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* u_uac2.h
* Utility definitions for UAC2 function
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
* Author: Andrzej Pietrasiewicz <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#ifndef U_UAC2_H
#define U_UAC2_H
#include <linux/usb/composite.h>
#define UAC2_DEF_PCHMASK 0x3
#define UAC2_DEF_PSRATE 48000
#define UAC2_DEF_PSSIZE 2
#define UAC2_DEF_CCHMASK 0x3
#define UAC2_DEF_CSRATE 64000
#define UAC2_DEF_CSSIZE 2
#define UAC2_DEF_REQ_NUM 2
struct f_uac2_opts {
struct usb_function_instance func_inst;
int p_chmask;
int p_srate;
int p_ssize;
int c_chmask;
int c_srate;
int c_ssize;
int req_number;
bool bound;
struct mutex lock;
int refcnt;