/*      $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;
}