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68 lines
1.7 KiB
68 lines
1.7 KiB
/* 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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* <[email protected]> |
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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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