NetBSD/sys/arch/mvme68k/dev/clock_pcctwo.c

/*	$NetBSD: clock_pcctwo.c,v 1.2 1999/02/14 17:54:28 scw Exp $ */

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Steve C. Woodford.
 *
 * 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 NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 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.
 */

/*
 * Glue for the Peripheral Channel Controller Two (PCCChip2) timers
 * and the Mostek clock chip found on the MVME-1[67]7 series of boards.
 */

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

#include <machine/psl.h>
#include <machine/cpu.h>

#include <mvme68k/mvme68k/clockreg.h>
#include <mvme68k/mvme68k/clockvar.h>

#include <mvme68k/dev/pccvar.h>
#include <mvme68k/dev/pcctworeg.h>


int 	clock_pcctwo_match __P((struct device *, struct cfdata  *, void *));
void	clock_pcctwo_attach __P((struct device *, struct device *, void *));
int 	clock_pcctwo_profintr __P((void *));
int 	clock_pcctwo_statintr __P((void *));
void	clock_pcctwo_initclocks __P((int, int));
void	clock_pcctwo_shutdown __P((void *));

u_char	clock_pcctwo_lvl;

struct cfattach clock_pcctwo_ca = {
	sizeof(struct device), clock_pcctwo_match, clock_pcctwo_attach
};

extern struct cfdriver clock_cd;

int
clock_pcctwo_match(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{
	struct pcc_attach_args *pa = aux;
	static int clock_pcctwo_matched;

	/* Only one clock, please. */
	if (clock_pcctwo_matched)
		return (0);

	if (strcmp(pa->pa_name, clock_cd.cd_name))
		return (0);

	clock_pcctwo_matched = 1;
	pa->pa_ipl = cf->pcccf_ipl;

	return (1);
}

void
clock_pcctwo_attach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct pcc_attach_args *pa = aux;
	caddr_t nvram, clockregs;

	if (pa->pa_ipl != CLOCK_LEVEL)
		panic("clock_pcctwo_attach: wrong interrupt level");

	/* As found on other mvme68k boards */
	nvram = PCCTWO_VADDR(pa->pa_offset);
	clockregs = PCCTWO_VADDR(pa->pa_offset + PCCTWO_RTC_OFF);

	/* Do common portions of clock config. */
	clock_config(self, clockregs, nvram, MK48T08_SIZE,
		     clock_pcctwo_initclocks);

	/* Ensure our interrupts get disabled at shutdown time. */
	(void)shutdownhook_establish(clock_pcctwo_shutdown, NULL);

	/* Attach the interrupt handlers. */
	pcctwointr_establish(PCCTWOV_TIMER1, clock_pcctwo_profintr,
			     pa->pa_ipl, NULL);
	pcctwointr_establish(PCCTWOV_TIMER2, clock_pcctwo_statintr,
			     pa->pa_ipl, NULL);
	clock_pcctwo_lvl = (pa->pa_ipl & PCCTWO_ICR_LEVEL_MASK) |
			   PCCTWO_ICR_ICLR | PCCTWO_ICR_IEN;
}

void
clock_pcctwo_initclocks(proftick, stattick)
	int proftick, stattick;
{
	sys_pcctwo->tt1_ctrl = PCCTWO_TT_CTRL_COVF;
	sys_pcctwo->tt1_counter = 0;
	sys_pcctwo->tt1_compare = PCCTWO_US2LIM(proftick);
	sys_pcctwo->tt1_ctrl = PCCTWO_TT_CTRL_CEN | PCCTWO_TT_CTRL_COC;
	sys_pcctwo->tt1_icr = clock_pcctwo_lvl;

	sys_pcctwo->tt2_ctrl = PCCTWO_TT_CTRL_COVF;
	sys_pcctwo->tt2_counter = 0;
	sys_pcctwo->tt2_compare = PCCTWO_US2LIM(stattick);
	sys_pcctwo->tt2_ctrl = PCCTWO_TT_CTRL_CEN | PCCTWO_TT_CTRL_COC;
	sys_pcctwo->tt2_icr = clock_pcctwo_lvl;
}

int
clock_pcctwo_profintr(frame)
	void *frame;
{
	sys_pcctwo->tt1_icr = clock_pcctwo_lvl;
	hardclock(frame);
	clock_profcnt.ev_count++;
	return (1);
}

int
clock_pcctwo_statintr(frame)
	void *frame;
{
	/* Disable the timer interrupt while we handle it. */
	sys_pcctwo->tt2_icr = 0;

	statclock((struct clockframe *)frame);

	sys_pcctwo->tt2_ctrl = PCCTWO_TT_CTRL_COVF;
	sys_pcctwo->tt2_counter = 0;
	sys_pcctwo->tt2_compare =
	    PCCTWO_US2LIM(CLOCK_NEWINT(clock_statvar, clock_statmin));
	sys_pcctwo->tt2_ctrl = PCCTWO_TT_CTRL_CEN | PCCTWO_TT_CTRL_COC;
	sys_pcctwo->tt2_icr = clock_pcctwo_lvl;

	clock_statcnt.ev_count++;
	return (1);
}

/* ARGSUSED */
void
clock_pcctwo_shutdown(arg)
	void *arg;
{
	/* Make sure the timer interrupts are turned off. */
	sys_pcctwo->tt1_ctrl = PCCTWO_TT_CTRL_COVF;
	sys_pcctwo->tt1_icr = 0;
	sys_pcctwo->tt2_ctrl = PCCTWO_TT_CTRL_COVF;
	sys_pcctwo->tt2_icr = 0;
}