This NIC is an AR5424. There is a long thread on tech@ that began in 2010 and ended in 2013. To my understanding, only certain versions of this card work, and only if a user-developed patch (which breaks other things) is applied.
The discussion is very long, and the earliest posts in the thread began here:
http://marc.info/?t=126437919200002&r=3&w=2