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| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2012-08-13 22:49:53 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2012-09-17 19:51:45 -0500 |
| commit | b8fea2b27d7aeabd2e0bc4242277ff2787c7c622 (patch) | |
| tree | 64e33e0d40217f49b1e24b61cef834cf0d82261b | |
| parent | c1db8dd62b337372a08942e1c5945a8590afbc58 (diff) | |
| download | u-boot-imx-b8fea2b27d7aeabd2e0bc4242277ff2787c7c622.zip u-boot-imx-b8fea2b27d7aeabd2e0bc4242277ff2787c7c622.tar.gz u-boot-imx-b8fea2b27d7aeabd2e0bc4242277ff2787c7c622.tar.bz2 | |
spl mxc nand: Fix broken boot for correctable ECC errors
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>
| -rw-r--r-- | nand_spl/nand_boot_fsl_nfc.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/nand_spl/nand_boot_fsl_nfc.c b/nand_spl/nand_boot_fsl_nfc.c index 4c5a7fe..ea05952 100644 --- a/nand_spl/nand_boot_fsl_nfc.c +++ b/nand_spl/nand_boot_fsl_nfc.c @@ -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 } |