From: Boris BREZILLON Date: Tue, 13 Oct 2015 09:22:18 +0000 (+0200) Subject: mtd: nand: pass page number to ecc->write_xxx() methods X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=45aaeff947190e4b57b2d0db4d74ab5eea450825;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git mtd: nand: pass page number to ecc->write_xxx() methods The ->read_xxx() methods are all passed the page number the NAND controller is supposed to read, but ->write_xxx() do not have such a parameter. This is a problem if we want to properly implement data scrambling/randomization in order to mitigate MLC sensibility to repeated pattern: to prevent bitflips in adjacent pages in the same block we need to avoid repeating the same pattern at the same offset in those pages, hence the randomizer/scrambler engine need to be passed the page value in order to adapt its seed accordingly. Moreover, adding the page parameter to the ->write_xxx() methods add some consistency to the current API. Signed-off-by: Boris Brezillon CC: Josh Wu CC: Ezequiel Garcia CC: Maxime Ripard CC: Greg Kroah-Hartman CC: Huang Shijie CC: Stefan Agner CC: devel@driverdev.osuosl.org CC: linux-arm-kernel@lists.infradead.org CC: linux-kernel@vger.kernel.org Signed-off-by: Brian Norris --- diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 898947378713..583cdd9bb971 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -954,7 +954,8 @@ static int atmel_nand_pmecc_read_page(struct mtd_info *mtd, } static int atmel_nand_pmecc_write_page(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf, int oob_required) + struct nand_chip *chip, const uint8_t *buf, int oob_required, + int page) { struct atmel_nand_host *host = chip->priv; uint32_t *eccpos = chip->ecc.layout->eccpos; @@ -2005,7 +2006,8 @@ static int nfc_sram_write_page(struct mtd_info *mtd, struct nand_chip *chip, if (likely(!raw)) /* Need to write ecc into oob */ - status = chip->ecc.write_page(mtd, chip, buf, oob_required); + status = chip->ecc.write_page(mtd, chip, buf, oob_required, + page); if (status < 0) return status; diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c index acec34403ad4..61bd2160717c 100644 --- a/drivers/mtd/nand/bf5xx_nand.c +++ b/drivers/mtd/nand/bf5xx_nand.c @@ -566,7 +566,8 @@ static int bf5xx_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip } static int bf5xx_nand_write_page_raw(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf, int oob_required) + struct nand_chip *chip, const uint8_t *buf, int oob_required, + int page) { bf5xx_nand_write_buf(mtd, buf, mtd->writesize); bf5xx_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize); diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c index ea319a4058b7..7c1c306650a4 100644 --- a/drivers/mtd/nand/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/brcmnand/brcmnand.c @@ -1606,7 +1606,7 @@ out: } static int brcmnand_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { struct brcmnand_host *host = chip->priv; void *oob = oob_required ? chip->oob_poi : NULL; @@ -1617,7 +1617,7 @@ static int brcmnand_write_page(struct mtd_info *mtd, struct nand_chip *chip, static int brcmnand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf, - int oob_required) + int oob_required, int page) { struct brcmnand_host *host = chip->priv; void *oob = oob_required ? chip->oob_poi : NULL; diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c index aa1dc559f361..9de78d2a2eb1 100644 --- a/drivers/mtd/nand/cafe_nand.c +++ b/drivers/mtd/nand/cafe_nand.c @@ -516,7 +516,8 @@ static struct nand_bbt_descr cafe_bbt_mirror_descr_512 = { static int cafe_nand_write_page_lowlevel(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { struct cafe_priv *cafe = mtd->priv; diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index 0db16ef5604f..67eb2be0db87 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1114,7 +1114,7 @@ static int write_page(struct mtd_info *mtd, struct nand_chip *chip, * by write_page above. */ static int denali_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { /* * for regular page writes, we let HW handle all the ECC @@ -1129,7 +1129,8 @@ static int denali_write_page(struct mtd_info *mtd, struct nand_chip *chip, * write_page() function above. */ static int denali_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { /* * for raw page writes, we want to disable ECC and simply write diff --git a/drivers/mtd/nand/docg4.c b/drivers/mtd/nand/docg4.c index 510c12d41761..408cf69b854b 100644 --- a/drivers/mtd/nand/docg4.c +++ b/drivers/mtd/nand/docg4.c @@ -977,13 +977,13 @@ static int write_page(struct mtd_info *mtd, struct nand_chip *nand, } static int docg4_write_page_raw(struct mtd_info *mtd, struct nand_chip *nand, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { return write_page(mtd, nand, buf, false); } static int docg4_write_page(struct mtd_info *mtd, struct nand_chip *nand, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { return write_page(mtd, nand, buf, true); } @@ -1113,7 +1113,7 @@ static int docg4_block_markbad(struct mtd_info *mtd, loff_t ofs) /* write first page of block */ write_page_prologue(mtd, g4_addr); - docg4_write_page(mtd, nand, buf, 1); + docg4_write_page(mtd, nand, buf, 1, page); ret = pageprog(mtd); kfree(buf); diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c index 43cf0f961c3e..dcb1f7f4873f 100644 --- a/drivers/mtd/nand/fsl_elbc_nand.c +++ b/drivers/mtd/nand/fsl_elbc_nand.c @@ -715,7 +715,7 @@ static int fsl_elbc_read_page(struct mtd_info *mtd, struct nand_chip *chip, * waitfunc. */ static int fsl_elbc_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { fsl_elbc_write_buf(mtd, buf, mtd->writesize); fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize); @@ -728,7 +728,7 @@ static int fsl_elbc_write_page(struct mtd_info *mtd, struct nand_chip *chip, */ 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) + const uint8_t *buf, int oob_required, int page) { fsl_elbc_write_buf(mtd, buf, mtd->writesize); fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize); diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index b9dd41cba3af..7f4ac8c19001 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -772,7 +772,7 @@ static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip, * waitfunc. */ static int fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { fsl_ifc_write_buf(mtd, buf, mtd->writesize); fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize); diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c index 1dbcc8182f1b..2064adac1d17 100644 --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c @@ -1160,7 +1160,7 @@ static int gpmi_ecc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, } static int gpmi_ecc_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { struct gpmi_nand_data *this = chip->priv; struct bch_geometry *nfc_geo = &this->bch_geometry; @@ -1446,7 +1446,7 @@ static int gpmi_ecc_read_page_raw(struct mtd_info *mtd, static int gpmi_ecc_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf, - int oob_required) + int oob_required, int page) { struct gpmi_nand_data *this = chip->priv; struct bch_geometry *nfc_geo = &this->bch_geometry; @@ -1533,7 +1533,7 @@ static int gpmi_ecc_write_oob_raw(struct mtd_info *mtd, struct nand_chip *chip, { chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0, page); - return gpmi_ecc_write_page_raw(mtd, chip, NULL, 1); + return gpmi_ecc_write_page_raw(mtd, chip, NULL, 1, page); } static int gpmi_block_markbad(struct mtd_info *mtd, loff_t ofs) @@ -1717,7 +1717,7 @@ 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); chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); - chip->ecc.write_page_raw(mtd, chip, buffer, 0); + chip->ecc.write_page_raw(mtd, chip, buffer, 0, page); chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); /* Wait for the write to finish. */ diff --git a/drivers/mtd/nand/hisi504_nand.c b/drivers/mtd/nand/hisi504_nand.c index 6099aaa5ee40..0cb2e886937d 100644 --- a/drivers/mtd/nand/hisi504_nand.c +++ b/drivers/mtd/nand/hisi504_nand.c @@ -590,7 +590,8 @@ static int hisi_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, } static int hisi_nand_write_page_hwecc(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf, int oob_required) + struct nand_chip *chip, const uint8_t *buf, int oob_required, + int page) { chip->write_buf(mtd, buf, mtd->writesize); if (oob_required) diff --git a/drivers/mtd/nand/lpc32xx_mlc.c b/drivers/mtd/nand/lpc32xx_mlc.c index 65b7e03a0f5b..9686d025d4c9 100644 --- a/drivers/mtd/nand/lpc32xx_mlc.c +++ b/drivers/mtd/nand/lpc32xx_mlc.c @@ -495,7 +495,8 @@ static int lpc32xx_read_page(struct mtd_info *mtd, struct nand_chip *chip, static int lpc32xx_write_page_lowlevel(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { struct lpc32xx_nand_host *host = chip->priv; const uint8_t *oobbuf = chip->oob_poi; diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c index cbf4501090b8..40c06b2e6229 100644 --- a/drivers/mtd/nand/lpc32xx_slc.c +++ b/drivers/mtd/nand/lpc32xx_slc.c @@ -663,7 +663,8 @@ static int lpc32xx_nand_read_page_raw_syndrome(struct mtd_info *mtd, */ static int lpc32xx_nand_write_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, + int oob_required, int page) { struct lpc32xx_nand_host *host = chip->priv; uint8_t *pb = chip->oob_poi + chip->ecc.layout->eccpos[0]; @@ -692,7 +693,7 @@ static int lpc32xx_nand_write_page_syndrome(struct mtd_info *mtd, static int lpc32xx_nand_write_page_raw_syndrome(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf, - int oob_required) + int oob_required, int page) { /* Raw writes can just use the FIFO interface */ chip->write_buf(mtd, buf, chip->ecc.size * chip->ecc.steps); diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index a8230b164f49..d87c7d0b4675 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2155,11 +2155,12 @@ out: * @chip: nand chip info structure * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write * * Not for syndrome calculating ECC controllers, which use a special oob layout. */ static int nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { chip->write_buf(mtd, buf, mtd->writesize); if (oob_required) @@ -2174,12 +2175,14 @@ static int nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, * @chip: nand chip info structure * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write * * We need a special oob layout and handling even when ECC isn't checked. */ static int nand_write_page_raw_syndrome(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { int eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; @@ -2216,9 +2219,11 @@ static int nand_write_page_raw_syndrome(struct mtd_info *mtd, * @chip: nand chip info structure * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write */ static int nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { int i, eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; @@ -2234,7 +2239,7 @@ static int nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, for (i = 0; i < chip->ecc.total; i++) chip->oob_poi[eccpos[i]] = ecc_calc[i]; - return chip->ecc.write_page_raw(mtd, chip, buf, 1); + return chip->ecc.write_page_raw(mtd, chip, buf, 1, page); } /** @@ -2243,9 +2248,11 @@ static int nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, * @chip: nand chip info structure * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write */ static int nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { int i, eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; @@ -2277,11 +2284,12 @@ static int nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, * @data_len: data length * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write */ static int nand_write_subpage_hwecc(struct mtd_info *mtd, struct nand_chip *chip, uint32_t offset, uint32_t data_len, const uint8_t *buf, - int oob_required) + int oob_required, int page) { uint8_t *oob_buf = chip->oob_poi; uint8_t *ecc_calc = chip->buffers->ecccalc; @@ -2336,13 +2344,15 @@ static int nand_write_subpage_hwecc(struct mtd_info *mtd, * @chip: nand chip info structure * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page number to write * * The hw generator calculates the error syndrome automatically. Therefore we * need a special oob layout and handling. */ static int nand_write_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { int i, eccsize = chip->ecc.size; int eccbytes = chip->ecc.bytes; @@ -2406,12 +2416,13 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, if (unlikely(raw)) status = chip->ecc.write_page_raw(mtd, chip, buf, - oob_required); + oob_required, page); else if (subpage) status = chip->ecc.write_subpage(mtd, chip, offset, data_len, - buf, oob_required); + buf, oob_required, page); else - status = chip->ecc.write_page(mtd, chip, buf, oob_required); + status = chip->ecc.write_page(mtd, chip, buf, oob_required, + page); if (status < 0) return status; diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 7fbf00962709..93f664cd1c90 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -1500,11 +1500,12 @@ static int omap_elm_correct_data(struct mtd_info *mtd, u_char *data, * @chip: nand chip info structure * @buf: data buffer * @oob_required: must write chip->oob_poi to OOB + * @page: page * * Custom write page method evolved to support multi sector writing in one shot */ static int omap_write_page_bch(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { int i; uint8_t *ecc_calc = chip->buffers->ecccalc; diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index 0024a9c35631..17d7a23f72b2 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -1160,7 +1160,8 @@ static void nand_cmdfunc_extended(struct mtd_info *mtd, } static int pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf, int oob_required) + struct nand_chip *chip, const uint8_t *buf, int oob_required, + int page) { chip->write_buf(mtd, buf, mtd->writesize); chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c index 2e4f762775d5..bcba1a924c75 100644 --- a/drivers/mtd/nand/sh_flctl.c +++ b/drivers/mtd/nand/sh_flctl.c @@ -569,7 +569,8 @@ static int flctl_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, } static int flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { chip->write_buf(mtd, buf, mtd->writesize); chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c index d8b809b13c0e..ef46ac66248b 100644 --- a/drivers/mtd/nand/sunxi_nand.c +++ b/drivers/mtd/nand/sunxi_nand.c @@ -752,7 +752,8 @@ static int sunxi_nfc_hw_ecc_read_page(struct mtd_info *mtd, static int sunxi_nfc_hw_ecc_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, + int page) { struct nand_ecc_ctrl *ecc = &chip->ecc; int ret, i, cur_off = 0; @@ -815,7 +816,7 @@ static int sunxi_nfc_hw_syndrome_ecc_read_page(struct mtd_info *mtd, static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf, - int oob_required) + int oob_required, int page) { struct nand_ecc_ctrl *ecc = &chip->ecc; int ret, i, cur_off = 0; diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c index ae1f84e3d635..d275691dbb7c 100644 --- a/drivers/mtd/nand/vf610_nfc.c +++ b/drivers/mtd/nand/vf610_nfc.c @@ -612,7 +612,7 @@ static int vf610_nfc_read_page(struct mtd_info *mtd, struct nand_chip *chip, } static int vf610_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required) + const uint8_t *buf, int oob_required, int page) { struct vf610_nfc *nfc = mtd_to_nfc(mtd); diff --git a/drivers/staging/mt29f_spinand/mt29f_spinand.c b/drivers/staging/mt29f_spinand/mt29f_spinand.c index 9a8ddbb0191f..405b643189fd 100644 --- a/drivers/staging/mt29f_spinand/mt29f_spinand.c +++ b/drivers/staging/mt29f_spinand/mt29f_spinand.c @@ -612,7 +612,8 @@ static int spinand_erase_block(struct spi_device *spi_nand, u16 block_id) #ifdef CONFIG_MTD_SPINAND_ONDIEECC static int spinand_write_page_hwecc(struct mtd_info *mtd, - struct nand_chip *chip, const uint8_t *buf, int oob_required) + struct nand_chip *chip, const uint8_t *buf, int oob_required, + int page) { const uint8_t *p = buf; int eccsize = chip->ecc.size; diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 50e1f94fa377..5a9d1d4c2487 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -504,16 +504,16 @@ struct nand_ecc_ctrl { int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int oob_required, int page); int (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required); + const uint8_t *buf, int oob_required, int page); int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int oob_required, int page); int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip, uint32_t offs, uint32_t len, uint8_t *buf, int page); int (*write_subpage)(struct mtd_info *mtd, struct nand_chip *chip, uint32_t offset, uint32_t data_len, - const uint8_t *data_buf, int oob_required); + const uint8_t *data_buf, int oob_required, int page); int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, - const uint8_t *buf, int oob_required); + const uint8_t *buf, int oob_required, int page); int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip, int page); int (*read_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,