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mtd: add lock fixup for AT49BV640D and AT49BV640DT chips

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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>
This commit is contained in:
Hans-Christian Egtvedt 2009-11-05 15:53:37 +01:00 committed by David Woodhouse
parent 35016dd7e9
commit 8dbaea4bfc
1 changed files with 14 additions and 0 deletions
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14
drivers/mtd/chips/cfi_cmdset_0001.c
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@ -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