int nand_read(unsigned int nand_start, unsigned int ddr_start, unsigned int len)
{
unsigned int addr = nand_start;
int i, count = 0;
unsigned char *dest = (unsigned char *)ddr_start;
/* 选中芯片 */
nand_select();
while (count < len)
{
/* 发出命令0x00 */
nand_cmd(0x00);
/* 发出地址 */
nand_send_addr(addr);
/* 发出命令0x30 */
nand_cmd(0x30);
/* 等待就绪 */
wait_ready();
/* 读数据 */
for (i = 0; i < 2048 && count < len; i++)
{
dest[count++] = nand_get_data();
}
addr += 2048;
}
/* 取消片选 */
nand_deselect();
return 0;
}
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;
}