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acpi_hp.4freebsd

Langue: en

Version: 361829 (ubuntu - 24/10/10)

Section: 4 (Pilotes et protocoles réseau)


BSD mandoc

NAME

acpi_hp - ACPI extras driver for HP laptops

SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:
device acpi_hp

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

 acpi_hp_load="YES"
 

DESCRIPTION

The driver provides support for ACPI-controlled features found on HP laptops that use a WMI enabled BIOS (e.g. HP Compaq 8510p and 6510p).

The main purpose of this driver is to provide an interface, accessible via sysctl(8), devd(8)and devfs(8), through which applications can determine and change the status of various laptop components and BIOS settings.

devd(8)SsEvents

Devd events received by devd(8) provide the following information:
system
Qq Li ACPI
subsystem
Qq Li HP
type
The source of the event in the ACPI namespace. The value depends on the model.
notify
Event code (see below).

Event codes:

0xc0
WLAN on air status changed to 0 (not on air)
0xc1
WLAN on air status changed to 1 (on air)
0xd0
Bluetooth on air status changed to 0 (not on air)
0xd1
Bluetooth on air status changed to 1 (on air)
0xe0
WWAN on air status changed to 0 (not on air)
0xe1
WWAN on air status changed to 1 (on air)

devfs(8)SsDevice

You can read /dev/hpcmi to see your current BIOS settings. The detail level can be adjusted by setting the sysctl cmi_detail as described below.

SYSCTL VARIABLES

The following sysctls are currently implemented:

WLAN:

dev.acpi_hp.0.wlan_enabled
Toggle WLAN chip activity.
dev.acpi_hp.0.wlan_radio
(read-only) WLAN radio status (controlled by hardware switch)
dev.acpi_hp.0.wlan_on_air
(read-only) WLAN on air (chip enabled, hardware switch enabled + enabled in BIOS)
dev.acpi_hp.0.wlan_enabled_if_radio_on
If set to 1, the WLAN chip will be enabled if the radio is turned on
dev.acpi_hp.0.wlan_disable_if_radio_off
If set to 1, the WLAN chip will be disabled if the radio is turned off

Bluetooth:

dev.acpi_hp.0.bt_enabled
Toggle Bluetooth chip activity.
dev.acpi_hp.0.bt_radio
(read-only) Bluetooth radio status (controlled by hardware switch)
dev.acpi_hp.0.bt_on_air
(read-only) Bluetooth on air (chip enabled, hardware switch enabled + enabled in BIOS)
dev.acpi_hp.0.bt_enabled_if_radio_on
If set to 1, the Bluetooth chip will be enabled if the radio is turned on
dev.acpi_hp.0.bt_disable_if_radio_off
If set to 1, the Bluetooth chip will be disabled if the radio is turned off

WWAN:

dev.acpi_hp.0.wwan_enabled
Toggle WWAN chip activity.
dev.acpi_hp.0.wwan_radio
(read-only) WWAN radio status (controlled by hardware switch)
dev.acpi_hp.0.wwan_on_air
(read-only) WWAN on air (chip enabled, hardware switch enabled + enabled in BIOS)
dev.acpi_hp.0.wwan_enabled_if_radio_on
If set to 1, the WWAN chip will be enabled if the radio is turned on
dev.acpi_hp.0.wwan_disable_if_radio_off
If set to 1, the WWAN chip will be disabled if the radio is turned off

Misc:

dev.acpi_hp.0.als_enabled
Toggle ambient light sensor (ALS)
dev.acpi_hp.0.display
(read-only) Display status (bitmask)
dev.acpi_hp.0.hdd_temperature
(read-only) HDD temperature
dev.acpi_hp.0.is_docked
(read-only) Docking station status (1 if docked)
dev.acpi_hp.0.cmi_detail
Bitmask to control detail level in /dev/hpcmi output (values can be ORed).
0x01
Show path component of BIOS setting
0x02
Show a list of valid options for the BIOS setting
0x04
Show additional flags of BIOS setting (ReadOnly etc.)
0x08
Query highest BIOS entry instance. This is broken on many HP models and therefore disabled by default.
dev.acpi_hp.0.verbose
(read-only) Set verbosity level

Defaults for these sysctls can be set in sysctl.conf5.

HARDWARE

The driver has been reported to support the following hardware:

It should work on most HP laptops that feature a WMI enabled BIOS.

FILES

/dev/hpcmi
Interface to read BIOS settings

EXAMPLES

The following can be added to devd.conf5 in order disable the LAN interface when WLAN on air and reenable if it's not:
 notify 0 {
         match "system"          "ACPI";
         match "subsystem"       "HP";
         match "notify"          "0xc0";
         action                  "ifconfig em0 up";
 };
 
 notify 0 {
         match "system"          "ACPI";
         match "subsystem"       "HP";
         match "notify"          "0xc1";
         action                  "ifconfig em0 down";
 };
 

Enable the ambient light sensor:

 sysctl dev.acpi_hp.0.als_enabled=1
 

Enable Bluetooth:

 sysctl dev.acpi_hp.0.bt_enabled=1
 

Get BIOS settings:

 cat /dev/hpcmi
 
 Serial Port                                Disable              
 Infrared Port                              Enable               
 Parallel Port                              Disable              
 Flash Media Reader                         Disable              
 USB Ports including Express Card slot      Enable               
 1394 Port                                  Enable               
 Cardbus Slot                               Disable              
 Express Card Slot                          Disable   
 (...)
 

Set maximum detail level for /dev/hpcmi output:

 sysctl dev.acpi_hp.0.cmi_detail=7
 

SEE ALSO

acpi(4), acpi_wmi4, sysctl.conf5, devd(8), devfs(8), sysctl(8)

HISTORY

The device driver first appeared in Fx CURRENT .

AUTHORS

An -nosplit The driver was written by An Michael Gmelin Aq freebsd@grem.de

It has been inspired by hp-wmi driver, which implements a subset of these features (hotkeys) on Linux.

HP CMI whitepaper:
http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
wmi-hp for Linux:
http://www.kernel.org
WMI and ACPI:
http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx

This manual page was written by An Michael Gmelin Aq freebsd@grem.de

BUGS

This driver is experimental and has only been tested on CURRENT i386 on an HP Compaq 8510p which featured all supported wireless devices (WWAN/BT/WLAN). Expect undefined results when operating on different hardware.

Loading the driver is slow. Reading from /dev/hpcmi is even slower.

Additional features like HP specific sensor readings or writing BIOS settings are not supported.

Le language : "A l'an 3000 les gens vont se parler avec,..., les yeux,
des ondes. Ne me prend pas pour un fou les baleines le font, les
dauphins aussi. Ce sont des animaux très intelligents dans la mer. Nous
on vit dans la terre. Et eux se communiquent, vu qu'ils ne savent pas
parler dans l'eau, ils sont forcés d'utiliser des ondes, des ondes de
love ou de hate et la communication se fait comme ça."
-+- Jean-Claude VanDamme -+-