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: stable/12/sys/dev/acpica/acpi_button.c 246128 2013-01-30 18:01:20Z sbz $");
   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     DEVMETHOD_END
   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_prw_data        prw;
  130     struct acpi_button_softc    *sc;
  131     ACPI_STATUS                 status;
  132     int event;
  133 
  134     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  135 
  136     sc = device_get_softc(dev);
  137     sc->button_dev = dev;
  138     sc->button_handle = acpi_get_handle(dev);
  139     event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
  140             ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
  141 
  142     /* 
  143      * Install the new handler.  We could remove any fixed handlers added
  144      * from the FADT once we have a duplicate from the AML but some systems
  145      * only return events on one or the other so we have to keep both.
  146      */
  147     if (sc->fixed) {
  148         AcpiClearEvent(event);
  149         status = AcpiInstallFixedEventHandler(event,
  150                         acpi_button_fixed_handler, sc);
  151     } else {
  152         /*
  153          * If a system does not get lid events, it may make sense to change
  154          * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake
  155          * and runtime notify in that case though.
  156          */
  157         status = AcpiInstallNotifyHandler(sc->button_handle,
  158                         ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
  159     }
  160     if (ACPI_FAILURE(status)) {
  161         device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
  162                       AcpiFormatException(status));
  163         return_VALUE (ENXIO);
  164     }
  165 
  166     /* Enable the GPE for wake/runtime. */
  167     acpi_wake_set_enable(dev, 1);
  168     if (acpi_parse_prw(sc->button_handle, &prw) == 0)
  169         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
  170 
  171     return_VALUE (0);
  172 }
  173 
  174 static int
  175 acpi_button_suspend(device_t dev)
  176 {
  177     return (0);
  178 }
  179 
  180 static int
  181 acpi_button_resume(device_t dev)
  182 {
  183     return (0);
  184 }
  185 
  186 static void
  187 acpi_button_notify_sleep(void *arg)
  188 {
  189     struct acpi_button_softc    *sc;
  190     struct acpi_softc           *acpi_sc;
  191 
  192     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  193 
  194     sc = (struct acpi_button_softc *)arg;
  195     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  196     if (acpi_sc == NULL)
  197         return_VOID;
  198 
  199     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  200 
  201     switch (sc->button_type) {
  202     case ACPI_POWER_BUTTON:
  203         ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
  204         acpi_event_power_button_sleep(acpi_sc);
  205         break;
  206     case ACPI_SLEEP_BUTTON:
  207         ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
  208         acpi_event_sleep_button_sleep(acpi_sc);
  209         break;
  210     default:
  211         break;          /* unknown button type */
  212     }
  213 }
  214 
  215 static void
  216 acpi_button_notify_wakeup(void *arg)
  217 {
  218     struct acpi_button_softc    *sc;
  219     struct acpi_softc           *acpi_sc;
  220 
  221     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  222 
  223     sc = (struct acpi_button_softc *)arg;
  224     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  225     if (acpi_sc == NULL)
  226         return_VOID;
  227 
  228     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  229 
  230     switch (sc->button_type) {
  231     case ACPI_POWER_BUTTON:
  232         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
  233         acpi_event_power_button_wake(acpi_sc);
  234         break;
  235     case ACPI_SLEEP_BUTTON:
  236         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
  237         acpi_event_sleep_button_wake(acpi_sc);
  238         break;
  239     default:
  240         break;          /* unknown button type */
  241     }
  242 }
  243 
  244 static void 
  245 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  246 {
  247     struct acpi_button_softc    *sc;
  248 
  249     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  250 
  251     sc = (struct acpi_button_softc *)context;
  252     switch (notify) {
  253     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
  254         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc);
  255         break;   
  256     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
  257         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc);
  258         break;   
  259     default:
  260         device_printf(sc->button_dev, "unknown notify %#x\n", notify);
  261         break;
  262     }
  263 }
  264 
  265 static ACPI_STATUS 
  266 acpi_button_fixed_handler(void *context)
  267 {
  268     struct acpi_button_softc    *sc = (struct acpi_button_softc *)context;
  269 
  270     ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context);
  271 
  272     if (context == NULL)
  273         return_ACPI_STATUS (AE_BAD_PARAMETER);
  274 
  275     acpi_button_notify_handler(sc->button_handle,
  276                                ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc);
  277     return_ACPI_STATUS (AE_OK);
  278 }

Cache object: 8624a0adc3336c91cdbe6958ed435c66


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