Mario and Erika,
You can start with the drivers from StarterWare for Ethernet and then adapt them to work with the NDK. The following forum post has some suggestions:
http://e2e.ti.com/support/embedded/tirtos/f/355/p/184896/902649.aspx
I would scroll down to the May 2012 answer which is a more up to date set of activities to enable this capability.
