/*	$NetBSD: pwrsw_obio.c,v 1.1 2006/09/01 21:26:18 uwe Exp $	*/

/*-
 * Copyright (c) 2005 NONAKA Kimihiro
 * 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 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 "btn_obio.h"

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pwrsw_obio.c,v 1.1 2006/09/01 21:26:18 uwe Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/ioctl.h>

#include <dev/sysmon/sysmonvar.h>
#include <dev/sysmon/sysmon_taskq.h>

#include <sh3/devreg.h>

#include <landisk/landisk/landiskreg.h>
#include <landisk/dev/obiovar.h>

struct pwrsw_obio_softc {
	struct device		sc_dev;
	void			*sc_ih;

	struct sysmon_pswitch	sc_smpsw; /* our sysmon glue */

	int			sc_flags;
#define	SYSMON_ATTACHED	1
};

static int pwrsw_obio_probe(struct device *, struct cfdata *, void *);
static void pwrsw_obio_attach(struct device *, struct device *, void *);

static int pwrsw_intr(void *aux);
static void pwrsw_pressed_event(void *arg);

CFATTACH_DECL(pwrsw_obio, sizeof(struct pwrsw_obio_softc),
    pwrsw_obio_probe, pwrsw_obio_attach, NULL, NULL);

static struct pwrsw_obio_softc *pwrsw_softc;

static int
pwrsw_obio_probe(struct device *parent, struct cfdata *cfp, void *aux)
{
	struct obio_attach_args *oa = aux;

	if (pwrsw_softc)
		return (0);

	oa->oa_nio = 0;
	oa->oa_niomem = 0;
	oa->oa_nirq = 1;
	oa->oa_irq[0].or_irq = LANDISK_INTR_PWRSW;

	return (1);
}

static void
pwrsw_obio_attach(struct device *parent, struct device *self, void *aux)
{
	struct pwrsw_obio_softc *sc = (void *)self;

	printf(": Power Switch\n");

	pwrsw_softc = sc;

	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER;

	sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY,
	    pwrsw_intr, sc);
	if (sc->sc_ih == NULL) {
		printf("%s: couldn't establish intr handler",
		    sc->sc_dev.dv_xname);
		panic("extintr_establish");
	}

	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
		printf("%s: unable to register with sysmon\n",
		    sc->sc_dev.dv_xname);
		return;
	}
	sc->sc_flags |= SYSMON_ATTACHED;
}

static int
pwrsw_intr(void *arg)
{
	struct pwrsw_obio_softc *sc = (void *)arg;
	int status;

	status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
	if (status == -1) {
		return (0);
	}

	status = ~status;
	if (status & BTN_POWER_BIT) {
		if (sc->sc_flags & SYSMON_ATTACHED) {
			sysmon_task_queue_sched(0, pwrsw_pressed_event, sc);
			extintr_disable(sc->sc_ih);
#if NBTN_OBIO > 0
			extintr_disable_by_num(LANDISK_INTR_BTN);
#endif
		} else {
			printf("%s: pressed\n", sc->sc_dev.dv_xname);
		}
		_reg_write_1(LANDISK_PWRSW_INTCLR, 1);
		return (1);
	}
	return (0);
}

static void
pwrsw_pressed_event(void *arg)
{
	struct pwrsw_obio_softc *sc = (void *)arg;

	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
}