1.\" $NetBSD: aps.4,v 1.2 2007/09/11 22:27:04 wiz Exp $ 2.\" $OpenBSD: aps.4,v 1.7 2007/05/31 19:19:49 jmc Exp $ 3.\" 4.\" Copyright (c) 2005 Jonathan Gray <jsg@openbsd.org> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd September 11, 2007 19.Dt APS 4 20.Os 21.Sh NAME 22.Nm aps 23.Nd ThinkPad Active Protection System accelerometer 24.Sh SYNOPSIS 25.Cd "aps0 at isa? port 0x1600" 26.Sh DESCRIPTION 27The 28.Nm 29driver provides support for several sensors found in some ThinkPad laptops. 30.Pp 31The sensors currently exposed via the 32.Xr envsys 4 33interface are: 34.Bl -column "Sensor " "Units" "Typical" -offset indent 35.It Sy "Sensor" Ta Sy "Units" Ta Sy "Typical Use" 36.It Li "X_ACCEL" Ta "Integer" Ta "X Acceleration" 37.It Li "Y_ACCEL" Ta "Integer" Ta "Y Acceleration" 38.It Li "X_VAR" Ta "Integer" Ta "Weighted X Acceleration?" 39.It Li "Y_VAR" Ta "Integer" Ta "Weighted Y Acceleration?" 40.It Li "Temp1" Ta "uK" Ta "Unknown" 41.It Li "Temp2" Ta "uK" Ta "Unknown" 42.It Li "Keyboard Active" Ta "Boolean" Ta "Keyboard activity" 43.It Li "Mouse Active" Ta "Boolean" Ta "Mouse activity" 44.It Li "Lid Open" Ta "Boolean" Ta "Lid state" 45.El 46.Sh SEE ALSO 47.Xr envsys 4 , 48.Xr envstat 8 49.Sh HISTORY 50The 51.Nm 52driver first appeared in 53.Ox 3.8 54and then was ported to 55.Nx 565.0. 57.Sh AUTHORS 58The 59.Nm 60driver was written by 61.An Jonathan Gray Aq jsg@openbsd.org . 62.Sh CAVEATS 63The 64.Nm 65driver does not yet maintain state and subsequently does not take 66evasive action when it thinks the hard drive is in danger. 67.Pp 68The Y axis on X40 and possibly other models seems to be inverted. 69It is unknown how to distinguish between different versions of the 70accelerometer to compensate for this in the driver at this time. 71.Pp 72As IBM provides no documentation, it is not known what all the available 73sensors are used for. 74