486 lines
11 KiB
Groff
486 lines
11 KiB
Groff
.\" Copyright (c) 2005 Christian Brueffer
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.\" Copyright (c) 2005 Markus Brueffer
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.\" All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 24, 2012
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.Dt ACPI_IBM 4
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.Os
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.Sh NAME
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.Nm acpi_ibm
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.Nd "ACPI extras driver for IBM laptops"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device acpi_ibm"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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acpi_ibm_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for hotkeys and other components of IBM laptops.
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The main purpose of this driver is to provide an interface,
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accessible via
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.Xr sysctl 8
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and
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.Xr devd 8 ,
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through which applications can determine the status of
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various laptop components.
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.Pp
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While the
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.Xr sysctl 8
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interface is enabled automatically after loading the driver, the
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.Xr devd 8
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interface has to be enabled explicitly, as it may alter the default action of
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certain keys.
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This is done by setting the
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.Va events
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sysctl as described below.
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Specifying which keys should generate events is done by setting a bitmask,
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whereas each bit represents one key or key combination.
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This bitmask, accessible via the
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.Va eventmask
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sysctl, is set to
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.Va availmask
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by default, a value representing all possible keypress events on the specific
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ThinkPad model.
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.Ss Xr devd 8 Ss Events
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Hotkey events received by
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.Xr devd 8
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provide the following information:
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.Pp
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.Bl -tag -width "subsystem" -offset indent -compact
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.It system
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.Qq Li ACPI
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.It subsystem
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.Qq Li IBM
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.It type
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The source of the event in the ACPI namespace.
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The value depends on the model.
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.It notify
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Event code (see below).
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.El
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.Pp
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Depending on the ThinkPad model, event codes may vary.
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On a ThinkPad T41p these are as follows:
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.Pp
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.Bl -tag -width "subsystem" -offset indent -compact
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.It Li 0x01
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Fn + F1
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.It Li 0x02
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Fn + F2
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.It Li 0x03
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Fn + F3 (LCD backlight)
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.It Li 0x04
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Fn + F4 (Suspend to RAM)
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.It Li 0x05
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Fn + F5 (Bluetooth)
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.It Li 0x06
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Fn + F6
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.It Li 0x07
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Fn + F7 (Screen expand)
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.It Li 0x08
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Fn + F8
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.It Li 0x09
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Fn + F9
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.It Li 0x0a
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Fn + F10
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.It Li 0x0b
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Fn + F11
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.It Li 0x0c
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Fn + F12 (Suspend to disk)
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.It Li 0x0d
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Fn + Backspace
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.It Li 0x0e
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Fn + Insert
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.It Li 0x0f
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Fn + Delete
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.It Li 0x10
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Fn + Home (Brightness up)
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.It Li 0x11
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Fn + End (Brightness down)
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.It Li 0x12
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Fn + PageUp (ThinkLight)
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.It Li 0x13
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Fn + PageDown
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.It Li 0x14
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Fn + Space (Zoom)
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.It Li 0x15
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Volume Up
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.It Li 0x16
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Volume Down
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.It Li 0x17
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Mute
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.It Li 0x18
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Access IBM Button
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.El
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.Ss Xr led 4 Ss Interface
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The
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.Nm
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driver provides a
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.Xr led 4
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interface for the ThinkLight.
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The ThinkLight can be made to blink by writing
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.Tn ASCII
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strings to the
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.Pa /dev/led/thinklight
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device.
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.Sh SYSCTL VARIABLES
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The following sysctls are currently implemented:
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.Bl -tag -width indent
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.It Va dev.acpi_ibm.0.initialmask
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(read-only)
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Bitmask of ACPI events before the
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.Nm
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driver was loaded.
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.It Va dev.acpi_ibm.0.availmask
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(read-only)
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Bitmask of all supported ACPI events.
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.It Va dev.acpi_ibm.0.events
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Enable ACPI events and set the
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.Va eventmask
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to
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.Va availmask .
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Without the
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.Nm
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driver being loaded, only the Fn+F4 button generates an ACPI event.
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.It Va dev.acpi_ibm.0.eventmask
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Sets the ACPI events which are reported to
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.Xr devd 8 .
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Fn+F3, Fn+F4 and Fn+F12 always generate ACPI events, regardless which value
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.Va eventmask
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has.
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Depending on the ThinkPad model, the meaning of different bits in the
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.Va eventmask
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may vary.
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On a ThinkPad T41p this is a bitwise OR of the following:
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.Pp
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.Bl -tag -width indent-two -compact
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.It Li 1
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Fn + F1
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.It Li 2
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Fn + F2
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.It Li 4
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Fn + F3 (LCD backlight)
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.It Li 8
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Fn + F4 (Suspend to RAM)
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.It Li 16
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Fn + F5 (Bluetooth)
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.It Li 32
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Fn + F6
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.It Li 64
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Fn + F7 (Screen expand)
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.It Li 128
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Fn + F8
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.It Li 256
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Fn + F9
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.It Li 512
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Fn + F10
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.It Li 1024
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Fn + F11
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.It Li 2048
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Fn + F12 (Suspend to disk)
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.It Li 4096
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Fn + Backspace
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.It Li 8192
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Fn + Insert
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.It Li 16384
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Fn + Delete
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.It Li 32768
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Fn + Home (Brightness up)
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.It Li 65536
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Fn + End (Brightness down)
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.It Li 131072
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Fn + PageUp (ThinkLight)
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.It Li 262144
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Fn + PageDown
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.It Li 524288
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Fn + Space (Zoom)
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.It Li 1048576
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Volume Up
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.It Li 2097152
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Volume Down
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.It Li 4194304
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Mute
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.It Li 8388608
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Access IBM Button
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.El
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.It Va dev.acpi_ibm.0.hotkey
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(read-only)
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Status of several buttons.
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Every time a button is pressed, the respecting bit is toggled.
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It is a bitwise OR of the following:
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.Pp
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.Bl -tag -width indent-two -compact
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.It Li 1
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Home Button
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.It Li 2
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Search Button
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.It Li 4
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Mail Button
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.It Li 8
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Access IBM Button
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.It Li 16
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Zoom
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.It Li 32
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Wireless LAN Button
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.It Li 64
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Video Button
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.It Li 128
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Hibernate Button
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.It Li 256
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ThinkLight Button
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.It Li 512
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Screen Expand
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.It Li 1024
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Brightness Up/Down Button
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.It Li 2048
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Volume Up/Down/Mute Button
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.El
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.It Va dev.acpi_ibm.0.lcd_brightness
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Current brightness level of the display.
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.It Va dev.acpi_ibm.0.volume
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Speaker volume.
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.It Va dev.acpi_ibm.0.mute
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Indicates, whether the speakers are muted or not.
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.It Va dev.acpi_ibm.0.thinklight
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Indicates, whether the ThinkLight keyboard light is activated or not.
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.It Va dev.acpi_ibm.0.bluetooth
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Toggle Bluetooth chip activity.
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.It Va dev.acpi_ibm.0.wlan
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(read-only)
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Indicates whether the WLAN chip is active or not.
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.It Va dev.acpi_ibm.0.fan
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Indicates whether the fan is in automatic (1) or manual (0) mode.
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Default is automatic mode.
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This sysctl should be used with extreme precaution, since disabling automatic
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fan control might overheat the ThinkPad and lead to permanent damage if the
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.Va fan_level
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is not set accordingly.
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.It Va dev.acpi_ibm.0.fan_level
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Indicates at what speed the fan should run when being in manual mode.
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Values are ranging from 0 (off) to 7 (max).
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The resulting speed differs from model to model.
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On a T41p this is as follows:
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.Pp
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.Bl -tag -width indent-two -compact
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.It Li 0
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off
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.It Li 1, 2
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~3000 RPM
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.It Li 3, 4, 5
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~3600 RPM
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.It Li 6, 7
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~4300 RPM
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.El
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.It Va dev.acpi_ibm.0.fan_speed
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(read-only)
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Fan speed in rounds per minute.
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A few older ThinkPads report the fan speed in levels ranging from 0 (off)
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to 7 (max).
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.It Va dev.acpi_ibm.0.thermal
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(read-only)
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Shows the readings of up to eight different temperature sensors.
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Most ThinkPads include six or more temperature sensors but
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only expose the CPU temperature through
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.Xr acpi_thermal 4 .
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Some ThinkPads have the below sensor layout which might vary depending on the
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specific model:
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.Pp
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.Bl -enum -compact
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.It
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CPU
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.It
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Mini PCI Module
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.It
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HDD
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.It
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GPU
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.It
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Built-in battery
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.It
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UltraBay battery
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.It
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Built-in battery
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.It
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UltraBay battery
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.El
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.It Va dev.acpi_ibm.0.handlerevents
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.Xr devd 8
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events handled by
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.Nm
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when
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.Va events
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is set to 1.
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Events are specified as a whitespace-separated list of event code in
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hexadecimal or decimal form.
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Note that the event maybe handled twice (eg. Brightness up/down) if ACPI BIOS
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already handled the event.
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.El
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.Pp
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Defaults for these sysctls can be set in
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.Xr sysctl.conf 5 .
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.Sh FILES
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.Bl -tag -width ".Pa /dev/led/thinklight"
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.It Pa /dev/led/thinklight
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ThinkLight
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.Xr led 4
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device node
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.El
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.Sh EXAMPLES
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The following can be added to
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.Xr devd.conf 5
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in order to pass button events to a
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.Pa /usr/local/sbin/acpi_oem_exec.sh
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script:
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.Bd -literal -offset indent
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notify 10 {
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match "system" "ACPI";
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match "subsystem" "IBM";
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action "/usr/local/sbin/acpi_oem_exec.sh $notify ibm";
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};
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.Ed
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.Pp
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A possible
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.Pa /usr/local/sbin/acpi_oem_exec.sh
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script might look like:
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.Bd -literal -offset indent
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#!/bin/sh
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#
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if [ "$1" = "" -o "$2" = "" ]
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then
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echo "usage: $0 notify oem_name"
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exit 1
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fi
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NOTIFY=`echo $1`
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LOGGER="logger"
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CALC="bc"
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BC_PRECOMMANDS="scale=2"
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ECHO="echo"
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CUT="cut"
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MAX_LCD_BRIGHTNESS=7
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MAX_VOLUME=14
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OEM=$2
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DISPLAY_PIPE=/tmp/acpi_${OEM}_display
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case ${NOTIFY} in
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0x05)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.bluetooth`
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if [ "$LEVEL" = "1" ]
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then
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sysctl dev.acpi_${OEM}.0.bluetooth=0
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MESSAGE="bluetooth disabled"
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else
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sysctl dev.acpi_${OEM}.0.bluetooth=1
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MESSAGE="bluetooth enabled"
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fi
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;;
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0x10|0x11)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.lcd_brightness`
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PERCENT=`${ECHO} "${BC_PRECOMMANDS} ; \\
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${LEVEL} / ${MAX_LCD_BRIGHTNESS} * 100" |\\
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${CALC} | ${CUT} -d . -f 1`
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MESSAGE="brightness level ${PERCENT}%"
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;;
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0x12)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.thinklight`
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if [ "$LEVEL" = "1" ]
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then
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MESSAGE="thinklight enabled"
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else
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MESSAGE="thinklight disabled"
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fi
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;;
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0x15|0x16)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.volume`
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PERCENT=`${ECHO} "${BC_PRECOMMANDS} ; \\
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${LEVEL} / ${MAX_VOLUME} * 100" | \\
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${CALC} | ${CUT} -d . -f 1`
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MESSAGE="volume level ${PERCENT}%"
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;;
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0x17)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.mute`
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if [ "$LEVEL" = "1" ]
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then
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MESSAGE="volume muted"
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else
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MESSAGE="volume unmuted"
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fi
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;;
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*)
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;;
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esac
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${LOGGER} ${MESSAGE}
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if [ -p ${DISPLAY_PIPE} ]
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then
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${ECHO} ${MESSAGE} >> ${DISPLAY_PIPE} &
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fi
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exit 0
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.Ed
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.Pp
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The following example specify that event code 0x04 (Suspend to RAM),
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0x10 (Brightness up) and 0x11 (Brightness down) are handled by
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.Nm .
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.Bd -literal -offset indent
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sysctl dev.acpi_ibm.0.handlerevents='0x04 0x10 0x11'
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.Ed
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.Pp
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in
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.Xr sysctl.conf 5 :
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.Bd -literal -offset indent
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dev.acpi_ibm.0.handlerevents=0x04\\ 0x10\\ 0x11
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.Ed
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.Sh SEE ALSO
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.Xr acpi 4 ,
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.Xr led 4 ,
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.Xr sysctl.conf 5 ,
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.Xr devd 8 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 6.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Takanori Watanabe Aq takawata@FreeBSD.org
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and later mostly rewritten by
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.An Markus Brueffer Aq markus@FreeBSD.org .
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This manual page was written by
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.An Christian Brueffer Aq brueffer@FreeBSD.org
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and
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.An Markus Brueffer Aq markus@FreeBSD.org .
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