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linux/drivers/usb/gadget/webcam.c
Laurent Pinchart 5d9955f8a9 V4L/DVB: uvc: Fix multiple symbols definitions with UVC gadget and host drivers 
The UVC gadget driver borrowed code from the UVC host driver without
changing the symbol names. This results in a namespace clash with
multiple definitions of several symbols when compiling both drivers in
the kernel.

Make all generic UVC functions and variables static in the UVC gadget
driver, as the symbols are not referenced outside of the gadget driver.
Rename the uvc_trace_param global variable to uvc_gadget_trace_param.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-07-11 17:45:10 -03:00

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/*
* 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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_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_DT_COLOR_MATCHING,
.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,
.bind = webcam_config_bind,
.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)) < 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,
.bind = webcam_bind,
.unbind = webcam_unbind,
};
static int __init
webcam_init(void)
{
return usb_composite_register(&webcam_driver);
}
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");
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