bigtime_t arch_get_rtc_delta(void)
{
//int oldsec
int sec, min, hour;
int day, month, year, century;
bigtime_t val;
isa_rtc_nmi_off();
check_update_in_progress();
//retry:
min = readrtc(RTC_MIN);
if(min < 0 || min > 59) min = 0;
hour = readrtc(RTC_HOUR);
if(hour < 0 || hour > 23) hour = 0;
month = readrtc(RTC_MONTH);
if(month < 1 || month > 12) month = 1;
day = readrtc(RTC_DAY);
if(day < 1 || day > month_days[month-1])
day = 1;
year = readrtc(RTC_YEAR);
century = readrtc(RTC_CENTURY);
if(century > 0) {
year += century * 100;
} else {
if(year < 80)
year += 2000;
else
year += 1900;
}
/*
// keep reading the second counter until it changes
oldsec = readrtc(RTC_SEC);
while((sec = readrtc(RTC_SEC)) == oldsec)
;
if(sec == 0) {
// we just wrapped around, and potentially changed
// all of the other counters, retry everything
goto retry;
}*/
sec = readrtc(RTC_SEC);
isa_rtc_nmi_on();
// convert these values into usecs since Jan 1, 1 AD
val = (365 * (year - 1) - (year / 4) + (year / 400)) * usecs_per_day;
val += ((day - 1) + months[month - 1] + ((month > 2) ? is_leap_year(year) : 0)) * usecs_per_day;
val += (((hour * 60) + min) * 60 + sec) * 1000000;
printf("arch_get_rtc_delta: GMT %d:%d:%d %d.%d.%d\n",
hour, min, sec, day, month, year );
return val;
}
void rtc_read_tm( struct tm *out )
{
isa_rtc_nmi_off();
check_update_in_progress();
//retry:
out->tm_min = readrtc(RTC_MIN);
out->tm_hour = readrtc(RTC_HOUR);
out->tm_mon = readrtc(RTC_MONTH);
out->tm_mday = readrtc(RTC_DAY);
int year = readrtc(RTC_YEAR);
int century = readrtc(RTC_CENTURY);
if(century > 0) {
year += century * 100;
} else {
if(year < 80)
year += 2000;
else
year += 1900;
}
out->tm_year = year - 1900;
out->tm_yday = 0; // TODO calc me
out->tm_wday = readrtc(RTC_WDAY);
/*
// keep reading the second counter until it changes
int sec;
int oldsec = readrtc(RTC_SEC);
while((sec = readrtc(RTC_SEC)) == oldsec)
;
if(sec == 0) {
// we just wrapped around, and potentially changed
// all of the other counters, retry everything
goto retry;
}
out->tm_sec=sec;
*/
out->tm_sec = readrtc(RTC_SEC);
isa_rtc_nmi_on();
}
static int
atrtc_gettime(device_t dev, struct timespec *ts)
{
struct clocktime ct;
int s;
/* Look if we have a RTC present and the time is valid */
if (!(rtcin(RTC_STATUSD) & RTCSD_PWR)) {
device_printf(dev, "WARNING: Battery failure indication\n");
return (EINVAL);
}
/* wait for time update to complete */
/* If RTCSA_TUP is zero, we have at least 244us before next update */
s = splhigh();
while (rtcin(RTC_STATUSA) & RTCSA_TUP) {
splx(s);
s = splhigh();
}
ct.nsec = 0;
ct.sec = readrtc(RTC_SEC);
ct.min = readrtc(RTC_MIN);
ct.hour = readrtc(RTC_HRS);
ct.day = readrtc(RTC_DAY);
ct.dow = readrtc(RTC_WDAY) - 1;
ct.mon = readrtc(RTC_MONTH);
ct.year = readrtc(RTC_YEAR);
#ifdef USE_RTC_CENTURY
ct.year += readrtc(RTC_CENTURY) * 100;
#else
ct.year += 2000;
#endif
/* Set dow = -1 because some clocks don't set it correctly. */
ct.dow = -1;
return (clock_ct_to_ts(&ct, ts));
}
