/* * 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 #include #include #include #include #include #include #include #include #include #include "uvcvideo.h" #define DRIVER_AUTHOR "Laurent Pinchart " #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; /* ------------------------------------------------------------------------ * 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 TT_STREAMING: if (entity->output.bSourceID == id) return entity; break; case VC_PROCESSING_UNIT: if (entity->processing.bSourceID == id) return entity; break; case VC_SELECTOR_UNIT: for (i = 0; i < entity->selector.bNrInPins; ++i) if (entity->selector.baSourceID[i] == id) return entity; break; case VC_EXTENSION_UNIT: for (i = 0; i < entity->extension.bNrInPins; ++i) if (entity->extension.baSourceID[i] == id) return entity; break; } } return NULL; } /* ------------------------------------------------------------------------ * Descriptors handling */ 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 char *_buffer; unsigned int interval; unsigned int i, n; int _buflen; __u8 ftype; format->type = buffer[2]; format->index = buffer[3]; switch (buffer[2]) { case VS_FORMAT_UNCOMPRESSED: case VS_FORMAT_FRAME_BASED: n = buffer[2] == 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] == VS_FORMAT_UNCOMPRESSED) { ftype = VS_FRAME_UNCOMPRESSED; } else { ftype = VS_FRAME_FRAME_BASED; if (buffer[27]) format->flags = UVC_FMT_FLAG_COMPRESSED; } break; case 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 = VS_FRAME_MJPEG; break; case 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 VS_FORMAT_MPEG2TS: case 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]; /* Count the number of frame descriptors to test the bFrameIndex * field when parsing the descriptors. We can't rely on the * bNumFrameDescriptors field as some cameras don't initialize it * properly. */ for (_buflen = buflen, _buffer = buffer; _buflen > 2 && _buffer[2] == ftype; _buflen -= _buffer[0], _buffer += _buffer[0]) format->nframes++; /* Parse the frame descriptors. Only uncompressed, MJPEG and frame * based formats have frame descriptors. */ while (buflen > 2 && buffer[2] == ftype) { if (ftype != 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; } if (buffer[3] - 1 >= format->nframes) { uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" "interface %d frame index %u out of range\n", dev->udev->devnum, alts->desc.bInterfaceNumber, buffer[3]); return -EINVAL; } frame = &format->frame[buffer[3] - 1]; 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 != 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); buflen -= buffer[0]; buffer += buffer[0]; } if (buflen > 2 && buffer[2] == VS_STILL_IMAGE_FRAME) { buflen -= buffer[0]; buffer += buffer[0]; } if (buflen > 2 && buffer[2] == 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 != 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->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 VS_OUTPUT_HEADER: streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; size = 9; break; case 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] == 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) { switch (_buffer[2]) { case VS_FORMAT_UNCOMPRESSED: case VS_FORMAT_MJPEG: case VS_FORMAT_FRAME_BASED: nformats++; break; case 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 VS_FORMAT_MPEG2TS: case 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 VS_FRAME_UNCOMPRESSED: case VS_FRAME_MJPEG: nframes++; if (_buflen > 25) nintervals += _buffer[25] ? _buffer[25] : 3; break; case 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) { switch (buffer[2]) { case VS_FORMAT_UNCOMPRESSED: case VS_FORMAT_MJPEG: case VS_FORMAT_DV: case 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]; } /* 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->streaming); 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 = VC_EXTENSION_UNIT; memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; unit->extension.bNrInPins = get_unaligned_le16(&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 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 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 == ITT_CAMERA) { n = buflen >= 15 ? buffer[14] : 0; len = 15; } else if (type == 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) == 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) == 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) == ITT_CAMERA) sprintf(term->name, "Camera %u", buffer[3]); else if (UVC_ENTITY_TYPE(term) == 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 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 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 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 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 = get_unaligned_le16(&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; } /* ------------------------------------------------------------------------ * USB probe and disconnect */ /* * Unregister the video devices. */ static void uvc_unregister_video(struct uvc_device *dev) { if (dev->video.vdev) { if (dev->video.vdev->minor == -1) video_device_release(dev->video.vdev); else video_unregister_device(dev->video.vdev); dev->video.vdev = NULL; } } /* * Scan the UVC descriptors to locate a chain starting at an Output Terminal * and containing the following units: * * - one Output Terminal (USB Streaming or Display) * - zero or one Processing Unit * - zero, one or mode 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) * * A side forward scan is made on each detected entity to check for additional * extension units. */ static int uvc_scan_chain_entity(struct uvc_video_device *video, struct uvc_entity *entity) { switch (UVC_ENTITY_TYPE(entity)) { case 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; } list_add_tail(&entity->chain, &video->extensions); break; case VC_PROCESSING_UNIT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- PU %d", entity->id); if (video->processing != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple " "Processing Units in chain.\n"); return -1; } video->processing = entity; break; case 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 (video->selector != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " "Units in chain.\n"); return -1; } video->selector = entity; break; case ITT_VENDOR_SPECIFIC: case ITT_CAMERA: case ITT_MEDIA_TRANSPORT_INPUT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- IT %d\n", entity->id); list_add_tail(&entity->chain, &video->iterms); break; case 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; } if (video->sterm != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple streaming " "entities in chain.\n"); return -1; } list_add_tail(&entity->chain, &video->iterms); video->sterm = entity; break; default: uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); return -1; } return 0; } static int uvc_scan_chain_forward(struct uvc_video_device *video, 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(video->dev, entity->id, forward); if (forward == NULL) break; if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT || forward == prev) continue; if (forward->extension.bNrInPins != 1) { uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has" "more than 1 input pin.\n", entity->id); return -1; } list_add_tail(&forward->chain, &video->extensions); if (uvc_trace_param & UVC_TRACE_PROBE) { if (!found) printk(" (-> XU"); printk(" %d", forward->id); found = 1; } } if (found) printk(")"); return 0; } static int uvc_scan_chain_backward(struct uvc_video_device *video, struct uvc_entity *entity) { struct uvc_entity *term; int id = -1, i; switch (UVC_ENTITY_TYPE(entity)) { case VC_EXTENSION_UNIT: id = entity->extension.baSourceID[0]; break; case VC_PROCESSING_UNIT: id = entity->processing.bSourceID; break; case 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"); video->selector = entity; for (i = 0; i < entity->selector.bNrInPins; ++i) { id = entity->selector.baSourceID[i]; term = uvc_entity_by_id(video->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, &video->iterms); uvc_scan_chain_forward(video, term, entity); } if (uvc_trace_param & UVC_TRACE_PROBE) printk("\n"); id = 0; break; } return id; } static int uvc_scan_chain(struct uvc_video_device *video) { struct uvc_entity *entity, *prev; int id; entity = video->oterm; uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id); if (UVC_ENTITY_TYPE(entity) == TT_STREAMING) video->sterm = entity; id = entity->output.bSourceID; while (id != 0) { prev = entity; entity = uvc_entity_by_id(video->dev, id); if (entity == NULL) { uvc_trace(UVC_TRACE_DESCR, "Found reference to " "unknown entity %d.\n", id); return -1; } /* Process entity */ if (uvc_scan_chain_entity(video, entity) < 0) return -1; /* Forward scan */ if (uvc_scan_chain_forward(video, entity, prev) < 0) return -1; /* Stop when a terminal is found. */ if (!UVC_ENTITY_IS_UNIT(entity)) break; /* Backward scan */ id = uvc_scan_chain_backward(video, entity); if (id < 0) return id; } if (video->sterm == NULL) { uvc_trace(UVC_TRACE_DESCR, "No streaming entity found in " "chain.\n"); return -1; } return 0; } /* * Register the video devices. * * The driver currently supports a single video device per control interface * only. The terminal and units must match the following structure: * * ITT_* -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING * TT_STREAMING -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> OTT_* * * The Extension Units, if present, must have a single input pin. 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. */ static int uvc_register_video(struct uvc_device *dev) { struct video_device *vdev; struct uvc_entity *term; int found = 0, ret; /* Check if the control interface matches the structure we expect. */ list_for_each_entry(term, &dev->entities, list) { struct uvc_streaming *streaming; if (!UVC_ENTITY_IS_TERM(term) || !UVC_ENTITY_IS_OTERM(term)) continue; memset(&dev->video, 0, sizeof dev->video); mutex_init(&dev->video.ctrl_mutex); INIT_LIST_HEAD(&dev->video.iterms); INIT_LIST_HEAD(&dev->video.extensions); dev->video.oterm = term; dev->video.dev = dev; if (uvc_scan_chain(&dev->video) < 0) continue; list_for_each_entry(streaming, &dev->streaming, list) { if (streaming->header.bTerminalLink == dev->video.sterm->id) { dev->video.streaming = streaming; found = 1; break; } } if (found) break; } if (!found) { uvc_printk(KERN_INFO, "No valid video chain found.\n"); return -1; } if (uvc_trace_param & UVC_TRACE_PROBE) { uvc_printk(KERN_INFO, "Found a valid video chain ("); list_for_each_entry(term, &dev->video.iterms, chain) { printk("%d", term->id); if (term->chain.next != &dev->video.iterms) printk(","); } printk(" -> %d).\n", dev->video.oterm->id); } /* Initialize the video buffers queue. */ uvc_queue_init(&dev->video.queue, dev->video.streaming->type); /* Initialize the streaming interface with default streaming * parameters. */ if ((ret = uvc_video_init(&dev->video)) < 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) return -1; /* 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 = video_device_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. */ dev->video.vdev = vdev; video_set_drvdata(vdev, &dev->video); if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) { dev->video.vdev = NULL; video_device_release(vdev); return -1; } return 0; } /* * Delete the UVC device. * * Called by the kernel when the last reference to the uvc_device structure * is released. * * Unregistering the video devices is done here because every opened instance * must be closed before the device can be unregistered. An alternative would * have been to use another reference count for uvc_v4l2_open/uvc_release, and * unregister the video devices on disconnect when that reference count drops * to zero. * * 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. */ void uvc_delete(struct kref *kref) { struct uvc_device *dev = container_of(kref, struct uvc_device, kref); struct list_head *p, *n; /* Unregister the video device. */ uvc_unregister_video(dev); 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->entities) { struct uvc_entity *entity; entity = list_entry(p, struct uvc_entity, list); kfree(entity); } list_for_each_safe(p, n, &dev->streaming) { 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 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->streaming); kref_init(&dev->kref); 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 : "", 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; /* Register the video devices. */ if (uvc_register_video(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: kref_put(&dev->kref, uvc_delete); 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 == SC_VIDEOSTREAMING) return; /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide * lock is needed to prevent uvc_disconnect from releasing its * reference to the uvc_device instance after uvc_v4l2_open() received * the pointer to the device (video_devdata) but before it got the * chance to increase the reference count (kref_get). * * Note that the reference can't be released with the lock held, * otherwise a AB-BA deadlock can occur with videodev_lock that * videodev acquires in videodev_open() and video_unregister_device(). */ mutex_lock(&uvc_driver.open_mutex); dev->state |= UVC_DEV_DISCONNECTED; mutex_unlock(&uvc_driver.open_mutex); kref_put(&dev->kref, uvc_delete); } static int uvc_suspend(struct usb_interface *intf, pm_message_t message) { struct uvc_device *dev = usb_get_intfdata(intf); 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 == SC_VIDEOCONTROL) return uvc_status_suspend(dev); if (dev->video.streaming->intf != intf) { uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB " "interface mismatch.\n"); return -EINVAL; } return uvc_video_suspend(&dev->video); } static int __uvc_resume(struct usb_interface *intf, int reset) { struct uvc_device *dev = usb_get_intfdata(intf); int ret; uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", intf->cur_altsetting->desc.bInterfaceNumber); if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) { if (reset && (ret = uvc_ctrl_resume_device(dev)) < 0) return ret; return uvc_status_resume(dev); } if (dev->video.streaming->intf != intf) { uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB " "interface mismatch.\n"); return -EINVAL; } return uvc_video_resume(&dev->video); } 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[] = { /* 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 }, /* 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 }, /* 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 }, /* Lenovo Thinkpad 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 }, /* 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 }, /* 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 }, /* 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 | UVC_QUIRK_PRUNE_CONTROLS }, /* 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.open_mutex); 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_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_VERSION(DRIVER_VERSION);