mtd: add lock fixup for AT49BV640D and AT49BV640DT chips
This patch sets the MTD_POWERUP_LOCK flag for AT49BV640D and AT49BV640DT
devices, since the devices are locked when powered up and needs to be unlocked
before interfaced.
Quote datasheet; "At power-up and reset, all sectors have their Softlock
protection mode enabled.".
Tested on AVR32 hardware platform with an AT49BV640D flash device.
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index d923a2d..94be67e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -51,7 +51,9 @@
#define M50LPW080 0x002F
#define M50FLW080A 0x0080
#define M50FLW080B 0x0081
+/* Atmel chips */
#define AT49BV640D 0x02de
+#define AT49BV640DT 0x02db
static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
@@ -199,6 +201,16 @@
cfi->cfiq->BufWriteTimeoutMax = 0;
}
+static void fixup_at49bv640dx_lock(struct mtd_info *mtd, void *param)
+{
+ struct map_info *map = mtd->priv;
+ struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
+
+ cfip->FeatureSupport |= (1 << 5);
+ mtd->flags |= MTD_POWERUP_LOCK;
+}
+
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
/* Some Intel Strata Flash prior to FPO revision C has bugs in this area */
static void fixup_intel_strataflash(struct mtd_info *mtd, void* param)
@@ -283,6 +295,8 @@
static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
+ { CFI_MFR_ATMEL, AT49BV640D, fixup_at49bv640dx_lock, NULL },
+ { CFI_MFR_ATMEL, AT49BV640DT, fixup_at49bv640dx_lock, NULL },
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL },
#endif