156 lines
4.5 KiB
C
156 lines
4.5 KiB
C
/* $NetBSD: mkclock.c,v 1.10 2009/03/14 21:04:12 dsl 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 Wayne Knowles
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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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*
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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>
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__KERNEL_RCSID(0, "$NetBSD: mkclock.c,v 1.10 2009/03/14 21:04:12 dsl Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <dev/clock_subr.h>
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#include <machine/cpu.h>
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#include <machine/mainboard.h>
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#include <machine/autoconf.h>
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#include <machine/sysconf.h>
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#include <machine/bus.h>
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#include <mipsco/obio/clockreg.h>
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struct mkclock_softc {
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struct device dev;
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bus_space_tag_t sc_bst;
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bus_space_handle_t sc_bsh;
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struct todr_chip_handle sc_todr;
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};
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static int mkclock_match (struct device *, struct cfdata *, void *);
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static void mkclock_attach (struct device *, struct device *, void *);
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CFATTACH_DECL(mkclock, sizeof(struct mkclock_softc),
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mkclock_match, mkclock_attach, NULL, NULL);
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int mkclock_read (todr_chip_handle_t, struct clock_ymdhms *);
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int mkclock_write (todr_chip_handle_t, struct clock_ymdhms *);
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static int mk_read (struct mkclock_softc *, int);
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static void mk_write (struct mkclock_softc *, int, int);
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int
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mkclock_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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return 1;
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}
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void
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mkclock_attach(struct device *parent, struct device *self, void *aux)
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{
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struct mkclock_softc *sc = (void *)self;
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struct confargs *ca = aux;
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sc->sc_bst = ca->ca_bustag;
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if (bus_space_map(ca->ca_bustag, ca->ca_addr,
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0x10000,
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BUS_SPACE_MAP_LINEAR,
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&sc->sc_bsh) != 0) {
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printf(": cannot map registers\n");
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return;
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}
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sc->sc_todr.todr_settime_ymdhms = mkclock_write;
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sc->sc_todr.todr_gettime_ymdhms = mkclock_read;
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sc->sc_todr.cookie = sc;
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todr_attach(&sc->sc_todr);
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printf("\n");
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}
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static int
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mk_read(struct mkclock_softc *sc, int reg)
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{
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u_int8_t val;
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val = bus_space_read_1(sc->sc_bst, sc->sc_bsh, DATA_PORT + reg*4);
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return FROMBCD(val);
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}
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static void
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mk_write(struct mkclock_softc *sc, int reg, int val)
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{
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bus_space_write_1(sc->sc_bst, sc->sc_bsh,
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DATA_PORT + reg*4, TOBCD(val));
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}
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int
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mkclock_read(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct mkclock_softc *sc = tch->cookie;
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int s = splclock();
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, READ_CLOCK);
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dt->dt_sec = mk_read(sc, 0);
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dt->dt_min = mk_read(sc, 1);
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dt->dt_hour = mk_read(sc, 2);
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dt->dt_wday = mk_read(sc, 3);
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dt->dt_day = mk_read(sc, 4);
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dt->dt_mon = mk_read(sc, 5);
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dt->dt_year = mk_read(sc, 6);
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, 0);
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splx(s);
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dt->dt_year = dt->dt_year + (dt->dt_year >= 70 ? 1900 : 2000);
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return 0;
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}
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int
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mkclock_write(todr_chip_handle_t tch, struct clock_ymdhms *dt)
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{
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struct mkclock_softc *sc = tch->cookie;
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int year, s;
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year = dt->dt_year % 100;
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s = splclock();
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, SET_CLOCK);
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mk_write(sc, 0, dt->dt_sec);
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mk_write(sc, 1, dt->dt_min);
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mk_write(sc, 2, dt->dt_hour);
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/* week day not set */
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mk_write(sc, 4, dt->dt_day);
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mk_write(sc, 5, dt->dt_mon);
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mk_write(sc, 6, year);
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, 0);
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splx(s);
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return 0;
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}
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