I have never heard of drivers for a router. If you want to use the router to
make your Linux box wireless it needs to have a "client" mode, it turns the
router into a Wireless Access Point, once it is setup you setup your linux box
to connect to it (network card settings), connect the cable and it works.

My linux machine is setup that way, has been for over 2 years without any
problems (that I did not create myself).

I use a Buffalo WHRG54S as it has settings to be a client in it's firmware, I
just installed DD-WRT and set it up similar.

I checked the WRT310N manual, Username is Blank, Password is admin.