1/* Copyright (c) 2013-2014 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#ifndef GBA_SAVEDATA_H
 7#define GBA_SAVEDATA_H
 8
 9#include "util/common.h"
10
11struct VFile;
12
13enum SavedataType {
14	SAVEDATA_NONE = 0,
15	SAVEDATA_SRAM,
16	SAVEDATA_FLASH512,
17	SAVEDATA_FLASH1M,
18	SAVEDATA_EEPROM
19};
20
21enum SavedataCommand {
22	EEPROM_COMMAND_NULL = 0,
23	EEPROM_COMMAND_PENDING = 1,
24	EEPROM_COMMAND_WRITE = 2,
25	EEPROM_COMMAND_READ_PENDING = 3,
26	EEPROM_COMMAND_READ = 4,
27
28	FLASH_COMMAND_START = 0xAA,
29	FLASH_COMMAND_CONTINUE = 0x55,
30
31	FLASH_COMMAND_ERASE_CHIP = 0x10,
32	FLASH_COMMAND_ERASE_SECTOR = 0x30,
33
34	FLASH_COMMAND_NONE = 0,
35	FLASH_COMMAND_ERASE = 0x80,
36	FLASH_COMMAND_ID = 0x90,
37	FLASH_COMMAND_PROGRAM = 0xA0,
38	FLASH_COMMAND_SWITCH_BANK = 0xB0,
39	FLASH_COMMAND_TERMINATE = 0xF0
40};
41
42enum FlashStateMachine {
43	FLASH_STATE_RAW = 0,
44	FLASH_STATE_START,
45	FLASH_STATE_CONTINUE
46};
47
48enum FlashManufacturer {
49	FLASH_MFG_PANASONIC = 0x1B32,
50	FLASH_MFG_SANYO = 0x1362
51};
52
53enum {
54	SAVEDATA_FLASH_BASE = 0x0E005555,
55
56	FLASH_BASE_HI = 0x5555,
57	FLASH_BASE_LO = 0x2AAA
58};
59
60struct GBASavedata {
61	enum SavedataType type;
62	uint8_t* data;
63	enum SavedataCommand command;
64	struct VFile* vf;
65
66	int mapMode;
67	struct VFile* realVf;
68
69	int readBitsRemaining;
70	int readAddress;
71	int writeAddress;
72	int writePending;
73	int addressBits;
74
75	uint8_t* currentBank;
76
77	enum FlashStateMachine flashState;
78};
79
80void GBASavedataInit(struct GBASavedata* savedata, struct VFile* vf);
81void GBASavedataDeinit(struct GBASavedata* savedata);
82
83void GBASavedataMask(struct GBASavedata* savedata, struct VFile* vf);
84void GBASavedataUnmask(struct GBASavedata* savedata);
85bool GBASavedataClone(struct GBASavedata* savedata, struct VFile* out);
86
87void GBASavedataInitFlash(struct GBASavedata* savedata);
88void GBASavedataInitEEPROM(struct GBASavedata* savedata);
89void GBASavedataInitSRAM(struct GBASavedata* savedata);
90
91uint8_t GBASavedataReadFlash(struct GBASavedata* savedata, uint16_t address);
92void GBASavedataWriteFlash(struct GBASavedata* savedata, uint16_t address, uint8_t value);
93
94uint16_t GBASavedataReadEEPROM(struct GBASavedata* savedata);
95void GBASavedataWriteEEPROM(struct GBASavedata* savedata, uint16_t value, uint32_t writeSize);
96
97#endif