How to develop a wireless driver?

[fmm_07 at openmailbox.org]

Hello, I have a wireless card that does not work in FreeBSD but in
Gnu/Linux with a proprietary firmware (my wireless card is Realtek
RTL8188CE), the firmware is rtl8192cfw.bin.
My question is: How can I develop a free wireless driver and build it
with a custom kernel in FreeBSD?

Thanks for your help.