CS(4) BSD/i386 Kernel Interfaces Manual CS(4)NAME
cs — Crystal Semiconductor CS8900 and CS8920 ethernet device driver
SYNOPSIS
device cs0 at isa? port 0x300 irq ?
device cs1 at isa? port 0x300 irq 10 iomem 0xd0000
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 the con‐
figuration entry or from the card. Parameters specified in the configu‐
ration entry 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.
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 ALSOarp(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.
BSD July 20, 1998 BSD