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authorJustin Treon <justin_treon@yahoo.com>2008-01-30 10:25:49 -0800
committerDavid Woodhouse <dwmw2@infradead.org>2008-02-03 18:25:16 +1100
commite619a75ff6201b567a539e787aa9af9bc63a3187 (patch)
treef13113ce617958181d5cd6b2c56ae9f7b87d0014
parent842b1a105c95d22c3e4257879539413d3152629e (diff)
[MTD] Unlocking all Intel flash that is locked on power up.
Patch for unlocking all Intel flash that has instant locking on power up. The patch has been tested on Intel M18, P30 and J3D Strata Flash. 1. The automatic unlocking can be disabled for a particular partition in the map or the command line. a. For the bit mask in the map it should look like: .mask_flags = MTD_POWERUP_LOCK, b. For the command line parsing it should look like: mtdparts=0x80000(bootloader)lk 2. This will only unlock parts with instant individual block locking. Intel parts with legacy unlocking will not be unlocked. Signed-off-by: Justin Treon <justin_treon@yahoo.com> Signed-off-by: Jared Hulbert <jaredeh@gmail.com> Acked-by: Nicolas Pitre <nico@cam.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0001.c18
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c2
-rw-r--r--drivers/mtd/cmdlinepart.c9
-rw-r--r--drivers/mtd/mtdcore.c2
-rw-r--r--include/mtd/mtd-abi.h2
5 files changed, 23 insertions, 10 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 350671ec522..8189adfefae 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -269,10 +269,16 @@ static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
/*
* Some chips power-up with all sectors locked by default.
*/
-static void fixup_use_powerup_lock(struct mtd_info *mtd, void *param)
+static void fixup_unlock_powerup_lock(struct mtd_info *mtd, void *param)
{
- printk(KERN_INFO "Using auto-unlock on power-up/resume\n" );
- mtd->flags |= MTD_STUPID_LOCK;
+ struct map_info *map = mtd->priv;
+ struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
+
+ if (cfip->FeatureSupport&32) {
+ printk(KERN_INFO "Using auto-unlock on power-up/resume\n" );
+ mtd->flags |= MTD_POWERUP_LOCK;
+ }
}
static struct cfi_fixup cfi_fixup_table[] = {
@@ -288,7 +294,7 @@ static struct cfi_fixup cfi_fixup_table[] = {
#endif
{ CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL },
{ CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL },
- { MANUFACTURER_INTEL, 0x891c, fixup_use_powerup_lock, NULL, },
+ { MANUFACTURER_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock, NULL, },
{ 0, 0, NULL, NULL }
};
@@ -2349,7 +2355,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd)
struct flchip *chip;
int ret = 0;
- if ((mtd->flags & MTD_STUPID_LOCK)
+ if ((mtd->flags & MTD_POWERUP_LOCK)
&& extp && (extp->FeatureSupport & (1 << 5)))
cfi_intelext_save_locks(mtd);
@@ -2460,7 +2466,7 @@ static void cfi_intelext_resume(struct mtd_info *mtd)
spin_unlock(chip->mutex);
}
- if ((mtd->flags & MTD_STUPID_LOCK)
+ if ((mtd->flags & MTD_POWERUP_LOCK)
&& extp && (extp->FeatureSupport & (1 << 5)))
cfi_intelext_restore_locks(mtd);
}
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 796bfeadea2..d072e87ce4e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -217,7 +217,7 @@ static void fixup_use_atmel_lock(struct mtd_info *mtd, void *param)
{
mtd->lock = cfi_atmel_lock;
mtd->unlock = cfi_atmel_unlock;
- mtd->flags |= MTD_STUPID_LOCK;
+ mtd->flags |= MTD_POWERUP_LOCK;
}
static struct cfi_fixup cfi_fixup_table[] = {
diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c
index 23fab14f163..b44292abd9f 100644
--- a/drivers/mtd/cmdlinepart.c
+++ b/drivers/mtd/cmdlinepart.c
@@ -9,7 +9,7 @@
*
* mtdparts=<mtddef>[;<mtddef]
* <mtddef> := <mtd-id>:<partdef>[,<partdef>]
- * <partdef> := <size>[@offset][<name>][ro]
+ * <partdef> := <size>[@offset][<name>][ro][lk]
* <mtd-id> := unique name used in mapping driver/device (mtd->name)
* <size> := standard linux memsize OR "-" to denote all remaining space
* <name> := '(' NAME ')'
@@ -143,6 +143,13 @@ static struct mtd_partition * newpart(char *s,
s += 2;
}
+ /* if lk is found do NOT unlock the MTD partition*/
+ if (strncmp(s, "lk", 2) == 0)
+ {
+ mask_flags |= MTD_POWERUP_LOCK;
+ s += 2;
+ }
+
/* test if more partitions are following */
if (*s == ',')
{
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 6c2645e2837..f7e7890e5bc 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -61,7 +61,7 @@ int add_mtd_device(struct mtd_info *mtd)
/* Some chips always power up locked. Unlock them now */
if ((mtd->flags & MTD_WRITEABLE)
- && (mtd->flags & MTD_STUPID_LOCK) && mtd->unlock) {
+ && (mtd->flags & MTD_POWERUP_LOCK) && mtd->unlock) {
if (mtd->unlock(mtd, 0, mtd->size))
printk(KERN_WARNING
"%s: unlock failed, "
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index f71dac42039..615072c4da0 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -29,7 +29,7 @@ struct mtd_oob_buf {
#define MTD_WRITEABLE 0x400 /* Device is writeable */
#define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
#define MTD_NO_ERASE 0x1000 /* No erase necessary */
-#define MTD_STUPID_LOCK 0x2000 /* Always locked after reset */
+#define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */
// Some common devices / combinations of capabilities
#define MTD_CAP_ROM 0