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