static int
rs5c313_todr_gettime_ymdhms(todr_chip_handle_t todr, struct clock_ymdhms *dt)
{
struct rs5c313_softc *sc = todr->cookie;
int retry;
int s;
/*
* If chip had invalid data on init, don't bother reading
* bogus values, let todr(9) cope.
*/
if (sc->sc_valid == 0)
return EIO;
s = splhigh();
rtc_begin(sc);
for (retry = 10; retry > 0; --retry) {
rtc_ce(sc, 1);
rs5c313_write_reg(sc, RS5C313_CTRL, sc->sc_ctrl[0]);
if ((rs5c313_read_reg(sc, RS5C313_CTRL) & CTRL_BSY) == 0)
break;
rtc_ce(sc, 0);
delay(1);
}
if (retry == 0) {
splx(s);
return EIO;
}
#define RTCGET(x, y) \
do { \
int ones = rs5c313_read_reg(sc, RS5C313_ ## y ## 1); \
int tens = rs5c313_read_reg(sc, RS5C313_ ## y ## 10); \
dt->dt_ ## x = tens * 10 + ones; \
} while (/* CONSTCOND */0)
RTCGET(sec, SEC);
RTCGET(min, MIN);
RTCGET(hour, HOUR);
RTCGET(day, DAY);
RTCGET(mon, MON);
RTCGET(year, YEAR);
#undef RTCGET
dt->dt_wday = rs5c313_read_reg(sc, RS5C313_WDAY);
rtc_ce(sc, 0);
splx(s);
dt->dt_year = (dt->dt_year % 100) + 1900;
if (dt->dt_year < POSIX_BASE_YEAR) {
dt->dt_year += 100;
}
return 0;
}
void
sh_rtc_get(void *cookie, time_t base, struct clock_ymdhms *dt)
{
int retry = 8;
/* disable carry interrupt */
_reg_bclr_1(SH_(RCR1), SH_RCR1_CIE);
do {
uint8_t r = _reg_read_1(SH_(RCR1));
r &= ~SH_RCR1_CF;
r |= SH_RCR1_AF; /* don't clear alarm flag */
_reg_write_1(SH_(RCR1), r);
if (CPU_IS_SH3)
dt->dt_year = FROMBCD(_reg_read_1(SH3_RYRCNT));
else
dt->dt_year = FROMBCD(_reg_read_2(SH4_RYRCNT) & 0x00ff);
/* read counter */
#define RTCGET(x, y) dt->dt_ ## x = FROMBCD(_reg_read_1(SH_(R ## y ## CNT)))
RTCGET(mon, MON);
RTCGET(wday, WK);
RTCGET(day, DAY);
RTCGET(hour, HR);
RTCGET(min, MIN);
RTCGET(sec, SEC);
#undef RTCGET
} while ((_reg_read_1(SH_(RCR1)) & SH_RCR1_CF) && --retry > 0);
if (retry == 0) {
printf("rtc_gettime: couldn't read RTC register.\n");
memset(dt, 0, sizeof(*dt));
return;
}
dt->dt_year = (dt->dt_year % 100) + 1900;
if (dt->dt_year < 1970)
dt->dt_year += 100;
}
