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-rw-r--r--drivers/mtd/chips/Kconfig12
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0001.c93
-rw-r--r--drivers/mtd/chips/fwh_lock.h3
3 files changed, 95 insertions, 13 deletions
diff --git a/drivers/mtd/chips/Kconfig b/drivers/mtd/chips/Kconfig
index 72e6d73beb4..d28e0fc85e1 100644
--- a/drivers/mtd/chips/Kconfig
+++ b/drivers/mtd/chips/Kconfig
@@ -6,7 +6,6 @@ menu "RAM/ROM/Flash chip drivers"
config MTD_CFI
tristate "Detect flash chips by Common Flash Interface (CFI) probe"
- depends on MTD
select MTD_GEN_PROBE
help
The Common Flash Interface specification was developed by Intel,
@@ -18,7 +17,6 @@ config MTD_CFI
config MTD_JEDECPROBE
tristate "Detect non-CFI AMD/JEDEC-compatible flash chips"
- depends on MTD
select MTD_GEN_PROBE
help
This option enables JEDEC-style probing of flash chips which are not
@@ -213,21 +211,18 @@ config MTD_CFI_UTIL
config MTD_RAM
tristate "Support for RAM chips in bus mapping"
- depends on MTD
help
This option enables basic support for RAM chips accessed through
a bus mapping driver.
config MTD_ROM
tristate "Support for ROM chips in bus mapping"
- depends on MTD
help
This option enables basic support for ROM chips accessed through
a bus mapping driver.
config MTD_ABSENT
tristate "Support for absent chips in bus mapping"
- depends on MTD
help
This option enables support for a dummy probing driver used to
allocated placeholder MTD devices on systems that have socketed
@@ -237,7 +232,6 @@ config MTD_ABSENT
with this driver will return -ENODEV upon access.
config MTD_OBSOLETE_CHIPS
- depends on MTD
bool "Older (theoretically obsoleted now) drivers for non-CFI chips"
help
This option does not enable any code directly, but will allow you to
@@ -250,7 +244,7 @@ config MTD_OBSOLETE_CHIPS
config MTD_AMDSTD
tristate "AMD compatible flash chip support (non-CFI)"
- depends on MTD && MTD_OBSOLETE_CHIPS && BROKEN
+ depends on MTD_OBSOLETE_CHIPS && BROKEN
help
This option enables support for flash chips using AMD-compatible
commands, including some which are not CFI-compatible and hence
@@ -260,7 +254,7 @@ config MTD_AMDSTD
config MTD_SHARP
tristate "pre-CFI Sharp chip support"
- depends on MTD && MTD_OBSOLETE_CHIPS
+ depends on MTD_OBSOLETE_CHIPS
help
This option enables support for flash chips using Sharp-compatible
commands, including some which are not CFI-compatible and hence
@@ -268,7 +262,7 @@ config MTD_SHARP
config MTD_JEDEC
tristate "JEDEC device support"
- depends on MTD && MTD_OBSOLETE_CHIPS && BROKEN
+ depends on MTD_OBSOLETE_CHIPS && BROKEN
help
Enable older JEDEC flash interface devices for self
programming flash. It is commonly used in older AMD chips. It is
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index f334959a335..2f19fa78d24 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -15,6 +15,8 @@
* - optimized write buffer method
* 02/05/2002 Christopher Hoover <ch@hpl.hp.com>/<ch@murgatroid.com>
* - reworked lock/unlock/erase support for var size flash
+ * 21/03/2007 Rodolfo Giometti <giometti@linux.it>
+ * - auto unlock sectors on resume for auto locking flash on power up
*/
#include <linux/module.h>
@@ -30,6 +32,7 @@
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
+#include <linux/bitmap.h>
#include <linux/mtd/xip.h>
#include <linux/mtd/map.h>
#include <linux/mtd/mtd.h>
@@ -220,6 +223,15 @@ 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)
+{
+ printk(KERN_INFO "Using auto-unlock on power-up/resume\n" );
+ mtd->flags |= MTD_STUPID_LOCK;
+}
+
static struct cfi_fixup cfi_fixup_table[] = {
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL },
@@ -232,6 +244,7 @@ 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, },
{ 0, 0, NULL, NULL }
};
@@ -460,6 +473,7 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd)
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset;
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize;
mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum;
+ mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1, GFP_KERNEL);
}
offset += (ersize * ernum);
}
@@ -1825,8 +1839,7 @@ static void cfi_intelext_sync (struct mtd_info *mtd)
}
}
-#ifdef DEBUG_LOCK_BITS
-static int __xipram do_printlockstatus_oneblock(struct map_info *map,
+static int __xipram do_getlockstatus_oneblock(struct map_info *map,
struct flchip *chip,
unsigned long adr,
int len, void *thunk)
@@ -1840,8 +1853,17 @@ static int __xipram do_printlockstatus_oneblock(struct map_info *map,
chip->state = FL_JEDEC_QUERY;
status = cfi_read_query(map, adr+(2*ofs_factor));
xip_enable(map, chip, 0);
+ return status;
+}
+
+#ifdef DEBUG_LOCK_BITS
+static int __xipram do_printlockstatus_oneblock(struct map_info *map,
+ struct flchip *chip,
+ unsigned long adr,
+ int len, void *thunk)
+{
printk(KERN_DEBUG "block status register for 0x%08lx is %x\n",
- adr, status);
+ adr, do_getlockstatus_oneblock(map, chip, adr, len, thunk));
return 0;
}
#endif
@@ -2216,14 +2238,45 @@ static int cfi_intelext_get_user_prot_info(struct mtd_info *mtd,
#endif
+static void cfi_intelext_save_locks(struct mtd_info *mtd)
+{
+ struct mtd_erase_region_info *region;
+ int block, status, i;
+ unsigned long adr;
+ size_t len;
+
+ for (i = 0; i < mtd->numeraseregions; i++) {
+ region = &mtd->eraseregions[i];
+ if (!region->lockmap)
+ continue;
+
+ for (block = 0; block < region->numblocks; block++){
+ len = region->erasesize;
+ adr = region->offset + block * len;
+
+ status = cfi_varsize_frob(mtd,
+ do_getlockstatus_oneblock, adr, len, 0);
+ if (status)
+ set_bit(block, region->lockmap);
+ else
+ clear_bit(block, region->lockmap);
+ }
+ }
+}
+
static int cfi_intelext_suspend(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_intelext *extp = cfi->cmdset_priv;
int i;
struct flchip *chip;
int ret = 0;
+ if ((mtd->flags & MTD_STUPID_LOCK)
+ && extp && (extp->FeatureSupport & (1 << 5)))
+ cfi_intelext_save_locks(mtd);
+
for (i=0; !ret && i<cfi->numchips; i++) {
chip = &cfi->chips[i];
@@ -2285,10 +2338,33 @@ static int cfi_intelext_suspend(struct mtd_info *mtd)
return ret;
}
+static void cfi_intelext_restore_locks(struct mtd_info *mtd)
+{
+ struct mtd_erase_region_info *region;
+ int block, i;
+ unsigned long adr;
+ size_t len;
+
+ for (i = 0; i < mtd->numeraseregions; i++) {
+ region = &mtd->eraseregions[i];
+ if (!region->lockmap)
+ continue;
+
+ for (block = 0; block < region->numblocks; block++) {
+ len = region->erasesize;
+ adr = region->offset + block * len;
+
+ if (!test_bit(block, region->lockmap))
+ cfi_intelext_unlock(mtd, adr, len);
+ }
+ }
+}
+
static void cfi_intelext_resume(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_intelext *extp = cfi->cmdset_priv;
int i;
struct flchip *chip;
@@ -2307,6 +2383,10 @@ static void cfi_intelext_resume(struct mtd_info *mtd)
spin_unlock(chip->mutex);
}
+
+ if ((mtd->flags & MTD_STUPID_LOCK)
+ && extp && (extp->FeatureSupport & (1 << 5)))
+ cfi_intelext_restore_locks(mtd);
}
static int cfi_intelext_reset(struct mtd_info *mtd)
@@ -2347,12 +2427,19 @@ static void cfi_intelext_destroy(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
+ struct mtd_erase_region_info *region;
+ int i;
cfi_intelext_reset(mtd);
unregister_reboot_notifier(&mtd->reboot_notifier);
kfree(cfi->cmdset_priv);
kfree(cfi->cfiq);
kfree(cfi->chips[0].priv);
kfree(cfi);
+ for (i = 0; i < mtd->numeraseregions; i++) {
+ region = &mtd->eraseregions[i];
+ if (region->lockmap)
+ kfree(region->lockmap);
+ }
kfree(mtd->eraseregions);
}
diff --git a/drivers/mtd/chips/fwh_lock.h b/drivers/mtd/chips/fwh_lock.h
index 77303ce5dcf..ab44f2b996f 100644
--- a/drivers/mtd/chips/fwh_lock.h
+++ b/drivers/mtd/chips/fwh_lock.h
@@ -65,11 +65,12 @@ static int fwh_xxlock_oneblock(struct map_info *map, struct flchip *chip,
return ret;
}
+ chip->oldstate = chip->state;
chip->state = xxlt->state;
map_write(map, CMD(xxlt->val), adr);
/* Done and happy. */
- chip->state = FL_READY;
+ chip->state = chip->oldstate;
put_chip(map, chip, adr);
spin_unlock(chip->mutex);
return 0;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-13 12:12:14 +0000