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Adrian McMenamin198de432007-05-18 14:26:59 +02001/* 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
Adrian McMenamineb695db2007-07-24 13:30:55 +090055#define AICA_DMA_CHANNEL 5
Adrian McMenamin198de432007-05-18 14:26:59 +020056#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 {
Takashi Iwaid20b9b22007-07-09 10:36:22 +020072 struct work_struct spu_dma_work;
Adrian McMenamin198de432007-05-18 14:26:59 +020073 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};