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 37 #include "acpi.h" 38 39 #include <dev/acpica/acpivar.h> 40 41 struct acpi_lid_softc { 42 device_t lid_dev; 43 ACPI_HANDLE lid_handle; 44 int lid_status; /* open or closed */ 45 }; 46 47 static int acpi_lid_probe(device_t dev); 48 static int acpi_lid_attach(device_t dev); 49 static void acpi_lid_notify_status_changed(void *arg); 50 static void acpi_lid_notify_handler(ACPI_HANDLE h,UINT32 notify, void *context); 51 52 static device_method_t acpi_lid_methods[] = { 53 /* Device interface */ 54 DEVMETHOD(device_probe, acpi_lid_probe), 55 DEVMETHOD(device_attach, acpi_lid_attach), 56 57 {0, 0} 58 }; 59 60 static driver_t acpi_lid_driver = { 61 "acpi_lid", 62 acpi_lid_methods, 63 sizeof(struct acpi_lid_softc), 64 }; 65 66 devclass_t acpi_lid_devclass; 67 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 68 69 static int 70 acpi_lid_probe(device_t dev) 71 { 72 if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && 73 acpi_MatchHid(dev, "PNP0C0D")) { 74 device_set_desc(dev, "Control Method Lid Switch"); 75 return(0); 76 } 77 return(ENXIO); 78 } 79 80 static int 81 acpi_lid_attach(device_t dev) 82 { 83 struct acpi_lid_softc *sc; 84 85 sc = device_get_softc(dev); 86 sc->lid_dev = dev; 87 sc->lid_handle = acpi_get_handle(dev); 88 89 /* 90 * Install notification handler 91 */ 92 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, acpi_lid_notify_handler, sc); 93 return(0); 94 } 95 96 static void 97 acpi_lid_notify_status_changed(void *arg) 98 { 99 struct acpi_lid_softc *sc; 100 struct acpi_softc *acpi_sc; 101 ACPI_BUFFER Buffer; 102 ACPI_OBJECT Object; 103 104 sc = (struct acpi_lid_softc *)arg; 105 106 /* 107 * Evaluate _LID and check the return value 108 * Zero: The lid is closed 109 * Non-zero: The lid is open 110 */ 111 Buffer.Length = sizeof(Object); 112 Buffer.Pointer = &Object; 113 if (AcpiEvaluateObject(sc->lid_handle, "_LID", NULL, &Buffer) != AE_OK) 114 return; 115 if (Object.Type != ACPI_TYPE_NUMBER) 116 return; 117 118 /* 119 * Update lid status 120 */ 121 sc->lid_status = Object.Number.Value; 122 device_printf(sc->lid_dev, "Lid %s\n", sc->lid_status ? "opened" : "closed"); 123 124 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 125 if (acpi_sc == NULL) { 126 return; 127 } 128 129 if (sc->lid_status == 0) { 130 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 131 } else { 132 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 133 } 134 } 135 136 /* XXX maybe not here */ 137 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 138 139 static void 140 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 141 { 142 struct acpi_lid_softc *sc = (struct acpi_lid_softc *)context; 143 144 switch (notify) { 145 case ACPI_NOTIFY_STATUS_CHANGED: 146 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_lid_notify_status_changed, sc); 147 break; 148 default: 149 return; /* unknown notification value */ 150 } 151 } 152 153