target/linux/adm5120/patches/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 @@ -47,12 +47,19 @@
   4  #define MANUFACTURER_AMD       0x0001
   5  #define MANUFACTURER_ATMEL     0x001F
   6  #define MANUFACTURER_SST       0x00BF
   7 +#define MANUFACTURER_MACRONIX  0x00C2
   8  #define SST49LF004B            0x0060
   9  #define SST49LF040B            0x0050
  10  #define SST49LF008A            0x005a
  11  #define AT49BV6416             0x00d6
  12  #define MANUFACTURER_SAMSUNG   0x00ec
  13
  14 +/* Macronix */
  15 +#define MX29LV160B     0x2249  /* MX29LV160 Bottom-boot chip */
  16 +#define MX29LV160T     0x22C4  /* MX29LV160 Top-boot chip */
  17 +#define MX29LV320B     0x22A8  /* MX29LV320 Bottom-boot chip */
  18 +#define MX29LV320T     0x22A7  /* MX29LV320 Top-boot chip */
  19 +
  20  static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
  21  static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
  22  static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
  23 @@ -217,6 +224,41 @@
  24         mtd->flags |= MTD_STUPID_LOCK;
  25  }
  26
  27 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  28 +/*
  29 + * Some Macronix chips has no/bad bootblock information in the CFI table
  30 + */
  31 +static void fixup_macronix_bootloc(struct mtd_info *mtd, void* param)
  32 +{
  33 +       struct map_info *map = mtd->priv;
  34 +       struct cfi_private *cfi = map->fldrv_priv;
  35 +       struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
  36 +       __u8 t;
  37 +
  38 +       switch (cfi->id) {
  39 +       /* TODO: put affected chip ids here */
  40 +       case MX29LV160B:
  41 +       case MX29LV320B:
  42 +               t = 2;  /* Bottom boot */
  43 +               break;
  44 +       case MX29LV160T:
  45 +       case MX29LV320T:
  46 +               t = 3;  /* Top boot */
  47 +               break;
  48 +       default:
  49 +               return;
  50 +       }
  51 +
  52 +       if (extp->TopBottom == t)
  53 +               /* boot location detected by the CFI layer is correct */
  54 +               return;
  55 +
  56 +       extp->TopBottom = t;
  57 +       printk("%s: Macronix chip detected, id:0x%04X, boot location forced "
  58 +               "to %s\n", map->name, cfi->id, (t == 2) ? "bottom" : "top");
  59 +}
  60 +#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */
  61 +
  62  static struct cfi_fixup cfi_fixup_table[] = {
  63  #ifdef AMD_BOOTLOC_BUG
  64         { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
  65 @@ -231,6 +273,9 @@
  66         { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
  67  #endif
  68         { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
  69 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  70 +       { MANUFACTURER_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc, NULL, },
  71 +#endif
  72         { 0, 0, NULL, NULL }
  73  };
  74  static struct cfi_fixup jedec_fixup_table[] = {
  75 --- a/drivers/mtd/chips/Kconfig
  76 +++ b/drivers/mtd/chips/Kconfig
  77 @@ -196,6 +196,14 @@
  78           provides support for one of those command sets, used on chips
  79           including the AMD Am29LV320.
  80
  81 +config MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  82 +       bool "Fix boot-block location for Macronix flash chips"
  83 +       depends on MTD_CFI_AMDSTD
  84 +       help
  85 +         Some Macronix flash chips have no/wrong boot-block location in the
  86 +         CFI table, and the driver may detect the type incorrectly. Select
  87 +         this if your board has such chip.
  88 +
  89  config MTD_CFI_STAA
  90         tristate "Support for ST (Advanced Architecture) flash chips"
  91         depends on MTD_GEN_PROBE