diff options
Diffstat (limited to 'drivers/media/usb/uvc/uvc_driver.c')
| -rw-r--r-- | drivers/media/usb/uvc/uvc_driver.c | 2472 |
1 files changed, 2472 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c new file mode 100644 index 000000000000..45d7aa162d9d --- /dev/null +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -0,0 +1,2472 @@ +/* + * 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. + * + */ + +/* + * This driver aims to support video input and ouput devices compliant with the + * 'USB Video Class' specification. + * + * The driver doesn't support the deprecated v4l1 interface. It implements the + * mmap capture method only, and doesn't do any image format conversion in + * software. If your user-space application doesn't support YUYV or MJPEG, fix + * it :-). Please note that the MJPEG data have been stripped from their + * Huffman tables (DHT marker), you will need to add it back if your JPEG + * codec can't handle MJPEG data. + */ + +#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 "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_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 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 = "RGB Bayer", + .guid = UVC_GUID_FORMAT_BY8, + .fcc = V4L2_PIX_FMT_SBGGR8, + }, + { + .name = "RGB565", + .guid = UVC_GUID_FORMAT_RGBP, + .fcc = V4L2_PIX_FMT_RGB565, + }, + { + .name = "H.264", + .guid = UVC_GUID_FORMAT_H264, + .fcc = V4L2_PIX_FMT_H264, + }, +}; + +/* ------------------------------------------------------------------------ + * 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 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]; + 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]); + 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 || 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(" <- 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(" <- 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(" <- 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(" <- 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(" OT %d", entity->id); + + break; + + case UVC_TT_STREAMING: + if (UVC_ENTITY_IS_ITERM(entity)) { + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" <- IT %d\n", entity->id); + } else { + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" 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(" (->"); + + printk(" 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(" (->"); + + printk(" OT %d", forward->id); + found = 1; + } + break; + } + } + if (found) + printk(")"); + + 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(" <- 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(" %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("\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; +} + +/* + * 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 = kzalloc(sizeof(*chain), GFP_KERNEL); + if (chain == NULL) + return -ENOMEM; + + INIT_LIST_HEAD(&chain->entities); + mutex_init(&chain->ctrl_mutex); + chain->dev = dev; + + 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_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 uvc_device *dev) +{ + struct list_head *p, *n; + + usb_put_intf(dev->intf); + usb_put_dev(dev->udev); + + uvc_status_cleanup(dev); + uvc_ctrl_cleanup_device(dev); + + 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); +#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 + if (entity->vdev) { + video_device_release(entity->vdev); + entity->vdev = NULL; + } + 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; + + /* Decrement the registered streams count and delete the device when it + * reaches zero. + */ + if (atomic_dec_and_test(&dev->nstreams)) + uvc_delete(dev); +} + +/* + * 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 stream count before iterating over the streams + * and decrement it when done. + */ + atomic_inc(&dev->nstreams); + + list_for_each_entry(stream, &dev->streams, list) { + if (stream->vdev == NULL) + continue; + + video_unregister_device(stream->vdev); + stream->vdev = NULL; + + uvc_debugfs_cleanup_stream(stream); + } + + /* Decrement the stream count and call uvc_delete explicitly if there + * are no stream left. + */ + if (atomic_dec_and_test(&dev->nstreams)) + uvc_delete(dev); +} + +static int uvc_register_video(struct uvc_device *dev, + struct uvc_streaming *stream) +{ + struct video_device *vdev; + int ret; + + /* Initialize the streaming interface with default streaming + * parameters. + */ + ret = uvc_video_init(stream); + if (ret < 0) { + uvc_printk(KERN_ERR, "Failed to initialize the device " + "(%d).\n", ret); + return ret; + } + + uvc_debugfs_init_stream(stream); + + /* Register the device with V4L. */ + vdev = video_device_alloc(); + if (vdev == NULL) { + uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n", + ret); + return -ENOMEM; + } + + /* 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 = &uvc_fops; + vdev->release = uvc_release; + strlcpy(vdev->name, dev->name, sizeof vdev->name); + + /* Set the driver data before calling video_register_device, otherwise + * uvc_v4l2_open might race us. + */ + stream->vdev = vdev; + video_set_drvdata(vdev, stream); + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + uvc_printk(KERN_ERR, "Failed to register video device (%d).\n", + ret); + stream->vdev = NULL; + video_device_release(vdev); + return ret; + } + + atomic_inc(&dev->nstreams); + return 0; +} + +/* + * 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; + + 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 + */ + +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; + 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); + atomic_set(&dev->nstreams, 0); + atomic_set(&dev->users, 0); + atomic_set(&dev->nmappings, 0); + + 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) + ? id->driver_info : uvc_quirks_param; + + 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)); + + /* 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 != id->driver_info) { + 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"); + } + + /* Register the media and V4L2 devices. */ +#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); + dev->mdev.driver_version = LINUX_VERSION_CODE; + if (media_device_register(&dev->mdev) < 0) + goto error; + + 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; + + /* 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; + + dev->state |= UVC_DEV_DISCONNECTED; + + 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) + return uvc_status_suspend(dev); + + 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; + + 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) { + int ret = uvc_ctrl_resume_device(dev); + + if (ret < 0) + return ret; + } + + return uvc_status_resume(dev); + } + + list_for_each_entry(stream, &dev->streams, list) { + if (stream->intf == intf) + return uvc_video_resume(stream, reset); + } + + 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, 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, 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(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 + */ + +/* + * 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 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 = 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 = 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 = UVC_QUIRK_PROBE_MINMAX }, + /* 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 = 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 }, + /* 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_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 = 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 = 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_PROBE_MINMAX + | UVC_QUIRK_BUILTIN_ISIGHT }, + /* 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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_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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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 = 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_PROBE_MINMAX + | UVC_QUIRK_PROBE_EXTRAFIELDS }, + /* 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_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 = 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 = 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 = 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_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 = 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_PROBE_MINMAX + | UVC_QUIRK_IGNORE_SELECTOR_UNIT }, + /* Generic USB Video Class */ + { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) }, + {} +}; + +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); + |