/* $NetBSD: acpi_button.c,v 1.43 2021/01/29 15:24:00 thorpej Exp $ */

/* $NetBSD: acpi_button.c,v 1.43 2021/01/29 15:24:00 thorpej Exp $ */

/*
* Copyright 2001, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/

/*
* ACPI Button driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_button.c,v 1.43 2021/01/29 15:24:00 thorpej Exp $");

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

#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_wakedev.h>

#define _COMPONENT ACPI_BUTTON_COMPONENT
ACPI_MODULE_NAME ("acpi_button")

#define ACPI_NOTIFY_BUTTON 0x80

struct acpibut_softc {
struct acpi_devnode *sc_node;
struct sysmon_pswitch sc_smpsw;
};

struct button_type {
const char *desc;
int type;
};

static const struct button_type power_button_type = {
.desc = "Power",
.type = PSWITCH_TYPE_POWER
};

static const struct button_type sleep_button_type = {
.desc = "Sleep",
.type = PSWITCH_TYPE_SLEEP
};

static const struct device_compatible_entry compat_data[] = {
{ .compat = "PNP0C0C", .data = &power_button_type },
{ .compat = "PNP0C0E", .data = &sleep_button_type },
DEVICE_COMPAT_EOL
};

static int acpibut_match(device_t, cfdata_t, void *);
static void acpibut_attach(device_t, device_t, void *);
static int acpibut_detach(device_t, int);
static void acpibut_pressed_event(void *);
static void acpibut_notify_handler(ACPI_HANDLE, uint32_t, void *);

CFATTACH_DECL_NEW(acpibut, sizeof(struct acpibut_softc),
acpibut_match, acpibut_attach, acpibut_detach, NULL);

/*
* acpibut_match:
*
* Autoconfiguration `match' routine.
*/
static int
acpibut_match(device_t parent, cfdata_t match, void *aux)
{
struct acpi_attach_args *aa = aux;

return acpi_compatible_match(aa, compat_data);
}

/*
* acpibut_attach:
*
* Autoconfiguration `attach' routine.
*/
static void
acpibut_attach(device_t parent, device_t self, void *aux)
{
struct acpibut_softc *sc = device_private(self);
struct acpi_attach_args *aa = aux;
const struct device_compatible_entry *dce;
const struct button_type *type;
struct acpi_wakedev *aw;

sc->sc_smpsw.smpsw_name = device_xname(self);

dce = acpi_compatible_lookup(aa, compat_data);
KASSERT(dce != NULL);
type = dce->data;

sc->sc_smpsw.smpsw_type = type->type;

aprint_naive(": ACPI %s Button\n", type->desc);
aprint_normal(": ACPI %s Button\n", type->desc);

sc->sc_node = aa->aa_node;
aw = sc->sc_node->ad_wakedev;

/*
* This GPE should always be enabled.
*/
if (aw != NULL)
(void)AcpiEnableGpe(aw->aw_handle, aw->aw_number);

(void)pmf_device_register(self, NULL, NULL);
(void)sysmon_pswitch_register(&sc->sc_smpsw);
(void)acpi_register_notify(sc->sc_node, acpibut_notify_handler);
}

/*
* acpibut_detach:
*
* Autoconfiguration `detach' routine.
*/
static int
acpibut_detach(device_t self, int flags)
{
struct acpibut_softc *sc = device_private(self);

pmf_device_deregister(self);
acpi_deregister_notify(sc->sc_node);
sysmon_pswitch_unregister(&sc->sc_smpsw);

return 0;
}

/*
* acpibut_pressed_event:
*
* Deal with a button being pressed.
*/
static void
acpibut_pressed_event(void *arg)
{
device_t dv = arg;
struct acpibut_softc *sc = device_private(dv);

aprint_debug_dev(dv, "button pressed\n");
sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
}

/*
* acpibut_notify_handler:
*
* Callback from ACPI interrupt handler to notify us of an event.
*/
static void
acpibut_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
{
static const int handler = OSL_NOTIFY_HANDLER;
device_t dv = context;

switch (notify) {

case ACPI_NOTIFY_BUTTON:
(void)AcpiOsExecute(handler, acpibut_pressed_event, dv);
break;

case ACPI_NOTIFY_DEVICE_WAKE:
break;

default:
aprint_debug_dev(dv, "unknown notify 0x%02X\n", notify);
}
}

MODULE(MODULE_CLASS_DRIVER, acpibut, "sysmon_power");

#ifdef _MODULE
#include "ioconf.c"
#endif

static int
acpibut_modcmd(modcmd_t cmd, void *aux)
{
int rv = 0;

switch (cmd) {

case MODULE_CMD_INIT:

#ifdef _MODULE
rv = config_init_component(cfdriver_ioconf_acpibut,
cfattach_ioconf_acpibut, cfdata_ioconf_acpibut);
#endif
break;

case MODULE_CMD_FINI:

#ifdef _MODULE
rv = config_fini_component(cfdriver_ioconf_acpibut,
cfattach_ioconf_acpibut, cfdata_ioconf_acpibut);
#endif
break;

default:
rv = ENOTTY;
}

return rv;
}