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/* $OpenBSD: acpicbkbd.c,v 1.3 2022/04/06 18:59:27 naddy Exp $ */
/*
* Copyright (c) 2016 joshua stein <jcs@openbsd.org>
*
* Permission to use, copy, modify, and/or 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/systm.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/amltypes.h>
#include <dev/acpi/dsdt.h>
#include <dev/wscons/wsconsio.h>
/* #define ACPICBKBD_DEBUG */
#ifdef ACPICBKBD_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif
#define ACPICBKBD_MAX_BACKLIGHT 100
struct acpicbkbd_softc {
struct device sc_dev;
struct acpi_softc *sc_acpi;
struct aml_node *sc_devnode;
uint64_t sc_backlight;
};
int acpicbkbd_match(struct device *, void *, void *);
void acpicbkbd_attach(struct device *, struct device *, void *);
int acpicbkbd_activate(struct device *, int);
int acpicbkbd_get_backlight(struct wskbd_backlight *);
int acpicbkbd_set_backlight(struct wskbd_backlight *);
void acpicbkbd_write_backlight(void *, int);
extern int (*wskbd_get_backlight)(struct wskbd_backlight *);
extern int (*wskbd_set_backlight)(struct wskbd_backlight *);
const struct cfattach acpicbkbd_ca = {
sizeof(struct acpicbkbd_softc),
acpicbkbd_match,
acpicbkbd_attach,
NULL,
acpicbkbd_activate,
};
struct cfdriver acpicbkbd_cd = {
NULL, "acpicbkbd", DV_DULL
};
const char *acpicbkbd_hids[] = {
"GOOG0002",
NULL
};
int
acpicbkbd_match(struct device *parent, void *match, void *aux)
{
struct acpi_attach_args *aaa = aux;
struct cfdata *cf = match;
return acpi_matchhids(aaa, acpicbkbd_hids, cf->cf_driver->cd_name);
}
void
acpicbkbd_attach(struct device *parent, struct device *self, void *aux)
{
struct acpicbkbd_softc *sc = (struct acpicbkbd_softc *)self;
struct acpi_attach_args *aa = aux;
sc->sc_acpi = (struct acpi_softc *)parent;
sc->sc_devnode = aa->aaa_node;
printf(": %s", sc->sc_devnode->name);
if (aml_evalinteger(sc->sc_acpi, sc->sc_devnode, "KBQC",
0, NULL, &sc->sc_backlight) == 0) {
wskbd_get_backlight = acpicbkbd_get_backlight;
wskbd_set_backlight = acpicbkbd_set_backlight;
} else
printf(", no backlight control");
printf("\n");
}
int
acpicbkbd_activate(struct device *self, int act)
{
struct acpicbkbd_softc *sc = (struct acpicbkbd_softc *)self;
switch (act) {
case DVACT_WAKEUP:
/* restore backlight to pre-suspend value */
acpi_addtask(sc->sc_acpi, acpicbkbd_write_backlight, sc, 0);
break;
}
return (0);
}
int
acpicbkbd_get_backlight(struct wskbd_backlight *kbl)
{
struct acpicbkbd_softc *sc = acpicbkbd_cd.cd_devs[0];
KASSERT(sc != NULL);
kbl->min = 0;
kbl->max = ACPICBKBD_MAX_BACKLIGHT;
kbl->curval = sc->sc_backlight;
return 0;
}
int
acpicbkbd_set_backlight(struct wskbd_backlight *kbl)
{
struct acpicbkbd_softc *sc = acpicbkbd_cd.cd_devs[0];
KASSERT(sc != NULL);
if (kbl->curval > ACPICBKBD_MAX_BACKLIGHT)
return EINVAL;
sc->sc_backlight = kbl->curval;
acpi_addtask(sc->sc_acpi, acpicbkbd_write_backlight, sc, 0);
acpi_wakeup(sc->sc_acpi);
return 0;
}
void
acpicbkbd_write_backlight(void *arg0, int arg1)
{
struct acpicbkbd_softc *sc = arg0;
struct aml_value arg;
DPRINTF(("%s: writing backlight of %lld\n", sc->sc_dev.dv_xname,
sc->sc_backlight));
memset(&arg, 0, sizeof(arg));
arg.type = AML_OBJTYPE_INTEGER;
arg.v_integer = sc->sc_backlight;
aml_evalname(sc->sc_acpi, sc->sc_devnode, "KBCM", 1, &arg, NULL);
}
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