/*      $NetBSD: btn_obio.c,v 1.5 2023/12/20 13:55:17 thorpej Exp $     */

/*-
* Copyright (C) 2005, 2006 NONAKA Kimihiro <[email protected]>
* 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 ``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 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: btn_obio.c,v 1.5 2023/12/20 13:55:17 thorpej Exp $");

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

#include <arm/xscale/i80321var.h>

#include <sys/bus.h>
#include <machine/intr.h>

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

#include <evbarm/hdl_g/hdlgreg.h>
#include <evbarm/hdl_g/obiovar.h>

struct btn_obio_softc {
       device_t                sc_dev;
       bus_space_tag_t         sc_iot;
       bus_space_handle_t      sc_ioh;
       void                    *sc_ih;

       struct sysmon_pswitch   sc_smpsw[2];

       int                     sc_mask;
};

static int btn_obio_match(device_t, cfdata_t, void *);
static void btn_obio_attach(device_t, device_t, void *);

static int btn_intr(void *aux);
static void btn_sysmon_pressed_event(void *arg);

CFATTACH_DECL_NEW(btn_obio, sizeof(struct btn_obio_softc),
   btn_obio_match, btn_obio_attach, NULL, NULL);

static int
btn_obio_match(device_t parent, cfdata_t cf, void *aux)
{

       /* We take it on faith that the device is there. */
       return 1;
}

static void
btn_obio_attach(device_t parent, device_t self, void *aux)
{
       struct obio_attach_args *oba = aux;
       struct btn_obio_softc *sc = device_private(self);
       int error;

       sc->sc_dev = self;
       sc->sc_iot = oba->oba_st;
       error = bus_space_map(sc->sc_iot, oba->oba_addr, 1, 0, &sc->sc_ioh);
       if (error) {
               aprint_error(": failed to map registers: %d\n", error);
               return;
       }

       sysmon_power_settype("landisk");
       sysmon_task_queue_init();

       /* power switch */
       sc->sc_smpsw[0].smpsw_name = device_xname(self);
       sc->sc_smpsw[0].smpsw_type = PSWITCH_TYPE_POWER;
       if (sysmon_pswitch_register(&sc->sc_smpsw[0]) != 0) {
               aprint_error(": unable to register power button with sysmon\n");
               return;
       }
       sc->sc_mask |= BTNSTAT_POWER;
       hdlg_enable_pldintr(INTEN_PWRSW);

       /* reset button */
       sc->sc_smpsw[1].smpsw_name = device_xname(self);
       sc->sc_smpsw[1].smpsw_type = PSWITCH_TYPE_RESET;
       if (sysmon_pswitch_register(&sc->sc_smpsw[1]) != 0) {
               aprint_error(": unable to register reset button with sysmon\n");
               return;
       }
       sc->sc_mask |= BTNSTAT_RESET;

       sc->sc_ih = i80321_intr_establish(oba->oba_irq, IPL_TTY, btn_intr, sc);
       if (sc->sc_ih == NULL) {
               aprint_error(": couldn't establish intr handler");
               return;
       }
       hdlg_enable_pldintr(INTEN_BUTTON);

       aprint_normal("\n");
}

static int
btn_intr(void *arg)
{
       struct btn_obio_softc *sc = (void *)arg;
       int status;
       int rv;

       status = (int8_t)bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0);
       if (status == -1) {
               return 0;
       }

       rv = 0;
       status = ~status;
       if (status & BTNSTAT_POWER) {
               if (sc->sc_mask & BTNSTAT_POWER) {
                       hdlg_disable_pldintr(INTEN_PWRSW|INTEN_BUTTON);
                       i80321_intr_disestablish(sc->sc_ih);
                       sc->sc_ih = NULL;
                       sysmon_task_queue_sched(0, btn_sysmon_pressed_event,
                           &sc->sc_smpsw[0]);
               } else {
                       aprint_error("%s: power button pressed\n",
                           device_xname(sc->sc_dev));
               }
               rv = 1;
       } else if (status & BTNSTAT_RESET) {
               if (sc->sc_mask & BTNSTAT_RESET) {
                       hdlg_disable_pldintr(INTEN_PWRSW|INTEN_BUTTON);
                       i80321_intr_disestablish(sc->sc_ih);
                       sc->sc_ih = NULL;
                       sysmon_task_queue_sched(0, btn_sysmon_pressed_event,
                           &sc->sc_smpsw[1]);
               } else {
                       aprint_error("%s: reset button pressed\n",
                           device_xname(sc->sc_dev));
               }
               rv = 1;
       }

       return rv;
}

static void
btn_sysmon_pressed_event(void *arg)
{
       struct sysmon_pswitch *smpsw = (void *)arg;

       sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED);
}

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