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mtd: nand: atmel: switch to mtd_ooblayout_ops 

Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Boris Brezillon 2016-02-03 19:59:11 +01:00
parent 50533187ee
commit cc00383722
1 changed files with 38 additions and 46 deletions
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84
drivers/mtd/nand/atmel_nand.c
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@ -71,30 +71,44 @@ struct atmel_nand_nfc_caps {
uint32_t rb_mask;
};
/* oob layout for large page size
/*
* oob layout for large page size
* bad block info is on bytes 0 and 1
* the bytes have to be consecutives to avoid
* several NAND_CMD_RNDOUT during read
*/
static struct nand_ecclayout atmel_oobinfo_large = {
.eccbytes = 4,
.eccpos = {60, 61, 62, 63},
.oobfree = {
{2, 58}
},
};
/* oob layout for small page size
*
* oob layout for small page size
* bad block info is on bytes 4 and 5
* the bytes have to be consecutives to avoid
* several NAND_CMD_RNDOUT during read
*/
static struct nand_ecclayout atmel_oobinfo_small = {
.eccbytes = 4,
.eccpos = {0, 1, 2, 3},
.oobfree = {
{6, 10}
},
static int atmel_ooblayout_ecc_sp(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section)
return -ERANGE;
oobregion->length = 4;
oobregion->offset = 0;
return 0;
}
static int atmel_ooblayout_free_sp(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section)
return -ERANGE;
oobregion->offset = 6;
oobregion->length = mtd->oobsize - oobregion->offset;
return 0;
}
static const struct mtd_ooblayout_ops atmel_ooblayout_sp_ops = {
.ecc = atmel_ooblayout_ecc_sp,
.free = atmel_ooblayout_free_sp,
};
struct atmel_nfc {
@ -162,8 +176,6 @@ struct atmel_nand_host {
int *pmecc_delta;
};
static struct nand_ecclayout atmel_pmecc_oobinfo;
/*
* Enable NAND.
*/
@ -480,22 +492,6 @@ static int pmecc_get_ecc_bytes(int cap, int sector_size)
return (m * cap + 7) / 8;
}
static void pmecc_config_ecc_layout(struct nand_ecclayout *layout,
int oobsize, int ecc_len)
{
int i;
layout->eccbytes = ecc_len;
/* ECC will occupy the last ecc_len bytes continuously */
for (i = 0; i < ecc_len; i++)
layout->eccpos[i] = oobsize - ecc_len + i;
layout->oobfree[0].offset = PMECC_OOB_RESERVED_BYTES;
layout->oobfree[0].length =
oobsize - ecc_len - layout->oobfree[0].offset;
}
static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host)
{
int table_size;
@ -1012,8 +1008,8 @@ static void atmel_pmecc_core_init(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
int eccbytes = mtd_ooblayout_count_eccbytes(mtd);
uint32_t val = 0;
struct nand_ecclayout *ecc_layout;
struct mtd_oob_region oobregion;
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST);
@ -1064,12 +1060,11 @@ static void atmel_pmecc_core_init(struct mtd_info *mtd)
| PMECC_CFG_AUTO_DISABLE);
pmecc_writel(host->ecc, CFG, val);
ecc_layout = nand_chip->ecc.layout;
pmecc_writel(host->ecc, SAREA, mtd->oobsize - 1);
mtd_ooblayout_ecc(mtd, 0, &oobregion);
pmecc_writel(host->ecc, SADDR, oobregion.offset);
pmecc_writel(host->ecc, EADDR,
oobregion.offset + ecc_layout->eccbytes - 1);
oobregion.offset + eccbytes - 1);
/* See datasheet about PMECC Clock Control Register */
pmecc_writel(host->ecc, CLK, 2);
pmecc_writel(host->ecc, IDR, 0xff);
@ -1291,11 +1286,8 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
err_no = -EINVAL;
goto err;
}
pmecc_config_ecc_layout(&atmel_pmecc_oobinfo,
mtd->oobsize,
nand_chip->ecc.total);
nand_chip->ecc.layout = &atmel_pmecc_oobinfo;
mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
break;
default:
dev_warn(host->dev,
@ -1650,19 +1642,19 @@ static int atmel_hw_nand_init_params(struct platform_device *pdev,
/* set ECC page size and oob layout */
switch (mtd->writesize) {
case 512:
nand_chip->ecc.layout = &atmel_oobinfo_small;
mtd_set_ooblayout(mtd, &atmel_ooblayout_sp_ops);
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
break;
case 1024:
nand_chip->ecc.layout = &atmel_oobinfo_large;
mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_1056);
break;
case 2048:
nand_chip->ecc.layout = &atmel_oobinfo_large;
mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_2112);
break;
case 4096:
nand_chip->ecc.layout = &atmel_oobinfo_large;
mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_4224);
break;
default: