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spl, nand: add 4bit HW ecc oob first nand_read_page function

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Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Scott Wood <scottwood@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Heiko Schocher 2011-07-16 00:06:49 +00:00 • committed by Scott Wood
parent b4b1e769b8
commit dc7cd8e59b
1 changed files with 42 additions and 0 deletions
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42
nand_spl/nand_boot.c
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@ -135,6 +135,47 @@ static int nand_is_bad_block(struct mtd_info *mtd, int block)
return 0; 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) static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
{ {
struct nand_chip *this = mtd->priv; 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; return 0;
} }
#endif /* #if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST) */
static int nand_load(struct mtd_info *mtd, unsigned int offs, static int nand_load(struct mtd_info *mtd, unsigned int offs,
unsigned int uboot_size, uchar *dst) unsigned int uboot_size, uchar *dst)