/* $NetBSD: acpi_ged.c,v 1.4 2022/01/11 10:53:08 jmcneill Exp $ */

/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jared McNeill <[email protected]>.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_ged.c,v 1.4 2022/01/11 10:53:08 jmcneill Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/kmem.h>

#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_event.h>
#include <dev/acpi/acpi_intr.h>

static int      acpi_ged_match(device_t, cfdata_t, void *);
static void     acpi_ged_attach(device_t, device_t, void *);

static void     acpi_ged_register_event(void *, struct acpi_event *, struct acpi_irq *);
static int      acpi_ged_intr(void *);

CFATTACH_DECL_NEW(acpiged, 0, acpi_ged_match, acpi_ged_attach, NULL, NULL);

static const struct device_compatible_entry compat_data[] = {
       { .compat = "ACPI0013" },
       DEVICE_COMPAT_EOL
};

static int
acpi_ged_match(device_t parent, cfdata_t cf, void *aux)
{
       struct acpi_attach_args *aa = aux;

       return acpi_compatible_match(aa, compat_data);
}

static void
acpi_ged_attach(device_t parent, device_t self, void *aux)
{
       struct acpi_attach_args * const aa = aux;
       ACPI_HANDLE handle = aa->aa_node->ad_handle;

       if (ACPI_FAILURE(acpi_event_create_int(self, handle, acpi_ged_register_event, self)))
               aprint_error_dev(self, "failed to create events\n");
}

static void
acpi_ged_register_event(void *priv, struct acpi_event *ev, struct acpi_irq *irq)
{
       device_t dev = priv;
       void *ih;

       ih = acpi_intr_establish_irq(dev, irq, IPL_VM, true,
           acpi_ged_intr, ev, device_xname(dev));
       if (ih == NULL) {
               aprint_error_dev(dev, "couldn't establish interrupt (irq %d)\n", irq->ar_irq);
               return;
       }
       acpi_event_set_intrcookie(ev, ih);
}

static int
acpi_ged_intr(void *priv)
{
       struct acpi_event * const ev = priv;

       acpi_event_notify(ev);

       return 1;
}