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#