tomato:/home/thomas/bin# ./dfu-util -a u-boot -R -D ../gta02v2/uboot-31jan.bin
dfu-util - (C) 2007 by OpenMoko Inc.
This program is Free Software and has ABSOLUTELY NO WARRANTY
Opening USB Device 0x0000:0x0000...
Claiming USB DFU Runtime Interface...
Determining device status: state = appIDLE, status = 0
Device really in Runtime Mode, send DFU detach request...
Resetting USB...
Opening USB Device...
Found Runtime: [0x1457:0x5119] devnum=51, cfg=0, intf=0, alt=1, name="u-boot"
Claiming USB DFU Interface...
Setting Alternate Setting ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
Transfer Size = 0x1000
bytes_per_hash=3568
Starting download: [##################################################] finished!
state(2) = dfuIDLE, status(0) = No error condition is present
Done!
Resetting USB to switch back to runtime mode
tomato:/home/thomas/bin#