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 47struct 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 58struct 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}; 69