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 file holds USB constants and structures defined 10 * by the USB Device Class Definition for Audio Devices. 11 * Comments below reference relevant sections of that document: 12 * 13 * http://www.usb.org/developers/devclass_docs/audio10.pdf 14 * 15 * Types and defines in this file are either specific to version 1.0 of 16 * this standard or common for newer versions. 17 */ 18 #ifndef __LINUX_USB_AUDIO_H 19 #define __LINUX_USB_AUDIO_H 20 21 #include <uapi/linux/usb/audio.h> 22 23 24 struct usb_audio_control { 25 struct list_head list; 26 const char *name; 27 u8 type; 28 int data[5]; 29 int (*set)(struct usb_audio_control *con, u8 cmd, int value); 30 int (*get)(struct usb_audio_control *con, u8 cmd); 31 }; 32 33 struct usb_audio_control_selector { 34 struct list_head list; 35 struct list_head control; 36 u8 id; 37 const char *name; 38 u8 type; 39 struct usb_descriptor_header *desc; 40 }; 41 42 #endif /* __LINUX_USB_AUDIO_H */ 43