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mtd: mxc_nand: generate nand_ecclayout for 8 bit ECC

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Hardware 8 bit ECC requires a different nand_ecclayout. Instead of adding yet
another static struct nand_ecclayout, generate it in code.

Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Baruch Siach 2015-05-13 11:17:39 +03:00 committed by Brian Norris
parent c19900edff
commit 8eeb4c521a
1 changed files with 21 additions and 1 deletions
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22
drivers/mtd/nand/mxc_nand.c
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@ -960,6 +960,23 @@ static int get_eccsize(struct mtd_info *mtd)
return 8;
}
static void ecc_8bit_layout_4k(struct nand_ecclayout *layout)
{
int i, j;
layout->eccbytes = 8*18;
for (i = 0; i < 8; i++)
for (j = 0; j < 18; j++)
layout->eccpos[i*18 + j] = i*26 + j + 7;
layout->oobfree[0].offset = 2;
layout->oobfree[0].length = 4;
for (i = 1; i < 8; i++) {
layout->oobfree[i].offset = i*26;
layout->oobfree[i].length = 7;
}
}
static void preset_v1(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd->priv;
@ -1636,8 +1653,11 @@ static int mxcnd_probe(struct platform_device *pdev)
if (mtd->writesize == 2048)
this->ecc.layout = host->devtype_data->ecclayout_2k;
else if (mtd->writesize == 4096)
else if (mtd->writesize == 4096) {
this->ecc.layout = host->devtype_data->ecclayout_4k;
if (get_eccsize(mtd) == 8)
ecc_8bit_layout_4k(this->ecc.layout);
}
/*
* Experimentation shows that i.MX NFC can only handle up to 218 oob