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+.\"	$OpenBSD: tl.4,v 1.22 2013/07/16 16:05:49 schwarze Exp $
+.\"
+.\" Copyright (c) 1997, 1998
+.\"	Bill Paul <wpaul@ctr.columbia.edu>. 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.
+.\"
+.\"	$Id: tl.4,v 1.22 2013/07/16 16:05:49 schwarze Exp $
+.\"
+.Dd $Mdocdate: July 16 2013 $
+.Dt TL 4
+.Os
+.Sh NAME
+.Nm tl
+.Nd Texas Instruments ThunderLAN 10/100 Ethernet device
+.Sh SYNOPSIS
+.Cd "tl* at pci?"
+.Cd "lxtphy* at mii?"
+.Cd "mlphy* at mii?"
+.Cd "nsphy* at mii?"
+.Cd "tlphy* at mii?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for PCI Ethernet adapters based on the Texas
+Instruments ThunderLAN Ethernet controller chip.
+This includes a large number of Compaq PCI-bus Ethernet adapters as well as
+the integrated Ethernet controllers built in to several models
+of Compaq Prosignia servers and Compaq Deskpro desktop machines.
+This driver also supports the Olicom OC-2135/2138, OC-2325 and OC-2326
+10/100 TX UTP adapters and the Racore 8165 10/100baseTX and 8148
+10baseT/100baseTX/100baseFX multi-personality cards.
+.Pp
+The ThunderLAN controller has a standard MII interface that supports
+up to 32 physical interface devices (PHYs).
+It also has a built-in 10baseT PHY hardwired at MII address 31, which may be
+used in some 10Mbps-only hardware configurations.
+In 100Mbps configurations, a National Semiconductor DP83840A or other
+MII-compliant PHY may be attached to the ThunderLAN's MII bus.
+If a DP83840A or equivalent is available, the ThunderLAN chip can operate
+at either 100Mbps or 10Mbps in either half-duplex or full-duplex modes.
+The ThunderLAN's built-in PHY and the DP83840A also support autonegotiation.
+.Pp
+The
+.Nm
+driver supports the following media types:
+.Bl -tag -width full-duplex
+.It autoselect
+Enable autoselection of the media type and options.
+Note that this option is only available on those PHYs that support
+autonegotiation.
+Also, the PHY will not advertise those modes that have been explicitly
+disabled using the following media options.
+.It 10baseT
+Set 10Mbps operation.
+.It 100baseTX
+Set 100Mbps (Fast Ethernet) operation.
+.It 10base5
+Enable AUI/BNC interface (useful only with the built-in PHY).
+.El
+.Pp
+The
+.Nm
+driver supports the following media options:
+.Bl -tag -width full-duplex
+.It full-duplex
+Force full duplex operation.
+.It half-duplex
+Force half duplex operation.
+.It hw-loopback
+Enable hardware loopback mode.
+.El
+.Pp
+Note that the 100baseTX media type is only available if supported
+by the PHY.
+For more information on configuring this device, see
+.Xr ifconfig 8 .
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "tl0: couldn't map memory"
+A fatal initialization error has occurred.
+.It "tl0: couldn't map interrupt"
+A fatal initialization error has occurred.
+.It "tl0: device timeout"
+The device has stopped responding to the network, or there is a problem with
+the network connection (cable).
+.It "tl0: no memory for rx list"
+The driver failed to allocate an mbuf for the receiver ring.
+.It "tl0: no memory for tx list"
+The driver failed to allocate an mbuf for the transmitter ring when
+allocating a pad buffer or collapsing an mbuf chain into a cluster.
+.El
+.Sh SEE ALSO
+.Xr arp 4 ,
+.Xr ifmedia 4 ,
+.Xr intro 4 ,
+.Xr lxtphy 4 ,
+.Xr mlphy 4 ,
+.Xr netintro 4 ,
+.Xr nsphy 4 ,
+.Xr pci 4 ,
+.Xr tlphy 4 ,
+.Xr hostname.if 5 ,
+.Xr ifconfig 8
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 2.2 .
+.Ox
+support first appeared in
+.Ox 2.4 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An Bill Paul Aq Mt wpaul@ctr.columbia.edu .