target/linux/adm5120-2.6/patches-2.6.22/101-cfi_fixup_macronix_bootloc.patch

   1 Index: linux-2.6.22.1/drivers/mtd/chips/cfi_cmdset_0002.c
   2 ===================================================================
   3 --- linux-2.6.22.1.orig/drivers/mtd/chips/cfi_cmdset_0002.c
   4 +++ linux-2.6.22.1/drivers/mtd/chips/cfi_cmdset_0002.c
   5 @@ -47,12 +47,19 @@
   6  #define MANUFACTURER_AMD       0x0001
   7  #define MANUFACTURER_ATMEL     0x001F
   8  #define MANUFACTURER_SST       0x00BF
   9 +#define MANUFACTURER_MACRONIX  0x00C2
  10  #define SST49LF004B            0x0060
  11  #define SST49LF040B            0x0050
  12  #define SST49LF008A            0x005a
  13  #define AT49BV6416             0x00d6
  14  #define MANUFACTURER_SAMSUNG   0x00ec
  15
  16 +/* Macronix */
  17 +#define MX29LV160B     0x2249  /* MX29LV160 Bottom-boot chip */
  18 +#define MX29LV160T     0x22C4  /* MX29LV160 Top-boot chip */
  19 +#define MX29LV320B     0x22A8  /* MX29LV320 Bottom-boot chip */
  20 +#define MX29LV320T     0x22A7  /* MX29LV320 Top-boot chip */
  21 +
  22  static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
  23  static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
  24  static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
  25 @@ -217,6 +224,41 @@ static void fixup_use_atmel_lock(struct
  26         mtd->flags |= MTD_STUPID_LOCK;
  27  }
  28
  29 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  30 +/*
  31 + * Some Macronix chips has no/bad bootblock information in the CFI table
  32 + */
  33 +static void fixup_macronix_bootloc(struct mtd_info *mtd, void* param)
  34 +{
  35 +       struct map_info *map = mtd->priv;
  36 +       struct cfi_private *cfi = map->fldrv_priv;
  37 +       struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
  38 +       __u8 t;
  39 +
  40 +       switch (cfi->id) {
  41 +       /* TODO: put affected chip ids here */
  42 +       case MX29LV160B:
  43 +       case MX29LV320B:
  44 +               t = 2;  /* Bottom boot */
  45 +               break;
  46 +       case MX29LV160T:
  47 +       case MX29LV320T:
  48 +               t = 3;  /* Top boot */
  49 +               break;
  50 +       default:
  51 +               return;
  52 +       }
  53 +
  54 +       if (extp->TopBottom == t)
  55 +               /* boot location detected by the CFI layer is correct */
  56 +               return;
  57 +
  58 +       extp->TopBottom = t;
  59 +       printk("%s: Macronix chip detected, id:0x%04X, boot location forced "
  60 +               "to %s\n", map->name, cfi->id, (t == 2) ? "bottom" : "top");
  61 +}
  62 +#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */
  63 +
  64  static struct cfi_fixup cfi_fixup_table[] = {
  65  #ifdef AMD_BOOTLOC_BUG
  66         { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
  67 @@ -231,6 +273,9 @@ static struct cfi_fixup cfi_fixup_table[
  68         { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
  69  #endif
  70         { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
  71 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  72 +       { MANUFACTURER_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc, NULL, },
  73 +#endif
  74         { 0, 0, NULL, NULL }
  75  };
  76  static struct cfi_fixup jedec_fixup_table[] = {
  77 Index: linux-2.6.22.1/drivers/mtd/chips/Kconfig
  78 ===================================================================
  79 --- linux-2.6.22.1.orig/drivers/mtd/chips/Kconfig
  80 +++ linux-2.6.22.1/drivers/mtd/chips/Kconfig
  81 @@ -196,6 +196,14 @@ config MTD_CFI_AMDSTD
  82           provides support for one of those command sets, used on chips
  83           including the AMD Am29LV320.
  84
  85 +config MTD_CFI_FIXUP_MACRONIX_BOOTLOC
  86 +       bool "Force bottom boot for Macronix flash chips"
  87 +       depends on MTD_CFI_AMDSTD
  88 +       help
  89 +         Some Macronix flash chips have no/wrong boot-block location in the
  90 +         CFI table, and the driver may detect the type incorrectly. Select
  91 +         this if your board has such chip.
  92 +
  93  config MTD_CFI_STAA
  94         tristate "Support for ST (Advanced Architecture) flash chips"
  95         depends on MTD_GEN_PROBE