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authorAsh Charles <ashcharles@gmail.com>2015-02-18 11:25:11 -0800
committerTom Rini <trini@konsulko.com>2015-03-05 20:49:43 -0500
commitb050898efa6b4f0272f12885a7365f044ab4c08e (patch)
tree11f53adecf81f4c3732d61ebb43b7288de517856 /drivers/mtd/nand
parentd8af39337ea82403fb54a9d345d2e47fac4a8460 (diff)
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omap: gpmc: 'nandecc sw' can use HAM1 or BCH8
The 'nandecc sw' command selects a software-based error correction algorithm. By default, this is OMAP_ECC_HAM1_CODE_SW but some platforms use OMAP_ECC_BCH8_CODE_HW_DETECTION_SW as their software-based correction algorithm. Allow a user to be specific e.g. # nandecc sw <hamming|bch8> where 'hamming' is still the default. Note: we don't just use CONFIG_NAND_OMAP_ECCSCHEME as it might be set to a hardware-based ECC scheme---a little strange when the user has requested 'sw' ECC. Signed-off-by: Ash Charles <ashcharles@gmail.com>
Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r--drivers/mtd/nand/omap_gpmc.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c
index f8b0063..610f969 100644
--- a/drivers/mtd/nand/omap_gpmc.c
+++ b/drivers/mtd/nand/omap_gpmc.c
@@ -912,8 +912,18 @@ int __maybe_unused omap_nand_switch_ecc(uint32_t hardware, uint32_t eccstrength)
return -EINVAL;
}
} else {
- err = omap_select_ecc_scheme(nand, OMAP_ECC_HAM1_CODE_SW,
+ if (eccstrength == 1) {
+ err = omap_select_ecc_scheme(nand,
+ OMAP_ECC_HAM1_CODE_SW,
+ mtd->writesize, mtd->oobsize);
+ } else if (eccstrength == 8) {
+ err = omap_select_ecc_scheme(nand,
+ OMAP_ECC_BCH8_CODE_HW_DETECTION_SW,
mtd->writesize, mtd->oobsize);
+ } else {
+ printf("nand: error: unsupported ECC scheme\n");
+ return -EINVAL;
+ }
}
/* Update NAND handling after ECC mode switch */