/*      $NetBSD: button.c,v 1.16 2012/10/27 17:18:17 chs Exp $  */

/*-
* Copyright (c) 1999-2001
*         TAKEMURA Shin1 and PocketBSD Project. 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: button.c,v 1.16 2012/10/27 17:18:17 chs Exp $");

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

struct button_softc {
       hpcio_chip_t sc_hc;
       hpcio_intr_handle_t sc_intr_handle;
       int sc_port;
       long sc_id;
       int sc_active;
       config_hook_tag sc_hook_tag;
       config_hook_tag sc_ghook_tag;
};

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

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

int
button_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]);
       return (platid_match(&platid, &mask));
}

void
button_attach(device_t parent, device_t self, void *aux)
{
       struct hpcio_attach_args *haa = aux;
       int *loc;
       struct button_softc *sc = device_private(self);
       int mode;

       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_active = loc[HPCIOIFCF_ACTIVE];
       printf(" port=%d id=%ld active=%s",
           sc->sc_port, sc->sc_id, sc->sc_active ? "high" : "low");

       mode = HPCIO_INTR_HOLD;
       if (loc[HPCIOIFCF_LEVEL] != HPCIOIFCF_LEVEL_DEFAULT) {
               mode |= HPCIO_INTR_LEVEL;
               if (loc[HPCIOIFCF_LEVEL] == 0)
                       mode |= HPCIO_INTR_LOW;
               else
                       mode |= HPCIO_INTR_HIGH;
               printf(" sense=level");
       } else {
               mode |= HPCIO_INTR_EDGE;
               switch (loc[HPCIOIFCF_EDGE]) {
               case 1:
                       mode |= HPCIO_INTR_POSEDGE;
                       break;
               case 2:
                       mode |= HPCIO_INTR_NEGEDGE;
                       break;
               case 0:
               case 3:
               case HPCIOMANCF_EDGE_DEFAULT:
                       mode |= HPCIO_INTR_POSEDGE;
                       mode |= HPCIO_INTR_NEGEDGE;
                       break;
               default:
                       printf("%s(%d): invalid configuration, edge=%d",
                           __FILE__, __LINE__, loc[HPCIOIFCF_EDGE]);
                       break;
               }
               printf(" sense=edge");
       }

       if (sc->sc_port == HPCIOIFCF_PORT_DEFAULT ||
           sc->sc_id == HPCIOIFCF_ID_DEFAULT)
               printf(" (ignored)");
       else
               sc->sc_intr_handle =
                   hpcio_intr_establish(sc->sc_hc, sc->sc_port,
                       mode, button_intr, sc);
       sc->sc_ghook_tag = config_hook(CONFIG_HOOK_GET, sc->sc_id,
           CONFIG_HOOK_SHARE, button_state, sc);
       printf("\n");
}

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

       if (type != CONFIG_HOOK_GET || id != sc->sc_id)
               return (1);

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

       *(int*)msg = (hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_active);
       return (0);
}

int
button_intr(void *ctx)
{
       struct button_softc *sc = ctx;
       int on;

       on = (hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_active);

       /* Clear interrupt */
       hpcio_intr_clear(sc->sc_hc, sc->sc_intr_handle);

       config_hook_call(CONFIG_HOOK_BUTTONEVENT, sc->sc_id, (void*)on);

       return (0);
}