| /* |
| * uvc_driver.c -- USB Video Class driver |
| * |
| * Copyright (C) 2005-2009 |
| * Laurent Pinchart (laurent.pinchart@skynet.be) |
| * |
| * 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/kernel.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/usb.h> |
| #include <linux/videodev2.h> |
| #include <linux/vmalloc.h> |
| #include <linux/wait.h> |
| #include <asm/atomic.h> |
| #include <asm/unaligned.h> |
| |
| #include <media/v4l2-common.h> |
| |
| #include "uvcvideo.h" |
| |
| #define DRIVER_AUTHOR "Laurent Pinchart <laurent.pinchart@skynet.be>" |
| #define DRIVER_DESC "USB Video Class driver" |
| #ifndef DRIVER_VERSION |
| #define DRIVER_VERSION "v0.1.0" |
| #endif |
| |
| unsigned int uvc_no_drop_param; |
| static unsigned int uvc_quirks_param; |
| 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 4:2:0 (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 4:2:2 (UYVY)", |
| .guid = UVC_GUID_FORMAT_UYVY, |
| .fcc = V4L2_PIX_FMT_UYVY, |
| }, |
| { |
| .name = "Greyscale", |
| .guid = UVC_GUID_FORMAT_Y800, |
| .fcc = V4L2_PIX_FMT_GREY, |
| }, |
| { |
| .name = "RGB Bayer", |
| .guid = UVC_GUID_FORMAT_BY8, |
| .fcc = V4L2_PIX_FMT_SBGGR8, |
| }, |
| }; |
| |
| /* ------------------------------------------------------------------------ |
| * 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 |
| */ |
| |
| static 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) { |
| switch (UVC_ENTITY_TYPE(entity)) { |
| case UVC_TT_STREAMING: |
| if (entity->output.bSourceID == id) |
| return entity; |
| break; |
| |
| case UVC_VC_PROCESSING_UNIT: |
| if (entity->processing.bSourceID == id) |
| return entity; |
| break; |
| |
| case UVC_VC_SELECTOR_UNIT: |
| for (i = 0; i < entity->selector.bNrInPins; ++i) |
| if (entity->selector.baSourceID[i] == id) |
| return entity; |
| break; |
| |
| case UVC_VC_EXTENSION_UNIT: |
| for (i = 0; i < entity->extension.bNrInPins; ++i) |
| if (entity->extension.baSourceID[i] == id) |
| return entity; |
| break; |
| } |
| } |
| |
| 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 " |
| UVC_GUID_FORMAT "\n", |
| UVC_GUID_ARGS(&buffer[5])); |
| snprintf(format->name, sizeof format->name, |
| UVC_GUID_FORMAT, UVC_GUID_ARGS(&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)); |
| |
| 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 = kmalloc(p*n, GFP_KERNEL); |
| if (streaming->header.bmaControls == NULL) { |
| ret = -ENOMEM; |
| goto error; |
| } |
| |
| memcpy(streaming->header.bmaControls, &buffer[size], p*n); |
| |
| 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; |
| } |
| |
| /* 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 = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL); |
| if (unit == NULL) |
| return -ENOMEM; |
| |
| unit->id = buffer[3]; |
| unit->type = UVC_VC_EXTENSION_UNIT; |
| memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); |
| unit->extension.bNumControls = buffer[20]; |
| unit->extension.bNrInPins = buffer[21]; |
| unit->extension.baSourceID = (__u8 *)unit + sizeof *unit; |
| memcpy(unit->extension.baSourceID, &buffer[22], p); |
| unit->extension.bControlSize = buffer[22+p]; |
| unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p; |
| unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit |
| + p + 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 = kzalloc(sizeof *term + n + p, GFP_KERNEL); |
| if (term == NULL) |
| return -ENOMEM; |
| |
| term->id = buffer[3]; |
| term->type = type | UVC_TERM_INPUT; |
| |
| 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 = kzalloc(sizeof *term, GFP_KERNEL); |
| if (term == NULL) |
| return -ENOMEM; |
| |
| term->id = buffer[3]; |
| term->type = type | UVC_TERM_OUTPUT; |
| term->output.bSourceID = buffer[7]; |
| |
| 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 = kzalloc(sizeof *unit + p, GFP_KERNEL); |
| if (unit == NULL) |
| return -ENOMEM; |
| |
| unit->id = buffer[3]; |
| unit->type = buffer[2]; |
| unit->selector.bNrInPins = buffer[4]; |
| unit->selector.baSourceID = (__u8 *)unit + sizeof *unit; |
| memcpy(unit->selector.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 = kzalloc(sizeof *unit + n, GFP_KERNEL); |
| if (unit == NULL) |
| return -ENOMEM; |
| |
| unit->id = buffer[3]; |
| unit->type = buffer[2]; |
| unit->processing.bSourceID = buffer[4]; |
| 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 = kzalloc(sizeof *unit + p + n, GFP_KERNEL); |
| if (unit == NULL) |
| return -ENOMEM; |
| |
| unit->id = buffer[3]; |
| unit->type = buffer[2]; |
| memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); |
| unit->extension.bNumControls = buffer[20]; |
| unit->extension.bNrInPins = buffer[21]; |
| unit->extension.baSourceID = (__u8 *)unit + sizeof *unit; |
| memcpy(unit->extension.baSourceID, &buffer[22], p); |
| unit->extension.bControlSize = buffer[22+p]; |
| unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p; |
| 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->extension.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->selector.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_TT_STREAMING: |
| if (uvc_trace_param & UVC_TRACE_PROBE) |
| printk(" <- IT %d\n", entity->id); |
| |
| if (!UVC_ENTITY_IS_ITERM(entity)) { |
| uvc_trace(UVC_TRACE_DESCR, "Unsupported input " |
| "terminal %u.\n", entity->id); |
| return -1; |
| } |
| |
| 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->extension.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 *term; |
| int id = -1, i; |
| |
| switch (UVC_ENTITY_TYPE(entity)) { |
| case UVC_VC_EXTENSION_UNIT: |
| id = entity->extension.baSourceID[0]; |
| break; |
| |
| case UVC_VC_PROCESSING_UNIT: |
| id = entity->processing.bSourceID; |
| break; |
| |
| case UVC_VC_SELECTOR_UNIT: |
| /* Single-input selector units are ignored. */ |
| if (entity->selector.bNrInPins == 1) { |
| id = entity->selector.baSourceID[0]; |
| break; |
| } |
| |
| if (uvc_trace_param & UVC_TRACE_PROBE) |
| printk(" <- IT"); |
| |
| chain->selector = entity; |
| for (i = 0; i < entity->selector.bNrInPins; ++i) { |
| id = entity->selector.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; |
| } |
| |
| return id; |
| } |
| |
| static int uvc_scan_chain(struct uvc_video_chain *chain, |
| struct uvc_entity *oterm) |
| { |
| struct uvc_entity *entity, *prev; |
| int id; |
| |
| entity = oterm; |
| list_add_tail(&entity->chain, &chain->entities); |
| uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id); |
| |
| id = entity->output.bSourceID; |
| while (id != 0) { |
| prev = entity; |
| 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; |
| } |
| |
| if (entity->chain.next || entity->chain.prev) { |
| uvc_trace(UVC_TRACE_DESCR, "Found reference to " |
| "entity %d already in chain.\n", 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; |
| |
| /* Stop when a terminal is found. */ |
| if (UVC_ENTITY_IS_TERM(entity)) |
| break; |
| |
| /* Backward scan */ |
| id = uvc_scan_chain_backward(chain, entity); |
| if (id < 0) |
| return id; |
| } |
| |
| 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); |
| |
| 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); |
| 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; |
| |
| video_device_release(vdev); |
| |
| /* 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; |
| } |
| |
| /* 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; |
| } |
| |
| /* 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->parent = &dev->intf->dev; |
| vdev->minor = -1; |
| 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; |
| } |
| |
| 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; |
| } |
| |
| 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); |
| |
| dev->udev = usb_get_dev(udev); |
| dev->intf = usb_get_intf(intf); |
| dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; |
| dev->quirks = 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 (uvc_quirks_param != 0) { |
| uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module " |
| "parameter for testing purpose.\n", uvc_quirks_param); |
| uvc_printk(KERN_INFO, "Please report required quirks to the " |
| "linux-uvc-devel mailing list.\n"); |
| } |
| |
| /* 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 devices. */ |
| 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"); |
| 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); |
| } |
| |
| 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); |
| } |
| |
| /* ------------------------------------------------------------------------ |
| * 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[] = { |
| /* 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 }, |
| /* 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 }, |
| /* 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 }, |
| /* 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 }, |
| /* 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 }, |
| /* 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 }, |
| /* 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 (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 }, |
| /* 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 }, |
| /* 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 }, |
| /* 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 result; |
| |
| INIT_LIST_HEAD(&uvc_driver.devices); |
| INIT_LIST_HEAD(&uvc_driver.controls); |
| mutex_init(&uvc_driver.ctrl_mutex); |
| |
| uvc_ctrl_init(); |
| |
| result = usb_register(&uvc_driver.driver); |
| if (result == 0) |
| printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); |
| return result; |
| } |
| |
| static void __exit uvc_cleanup(void) |
| { |
| usb_deregister(&uvc_driver.driver); |
| } |
| |
| module_init(uvc_init); |
| module_exit(uvc_cleanup); |
| |
| 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"); |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRIVER_VERSION); |
| |