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authorBryan Wu <bryan.wu@analog.com>2008-01-30 17:18:18 +0800
committerDavid Woodhouse <dwmw2@infradead.org>2008-02-03 18:55:16 +1100
commit5eb91034f3d825f43b3c8ace7b69f94752b7deda (patch)
treec823f041b73f415b35f6c42f63861f3fdd152e86 /drivers/mtd
parentf4dda0914e76feb1ff5ec349cc68f319f6a4e40f (diff)
downloadlinux-5eb91034f3d825f43b3c8ace7b69f94752b7deda.tar.bz2
[MTD] [NAND] Fix Blackfin NFC ECC calculating bug with page size 512 bytes
Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/bf5xx_nand.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c
index 2fe9678e7545..7d6ac6a7d9a7 100644
--- a/drivers/mtd/nand/bf5xx_nand.c
+++ b/drivers/mtd/nand/bf5xx_nand.c
@@ -293,7 +293,6 @@ static int bf5xx_nand_calculate_ecc(struct mtd_info *mtd,
u16 ecc0, ecc1;
u32 code[2];
u8 *p;
- int bytes = 3, i;
/* first 4 bytes ECC code for 256 page size */
ecc0 = bfin_read_NFC_ECC0();
@@ -303,19 +302,24 @@ static int bf5xx_nand_calculate_ecc(struct mtd_info *mtd,
dev_dbg(info->device, "returning ecc 0x%08x\n", code[0]);
+ /* first 3 bytes in ecc_code for 256 page size */
+ p = (u8 *) code;
+ memcpy(ecc_code, p, 3);
+
/* second 4 bytes ECC code for 512 page size */
if (page_size == 512) {
ecc0 = bfin_read_NFC_ECC2();
ecc1 = bfin_read_NFC_ECC3();
code[1] = (ecc0 & 0x3FF) | ((ecc1 & 0x3FF) << 11);
- bytes = 6;
+
+ /* second 3 bytes in ecc_code for second 256
+ * bytes of 512 page size
+ */
+ p = (u8 *) (code + 1);
+ memcpy((ecc_code + 3), p, 3);
dev_dbg(info->device, "returning ecc 0x%08x\n", code[1]);
}
- p = (u8 *)code;
- for (i = 0; i < bytes; i++)
- ecc_code[i] = p[i];
-
return 0;
}