ar9170.fw
ar9170.fw is the GPL firmware for the Atheros 802.11n USB chipset (AR9170).
See also ar9170 – the respective upstream driver.
Get the source
You can get the source code from:
http://git.sipsolutions.net/ar9170-fw.git
Toolchain
You will need an SH2 toolchain, you can download the GNU GCC toolchain, gnush from KPIT:
http://www.kpitgnutools.com/index.php
Build and install
make sudo make install