d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Manual page for the asmc driver.

Browse Source 
Approved by:	njl (mentor)
This commit is contained in:
Rui Paulo 2007-11-12 17:52:00 +00:00
parent 2e2e6cc953
commit 75a1ecdafb
2 changed files with 156 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
share/man/man4/Makefile
View File

@ -20,6 +20,7 @@ MAN= aac.4 \
amr.4 \
an.4 \
arcmsr.4 \
${_asmc.4} \
asr.4 \
ata.4 \
atapicam.4 \
@ -541,6 +542,7 @@ MLINKS+=xl.4 if_xl.4
.if ${MACHINE_ARCH} == "amd64" || ${MACHINE_ARCH} == "i386"
_acpi_dock.4= acpi_dock.4
_asmc.4= asmc.4
_amdsmb.4= amdsmb.4
_coretemp.4= coretemp.4
_hptiop.4= hptiop.4

154
share/man/man4/asmc.4 Normal file
View File

@ -0,0 +1,154 @@
.\"-
.\" Copyright (c) 2007 Rui Paulo <rpaulo@FreeBSD.org>
.\" All rights reserved.
.\"
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 10, 2007
.Dt ASMC 4
.Os
.Sh NAME
.Nm asmc
.Nd device driver for the Apple System Management Console (SMC)
.Sh SYNOPSIS
To compile this driver into the kernel, place the following line in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device asmc"
.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
asmc_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver controls the Apple System Management Console (SMC for short)
found on Intel Apple systems.
.Pp
The SMC is known to be found on the following systems:
.Pp
.Bl -bullet -offset indent -compact
.It
MacBook (any generation)
.It
MacBook Pro (any generation)
.It
Intel MacMini
.El
.Pp
With this driver, you can configure your keyboard backlight
brigthness, check temperatures of several sensors, check the speed of
the internal fans and check the status of the Sudden Motion Sensor.
.Pp
Variables regarding to the SMC control and inspection are exported via
.Xr sysctl 4
under the device tree
.Va dev.asmc .
.Sh KEYBOARD BACKLIGHT
On
.Em MacBook Pro
systems, you can control the keyboard brigthness by writting values to
the
.Va dev.asmc.%d.light.left
or
.Va dev.asmc.%d.light.right
sysctl MIBs.
.Pp
Each of these sysctl MIBs contain the raw value returned by the left
and right light sensors.
.Sh TEMPERATURES
The number of temperature sensors and their description varies among
systems.
You can inspect the temperature sensors on your system by traversing
the sysctl
.Va dev.asmc.temp
MIB.
.Pp
All values are in degrees celsius.
.Sh SYSTEM FANS
The
.Va dev.asmc.fan.%d
sysctl tree contains the leaf nodes
.Va speed ,
.Va safespeed ,
.Va minspeed ,
.Va maxspeed
and
.Va targetspeed .
Each of these leaf nodes represent the current fan speed, the safest
minimum fan speed, the mininum speed and the maximum speed
respectively.
.Pp
All values are in RPM.
.Sh SUDDEN MOTION SENSOR
The Sudden Motion Sensor (SMS for short) is a device that detects
laptop movement and notifies the operating system via an interrupt.
The sysctl MIBs present under
.Va dev.asmc.sms
all relate to the SMS.
.Pp
The most interesting usage of this device is to park the disk heads
when the laptop is moved harshly. First, you need to install
.Xr ataidle 1
and then configure
.Xr devd 8
the following way:
.Bd -literal -offset indent
notify 0 {
match "system" "ISA";
match "subsystem" "asmc";
action "/usr/local/sbin/ataidle -s X Y";
};
.Ed
.Pp
Don't forget to change the
.Va X
and
.Va Y
values in the command above.
.Pp
Also, please note that parking the disk heads too many times can
dramatically reduce your hard drive's life span. Don't rely solely on
the SMS to protect your hard drive: good care and common sense can
increase your hard drive's life.
.Sh SEE ALSO
.Xr ataidle 1 ,
.Xr devd 8 ,
.Xr sysctl 8
.Sh BUGS
Support for the latest models was never tested and is most likely not
fully working.
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An -nosplit
.An Rui Paulo Aq rpaulo@FreeBSD.org
(Google Summer of Code project).