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Tip revision: 2ef96a5bb12be62ef75b5828c0aab838ebb29cb8 authored by Linus Torvalds on 10 May 2020, 22:16:58 UTC
Linux 5.7-rc5
Linux 5.7-rc5
Tip revision: 2ef96a5
aica.h
/* 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;
};