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54 lines
1.9 KiB
Diff
54 lines
1.9 KiB
Diff
From 4f28237a750afd1112b6f1266d36f8b718efe89c Mon Sep 17 00:00:00 2001
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From: Xiangfu Liu <xiangfu@sharism.cc>
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Date: Tue, 6 Mar 2012 11:19:26 +0800
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Subject: [PATCH 05/21] NAND-Optimize-reading-the-eec-data-for-the-JZ4740
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---
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drivers/mtd/nand/nand_base.c | 14 ++++----------
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1 files changed, 4 insertions(+), 10 deletions(-)
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--- a/drivers/mtd/nand/nand_base.c
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+++ b/drivers/mtd/nand/nand_base.c
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@@ -1295,8 +1295,8 @@ static int nand_read_page_hwecc_oob_firs
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/* Read the OOB area first */
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if (mtd->writesize > 512) {
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- chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
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- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
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+ chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page);
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+ chip->read_buf(mtd, ecc_code, chip->ecc.total);
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chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1);
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} else {
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chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
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@@ -1304,9 +1304,6 @@ static int nand_read_page_hwecc_oob_firs
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chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
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}
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- for (i = 0; i < chip->ecc.total; i++)
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- ecc_code[i] = chip->oob_poi[eccpos[i]];
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-
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for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
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int stat;
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@@ -1361,8 +1358,8 @@ static int nand_read_subpage_hwecc_oob_f
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/* Read the OOB area first */
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if (mtd->writesize > 512) {
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- chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
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- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
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+ chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page);
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+ chip->read_buf(mtd, ecc_code, chip->ecc.total);
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chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1);
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} else {
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chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
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@@ -1370,9 +1367,6 @@ static int nand_read_subpage_hwecc_oob_f
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chip->cmdfunc(mtd, NAND_CMD_READ0, data_col_addr, page);
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}
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- for (i = 0; i < chip->ecc.total; i++)
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- ecc_code[i] = chip->oob_poi[eccpos[i]];
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-
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p = bufpoi + data_col_addr;
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for (i = eccbytes * start_step; num_steps; num_steps--, i += eccbytes, p += eccsize) {
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