korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-19 10:14:23 +08:00
Code Issues Packages Projects Releases Wiki Activity

mtd: nand: lpc32xx: switch to mtd_ooblayout_ops

Browse Source 
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>
This commit is contained in:
Boris Brezillon 2016-02-03 20:02:41 +01:00
parent 36886be7dd
commit d50b523986
2 changed files with 66 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/mtd/nand/lpc32xx_mlc.c
View File

@ -138,22 +138,37 @@ struct lpc32xx_nand_cfg_mlc {
unsigned num_parts;
};
static struct nand_ecclayout lpc32xx_nand_oob = {
.eccbytes = 40,
.eccpos = { 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
54, 55, 56, 57, 58, 59, 60, 61, 62, 63 },
.oobfree = {
{ .offset = 0,
.length = 6, },
{ .offset = 16,
.length = 6, },
{ .offset = 32,
.length = 6, },
{ .offset = 48,
.length = 6, },
},
static int lpc32xx_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
if (section >= nand_chip->ecc.steps)
return -ERANGE;
oobregion->offset = ((section + 1) * 16) - nand_chip->ecc.bytes;
oobregion->length = nand_chip->ecc.bytes;
return 0;
}
static int lpc32xx_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
if (section >= nand_chip->ecc.steps)
return -ERANGE;
oobregion->offset = 16 * section;
oobregion->length = 16 - nand_chip->ecc.bytes;
return 0;
}
static const struct mtd_ooblayout_ops lpc32xx_ooblayout_ops = {
.ecc = lpc32xx_ooblayout_ecc,
.free = lpc32xx_ooblayout_free,
};
static struct nand_bbt_descr lpc32xx_nand_bbt = {
@ -712,6 +727,7 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
nand_chip->ecc.write_oob = lpc32xx_write_oob;
nand_chip->ecc.read_oob = lpc32xx_read_oob;
nand_chip->ecc.strength = 4;
nand_chip->ecc.bytes = 10;
nand_chip->waitfunc = lpc32xx_waitfunc;
nand_chip->options = NAND_NO_SUBPAGE_WRITE;
@ -750,7 +766,7 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
nand_chip->ecc.mode = NAND_ECC_HW;
nand_chip->ecc.size = 512;
nand_chip->ecc.layout = &lpc32xx_nand_oob;
mtd_set_ooblayout(mtd, &lpc32xx_ooblayout_ops);
host->mlcsubpages = mtd->writesize / 512;
/* initially clear interrupt status */

41
drivers/mtd/nand/lpc32xx_slc.c
View File

@ -146,13 +146,38 @@
* NAND ECC Layout for small page NAND devices
* Note: For large and huge page devices, the default layouts are used
*/
static struct nand_ecclayout lpc32xx_nand_oob_16 = {
.eccbytes = 6,
.eccpos = {10, 11, 12, 13, 14, 15},
.oobfree = {
{ .offset = 0, .length = 4 },
{ .offset = 6, .length = 4 },
},
static int lpc32xx_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section)
return -ERANGE;
oobregion->length = 6;
oobregion->offset = 10;
return 0;
}
static int lpc32xx_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section > 1)
return -ERANGE;
if (!section) {
oobregion->offset = 0;
oobregion->length = 4;
} else {
oobregion->offset = 6;
oobregion->length = 4;
}
return 0;
}
static const struct mtd_ooblayout_ops lpc32xx_ooblayout_ops = {
.ecc = lpc32xx_ooblayout_ecc,
.free = lpc32xx_ooblayout_free,
};
static u8 bbt_pattern[] = {'B', 'b', 't', '0' };
@ -886,7 +911,7 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
* custom BBT marker layout.
*/
if (mtd->writesize <= 512)
chip->ecc.layout = &lpc32xx_nand_oob_16;
mtd_set_ooblayout(mtd, &lpc32xx_ooblayout_ops);
/* These sizes remain the same regardless of page size */
chip->ecc.size = 256;