francois@francois:~$ dmesg | grep bcm
[ 18.464000] bcm43xx driver
[ 23.714000] sdb:<3>bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 29.115000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 51.993000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 74.812000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 97.338000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 120.020000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 142.886000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 165.741000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 288.730000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 411.535000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 534.344000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 656.994000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 779.714000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 902.357000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 1025.010000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 1147.633000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 1270.199000] bcm43xx: Firmware: no support for microcode extracted from version 4.x binary drivers.
[ 1539.444000] bcm43xx driver