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 }; 69