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Commit 8dbaea4b authored by Hans-Christian Egtvedt's avatar Hans-Christian Egtvedt Committed by David Woodhouse
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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: default avatarHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: default avatarNicolas Pitre <nico@fluxnic.net>
Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 35016dd7

drivers/mtd/chips/cfi_cmdset_0001.c

+14 −0
Original line number Diff line number Diff line
@@ -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