146 lines
4.8 KiB
Groff
146 lines
4.8 KiB
Groff
.\" Copyright (c) 1997, 1998, 1999
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.\" Bill Paul <wpaul@ee.columbia.edu>. 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 the following conditions
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.\" are met:
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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 Bill Paul.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``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 Bill Paul OR THE VOICES IN HIS HEAD
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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.\" THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 25, 1999
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.Dt AUE 4 i386
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.Os FreeBSD
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.Sh NAME
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.Nm aue
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.Nd
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ADMtek AN986 Pegasus USB Ethernet driver
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.Sh SYNOPSIS
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.Cd "device uhci0"
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.Cd "device ohci0"
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.Cd "device usb0"
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.Cd "device miibus0"
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.Cd "device aue0"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for USB ethernet adapters based on the ADMtek
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AN986 Pegasus chipset, including the LinkSys USB100TX, the Billionton
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Systems USB100, the Melco Inc. LU-ATX, the D-Link DSB-650TX and the
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SMC 2202USB.
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.Pp
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The Pegasus contains a 10/100
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ethernet MAC with MII interface and is designed to work with both
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ethernet and HomePNA transceivers. Although designed to interface with
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100Mbps peripherals, the existing USB standard specifies a maximum
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transfer speed of 12Mbps. Users should therefore not expect to actually
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achieve 100Mbps speeds with these devices.
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.Pp
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The Pegasus supports a 64-bit multicast hash table, single perfect
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filter entry for the station address and promiscuous mode. Packets are
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received and transmitted over separate USB bulk transfer endpoints.
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.Pp
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The
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.Nm
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driver supports the following media types:
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.Pp
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.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
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.It autoselect
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Enable autoselection of the media type and options.
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The user can manually override
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the autoselected mode by adding media options to the
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.Pa /etc/rc.conf
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file.
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.It 10baseT/UTP
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Set 10Mbps operation. The
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.Ar mediaopt
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option can also be used to enable
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.Ar full-duplex
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operation. Not specifying
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.Ar full duplex
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implies
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.Ar half-duplex
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mode.
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.It 100baseTX
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Set 100Mbps (fast ethernet) operation. The
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.Ar mediaopt
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option can also be used to enable
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.Ar full-duplex
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operation. Not specifying
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.Ar full duplex
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implies
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.Ar half-duplex
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mode.
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.El
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.Pp
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The
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.Nm
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driver supports the following media options:
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.Pp
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.Bl -tag -width xxxxxxxxxxxxxxxxxxxx
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.It full-duplex
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Force full duplex operation. The interface will operate in
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half duplex mode if this media option is not specified.
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.El
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.Pp
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For more information on configuring this device, see
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.Xr ifconfig 8 .
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "aue%d: watchdog timeout"
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A packet was queued for transmission and a transmit command was
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issued, however the device failed to acknowledge the transmission
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before a timeout expired.
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.It "aue%d: no memory for rx list"
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The driver failed to allocate an mbuf for the receiver ring.
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr netintro 4 ,
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.Xr ifconfig 8
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.Rs
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.%T ADMtek AN986 data sheet
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.%O http://www.admtek.com.tw
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.Re
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 4.0 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Bill Paul Aq wpaul@ee.columbia.edu .
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.Sh BUGS
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For some reason, outgoing bulk transfers (i.e. packet transmissions)
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fail if the transfer is exactly a multiple of 64 bytes in size. The
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.Nm
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driver works around this by padding such transfers up by one additional
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byte. This does not affect connectivity, however it does cause packets
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to occasionaly appear on the wire with one additional byte for no good
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reason. It is not known if this bug is due to a problem with Pegasus
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chip itself or some peculiarity of the underlying USB support.
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