diff options
author | trhodes <trhodes@FreeBSD.org> | 2003-05-18 19:55:39 +0000 |
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committer | trhodes <trhodes@FreeBSD.org> | 2003-05-18 19:55:39 +0000 |
commit | 24772e8daf3a9ad3c80f9d2e26218d21dc63db3a (patch) | |
tree | 4c06901cd5d7d44084fdba335c1548d48169ab75 /share/man | |
parent | 5c072d87653305b7be5997aa33e681dfcbe68f9a (diff) | |
download | FreeBSD-src-24772e8daf3a9ad3c80f9d2e26218d21dc63db3a.zip FreeBSD-src-24772e8daf3a9ad3c80f9d2e26218d21dc63db3a.tar.gz |
Add a manual page for the USB Enhanced Host Controller Driver.
Submitted by: ticso (who obtained the original version from NetBSD)
Diffstat (limited to 'share/man')
-rw-r--r-- | share/man/man4/Makefile | 1 | ||||
-rw-r--r-- | share/man/man4/ehci.4 | 94 |
2 files changed, 95 insertions, 0 deletions
diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile index 36a72f2..1111ca0 100644 --- a/share/man/man4/Makefile +++ b/share/man/man4/Makefile @@ -47,6 +47,7 @@ MAN= aac.4 \ dummynet.4 \ ed.4 \ ef.4 \ + ehci.4 \ em.4 \ exca.4 \ faith.4 \ diff --git a/share/man/man4/ehci.4 b/share/man/man4/ehci.4 new file mode 100644 index 0000000..e18c903 --- /dev/null +++ b/share/man/man4/ehci.4 @@ -0,0 +1,94 @@ +.\" $NetBSD: ehci.4,v 1.8 2001/11/21 17:22:56 augustss Exp $ +.\" +.\" Copyright (c) 2001 The NetBSD Foundation, Inc. +.\" All rights reserved. +.\" +.\" This code is derived from software contributed to The NetBSD Foundation +.\" by Lennart Augustsson. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the NetBSD +.\" Foundation, Inc. and its contributors. +.\" 4. Neither the name of The NetBSD Foundation nor the names of its +.\" contributors may be used to endorse or promote products derived +.\" from this software without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. +.\" +.\" $FreeBSD$ +.\" +.Dd November 5, 2001 +.Dt EHCI 4 +.Os +.Sh NAME +.Nm ehci +.Nd USB Enhanced Host Controller driver +.Sh SYNOPSIS +.Cd "device ehci" +.Sh DESCRIPTION +The +.Nm +driver provides support for the +.Tn USB +Enhanced Host Controller Interface, +which is used by +.Tn USB +2.0 controllers. +.Pp +.Tn EHCI +controllers are peculiar in that they can only handle the +.Tn USB +2.0 protocol. +This means that they normally have one or more companion controllers +(i.e., +.Xr ohci 4 +or +.Xr uhci 4 ) +handling USB 1.x devices. +Consequently each +.Tn USB +connector is electrically connected to two +.Tn USB +controllers. +The handling of this is totally automatic, +but can be noticed since +.Tn USB +1.x and +.Tn USB +2.0 devices plugged in to the same +connector appear to connect to different USB busses. +.Sh SEE ALSO +.Xr ohci 4 , +.Xr uhci 4 , +.Xr usb 4 +.Sh HISTORY +The +.Nm +device driver first appeared in +.Fx 5.1 . +.Sh BUGS +The driver is not finished and is quite buggy. +.Pp +Currently there is no support for hubs that are connected with high speed upstream +and low or full speed downstream (i.e., for transaction translators). +.Pp +There is also no support for interrupt or isochronous transfers.
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