Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

17 files changed, 11945 insertions, 0 deletions

diff --git a/drivers/mtd/chips/Kconfig b/drivers/mtd/chips/Kconfig
new file mode 100644
index 000000000000..d682dbc8157e
--- /dev/null
+++ b/drivers/mtd/chips/Kconfig
@@ -0,0 +1,286 @@
+# drivers/mtd/chips/Kconfig
+# $Id: Kconfig,v 1.13 2004/12/01 15:49:10 nico Exp $
+
+menu "RAM/ROM/Flash chip drivers"
+	depends on MTD!=n
+
+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,
+	  AMD and other flash manufactures that provides a universal method
+	  for probing the capabilities of flash devices. If you wish to
+	  support any device that is CFI-compliant, you need to enable this
+	  option. Visit <http://www.amd.com/products/nvd/overview/cfi.html>
+	  for more information on 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
+	  compatible with the Common Flash Interface, but will use the common
+	  CFI-targetted flash drivers for any chips which are identified which
+	  are in fact compatible in all but the probe method. This actually
+	  covers most AMD/Fujitsu-compatible chips, and will shortly cover also
+	  non-CFI Intel chips (that code is in MTD CVS and should shortly be sent
+	  for inclusion in Linus' tree)
+
+config MTD_GEN_PROBE
+	tristate
+
+config MTD_CFI_ADV_OPTIONS
+	bool "Flash chip driver advanced configuration options"
+	depends on MTD_GEN_PROBE
+	help
+	  If you need to specify a specific endianness for access to flash
+	  chips, or if you wish to reduce the size of the kernel by including
+	  support for only specific arrangements of flash chips, say 'Y'. This
+	  option does not directly affect the code, but will enable other 
+	  configuration options which allow you to do so.
+
+	  If unsure, say 'N'.
+
+choice
+	prompt "Flash cmd/query data swapping"
+	depends on MTD_CFI_ADV_OPTIONS
+	default MTD_CFI_NOSWAP
+
+config MTD_CFI_NOSWAP
+	bool "NO"
+	---help---
+	  This option defines the way in which the CPU attempts to arrange
+	  data bits when writing the 'magic' commands to the chips. Saying
+	  'NO', which is the default when CONFIG_MTD_CFI_ADV_OPTIONS isn't
+	  enabled, means that the CPU will not do any swapping; the chips
+	  are expected to be wired to the CPU in 'host-endian' form. 
+	  Specific arrangements are possible with the BIG_ENDIAN_BYTE and
+	  LITTLE_ENDIAN_BYTE, if the bytes are reversed.
+
+	  If you have a LART, on which the data (and address) lines were
+	  connected in a fashion which ensured that the nets were as short
+	  as possible, resulting in a bit-shuffling which seems utterly
+	  random to the untrained eye, you need the LART_ENDIAN_BYTE option.
+
+	  Yes, there really exists something sicker than PDP-endian :)
+
+config MTD_CFI_BE_BYTE_SWAP
+	bool "BIG_ENDIAN_BYTE"
+
+config MTD_CFI_LE_BYTE_SWAP
+	bool "LITTLE_ENDIAN_BYTE"
+
+endchoice
+
+config MTD_CFI_GEOMETRY
+	bool "Specific CFI Flash geometry selection"
+	depends on MTD_CFI_ADV_OPTIONS
+	help
+	  This option does not affect the code directly, but will enable 
+	  some other configuration options which would allow you to reduce
+	  the size of the kernel by including support for only certain 
+	  arrangements of CFI chips. If unsure, say 'N' and all options 
+	  which are supported by the current code will be enabled.
+
+config MTD_MAP_BANK_WIDTH_1
+	bool "Support  8-bit buswidth" if MTD_CFI_GEOMETRY
+	default y
+	help
+	  If you wish to support CFI devices on a physical bus which is
+	  8 bits wide, say 'Y'.
+
+config MTD_MAP_BANK_WIDTH_2
+	bool "Support 16-bit buswidth" if MTD_CFI_GEOMETRY
+	default y
+	help
+	  If you wish to support CFI devices on a physical bus which is
+	  16 bits wide, say 'Y'.
+
+config MTD_MAP_BANK_WIDTH_4
+	bool "Support 32-bit buswidth" if MTD_CFI_GEOMETRY
+	default y
+	help
+	  If you wish to support CFI devices on a physical bus which is
+	  32 bits wide, say 'Y'.
+
+config MTD_MAP_BANK_WIDTH_8
+	bool "Support 64-bit buswidth" if MTD_CFI_GEOMETRY
+	default n
+	help
+	  If you wish to support CFI devices on a physical bus which is
+	  64 bits wide, say 'Y'.
+
+config MTD_MAP_BANK_WIDTH_16
+	bool "Support 128-bit buswidth" if MTD_CFI_GEOMETRY
+	default n
+	help
+	  If you wish to support CFI devices on a physical bus which is
+	  128 bits wide, say 'Y'.
+
+config MTD_MAP_BANK_WIDTH_32
+	bool "Support 256-bit buswidth" if MTD_CFI_GEOMETRY
+	default n
+	help
+	  If you wish to support CFI devices on a physical bus which is
+	  256 bits wide, say 'Y'.
+
+config MTD_CFI_I1
+	bool "Support 1-chip flash interleave" if MTD_CFI_GEOMETRY
+	default y
+	help
+	  If your flash chips are not interleaved - i.e. you only have one
+	  flash chip addressed by each bus cycle, then say 'Y'.
+
+config MTD_CFI_I2
+	bool "Support 2-chip flash interleave" if MTD_CFI_GEOMETRY
+	default y
+	help
+	  If your flash chips are interleaved in pairs - i.e. you have two
+	  flash chips addressed by each bus cycle, then say 'Y'.
+
+config MTD_CFI_I4
+	bool "Support 4-chip flash interleave" if MTD_CFI_GEOMETRY
+	default n
+	help
+	  If your flash chips are interleaved in fours - i.e. you have four
+	  flash chips addressed by each bus cycle, then say 'Y'.
+
+config MTD_CFI_I8
+	bool "Support 8-chip flash interleave" if MTD_CFI_GEOMETRY
+	default n
+	help
+	  If your flash chips are interleaved in eights - i.e. you have eight
+	  flash chips addressed by each bus cycle, then say 'Y'.
+
+config MTD_CFI_INTELEXT
+	tristate "Support for Intel/Sharp flash chips"
+	depends on MTD_GEN_PROBE
+	select MTD_CFI_UTIL
+	help
+	  The Common Flash Interface defines a number of different command
+	  sets which a CFI-compliant chip may claim to implement. This code
+	  provides support for one of those command sets, used on Intel
+	  StrataFlash and other parts.
+
+config MTD_CFI_AMDSTD
+	tristate "Support for AMD/Fujitsu flash chips"
+	depends on MTD_GEN_PROBE
+	select MTD_CFI_UTIL
+	help
+	  The Common Flash Interface defines a number of different command
+	  sets which a CFI-compliant chip may claim to implement. This code
+	  provides support for one of those command sets, used on chips 
+	  including the AMD Am29LV320.
+
+config MTD_CFI_AMDSTD_RETRY
+	int "Retry failed commands (erase/program)"
+	depends on MTD_CFI_AMDSTD
+	default "0"
+	help
+	  Some chips, when attached to a shared bus, don't properly filter
+	  bus traffic that is destined to other devices.  This broken
+	  behavior causes erase and program sequences to be aborted when
+	  the sequences are mixed with traffic for other devices.
+
+	  SST49LF040 (and related) chips are know to be broken.
+
+config MTD_CFI_AMDSTD_RETRY_MAX
+	int "Max retries of failed commands (erase/program)"
+	depends on MTD_CFI_AMDSTD_RETRY
+	default "0"
+	help
+	  If you have an SST49LF040 (or related chip) then this value should
+	  be set to at least 1.  This can also be adjusted at driver load
+	  time with the retry_cmd_max module parameter.
+
+config MTD_CFI_STAA
+	tristate "Support for ST (Advanced Architecture) flash chips"
+	depends on MTD_GEN_PROBE
+	select MTD_CFI_UTIL
+	help
+	  The Common Flash Interface defines a number of different command
+	  sets which a CFI-compliant chip may claim to implement. This code
+	  provides support for one of those command sets.
+
+config MTD_CFI_UTIL
+	tristate
+
+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
+	  or removable media.  Use of this driver as a fallback chip probe
+	  preserves the expected registration order of MTD device nodes on
+	  the system regardless of media presence.  Device nodes created
+	  with this driver will return -ENODEV upon access.
+
+config MTD_OBSOLETE_CHIPS
+	depends on MTD && BROKEN
+	bool "Older (theoretically obsoleted now) drivers for non-CFI chips"
+	help
+	  This option does not enable any code directly, but will allow you to
+	  select some other chip drivers which are now considered obsolete,
+	  because the generic CONFIG_JEDECPROBE code above should now detect
+	  the chips which are supported by these drivers, and allow the generic
+	  CFI-compatible drivers to drive the chips. Say 'N' here unless you have
+	  already tried the CONFIG_JEDECPROBE method and reported its failure
+	  to the MTD mailing list at <linux-mtd@lists.infradead.org>
+
+config MTD_AMDSTD
+	tristate "AMD compatible flash chip support (non-CFI)"
+	depends on MTD && MTD_OBSOLETE_CHIPS
+	help
+	  This option enables support for flash chips using AMD-compatible
+	  commands, including some which are not CFI-compatible and hence 
+	  cannot be used with the CONFIG_MTD_CFI_AMDSTD option.
+
+	  It also works on AMD compatible chips that do conform to CFI.
+
+config MTD_SHARP
+	tristate "pre-CFI Sharp chip support"
+	depends on MTD && MTD_OBSOLETE_CHIPS
+	help
+	  This option enables support for flash chips using Sharp-compatible
+	  commands, including some which are not CFI-compatible and hence 
+	  cannot be used with the CONFIG_MTD_CFI_INTELxxx options.
+
+config MTD_JEDEC
+	tristate "JEDEC device support"
+	depends on MTD && MTD_OBSOLETE_CHIPS
+	help
+	  Enable older older JEDEC flash interface devices for self
+	  programming flash.  It is commonly used in older AMD chips.  It is
+	  only called JEDEC because the JEDEC association
+	  <http://www.jedec.org/> distributes the identification codes for the
+	  chips.
+
+config MTD_XIP
+	bool "XIP aware MTD support"
+	depends on !SMP && MTD_CFI_INTELEXT && EXPERIMENTAL
+	default y if XIP_KERNEL
+	help
+	  This allows MTD support to work with flash memory which is also
+	  used for XIP purposes.  If you're not sure what this is all about
+	  then say N.
+
+endmenu
+
diff --git a/drivers/mtd/chips/Makefile b/drivers/mtd/chips/Makefile
new file mode 100644
index 000000000000..6830489828c6
--- /dev/null
+++ b/drivers/mtd/chips/Makefile
@@ -0,0 +1,26 @@
+#
+# linux/drivers/chips/Makefile
+#
+# $Id: Makefile.common,v 1.4 2004/07/12 16:07:30 dwmw2 Exp $
+
+#                       *** BIG UGLY NOTE ***
+#
+# The removal of get_module_symbol() and replacement with
+# inter_module_register() et al has introduced a link order dependency
+# here where previously there was none.  We now have to ensure that
+# the CFI command set drivers are linked before gen_probe.o
+
+obj-$(CONFIG_MTD)		+= chipreg.o
+obj-$(CONFIG_MTD_AMDSTD)	+= amd_flash.o 
+obj-$(CONFIG_MTD_CFI)		+= cfi_probe.o
+obj-$(CONFIG_MTD_CFI_UTIL)	+= cfi_util.o
+obj-$(CONFIG_MTD_CFI_STAA)	+= cfi_cmdset_0020.o
+obj-$(CONFIG_MTD_CFI_AMDSTD)	+= cfi_cmdset_0002.o
+obj-$(CONFIG_MTD_CFI_INTELEXT)	+= cfi_cmdset_0001.o
+obj-$(CONFIG_MTD_GEN_PROBE)	+= gen_probe.o
+obj-$(CONFIG_MTD_JEDEC)		+= jedec.o
+obj-$(CONFIG_MTD_JEDECPROBE)	+= jedec_probe.o
+obj-$(CONFIG_MTD_RAM)		+= map_ram.o
+obj-$(CONFIG_MTD_ROM)		+= map_rom.o
+obj-$(CONFIG_MTD_SHARP)		+= sharp.o
+obj-$(CONFIG_MTD_ABSENT)	+= map_absent.o
diff --git a/drivers/mtd/chips/amd_flash.c b/drivers/mtd/chips/amd_flash.c
new file mode 100644
index 000000000000..41e2e3e31603
--- /dev/null
+++ b/drivers/mtd/chips/amd_flash.c
@@ -0,0 +1,1415 @@
+/*
+ * MTD map driver for AMD compatible flash chips (non-CFI)
+ *
+ * Author: Jonas Holmberg <jonas.holmberg@axis.com>
+ *
+ * $Id: amd_flash.c,v 1.26 2004/11/20 12:49:04 dwmw2 Exp $
+ *
+ * Copyright (c) 2001 Axis Communications AB
+ *
+ * This file is under GPL.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/flashchip.h>
+
+/* There's no limit. It exists only to avoid realloc. */
+#define MAX_AMD_CHIPS 8
+
+#define DEVICE_TYPE_X8	(8 / 8)
+#define DEVICE_TYPE_X16	(16 / 8)
+#define DEVICE_TYPE_X32	(32 / 8)
+
+/* Addresses */
+#define ADDR_MANUFACTURER		0x0000
+#define ADDR_DEVICE_ID			0x0001
+#define ADDR_SECTOR_LOCK		0x0002
+#define ADDR_HANDSHAKE			0x0003
+#define ADDR_UNLOCK_1			0x0555
+#define ADDR_UNLOCK_2			0x02AA
+
+/* Commands */
+#define CMD_UNLOCK_DATA_1		0x00AA
+#define CMD_UNLOCK_DATA_2		0x0055
+#define CMD_MANUFACTURER_UNLOCK_DATA	0x0090
+#define CMD_UNLOCK_BYPASS_MODE		0x0020
+#define CMD_PROGRAM_UNLOCK_DATA		0x00A0
+#define CMD_RESET_DATA			0x00F0
+#define CMD_SECTOR_ERASE_UNLOCK_DATA	0x0080
+#define CMD_SECTOR_ERASE_UNLOCK_DATA_2	0x0030
+
+#define CMD_UNLOCK_SECTOR		0x0060
+
+/* Manufacturers */
+#define MANUFACTURER_AMD	0x0001
+#define MANUFACTURER_ATMEL	0x001F
+#define MANUFACTURER_FUJITSU	0x0004
+#define MANUFACTURER_ST		0x0020
+#define MANUFACTURER_SST	0x00BF
+#define MANUFACTURER_TOSHIBA	0x0098
+
+/* AMD */
+#define AM29F800BB	0x2258
+#define AM29F800BT	0x22D6
+#define AM29LV800BB	0x225B
+#define AM29LV800BT	0x22DA
+#define AM29LV160DT	0x22C4
+#define AM29LV160DB	0x2249
+#define AM29BDS323D     0x22D1
+#define AM29BDS643D	0x227E
+
+/* Atmel */
+#define AT49xV16x	0x00C0
+#define AT49xV16xT	0x00C2
+
+/* Fujitsu */
+#define MBM29LV160TE	0x22C4
+#define MBM29LV160BE	0x2249
+#define MBM29LV800BB	0x225B
+
+/* ST - www.st.com */
+#define M29W800T	0x00D7
+#define M29W160DT	0x22C4
+#define M29W160DB	0x2249
+
+/* SST */
+#define SST39LF800	0x2781
+#define SST39LF160	0x2782
+
+/* Toshiba */
+#define TC58FVT160	0x00C2
+#define TC58FVB160	0x0043
+
+#define D6_MASK	0x40
+
+struct amd_flash_private {
+	int device_type;	
+	int interleave;	
+	int numchips;	
+	unsigned long chipshift;
+//	const char *im_name;
+	struct flchip chips[0];
+};
+
+struct amd_flash_info {
+	const __u16 mfr_id;
+	const __u16 dev_id;
+	const char *name;
+	const u_long size;
+	const int numeraseregions;
+	const struct mtd_erase_region_info regions[4];
+};
+
+
+
+static int amd_flash_read(struct mtd_info *, loff_t, size_t, size_t *,
+			  u_char *);
+static int amd_flash_write(struct mtd_info *, loff_t, size_t, size_t *,
+			   const u_char *);
+static int amd_flash_erase(struct mtd_info *, struct erase_info *);
+static void amd_flash_sync(struct mtd_info *);
+static int amd_flash_suspend(struct mtd_info *);
+static void amd_flash_resume(struct mtd_info *);
+static void amd_flash_destroy(struct mtd_info *);
+static struct mtd_info *amd_flash_probe(struct map_info *map);
+
+
+static struct mtd_chip_driver amd_flash_chipdrv = {
+	.probe = amd_flash_probe,
+	.destroy = amd_flash_destroy,
+	.name = "amd_flash",
+	.module = THIS_MODULE
+};
+
+
+
+static const char im_name[] = "amd_flash";
+
+
+
+static inline __u32 wide_read(struct map_info *map, __u32 addr)
+{
+	if (map->buswidth == 1) {
+		return map_read8(map, addr);
+	} else if (map->buswidth == 2) {
+		return map_read16(map, addr);
+	} else if (map->buswidth == 4) {
+		return map_read32(map, addr);
+        }
+
+	return 0;
+}
+
+static inline void wide_write(struct map_info *map, __u32 val, __u32 addr)
+{
+	if (map->buswidth == 1) {
+		map_write8(map, val, addr);
+	} else if (map->buswidth == 2) {
+		map_write16(map, val, addr);
+	} else if (map->buswidth == 4) {
+		map_write32(map, val, addr);
+	}
+}
+
+static inline __u32 make_cmd(struct map_info *map, __u32 cmd)
+{
+	const struct amd_flash_private *private = map->fldrv_priv;
+	if ((private->interleave == 2) &&
+	    (private->device_type == DEVICE_TYPE_X16)) {
+		cmd |= (cmd << 16);
+	}
+
+	return cmd;
+}
+
+static inline void send_unlock(struct map_info *map, unsigned long base)
+{
+	wide_write(map, (CMD_UNLOCK_DATA_1 << 16) | CMD_UNLOCK_DATA_1,
+		   base + (map->buswidth * ADDR_UNLOCK_1));
+	wide_write(map, (CMD_UNLOCK_DATA_2 << 16) | CMD_UNLOCK_DATA_2,
+		   base + (map->buswidth * ADDR_UNLOCK_2));
+}
+
+static inline void send_cmd(struct map_info *map, unsigned long base, __u32 cmd)
+{
+	send_unlock(map, base);
+	wide_write(map, make_cmd(map, cmd),
+		   base + (map->buswidth * ADDR_UNLOCK_1));
+}
+
+static inline void send_cmd_to_addr(struct map_info *map, unsigned long base,
+				    __u32 cmd, unsigned long addr)
+{
+	send_unlock(map, base);
+	wide_write(map, make_cmd(map, cmd), addr);
+}
+
+static inline int flash_is_busy(struct map_info *map, unsigned long addr,
+				int interleave)
+{
+
+	if ((interleave == 2) && (map->buswidth == 4)) {
+		__u32 read1, read2;
+
+		read1 = wide_read(map, addr);
+		read2 = wide_read(map, addr);
+
+		return (((read1 >> 16) & D6_MASK) !=
+			((read2 >> 16) & D6_MASK)) ||
+		       (((read1 & 0xffff) & D6_MASK) !=
+			((read2 & 0xffff) & D6_MASK));
+	}
+
+	return ((wide_read(map, addr) & D6_MASK) !=
+		(wide_read(map, addr) & D6_MASK));
+}
+
+static inline void unlock_sector(struct map_info *map, unsigned long sect_addr,
+				 int unlock)
+{
+	/* Sector lock address. A6 = 1 for unlock, A6 = 0 for lock */
+	int SLA = unlock ?
+		(sect_addr |  (0x40 * map->buswidth)) :
+		(sect_addr & ~(0x40 * map->buswidth)) ;
+
+	__u32 cmd = make_cmd(map, CMD_UNLOCK_SECTOR);
+
+	wide_write(map, make_cmd(map, CMD_RESET_DATA), 0);
+	wide_write(map, cmd, SLA); /* 1st cycle: write cmd to any address */
+	wide_write(map, cmd, SLA); /* 2nd cycle: write cmd to any address */
+	wide_write(map, cmd, SLA); /* 3rd cycle: write cmd to SLA */
+}
+
+static inline int is_sector_locked(struct map_info *map,
+				   unsigned long sect_addr)
+{
+	int status;
+
+	wide_write(map, CMD_RESET_DATA, 0);
+	send_cmd(map, sect_addr, CMD_MANUFACTURER_UNLOCK_DATA);
+
+	/* status is 0x0000 for unlocked and 0x0001 for locked */
+	status = wide_read(map, sect_addr + (map->buswidth * ADDR_SECTOR_LOCK));
+	wide_write(map, CMD_RESET_DATA, 0);
+	return status;
+}
+
+static int amd_flash_do_unlock(struct mtd_info *mtd, loff_t ofs, size_t len,
+			       int is_unlock)
+{
+	struct map_info *map;
+	struct mtd_erase_region_info *merip;
+	int eraseoffset, erasesize, eraseblocks;
+	int i;
+	int retval = 0;
+	int lock_status;
+      
+	map = mtd->priv;
+
+	/* Pass the whole chip through sector by sector and check for each
+	   sector if the sector and the given interval overlap */
+	for(i = 0; i < mtd->numeraseregions; i++) {
+		merip = &mtd->eraseregions[i];
+
+		eraseoffset = merip->offset;
+		erasesize = merip->erasesize;
+		eraseblocks = merip->numblocks;
+
+		if (ofs > eraseoffset + erasesize)
+			continue;
+
+		while (eraseblocks > 0) {
+			if (ofs < eraseoffset + erasesize && ofs + len > eraseoffset) {
+				unlock_sector(map, eraseoffset, is_unlock);
+
+				lock_status = is_sector_locked(map, eraseoffset);
+				
+				if (is_unlock && lock_status) {
+					printk("Cannot unlock sector at address %x length %xx\n",
+					       eraseoffset, merip->erasesize);
+					retval = -1;
+				} else if (!is_unlock && !lock_status) {
+					printk("Cannot lock sector at address %x length %x\n",
+					       eraseoffset, merip->erasesize);
+					retval = -1;
+				}
+			}
+			eraseoffset += erasesize;
+			eraseblocks --;
+		}
+	}
+	return retval;
+}
+
+static int amd_flash_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	return amd_flash_do_unlock(mtd, ofs, len, 1);
+}
+
+static int amd_flash_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	return amd_flash_do_unlock(mtd, ofs, len, 0);
+}
+
+
+/*
+ * Reads JEDEC manufacturer ID and device ID and returns the index of the first
+ * matching table entry (-1 if not found or alias for already found chip).
+ */ 
+static int probe_new_chip(struct mtd_info *mtd, __u32 base,
+			  struct flchip *chips,
+			  struct amd_flash_private *private,
+			  const struct amd_flash_info *table, int table_size)
+{
+	__u32 mfr_id;
+	__u32 dev_id;
+	struct map_info *map = mtd->priv;
+	struct amd_flash_private temp;
+	int i;
+
+	temp.device_type = DEVICE_TYPE_X16;	// Assume X16 (FIXME)
+	temp.interleave = 2;
+	map->fldrv_priv = &temp;
+
+	/* Enter autoselect mode. */
+	send_cmd(map, base, CMD_RESET_DATA);
+	send_cmd(map, base, CMD_MANUFACTURER_UNLOCK_DATA);
+
+	mfr_id = wide_read(map, base + (map->buswidth * ADDR_MANUFACTURER));
+	dev_id = wide_read(map, base + (map->buswidth * ADDR_DEVICE_ID));
+
+	if ((map->buswidth == 4) && ((mfr_id >> 16) == (mfr_id & 0xffff)) &&
+	    ((dev_id >> 16) == (dev_id & 0xffff))) {
+		mfr_id &= 0xffff;
+		dev_id &= 0xffff;
+	} else {
+		temp.interleave = 1;
+	}
+
+	for (i = 0; i < table_size; i++) {
+		if ((mfr_id == table[i].mfr_id) &&
+		    (dev_id == table[i].dev_id)) {
+			if (chips) {
+				int j;
+
+				/* Is this an alias for an already found chip?
+				 * In that case that chip should be in
+				 * autoselect mode now.
+				 */
+				for (j = 0; j < private->numchips; j++) {
+					__u32 mfr_id_other;
+					__u32 dev_id_other;
+
+					mfr_id_other =
+						wide_read(map, chips[j].start +
+							       (map->buswidth *
+								ADDR_MANUFACTURER
+							       ));
+					dev_id_other =
+						wide_read(map, chips[j].start +
+					    		       (map->buswidth *
+							        ADDR_DEVICE_ID));
+					if (temp.interleave == 2) {
+						mfr_id_other &= 0xffff;
+						dev_id_other &= 0xffff;
+					}
+					if ((mfr_id_other == mfr_id) &&
+					    (dev_id_other == dev_id)) {
+
+						/* Exit autoselect mode. */
+						send_cmd(map, base,
+							 CMD_RESET_DATA);
+
+						return -1;
+					}
+				}
+
+				if (private->numchips == MAX_AMD_CHIPS) {
+					printk(KERN_WARNING
+					       "%s: Too many flash chips "
+					       "detected. Increase "
+					       "MAX_AMD_CHIPS from %d.\n",
+					       map->name, MAX_AMD_CHIPS);
+
+					return -1;
+				}
+
+				chips[private->numchips].start = base;
+				chips[private->numchips].state = FL_READY;
+				chips[private->numchips].mutex =
+					&chips[private->numchips]._spinlock;
+				private->numchips++;
+			}
+
+			printk("%s: Found %d x %ldMiB %s at 0x%x\n", map->name,
+			       temp.interleave, (table[i].size)/(1024*1024),
+			       table[i].name, base);
+
+			mtd->size += table[i].size * temp.interleave;
+			mtd->numeraseregions += table[i].numeraseregions;
+
+			break;
+		}
+	}
+
+	/* Exit autoselect mode. */
+	send_cmd(map, base, CMD_RESET_DATA);
+
+	if (i == table_size) {
+		printk(KERN_DEBUG "%s: unknown flash device at 0x%x, "
+		       "mfr id 0x%x, dev id 0x%x\n", map->name,
+		       base, mfr_id, dev_id);
+		map->fldrv_priv = NULL;
+
+		return -1;
+	}
+
+	private->device_type = temp.device_type;
+	private->interleave = temp.interleave;
+
+	return i;
+}
+
+
+
+static struct mtd_info *amd_flash_probe(struct map_info *map)
+{
+	static const struct amd_flash_info table[] = {
+	{
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29LV160DT,
+		.name = "AMD AM29LV160DT",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 },
+			{ .offset = 0x1F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x1F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x1FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29LV160DB,
+		.name = "AMD AM29LV160DB",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_TOSHIBA,
+		.dev_id = TC58FVT160,
+		.name = "Toshiba TC58FVT160",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 },
+			{ .offset = 0x1F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x1F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x1FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_FUJITSU,
+		.dev_id = MBM29LV160TE,
+		.name = "Fujitsu MBM29LV160TE",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 },
+			{ .offset = 0x1F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x1F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x1FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_TOSHIBA,
+		.dev_id = TC58FVB160,
+		.name = "Toshiba TC58FVB160",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_FUJITSU,
+		.dev_id = MBM29LV160BE,
+		.name = "Fujitsu MBM29LV160BE",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29LV800BB,
+		.name = "AMD AM29LV800BB",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 15 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29F800BB,
+		.name = "AMD AM29F800BB",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 15 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29LV800BT,
+		.name = "AMD AM29LV800BT",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 },
+			{ .offset = 0x0F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x0F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x0FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29F800BT,
+		.name = "AMD AM29F800BT",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 },
+			{ .offset = 0x0F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x0F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x0FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29LV800BB,
+		.name = "AMD AM29LV800BB",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 },
+			{ .offset = 0x0F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x0F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x0FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_FUJITSU,
+		.dev_id = MBM29LV800BB,
+		.name = "Fujitsu MBM29LV800BB",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 15 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_ST,
+		.dev_id = M29W800T,
+		.name = "ST M29W800T",
+		.size = 0x00100000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 15 },
+			{ .offset = 0x0F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x0F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x0FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_ST,
+		.dev_id = M29W160DT,
+		.name = "ST M29W160DT",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 },
+			{ .offset = 0x1F0000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x1F8000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x1FC000, .erasesize = 0x04000, .numblocks =  1 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_ST,
+		.dev_id = M29W160DB,
+		.name = "ST M29W160DB",
+		.size = 0x00200000,
+		.numeraseregions = 4,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x04000, .numblocks =  1 },
+			{ .offset = 0x004000, .erasesize = 0x02000, .numblocks =  2 },
+			{ .offset = 0x008000, .erasesize = 0x08000, .numblocks =  1 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29BDS323D,
+		.name = "AMD AM29BDS323D",
+		.size = 0x00400000,
+		.numeraseregions = 3,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 48 },
+			{ .offset = 0x300000, .erasesize = 0x10000, .numblocks = 15 },
+			{ .offset = 0x3f0000, .erasesize = 0x02000, .numblocks =  8 },
+		}
+	}, {
+		.mfr_id = MANUFACTURER_AMD,
+		.dev_id = AM29BDS643D,
+		.name = "AMD AM29BDS643D",
+		.size = 0x00800000,
+		.numeraseregions = 3,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 96 },
+			{ .offset = 0x600000, .erasesize = 0x10000, .numblocks = 31 },
+			{ .offset = 0x7f0000, .erasesize = 0x02000, .numblocks =  8 },
+		}
+	}, {
+		.mfr_id = MANUFACTURER_ATMEL,
+		.dev_id = AT49xV16x,
+		.name = "Atmel AT49xV16x",
+		.size = 0x00200000,
+		.numeraseregions = 2,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x02000, .numblocks =  8 },
+			{ .offset = 0x010000, .erasesize = 0x10000, .numblocks = 31 }
+		}
+	}, {
+		.mfr_id = MANUFACTURER_ATMEL,
+		.dev_id = AT49xV16xT,
+		.name = "Atmel AT49xV16xT",
+		.size = 0x00200000,
+		.numeraseregions = 2,
+		.regions = {
+			{ .offset = 0x000000, .erasesize = 0x10000, .numblocks = 31 },
+			{ .offset = 0x1F0000, .erasesize = 0x02000, .numblocks =  8 }
+		}
+	} 
+	};
+
+	struct mtd_info *mtd;
+	struct flchip chips[MAX_AMD_CHIPS];
+	int table_pos[MAX_AMD_CHIPS];
+	struct amd_flash_private temp;
+	struct amd_flash_private *private;
+	u_long size;
+	unsigned long base;
+	int i;
+	int reg_idx;
+	int offset;
+
+	mtd = (struct mtd_info*)kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd) {
+		printk(KERN_WARNING
+		       "%s: kmalloc failed for info structure\n", map->name);
+		return NULL;
+	}
+	memset(mtd, 0, sizeof(*mtd));
+	mtd->priv = map;
+
+	memset(&temp, 0, sizeof(temp));
+
+	printk("%s: Probing for AMD compatible flash...\n", map->name);
+
+	if ((table_pos[0] = probe_new_chip(mtd, 0, NULL, &temp, table,
+					   sizeof(table)/sizeof(table[0])))
+	    == -1) {
+		printk(KERN_WARNING
+		       "%s: Found no AMD compatible device at location zero\n",
+		       map->name);
+		kfree(mtd);
+
+		return NULL;
+	}
+
+	chips[0].start = 0;
+	chips[0].state = FL_READY;
+	chips[0].mutex = &chips[0]._spinlock;
+	temp.numchips = 1;
+	for (size = mtd->size; size > 1; size >>= 1) {
+		temp.chipshift++;
+	}
+	switch (temp.interleave) {
+		case 2:
+			temp.chipshift += 1;
+			break;
+		case 4:
+			temp.chipshift += 2;
+			break;
+	}
+
+	/* Find out if there are any more chips in the map. */
+	for (base = (1 << temp.chipshift);
+	     base < map->size;
+	     base += (1 << temp.chipshift)) {
+	     	int numchips = temp.numchips;
+		table_pos[numchips] = probe_new_chip(mtd, base, chips,
+			&temp, table, sizeof(table)/sizeof(table[0]));
+	}
+
+	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) *
+				    mtd->numeraseregions, GFP_KERNEL);
+	if (!mtd->eraseregions) { 
+		printk(KERN_WARNING "%s: Failed to allocate "
+		       "memory for MTD erase region info\n", map->name);
+		kfree(mtd);
+		map->fldrv_priv = NULL;
+		return NULL;
+	}
+
+	reg_idx = 0;
+	offset = 0;
+	for (i = 0; i < temp.numchips; i++) {
+		int dev_size;
+		int j;
+
+		dev_size = 0;
+		for (j = 0; j < table[table_pos[i]].numeraseregions; j++) {
+			mtd->eraseregions[reg_idx].offset = offset +
+				(table[table_pos[i]].regions[j].offset *
+				 temp.interleave);
+			mtd->eraseregions[reg_idx].erasesize =
+				table[table_pos[i]].regions[j].erasesize *
+				temp.interleave;
+			mtd->eraseregions[reg_idx].numblocks =
+				table[table_pos[i]].regions[j].numblocks;
+			if (mtd->erasesize <
+			    mtd->eraseregions[reg_idx].erasesize) {
+				mtd->erasesize =
+					mtd->eraseregions[reg_idx].erasesize;
+			}
+			dev_size += mtd->eraseregions[reg_idx].erasesize *
+				    mtd->eraseregions[reg_idx].numblocks;
+			reg_idx++;
+		}
+		offset += dev_size;
+	}
+	mtd->type = MTD_NORFLASH;
+	mtd->flags = MTD_CAP_NORFLASH;
+	mtd->name = map->name;
+	mtd->erase = amd_flash_erase;	
+	mtd->read = amd_flash_read;	
+	mtd->write = amd_flash_write;	
+	mtd->sync = amd_flash_sync;	
+	mtd->suspend = amd_flash_suspend;	
+	mtd->resume = amd_flash_resume;	
+	mtd->lock = amd_flash_lock;
+	mtd->unlock = amd_flash_unlock;
+
+	private = kmalloc(sizeof(*private) + (sizeof(struct flchip) *
+					      temp.numchips), GFP_KERNEL);
+	if (!private) {
+		printk(KERN_WARNING
+		       "%s: kmalloc failed for private structure\n", map->name);
+		kfree(mtd);
+		map->fldrv_priv = NULL;
+		return NULL;
+	}
+	memcpy(private, &temp, sizeof(temp));
+	memcpy(private->chips, chips,
+	       sizeof(struct flchip) * private->numchips);
+	for (i = 0; i < private->numchips; i++) {
+		init_waitqueue_head(&private->chips[i].wq);
+		spin_lock_init(&private->chips[i]._spinlock);
+	}
+
+	map->fldrv_priv = private;
+
+	map->fldrv = &amd_flash_chipdrv;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+}
+
+
+
+static inline int read_one_chip(struct map_info *map, struct flchip *chip,
+			       loff_t adr, size_t len, u_char *buf)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long timeo = jiffies + HZ;
+
+retry:
+	spin_lock_bh(chip->mutex);
+
+	if (chip->state != FL_READY){
+		printk(KERN_INFO "%s: waiting for chip to read, state = %d\n",
+		       map->name, chip->state);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+                
+		spin_unlock_bh(chip->mutex);
+
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+
+		if(signal_pending(current)) {
+			return -EINTR;
+		}
+
+		timeo = jiffies + HZ;
+
+		goto retry;
+	}	
+
+	adr += chip->start;
+
+	chip->state = FL_READY;
+
+	map_copy_from(map, buf, adr, len);
+
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+
+	return 0;
+}
+
+
+
+static int amd_flash_read(struct mtd_info *mtd, loff_t from, size_t len,
+			  size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct amd_flash_private *private = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+	int ret = 0;
+
+	if ((from + len) > mtd->size) {
+		printk(KERN_WARNING "%s: read request past end of device "
+		       "(0x%lx)\n", map->name, (unsigned long)from + len);
+
+		return -EINVAL;
+	}
+
+	/* Offset within the first chip that the first read should start. */
+	chipnum = (from >> private->chipshift);
+	ofs = from - (chipnum <<  private->chipshift);
+
+	*retlen = 0;
+
+	while (len) {
+		unsigned long this_len;
+
+		if (chipnum >= private->numchips) {
+			break;
+		}
+
+		if ((len + ofs - 1) >> private->chipshift) {
+			this_len = (1 << private->chipshift) - ofs;
+		} else {
+			this_len = len;
+		}
+
+		ret = read_one_chip(map, &private->chips[chipnum], ofs,
+				    this_len, buf);
+		if (ret) {
+			break;
+		}
+
+		*retlen += this_len;
+		len -= this_len;
+		buf += this_len;
+
+		ofs = 0;
+		chipnum++;
+	}
+
+	return ret;
+}
+
+
+
+static int write_one_word(struct map_info *map, struct flchip *chip,
+			  unsigned long adr, __u32 datum)
+{
+	unsigned long timeo = jiffies + HZ;
+	struct amd_flash_private *private = map->fldrv_priv;
+	DECLARE_WAITQUEUE(wait, current);
+	int ret = 0;
+	int times_left;
+
+retry:
+	spin_lock_bh(chip->mutex);
+
+	if (chip->state != FL_READY){
+		printk("%s: waiting for chip to write, state = %d\n",
+		       map->name, chip->state);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+                
+		spin_unlock_bh(chip->mutex);
+
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		printk(KERN_INFO "%s: woke up to write\n", map->name);
+		if(signal_pending(current))
+			return -EINTR;
+
+		timeo = jiffies + HZ;
+
+		goto retry;
+	}	
+
+	chip->state = FL_WRITING;
+
+	adr += chip->start;
+	ENABLE_VPP(map);
+	send_cmd(map, chip->start, CMD_PROGRAM_UNLOCK_DATA);
+	wide_write(map, datum, adr);
+
+	times_left = 500000;
+	while (times_left-- && flash_is_busy(map, adr, private->interleave)) { 
+		if (need_resched()) {
+			spin_unlock_bh(chip->mutex);
+			schedule();
+			spin_lock_bh(chip->mutex);
+		}
+	}
+
+	if (!times_left) {
+		printk(KERN_WARNING "%s: write to 0x%lx timed out!\n",
+		       map->name, adr);
+		ret = -EIO;
+	} else {
+		__u32 verify;
+		if ((verify = wide_read(map, adr)) != datum) {
+			printk(KERN_WARNING "%s: write to 0x%lx failed. "
+			       "datum = %x, verify = %x\n",
+			       map->name, adr, datum, verify);
+			ret = -EIO;
+		}
+	}
+
+	DISABLE_VPP(map);
+	chip->state = FL_READY;
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+
+	return ret;
+}
+
+
+
+static int amd_flash_write(struct mtd_info *mtd, loff_t to , size_t len,
+			   size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct amd_flash_private *private = map->fldrv_priv;
+	int ret = 0;
+	int chipnum;
+	unsigned long ofs;
+	unsigned long chipstart;
+
+	*retlen = 0;
+	if (!len) {
+		return 0;
+	}
+
+	chipnum = to >> private->chipshift;
+	ofs = to  - (chipnum << private->chipshift);
+	chipstart = private->chips[chipnum].start;
+
+	/* If it's not bus-aligned, do the first byte write. */
+	if (ofs & (map->buswidth - 1)) {
+		unsigned long bus_ofs = ofs & ~(map->buswidth - 1);
+		int i = ofs - bus_ofs;
+		int n = 0;
+		u_char tmp_buf[4];
+		__u32 datum;
+
+		map_copy_from(map, tmp_buf,
+			       bus_ofs + private->chips[chipnum].start,
+			       map->buswidth);
+		while (len && i < map->buswidth)
+			tmp_buf[i++] = buf[n++], len--;
+
+		if (map->buswidth == 2) {
+			datum = *(__u16*)tmp_buf;
+		} else if (map->buswidth == 4) {
+			datum = *(__u32*)tmp_buf;
+		} else {
+			return -EINVAL;  /* should never happen, but be safe */
+		}
+
+		ret = write_one_word(map, &private->chips[chipnum], bus_ofs,
+				     datum);
+		if (ret) {
+			return ret;
+		}
+		
+		ofs += n;
+		buf += n;
+		(*retlen) += n;
+
+		if (ofs >> private->chipshift) {
+			chipnum++;
+			ofs = 0;
+			if (chipnum == private->numchips) {
+				return 0;
+			}
+		}
+	}
+	
+	/* We are now aligned, write as much as possible. */
+	while(len >= map->buswidth) {
+		__u32 datum;
+
+		if (map->buswidth == 1) {
+			datum = *(__u8*)buf;
+		} else if (map->buswidth == 2) {
+			datum = *(__u16*)buf;
+		} else if (map->buswidth == 4) {
+			datum = *(__u32*)buf;
+		} else {
+			return -EINVAL;
+		}
+
+		ret = write_one_word(map, &private->chips[chipnum], ofs, datum);
+
+		if (ret) {
+			return ret;
+		}
+
+		ofs += map->buswidth;
+		buf += map->buswidth;
+		(*retlen) += map->buswidth;
+		len -= map->buswidth;
+
+		if (ofs >> private->chipshift) {
+			chipnum++;
+			ofs = 0;
+			if (chipnum == private->numchips) {
+				return 0;
+			}
+			chipstart = private->chips[chipnum].start;
+		}
+	}
+
+	if (len & (map->buswidth - 1)) {
+		int i = 0, n = 0;
+		u_char tmp_buf[2];
+		__u32 datum;
+
+		map_copy_from(map, tmp_buf,
+			       ofs + private->chips[chipnum].start,
+			       map->buswidth);
+		while (len--) {
+			tmp_buf[i++] = buf[n++];
+		}
+
+		if (map->buswidth == 2) {
+			datum = *(__u16*)tmp_buf;
+		} else if (map->buswidth == 4) {
+			datum = *(__u32*)tmp_buf;
+		} else {
+			return -EINVAL;  /* should never happen, but be safe */
+		}
+
+		ret = write_one_word(map, &private->chips[chipnum], ofs, datum);
+
+		if (ret) {
+			return ret;
+		}
+		
+		(*retlen) += n;
+	}
+
+	return 0;
+}
+
+
+
+static inline int erase_one_block(struct map_info *map, struct flchip *chip,
+				  unsigned long adr, u_long size)
+{
+	unsigned long timeo = jiffies + HZ;
+	struct amd_flash_private *private = map->fldrv_priv;
+	DECLARE_WAITQUEUE(wait, current);
+
+retry:
+	spin_lock_bh(chip->mutex);
+
+	if (chip->state != FL_READY){
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+                
+		spin_unlock_bh(chip->mutex);
+
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+
+		if (signal_pending(current)) {
+			return -EINTR;
+		}
+
+		timeo = jiffies + HZ;
+
+		goto retry;
+	}	
+
+	chip->state = FL_ERASING;
+
+	adr += chip->start;
+	ENABLE_VPP(map);
+	send_cmd(map, chip->start, CMD_SECTOR_ERASE_UNLOCK_DATA);
+	send_cmd_to_addr(map, chip->start, CMD_SECTOR_ERASE_UNLOCK_DATA_2, adr);
+	
+	timeo = jiffies + (HZ * 20);
+
+	spin_unlock_bh(chip->mutex);
+	msleep(1000);
+	spin_lock_bh(chip->mutex);
+	
+	while (flash_is_busy(map, adr, private->interleave)) {
+
+		if (chip->state != FL_ERASING) {
+			/* Someone's suspended the erase. Sleep */
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_INFO "%s: erase suspended. Sleeping\n",
+			       map->name);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			
+			if (signal_pending(current)) {
+				return -EINTR;
+			}
+			
+			timeo = jiffies + (HZ*2); /* FIXME */
+			spin_lock_bh(chip->mutex);
+			continue;
+		}
+
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			chip->state = FL_READY;
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_WARNING "%s: waiting for erase to complete "
+			       "timed out.\n", map->name);
+			DISABLE_VPP(map);
+
+			return -EIO;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+
+		if (need_resched())
+			schedule();
+		else
+			udelay(1);
+		
+		spin_lock_bh(chip->mutex);
+	}
+
+	/* Verify every single word */
+	{
+		int address;
+		int error = 0;
+		__u8 verify;
+
+		for (address = adr; address < (adr + size); address++) {
+			if ((verify = map_read8(map, address)) != 0xFF) {
+				error = 1;
+				break;
+			}
+		}
+		if (error) {
+			chip->state = FL_READY;
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_WARNING
+			       "%s: verify error at 0x%x, size %ld.\n",
+			       map->name, address, size);
+			DISABLE_VPP(map);
+
+			return -EIO;
+		}
+	}
+	
+	DISABLE_VPP(map);
+	chip->state = FL_READY;
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+
+	return 0;
+}
+
+
+
+static int amd_flash_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	struct map_info *map = mtd->priv;
+	struct amd_flash_private *private = map->fldrv_priv;
+	unsigned long adr, len;
+	int chipnum;
+	int ret = 0;
+	int i;
+	int first;
+	struct mtd_erase_region_info *regions = mtd->eraseregions;
+
+	if (instr->addr > mtd->size) {
+		return -EINVAL;
+	}
+
+	if ((instr->len + instr->addr) > mtd->size) {
+		return -EINVAL;
+	}
+
+	/* Check that both start and end of the requested erase are
+	 * aligned with the erasesize at the appropriate addresses.
+	 */
+
+	i = 0;
+
+        /* Skip all erase regions which are ended before the start of
+           the requested erase. Actually, to save on the calculations,
+           we skip to the first erase region which starts after the
+           start of the requested erase, and then go back one.
+        */
+
+        while ((i < mtd->numeraseregions) &&
+	       (instr->addr >= regions[i].offset)) {
+               i++;
+	}
+        i--;
+
+	/* OK, now i is pointing at the erase region in which this
+	 * erase request starts. Check the start of the requested
+	 * erase range is aligned with the erase size which is in
+	 * effect here.
+	 */
+
+	if (instr->addr & (regions[i].erasesize-1)) {
+		return -EINVAL;
+	}
+
+	/* Remember the erase region we start on. */
+
+	first = i;
+
+	/* Next, check that the end of the requested erase is aligned
+	 * with the erase region at that address.
+	 */
+
+	while ((i < mtd->numeraseregions) && 
+	       ((instr->addr + instr->len) >= regions[i].offset)) {
+                i++;
+	}
+
+	/* As before, drop back one to point at the region in which
+	 * the address actually falls.
+	 */
+
+	i--;
+
+	if ((instr->addr + instr->len) & (regions[i].erasesize-1)) {
+                return -EINVAL;
+	}
+
+	chipnum = instr->addr >> private->chipshift;
+	adr = instr->addr - (chipnum << private->chipshift);
+	len = instr->len;
+
+	i = first;
+
+	while (len) {
+		ret = erase_one_block(map, &private->chips[chipnum], adr,
+				      regions[i].erasesize);
+
+		if (ret) {
+			return ret;
+		}
+
+		adr += regions[i].erasesize;
+		len -= regions[i].erasesize;
+
+		if ((adr % (1 << private->chipshift)) ==
+		    ((regions[i].offset + (regions[i].erasesize *
+		    			   regions[i].numblocks))
+		     % (1 << private->chipshift))) {
+			i++;
+		}
+
+		if (adr >> private->chipshift) {
+			adr = 0;
+			chipnum++;
+			if (chipnum >= private->numchips) {
+				break;
+			}
+		}
+	}
+		
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+	
+	return 0;
+}
+
+
+
+static void amd_flash_sync(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct amd_flash_private *private = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+	DECLARE_WAITQUEUE(wait, current);
+
+	for (i = 0; !ret && (i < private->numchips); i++) {
+		chip = &private->chips[i];
+
+	retry:
+		spin_lock_bh(chip->mutex);
+
+		switch(chip->state) {
+		case FL_READY:
+		case FL_STATUS:
+		case FL_CFI_QUERY:
+		case FL_JEDEC_QUERY:
+			chip->oldstate = chip->state;
+			chip->state = FL_SYNCING;
+			/* No need to wake_up() on this state change - 
+			 * as the whole point is that nobody can do anything
+			 * with the chip now anyway.
+			 */
+		case FL_SYNCING:
+			spin_unlock_bh(chip->mutex);
+			break;
+
+		default:
+			/* Not an idle state */
+			add_wait_queue(&chip->wq, &wait);
+			
+			spin_unlock_bh(chip->mutex);
+
+			schedule();
+
+		        remove_wait_queue(&chip->wq, &wait);
+			
+			goto retry;
+		}
+	}
+
+	/* Unlock the chips again */
+	for (i--; i >= 0; i--) {
+		chip = &private->chips[i];
+
+		spin_lock_bh(chip->mutex);
+		
+		if (chip->state == FL_SYNCING) {
+			chip->state = chip->oldstate;
+			wake_up(&chip->wq);
+		}
+		spin_unlock_bh(chip->mutex);
+	}
+}
+
+
+
+static int amd_flash_suspend(struct mtd_info *mtd)
+{
+printk("amd_flash_suspend(): not implemented!\n");
+	return -EINVAL;
+}
+
+
+
+static void amd_flash_resume(struct mtd_info *mtd)
+{
+printk("amd_flash_resume(): not implemented!\n");
+}
+
+
+
+static void amd_flash_destroy(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct amd_flash_private *private = map->fldrv_priv;
+	kfree(private);
+}
+
+int __init amd_flash_init(void)
+{
+	register_mtd_chip_driver(&amd_flash_chipdrv);
+	return 0;
+}
+
+void __exit amd_flash_exit(void)
+{
+	unregister_mtd_chip_driver(&amd_flash_chipdrv);
+}
+
+module_init(amd_flash_init);
+module_exit(amd_flash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jonas Holmberg <jonas.holmberg@axis.com>");
+MODULE_DESCRIPTION("Old MTD chip driver for AMD flash chips");
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
new file mode 100644
index 000000000000..c268bcd71720
--- /dev/null
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -0,0 +1,2160 @@
+/*
+ * Common Flash Interface support:
+ *   Intel Extended Vendor Command Set (ID 0x0001)
+ *
+ * (C) 2000 Red Hat. GPL'd
+ *
+ * $Id: cfi_cmdset_0001.c,v 1.164 2004/11/16 18:29:00 dwmw2 Exp $
+ *
+ * 
+ * 10/10/2000	Nicolas Pitre <nico@cam.org>
+ * 	- completely revamped method functions so they are aware and
+ * 	  independent of the flash geometry (buswidth, interleave, etc.)
+ * 	- scalability vs code size is completely set at compile-time
+ * 	  (see include/linux/mtd/cfi.h for selection)
+ *	- 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
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/xip.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/mtd/cfi.h>
+
+/* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */
+/* #define CMDSET0001_DISABLE_WRITE_SUSPEND */
+
+// debugging, turns off buffer write mode if set to 1
+#define FORCE_WORD_WRITE 0
+
+#define MANUFACTURER_INTEL	0x0089
+#define I82802AB	0x00ad
+#define I82802AC	0x00ac
+#define MANUFACTURER_ST         0x0020
+#define M50LPW080       0x002F
+
+static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+//static int cfi_intelext_read_user_prot_reg (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+//static int cfi_intelext_read_fact_prot_reg (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 *);
+static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *);
+static void cfi_intelext_sync (struct mtd_info *);
+static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len);
+static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len);
+static int cfi_intelext_suspend (struct mtd_info *);
+static void cfi_intelext_resume (struct mtd_info *);
+
+static void cfi_intelext_destroy(struct mtd_info *);
+
+struct mtd_info *cfi_cmdset_0001(struct map_info *, int);
+
+static struct mtd_info *cfi_intelext_setup (struct mtd_info *);
+static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **);
+
+static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len,
+		     size_t *retlen, u_char **mtdbuf);
+static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from,
+			size_t len);
+
+static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
+static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr);
+#include "fwh_lock.h"
+
+
+
+/*
+ *  *********** SETUP AND PROBE BITS  ***********
+ */
+
+static struct mtd_chip_driver cfi_intelext_chipdrv = {
+	.probe		= NULL, /* Not usable directly */
+	.destroy	= cfi_intelext_destroy,
+	.name		= "cfi_cmdset_0001",
+	.module		= THIS_MODULE
+};
+
+/* #define DEBUG_LOCK_BITS */
+/* #define DEBUG_CFI_FEATURES */
+
+#ifdef DEBUG_CFI_FEATURES
+static void cfi_tell_features(struct cfi_pri_intelext *extp)
+{
+	int i;
+	printk("  Feature/Command Support:      %4.4X\n", extp->FeatureSupport);
+	printk("     - Chip Erase:              %s\n", extp->FeatureSupport&1?"supported":"unsupported");
+	printk("     - Suspend Erase:           %s\n", extp->FeatureSupport&2?"supported":"unsupported");
+	printk("     - Suspend Program:         %s\n", extp->FeatureSupport&4?"supported":"unsupported");
+	printk("     - Legacy Lock/Unlock:      %s\n", extp->FeatureSupport&8?"supported":"unsupported");
+	printk("     - Queued Erase:            %s\n", extp->FeatureSupport&16?"supported":"unsupported");
+	printk("     - Instant block lock:      %s\n", extp->FeatureSupport&32?"supported":"unsupported");
+	printk("     - Protection Bits:         %s\n", extp->FeatureSupport&64?"supported":"unsupported");
+	printk("     - Page-mode read:          %s\n", extp->FeatureSupport&128?"supported":"unsupported");
+	printk("     - Synchronous read:        %s\n", extp->FeatureSupport&256?"supported":"unsupported");
+	printk("     - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported");
+	for (i=10; i<32; i++) {
+		if (extp->FeatureSupport & (1<<i)) 
+			printk("     - Unknown Bit %X:      supported\n", i);
+	}
+	
+	printk("  Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport);
+	printk("     - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported");
+	for (i=1; i<8; i++) {
+		if (extp->SuspendCmdSupport & (1<<i))
+			printk("     - Unknown Bit %X:               supported\n", i);
+	}
+	
+	printk("  Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask);
+	printk("     - Lock Bit Active:      %s\n", extp->BlkStatusRegMask&1?"yes":"no");
+	printk("     - Valid Bit Active:     %s\n", extp->BlkStatusRegMask&2?"yes":"no");
+	for (i=2; i<16; i++) {
+		if (extp->BlkStatusRegMask & (1<<i))
+			printk("     - Unknown Bit %X Active: yes\n",i);
+	}
+	
+	printk("  Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", 
+	       extp->VccOptimal >> 4, extp->VccOptimal & 0xf);
+	if (extp->VppOptimal)
+		printk("  Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", 
+		       extp->VppOptimal >> 4, extp->VppOptimal & 0xf);
+}
+#endif
+
+#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)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
+
+	printk(KERN_WARNING "cfi_cmdset_0001: Suspend "
+	                    "erase on write disabled.\n");
+	extp->SuspendCmdSupport &= ~1;
+}
+#endif
+
+#ifdef CMDSET0001_DISABLE_WRITE_SUSPEND
+static void fixup_no_write_suspend(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;
+
+	if (cfip && (cfip->FeatureSupport&4)) {
+		cfip->FeatureSupport &= ~4;
+		printk(KERN_WARNING "cfi_cmdset_0001: write suspend disabled\n");
+	}
+}
+#endif
+
+static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	
+	cfi->cfiq->BufWriteTimeoutTyp = 0;	/* Not supported */
+	cfi->cfiq->BufWriteTimeoutMax = 0;	/* Not supported */
+}
+
+static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	
+	/* Note this is done after the region info is endian swapped */
+	cfi->cfiq->EraseRegionInfo[1] =
+		(cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e;
+};
+
+static void fixup_use_point(struct mtd_info *mtd, void *param)
+{
+	struct map_info *map = mtd->priv;
+	if (!mtd->point && map_is_linear(map)) {
+		mtd->point   = cfi_intelext_point;
+		mtd->unpoint = cfi_intelext_unpoint;
+	}
+}
+
+static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	if (cfi->cfiq->BufWriteTimeoutTyp) {
+		printk(KERN_INFO "Using buffer write method\n" );
+		mtd->write = cfi_intelext_write_buffers;
+	}
+}
+
+static struct cfi_fixup cfi_fixup_table[] = {
+#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, 
+#endif
+#ifdef CMDSET0001_DISABLE_WRITE_SUSPEND
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL },
+#endif
+#if !FORCE_WORD_WRITE
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL },
+#endif
+	{ CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL },
+	{ CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL },
+	{ 0, 0, NULL, NULL }
+};
+
+static struct cfi_fixup jedec_fixup_table[] = {
+	{ MANUFACTURER_INTEL, I82802AB,   fixup_use_fwh_lock, NULL, },
+	{ MANUFACTURER_INTEL, I82802AC,   fixup_use_fwh_lock, NULL, },
+	{ MANUFACTURER_ST,    M50LPW080,  fixup_use_fwh_lock, NULL, },
+	{ 0, 0, NULL, NULL }
+};
+static struct cfi_fixup fixup_table[] = {
+	/* The CFI vendor ids and the JEDEC vendor IDs appear
+	 * to be common.  It is like the devices id's are as
+	 * well.  This table is to pick all cases where
+	 * we know that is the case.
+	 */
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_point, NULL },
+	{ 0, 0, NULL, NULL }
+};
+
+static inline struct cfi_pri_intelext *
+read_pri_intelext(struct map_info *map, __u16 adr)
+{
+	struct cfi_pri_intelext *extp;
+	unsigned int extp_size = sizeof(*extp);
+
+ again:
+	extp = (struct cfi_pri_intelext *)cfi_read_pri(map, adr, extp_size, "Intel/Sharp");
+	if (!extp)
+		return NULL;
+
+	/* Do some byteswapping if necessary */
+	extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport);
+	extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask);
+	extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr);
+
+	if (extp->MajorVersion == '1' && extp->MinorVersion == '3') {
+		unsigned int extra_size = 0;
+		int nb_parts, i;
+
+		/* Protection Register info */
+		extra_size += (extp->NumProtectionFields - 1) * (4 + 6);
+
+		/* Burst Read info */
+		extra_size += 6;
+
+		/* Number of hardware-partitions */
+		extra_size += 1;
+		if (extp_size < sizeof(*extp) + extra_size)
+			goto need_more;
+		nb_parts = extp->extra[extra_size - 1];
+
+		for (i = 0; i < nb_parts; i++) {
+			struct cfi_intelext_regioninfo *rinfo;
+			rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size];
+			extra_size += sizeof(*rinfo);
+			if (extp_size < sizeof(*extp) + extra_size)
+				goto need_more;
+			rinfo->NumIdentPartitions=le16_to_cpu(rinfo->NumIdentPartitions);
+			extra_size += (rinfo->NumBlockTypes - 1)
+				      * sizeof(struct cfi_intelext_blockinfo);
+		}
+
+		if (extp_size < sizeof(*extp) + extra_size) {
+			need_more:
+			extp_size = sizeof(*extp) + extra_size;
+			kfree(extp);
+			if (extp_size > 4096) {
+				printk(KERN_ERR
+					"%s: cfi_pri_intelext is too fat\n",
+					__FUNCTION__);
+				return NULL;
+			}
+			goto again;
+		}
+	}
+		
+	return extp;
+}
+
+/* This routine is made available to other mtd code via
+ * inter_module_register.  It must only be accessed through
+ * inter_module_get which will bump the use count of this module.  The
+ * addresses passed back in cfi are valid as long as the use count of
+ * this module is non-zero, i.e. between inter_module_get and
+ * inter_module_put.  Keith Owens <kaos@ocs.com.au> 29 Oct 2000.
+ */
+struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct mtd_info *mtd;
+	int i;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd) {
+		printk(KERN_ERR "Failed to allocate memory for MTD device\n");
+		return NULL;
+	}
+	memset(mtd, 0, sizeof(*mtd));
+	mtd->priv = map;
+	mtd->type = MTD_NORFLASH;
+
+	/* Fill in the default mtd operations */
+	mtd->erase   = cfi_intelext_erase_varsize;
+	mtd->read    = cfi_intelext_read;
+	mtd->write   = cfi_intelext_write_words;
+	mtd->sync    = cfi_intelext_sync;
+	mtd->lock    = cfi_intelext_lock;
+	mtd->unlock  = cfi_intelext_unlock;
+	mtd->suspend = cfi_intelext_suspend;
+	mtd->resume  = cfi_intelext_resume;
+	mtd->flags   = MTD_CAP_NORFLASH;
+	mtd->name    = map->name;
+	
+	if (cfi->cfi_mode == CFI_MODE_CFI) {
+		/* 
+		 * It's a real CFI chip, not one for which the probe
+		 * routine faked a CFI structure. So we read the feature
+		 * table from it.
+		 */
+		__u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
+		struct cfi_pri_intelext *extp;
+
+		extp = read_pri_intelext(map, adr);
+		if (!extp) {
+			kfree(mtd);
+			return NULL;
+		}
+
+		/* Install our own private info structure */
+		cfi->cmdset_priv = extp;	
+
+		cfi_fixup(mtd, cfi_fixup_table);
+
+#ifdef DEBUG_CFI_FEATURES
+		/* Tell the user about it in lots of lovely detail */
+		cfi_tell_features(extp);
+#endif	
+
+		if(extp->SuspendCmdSupport & 1) {
+			printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n");
+		}
+	}
+	else if (cfi->cfi_mode == CFI_MODE_JEDEC) {
+		/* Apply jedec specific fixups */
+		cfi_fixup(mtd, jedec_fixup_table);
+	}
+	/* Apply generic fixups */
+	cfi_fixup(mtd, fixup_table);
+
+	for (i=0; i< cfi->numchips; i++) {
+		cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp;
+		cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp;
+		cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp;
+		cfi->chips[i].ref_point_counter = 0;
+	}		
+
+	map->fldrv = &cfi_intelext_chipdrv;
+	
+	return cfi_intelext_setup(mtd);
+}
+
+static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long offset = 0;
+	int i,j;
+	unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave;
+
+	//printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips);
+
+	mtd->size = devsize * cfi->numchips;
+
+	mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
+	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 
+			* mtd->numeraseregions, GFP_KERNEL);
+	if (!mtd->eraseregions) { 
+		printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n");
+		goto setup_err;
+	}
+	
+	for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
+		unsigned long ernum, ersize;
+		ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
+		ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1;
+
+		if (mtd->erasesize < ersize) {
+			mtd->erasesize = ersize;
+		}
+		for (j=0; j<cfi->numchips; j++) {
+			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;
+		}
+		offset += (ersize * ernum);
+	}
+
+	if (offset != devsize) {
+		/* Argh */
+		printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize);
+		goto setup_err;
+	}
+
+	for (i=0; i<mtd->numeraseregions;i++){
+		printk(KERN_DEBUG "%d: offset=0x%x,size=0x%x,blocks=%d\n",
+		       i,mtd->eraseregions[i].offset,
+		       mtd->eraseregions[i].erasesize,
+		       mtd->eraseregions[i].numblocks);
+	}
+
+#if 0
+	mtd->read_user_prot_reg = cfi_intelext_read_user_prot_reg;
+	mtd->read_fact_prot_reg = cfi_intelext_read_fact_prot_reg;
+#endif
+
+	/* This function has the potential to distort the reality
+	   a bit and therefore should be called last. */
+	if (cfi_intelext_partition_fixup(mtd, &cfi) != 0)
+		goto setup_err;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+
+ setup_err:
+	if(mtd) {
+		if(mtd->eraseregions)
+			kfree(mtd->eraseregions);
+		kfree(mtd);
+	}
+	kfree(cfi->cmdset_priv);
+	return NULL;
+}
+
+static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
+					struct cfi_private **pcfi)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = *pcfi;
+	struct cfi_pri_intelext *extp = cfi->cmdset_priv;
+
+	/*
+	 * Probing of multi-partition flash ships.
+	 *
+	 * To support multiple partitions when available, we simply arrange
+	 * for each of them to have their own flchip structure even if they
+	 * are on the same physical chip.  This means completely recreating
+	 * a new cfi_private structure right here which is a blatent code
+	 * layering violation, but this is still the least intrusive
+	 * arrangement at this point. This can be rearranged in the future
+	 * if someone feels motivated enough.  --nico
+	 */
+	if (extp && extp->MajorVersion == '1' && extp->MinorVersion == '3'
+	    && extp->FeatureSupport & (1 << 9)) {
+		struct cfi_private *newcfi;
+		struct flchip *chip;
+		struct flchip_shared *shared;
+		int offs, numregions, numparts, partshift, numvirtchips, i, j;
+
+		/* Protection Register info */
+		offs = (extp->NumProtectionFields - 1) * (4 + 6);
+
+		/* Burst Read info */
+		offs += 6;
+
+		/* Number of partition regions */
+		numregions = extp->extra[offs];
+		offs += 1;
+
+		/* Number of hardware partitions */
+		numparts = 0;
+		for (i = 0; i < numregions; i++) {
+			struct cfi_intelext_regioninfo *rinfo;
+			rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[offs];
+			numparts += rinfo->NumIdentPartitions;
+			offs += sizeof(*rinfo)
+				+ (rinfo->NumBlockTypes - 1) *
+				  sizeof(struct cfi_intelext_blockinfo);
+		}
+
+		/*
+		 * All functions below currently rely on all chips having
+		 * the same geometry so we'll just assume that all hardware
+		 * partitions are of the same size too.
+		 */
+		partshift = cfi->chipshift - __ffs(numparts);
+
+		if ((1 << partshift) < mtd->erasesize) {
+			printk( KERN_ERR
+				"%s: bad number of hw partitions (%d)\n",
+				__FUNCTION__, numparts);
+			return -EINVAL;
+		}
+
+		numvirtchips = cfi->numchips * numparts;
+		newcfi = kmalloc(sizeof(struct cfi_private) + numvirtchips * sizeof(struct flchip), GFP_KERNEL);
+		if (!newcfi)
+			return -ENOMEM;
+		shared = kmalloc(sizeof(struct flchip_shared) * cfi->numchips, GFP_KERNEL);
+		if (!shared) {
+			kfree(newcfi);
+			return -ENOMEM;
+		}
+		memcpy(newcfi, cfi, sizeof(struct cfi_private));
+		newcfi->numchips = numvirtchips;
+		newcfi->chipshift = partshift;
+
+		chip = &newcfi->chips[0];
+		for (i = 0; i < cfi->numchips; i++) {
+			shared[i].writing = shared[i].erasing = NULL;
+			spin_lock_init(&shared[i].lock);
+			for (j = 0; j < numparts; j++) {
+				*chip = cfi->chips[i];
+				chip->start += j << partshift;
+				chip->priv = &shared[i];
+				/* those should be reset too since
+				   they create memory references. */
+				init_waitqueue_head(&chip->wq);
+				spin_lock_init(&chip->_spinlock);
+				chip->mutex = &chip->_spinlock;
+				chip++;
+			}
+		}
+
+		printk(KERN_DEBUG "%s: %d set(s) of %d interleaved chips "
+				  "--> %d partitions of %d KiB\n",
+				  map->name, cfi->numchips, cfi->interleave,
+				  newcfi->numchips, 1<<(newcfi->chipshift-10));
+
+		map->fldrv_priv = newcfi;
+		*pcfi = newcfi;
+		kfree(cfi);
+	}
+
+	return 0;
+}
+
+/*
+ *  *********** CHIP ACCESS FUNCTIONS ***********
+ */
+
+static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK = CMD(0x80), status_PWS = CMD(0x01);
+	unsigned long timeo;
+	struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
+
+ resettime:
+	timeo = jiffies + HZ;
+ retry:
+	if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING)) {
+		/*
+		 * OK. We have possibility for contension on the write/erase
+		 * operations which are global to the real chip and not per
+		 * partition.  So let's fight it over in the partition which
+		 * currently has authority on the operation.
+		 *
+		 * The rules are as follows:
+		 *
+		 * - any write operation must own shared->writing.
+		 *
+		 * - any erase operation must own _both_ shared->writing and
+		 *   shared->erasing.
+		 *
+		 * - contension arbitration is handled in the owner's context.
+		 *
+		 * The 'shared' struct can be read when its lock is taken.
+		 * However any writes to it can only be made when the current
+		 * owner's lock is also held.
+		 */
+		struct flchip_shared *shared = chip->priv;
+		struct flchip *contender;
+		spin_lock(&shared->lock);
+		contender = shared->writing;
+		if (contender && contender != chip) {
+			/*
+			 * The engine to perform desired operation on this
+			 * partition is already in use by someone else.
+			 * Let's fight over it in the context of the chip
+			 * currently using it.  If it is possible to suspend,
+			 * that other partition will do just that, otherwise
+			 * it'll happily send us to sleep.  In any case, when
+			 * get_chip returns success we're clear to go ahead.
+			 */
+			int ret = spin_trylock(contender->mutex);
+			spin_unlock(&shared->lock);
+			if (!ret)
+				goto retry;
+			spin_unlock(chip->mutex);
+			ret = get_chip(map, contender, contender->start, mode);
+			spin_lock(chip->mutex);
+			if (ret) {
+				spin_unlock(contender->mutex);
+				return ret;
+			}
+			timeo = jiffies + HZ;
+			spin_lock(&shared->lock);
+		}
+
+		/* We now own it */
+		shared->writing = chip;
+		if (mode == FL_ERASING)
+			shared->erasing = chip;
+		if (contender && contender != chip)
+			spin_unlock(contender->mutex);
+		spin_unlock(&shared->lock);
+	}
+
+	switch (chip->state) {
+
+	case FL_STATUS:
+		for (;;) {
+			status = map_read(map, adr);
+			if (map_word_andequal(map, status, status_OK, status_OK))
+				break;
+
+			/* At this point we're fine with write operations
+			   in other partitions as they don't conflict. */
+			if (chip->priv && map_word_andequal(map, status, status_PWS, status_PWS))
+				break;
+
+			if (time_after(jiffies, timeo)) {
+				printk(KERN_ERR "Waiting for chip to be ready timed out. Status %lx\n", 
+				       status.x[0]);
+				return -EIO;
+			}
+			spin_unlock(chip->mutex);
+			cfi_udelay(1);
+			spin_lock(chip->mutex);
+			/* Someone else might have been playing with it. */
+			goto retry;
+		}
+				
+	case FL_READY:
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+		return 0;
+
+	case FL_ERASING:
+		if (!cfip ||
+		    !(cfip->FeatureSupport & 2) ||
+		    !(mode == FL_READY || mode == FL_POINT ||
+		     (mode == FL_WRITING && (cfip->SuspendCmdSupport & 1))))
+			goto sleep;
+
+
+		/* Erase suspend */
+		map_write(map, CMD(0xB0), adr);
+
+		/* If the flash has finished erasing, then 'erase suspend'
+		 * appears to make some (28F320) flash devices switch to
+		 * 'read' mode.  Make sure that we switch to 'read status'
+		 * mode so we get the right data. --rmk
+		 */
+		map_write(map, CMD(0x70), adr);
+		chip->oldstate = FL_ERASING;
+		chip->state = FL_ERASE_SUSPENDING;
+		chip->erase_suspended = 1;
+		for (;;) {
+			status = map_read(map, adr);
+			if (map_word_andequal(map, status, status_OK, status_OK))
+			        break;
+
+			if (time_after(jiffies, timeo)) {
+				/* Urgh. Resume and pretend we weren't here.  */
+				map_write(map, CMD(0xd0), adr);
+				/* Make sure we're in 'read status' mode if it had finished */
+				map_write(map, CMD(0x70), adr);
+				chip->state = FL_ERASING;
+				chip->oldstate = FL_READY;
+				printk(KERN_ERR "Chip not ready after erase "
+				       "suspended: status = 0x%lx\n", status.x[0]);
+				return -EIO;
+			}
+
+			spin_unlock(chip->mutex);
+			cfi_udelay(1);
+			spin_lock(chip->mutex);
+			/* Nobody will touch it while it's in state FL_ERASE_SUSPENDING.
+			   So we can just loop here. */
+		}
+		chip->state = FL_STATUS;
+		return 0;
+
+	case FL_XIP_WHILE_ERASING:
+		if (mode != FL_READY && mode != FL_POINT &&
+		    (mode != FL_WRITING || !cfip || !(cfip->SuspendCmdSupport&1)))
+			goto sleep;
+		chip->oldstate = chip->state;
+		chip->state = FL_READY;
+		return 0;
+
+	case FL_POINT:
+		/* Only if there's no operation suspended... */
+		if (mode == FL_READY && chip->oldstate == FL_READY)
+			return 0;
+
+	default:
+	sleep:
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		spin_unlock(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		spin_lock(chip->mutex);
+		goto resettime;
+	}
+}
+
+static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+
+	if (chip->priv) {
+		struct flchip_shared *shared = chip->priv;
+		spin_lock(&shared->lock);
+		if (shared->writing == chip && chip->oldstate == FL_READY) {
+			/* We own the ability to write, but we're done */
+			shared->writing = shared->erasing;
+			if (shared->writing && shared->writing != chip) {
+				/* give back ownership to who we loaned it from */
+				struct flchip *loaner = shared->writing;
+				spin_lock(loaner->mutex);
+				spin_unlock(&shared->lock);
+				spin_unlock(chip->mutex);
+				put_chip(map, loaner, loaner->start);
+				spin_lock(chip->mutex);
+				spin_unlock(loaner->mutex);
+				wake_up(&chip->wq);
+				return;
+			}
+			shared->erasing = NULL;
+			shared->writing = NULL;
+		} else if (shared->erasing == chip && shared->writing != chip) {
+			/*
+			 * We own the ability to erase without the ability
+			 * to write, which means the erase was suspended
+			 * and some other partition is currently writing.
+			 * Don't let the switch below mess things up since
+			 * we don't have ownership to resume anything.
+			 */
+			spin_unlock(&shared->lock);
+			wake_up(&chip->wq);
+			return;
+		}
+		spin_unlock(&shared->lock);
+	}
+
+	switch(chip->oldstate) {
+	case FL_ERASING:
+		chip->state = chip->oldstate;
+		/* What if one interleaved chip has finished and the 
+		   other hasn't? The old code would leave the finished
+		   one in READY mode. That's bad, and caused -EROFS 
+		   errors to be returned from do_erase_oneblock because
+		   that's the only bit it checked for at the time.
+		   As the state machine appears to explicitly allow 
+		   sending the 0x70 (Read Status) command to an erasing
+		   chip and expecting it to be ignored, that's what we 
+		   do. */
+		map_write(map, CMD(0xd0), adr);
+		map_write(map, CMD(0x70), adr);
+		chip->oldstate = FL_READY;
+		chip->state = FL_ERASING;
+		break;
+
+	case FL_XIP_WHILE_ERASING:
+		chip->state = chip->oldstate;
+		chip->oldstate = FL_READY;
+		break;
+
+	case FL_READY:
+	case FL_STATUS:
+	case FL_JEDEC_QUERY:
+		/* We should really make set_vpp() count, rather than doing this */
+		DISABLE_VPP(map);
+		break;
+	default:
+		printk(KERN_ERR "put_chip() called with oldstate %d!!\n", chip->oldstate);
+	}
+	wake_up(&chip->wq);
+}
+
+#ifdef CONFIG_MTD_XIP
+
+/*
+ * No interrupt what so ever can be serviced while the flash isn't in array
+ * mode.  This is ensured by the xip_disable() and xip_enable() functions
+ * enclosing any code path where the flash is known not to be in array mode.
+ * And within a XIP disabled code path, only functions marked with __xipram
+ * may be called and nothing else (it's a good thing to inspect generated
+ * assembly to make sure inline functions were actually inlined and that gcc
+ * didn't emit calls to its own support functions). Also configuring MTD CFI
+ * support to a single buswidth and a single interleave is also recommended.
+ * Note that not only IRQs are disabled but the preemption count is also
+ * increased to prevent other locking primitives (namely spin_unlock) from
+ * decrementing the preempt count to zero and scheduling the CPU away while
+ * not in array mode.
+ */
+
+static void xip_disable(struct map_info *map, struct flchip *chip,
+			unsigned long adr)
+{
+	/* TODO: chips with no XIP use should ignore and return */
+	(void) map_read(map, adr); /* ensure mmu mapping is up to date */
+	preempt_disable();
+	local_irq_disable();
+}
+
+static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
+				unsigned long adr)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	if (chip->state != FL_POINT && chip->state != FL_READY) {
+		map_write(map, CMD(0xff), adr);
+		chip->state = FL_READY;
+	}
+	(void) map_read(map, adr);
+	asm volatile (".rep 8; nop; .endr"); /* fill instruction prefetch */
+	local_irq_enable();
+	preempt_enable();
+}
+
+/*
+ * When a delay is required for the flash operation to complete, the
+ * xip_udelay() function is polling for both the given timeout and pending
+ * (but still masked) hardware interrupts.  Whenever there is an interrupt
+ * pending then the flash erase or write operation is suspended, array mode
+ * restored and interrupts unmasked.  Task scheduling might also happen at that
+ * point.  The CPU eventually returns from the interrupt or the call to
+ * schedule() and the suspended flash operation is resumed for the remaining
+ * of the delay period.
+ *
+ * Warning: this function _will_ fool interrupt latency tracing tools.
+ */
+
+static void __xipram xip_udelay(struct map_info *map, struct flchip *chip,
+				unsigned long adr, int usec)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
+	map_word status, OK = CMD(0x80);
+	unsigned long suspended, start = xip_currtime();
+	flstate_t oldstate, newstate;
+
+	do {
+		cpu_relax();
+		if (xip_irqpending() && cfip &&
+		    ((chip->state == FL_ERASING && (cfip->FeatureSupport&2)) ||
+		     (chip->state == FL_WRITING && (cfip->FeatureSupport&4))) &&
+		    (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) {
+			/*
+			 * Let's suspend the erase or write operation when
+			 * supported.  Note that we currently don't try to
+			 * suspend interleaved chips if there is already
+			 * another operation suspended (imagine what happens
+			 * when one chip was already done with the current
+			 * operation while another chip suspended it, then
+			 * we resume the whole thing at once).  Yes, it
+			 * can happen!
+			 */
+			map_write(map, CMD(0xb0), adr);
+			map_write(map, CMD(0x70), adr);
+			usec -= xip_elapsed_since(start);
+			suspended = xip_currtime();
+			do {
+				if (xip_elapsed_since(suspended) > 100000) {
+					/*
+					 * The chip doesn't want to suspend
+					 * after waiting for 100 msecs.
+					 * This is a critical error but there
+					 * is not much we can do here.
+					 */
+					return;
+				}
+				status = map_read(map, adr);
+			} while (!map_word_andequal(map, status, OK, OK));
+
+			/* Suspend succeeded */
+			oldstate = chip->state;
+			if (oldstate == FL_ERASING) {
+				if (!map_word_bitsset(map, status, CMD(0x40)))
+					break;
+				newstate = FL_XIP_WHILE_ERASING;
+				chip->erase_suspended = 1;
+			} else {
+				if (!map_word_bitsset(map, status, CMD(0x04)))
+					break;
+				newstate = FL_XIP_WHILE_WRITING;
+				chip->write_suspended = 1;
+			}
+			chip->state = newstate;
+			map_write(map, CMD(0xff), adr);
+			(void) map_read(map, adr);
+			asm volatile (".rep 8; nop; .endr");
+			local_irq_enable();
+			preempt_enable();
+			asm volatile (".rep 8; nop; .endr");
+			cond_resched();
+
+			/*
+			 * We're back.  However someone else might have
+			 * decided to go write to the chip if we are in
+			 * a suspended erase state.  If so let's wait
+			 * until it's done.
+			 */
+			preempt_disable();
+			while (chip->state != newstate) {
+				DECLARE_WAITQUEUE(wait, current);
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				add_wait_queue(&chip->wq, &wait);
+				preempt_enable();
+				schedule();
+				remove_wait_queue(&chip->wq, &wait);
+				preempt_disable();
+			}
+			/* Disallow XIP again */
+			local_irq_disable();
+
+			/* Resume the write or erase operation */
+			map_write(map, CMD(0xd0), adr);
+			map_write(map, CMD(0x70), adr);
+			chip->state = oldstate;
+			start = xip_currtime();
+		} else if (usec >= 1000000/HZ) {
+			/*
+			 * Try to save on CPU power when waiting delay
+			 * is at least a system timer tick period.
+			 * No need to be extremely accurate here.
+			 */
+			xip_cpu_idle();
+		}
+		status = map_read(map, adr);
+	} while (!map_word_andequal(map, status, OK, OK)
+		 && xip_elapsed_since(start) < usec);
+}
+
+#define UDELAY(map, chip, adr, usec)  xip_udelay(map, chip, adr, usec)
+
+/*
+ * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while
+ * the flash is actively programming or erasing since we have to poll for
+ * the operation to complete anyway.  We can't do that in a generic way with
+ * a XIP setup so do it before the actual flash operation in this case.
+ */
+#undef INVALIDATE_CACHED_RANGE
+#define INVALIDATE_CACHED_RANGE(x...)
+#define XIP_INVAL_CACHED_RANGE(map, from, size) \
+	do { if(map->inval_cache) map->inval_cache(map, from, size); } while(0)
+
+/*
+ * Extra notes:
+ *
+ * Activating this XIP support changes the way the code works a bit.  For
+ * example the code to suspend the current process when concurrent access
+ * happens is never executed because xip_udelay() will always return with the
+ * same chip state as it was entered with.  This is why there is no care for
+ * the presence of add_wait_queue() or schedule() calls from within a couple
+ * xip_disable()'d  areas of code, like in do_erase_oneblock for example.
+ * The queueing and scheduling are always happening within xip_udelay().
+ *
+ * Similarly, get_chip() and put_chip() just happen to always be executed
+ * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state
+ * is in array mode, therefore never executing many cases therein and not
+ * causing any problem with XIP.
+ */
+
+#else
+
+#define xip_disable(map, chip, adr)
+#define xip_enable(map, chip, adr)
+
+#define UDELAY(map, chip, adr, usec)  cfi_udelay(usec)
+
+#define XIP_INVAL_CACHED_RANGE(x...)
+
+#endif
+
+static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t adr, size_t len)
+{
+	unsigned long cmd_addr;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret = 0;
+
+	adr += chip->start;
+
+	/* Ensure cmd read/writes are aligned. */ 
+	cmd_addr = adr & ~(map_bankwidth(map)-1); 
+
+	spin_lock(chip->mutex);
+
+	ret = get_chip(map, chip, cmd_addr, FL_POINT);
+
+	if (!ret) {
+		if (chip->state != FL_POINT && chip->state != FL_READY)
+			map_write(map, CMD(0xff), cmd_addr);
+
+		chip->state = FL_POINT;
+		chip->ref_point_counter++;
+	}
+	spin_unlock(chip->mutex);
+
+	return ret;
+}
+
+static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+	int ret = 0;
+
+	if (!map->virt || (from + len > mtd->size))
+		return -EINVAL;
+	
+	*mtdbuf = (void *)map->virt + from;
+	*retlen = 0;
+
+	/* Now lock the chip(s) to POINT state */
+
+	/* ofs: offset within the first chip that the first read should start */
+	chipnum = (from >> cfi->chipshift);
+	ofs = from - (chipnum << cfi->chipshift);
+
+	while (len) {
+		unsigned long thislen;
+
+		if (chipnum >= cfi->numchips)
+			break;
+
+		if ((len + ofs -1) >> cfi->chipshift)
+			thislen = (1<<cfi->chipshift) - ofs;
+		else
+			thislen = len;
+
+		ret = do_point_onechip(map, &cfi->chips[chipnum], ofs, thislen);
+		if (ret)
+			break;
+
+		*retlen += thislen;
+		len -= thislen;
+		
+		ofs = 0;
+		chipnum++;
+	}
+	return 0;
+}
+
+static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+
+	/* Now unlock the chip(s) POINT state */
+
+	/* ofs: offset within the first chip that the first read should start */
+	chipnum = (from >> cfi->chipshift);
+	ofs = from - (chipnum <<  cfi->chipshift);
+
+	while (len) {
+		unsigned long thislen;
+		struct flchip *chip;
+
+		chip = &cfi->chips[chipnum];
+		if (chipnum >= cfi->numchips)
+			break;
+
+		if ((len + ofs -1) >> cfi->chipshift)
+			thislen = (1<<cfi->chipshift) - ofs;
+		else
+			thislen = len;
+
+		spin_lock(chip->mutex);
+		if (chip->state == FL_POINT) {
+			chip->ref_point_counter--;
+			if(chip->ref_point_counter == 0)
+				chip->state = FL_READY;
+		} else
+			printk(KERN_ERR "Warning: unpoint called on non pointed region\n"); /* Should this give an error? */
+
+		put_chip(map, chip, chip->start);
+		spin_unlock(chip->mutex);
+
+		len -= thislen;
+		ofs = 0;
+		chipnum++;
+	}
+}
+
+static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
+{
+	unsigned long cmd_addr;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret;
+
+	adr += chip->start;
+
+	/* Ensure cmd read/writes are aligned. */ 
+	cmd_addr = adr & ~(map_bankwidth(map)-1); 
+
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, cmd_addr, FL_READY);
+	if (ret) {
+		spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	if (chip->state != FL_POINT && chip->state != FL_READY) {
+		map_write(map, CMD(0xff), cmd_addr);
+
+		chip->state = FL_READY;
+	}
+
+	map_copy_from(map, buf, adr, len);
+
+	put_chip(map, chip, cmd_addr);
+
+	spin_unlock(chip->mutex);
+	return 0;
+}
+
+static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+	int ret = 0;
+
+	/* ofs: offset within the first chip that the first read should start */
+	chipnum = (from >> cfi->chipshift);
+	ofs = from - (chipnum <<  cfi->chipshift);
+
+	*retlen = 0;
+
+	while (len) {
+		unsigned long thislen;
+
+		if (chipnum >= cfi->numchips)
+			break;
+
+		if ((len + ofs -1) >> cfi->chipshift)
+			thislen = (1<<cfi->chipshift) - ofs;
+		else
+			thislen = len;
+
+		ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
+		if (ret)
+			break;
+
+		*retlen += thislen;
+		len -= thislen;
+		buf += thislen;
+		
+		ofs = 0;
+		chipnum++;
+	}
+	return ret;
+}
+
+#if 0
+static int __xipram cfi_intelext_read_prot_reg (struct mtd_info *mtd,
+						loff_t from, size_t len,
+						size_t *retlen,
+						u_char *buf,
+						int base_offst, int reg_sz)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_intelext *extp = cfi->cmdset_priv;
+	struct flchip *chip;
+	int ofs_factor = cfi->interleave * cfi->device_type;
+	int count = len;
+	int chip_num, offst;
+	int ret;
+
+	chip_num = ((unsigned int)from/reg_sz);
+	offst = from - (reg_sz*chip_num)+base_offst;
+
+	while (count) {
+	/* Calculate which chip & protection register offset we need */
+
+		if (chip_num >= cfi->numchips)
+			goto out;
+
+		chip = &cfi->chips[chip_num];
+		
+		spin_lock(chip->mutex);
+		ret = get_chip(map, chip, chip->start, FL_JEDEC_QUERY);
+		if (ret) {
+			spin_unlock(chip->mutex);
+			return (len-count)?:ret;
+		}
+
+		xip_disable(map, chip, chip->start);
+
+		if (chip->state != FL_JEDEC_QUERY) {
+			map_write(map, CMD(0x90), chip->start);
+			chip->state = FL_JEDEC_QUERY;
+		}
+
+		while (count && ((offst-base_offst) < reg_sz)) {
+			*buf = map_read8(map,(chip->start+((extp->ProtRegAddr+1)*ofs_factor)+offst));
+			buf++;
+			offst++;
+			count--;
+		}
+
+		xip_enable(map, chip, chip->start);
+		put_chip(map, chip, chip->start);
+		spin_unlock(chip->mutex);
+
+		/* Move on to the next chip */
+		chip_num++;
+		offst = base_offst;
+	}
+	
+ out:	
+	return len-count;
+}
+	
+static int cfi_intelext_read_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_intelext *extp=cfi->cmdset_priv;
+	int base_offst,reg_sz;
+	
+	/* Check that we actually have some protection registers */
+	if(!extp || !(extp->FeatureSupport&64)){
+		printk(KERN_WARNING "%s: This flash device has no protection data to read!\n",map->name);
+		return 0;
+	}
+
+	base_offst=(1<<extp->FactProtRegSize);
+	reg_sz=(1<<extp->UserProtRegSize);
+
+	return cfi_intelext_read_prot_reg(mtd, from, len, retlen, buf, base_offst, reg_sz);
+}
+
+static int cfi_intelext_read_fact_prot_reg (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_intelext *extp=cfi->cmdset_priv;
+	int base_offst,reg_sz;
+	
+	/* Check that we actually have some protection registers */
+	if(!extp || !(extp->FeatureSupport&64)){
+		printk(KERN_WARNING "%s: This flash device has no protection data to read!\n",map->name);
+		return 0;
+	}
+
+	base_offst=0;
+	reg_sz=(1<<extp->FactProtRegSize);
+
+	return cfi_intelext_read_prot_reg(mtd, from, len, retlen, buf, base_offst, reg_sz);
+}
+#endif
+
+static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
+				     unsigned long adr, map_word datum)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long timeo;
+	int z, ret=0;
+
+	adr += chip->start;
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_WRITING);
+	if (ret) {
+		spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map));
+	ENABLE_VPP(map);
+	xip_disable(map, chip, adr);
+	map_write(map, CMD(0x40), adr);
+	map_write(map, datum, adr);
+	chip->state = FL_WRITING;
+
+	spin_unlock(chip->mutex);
+	INVALIDATE_CACHED_RANGE(map, adr, map_bankwidth(map));
+	UDELAY(map, chip, adr, chip->word_write_time);
+	spin_lock(chip->mutex);
+
+	timeo = jiffies + (HZ/2);
+	z = 0;
+	for (;;) {
+		if (chip->state != FL_WRITING) {
+			/* Someone's suspended the write. Sleep */
+			DECLARE_WAITQUEUE(wait, current);
+
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			timeo = jiffies + (HZ / 2); /* FIXME */
+			spin_lock(chip->mutex);
+			continue;
+		}
+
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			chip->state = FL_STATUS;
+			xip_enable(map, chip, adr);
+			printk(KERN_ERR "waiting for chip to be ready timed out in word write\n");
+			ret = -EIO;
+			goto out;
+		}
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock(chip->mutex);
+		z++;
+		UDELAY(map, chip, adr, 1);
+		spin_lock(chip->mutex);
+	}
+	if (!z) {
+		chip->word_write_time--;
+		if (!chip->word_write_time)
+			chip->word_write_time++;
+	}
+	if (z > 1) 
+		chip->word_write_time++;
+
+	/* Done and happy. */
+	chip->state = FL_STATUS;
+
+	/* check for lock bit */
+	if (map_word_bitsset(map, status, CMD(0x02))) {
+		/* clear status */
+		map_write(map, CMD(0x50), adr);
+		/* put back into read status register mode */
+		map_write(map, CMD(0x70), adr);
+		ret = -EROFS;
+	}
+
+	xip_enable(map, chip, adr);
+ out:	put_chip(map, chip, adr);
+	spin_unlock(chip->mutex);
+
+	return ret;
+}
+
+
+static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret = 0;
+	int chipnum;
+	unsigned long ofs;
+
+	*retlen = 0;
+	if (!len)
+		return 0;
+
+	chipnum = to >> cfi->chipshift;
+	ofs = to  - (chipnum << cfi->chipshift);
+
+	/* If it's not bus-aligned, do the first byte write */
+	if (ofs & (map_bankwidth(map)-1)) {
+		unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1);
+		int gap = ofs - bus_ofs;
+		int n;
+		map_word datum;
+
+		n = min_t(int, len, map_bankwidth(map)-gap);
+		datum = map_word_ff(map);
+		datum = map_word_load_partial(map, datum, buf, gap, n);
+
+		ret = do_write_oneword(map, &cfi->chips[chipnum],
+					       bus_ofs, datum);
+		if (ret) 
+			return ret;
+
+		len -= n;
+		ofs += n;
+		buf += n;
+		(*retlen) += n;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+	
+	while(len >= map_bankwidth(map)) {
+		map_word datum = map_word_load(map, buf);
+
+		ret = do_write_oneword(map, &cfi->chips[chipnum],
+				ofs, datum);
+		if (ret)
+			return ret;
+
+		ofs += map_bankwidth(map);
+		buf += map_bankwidth(map);
+		(*retlen) += map_bankwidth(map);
+		len -= map_bankwidth(map);
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+
+	if (len & (map_bankwidth(map)-1)) {
+		map_word datum;
+
+		datum = map_word_ff(map);
+		datum = map_word_load_partial(map, datum, buf, 0, len);
+
+		ret = do_write_oneword(map, &cfi->chips[chipnum],
+					       ofs, datum);
+		if (ret) 
+			return ret;
+		
+		(*retlen) += len;
+	}
+
+	return 0;
+}
+
+
+static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, 
+				    unsigned long adr, const u_char *buf, int len)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long cmd_adr, timeo;
+	int wbufsize, z, ret=0, bytes, words;
+
+	wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
+	adr += chip->start;
+	cmd_adr = adr & ~(wbufsize-1);
+	
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, cmd_adr, FL_WRITING);
+	if (ret) {
+		spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	XIP_INVAL_CACHED_RANGE(map, adr, len);
+	ENABLE_VPP(map);
+	xip_disable(map, chip, cmd_adr);
+
+	/* §4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set
+	   [...], the device will not accept any more Write to Buffer commands". 
+	   So we must check here and reset those bits if they're set. Otherwise
+	   we're just pissing in the wind */
+	if (chip->state != FL_STATUS)
+		map_write(map, CMD(0x70), cmd_adr);
+	status = map_read(map, cmd_adr);
+	if (map_word_bitsset(map, status, CMD(0x30))) {
+		xip_enable(map, chip, cmd_adr);
+		printk(KERN_WARNING "SR.4 or SR.5 bits set in buffer write (status %lx). Clearing.\n", status.x[0]);
+		xip_disable(map, chip, cmd_adr);
+		map_write(map, CMD(0x50), cmd_adr);
+		map_write(map, CMD(0x70), cmd_adr);
+	}
+
+	chip->state = FL_WRITING_TO_BUFFER;
+
+	z = 0;
+	for (;;) {
+		map_write(map, CMD(0xe8), cmd_adr);
+
+		status = map_read(map, cmd_adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+
+		spin_unlock(chip->mutex);
+		UDELAY(map, chip, cmd_adr, 1);
+		spin_lock(chip->mutex);
+
+		if (++z > 20) {
+			/* Argh. Not ready for write to buffer */
+			map_word Xstatus;
+			map_write(map, CMD(0x70), cmd_adr);
+			chip->state = FL_STATUS;
+			Xstatus = map_read(map, cmd_adr);
+			/* Odd. Clear status bits */
+			map_write(map, CMD(0x50), cmd_adr);
+			map_write(map, CMD(0x70), cmd_adr);
+			xip_enable(map, chip, cmd_adr);
+			printk(KERN_ERR "Chip not ready for buffer write. status = %lx, Xstatus = %lx\n",
+			       status.x[0], Xstatus.x[0]);
+			ret = -EIO;
+			goto out;
+		}
+	}
+
+	/* Write length of data to come */
+	bytes = len & (map_bankwidth(map)-1);
+	words = len / map_bankwidth(map);
+	map_write(map, CMD(words - !bytes), cmd_adr );
+
+	/* Write data */
+	z = 0;
+	while(z < words * map_bankwidth(map)) {
+		map_word datum = map_word_load(map, buf);
+		map_write(map, datum, adr+z);
+
+		z += map_bankwidth(map);
+		buf += map_bankwidth(map);
+	}
+
+	if (bytes) {
+		map_word datum;
+
+		datum = map_word_ff(map);
+		datum = map_word_load_partial(map, datum, buf, 0, bytes);
+		map_write(map, datum, adr+z);
+	}
+
+	/* GO GO GO */
+	map_write(map, CMD(0xd0), cmd_adr);
+	chip->state = FL_WRITING;
+
+	spin_unlock(chip->mutex);
+	INVALIDATE_CACHED_RANGE(map, adr, len);
+	UDELAY(map, chip, cmd_adr, chip->buffer_write_time);
+	spin_lock(chip->mutex);
+
+	timeo = jiffies + (HZ/2);
+	z = 0;
+	for (;;) {
+		if (chip->state != FL_WRITING) {
+			/* Someone's suspended the write. Sleep */
+			DECLARE_WAITQUEUE(wait, current);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			timeo = jiffies + (HZ / 2); /* FIXME */
+			spin_lock(chip->mutex);
+			continue;
+		}
+
+		status = map_read(map, cmd_adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			chip->state = FL_STATUS;
+			xip_enable(map, chip, cmd_adr);
+			printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n");
+			ret = -EIO;
+			goto out;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock(chip->mutex);
+		UDELAY(map, chip, cmd_adr, 1);
+		z++;
+		spin_lock(chip->mutex);
+	}
+	if (!z) {
+		chip->buffer_write_time--;
+		if (!chip->buffer_write_time)
+			chip->buffer_write_time++;
+	}
+	if (z > 1) 
+		chip->buffer_write_time++;
+
+	/* Done and happy. */
+ 	chip->state = FL_STATUS;
+
+	/* check for lock bit */
+	if (map_word_bitsset(map, status, CMD(0x02))) {
+		/* clear status */
+		map_write(map, CMD(0x50), cmd_adr);
+		/* put back into read status register mode */
+		map_write(map, CMD(0x70), adr);
+		ret = -EROFS;
+	}
+
+	xip_enable(map, chip, cmd_adr);
+ out:	put_chip(map, chip, cmd_adr);
+	spin_unlock(chip->mutex);
+	return ret;
+}
+
+static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, 
+				       size_t len, size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
+	int ret = 0;
+	int chipnum;
+	unsigned long ofs;
+
+	*retlen = 0;
+	if (!len)
+		return 0;
+
+	chipnum = to >> cfi->chipshift;
+	ofs = to  - (chipnum << cfi->chipshift);
+
+	/* If it's not bus-aligned, do the first word write */
+	if (ofs & (map_bankwidth(map)-1)) {
+		size_t local_len = (-ofs)&(map_bankwidth(map)-1);
+		if (local_len > len)
+			local_len = len;
+		ret = cfi_intelext_write_words(mtd, to, local_len,
+					       retlen, buf);
+		if (ret)
+			return ret;
+		ofs += local_len;
+		buf += local_len;
+		len -= local_len;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++;
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+
+	while(len) {
+		/* We must not cross write block boundaries */
+		int size = wbufsize - (ofs & (wbufsize-1));
+
+		if (size > len)
+			size = len;
+		ret = do_write_buffer(map, &cfi->chips[chipnum], 
+				      ofs, buf, size);
+		if (ret)
+			return ret;
+
+		ofs += size;
+		buf += size;
+		(*retlen) += size;
+		len -= size;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+	return 0;
+}
+
+static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
+				      unsigned long adr, int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long timeo;
+	int retries = 3;
+	DECLARE_WAITQUEUE(wait, current);
+	int ret = 0;
+
+	adr += chip->start;
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+ retry:
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_ERASING);
+	if (ret) {
+		spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	XIP_INVAL_CACHED_RANGE(map, adr, len);
+	ENABLE_VPP(map);
+	xip_disable(map, chip, adr);
+
+	/* Clear the status register first */
+	map_write(map, CMD(0x50), adr);
+
+	/* Now erase */
+	map_write(map, CMD(0x20), adr);
+	map_write(map, CMD(0xD0), adr);
+	chip->state = FL_ERASING;
+	chip->erase_suspended = 0;
+
+	spin_unlock(chip->mutex);
+	INVALIDATE_CACHED_RANGE(map, adr, len);
+	UDELAY(map, chip, adr, chip->erase_time*1000/2);
+	spin_lock(chip->mutex);
+
+	/* FIXME. Use a timer to check this, and return immediately. */
+	/* Once the state machine's known to be working I'll do that */
+
+	timeo = jiffies + (HZ*20);
+	for (;;) {
+		if (chip->state != FL_ERASING) {
+			/* Someone's suspended the erase. Sleep */
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			spin_lock(chip->mutex);
+			continue;
+		}
+		if (chip->erase_suspended) {
+			/* This erase was suspended and resumed.
+			   Adjust the timeout */
+			timeo = jiffies + (HZ*20); /* FIXME */
+			chip->erase_suspended = 0;
+		}
+
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			map_word Xstatus;
+			map_write(map, CMD(0x70), adr);
+			chip->state = FL_STATUS;
+			Xstatus = map_read(map, adr);
+			/* Clear status bits */
+			map_write(map, CMD(0x50), adr);
+			map_write(map, CMD(0x70), adr);
+			xip_enable(map, chip, adr);
+			printk(KERN_ERR "waiting for erase at %08lx to complete timed out. status = %lx, Xstatus = %lx.\n",
+			       adr, status.x[0], Xstatus.x[0]);
+			ret = -EIO;
+			goto out;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock(chip->mutex);
+		UDELAY(map, chip, adr, 1000000/HZ);
+		spin_lock(chip->mutex);
+	}
+
+	/* We've broken this before. It doesn't hurt to be safe */
+	map_write(map, CMD(0x70), adr);
+	chip->state = FL_STATUS;
+	status = map_read(map, adr);
+
+	/* check for lock bit */
+	if (map_word_bitsset(map, status, CMD(0x3a))) {
+		unsigned char chipstatus;
+
+		/* Reset the error bits */
+		map_write(map, CMD(0x50), adr);
+		map_write(map, CMD(0x70), adr);
+		xip_enable(map, chip, adr);
+
+		chipstatus = status.x[0];
+		if (!map_word_equal(map, status, CMD(chipstatus))) {
+			int i, w;
+			for (w=0; w<map_words(map); w++) {
+				for (i = 0; i<cfi_interleave(cfi); i++) {
+					chipstatus |= status.x[w] >> (cfi->device_type * 8);
+				}
+			}
+			printk(KERN_WARNING "Status is not identical for all chips: 0x%lx. Merging to give 0x%02x\n",
+			       status.x[0], chipstatus);
+		}
+
+		if ((chipstatus & 0x30) == 0x30) {
+			printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%x\n", chipstatus);
+			ret = -EIO;
+		} else if (chipstatus & 0x02) {
+			/* Protection bit set */
+			ret = -EROFS;
+		} else if (chipstatus & 0x8) {
+			/* Voltage */
+			printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%x\n", chipstatus);
+			ret = -EIO;
+		} else if (chipstatus & 0x20) {
+			if (retries--) {
+				printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus);
+				timeo = jiffies + HZ;
+				put_chip(map, chip, adr);
+				spin_unlock(chip->mutex);
+				goto retry;
+			}
+			printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus);
+			ret = -EIO;
+		}
+	} else {
+		xip_enable(map, chip, adr);
+		ret = 0;
+	}
+
+ out:	put_chip(map, chip, adr);
+	spin_unlock(chip->mutex);
+	return ret;
+}
+
+int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
+{
+	unsigned long ofs, len;
+	int ret;
+
+	ofs = instr->addr;
+	len = instr->len;
+
+	ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL);
+	if (ret)
+		return ret;
+
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+	
+	return 0;
+}
+
+static void cfi_intelext_sync (struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+
+	for (i=0; !ret && i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+
+		spin_lock(chip->mutex);
+		ret = get_chip(map, chip, chip->start, FL_SYNCING);
+
+		if (!ret) {
+			chip->oldstate = chip->state;
+			chip->state = FL_SYNCING;
+			/* No need to wake_up() on this state change - 
+			 * as the whole point is that nobody can do anything
+			 * with the chip now anyway.
+			 */
+		}
+		spin_unlock(chip->mutex);
+	}
+
+	/* Unlock the chips again */
+
+	for (i--; i >=0; i--) {
+		chip = &cfi->chips[i];
+
+		spin_lock(chip->mutex);
+		
+		if (chip->state == FL_SYNCING) {
+			chip->state = chip->oldstate;
+			wake_up(&chip->wq);
+		}
+		spin_unlock(chip->mutex);
+	}
+}
+
+#ifdef DEBUG_LOCK_BITS
+static int __xipram do_printlockstatus_oneblock(struct map_info *map,
+						struct flchip *chip,
+						unsigned long adr,
+						int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	int status, ofs_factor = cfi->interleave * cfi->device_type;
+
+	xip_disable(map, chip, adr+(2*ofs_factor));
+	cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL);
+	chip->state = FL_JEDEC_QUERY;
+	status = cfi_read_query(map, adr+(2*ofs_factor));
+	xip_enable(map, chip, 0);
+	printk(KERN_DEBUG "block status register for 0x%08lx is %x\n",
+	       adr, status);
+	return 0;
+}
+#endif
+
+#define DO_XXLOCK_ONEBLOCK_LOCK		((void *) 1)
+#define DO_XXLOCK_ONEBLOCK_UNLOCK	((void *) 2)
+
+static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip,
+				       unsigned long adr, int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long timeo = jiffies + HZ;
+	int ret;
+
+	adr += chip->start;
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_LOCKING);
+	if (ret) {
+		spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	ENABLE_VPP(map);
+	xip_disable(map, chip, adr);
+	
+	map_write(map, CMD(0x60), adr);
+	if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) {
+		map_write(map, CMD(0x01), adr);
+		chip->state = FL_LOCKING;
+	} else if (thunk == DO_XXLOCK_ONEBLOCK_UNLOCK) {
+		map_write(map, CMD(0xD0), adr);
+		chip->state = FL_UNLOCKING;
+	} else
+		BUG();
+
+	spin_unlock(chip->mutex);
+	UDELAY(map, chip, adr, 1000000/HZ);
+	spin_lock(chip->mutex);
+
+	/* FIXME. Use a timer to check this, and return immediately. */
+	/* Once the state machine's known to be working I'll do that */
+
+	timeo = jiffies + (HZ*20);
+	for (;;) {
+
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			map_word Xstatus;
+			map_write(map, CMD(0x70), adr);
+			chip->state = FL_STATUS;
+			Xstatus = map_read(map, adr);
+			xip_enable(map, chip, adr);
+			printk(KERN_ERR "waiting for unlock to complete timed out. status = %lx, Xstatus = %lx.\n",
+			       status.x[0], Xstatus.x[0]);
+			put_chip(map, chip, adr);
+			spin_unlock(chip->mutex);
+			return -EIO;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock(chip->mutex);
+		UDELAY(map, chip, adr, 1);
+		spin_lock(chip->mutex);
+	}
+	
+	/* Done and happy. */
+	chip->state = FL_STATUS;
+	xip_enable(map, chip, adr);
+	put_chip(map, chip, adr);
+	spin_unlock(chip->mutex);
+	return 0;
+}
+
+static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	int ret;
+
+#ifdef DEBUG_LOCK_BITS
+	printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n",
+	       __FUNCTION__, ofs, len);
+	cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
+		ofs, len, 0);
+#endif
+
+	ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, 
+		ofs, len, DO_XXLOCK_ONEBLOCK_LOCK);
+	
+#ifdef DEBUG_LOCK_BITS
+	printk(KERN_DEBUG "%s: lock status after, ret=%d\n",
+	       __FUNCTION__, ret);
+	cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
+		ofs, len, 0);
+#endif
+
+	return ret;
+}
+
+static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	int ret;
+
+#ifdef DEBUG_LOCK_BITS
+	printk(KERN_DEBUG "%s: lock status before, ofs=0x%08llx, len=0x%08X\n",
+	       __FUNCTION__, ofs, len);
+	cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
+		ofs, len, 0);
+#endif
+
+	ret = cfi_varsize_frob(mtd, do_xxlock_oneblock,
+					ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK);
+	
+#ifdef DEBUG_LOCK_BITS
+	printk(KERN_DEBUG "%s: lock status after, ret=%d\n",
+	       __FUNCTION__, ret);
+	cfi_varsize_frob(mtd, do_printlockstatus_oneblock, 
+		ofs, len, 0);
+#endif
+	
+	return ret;
+}
+
+static int cfi_intelext_suspend(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+
+	for (i=0; !ret && i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+
+		spin_lock(chip->mutex);
+
+		switch (chip->state) {
+		case FL_READY:
+		case FL_STATUS:
+		case FL_CFI_QUERY:
+		case FL_JEDEC_QUERY:
+			if (chip->oldstate == FL_READY) {
+				chip->oldstate = chip->state;
+				chip->state = FL_PM_SUSPENDED;
+				/* No need to wake_up() on this state change - 
+				 * as the whole point is that nobody can do anything
+				 * with the chip now anyway.
+				 */
+			} else {
+				/* There seems to be an operation pending. We must wait for it. */
+				printk(KERN_NOTICE "Flash device refused suspend due to pending operation (oldstate %d)\n", chip->oldstate);
+				ret = -EAGAIN;
+			}
+			break;
+		default:
+			/* Should we actually wait? Once upon a time these routines weren't
+			   allowed to. Or should we return -EAGAIN, because the upper layers
+			   ought to have already shut down anything which was using the device
+			   anyway? The latter for now. */
+			printk(KERN_NOTICE "Flash device refused suspend due to active operation (state %d)\n", chip->oldstate);
+			ret = -EAGAIN;
+		case FL_PM_SUSPENDED:
+			break;
+		}
+		spin_unlock(chip->mutex);
+	}
+
+	/* Unlock the chips again */
+
+	if (ret) {
+		for (i--; i >=0; i--) {
+			chip = &cfi->chips[i];
+			
+			spin_lock(chip->mutex);
+			
+			if (chip->state == FL_PM_SUSPENDED) {
+				/* No need to force it into a known state here,
+				   because we're returning failure, and it didn't
+				   get power cycled */
+				chip->state = chip->oldstate;
+				chip->oldstate = FL_READY;
+				wake_up(&chip->wq);
+			}
+			spin_unlock(chip->mutex);
+		}
+	} 
+	
+	return ret;
+}
+
+static void cfi_intelext_resume(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+
+	for (i=0; i<cfi->numchips; i++) {
+	
+		chip = &cfi->chips[i];
+
+		spin_lock(chip->mutex);
+		
+		/* Go to known state. Chip may have been power cycled */
+		if (chip->state == FL_PM_SUSPENDED) {
+			map_write(map, CMD(0xFF), cfi->chips[i].start);
+			chip->oldstate = chip->state = FL_READY;
+			wake_up(&chip->wq);
+		}
+
+		spin_unlock(chip->mutex);
+	}
+}
+
+static void cfi_intelext_destroy(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	kfree(cfi->cmdset_priv);
+	kfree(cfi->cfiq);
+	kfree(cfi->chips[0].priv);
+	kfree(cfi);
+	kfree(mtd->eraseregions);
+}
+
+static char im_name_1[]="cfi_cmdset_0001";
+static char im_name_3[]="cfi_cmdset_0003";
+
+static int __init cfi_intelext_init(void)
+{
+	inter_module_register(im_name_1, THIS_MODULE, &cfi_cmdset_0001);
+	inter_module_register(im_name_3, THIS_MODULE, &cfi_cmdset_0001);
+	return 0;
+}
+
+static void __exit cfi_intelext_exit(void)
+{
+	inter_module_unregister(im_name_1);
+	inter_module_unregister(im_name_3);
+}
+
+module_init(cfi_intelext_init);
+module_exit(cfi_intelext_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al.");
+MODULE_DESCRIPTION("MTD chip driver for Intel/Sharp flash chips");
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
new file mode 100644
index 000000000000..fca8ff6f7e14
--- /dev/null
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -0,0 +1,1515 @@
+/*
+ * Common Flash Interface support:
+ *   AMD & Fujitsu Standard Vendor Command Set (ID 0x0002)
+ *
+ * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp>
+ * Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com>
+ *
+ * 2_by_8 routines added by Simon Munton
+ *
+ * 4_by_16 work by Carolyn J. Smith
+ *
+ * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com
+ *
+ * This code is GPL
+ *
+ * $Id: cfi_cmdset_0002.c,v 1.114 2004/12/11 15:43:53 dedekind Exp $
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/cfi.h>
+
+#define AMD_BOOTLOC_BUG
+#define FORCE_WORD_WRITE 0
+
+#define MAX_WORD_RETRIES 3
+
+#define MANUFACTURER_AMD	0x0001
+#define MANUFACTURER_SST	0x00BF
+#define SST49LF004B	        0x0060
+
+static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *);
+static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *);
+static void cfi_amdstd_sync (struct mtd_info *);
+static int cfi_amdstd_suspend (struct mtd_info *);
+static void cfi_amdstd_resume (struct mtd_info *);
+static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+
+static void cfi_amdstd_destroy(struct mtd_info *);
+
+struct mtd_info *cfi_cmdset_0002(struct map_info *, int);
+static struct mtd_info *cfi_amdstd_setup (struct mtd_info *);
+
+static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
+static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr);
+#include "fwh_lock.h"
+
+static struct mtd_chip_driver cfi_amdstd_chipdrv = {
+	.probe		= NULL, /* Not usable directly */
+	.destroy	= cfi_amdstd_destroy,
+	.name		= "cfi_cmdset_0002",
+	.module		= THIS_MODULE
+};
+
+
+/* #define DEBUG_CFI_FEATURES */
+
+
+#ifdef DEBUG_CFI_FEATURES
+static void cfi_tell_features(struct cfi_pri_amdstd *extp)
+{
+	const char* erase_suspend[3] = {
+		"Not supported", "Read only", "Read/write"
+	};
+	const char* top_bottom[6] = {
+		"No WP", "8x8KiB sectors at top & bottom, no WP",
+		"Bottom boot", "Top boot",
+		"Uniform, Bottom WP", "Uniform, Top WP"
+	};
+
+	printk("  Silicon revision: %d\n", extp->SiliconRevision >> 1);
+	printk("  Address sensitive unlock: %s\n", 
+	       (extp->SiliconRevision & 1) ? "Not required" : "Required");
+
+	if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend))
+		printk("  Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]);
+	else
+		printk("  Erase Suspend: Unknown value %d\n", extp->EraseSuspend);
+
+	if (extp->BlkProt == 0)
+		printk("  Block protection: Not supported\n");
+	else
+		printk("  Block protection: %d sectors per group\n", extp->BlkProt);
+
+
+	printk("  Temporary block unprotect: %s\n",
+	       extp->TmpBlkUnprotect ? "Supported" : "Not supported");
+	printk("  Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot);
+	printk("  Number of simultaneous operations: %d\n", extp->SimultaneousOps);
+	printk("  Burst mode: %s\n",
+	       extp->BurstMode ? "Supported" : "Not supported");
+	if (extp->PageMode == 0)
+		printk("  Page mode: Not supported\n");
+	else
+		printk("  Page mode: %d word page\n", extp->PageMode << 2);
+
+	printk("  Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n", 
+	       extp->VppMin >> 4, extp->VppMin & 0xf);
+	printk("  Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n", 
+	       extp->VppMax >> 4, extp->VppMax & 0xf);
+
+	if (extp->TopBottom < ARRAY_SIZE(top_bottom))
+		printk("  Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]);
+	else
+		printk("  Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom);
+}
+#endif
+
+#ifdef AMD_BOOTLOC_BUG
+/* Wheee. Bring me the head of someone at AMD. */
+static void fixup_amd_bootblock(struct mtd_info *mtd, void* param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
+	__u8 major = extp->MajorVersion;
+	__u8 minor = extp->MinorVersion;
+
+	if (((major << 8) | minor) < 0x3131) {
+		/* CFI version 1.0 => don't trust bootloc */
+		if (cfi->id & 0x80) {
+			printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id);
+			extp->TopBottom = 3;	/* top boot */
+		} else {
+			extp->TopBottom = 2;	/* bottom boot */
+		}
+	}
+}
+#endif
+
+static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	if (cfi->cfiq->BufWriteTimeoutTyp) {
+		DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" );
+		mtd->write = cfi_amdstd_write_buffers;
+	}
+}
+
+static void fixup_use_secsi(struct mtd_info *mtd, void *param)
+{
+	/* Setup for chips with a secsi area */
+	mtd->read_user_prot_reg = cfi_amdstd_secsi_read;
+	mtd->read_fact_prot_reg = cfi_amdstd_secsi_read;
+}
+
+static void fixup_use_erase_chip(struct mtd_info *mtd, void *param)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	if ((cfi->cfiq->NumEraseRegions == 1) &&
+		((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) {
+		mtd->erase = cfi_amdstd_erase_chip;
+	}
+	
+}
+
+static struct cfi_fixup cfi_fixup_table[] = {
+#ifdef AMD_BOOTLOC_BUG
+	{ CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
+#endif
+	{ CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, },
+	{ CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, },
+	{ CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, },
+	{ CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, },
+	{ CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, },
+	{ CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, },
+#if !FORCE_WORD_WRITE
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
+#endif
+	{ 0, 0, NULL, NULL }
+};
+static struct cfi_fixup jedec_fixup_table[] = {
+	{ MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, },
+	{ 0, 0, NULL, NULL }
+};
+
+static struct cfi_fixup fixup_table[] = {
+	/* The CFI vendor ids and the JEDEC vendor IDs appear
+	 * to be common.  It is like the devices id's are as
+	 * well.  This table is to pick all cases where
+	 * we know that is the case.
+	 */
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL },
+	{ 0, 0, NULL, NULL }
+};
+
+
+struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct mtd_info *mtd;
+	int i;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd) {
+		printk(KERN_WARNING "Failed to allocate memory for MTD device\n");
+		return NULL;
+	}
+	memset(mtd, 0, sizeof(*mtd));
+	mtd->priv = map;
+	mtd->type = MTD_NORFLASH;
+
+	/* Fill in the default mtd operations */
+	mtd->erase   = cfi_amdstd_erase_varsize;
+	mtd->write   = cfi_amdstd_write_words;
+	mtd->read    = cfi_amdstd_read;
+	mtd->sync    = cfi_amdstd_sync;
+	mtd->suspend = cfi_amdstd_suspend;
+	mtd->resume  = cfi_amdstd_resume;
+	mtd->flags   = MTD_CAP_NORFLASH;
+	mtd->name    = map->name;
+
+	if (cfi->cfi_mode==CFI_MODE_CFI){
+		unsigned char bootloc;
+		/* 
+		 * It's a real CFI chip, not one for which the probe
+		 * routine faked a CFI structure. So we read the feature
+		 * table from it.
+		 */
+		__u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
+		struct cfi_pri_amdstd *extp;
+
+		extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu");
+		if (!extp) {
+			kfree(mtd);
+			return NULL;
+		}
+
+		/* Install our own private info structure */
+		cfi->cmdset_priv = extp;	
+
+		/* Apply cfi device specific fixups */
+		cfi_fixup(mtd, cfi_fixup_table);
+
+#ifdef DEBUG_CFI_FEATURES
+		/* Tell the user about it in lots of lovely detail */
+		cfi_tell_features(extp);
+#endif	
+
+		bootloc = extp->TopBottom;
+		if ((bootloc != 2) && (bootloc != 3)) {
+			printk(KERN_WARNING "%s: CFI does not contain boot "
+			       "bank location. Assuming top.\n", map->name);
+			bootloc = 2;
+		}
+
+		if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) {
+			printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name);
+			
+			for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) {
+				int j = (cfi->cfiq->NumEraseRegions-1)-i;
+				__u32 swap;
+				
+				swap = cfi->cfiq->EraseRegionInfo[i];
+				cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j];
+				cfi->cfiq->EraseRegionInfo[j] = swap;
+			}
+		}
+		/* Set the default CFI lock/unlock addresses */
+		cfi->addr_unlock1 = 0x555;
+		cfi->addr_unlock2 = 0x2aa;
+		/* Modify the unlock address if we are in compatibility mode */
+		if (	/* x16 in x8 mode */
+			((cfi->device_type == CFI_DEVICETYPE_X8) && 
+				(cfi->cfiq->InterfaceDesc == 2)) ||
+			/* x32 in x16 mode */
+			((cfi->device_type == CFI_DEVICETYPE_X16) &&
+				(cfi->cfiq->InterfaceDesc == 4))) 
+		{
+			cfi->addr_unlock1 = 0xaaa;
+			cfi->addr_unlock2 = 0x555;
+		}
+
+	} /* CFI mode */
+	else if (cfi->cfi_mode == CFI_MODE_JEDEC) {
+		/* Apply jedec specific fixups */
+		cfi_fixup(mtd, jedec_fixup_table);
+	}
+	/* Apply generic fixups */
+	cfi_fixup(mtd, fixup_table);
+
+	for (i=0; i< cfi->numchips; i++) {
+		cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp;
+		cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp;
+		cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp;
+	}		
+	
+	map->fldrv = &cfi_amdstd_chipdrv;
+	
+	return cfi_amdstd_setup(mtd);
+}
+
+
+static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave;
+	unsigned long offset = 0;
+	int i,j;
+
+	printk(KERN_NOTICE "number of %s chips: %d\n", 
+	       (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips);
+	/* Select the correct geometry setup */ 
+	mtd->size = devsize * cfi->numchips;
+
+	mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
+	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
+				    * mtd->numeraseregions, GFP_KERNEL);
+	if (!mtd->eraseregions) { 
+		printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n");
+		goto setup_err;
+	}
+			
+	for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
+		unsigned long ernum, ersize;
+		ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
+		ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1;
+			
+		if (mtd->erasesize < ersize) {
+			mtd->erasesize = ersize;
+		}
+		for (j=0; j<cfi->numchips; j++) {
+			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;
+		}
+		offset += (ersize * ernum);
+	}
+	if (offset != devsize) {
+		/* Argh */
+		printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize);
+		goto setup_err;
+	}
+#if 0
+	// debug
+	for (i=0; i<mtd->numeraseregions;i++){
+		printk("%d: offset=0x%x,size=0x%x,blocks=%d\n",
+		       i,mtd->eraseregions[i].offset,
+		       mtd->eraseregions[i].erasesize,
+		       mtd->eraseregions[i].numblocks);
+	}
+#endif
+
+	/* FIXME: erase-suspend-program is broken.  See
+	   http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */
+	printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n");
+
+	__module_get(THIS_MODULE);
+	return mtd;
+
+ setup_err:
+	if(mtd) {
+		if(mtd->eraseregions)
+			kfree(mtd->eraseregions);
+		kfree(mtd);
+	}
+	kfree(cfi->cmdset_priv);
+	kfree(cfi->cfiq);
+	return NULL;
+}
+
+/*
+ * Return true if the chip is ready.
+ *
+ * Ready is one of: read mode, query mode, erase-suspend-read mode (in any
+ * non-suspended sector) and is indicated by no toggle bits toggling.
+ *
+ * Note that anything more complicated than checking if no bits are toggling
+ * (including checking DQ5 for an error status) is tricky to get working
+ * correctly and is therefore not done	(particulary with interleaved chips
+ * as each chip must be checked independantly of the others).
+ */
+static int chip_ready(struct map_info *map, unsigned long addr)
+{
+	map_word d, t;
+
+	d = map_read(map, addr);
+	t = map_read(map, addr);
+
+	return map_word_equal(map, d, t);
+}
+
+static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long timeo;
+	struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv;
+
+ resettime:
+	timeo = jiffies + HZ;
+ retry:
+	switch (chip->state) {
+
+	case FL_STATUS:
+		for (;;) {
+			if (chip_ready(map, adr))
+				break;
+
+			if (time_after(jiffies, timeo)) {
+				printk(KERN_ERR "Waiting for chip to be ready timed out.\n");
+				cfi_spin_unlock(chip->mutex);
+				return -EIO;
+			}
+			cfi_spin_unlock(chip->mutex);
+			cfi_udelay(1);
+			cfi_spin_lock(chip->mutex);
+			/* Someone else might have been playing with it. */
+			goto retry;
+		}
+				
+	case FL_READY:
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+		return 0;
+
+	case FL_ERASING:
+		if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */
+			goto sleep;
+
+		if (!(mode == FL_READY || mode == FL_POINT
+		      || !cfip
+		      || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))
+		      || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1))))
+			goto sleep;
+
+		/* We could check to see if we're trying to access the sector
+		 * that is currently being erased. However, no user will try
+		 * anything like that so we just wait for the timeout. */
+
+		/* Erase suspend */
+		/* It's harmless to issue the Erase-Suspend and Erase-Resume
+		 * commands when the erase algorithm isn't in progress. */
+		map_write(map, CMD(0xB0), chip->in_progress_block_addr);
+		chip->oldstate = FL_ERASING;
+		chip->state = FL_ERASE_SUSPENDING;
+		chip->erase_suspended = 1;
+		for (;;) {
+			if (chip_ready(map, adr))
+				break;
+
+			if (time_after(jiffies, timeo)) {
+				/* Should have suspended the erase by now.
+				 * Send an Erase-Resume command as either
+				 * there was an error (so leave the erase
+				 * routine to recover from it) or we trying to
+				 * use the erase-in-progress sector. */
+				map_write(map, CMD(0x30), chip->in_progress_block_addr);
+				chip->state = FL_ERASING;
+				chip->oldstate = FL_READY;
+				printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__);
+				return -EIO;
+			}
+			
+			cfi_spin_unlock(chip->mutex);
+			cfi_udelay(1);
+			cfi_spin_lock(chip->mutex);
+			/* Nobody will touch it while it's in state FL_ERASE_SUSPENDING.
+			   So we can just loop here. */
+		}
+		chip->state = FL_READY;
+		return 0;
+
+	case FL_POINT:
+		/* Only if there's no operation suspended... */
+		if (mode == FL_READY && chip->oldstate == FL_READY)
+			return 0;
+
+	default:
+	sleep:
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		cfi_spin_unlock(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		cfi_spin_lock(chip->mutex);
+		goto resettime;
+	}
+}
+
+
+static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+
+	switch(chip->oldstate) {
+	case FL_ERASING:
+		chip->state = chip->oldstate;
+		map_write(map, CMD(0x30), chip->in_progress_block_addr);
+		chip->oldstate = FL_READY;
+		chip->state = FL_ERASING;
+		break;
+
+	case FL_READY:
+	case FL_STATUS:
+		/* We should really make set_vpp() count, rather than doing this */
+		DISABLE_VPP(map);
+		break;
+	default:
+		printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate);
+	}
+	wake_up(&chip->wq);
+}
+
+
+static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
+{
+	unsigned long cmd_addr;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret;
+
+	adr += chip->start;
+
+	/* Ensure cmd read/writes are aligned. */ 
+	cmd_addr = adr & ~(map_bankwidth(map)-1); 
+
+	cfi_spin_lock(chip->mutex);
+	ret = get_chip(map, chip, cmd_addr, FL_READY);
+	if (ret) {
+		cfi_spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	if (chip->state != FL_POINT && chip->state != FL_READY) {
+		map_write(map, CMD(0xf0), cmd_addr);
+		chip->state = FL_READY;
+	}
+
+	map_copy_from(map, buf, adr, len);
+
+	put_chip(map, chip, cmd_addr);
+
+	cfi_spin_unlock(chip->mutex);
+	return 0;
+}
+
+
+static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+	int ret = 0;
+
+	/* ofs: offset within the first chip that the first read should start */
+
+	chipnum = (from >> cfi->chipshift);
+	ofs = from - (chipnum <<  cfi->chipshift);
+
+
+	*retlen = 0;
+
+	while (len) {
+		unsigned long thislen;
+
+		if (chipnum >= cfi->numchips)
+			break;
+
+		if ((len + ofs -1) >> cfi->chipshift)
+			thislen = (1<<cfi->chipshift) - ofs;
+		else
+			thislen = len;
+
+		ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
+		if (ret)
+			break;
+
+		*retlen += thislen;
+		len -= thislen;
+		buf += thislen;
+
+		ofs = 0;
+		chipnum++;
+	}
+	return ret;
+}
+
+
+static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long timeo = jiffies + HZ;
+	struct cfi_private *cfi = map->fldrv_priv;
+
+ retry:
+	cfi_spin_lock(chip->mutex);
+
+	if (chip->state != FL_READY){
+#if 0
+		printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state);
+#endif
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		
+		cfi_spin_unlock(chip->mutex);
+
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+#if 0
+		if(signal_pending(current))
+			return -EINTR;
+#endif
+		timeo = jiffies + HZ;
+
+		goto retry;
+	}	
+
+	adr += chip->start;
+
+	chip->state = FL_READY;
+
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	
+	map_copy_from(map, buf, adr, len);
+
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	
+	wake_up(&chip->wq);
+	cfi_spin_unlock(chip->mutex);
+
+	return 0;
+}
+
+static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+	int ret = 0;
+
+
+	/* ofs: offset within the first chip that the first read should start */
+
+	/* 8 secsi bytes per chip */
+	chipnum=from>>3;
+	ofs=from & 7;
+
+
+	*retlen = 0;
+
+	while (len) {
+		unsigned long thislen;
+
+		if (chipnum >= cfi->numchips)
+			break;
+
+		if ((len + ofs -1) >> 3)
+			thislen = (1<<3) - ofs;
+		else
+			thislen = len;
+
+		ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
+		if (ret)
+			break;
+
+		*retlen += thislen;
+		len -= thislen;
+		buf += thislen;
+
+		ofs = 0;
+		chipnum++;
+	}
+	return ret;
+}
+
+
+static int do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long timeo = jiffies + HZ;
+	/*
+	 * We use a 1ms + 1 jiffies generic timeout for writes (most devices
+	 * have a max write time of a few hundreds usec). However, we should
+	 * use the maximum timeout value given by the chip at probe time
+	 * instead.  Unfortunately, struct flchip does have a field for
+	 * maximum timeout, only for typical which can be far too short
+	 * depending of the conditions.	 The ' + 1' is to avoid having a
+	 * timeout of 0 jiffies if HZ is smaller than 1000.
+	 */
+	unsigned long uWriteTimeout = ( HZ / 1000 ) + 1;
+	int ret = 0;
+	map_word oldd;
+	int retry_cnt = 0;
+
+	adr += chip->start;
+
+	cfi_spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_WRITING);
+	if (ret) {
+		cfi_spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
+	       __func__, adr, datum.x[0] );
+
+	/*
+	 * Check for a NOP for the case when the datum to write is already
+	 * present - it saves time and works around buggy chips that corrupt
+	 * data at other locations when 0xff is written to a location that
+	 * already contains 0xff.
+	 */
+	oldd = map_read(map, adr);
+	if (map_word_equal(map, oldd, datum)) {
+		DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n",
+		       __func__);
+		goto op_done;
+	}
+
+	ENABLE_VPP(map);
+ retry:
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	map_write(map, datum, adr);
+	chip->state = FL_WRITING;
+
+	cfi_spin_unlock(chip->mutex);
+	cfi_udelay(chip->word_write_time);
+	cfi_spin_lock(chip->mutex);
+
+	/* See comment above for timeout value. */
+	timeo = jiffies + uWriteTimeout; 
+	for (;;) {
+		if (chip->state != FL_WRITING) {
+			/* Someone's suspended the write. Sleep */
+			DECLARE_WAITQUEUE(wait, current);
+
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			cfi_spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			timeo = jiffies + (HZ / 2); /* FIXME */
+			cfi_spin_lock(chip->mutex);
+			continue;
+		}
+
+		if (chip_ready(map, adr))
+			goto op_done;
+
+		if (time_after(jiffies, timeo))
+                        break;
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		cfi_spin_unlock(chip->mutex);
+		cfi_udelay(1);
+		cfi_spin_lock(chip->mutex);
+	}
+
+	printk(KERN_WARNING "MTD %s(): software timeout\n", __func__);
+
+	/* reset on all failures. */
+	map_write( map, CMD(0xF0), chip->start );
+	/* FIXME - should have reset delay before continuing */
+	if (++retry_cnt <= MAX_WORD_RETRIES) 
+		goto retry;
+
+	ret = -EIO;
+ op_done:
+	chip->state = FL_READY;
+	put_chip(map, chip, adr);
+	cfi_spin_unlock(chip->mutex);
+
+	return ret;
+}
+
+
+static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len,
+				  size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret = 0;
+	int chipnum;
+	unsigned long ofs, chipstart;
+	DECLARE_WAITQUEUE(wait, current);
+
+	*retlen = 0;
+	if (!len)
+		return 0;
+
+	chipnum = to >> cfi->chipshift;
+	ofs = to  - (chipnum << cfi->chipshift);
+	chipstart = cfi->chips[chipnum].start;
+
+	/* If it's not bus-aligned, do the first byte write */
+	if (ofs & (map_bankwidth(map)-1)) {
+		unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1);
+		int i = ofs - bus_ofs;
+		int n = 0;
+		map_word tmp_buf;
+
+ retry:
+		cfi_spin_lock(cfi->chips[chipnum].mutex);
+
+		if (cfi->chips[chipnum].state != FL_READY) {
+#if 0
+			printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state);
+#endif
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&cfi->chips[chipnum].wq, &wait);
+
+			cfi_spin_unlock(cfi->chips[chipnum].mutex);
+
+			schedule();
+			remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
+#if 0
+			if(signal_pending(current))
+				return -EINTR;
+#endif
+			goto retry;
+		}
+
+		/* Load 'tmp_buf' with old contents of flash */
+		tmp_buf = map_read(map, bus_ofs+chipstart);
+
+		cfi_spin_unlock(cfi->chips[chipnum].mutex);
+
+		/* Number of bytes to copy from buffer */
+		n = min_t(int, len, map_bankwidth(map)-i);
+		
+		tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n);
+
+		ret = do_write_oneword(map, &cfi->chips[chipnum], 
+				       bus_ofs, tmp_buf);
+		if (ret) 
+			return ret;
+		
+		ofs += n;
+		buf += n;
+		(*retlen) += n;
+		len -= n;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+	
+	/* We are now aligned, write as much as possible */
+	while(len >= map_bankwidth(map)) {
+		map_word datum;
+
+		datum = map_word_load(map, buf);
+
+		ret = do_write_oneword(map, &cfi->chips[chipnum],
+				       ofs, datum);
+		if (ret)
+			return ret;
+
+		ofs += map_bankwidth(map);
+		buf += map_bankwidth(map);
+		(*retlen) += map_bankwidth(map);
+		len -= map_bankwidth(map);
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+			chipstart = cfi->chips[chipnum].start;
+		}
+	}
+
+	/* Write the trailing bytes if any */
+	if (len & (map_bankwidth(map)-1)) {
+		map_word tmp_buf;
+
+ retry1:
+		cfi_spin_lock(cfi->chips[chipnum].mutex);
+
+		if (cfi->chips[chipnum].state != FL_READY) {
+#if 0
+			printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state);
+#endif
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&cfi->chips[chipnum].wq, &wait);
+
+			cfi_spin_unlock(cfi->chips[chipnum].mutex);
+
+			schedule();
+			remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
+#if 0
+			if(signal_pending(current))
+				return -EINTR;
+#endif
+			goto retry1;
+		}
+
+		tmp_buf = map_read(map, ofs + chipstart);
+
+		cfi_spin_unlock(cfi->chips[chipnum].mutex);
+
+		tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len);
+	
+		ret = do_write_oneword(map, &cfi->chips[chipnum], 
+				ofs, tmp_buf);
+		if (ret) 
+			return ret;
+		
+		(*retlen) += len;
+	}
+
+	return 0;
+}
+
+
+/*
+ * FIXME: interleaved mode not tested, and probably not supported!
+ */
+static inline int do_write_buffer(struct map_info *map, struct flchip *chip, 
+				  unsigned long adr, const u_char *buf, int len)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long timeo = jiffies + HZ;
+	/* see comments in do_write_oneword() regarding uWriteTimeo. */
+	unsigned long uWriteTimeout = ( HZ / 1000 ) + 1;
+	int ret = -EIO;
+	unsigned long cmd_adr;
+	int z, words;
+	map_word datum;
+
+	adr += chip->start;
+	cmd_adr = adr;
+
+	cfi_spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_WRITING);
+	if (ret) {
+		cfi_spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	datum = map_word_load(map, buf);
+
+	DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
+	       __func__, adr, datum.x[0] );
+
+	ENABLE_VPP(map);
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	//cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+
+	/* Write Buffer Load */
+	map_write(map, CMD(0x25), cmd_adr);
+
+	chip->state = FL_WRITING_TO_BUFFER;
+
+	/* Write length of data to come */
+	words = len / map_bankwidth(map);
+	map_write(map, CMD(words - 1), cmd_adr);
+	/* Write data */
+	z = 0;
+	while(z < words * map_bankwidth(map)) {
+		datum = map_word_load(map, buf);
+		map_write(map, datum, adr + z);
+
+		z += map_bankwidth(map);
+		buf += map_bankwidth(map);
+	}
+	z -= map_bankwidth(map);
+
+	adr += z;
+
+	/* Write Buffer Program Confirm: GO GO GO */
+	map_write(map, CMD(0x29), cmd_adr);
+	chip->state = FL_WRITING;
+
+	cfi_spin_unlock(chip->mutex);
+	cfi_udelay(chip->buffer_write_time);
+	cfi_spin_lock(chip->mutex);
+
+	timeo = jiffies + uWriteTimeout; 
+		
+	for (;;) {
+		if (chip->state != FL_WRITING) {
+			/* Someone's suspended the write. Sleep */
+			DECLARE_WAITQUEUE(wait, current);
+
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			cfi_spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			timeo = jiffies + (HZ / 2); /* FIXME */
+			cfi_spin_lock(chip->mutex);
+			continue;
+		}
+
+		if (chip_ready(map, adr))
+			goto op_done;
+		    
+		if( time_after(jiffies, timeo))
+			break;
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		cfi_spin_unlock(chip->mutex);
+		cfi_udelay(1);
+		cfi_spin_lock(chip->mutex);
+	}
+
+	printk(KERN_WARNING "MTD %s(): software timeout\n",
+	       __func__ );
+
+	/* reset on all failures. */
+	map_write( map, CMD(0xF0), chip->start );
+	/* FIXME - should have reset delay before continuing */
+
+	ret = -EIO;
+ op_done:
+	chip->state = FL_READY;
+	put_chip(map, chip, adr);
+	cfi_spin_unlock(chip->mutex);
+
+	return ret;
+}
+
+
+static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
+				    size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
+	int ret = 0;
+	int chipnum;
+	unsigned long ofs;
+
+	*retlen = 0;
+	if (!len)
+		return 0;
+
+	chipnum = to >> cfi->chipshift;
+	ofs = to  - (chipnum << cfi->chipshift);
+
+	/* If it's not bus-aligned, do the first word write */
+	if (ofs & (map_bankwidth(map)-1)) {
+		size_t local_len = (-ofs)&(map_bankwidth(map)-1);
+		if (local_len > len)
+			local_len = len;
+		ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift),
+					     local_len, retlen, buf);
+		if (ret)
+			return ret;
+		ofs += local_len;
+		buf += local_len;
+		len -= local_len;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++;
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+
+	/* Write buffer is worth it only if more than one word to write... */
+	while (len >= map_bankwidth(map) * 2) {
+		/* We must not cross write block boundaries */
+		int size = wbufsize - (ofs & (wbufsize-1));
+
+		if (size > len)
+			size = len;
+		if (size % map_bankwidth(map))
+			size -= size % map_bankwidth(map);
+
+		ret = do_write_buffer(map, &cfi->chips[chipnum], 
+				      ofs, buf, size);
+		if (ret)
+			return ret;
+
+		ofs += size;
+		buf += size;
+		(*retlen) += size;
+		len -= size;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+
+	if (len) {
+		size_t retlen_dregs = 0;
+
+		ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift),
+					     len, &retlen_dregs, buf);
+
+		*retlen += retlen_dregs;
+		return ret;
+	}
+
+	return 0;
+}
+
+
+/*
+ * Handle devices with one erase region, that only implement
+ * the chip erase command.
+ */
+static inline int do_erase_chip(struct map_info *map, struct flchip *chip)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long timeo = jiffies + HZ;
+	unsigned long int adr;
+	DECLARE_WAITQUEUE(wait, current);
+	int ret = 0;
+
+	adr = cfi->addr_unlock1;
+
+	cfi_spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_WRITING);
+	if (ret) {
+		cfi_spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
+	       __func__, chip->start );
+
+	ENABLE_VPP(map);
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+
+	chip->state = FL_ERASING;
+	chip->erase_suspended = 0;
+	chip->in_progress_block_addr = adr;
+
+	cfi_spin_unlock(chip->mutex);
+	msleep(chip->erase_time/2);
+	cfi_spin_lock(chip->mutex);
+
+	timeo = jiffies + (HZ*20);
+
+	for (;;) {
+		if (chip->state != FL_ERASING) {
+			/* Someone's suspended the erase. Sleep */
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			cfi_spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			cfi_spin_lock(chip->mutex);
+			continue;
+		}
+		if (chip->erase_suspended) {
+			/* This erase was suspended and resumed.
+			   Adjust the timeout */
+			timeo = jiffies + (HZ*20); /* FIXME */
+			chip->erase_suspended = 0;
+		}
+
+		if (chip_ready(map, adr))
+			goto op_done;
+
+		if (time_after(jiffies, timeo))
+			break;
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		cfi_spin_unlock(chip->mutex);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+		cfi_spin_lock(chip->mutex);
+	}
+
+	printk(KERN_WARNING "MTD %s(): software timeout\n",
+	       __func__ );
+
+	/* reset on all failures. */
+	map_write( map, CMD(0xF0), chip->start );
+	/* FIXME - should have reset delay before continuing */
+
+	ret = -EIO;
+ op_done:
+	chip->state = FL_READY;
+	put_chip(map, chip, adr);
+	cfi_spin_unlock(chip->mutex);
+
+	return ret;
+}
+
+
+static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long timeo = jiffies + HZ;
+	DECLARE_WAITQUEUE(wait, current);
+	int ret = 0;
+
+	adr += chip->start;
+
+	cfi_spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_ERASING);
+	if (ret) {
+		cfi_spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
+	       __func__, adr );
+
+	ENABLE_VPP(map);
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
+	map_write(map, CMD(0x30), adr);
+
+	chip->state = FL_ERASING;
+	chip->erase_suspended = 0;
+	chip->in_progress_block_addr = adr;
+	
+	cfi_spin_unlock(chip->mutex);
+	msleep(chip->erase_time/2);
+	cfi_spin_lock(chip->mutex);
+
+	timeo = jiffies + (HZ*20);
+
+	for (;;) {
+		if (chip->state != FL_ERASING) {
+			/* Someone's suspended the erase. Sleep */
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			cfi_spin_unlock(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			cfi_spin_lock(chip->mutex);
+			continue;
+		}
+		if (chip->erase_suspended) {
+			/* This erase was suspended and resumed.
+			   Adjust the timeout */
+			timeo = jiffies + (HZ*20); /* FIXME */
+			chip->erase_suspended = 0;
+		}
+
+		if (chip_ready(map, adr))
+			goto op_done;
+
+		if (time_after(jiffies, timeo))
+			break;
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		cfi_spin_unlock(chip->mutex);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(1);
+		cfi_spin_lock(chip->mutex);
+	}
+	
+	printk(KERN_WARNING "MTD %s(): software timeout\n",
+	       __func__ );
+	
+	/* reset on all failures. */
+	map_write( map, CMD(0xF0), chip->start );
+	/* FIXME - should have reset delay before continuing */
+
+	ret = -EIO;
+ op_done:
+	chip->state = FL_READY;
+	put_chip(map, chip, adr);
+	cfi_spin_unlock(chip->mutex);
+	return ret;
+}
+
+
+int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
+{
+	unsigned long ofs, len;
+	int ret;
+
+	ofs = instr->addr;
+	len = instr->len;
+
+	ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL);
+	if (ret)
+		return ret;
+
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+	
+	return 0;
+}
+
+
+static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int ret = 0;
+
+	if (instr->addr != 0)
+		return -EINVAL;
+
+	if (instr->len != mtd->size)
+		return -EINVAL;
+
+	ret = do_erase_chip(map, &cfi->chips[0]);
+	if (ret)
+		return ret;
+
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+	
+	return 0;
+}
+
+
+static void cfi_amdstd_sync (struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+	DECLARE_WAITQUEUE(wait, current);
+
+	for (i=0; !ret && i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+
+	retry:
+		cfi_spin_lock(chip->mutex);
+
+		switch(chip->state) {
+		case FL_READY:
+		case FL_STATUS:
+		case FL_CFI_QUERY:
+		case FL_JEDEC_QUERY:
+			chip->oldstate = chip->state;
+			chip->state = FL_SYNCING;
+			/* No need to wake_up() on this state change - 
+			 * as the whole point is that nobody can do anything
+			 * with the chip now anyway.
+			 */
+		case FL_SYNCING:
+			cfi_spin_unlock(chip->mutex);
+			break;
+
+		default:
+			/* Not an idle state */
+			add_wait_queue(&chip->wq, &wait);
+			
+			cfi_spin_unlock(chip->mutex);
+
+			schedule();
+
+			remove_wait_queue(&chip->wq, &wait);
+			
+			goto retry;
+		}
+	}
+
+	/* Unlock the chips again */
+
+	for (i--; i >=0; i--) {
+		chip = &cfi->chips[i];
+
+		cfi_spin_lock(chip->mutex);
+		
+		if (chip->state == FL_SYNCING) {
+			chip->state = chip->oldstate;
+			wake_up(&chip->wq);
+		}
+		cfi_spin_unlock(chip->mutex);
+	}
+}
+
+
+static int cfi_amdstd_suspend(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+
+	for (i=0; !ret && i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+
+		cfi_spin_lock(chip->mutex);
+
+		switch(chip->state) {
+		case FL_READY:
+		case FL_STATUS:
+		case FL_CFI_QUERY:
+		case FL_JEDEC_QUERY:
+			chip->oldstate = chip->state;
+			chip->state = FL_PM_SUSPENDED;
+			/* No need to wake_up() on this state change - 
+			 * as the whole point is that nobody can do anything
+			 * with the chip now anyway.
+			 */
+		case FL_PM_SUSPENDED:
+			break;
+
+		default:
+			ret = -EAGAIN;
+			break;
+		}
+		cfi_spin_unlock(chip->mutex);
+	}
+
+	/* Unlock the chips again */
+
+	if (ret) {
+		for (i--; i >=0; i--) {
+			chip = &cfi->chips[i];
+
+			cfi_spin_lock(chip->mutex);
+		
+			if (chip->state == FL_PM_SUSPENDED) {
+				chip->state = chip->oldstate;
+				wake_up(&chip->wq);
+			}
+			cfi_spin_unlock(chip->mutex);
+		}
+	}
+	
+	return ret;
+}
+
+
+static void cfi_amdstd_resume(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+
+	for (i=0; i<cfi->numchips; i++) {
+	
+		chip = &cfi->chips[i];
+
+		cfi_spin_lock(chip->mutex);
+		
+		if (chip->state == FL_PM_SUSPENDED) {
+			chip->state = FL_READY;
+			map_write(map, CMD(0xF0), chip->start);
+			wake_up(&chip->wq);
+		}
+		else
+			printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n");
+
+		cfi_spin_unlock(chip->mutex);
+	}
+}
+
+static void cfi_amdstd_destroy(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	kfree(cfi->cmdset_priv);
+	kfree(cfi->cfiq);
+	kfree(cfi);
+	kfree(mtd->eraseregions);
+}
+
+static char im_name[]="cfi_cmdset_0002";
+
+
+static int __init cfi_amdstd_init(void)
+{
+	inter_module_register(im_name, THIS_MODULE, &cfi_cmdset_0002);
+	return 0;
+}
+
+
+static void __exit cfi_amdstd_exit(void)
+{
+	inter_module_unregister(im_name);
+}
+
+
+module_init(cfi_amdstd_init);
+module_exit(cfi_amdstd_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al.");
+MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips");
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
new file mode 100644
index 000000000000..8c24e18db3b4
--- /dev/null
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -0,0 +1,1418 @@
+/*
+ * Common Flash Interface support:
+ *   ST Advanced Architecture Command Set (ID 0x0020)
+ *
+ * (C) 2000 Red Hat. GPL'd
+ *
+ * $Id: cfi_cmdset_0020.c,v 1.17 2004/11/20 12:49:04 dwmw2 Exp $
+ * 
+ * 10/10/2000	Nicolas Pitre <nico@cam.org>
+ * 	- completely revamped method functions so they are aware and
+ * 	  independent of the flash geometry (buswidth, interleave, etc.)
+ * 	- scalability vs code size is completely set at compile-time
+ * 	  (see include/linux/mtd/cfi.h for selection)
+ *	- optimized write buffer method
+ * 06/21/2002	Joern Engel <joern@wh.fh-wedel.de> and others
+ *	- modified Intel Command Set 0x0001 to support ST Advanced Architecture
+ *	  (command set 0x0020)
+ *	- added a writev function
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/cfi.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/compatmac.h>
+
+
+static int cfi_staa_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+static int cfi_staa_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs,
+		unsigned long count, loff_t to, size_t *retlen);
+static int cfi_staa_erase_varsize(struct mtd_info *, struct erase_info *);
+static void cfi_staa_sync (struct mtd_info *);
+static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, size_t len);
+static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, size_t len);
+static int cfi_staa_suspend (struct mtd_info *);
+static void cfi_staa_resume (struct mtd_info *);
+
+static void cfi_staa_destroy(struct mtd_info *);
+
+struct mtd_info *cfi_cmdset_0020(struct map_info *, int);
+
+static struct mtd_info *cfi_staa_setup (struct map_info *);
+
+static struct mtd_chip_driver cfi_staa_chipdrv = {
+	.probe		= NULL, /* Not usable directly */
+	.destroy	= cfi_staa_destroy,
+	.name		= "cfi_cmdset_0020",
+	.module		= THIS_MODULE
+};
+
+/* #define DEBUG_LOCK_BITS */
+//#define DEBUG_CFI_FEATURES
+
+#ifdef DEBUG_CFI_FEATURES
+static void cfi_tell_features(struct cfi_pri_intelext *extp)
+{
+        int i;
+        printk("  Feature/Command Support: %4.4X\n", extp->FeatureSupport);
+	printk("     - Chip Erase:         %s\n", extp->FeatureSupport&1?"supported":"unsupported");
+	printk("     - Suspend Erase:      %s\n", extp->FeatureSupport&2?"supported":"unsupported");
+	printk("     - Suspend Program:    %s\n", extp->FeatureSupport&4?"supported":"unsupported");
+	printk("     - Legacy Lock/Unlock: %s\n", extp->FeatureSupport&8?"supported":"unsupported");
+	printk("     - Queued Erase:       %s\n", extp->FeatureSupport&16?"supported":"unsupported");
+	printk("     - Instant block lock: %s\n", extp->FeatureSupport&32?"supported":"unsupported");
+	printk("     - Protection Bits:    %s\n", extp->FeatureSupport&64?"supported":"unsupported");
+	printk("     - Page-mode read:     %s\n", extp->FeatureSupport&128?"supported":"unsupported");
+	printk("     - Synchronous read:   %s\n", extp->FeatureSupport&256?"supported":"unsupported");
+	for (i=9; i<32; i++) {
+		if (extp->FeatureSupport & (1<<i)) 
+			printk("     - Unknown Bit %X:      supported\n", i);
+	}
+	
+	printk("  Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport);
+	printk("     - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported");
+	for (i=1; i<8; i++) {
+		if (extp->SuspendCmdSupport & (1<<i))
+			printk("     - Unknown Bit %X:               supported\n", i);
+	}
+	
+	printk("  Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask);
+	printk("     - Lock Bit Active:      %s\n", extp->BlkStatusRegMask&1?"yes":"no");
+	printk("     - Valid Bit Active:     %s\n", extp->BlkStatusRegMask&2?"yes":"no");
+	for (i=2; i<16; i++) {
+		if (extp->BlkStatusRegMask & (1<<i))
+			printk("     - Unknown Bit %X Active: yes\n",i);
+	}
+	
+	printk("  Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", 
+	       extp->VccOptimal >> 8, extp->VccOptimal & 0xf);
+	if (extp->VppOptimal)
+		printk("  Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", 
+		       extp->VppOptimal >> 8, extp->VppOptimal & 0xf);
+}
+#endif
+
+/* This routine is made available to other mtd code via
+ * inter_module_register.  It must only be accessed through
+ * inter_module_get which will bump the use count of this module.  The
+ * addresses passed back in cfi are valid as long as the use count of
+ * this module is non-zero, i.e. between inter_module_get and
+ * inter_module_put.  Keith Owens <kaos@ocs.com.au> 29 Oct 2000.
+ */
+struct mtd_info *cfi_cmdset_0020(struct map_info *map, int primary)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+
+	if (cfi->cfi_mode) {
+		/* 
+		 * It's a real CFI chip, not one for which the probe
+		 * routine faked a CFI structure. So we read the feature
+		 * table from it.
+		 */
+		__u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
+		struct cfi_pri_intelext *extp;
+
+		extp = (struct cfi_pri_intelext*)cfi_read_pri(map, adr, sizeof(*extp), "ST Microelectronics");
+		if (!extp)
+			return NULL;
+
+		/* Do some byteswapping if necessary */
+		extp->FeatureSupport = cfi32_to_cpu(extp->FeatureSupport);
+		extp->BlkStatusRegMask = cfi32_to_cpu(extp->BlkStatusRegMask);
+		
+#ifdef DEBUG_CFI_FEATURES
+		/* Tell the user about it in lots of lovely detail */
+		cfi_tell_features(extp);
+#endif	
+
+		/* Install our own private info structure */
+		cfi->cmdset_priv = extp;
+	}	
+
+	for (i=0; i< cfi->numchips; i++) {
+		cfi->chips[i].word_write_time = 128;
+		cfi->chips[i].buffer_write_time = 128;
+		cfi->chips[i].erase_time = 1024;
+	}		
+
+	return cfi_staa_setup(map);
+}
+
+static struct mtd_info *cfi_staa_setup(struct map_info *map)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct mtd_info *mtd;
+	unsigned long offset = 0;
+	int i,j;
+	unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	//printk(KERN_DEBUG "number of CFI chips: %d\n", cfi->numchips);
+
+	if (!mtd) {
+		printk(KERN_ERR "Failed to allocate memory for MTD device\n");
+		kfree(cfi->cmdset_priv);
+		return NULL;
+	}
+
+	memset(mtd, 0, sizeof(*mtd));
+	mtd->priv = map;
+	mtd->type = MTD_NORFLASH;
+	mtd->size = devsize * cfi->numchips;
+
+	mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
+	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 
+			* mtd->numeraseregions, GFP_KERNEL);
+	if (!mtd->eraseregions) { 
+		printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n");
+		kfree(cfi->cmdset_priv);
+		kfree(mtd);
+		return NULL;
+	}
+	
+	for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
+		unsigned long ernum, ersize;
+		ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
+		ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1;
+
+		if (mtd->erasesize < ersize) {
+			mtd->erasesize = ersize;
+		}
+		for (j=0; j<cfi->numchips; j++) {
+			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;
+		}
+		offset += (ersize * ernum);
+		}
+
+		if (offset != devsize) {
+			/* Argh */
+			printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize);
+			kfree(mtd->eraseregions);
+			kfree(cfi->cmdset_priv);
+			kfree(mtd);
+			return NULL;
+		}
+
+		for (i=0; i<mtd->numeraseregions;i++){
+			printk(KERN_DEBUG "%d: offset=0x%x,size=0x%x,blocks=%d\n",
+			       i,mtd->eraseregions[i].offset,
+			       mtd->eraseregions[i].erasesize,
+			       mtd->eraseregions[i].numblocks);
+		}
+
+	/* Also select the correct geometry setup too */ 
+	mtd->erase = cfi_staa_erase_varsize;
+	mtd->read = cfi_staa_read;
+        mtd->write = cfi_staa_write_buffers;
+	mtd->writev = cfi_staa_writev;
+	mtd->sync = cfi_staa_sync;
+	mtd->lock = cfi_staa_lock;
+	mtd->unlock = cfi_staa_unlock;
+	mtd->suspend = cfi_staa_suspend;
+	mtd->resume = cfi_staa_resume;
+	mtd->flags = MTD_CAP_NORFLASH;
+	mtd->flags |= MTD_ECC; /* FIXME: Not all STMicro flashes have this */
+	mtd->eccsize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */
+	map->fldrv = &cfi_staa_chipdrv;
+	__module_get(THIS_MODULE);
+	mtd->name = map->name;
+	return mtd;
+}
+
+
+static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
+{
+	map_word status, status_OK;
+	unsigned long timeo;
+	DECLARE_WAITQUEUE(wait, current);
+	int suspended = 0;
+	unsigned long cmd_addr;
+	struct cfi_private *cfi = map->fldrv_priv;
+
+	adr += chip->start;
+
+	/* Ensure cmd read/writes are aligned. */ 
+	cmd_addr = adr & ~(map_bankwidth(map)-1); 
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	timeo = jiffies + HZ;
+ retry:
+	spin_lock_bh(chip->mutex);
+
+	/* Check that the chip's ready to talk to us.
+	 * If it's in FL_ERASING state, suspend it and make it talk now.
+	 */
+	switch (chip->state) {
+	case FL_ERASING:
+		if (!(((struct cfi_pri_intelext *)cfi->cmdset_priv)->FeatureSupport & 2))
+			goto sleep; /* We don't support erase suspend */
+		
+		map_write (map, CMD(0xb0), cmd_addr);
+		/* If the flash has finished erasing, then 'erase suspend'
+		 * appears to make some (28F320) flash devices switch to
+		 * 'read' mode.  Make sure that we switch to 'read status'
+		 * mode so we get the right data. --rmk
+		 */
+		map_write(map, CMD(0x70), cmd_addr);
+		chip->oldstate = FL_ERASING;
+		chip->state = FL_ERASE_SUSPENDING;
+		//		printk("Erase suspending at 0x%lx\n", cmd_addr);
+		for (;;) {
+			status = map_read(map, cmd_addr);
+			if (map_word_andequal(map, status, status_OK, status_OK))
+				break;
+			
+			if (time_after(jiffies, timeo)) {
+				/* Urgh */
+				map_write(map, CMD(0xd0), cmd_addr);
+				/* make sure we're in 'read status' mode */
+				map_write(map, CMD(0x70), cmd_addr);
+				chip->state = FL_ERASING;
+				spin_unlock_bh(chip->mutex);
+				printk(KERN_ERR "Chip not ready after erase "
+				       "suspended: status = 0x%lx\n", status.x[0]);
+				return -EIO;
+			}
+			
+			spin_unlock_bh(chip->mutex);
+			cfi_udelay(1);
+			spin_lock_bh(chip->mutex);
+		}
+		
+		suspended = 1;
+		map_write(map, CMD(0xff), cmd_addr);
+		chip->state = FL_READY;
+		break;
+	
+#if 0
+	case FL_WRITING:
+		/* Not quite yet */
+#endif
+
+	case FL_READY:
+		break;
+
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+		map_write(map, CMD(0x70), cmd_addr);
+		chip->state = FL_STATUS;
+
+	case FL_STATUS:
+		status = map_read(map, cmd_addr);
+		if (map_word_andequal(map, status, status_OK, status_OK)) {
+			map_write(map, CMD(0xff), cmd_addr);
+			chip->state = FL_READY;
+			break;
+		}
+		
+		/* Urgh. Chip not yet ready to talk to us. */
+		if (time_after(jiffies, timeo)) {
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_ERR "waiting for chip to be ready timed out in read. WSM status = %lx\n", status.x[0]);
+			return -EIO;
+		}
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		goto retry;
+
+	default:
+	sleep:
+		/* Stick ourselves on a wait queue to be woken when
+		   someone changes the status */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		spin_unlock_bh(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		timeo = jiffies + HZ;
+		goto retry;
+	}
+
+	map_copy_from(map, buf, adr, len);
+
+	if (suspended) {
+		chip->state = chip->oldstate;
+		/* What if one interleaved chip has finished and the 
+		   other hasn't? The old code would leave the finished
+		   one in READY mode. That's bad, and caused -EROFS 
+		   errors to be returned from do_erase_oneblock because
+		   that's the only bit it checked for at the time.
+		   As the state machine appears to explicitly allow 
+		   sending the 0x70 (Read Status) command to an erasing
+		   chip and expecting it to be ignored, that's what we 
+		   do. */
+		map_write(map, CMD(0xd0), cmd_addr);
+		map_write(map, CMD(0x70), cmd_addr);		
+	}
+
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+	return 0;
+}
+
+static int cfi_staa_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long ofs;
+	int chipnum;
+	int ret = 0;
+
+	/* ofs: offset within the first chip that the first read should start */
+	chipnum = (from >> cfi->chipshift);
+	ofs = from - (chipnum <<  cfi->chipshift);
+
+	*retlen = 0;
+
+	while (len) {
+		unsigned long thislen;
+
+		if (chipnum >= cfi->numchips)
+			break;
+
+		if ((len + ofs -1) >> cfi->chipshift)
+			thislen = (1<<cfi->chipshift) - ofs;
+		else
+			thislen = len;
+
+		ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
+		if (ret)
+			break;
+
+		*retlen += thislen;
+		len -= thislen;
+		buf += thislen;
+		
+		ofs = 0;
+		chipnum++;
+	}
+	return ret;
+}
+
+static inline int do_write_buffer(struct map_info *map, struct flchip *chip, 
+				  unsigned long adr, const u_char *buf, int len)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long cmd_adr, timeo;
+	DECLARE_WAITQUEUE(wait, current);
+	int wbufsize, z;
+        
+        /* M58LW064A requires bus alignment for buffer wriets -- saw */
+        if (adr & (map_bankwidth(map)-1))
+            return -EINVAL;
+
+        wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
+        adr += chip->start;
+	cmd_adr = adr & ~(wbufsize-1);
+	
+	/* Let's determine this according to the interleave only once */
+        status_OK = CMD(0x80);
+        
+	timeo = jiffies + HZ;
+ retry:
+
+#ifdef DEBUG_CFI_FEATURES
+       printk("%s: chip->state[%d]\n", __FUNCTION__, chip->state);
+#endif
+	spin_lock_bh(chip->mutex);
+ 
+	/* Check that the chip's ready to talk to us.
+	 * Later, we can actually think about interrupting it
+	 * if it's in FL_ERASING state.
+	 * Not just yet, though.
+	 */
+	switch (chip->state) {
+	case FL_READY:
+		break;
+		
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+		map_write(map, CMD(0x70), cmd_adr);
+                chip->state = FL_STATUS;
+#ifdef DEBUG_CFI_FEATURES
+        printk("%s: 1 status[%x]\n", __FUNCTION__, map_read(map, cmd_adr));
+#endif
+
+	case FL_STATUS:
+		status = map_read(map, cmd_adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		/* Urgh. Chip not yet ready to talk to us. */
+		if (time_after(jiffies, timeo)) {
+			spin_unlock_bh(chip->mutex);
+                        printk(KERN_ERR "waiting for chip to be ready timed out in buffer write Xstatus = %lx, status = %lx\n",
+                               status.x[0], map_read(map, cmd_adr).x[0]);
+			return -EIO;
+		}
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		goto retry;
+
+	default:
+		/* Stick ourselves on a wait queue to be woken when
+		   someone changes the status */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		spin_unlock_bh(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		timeo = jiffies + HZ;
+		goto retry;
+	}
+
+	ENABLE_VPP(map);
+	map_write(map, CMD(0xe8), cmd_adr);
+	chip->state = FL_WRITING_TO_BUFFER;
+
+	z = 0;
+	for (;;) {
+		status = map_read(map, cmd_adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		spin_lock_bh(chip->mutex);
+
+		if (++z > 100) {
+			/* Argh. Not ready for write to buffer */
+			DISABLE_VPP(map);
+                        map_write(map, CMD(0x70), cmd_adr);
+			chip->state = FL_STATUS;
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_ERR "Chip not ready for buffer write. Xstatus = %lx\n", status.x[0]);
+			return -EIO;
+		}
+	}
+
+	/* Write length of data to come */
+	map_write(map, CMD(len/map_bankwidth(map)-1), cmd_adr );
+        
+	/* Write data */
+	for (z = 0; z < len;
+	     z += map_bankwidth(map), buf += map_bankwidth(map)) {
+		map_word d;
+		d = map_word_load(map, buf);
+		map_write(map, d, adr+z);
+	}
+	/* GO GO GO */
+	map_write(map, CMD(0xd0), cmd_adr);
+	chip->state = FL_WRITING;
+
+	spin_unlock_bh(chip->mutex);
+	cfi_udelay(chip->buffer_write_time);
+	spin_lock_bh(chip->mutex);
+
+	timeo = jiffies + (HZ/2);
+	z = 0;
+	for (;;) {
+		if (chip->state != FL_WRITING) {
+			/* Someone's suspended the write. Sleep */
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock_bh(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			timeo = jiffies + (HZ / 2); /* FIXME */
+			spin_lock_bh(chip->mutex);
+			continue;
+		}
+
+		status = map_read(map, cmd_adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+                        /* clear status */
+                        map_write(map, CMD(0x50), cmd_adr);
+                        /* put back into read status register mode */
+                        map_write(map, CMD(0x70), adr);
+			chip->state = FL_STATUS;
+			DISABLE_VPP(map);
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n");
+			return -EIO;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		z++;
+		spin_lock_bh(chip->mutex);
+	}
+	if (!z) {
+		chip->buffer_write_time--;
+		if (!chip->buffer_write_time)
+			chip->buffer_write_time++;
+	}
+	if (z > 1) 
+		chip->buffer_write_time++;
+        
+	/* Done and happy. */
+	DISABLE_VPP(map);
+	chip->state = FL_STATUS;
+
+        /* check for errors: 'lock bit', 'VPP', 'dead cell'/'unerased cell' or 'incorrect cmd' -- saw */
+        if (map_word_bitsset(map, status, CMD(0x3a))) {
+#ifdef DEBUG_CFI_FEATURES
+		printk("%s: 2 status[%lx]\n", __FUNCTION__, status.x[0]);
+#endif
+		/* clear status */
+		map_write(map, CMD(0x50), cmd_adr);
+		/* put back into read status register mode */
+		map_write(map, CMD(0x70), adr);
+		wake_up(&chip->wq);
+		spin_unlock_bh(chip->mutex);
+		return map_word_bitsset(map, status, CMD(0x02)) ? -EROFS : -EIO;
+	}
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+
+        return 0;
+}
+
+static int cfi_staa_write_buffers (struct mtd_info *mtd, loff_t to, 
+				       size_t len, size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
+	int ret = 0;
+	int chipnum;
+	unsigned long ofs;
+
+	*retlen = 0;
+	if (!len)
+		return 0;
+
+	chipnum = to >> cfi->chipshift;
+	ofs = to  - (chipnum << cfi->chipshift);
+
+#ifdef DEBUG_CFI_FEATURES
+        printk("%s: map_bankwidth(map)[%x]\n", __FUNCTION__, map_bankwidth(map));
+        printk("%s: chipnum[%x] wbufsize[%x]\n", __FUNCTION__, chipnum, wbufsize);
+        printk("%s: ofs[%x] len[%x]\n", __FUNCTION__, ofs, len);
+#endif
+        
+        /* Write buffer is worth it only if more than one word to write... */
+        while (len > 0) {
+		/* We must not cross write block boundaries */
+		int size = wbufsize - (ofs & (wbufsize-1));
+
+                if (size > len)
+                    size = len;
+
+                ret = do_write_buffer(map, &cfi->chips[chipnum], 
+				      ofs, buf, size);
+		if (ret)
+			return ret;
+
+		ofs += size;
+		buf += size;
+		(*retlen) += size;
+		len -= size;
+
+		if (ofs >> cfi->chipshift) {
+			chipnum ++; 
+			ofs = 0;
+			if (chipnum == cfi->numchips)
+				return 0;
+		}
+	}
+        
+	return 0;
+}
+
+/*
+ * Writev for ECC-Flashes is a little more complicated. We need to maintain
+ * a small buffer for this.
+ * XXX: If the buffer size is not a multiple of 2, this will break
+ */
+#define ECCBUF_SIZE (mtd->eccsize)
+#define ECCBUF_DIV(x) ((x) & ~(ECCBUF_SIZE - 1))
+#define ECCBUF_MOD(x) ((x) &  (ECCBUF_SIZE - 1))
+static int
+cfi_staa_writev(struct mtd_info *mtd, const struct kvec *vecs,
+		unsigned long count, loff_t to, size_t *retlen)
+{
+	unsigned long i;
+	size_t	 totlen = 0, thislen;
+	int	 ret = 0;
+	size_t	 buflen = 0;
+	static char *buffer;
+
+	if (!ECCBUF_SIZE) {
+		/* We should fall back to a general writev implementation.
+		 * Until that is written, just break.
+		 */
+		return -EIO;
+	}
+	buffer = kmalloc(ECCBUF_SIZE, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	for (i=0; i<count; i++) {
+		size_t elem_len = vecs[i].iov_len;
+		void *elem_base = vecs[i].iov_base;
+		if (!elem_len) /* FIXME: Might be unnecessary. Check that */
+			continue;
+		if (buflen) { /* cut off head */
+			if (buflen + elem_len < ECCBUF_SIZE) { /* just accumulate */
+				memcpy(buffer+buflen, elem_base, elem_len);
+				buflen += elem_len;
+				continue;
+			}
+			memcpy(buffer+buflen, elem_base, ECCBUF_SIZE-buflen);
+			ret = mtd->write(mtd, to, ECCBUF_SIZE, &thislen, buffer);
+			totlen += thislen;
+			if (ret || thislen != ECCBUF_SIZE)
+				goto write_error;
+			elem_len -= thislen-buflen;
+			elem_base += thislen-buflen;
+			to += ECCBUF_SIZE;
+		}
+		if (ECCBUF_DIV(elem_len)) { /* write clean aligned data */
+			ret = mtd->write(mtd, to, ECCBUF_DIV(elem_len), &thislen, elem_base);
+			totlen += thislen;
+			if (ret || thislen != ECCBUF_DIV(elem_len))
+				goto write_error;
+			to += thislen;
+		}
+		buflen = ECCBUF_MOD(elem_len); /* cut off tail */
+		if (buflen) {
+			memset(buffer, 0xff, ECCBUF_SIZE);
+			memcpy(buffer, elem_base + thislen, buflen);
+		}
+	}
+	if (buflen) { /* flush last page, even if not full */
+		/* This is sometimes intended behaviour, really */
+		ret = mtd->write(mtd, to, buflen, &thislen, buffer);
+		totlen += thislen;
+		if (ret || thislen != ECCBUF_SIZE)
+			goto write_error;
+	}
+write_error:
+	if (retlen)
+		*retlen = totlen;
+	return ret;
+}
+
+
+static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long timeo;
+	int retries = 3;
+	DECLARE_WAITQUEUE(wait, current);
+	int ret = 0;
+
+	adr += chip->start;
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	timeo = jiffies + HZ;
+retry:
+	spin_lock_bh(chip->mutex);
+
+	/* Check that the chip's ready to talk to us. */
+	switch (chip->state) {
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+	case FL_READY:
+		map_write(map, CMD(0x70), adr);
+		chip->state = FL_STATUS;
+
+	case FL_STATUS:
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* Urgh. Chip not yet ready to talk to us. */
+		if (time_after(jiffies, timeo)) {
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_ERR "waiting for chip to be ready timed out in erase\n");
+			return -EIO;
+		}
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		goto retry;
+
+	default:
+		/* Stick ourselves on a wait queue to be woken when
+		   someone changes the status */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		spin_unlock_bh(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		timeo = jiffies + HZ;
+		goto retry;
+	}
+
+	ENABLE_VPP(map);
+	/* Clear the status register first */
+	map_write(map, CMD(0x50), adr);
+
+	/* Now erase */
+	map_write(map, CMD(0x20), adr);
+	map_write(map, CMD(0xD0), adr);
+	chip->state = FL_ERASING;
+	
+	spin_unlock_bh(chip->mutex);
+	msleep(1000);
+	spin_lock_bh(chip->mutex);
+
+	/* FIXME. Use a timer to check this, and return immediately. */
+	/* Once the state machine's known to be working I'll do that */
+
+	timeo = jiffies + (HZ*20);
+	for (;;) {
+		if (chip->state != FL_ERASING) {
+			/* Someone's suspended the erase. Sleep */
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			add_wait_queue(&chip->wq, &wait);
+			spin_unlock_bh(chip->mutex);
+			schedule();
+			remove_wait_queue(&chip->wq, &wait);
+			timeo = jiffies + (HZ*20); /* FIXME */
+			spin_lock_bh(chip->mutex);
+			continue;
+		}
+
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			map_write(map, CMD(0x70), adr);
+			chip->state = FL_STATUS;
+			printk(KERN_ERR "waiting for erase to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]);
+			DISABLE_VPP(map);
+			spin_unlock_bh(chip->mutex);
+			return -EIO;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		spin_lock_bh(chip->mutex);
+	}
+	
+	DISABLE_VPP(map);
+	ret = 0;
+
+	/* We've broken this before. It doesn't hurt to be safe */
+	map_write(map, CMD(0x70), adr);
+	chip->state = FL_STATUS;
+	status = map_read(map, adr);
+
+	/* check for lock bit */
+	if (map_word_bitsset(map, status, CMD(0x3a))) {
+		unsigned char chipstatus = status.x[0];
+		if (!map_word_equal(map, status, CMD(chipstatus))) {
+			int i, w;
+			for (w=0; w<map_words(map); w++) {
+				for (i = 0; i<cfi_interleave(cfi); i++) {
+					chipstatus |= status.x[w] >> (cfi->device_type * 8);
+				}
+			}
+			printk(KERN_WARNING "Status is not identical for all chips: 0x%lx. Merging to give 0x%02x\n",
+			       status.x[0], chipstatus);
+		}
+		/* Reset the error bits */
+		map_write(map, CMD(0x50), adr);
+		map_write(map, CMD(0x70), adr);
+		
+		if ((chipstatus & 0x30) == 0x30) {
+			printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%x\n", chipstatus);
+			ret = -EIO;
+		} else if (chipstatus & 0x02) {
+			/* Protection bit set */
+			ret = -EROFS;
+		} else if (chipstatus & 0x8) {
+			/* Voltage */
+			printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%x\n", chipstatus);
+			ret = -EIO;
+		} else if (chipstatus & 0x20) {
+			if (retries--) {
+				printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x. Retrying...\n", adr, chipstatus);
+				timeo = jiffies + HZ;
+				chip->state = FL_STATUS;
+				spin_unlock_bh(chip->mutex);
+				goto retry;
+			}
+			printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%x\n", adr, chipstatus);
+			ret = -EIO;
+		}
+	}
+
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+	return ret;
+}
+
+int cfi_staa_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
+{	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long adr, len;
+	int chipnum, ret = 0;
+	int i, first;
+	struct mtd_erase_region_info *regions = mtd->eraseregions;
+
+	if (instr->addr > mtd->size)
+		return -EINVAL;
+
+	if ((instr->len + instr->addr) > mtd->size)
+		return -EINVAL;
+
+	/* Check that both start and end of the requested erase are
+	 * aligned with the erasesize at the appropriate addresses.
+	 */
+
+	i = 0;
+
+	/* Skip all erase regions which are ended before the start of 
+	   the requested erase. Actually, to save on the calculations,
+	   we skip to the first erase region which starts after the
+	   start of the requested erase, and then go back one.
+	*/
+	
+	while (i < mtd->numeraseregions && instr->addr >= regions[i].offset)
+	       i++;
+	i--;
+
+	/* OK, now i is pointing at the erase region in which this 
+	   erase request starts. Check the start of the requested
+	   erase range is aligned with the erase size which is in
+	   effect here.
+	*/
+
+	if (instr->addr & (regions[i].erasesize-1))
+		return -EINVAL;
+
+	/* Remember the erase region we start on */
+	first = i;
+
+	/* Next, check that the end of the requested erase is aligned
+	 * with the erase region at that address.
+	 */
+
+	while (i<mtd->numeraseregions && (instr->addr + instr->len) >= regions[i].offset)
+		i++;
+
+	/* As before, drop back one to point at the region in which
+	   the address actually falls
+	*/
+	i--;
+	
+	if ((instr->addr + instr->len) & (regions[i].erasesize-1))
+		return -EINVAL;
+
+	chipnum = instr->addr >> cfi->chipshift;
+	adr = instr->addr - (chipnum << cfi->chipshift);
+	len = instr->len;
+
+	i=first;
+
+	while(len) {
+		ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr);
+		
+		if (ret)
+			return ret;
+
+		adr += regions[i].erasesize;
+		len -= regions[i].erasesize;
+
+		if (adr % (1<< cfi->chipshift) == ((regions[i].offset + (regions[i].erasesize * regions[i].numblocks)) %( 1<< cfi->chipshift)))
+			i++;
+
+		if (adr >> cfi->chipshift) {
+			adr = 0;
+			chipnum++;
+			
+			if (chipnum >= cfi->numchips)
+			break;
+		}
+	}
+		
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+	
+	return 0;
+}
+
+static void cfi_staa_sync (struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+	DECLARE_WAITQUEUE(wait, current);
+
+	for (i=0; !ret && i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+
+	retry:
+		spin_lock_bh(chip->mutex);
+
+		switch(chip->state) {
+		case FL_READY:
+		case FL_STATUS:
+		case FL_CFI_QUERY:
+		case FL_JEDEC_QUERY:
+			chip->oldstate = chip->state;
+			chip->state = FL_SYNCING;
+			/* No need to wake_up() on this state change - 
+			 * as the whole point is that nobody can do anything
+			 * with the chip now anyway.
+			 */
+		case FL_SYNCING:
+			spin_unlock_bh(chip->mutex);
+			break;
+
+		default:
+			/* Not an idle state */
+			add_wait_queue(&chip->wq, &wait);
+			
+			spin_unlock_bh(chip->mutex);
+			schedule();
+		        remove_wait_queue(&chip->wq, &wait);
+			
+			goto retry;
+		}
+	}
+
+	/* Unlock the chips again */
+
+	for (i--; i >=0; i--) {
+		chip = &cfi->chips[i];
+
+		spin_lock_bh(chip->mutex);
+		
+		if (chip->state == FL_SYNCING) {
+			chip->state = chip->oldstate;
+			wake_up(&chip->wq);
+		}
+		spin_unlock_bh(chip->mutex);
+	}
+}
+
+static inline int do_lock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long timeo = jiffies + HZ;
+	DECLARE_WAITQUEUE(wait, current);
+
+	adr += chip->start;
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	timeo = jiffies + HZ;
+retry:
+	spin_lock_bh(chip->mutex);
+
+	/* Check that the chip's ready to talk to us. */
+	switch (chip->state) {
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+	case FL_READY:
+		map_write(map, CMD(0x70), adr);
+		chip->state = FL_STATUS;
+
+	case FL_STATUS:
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK)) 
+			break;
+		
+		/* Urgh. Chip not yet ready to talk to us. */
+		if (time_after(jiffies, timeo)) {
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_ERR "waiting for chip to be ready timed out in lock\n");
+			return -EIO;
+		}
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		goto retry;
+
+	default:
+		/* Stick ourselves on a wait queue to be woken when
+		   someone changes the status */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		spin_unlock_bh(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		timeo = jiffies + HZ;
+		goto retry;
+	}
+
+	ENABLE_VPP(map);
+	map_write(map, CMD(0x60), adr);
+	map_write(map, CMD(0x01), adr);
+	chip->state = FL_LOCKING;
+	
+	spin_unlock_bh(chip->mutex);
+	msleep(1000);
+	spin_lock_bh(chip->mutex);
+
+	/* FIXME. Use a timer to check this, and return immediately. */
+	/* Once the state machine's known to be working I'll do that */
+
+	timeo = jiffies + (HZ*2);
+	for (;;) {
+
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			map_write(map, CMD(0x70), adr);
+			chip->state = FL_STATUS;
+			printk(KERN_ERR "waiting for lock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]);
+			DISABLE_VPP(map);
+			spin_unlock_bh(chip->mutex);
+			return -EIO;
+		}
+		
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		spin_lock_bh(chip->mutex);
+	}
+	
+	/* Done and happy. */
+	chip->state = FL_STATUS;
+	DISABLE_VPP(map);
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+	return 0;
+}
+static int cfi_staa_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long adr;
+	int chipnum, ret = 0;
+#ifdef DEBUG_LOCK_BITS
+	int ofs_factor = cfi->interleave * cfi->device_type;
+#endif
+
+	if (ofs & (mtd->erasesize - 1))
+		return -EINVAL;
+
+	if (len & (mtd->erasesize -1))
+		return -EINVAL;
+
+	if ((len + ofs) > mtd->size)
+		return -EINVAL;
+
+	chipnum = ofs >> cfi->chipshift;
+	adr = ofs - (chipnum << cfi->chipshift);
+
+	while(len) {
+
+#ifdef DEBUG_LOCK_BITS
+		cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL);
+		printk("before lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor)));
+		cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL);
+#endif
+
+		ret = do_lock_oneblock(map, &cfi->chips[chipnum], adr);
+
+#ifdef DEBUG_LOCK_BITS
+		cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL);
+		printk("after lock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor)));
+		cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL);
+#endif	
+		
+		if (ret)
+			return ret;
+
+		adr += mtd->erasesize;
+		len -= mtd->erasesize;
+
+		if (adr >> cfi->chipshift) {
+			adr = 0;
+			chipnum++;
+			
+			if (chipnum >= cfi->numchips)
+			break;
+		}
+	}
+	return 0;
+}
+static inline int do_unlock_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	map_word status, status_OK;
+	unsigned long timeo = jiffies + HZ;
+	DECLARE_WAITQUEUE(wait, current);
+
+	adr += chip->start;
+
+	/* Let's determine this according to the interleave only once */
+	status_OK = CMD(0x80);
+
+	timeo = jiffies + HZ;
+retry:
+	spin_lock_bh(chip->mutex);
+
+	/* Check that the chip's ready to talk to us. */
+	switch (chip->state) {
+	case FL_CFI_QUERY:
+	case FL_JEDEC_QUERY:
+	case FL_READY:
+		map_write(map, CMD(0x70), adr);
+		chip->state = FL_STATUS;
+
+	case FL_STATUS:
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* Urgh. Chip not yet ready to talk to us. */
+		if (time_after(jiffies, timeo)) {
+			spin_unlock_bh(chip->mutex);
+			printk(KERN_ERR "waiting for chip to be ready timed out in unlock\n");
+			return -EIO;
+		}
+
+		/* Latency issues. Drop the lock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		goto retry;
+
+	default:
+		/* Stick ourselves on a wait queue to be woken when
+		   someone changes the status */
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+		spin_unlock_bh(chip->mutex);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+		timeo = jiffies + HZ;
+		goto retry;
+	}
+
+	ENABLE_VPP(map);
+	map_write(map, CMD(0x60), adr);
+	map_write(map, CMD(0xD0), adr);
+	chip->state = FL_UNLOCKING;
+	
+	spin_unlock_bh(chip->mutex);
+	msleep(1000);
+	spin_lock_bh(chip->mutex);
+
+	/* FIXME. Use a timer to check this, and return immediately. */
+	/* Once the state machine's known to be working I'll do that */
+
+	timeo = jiffies + (HZ*2);
+	for (;;) {
+
+		status = map_read(map, adr);
+		if (map_word_andequal(map, status, status_OK, status_OK))
+			break;
+		
+		/* OK Still waiting */
+		if (time_after(jiffies, timeo)) {
+			map_write(map, CMD(0x70), adr);
+			chip->state = FL_STATUS;
+			printk(KERN_ERR "waiting for unlock to complete timed out. Xstatus = %lx, status = %lx.\n", status.x[0], map_read(map, adr).x[0]);
+			DISABLE_VPP(map);
+			spin_unlock_bh(chip->mutex);
+			return -EIO;
+		}
+		
+		/* Latency issues. Drop the unlock, wait a while and retry */
+		spin_unlock_bh(chip->mutex);
+		cfi_udelay(1);
+		spin_lock_bh(chip->mutex);
+	}
+	
+	/* Done and happy. */
+	chip->state = FL_STATUS;
+	DISABLE_VPP(map);
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+	return 0;
+}
+static int cfi_staa_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long adr;
+	int chipnum, ret = 0;
+#ifdef DEBUG_LOCK_BITS
+	int ofs_factor = cfi->interleave * cfi->device_type;
+#endif
+
+	chipnum = ofs >> cfi->chipshift;
+	adr = ofs - (chipnum << cfi->chipshift);
+
+#ifdef DEBUG_LOCK_BITS
+	{
+		unsigned long temp_adr = adr;
+		unsigned long temp_len = len;
+                 
+		cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL);
+                while (temp_len) {
+			printk("before unlock %x: block status register is %x\n",temp_adr,cfi_read_query(map, temp_adr+(2*ofs_factor)));
+			temp_adr += mtd->erasesize;
+			temp_len -= mtd->erasesize;
+		}
+		cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL);
+	}
+#endif
+
+	ret = do_unlock_oneblock(map, &cfi->chips[chipnum], adr);
+
+#ifdef DEBUG_LOCK_BITS
+	cfi_send_gen_cmd(0x90, 0x55, 0, map, cfi, cfi->device_type, NULL);
+	printk("after unlock: block status register is %x\n",cfi_read_query(map, adr+(2*ofs_factor)));
+	cfi_send_gen_cmd(0xff, 0x55, 0, map, cfi, cfi->device_type, NULL);
+#endif
+	
+	return ret;
+}
+
+static int cfi_staa_suspend(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+	int ret = 0;
+
+	for (i=0; !ret && i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+
+		spin_lock_bh(chip->mutex);
+
+		switch(chip->state) {
+		case FL_READY:
+		case FL_STATUS:
+		case FL_CFI_QUERY:
+		case FL_JEDEC_QUERY:
+			chip->oldstate = chip->state;
+			chip->state = FL_PM_SUSPENDED;
+			/* No need to wake_up() on this state change - 
+			 * as the whole point is that nobody can do anything
+			 * with the chip now anyway.
+			 */
+		case FL_PM_SUSPENDED:
+			break;
+
+		default:
+			ret = -EAGAIN;
+			break;
+		}
+		spin_unlock_bh(chip->mutex);
+	}
+
+	/* Unlock the chips again */
+
+	if (ret) {
+		for (i--; i >=0; i--) {
+			chip = &cfi->chips[i];
+			
+			spin_lock_bh(chip->mutex);
+			
+			if (chip->state == FL_PM_SUSPENDED) {
+				/* No need to force it into a known state here,
+				   because we're returning failure, and it didn't
+				   get power cycled */
+				chip->state = chip->oldstate;
+				wake_up(&chip->wq);
+			}
+			spin_unlock_bh(chip->mutex);
+		}
+	} 
+	
+	return ret;
+}
+
+static void cfi_staa_resume(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+
+	for (i=0; i<cfi->numchips; i++) {
+	
+		chip = &cfi->chips[i];
+
+		spin_lock_bh(chip->mutex);
+		
+		/* Go to known state. Chip may have been power cycled */
+		if (chip->state == FL_PM_SUSPENDED) {
+			map_write(map, CMD(0xFF), 0);
+			chip->state = FL_READY;
+			wake_up(&chip->wq);
+		}
+
+		spin_unlock_bh(chip->mutex);
+	}
+}
+
+static void cfi_staa_destroy(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	kfree(cfi->cmdset_priv);
+	kfree(cfi);
+}
+
+static char im_name[]="cfi_cmdset_0020";
+
+static int __init cfi_staa_init(void)
+{
+	inter_module_register(im_name, THIS_MODULE, &cfi_cmdset_0020);
+	return 0;
+}
+
+static void __exit cfi_staa_exit(void)
+{
+	inter_module_unregister(im_name);
+}
+
+module_init(cfi_staa_init);
+module_exit(cfi_staa_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c
new file mode 100644
index 000000000000..cf750038ce6a
--- /dev/null
+++ b/drivers/mtd/chips/cfi_probe.c
@@ -0,0 +1,445 @@
+/* 
+   Common Flash Interface probe code.
+   (C) 2000 Red Hat. GPL'd.
+   $Id: cfi_probe.c,v 1.83 2004/11/16 18:19:02 nico Exp $
+*/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+
+#include <linux/mtd/xip.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/cfi.h>
+#include <linux/mtd/gen_probe.h>
+
+//#define DEBUG_CFI 
+
+#ifdef DEBUG_CFI
+static void print_cfi_ident(struct cfi_ident *);
+#endif
+
+static int cfi_probe_chip(struct map_info *map, __u32 base,
+			  unsigned long *chip_map, struct cfi_private *cfi);
+static int cfi_chip_setup(struct map_info *map, struct cfi_private *cfi);
+
+struct mtd_info *cfi_probe(struct map_info *map);
+
+#ifdef CONFIG_MTD_XIP
+
+/* only needed for short periods, so this is rather simple */
+#define xip_disable()	local_irq_disable()
+
+#define xip_allowed(base, map) \
+do { \
+	(void) map_read(map, base); \
+	asm volatile (".rep 8; nop; .endr"); \
+	local_irq_enable(); \
+} while (0)
+
+#define xip_enable(base, map, cfi) \
+do { \
+	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL); \
+	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL); \
+	xip_allowed(base, map); \
+} while (0)
+
+#define xip_disable_qry(base, map, cfi) \
+do { \
+	xip_disable(); \
+	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL); \
+	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL); \
+	cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL); \
+} while (0)
+
+#else
+
+#define xip_disable()			do { } while (0)
+#define xip_allowed(base, map)		do { } while (0)
+#define xip_enable(base, map, cfi)	do { } while (0)
+#define xip_disable_qry(base, map, cfi) do { } while (0)
+
+#endif
+
+/* check for QRY.
+   in: interleave,type,mode
+   ret: table index, <0 for error
+ */
+static int __xipram qry_present(struct map_info *map, __u32 base,
+				struct cfi_private *cfi)
+{
+	int osf = cfi->interleave * cfi->device_type;	// scale factor
+	map_word val[3];
+	map_word qry[3];
+
+	qry[0] = cfi_build_cmd('Q', map, cfi);
+	qry[1] = cfi_build_cmd('R', map, cfi);
+	qry[2] = cfi_build_cmd('Y', map, cfi);
+
+	val[0] = map_read(map, base + osf*0x10);
+	val[1] = map_read(map, base + osf*0x11);
+	val[2] = map_read(map, base + osf*0x12);
+
+	if (!map_word_equal(map, qry[0], val[0]))
+		return 0;
+
+	if (!map_word_equal(map, qry[1], val[1]))
+		return 0;
+
+	if (!map_word_equal(map, qry[2], val[2]))
+		return 0;
+
+	return 1; 	// "QRY" found
+}
+
+static int __xipram cfi_probe_chip(struct map_info *map, __u32 base,
+				   unsigned long *chip_map, struct cfi_private *cfi)
+{
+	int i;
+	
+	if ((base + 0) >= map->size) {
+		printk(KERN_NOTICE
+			"Probe at base[0x00](0x%08lx) past the end of the map(0x%08lx)\n",
+			(unsigned long)base, map->size -1);
+		return 0;
+	}
+	if ((base + 0xff) >= map->size) {
+		printk(KERN_NOTICE
+			"Probe at base[0x55](0x%08lx) past the end of the map(0x%08lx)\n",
+			(unsigned long)base + 0x55, map->size -1);
+		return 0;
+	}
+
+	xip_disable();
+	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL);
+
+	if (!qry_present(map,base,cfi)) {
+		xip_enable(base, map, cfi);
+		return 0;
+	}
+
+	if (!cfi->numchips) {
+		/* This is the first time we're called. Set up the CFI 
+		   stuff accordingly and return */
+		return cfi_chip_setup(map, cfi);
+	}
+
+	/* Check each previous chip to see if it's an alias */
+ 	for (i=0; i < (base >> cfi->chipshift); i++) {
+ 		unsigned long start;
+ 		if(!test_bit(i, chip_map)) {
+			/* Skip location; no valid chip at this address */
+ 			continue; 
+ 		}
+ 		start = i << cfi->chipshift;
+		/* This chip should be in read mode if it's one
+		   we've already touched. */
+		if (qry_present(map, start, cfi)) {
+			/* Eep. This chip also had the QRY marker. 
+			 * Is it an alias for the new one? */
+			cfi_send_gen_cmd(0xF0, 0, start, map, cfi, cfi->device_type, NULL);
+			cfi_send_gen_cmd(0xFF, 0, start, map, cfi, cfi->device_type, NULL);
+
+			/* If the QRY marker goes away, it's an alias */
+			if (!qry_present(map, start, cfi)) {
+				xip_allowed(base, map);
+				printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n",
+				       map->name, base, start);
+				return 0;
+			}
+			/* Yes, it's actually got QRY for data. Most 
+			 * unfortunate. Stick the new chip in read mode
+			 * too and if it's the same, assume it's an alias. */
+			/* FIXME: Use other modes to do a proper check */
+			cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
+			cfi_send_gen_cmd(0xFF, 0, start, map, cfi, cfi->device_type, NULL);
+			
+			if (qry_present(map, base, cfi)) {
+				xip_allowed(base, map);
+				printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n",
+				       map->name, base, start);
+				return 0;
+			}
+		}
+	}
+	
+	/* OK, if we got to here, then none of the previous chips appear to
+	   be aliases for the current one. */
+	set_bit((base >> cfi->chipshift), chip_map); /* Update chip map */
+	cfi->numchips++;
+	
+	/* Put it back into Read Mode */
+	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
+	xip_allowed(base, map);
+
+	printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n",
+	       map->name, cfi->interleave, cfi->device_type*8, base,
+	       map->bankwidth*8);
+	
+	return 1;
+}
+
+static int __xipram cfi_chip_setup(struct map_info *map, 
+				   struct cfi_private *cfi)
+{
+	int ofs_factor = cfi->interleave*cfi->device_type;
+	__u32 base = 0;
+	int num_erase_regions = cfi_read_query(map, base + (0x10 + 28)*ofs_factor);
+	int i;
+
+	xip_enable(base, map, cfi);
+#ifdef DEBUG_CFI
+	printk("Number of erase regions: %d\n", num_erase_regions);
+#endif
+	if (!num_erase_regions)
+		return 0;
+
+	cfi->cfiq = kmalloc(sizeof(struct cfi_ident) + num_erase_regions * 4, GFP_KERNEL);
+	if (!cfi->cfiq) {
+		printk(KERN_WARNING "%s: kmalloc failed for CFI ident structure\n", map->name);
+		return 0;
+	}
+	
+	memset(cfi->cfiq,0,sizeof(struct cfi_ident));	
+	
+	cfi->cfi_mode = CFI_MODE_CFI;
+	
+	/* Read the CFI info structure */
+	xip_disable_qry(base, map, cfi);
+	for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++)
+		((unsigned char *)cfi->cfiq)[i] = cfi_read_query(map,base + (0x10 + i)*ofs_factor);
+
+	/* Note we put the device back into Read Mode BEFORE going into Auto
+	 * Select Mode, as some devices support nesting of modes, others
+	 * don't. This way should always work.
+	 * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and
+	 * so should be treated as nops or illegal (and so put the device
+	 * back into Read Mode, which is a nop in this case).
+	 */
+	cfi_send_gen_cmd(0xf0,     0, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xaa, 0x555, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, 0x2aa, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x90, 0x555, base, map, cfi, cfi->device_type, NULL);
+	cfi->mfr = cfi_read_query(map, base);
+	cfi->id = cfi_read_query(map, base + ofs_factor);    
+
+	/* Put it back into Read Mode */
+	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
+	/* ... even if it's an Intel chip */
+	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
+	xip_allowed(base, map);
+
+	/* Do any necessary byteswapping */
+	cfi->cfiq->P_ID = le16_to_cpu(cfi->cfiq->P_ID);
+
+	cfi->cfiq->P_ADR = le16_to_cpu(cfi->cfiq->P_ADR);
+	cfi->cfiq->A_ID = le16_to_cpu(cfi->cfiq->A_ID);
+	cfi->cfiq->A_ADR = le16_to_cpu(cfi->cfiq->A_ADR);
+	cfi->cfiq->InterfaceDesc = le16_to_cpu(cfi->cfiq->InterfaceDesc);
+	cfi->cfiq->MaxBufWriteSize = le16_to_cpu(cfi->cfiq->MaxBufWriteSize);
+
+#ifdef DEBUG_CFI
+	/* Dump the information therein */
+	print_cfi_ident(cfi->cfiq);
+#endif
+
+	for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
+		cfi->cfiq->EraseRegionInfo[i] = le32_to_cpu(cfi->cfiq->EraseRegionInfo[i]);
+		
+#ifdef DEBUG_CFI		
+		printk("  Erase Region #%d: BlockSize 0x%4.4X bytes, %d blocks\n",
+		       i, (cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff, 
+		       (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1);
+#endif
+	}
+
+	printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n",
+	       map->name, cfi->interleave, cfi->device_type*8, base,
+	       map->bankwidth*8);
+
+	return 1;
+}
+
+#ifdef DEBUG_CFI
+static char *vendorname(__u16 vendor) 
+{
+	switch (vendor) {
+	case P_ID_NONE:
+		return "None";
+		
+	case P_ID_INTEL_EXT:
+		return "Intel/Sharp Extended";
+		
+	case P_ID_AMD_STD:
+		return "AMD/Fujitsu Standard";
+		
+	case P_ID_INTEL_STD:
+		return "Intel/Sharp Standard";
+		
+	case P_ID_AMD_EXT:
+		return "AMD/Fujitsu Extended";
+
+	case P_ID_WINBOND:
+		return "Winbond Standard";
+		
+	case P_ID_ST_ADV:
+		return "ST Advanced";
+
+	case P_ID_MITSUBISHI_STD:
+		return "Mitsubishi Standard";
+		
+	case P_ID_MITSUBISHI_EXT:
+		return "Mitsubishi Extended";
+
+	case P_ID_SST_PAGE:
+		return "SST Page Write";
+
+	case P_ID_INTEL_PERFORMANCE:
+		return "Intel Performance Code";
+		
+	case P_ID_INTEL_DATA:
+		return "Intel Data";
+		
+	case P_ID_RESERVED:
+		return "Not Allowed / Reserved for Future Use";
+		
+	default:
+		return "Unknown";
+	}
+}
+
+
+static void print_cfi_ident(struct cfi_ident *cfip)
+{
+#if 0
+	if (cfip->qry[0] != 'Q' || cfip->qry[1] != 'R' || cfip->qry[2] != 'Y') {
+		printk("Invalid CFI ident structure.\n");
+		return;
+	}	
+#endif		
+	printk("Primary Vendor Command Set: %4.4X (%s)\n", cfip->P_ID, vendorname(cfip->P_ID));
+	if (cfip->P_ADR)
+		printk("Primary Algorithm Table at %4.4X\n", cfip->P_ADR);
+	else
+		printk("No Primary Algorithm Table\n");
+	
+	printk("Alternative Vendor Command Set: %4.4X (%s)\n", cfip->A_ID, vendorname(cfip->A_ID));
+	if (cfip->A_ADR)
+		printk("Alternate Algorithm Table at %4.4X\n", cfip->A_ADR);
+	else
+		printk("No Alternate Algorithm Table\n");
+		
+		
+	printk("Vcc Minimum: %2d.%d V\n", cfip->VccMin >> 4, cfip->VccMin & 0xf);
+	printk("Vcc Maximum: %2d.%d V\n", cfip->VccMax >> 4, cfip->VccMax & 0xf);
+	if (cfip->VppMin) {
+		printk("Vpp Minimum: %2d.%d V\n", cfip->VppMin >> 4, cfip->VppMin & 0xf);
+		printk("Vpp Maximum: %2d.%d V\n", cfip->VppMax >> 4, cfip->VppMax & 0xf);
+	}
+	else
+		printk("No Vpp line\n");
+	
+	printk("Typical byte/word write timeout: %d µs\n", 1<<cfip->WordWriteTimeoutTyp);
+	printk("Maximum byte/word write timeout: %d µs\n", (1<<cfip->WordWriteTimeoutMax) * (1<<cfip->WordWriteTimeoutTyp));
+	
+	if (cfip->BufWriteTimeoutTyp || cfip->BufWriteTimeoutMax) {
+		printk("Typical full buffer write timeout: %d µs\n", 1<<cfip->BufWriteTimeoutTyp);
+		printk("Maximum full buffer write timeout: %d µs\n", (1<<cfip->BufWriteTimeoutMax) * (1<<cfip->BufWriteTimeoutTyp));
+	}
+	else
+		printk("Full buffer write not supported\n");
+	
+	printk("Typical block erase timeout: %d ms\n", 1<<cfip->BlockEraseTimeoutTyp);
+	printk("Maximum block erase timeout: %d ms\n", (1<<cfip->BlockEraseTimeoutMax) * (1<<cfip->BlockEraseTimeoutTyp));
+	if (cfip->ChipEraseTimeoutTyp || cfip->ChipEraseTimeoutMax) {
+		printk("Typical chip erase timeout: %d ms\n", 1<<cfip->ChipEraseTimeoutTyp); 
+		printk("Maximum chip erase timeout: %d ms\n", (1<<cfip->ChipEraseTimeoutMax) * (1<<cfip->ChipEraseTimeoutTyp));
+	}
+	else
+		printk("Chip erase not supported\n");
+	
+	printk("Device size: 0x%X bytes (%d MiB)\n", 1 << cfip->DevSize, 1<< (cfip->DevSize - 20));
+	printk("Flash Device Interface description: 0x%4.4X\n", cfip->InterfaceDesc);
+	switch(cfip->InterfaceDesc) {
+	case 0:
+		printk("  - x8-only asynchronous interface\n");
+		break;
+		
+	case 1:
+		printk("  - x16-only asynchronous interface\n");
+		break;
+		
+	case 2:
+		printk("  - supports x8 and x16 via BYTE# with asynchronous interface\n");
+		break;
+		
+	case 3:
+		printk("  - x32-only asynchronous interface\n");
+		break;
+		
+	case 4:
+		printk("  - supports x16 and x32 via Word# with asynchronous interface\n");
+		break;
+		
+	case 65535:
+		printk("  - Not Allowed / Reserved\n");
+		break;
+		
+	default:
+		printk("  - Unknown\n");
+		break;
+	}
+	
+	printk("Max. bytes in buffer write: 0x%x\n", 1<< cfip->MaxBufWriteSize);
+	printk("Number of Erase Block Regions: %d\n", cfip->NumEraseRegions);
+	
+}
+#endif /* DEBUG_CFI */
+
+static struct chip_probe cfi_chip_probe = {
+	.name		= "CFI",
+	.probe_chip	= cfi_probe_chip
+};
+
+struct mtd_info *cfi_probe(struct map_info *map)
+{
+	/*
+	 * Just use the generic probe stuff to call our CFI-specific
+	 * chip_probe routine in all the possible permutations, etc.
+	 */
+	return mtd_do_chip_probe(map, &cfi_chip_probe);
+}
+
+static struct mtd_chip_driver cfi_chipdrv = {
+	.probe		= cfi_probe,
+	.name		= "cfi_probe",
+	.module		= THIS_MODULE
+};
+
+int __init cfi_probe_init(void)
+{
+	register_mtd_chip_driver(&cfi_chipdrv);
+	return 0;
+}
+
+static void __exit cfi_probe_exit(void)
+{
+	unregister_mtd_chip_driver(&cfi_chipdrv);
+}
+
+module_init(cfi_probe_init);
+module_exit(cfi_probe_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al.");
+MODULE_DESCRIPTION("Probe code for CFI-compliant flash chips");
diff --git a/drivers/mtd/chips/cfi_util.c b/drivers/mtd/chips/cfi_util.c
new file mode 100644
index 000000000000..2b2ede2bfcca
--- /dev/null
+++ b/drivers/mtd/chips/cfi_util.c
@@ -0,0 +1,196 @@
+/*
+ * Common Flash Interface support:
+ *   Generic utility functions not dependant on command set
+ *
+ * Copyright (C) 2002 Red Hat
+ * Copyright (C) 2003 STMicroelectronics Limited
+ *
+ * This code is covered by the GPL.
+ *
+ * $Id: cfi_util.c,v 1.8 2004/12/14 19:55:56 nico Exp $
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/xip.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/cfi.h>
+#include <linux/mtd/compatmac.h>
+
+struct cfi_extquery *
+__xipram cfi_read_pri(struct map_info *map, __u16 adr, __u16 size, const char* name)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	__u32 base = 0; // cfi->chips[0].start;
+	int ofs_factor = cfi->interleave * cfi->device_type;
+	int i;
+	struct cfi_extquery *extp = NULL;
+
+	printk(" %s Extended Query Table at 0x%4.4X\n", name, adr);
+	if (!adr)
+		goto out;
+
+	extp = kmalloc(size, GFP_KERNEL);
+	if (!extp) {
+		printk(KERN_ERR "Failed to allocate memory\n");
+		goto out;
+	}
+
+#ifdef CONFIG_MTD_XIP
+	local_irq_disable();
+#endif
+
+	/* Switch it into Query Mode */
+	cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL);
+
+	/* Read in the Extended Query Table */
+	for (i=0; i<size; i++) {
+		((unsigned char *)extp)[i] = 
+			cfi_read_query(map, base+((adr+i)*ofs_factor));
+	}
+
+	/* Make sure it returns to read mode */
+	cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xff, 0, base, map, cfi, cfi->device_type, NULL);
+
+#ifdef CONFIG_MTD_XIP
+	(void) map_read(map, base);
+	asm volatile (".rep 8; nop; .endr");
+	local_irq_enable();
+#endif
+
+	if (extp->MajorVersion != '1' || 
+	    (extp->MinorVersion < '0' || extp->MinorVersion > '3')) {
+		printk(KERN_WARNING "  Unknown %s Extended Query "
+		       "version %c.%c.\n",  name, extp->MajorVersion,
+		       extp->MinorVersion);
+		kfree(extp);
+		extp = NULL;
+	}
+
+ out:	return extp;
+}
+
+EXPORT_SYMBOL(cfi_read_pri);
+
+void cfi_fixup(struct mtd_info *mtd, struct cfi_fixup *fixups)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct cfi_fixup *f;
+
+	for (f=fixups; f->fixup; f++) {
+		if (((f->mfr == CFI_MFR_ANY) || (f->mfr == cfi->mfr)) &&
+		    ((f->id  == CFI_ID_ANY)  || (f->id  == cfi->id))) {
+			f->fixup(mtd, f->param);
+		}
+	}
+}
+
+EXPORT_SYMBOL(cfi_fixup);
+
+int cfi_varsize_frob(struct mtd_info *mtd, varsize_frob_t frob,
+				     loff_t ofs, size_t len, void *thunk)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	unsigned long adr;
+	int chipnum, ret = 0;
+	int i, first;
+	struct mtd_erase_region_info *regions = mtd->eraseregions;
+
+	if (ofs > mtd->size)
+		return -EINVAL;
+
+	if ((len + ofs) > mtd->size)
+		return -EINVAL;
+
+	/* Check that both start and end of the requested erase are
+	 * aligned with the erasesize at the appropriate addresses.
+	 */
+
+	i = 0;
+
+	/* Skip all erase regions which are ended before the start of 
+	   the requested erase. Actually, to save on the calculations,
+	   we skip to the first erase region which starts after the
+	   start of the requested erase, and then go back one.
+	*/
+	
+	while (i < mtd->numeraseregions && ofs >= regions[i].offset)
+	       i++;
+	i--;
+
+	/* OK, now i is pointing at the erase region in which this 
+	   erase request starts. Check the start of the requested
+	   erase range is aligned with the erase size which is in
+	   effect here.
+	*/
+
+	if (ofs & (regions[i].erasesize-1))
+		return -EINVAL;
+
+	/* Remember the erase region we start on */
+	first = i;
+
+	/* Next, check that the end of the requested erase is aligned
+	 * with the erase region at that address.
+	 */
+
+	while (i<mtd->numeraseregions && (ofs + len) >= regions[i].offset)
+		i++;
+
+	/* As before, drop back one to point at the region in which
+	   the address actually falls
+	*/
+	i--;
+	
+	if ((ofs + len) & (regions[i].erasesize-1))
+		return -EINVAL;
+
+	chipnum = ofs >> cfi->chipshift;
+	adr = ofs - (chipnum << cfi->chipshift);
+
+	i=first;
+
+	while(len) {
+		int size = regions[i].erasesize;
+
+		ret = (*frob)(map, &cfi->chips[chipnum], adr, size, thunk);
+		
+		if (ret)
+			return ret;
+
+		adr += size;
+		ofs += size;
+		len -= size;
+
+		if (ofs == regions[i].offset + size * regions[i].numblocks)
+			i++;
+
+		if (adr >> cfi->chipshift) {
+			adr = 0;
+			chipnum++;
+			
+			if (chipnum >= cfi->numchips)
+			break;
+		}
+	}
+
+	return 0;
+}
+
+EXPORT_SYMBOL(cfi_varsize_frob);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/chips/chipreg.c b/drivers/mtd/chips/chipreg.c
new file mode 100644
index 000000000000..d7d739a108ae
--- /dev/null
+++ b/drivers/mtd/chips/chipreg.c
@@ -0,0 +1,111 @@
+/*
+ * $Id: chipreg.c,v 1.17 2004/11/16 18:29:00 dwmw2 Exp $
+ *
+ * Registration for chip drivers
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/compatmac.h>
+
+static DEFINE_SPINLOCK(chip_drvs_lock);
+static LIST_HEAD(chip_drvs_list);
+
+void register_mtd_chip_driver(struct mtd_chip_driver *drv)
+{
+	spin_lock(&chip_drvs_lock);
+	list_add(&drv->list, &chip_drvs_list);
+	spin_unlock(&chip_drvs_lock);
+}
+
+void unregister_mtd_chip_driver(struct mtd_chip_driver *drv)
+{
+	spin_lock(&chip_drvs_lock);
+	list_del(&drv->list);
+	spin_unlock(&chip_drvs_lock);
+}
+
+static struct mtd_chip_driver *get_mtd_chip_driver (const char *name)
+{
+	struct list_head *pos;
+	struct mtd_chip_driver *ret = NULL, *this;
+
+	spin_lock(&chip_drvs_lock);
+
+	list_for_each(pos, &chip_drvs_list) {
+		this = list_entry(pos, typeof(*this), list);
+		
+		if (!strcmp(this->name, name)) {
+			ret = this;
+			break;
+		}
+	}
+	if (ret && !try_module_get(ret->module))
+		ret = NULL;
+
+	spin_unlock(&chip_drvs_lock);
+
+	return ret;
+}
+
+	/* Hide all the horrid details, like some silly person taking
+	   get_module_symbol() away from us, from the caller. */
+
+struct mtd_info *do_map_probe(const char *name, struct map_info *map)
+{
+	struct mtd_chip_driver *drv;
+	struct mtd_info *ret;
+
+	drv = get_mtd_chip_driver(name);
+
+	if (!drv && !request_module("%s", name))
+		drv = get_mtd_chip_driver(name);
+
+	if (!drv)
+		return NULL;
+
+	ret = drv->probe(map);
+
+	/* We decrease the use count here. It may have been a 
+	   probe-only module, which is no longer required from this
+	   point, having given us a handle on (and increased the use
+	   count of) the actual driver code.
+	*/
+	module_put(drv->module);
+
+	if (ret)
+		return ret;
+	
+	return NULL;
+}
+/*
+ * Destroy an MTD device which was created for a map device.
+ * Make sure the MTD device is already unregistered before calling this
+ */
+void map_destroy(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+
+	if (map->fldrv->destroy)
+		map->fldrv->destroy(mtd);
+
+	module_put(map->fldrv->module);
+
+	kfree(mtd);
+}
+
+EXPORT_SYMBOL(register_mtd_chip_driver);
+EXPORT_SYMBOL(unregister_mtd_chip_driver);
+EXPORT_SYMBOL(do_map_probe);
+EXPORT_SYMBOL(map_destroy);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("Core routines for registering and invoking MTD chip drivers");
diff --git a/drivers/mtd/chips/fwh_lock.h b/drivers/mtd/chips/fwh_lock.h
new file mode 100644
index 000000000000..fbf44708a861
--- /dev/null
+++ b/drivers/mtd/chips/fwh_lock.h
@@ -0,0 +1,107 @@
+#ifndef FWH_LOCK_H
+#define FWH_LOCK_H
+
+
+enum fwh_lock_state {
+        FWH_UNLOCKED   = 0,
+	FWH_DENY_WRITE = 1,
+	FWH_IMMUTABLE  = 2,
+	FWH_DENY_READ  = 4,
+};
+
+struct fwh_xxlock_thunk {
+	enum fwh_lock_state val;
+	flstate_t state;
+};
+
+
+#define FWH_XXLOCK_ONEBLOCK_LOCK   ((struct fwh_xxlock_thunk){ FWH_DENY_WRITE, FL_LOCKING})
+#define FWH_XXLOCK_ONEBLOCK_UNLOCK ((struct fwh_xxlock_thunk){ FWH_UNLOCKED,   FL_UNLOCKING})
+
+/*
+ * This locking/unlock is specific to firmware hub parts.  Only one
+ * is known that supports the Intel command set.    Firmware
+ * hub parts cannot be interleaved as they are on the LPC bus
+ * so this code has not been tested with interleaved chips,
+ * and will likely fail in that context.
+ */
+static int fwh_xxlock_oneblock(struct map_info *map, struct flchip *chip, 
+	unsigned long adr, int len, void *thunk)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	struct fwh_xxlock_thunk *xxlt = (struct fwh_xxlock_thunk *)thunk;
+	int ret;
+
+	/* Refuse the operation if the we cannot look behind the chip */
+	if (chip->start < 0x400000) {
+		DEBUG( MTD_DEBUG_LEVEL3,
+			"MTD %s(): chip->start: %lx wanted >= 0x400000\n",
+			__func__, chip->start );
+		return -EIO;
+	}
+	/*
+	 * lock block registers:
+	 * - on 64k boundariesand
+	 * - bit 1 set high
+	 * - block lock registers are 4MiB lower - overflow subtract (danger)
+	 * 
+	 * The address manipulation is first done on the logical address
+	 * which is 0 at the start of the chip, and then the offset of
+	 * the individual chip is addted to it.  Any other order a weird
+	 * map offset could cause problems.
+	 */
+	adr = (adr & ~0xffffUL) | 0x2;
+	adr += chip->start - 0x400000;
+
+	/*
+	 * This is easy because these are writes to registers and not writes
+	 * to flash memory - that means that we don't have to check status
+	 * and timeout.
+	 */
+	cfi_spin_lock(chip->mutex);
+	ret = get_chip(map, chip, adr, FL_LOCKING);
+	if (ret) {
+		cfi_spin_unlock(chip->mutex);
+		return ret;
+	}
+
+	chip->state = xxlt->state;
+	map_write(map, CMD(xxlt->val), adr);
+
+	/* Done and happy. */
+	chip->state = FL_READY;
+	put_chip(map, chip, adr);
+	cfi_spin_unlock(chip->mutex);
+	return 0;
+}
+
+
+static int fwh_lock_varsize(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	int ret;
+
+	ret = cfi_varsize_frob(mtd, fwh_xxlock_oneblock, ofs, len,
+		(void *)&FWH_XXLOCK_ONEBLOCK_LOCK);
+
+	return ret;
+}
+
+
+static int fwh_unlock_varsize(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	int ret;
+
+	ret = cfi_varsize_frob(mtd, fwh_xxlock_oneblock, ofs, len,
+		(void *)&FWH_XXLOCK_ONEBLOCK_UNLOCK);
+	
+	return ret;
+}
+
+static void fixup_use_fwh_lock(struct mtd_info *mtd, void *param)
+{
+	printk(KERN_NOTICE "using fwh lock/unlock method\n");
+	/* Setup for the chips with the fwh lock method */
+	mtd->lock   = fwh_lock_varsize;
+	mtd->unlock = fwh_unlock_varsize;
+}
+#endif /* FWH_LOCK_H */
diff --git a/drivers/mtd/chips/gen_probe.c b/drivers/mtd/chips/gen_probe.c
new file mode 100644
index 000000000000..fc982c4671f0
--- /dev/null
+++ b/drivers/mtd/chips/gen_probe.c
@@ -0,0 +1,255 @@
+/*
+ * Routines common to all CFI-type probes.
+ * (C) 2001-2003 Red Hat, Inc.
+ * GPL'd
+ * $Id: gen_probe.c,v 1.21 2004/08/14 15:14:05 dwmw2 Exp $
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/cfi.h>
+#include <linux/mtd/gen_probe.h>
+
+static struct mtd_info *check_cmd_set(struct map_info *, int);
+static struct cfi_private *genprobe_ident_chips(struct map_info *map,
+						struct chip_probe *cp);
+static int genprobe_new_chip(struct map_info *map, struct chip_probe *cp,
+			     struct cfi_private *cfi);
+
+struct mtd_info *mtd_do_chip_probe(struct map_info *map, struct chip_probe *cp)
+{
+	struct mtd_info *mtd = NULL;
+	struct cfi_private *cfi;
+
+	/* First probe the map to see if we have CFI stuff there. */
+	cfi = genprobe_ident_chips(map, cp);
+	
+	if (!cfi)
+		return NULL;
+
+	map->fldrv_priv = cfi;
+	/* OK we liked it. Now find a driver for the command set it talks */
+
+	mtd = check_cmd_set(map, 1); /* First the primary cmdset */
+	if (!mtd)
+		mtd = check_cmd_set(map, 0); /* Then the secondary */
+	
+	if (mtd)
+		return mtd;
+
+	printk(KERN_WARNING"gen_probe: No supported Vendor Command Set found\n");
+	
+	kfree(cfi->cfiq);
+	kfree(cfi);
+	map->fldrv_priv = NULL;
+	return NULL;
+}
+EXPORT_SYMBOL(mtd_do_chip_probe);
+
+
+static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chip_probe *cp)
+{
+	struct cfi_private cfi;
+	struct cfi_private *retcfi;
+	unsigned long *chip_map;
+	int i, j, mapsize;
+	int max_chips;
+
+	memset(&cfi, 0, sizeof(cfi));
+
+	/* Call the probetype-specific code with all permutations of 
+	   interleave and device type, etc. */
+	if (!genprobe_new_chip(map, cp, &cfi)) {
+		/* The probe didn't like it */
+		printk(KERN_DEBUG "%s: Found no %s device at location zero\n",
+		       cp->name, map->name);
+		return NULL;
+	}		
+
+#if 0 /* Let the CFI probe routine do this sanity check. The Intel and AMD
+	 probe routines won't ever return a broken CFI structure anyway,
+	 because they make them up themselves.
+      */
+	if (cfi.cfiq->NumEraseRegions == 0) {
+		printk(KERN_WARNING "Number of erase regions is zero\n");
+		kfree(cfi.cfiq);
+		return NULL;
+	}
+#endif
+	cfi.chipshift = cfi.cfiq->DevSize;
+
+	if (cfi_interleave_is_1(&cfi)) {
+		;
+	} else if (cfi_interleave_is_2(&cfi)) {
+		cfi.chipshift++;
+	} else if (cfi_interleave_is_4((&cfi))) {
+		cfi.chipshift += 2;
+	} else if (cfi_interleave_is_8(&cfi)) {
+		cfi.chipshift += 3;
+	} else {
+		BUG();
+	}
+		
+	cfi.numchips = 1;
+
+	/* 
+	 * Allocate memory for bitmap of valid chips. 
+	 * Align bitmap storage size to full byte. 
+	 */ 
+	max_chips = map->size >> cfi.chipshift;
+	mapsize = (max_chips / 8) + ((max_chips % 8) ? 1 : 0);
+	chip_map = kmalloc(mapsize, GFP_KERNEL);
+	if (!chip_map) {
+		printk(KERN_WARNING "%s: kmalloc failed for CFI chip map\n", map->name);
+		kfree(cfi.cfiq);
+		return NULL;
+	}
+	memset (chip_map, 0, mapsize);
+
+	set_bit(0, chip_map); /* Mark first chip valid */
+
+	/*
+	 * Now probe for other chips, checking sensibly for aliases while
+	 * we're at it. The new_chip probe above should have let the first
+	 * chip in read mode.
+	 */
+
+	for (i = 1; i < max_chips; i++) {
+		cp->probe_chip(map, i << cfi.chipshift, chip_map, &cfi);
+	}
+
+	/*
+	 * Now allocate the space for the structures we need to return to 
+	 * our caller, and copy the appropriate data into them.
+	 */
+
+	retcfi = kmalloc(sizeof(struct cfi_private) + cfi.numchips * sizeof(struct flchip), GFP_KERNEL);
+
+	if (!retcfi) {
+		printk(KERN_WARNING "%s: kmalloc failed for CFI private structure\n", map->name);
+		kfree(cfi.cfiq);
+		kfree(chip_map);
+		return NULL;
+	}
+
+	memcpy(retcfi, &cfi, sizeof(cfi));
+	memset(&retcfi->chips[0], 0, sizeof(struct flchip) * cfi.numchips);
+
+	for (i = 0, j = 0; (j < cfi.numchips) && (i < max_chips); i++) {
+		if(test_bit(i, chip_map)) {
+			struct flchip *pchip = &retcfi->chips[j++];
+
+			pchip->start = (i << cfi.chipshift);
+			pchip->state = FL_READY;
+			init_waitqueue_head(&pchip->wq);
+			spin_lock_init(&pchip->_spinlock);
+			pchip->mutex = &pchip->_spinlock;
+		}
+	}
+
+	kfree(chip_map);
+	return retcfi;
+}
+
+	
+static int genprobe_new_chip(struct map_info *map, struct chip_probe *cp,
+			     struct cfi_private *cfi)
+{
+	int min_chips = (map_bankwidth(map)/4?:1); /* At most 4-bytes wide. */
+	int max_chips = map_bankwidth(map); /* And minimum 1 */
+	int nr_chips, type;
+
+	for (nr_chips = min_chips; nr_chips <= max_chips; nr_chips <<= 1) {
+
+		if (!cfi_interleave_supported(nr_chips))
+		    continue;
+
+		cfi->interleave = nr_chips;
+
+		/* Minimum device size. Don't look for one 8-bit device
+		   in a 16-bit bus, etc. */
+		type = map_bankwidth(map) / nr_chips;
+
+		for (; type <= CFI_DEVICETYPE_X32; type<<=1) {
+			cfi->device_type = type;
+
+			if (cp->probe_chip(map, 0, NULL, cfi))
+				return 1;
+		}
+	}
+	return 0;
+}
+
+typedef struct mtd_info *cfi_cmdset_fn_t(struct map_info *, int);
+
+extern cfi_cmdset_fn_t cfi_cmdset_0001;
+extern cfi_cmdset_fn_t cfi_cmdset_0002;
+extern cfi_cmdset_fn_t cfi_cmdset_0020;
+
+static inline struct mtd_info *cfi_cmdset_unknown(struct map_info *map, 
+						  int primary)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	__u16 type = primary?cfi->cfiq->P_ID:cfi->cfiq->A_ID;
+#if defined(CONFIG_MODULES) && defined(HAVE_INTER_MODULE)
+	char probename[32];
+	cfi_cmdset_fn_t *probe_function;
+
+	sprintf(probename, "cfi_cmdset_%4.4X", type);
+		
+	probe_function = inter_module_get_request(probename, probename);
+
+	if (probe_function) {
+		struct mtd_info *mtd;
+
+		mtd = (*probe_function)(map, primary);
+		/* If it was happy, it'll have increased its own use count */
+		inter_module_put(probename);
+		return mtd;
+	}
+#endif
+	printk(KERN_NOTICE "Support for command set %04X not present\n",
+	       type);
+
+	return NULL;
+}
+
+static struct mtd_info *check_cmd_set(struct map_info *map, int primary)
+{
+	struct cfi_private *cfi = map->fldrv_priv;
+	__u16 type = primary?cfi->cfiq->P_ID:cfi->cfiq->A_ID;
+	
+	if (type == P_ID_NONE || type == P_ID_RESERVED)
+		return NULL;
+
+	switch(type){
+		/* Urgh. Ifdefs. The version with weak symbols was
+		 * _much_ nicer. Shame it didn't seem to work on
+		 * anything but x86, really.
+		 * But we can't rely in inter_module_get() because
+		 * that'd mean we depend on link order.
+		 */
+#ifdef CONFIG_MTD_CFI_INTELEXT
+	case 0x0001:
+	case 0x0003:
+		return cfi_cmdset_0001(map, primary);
+#endif
+#ifdef CONFIG_MTD_CFI_AMDSTD
+	case 0x0002:
+		return cfi_cmdset_0002(map, primary);
+#endif
+#ifdef CONFIG_MTD_CFI_STAA
+        case 0x0020:
+		return cfi_cmdset_0020(map, primary);
+#endif
+	}
+
+	return cfi_cmdset_unknown(map, primary);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("Helper routines for flash chip probe code");
diff --git a/drivers/mtd/chips/jedec.c b/drivers/mtd/chips/jedec.c
new file mode 100644
index 000000000000..62d235a9a4e2
--- /dev/null
+++ b/drivers/mtd/chips/jedec.c
@@ -0,0 +1,934 @@
+
+/* JEDEC Flash Interface.
+ * This is an older type of interface for self programming flash. It is 
+ * commonly use in older AMD chips and is obsolete compared with CFI.
+ * It is called JEDEC because the JEDEC association distributes the ID codes
+ * for the chips.
+ *
+ * See the AMD flash databook for information on how to operate the interface.
+ *
+ * This code does not support anything wider than 8 bit flash chips, I am
+ * not going to guess how to send commands to them, plus I expect they will
+ * all speak CFI..
+ *
+ * $Id: jedec.c,v 1.22 2005/01/05 18:05:11 dwmw2 Exp $
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mtd/jedec.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/compatmac.h>
+
+static struct mtd_info *jedec_probe(struct map_info *);
+static int jedec_probe8(struct map_info *map,unsigned long base,
+		  struct jedec_private *priv);
+static int jedec_probe16(struct map_info *map,unsigned long base,
+		  struct jedec_private *priv);
+static int jedec_probe32(struct map_info *map,unsigned long base,
+		  struct jedec_private *priv);
+static void jedec_flash_chip_scan(struct jedec_private *priv,unsigned long start,
+			    unsigned long len);
+static int flash_erase(struct mtd_info *mtd, struct erase_info *instr);
+static int flash_write(struct mtd_info *mtd, loff_t start, size_t len,
+		       size_t *retlen, const u_char *buf);
+
+static unsigned long my_bank_size;
+
+/* Listing of parts and sizes. We need this table to learn the sector
+   size of the chip and the total length */
+static const struct JEDECTable JEDEC_table[] = {
+	{
+		.jedec		= 0x013D,
+		.name		= "AMD Am29F017D",
+		.size		= 2*1024*1024,
+		.sectorsize	= 64*1024,
+		.capabilities	= MTD_CAP_NORFLASH
+	},
+	{
+		.jedec		= 0x01AD,
+		.name		= "AMD Am29F016",
+		.size		= 2*1024*1024,
+		.sectorsize	= 64*1024,
+		.capabilities	= MTD_CAP_NORFLASH
+	},
+	{
+		.jedec		= 0x01D5,
+		.name		= "AMD Am29F080",
+		.size		= 1*1024*1024,
+		.sectorsize	= 64*1024,
+		.capabilities	= MTD_CAP_NORFLASH
+	},
+	{
+		.jedec		= 0x01A4,
+		.name		= "AMD Am29F040",
+		.size		= 512*1024,
+		.sectorsize	= 64*1024,
+		.capabilities	= MTD_CAP_NORFLASH
+	},
+	{
+		.jedec		= 0x20E3,
+		.name		= "AMD Am29W040B",
+		.size		= 512*1024,
+		.sectorsize	= 64*1024,
+		.capabilities	= MTD_CAP_NORFLASH
+	},
+	{
+		.jedec		= 0xC2AD,
+		.name		= "Macronix MX29F016",
+		.size		= 2*1024*1024,
+		.sectorsize	= 64*1024,
+		.capabilities	= MTD_CAP_NORFLASH
+	},
+	{ .jedec = 0x0 }
+};
+
+static const struct JEDECTable *jedec_idtoinf(__u8 mfr,__u8 id);
+static void jedec_sync(struct mtd_info *mtd) {};
+static int jedec_read(struct mtd_info *mtd, loff_t from, size_t len, 
+		      size_t *retlen, u_char *buf);
+static int jedec_read_banked(struct mtd_info *mtd, loff_t from, size_t len, 
+			     size_t *retlen, u_char *buf);
+
+static struct mtd_info *jedec_probe(struct map_info *map);
+
+
+
+static struct mtd_chip_driver jedec_chipdrv = {
+	.probe	= jedec_probe,
+	.name	= "jedec",
+	.module	= THIS_MODULE
+};
+
+/* Probe entry point */
+
+static struct mtd_info *jedec_probe(struct map_info *map)
+{
+   struct mtd_info *MTD;
+   struct jedec_private *priv;
+   unsigned long Base;
+   unsigned long SectorSize;
+   unsigned count;
+   unsigned I,Uniq;
+   char Part[200];
+   memset(&priv,0,sizeof(priv));
+
+   MTD = kmalloc(sizeof(struct mtd_info) + sizeof(struct jedec_private), GFP_KERNEL);
+   if (!MTD)
+	   return NULL;
+
+   memset(MTD, 0, sizeof(struct mtd_info) + sizeof(struct jedec_private));
+   priv = (struct jedec_private *)&MTD[1];
+   
+   my_bank_size = map->size;
+
+   if (map->size/my_bank_size > MAX_JEDEC_CHIPS)
+   {
+      printk("mtd: Increase MAX_JEDEC_CHIPS, too many banks.\n");
+      kfree(MTD);
+      return NULL;
+   }
+   
+   for (Base = 0; Base < map->size; Base += my_bank_size)
+   {
+      // Perhaps zero could designate all tests?
+      if (map->buswidth == 0)
+	 map->buswidth = 1;
+      
+      if (map->buswidth == 1){
+	 if (jedec_probe8(map,Base,priv) == 0) {
+		 printk("did recognize jedec chip\n");
+		 kfree(MTD);
+	         return NULL;
+	 }
+      }
+      if (map->buswidth == 2)
+	 jedec_probe16(map,Base,priv);
+      if (map->buswidth == 4)
+	 jedec_probe32(map,Base,priv);
+   }
+   
+   // Get the biggest sector size
+   SectorSize = 0;
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+   {
+	   //	   printk("priv->chips[%d].jedec is %x\n",I,priv->chips[I].jedec);
+	   //	   printk("priv->chips[%d].sectorsize is %lx\n",I,priv->chips[I].sectorsize);
+      if (priv->chips[I].sectorsize > SectorSize)
+	 SectorSize = priv->chips[I].sectorsize;
+   }
+   
+   // Quickly ensure that the other sector sizes are factors of the largest
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+   {
+      if ((SectorSize/priv->chips[I].sectorsize)*priv->chips[I].sectorsize != SectorSize)
+      {
+	 printk("mtd: Failed. Device has incompatible mixed sector sizes\n");
+	 kfree(MTD);
+	 return NULL;
+      }      
+   }
+   
+   /* Generate a part name that includes the number of different chips and
+      other configuration information */
+   count = 1;
+   strlcpy(Part,map->name,sizeof(Part)-10);
+   strcat(Part," ");
+   Uniq = 0;
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+   {
+      const struct JEDECTable *JEDEC;
+      
+      if (priv->chips[I+1].jedec == priv->chips[I].jedec)
+      {
+	 count++;
+	 continue;
+      }
+      
+      // Locate the chip in the jedec table
+      JEDEC = jedec_idtoinf(priv->chips[I].jedec >> 8,priv->chips[I].jedec);
+      if (JEDEC == 0)
+      {
+	 printk("mtd: Internal Error, JEDEC not set\n");
+	 kfree(MTD);
+	 return NULL;
+      }
+      
+      if (Uniq != 0)
+	 strcat(Part,",");
+      Uniq++;
+      
+      if (count != 1)
+	 sprintf(Part+strlen(Part),"%x*[%s]",count,JEDEC->name);
+      else
+	 sprintf(Part+strlen(Part),"%s",JEDEC->name);
+      if (strlen(Part) > sizeof(Part)*2/3)
+	 break;
+      count = 1;
+   }   
+
+   /* Determine if the chips are organized in a linear fashion, or if there
+      are empty banks. Note, the last bank does not count here, only the
+      first banks are important. Holes on non-bank boundaries can not exist
+      due to the way the detection algorithm works. */
+   if (priv->size < my_bank_size)
+      my_bank_size = priv->size;
+   priv->is_banked = 0;
+   //printk("priv->size is %x, my_bank_size is %x\n",priv->size,my_bank_size);
+   //printk("priv->bank_fill[0] is %x\n",priv->bank_fill[0]);
+   if (!priv->size) {
+	   printk("priv->size is zero\n");
+	   kfree(MTD);
+	   return NULL;
+   }
+   if (priv->size/my_bank_size) {
+	   if (priv->size/my_bank_size == 1) {
+		   priv->size = my_bank_size;
+	   }
+	   else {
+		   for (I = 0; I != priv->size/my_bank_size - 1; I++)
+		   {
+		      if (priv->bank_fill[I] != my_bank_size)
+			 priv->is_banked = 1;
+		      
+		      /* This even could be eliminated, but new de-optimized read/write
+			 functions have to be written */
+		      printk("priv->bank_fill[%d] is %lx, priv->bank_fill[0] is %lx\n",I,priv->bank_fill[I],priv->bank_fill[0]);
+		      if (priv->bank_fill[I] != priv->bank_fill[0])
+		      {
+			 printk("mtd: Failed. Cannot handle unsymmetric banking\n");
+			 kfree(MTD);
+			 return NULL;
+		      }      
+		   }
+	   }
+   }
+   if (priv->is_banked == 1)
+      strcat(Part,", banked");
+
+   //   printk("Part: '%s'\n",Part);
+   
+   memset(MTD,0,sizeof(*MTD));
+  // strlcpy(MTD->name,Part,sizeof(MTD->name));
+   MTD->name = map->name;
+   MTD->type = MTD_NORFLASH;
+   MTD->flags = MTD_CAP_NORFLASH;
+   MTD->erasesize = SectorSize*(map->buswidth);
+   //   printk("MTD->erasesize is %x\n",(unsigned int)MTD->erasesize);
+   MTD->size = priv->size;
+   //   printk("MTD->size is %x\n",(unsigned int)MTD->size);
+   //MTD->module = THIS_MODULE; // ? Maybe this should be the low level module?
+   MTD->erase = flash_erase;
+   if (priv->is_banked == 1)
+      MTD->read = jedec_read_banked;
+   else
+      MTD->read = jedec_read;
+   MTD->write = flash_write;
+   MTD->sync = jedec_sync;
+   MTD->priv = map;
+   map->fldrv_priv = priv;
+   map->fldrv = &jedec_chipdrv;
+   __module_get(THIS_MODULE);
+   return MTD;
+}
+
+/* Helper for the JEDEC function, JEDEC numbers all have odd parity */
+static int checkparity(u_char C)
+{
+   u_char parity = 0;
+   while (C != 0)
+   {
+      parity ^= C & 1;
+      C >>= 1;
+   }
+
+   return parity == 1;
+}
+
+
+/* Take an array of JEDEC numbers that represent interleved flash chips
+   and process them. Check to make sure they are good JEDEC numbers, look
+   them up and then add them to the chip list */   
+static int handle_jedecs(struct map_info *map,__u8 *Mfg,__u8 *Id,unsigned Count,
+		  unsigned long base,struct jedec_private *priv)
+{
+   unsigned I,J;
+   unsigned long Size;
+   unsigned long SectorSize;
+   const struct JEDECTable *JEDEC;
+
+   // Test #2 JEDEC numbers exhibit odd parity
+   for (I = 0; I != Count; I++)
+   {
+      if (checkparity(Mfg[I]) == 0 || checkparity(Id[I]) == 0)
+	 return 0;
+   }
+   
+   // Finally, just make sure all the chip sizes are the same
+   JEDEC = jedec_idtoinf(Mfg[0],Id[0]);
+   
+   if (JEDEC == 0)
+   {
+      printk("mtd: Found JEDEC flash chip, but do not have a table entry for %x:%x\n",Mfg[0],Mfg[1]);
+      return 0;
+   }
+   
+   Size = JEDEC->size;
+   SectorSize = JEDEC->sectorsize;
+   for (I = 0; I != Count; I++)
+   {
+      JEDEC = jedec_idtoinf(Mfg[0],Id[0]);
+      if (JEDEC == 0)
+      {
+	 printk("mtd: Found JEDEC flash chip, but do not have a table entry for %x:%x\n",Mfg[0],Mfg[1]);
+	 return 0;
+      }
+
+      if (Size != JEDEC->size || SectorSize != JEDEC->sectorsize)
+      {
+	 printk("mtd: Failed. Interleved flash does not have matching characteristics\n");
+	 return 0;
+      }      
+   }
+
+   // Load the Chips
+   for (I = 0; I != MAX_JEDEC_CHIPS; I++)
+   {
+      if (priv->chips[I].jedec == 0)
+	 break;
+   }
+
+   if (I + Count > MAX_JEDEC_CHIPS)
+   {
+      printk("mtd: Device has too many chips. Increase MAX_JEDEC_CHIPS\n");
+      return 0;
+   }      
+   
+   // Add them to the table
+   for (J = 0; J != Count; J++)
+   {
+      unsigned long Bank;
+	 
+      JEDEC = jedec_idtoinf(Mfg[J],Id[J]);
+      priv->chips[I].jedec = (Mfg[J] << 8) | Id[J];
+      priv->chips[I].size = JEDEC->size;
+      priv->chips[I].sectorsize = JEDEC->sectorsize;
+      priv->chips[I].base = base + J;
+      priv->chips[I].datashift = J*8;
+      priv->chips[I].capabilities = JEDEC->capabilities;
+      priv->chips[I].offset = priv->size + J;
+
+      // log2 n :|
+      priv->chips[I].addrshift = 0;
+      for (Bank = Count; Bank != 1; Bank >>= 1, priv->chips[I].addrshift++);
+      
+      // Determine how filled this bank is.
+      Bank = base & (~(my_bank_size-1));
+      if (priv->bank_fill[Bank/my_bank_size] < base + 
+	  (JEDEC->size << priv->chips[I].addrshift) - Bank)
+	 priv->bank_fill[Bank/my_bank_size] =  base + (JEDEC->size << priv->chips[I].addrshift) - Bank;
+      I++;
+   }
+
+   priv->size += priv->chips[I-1].size*Count;
+	 
+   return priv->chips[I-1].size;
+}
+
+/* Lookup the chip information from the JEDEC ID table. */
+static const struct JEDECTable *jedec_idtoinf(__u8 mfr,__u8 id)
+{
+   __u16 Id = (mfr << 8) | id;
+   unsigned long I = 0;
+   for (I = 0; JEDEC_table[I].jedec != 0; I++)
+      if (JEDEC_table[I].jedec == Id)
+	 return JEDEC_table + I;
+   return NULL;
+}
+
+// Look for flash using an 8 bit bus interface
+static int jedec_probe8(struct map_info *map,unsigned long base,
+		  struct jedec_private *priv)
+{ 
+   #define flread(x) map_read8(map,base+x)
+   #define flwrite(v,x) map_write8(map,v,base+x)
+
+   const unsigned long AutoSel1 = 0xAA;
+   const unsigned long AutoSel2 = 0x55;
+   const unsigned long AutoSel3 = 0x90;
+   const unsigned long Reset = 0xF0;
+   __u32 OldVal;
+   __u8 Mfg[1];
+   __u8 Id[1];
+   unsigned I;
+   unsigned long Size;
+
+   // Wait for any write/erase operation to settle
+   OldVal = flread(base);
+   for (I = 0; OldVal != flread(base) && I < 10000; I++)
+      OldVal = flread(base);
+   
+   // Reset the chip
+   flwrite(Reset,0x555); 
+   
+   // Send the sequence
+   flwrite(AutoSel1,0x555);
+   flwrite(AutoSel2,0x2AA);
+   flwrite(AutoSel3,0x555);
+   
+   //  Get the JEDEC numbers
+   Mfg[0] = flread(0);
+   Id[0] = flread(1);
+   //   printk("Mfg is %x, Id is %x\n",Mfg[0],Id[0]);
+      
+   Size = handle_jedecs(map,Mfg,Id,1,base,priv);
+   //   printk("handle_jedecs Size is %x\n",(unsigned int)Size);
+   if (Size == 0)
+   {
+      flwrite(Reset,0x555);
+      return 0;
+   }
+   
+
+   // Reset.
+   flwrite(Reset,0x555);
+   
+   return 1;
+   
+   #undef flread
+   #undef flwrite
+}
+
+// Look for flash using a 16 bit bus interface (ie 2 8-bit chips)
+static int jedec_probe16(struct map_info *map,unsigned long base,
+		  struct jedec_private *priv)
+{
+   return 0;
+}
+
+// Look for flash using a 32 bit bus interface (ie 4 8-bit chips)
+static int jedec_probe32(struct map_info *map,unsigned long base,
+		  struct jedec_private *priv)
+{
+   #define flread(x) map_read32(map,base+((x)<<2))
+   #define flwrite(v,x) map_write32(map,v,base+((x)<<2))
+
+   const unsigned long AutoSel1 = 0xAAAAAAAA;
+   const unsigned long AutoSel2 = 0x55555555;
+   const unsigned long AutoSel3 = 0x90909090;
+   const unsigned long Reset = 0xF0F0F0F0;
+   __u32 OldVal;
+   __u8 Mfg[4];
+   __u8 Id[4];
+   unsigned I;
+   unsigned long Size;
+
+   // Wait for any write/erase operation to settle
+   OldVal = flread(base);
+   for (I = 0; OldVal != flread(base) && I < 10000; I++)
+      OldVal = flread(base);
+   
+   // Reset the chip
+   flwrite(Reset,0x555); 
+   
+   // Send the sequence
+   flwrite(AutoSel1,0x555);
+   flwrite(AutoSel2,0x2AA);
+   flwrite(AutoSel3,0x555);
+   
+   // Test #1, JEDEC numbers are readable from 0x??00/0x??01
+   if (flread(0) != flread(0x100) || 
+       flread(1) != flread(0x101))
+   {
+      flwrite(Reset,0x555);
+      return 0;
+   }
+
+   // Split up the JEDEC numbers
+   OldVal = flread(0);
+   for (I = 0; I != 4; I++)
+      Mfg[I] = (OldVal >> (I*8));
+   OldVal = flread(1);
+   for (I = 0; I != 4; I++)
+      Id[I] = (OldVal >> (I*8));
+      
+   Size = handle_jedecs(map,Mfg,Id,4,base,priv);
+   if (Size == 0)
+   {
+      flwrite(Reset,0x555);
+      return 0;
+   }
+   
+   /* Check if there is address wrap around within a single bank, if this
+      returns JEDEC numbers then we assume that it is wrap around. Notice
+      we call this routine with the JEDEC return still enabled, if two or
+      more flashes have a truncated address space the probe test will still
+      work */
+   if (base + (Size<<2)+0x555 < map->size &&
+       base + (Size<<2)+0x555 < (base & (~(my_bank_size-1))) + my_bank_size)
+   {
+      if (flread(base+Size) != flread(base+Size + 0x100) ||
+	  flread(base+Size + 1) != flread(base+Size + 0x101))
+      {
+	 jedec_probe32(map,base+Size,priv);
+      }
+   }
+
+   // Reset.
+   flwrite(0xF0F0F0F0,0x555);
+   
+   return 1;
+   
+   #undef flread
+   #undef flwrite
+}
+
+/* Linear read. */
+static int jedec_read(struct mtd_info *mtd, loff_t from, size_t len, 
+		      size_t *retlen, u_char *buf)
+{
+   struct map_info *map = mtd->priv;
+   
+   map_copy_from(map, buf, from, len);
+   *retlen = len;
+   return 0;   
+}
+
+/* Banked read. Take special care to jump past the holes in the bank
+   mapping. This version assumes symetry in the holes.. */
+static int jedec_read_banked(struct mtd_info *mtd, loff_t from, size_t len, 
+			     size_t *retlen, u_char *buf)
+{
+   struct map_info *map = mtd->priv;
+   struct jedec_private *priv = map->fldrv_priv;
+
+   *retlen = 0;
+   while (len > 0)
+   {
+      // Determine what bank and offset into that bank the first byte is
+      unsigned long bank = from & (~(priv->bank_fill[0]-1));
+      unsigned long offset = from & (priv->bank_fill[0]-1);
+      unsigned long get = len;
+      if (priv->bank_fill[0] - offset < len)
+	 get = priv->bank_fill[0] - offset;
+
+      bank /= priv->bank_fill[0];      
+      map_copy_from(map,buf + *retlen,bank*my_bank_size + offset,get);
+      
+      len -= get;
+      *retlen += get;
+      from += get;
+   }   
+   return 0;   
+}
+
+/* Pass the flags value that the flash return before it re-entered read 
+   mode. */
+static void jedec_flash_failed(unsigned char code)
+{
+   /* Bit 5 being high indicates that there was an internal device
+      failure, erasure time limits exceeded or something */
+   if ((code & (1 << 5)) != 0)
+   {
+      printk("mtd: Internal Flash failure\n");
+      return;
+   }
+   printk("mtd: Programming didn't take\n");
+}
+
+/* This uses the erasure function described in the AMD Flash Handbook, 
+   it will work for flashes with a fixed sector size only. Flashes with
+   a selection of sector sizes (ie the AMD Am29F800B) will need a different
+   routine. This routine tries to parallize erasing multiple chips/sectors 
+   where possible */
+static int flash_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+   // Does IO to the currently selected chip
+   #define flread(x) map_read8(map,chip->base+((x)<<chip->addrshift))
+   #define flwrite(v,x) map_write8(map,v,chip->base+((x)<<chip->addrshift))
+   
+   unsigned long Time = 0;
+   unsigned long NoTime = 0;
+   unsigned long start = instr->addr, len = instr->len;
+   unsigned int I;
+   struct map_info *map = mtd->priv;
+   struct jedec_private *priv = map->fldrv_priv;
+
+   // Verify the arguments..
+   if (start + len > mtd->size ||
+       (start % mtd->erasesize) != 0 ||
+       (len % mtd->erasesize) != 0 ||
+       (len/mtd->erasesize) == 0)
+      return -EINVAL;
+   
+   jedec_flash_chip_scan(priv,start,len);
+
+   // Start the erase sequence on each chip
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+   {
+      unsigned long off;
+      struct jedec_flash_chip *chip = priv->chips + I;
+      
+      if (chip->length == 0)
+	 continue;
+      
+      if (chip->start + chip->length > chip->size)
+      {
+	 printk("DIE\n");
+	 return -EIO;
+      }     
+      
+      flwrite(0xF0,chip->start + 0x555);
+      flwrite(0xAA,chip->start + 0x555);
+      flwrite(0x55,chip->start + 0x2AA);
+      flwrite(0x80,chip->start + 0x555);
+      flwrite(0xAA,chip->start + 0x555);
+      flwrite(0x55,chip->start + 0x2AA);
+
+      /* Once we start selecting the erase sectors the delay between each 
+         command must not exceed 50us or it will immediately start erasing 
+         and ignore the other sectors */
+      for (off = 0; off < len; off += chip->sectorsize)
+      {
+	 // Check to make sure we didn't timeout
+	 flwrite(0x30,chip->start + off);
+	 if (off == 0)
+	    continue;
+	 if ((flread(chip->start + off) & (1 << 3)) != 0)
+	 {
+	    printk("mtd: Ack! We timed out the erase timer!\n");
+	    return -EIO;
+	 }       	 
+      }
+   }   
+
+   /* We could split this into a timer routine and return early, performing
+      background erasure.. Maybe later if the need warrents */
+
+   /* Poll the flash for erasure completion, specs say this can take as long
+      as 480 seconds to do all the sectors (for a 2 meg flash). 
+      Erasure time is dependent on chip age, temp and wear.. */
+   
+   /* This being a generic routine assumes a 32 bit bus. It does read32s
+      and bundles interleved chips into the same grouping. This will work 
+      for all bus widths */
+   Time = 0;
+   NoTime = 0;
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+   {
+      struct jedec_flash_chip *chip = priv->chips + I;
+      unsigned long off = 0;
+      unsigned todo[4] = {0,0,0,0};
+      unsigned todo_left = 0;
+      unsigned J;
+      
+      if (chip->length == 0)
+	 continue;
+
+      /* Find all chips in this data line, realistically this is all 
+         or nothing up to the interleve count */
+      for (J = 0; priv->chips[J].jedec != 0 && J < MAX_JEDEC_CHIPS; J++)
+      {
+	 if ((priv->chips[J].base & (~((1<<chip->addrshift)-1))) == 
+	     (chip->base & (~((1<<chip->addrshift)-1))))
+	 {
+	    todo_left++;
+	    todo[priv->chips[J].base & ((1<<chip->addrshift)-1)] = 1;
+	 }	 
+      }
+
+      /*      printk("todo: %x %x %x %x\n",(short)todo[0],(short)todo[1],
+	      (short)todo[2],(short)todo[3]);
+      */
+      while (1)
+      {
+	 __u32 Last[4];
+	 unsigned long Count = 0;
+	 
+	 /* During erase bit 7 is held low and bit 6 toggles, we watch this,
+	    should it stop toggling or go high then the erase is completed,
+  	    or this is not really flash ;> */
+	 switch (map->buswidth) {
+	 case 1:
+	    Last[0] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    Last[1] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    Last[2] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    break;
+	 case 2:
+	    Last[0] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    Last[1] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    Last[2] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    break;
+	 case 3:
+	    Last[0] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    Last[1] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    Last[2] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off);
+	    break;
+	 }
+	 Count = 3;
+	 while (todo_left != 0)
+	 {
+	    for (J = 0; J != 4; J++)
+	    {
+	       __u8 Byte1 = (Last[(Count-1)%4] >> (J*8)) & 0xFF;
+	       __u8 Byte2 = (Last[(Count-2)%4] >> (J*8)) & 0xFF;
+	       __u8 Byte3 = (Last[(Count-3)%4] >> (J*8)) & 0xFF;
+	       if (todo[J] == 0)
+		  continue;
+	       
+	       if ((Byte1 & (1 << 7)) == 0 && Byte1 != Byte2)
+	       {
+//		  printk("Check %x %x %x\n",(short)J,(short)Byte1,(short)Byte2);
+		  continue;
+	       }
+	       
+	       if (Byte1 == Byte2)
+	       {
+		  jedec_flash_failed(Byte3);
+		  return -EIO;
+	       }
+	       
+	       todo[J] = 0;
+	       todo_left--;
+	    }
+	    
+/*	    if (NoTime == 0)
+	       Time += HZ/10 - schedule_timeout(HZ/10);*/
+	    NoTime = 0;
+
+	    switch (map->buswidth) {
+	    case 1:
+	       Last[Count % 4] = map_read8(map,(chip->base >> chip->addrshift) + chip->start + off);
+	      break;
+	    case 2:
+	       Last[Count % 4] = map_read16(map,(chip->base >> chip->addrshift) + chip->start + off);
+	      break;
+	    case 4:
+	       Last[Count % 4] = map_read32(map,(chip->base >> chip->addrshift) + chip->start + off);
+	      break;
+	    }
+	    Count++;
+	    
+/*	    // Count time, max of 15s per sector (according to AMD)
+	    if (Time > 15*len/mtd->erasesize*HZ)
+	    {
+	       printk("mtd: Flash Erase Timed out\n");
+	       return -EIO;
+	    }	    */
+	 }
+	 	 
+	 // Skip to the next chip if we used chip erase
+	 if (chip->length == chip->size)
+	    off = chip->size;
+	 else
+	    off += chip->sectorsize;
+	 
+	 if (off >= chip->length)
+	    break;
+	 NoTime = 1;
+      }
+      
+      for (J = 0; priv->chips[J].jedec != 0 && J < MAX_JEDEC_CHIPS; J++)
+      {
+	 if ((priv->chips[J].base & (~((1<<chip->addrshift)-1))) ==
+	     (chip->base & (~((1<<chip->addrshift)-1))))
+	    priv->chips[J].length = 0;
+      }      
+   }
+       	    
+   //printk("done\n");
+   instr->state = MTD_ERASE_DONE;
+   mtd_erase_callback(instr);
+   return 0;
+   
+   #undef flread
+   #undef flwrite
+}
+
+/* This is the simple flash writing function. It writes to every byte, in
+   sequence. It takes care of how to properly address the flash if
+   the flash is interleved. It can only be used if all the chips in the 
+   array are identical!*/
+static int flash_write(struct mtd_info *mtd, loff_t start, size_t len,
+		       size_t *retlen, const u_char *buf)
+{
+   /* Does IO to the currently selected chip. It takes the bank addressing
+      base (which is divisible by the chip size) adds the necessary lower bits
+      of addrshift (interleave index) and then adds the control register index. */
+   #define flread(x) map_read8(map,base+(off&((1<<chip->addrshift)-1))+((x)<<chip->addrshift))
+   #define flwrite(v,x) map_write8(map,v,base+(off&((1<<chip->addrshift)-1))+((x)<<chip->addrshift))
+   
+   struct map_info *map = mtd->priv;
+   struct jedec_private *priv = map->fldrv_priv;
+   unsigned long base;
+   unsigned long off;
+   size_t save_len = len;
+   
+   if (start + len > mtd->size)
+      return -EIO;
+   
+   //printk("Here");
+   
+   //printk("flash_write: start is %x, len is %x\n",start,(unsigned long)len);
+   while (len != 0)
+   {
+      struct jedec_flash_chip *chip = priv->chips;
+      unsigned long bank;
+      unsigned long boffset;
+	 
+      // Compute the base of the flash.
+      off = ((unsigned long)start) % (chip->size << chip->addrshift);
+      base = start - off;
+
+      // Perform banked addressing translation.
+      bank = base & (~(priv->bank_fill[0]-1));
+      boffset = base & (priv->bank_fill[0]-1);
+      bank = (bank/priv->bank_fill[0])*my_bank_size;
+      base = bank + boffset;
+      
+    //  printk("Flasing %X %X %X\n",base,chip->size,len);
+     // printk("off is %x, compare with %x\n",off,chip->size << chip->addrshift);
+      
+      // Loop over this page
+      for (; off != (chip->size << chip->addrshift) && len != 0; start++, len--, off++,buf++)
+      {
+	 unsigned char oldbyte = map_read8(map,base+off);
+	 unsigned char Last[4];
+	 unsigned long Count = 0;
+
+	 if (oldbyte == *buf) {
+	//	 printk("oldbyte and *buf is %x,len is %x\n",oldbyte,len);
+	    continue;
+	 }
+	 if (((~oldbyte) & *buf) != 0)
+	    printk("mtd: warn: Trying to set a 0 to a 1\n");
+	     
+	 // Write
+	 flwrite(0xAA,0x555);
+	 flwrite(0x55,0x2AA);
+	 flwrite(0xA0,0x555);
+	 map_write8(map,*buf,base + off);
+	 Last[0] = map_read8(map,base + off);
+	 Last[1] = map_read8(map,base + off);
+	 Last[2] = map_read8(map,base + off);
+	 
+	 /* Wait for the flash to finish the operation. We store the last 4
+	    status bytes that have been retrieved so we can determine why
+	    it failed. The toggle bits keep toggling when there is a 
+	    failure */
+	 for (Count = 3; Last[(Count - 1) % 4] != Last[(Count - 2) % 4] &&
+	      Count < 10000; Count++)
+	    Last[Count % 4] = map_read8(map,base + off);
+	 if (Last[(Count - 1) % 4] != *buf)
+	 {
+	    jedec_flash_failed(Last[(Count - 3) % 4]);
+	    return -EIO;
+	 }	 
+      }
+   }
+   *retlen = save_len;
+   return 0;
+}
+
+/* This is used to enhance the speed of the erase routine,
+   when things are being done to multiple chips it is possible to
+   parallize the operations, particularly full memory erases of multi
+   chip memories benifit */
+static void jedec_flash_chip_scan(struct jedec_private *priv,unsigned long start,
+		     unsigned long len)
+{
+   unsigned int I;
+
+   // Zero the records
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+      priv->chips[I].start = priv->chips[I].length = 0;
+   
+   // Intersect the region with each chip
+   for (I = 0; priv->chips[I].jedec != 0 && I < MAX_JEDEC_CHIPS; I++)
+   {
+      struct jedec_flash_chip *chip = priv->chips + I;
+      unsigned long ByteStart;
+      unsigned long ChipEndByte = chip->offset + (chip->size << chip->addrshift);
+      
+      // End is before this chip or the start is after it
+      if (start+len < chip->offset ||
+	  ChipEndByte - (1 << chip->addrshift) < start)
+	 continue;
+      
+      if (start < chip->offset)
+      {
+	 ByteStart = chip->offset;
+	 chip->start = 0;
+      }      
+      else
+      {
+	 chip->start = (start - chip->offset + (1 << chip->addrshift)-1) >> chip->addrshift;
+	 ByteStart = start;
+      }
+
+      if (start + len >= ChipEndByte)
+	 chip->length = (ChipEndByte - ByteStart) >> chip->addrshift;
+      else
+	 chip->length = (start + len - ByteStart + (1 << chip->addrshift)-1) >> chip->addrshift;
+   }
+}
+
+int __init jedec_init(void)
+{
+	register_mtd_chip_driver(&jedec_chipdrv);
+	return 0;
+}
+
+static void __exit jedec_exit(void)
+{
+	unregister_mtd_chip_driver(&jedec_chipdrv);
+}
+
+module_init(jedec_init);
+module_exit(jedec_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jason Gunthorpe <jgg@deltatee.com> et al.");
+MODULE_DESCRIPTION("Old MTD chip driver for JEDEC-compliant flash chips");
diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c
new file mode 100644
index 000000000000..30325a25ab95
--- /dev/null
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -0,0 +1,2127 @@
+/* 
+   Common Flash Interface probe code.
+   (C) 2000 Red Hat. GPL'd.
+   $Id: jedec_probe.c,v 1.61 2004/11/19 20:52:16 thayne Exp $
+   See JEDEC (http://www.jedec.org/) standard JESD21C (section 3.5)
+   for the standard this probe goes back to.
+
+   Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com
+*/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/cfi.h>
+#include <linux/mtd/gen_probe.h>
+
+/* Manufacturers */
+#define MANUFACTURER_AMD	0x0001
+#define MANUFACTURER_ATMEL	0x001f
+#define MANUFACTURER_FUJITSU	0x0004
+#define MANUFACTURER_HYUNDAI	0x00AD
+#define MANUFACTURER_INTEL	0x0089
+#define MANUFACTURER_MACRONIX	0x00C2
+#define MANUFACTURER_NEC	0x0010
+#define MANUFACTURER_PMC	0x009D
+#define MANUFACTURER_SST	0x00BF
+#define MANUFACTURER_ST		0x0020
+#define MANUFACTURER_TOSHIBA	0x0098
+#define MANUFACTURER_WINBOND	0x00da
+
+
+/* AMD */
+#define AM29DL800BB	0x22C8
+#define AM29DL800BT	0x224A
+
+#define AM29F800BB	0x2258
+#define AM29F800BT	0x22D6
+#define AM29LV400BB	0x22BA
+#define AM29LV400BT	0x22B9
+#define AM29LV800BB	0x225B
+#define AM29LV800BT	0x22DA
+#define AM29LV160DT	0x22C4
+#define AM29LV160DB	0x2249
+#define AM29F017D	0x003D
+#define AM29F016D	0x00AD
+#define AM29F080	0x00D5
+#define AM29F040	0x00A4
+#define AM29LV040B	0x004F
+#define AM29F032B	0x0041
+#define AM29F002T	0x00B0
+
+/* Atmel */
+#define AT49BV512	0x0003
+#define AT29LV512	0x003d
+#define AT49BV16X	0x00C0
+#define AT49BV16XT	0x00C2
+#define AT49BV32X	0x00C8
+#define AT49BV32XT	0x00C9
+
+/* Fujitsu */
+#define MBM29F040C	0x00A4
+#define MBM29LV650UE	0x22D7
+#define MBM29LV320TE	0x22F6
+#define MBM29LV320BE	0x22F9
+#define MBM29LV160TE	0x22C4
+#define MBM29LV160BE	0x2249
+#define MBM29LV800BA	0x225B
+#define MBM29LV800TA	0x22DA
+#define MBM29LV400TC	0x22B9
+#define MBM29LV400BC	0x22BA
+
+/* Hyundai */
+#define HY29F002T	0x00B0
+
+/* Intel */
+#define I28F004B3T	0x00d4
+#define I28F004B3B	0x00d5
+#define I28F400B3T	0x8894
+#define I28F400B3B	0x8895
+#define I28F008S5	0x00a6
+#define I28F016S5	0x00a0
+#define I28F008SA	0x00a2
+#define I28F008B3T	0x00d2
+#define I28F008B3B	0x00d3
+#define I28F800B3T	0x8892
+#define I28F800B3B	0x8893
+#define I28F016S3	0x00aa
+#define I28F016B3T	0x00d0
+#define I28F016B3B	0x00d1
+#define I28F160B3T	0x8890
+#define I28F160B3B	0x8891
+#define I28F320B3T	0x8896
+#define I28F320B3B	0x8897
+#define I28F640B3T	0x8898
+#define I28F640B3B	0x8899
+#define I82802AB	0x00ad
+#define I82802AC	0x00ac
+
+/* Macronix */
+#define MX29LV040C	0x004F
+#define MX29LV160T	0x22C4
+#define MX29LV160B	0x2249
+#define MX29F016	0x00AD
+#define MX29F002T	0x00B0
+#define MX29F004T	0x0045
+#define MX29F004B	0x0046
+
+/* NEC */
+#define UPD29F064115	0x221C
+
+/* PMC */
+#define PM49FL002	0x006D
+#define PM49FL004	0x006E
+#define PM49FL008	0x006A
+
+/* ST - www.st.com */
+#define M29W800DT	0x00D7
+#define M29W800DB	0x005B
+#define M29W160DT	0x22C4
+#define M29W160DB	0x2249
+#define M29W040B	0x00E3
+#define M50FW040	0x002C
+#define M50FW080	0x002D
+#define M50FW016	0x002E
+#define M50LPW080       0x002F
+
+/* SST */
+#define SST29EE020	0x0010
+#define SST29LE020	0x0012
+#define SST29EE512	0x005d
+#define SST29LE512	0x003d
+#define SST39LF800	0x2781
+#define SST39LF160	0x2782
+#define SST39LF512	0x00D4
+#define SST39LF010	0x00D5
+#define SST39LF020	0x00D6
+#define SST39LF040	0x00D7
+#define SST39SF010A	0x00B5
+#define SST39SF020A	0x00B6
+#define SST49LF004B	0x0060
+#define SST49LF008A	0x005a
+#define SST49LF030A	0x001C
+#define SST49LF040A	0x0051
+#define SST49LF080A	0x005B
+
+/* Toshiba */
+#define TC58FVT160	0x00C2
+#define TC58FVB160	0x0043
+#define TC58FVT321	0x009A
+#define TC58FVB321	0x009C
+#define TC58FVT641	0x0093
+#define TC58FVB641	0x0095
+
+/* Winbond */
+#define W49V002A	0x00b0
+
+
+/*
+ * Unlock address sets for AMD command sets.
+ * Intel command sets use the MTD_UADDR_UNNECESSARY.
+ * Each identifier, except MTD_UADDR_UNNECESSARY, and
+ * MTD_UADDR_NO_SUPPORT must be defined below in unlock_addrs[].
+ * MTD_UADDR_NOT_SUPPORTED must be 0 so that structure
+ * initialization need not require initializing all of the
+ * unlock addresses for all bit widths.
+ */
+enum uaddr {
+	MTD_UADDR_NOT_SUPPORTED = 0,	/* data width not supported */
+	MTD_UADDR_0x0555_0x02AA,
+	MTD_UADDR_0x0555_0x0AAA,
+	MTD_UADDR_0x5555_0x2AAA,
+	MTD_UADDR_0x0AAA_0x0555,
+	MTD_UADDR_DONT_CARE,		/* Requires an arbitrary address */
+	MTD_UADDR_UNNECESSARY,		/* Does not require any address */
+};
+
+
+struct unlock_addr {
+	u32 addr1;
+	u32 addr2;
+};
+
+
+/*
+ * I don't like the fact that the first entry in unlock_addrs[]
+ * exists, but is for MTD_UADDR_NOT_SUPPORTED - and, therefore,
+ * should not be used.  The  problem is that structures with
+ * initializers have extra fields initialized to 0.  It is _very_
+ * desireable to have the unlock address entries for unsupported
+ * data widths automatically initialized - that means that
+ * MTD_UADDR_NOT_SUPPORTED must be 0 and the first entry here
+ * must go unused.
+ */
+static const struct unlock_addr  unlock_addrs[] = {
+	[MTD_UADDR_NOT_SUPPORTED] = {
+		.addr1 = 0xffff,
+		.addr2 = 0xffff
+	},
+
+	[MTD_UADDR_0x0555_0x02AA] = {
+		.addr1 = 0x0555,
+		.addr2 = 0x02aa
+	},
+
+	[MTD_UADDR_0x0555_0x0AAA] = {
+		.addr1 = 0x0555,
+		.addr2 = 0x0aaa
+	},
+
+	[MTD_UADDR_0x5555_0x2AAA] = {
+		.addr1 = 0x5555,
+		.addr2 = 0x2aaa
+	},
+
+	[MTD_UADDR_0x0AAA_0x0555] = {
+		.addr1 = 0x0AAA,
+		.addr2 = 0x0555
+	},
+
+	[MTD_UADDR_DONT_CARE] = {
+		.addr1 = 0x0000,      /* Doesn't matter which address */
+		.addr2 = 0x0000       /* is used - must be last entry */
+	},
+
+	[MTD_UADDR_UNNECESSARY] = {
+		.addr1 = 0x0000,
+		.addr2 = 0x0000
+	}
+};
+
+
+struct amd_flash_info {
+	const __u16 mfr_id;
+	const __u16 dev_id;
+	const char *name;
+	const int DevSize;
+	const int NumEraseRegions;
+	const int CmdSet;
+	const __u8 uaddr[4];		/* unlock addrs for 8, 16, 32, 64 */
+	const ulong regions[6];
+};
+
+#define ERASEINFO(size,blocks) (size<<8)|(blocks-1)
+
+#define SIZE_64KiB  16
+#define SIZE_128KiB 17
+#define SIZE_256KiB 18
+#define SIZE_512KiB 19
+#define SIZE_1MiB   20
+#define SIZE_2MiB   21
+#define SIZE_4MiB   22
+#define SIZE_8MiB   23
+
+
+/*
+ * Please keep this list ordered by manufacturer!
+ * Fortunately, the list isn't searched often and so a
+ * slow, linear search isn't so bad.
+ */
+static const struct amd_flash_info jedec_table[] = {
+	{
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F032B,
+		.name		= "AMD AM29F032B",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,64)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV160DT,
+		.name		= "AMD AM29LV160DT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA   /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,31),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV160DB,
+		.name		= "AMD AM29LV160DB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA   /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,31)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV400BB,
+		.name		= "AMD AM29LV400BB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,7)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV400BT,
+		.name		= "AMD AM29LV400BT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,7),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV800BB,
+		.name		= "AMD AM29LV800BB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,15),
+		}
+	}, {
+/* add DL */
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29DL800BB,
+		.name		= "AMD AM29DL800BB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 6,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,4),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x10000,14)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29DL800BT,
+		.name		= "AMD AM29DL800BT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 6,
+		.regions	= {
+			ERASEINFO(0x10000,14),
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,4),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F800BB,
+		.name		= "AMD AM29F800BB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,15),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV800BT,
+		.name		= "AMD AM29LV800BT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,15),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F800BT,
+		.name		= "AMD AM29F800BT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,15),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F017D,
+		.name		= "AMD AM29F017D",
+		.uaddr		= {
+			[0] = MTD_UADDR_DONT_CARE     /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,32),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F016D,
+		.name		= "AMD AM29F016D",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,32),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F080,
+		.name		= "AMD AM29F080",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,16),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F040,
+		.name		= "AMD AM29F040",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29LV040B,
+		.name		= "AMD AM29LV040B",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_AMD,
+		.dev_id		= AM29F002T,
+		.name		= "AMD AM29F002T",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,3),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ATMEL,
+		.dev_id		= AT49BV512,
+		.name		= "Atmel AT49BV512",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_64KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ATMEL,
+		.dev_id		= AT29LV512,
+		.name		= "Atmel AT29LV512",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_64KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x80,256),
+			ERASEINFO(0x80,256)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ATMEL,
+		.dev_id		= AT49BV16X,
+		.name		= "Atmel AT49BV16X",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x0AAA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x0AAA   /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000,8),
+			ERASEINFO(0x10000,31)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ATMEL,
+		.dev_id		= AT49BV16XT,
+		.name		= "Atmel AT49BV16XT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x0AAA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x0AAA   /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000,31),
+			ERASEINFO(0x02000,8)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ATMEL,
+		.dev_id		= AT49BV32X,
+		.name		= "Atmel AT49BV32X",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x0AAA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x0AAA   /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000,8),
+			ERASEINFO(0x10000,63)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ATMEL,
+		.dev_id		= AT49BV32XT,
+		.name		= "Atmel AT49BV32XT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x0AAA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x0AAA   /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000,63),
+			ERASEINFO(0x02000,8)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29F040C,
+		.name		= "Fujitsu MBM29F040C",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV650UE,
+		.name		= "Fujitsu MBM29LV650UE",
+		.uaddr		= {
+			[0] = MTD_UADDR_DONT_CARE     /* x16 */
+		},
+		.DevSize	= SIZE_8MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,128)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV320TE,
+		.name		= "Fujitsu MBM29LV320TE",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000,63),
+			ERASEINFO(0x02000,8)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV320BE,
+		.name		= "Fujitsu MBM29LV320BE",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000,8),
+			ERASEINFO(0x10000,63)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV160TE,
+		.name		= "Fujitsu MBM29LV160TE",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,31),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV160BE,
+		.name		= "Fujitsu MBM29LV160BE",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,31)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV800BA,
+		.name		= "Fujitsu MBM29LV800BA",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,15)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV800TA,
+		.name		= "Fujitsu MBM29LV800TA",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,15),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV400BC,
+		.name		= "Fujitsu MBM29LV400BC",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,7)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_FUJITSU,
+		.dev_id		= MBM29LV400TC,
+		.name		= "Fujitsu MBM29LV400TC",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,7),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_HYUNDAI,
+		.dev_id		= HY29F002T,
+		.name		= "Hyundai HY29F002T",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,3),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F004B3B,
+		.name		= "Intel 28F004B3B",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 7),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F004B3T,
+		.name		= "Intel 28F004B3T",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 7),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F400B3B,
+		.name		= "Intel 28F400B3B",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 7),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F400B3T,
+		.name		= "Intel 28F400B3T",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 7),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F008B3B,
+		.name		= "Intel 28F008B3B",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 15),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F008B3T,
+		.name		= "Intel 28F008B3T",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 15),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F008S5,
+		.name		= "Intel 28F008S5",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,16),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F016S5,
+		.name		= "Intel 28F016S5",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,32),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F008SA,
+		.name		= "Intel 28F008SA",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000, 16),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F800B3B,
+		.name		= "Intel 28F800B3B",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 15),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F800B3T,
+		.name		= "Intel 28F800B3T",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 15),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F016B3B,
+		.name		= "Intel 28F016B3B",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 31),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F016S3,
+		.name		= "Intel I28F016S3",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000, 32),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F016B3T,
+		.name		= "Intel 28F016B3T",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 31),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F160B3B,
+		.name		= "Intel 28F160B3B",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 31),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F160B3T,
+		.name		= "Intel 28F160B3T",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 31),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F320B3B,
+		.name		= "Intel 28F320B3B",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 63),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F320B3T,
+		.name		= "Intel 28F320B3T",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 63),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F640B3B,
+		.name		= "Intel 28F640B3B",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_8MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000, 8),
+			ERASEINFO(0x10000, 127),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I28F640B3T,
+		.name		= "Intel 28F640B3T",
+		.uaddr		= {
+			[1] = MTD_UADDR_UNNECESSARY,    /* x16 */
+		},
+		.DevSize	= SIZE_8MiB,
+		.CmdSet		= P_ID_INTEL_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000, 127),
+			ERASEINFO(0x02000, 8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I82802AB,
+		.name		= "Intel 82802AB",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_INTEL,
+		.dev_id		= I82802AC,
+		.name		= "Intel 82802AC",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,16),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29LV040C,
+		.name		= "Macronix MX29LV040C",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA,  /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29LV160T,
+		.name		= "MXIC MX29LV160T",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,31),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_NEC,
+		.dev_id		= UPD29F064115,
+		.name		= "NEC uPD29F064115",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_8MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 3,
+		.regions	= {
+			ERASEINFO(0x2000,8),
+			ERASEINFO(0x10000,126),
+			ERASEINFO(0x2000,8),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29LV160B,
+		.name		= "MXIC MX29LV160B",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,31)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29F016,
+		.name		= "Macronix MX29F016",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,32),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29F004T,
+		.name		= "Macronix MX29F004T",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,7),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29F004B,
+		.name		= "Macronix MX29F004B",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,7),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_MACRONIX,
+		.dev_id		= MX29F002T,
+		.name		= "Macronix MX29F002T",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,3),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_PMC,
+		.dev_id		= PM49FL002,
+		.name		= "PMC Pm49FL002",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO( 0x01000, 64 )
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_PMC,
+		.dev_id		= PM49FL004,
+		.name		= "PMC Pm49FL004",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO( 0x01000, 128 )
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_PMC,
+		.dev_id		= PM49FL008,
+		.name		= "PMC Pm49FL008",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO( 0x01000, 256 )
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39LF512,
+		.name		= "SST 39LF512",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_64KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,16),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39LF010,
+		.name		= "SST 39LF010",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_128KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,32),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_SST,
+ 		.dev_id 	= SST29EE020,
+		.name		= "SST 29EE020",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+ 		.DevSize	= SIZE_256KiB,
+ 		.CmdSet		= P_ID_SST_PAGE,
+ 		.NumEraseRegions= 1,
+ 		.regions = {ERASEINFO(0x01000,64),
+ 		}
+         }, {
+ 		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST29LE020,
+ 		.name		= "SST 29LE020",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+ 		.DevSize	= SIZE_256KiB,
+ 		.CmdSet		= P_ID_SST_PAGE,
+ 		.NumEraseRegions= 1,
+ 		.regions = {ERASEINFO(0x01000,64),
+ 		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39LF020,
+		.name		= "SST 39LF020",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,64),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39LF040,
+		.name		= "SST 39LF040",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,128),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39SF010A,
+		.name		= "SST 39SF010A",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_128KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,32),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39SF020A,
+		.name		= "SST 39SF020A",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,64),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST49LF004B,
+		.name		= "SST 49LF004B",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,128),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST49LF008A,
+		.name		= "SST 49LF008A",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,256),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST49LF030A,
+		.name		= "SST 49LF030A",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,96),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST49LF040A,
+		.name		= "SST 49LF040A",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,128),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST49LF080A,
+		.name		= "SST 49LF080A",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x01000,256),
+		}
+	}, {
+               .mfr_id         = MANUFACTURER_SST,     /* should be CFI */
+               .dev_id         = SST39LF160,
+               .name           = "SST 39LF160",
+               .uaddr          = {
+                       [0] = MTD_UADDR_0x5555_0x2AAA,  /* x8 */
+                       [1] = MTD_UADDR_0x5555_0x2AAA   /* x16 */
+               },
+               .DevSize        = SIZE_2MiB,
+               .CmdSet         = P_ID_AMD_STD,
+               .NumEraseRegions= 2,
+               .regions        = {
+                       ERASEINFO(0x1000,256),
+                       ERASEINFO(0x1000,256)
+               }
+
+       }, {
+		.mfr_id		= MANUFACTURER_ST,	/* FIXME - CFI device? */
+		.dev_id		= M29W800DT,
+		.name		= "ST M29W800DT",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA,  /* x8 */
+			[1] = MTD_UADDR_0x5555_0x2AAA   /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,15),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ST,	/* FIXME - CFI device? */
+		.dev_id		= M29W800DB,
+		.name		= "ST M29W800DB",
+ 		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA,  /* x8 */
+			[1] = MTD_UADDR_0x5555_0x2AAA   /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,15)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ST,	/* FIXME - CFI device? */
+		.dev_id		= M29W160DT,
+		.name		= "ST M29W160DT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,31),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ST,	/* FIXME - CFI device? */
+		.dev_id		= M29W160DB,
+		.name		= "ST M29W160DB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,31)
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_ST,
+		.dev_id		= M29W040B,
+		.name		= "ST M29W040B",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_ST,
+		.dev_id		= M50FW040,
+		.name		= "ST M50FW040",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_512KiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,8),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_ST,
+		.dev_id		= M50FW080,
+		.name		= "ST M50FW080",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,16),
+		}
+        }, {
+		.mfr_id		= MANUFACTURER_ST,
+		.dev_id		= M50FW016,
+		.name		= "ST M50FW016",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,32),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_ST,
+		.dev_id		= M50LPW080,
+		.name		= "ST M50LPW080",
+		.uaddr		= {
+			[0] = MTD_UADDR_UNNECESSARY,    /* x8 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_INTEL_EXT,
+		.NumEraseRegions= 1,
+		.regions	= {
+			ERASEINFO(0x10000,16),
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_TOSHIBA,
+		.dev_id		= TC58FVT160,
+		.name		= "Toshiba TC58FVT160",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000,31),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x04000,1)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_TOSHIBA,
+		.dev_id		= TC58FVB160,
+		.name		= "Toshiba TC58FVB160",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA  /* x16 */
+		},
+		.DevSize	= SIZE_2MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000,1),
+			ERASEINFO(0x02000,2),
+			ERASEINFO(0x08000,1),
+			ERASEINFO(0x10000,31)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_TOSHIBA,
+		.dev_id		= TC58FVB321,
+		.name		= "Toshiba TC58FVB321",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA  /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000,8),
+			ERASEINFO(0x10000,63)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_TOSHIBA,
+		.dev_id		= TC58FVT321,
+		.name		= "Toshiba TC58FVT321",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA  /* x16 */
+		},
+		.DevSize	= SIZE_4MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000,63),
+			ERASEINFO(0x02000,8)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_TOSHIBA,
+		.dev_id		= TC58FVB641,
+		.name		= "Toshiba TC58FVB641",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA, /* x16 */
+		},
+		.DevSize	= SIZE_8MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x02000,8),
+			ERASEINFO(0x10000,127)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_TOSHIBA,
+		.dev_id		= TC58FVT641,
+		.name		= "Toshiba TC58FVT641",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA, /* x16 */
+		},
+		.DevSize	= SIZE_8MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 2,
+		.regions	= {
+			ERASEINFO(0x10000,127),
+			ERASEINFO(0x02000,8)
+		}
+	}, {
+		.mfr_id		= MANUFACTURER_WINBOND,
+		.dev_id		= W49V002A,
+		.name		= "Winbond W49V002A",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
+		},
+		.DevSize	= SIZE_256KiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000, 3),
+			ERASEINFO(0x08000, 1),
+			ERASEINFO(0x02000, 2),
+			ERASEINFO(0x04000, 1),
+		}
+	}
+};
+
+
+static int cfi_jedec_setup(struct cfi_private *p_cfi, int index);
+
+static int jedec_probe_chip(struct map_info *map, __u32 base,
+			    unsigned long *chip_map, struct cfi_private *cfi);
+
+static struct mtd_info *jedec_probe(struct map_info *map);
+
+static inline u32 jedec_read_mfr(struct map_info *map, __u32 base, 
+	struct cfi_private *cfi)
+{
+	map_word result;
+	unsigned long mask;
+	u32 ofs = cfi_build_cmd_addr(0, cfi_interleave(cfi), cfi->device_type);
+	mask = (1 << (cfi->device_type * 8)) -1;
+	result = map_read(map, base + ofs);
+	return result.x[0] & mask;
+}
+
+static inline u32 jedec_read_id(struct map_info *map, __u32 base, 
+	struct cfi_private *cfi)
+{
+	map_word result;
+	unsigned long mask;
+	u32 ofs = cfi_build_cmd_addr(1, cfi_interleave(cfi), cfi->device_type);
+	mask = (1 << (cfi->device_type * 8)) -1;
+	result = map_read(map, base + ofs);
+	return result.x[0] & mask;
+}
+
+static inline void jedec_reset(u32 base, struct map_info *map, 
+	struct cfi_private *cfi)
+{
+	/* Reset */
+
+	/* after checking the datasheets for SST, MACRONIX and ATMEL
+	 * (oh and incidentaly the jedec spec - 3.5.3.3) the reset
+	 * sequence is *supposed* to be 0xaa at 0x5555, 0x55 at
+	 * 0x2aaa, 0xF0 at 0x5555 this will not affect the AMD chips
+	 * as they will ignore the writes and dont care what address
+	 * the F0 is written to */
+	if(cfi->addr_unlock1) {
+		DEBUG( MTD_DEBUG_LEVEL3,
+		       "reset unlock called %x %x \n",
+		       cfi->addr_unlock1,cfi->addr_unlock2);
+		cfi_send_gen_cmd(0xaa, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+		cfi_send_gen_cmd(0x55, cfi->addr_unlock2, base, map, cfi, cfi->device_type, NULL);
+	}
+
+	cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+	/* Some misdesigned intel chips do not respond for 0xF0 for a reset,
+	 * so ensure we're in read mode.  Send both the Intel and the AMD command
+	 * for this.  Intel uses 0xff for this, AMD uses 0xff for NOP, so
+	 * this should be safe.
+	 */ 
+	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
+	/* FIXME - should have reset delay before continuing */
+}
+
+
+static inline __u8 finfo_uaddr(const struct amd_flash_info *finfo, int device_type)
+{
+	int uaddr_idx;
+	__u8 uaddr = MTD_UADDR_NOT_SUPPORTED;
+
+	switch ( device_type ) {
+	case CFI_DEVICETYPE_X8:  uaddr_idx = 0; break;
+	case CFI_DEVICETYPE_X16: uaddr_idx = 1; break;
+	case CFI_DEVICETYPE_X32: uaddr_idx = 2; break;
+	default:
+		printk(KERN_NOTICE "MTD: %s(): unknown device_type %d\n",
+		       __func__, device_type);
+		goto uaddr_done;
+	}
+
+	uaddr = finfo->uaddr[uaddr_idx];
+
+	if (uaddr != MTD_UADDR_NOT_SUPPORTED ) {
+		/* ASSERT("The unlock addresses for non-8-bit mode
+		   are bollocks. We don't really need an array."); */
+		uaddr = finfo->uaddr[0];
+	}
+
+ uaddr_done:
+	return uaddr;
+}
+
+
+static int cfi_jedec_setup(struct cfi_private *p_cfi, int index)
+{
+	int i,num_erase_regions;
+	__u8 uaddr;
+
+	printk("Found: %s\n",jedec_table[index].name);
+
+	num_erase_regions = jedec_table[index].NumEraseRegions;
+	
+	p_cfi->cfiq = kmalloc(sizeof(struct cfi_ident) + num_erase_regions * 4, GFP_KERNEL);
+	if (!p_cfi->cfiq) {
+		//xx printk(KERN_WARNING "%s: kmalloc failed for CFI ident structure\n", map->name);
+		return 0;
+	}
+
+	memset(p_cfi->cfiq,0,sizeof(struct cfi_ident));	
+
+	p_cfi->cfiq->P_ID = jedec_table[index].CmdSet;
+	p_cfi->cfiq->NumEraseRegions = jedec_table[index].NumEraseRegions;
+	p_cfi->cfiq->DevSize = jedec_table[index].DevSize;
+	p_cfi->cfi_mode = CFI_MODE_JEDEC;
+
+	for (i=0; i<num_erase_regions; i++){
+		p_cfi->cfiq->EraseRegionInfo[i] = jedec_table[index].regions[i];
+	}
+	p_cfi->cmdset_priv = NULL;
+
+	/* This may be redundant for some cases, but it doesn't hurt */
+	p_cfi->mfr = jedec_table[index].mfr_id;
+	p_cfi->id = jedec_table[index].dev_id;
+
+	uaddr = finfo_uaddr(&jedec_table[index], p_cfi->device_type);
+	if ( uaddr == MTD_UADDR_NOT_SUPPORTED ) {
+		kfree( p_cfi->cfiq );
+		return 0;
+	}
+
+	p_cfi->addr_unlock1 = unlock_addrs[uaddr].addr1;
+	p_cfi->addr_unlock2 = unlock_addrs[uaddr].addr2;
+
+	return 1; 	/* ok */
+}
+
+
+/*
+ * There is a BIG problem properly ID'ing the JEDEC devic and guaranteeing
+ * the mapped address, unlock addresses, and proper chip ID.  This function
+ * attempts to minimize errors.  It is doubtfull that this probe will ever
+ * be perfect - consequently there should be some module parameters that
+ * could be manually specified to force the chip info.
+ */
+static inline int jedec_match( __u32 base,
+			       struct map_info *map,
+			       struct cfi_private *cfi,
+			       const struct amd_flash_info *finfo )
+{
+	int rc = 0;           /* failure until all tests pass */
+	u32 mfr, id;
+	__u8 uaddr;
+
+	/*
+	 * The IDs must match.  For X16 and X32 devices operating in
+	 * a lower width ( X8 or X16 ), the device ID's are usually just
+	 * the lower byte(s) of the larger device ID for wider mode.  If
+	 * a part is found that doesn't fit this assumption (device id for
+	 * smaller width mode is completely unrealated to full-width mode)
+	 * then the jedec_table[] will have to be augmented with the IDs
+	 * for different widths.
+	 */
+	switch (cfi->device_type) {
+	case CFI_DEVICETYPE_X8:
+		mfr = (__u8)finfo->mfr_id;
+		id = (__u8)finfo->dev_id;
+		break;
+	case CFI_DEVICETYPE_X16:
+		mfr = (__u16)finfo->mfr_id;
+		id = (__u16)finfo->dev_id;
+		break;
+	case CFI_DEVICETYPE_X32:
+		mfr = (__u16)finfo->mfr_id;
+		id = (__u32)finfo->dev_id;
+		break;
+	default:
+		printk(KERN_WARNING
+		       "MTD %s(): Unsupported device type %d\n",
+		       __func__, cfi->device_type);
+		goto match_done;
+	}
+	if ( cfi->mfr != mfr || cfi->id != id ) {
+		goto match_done;
+	}
+
+	/* the part size must fit in the memory window */
+	DEBUG( MTD_DEBUG_LEVEL3,
+	       "MTD %s(): Check fit 0x%.8x + 0x%.8x = 0x%.8x\n",
+	       __func__, base, 1 << finfo->DevSize, base + (1 << finfo->DevSize) );
+	if ( base + cfi_interleave(cfi) * ( 1 << finfo->DevSize ) > map->size ) {
+		DEBUG( MTD_DEBUG_LEVEL3,
+		       "MTD %s(): 0x%.4x 0x%.4x %dKiB doesn't fit\n",
+		       __func__, finfo->mfr_id, finfo->dev_id,
+		       1 << finfo->DevSize );
+		goto match_done;
+	}
+
+	uaddr = finfo_uaddr(finfo, cfi->device_type);
+	if ( uaddr == MTD_UADDR_NOT_SUPPORTED ) {
+		goto match_done;
+	}
+
+	DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): check unlock addrs 0x%.4x 0x%.4x\n",
+	       __func__, cfi->addr_unlock1, cfi->addr_unlock2 );
+	if ( MTD_UADDR_UNNECESSARY != uaddr && MTD_UADDR_DONT_CARE != uaddr
+	     && ( unlock_addrs[uaddr].addr1 != cfi->addr_unlock1 ||
+		  unlock_addrs[uaddr].addr2 != cfi->addr_unlock2 ) ) {
+		DEBUG( MTD_DEBUG_LEVEL3,
+			"MTD %s(): 0x%.4x 0x%.4x did not match\n",
+			__func__,
+			unlock_addrs[uaddr].addr1,
+			unlock_addrs[uaddr].addr2);
+		goto match_done;
+	}
+
+	/*
+	 * Make sure the ID's dissappear when the device is taken out of
+	 * ID mode.  The only time this should fail when it should succeed
+	 * is when the ID's are written as data to the same
+	 * addresses.  For this rare and unfortunate case the chip
+	 * cannot be probed correctly.
+	 * FIXME - write a driver that takes all of the chip info as
+	 * module parameters, doesn't probe but forces a load.
+	 */
+	DEBUG( MTD_DEBUG_LEVEL3,
+	       "MTD %s(): check ID's disappear when not in ID mode\n",
+	       __func__ );
+	jedec_reset( base, map, cfi );
+	mfr = jedec_read_mfr( map, base, cfi );
+	id = jedec_read_id( map, base, cfi );
+	if ( mfr == cfi->mfr && id == cfi->id ) {
+		DEBUG( MTD_DEBUG_LEVEL3,
+		       "MTD %s(): ID 0x%.2x:0x%.2x did not change after reset:\n"
+		       "You might need to manually specify JEDEC parameters.\n",
+			__func__, cfi->mfr, cfi->id );
+		goto match_done;
+	}
+
+	/* all tests passed - mark  as success */
+	rc = 1;
+
+	/*
+	 * Put the device back in ID mode - only need to do this if we
+	 * were truly frobbing a real device.
+	 */
+	DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): return to ID mode\n", __func__ );
+	if(cfi->addr_unlock1) {
+		cfi_send_gen_cmd(0xaa, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+		cfi_send_gen_cmd(0x55, cfi->addr_unlock2, base, map, cfi, cfi->device_type, NULL);
+	}
+	cfi_send_gen_cmd(0x90, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+	/* FIXME - should have a delay before continuing */
+
+ match_done:	
+	return rc;
+}
+
+
+static int jedec_probe_chip(struct map_info *map, __u32 base,
+			    unsigned long *chip_map, struct cfi_private *cfi)
+{
+	int i;
+	enum uaddr uaddr_idx = MTD_UADDR_NOT_SUPPORTED;
+	u32 probe_offset1, probe_offset2;
+
+ retry:
+	if (!cfi->numchips) {
+		uaddr_idx++;
+
+		if (MTD_UADDR_UNNECESSARY == uaddr_idx)
+			return 0;
+
+		cfi->addr_unlock1 = unlock_addrs[uaddr_idx].addr1;
+		cfi->addr_unlock2 = unlock_addrs[uaddr_idx].addr2;
+	}
+
+	/* Make certain we aren't probing past the end of map */
+	if (base >= map->size) {
+		printk(KERN_NOTICE
+			"Probe at base(0x%08x) past the end of the map(0x%08lx)\n",
+			base, map->size -1);
+		return 0;
+		
+	}
+	/* Ensure the unlock addresses we try stay inside the map */
+	probe_offset1 = cfi_build_cmd_addr(
+		cfi->addr_unlock1, 
+		cfi_interleave(cfi), 
+		cfi->device_type);
+	probe_offset2 = cfi_build_cmd_addr(
+		cfi->addr_unlock1, 
+		cfi_interleave(cfi), 
+		cfi->device_type);
+	if (	((base + probe_offset1 + map_bankwidth(map)) >= map->size) ||
+		((base + probe_offset2 + map_bankwidth(map)) >= map->size))
+	{
+		goto retry;
+	}
+		
+	/* Reset */
+	jedec_reset(base, map, cfi);
+
+	/* Autoselect Mode */
+	if(cfi->addr_unlock1) {
+		cfi_send_gen_cmd(0xaa, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+		cfi_send_gen_cmd(0x55, cfi->addr_unlock2, base, map, cfi, cfi->device_type, NULL);
+	}
+	cfi_send_gen_cmd(0x90, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+	/* FIXME - should have a delay before continuing */
+
+	if (!cfi->numchips) {
+		/* This is the first time we're called. Set up the CFI 
+		   stuff accordingly and return */
+		
+		cfi->mfr = jedec_read_mfr(map, base, cfi);
+		cfi->id = jedec_read_id(map, base, cfi);
+		DEBUG(MTD_DEBUG_LEVEL3,
+		      "Search for id:(%02x %02x) interleave(%d) type(%d)\n", 
+			cfi->mfr, cfi->id, cfi_interleave(cfi), cfi->device_type);
+		for (i=0; i<sizeof(jedec_table)/sizeof(jedec_table[0]); i++) {
+			if ( jedec_match( base, map, cfi, &jedec_table[i] ) ) {
+				DEBUG( MTD_DEBUG_LEVEL3,
+				       "MTD %s(): matched device 0x%x,0x%x unlock_addrs: 0x%.4x 0x%.4x\n",
+				       __func__, cfi->mfr, cfi->id,
+				       cfi->addr_unlock1, cfi->addr_unlock2 );
+				if (!cfi_jedec_setup(cfi, i))
+					return 0;
+				goto ok_out;
+			}
+		}
+		goto retry;
+	} else {
+		__u16 mfr;
+		__u16 id;
+
+		/* Make sure it is a chip of the same manufacturer and id */
+		mfr = jedec_read_mfr(map, base, cfi);
+		id = jedec_read_id(map, base, cfi);
+
+		if ((mfr != cfi->mfr) || (id != cfi->id)) {
+			printk(KERN_DEBUG "%s: Found different chip or no chip at all (mfr 0x%x, id 0x%x) at 0x%x\n",
+			       map->name, mfr, id, base);
+			jedec_reset(base, map, cfi);
+			return 0;
+		}
+	}
+	
+	/* Check each previous chip locations to see if it's an alias */
+	for (i=0; i < (base >> cfi->chipshift); i++) {
+		unsigned long start;
+		if(!test_bit(i, chip_map)) {
+			continue; /* Skip location; no valid chip at this address */
+		}
+		start = i << cfi->chipshift;
+		if (jedec_read_mfr(map, start, cfi) == cfi->mfr &&
+		    jedec_read_id(map, start, cfi) == cfi->id) {
+			/* Eep. This chip also looks like it's in autoselect mode.
+			   Is it an alias for the new one? */
+			jedec_reset(start, map, cfi);
+
+			/* If the device IDs go away, it's an alias */
+			if (jedec_read_mfr(map, base, cfi) != cfi->mfr ||
+			    jedec_read_id(map, base, cfi) != cfi->id) {
+				printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n",
+				       map->name, base, start);
+				return 0;
+			}
+			
+			/* Yes, it's actually got the device IDs as data. Most
+			 * unfortunate. Stick the new chip in read mode
+			 * too and if it's the same, assume it's an alias. */
+			/* FIXME: Use other modes to do a proper check */
+			jedec_reset(base, map, cfi);
+			if (jedec_read_mfr(map, base, cfi) == cfi->mfr &&
+			    jedec_read_id(map, base, cfi) == cfi->id) {
+				printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n",
+				       map->name, base, start);
+				return 0;
+			}
+		}
+	}
+		
+	/* OK, if we got to here, then none of the previous chips appear to
+	   be aliases for the current one. */
+	set_bit((base >> cfi->chipshift), chip_map); /* Update chip map */
+	cfi->numchips++;
+		
+ok_out:
+	/* Put it back into Read Mode */
+	jedec_reset(base, map, cfi);
+
+	printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n",
+	       map->name, cfi_interleave(cfi), cfi->device_type*8, base, 
+	       map->bankwidth*8);
+	
+	return 1;
+}
+
+static struct chip_probe jedec_chip_probe = {
+	.name = "JEDEC",
+	.probe_chip = jedec_probe_chip
+};
+
+static struct mtd_info *jedec_probe(struct map_info *map)
+{
+	/*
+	 * Just use the generic probe stuff to call our CFI-specific
+	 * chip_probe routine in all the possible permutations, etc.
+	 */
+	return mtd_do_chip_probe(map, &jedec_chip_probe);
+}
+
+static struct mtd_chip_driver jedec_chipdrv = {
+	.probe	= jedec_probe,
+	.name	= "jedec_probe",
+	.module	= THIS_MODULE
+};
+
+static int __init jedec_probe_init(void)
+{
+	register_mtd_chip_driver(&jedec_chipdrv);
+	return 0;
+}
+
+static void __exit jedec_probe_exit(void)
+{
+	unregister_mtd_chip_driver(&jedec_chipdrv);
+}
+
+module_init(jedec_probe_init);
+module_exit(jedec_probe_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Erwin Authried <eauth@softsys.co.at> et al.");
+MODULE_DESCRIPTION("Probe code for JEDEC-compliant flash chips");
diff --git a/drivers/mtd/chips/map_absent.c b/drivers/mtd/chips/map_absent.c
new file mode 100644
index 000000000000..c6c83833cc32
--- /dev/null
+++ b/drivers/mtd/chips/map_absent.c
@@ -0,0 +1,117 @@
+/*
+ * Common code to handle absent "placeholder" devices
+ * Copyright 2001 Resilience Corporation <ebrower@resilience.com>
+ * $Id: map_absent.c,v 1.5 2004/11/16 18:29:00 dwmw2 Exp $
+ *
+ * This map driver is used to allocate "placeholder" MTD
+ * devices on systems that have socketed/removable media. 
+ * Use of this driver as a fallback preserves the expected 
+ * registration of MTD device nodes regardless of probe outcome.
+ * A usage example is as follows:
+ *
+ *		my_dev[i] = do_map_probe("cfi", &my_map[i]);
+ *		if(NULL == my_dev[i]) {
+ *			my_dev[i] = do_map_probe("map_absent", &my_map[i]);
+ *		}
+ *
+ * Any device 'probed' with this driver will return -ENODEV
+ * upon open.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/compatmac.h>
+
+static int map_absent_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+static int map_absent_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int map_absent_erase (struct mtd_info *, struct erase_info *);
+static void map_absent_sync (struct mtd_info *);
+static struct mtd_info *map_absent_probe(struct map_info *map);
+static void map_absent_destroy (struct mtd_info *);
+
+
+static struct mtd_chip_driver map_absent_chipdrv = {
+	.probe		= map_absent_probe,
+	.destroy	= map_absent_destroy,
+	.name		= "map_absent",
+	.module		= THIS_MODULE
+};
+
+static struct mtd_info *map_absent_probe(struct map_info *map)
+{
+	struct mtd_info *mtd;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd) {
+		return NULL;
+	}
+
+	memset(mtd, 0, sizeof(*mtd));
+
+	map->fldrv 	= &map_absent_chipdrv;
+	mtd->priv 	= map;
+	mtd->name 	= map->name;
+	mtd->type 	= MTD_ABSENT;
+	mtd->size 	= map->size;
+	mtd->erase 	= map_absent_erase;
+	mtd->read 	= map_absent_read;
+	mtd->write 	= map_absent_write;
+	mtd->sync 	= map_absent_sync;
+	mtd->flags 	= 0;
+	mtd->erasesize = PAGE_SIZE;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+}
+
+
+static int map_absent_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	*retlen = 0;
+	return -ENODEV;
+}
+
+static int map_absent_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+	*retlen = 0;
+	return -ENODEV; 
+}
+
+static int map_absent_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	return -ENODEV;
+}
+
+static void map_absent_sync(struct mtd_info *mtd)
+{
+	/* nop */
+}
+
+static void map_absent_destroy(struct mtd_info *mtd)
+{
+	/* nop */
+}
+
+static int __init map_absent_init(void)
+{
+	register_mtd_chip_driver(&map_absent_chipdrv);
+	return 0;
+}
+
+static void __exit map_absent_exit(void)
+{
+	unregister_mtd_chip_driver(&map_absent_chipdrv);
+}
+
+module_init(map_absent_init);
+module_exit(map_absent_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Resilience Corporation - Eric Brower <ebrower@resilience.com>");
+MODULE_DESCRIPTION("Placeholder MTD chip driver for 'absent' chips");
diff --git a/drivers/mtd/chips/map_ram.c b/drivers/mtd/chips/map_ram.c
new file mode 100644
index 000000000000..bd2e876a814b
--- /dev/null
+++ b/drivers/mtd/chips/map_ram.c
@@ -0,0 +1,143 @@
+/*
+ * Common code to handle map devices which are simple RAM
+ * (C) 2000 Red Hat. GPL'd.
+ * $Id: map_ram.c,v 1.22 2005/01/05 18:05:12 dwmw2 Exp $
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/compatmac.h>
+
+
+static int mapram_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+static int mapram_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int mapram_erase (struct mtd_info *, struct erase_info *);
+static void mapram_nop (struct mtd_info *);
+static struct mtd_info *map_ram_probe(struct map_info *map);
+
+
+static struct mtd_chip_driver mapram_chipdrv = {
+	.probe	= map_ram_probe,
+	.name	= "map_ram",
+	.module	= THIS_MODULE
+};
+
+static struct mtd_info *map_ram_probe(struct map_info *map)
+{
+	struct mtd_info *mtd;
+
+	/* Check the first byte is RAM */
+#if 0
+	map_write8(map, 0x55, 0);
+	if (map_read8(map, 0) != 0x55)
+		return NULL;
+
+	map_write8(map, 0xAA, 0);
+	if (map_read8(map, 0) != 0xAA)
+		return NULL;
+
+	/* Check the last byte is RAM */
+	map_write8(map, 0x55, map->size-1);
+	if (map_read8(map, map->size-1) != 0x55)
+		return NULL;
+
+	map_write8(map, 0xAA, map->size-1);
+	if (map_read8(map, map->size-1) != 0xAA)
+		return NULL;
+#endif
+	/* OK. It seems to be RAM. */
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd)
+		return NULL;
+
+	memset(mtd, 0, sizeof(*mtd));
+
+	map->fldrv = &mapram_chipdrv;
+	mtd->priv = map;
+	mtd->name = map->name;
+	mtd->type = MTD_RAM;
+	mtd->size = map->size;
+	mtd->erase = mapram_erase;
+	mtd->read = mapram_read;
+	mtd->write = mapram_write;
+	mtd->sync = mapram_nop;
+	mtd->flags = MTD_CAP_RAM | MTD_VOLATILE;
+
+	mtd->erasesize = PAGE_SIZE;
+ 	while(mtd->size & (mtd->erasesize - 1))
+		mtd->erasesize >>= 1;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+}
+
+
+static int mapram_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+
+	map_copy_from(map, buf, from, len);
+	*retlen = len;
+	return 0;
+}
+
+static int mapram_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+
+	map_copy_to(map, to, buf, len);
+	*retlen = len;
+	return 0;
+}
+
+static int mapram_erase (struct mtd_info *mtd, struct erase_info *instr)
+{
+	/* Yeah, it's inefficient. Who cares? It's faster than a _real_
+	   flash erase. */
+	struct map_info *map = mtd->priv;
+	map_word allff;
+	unsigned long i;
+
+	allff = map_word_ff(map);
+
+	for (i=0; i<instr->len; i += map_bankwidth(map))
+		map_write(map, allff, instr->addr + i);
+
+	instr->state = MTD_ERASE_DONE;
+
+	mtd_erase_callback(instr);
+
+	return 0;
+}
+
+static void mapram_nop(struct mtd_info *mtd)
+{
+	/* Nothing to see here */
+}
+
+static int __init map_ram_init(void)
+{
+	register_mtd_chip_driver(&mapram_chipdrv);
+	return 0;
+}
+
+static void __exit map_ram_exit(void)
+{
+	unregister_mtd_chip_driver(&mapram_chipdrv);
+}
+
+module_init(map_ram_init);
+module_exit(map_ram_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("MTD chip driver for RAM chips");
diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c
new file mode 100644
index 000000000000..624c12c232c8
--- /dev/null
+++ b/drivers/mtd/chips/map_rom.c
@@ -0,0 +1,94 @@
+/*
+ * Common code to handle map devices which are simple ROM
+ * (C) 2000 Red Hat. GPL'd.
+ * $Id: map_rom.c,v 1.23 2005/01/05 18:05:12 dwmw2 Exp $
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/compatmac.h>
+
+static int maprom_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+static int maprom_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static void maprom_nop (struct mtd_info *);
+static struct mtd_info *map_rom_probe(struct map_info *map);
+
+static struct mtd_chip_driver maprom_chipdrv = {
+	.probe	= map_rom_probe,
+	.name	= "map_rom",
+	.module	= THIS_MODULE
+};
+
+static struct mtd_info *map_rom_probe(struct map_info *map)
+{
+	struct mtd_info *mtd;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if (!mtd)
+		return NULL;
+
+	memset(mtd, 0, sizeof(*mtd));
+
+	map->fldrv = &maprom_chipdrv;
+	mtd->priv = map;
+	mtd->name = map->name;
+	mtd->type = MTD_ROM;
+	mtd->size = map->size;
+	mtd->read = maprom_read;
+	mtd->write = maprom_write;
+	mtd->sync = maprom_nop;
+	mtd->flags = MTD_CAP_ROM;
+	mtd->erasesize = 131072;
+ 	while(mtd->size & (mtd->erasesize - 1))
+		mtd->erasesize >>= 1;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+}
+
+
+static int maprom_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+
+	map_copy_from(map, buf, from, len);
+	*retlen = len;
+	return 0;
+}
+
+static void maprom_nop(struct mtd_info *mtd)
+{
+	/* Nothing to see here */
+}
+
+static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+	printk(KERN_NOTICE "maprom_write called\n");
+	return -EIO;
+}
+
+static int __init map_rom_init(void)
+{
+	register_mtd_chip_driver(&maprom_chipdrv);
+	return 0;
+}
+
+static void __exit map_rom_exit(void)
+{
+	unregister_mtd_chip_driver(&maprom_chipdrv);
+}
+
+module_init(map_rom_init);
+module_exit(map_rom_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("MTD chip driver for ROM chips");
diff --git a/drivers/mtd/chips/sharp.c b/drivers/mtd/chips/sharp.c
new file mode 100644
index 000000000000..c3cf0f63bc93
--- /dev/null
+++ b/drivers/mtd/chips/sharp.c
@@ -0,0 +1,596 @@
+/*
+ * MTD chip driver for pre-CFI Sharp flash chips
+ *
+ * Copyright 2000,2001 David A. Schleef <ds@schleef.org>
+ *           2000,2001 Lineo, Inc.
+ *
+ * $Id: sharp.c,v 1.14 2004/08/09 13:19:43 dwmw2 Exp $
+ *
+ * Devices supported:
+ *   LH28F016SCT Symmetrical block flash memory, 2Mx8
+ *   LH28F008SCT Symmetrical block flash memory, 1Mx8
+ *
+ * Documentation:
+ *   http://www.sharpmeg.com/datasheets/memic/flashcmp/
+ *   http://www.sharpmeg.com/datasheets/memic/flashcmp/01symf/16m/016sctl9.pdf
+ *   016sctl9.pdf
+ *
+ * Limitations:
+ *   This driver only supports 4x1 arrangement of chips.
+ *   Not tested on anything but PowerPC.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/cfi.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+
+#define CMD_RESET		0xffffffff
+#define CMD_READ_ID		0x90909090
+#define CMD_READ_STATUS		0x70707070
+#define CMD_CLEAR_STATUS	0x50505050
+#define CMD_BLOCK_ERASE_1	0x20202020
+#define CMD_BLOCK_ERASE_2	0xd0d0d0d0
+#define CMD_BYTE_WRITE		0x40404040
+#define CMD_SUSPEND		0xb0b0b0b0
+#define CMD_RESUME		0xd0d0d0d0
+#define CMD_SET_BLOCK_LOCK_1	0x60606060
+#define CMD_SET_BLOCK_LOCK_2	0x01010101
+#define CMD_SET_MASTER_LOCK_1	0x60606060
+#define CMD_SET_MASTER_LOCK_2	0xf1f1f1f1
+#define CMD_CLEAR_BLOCK_LOCKS_1	0x60606060
+#define CMD_CLEAR_BLOCK_LOCKS_2	0xd0d0d0d0
+
+#define SR_READY		0x80808080 // 1 = ready
+#define SR_ERASE_SUSPEND	0x40404040 // 1 = block erase suspended
+#define SR_ERROR_ERASE		0x20202020 // 1 = error in block erase or clear lock bits
+#define SR_ERROR_WRITE		0x10101010 // 1 = error in byte write or set lock bit
+#define	SR_VPP			0x08080808 // 1 = Vpp is low
+#define SR_WRITE_SUSPEND	0x04040404 // 1 = byte write suspended
+#define SR_PROTECT		0x02020202 // 1 = lock bit set
+#define SR_RESERVED		0x01010101
+
+#define SR_ERRORS (SR_ERROR_ERASE|SR_ERROR_WRITE|SR_VPP|SR_PROTECT)
+
+/* Configuration options */
+
+#undef AUTOUNLOCK  /* automatically unlocks blocks before erasing */
+
+struct mtd_info *sharp_probe(struct map_info *);
+
+static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd);
+
+static int sharp_read(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, u_char *buf);
+static int sharp_write(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, const u_char *buf);
+static int sharp_erase(struct mtd_info *mtd, struct erase_info *instr);
+static void sharp_sync(struct mtd_info *mtd);
+static int sharp_suspend(struct mtd_info *mtd);
+static void sharp_resume(struct mtd_info *mtd);
+static void sharp_destroy(struct mtd_info *mtd);
+
+static int sharp_write_oneword(struct map_info *map, struct flchip *chip,
+	unsigned long adr, __u32 datum);
+static int sharp_erase_oneblock(struct map_info *map, struct flchip *chip,
+	unsigned long adr);
+#ifdef AUTOUNLOCK
+static void sharp_unlock_oneblock(struct map_info *map, struct flchip *chip,
+	unsigned long adr);
+#endif
+
+
+struct sharp_info{
+	struct flchip *chip;
+	int bogus;
+	int chipshift;
+	int numchips;
+	struct flchip chips[1];
+};
+
+struct mtd_info *sharp_probe(struct map_info *map);
+static void sharp_destroy(struct mtd_info *mtd);
+
+static struct mtd_chip_driver sharp_chipdrv = {
+	.probe		= sharp_probe,
+	.destroy	= sharp_destroy,
+	.name		= "sharp",
+	.module		= THIS_MODULE
+};
+
+
+struct mtd_info *sharp_probe(struct map_info *map)
+{
+	struct mtd_info *mtd = NULL;
+	struct sharp_info *sharp = NULL;
+	int width;
+
+	mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
+	if(!mtd)
+		return NULL;
+
+	sharp = kmalloc(sizeof(*sharp), GFP_KERNEL);
+	if(!sharp) {
+		kfree(mtd);
+		return NULL;
+	}
+
+	memset(mtd, 0, sizeof(*mtd));
+
+	width = sharp_probe_map(map,mtd);
+	if(!width){
+		kfree(mtd);
+		kfree(sharp);
+		return NULL;
+	}
+
+	mtd->priv = map;
+	mtd->type = MTD_NORFLASH;
+	mtd->erase = sharp_erase;
+	mtd->read = sharp_read;
+	mtd->write = sharp_write;
+	mtd->sync = sharp_sync;
+	mtd->suspend = sharp_suspend;
+	mtd->resume = sharp_resume;
+	mtd->flags = MTD_CAP_NORFLASH;
+	mtd->name = map->name;
+
+	memset(sharp, 0, sizeof(*sharp));
+	sharp->chipshift = 23;
+	sharp->numchips = 1;
+	sharp->chips[0].start = 0;
+	sharp->chips[0].state = FL_READY;
+	sharp->chips[0].mutex = &sharp->chips[0]._spinlock;
+	sharp->chips[0].word_write_time = 0;
+	init_waitqueue_head(&sharp->chips[0].wq);
+	spin_lock_init(&sharp->chips[0]._spinlock);
+
+	map->fldrv = &sharp_chipdrv;
+	map->fldrv_priv = sharp;
+
+	__module_get(THIS_MODULE);
+	return mtd;
+}
+
+static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd)
+{
+	unsigned long tmp;
+	unsigned long base = 0;
+	u32 read0, read4;
+	int width = 4;
+
+	tmp = map_read32(map, base+0);
+
+	map_write32(map, CMD_READ_ID, base+0);
+
+	read0=map_read32(map, base+0);
+	read4=map_read32(map, base+4);
+	if(read0 == 0x89898989){
+		printk("Looks like sharp flash\n");
+		switch(read4){
+		case 0xaaaaaaaa:
+		case 0xa0a0a0a0:
+			/* aa - LH28F016SCT-L95 2Mx8, 32 64k blocks*/
+			/* a0 - LH28F016SCT-Z4  2Mx8, 32 64k blocks*/
+			mtd->erasesize = 0x10000 * width;
+			mtd->size = 0x200000 * width;
+			return width;
+		case 0xa6a6a6a6:
+			/* a6 - LH28F008SCT-L12 1Mx8, 16 64k blocks*/
+			/* a6 - LH28F008SCR-L85 1Mx8, 16 64k blocks*/
+			mtd->erasesize = 0x10000 * width;
+			mtd->size = 0x100000 * width;
+			return width;
+#if 0
+		case 0x00000000: /* unknown */
+			/* XX - LH28F004SCT 512kx8, 8 64k blocks*/
+			mtd->erasesize = 0x10000 * width;
+			mtd->size = 0x80000 * width;
+			return width;
+#endif
+		default:
+			printk("Sort-of looks like sharp flash, 0x%08x 0x%08x\n",
+				read0,read4);
+		}
+	}else if((map_read32(map, base+0) == CMD_READ_ID)){
+		/* RAM, probably */
+		printk("Looks like RAM\n");
+		map_write32(map, tmp, base+0);
+	}else{
+		printk("Doesn't look like sharp flash, 0x%08x 0x%08x\n",
+			read0,read4);
+	}
+
+	return 0;
+}
+
+/* This function returns with the chip->mutex lock held. */
+static int sharp_wait(struct map_info *map, struct flchip *chip)
+{
+	__u16 status;
+	unsigned long timeo = jiffies + HZ;
+	DECLARE_WAITQUEUE(wait, current);
+	int adr = 0;
+
+retry:
+	spin_lock_bh(chip->mutex);
+
+	switch(chip->state){
+	case FL_READY:
+		map_write32(map,CMD_READ_STATUS,adr);
+		chip->state = FL_STATUS;
+	case FL_STATUS:
+		status = map_read32(map,adr);
+//printk("status=%08x\n",status);
+
+		udelay(100);
+		if((status & SR_READY)!=SR_READY){
+//printk(".status=%08x\n",status);
+			udelay(100);
+		}
+		break;
+	default:
+		printk("Waiting for chip\n");
+
+		set_current_state(TASK_INTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+
+		spin_unlock_bh(chip->mutex);
+
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+
+		if(signal_pending(current))
+			return -EINTR;
+
+		timeo = jiffies + HZ;
+
+		goto retry;
+	}
+
+	map_write32(map,CMD_RESET, adr);
+
+	chip->state = FL_READY;
+
+	return 0;
+}
+
+static void sharp_release(struct flchip *chip)
+{
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+}
+
+static int sharp_read(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct sharp_info *sharp = map->fldrv_priv;
+	int chipnum;
+	int ret = 0;
+	int ofs = 0;
+
+	chipnum = (from >> sharp->chipshift);
+	ofs = from & ((1 << sharp->chipshift)-1);
+
+	*retlen = 0;
+
+	while(len){
+		unsigned long thislen;
+
+		if(chipnum>=sharp->numchips)
+			break;
+
+		thislen = len;
+		if(ofs+thislen >= (1<<sharp->chipshift))
+			thislen = (1<<sharp->chipshift) - ofs;
+
+		ret = sharp_wait(map,&sharp->chips[chipnum]);
+		if(ret<0)
+			break;
+
+		map_copy_from(map,buf,ofs,thislen);
+
+		sharp_release(&sharp->chips[chipnum]);
+
+		*retlen += thislen;
+		len -= thislen;
+		buf += thislen;
+
+		ofs = 0;
+		chipnum++;
+	}
+	return ret;
+}
+
+static int sharp_write(struct mtd_info *mtd, loff_t to, size_t len,
+	size_t *retlen, const u_char *buf)
+{
+	struct map_info *map = mtd->priv;
+	struct sharp_info *sharp = map->fldrv_priv;
+	int ret = 0;
+	int i,j;
+	int chipnum;
+	unsigned long ofs;
+	union { u32 l; unsigned char uc[4]; } tbuf;
+
+	*retlen = 0;
+
+	while(len){
+		tbuf.l = 0xffffffff;
+		chipnum = to >> sharp->chipshift;
+		ofs = to & ((1<<sharp->chipshift)-1);
+
+		j=0;
+		for(i=ofs&3;i<4 && len;i++){
+			tbuf.uc[i] = *buf;
+			buf++;
+			to++;
+			len--;
+			j++;
+		}
+		sharp_write_oneword(map, &sharp->chips[chipnum], ofs&~3, tbuf.l);
+		if(ret<0)
+			return ret;
+		(*retlen)+=j;
+	}
+
+	return 0;
+}
+
+static int sharp_write_oneword(struct map_info *map, struct flchip *chip,
+	unsigned long adr, __u32 datum)
+{
+	int ret;
+	int timeo;
+	int try;
+	int i;
+	int status = 0;
+
+	ret = sharp_wait(map,chip);
+
+	for(try=0;try<10;try++){
+		map_write32(map,CMD_BYTE_WRITE,adr);
+		/* cpu_to_le32 -> hack to fix the writel be->le conversion */
+		map_write32(map,cpu_to_le32(datum),adr);
+
+		chip->state = FL_WRITING;
+
+		timeo = jiffies + (HZ/2);
+
+		map_write32(map,CMD_READ_STATUS,adr);
+		for(i=0;i<100;i++){
+			status = map_read32(map,adr);
+			if((status & SR_READY)==SR_READY)
+				break;
+		}
+		if(i==100){
+			printk("sharp: timed out writing\n");
+		}
+
+		if(!(status&SR_ERRORS))
+			break;
+
+		printk("sharp: error writing byte at addr=%08lx status=%08x\n",adr,status);
+
+		map_write32(map,CMD_CLEAR_STATUS,adr);
+	}
+	map_write32(map,CMD_RESET,adr);
+	chip->state = FL_READY;
+
+	wake_up(&chip->wq);
+	spin_unlock_bh(chip->mutex);
+
+	return 0;
+}
+
+static int sharp_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	struct map_info *map = mtd->priv;
+	struct sharp_info *sharp = map->fldrv_priv;
+	unsigned long adr,len;
+	int chipnum, ret=0;
+
+//printk("sharp_erase()\n");
+	if(instr->addr & (mtd->erasesize - 1))
+		return -EINVAL;
+	if(instr->len & (mtd->erasesize - 1))
+		return -EINVAL;
+	if(instr->len + instr->addr > mtd->size)
+		return -EINVAL;
+
+	chipnum = instr->addr >> sharp->chipshift;
+	adr = instr->addr & ((1<<sharp->chipshift)-1);
+	len = instr->len;
+
+	while(len){
+		ret = sharp_erase_oneblock(map, &sharp->chips[chipnum], adr);
+		if(ret)return ret;
+
+		adr += mtd->erasesize;
+		len -= mtd->erasesize;
+		if(adr >> sharp->chipshift){
+			adr = 0;
+			chipnum++;
+			if(chipnum>=sharp->numchips)
+				break;
+		}
+	}
+
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+
+	return 0;
+}
+
+static int sharp_do_wait_for_ready(struct map_info *map, struct flchip *chip,
+	unsigned long adr)
+{
+	int ret;
+	unsigned long timeo;
+	int status;
+	DECLARE_WAITQUEUE(wait, current);
+
+	map_write32(map,CMD_READ_STATUS,adr);
+	status = map_read32(map,adr);
+
+	timeo = jiffies + HZ;
+
+	while(time_before(jiffies, timeo)){
+		map_write32(map,CMD_READ_STATUS,adr);
+		status = map_read32(map,adr);
+		if((status & SR_READY)==SR_READY){
+			ret = 0;
+			goto out;
+		}
+		set_current_state(TASK_INTERRUPTIBLE);
+		add_wait_queue(&chip->wq, &wait);
+
+		//spin_unlock_bh(chip->mutex);
+
+		schedule_timeout(1);
+		schedule();
+		remove_wait_queue(&chip->wq, &wait);
+
+		//spin_lock_bh(chip->mutex);
+		
+		if (signal_pending(current)){
+			ret = -EINTR;
+			goto out;
+		}
+		
+	}
+	ret = -ETIME;
+out:
+	return ret;
+}
+
+static int sharp_erase_oneblock(struct map_info *map, struct flchip *chip,
+	unsigned long adr)
+{
+	int ret;
+	//int timeo;
+	int status;
+	//int i;
+
+//printk("sharp_erase_oneblock()\n");
+
+#ifdef AUTOUNLOCK
+	/* This seems like a good place to do an unlock */
+	sharp_unlock_oneblock(map,chip,adr);
+#endif
+
+	map_write32(map,CMD_BLOCK_ERASE_1,adr);
+	map_write32(map,CMD_BLOCK_ERASE_2,adr);
+
+	chip->state = FL_ERASING;
+
+	ret = sharp_do_wait_for_ready(map,chip,adr);
+	if(ret<0)return ret;
+
+	map_write32(map,CMD_READ_STATUS,adr);
+	status = map_read32(map,adr);
+
+	if(!(status&SR_ERRORS)){
+		map_write32(map,CMD_RESET,adr);
+		chip->state = FL_READY;
+		//spin_unlock_bh(chip->mutex);
+		return 0;
+	}
+
+	printk("sharp: error erasing block at addr=%08lx status=%08x\n",adr,status);
+	map_write32(map,CMD_CLEAR_STATUS,adr);
+
+	//spin_unlock_bh(chip->mutex);
+
+	return -EIO;
+}
+
+#ifdef AUTOUNLOCK
+static void sharp_unlock_oneblock(struct map_info *map, struct flchip *chip,
+	unsigned long adr)
+{
+	int i;
+	int status;
+
+	map_write32(map,CMD_CLEAR_BLOCK_LOCKS_1,adr);
+	map_write32(map,CMD_CLEAR_BLOCK_LOCKS_2,adr);
+
+	udelay(100);
+
+	status = map_read32(map,adr);
+	printk("status=%08x\n",status);
+
+	for(i=0;i<1000;i++){
+		//map_write32(map,CMD_READ_STATUS,adr);
+		status = map_read32(map,adr);
+		if((status & SR_READY)==SR_READY)
+			break;
+		udelay(100);
+	}
+	if(i==1000){
+		printk("sharp: timed out unlocking block\n");
+	}
+
+	if(!(status&SR_ERRORS)){
+		map_write32(map,CMD_RESET,adr);
+		chip->state = FL_READY;
+		return;
+	}
+
+	printk("sharp: error unlocking block at addr=%08lx status=%08x\n",adr,status);
+	map_write32(map,CMD_CLEAR_STATUS,adr);
+}
+#endif
+
+static void sharp_sync(struct mtd_info *mtd)
+{
+	//printk("sharp_sync()\n");
+}
+
+static int sharp_suspend(struct mtd_info *mtd)
+{
+	printk("sharp_suspend()\n");
+	return -EINVAL;
+}
+
+static void sharp_resume(struct mtd_info *mtd)
+{
+	printk("sharp_resume()\n");
+	
+}
+
+static void sharp_destroy(struct mtd_info *mtd)
+{
+	printk("sharp_destroy()\n");
+
+}
+
+int __init sharp_probe_init(void)
+{
+	printk("MTD Sharp chip driver <ds@lineo.com>\n");
+
+	register_mtd_chip_driver(&sharp_chipdrv);
+
+	return 0;
+}
+
+static void __exit sharp_probe_exit(void)
+{
+	unregister_mtd_chip_driver(&sharp_chipdrv);
+}
+
+module_init(sharp_probe_init);
+module_exit(sharp_probe_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Schleef <ds@schleef.org>");
+MODULE_DESCRIPTION("Old MTD chip driver for pre-CFI Sharp flash chips");