sound/sh/aica.h

   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
  60 struct 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
  71 struct 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 };