNIT error\n",
udev->devnum, alts->desc.bInterfaceNumber);
return -EINVAL;
}
unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
if (unit == NULL)
return -ENOMEM;
memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
unit->extension.bNumControls = buffer[20];
memcpy(unit->baSourceID, &buffer[22], p);
unit->extension.bControlSize = buffer[22+p];
unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
memcpy(unit->extension.bmControls, &buffer[23+p], n);
if (buffer[23+p+n] != 0)
usb_string(udev, buffer[23+p+n], unit->name,
sizeof unit->name);
else
sprintf(unit->name, "Extension %u", buffer[3]);
list_add_tail(&unit->list, &dev->entities);
break;
default:
uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
"descriptor (%u)\n", buffer[2]);
break;
}
return 0;
}
static int uvc_parse_control(struct uvc_device *dev)
{
struct usb_host_interface *alts = dev->intf->cur_altsetting;
unsigned char *buffer = alts->extra;
int buflen = alts->extralen;
int ret;
/* Parse the default alternate setting only, as the UVC specification
* defines a single alternate setting, the default alternate setting
* zero.
*/
while (buflen > 2) {
if (uvc_parse_vendor_control(dev, buffer, buflen) ||
buffer[1] != USB_DT_CS_INTERFACE)
goto next_descriptor;
if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
return ret;
next_descriptor:
buflen -= buffer[0];
buffer += buffer[0];
}
/* Check if the optional status endpoint is present. Built-in iSight
* webcams have an interrupt endpoint but spit proprietary data that
* don't conform to the UVC status endpoint messages. Don't try to
* handle the interrupt endpoint for those cameras.
*/
if (alts->desc.bNumEndpoints == 1 &&
!(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
struct usb_host_endpoint *ep = &alts->endpoint[0];
struct usb_endpoint_descriptor *desc = &ep->desc;
if (usb_endpoint_is_int_in(desc) &&
le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
desc->bInterval != 0) {
uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
"(addr %02x).\n", desc->bEndpointAddress);
dev->int_ep = ep;
}
}
return 0;
}
/* ------------------------------------------------------------------------
* UVC device scan
*/
/*
* Scan the UVC descriptors to locate a chain starting at an Output Terminal
* and containing the following units:
*
* - one or more Output Terminals (USB Streaming or Display)
* - zero or one Processing Unit
* - zero, one or more single-input Selector Units
* - zero or one multiple-input Selector Units, provided all inputs are
* connected to input terminals
* - zero, one or mode single-input Extension Units
* - one or more Input Terminals (Camera, External or USB Streaming)
*
* The terminal and units must match on of the following structures:
*
* ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0)
* ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ...
* ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n)
*
* +---------+ +---------+ -> OTT_*(0)
* TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ...
* +---------+ +---------+ -> OTT_*(n)
*
* The Processing Unit and Extension Units can be in any order. Additional
* Extension Units connected to the main chain as single-unit branches are
* also supported. Single-input Selector Units are ignored.
*/
static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
struct uvc_entity *entity)
{
switch (UVC_ENTITY_TYPE(entity)) {
case UVC_VC_EXTENSION_UNIT:
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- XU %d", entity->id);
if (entity->bNrInPins != 1) {
uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
"than 1 input pin.\n", entity->id);
return -1;
}
break;
case UVC_VC_PROCESSING_UNIT:
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- PU %d", entity->id);
if (chain->processing != NULL) {
uvc_trace(UVC_TRACE_DESCR, "Found multiple "
"Processing Units in chain.\n");
return -1;
}
chain->processing = entity;
break;
case UVC_VC_SELECTOR_UNIT:
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- SU %d", entity->id);
/* Single-input selector units are ignored. */
if (entity->bNrInPins == 1)
break;
if (chain->selector != NULL) {
uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
"Units in chain.\n");
return -1;
}
chain->selector = entity;
break;
case UVC_ITT_VENDOR_SPECIFIC:
case UVC_ITT_CAMERA:
case UVC_ITT_MEDIA_TRANSPORT_INPUT:
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- IT %d\n", entity->id);
break;
case UVC_OTT_VENDOR_SPECIFIC:
case UVC_OTT_DISPLAY:
case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " OT %d", entity->id);
break;
case UVC_TT_STREAMING:
if (UVC_ENTITY_IS_ITERM(entity)) {
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- IT %d\n", entity->id);
} else {
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " OT %d", entity->id);
}
break;
default:
uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
"0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
return -1;
}
list_add_tail(&entity->chain, &chain->entities);
return 0;
}
static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
struct uvc_entity *entity, struct uvc_entity *prev)
{
struct uvc_entity *forward;
int found;
/* Forward scan */
forward = NULL;
found = 0;
while (1) {
forward = uvc_entity_by_reference(chain->dev, entity->id,
forward);
if (forward == NULL)
break;
if (forward == prev)
continue;
switch (UVC_ENTITY_TYPE(forward)) {
case UVC_VC_EXTENSION_UNIT:
if (forward->bNrInPins != 1) {
uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
"has more than 1 input pin.\n",
entity->id);
return -EINVAL;
}
list_add_tail(&forward->chain, &chain->entities);
if (uvc_trace_param & UVC_TRACE_PROBE) {
if (!found)
printk(KERN_CONT " (->");
printk(KERN_CONT " XU %d", forward->id);
found = 1;
}
break;
case UVC_OTT_VENDOR_SPECIFIC:
case UVC_OTT_DISPLAY:
case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
case UVC_TT_STREAMING:
if (UVC_ENTITY_IS_ITERM(forward)) {
uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
"terminal %u.\n", forward->id);
return -EINVAL;
}
list_add_tail(&forward->chain, &chain->entities);
if (uvc_trace_param & UVC_TRACE_PROBE) {
if (!found)
printk(KERN_CONT " (->");
printk(KERN_CONT " OT %d", forward->id);
found = 1;
}
break;
}
}
if (found)
printk(KERN_CONT ")");
return 0;
}
static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
struct uvc_entity **_entity)
{
struct uvc_entity *entity = *_entity;
struct uvc_entity *term;
int id = -EINVAL, i;
switch (UVC_ENTITY_TYPE(entity)) {
case UVC_VC_EXTENSION_UNIT:
case UVC_VC_PROCESSING_UNIT:
id = entity->baSourceID[0];
break;
case UVC_VC_SELECTOR_UNIT:
/* Single-input selector units are ignored. */
if (entity->bNrInPins == 1) {
id = entity->baSourceID[0];
break;
}
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " <- IT");
chain->selector = entity;
for (i = 0; i < entity->bNrInPins; ++i) {
id = entity->baSourceID[i];
term = uvc_entity_by_id(chain->dev, id);
if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
"input %d isn't connected to an "
"input terminal\n", entity->id, i);
return -1;
}
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT " %d", term->id);
list_add_tail(&term->chain, &chain->entities);
uvc_scan_chain_forward(chain, term, entity);
}
if (uvc_trace_param & UVC_TRACE_PROBE)
printk(KERN_CONT "\n");
id = 0;
break;
case UVC_ITT_VENDOR_SPECIFIC:
case UVC_ITT_CAMERA:
case UVC_ITT_MEDIA_TRANSPORT_INPUT:
case UVC_OTT_VENDOR_SPECIFIC:
case UVC_OTT_DISPLAY:
case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
case UVC_TT_STREAMING:
id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
break;
}
if (id <= 0) {
*_entity = NULL;
return id;
}
entity = uvc_entity_by_id(chain->dev, id);
if (entity == NULL) {
uvc_trace(UVC_TRACE_DESCR, "Found reference to "
"unknown entity %d.\n", id);
return -EINVAL;
}
*_entity = entity;
return 0;
}
static int uvc_scan_chain(struct uvc_video_chain *chain,
struct uvc_entity *term)
{
struct uvc_entity *entity, *prev;
uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
entity = term;
prev = NULL;
while (entity != NULL) {
/* Entity must not be part of an existing chain */
if (entity->chain.next || entity->chain.prev) {
uvc_trace(UVC_TRACE_DESCR, "Found reference to "
"entity %d already in chain.\n", entity->id);
return -EINVAL;
}
/* Process entity */
if (uvc_scan_chain_entity(chain, entity) < 0)
return -EINVAL;
/* Forward scan */
if (uvc_scan_chain_forward(chain, entity, prev) < 0)
return -EINVAL;
/* Backward scan */
prev = entity;
if (uvc_scan_chain_backward(chain, &entity) < 0)
return -EINVAL;
}
return 0;
}
static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
char *buffer)
{
struct uvc_entity *term;
unsigned int nterms = 0;
char *p = buffer;
list_for_each_entry(term, terms, chain) {
if (!UVC_ENTITY_IS_TERM(term) ||
UVC_TERM_DIRECTION(term) != dir)
continue;
if (nterms)
p += sprintf(p, ",");
if (++nterms >= 4) {
p += sprintf(p, "...");
break;
}
p += sprintf(p, "%u", term->id);
}
return p - buffer;
}
static const char *uvc_print_chain(struct uvc_video_chain *chain)
{
static char buffer[43];
char *p = buffer;
p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
p += sprintf(p, " -> ");
uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
return buffer;
}
static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev)
{
struct uvc_video_chain *chain;
chain = kzalloc(sizeof(*chain), GFP_KERNEL);
if (chain == NULL)
return NULL;
INIT_LIST_HEAD(&chain->entities);
mutex_init(&chain->ctrl_mutex);
chain->dev = dev;
v4l2_prio_init(&chain->prio);
return chain;
}
/*
* Fallback heuristic for devices that don't connect units and terminals in a
* valid chain.
*
* Some devices have invalid baSourceID references, causing uvc_scan_chain()
* to fail, but if we just take the entities we can find and put them together
* in the most sensible chain we can think of, turns out they do work anyway.
* Note: This heuristic assumes there is a single chain.
*
* At the time of writing, devices known to have such a broken chain are
* - Acer Integrated Camera (5986:055a)
* - Realtek rtl157a7 (0bda:57a7)
*/
static int uvc_scan_fallback(struct uvc_device *dev)
{
struct uvc_video_chain *chain;
struct uvc_entity *iterm = NULL;
struct uvc_entity *oterm = NULL;
struct uvc_entity *entity;
struct uvc_entity *prev;
/*
* Start by locating the input and output terminals. We only support
* devices with exactly one of each for now.
*/
list_for_each_entry(entity, &dev->entities, list) {
if (UVC_ENTITY_IS_ITERM(entity)) {
if (iterm)
return -EINVAL;
iterm = entity;
}
if (UVC_ENTITY_IS_OTERM(entity)) {
if (oterm)
return -EINVAL;
oterm = entity;
}
}
if (iterm == NULL || oterm == NULL)
return -EINVAL;
/* Allocate the chain and fill it. */
chain = uvc_alloc_chain(dev);
if (chain == NULL)
return -ENOMEM;
if (uvc_scan_chain_entity(chain, oterm) < 0)
goto error;
prev = oterm;
/*
* Add all Processing and Extension Units with two pads. The order
* doesn't matter much, use reverse list traversal to connect units in
* UVC descriptor order as we build the chain from output to input. This
* leads to units appearing in the order meant by the manufacturer for
* the cameras known to require this heuristic.
*/
list_for_each_entry_reverse(entity, &dev->entities, list) {
if (entity->type != UVC_VC_PROCESSING_UNIT &&
entity->type != UVC_VC_EXTENSION_UNIT)
continue;
if (entity->num_pads != 2)
continue;
if (uvc_scan_chain_entity(chain, entity) < 0)
goto error;
prev->baSourceID[0] = entity->id;
prev = entity;
}
if (uvc_scan_chain_entity(chain, iterm) < 0)
goto error;
prev->baSourceID[0] = iterm->id;
list_add_tail(&chain->list, &dev->chains);
uvc_trace(UVC_TRACE_PROBE,
"Found a video chain by fallback heuristic (%s).\n",
uvc_print_chain(chain));
return 0;
error:
kfree(chain);
return -EINVAL;
}
/*
* Scan the device for video chains and register video devices.
*
* Chains are scanned starting at their output terminals and walked backwards.
*/
static int uvc_scan_device(struct uvc_device *dev)
{
struct uvc_video_chain *chain;
struct uvc_entity *term;
list_for_each_entry(term, &dev->entities, list) {
if (!UVC_ENTITY_IS_OTERM(term))
continue;
/* If the terminal is already included in a chain, skip it.
* This can happen for chains that have multiple output
* terminals, where all output terminals beside the first one
* will be inserted in the chain in forward scans.
*/
if (term->chain.next || term->chain.prev)
continue;
chain = uvc_alloc_chain(dev);
if (chain == NULL)
return -ENOMEM;
term->flags |= UVC_ENTITY_FLAG_DEFAULT;
if (uvc_scan_chain(chain, term) < 0) {
kfree(chain);
continue;
}
uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
uvc_print_chain(chain));
list_add_tail(&chain->list, &dev->chains);
}
if (list_empty(&dev->chains))
uvc_scan_fallback(dev);
if (list_empty(&dev->chains)) {
uvc_printk(KERN_INFO, "No valid video chain found.\n");
return -1;
}
return 0;
}
/* ------------------------------------------------------------------------
* Video device registration and unregistration
*/
/*
* Delete the UVC device.
*
* Called by the kernel when the last reference to the uvc_device structure
* is released.
*
* As this function is called after or during disconnect(), all URBs have
* already been canceled by the USB core. There is no need to kill the
* interrupt URB manually.
*/
static void uvc_delete(struct kref *kref)
{
struct uvc_device *dev = container_of(kref, struct uvc_device, ref);
struct list_head *p, *n;
uvc_status_cleanup(dev);
uvc_ctrl_cleanup_device(dev);
usb_put_intf(dev->intf);
usb_put_dev(dev->udev);
if (dev->vdev.dev)
v4l2_device_unregister(&dev->vdev);
#ifdef CONFIG_MEDIA_CONTROLLER
if (media_devnode_is_registered(dev->mdev.devnode))
media_device_unregister(&dev->mdev);
media_device_cleanup(&dev->mdev);
#endif
list_for_each_safe(p, n, &dev->chains) {
struct uvc_video_chain *chain;
chain = list_entry(p, struct uvc_video_chain, list);
kfree(chain);
}
list_for_each_safe(p, n, &dev->entities) {
struct uvc_entity *entity;
entity = list_entry(p, struct uvc_entity, list);
#ifdef CONFIG_MEDIA_CONTROLLER
uvc_mc_cleanup_entity(entity);
#endif
kfree(entity);
}
list_for_each_safe(p, n, &dev->streams) {
struct uvc_streaming *streaming;
streaming = list_entry(p, struct uvc_streaming, list);
usb_driver_release_interface(&uvc_driver.driver,
streaming->intf);
usb_put_intf(streaming->intf);
kfree(streaming->format);
kfree(streaming->header.bmaControls);
kfree(streaming);
}
kfree(dev);
}
static void uvc_release(struct video_device *vdev)
{
struct uvc_streaming *stream = video_get_drvdata(vdev);
struct uvc_device *dev = stream->dev;
kref_put(&dev->ref, uvc_delete);
}
/*
* Unregister the video devices.
*/
static void uvc_unregister_video(struct uvc_device *dev)
{
struct uvc_streaming *stream;
/* Unregistering all video devices might result in uvc_delete() being
* called from inside the loop if there's no open file handle. To avoid
* that, increment the refcount before iterating over the streams and
* decrement it when done.
*/
kref_get(&dev->ref);
list_for_each_entry(stream, &dev->streams, list) {
if (!video_is_registered(&stream->vdev))
continue;
video_unregister_device(&stream->vdev);
video_unregister_device(&stream->meta.vdev);
uvc_debugfs_cleanup_stream(stream);
}
kref_put(&dev->ref, uvc_delete);
}
int uvc_register_video_device(struct uvc_device *dev,
struct uvc_streaming *stream,
struct video_device *vdev,
struct uvc_video_queue *queue,
enum v4l2_buf_type type,
const struct v4l2_file_operations *fops,
const struct v4l2_ioctl_ops *ioctl_ops)
{
int ret;
/* Initialize the video buffers queue. */
ret = uvc_queue_init(queue, type, !uvc_no_drop_param);
if (ret)
return ret;
/* Register the device with V4L. */
/*
* We already hold a reference to dev->udev. The video device will be
* unregistered before the reference is released, so we don't need to
* get another one.
*/
vdev->v4l2_dev = &dev->vdev;
vdev->fops = fops;
vdev->ioctl_ops = ioctl_ops;
vdev->release = uvc_release;
vdev->prio = &stream->chain->prio;
if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
vdev->vfl_dir = VFL_DIR_TX;
else
vdev->vfl_dir = VFL_DIR_RX;
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
default:
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
break;
case V4L2_BUF_TYPE_META_CAPTURE:
vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
break;
}
strlcpy(vdev->name, dev->name, sizeof vdev->name);
/*
* Set the driver data before calling video_register_device, otherwise
* the file open() handler might race us.
*/
video_set_drvdata(vdev, stream);
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n",
v4l2_type_names[type], ret);
return ret;
}
kref_get(&dev->ref);
return 0;
}
static int uvc_register_video(struct uvc_device *dev,
struct uvc_streaming *stream)
{
int ret;
/* Initialize the streaming interface with default parameters. */
ret = uvc_video_init(stream);
if (ret < 0) {
uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n",
ret);
return ret;
}
if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_META_CAPTURE;
else
stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
uvc_debugfs_init_stream(stream);
/* Register the device with V4L. */
return uvc_register_video_device(dev, stream, &stream->vdev,
&stream->queue, stream->type,
&uvc_fops, &uvc_ioctl_ops);
}
/*
* Register all video devices in all chains.
*/
static int uvc_register_terms(struct uvc_device *dev,
struct uvc_video_chain *chain)
{
struct uvc_streaming *stream;
struct uvc_entity *term;
int ret;
list_for_each_entry(term, &chain->entities, chain) {
if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
continue;
stream = uvc_stream_by_id(dev, term->id);
if (stream == NULL) {
uvc_printk(KERN_INFO, "No streaming interface found "
"for terminal %u.", term->id);
continue;
}
stream->chain = chain;
ret = uvc_register_video(dev, stream);
if (ret < 0)
return ret;
/* Register a metadata node, but ignore a possible failure,
* complete registration of video nodes anyway.
*/
uvc_meta_register(stream);
term->vdev = &stream->vdev;
}
return 0;
}
static int uvc_register_chains(struct uvc_device *dev)
{
struct uvc_video_chain *chain;
int ret;
list_for_each_entry(chain, &dev->chains, list) {
ret = uvc_register_terms(dev, chain);
if (ret < 0)
return ret;
#ifdef CONFIG_MEDIA_CONTROLLER
ret = uvc_mc_register_entities(chain);
if (ret < 0) {
uvc_printk(KERN_INFO, "Failed to register entites "
"(%d).\n", ret);
}
#endif
}
return 0;
}
/* ------------------------------------------------------------------------
* USB probe, disconnect, suspend and resume
*/
struct uvc_device_info {
u32 quirks;
u32 meta_format;
};
static int uvc_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct uvc_device *dev;
const struct uvc_device_info *info =
(const struct uvc_device_info *)id->driver_info;
u32 quirks = info ? info->quirks : 0;
int function;
int ret;
if (id->idVendor && id->idProduct)
uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
"(%04x:%04x)\n", udev->devpath, id->idVendor,
id->idProduct);
else
uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
udev->devpath);
/* Allocate memory for the device and initialize it. */
if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
return -ENOMEM;
INIT_LIST_HEAD(&dev->entities);
INIT_LIST_HEAD(&dev->chains);
INIT_LIST_HEAD(&dev->streams);
kref_init(&dev->ref);
atomic_set(&dev->nmappings, 0);
mutex_init(&dev->lock);
dev->udev = usb_get_dev(udev);
dev->intf = usb_get_intf(intf);
dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
dev->quirks = (uvc_quirks_param == -1)
? quirks : uvc_quirks_param;
if (info)
dev->meta_format = info->meta_format;
if (udev->product != NULL)
strlcpy(dev->name, udev->product, sizeof dev->name);
else
snprintf(dev->name, sizeof dev->name,
"UVC Camera (%04x:%04x)",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
/*
* Add iFunction or iInterface to names when available as additional
* distinguishers between interfaces. iFunction is prioritized over
* iInterface which matches Windows behavior at the point of writing.
*/
if (intf->intf_assoc && intf->intf_assoc->iFunction != 0)
function = intf->intf_assoc->iFunction;
else
function = intf->cur_altsetting->desc.iInterface;
if (function != 0) {
size_t len;
strlcat(dev->name, ": ", sizeof(dev->name));
len = strlen(dev->name);
usb_string(udev, function, dev->name + len,
sizeof(dev->name) - len);
}
/* Parse the Video Class control descriptor. */
if (uvc_parse_control(dev) < 0) {
uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
"descriptors.\n");
goto error;
}
uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
dev->uvc_version >> 8, dev->uvc_version & 0xff,
udev->product ? udev->product : "<unnamed>",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
if (dev->quirks != quirks) {
uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
"parameter for testing purpose.\n", dev->quirks);
uvc_printk(KERN_INFO, "Please report required quirks to the "
"linux-uvc-devel mailing list.\n");
}
/* Initialize the media device and register the V4L2 device. */
#ifdef CONFIG_MEDIA_CONTROLLER
dev->mdev.dev = &intf->dev;
strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
if (udev->serial)
strlcpy(dev->mdev.serial, udev->serial,
sizeof(dev->mdev.serial));
strcpy(dev->mdev.bus_info, udev->devpath);
dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
media_device_init(&dev->mdev);
dev->vdev.mdev = &dev->mdev;
#endif
if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
goto error;
/* Initialize controls. */
if (uvc_ctrl_init_device(dev) < 0)
goto error;
/* Scan the device for video chains. */
if (uvc_scan_device(dev) < 0)
goto error;
/* Register video device nodes. */
if (uvc_register_chains(dev) < 0)
goto error;
#ifdef CONFIG_MEDIA_CONTROLLER
/* Register the media device node */
if (media_device_register(&dev->mdev) < 0)
goto error;
#endif
/* Save our data pointer in the interface data. */
usb_set_intfdata(intf, dev);
/* Initialize the interrupt URB. */
if ((ret = uvc_status_init(dev)) < 0) {
uvc_printk(KERN_INFO, "Unable to initialize the status "
"endpoint (%d), status interrupt will not be "
"supported.\n", ret);
}
uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
usb_enable_autosuspend(udev);
return 0;
error:
uvc_unregister_video(dev);
return -ENODEV;
}
static void uvc_disconnect(struct usb_interface *intf)
{
struct uvc_device *dev = usb_get_intfdata(intf);
/* Set the USB interface data to NULL. This can be done outside the
* lock, as there's no other reader.
*/
usb_set_intfdata(intf, NULL);
if (intf->cur_altsetting->desc.bInterfaceSubClass ==
UVC_SC_VIDEOSTREAMING)
return;
uvc_unregister_video(dev);
}
static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
{
struct uvc_device *dev = usb_get_intfdata(intf);
struct uvc_streaming *stream;
uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
intf->cur_altsetting->desc.bInterfaceNumber);
/* Controls are cached on the fly so they don't need to be saved. */
if (intf->cur_altsetting->desc.bInterfaceSubClass ==
UVC_SC_VIDEOCONTROL) {
mutex_lock(&dev->lock);
if (dev->users)
uvc_status_stop(dev);
mutex_unlock(&dev->lock);
return 0;
}
list_for_each_entry(stream, &dev->streams, list) {
if (stream->intf == intf)
return uvc_video_suspend(stream);
}
uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
"mismatch.\n");
return -EINVAL;
}
static int __uvc_resume(struct usb_interface *intf, int reset)
{
struct uvc_device *dev = usb_get_intfdata(intf);
struct uvc_streaming *stream;
int ret = 0;
uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
intf->cur_altsetting->desc.bInterfaceNumber);
if (intf->cur_altsetting->desc.bInterfaceSubClass ==
UVC_SC_VIDEOCONTROL) {
if (reset) {
ret = uvc_ctrl_restore_values(dev);
if (ret < 0)
return ret;
}
mutex_lock(&dev->lock);
if (dev->users)
ret = uvc_status_start(dev, GFP_NOIO);
mutex_unlock(&dev->lock);
return ret;
}
list_for_each_entry(stream, &dev->streams, list) {
if (stream->intf == intf) {
ret = uvc_video_resume(stream, reset);
if (ret < 0)
uvc_queue_streamoff(&stream->queue,
stream->queue.queue.type);
return ret;
}
}
uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
"mismatch.\n");
return -EINVAL;
}
static int uvc_resume(struct usb_interface *intf)
{
return __uvc_resume(intf, 0);
}
static int uvc_reset_resume(struct usb_interface *intf)
{
return __uvc_resume(intf, 1);
}
/* ------------------------------------------------------------------------
* Module parameters
*/
static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp)
{
if (uvc_clock_param == CLOCK_MONOTONIC)
return sprintf(buffer, "CLOCK_MONOTONIC");
else
return sprintf(buffer, "CLOCK_REALTIME");
}
static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
{
if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
val += strlen("clock_");
if (strcasecmp(val, "monotonic") == 0)
uvc_clock_param = CLOCK_MONOTONIC;
else if (strcasecmp(val, "realtime") == 0)
uvc_clock_param = CLOCK_REALTIME;
else
return -EINVAL;
return 0;
}
module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
&uvc_clock_param, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(quirks, "Forced device quirks");
module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(trace, "Trace level bitmask");
module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
/* ------------------------------------------------------------------------
* Driver initialization and cleanup
*/
static const struct uvc_device_info uvc_quirk_probe_minmax = {
.quirks = UVC_QUIRK_PROBE_MINMAX,
};
static const struct uvc_device_info uvc_quirk_fix_bandwidth = {
.quirks = UVC_QUIRK_FIX_BANDWIDTH,
};
static const struct uvc_device_info uvc_quirk_probe_def = {
.quirks = UVC_QUIRK_PROBE_DEF,
};
static const struct uvc_device_info uvc_quirk_stream_no_fid = {
.quirks = UVC_QUIRK_STREAM_NO_FID,
};
static const struct uvc_device_info uvc_quirk_force_y8 = {
.quirks = UVC_QUIRK_FORCE_Y8,
};
#define UVC_QUIRK_INFO(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
/*
* The Logitech cameras listed below have their interface class set to
* VENDOR_SPEC because they don't announce themselves as UVC devices, even
* though they are compliant.
*/
static const struct usb_device_id uvc_ids[] = {
/* LogiLink Wireless Webcam */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0416,
.idProduct = 0xa91a,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Genius eFace 2025 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0458,
.idProduct = 0x706e,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Microsoft Lifecam NX-6000 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x045e,
.idProduct = 0x00f8,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Microsoft Lifecam NX-3000 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x045e,
.idProduct = 0x0721,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Microsoft Lifecam VX-7000 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x045e,
.idProduct = 0x0723,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Logitech Quickcam Fusion */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x08c1,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Logitech Quickcam Orbit MP */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x08c2,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Logitech Quickcam Pro for Notebook */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x08c3,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Logitech Quickcam Pro 5000 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x08c5,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Logitech Quickcam OEM Dell Notebook */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x08c6,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Logitech Quickcam OEM Cisco VT Camera II */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x08c7,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Logitech HD Pro Webcam C920 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x082d,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) },
/* Chicony CNF7129 (Asus EEE 100HE) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x04f2,
.idProduct = 0xb071,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTRICT_FRAME_RATE) },
/* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x058f,
.idProduct = 0x3820,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Dell XPS m1530 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05a9,
.idProduct = 0x2640,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Dell SP2008WFP Monitor */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05a9,
.idProduct = 0x2641,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Dell Alienware X51 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05a9,
.idProduct = 0x2643,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Dell Studio Hybrid 140g (OmniVision webcam) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05a9,
.idProduct = 0x264a,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Dell XPS M1330 (OmniVision OV7670 webcam) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05a9,
.idProduct = 0x7670,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Apple Built-In iSight */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05ac,
.idProduct = 0x8501,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_BUILTIN_ISIGHT) },
/* Apple Built-In iSight via iBridge */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05ac,
.idProduct = 0x8600,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* Foxlink ("HP Webcam" on HP Mini 5103) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05c8,
.idProduct = 0x0403,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
/* Genesys Logic USB 2.0 PC Camera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x05e3,
.idProduct = 0x0505,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Hercules Classic Silver */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x06f8,
.idProduct = 0x300c,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
/* ViMicro Vega */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0ac8,
.idProduct = 0x332d,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
/* ViMicro - Minoru3D */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0ac8,
.idProduct = 0x3410,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
/* ViMicro Venus - Minoru3D */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0ac8,
.idProduct = 0x3420,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth },
/* Ophir Optronics - SPCAM 620U */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0bd3,
.idProduct = 0x0555,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* MT6227 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x0e8d,
.idProduct = 0x0004,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_PROBE_DEF) },
/* IMC Networks (Medion Akoya) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x13d3,
.idProduct = 0x5103,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* JMicron USB2.0 XGA WebCam */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x152d,
.idProduct = 0x0310,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Syntek (HP Spartan) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
.idProduct = 0x5212,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Syntek (Samsung Q310) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
.idProduct = 0x5931,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Syntek (Packard Bell EasyNote MX52 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
.idProduct = 0x8a12,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Syntek (Asus F9SG) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
.idProduct = 0x8a31,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Syntek (Asus U3S) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
.idProduct = 0x8a33,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Syntek (JAOtech Smart Terminal) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x174f,
.idProduct = 0x8a34,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Miricle 307K */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x17dc,
.idProduct = 0x0202,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Lenovo Thinkpad SL400/SL500 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x17ef,
.idProduct = 0x480b,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid },
/* Aveo Technology USB 2.0 Camera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x1871,
.idProduct = 0x0306,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_PROBE_EXTRAFIELDS) },
/* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x1871,
.idProduct = 0x0516,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Ecamm Pico iMage */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x18cd,
.idProduct = 0xcafe,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_EXTRAFIELDS) },
/* Manta MM-353 Plako */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x18ec,
.idProduct = 0x3188,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* FSC WebCam V30S */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x18ec,
.idProduct = 0x3288,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Arkmicro unbranded */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x18ec,
.idProduct = 0x3290,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_def },
/* The Imaging Source USB CCD cameras */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x199e,
.idProduct = 0x8102,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0 },
/* Bodelin ProScopeHR */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_DEV_HI
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x19ab,
.idProduct = 0x1000,
.bcdDevice_hi = 0x0126,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_STATUS_INTERVAL) },
/* MSI StarCam 370i */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x1b3b,
.idProduct = 0x2951,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* SiGma Micro USB Web Camera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x1c4f,
.idProduct = 0x3000,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX
| UVC_QUIRK_IGNORE_SELECTOR_UNIT) },
/* Oculus VR Positional Tracker DK2 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x2833,
.idProduct = 0x0201,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
/* Oculus VR Rift Sensor */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x2833,
.idProduct = 0x0211,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 },
/* Generic USB Video Class */
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) },
{ USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) },
{}
};
MODULE_DEVICE_TABLE(usb, uvc_ids);
struct uvc_driver uvc_driver = {
.driver = {
.name = "uvcvideo",
.probe = uvc_probe,
.disconnect = uvc_disconnect,
.suspend = uvc_suspend,
.resume = uvc_resume,
.reset_resume = uvc_reset_resume,
.id_table = uvc_ids,
.supports_autosuspend = 1,
},
};
static int __init uvc_init(void)
{
int ret;
uvc_debugfs_init();
ret = usb_register(&uvc_driver.driver);
if (ret < 0) {
uvc_debugfs_cleanup();
return ret;
}
printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
return 0;
}
static void __exit uvc_cleanup(void)
{
usb_deregister(&uvc_driver.driver);
uvc_debugfs_cleanup();
}
module_init(uvc_init);
module_exit(uvc_cleanup);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_VERSION(DRIVER_VERSION);
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