mtd: add lock fixup for AT49BV640D and AT49BV640DT chips

[Linux-MTD Mailing List]

Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=8dbaea4bfcecacaf496a3e2ae92867baedbcab8e
Commit:     8dbaea4bfcecacaf496a3e2ae92867baedbcab8e
Parent:     35016dd7e92cf0eb5ae2e811445dd52320c348d0
Author:     Hans-Christian Egtvedt <hans-christian.egtvedt at atmel.com>
AuthorDate: Thu Nov 5 15:53:37 2009 +0100
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Mon Nov 30 09:51:01 2009 +0000

    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 at atmel.com>
    Acked-by: Nicolas Pitre <nico at fluxnic.net>
    Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy at nokia.com>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 drivers/mtd/chips/cfi_cmdset_0001.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

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 @@ static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param)
 	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 void fixup_unlock_powerup_lock(struct mtd_info *mtd, void *param)
 
 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