diff options
Diffstat (limited to 'target/linux/adm5120/patches-3.3/101-cfi_fixup_macronix_bootloc.patch')
| -rw-r--r-- | target/linux/adm5120/patches-3.3/101-cfi_fixup_macronix_bootloc.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/adm5120/patches-3.3/101-cfi_fixup_macronix_bootloc.patch b/target/linux/adm5120/patches-3.3/101-cfi_fixup_macronix_bootloc.patch new file mode 100644 index 000000000..12f914a2a --- /dev/null +++ b/target/linux/adm5120/patches-3.3/101-cfi_fixup_macronix_bootloc.patch @@ -0,0 +1,84 @@ +--- a/drivers/mtd/chips/cfi_cmdset_0002.c ++++ b/drivers/mtd/chips/cfi_cmdset_0002.c +@@ -48,6 +48,12 @@ + #define SST49LF008A 0x005a + #define AT49BV6416 0x00d6 + ++/* Macronix */ ++#define MX29LV160B 0x2249 /* MX29LV160 Bottom-boot chip */ ++#define MX29LV160T 0x22C4 /* MX29LV160 Top-boot chip */ ++#define MX29LV320B 0x22A8 /* MX29LV320 Bottom-boot chip */ ++#define MX29LV320T 0x22A7 /* MX29LV320 Top-boot chip */ ++ + static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); + static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); + static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); +@@ -342,6 +348,41 @@ static struct cfi_fixup cfi_nopri_fixup_ + { 0, 0, NULL } + }; + ++#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC ++/* ++ * Some Macronix chips has no/bad bootblock information in the CFI table ++ */ ++static void fixup_macronix_bootloc(struct mtd_info *mtd) ++{ ++ struct map_info *map = mtd->priv; ++ struct cfi_private *cfi = map->fldrv_priv; ++ struct cfi_pri_amdstd *extp = cfi->cmdset_priv; ++ __u8 t; ++ ++ switch (cfi->id) { ++ /* TODO: put affected chip ids here */ ++ case MX29LV160B: ++ case MX29LV320B: ++ t = 2; /* Bottom boot */ ++ break; ++ case MX29LV160T: ++ case MX29LV320T: ++ t = 3; /* Top boot */ ++ break; ++ default: ++ return; ++ } ++ ++ if (extp->TopBottom == t) ++ /* boot location detected by the CFI layer is correct */ ++ return; ++ ++ extp->TopBottom = t; ++ printk("%s: Macronix chip detected, id:0x%04X, boot location forced " ++ "to %s\n", map->name, cfi->id, (t == 2) ? "bottom" : "top"); ++} ++#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */ ++ + static struct cfi_fixup cfi_fixup_table[] = { + { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri }, + #ifdef AMD_BOOTLOC_BUG +@@ -383,6 +424,9 @@ static struct cfi_fixup fixup_table[] = + */ + { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip }, + { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock }, ++#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC ++ { CFI_MFR_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc }, ++#endif + { 0, 0, NULL } + }; + +--- a/drivers/mtd/chips/Kconfig ++++ b/drivers/mtd/chips/Kconfig +@@ -196,6 +196,14 @@ config MTD_CFI_AMDSTD + provides support for one of those command sets, used on chips + including the AMD Am29LV320. + ++config MTD_CFI_FIXUP_MACRONIX_BOOTLOC ++ bool "Fix boot-block location for Macronix flash chips" ++ depends on MTD_CFI_AMDSTD ++ help ++ Some Macronix flash chips have no/wrong boot-block location in the ++ CFI table, and the driver may detect the type incorrectly. Select ++ this if your board has such chip. ++ + config MTD_CFI_STAA + tristate "Support for ST (Advanced Architecture) flash chips" + depends on MTD_GEN_PROBE |