This is about creating a handset for the LOGICDATA height-adjustable desk controller DFU: http://thefekete.blogspot.com/2014/10/xmega-dfu-programming-in-linux.html
toolchain: http://www.microchip.com/avr-support/avr-and-arm-toolchains-(c-compilers)
ASF: http://www.microchip.com/avr-support/advanced-software-framework-(asf)