Merge git://git.infradead.org/mtd-2.6

* git://git.infradead.org/mtd-2.6: (63 commits)
  mtd: OneNAND: Allow setting of boundary information when built as module
  jffs2: leaking jffs2_summary in function jffs2_scan_medium
  mtd: nand: Fix memory leak on txx9ndfmc probe failure.
  mtd: orion_nand: use burst reads with double word accesses
  mtd/nand: s3c6400 support for s3c2410 driver
  [MTD] [NAND] S3C2410: Use DIV_ROUND_UP
  [MTD] [NAND] S3C2410: Deal with unaligned lengths in S3C2440 buffer read/write
  [MTD] [NAND] S3C2410: Allow the machine code to get the BBT table from NAND
  [MTD] [NAND] S3C2410: Added a kerneldoc for s3c2410_nand_set
  mtd: physmap_of: Add multiple regions and concatenation support
  mtd: nand: max_retries off by one in mxc_nand
  mtd: nand: s3c2410_nand_setrate(): use correct macros for 2412/2440
  mtd: onenand: add bbt_wait & unlock_all as replaceable for some platform
  mtd: Flex-OneNAND support
  mtd: nand: add OMAP2/OMAP3 NAND driver
  mtd: maps: Blackfin async: fix memory leaks in probe/remove funcs
  mtd: uclinux: mark local stuff static
  mtd: uclinux: do not allow to be built as a module
  mtd: uclinux: allow systems to override map addr/size
  mtd: blackfin NFC: fix hang when using NAND on BF527-EZKITs
  ...

Documentation/ABI/testing/sysfs-class-mtd

+What:		/sys/class/mtd/
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		The mtd/ class subdirectory belongs to the MTD subsystem
+		(MTD core).
+
+What:		/sys/class/mtd/mtdX/
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		The /sys/class/mtd/mtd{0,1,2,3,...} directories correspond
+		to each /dev/mtdX character device.  These may represent
+		physical/simulated flash devices, partitions on a flash
+		device, or concatenated flash devices.  They exist regardless
+		of whether CONFIG_MTD_CHAR is actually enabled.
+
+What:		/sys/class/mtd/mtdXro/
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		These directories provide the corresponding read-only device
+		nodes for /sys/class/mtd/mtdX/ .  They are only created
+		(for the benefit of udev) if CONFIG_MTD_CHAR is enabled.
+
+What:		/sys/class/mtd/mtdX/dev
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		Major and minor numbers of the character device corresponding
+		to this MTD device (in <major>:<minor> format).  This is the
+		read-write device so <minor> will be even.
+
+What:		/sys/class/mtd/mtdXro/dev
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		Major and minor numbers of the character device corresponding
+		to the read-only variant of thie MTD device (in
+		<major>:<minor> format).  In this case <minor> will be odd.
+
+What:		/sys/class/mtd/mtdX/erasesize
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		"Major" erase size for the device.  If numeraseregions is
+		zero, this is the eraseblock size for the entire device.
+		Otherwise, the MEMGETREGIONCOUNT/MEMGETREGIONINFO ioctls
+		can be used to determine the actual eraseblock layout.
+
+What:		/sys/class/mtd/mtdX/flags
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		A hexadecimal value representing the device flags, ORed
+		together:
+
+		0x0400: MTD_WRITEABLE - device is writable
+		0x0800: MTD_BIT_WRITEABLE - single bits can be flipped
+		0x1000: MTD_NO_ERASE - no erase necessary
+		0x2000: MTD_POWERUP_LOCK - always locked after reset
+
+What:		/sys/class/mtd/mtdX/name
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		A human-readable ASCII name for the device or partition.
+		This will match the name in /proc/mtd .
+
+What:		/sys/class/mtd/mtdX/numeraseregions
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		For devices that have variable eraseblock sizes, this
+		provides the total number of erase regions.  Otherwise,
+		it will read back as zero.
+
+What:		/sys/class/mtd/mtdX/oobsize
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		Number of OOB bytes per page.
+
+What:		/sys/class/mtd/mtdX/size
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		Total size of the device/partition, in bytes.
+
+What:		/sys/class/mtd/mtdX/type
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		One of the following ASCII strings, representing the device
+		type:
+
+		absent, ram, rom, nor, nand, dataflash, ubi, unknown
+
+What:		/sys/class/mtd/mtdX/writesize
+Date:		April 2009
+KernelVersion:	2.6.29
+Contact:	linux-mtd@lists.infradead.org
+Description:
+		Minimal writable flash unit size.  This will always be
+		a positive integer.
+
+		In the case of NOR flash it is 1 (even though individual
+		bits can be cleared).
+
+		In the case of NAND flash it is one NAND page (or a
+		half page, or a quarter page).
+
+		In the case of ECC NOR, it is the ECC block size.

Documentation/kernel-parameters.txt

@@ -1431,6 +1431,16 @@ and is between 256 and 4096 characters. It is defined in the file
 	mtdparts=	[MTD]
 			See drivers/mtd/cmdlinepart.c.
 
+	onenand.bdry=	[HW,MTD] Flex-OneNAND Boundary Configuration
+
+			Format: [die0_boundary][,die0_lock][,die1_boundary][,die1_lock]
+
+			boundary - index of last SLC block on Flex-OneNAND.
+				   The remaining blocks are configured as MLC blocks.
+			lock	 - Configure if Flex-OneNAND boundary should be locked.
+				   Once locked, the boundary cannot be changed.
+				   1 indicates lock status, 0 indicates unlock status.
+
 	mtdset=		[ARM]
 			ARM/S3C2412 JIVE boot control
 

MAINTAINERS

@@ -3252,7 +3252,6 @@ W:	http://www.linux-mtd.infradead.org/doc/jffs2.html
 S:	Maintained
 F:	fs/jffs2/
 F:	include/linux/jffs2.h
-F:	include/mtd/jffs2-user.h
 
 JOURNALLING LAYER FOR BLOCK DEVICES (JBD)
 P:	Stephen Tweedie

arch/arm/mach-davinci/include/mach/nand.h

@@ -68,10 +68,14 @@ struct davinci_nand_pdata {		/* platform_data */
 
 	/* none  == NAND_ECC_NONE (strongly *not* advised!!)
 	 * soft  == NAND_ECC_SOFT
-	 * 1-bit == NAND_ECC_HW
-	 * 4-bit == NAND_ECC_HW_SYNDROME (not on all chips)
+	 * else  == NAND_ECC_HW, according to ecc_bits
+	 *
+	 * All DaVinci-family chips support 1-bit hardware ECC.
+	 * Newer ones also support 4-bit ECC, but are awkward
+	 * using it with large page chips.
 	 */
 	nand_ecc_modes_t	ecc_mode;
+	u8			ecc_bits;
 
 	/* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
 	unsigned		options;

arch/arm/plat-s3c/include/plat/nand.h

@@ -10,19 +10,26 @@
  * published by the Free Software Foundation.
 */
 
-/* struct s3c2410_nand_set
+/**
+ * struct s3c2410_nand_set - define a set of one or more nand chips
+ * @disable_ecc:	Entirely disable ECC - Dangerous
+ * @flash_bbt: 		Openmoko u-boot can create a Bad Block Table
+ *			Setting this flag will allow the kernel to
+ *			look for it at boot time and also skip the NAND
+ *			scan.
+ * @nr_chips:		Number of chips in this set
+ * @nr_partitions:	Number of partitions pointed to by @partitions
+ * @name:		Name of set (optional)
+ * @nr_map:		Map for low-layer logical to physical chip numbers (option)
+ * @partitions:		The mtd partition list
  *
- * define an set of one or more nand chips registered with an unique mtd
- *
- * nr_chips	 = number of chips in this set
- * nr_partitions = number of partitions pointed to be partitoons (or zero)
- * name		 = name of set (optional)
- * nr_map	 = map for low-layer logical to physical chip numbers (option)
- * partitions	 = mtd partition list
-*/
-
+ * define a set of one or more nand chips registered with an unique mtd. Also
+ * allows to pass flag to the underlying NAND layer. 'disable_ecc' will trigger
+ * a warning at boot time.
+ */
 struct s3c2410_nand_set {
-	unsigned int		disable_ecc : 1;
+	unsigned int		disable_ecc:1;
+	unsigned int		flash_bbt:1;
 
 	int			nr_chips;
 	int			nr_partitions;
@@ -39,7 +46,7 @@ struct s3c2410_platform_nand {
 	int	twrph0;	/* active time for nWE/nOE */
 	int	twrph1;	/* time for release CLE/ALE from nWE/nOE inactive */
 
-	unsigned int	ignore_unset_ecc : 1;
+	unsigned int	ignore_unset_ecc:1;
 
 	int			nr_sets;
 	struct s3c2410_nand_set *sets;

drivers/mtd/chips/cfi_cmdset_0001.c

@@ -46,6 +46,7 @@
 #define MANUFACTURER_INTEL	0x0089
 #define I82802AB	0x00ad
 #define I82802AC	0x00ac
+#define PF38F4476	0x881c
 #define MANUFACTURER_ST         0x0020
 #define M50LPW080       0x002F
 #define M50FLW080A	0x0080
@@ -315,10 +316,20 @@ static struct cfi_fixup fixup_table[] = {
 	{ 0, 0, NULL, NULL }
 };
 
+static void cfi_fixup_major_minor(struct cfi_private *cfi,
+						struct cfi_pri_intelext *extp)
+{
+	if (cfi->mfr == MANUFACTURER_INTEL &&
+			cfi->id == PF38F4476 && extp->MinorVersion == '3')
+		extp->MinorVersion = '1';
+}
+
 static inline struct cfi_pri_intelext *
 read_pri_intelext(struct map_info *map, __u16 adr)
 {
+	struct cfi_private *cfi = map->fldrv_priv;
 	struct cfi_pri_intelext *extp;
+	unsigned int extra_size = 0;
 	unsigned int extp_size = sizeof(*extp);
 
  again:
@@ -326,6 +337,8 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 	if (!extp)
 		return NULL;
 
+	cfi_fixup_major_minor(cfi, extp);
+
 	if (extp->MajorVersion != '1' ||
 	    (extp->MinorVersion < '0' || extp->MinorVersion > '5')) {
 		printk(KERN_ERR "  Unknown Intel/Sharp Extended Query "
@@ -340,19 +353,24 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 	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;
+	if (extp->MinorVersion >= '0') {
+		extra_size = 0;
 
 		/* Protection Register info */
 		extra_size += (extp->NumProtectionFields - 1) *
 			      sizeof(struct cfi_intelext_otpinfo);
+	}
 
+	if (extp->MinorVersion >= '1') {
 		/* Burst Read info */
 		extra_size += 2;
 		if (extp_size < sizeof(*extp) + extra_size)
 			goto need_more;
-		extra_size += extp->extra[extra_size-1];
+		extra_size += extp->extra[extra_size - 1];
+	}
+
+	if (extp->MinorVersion >= '3') {
+		int nb_parts, i;
 
 		/* Number of hardware-partitions */
 		extra_size += 1;

drivers/mtd/chips/jedec_probe.c

@@ -166,6 +166,7 @@
 #define SST39LF040	0x00D7
 #define SST39SF010A	0x00B5
 #define SST39SF020A	0x00B6
+#define SST39SF040	0x00B7
 #define SST49LF004B	0x0060
 #define SST49LF040B	0x0050
 #define SST49LF008A	0x005a
@@ -1391,6 +1392,18 @@ static const struct amd_flash_info jedec_table[] = {
 		.regions	= {
 			ERASEINFO(0x01000,64),
 		}
+	}, {
+		.mfr_id		= MANUFACTURER_SST,
+		.dev_id		= SST39SF040,
+		.name		= "SST 39SF040",
+		.devtypes	= CFI_DEVICETYPE_X8,
+		.uaddr		= MTD_UADDR_0x5555_0x2AAA,
+		.dev_size	= SIZE_512KiB,
+		.cmd_set	= P_ID_AMD_STD,
+		.nr_regions	= 1,
+		.regions	= {
+			ERASEINFO(0x01000,128),
+		}
 	}, {
 		.mfr_id		= MANUFACTURER_SST,
 		.dev_id		= SST49LF040B,

drivers/mtd/devices/m25p80.c

@@ -500,6 +500,9 @@ static struct flash_info __devinitdata m25p_data [] = {
 	{ "at26df161a", 0x1f4601, 0, 64 * 1024, 32, SECT_4K, },
 	{ "at26df321",  0x1f4701, 0, 64 * 1024, 64, SECT_4K, },
 
+	/* Macronix */
+	{ "mx25l12805d", 0xc22018, 0, 64 * 1024, 256, },
+
 	/* Spansion -- single (large) sector size only, at least
 	 * for the chips listed here (without boot sectors).
 	 */
@@ -528,6 +531,7 @@ static struct flash_info __devinitdata m25p_data [] = {
 	{ "m25p64",  0x202017,  0, 64 * 1024, 128, },
 	{ "m25p128", 0x202018, 0, 256 * 1024, 64, },
 
+	{ "m45pe10", 0x204011,  0, 64 * 1024, 2, },
 	{ "m45pe80", 0x204014,  0, 64 * 1024, 16, },
 	{ "m45pe16", 0x204015,  0, 64 * 1024, 32, },
 

drivers/mtd/maps/Kconfig

@@ -105,15 +105,6 @@ config MSP_FLASH_MAP_LIMIT
 	default "0x02000000"
 	depends on MSP_FLASH_MAP_LIMIT_32M
 
-config MTD_PMC_MSP_RAMROOT
-	tristate "Embedded RAM block device for root on PMC-Sierra MSP"
-	depends on PMC_MSP_EMBEDDED_ROOTFS && \
-			(MTD_BLOCK || MTD_BLOCK_RO) && \
-			MTD_RAM
-	help
-	  This provides support for the embedded root file system
-          on PMC MSP devices.  This memory is mapped as a MTD block device.
-
 config MTD_SUN_UFLASH
 	tristate "Sun Microsystems userflash support"
 	depends on SPARC && MTD_CFI && PCI
@@ -270,7 +261,7 @@ config MTD_ALCHEMY
 
 config MTD_DILNETPC
 	tristate "CFI Flash device mapped on DIL/Net PC"
-	depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
+	depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
 	help
 	  MTD map driver for SSV DIL/Net PC Boards "DNP" and "ADNP".
 	  For details, see <http://www.ssv-embedded.de/ssv/pc104/p169.htm>
@@ -501,7 +492,7 @@ config MTD_BFIN_ASYNC
 	  If compiled as a module, it will be called bfin-async-flash.
 
 config MTD_UCLINUX
-	tristate "Generic uClinux RAM/ROM filesystem support"
+	bool "Generic uClinux RAM/ROM filesystem support"
 	depends on MTD_PARTITIONS && MTD_RAM && !MMU
 	help
 	  Map driver to support image based filesystems for uClinux.

drivers/mtd/maps/Makefile

@@ -25,7 +25,6 @@ obj-$(CONFIG_MTD_OCTAGON)	+= octagon-5066.o
 obj-$(CONFIG_MTD_PHYSMAP)	+= physmap.o
 obj-$(CONFIG_MTD_PHYSMAP_OF)	+= physmap_of.o
 obj-$(CONFIG_MTD_PMC_MSP_EVM)   += pmcmsp-flash.o
-obj-$(CONFIG_MTD_PMC_MSP_RAMROOT)+= pmcmsp-ramroot.o
 obj-$(CONFIG_MTD_PCMCIA)	+= pcmciamtd.o
 obj-$(CONFIG_MTD_RPXLITE)	+= rpxlite.o
 obj-$(CONFIG_MTD_TQM8XXL)	+= tqm8xxl.o

drivers/mtd/maps/bfin-async-flash.c

@@ -40,6 +40,9 @@ struct async_state {
 	uint32_t flash_ambctl0, flash_ambctl1;
 	uint32_t save_ambctl0, save_ambctl1;
 	unsigned long irq_flags;
+#ifdef CONFIG_MTD_PARTITIONS
+	struct mtd_partition *parts;
+#endif
 };
 
 static void switch_to_flash(struct async_state *state)
@@ -170,6 +173,7 @@ static int __devinit bfin_flash_probe(struct platform_device *pdev)
 	if (ret > 0) {
 		pr_devinit(KERN_NOTICE DRIVER_NAME ": Using commandline partition definition\n");
 		add_mtd_partitions(state->mtd, pdata->parts, ret);
+		state->parts = pdata->parts;
 
 	} else if (pdata->nr_parts) {
 		pr_devinit(KERN_NOTICE DRIVER_NAME ": Using board partition definition\n");
@@ -193,6 +197,7 @@ static int __devexit bfin_flash_remove(struct platform_device *pdev)
 	gpio_free(state->enet_flash_pin);
 #ifdef CONFIG_MTD_PARTITIONS
 	del_mtd_partitions(state->mtd);
+	kfree(state->parts);
 #endif
 	map_destroy(state->mtd);
 	kfree(state);

drivers/mtd/maps/integrator-flash.c

@@ -36,27 +36,33 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
+#include <linux/mtd/concat.h>
 
 #include <asm/mach/flash.h>
 #include <mach/hardware.h>
 #include <asm/system.h>
 
-#ifdef CONFIG_ARCH_P720T
-#define FLASH_BASE		(0x04000000)
-#define FLASH_SIZE		(64*1024*1024)
-#endif
+#define SUBDEV_NAME_SIZE	(BUS_ID_SIZE + 2)
 
-struct armflash_info {
+struct armflash_subdev_info {
+	char			name[SUBDEV_NAME_SIZE];
+	struct mtd_info		*mtd;
+	struct map_info		map;
 	struct flash_platform_data *plat;
+};
+
+struct armflash_info {
 	struct resource		*res;
 	struct mtd_partition	*parts;
 	struct mtd_info		*mtd;
-	struct map_info		map;
+	int			nr_subdev;
+	struct armflash_subdev_info subdev[0];
 };
 
 static void armflash_set_vpp(struct map_info *map, int on)
 {
-	struct armflash_info *info = container_of(map, struct armflash_info, map);
+	struct armflash_subdev_info *info =
+		container_of(map, struct armflash_subdev_info, map);
 
 	if (info->plat && info->plat->set_vpp)
 		info->plat->set_vpp(on);
@@ -64,32 +70,17 @@ static void armflash_set_vpp(struct map_info *map, int on)
 
 static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL };
 
-static int armflash_probe(struct platform_device *dev)
+static int armflash_subdev_probe(struct armflash_subdev_info *subdev,
+				 struct resource *res)
 {
-	struct flash_platform_data *plat = dev->dev.platform_data;
-	struct resource *res = dev->resource;
-	unsigned int size = res->end - res->start + 1;
-	struct armflash_info *info;
-	int err;
+	struct flash_platform_data *plat = subdev->plat;
+	resource_size_t size = res->end - res->start + 1;
 	void __iomem *base;
+	int err = 0;
 
-	info = kzalloc(sizeof(struct armflash_info), GFP_KERNEL);
-	if (!info) {
-		err = -ENOMEM;
-		goto out;
-	}
-
-	info->plat = plat;
-	if (plat && plat->init) {
-		err = plat->init();
-		if (err)
-			goto no_resource;
-	}
-
-	info->res = request_mem_region(res->start, size, "armflash");
-	if (!info->res) {
+	if (!request_mem_region(res->start, size, subdev->name)) {
 		err = -EBUSY;
-		goto no_resource;
+		goto out;
 	}
 
 	base = ioremap(res->start, size);
@@ -101,27 +92,132 @@ static int armflash_probe(struct platform_device *dev)
 	/*
 	 * look for CFI based flash parts fitted to this board
 	 */
-	info->map.size		= size;
-	info->map.bankwidth	= plat->width;
-	info->map.phys		= res->start;
-	info->map.virt		= base;
-	info->map.name		= dev_name(&dev->dev);
-	info->map.set_vpp	= armflash_set_vpp;
+	subdev->map.size	= size;
+	subdev->map.bankwidth	= plat->width;
+	subdev->map.phys	= res->start;
+	subdev->map.virt	= base;
+	subdev->map.name	= subdev->name;
+	subdev->map.set_vpp	= armflash_set_vpp;
 
-	simple_map_init(&info->map);
+	simple_map_init(&subdev->map);
 
 	/*
 	 * Also, the CFI layer automatically works out what size
 	 * of chips we have, and does the necessary identification
 	 * for us automatically.
 	 */
-	info->mtd = do_map_probe(plat->map_name, &info->map);
-	if (!info->mtd) {
+	subdev->mtd = do_map_probe(plat->map_name, &subdev->map);
+	if (!subdev->mtd) {
 		err = -ENXIO;
 		goto no_device;
 	}
 
-	info->mtd->owner = THIS_MODULE;
+	subdev->mtd->owner = THIS_MODULE;
+
+	/* Successful? */
+	if (err == 0)
+		return err;
+
+	if (subdev->mtd)
+		map_destroy(subdev->mtd);
+ no_device:
+	iounmap(base);
+ no_mem:
+	release_mem_region(res->start, size);
+ out:
+	return err;
+}
+
+static void armflash_subdev_remove(struct armflash_subdev_info *subdev)
+{
+	if (subdev->mtd)
+		map_destroy(subdev->mtd);
+	if (subdev->map.virt)
+		iounmap(subdev->map.virt);
+	release_mem_region(subdev->map.phys, subdev->map.size);
+}
+
+static int armflash_probe(struct platform_device *dev)
+{
+	struct flash_platform_data *plat = dev->dev.platform_data;
+	unsigned int size;
+	struct armflash_info *info;
+	int i, nr, err;
+
+	/* Count the number of devices */
+	for (nr = 0; ; nr++)
+		if (!platform_get_resource(dev, IORESOURCE_MEM, nr))
+			break;
+	if (nr == 0) {
+		err = -ENODEV;
+		goto out;
+	}
+
+	size = sizeof(struct armflash_info) +
+		sizeof(struct armflash_subdev_info) * nr;
+	info = kzalloc(size, GFP_KERNEL);
+	if (!info) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	if (plat && plat->init) {
+		err = plat->init();
+		if (err)
+			goto no_resource;
+	}
+
+	for (i = 0; i < nr; i++) {
+		struct armflash_subdev_info *subdev = &info->subdev[i];
+		struct resource *res;
+
+		res = platform_get_resource(dev, IORESOURCE_MEM, i);
+		if (!res)
+			break;
+
+		if (nr == 1)
+			/* No MTD concatenation, just use the default name */
+			snprintf(subdev->name, SUBDEV_NAME_SIZE, "%s",
+				 dev_name(&dev->dev));
+		else
+			snprintf(subdev->name, SUBDEV_NAME_SIZE, "%s-%d",
+				 dev_name(&dev->dev), i);
+		subdev->plat = plat;
+
+		err = armflash_subdev_probe(subdev, res);
+		if (err)
+			break;
+	}
+	info->nr_subdev = i;
+
+	if (err)
+		goto subdev_err;
+
+	if (info->nr_subdev == 1)
+		info->mtd = info->subdev[0].mtd;
+	else if (info->nr_subdev > 1) {
+#ifdef CONFIG_MTD_CONCAT
+		struct mtd_info *cdev[info->nr_subdev];
+
+		/*
+		 * We detected multiple devices.  Concatenate them together.
+		 */
+		for (i = 0; i < info->nr_subdev; i++)
+			cdev[i] = info->subdev[i].mtd;
+
+		info->mtd = mtd_concat_create(cdev, info->nr_subdev,
+					      dev_name(&dev->dev));
+		if (info->mtd == NULL)
+			err = -ENXIO;
+#else
+		printk(KERN_ERR "armflash: multiple devices found but "
+		       "MTD concat support disabled.\n");
+		err = -ENXIO;
+#endif
+	}
+
+	if (err < 0)
+		goto cleanup;
 
 	err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0);
 	if (err > 0) {
@@ -131,28 +227,30 @@ static int armflash_probe(struct platform_device *dev)
 			       "mtd partition registration failed: %d\n", err);
 	}
 
-	if (err == 0)
+	if (err == 0) {
 		platform_set_drvdata(dev, info);
+		return err;
+	}
 
 	/*
-	 * If we got an error, free all resources.
+	 * We got an error, free all resources.
 	 */
-	if (err < 0) {
+ cleanup:
 	if (info->mtd) {
 		del_mtd_partitions(info->mtd);
-			map_destroy(info->mtd);
+#ifdef CONFIG_MTD_CONCAT
+		if (info->mtd != info->subdev[0].mtd)
+			mtd_concat_destroy(info->mtd);
+#endif
 	}
 	kfree(info->parts);
-
- no_device:
-		iounmap(base);
- no_mem:
-		release_mem_region(res->start, size);
+ subdev_err:
+	for (i = info->nr_subdev - 1; i >= 0; i--)
+		armflash_subdev_remove(&info->subdev[i]);
  no_resource:
 	if (plat && plat->exit)
 		plat->exit();
 	kfree(info);
-	}
  out:
 	return err;
 }
@@ -160,22 +258,26 @@ static int armflash_probe(struct platform_device *dev)
 static int armflash_remove(struct platform_device *dev)
 {
 	struct armflash_info *info = platform_get_drvdata(dev);
+	struct flash_platform_data *plat = dev->dev.platform_data;
+	int i;
 
 	platform_set_drvdata(dev, NULL);
 
 	if (info) {
 		if (info->mtd) {
 			del_mtd_partitions(info->mtd);
-			map_destroy(info->mtd);
+#ifdef CONFIG_MTD_CONCAT
+			if (info->mtd != info->subdev[0].mtd)
+				mtd_concat_destroy(info->mtd);
+#endif
 		}
 		kfree(info->parts);
 
-		iounmap(info->map.virt);
-		release_resource(info->res);
-		kfree(info->res);
+		for (i = info->nr_subdev - 1; i >= 0; i--)
+			armflash_subdev_remove(&info->subdev[i]);
 
-		if (info->plat && info->plat->exit)
-			info->plat->exit();
+		if (plat && plat->exit)
+			plat->exit();
 
 		kfree(info);
 	}

drivers/mtd/maps/physmap.c

@@ -195,42 +195,6 @@ static int physmap_flash_probe(struct platform_device *dev)
 }
 
 #ifdef CONFIG_PM
-static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
-{
-	struct physmap_flash_info *info = platform_get_drvdata(dev);
-	int ret = 0;
-	int i;
-
-	for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
-		if (info->mtd[i]->suspend) {
-			ret = info->mtd[i]->suspend(info->mtd[i]);
-			if (ret)
-				goto fail;
-		}
-
-	return 0;
-fail:
-	for (--i; i >= 0; --i)
-		if (info->mtd[i]->suspend) {
-			BUG_ON(!info->mtd[i]->resume);
-			info->mtd[i]->resume(info->mtd[i]);
-		}
-
-	return ret;
-}
-
-static int physmap_flash_resume(struct platform_device *dev)
-{
-	struct physmap_flash_info *info = platform_get_drvdata(dev);
-	int i;
-
-	for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
-		if (info->mtd[i]->resume)
-			info->mtd[i]->resume(info->mtd[i]);
-
-	return 0;
-}
-
 static void physmap_flash_shutdown(struct platform_device *dev)
 {
 	struct physmap_flash_info *info = platform_get_drvdata(dev);
@@ -242,16 +206,12 @@ static void physmap_flash_shutdown(struct platform_device *dev)
 				info->mtd[i]->resume(info->mtd[i]);
 }
 #else
-#define physmap_flash_suspend NULL
-#define physmap_flash_resume NULL
 #define physmap_flash_shutdown NULL
 #endif
 
 static struct platform_driver physmap_flash_driver = {
 	.probe		= physmap_flash_probe,
 	.remove		= physmap_flash_remove,
-	.suspend	= physmap_flash_suspend,
-	.resume		= physmap_flash_resume,
 	.shutdown	= physmap_flash_shutdown,
 	.driver		= {
 		.name	= "physmap-flash",

drivers/mtd/maps/physmap_of.c

@@ -20,16 +20,23 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
+#include <linux/mtd/concat.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 
-struct of_flash {
+struct of_flash_list {
 	struct mtd_info *mtd;
 	struct map_info map;
 	struct resource *res;
+};
+
+struct of_flash {
+	struct mtd_info		*cmtd;
 #ifdef CONFIG_MTD_PARTITIONS
 	struct mtd_partition	*parts;
 #endif
+	int list_size; /* number of elements in of_flash_list */
+	struct of_flash_list	list[0];
 };
 
 #ifdef CONFIG_MTD_PARTITIONS
@@ -88,29 +95,43 @@ static int parse_obsolete_partitions(struct of_device *dev,
 static int of_flash_remove(struct of_device *dev)
 {
 	struct of_flash *info;
+	int i;
 
 	info = dev_get_drvdata(&dev->dev);
 	if (!info)
 		return 0;
 	dev_set_drvdata(&dev->dev, NULL);
 
-	if (info->mtd) {
+#ifdef CONFIG_MTD_CONCAT
+	if (info->cmtd != info->list[0].mtd) {
+		del_mtd_device(info->cmtd);
+		mtd_concat_destroy(info->cmtd);
+	}
+#endif
+
+	if (info->cmtd) {
 		if (OF_FLASH_PARTS(info)) {
-			del_mtd_partitions(info->mtd);
+			del_mtd_partitions(info->cmtd);
 			kfree(OF_FLASH_PARTS(info));
 		} else {
-			del_mtd_device(info->mtd);
+			del_mtd_device(info->cmtd);
 		}
-		map_destroy(info->mtd);
 	}
 
-	if (info->map.virt)
-		iounmap(info->map.virt);
+	for (i = 0; i < info->list_size; i++) {
+		if (info->list[i].mtd)
+			map_destroy(info->list[i].mtd);
+
+		if (info->list[i].map.virt)
+			iounmap(info->list[i].map.virt);
 
-	if (info->res) {
-		release_resource(info->res);
-		kfree(info->res);
+		if (info->list[i].res) {
+			release_resource(info->list[i].res);
+			kfree(info->list[i].res);
 		}
+	}
+
+	kfree(info);
 
 	return 0;
 }
@@ -164,67 +185,129 @@ static int __devinit of_flash_probe(struct of_device *dev,
 	const char *probe_type = match->data;
 	const u32 *width;
 	int err;
-
-	err = -ENXIO;
-	if (of_address_to_resource(dp, 0, &res)) {
-		dev_err(&dev->dev, "Can't get IO address from device tree\n");
+	int i;
+	int count;
+	const u32 *p;
+	int reg_tuple_size;
+	struct mtd_info **mtd_list = NULL;
+
+	reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32);
+
+	/*
+	 * Get number of "reg" tuples. Scan for MTD devices on area's
+	 * described by each "reg" region. This makes it possible (including
+	 * the concat support) to support the Intel P30 48F4400 chips which
+	 * consists internally of 2 non-identical NOR chips on one die.
+	 */
+	p = of_get_property(dp, "reg", &count);
+	if (count % reg_tuple_size != 0) {
+		dev_err(&dev->dev, "Malformed reg property on %s\n",
+				dev->node->full_name);
+		err = -EINVAL;
 		goto err_out;
 	}
-
-       	dev_dbg(&dev->dev, "of_flash device: %.8llx-%.8llx\n",
-		(unsigned long long)res.start, (unsigned long long)res.end);
+	count /= reg_tuple_size;
 
 	err = -ENOMEM;
-	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	info = kzalloc(sizeof(struct of_flash) +
+		       sizeof(struct of_flash_list) * count, GFP_KERNEL);
+	if (!info)
+		goto err_out;
+
+	mtd_list = kzalloc(sizeof(struct mtd_info) * count, GFP_KERNEL);
 	if (!info)
 		goto err_out;
 
 	dev_set_drvdata(&dev->dev, info);
 
+	for (i = 0; i < count; i++) {
+		err = -ENXIO;
+		if (of_address_to_resource(dp, i, &res)) {
+			dev_err(&dev->dev, "Can't get IO address from device"
+				" tree\n");
+			goto err_out;
+		}
+
+		dev_dbg(&dev->dev, "of_flash device: %.8llx-%.8llx\n",
+			(unsigned long long)res.start,
+			(unsigned long long)res.end);
+
 		err = -EBUSY;
-	info->res = request_mem_region(res.start, res.end - res.start + 1,
+		info->list[i].res = request_mem_region(res.start, res.end -
+						       res.start + 1,
 						       dev_name(&dev->dev));
-	if (!info->res)
+		if (!info->list[i].res)
 			goto err_out;
 
 		err = -ENXIO;
 		width = of_get_property(dp, "bank-width", NULL);
 		if (!width) {
-		dev_err(&dev->dev, "Can't get bank width from device tree\n");
+			dev_err(&dev->dev, "Can't get bank width from device"
+				" tree\n");
 			goto err_out;
 		}
 
-	info->map.name = dev_name(&dev->dev);
-	info->map.phys = res.start;
-	info->map.size = res.end - res.start + 1;
-	info->map.bankwidth = *width;
+		info->list[i].map.name = dev_name(&dev->dev);
+		info->list[i].map.phys = res.start;
+		info->list[i].map.size = res.end - res.start + 1;
+		info->list[i].map.bankwidth = *width;
 
 		err = -ENOMEM;
-	info->map.virt = ioremap(info->map.phys, info->map.size);
-	if (!info->map.virt) {
-		dev_err(&dev->dev, "Failed to ioremap() flash region\n");
+		info->list[i].map.virt = ioremap(info->list[i].map.phys,
+						 info->list[i].map.size);
+		if (!info->list[i].map.virt) {
+			dev_err(&dev->dev, "Failed to ioremap() flash"
+				" region\n");
 			goto err_out;
 		}
 
-	simple_map_init(&info->map);
+		simple_map_init(&info->list[i].map);
 
-	if (probe_type)
-		info->mtd = do_map_probe(probe_type, &info->map);
-	else
-		info->mtd = obsolete_probe(dev, &info->map);
+		if (probe_type) {
+			info->list[i].mtd = do_map_probe(probe_type,
+							 &info->list[i].map);
+		} else {
+			info->list[i].mtd = obsolete_probe(dev,
+							   &info->list[i].map);
+		}
+		mtd_list[i] = info->list[i].mtd;
 
 		err = -ENXIO;
-	if (!info->mtd) {
+		if (!info->list[i].mtd) {
 			dev_err(&dev->dev, "do_map_probe() failed\n");
 			goto err_out;
+		} else {
+			info->list_size++;
+		}
+		info->list[i].mtd->owner = THIS_MODULE;
+		info->list[i].mtd->dev.parent = &dev->dev;
 	}
-	info->mtd->owner = THIS_MODULE;
-	info->mtd->dev.parent = &dev->dev;
+
+	err = 0;
+	if (info->list_size == 1) {
+		info->cmtd = info->list[0].mtd;
+	} else if (info->list_size > 1) {
+		/*
+		 * We detected multiple devices. Concatenate them together.
+		 */
+#ifdef CONFIG_MTD_CONCAT
+		info->cmtd = mtd_concat_create(mtd_list, info->list_size,
+					       dev_name(&dev->dev));
+		if (info->cmtd == NULL)
+			err = -ENXIO;
+#else
+		printk(KERN_ERR "physmap_of: multiple devices "
+		       "found but MTD concat support disabled.\n");
+		err = -ENXIO;
+#endif
+	}
+	if (err)
+		goto err_out;
 
 #ifdef CONFIG_MTD_PARTITIONS
 	/* First look for RedBoot table or partitions on the command
 	 * line, these take precedence over device tree information */
-	err = parse_mtd_partitions(info->mtd, part_probe_types,
+	err = parse_mtd_partitions(info->cmtd, part_probe_types,
 				   &info->parts, 0);
 	if (err < 0)
 		return err;
@@ -244,15 +327,19 @@ static int __devinit of_flash_probe(struct of_device *dev,
 	}
 
 	if (err > 0)
-		add_mtd_partitions(info->mtd, info->parts, err);
+		add_mtd_partitions(info->cmtd, info->parts, err);
 	else
 #endif
-		add_mtd_device(info->mtd);
+		add_mtd_device(info->cmtd);
+
+	kfree(mtd_list);
 
 	return 0;
 
 err_out:
+	kfree(mtd_list);
 	of_flash_remove(dev);
+
 	return err;
 }
 

drivers/mtd/maps/pmcmsp-ramroot.c

-/*
- * Mapping of the rootfs in a physical region of memory
- *
- * Copyright (C) 2005-2007 PMC-Sierra Inc.
- * Author: Andrew Hughes, Andrew_Hughes@pmc-sierra.com
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the  License, or (at your
- *  option) any later version.
- *
- *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
- *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
- *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
- *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
- *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
- *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
- *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *  You should have received a copy of the  GNU General Public License along
- *  with this program; if not, write  to the Free Software Foundation, Inc.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/root_dev.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-
-#include <asm/io.h>
-
-#include <msp_prom.h>
-
-static struct mtd_info *rr_mtd;
-
-struct map_info rr_map = {
-	.name = "ramroot",
-	.bankwidth = 4,
-};
-
-static int __init init_rrmap(void)
-{
-	void *ramroot_start;
-	unsigned long ramroot_size;
-
-	/* Check for supported rootfs types */
-	if (get_ramroot(&ramroot_start, &ramroot_size)) {
-		rr_map.phys = CPHYSADDR(ramroot_start);
-		rr_map.size = ramroot_size;
-
-		printk(KERN_NOTICE
-			"PMC embedded root device: 0x%08lx @ 0x%08lx\n",
-			rr_map.size, (unsigned long)rr_map.phys);
-	} else {
-		printk(KERN_ERR
-			"init_rrmap: no supported embedded rootfs detected!\n");
-		return -ENXIO;
-	}
-
-	/* Map rootfs to I/O space for block device driver */
-	rr_map.virt = ioremap(rr_map.phys, rr_map.size);
-	if (!rr_map.virt) {
-		printk(KERN_ERR "Failed to ioremap\n");
-		return -EIO;
-	}
-
-	simple_map_init(&rr_map);
-
-	rr_mtd = do_map_probe("map_ram", &rr_map);
-	if (rr_mtd) {
-		rr_mtd->owner = THIS_MODULE;
-
-		add_mtd_device(rr_mtd);
-
-		return 0;
-	}
-
-	iounmap(rr_map.virt);
-	return -ENXIO;
-}
-
-static void __exit cleanup_rrmap(void)
-{
-	del_mtd_device(rr_mtd);
-	map_destroy(rr_mtd);
-
-	iounmap(rr_map.virt);
-	rr_map.virt = NULL;
-}
-
-MODULE_AUTHOR("PMC-Sierra, Inc");
-MODULE_DESCRIPTION("MTD map driver for embedded PMC-Sierra MSP filesystem");
-MODULE_LICENSE("GPL");
-
-module_init(init_rrmap);
-module_exit(cleanup_rrmap);

drivers/mtd/maps/pxa2xx-flash.c

@@ -140,24 +140,6 @@ static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
 }
 
 #ifdef CONFIG_PM
-static int pxa2xx_flash_suspend(struct platform_device *dev, pm_message_t state)
-{
-	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
-	int ret = 0;
-
-	if (info->mtd && info->mtd->suspend)
-		ret = info->mtd->suspend(info->mtd);
-	return ret;
-}
-
-static int pxa2xx_flash_resume(struct platform_device *dev)
-{
-	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
-
-	if (info->mtd && info->mtd->resume)
-		info->mtd->resume(info->mtd);
-	return 0;
-}
 static void pxa2xx_flash_shutdown(struct platform_device *dev)
 {
 	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
@@ -166,8 +148,6 @@ static void pxa2xx_flash_shutdown(struct platform_device *dev)
 		info->mtd->resume(info->mtd);
 }
 #else
-#define pxa2xx_flash_suspend NULL
-#define pxa2xx_flash_resume NULL
 #define pxa2xx_flash_shutdown NULL
 #endif
 
@@ -178,8 +158,6 @@ static struct platform_driver pxa2xx_flash_driver = {
 	},
 	.probe		= pxa2xx_flash_probe,
 	.remove		= __devexit_p(pxa2xx_flash_remove),
-	.suspend	= pxa2xx_flash_suspend,
-	.resume		= pxa2xx_flash_resume,
 	.shutdown	= pxa2xx_flash_shutdown,
 };
 

drivers/mtd/maps/rbtx4939-flash.c

@@ -145,25 +145,6 @@ static int rbtx4939_flash_probe(struct platform_device *dev)
 }
 
 #ifdef CONFIG_PM
-static int rbtx4939_flash_suspend(struct platform_device *dev,
-				  pm_message_t state)
-{
-	struct rbtx4939_flash_info *info = platform_get_drvdata(dev);
-
-	if (info->mtd->suspend)
-		return info->mtd->suspend(info->mtd);
-	return 0;
-}
-
-static int rbtx4939_flash_resume(struct platform_device *dev)
-{
-	struct rbtx4939_flash_info *info = platform_get_drvdata(dev);
-
-	if (info->mtd->resume)
-		info->mtd->resume(info->mtd);
-	return 0;
-}
-
 static void rbtx4939_flash_shutdown(struct platform_device *dev)
 {
 	struct rbtx4939_flash_info *info = platform_get_drvdata(dev);
@@ -173,16 +154,12 @@ static void rbtx4939_flash_shutdown(struct platform_device *dev)
 			info->mtd->resume(info->mtd);
 }
 #else
-#define rbtx4939_flash_suspend NULL
-#define rbtx4939_flash_resume NULL
 #define rbtx4939_flash_shutdown NULL
 #endif
 
 static struct platform_driver rbtx4939_flash_driver = {
 	.probe		= rbtx4939_flash_probe,
 	.remove		= rbtx4939_flash_remove,
-	.suspend	= rbtx4939_flash_suspend,
-	.resume		= rbtx4939_flash_resume,
 	.shutdown	= rbtx4939_flash_shutdown,
 	.driver		= {
 		.name	= "rbtx4939-flash",

drivers/mtd/maps/sa1100-flash.c

@@ -415,25 +415,6 @@ static int __exit sa1100_mtd_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM
-static int sa1100_mtd_suspend(struct platform_device *dev, pm_message_t state)
-{
-	struct sa_info *info = platform_get_drvdata(dev);
-	int ret = 0;
-
-	if (info)
-		ret = info->mtd->suspend(info->mtd);
-
-	return ret;
-}
-
-static int sa1100_mtd_resume(struct platform_device *dev)
-{
-	struct sa_info *info = platform_get_drvdata(dev);
-	if (info)
-		info->mtd->resume(info->mtd);
-	return 0;
-}
-
 static void sa1100_mtd_shutdown(struct platform_device *dev)
 {
 	struct sa_info *info = platform_get_drvdata(dev);
@@ -441,16 +422,12 @@ static void sa1100_mtd_shutdown(struct platform_device *dev)
 		info->mtd->resume(info->mtd);
 }
 #else
-#define sa1100_mtd_suspend NULL
-#define sa1100_mtd_resume  NULL
 #define sa1100_mtd_shutdown NULL
 #endif
 
 static struct platform_driver sa1100_mtd_driver = {
 	.probe		= sa1100_mtd_probe,
 	.remove		= __exit_p(sa1100_mtd_remove),
-	.suspend	= sa1100_mtd_suspend,
-	.resume		= sa1100_mtd_resume,
 	.shutdown	= sa1100_mtd_shutdown,
 	.driver		= {
 		.name	= "sa1100-mtd",

drivers/mtd/maps/uclinux.c

@@ -22,15 +22,19 @@
 
 /****************************************************************************/
 
+extern char _ebss;
+
 struct map_info uclinux_ram_map = {
 	.name = "RAM",
+	.phys = (unsigned long)&_ebss,
+	.size = 0,
 };
 
-struct mtd_info *uclinux_ram_mtdinfo;
+static struct mtd_info *uclinux_ram_mtdinfo;
 
 /****************************************************************************/
 
-struct mtd_partition uclinux_romfs[] = {
+static struct mtd_partition uclinux_romfs[] = {
 	{ .name = "ROMfs" }
 };
 
@@ -38,7 +42,7 @@ struct mtd_partition uclinux_romfs[] = {
 
 /****************************************************************************/
 
-int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
+static int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
 	size_t *retlen, void **virt, resource_size_t *phys)
 {
 	struct map_info *map = mtd->priv;
@@ -55,12 +59,10 @@ static int __init uclinux_mtd_init(void)
 {
 	struct mtd_info *mtd;
 	struct map_info *mapp;
-	extern char _ebss;
-	unsigned long addr = (unsigned long) &_ebss;
 
 	mapp = &uclinux_ram_map;
-	mapp->phys = addr;
-	mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(addr + 8))));
+	if (!mapp->size)
+		mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8))));
 	mapp->bankwidth = 4;
 
 	printk("uclinux[mtd]: RAM probe address=0x%x size=0x%x\n",

drivers/mtd/mtd_blkdevs.c

@@ -291,7 +291,7 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
 	gd->private_data = new;
 	new->blkcore_priv = gd;
 	gd->queue = tr->blkcore_priv->rq;
-	gd->driverfs_dev = new->mtd->dev.parent;
+	gd->driverfs_dev = &new->mtd->dev;
 
 	if (new->readonly)
 		set_disk_ro(gd, 1);

drivers/mtd/mtdchar.c

@@ -14,6 +14,7 @@
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
 #include <linux/backing-dev.h>
+#include <linux/compat.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/compatmac.h>
@@ -355,6 +356,100 @@ static int otp_select_filemode(struct mtd_file_info *mfi, int mode)
 # define otp_select_filemode(f,m)	-EOPNOTSUPP
 #endif
 
+static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd,
+	uint64_t start, uint32_t length, void __user *ptr,
+	uint32_t __user *retp)
+{
+	struct mtd_oob_ops ops;
+	uint32_t retlen;
+	int ret = 0;
+
+	if (!(file->f_mode & FMODE_WRITE))
+		return -EPERM;
+
+	if (length > 4096)
+		return -EINVAL;
+
+	if (!mtd->write_oob)
+		ret = -EOPNOTSUPP;
+	else
+		ret = access_ok(VERIFY_READ, ptr, length) ? 0 : EFAULT;
+
+	if (ret)
+		return ret;
+
+	ops.ooblen = length;
+	ops.ooboffs = start & (mtd->oobsize - 1);
+	ops.datbuf = NULL;
+	ops.mode = MTD_OOB_PLACE;
+
+	if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs))
+		return -EINVAL;
+
+	ops.oobbuf = kmalloc(length, GFP_KERNEL);
+	if (!ops.oobbuf)
+		return -ENOMEM;
+
+	if (copy_from_user(ops.oobbuf, ptr, length)) {
+		kfree(ops.oobbuf);
+		return -EFAULT;
+	}
+
+	start &= ~((uint64_t)mtd->oobsize - 1);
+	ret = mtd->write_oob(mtd, start, &ops);
+
+	if (ops.oobretlen > 0xFFFFFFFFU)
+		ret = -EOVERFLOW;
+	retlen = ops.oobretlen;
+	if (copy_to_user(retp, &retlen, sizeof(length)))
+		ret = -EFAULT;
+
+	kfree(ops.oobbuf);
+	return ret;
+}
+
+static int mtd_do_readoob(struct mtd_info *mtd, uint64_t start,
+	uint32_t length, void __user *ptr, uint32_t __user *retp)
+{
+	struct mtd_oob_ops ops;
+	int ret = 0;
+
+	if (length > 4096)
+		return -EINVAL;
+
+	if (!mtd->read_oob)
+		ret = -EOPNOTSUPP;
+	else
+		ret = access_ok(VERIFY_WRITE, ptr,
+				length) ? 0 : -EFAULT;
+	if (ret)
+		return ret;
+
+	ops.ooblen = length;
+	ops.ooboffs = start & (mtd->oobsize - 1);
+	ops.datbuf = NULL;
+	ops.mode = MTD_OOB_PLACE;
+
+	if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs))
+		return -EINVAL;
+
+	ops.oobbuf = kmalloc(length, GFP_KERNEL);
+	if (!ops.oobbuf)
+		return -ENOMEM;
+
+	start &= ~((uint64_t)mtd->oobsize - 1);
+	ret = mtd->read_oob(mtd, start, &ops);
+
+	if (put_user(ops.oobretlen, retp))
+		ret = -EFAULT;
+	else if (ops.oobretlen && copy_to_user(ptr, ops.oobbuf,
+					    ops.oobretlen))
+		ret = -EFAULT;
+
+	kfree(ops.oobbuf);
+	return ret;
+}
+
 static int mtd_ioctl(struct inode *inode, struct file *file,
 		     u_int cmd, u_long arg)
 {
@@ -417,6 +512,7 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
 		break;
 
 	case MEMERASE:
+	case MEMERASE64:
 	{
 		struct erase_info *erase;
 
@@ -427,20 +523,32 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
 		if (!erase)
 			ret = -ENOMEM;
 		else {
-			struct erase_info_user einfo;
-
 			wait_queue_head_t waitq;
 			DECLARE_WAITQUEUE(wait, current);
 
 			init_waitqueue_head(&waitq);
 
-			if (copy_from_user(&einfo, argp,
+			if (cmd == MEMERASE64) {
+				struct erase_info_user64 einfo64;
+
+				if (copy_from_user(&einfo64, argp,
+					    sizeof(struct erase_info_user64))) {
+					kfree(erase);
+					return -EFAULT;
+				}
+				erase->addr = einfo64.start;
+				erase->len = einfo64.length;
+			} else {
+				struct erase_info_user einfo32;
+
+				if (copy_from_user(&einfo32, argp,
 					    sizeof(struct erase_info_user))) {
 					kfree(erase);
 					return -EFAULT;
 				}
-			erase->addr = einfo.start;
-			erase->len = einfo.length;
+				erase->addr = einfo32.start;
+				erase->len = einfo32.length;
+			}
 			erase->mtd = mtd;
 			erase->callback = mtdchar_erase_callback;
 			erase->priv = (unsigned long)&waitq;
@@ -474,100 +582,56 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
 	case MEMWRITEOOB:
 	{
 		struct mtd_oob_buf buf;
-		struct mtd_oob_ops ops;
-		struct mtd_oob_buf __user *user_buf = argp;
-	        uint32_t retlen;
-
-		if(!(file->f_mode & FMODE_WRITE))
-			return -EPERM;
-
-		if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf)))
-			return -EFAULT;
-
-		if (buf.length > 4096)
-			return -EINVAL;
-
-		if (!mtd->write_oob)
-			ret = -EOPNOTSUPP;
-		else
-			ret = access_ok(VERIFY_READ, buf.ptr,
-					buf.length) ? 0 : EFAULT;
+		struct mtd_oob_buf __user *buf_user = argp;
 
-		if (ret)
-			return ret;
-
-		ops.ooblen = buf.length;
-		ops.ooboffs = buf.start & (mtd->oobsize - 1);
-		ops.datbuf = NULL;
-		ops.mode = MTD_OOB_PLACE;
-
-		if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs))
-			return -EINVAL;
-
-		ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
-		if (!ops.oobbuf)
-			return -ENOMEM;
-
-		if (copy_from_user(ops.oobbuf, buf.ptr, buf.length)) {
-			kfree(ops.oobbuf);
-			return -EFAULT;
-		}
-
-		buf.start &= ~(mtd->oobsize - 1);
-		ret = mtd->write_oob(mtd, buf.start, &ops);
-
-		if (ops.oobretlen > 0xFFFFFFFFU)
-			ret = -EOVERFLOW;
-		retlen = ops.oobretlen;
-		if (copy_to_user(&user_buf->length, &retlen, sizeof(buf.length)))
+		/* NOTE: writes return length to buf_user->length */
+		if (copy_from_user(&buf, argp, sizeof(buf)))
 			ret = -EFAULT;
-
-		kfree(ops.oobbuf);
+		else
+			ret = mtd_do_writeoob(file, mtd, buf.start, buf.length,
+				buf.ptr, &buf_user->length);
 		break;
-
 	}
 
 	case MEMREADOOB:
 	{
 		struct mtd_oob_buf buf;
-		struct mtd_oob_ops ops;
-
-		if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf)))
-			return -EFAULT;
-
-		if (buf.length > 4096)
-			return -EINVAL;
+		struct mtd_oob_buf __user *buf_user = argp;
 
-		if (!mtd->read_oob)
-			ret = -EOPNOTSUPP;
+		/* NOTE: writes return length to buf_user->start */
+		if (copy_from_user(&buf, argp, sizeof(buf)))
+			ret = -EFAULT;
 		else
-			ret = access_ok(VERIFY_WRITE, buf.ptr,
-					buf.length) ? 0 : -EFAULT;
-		if (ret)
-			return ret;
-
-		ops.ooblen = buf.length;
-		ops.ooboffs = buf.start & (mtd->oobsize - 1);
-		ops.datbuf = NULL;
-		ops.mode = MTD_OOB_PLACE;
+			ret = mtd_do_readoob(mtd, buf.start, buf.length,
+				buf.ptr, &buf_user->start);
+		break;
+	}
 
-		if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs))
-			return -EINVAL;
+	case MEMWRITEOOB64:
+	{
+		struct mtd_oob_buf64 buf;
+		struct mtd_oob_buf64 __user *buf_user = argp;
 
-		ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
-		if (!ops.oobbuf)
-			return -ENOMEM;
+		if (copy_from_user(&buf, argp, sizeof(buf)))
+			ret = -EFAULT;
+		else
+			ret = mtd_do_writeoob(file, mtd, buf.start, buf.length,
+				(void __user *)(uintptr_t)buf.usr_ptr,
+				&buf_user->length);
+		break;
+	}
 
-		buf.start &= ~(mtd->oobsize - 1);
-		ret = mtd->read_oob(mtd, buf.start, &ops);
+	case MEMREADOOB64:
+	{
+		struct mtd_oob_buf64 buf;
+		struct mtd_oob_buf64 __user *buf_user = argp;
 
-		if (put_user(ops.oobretlen, (uint32_t __user *)argp))
-			ret = -EFAULT;
-		else if (ops.oobretlen && copy_to_user(buf.ptr, ops.oobbuf,
-						    ops.oobretlen))
+		if (copy_from_user(&buf, argp, sizeof(buf)))
 			ret = -EFAULT;
-
-		kfree(ops.oobbuf);
+		else
+			ret = mtd_do_readoob(mtd, buf.start, buf.length,
+				(void __user *)(uintptr_t)buf.usr_ptr,
+				&buf_user->length);
 		break;
 	}
 
@@ -758,6 +822,68 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
 	return ret;
 } /* memory_ioctl */
 
+#ifdef CONFIG_COMPAT
+
+struct mtd_oob_buf32 {
+	u_int32_t start;
+	u_int32_t length;
+	compat_caddr_t ptr;	/* unsigned char* */
+};
+
+#define MEMWRITEOOB32		_IOWR('M', 3, struct mtd_oob_buf32)
+#define MEMREADOOB32		_IOWR('M', 4, struct mtd_oob_buf32)
+
+static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
+	unsigned long arg)
+{
+	struct inode *inode = file->f_path.dentry->d_inode;
+	struct mtd_file_info *mfi = file->private_data;
+	struct mtd_info *mtd = mfi->mtd;
+	void __user *argp = compat_ptr(arg);
+	int ret = 0;
+
+	lock_kernel();
+
+	switch (cmd) {
+	case MEMWRITEOOB32:
+	{
+		struct mtd_oob_buf32 buf;
+		struct mtd_oob_buf32 __user *buf_user = argp;
+
+		if (copy_from_user(&buf, argp, sizeof(buf)))
+			ret = -EFAULT;
+		else
+			ret = mtd_do_writeoob(file, mtd, buf.start,
+				buf.length, compat_ptr(buf.ptr),
+				&buf_user->length);
+		break;
+	}
+
+	case MEMREADOOB32:
+	{
+		struct mtd_oob_buf32 buf;
+		struct mtd_oob_buf32 __user *buf_user = argp;
+
+		/* NOTE: writes return length to buf->start */
+		if (copy_from_user(&buf, argp, sizeof(buf)))
+			ret = -EFAULT;
+		else
+			ret = mtd_do_readoob(mtd, buf.start,
+				buf.length, compat_ptr(buf.ptr),
+				&buf_user->start);
+		break;
+	}
+	default:
+		ret = mtd_ioctl(inode, file, cmd, (unsigned long)argp);
+	}
+
+	unlock_kernel();
+
+	return ret;
+}
+
+#endif /* CONFIG_COMPAT */
+
 /*
  * try to determine where a shared mapping can be made
  * - only supported for NOMMU at the moment (MMU can't doesn't copy private
@@ -817,6 +943,9 @@ static const struct file_operations mtd_fops = {
 	.read		= mtd_read,
 	.write		= mtd_write,
 	.ioctl		= mtd_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= mtd_compat_ioctl,
+#endif
 	.open		= mtd_open,
 	.release	= mtd_close,
 	.mmap		= mtd_mmap,

drivers/mtd/mtdcore.c

@@ -23,8 +23,15 @@
 
 #include "mtdcore.h"
 
+static int mtd_cls_suspend(struct device *dev, pm_message_t state);
+static int mtd_cls_resume(struct device *dev);
 
-static struct class *mtd_class;
+static struct class mtd_class = {
+	.name = "mtd",
+	.owner = THIS_MODULE,
+	.suspend = mtd_cls_suspend,
+	.resume = mtd_cls_resume,
+};
 
 /* These are exported solely for the purpose of mtd_blkdevs.c. You
    should not use them for _anything_ else */
@@ -52,7 +59,26 @@ static void mtd_release(struct device *dev)
 
 	/* remove /dev/mtdXro node if needed */
 	if (index)
-		device_destroy(mtd_class, index + 1);
+		device_destroy(&mtd_class, index + 1);
+}
+
+static int mtd_cls_suspend(struct device *dev, pm_message_t state)
+{
+	struct mtd_info *mtd = dev_to_mtd(dev);
+	
+	if (mtd->suspend)
+		return mtd->suspend(mtd);
+	else
+		return 0;
+}
+
+static int mtd_cls_resume(struct device *dev)
+{
+	struct mtd_info *mtd = dev_to_mtd(dev);
+	
+	if (mtd->resume)
+		mtd->resume(mtd);
+	return 0;
 }
 
 static ssize_t mtd_type_show(struct device *dev,
@@ -269,7 +295,7 @@ int add_mtd_device(struct mtd_info *mtd)
 			 * physical device.
 			 */
 			mtd->dev.type = &mtd_devtype;
-			mtd->dev.class = mtd_class;
+			mtd->dev.class = &mtd_class;
 			mtd->dev.devt = MTD_DEVT(i);
 			dev_set_name(&mtd->dev, "mtd%d", i);
 			if (device_register(&mtd->dev) != 0) {
@@ -278,7 +304,7 @@ int add_mtd_device(struct mtd_info *mtd)
 			}
 
 			if (MTD_DEVT(i))
-				device_create(mtd_class, mtd->dev.parent,
+				device_create(&mtd_class, mtd->dev.parent,
 						MTD_DEVT(i) + 1,
 						NULL, "mtd%dro", i);
 
@@ -604,11 +630,12 @@ static int mtd_read_proc (char *page, char **start, off_t off, int count,
 
 static int __init init_mtd(void)
 {
-	mtd_class = class_create(THIS_MODULE, "mtd");
+	int ret;
+	ret = class_register(&mtd_class);
 
-	if (IS_ERR(mtd_class)) {
-		pr_err("Error creating mtd class.\n");
-		return PTR_ERR(mtd_class);
+	if (ret) {
+		pr_err("Error registering mtd class: %d\n", ret);
+		return ret;
 	}
 #ifdef CONFIG_PROC_FS
 	if ((proc_mtd = create_proc_entry( "mtd", 0, NULL )))
@@ -623,7 +650,7 @@ static void __exit cleanup_mtd(void)
         if (proc_mtd)
 		remove_proc_entry( "mtd", NULL);
 #endif /* CONFIG_PROC_FS */
-	class_destroy(mtd_class);
+	class_unregister(&mtd_class);
 }
 
 module_init(init_mtd);

drivers/mtd/mtdpart.c

@@ -27,9 +27,7 @@ struct mtd_part {
 	struct mtd_info mtd;
 	struct mtd_info *master;
 	uint64_t offset;
-	int index;
 	struct list_head list;
-	int registered;
 };
 
 /*
@@ -321,7 +319,6 @@ int del_mtd_partitions(struct mtd_info *master)
 	list_for_each_entry_safe(slave, next, &mtd_partitions, list)
 		if (slave->master == master) {
 			list_del(&slave->list);
-			if (slave->registered)
 			del_mtd_device(&slave->mtd);
 			kfree(slave);
 		}
@@ -395,7 +392,7 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
 		slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
 	if (master->sync)
 		slave->mtd.sync = part_sync;
-	if (!partno && master->suspend && master->resume) {
+	if (!partno && !master->dev.class && master->suspend && master->resume) {
 			slave->mtd.suspend = part_suspend;
 			slave->mtd.resume = part_resume;
 	}
@@ -412,7 +409,6 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
 	slave->mtd.erase = part_erase;
 	slave->master = master;
 	slave->offset = part->offset;
-	slave->index = partno;
 
 	if (slave->offset == MTDPART_OFS_APPEND)
 		slave->offset = cur_offset;
@@ -500,15 +496,9 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
 	}
 
 out_register:
-	if (part->mtdp) {
-		/* store the object pointer (caller may or may not register it*/
-		*part->mtdp = &slave->mtd;
-		slave->registered = 0;
-	} else {
 	/* register our partition */
 	add_mtd_device(&slave->mtd);
-		slave->registered = 1;
-	}
+
 	return slave;
 }
 

drivers/mtd/nand/Kconfig

@@ -74,6 +74,12 @@ config MTD_NAND_AMS_DELTA
 	help
 	  Support for NAND flash on Amstrad E3 (Delta).
 
+config MTD_NAND_OMAP2
+	tristate "NAND Flash device on OMAP2 and OMAP3"
+	depends on ARM && MTD_NAND && (ARCH_OMAP2 || ARCH_OMAP3)
+	help
+          Support for NAND flash on Texas Instruments OMAP2 and OMAP3 platforms.
+
 config MTD_NAND_TS7250
 	tristate "NAND Flash device on TS-7250 board"
 	depends on MACH_TS72XX
@@ -139,27 +145,27 @@ config MTD_NAND_PPCHAMELEONEVB
 	  This enables the NAND flash driver on the PPChameleon EVB Board.
 
 config MTD_NAND_S3C2410
-	tristate "NAND Flash support for S3C2410/S3C2440 SoC"
-	depends on ARCH_S3C2410
+	tristate "NAND Flash support for Samsung S3C SoCs"
+	depends on ARCH_S3C2410 || ARCH_S3C64XX
 	help
-	  This enables the NAND flash controller on the S3C2410 and S3C2440
+	  This enables the NAND flash controller on the S3C24xx and S3C64xx
 	  SoCs
 
 	  No board specific support is done by this driver, each board
 	  must advertise a platform_device for the driver to attach.
 
 config MTD_NAND_S3C2410_DEBUG
-	bool "S3C2410 NAND driver debug"
+	bool "Samsung S3C NAND driver debug"
 	depends on MTD_NAND_S3C2410
 	help
-	  Enable debugging of the S3C2410 NAND driver
+	  Enable debugging of the S3C NAND driver
 
 config MTD_NAND_S3C2410_HWECC
-	bool "S3C2410 NAND Hardware ECC"
+	bool "Samsung S3C NAND Hardware ECC"
 	depends on MTD_NAND_S3C2410
 	help
-	  Enable the use of the S3C2410's internal ECC generator when
-	  using NAND. Early versions of the chip have had problems with
+	  Enable the use of the controller's internal ECC generator when
+	  using NAND. Early versions of the chips have had problems with
 	  incorrect ECC generation, and if using these, the default of
 	  software ECC is preferable.
 
@@ -171,7 +177,7 @@ config MTD_NAND_NDFC
 	 NDFC Nand Flash Controllers are integrated in IBM/AMCC's 4xx SoCs
 
 config MTD_NAND_S3C2410_CLKSTOP
-	bool "S3C2410 NAND IDLE clock stop"
+	bool "Samsung S3C NAND IDLE clock stop"
 	depends on MTD_NAND_S3C2410
 	default n
 	help

drivers/mtd/nand/Makefile

@@ -25,6 +25,7 @@ obj-$(CONFIG_MTD_NAND_CS553X)		+= cs553x_nand.o
 obj-$(CONFIG_MTD_NAND_NDFC)		+= ndfc.o
 obj-$(CONFIG_MTD_NAND_ATMEL)		+= atmel_nand.o
 obj-$(CONFIG_MTD_NAND_GPIO)		+= gpio.o
+obj-$(CONFIG_MTD_NAND_OMAP2) 		+= omap2.o
 obj-$(CONFIG_MTD_NAND_CM_X270)		+= cmx270_nand.o
 obj-$(CONFIG_MTD_NAND_BASLER_EXCITE)	+= excite_nandflash.o
 obj-$(CONFIG_MTD_NAND_PXA3xx)		+= pxa3xx_nand.o

drivers/mtd/nand/atmel_nand.c

@@ -24,6 +24,7 @@
 
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
@@ -47,6 +48,9 @@
 #define no_ecc		0
 #endif
 
+static int on_flash_bbt = 0;
+module_param(on_flash_bbt, int, 0);
+
 /* Register access macros */
 #define ecc_readl(add, reg)				\
 	__raw_readl(add + ATMEL_ECC_##reg)
@@ -459,12 +463,17 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
 
 	if (host->board->det_pin) {
 		if (gpio_get_value(host->board->det_pin)) {
-			printk("No SmartMedia card inserted.\n");
+			printk(KERN_INFO "No SmartMedia card inserted.\n");
 			res = ENXIO;
 			goto err_no_card;
 		}
 	}
 
+	if (on_flash_bbt) {
+		printk(KERN_INFO "atmel_nand: Use On Flash BBT\n");
+		nand_chip->options |= NAND_USE_FLASH_BBT;
+	}
+
 	/* first scan to find the device and get the page size */
 	if (nand_scan_ident(mtd, 1)) {
 		res = -ENXIO;

drivers/mtd/nand/bf5xx_nand.c

@@ -458,7 +458,7 @@ static irqreturn_t bf5xx_nand_dma_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int bf5xx_nand_dma_rw(struct mtd_info *mtd,
+static void bf5xx_nand_dma_rw(struct mtd_info *mtd,
 				uint8_t *buf, int is_read)
 {
 	struct bf5xx_nand_info *info = mtd_to_nand_info(mtd);
@@ -496,11 +496,20 @@ static int bf5xx_nand_dma_rw(struct mtd_info *mtd,
 	/* setup DMA register with Blackfin DMA API */
 	set_dma_config(CH_NFC, 0x0);
 	set_dma_start_addr(CH_NFC, (unsigned long) buf);
+
+/* The DMAs have different size on BF52x and BF54x */
+#ifdef CONFIG_BF52x
+	set_dma_x_count(CH_NFC, (page_size >> 1));
+	set_dma_x_modify(CH_NFC, 2);
+	val = DI_EN | WDSIZE_16;
+#endif
+
+#ifdef CONFIG_BF54x
 	set_dma_x_count(CH_NFC, (page_size >> 2));
 	set_dma_x_modify(CH_NFC, 4);
-
-	/* setup write or read operation */
 	val = DI_EN | WDSIZE_32;
+#endif
+	/* setup write or read operation */
 	if (is_read)
 		val |= WNR;
 	set_dma_config(CH_NFC, val);
@@ -512,8 +521,6 @@ static int bf5xx_nand_dma_rw(struct mtd_info *mtd,
 	else
 		bfin_write_NFC_PGCTL(0x2);
 	wait_for_completion(&info->dma_completion);
-
-	return 0;
 }
 
 static void bf5xx_nand_dma_read_buf(struct mtd_info *mtd,

drivers/mtd/nand/davinci_nand.c

@@ -44,7 +44,7 @@
  * and some flavors of secondary chipselect (e.g. based on A12) as used
  * with multichip packages.
  *
- * The 1-bit ECC hardware is supported, but not yet the newer 4-bit ECC
+ * The 1-bit ECC hardware is supported, as well as the newer 4-bit ECC
  * available on chips like the DM355 and OMAP-L137 and needed with the
  * more error-prone MLC NAND chips.
  *
@@ -54,11 +54,14 @@
 struct davinci_nand_info {
 	struct mtd_info		mtd;
 	struct nand_chip	chip;
+	struct nand_ecclayout	ecclayout;
 
 	struct device		*dev;
 	struct clk		*clk;
 	bool			partitioned;
 
+	bool			is_readmode;
+
 	void __iomem		*base;
 	void __iomem		*vaddr;
 
@@ -73,6 +76,7 @@ struct davinci_nand_info {
 };
 
 static DEFINE_SPINLOCK(davinci_nand_lock);
+static bool ecc4_busy;
 
 #define to_davinci_nand(m) container_of(m, struct davinci_nand_info, mtd)
 
@@ -217,6 +221,192 @@ static int nand_davinci_correct_1bit(struct mtd_info *mtd, u_char *dat,
 
 /*----------------------------------------------------------------------*/
 
+/*
+ * 4-bit hardware ECC ... context maintained over entire AEMIF
+ *
+ * This is a syndrome engine, but we avoid NAND_ECC_HW_SYNDROME
+ * since that forces use of a problematic "infix OOB" layout.
+ * Among other things, it trashes manufacturer bad block markers.
+ * Also, and specific to this hardware, it ECC-protects the "prepad"
+ * in the OOB ... while having ECC protection for parts of OOB would
+ * seem useful, the current MTD stack sometimes wants to update the
+ * OOB without recomputing ECC.
+ */
+
+static void nand_davinci_hwctl_4bit(struct mtd_info *mtd, int mode)
+{
+	struct davinci_nand_info *info = to_davinci_nand(mtd);
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&davinci_nand_lock, flags);
+
+	/* Start 4-bit ECC calculation for read/write */
+	val = davinci_nand_readl(info, NANDFCR_OFFSET);
+	val &= ~(0x03 << 4);
+	val |= (info->core_chipsel << 4) | BIT(12);
+	davinci_nand_writel(info, NANDFCR_OFFSET, val);
+
+	info->is_readmode = (mode == NAND_ECC_READ);
+
+	spin_unlock_irqrestore(&davinci_nand_lock, flags);
+}
+
+/* Read raw ECC code after writing to NAND. */
+static void
+nand_davinci_readecc_4bit(struct davinci_nand_info *info, u32 code[4])
+{
+	const u32 mask = 0x03ff03ff;
+
+	code[0] = davinci_nand_readl(info, NAND_4BIT_ECC1_OFFSET) & mask;
+	code[1] = davinci_nand_readl(info, NAND_4BIT_ECC2_OFFSET) & mask;
+	code[2] = davinci_nand_readl(info, NAND_4BIT_ECC3_OFFSET) & mask;
+	code[3] = davinci_nand_readl(info, NAND_4BIT_ECC4_OFFSET) & mask;
+}
+
+/* Terminate read ECC; or return ECC (as bytes) of data written to NAND. */
+static int nand_davinci_calculate_4bit(struct mtd_info *mtd,
+		const u_char *dat, u_char *ecc_code)
+{
+	struct davinci_nand_info *info = to_davinci_nand(mtd);
+	u32 raw_ecc[4], *p;
+	unsigned i;
+
+	/* After a read, terminate ECC calculation by a dummy read
+	 * of some 4-bit ECC register.  ECC covers everything that
+	 * was read; correct() just uses the hardware state, so
+	 * ecc_code is not needed.
+	 */
+	if (info->is_readmode) {
+		davinci_nand_readl(info, NAND_4BIT_ECC1_OFFSET);
+		return 0;
+	}
+
+	/* Pack eight raw 10-bit ecc values into ten bytes, making
+	 * two passes which each convert four values (in upper and
+	 * lower halves of two 32-bit words) into five bytes.  The
+	 * ROM boot loader uses this same packing scheme.
+	 */
+	nand_davinci_readecc_4bit(info, raw_ecc);
+	for (i = 0, p = raw_ecc; i < 2; i++, p += 2) {
+		*ecc_code++ =   p[0]        & 0xff;
+		*ecc_code++ = ((p[0] >>  8) & 0x03) | ((p[0] >> 14) & 0xfc);
+		*ecc_code++ = ((p[0] >> 22) & 0x0f) | ((p[1] <<  4) & 0xf0);
+		*ecc_code++ = ((p[1] >>  4) & 0x3f) | ((p[1] >> 10) & 0xc0);
+		*ecc_code++ =  (p[1] >> 18) & 0xff;
+	}
+
+	return 0;
+}
+
+/* Correct up to 4 bits in data we just read, using state left in the
+ * hardware plus the ecc_code computed when it was first written.
+ */
+static int nand_davinci_correct_4bit(struct mtd_info *mtd,
+		u_char *data, u_char *ecc_code, u_char *null)
+{
+	int i;
+	struct davinci_nand_info *info = to_davinci_nand(mtd);
+	unsigned short ecc10[8];
+	unsigned short *ecc16;
+	u32 syndrome[4];
+	unsigned num_errors, corrected;
+
+	/* All bytes 0xff?  It's an erased page; ignore its ECC. */
+	for (i = 0; i < 10; i++) {
+		if (ecc_code[i] != 0xff)
+			goto compare;
+	}
+	return 0;
+
+compare:
+	/* Unpack ten bytes into eight 10 bit values.  We know we're
+	 * little-endian, and use type punning for less shifting/masking.
+	 */
+	if (WARN_ON(0x01 & (unsigned) ecc_code))
+		return -EINVAL;
+	ecc16 = (unsigned short *)ecc_code;
+
+	ecc10[0] =  (ecc16[0] >>  0) & 0x3ff;
+	ecc10[1] = ((ecc16[0] >> 10) & 0x3f) | ((ecc16[1] << 6) & 0x3c0);
+	ecc10[2] =  (ecc16[1] >>  4) & 0x3ff;
+	ecc10[3] = ((ecc16[1] >> 14) & 0x3)  | ((ecc16[2] << 2) & 0x3fc);
+	ecc10[4] =  (ecc16[2] >>  8)         | ((ecc16[3] << 8) & 0x300);
+	ecc10[5] =  (ecc16[3] >>  2) & 0x3ff;
+	ecc10[6] = ((ecc16[3] >> 12) & 0xf)  | ((ecc16[4] << 4) & 0x3f0);
+	ecc10[7] =  (ecc16[4] >>  6) & 0x3ff;
+
+	/* Tell ECC controller about the expected ECC codes. */
+	for (i = 7; i >= 0; i--)
+		davinci_nand_writel(info, NAND_4BIT_ECC_LOAD_OFFSET, ecc10[i]);
+
+	/* Allow time for syndrome calculation ... then read it.
+	 * A syndrome of all zeroes 0 means no detected errors.
+	 */
+	davinci_nand_readl(info, NANDFSR_OFFSET);
+	nand_davinci_readecc_4bit(info, syndrome);
+	if (!(syndrome[0] | syndrome[1] | syndrome[2] | syndrome[3]))
+		return 0;
+
+	/* Start address calculation, and wait for it to complete.
+	 * We _could_ start reading more data while this is working,
+	 * to speed up the overall page read.
+	 */
+	davinci_nand_writel(info, NANDFCR_OFFSET,
+			davinci_nand_readl(info, NANDFCR_OFFSET) | BIT(13));
+	for (;;) {
+		u32	fsr = davinci_nand_readl(info, NANDFSR_OFFSET);
+
+		switch ((fsr >> 8) & 0x0f) {
+		case 0:		/* no error, should not happen */
+			return 0;
+		case 1:		/* five or more errors detected */
+			return -EIO;
+		case 2:		/* error addresses computed */
+		case 3:
+			num_errors = 1 + ((fsr >> 16) & 0x03);
+			goto correct;
+		default:	/* still working on it */
+			cpu_relax();
+			continue;
+		}
+	}
+
+correct:
+	/* correct each error */
+	for (i = 0, corrected = 0; i < num_errors; i++) {
+		int error_address, error_value;
+
+		if (i > 1) {
+			error_address = davinci_nand_readl(info,
+						NAND_ERR_ADD2_OFFSET);
+			error_value = davinci_nand_readl(info,
+						NAND_ERR_ERRVAL2_OFFSET);
+		} else {
+			error_address = davinci_nand_readl(info,
+						NAND_ERR_ADD1_OFFSET);
+			error_value = davinci_nand_readl(info,
+						NAND_ERR_ERRVAL1_OFFSET);
+		}
+
+		if (i & 1) {
+			error_address >>= 16;
+			error_value >>= 16;
+		}
+		error_address &= 0x3ff;
+		error_address = (512 + 7) - error_address;
+
+		if (error_address < 512) {
+			data[error_address] ^= error_value;
+			corrected++;
+		}
+	}
+
+	return corrected;
+}
+
+/*----------------------------------------------------------------------*/
+
 /*
  * NOTE:  NAND boot requires ALE == EM_A[1], CLE == EM_A[2], so that's
  * how these chips are normally wired.  This translates to both 8 and 16
@@ -294,6 +484,23 @@ static void __init nand_dm6446evm_flash_init(struct davinci_nand_info *info)
 
 /*----------------------------------------------------------------------*/
 
+/* An ECC layout for using 4-bit ECC with small-page flash, storing
+ * ten ECC bytes plus the manufacturer's bad block marker byte, and
+ * and not overlapping the default BBT markers.
+ */
+static struct nand_ecclayout hwecc4_small __initconst = {
+	.eccbytes = 10,
+	.eccpos = { 0, 1, 2, 3, 4,
+		/* offset 5 holds the badblock marker */
+		6, 7,
+		13, 14, 15, },
+	.oobfree = {
+		{.offset = 8, .length = 5, },
+		{.offset = 16, },
+	},
+};
+
+
 static int __init nand_davinci_probe(struct platform_device *pdev)
 {
 	struct davinci_nand_pdata	*pdata = pdev->dev.platform_data;
@@ -306,6 +513,10 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	uint32_t			val;
 	nand_ecc_modes_t		ecc_mode;
 
+	/* insist on board-specific configuration */
+	if (!pdata)
+		return -ENODEV;
+
 	/* which external chipselect will we be managing? */
 	if (pdev->id < 0 || pdev->id > 3)
 		return -ENODEV;
@@ -351,7 +562,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	info->chip.select_chip	= nand_davinci_select_chip;
 
 	/* options such as NAND_USE_FLASH_BBT or 16-bit widths */
-	info->chip.options	= pdata ? pdata->options : 0;
+	info->chip.options	= pdata->options;
 
 	info->ioaddr		= (uint32_t __force) vaddr;
 
@@ -360,14 +571,8 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	info->mask_chipsel	= pdata->mask_chipsel;
 
 	/* use nandboot-capable ALE/CLE masks by default */
-	if (pdata && pdata->mask_ale)
-		info->mask_ale	= pdata->mask_cle;
-	else
-		info->mask_ale	= MASK_ALE;
-	if (pdata && pdata->mask_cle)
-		info->mask_cle	= pdata->mask_cle;
-	else
-		info->mask_cle	= MASK_CLE;
+	info->mask_ale		= pdata->mask_cle ? : MASK_ALE;
+	info->mask_cle		= pdata->mask_cle ? : MASK_CLE;
 
 	/* Set address of hardware control function */
 	info->chip.cmd_ctrl	= nand_davinci_hwcontrol;
@@ -377,30 +582,44 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	info->chip.read_buf     = nand_davinci_read_buf;
 	info->chip.write_buf    = nand_davinci_write_buf;
 
-	/* use board-specific ECC config; else, the best available */
-	if (pdata)
+	/* Use board-specific ECC config */
 	ecc_mode		= pdata->ecc_mode;
-	else
-		ecc_mode = NAND_ECC_HW;
 
+	ret = -EINVAL;
 	switch (ecc_mode) {
 	case NAND_ECC_NONE:
 	case NAND_ECC_SOFT:
+		pdata->ecc_bits = 0;
 		break;
 	case NAND_ECC_HW:
+		if (pdata->ecc_bits == 4) {
+			/* No sanity checks:  CPUs must support this,
+			 * and the chips may not use NAND_BUSWIDTH_16.
+			 */
+
+			/* No sharing 4-bit hardware between chipselects yet */
+			spin_lock_irq(&davinci_nand_lock);
+			if (ecc4_busy)
+				ret = -EBUSY;
+			else
+				ecc4_busy = true;
+			spin_unlock_irq(&davinci_nand_lock);
+
+			if (ret == -EBUSY)
+				goto err_ecc;
+
+			info->chip.ecc.calculate = nand_davinci_calculate_4bit;
+			info->chip.ecc.correct = nand_davinci_correct_4bit;
+			info->chip.ecc.hwctl = nand_davinci_hwctl_4bit;
+			info->chip.ecc.bytes = 10;
+		} else {
 			info->chip.ecc.calculate = nand_davinci_calculate_1bit;
 			info->chip.ecc.correct = nand_davinci_correct_1bit;
 			info->chip.ecc.hwctl = nand_davinci_hwctl_1bit;
-		info->chip.ecc.size = 512;
 			info->chip.ecc.bytes = 3;
-		break;
-	case NAND_ECC_HW_SYNDROME:
-		/* FIXME implement */
+		}
 		info->chip.ecc.size = 512;
-		info->chip.ecc.bytes = 10;
-
-		dev_warn(&pdev->dev, "4-bit ECC nyet supported\n");
-		/* FALL THROUGH */
+		break;
 	default:
 		ret = -EINVAL;
 		goto err_ecc;
@@ -441,12 +660,56 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 	spin_unlock_irq(&davinci_nand_lock);
 
 	/* Scan to find existence of the device(s) */
-	ret = nand_scan(&info->mtd, pdata->mask_chipsel ? 2 : 1);
+	ret = nand_scan_ident(&info->mtd, pdata->mask_chipsel ? 2 : 1);
 	if (ret < 0) {
 		dev_dbg(&pdev->dev, "no NAND chip(s) found\n");
 		goto err_scan;
 	}
 
+	/* Update ECC layout if needed ... for 1-bit HW ECC, the default
+	 * is OK, but it allocates 6 bytes when only 3 are needed (for
+	 * each 512 bytes).  For the 4-bit HW ECC, that default is not
+	 * usable:  10 bytes are needed, not 6.
+	 */
+	if (pdata->ecc_bits == 4) {
+		int	chunks = info->mtd.writesize / 512;
+
+		if (!chunks || info->mtd.oobsize < 16) {
+			dev_dbg(&pdev->dev, "too small\n");
+			ret = -EINVAL;
+			goto err_scan;
+		}
+
+		/* For small page chips, preserve the manufacturer's
+		 * badblock marking data ... and make sure a flash BBT
+		 * table marker fits in the free bytes.
+		 */
+		if (chunks == 1) {
+			info->ecclayout = hwecc4_small;
+			info->ecclayout.oobfree[1].length =
+				info->mtd.oobsize - 16;
+			goto syndrome_done;
+		}
+
+		/* For large page chips we'll be wanting to use a
+		 * not-yet-implemented mode that reads OOB data
+		 * before reading the body of the page, to avoid
+		 * the "infix OOB" model of NAND_ECC_HW_SYNDROME
+		 * (and preserve manufacturer badblock markings).
+		 */
+		dev_warn(&pdev->dev, "no 4-bit ECC support yet "
+				"for large page NAND\n");
+		ret = -EIO;
+		goto err_scan;
+
+syndrome_done:
+		info->chip.ecc.layout = &info->ecclayout;
+	}
+
+	ret = nand_scan_tail(&info->mtd);
+	if (ret < 0)
+		goto err_scan;
+
 	if (mtd_has_partitions()) {
 		struct mtd_partition	*mtd_parts = NULL;
 		int			mtd_parts_nb = 0;
@@ -455,22 +718,11 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 			static const char *probes[] __initconst =
 				{ "cmdlinepart", NULL };
 
-			const char		*master_name;
-
-			/* Set info->mtd.name = 0 temporarily */
-			master_name		= info->mtd.name;
-			info->mtd.name		= (char *)0;
-
-			/* info->mtd.name == 0, means: don't bother checking
-			   <mtd-id> */
 			mtd_parts_nb = parse_mtd_partitions(&info->mtd, probes,
 							    &mtd_parts, 0);
-
-			/* Restore info->mtd.name */
-			info->mtd.name = master_name;
 		}
 
-		if (mtd_parts_nb <= 0 && pdata) {
+		if (mtd_parts_nb <= 0) {
 			mtd_parts = pdata->parts;
 			mtd_parts_nb = pdata->nr_parts;
 		}
@@ -483,7 +735,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 				info->partitioned = true;
 		}
 
-	} else if (pdata && pdata->nr_parts) {
+	} else if (pdata->nr_parts) {
 		dev_warn(&pdev->dev, "ignoring %d default partitions on %s\n",
 				pdata->nr_parts, info->mtd.name);
 	}
@@ -509,6 +761,11 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
 err_clk_enable:
 	clk_put(info->clk);
 
+	spin_lock_irq(&davinci_nand_lock);
+	if (ecc_mode == NAND_ECC_HW_SYNDROME)
+		ecc4_busy = false;
+	spin_unlock_irq(&davinci_nand_lock);
+
 err_ecc:
 err_clk:
 err_ioremap:
@@ -532,6 +789,11 @@ static int __exit nand_davinci_remove(struct platform_device *pdev)
 	else
 		status = del_mtd_device(&info->mtd);
 
+	spin_lock_irq(&davinci_nand_lock);
+	if (info->chip.ecc.mode == NAND_ECC_HW_SYNDROME)
+		ecc4_busy = false;
+	spin_unlock_irq(&davinci_nand_lock);
+
 	iounmap(info->base);
 	iounmap(info->vaddr);
 

drivers/mtd/nand/mxc_nand.c

@@ -138,7 +138,14 @@ static struct nand_ecclayout nand_hw_eccoob_8 = {
 static struct nand_ecclayout nand_hw_eccoob_16 = {
 	.eccbytes = 5,
 	.eccpos = {6, 7, 8, 9, 10},
-	.oobfree = {{0, 6}, {12, 4}, }
+	.oobfree = {{0, 5}, {11, 5}, }
+};
+
+static struct nand_ecclayout nand_hw_eccoob_64 = {
+	.eccbytes = 20,
+	.eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
+		   38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
+	.oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
 };
 
 #ifdef CONFIG_MTD_PARTITIONS
@@ -192,7 +199,7 @@ static void wait_op_done(struct mxc_nand_host *host, int max_retries,
 			}
 			udelay(1);
 		}
-		if (max_retries <= 0)
+		if (max_retries < 0)
 			DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n",
 			      __func__, param);
 	}
@@ -795,9 +802,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		send_addr(host, (page_addr & 0xff), false);
 
 		if (host->pagesize_2k) {
-			send_addr(host, (page_addr >> 8) & 0xFF, false);
-			if (mtd->size >= 0x40000000)
+			if (mtd->size >= 0x10000000) {
+				/* paddr_8 - paddr_15 */
+				send_addr(host, (page_addr >> 8) & 0xff, false);
 				send_addr(host, (page_addr >> 16) & 0xff, true);
+			} else
+				/* paddr_8 - paddr_15 */
+				send_addr(host, (page_addr >> 8) & 0xff, true);
 		} else {
 			/* One more address cycle for higher density devices */
 			if (mtd->size >= 0x4000000) {
@@ -923,7 +934,6 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		this->ecc.mode = NAND_ECC_HW;
 		this->ecc.size = 512;
 		this->ecc.bytes = 3;
-		this->ecc.layout = &nand_hw_eccoob_8;
 		tmp = readw(host->regs + NFC_CONFIG1);
 		tmp |= NFC_ECC_EN;
 		writew(tmp, host->regs + NFC_CONFIG1);
@@ -957,12 +967,44 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		this->ecc.layout = &nand_hw_eccoob_16;
 	}
 
-	host->pagesize_2k = 0;
+	/* first scan to find the device and get the page size */
+	if (nand_scan_ident(mtd, 1)) {
+		err = -ENXIO;
+		goto escan;
+	}
+
+	host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
 
-	/* Scan to find existence of the device */
-	if (nand_scan(mtd, 1)) {
-		DEBUG(MTD_DEBUG_LEVEL0,
-		      "MXC_ND: Unable to find any NAND device.\n");
+	if (this->ecc.mode == NAND_ECC_HW) {
+		switch (mtd->oobsize) {
+		case 8:
+			this->ecc.layout = &nand_hw_eccoob_8;
+			break;
+		case 16:
+			this->ecc.layout = &nand_hw_eccoob_16;
+			break;
+		case 64:
+			this->ecc.layout = &nand_hw_eccoob_64;
+			break;
+		default:
+			/* page size not handled by HW ECC */
+			/* switching back to soft ECC */
+			this->ecc.size = 512;
+			this->ecc.bytes = 3;
+			this->ecc.layout = &nand_hw_eccoob_8;
+			this->ecc.mode = NAND_ECC_SOFT;
+			this->ecc.calculate = NULL;
+			this->ecc.correct = NULL;
+			this->ecc.hwctl = NULL;
+			tmp = readw(host->regs + NFC_CONFIG1);
+			tmp &= ~NFC_ECC_EN;
+			writew(tmp, host->regs + NFC_CONFIG1);
+			break;
+		}
+	}
+
+	/* second phase scan */
+	if (nand_scan_tail(mtd)) {
 		err = -ENXIO;
 		goto escan;
 	}
@@ -985,7 +1027,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 	return 0;
 
 escan:
-	free_irq(host->irq, NULL);
+	free_irq(host->irq, host);
 eirq:
 	iounmap(host->regs);
 eres:
@@ -1005,7 +1047,7 @@ static int __devexit mxcnd_remove(struct platform_device *pdev)
 	platform_set_drvdata(pdev, NULL);
 
 	nand_release(&host->mtd);
-	free_irq(host->irq, NULL);
+	free_irq(host->irq, host);
 	iounmap(host->regs);
 	kfree(host);
 

drivers/mtd/nand/nand_base.c

@@ -2756,7 +2756,8 @@ int nand_scan_tail(struct mtd_info *mtd)
 	 * the out of band area
 	 */
 	chip->ecc.layout->oobavail = 0;
-	for (i = 0; chip->ecc.layout->oobfree[i].length; i++)
+	for (i = 0; chip->ecc.layout->oobfree[i].length
+			&& i < ARRAY_SIZE(chip->ecc.layout->oobfree); i++)
 		chip->ecc.layout->oobavail +=
 			chip->ecc.layout->oobfree[i].length;
 	mtd->oobavail = chip->ecc.layout->oobavail;

drivers/mtd/nand/nand_ecc.c

@@ -428,8 +428,8 @@ EXPORT_SYMBOL(nand_calculate_ecc);
 int nand_correct_data(struct mtd_info *mtd, unsigned char *buf,
 		      unsigned char *read_ecc, unsigned char *calc_ecc)
 {
-	unsigned char b0, b1, b2;
-	unsigned char byte_addr, bit_addr;
+	unsigned char b0, b1, b2, bit_addr;
+	unsigned int byte_addr;
 	/* 256 or 512 bytes/ecc  */
 	const uint32_t eccsize_mult =
 			(((struct nand_chip *)mtd->priv)->ecc.size) >> 8;

drivers/mtd/nand/omap2.c

+/*
+ * Copyright © 2004 Texas Instruments, Jian Zhang <jzhang@ti.com>
+ * Copyright © 2004 Micron Technology Inc.
+ * Copyright © 2004 David Brownell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/io.h>
+
+#include <asm/dma.h>
+
+#include <mach/gpmc.h>
+#include <mach/nand.h>
+
+#define GPMC_IRQ_STATUS		0x18
+#define GPMC_ECC_CONFIG		0x1F4
+#define GPMC_ECC_CONTROL	0x1F8
+#define GPMC_ECC_SIZE_CONFIG	0x1FC
+#define GPMC_ECC1_RESULT	0x200
+
+#define	DRIVER_NAME	"omap2-nand"
+
+/* size (4 KiB) for IO mapping */
+#define	NAND_IO_SIZE	SZ_4K
+
+#define	NAND_WP_OFF	0
+#define NAND_WP_BIT	0x00000010
+#define WR_RD_PIN_MONITORING	0x00600000
+
+#define	GPMC_BUF_FULL	0x00000001
+#define	GPMC_BUF_EMPTY	0x00000000
+
+#define NAND_Ecc_P1e		(1 << 0)
+#define NAND_Ecc_P2e		(1 << 1)
+#define NAND_Ecc_P4e		(1 << 2)
+#define NAND_Ecc_P8e		(1 << 3)
+#define NAND_Ecc_P16e		(1 << 4)
+#define NAND_Ecc_P32e		(1 << 5)
+#define NAND_Ecc_P64e		(1 << 6)
+#define NAND_Ecc_P128e		(1 << 7)
+#define NAND_Ecc_P256e		(1 << 8)
+#define NAND_Ecc_P512e		(1 << 9)
+#define NAND_Ecc_P1024e		(1 << 10)
+#define NAND_Ecc_P2048e		(1 << 11)
+
+#define NAND_Ecc_P1o		(1 << 16)
+#define NAND_Ecc_P2o		(1 << 17)
+#define NAND_Ecc_P4o		(1 << 18)
+#define NAND_Ecc_P8o		(1 << 19)
+#define NAND_Ecc_P16o		(1 << 20)
+#define NAND_Ecc_P32o		(1 << 21)
+#define NAND_Ecc_P64o		(1 << 22)
+#define NAND_Ecc_P128o		(1 << 23)
+#define NAND_Ecc_P256o		(1 << 24)
+#define NAND_Ecc_P512o		(1 << 25)
+#define NAND_Ecc_P1024o		(1 << 26)
+#define NAND_Ecc_P2048o		(1 << 27)
+
+#define TF(value)	(value ? 1 : 0)
+
+#define P2048e(a)	(TF(a & NAND_Ecc_P2048e)	<< 0)
+#define P2048o(a)	(TF(a & NAND_Ecc_P2048o)	<< 1)
+#define P1e(a)		(TF(a & NAND_Ecc_P1e)		<< 2)
+#define P1o(a)		(TF(a & NAND_Ecc_P1o)		<< 3)
+#define P2e(a)		(TF(a & NAND_Ecc_P2e)		<< 4)
+#define P2o(a)		(TF(a & NAND_Ecc_P2o)		<< 5)
+#define P4e(a)		(TF(a & NAND_Ecc_P4e)		<< 6)
+#define P4o(a)		(TF(a & NAND_Ecc_P4o)		<< 7)
+
+#define P8e(a)		(TF(a & NAND_Ecc_P8e)		<< 0)
+#define P8o(a)		(TF(a & NAND_Ecc_P8o)		<< 1)
+#define P16e(a)		(TF(a & NAND_Ecc_P16e)		<< 2)
+#define P16o(a)		(TF(a & NAND_Ecc_P16o)		<< 3)
+#define P32e(a)		(TF(a & NAND_Ecc_P32e)		<< 4)
+#define P32o(a)		(TF(a & NAND_Ecc_P32o)		<< 5)
+#define P64e(a)		(TF(a & NAND_Ecc_P64e)		<< 6)
+#define P64o(a)		(TF(a & NAND_Ecc_P64o)		<< 7)
+
+#define P128e(a)	(TF(a & NAND_Ecc_P128e)		<< 0)
+#define P128o(a)	(TF(a & NAND_Ecc_P128o)		<< 1)
+#define P256e(a)	(TF(a & NAND_Ecc_P256e)		<< 2)
+#define P256o(a)	(TF(a & NAND_Ecc_P256o)		<< 3)
+#define P512e(a)	(TF(a & NAND_Ecc_P512e)		<< 4)
+#define P512o(a)	(TF(a & NAND_Ecc_P512o)		<< 5)
+#define P1024e(a)	(TF(a & NAND_Ecc_P1024e)	<< 6)
+#define P1024o(a)	(TF(a & NAND_Ecc_P1024o)	<< 7)
+
+#define P8e_s(a)	(TF(a & NAND_Ecc_P8e)		<< 0)
+#define P8o_s(a)	(TF(a & NAND_Ecc_P8o)		<< 1)
+#define P16e_s(a)	(TF(a & NAND_Ecc_P16e)		<< 2)
+#define P16o_s(a)	(TF(a & NAND_Ecc_P16o)		<< 3)
+#define P1e_s(a)	(TF(a & NAND_Ecc_P1e)		<< 4)
+#define P1o_s(a)	(TF(a & NAND_Ecc_P1o)		<< 5)
+#define P2e_s(a)	(TF(a & NAND_Ecc_P2e)		<< 6)
+#define P2o_s(a)	(TF(a & NAND_Ecc_P2o)		<< 7)
+
+#define P4e_s(a)	(TF(a & NAND_Ecc_P4e)		<< 0)
+#define P4o_s(a)	(TF(a & NAND_Ecc_P4o)		<< 1)
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
+struct omap_nand_info {
+	struct nand_hw_control		controller;
+	struct omap_nand_platform_data	*pdata;
+	struct mtd_info			mtd;
+	struct mtd_partition		*parts;
+	struct nand_chip		nand;
+	struct platform_device		*pdev;
+
+	int				gpmc_cs;
+	unsigned long			phys_base;
+	void __iomem			*gpmc_cs_baseaddr;
+	void __iomem			*gpmc_baseaddr;
+};
+
+/**
+ * omap_nand_wp - This function enable or disable the Write Protect feature
+ * @mtd: MTD device structure
+ * @mode: WP ON/OFF
+ */
+static void omap_nand_wp(struct mtd_info *mtd, int mode)
+{
+	struct omap_nand_info *info = container_of(mtd,
+						struct omap_nand_info, mtd);
+
+	unsigned long config = __raw_readl(info->gpmc_baseaddr + GPMC_CONFIG);
+
+	if (mode)
+		config &= ~(NAND_WP_BIT);	/* WP is ON */
+	else
+		config |= (NAND_WP_BIT);	/* WP is OFF */
+
+	__raw_writel(config, (info->gpmc_baseaddr + GPMC_CONFIG));
+}
+
+/**
+ * omap_hwcontrol - hardware specific access to control-lines
+ * @mtd: MTD device structure
+ * @cmd: command to device
+ * @ctrl:
+ * NAND_NCE: bit 0 -> don't care
+ * NAND_CLE: bit 1 -> Command Latch
+ * NAND_ALE: bit 2 -> Address Latch
+ *
+ * NOTE: boards may use different bits for these!!
+ */
+static void omap_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+	struct omap_nand_info *info = container_of(mtd,
+					struct omap_nand_info, mtd);
+	switch (ctrl) {
+	case NAND_CTRL_CHANGE | NAND_CTRL_CLE:
+		info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_COMMAND;
+		info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_DATA;
+		break;
+
+	case NAND_CTRL_CHANGE | NAND_CTRL_ALE:
+		info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_ADDRESS;
+		info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_DATA;
+		break;
+
+	case NAND_CTRL_CHANGE | NAND_NCE:
+		info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_DATA;
+		info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_DATA;
+		break;
+	}
+
+	if (cmd != NAND_CMD_NONE)
+		__raw_writeb(cmd, info->nand.IO_ADDR_W);
+}
+
+/**
+ * omap_read_buf16 - read data from NAND controller into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ */
+static void omap_read_buf16(struct mtd_info *mtd, u_char *buf, int len)
+{
+	struct nand_chip *nand = mtd->priv;
+
+	__raw_readsw(nand->IO_ADDR_R, buf, len / 2);
+}
+
+/**
+ * omap_write_buf16 - write buffer to NAND controller
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ */
+static void omap_write_buf16(struct mtd_info *mtd, const u_char * buf, int len)
+{
+	struct omap_nand_info *info = container_of(mtd,
+						struct omap_nand_info, mtd);
+	u16 *p = (u16 *) buf;
+
+	/* FIXME try bursts of writesw() or DMA ... */
+	len >>= 1;
+
+	while (len--) {
+		writew(*p++, info->nand.IO_ADDR_W);
+
+		while (GPMC_BUF_EMPTY == (readl(info->gpmc_baseaddr +
+						GPMC_STATUS) & GPMC_BUF_FULL))
+			;
+	}
+}
+/**
+ * omap_verify_buf - Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ */
+static int omap_verify_buf(struct mtd_info *mtd, const u_char * buf, int len)
+{
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	u16 *p = (u16 *) buf;
+
+	len >>= 1;
+	while (len--) {
+		if (*p++ != cpu_to_le16(readw(info->nand.IO_ADDR_R)))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_MTD_NAND_OMAP_HWECC
+/**
+ * omap_hwecc_init - Initialize the HW ECC for NAND flash in GPMC controller
+ * @mtd: MTD device structure
+ */
+static void omap_hwecc_init(struct mtd_info *mtd)
+{
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	struct nand_chip *chip = mtd->priv;
+	unsigned long val = 0x0;
+
+	/* Read from ECC Control Register */
+	val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+	/* Clear all ECC | Enable Reg1 */
+	val = ((0x00000001<<8) | 0x00000001);
+	__raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+
+	/* Read from ECC Size Config Register */
+	val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_SIZE_CONFIG);
+	/* ECCSIZE1=512 | Select eccResultsize[0-3] */
+	val = ((((chip->ecc.size >> 1) - 1) << 22) | (0x0000000F));
+	__raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_SIZE_CONFIG);
+}
+
+/**
+ * gen_true_ecc - This function will generate true ECC value
+ * @ecc_buf: buffer to store ecc code
+ *
+ * This generated true ECC value can be used when correcting
+ * data read from NAND flash memory core
+ */
+static void gen_true_ecc(u8 *ecc_buf)
+{
+	u32 tmp = ecc_buf[0] | (ecc_buf[1] << 16) |
+		((ecc_buf[2] & 0xF0) << 20) | ((ecc_buf[2] & 0x0F) << 8);
+
+	ecc_buf[0] = ~(P64o(tmp) | P64e(tmp) | P32o(tmp) | P32e(tmp) |
+			P16o(tmp) | P16e(tmp) | P8o(tmp) | P8e(tmp));
+	ecc_buf[1] = ~(P1024o(tmp) | P1024e(tmp) | P512o(tmp) | P512e(tmp) |
+			P256o(tmp) | P256e(tmp) | P128o(tmp) | P128e(tmp));
+	ecc_buf[2] = ~(P4o(tmp) | P4e(tmp) | P2o(tmp) | P2e(tmp) | P1o(tmp) |
+			P1e(tmp) | P2048o(tmp) | P2048e(tmp));
+}
+
+/**
+ * omap_compare_ecc - Detect (2 bits) and correct (1 bit) error in data
+ * @ecc_data1:  ecc code from nand spare area
+ * @ecc_data2:  ecc code from hardware register obtained from hardware ecc
+ * @page_data:  page data
+ *
+ * This function compares two ECC's and indicates if there is an error.
+ * If the error can be corrected it will be corrected to the buffer.
+ */
+static int omap_compare_ecc(u8 *ecc_data1,	/* read from NAND memory */
+			    u8 *ecc_data2,	/* read from register */
+			    u8 *page_data)
+{
+	uint	i;
+	u8	tmp0_bit[8], tmp1_bit[8], tmp2_bit[8];
+	u8	comp0_bit[8], comp1_bit[8], comp2_bit[8];
+	u8	ecc_bit[24];
+	u8	ecc_sum = 0;
+	u8	find_bit = 0;
+	uint	find_byte = 0;
+	int	isEccFF;
+
+	isEccFF = ((*(u32 *)ecc_data1 & 0xFFFFFF) == 0xFFFFFF);
+
+	gen_true_ecc(ecc_data1);
+	gen_true_ecc(ecc_data2);
+
+	for (i = 0; i <= 2; i++) {
+		*(ecc_data1 + i) = ~(*(ecc_data1 + i));
+		*(ecc_data2 + i) = ~(*(ecc_data2 + i));
+	}
+
+	for (i = 0; i < 8; i++) {
+		tmp0_bit[i]     = *ecc_data1 % 2;
+		*ecc_data1	= *ecc_data1 / 2;
+	}
+
+	for (i = 0; i < 8; i++) {
+		tmp1_bit[i]	 = *(ecc_data1 + 1) % 2;
+		*(ecc_data1 + 1) = *(ecc_data1 + 1) / 2;
+	}
+
+	for (i = 0; i < 8; i++) {
+		tmp2_bit[i]	 = *(ecc_data1 + 2) % 2;
+		*(ecc_data1 + 2) = *(ecc_data1 + 2) / 2;
+	}
+
+	for (i = 0; i < 8; i++) {
+		comp0_bit[i]     = *ecc_data2 % 2;
+		*ecc_data2       = *ecc_data2 / 2;
+	}
+
+	for (i = 0; i < 8; i++) {
+		comp1_bit[i]     = *(ecc_data2 + 1) % 2;
+		*(ecc_data2 + 1) = *(ecc_data2 + 1) / 2;
+	}
+
+	for (i = 0; i < 8; i++) {
+		comp2_bit[i]     = *(ecc_data2 + 2) % 2;
+		*(ecc_data2 + 2) = *(ecc_data2 + 2) / 2;
+	}
+
+	for (i = 0; i < 6; i++)
+		ecc_bit[i] = tmp2_bit[i + 2] ^ comp2_bit[i + 2];
+
+	for (i = 0; i < 8; i++)
+		ecc_bit[i + 6] = tmp0_bit[i] ^ comp0_bit[i];
+
+	for (i = 0; i < 8; i++)
+		ecc_bit[i + 14] = tmp1_bit[i] ^ comp1_bit[i];
+
+	ecc_bit[22] = tmp2_bit[0] ^ comp2_bit[0];
+	ecc_bit[23] = tmp2_bit[1] ^ comp2_bit[1];
+
+	for (i = 0; i < 24; i++)
+		ecc_sum += ecc_bit[i];
+
+	switch (ecc_sum) {
+	case 0:
+		/* Not reached because this function is not called if
+		 *  ECC values are equal
+		 */
+		return 0;
+
+	case 1:
+		/* Uncorrectable error */
+		DEBUG(MTD_DEBUG_LEVEL0, "ECC UNCORRECTED_ERROR 1\n");
+		return -1;
+
+	case 11:
+		/* UN-Correctable error */
+		DEBUG(MTD_DEBUG_LEVEL0, "ECC UNCORRECTED_ERROR B\n");
+		return -1;
+
+	case 12:
+		/* Correctable error */
+		find_byte = (ecc_bit[23] << 8) +
+			    (ecc_bit[21] << 7) +
+			    (ecc_bit[19] << 6) +
+			    (ecc_bit[17] << 5) +
+			    (ecc_bit[15] << 4) +
+			    (ecc_bit[13] << 3) +
+			    (ecc_bit[11] << 2) +
+			    (ecc_bit[9]  << 1) +
+			    ecc_bit[7];
+
+		find_bit = (ecc_bit[5] << 2) + (ecc_bit[3] << 1) + ecc_bit[1];
+
+		DEBUG(MTD_DEBUG_LEVEL0, "Correcting single bit ECC error at "
+				"offset: %d, bit: %d\n", find_byte, find_bit);
+
+		page_data[find_byte] ^= (1 << find_bit);
+
+		return 0;
+	default:
+		if (isEccFF) {
+			if (ecc_data2[0] == 0 &&
+			    ecc_data2[1] == 0 &&
+			    ecc_data2[2] == 0)
+				return 0;
+		}
+		DEBUG(MTD_DEBUG_LEVEL0, "UNCORRECTED_ERROR default\n");
+		return -1;
+	}
+}
+
+/**
+ * omap_correct_data - Compares the ECC read with HW generated ECC
+ * @mtd: MTD device structure
+ * @dat: page data
+ * @read_ecc: ecc read from nand flash
+ * @calc_ecc: ecc read from HW ECC registers
+ *
+ * Compares the ecc read from nand spare area with ECC registers values
+ * and if ECC's mismached, it will call 'omap_compare_ecc' for error detection
+ * and correction.
+ */
+static int omap_correct_data(struct mtd_info *mtd, u_char *dat,
+				u_char *read_ecc, u_char *calc_ecc)
+{
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	int blockCnt = 0, i = 0, ret = 0;
+
+	/* Ex NAND_ECC_HW12_2048 */
+	if ((info->nand.ecc.mode == NAND_ECC_HW) &&
+			(info->nand.ecc.size  == 2048))
+		blockCnt = 4;
+	else
+		blockCnt = 1;
+
+	for (i = 0; i < blockCnt; i++) {
+		if (memcmp(read_ecc, calc_ecc, 3) != 0) {
+			ret = omap_compare_ecc(read_ecc, calc_ecc, dat);
+			if (ret < 0)
+				return ret;
+		}
+		read_ecc += 3;
+		calc_ecc += 3;
+		dat      += 512;
+	}
+	return 0;
+}
+
+/**
+ * omap_calcuate_ecc - Generate non-inverted ECC bytes.
+ * @mtd: MTD device structure
+ * @dat: The pointer to data on which ecc is computed
+ * @ecc_code: The ecc_code buffer
+ *
+ * Using noninverted ECC can be considered ugly since writing a blank
+ * page ie. padding will clear the ECC bytes. This is no problem as long
+ * nobody is trying to write data on the seemingly unused page. Reading
+ * an erased page will produce an ECC mismatch between generated and read
+ * ECC bytes that has to be dealt with separately.
+ */
+static int omap_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+				u_char *ecc_code)
+{
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	unsigned long val = 0x0;
+	unsigned long reg;
+
+	/* Start Reading from HW ECC1_Result = 0x200 */
+	reg = (unsigned long)(info->gpmc_baseaddr + GPMC_ECC1_RESULT);
+	val = __raw_readl(reg);
+	*ecc_code++ = val;          /* P128e, ..., P1e */
+	*ecc_code++ = val >> 16;    /* P128o, ..., P1o */
+	/* P2048o, P1024o, P512o, P256o, P2048e, P1024e, P512e, P256e */
+	*ecc_code++ = ((val >> 8) & 0x0f) | ((val >> 20) & 0xf0);
+	reg += 4;
+
+	return 0;
+}
+
+/**
+ * omap_enable_hwecc - This function enables the hardware ecc functionality
+ * @mtd: MTD device structure
+ * @mode: Read/Write mode
+ */
+static void omap_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	struct nand_chip *chip = mtd->priv;
+	unsigned int dev_width = (chip->options & NAND_BUSWIDTH_16) ? 1 : 0;
+	unsigned long val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_CONFIG);
+
+	switch (mode) {
+	case NAND_ECC_READ:
+		__raw_writel(0x101, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+		/* (ECC 16 or 8 bit col) | ( CS  )  | ECC Enable */
+		val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+		break;
+	case NAND_ECC_READSYN:
+		 __raw_writel(0x100, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+		/* (ECC 16 or 8 bit col) | ( CS  )  | ECC Enable */
+		val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+		break;
+	case NAND_ECC_WRITE:
+		__raw_writel(0x101, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+		/* (ECC 16 or 8 bit col) | ( CS  )  | ECC Enable */
+		val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+		break;
+	default:
+		DEBUG(MTD_DEBUG_LEVEL0, "Error: Unrecognized Mode[%d]!\n",
+					mode);
+		break;
+	}
+
+	__raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_CONFIG);
+}
+#endif
+
+/**
+ * omap_wait - wait until the command is done
+ * @mtd: MTD device structure
+ * @chip: NAND Chip structure
+ *
+ * Wait function is called during Program and erase operations and
+ * the way it is called from MTD layer, we should wait till the NAND
+ * chip is ready after the programming/erase operation has completed.
+ *
+ * Erase can take up to 400ms and program up to 20ms according to
+ * general NAND and SmartMedia specs
+ */
+static int omap_wait(struct mtd_info *mtd, struct nand_chip *chip)
+{
+	struct nand_chip *this = mtd->priv;
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	unsigned long timeo = jiffies;
+	int status, state = this->state;
+
+	if (state == FL_ERASING)
+		timeo += (HZ * 400) / 1000;
+	else
+		timeo += (HZ * 20) / 1000;
+
+	this->IO_ADDR_W = (void *) info->gpmc_cs_baseaddr +
+						GPMC_CS_NAND_COMMAND;
+	this->IO_ADDR_R = (void *) info->gpmc_cs_baseaddr + GPMC_CS_NAND_DATA;
+
+	__raw_writeb(NAND_CMD_STATUS & 0xFF, this->IO_ADDR_W);
+
+	while (time_before(jiffies, timeo)) {
+		status = __raw_readb(this->IO_ADDR_R);
+		if (!(status & 0x40))
+			break;
+	}
+	return status;
+}
+
+/**
+ * omap_dev_ready - calls the platform specific dev_ready function
+ * @mtd: MTD device structure
+ */
+static int omap_dev_ready(struct mtd_info *mtd)
+{
+	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+							mtd);
+	unsigned int val = __raw_readl(info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+
+	if ((val & 0x100) == 0x100) {
+		/* Clear IRQ Interrupt */
+		val |= 0x100;
+		val &= ~(0x0);
+		__raw_writel(val, info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+	} else {
+		unsigned int cnt = 0;
+		while (cnt++ < 0x1FF) {
+			if  ((val & 0x100) == 0x100)
+				return 0;
+			val = __raw_readl(info->gpmc_baseaddr +
+							GPMC_IRQ_STATUS);
+		}
+	}
+
+	return 1;
+}
+
+static int __devinit omap_nand_probe(struct platform_device *pdev)
+{
+	struct omap_nand_info		*info;
+	struct omap_nand_platform_data	*pdata;
+	int				err;
+	unsigned long 			val;
+
+
+	pdata = pdev->dev.platform_data;
+	if (pdata == NULL) {
+		dev_err(&pdev->dev, "platform data missing\n");
+		return -ENODEV;
+	}
+
+	info = kzalloc(sizeof(struct omap_nand_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, info);
+
+	spin_lock_init(&info->controller.lock);
+	init_waitqueue_head(&info->controller.wq);
+
+	info->pdev = pdev;
+
+	info->gpmc_cs		= pdata->cs;
+	info->gpmc_baseaddr	= pdata->gpmc_baseaddr;
+	info->gpmc_cs_baseaddr	= pdata->gpmc_cs_baseaddr;
+
+	info->mtd.priv		= &info->nand;
+	info->mtd.name		= dev_name(&pdev->dev);
+	info->mtd.owner		= THIS_MODULE;
+
+	err = gpmc_cs_request(info->gpmc_cs, NAND_IO_SIZE, &info->phys_base);
+	if (err < 0) {
+		dev_err(&pdev->dev, "Cannot request GPMC CS\n");
+		goto out_free_info;
+	}
+
+	/* Enable RD PIN Monitoring Reg */
+	if (pdata->dev_ready) {
+		val  = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1);
+		val |= WR_RD_PIN_MONITORING;
+		gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG1, val);
+	}
+
+	val  = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG7);
+	val &= ~(0xf << 8);
+	val |=  (0xc & 0xf) << 8;
+	gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG7, val);
+
+	/* NAND write protect off */
+	omap_nand_wp(&info->mtd, NAND_WP_OFF);
+
+	if (!request_mem_region(info->phys_base, NAND_IO_SIZE,
+				pdev->dev.driver->name)) {
+		err = -EBUSY;
+		goto out_free_cs;
+	}
+
+	info->nand.IO_ADDR_R = ioremap(info->phys_base, NAND_IO_SIZE);
+	if (!info->nand.IO_ADDR_R) {
+		err = -ENOMEM;
+		goto out_release_mem_region;
+	}
+	info->nand.controller = &info->controller;
+
+	info->nand.IO_ADDR_W = info->nand.IO_ADDR_R;
+	info->nand.cmd_ctrl  = omap_hwcontrol;
+
+	/* REVISIT:  only supports 16-bit NAND flash */
+
+	info->nand.read_buf   = omap_read_buf16;
+	info->nand.write_buf  = omap_write_buf16;
+	info->nand.verify_buf = omap_verify_buf;
+
+	/*
+	 * If RDY/BSY line is connected to OMAP then use the omap ready
+	 * funcrtion and the generic nand_wait function which reads the status
+	 * register after monitoring the RDY/BSY line.Otherwise use a standard
+	 * chip delay which is slightly more than tR (AC Timing) of the NAND
+	 * device and read status register until you get a failure or success
+	 */
+	if (pdata->dev_ready) {
+		info->nand.dev_ready = omap_dev_ready;
+		info->nand.chip_delay = 0;
+	} else {
+		info->nand.waitfunc = omap_wait;
+		info->nand.chip_delay = 50;
+	}
+
+	info->nand.options  |= NAND_SKIP_BBTSCAN;
+	if ((gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1) & 0x3000)
+								== 0x1000)
+		info->nand.options  |= NAND_BUSWIDTH_16;
+
+#ifdef CONFIG_MTD_NAND_OMAP_HWECC
+	info->nand.ecc.bytes		= 3;
+	info->nand.ecc.size		= 512;
+	info->nand.ecc.calculate	= omap_calculate_ecc;
+	info->nand.ecc.hwctl		= omap_enable_hwecc;
+	info->nand.ecc.correct		= omap_correct_data;
+	info->nand.ecc.mode		= NAND_ECC_HW;
+
+	/* init HW ECC */
+	omap_hwecc_init(&info->mtd);
+#else
+	info->nand.ecc.mode = NAND_ECC_SOFT;
+#endif
+
+	/* DIP switches on some boards change between 8 and 16 bit
+	 * bus widths for flash.  Try the other width if the first try fails.
+	 */
+	if (nand_scan(&info->mtd, 1)) {
+		info->nand.options ^= NAND_BUSWIDTH_16;
+		if (nand_scan(&info->mtd, 1)) {
+			err = -ENXIO;
+			goto out_release_mem_region;
+		}
+	}
+
+#ifdef CONFIG_MTD_PARTITIONS
+	err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
+	if (err > 0)
+		add_mtd_partitions(&info->mtd, info->parts, err);
+	else if (pdata->parts)
+		add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
+	else
+#endif
+		add_mtd_device(&info->mtd);
+
+	platform_set_drvdata(pdev, &info->mtd);
+
+	return 0;
+
+out_release_mem_region:
+	release_mem_region(info->phys_base, NAND_IO_SIZE);
+out_free_cs:
+	gpmc_cs_free(info->gpmc_cs);
+out_free_info:
+	kfree(info);
+
+	return err;
+}
+
+static int omap_nand_remove(struct platform_device *pdev)
+{
+	struct mtd_info *mtd = platform_get_drvdata(pdev);
+	struct omap_nand_info *info = mtd->priv;
+
+	platform_set_drvdata(pdev, NULL);
+	/* Release NAND device, its internal structures and partitions */
+	nand_release(&info->mtd);
+	iounmap(info->nand.IO_ADDR_R);
+	kfree(&info->mtd);
+	return 0;
+}
+
+static struct platform_driver omap_nand_driver = {
+	.probe		= omap_nand_probe,
+	.remove		= omap_nand_remove,
+	.driver		= {
+		.name	= DRIVER_NAME,
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init omap_nand_init(void)
+{
+	printk(KERN_INFO "%s driver initializing\n", DRIVER_NAME);
+	return platform_driver_register(&omap_nand_driver);
+}
+
+static void __exit omap_nand_exit(void)
+{
+	platform_driver_unregister(&omap_nand_driver);
+}
+
+module_init(omap_nand_init);
+module_exit(omap_nand_exit);
+
+MODULE_ALIAS(DRIVER_NAME);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Glue layer for NAND flash on TI OMAP boards");

drivers/mtd/nand/orion_nand.c

@@ -47,6 +47,28 @@ static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl
 	writeb(cmd, nc->IO_ADDR_W + offs);
 }
 
+static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+	struct nand_chip *chip = mtd->priv;
+	void __iomem *io_base = chip->IO_ADDR_R;
+	uint64_t *buf64;
+	int i = 0;
+
+	while (len && (unsigned long)buf & 7) {
+		*buf++ = readb(io_base);
+		len--;
+	}
+	buf64 = (uint64_t *)buf;
+	while (i < len/8) {
+		uint64_t x;
+		asm ("ldrd\t%0, [%1]" : "=r" (x) : "r" (io_base));
+		buf64[i++] = x;
+	}
+	i *= 8;
+	while (i < len)
+		buf[i++] = readb(io_base);
+}
+
 static int __init orion_nand_probe(struct platform_device *pdev)
 {
 	struct mtd_info *mtd;
@@ -83,6 +105,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
 	nc->priv = board;
 	nc->IO_ADDR_R = nc->IO_ADDR_W = io_base;
 	nc->cmd_ctrl = orion_nand_cmd_ctrl;
+	nc->read_buf = orion_nand_read_buf;
 	nc->ecc.mode = NAND_ECC_SOFT;
 
 	if (board->chip_delay)

drivers/mtd/nand/plat_nand.c

@@ -61,6 +61,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
 	data->chip.cmd_ctrl = pdata->ctrl.cmd_ctrl;
 	data->chip.dev_ready = pdata->ctrl.dev_ready;
 	data->chip.select_chip = pdata->ctrl.select_chip;
+	data->chip.write_buf = pdata->ctrl.write_buf;
+	data->chip.read_buf = pdata->ctrl.read_buf;
 	data->chip.chip_delay = pdata->chip.chip_delay;
 	data->chip.options |= pdata->chip.options;
 
@@ -70,6 +72,13 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, data);
 
+	/* Handle any platform specific setup */
+	if (pdata->ctrl.probe) {
+		res = pdata->ctrl.probe(pdev);
+		if (res)
+			goto out;
+	}
+
 	/* Scan to find existance of the device */
 	if (nand_scan(&data->mtd, 1)) {
 		res = -ENXIO;
@@ -86,6 +95,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
 			return 0;
 		}
 	}
+	if (pdata->chip.set_parts)
+		pdata->chip.set_parts(data->mtd.size, &pdata->chip);
 	if (pdata->chip.partitions) {
 		data->parts = pdata->chip.partitions;
 		res = add_mtd_partitions(&data->mtd, data->parts,
@@ -99,6 +110,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
 
 	nand_release(&data->mtd);
 out:
+	if (pdata->ctrl.remove)
+		pdata->ctrl.remove(pdev);
 	platform_set_drvdata(pdev, NULL);
 	iounmap(data->io_base);
 	kfree(data);
@@ -111,15 +124,15 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
 static int __devexit plat_nand_remove(struct platform_device *pdev)
 {
 	struct plat_nand_data *data = platform_get_drvdata(pdev);
-#ifdef CONFIG_MTD_PARTITIONS
 	struct platform_nand_data *pdata = pdev->dev.platform_data;
-#endif
 
 	nand_release(&data->mtd);
 #ifdef CONFIG_MTD_PARTITIONS
 	if (data->parts && data->parts != pdata->chip.partitions)
 		kfree(data->parts);
 #endif
+	if (pdata->ctrl.remove)
+		pdata->ctrl.remove(pdev);
 	iounmap(data->io_base);
 	kfree(data);
 
@@ -128,7 +141,7 @@ static int __devexit plat_nand_remove(struct platform_device *pdev)
 
 static struct platform_driver plat_nand_driver = {
 	.probe		= plat_nand_probe,
-	.remove		= plat_nand_remove,
+	.remove		= __devexit_p(plat_nand_remove),
 	.driver		= {
 		.name	= "gen_nand",
 		.owner	= THIS_MODULE,

drivers/mtd/nand/s3c2410.c

@@ -74,6 +74,14 @@ static struct nand_ecclayout nand_hw_eccoob = {
 
 struct s3c2410_nand_info;
 
+/**
+ * struct s3c2410_nand_mtd - driver MTD structure
+ * @mtd: The MTD instance to pass to the MTD layer.
+ * @chip: The NAND chip information.
+ * @set: The platform information supplied for this set of NAND chips.
+ * @info: Link back to the hardware information.
+ * @scan_res: The result from calling nand_scan_ident().
+*/
 struct s3c2410_nand_mtd {
 	struct mtd_info			mtd;
 	struct nand_chip		chip;
@@ -90,6 +98,21 @@ enum s3c_cpu_type {
 
 /* overview of the s3c2410 nand state */
 
+/**
+ * struct s3c2410_nand_info - NAND controller state.
+ * @mtds: An array of MTD instances on this controoler.
+ * @platform: The platform data for this board.
+ * @device: The platform device we bound to.
+ * @area: The IO area resource that came from request_mem_region().
+ * @clk: The clock resource for this controller.
+ * @regs: The area mapped for the hardware registers described by @area.
+ * @sel_reg: Pointer to the register controlling the NAND selection.
+ * @sel_bit: The bit in @sel_reg to select the NAND chip.
+ * @mtd_count: The number of MTDs created from this controller.
+ * @save_sel: The contents of @sel_reg to be saved over suspend.
+ * @clk_rate: The clock rate from @clk.
+ * @cpu_type: The exact type of this controller.
+ */
 struct s3c2410_nand_info {
 	/* mtd info */
 	struct nand_hw_control		controller;
@@ -145,12 +168,19 @@ static inline int allow_clk_stop(struct s3c2410_nand_info *info)
 
 #define NS_IN_KHZ 1000000
 
+/**
+ * s3c_nand_calc_rate - calculate timing data.
+ * @wanted: The cycle time in nanoseconds.
+ * @clk: The clock rate in kHz.
+ * @max: The maximum divider value.
+ *
+ * Calculate the timing value from the given parameters.
+ */
 static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
 {
 	int result;
 
-	result = (wanted * clk) / NS_IN_KHZ;
-	result++;
+	result = DIV_ROUND_UP((wanted * clk), NS_IN_KHZ);
 
 	pr_debug("result %d from %ld, %d\n", result, clk, wanted);
 
@@ -169,13 +199,21 @@ static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
 
 /* controller setup */
 
+/**
+ * s3c2410_nand_setrate - setup controller timing information.
+ * @info: The controller instance.
+ *
+ * Given the information supplied by the platform, calculate and set
+ * the necessary timing registers in the hardware to generate the
+ * necessary timing cycles to the hardware.
+ */
 static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
 {
 	struct s3c2410_platform_nand *plat = info->platform;
 	int tacls_max = (info->cpu_type == TYPE_S3C2412) ? 8 : 4;
 	int tacls, twrph0, twrph1;
 	unsigned long clkrate = clk_get_rate(info->clk);
-	unsigned long set, cfg, mask;
+	unsigned long uninitialized_var(set), cfg, uninitialized_var(mask);
 	unsigned long flags;
 
 	/* calculate the timing information for the controller */
@@ -215,9 +253,9 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
 
 	case TYPE_S3C2440:
 	case TYPE_S3C2412:
-		mask = (S3C2410_NFCONF_TACLS(tacls_max - 1) |
-			S3C2410_NFCONF_TWRPH0(7) |
-			S3C2410_NFCONF_TWRPH1(7));
+		mask = (S3C2440_NFCONF_TACLS(tacls_max - 1) |
+			S3C2440_NFCONF_TWRPH0(7) |
+			S3C2440_NFCONF_TWRPH1(7));
 
 		set = S3C2440_NFCONF_TACLS(tacls - 1);
 		set |= S3C2440_NFCONF_TWRPH0(twrph0 - 1);
@@ -225,14 +263,9 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
 		break;
 
 	default:
-		/* keep compiler happy */
-		mask = 0;
-		set = 0;
 		BUG();
 	}
 
-	dev_dbg(info->device, "NF_CONF is 0x%lx\n", cfg);
-
 	local_irq_save(flags);
 
 	cfg = readl(info->regs + S3C2410_NFCONF);
@@ -242,9 +275,18 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
 
 	local_irq_restore(flags);
 
+	dev_dbg(info->device, "NF_CONF is 0x%lx\n", cfg);
+
 	return 0;
 }
 
+/**
+ * s3c2410_nand_inithw - basic hardware initialisation
+ * @info: The hardware state.
+ *
+ * Do the basic initialisation of the hardware, using s3c2410_nand_setrate()
+ * to setup the hardware access speeds and set the controller to be enabled.
+*/
 static int s3c2410_nand_inithw(struct s3c2410_nand_info *info)
 {
 	int ret;
@@ -268,8 +310,19 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info)
 	return 0;
 }
 
-/* select chip */
-
+/**
+ * s3c2410_nand_select_chip - select the given nand chip
+ * @mtd: The MTD instance for this chip.
+ * @chip: The chip number.
+ *
+ * This is called by the MTD layer to either select a given chip for the
+ * @mtd instance, or to indicate that the access has finished and the
+ * chip can be de-selected.
+ *
+ * The routine ensures that the nFCE line is correctly setup, and any
+ * platform specific selection code is called to route nFCE to the specific
+ * chip.
+ */
 static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip)
 {
 	struct s3c2410_nand_info *info;
@@ -530,7 +583,16 @@ static void s3c2410_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
 static void s3c2440_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
 {
 	struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
-	readsl(info->regs + S3C2440_NFDATA, buf, len / 4);
+
+	readsl(info->regs + S3C2440_NFDATA, buf, len >> 2);
+
+	/* cleanup if we've got less than a word to do */
+	if (len & 3) {
+		buf += len & ~3;
+
+		for (; len & 3; len--)
+			*buf++ = readb(info->regs + S3C2440_NFDATA);
+	}
 }
 
 static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
@@ -542,7 +604,16 @@ static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int
 static void s3c2440_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
 {
 	struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
-	writesl(info->regs + S3C2440_NFDATA, buf, len / 4);
+
+	writesl(info->regs + S3C2440_NFDATA, buf, len >> 2);
+
+	/* cleanup any fractional write */
+	if (len & 3) {
+		buf += len & ~3;
+
+		for (; len & 3; len--, buf++)
+			writeb(*buf, info->regs + S3C2440_NFDATA);
+	}
 }
 
 /* cpufreq driver support */
@@ -593,7 +664,7 @@ static inline void s3c2410_nand_cpufreq_deregister(struct s3c2410_nand_info *inf
 
 /* device management functions */
 
-static int s3c2410_nand_remove(struct platform_device *pdev)
+static int s3c24xx_nand_remove(struct platform_device *pdev)
 {
 	struct s3c2410_nand_info *info = to_nand_info(pdev);
 
@@ -645,17 +716,31 @@ static int s3c2410_nand_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_MTD_PARTITIONS
+const char *part_probes[] = { "cmdlinepart", NULL };
 static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info,
 				      struct s3c2410_nand_mtd *mtd,
 				      struct s3c2410_nand_set *set)
 {
+	struct mtd_partition *part_info;
+	int nr_part = 0;
+
 	if (set == NULL)
 		return add_mtd_device(&mtd->mtd);
 
+	if (set->nr_partitions == 0) {
+		mtd->mtd.name = set->name;
+		nr_part = parse_mtd_partitions(&mtd->mtd, part_probes,
+						&part_info, 0);
+	} else {
 		if (set->nr_partitions > 0 && set->partitions != NULL) {
-		return add_mtd_partitions(&mtd->mtd, set->partitions, set->nr_partitions);
+			nr_part = set->nr_partitions;
+			part_info = set->partitions;
+		}
 	}
 
+	if (nr_part > 0 && part_info)
+		return add_mtd_partitions(&mtd->mtd, part_info, nr_part);
+
 	return add_mtd_device(&mtd->mtd);
 }
 #else
@@ -667,11 +752,16 @@ static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info,
 }
 #endif
 
-/* s3c2410_nand_init_chip
+/**
+ * s3c2410_nand_init_chip - initialise a single instance of an chip
+ * @info: The base NAND controller the chip is on.
+ * @nmtd: The new controller MTD instance to fill in.
+ * @set: The information passed from the board specific platform data.
  *
- * init a single instance of an chip
-*/
-
+ * Initialise the given @nmtd from the information in @info and @set. This
+ * readies the structure for use with the MTD layer functions by ensuring
+ * all pointers are setup and the necessary control routines selected.
+ */
 static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
 				   struct s3c2410_nand_mtd *nmtd,
 				   struct s3c2410_nand_set *set)
@@ -757,14 +847,40 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
 
 	if (set->disable_ecc)
 		chip->ecc.mode	= NAND_ECC_NONE;
+
+	switch (chip->ecc.mode) {
+	case NAND_ECC_NONE:
+		dev_info(info->device, "NAND ECC disabled\n");
+		break;
+	case NAND_ECC_SOFT:
+		dev_info(info->device, "NAND soft ECC\n");
+		break;
+	case NAND_ECC_HW:
+		dev_info(info->device, "NAND hardware ECC\n");
+		break;
+	default:
+		dev_info(info->device, "NAND ECC UNKNOWN\n");
+		break;
+	}
+
+	/* If you use u-boot BBT creation code, specifying this flag will
+	 * let the kernel fish out the BBT from the NAND, and also skip the
+	 * full NAND scan that can take 1/2s or so. Little things... */
+	if (set->flash_bbt)
+		chip->options |= NAND_USE_FLASH_BBT | NAND_SKIP_BBTSCAN;
 }
 
-/* s3c2410_nand_update_chip
+/**
+ * s3c2410_nand_update_chip - post probe update
+ * @info: The controller instance.
+ * @nmtd: The driver version of the MTD instance.
  *
- * post-probe chip update, to change any items, such as the
- * layout for large page nand
- */
-
+ * This routine is called after the chip probe has succesfully completed
+ * and the relevant per-chip information updated. This call ensure that
+ * we update the internal state accordingly.
+ *
+ * The internal state is currently limited to the ECC state information.
+*/
 static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
 				     struct s3c2410_nand_mtd *nmtd)
 {
@@ -773,7 +889,9 @@ static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
 	dev_dbg(info->device, "chip %p => page shift %d\n",
 		chip, chip->page_shift);
 
-	if (hardware_ecc) {
+	if (chip->ecc.mode != NAND_ECC_HW)
+		return;
+
 		/* change the behaviour depending on wether we are using
 		 * the large or small page nand device */
 
@@ -785,21 +903,19 @@ static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
 		chip->ecc.bytes	    = 3;
 		chip->ecc.layout    = &nand_hw_eccoob;
 	}
-	}
 }
 
-/* s3c2410_nand_probe
+/* s3c24xx_nand_probe
  *
  * called by device layer when it finds a device matching
  * one our driver can handled. This code checks to see if
  * it can allocate all necessary resources then calls the
  * nand layer to look for devices
 */
-
-static int s3c24xx_nand_probe(struct platform_device *pdev,
-			      enum s3c_cpu_type cpu_type)
+static int s3c24xx_nand_probe(struct platform_device *pdev)
 {
 	struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
+	enum s3c_cpu_type cpu_type; 
 	struct s3c2410_nand_info *info;
 	struct s3c2410_nand_mtd *nmtd;
 	struct s3c2410_nand_set *sets;
@@ -809,6 +925,8 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
 	int nr_sets;
 	int setno;
 
+	cpu_type = platform_get_device_id(pdev)->driver_data;
+
 	pr_debug("s3c2410_nand_probe(%p)\n", pdev);
 
 	info = kmalloc(sizeof(*info), GFP_KERNEL);
@@ -922,7 +1040,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
 	return 0;
 
  exit_error:
-	s3c2410_nand_remove(pdev);
+	s3c24xx_nand_remove(pdev);
 
 	if (err == 0)
 		err = -EINVAL;
@@ -983,50 +1101,33 @@ static int s3c24xx_nand_resume(struct platform_device *dev)
 
 /* driver device registration */
 
-static int s3c2410_nand_probe(struct platform_device *dev)
-{
-	return s3c24xx_nand_probe(dev, TYPE_S3C2410);
-}
-
-static int s3c2440_nand_probe(struct platform_device *dev)
-{
-	return s3c24xx_nand_probe(dev, TYPE_S3C2440);
-}
-
-static int s3c2412_nand_probe(struct platform_device *dev)
-{
-	return s3c24xx_nand_probe(dev, TYPE_S3C2412);
-}
-
-static struct platform_driver s3c2410_nand_driver = {
-	.probe		= s3c2410_nand_probe,
-	.remove		= s3c2410_nand_remove,
-	.suspend	= s3c24xx_nand_suspend,
-	.resume		= s3c24xx_nand_resume,
-	.driver		= {
+static struct platform_device_id s3c24xx_driver_ids[] = {
+	{
 		.name		= "s3c2410-nand",
-		.owner	= THIS_MODULE,
-	},
-};
-
-static struct platform_driver s3c2440_nand_driver = {
-	.probe		= s3c2440_nand_probe,
-	.remove		= s3c2410_nand_remove,
-	.suspend	= s3c24xx_nand_suspend,
-	.resume		= s3c24xx_nand_resume,
-	.driver		= {
+		.driver_data	= TYPE_S3C2410,
+	}, {
 		.name		= "s3c2440-nand",
-		.owner	= THIS_MODULE,
+		.driver_data	= TYPE_S3C2440,
+	}, {
+		.name		= "s3c2412-nand",
+		.driver_data	= TYPE_S3C2412,
+	}, {
+		.name		= "s3c6400-nand",
+		.driver_data	= TYPE_S3C2412, /* compatible with 2412 */
 	},
+	{ }
 };
 
-static struct platform_driver s3c2412_nand_driver = {
-	.probe		= s3c2412_nand_probe,
-	.remove		= s3c2410_nand_remove,
+MODULE_DEVICE_TABLE(platform, s3c24xx_driver_ids);
+
+static struct platform_driver s3c24xx_nand_driver = {
+	.probe		= s3c24xx_nand_probe,
+	.remove		= s3c24xx_nand_remove,
 	.suspend	= s3c24xx_nand_suspend,
 	.resume		= s3c24xx_nand_resume,
+	.id_table	= s3c24xx_driver_ids,
 	.driver		= {
-		.name	= "s3c2412-nand",
+		.name	= "s3c24xx-nand",
 		.owner	= THIS_MODULE,
 	},
 };
@@ -1035,16 +1136,12 @@ static int __init s3c2410_nand_init(void)
 {
 	printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n");
 
-	platform_driver_register(&s3c2412_nand_driver);
-	platform_driver_register(&s3c2440_nand_driver);
-	return platform_driver_register(&s3c2410_nand_driver);
+	return platform_driver_register(&s3c24xx_nand_driver);
 }
 
 static void __exit s3c2410_nand_exit(void)
 {
-	platform_driver_unregister(&s3c2412_nand_driver);
-	platform_driver_unregister(&s3c2440_nand_driver);
-	platform_driver_unregister(&s3c2410_nand_driver);
+	platform_driver_unregister(&s3c24xx_nand_driver);
 }
 
 module_init(s3c2410_nand_init);
@@ -1053,6 +1150,3 @@ module_exit(s3c2410_nand_exit);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
 MODULE_DESCRIPTION("S3C24XX MTD NAND driver");
-MODULE_ALIAS("platform:s3c2410-nand");
-MODULE_ALIAS("platform:s3c2412-nand");
-MODULE_ALIAS("platform:s3c2440-nand");

drivers/mtd/nand/txx9ndfmc.c

@@ -64,7 +64,7 @@ struct txx9ndfmc_priv {
 	struct nand_chip chip;
 	struct mtd_info mtd;
 	int cs;
-	char mtdname[BUS_ID_SIZE + 2];
+	const char *mtdname;
 };
 
 #define MAX_TXX9NDFMC_DEV	4
@@ -334,16 +334,23 @@ static int __init txx9ndfmc_probe(struct platform_device *dev)
 
 		if (plat->ch_mask != 1) {
 			txx9_priv->cs = i;
-			sprintf(txx9_priv->mtdname, "%s.%u",
+			txx9_priv->mtdname = kasprintf(GFP_KERNEL, "%s.%u",
 						       dev_name(&dev->dev), i);
 		} else {
 			txx9_priv->cs = -1;
-			strcpy(txx9_priv->mtdname, dev_name(&dev->dev));
+			txx9_priv->mtdname = kstrdup(dev_name(&dev->dev),
+						     GFP_KERNEL);
+		}
+		if (!txx9_priv->mtdname) {
+			kfree(txx9_priv);
+			dev_err(&dev->dev, "Unable to allocate MTD name.\n");
+			continue;
 		}
 		if (plat->wide_mask & (1 << i))
 			chip->options |= NAND_BUSWIDTH_16;
 
 		if (nand_scan(mtd, 1)) {
+			kfree(txx9_priv->mtdname);
 			kfree(txx9_priv);
 			continue;
 		}
@@ -385,6 +392,7 @@ static int __exit txx9ndfmc_remove(struct platform_device *dev)
 		kfree(drvdata->parts[i]);
 #endif
 		del_mtd_device(mtd);
+		kfree(txx9_priv->mtdname);
 		kfree(txx9_priv);
 	}
 	return 0;

drivers/mtd/onenand/omap2.c

@@ -565,7 +565,7 @@ int omap2_onenand_rephase(void)
 				      NULL, __adjust_timing);
 }
 
-static void __devexit omap2_onenand_shutdown(struct platform_device *pdev)
+static void omap2_onenand_shutdown(struct platform_device *pdev)
 {
 	struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
 
@@ -777,7 +777,7 @@ static int __devexit omap2_onenand_remove(struct platform_device *pdev)
 
 static struct platform_driver omap2_onenand_driver = {
 	.probe		= omap2_onenand_probe,
-	.remove		= omap2_onenand_remove,
+	.remove		= __devexit_p(omap2_onenand_remove),
 	.shutdown	= omap2_onenand_shutdown,
 	.driver		= {
 		.name	= DRIVER_NAME,

drivers/mtd/onenand/onenand_base.c

@@ -9,6 +9,10 @@
  *	auto-placement support, read-while load support, various fixes
  *	Copyright (C) Nokia Corporation, 2007
  *
+ *	Vishak G <vishak.g at samsung.com>, Rohit Hagargundgi <h.rohit at samsung.com>
+ *	Flex-OneNAND support
+ *	Copyright (C) Samsung Electronics, 2008
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
@@ -16,6 +20,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/delay.h>
@@ -27,6 +32,38 @@
 
 #include <asm/io.h>
 
+/* Default Flex-OneNAND boundary and lock respectively */
+static int flex_bdry[MAX_DIES * 2] = { -1, 0, -1, 0 };
+
+module_param_array(flex_bdry, int, NULL, 0400);
+MODULE_PARM_DESC(flex_bdry,	"SLC Boundary information for Flex-OneNAND"
+				"Syntax:flex_bdry=DIE_BDRY,LOCK,..."
+				"DIE_BDRY: SLC boundary of the die"
+				"LOCK: Locking information for SLC boundary"
+				"    : 0->Set boundary in unlocked status"
+				"    : 1->Set boundary in locked status");
+
+/**
+ *  onenand_oob_128 - oob info for Flex-Onenand with 4KB page
+ *  For now, we expose only 64 out of 80 ecc bytes
+ */
+static struct nand_ecclayout onenand_oob_128 = {
+	.eccbytes	= 64,
+	.eccpos		= {
+		6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+		22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+		38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+		54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+		70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
+		86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
+		102, 103, 104, 105
+		},
+	.oobfree	= {
+		{2, 4}, {18, 4}, {34, 4}, {50, 4},
+		{66, 4}, {82, 4}, {98, 4}, {114, 4}
+	}
+};
+
 /**
  * onenand_oob_64 - oob info for large (2KB) page
  */
@@ -65,6 +102,14 @@ static const unsigned char ffchars[] = {
 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 48 */
 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 64 */
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 80 */
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 96 */
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 112 */
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,	/* 128 */
 };
 
 /**
@@ -170,6 +215,70 @@ static int onenand_buffer_address(int dataram1, int sectors, int count)
 	return ((bsa << ONENAND_BSA_SHIFT) | bsc);
 }
 
+/**
+ * flexonenand_block- For given address return block number
+ * @param this         - OneNAND device structure
+ * @param addr		- Address for which block number is needed
+ */
+static unsigned flexonenand_block(struct onenand_chip *this, loff_t addr)
+{
+	unsigned boundary, blk, die = 0;
+
+	if (ONENAND_IS_DDP(this) && addr >= this->diesize[0]) {
+		die = 1;
+		addr -= this->diesize[0];
+	}
+
+	boundary = this->boundary[die];
+
+	blk = addr >> (this->erase_shift - 1);
+	if (blk > boundary)
+		blk = (blk + boundary + 1) >> 1;
+
+	blk += die ? this->density_mask : 0;
+	return blk;
+}
+
+inline unsigned onenand_block(struct onenand_chip *this, loff_t addr)
+{
+	if (!FLEXONENAND(this))
+		return addr >> this->erase_shift;
+	return flexonenand_block(this, addr);
+}
+
+/**
+ * flexonenand_addr - Return address of the block
+ * @this:		OneNAND device structure
+ * @block:		Block number on Flex-OneNAND
+ *
+ * Return address of the block
+ */
+static loff_t flexonenand_addr(struct onenand_chip *this, int block)
+{
+	loff_t ofs = 0;
+	int die = 0, boundary;
+
+	if (ONENAND_IS_DDP(this) && block >= this->density_mask) {
+		block -= this->density_mask;
+		die = 1;
+		ofs = this->diesize[0];
+	}
+
+	boundary = this->boundary[die];
+	ofs += (loff_t)block << (this->erase_shift - 1);
+	if (block > (boundary + 1))
+		ofs += (loff_t)(block - boundary - 1) << (this->erase_shift - 1);
+	return ofs;
+}
+
+loff_t onenand_addr(struct onenand_chip *this, int block)
+{
+	if (!FLEXONENAND(this))
+		return (loff_t)block << this->erase_shift;
+	return flexonenand_addr(this, block);
+}
+EXPORT_SYMBOL(onenand_addr);
+
 /**
  * onenand_get_density - [DEFAULT] Get OneNAND density
  * @param dev_id	OneNAND device ID
@@ -182,6 +291,22 @@ static inline int onenand_get_density(int dev_id)
 	return (density & ONENAND_DEVICE_DENSITY_MASK);
 }
 
+/**
+ * flexonenand_region - [Flex-OneNAND] Return erase region of addr
+ * @param mtd		MTD device structure
+ * @param addr		address whose erase region needs to be identified
+ */
+int flexonenand_region(struct mtd_info *mtd, loff_t addr)
+{
+	int i;
+
+	for (i = 0; i < mtd->numeraseregions; i++)
+		if (addr < mtd->eraseregions[i].offset)
+			break;
+	return i - 1;
+}
+EXPORT_SYMBOL(flexonenand_region);
+
 /**
  * onenand_command - [DEFAULT] Send command to OneNAND device
  * @param mtd		MTD device structure
@@ -207,16 +332,28 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
 		page = -1;
 		break;
 
+	case FLEXONENAND_CMD_PI_ACCESS:
+		/* addr contains die index */
+		block = addr * this->density_mask;
+		page = -1;
+		break;
+
 	case ONENAND_CMD_ERASE:
 	case ONENAND_CMD_BUFFERRAM:
 	case ONENAND_CMD_OTP_ACCESS:
-		block = (int) (addr >> this->erase_shift);
+		block = onenand_block(this, addr);
 		page = -1;
 		break;
 
+	case FLEXONENAND_CMD_READ_PI:
+		cmd = ONENAND_CMD_READ;
+		block = addr * this->density_mask;
+		page = 0;
+		break;
+
 	default:
-		block = (int) (addr >> this->erase_shift);
-		page = (int) (addr >> this->page_shift);
+		block = onenand_block(this, addr);
+		page = (int) (addr - onenand_addr(this, block)) >> this->page_shift;
 
 		if (ONENAND_IS_2PLANE(this)) {
 			/* Make the even block number */
@@ -236,7 +373,7 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
 		value = onenand_bufferram_address(this, block);
 		this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
 
-		if (ONENAND_IS_2PLANE(this))
+		if (ONENAND_IS_MLC(this) || ONENAND_IS_2PLANE(this))
 			/* It is always BufferRAM0 */
 			ONENAND_SET_BUFFERRAM0(this);
 		else
@@ -258,12 +395,17 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
 
 	if (page != -1) {
 		/* Now we use page size operation */
-		int sectors = 4, count = 4;
+		int sectors = 0, count = 0;
 		int dataram;
 
 		switch (cmd) {
+		case FLEXONENAND_CMD_RECOVER_LSB:
 		case ONENAND_CMD_READ:
 		case ONENAND_CMD_READOOB:
+			if (ONENAND_IS_MLC(this))
+				/* It is always BufferRAM0 */
+				dataram = ONENAND_SET_BUFFERRAM0(this);
+			else
 				dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
 			break;
 
@@ -292,6 +434,30 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
 	return 0;
 }
 
+/**
+ * onenand_read_ecc - return ecc status
+ * @param this		onenand chip structure
+ */
+static inline int onenand_read_ecc(struct onenand_chip *this)
+{
+	int ecc, i, result = 0;
+
+	if (!FLEXONENAND(this))
+		return this->read_word(this->base + ONENAND_REG_ECC_STATUS);
+
+	for (i = 0; i < 4; i++) {
+		ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS + i);
+		if (likely(!ecc))
+			continue;
+		if (ecc & FLEXONENAND_UNCORRECTABLE_ERROR)
+			return ONENAND_ECC_2BIT_ALL;
+		else
+			result = ONENAND_ECC_1BIT_ALL;
+	}
+
+	return result;
+}
+
 /**
  * onenand_wait - [DEFAULT] wait until the command is done
  * @param mtd		MTD device structure
@@ -331,14 +497,14 @@ static int onenand_wait(struct mtd_info *mtd, int state)
 	 * power off recovery (POR) test, it should read ECC status first
 	 */
 	if (interrupt & ONENAND_INT_READ) {
-		int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
+		int ecc = onenand_read_ecc(this);
 		if (ecc) {
 			if (ecc & ONENAND_ECC_2BIT_ALL) {
 				printk(KERN_ERR "onenand_wait: ECC error = 0x%04x\n", ecc);
 				mtd->ecc_stats.failed++;
 				return -EBADMSG;
 			} else if (ecc & ONENAND_ECC_1BIT_ALL) {
-				printk(KERN_INFO "onenand_wait: correctable ECC error = 0x%04x\n", ecc);
+				printk(KERN_DEBUG "onenand_wait: correctable ECC error = 0x%04x\n", ecc);
 				mtd->ecc_stats.corrected++;
 			}
 		}
@@ -656,7 +822,7 @@ static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
 
 	if (found && ONENAND_IS_DDP(this)) {
 		/* Select DataRAM for DDP */
-		int block = (int) (addr >> this->erase_shift);
+		int block = onenand_block(this, addr);
 		int value = onenand_bufferram_address(this, block);
 		this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
 	}
@@ -815,6 +981,149 @@ static int onenand_transfer_auto_oob(struct mtd_info *mtd, uint8_t *buf, int col
 	return 0;
 }
 
+/**
+ * onenand_recover_lsb - [Flex-OneNAND] Recover LSB page data
+ * @param mtd		MTD device structure
+ * @param addr		address to recover
+ * @param status	return value from onenand_wait / onenand_bbt_wait
+ *
+ * MLC NAND Flash cell has paired pages - LSB page and MSB page. LSB page has
+ * lower page address and MSB page has higher page address in paired pages.
+ * If power off occurs during MSB page program, the paired LSB page data can
+ * become corrupt. LSB page recovery read is a way to read LSB page though page
+ * data are corrupted. When uncorrectable error occurs as a result of LSB page
+ * read after power up, issue LSB page recovery read.
+ */
+static int onenand_recover_lsb(struct mtd_info *mtd, loff_t addr, int status)
+{
+	struct onenand_chip *this = mtd->priv;
+	int i;
+
+	/* Recovery is only for Flex-OneNAND */
+	if (!FLEXONENAND(this))
+		return status;
+
+	/* check if we failed due to uncorrectable error */
+	if (status != -EBADMSG && status != ONENAND_BBT_READ_ECC_ERROR)
+		return status;
+
+	/* check if address lies in MLC region */
+	i = flexonenand_region(mtd, addr);
+	if (mtd->eraseregions[i].erasesize < (1 << this->erase_shift))
+		return status;
+
+	/* We are attempting to reread, so decrement stats.failed
+	 * which was incremented by onenand_wait due to read failure
+	 */
+	printk(KERN_INFO "onenand_recover_lsb: Attempting to recover from uncorrectable read\n");
+	mtd->ecc_stats.failed--;
+
+	/* Issue the LSB page recovery command */
+	this->command(mtd, FLEXONENAND_CMD_RECOVER_LSB, addr, this->writesize);
+	return this->wait(mtd, FL_READING);
+}
+
+/**
+ * onenand_mlc_read_ops_nolock - MLC OneNAND read main and/or out-of-band
+ * @param mtd		MTD device structure
+ * @param from		offset to read from
+ * @param ops:		oob operation description structure
+ *
+ * MLC OneNAND / Flex-OneNAND has 4KB page size and 4KB dataram.
+ * So, read-while-load is not present.
+ */
+static int onenand_mlc_read_ops_nolock(struct mtd_info *mtd, loff_t from,
+				struct mtd_oob_ops *ops)
+{
+	struct onenand_chip *this = mtd->priv;
+	struct mtd_ecc_stats stats;
+	size_t len = ops->len;
+	size_t ooblen = ops->ooblen;
+	u_char *buf = ops->datbuf;
+	u_char *oobbuf = ops->oobbuf;
+	int read = 0, column, thislen;
+	int oobread = 0, oobcolumn, thisooblen, oobsize;
+	int ret = 0;
+	int writesize = this->writesize;
+
+	DEBUG(MTD_DEBUG_LEVEL3, "onenand_mlc_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+
+	if (ops->mode == MTD_OOB_AUTO)
+		oobsize = this->ecclayout->oobavail;
+	else
+		oobsize = mtd->oobsize;
+
+	oobcolumn = from & (mtd->oobsize - 1);
+
+	/* Do not allow reads past end of device */
+	if (from + len > mtd->size) {
+		printk(KERN_ERR "onenand_mlc_read_ops_nolock: Attempt read beyond end of device\n");
+		ops->retlen = 0;
+		ops->oobretlen = 0;
+		return -EINVAL;
+	}
+
+	stats = mtd->ecc_stats;
+
+	while (read < len) {
+		cond_resched();
+
+		thislen = min_t(int, writesize, len - read);
+
+		column = from & (writesize - 1);
+		if (column + thislen > writesize)
+			thislen = writesize - column;
+
+		if (!onenand_check_bufferram(mtd, from)) {
+			this->command(mtd, ONENAND_CMD_READ, from, writesize);
+
+			ret = this->wait(mtd, FL_READING);
+			if (unlikely(ret))
+				ret = onenand_recover_lsb(mtd, from, ret);
+			onenand_update_bufferram(mtd, from, !ret);
+			if (ret == -EBADMSG)
+				ret = 0;
+		}
+
+		this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
+		if (oobbuf) {
+			thisooblen = oobsize - oobcolumn;
+			thisooblen = min_t(int, thisooblen, ooblen - oobread);
+
+			if (ops->mode == MTD_OOB_AUTO)
+				onenand_transfer_auto_oob(mtd, oobbuf, oobcolumn, thisooblen);
+			else
+				this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, oobcolumn, thisooblen);
+			oobread += thisooblen;
+			oobbuf += thisooblen;
+			oobcolumn = 0;
+		}
+
+		read += thislen;
+		if (read == len)
+			break;
+
+		from += thislen;
+		buf += thislen;
+	}
+
+	/*
+	 * Return success, if no ECC failures, else -EBADMSG
+	 * fs driver will take care of that, because
+	 * retlen == desired len and result == -EBADMSG
+	 */
+	ops->retlen = read;
+	ops->oobretlen = oobread;
+
+	if (ret)
+		return ret;
+
+	if (mtd->ecc_stats.failed - stats.failed)
+		return -EBADMSG;
+
+	return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
+}
+
 /**
  * onenand_read_ops_nolock - [OneNAND Interface] OneNAND read main and/or out-of-band
  * @param mtd		MTD device structure
@@ -962,7 +1271,7 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
 	size_t len = ops->ooblen;
 	mtd_oob_mode_t mode = ops->mode;
 	u_char *buf = ops->oobbuf;
-	int ret = 0;
+	int ret = 0, readcmd;
 
 	from += ops->ooboffs;
 
@@ -993,17 +1302,22 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
 
 	stats = mtd->ecc_stats;
 
+	readcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_READ : ONENAND_CMD_READOOB;
+
 	while (read < len) {
 		cond_resched();
 
 		thislen = oobsize - column;
 		thislen = min_t(int, thislen, len);
 
-		this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
+		this->command(mtd, readcmd, from, mtd->oobsize);
 
 		onenand_update_bufferram(mtd, from, 0);
 
 		ret = this->wait(mtd, FL_READING);
+		if (unlikely(ret))
+			ret = onenand_recover_lsb(mtd, from, ret);
+
 		if (ret && ret != -EBADMSG) {
 			printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
 			break;
@@ -1053,6 +1367,7 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
 static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
 	size_t *retlen, u_char *buf)
 {
+	struct onenand_chip *this = mtd->priv;
 	struct mtd_oob_ops ops = {
 		.len	= len,
 		.ooblen	= 0,
@@ -1062,7 +1377,9 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
 	int ret;
 
 	onenand_get_device(mtd, FL_READING);
-	ret = onenand_read_ops_nolock(mtd, from, &ops);
+	ret = ONENAND_IS_MLC(this) ?
+		onenand_mlc_read_ops_nolock(mtd, from, &ops) :
+		onenand_read_ops_nolock(mtd, from, &ops);
 	onenand_release_device(mtd);
 
 	*retlen = ops.retlen;
@@ -1080,6 +1397,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
 static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
 			    struct mtd_oob_ops *ops)
 {
+	struct onenand_chip *this = mtd->priv;
 	int ret;
 
 	switch (ops->mode) {
@@ -1094,7 +1412,9 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
 
 	onenand_get_device(mtd, FL_READING);
 	if (ops->datbuf)
-		ret = onenand_read_ops_nolock(mtd, from, ops);
+		ret = ONENAND_IS_MLC(this) ?
+			onenand_mlc_read_ops_nolock(mtd, from, ops) :
+			onenand_read_ops_nolock(mtd, from, ops);
 	else
 		ret = onenand_read_oob_nolock(mtd, from, ops);
 	onenand_release_device(mtd);
@@ -1128,11 +1448,11 @@ static int onenand_bbt_wait(struct mtd_info *mtd, int state)
 	ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
 
 	if (interrupt & ONENAND_INT_READ) {
-		int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
+		int ecc = onenand_read_ecc(this);
 		if (ecc & ONENAND_ECC_2BIT_ALL) {
 			printk(KERN_INFO "onenand_bbt_wait: ecc error = 0x%04x"
 				", controller error 0x%04x\n", ecc, ctrl);
-			return ONENAND_BBT_READ_ERROR;
+			return ONENAND_BBT_READ_ECC_ERROR;
 		}
 	} else {
 		printk(KERN_ERR "onenand_bbt_wait: read timeout!"
@@ -1163,7 +1483,7 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 {
 	struct onenand_chip *this = mtd->priv;
 	int read = 0, thislen, column;
-	int ret = 0;
+	int ret = 0, readcmd;
 	size_t len = ops->ooblen;
 	u_char *buf = ops->oobbuf;
 
@@ -1183,17 +1503,22 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 
 	column = from & (mtd->oobsize - 1);
 
+	readcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_READ : ONENAND_CMD_READOOB;
+
 	while (read < len) {
 		cond_resched();
 
 		thislen = mtd->oobsize - column;
 		thislen = min_t(int, thislen, len);
 
-		this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
+		this->command(mtd, readcmd, from, mtd->oobsize);
 
 		onenand_update_bufferram(mtd, from, 0);
 
-		ret = onenand_bbt_wait(mtd, FL_READING);
+		ret = this->bbt_wait(mtd, FL_READING);
+		if (unlikely(ret))
+			ret = onenand_recover_lsb(mtd, from, ret);
+
 		if (ret)
 			break;
 
@@ -1230,9 +1555,11 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to
 {
 	struct onenand_chip *this = mtd->priv;
 	u_char *oob_buf = this->oob_buf;
-	int status, i;
+	int status, i, readcmd;
 
-	this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
+	readcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_READ : ONENAND_CMD_READOOB;
+
+	this->command(mtd, readcmd, to, mtd->oobsize);
 	onenand_update_bufferram(mtd, to, 0);
 	status = this->wait(mtd, FL_READING);
 	if (status)
@@ -1633,7 +1960,7 @@ static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
 {
 	struct onenand_chip *this = mtd->priv;
 	int column, ret = 0, oobsize;
-	int written = 0;
+	int written = 0, oobcmd;
 	u_char *oobbuf;
 	size_t len = ops->ooblen;
 	const u_char *buf = ops->oobbuf;
@@ -1675,6 +2002,8 @@ static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
 
 	oobbuf = this->oob_buf;
 
+	oobcmd = ONENAND_IS_MLC(this) ? ONENAND_CMD_PROG : ONENAND_CMD_PROGOOB;
+
 	/* Loop until all data write */
 	while (written < len) {
 		int thislen = min_t(int, oobsize, len - written);
@@ -1692,7 +2021,14 @@ static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
 			memcpy(oobbuf + column, buf, thislen);
 		this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
 
-		this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
+		if (ONENAND_IS_MLC(this)) {
+			/* Set main area of DataRAM to 0xff*/
+			memset(this->page_buf, 0xff, mtd->writesize);
+			this->write_bufferram(mtd, ONENAND_DATARAM,
+					 this->page_buf, 0, mtd->writesize);
+		}
+
+		this->command(mtd, oobcmd, to, mtd->oobsize);
 
 		onenand_update_bufferram(mtd, to, 0);
 		if (ONENAND_IS_2PLANE(this)) {
@@ -1815,29 +2151,48 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
 {
 	struct onenand_chip *this = mtd->priv;
 	unsigned int block_size;
-	loff_t addr;
-	int len;
-	int ret = 0;
+	loff_t addr = instr->addr;
+	loff_t len = instr->len;
+	int ret = 0, i;
+	struct mtd_erase_region_info *region = NULL;
+	loff_t region_end = 0;
 
 	DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%012llx, len = %llu\n", (unsigned long long) instr->addr, (unsigned long long) instr->len);
 
-	block_size = (1 << this->erase_shift);
+	/* Do not allow erase past end of device */
+	if (unlikely((len + addr) > mtd->size)) {
+		printk(KERN_ERR "onenand_erase: Erase past end of device\n");
+		return -EINVAL;
+	}
 
-	/* Start address must align on block boundary */
-	if (unlikely(instr->addr & (block_size - 1))) {
+	if (FLEXONENAND(this)) {
+		/* Find the eraseregion of this address */
+		i = flexonenand_region(mtd, addr);
+		region = &mtd->eraseregions[i];
+
+		block_size = region->erasesize;
+		region_end = region->offset + region->erasesize * region->numblocks;
+
+		/* Start address within region must align on block boundary.
+		 * Erase region's start offset is always block start address.
+		 */
+		if (unlikely((addr - region->offset) & (block_size - 1))) {
 			printk(KERN_ERR "onenand_erase: Unaligned address\n");
 			return -EINVAL;
 		}
+	} else {
+		block_size = 1 << this->erase_shift;
 
-	/* Length must align on block boundary */
-	if (unlikely(instr->len & (block_size - 1))) {
-		printk(KERN_ERR "onenand_erase: Length not block aligned\n");
+		/* Start address must align on block boundary */
+		if (unlikely(addr & (block_size - 1))) {
+			printk(KERN_ERR "onenand_erase: Unaligned address\n");
 			return -EINVAL;
 		}
+	}
 
-	/* Do not allow erase past end of device */
-	if (unlikely((instr->len + instr->addr) > mtd->size)) {
-		printk(KERN_ERR "onenand_erase: Erase past end of device\n");
+	/* Length must align on block boundary */
+	if (unlikely(len & (block_size - 1))) {
+		printk(KERN_ERR "onenand_erase: Length not block aligned\n");
 		return -EINVAL;
 	}
 
@@ -1847,9 +2202,6 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
 	onenand_get_device(mtd, FL_ERASING);
 
 	/* Loop throught the pages */
-	len = instr->len;
-	addr = instr->addr;
-
 	instr->state = MTD_ERASING;
 
 	while (len) {
@@ -1869,7 +2221,8 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
 		ret = this->wait(mtd, FL_ERASING);
 		/* Check, if it is write protected */
 		if (ret) {
-			printk(KERN_ERR "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift));
+			printk(KERN_ERR "onenand_erase: Failed erase, block %d\n",
+						 onenand_block(this, addr));
 			instr->state = MTD_ERASE_FAILED;
 			instr->fail_addr = addr;
 			goto erase_exit;
@@ -1877,6 +2230,22 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
 
 		len -= block_size;
 		addr += block_size;
+
+		if (addr == region_end) {
+			if (!len)
+				break;
+			region++;
+
+			block_size = region->erasesize;
+			region_end = region->offset + region->erasesize * region->numblocks;
+
+			if (len & (block_size - 1)) {
+				/* FIXME: This should be handled at MTD partitioning level. */
+				printk(KERN_ERR "onenand_erase: Unaligned address\n");
+				goto erase_exit;
+			}
+		}
+
 	}
 
 	instr->state = MTD_ERASE_DONE;
@@ -1955,12 +2324,16 @@ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
 	int block;
 
 	/* Get block number */
-	block = ((int) ofs) >> bbm->bbt_erase_shift;
+	block = onenand_block(this, ofs);
         if (bbm->bbt)
                 bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
 
         /* We write two bytes, so we dont have to mess with 16 bit access */
         ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
+	/* FIXME : What to do when marking SLC block in partition
+	 * 	   with MLC erasesize? For now, it is not advisable to
+	 *	   create partitions containing both SLC and MLC regions.
+	 */
 	return onenand_write_oob_nolock(mtd, ofs, &ops);
 }
 
@@ -2005,8 +2378,8 @@ static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int
 	int start, end, block, value, status;
 	int wp_status_mask;
 
-	start = ofs >> this->erase_shift;
-	end = len >> this->erase_shift;
+	start = onenand_block(this, ofs);
+	end = onenand_block(this, ofs + len) - 1;
 
 	if (cmd == ONENAND_CMD_LOCK)
 		wp_status_mask = ONENAND_WP_LS;
@@ -2018,7 +2391,7 @@ static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int
 		/* Set start block address */
 		this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
 		/* Set end block address */
-		this->write_word(start + end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
+		this->write_word(end, this->base +  ONENAND_REG_END_BLOCK_ADDRESS);
 		/* Write lock command */
 		this->command(mtd, cmd, 0, 0);
 
@@ -2039,7 +2412,7 @@ static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int
 	}
 
 	/* Block lock scheme */
-	for (block = start; block < start + end; block++) {
+	for (block = start; block < end + 1; block++) {
 		/* Set block address */
 		value = onenand_block_address(this, block);
 		this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
@@ -2147,7 +2520,7 @@ static void onenand_unlock_all(struct mtd_info *mtd)
 {
 	struct onenand_chip *this = mtd->priv;
 	loff_t ofs = 0;
-	size_t len = this->chipsize;
+	loff_t len = mtd->size;
 
 	if (this->options & ONENAND_HAS_UNLOCK_ALL) {
 		/* Set start block address */
@@ -2163,12 +2536,16 @@ static void onenand_unlock_all(struct mtd_info *mtd)
 		    & ONENAND_CTRL_ONGO)
 			continue;
 
+		/* Don't check lock status */
+		if (this->options & ONENAND_SKIP_UNLOCK_CHECK)
+			return;
+
 		/* Check lock status */
 		if (onenand_check_lock_status(this))
 			return;
 
 		/* Workaround for all block unlock in DDP */
-		if (ONENAND_IS_DDP(this)) {
+		if (ONENAND_IS_DDP(this) && !FLEXONENAND(this)) {
 			/* All blocks on another chip */
 			ofs = this->chipsize >> 1;
 			len = this->chipsize >> 1;
@@ -2210,7 +2587,9 @@ static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len,
 	this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
 	this->wait(mtd, FL_OTPING);
 
-	ret = onenand_read_ops_nolock(mtd, from, &ops);
+	ret = ONENAND_IS_MLC(this) ?
+		onenand_mlc_read_ops_nolock(mtd, from, &ops) :
+		onenand_read_ops_nolock(mtd, from, &ops);
 
 	/* Exit OTP access mode */
 	this->command(mtd, ONENAND_CMD_RESET, 0, 0);
@@ -2277,21 +2656,32 @@ static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len,
 		size_t *retlen, u_char *buf)
 {
 	struct onenand_chip *this = mtd->priv;
-	struct mtd_oob_ops ops = {
-		.mode = MTD_OOB_PLACE,
-		.ooblen = len,
-		.oobbuf = buf,
-		.ooboffs = 0,
-	};
+	struct mtd_oob_ops ops;
 	int ret;
 
 	/* Enter OTP access mode */
 	this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
 	this->wait(mtd, FL_OTPING);
 
+	if (FLEXONENAND(this)) {
+		/*
+		 * For Flex-OneNAND, we write lock mark to 1st word of sector 4 of
+		 * main area of page 49.
+		 */
+		ops.len = mtd->writesize;
+		ops.ooblen = 0;
+		ops.datbuf = buf;
+		ops.oobbuf = NULL;
+		ret = onenand_write_ops_nolock(mtd, mtd->writesize * 49, &ops);
+		*retlen = ops.retlen;
+	} else {
+		ops.mode = MTD_OOB_PLACE;
+		ops.ooblen = len;
+		ops.oobbuf = buf;
+		ops.ooboffs = 0;
 		ret = onenand_write_oob_nolock(mtd, from, &ops);
-
 		*retlen = ops.oobretlen;
+	}
 
 	/* Exit OTP access mode */
 	this->command(mtd, ONENAND_CMD_RESET, 0, 0);
@@ -2475,27 +2865,34 @@ static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
 			size_t len)
 {
 	struct onenand_chip *this = mtd->priv;
-	u_char *oob_buf = this->oob_buf;
+	u_char *buf = FLEXONENAND(this) ? this->page_buf : this->oob_buf;
 	size_t retlen;
 	int ret;
 
-	memset(oob_buf, 0xff, mtd->oobsize);
+	memset(buf, 0xff, FLEXONENAND(this) ? this->writesize
+						 : mtd->oobsize);
 	/*
 	 * Note: OTP lock operation
 	 *       OTP block : 0xXXFC
 	 *       1st block : 0xXXF3 (If chip support)
 	 *       Both      : 0xXXF0 (If chip support)
 	 */
-	oob_buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC;
+	if (FLEXONENAND(this))
+		buf[FLEXONENAND_OTP_LOCK_OFFSET] = 0xFC;
+	else
+		buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC;
 
 	/*
 	 * Write lock mark to 8th word of sector0 of page0 of the spare0.
 	 * We write 16 bytes spare area instead of 2 bytes.
+	 * For Flex-OneNAND, we write lock mark to 1st word of sector 4 of
+	 * main area of page 49.
 	 */
+
 	from = 0;
-	len = 16;
+	len = FLEXONENAND(this) ? mtd->writesize : 16;
 
-	ret = onenand_otp_walk(mtd, from, len, &retlen, oob_buf, do_otp_lock, MTD_OTP_USER);
+	ret = onenand_otp_walk(mtd, from, len, &retlen, buf, do_otp_lock, MTD_OTP_USER);
 
 	return ret ? : retlen;
 }
@@ -2542,6 +2939,14 @@ static void onenand_check_features(struct mtd_info *mtd)
 		break;
 	}
 
+	if (ONENAND_IS_MLC(this))
+		this->options &= ~ONENAND_HAS_2PLANE;
+
+	if (FLEXONENAND(this)) {
+		this->options &= ~ONENAND_HAS_CONT_LOCK;
+		this->options |= ONENAND_HAS_UNLOCK_ALL;
+	}
+
 	if (this->options & ONENAND_HAS_CONT_LOCK)
 		printk(KERN_DEBUG "Lock scheme is Continuous Lock\n");
 	if (this->options & ONENAND_HAS_UNLOCK_ALL)
@@ -2559,14 +2964,16 @@ static void onenand_check_features(struct mtd_info *mtd)
  */
 static void onenand_print_device_info(int device, int version)
 {
-        int vcc, demuxed, ddp, density;
+	int vcc, demuxed, ddp, density, flexonenand;
 
         vcc = device & ONENAND_DEVICE_VCC_MASK;
         demuxed = device & ONENAND_DEVICE_IS_DEMUX;
         ddp = device & ONENAND_DEVICE_IS_DDP;
         density = onenand_get_density(device);
-        printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n",
+	flexonenand = device & DEVICE_IS_FLEXONENAND;
+	printk(KERN_INFO "%s%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n",
 		demuxed ? "" : "Muxed ",
+		flexonenand ? "Flex-" : "",
                 ddp ? "(DDP)" : "",
                 (16 << density),
                 vcc ? "2.65/3.3" : "1.8",
@@ -2576,6 +2983,7 @@ static void onenand_print_device_info(int device, int version)
 
 static const struct onenand_manufacturers onenand_manuf_ids[] = {
         {ONENAND_MFR_SAMSUNG, "Samsung"},
+	{ONENAND_MFR_NUMONYX, "Numonyx"},
 };
 
 /**
@@ -2604,6 +3012,261 @@ static int onenand_check_maf(int manuf)
 	return (i == size);
 }
 
+/**
+* flexonenand_get_boundary	- Reads the SLC boundary
+* @param onenand_info		- onenand info structure
+**/
+static int flexonenand_get_boundary(struct mtd_info *mtd)
+{
+	struct onenand_chip *this = mtd->priv;
+	unsigned die, bdry;
+	int ret, syscfg, locked;
+
+	/* Disable ECC */
+	syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
+	this->write_word((syscfg | 0x0100), this->base + ONENAND_REG_SYS_CFG1);
+
+	for (die = 0; die < this->dies; die++) {
+		this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
+		this->wait(mtd, FL_SYNCING);
+
+		this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
+		ret = this->wait(mtd, FL_READING);
+
+		bdry = this->read_word(this->base + ONENAND_DATARAM);
+		if ((bdry >> FLEXONENAND_PI_UNLOCK_SHIFT) == 3)
+			locked = 0;
+		else
+			locked = 1;
+		this->boundary[die] = bdry & FLEXONENAND_PI_MASK;
+
+		this->command(mtd, ONENAND_CMD_RESET, 0, 0);
+		ret = this->wait(mtd, FL_RESETING);
+
+		printk(KERN_INFO "Die %d boundary: %d%s\n", die,
+		       this->boundary[die], locked ? "(Locked)" : "(Unlocked)");
+	}
+
+	/* Enable ECC */
+	this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
+	return 0;
+}
+
+/**
+ * flexonenand_get_size - Fill up fields in onenand_chip and mtd_info
+ * 			  boundary[], diesize[], mtd->size, mtd->erasesize
+ * @param mtd		- MTD device structure
+ */
+static void flexonenand_get_size(struct mtd_info *mtd)
+{
+	struct onenand_chip *this = mtd->priv;
+	int die, i, eraseshift, density;
+	int blksperdie, maxbdry;
+	loff_t ofs;
+
+	density = onenand_get_density(this->device_id);
+	blksperdie = ((loff_t)(16 << density) << 20) >> (this->erase_shift);
+	blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
+	maxbdry = blksperdie - 1;
+	eraseshift = this->erase_shift - 1;
+
+	mtd->numeraseregions = this->dies << 1;
+
+	/* This fills up the device boundary */
+	flexonenand_get_boundary(mtd);
+	die = ofs = 0;
+	i = -1;
+	for (; die < this->dies; die++) {
+		if (!die || this->boundary[die-1] != maxbdry) {
+			i++;
+			mtd->eraseregions[i].offset = ofs;
+			mtd->eraseregions[i].erasesize = 1 << eraseshift;
+			mtd->eraseregions[i].numblocks =
+							this->boundary[die] + 1;
+			ofs += mtd->eraseregions[i].numblocks << eraseshift;
+			eraseshift++;
+		} else {
+			mtd->numeraseregions -= 1;
+			mtd->eraseregions[i].numblocks +=
+							this->boundary[die] + 1;
+			ofs += (this->boundary[die] + 1) << (eraseshift - 1);
+		}
+		if (this->boundary[die] != maxbdry) {
+			i++;
+			mtd->eraseregions[i].offset = ofs;
+			mtd->eraseregions[i].erasesize = 1 << eraseshift;
+			mtd->eraseregions[i].numblocks = maxbdry ^
+							 this->boundary[die];
+			ofs += mtd->eraseregions[i].numblocks << eraseshift;
+			eraseshift--;
+		} else
+			mtd->numeraseregions -= 1;
+	}
+
+	/* Expose MLC erase size except when all blocks are SLC */
+	mtd->erasesize = 1 << this->erase_shift;
+	if (mtd->numeraseregions == 1)
+		mtd->erasesize >>= 1;
+
+	printk(KERN_INFO "Device has %d eraseregions\n", mtd->numeraseregions);
+	for (i = 0; i < mtd->numeraseregions; i++)
+		printk(KERN_INFO "[offset: 0x%08x, erasesize: 0x%05x,"
+			" numblocks: %04u]\n",
+			(unsigned int) mtd->eraseregions[i].offset,
+			mtd->eraseregions[i].erasesize,
+			mtd->eraseregions[i].numblocks);
+
+	for (die = 0, mtd->size = 0; die < this->dies; die++) {
+		this->diesize[die] = (loff_t)blksperdie << this->erase_shift;
+		this->diesize[die] -= (loff_t)(this->boundary[die] + 1)
+						 << (this->erase_shift - 1);
+		mtd->size += this->diesize[die];
+	}
+}
+
+/**
+ * flexonenand_check_blocks_erased - Check if blocks are erased
+ * @param mtd_info	- mtd info structure
+ * @param start		- first erase block to check
+ * @param end		- last erase block to check
+ *
+ * Converting an unerased block from MLC to SLC
+ * causes byte values to change. Since both data and its ECC
+ * have changed, reads on the block give uncorrectable error.
+ * This might lead to the block being detected as bad.
+ *
+ * Avoid this by ensuring that the block to be converted is
+ * erased.
+ */
+static int flexonenand_check_blocks_erased(struct mtd_info *mtd, int start, int end)
+{
+	struct onenand_chip *this = mtd->priv;
+	int i, ret;
+	int block;
+	struct mtd_oob_ops ops = {
+		.mode = MTD_OOB_PLACE,
+		.ooboffs = 0,
+		.ooblen	= mtd->oobsize,
+		.datbuf	= NULL,
+		.oobbuf	= this->oob_buf,
+	};
+	loff_t addr;
+
+	printk(KERN_DEBUG "Check blocks from %d to %d\n", start, end);
+
+	for (block = start; block <= end; block++) {
+		addr = flexonenand_addr(this, block);
+		if (onenand_block_isbad_nolock(mtd, addr, 0))
+			continue;
+
+		/*
+		 * Since main area write results in ECC write to spare,
+		 * it is sufficient to check only ECC bytes for change.
+		 */
+		ret = onenand_read_oob_nolock(mtd, addr, &ops);
+		if (ret)
+			return ret;
+
+		for (i = 0; i < mtd->oobsize; i++)
+			if (this->oob_buf[i] != 0xff)
+				break;
+
+		if (i != mtd->oobsize) {
+			printk(KERN_WARNING "Block %d not erased.\n", block);
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * flexonenand_set_boundary	- Writes the SLC boundary
+ * @param mtd			- mtd info structure
+ */
+int flexonenand_set_boundary(struct mtd_info *mtd, int die,
+				    int boundary, int lock)
+{
+	struct onenand_chip *this = mtd->priv;
+	int ret, density, blksperdie, old, new, thisboundary;
+	loff_t addr;
+
+	/* Change only once for SDP Flex-OneNAND */
+	if (die && (!ONENAND_IS_DDP(this)))
+		return 0;
+
+	/* boundary value of -1 indicates no required change */
+	if (boundary < 0 || boundary == this->boundary[die])
+		return 0;
+
+	density = onenand_get_density(this->device_id);
+	blksperdie = ((16 << density) << 20) >> this->erase_shift;
+	blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
+
+	if (boundary >= blksperdie) {
+		printk(KERN_ERR "flexonenand_set_boundary: Invalid boundary value. "
+				"Boundary not changed.\n");
+		return -EINVAL;
+	}
+
+	/* Check if converting blocks are erased */
+	old = this->boundary[die] + (die * this->density_mask);
+	new = boundary + (die * this->density_mask);
+	ret = flexonenand_check_blocks_erased(mtd, min(old, new) + 1, max(old, new));
+	if (ret) {
+		printk(KERN_ERR "flexonenand_set_boundary: Please erase blocks before boundary change\n");
+		return ret;
+	}
+
+	this->command(mtd, FLEXONENAND_CMD_PI_ACCESS, die, 0);
+	this->wait(mtd, FL_SYNCING);
+
+	/* Check is boundary is locked */
+	this->command(mtd, FLEXONENAND_CMD_READ_PI, die, 0);
+	ret = this->wait(mtd, FL_READING);
+
+	thisboundary = this->read_word(this->base + ONENAND_DATARAM);
+	if ((thisboundary >> FLEXONENAND_PI_UNLOCK_SHIFT) != 3) {
+		printk(KERN_ERR "flexonenand_set_boundary: boundary locked\n");
+		ret = 1;
+		goto out;
+	}
+
+	printk(KERN_INFO "flexonenand_set_boundary: Changing die %d boundary: %d%s\n",
+			die, boundary, lock ? "(Locked)" : "(Unlocked)");
+
+	addr = die ? this->diesize[0] : 0;
+
+	boundary &= FLEXONENAND_PI_MASK;
+	boundary |= lock ? 0 : (3 << FLEXONENAND_PI_UNLOCK_SHIFT);
+
+	this->command(mtd, ONENAND_CMD_ERASE, addr, 0);
+	ret = this->wait(mtd, FL_ERASING);
+	if (ret) {
+		printk(KERN_ERR "flexonenand_set_boundary: Failed PI erase for Die %d\n", die);
+		goto out;
+	}
+
+	this->write_word(boundary, this->base + ONENAND_DATARAM);
+	this->command(mtd, ONENAND_CMD_PROG, addr, 0);
+	ret = this->wait(mtd, FL_WRITING);
+	if (ret) {
+		printk(KERN_ERR "flexonenand_set_boundary: Failed PI write for Die %d\n", die);
+		goto out;
+	}
+
+	this->command(mtd, FLEXONENAND_CMD_PI_UPDATE, die, 0);
+	ret = this->wait(mtd, FL_WRITING);
+out:
+	this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_REG_COMMAND);
+	this->wait(mtd, FL_RESETING);
+	if (!ret)
+		/* Recalculate device size on boundary change*/
+		flexonenand_get_size(mtd);
+
+	return ret;
+}
+
 /**
  * onenand_probe - [OneNAND Interface] Probe the OneNAND device
  * @param mtd		MTD device structure
@@ -2621,7 +3284,7 @@ static int onenand_probe(struct mtd_info *mtd)
 	/* Save system configuration 1 */
 	syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1);
 	/* Clear Sync. Burst Read mode to read BootRAM */
-	this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ), this->base + ONENAND_REG_SYS_CFG1);
+	this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE), this->base + ONENAND_REG_SYS_CFG1);
 
 	/* Send the command for reading device ID from BootRAM */
 	this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
@@ -2646,6 +3309,7 @@ static int onenand_probe(struct mtd_info *mtd)
 	maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
 	dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
 	ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
+	this->technology = this->read_word(this->base + ONENAND_REG_TECHNOLOGY);
 
 	/* Check OneNAND device */
 	if (maf_id != bram_maf_id || dev_id != bram_dev_id)
@@ -2657,28 +3321,54 @@ static int onenand_probe(struct mtd_info *mtd)
 	this->version_id = ver_id;
 
 	density = onenand_get_density(dev_id);
+	if (FLEXONENAND(this)) {
+		this->dies = ONENAND_IS_DDP(this) ? 2 : 1;
+		/* Maximum possible erase regions */
+		mtd->numeraseregions = this->dies << 1;
+		mtd->eraseregions = kzalloc(sizeof(struct mtd_erase_region_info)
+					* (this->dies << 1), GFP_KERNEL);
+		if (!mtd->eraseregions)
+			return -ENOMEM;
+	}
+
+	/*
+	 * For Flex-OneNAND, chipsize represents maximum possible device size.
+	 * mtd->size represents the actual device size.
+	 */
 	this->chipsize = (16 << density) << 20;
-	/* Set density mask. it is used for DDP */
-	if (ONENAND_IS_DDP(this))
-		this->density_mask = (1 << (density + 6));
-	else
-		this->density_mask = 0;
 
 	/* OneNAND page size & block size */
 	/* The data buffer size is equal to page size */
 	mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
+	/* We use the full BufferRAM */
+	if (ONENAND_IS_MLC(this))
+		mtd->writesize <<= 1;
+
 	mtd->oobsize = mtd->writesize >> 5;
 	/* Pages per a block are always 64 in OneNAND */
 	mtd->erasesize = mtd->writesize << 6;
+	/*
+	 * Flex-OneNAND SLC area has 64 pages per block.
+	 * Flex-OneNAND MLC area has 128 pages per block.
+	 * Expose MLC erase size to find erase_shift and page_mask.
+	 */
+	if (FLEXONENAND(this))
+		mtd->erasesize <<= 1;
 
 	this->erase_shift = ffs(mtd->erasesize) - 1;
 	this->page_shift = ffs(mtd->writesize) - 1;
 	this->page_mask = (1 << (this->erase_shift - this->page_shift)) - 1;
+	/* Set density mask. it is used for DDP */
+	if (ONENAND_IS_DDP(this))
+		this->density_mask = this->chipsize >> (this->erase_shift + 1);
 	/* It's real page size */
 	this->writesize = mtd->writesize;
 
 	/* REVIST: Multichip handling */
 
+	if (FLEXONENAND(this))
+		flexonenand_get_size(mtd);
+	else
 		mtd->size = this->chipsize;
 
 	/* Check OneNAND features */
@@ -2734,7 +3424,7 @@ static void onenand_resume(struct mtd_info *mtd)
  */
 int onenand_scan(struct mtd_info *mtd, int maxchips)
 {
-	int i;
+	int i, ret;
 	struct onenand_chip *this = mtd->priv;
 
 	if (!this->read_word)
@@ -2746,6 +3436,10 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 		this->command = onenand_command;
 	if (!this->wait)
 		onenand_setup_wait(mtd);
+	if (!this->bbt_wait)
+		this->bbt_wait = onenand_bbt_wait;
+	if (!this->unlock_all)
+		this->unlock_all = onenand_unlock_all;
 
 	if (!this->read_bufferram)
 		this->read_bufferram = onenand_read_bufferram;
@@ -2796,6 +3490,10 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 	 * Allow subpage writes up to oobsize.
 	 */
 	switch (mtd->oobsize) {
+	case 128:
+		this->ecclayout = &onenand_oob_128;
+		mtd->subpage_sft = 0;
+		break;
 	case 64:
 		this->ecclayout = &onenand_oob_64;
 		mtd->subpage_sft = 2;
@@ -2859,9 +3557,18 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
 	mtd->owner = THIS_MODULE;
 
 	/* Unlock whole block */
-	onenand_unlock_all(mtd);
+	this->unlock_all(mtd);
+
+	ret = this->scan_bbt(mtd);
+	if ((!FLEXONENAND(this)) || ret)
+		return ret;
 
-	return this->scan_bbt(mtd);
+	/* Change Flex-OneNAND boundaries if required */
+	for (i = 0; i < MAX_DIES; i++)
+		flexonenand_set_boundary(mtd, i, flex_bdry[2 * i],
+						 flex_bdry[(2 * i) + 1]);
+
+	return 0;
 }
 
 /**
@@ -2890,6 +3597,7 @@ void onenand_release(struct mtd_info *mtd)
 		kfree(this->page_buf);
 	if (this->options & ONENAND_OOBBUF_ALLOC)
 		kfree(this->oob_buf);
+	kfree(mtd->eraseregions);
 }
 
 EXPORT_SYMBOL_GPL(onenand_scan);

drivers/mtd/onenand/onenand_bbt.c

@@ -63,6 +63,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 	loff_t from;
 	size_t readlen, ooblen;
 	struct mtd_oob_ops ops;
+	int rgn;
 
 	printk(KERN_INFO "Scanning device for bad blocks\n");
 
@@ -76,7 +77,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 	/* Note that numblocks is 2 * (real numblocks) here;
 	 * see i += 2 below as it makses shifting and masking less painful
 	 */
-	numblocks = mtd->size >> (bbm->bbt_erase_shift - 1);
+	numblocks = this->chipsize >> (bbm->bbt_erase_shift - 1);
 	startblock = 0;
 	from = 0;
 
@@ -106,6 +107,11 @@ static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
 			}
 		}
 		i += 2;
+
+		if (FLEXONENAND(this)) {
+			rgn = flexonenand_region(mtd, from);
+			from += mtd->eraseregions[rgn].erasesize;
+		} else
 			from += (1 << bbm->bbt_erase_shift);
 	}
 
@@ -143,7 +149,7 @@ static int onenand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
 	uint8_t res;
 
 	/* Get block number * 2 */
-	block = (int) (offs >> (bbm->bbt_erase_shift - 1));
+	block = (int) (onenand_block(this, offs) << 1);
 	res = (bbm->bbt[block >> 3] >> (block & 0x06)) & 0x03;
 
 	DEBUG(MTD_DEBUG_LEVEL2, "onenand_isbad_bbt: bbt info for offs 0x%08x: (block %d) 0x%02x\n",
@@ -178,7 +184,7 @@ int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
 	struct bbm_info *bbm = this->bbm;
 	int len, ret = 0;
 
-	len = mtd->size >> (this->erase_shift + 2);
+	len = this->chipsize >> (this->erase_shift + 2);
 	/* Allocate memory (2bit per block) and clear the memory bad block table */
 	bbm->bbt = kzalloc(len, GFP_KERNEL);
 	if (!bbm->bbt) {

drivers/mtd/onenand/onenand_sim.c

@@ -6,6 +6,10 @@
  *  Copyright © 2005-2007 Samsung Electronics
  *  Kyungmin Park <kyungmin.park@samsung.com>
  *
+ *  Vishak G <vishak.g at samsung.com>, Rohit Hagargundgi <h.rohit at samsung.com>
+ *  Flex-OneNAND simulator support
+ *  Copyright (C) Samsung Electronics, 2008
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
@@ -24,16 +28,38 @@
 #ifndef CONFIG_ONENAND_SIM_MANUFACTURER
 #define CONFIG_ONENAND_SIM_MANUFACTURER         0xec
 #endif
+
 #ifndef CONFIG_ONENAND_SIM_DEVICE_ID
 #define CONFIG_ONENAND_SIM_DEVICE_ID            0x04
 #endif
+
+#define CONFIG_FLEXONENAND ((CONFIG_ONENAND_SIM_DEVICE_ID >> 9) & 1)
+
 #ifndef CONFIG_ONENAND_SIM_VERSION_ID
 #define CONFIG_ONENAND_SIM_VERSION_ID           0x1e
 #endif
 
+#ifndef CONFIG_ONENAND_SIM_TECHNOLOGY_ID
+#define CONFIG_ONENAND_SIM_TECHNOLOGY_ID CONFIG_FLEXONENAND
+#endif
+
+/* Initial boundary values for Flex-OneNAND Simulator */
+#ifndef CONFIG_FLEXONENAND_SIM_DIE0_BOUNDARY
+#define CONFIG_FLEXONENAND_SIM_DIE0_BOUNDARY	0x01
+#endif
+
+#ifndef CONFIG_FLEXONENAND_SIM_DIE1_BOUNDARY
+#define CONFIG_FLEXONENAND_SIM_DIE1_BOUNDARY	0x01
+#endif
+
 static int manuf_id	= CONFIG_ONENAND_SIM_MANUFACTURER;
 static int device_id	= CONFIG_ONENAND_SIM_DEVICE_ID;
 static int version_id	= CONFIG_ONENAND_SIM_VERSION_ID;
+static int technology_id = CONFIG_ONENAND_SIM_TECHNOLOGY_ID;
+static int boundary[] = {
+	CONFIG_FLEXONENAND_SIM_DIE0_BOUNDARY,
+	CONFIG_FLEXONENAND_SIM_DIE1_BOUNDARY,
+};
 
 struct onenand_flash {
 	void __iomem *base;
@@ -57,12 +83,18 @@ struct onenand_flash {
 	(writew(v, this->base + ONENAND_REG_WP_STATUS))
 
 /* It has all 0xff chars */
-#define MAX_ONENAND_PAGESIZE		(2048 + 64)
+#define MAX_ONENAND_PAGESIZE		(4096 + 128)
 static unsigned char *ffchars;
 
+#if CONFIG_FLEXONENAND
+#define PARTITION_NAME "Flex-OneNAND simulator partition"
+#else
+#define PARTITION_NAME "OneNAND simulator partition"
+#endif
+
 static struct mtd_partition os_partitions[] = {
 	{
-		.name		= "OneNAND simulator partition",
+		.name		= PARTITION_NAME,
 		.offset		= 0,
 		.size		= MTDPART_SIZ_FULL,
 	},
@@ -104,6 +136,7 @@ static void onenand_lock_handle(struct onenand_chip *this, int cmd)
 
 	switch (cmd) {
 	case ONENAND_CMD_UNLOCK:
+	case ONENAND_CMD_UNLOCK_ALL:
 		if (block_lock_scheme)
 			ONENAND_SET_WP_STATUS(ONENAND_WP_US, this);
 		else
@@ -228,10 +261,12 @@ static void onenand_data_handle(struct onenand_chip *this, int cmd,
 {
 	struct mtd_info *mtd = &info->mtd;
 	struct onenand_flash *flash = this->priv;
-	int main_offset, spare_offset;
+	int main_offset, spare_offset, die = 0;
 	void __iomem *src;
 	void __iomem *dest;
 	unsigned int i;
+	static int pi_operation;
+	int erasesize, rgn;
 
 	if (dataram) {
 		main_offset = mtd->writesize;
@@ -241,10 +276,27 @@ static void onenand_data_handle(struct onenand_chip *this, int cmd,
 		spare_offset = 0;
 	}
 
+	if (pi_operation) {
+		die = readw(this->base + ONENAND_REG_START_ADDRESS2);
+		die >>= ONENAND_DDP_SHIFT;
+	}
+
 	switch (cmd) {
+	case FLEXONENAND_CMD_PI_ACCESS:
+		pi_operation = 1;
+		break;
+
+	case ONENAND_CMD_RESET:
+		pi_operation = 0;
+		break;
+
 	case ONENAND_CMD_READ:
 		src = ONENAND_CORE(flash) + offset;
 		dest = ONENAND_MAIN_AREA(this, main_offset);
+		if (pi_operation) {
+			writew(boundary[die], this->base + ONENAND_DATARAM);
+			break;
+		}
 		memcpy(dest, src, mtd->writesize);
 		/* Fall through */
 
@@ -257,6 +309,10 @@ static void onenand_data_handle(struct onenand_chip *this, int cmd,
 	case ONENAND_CMD_PROG:
 		src = ONENAND_MAIN_AREA(this, main_offset);
 		dest = ONENAND_CORE(flash) + offset;
+		if (pi_operation) {
+			boundary[die] = readw(this->base + ONENAND_DATARAM);
+			break;
+		}
 		/* To handle partial write */
 		for (i = 0; i < (1 << mtd->subpage_sft); i++) {
 			int off = i * this->subpagesize;
@@ -284,9 +340,18 @@ static void onenand_data_handle(struct onenand_chip *this, int cmd,
 		break;
 
 	case ONENAND_CMD_ERASE:
-		memset(ONENAND_CORE(flash) + offset, 0xff, mtd->erasesize);
+		if (pi_operation)
+			break;
+
+		if (FLEXONENAND(this)) {
+			rgn = flexonenand_region(mtd, offset);
+			erasesize = mtd->eraseregions[rgn].erasesize;
+		} else
+			erasesize = mtd->erasesize;
+
+		memset(ONENAND_CORE(flash) + offset, 0xff, erasesize);
 		memset(ONENAND_CORE_SPARE(flash, this, offset), 0xff,
-		       (mtd->erasesize >> 5));
+		       (erasesize >> 5));
 		break;
 
 	default:
@@ -339,7 +404,7 @@ static void onenand_command_handle(struct onenand_chip *this, int cmd)
 	}
 
 	if (block != -1)
-		offset += block << this->erase_shift;
+		offset = onenand_addr(this, block);
 
 	if (page != -1)
 		offset += page << this->page_shift;
@@ -390,6 +455,7 @@ static int __init flash_init(struct onenand_flash *flash)
 	}
 
 	density = device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+	density &= ONENAND_DEVICE_DENSITY_MASK;
 	size = ((16 << 20) << density);
 
 	ONENAND_CORE(flash) = vmalloc(size + (size >> 5));
@@ -405,8 +471,9 @@ static int __init flash_init(struct onenand_flash *flash)
 	writew(manuf_id, flash->base + ONENAND_REG_MANUFACTURER_ID);
 	writew(device_id, flash->base + ONENAND_REG_DEVICE_ID);
 	writew(version_id, flash->base + ONENAND_REG_VERSION_ID);
+	writew(technology_id, flash->base + ONENAND_REG_TECHNOLOGY);
 
-	if (density < 2)
+	if (density < 2 && (!CONFIG_FLEXONENAND))
 		buffer_size = 0x0400;	/* 1KiB page */
 	else
 		buffer_size = 0x0800;	/* 2KiB page */

fs/compat_ioctl.c

@@ -94,7 +94,6 @@
 #include <linux/atm_tcp.h>
 #include <linux/sonet.h>
 #include <linux/atm_suni.h>
-#include <linux/mtd/mtd.h>
 
 #include <linux/usb.h>
 #include <linux/usbdevice_fs.h>
@@ -1405,46 +1404,6 @@ static int ioc_settimeout(unsigned int fd, unsigned int cmd, unsigned long arg)
 #define HIDPGETCONNLIST	_IOR('H', 210, int)
 #define HIDPGETCONNINFO	_IOR('H', 211, int)
 
-struct mtd_oob_buf32 {
-	u_int32_t start;
-	u_int32_t length;
-	compat_caddr_t ptr;	/* unsigned char* */
-};
-
-#define MEMWRITEOOB32 	_IOWR('M',3,struct mtd_oob_buf32)
-#define MEMREADOOB32 	_IOWR('M',4,struct mtd_oob_buf32)
-
-static int mtd_rw_oob(unsigned int fd, unsigned int cmd, unsigned long arg)
-{
-	struct mtd_oob_buf __user *buf = compat_alloc_user_space(sizeof(*buf));
-	struct mtd_oob_buf32 __user *buf32 = compat_ptr(arg);
-	u32 data;
-	char __user *datap;
-	unsigned int real_cmd;
-	int err;
-
-	real_cmd = (cmd == MEMREADOOB32) ?
-		MEMREADOOB : MEMWRITEOOB;
-
-	if (copy_in_user(&buf->start, &buf32->start,
-			 2 * sizeof(u32)) ||
-	    get_user(data, &buf32->ptr))
-		return -EFAULT;
-	datap = compat_ptr(data);
-	if (put_user(datap, &buf->ptr))
-		return -EFAULT;
-
-	err = sys_ioctl(fd, real_cmd, (unsigned long) buf);
-
-	if (!err) {
-		if (copy_in_user(&buf32->start, &buf->start,
-				 2 * sizeof(u32)))
-			err = -EFAULT;
-	}
-
-	return err;
-}	
-
 #ifdef CONFIG_BLOCK
 struct raw32_config_request
 {
@@ -2426,15 +2385,6 @@ COMPATIBLE_IOCTL(USBDEVFS_SUBMITURB32)
 COMPATIBLE_IOCTL(USBDEVFS_REAPURB32)
 COMPATIBLE_IOCTL(USBDEVFS_REAPURBNDELAY32)
 COMPATIBLE_IOCTL(USBDEVFS_CLEAR_HALT)
-/* MTD */
-COMPATIBLE_IOCTL(MEMGETINFO)
-COMPATIBLE_IOCTL(MEMERASE)
-COMPATIBLE_IOCTL(MEMLOCK)
-COMPATIBLE_IOCTL(MEMUNLOCK)
-COMPATIBLE_IOCTL(MEMGETREGIONCOUNT)
-COMPATIBLE_IOCTL(MEMGETREGIONINFO)
-COMPATIBLE_IOCTL(MEMGETBADBLOCK)
-COMPATIBLE_IOCTL(MEMSETBADBLOCK)
 /* NBD */
 ULONG_IOCTL(NBD_SET_SOCK)
 ULONG_IOCTL(NBD_SET_BLKSIZE)
@@ -2544,8 +2494,6 @@ COMPATIBLE_IOCTL(JSIOCGBUTTONS)
 COMPATIBLE_IOCTL(JSIOCGNAME(0))
 
 /* now things that need handlers */
-HANDLE_IOCTL(MEMREADOOB32, mtd_rw_oob)
-HANDLE_IOCTL(MEMWRITEOOB32, mtd_rw_oob)
 #ifdef CONFIG_NET
 HANDLE_IOCTL(SIOCGIFNAME, dev_ifname32)
 HANDLE_IOCTL(SIOCGIFCONF, dev_ifconf)

fs/jffs2/scan.c

@@ -196,7 +196,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
 				if (c->nextblock) {
 					ret = file_dirty(c, c->nextblock);
 					if (ret)
-						return ret;
+						goto out;
 					/* deleting summary information of the old nextblock */
 					jffs2_sum_reset_collected(c->summary);
 				}
@@ -207,7 +207,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
 			} else {
 				ret = file_dirty(c, jeb);
 				if (ret)
-					return ret;
+					goto out;
 			}
 			break;
 

include/linux/mtd/nand.h

@@ -563,6 +563,7 @@ extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
  * @options:		Option flags, e.g. 16bit buswidth
  * @ecclayout:		ecc layout info structure
  * @part_probe_types:	NULL-terminated array of probe types
+ * @set_parts:		platform specific function to set partitions
  * @priv:		hardware controller specific settings
  */
 struct platform_nand_chip {
@@ -574,26 +575,41 @@ struct platform_nand_chip {
 	int			chip_delay;
 	unsigned int		options;
 	const char		**part_probe_types;
+	void			(*set_parts)(uint64_t size,
+					struct platform_nand_chip *chip);
 	void			*priv;
 };
 
+/* Keep gcc happy */
+struct platform_device;
+
 /**
  * struct platform_nand_ctrl - controller level device structure
+ * @probe:		platform specific function to probe/setup hardware
+ * @remove:		platform specific function to remove/teardown hardware
  * @hwcontrol:		platform specific hardware control structure
  * @dev_ready:		platform specific function to read ready/busy pin
  * @select_chip:	platform specific chip select function
  * @cmd_ctrl:		platform specific function for controlling
  *			ALE/CLE/nCE. Also used to write command and address
+ * @write_buf:		platform specific function for write buffer
+ * @read_buf:		platform specific function for read buffer
  * @priv:		private data to transport driver specific settings
  *
  * All fields are optional and depend on the hardware driver requirements
  */
 struct platform_nand_ctrl {
+	int		(*probe)(struct platform_device *pdev);
+	void		(*remove)(struct platform_device *pdev);
 	void		(*hwcontrol)(struct mtd_info *mtd, int cmd);
 	int		(*dev_ready)(struct mtd_info *mtd);
 	void		(*select_chip)(struct mtd_info *mtd, int chip);
 	void		(*cmd_ctrl)(struct mtd_info *mtd, int dat,
 				    unsigned int ctrl);
+	void		(*write_buf)(struct mtd_info *mtd,
+				    const uint8_t *buf, int len);
+	void		(*read_buf)(struct mtd_info *mtd,
+				    uint8_t *buf, int len);
 	void		*priv;
 };
 

include/linux/mtd/onenand.h

@@ -17,6 +17,7 @@
 #include <linux/mtd/onenand_regs.h>
 #include <linux/mtd/bbm.h>
 
+#define MAX_DIES		2
 #define MAX_BUFFERRAM		2
 
 /* Scan and identify a OneNAND device */
@@ -51,7 +52,12 @@ struct onenand_bufferram {
 /**
  * struct onenand_chip - OneNAND Private Flash Chip Data
  * @base:		[BOARDSPECIFIC] address to access OneNAND
+ * @dies:		[INTERN][FLEX-ONENAND] number of dies on chip
+ * @boundary:		[INTERN][FLEX-ONENAND] Boundary of the dies
+ * @diesize:		[INTERN][FLEX-ONENAND] Size of the dies
  * @chipsize:		[INTERN] the size of one chip for multichip arrays
+ *			FIXME For Flex-OneNAND, chipsize holds maximum possible
+ *			device size ie when all blocks are considered MLC
  * @device_id:		[INTERN] device ID
  * @density_mask:	chip density, used for DDP devices
  * @verstion_id:	[INTERN] version ID
@@ -68,6 +74,8 @@ struct onenand_bufferram {
  * @command:		[REPLACEABLE] hardware specific function for writing
  *			commands to the chip
  * @wait:		[REPLACEABLE] hardware specific function for wait on ready
+ * @bbt_wait:		[REPLACEABLE] hardware specific function for bbt wait on ready
+ * @unlock_all:		[REPLACEABLE] hardware specific function for unlock all
  * @read_bufferram:	[REPLACEABLE] hardware specific function for BufferRAM Area
  * @write_bufferram:	[REPLACEABLE] hardware specific function for BufferRAM Area
  * @read_word:		[REPLACEABLE] hardware specific function for read
@@ -92,9 +100,13 @@ struct onenand_bufferram {
  */
 struct onenand_chip {
 	void __iomem		*base;
+	unsigned		dies;
+	unsigned		boundary[MAX_DIES];
+	loff_t			diesize[MAX_DIES];
 	unsigned int		chipsize;
 	unsigned int		device_id;
 	unsigned int		version_id;
+	unsigned int		technology;
 	unsigned int		density_mask;
 	unsigned int		options;
 
@@ -108,6 +120,8 @@ struct onenand_chip {
 
 	int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len);
 	int (*wait)(struct mtd_info *mtd, int state);
+	int (*bbt_wait)(struct mtd_info *mtd, int state);
+	void (*unlock_all)(struct mtd_info *mtd);
 	int (*read_bufferram)(struct mtd_info *mtd, int area,
 			unsigned char *buffer, int offset, size_t count);
 	int (*write_bufferram)(struct mtd_info *mtd, int area,
@@ -145,6 +159,8 @@ struct onenand_chip {
 #define ONENAND_SET_BUFFERRAM0(this)		(this->bufferram_index = 0)
 #define ONENAND_SET_BUFFERRAM1(this)		(this->bufferram_index = 1)
 
+#define FLEXONENAND(this)						\
+	(this->device_id & DEVICE_IS_FLEXONENAND)
 #define ONENAND_GET_SYS_CFG1(this)					\
 	(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
 #define ONENAND_SET_SYS_CFG1(v, this)					\
@@ -153,6 +169,9 @@ struct onenand_chip {
 #define ONENAND_IS_DDP(this)						\
 	(this->device_id & ONENAND_DEVICE_IS_DDP)
 
+#define ONENAND_IS_MLC(this)						\
+	(this->technology & ONENAND_TECHNOLOGY_IS_MLC)
+
 #ifdef CONFIG_MTD_ONENAND_2X_PROGRAM
 #define ONENAND_IS_2PLANE(this)						\
 	(this->options & ONENAND_HAS_2PLANE)
@@ -169,6 +188,7 @@ struct onenand_chip {
 #define ONENAND_HAS_CONT_LOCK		(0x0001)
 #define ONENAND_HAS_UNLOCK_ALL		(0x0002)
 #define ONENAND_HAS_2PLANE		(0x0004)
+#define ONENAND_SKIP_UNLOCK_CHECK	(0x0100)
 #define ONENAND_PAGEBUF_ALLOC		(0x1000)
 #define ONENAND_OOBBUF_ALLOC		(0x2000)
 
@@ -176,6 +196,7 @@ struct onenand_chip {
  * OneNAND Flash Manufacturer ID Codes
  */
 #define ONENAND_MFR_SAMSUNG	0xec
+#define ONENAND_MFR_NUMONYX	0x20
 
 /**
  * struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
@@ -189,5 +210,8 @@ struct onenand_manufacturers {
 
 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 			 struct mtd_oob_ops *ops);
+unsigned onenand_block(struct onenand_chip *this, loff_t addr);
+loff_t onenand_addr(struct onenand_chip *this, int block);
+int flexonenand_region(struct mtd_info *mtd, loff_t addr);
 
 #endif	/* __LINUX_MTD_ONENAND_H */

include/linux/mtd/onenand_regs.h

@@ -67,6 +67,9 @@
 /*
  * Device ID Register F001h (R)
  */
+#define DEVICE_IS_FLEXONENAND		(1 << 9)
+#define FLEXONENAND_PI_MASK		(0x3ff)
+#define FLEXONENAND_PI_UNLOCK_SHIFT	(14)
 #define ONENAND_DEVICE_DENSITY_MASK	(0xf)
 #define ONENAND_DEVICE_DENSITY_SHIFT	(4)
 #define ONENAND_DEVICE_IS_DDP		(1 << 3)
@@ -83,6 +86,11 @@
  */
 #define ONENAND_VERSION_PROCESS_SHIFT	(8)
 
+/*
+ * Technology Register F006h (R)
+ */
+#define ONENAND_TECHNOLOGY_IS_MLC	(1 << 0)
+
 /*
  * Start Address 1 F100h (R/W) & Start Address 2 F101h (R/W)
  */
@@ -93,7 +101,8 @@
 /*
  * Start Address 8 F107h (R/W)
  */
-#define ONENAND_FPA_MASK		(0x3f)
+/* Note: It's actually 0x3f in case of SLC */
+#define ONENAND_FPA_MASK		(0x7f)
 #define ONENAND_FPA_SHIFT		(2)
 #define ONENAND_FSA_MASK		(0x03)
 
@@ -105,7 +114,8 @@
 #define ONENAND_BSA_BOOTRAM		(0 << 2)
 #define ONENAND_BSA_DATARAM0		(2 << 2)
 #define ONENAND_BSA_DATARAM1		(3 << 2)
-#define ONENAND_BSC_MASK		(0x03)
+/* Note: It's actually 0x03 in case of SLC */
+#define ONENAND_BSC_MASK		(0x07)
 
 /*
  * Command Register F220h (R/W)
@@ -124,9 +134,13 @@
 #define ONENAND_CMD_RESET		(0xF0)
 #define ONENAND_CMD_OTP_ACCESS		(0x65)
 #define ONENAND_CMD_READID		(0x90)
+#define FLEXONENAND_CMD_PI_UPDATE	(0x05)
+#define FLEXONENAND_CMD_PI_ACCESS	(0x66)
+#define FLEXONENAND_CMD_RECOVER_LSB	(0x05)
 
 /* NOTE: Those are not *REAL* commands */
 #define ONENAND_CMD_BUFFERRAM		(0x1978)
+#define FLEXONENAND_CMD_READ_PI		(0x1985)
 
 /*
  * System Configuration 1 Register F221h (R, R/W)
@@ -192,10 +206,12 @@
 #define ONENAND_ECC_1BIT_ALL		(0x5555)
 #define ONENAND_ECC_2BIT		(1 << 1)
 #define ONENAND_ECC_2BIT_ALL		(0xAAAA)
+#define FLEXONENAND_UNCORRECTABLE_ERROR	(0x1010)
 
 /*
  * One-Time Programmable (OTP)
  */
+#define FLEXONENAND_OTP_LOCK_OFFSET		(2048)
 #define ONENAND_OTP_LOCK_OFFSET		(14)
 
 #endif	/* __ONENAND_REG_H */

include/linux/mtd/partitions.h

@@ -40,7 +40,6 @@ struct mtd_partition {
 	uint64_t offset;		/* offset within the master MTD space */
 	uint32_t mask_flags;		/* master MTD flags to mask out for this partition */
 	struct nand_ecclayout *ecclayout;	/* out of band layout for this partition (NAND only)*/
-	struct mtd_info **mtdp;		/* pointer to store the MTD object */
 };
 
 #define MTDPART_OFS_NXTBLK	(-2)

include/mtd/Kbuild

 header-y += inftl-user.h
-header-y += jffs2-user.h
 header-y += mtd-abi.h
 header-y += mtd-user.h
 header-y += nftl-user.h

include/mtd/jffs2-user.h

-/*
- * JFFS2 definitions for use in user space only
- */
-
-#ifndef __JFFS2_USER_H__
-#define __JFFS2_USER_H__
-
-/* This file is blessed for inclusion by userspace */
-#include <linux/jffs2.h>
-#include <linux/types.h>
-#include <endian.h>
-#include <byteswap.h>
-
-#undef cpu_to_je16
-#undef cpu_to_je32
-#undef cpu_to_jemode
-#undef je16_to_cpu
-#undef je32_to_cpu
-#undef jemode_to_cpu
-
-extern int target_endian;
-
-#define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
-#define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
-
-#define cpu_to_je16(x) ((jint16_t){t16(x)})
-#define cpu_to_je32(x) ((jint32_t){t32(x)})
-#define cpu_to_jemode(x) ((jmode_t){t32(x)})
-
-#define je16_to_cpu(x) (t16((x).v16))
-#define je32_to_cpu(x) (t32((x).v32))
-#define jemode_to_cpu(x) (t32((x).m))
-
-#endif /* __JFFS2_USER_H__ */

include/mtd/mtd-abi.h

@@ -12,12 +12,24 @@ struct erase_info_user {
 	__u32 length;
 };
 
+struct erase_info_user64 {
+	__u64 start;
+	__u64 length;
+};
+
 struct mtd_oob_buf {
 	__u32 start;
 	__u32 length;
 	unsigned char __user *ptr;
 };
 
+struct mtd_oob_buf64 {
+	__u64 start;
+	__u32 pad;
+	__u32 length;
+	__u64 usr_ptr;
+};
+
 #define MTD_ABSENT		0
 #define MTD_RAM			1
 #define MTD_ROM			2
@@ -95,6 +107,9 @@ struct otp_info {
 #define ECCGETLAYOUT		_IOR('M', 17, struct nand_ecclayout)
 #define ECCGETSTATS		_IOR('M', 18, struct mtd_ecc_stats)
 #define MTDFILEMODE		_IO('M', 19)
+#define MEMERASE64		_IOW('M', 20, struct erase_info_user64)
+#define MEMWRITEOOB64		_IOWR('M', 21, struct mtd_oob_buf64)
+#define MEMREADOOB64		_IOWR('M', 22, struct mtd_oob_buf64)
 
 /*
  * Obsolete legacy interface. Keep it in order not to break userspace