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nand/fsl_elbc: detect page size at runtime

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This avoids needing a separate U-Boot config when some revisions
of a board have small-page NAND and other revisions have large-page
NAND (except for NAND SPL targets).

CONFIG_FSL_ELBC_FMR is removed -- it was never used nor documented, and
it gets in the way of this change.

Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Scott Wood 2013-02-26 13:00:50 +00:00
parent 8bcb6f43e9
commit 98d9d92359
1 changed files with 22 additions and 17 deletions
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39
drivers/mtd/nand/fsl_elbc_nand.c
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@ -756,20 +756,8 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr)
nand->ecc.read_page = fsl_elbc_read_page;
nand->ecc.write_page = fsl_elbc_write_page;
#ifdef CONFIG_FSL_ELBC_FMR
priv->fmr = CONFIG_FSL_ELBC_FMR;
#else
priv->fmr = (15 << FMR_CWTO_SHIFT) | (2 << FMR_AL_SHIFT);
/*
* Hardware expects small page has ECCM0, large page has ECCM1
* when booting from NAND. Board config can override if not
* booting from NAND.
*/
if (or & OR_FCM_PGS)
priv->fmr |= FMR_ECCM;
#endif
/* If CS Base Register selects full hardware ECC then use it */
if ((br & BR_DECC) == BR_DECC_CHK_GEN) {
nand->ecc.mode = NAND_ECC_HW;
@ -786,11 +774,26 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr)
nand->ecc.mode = NAND_ECC_SOFT;
}
ret = nand_scan_ident(mtd, 1, NULL);
if (ret)
return ret;
/* Large-page-specific setup */
if (or & OR_FCM_PGS) {
if (mtd->writesize == 2048) {
setbits_be32(&elbc_ctrl->regs->bank[priv->bank].or,
OR_FCM_PGS);
in_be32(&elbc_ctrl->regs->bank[priv->bank].or);
priv->page_size = 1;
nand->badblock_pattern = &largepage_memorybased;
/*
* Hardware expects small page has ECCM0, large page has
* ECCM1 when booting from NAND, and we follow that even
* when not booting from NAND.
*/
priv->fmr |= FMR_ECCM;
/* adjust ecc setup if needed */
if ((br & BR_DECC) == BR_DECC_CHK_GEN) {
nand->ecc.steps = 4;
@ -798,12 +801,14 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr)
&fsl_elbc_oob_lp_eccm1 :
&fsl_elbc_oob_lp_eccm0;
}
} else if (mtd->writesize == 512) {
clrbits_be32(&elbc_ctrl->regs->bank[priv->bank].or,
OR_FCM_PGS);
in_be32(&elbc_ctrl->regs->bank[priv->bank].or);
} else {
return -ENODEV;
}
ret = nand_scan_ident(mtd, 1, NULL);
if (ret)
return ret;
ret = nand_scan_tail(mtd);
if (ret)
return ret;