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("$FreeBSD$");
   31 
   32 #include "opt_acpi.h"
   33 #include "opt_evdev.h"
   34 #include <sys/param.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/bus.h>
   38 
   39 #include <contrib/dev/acpica/include/acpi.h>
   40 #include <contrib/dev/acpica/include/accommon.h>
   41 
   42 #include <dev/acpica/acpivar.h>
   43 
   44 #ifdef EVDEV_SUPPORT
   45 #include <dev/evdev/input.h>
   46 #include <dev/evdev/evdev.h>
   47 #endif
   48 
   49 /* Hooks for the ACPI CA debugging infrastructure */
   50 #define _COMPONENT      ACPI_BUTTON
   51 ACPI_MODULE_NAME("BUTTON")
   52 
   53 struct acpi_button_softc {
   54     device_t    button_dev;
   55     ACPI_HANDLE button_handle;
   56     boolean_t   button_type;
   57 #define         ACPI_POWER_BUTTON       0
   58 #define         ACPI_SLEEP_BUTTON       1
   59     boolean_t   fixed;
   60 #ifdef EVDEV_SUPPORT
   61     struct evdev_dev *button_evdev;
   62 #endif
   63 };
   64 
   65 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP    0x80
   66 #define         ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP   0x02
   67 
   68 static int      acpi_button_probe(device_t dev);
   69 static int      acpi_button_attach(device_t dev);
   70 static int      acpi_button_suspend(device_t dev);
   71 static int      acpi_button_resume(device_t dev);
   72 static void     acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify,
   73                                            void *context);
   74 static ACPI_STATUS
   75                 acpi_button_fixed_handler(void *context);
   76 static void     acpi_button_notify_sleep(void *arg);
   77 static void     acpi_button_notify_wakeup(void *arg);
   78 
   79 static char *btn_ids[] = {
   80     "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB",
   81     NULL
   82 };
   83 
   84 static device_method_t acpi_button_methods[] = {
   85     /* Device interface */
   86     DEVMETHOD(device_probe,     acpi_button_probe),
   87     DEVMETHOD(device_attach,    acpi_button_attach),
   88     DEVMETHOD(device_suspend,   acpi_button_suspend),
   89     DEVMETHOD(device_shutdown,  acpi_button_suspend),
   90     DEVMETHOD(device_resume,    acpi_button_resume),
   91     DEVMETHOD_END
   92 };
   93 
   94 static driver_t acpi_button_driver = {
   95     "acpi_button",
   96     acpi_button_methods,
   97     sizeof(struct acpi_button_softc),
   98 };
   99 
  100 static devclass_t acpi_button_devclass;
  101 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass,
  102               0, 0);
  103 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1);
  104 
  105 static int
  106 acpi_button_probe(device_t dev)
  107 {
  108     struct acpi_button_softc *sc;
  109     char *str; 
  110 
  111     if (acpi_disabled("button") ||
  112         (str = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids)) == NULL)
  113         return (ENXIO);
  114 
  115     sc = device_get_softc(dev);
  116     if (strcmp(str, "PNP0C0C") == 0) {
  117         device_set_desc(dev, "Power Button");
  118         sc->button_type = ACPI_POWER_BUTTON;
  119     } else if (strcmp(str, "ACPI_FPB") == 0) {
  120         device_set_desc(dev, "Power Button (fixed)");
  121         sc->button_type = ACPI_POWER_BUTTON;
  122         sc->fixed = 1;
  123     } else if (strcmp(str, "PNP0C0E") == 0) {
  124         device_set_desc(dev, "Sleep Button");
  125         sc->button_type = ACPI_SLEEP_BUTTON;
  126     } else if (strcmp(str, "ACPI_FSB") == 0) {
  127         device_set_desc(dev, "Sleep Button (fixed)");
  128         sc->button_type = ACPI_SLEEP_BUTTON;
  129         sc->fixed = 1;
  130     }
  131 
  132     return (0);
  133 }
  134 
  135 static int
  136 acpi_button_attach(device_t dev)
  137 {
  138     struct acpi_prw_data        prw;
  139     struct acpi_button_softc    *sc;
  140     ACPI_STATUS                 status;
  141     int event;
  142 
  143     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  144 
  145     sc = device_get_softc(dev);
  146     sc->button_dev = dev;
  147     sc->button_handle = acpi_get_handle(dev);
  148     event = (sc->button_type == ACPI_SLEEP_BUTTON) ?
  149             ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON;
  150 
  151 #ifdef EVDEV_SUPPORT
  152     sc->button_evdev = evdev_alloc();
  153     evdev_set_name(sc->button_evdev, device_get_desc(dev));
  154     evdev_set_phys(sc->button_evdev, device_get_nameunit(dev));
  155     evdev_set_id(sc->button_evdev, BUS_HOST, 0, 0, 1);
  156     evdev_support_event(sc->button_evdev, EV_SYN);
  157     evdev_support_event(sc->button_evdev, EV_KEY);
  158     evdev_support_key(sc->button_evdev,
  159         (sc->button_type == ACPI_SLEEP_BUTTON) ? KEY_SLEEP : KEY_POWER);
  160 
  161     if (evdev_register(sc->button_evdev))
  162         return (ENXIO);
  163 #endif
  164 
  165     /* 
  166      * Install the new handler.  We could remove any fixed handlers added
  167      * from the FADT once we have a duplicate from the AML but some systems
  168      * only return events on one or the other so we have to keep both.
  169      */
  170     if (sc->fixed) {
  171         AcpiClearEvent(event);
  172         status = AcpiInstallFixedEventHandler(event,
  173                         acpi_button_fixed_handler, sc);
  174     } else {
  175         /*
  176          * If a system does not get lid events, it may make sense to change
  177          * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake
  178          * and runtime notify in that case though.
  179          */
  180         status = AcpiInstallNotifyHandler(sc->button_handle,
  181                         ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc);
  182     }
  183     if (ACPI_FAILURE(status)) {
  184         device_printf(sc->button_dev, "couldn't install notify handler - %s\n",
  185                       AcpiFormatException(status));
  186         return_VALUE (ENXIO);
  187     }
  188 
  189     /* Enable the GPE for wake/runtime. */
  190     acpi_wake_set_enable(dev, 1);
  191     if (acpi_parse_prw(sc->button_handle, &prw) == 0)
  192         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
  193 
  194     return_VALUE (0);
  195 }
  196 
  197 static int
  198 acpi_button_suspend(device_t dev)
  199 {
  200     return (0);
  201 }
  202 
  203 static int
  204 acpi_button_resume(device_t dev)
  205 {
  206     return (0);
  207 }
  208 
  209 static void
  210 acpi_button_notify_sleep(void *arg)
  211 {
  212     struct acpi_button_softc    *sc;
  213     struct acpi_softc           *acpi_sc;
  214 
  215     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  216 
  217     sc = (struct acpi_button_softc *)arg;
  218     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  219     if (acpi_sc == NULL)
  220         return_VOID;
  221 
  222     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  223 
  224     switch (sc->button_type) {
  225     case ACPI_POWER_BUTTON:
  226         ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n");
  227         acpi_event_power_button_sleep(acpi_sc);
  228         break;
  229     case ACPI_SLEEP_BUTTON:
  230         ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n");
  231         acpi_event_sleep_button_sleep(acpi_sc);
  232         break;
  233     default:
  234         break;          /* unknown button type */
  235     }
  236 }
  237 
  238 static void
  239 acpi_button_notify_wakeup(void *arg)
  240 {
  241     struct acpi_button_softc    *sc;
  242     struct acpi_softc           *acpi_sc;
  243 
  244     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  245 
  246     sc = (struct acpi_button_softc *)arg;
  247     acpi_sc = acpi_device_get_parent_softc(sc->button_dev);
  248     if (acpi_sc == NULL)
  249         return_VOID;
  250 
  251     acpi_UserNotify("Button", sc->button_handle, sc->button_type);
  252 
  253     switch (sc->button_type) {
  254     case ACPI_POWER_BUTTON:
  255         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n");
  256         acpi_event_power_button_wake(acpi_sc);
  257         break;
  258     case ACPI_SLEEP_BUTTON:
  259         ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n");
  260         acpi_event_sleep_button_wake(acpi_sc);
  261         break;
  262     default:
  263         break;          /* unknown button type */
  264     }
  265 }
  266 
  267 static void 
  268 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  269 {
  270     struct acpi_button_softc    *sc;
  271 #ifdef EVDEV_SUPPORT
  272     uint16_t key;
  273 #endif
  274 
  275     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  276 
  277     sc = (struct acpi_button_softc *)context;
  278     switch (notify) {
  279     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP:
  280         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc);
  281         break;   
  282     case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP:
  283         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc);
  284         break;   
  285     default:
  286         device_printf(sc->button_dev, "unknown notify %#x\n", notify);
  287         break;
  288     }
  289 
  290 #ifdef EVDEV_SUPPORT
  291     key = (sc->button_type == ACPI_SLEEP_BUTTON) ? KEY_SLEEP : KEY_POWER;
  292     evdev_push_key(sc->button_evdev, key, 1);
  293     evdev_sync(sc->button_evdev);
  294     evdev_push_key(sc->button_evdev, key, 0);
  295     evdev_sync(sc->button_evdev);
  296 #endif
  297 }
  298 
  299 static ACPI_STATUS 
  300 acpi_button_fixed_handler(void *context)
  301 {
  302     struct acpi_button_softc    *sc = (struct acpi_button_softc *)context;
  303 
  304     ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context);
  305 
  306     if (context == NULL)
  307         return_ACPI_STATUS (AE_BAD_PARAMETER);
  308 
  309     acpi_button_notify_handler(sc->button_handle,
  310                                ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc);
  311     return_ACPI_STATUS (AE_OK);
  312 }

Cache object: daab4b783ee01582cad52c2a482b290e


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