NetBSD-5.0.2/sys/arch/luna68k/dev/timekeeper.c
/* $NetBSD: timekeeper.c,v 1.5 2008/04/28 20:23:26 martin 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.
*
* 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 1.5 2008/04/28 20:23:26 martin 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/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];
struct todr_chip_handle sc_todr;
};
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 int mkclock_get __P((todr_chip_handle_t, struct clock_ymdhms *));
static int mkclock_set __P((todr_chip_handle_t, struct clock_ymdhms *));
static int dsclock_get __P((todr_chip_handle_t, struct clock_ymdhms *));
static int dsclock_set __P((todr_chip_handle_t, struct clock_ymdhms *));
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;
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;
sc->sc_todr.todr_gettime_ymdhms = mkclock_get;
sc->sc_todr.todr_settime_ymdhms = mkclock_set;
sc->sc_todr.cookie = sc;
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;
sc->sc_todr.todr_gettime_ymdhms = dsclock_get;
sc->sc_todr.todr_settime_ymdhms = dsclock_set;
sc->sc_todr.cookie = sc;
printf(": ds1287a\n");
break;
}
todr_attach(&sc->sc_todr);
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 int
mkclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt)
{
struct timekeeper_softc *sc = (void *)tch->cookie;
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);
return 0;
}
/*
* Reset the TODR based on the time value.
*/
static int
mkclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt)
{
struct timekeeper_softc *sc = (void *)tch->cookie;
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);
stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0';
return 0;
}
/*
* Get the time of day, based on the clock's value and/or the base value.
*/
static int
dsclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt)
{
struct timekeeper_softc *sc = (void *)tch->cookie;
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);
return 0;
}
/*
* Reset the TODR based on the time value.
*/
static int
dsclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt)
{
struct timekeeper_softc *sc = (void *)tch->cookie;
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);
return 0;
}