leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

spl mxc nand: Fix broken boot for correctable ECC errors

Browse Source 
Do not stop boot as soon as an ECC error is detected. Only stop boot for
uncorrectable ECC errors.

This fixes boards no longer booting after some time because a NAND Flash bit has
flipped.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Benoît Thébaudeau 2012-08-13 22:49:53 +02:00 committed by Scott Wood
parent c1db8dd62b
commit b8fea2b27d
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
nand_spl/nand_boot_fsl_nfc.c
View File

@ -140,9 +140,21 @@ static void nfc_nand_data_output(void)
static int nfc_nand_check_ecc(void)
{
#if defined(MXC_NFC_V1)
return readw(&nfc->ecc_status_result);
u16 ecc_status = readw(&nfc->ecc_status_result);
return (ecc_status & 0x3) == 2 || (ecc_status >> 2) == 2;
#elif defined(MXC_NFC_V1_1)
return readl(&nfc->ecc_status_result);
u32 ecc_status = readl(&nfc->ecc_status_result);
int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512;
int err_limit = CONFIG_SYS_NAND_SPARE_SIZE / ecc_per_page > 16 ? 8 : 4;
int subpages = CONFIG_SYS_NAND_PAGE_SIZE / 512;
do {
if ((ecc_status & 0xf) > err_limit)
return 1;
ecc_status >>= 4;
} while (--subpages);
return 0;
#endif
}