[ 5577.057130] usb 1-2.2: new full-speed USB device number 4 using ehci-pci
[ 5577.133868] usb 1-2.2: New USB device found, idVendor=03eb, idProduct=2ff1
[ 5577.133876] usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 5577.133882] usb 1-2.2: Product: AT32UC3A DFU
[ 5577.133888] usb 1-2.2: Manufacturer: ATMEL
[ 5577.133893] usb 1-2.2: SerialNumber: 1.0.3(Firmware upgrade

Most of important information for running of module is available in this original document: AW_readme.txt. I describe only shortly how I made firmware upgrade under Linux:

I downloaded modified dfu-programmer from this page: https://code.google.com/p/sdr-widget/downloads/list
I installed package avr-binutils or binutils-avr according to Linux distribution.
I created this scr ipt according to manual: program-widget.
In /etc/udev/rules.d/ I created file 99-avrtools.rules according to manual. In my case was important this section:)