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.