199 lines
6.2 KiB
C
199 lines
6.2 KiB
C
/* $NetBSD: dpclock_hpc.c,v 1.2 2005/12/11 12:18:53 christos Exp $ */
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/*
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* Copyright (c) 2001 Erik Reid
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* Copyright (c) 2001 Rafal K. Boni
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* Copyright (c) 2001 Christopher Sekiya
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* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Portions of this code are derived from software contributed to The
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* NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace
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* Simulation Facility, NASA Ames Research Center.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <machine/sysconf.h>
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#include <machine/machtype.h>
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#include <dev/clock_subr.h>
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#include <sgimips/hpc/dp8573areg.h>
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#include <sgimips/hpc/hpcvar.h>
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#include <sgimips/sgimips/clockvar.h>
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struct dpclock_softc {
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struct device sc_dev;
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/* RTC registers */
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bus_space_tag_t sc_rtct;
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bus_space_handle_t sc_rtch;
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};
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static void dpclock_init(struct device *);
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static int dpclock_match(struct device *, struct cfdata *, void *);
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static void dpclock_attach(struct device *, struct device *, void *);
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static void dpclock_get(struct device *, struct clock_ymdhms *);
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static void dpclock_set(struct device *, struct clock_ymdhms *);
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const struct clockfns dpclock_clockfns = {
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dpclock_init, dpclock_get, dpclock_set,
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};
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CFATTACH_DECL(dpclock, sizeof(struct dpclock_softc),
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dpclock_match, dpclock_attach, NULL, NULL);
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static int
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dpclock_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct hpc_attach_args *ha = aux;
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if (strcmp(ha->ha_name, cf->cf_name) == 0)
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return (1);
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return (0);
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}
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static void
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dpclock_attach(struct device *parent, struct device *self, void *aux)
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{
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struct dpclock_softc *sc = (void *)self;
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struct hpc_attach_args *haa = aux;
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int err;
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printf("\n");
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sc->sc_rtct = haa->ha_st;
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if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh,
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haa->ha_devoff, 0x1ffff,
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&sc->sc_rtch)) != 0) {
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printf(": unable to map RTC registers, error = %d\n", err);
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return;
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}
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clockattach(&sc->sc_dev, &dpclock_clockfns);
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}
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static void
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dpclock_init(struct device *dev)
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{
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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 void
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dpclock_get(struct device *dev, struct clock_ymdhms * dt)
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{
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struct dpclock_softc *sc = (struct dpclock_softc *)dev;
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int s;
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u_int8_t i, j;
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u_int8_t regs[32];
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s = splhigh();
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i = bus_space_read_1(sc->sc_rtct, sc->sc_rtch, DP8573A_TIMESAVE_CTL);
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j = i | DP8573A_TIMESAVE_CTL_EN;
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_TIMESAVE_CTL, j);
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_TIMESAVE_CTL, i);
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splx(s);
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for (i = 0; i < 32; i++)
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regs[i] = bus_space_read_1(sc->sc_rtct, sc->sc_rtch, i);
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dt->dt_sec = FROMBCD(regs[DP8573A_SAVE_SEC]);
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dt->dt_min = FROMBCD(regs[DP8573A_SAVE_MIN]);
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if (regs[DP8573A_RT_MODE] & DP8573A_RT_MODE_1224) {
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dt->dt_hour = FROMBCD(regs[DP8573A_SAVE_HOUR] &
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DP8573A_HOUR_12HR_MASK) +
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((regs[DP8573A_SAVE_HOUR] & DP8573A_RT_MODE_1224) ? 0 : 12);
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/*
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* In AM/PM mode, hour range is 01-12, so adding in 12 hours
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* for PM gives us 01-24, whereas we want 00-23, so map hour
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* 24 to hour 0.
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*/
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if (dt->dt_hour == 24)
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dt->dt_hour = 0;
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} else {
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dt->dt_hour = FROMBCD(regs[DP8573A_SAVE_HOUR] &
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DP8573A_HOUR_24HR_MASK);
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}
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dt->dt_wday = FROMBCD(regs[DP8573A_DOW]); /* Not from time saved */
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dt->dt_day = FROMBCD(regs[DP8573A_SAVE_DOM]);
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dt->dt_mon = FROMBCD(regs[DP8573A_SAVE_MONTH]);
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dt->dt_year = FROM_IRIX_YEAR(FROMBCD(regs[DP8573A_YEAR]));
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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 void
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dpclock_set(struct device *dev, struct clock_ymdhms * dt)
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{
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struct dpclock_softc *sc = (struct dpclock_softc *)dev;
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int s;
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u_int8_t i, j;
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u_int8_t regs[32];
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s = splhigh();
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i = bus_space_read_1(sc->sc_rtct, sc->sc_rtch, DP8573A_TIMESAVE_CTL);
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j = i | DP8573A_TIMESAVE_CTL_EN;
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_TIMESAVE_CTL, j);
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_TIMESAVE_CTL, i);
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splx(s);
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for (i = 0; i < 32; i++)
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regs[i] = bus_space_read_1(sc->sc_rtct, sc->sc_rtch, i);
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regs[DP8573A_SUBSECOND] = 0;
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regs[DP8573A_SECOND] = TOBCD(dt->dt_sec);
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regs[DP8573A_MINUTE] = TOBCD(dt->dt_min);
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regs[DP8573A_HOUR] = TOBCD(dt->dt_hour) & DP8573A_HOUR_24HR_MASK;
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regs[DP8573A_DOW] = TOBCD(dt->dt_wday);
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regs[DP8573A_DOM] = TOBCD(dt->dt_day);
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regs[DP8573A_MONTH] = TOBCD(dt->dt_mon);
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regs[DP8573A_YEAR] = TOBCD(TO_IRIX_YEAR(dt->dt_year));
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s = splhigh();
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i = bus_space_read_1(sc->sc_rtct, sc->sc_rtch, DP8573A_RT_MODE);
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j = i & ~DP8573A_RT_MODE_CLKSS;
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_RT_MODE, j);
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for (i = 0; i < 10; i++)
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_COUNTERS +i,
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regs[DP8573A_COUNTERS + i]);
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bus_space_write_1(sc->sc_rtct, sc->sc_rtch, DP8573A_RT_MODE, i);
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splx(s);
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}
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