NAME

       wb — Winbond W89C840F Fast Ethernet device driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device miibus
             device wb

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             if_wb_load="YES"

DESCRIPTION

       The  wb  driver  provides support for PCI Ethernet adapters and embedded controllers based on the Winbond
       W89C840F Fast Ethernet controller chip.  The 840F should not be confused  with  the  940F,  which  is  an
       NE2000 clone and only supports 10Mbps speeds.

       The  Winbond  controller  uses  bus master DMA and is designed to be a DEC 'tulip' workalike.  It differs
       from the standard DEC design in several ways: the control and status registers are spaced 4  bytes  apart
       instead of 8, and the receive filter is programmed through registers rather than by downloading a special
       setup  frame  via  the transmit DMA engine.  Using an external PHY, the Winbond chip supports both 10 and
       100Mbps speeds in either full or half duplex.

       The wb driver supports the following media types:

       autoselect            Enable autoselection of the media type and options.  This is only supported if  the
                             PHY  chip  attached  to  the Winbond controller supports NWAY autonegotiation.  The
                             user can manually override the autoselected mode by adding  media  options  to  the
                             /etc/rc.conf file.

       10baseT/UTP           Set  10Mbps  operation.   The  mediaopt  option  can  also be used to select either
                             full-duplex or half-duplex modes.

       100baseTX             Set 100Mbps (Fast Ethernet) operation.  The mediaopt option can  also  be  used  to
                             select either full-duplex or half-duplex modes.

       The wb driver supports the following media options:

       full-duplex           Force full duplex operation.

       half-duplex           Force half duplex operation.

       Note  that  the 100baseTX media type is only available if supported by the adapter.  For more information
       on configuring this device, see ifconfig(8).

HARDWARE

       The wb driver supports Winbond W89C840F based Fast Ethernet adapters and embedded controllers including:

       •   Trendware TE100-PCIE

DIAGNOSTICS

       wb%d: couldn't map memory  A fatal initialization error has occurred.

       wb%d: couldn't map interrupt  A fatal initialization error has occurred.

       wb%d: watchdog timeout  The device has stopped responding to the network, or there is a problem with  the
       network connection (cable).

       wb%d: no memory for rx list  The driver failed to allocate an mbuf for the receiver ring.

       wb%d:  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.

       wb%d: chip is in D3 power state -- setting to D0  This message applies only  to  adapters  which  support
       power  management.  Some operating systems place the controller in low power mode when shutting down, and
       some PCI BIOSes fail to bring the chip out of this state before configuring it.  The controller loses all
       of its PCI configuration in the D3 state, so if the BIOS does not set it back to full power mode in time,
       it will not be able to configure it correctly.  The driver tries to detect this condition and  bring  the
       adapter  back  to  the  D0 (full power) state, but this may not be enough to return the driver to a fully
       operational condition.  If you see this message at boot time and the driver fails to attach the device as
       a network interface, you will have to perform second warm boot to have the device properly configured.

       Note that this condition only occurs when warm booting from another operating system.  If you power  down
       your system prior to booting FreeBSD, the card should be configured correctly.

SEE ALSO

       arp(4), miibus(4), netintro(4), ng_ether(4), ifconfig(8)

HISTORY

       The wb device driver first appeared in FreeBSD 3.0.

AUTHORS

       The wb driver was written by Bill Paul <wpaul@ctr.columbia.edu>.

BUGS

       The  Winbond  chip  seems to behave strangely in some cases when the link partner switches modes.  If for
       example both sides are set to 10Mbps half-duplex, and the other end is changed  to  100Mbps  full-duplex,
       the  Winbond's receiver suddenly starts writing trash all over the RX descriptors.  The wb driver handles
       this by forcing a reset of both the controller chip and attached PHY.  This is drastic, but it appears to
       be the only way to recover properly from this condition.

Debian                                            July 16, 2005                                            WB(4)