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authorBaruch Siach <baruch@tkos.co.il>2015-05-13 11:17:39 +0300
committerBrian Norris <computersforpeace@gmail.com>2015-05-20 21:32:18 -0700
commit8eeb4c521a8047ea73da0d6eb2d87a7f60cdd99a (patch)
tree93d0c20a09775351094764cf91147e4993d83245 /drivers/mtd/nand/mxc_nand.c
parentc19900edff983cfa2ddb92830d59f8e9550fde4f (diff)
downloadop-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>
Diffstat (limited to 'drivers/mtd/nand/mxc_nand.c')
-rw-r--r--drivers/mtd/nand/mxc_nand.c22
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
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