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/* $OpenBSD: power.c,v 1.11 2022/03/13 08:04:38 mpi Exp $ */
/*
* Copyright (c) 2003 Michael Shalayeff
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR OR HIS RELATIVES 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 MIND, 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 <sys/param.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kthread.h>
#include <machine/reg.h>
#include <machine/pdc.h>
#include <machine/autoconf.h>
#include <hppa/dev/cpudevs.h>
struct power_softc {
struct device sc_dev;
void *sc_ih;
struct proc *sc_thread;
void (*sc_kicker)(void *);
int sc_dr_cnt;
paddr_t sc_pwr_reg;
volatile int sc_interrupted;
};
int powermatch(struct device *, void *, void *);
void powerattach(struct device *, struct device *, void *);
const struct cfattach power_ca = {
sizeof(struct power_softc), powermatch, powerattach
};
struct cfdriver power_cd = {
NULL, "power", DV_DULL
};
void power_thread_create(void *v);
void power_thread_dr(void *v);
void power_thread_reg(void *v);
void power_cold_hook_reg(int);
int power_intr(void *);
int
powermatch(struct device *parent, void *cfdata, void *aux)
{
struct cfdata *cf = cfdata;
struct confargs *ca = aux;
if (cf->cf_unit > 0 && !strcmp(ca->ca_name, "power"))
return (0);
return (1);
}
void
powerattach(struct device *parent, struct device *self, void *aux)
{
struct power_softc *sc = (struct power_softc *)self;
struct confargs *ca = aux;
switch (cpu_hvers) {
case HPPA_BOARD_HP712_60:
case HPPA_BOARD_HP712_80:
case HPPA_BOARD_HP712_100:
case HPPA_BOARD_HP712_120:
sc->sc_kicker = power_thread_dr;
printf(": DR25\n");
break;
default:
if (ca->ca_hpa) {
extern void (*cold_hook)(int);
sc->sc_pwr_reg = ca->ca_hpa;
cold_hook = power_cold_hook_reg;
sc->sc_kicker = power_thread_reg;
printf("\n");
} else
printf(": not available\n");
break;
}
if (ca->ca_irq >= 0)
sc->sc_ih = cpu_intr_establish(IPL_CLOCK, ca->ca_irq,
power_intr, sc, sc->sc_dev.dv_xname);
if (sc->sc_kicker)
kthread_create_deferred(power_thread_create, sc);
}
int
power_intr(void *v)
{
struct power_softc *sc = v;
sc->sc_interrupted = 1;
return (1);
}
void
power_thread_create(void *v)
{
struct power_softc *sc = v;
if (kthread_create(sc->sc_kicker, sc, &sc->sc_thread,
sc->sc_dev.dv_xname))
printf("WARNING: failed to create kernel power thread\n");
}
void
power_thread_dr(void *v)
{
struct power_softc *sc = v;
u_int32_t r;
for (;;) {
mfcpu(DR0_PCXL_SHINT_EN, r); /* XXX don't ask */
if (r & 0x80000000)
sc->sc_dr_cnt = 0;
else
sc->sc_dr_cnt++;
/*
* the bit is undampened straight wire from the power
* switch and thus we have do dampen it ourselves.
*/
if (sc->sc_dr_cnt == hz / 10)
prsignal(initprocess, SIGUSR2);
tsleep_nsec(v, PWAIT, "drpower", MSEC_TO_NSEC(100));
}
}
void
power_thread_reg(void *v)
{
struct power_softc *sc = v;
u_int32_t r;
for (;;) {
__asm volatile("ldwas 0(%1), %0"
: "=&r" (r) : "r" (sc->sc_pwr_reg));
if (!(r & 1))
prsignal(initprocess, SIGUSR2);
tsleep_nsec(v, PWAIT, "regpower", MSEC_TO_NSEC(100));
}
}
void
power_cold_hook_reg(int on)
{
extern struct pdc_power_info pdc_power_info; /* machdep.c */
int error;
if ((error = pdc_call((iodcio_t)pdc, 0, PDC_SOFT_POWER,
PDC_SOFT_POWER_ENABLE, &pdc_power_info,
on == HPPA_COLD_HOT)))
printf("power_cold_hook_reg: failed (%d)\n", error);
}
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