beginner develop broadcom 4360

[Kleber Povoacao]

Hi,

I'm reading documentation about FreeBSD kernel because I want to develop/port only one thing: Broadcom 4360 wireless driver.
Someone could mentor me the right direction to achieve such thing ?
I'm not sure how deep should I go in the kernel or which pieces should I really understand to achieve the goal. 
I never developed anything to any kernel, but I have good understanding of C and some Assembly.