/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


#include <sys/types.h>
#include <sys/errno.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>

/*
 * Configuration information
 */

static int options_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
                void **result);
static int options_attach(dev_info_t *devi, ddi_attach_cmd_t cmd);
static int options_detach(dev_info_t *devi, ddi_detach_cmd_t cmd);
static dev_info_t *options_devi;

struct dev_ops  options_ops = {

        DEVO_REV,               /* devo_rev, */
        0,                      /* refcnt  */
        options_info,           /* info */
        nulldev,                /* identify */
        nulldev,                /* probe */
        options_attach,         /* attach */
        options_detach,         /* detach */
        nodev,                  /* reset */
        (struct cb_ops *)0,     /* driver operations */
        (struct bus_ops *)0,    /* bus operations */
        nulldev,                /* power */
        ddi_quiesce_not_needed,         /* quiesce */

};

/*
 * Autoload Data and Autoload Entry
 */

#include <sys/modctl.h>

extern struct mod_ops mod_driverops;
static struct modldrv modldrv = {
        &mod_driverops, /* Type of module. This one is a driver */
        "options driver",       /* Name of the module. */
        &options_ops,   /* driver ops */
};

static struct modlinkage modlinkage = {
        MODREV_1, (void *)&modldrv
};

/*
 * This is the driver initialization routine.
 */

int
_init()
{
        return (mod_install(&modlinkage));
}

int
_fini()
{
        return (EBUSY);
}

int
_info(modinfop)
        struct modinfo *modinfop;
{
        return (mod_info(&modlinkage, modinfop));
}

/* ARGSUSED */
static int
options_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
{
        register int error;

        switch (infocmd) {
        case DDI_INFO_DEVT2DEVINFO:
                if (options_devi == NULL) {
                        error = DDI_FAILURE;
                } else {
                        *result = (void *) options_devi;
                        error = DDI_SUCCESS;
                }
                break;
        case DDI_INFO_DEVT2INSTANCE:
                *result = (void *)0;
                error = DDI_SUCCESS;
                break;
        default:
                error = DDI_FAILURE;
        }
        return (error);
}

static int
options_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
        switch (cmd) {
        case DDI_ATTACH:
                options_devi = devi;
                return (DDI_SUCCESS);

        case DDI_RESUME:
                return (DDI_SUCCESS);

        default:
                return (DDI_FAILURE);
        }
}

/*ARGSUSED*/
static int
options_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
{
        switch (cmd) {
        case DDI_SUSPEND:
                return (DDI_SUCCESS);

        case DDI_DETACH:
        default:
                return (DDI_FAILURE);
        }
}