drivers/usb/gadget/function/u_uac1.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * u_uac1.h - Utility definitions for UAC1 function
   4  *
   5  * Copyright (C) 2016 Ruslan Bilovol <ruslan.bilovol@gmail.com>
   6  */
   7
   8 #ifndef __U_UAC1_H
   9 #define __U_UAC1_H
  10
  11 #include <linux/usb/composite.h>
  12
  13 #define UAC1_OUT_EP_MAX_PACKET_SIZE     200
  14 #define UAC1_DEF_CCHMASK        0x3
  15 #define UAC1_DEF_CSRATE         48000
  16 #define UAC1_DEF_CSSIZE         2
  17 #define UAC1_DEF_PCHMASK        0x3
  18 #define UAC1_DEF_PSRATE         48000
  19 #define UAC1_DEF_PSSIZE         2
  20 #define UAC1_DEF_REQ_NUM        2
  21 #define UAC1_DEF_INT_REQ_NUM    10
  22
  23 #define UAC1_DEF_MUTE_PRESENT   1
  24 #define UAC1_DEF_VOLUME_PRESENT 1
  25 #define UAC1_DEF_MIN_DB         (-100*256)      /* -100 dB */
  26 #define UAC1_DEF_MAX_DB         0               /* 0 dB */
  27 #define UAC1_DEF_RES_DB         (1*256) /* 1 dB */
  28
  29
  30 struct f_uac1_opts {
  31         struct usb_function_instance    func_inst;
  32         int                             c_chmask;
  33         int                             c_srate;
  34         int                             c_ssize;
  35         int                             p_chmask;
  36         int                             p_srate;
  37         int                             p_ssize;
  38
  39         bool                    p_mute_present;
  40         bool                    p_volume_present;
  41         s16                             p_volume_min;
  42         s16                             p_volume_max;
  43         s16                             p_volume_res;
  44
  45         bool                    c_mute_present;
  46         bool                    c_volume_present;
  47         s16                             c_volume_min;
  48         s16                             c_volume_max;
  49         s16                             c_volume_res;
  50
  51         int                             req_number;
  52         unsigned                        bound:1;
  53
  54         struct mutex                    lock;
  55         int                             refcnt;
  56 };
  57
  58 #endif /* __U_UAC1_H */