sound/sh/aica.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* aica.h
   3  * Header file for ALSA driver for
   4  * Sega Dreamcast Yamaha AICA sound
   5  * Copyright Adrian McMenamin
   6  * <adrian@mcmen.demon.co.uk>
   7  * 2006
   8  */
   9
  10 /* SPU memory and register constants etc */
  11 #define G2_FIFO 0xa05f688c
  12 #define SPU_MEMORY_BASE 0xA0800000
  13 #define ARM_RESET_REGISTER 0xA0702C00
  14 #define SPU_REGISTER_BASE 0xA0700000
  15
  16 /* AICA channels stuff */
  17 #define AICA_CONTROL_POINT 0xA0810000
  18 #define AICA_CONTROL_CHANNEL_SAMPLE_NUMBER 0xA0810008
  19 #define AICA_CHANNEL0_CONTROL_OFFSET 0x10004
  20
  21 /* Command values */
  22 #define AICA_CMD_KICK 0x80000000
  23 #define AICA_CMD_NONE 0
  24 #define AICA_CMD_START 1
  25 #define AICA_CMD_STOP 2
  26 #define AICA_CMD_VOL 3
  27
  28 /* Sound modes */
  29 #define SM_8BIT         1
  30 #define SM_16BIT        0
  31 #define SM_ADPCM        2
  32
  33 /* Buffer and period size */
  34 #define AICA_BUFFER_SIZE 0x8000
  35 #define AICA_PERIOD_SIZE 0x800
  36 #define AICA_PERIOD_NUMBER 16
  37
  38 #define AICA_CHANNEL0_OFFSET 0x11000
  39 #define AICA_CHANNEL1_OFFSET 0x21000
  40 #define CHANNEL_OFFSET 0x10000
  41
  42 #define AICA_DMA_CHANNEL 5
  43 #define AICA_DMA_MODE 5
  44
  45 #define SND_AICA_DRIVER "AICA"
  46
  47 struct aica_channel {
  48         uint32_t cmd;           /* Command ID           */
  49         uint32_t pos;           /* Sample position      */
  50         uint32_t length;        /* Sample length        */
  51         uint32_t freq;          /* Frequency            */
  52         uint32_t vol;           /* Volume 0-255         */
  53         uint32_t pan;           /* Pan 0-255            */
  54         uint32_t sfmt;          /* Sound format         */
  55         uint32_t flags;         /* Bit flags            */
  56 };
  57
  58 struct snd_card_aica {
  59         struct work_struct spu_dma_work;
  60         struct snd_card *card;
  61         struct aica_channel *channel;
  62         struct snd_pcm_substream *substream;
  63         int clicks;
  64         int current_period;
  65         struct timer_list timer;
  66         int master_volume;
  67         int dma_check;
  68 };