sys/arch/evbarm/hdl_g/btn_obio.c

   1 /*      $NetBSD$        */
   2
   3 /*-
   4  * Copyright (c) 2005, 2006 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 <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD$");
  31
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/device.h>
  36 #include <sys/malloc.h>
  37 #include <sys/kernel.h>
  38 #include <sys/conf.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/callout.h>
  41
  42 #include <arm/xscale/i80321var.h>
  43
  44 #include <machine/bus.h>
  45 #include <machine/intr.h>
  46
  47 #include <dev/sysmon/sysmonvar.h>
  48 #include <dev/sysmon/sysmon_taskq.h>
  49
  50 #include <evbarm/hdl_g/hdlgreg.h>
  51 #include <evbarm/hdl_g/obiovar.h>
  52
  53 struct btn_obio_softc {
  54         struct device           sc_dev;
  55         bus_space_tag_t         sc_iot;
  56         bus_space_handle_t      sc_ioh;
  57         void                    *sc_ih;
  58
  59         struct sysmon_pswitch   sc_smpsw[2];
  60
  61         int                     sc_mask;
  62 };
  63
  64 static int btn_obio_match(struct device *, struct cfdata *, void *);
  65 static void btn_obio_attach(struct device *, struct device *, void *);
  66
  67 static int btn_intr(void *aux);
  68 static void btn_sysmon_pressed_event(void *arg);
  69
  70 CFATTACH_DECL(btn_obio, sizeof(struct btn_obio_softc),
  71     btn_obio_match, btn_obio_attach, NULL, NULL);
  72
  73 static int
  74 btn_obio_match(struct device *parent, struct cfdata *cfp, void *aux)
  75 {
  76
  77         /* We take it on faith that the device is there. */
  78         return 1;
  79 }
  80
  81 static void
  82 btn_obio_attach(struct device *parent, struct device *self, void *aux)
  83 {
  84         struct obio_attach_args *oba = aux;
  85         struct btn_obio_softc *sc = (void *)self;
  86         int error;
  87
  88         sc->sc_iot = oba->oba_st;
  89         error = bus_space_map(sc->sc_iot, oba->oba_addr, 1, 0, &sc->sc_ioh);
  90         if (error) {
  91                 aprint_error(": failed to map registers: %d\n", error);
  92                 return;
  93         }
  94
  95         sysmon_power_settype("landisk");
  96         sysmon_task_queue_init();
  97
  98         /* power switch */
  99         sc->sc_smpsw[0].smpsw_name = device_xname(&sc->sc_dev);
 100         sc->sc_smpsw[0].smpsw_type = PSWITCH_TYPE_POWER;
 101         if (sysmon_pswitch_register(&sc->sc_smpsw[0]) != 0) {
 102                 aprint_error(": unable to register power button with sysmon\n");
 103                 return;
 104         }
 105         sc->sc_mask |= BTNSTAT_POWER;
 106         hdlg_enable_pldintr(INTEN_PWRSW);
 107
 108         /* reset button */
 109         sc->sc_smpsw[1].smpsw_name = device_xname(&sc->sc_dev);
 110         sc->sc_smpsw[1].smpsw_type = PSWITCH_TYPE_RESET;
 111         if (sysmon_pswitch_register(&sc->sc_smpsw[1]) != 0) {
 112                 aprint_error(": unable to register reset button with sysmon\n");
 113                 return;
 114         }
 115         sc->sc_mask |= BTNSTAT_RESET;
 116
 117         sc->sc_ih = i80321_intr_establish(oba->oba_irq, IPL_TTY, btn_intr, sc);
 118         if (sc->sc_ih == NULL) {
 119                 aprint_error(": couldn't establish intr handler");
 120                 return;
 121         }
 122         hdlg_enable_pldintr(INTEN_BUTTON);
 123
 124         aprint_normal("\n");
 125 }
 126
 127 static int
 128 btn_intr(void *arg)
 129 {
 130         struct btn_obio_softc *sc = (void *)arg;
 131         int status;
 132         int rv;
 133
 134         status = (int8_t)bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0);
 135         if (status == -1) {
 136                 return 0;
 137         }
 138
 139         rv = 0;
 140         status = ~status;
 141         if (status & BTNSTAT_POWER) {
 142                 if (sc->sc_mask & BTNSTAT_POWER) {
 143                         hdlg_disable_pldintr(INTEN_PWRSW|INTEN_BUTTON);
 144                         i80321_intr_disestablish(sc->sc_ih);
 145                         sc->sc_ih = NULL;
 146                         sysmon_task_queue_sched(0, btn_sysmon_pressed_event,
 147                             &sc->sc_smpsw[0]);
 148                 } else {
 149                         aprint_error("%s: power button pressed\n",
 150                             device_xname(&sc->sc_dev));
 151                 }
 152                 rv = 1;
 153         } else if (status & BTNSTAT_RESET) {
 154                 if (sc->sc_mask & BTNSTAT_RESET) {
 155                         hdlg_disable_pldintr(INTEN_PWRSW|INTEN_BUTTON);
 156                         i80321_intr_disestablish(sc->sc_ih);
 157                         sc->sc_ih = NULL;
 158                         sysmon_task_queue_sched(0, btn_sysmon_pressed_event,
 159                             &sc->sc_smpsw[1]);
 160                 } else {
 161                         aprint_error("%s: reset button pressed\n",
 162                             device_xname(&sc->sc_dev));
 163                 }
 164                 rv = 1;
 165         }
 166
 167         return rv;
 168 }
 169
 170 static void
 171 btn_sysmon_pressed_event(void *arg)
 172 {
 173         struct sysmon_pswitch *smpsw = (void *)arg;
 174
 175         sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED);
 176 }