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mtd: nand_mrvl_nfc: Add support for 8bit BCH HW ECC 

Add support for 8bit HW ECC modes supported by later IP versions.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sebastian Hesselbarth 2015-11-20 20:36:08 +01:00 committed by Sascha Hauer
parent 624bea7b14
commit f7d39e122e
1 changed files with 39 additions and 0 deletions
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39
drivers/mtd/nand/nand_mrvl_nfc.c
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@ -252,6 +252,17 @@ static struct nand_ecclayout ecc_layout_4KB_bch4bit = {
.oobfree = { {1, 4}, {6, 26}, {64, 32} }
};
static struct nand_ecclayout ecc_layout_4KB_bch8bit = {
.eccbytes = 64,
.eccpos = {
32, 33, 34, 35, 36, 37, 38, 39,
40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63},
/* Bootrom looks in bytes 0 & 5 for bad blocks */
.oobfree = { {1, 4}, {6, 26} }
};
#define NDTR0_tCH(c) (min((c), 7) << 19)
#define NDTR0_tCS(c) (min((c), 7) << 16)
#define NDTR0_tWH(c) (min((c), 7) << 11)
@ -928,6 +939,31 @@ static int pxa_ecc_strength4(struct mrvl_nand_host *host,
return -ENODEV;
}
static int pxa_ecc_strength8(struct mrvl_nand_host *host,
struct nand_ecc_ctrl *ecc, int ecc_stepsize, int page_size)
{
if (!(host->hwflags & HWFLAGS_ECC_BCH))
return -ENODEV;
/*
* Required ECC: 8-bit correction per 512 bytes
* Select: 16-bit correction per 1024 bytes
*/
if (ecc_stepsize == 512 && page_size == 4096) {
host->chunk_size = 1024;
host->spare_size = 0;
host->ecc_size = 32;
host->ecc_bch = 1;
ecc->mode = NAND_ECC_HW;
ecc->size = 1024;
ecc->layout = &ecc_layout_4KB_bch8bit;
ecc->strength = 16;
return 0;
}
return -ENODEV;
}
static int pxa_ecc_init(struct mrvl_nand_host *host,
struct nand_ecc_ctrl *ecc,
int strength, int ecc_stepsize, int page_size)
@ -941,6 +977,9 @@ static int pxa_ecc_init(struct mrvl_nand_host *host,
case 4:
ret = pxa_ecc_strength4(host, ecc, ecc_stepsize, page_size);
break;
case 8:
ret = pxa_ecc_strength8(host, ecc, ecc_stepsize, page_size);
break;
default:
ret = -ENODEV;
break;