target/linux/s3c24xx/patches/0021-s3c24xx-nand-largepage.patch.patch

   1 From 68108d95040732cebf06296affaaeaaf76029c3d Mon Sep 17 00:00:00 2001
   2 From: mokopatches <mokopatches@openmoko.org>
   3 Date: Wed, 16 Jul 2008 14:44:50 +0100
   4 Subject: [PATCH] s3c24xx-nand-largepage.patch
   5  MTD: S3C24XX large page NAND support
   6
   7 This adds support for using large page NAND devices
   8 with the S3C24XX NAND controller. This also adds the
   9 file Documentation/arm/Samsung-S3C24XX/NAND.txt to
  10 describe the differences.
  11
  12 Signed-off-by: Ben Dooks <ben-linux@fluff.org>
  13 ---
  14  drivers/mtd/nand/s3c2410.c |   28 ++++++++++++++++++++++++++++
  15  1 files changed, 28 insertions(+), 0 deletions(-)
  16
  17 diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
  18 index cd2e1da..6e7a5b9 100644
  19 --- a/drivers/mtd/nand/s3c2410.c
  20 +++ b/drivers/mtd/nand/s3c2410.c
  21 @@ -726,6 +726,34 @@ static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
  22         }
  23  }
  24
  25 +/* s3c2410_nand_update_chip
  26 + *
  27 + * post-probe chip update, to change any items, such as the
  28 + * layout for large page nand
  29 + */
  30 +
  31 +static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
  32 +                                    struct s3c2410_nand_mtd *nmtd)
  33 +{
  34 +       struct nand_chip *chip = &nmtd->chip;
  35 +
  36 +       printk("%s: chip %p: %d\n", __func__, chip, chip->page_shift);
  37 +
  38 +       if (hardware_ecc) {
  39 +               /* change the behaviour depending on wether we are using
  40 +                * the large or small page nand device */
  41 +
  42 +               if (chip->page_shift > 10) {
  43 +                       chip->ecc.size      = 256;
  44 +                       chip->ecc.bytes     = 3;
  45 +               } else {
  46 +                       chip->ecc.size      = 512;
  47 +                       chip->ecc.bytes     = 3;
  48 +                       chip->ecc.layout    = &nand_hw_eccoob;
  49 +               }
  50 +       }
  51 +}
  52 +
  53  /* s3c2410_nand_probe
  54   *
  55   * called by device layer when it finds a device matching
  56 --
  57 1.5.6.3
  58