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 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 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 ACPI_SERIAL_DECL(lid, "ACPI lid"); 57 58 static int acpi_lid_probe(device_t dev); 59 static int acpi_lid_attach(device_t dev); 60 static int acpi_lid_suspend(device_t dev); 61 static int acpi_lid_resume(device_t dev); 62 static void acpi_lid_notify_status_changed(void *arg); 63 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, 64 void *context); 65 66 static device_method_t acpi_lid_methods[] = { 67 /* Device interface */ 68 DEVMETHOD(device_probe, acpi_lid_probe), 69 DEVMETHOD(device_attach, acpi_lid_attach), 70 DEVMETHOD(device_suspend, acpi_lid_suspend), 71 DEVMETHOD(device_resume, acpi_lid_resume), 72 73 DEVMETHOD_END 74 }; 75 76 static driver_t acpi_lid_driver = { 77 "acpi_lid", 78 acpi_lid_methods, 79 sizeof(struct acpi_lid_softc), 80 .gpri = KOBJ_GPRI_ACPI 81 }; 82 83 static devclass_t acpi_lid_devclass; 84 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, NULL, NULL); 85 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 86 87 static int 88 acpi_lid_probe(device_t dev) 89 { 90 static char *lid_ids[] = { "PNP0C0D", NULL }; 91 92 ACPI_SERIAL_INIT(lid); 93 94 if (acpi_disabled("lid") || 95 ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL) 96 return (ENXIO); 97 98 device_set_desc(dev, "Control Method Lid Switch"); 99 return (0); 100 } 101 102 static int 103 acpi_lid_attach(device_t dev) 104 { 105 struct acpi_prw_data prw; 106 struct acpi_lid_softc *sc; 107 108 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 109 110 sc = device_get_softc(dev); 111 sc->lid_dev = dev; 112 sc->lid_handle = acpi_get_handle(dev); 113 114 ACPI_SERIAL_INIT(lid); 115 116 /* 117 * If a system does not get lid events, it may make sense to change 118 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 119 * runtime notify in that case though. 120 */ 121 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 122 acpi_lid_notify_handler, sc); 123 124 /* Enable the GPE for wake/runtime */ 125 acpi_wake_set_enable(dev, 1); 126 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 127 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 128 129 return (0); 130 } 131 132 static int 133 acpi_lid_suspend(device_t dev) 134 { 135 return (0); 136 } 137 138 static int 139 acpi_lid_resume(device_t dev) 140 { 141 return (0); 142 } 143 144 static void 145 acpi_lid_notify_status_changed(void *arg) 146 { 147 struct acpi_lid_softc *sc; 148 struct acpi_softc *acpi_sc; 149 ACPI_STATUS status; 150 151 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 152 153 sc = (struct acpi_lid_softc *)arg; 154 ACPI_SERIAL_BEGIN(lid); 155 156 /* 157 * Evaluate _LID and check the return value, update lid status. 158 * Zero: The lid is closed 159 * Non-zero: The lid is open 160 */ 161 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status); 162 if (ACPI_FAILURE(status)) 163 goto out; 164 165 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 166 if (acpi_sc == NULL) 167 goto out; 168 169 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 170 sc->lid_status ? "opened" : "closed"); 171 172 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 173 174 if (sc->lid_status == 0) 175 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 176 else 177 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 178 179 out: 180 ACPI_SERIAL_END(lid); 181 return_VOID; 182 } 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