.\" $NetBSD: bwi.4,v 1.13 2014/03/18 18:20:39 riastradh Exp $
.\"
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.\" $DragonFly: src/share/man/man4/bwi.4,v 1.10 2008/07/26 16:25:40 swildner Exp $
.\"
.Dd April 25, 2012
.Dt BWI 4
.Os
.Sh NAME
.Nm bwi
.Nd Broadcom BCM430x/4318 IEEE 802.11b/g wireless network driver
.Sh SYNOPSIS
.Cd "bwi* at pci? dev ? function ?"
.Cd "bwi* at cardbus? function ?"
.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 -offset 6n -compact "Apple AirPort Extreme" "BCM4318" "Mini PCI" "b/g"
.It Em "Card	Chip	Bus	Standard"
.It Buffalo WLI-CB-G54	BCM4306	CardBus	b/g
.It Buffalo WLI3-CB-G54L	BCM4318	CardBus	b/g
.It Buffalo WLI-PCI-G54S	BCM4306	PCI	b/g
.It Dell Wireless 1370	BCM4318	Mini PCI	b/g
.It Dell Wireless 1470	BCM4318	Mini PCI	b/g
.It Dell Truemobile 1400	BCM4309	Mini PCI	b/g
.It Dell Latitude D505	BCM4306	PCI	b/g
.It Apple AirPort Extreme			b/g
.El
.Sh FILES
The firmware for the adapter is not shipped with
.Nx
and must be obtained separately.
An archive with firmware files that are known to work can be found at:
.Bd -literal -offset indent
.Lk http://leaf.dragonflybsd.org/~sephe/bwi/v3.tbz
.Ed
.Pp
The firmware files conventionally reside in
.Pa /libdata/firmware/bwi
and will be loaded when the interface is brought up.
.Em Note :
the v3 subdirectory in the above firmware archive should exist
in the firmware folder.
The full list of paths checked for firmware can be found in the
.Va hw.firmware.path
.Xr sysctl 3
node.
.Sh SEE ALSO
.Xr arp 4 ,
.Xr cardbus 4 ,
.Xr ifmedia 4 ,
.Xr pci 4 ,
.Xr ifconfig 8 ,
.Xr sysctl 8 ,
.Xr wiconfig 8 ,
.Xr wpa_supplicant 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx 6.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Sepherosa Ziehau
for Dragonfly BSD.
It was ported to
.Nx
by
.An Taylor R. Campbell Aq Mt riastradh@NetBSD.org .
.Pp
The hardware specification was reverse engineered by the people at
.Lk 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.