linux/sound/sh/aica.h
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   1/* aica.h
   2 * Header file for ALSA driver for
   3 * Sega Dreamcast Yamaha AICA sound
   4 * Copyright Adrian McMenamin
   5 * <adrian@mcmen.demon.co.uk>
   6 * 2006
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of version 2 of the GNU General Public License as published by
  10 * the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20 *
  21 */
  22
  23/* SPU memory and register constants etc */
  24#define G2_FIFO 0xa05f688c
  25#define SPU_MEMORY_BASE 0xA0800000
  26#define ARM_RESET_REGISTER 0xA0702C00
  27#define SPU_REGISTER_BASE 0xA0700000
  28
  29/* AICA channels stuff */
  30#define AICA_CONTROL_POINT 0xA0810000
  31#define AICA_CONTROL_CHANNEL_SAMPLE_NUMBER 0xA0810008
  32#define AICA_CHANNEL0_CONTROL_OFFSET 0x10004
  33
  34/* Command values */
  35#define AICA_CMD_KICK 0x80000000
  36#define AICA_CMD_NONE 0
  37#define AICA_CMD_START 1
  38#define AICA_CMD_STOP 2
  39#define AICA_CMD_VOL 3
  40
  41/* Sound modes */
  42#define SM_8BIT         1
  43#define SM_16BIT        0
  44#define SM_ADPCM        2
  45
  46/* Buffer and period size */
  47#define AICA_BUFFER_SIZE 0x8000
  48#define AICA_PERIOD_SIZE 0x800
  49#define AICA_PERIOD_NUMBER 16
  50
  51#define AICA_CHANNEL0_OFFSET 0x11000
  52#define AICA_CHANNEL1_OFFSET 0x21000
  53#define CHANNEL_OFFSET 0x10000
  54
  55#define AICA_DMA_CHANNEL 5
  56#define AICA_DMA_MODE 5
  57
  58#define SND_AICA_DRIVER "AICA"
  59
  60struct aica_channel {
  61        uint32_t cmd;           /* Command ID           */
  62        uint32_t pos;           /* Sample position      */
  63        uint32_t length;        /* Sample length        */
  64        uint32_t freq;          /* Frequency            */
  65        uint32_t vol;           /* Volume 0-255         */
  66        uint32_t pan;           /* Pan 0-255            */
  67        uint32_t sfmt;          /* Sound format         */
  68        uint32_t flags;         /* Bit flags            */
  69};
  70
  71struct snd_card_aica {
  72        struct work_struct spu_dma_work;
  73        struct snd_card *card;
  74        struct aica_channel *channel;
  75        struct snd_pcm_substream *substream;
  76        int clicks;
  77        int current_period;
  78        struct timer_list timer;
  79        int master_volume;
  80        int dma_check;
  81};
  82
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