sys/dev/acpica5/acpi_button.c

   1 /*-
   2  * Copyright (c) 2000 Mitsaru IWASAKI <iwasaki@jp.freebsd.org>
   3  * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
   4  * Copyright (c) 2000 BSDi
   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 AUTHOR 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 AUTHOR 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  * $FreeBSD: src/sys/dev/acpica/acpi_button.c,v 1.33 2009/06/05 18:44:36 jkim Exp
  29  */
  30
  31 #include "opt_acpi.h"
  32 #include <sys/param.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35 #include <sys/bus.h>
  36
  37 #include "acpi.h"
  38 #include "accommon.h"
  39
  40 #include <dev/acpica5/acpivar.h>
  41
  42 /* Hooks for the ACPI CA debugging infrastructure */
  43 #define _COMPONENT      ACPI_BUTTON
  44 ACPI_MODULE_NAME("BUTTON")
  45
  46 struct acpi_button_softc {
  47     device_t    button_dev;
  48     ACPI_HANDLE button_handle;
  49     boolean_t   button_type;
  50 #define         ACPI_POWER_BUTTON       0
  51 #define         ACPI_SLEEP_BUTTON       1
  52     boolean_t   fixed;
  53 };
  54
  55 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP    0x80
  56 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP   0x02
  57
  58 static int      acpi_button_probe(device_t dev);
  59 static int      acpi_button_attach(device_t dev);
  60 static int      acpi_button_suspend(device_t dev);
  61 static int      acpi_button_resume(device_t dev);
  62 static void     acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify,
  63                                            void *context);
  64 static ACPI_STATUS
  65                 acpi_button_fixed_handler(void *context);
  66 static void     acpi_button_notify_sleep(void *arg);
  67 static void     acpi_button_notify_wakeup(void *arg);
  68
  69 static char *btn_ids[] = {
  70     "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB",
  71     NULL
  72 };
  73
  74 static device_method_t acpi_button_methods[] = {
  75     /* Device interface */
  76     DEVMETHOD(device_probe,     acpi_button_probe),
  77     DEVMETHOD(device_attach,    acpi_button_attach),
  78     DEVMETHOD(device_suspend,   acpi_button_suspend),
  79     DEVMETHOD(device_shutdown,  acpi_button_suspend),
  80     DEVMETHOD(device_resume,    acpi_button_resume),
  81
  82     {0, 0}
  83 };
  84
  85 static driver_t acpi_button_driver = {
  86     "acpi_button",
  87     acpi_button_methods,
  88     sizeof(struct acpi_button_softc),
  89 };
  90
  91 static devclass_t acpi_button_devclass;
  92 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
  93               0, 0);
  94 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1);
  95
  96 static int
  97 acpi_button_probe(device_t dev)
  98 {
  99     struct acpi_button_softc *sc;
 100     char *str;
 101
 102     if (acpi_disabled("button") ||
 103         (str = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids)) == NULL)
 104         return (ENXIO);
 105
 106     sc = device_get_softc(dev);
 107     if (strcmp(str, "PNP0C0C") == 0) {
 108         device_set_desc(dev, "Power Button");
 109         sc->button_type = ACPI_POWER_BUTTON;
 110     } else if (strcmp(str, "ACPI_FPB") == 0) {
 111         device_set_desc(dev, "Power Button (fixed)");
 112         sc->button_type = ACPI_POWER_BUTTON;
 113         sc->fixed = 1;
 114     } else if (strcmp(str, "PNP0C0E") == 0) {
 115         device_set_desc(dev, "Sleep Button");
 116         sc->button_type = ACPI_SLEEP_BUTTON;
 117     } else if (strcmp(str, "ACPI_FSB") == 0) {
 118         device_set_desc(dev, "Sleep Button (fixed)");
 119         sc->button_type = ACPI_SLEEP_BUTTON;
 120         sc->fixed = 1;
 121     }
 122
 123     return (0);
 124 }
 125
 126 static int
 127 acpi_button_attach(device_t dev)
 128 {
 129     struct acpi_button_softc    *sc;
 130     ACPI_STATUS                 status;
 131     int event;
 132
 133     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 134
 135     sc = device_get_softc(dev);
 136     sc->button_dev = dev;
 137     sc->button_handle = acpi_get_handle(dev);
 138     event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
 139             ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
 140
 141     /*
 142      * Install the new handler.  We could remove any fixed handlers added
 143      * from the FADT once we have a duplicate from the AML but some systems
 144      * only return events on one or the other so we have to keep both.
 145      */
 146     if (sc->fixed) {
 147         AcpiClearEvent(event);
 148         status = AcpiInstallFixedEventHandler(event,
 149                         acpi_button_fixed_handler, sc);
 150     } else {
 151         /*
 152          * If a system does not get lid events, it may make sense to change
 153          * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake
 154          * and runtime notify in that case though.
 155          */
 156         status = AcpiInstallNotifyHandler(sc->button_handle,
 157                         ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
 158     }
 159     if (ACPI_FAILURE(status)) {
 160         device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
 161                       AcpiFormatException(status));
 162         return_VALUE (ENXIO);
 163     }
 164
 165     /* Enable the GPE for wake/runtime. */
 166     acpi_wake_init(dev, ACPI_GPE_TYPE_WAKE_RUN);
 167     acpi_wake_set_enable(dev, 1);
 168
 169     return_VALUE (0);
 170 }
 171
 172 static int
 173 acpi_button_suspend(device_t dev)
 174 {
 175     return (0);
 176 }
 177
 178 static int
 179 acpi_button_resume(device_t dev)
 180 {
 181     return (0);
 182 }
 183
 184 static void
 185 acpi_button_notify_sleep(void *arg)
 186 {
 187     struct acpi_button_softc    *sc;
 188     struct acpi_softc           *acpi_sc;
 189
 190     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 191
 192     sc = (struct acpi_button_softc *)arg;
 193     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
 194     if (acpi_sc == NULL)
 195         return_VOID;
 196
 197     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
 198
 199     switch (sc->button_type) {
 200     case ACPI_POWER_BUTTON:
 201         ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
 202         acpi_event_power_button_sleep(acpi_sc);
 203         break;
 204     case ACPI_SLEEP_BUTTON:
 205         ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
 206         acpi_event_sleep_button_sleep(acpi_sc);
 207         break;
 208     default:
 209         break;          /* unknown button type */
 210     }
 211 }
 212
 213 static void
 214 acpi_button_notify_wakeup(void *arg)
 215 {
 216     struct acpi_button_softc    *sc;
 217     struct acpi_softc           *acpi_sc;
 218
 219     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 220
 221     sc = (struct acpi_button_softc *)arg;
 222     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
 223     if (acpi_sc == NULL)
 224         return_VOID;
 225
 226     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
 227
 228     switch (sc->button_type) {
 229     case ACPI_POWER_BUTTON:
 230         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
 231         acpi_event_power_button_wake(acpi_sc);
 232         break;
 233     case ACPI_SLEEP_BUTTON:
 234         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
 235         acpi_event_sleep_button_wake(acpi_sc);
 236         break;
 237     default:
 238         break;          /* unknown button type */
 239     }
 240 }
 241
 242 static void
 243 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 244 {
 245     struct acpi_button_softc    *sc;
 246
 247     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 248
 249     sc = (struct acpi_button_softc *)context;
 250     switch (notify) {
 251     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
 252         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc);
 253         break;
 254     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
 255         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc);
 256         break;
 257     default:
 258         device_printf(sc->button_dev, "unknown notify %#x\n", notify);
 259         break;
 260     }
 261 }
 262
 263 static ACPI_STATUS
 264 acpi_button_fixed_handler(void *context)
 265 {
 266     struct acpi_button_softc    *sc = (struct acpi_button_softc *)context;
 267
 268     ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context);
 269
 270     if (context == NULL)
 271         return_ACPI_STATUS (AE_BAD_PARAMETER);
 272
 273     acpi_button_notify_handler(sc->button_handle,
 274                                ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc);
 275     return_ACPI_STATUS (AE_OK);
 276 }