xref: /openbmc/linux/sound/sh/aica.h (revision b5f184fbdb03b4fcc1141de34dd5ec964ca5d99e)
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  
47  struct 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  
58  struct 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