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

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    1 /*-
    2  * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
    3  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
    4  * Copyright (c) 2000 Michael Smith <msmith@freebd.org>
    5  * Copyright (c) 2000 BSDi
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include "opt_acpi.h"
   34 #include "opt_evdev.h"
   35 #include <sys/param.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 #include <sys/bus.h>
   39 #include <sys/proc.h>
   40 
   41 #include <contrib/dev/acpica/include/acpi.h>
   42 #include <contrib/dev/acpica/include/accommon.h>
   43 
   44 #include <dev/acpica/acpivar.h>
   45 
   46 #ifdef EVDEV_SUPPORT
   47 #include <dev/evdev/input.h>
   48 #include <dev/evdev/evdev.h>
   49 #endif
   50 
   51 /* Hooks for the ACPI CA debugging infrastructure */
   52 #define _COMPONENT      ACPI_BUTTON
   53 ACPI_MODULE_NAME("LID")
   54 
   55 struct acpi_lid_softc {
   56     device_t    lid_dev;
   57     ACPI_HANDLE lid_handle;
   58     int         lid_status;     /* open or closed */
   59 #ifdef EVDEV_SUPPORT
   60     struct evdev_dev *lid_evdev;
   61 #endif
   62 };
   63 
   64 ACPI_HANDLE acpi_lid_handle;
   65 
   66 ACPI_SERIAL_DECL(lid, "ACPI lid");
   67 
   68 static int      acpi_lid_probe(device_t dev);
   69 static int      acpi_lid_attach(device_t dev);
   70 static int      acpi_lid_suspend(device_t dev);
   71 static int      acpi_lid_resume(device_t dev);
   72 static void     acpi_lid_notify_status_changed(void *arg);
   73 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
   74                                         void *context);
   75 
   76 static device_method_t acpi_lid_methods[] = {
   77     /* Device interface */
   78     DEVMETHOD(device_probe,     acpi_lid_probe),
   79     DEVMETHOD(device_attach,    acpi_lid_attach),
   80     DEVMETHOD(device_suspend,   acpi_lid_suspend),
   81     DEVMETHOD(device_resume,    acpi_lid_resume),
   82 
   83     DEVMETHOD_END
   84 };
   85 
   86 static driver_t acpi_lid_driver = {
   87     "acpi_lid",
   88     acpi_lid_methods,
   89     sizeof(struct acpi_lid_softc),
   90 };
   91 
   92 static devclass_t acpi_lid_devclass;
   93 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
   94 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
   95 
   96 static void
   97 acpi_lid_status_update(struct acpi_lid_softc *sc)
   98 {
   99         ACPI_STATUS status;
  100         int lid_status;
  101 
  102         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  103 
  104         /*
  105          * Evaluate _LID and check the return value, update lid status.
  106          *      Zero:           The lid is closed
  107          *      Non-zero:       The lid is open
  108          */
  109         status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status);
  110         if (ACPI_FAILURE(status))
  111                 lid_status = 1;         /* assume lid is opened */
  112 
  113         /* range check value */
  114         sc->lid_status = lid_status ? 1 : 0;
  115 
  116         /* Send notification via devd */
  117         acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
  118 
  119 #ifdef EVDEV_SUPPORT
  120         /* Notify evdev about lid status */
  121         evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1);
  122         evdev_sync(sc->lid_evdev);
  123 #endif
  124 }
  125 
  126 static int
  127 acpi_lid_probe(device_t dev)
  128 {
  129     static char *lid_ids[] = { "PNP0C0D", NULL };
  130 
  131     if (acpi_disabled("lid") ||
  132         ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL)
  133         return (ENXIO);
  134 
  135     device_set_desc(dev, "Control Method Lid Switch");
  136     return (0);
  137 }
  138 
  139 static int
  140 acpi_lid_attach(device_t dev)
  141 {
  142     struct acpi_prw_data        prw;
  143     struct acpi_lid_softc       *sc;
  144 
  145     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  146 
  147     sc = device_get_softc(dev);
  148     sc->lid_dev = dev;
  149     acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev);
  150 
  151 #ifdef EVDEV_SUPPORT
  152     /* Register evdev device before initial status update */
  153     sc->lid_evdev = evdev_alloc();
  154     evdev_set_name(sc->lid_evdev, device_get_desc(dev));
  155     evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev));
  156     evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1);
  157     evdev_support_event(sc->lid_evdev, EV_SYN);
  158     evdev_support_event(sc->lid_evdev, EV_SW);
  159     evdev_support_sw(sc->lid_evdev, SW_LID);
  160 
  161     if (evdev_register(sc->lid_evdev))
  162         return (ENXIO);
  163 #endif
  164 
  165     /*
  166      * If a system does not get lid events, it may make sense to change
  167      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
  168      * runtime notify in that case though.
  169      */
  170     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
  171                              acpi_lid_notify_handler, sc);
  172 
  173     /* Enable the GPE for wake/runtime. */
  174     acpi_wake_set_enable(dev, 1);
  175     if (acpi_parse_prw(sc->lid_handle, &prw) == 0)
  176         AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
  177 
  178     /* Get the initial lid status */
  179     acpi_lid_status_update(sc);
  180 
  181     /*
  182      * Export the lid status
  183      */
  184     SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
  185         SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
  186         "state", CTLFLAG_RD, &sc->lid_status, 0,
  187         "Device state (0 = closed, 1 = open)");
  188 
  189     return (0);
  190 }
  191 
  192 static int
  193 acpi_lid_suspend(device_t dev)
  194 {
  195     return (0);
  196 }
  197 
  198 static int
  199 acpi_lid_resume(device_t dev)
  200 {
  201     struct acpi_lid_softc       *sc;
  202 
  203     sc = device_get_softc(dev);
  204 
  205     /* Update lid status, if any */
  206     acpi_lid_status_update(sc);
  207 
  208     return (0);
  209 }
  210 
  211 static void
  212 acpi_lid_notify_status_changed(void *arg)
  213 {
  214     struct acpi_lid_softc       *sc;
  215     struct acpi_softc           *acpi_sc;
  216 
  217     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  218 
  219     sc = (struct acpi_lid_softc *)arg;
  220     ACPI_SERIAL_BEGIN(lid);
  221 
  222     /* Update lid status, if any */
  223     acpi_lid_status_update(sc);
  224 
  225     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
  226     if (acpi_sc == NULL)
  227         goto out;
  228 
  229     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
  230                 sc->lid_status ? "opened" : "closed");
  231 
  232     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
  233 
  234     if (sc->lid_status == 0)
  235         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
  236     else
  237         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
  238 
  239 out:
  240     ACPI_SERIAL_END(lid);
  241     return_VOID;
  242 }
  243 
  244 /* XXX maybe not here */
  245 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
  246 
  247 static void 
  248 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
  249 {
  250     struct acpi_lid_softc       *sc;
  251 
  252     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
  253 
  254     sc = (struct acpi_lid_softc *)context;
  255     switch (notify) {
  256     case ACPI_NOTIFY_STATUS_CHANGED:
  257         AcpiOsExecute(OSL_NOTIFY_HANDLER,
  258                       acpi_lid_notify_status_changed, sc);
  259         break;
  260     default:
  261         device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
  262         break;
  263     }
  264 
  265     return_VOID;
  266 }

Cache object: e831d86a14005902bab42f3e175601e2


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