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diff --git a/tools/agptek_rocker/Dockerfile b/tools/agptek_rocker/Dockerfile
new file mode 100644
index 0000000000..de6a234474
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+++ b/tools/agptek_rocker/Dockerfile
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+FROM debian:9
+
+WORKDIR /home/rb
+ENV HOME /home/rb
+
+# Install tools needed
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+    build-essential \
+    git \
+    perl \
+    curl \
+    texinfo \
+    flex \
+    bison \
+    bzip2 \
+    gzip \
+    zip \
+    patch \
+    automake \
+    libtool \
+    libtool-bin \
+    autoconf \
+    libmpc-dev \
+    gawk \
+    python \
+    python-lzo \
+    python-setuptools \ 
+    mtd-utils \
+    xorriso && \
+    rm -rf /var/lib/apt/lists/*
+
+# Clone rockbox repository
+RUN cd /home/rb && \
+    git clone https://github.com/wodz/rockbox-wodz.git
+
+# Build cross toolchain (It takes quite long)
+RUN cd /home/rb/rockbox-wodz && \
+    git checkout agptek-rocker && \
+    ./tools/rockboxdev.sh --target=y
+
+# Install tools for unpacking ubifs
+RUN cd /home/rb && \
+    git clone https://github.com/jrspruitt/ubi_reader.git && \
+    cd /home/rb/ubi_reader && \
+    python setup.py install
+
+# Copy build script
+RUN cp /home/rb/rockbox-wodz/tools/agptek_rocker/bootloader_install.sh /usr/local/bin && \
+    chmod 755 /usr/local/bin/bootloader_install.sh
diff --git a/tools/agptek_rocker/README b/tools/agptek_rocker/README
new file mode 100644
index 0000000000..6b627698e5
--- /dev/null
+++ b/tools/agptek_rocker/README
@@ -0,0 +1,46 @@
+Steps needed to patch update.upt with rockbox bootloader are explained in
+bootloader_install.sh shell script. Process is quite involved and some
+custom tools are needed.
+
+
+For convenience Dockerfile is provided which prepares custom image based
+on debian 9 which has all the tools needed to work with Agptek Rocker update
+images.
+
+Basically image extends standard debian image by:
+1) Installing developer packages from stock debian
+2) Cloning https://github.com/wodz/rockbox-wodz.git
+3) Building custom cross toolchain
+4) Cloning and installing tools to work with UBIFS
+
+You first need to build image with:
+docker build . -t "agptek-dev"
+
+Then you can start container and work with update.upt.
+If you want to generate patched update image in automatic way:
+docker run --rm -it -v /path/to/dir/with/update.upt:/upt \
+-e UPT_DIR=/upt agptek-dev bootloader_install.sh
+
+Patched update.upt with rockbox bootloader and rockbox.zip should end up in
+specified directory.
+
+If you want to play around, hack something etc. you can run container in
+interactive mode:
+docker run -it -v /path/to/dir/with/update.upt:/upt \
+-e UPT_DIR=/upt agptek-dev bash
+
+
+Files in this directory:
+README - this file
+bootloader_install.sh - shell script documenting process of patching
+                        agptek rocker update images
+
+update_update.py      - little helper utility to patch update.txt
+                        controll file
+
+hiby_player.sh        - shell script called on player boot which
+                        originally started music player application
+                        and now it starts bootloader
+
+Dockerfile            - file to build docker image with all needed
+                        tools to play with agptek rocker files
diff --git a/tools/agptek_rocker/bootloader_install.sh b/tools/agptek_rocker/bootloader_install.sh
new file mode 100644
index 0000000000..487b8870ea
--- /dev/null
+++ b/tools/agptek_rocker/bootloader_install.sh
@@ -0,0 +1,129 @@
+#!/bin/sh
+
+[ -z "$UPT_DIR" ] && UPT_DIR=`pwd` 
+cd $HOME
+
+# get sources
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 0: Get sources !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+[ -d "$HOME/rockbox-wodz" ] || git clone https://github.com/wodz/rockbox-wodz.git
+
+cd $HOME/rockbox-wodz
+
+# build bootloader
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 1: Build bootloader !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+
+[ -d "$HOME/rockbox-wodz/build" ] && rm -rf $HOME/rockbox-wodz/build
+git checkout agptek-rocker && \
+git pull && \
+mkdir $HOME/rockbox-wodz/build && cd $HOME/rockbox-wodz/build && \
+../tools/configure --target=240 --type=b && \
+make clean && \
+make && \
+cd $HOME
+
+# Extract update file (ISO9660 image) content
+# NOTE: Update process on device loop mount ISO image. Default behavior of mount
+#       is to map all names to lowercase. Because of this forcing lowercase
+#       mapping is needed when extracting
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 2: Extract upt file !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+[ -d "$HOME/iso" ] && rm -rf $HOME/iso
+mkdir $HOME/iso && \
+xorriso -osirrox on -ecma119_map lowercase -indev $UPT_DIR/update.upt -extract / $HOME/iso
+
+# Extract rootfs files. Preserve permissions (although this are wrong!)
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 3: Extract system.ubi !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+ubireader_extract_files -k -o $HOME/rootfs $HOME/iso/system.ubi
+
+# Copy rockbox bootloader
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 4: Copy bootloader !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+cp $HOME/rockbox-wodz/build/bootloader.elf $HOME/rootfs/usr/bin/rb_bootloader && \
+mipsel-rockbox-linux-gnu-strip --strip-unneeded $HOME/rootfs/usr/bin/rb_bootloader
+
+# Overwrite default player starting script with one running our bootloader
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 5: Modify startup script !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+cp $HOME/rockbox-wodz/tools/agptek_rocker//hiby_player.sh $HOME/rootfs/usr/bin/hiby_player.sh && \
+chmod 755 $HOME/rootfs/usr/bin/hiby_player.sh
+
+# Rebuild ubifs
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 6: Rebuild system.ubi !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+mkfs.ubifs --min-io-size=2048 --leb-size=126976 --max-leb-cnt=1024 -o $HOME/system_rb.ubi -r $HOME/rootfs && \
+mv $HOME/system_rb.ubi $HOME/iso/system.ubi
+
+# Fixup update.txt file with correct md5
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 7: Fixup update.txt !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+python $HOME/rockbox-wodz/tools/agptek_rocker/update_update.py $HOME/iso/update.txt
+
+# Rebuild .upt file
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 8: Rebuild upt file !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+xorriso -as mkisofs -volid 'CDROM' --norock -output $UPT_DIR/update_rb.upt $HOME/iso
+
+# Build rockbox.zip
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 9: Build rockbox application !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+cd $HOME/rockbox-wodz/build && \
+../tools/configure --target=240 --type=n && \
+make clean && \
+make && \
+make zip && \
+cp rockbox.zip $UPT_DIR/
+
+# Cleanup
+echo
+echo "!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!!! STEP 10: Cleanup !!!"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+rm -rf $HOME/rockbox-wodz/build
+rm -rf $HOME/iso
+rm -rf $HOME/rootfs
+
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo "!                  Building finished                               !"
+echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+echo
+echo "You should find update_rb.upt and rockbox.zip in output directory"
+echo
+echo "1) Unzip rockbox.zip file in the root directory of SD card"
+echo "2) Copy update_rb.upt to the root directory of SD card"
+echo "3) Rename update_rb.upt to update.upt in SD card"
+echo "4) Select update firmware on device"
+echo
diff --git a/tools/agptek_rocker/hiby_player.sh b/tools/agptek_rocker/hiby_player.sh
new file mode 100644
index 0000000000..e40e84c987
--- /dev/null
+++ b/tools/agptek_rocker/hiby_player.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+mount /dev/mmcblk0 /mnt/sd_0 &>/dev/null || \
+mount /dev/mmcblk0p1 /mnt/sd_0 &>/dev/null
+
+killall rb_bootloader &>/dev/null
+killall -9 rb_bootloader &>/dev/null
+
+/usr/bin/rb_bootloader
+sleep 1
diff --git a/tools/agptek_rocker/update_update.py b/tools/agptek_rocker/update_update.py
new file mode 100644
index 0000000000..4fb7056d19
--- /dev/null
+++ b/tools/agptek_rocker/update_update.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+import os
+import sys
+import hashlib
+import argparse
+from collections import OrderedDict
+
+EQ = '='
+BLK_START = '{'
+BLK_END = '}'
+
+#name: {key: value, key: value}
+def parse(filename):
+    blocks = OrderedDict()
+    blk = None
+    key = None
+    value = None
+
+    with open(filename) as f:
+        # read all lines
+        for line in f:
+            # if line has '=' sign treat it
+            # as split symbol
+            if EQ in line:
+                key, value = line.split(EQ, 1)
+                key = key.strip()
+                value = value.strip()
+
+                if value == BLK_START:
+                    # value on the right of '=' is '{'
+                    # so this opens new block
+                    blk = key
+                    blocks[key] = OrderedDict()
+
+                elif value == BLK_END:
+                    # value on the right of '=' is '}'
+                    # this terminates block
+                    blk = None
+
+                else:
+                    # key = value inside block
+                    blocks[blk][key] = value
+
+    # return parsed structure as dictionary
+    return blocks
+
+# write back internal representation into file
+def dump(tree, filename=None):
+    with open(filename, 'w') as f:
+        for blk in tree.keys():
+            f.write('\n%s={\n' % blk)
+            for key,value in tree[blk].items():
+                f.write('\t%s=%s\n' % (key,value))
+            f.write('}\n')
+
+if __name__=='__main__':
+    description = 'Update information in update.txt control file.'
+    usage = 'update_update.py filepath'
+
+    argp = argparse.ArgumentParser(usage=usage, description=description)
+    argp.add_argument('filepath', help='update.txt filepath to update contents of.')
+
+    if len(sys.argv) == 1:
+        argp.print_help()
+        sys.exit(1)
+
+    args = argp.parse_args()
+
+    # build config file representation
+    tree = parse(args.filepath)
+
+    dir = os.path.dirname(args.filepath)
+
+    # update all md5 sums
+    for blk in tree.keys():
+        filename = os.path.join(dir, os.path.basename(tree[blk]['file_path']))
+        with open(filename) as f:
+            tree[blk]['md5'] = hashlib.md5(f.read()).hexdigest()
+
+    # write back result
+    dump(tree, args.filepath)