221 lines
6.9 KiB
C
221 lines
6.9 KiB
C
/* $NetBSD: timekeeper.c,v 1.4 2006/09/14 15:04:07 gdamore Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tohru Nishimura.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: timekeeper.c,v 1.4 2006/09/14 15:04:07 gdamore Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <machine/cpu.h>
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#include <dev/clock_subr.h>
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#include <luna68k/dev/timekeeper.h>
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#include <machine/autoconf.h>
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#define YEAR0 1970 /* year offset */
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struct timekeeper_softc {
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struct device sc_dev;
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void *sc_clock, *sc_nvram;
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int sc_nvramsize;
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u_int8_t sc_image[2040];
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struct todr_chip_handle sc_todr;
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};
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static int clock_match __P((struct device *, struct cfdata *, void *));
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static void clock_attach __P((struct device *, struct device *, void *));
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CFATTACH_DECL(clock, sizeof (struct timekeeper_softc),
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clock_match, clock_attach, NULL, NULL);
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extern struct cfdriver clock_cd;
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static int mkclock_get __P((todr_chip_handle_t, struct clock_ymdhms *));
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static int mkclock_set __P((todr_chip_handle_t, struct clock_ymdhms *));
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static int dsclock_get __P((todr_chip_handle_t, struct clock_ymdhms *));
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static int dsclock_set __P((todr_chip_handle_t, struct clock_ymdhms *));
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static int
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clock_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct mainbus_attach_args *ma = aux;
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if (strcmp(ma->ma_name, clock_cd.cd_name))
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return 0;
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return 1;
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}
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static void
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clock_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct timekeeper_softc *sc = (void *)self;
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struct mainbus_attach_args *ma = aux;
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switch (machtype) {
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default:
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case LUNA_I: /* Mostek MK48T02 */
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sc->sc_clock = (void *)(ma->ma_addr + 2040);
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sc->sc_nvram = (void *)ma->ma_addr;
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sc->sc_nvramsize = 2040;
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sc->sc_todr.todr_gettime_ymdhms = mkclock_get;
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sc->sc_todr.todr_settime_ymdhms = mkclock_set;
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sc->sc_todr.cookie = sc;
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printf(": mk48t02\n");
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break;
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case LUNA_II: /* Dallas DS1287A */
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sc->sc_clock = (void *)ma->ma_addr;
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sc->sc_nvram = (void *)(ma->ma_addr + 50);
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sc->sc_nvramsize = 50;
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sc->sc_todr.todr_gettime_ymdhms = dsclock_get;
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sc->sc_todr.todr_settime_ymdhms = dsclock_set;
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sc->sc_todr.cookie = sc;
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printf(": ds1287a\n");
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break;
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}
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todr_attach(&sc->sc_todr);
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memcpy(sc->sc_image, sc->sc_nvram, sc->sc_nvramsize);
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}
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/*
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* Get the time of day, based on the clock's value and/or the base value.
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*/
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static int
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mkclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct timekeeper_softc *sc = (void *)tch->cookie;
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volatile u_int8_t *chiptime = (void *)sc->sc_clock;
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int s;
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s = splclock();
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chiptime[MK_CSR] |= MK_CSR_READ; /* enable read (stop time) */
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dt->dt_sec = FROMBCD(chiptime[MK_SEC]);
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dt->dt_min = FROMBCD(chiptime[MK_MIN]);
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dt->dt_hour = FROMBCD(chiptime[MK_HOUR]);
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dt->dt_wday = FROMBCD(chiptime[MK_DOW]);
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dt->dt_day = FROMBCD(chiptime[MK_DOM]);
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dt->dt_mon = FROMBCD(chiptime[MK_MONTH]);
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dt->dt_year = FROMBCD(chiptime[MK_YEAR]) + YEAR0;
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chiptime[MK_CSR] &= ~MK_CSR_READ; /* time wears on */
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splx(s);
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return 0;
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}
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/*
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* Reset the TODR based on the time value.
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*/
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static int
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mkclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct timekeeper_softc *sc = (void *)tch->cookie;
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volatile u_int8_t *chiptime = (void *)sc->sc_clock;
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volatile u_int8_t *stamp = (u_int8_t *)sc->sc_nvram + 0x10;
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int s;
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s = splclock();
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chiptime[MK_CSR] |= MK_CSR_WRITE; /* enable write */
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chiptime[MK_SEC] = TOBCD(dt->dt_sec);
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chiptime[MK_MIN] = TOBCD(dt->dt_min);
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chiptime[MK_HOUR] = TOBCD(dt->dt_hour);
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chiptime[MK_DOW] = TOBCD(dt->dt_wday);
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chiptime[MK_DOM] = TOBCD(dt->dt_day);
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chiptime[MK_MONTH] = TOBCD(dt->dt_mon);
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chiptime[MK_YEAR] = TOBCD(dt->dt_year - YEAR0);
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chiptime[MK_CSR] &= ~MK_CSR_WRITE; /* load them up */
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splx(s);
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stamp[0] = 'R'; stamp[1] = 'T'; stamp[2] = 'C'; stamp[3] = '\0';
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return 0;
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}
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/*
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* Get the time of day, based on the clock's value and/or the base value.
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*/
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static int
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dsclock_get(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct timekeeper_softc *sc = (void *)tch->cookie;
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volatile u_int8_t *chiptime = (void *)sc->sc_clock;
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int s;
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s = splclock();
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/* update in progress; spin loop */
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while (chiptime[MC_REGA] & MC_REGA_UIP)
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;
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dt->dt_sec = chiptime[MC_SEC];
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dt->dt_min = chiptime[MC_MIN];
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dt->dt_hour = chiptime[MC_HOUR];
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dt->dt_wday = chiptime[MC_DOW];
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dt->dt_day = chiptime[MC_DOM];
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dt->dt_mon = chiptime[MC_MONTH];
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dt->dt_year = chiptime[MC_YEAR] + YEAR0;
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splx(s);
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return 0;
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}
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/*
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* Reset the TODR based on the time value.
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*/
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static int
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dsclock_set(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct timekeeper_softc *sc = (void *)tch->cookie;
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volatile u_int8_t *chiptime = (void *)sc->sc_clock;
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int s;
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s = splclock();
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chiptime[MC_REGB] |= MC_REGB_SET; /* enable write */
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chiptime[MC_SEC] = dt->dt_sec;
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chiptime[MC_MIN] = dt->dt_min;
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chiptime[MC_HOUR] = dt->dt_hour;
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chiptime[MC_DOW] = dt->dt_wday;
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chiptime[MC_DOM] = dt->dt_day;
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chiptime[MC_MONTH] = dt->dt_mon;
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chiptime[MC_YEAR] = dt->dt_year - YEAR0;
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chiptime[MC_REGB] &= ~MC_REGB_SET; /* load them up */
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splx(s);
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return 0;
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}
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