diff options
author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2015-12-07 21:46:45 (GMT) |
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committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-05-05 21:51:49 (GMT) |
commit | a411679fb5fd7ee2df64a55c23c81538ceeb6d06 (patch) | |
tree | 38fe2b4bead9c9297085503341dc26c632822ebd /drivers/mtd/onenand | |
parent | 421e81c4c6c03a5f6cbc40ea208fb07ad5797e09 (diff) | |
download | linux-a411679fb5fd7ee2df64a55c23c81538ceeb6d06.tar.xz |
mtd: onenand: switch to mtd_ooblayout_ops
Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users. Modify the onenand drivers to switch to this
approach.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd/onenand')
-rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 162 |
1 files changed, 97 insertions, 65 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index d0fa505..a4b029a 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -68,21 +68,33 @@ MODULE_PARM_DESC(otp, "Corresponding behaviour of OneNAND in OTP" * flexonenand_oob_128 - oob info for Flex-Onenand with 4KB page * For now, we expose only 64 out of 80 ecc bytes */ -static struct nand_ecclayout flexonenand_oob_128 = { - .eccbytes = 64, - .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, - 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, - 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, - 102, 103, 104, 105 - }, - .oobfree = { - {2, 4}, {18, 4}, {34, 4}, {50, 4}, - {66, 4}, {82, 4}, {98, 4}, {114, 4} - } +static int flexonenand_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section > 7) + return -ERANGE; + + oobregion->offset = (section * 16) + 6; + oobregion->length = 10; + + return 0; +} + +static int flexonenand_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section > 7) + return -ERANGE; + + oobregion->offset = (section * 16) + 2; + oobregion->length = 4; + + return 0; +} + +static const struct mtd_ooblayout_ops flexonenand_ooblayout_ops = { + .ecc = flexonenand_ooblayout_ecc, + .free = flexonenand_ooblayout_free, }; /* @@ -91,56 +103,77 @@ static struct nand_ecclayout flexonenand_oob_128 = { * Based on specification: * 4Gb M-die OneNAND Flash (KFM4G16Q4M, KFN8G16Q4M). Rev. 1.3, Apr. 2010 * - * For eccpos we expose only 64 bytes out of 72 (see struct nand_ecclayout) - * - * oobfree uses the spare area fields marked as - * "Managed by internal ECC logic for Logical Sector Number area" - */ -static struct nand_ecclayout onenand_oob_128 = { - .eccbytes = 64, - .eccpos = { - 7, 8, 9, 10, 11, 12, 13, 14, 15, - 23, 24, 25, 26, 27, 28, 29, 30, 31, - 39, 40, 41, 42, 43, 44, 45, 46, 47, - 55, 56, 57, 58, 59, 60, 61, 62, 63, - 71, 72, 73, 74, 75, 76, 77, 78, 79, - 87, 88, 89, 90, 91, 92, 93, 94, 95, - 103, 104, 105, 106, 107, 108, 109, 110, 111, - 119 - }, - .oobfree = { - {2, 3}, {18, 3}, {34, 3}, {50, 3}, - {66, 3}, {82, 3}, {98, 3}, {114, 3} - } + */ +static int onenand_ooblayout_128_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section > 7) + return -ERANGE; + + oobregion->offset = (section * 16) + 7; + oobregion->length = 9; + + return 0; +} + +static int onenand_ooblayout_128_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section >= 8) + return -ERANGE; + + /* + * free bytes are using the spare area fields marked as + * "Managed by internal ECC logic for Logical Sector Number area" + */ + oobregion->offset = (section * 16) + 2; + oobregion->length = 3; + + return 0; +} + +static const struct mtd_ooblayout_ops onenand_oob_128_ooblayout_ops = { + .ecc = onenand_ooblayout_128_ecc, + .free = onenand_ooblayout_128_free, }; /** - * onenand_oob_64 - oob info for large (2KB) page + * onenand_oob_32_64 - oob info for large (2KB) page */ -static struct nand_ecclayout onenand_oob_64 = { - .eccbytes = 20, - .eccpos = { - 8, 9, 10, 11, 12, - 24, 25, 26, 27, 28, - 40, 41, 42, 43, 44, - 56, 57, 58, 59, 60, - }, - .oobfree = { - {2, 3}, {14, 2}, {18, 3}, {30, 2}, - {34, 3}, {46, 2}, {50, 3}, {62, 2} +static int onenand_ooblayout_32_64_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + if (section > 3) + return -ERANGE; + + oobregion->offset = (section * 16) + 8; + oobregion->length = 5; + + return 0; +} + +static int onenand_ooblayout_32_64_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + int sections = (mtd->oobsize / 32) * 2; + + if (section >= sections) + return -ERANGE; + + if (section & 1) { + oobregion->offset = ((section - 1) * 16) + 14; + oobregion->length = 2; + } else { + oobregion->offset = (section * 16) + 2; + oobregion->length = 3; } -}; -/** - * onenand_oob_32 - oob info for middle (1KB) page - */ -static struct nand_ecclayout onenand_oob_32 = { - .eccbytes = 10, - .eccpos = { - 8, 9, 10, 11, 12, - 24, 25, 26, 27, 28, - }, - .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} } + return 0; +} + +static const struct mtd_ooblayout_ops onenand_oob_32_64_ooblayout_ops = { + .ecc = onenand_ooblayout_32_64_ecc, + .free = onenand_ooblayout_32_64_free, }; static const unsigned char ffchars[] = { @@ -3957,22 +3990,22 @@ int onenand_scan(struct mtd_info *mtd, int maxchips) switch (mtd->oobsize) { case 128: if (FLEXONENAND(this)) { - this->ecclayout = &flexonenand_oob_128; + mtd_set_ooblayout(mtd, &flexonenand_ooblayout_ops); mtd->subpage_sft = 0; } else { - this->ecclayout = &onenand_oob_128; + mtd_set_ooblayout(mtd, &onenand_oob_128_ooblayout_ops); mtd->subpage_sft = 2; } if (ONENAND_IS_NOP_1(this)) mtd->subpage_sft = 0; break; case 64: - this->ecclayout = &onenand_oob_64; + mtd_set_ooblayout(mtd, &onenand_oob_32_64_ooblayout_ops); mtd->subpage_sft = 2; break; case 32: - this->ecclayout = &onenand_oob_32; + mtd_set_ooblayout(mtd, &onenand_oob_32_64_ooblayout_ops); mtd->subpage_sft = 1; break; @@ -3981,7 +4014,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips) __func__, mtd->oobsize); mtd->subpage_sft = 0; /* To prevent kernel oops */ - this->ecclayout = &onenand_oob_32; + mtd_set_ooblayout(mtd, &onenand_oob_32_64_ooblayout_ops); break; } @@ -3997,7 +4030,6 @@ int onenand_scan(struct mtd_info *mtd, int maxchips) mtd->oobavail = ret; - mtd_set_ecclayout(mtd, this->ecclayout); mtd->ecc_strength = 1; /* Fill in remaining MTD driver data */ |