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+.\" Copyright (c) 1997, 1998, 1999, 2000-2003
+.\"	Bill Paul <wpaul@windriver.com>. All rights reserved.
+.\"
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by Bill Paul.
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"   without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
+.\" 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 April 20, 2003
+.Dt AXE 4
+.Os
+.Sh NAME
+.Nm axe
+.Nd ASIX Electronics AX88172 USB Ethernet driver
+.Sh SYNOPSIS
+.Cd "device ehci"
+.Cd "device uhci"
+.Cd "device ohci"
+.Cd "device usb"
+.Cd "device miibus"
+.Cd "device axe"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for USB ethernet adapters based on the ASIX
+Electronics AX88172 USB 2.0 chipset, including the LinkSys USB200M.
+.Pp
+The AX88172 is a USB 2.0 device which  contains a 10/100
+ethernet MAC with MII interface and is designed to work with both
+ethernet and HomePNA transceivers. The AX88172 will operate with
+both USB 1.x and USB 2.0 controllers, however performace with 1.x
+contollers will be limited since the USB 1.x standard specifies a
+maximum transfer speed of 12Mbps. 
+Users with USB 1.x controllers should therefore not expect to actually
+achieve 100Mbps speeds with these devices.
+.Pp
+The AX88172 supports a 64-bit multicast hash table, single perfect
+filter entry for the station address, all-multicast mode and promiscuous mode.
+Packets are
+received and transmitted over separate USB bulk transfer endpoints.
+.Pp
+The
+.Nm
+driver supports the following media types:
+.Pp
+.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
+.It autoselect
+Enable autoselection of the media type and options.
+The user can manually override
+the autoselected mode by adding media options to the
+.Pa /etc/rc.conf
+file.
+.It 10baseT/UTP
+Set 10Mbps operation.
+The
+.Ar mediaopt
+option can also be used to enable
+.Ar full-duplex
+operation.
+Not specifying
+.Ar full duplex
+implies
+.Ar half-duplex
+mode.
+.It 100baseTX
+Set 100Mbps (fast ethernet) operation.
+The
+.Ar mediaopt
+option can also be used to enable
+.Ar full-duplex
+operation.
+Not specifying
+.Ar full duplex
+implies
+.Ar half-duplex
+mode.
+.El
+.Pp
+The
+.Nm
+driver supports the following media options:
+.Pp
+.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
+.It full-duplex
+Force full duplex operation.
+The interface will operate in
+half duplex mode if this media option is not specified.
+.El
+.Pp
+For more information on configuring this device, see
+.Xr ifconfig 8 .
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "axe%d: watchdog timeout"
+A packet was queued for transmission and a transmit command was
+issued, however the device failed to acknowledge the transmission
+before a timeout expired.
+.It "axe%d: no memory for rx list"
+The driver failed to allocate an mbuf for the receiver ring.
+.El
+.Sh SEE ALSO
+.Xr arp 4 ,
+.Xr miibus 4 ,
+.Xr netintro 4 ,
+.Xr ng_ether 4 ,
+.Xr ifconfig 8
+.Rs
+.%T ASIX AX88172 data sheet
+.%O http://www.asix.com.tw
+.Re
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 5.0 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An Bill Paul Aq wpaul@windriver.com .