180 lines
5.2 KiB
Groff
180 lines
5.2 KiB
Groff
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.\" Copyright (c) 1995 MINOURA Makoto.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Minoura Makoto.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd July 2, 1995
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.Os
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.Dt pow 4
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.Sh NAME
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.Nm pow
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.Nd "X68k power switch device"
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.Sh DESCRIPTION
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Files
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.Pa /dev/pow
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and
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.Pa /dev/pow1
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are devices used to access the x68k power switch / bootstrap information and
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the RTC alarm timer. The following operations are allowed using
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.Xr ioctl 2
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system call:
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.Bl -tag -width POWIOCGPOWERINFO -compact -offset indent
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.It POWIOGPOWERINFO
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Getting power switch status
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.It POWIOGALARMINFO
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Getting RTC alarm timer status
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.It POWIOSALARMINFO
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Setting RTC alarm timer
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.It POWIOSSIGNAL
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Setting signal number which is sent at changing the power status
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.El
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.Sh GETTING POWER SWITCH STATUS
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.Bd -literal
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.Fd #include <sys/ioctl.h>
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.Fd #include <machine/powioctl.h>
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.Fd ioctl (fd, POWIOCGPOWERINFO, &powerinfo);
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.Fd struct x68k_powerinfo powerinfo;
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.Ed
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.Pp
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Returns the power switch status etc. in the following structure.
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.Bd -literal -offset indent
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struct x68k_powerinfo {
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int pow_switch_boottime;
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int pow_switch_current;
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time_t pow_boottime;
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unsigned int pow_bootcount;
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time_t pow_usedtotal;
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};
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.Ed
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.Pp
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Each member means:
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.Bl -hang -compact
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.It pow_switch_boottime:
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The power switch status at the system start time.
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The status is known by applying logical and (&) with:
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.Bl -tag -compact -width POW_EXTERNALSW
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.It POW_ALARMSW
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True if the system started by the RTC alarm timer
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.It POW_EXTERNALSW
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True if the EXPWON signal of the I/O slot is on
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.It POW_FRONTSW
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True if the front power switch is on
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.El
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EXPWON-related information is not tested.
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.It pow_switch_current:
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Current power switch status. See above.
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.It pow_boottime:
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The time when NetBSD started.
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.It pow_bootcount:
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.It pow_usedtotal:
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Host's boot information from the system memory switch.
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Total usage in count (pow_bootcount) and second (pow_usedtotal).
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.El
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.Sh ACCESSING RTC ALARM TIMER
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.Bd -literal
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.Fd #include <sys/ioctl.h>
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.Fd #include <machine/powioctl.h>
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.Fd ioctl (fd, POWIOCGALARMINFO, &alarminfo);
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.Fd struct x68k_alarminfo alarminfo;
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.Ed
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.Pp
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Returns x68k's alarm timer information in the following structure.
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.Bd -literal -offset indent
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struct x68k_alarminfo {
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int al_enable;
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unsigned int al_ontime;
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int al_dowhat;
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time_t al_offtime;
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};
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.Ed
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.Pp
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Each of the members means:
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.Bl -hang
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.It al_enable:
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True if the alarm timer is enable.
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.It al_ontime:
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Internal expression of the alarm timer. See `C Compiler PRO-68K Programmers' Manual'
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Chapter 3 Section ALARMSET.
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.It al_dowhat:
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What to do when started by the alarm timer.
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See `Programers' manual'.
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.It al_offtime:
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Display the time in seconds since the alarm is activated until
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the power is turned off (though the resolution
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is resolved to minutes). Be cautious when using IOCS
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and the like as these require minute time units. 0 indicates an infinity.
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.El
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.Bd -literal
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.Fd ioctl (fd, POWIOCSALARMINFO, &alarminfo);
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.Fd struct x68k_alarminfo alarminfo;
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.Ed
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.Pp
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Sets the alarm timer according to the argument
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.Ar alarminfo
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(see above).
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.Pp
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.Sh SIGNAL
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.Bd -literal
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.Fd #include <sys/ioctl.h>
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.Fd #include <machine/powioctl.h>
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.Fd ioctl (fd, POWIOCSSIGNAL, &signum);
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.Fd int signum;
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.Ed
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.Pp
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Signal
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.Ar signum
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is sent when the state of the power switch
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(front or external) changes. It becomes invalid when
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.Xr close 2
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is called.
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Note that this function is not provided with
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.Pa /dev/pow1 .
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.Sh SEE ALSO
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.Xr ioctl 2 ,
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.Xr poffd 8 ,
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.Xr rtcalarm 8
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.Rs
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`C Compiler PRO-68K Programmers' Manual', Chapter 3 IOCS Calls, Section ALARMSET, Sharp
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.Re
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.Sh AUTHOR
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Minoura Makoto <minoura@flab.fujitsu.co.jp>.
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.Sh SPECIAL THANKS
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Liam Hahne Minn <hahne@sail.t.u-tokyo.ac.jp>.
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.Sh BUGS
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The file
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.Pa /dev/pow
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can only be opened by one process at a time.
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