1 .\" Copyright (c) 1997, 1998
2 .\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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31 .\" $FreeBSD: src/share/man/man4/wb.4,v 1.10.2.5 2003/02/17 21:20:39 trhodes Exp $
38 .Nd Winbond W89C840F fast ethernet device driver
45 driver provides support for PCI ethernet adapters and embedded
46 controllers based on the Winbond W89C840F fast ethernet controller
48 This includes the Trendware TE100-PCIE and various other cheap
50 The 840F should not be confused with the 940F, which is
51 an NE2000 clone and only supports 10Mbps speeds.
53 The Winbond controller uses bus master DMA and is designed to be
54 a DEC 'tulip' workalike.
55 It differs from the standard DEC design
56 in several ways: the control and status registers are spaced 4
57 bytes apart instead of 8, and the receive filter is programmed through
58 registers rather than by downloading a special setup frame via
59 the transmit DMA engine.
60 Using an external PHY, the Winbond chip
61 supports both 10 and 100Mbps speeds in either full or half duplex.
65 driver supports the following media types:
67 .Bl -tag -width xxxxxxxxxxxxxxxxxxxx
69 Enable autoselection of the media type and options.
71 supported if the PHY chip attached to the Winbond controller
72 supports NWAY autonegotiation.
73 The user can manually override
74 the autoselected mode by adding media options to the
81 option can also be used to select either
87 Set 100Mbps (fast ethernet) operation.
90 option can also be used to select either
99 driver supports the following media options:
101 .Bl -tag -width xxxxxxxxxxxxxxxxxxxx
103 Force full duplex operation
105 Force half duplex operation.
108 Note that the 100baseTX media type is only available if supported
110 For more information on configuring this device, see
114 .It "wb%d: couldn't map memory"
115 A fatal initialization error has occurred.
116 .It "wb%d: couldn't map interrupt"
117 A fatal initialization error has occurred.
118 .It "wb%d: watchdog timeout"
119 The device has stopped responding to the network, or there is a problem with
120 the network connection (cable).
121 .It "wb%d: no memory for rx list"
122 The driver failed to allocate an mbuf for the receiver ring.
123 .It "wb%d: no memory for tx list"
124 The driver failed to allocate an mbuf for the transmitter ring when
125 allocating a pad buffer or collapsing an mbuf chain into a cluster.
126 .It "wb%d: chip is in D3 power state -- setting to D0"
127 This message applies only to adapters which support power
129 Some operating systems place the controller in low power
130 mode when shutting down, and some PCI BIOSes fail to bring the chip
131 out of this state before configuring it.
132 The controller loses all of
133 its PCI configuration in the D3 state, so if the BIOS does not set
134 it back to full power mode in time, it won't be able to configure it
136 The driver tries to detect this condition and bring
137 the adapter back to the D0 (full power) state, but this may not be
138 enough to return the driver to a fully operational condition.
140 you see this message at boot time and the driver fails to attach
141 the device as a network interface, you will have to perform second
142 warm boot to have the device properly configured.
144 Note that this condition only occurs when warm booting from another
146 If you power down your system prior to booting
148 the card should be configured correctly.
159 device driver first appeared in
164 driver was written by
165 .An Bill Paul Aq wpaul@ctr.columbia.edu .
167 The Winbond chip seems to behave strangely in some cases when the
168 link partner switches modes.
169 If for example both sides are set to
170 10Mbps half-duplex, and the other end is changed to 100Mbps
171 full-duplex, the Winbond's receiver suddenly starts writing trash
172 all over the RX descriptors.
175 driver handles this by forcing a reset of both the controller
176 chip and attached PHY.
177 This is drastic, but it appears to be the
178 only way to recover properly from this condition.