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Add a manpage for the cnw(4) driver, adopted from NetBSD.
MFC after: 5 days
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Christian Brueffer
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=135017
130
share/man/man4/cnw.4
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share/man/man4/cnw.4
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.\" $NetBSD: cnw.4,v 1.12 2001/09/12 18:19:17 wiz Exp $
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.\"
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.\" Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that this notice is retained,
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.\" the conditions in the following notices are met, and terms applying
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.\" to contributors in the following notices also apply to Berkeley
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.\" Software Design, Inc.
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by
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.\" Berkeley Software Design, Inc.
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.\" 4. Neither the name of the Berkeley Software Design, Inc. nor the names
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.\" of its contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN, INC. BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" PAO2 Id: cnw.4,v 1.1.1.1 1997/12/11 14:46:23 itojun Exp
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 5, 2004
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.Dt CNW 4
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.Os
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.Sh NAME
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.Nm cnw
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.Nd Netwave AirSurfer wireless network driver
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.Sh SYNOPSIS
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.Cd "device cnw"
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.Sh DESCRIPTION
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The
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.Nm cnw
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interface provides access to a theoretical 1 Mb/s wireless Ethernet network
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based on the Netwave AirSurfer Wireless LAN (formerly known as the Xircom
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Netwave Wireless LAN).
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.Pp
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Note that the driver does not support newer devices
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such as the Netwave AirSurfer
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.Dq Plus ,
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or the BayStack 650/660.
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These devices are supported by the
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.Xr awi 4
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driver.
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.Pp
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Netwave devices are not compatible with IEEE 802.11 wireless networks.
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Also note that there are Netwave devices with different wireless frequency,
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depending on the radio band plan in each country.
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.Pp
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The card uses 36K of I/O memory mapped to the card.
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.\"The card uses 32K of I/O memory mapped to the card along with either 16 I/O ports
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.\"or 4K of additional I/O memory for access to command registers.
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.\"The driver currently only supports the use of the additional 4K of I/O memory.
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You may need to increase memory space available to the PC Card controller.
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See
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.Xr pccard 4
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for details.
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.Pp
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In use, the cards appear to achieve up to a 420Kb/s transfer rate, though
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a transfer rate between 250Kb/s and 350Kb/s is typical.
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.Pp
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The card operates in the 2.4GHz frequency range and is subject to interference
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from microwaves, IEEE 802.11 wireless network devices, as well as earth.
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For example, it seems that IEEE 802.11 channel 14 conflicts with Netwave
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.Pq US frequency .
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They interfere with each other if they are both operated
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in the same geographic region, causing weird packet loss.
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You may be able to avoid the interference with IEEE 802.11 devices,
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by changing the IEEE 802.11 channel.
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.Sh HARDWARE
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Cards supported by the
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.Nm
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driver include:
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.Pp
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.Bl -bullet -compact
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.It
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Xircom CreditCard Netwave
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.It
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NetWave AirSurfer
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "cnw0: can't map memory"
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Indicates that the driver was not able to allocate enough PC Card bus
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address space into which to map the device.
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See
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.Xr pccard 4
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and increase memory available to the PC Card controller.
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr awi 4 ,
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.Xr inet 4 ,
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.Xr intro 4 ,
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.Xr pccard 4
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.Sh HISTORY
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The
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.Nm
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driver was ported from
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.Nx
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by
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.An -nosplit
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.An Hiroyuki Aizu Aq aizu@jaist.ac.jp .
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It first appeared in
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.Nx 1.4 .
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The first
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.Fx
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release to include it was
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.Fx 5.0 .
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This manual page was adopted from
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.Nx
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by
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.An Christian Brueffer Aq brueffer@FreeBSD.org .
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