1.\"
2.\" Copyright (c) 1998 Michael Smith
3.\" All rights reserved.
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6.\" modification, are permitted provided that the following conditions
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26.\" $FreeBSD: head/share/man/man4/man4.i386/cs.4 139097 2004-12-21 01:09:34Z brueffer $
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| 26.\" $FreeBSD: head/share/man/man4/man4.i386/cs.4 148145 2005-07-19 00:26:30Z trhodes $ |
27.\"
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28.Dd July 20, 1998
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| 28.Dd July 16, 2005 |
29.Dt CS 4 i386
30.Os
31.Sh NAME
32.Nm cs
|
33.Nd Ethernet device driver
|
| 33.Nd "Ethernet device driver" |
34.Sh SYNOPSIS
|
35To compile support for the
36.Nm
37driver into your kernel, place the following line in your kernel configuration
38file:
39.Bd -ragged -offset indent |
40.Cd "device cs"
|
| 41.Ed |
42.Pp
|
43Alternatively, to load the
44.Nm
45driver at boot time, place the following line in
46.Xr loader.conf 5 :
47.Bd -literal -offset indent
48if_cs_load="YES"
49.Ed
50.Pp |
51In
52.Pa /boot/device.hints :
53.Cd hint.cs.0.at="isa"
54.Cd hint.cs.0.port="0x300"
55.Cd hint.cs.0.irq="10"
56.Cd hint.cs.0.maddr="0xd000"
57.Sh DESCRIPTION
58The
59.Nm
60driver provides support for ISA Ethernet adapters based on the
61.Tn Crystal Semiconductor CS8900
62and
63.Tn CS8920
64NICs.
65These devices are used on the
66.Tn IBM EtherJet ISA
67adapters and in many embedded applications where the high integration, small
68size and low cost of the CS89x0 family compensate for their drawbacks.
69.Pp
70The
71.Nm
72driver will obtain configuration parameters either from
73.Pa /boot/device.hints
74or from the card.
75At least the I/O port number must be specified.
76Other parameters specified in
77.Pa /boot/device.hints
78will be used if present;
79the card may be soft-configured so these may be any valid
80value.
81Adapters based on the CS8920 normally offer PnP configuration and the driver
82will detect the
83.Tn IBM EtherJet
84and the
85.Tn CSC6040
86adapters automatically.
87.Pp
88Note that the CS8900 is limited to 4 IRQ values; these are normally implemented
89as 5, 10, 11 and 12.
90The CS8920 has no such limitation.
91.Pp
92Memory-mapped and DMA operation are not supported at this time.
93.Sh DIAGNOSTICS
94.Bl -diag
95.It "cs%d: full/half duplex negotiation timeout"
96The attempt to negotiate duplex settings with the hub timed out.
97This may
98indicate a cabling problem or a faulty or incompatible hub.
99.It "cs%d: failed to enable <media>"
100The CS89x0 failed to select the nominated media, either because it is not
101present or not operating correctly.
102.It "cs%d: No EEPROM, assuming defaults"
103The CS89x0 does not have an EEPROM, or the EEPROM is hopelessly damaged.
104Operation
105will only be successful if the configuration entry lists suitable values for
106the adapter.
107.It "cs%d: Invalid irq"
108The IRQ specified in the configuration entry is not valid for the adapter.
109.It "cs%d: Could not allocate memory for NIC"
110There is a critical memory shortage.
111The adapter will not function.
112.It "cs%d: Adapter has no media"
113The adapter is not configured for a specific media type.
114The media type will have
115to be manually set.
116.It "This is a %s, but LDN %d is disabled"
117The PnP probe code found a recognised adapter, but the adapter is disabled.
118.It "failed to read pnp parms"
119A PnP adapter was found, but configuration parameters for it could not be read.
120.It "failed to pnp card parameters"
121The parameters obtained via PnP were not accepted by the driver.
122The adapter
123may not function.
124.El
125.Sh CAVEATS
126The CS89x0 family of adapters have a very small RAM buffer (4K).
127This may
128cause problems with extremely high network loads or bursty network traffic.
129In particular, NFS operations should be limited to 1k read/write transactions
130in order to avoid overruns.
131.Sh SEE ALSO
132.Xr arp 4 ,
133.Xr netintro 4 ,
134.Xr ng_ether 4 ,
135.Xr ifconfig 8
136.Sh AUTHORS
137.An -nosplit
138The
139.Nm
140device driver was written by
141.An Maxim Bolotin
142and
143.An Oleg Sharoiko .
144This manpage was written by
145.An Michael Smith .
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