1. 根目录:
2. include
3. linux
4. usb
5. audio.h

/*
 * <linux/usb/audio.h> -- USB Audio definitions.
 *
 * Copyright (C) 2006 Thumtronics Pty Ltd.
 * Developed for Thumtronics by Grey Innovation
 * Ben Williamson <ben.williamson@greyinnovation.com>
 *
 * This software is distributed under the terms of the GNU General Public
 * License ("GPL") version 2, as published by the Free Software Foundation.
 *
 * This file holds USB constants and structures defined
 * by the USB Device Class Definition for Audio Devices.
 * Comments below reference relevant sections of that document:
 *
 * http://www.usb.org/developers/devclass_docs/audio10.pdf
 *
 * Types and defines in this file are either specific to version 1.0 of
 * this standard or common for newer versions.
 */
#ifndef __LINUX_USB_AUDIO_H
#define __LINUX_USB_AUDIO_H

#include <uapi/linux/usb/audio.h>


struct usb_audio_control {
	struct list_head list;
	const char *name;
	u8 type;
	int data[5];
	int (*set)(struct usb_audio_control *con, u8 cmd, int value);
	int (*get)(struct usb_audio_control *con, u8 cmd);
};

struct usb_audio_control_selector {
	struct list_head list;
	struct list_head control;
	u8 id;
	const char *name;
	u8 type;
	struct usb_descriptor_header *desc;
};

#endif /* __LINUX_USB_AUDIO_H */