mirror of https://gitee.com/openkylin/linux.git
mtd: nand: brcm: 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
parent
c8766e81ca
commit
ef5eeea6e9
|
|
@ -780,55 +780,161 @@ static inline bool is_hamming_ecc(struct brcmnand_cfg *cfg)
|
|||
}
|
||||
|
||||
/*
|
||||
* Returns a nand_ecclayout strucutre for the given layout/configuration.
|
||||
* Returns NULL on failure.
|
||||
* Set mtd->ooblayout to the appropriate mtd_ooblayout_ops given
|
||||
* the layout/configuration.
|
||||
* Returns -ERRCODE on failure.
|
||||
*/
|
||||
static struct nand_ecclayout *brcmnand_create_layout(int ecc_level,
|
||||
struct brcmnand_host *host)
|
||||
static int brcmnand_hamming_ooblayout_ecc(struct mtd_info *mtd, int section,
|
||||
struct mtd_oob_region *oobregion)
|
||||
{
|
||||
struct nand_chip *chip = mtd_to_nand(mtd);
|
||||
struct brcmnand_host *host = nand_get_controller_data(chip);
|
||||
struct brcmnand_cfg *cfg = &host->hwcfg;
|
||||
int i, j;
|
||||
struct nand_ecclayout *layout;
|
||||
int req;
|
||||
int sectors;
|
||||
int sas;
|
||||
int idx1, idx2;
|
||||
int sas = cfg->spare_area_size << cfg->sector_size_1k;
|
||||
int sectors = cfg->page_size / (512 << cfg->sector_size_1k);
|
||||
|
||||
layout = devm_kzalloc(&host->pdev->dev, sizeof(*layout), GFP_KERNEL);
|
||||
if (!layout)
|
||||
return NULL;
|
||||
if (section >= sectors)
|
||||
return -ERANGE;
|
||||
|
||||
sectors = cfg->page_size / (512 << cfg->sector_size_1k);
|
||||
sas = cfg->spare_area_size << cfg->sector_size_1k;
|
||||
oobregion->offset = (section * sas) + 6;
|
||||
oobregion->length = 3;
|
||||
|
||||
/* Hamming */
|
||||
if (is_hamming_ecc(cfg)) {
|
||||
for (i = 0, idx1 = 0, idx2 = 0; i < sectors; i++) {
|
||||
/* First sector of each page may have BBI */
|
||||
if (i == 0) {
|
||||
layout->oobfree[idx2].offset = i * sas + 1;
|
||||
/* Small-page NAND use byte 6 for BBI */
|
||||
if (cfg->page_size == 512)
|
||||
layout->oobfree[idx2].offset--;
|
||||
layout->oobfree[idx2].length = 5;
|
||||
} else {
|
||||
layout->oobfree[idx2].offset = i * sas;
|
||||
layout->oobfree[idx2].length = 6;
|
||||
}
|
||||
idx2++;
|
||||
layout->eccpos[idx1++] = i * sas + 6;
|
||||
layout->eccpos[idx1++] = i * sas + 7;
|
||||
layout->eccpos[idx1++] = i * sas + 8;
|
||||
layout->oobfree[idx2].offset = i * sas + 9;
|
||||
layout->oobfree[idx2].length = 7;
|
||||
idx2++;
|
||||
/* Leave zero-terminated entry for OOBFREE */
|
||||
if (idx1 >= MTD_MAX_ECCPOS_ENTRIES_LARGE ||
|
||||
idx2 >= MTD_MAX_OOBFREE_ENTRIES_LARGE - 1)
|
||||
break;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int brcmnand_hamming_ooblayout_free(struct mtd_info *mtd, int section,
|
||||
struct mtd_oob_region *oobregion)
|
||||
{
|
||||
struct nand_chip *chip = mtd_to_nand(mtd);
|
||||
struct brcmnand_host *host = nand_get_controller_data(chip);
|
||||
struct brcmnand_cfg *cfg = &host->hwcfg;
|
||||
int sas = cfg->spare_area_size << cfg->sector_size_1k;
|
||||
int sectors = cfg->page_size / (512 << cfg->sector_size_1k);
|
||||
|
||||
if (section >= sectors * 2)
|
||||
return -ERANGE;
|
||||
|
||||
oobregion->offset = (section / 2) * sas;
|
||||
|
||||
if (section & 1) {
|
||||
oobregion->offset += 9;
|
||||
oobregion->length = 7;
|
||||
} else {
|
||||
oobregion->length = 6;
|
||||
|
||||
/* First sector of each page may have BBI */
|
||||
if (!section) {
|
||||
/*
|
||||
* Small-page NAND use byte 6 for BBI while large-page
|
||||
* NAND use byte 0.
|
||||
*/
|
||||
if (cfg->page_size > 512)
|
||||
oobregion->offset++;
|
||||
oobregion->length--;
|
||||
}
|
||||
}
|
||||
|
||||
return layout;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct mtd_ooblayout_ops brcmnand_hamming_ooblayout_ops = {
|
||||
.ecc = brcmnand_hamming_ooblayout_ecc,
|
||||
.free = brcmnand_hamming_ooblayout_free,
|
||||
};
|
||||
|
||||
static int brcmnand_bch_ooblayout_ecc(struct mtd_info *mtd, int section,
|
||||
struct mtd_oob_region *oobregion)
|
||||
{
|
||||
struct nand_chip *chip = mtd_to_nand(mtd);
|
||||
struct brcmnand_host *host = nand_get_controller_data(chip);
|
||||
struct brcmnand_cfg *cfg = &host->hwcfg;
|
||||
int sas = cfg->spare_area_size << cfg->sector_size_1k;
|
||||
int sectors = cfg->page_size / (512 << cfg->sector_size_1k);
|
||||
|
||||
if (section >= sectors)
|
||||
return -ERANGE;
|
||||
|
||||
oobregion->offset = (section * (sas + 1)) - chip->ecc.bytes;
|
||||
oobregion->length = chip->ecc.bytes;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int brcmnand_bch_ooblayout_free_lp(struct mtd_info *mtd, int section,
|
||||
struct mtd_oob_region *oobregion)
|
||||
{
|
||||
struct nand_chip *chip = mtd_to_nand(mtd);
|
||||
struct brcmnand_host *host = nand_get_controller_data(chip);
|
||||
struct brcmnand_cfg *cfg = &host->hwcfg;
|
||||
int sas = cfg->spare_area_size << cfg->sector_size_1k;
|
||||
int sectors = cfg->page_size / (512 << cfg->sector_size_1k);
|
||||
|
||||
if (section >= sectors)
|
||||
return -ERANGE;
|
||||
|
||||
if (sas <= chip->ecc.bytes)
|
||||
return 0;
|
||||
|
||||
oobregion->offset = section * sas;
|
||||
oobregion->length = sas - chip->ecc.bytes;
|
||||
|
||||
if (!section) {
|
||||
oobregion->offset++;
|
||||
oobregion->length--;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int brcmnand_bch_ooblayout_free_sp(struct mtd_info *mtd, int section,
|
||||
struct mtd_oob_region *oobregion)
|
||||
{
|
||||
struct nand_chip *chip = mtd_to_nand(mtd);
|
||||
struct brcmnand_host *host = nand_get_controller_data(chip);
|
||||
struct brcmnand_cfg *cfg = &host->hwcfg;
|
||||
int sas = cfg->spare_area_size << cfg->sector_size_1k;
|
||||
|
||||
if (section > 1 || sas - chip->ecc.bytes < 6 ||
|
||||
(section && sas - chip->ecc.bytes == 6))
|
||||
return -ERANGE;
|
||||
|
||||
if (!section) {
|
||||
oobregion->offset = 0;
|
||||
oobregion->length = 5;
|
||||
} else {
|
||||
oobregion->offset = 6;
|
||||
oobregion->length = sas - chip->ecc.bytes - 6;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct mtd_ooblayout_ops brcmnand_bch_lp_ooblayout_ops = {
|
||||
.ecc = brcmnand_bch_ooblayout_ecc,
|
||||
.free = brcmnand_bch_ooblayout_free_lp,
|
||||
};
|
||||
|
||||
static const struct mtd_ooblayout_ops brcmnand_bch_sp_ooblayout_ops = {
|
||||
.ecc = brcmnand_bch_ooblayout_ecc,
|
||||
.free = brcmnand_bch_ooblayout_free_sp,
|
||||
};
|
||||
|
||||
static int brcmstb_choose_ecc_layout(struct brcmnand_host *host)
|
||||
{
|
||||
struct brcmnand_cfg *p = &host->hwcfg;
|
||||
struct mtd_info *mtd = nand_to_mtd(&host->chip);
|
||||
struct nand_ecc_ctrl *ecc = &host->chip.ecc;
|
||||
unsigned int ecc_level = p->ecc_level;
|
||||
int sas = p->spare_area_size << p->sector_size_1k;
|
||||
int sectors = p->page_size / (512 << p->sector_size_1k);
|
||||
|
||||
if (p->sector_size_1k)
|
||||
ecc_level <<= 1;
|
||||
|
||||
if (is_hamming_ecc(p)) {
|
||||
ecc->bytes = 3 * sectors;
|
||||
mtd_set_ooblayout(mtd, &brcmnand_hamming_ooblayout_ops);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -837,70 +943,20 @@ static struct nand_ecclayout *brcmnand_create_layout(int ecc_level,
|
|||
* >= v5.0: ECC_REQ = ceil(BCH_T * 14/8)
|
||||
* But we will just be conservative.
|
||||
*/
|
||||
req = DIV_ROUND_UP(ecc_level * 14, 8);
|
||||
if (req >= sas) {
|
||||
ecc->bytes = DIV_ROUND_UP(ecc_level * 14, 8);
|
||||
if (p->page_size == 512)
|
||||
mtd_set_ooblayout(mtd, &brcmnand_bch_sp_ooblayout_ops);
|
||||
else
|
||||
mtd_set_ooblayout(mtd, &brcmnand_bch_lp_ooblayout_ops);
|
||||
|
||||
if (ecc->bytes >= sas) {
|
||||
dev_err(&host->pdev->dev,
|
||||
"error: ECC too large for OOB (ECC bytes %d, spare sector %d)\n",
|
||||
req, sas);
|
||||
return NULL;
|
||||
ecc->bytes, sas);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
layout->eccbytes = req * sectors;
|
||||
for (i = 0, idx1 = 0, idx2 = 0; i < sectors; i++) {
|
||||
for (j = sas - req; j < sas && idx1 <
|
||||
MTD_MAX_ECCPOS_ENTRIES_LARGE; j++, idx1++)
|
||||
layout->eccpos[idx1] = i * sas + j;
|
||||
|
||||
/* First sector of each page may have BBI */
|
||||
if (i == 0) {
|
||||
if (cfg->page_size == 512 && (sas - req >= 6)) {
|
||||
/* Small-page NAND use byte 6 for BBI */
|
||||
layout->oobfree[idx2].offset = 0;
|
||||
layout->oobfree[idx2].length = 5;
|
||||
idx2++;
|
||||
if (sas - req > 6) {
|
||||
layout->oobfree[idx2].offset = 6;
|
||||
layout->oobfree[idx2].length =
|
||||
sas - req - 6;
|
||||
idx2++;
|
||||
}
|
||||
} else if (sas > req + 1) {
|
||||
layout->oobfree[idx2].offset = i * sas + 1;
|
||||
layout->oobfree[idx2].length = sas - req - 1;
|
||||
idx2++;
|
||||
}
|
||||
} else if (sas > req) {
|
||||
layout->oobfree[idx2].offset = i * sas;
|
||||
layout->oobfree[idx2].length = sas - req;
|
||||
idx2++;
|
||||
}
|
||||
/* Leave zero-terminated entry for OOBFREE */
|
||||
if (idx1 >= MTD_MAX_ECCPOS_ENTRIES_LARGE ||
|
||||
idx2 >= MTD_MAX_OOBFREE_ENTRIES_LARGE - 1)
|
||||
break;
|
||||
}
|
||||
|
||||
return layout;
|
||||
}
|
||||
|
||||
static struct nand_ecclayout *brcmstb_choose_ecc_layout(
|
||||
struct brcmnand_host *host)
|
||||
{
|
||||
struct nand_ecclayout *layout;
|
||||
struct brcmnand_cfg *p = &host->hwcfg;
|
||||
unsigned int ecc_level = p->ecc_level;
|
||||
|
||||
if (p->sector_size_1k)
|
||||
ecc_level <<= 1;
|
||||
|
||||
layout = brcmnand_create_layout(ecc_level, host);
|
||||
if (!layout) {
|
||||
dev_err(&host->pdev->dev,
|
||||
"no proper ecc_layout for this NAND cfg\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return layout;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void brcmnand_wp(struct mtd_info *mtd, int wp)
|
||||
|
|
@ -2010,9 +2066,9 @@ static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn)
|
|||
/* only use our internal HW threshold */
|
||||
mtd->bitflip_threshold = 1;
|
||||
|
||||
chip->ecc.layout = brcmstb_choose_ecc_layout(host);
|
||||
if (!chip->ecc.layout)
|
||||
return -ENXIO;
|
||||
ret = brcmstb_choose_ecc_layout(host);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (nand_scan_tail(mtd))
|
||||
return -ENXIO;
|
||||
|
|
|
|||
Loading…
Reference in New Issue