/*      $NetBSD: button.c,v 1.1 2018/04/09 20:07:22 christos Exp $ */

/*-
* Copyright (c) 2009 Michael Lorenz
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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: button.c,v 1.1 2018/04/09 20:07:22 christos Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/kthread.h>

#include <sys/bus.h>

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

#include <machine/autoconf.h>
#include <machine/machtype.h>

#include <sgimips/ioc/iocreg.h>
#include <sgimips/hpc/hpcvar.h>
#include <sgimips/hpc/hpcreg.h>

struct button_softc {
       device_t sc_dev;
       struct sysmon_pswitch sc_pbutton;
       bus_space_tag_t sc_tag;
       bus_space_handle_t sc_hreg;
       int sc_last, sc_fired;
};

static int button_match(device_t, cfdata_t, void *);
static void button_attach(device_t, device_t, void *);

static int button_intr(void *);
static void button_powerbutton(void *);

CFATTACH_DECL_NEW(button, sizeof(struct button_softc),
                               button_match,
                               button_attach,
                               NULL,
                               NULL);

static int
button_match(device_t parent, cfdata_t match, void *aux)
{
       struct hpc_attach_args *ha = aux;

       if (strcmp(ha->ha_name, match->cf_name) != 0)
               return 0;

       if (mach_type == MACH_SGI_IP22)
               return 1;

       return 0;
}

static void
button_attach(device_t parent, device_t self, void *aux)
{
       struct button_softc *sc;
       struct hpc_attach_args *haa;

       sc = device_private(self);
       sc->sc_dev = self;
       haa = aux;
       sc->sc_tag = haa->ha_st;
       sc->sc_fired = 0;

       aprint_normal("\n");
       if (bus_space_subregion(haa->ha_st, haa->ha_sh, haa->ha_devoff,
                       0x4,            /* just a single register */
                       &sc->sc_hreg)) {
               aprint_error(": unable to map button register\n");
               return;
       }

       if ((cpu_intr_establish(haa->ha_irq, IPL_BIO,
            button_intr, sc)) == NULL) {
               printf(": unable to establish interrupt!\n");
               return;
       }

       sc->sc_last = 0;

       sysmon_task_queue_init();
       memset(&sc->sc_pbutton, 0, sizeof(struct sysmon_pswitch));
       sc->sc_pbutton.smpsw_name = device_xname(sc->sc_dev);
       sc->sc_pbutton.smpsw_type = PSWITCH_TYPE_POWER;
       if (sysmon_pswitch_register(&sc->sc_pbutton) != 0)
               aprint_error_dev(sc->sc_dev,
                   "unable to register power button with sysmon\n");
       pmf_device_register(self, NULL, NULL);
}

static int
button_intr(void *cookie)
{
       struct button_softc *sc = cookie;
       uint8_t reg;

       reg = bus_space_read_4(sc->sc_tag, sc->sc_hreg, 0);
       bus_space_write_4(sc->sc_tag, sc->sc_hreg, 0,
           IOC_PANEL_VDOWN_IRQ | IOC_PANEL_VUP_IRQ | IOC_PANEL_POWER_IRQ);
       if ((reg & IOC_PANEL_POWER_IRQ) == 0) {
               if (!sc->sc_fired)
                       sysmon_task_queue_sched(0, button_powerbutton, sc);
               sc->sc_fired = 1;
       }
       if (time_second == sc->sc_last)
               return 1;
       sc->sc_last = time_second;
       if ((reg & IOC_PANEL_VDOWN_HOLD) == 0)
               pmf_event_inject(NULL, PMFE_AUDIO_VOLUME_DOWN);
       if ((reg & IOC_PANEL_VUP_HOLD) == 0)
               pmf_event_inject(NULL, PMFE_AUDIO_VOLUME_UP);

       return 1;
}

static void
button_powerbutton(void *cookie)
{
       struct button_softc *sc = cookie;

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