BWN(4)							   BSD Kernel Interfaces Manual 						    BWN(4)

NAME

     bwn -- Broadcom BCM43xx IEEE 802.11b/g wireless network driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device siba_bwn
	   device bwn
	   device wlan
	   device wlan_amrr
	   device firmware

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   if_bwn_load="YES"

DESCRIPTION

     The bwn driver provides support for Broadcom BCM43xx based PCI/CardBus network adapters.

     It supports station and monitor mode operation.  Only one virtual interface may be configured at any time.  For more information on configur-
     ing this device, see ifconfig(8).

     This driver requires firmware to be loaded before it will work.  The ports/net/bwn-firmware-kmod port needs to be installed before
     ifconfig(8) will work.  Most cases you need to use bwn_v4_ucode module but if you are a LP (low power) PHY user please uses bwn_v4_lp_ucode
     module.

HARDWARE

     The bwn driver supports Broadcom BCM43xx based wireless devices, including:

     Card		      Chip	 Bus	     Standard
     Apple Airport Extreme    BCM4318	 PCI	     b/g
     ASUS WL-138g	      BCM4318	 PCI	     b/g
     Buffalo WLI-CB-G54S      BCM4318	 CardBus     b/g
     Dell Wireless 1390       BCM4311	 Mini PCI    b/g
     Dell Wireless 1470       BCM4318	 Mini PCI    b/g
     Dell Truemobile 1400     BCM4309	 Mini PCI    b/g
     HP Compaq 6715b	      BCM4312	 PCI	     b/g
     HP nx6125		      BCM4319	 PCI	     b/g
     Linksys WPC54G Ver 3     BCM4318	 CardBus     b/g
     Linksys WPC54GS Ver 2    BCM4318	 CardBus     b/g
     US Robotics 5411	      BCM4318	 CardBus     b/g

     Users of older Broadcom chipsets (BCM4301, BCM4303 and BCM4306 rev 2) must use bwi(4) because the v4 version of the firmware does not support
     these chips.  The newer firmware is too big to fit into these old chips.

EXAMPLES

     Join an existing BSS network (i.e., connect to an access point):

	   ifconfig wlan create wlandev bwn0 inet 192.168.0.20 
	       netmask 0xffffff00

     Join a specific BSS network with network name ``my_net'':

	   ifconfig wlan create wlandev bwn0 ssid my_net up

     Join a specific BSS network with 64-bit WEP encryption:

	   ifconfig wlan create wlandev bwn0 ssid my_net 
		   wepmode on wepkey 0x1234567890 weptxkey 1 up

LOADER TUNABLES

     Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

     hw.bwn.msi_disable
	     This tunable disables MSI support on the hardware.  The default value is 0.

     hw.bwn.usedma
	     This tunable enables DMA operations on the hardware.  If the value is 0, PIO mode would be used.  The default value is 1.

SEE ALSO

     arp(4), bwi(4), cardbus(4), intro(4), pci(4), wlan(4), wlan_amrr(4), ifconfig(8), wpa_supplicant(8)

HISTORY

     The bwn driver first appeared in FreeBSD 8.1.

AUTHORS

     The bwn driver was written by Weongyo Jeong <weongyo@FreeBSD.org>.

CAVEATS

     Some LP PHY devices have DMA operation problems that in that case try to use PIO mode.

BSD
								 February 15, 2011							       BSD