161 lines
4.8 KiB
Groff
161 lines
4.8 KiB
Groff
.\" Copyright (c) 2004 Daniel Hartmeier
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\"
|
|
.\" - Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" - Redistributions in binary form must reproduce the above
|
|
.\" copyright notice, this list of conditions and the following
|
|
.\" disclaimer in the documentation and/or other materials provided
|
|
.\" with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $NetBSD: cdce.4,v 1.4 2004/12/08 18:35:56 peter Exp $
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 21, 2018
|
|
.Dt CDCE 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm cdce
|
|
.Nd "USB Communication Device Class Ethernet (CDC ECM/NCM) 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 miibus"
|
|
.Cd "device uether"
|
|
.Cd "device cdce"
|
|
.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_cdce_load="YES"
|
|
.Ed
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver provides support for USB Host-to-Host (aka USB-to-USB) and
|
|
USB-to-Ethernet bridges based on the USB Communication Device Class
|
|
Ethernet Control Model (CDC ECM) and Network Control Model (CDC NCM)
|
|
specifications.
|
|
It also provides device-side CDC ECM support.
|
|
.Pp
|
|
The USB bridge appears as a regular network interface on both sides,
|
|
transporting Ethernet frames.
|
|
.Pp
|
|
For more information on configuring this device, see
|
|
.Xr ifconfig 8 .
|
|
.Pp
|
|
USB 1.x bridges support speeds of up to 12Mbps, and USB 2.0 speeds of
|
|
up to 480Mbps.
|
|
.Pp
|
|
Packets are
|
|
received and transmitted over separate USB bulk transfer endpoints.
|
|
.Pp
|
|
The
|
|
.Nm
|
|
driver does not support different media types or options.
|
|
.Sh HARDWARE
|
|
The following devices are supported by the
|
|
.Nm
|
|
driver:
|
|
.Pp
|
|
.Bl -bullet -compact
|
|
.It
|
|
Prolific PL-2501 Host-to-Host Bridge Controller
|
|
.It
|
|
Sharp Zaurus PDA
|
|
.It
|
|
Terayon TJ-715 DOCSIS Cable Modem
|
|
.El
|
|
.Sh DIAGNOSTICS
|
|
.Bl -diag
|
|
.It "cdce%d: no union descriptor"
|
|
The driver could not fetch an interface descriptor from the USB
|
|
device.
|
|
For a manually added USB vendor/product, the CDCE_NO_UNION flag
|
|
can be tried to work around the missing descriptor.
|
|
.It "cdce%d: no data interface"
|
|
.It "cdce%d: could not read endpoint descriptor"
|
|
.It "cdce%d: unexpected endpoint"
|
|
.It "cdce%d: could not find data bulk in/out"
|
|
For a manually added USB vendor/product, these errors indicate
|
|
that the bridge is not compatible with the driver.
|
|
.It "cdce%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 "cdce%d: no memory for rx list -- packet dropped!"
|
|
Memory allocation through MGETHDR or MCLGET failed, the system
|
|
is running low on mbufs.
|
|
.It "cdce%d: abort/close rx/tx pipe failed"
|
|
.It "cdce%d: rx/tx list init failed"
|
|
.It "cdce%d: open rx/tx pipe failed"
|
|
.It "cdce%d: usb error on rx/tx"
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr arp 4 ,
|
|
.Xr intro 4 ,
|
|
.Xr ipheth 4 ,
|
|
.Xr netintro 4 ,
|
|
.Xr urndis 4 ,
|
|
.Xr usb 4 ,
|
|
.Xr ifconfig 8
|
|
.Rs
|
|
.%T "Universal Serial Bus Class Definitions for Communication Devices"
|
|
.%U http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
|
|
.Re
|
|
.Rs
|
|
.%T "Data sheet Prolific PL-2501 Host-to-Host Bridge/Network Controller"
|
|
.%U http://tech.prolific.com.tw/visitor/fcabdl.asp?fid=20679530
|
|
.Re
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device driver first appeared in
|
|
.Ox 3.6 ,
|
|
.Nx 3.0
|
|
and
|
|
.Fx 6.0 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
The
|
|
.Nm
|
|
driver was written by
|
|
.An Craig Boston Aq Mt craig@tobuj.gank.org
|
|
based on the
|
|
.Xr aue 4
|
|
driver written by
|
|
.An Bill Paul Aq Mt wpaul@windriver.com
|
|
and ported to
|
|
.Ox
|
|
by
|
|
.An Daniel Hartmeier Aq Mt dhartmei@openbsd.org .
|
|
.Sh CAVEATS
|
|
Many USB devices notoriously fail to report their class and interfaces
|
|
correctly.
|
|
Undetected products might work flawlessly when their vendor and product IDs
|
|
are added to the driver manually.
|