export FIRMWARE_INSTALL_DIR="/lib/firmware"
wget http://downloads.openwrt.org/sources/broadcom-wl-4.80.53.0.tar.bz2
tar xjf broadcom-wl-4.80.53.0.tar.bz2
cd broadcom-wl-4.80.53.0/kmod
sudo b43-fwcutter -w "$FIRMWARE_INSTALL_DIR" wl_apsta.o
sudo modprobe -r b43
sudo modprobe b43