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.\" $DragonFly: src/share/man/man4/bwi.4,v 1.10 2008/07/26 16:25:40 swildner Exp $
.\"
.Dd July 26, 2008
.Dt BWI 4
.Os
.Sh NAME
.Nm bwi
.Nd Broadcom BCM430x/4318 IEEE 802.11b/g wireless network driver
.Sh SYNOPSIS
To load the driver as a module at boot time, place the
following line in
.Pa /boot/loader.conf :
.Bd -literal -offset indent
if_bwi_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for Broadcom BCM430x/4318 wireless network adapters.
For more information on configuring this device, see
.Xr ifconfig 8 .
.Ss MIB Variables
The following per-interface variables are implemented in the
.Va hw.bwi Ns Em X
branch of the
.Xr sysctl 3
MIB.
.Bl -tag -width ".Va txpwr_calib"
.It Va debug
Debug flags.
.It Va dwell_time
Channel dwell time during scan (msec).
.It Va fw_version
Firmware version.
.It Va led_idle
Number of ticks before LED enters idle state.
.It Va led_blink
Allow LED to blink.
.It Va txpwr_calib
Enable software TX power calibration.
.El
.Sh HARDWARE
The following cards are among those supported by the
.Nm
driver:
.Pp
.Bl -column -compact "Buffalo WLI-PCI-G54S" "BCM4318" "CardBus" "b/g" -offset 6n
.It Em Card Ta Em Chip Ta Em Bus Ta Em Standard
.It "Linksys WPC54Gv3" Ta BCM4318 Ta CardBus Ta b/g
.It "Linksys WPC54GSv2" Ta BCM4318 Ta CardBus Ta b/g
.It "Buffalo WLI-CB-G54S" Ta BCM4318 Ta CardBus Ta b/g
.It "Buffalo WLI-PCI-G54S" Ta BCM4306 Ta PCI Ta b/g
.It "Dell Wireless 1470" Ta BCM4318 Ta Mini PCI Ta b/g
.It "Dell Truemobile 1400" Ta BCM4309 Ta Mini PCI Ta b/g
.El
.Sh FILES
The firmware for the adapter is not shipped with
.Dx
and must be obtained separately.
An archive with firmware files that are known to work can be found at:
.Bd -literal -offset indent
http://leaf.dragonflybsd.org/~sephe/bwi/v3.tbz
.Ed
.Pp
The firmware files have to reside in
.Pa /etc/firmware/bwi
and will be loaded when the interface is brought up.
.Sh EXAMPLES
Refer to the
.Sx EXAMPLES
section of
.Xr wlan 4 .
.Sh SEE ALSO
.Xr arp 4 ,
.Xr cardbus 4 ,
.Xr ifmedia 4 ,
.Xr pci 4 ,
.Xr wlan 4 ,
.Xr wlan_ratectl 4 ,
.Xr ifconfig 8 ,
.Xr wpa_supplicant 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Dx 1.11 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Sepherosa Ziehau .
.Pp
The hardware specification was reverse engineered by the people at
.Pa http://bcm-specs.sipsolutions.net .
Thanks go also to johill and mb on the #bcm-specs channel.
.Sh BUGS
BCM4306 and BCM4309 chips do not work properly on channel 1, 2 and 3.