Merge branch 'master' of git://git.denx.de/u-boot-ubi

10 files changed, 718 insertions, 387 deletions

diff --git a/include/configs/apollon.h b/include/configs/apollon.h
index d71ed44fcd..dff47fc6a6 100644
--- a/include/configs/apollon.h
+++ b/include/configs/apollon.h
@@ -53,6 +53,9 @@
 #define CONFIG_SYS_USE_NOR		1
 #endif
 
+/* uncommnet if you want to use UBI */
+#define CONFIG_SYS_USE_UBI
+
 #include <asm/arch/omap2420.h>	/* get chip and board defs */
 
 #define	V_SCLK	12000000
@@ -73,8 +76,9 @@
  * Size of malloc() pool
  */
 #define	CONFIG_ENV_SIZE SZ_128K	/* Total Size of Environment Sector */
-#define	CONFIG_SYS_MALLOC_LEN	(CONFIG_ENV_SIZE + SZ_128K)
-#define	CONFIG_SYS_GBL_DATA_SIZE	128	/* bytes reserved for initial data */
+#define	CONFIG_SYS_MALLOC_LEN	(CONFIG_ENV_SIZE + SZ_1M)
+/* bytes reserved for initial data */
+#define	CONFIG_SYS_GBL_DATA_SIZE	128
 
 /*
  * Hardware drivers
@@ -116,6 +120,13 @@
 #define	CONFIG_CMD_DIAG
 #define	CONFIG_CMD_ONENAND
 
+#ifdef CONFIG_SYS_USE_UBI
+#define	CONFIG_CMD_JFFS2
+#define	CONFIG_CMD_UBI
+#define	CONFIG_RBTREE
+#define CONFIG_MTD_PARTITIONS
+#endif
+
 #undef	CONFIG_CMD_AUTOSCRIPT
 
 #ifndef	CONFIG_SYS_USE_NOR
@@ -133,24 +144,39 @@
 #define	CONFIG_BOOTFILE	"uImage"
 #define	CONFIG_ETHADDR	00:0E:99:00:24:20
 
-#ifdef	CONFIG_APOLLON_PLUS
-# define	CONFIG_BOOTARGS "root=/dev/nfs rw mem=64M console=ttyS0,115200n8 ip=192.168.116.25:192.168.116.1:192.168.116.1:255.255.255.0:apollon:eth0:off nfsroot=/tftpboot/nfsroot profile=2"
+#ifdef CONFIG_APOLLON_PLUS
+#define CONFIG_SYS_MEM	"mem=64M"
+#else
+#define CONFIG_SYS_MEM	"mem=128"
+#endif
+
+#ifdef CONFIG_SYS_USE_UBI
+#define CONFIG_SYS_UBI "ubi.mtd=4"
 #else
-# define	CONFIG_BOOTARGS "root=/dev/nfs rw mem=128M console=ttyS0,115200n8 ip=192.168.116.25:192.168.116.1:192.168.116.1:255.255.255.0:apollon:eth0:off nfsroot=/tftpboot/nfsroot profile=2"
+#define CONFIG_SYS_UBI ""
 #endif
 
+#define CONFIG_BOOTARGS "root=/dev/nfs rw " CONFIG_SYS_MEM \
+	" console=ttyS0,115200n8" \
+	" ip=192.168.116.25:192.168.116.1:192.168.116.1:255.255.255.0:" \
+	"apollon:eth0:off nfsroot=/tftpboot/nfsroot profile=2 " \
+	CONFIG_SYS_UBI
+
 #define	CONFIG_EXTRA_ENV_SETTINGS					\
 	"Image=tftp 0x80008000 Image; go 0x80008000\0"			\
 	"zImage=tftp 0x80180000 zImage; go 0x80180000\0"		\
 	"uImage=tftp 0x80180000 uImage; bootm 0x80180000\0"		\
 	"uboot=tftp 0x80008000 u-boot.bin; go 0x80008000\0"		\
-	"xloader=tftp 0x80180000 x-load.bin; cp.w 0x80180000 0x00000400 0x1000; go 0x00000400\0"	\
+	"xloader=tftp 0x80180000 x-load.bin; "				\
+	" cp.w 0x80180000 0x00000400 0x1000; go 0x00000400\0"		\
 	"syncmode50=mw.w 0x1e442 0xc0c4; mw 0x6800a060 0xe30d1201\0"	\
 	"syncmode=mw.w 0x1e442 0xe0f4; mw 0x6800a060 0xe30d1201\0"	\
 	"norboot=cp32 0x18040000 0x80008000 0x200000; go 0x80008000\0"	\
-	"oneboot=onenand read 0x80008000 0x40000 0x200000; go 0x80008000\0"\
+	"oneboot=onenand read 0x80008000 0x40000 0x200000; go 0x80008000\0" \
 	"onesyncboot=run syncmode oneboot\0"				\
-	"updateb=tftp 0x80180000 u-boot-onenand.bin; onenand erase 0x0 0x20000; onenand write 0x80180000 0x0 0x20000\0"					\
+	"updateb=tftp 0x80180000 u-boot-onenand.bin; "			\
+	" onenand erase 0x0 0x20000; onenand write 0x80180000 0x0 0x20000\0" \
+	"ubi=setenv bootargs ${bootargs} ubi.mtd=4 ${mtdparts}; run uImage\0" \
 	"bootcmd=run uboot\0"
 
 /*
@@ -164,14 +190,15 @@
 /* Print Buffer Size */
 #define	CONFIG_SYS_PBSIZE	(CONFIG_SYS_CBSIZE+sizeof(CONFIG_SYS_PROMPT)+16)
 #define	CONFIG_SYS_MAXARGS	16	/* max number of command args */
-#define	CONFIG_SYS_BARGSIZE	CONFIG_SYS_CBSIZE	/* Boot Argument Buffer Size */
-
-#define	CONFIG_SYS_MEMTEST_START	(OMAP2420_SDRC_CS0)	/* memtest works on */
+/* Boot Argument Buffer Size */
+#define	CONFIG_SYS_BARGSIZE	CONFIG_SYS_CBSIZE
+/* memtest works on */
+#define	CONFIG_SYS_MEMTEST_START	(OMAP2420_SDRC_CS0)
 #define	CONFIG_SYS_MEMTEST_END		(OMAP2420_SDRC_CS0+SZ_31M)
 
 #undef	CONFIG_SYS_CLKS_IN_HZ	/* everything, incl board info, in Hz */
-
-#define	CONFIG_SYS_LOAD_ADDR	(OMAP2420_SDRC_CS0)	/* default load address */
+/* default load address */
+#define	CONFIG_SYS_LOAD_ADDR	(OMAP2420_SDRC_CS0)
 
 /* The 2420 has 12 GP timers, they can be driven by the SysClk (12/13/19.2)
  * or by 32KHz clk, or from external sig. This rate is divided by a local
@@ -211,13 +238,15 @@
 # define	CONFIG_SYS_MAX_FLASH_BANKS	1
 # define	CONFIG_SYS_MAX_FLASH_SECT	1024
 /*-----------------------------------------------------------------------
-
  * CFI FLASH driver setup
  */
-# define	CONFIG_SYS_FLASH_CFI	1	/* Flash memory is CFI compliant */
+/* Flash memory is CFI compliant */
+# define	CONFIG_SYS_FLASH_CFI	1
 # define	CONFIG_FLASH_CFI_DRIVER	1	/* Use drivers/cfi_flash.c */
-/* #define CONFIG_SYS_FLASH_USE_BUFFER_WRITE 1 */ /* Use buffered writes (~10x faster) */
-# define	CONFIG_SYS_FLASH_PROTECTION	1	/* Use h/w sector protection*/
+/* Use buffered writes (~10x faster) */
+/* #define CONFIG_SYS_FLASH_USE_BUFFER_WRITE 1 */
+/* Use h/w sector protection*/
+# define	CONFIG_SYS_FLASH_PROTECTION	1
 
 #else	/* !CONFIG_SYS_USE_NOR */
 # define	CONFIG_SYS_NO_FLASH	1
@@ -228,4 +257,15 @@
 #define	CONFIG_ENV_IS_IN_ONENAND	1
 #define CONFIG_ENV_ADDR		0x00020000
 
+#ifdef CONFIG_SYS_USE_UBI
+#define CONFIG_JFFS2_CMDLINE
+#define MTDIDS_DEFAULT		"onenand0=onenand"
+#define MTDPARTS_DEFAULT	"mtdparts=onenand:128k(bootloader),"	\
+					"128k(params),"			\
+					"2m(kernel),"			\
+					"16m(rootfs),"			\
+					"32m(fs),"			\
+					"-(ubifs)"
+#endif
+
 #endif /* __CONFIG_H */
diff --git a/include/exports.h b/include/exports.h
index 6377875bc9..0620e9eb89 100644
--- a/include/exports.h
+++ b/include/exports.h
@@ -25,6 +25,7 @@ char *getenv (char *name);
 int setenv (char *varname, char *varvalue);
 long simple_strtol(const char *cp,char **endp,unsigned int base);
 int strcmp(const char * cs,const char * ct);
+int ustrtoul(const char *cp, char **endp, unsigned int base);
 #ifdef CONFIG_HAS_UID
 void forceenv (char *varname, char *varvalue);
 #endif
diff --git a/include/jffs2/load_kernel.h b/include/jffs2/load_kernel.h
index 551fd0c442..e9b7d6e7c9 100644
--- a/include/jffs2/load_kernel.h
+++ b/include/jffs2/load_kernel.h
@@ -73,4 +73,9 @@ struct mtdids {
 #define putLabeledWord(x, y)	printf("%s %08x\n", x, (unsigned int)y)
 #define led_blink(x, y, z, a)
 
+/* common/cmd_jffs2.c */
+extern int mtdparts_init(void);
+extern int find_dev_and_part(const char *id, struct mtd_device **dev,
+				u8 *part_num, struct part_info **part);
+
 #endif /* load_kernel_h */
diff --git a/include/linux/crc32.h b/include/linux/crc32.h
new file mode 100644
index 0000000000..e1331571e1
--- /dev/null
+++ b/include/linux/crc32.h
@@ -0,0 +1,27 @@
+/*
+ * crc32.h
+ * See linux/lib/crc32.c for license and changes
+ */
+#ifndef _LINUX_CRC32_H
+#define _LINUX_CRC32_H
+
+#include <linux/types.h>
+//#include <linux/bitrev.h>
+
+extern u32  crc32_le(u32 crc, unsigned char const *p, size_t len);
+//extern u32  crc32_be(u32 crc, unsigned char const *p, size_t len);
+
+#define crc32(seed, data, length)  crc32_le(seed, (unsigned char const *)data, length)
+
+/*
+ * Helpers for hash table generation of ethernet nics:
+ *
+ * Ethernet sends the least significant bit of a byte first, thus crc32_le
+ * is used. The output of crc32_le is bit reversed [most significant bit
+ * is in bit nr 0], thus it must be reversed before use. Except for
+ * nics that bit swap the result internally...
+ */
+//#define ether_crc(length, data)    bitrev32(crc32_le(~0, data, length))
+//#define ether_crc_le(length, data) crc32_le(~0, data, length)
+
+#endif /* _LINUX_CRC32_H */
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
new file mode 100644
index 0000000000..b41e5f564c
--- /dev/null
+++ b/include/linux/mtd/partitions.h
@@ -0,0 +1,84 @@
+/*
+ * MTD partitioning layer definitions
+ *
+ * (C) 2000 Nicolas Pitre <nico@cam.org>
+ *
+ * This code is GPL
+ *
+ * $Id: partitions.h,v 1.17 2005/11/07 11:14:55 gleixner Exp $
+ */
+
+#ifndef MTD_PARTITIONS_H
+#define MTD_PARTITIONS_H
+
+#include <linux/types.h>
+
+
+/*
+ * Partition definition structure:
+ *
+ * An array of struct partition is passed along with a MTD object to
+ * add_mtd_partitions() to create them.
+ *
+ * For each partition, these fields are available:
+ * name: string that will be used to label the partition's MTD device.
+ * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition
+ * 	will extend to the end of the master MTD device.
+ * offset: absolute starting position within the master MTD device; if
+ * 	defined as MTDPART_OFS_APPEND, the partition will start where the
+ * 	previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block.
+ * mask_flags: contains flags that have to be masked (removed) from the
+ * 	master MTD flag set for the corresponding MTD partition.
+ * 	For example, to force a read-only partition, simply adding
+ * 	MTD_WRITEABLE to the mask_flags will do the trick.
+ *
+ * Note: writeable partitions require their size and offset be
+ * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
+ */
+
+struct mtd_partition {
+	char *name;			/* identifier string */
+	u_int32_t size;			/* partition size */
+	u_int32_t offset;		/* offset within the master MTD space */
+	u_int32_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)
+#define MTDPART_OFS_APPEND	(-1)
+#define MTDPART_SIZ_FULL	(0)
+
+
+int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
+int del_mtd_partitions(struct mtd_info *);
+
+#if 0
+/*
+ * Functions dealing with the various ways of partitioning the space
+ */
+
+struct mtd_part_parser {
+	struct list_head list;
+	struct module *owner;
+	const char *name;
+	int (*parse_fn)(struct mtd_info *, struct mtd_partition **, unsigned long);
+};
+
+extern int register_mtd_parser(struct mtd_part_parser *parser);
+extern int deregister_mtd_parser(struct mtd_part_parser *parser);
+extern int parse_mtd_partitions(struct mtd_info *master, const char **types,
+				struct mtd_partition **pparts, unsigned long origin);
+
+#define put_partition_parser(p) do { module_put((p)->owner); } while(0)
+
+struct device;
+struct device_node;
+
+int __devinit of_mtd_parse_partitions(struct device *dev,
+                                      struct mtd_info *mtd,
+                                      struct device_node *node,
+                                      struct mtd_partition **pparts);
+#endif
+
+#endif
diff --git a/include/linux/mtd/ubi-header.h b/include/linux/mtd/ubi-header.h
deleted file mode 100644
index fa479c71aa..0000000000
--- a/include/linux/mtd/ubi-header.h
+++ /dev/null
@@ -1,360 +0,0 @@
-/*
- * Copyright (c) International Business Machines Corp., 2006
- *
- * 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 program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Authors: Artem Bityutskiy (Битюцкий Артём)
- *          Thomas Gleixner
- *          Frank Haverkamp
- *          Oliver Lohmann
- *          Andreas Arnez
- */
-
-/*
- * This file defines the layout of UBI headers and all the other UBI on-flash
- * data structures. May be included by user-space.
- */
-
-#ifndef __UBI_HEADER_H__
-#define __UBI_HEADER_H__
-
-#include <asm/byteorder.h>
-
-/* The version of UBI images supported by this implementation */
-#define UBI_VERSION 1
-
-/* The highest erase counter value supported by this implementation */
-#define UBI_MAX_ERASECOUNTER 0x7FFFFFFF
-
-/* The initial CRC32 value used when calculating CRC checksums */
-#define UBI_CRC32_INIT 0xFFFFFFFFU
-
-/* Erase counter header magic number (ASCII "UBI#") */
-#define UBI_EC_HDR_MAGIC  0x55424923
-/* Volume identifier header magic number (ASCII "UBI!") */
-#define UBI_VID_HDR_MAGIC 0x55424921
-
-/*
- * Volume type constants used in the volume identifier header.
- *
- * @UBI_VID_DYNAMIC: dynamic volume
- * @UBI_VID_STATIC: static volume
- */
-enum {
-	UBI_VID_DYNAMIC = 1,
-	UBI_VID_STATIC  = 2
-};
-
-/*
- * Compatibility constants used by internal volumes.
- *
- * @UBI_COMPAT_DELETE: delete this internal volume before anything is written
- * to the flash
- * @UBI_COMPAT_RO: attach this device in read-only mode
- * @UBI_COMPAT_PRESERVE: preserve this internal volume - do not touch its
- * physical eraseblocks, don't allow the wear-leveling unit to move them
- * @UBI_COMPAT_REJECT: reject this UBI image
- */
-enum {
-	UBI_COMPAT_DELETE   = 1,
-	UBI_COMPAT_RO       = 2,
-	UBI_COMPAT_PRESERVE = 4,
-	UBI_COMPAT_REJECT   = 5
-};
-
-/*
- * ubi16_t/ubi32_t/ubi64_t - 16, 32, and 64-bit integers used in UBI on-flash
- * data structures.
- */
-typedef struct {
-	uint16_t int16;
-} __attribute__ ((packed)) ubi16_t;
-
-typedef struct {
-	uint32_t int32;
-} __attribute__ ((packed)) ubi32_t;
-
-typedef struct {
-	uint64_t int64;
-} __attribute__ ((packed)) ubi64_t;
-
-/*
- * In this implementation of UBI uses the big-endian format for on-flash
- * integers. The below are the corresponding conversion macros.
- */
-#define cpu_to_ubi16(x) ((ubi16_t){__cpu_to_be16(x)})
-#define ubi16_to_cpu(x) ((uint16_t)__be16_to_cpu((x).int16))
-
-#define cpu_to_ubi32(x) ((ubi32_t){__cpu_to_be32(x)})
-#define ubi32_to_cpu(x) ((uint32_t)__be32_to_cpu((x).int32))
-
-#define cpu_to_ubi64(x) ((ubi64_t){__cpu_to_be64(x)})
-#define ubi64_to_cpu(x) ((uint64_t)__be64_to_cpu((x).int64))
-
-/* Sizes of UBI headers */
-#define UBI_EC_HDR_SIZE  sizeof(struct ubi_ec_hdr)
-#define UBI_VID_HDR_SIZE sizeof(struct ubi_vid_hdr)
-
-/* Sizes of UBI headers without the ending CRC */
-#define UBI_EC_HDR_SIZE_CRC  (UBI_EC_HDR_SIZE  - sizeof(ubi32_t))
-#define UBI_VID_HDR_SIZE_CRC (UBI_VID_HDR_SIZE - sizeof(ubi32_t))
-
-/**
- * struct ubi_ec_hdr - UBI erase counter header.
- * @magic: erase counter header magic number (%UBI_EC_HDR_MAGIC)
- * @version: version of UBI implementation which is supposed to accept this
- * UBI image
- * @padding1: reserved for future, zeroes
- * @ec: the erase counter
- * @vid_hdr_offset: where the VID header starts
- * @data_offset: where the user data start
- * @padding2: reserved for future, zeroes
- * @hdr_crc: erase counter header CRC checksum
- *
- * The erase counter header takes 64 bytes and has a plenty of unused space for
- * future usage. The unused fields are zeroed. The @version field is used to
- * indicate the version of UBI implementation which is supposed to be able to
- * work with this UBI image. If @version is greater then the current UBI
- * version, the image is rejected. This may be useful in future if something
- * is changed radically. This field is duplicated in the volume identifier
- * header.
- *
- * The @vid_hdr_offset and @data_offset fields contain the offset of the the
- * volume identifier header and user data, relative to the beginning of the
- * physical eraseblock. These values have to be the same for all physical
- * eraseblocks.
- */
-struct ubi_ec_hdr {
-	ubi32_t magic;
-	uint8_t version;
-	uint8_t padding1[3];
-	ubi64_t ec; /* Warning: the current limit is 31-bit anyway! */
-	ubi32_t vid_hdr_offset;
-	ubi32_t data_offset;
-	uint8_t padding2[36];
-	ubi32_t hdr_crc;
-} __attribute__ ((packed));
-
-/**
- * struct ubi_vid_hdr - on-flash UBI volume identifier header.
- * @magic: volume identifier header magic number (%UBI_VID_HDR_MAGIC)
- * @version: UBI implementation version which is supposed to accept this UBI
- * image (%UBI_VERSION)
- * @vol_type: volume type (%UBI_VID_DYNAMIC or %UBI_VID_STATIC)
- * @copy_flag: if this logical eraseblock was copied from another physical
- * eraseblock (for wear-leveling reasons)
- * @compat: compatibility of this volume (%0, %UBI_COMPAT_DELETE,
- * %UBI_COMPAT_IGNORE, %UBI_COMPAT_PRESERVE, or %UBI_COMPAT_REJECT)
- * @vol_id: ID of this volume
- * @lnum: logical eraseblock number
- * @leb_ver: version of this logical eraseblock (IMPORTANT: obsolete, to be
- * removed, kept only for not breaking older UBI users)
- * @data_size: how many bytes of data this logical eraseblock contains
- * @used_ebs: total number of used logical eraseblocks in this volume
- * @data_pad: how many bytes at the end of this physical eraseblock are not
- * used
- * @data_crc: CRC checksum of the data stored in this logical eraseblock
- * @padding1: reserved for future, zeroes
- * @sqnum: sequence number
- * @padding2: reserved for future, zeroes
- * @hdr_crc: volume identifier header CRC checksum
- *
- * The @sqnum is the value of the global sequence counter at the time when this
- * VID header was created. The global sequence counter is incremented each time
- * UBI writes a new VID header to the flash, i.e. when it maps a logical
- * eraseblock to a new physical eraseblock. The global sequence counter is an
- * unsigned 64-bit integer and we assume it never overflows. The @sqnum
- * (sequence number) is used to distinguish between older and newer versions of
- * logical eraseblocks.
- *
- * There are 2 situations when there may be more then one physical eraseblock
- * corresponding to the same logical eraseblock, i.e., having the same @vol_id
- * and @lnum values in the volume identifier header. Suppose we have a logical
- * eraseblock L and it is mapped to the physical eraseblock P.
- *
- * 1. Because UBI may erase physical eraseblocks asynchronously, the following
- * situation is possible: L is asynchronously erased, so P is scheduled for
- * erasure, then L is written to,i.e. mapped to another physical eraseblock P1,
- * so P1 is written to, then an unclean reboot happens. Result - there are 2
- * physical eraseblocks P and P1 corresponding to the same logical eraseblock
- * L. But P1 has greater sequence number, so UBI picks P1 when it attaches the
- * flash.
- *
- * 2. From time to time UBI moves logical eraseblocks to other physical
- * eraseblocks for wear-leveling reasons. If, for example, UBI moves L from P
- * to P1, and an unclean reboot happens before P is physically erased, there
- * are two physical eraseblocks P and P1 corresponding to L and UBI has to
- * select one of them when the flash is attached. The @sqnum field says which
- * PEB is the original (obviously P will have lower @sqnum) and the copy. But
- * it is not enough to select the physical eraseblock with the higher sequence
- * number, because the unclean reboot could have happen in the middle of the
- * copying process, so the data in P is corrupted. It is also not enough to
- * just select the physical eraseblock with lower sequence number, because the
- * data there may be old (consider a case if more data was added to P1 after
- * the copying). Moreover, the unclean reboot may happen when the erasure of P
- * was just started, so it result in unstable P, which is "mostly" OK, but
- * still has unstable bits.
- *
- * UBI uses the @copy_flag field to indicate that this logical eraseblock is a
- * copy. UBI also calculates data CRC when the data is moved and stores it at
- * the @data_crc field of the copy (P1). So when UBI needs to pick one physical
- * eraseblock of two (P or P1), the @copy_flag of the newer one (P1) is
- * examined. If it is cleared, the situation* is simple and the newer one is
- * picked. If it is set, the data CRC of the copy (P1) is examined. If the CRC
- * checksum is correct, this physical eraseblock is selected (P1). Otherwise
- * the older one (P) is selected.
- *
- * Note, there is an obsolete @leb_ver field which was used instead of @sqnum
- * in the past. But it is not used anymore and we keep it in order to be able
- * to deal with old UBI images. It will be removed at some point.
- *
- * There are 2 sorts of volumes in UBI: user volumes and internal volumes.
- * Internal volumes are not seen from outside and are used for various internal
- * UBI purposes. In this implementation there is only one internal volume - the
- * layout volume. Internal volumes are the main mechanism of UBI extensions.
- * For example, in future one may introduce a journal internal volume. Internal
- * volumes have their own reserved range of IDs.
- *
- * The @compat field is only used for internal volumes and contains the "degree
- * of their compatibility". It is always zero for user volumes. This field
- * provides a mechanism to introduce UBI extensions and to be still compatible
- * with older UBI binaries. For example, if someone introduced a journal in
- * future, he would probably use %UBI_COMPAT_DELETE compatibility for the
- * journal volume.  And in this case, older UBI binaries, which know nothing
- * about the journal volume, would just delete this volume and work perfectly
- * fine. This is similar to what Ext2fs does when it is fed by an Ext3fs image
- * - it just ignores the Ext3fs journal.
- *
- * The @data_crc field contains the CRC checksum of the contents of the logical
- * eraseblock if this is a static volume. In case of dynamic volumes, it does
- * not contain the CRC checksum as a rule. The only exception is when the
- * data of the physical eraseblock was moved by the wear-leveling unit, then
- * the wear-leveling unit calculates the data CRC and stores it in the
- * @data_crc field. And of course, the @copy_flag is %in this case.
- *
- * The @data_size field is used only for static volumes because UBI has to know
- * how many bytes of data are stored in this eraseblock. For dynamic volumes,
- * this field usually contains zero. The only exception is when the data of the
- * physical eraseblock was moved to another physical eraseblock for
- * wear-leveling reasons. In this case, UBI calculates CRC checksum of the
- * contents and uses both @data_crc and @data_size fields. In this case, the
- * @data_size field contains data size.
- *
- * The @used_ebs field is used only for static volumes and indicates how many
- * eraseblocks the data of the volume takes. For dynamic volumes this field is
- * not used and always contains zero.
- *
- * The @data_pad is calculated when volumes are created using the alignment
- * parameter. So, effectively, the @data_pad field reduces the size of logical
- * eraseblocks of this volume. This is very handy when one uses block-oriented
- * software (say, cramfs) on top of the UBI volume.
- */
-struct ubi_vid_hdr {
-	ubi32_t magic;
-	uint8_t version;
-	uint8_t vol_type;
-	uint8_t copy_flag;
-	uint8_t compat;
-	ubi32_t vol_id;
-	ubi32_t lnum;
-	ubi32_t leb_ver; /* obsolete, to be removed, don't use */
-	ubi32_t data_size;
-	ubi32_t used_ebs;
-	ubi32_t data_pad;
-	ubi32_t data_crc;
-	uint8_t padding1[4];
-	ubi64_t sqnum;
-	uint8_t padding2[12];
-	ubi32_t hdr_crc;
-} __attribute__ ((packed));
-
-/* Internal UBI volumes count */
-#define UBI_INT_VOL_COUNT 1
-
-/*
- * Starting ID of internal volumes. There is reserved room for 4096 internal
- * volumes.
- */
-#define UBI_INTERNAL_VOL_START (0x7FFFFFFF - 4096)
-
-/* The layout volume contains the volume table */
-
-#define UBI_LAYOUT_VOL_ID        UBI_INTERNAL_VOL_START
-#define UBI_LAYOUT_VOLUME_EBS    2
-#define UBI_LAYOUT_VOLUME_NAME   "layout volume"
-#define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT
-
-/* The maximum number of volumes per one UBI device */
-#define UBI_MAX_VOLUMES 128
-
-/* The maximum volume name length */
-#define UBI_VOL_NAME_MAX 127
-
-/* Size of the volume table record */
-#define UBI_VTBL_RECORD_SIZE sizeof(struct ubi_vtbl_record)
-
-/* Size of the volume table record without the ending CRC */
-#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(ubi32_t))
-
-/**
- * struct ubi_vtbl_record - a record in the volume table.
- * @reserved_pebs: how many physical eraseblocks are reserved for this volume
- * @alignment: volume alignment
- * @data_pad: how many bytes are unused at the end of the each physical
- * eraseblock to satisfy the requested alignment
- * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
- * @upd_marker: if volume update was started but not finished
- * @name_len: volume name length
- * @name: the volume name
- * @padding2: reserved, zeroes
- * @crc: a CRC32 checksum of the record
- *
- * The volume table records are stored in the volume table, which is stored in
- * the layout volume. The layout volume consists of 2 logical eraseblock, each
- * of which contains a copy of the volume table (i.e., the volume table is
- * duplicated). The volume table is an array of &struct ubi_vtbl_record
- * objects indexed by the volume ID.
- *
- * If the size of the logical eraseblock is large enough to fit
- * %UBI_MAX_VOLUMES records, the volume table contains %UBI_MAX_VOLUMES
- * records. Otherwise, it contains as many records as it can fit (i.e., size of
- * logical eraseblock divided by sizeof(struct ubi_vtbl_record)).
- *
- * The @upd_marker flag is used to implement volume update. It is set to %1
- * before update and set to %0 after the update. So if the update operation was
- * interrupted, UBI knows that the volume is corrupted.
- *
- * The @alignment field is specified when the volume is created and cannot be
- * later changed. It may be useful, for example, when a block-oriented file
- * system works on top of UBI. The @data_pad field is calculated using the
- * logical eraseblock size and @alignment. The alignment must be multiple to the
- * minimal flash I/O unit. If @alignment is 1, all the available space of
- * the physical eraseblocks is used.
- *
- * Empty records contain all zeroes and the CRC checksum of those zeroes.
- */
-struct ubi_vtbl_record {
-	ubi32_t reserved_pebs;
-	ubi32_t alignment;
-	ubi32_t data_pad;
-	uint8_t vol_type;
-	uint8_t upd_marker;
-	ubi16_t name_len;
-	uint8_t name[UBI_VOL_NAME_MAX+1];
-	uint8_t padding2[24];
-	ubi32_t crc;
-} __attribute__ ((packed));
-
-#endif /* !__UBI_HEADER_H__ */
diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h
new file mode 100644
index 0000000000..a017891acf
--- /dev/null
+++ b/include/linux/mtd/ubi.h
@@ -0,0 +1,186 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem Bityutskiy (Битюцкий Артём)
+ */
+
+#ifndef __LINUX_UBI_H__
+#define __LINUX_UBI_H__
+
+//#include <asm/ioctl.h>
+#include <linux/types.h>
+#include <mtd/ubi-user.h>
+
+/*
+ * enum ubi_open_mode - UBI volume open mode constants.
+ *
+ * UBI_READONLY: read-only mode
+ * UBI_READWRITE: read-write mode
+ * UBI_EXCLUSIVE: exclusive mode
+ */
+enum {
+	UBI_READONLY = 1,
+	UBI_READWRITE,
+	UBI_EXCLUSIVE
+};
+
+/**
+ * struct ubi_volume_info - UBI volume description data structure.
+ * @vol_id: volume ID
+ * @ubi_num: UBI device number this volume belongs to
+ * @size: how many physical eraseblocks are reserved for this volume
+ * @used_bytes: how many bytes of data this volume contains
+ * @used_ebs: how many physical eraseblocks of this volume actually contain any
+ * data
+ * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
+ * @corrupted: non-zero if the volume is corrupted (static volumes only)
+ * @upd_marker: non-zero if the volume has update marker set
+ * @alignment: volume alignment
+ * @usable_leb_size: how many bytes are available in logical eraseblocks of
+ * this volume
+ * @name_len: volume name length
+ * @name: volume name
+ * @cdev: UBI volume character device major and minor numbers
+ *
+ * The @corrupted flag is only relevant to static volumes and is always zero
+ * for dynamic ones. This is because UBI does not care about dynamic volume
+ * data protection and only cares about protecting static volume data.
+ *
+ * The @upd_marker flag is set if the volume update operation was interrupted.
+ * Before touching the volume data during the update operation, UBI first sets
+ * the update marker flag for this volume. If the volume update operation was
+ * further interrupted, the update marker indicates this. If the update marker
+ * is set, the contents of the volume is certainly damaged and a new volume
+ * update operation has to be started.
+ *
+ * To put it differently, @corrupted and @upd_marker fields have different
+ * semantics:
+ *     o the @corrupted flag means that this static volume is corrupted for some
+ *       reasons, but not because an interrupted volume update
+ *     o the @upd_marker field means that the volume is damaged because of an
+ *       interrupted update operation.
+ *
+ * I.e., the @corrupted flag is never set if the @upd_marker flag is set.
+ *
+ * The @used_bytes and @used_ebs fields are only really needed for static
+ * volumes and contain the number of bytes stored in this static volume and how
+ * many eraseblock this data occupies. In case of dynamic volumes, the
+ * @used_bytes field is equivalent to @size*@usable_leb_size, and the @used_ebs
+ * field is equivalent to @size.
+ *
+ * In general, logical eraseblock size is a property of the UBI device, not
+ * of the UBI volume. Indeed, the logical eraseblock size depends on the
+ * physical eraseblock size and on how much bytes UBI headers consume. But
+ * because of the volume alignment (@alignment), the usable size of logical
+ * eraseblocks if a volume may be less. The following equation is true:
+ * 	@usable_leb_size = LEB size - (LEB size mod @alignment),
+ * where LEB size is the logical eraseblock size defined by the UBI device.
+ *
+ * The alignment is multiple to the minimal flash input/output unit size or %1
+ * if all the available space is used.
+ *
+ * To put this differently, alignment may be considered is a way to change
+ * volume logical eraseblock sizes.
+ */
+struct ubi_volume_info {
+	int ubi_num;
+	int vol_id;
+	int size;
+	long long used_bytes;
+	int used_ebs;
+	int vol_type;
+	int corrupted;
+	int upd_marker;
+	int alignment;
+	int usable_leb_size;
+	int name_len;
+	const char *name;
+	dev_t cdev;
+};
+
+/**
+ * struct ubi_device_info - UBI device description data structure.
+ * @ubi_num: ubi device number
+ * @leb_size: logical eraseblock size on this UBI device
+ * @min_io_size: minimal I/O unit size
+ * @ro_mode: if this device is in read-only mode
+ * @cdev: UBI character device major and minor numbers
+ *
+ * Note, @leb_size is the logical eraseblock size offered by the UBI device.
+ * Volumes of this UBI device may have smaller logical eraseblock size if their
+ * alignment is not equivalent to %1.
+ */
+struct ubi_device_info {
+	int ubi_num;
+	int leb_size;
+	int min_io_size;
+	int ro_mode;
+	dev_t cdev;
+};
+
+/* UBI descriptor given to users when they open UBI volumes */
+struct ubi_volume_desc;
+
+int ubi_get_device_info(int ubi_num, struct ubi_device_info *di);
+void ubi_get_volume_info(struct ubi_volume_desc *desc,
+			 struct ubi_volume_info *vi);
+struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode);
+struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name,
+					   int mode);
+void ubi_close_volume(struct ubi_volume_desc *desc);
+int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
+		 int len, int check);
+int ubi_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
+		  int offset, int len, int dtype);
+int ubi_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
+		   int len, int dtype);
+int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum);
+int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum);
+int ubi_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
+int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum);
+
+/*
+ * This function is the same as the 'ubi_leb_read()' function, but it does not
+ * provide the checking capability.
+ */
+static inline int ubi_read(struct ubi_volume_desc *desc, int lnum, char *buf,
+			   int offset, int len)
+{
+	return ubi_leb_read(desc, lnum, buf, offset, len, 0);
+}
+
+/*
+ * This function is the same as the 'ubi_leb_write()' functions, but it does
+ * not have the data type argument.
+ */
+static inline int ubi_write(struct ubi_volume_desc *desc, int lnum,
+			    const void *buf, int offset, int len)
+{
+	return ubi_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
+}
+
+/*
+ * This function is the same as the 'ubi_leb_change()' functions, but it does
+ * not have the data type argument.
+ */
+static inline int ubi_change(struct ubi_volume_desc *desc, int lnum,
+				    const void *buf, int len)
+{
+	return ubi_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
+}
+
+#endif /* !__LINUX_UBI_H__ */
diff --git a/include/linux/types.h b/include/linux/types.h
index df4808fcdf..1b0b4a44c4 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -119,6 +119,30 @@ typedef		__s64		int64_t;
  * Below are truly Linux-specific types that should never collide with
  * any application/library that wants linux/types.h.
  */
+#ifdef __CHECKER__
+#define __bitwise__ __attribute__((bitwise))
+#else
+#define __bitwise__
+#endif
+#ifdef __CHECK_ENDIAN__
+#define __bitwise __bitwise__
+#else
+#define __bitwise
+#endif
+
+typedef __u16 __bitwise __le16;
+typedef __u16 __bitwise __be16;
+typedef __u32 __bitwise __le32;
+typedef __u32 __bitwise __be32;
+#if defined(__GNUC__)
+typedef __u64 __bitwise __le64;
+typedef __u64 __bitwise __be64;
+#endif
+typedef __u16 __bitwise __sum16;
+typedef __u32 __bitwise __wsum;
+
+
+typedef unsigned __bitwise__	gfp_t;
 
 struct ustat {
 	__kernel_daddr_t	f_tfree;
diff --git a/include/linux/mtd/ubi-user.h b/include/mtd/ubi-user.h
index fe06ded0e6..a7421f130c 100644
--- a/include/linux/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -22,6 +22,21 @@
 #define __UBI_USER_H__
 
 /*
+ * UBI device creation (the same as MTD device attachment)
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * MTD devices may be attached using %UBI_IOCATT ioctl command of the UBI
+ * control device. The caller has to properly fill and pass
+ * &struct ubi_attach_req object - UBI will attach the MTD device specified in
+ * the request and return the newly created UBI device number as the ioctl
+ * return value.
+ *
+ * UBI device deletion (the same as MTD device detachment)
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * An UBI device maybe deleted with %UBI_IOCDET ioctl command of the UBI
+ * control device.
+ *
  * UBI volume creation
  * ~~~~~~~~~~~~~~~~~~~
  *
@@ -48,7 +63,7 @@
  *
  * Volume update should be done via the %UBI_IOCVOLUP IOCTL command of the
  * corresponding UBI volume character device. A pointer to a 64-bit update
- * size should be passed to the IOCTL. After then, UBI expects user to write
+ * size should be passed to the IOCTL. After this, UBI expects user to write
  * this number of bytes to the volume character device. The update is finished
  * when the claimed number of bytes is passed. So, the volume update sequence
  * is something like:
@@ -57,14 +72,24 @@
  * ioctl(fd, UBI_IOCVOLUP, &image_size);
  * write(fd, buf, image_size);
  * close(fd);
+ *
+ * Atomic eraseblock change
+ * ~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * Atomic eraseblock change operation is done via the %UBI_IOCEBCH IOCTL
+ * command of the corresponding UBI volume character device. A pointer to
+ * &struct ubi_leb_change_req has to be passed to the IOCTL. Then the user is
+ * expected to write the requested amount of bytes. This is similar to the
+ * "volume update" IOCTL.
  */
 
 /*
- * When a new volume is created, users may either specify the volume number they
- * want to create or to let UBI automatically assign a volume number using this
- * constant.
+ * When a new UBI volume or UBI device is created, users may either specify the
+ * volume/device number they want to create or to let UBI automatically assign
+ * the number using these constants.
  */
 #define UBI_VOL_NUM_AUTO (-1)
+#define UBI_DEV_NUM_AUTO (-1)
 
 /* Maximum volume name length */
 #define UBI_MAX_VOLUME_NAME 127
@@ -80,6 +105,15 @@
 /* Re-size an UBI volume */
 #define UBI_IOCRSVOL _IOW(UBI_IOC_MAGIC, 2, struct ubi_rsvol_req)
 
+/* IOCTL commands of the UBI control character device */
+
+#define UBI_CTRL_IOC_MAGIC 'o'
+
+/* Attach an MTD device */
+#define UBI_IOCATT _IOW(UBI_CTRL_IOC_MAGIC, 64, struct ubi_attach_req)
+/* Detach an MTD device */
+#define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, int32_t)
+
 /* IOCTL commands of UBI volume character devices */
 
 #define UBI_VOL_IOC_MAGIC 'O'
@@ -88,6 +122,28 @@
 #define UBI_IOCVOLUP _IOW(UBI_VOL_IOC_MAGIC, 0, int64_t)
 /* An eraseblock erasure command, used for debugging, disabled by default */
 #define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t)
+/* An atomic eraseblock change command */
+#define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t)
+
+/* Maximum MTD device name length supported by UBI */
+#define MAX_UBI_MTD_NAME_LEN 127
+
+/*
+ * UBI data type hint constants.
+ *
+ * UBI_LONGTERM: long-term data
+ * UBI_SHORTTERM: short-term data
+ * UBI_UNKNOWN: data persistence is unknown
+ *
+ * These constants are used when data is written to UBI volumes in order to
+ * help the UBI wear-leveling unit to find more appropriate physical
+ * eraseblocks.
+ */
+enum {
+	UBI_LONGTERM  = 1,
+	UBI_SHORTTERM = 2,
+	UBI_UNKNOWN   = 3,
+};
 
 /*
  * UBI volume type constants.
@@ -97,22 +153,58 @@
  */
 enum {
 	UBI_DYNAMIC_VOLUME = 3,
-	UBI_STATIC_VOLUME = 4
+	UBI_STATIC_VOLUME  = 4,
+};
+
+/**
+ * struct ubi_attach_req - attach MTD device request.
+ * @ubi_num: UBI device number to create
+ * @mtd_num: MTD device number to attach
+ * @vid_hdr_offset: VID header offset (use defaults if %0)
+ * @padding: reserved for future, not used, has to be zeroed
+ *
+ * This data structure is used to specify MTD device UBI has to attach and the
+ * parameters it has to use. The number which should be assigned to the new UBI
+ * device is passed in @ubi_num. UBI may automatically assign the number if
+ * @UBI_DEV_NUM_AUTO is passed. In this case, the device number is returned in
+ * @ubi_num.
+ *
+ * Most applications should pass %0 in @vid_hdr_offset to make UBI use default
+ * offset of the VID header within physical eraseblocks. The default offset is
+ * the next min. I/O unit after the EC header. For example, it will be offset
+ * 512 in case of a 512 bytes page NAND flash with no sub-page support. Or
+ * it will be 512 in case of a 2KiB page NAND flash with 4 512-byte sub-pages.
+ *
+ * But in rare cases, if this optimizes things, the VID header may be placed to
+ * a different offset. For example, the boot-loader might do things faster if the
+ * VID header sits at the end of the first 2KiB NAND page with 4 sub-pages. As
+ * the boot-loader would not normally need to read EC headers (unless it needs
+ * UBI in RW mode), it might be faster to calculate ECC. This is weird example,
+ * but it real-life example. So, in this example, @vid_hdr_offer would be
+ * 2KiB-64 bytes = 1984. Note, that this position is not even 512-bytes
+ * aligned, which is OK, as UBI is clever enough to realize this is 4th sub-page
+ * of the first page and add needed padding.
+ */
+struct ubi_attach_req {
+	int32_t ubi_num;
+	int32_t mtd_num;
+	int32_t vid_hdr_offset;
+	uint8_t padding[12];
 };
 
 /**
  * struct ubi_mkvol_req - volume description data structure used in
- * volume creation requests.
+ *                        volume creation requests.
  * @vol_id: volume number
  * @alignment: volume alignment
  * @bytes: volume size in bytes
  * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
- * @padding1: reserved for future, not used
+ * @padding1: reserved for future, not used, has to be zeroed
  * @name_len: volume name length
- * @padding2: reserved for future, not used
+ * @padding2: reserved for future, not used, has to be zeroed
  * @name: volume name
  *
- * This structure is used by userspace programs when creating new volumes. The
+ * This structure is used by user-space programs when creating new volumes. The
  * @used_bytes field is only necessary when creating static volumes.
  *
  * The @alignment field specifies the required alignment of the volume logical
@@ -139,7 +231,7 @@ struct ubi_mkvol_req {
 	int8_t padding1;
 	int16_t name_len;
 	int8_t padding2[4];
-	char name[UBI_MAX_VOLUME_NAME+1];
+	char name[UBI_MAX_VOLUME_NAME + 1];
 } __attribute__ ((packed));
 
 /**
@@ -158,4 +250,19 @@ struct ubi_rsvol_req {
 	int32_t vol_id;
 } __attribute__ ((packed));
 
+/**
+ * struct ubi_leb_change_req - a data structure used in atomic logical
+ *                             eraseblock change requests.
+ * @lnum: logical eraseblock number to change
+ * @bytes: how many bytes will be written to the logical eraseblock
+ * @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN)
+ * @padding: reserved for future, not used, has to be zeroed
+ */
+struct ubi_leb_change_req {
+	int32_t lnum;
+	int32_t bytes;
+	uint8_t dtype;
+	uint8_t padding[7];
+} __attribute__ ((packed));
+
 #endif /* __UBI_USER_H__ */
diff --git a/include/ubi_uboot.h b/include/ubi_uboot.h
new file mode 100644
index 0000000000..295f2c0ffc
--- /dev/null
+++ b/include/ubi_uboot.h
@@ -0,0 +1,217 @@
+/*
+ * Header file for UBI support for U-Boot
+ *
+ * Adaptation from kernel to U-Boot
+ *
+ *  Copyright (C) 2005-2007 Samsung Electronics
+ *  Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * 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.
+ */
+
+#ifndef __UBOOT_UBI_H
+#define __UBOOT_UBI_H
+
+#include <common.h>
+#include <malloc.h>
+#include <div64.h>
+#include <linux/crc32.h>
+#include <linux/mtd/mtd.h>
+
+#ifdef CONFIG_CMD_ONENAND
+#include <onenand_uboot.h>
+#endif
+
+#include <asm/errno.h>
+
+#define DPRINTK(format, args...)					\
+do {									\
+	printf("%s[%d]: " format "\n", __func__, __LINE__, ##args);	\
+} while (0)
+
+/* configurable */
+#define CONFIG_MTD_UBI_WL_THRESHOLD	4096
+#define CONFIG_MTD_UBI_BEB_RESERVE	1
+#define UBI_IO_DEBUG			0
+
+/* debug options (Linux: drivers/mtd/ubi/Kconfig.debug) */
+#undef CONFIG_MTD_UBI_DEBUG
+#undef CONFIG_MTD_UBI_DEBUG_PARANOID
+#undef CONFIG_MTD_UBI_DEBUG_MSG
+#undef CONFIG_MTD_UBI_DEBUG_MSG_EBA
+#undef CONFIG_MTD_UBI_DEBUG_MSG_WL
+#undef CONFIG_MTD_UBI_DEBUG_MSG_IO
+#undef CONFIG_MTD_UBI_DEBUG_MSG_BLD
+#define CONFIG_MTD_UBI_DEBUG_DISABLE_BGT
+
+/* compiler options */
+#define uninitialized_var(x)		x = x
+
+/* build.c */
+#define get_device(...)
+#define put_device(...)
+#define ubi_sysfs_init(...)		0
+#define ubi_sysfs_close(...)		do { } while (0)
+static inline int is_power_of_2(unsigned long n)
+{
+        return (n != 0 && ((n & (n - 1)) == 0));
+}
+
+/* FIXME */
+#define MKDEV(...)			0
+#define MAJOR(dev)			0
+#define MINOR(dev)			0
+
+#define alloc_chrdev_region(...)	0
+#define unregister_chrdev_region(...)
+
+#define class_create(...)		__builtin_return_address(0)
+#define class_create_file(...)		0
+#define class_remove_file(...)
+#define class_destroy(...)
+#define misc_register(...)		0
+#define misc_deregister(...)
+
+/* vmt.c */
+#define device_register(...)		0
+#define volume_sysfs_init(...)		0
+#define volume_sysfs_close(...)		do { } while (0)
+
+/* kapi.c */
+
+/* eba.c */
+
+/* io.c */
+#define init_waitqueue_head(...)	do { } while (0)
+#define wait_event_interruptible(...)	0
+#define wake_up_interruptible(...)	do { } while (0)
+#define print_hex_dump(...)		do { } while (0)
+#define dump_stack(...)			do { } while (0)
+
+/* wl.c */
+#define task_pid_nr(x)			0
+#define set_freezable(...)		do { } while (0)
+#define try_to_freeze(...)		0
+#define set_current_state(...)		do { } while (0)
+#define kthread_should_stop(...)	0
+#define schedule()			do { } while (0)
+
+/* upd.c */
+static inline unsigned long copy_from_user(void *dest, const void *src,
+					   unsigned long count)
+{
+	memcpy((void *)dest, (void *)src, count);
+	return 0;
+}
+
+/* common */
+typedef int	spinlock_t;
+typedef int	wait_queue_head_t;
+#define spin_lock_init(...)
+#define spin_lock(...)
+#define spin_unlock(...)
+
+#define mutex_init(...)
+#define mutex_lock(...)
+#define mutex_unlock(...)
+
+#define init_rwsem(...)			do { } while (0)
+#define down_read(...)			do { } while (0)
+#define down_write(...)			do { } while (0)
+#define down_write_trylock(...)		0
+#define up_read(...)			do { } while (0)
+#define up_write(...)			do { } while (0)
+
+struct kmem_cache { int i; };
+#define kmem_cache_create(...)		1
+#define kmem_cache_alloc(obj, gfp)	malloc(sizeof(struct ubi_wl_entry))
+#define kmem_cache_free(obj, size)	free(size)
+#define kmem_cache_destroy(...)
+
+#define cond_resched()			do { } while (0)
+#define yield()				do { } while (0)
+
+#define KERN_WARNING
+#define KERN_ERR
+#define KERN_NOTICE
+#define KERN_DEBUG
+
+#define GFP_KERNEL			0
+#define GFP_NOFS			1
+
+#define __user
+#define __init
+#define __exit
+
+#define kthread_create(...)	__builtin_return_address(0)
+#define kthread_stop(...)	do { } while (0)
+#define wake_up_process(...)	do { } while (0)
+
+#define BUS_ID_SIZE		20
+
+struct rw_semaphore { int i; };
+struct device {
+	struct device		*parent;
+	struct class		*class;
+	char	bus_id[BUS_ID_SIZE];	/* position on parent bus */
+	dev_t			devt;	/* dev_t, creates the sysfs "dev" */
+	void	(*release)(struct device *dev);
+};
+struct mutex { int i; };
+struct kernel_param { int i; };
+
+struct cdev {
+	int owner;
+	dev_t dev;
+};
+#define cdev_init(...)		do { } while (0)
+#define cdev_add(...)		0
+#define cdev_del(...)		do { } while (0)
+
+#define MAX_ERRNO		4095
+#define IS_ERR_VALUE(x)		((x) >= (unsigned long)-MAX_ERRNO)
+
+static inline void *ERR_PTR(long error)
+{
+	return (void *) error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+	return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+	return IS_ERR_VALUE((unsigned long)ptr);
+}
+
+/* Force a compilation error if condition is true */
+#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
+
+/* module */
+#define THIS_MODULE		0
+#define try_module_get(...)	0
+#define module_put(...)		do { } while (0)
+#define module_init(...)
+#define module_exit(...)
+#define EXPORT_SYMBOL(...)
+#define EXPORT_SYMBOL_GPL(...)
+#define module_param_call(...)
+#define MODULE_PARM_DESC(...)
+#define MODULE_VERSION(...)
+#define MODULE_DESCRIPTION(...)
+#define MODULE_AUTHOR(...)
+#define MODULE_LICENSE(...)
+
+#include "../drivers/mtd/ubi/ubi.h"
+
+/* functions */
+extern int ubi_mtd_param_parse(const char *val, struct kernel_param *kp);
+extern int ubi_init(void);
+
+extern struct ubi_device *ubi_devices[];
+
+#endif