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Commit | Line | Data |
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ac13a6b3 MCA |
1 | /* |
2 | * QEMU Apple Sound Chip emulation | |
3 | * | |
4 | * Apple Sound Chip (ASC) 344S0063 | |
5 | * Enhanced Apple Sound Chip (EASC) 343S1063 | |
6 | * | |
7 | * Copyright (c) 2012-2018 Laurent Vivier <laurent@vivier.eu> | |
8 | * Copyright (c) 2022 Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | |
9 | * | |
10 | * SPDX-License-Identifier: GPL-2.0-or-later | |
11 | */ | |
12 | ||
13 | #ifndef HW_AUDIO_ASC_H | |
14 | #define HW_AUDIO_ASC_H | |
15 | ||
ac13a6b3 MCA |
16 | #include "hw/sysbus.h" |
17 | #include "audio/audio.h" | |
18 | ||
19 | #define ASC_FREQ 22257 | |
20 | ||
21 | enum { | |
22 | ASC_TYPE_ASC = 0, /* original discrete Apple Sound Chip */ | |
23 | ASC_TYPE_EASC = 1 /* discrete Enhanced Apple Sound Chip */ | |
24 | }; | |
25 | ||
26 | #define ASC_FIFO_OFFSET 0x0 | |
27 | #define ASC_FIFO_SIZE 0x400 | |
28 | ||
29 | #define ASC_REG_OFFSET 0x800 | |
30 | #define ASC_REG_SIZE 0x60 | |
31 | ||
32 | #define ASC_EXTREG_OFFSET 0xf00 | |
33 | #define ASC_EXTREG_SIZE 0x20 | |
34 | ||
35 | typedef struct ASCFIFOState { | |
36 | int index; | |
37 | ||
38 | MemoryRegion mem_fifo; | |
39 | uint8_t fifo[ASC_FIFO_SIZE]; | |
40 | uint8_t int_status; | |
41 | ||
42 | int cnt; | |
43 | int wptr; | |
44 | int rptr; | |
45 | ||
46 | MemoryRegion mem_extregs; | |
47 | uint8_t extregs[ASC_EXTREG_SIZE]; | |
48 | ||
49 | int xa_cnt; | |
50 | uint8_t xa_val; | |
51 | uint8_t xa_flags; | |
52 | int16_t xa_last[2]; | |
53 | } ASCFIFOState; | |
54 | ||
55 | struct ASCState { | |
56 | SysBusDevice parent_obj; | |
57 | ||
58 | uint8_t type; | |
59 | MemoryRegion asc; | |
60 | MemoryRegion mem_fifo; | |
61 | MemoryRegion mem_regs; | |
62 | MemoryRegion mem_extregs; | |
63 | ||
64 | QEMUSoundCard card; | |
65 | SWVoiceOut *voice; | |
66 | uint8_t *mixbuf; | |
67 | int samples; | |
68 | int shift; | |
69 | ||
5243e554 MCA |
70 | uint8_t *silentbuf; |
71 | ||
ac13a6b3 MCA |
72 | /* Time when we were last able to generate samples */ |
73 | int64_t fifo_empty_ns; | |
74 | ||
75 | qemu_irq irq; | |
76 | ||
77 | ASCFIFOState fifos[2]; | |
78 | ||
79 | uint8_t regs[ASC_REG_SIZE]; | |
80 | }; | |
81 | ||
82 | #define TYPE_ASC "apple-sound-chip" | |
83 | OBJECT_DECLARE_SIMPLE_TYPE(ASCState, ASC) | |
84 | ||
85 | #endif |