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.\" $FreeBSD: src/share/man/man4/man4.i386/acpi_toshiba.4,v 1.7.8.1 2009/04/15 03:14:26 kensmith Exp $
.\"
.Dd November 11, 2009
.Dt ACPI_TOSHIBA 4
.Os
.Sh NAME
.Nm acpi_toshiba
.Nd Toshiba HCI interface
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following line in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device acpi_toshiba"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
acpi_toshiba_load="YES"
.Ed
.Sh DESCRIPTION
HCI is Toshiba's
.Em "Hardware Control Interface"
which is somewhat uniform across their models.
The
.Nm
driver allows the user to manipulate HCI-controlled hardware using a number of
.Xr sysctl 8
variables.
.Sh SYSCTL VARIABLES
The following sysctls are currently implemented:
.Bl -tag -width indent
.It Va hw.acpi.toshiba.force_fan
Causes active cooling to be forcibly enabled
.Pq Ql 1
or disabled
.Pq Ql 0
regardless of the current temperature.
.It Va hw.acpi.toshiba.video_output
Sets the active display to use according to a bitwise OR of the following:
.Pp
.Bl -tag -width indent -compact
.It Li 0
No display
.It Li 1
LCD
.It Li 2
CRT
.It Li 4
TV-Out
.El
.Pp
Only some systems (i.e., the Libretto L5) support video switching via
this hardware-specific driver.
Use the
.Xr acpi_video 4
driver for generic video output support.
.It Va hw.acpi.toshiba.lcd_brightness
Makes the LCD backlight brighter or dimmer (higher values are brighter).
.It Va hw.acpi.toshiba.lcd_backlight
Turns the LCD backlight on and off.
.It Va hw.acpi.toshiba.cpu_speed
Sets the CPU speed to the specified speed.
This provides functionality similar to the
.Va hw.acpi.cpu.throttle_state
variable.
Higher sysctl values mean lower CPU speeds.
.El
.Pp
Defaults for these variables can be set in
.Xr sysctl.conf 5 ,
which is parsed at boot-time.
.Sh LOADER TUNABLES
The
.Va hw.acpi.toshiba.enable_fn_keys
tunable enables or disables the function keys on the keyboard.
Function keys are enabled by default.
.Pp
This behaviour can be changed at the
.Xr loader 8
prompt or in
.Xr loader.conf 5 .
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr acpi_video 4 ,
.Xr loader.conf 5 ,
.Xr sysctl.conf 5 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 5.1 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Hiroyuki Aizu Aq Mt aizu@navi.org .
This manual page was written by
.An Philip Paeps Aq Mt philip@FreeBSD.org .