target/linux/s3c24xx/patches-2.6.31/300-s3c-nand.patch

   1 diff --git a/arch/arm/plat-s3c/include/plat/nand.h b/arch/arm/plat-s3c/include/plat/nand.h
   2 index 18f9588..fff94e6 100644
   3 --- a/arch/arm/plat-s3c/include/plat/nand.h
   4 +++ b/arch/arm/plat-s3c/include/plat/nand.h
   5 @@ -33,6 +33,8 @@ struct s3c2410_nand_set {
   6
   7         int                     nr_chips;
   8         int                     nr_partitions;
   9 +       unsigned int            flags;
  10 +#define S3C2410_NAND_BBT       0x0001
  11         char                    *name;
  12         int                     *nr_map;
  13         struct mtd_partition    *partitions;
  14 @@ -51,6 +53,9 @@ struct s3c2410_platform_nand {
  15         int                     nr_sets;
  16         struct s3c2410_nand_set *sets;
  17
  18 +       /* force software_ecc at runtime */
  19 +       int     software_ecc;
  20 +
  21         void                    (*select_chip)(struct s3c2410_nand_set *,
  22                                                int chip);
  23  };
  24 diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
  25 index 11dc7e6..59637ac 100644
  26 --- a/drivers/mtd/nand/s3c2410.c
  27 +++ b/drivers/mtd/nand/s3c2410.c
  28 @@ -491,7 +491,7 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
  29         if ((diff0 & ~(1<<fls(diff0))) == 0)
  30                 return 1;
  31
  32 -       return -1;
  33 +       return -EBADMSG;
  34  }
  35
  36  /* ECC functions
  37 @@ -774,9 +783,13 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
  38         chip->select_chip  = s3c2410_nand_select_chip;
  39         chip->chip_delay   = 50;
  40         chip->priv         = nmtd;
  41 -       chip->options      = 0;
  42         chip->controller   = &info->controller;
  43
  44 +       if (set->flags & S3C2410_NAND_BBT)
  45 +               chip->options      = NAND_USE_FLASH_BBT;
  46 +       else
  47 +               chip->options      = 0;
  48 +
  49         switch (info->cpu_type) {
  50         case TYPE_S3C2410:
  51                 chip->IO_ADDR_W = regs + S3C2410_NFDATA;
  52 @@ -816,7 +829,7 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
  53         nmtd->mtd.owner    = THIS_MODULE;
  54         nmtd->set          = set;
  55
  56 -       if (hardware_ecc) {
  57 +       if (!info->platform->software_ecc && hardware_ecc) {
  58                 chip->ecc.calculate = s3c2410_nand_calculate_ecc;
  59                 chip->ecc.correct   = s3c2410_nand_correct_data;
  60                 chip->ecc.mode      = NAND_ECC_HW;
  61