target/linux/adm5120/patches-2.6.31/101-cfi_fixup_macronix_bootloc.patch

   1 --- a/drivers/mtd/chips/cfi_cmdset_0002.c
   2 +++ b/drivers/mtd/chips/cfi_cmdset_0002.c
   3 @@ -53,6 +53,12 @@
   4  #define AT49BV6416             0x00d6
   5  #define MANUFACTURER_SAMSUNG   0x00ec
   6
   7 +/* Macronix */
   8 +#define MX29LV160B     0x2249  /* MX29LV160 Bottom-boot chip */
   9 +#define MX29LV160T     0x22C4  /* MX29LV160 Top-boot chip */
  10 +#define MX29LV320B     0x22A8  /* MX29LV320 Bottom-boot chip */
  11 +#define MX29LV320T     0x22A7  /* MX29LV320 Top-boot chip */
  12 +
  13  static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
  14  static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
  15  static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
  16 @@ -293,6 +299,41 @@ static void fixup_M29W128G_write_buffer(
  17         }
  18  }
  19
  20 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  21 +/*
  22 + * Some Macronix chips has no/bad bootblock information in the CFI table
  23 + */
  24 +static void fixup_macronix_bootloc(struct mtd_info *mtd, void* param)
  25 +{
  26 +       struct map_info *map = mtd->priv;
  27 +       struct cfi_private *cfi = map->fldrv_priv;
  28 +       struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
  29 +       __u8 t;
  30 +
  31 +       switch (cfi->id) {
  32 +       /* TODO: put affected chip ids here */
  33 +       case MX29LV160B:
  34 +       case MX29LV320B:
  35 +               t = 2;  /* Bottom boot */
  36 +               break;
  37 +       case MX29LV160T:
  38 +       case MX29LV320T:
  39 +               t = 3;  /* Top boot */
  40 +               break;
  41 +       default:
  42 +               return;
  43 +       }
  44 +
  45 +       if (extp->TopBottom == t)
  46 +               /* boot location detected by the CFI layer is correct */
  47 +               return;
  48 +
  49 +       extp->TopBottom = t;
  50 +       printk("%s: Macronix chip detected, id:0x%04X, boot location forced "
  51 +               "to %s\n", map->name, cfi->id, (t == 2) ? "bottom" : "top");
  52 +}
  53 +#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */
  54 +
  55  static struct cfi_fixup cfi_fixup_table[] = {
  56         { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
  57  #ifdef AMD_BOOTLOC_BUG
  58 @@ -330,6 +371,9 @@ static struct cfi_fixup fixup_table[] =
  59          */
  60         { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL },
  61         { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock, NULL },
  62 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  63 +       { MANUFACTURER_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc, NULL, },
  64 +#endif
  65         { 0, 0, NULL, NULL }
  66  };
  67
  68 --- a/drivers/mtd/chips/Kconfig
  69 +++ b/drivers/mtd/chips/Kconfig
  70 @@ -198,6 +198,14 @@ config MTD_CFI_AMDSTD
  71           provides support for one of those command sets, used on chips
  72           including the AMD Am29LV320.
  73
  74 +config MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  75 +       bool "Fix boot-block location for Macronix flash chips"
  76 +       depends on MTD_CFI_AMDSTD
  77 +       help
  78 +         Some Macronix flash chips have no/wrong boot-block location in the
  79 +         CFI table, and the driver may detect the type incorrectly. Select
  80 +         this if your board has such chip.
  81 +
  82  config MTD_CFI_STAA
  83         tristate "Support for ST (Advanced Architecture) flash chips"
  84         depends on MTD_GEN_PROBE