sound/sh/aica.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /* aica.h
0003  * Header file for ALSA driver for
0004  * Sega Dreamcast Yamaha AICA sound
0005  * Copyright Adrian McMenamin
0006  * <adrian@mcmen.demon.co.uk>
0007  * 2006
0008  */
0009
0010 /* SPU memory and register constants etc */
0011 #define G2_FIFO 0xa05f688c
0012 #define SPU_MEMORY_BASE 0xA0800000
0013 #define ARM_RESET_REGISTER 0xA0702C00
0014 #define SPU_REGISTER_BASE 0xA0700000
0015
0016 /* AICA channels stuff */
0017 #define AICA_CONTROL_POINT 0xA0810000
0018 #define AICA_CONTROL_CHANNEL_SAMPLE_NUMBER 0xA0810008
0019 #define AICA_CHANNEL0_CONTROL_OFFSET 0x10004
0020
0021 /* Command values */
0022 #define AICA_CMD_KICK 0x80000000
0023 #define AICA_CMD_NONE 0
0024 #define AICA_CMD_START 1
0025 #define AICA_CMD_STOP 2
0026 #define AICA_CMD_VOL 3
0027
0028 /* Sound modes */
0029 #define SM_8BIT     1
0030 #define SM_16BIT    0
0031 #define SM_ADPCM    2
0032
0033 /* Buffer and period size */
0034 #define AICA_BUFFER_SIZE 0x8000
0035 #define AICA_PERIOD_SIZE 0x800
0036 #define AICA_PERIOD_NUMBER 16
0037
0038 #define AICA_CHANNEL0_OFFSET 0x11000
0039 #define AICA_CHANNEL1_OFFSET 0x21000
0040 #define CHANNEL_OFFSET 0x10000
0041
0042 #define AICA_DMA_CHANNEL 5
0043 #define AICA_DMA_MODE 5
0044
0045 #define SND_AICA_DRIVER "AICA"
0046
0047 struct aica_channel {
0048     uint32_t cmd;       /* Command ID           */
0049     uint32_t pos;       /* Sample position      */
0050     uint32_t length;    /* Sample length        */
0051     uint32_t freq;      /* Frequency            */
0052     uint32_t vol;       /* Volume 0-255         */
0053     uint32_t pan;       /* Pan 0-255            */
0054     uint32_t sfmt;      /* Sound format         */
0055     uint32_t flags;     /* Bit flags            */
0056 };
0057
0058 struct snd_card_aica {
0059     struct work_struct spu_dma_work;
0060     struct snd_card *card;
0061     struct aica_channel *channel;
0062     struct snd_pcm_substream *substream;
0063     int clicks;
0064     int current_period;
0065     struct timer_list timer;
0066     int master_volume;
0067     int dma_check;
0068 };