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>
This commit is contained in:
Boris Brezillon
parent
421e81c4c6
commit
a411679fb5
2 changed files with 97 additions and 67 deletions
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@ -68,21 +68,33 @@ MODULE_PARM_DESC(otp, "Corresponding behaviour of OneNAND in OTP"
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* flexonenand_oob_128 - oob info for Flex-Onenand with 4KB page
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* For now, we expose only 64 out of 80 ecc bytes
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*/
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static struct nand_ecclayout flexonenand_oob_128 = {
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.eccbytes = 64,
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.eccpos = {
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6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
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102, 103, 104, 105
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},
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.oobfree = {
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{2, 4}, {18, 4}, {34, 4}, {50, 4},
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{66, 4}, {82, 4}, {98, 4}, {114, 4}
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}
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static int flexonenand_ooblayout_ecc(struct mtd_info *mtd, int section,
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struct mtd_oob_region *oobregion)
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{
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if (section > 7)
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return -ERANGE;
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oobregion->offset = (section * 16) + 6;
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oobregion->length = 10;
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return 0;
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}
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static int flexonenand_ooblayout_free(struct mtd_info *mtd, int section,
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struct mtd_oob_region *oobregion)
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{
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if (section > 7)
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return -ERANGE;
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oobregion->offset = (section * 16) + 2;
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oobregion->length = 4;
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return 0;
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}
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static const struct mtd_ooblayout_ops flexonenand_ooblayout_ops = {
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.ecc = flexonenand_ooblayout_ecc,
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.free = flexonenand_ooblayout_free,
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};
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/*
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@ -91,56 +103,77 @@ static struct nand_ecclayout flexonenand_oob_128 = {
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* Based on specification:
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* 4Gb M-die OneNAND Flash (KFM4G16Q4M, KFN8G16Q4M). Rev. 1.3, Apr. 2010
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*
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* For eccpos we expose only 64 bytes out of 72 (see struct nand_ecclayout)
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*
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* oobfree uses the spare area fields marked as
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*/
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static int onenand_ooblayout_128_ecc(struct mtd_info *mtd, int section,
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struct mtd_oob_region *oobregion)
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{
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if (section > 7)
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return -ERANGE;
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oobregion->offset = (section * 16) + 7;
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oobregion->length = 9;
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return 0;
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}
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static int onenand_ooblayout_128_free(struct mtd_info *mtd, int section,
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struct mtd_oob_region *oobregion)
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{
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if (section >= 8)
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return -ERANGE;
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/*
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* free bytes are using the spare area fields marked as
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* "Managed by internal ECC logic for Logical Sector Number area"
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*/
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static struct nand_ecclayout onenand_oob_128 = {
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.eccbytes = 64,
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.eccpos = {
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7, 8, 9, 10, 11, 12, 13, 14, 15,
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23, 24, 25, 26, 27, 28, 29, 30, 31,
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39, 40, 41, 42, 43, 44, 45, 46, 47,
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55, 56, 57, 58, 59, 60, 61, 62, 63,
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71, 72, 73, 74, 75, 76, 77, 78, 79,
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87, 88, 89, 90, 91, 92, 93, 94, 95,
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103, 104, 105, 106, 107, 108, 109, 110, 111,
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119
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},
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.oobfree = {
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{2, 3}, {18, 3}, {34, 3}, {50, 3},
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{66, 3}, {82, 3}, {98, 3}, {114, 3}
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}
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oobregion->offset = (section * 16) + 2;
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oobregion->length = 3;
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return 0;
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}
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static const struct mtd_ooblayout_ops onenand_oob_128_ooblayout_ops = {
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.ecc = onenand_ooblayout_128_ecc,
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.free = onenand_ooblayout_128_free,
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};
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/**
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* onenand_oob_64 - oob info for large (2KB) page
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* onenand_oob_32_64 - oob info for large (2KB) page
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*/
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static struct nand_ecclayout onenand_oob_64 = {
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.eccbytes = 20,
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.eccpos = {
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8, 9, 10, 11, 12,
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24, 25, 26, 27, 28,
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40, 41, 42, 43, 44,
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56, 57, 58, 59, 60,
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},
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.oobfree = {
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{2, 3}, {14, 2}, {18, 3}, {30, 2},
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{34, 3}, {46, 2}, {50, 3}, {62, 2}
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}
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};
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static int onenand_ooblayout_32_64_ecc(struct mtd_info *mtd, int section,
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struct mtd_oob_region *oobregion)
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{
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if (section > 3)
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return -ERANGE;
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/**
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* onenand_oob_32 - oob info for middle (1KB) page
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*/
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static struct nand_ecclayout onenand_oob_32 = {
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.eccbytes = 10,
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.eccpos = {
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8, 9, 10, 11, 12,
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24, 25, 26, 27, 28,
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},
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.oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
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oobregion->offset = (section * 16) + 8;
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oobregion->length = 5;
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return 0;
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}
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static int onenand_ooblayout_32_64_free(struct mtd_info *mtd, int section,
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struct mtd_oob_region *oobregion)
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{
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int sections = (mtd->oobsize / 32) * 2;
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if (section >= sections)
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return -ERANGE;
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if (section & 1) {
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oobregion->offset = ((section - 1) * 16) + 14;
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oobregion->length = 2;
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} else {
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oobregion->offset = (section * 16) + 2;
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oobregion->length = 3;
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}
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return 0;
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}
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static const struct mtd_ooblayout_ops onenand_oob_32_64_ooblayout_ops = {
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.ecc = onenand_ooblayout_32_64_ecc,
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.free = onenand_ooblayout_32_64_free,
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};
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static const unsigned char ffchars[] = {
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@ -3957,22 +3990,22 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
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switch (mtd->oobsize) {
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case 128:
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if (FLEXONENAND(this)) {
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this->ecclayout = &flexonenand_oob_128;
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mtd_set_ooblayout(mtd, &flexonenand_ooblayout_ops);
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mtd->subpage_sft = 0;
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} else {
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this->ecclayout = &onenand_oob_128;
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mtd_set_ooblayout(mtd, &onenand_oob_128_ooblayout_ops);
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mtd->subpage_sft = 2;
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}
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if (ONENAND_IS_NOP_1(this))
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mtd->subpage_sft = 0;
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break;
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case 64:
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this->ecclayout = &onenand_oob_64;
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mtd_set_ooblayout(mtd, &onenand_oob_32_64_ooblayout_ops);
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mtd->subpage_sft = 2;
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break;
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case 32:
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this->ecclayout = &onenand_oob_32;
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mtd_set_ooblayout(mtd, &onenand_oob_32_64_ooblayout_ops);
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mtd->subpage_sft = 1;
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break;
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@ -3981,7 +4014,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
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__func__, mtd->oobsize);
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mtd->subpage_sft = 0;
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/* To prevent kernel oops */
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this->ecclayout = &onenand_oob_32;
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mtd_set_ooblayout(mtd, &onenand_oob_32_64_ooblayout_ops);
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break;
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}
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@ -3997,7 +4030,6 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
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mtd->oobavail = ret;
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mtd_set_ecclayout(mtd, this->ecclayout);
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mtd->ecc_strength = 1;
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/* Fill in remaining MTD driver data */
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@ -80,7 +80,6 @@ struct onenand_bufferram {
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* @page_buf: [INTERN] page main data buffer
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* @oob_buf: [INTERN] page oob data buffer
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* @subpagesize: [INTERN] holds the subpagesize
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* @ecclayout: [REPLACEABLE] the default ecc placement scheme
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* @bbm: [REPLACEABLE] pointer to Bad Block Management
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* @priv: [OPTIONAL] pointer to private chip date
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*/
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@ -134,7 +133,6 @@ struct onenand_chip {
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#endif
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int subpagesize;
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struct nand_ecclayout *ecclayout;
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void *bbm;
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