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[MTD] [NAND] Fix Blackfin NFC ECC calculating bug with page size 512 bytes

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Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Bryan Wu 2008-01-30 17:18:18 +08:00 committed by David Woodhouse
parent f4dda0914e
commit 5eb91034f3
1 changed files with 10 additions and 6 deletions
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16
drivers/mtd/nand/bf5xx_nand.c
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@ -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;
}