1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * <linux/usb/audio.h> -- USB Audio definitions. 4 * 5 * Copyright (C) 2006 Thumtronics Pty Ltd. 6 * Developed for Thumtronics by Grey Innovation 7 * Ben Williamson <ben.williamson@greyinnovation.com> 8 * 9 * This software is distributed under the terms of the GNU General Public 10 * License ("GPL") version 2, as published by the Free Software Foundation. 11 * 12 * This file holds USB constants and structures defined 13 * by the USB Device Class Definition for Audio Devices. 14 * Comments below reference relevant sections of that document: 15 * 16 * http://www.usb.org/developers/devclass_docs/audio10.pdf 17 * 18 * Types and defines in this file are either specific to version 1.0 of 19 * this standard or common for newer versions. 20 */ 21 #ifndef __LINUX_USB_AUDIO_H 22 #define __LINUX_USB_AUDIO_H 23 24 #include <uapi/linux/usb/audio.h> 25 26 struct usb_audio_control { 27 struct list_head list; 28 const char *name; 29 u8 type; 30 int data[5]; 31 int (*set)(struct usb_audio_control *con, u8 cmd, int value); 32 int (*get)(struct usb_audio_control *con, u8 cmd); 33 }; 34 35 struct usb_audio_control_selector { 36 struct list_head list; 37 struct list_head control; 38 u8 id; 39 const char *name; 40 u8 type; 41 struct usb_descriptor_header *desc; 42 }; 43 44 #endif /* __LINUX_USB_AUDIO_H */ 45