static rt_err_t nand_mtd_write (
struct rt_mtd_nand_device * dev,
rt_off_t page,
const rt_uint8_t * data, rt_uint32_t data_len,//will be 2048 always!
const rt_uint8_t * spare, rt_uint32_t spare_len)
{
rt_err_t result=RT_EOK;
int i;
rt_mutex_take(&nand, RT_WAITING_FOREVER);
if (data != RT_NULL && data_len != 0)
{
// get offset of sst39vf's write position
rt_uint32_t page_offs = page*512;
for(i=0;i<data_len/2;i++)
Mem_Wr(*(rt_uint16_t *)((rt_uint16_t *)data+i),page_offs+i);
}
if (spare != RT_NULL && spare_len != 0)
{
// get spare offset of sst39vf's write position
rt_uint32_t spare_offs = page*16 + NOR_SPARE_BLOCK;
for(i=0;i<spare_len/2;i++)
Mem_Wr(*(rt_uint16_t *)((rt_uint16_t *)spare+i),spare_offs+i);
}
rt_mutex_release(&nand);
return result;
}
static rt_err_t nand_mtd_erase_block(
struct rt_mtd_nand_device* device,
rt_uint32_t block)
{
rt_err_t result=RT_EOK;
int i;
rt_uint16_t data=0xffff;
rt_uint32_t block_offs=block*32*512;
rt_uint32_t spare_offs = NOR_SPARE_BLOCK+block*32;
rt_mutex_take(&nand, RT_WAITING_FOREVER);
//erase block offs , len=one block size /2 , 16bit wr
for(i=0;i<(32*512)/2;i++)
Mem_Wr(data,block_offs+i);
//erase spare offs, len=one block spare size /2 , 16bit wr
for(i=0;i<(32*16)/2;i++)
Mem_Wr(data,spare_offs+i);
rt_mutex_release(&nand);
return result;
}
//#endif
int Mem_Check(unsigned long offset)
{
static rt_uint16_t test_data[2] = { 0x55AA, 0xAA55 };
rt_uint16_t tmp = 0x3C3C;
int ret = 1;
if (offset<PSRAM_CY) {
Mem_Wr ( test_data[0], offset);
Mem_Rd ( &tmp, offset);
if (tmp != test_data[0])
ret = 0;
Mem_Wr ( test_data[1], offset);
Mem_Rd ( &tmp, offset);
if (tmp != test_data[1])
ret = 0;
}
return (ret);
}
static rt_err_t nand_mtd_mark_bad_block(
struct rt_mtd_nand_device* device,
rt_uint32_t block)
{
rt_err_t result=RT_EOK;
rt_uint16_t data=0xff00;
rt_uint32_t spare_offs = NOR_SPARE_BLOCK+block*32;
rt_mutex_take(&nand, RT_WAITING_FOREVER);
//write spare_offs to 0xff00
Mem_Wr(data,spare_offs);
rt_mutex_release(&nand);
return result;
}
