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| author | Baruch Siach <baruch@tkos.co.il> | 2015-05-13 11:17:39 +0300 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2015-05-20 21:32:18 -0700 |
| commit | 8eeb4c521a8047ea73da0d6eb2d87a7f60cdd99a (patch) | |
| tree | 93d0c20a09775351094764cf91147e4993d83245 | |
| parent | c19900edff983cfa2ddb92830d59f8e9550fde4f (diff) | |
| download | op-kernel-dev-8eeb4c521a8047ea73da0d6eb2d87a7f60cdd99a.zip op-kernel-dev-8eeb4c521a8047ea73da0d6eb2d87a7f60cdd99a.tar.gz | |
mtd: mxc_nand: generate nand_ecclayout for 8 bit ECC
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>
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 260d77d5..2426db8 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -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 |
