sys/dev/hpc/button.c

   1 /*      $NetBSD: button.c,v 1.14 2009/05/12 12:13:49 cegger Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1999-2001
   5  *         TAKEMURA Shin1 and PocketBSD Project. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the PocketBSD project
  18  *      and its contributors.
  19  * 4. Neither the name of the project nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: button.c,v 1.14 2009/05/12 12:13:49 cegger Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/device.h>
  43
  44 #include <sys/bus.h>
  45
  46 #include <machine/config_hook.h>
  47 #include <machine/platid.h>
  48 #include <machine/platid_mask.h>
  49
  50 #include <dev/hpc/hpciovar.h>
  51
  52 #include "locators.h"
  53
  54 struct button_softc {
  55         struct device sc_dev;
  56         hpcio_chip_t sc_hc;
  57         hpcio_intr_handle_t sc_intr_handle;
  58         int sc_port;
  59         long sc_id;
  60         int sc_active;
  61         config_hook_tag sc_hook_tag;
  62         config_hook_tag sc_ghook_tag;
  63 };
  64
  65 static int      button_match(device_t, cfdata_t, void *);
  66 static void     button_attach(device_t, device_t, void *);
  67 static int      button_intr(void *);
  68 static int      button_state(void *, int, long, void *);
  69
  70 CFATTACH_DECL(button, sizeof(struct button_softc),
  71     button_match, button_attach, NULL, NULL);
  72
  73 int
  74 button_match(device_t parent, cfdata_t match, void *aux)
  75 {
  76         struct hpcio_attach_args *haa = aux;
  77         platid_mask_t mask;
  78
  79         if (strcmp(haa->haa_busname, HPCIO_BUSNAME))
  80                 return (0);
  81         if (match->cf_loc[HPCIOIFCF_PLATFORM] == 0)
  82                 return (0);
  83         mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
  84         return (platid_match(&platid, &mask));
  85 }
  86
  87 void
  88 button_attach(device_t parent, device_t self, void *aux)
  89 {
  90         struct hpcio_attach_args *haa = aux;
  91         int *loc;
  92         struct button_softc *sc = (void*)self;
  93         int mode;
  94
  95         loc = device_cfdata(&sc->sc_dev)->cf_loc;
  96         sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, loc[HPCIOIFCF_IOCHIP]);
  97         sc->sc_port = loc[HPCIOIFCF_PORT];
  98         sc->sc_id = loc[HPCIOIFCF_ID];
  99         sc->sc_active = loc[HPCIOIFCF_ACTIVE];
 100         printf(" port=%d id=%ld active=%s",
 101             sc->sc_port, sc->sc_id, sc->sc_active ? "high" : "low");
 102
 103         mode = HPCIO_INTR_HOLD;
 104         if (loc[HPCIOIFCF_LEVEL] != HPCIOIFCF_LEVEL_DEFAULT) {
 105                 mode |= HPCIO_INTR_LEVEL;
 106                 if (loc[HPCIOIFCF_LEVEL] == 0)
 107                         mode |= HPCIO_INTR_LOW;
 108                 else
 109                         mode |= HPCIO_INTR_HIGH;
 110                 printf(" sense=level");
 111         } else {
 112                 mode |= HPCIO_INTR_EDGE;
 113                 switch (loc[HPCIOIFCF_EDGE]) {
 114                 case 1:
 115                         mode |= HPCIO_INTR_POSEDGE;
 116                         break;
 117                 case 2:
 118                         mode |= HPCIO_INTR_NEGEDGE;
 119                         break;
 120                 case 0:
 121                 case 3:
 122                 case HPCIOMANCF_EDGE_DEFAULT:
 123                         mode |= HPCIO_INTR_POSEDGE;
 124                         mode |= HPCIO_INTR_NEGEDGE;
 125                         break;
 126                 default:
 127                         printf("%s(%d): invalid configuration, edge=%d",
 128                             __FILE__, __LINE__, loc[HPCIOIFCF_EDGE]);
 129                         break;
 130                 }
 131                 printf(" sense=edge");
 132         }
 133
 134         if (sc->sc_port == HPCIOIFCF_PORT_DEFAULT ||
 135             sc->sc_id == HPCIOIFCF_ID_DEFAULT)
 136                 printf(" (ignored)");
 137         else
 138                 sc->sc_intr_handle =
 139                     hpcio_intr_establish(sc->sc_hc, sc->sc_port,
 140                         mode, button_intr, sc);
 141         sc->sc_ghook_tag = config_hook(CONFIG_HOOK_GET, sc->sc_id,
 142             CONFIG_HOOK_SHARE, button_state, sc);
 143         printf("\n");
 144 }
 145
 146 int
 147 button_state(void *ctx, int type, long id, void *msg)
 148 {
 149         struct button_softc *sc = ctx;
 150
 151         if (type != CONFIG_HOOK_GET || id != sc->sc_id)
 152                 return (1);
 153
 154         if (CONFIG_HOOK_VALUEP(msg))
 155                 return (1);
 156
 157         *(int*)msg = (hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_active);
 158         return (0);
 159 }
 160
 161 int
 162 button_intr(void *ctx)
 163 {
 164         struct button_softc *sc = ctx;
 165         int on;
 166
 167         on = (hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_active);
 168
 169         /* Clear interrupt */
 170         hpcio_intr_clear(sc->sc_hc, sc->sc_intr_handle);
 171
 172         config_hook_call(CONFIG_HOOK_BUTTONEVENT, sc->sc_id, (void*)on);
 173
 174         return (0);
 175 }