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45 lines
1.6 KiB
Diff
45 lines
1.6 KiB
Diff
From a525f2fabe86dfd4a1acc057afcb31de319ca3e5 Mon Sep 17 00:00:00 2001
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From: Xiangfu Liu <xiangfu@macbook.(none)>
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Date: Fri, 19 Aug 2011 15:45:39 +0800
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Subject: [PATCH 19/32] 902-NAND-Optimize-NAND_ECC_HW_OOB_FIRST-read.patch
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---
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drivers/mtd/nand/nand_base.c | 14 ++++++++++----
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1 files changed, 10 insertions(+), 4 deletions(-)
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diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
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index a46e9bb..a9afe23 100644
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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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@@ -1305,9 +1305,15 @@ static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd,
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uint8_t *ecc_calc = chip->buffers->ecccalc;
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/* Read the OOB area first */
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- chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
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- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
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- chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
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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_RNDOUT, 0, -1);
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+ } else {
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+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
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+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
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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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@@ -1477,7 +1483,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
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if (realpage != chip->pagebuf || oob) {
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bufpoi = aligned ? buf : chip->buffers->databuf;
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- if (likely(sndcmd)) {
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+ if (likely(sndcmd) && chip->ecc.mode != NAND_ECC_HW_OOB_FIRST) {
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chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
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sndcmd = 0;
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}
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--
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1.7.4.1
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