Creating/obtaining drivers for a WiFi dongle on uCLinux

I am planning to use a Freescale Coldfire MCF5221x processor. Connected to this processor will be a WiFi dongle but i cannot find drivers to use with any WiFi dongle. How hard is it to create drivers for this use? Or does anyone know of a location that has some drivers for uCLinux? Any help with this matter would be greatly appreciated.