.\" Copyright (c) 1997, 1998, 1999, 2000
.\"	Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
.\"
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.\" $FreeBSD: head/share/man/man4/kue.4 267938 2014-06-26 21:46:14Z bapt $
.\"
.Dd May 27, 2021
.Dt KUE 4
.Os
.Sh NAME
.Nm kue
.Nd "Kawasaki LSI KL5KUSB101B USB Ethernet driver"
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device uhci"
.Cd "device ohci"
.Cd "device usb"
.Cd "device uether"
.Cd "device kue"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
if_kue_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for USB Ethernet adapters based on the Kawasaki
LSI KL5KLUSB101B chipset.
.Pp
The KL5KLUSB101B supports a 128-entry multicast filter, single perfect
filter entry for the station address and promiscuous mode.
Packets are
received and transmitted over separate USB bulk transfer endpoints.
.Pp
The Kawasaki chipset supports only 10Mbps half-duplex mode, hence there
are no
.Xr ifmedia 4
modes to select.
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
.Sh HARDWARE
The
.Nm
driver supports Kawasaki LSI KL5KLUSB101B based USB Ethernet
adapters including:
.Pp
.Bl -bullet -compact
.It
3Com 3c19250
.It
3Com 3c460 HomeConnect Ethernet USB Adapter
.It
ADS Technologies USB-10BT
.It
AOX USB101
.It
ATen UC10T
.It
Abocom URE 450
.It
Corega USB-T
.It
D-Link DSB-650C
.It
Entrega NET-USB-E45, NET-HUB-3U1E
.It
I/O Data USB ETT
.It
Kawasaki DU-H3E
.It
LinkSys USB10T
.It
Netgear EA101
.It
Peracom USB Ethernet Adapter
.It
Psion Gold Port USB Ethernet adapter
.It
SMC 2102USB, 2104USB
.El
.Sh DIAGNOSTICS
.Bl -diag
.It "kue%d: watchdog timeout"
A packet was queued for transmission and a transmit command was
issued, however the device failed to acknowledge the transmission
before a timeout expired.
.It "kue%d: no memory for rx list"
The driver failed to allocate an mbuf for the receiver ring.
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr netintro 4 ,
.Xr ng_ether 4 ,
.Xr usb 4 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
device driver first appeared in
.Fx 4.0 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Bill Paul Aq Mt wpaul@ee.columbia.edu .
.Sh BUGS
The
.Nm
driver does not accumulate Ethernet collisions statistics because the
Kawasaki firmware does not appear to maintain any internal statistics.