/*      $NetBSD: pram.c,v 1.25 2020/12/02 14:20:20 wiz Exp $    */

/*-
 * Copyright (C) 1993   Allen K. Briggs, Chris P. Caputo,
 *                      Michael L. Finch, Bradley A. Grantham, and
 *                      Lawrence A. Kesteloot
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Alice Group.
 * 4. The names of the Alice Group or any of its members may not be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 ALICE GROUP 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pram.c,v 1.25 2020/12/02 14:20:20 wiz Exp $");

#include "opt_adb.h"

#include <sys/types.h>
#include <sys/param.h>
#ifdef DEBUG
#include <sys/systm.h>
#endif
#include <machine/viareg.h>

#include <mac68k/mac68k/pram.h>
#include <mac68k/mac68k/macrom.h>
#ifndef MRG_ADB
#include <mac68k/dev/adbvar.h>
#endif

#if DEBUG
static const char *convtime(unsigned long t)
{
        static long daypmon[] =
            { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
        static const char *monstr[] = {
            "January", "February", "March", "April", "May", "June",
            "July", "August", "September", "October", "November", "December"
        };
        static char s[200];
        long year, month, day, hour, minute, seconds, i, dayperyear;

        year = 1904;
        month = 0;      /* Jan */
        day = 1;
        hour = 0;
        minute = 0;
        seconds = 0;

        if (t == 0xffffffff)
                return "<time value is -1>";

        while (t > 0) {
                if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) {
                        dayperyear = 366;
                        daypmon[1] = 29;
                } else {
                        dayperyear = 365;
                        daypmon[1] = 28;
                }
                i = dayperyear * 60 * 60 * 24;
                if (t >= i) {
                        t -= i;
                        year++;
                        continue;
                }
                i = daypmon[month] * 60 * 60 * 24;
                if (t >= i) {
                        t -= i;
                        month++;
                        continue;
                }
                i = 60 * 60 * 24;
                if (t >= i) {
                        t -= i;
                        day++;
                        continue;
                }
                i = 60 * 60;
                if (t >= i) {
                        t -= i;
                        hour++;
                        continue;
                }
                i = 60;
                if (t >= i) {
                        t -= i;
                        minute++;
                        continue;
                }
                seconds = t;
                t = 0;
        }

        snprintf(s, sizeof(s), "%s %ld, %ld   %ld:%ld:%ld",
            monstr[month], day, year, hour, minute, seconds);

        return s;
}
#endif

unsigned long
pram_readtime(void)
{
        unsigned long   timedata;

#ifdef MRG_ADB
        if (0 == jClkNoMem)
                timedata = 0;   /* cause comparison of MacOS boottime */
                                /* and PRAM time to fail */
        else
#endif
        timedata = getPramTime();
#if DEBUG
        printf("time read from PRAM: 0x%lx\n", timedata);
        printf("Date and time: %s\n",convtime(timedata));
#endif

        return timedata;
}

void
pram_settime(unsigned long curtime)
{

#ifdef MRG_ADB
        if (0 == jClkNoMem)
                return;
        else
#endif
        return setPramTime(curtime);
}

#ifndef MRG_ADB
/*
 * These functions are defined here only if we are not using
 * the MRG method of accessing the ADB/PRAM/RTC.
 */

extern int adbHardware; /* from adb_direct.c */

/*
 * getPramTime
 * This function can be called regrardless of the machine
 * type. It calls the correct hardware-specific code.
 * (It's sort of redundant with the above, but it was
 * added later.)
 */
unsigned long
getPramTime(void)
{
        unsigned long curtime;

        switch (adbHardware) {
        case ADB_HW_IOP:
        case ADB_HW_II:         /* access PRAM via VIA interface */
                curtime = (long)getPramTimeII();
                return curtime;

        case ADB_HW_IISI:       /* access PRAM via pseudo-adb functions */
        case ADB_HW_CUDA:
                if (0 != adb_read_date_time(&curtime))
                        return 0;
                else
                        return curtime;

        case ADB_HW_PB:         /* don't know how to access this yet */
                return 0;

        case ADB_HW_UNKNOWN:
        default:
                return 0;
        }
}

/*
 * setPramTime
 * This function can be called regrardless of the machine
 * type. It calls the correct hardware-specific code.
 * (It's sort of redundant with the above, but it was
 * added later.)
 */
void
setPramTime(unsigned long curtime)
{

        switch (adbHardware) {
        case ADB_HW_IOP:
        case ADB_HW_II:         /* access PRAM via ADB interface */
                setPramTimeII(curtime);
                return;

        case ADB_HW_IISI:       /* access PRAM via pseudo-adb functions */
        case ADB_HW_CUDA:
                adb_set_date_time(curtime);
                return;

        case ADB_HW_PB:         /* don't know how to access this yet */
                return;

        case ADB_HW_UNKNOWN:
                return;
        }
}

#endif  /* !MRG_ADB */