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atmel_nand: Add 32 bit ecc support for sama5d2 chip

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Also if minimum ecc requirment is bigger then what we support, then just
use our maxium pmecc support.
But it is not safe, so we'll output a warning about this.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Josh Wu 2015-11-24 16:34:01 +08:00 • committed by Andreas Bießmann
parent fa651f5d53
commit 258b21fc69
1 changed files with 9 additions and 1 deletions
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10
drivers/mtd/nand/atmel_nand.c
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@ -80,6 +80,7 @@ static struct nand_ecclayout atmel_pmecc_oobinfo;
* 8-bits 13-bytes 14-bytes * 8-bits 13-bytes 14-bytes
* 12-bits 20-bytes 21-bytes * 12-bits 20-bytes 21-bytes
* 24-bits 39-bytes 42-bytes * 24-bits 39-bytes 42-bytes
* 32-bits 52-bytes 56-bytes
*/ */
static int pmecc_get_ecc_bytes(int cap, int sector_size) static int pmecc_get_ecc_bytes(int cap, int sector_size)
{ {
@ -638,6 +639,9 @@ static void atmel_pmecc_core_init(struct mtd_info *mtd)
case 24: case 24:
val = PMECC_CFG_BCH_ERR24; val = PMECC_CFG_BCH_ERR24;
break; break;
case 32:
val = PMECC_CFG_BCH_ERR32;
break;
} }
if (host->pmecc_sector_size == 512) if (host->pmecc_sector_size == 512)
@ -723,7 +727,11 @@ static int pmecc_choose_ecc(struct atmel_nand_host *host,
else if (*cap <= 24) else if (*cap <= 24)
host->pmecc_corr_cap = 24; host->pmecc_corr_cap = 24;
else else
return -EINVAL; #ifdef CONFIG_SAMA5D2
host->pmecc_corr_cap = 32;
#else
host->pmecc_corr_cap = 24;
#endif
} }
if (host->pmecc_sector_size == 0) { if (host->pmecc_sector_size == 0) {
/* use the most fitable sector size (the near smaller one ) */ /* use the most fitable sector size (the near smaller one ) */