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Diffstat (limited to 'target/linux/adm5120-2.6/patches/101-cfi-fixup-macronix-bootloc.patch')
-rw-r--r--target/linux/adm5120-2.6/patches/101-cfi-fixup-macronix-bootloc.patch87
1 files changed, 87 insertions, 0 deletions
diff --git a/target/linux/adm5120-2.6/patches/101-cfi-fixup-macronix-bootloc.patch b/target/linux/adm5120-2.6/patches/101-cfi-fixup-macronix-bootloc.patch
new file mode 100644
index 0000000000..58b6dff1f2
--- /dev/null
+++ b/target/linux/adm5120-2.6/patches/101-cfi-fixup-macronix-bootloc.patch
@@ -0,0 +1,87 @@
+Index: linux-2.6.21.1/drivers/mtd/chips/cfi_cmdset_0002.c
+===================================================================
+--- linux-2.6.21.1.orig/drivers/mtd/chips/cfi_cmdset_0002.c
++++ linux-2.6.21.1/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -47,12 +47,17 @@
+ #define MANUFACTURER_AMD 0x0001
+ #define MANUFACTURER_ATMEL 0x001F
+ #define MANUFACTURER_SST 0x00BF
++#define MANUFACTURER_MACRONIX 0x00C2
+ #define SST49LF004B 0x0060
+ #define SST49LF040B 0x0050
+ #define SST49LF008A 0x005a
+ #define AT49BV6416 0x00d6
+ #define MANUFACTURER_SAMSUNG 0x00ec
+
++/* Macronix */
++#define MX29LV160B 0x2249 /* MX29LV160 Bottom-boot chip */
++#define MX29LV320B 0x22A8 /* MX29LV320 Bottom-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 *);
+@@ -217,6 +222,35 @@ static void fixup_use_atmel_lock(struct
+ mtd->flags |= MTD_STUPID_LOCK;
+ }
+
++#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
++/*
++ * Some Macronix chips has bad bootblock information in the CFI table
++ */
++static void fixup_macronix_bootloc(struct mtd_info *mtd, void* param)
++{
++ struct map_info *map = mtd->priv;
++ struct cfi_private *cfi = map->fldrv_priv;
++ struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
++ __u8 major = extp->MajorVersion;
++ __u8 minor = extp->MinorVersion;
++
++ switch (cfi->id) {
++ /* TODO: put affected chip ids here */
++ case MX29LV160B:
++ case MX29LV320B:
++ if (((major << 8) | minor) != 0x3131)
++ break;
++
++ if (extp->TopBottom == 2)
++ break;
++
++ extp->TopBottom = 2; /* Bottom boot */
++ printk("%s: weird Macronix chip detected, id:0x%04X, boot location "
++ "forced to bottom\n", map->name, cfi->id);
++ }
++}
++#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */
++
+ static struct cfi_fixup cfi_fixup_table[] = {
+ #ifdef AMD_BOOTLOC_BUG
+ { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
+@@ -231,6 +265,9 @@ static struct cfi_fixup cfi_fixup_table[
+ { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
+ #endif
+ { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
++#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
++ { MANUFACTURER_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc, NULL, },
++#endif
+ { 0, 0, NULL, NULL }
+ };
+ static struct cfi_fixup jedec_fixup_table[] = {
+Index: linux-2.6.21.1/drivers/mtd/chips/Kconfig
+===================================================================
+--- linux-2.6.21.1.orig/drivers/mtd/chips/Kconfig
++++ linux-2.6.21.1/drivers/mtd/chips/Kconfig
+@@ -199,6 +199,14 @@ 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 "Force bottom boot for Macronix flash chips"
++ depends on MTD_CFI_AMDSTD
++ help
++ Some Macronix flash chips have 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