309 lines
6.6 KiB
C
309 lines
6.6 KiB
C
/* $NetBSD: pow.c,v 1.7 1998/08/04 16:07:53 minoura Exp $ */
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/*
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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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/*
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* Power switch device driver.
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* Useful for
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* 1. accessing boot information.
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* 2. looking at the front or external power switch.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/fcntl.h>
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#include <sys/signalvar.h>
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#include <sys/conf.h>
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#include <machine/powioctl.h>
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#include <x68k/dev/powvar.h>
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#include <x68k/x68k/iodevice.h>
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#include "pow.h"
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#define sramtop (IODEVbase->io_sram)
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#define rtc (IODEVbase->io_rtc)
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struct pow_softc pows[NPOW];
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cdev_decl(pow);
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void powattach __P((int));
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void powintr __P((void));
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static int setalarm __P((struct x68k_alarminfo *));
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static void pow_check_switch __P((void*));
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/* ARGSUSED */
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void
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powattach(num)
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int num;
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{
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int minor;
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int sw;
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sw = ~mfp.gpip & 7;
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mfp.ierb &= ~7; /* disable mfp power switch interrupt */
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mfp.aer &= ~7;
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for (minor = 0; minor < num; minor++) {
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if (minor == 0)
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pows[minor].status = POW_FREE;
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else
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pows[minor].status = POW_ANY;
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pows[minor].sw = sw;
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if (sw) {
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mfp.aer |= sw;
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mfp.ierb |= sw;
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}
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printf("pow%d: started by ", minor);
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if ((sw & POW_ALARMSW) && sramtop[0x26] == 0)
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printf ("RTC alarm.\n");
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else if (sw & POW_EXTERNALSW)
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printf ("external power switch.\n");
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else if (sw & POW_FRONTSW)
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printf ("front power switch.\n");
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else
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printf ("???.\n");
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}
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shutdownhook_establish(pow_check_switch, 0);
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}
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/*ARGSUSED*/
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int
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powopen(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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struct pow_softc *sc = &pows[minor(dev)];
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if (minor(dev) >= NPOW)
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return EXDEV;
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if (sc->status == POW_BUSY)
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return EBUSY;
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sc->pid = 0;
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if (sc->status == POW_FREE)
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sc->status = POW_BUSY;
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sc->rw = (flags & (FREAD|FWRITE));
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return 0;
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}
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/*ARGSUSED*/
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int
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powclose (dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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struct pow_softc *sc = &pows[minor(dev)];
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if (sc->status == POW_BUSY)
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sc->status = POW_FREE;
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sc->pid = 0;
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return 0;
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}
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#define SRAMINT(offset) (*((int*) (&sramtop[offset])))
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#define RTCWAIT DELAY(100)
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static int
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setalarm (bp)
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struct x68k_alarminfo *bp;
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{
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int s = splclock ();
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int ontime;
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sysport.sramwp = 0x31;
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if (bp->al_enable) {
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SRAMINT (0x1e) = bp->al_dowhat;
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SRAMINT (0x22) = bp->al_ontime;
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SRAMINT (0x14) = (bp->al_offtime / 60) - 1;
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sramtop[0x26] = 0;
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} else {
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sramtop[0x26] = 7;
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}
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sysport.sramwp = 0;
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rtc.bank0.mode = 9;
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RTCWAIT;
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rtc.bank1.reset = 5;
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RTCWAIT;
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if (bp->al_enable) {
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ontime = bp->al_ontime;
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if ((ontime & 0x0f) <= 9)
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rtc.bank1.al_min = ontime & 0x0f;
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RTCWAIT;
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ontime >>= 4;
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if ((ontime & 0x0f) <= 6)
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rtc.bank1.al_min10 = ontime & 0x0f;
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RTCWAIT;
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ontime >>= 4;
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if ((ontime & 0x0f) <= 9)
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rtc.bank1.al_hour = ontime & 0x0f;
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RTCWAIT;
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ontime >>= 4;
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if ((ontime & 0x0f) <= 2)
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rtc.bank1.al_hour10 = ontime & 0x0f;
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RTCWAIT;
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ontime >>= 4;
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if ((ontime & 0x0f) <= 9)
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rtc.bank1.al_day = ontime & 0x0f;
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RTCWAIT;
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ontime >>= 4;
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if ((ontime & 0x0f) <= 3)
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rtc.bank1.al_day10 = ontime & 0x0f;
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RTCWAIT;
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ontime >>= 4;
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if ((ontime & 0x0f) <= 6)
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rtc.bank1.al_week = ontime & 0x0f;
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RTCWAIT;
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rtc.bank1.clkout = 0;
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RTCWAIT;
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rtc.bank1.mode = 0x0c;
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} else {
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rtc.bank1.clkout = 7;
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RTCWAIT;
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rtc.bank1.mode = 0x08;
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}
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splx(s);
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return 0;
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}
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/*ARGSUSED*/
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int
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powioctl (dev, cmd, addr, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t addr;
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int flag;
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struct proc *p;
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{
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struct pow_softc *sc = &pows[minor(dev)];
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switch (cmd) {
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case POWIOCGPOWERINFO:
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{
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struct x68k_powerinfo *bp = (struct x68k_powerinfo*)addr;
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if (!(sc->rw & FREAD))
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return EBADF;
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bp->pow_switch_boottime = sc->sw;
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bp->pow_switch_current = ~mfp.gpip & 7;
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bp->pow_boottime = boottime.tv_sec;
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bp->pow_bootcount = SRAMINT (0x44);
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bp->pow_usedtotal = SRAMINT (0x40) * 60;
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}
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break;
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case POWIOCGALARMINFO:
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{
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struct x68k_alarminfo *bp = (struct x68k_alarminfo*) addr;
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if (!(sc->rw & FREAD))
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return EBADF;
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bp->al_enable = (sramtop[0x26] == 0);
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bp->al_ontime = SRAMINT (0x22);
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bp->al_dowhat = SRAMINT (0x1e);
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bp->al_offtime = (SRAMINT (0x14) + 1) * 60;
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}
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break;
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case POWIOCSALARMINFO:
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if (!(sc->rw & FWRITE))
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return EBADF;
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return setalarm ((struct x68k_alarminfo*) addr);
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case POWIOCSSIGNAL:
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if (minor(dev) != 0)
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return EOPNOTSUPP;
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if (!(sc->rw & FWRITE))
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return EBADF;
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{
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int signum = *(int*) addr;
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if (signum <= 0 || signum > 31)
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return EINVAL;
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sc->signum = signum;
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sc->proc = p;
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sc->pid = p->p_pid;
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}
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break;
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default:
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return EINVAL;
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}
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return 0;
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}
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void
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powintr()
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{
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int sw;
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int s;
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s = spl6();
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sw = ~mfp.gpip & 6;
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mfp.aer &= ~sw;
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mfp.ierb |= sw;
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if (pows[0].status == POW_BUSY && pows[0].pid != 0)
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psignal(pows[0].proc, pows[0].signum);
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splx(s);
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}
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static void
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pow_check_switch(dummy)
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void *dummy;
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{
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extern int power_switch_is_off;
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if ((~mfp.gpip & (POW_FRONTSW | POW_EXTERNALSW)) == 0)
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power_switch_is_off = 1;
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}
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