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