2 * Header file for ALSA driver for
3 * Sega Dreamcast Yamaha AICA sound
4 * Copyright Adrian McMenamin
5 * <adrian@mcmen.demon.co.uk>
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.
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.
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
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
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
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
46 /* Buffer and period size */
47 #define AICA_BUFFER_SIZE 0x8000
48 #define AICA_PERIOD_SIZE 0x800
49 #define AICA_PERIOD_NUMBER 16
51 #define AICA_CHANNEL0_OFFSET 0x11000
52 #define AICA_CHANNEL1_OFFSET 0x21000
53 #define CHANNEL_OFFSET 0x10000
55 #define AICA_DMA_CHANNEL 5
56 #define AICA_DMA_MODE 5
58 #define SND_AICA_DRIVER "AICA"
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 */
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;
78 struct timer_list timer;