/*-
 * Copyright (c) 2013 Takanori Watanabe
 * 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/kernel.h>
#include <sys/bus.h>

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

#include "acpi_if.h"
#include <sys/module.h>
#include <dev/acpica/acpivar.h>
#include <sys/sysctl.h>
static int sysctl_acpi_rapidstart_gen_handler(SYSCTL_HANDLER_ARGS);

static struct acpi_rapidstart_name_list
{
        char *nodename;
        char *getmethod;
        char *setmethod;
        char *comment;
} acpi_rapidstart_oids[] ={
        {"ffs","GFFS","SFFS","Flash Fast Store Flag"},
        {"ftv","GFTV","SFTV","Time value"},
        {NULL, NULL, NULL, NULL}
};

struct acpi_rapidstart_softc {
        struct sysctl_ctx_list  *sysctl_ctx;
        struct sysctl_oid       *sysctl_tree;

};
static char    *rapidstart_ids[] = {"INT3392", NULL};
static int
acpi_rapidstart_probe(device_t dev)
{
        int rv;

        if (acpi_disabled("rapidstart") ||
            device_get_unit(dev) != 0)
                return (ENXIO);
        rv = ACPI_ID_PROBE(device_get_parent(dev), dev, rapidstart_ids, NULL);
        if (rv <= 0)
                device_set_desc(dev, "Intel Rapid Start ACPI device");

        return (rv);

}

static int
acpi_rapidstart_attach(device_t dev)
{
        struct acpi_rapidstart_softc *sc;
        int i;

        sc = device_get_softc(dev);

        sc->sysctl_ctx = device_get_sysctl_ctx(dev);
        sc->sysctl_tree = device_get_sysctl_tree(dev);
        for (i = 0 ; acpi_rapidstart_oids[i].nodename != NULL; i++){
                if (acpi_rapidstart_oids[i].setmethod != NULL) {
                        SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
                            SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                            i, acpi_rapidstart_oids[i].nodename,
                            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
                            dev, i, sysctl_acpi_rapidstart_gen_handler, "I",
                            acpi_rapidstart_oids[i].comment);
                } else {
                        SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
                            SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
                            i, acpi_rapidstart_oids[i].nodename,
                            CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
                            dev, i, sysctl_acpi_rapidstart_gen_handler, "I",
                            acpi_rapidstart_oids[i].comment);
                }
        }
        return (0);
}

static int 
sysctl_acpi_rapidstart_gen_handler(SYSCTL_HANDLER_ARGS)
{
        device_t        dev = arg1;
        int     function = oidp->oid_arg2;
        int             error = 0, val;

        acpi_GetInteger(acpi_get_handle(dev),
            acpi_rapidstart_oids[function].getmethod, &val);
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error || !req->newptr || !acpi_rapidstart_oids[function].setmethod)
                return (error);
        acpi_SetInteger(acpi_get_handle(dev),
            acpi_rapidstart_oids[function].setmethod, val);
        return (0);
}

static device_method_t acpi_rapidstart_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe, acpi_rapidstart_probe),
        DEVMETHOD(device_attach, acpi_rapidstart_attach),

        DEVMETHOD_END
};

static driver_t acpi_rapidstart_driver = {
        "acpi_rapidstart",
        acpi_rapidstart_methods,
        sizeof(struct acpi_rapidstart_softc),
};

DRIVER_MODULE(acpi_rapidstart, acpi, acpi_rapidstart_driver, 0, 0);
MODULE_DEPEND(acpi_rapidstart, acpi, 1, 1, 1);