162 lines
5.9 KiB
Groff
162 lines
5.9 KiB
Groff
.\" Copyright (c) 1997, 1998
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.\" Bill Paul <wpaul@ctr.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 November 4, 1998
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.Dt WB 4
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.Os FreeBSD
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.Sh NAME
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.Nm wb
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.Nd
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Winbond W89C840F fast ethernet device driver
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.Sh SYNOPSIS
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.Cd "device miibus"
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.Cd "device wb"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for PCI ethernet adapters and embedded
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controllers based on the Winbond W89C840F fast ethernet controller
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chip. This includes the Trendware TE100-PCIE and various other cheap
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boards. The 840F should not be confused with the 940F, which is
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an NE2000 clone and only supports 10Mbps speeds.
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.Pp
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The Winbond controller uses bus master DMA and is designed to be
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a DEC 'tulip' workalike. It differs from the standard DEC design
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in several ways: the control and status registers are spaced 4
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bytes apart instead of 8, and the receive filter is programmed through
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registers rather than by downloading a special setup frame via
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the transmit DMA engine. Using an external PHY, the Winbond chip
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supports both 10 and 100Mbps speeds in either full or half duplex.
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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. This is only
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supported if the PHY chip attached to the Winbond controller
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supports NWAY autonegotiation. 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 select either
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.Ar full-duplex
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or
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.Ar half-duplex modes.
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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 select either
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.Ar full-duplex
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or
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.Ar half-duplex
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modes.
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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
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.It half-duplex
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Force half duplex operation.
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.El
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.Pp
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Note that the 100baseTX media type is only available if supported
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by the adapter.
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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 "wb%d: couldn't map memory"
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A fatal initialization error has occurred.
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.It "wb%d: couldn't map interrupt"
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A fatal initialization error has occurred.
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.It "wb%d: watchdog timeout"
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The device has stopped responding to the network, or there is a problem with
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the network connection (cable).
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.It "wb%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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.It "wb%d: no memory for tx list"
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The driver failed to allocate an mbuf for the transmitter ring when
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allocating a pad buffer or collapsing an mbuf chain into a cluster.
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.It "wb%d: chip is in D3 power state -- setting to D0"
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This message applies only to adapters which support power
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management. Some operating systems place the controller in low power
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mode when shutting down, and some PCI BIOSes fail to bring the chip
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out of this state before configuring it. The controller loses all of
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its PCI configuration in the D3 state, so if the BIOS does not set
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it back to full power mode in time, it won't be able to configure it
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correctly. The driver tries to detect this condition and bring
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the adapter back to the D0 (full power) state, but this may not be
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enough to return the driver to a fully operational condition. If
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you see this message at boot time and the driver fails to attach
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the device as a network interface, you will have to perform second
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warm boot to have the device properly configured.
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.Pp
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Note that this condition only occurs when warm booting from another
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operating system. If you power down your system prior to booting
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.Fx ,
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the card should be configured correctly.
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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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.Xr ng_ether 8
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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 3.0 .
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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@ctr.columbia.edu .
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.Sh BUGS
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The Winbond chip seems to behave strangely in some cases when the
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link partner switches modes. If for example both sides are set to
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10Mbps half-duplex, and the other end is changed to 100Mbps
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full-duplex, the Winbond's receiver suddenly starts writing trash
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all over the RX descriptors. The
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.Nm
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driver handles this by forcing a reset of both the controller
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chip and attached PHY. This is drastic, but it appears to be the
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only way to recover properly from this condition.
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