/*      $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);
}