NAME

       cs — Ethernet device driver

SYNOPSIS

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

             device cs

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

             if_cs_load="YES"

       In /boot/device.hints:
       hint.cs.0.at="isa"
       hint.cs.0.port="0x300"
       hint.cs.0.irq="10"
       hint.cs.0.maddr="0xd000"

DESCRIPTION

       The  cs  driver  provides support for ISA Ethernet adapters based on the Crystal Semiconductor CS8900 and
       CS8920 NICs.  These devices are used on the IBM EtherJet ISA adapters and in many  embedded  applications
       where the high integration, small size and low cost of the CS89x0 family compensate for their drawbacks.

       The  cs  driver will obtain configuration parameters either from /boot/device.hints or from the card.  At
       least the I/O port number must be specified.  Other parameters specified in  /boot/device.hints  will  be
       used  if present; the card may be soft-configured so these may be any valid value.  Adapters based on the
       CS8920 normally offer PnP configuration and the driver will detect  the  IBM  EtherJet  and  the  CSC6040
       adapters automatically.

       Note that the CS8900 is limited to 4 IRQ values; these are normally implemented as 5, 10, 11 and 12.  The
       CS8920 has no such limitation.

       Memory-mapped and DMA operation are not supported at this time.

       In  addition to the ISA devices, the PC Card devices based on the CS889x0 family are also supported.  The
       IBM EtherJet PCMCIA Card is the only known device based on this chip.  The PC Card support does not  need
       the above specific ISA hints to work.  The PC Card support may not work for 10base2 (thinnet) connections
       and may bogusly claim to support 10base5 (there are no known cards that have an AUI necessary for 10base5
       support on their dongles).

DIAGNOSTICS

       cs%d:  full/half  duplex negotiation timeout  The attempt to negotiate duplex settings with the hub timed
       out.  This may indicate a cabling problem or a faulty or incompatible hub.

       cs%d: failed to enable <media>  The CS89x0 failed to select the nominated media, either because it is not
       present or not operating correctly.

       cs%d: No EEPROM, assuming defaults  The CS89x0 does not have an  EEPROM,  or  the  EEPROM  is  hopelessly
       damaged.   Operation  will  only  be  successful if the configuration entry lists suitable values for the
       adapter.

       cs%d: Invalid irq  The IRQ specified in the configuration entry is not valid for the adapter.

       cs%d: Could not allocate memory for NIC  There is a critical  memory  shortage.   The  adapter  will  not
       function.

       cs%d: Adapter has no media  The adapter is not configured for a specific media type.  The media type will
       have to be manually set.

       This  is  a %s, but LDN %d is disabled  The PnP probe code found a recognised adapter, but the adapter is
       disabled.

       failed to read pnp parms  A PnP adapter was found, but configuration parameters for it could not be read.

       failed to pnp card parameters  The parameters obtained via PnP were not  accepted  by  the  driver.   The
       adapter may not function.

SEE ALSO

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

AUTHORS

       The cs device driver was written by Maxim Bolotin and Oleg Sharoiko.  This manpage was written by Michael
       Smith.

CAVEATS

       The  CS89x0 family of adapters have a very small RAM buffer (4K).  This may cause problems with extremely
       high network loads or bursty network traffic.  In particular, NFS operations  should  be  limited  to  1k
       read/write transactions in order to avoid overruns.

Debian                                            July 16, 2005                                            CS(4)