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#include "gba/gba.h"
#include "gba/flash_internal.h"
u16 EraseFlashChip_MX(void)
{
u16 result;
u16 readFlash1Buffer[0x20];
REG_WAITCNT = (REG_WAITCNT & ~WAITCNT_SRAM_MASK) | gFlash->wait[0];
FLASH_WRITE(0x5555, 0xAA);
FLASH_WRITE(0x2AAA, 0x55);
FLASH_WRITE(0x5555, 0x80);
FLASH_WRITE(0x5555, 0xAA);
FLASH_WRITE(0x2AAA, 0x55);
FLASH_WRITE(0x5555, 0x10);
SetReadFlash1(readFlash1Buffer);
result = WaitForFlashWrite(3, FLASH_BASE, 0xFF);
REG_WAITCNT = (REG_WAITCNT & ~WAITCNT_SRAM_MASK) | WAITCNT_SRAM_8;
return result;
}
u16 EraseFlashSector_MX(u16 sectorNum)
{
u16 numTries;
u16 result;
u8 *addr;
u16 readFlash1Buffer[0x20];
if (sectorNum >= gFlash->sector.count)
return 0x80FF;
SwitchFlashBank(sectorNum / SECTORS_PER_BANK);
sectorNum %= SECTORS_PER_BANK;
numTries = 0;
try_erase:
REG_WAITCNT = (REG_WAITCNT & ~WAITCNT_SRAM_MASK) | gFlash->wait[0];
addr = FLASH_BASE + (sectorNum << gFlash->sector.shift);
FLASH_WRITE(0x5555, 0xAA);
FLASH_WRITE(0x2AAA, 0x55);
FLASH_WRITE(0x5555, 0x80);
FLASH_WRITE(0x5555, 0xAA);
FLASH_WRITE(0x2AAA, 0x55);
*addr = 0x30;
SetReadFlash1(readFlash1Buffer);
result = WaitForFlashWrite(2, addr, 0xFF);
if (!(result & 0xA000) || numTries > 3)
goto done;
numTries++;
goto try_erase;
done:
REG_WAITCNT = (REG_WAITCNT & ~WAITCNT_SRAM_MASK) | WAITCNT_SRAM_8;
return result;
}
u16 ProgramFlashByte_MX(u16 sectorNum, u32 offset, u8 data)
{
u8 *addr;
u16 readFlash1Buffer[0x20];
if (offset >= gFlash->sector.size)
return 0x8000;
SwitchFlashBank(sectorNum / SECTORS_PER_BANK);
sectorNum %= SECTORS_PER_BANK;
addr = FLASH_BASE + (sectorNum << gFlash->sector.shift) + offset;
SetReadFlash1(readFlash1Buffer);
REG_WAITCNT = (REG_WAITCNT & ~WAITCNT_SRAM_MASK) | gFlash->wait[0];
FLASH_WRITE(0x5555, 0xAA);
FLASH_WRITE(0x2AAA, 0x55);
FLASH_WRITE(0x5555, 0xA0);
*addr = data;
return WaitForFlashWrite(1, addr, data);
}
static u16 ProgramByte(u8 *src, u8 *dest)
{
FLASH_WRITE(0x5555, 0xAA);
FLASH_WRITE(0x2AAA, 0x55);
FLASH_WRITE(0x5555, 0xA0);
*dest = *src;
return WaitForFlashWrite(1, dest, *src);
}
u16 ProgramFlashSector_MX(u16 sectorNum, u8 *src)
{
u16 result;
u8 *dest;
u16 readFlash1Buffer[0x20];
if (sectorNum >= gFlash->sector.count)
return 0x80FF;
result = EraseFlashSector_MX(sectorNum);
if (result != 0)
return result;
SwitchFlashBank(sectorNum / SECTORS_PER_BANK);
sectorNum %= SECTORS_PER_BANK;
SetReadFlash1(readFlash1Buffer);
REG_WAITCNT = (REG_WAITCNT & ~WAITCNT_SRAM_MASK) | gFlash->wait[0];
gFlashNumRemainingBytes = gFlash->sector.size;
dest = FLASH_BASE + (sectorNum << gFlash->sector.shift);
while (gFlashNumRemainingBytes > 0)
{
result = ProgramByte(src, dest);
if (result != 0)
break;
gFlashNumRemainingBytes--;
src++;
dest++;
}
return result;
}
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