/*      $NetBSD: pwctl.c,v 1.20 2012/10/27 17:18:17 chs Exp $   */

/*-
 * Copyright (c) 1999-2001
 *         TAKEMURA Shin and PocketBSD Project. All rights reserved.
 * Copyright (c) 2000,2001
 *         SATO Kazumi. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the PocketBSD project
 *      and its contributors.
 * 4. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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: pwctl.c,v 1.20 2012/10/27 17:18:17 chs Exp $");

#ifdef _KERNEL_OPT
#include "opt_pwctl.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/reboot.h>

#include <sys/bus.h>
#include <machine/config_hook.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <dev/hpc/hpciovar.h>

#include "locators.h"

#ifdef PWCTLDEBUG
#ifndef PWCTLDEBUG_CONF
#define PWCTLDEBUG_CONF 0
#endif
int     pwctl_debug = PWCTLDEBUG_CONF;
#define DPRINTF(arg) if (pwctl_debug) printf arg;
#define VPRINTF(arg) if (bootverbose) printf arg;
#else
#define DPRINTF(arg)
#define VPRINTF(arg) if (bootverbose) printf arg;
#endif

struct pwctl_softc {
        hpcio_chip_t sc_hc;
        int sc_port;
        long sc_id;
        int sc_on, sc_off;
        config_hook_tag sc_hook_tag;
        config_hook_tag sc_hook_hardpower;
        config_hook_tag sc_ghook_tag;
        int sc_save;
        int sc_initvalue;
};

static int      pwctl_match(device_t, cfdata_t, void *);
static void     pwctl_attach(device_t, device_t, void *);
static int      pwctl_hook(void *, int, long, void *);
static int      pwctl_ghook(void *, int, long, void *);
int     pwctl_hardpower(void *, int, long, void *);

CFATTACH_DECL_NEW(pwctl, sizeof(struct pwctl_softc),
    pwctl_match, pwctl_attach, NULL, NULL);

int
pwctl_match(device_t parent, cfdata_t match, void *aux)
{
        struct hpcio_attach_args *haa = aux;
        platid_mask_t mask;

        if (strcmp(haa->haa_busname, HPCIO_BUSNAME))
                return (0);
        if (match->cf_loc[HPCIOIFCF_PLATFORM] == 0)
                return (0);
        mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
        if (!platid_match(&platid, &mask))
                return (0);
        return (1);
}

void
pwctl_attach(device_t parent, device_t self, void *aux)
{
        struct hpcio_attach_args *haa = aux;
        int *loc;
        struct pwctl_softc *sc = device_private(self);

        loc = device_cfdata(self)->cf_loc;
        sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, loc[HPCIOIFCF_IOCHIP]);
        sc->sc_port = loc[HPCIOIFCF_PORT];
        sc->sc_id = loc[HPCIOIFCF_ID];
        sc->sc_on = loc[HPCIOIFCF_ACTIVE] ? 1 : 0;
        sc->sc_off = loc[HPCIOIFCF_ACTIVE] ? 0 : 1;
        sc->sc_initvalue = loc[HPCIOIFCF_INITVALUE];

        printf(" port=%d id=%ld on=%d%s",
            sc->sc_port, sc->sc_id, sc->sc_on,
            sc->sc_initvalue == -1 ? "" :
            sc->sc_initvalue ? " init=on" : " init=off");

        if (sc->sc_port == HPCIOIFCF_PORT_DEFAULT ||
            sc->sc_id == HPCIOIFCF_ID_DEFAULT) {
                printf(" (ignored)");
        } else {
                sc->sc_hook_tag = config_hook(CONFIG_HOOK_POWERCONTROL,
                    sc->sc_id, CONFIG_HOOK_SHARE, pwctl_hook, sc);
                sc->sc_ghook_tag = config_hook(CONFIG_HOOK_GET,
                    sc->sc_id, CONFIG_HOOK_SHARE, pwctl_ghook, sc);
                sc->sc_hook_hardpower = config_hook(CONFIG_HOOK_PMEVENT,
                    CONFIG_HOOK_PMEVENT_HARDPOWER, CONFIG_HOOK_SHARE,
                    pwctl_hardpower, sc);
        }

        if (sc->sc_initvalue != -1)
                hpcio_portwrite(sc->sc_hc, sc->sc_port,
                    sc->sc_initvalue ? sc->sc_on : sc->sc_off);
        printf("\n");
}

int
pwctl_hook(void *ctx, int type, long id, void *msg)
{
        struct pwctl_softc *sc = ctx;

        DPRINTF(("pwctl hook: port %d %s(%d)", sc->sc_port,
            msg ? "ON" : "OFF", msg ? sc->sc_on : sc->sc_off));
        hpcio_portwrite(sc->sc_hc, sc->sc_port,
            msg ? sc->sc_on : sc->sc_off);

        return (0);
}

int
pwctl_ghook(void *ctx, int type, long id, void *msg)
{
        struct pwctl_softc *sc = ctx;

        if (CONFIG_HOOK_VALUEP(msg))
                return (1);

        *(int*)msg = hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_on;
        DPRINTF(("pwctl ghook: port %d %s(%d)", sc->sc_port,
            *(int*)msg? "ON" : "OFF", *(int*)msg ? sc->sc_on : sc->sc_off));

        return (0);
}

int
pwctl_hardpower(void *ctx, int type, long id, void *msg)
{
        struct pwctl_softc *sc = ctx;
        int why =(int)msg;

        VPRINTF(("pwctl hardpower: port %d %s: %s(%d)\n", sc->sc_port,
            why == PWR_RESUME? "resume"
            : why == PWR_SUSPEND? "suspend" : "standby",
            sc->sc_save == sc->sc_on ? "on": "off", sc->sc_save));

        switch (why) {
        case PWR_STANDBY:
                break;
        case PWR_SUSPEND:
                sc->sc_save = hpcio_portread(sc->sc_hc, sc->sc_port);
                hpcio_portwrite(sc->sc_hc, sc->sc_port, sc->sc_off);
                break;
        case PWR_RESUME:
                hpcio_portwrite(sc->sc_hc, sc->sc_port, sc->sc_save);
                break;
        }

        return (0);
}