87 lines
3.1 KiB
Diff
87 lines
3.1 KiB
Diff
Index: linux-2.6.21.1/drivers/mtd/chips/cfi_cmdset_0002.c
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===================================================================
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--- linux-2.6.21.1.orig/drivers/mtd/chips/cfi_cmdset_0002.c
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+++ linux-2.6.21.1/drivers/mtd/chips/cfi_cmdset_0002.c
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@@ -47,12 +47,17 @@
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#define MANUFACTURER_AMD 0x0001
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#define MANUFACTURER_ATMEL 0x001F
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#define MANUFACTURER_SST 0x00BF
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+#define MANUFACTURER_MACRONIX 0x00C2
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#define SST49LF004B 0x0060
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#define SST49LF040B 0x0050
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#define SST49LF008A 0x005a
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#define AT49BV6416 0x00d6
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#define MANUFACTURER_SAMSUNG 0x00ec
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+/* Macronix */
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+#define MX29LV160B 0x2249 /* MX29LV160 Bottom-boot chip */
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+#define MX29LV320B 0x22A8 /* MX29LV320 Bottom-boot chip */
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+
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static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
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static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
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static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
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@@ -217,6 +222,35 @@ static void fixup_use_atmel_lock(struct
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mtd->flags |= MTD_STUPID_LOCK;
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}
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+#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
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+/*
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+ * Some Macronix chips has bad bootblock information in the CFI table
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+ */
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+static void fixup_macronix_bootloc(struct mtd_info *mtd, void* param)
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+{
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+ struct map_info *map = mtd->priv;
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+ struct cfi_private *cfi = map->fldrv_priv;
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+ struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
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+ __u8 major = extp->MajorVersion;
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+ __u8 minor = extp->MinorVersion;
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+
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+ switch (cfi->id) {
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+ /* TODO: put affected chip ids here */
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+ case MX29LV160B:
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+ case MX29LV320B:
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+ if (((major << 8) | minor) != 0x3131)
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+ break;
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+
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+ if (extp->TopBottom == 2)
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+ break;
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+
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+ extp->TopBottom = 2; /* Bottom boot */
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+ printk("%s: weird Macronix chip detected, id:0x%04X, boot location "
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+ "forced to bottom\n", map->name, cfi->id);
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+ }
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+}
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+#endif /* CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC */
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+
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static struct cfi_fixup cfi_fixup_table[] = {
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#ifdef AMD_BOOTLOC_BUG
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{ CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
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@@ -231,6 +265,9 @@ static struct cfi_fixup cfi_fixup_table[
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{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
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#endif
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{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
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+#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
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+ { MANUFACTURER_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc, NULL, },
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+#endif
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{ 0, 0, NULL, NULL }
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};
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static struct cfi_fixup jedec_fixup_table[] = {
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Index: linux-2.6.21.1/drivers/mtd/chips/Kconfig
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===================================================================
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--- linux-2.6.21.1.orig/drivers/mtd/chips/Kconfig
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+++ linux-2.6.21.1/drivers/mtd/chips/Kconfig
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@@ -199,6 +199,14 @@ config MTD_CFI_AMDSTD
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provides support for one of those command sets, used on chips
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including the AMD Am29LV320.
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+config MTD_CFI_FIXUP_MACRONIX_BOOTLOC
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+ bool "Force bottom boot for Macronix flash chips"
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+ depends on MTD_CFI_AMDSTD
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+ help
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+ Some Macronix flash chips have wrong boot-block location in the
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+ CFI table, and the driver may detect the type incorrectly. Select
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+ this if your board has such chip.
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+
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config MTD_CFI_STAA
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tristate "Support for ST (Advanced Architecture) flash chips"
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depends on MTD_GEN_PROBE
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