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mtd: nand: omap: combine different flavours of 1-bit hamming ecc schemes

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OMAP NAND driver currently supports multiple flavours of 1-bit Hamming
ecc-scheme, like:
- OMAP_ECC_HAMMING_CODE_DEFAULT
	1-bit hamming ecc code using software library
- OMAP_ECC_HAMMING_CODE_HW
	1-bit hamming ecc-code using GPMC h/w engine
- OMAP_ECC_HAMMING_CODE_HW_ROMCODE
	1-bit hamming ecc-code using GPMC h/w engin with ecc-layout compatible
	to ROM code.

This patch combines above multiple ecc-schemes into single implementation:
- OMAP_ECC_HAM1_CODE_HW
	1-bit hamming ecc-code using GPMC h/w engine with ROM-code compatible
	ecc-layout.

Signed-off-by: Pekon Gupta <[email protected]>
Reviewed-by: Felipe Balbi <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Tested-by: Ezequiel Garcia <[email protected]>
Signed-off-by: Brian Norris <[email protected]>
This commit is contained in:
Pekon Gupta 2013-10-24 18:20:18 +05:30 • committed by Brian Norris
commit c66d039197
4 changed files with 9 additions and 17 deletions
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9
drivers/mtd/nand/omap2.c
View file

@ -1993,10 +1993,7 @@ static int omap_nand_probe(struct platform_device *pdev)
}
/* select the ecc type */
if (pdata->ecc_opt == OMAP_ECC_HAMMING_CODE_DEFAULT)
info->nand.ecc.mode = NAND_ECC_SOFT;
else if ((pdata->ecc_opt == OMAP_ECC_HAMMING_CODE_HW) ||
(pdata->ecc_opt == OMAP_ECC_HAMMING_CODE_HW_ROMCODE)) {
if (pdata->ecc_opt == OMAP_ECC_HAM1_CODE_HW) {
info->nand.ecc.bytes = 3;
info->nand.ecc.size = 512;
info->nand.ecc.strength = 1;
@ -2025,7 +2022,7 @@ static int omap_nand_probe(struct platform_device *pdev)
}
/* rom code layout */
if (pdata->ecc_opt == OMAP_ECC_HAMMING_CODE_HW_ROMCODE) {
if (pdata->ecc_opt == OMAP_ECC_HAM1_CODE_HW) {
if (info->nand.options & NAND_BUSWIDTH_16)
offset = 2;
@ -2033,7 +2030,7 @@ static int omap_nand_probe(struct platform_device *pdev)
offset = 1;
info->nand.badblock_pattern = &bb_descrip_flashbased;
}
omap_oobinfo.eccbytes = 3 * (info->mtd.oobsize/16);
omap_oobinfo.eccbytes = 3 * (info->mtd.writesize / 512);
for (i = 0; i < omap_oobinfo.eccbytes; i++)
omap_oobinfo.eccpos[i] = i+offset;