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

215 lines
6.6 KiB
C

/* $NetBSD: clock_pcctwo.c,v 1.3 2000/03/18 22:33:02 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/bus.h>
#include <mvme68k/mvme68k/clockreg.h>
#include <mvme68k/mvme68k/clockvar.h>
#include <mvme68k/dev/pcctwovar.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 *));
struct clock_pcctwo_softc {
struct device sc_dev;
struct clock_attach_args sc_clock_args;
u_char sc_clock_lvl;
};
struct cfattach clock_pcctwo_ca = {
sizeof(struct device), clock_pcctwo_match, clock_pcctwo_attach
};
extern struct cfdriver clock_cd;
static int clock_pcctwo_profintr __P((void *));
static int clock_pcctwo_statintr __P((void *));
static void clock_pcctwo_initclocks __P((void *, int, int));
static void clock_pcctwo_shutdown __P((void *));
static struct clock_pcctwo_softc *clock_pcctwo_sc;
/* ARGSUSED */
int
clock_pcctwo_match(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct pcctwo_attach_args *pa = aux;
/* Only one clock, please. */
if (clock_pcctwo_sc)
return (0);
if (strcmp(pa->pa_name, clock_cd.cd_name))
return (0);
pa->pa_ipl = cf->pcctwocf_ipl;
return (1);
}
/* ARGSUSED */
void
clock_pcctwo_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct clock_pcctwo_softc *sc;
struct pcctwo_attach_args *pa;
sc = clock_pcctwo_sc = (struct clock_pcctwo_softc *) self;
pa = aux;
if (pa->pa_ipl != CLOCK_LEVEL)
panic("clock_pcctwo_attach: wrong interrupt level");
/* Map the RTC's registers */
sc->sc_clock_args.ca_bust = pa->pa_bust;
bus_space_map(pa->pa_bust, pa->pa_offset,
MK48T_REGSIZE, 0, &sc->sc_clock_args.ca_bush);
sc->sc_clock_args.ca_arg = sc;
sc->sc_clock_args.ca_initfunc = clock_pcctwo_initclocks;
/* Do common portions of clock config. */
clock_config(self, &sc->sc_clock_args);
/* 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);
sc->sc_clock_lvl = (pa->pa_ipl & PCCTWO_ICR_LEVEL_MASK) |
PCCTWO_ICR_ICLR | PCCTWO_ICR_IEN;
}
void
clock_pcctwo_initclocks(arg, proftick, stattick)
void *arg;
int proftick;
int stattick;
{
struct clock_pcctwo_softc *sc;
sc = arg;
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER1_CONTROL, PCCTWO_TT_CTRL_COVF);
pcc2_reg_write32(sys_pcctwo, PCC2REG_TIMER1_COUNTER, 0);
pcc2_reg_write32(sys_pcctwo, PCC2REG_TIMER1_COMPARE,
PCCTWO_US2LIM(proftick));
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER1_CONTROL,
PCCTWO_TT_CTRL_CEN | PCCTWO_TT_CTRL_COC);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER1_ICSR, sc->sc_clock_lvl);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_CONTROL, PCCTWO_TT_CTRL_COVF);
pcc2_reg_write32(sys_pcctwo, PCC2REG_TIMER2_COUNTER, 0);
pcc2_reg_write32(sys_pcctwo, PCC2REG_TIMER2_COMPARE,
PCCTWO_US2LIM(stattick));
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_CONTROL,
PCCTWO_TT_CTRL_CEN | PCCTWO_TT_CTRL_COC);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_ICSR, sc->sc_clock_lvl);
}
int
clock_pcctwo_profintr(frame)
void *frame;
{
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER1_ICSR,
clock_pcctwo_sc->sc_clock_lvl);
hardclock(frame);
clock_profcnt.ev_count++;
return (1);
}
int
clock_pcctwo_statintr(frame)
void *frame;
{
/* Disable the timer interrupt while we handle it. */
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_ICSR, 0);
statclock((struct clockframe *) frame);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_CONTROL, PCCTWO_TT_CTRL_COVF);
pcc2_reg_write32(sys_pcctwo, PCC2REG_TIMER2_COUNTER, 0);
pcc2_reg_write32(sys_pcctwo, PCC2REG_TIMER2_COMPARE,
PCCTWO_US2LIM(CLOCK_NEWINT(clock_statvar, clock_statmin)));
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_CONTROL,
PCCTWO_TT_CTRL_CEN | PCCTWO_TT_CTRL_COC);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_ICSR,
clock_pcctwo_sc->sc_clock_lvl);
clock_statcnt.ev_count++;
return (1);
}
/* ARGSUSED */
void
clock_pcctwo_shutdown(arg)
void *arg;
{
/* Make sure the timer interrupts are turned off. */
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER1_CONTROL, PCCTWO_TT_CTRL_COVF);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER1_ICSR, 0);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_CONTROL, PCCTWO_TT_CTRL_COVF);
pcc2_reg_write(sys_pcctwo, PCC2REG_TIMER2_ICSR, 0);
}