1.\" $OpenBSD: aps.4,v 1.10 2013/07/16 16:05:48 schwarze Exp $ 2.\" 3.\" Copyright (c) 2005 Jonathan Gray <jsg@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: July 16 2013 $ 18.Dt APS 4 19.Os 20.Sh NAME 21.Nm aps 22.Nd ThinkPad Active Protection System accelerometer 23.Sh SYNOPSIS 24.Cd "aps0 at isa? port 0x1600" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for several sensors found in some ThinkPad laptops. 29.Pp 30The sensors currently exposed via the 31.Xr sysctl 8 32interface are: 33.Bl -column "Keyboard Active" "Unknown" "Typical Use" -offset indent 34.It Sy "Sensor" Ta Sy "Units" Ta Sy "Typical Use" 35.It Li "X_ACCEL" Ta "Unknown" Ta "X Acceleration" 36.It Li "Y_ACCEL" Ta "Unknown" Ta "Y Acceleration" 37.It Li "X_VAR" Ta "Unknown" Ta "Weighted X Acceleration?" 38.It Li "Y_VAR" Ta "Unknown" Ta "Weighted Y Acceleration?" 39.It Li "Temp1" Ta "uK" Ta "Unknown" 40.It Li "Temp2" Ta "uK" Ta "Unknown" 41.It Li "Keyboard Active" Ta "boolean" Ta "Keyboard activity" 42.It Li "Mouse Active" Ta "boolean" Ta "Mouse activity" 43.It Li "Lid Open" Ta "boolean" Ta "Lid state" 44.El 45.Sh SEE ALSO 46.Xr isa 4 , 47.Xr sensorsd 8 , 48.Xr sysctl 8 49.Sh HISTORY 50The 51.Nm 52driver first appeared in 53.Ox 3.8 . 54.Sh AUTHORS 55The 56.Nm 57driver was written by 58.An Jonathan Gray Aq Mt jsg@openbsd.org . 59.Sh CAVEATS 60The 61.Nm 62driver does not yet maintain state and subsequently does not take 63evasive action when it thinks the hard drive is in danger. 64.Pp 65The Y axis on X40 and possibly other models seems to be inverted. 66It is unknown how to distinguish between different versions of the 67accelerometer to compensate for this in the driver at this time. 68.Pp 69As IBM provides no documentation, it is not known what all the available 70sensors are used for. 71