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 }; 82