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     tl — Texas Instruments ThunderLAN Ethernet device driver


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

           device miibus
           device tl

     Alternatively, to load the driver as a module at boot time, place the following line in



     The tl driver is not present in FreeBSD 13.0 and later.  See for more information.


     The tl driver provides support for PCI Ethernet adapters based on the Texas Instruments
     ThunderLAN Ethernet controller chip.

     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.

     The tl driver supports the following media types:

     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.

     10baseT/UTP           Set 10Mbps operation.

     100baseTX             Set 100Mbps (Fast Ethernet) operation.

     10base5/AUI           Enable AUI/BNC interface (useful only with the built-in PHY).

     The tl driver supports the following media options:

     full-duplex           Force full duplex operation.

     half-duplex           Force half duplex operation.

     hw-loopback           Enable hardware loopback mode.

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


     The tl driver supports Texas Instruments ThunderLAN based Ethernet and Fast Ethernet
     adapters including a large number of Compaq PCI Ethernet adapters.  Also supported are:

        Olicom OC-2135/2138 10/100 TX UTP adapter
        Olicom OC-2325/OC-2326 10/100 TX UTP adapter
        Racore 8148 10baseT/100baseTX/100baseFX adapter
        Racore 8165 10/100baseTX adapter

     The tl driver also supports the built-in Ethernet adapters of various Compaq Prosignia
     servers and Compaq Deskpro desktop machines including:

        Compaq Netelligent 10
        Compaq Netelligent 10 T PCI UTP/Coax
        Compaq Netelligent 10/100
        Compaq Netelligent 10/100 Dual-Port
        Compaq Netelligent 10/100 Proliant
        Compaq Netelligent 10/100 TX Embedded UTP
        Compaq Netelligent 10/100 TX UTP
        Compaq NetFlex 3P
        Compaq NetFlex 3P Integrated
        Compaq NetFlex 3P w/BNC


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

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

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

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

     tl%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.


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


     The tl device driver first appeared in FreeBSD 2.2.


     The tl driver was written by Bill Paul <>.