Current Supported: jz2440v2 board
1. install depend
$ sudo apt-get install libusb-dev
2. build source
$ make
3. configure udev rules
//$ sudo cp -fp 51-dnw.rules /etc/udev/rules.d/
//$ sudo service udev restart
$ sudo make install
4. unplug usb and plug it in again
5. run dnw
$ ./dnw -f u-boot.bin