1 --- a/drivers/mtd/chips/cfi_cmdset_0002.c
2 +++ b/drivers/mtd/chips/cfi_cmdset_0002.c
4 #define SST49LF008A 0x005a
5 #define AT49BV6416 0x00d6
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 */
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 @@ -364,6 +370,41 @@ static struct cfi_fixup cfi_nopri_fixup_
20 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
22 + * Some Macronix chips has no/bad bootblock information in the CFI table
24 +static void fixup_macronix_bootloc(struct mtd_info *mtd)
26 + struct map_info *map = mtd->priv;
27 + struct cfi_private *cfi = map->fldrv_priv;
28 + struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
32 + /* TODO: put affected chip ids here */
35 + t = 2; /* Bottom boot */
39 + t = 3; /* Top boot */
45 + if (extp->TopBottom == t)
46 + /* boot location detected by the CFI layer is correct */
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");
53 +#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */
55 static struct cfi_fixup cfi_fixup_table[] = {
56 { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri },
57 #ifdef AMD_BOOTLOC_BUG
58 @@ -406,6 +447,9 @@ static struct cfi_fixup fixup_table[] =
60 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip },
61 { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock },
62 +#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
63 + { CFI_MFR_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc },
68 --- a/drivers/mtd/chips/Kconfig
69 +++ b/drivers/mtd/chips/Kconfig
70 @@ -188,6 +188,14 @@ config MTD_CFI_AMDSTD
71 provides support for one of those command sets, used on chips
72 including the AMD Am29LV320.
74 +config MTD_CFI_FIXUP_MACRONIX_BOOTLOC
75 + bool "Fix boot-block location for Macronix flash chips"
76 + depends on MTD_CFI_AMDSTD
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.
83 tristate "Support for ST (Advanced Architecture) flash chips"
84 depends on MTD_GEN_PROBE