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/proc.h> 37 38 #include "acpi.h" 39 40 #include <dev/acpica/acpivar.h> 41 42 /* 43 * Hooks for the ACPI CA debugging infrastructure 44 */ 45 #define _COMPONENT ACPI_BUTTON 46 ACPI_MODULE_NAME("LID") 47 48 struct acpi_lid_softc { 49 device_t lid_dev; 50 ACPI_HANDLE lid_handle; 51 int lid_status; /* open or closed */ 52 }; 53 54 static int acpi_lid_probe(device_t dev); 55 static int acpi_lid_attach(device_t dev); 56 static int acpi_lid_suspend(device_t dev); 57 static int acpi_lid_resume(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 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 80 static int 81 acpi_lid_probe(device_t dev) 82 { 83 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 84 !acpi_disabled("lid") && 85 acpi_MatchHid(dev, "PNP0C0D")) { 86 device_set_desc(dev, "Control Method Lid Switch"); 87 return(0); 88 } 89 return(ENXIO); 90 } 91 92 static int 93 acpi_lid_attach(device_t dev) 94 { 95 struct acpi_lid_softc *sc; 96 97 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 98 99 sc = device_get_softc(dev); 100 sc->lid_dev = dev; 101 sc->lid_handle = acpi_get_handle(dev); 102 103 /* 104 * Install notification handler 105 */ 106 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc); 107 acpi_device_enable_wake_capability(sc->lid_handle, 1); 108 return_VALUE(0); 109 } 110 111 static int 112 acpi_lid_suspend(device_t dev) 113 { 114 struct acpi_lid_softc *sc; 115 116 sc = device_get_softc(dev); 117 acpi_device_enable_wake_event(sc->lid_handle); 118 return (0); 119 } 120 121 static int 122 acpi_lid_resume(device_t dev) 123 { 124 return (0); 125 } 126 127 static void 128 acpi_lid_notify_status_changed(void *arg) 129 { 130 struct acpi_lid_softc *sc; 131 struct acpi_softc *acpi_sc; 132 133 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 134 135 sc = (struct acpi_lid_softc *)arg; 136 137 /* 138 * Evaluate _LID and check the return value, update lid status. 139 * Zero: The lid is closed 140 * Non-zero: The lid is open 141 */ 142 if (ACPI_FAILURE(acpi_EvaluateInteger(sc->lid_handle, "_LID", &sc->lid_status))) 143 return_VOID; 144 145 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 146 if (acpi_sc == NULL) { 147 return_VOID; 148 } 149 150 ACPI_VPRINT(sc->lid_dev, acpi_sc, 151 "Lid %s\n", sc->lid_status ? "opened" : "closed"); 152 153 if (sc->lid_status == 0) { 154 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 155 } else { 156 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 157 } 158 159 return_VOID; 160 } 161 162 /* XXX maybe not here */ 163 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 164 165 static void 166 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 167 { 168 struct acpi_lid_softc *sc = (struct acpi_lid_softc *)context; 169 170 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 171 172 switch (notify) { 173 case ACPI_NOTIFY_STATUS_CHANGED: 174 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc); 175 break; 176 default: 177 break; /* unknown notification value */ 178 } 179 return_VOID; 180 } 181 182