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_WRITE_COOKIE1 VCHIQ_MAKE_FOURCC('B', 'C', 'M', 'A')
  12#define VC_AUDIO_WRITE_COOKIE2 VCHIQ_MAKE_FOURCC('D', 'A', 'T', 'A')
  13
  14/*
  15 *  List of screens that are currently supported
  16 *  All message types supported for HOST->VC direction
  17 */
  18
  19enum vc_audio_msg_type {
  20        VC_AUDIO_MSG_TYPE_RESULT, // Generic result
  21        VC_AUDIO_MSG_TYPE_COMPLETE, // Generic result
  22        VC_AUDIO_MSG_TYPE_CONFIG, // Configure audio
  23        VC_AUDIO_MSG_TYPE_CONTROL, // Configure audio
  24        VC_AUDIO_MSG_TYPE_OPEN, // Configure audio
  25        VC_AUDIO_MSG_TYPE_CLOSE, // Configure audio
  26        VC_AUDIO_MSG_TYPE_START, // Configure audio
  27        VC_AUDIO_MSG_TYPE_STOP, // Configure audio
  28        VC_AUDIO_MSG_TYPE_WRITE, // Configure audio
  29        VC_AUDIO_MSG_TYPE_MAX
  30};
  31
  32/* configure the audio */
  33
  34struct vc_audio_config {
  35        u32 channels;
  36        u32 samplerate;
  37        u32 bps;
  38};
  39
  40struct vc_audio_control {
  41        u32 volume;
  42        u32 dest;
  43};
  44
  45struct vc_audio_open {
  46        u32 dummy;
  47};
  48
  49struct vc_audio_close {
  50        u32 dummy;
  51};
  52
  53struct vc_audio_start {
  54        u32 dummy;
  55};
  56
  57struct vc_audio_stop {
  58        u32 draining;
  59};
  60
  61/* configure the write audio samples */
  62struct vc_audio_write {
  63        u32 count; // in bytes
  64        u32 cookie1;
  65        u32 cookie2;
  66        s16 silence;
  67        s16 max_packet;
  68};
  69
  70/* Generic result for a request (VC->HOST) */
  71struct vc_audio_result {
  72        s32 success; // Success value
  73};
  74
  75/* Generic result for a request (VC->HOST) */
  76struct vc_audio_complete {
  77        s32 count; // Success value
  78        u32 cookie1;
  79        u32 cookie2;
  80};
  81
  82/* Message header for all messages in HOST->VC direction */
  83struct vc_audio_msg {
  84        s32 type; /* Message type (VC_AUDIO_MSG_TYPE) */
  85        union {
  86                struct vc_audio_config config;
  87                struct vc_audio_control control;
  88                struct vc_audio_open open;
  89                struct vc_audio_close close;
  90                struct vc_audio_start start;
  91                struct vc_audio_stop stop;
  92                struct vc_audio_write write;
  93                struct vc_audio_result result;
  94                struct vc_audio_complete complete;
  95        };
  96};
  97
  98#endif /* _VC_AUDIO_DEFS_H_ */
  99