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-.\"     $OpenBSD: tctrl.4,v 1.12 2016/02/27 20:57:32 natano Exp $
-.\"
-.\" Copyright (c) 1999 Jason L. Wright (jason@thought.net)
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-.\" DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-.\" POSSIBILITY OF SUCH DAMAGE.
-.\"
-.\" APM description:
-.\"
-.\"	Copyright (c) 1998 Marco S. Hyman
-.\"
-.\"	Permission to copy all or part of this material for any purpose is
-.\"	granted provided that the above copyright notice and this paragraph
-.\"	are duplicated in all copies.  THIS SOFTWARE IS PROVIDED ``AS IS''
-.\"	AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
-.\"	LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-.\"	FOR A PARTICULAR PURPOSE.
-.Dd $Mdocdate: February 27 2016 $
-.Dt TCTRL 4 sparc
-.Os
-.Sh NAME
-.Nm tctrl
-.Nd Tadpole Microcontroller Interface
-.Sh SYNOPSIS
-.Cd "tctrl0 at obio0"
-.Sh DESCRIPTION
-The
-.Nm
-driver provides control over many functions on the
-.Tn Tadpole SPARCbook
-3 series laptops, via their TS102 chip.
-.Pp
-The microcontroller is used to power the TFT display down when the
-laptop lid is closed and when the screen is blanked by the
-.Xr pninek 4
-or
-.Xr pnozz 4
-driver.
-The
-.Nm tctrl
-is also used to power the laptop off when the
-.Xr reboot 2
-system call is used with the
-.Ar RB_POWERDOWN
-flag is set.
-.Pp
-The PCMCIA part of the controller is managed by the
-.Xr tslot 4
-driver.
-.Sh POWER MANAGEMENT INTERFACE
-The
-.Nm
-driver provides an interface which simulates the Advanced Power Management
-.Pq Tn APM
-BIOS functions encountered on some x86 hardware.
-The BIOS functions are translated into the appropriate microcontroller requests.
-Currently only battery level, AC connection, and charging status are available
-from the
-.Nm
-device.
-Suspend/resume and other power events are not yet supported.
-.Pp
-The
-.Nm
-driver implements the following
-.Xr ioctl 2
-calls.
-They are defined in
-.In machine/apmvar.h .
-.Bl -tag -width Ds
-.\" .It Dv APM_IOC_STANDBY
-.\" .Em NOT YET SUPPORTED on sparc
-.\" .Pq Li "no parameters"
-.\" Request
-.\" .Dq standby
-.\" mode.
-.\" .It Dv APM_IOC_SUSPEND
-.\" .Em NOT YET SUPPORTED on sparc
-.\" .Pq Li "no parameters"
-.\" Request
-.\" .Dq suspend
-.\" mode.
-.\" .It Dv APM_IOC_HIBERNATE
-.\" .Em NOT YET SUPPORTED on sparc
-.\" .Pq Li "no parameters"
-.\" Request
-.\" .Dq hibernate
-.\" mode.
-.It Dv APM_IOC_GETPOWER
-.Pq Li "struct apm_power_info"
-Request the current power state.
-The argument structure is as follows:
-.Bd -literal -offset indent
-struct apm_power_info {
-	u_char battery_state;
-	u_char ac_state;
-	u_char battery_life;
-	u_char spare1;
-	u_int minutes_left;
-	u_int spare2[6];
-};
-.Ed
-.Pp
-The following values are defined for
-.Va battery_state :
-.Bl -tag -width Ds
-.It Dv APM_BATT_HIGH
-Battery has a high state of charge.
-.It Dv APM_BATT_LOW
-Battery has a low state of charge.
-.It Dv APM_BATT_CRITICAL
-Battery has a critical state of charge.
-.It Dv APM_BATT_CHARGING
-Battery is not high, low, or critical and is currently charging.
-.It Dv APM_BATT_UNKNOWN
-Cannot read the current battery state.
-.It Dv APM_BATTERY_ABSENT
-No battery installed.
-.El
-.Pp
-The following values are defined for
-.Va ac_state :
-.Bl -tag -width Ds
-.It Dv APM_AC_OFF
-External power not detected.
-.It Dv APM_AC_ON
-External power detected.
-.\" .It Dv APM_AC_BACKUP
-.\" Backup power in use.
-.\" .It Dv APM_AC_UNKNOWN
-.\" External power state unknown.
-.El
-.Pp
-The
-.Va battery_life
-value contains the estimated percentage of battery life available.
-100% indicates a full charge.
-.Pp
-The
-.Va minutes_left
-value is always -1,
-as the hardware does not provide an estimated number of minutes of
-battery life remaining.
-.\" .It Dv APM_IOC_NEXTEVENT
-.\" .Em NOT YET SUPPORTED on sparc
-.\" .Pq Li "struct apm_event_info"
-.\" The
-.\" .Tn APM
-.\" driver stores up to
-.\" .Dv APM_NEVENTS
-.\" events.
-.\" This was defined as 16 at the time this documentation was written.
-.\" If the event list is full when a new event is detected the new event is lost.
-.\" .Dv APM_IOC_NEXTEVENT
-.\" ioctl returns the next event on the list or
-.\" .Er EAGAIN
-.\" if the event list is empty.
-.\" The format of the returned event is:
-.\" .Bd -literal -offset indent
-.\" struct apm_event_info {
-.\"	u_int type;
-.\"	u_int index;
-.\"	u_int spare[8];
-.\" };
-.\" .Ed
-.\" where
-.\" .Va index
-.\" is a sequential count of events that can be used to check if any
-.\" events were lost and
-.\" .Va type
-.\" is one of:
-.\" .Pp
-.\" .Bl -tag -width Ds -offset indent -compact
-.\" .It Dv APM_STANDBY_REQ
-.\" .It Dv APM_SUSPEND_REQ
-.\" .It Dv APM_NORMAL_RESUME
-.\" .It Dv APM_CRIT_RESUME
-.\" .It Dv APM_BATTERY_LOW
-.\" .It Dv APM_POWER_CHANGE
-.\" .It Dv APM_UPDATE_TIME
-.\" .It Dv APM_CRIT_SUSPEND_REQ
-.\" .It Dv APM_USER_STANDBY_REQ
-.\" .It Dv APM_USER_SUSPEND_REQ
-.\" .It Dv APM_SYS_STANDBY_RESUME
-.\" .El
-.\" .It Dv APM_IOC_DEV_CTL
-.\" .Em NOT YET SUPPORTED on sparc
-.\" .Pq Li "struct apm_ctl"
-.\" Allows an application to directly set the
-.\" .Tm APM
-.\" operating mode.
-.\" The argument structure is as follows:
-.\" .Bd -literal -offset indent
-.\" struct apm_ctl {
-.\"	u_int dev;
-.\"	u_int mode;
-.\" };
-.\" .Ed
-.\" .Pp
-.\" .Va dev
-.\" indicates the device, typically
-.\" .Dv APM_DEV_ALLDEVS .
-.\" .Pp
-.\" .Va mode
-.\" indicates the desired operating mode.
-.\" Possible values are
-.\" .Bl -tag -compact -offset indent
-.\" .It Dv APM_SYS_READY
-.\" .It Dv APM_SYS_STANDBY
-.\" .It Dv APM_SYS_SUSPEND
-.\" .It Dv APM_SYS_OFF
-.\" .It Dv APM_LASTREQ_INPROG
-.\" .It Dv APM_LASTREQ_REJECTED
-.\" .El
-.It Dv APM_IOC_PRN_CTL
-.Pq Li "int"
-This
-.Xr ioctl 2
-controls message output by the
-.Nm
-driver when a power change event is detected.
-The integer parameter is one of:
-.Bl -tag -width Ds
-.It Dv APM_PRINT_ON
-All power change events result in a message.
-This is the normal operating mode for the driver.
-.It Dv APM_PRINT_OFF
-Power change event messages are suppressed.
-.It Dv APM_PRINT_PCT
-Power change event messages are suppressed unless the estimated
-battery life percentage changes.
-.El
-.\" .Pp
-.\" However, in no case will power status messages be displayed until the
-.\" battery life goes below the percentage in the
-.\" .Xr sysctl 8
-.\" state variable
-.\" .Dv machdep.apmwarn .
-.\" Setting
-.\" .Dv machdep.apmwarn
-.\" to zero disables all warnings regardless of the
-.\" .Dv APM_IOC_PRN_CTL
-.\" setting.
-.El
-.Sh FILES
-.Bl -tag -width /dev/apmctl
-.It Pa /dev/apm
-APM data device.
-May only be opened read-only.
-May be opened by multiple concurrent users.
-.It Pa /dev/apmctl
-APM control device.
-May be opened read-write or write-only.
-May only be opened by one user at a time.
-An attempt to open the file when in use will fail, returning
-.Er EBUSY .
-.El
-.Sh SEE ALSO
-.Xr reboot 2 ,
-.Xr intro 4 ,
-.Xr pninek 4 ,
-.Xr pnozz 4 ,
-.Xr tslot 4 ,
-.Xr apm 8 ,
-.Xr apmd 8
-.Sh BUGS
-Not all power management functions of the microcontroller are supported.