Help needed: How to develop a Network adapter driver?

Hi All,

I´m using QNX 4.25C in an in-house embedded application for the Venezuelan
Oil Industry. This application involves a QNX based TCP/IP data acquisition
unit for oil wells (RTU). I´d like to integrate an IEEE802.11 Wireless LAN
PCMCIA card. As far as I know, there are no QNX drivers for such adapters.
However I´ve got the source code of the Linux driver for the card I´m
planning to use, so I´d like to port the driver from Linux to QNX. Could you
please send me either some gudelines on how to write a network driver or the
source code of any existing ethernet adapter or some other information which
could help?
Thank You in advance.
Gaston Mora S.