2010-05-02 12:57:42 -06:00
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/*
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* webcam.c -- USB webcam gadget driver
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*
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* Copyright (C) 2009-2010
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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2011-09-09 08:10:44 -06:00
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2010-05-02 12:57:42 -06:00
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/usb/video.h>
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#include "f_uvc.h"
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/*
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* Kbuild is not very cooperative with respect to linking separately
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* compiled library objects into one module. So for now we won't use
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* separate compilation ... ensuring init/exit sections work to shrink
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* the runtime footprint, and giving us at least some parts of what
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* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
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*/
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#include "composite.c"
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#include "usbstring.c"
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#include "config.c"
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#include "epautoconf.c"
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#include "uvc_queue.c"
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#include "uvc_video.c"
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2010-07-10 13:13:05 -06:00
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#include "uvc_v4l2.c"
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#include "f_uvc.c"
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2010-05-02 12:57:42 -06:00
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/* --------------------------------------------------------------------------
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* Device descriptor
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*/
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#define WEBCAM_VENDOR_ID 0x1d6b /* Linux Foundation */
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#define WEBCAM_PRODUCT_ID 0x0102 /* Webcam A/V gadget */
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#define WEBCAM_DEVICE_BCD 0x0010 /* 0.10 */
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static char webcam_vendor_label[] = "Linux Foundation";
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static char webcam_product_label[] = "Webcam gadget";
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static char webcam_config_label[] = "Video";
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/* string IDs are assigned dynamically */
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#define STRING_MANUFACTURER_IDX 0
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#define STRING_PRODUCT_IDX 1
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#define STRING_DESCRIPTION_IDX 2
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static struct usb_string webcam_strings[] = {
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[STRING_MANUFACTURER_IDX].s = webcam_vendor_label,
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[STRING_PRODUCT_IDX].s = webcam_product_label,
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[STRING_DESCRIPTION_IDX].s = webcam_config_label,
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{ }
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};
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static struct usb_gadget_strings webcam_stringtab = {
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.language = 0x0409, /* en-us */
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.strings = webcam_strings,
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};
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static struct usb_gadget_strings *webcam_device_strings[] = {
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&webcam_stringtab,
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NULL,
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};
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static struct usb_device_descriptor webcam_device_descriptor = {
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.bLength = USB_DT_DEVICE_SIZE,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = cpu_to_le16(0x0200),
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.bDeviceClass = USB_CLASS_MISC,
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.bDeviceSubClass = 0x02,
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.bDeviceProtocol = 0x01,
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.bMaxPacketSize0 = 0, /* dynamic */
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.idVendor = cpu_to_le16(WEBCAM_VENDOR_ID),
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.idProduct = cpu_to_le16(WEBCAM_PRODUCT_ID),
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.bcdDevice = cpu_to_le16(WEBCAM_DEVICE_BCD),
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.iManufacturer = 0, /* dynamic */
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.iProduct = 0, /* dynamic */
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.iSerialNumber = 0, /* dynamic */
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.bNumConfigurations = 0, /* dynamic */
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};
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DECLARE_UVC_HEADER_DESCRIPTOR(1);
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static const struct UVC_HEADER_DESCRIPTOR(1) uvc_control_header = {
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.bLength = UVC_DT_HEADER_SIZE(1),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_HEADER,
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.bcdUVC = cpu_to_le16(0x0100),
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.wTotalLength = 0, /* dynamic */
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.dwClockFrequency = cpu_to_le32(48000000),
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.bInCollection = 0, /* dynamic */
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.baInterfaceNr[0] = 0, /* dynamic */
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};
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static const struct uvc_camera_terminal_descriptor uvc_camera_terminal = {
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.bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_INPUT_TERMINAL,
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.bTerminalID = 1,
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.wTerminalType = cpu_to_le16(0x0201),
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.bAssocTerminal = 0,
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.iTerminal = 0,
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.wObjectiveFocalLengthMin = cpu_to_le16(0),
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.wObjectiveFocalLengthMax = cpu_to_le16(0),
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.wOcularFocalLength = cpu_to_le16(0),
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.bControlSize = 3,
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.bmControls[0] = 2,
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.bmControls[1] = 0,
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.bmControls[2] = 0,
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};
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static const struct uvc_processing_unit_descriptor uvc_processing = {
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.bLength = UVC_DT_PROCESSING_UNIT_SIZE(2),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_PROCESSING_UNIT,
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.bUnitID = 2,
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.bSourceID = 1,
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.wMaxMultiplier = cpu_to_le16(16*1024),
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.bControlSize = 2,
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.bmControls[0] = 1,
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.bmControls[1] = 0,
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.iProcessing = 0,
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};
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static const struct uvc_output_terminal_descriptor uvc_output_terminal = {
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.bLength = UVC_DT_OUTPUT_TERMINAL_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL,
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.bTerminalID = 3,
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.wTerminalType = cpu_to_le16(0x0101),
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.bAssocTerminal = 0,
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.bSourceID = 2,
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.iTerminal = 0,
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};
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DECLARE_UVC_INPUT_HEADER_DESCRIPTOR(1, 2);
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static const struct UVC_INPUT_HEADER_DESCRIPTOR(1, 2) uvc_input_header = {
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.bLength = UVC_DT_INPUT_HEADER_SIZE(1, 2),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_INPUT_HEADER,
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2010-05-02 12:57:42 -06:00
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.bNumFormats = 2,
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.wTotalLength = 0, /* dynamic */
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.bEndpointAddress = 0, /* dynamic */
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.bmInfo = 0,
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.bTerminalLink = 3,
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.bStillCaptureMethod = 0,
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.bTriggerSupport = 0,
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.bTriggerUsage = 0,
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.bControlSize = 1,
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.bmaControls[0][0] = 0,
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.bmaControls[1][0] = 4,
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};
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static const struct uvc_format_uncompressed uvc_format_yuv = {
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.bLength = UVC_DT_FORMAT_UNCOMPRESSED_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FORMAT_UNCOMPRESSED,
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.bFormatIndex = 1,
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.bNumFrameDescriptors = 2,
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.guidFormat =
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{ 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00,
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0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71},
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.bBitsPerPixel = 16,
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.bDefaultFrameIndex = 1,
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.bAspectRatioX = 0,
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.bAspectRatioY = 0,
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.bmInterfaceFlags = 0,
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.bCopyProtect = 0,
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};
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DECLARE_UVC_FRAME_UNCOMPRESSED(1);
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DECLARE_UVC_FRAME_UNCOMPRESSED(3);
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static const struct UVC_FRAME_UNCOMPRESSED(3) uvc_frame_yuv_360p = {
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.bLength = UVC_DT_FRAME_UNCOMPRESSED_SIZE(3),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_UNCOMPRESSED,
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.bFrameIndex = 1,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(640),
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.wHeight = cpu_to_le16(360),
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.dwMinBitRate = cpu_to_le32(18432000),
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.dwMaxBitRate = cpu_to_le32(55296000),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(460800),
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.dwDefaultFrameInterval = cpu_to_le32(666666),
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.bFrameIntervalType = 3,
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.dwFrameInterval[0] = cpu_to_le32(666666),
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.dwFrameInterval[1] = cpu_to_le32(1000000),
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.dwFrameInterval[2] = cpu_to_le32(5000000),
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};
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static const struct UVC_FRAME_UNCOMPRESSED(1) uvc_frame_yuv_720p = {
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.bLength = UVC_DT_FRAME_UNCOMPRESSED_SIZE(1),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_UNCOMPRESSED,
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.bFrameIndex = 2,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(1280),
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.wHeight = cpu_to_le16(720),
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.dwMinBitRate = cpu_to_le32(29491200),
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.dwMaxBitRate = cpu_to_le32(29491200),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(1843200),
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.dwDefaultFrameInterval = cpu_to_le32(5000000),
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.bFrameIntervalType = 1,
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.dwFrameInterval[0] = cpu_to_le32(5000000),
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};
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static const struct uvc_format_mjpeg uvc_format_mjpg = {
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.bLength = UVC_DT_FORMAT_MJPEG_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FORMAT_MJPEG,
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.bFormatIndex = 2,
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.bNumFrameDescriptors = 2,
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.bmFlags = 0,
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.bDefaultFrameIndex = 1,
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.bAspectRatioX = 0,
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.bAspectRatioY = 0,
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.bmInterfaceFlags = 0,
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.bCopyProtect = 0,
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};
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DECLARE_UVC_FRAME_MJPEG(1);
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DECLARE_UVC_FRAME_MJPEG(3);
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static const struct UVC_FRAME_MJPEG(3) uvc_frame_mjpg_360p = {
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.bLength = UVC_DT_FRAME_MJPEG_SIZE(3),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_MJPEG,
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.bFrameIndex = 1,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(640),
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.wHeight = cpu_to_le16(360),
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.dwMinBitRate = cpu_to_le32(18432000),
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.dwMaxBitRate = cpu_to_le32(55296000),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(460800),
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.dwDefaultFrameInterval = cpu_to_le32(666666),
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.bFrameIntervalType = 3,
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.dwFrameInterval[0] = cpu_to_le32(666666),
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.dwFrameInterval[1] = cpu_to_le32(1000000),
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.dwFrameInterval[2] = cpu_to_le32(5000000),
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};
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static const struct UVC_FRAME_MJPEG(1) uvc_frame_mjpg_720p = {
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.bLength = UVC_DT_FRAME_MJPEG_SIZE(1),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_MJPEG,
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.bFrameIndex = 2,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(1280),
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.wHeight = cpu_to_le16(720),
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.dwMinBitRate = cpu_to_le32(29491200),
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.dwMaxBitRate = cpu_to_le32(29491200),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(1843200),
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.dwDefaultFrameInterval = cpu_to_le32(5000000),
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.bFrameIntervalType = 1,
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.dwFrameInterval[0] = cpu_to_le32(5000000),
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};
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static const struct uvc_color_matching_descriptor uvc_color_matching = {
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.bLength = UVC_DT_COLOR_MATCHING_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_COLORFORMAT,
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.bColorPrimaries = 1,
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.bTransferCharacteristics = 1,
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.bMatrixCoefficients = 4,
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};
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static const struct uvc_descriptor_header * const uvc_fs_control_cls[] = {
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(const struct uvc_descriptor_header *) &uvc_control_header,
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(const struct uvc_descriptor_header *) &uvc_camera_terminal,
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(const struct uvc_descriptor_header *) &uvc_processing,
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(const struct uvc_descriptor_header *) &uvc_output_terminal,
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NULL,
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};
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static const struct uvc_descriptor_header * const uvc_ss_control_cls[] = {
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(const struct uvc_descriptor_header *) &uvc_control_header,
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(const struct uvc_descriptor_header *) &uvc_camera_terminal,
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(const struct uvc_descriptor_header *) &uvc_processing,
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(const struct uvc_descriptor_header *) &uvc_output_terminal,
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NULL,
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};
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static const struct uvc_descriptor_header * const uvc_fs_streaming_cls[] = {
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(const struct uvc_descriptor_header *) &uvc_input_header,
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(const struct uvc_descriptor_header *) &uvc_format_yuv,
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(const struct uvc_descriptor_header *) &uvc_frame_yuv_360p,
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(const struct uvc_descriptor_header *) &uvc_frame_yuv_720p,
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(const struct uvc_descriptor_header *) &uvc_format_mjpg,
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(const struct uvc_descriptor_header *) &uvc_frame_mjpg_360p,
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(const struct uvc_descriptor_header *) &uvc_frame_mjpg_720p,
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(const struct uvc_descriptor_header *) &uvc_color_matching,
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NULL,
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};
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static const struct uvc_descriptor_header * const uvc_hs_streaming_cls[] = {
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(const struct uvc_descriptor_header *) &uvc_input_header,
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(const struct uvc_descriptor_header *) &uvc_format_yuv,
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(const struct uvc_descriptor_header *) &uvc_frame_yuv_360p,
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(const struct uvc_descriptor_header *) &uvc_frame_yuv_720p,
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(const struct uvc_descriptor_header *) &uvc_format_mjpg,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_360p,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_720p,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_color_matching,
|
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2012-06-01 03:38:56 -06:00
|
|
|
static const struct uvc_descriptor_header * const uvc_ss_streaming_cls[] = {
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_input_header,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_format_yuv,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_360p,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_720p,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_format_mjpg,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_360p,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_720p,
|
|
|
|
(const struct uvc_descriptor_header *) &uvc_color_matching,
|
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
2010-05-02 12:57:42 -06:00
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
* USB configuration
|
|
|
|
*/
|
|
|
|
|
2010-08-12 09:43:52 -06:00
|
|
|
static int __init
|
2010-05-02 12:57:42 -06:00
|
|
|
webcam_config_bind(struct usb_configuration *c)
|
|
|
|
{
|
2012-06-01 03:38:56 -06:00
|
|
|
return uvc_bind_config(c, uvc_fs_control_cls, uvc_ss_control_cls,
|
|
|
|
uvc_fs_streaming_cls, uvc_hs_streaming_cls,
|
|
|
|
uvc_ss_streaming_cls);
|
2010-05-02 12:57:42 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct usb_configuration webcam_config_driver = {
|
|
|
|
.label = webcam_config_label,
|
|
|
|
.bConfigurationValue = 1,
|
|
|
|
.iConfiguration = 0, /* dynamic */
|
|
|
|
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
|
|
|
|
.bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int /* __init_or_exit */
|
|
|
|
webcam_unbind(struct usb_composite_dev *cdev)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-12 09:43:52 -06:00
|
|
|
static int __init
|
2010-05-02 12:57:42 -06:00
|
|
|
webcam_bind(struct usb_composite_dev *cdev)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Allocate string descriptor numbers ... note that string contents
|
|
|
|
* can be overridden by the composite_dev glue.
|
|
|
|
*/
|
|
|
|
if ((ret = usb_string_id(cdev)) < 0)
|
|
|
|
goto error;
|
|
|
|
webcam_strings[STRING_MANUFACTURER_IDX].id = ret;
|
|
|
|
webcam_device_descriptor.iManufacturer = ret;
|
|
|
|
|
|
|
|
if ((ret = usb_string_id(cdev)) < 0)
|
|
|
|
goto error;
|
|
|
|
webcam_strings[STRING_PRODUCT_IDX].id = ret;
|
|
|
|
webcam_device_descriptor.iProduct = ret;
|
|
|
|
|
|
|
|
if ((ret = usb_string_id(cdev)) < 0)
|
|
|
|
goto error;
|
|
|
|
webcam_strings[STRING_DESCRIPTION_IDX].id = ret;
|
|
|
|
webcam_config_driver.iConfiguration = ret;
|
|
|
|
|
|
|
|
/* Register our configuration. */
|
2010-08-12 09:43:55 -06:00
|
|
|
if ((ret = usb_add_config(cdev, &webcam_config_driver,
|
|
|
|
webcam_config_bind)) < 0)
|
2010-05-02 12:57:42 -06:00
|
|
|
goto error;
|
|
|
|
|
|
|
|
INFO(cdev, "Webcam Video Gadget\n");
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error:
|
|
|
|
webcam_unbind(cdev);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
* Driver
|
|
|
|
*/
|
|
|
|
|
|
|
|
static struct usb_composite_driver webcam_driver = {
|
|
|
|
.name = "g_webcam",
|
|
|
|
.dev = &webcam_device_descriptor,
|
|
|
|
.strings = webcam_device_strings,
|
2012-06-01 03:38:56 -06:00
|
|
|
.max_speed = USB_SPEED_SUPER,
|
2010-05-02 12:57:42 -06:00
|
|
|
.unbind = webcam_unbind,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init
|
|
|
|
webcam_init(void)
|
|
|
|
{
|
2010-08-12 09:43:54 -06:00
|
|
|
return usb_composite_probe(&webcam_driver, webcam_bind);
|
2010-05-02 12:57:42 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit
|
|
|
|
webcam_cleanup(void)
|
|
|
|
{
|
|
|
|
usb_composite_unregister(&webcam_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(webcam_init);
|
|
|
|
module_exit(webcam_cleanup);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Laurent Pinchart");
|
|
|
|
MODULE_DESCRIPTION("Webcam Video Gadget");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_VERSION("0.1.0");
|
|
|
|
|