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 * $FreeBSD$ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/proc.h> 39 40 #include "acpi.h" 41 42 #include <dev/acpica/acpivar.h> 43 44 /* 45 * Hooks for the ACPI CA debugging infrastructure 46 */ 47 #define _COMPONENT ACPI_BUTTON 48 MODULE_NAME("LID") 49 50 struct acpi_lid_softc { 51 device_t lid_dev; 52 ACPI_HANDLE lid_handle; 53 int lid_status; /* open or closed */ 54 }; 55 56 static int acpi_lid_probe(device_t dev); 57 static int acpi_lid_attach(device_t dev); 58 static void acpi_lid_notify_status_changed(void *arg); 59 static void acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify, 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 66 {0, 0} 67 }; 68 69 static driver_t acpi_lid_driver = { 70 "acpi_lid", 71 acpi_lid_methods, 72 sizeof(struct acpi_lid_softc), 73 }; 74 75 devclass_t acpi_lid_devclass; 76 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 77 78 static int 79 acpi_lid_probe(device_t dev) 80 { 81 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 82 !acpi_disabled("lid") && 83 acpi_MatchHid(dev, "PNP0C0D")) { 84 device_set_desc(dev, "Control Method Lid Switch"); 85 return(0); 86 } 87 return(ENXIO); 88 } 89 90 static int 91 acpi_lid_attach(device_t dev) 92 { 93 struct acpi_lid_softc *sc; 94 95 FUNCTION_TRACE(__func__); 96 97 sc = device_get_softc(dev); 98 sc->lid_dev = dev; 99 sc->lid_handle = acpi_get_handle(dev); 100 101 /* 102 * Install notification handler 103 */ 104 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc); 105 return_VALUE(0); 106 } 107 108 static void 109 acpi_lid_notify_status_changed(void *arg) 110 { 111 struct acpi_lid_softc *sc; 112 struct acpi_softc *acpi_sc; 113 114 FUNCTION_TRACE(__func__); 115 116 sc = (struct acpi_lid_softc *)arg; 117 118 /* 119 * Evaluate _LID and check the return value, update lid status. 120 * Zero: The lid is closed 121 * Non-zero: The lid is open 122 */ 123 if (acpi_EvaluateInteger(sc->lid_handle, "_LID", &sc->lid_status) != AE_OK) 124 return_VOID; 125 126 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 127 if (acpi_sc == NULL) { 128 return_VOID; 129 } 130 131 ACPI_VPRINT(sc->lid_dev, acpi_sc, 132 "Lid %s\n", sc->lid_status ? "opened" : "closed"); 133 134 if (sc->lid_status == 0) { 135 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 136 } else { 137 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 138 } 139 140 return_VOID; 141 } 142 143 /* XXX maybe not here */ 144 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 145 146 static void 147 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 148 { 149 struct acpi_lid_softc *sc = (struct acpi_lid_softc *)context; 150 151 FUNCTION_TRACE_U32(__func__, notify); 152 153 switch (notify) { 154 case ACPI_NOTIFY_STATUS_CHANGED: 155 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc); 156 break; 157 default: 158 break; /* unknown notification value */ 159 } 160 return_VOID; 161 } 162 163