/*      $NetBSD: clock.c,v 1.11 2014/11/20 16:34:25 christos Exp $ */

#include <sys/types.h>
#include <dev/clock_subr.h>
#include <machine/prom.h>

#include <lib/libsa/stand.h>
#include <lib/libsa/net.h>
#include "libsa.h"

/*
 * BCD to decimal and decimal to BCD.
 */
#define YEAR0           68

/*
 * This code is defunct after 2068.
 * Will Unix still be here then??
 */
const short dayyr[12] =
    {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};

u_long
chiptotime(int sec, int min, int hour, int day, int mon, int year)
{
        int days, yr;

        sec = bcdtobin(sec);
        min = bcdtobin(min);
        hour = bcdtobin(hour);
        day = bcdtobin(day);
        mon = bcdtobin(mon);
        year = bcdtobin(year) + YEAR0;
        if (year < 70)
                year = 70;

        /* simple sanity checks */
        if (year < 70 || mon < 1 || mon > 12 || day < 1 || day > 31)
                return (0);
        days = 0;
        for (yr = 70; yr < year; yr++)
                days += days_per_year(yr);
        days += dayyr[mon - 1] + day - 1;
        if (is_leap_year(yr) && mon > 2)
                days++;
        /* now have days since Jan 1, 1970; the rest is easy... */
        return days * SECS_PER_DAY + hour * SECS_PER_HOUR
            + min * SECS_PER_MINUTE + sec;
}

satime_t
getsecs(void)
{
        struct mvmeprom_time m;

        mvmeprom_rtc_rd(&m);
        return chiptotime(m.sec_BCD, m.min_BCD, m.hour_BCD, m.day_BCD,
            m.month_BCD, m.year_BCD);
}