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+.\"-
+.\" Copyright (c) 2021 Felix Johnson <felix.the.red@gmail.com>
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 19, 2021
+.Dt ARSWITCH 4
+.Os
+.Sh NAME
+.Nm arswitch
+.Nd driver for Atheros Fast Ethernet switch
+.Sh SYNOPSIS
+.Cd "device mdio"
+.Cd "device etherswitch"
+.Cd "device arswitch"
+.Sh DESCRIPTION
+The
+.Nm
+device driver provides a management interface to multiple Atheros
+fast ethernet switch chips:
+.Bl -tag -compact -width "AR7240"
+.It AR7240
+Wireless Network Processor SOC with five Fast Ethernet PHYs
+.It AR8216
+Fast Ethernet Switch
+.It AR8226
+.It AR8316
+Six-port Gigabit Ethernet Switch
+.It AR8327
+Seven-port Gigabit Ethernet Switch
+.It AR9340
+Wireless networking SoC
+.El
+.Pp
+The driver uses an
+.Xr mdio 4
+or
+.Xr miibus 4
+interface to configure the ethernet interface.
+.Pp
+This driver supports port based vlan, and
+IEEE 802.1Q (QinQ).
+These options can be configured with the
+.Xr etherswitchcfg 8
+command.
+.Nm
+supports
+.Dv addtag ,
+.Dv striptag ,
+and
+.Dv doubletag .
+.Dv addtag
+and
+.Dv striptag
+are mutually exclusive.
+.Pp
+Setting the switch MAC address is not supported.
+.Sh SEE ALSO
+.Xr etherswitch 4 ,
+.Xr etherswitchcfg 8
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 12.0 .
+.Sh AUTHORS
+The
+.Nm
+manual was written by
+.An Felix Johnson .