LXR linux/drivers/staging/vc04_services/bcm2835-audio/vc_vchi_audioserv

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright 2011 Broadcom Corporation.  All rights reserved. */
   3
   4#ifndef _VC_AUDIO_DEFS_H_
   5#define _VC_AUDIO_DEFS_H_
   6
   7#define VC_AUDIOSERV_MIN_VER 1
   8#define VC_AUDIOSERV_VER 2
   9
  10/* FourCC codes used for VCHI communication */
  11#define VC_AUDIO_SERVER_NAME  MAKE_FOURCC("AUDS")
  12#define VC_AUDIO_WRITE_COOKIE1 MAKE_FOURCC("BCMA")
  13#define VC_AUDIO_WRITE_COOKIE2 MAKE_FOURCC("DATA")
  14
  15/*
  16 *  List of screens that are currently supported
  17 *  All message types supported for HOST->VC direction
  18 */
  19
  20enum vc_audio_msg_type {
  21        VC_AUDIO_MSG_TYPE_RESULT, // Generic result
  22        VC_AUDIO_MSG_TYPE_COMPLETE, // Generic result
  23        VC_AUDIO_MSG_TYPE_CONFIG, // Configure audio
  24        VC_AUDIO_MSG_TYPE_CONTROL, // Configure audio
  25        VC_AUDIO_MSG_TYPE_OPEN, // Configure audio
  26        VC_AUDIO_MSG_TYPE_CLOSE, // Configure audio
  27        VC_AUDIO_MSG_TYPE_START, // Configure audio
  28        VC_AUDIO_MSG_TYPE_STOP, // Configure audio
  29        VC_AUDIO_MSG_TYPE_WRITE, // Configure audio
  30        VC_AUDIO_MSG_TYPE_MAX
  31};
  32
  33/* configure the audio */
  34
  35struct vc_audio_config {
  36        u32 channels;
  37        u32 samplerate;
  38        u32 bps;
  39};
  40
  41struct vc_audio_control {
  42        u32 volume;
  43        u32 dest;
  44};
  45
  46struct vc_audio_open {
  47        u32 dummy;
  48};
  49
  50struct vc_audio_close {
  51        u32 dummy;
  52};
  53
  54struct vc_audio_start {
  55        u32 dummy;
  56};
  57
  58struct vc_audio_stop {
  59        u32 draining;
  60};
  61
  62/* configure the write audio samples */
  63struct vc_audio_write {
  64        u32 count; // in bytes
  65        u32 cookie1;
  66        u32 cookie2;
  67        s16 silence;
  68        s16 max_packet;
  69};
  70
  71/* Generic result for a request (VC->HOST) */
  72struct vc_audio_result {
  73        s32 success; // Success value
  74};
  75
  76/* Generic result for a request (VC->HOST) */
  77struct vc_audio_complete {
  78        s32 count; // Success value
  79        u32 cookie1;
  80        u32 cookie2;
  81};
  82
  83/* Message header for all messages in HOST->VC direction */
  84struct vc_audio_msg {
  85        s32 type; /* Message type (VC_AUDIO_MSG_TYPE) */
  86        union {
  87                struct vc_audio_config config;
  88                struct vc_audio_control control;
  89                struct vc_audio_open open;
  90                struct vc_audio_close close;
  91                struct vc_audio_start start;
  92                struct vc_audio_stop stop;
  93                struct vc_audio_write write;
  94                struct vc_audio_result result;
  95                struct vc_audio_complete complete;
  96        };
  97};
  98
  99#endif /* _VC_AUDIO_DEFS_H_ */
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