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 ACPI_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 int acpi_lid_suspend(device_t dev); 59 static int acpi_lid_resume(device_t dev); 60 static void acpi_lid_notify_status_changed(void *arg); 61 static void acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context); 62 63 static device_method_t acpi_lid_methods[] = { 64 /* Device interface */ 65 DEVMETHOD(device_probe, acpi_lid_probe), 66 DEVMETHOD(device_attach, acpi_lid_attach), 67 DEVMETHOD(device_suspend, acpi_lid_suspend), 68 DEVMETHOD(device_resume, acpi_lid_resume), 69 70 {0, 0} 71 }; 72 73 static driver_t acpi_lid_driver = { 74 "acpi_lid", 75 acpi_lid_methods, 76 sizeof(struct acpi_lid_softc), 77 }; 78 79 static devclass_t acpi_lid_devclass; 80 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 81 82 static int 83 acpi_lid_probe(device_t dev) 84 { 85 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 86 !acpi_disabled("lid") && 87 acpi_MatchHid(dev, "PNP0C0D")) { 88 device_set_desc(dev, "Control Method Lid Switch"); 89 return(0); 90 } 91 return(ENXIO); 92 } 93 94 static int 95 acpi_lid_attach(device_t dev) 96 { 97 struct acpi_lid_softc *sc; 98 99 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 100 101 sc = device_get_softc(dev); 102 sc->lid_dev = dev; 103 sc->lid_handle = acpi_get_handle(dev); 104 105 /* 106 * Install notification handler 107 */ 108 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc); 109 acpi_device_enable_wake_capability(sc->lid_handle, 1); 110 return_VALUE(0); 111 } 112 113 static int 114 acpi_lid_suspend(device_t dev) 115 { 116 struct acpi_lid_softc *sc; 117 118 sc = device_get_softc(dev); 119 acpi_device_enable_wake_event(sc->lid_handle); 120 return (0); 121 } 122 123 static int 124 acpi_lid_resume(device_t dev) 125 { 126 return (0); 127 } 128 129 static void 130 acpi_lid_notify_status_changed(void *arg) 131 { 132 struct acpi_lid_softc *sc; 133 struct acpi_softc *acpi_sc; 134 135 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 136 137 sc = (struct acpi_lid_softc *)arg; 138 139 /* 140 * Evaluate _LID and check the return value, update lid status. 141 * Zero: The lid is closed 142 * Non-zero: The lid is open 143 */ 144 if (ACPI_FAILURE(acpi_EvaluateInteger(sc->lid_handle, "_LID", &sc->lid_status))) 145 return_VOID; 146 147 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 148 if (acpi_sc == NULL) { 149 return_VOID; 150 } 151 152 ACPI_VPRINT(sc->lid_dev, acpi_sc, 153 "Lid %s\n", sc->lid_status ? "opened" : "closed"); 154 155 if (sc->lid_status == 0) { 156 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 157 } else { 158 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 159 } 160 161 return_VOID; 162 } 163 164 /* XXX maybe not here */ 165 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 166 167 static void 168 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 169 { 170 struct acpi_lid_softc *sc = (struct acpi_lid_softc *)context; 171 172 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 173 174 switch (notify) { 175 case ACPI_NOTIFY_STATUS_CHANGED: 176 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc); 177 break; 178 default: 179 break; /* unknown notification value */ 180 } 181 return_VOID; 182 } 183 184