sys/arch/landisk/dev/btn_obio.c

   1 /*      $NetBSD: btn_obio.c,v 1.4 2008/03/27 02:40:14 uwe Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2005 NONAKA Kimihiro
   5  * 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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include "pwrsw_obio.h"
  30
  31 #include <sys/cdefs.h>
  32 __KERNEL_RCSID(0, "$NetBSD: btn_obio.c,v 1.4 2008/03/27 02:40:14 uwe Exp $");
  33
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38 #include <sys/malloc.h>
  39 #include <sys/kernel.h>
  40 #include <sys/conf.h>
  41 #include <sys/ioctl.h>
  42 #include <sys/callout.h>
  43
  44 #include <dev/sysmon/sysmonvar.h>
  45 #include <dev/sysmon/sysmon_taskq.h>
  46
  47 #include <sh3/devreg.h>
  48
  49 #include <machine/button.h>
  50
  51 #include <landisk/landisk/landiskreg.h>
  52 #include <landisk/dev/obiovar.h>
  53 #include <landisk/dev/buttonvar.h>
  54
  55 #define BTN_SELECT      0
  56 #define BTN_COPY        1
  57 #define BTN_REMOVE      2
  58 #define NBUTTON         3
  59
  60 struct btn_obio_softc {
  61         device_t                sc_dev;
  62         void                    *sc_ih;
  63
  64         struct callout          sc_guard_ch;
  65         struct sysmon_pswitch   sc_smpsw;       /* reset */
  66         struct btn_event        sc_bev[NBUTTON];
  67
  68         int                     sc_mask;
  69 };
  70
  71 #ifndef BTN_TIMEOUT
  72 #define BTN_TIMEOUT     (hz / 10)       /* 100ms */
  73 #endif
  74
  75 static int btn_obio_probe(device_t, cfdata_t, void *);
  76 static void btn_obio_attach(device_t, device_t, void *);
  77
  78 static int btn_intr(void *aux);
  79 static void btn_sysmon_pressed_event(void *arg);
  80 static void btn_pressed_event(void *arg);
  81 static void btn_guard_timeout(void *arg);
  82
  83 static struct btn_obio_softc *btn_softc;
  84
  85 static const struct {
  86         int idx;
  87         int mask;
  88         const char *name;
  89 } btnlist[NBUTTON] = {
  90         { BTN_SELECT,   BTN_SELECT_BIT, "select" },
  91         { BTN_COPY,     BTN_COPY_BIT,   "copy"   },
  92         { BTN_REMOVE,   BTN_REMOVE_BIT, "remove" },
  93 };
  94
  95 CFATTACH_DECL_NEW(btn_obio, sizeof(struct btn_obio_softc),
  96     btn_obio_probe, btn_obio_attach, NULL, NULL);
  97
  98 static int
  99 btn_obio_probe(device_t parent, cfdata_t cfp, void *aux)
 100 {
 101         struct obio_attach_args *oa = aux;
 102
 103         if (btn_softc)
 104                 return (0);
 105
 106         oa->oa_nio = 0;
 107         oa->oa_niomem = 0;
 108         oa->oa_nirq = 1;
 109         oa->oa_irq[0].or_irq = LANDISK_INTR_BTN;
 110
 111         return (1);
 112 }
 113
 114 static void
 115 btn_obio_attach(device_t parent, device_t self, void *aux)
 116 {
 117         struct btn_obio_softc *sc;
 118         int i;
 119
 120         aprint_naive("\n");
 121         aprint_normal(": USL-5P buttons\n");
 122
 123         sc = device_private(self);
 124         sc->sc_dev = self;
 125
 126         btn_softc = sc;
 127
 128         callout_init(&sc->sc_guard_ch, 0);
 129         callout_setfunc(&sc->sc_guard_ch, btn_guard_timeout, sc);
 130
 131         sc->sc_ih = extintr_establish(LANDISK_INTR_BTN, IPL_TTY, btn_intr, sc);
 132         if (sc->sc_ih == NULL) {
 133                 aprint_error_dev(self, "unable to establish interrupt");
 134                 panic("extintr_establish");
 135         }
 136
 137         sc->sc_smpsw.smpsw_name = device_xname(self);
 138         sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_RESET;
 139         if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
 140                 aprint_error_dev(self, "unable to register with sysmon\n");
 141                 return;
 142         }
 143         sc->sc_mask |= BTN_RESET_BIT;
 144
 145         for (i = 0; i < NBUTTON; i++) {
 146                 int idx = btnlist[i].idx;
 147                 sc->sc_bev[idx].bev_name = btnlist[i].name;
 148                 if (btn_event_register(&sc->sc_bev[idx]) != 0) {
 149                         aprint_error_dev(self,
 150                                          "unable to register '%s' button\n",
 151                                          btnlist[i].name);
 152                 } else {
 153                         sc->sc_mask |= btnlist[i].mask;
 154                 }
 155         }
 156 }
 157
 158 static int
 159 btn_intr(void *arg)
 160 {
 161         struct btn_obio_softc *sc = (void *)arg;
 162         device_t self = sc->sc_dev;
 163         int status;
 164         int i;
 165
 166         status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
 167         if (status == -1) {
 168                 return (0);
 169         }
 170
 171         status = ~status;
 172         if (status & BTN_ALL_BIT) {
 173                 if (status & BTN_RESET_BIT) {
 174                         if (sc->sc_mask & BTN_RESET_BIT) {
 175                                 extintr_disable(sc->sc_ih);
 176 #if NPWRSW_OBIO > 0
 177                                 extintr_disable_by_num(LANDISK_INTR_PWRSW);
 178 #endif
 179                                 sysmon_task_queue_sched(0,
 180                                     btn_sysmon_pressed_event, sc);
 181                                 return (1);
 182                         } else {
 183                                 aprint_normal_dev(self,
 184                                         "reset button pressed\n");
 185                         }
 186                 }
 187
 188                 for (i = 0; i < NBUTTON; i++) {
 189                         uint8_t mask = btnlist[i].mask;
 190                         int rv = 0;
 191                         if (status & mask) {
 192                                 if (sc->sc_mask & mask) {
 193                                         sysmon_task_queue_sched(1,
 194                                             btn_pressed_event,
 195                                             &sc->sc_bev[btnlist[i].idx]);
 196                                 } else {
 197                                         aprint_normal_dev(self,
 198                                                 "%s button pressed\n",
 199                                                 btnlist[i].name);
 200                                 }
 201                                 rv = 1;
 202                         }
 203                         if (rv != 0) {
 204                                 extintr_disable(sc->sc_ih);
 205                                 callout_schedule(&sc->sc_guard_ch, BTN_TIMEOUT);
 206                         }
 207                 }
 208                 return (1);
 209         }
 210         return (0);
 211 }
 212
 213 static void
 214 btn_sysmon_pressed_event(void *arg)
 215 {
 216         struct btn_obio_softc *sc = (void *)arg;
 217
 218         sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
 219 }
 220
 221 static void
 222 btn_pressed_event(void *arg)
 223 {
 224         struct btn_event *bev = (void *)arg;
 225
 226         btn_event_send(bev, BUTTON_EVENT_PRESSED);
 227 }
 228
 229 static void
 230 btn_guard_timeout(void *arg)
 231 {
 232         struct btn_obio_softc *sc = arg;
 233
 234         callout_stop(&sc->sc_guard_ch);
 235         extintr_enable(sc->sc_ih);
 236 }