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