The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: 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 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/9.0/sys/dev/acpica/acpi_button.c 216471 2010-12-15 23:48:45Z jkim $");
   31 
   32 #include "opt_acpi.h"
   33 #include <sys/param.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/bus.h>
   37 
   38 #include <contrib/dev/acpica/include/acpi.h>
   39 #include <contrib/dev/acpica/include/accommon.h>
   40 
   41 #include <dev/acpica/acpivar.h>
   42 
   43 /* Hooks for the ACPI CA debugging infrastructure */
   44 #define _COMPONENT      ACPI_BUTTON
   45 ACPI_MODULE_NAME("BUTTON")
   46 
   47 struct acpi_button_softc {
   48     device_t    button_dev;
   49     ACPI_HANDLE button_handle;
   50     boolean_t   button_type;
   51 #define         ACPI_POWER_BUTTON       0
   52 #define         ACPI_SLEEP_BUTTON       1
   53     boolean_t   fixed;
   54 };
   55 
   56 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP    0x80
   57 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP   0x02
   58 
   59 static int      acpi_button_probe(device_t dev);
   60 static int      acpi_button_attach(device_t dev);
   61 static int      acpi_button_suspend(device_t dev);
   62 static int      acpi_button_resume(device_t dev);
   63 static void     acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify,
   64                                            void *context);
   65 static ACPI_STATUS
   66                 acpi_button_fixed_handler(void *context);
   67 static void     acpi_button_notify_sleep(void *arg);
   68 static void     acpi_button_notify_wakeup(void *arg);
   69 
   70 static char *btn_ids[] = {
   71     "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB",
   72     NULL
   73 };
   74 
   75 static device_method_t acpi_button_methods[] = {
   76     /* Device interface */
   77     DEVMETHOD(device_probe,     acpi_button_probe),
   78     DEVMETHOD(device_attach,    acpi_button_attach),
   79     DEVMETHOD(device_suspend,   acpi_button_suspend),
   80     DEVMETHOD(device_shutdown,  acpi_button_suspend),
   81     DEVMETHOD(device_resume,    acpi_button_resume),
   82 
   83     {0, 0}
   84 };
   85 
   86 static driver_t acpi_button_driver = {
   87     "acpi_button",
   88     acpi_button_methods,
   89     sizeof(struct acpi_button_softc),
   90 };
   91 
   92 static devclass_t acpi_button_devclass;
   93 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
   94               0, 0);
   95 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1);
   96 
   97 static int
   98 acpi_button_probe(device_t dev)
   99 {
  100     struct acpi_button_softc *sc;
  101     char *str; 
  102 
  103     if (acpi_disabled("button") ||
  104         (str = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids)) == NULL)
  105         return (ENXIO);
  106 
  107     sc = device_get_softc(dev);
  108     if (strcmp(str, "PNP0C0C") == 0) {
  109         device_set_desc(dev, "Power Button");
  110         sc->button_type = ACPI_POWER_BUTTON;
  111     } else if (strcmp(str, "ACPI_FPB") == 0) {
  112         device_set_desc(dev, "Power Button (fixed)");
  113         sc->button_type = ACPI_POWER_BUTTON;
  114         sc->fixed = 1;
  115     } else if (strcmp(str, "PNP0C0E") == 0) {
  116         device_set_desc(dev, "Sleep Button");
  117         sc->button_type = ACPI_SLEEP_BUTTON;
  118     } else if (strcmp(str, "ACPI_FSB") == 0) {
  119         device_set_desc(dev, "Sleep Button (fixed)");
  120         sc->button_type = ACPI_SLEEP_BUTTON;
  121         sc->fixed = 1;
  122     }
  123 
  124     return (0);
  125 }
  126 
  127 static int
  128 acpi_button_attach(device_t dev)
  129 {
  130     struct acpi_prw_data        prw;
  131     struct acpi_button_softc    *sc;
  132     ACPI_STATUS                 status;
  133     int event;
  134 
  135     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  136 
  137     sc = device_get_softc(dev);
  138     sc->button_dev = dev;
  139     sc->button_handle = acpi_get_handle(dev);
  140     event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
  141             ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
  142 
  143     /* 
  144      * Install the new handler.  We could remove any fixed handlers added
  145      * from the FADT once we have a duplicate from the AML but some systems
  146      * only return events on one or the other so we have to keep both.
  147      */
  148     if (sc->fixed) {
  149         AcpiClearEvent(event);
  150         status = AcpiInstallFixedEventHandler(event,
  151                         acpi_button_fixed_handler, sc);
  152     } else {
  153         /*
  154          * If a system does not get lid events, it may make sense to change
  155          * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake
  156          * and runtime notify in that case though.
  157          */
  158         status = AcpiInstallNotifyHandler(sc->button_handle,
  159                         ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
  160     }
  161     if (ACPI_FAILURE(status)) {
  162         device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
  163                       AcpiFormatException(status));
  164         return_VALUE (ENXIO);
  165     }
  166 
  167     /* Enable the GPE for wake/runtime. */
  168     acpi_wake_set_enable(dev, 1);
  169     if (acpi_parse_prw(sc->button_handle, &prw) == 0)
  170         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
  171 
  172     return_VALUE (0);
  173 }
  174 
  175 static int
  176 acpi_button_suspend(device_t dev)
  177 {
  178     return (0);
  179 }
  180 
  181 static int
  182 acpi_button_resume(device_t dev)
  183 {
  184     return (0);
  185 }
  186 
  187 static void
  188 acpi_button_notify_sleep(void *arg)
  189 {
  190     struct acpi_button_softc    *sc;
  191     struct acpi_softc           *acpi_sc;
  192 
  193     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  194 
  195     sc = (struct acpi_button_softc *)arg;
  196     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  197     if (acpi_sc == NULL)
  198         return_VOID;
  199 
  200     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  201 
  202     switch (sc->button_type) {
  203     case ACPI_POWER_BUTTON:
  204         ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
  205         acpi_event_power_button_sleep(acpi_sc);
  206         break;
  207     case ACPI_SLEEP_BUTTON:
  208         ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
  209         acpi_event_sleep_button_sleep(acpi_sc);
  210         break;
  211     default:
  212         break;          /* unknown button type */
  213     }
  214 }
  215 
  216 static void
  217 acpi_button_notify_wakeup(void *arg)
  218 {
  219     struct acpi_button_softc    *sc;
  220     struct acpi_softc           *acpi_sc;
  221 
  222     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  223 
  224     sc = (struct acpi_button_softc *)arg;
  225     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  226     if (acpi_sc == NULL)
  227         return_VOID;
  228 
  229     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  230 
  231     switch (sc->button_type) {
  232     case ACPI_POWER_BUTTON:
  233         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
  234         acpi_event_power_button_wake(acpi_sc);
  235         break;
  236     case ACPI_SLEEP_BUTTON:
  237         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
  238         acpi_event_sleep_button_wake(acpi_sc);
  239         break;
  240     default:
  241         break;          /* unknown button type */
  242     }
  243 }
  244 
  245 static void 
  246 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  247 {
  248     struct acpi_button_softc    *sc;
  249 
  250     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  251 
  252     sc = (struct acpi_button_softc *)context;
  253     switch (notify) {
  254     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
  255         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc);
  256         break;   
  257     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
  258         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc);
  259         break;   
  260     default:
  261         device_printf(sc->button_dev, "unknown notify %#x\n", notify);
  262         break;
  263     }
  264 }
  265 
  266 static ACPI_STATUS 
  267 acpi_button_fixed_handler(void *context)
  268 {
  269     struct acpi_button_softc    *sc = (struct acpi_button_softc *)context;
  270 
  271     ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context);
  272 
  273     if (context == NULL)
  274         return_ACPI_STATUS (AE_BAD_PARAMETER);
  275 
  276     acpi_button_notify_handler(sc->button_handle,
  277                                ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc);
  278     return_ACPI_STATUS (AE_OK);
  279 }

Cache object: fcb4a79fd3e03a5b28c6b5c4cbbc337d


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