1#ifndef GBA_SAVEDATA_H
 2#define GBA_SAVEDATA_H
 3
 4#include "common.h"
 5
 6struct VFile;
 7
 8enum SavedataType {
 9	SAVEDATA_NONE = 0,
10	SAVEDATA_SRAM,
11	SAVEDATA_FLASH512,
12	SAVEDATA_FLASH1M,
13	SAVEDATA_EEPROM
14};
15
16enum SavedataCommand {
17	EEPROM_COMMAND_NULL = 0,
18	EEPROM_COMMAND_PENDING = 1,
19	EEPROM_COMMAND_WRITE = 2,
20	EEPROM_COMMAND_READ_PENDING = 3,
21	EEPROM_COMMAND_READ = 4,
22
23	FLASH_COMMAND_START = 0xAA,
24	FLASH_COMMAND_CONTINUE = 0x55,
25
26	FLASH_COMMAND_ERASE_CHIP = 0x10,
27	FLASH_COMMAND_ERASE_SECTOR = 0x30,
28
29	FLASH_COMMAND_NONE = 0,
30	FLASH_COMMAND_ERASE = 0x80,
31	FLASH_COMMAND_ID = 0x90,
32	FLASH_COMMAND_PROGRAM = 0xA0,
33	FLASH_COMMAND_SWITCH_BANK = 0xB0,
34	FLASH_COMMAND_TERMINATE = 0xF0
35};
36
37enum FlashStateMachine {
38	FLASH_STATE_RAW = 0,
39	FLASH_STATE_START,
40	FLASH_STATE_CONTINUE
41};
42
43enum FlashManufacturer {
44	FLASH_MFG_PANASONIC = 0x1B32,
45	FLASH_MFG_SANYO = 0x1362
46};
47
48enum {
49	SAVEDATA_FLASH_BASE = 0x0E005555,
50
51	FLASH_BASE_HI = 0x5555,
52	FLASH_BASE_LO = 0x2AAA
53};
54
55struct GBASavedata {
56	enum SavedataType type;
57	uint8_t* data;
58	enum SavedataCommand command;
59	struct VFile* vf;
60
61	int mapMode;
62	struct VFile* realVf;
63
64	int readBitsRemaining;
65	int readAddress;
66	int writeAddress;
67	int writePending;
68	int addressBits;
69
70	uint8_t* currentBank;
71
72	enum FlashStateMachine flashState;
73};
74
75void GBASavedataInit(struct GBASavedata* savedata, struct VFile* vf);
76void GBASavedataDeinit(struct GBASavedata* savedata);
77
78void GBASavedataMask(struct GBASavedata* savedata, struct VFile* vf);
79void GBASavedataUnmask(struct GBASavedata* savedata);
80bool GBASavedataClone(struct GBASavedata* savedata, struct VFile* out);
81
82void GBASavedataInitFlash(struct GBASavedata* savedata);
83void GBASavedataInitEEPROM(struct GBASavedata* savedata);
84void GBASavedataInitSRAM(struct GBASavedata* savedata);
85
86uint8_t GBASavedataReadFlash(struct GBASavedata* savedata, uint16_t address);
87void GBASavedataWriteFlash(struct GBASavedata* savedata, uint16_t address, uint8_t value);
88
89uint16_t GBASavedataReadEEPROM(struct GBASavedata* savedata);
90void GBASavedataWriteEEPROM(struct GBASavedata* savedata, uint16_t value, uint32_t writeSize);
91
92#endif