69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/* aica.h
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* Header file for ALSA driver for
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* Sega Dreamcast Yamaha AICA sound
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* Copyright Adrian McMenamin
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* <adrian@mcmen.demon.co.uk>
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* 2006
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*/
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/* SPU memory and register constants etc */
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#define G2_FIFO 0xa05f688c
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#define SPU_MEMORY_BASE 0xA0800000
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#define ARM_RESET_REGISTER 0xA0702C00
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#define SPU_REGISTER_BASE 0xA0700000
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/* AICA channels stuff */
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#define AICA_CONTROL_POINT 0xA0810000
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#define AICA_CONTROL_CHANNEL_SAMPLE_NUMBER 0xA0810008
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#define AICA_CHANNEL0_CONTROL_OFFSET 0x10004
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/* Command values */
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#define AICA_CMD_KICK 0x80000000
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#define AICA_CMD_NONE 0
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#define AICA_CMD_START 1
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#define AICA_CMD_STOP 2
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#define AICA_CMD_VOL 3
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/* Sound modes */
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#define SM_8BIT 1
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#define SM_16BIT 0
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#define SM_ADPCM 2
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/* Buffer and period size */
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#define AICA_BUFFER_SIZE 0x8000
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#define AICA_PERIOD_SIZE 0x800
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#define AICA_PERIOD_NUMBER 16
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#define AICA_CHANNEL0_OFFSET 0x11000
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#define AICA_CHANNEL1_OFFSET 0x21000
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#define CHANNEL_OFFSET 0x10000
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#define AICA_DMA_CHANNEL 5
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#define AICA_DMA_MODE 5
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#define SND_AICA_DRIVER "AICA"
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struct aica_channel {
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uint32_t cmd; /* Command ID */
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uint32_t pos; /* Sample position */
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uint32_t length; /* Sample length */
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uint32_t freq; /* Frequency */
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uint32_t vol; /* Volume 0-255 */
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uint32_t pan; /* Pan 0-255 */
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uint32_t sfmt; /* Sound format */
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uint32_t flags; /* Bit flags */
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};
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struct snd_card_aica {
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struct work_struct spu_dma_work;
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struct snd_card *card;
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struct aica_channel *channel;
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struct snd_pcm_substream *substream;
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int clicks;
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int current_period;
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struct timer_list timer;
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int master_volume;
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int dma_check;
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};
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