The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_button.c

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    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: releng/5.3/sys/dev/acpica/acpi_button.c 131341 2004-06-30 16:08:03Z njl $
   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 <dev/acpica/acpivar.h>
   39 
   40 /* Hooks for the ACPI CA debugging infrastructure */
   41 #define _COMPONENT      ACPI_BUTTON
   42 ACPI_MODULE_NAME("BUTTON")
   43 
   44 struct acpi_button_softc {
   45     device_t    button_dev;
   46     ACPI_HANDLE button_handle;
   47     boolean_t   button_type;
   48 #define         ACPI_POWER_BUTTON       0
   49 #define         ACPI_SLEEP_BUTTON       1
   50     boolean_t   fixed;
   51 };
   52 
   53 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP    0x80
   54 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP   0x02
   55 
   56 static int      acpi_button_probe(device_t dev);
   57 static int      acpi_button_attach(device_t dev);
   58 static int      acpi_button_suspend(device_t dev);
   59 static int      acpi_button_resume(device_t dev);
   60 static void     acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify,
   61                                            void *context);
   62 static ACPI_STATUS
   63                 acpi_button_fixed_handler(void *context);
   64 static void     acpi_button_notify_sleep(void *arg);
   65 static void     acpi_button_notify_wakeup(void *arg);
   66 
   67 static char *btn_ids[] = {
   68     "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB",
   69     NULL
   70 };
   71 
   72 static device_method_t acpi_button_methods[] = {
   73     /* Device interface */
   74     DEVMETHOD(device_probe,     acpi_button_probe),
   75     DEVMETHOD(device_attach,    acpi_button_attach),
   76     DEVMETHOD(device_suspend,   acpi_button_suspend),
   77     DEVMETHOD(device_shutdown,  acpi_button_suspend),
   78     DEVMETHOD(device_resume,    acpi_button_resume),
   79 
   80     {0, 0}
   81 };
   82 
   83 static driver_t acpi_button_driver = {
   84     "acpi_button",
   85     acpi_button_methods,
   86     sizeof(struct acpi_button_softc),
   87 };
   88 
   89 static devclass_t acpi_button_devclass;
   90 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
   91               0, 0);
   92 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1);
   93 
   94 static int
   95 acpi_button_probe(device_t dev)
   96 {
   97     struct acpi_button_softc *sc;
   98     char *str; 
   99 
  100     if (acpi_disabled("button") ||
  101         (str = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids)) == NULL)
  102         return (ENXIO);
  103 
  104     sc = device_get_softc(dev);
  105     if (strcmp(str, "PNP0C0C") == 0) {
  106         device_set_desc(dev, "Power Button");
  107         sc->button_type = ACPI_POWER_BUTTON;
  108     } else if (strcmp(str, "ACPI_FPB") == 0) {
  109         device_set_desc(dev, "Power Button (fixed)");
  110         sc->button_type = ACPI_POWER_BUTTON;
  111         sc->fixed = 1;
  112     } else if (strcmp(str, "PNP0C0E") == 0) {
  113         device_set_desc(dev, "Sleep Button");
  114         sc->button_type = ACPI_SLEEP_BUTTON;
  115     } else if (strcmp(str, "ACPI_FSB") == 0) {
  116         device_set_desc(dev, "Sleep Button (fixed)");
  117         sc->button_type = ACPI_SLEEP_BUTTON;
  118         sc->fixed = 1;
  119     }
  120 
  121     return (0);
  122 }
  123 
  124 static int
  125 acpi_button_attach(device_t dev)
  126 {
  127     struct acpi_button_softc    *sc;
  128     ACPI_STATUS                 status;
  129     int event;
  130 
  131     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  132 
  133     sc = device_get_softc(dev);
  134     sc->button_dev = dev;
  135     sc->button_handle = acpi_get_handle(dev);
  136     event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
  137             ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
  138 
  139     /* 
  140      * Install the new handler.  We could remove any fixed handlers added
  141      * from the FADT once we have a duplicate from the AML but some systems
  142      * only return events on one or the other so we have to keep both.
  143      */
  144     if (sc->fixed) {
  145         AcpiClearEvent(event);
  146         status = AcpiInstallFixedEventHandler(event,
  147                         acpi_button_fixed_handler, sc);
  148     } else {
  149         /*
  150          * If a system does not get lid events, it may make sense to change
  151          * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake
  152          * and runtime notify in that case though.
  153          */
  154         status = AcpiInstallNotifyHandler(sc->button_handle,
  155                         ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
  156     }
  157     if (ACPI_FAILURE(status)) {
  158         device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
  159                       AcpiFormatException(status));
  160         return_VALUE (ENXIO);
  161     }
  162 
  163     /* Enable the GPE for wake/runtime. */
  164     acpi_wake_init(dev, ACPI_GPE_TYPE_WAKE_RUN);
  165     acpi_wake_set_enable(dev, 1);
  166     
  167     return_VALUE (0);
  168 }
  169 
  170 static int
  171 acpi_button_suspend(device_t dev)
  172 {
  173     return (0);
  174 }
  175 
  176 static int
  177 acpi_button_resume(device_t dev)
  178 {
  179     return (0);
  180 }
  181 
  182 static void
  183 acpi_button_notify_sleep(void *arg)
  184 {
  185     struct acpi_button_softc    *sc;
  186     struct acpi_softc           *acpi_sc;
  187 
  188     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  189 
  190     sc = (struct acpi_button_softc *)arg;
  191     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  192     if (acpi_sc == NULL)
  193         return_VOID;
  194 
  195     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  196 
  197     switch (sc->button_type) {
  198     case ACPI_POWER_BUTTON:
  199         ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
  200         acpi_event_power_button_sleep(acpi_sc);
  201         break;
  202     case ACPI_SLEEP_BUTTON:
  203         ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
  204         acpi_event_sleep_button_sleep(acpi_sc);
  205         break;
  206     default:
  207         break;          /* unknown button type */
  208     }
  209 }
  210 
  211 static void
  212 acpi_button_notify_wakeup(void *arg)
  213 {
  214     struct acpi_button_softc    *sc;
  215     struct acpi_softc           *acpi_sc;
  216 
  217     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  218 
  219     sc = (struct acpi_button_softc *)arg;
  220     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  221     if (acpi_sc == NULL)
  222         return_VOID;
  223 
  224     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  225 
  226     switch (sc->button_type) {
  227     case ACPI_POWER_BUTTON:
  228         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
  229         acpi_event_power_button_wake(acpi_sc);
  230         break;
  231     case ACPI_SLEEP_BUTTON:
  232         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
  233         acpi_event_sleep_button_wake(acpi_sc);
  234         break;
  235     default:
  236         break;          /* unknown button type */
  237     }
  238 }
  239 
  240 static void 
  241 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  242 {
  243     struct acpi_button_softc    *sc;
  244 
  245     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  246 
  247     sc = (struct acpi_button_softc *)context;
  248     switch (notify) {
  249     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
  250         AcpiOsQueueForExecution(OSD_PRIORITY_LO,
  251                                 acpi_button_notify_sleep, sc);
  252         break;   
  253     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
  254         AcpiOsQueueForExecution(OSD_PRIORITY_LO,
  255                                 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 }

Cache object: 72fa912109c86a44023ca7fc203d8cc6


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