NetBSD/sys/arch/luna68k/dev/timekeeper.c

248 lines
7.4 KiB
C

/* $NetBSD: timekeeper.c,v 1.2 2002/10/02 05:31:47 thorpej Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: timekeeper.c,v 1.2 2002/10/02 05:31:47 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <machine/cpu.h>
#include <dev/clock_subr.h>
#include <luna68k/luna68k/clockvar.h>
#include <luna68k/dev/timekeeper.h>
#include <machine/autoconf.h>
#define YEAR0 1970 /* year offset */
struct timekeeper_softc {
struct device sc_dev;
void *sc_clock, *sc_nvram;
int sc_nvramsize;
u_int8_t sc_image[2040];
};
/*
* BCD to decimal and decimal to BCD.
*/
#define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf))
#define TOBCD(x) (((x) / 10 * 16) + ((x) % 10))
static int clock_match __P((struct device *, struct cfdata *, void *));
static void clock_attach __P((struct device *, struct device *, void *));
CFATTACH_DECL(clock, sizeof (struct timekeeper_softc),
clock_match, clock_attach, NULL, NULL);
extern struct cfdriver clock_cd;
static void mkclock_get __P((struct device *, time_t, struct clock_ymdhms *));
static void mkclock_set __P((struct device *, struct clock_ymdhms *));
static void dsclock_get __P((struct device *, time_t, struct clock_ymdhms *));
static void dsclock_set __P((struct device *, struct clock_ymdhms *));
static struct clockfns mkclock_clockfns = {
NULL /* never used */, mkclock_get, mkclock_set,
};
static struct clockfns dsclock_clockfns = {
NULL /* never used */, dsclock_get, dsclock_set,
};
static int
clock_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct mainbus_attach_args *ma = aux;
if (strcmp(ma->ma_name, clock_cd.cd_name))
return 0;
return 1;
}
static void
clock_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct timekeeper_softc *sc = (void *)self;
struct mainbus_attach_args *ma = aux;
struct clockfns *clockwork;
switch (machtype) {
default:
case LUNA_I: /* Mostek MK48T02 */
sc->sc_clock = (void *)(ma->ma_addr + 2040);
sc->sc_nvram = (void *)ma->ma_addr;
sc->sc_nvramsize = 2040;
clockwork = &mkclock_clockfns;
printf(": mk48t02\n");
break;
case LUNA_II: /* Dallas DS1287A */
sc->sc_clock = (void *)ma->ma_addr;
sc->sc_nvram = (void *)(ma->ma_addr + 50);
sc->sc_nvramsize = 50;
clockwork = &dsclock_clockfns;
printf(": ds1287a\n");
break;
}
clockattach(&sc->sc_dev, clockwork);
memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize);
}
/*
* Get the time of day, based on the clock's value and/or the base value.
*/
static void
mkclock_get(dev, base, dt)
struct device *dev;
time_t base;
struct clock_ymdhms *dt;
{
struct timekeeper_softc *sc = (void *)dev;
volatile u_int8_t *chiptime = (void *)sc->sc_clock;
int s;
s = splclock();
chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */
dt->dt_sec = FROMBCD(chiptime[MK_SEC]);
dt->dt_min = FROMBCD(chiptime[MK_MIN]);
dt->dt_hour = FROMBCD(chiptime[MK_HOUR]);
dt->dt_wday = FROMBCD(chiptime[MK_DOW]);
dt->dt_day = FROMBCD(chiptime[MK_DOM]);
dt->dt_mon = FROMBCD(chiptime[MK_MONTH]);
dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0;
chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */
splx(s);
#ifdef TIMEKEEPER_DEBUG
printf("get %d/%d/%d %d:%d:%d\n",
dt->dt_year, dt->dt_mon, dt->dt_day,
dt->dt_hour, dt->dt_min, dt->dt_sec);
#endif
}
/*
* Reset the TODR based on the time value.
*/
static void
mkclock_set(dev, dt)
struct device *dev;
struct clock_ymdhms *dt;
{
struct timekeeper_softc *sc = (void *)dev;
volatile u_int8_t *chiptime = (void *)sc->sc_clock;
volatile u_int8_t *stamp = (u_int8_t *)sc->sc_nvram + 0x10;
int s;
s = splclock();
chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */
chiptime[MK_SEC] = TOBCD(dt->dt_sec);
chiptime[MK_MIN] = TOBCD(dt->dt_min);
chiptime[MK_HOUR] = TOBCD(dt->dt_hour);
chiptime[MK_DOW] = TOBCD(dt->dt_wday);
chiptime[MK_DOM] = TOBCD(dt->dt_day);
chiptime[MK_MONTH] = TOBCD(dt->dt_mon);
chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0);
chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */
splx(s);
#ifdef TIMEKEEPER_DEBUG
printf("set %d/%d/%d %d:%d:%d\n",
dt->dt_year, dt->dt_mon, dt->dt_day,
dt->dt_hour, dt->dt_min, dt->dt_sec);
#endif
stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0';
}
/*
* Get the time of day, based on the clock's value and/or the base value.
*/
static void
dsclock_get(dev, base, dt)
struct device *dev;
time_t base;
struct clock_ymdhms *dt;
{
struct timekeeper_softc *sc = (void *)dev;
volatile u_int8_t *chiptime = (void *)sc->sc_clock;
int s;
s = splclock();
/* update in progress; spin loop */
while (chiptime[MC_REGA] & MC_REGA_UIP)
;
dt->dt_sec = chiptime[MC_SEC];
dt->dt_min = chiptime[MC_MIN];
dt->dt_hour = chiptime[MC_HOUR];
dt->dt_wday = chiptime[MC_DOW];
dt->dt_day = chiptime[MC_DOM];
dt->dt_mon = chiptime[MC_MONTH];
dt->dt_year = chiptime[MC_YEAR] + YEAR0;
splx(s);
}
/*
* Reset the TODR based on the time value.
*/
static void
dsclock_set(dev, dt)
struct device *dev;
struct clock_ymdhms *dt;
{
struct timekeeper_softc *sc = (void *)dev;
volatile u_int8_t *chiptime = (void *)sc->sc_clock;
int s;
s = splclock();
chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */
chiptime[MC_SEC] = dt->dt_sec;
chiptime[MC_MIN] = dt->dt_min;
chiptime[MC_HOUR] = dt->dt_hour;
chiptime[MC_DOW] = dt->dt_wday;
chiptime[MC_DOM] = dt->dt_day;
chiptime[MC_MONTH] = dt->dt_mon;
chiptime[MC_YEAR] = dt->dt_year - YEAR0;
chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */
splx(s);
}