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 1.30 2009/06/05 18:44:36 jkim Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/proc.h> 38 39 #include "acpi.h" 40 #include "accommon.h" 41 42 #include <dev/acpica/acpivar.h> 43 44 /* Hooks for the ACPICA debugging infrastructure */ 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 ACPI_SERIAL_DECL(lid, "ACPI lid"); 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, 62 void *context); 63 64 static device_method_t acpi_lid_methods[] = { 65 /* Device interface */ 66 DEVMETHOD(device_probe, acpi_lid_probe), 67 DEVMETHOD(device_attach, acpi_lid_attach), 68 DEVMETHOD(device_suspend, acpi_lid_suspend), 69 DEVMETHOD(device_resume, acpi_lid_resume), 70 71 DEVMETHOD_END 72 }; 73 74 static driver_t acpi_lid_driver = { 75 "acpi_lid", 76 acpi_lid_methods, 77 sizeof(struct acpi_lid_softc), 78 }; 79 80 static devclass_t acpi_lid_devclass; 81 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, NULL, NULL); 82 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 83 84 static int 85 acpi_lid_probe(device_t dev) 86 { 87 static char *lid_ids[] = { "PNP0C0D", NULL }; 88 89 ACPI_SERIAL_INIT(lid); 90 91 if (acpi_disabled("lid") || 92 ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL) 93 return (ENXIO); 94 95 device_set_desc(dev, "Control Method Lid Switch"); 96 return (0); 97 } 98 99 static int 100 acpi_lid_attach(device_t dev) 101 { 102 struct acpi_prw_data prw; 103 struct acpi_lid_softc *sc; 104 105 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 106 107 sc = device_get_softc(dev); 108 sc->lid_dev = dev; 109 sc->lid_handle = acpi_get_handle(dev); 110 111 ACPI_SERIAL_INIT(lid); 112 113 /* 114 * If a system does not get lid events, it may make sense to change 115 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 116 * runtime notify in that case though. 117 */ 118 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 119 acpi_lid_notify_handler, sc); 120 121 /* Enable the GPE for wake/runtime */ 122 acpi_wake_set_enable(dev, 1); 123 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 124 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 125 126 return (0); 127 } 128 129 static int 130 acpi_lid_suspend(device_t dev) 131 { 132 return (0); 133 } 134 135 static int 136 acpi_lid_resume(device_t dev) 137 { 138 return (0); 139 } 140 141 static void 142 acpi_lid_notify_status_changed(void *arg) 143 { 144 struct acpi_lid_softc *sc; 145 struct acpi_softc *acpi_sc; 146 ACPI_STATUS status; 147 148 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 149 150 sc = (struct acpi_lid_softc *)arg; 151 ACPI_SERIAL_BEGIN(lid); 152 153 /* 154 * Evaluate _LID and check the return value, update lid status. 155 * Zero: The lid is closed 156 * Non-zero: The lid is open 157 */ 158 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status); 159 if (ACPI_FAILURE(status)) 160 goto out; 161 162 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 163 if (acpi_sc == NULL) 164 goto out; 165 166 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 167 sc->lid_status ? "opened" : "closed"); 168 169 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 170 171 if (sc->lid_status == 0) 172 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 173 else 174 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 175 176 out: 177 ACPI_SERIAL_END(lid); 178 return_VOID; 179 } 180 181 /* XXX maybe not here */ 182 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 183 184 static void 185 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 186 { 187 struct acpi_lid_softc *sc; 188 189 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 190 191 sc = (struct acpi_lid_softc *)context; 192 switch (notify) { 193 case ACPI_NOTIFY_STATUS_CHANGED: 194 AcpiOsExecute(OSL_NOTIFY_HANDLER, 195 acpi_lid_notify_status_changed, sc); 196 break; 197 default: 198 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 199 break; 200 } 201 202 return_VOID; 203 } 204