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mtd: rawnand: fsl_elbc: Use ECC configuration from device tree 

Initialize ECC configuration after nand_scan_ident() call and only in case
nand_scan_ident() have not done it. nand_scan_ident() fills ECC
configuration from device tree.

Fixes usage of NAND_ECC_SOFT_BCH when it is specified in device tree.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Pali Rohár 2022-04-04 18:17:20 +02:00 committed by Priyanka Jain
parent da98ddaf73
commit c9ea9019c5
1 changed files with 29 additions and 26 deletions
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55
drivers/mtd/nand/raw/fsl_elbc_nand.c
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@ -737,37 +737,40 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr, ofnode flash_node)
nand->controller = &elbc_ctrl->controller;
nand_set_controller_data(nand, priv);
nand->ecc.read_page = fsl_elbc_read_page;
nand->ecc.write_page = fsl_elbc_write_page;
nand->ecc.write_subpage = fsl_elbc_write_subpage;
priv->fmr = (15 << FMR_CWTO_SHIFT) | (2 << FMR_AL_SHIFT);
/* 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;
nand->ecc.layout = (priv->fmr & FMR_ECCM) ?
&fsl_elbc_oob_sp_eccm1 :
&fsl_elbc_oob_sp_eccm0;
nand->ecc.size = 512;
nand->ecc.bytes = 3;
nand->ecc.steps = 1;
nand->ecc.strength = 1;
} else {
/* otherwise fall back to software ECC */
#if defined(CONFIG_NAND_ECC_BCH)
nand->ecc.mode = NAND_ECC_SOFT_BCH;
#else
nand->ecc.mode = NAND_ECC_SOFT;
#endif
}
ret = nand_scan_ident(mtd, 1, NULL);
if (ret)
return ret;
/* If nand_scan_ident() has not selected ecc.mode, do it now */
if (nand->ecc.mode == NAND_ECC_NONE) {
/* 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;
nand->ecc.layout = (priv->fmr & FMR_ECCM) ?
&fsl_elbc_oob_sp_eccm1 :
&fsl_elbc_oob_sp_eccm0;
nand->ecc.size = 512;
nand->ecc.bytes = 3;
nand->ecc.steps = 1;
nand->ecc.strength = 1;
} else {
/* otherwise fall back to software ECC */
#if defined(CONFIG_NAND_ECC_BCH)
nand->ecc.mode = NAND_ECC_SOFT_BCH;
#else
nand->ecc.mode = NAND_ECC_SOFT;
#endif
}
}
if (nand->ecc.mode == NAND_ECC_HW) {
nand->ecc.read_page = fsl_elbc_read_page;
nand->ecc.write_page = fsl_elbc_write_page;
nand->ecc.write_subpage = fsl_elbc_write_subpage;
}
/* Large-page-specific setup */
if (mtd->writesize == 2048) {
setbits_be32(&elbc_ctrl->regs->bank[priv->bank].or,
@ -785,7 +788,7 @@ static int fsl_elbc_chip_init(int devnum, u8 *addr, ofnode flash_node)
priv->fmr |= FMR_ECCM;
/* adjust ecc setup if needed */
if ((br & BR_DECC) == BR_DECC_CHK_GEN) {
if (nand->ecc.mode == NAND_ECC_HW) {
nand->ecc.steps = 4;
nand->ecc.layout = (priv->fmr & FMR_ECCM) ?
&fsl_elbc_oob_lp_eccm1 :