target/linux/xburst/patches-3.2/0005-NAND-Optimize-reading-the-eec-data-for-the-JZ4740.patch

   1 From 4f28237a750afd1112b6f1266d36f8b718efe89c Mon Sep 17 00:00:00 2001
   2 From: Xiangfu Liu <xiangfu@sharism.cc>
   3 Date: Tue, 6 Mar 2012 11:19:26 +0800
   4 Subject: [PATCH 05/21] NAND-Optimize-reading-the-eec-data-for-the-JZ4740
   5
   6 ---
   7  drivers/mtd/nand/nand_base.c |   14 ++++----------
   8  1 files changed, 4 insertions(+), 10 deletions(-)
   9
  10 --- a/drivers/mtd/nand/nand_base.c
  11 +++ b/drivers/mtd/nand/nand_base.c
  12 @@ -1295,8 +1295,8 @@ static int nand_read_page_hwecc_oob_firs
  13
  14         /* Read the OOB area first */
  15         if (mtd->writesize > 512) {
  16 -               chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
  17 -               chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
  18 +               chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page);
  19 +               chip->read_buf(mtd, ecc_code, chip->ecc.total);
  20                 chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1);
  21         } else {
  22                 chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
  23 @@ -1304,9 +1304,6 @@ static int nand_read_page_hwecc_oob_firs
  24                 chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
  25         }
  26
  27 -       for (i = 0; i < chip->ecc.total; i++)
  28 -               ecc_code[i] = chip->oob_poi[eccpos[i]];
  29 -
  30         for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
  31                 int stat;
  32
  33 @@ -1361,8 +1358,8 @@ static int nand_read_subpage_hwecc_oob_f
  34
  35         /* Read the OOB area first */
  36         if (mtd->writesize > 512) {
  37 -               chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
  38 -               chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
  39 +               chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize + eccpos[0], page);
  40 +               chip->read_buf(mtd, ecc_code, chip->ecc.total);
  41                 chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1);
  42         } else {
  43                 chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
  44 @@ -1370,9 +1367,6 @@ static int nand_read_subpage_hwecc_oob_f
  45                 chip->cmdfunc(mtd, NAND_CMD_READ0, data_col_addr, page);
  46         }
  47
  48 -       for (i = 0; i < chip->ecc.total; i++)
  49 -               ecc_code[i] = chip->oob_poi[eccpos[i]];
  50 -
  51         p = bufpoi + data_col_addr;
  52
  53         for (i = eccbytes * start_step; num_steps; num_steps--, i += eccbytes, p += eccsize) {