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