The firmware for the adapter is not shipped with
NetBSD and must be obtained separately. An archive with firmware files that are known to work can be found at:
http://leaf.dragonflybsd.org/~sephe/bwi/v3.tbz
The firmware files conventionally reside in
/libdata/firmware/bwi and will be loaded when the interface is brought up.
Note: the v3 subdirectory in the above firmware archive should exist in the firmware folder. The full list of paths checked for firmware can be found in the
hw.firmware.path sysctl(3) node.