Am Dienstag, 4. Februar 2014 16:42:28 UTC+1 schrieb st...@gmx.li:
>
> Can someone please give me a hint howto send a command to a flash chip, in
> my case to enable on-die-ecc?
>
> I found at some place how to read the byte, but I don't understand how to
> modify it for write (chip->write_byte isn't the way):
>
>
> * ############################################## */
> /* MICRON: Test on-die ECC status; return: 1/On or 0/Off */
> int test_on_die_ecc(struct mtd_info *mtd)
> {
> struct nand_chip *chip = mtd->priv;
> int addr = 0x90;
> uint8_t data, data_;
> chip->cmdfunc(mtd,NAND_CMD_GET_FEATURES,addr,-1);
> ndelay(2000);
> data = chip->read_byte(mtd);
> return((data & 0x08) ? 1 : 0 );
> }
>
>
> ---
> Can you help me what do I have to do send this below?
>
> ECC can be enabled using the following sequence:
> EFh(cmd)-90h(addr)-08h(data)-00h(data)-00h(data)-00h(data)-wait(tFEAT).
>
> ECC can be disabled using the following sequence:
> EFh(cmd)-90h(addr)-00h(data)-00h(data)-00h(data)-00h(data)-wait(tFEAT).
>
- 2 days later:
I could solve it on my own. :)
int set_on_die_ecc(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;
int addr = 0x90;
uint8_t buf[8] = {8,0,0,0,0,0,0,0};
chip->cmdfunc(mtd,NAND_CMD_SET_FEATURES,addr,-1);
ndelay(1000);
chip->write_buf(mtd, buf, 8);
printf("set_on_die_ecc\n");
OnDieECC_enabled = 1;
return ( 0 );
}
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