SDIO driver for WIFI

Hello all

Iam working on SDIO WIFI cards and trying to bring up this card on
this board. Is there any requirement of bus driver needed for this
device. Iam using Atheros card what are the modules required to be
loaded to bring this card up on Beagles Board(OMAP 3530) and most
specifically please let me known about the BUS driver weather it is
required or not.