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author | rpaulo <rpaulo@FreeBSD.org> | 2007-11-12 17:52:00 +0000 |
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committer | rpaulo <rpaulo@FreeBSD.org> | 2007-11-12 17:52:00 +0000 |
commit | 117b1bfb947a0ace2d8a87ce362996ed73f6e932 (patch) | |
tree | e720f914c49e168b8376323407b7dcea071c0698 /share/man/man4/asmc.4 | |
parent | 0923616b22e7c00a0e8931b36372dfe96770474b (diff) | |
download | FreeBSD-src-117b1bfb947a0ace2d8a87ce362996ed73f6e932.zip FreeBSD-src-117b1bfb947a0ace2d8a87ce362996ed73f6e932.tar.gz |
Manual page for the asmc driver.
Approved by: njl (mentor)
Diffstat (limited to 'share/man/man4/asmc.4')
-rw-r--r-- | share/man/man4/asmc.4 | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/share/man/man4/asmc.4 b/share/man/man4/asmc.4 new file mode 100644 index 0000000..ea266ec --- /dev/null +++ b/share/man/man4/asmc.4 @@ -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). |