The binary firmwares are downloaded from http://ftp.debian.org/debian/pool/non-free/f/firmware-nonfree.

Copyright (c) 2007-2009 Broadcom Corporation

This file contains firmware data derived from proprietary unpublished
source code, Copyright (c) 2007-2009 Broadcom Corporation.

Permission is hereby granted for the distribution of this firmware data
in hexadecimal or equivalent format, provided this copyright notice is
accompanying it.

