made ext4 and new general ls/load commands work

20 files changed, 2459 insertions, 493 deletions

diff --git a/u-boot/Makefile b/u-boot/Makefile
index dc2e3d8..ca4b915 100644
--- a/u-boot/Makefile
+++ b/u-boot/Makefile
@@ -193,8 +193,9 @@ ifeq ($(CPU),ixp)
 LIBS += arch/arm/cpu/ixp/npe/libnpe.o
 endif
 LIBS += arch/$(ARCH)/lib/lib$(ARCH).o
+LIBS += fs/fs.o
 LIBS += fs/cramfs/libcramfs.o fs/fat/libfat.o fs/fdos/libfdos.o fs/jffs2/libjffs2.o \
-	fs/reiserfs/libreiserfs.o fs/ext2/libext2fs.o fs/yaffs2/libyaffs2.o \
+	fs/reiserfs/libreiserfs.o fs/ext2/libext2fs.o fs/ext4/libext4fs.o fs/yaffs2/libyaffs2.o \
 	fs/ubifs/libubifs.o
 LIBS += net/libnet.o
 LIBS += disk/libdisk.o
diff --git a/u-boot/common/Makefile b/u-boot/common/Makefile
index 048df0c..121a47f 100644
--- a/u-boot/common/Makefile
+++ b/u-boot/common/Makefile
@@ -89,7 +89,9 @@ COBJS-$(CONFIG_ENV_IS_IN_EEPROM) += cmd_eeprom.o
 COBJS-$(CONFIG_CMD_EEPROM) += cmd_eeprom.o
 COBJS-$(CONFIG_CMD_ELF) += cmd_elf.o
 COBJS-$(CONFIG_SYS_HUSH_PARSER) += cmd_exit.o
+COBJS-$(CONFIG_CMD_FS) += cmd_fs.o
 COBJS-$(CONFIG_CMD_EXT2) += cmd_ext2.o
+COBJS-$(CONFIG_CMD_EXT4) += cmd_ext4.o
 COBJS-$(CONFIG_CMD_FAT) += cmd_fat.o
 COBJS-$(CONFIG_CMD_FDC)$(CONFIG_CMD_FDOS) += cmd_fdc.o
 COBJS-$(CONFIG_OF_LIBFDT) += cmd_fdt.o fdt_support.o
diff --git a/u-boot/common/cmd_fat.c b/u-boot/common/cmd_fat.c
index 0220494..86be044 100644..100755
--- a/u-boot/common/cmd_fat.c
+++ b/u-boot/common/cmd_fat.c
@@ -31,146 +31,57 @@
 #include <ata.h>
 #include <part.h>
 #include <fat.h>
-
+#include <fs.h>
 
 int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
-	long size;
-	unsigned long offset;
-	unsigned long count;
-	char buf [12];
-	block_dev_desc_t *dev_desc=NULL;
-	int dev=0;
-	int part=1;
-	char *ep;
-
-	if (argc < 5) {
-		printf( "usage: fatload <interface> <dev[:part]> "
-			"<addr> <filename> [bytes]\n");
-		return 1;
-	}
-
-	dev = (int)simple_strtoul(argv[2], &ep, 16);
-	dev_desc = get_dev(argv[1],dev);
-	if (dev_desc == NULL) {
-		puts("\n** Invalid boot device **\n");
-		return 1;
-	}
-	if (*ep) {
-		if (*ep != ':') {
-			puts("\n** Invalid boot device, use `dev[:part]' **\n");
-			return 1;
-		}
-		part = (int)simple_strtoul(++ep, NULL, 16);
-	}
-	if (fat_register_device(dev_desc,part)!=0) {
-		printf("\n** Unable to use %s %d:%d for fatload **\n",
-			argv[1], dev, part);
-		return 1;
-	}
-	offset = simple_strtoul(argv[3], NULL, 16);
-	if (argc == 6)
-		count = simple_strtoul(argv[5], NULL, 16);
-	else
-		count = 0;
-	size = file_fat_read(argv[4], (unsigned char *)offset, count);
-
-	if(size==-1) {
-		printf("\n** Unable to read \"%s\" from %s %d:%d **\n",
-			argv[4], argv[1], dev, part);
-		return 1;
-	}
-
-	printf("\n%ld bytes read\n", size);
-
-	sprintf(buf, "%lX", size);
-	setenv("filesize", buf);
-
-	return 0;
+	return do_load(cmdtp, flag, argc, argv, FS_TYPE_FAT, 16);
 }
 
 
 U_BOOT_CMD(
-	fatload,	6,	0,	do_fat_fsload,
+	fatload,	7,	0,	do_fat_fsload,
 	"load binary file from a dos filesystem",
-	"<interface> <dev[:part]>  <addr> <filename> [bytes]\n"
-	"    - load binary file 'filename' from 'dev' on 'interface'\n"
-	"      to address 'addr' from dos filesystem"
+	"<interface> [<dev[:part]>]  <addr> <filename> [bytes [pos]]\n"
+	"    - Load binary file 'filename' from 'dev' on 'interface'\n"
+	"      to address 'addr' from dos filesystem.\n"
+	"      'pos' gives the file position to start loading from.\n"
+	"      If 'pos' is omitted, 0 is used. 'pos' requires 'bytes'.\n"
+	"      'bytes' gives the size to load. If 'bytes' is 0 or omitted,\n"
+	"      the load stops on end of file.\n"
+	"      All numeric parameters are assumed to be hex."
 );
 
-int do_fat_ls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_fat_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
-	char *filename = "/";
-	int ret;
-	int dev=0;
-	int part=1;
-	char *ep;
-	block_dev_desc_t *dev_desc=NULL;
-
-	if (argc < 3) {
-		printf("usage: fatls <interface> <dev[:part]> [directory]\n");
-		return 0;
-	}
-	dev = (int)simple_strtoul(argv[2], &ep, 16);
-	dev_desc = get_dev(argv[1],dev);
-	if (dev_desc == NULL) {
-		puts("\n** Invalid boot device **\n");
-		return 1;
-	}
-	if (*ep) {
-		if (*ep != ':') {
-			puts("\n** Invalid boot device, use `dev[:part]' **\n");
-			return 1;
-		}
-		part = (int)simple_strtoul(++ep, NULL, 16);
-	}
-	if (fat_register_device(dev_desc,part)!=0) {
-		printf("\n** Unable to use %s %d:%d for fatls **\n",
-			argv[1], dev, part);
-		return 1;
-	}
-	if (argc == 4)
-		ret = file_fat_ls(argv[3]);
-	else
-		ret = file_fat_ls(filename);
-
-	if(ret!=0)
-		printf("No Fat FS detected\n");
-	return ret;
+	return do_ls(cmdtp, flag, argc, argv, FS_TYPE_FAT);
 }
 
 U_BOOT_CMD(
 	fatls,	4,	1,	do_fat_ls,
 	"list files in a directory (default /)",
-	"<interface> <dev[:part]> [directory]\n"
+	"<interface> [<dev[:part]>] [directory]\n"
 	"    - list files from 'dev' on 'interface' in a 'directory'"
 );
 
-int do_fat_fsinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_fat_fsinfo(cmd_tbl_t *cmdtp, int flag, int argc,
+			 char * const argv[])
 {
-	int dev=0;
-	int part=1;
-	char *ep;
-	block_dev_desc_t *dev_desc=NULL;
+	int dev, part;
+	block_dev_desc_t *dev_desc;
+	disk_partition_t info;
 
 	if (argc < 2) {
-		printf("usage: fatinfo <interface> <dev[:part]>\n");
+		printf("usage: fatinfo <interface> [<dev[:part]>]\n");
 		return 0;
 	}
-	dev = (int)simple_strtoul(argv[2], &ep, 16);
-	dev_desc = get_dev(argv[1],dev);
-	if (dev_desc == NULL) {
-		puts("\n** Invalid boot device **\n");
+
+	part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
+	if (part < 0)
 		return 1;
-	}
-	if (*ep) {
-		if (*ep != ':') {
-			puts("\n** Invalid boot device, use `dev[:part]' **\n");
-			return 1;
-		}
-		part = (int)simple_strtoul(++ep, NULL, 16);
-	}
-	if (fat_register_device(dev_desc,part)!=0) {
+
+	dev = dev_desc->dev;
+	if (fat_set_blk_dev(dev_desc, &info) != 0) {
 		printf("\n** Unable to use %s %d:%d for fatinfo **\n",
 			argv[1], dev, part);
 		return 1;
@@ -181,6 +92,56 @@ int do_fat_fsinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 U_BOOT_CMD(
 	fatinfo,	3,	1,	do_fat_fsinfo,
 	"print information about filesystem",
-	"<interface> <dev[:part]>\n"
+	"<interface> [<dev[:part]>]\n"
 	"    - print information about filesystem from 'dev' on 'interface'"
 );
+
+#ifdef CONFIG_FAT_WRITE
+static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
+		int argc, char * const argv[])
+{
+	long size;
+	unsigned long addr;
+	unsigned long count;
+	block_dev_desc_t *dev_desc = NULL;
+	disk_partition_t info;
+	int dev = 0;
+	int part = 1;
+
+	if (argc < 5)
+		return cmd_usage(cmdtp);
+
+	part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
+	if (part < 0)
+		return 1;
+
+	dev = dev_desc->dev;
+
+	if (fat_set_blk_dev(dev_desc, &info) != 0) {
+		printf("\n** Unable to use %s %d:%d for fatwrite **\n",
+			argv[1], dev, part);
+		return 1;
+	}
+	addr = simple_strtoul(argv[3], NULL, 16);
+	count = simple_strtoul(argv[5], NULL, 16);
+
+	size = file_fat_write(argv[4], (void *)addr, count);
+	if (size == -1) {
+		printf("\n** Unable to write \"%s\" from %s %d:%d **\n",
+			argv[4], argv[1], dev, part);
+		return 1;
+	}
+
+	printf("%ld bytes written\n", size);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	fatwrite,	6,	0,	do_fat_fswrite,
+	"write file into a dos filesystem",
+	"<interface> <dev[:part]> <addr> <filename> <bytes>\n"
+	"    - write file 'filename' from the address 'addr' in RAM\n"
+	"      to 'dev' on 'interface'"
+);
+#endif
diff --git a/u-boot/common/cmd_fs.c b/u-boot/common/cmd_fs.c
new file mode 100755
index 0000000..a681d03
--- /dev/null
+++ b/u-boot/common/cmd_fs.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Inspired by cmd_ext_common.c, cmd_fat.c.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <fs.h>
+
+int do_load_wrapper(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	return do_load(cmdtp, flag, argc, argv, FS_TYPE_ANY, 0);
+}
+
+U_BOOT_CMD(
+	load,	7,	0,	do_load_wrapper,
+	"load binary file from a filesystem",
+	"<interface> [<dev[:part]> [<addr> [<filename> [bytes [pos]]]]]\n"
+	"    - Load binary file 'filename' from partition 'part' on device\n"
+	"       type 'interface' instance 'dev' to address 'addr' in memory.\n"
+	"      'bytes' gives the size to load in bytes.\n"
+	"      If 'bytes' is 0 or omitted, the file is read until the end.\n"
+	"      'pos' gives the file byte position to start reading from.\n"
+	"      If 'pos' is 0 or omitted, the file is read from the start.\n"
+	"      All numeric parameters are assumed to be decimal,\n"
+	"      unless specified otherwise using a leading \"0x\"."
+);
+
+int do_ls_wrapper(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	return do_ls(cmdtp, flag, argc, argv, FS_TYPE_ANY);
+}
+
+U_BOOT_CMD(
+	ls,	4,	1,	do_ls_wrapper,
+	"list files in a directory (default /)",
+	"<interface> [<dev[:part]> [directory]]\n"
+	"    - List files in directory 'directory' of partition 'part' on\n"
+	"      device type 'interface' instance 'dev'."
+);
diff --git a/u-boot/common/cmd_jffs2.c b/u-boot/common/cmd_jffs2.c
index 27296dd..5843de8 100644
--- a/u-boot/common/cmd_jffs2.c
+++ b/u-boot/common/cmd_jffs2.c
@@ -617,21 +617,21 @@ int do_jffs2_fsinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 /***************************************************/
 U_BOOT_CMD(
-	fsload,	3,	0,	do_jffs2_fsload,
-	"load binary file from a filesystem image",
+	jcload,	3,	0,	do_jffs2_fsload,
+	"load binary file from a JFFS2/CRAMFS filesystem image",
 	"[ off ] [ filename ]\n"
 	"    - load binary file from flash bank\n"
 	"      with offset 'off'"
 );
 U_BOOT_CMD(
-	ls,	2,	1,	do_jffs2_ls,
-	"list files in a directory (default /)",
+	jcls,	2,	1,	do_jffs2_ls,
+	"list files in a JFFS2/CRAMFS directory (default /)",
 	"[ directory ]"
 );
 
 U_BOOT_CMD(
-	fsinfo,	1,	1,	do_jffs2_fsinfo,
-	"print information about filesystems",
+	jcinfo,	1,	1,	do_jffs2_fsinfo,
+	"print information about JFFS2/CRAMFS filesystems",
 	""
 );
 /***************************************************/
diff --git a/u-boot/disk/part.c b/u-boot/disk/part.c
index 13723f2..4646f68 100644..100755
--- a/u-boot/disk/part.c
+++ b/u-boot/disk/part.c
@@ -24,6 +24,7 @@
 #include <common.h>
 #include <command.h>
 #include <ide.h>
+#include <malloc.h>
 #include <part.h>
 
 #undef	PART_DEBUG
@@ -34,13 +35,15 @@
 #define PRINTF(fmt,args...)
 #endif
 
+/* Rather than repeat this expression each time, add a define for it */
 #if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_MG_DISK) || \
      defined(CONFIG_CMD_SATA) || \
      defined(CONFIG_CMD_SCSI) || \
      defined(CONFIG_CMD_USB) || \
      defined(CONFIG_MMC) || \
      defined(CONFIG_SYSTEMACE) )
+#define HAVE_BLOCK_DEVICE
+#endif
 
 struct block_drvr {
 	char *name;
@@ -66,25 +69,26 @@ static const struct block_drvr block_drvr[] = {
 #if defined(CONFIG_SYSTEMACE)
 	{ .name = "ace", .get_dev = systemace_get_dev, },
 #endif
-#if defined(CONFIG_CMD_MG_DISK)
-	{ .name = "mgd", .get_dev = mg_disk_get_dev, },
-#endif
 	{ },
 };
 
 DECLARE_GLOBAL_DATA_PTR;
 
-block_dev_desc_t *get_dev(char* ifname, int dev)
+#ifdef HAVE_BLOCK_DEVICE
+block_dev_desc_t *get_dev(const char *ifname, int dev)
 {
 	const struct block_drvr *drvr = block_drvr;
 	block_dev_desc_t* (*reloc_get_dev)(int dev);
 	char *name;
 
+	if (!ifname)
+		return NULL;
+
 	name = drvr->name;
 #ifdef CONFIG_NEEDS_MANUAL_RELOC
 	name += gd->reloc_off;
 #endif
-	while (name) {
+	while (drvr->name) {
 		name = drvr->name;
 		reloc_get_dev = drvr->get_dev;
 #ifdef CONFIG_NEEDS_MANUAL_RELOC
@@ -98,19 +102,13 @@ block_dev_desc_t *get_dev(char* ifname, int dev)
 	return NULL;
 }
 #else
-block_dev_desc_t *get_dev(char* ifname, int dev)
+block_dev_desc_t *get_dev(const char *ifname, int dev)
 {
 	return NULL;
 }
 #endif
 
-#if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_MG_DISK) || \
-     defined(CONFIG_CMD_SATA) || \
-     defined(CONFIG_CMD_SCSI) || \
-     defined(CONFIG_CMD_USB) || \
-     defined(CONFIG_MMC) || \
-     defined(CONFIG_SYSTEMACE) )
+#ifdef HAVE_BLOCK_DEVICE
 
 /* ------------------------------------------------------------------------- */
 /*
@@ -240,19 +238,7 @@ void dev_print (block_dev_desc_t *dev_desc)
 }
 #endif
 
-#if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_MG_DISK) || \
-     defined(CONFIG_CMD_SATA) || \
-     defined(CONFIG_CMD_SCSI) || \
-     defined(CONFIG_CMD_USB) || \
-     defined(CONFIG_MMC)		|| \
-     defined(CONFIG_SYSTEMACE) )
-
-#if defined(CONFIG_MAC_PARTITION) || \
-    defined(CONFIG_DOS_PARTITION) || \
-    defined(CONFIG_ISO_PARTITION) || \
-    defined(CONFIG_AMIGA_PARTITION) || \
-    defined(CONFIG_EFI_PARTITION)
+#ifdef HAVE_BLOCK_DEVICE
 
 void init_part (block_dev_desc_t * dev_desc)
 {
@@ -291,63 +277,15 @@ void init_part (block_dev_desc_t * dev_desc)
 	    return;
 	}
 #endif
+	dev_desc->part_type = PART_TYPE_UNKNOWN;
 }
 
 
-int get_partition_info (block_dev_desc_t *dev_desc, int part
-					, disk_partition_t *info)
-{
-	switch (dev_desc->part_type) {
-#ifdef CONFIG_MAC_PARTITION
-	case PART_TYPE_MAC:
-		if (get_partition_info_mac(dev_desc,part,info) == 0) {
-			PRINTF ("## Valid MAC partition found ##\n");
-			return (0);
-		}
-		break;
-#endif
-
-#ifdef CONFIG_DOS_PARTITION
-	case PART_TYPE_DOS:
-		if (get_partition_info_dos(dev_desc,part,info) == 0) {
-			PRINTF ("## Valid DOS partition found ##\n");
-			return (0);
-		}
-		break;
-#endif
-
-#ifdef CONFIG_ISO_PARTITION
-	case PART_TYPE_ISO:
-		if (get_partition_info_iso(dev_desc,part,info) == 0) {
-			PRINTF ("## Valid ISO boot partition found ##\n");
-			return (0);
-		}
-		break;
-#endif
-
-#ifdef CONFIG_AMIGA_PARTITION
-	case PART_TYPE_AMIGA:
-	    if (get_partition_info_amiga(dev_desc, part, info) == 0)
-	    {
-		PRINTF ("## Valid Amiga partition found ##\n");
-		return (0);
-	    }
-	    break;
-#endif
-
-#ifdef CONFIG_EFI_PARTITION
-	case PART_TYPE_EFI:
-		if (get_partition_info_efi(dev_desc,part,info) == 0) {
-			PRINTF ("## Valid EFI partition found ##\n");
-			return (0);
-		}
-		break;
-#endif
-	default:
-		break;
-	}
-	return (-1);
-}
+#if defined(CONFIG_MAC_PARTITION) || \
+	defined(CONFIG_DOS_PARTITION) || \
+	defined(CONFIG_ISO_PARTITION) || \
+	defined(CONFIG_AMIGA_PARTITION) || \
+	defined(CONFIG_EFI_PARTITION)
 
 static void print_part_header (const char *type, block_dev_desc_t * dev_desc)
 {
@@ -382,6 +320,8 @@ static void print_part_header (const char *type, block_dev_desc_t * dev_desc)
 			dev_desc->dev, type);
 }
 
+#endif /* any CONFIG_..._PARTITION */
+
 void print_part (block_dev_desc_t * dev_desc)
 {
 
@@ -428,11 +368,266 @@ void print_part (block_dev_desc_t * dev_desc)
 	puts ("## Unknown partition table\n");
 }
 
+#endif /* HAVE_BLOCK_DEVICE */
 
-#else	/* neither MAC nor DOS nor ISO nor AMIGA nor EFI partition configured */
-# error neither CONFIG_MAC_PARTITION nor CONFIG_DOS_PARTITION
-# error nor CONFIG_ISO_PARTITION nor CONFIG_AMIGA_PARTITION
-# error nor CONFIG_EFI_PARTITION configured!
+int get_partition_info(block_dev_desc_t *dev_desc, int part
+					, disk_partition_t *info)
+{
+#ifdef HAVE_BLOCK_DEVICE
+
+#ifdef CONFIG_PARTITION_UUIDS
+	/* The common case is no UUID support */
+	info->uuid[0] = 0;
 #endif
 
+	switch (dev_desc->part_type) {
+#ifdef CONFIG_MAC_PARTITION
+	case PART_TYPE_MAC:
+		if (get_partition_info_mac(dev_desc, part, info) == 0) {
+			PRINTF("## Valid MAC partition found ##\n");
+			return 0;
+		}
+		break;
 #endif
+
+#ifdef CONFIG_DOS_PARTITION
+	case PART_TYPE_DOS:
+		if (get_partition_info_dos(dev_desc, part, info) == 0) {
+			PRINTF("## Valid DOS partition found ##\n");
+			return 0;
+		}
+		break;
+#endif
+
+#ifdef CONFIG_ISO_PARTITION
+	case PART_TYPE_ISO:
+		if (get_partition_info_iso(dev_desc, part, info) == 0) {
+			PRINTF("## Valid ISO boot partition found ##\n");
+			return 0;
+		}
+		break;
+#endif
+
+#ifdef CONFIG_AMIGA_PARTITION
+	case PART_TYPE_AMIGA:
+		if (get_partition_info_amiga(dev_desc, part, info) == 0) {
+			PRINTF("## Valid Amiga partition found ##\n");
+			return 0;
+		}
+		break;
+#endif
+
+#ifdef CONFIG_EFI_PARTITION
+	case PART_TYPE_EFI:
+		if (get_partition_info_efi(dev_desc, part, info) == 0) {
+			PRINTF("## Valid EFI partition found ##\n");
+			return 0;
+		}
+		break;
+#endif
+	default:
+		break;
+	}
+#endif /* HAVE_BLOCK_DEVICE */
+
+	return -1;
+}
+
+int get_device(const char *ifname, const char *dev_str,
+	       block_dev_desc_t **dev_desc)
+{
+	char *ep;
+	int dev;
+
+	dev = simple_strtoul(dev_str, &ep, 16);
+	if (*ep) {
+		printf("** Bad device specification %s %s **\n",
+		       ifname, dev_str);
+		return -1;
+	}
+
+	*dev_desc = get_dev(ifname, dev);
+	if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
+		printf("** Bad device %s %s **\n", ifname, dev_str);
+		return -1;
+	}
+
+	return dev;
+}
+
+#define PART_UNSPECIFIED -2
+#define PART_AUTO -1
+#define MAX_SEARCH_PARTITIONS 16
+int get_device_and_partition(const char *ifname, const char *dev_part_str,
+			     block_dev_desc_t **dev_desc,
+			     disk_partition_t *info, int allow_whole_dev)
+{
+	int ret = -1;
+	const char *part_str;
+	char *dup_str = NULL;
+	const char *dev_str;
+	int dev;
+	char *ep;
+	int p;
+	int part;
+	disk_partition_t tmpinfo;
+
+	/* If no dev_part_str, use bootdevice environment variable */
+	if (!dev_part_str || !strlen(dev_part_str) ||
+	    !strcmp(dev_part_str, "-"))
+		dev_part_str = getenv("bootdevice");
+
+	/* If still no dev_part_str, it's an error */
+	if (!dev_part_str) {
+		printf("** No device specified **\n");
+		goto cleanup;
+	}
+
+	/* Separate device and partition ID specification */
+	part_str = strchr(dev_part_str, ':');
+	if (part_str) {
+		dup_str = strdup(dev_part_str);
+		dup_str[part_str - dev_part_str] = 0;
+		dev_str = dup_str;
+		part_str++;
+	} else {
+		dev_str = dev_part_str;
+	}
+
+	/* Look up the device */
+	dev = get_device(ifname, dev_str, dev_desc);
+	if (dev < 0)
+		goto cleanup;
+
+	/* Convert partition ID string to number */
+	if (!part_str || !*part_str) {
+		part = PART_UNSPECIFIED;
+	} else if (!strcmp(part_str, "auto")) {
+		part = PART_AUTO;
+	} else {
+		/* Something specified -> use exactly that */
+		part = (int)simple_strtoul(part_str, &ep, 16);
+		/*
+		 * Less than whole string converted,
+		 * or request for whole device, but caller requires partition.
+		 */
+		if (*ep || (part == 0 && !allow_whole_dev)) {
+			printf("** Bad partition specification %s %s **\n",
+			    ifname, dev_part_str);
+			goto cleanup;
+		}
+	}
+
+	/*
+	 * No partition table on device,
+	 * or user requested partition 0 (entire device).
+	 */
+	if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
+	    (part == 0)) {
+		if (!(*dev_desc)->lba) {
+			printf("** Bad device size - %s %s **\n", ifname,
+			       dev_str);
+			goto cleanup;
+		}
+
+		/*
+		 * If user specified a partition ID other than 0,
+		 * or the calling command only accepts partitions,
+		 * it's an error.
+		 */
+		if ((part > 0) || (!allow_whole_dev)) {
+			printf("** No partition table - %s %s **\n", ifname,
+			       dev_str);
+			goto cleanup;
+		}
+
+		info->start = 0;
+		info->size = (*dev_desc)->lba;
+		info->blksz = (*dev_desc)->blksz;
+		info->bootable = 0;
+		strcpy((char *)info->type, BOOT_PART_TYPE);
+		strcpy((char *)info->name, "Whole Disk");
+#ifdef CONFIG_PARTITION_UUIDS
+		info->uuid[0] = 0;
+#endif
+
+		ret = 0;
+		goto cleanup;
+	}
+
+	/*
+	 * Now there's known to be a partition table,
+	 * not specifying a partition means to pick partition 1.
+	 */
+	if (part == PART_UNSPECIFIED)
+		part = 1;
+
+	/*
+	 * If user didn't specify a partition number, or did specify something
+	 * other than "auto", use that partition number directly.
+	 */
+	if (part != PART_AUTO) {
+		ret = get_partition_info(*dev_desc, part, info);
+		if (ret) {
+			printf("** Invalid partition %d **\n", part);
+			goto cleanup;
+		}
+	} else {
+		/*
+		 * Find the first bootable partition.
+		 * If none are bootable, fall back to the first valid partition.
+		 */
+		part = 0;
+		for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
+			ret = get_partition_info(*dev_desc, p, info);
+			if (ret)
+				continue;
+
+			/*
+			 * First valid partition, or new better partition?
+			 * If so, save partition ID.
+			 */
+			if (!part || info->bootable)
+				part = p;
+
+			/* Best possible partition? Stop searching. */
+			if (info->bootable)
+				break;
+
+			/*
+			 * We now need to search further for best possible.
+			 * If we what we just queried was the best so far,
+			 * save the info since we over-write it next loop.
+			 */
+			if (part == p)
+				tmpinfo = *info;
+		}
+		/* If we found any acceptable partition */
+		if (part) {
+			/*
+			 * If we searched all possible partition IDs,
+			 * return the first valid partition we found.
+			 */
+			if (p == MAX_SEARCH_PARTITIONS + 1)
+				*info = tmpinfo;
+		} else {
+			printf("** No valid partitions found **\n");
+			ret = -1;
+			goto cleanup;
+		}
+	}
+	if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
+		printf("** Invalid partition type \"%.32s\""
+			" (expect \"" BOOT_PART_TYPE "\")\n",
+			info->type);
+		ret  = -1;
+		goto cleanup;
+	}
+
+	ret = part;
+	goto cleanup;
+
+cleanup:
+	free(dup_str);
+	return ret;
+}
diff --git a/u-boot/disk/part_dos.c b/u-boot/disk/part_dos.c
index 2de1bb8..3fe901b 100644..100755
--- a/u-boot/disk/part_dos.c
+++ b/u-boot/disk/part_dos.c
@@ -36,7 +36,6 @@
 #include "part_dos.h"
 
 #if defined(CONFIG_CMD_IDE) || \
-    defined(CONFIG_CMD_MG_DISK) || \
     defined(CONFIG_CMD_SATA) || \
     defined(CONFIG_CMD_SCSI) || \
     defined(CONFIG_CMD_USB) || \
@@ -61,14 +60,21 @@ static inline int is_extended(int part_type)
 	    part_type == 0x85);
 }
 
-static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num)
+static inline int is_bootable(dos_partition_t *p)
+{
+	return p->boot_ind == 0x80;
+}
+
+static void print_one_part(dos_partition_t *p, int ext_part_sector,
+			   int part_num, unsigned int disksig)
 {
 	int lba_start = ext_part_sector + le32_to_int (p->start4);
 	int lba_size  = le32_to_int (p->size4);
 
-	printf ("%5d\t\t%10d\t%10d\t%2x%s\n",
-		part_num, lba_start, lba_size, p->sys_ind,
-		(is_extended (p->sys_ind) ? " Extd" : ""));
+	printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n",
+		part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
+		(is_extended(p->sys_ind) ? " Extd" : ""),
+		(is_bootable(p) ? " Boot" : ""));
 }
 
 static int test_block_type(unsigned char *buffer)
@@ -87,22 +93,24 @@ static int test_block_type(unsigned char *buffer)
 
 int test_part_dos (block_dev_desc_t *dev_desc)
 {
-	unsigned char buffer[DEFAULT_SECTOR_SIZE];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 
-	if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
-	    (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
-	    (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
-		return (-1);
-	}
-	return (0);
+	if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1)
+		return -1;
+
+	if (test_block_type(buffer) != DOS_MBR)
+		return -1;
+
+	return 0;
 }
 
 /*  Print a partition that is relative to its Extended partition table
  */
-static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
-							   int part_num)
+static void print_partition_extended(block_dev_desc_t *dev_desc,
+				     int ext_part_sector, int relative,
+				     int part_num, unsigned int disksig)
 {
-	unsigned char buffer[DEFAULT_SECTOR_SIZE];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
 	int i;
 
@@ -112,17 +120,16 @@ static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_s
 		return;
 	}
 	i=test_block_type(buffer);
-	if(i==-1) {
+	if (i != DOS_MBR) {
 		printf ("bad MBR sector signature 0x%02x%02x\n",
 			buffer[DOS_PART_MAGIC_OFFSET],
 			buffer[DOS_PART_MAGIC_OFFSET + 1]);
 		return;
 	}
-	if(i==DOS_PBR) {
-		printf ("    1\t\t         0\t%10ld\t%2x\n",
-			dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]);
-		return;
-	}
+
+	if (!ext_part_sector)
+		disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
+
 	/* Print all primary/logical partitions */
 	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
 	for (i = 0; i < 4; i++, pt++) {
@@ -133,7 +140,7 @@ static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_s
 
 		if ((pt->sys_ind != 0) &&
 		    (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
-			print_one_part (pt, ext_part_sector, part_num);
+			print_one_part(pt, ext_part_sector, part_num, disksig);
 		}
 
 		/* Reverse engr the fdisk part# assignment rule! */
@@ -149,10 +156,9 @@ static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_s
 		if (is_extended (pt->sys_ind)) {
 			int lba_start = le32_to_int (pt->start4) + relative;
 
-			print_partition_extended (dev_desc, lba_start,
-						  ext_part_sector == 0  ? lba_start
-									: relative,
-						  part_num);
+			print_partition_extended(dev_desc, lba_start,
+				ext_part_sector == 0  ? lba_start : relative,
+				part_num, disksig);
 		}
 	}
 
@@ -164,9 +170,10 @@ static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_s
  */
 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
 				 int relative, int part_num,
-				 int which_part, disk_partition_t *info)
+				 int which_part, disk_partition_t *info,
+				 unsigned int disksig)
 {
-	unsigned char buffer[DEFAULT_SECTOR_SIZE];
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 	dos_partition_t *pt;
 	int i;
 
@@ -183,6 +190,11 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
 		return -1;
 	}
 
+#ifdef CONFIG_PARTITION_UUIDS
+	if (!ext_part_sector)
+		disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
+#endif
+
 	/* Print all primary/logical partitions */
 	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
 	for (i = 0; i < 4; i++, pt++) {
@@ -223,6 +235,10 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
 			}
 			/* sprintf(info->type, "%d, pt->sys_ind); */
 			sprintf ((char *)info->type, "U-Boot");
+			info->bootable = is_bootable(pt);
+#ifdef CONFIG_PARTITION_UUIDS
+			sprintf(info->uuid, "%08x-%02x", disksig, part_num);
+#endif
 			return 0;
 		}
 
@@ -241,7 +257,7 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
 
 			return get_partition_info_extended (dev_desc, lba_start,
 				 ext_part_sector == 0 ? lba_start : relative,
-				 part_num, which_part, info);
+				 part_num, which_part, info, disksig);
 		}
 	}
 	return -1;
@@ -249,13 +265,13 @@ static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part
 
 void print_part_dos (block_dev_desc_t *dev_desc)
 {
-	printf ("Partition     Start Sector     Num Sectors     Type\n");
-	print_partition_extended (dev_desc, 0, 0, 1);
+	printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
+	print_partition_extended(dev_desc, 0, 0, 1, 0);
 }
 
 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
 {
-	return get_partition_info_extended (dev_desc, 0, 0, 1, part, info);
+	return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);
 }
 
 
diff --git a/u-boot/disk/part_dos.h b/u-boot/disk/part_dos.h
index 195a32c..7b77c1d 100644..100755
--- a/u-boot/disk/part_dos.h
+++ b/u-boot/disk/part_dos.h
@@ -24,14 +24,7 @@
 #ifndef _DISK_PART_DOS_H
 #define _DISK_PART_DOS_H
 
-
-#ifdef CONFIG_ISO_PARTITION
-/* Make the buffers bigger if ISO partition support is enabled -- CD-ROMS
-   have 2048 byte blocks */
-#define DEFAULT_SECTOR_SIZE	2048
-#else
-#define DEFAULT_SECTOR_SIZE	512
-#endif
+#define DOS_PART_DISKSIG_OFFSET	0x1b8
 #define DOS_PART_TBL_OFFSET	0x1be
 #define DOS_PART_MAGIC_OFFSET	0x1fe
 #define DOS_PBR_FSTYPE_OFFSET	0x36
diff --git a/u-boot/fs/Makefile b/u-boot/fs/Makefile
index 22aad12..bd72111 100644
--- a/u-boot/fs/Makefile
+++ b/u-boot/fs/Makefile
@@ -22,8 +22,21 @@
 #
 #
 
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)libfs.o
+
+COBJS-y 	+= fs.o
+
+COBJS	:= $(COBJS-y)
+SRCS	:= $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+
+all:	$(LIB)
+
 subdirs-$(CONFIG_CMD_CRAMFS) := cramfs
 subdirs-$(CONFIG_CMD_EXT2) += ext2
+subdirs-$(CONFIG_CMD_EXT4) += ext4
 subdirs-$(CONFIG_CMD_FAT) += fat
 subdirs-$(CONFIG_CMD_FDOS) += fdos
 subdirs-$(CONFIG_CMD_JFFS2) += jffs2
@@ -31,8 +44,16 @@ subdirs-$(CONFIG_CMD_REISER) += reiserfs
 subdirs-$(CONFIG_YAFFS2) += yaffs2
 subdirs-$(CONFIG_CMD_UBIFS) += ubifs
 
+$(LIB): $(obj).depend $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
 SUBDIRS	:= $(subdirs-y)
 
-$(obj).depend all:
-	@for dir in $(SUBDIRS) ; do \
-		$(MAKE) -C $$dir $@ ; done
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/u-boot/fs/fat/fat.c b/u-boot/fs/fat/fat.c
index a75e4f2..393c378 100644..100755
--- a/u-boot/fs/fat/fat.c
+++ b/u-boot/fs/fat/fat.c
@@ -27,14 +27,17 @@
 
 #include <common.h>
 #include <config.h>
+#include <exports.h>
 #include <fat.h>
 #include <asm/byteorder.h>
 #include <part.h>
+#include <malloc.h>
+#include <linux/compiler.h>
 
 /*
  * Convert a string to lowercase.
  */
-static void downcase (char *str)
+static void downcase(char *str)
 {
 	while (*str != '\0') {
 		TOLOWER(*str);
@@ -42,99 +45,85 @@ static void downcase (char *str)
 	}
 }
 
-static block_dev_desc_t *cur_dev = NULL;
+static block_dev_desc_t *cur_dev;
+static disk_partition_t cur_part_info;
 
-static unsigned long part_offset = 0;
-
-static int cur_part = 1;
-
-#define DOS_PART_TBL_OFFSET	0x1be
-#define DOS_PART_MAGIC_OFFSET	0x1fe
+#define DOS_BOOT_MAGIC_OFFSET	0x1fe
 #define DOS_FS_TYPE_OFFSET	0x36
 #define DOS_FS32_TYPE_OFFSET	0x52
 
-static int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
+static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
 {
-	if (cur_dev == NULL)
+	if (!cur_dev || !cur_dev->block_read)
 		return -1;
 
-	startblock += part_offset;
-
-	if (cur_dev->block_read) {
-		return cur_dev->block_read(cur_dev->dev, startblock, getsize,
-					   (unsigned long *) bufptr);
-	}
-	return -1;
+	return cur_dev->block_read(cur_dev->dev,
+			cur_part_info.start + block, nr_blocks, buf);
 }
 
-int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
+int fat_set_blk_dev(block_dev_desc_t *dev_desc, disk_partition_t *info)
 {
-	unsigned char buffer[SECTOR_SIZE];
-
-	disk_partition_t info;
-
-	if (!dev_desc->block_read)
-		return -1;
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
 
 	cur_dev = dev_desc;
-	/* check if we have a MBR (on floppies we have only a PBR) */
-	if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)buffer) != 1) {
-		printf("** Can't read from device %d **\n",
-			dev_desc->dev);
-		return -1;
-	}
-	if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
-	    buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
-		/* no signature found */
+	cur_part_info = *info;
+
+	/* Make sure it has a valid FAT header */
+	if (disk_read(0, 1, buffer) != 1) {
+		cur_dev = NULL;
 		return -1;
 	}
-#if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_MG_DISK) || \
-     defined(CONFIG_CMD_SATA) || \
-     defined(CONFIG_CMD_SCSI) || \
-     defined(CONFIG_CMD_USB) || \
-     defined(CONFIG_MMC) || \
-     defined(CONFIG_SYSTEMACE) )
-	/* First we assume there is a MBR */
-	if (!get_partition_info(dev_desc, part_no, &info)) {
-		part_offset = info.start;
-		cur_part = part_no;
-	} else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
-		   (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
-		/* ok, we assume we are on a PBR only */
-		cur_part = 1;
-		part_offset = 0;
-	} else {
-		printf("** Partition %d not valid on device %d **\n",
-			part_no, dev_desc->dev);
+
+	/* Check if it's actually a DOS volume */
+	if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) {
+		cur_dev = NULL;
 		return -1;
 	}
 
-#else
-	if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
-	    (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
-		/* ok, we assume we are on a PBR only */
-		cur_part = 1;
-		part_offset = 0;
-		info.start = part_offset;
-	} else {
-		/* FIXME we need to determine the start block of the
-		 * partition where the DOS FS resides. This can be done
-		 * by using the get_partition_info routine. For this
-		 * purpose the libpart must be included.
-		 */
-		part_offset = 32;
-		cur_part = 1;
-	}
+	/* Check for FAT12/FAT16/FAT32 filesystem */
+	if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3))
+		return 0;
+	if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5))
+		return 0;
+
+	cur_dev = NULL;
+	return -1;
+}
+
+int fat_register_device(block_dev_desc_t *dev_desc, int part_no)
+{
+	disk_partition_t info;
+
+	/* First close any currently found FAT filesystem */
+	cur_dev = NULL;
+
+	/* Read the partition table, if present */
+	if (get_partition_info(dev_desc, part_no, &info)) {
+		if (part_no != 0) {
+			printf("** Partition %d not valid on device %d **\n",
+					part_no, dev_desc->dev);
+			return -1;
+		}
+
+		info.start = 0;
+		info.size = dev_desc->lba;
+		info.blksz = dev_desc->blksz;
+		info.name[0] = 0;
+		info.type[0] = 0;
+		info.bootable = 0;
+#ifdef CONFIG_PARTITION_UUIDS
+		info.uuid[0] = 0;
 #endif
-	return 0;
+	}
+
+	return fat_set_blk_dev(dev_desc, &info);
 }
 
 /*
  * Get the first occurence of a directory delimiter ('/' or '\') in a string.
  * Return index into string if found, -1 otherwise.
  */
-static int dirdelim (char *str)
+static int dirdelim(char *str)
 {
 	char *start = str;
 
@@ -149,7 +138,7 @@ static int dirdelim (char *str)
 /*
  * Extract zero terminated short name from a directory entry.
  */
-static void get_name (dir_entry *dirent, char *s_name)
+static void get_name(dir_entry *dirent, char *s_name)
 {
 	char *ptr;
 
@@ -178,7 +167,7 @@ static void get_name (dir_entry *dirent, char *s_name)
  * Get the entry at index 'entry' in a FAT (12/16/32) table.
  * On failure 0x00 is returned.
  */
-static __u32 get_fatent (fsdata *mydata, __u32 entry)
+static __u32 get_fatent(fsdata *mydata, __u32 entry)
 {
 	__u32 bufnum;
 	__u32 off16, offset;
@@ -209,16 +198,16 @@ static __u32 get_fatent (fsdata *mydata, __u32 entry)
 
 	/* Read a new block of FAT entries into the cache. */
 	if (bufnum != mydata->fatbufnum) {
-		int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
+		__u32 getsize = FATBUFBLOCKS;
 		__u8 *bufptr = mydata->fatbuf;
 		__u32 fatlength = mydata->fatlength;
 		__u32 startblock = bufnum * FATBUFBLOCKS;
 
-		fatlength *= SECTOR_SIZE;	/* We want it in bytes now */
+		if (startblock + getsize > fatlength)
+			getsize = fatlength - startblock;
+
 		startblock += mydata->fat_sect;	/* Offset from start of disk */
 
-		if (getsize > fatlength)
-			getsize = fatlength;
 		if (disk_read(startblock, getsize, bufptr) < 0) {
 			debug("Error reading FAT blocks\n");
 			return ret;
@@ -276,11 +265,11 @@ static __u32 get_fatent (fsdata *mydata, __u32 entry)
  * Return 0 on success, -1 otherwise.
  */
 static int
-get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
-	     unsigned long size)
+get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
 {
-	int idx = 0;
+	__u32 idx = 0;
 	__u32 startsect;
+	int ret;
 
 	if (clustnum > 0) {
 		startsect = mydata->data_begin +
@@ -291,50 +280,122 @@ get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
 
 	debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
 
-	if (disk_read(startsect, size / FS_BLOCK_SIZE, buffer) < 0) {
-		debug("Error reading data\n");
-		return -1;
+	if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) {
+		ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
+
+		printf("FAT: Misaligned buffer address (%p)\n", buffer);
+
+		while (size >= mydata->sect_size) {
+			ret = disk_read(startsect++, 1, tmpbuf);
+			if (ret != 1) {
+				debug("Error reading data (got %d)\n", ret);
+				return -1;
+			}
+
+			memcpy(buffer, tmpbuf, mydata->sect_size);
+			buffer += mydata->sect_size;
+			size -= mydata->sect_size;
+		}
+	} else {
+		idx = size / mydata->sect_size;
+		ret = disk_read(startsect, idx, buffer);
+		if (ret != idx) {
+			debug("Error reading data (got %d)\n", ret);
+			return -1;
+		}
+		startsect += idx;
+		idx *= mydata->sect_size;
+		buffer += idx;
+		size -= idx;
 	}
-	if (size % FS_BLOCK_SIZE) {
-		__u8 tmpbuf[FS_BLOCK_SIZE];
+	if (size) {
+		ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
 
-		idx = size / FS_BLOCK_SIZE;
-		if (disk_read(startsect + idx, 1, tmpbuf) < 0) {
-			debug("Error reading data\n");
+		ret = disk_read(startsect, 1, tmpbuf);
+		if (ret != 1) {
+			debug("Error reading data (got %d)\n", ret);
 			return -1;
 		}
-		buffer += idx * FS_BLOCK_SIZE;
 
-		memcpy(buffer, tmpbuf, size % FS_BLOCK_SIZE);
-		return 0;
+		memcpy(buffer, tmpbuf, size);
 	}
 
 	return 0;
 }
 
 /*
- * Read at most 'maxsize' bytes from the file associated with 'dentptr'
+ * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
  * into 'buffer'.
  * Return the number of bytes read or -1 on fatal errors.
  */
+__u8 get_contents_vfatname_block[MAX_CLUSTSIZE]
+	__aligned(ARCH_DMA_MINALIGN);
+
 static long
-get_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
-	      unsigned long maxsize)
+get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
+	     __u8 *buffer, unsigned long maxsize)
 {
 	unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
-	unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE;
+	unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
 	__u32 curclust = START(dentptr);
 	__u32 endclust, newclust;
 	unsigned long actsize;
 
 	debug("Filesize: %ld bytes\n", filesize);
 
-	if (maxsize > 0 && filesize > maxsize)
-		filesize = maxsize;
+	if (pos >= filesize) {
+		debug("Read position past EOF: %lu\n", pos);
+		return gotsize;
+	}
+
+	if (maxsize > 0 && filesize > pos + maxsize)
+		filesize = pos + maxsize;
 
 	debug("%ld bytes\n", filesize);
 
 	actsize = bytesperclust;
+
+	/* go to cluster at pos */
+	while (actsize <= pos) {
+		curclust = get_fatent(mydata, curclust);
+		if (CHECK_CLUST(curclust, mydata->fatsize)) {
+			debug("curclust: 0x%x\n", curclust);
+			debug("Invalid FAT entry\n");
+			return gotsize;
+		}
+		actsize += bytesperclust;
+	}
+
+	/* actsize > pos */
+	actsize -= bytesperclust;
+	filesize -= actsize;
+	pos -= actsize;
+
+	/* align to beginning of next cluster if any */
+	if (pos) {
+		actsize = min(filesize, bytesperclust);
+		if (get_cluster(mydata, curclust, get_contents_vfatname_block,
+				(int)actsize) != 0) {
+			printf("Error reading cluster\n");
+			return -1;
+		}
+		filesize -= actsize;
+		actsize -= pos;
+		memcpy(buffer, get_contents_vfatname_block + pos, actsize);
+		gotsize += actsize;
+		if (!filesize)
+			return gotsize;
+		buffer += actsize;
+
+		curclust = get_fatent(mydata, curclust);
+		if (CHECK_CLUST(curclust, mydata->fatsize)) {
+			debug("curclust: 0x%x\n", curclust);
+			debug("Invalid FAT entry\n");
+			return gotsize;
+		}
+	}
+
+	actsize = bytesperclust;
 	endclust = curclust;
 
 	do {
@@ -352,21 +413,9 @@ get_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
 			actsize += bytesperclust;
 		}
 
-		/* actsize >= file size */
-		actsize -= bytesperclust;
-
-		/* get remaining clusters */
-		if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
-			printf("Error reading cluster\n");
-			return -1;
-		}
-
 		/* get remaining bytes */
-		gotsize += (int)actsize;
-		filesize -= actsize;
-		buffer += actsize;
 		actsize = filesize;
-		if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
+		if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
 			printf("Error reading cluster\n");
 			return -1;
 		}
@@ -398,7 +447,7 @@ getit:
  * starting at l_name[*idx].
  * Return 1 if terminator (zero byte) is found, 0 otherwise.
  */
-static int slot2str (dir_slot *slotptr, char *l_name, int *idx)
+static int slot2str(dir_slot *slotptr, char *l_name, int *idx)
 {
 	int j;
 
@@ -430,19 +479,15 @@ static int slot2str (dir_slot *slotptr, char *l_name, int *idx)
  * into 'retdent'
  * Return 0 on success, -1 otherwise.
  */
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 get_vfatname_block[MAX_CLUSTSIZE];
-
 static int
-get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
-	      dir_entry *retdent, char *l_name)
+get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
+	     dir_entry *retdent, char *l_name)
 {
 	dir_entry *realdent;
 	dir_slot *slotptr = (dir_slot *)retdent;
-	__u8 *buflimit = cluster + ((curclust == 0) ?
-					LINEAR_PREFETCH_SIZE :
-					(mydata->clust_size * SECTOR_SIZE)
-				   );
+	__u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
+							PREFETCH_BLOCKS :
+							mydata->clust_size);
 	__u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
 	int idx = 0;
 
@@ -472,13 +517,13 @@ get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
 			return -1;
 		}
 
-		if (get_cluster(mydata, curclust, get_vfatname_block,
-				mydata->clust_size * SECTOR_SIZE) != 0) {
+		if (get_cluster(mydata, curclust, get_contents_vfatname_block,
+				mydata->clust_size * mydata->sect_size) != 0) {
 			debug("Error: reading directory block\n");
 			return -1;
 		}
 
-		slotptr2 = (dir_slot *)get_vfatname_block;
+		slotptr2 = (dir_slot *)get_contents_vfatname_block;
 		while (counter > 0) {
 			if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
 			    & 0xff) != counter)
@@ -489,7 +534,7 @@ get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
 
 		/* Save the real directory entry */
 		realdent = (dir_entry *)slotptr2;
-		while ((__u8 *)slotptr2 > get_vfatname_block) {
+		while ((__u8 *)slotptr2 > get_contents_vfatname_block) {
 			slotptr2--;
 			slot2str(slotptr2, l_name, &idx);
 		}
@@ -518,15 +563,16 @@ get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
 }
 
 /* Calculate short name checksum */
-static __u8 mkcksum (const char *str)
+static __u8 mkcksum(const char name[8], const char ext[3])
 {
 	int i;
 
 	__u8 ret = 0;
 
-	for (i = 0; i < 11; i++) {
-		ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + str[i];
-	}
+	for (i = 0; i < sizeof(name); i++)
+		ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i];
+	for (i = 0; i < sizeof(ext); i++)
+		ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i];
 
 	return ret;
 }
@@ -536,12 +582,12 @@ static __u8 mkcksum (const char *str)
  * Get the directory entry associated with 'filename' from the directory
  * starting at 'startsect'
  */
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 get_dentfromdir_block[MAX_CLUSTSIZE];
+__u8 get_dentfromdir_block[MAX_CLUSTSIZE]
+	__aligned(ARCH_DMA_MINALIGN);
 
-static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
-				   char *filename, dir_entry *retdent,
-				   int dols)
+static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
+				  char *filename, dir_entry *retdent,
+				  int dols)
 {
 	__u16 prevcksum = 0xffff;
 	__u32 curclust = START(retdent);
@@ -555,7 +601,7 @@ static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
 		int i;
 
 		if (get_cluster(mydata, curclust, get_dentfromdir_block,
-				mydata->clust_size * SECTOR_SIZE) != 0) {
+				mydata->clust_size * mydata->sect_size) != 0) {
 			debug("Error: reading directory block\n");
 			return NULL;
 		}
@@ -572,8 +618,8 @@ static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
 			}
 			if ((dentptr->attr & ATTR_VOLUME)) {
 #ifdef CONFIG_SUPPORT_VFAT
-				if ((dentptr->attr & ATTR_VFAT) &&
-				    (dentptr-> name[0] & LAST_LONG_ENTRY_MASK)) {
+				if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
+				    (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
 					prevcksum = ((dir_slot *)dentptr)->alias_checksum;
 					get_vfatname(mydata, curclust,
 						     get_dentfromdir_block,
@@ -629,7 +675,9 @@ static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
 				return NULL;
 			}
 #ifdef CONFIG_SUPPORT_VFAT
-			if (dols && mkcksum(dentptr->name) == prevcksum) {
+			__u8 csum = mkcksum(dentptr->name, dentptr->ext);
+			if (dols && csum == prevcksum) {
+				prevcksum = 0xffff;
 				dentptr++;
 				continue;
 			}
@@ -700,17 +748,28 @@ static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
  * Read boot sector and volume info from a FAT filesystem
  */
 static int
-read_bootsectandvi (boot_sector *bs, volume_info *volinfo, int *fatsize)
+read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize)
 {
-	__u8 block[FS_BLOCK_SIZE];
-
+	__u8 *block;
 	volume_info *vistart;
+	int ret = 0;
 
-	if (disk_read (0, 1, block) < 0) {
-		debug("Error: reading block\n");
+	if (cur_dev == NULL) {
+		debug("Error: no device selected\n");
+		return -1;
+	}
+
+	block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
+	if (block == NULL) {
+		debug("Error: allocating block\n");
 		return -1;
 	}
 
+	if (disk_read(0, 1, block) < 0) {
+		debug("Error: reading block\n");
+		goto fail;
+	}
+
 	memcpy(bs, block, sizeof(boot_sector));
 	bs->reserved = FAT2CPU16(bs->reserved);
 	bs->fat_length = FAT2CPU16(bs->fat_length);
@@ -736,43 +795,48 @@ read_bootsectandvi (boot_sector *bs, volume_info *volinfo, int *fatsize)
 
 	if (*fatsize == 32) {
 		if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
-			return 0;
+			goto exit;
 	} else {
 		if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
 			*fatsize = 12;
-			return 0;
+			goto exit;
 		}
 		if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
 			*fatsize = 16;
-			return 0;
+			goto exit;
 		}
 	}
 
 	debug("Error: broken fs_type sign\n");
-	return -1;
+fail:
+	ret = -1;
+exit:
+	free(block);
+	return ret;
 }
 
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 do_fat_read_block[MAX_CLUSTSIZE];
+__u8 do_fat_read_at_block[MAX_CLUSTSIZE]
+	__aligned(ARCH_DMA_MINALIGN);
 
 long
-do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
-	     int dols)
+do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+	       unsigned long maxsize, int dols)
 {
 	char fnamecopy[2048];
 	boot_sector bs;
 	volume_info volinfo;
 	fsdata datablock;
 	fsdata *mydata = &datablock;
-	dir_entry *dentptr;
+	dir_entry *dentptr = NULL;
 	__u16 prevcksum = 0xffff;
 	char *subname = "";
-	int cursect;
+	__u32 cursect;
 	int idx, isdir = 0;
 	int files = 0, dirs = 0;
-	long ret = 0;
+	long ret = -1;
 	int firsttime;
-	int root_cluster;
+	__u32 root_cluster = 0;
+	int rootdir_size = 0;
 	int j;
 
 	if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
@@ -780,36 +844,45 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 		return -1;
 	}
 
-	root_cluster = bs.root_cluster;
-
-	if (mydata->fatsize == 32)
+	if (mydata->fatsize == 32) {
+		root_cluster = bs.root_cluster;
 		mydata->fatlength = bs.fat32_length;
-	else
+	} else {
 		mydata->fatlength = bs.fat_length;
+	}
 
 	mydata->fat_sect = bs.reserved;
 
 	cursect = mydata->rootdir_sect
 		= mydata->fat_sect + mydata->fatlength * bs.fats;
 
+	mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
 	mydata->clust_size = bs.cluster_size;
+	if (mydata->sect_size != cur_part_info.blksz) {
+		printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
+				mydata->sect_size, cur_part_info.blksz);
+		return -1;
+	}
 
 	if (mydata->fatsize == 32) {
 		mydata->data_begin = mydata->rootdir_sect -
 					(mydata->clust_size * 2);
 	} else {
-		int rootdir_size;
-
 		rootdir_size = ((bs.dir_entries[1]  * (int)256 +
 				 bs.dir_entries[0]) *
 				 sizeof(dir_entry)) /
-				 SECTOR_SIZE;
+				 mydata->sect_size;
 		mydata->data_begin = mydata->rootdir_sect +
 					rootdir_size -
 					(mydata->clust_size * 2);
 	}
 
 	mydata->fatbufnum = -1;
+	mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
+	if (mydata->fatbuf == NULL) {
+		debug("Error: allocating memory\n");
+		return -1;
+	}
 
 #ifdef CONFIG_SUPPORT_VFAT
 	debug("VFAT Support enabled\n");
@@ -820,8 +893,9 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 	       "Data begins at: %d\n",
 	       root_cluster,
 	       mydata->rootdir_sect,
-	       mydata->rootdir_sect * SECTOR_SIZE, mydata->data_begin);
-	debug("Cluster size: %d\n", mydata->clust_size);
+	       mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);
+	debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,
+	      mydata->clust_size);
 
 	/* "cwd" is always the root... */
 	while (ISDIRDELIM(*filename))
@@ -833,7 +907,7 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 
 	if (*fnamecopy == '\0') {
 		if (!dols)
-			return -1;
+			goto exit;
 
 		dols = LS_ROOT;
 	} else if ((idx = dirdelim(fnamecopy)) >= 0) {
@@ -852,40 +926,43 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 	while (1) {
 		int i;
 
-		debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%d\n",
-			cursect, mydata->clust_size, DIRENTSPERBLOCK);
+		if (j == 0) {
+			debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
+				cursect, mydata->clust_size, DIRENTSPERBLOCK);
+
+			if (disk_read(cursect,
+					(mydata->fatsize == 32) ?
+					(mydata->clust_size) :
+					PREFETCH_BLOCKS,
+					do_fat_read_at_block) < 0) {
+				debug("Error: reading rootdir block\n");
+				goto exit;
+			}
 
-		if (disk_read(cursect,
-				(mydata->fatsize == 32) ?
-				(mydata->clust_size) :
-				LINEAR_PREFETCH_SIZE / SECTOR_SIZE,
-				do_fat_read_block) < 0) {
-			debug("Error: reading rootdir block\n");
-			return -1;
+			dentptr = (dir_entry *) do_fat_read_at_block;
 		}
 
-		dentptr = (dir_entry *) do_fat_read_block;
-
 		for (i = 0; i < DIRENTSPERBLOCK; i++) {
 			char s_name[14], l_name[VFAT_MAXLEN_BYTES];
+			__u8 csum;
 
 			l_name[0] = '\0';
 			if (dentptr->name[0] == DELETED_FLAG) {
 				dentptr++;
 				continue;
 			}
-			if ((dentptr->attr & ATTR_VOLUME)) {
+
+			csum = mkcksum(dentptr->name, dentptr->ext);
+			if (dentptr->attr & ATTR_VOLUME) {
 #ifdef CONFIG_SUPPORT_VFAT
-				if ((dentptr->attr & ATTR_VFAT) &&
+				if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
 				    (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
 					prevcksum =
 						((dir_slot *)dentptr)->alias_checksum;
 
 					get_vfatname(mydata,
-						     (mydata->fatsize == 32) ?
-						     root_cluster :
-						     0,
-						     do_fat_read_block,
+						     root_cluster,
+						     do_fat_read_at_block,
 						     dentptr, l_name);
 
 					if (dols == LS_ROOT) {
@@ -934,13 +1011,13 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 				if (dols == LS_ROOT) {
 					printf("\n%d file(s), %d dir(s)\n\n",
 						files, dirs);
-					return 0;
+					ret = 0;
 				}
-				return -1;
+				goto exit;
 			}
 #ifdef CONFIG_SUPPORT_VFAT
-			else if (dols == LS_ROOT &&
-				 mkcksum(dentptr->name) == prevcksum) {
+			else if (dols == LS_ROOT && csum == prevcksum) {
+				prevcksum = 0xffff;
 				dentptr++;
 				continue;
 			}
@@ -988,7 +1065,7 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 			}
 
 			if (isdir && !(dentptr->attr & ATTR_DIR))
-				return -1;
+				goto exit;
 
 			debug("RootName: %s", s_name);
 			debug(", start: 0x%x", START(dentptr));
@@ -1006,26 +1083,40 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
 		 * root directory clusters when a cluster has been
 		 * completely processed.
 		 */
-		if ((mydata->fatsize == 32) && (++j == mydata->clust_size)) {
-			int nxtsect;
-			int nxt_clust;
-
-			nxt_clust = get_fatent(mydata, root_cluster);
+		++j;
+		int rootdir_end = 0;
+		if (mydata->fatsize == 32) {
+			if (j == mydata->clust_size) {
+				int nxtsect = 0;
+				int nxt_clust = 0;
 
-			nxtsect = mydata->data_begin +
-				(nxt_clust * mydata->clust_size);
+				nxt_clust = get_fatent(mydata, root_cluster);
+				rootdir_end = CHECK_CLUST(nxt_clust, 32);
 
-			debug("END LOOP: sect=%d, root_clust=%d, "
-			      "n_sect=%d, n_clust=%d\n",
-			      cursect, root_cluster,
-			      nxtsect, nxt_clust);
+				nxtsect = mydata->data_begin +
+					(nxt_clust * mydata->clust_size);
 
-			root_cluster = nxt_clust;
+				root_cluster = nxt_clust;
 
-			cursect = nxtsect;
-			j = 0;
+				cursect = nxtsect;
+				j = 0;
+			}
 		} else {
-			cursect++;
+			if (j == PREFETCH_BLOCKS)
+				j = 0;
+
+			rootdir_end = (++cursect - mydata->rootdir_sect >=
+				       rootdir_size);
+		}
+
+		/* If end of rootdir reached */
+		if (rootdir_end) {
+			if (dols == LS_ROOT) {
+				printf("\n%d file(s), %d dir(s)\n\n",
+				       files, dirs);
+				ret = 0;
+			}
+			goto exit;
 		}
 	}
 rootdir_done:
@@ -1062,24 +1153,32 @@ rootdir_done:
 		if (get_dentfromdir(mydata, startsect, subname, dentptr,
 				     isdir ? 0 : dols) == NULL) {
 			if (dols && !isdir)
-				return 0;
-			return -1;
+				ret = 0;
+			goto exit;
 		}
 
-		if (idx >= 0) {
-			if (!(dentptr->attr & ATTR_DIR))
-				return -1;
+		if (isdir && !(dentptr->attr & ATTR_DIR))
+			goto exit;
+
+		if (idx >= 0)
 			subname = nextname;
-		}
 	}
 
-	ret = get_contents(mydata, dentptr, buffer, maxsize);
+	ret = get_contents(mydata, dentptr, pos, buffer, maxsize);
 	debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
 
+exit:
+	free(mydata->fatbuf);
 	return ret;
 }
 
-int file_fat_detectfs (void)
+long
+do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
+{
+	return do_fat_read_at(filename, 0, buffer, maxsize, dols);
+}
+
+int file_fat_detectfs(void)
 {
 	boot_sector bs;
 	volume_info volinfo;
@@ -1092,7 +1191,6 @@ int file_fat_detectfs (void)
 	}
 
 #if defined(CONFIG_CMD_IDE) || \
-    defined(CONFIG_CMD_MG_DISK) || \
     defined(CONFIG_CMD_SATA) || \
     defined(CONFIG_CMD_SCSI) || \
     defined(CONFIG_CMD_USB) || \
@@ -1137,19 +1235,24 @@ int file_fat_detectfs (void)
 	vol_label[11] = '\0';
 	volinfo.fs_type[5] = '\0';
 
-	printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part,
-		volinfo.fs_type, vol_label);
+	printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label);
 
 	return 0;
 }
 
-int file_fat_ls (const char *dir)
+int file_fat_ls(const char *dir)
 {
 	return do_fat_read(dir, NULL, 0, LS_YES);
 }
 
-long file_fat_read (const char *filename, void *buffer, unsigned long maxsize)
+long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+		      unsigned long maxsize)
 {
 	printf("reading %s\n", filename);
-	return do_fat_read(filename, buffer, maxsize, LS_NO);
+	return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO);
+}
+
+long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
+{
+	return file_fat_read_at(filename, 0, buffer, maxsize);
 }
diff --git a/u-boot/fs/fat/fat_write.c b/u-boot/fs/fat/fat_write.c
new file mode 100755
index 0000000..4a1bda0
--- /dev/null
+++ b/u-boot/fs/fat/fat_write.c
@@ -0,0 +1,1098 @@
+/*
+ * fat_write.c
+ *
+ * R/W (V)FAT 12/16/32 filesystem implementation by Donggeun Kim
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <config.h>
+#include <fat.h>
+#include <asm/byteorder.h>
+#include <part.h>
+#include "fat.c"
+
+static void uppercase(char *str, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++) {
+		TOUPPER(*str);
+		str++;
+	}
+}
+
+static int total_sector;
+static int disk_write(__u32 block, __u32 nr_blocks, void *buf)
+{
+	if (!cur_dev || !cur_dev->block_write)
+		return -1;
+
+	if (cur_part_info.start + block + nr_blocks >
+		cur_part_info.start + total_sector) {
+		printf("error: overflow occurs\n");
+		return -1;
+	}
+
+	return cur_dev->block_write(cur_dev->dev,
+			cur_part_info.start + block, nr_blocks,	buf);
+}
+
+/*
+ * Set short name in directory entry
+ */
+static void set_name(dir_entry *dirent, const char *filename)
+{
+	char s_name[VFAT_MAXLEN_BYTES];
+	char *period;
+	int period_location, len, i, ext_num;
+
+	if (filename == NULL)
+		return;
+
+	len = strlen(filename);
+	if (len == 0)
+		return;
+
+	memcpy(s_name, filename, len);
+	uppercase(s_name, len);
+
+	period = strchr(s_name, '.');
+	if (period == NULL) {
+		period_location = len;
+		ext_num = 0;
+	} else {
+		period_location = period - s_name;
+		ext_num = len - period_location - 1;
+	}
+
+	/* Pad spaces when the length of file name is shorter than eight */
+	if (period_location < 8) {
+		memcpy(dirent->name, s_name, period_location);
+		for (i = period_location; i < 8; i++)
+			dirent->name[i] = ' ';
+	} else if (period_location == 8) {
+		memcpy(dirent->name, s_name, period_location);
+	} else {
+		memcpy(dirent->name, s_name, 6);
+		dirent->name[6] = '~';
+		dirent->name[7] = '1';
+	}
+
+	if (ext_num < 3) {
+		memcpy(dirent->ext, s_name + period_location + 1, ext_num);
+		for (i = ext_num; i < 3; i++)
+			dirent->ext[i] = ' ';
+	} else
+		memcpy(dirent->ext, s_name + period_location + 1, 3);
+
+	debug("name : %s\n", dirent->name);
+	debug("ext : %s\n", dirent->ext);
+}
+
+static __u8 num_of_fats;
+/*
+ * Write fat buffer into block device
+ */
+static int flush_fat_buffer(fsdata *mydata)
+{
+	int getsize = FATBUFBLOCKS;
+	__u32 fatlength = mydata->fatlength;
+	__u8 *bufptr = mydata->fatbuf;
+	__u32 startblock = mydata->fatbufnum * FATBUFBLOCKS;
+
+	fatlength *= mydata->sect_size;
+	startblock += mydata->fat_sect;
+
+	if (getsize > fatlength)
+		getsize = fatlength;
+
+	/* Write FAT buf */
+	if (disk_write(startblock, getsize, bufptr) < 0) {
+		debug("error: writing FAT blocks\n");
+		return -1;
+	}
+
+	if (num_of_fats == 2) {
+		/* Update corresponding second FAT blocks */
+		startblock += mydata->fatlength;
+		if (disk_write(startblock, getsize, bufptr) < 0) {
+			debug("error: writing second FAT blocks\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Get the entry at index 'entry' in a FAT (12/16/32) table.
+ * On failure 0x00 is returned.
+ * When bufnum is changed, write back the previous fatbuf to the disk.
+ */
+static __u32 get_fatent_value(fsdata *mydata, __u32 entry)
+{
+	__u32 bufnum;
+	__u32 off16, offset;
+	__u32 ret = 0x00;
+	__u16 val1, val2;
+
+	switch (mydata->fatsize) {
+	case 32:
+		bufnum = entry / FAT32BUFSIZE;
+		offset = entry - bufnum * FAT32BUFSIZE;
+		break;
+	case 16:
+		bufnum = entry / FAT16BUFSIZE;
+		offset = entry - bufnum * FAT16BUFSIZE;
+		break;
+	case 12:
+		bufnum = entry / FAT12BUFSIZE;
+		offset = entry - bufnum * FAT12BUFSIZE;
+		break;
+
+	default:
+		/* Unsupported FAT size */
+		return ret;
+	}
+
+	debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
+	       mydata->fatsize, entry, entry, offset, offset);
+
+	/* Read a new block of FAT entries into the cache. */
+	if (bufnum != mydata->fatbufnum) {
+		int getsize = FATBUFBLOCKS;
+		__u8 *bufptr = mydata->fatbuf;
+		__u32 fatlength = mydata->fatlength;
+		__u32 startblock = bufnum * FATBUFBLOCKS;
+
+		if (getsize > fatlength)
+			getsize = fatlength;
+
+		fatlength *= mydata->sect_size;	/* We want it in bytes now */
+		startblock += mydata->fat_sect;	/* Offset from start of disk */
+
+		/* Write back the fatbuf to the disk */
+		if (mydata->fatbufnum != -1) {
+			if (flush_fat_buffer(mydata) < 0)
+				return -1;
+		}
+
+		if (disk_read(startblock, getsize, bufptr) < 0) {
+			debug("Error reading FAT blocks\n");
+			return ret;
+		}
+		mydata->fatbufnum = bufnum;
+	}
+
+	/* Get the actual entry from the table */
+	switch (mydata->fatsize) {
+	case 32:
+		ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);
+		break;
+	case 16:
+		ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);
+		break;
+	case 12:
+		off16 = (offset * 3) / 4;
+
+		switch (offset & 0x3) {
+		case 0:
+			ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
+			ret &= 0xfff;
+			break;
+		case 1:
+			val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
+			val1 &= 0xf000;
+			val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
+			val2 &= 0x00ff;
+			ret = (val2 << 4) | (val1 >> 12);
+			break;
+		case 2:
+			val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
+			val1 &= 0xff00;
+			val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
+			val2 &= 0x000f;
+			ret = (val2 << 8) | (val1 >> 8);
+			break;
+		case 3:
+			ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
+			ret = (ret & 0xfff0) >> 4;
+			break;
+		default:
+			break;
+		}
+		break;
+	}
+	debug("FAT%d: ret: %08x, entry: %08x, offset: %04x\n",
+	       mydata->fatsize, ret, entry, offset);
+
+	return ret;
+}
+
+#ifdef CONFIG_SUPPORT_VFAT
+/*
+ * Set the file name information from 'name' into 'slotptr',
+ */
+static int str2slot(dir_slot *slotptr, const char *name, int *idx)
+{
+	int j, end_idx = 0;
+
+	for (j = 0; j <= 8; j += 2) {
+		if (name[*idx] == 0x00) {
+			slotptr->name0_4[j] = 0;
+			slotptr->name0_4[j + 1] = 0;
+			end_idx++;
+			goto name0_4;
+		}
+		slotptr->name0_4[j] = name[*idx];
+		(*idx)++;
+		end_idx++;
+	}
+	for (j = 0; j <= 10; j += 2) {
+		if (name[*idx] == 0x00) {
+			slotptr->name5_10[j] = 0;
+			slotptr->name5_10[j + 1] = 0;
+			end_idx++;
+			goto name5_10;
+		}
+		slotptr->name5_10[j] = name[*idx];
+		(*idx)++;
+		end_idx++;
+	}
+	for (j = 0; j <= 2; j += 2) {
+		if (name[*idx] == 0x00) {
+			slotptr->name11_12[j] = 0;
+			slotptr->name11_12[j + 1] = 0;
+			end_idx++;
+			goto name11_12;
+		}
+		slotptr->name11_12[j] = name[*idx];
+		(*idx)++;
+		end_idx++;
+	}
+
+	if (name[*idx] == 0x00)
+		return 1;
+
+	return 0;
+/* Not used characters are filled with 0xff 0xff */
+name0_4:
+	for (; end_idx < 5; end_idx++) {
+		slotptr->name0_4[end_idx * 2] = 0xff;
+		slotptr->name0_4[end_idx * 2 + 1] = 0xff;
+	}
+	end_idx = 5;
+name5_10:
+	end_idx -= 5;
+	for (; end_idx < 6; end_idx++) {
+		slotptr->name5_10[end_idx * 2] = 0xff;
+		slotptr->name5_10[end_idx * 2 + 1] = 0xff;
+	}
+	end_idx = 11;
+name11_12:
+	end_idx -= 11;
+	for (; end_idx < 2; end_idx++) {
+		slotptr->name11_12[end_idx * 2] = 0xff;
+		slotptr->name11_12[end_idx * 2 + 1] = 0xff;
+	}
+
+	return 1;
+}
+
+static int is_next_clust(fsdata *mydata, dir_entry *dentptr);
+static void flush_dir_table(fsdata *mydata, dir_entry **dentptr);
+
+/*
+ * Fill dir_slot entries with appropriate name, id, and attr
+ * The real directory entry is returned by 'dentptr'
+ */
+static void
+fill_dir_slot(fsdata *mydata, dir_entry **dentptr, const char *l_name)
+{
+	dir_slot *slotptr = (dir_slot *)get_contents_vfatname_block;
+	__u8 counter = 0, checksum;
+	int idx = 0, ret;
+	char s_name[16];
+
+	/* Get short file name and checksum value */
+	strncpy(s_name, (*dentptr)->name, 16);
+	checksum = mkcksum((*dentptr)->name, (*dentptr)->ext);
+
+	do {
+		memset(slotptr, 0x00, sizeof(dir_slot));
+		ret = str2slot(slotptr, l_name, &idx);
+		slotptr->id = ++counter;
+		slotptr->attr = ATTR_VFAT;
+		slotptr->alias_checksum = checksum;
+		slotptr++;
+	} while (ret == 0);
+
+	slotptr--;
+	slotptr->id |= LAST_LONG_ENTRY_MASK;
+
+	while (counter >= 1) {
+		if (is_next_clust(mydata, *dentptr)) {
+			/* A new cluster is allocated for directory table */
+			flush_dir_table(mydata, dentptr);
+		}
+		memcpy(*dentptr, slotptr, sizeof(dir_slot));
+		(*dentptr)++;
+		slotptr--;
+		counter--;
+	}
+
+	if (is_next_clust(mydata, *dentptr)) {
+		/* A new cluster is allocated for directory table */
+		flush_dir_table(mydata, dentptr);
+	}
+}
+
+static __u32 dir_curclust;
+
+/*
+ * Extract the full long filename starting at 'retdent' (which is really
+ * a slot) into 'l_name'. If successful also copy the real directory entry
+ * into 'retdent'
+ * If additional adjacent cluster for directory entries is read into memory,
+ * then 'get_contents_vfatname_block' is copied into 'get_dentfromdir_block' and
+ * the location of the real directory entry is returned by 'retdent'
+ * Return 0 on success, -1 otherwise.
+ */
+static int
+get_long_file_name(fsdata *mydata, int curclust, __u8 *cluster,
+	      dir_entry **retdent, char *l_name)
+{
+	dir_entry *realdent;
+	dir_slot *slotptr = (dir_slot *)(*retdent);
+	dir_slot *slotptr2 = NULL;
+	__u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
+							PREFETCH_BLOCKS :
+							mydata->clust_size);
+	__u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
+	int idx = 0, cur_position = 0;
+
+	if (counter > VFAT_MAXSEQ) {
+		debug("Error: VFAT name is too long\n");
+		return -1;
+	}
+
+	while ((__u8 *)slotptr < buflimit) {
+		if (counter == 0)
+			break;
+		if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
+			return -1;
+		slotptr++;
+		counter--;
+	}
+
+	if ((__u8 *)slotptr >= buflimit) {
+		if (curclust == 0)
+			return -1;
+		curclust = get_fatent_value(mydata, dir_curclust);
+		if (CHECK_CLUST(curclust, mydata->fatsize)) {
+			debug("curclust: 0x%x\n", curclust);
+			printf("Invalid FAT entry\n");
+			return -1;
+		}
+
+		dir_curclust = curclust;
+
+		if (get_cluster(mydata, curclust, get_contents_vfatname_block,
+				mydata->clust_size * mydata->sect_size) != 0) {
+			debug("Error: reading directory block\n");
+			return -1;
+		}
+
+		slotptr2 = (dir_slot *)get_contents_vfatname_block;
+		while (counter > 0) {
+			if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
+			    & 0xff) != counter)
+				return -1;
+			slotptr2++;
+			counter--;
+		}
+
+		/* Save the real directory entry */
+		realdent = (dir_entry *)slotptr2;
+		while ((__u8 *)slotptr2 > get_contents_vfatname_block) {
+			slotptr2--;
+			slot2str(slotptr2, l_name, &idx);
+		}
+	} else {
+		/* Save the real directory entry */
+		realdent = (dir_entry *)slotptr;
+	}
+
+	do {
+		slotptr--;
+		if (slot2str(slotptr, l_name, &idx))
+			break;
+	} while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
+
+	l_name[idx] = '\0';
+	if (*l_name == DELETED_FLAG)
+		*l_name = '\0';
+	else if (*l_name == aRING)
+		*l_name = DELETED_FLAG;
+	downcase(l_name);
+
+	/* Return the real directory entry */
+	*retdent = realdent;
+
+	if (slotptr2) {
+		memcpy(get_dentfromdir_block, get_contents_vfatname_block,
+			mydata->clust_size * mydata->sect_size);
+		cur_position = (__u8 *)realdent - get_contents_vfatname_block;
+		*retdent = (dir_entry *) &get_dentfromdir_block[cur_position];
+	}
+
+	return 0;
+}
+
+#endif
+
+/*
+ * Set the entry at index 'entry' in a FAT (16/32) table.
+ */
+static int set_fatent_value(fsdata *mydata, __u32 entry, __u32 entry_value)
+{
+	__u32 bufnum, offset;
+
+	switch (mydata->fatsize) {
+	case 32:
+		bufnum = entry / FAT32BUFSIZE;
+		offset = entry - bufnum * FAT32BUFSIZE;
+		break;
+	case 16:
+		bufnum = entry / FAT16BUFSIZE;
+		offset = entry - bufnum * FAT16BUFSIZE;
+		break;
+	default:
+		/* Unsupported FAT size */
+		return -1;
+	}
+
+	/* Read a new block of FAT entries into the cache. */
+	if (bufnum != mydata->fatbufnum) {
+		int getsize = FATBUFBLOCKS;
+		__u8 *bufptr = mydata->fatbuf;
+		__u32 fatlength = mydata->fatlength;
+		__u32 startblock = bufnum * FATBUFBLOCKS;
+
+		fatlength *= mydata->sect_size;
+		startblock += mydata->fat_sect;
+
+		if (getsize > fatlength)
+			getsize = fatlength;
+
+		if (mydata->fatbufnum != -1) {
+			if (flush_fat_buffer(mydata) < 0)
+				return -1;
+		}
+
+		if (disk_read(startblock, getsize, bufptr) < 0) {
+			debug("Error reading FAT blocks\n");
+			return -1;
+		}
+		mydata->fatbufnum = bufnum;
+	}
+
+	/* Set the actual entry */
+	switch (mydata->fatsize) {
+	case 32:
+		((__u32 *) mydata->fatbuf)[offset] = cpu_to_le32(entry_value);
+		break;
+	case 16:
+		((__u16 *) mydata->fatbuf)[offset] = cpu_to_le16(entry_value);
+		break;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * Determine the entry value at index 'entry' in a FAT (16/32) table
+ */
+static __u32 determine_fatent(fsdata *mydata, __u32 entry)
+{
+	__u32 next_fat, next_entry = entry + 1;
+
+	while (1) {
+		next_fat = get_fatent_value(mydata, next_entry);
+		if (next_fat == 0) {
+			set_fatent_value(mydata, entry, next_entry);
+			break;
+		}
+		next_entry++;
+	}
+	debug("FAT%d: entry: %08x, entry_value: %04x\n",
+	       mydata->fatsize, entry, next_entry);
+
+	return next_entry;
+}
+
+/*
+ * Write at most 'size' bytes from 'buffer' into the specified cluster.
+ * Return 0 on success, -1 otherwise.
+ */
+static int
+set_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer,
+	     unsigned long size)
+{
+	int idx = 0;
+	__u32 startsect;
+
+	if (clustnum > 0)
+		startsect = mydata->data_begin +
+				clustnum * mydata->clust_size;
+	else
+		startsect = mydata->rootdir_sect;
+
+	debug("clustnum: %d, startsect: %d\n", clustnum, startsect);
+
+	if (disk_write(startsect, size / mydata->sect_size, buffer) < 0) {
+		debug("Error writing data\n");
+		return -1;
+	}
+
+	if (size % mydata->sect_size) {
+		__u8 tmpbuf[mydata->sect_size];
+
+		idx = size / mydata->sect_size;
+		buffer += idx * mydata->sect_size;
+		memcpy(tmpbuf, buffer, size % mydata->sect_size);
+
+		if (disk_write(startsect + idx, 1, tmpbuf) < 0) {
+			debug("Error writing data\n");
+			return -1;
+		}
+
+		return 0;
+	}
+
+	return 0;
+}
+
+/*
+ * Find the first empty cluster
+ */
+static int find_empty_cluster(fsdata *mydata)
+{
+	__u32 fat_val, entry = 3;
+
+	while (1) {
+		fat_val = get_fatent_value(mydata, entry);
+		if (fat_val == 0)
+			break;
+		entry++;
+	}
+
+	return entry;
+}
+
+/*
+ * Write directory entries in 'get_dentfromdir_block' to block device
+ */
+static void flush_dir_table(fsdata *mydata, dir_entry **dentptr)
+{
+	int dir_newclust = 0;
+
+	if (set_cluster(mydata, dir_curclust,
+		    get_dentfromdir_block,
+		    mydata->clust_size * mydata->sect_size) != 0) {
+		printf("error: wrinting directory entry\n");
+		return;
+	}
+	dir_newclust = find_empty_cluster(mydata);
+	set_fatent_value(mydata, dir_curclust, dir_newclust);
+	if (mydata->fatsize == 32)
+		set_fatent_value(mydata, dir_newclust, 0xffffff8);
+	else if (mydata->fatsize == 16)
+		set_fatent_value(mydata, dir_newclust, 0xfff8);
+
+	dir_curclust = dir_newclust;
+
+	if (flush_fat_buffer(mydata) < 0)
+		return;
+
+	memset(get_dentfromdir_block, 0x00,
+		mydata->clust_size * mydata->sect_size);
+
+	*dentptr = (dir_entry *) get_dentfromdir_block;
+}
+
+/*
+ * Set empty cluster from 'entry' to the end of a file
+ */
+static int clear_fatent(fsdata *mydata, __u32 entry)
+{
+	__u32 fat_val;
+
+	while (1) {
+		fat_val = get_fatent_value(mydata, entry);
+		if (fat_val != 0)
+			set_fatent_value(mydata, entry, 0);
+		else
+			break;
+
+		if (fat_val == 0xfffffff || fat_val == 0xffff)
+			break;
+
+		entry = fat_val;
+	}
+
+	/* Flush fat buffer */
+	if (flush_fat_buffer(mydata) < 0)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Write at most 'maxsize' bytes from 'buffer' into
+ * the file associated with 'dentptr'
+ * Return the number of bytes read or -1 on fatal errors.
+ */
+static int
+set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
+	      unsigned long maxsize)
+{
+	unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
+	unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
+	__u32 curclust = START(dentptr);
+	__u32 endclust = 0, newclust = 0;
+	unsigned long actsize;
+
+	debug("Filesize: %ld bytes\n", filesize);
+
+	if (maxsize > 0 && filesize > maxsize)
+		filesize = maxsize;
+
+	debug("%ld bytes\n", filesize);
+
+	actsize = bytesperclust;
+	endclust = curclust;
+	do {
+		/* search for consecutive clusters */
+		while (actsize < filesize) {
+			newclust = determine_fatent(mydata, endclust);
+
+			if ((newclust - 1) != endclust)
+				goto getit;
+
+			if (CHECK_CLUST(newclust, mydata->fatsize)) {
+				debug("curclust: 0x%x\n", newclust);
+				debug("Invalid FAT entry\n");
+				return gotsize;
+			}
+			endclust = newclust;
+			actsize += bytesperclust;
+		}
+		/* actsize >= file size */
+		actsize -= bytesperclust;
+		/* set remaining clusters */
+		if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
+			debug("error: writing cluster\n");
+			return -1;
+		}
+
+		/* set remaining bytes */
+		gotsize += (int)actsize;
+		filesize -= actsize;
+		buffer += actsize;
+		actsize = filesize;
+
+		if (set_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
+			debug("error: writing cluster\n");
+			return -1;
+		}
+		gotsize += actsize;
+
+		/* Mark end of file in FAT */
+		if (mydata->fatsize == 16)
+			newclust = 0xffff;
+		else if (mydata->fatsize == 32)
+			newclust = 0xfffffff;
+		set_fatent_value(mydata, endclust, newclust);
+
+		return gotsize;
+getit:
+		if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
+			debug("error: writing cluster\n");
+			return -1;
+		}
+		gotsize += (int)actsize;
+		filesize -= actsize;
+		buffer += actsize;
+
+		if (CHECK_CLUST(curclust, mydata->fatsize)) {
+			debug("curclust: 0x%x\n", curclust);
+			debug("Invalid FAT entry\n");
+			return gotsize;
+		}
+		actsize = bytesperclust;
+		curclust = endclust = newclust;
+	} while (1);
+}
+
+/*
+ * Fill dir_entry
+ */
+static void fill_dentry(fsdata *mydata, dir_entry *dentptr,
+	const char *filename, __u32 start_cluster, __u32 size, __u8 attr)
+{
+	if (mydata->fatsize == 32)
+		dentptr->starthi =
+			cpu_to_le16((start_cluster & 0xffff0000) >> 16);
+	dentptr->start = cpu_to_le16(start_cluster & 0xffff);
+	dentptr->size = cpu_to_le32(size);
+
+	dentptr->attr = attr;
+
+	set_name(dentptr, filename);
+}
+
+/*
+ * Check whether adding a file makes the file system to
+ * exceed the size of the block device
+ * Return -1 when overflow occurs, otherwise return 0
+ */
+static int check_overflow(fsdata *mydata, __u32 clustnum, unsigned long size)
+{
+	__u32 startsect, sect_num;
+
+	if (clustnum > 0) {
+		startsect = mydata->data_begin +
+				clustnum * mydata->clust_size;
+	} else {
+		startsect = mydata->rootdir_sect;
+	}
+
+	sect_num = size / mydata->sect_size;
+	if (size % mydata->sect_size)
+		sect_num++;
+
+	if (startsect + sect_num > cur_part_info.start + total_sector)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Check if adding several entries exceed one cluster boundary
+ */
+static int is_next_clust(fsdata *mydata, dir_entry *dentptr)
+{
+	int cur_position;
+
+	cur_position = (__u8 *)dentptr - get_dentfromdir_block;
+
+	if (cur_position >= mydata->clust_size * mydata->sect_size)
+		return 1;
+	else
+		return 0;
+}
+
+static dir_entry *empty_dentptr;
+/*
+ * Find a directory entry based on filename or start cluster number
+ * If the directory entry is not found,
+ * the new position for writing a directory entry will be returned
+ */
+static dir_entry *find_directory_entry(fsdata *mydata, int startsect,
+	char *filename, dir_entry *retdent, __u32 start)
+{
+	__u32 curclust = (startsect - mydata->data_begin) / mydata->clust_size;
+
+	debug("get_dentfromdir: %s\n", filename);
+
+	while (1) {
+		dir_entry *dentptr;
+
+		int i;
+
+		if (get_cluster(mydata, curclust, get_dentfromdir_block,
+			    mydata->clust_size * mydata->sect_size) != 0) {
+			printf("Error: reading directory block\n");
+			return NULL;
+		}
+
+		dentptr = (dir_entry *)get_dentfromdir_block;
+
+		dir_curclust = curclust;
+
+		for (i = 0; i < DIRENTSPERCLUST; i++) {
+			char s_name[14], l_name[VFAT_MAXLEN_BYTES];
+
+			l_name[0] = '\0';
+			if (dentptr->name[0] == DELETED_FLAG) {
+				dentptr++;
+				if (is_next_clust(mydata, dentptr))
+					break;
+				continue;
+			}
+			if ((dentptr->attr & ATTR_VOLUME)) {
+#ifdef CONFIG_SUPPORT_VFAT
+				if ((dentptr->attr & ATTR_VFAT) &&
+				    (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
+					get_long_file_name(mydata, curclust,
+						     get_dentfromdir_block,
+						     &dentptr, l_name);
+					debug("vfatname: |%s|\n", l_name);
+				} else
+#endif
+				{
+					/* Volume label or VFAT entry */
+					dentptr++;
+					if (is_next_clust(mydata, dentptr))
+						break;
+					continue;
+				}
+			}
+			if (dentptr->name[0] == 0) {
+				debug("Dentname == NULL - %d\n", i);
+				empty_dentptr = dentptr;
+				return NULL;
+			}
+
+			get_name(dentptr, s_name);
+
+			if (strcmp(filename, s_name)
+			    && strcmp(filename, l_name)) {
+				debug("Mismatch: |%s|%s|\n",
+					s_name, l_name);
+				dentptr++;
+				if (is_next_clust(mydata, dentptr))
+					break;
+				continue;
+			}
+
+			memcpy(retdent, dentptr, sizeof(dir_entry));
+
+			debug("DentName: %s", s_name);
+			debug(", start: 0x%x", START(dentptr));
+			debug(", size:  0x%x %s\n",
+			      FAT2CPU32(dentptr->size),
+			      (dentptr->attr & ATTR_DIR) ?
+			      "(DIR)" : "");
+
+			return dentptr;
+		}
+
+		curclust = get_fatent_value(mydata, dir_curclust);
+		if ((curclust >= 0xffffff8) || (curclust >= 0xfff8)) {
+			empty_dentptr = dentptr;
+			return NULL;
+		}
+		if (CHECK_CLUST(curclust, mydata->fatsize)) {
+			debug("curclust: 0x%x\n", curclust);
+			debug("Invalid FAT entry\n");
+			return NULL;
+		}
+	}
+
+	return NULL;
+}
+
+static int do_fat_write(const char *filename, void *buffer,
+	unsigned long size)
+{
+	dir_entry *dentptr, *retdent;
+	__u32 startsect;
+	__u32 start_cluster;
+	boot_sector bs;
+	volume_info volinfo;
+	fsdata datablock;
+	fsdata *mydata = &datablock;
+	int cursect;
+	int ret = -1, name_len;
+	char l_filename[VFAT_MAXLEN_BYTES];
+	int write_size = size;
+
+	dir_curclust = 0;
+
+	if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
+		debug("error: reading boot sector\n");
+		return -1;
+	}
+
+	total_sector = bs.total_sect;
+	if (total_sector == 0)
+		total_sector = cur_part_info.size;
+
+	if (mydata->fatsize == 32)
+		mydata->fatlength = bs.fat32_length;
+	else
+		mydata->fatlength = bs.fat_length;
+
+	mydata->fat_sect = bs.reserved;
+
+	cursect = mydata->rootdir_sect
+		= mydata->fat_sect + mydata->fatlength * bs.fats;
+	num_of_fats = bs.fats;
+
+	mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
+	mydata->clust_size = bs.cluster_size;
+
+	if (mydata->fatsize == 32) {
+		mydata->data_begin = mydata->rootdir_sect -
+					(mydata->clust_size * 2);
+	} else {
+		int rootdir_size;
+
+		rootdir_size = ((bs.dir_entries[1]  * (int)256 +
+				 bs.dir_entries[0]) *
+				 sizeof(dir_entry)) /
+				 mydata->sect_size;
+		mydata->data_begin = mydata->rootdir_sect +
+					rootdir_size -
+					(mydata->clust_size * 2);
+	}
+
+	mydata->fatbufnum = -1;
+	mydata->fatbuf = malloc(FATBUFSIZE);
+	if (mydata->fatbuf == NULL) {
+		debug("Error: allocating memory\n");
+		return -1;
+	}
+
+	if (disk_read(cursect,
+		(mydata->fatsize == 32) ?
+		(mydata->clust_size) :
+		PREFETCH_BLOCKS, do_fat_read_at_block) < 0) {
+		debug("Error: reading rootdir block\n");
+		goto exit;
+	}
+	dentptr = (dir_entry *) do_fat_read_at_block;
+
+	name_len = strlen(filename);
+	if (name_len >= VFAT_MAXLEN_BYTES)
+		name_len = VFAT_MAXLEN_BYTES - 1;
+
+	memcpy(l_filename, filename, name_len);
+	l_filename[name_len] = 0; /* terminate the string */
+	downcase(l_filename);
+
+	startsect = mydata->rootdir_sect;
+	retdent = find_directory_entry(mydata, startsect,
+				l_filename, dentptr, 0);
+	if (retdent) {
+		/* Update file size and start_cluster in a directory entry */
+		retdent->size = cpu_to_le32(size);
+		start_cluster = FAT2CPU16(retdent->start);
+		if (mydata->fatsize == 32)
+			start_cluster |=
+				(FAT2CPU16(retdent->starthi) << 16);
+
+		ret = check_overflow(mydata, start_cluster, size);
+		if (ret) {
+			printf("Error: %ld overflow\n", size);
+			goto exit;
+		}
+
+		ret = clear_fatent(mydata, start_cluster);
+		if (ret) {
+			printf("Error: clearing FAT entries\n");
+			goto exit;
+		}
+
+		ret = set_contents(mydata, retdent, buffer, size);
+		if (ret < 0) {
+			printf("Error: writing contents\n");
+			goto exit;
+		}
+		write_size = ret;
+		debug("attempt to write 0x%x bytes\n", write_size);
+
+		/* Flush fat buffer */
+		ret = flush_fat_buffer(mydata);
+		if (ret) {
+			printf("Error: flush fat buffer\n");
+			goto exit;
+		}
+
+		/* Write directory table to device */
+		ret = set_cluster(mydata, dir_curclust,
+			    get_dentfromdir_block,
+			    mydata->clust_size * mydata->sect_size);
+		if (ret) {
+			printf("Error: writing directory entry\n");
+			goto exit;
+		}
+	} else {
+		/* Set short name to set alias checksum field in dir_slot */
+		set_name(empty_dentptr, filename);
+		fill_dir_slot(mydata, &empty_dentptr, filename);
+
+		ret = start_cluster = find_empty_cluster(mydata);
+		if (ret < 0) {
+			printf("Error: finding empty cluster\n");
+			goto exit;
+		}
+
+		ret = check_overflow(mydata, start_cluster, size);
+		if (ret) {
+			printf("Error: %ld overflow\n", size);
+			goto exit;
+		}
+
+		/* Set attribute as archieve for regular file */
+		fill_dentry(mydata, empty_dentptr, filename,
+			start_cluster, size, 0x20);
+
+		ret = set_contents(mydata, empty_dentptr, buffer, size);
+		if (ret < 0) {
+			printf("Error: writing contents\n");
+			goto exit;
+		}
+		write_size = ret;
+		debug("attempt to write 0x%x bytes\n", write_size);
+
+		/* Flush fat buffer */
+		ret = flush_fat_buffer(mydata);
+		if (ret) {
+			printf("Error: flush fat buffer\n");
+			goto exit;
+		}
+
+		/* Write directory table to device */
+		ret = set_cluster(mydata, dir_curclust,
+			    get_dentfromdir_block,
+			    mydata->clust_size * mydata->sect_size);
+		if (ret) {
+			printf("Error: writing directory entry\n");
+			goto exit;
+		}
+	}
+
+exit:
+	free(mydata->fatbuf);
+	return ret < 0 ? ret : write_size;
+}
+
+int file_fat_write(const char *filename, void *buffer, unsigned long maxsize)
+{
+	printf("writing %s\n", filename);
+	return do_fat_write(filename, buffer, maxsize);
+}
diff --git a/u-boot/fs/fat/file.c b/u-boot/fs/fat/file.c
index 59c5d37..59c5d37 100644..100755
--- a/u-boot/fs/fat/file.c
+++ b/u-boot/fs/fat/file.c
diff --git a/u-boot/fs/fs.c b/u-boot/fs/fs.c
new file mode 100755
index 0000000..ce62faa
--- /dev/null
+++ b/u-boot/fs/fs.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <part.h>
+#include <ext4fs.h>
+#include <fat.h>
+#include <fs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static block_dev_desc_t *fs_dev_desc;
+static disk_partition_t fs_partition;
+static int fs_type = FS_TYPE_ANY;
+
+static inline int fs_ls_unsupported(const char *dirname)
+{
+	printf("** Unrecognized filesystem type **\n");
+	return -1;
+}
+
+static inline int fs_read_unsupported(const char *filename, ulong addr,
+				      int offset, int len)
+{
+	printf("** Unrecognized filesystem type **\n");
+	return -1;
+}
+
+#ifdef CONFIG_FS_FAT
+static int fs_probe_fat(void)
+{
+	return fat_set_blk_dev(fs_dev_desc, &fs_partition);
+}
+
+static void fs_close_fat(void)
+{
+}
+
+#define fs_ls_fat file_fat_ls
+
+static int fs_read_fat(const char *filename, ulong addr, int offset, int len)
+{
+	int len_read;
+
+	len_read = file_fat_read_at(filename, offset,
+				    (unsigned char *)addr, len);
+	if (len_read == -1) {
+		printf("** Unable to read file %s **\n", filename);
+		return -1;
+	}
+
+	return len_read;
+}
+#else
+static inline int fs_probe_fat(void)
+{
+	return -1;
+}
+
+static inline void fs_close_fat(void)
+{
+}
+
+#define fs_ls_fat fs_ls_unsupported
+#define fs_read_fat fs_read_unsupported
+#endif
+
+#ifdef CONFIG_FS_EXT4
+static int fs_probe_ext(void)
+{
+	ext4fs_set_blk_dev(fs_dev_desc, &fs_partition);
+
+	if (!ext4fs_mount(fs_partition.size)) {
+		ext4fs_close();
+		return -1;
+	}
+
+	return 0;
+}
+
+static void fs_close_ext(void)
+{
+	ext4fs_close();
+}
+
+#define fs_ls_ext ext4fs_ls
+
+static int fs_read_ext(const char *filename, ulong addr, int offset, int len)
+{
+	int file_len;
+	int len_read;
+
+	if (offset != 0) {
+		printf("** Cannot support non-zero offset **\n");
+		return -1;
+	}
+
+	file_len = ext4fs_open(filename);
+	if (file_len < 0) {
+		printf("** File not found %s **\n", filename);
+		ext4fs_close();
+		return -1;
+	}
+
+	if (len == 0)
+		len = file_len;
+
+	len_read = ext4fs_read((char *)addr, len);
+	ext4fs_close();
+
+	if (len_read != len) {
+		printf("** Unable to read file %s **\n", filename);
+		return -1;
+	}
+
+	return len_read;
+}
+#else
+static inline int fs_probe_ext(void)
+{
+	return -1;
+}
+
+static inline void fs_close_ext(void)
+{
+}
+
+#define fs_ls_ext fs_ls_unsupported
+#define fs_read_ext fs_read_unsupported
+#endif
+
+static struct {
+	int fstype;
+	int (*probe)(void);
+} fstypes[] = {
+	{
+		.fstype = FS_TYPE_FAT,
+		.probe = fs_probe_fat,
+	},
+	{
+		.fstype = FS_TYPE_EXT,
+		.probe = fs_probe_ext,
+	},
+};
+
+int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
+{
+	int part, i;
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+	static int relocated;
+
+	if (!relocated) {
+		for (i = 0; i < ARRAY_SIZE(fstypes); i++)
+			fstypes[i].probe += gd->reloc_off;
+		relocated = 1;
+	}
+#endif
+
+	part = get_device_and_partition(ifname, dev_part_str, &fs_dev_desc,
+					&fs_partition, 1);
+	if (part < 0)
+		return -1;
+
+	for (i = 0; i < ARRAY_SIZE(fstypes); i++) {
+		if ((fstype != FS_TYPE_ANY) && (fstype != fstypes[i].fstype))
+			continue;
+
+		if (!fstypes[i].probe()) {
+			fs_type = fstypes[i].fstype;
+			return 0;
+		}
+	}
+
+	printf("** Unrecognized filesystem type **\n");
+	return -1;
+}
+
+static void fs_close(void)
+{
+	switch (fs_type) {
+	case FS_TYPE_FAT:
+		fs_close_fat();
+		break;
+	case FS_TYPE_EXT:
+		fs_close_ext();
+		break;
+	default:
+		break;
+	}
+
+	fs_type = FS_TYPE_ANY;
+}
+
+int fs_ls(const char *dirname)
+{
+	int ret;
+
+	switch (fs_type) {
+	case FS_TYPE_FAT:
+		ret = fs_ls_fat(dirname);
+		break;
+	case FS_TYPE_EXT:
+		ret = fs_ls_ext(dirname);
+		break;
+	default:
+		ret = fs_ls_unsupported(dirname);
+		break;
+	}
+
+	fs_close();
+
+	return ret;
+}
+
+int fs_read(const char *filename, ulong addr, int offset, int len)
+{
+	int ret;
+
+	switch (fs_type) {
+	case FS_TYPE_FAT:
+		ret = fs_read_fat(filename, addr, offset, len);
+		break;
+	case FS_TYPE_EXT:
+		ret = fs_read_ext(filename, addr, offset, len);
+		break;
+	default:
+		ret = fs_read_unsupported(filename, addr, offset, len);
+		break;
+	}
+
+	fs_close();
+
+	return ret;
+}
+
+#define CMD_RET_USAGE cmd_usage(cmdtp)
+
+int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+		int fstype, int cmdline_base)
+{
+	unsigned long addr;
+	const char *addr_str;
+	const char *filename;
+	unsigned long bytes;
+	unsigned long pos;
+	int len_read;
+	char buf[12];
+	unsigned long time;
+
+	if (argc < 2)
+		return CMD_RET_USAGE;
+	if (argc > 7)
+		return CMD_RET_USAGE;
+
+	if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
+		return 1;
+
+	if (argc >= 4) {
+		addr = simple_strtoul(argv[3], NULL, cmdline_base);
+	} else {
+		addr_str = getenv("loadaddr");
+		if (addr_str != NULL)
+			addr = simple_strtoul(addr_str, NULL, 16);
+		else
+			addr = CONFIG_SYS_LOAD_ADDR;
+	}
+	if (argc >= 5) {
+		filename = argv[4];
+	} else {
+		filename = getenv("bootfile");
+		if (!filename) {
+			puts("** No boot file defined **\n");
+			return 1;
+		}
+	}
+	if (argc >= 6)
+		bytes = simple_strtoul(argv[5], NULL, cmdline_base);
+	else
+		bytes = 0;
+	if (argc >= 7)
+		pos = simple_strtoul(argv[6], NULL, cmdline_base);
+	else
+		pos = 0;
+
+	time = get_timer(0);
+	len_read = fs_read(filename, addr, pos, bytes);
+	time = get_timer(time);
+	if (len_read <= 0)
+		return 1;
+
+	printf("%d bytes read in %lu ms", len_read, time);
+	if (time > 0) {
+		puts(" (");
+		print_size(len_read / time * 1000, "/s");
+		puts(")");
+	}
+	puts("\n");
+
+	sprintf(buf, "0x%x", len_read);
+	setenv("filesize", buf);
+
+	return 0;
+}
+
+int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+	int fstype)
+{
+	if (argc < 2)
+		return CMD_RET_USAGE;
+	if (argc > 4)
+		return CMD_RET_USAGE;
+
+	if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
+		return 1;
+
+	if (fs_ls(argc >= 4 ? argv[3] : "/"))
+		return 1;
+
+	return 0;
+}
diff --git a/u-boot/include/common.h b/u-boot/include/common.h
index d8c912d..d5ec64d 100644
--- a/u-boot/include/common.h
+++ b/u-boot/include/common.h
@@ -750,4 +750,91 @@ int cpu_release(int nr, int argc, char * const argv[]);
 #define ALIGN(x,a)		__ALIGN_MASK((x),(typeof(x))(a)-1)
 #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
 
+/*
+ * ARCH_DMA_MINALIGN is defined in asm/cache.h for each architecture.  It
+ * is used to align DMA buffers.
+ */
+#ifndef __ASSEMBLY__
+// #include <asm/cache.h>
+#define ARCH_DMA_MINALIGN	64	// for ARM
+#endif
+
+/*
+ * The ALLOC_CACHE_ALIGN_BUFFER macro is used to allocate a buffer on the
+ * stack that meets the minimum architecture alignment requirements for DMA.
+ * Such a buffer is useful for DMA operations where flushing and invalidating
+ * the cache before and after a read and/or write operation is required for
+ * correct operations.
+ *
+ * When called the macro creates an array on the stack that is sized such
+ * that:
+ *
+ * 1) The beginning of the array can be advanced enough to be aligned.
+ *
+ * 2) The size of the aligned portion of the array is a multiple of the minimum
+ *    architecture alignment required for DMA.
+ *
+ * 3) The aligned portion contains enough space for the original number of
+ *    elements requested.
+ *
+ * The macro then creates a pointer to the aligned portion of this array and
+ * assigns to the pointer the address of the first element in the aligned
+ * portion of the array.
+ *
+ * Calling the macro as:
+ *
+ *     ALLOC_CACHE_ALIGN_BUFFER(uint32_t, buffer, 1024);
+ *
+ * Will result in something similar to saying:
+ *
+ *     uint32_t    buffer[1024];
+ *
+ * The following differences exist:
+ *
+ * 1) The resulting buffer is guaranteed to be aligned to the value of
+ *    ARCH_DMA_MINALIGN.
+ *
+ * 2) The buffer variable created by the macro is a pointer to the specified
+ *    type, and NOT an array of the specified type.  This can be very important
+ *    if you want the address of the buffer, which you probably do, to pass it
+ *    to the DMA hardware.  The value of &buffer is different in the two cases.
+ *    In the macro case it will be the address of the pointer, not the address
+ *    of the space reserved for the buffer.  However, in the second case it
+ *    would be the address of the buffer.  So if you are replacing hard coded
+ *    stack buffers with this macro you need to make sure you remove the & from
+ *    the locations where you are taking the address of the buffer.
+ *
+ * Note that the size parameter is the number of array elements to allocate,
+ * not the number of bytes.
+ *
+ * This macro can not be used outside of function scope, or for the creation
+ * of a function scoped static buffer.  It can not be used to create a cache
+ * line aligned global buffer.
+ */
+#define ALLOC_ALIGN_BUFFER(type, name, size, align)			\
+char __##name[ROUND(size * sizeof(type), align) + (align - 1)];	\
+\
+type *name = (type *) ALIGN((uintptr_t)__##name, align)
+#define ALLOC_CACHE_ALIGN_BUFFER(type, name, size)			\
+ALLOC_ALIGN_BUFFER(type, name, size, ARCH_DMA_MINALIGN)
+
+/*
+ * DEFINE_CACHE_ALIGN_BUFFER() is similar to ALLOC_CACHE_ALIGN_BUFFER, but it's
+ * purpose is to allow allocating aligned buffers outside of function scope.
+ * Usage of this macro shall be avoided or used with extreme care!
+ */
+#define DEFINE_ALIGN_BUFFER(type, name, size, align)			\
+static char __##name[roundup(size * sizeof(type), align)]	\
+__attribute__((aligned(align)));				\
+\
+static type *name = (type *)__##name
+#define DEFINE_CACHE_ALIGN_BUFFER(type, name, size)			\
+DEFINE_ALIGN_BUFFER(type, name, size, ARCH_DMA_MINALIGN)
+
+/* Pull in stuff for the build system */
+#ifdef DO_DEPS_ONLY
+# include <environment.h>
+#endif
+
+
 #endif	/* __COMMON_H_ */
diff --git a/u-boot/include/config_defaults.h b/u-boot/include/config_defaults.h
index abdf3be..c822bbd 100644
--- a/u-boot/include/config_defaults.h
+++ b/u-boot/include/config_defaults.h
@@ -17,5 +17,6 @@
 
 #define CONFIG_GZIP 1
 #define CONFIG_ZLIB 1
+#define CONFIG_PARTITIONS 1
 
 #endif
diff --git a/u-boot/include/configs/omap3_beagle.h b/u-boot/include/configs/omap3_beagle.h
index 519da79..9866d49 100644
--- a/u-boot/include/configs/omap3_beagle.h
+++ b/u-boot/include/configs/omap3_beagle.h
@@ -322,7 +322,7 @@
 #define CONFIG_ENV_OFFSET		boot_flash_off
 #define CONFIG_ENV_ADDR			SMNAND_ENV_OFFSET
 
-#define CONFIG_START_WITH_DEFAULT_ENVIRONMENT 1
+//#define CONFIG_START_WITH_DEFAULT_ENVIRONMENT 1
 
 #ifndef __ASSEMBLY__
 extern unsigned int boot_flash_base;
diff --git a/u-boot/include/configs/omap3_gta04.h b/u-boot/include/configs/omap3_gta04.h
index c6269af..69eb055 100644
--- a/u-boot/include/configs/omap3_gta04.h
+++ b/u-boot/include/configs/omap3_gta04.h
@@ -31,15 +31,13 @@
 
 #define CONFIG_CMD_UNZIP	1	/* for reducing size of splash image */
 
-// #undef CONFIG_CMD_JFFS2
-// #define CONFIG_CMD_JFFS2	1	/* to access the rootfs in NAND flash */
-// FIXME: needs to add configs for the partitions so that JFFS2 runs in the correct NAND partition
-
-#define CONFIG_CMD_UBIFS	1
-
-#define CONFIG_CMD_EXT2 1
-#define CONFIG_CMD_EXT4 1
+// #define CONFIG_CMD_UBIFS	1	// broken
 
+#define CONFIG_FS_FAT		1
+#define CONFIG_FS_EXT2		1
+#define CONFIG_FS_EXT4		1
+#define CONFIG_CMD_FS		1
+#define CONFIG_CMD_EXT4		1
 
 #undef CONFIG_SYS_PROMPT
 #define CONFIG_SYS_PROMPT		"GTA04 # "
diff --git a/u-boot/include/fat.h b/u-boot/include/fat.h
index afb2116..706cd7a 100644..100755
--- a/u-boot/include/fat.h
+++ b/u-boot/include/fat.h
@@ -33,22 +33,15 @@
 /* Maximum Long File Name length supported here is 128 UTF-16 code units */
 #define VFAT_MAXLEN_BYTES	256 /* Maximum LFN buffer in bytes */
 #define VFAT_MAXSEQ		9   /* Up to 9 of 13 2-byte UTF-16 entries */
-#define LINEAR_PREFETCH_SIZE	(SECTOR_SIZE*2) /* Prefetch buffer size */
-
-#define SECTOR_SIZE FS_BLOCK_SIZE
-
-#define FS_BLOCK_SIZE	512
-
-#if FS_BLOCK_SIZE != SECTOR_SIZE
-#error FS_BLOCK_SIZE != SECTOR_SIZE - This code needs to be fixed!
-#endif
+#define PREFETCH_BLOCKS		2
 
 #define MAX_CLUSTSIZE	65536
-#define DIRENTSPERBLOCK	(FS_BLOCK_SIZE/sizeof(dir_entry))
-#define DIRENTSPERCLUST	((mydata->clust_size*SECTOR_SIZE)/sizeof(dir_entry))
+#define DIRENTSPERBLOCK	(mydata->sect_size / sizeof(dir_entry))
+#define DIRENTSPERCLUST	((mydata->clust_size * mydata->sect_size) / \
+			 sizeof(dir_entry))
 
 #define FATBUFBLOCKS	6
-#define FATBUFSIZE	(FS_BLOCK_SIZE*FATBUFBLOCKS)
+#define FATBUFSIZE	(mydata->sect_size * FATBUFBLOCKS)
 #define FAT12BUFSIZE	((FATBUFSIZE*2)/3)
 #define FAT16BUFSIZE	(FATBUFSIZE/2)
 #define FAT32BUFSIZE	(FATBUFSIZE/4)
@@ -106,6 +99,8 @@
 #endif
 
 #define TOLOWER(c)	if((c) >= 'A' && (c) <= 'Z'){(c)+=('a' - 'A');}
+#define TOUPPER(c)	if ((c) >= 'a' && (c) <= 'z') \
+				(c) -= ('a' - 'A');
 #define START(dent)	(FAT2CPU16((dent)->start) \
 			+ (mydata->fatsize != 32 ? 0 : \
 			  (FAT2CPU16((dent)->starthi) << 16)))
@@ -181,13 +176,14 @@ typedef struct dir_slot {
  * (see FAT32 accesses)
  */
 typedef struct {
-	__u8	fatbuf[FATBUFSIZE]; /* Current FAT buffer */
+	__u8	*fatbuf;	/* Current FAT buffer */
 	int	fatsize;	/* Size of FAT in bits */
-	__u16	fatlength;	/* Length of FAT in sectors */
+	__u32	fatlength;	/* Length of FAT in sectors */
 	__u16	fat_sect;	/* Starting sector of the FAT */
-	__u16	rootdir_sect;	/* Start sector of root directory */
+	__u32	rootdir_sect;	/* Start sector of root directory */
+	__u16	sect_size;	/* Size of sectors in bytes */
 	__u16	clust_size;	/* Size of clusters in sectors */
-	short	data_begin;	/* The sector of the first cluster, can be negative */
+	int	data_begin;	/* The sector of the first cluster, can be negative */
 	int	fatbufnum;	/* Used by get_fatent, init to -1 */
 } fsdata;
 
@@ -212,8 +208,12 @@ file_read_func		file_fat_read;
 int file_cd(const char *path);
 int file_fat_detectfs(void);
 int file_fat_ls(const char *dir);
+long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+		      unsigned long maxsize);
 long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
 const char *file_getfsname(int idx);
+int fat_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
 int fat_register_device(block_dev_desc_t *dev_desc, int part_no);
 
+int file_fat_write(const char *filename, void *buffer, unsigned long maxsize);
 #endif /* _FAT_H_ */
diff --git a/u-boot/include/fs.h b/u-boot/include/fs.h
new file mode 100755
index 0000000..4f30a38
--- /dev/null
+++ b/u-boot/include/fs.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _FS_H
+#define _FS_H
+
+#include <common.h>
+
+#define FS_TYPE_ANY	0
+#define FS_TYPE_FAT	1
+#define FS_TYPE_EXT	2
+
+/*
+ * Tell the fs layer which block device an partition to use for future
+ * commands. This also internally identifies the filesystem that is present
+ * within the partition. The identification process may be limited to a
+ * specific filesystem type by passing FS_* in the fstype parameter.
+ *
+ * Returns 0 on success.
+ * Returns non-zero if there is an error accessing the disk or partition, or
+ * no known filesystem type could be recognized on it.
+ */
+int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
+
+/*
+ * Print the list of files on the partition previously set by fs_set_blk_dev(),
+ * in directory "dirname".
+ *
+ * Returns 0 on success. Returns non-zero on error.
+ */
+int fs_ls(const char *dirname);
+
+/*
+ * Read file "filename" from the partition previously set by fs_set_blk_dev(),
+ * to address "addr", starting at byte offset "offset", and reading "len"
+ * bytes. "offset" may be 0 to read from the start of the file. "len" may be
+ * 0 to read the entire file. Note that not all filesystem types support
+ * either/both offset!=0 or len!=0.
+ *
+ * Returns number of bytes read on success. Returns <= 0 on error.
+ */
+int fs_read(const char *filename, ulong addr, int offset, int len);
+
+/*
+ * Common implementation for various filesystem commands, optionally limited
+ * to a specific filesystem type via the fstype parameter.
+ */
+int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+		int fstype, int cmdline_base);
+int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+		int fstype);
+
+#endif /* _FS_H */
diff --git a/u-boot/include/part.h b/u-boot/include/part.h
index 3cdae02..27ea283 100644..100755
--- a/u-boot/include/part.h
+++ b/u-boot/include/part.h
@@ -36,7 +36,7 @@ typedef struct block_dev_desc {
 #ifdef CONFIG_LBA48
 	unsigned char	lba48;		/* device can use 48bit addr (ATA/ATAPI v7) */
 #endif
-	lbaint_t		lba;		/* number of blocks */
+	lbaint_t	lba;		/* number of blocks */
 	unsigned long	blksz;		/* block size */
 	char		vendor [40+1];	/* IDE model, SCSI Vendor */
 	char		product[20+1];	/* IDE Serial no, SCSI product */
@@ -49,6 +49,9 @@ typedef struct block_dev_desc {
 				       unsigned long start,
 				       lbaint_t blkcnt,
 				       const void *buffer);
+	unsigned long   (*block_erase)(int dev,
+				       unsigned long start,
+				       lbaint_t blkcnt);
 	void		*priv;		/* driver private struct pointer */
 }block_dev_desc_t;
 
@@ -90,10 +93,15 @@ typedef struct disk_partition {
 	ulong	blksz;		/* block size in bytes			*/
 	uchar	name[32];	/* partition name			*/
 	uchar	type[32];	/* string type description		*/
+	int	bootable;	/* Active/Bootable flag is set		*/
+#ifdef CONFIG_PARTITION_UUIDS
+	char	uuid[37];	/* filesystem UUID as string, if exists	*/
+#endif
 } disk_partition_t;
 
 /* Misc _get_dev functions */
-block_dev_desc_t* get_dev(char* ifname, int dev);
+#ifdef CONFIG_PARTITIONS
+block_dev_desc_t *get_dev(const char *ifname, int dev);
 block_dev_desc_t* ide_get_dev(int dev);
 block_dev_desc_t* sata_get_dev(int dev);
 block_dev_desc_t* scsi_get_dev(int dev);
@@ -107,7 +115,37 @@ int get_partition_info (block_dev_desc_t * dev_desc, int part, disk_partition_t
 void print_part (block_dev_desc_t *dev_desc);
 void  init_part (block_dev_desc_t *dev_desc);
 void dev_print(block_dev_desc_t *dev_desc);
-
+int get_device(const char *ifname, const char *dev_str,
+	       block_dev_desc_t **dev_desc);
+int get_device_and_partition(const char *ifname, const char *dev_part_str,
+			     block_dev_desc_t **dev_desc,
+			     disk_partition_t *info, int allow_whole_dev);
+#else
+static inline block_dev_desc_t *get_dev(const char *ifname, int dev)
+{ return NULL; }
+static inline block_dev_desc_t* ide_get_dev(int dev) { return NULL; }
+static inline block_dev_desc_t* sata_get_dev(int dev) { return NULL; }
+static inline block_dev_desc_t* scsi_get_dev(int dev) { return NULL; }
+static inline block_dev_desc_t* usb_stor_get_dev(int dev) { return NULL; }
+static inline block_dev_desc_t* mmc_get_dev(int dev) { return NULL; }
+static inline block_dev_desc_t* systemace_get_dev(int dev) { return NULL; }
+static inline block_dev_desc_t* mg_disk_get_dev(int dev) { return NULL; }
+
+static inline int get_partition_info (block_dev_desc_t * dev_desc, int part,
+	disk_partition_t *info) { return -1; }
+static inline void print_part (block_dev_desc_t *dev_desc) {}
+static inline void  init_part (block_dev_desc_t *dev_desc) {}
+static inline void dev_print(block_dev_desc_t *dev_desc) {}
+static inline int get_device(const char *ifname, const char *dev_str,
+	       block_dev_desc_t **dev_desc)
+{ return -1; }
+static inline int get_device_and_partition(const char *ifname,
+					   const char *dev_part_str,
+					   block_dev_desc_t **dev_desc,
+					   disk_partition_t *info,
+					   int allow_whole_dev)
+{ *dev_desc = NULL; return -1; }
+#endif
 
 #ifdef CONFIG_MAC_PARTITION
 /* disk/part_mac.c */