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mtd: nand: force drivers to explicitly send READ/PROG commands 

The core currently send the READ0 and SEQIN+PAGEPROG commands in
nand_do_read/write_ops(). This is inconsistent with
->read/write_oob[_raw]() hooks behavior which are expected to send
these commands.

There's already a flag (NAND_ECC_CUSTOM_PAGE_ACCESS) to inform the core
that a specific controller wants to send the READ/SEQIN+PAGEPROG
commands on its own, but it's an opt-in flag, and existing drivers are
unlikely to be updated to pass it.

Moreover, some controllers cannot dissociate the READ/PAGEPROG commands
from the associated data transfer and ECC engine activation, and
developers have to hack things in their ->cmdfunc() implementation to
handle such complex cases, or have to accept the perf penalty of sending
twice the same command.
To address this problem we are planning on adding a new interface which
is passed all information about a NAND operation (including the amount
of data to transfer) and replacing all calls to ->cmdfunc() to calls to
this new ->exec_op() hook. But, in order to do that, we need to have all
->cmdfunc() calls placed near their associated ->read/write_buf/byte()
calls.

Modify the core and relevant drivers to make NAND_ECC_CUSTOM_PAGE_ACCESS
the default case, and remove this flag.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[miquel.raynal@free-electrons.com: tested, fixed and rebased on nand/next]
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Boris Brezillon 2017-11-30 18:01:30 +01:00
parent 97d90da8a8
commit 25f815f66a
24 changed files with 171 additions and 198 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/mtd/nand/atmel/nand-controller.c
View File

@ -841,6 +841,8 @@ static int atmel_nand_pmecc_write_pg(struct nand_chip *chip, const u8 *buf,
struct atmel_nand *nand = to_atmel_nand(chip);
int ret;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
ret = atmel_nand_pmecc_enable(chip, NAND_ECC_WRITE, raw);
if (ret)
return ret;
@ -857,7 +859,7 @@ static int atmel_nand_pmecc_write_pg(struct nand_chip *chip, const u8 *buf,
atmel_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static int atmel_nand_pmecc_write_page(struct mtd_info *mtd,
@ -881,6 +883,8 @@ static int atmel_nand_pmecc_read_pg(struct nand_chip *chip, u8 *buf,
struct mtd_info *mtd = nand_to_mtd(chip);
int ret;
nand_read_page_op(chip, page, 0, NULL, 0);
ret = atmel_nand_pmecc_enable(chip, NAND_ECC_READ, raw);
if (ret)
return ret;
@ -1178,7 +1182,6 @@ static int atmel_hsmc_nand_ecc_init(struct atmel_nand *nand)
chip->ecc.write_page = atmel_hsmc_nand_pmecc_write_page;
chip->ecc.read_page_raw = atmel_hsmc_nand_pmecc_read_page_raw;
chip->ecc.write_page_raw = atmel_hsmc_nand_pmecc_write_page_raw;
chip->ecc.options |= NAND_ECC_CUSTOM_PAGE_ACCESS;
return 0;
}

6
drivers/mtd/nand/bf5xx_nand.c
View File

@ -572,6 +572,8 @@ static void bf5xx_nand_dma_write_buf(struct mtd_info *mtd,
static int bf5xx_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *buf, int oob_required, int page)
{
nand_read_page_op(chip, page, 0, NULL, 0);
bf5xx_nand_read_buf(mtd, buf, mtd->writesize);
bf5xx_nand_read_buf(mtd, chip->oob_poi, mtd->oobsize);
@ -582,10 +584,10 @@ static int bf5xx_nand_write_page_raw(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf, int oob_required,
int page)
{
bf5xx_nand_write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
bf5xx_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
/*

13
drivers/mtd/nand/brcmnand/brcmnand.c
View File

@ -1689,7 +1689,6 @@ static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd,
sas = mtd->oobsize / chip->ecc.steps;
/* read without ecc for verification */
nand_read_page_op(chip, page, 0, NULL, 0);
ret = chip->ecc.read_page_raw(mtd, chip, buf, true, page);
if (ret)
return ret;
@ -1793,6 +1792,8 @@ static int brcmnand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
struct brcmnand_host *host = nand_get_controller_data(chip);
u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL;
nand_read_page_op(chip, page, 0, NULL, 0);
return brcmnand_read(mtd, chip, host->last_addr,
mtd->writesize >> FC_SHIFT, (u32 *)buf, oob);
}
@ -1804,6 +1805,8 @@ static int brcmnand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL;
int ret;
nand_read_page_op(chip, page, 0, NULL, 0);
brcmnand_set_ecc_enabled(host, 0);
ret = brcmnand_read(mtd, chip, host->last_addr,
mtd->writesize >> FC_SHIFT, (u32 *)buf, oob);
@ -1909,8 +1912,10 @@ static int brcmnand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
struct brcmnand_host *host = nand_get_controller_data(chip);
void *oob = oob_required ? chip->oob_poi : NULL;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob);
return 0;
return nand_prog_page_end_op(chip);
}
static int brcmnand_write_page_raw(struct mtd_info *mtd,
@ -1920,10 +1925,12 @@ static int brcmnand_write_page_raw(struct mtd_info *mtd,
struct brcmnand_host *host = nand_get_controller_data(chip);
void *oob = oob_required ? chip->oob_poi : NULL;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
brcmnand_set_ecc_enabled(host, 0);
brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob);
brcmnand_set_ecc_enabled(host, 1);
return 0;
return nand_prog_page_end_op(chip);
}
static int brcmnand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,

6
drivers/mtd/nand/cafe_nand.c
View File

@ -383,7 +383,7 @@ static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
cafe_readl(cafe, NAND_ECC_RESULT),
cafe_readl(cafe, NAND_ECC_SYN01));
chip->read_buf(mtd, buf, mtd->writesize);
nand_read_page_op(chip, page, 0, buf, mtd->writesize);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
if (checkecc && cafe_readl(cafe, NAND_ECC_RESULT) & (1<<18)) {
@ -541,13 +541,13 @@ static int cafe_nand_write_page_lowlevel(struct mtd_info *mtd,
{
struct cafe_priv *cafe = nand_get_controller_data(chip);
chip->write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
/* Set up ECC autogeneration */
cafe->ctl2 |= (1<<30);
return 0;
return nand_prog_page_end_op(chip);
}
static int cafe_nand_block_bad(struct mtd_info *mtd, loff_t ofs)

1
drivers/mtd/nand/denali.c
View File

@ -1358,7 +1358,6 @@ int denali_init(struct denali_nand_info *denali)
chip->read_buf = denali_read_buf;
chip->write_buf = denali_write_buf;
}
chip->ecc.options |= NAND_ECC_CUSTOM_PAGE_ACCESS;
chip->ecc.read_page = denali_read_page;
chip->ecc.read_page_raw = denali_read_page_raw;
chip->ecc.write_page = denali_write_page;

12
drivers/mtd/nand/docg4.c
View File

@ -785,6 +785,8 @@ static int read_page(struct mtd_info *mtd, struct nand_chip *nand,
dev_dbg(doc->dev, "%s: page %08x\n", __func__, page);
nand_read_page_op(nand, page, 0, NULL, 0);
writew(DOC_ECCCONF0_READ_MODE |
DOC_ECCCONF0_ECC_ENABLE |
DOC_ECCCONF0_UNKNOWN |
@ -948,7 +950,7 @@ static int docg4_erase_block(struct mtd_info *mtd, int page)
}
static int write_page(struct mtd_info *mtd, struct nand_chip *nand,
const uint8_t *buf, bool use_ecc)
const uint8_t *buf, int page, bool use_ecc)
{
struct docg4_priv *doc = nand_get_controller_data(nand);
void __iomem *docptr = doc->virtadr;
@ -956,6 +958,8 @@ static int write_page(struct mtd_info *mtd, struct nand_chip *nand,
dev_dbg(doc->dev, "%s...\n", __func__);
nand_prog_page_begin_op(nand, page, 0, NULL, 0);
writew(DOC_ECCCONF0_ECC_ENABLE |
DOC_ECCCONF0_UNKNOWN |
DOCG4_BCH_SIZE,
@ -1000,19 +1004,19 @@ static int write_page(struct mtd_info *mtd, struct nand_chip *nand,
writew(0, docptr + DOC_DATAEND);
write_nop(docptr);
return 0;
return nand_prog_page_end_op(nand);
}
static int docg4_write_page_raw(struct mtd_info *mtd, struct nand_chip *nand,
const uint8_t *buf, int oob_required, int page)
{
return write_page(mtd, nand, buf, false);
return write_page(mtd, nand, buf, page, false);
}
static int docg4_write_page(struct mtd_info *mtd, struct nand_chip *nand,
const uint8_t *buf, int oob_required, int page)
{
return write_page(mtd, nand, buf, true);
return write_page(mtd, nand, buf, page, true);
}
static int docg4_write_oob(struct mtd_info *mtd, struct nand_chip *nand,

10
drivers/mtd/nand/fsl_elbc_nand.c
View File

@ -713,7 +713,7 @@ static int fsl_elbc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
struct fsl_lbc_ctrl *ctrl = priv->ctrl;
struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = ctrl->nand;
fsl_elbc_read_buf(mtd, buf, mtd->writesize);
nand_read_page_op(chip, page, 0, buf, mtd->writesize);
if (oob_required)
fsl_elbc_read_buf(mtd, chip->oob_poi, mtd->oobsize);
@ -729,10 +729,10 @@ static int fsl_elbc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
static int fsl_elbc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required, int page)
{
fsl_elbc_write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
/* ECC will be calculated automatically, and errors will be detected in
@ -742,10 +742,10 @@ static int fsl_elbc_write_subpage(struct mtd_info *mtd, struct nand_chip *chip,
uint32_t offset, uint32_t data_len,
const uint8_t *buf, int oob_required, int page)
{
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
fsl_elbc_write_buf(mtd, buf, mtd->writesize);
fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)

6
drivers/mtd/nand/fsl_ifc_nand.c
View File

@ -688,7 +688,7 @@ static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_nand_ctrl *nctrl = ifc_nand_ctrl;
fsl_ifc_read_buf(mtd, buf, mtd->writesize);
nand_read_page_op(chip, page, 0, buf, mtd->writesize);
if (oob_required)
fsl_ifc_read_buf(mtd, chip->oob_poi, mtd->oobsize);
@ -711,10 +711,10 @@ static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
static int fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required, int page)
{
fsl_ifc_write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static int fsl_ifc_chip_init_tail(struct mtd_info *mtd)

31
drivers/mtd/nand/gpmi-nand/gpmi-nand.c
View File

@ -1043,6 +1043,8 @@ static int gpmi_ecc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
unsigned int max_bitflips = 0;
int ret;
nand_read_page_op(chip, page, 0, NULL, 0);
dev_dbg(this->dev, "page number is : %d\n", page);
ret = read_page_prepare(this, buf, nfc_geo->payload_size,
this->payload_virt, this->payload_phys,
@ -1220,12 +1222,12 @@ static int gpmi_ecc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
meta = geo->metadata_size;
if (first) {
col = meta + (size + ecc_parity_size) * first;
nand_change_read_column_op(chip, col, NULL, 0, false);
meta = 0;
buf = buf + first * size;
}
nand_read_page_op(chip, page, col, NULL, 0);
/* Save the old environment */
r1_old = r1_new = readl(bch_regs + HW_BCH_FLASH0LAYOUT0);
r2_old = r2_new = readl(bch_regs + HW_BCH_FLASH0LAYOUT1);
@ -1277,6 +1279,9 @@ static int gpmi_ecc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
int ret;
dev_dbg(this->dev, "ecc write page.\n");
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (this->swap_block_mark) {
/*
* If control arrives here, we're doing block mark swapping.
@ -1338,7 +1343,10 @@ exit_auxiliary:
payload_virt, payload_phys);
}
return 0;
if (ret)
return ret;
return nand_prog_page_end_op(chip);
}
/*
@ -1472,8 +1480,8 @@ static int gpmi_ecc_read_page_raw(struct mtd_info *mtd,
uint8_t *oob = chip->oob_poi;
int step;
chip->read_buf(mtd, tmp_buf,
mtd->writesize + mtd->oobsize);
nand_read_page_op(chip, page, 0, tmp_buf,
mtd->writesize + mtd->oobsize);
/*
* If required, swap the bad block marker and the data stored in the
@ -1609,24 +1617,19 @@ static int gpmi_ecc_write_page_raw(struct mtd_info *mtd,
if (this->swap_block_mark)
swap(tmp_buf[0], tmp_buf[mtd->writesize]);
chip->write_buf(mtd, tmp_buf, mtd->writesize + mtd->oobsize);
return 0;
return nand_prog_page_op(chip, page, 0, tmp_buf,
mtd->writesize + mtd->oobsize);
}
static int gpmi_ecc_read_oob_raw(struct mtd_info *mtd, struct nand_chip *chip,
int page)
{
nand_read_page_op(chip, page, 0, NULL, 0);
return gpmi_ecc_read_page_raw(mtd, chip, NULL, 1, page);
}
static int gpmi_ecc_write_oob_raw(struct mtd_info *mtd, struct nand_chip *chip,
int page)
{
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
return gpmi_ecc_write_page_raw(mtd, chip, NULL, 1, page);
}
@ -1798,9 +1801,7 @@ static int mx23_write_transcription_stamp(struct gpmi_nand_data *this)
/* Write the first page of the current stride. */
dev_dbg(dev, "Writing an NCB fingerprint in page 0x%x\n", page);
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
chip->ecc.write_page_raw(mtd, chip, buffer, 0, page);
status = nand_prog_page_end_op(chip);
status = chip->ecc.write_page_raw(mtd, chip, buffer, 0, page);
if (status)
dev_err(dev, "[%s] Write failed.\n", __func__);
}

6
drivers/mtd/nand/hisi504_nand.c
View File

@ -544,7 +544,7 @@ static int hisi_nand_read_page_hwecc(struct mtd_info *mtd,
int max_bitflips = 0, stat = 0, stat_max = 0, status_ecc;
int stat_1, stat_2;
chip->read_buf(mtd, buf, mtd->writesize);
nand_read_page_op(chip, page, 0, buf, mtd->writesize);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
/* errors which can not be corrected by ECC */
@ -589,11 +589,11 @@ static int hisi_nand_write_page_hwecc(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf, int oob_required,
int page)
{
chip->write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
if (oob_required)
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static void hisi_nfc_host_init(struct hinfc_host *host)

5
drivers/mtd/nand/lpc32xx_mlc.c
View File

@ -522,6 +522,8 @@ static int lpc32xx_write_page_lowlevel(struct mtd_info *mtd,
memcpy(dma_buf, buf, mtd->writesize);
}
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
for (i = 0; i < host->mlcsubpages; i++) {
/* Start Encode */
writeb(0x00, MLC_ECC_ENC_REG(host->io_base));
@ -550,7 +552,8 @@ static int lpc32xx_write_page_lowlevel(struct mtd_info *mtd,
/* Wait for Controller Ready */
lpc32xx_waitfunc_controller(mtd, chip);
}
return 0;
return nand_prog_page_end_op(chip);
}
static int lpc32xx_read_oob(struct mtd_info *mtd, struct nand_chip *chip,

11
drivers/mtd/nand/lpc32xx_slc.c
View File

@ -686,6 +686,8 @@ static int lpc32xx_nand_write_page_syndrome(struct mtd_info *mtd,
uint8_t *pb;
int error;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
/* Write data, calculate ECC on outbound data */
error = lpc32xx_xfer(mtd, (uint8_t *)buf, chip->ecc.steps, 0);
if (error)
@ -704,7 +706,8 @@ static int lpc32xx_nand_write_page_syndrome(struct mtd_info *mtd,
/* Write ECC data to device */
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
/*
@ -717,9 +720,11 @@ static int lpc32xx_nand_write_page_raw_syndrome(struct mtd_info *mtd,
int oob_required, int page)
{
/* Raw writes can just use the FIFO interface */
chip->write_buf(mtd, buf, chip->ecc.size * chip->ecc.steps);
nand_prog_page_begin_op(chip, page, 0, buf,
chip->ecc.size * chip->ecc.steps);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static int lpc32xx_nand_dma_setup(struct lpc32xx_nand_host *host)

22
drivers/mtd/nand/mtk_nand.c
View File

@ -761,6 +761,8 @@ static int mtk_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
u32 reg;
int ret;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (!raw) {
/* OOB => FDM: from register, ECC: from HW */
reg = nfi_readw(nfc, NFI_CNFG) | CNFG_AUTO_FMT_EN;
@ -794,7 +796,10 @@ static int mtk_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
if (!raw)
mtk_ecc_disable(nfc->ecc);
return ret;
if (ret)
return ret;
return nand_prog_page_end_op(chip);
}
static int mtk_nfc_write_page_hwecc(struct mtd_info *mtd,
@ -832,15 +837,7 @@ static int mtk_nfc_write_subpage_hwecc(struct mtd_info *mtd,
static int mtk_nfc_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
int page)
{
int ret;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
ret = mtk_nfc_write_page_raw(mtd, chip, NULL, 1, page);
if (ret < 0)
return -EIO;
return nand_prog_page_end_op(chip);
return mtk_nfc_write_page_raw(mtd, chip, NULL, 1, page);
}
static int mtk_nfc_update_ecc_stats(struct mtd_info *mtd, u8 *buf, u32 sectors)
@ -889,8 +886,7 @@ static int mtk_nfc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
len = sectors * chip->ecc.size + (raw ? sectors * spare : 0);
buf = bufpoi + start * chip->ecc.size;
if (column != 0)
nand_change_read_column_op(chip, column, NULL, 0, false);
nand_read_page_op(chip, page, column, NULL, 0);
addr = dma_map_single(nfc->dev, buf, len, DMA_FROM_DEVICE);
rc = dma_mapping_error(nfc->dev, addr);
@ -1013,8 +1009,6 @@ static int mtk_nfc_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
static int mtk_nfc_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
int page)
{
nand_read_page_op(chip, page, 0, NULL, 0);
return mtk_nfc_read_page_raw(mtd, chip, NULL, 1, page);
}

87
drivers/mtd/nand/nand_base.c
View File

@ -1940,7 +1940,7 @@ int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
{
int ret;
ret = nand_read_data_op(chip, buf, mtd->writesize, false);
ret = nand_read_page_op(chip, page, 0, buf, mtd->writesize);
if (ret)
return ret;
@ -1974,6 +1974,10 @@ static int nand_read_page_raw_syndrome(struct mtd_info *mtd,
uint8_t *oob = chip->oob_poi;
int steps, size, ret;
ret = nand_read_page_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (steps = chip->ecc.steps; steps > 0; steps--) {
ret = nand_read_data_op(chip, buf, eccsize, false);
if (ret)
@ -2096,11 +2100,8 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
data_col_addr = start_step * chip->ecc.size;
/* If we read not a page aligned data */
if (data_col_addr != 0)
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1);
p = bufpoi + data_col_addr;
ret = nand_read_data_op(chip, p, datafrag_len, false);
ret = nand_read_page_op(chip, page, data_col_addr, p, datafrag_len);
if (ret)
return ret;
@ -2198,6 +2199,10 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *ecc_code = chip->buffers->ecccode;
unsigned int max_bitflips = 0;
ret = nand_read_page_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
chip->ecc.hwctl(mtd, NAND_ECC_READ);
@ -2335,6 +2340,10 @@ static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *oob = chip->oob_poi;
unsigned int max_bitflips = 0;
ret = nand_read_page_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
int stat;
@ -2517,12 +2526,6 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
__func__, buf);
read_retry:
if (nand_standard_page_accessors(&chip->ecc)) {
ret = nand_read_page_op(chip, page, 0, NULL, 0);
if (ret)
break;
}
/*
* Now read the page into the buffer. Absent an error,
* the read methods return max bitflips per ecc step.
@ -2978,7 +2981,7 @@ int nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
{
int ret;
ret = nand_write_data_op(chip, buf, mtd->writesize, false);
ret = nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
if (ret)
return ret;
@ -2989,7 +2992,7 @@ int nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
return ret;
}
return 0;
return nand_prog_page_end_op(chip);
}
EXPORT_SYMBOL(nand_write_page_raw);
@ -3013,6 +3016,10 @@ static int nand_write_page_raw_syndrome(struct mtd_info *mtd,
uint8_t *oob = chip->oob_poi;
int steps, size, ret;
ret = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (steps = chip->ecc.steps; steps > 0; steps--) {
ret = nand_write_data_op(chip, buf, eccsize, false);
if (ret)
@ -3052,7 +3059,7 @@ static int nand_write_page_raw_syndrome(struct mtd_info *mtd,
return ret;
}
return 0;
return nand_prog_page_end_op(chip);
}
/**
* nand_write_page_swecc - [REPLACEABLE] software ECC based page write function
@ -3102,6 +3109,10 @@ static int nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *ecc_calc = chip->buffers->ecccalc;
const uint8_t *p = buf;
ret = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
@ -3121,7 +3132,7 @@ static int nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
if (ret)
return ret;
return 0;
return nand_prog_page_end_op(chip);
}
@ -3150,6 +3161,10 @@ static int nand_write_subpage_hwecc(struct mtd_info *mtd,
int oob_bytes = mtd->oobsize / ecc_steps;
int step, ret;
ret = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (step = 0; step < ecc_steps; step++) {
/* configure controller for WRITE access */
chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
@ -3188,7 +3203,7 @@ static int nand_write_subpage_hwecc(struct mtd_info *mtd,
if (ret)
return ret;
return 0;
return nand_prog_page_end_op(chip);
}
@ -3215,6 +3230,10 @@ static int nand_write_page_syndrome(struct mtd_info *mtd,
uint8_t *oob = chip->oob_poi;
int ret;
ret = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
@ -3257,7 +3276,7 @@ static int nand_write_page_syndrome(struct mtd_info *mtd,
return ret;
}
return 0;
return nand_prog_page_end_op(chip);
}
/**
@ -3283,12 +3302,6 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
else
subpage = 0;
if (nand_standard_page_accessors(&chip->ecc)) {
status = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (status)
return status;
}
if (unlikely(raw))
status = chip->ecc.write_page_raw(mtd, chip, buf,
oob_required, page);
@ -3302,9 +3315,6 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
if (status < 0)
return status;
if (nand_standard_page_accessors(&chip->ecc))
return nand_prog_page_end_op(chip);
return 0;
}
@ -5290,26 +5300,6 @@ static bool nand_ecc_strength_good(struct mtd_info *mtd)
return corr >= ds_corr && ecc->strength >= chip->ecc_strength_ds;
}
static bool invalid_ecc_page_accessors(struct nand_chip *chip)
{
struct nand_ecc_ctrl *ecc = &chip->ecc;
if (nand_standard_page_accessors(ecc))
return false;
/*
* NAND_ECC_CUSTOM_PAGE_ACCESS flag is set, make sure the NAND
* controller driver implements all the page accessors because
* default helpers are not suitable when the core does not
* send the READ0/PAGEPROG commands.
*/
return (!ecc->read_page || !ecc->write_page ||
!ecc->read_page_raw || !ecc->write_page_raw ||
(NAND_HAS_SUBPAGE_READ(chip) && !ecc->read_subpage) ||
(NAND_HAS_SUBPAGE_WRITE(chip) && !ecc->write_subpage &&
ecc->hwctl && ecc->calculate));
}
/**
* nand_scan_tail - [NAND Interface] Scan for the NAND device
* @mtd: MTD device structure
@ -5331,11 +5321,6 @@ int nand_scan_tail(struct mtd_info *mtd)
return -EINVAL;
}
if (invalid_ecc_page_accessors(chip)) {
pr_err("Invalid ECC page accessors setup\n");
return -EINVAL;
}
if (!(chip->options & NAND_OWN_BUFFERS)) {
nbuf = kzalloc(sizeof(*nbuf), GFP_KERNEL);
if (!nbuf)

56
drivers/mtd/nand/nand_micron.c
View File

@ -149,7 +149,10 @@ micron_nand_read_page_on_die_ecc(struct mtd_info *mtd, struct nand_chip *chip,
else if (status & NAND_STATUS_WRITE_RECOMMENDED)
max_bitflips = chip->ecc.strength;
ret = nand_read_page_raw(mtd, chip, buf, oob_required, page);
ret = nand_read_data_op(chip, buf, mtd->writesize, false);
if (!ret && oob_required)
ret = nand_read_data_op(chip, chip->oob_poi, mtd->oobsize,
false);
out:
micron_nand_on_die_ecc_setup(chip, false);
@ -168,56 +171,12 @@ micron_nand_write_page_on_die_ecc(struct mtd_info *mtd, struct nand_chip *chip,
if (ret)
return ret;
ret = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (ret)
goto out;
ret = nand_write_page_raw(mtd, chip, buf, oob_required, page);
if (ret)
return ret;
ret = nand_prog_page_end_op(chip);
out:
micron_nand_on_die_ecc_setup(chip, false);
return ret;
}
static int
micron_nand_read_page_raw_on_die_ecc(struct mtd_info *mtd,
struct nand_chip *chip,
uint8_t *buf, int oob_required,
int page)
{
int ret;
ret = nand_read_page_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
return nand_read_page_raw(mtd, chip, buf, oob_required, page);
}
static int
micron_nand_write_page_raw_on_die_ecc(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf, int oob_required,
int page)
{
int ret;
ret = nand_prog_page_begin_op(chip, page, 0, NULL, 0);
if (ret)
return ret;
ret = nand_write_page_raw(mtd, chip, buf, oob_required, page);
if (ret)
return ret;
return nand_prog_page_end_op(chip);
}
enum {
/* The NAND flash doesn't support on-die ECC */
MICRON_ON_DIE_UNSUPPORTED,
@ -310,17 +269,14 @@ static int micron_nand_init(struct nand_chip *chip)
return -EINVAL;
}
chip->ecc.options = NAND_ECC_CUSTOM_PAGE_ACCESS;
chip->ecc.bytes = 8;
chip->ecc.size = 512;
chip->ecc.strength = 4;
chip->ecc.algo = NAND_ECC_BCH;
chip->ecc.read_page = micron_nand_read_page_on_die_ecc;
chip->ecc.write_page = micron_nand_write_page_on_die_ecc;
chip->ecc.read_page_raw =
micron_nand_read_page_raw_on_die_ecc;
chip->ecc.write_page_raw =
micron_nand_write_page_raw_on_die_ecc;
chip->ecc.read_page_raw = nand_read_page_raw;
chip->ecc.write_page_raw = nand_write_page_raw;
mtd_set_ooblayout(mtd, &micron_nand_on_die_ooblayout_ops);
}

10
drivers/mtd/nand/omap2.c
View File

@ -1532,6 +1532,8 @@ static int omap_write_page_bch(struct mtd_info *mtd, struct nand_chip *chip,
int ret;
uint8_t *ecc_calc = chip->buffers->ecccalc;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
/* Enable GPMC ecc engine */
chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
@ -1548,7 +1550,8 @@ static int omap_write_page_bch(struct mtd_info *mtd, struct nand_chip *chip,
/* Write ecc vector to OOB area */
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
/**
@ -1582,6 +1585,7 @@ static int omap_write_subpage_bch(struct mtd_info *mtd,
* ECC is calculated for all subpages but we choose
* only what we want.
*/
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
/* Enable GPMC ECC engine */
chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
@ -1614,7 +1618,7 @@ static int omap_write_subpage_bch(struct mtd_info *mtd,
/* write OOB buffer to NAND device */
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
/**
@ -1640,6 +1644,8 @@ static int omap_read_page_bch(struct mtd_info *mtd, struct nand_chip *chip,
int stat, ret;
unsigned int max_bitflips = 0;
nand_read_page_op(chip, page, 0, NULL, 0);
/* Enable GPMC ecc engine */
chip->ecc.hwctl(mtd, NAND_ECC_READ);

6
drivers/mtd/nand/pxa3xx_nand.c
View File

@ -1348,10 +1348,10 @@ static int pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf, int oob_required,
int page)
{
chip->write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
@ -1361,7 +1361,7 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
struct pxa3xx_nand_info *info = host->info_data;
chip->read_buf(mtd, buf, mtd->writesize);
nand_read_page_op(chip, page, 0, buf, mtd->writesize);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
if (info->retcode == ERR_CORERR && info->use_ecc) {

11
drivers/mtd/nand/qcom_nandc.c
View File

@ -1725,6 +1725,7 @@ static int qcom_nandc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
u8 *data_buf, *oob_buf = NULL;
int ret;
nand_read_page_op(chip, page, 0, NULL, 0);
data_buf = buf;
oob_buf = oob_required ? chip->oob_poi : NULL;
@ -1750,6 +1751,7 @@ static int qcom_nandc_read_page_raw(struct mtd_info *mtd,
int i, ret;
int read_loc;
nand_read_page_op(chip, page, 0, NULL, 0);
data_buf = buf;
oob_buf = chip->oob_poi;
@ -1850,6 +1852,8 @@ static int qcom_nandc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
u8 *data_buf, *oob_buf;
int i, ret;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
clear_read_regs(nandc);
clear_bam_transaction(nandc);
@ -1902,6 +1906,9 @@ static int qcom_nandc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
free_descs(nandc);
if (!ret)
ret = nand_prog_page_end_op(chip);
return ret;
}
@ -1916,6 +1923,7 @@ static int qcom_nandc_write_page_raw(struct mtd_info *mtd,
u8 *data_buf, *oob_buf;
int i, ret;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
clear_read_regs(nandc);
clear_bam_transaction(nandc);
@ -1970,6 +1978,9 @@ static int qcom_nandc_write_page_raw(struct mtd_info *mtd,
free_descs(nandc);
if (!ret)
ret = nand_prog_page_end_op(chip);
return ret;
}

6
drivers/mtd/nand/sh_flctl.c
View File

@ -614,7 +614,7 @@ static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_va
static int flctl_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *buf, int oob_required, int page)
{
chip->read_buf(mtd, buf, mtd->writesize);
nand_read_page_op(chip, page, 0, buf, mtd->writesize);
if (oob_required)
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
@ -624,9 +624,9 @@ static int flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required,
int page)
{
chip->write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
return nand_prog_page_end_op(chip);
}
static void execmd_read_page_sector(struct mtd_info *mtd, int page_addr)

34
drivers/mtd/nand/sunxi_nand.c
View File

@ -1245,6 +1245,8 @@ static int sunxi_nfc_hw_ecc_read_page(struct mtd_info *mtd,
int ret, i, cur_off = 0;
bool raw_mode = false;
nand_read_page_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
@ -1278,14 +1280,14 @@ static int sunxi_nfc_hw_ecc_read_page_dma(struct mtd_info *mtd,
{
int ret;
nand_read_page_op(chip, page, 0, NULL, 0);
ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, oob_required, page,
chip->ecc.steps);
if (ret >= 0)
return ret;
/* Fallback to PIO mode */
nand_change_read_column_op(chip, 0, NULL, 0, false);
return sunxi_nfc_hw_ecc_read_page(mtd, chip, buf, oob_required, page);
}
@ -1298,6 +1300,8 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct mtd_info *mtd,
int ret, i, cur_off = 0;
unsigned int max_bitflips = 0;
nand_read_page_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
for (i = data_offs / ecc->size;
@ -1329,13 +1333,13 @@ static int sunxi_nfc_hw_ecc_read_subpage_dma(struct mtd_info *mtd,
int nchunks = DIV_ROUND_UP(data_offs + readlen, chip->ecc.size);
int ret;
nand_read_page_op(chip, page, 0, NULL, 0);
ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, false, page, nchunks);
if (ret >= 0)
return ret;
/* Fallback to PIO mode */
nand_change_read_column_op(chip, 0, NULL, 0, false);
return sunxi_nfc_hw_ecc_read_subpage(mtd, chip, data_offs, readlen,
buf, page);
}
@ -1348,6 +1352,8 @@ static int sunxi_nfc_hw_ecc_write_page(struct mtd_info *mtd,
struct nand_ecc_ctrl *ecc = &chip->ecc;
int ret, i, cur_off = 0;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
@ -1369,7 +1375,7 @@ static int sunxi_nfc_hw_ecc_write_page(struct mtd_info *mtd,
sunxi_nfc_hw_ecc_disable(mtd);
return 0;
return nand_prog_page_end_op(chip);
}
static int sunxi_nfc_hw_ecc_write_subpage(struct mtd_info *mtd,
@ -1381,6 +1387,8 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct mtd_info *mtd,
struct nand_ecc_ctrl *ecc = &chip->ecc;
int ret, i, cur_off = 0;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
for (i = data_offs / ecc->size;
@ -1399,7 +1407,7 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct mtd_info *mtd,
sunxi_nfc_hw_ecc_disable(mtd);
return 0;
return nand_prog_page_end_op(chip);
}
static int sunxi_nfc_hw_ecc_write_page_dma(struct mtd_info *mtd,
@ -1429,6 +1437,8 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct mtd_info *mtd,
sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, i, !i, page);
}
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
sunxi_nfc_randomizer_config(mtd, page, false);
sunxi_nfc_randomizer_enable(mtd);
@ -1459,7 +1469,7 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct mtd_info *mtd,
sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi,
NULL, page);
return 0;
return nand_prog_page_end_op(chip);
pio_fallback:
return sunxi_nfc_hw_ecc_write_page(mtd, chip, buf, oob_required, page);
@ -1475,6 +1485,8 @@ static int sunxi_nfc_hw_syndrome_ecc_read_page(struct mtd_info *mtd,
int ret, i, cur_off = 0;
bool raw_mode = false;
nand_read_page_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
@ -1511,6 +1523,8 @@ static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd,
struct nand_ecc_ctrl *ecc = &chip->ecc;
int ret, i, cur_off = 0;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
@ -1532,15 +1546,13 @@ static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd,
sunxi_nfc_hw_ecc_disable(mtd);
return 0;
return nand_prog_page_end_op(chip);
}
static int sunxi_nfc_hw_common_ecc_read_oob(struct mtd_info *mtd,
struct nand_chip *chip,
int page)
{
nand_read_page_op(chip, page, 0, NULL, 0);
chip->pagebuf = -1;
return chip->ecc.read_page(mtd, chip, chip->buffers->databuf, 1, page);
@ -1552,8 +1564,6 @@ static int sunxi_nfc_hw_common_ecc_write_oob(struct mtd_info *mtd,
{
int ret;
nand_prog_page_begin_op(chip, page, 0, NULL, 0);
chip->pagebuf = -1;
memset(chip->buffers->databuf, 0xff, mtd->writesize);

1
drivers/mtd/nand/tango_nand.c
View File

@ -580,7 +580,6 @@ static int chip_init(struct device *dev, struct device_node *np)
ecc->write_page = tango_write_page;
ecc->read_oob = tango_read_oob;
ecc->write_oob = tango_write_oob;
ecc->options = NAND_ECC_CUSTOM_PAGE_ACCESS;
err = nand_scan_tail(mtd);
if (err)

6
drivers/mtd/nand/vf610_nfc.c
View File

@ -560,7 +560,7 @@ static int vf610_nfc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
int eccsize = chip->ecc.size;
int stat;
vf610_nfc_read_buf(mtd, buf, eccsize);
nand_read_page_op(chip, page, 0, buf, eccsize);
if (oob_required)
vf610_nfc_read_buf(mtd, chip->oob_poi, mtd->oobsize);
@ -580,7 +580,7 @@ static int vf610_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
{
struct vf610_nfc *nfc = mtd_to_nfc(mtd);
vf610_nfc_write_buf(mtd, buf, mtd->writesize);
nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
if (oob_required)
vf610_nfc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
@ -588,7 +588,7 @@ static int vf610_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
nfc->use_hw_ecc = true;
nfc->write_sz = mtd->writesize + mtd->oobsize;
return 0;
return nand_prog_page_end_op(chip);
}
static const struct of_device_id vf610_nfc_dt_ids[] = {

5
drivers/staging/mt29f_spinand/mt29f_spinand.c
View File

@ -637,8 +637,7 @@ static int spinand_write_page_hwecc(struct mtd_info *mtd,
int eccsteps = chip->ecc.steps;
enable_hw_ecc = 1;
chip->write_buf(mtd, p, eccsize * eccsteps);
return 0;
return nand_prog_page_op(chip, page, 0, p, eccsize * eccsteps);
}
static int spinand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
@ -653,7 +652,7 @@ static int spinand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
enable_read_hw_ecc = 1;
chip->read_buf(mtd, p, eccsize * eccsteps);
nand_read_page_op(chip, page, 0, p, eccsize * eccsteps);
if (oob_required)
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);

11
include/linux/mtd/rawnand.h
View File

@ -133,12 +133,6 @@ enum nand_ecc_algo {
*/
#define NAND_ECC_GENERIC_ERASED_CHECK BIT(0)
#define NAND_ECC_MAXIMIZE BIT(1)
/*
* If your controller already sends the required NAND commands when
* reading or writing a page, then the framework is not supposed to
* send READ0 and SEQIN/PAGEPROG respectively.
*/
#define NAND_ECC_CUSTOM_PAGE_ACCESS BIT(2)
/* Bit mask for flags passed to do_nand_read_ecc */
#define NAND_GET_DEVICE 0x80
@ -602,11 +596,6 @@ struct nand_ecc_ctrl {
int page);
};
static inline int nand_standard_page_accessors(struct nand_ecc_ctrl *ecc)
{
return !(ecc->options & NAND_ECC_CUSTOM_PAGE_ACCESS);
}
/**
* struct nand_buffers - buffer structure for read/write
* @ecccalc: buffer pointer for calculated ECC, size is oobsize.