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mtd: nand: davinci: 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>
This commit is contained in:
Boris Brezillon 2016-02-03 19:59:58 +01:00
parent a8ed6e66f3
commit e4aacaa1b1
1 changed files with 44 additions and 74 deletions
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118
drivers/mtd/nand/davinci_nand.c
View File

@ -54,7 +54,6 @@
*/
struct davinci_nand_info {
struct nand_chip chip;
struct nand_ecclayout ecclayout;
struct device *dev;
struct clk *clk;
@ -480,63 +479,46 @@ static int nand_davinci_dev_ready(struct mtd_info *mtd)
* ten ECC bytes plus the manufacturer's bad block marker byte, and
* and not overlapping the default BBT markers.
*/
static struct nand_ecclayout hwecc4_small = {
.eccbytes = 10,
.eccpos = { 0, 1, 2, 3, 4,
/* offset 5 holds the badblock marker */
6, 7,
13, 14, 15, },
.oobfree = {
{.offset = 8, .length = 5, },
{.offset = 16, },
},
};
static int hwecc4_ooblayout_small_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section > 2)
return -ERANGE;
/* An ECC layout for using 4-bit ECC with large-page (2048bytes) flash,
* storing ten ECC bytes plus the manufacturer's bad block marker byte,
* and not overlapping the default BBT markers.
*/
static struct nand_ecclayout hwecc4_2048 = {
.eccbytes = 40,
.eccpos = {
/* at the end of spare sector */
24, 25, 26, 27, 28, 29, 30, 31, 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,
},
.oobfree = {
/* 2 bytes at offset 0 hold manufacturer badblock markers */
{.offset = 2, .length = 22, },
/* 5 bytes at offset 8 hold BBT markers */
/* 8 bytes at offset 16 hold JFFS2 clean markers */
},
};
if (!section) {
oobregion->offset = 0;
oobregion->length = 5;
} else if (section == 1) {
oobregion->offset = 6;
oobregion->length = 2;
} else {
oobregion->offset = 13;
oobregion->length = 3;
}
/*
* An ECC layout for using 4-bit ECC with large-page (4096bytes) flash,
* storing ten ECC bytes plus the manufacturer's bad block marker byte,
* and not overlapping the default BBT markers.
*/
static struct nand_ecclayout hwecc4_4096 = {
.eccbytes = 80,
.eccpos = {
/* at the end of spare sector */
48, 49, 50, 51, 52, 53, 54, 55, 56, 57,
58, 59, 60, 61, 62, 63, 64, 65, 66, 67,
68, 69, 70, 71, 72, 73, 74, 75, 76, 77,
78, 79, 80, 81, 82, 83, 84, 85, 86, 87,
88, 89, 90, 91, 92, 93, 94, 95, 96, 97,
98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
},
.oobfree = {
/* 2 bytes at offset 0 hold manufacturer badblock markers */
{.offset = 2, .length = 46, },
/* 5 bytes at offset 8 hold BBT markers */
/* 8 bytes at offset 16 hold JFFS2 clean markers */
},
return 0;
}
static int hwecc4_ooblayout_small_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section > 1)
return -ERANGE;
if (!section) {
oobregion->offset = 8;
oobregion->length = 5;
} else {
oobregion->offset = 16;
oobregion->length = mtd->oobsize - 16;
}
return 0;
}
static const struct mtd_ooblayout_ops hwecc4_small_ooblayout_ops = {
.ecc = hwecc4_ooblayout_small_ecc,
.free = hwecc4_ooblayout_small_free,
};
#if defined(CONFIG_OF)
@ -805,26 +787,14 @@ static int nand_davinci_probe(struct platform_device *pdev)
* table marker fits in the free bytes.
*/
if (chunks == 1) {
info->ecclayout = hwecc4_small;
info->ecclayout.oobfree[1].length = mtd->oobsize - 16;
goto syndrome_done;
}
if (chunks == 4) {
info->ecclayout = hwecc4_2048;
mtd_set_ooblayout(mtd, &hwecc4_small_ooblayout_ops);
} else if (chunks == 4 || chunks == 8) {
mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
info->chip.ecc.mode = NAND_ECC_HW_OOB_FIRST;
goto syndrome_done;
} else {
ret = -EIO;
goto err;
}
if (chunks == 8) {
info->ecclayout = hwecc4_4096;
info->chip.ecc.mode = NAND_ECC_HW_OOB_FIRST;
goto syndrome_done;
}
ret = -EIO;
goto err;
syndrome_done:
info->chip.ecc.layout = &info->ecclayout;
}
ret = nand_scan_tail(mtd);