acpi_hp man page on FreeBSD

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ACPI_HP(4)	       BSD/i386 Kernel Interfaces Manual	    ACPI_HP(4)

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.conf(5):

	   acpi_hp_load="YES"

DESCRIPTION
     The acpi_hp 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) Events
     Devd events received by devd(8) provide the following information:

	   system     "ACPI"
	   subsystem  "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) Device
     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.conf(5).

HARDWARE
     The acpi_hp driver has been reported to support the following hardware:

     ·	 HP Compaq 8510p
     ·	 HP Compaq nx7300

     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.conf(5) 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_wmi(4), sysctl.conf(5), devd(8), devfs(8), sysctl(8)

HISTORY
     The acpi_hp device driver first appeared in FreeBSD CURRENT.

AUTHORS
     The acpi_hp driver was written by Michael Gmelin ⟨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 Michael Gmelin ⟨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 set‐
     tings are not supported.

BSD				 June 30, 2009				   BSD
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