Please assist

I am looking to make my system a completely Linux laptop;
it’s an HP Pavilion dv9912nr notebook PC however under Linux a number of problems exist: the wireless won’t pic up a signal and the Quick Play buttons(volume control start/pause,stop, etc.)the wireless is a
Broadcom 4321AG 802.11a/b/g/draft-n Wi-Fi adapter
please help

You may get some clues here:
HCL/Laptops/HP - openSUSE

Getting Your Wireless to Work - openSUSE Forums