linux-imx

/* 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 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;

};