xref: /src/sys/arch/hpcmips/vr/rtc.c

/*	$NetBSD: rtc.c,v 1.7 2001/09/16 05:32:21 uch Exp $	*/

/*-
 * Copyright (c) 1999 Shin Takemura. All rights reserved.
 * Copyright (c) 1999 SATO Kazumi. All rights reserved.
 * Copyright (c) 1999 PocketBSD Project. All rights reserved.
 *
 * 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 PocketBSD project
 *	and its contributors.
 * 4. Neither the name of the project 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 REGENTS 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 REGENTS 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 "opt_vr41xx.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/reboot.h>

#include <machine/bus.h>
#include <machine/clock_machdep.h>
#include <machine/cpu.h>

#include <hpcmips/vr/vr.h>
#include <hpcmips/vr/vrcpudef.h>
#include <hpcmips/vr/vripvar.h>
#include <hpcmips/vr/rtcreg.h>
#include <dev/dec/clockvar.h>

/*
 * for debugging definitions
 * 	VRRTCDEBUG	print rtc debugging information
 *	VRRTC_HEARTBEAT	print HEARTBEAT (too many print...)
 */
#ifdef VRRTCDEBUG
#ifndef VRRTCDEBUG_CONF
#define VRRTCDEBUG_CONF 0
#endif
int vrrtc_debug = VRRTCDEBUG_CONF;
#define DPRINTF(arg) if (vrrtc_debug) printf arg;
#define DDUMP_REGS(arg) if (vrrtc_debug) vrrtc_dump_regs(arg);
#else /* VRRTCDEBUG */
#define DPRINTF(arg)
#define DDUMP_REGS(arg)
#endif /* VRRTCDEBUG */

struct vrrtc_softc {
	struct device sc_dev;
	bus_space_tag_t sc_iot;
	bus_space_handle_t sc_ioh;
	void *sc_ih;
};

void	clock_init(struct device *);
void	clock_get(struct device *, time_t, struct clocktime *);
void	clock_set(struct device *, struct clocktime *);

static const struct clockfns clockfns = {
	clock_init, clock_get, clock_set,
};

int	vrrtc_match(struct device *, struct cfdata *, void *);
void	vrrtc_attach(struct device *, struct device *, void *);
int	vrrtc_intr(void*, u_int32_t, u_int32_t);
void	vrrtc_dump_regs(struct vrrtc_softc *);

struct cfattach vrrtc_ca = {
	sizeof(struct vrrtc_softc), vrrtc_match, vrrtc_attach
};

void	vrrtc_write(struct vrrtc_softc *, int, unsigned short);
unsigned short	vrrtc_read(struct vrrtc_softc *, int);
void	cvt_timehl_ct(u_long, u_long, struct clocktime *);

extern int rtc_offset;

int
vrrtc_match(struct device *parent, struct cfdata *cf, void *aux)
{

	return(1);
}

inline void
vrrtc_write(struct vrrtc_softc *sc, int port, unsigned short val)
{

	bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
}

inline unsigned short
vrrtc_read(struct vrrtc_softc *sc, int port)
{

	return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
}

void
vrrtc_attach(struct device *parent, struct device *self, void *aux)
{
	struct vrip_attach_args *va = aux;
	struct vrrtc_softc *sc = (void*)self;

	sc->sc_iot = va->va_iot;
	if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size,
	    0 /* no flags */, &sc->sc_ioh)) {
		printf("vrrtc_attach: can't map i/o space\n");
		return;
	}
	/* RTC interrupt handler is directly dispatched from CPU intr */
	vr_intr_establish(VR_INTR1, vrrtc_intr, sc);
	/* But need to set level 1 interupt mask register,
	 * so regsiter fake interrurpt handler
	 */
	if (!(sc->sc_ih = vrip_intr_establish(va->va_vc, va->va_intr,
	    IPL_CLOCK, 0, 0))) {
		printf (":can't map interrupt.\n");
		return;
	}
	/*
	 *  Rtc is attached to call this routine
	 *  before cpu_initclock() calls clock_init().
	 *  So we must disable all interrupt for now.
	 */
	/*
	 * Disable all rtc interrupts
	 */
	/* Disable Elapse compare intr */
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECMP_H_REG_W, 0);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECMP_M_REG_W, 0);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, ECMP_L_REG_W, 0);
	/* Disable RTC Long1 intr */
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCL1_H_REG_W, 0);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCL1_L_REG_W, 0);
	/* Disable RTC Long2 intr */
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCL2_H_REG_W, 0);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCL2_L_REG_W, 0);
	/* Disable RTC TCLK intr */
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, TCLK_H_REG_W, 0);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, TCLK_L_REG_W, 0);
	/*
	 * Clear all rtc intrrupts.
	 */
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCINT_REG_W, RTCINT_ALL);

	clockattach(&sc->sc_dev, &clockfns);
}

int
vrrtc_intr(void *arg, u_int32_t pc, u_int32_t statusReg)
{
	struct vrrtc_softc *sc = arg;
	struct clockframe cf;

	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCINT_REG_W, RTCINT_ALL);
	cf.pc = pc;
	cf.sr = statusReg;
	hardclock(&cf);
	intrcnt[HARDCLOCK]++;

#ifdef VRRTC_HEARTBEAT
	if ((intrcnt[HARDCLOCK] % (CLOCK_RATE * 5)) == 0) {
		struct clocktime ct;
		clock_get((struct device *)sc, NULL, &ct);
		printf("%s(%d): rtc_intr: %2d.%2d.%2d %02d:%02d:%02d\n",
		    __FILE__, __LINE__,
		    ct.year, ct.mon, ct.day,
		    ct.hour, ct.min, ct.sec);
	}
#endif
	return 0;
}

void
vrrtc_dump_regs(struct vrrtc_softc *sc)
{
	int timeh;
	int timel;

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ETIME_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ETIME_M_REG_W);
	timel = (timel << 16)
	    | bus_space_read_2(sc->sc_iot, sc->sc_ioh, ETIME_L_REG_W);
	printf("clock_init()  Elapse Time %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ECMP_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ECMP_M_REG_W);
	timel = (timel << 16)
	    | bus_space_read_2(sc->sc_iot, sc->sc_ioh, ECMP_L_REG_W);
	printf("clock_init()  Elapse Compare %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL1_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL1_L_REG_W);
	printf("clock_init()  LONG1 %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL1_CNT_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL1_CNT_L_REG_W);
	printf("clock_init()  LONG1 CNTL %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL2_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL2_L_REG_W);
	printf("clock_init()  LONG2 %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL2_CNT_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, RTCL2_CNT_L_REG_W);
	printf("clock_init()  LONG2 CNTL %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, TCLK_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, TCLK_L_REG_W);
	printf("clock_init()  TCLK %04x%04x\n", timeh, timel);

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, TCLK_CNT_H_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, TCLK_CNT_L_REG_W);
	printf("clock_init()  TCLK CNTL %04x%04x\n", timeh, timel);
}

void
clock_init(struct device *dev)
{
	struct vrrtc_softc *sc = (struct vrrtc_softc *)dev;

	DDUMP_REGS(sc);
	/*
	 * Set tick (CLOCK_RATE)
	 */
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, RTCL1_H_REG_W, 0);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh,
	    RTCL1_L_REG_W, RTCL1_L_HZ/CLOCK_RATE);
}

static int m2d[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

void
cvt_timehl_ct(
	u_long timeh, /* 2 sec */
	u_long timel, /* 1/32768 sec */
	struct clocktime *ct)
{
	u_long year, month, date, hour, min, sec, sec2;

	timeh -= EPOCHOFF;

	timeh += (rtc_offset*SEC2MIN);

	year = EPOCHYEAR;
	sec2 = LEAPYEAR4(year)?SEC2YR+SEC2DAY:SEC2YR;
	while (timeh > sec2) {
		year++;
		timeh -= sec2;
		sec2 = LEAPYEAR4(year)?SEC2YR+SEC2DAY:SEC2YR;
	}

	DPRINTF(("cvt_timehl_ct: timeh %08lx year %ld yrref %ld\n",
	    timeh, year, sec2));

	month = 0; /* now month is 0..11 */
	sec2 = SEC2DAY * m2d[month];
	while (timeh > sec2) {
		timeh -= sec2;
		month++;
		sec2 = SEC2DAY * m2d[month];
		if (month == 1 && LEAPYEAR4(year)) /* feb. and leapyear */
			sec2 += SEC2DAY;
	}
	month +=1; /* now month is 1..12 */

	DPRINTF(("cvt_timehl_ct: timeh %08lx month %ld mref %ld\n",
	    timeh, month, sec2));

	sec2 = SEC2DAY;
	date = timeh/sec2+1; /* date is 1..31 */
	timeh -= (date-1)*sec2;

	DPRINTF(("cvt_timehl_ct: timeh %08lx date %ld dref %ld\n",
	    timeh, date, sec2));

	sec2 = SEC2HOUR;
	hour = timeh/sec2;
	timeh -= hour*sec2;

	sec2 = SEC2MIN;
	min = timeh/sec2;
	timeh -= min*sec2;

	sec = timeh*2 + timel/ETIME_L_HZ;

	DPRINTF(("cvt_timehl_ct: hour %ld min %ld sec %ld\n", hour, min, sec));

	if (ct) {
		ct->year = year - YBASE; /* base 1900 */
		ct->mon = month;
		ct->day = date;
		ct->hour = hour;
		ct->min = min;
		ct->sec = sec;
	}
}

void
clock_get(struct device *dev, time_t base, struct clocktime *ct)
{

	struct vrrtc_softc *sc = (struct vrrtc_softc *)dev;
	u_long timeh;	/* elapse time (2*timeh sec) */
	u_long timel;	/* timel/32768 sec */

	timeh = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ETIME_H_REG_W);
	timeh = (timeh << 16)
	    | bus_space_read_2(sc->sc_iot, sc->sc_ioh, ETIME_M_REG_W);
	timel = bus_space_read_2(sc->sc_iot, sc->sc_ioh, ETIME_L_REG_W);

	DPRINTF(("clock_get: timeh %08lx timel %08lx\n", timeh, timel));

	cvt_timehl_ct(timeh, timel, ct);

	DPRINTF(("clock_get: %d/%d/%d/%d/%d/%d\n",
	    ct->year, ct->mon, ct->day, ct->hour, ct->min, ct->sec));
}


void
clock_set(struct device *dev, struct clocktime *ct)
{
	struct vrrtc_softc *sc = (struct vrrtc_softc *)dev;
	u_long timeh;	/* elapse time (2*timeh sec) */
	u_long timel;	/* timel/32768 sec */
	int year, month, sec2;

	timeh = 0;
	timel = 0;

	DPRINTF(("clock_set: %d/%d/%d/%d/%d/%d\n",
	    ct->year, ct->mon, ct->day, ct->hour, ct->min, ct->sec));

	ct->year += YBASE;

	DPRINTF(("clock_set: %d/%d/%d/%d/%d/%d\n",
	    ct->year, ct->mon, ct->day, ct->hour, ct->min, ct->sec));

	year = EPOCHYEAR;
	sec2 = LEAPYEAR4(year)?SEC2YR+SEC2DAY:SEC2YR;
	while (year < ct->year) {
		year++;
		timeh += sec2;
		sec2 = LEAPYEAR4(year)?SEC2YR+SEC2DAY:SEC2YR;
	}
	month = 1; /* now month is 1..12 */
	sec2 = SEC2DAY * m2d[month-1];
	while (month < ct->mon) {
		month++;
		timeh += sec2;
		sec2 = SEC2DAY * m2d[month-1];
		if (month == 2 && LEAPYEAR4(year)) /* feb. and leapyear */
			sec2 += SEC2DAY;
	}

	timeh += (ct->day - 1)*SEC2DAY;

	timeh += ct->hour*SEC2HOUR;

	timeh += ct->min*SEC2MIN;

	timeh += ct->sec/2;
	timel += (ct->sec%2)*ETIME_L_HZ;

	timeh += EPOCHOFF;
	timeh -= (rtc_offset*SEC2MIN);

#ifdef VRRTCDEBUG
	cvt_timehl_ct(timeh, timel, NULL);
#endif /* RTCDEBUG */

	bus_space_write_2(sc->sc_iot, sc->sc_ioh,
	    ETIME_H_REG_W, (timeh>>16)&0xffff);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, ETIME_M_REG_W, timeh&0xffff);
	bus_space_write_2(sc->sc_iot, sc->sc_ioh, ETIME_L_REG_W, timel);

}