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/* $OpenBSD: qcpon.c,v 1.4 2023/04/24 14:34:13 patrick Exp $ */
/*
* Copyright (c) 2022 Patrick Wildt <patrick@blueri.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/task.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/fdt/spmivar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_clock.h>
#include <dev/ofw/ofw_power.h>
#include <dev/ofw/fdt.h>
struct qcpon_softc {
struct device sc_dev;
int sc_node;
spmi_tag_t sc_tag;
int8_t sc_sid;
void *sc_pwrkey_ih;
int sc_pwrkey_debounce;
struct task sc_powerdown_task;
};
int qcpon_match(struct device *, void *, void *);
void qcpon_attach(struct device *, struct device *, void *);
int qcpon_pwrkey_intr(void *);
void qcpon_powerdown_task(void *);
const struct cfattach qcpon_ca = {
sizeof(struct qcpon_softc), qcpon_match, qcpon_attach
};
struct cfdriver qcpon_cd = {
NULL, "qcpon", DV_DULL
};
int
qcpon_match(struct device *parent, void *match, void *aux)
{
struct spmi_attach_args *saa = aux;
return (OF_is_compatible(saa->sa_node, "qcom,pm8998-pon") ||
OF_is_compatible(saa->sa_node, "qcom,pmk8350-pon"));
}
void
qcpon_attach(struct device *parent, struct device *self, void *aux)
{
struct spmi_attach_args *saa = aux;
struct qcpon_softc *sc = (struct qcpon_softc *)self;
int node;
sc->sc_node = saa->sa_node;
sc->sc_tag = saa->sa_tag;
sc->sc_sid = saa->sa_sid;
task_set(&sc->sc_powerdown_task, qcpon_powerdown_task, sc);
printf("\n");
for (node = OF_child(saa->sa_node); node; node = OF_peer(node)) {
if (OF_is_compatible(node, "qcom,pmk8350-pwrkey")) {
sc->sc_pwrkey_ih = fdt_intr_establish(node,
IPL_BIO | IPL_WAKEUP, qcpon_pwrkey_intr, sc,
sc->sc_dev.dv_xname);
if (sc->sc_pwrkey_ih == NULL) {
printf("%s: can't establish interrupt\n",
sc->sc_dev.dv_xname);
continue;
}
#ifdef SUSPEND
device_register_wakeup(&sc->sc_dev);
#endif
}
}
}
int
qcpon_pwrkey_intr(void *arg)
{
struct qcpon_softc *sc = arg;
#ifdef SUSPEND
extern int cpu_suspended;
#endif
/* Ignore presses, handle releases. */
sc->sc_pwrkey_debounce = (sc->sc_pwrkey_debounce + 1) % 2;
if (sc->sc_pwrkey_debounce == 1)
return 1;
#ifdef SUSPEND
if (cpu_suspended)
cpu_suspended = 0;
else
#endif
task_add(systq, &sc->sc_powerdown_task);
return 1;
}
void
qcpon_powerdown_task(void *arg)
{
extern int allowpowerdown;
if (allowpowerdown == 1) {
allowpowerdown = 0;
prsignal(initprocess, SIGUSR2);
}
}
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