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/* aica.h
* Header file for ALSA driver for
* Sega Dreamcast Yamaha AICA sound
* Copyright Adrian McMenamin
* <adrian@mcmen.demon.co.uk>
* 2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* 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 0
#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 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;
};
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