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| author | Heiko Schocher <hs@denx.de> | 2011-07-16 00:06:49 +0000 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2011-10-03 18:35:12 -0500 |
| commit | dc7cd8e59ba077f3b4c1a4557c9cd86a31b9ab1f (patch) | |
| tree | 291be8def80f4365c4a6a5cd8441f449146684ec | |
| parent | b4b1e769b8f6e80219da576d45a10c9e0ca5446b (diff) | |
| download | u-boot-imx-dc7cd8e59ba077f3b4c1a4557c9cd86a31b9ab1f.zip u-boot-imx-dc7cd8e59ba077f3b4c1a4557c9cd86a31b9ab1f.tar.gz u-boot-imx-dc7cd8e59ba077f3b4c1a4557c9cd86a31b9ab1f.tar.bz2 | |
spl, nand: add 4bit HW ecc oob first nand_read_page function
Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Scott Wood <scottwood@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
| -rw-r--r-- | nand_spl/nand_boot.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/nand_spl/nand_boot.c b/nand_spl/nand_boot.c index 4683c7c..615ef25 100644 --- a/nand_spl/nand_boot.c +++ b/nand_spl/nand_boot.c @@ -135,6 +135,47 @@ static int nand_is_bad_block(struct mtd_info *mtd, int block) return 0; } +#if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST) +static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst) +{ + struct nand_chip *this = mtd->priv; + u_char *ecc_calc; + u_char *ecc_code; + u_char *oob_data; + int i; + int eccsize = CONFIG_SYS_NAND_ECCSIZE; + int eccbytes = CONFIG_SYS_NAND_ECCBYTES; + int eccsteps = CONFIG_SYS_NAND_ECCSTEPS; + uint8_t *p = dst; + int stat; + + /* + * No malloc available for now, just use some temporary locations + * in SDRAM + */ + ecc_calc = (u_char *)(CONFIG_SYS_SDRAM_BASE + 0x10000); + ecc_code = ecc_calc + 0x100; + oob_data = ecc_calc + 0x200; + + nand_command(mtd, block, page, 0, NAND_CMD_READOOB); + this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE); + nand_command(mtd, block, page, 0, NAND_CMD_READ0); + + /* Pick the ECC bytes out of the oob data */ + for (i = 0; i < CONFIG_SYS_NAND_ECCTOTAL; i++) + ecc_code[i] = oob_data[nand_ecc_pos[i]]; + + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + this->ecc.hwctl(mtd, NAND_ECC_READ); + this->read_buf(mtd, p, eccsize); + this->ecc.calculate(mtd, p, &ecc_calc[i]); + stat = this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); + } + + return 0; +} +#else static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst) { struct nand_chip *this = mtd->priv; @@ -181,6 +222,7 @@ static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst) return 0; } +#endif /* #if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST) */ static int nand_load(struct mtd_info *mtd, unsigned int offs, unsigned int uboot_size, uchar *dst) |