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CS(4)		    DragonFly/i386 Kernel Interfaces Manual		 CS(4)


NAME

     cs -- Crystal Semiconductor CS8900 and CS8920 ethernet device driver


SYNOPSIS

     device cs


DESCRIPTION

     The cs driver provides support for ethernet adapters based on the Crystal
     Semiconductor CS8900 and CS8920 NICs.  These devices are used on the IBM
     EtherJet PCMCIA 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 from the card.	Param-
     eters specified in the configuration entry will be used if present; the
     card may be soft-configured so these may be any valid value.  The driver
     will detect the IBM EtherJet adapters automatically.

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


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 recog-
     nised 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 parametars  The parameters obtained via PnP were not
     accepted by the driver.  The adapter may not function.


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.


SEE ALSO

     arp(4), ifmedia(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.

DragonFly 4.1			 July 20, 1998			 DragonFly 4.1

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