290 lines
8.2 KiB
Groff
290 lines
8.2 KiB
Groff
.\" Copyright (c) 2009 Michael Gmelin
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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 19, 2015
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.Dt ACPI_HP 4
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.Os
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.Sh NAME
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.Nm acpi_hp
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.Nd "ACPI extras driver for HP 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_hp"
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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_hp_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 ACPI-controlled features found on HP laptops
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that use a WMI enabled BIOS (e.g., HP Compaq 8510p and 6510p).
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.Pp
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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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.Xr devd 8 and
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.Xr devfs 8 ,
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through which applications can determine and change the status of
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various laptop components and BIOS settings.
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.Pp
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.Ss Xr devd 8 Events
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Devd 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 HP
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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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Event codes:
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.Pp
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.Bl -tag -width "0xc0" -offset indent -compact
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.It Li 0xc0
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WLAN on air status changed to 0 (not on air)
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.It Li 0xc1
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WLAN on air status changed to 1 (on air)
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.It Li 0xd0
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Bluetooth on air status changed to 0 (not on air)
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.It Li 0xd1
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Bluetooth on air status changed to 1 (on air)
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.It Li 0xe0
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WWAN on air status changed to 0 (not on air)
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.It Li 0xe1
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WWAN on air status changed to 1 (on air)
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.El
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.Ss Xr devfs 8 Device
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You can read /dev/hpcmi to see your current BIOS settings.
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The detail level can be adjusted by setting the sysctl
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.Va cmi_detail
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as described below.
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.Sh SYSCTL VARIABLES
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The following sysctls are currently implemented:
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.Ss WLAN:
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.Bl -tag -width indent
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.It Va dev.acpi_hp.0.wlan_enabled
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Toggle WLAN chip activity.
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.It Va dev.acpi_hp.0.wlan_radio
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(read-only)
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WLAN radio status (controlled by hardware switch)
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.It Va dev.acpi_hp.0.wlan_on_air
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(read-only)
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WLAN on air (chip enabled, hardware switch enabled + enabled in BIOS)
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.It Va dev.acpi_hp.0.wlan_enabled_if_radio_on
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If set to 1, the WLAN chip will be enabled if the radio is turned on
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.It Va dev.acpi_hp.0.wlan_disable_if_radio_off
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If set to 1, the WLAN chip will be disabled if the radio is turned off
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.El
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.Ss Bluetooth:
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.Bl -tag -width indent
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.It Va dev.acpi_hp.0.bt_enabled
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Toggle Bluetooth chip activity.
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.It Va dev.acpi_hp.0.bt_radio
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(read-only)
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Bluetooth radio status (controlled by hardware switch)
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.It Va dev.acpi_hp.0.bt_on_air
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(read-only)
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Bluetooth on air (chip enabled, hardware switch enabled + enabled in BIOS)
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.It Va dev.acpi_hp.0.bt_enabled_if_radio_on
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If set to 1, the Bluetooth chip will be enabled if the radio is turned on
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.It Va dev.acpi_hp.0.bt_disable_if_radio_off
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If set to 1, the Bluetooth chip will be disabled if the radio is turned off
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.El
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.Ss WWAN:
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.Bl -tag -width indent
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.It Va dev.acpi_hp.0.wwan_enabled
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Toggle WWAN chip activity.
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.It Va dev.acpi_hp.0.wwan_radio
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(read-only)
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WWAN radio status (controlled by hardware switch)
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.It Va dev.acpi_hp.0.wwan_on_air
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(read-only)
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WWAN on air (chip enabled, hardware switch enabled + enabled in BIOS)
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.It Va dev.acpi_hp.0.wwan_enabled_if_radio_on
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If set to 1, the WWAN chip will be enabled if the radio is turned on
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.It Va dev.acpi_hp.0.wwan_disable_if_radio_off
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If set to 1, the WWAN chip will be disabled if the radio is turned off
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.El
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.Ss Misc:
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.Bl -tag -width indent
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.It Va dev.acpi_hp.0.als_enabled
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Toggle ambient light sensor (ALS)
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.It Va dev.acpi_hp.0.display
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(read-only)
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Display status (bitmask)
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.It Va dev.acpi_hp.0.hdd_temperature
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(read-only)
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HDD temperature
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.It Va dev.acpi_hp.0.is_docked
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(read-only)
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Docking station status (1 if docked)
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.It Va dev.acpi_hp.0.cmi_detail
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Bitmask to control detail level in /dev/hpcmi output (values can be ORed).
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.Bl -tag -width "0x01" -offset indent -compact
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.It Li 0x01
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Show path component of BIOS setting
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.It Li 0x02
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Show a list of valid options for the BIOS setting
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.It Li 0x04
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Show additional flags of BIOS setting (ReadOnly etc.)
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.It Li 0x08
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Query highest BIOS entry instance.
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This is broken on many HP models and therefore disabled by default.
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.El
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.It Va dev.acpi_hp.0.verbose
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(read-only)
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Set verbosity level
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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 HARDWARE
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The
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.Nm
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driver has been reported to support the following hardware:
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.Pp
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.Bl -bullet -compact
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.It
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HP Compaq 8510p
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.It
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HP Compaq nx7300
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.El
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.Pp
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It should work on most HP laptops that feature a WMI enabled BIOS.
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.Sh FILES
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.Bl -tag -width ".Pa /dev/hpcmi"
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.It Pa /dev/hpcmi
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Interface to read BIOS settings
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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 disable the LAN interface when WLAN on air and reenable if it is not:
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.Bd -literal -offset indent
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notify 0 {
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match "system" "ACPI";
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match "subsystem" "HP";
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match "notify" "0xc0";
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action "ifconfig em0 up";
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};
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notify 0 {
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match "system" "ACPI";
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match "subsystem" "HP";
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match "notify" "0xc1";
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action "ifconfig em0 down";
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};
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.Ed
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.Pp
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Enable the ambient light sensor:
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.Bd -literal -offset indent
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sysctl dev.acpi_hp.0.als_enabled=1
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.Ed
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.Pp
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Enable Bluetooth:
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.Bd -literal -offset indent
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sysctl dev.acpi_hp.0.bt_enabled=1
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.Ed
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.Pp
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Get BIOS settings:
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.Bd -literal -offset indent
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cat /dev/hpcmi
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Serial Port Disable
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Infrared Port Enable
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Parallel Port Disable
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Flash Media Reader Disable
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USB Ports including Express Card slot Enable
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1394 Port Enable
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Cardbus Slot Disable
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Express Card Slot Disable
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(...)
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.Ed
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.Pp
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Set maximum detail level for /dev/hpcmi output:
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.Bd -literal -offset indent
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sysctl dev.acpi_hp.0.cmi_detail=7
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.Ed
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.Sh SEE ALSO
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.Xr acpi 4 ,
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.Xr acpi_wmi 4 ,
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.Xr sysctl.conf 5 ,
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.Xr devd 8 ,
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.Xr devfs 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 8.0 .
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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 Michael Gmelin Aq Mt freebsd@grem.de .
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.Pp
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It has been inspired by hp-wmi driver, which implements a subset of these
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features (hotkeys) on Linux.
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.Bl -tag -width indent
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.It HP CMI whitepaper:
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http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
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.It wmi-hp for Linux:
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http://www.kernel.org
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.It WMI and ACPI:
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http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
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.El
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.Pp
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This manual page was written by
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.An Michael Gmelin Aq Mt freebsd@grem.de .
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.Sh BUGS
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This driver is experimental and has only been tested on i386 on an
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HP Compaq 8510p which featured all supported wireless devices (WWAN/BT/WLAN).
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Expect undefined results when operating on different hardware.
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.Pp
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Loading the driver is slow.
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Reading from
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.Pa /dev/hpcmi
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is even slower.
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.Pp
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Additional features like HP specific sensor readings or writing BIOS
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settings are not supported.
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