NAME    [Toc]    [Back]

     lmc - Lan Media  Corporation  SSI/DS1/HSSI/DS3  card  device
driver

SYNOPSIS    [Toc]    [Back]

     lmc* at pci? dev ? function ?

DESCRIPTION    [Toc]    [Back]

     The  lmc  driver provides support for the Lan Media Corporation SSI, DS1,
     HSSI, and DS3 PCI WAN adapters based on the DEC 21140 Ethernet chip.  The
     adapters  use  a DEC 21140 Ethernet chip for the PCI bus interface.  Leaving
 the bus interface chip, the data  path  goes  through  a
field programmable
 gate array, where HDLC processing is accomplished.
Leaving the
     FPGA, there are FIFO buffers and  the  DS1,  DS3,  and  V.35
drive circuitry.

     The intent is to provide a synchronous serial link with HDLC
framing at
     speeds of up to 10Mbps (for the SSI card), 52Mbps  (for  the
HSSI card),
     BNC  connectors  for 45Mbps operation without a CSU/DSU (DS3
card), and an
     RJ45 jack for T1/E1 operation without a CSU/DSU (DS1  card).

     The card will automatically use HDLC framing and defaults to
external
     clock source.  For the  DS1  and  DS3  cards  with  built-in
CSU/DSU functionality,
  the  clock source is always external (from CSU/DSU).
The ability
     to set cable length is not currently implemented.

     Using the sppp(4) driver, you can also use the ppp protocol.
In either
     case,  the lmc interface should be configured as a point-topoint link.

DIAGNOSTICS    [Toc]    [Back]

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

     lmc%d:  couldn't establish interrupt  A fatal initialization
error has occurred.


     lmc%d: enabling keepalive  Cisco HDLC keepalive packets will
be transmitted.


     lmc%d:  disabling  keepalive   Cisco  HDLC keepalive packets
will not be
     transmitted.

     lmc%d: clock internal  The card is using  internal  clocking
for the line.

     lmc%d:  clock  external  The card is using external clocking
for the line.

     lmc%d: asserting DTR and RTS  The card is  sending  DTR  and
RTS signals on
     the line.

     lmc%d:  deasserting DTR and RTS  The card is not sending DTR
and RTS signals
 on the line.

     lmc%d: Abnormal interrupt  The card received  an  incomplete
request.  This
     may be a sign of a hardware fault.

     lmc%d: tx_intr: failed to dequeue mbuf?!?  Only available if
compiled
     with LMC_DEBUG.

     lmc%d: txput: tx not  running   Problem  from  tulip.   Only
available if compiled
 with LMC_DEBUG.

SEE ALSO    [Toc]    [Back]

     netintro(4), sppp(4), ifconfig(8), lmccontrol(8)

     Lan  Media  Corporation  has  a web site with data, descriptions, and pictures
 of their cards at www.lanmedia.com.

AUTHORS    [Toc]    [Back]

     The lmc device driver was written by Michael Graff, and  was
derived in
     part  from  Matt Thomas' de(4) driver.  The OpenBSD port and
manual page
     are from Chris Cappuccio.  Later enhancements to support the
LMC1200 card
     are based on LMC's Linux driver.

OpenBSD      3.6                         October     15,     1999