/*	$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 */