/* 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;
  };