diff options
Diffstat (limited to 'drivers/mtd/nand/omap_elm.c')
| -rw-r--r-- | drivers/mtd/nand/omap_elm.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/drivers/mtd/nand/omap_elm.c b/drivers/mtd/nand/omap_elm.c index 47b1f1bfe2..d963e6c07c 100644 --- a/drivers/mtd/nand/omap_elm.c +++ b/drivers/mtd/nand/omap_elm.c @@ -16,23 +16,21 @@ #include <common.h> #include <asm/io.h> #include <asm/errno.h> -#include <linux/mtd/omap_gpmc.h> #include <linux/mtd/omap_elm.h> #include <asm/arch/hardware.h> +#define DRIVER_NAME "omap-elm" #define ELM_DEFAULT_POLY (0) struct elm *elm_cfg; /** - * elm_load_syndromes - Load BCH syndromes based on nibble selection + * elm_load_syndromes - Load BCH syndromes based on bch_type selection * @syndrome: BCH syndrome - * @nibbles: + * @bch_type: BCH4/BCH8/BCH16 * @poly: Syndrome Polynomial set to use - * - * Load BCH syndromes based on nibble selection */ -static void elm_load_syndromes(u8 *syndrome, u32 nibbles, u8 poly) +static void elm_load_syndromes(u8 *syndrome, enum bch_level bch_type, u8 poly) { u32 *ptr; u32 val; @@ -48,8 +46,7 @@ static void elm_load_syndromes(u8 *syndrome, u32 nibbles, u8 poly) (syndrome[7] << 24); writel(val, ptr); - /* BCH 8-bit with 26 nibbles (4*8=32) */ - if (nibbles > 13) { + if (bch_type == BCH_8_BIT || bch_type == BCH_16_BIT) { /* reg 2 */ ptr = &elm_cfg->syndrome_fragments[poly].syndrome_fragment_x[2]; val = syndrome[8] | (syndrome[9] << 8) | (syndrome[10] << 16) | @@ -62,8 +59,7 @@ static void elm_load_syndromes(u8 *syndrome, u32 nibbles, u8 poly) writel(val, ptr); } - /* BCH 16-bit with 52 nibbles (7*8=56) */ - if (nibbles > 26) { + if (bch_type == BCH_16_BIT) { /* reg 4 */ ptr = &elm_cfg->syndrome_fragments[poly].syndrome_fragment_x[4]; val = syndrome[16] | (syndrome[17] << 8) | @@ -87,7 +83,7 @@ static void elm_load_syndromes(u8 *syndrome, u32 nibbles, u8 poly) /** * elm_check_errors - Check for BCH errors and return error locations * @syndrome: BCH syndrome - * @nibbles: + * @bch_type: BCH4/BCH8/BCH16 * @error_count: Returns number of errrors in the syndrome * @error_locations: Returns error locations (in decimal) in this array * @@ -95,14 +91,14 @@ static void elm_load_syndromes(u8 *syndrome, u32 nibbles, u8 poly) * and locations in the array passed. Returns -1 if error is not correctable, * else returns 0 */ -int elm_check_error(u8 *syndrome, u32 nibbles, u32 *error_count, +int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count, u32 *error_locations) { u8 poly = ELM_DEFAULT_POLY; s8 i; u32 location_status; - elm_load_syndromes(syndrome, nibbles, poly); + elm_load_syndromes(syndrome, bch_type, poly); /* start processing */ writel((readl(&elm_cfg->syndrome_fragments[poly].syndrome_fragment_x[6]) @@ -118,8 +114,10 @@ int elm_check_error(u8 *syndrome, u32 nibbles, u32 *error_count, /* check if correctable */ location_status = readl(&elm_cfg->error_location[poly].location_status); - if (!(location_status & ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK)) - return -1; + if (!(location_status & ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK)) { + printf("%s: uncorrectable ECC errors\n", DRIVER_NAME); + return -EBADMSG; + } /* get error count */ *error_count = readl(&elm_cfg->error_location[poly].location_status) & |