1/* SPDX-License-Identifier: GPL-2.0-only */
2/* aica.h
3 * Header file for ALSA driver for
4 * Sega Dreamcast Yamaha AICA sound
5 * Copyright Adrian McMenamin
6 * <adrian@mcmen.demon.co.uk>
7 * 2006
8 */
9
10/* SPU memory and register constants etc */
11#define G2_FIFO 0xa05f688c
12#define SPU_MEMORY_BASE 0xA0800000
13#define ARM_RESET_REGISTER 0xA0702C00
14#define SPU_REGISTER_BASE 0xA0700000
15
16/* AICA channels stuff */
17#define AICA_CONTROL_POINT 0xA0810000
18#define AICA_CONTROL_CHANNEL_SAMPLE_NUMBER 0xA0810008
19#define AICA_CHANNEL0_CONTROL_OFFSET 0x10004
20
21/* Command values */
22#define AICA_CMD_KICK 0x80000000
23#define AICA_CMD_NONE 0
24#define AICA_CMD_START 1
25#define AICA_CMD_STOP 2
26#define AICA_CMD_VOL 3
27
28/* Sound modes */
29#define SM_8BIT		1
30#define SM_16BIT	0
31#define SM_ADPCM	2
32
33/* Buffer and period size */
34#define AICA_BUFFER_SIZE 0x8000
35#define AICA_PERIOD_SIZE 0x800
36#define AICA_PERIOD_NUMBER 16
37
38#define AICA_CHANNEL0_OFFSET 0x11000
39#define AICA_CHANNEL1_OFFSET 0x21000
40#define CHANNEL_OFFSET 0x10000
41
42#define AICA_DMA_CHANNEL 5
43#define AICA_DMA_MODE 5
44
45#define SND_AICA_DRIVER "AICA"
46
47struct aica_channel {
48	uint32_t cmd;		/* Command ID           */
49	uint32_t pos;		/* Sample position      */
50	uint32_t length;	/* Sample length        */
51	uint32_t freq;		/* Frequency            */
52	uint32_t vol;		/* Volume 0-255         */
53	uint32_t pan;		/* Pan 0-255            */
54	uint32_t sfmt;		/* Sound format         */
55	uint32_t flags;		/* Bit flags            */
56};
57
58struct snd_card_aica {
59	struct work_struct spu_dma_work;
60	struct snd_card *card;
61	struct aica_channel *channel;
62	struct snd_pcm_substream *substream;
63	int clicks;
64	int current_period;
65	struct timer_list timer;
66	int master_volume;
67	int dma_check;
68};
69