NetBSD/sys/arch/x68k/dev/rtclock.c

214 lines
5.4 KiB
C

/* $NetBSD: rtclock.c,v 1.10 2001/05/26 21:32:30 minoura Exp $ */
/*
* Copyright 1993, 1994 Masaru Oki
* 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 Masaru Oki.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* X680x0 internal real time clock interface
* alarm is not supported.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/file.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <dev/clock_subr.h>
#include <arch/x68k/dev/rtclock_var.h>
#include <arch/x68k/dev/intiovar.h>
static time_t rtgettod __P((void));
static int rtsettod __P((long));
static int rtc_match __P((struct device *, struct cfdata *, void *));
static void rtc_attach __P((struct device *, struct device *, void *));
int rtclockinit __P((void));
struct cfattach rtc_ca = {
sizeof(struct rtc_softc), rtc_match, rtc_attach
};
static int
rtc_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct intio_attach_args *ia = aux;
if (strcmp (ia->ia_name, "rtc") != 0)
return (0);
if (cf->cf_unit != 0)
return (0);
/* fixed address */
if (ia->ia_addr != RTC_ADDR)
return (0);
if (ia->ia_intr != -1)
return (0);
return (1);
}
static struct rtc_softc *rtc; /* XXX: softc cache */
static void
rtc_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct rtc_softc *sc = (struct rtc_softc *)self;
struct intio_attach_args *ia = aux;
int r;
ia->ia_size = 0x20;
r = intio_map_allocate_region (parent, ia, INTIO_MAP_ALLOCATE);
#ifdef DIAGNOSTIC
if (r)
panic ("IO map for RTC corruption??");
#endif
sc->sc_bst = ia->ia_bst;
bus_space_map(sc->sc_bst, ia->ia_addr, 0x2000, 0, &sc->sc_bht);
rtc = sc;
rtclockinit();
printf (": RP5C15\n");
}
/*
* x68k/clock.c calls thru this vector, if it is set, to read
* the realtime clock.
*/
time_t (*gettod) __P((void));
int (*settod) __P((long));
int
rtclockinit()
{
if (rtgettod()) {
gettod = rtgettod;
settod = rtsettod;
} else {
return 0;
}
return 1;
}
static time_t
rtgettod()
{
struct clock_ymdhms dt;
/* hold clock */
RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK);
/* read it */
dt.dt_sec = RTC_REG(RTC_SEC10) * 10 + RTC_REG(RTC_SEC);
dt.dt_min = RTC_REG(RTC_MIN10) * 10 + RTC_REG(RTC_MIN);
dt.dt_hour = RTC_REG(RTC_HOUR10) * 10 + RTC_REG(RTC_HOUR);
dt.dt_day = RTC_REG(RTC_DAY10) * 10 + RTC_REG(RTC_DAY);
dt.dt_mon = RTC_REG(RTC_MON10) * 10 + RTC_REG(RTC_MON);
dt.dt_year = RTC_REG(RTC_YEAR10) * 10 + RTC_REG(RTC_YEAR)
+RTC_BASE_YEAR;
/* let it run again.. */
RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK);
#ifdef DIAGNOSTIC
range_test0(dt.dt_hour, 23);
range_test(dt.dt_day, 1, 31);
range_test(dt.dt_mon, 1, 12);
range_test(dt.dt_year, RTC_BASE_YEAR, RTC_BASE_YEAR+100-1);
#endif
return clock_ymdhms_to_secs (&dt) + rtc_offset * 60;
}
static int
rtsettod (tim)
time_t tim;
{
struct clock_ymdhms dt;
u_char sec1, sec2;
u_char min1, min2;
u_char hour1, hour2;
u_char day1, day2;
u_char mon1, mon2;
u_char year1, year2;
clock_secs_to_ymdhms (tim - rtc_offset * 60, &dt);
/* prepare values to be written to clock */
sec1 = dt.dt_sec / 10;
sec2 = dt.dt_sec % 10;
min1 = dt.dt_min / 10;
min2 = dt.dt_min % 10;
hour1 = dt.dt_hour / 10;
hour2 = dt.dt_hour % 10;
day1 = dt.dt_day / 10;
day2 = dt.dt_day % 10;
mon1 = dt.dt_mon / 10;
mon2 = dt.dt_mon % 10;
year1 = (dt.dt_year - RTC_BASE_YEAR) / 10;
year2 = dt.dt_year % 10;
RTC_WRITE(RTC_MODE, RTC_HOLD_CLOCK);
RTC_WRITE(RTC_SEC10, sec1);
RTC_WRITE(RTC_SEC, sec2);
RTC_WRITE(RTC_MIN10, min1);
RTC_WRITE(RTC_MIN, min2);
RTC_WRITE(RTC_HOUR10, hour1);
RTC_WRITE(RTC_HOUR, hour2);
RTC_WRITE(RTC_DAY10, day1);
RTC_WRITE(RTC_DAY, day2);
RTC_WRITE(RTC_MON10, mon1);
RTC_WRITE(RTC_MON, mon2);
RTC_WRITE(RTC_YEAR10, year1);
RTC_WRITE(RTC_YEAR, year2);
RTC_WRITE(RTC_MODE, RTC_FREE_CLOCK);
return 1;
}