diff --git a/tools/ota/Android.mk b/tools/ota/Android.mk
new file mode 100644
index 0000000..43e2135
--- /dev/null
+++ b/tools/ota/Android.mk
@@ -0,0 +1,20 @@
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := make-update-script
+LOCAL_SRC_FILES := make-update-script.c
+include $(BUILD_HOST_EXECUTABLE)
diff --git a/tools/ota/add-data-wipe b/tools/ota/add-data-wipe
new file mode 100755
index 0000000..8d2626f
--- /dev/null
+++ b/tools/ota/add-data-wipe
@@ -0,0 +1,118 @@
+#!/bin/bash
+#
+# Copyright (C) 2007 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+PROGNAME=`basename $0`
+
+function cleantmp
+{
+    if [ ! -z "$TMPDIR" ]
+    then
+        rm -rf "$TMPDIR"
+        TMPDIR=
+    fi
+}
+
+function println
+{
+    if [ $# -gt 0 ]
+    then
+        echo "$PROGNAME: $@"
+    fi
+}
+
+function fail
+{
+    println "$@"
+    cleantmp
+    exit 1
+}
+
+function usage
+{
+    println "$@"
+    echo "Usage: $PROGNAME <input file> <output file>"
+    fail
+}
+
+OTATOOL=`which otatool`
+if [ -z "$OTATOOL" ]
+then
+    OTATOOL="`dirname $0`/otatool"
+    if [ ! -x "$OTATOOL" ]
+    then
+        fail "Can't find otatool"
+    fi
+fi
+
+
+if [ $# -ne 2 ]
+then
+    usage
+fi
+
+INFILE="$1"
+OUTFILE="$2"
+
+if [ ! -f "$INFILE" ]
+then
+    fail "$INFILE doesn't exist or isn't a file"
+fi
+
+if [ -z "$OUTFILE" ]
+then
+    usage "Output file not specified"
+fi
+
+if [ -d "$OUTFILE" ]
+then
+    usage "Output file may not be a directory"
+fi
+
+if [ "$INFILE" -ef "$OUTFILE" ]
+then
+    fail "Refusing to use the input file as the output file"
+fi
+
+TMPDIR=`mktemp -d "/tmp/$PROGNAME.XXXXXX"`
+if [ $? -ne 0 ]
+then
+    TMPDIR=
+    fail "Can't create temporary directory"
+fi
+
+ORIGSCRIPT="$TMPDIR/orig"
+NEWSCRIPT="$TMPDIR/new"
+
+"$OTATOOL" --dump-script "$INFILE" |
+awk '
+    { print }
+    /^format SYSTEM:$/ {
+        print "delete_recursive DATA:"
+    }
+' > "$NEWSCRIPT"
+if [ $? -ne 0 ]
+then
+    fail "Couldn't modify script"
+fi
+
+"$OTATOOL" --replace-script "$NEWSCRIPT" -o "$OUTFILE" "$INFILE"
+if [ $? -ne 0 ]
+then
+    fail "Couldn't replace script"
+fi
+
+cleantmp
diff --git a/tools/ota/convert-to-bmp.py b/tools/ota/convert-to-bmp.py
new file mode 100644
index 0000000..446c09d
--- /dev/null
+++ b/tools/ota/convert-to-bmp.py
@@ -0,0 +1,79 @@
+#!/usr/bin/python2.4
+
+"""A simple script to convert asset images to BMP files, that supports
+RGBA image."""
+
+import struct
+import Image
+import sys
+
+infile = sys.argv[1]
+outfile = sys.argv[2]
+
+if not outfile.endswith(".bmp"):
+  print >> sys.stderr, "Warning: I'm expecting to write BMP files."
+
+im = Image.open(infile)
+if im.mode == 'RGB':
+  im.save(outfile)
+elif im.mode == 'RGBA':
+  # Python Imaging Library doesn't write RGBA BMP files, so we roll
+  # our own.
+
+  BMP_HEADER_FMT = ("<"      # little-endian
+                    "H"      # signature
+                    "L"      # file size
+                    "HH"     # reserved (set to 0)
+                    "L"      # offset to start of bitmap data)
+                    )
+
+  BITMAPINFO_HEADER_FMT= ("<"      # little-endian
+                          "L"      # size of this struct
+                          "L"      # width
+                          "L"      # height
+                          "H"      # planes (set to 1)
+                          "H"      # bit count
+                          "L"      # compression (set to 0 for minui)
+                          "L"      # size of image data (0 if uncompressed)
+                          "L"      # x pixels per meter (1)
+                          "L"      # y pixels per meter (1)
+                          "L"      # colors used (0)
+                          "L"      # important colors (0)
+                          )
+
+  fileheadersize = struct.calcsize(BMP_HEADER_FMT)
+  infoheadersize = struct.calcsize(BITMAPINFO_HEADER_FMT)
+
+  header = struct.pack(BMP_HEADER_FMT,
+                       0x4d42,   # "BM" in little-endian
+                       (fileheadersize + infoheadersize +
+                        im.size[0] * im.size[1] * 4),
+                       0, 0,
+                       fileheadersize + infoheadersize)
+
+  info = struct.pack(BITMAPINFO_HEADER_FMT,
+                     infoheadersize,
+                     im.size[0],
+                     im.size[1],
+                     1,
+                     32,
+                     0,
+                     0,
+                     1,
+                     1,
+                     0,
+                     0)
+
+  f = open(outfile, "wb")
+  f.write(header)
+  f.write(info)
+  data = im.tostring()
+  for j in range(im.size[1]-1, -1, -1):   # rows bottom-to-top
+    for i in range(j*im.size[0]*4, (j+1)*im.size[0]*4, 4):
+      f.write(data[i+2])    # B
+      f.write(data[i+1])    # G
+      f.write(data[i+0])    # R
+      f.write(data[i+3])    # A
+  f.close()
+else:
+  print >> sys.stderr, "Don't know how to handle image mode '%s'." % (im.mode,)
diff --git a/tools/ota/make-update-script.c b/tools/ota/make-update-script.c
new file mode 100644
index 0000000..0fb7ed0
--- /dev/null
+++ b/tools/ota/make-update-script.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "private/android_filesystem_config.h"
+
+#include <dirent.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+/*
+ * Recursively walk the directory tree at <sysdir>/<subdir>, writing
+ * script commands to set permissions and create symlinks.
+ * Assume the contents already have the specified default permissions,
+ * so only output commands if they need to be changed from the defaults.
+ *
+ * Note that permissions are set by fs_config(), which uses a lookup table of
+ * Android permissions.  They are not drawn from the build host filesystem.
+ */
+static void walk_files(
+        const char *sysdir, const char *subdir,
+        unsigned default_uid, unsigned default_gid,
+        unsigned default_dir_mode, unsigned default_file_mode) {
+    const char *sep = strcmp(subdir, "") ? "/" : "";
+
+    char fn[PATH_MAX];
+    unsigned dir_uid = 0, dir_gid = 0, dir_mode = 0;
+    snprintf(fn, PATH_MAX, "system%s%s", sep, subdir);
+    fs_config(fn, 1, &dir_uid, &dir_gid, &dir_mode);
+
+    snprintf(fn, PATH_MAX, "%s%s%s", sysdir, sep, subdir);
+    DIR *dir = opendir(fn);
+    if (dir == NULL) {
+        perror(fn);
+        exit(1);
+    }
+
+    /*
+     * We can use "set_perm" and "set_perm_recursive" to set file permissions
+     * (owner, group, and file mode) for individual files and entire subtrees.
+     * We want to use set_perm_recursive efficiently to avoid setting the
+     * permissions of every single file in the system image individually.
+     *
+     * What we do is recursively set our entire subtree to the permissions
+     * used by the first file we encounter, and then use "set_perm" to adjust
+     * the permissions of subsequent files which don't match the first one.
+     * This is bad if the first file is an outlier, but it generally works.
+     * Subdirectories can do the same thing recursively if they're different.
+     */
+
+    int is_first = 1;
+    const struct dirent *e;
+    while ((e = readdir(dir))) {
+        // Skip over "." and ".." entries
+        if (!strcmp(e->d_name, ".") || !strcmp(e->d_name, "..")) continue;
+
+        if (e->d_type == DT_LNK) {  // Symlink
+
+            // Symlinks don't really have permissions, so this is orthogonal.
+            snprintf(fn, PATH_MAX, "%s/%s%s%s", sysdir, subdir, sep, e->d_name);
+            int len = readlink(fn, fn, PATH_MAX - 1);
+            if (len <= 0) {
+                perror(fn);
+                exit(1);
+            }
+            fn[len] = '\0';
+            printf("symlink %s SYSTEM:%s%s%s\n", fn, subdir, sep, e->d_name);
+
+        } else if (e->d_type == DT_DIR) {  // Subdirectory
+
+            // Use the parent directory as the model for default permissions.
+            // We haven't seen a file, so just make up some file defaults.
+            if (is_first && (
+                    dir_mode != default_dir_mode ||
+                    dir_uid != default_uid || dir_gid != default_gid)) {
+                default_uid = dir_uid;
+                default_gid = dir_gid;
+                default_dir_mode = dir_mode;
+                default_file_mode = dir_mode & default_file_mode & 0666;
+                printf("set_perm_recursive %d %d 0%o 0%o SYSTEM:%s\n",
+                         default_uid, default_gid,
+                         default_dir_mode, default_file_mode,
+                         subdir);
+            }
+
+            is_first = 0;
+
+            // Recursively handle the subdirectory.
+            // Note, the recursive call handles the directory's own permissions.
+            snprintf(fn, PATH_MAX, "%s%s%s", subdir, sep, e->d_name);
+            walk_files(sysdir, fn,
+                    default_uid, default_gid,
+                    default_dir_mode, default_file_mode);
+
+        } else {  // Ordinary file
+
+            // Get the file's desired permissions.
+            unsigned file_uid = 0, file_gid = 0, file_mode = 0;
+            snprintf(fn, PATH_MAX, "system/%s%s%s", subdir, sep, e->d_name);
+            fs_config(fn, 0, &file_uid, &file_gid, &file_mode);
+
+            // If this is the first file, its mode gets to become the default.
+            if (is_first && (
+                    dir_mode != default_dir_mode ||
+                    file_mode != default_file_mode ||
+                    dir_uid != default_uid || file_uid != default_uid ||
+                    dir_gid != default_gid || file_gid != default_gid)) {
+                default_uid = dir_uid;
+                default_gid = dir_gid;
+                default_dir_mode = dir_mode;
+                default_file_mode = file_mode;
+                printf("set_perm_recursive %d %d 0%o 0%o SYSTEM:%s\n",
+                         default_uid, default_gid,
+                         default_dir_mode, default_file_mode,
+                         subdir);
+            }
+
+            is_first = 0;
+
+            // Otherwise, override this file if it doesn't match the defaults.
+            if (file_mode != default_file_mode ||
+                file_uid != default_uid || file_gid != default_gid) {
+                printf("set_perm %d %d 0%o SYSTEM:%s%s%s\n",
+                         file_uid, file_gid, file_mode,
+                         subdir, sep, e->d_name);
+            }
+
+        }
+    }
+
+    // Set the directory's permissions directly, if they never got set.
+    if (dir_mode != default_dir_mode ||
+        dir_uid != default_uid || dir_gid != default_gid) {
+        printf("set_perm %d %d 0%o SYSTEM:%s\n",
+                dir_uid, dir_gid, dir_mode, subdir);
+    }
+
+    closedir(dir);
+}
+
+/*
+ * Generate the update script (in "Amend", see commands/recovery/commands.c)
+ * for the complete-reinstall OTA update packages the build system makes.
+ *
+ * The generated script makes a variety of sanity checks about the device,
+ * erases and reinstalls system files, and sets file permissions appropriately.
+ */
+int main(int argc, char *argv[]) {
+    if (argc != 3) {
+        fprintf(stderr, "usage: %s systemdir android-info.txt >update-script\n",
+                argv[0]);
+        return 2;
+    }
+
+    // ensure basic recovery script language compatibility
+    printf("assert compatible_with(\"0.2\") == \"true\"\n");
+
+    // if known, make sure the device name is correct
+    const char *device = getenv("TARGET_PRODUCT");
+    if (device != NULL) {
+        printf("assert getprop(\"ro.product.device\") == \"%s\" || "
+                "getprop(\"ro.build.product\") == \"%s\"\n", device, device);
+    }
+
+    // scan android-info.txt to enforce compatibility with the target system
+    FILE *fp = fopen(argv[2], "r");
+    if (fp == NULL) {
+        perror(argv[2]);
+        return 1;
+    }
+
+    // The lines we're looking for look like:
+    //     version-bootloader=x.yy.zzzz
+    // or:
+    //     require version-bootloader=x.yy.zzzz
+    char line[256];
+    while (fgets(line, sizeof(line), fp)) {
+        const char *name = strtok(line, "="), *value = strtok(NULL, "\n");
+        if (value != NULL &&
+            (!strcmp(name, "version-bootloader") ||
+             !strcmp(name, "require version-bootloader"))) {
+            printf("assert getprop(\"ro.bootloader\") == \"%s\"\n", value);
+        }
+        // We also used to check version-baseband, but we update radio.img
+        // ourselves, so there's no need.
+    }
+
+    // erase the boot sector first, so if the update gets interrupted,
+    // the system will reboot into the recovery partition and start over.
+    printf("format BOOT:\n");
+
+    // write the radio image (actually just loads it into RAM for now)
+    printf("show_progress 0.1 0\n");
+    printf("write_radio_image PACKAGE:radio.img\n");
+
+    // erase and reinstall the system image
+    printf("show_progress 0.5 0\n");
+    printf("format SYSTEM:\n");
+    printf("copy_dir PACKAGE:system SYSTEM:\n");
+
+    // walk the files in the system image, set their permissions, etc.
+    // use -1 for default values to force permissions to be set explicitly.
+    walk_files(argv[1], "", -1, -1, -1, -1);
+
+    // as the last step, write the boot sector.
+    printf("show_progress 0.2 0\n");
+    printf("write_raw_image PACKAGE:boot.img BOOT:\n");
+
+    // after the end of the script, the radio will be written to cache
+    // leave some space in the progress bar for this operation
+    printf("show_progress 0.2 10\n");
+    return 0;
+}
diff --git a/tools/ota/otatool b/tools/ota/otatool
new file mode 100755
index 0000000..4b02629
--- /dev/null
+++ b/tools/ota/otatool
@@ -0,0 +1,225 @@
+#!/bin/bash
+#
+# Copyright (C) 2007 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+PROGNAME=`basename "$0"`
+
+INSTALL_SCRIPT_NAME=META-INF/com/android/update-script
+
+function cleantmp
+{
+    if [ ! -z "$TMPDIR" ]
+    then
+        rm -rf "$TMPDIR"
+        TMPDIR=
+    fi
+}
+
+function println
+{
+    if [ $# -gt 0 ]
+    then
+        echo "$PROGNAME: $@"
+    fi
+}
+
+function fail
+{
+    println "$@"
+    cleantmp
+    exit 1
+}
+
+function usage
+{
+    println "$@"
+    echo "Usage: $PROGNAME <command> [command-options] <ota-file>"
+    echo "       Where <command> is one of:"
+    echo "           --dump"
+    echo "               Dump a description of the ota file"
+    echo "           --dump-script"
+    echo "               Dumps the install script to standard out"
+    echo "           --append-script <file> -o|--output <outfile>"
+    echo "               Append the contents of <file> to the install script"
+    echo "           --replace-script <file> -o|--output <outfile>"
+    echo "               Replace the install script with the contents of <file>"
+    fail
+}
+
+if [ $# -lt 2 ]
+then
+    usage
+fi
+CMD="$1"
+shift
+if [ "$CMD" = --dump ]
+then
+    CMD_DUMP=1
+    UNPACK_FILE=1
+elif [ "$CMD" = --dump-script ]
+then
+    CMD_DUMP_SCRIPT=1
+elif [ "$CMD" = --append-script ]
+then
+    CMD_APPEND_SCRIPT=1
+    SCRIPT_FILE=$1
+    shift
+    NEEDS_SCRIPT_FILE=1
+    NEEDS_OUTPUT=1
+elif [ "$CMD" = --replace-script ]
+then
+    CMD_REPLACE_SCRIPT=1
+    SCRIPT_FILE=$1
+    shift
+    NEEDS_SCRIPT_FILE=1
+    NEEDS_OUTPUT=1
+else
+    usage "Unknown command $CMD"
+fi
+
+if [ ! -z "$NEED_SCRIPT_FILE" ]
+then
+    if [ -z "$SCRIPT_FILE" -o ! -f "$SCRIPT_FILE" ]
+    then
+        usage "$CMD requires a valid script file"
+    fi
+fi
+
+if [ ! -z "$NEEDS_OUTPUT" ]
+then
+    if [ "x$1" != "x-o" -a "x$1" != "x--output" ]
+    then
+        usage "$CMD requires \"-o <file>\" or \"--output <file>\""
+    fi
+    shift
+
+    OUTFILE="$1"
+    shift
+    if [ -z "$OUTFILE" ]
+    then
+        usage "$CMD requires \"-o <file>\" or \"--output <file>\""
+    fi
+    if [ -d "$OUTFILE" ]
+    then
+        fail "Output file \"$OUTFILE\" is a directory"
+    fi
+fi
+
+FILE="$1"
+if [ ! -f "$FILE" ]
+then
+    fail "$FILE doesn't exist or isn't a file"
+fi
+if [ ! -z "$OUTFILE" -a "$FILE" -ef "$OUTFILE" ]
+then
+    fail "Refusing to use the input file as the output file"
+fi
+
+if [ $CMD_DUMP_SCRIPT ]
+then
+    unzip -p "$FILE" "$INSTALL_SCRIPT_NAME"
+    exit 0
+fi
+
+# Create a temporary directory for scratch files.
+#
+TMPDIR=`mktemp -d /tmp/$PROGNAME.XXXXXX`
+if [ $? -ne 0 ]
+then
+    TMPDIR=
+    fail "Can't create temporary directory"
+fi
+
+
+if [ $UNPACK_FILE ]
+then
+    ROOTDIR="$TMPDIR/root"
+    mkdir -p "$ROOTDIR"
+
+    println "Unpacking `basename $FILE`..."
+
+    unzip -q -d "$ROOTDIR" "$FILE"
+    if [ $? -ne 0 ]
+    then
+        fail "Couldn't unpack $FILE"
+    fi
+fi
+
+
+if [ $CMD_DUMP ]
+then
+    function dumpfile
+    {
+        echo "BEGIN `basename $1`"
+        cat "$1" | sed -e 's/^/    /'
+        echo "END `basename $1`"
+    }
+
+    echo Contents of root:
+    ls -1 "$ROOTDIR" | sed -e 's/^/    /'
+    echo
+    echo Contents of META-INF:
+    (cd "$ROOTDIR" && find META-INF -type f) | sed -e 's/^/    /'
+
+    echo
+    dumpfile "$ROOTDIR/META-INF/MANIFEST.MF"
+    echo
+    dumpfile "$ROOTDIR/$INSTALL_SCRIPT_NAME"
+    echo
+    dumpfile "$ROOTDIR/android-product.txt"
+    echo
+    dumpfile "$ROOTDIR/system/build.prop"
+fi
+
+if [ $CMD_APPEND_SCRIPT ]
+then
+    TMPSCRIPT="$TMPDIR/script"
+    NEWSCRIPT="$TMPDIR/$INSTALL_SCRIPT_NAME"
+    unzip -p "$FILE" "$INSTALL_SCRIPT_NAME" > "$TMPSCRIPT"
+    if [ $? -ne 0 ]
+    then
+        fail "Couldn't extract $INSTALL_SCRIPT_NAME from $FILE"
+    fi
+    mkdir -p `dirname "$NEWSCRIPT"`
+    cat "$TMPSCRIPT" "$SCRIPT_FILE" > "$NEWSCRIPT"
+
+    OVERWRITE_SCRIPT=1
+fi
+
+if [ $CMD_REPLACE_SCRIPT ]
+then
+    NEWSCRIPT="$TMPDIR/$INSTALL_SCRIPT_NAME"
+    mkdir -p `dirname "$NEWSCRIPT"`
+    cp "$SCRIPT_FILE" "$NEWSCRIPT"
+
+    OVERWRITE_SCRIPT=1
+fi
+
+if [ $OVERWRITE_SCRIPT ]
+then
+    cp "$FILE" "$TMPDIR/outfile.zip"
+    (cd "$TMPDIR" && zip -qu outfile.zip "$INSTALL_SCRIPT_NAME")
+    if [ $? -ne 0 ]
+    then
+        fail "Couldn't add new $INSTALL_SCRIPT_NAME to output file"
+    fi
+
+    rm -f "$OUTFILE"
+    mkdir -p `dirname "$OUTFILE"`
+    mv "$TMPDIR/outfile.zip" "$OUTFILE"
+fi
+
+cleantmp