/*-
 * Copyright (c) 2016 Oleksandr Tymoshenko <gonzo@FreeBSD.org>
 * All rights reserved.
 *
 * 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 AUTHOR 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 AUTHOR 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>
#include "opt_acpi.h"

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/rman.h>

#include <machine/bus.h>
#include <machine/resource.h>

#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>

#include <dev/acpica/acpivar.h>
#include <dev/iicbus/iiconf.h>

#include <dev/ichiic/ig4_reg.h>
#include <dev/ichiic/ig4_var.h>

static int      ig4iic_acpi_probe(device_t dev);
static int      ig4iic_acpi_attach(device_t dev);
static int      ig4iic_acpi_detach(device_t dev);

static char *ig4iic_ids[] = {
        "INT33C2",
        "INT33C3",
        "INT3432",
        "INT3433",
        "INT3446",
        "80860F41",
        "808622C1",
        "AMDI0510",
        "AMDI0010",
        "AMD0010",
        "APMC0D0F",
        NULL
};

static int
ig4iic_acpi_probe(device_t dev)
{
        int rv;

        if (acpi_disabled("ig4iic"))
                return (ENXIO);
        rv = ACPI_ID_PROBE(device_get_parent(dev), dev, ig4iic_ids, NULL);
        if (rv > 0)
                return (rv);

        device_set_desc(dev, "Designware I2C Controller");
        return (rv);
}

static int
ig4iic_acpi_attach(device_t dev)
{
        ig4iic_softc_t  *sc;
        char *str;
        int error;

        sc = device_get_softc(dev);

        sc->dev = dev;
        error = ACPI_ID_PROBE(device_get_parent(dev), dev, ig4iic_ids, &str);
        if (error > 0)
                return (error);
        if (strcmp(str, "APMC0D0F") == 0) {
                sc->version = IG4_EMAG;
        } else {
                /* All the other HIDs matched are Atom SOCs. */
                sc->version = IG4_ATOM;
        }
        sc->regs_rid = 0;
        sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
                                          &sc->regs_rid, RF_ACTIVE);
        if (sc->regs_res == NULL) {
                device_printf(dev, "unable to map registers\n");
                ig4iic_acpi_detach(dev);
                return (ENXIO);
        }
        sc->intr_rid = 0;
        sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
                                          &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);
        if (sc->intr_res == NULL) {
                device_printf(dev, "unable to map interrupt\n");
                ig4iic_acpi_detach(dev);
                return (ENXIO);
        }
        sc->platform_attached = true;

        error = ig4iic_attach(sc);
        if (error)
                ig4iic_acpi_detach(dev);

        return (error);
}

static int
ig4iic_acpi_detach(device_t dev)
{
        ig4iic_softc_t *sc = device_get_softc(dev);
        int error;

        if (sc->platform_attached) {
                error = ig4iic_detach(sc);
                if (error)
                        return (error);
                sc->platform_attached = false;
        }

        if (sc->intr_res) {
                bus_release_resource(dev, SYS_RES_IRQ,
                                     sc->intr_rid, sc->intr_res);
                sc->intr_res = NULL;
        }
        if (sc->regs_res) {
                bus_release_resource(dev, SYS_RES_MEMORY,
                                     sc->regs_rid, sc->regs_res);
                sc->regs_res = NULL;
        }

        return (0);
}

static int
ig4iic_acpi_suspend(device_t dev)
{
        ig4iic_softc_t *sc = device_get_softc(dev);

        return (ig4iic_suspend(sc));
}

static int
ig4iic_acpi_resume(device_t dev)
{
        ig4iic_softc_t *sc  = device_get_softc(dev);

        return (ig4iic_resume(sc));
}

static device_method_t ig4iic_acpi_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe, ig4iic_acpi_probe),
        DEVMETHOD(device_attach, ig4iic_acpi_attach),
        DEVMETHOD(device_detach, ig4iic_acpi_detach),
        DEVMETHOD(device_suspend, ig4iic_acpi_suspend),
        DEVMETHOD(device_resume, ig4iic_acpi_resume),

        /* Bus interface */
        DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
        DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
        DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
        DEVMETHOD(bus_release_resource, bus_generic_release_resource),
        DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
        DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
        DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),

        /* iicbus interface */
        DEVMETHOD(iicbus_transfer, ig4iic_transfer),
        DEVMETHOD(iicbus_reset, ig4iic_reset),
        DEVMETHOD(iicbus_callback, ig4iic_callback),

        DEVMETHOD_END
};

static driver_t ig4iic_acpi_driver = {
        "ig4iic",
        ig4iic_acpi_methods,
        sizeof(struct ig4iic_softc),
};

DRIVER_MODULE_ORDERED(ig4iic, acpi, ig4iic_acpi_driver, 0, 0, SI_ORDER_ANY);
MODULE_DEPEND(ig4iic, acpi, 1, 1, 1);
ACPI_PNP_INFO(ig4iic_ids);