85 lines
2.7 KiB
Diff
85 lines
2.7 KiB
Diff
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
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+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
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@@ -49,6 +49,12 @@
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#define SST49LF008A 0x005a
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#define AT49BV6416 0x00d6
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+/* Macronix */
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+#define MX29LV160B 0x2249 /* MX29LV160 Bottom-boot chip */
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+#define MX29LV160T 0x22C4 /* MX29LV160 Top-boot chip */
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+#define MX29LV320B 0x22A8 /* MX29LV320 Bottom-boot chip */
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+#define MX29LV320T 0x22A7 /* MX29LV320 Top-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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@@ -374,6 +380,41 @@ static struct cfi_fixup cfi_nopri_fixup_
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{ 0, 0, NULL }
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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 no/bad bootblock information in the CFI table
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+ */
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+static void fixup_macronix_bootloc(struct mtd_info *mtd)
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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 t;
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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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+ t = 2; /* Bottom boot */
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+ break;
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+ case MX29LV160T:
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+ case MX29LV320T:
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+ t = 3; /* Top boot */
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+ break;
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+ default:
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+ return;
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+ }
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+
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+ if (extp->TopBottom == t)
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+ /* boot location detected by the CFI layer is correct */
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+ return;
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+
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+ extp->TopBottom = t;
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+ printk("%s: Macronix chip detected, id:0x%04X, boot location forced "
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+ "to %s\n", map->name, cfi->id, (t == 2) ? "bottom" : "top");
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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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{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri },
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#ifdef AMD_BOOTLOC_BUG
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@@ -416,6 +457,9 @@ static struct cfi_fixup fixup_table[] =
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*/
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{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip },
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{ CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock },
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+#ifdef CONFIG_MTD_CFI_FIXUP_MACRONIX_BOOTLOC
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+ { CFI_MFR_MACRONIX, CFI_ID_ANY, fixup_macronix_bootloc },
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+#endif
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{ 0, 0, NULL }
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};
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--- a/drivers/mtd/chips/Kconfig
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+++ b/drivers/mtd/chips/Kconfig
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@@ -188,6 +188,14 @@ config MTD_CFI_AMDSTD
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provides support for command set 0002, used on chips including
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the AMD Am29LV320.
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+config MTD_CFI_FIXUP_MACRONIX_BOOTLOC
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+ bool "Fix boot-block location 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 no/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 CFI command set 0020 (ST (Advanced Architecture) chips)"
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depends on MTD_GEN_PROBE
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