117 lines
3.6 KiB
Groff
117 lines
3.6 KiB
Groff
.\" $NetBSD: ichlpcib.4,v 1.5 2011/03/18 21:17:17 jruoho Exp $
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.\"
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.\" Copyright (c) 2004 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Minoura Makoto and Matthew R. Green.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd March 18, 2011
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.Dt ICHLPCIB 4 x86
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.Os
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.Sh NAME
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.Nm ichlpcib
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.Nd Intel ICH LPC Interface Bridge
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.Sh SYNOPSIS
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.Cd "ichlpcib* at pci? dev ? function ?"
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.Cd "fwhrng* at ichlpcib?"
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.Cd "hpet0 at ichlpcib?"
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.Cd "isa0 at ichlpcib?"
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.Cd "gpio* at ichlpcib?"
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.Sh DESCRIPTION
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The
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.Nm
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driver supports the Intel ICH LPC Interface Bridges on compatible
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chipsets.
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Supported functions include:
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.Bl -bullet
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.It
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Watchdog timer.
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The watchdog timer may be configured for a 2 seconds (on ICH6 or newer)
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and 4 seconds (on ICH5 or older) min period and for a 39 seconds
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(on ICH5 or older) or 613 seconds max period (on ICH6 or newer).
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.It
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Power Management timer.
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A 24-bit timer available to be used by the timecounters framework.
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.It
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SpeedStep.
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In some older systems the SpeedStep function is also available, and can be
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used to switch between high and low frequency (to reduce power consumption)
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via the
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.Li machdep.speedstep_state
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.Xr sysctl 8
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node.
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A value of 0 will use the low frequency (low power) and a 1 will
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enable the high frequency (full power).
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.It
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General Purpose Input/Output.
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The ICH provides up to 64 I/O pins which can be accessed through the
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.Xr gpio 4
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framework.
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.El
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.Sh SEE ALSO
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.Xr est 4 ,
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.Xr fwhrng 4 ,
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.Xr gpio 4 ,
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.Xr hpet 4 ,
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.Xr ioapic 4 ,
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.Xr sysctl 8 ,
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.Xr wdogctl 8
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.Rs
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.%A Intel Corporation
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.%T Intel I/O Controller Hub 6 (ICH6) Family
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.%D January, 2005
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.%U http://www.intel.com/assets/pdf/datasheet/301473.pdf
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.Re
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.Rs
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.%A Intel Corporation
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.%T Intel I/O Controller Hub 7 (ICH7) Family
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.%D April, 2007
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.%U http://www.intel.com/Assets/PDF/datasheet/307013.pdf
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.Re
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.Rs
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.%A Intel Corporation
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.%T Intel I/O Controller Hub 8 (ICH8) Family
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.%D May, 2007
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.%U http://www.intel.com/assets/pdf/datasheet/313056.pdf
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.Re
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.Rs
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.%A Intel Corporation
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.%T Using the Intel ICH Family Watchdog Timer (WDT)
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.%D September, 2002
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.%U ftp://download.intel.com/design/chipsets/applnots/29227301.pdf
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.Re
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Nx 3.0 .
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.Sh AUTHORS
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The
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.Nm
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driver was written by
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.An Minoura Makoto
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and
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.An Matthew R. Green .
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