sys/dev/acpica5/acpi_lid.c

   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  * $FreeBSD: src/sys/dev/acpica/acpi_lid.c,v 1.23 2004/06/13 22:52:30 njl Exp $
  30  * $DragonFly: src/sys/dev/acpica5/acpi_lid.c,v 1.5 2007/10/23 03:04:48 y0netan1 Exp $
  31  */
  32
  33 #include "opt_acpi.h"
  34 #include <sys/param.h>
  35 #include <sys/kernel.h>
  36 #include <sys/module.h>
  37 #include <sys/bus.h>
  38 #include <sys/proc.h>
  39
  40 #include "acpi.h"
  41 #include <dev/acpica5/acpivar.h>
  42
  43 /* Hooks for the ACPI CA debugging infrastructure */
  44 #define _COMPONENT      ACPI_BUTTON
  45 ACPI_MODULE_NAME("LID")
  46
  47 struct acpi_lid_softc {
  48     device_t    lid_dev;
  49     ACPI_HANDLE lid_handle;
  50     int         lid_status;     /* open or closed */
  51 };
  52
  53 static int      acpi_lid_probe(device_t dev);
  54 static int      acpi_lid_attach(device_t dev);
  55 static int      acpi_lid_suspend(device_t dev);
  56 static int      acpi_lid_resume(device_t dev);
  57 static void     acpi_lid_notify_status_changed(void *arg);
  58 static void     acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify,
  59                                         void *context);
  60
  61 static device_method_t acpi_lid_methods[] = {
  62     /* Device interface */
  63     DEVMETHOD(device_probe,     acpi_lid_probe),
  64     DEVMETHOD(device_attach,    acpi_lid_attach),
  65     DEVMETHOD(device_suspend,   acpi_lid_suspend),
  66     DEVMETHOD(device_resume,    acpi_lid_resume),
  67
  68     {0, 0}
  69 };
  70
  71 static driver_t acpi_lid_driver = {
  72     "acpi_lid",
  73     acpi_lid_methods,
  74     sizeof(struct acpi_lid_softc),
  75 };
  76
  77 static devclass_t acpi_lid_devclass;
  78 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0);
  79 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1);
  80
  81 static int
  82 acpi_lid_probe(device_t dev)
  83 {
  84     if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("lid") &&
  85         acpi_MatchHid(acpi_get_handle(dev), "PNP0C0D")) {
  86
  87         device_set_desc(dev, "Control Method Lid Switch");
  88         return (0);
  89     }
  90     return (ENXIO);
  91 }
  92
  93 static int
  94 acpi_lid_attach(device_t dev)
  95 {
  96     struct acpi_lid_softc       *sc;
  97
  98     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  99
 100     sc = device_get_softc(dev);
 101     sc->lid_dev = dev;
 102     sc->lid_handle = acpi_get_handle(dev);
 103
 104     /*
 105      * If a system does not get lid events, it may make sense to change
 106      * the type to ACPI_ALL_NOTIFY.  Some systems generate both a wake and
 107      * runtime notify in that case though.
 108      */
 109     AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY,
 110                              acpi_lid_notify_handler, sc);
 111
 112     /* Enable the GPE for wake/runtime. */
 113     acpi_wake_init(dev, ACPI_GPE_TYPE_WAKE_RUN);
 114     acpi_wake_set_enable(dev, 1);
 115
 116     return_VALUE (0);
 117 }
 118
 119 static int
 120 acpi_lid_suspend(device_t dev)
 121 {
 122     struct acpi_softc           *acpi_sc;
 123
 124     acpi_sc = acpi_device_get_parent_softc(dev);
 125     acpi_wake_sleep_prep(dev, acpi_sc->acpi_sstate);
 126     return (0);
 127 }
 128
 129 static int
 130 acpi_lid_resume(device_t dev)
 131 {
 132     acpi_wake_run_prep(dev);
 133     return (0);
 134 }
 135
 136 static void
 137 acpi_lid_notify_status_changed(void *arg)
 138 {
 139     struct acpi_lid_softc       *sc;
 140     struct acpi_softc           *acpi_sc;
 141     ACPI_STATUS                 status;
 142
 143     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 144
 145     sc = (struct acpi_lid_softc *)arg;
 146
 147     /*
 148      * Evaluate _LID and check the return value, update lid status.
 149      *  Zero:           The lid is closed
 150      *  Non-zero:       The lid is open
 151      */
 152     status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status);
 153     if (ACPI_FAILURE(status))
 154         return_VOID;
 155
 156     acpi_sc = acpi_device_get_parent_softc(sc->lid_dev);
 157     if (acpi_sc == NULL)
 158         return_VOID;
 159
 160     ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n",
 161                 sc->lid_status ? "opened" : "closed");
 162
 163     acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status);
 164
 165     if (sc->lid_status == 0)
 166         EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx);
 167     else
 168         EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx);
 169
 170     return_VOID;
 171 }
 172
 173 /* XXX maybe not here */
 174 #define ACPI_NOTIFY_STATUS_CHANGED      0x80
 175
 176 static void
 177 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 178 {
 179     struct acpi_lid_softc       *sc;
 180
 181     ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 182
 183     sc = (struct acpi_lid_softc *)context;
 184     switch (notify) {
 185     case ACPI_NOTIFY_STATUS_CHANGED:
 186         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_lid_notify_status_changed, sc);
 187         break;
 188     default:
 189         device_printf(sc->lid_dev, "unknown notify %#x\n", notify);
 190         break;
 191     }
 192
 193     return_VOID;
 194 }