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From 4f28237a750afd1112b6f1266d36f8b718efe89c Mon Sep 17 00:00:00 2001
From: Xiangfu Liu <xiangfu@sharism.cc>
Date: Tue, 6 Mar 2012 11:19:26 +0800
Subject: [PATCH 05/21] NAND-Optimize-reading-the-eec-data-for-the-JZ4740
---
drivers/mtd/nand/nand_base.c | 14 ++++----------
1 files changed, 4 insertions(+), 10 deletions(-)
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1300,8 +1300,8 @@ static int nand_read_page_hwecc_oob_firs
/* Read the OOB area first */
if (mtd->writesize > 512) {
- chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page);
+ chip->read_buf(mtd, ecc_code, chip->ecc.total);
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1);
} else {
chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
@@ -1309,9 +1309,6 @@ static int nand_read_page_hwecc_oob_firs
chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
}
- for (i = 0; i < chip->ecc.total; i++)
- ecc_code[i] = chip->oob_poi[eccpos[i]];
-
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
int stat;
@@ -1368,8 +1365,8 @@ static int nand_read_subpage_hwecc_oob_f
/* Read the OOB area first */
if (mtd->writesize > 512) {
- chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page);
+ chip->read_buf(mtd, ecc_code, chip->ecc.total);
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1);
} else {
chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
@@ -1377,9 +1374,6 @@ static int nand_read_subpage_hwecc_oob_f
chip->cmdfunc(mtd, NAND_CMD_READ0, data_col_addr, page);
}
- for (i = 0; i < chip->ecc.total; i++)
- ecc_code[i] = chip->oob_poi[eccpos[i]];
-
p = bufpoi + data_col_addr;
for (i = eccbytes * start_step; num_steps; num_steps--, i += eccbytes, p += eccsize) {
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