int VFL_Verify(void)
{
int i;
int foundSignature = false;
LOGDBG("ftl: Attempting to read %d pages from first block of first bank.\n", NANDGeometry->pagesPerBlock);
for(i = 0; i < NANDGeometry->pagesPerBlock; i++) {
int ret;
if((ret = nand_read_alternate_ecc(0, i, PageBuffer)) == 0) {
u32 id = *((u32*) PageBuffer);
if(id == FTL_ID_V1 || id == FTL_ID_V2 || id == FTL_ID_V3) {
LOG("ftl: Found production format: %x\n", id);
foundSignature = true;
break;
} else {
LOGDBG("ftl: Found non-matching signature: %x\n", ((u32*) PageBuffer));
}
} else {
LOGDBG("ftl: page %d of first bank is unreadable: %x!\n", i, ret);
}
}
if(!foundSignature || !hasDeviceInfoBBT()) {
LOG("ftl: no signature or production format.\n");
return -1;
}
return 0;
}
static bool findDeviceInfoBBT(int bank, void* deviceInfoBBT)
{
int lowestBlock = NANDGeometry->blocksPerBank - (NANDGeometry->blocksPerBank / 10);
int block;
for(block = NANDGeometry->blocksPerBank - 1; block >= lowestBlock; block--) {
int page;
int badBlockCount = 0;
for(page = 0; page < NANDGeometry->pagesPerBlock; page++) {
int ret;
if(badBlockCount > 2) {
LOGDBG("ftl: findDeviceInfoBBT - too many bad pages, skipping block %d\n", block);
break;
}
ret = nand_read_alternate_ecc(bank, (block * NANDGeometry->pagesPerBlock) + page, PageBuffer);
if(ret != 0) {
if(ret == 1) {
LOGDBG("ftl: findDeviceInfoBBT - found 'badBlock' on bank %d, page %d\n", (block * NANDGeometry->pagesPerBlock) + page);
badBlockCount++;
}
LOGDBG("ftl: findDeviceInfoBBT - skipping bank %d, page %d\n", (block * NANDGeometry->pagesPerBlock) + page);
continue;
}
if(memcmp(PageBuffer, "DEVICEINFOBBT\0\0\0", 16) == 0) {
if(deviceInfoBBT) {
memcpy(deviceInfoBBT, PageBuffer + 0x38, *((u32*)(PageBuffer + 0x34)));
}
return true;
} else {
LOGDBG("ftl: did not find signature on bank %d, page %d\n", (block * NANDGeometry->pagesPerBlock) + page);
}
}
}
return false;
}
static int findDeviceInfoBBT(int bank, void* deviceInfoBBT) {
uint8_t* buffer = malloc(Data->bytesPerPage);
int lowestBlock = Data->blocksPerBank - (Data->blocksPerBank / 10);
int block;
for(block = Data->blocksPerBank - 1; block >= lowestBlock; block--) {
int page;
int badBlockCount = 0;
for(page = 0; page < Data->pagesPerBlock; page++) {
if(badBlockCount > 2) {
DebugPrintf("ftl: findDeviceInfoBBT - too many bad pages, skipping block %d\r\n", block);
break;
}
int ret = nand_read_alternate_ecc(bank, (block * Data->pagesPerBlock) + page, buffer);
if(ret != 0) {
if(ret == 1) {
DebugPrintf("ftl: findDeviceInfoBBT - found 'badBlock' on bank %d, page %d\r\n", (block * Data->pagesPerBlock) + page);
badBlockCount++;
}
DebugPrintf("ftl: findDeviceInfoBBT - skipping bank %d, page %d\r\n", (block * Data->pagesPerBlock) + page);
continue;
}
if(memcmp(buffer, "DEVICEINFOBBT\0\0\0", 16) == 0) {
if(deviceInfoBBT) {
memcpy(deviceInfoBBT, buffer + 0x38, *((uint32_t*)(buffer + 0x34)));
}
free(buffer);
return TRUE;
} else {
DebugPrintf("ftl: did not find signature on bank %d, page %d\r\n", (block * Data->pagesPerBlock) + page);
}
}
}
free(buffer);
return FALSE;
}
int ftl_setup() {
if(HasFTLInit)
return 0;
nand_setup();
Data = nand_get_geometry();
Data2 = nand_get_data();
if(VFL_Init() != 0) {
bufferPrintf("ftl: VFL_Init failed\r\n");
return -1;
}
if(FTL_Init() != 0) {
bufferPrintf("ftl: FTL_Init failed\r\n");
return -1;
}
int i;
int foundSignature = FALSE;
DebugPrintf("ftl: Attempting to read %d pages from first block of first bank.\r\n", Data->pagesPerBlock);
uint8_t* buffer = malloc(Data->bytesPerPage);
for(i = 0; i < Data->pagesPerBlock; i++) {
int ret;
if((ret = nand_read_alternate_ecc(0, i, buffer)) == 0) {
uint32_t id = *((uint32_t*) buffer);
if(id == FTL_ID_V1 || id == FTL_ID_V2) {
bufferPrintf("ftl: Found production format: %x\r\n", id);
foundSignature = TRUE;
break;
} else {
DebugPrintf("ftl: Found non-matching signature: %x\r\n", ((uint32_t*) buffer));
}
} else {
DebugPrintf("ftl: page %d of first bank is unreadable: %x!\r\n", i, ret);
}
}
free(buffer);
if(!foundSignature || !hasDeviceInfoBBT()) {
bufferPrintf("ftl: no signature or production format.\r\n");
return -1;
}
if(VFL_Open() != 0) {
bufferPrintf("ftl: VFL_Open failed\r\n");
return -1;
}
int pagesAvailable;
int bytesPerPage;
if(FTL_Open(&pagesAvailable, &bytesPerPage) != 0) {
bufferPrintf("ftl: FTL_Open failed\r\n");
return -1;
}
HasFTLInit = TRUE;
return 0;
}