From 4f28237a750afd1112b6f1266d36f8b718efe89c Mon Sep 17 00:00:00 2001 From: Xiangfu Liu 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 @@ -1295,8 +1295,8 @@ 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); @@ -1304,9 +1304,6 @@ 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; @@ -1361,8 +1358,8 @@ 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); @@ -1370,9 +1367,6 @@ 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) {