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 }; 81 82 static devclass_t acpi_lid_devclass; 83 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, NULL, NULL); 84 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 85 86 static int 87 acpi_lid_probe(device_t dev) 88 { 89 static char *lid_ids[] = { "PNP0C0D", NULL }; 90 91 ACPI_SERIAL_INIT(lid); 92 93 if (acpi_disabled("lid") || 94 ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL) 95 return (ENXIO); 96 97 device_set_desc(dev, "Control Method Lid Switch"); 98 return (0); 99 } 100 101 static int 102 acpi_lid_attach(device_t dev) 103 { 104 struct acpi_prw_data prw; 105 struct acpi_lid_softc *sc; 106 107 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 108 109 sc = device_get_softc(dev); 110 sc->lid_dev = dev; 111 sc->lid_handle = acpi_get_handle(dev); 112 113 ACPI_SERIAL_INIT(lid); 114 115 /* 116 * If a system does not get lid events, it may make sense to change 117 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 118 * runtime notify in that case though. 119 */ 120 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 121 acpi_lid_notify_handler, sc); 122 123 /* Enable the GPE for wake/runtime */ 124 acpi_wake_set_enable(dev, 1); 125 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 126 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 127 128 return (0); 129 } 130 131 static int 132 acpi_lid_suspend(device_t dev) 133 { 134 return (0); 135 } 136 137 static int 138 acpi_lid_resume(device_t dev) 139 { 140 return (0); 141 } 142 143 static void 144 acpi_lid_notify_status_changed(void *arg) 145 { 146 struct acpi_lid_softc *sc; 147 struct acpi_softc *acpi_sc; 148 ACPI_STATUS status; 149 150 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 151 152 sc = (struct acpi_lid_softc *)arg; 153 ACPI_SERIAL_BEGIN(lid); 154 155 /* 156 * Evaluate _LID and check the return value, update lid status. 157 * Zero: The lid is closed 158 * Non-zero: The lid is open 159 */ 160 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status); 161 if (ACPI_FAILURE(status)) 162 goto out; 163 164 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 165 if (acpi_sc == NULL) 166 goto out; 167 168 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 169 sc->lid_status ? "opened" : "closed"); 170 171 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 172 173 if (sc->lid_status == 0) 174 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 175 else 176 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 177 178 out: 179 ACPI_SERIAL_END(lid); 180 return_VOID; 181 } 182 183 static void 184 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 185 { 186 struct acpi_lid_softc *sc; 187 188 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 189 190 sc = (struct acpi_lid_softc *)context; 191 switch (notify) { 192 case ACPI_NOTIFY_STATUS_CHANGED: 193 AcpiOsExecute(OSL_NOTIFY_HANDLER, 194 acpi_lid_notify_status_changed, sc); 195 break; 196 default: 197 device_printf(sc->lid_dev, "unknown notify: %#x\n", notify); 198 break; 199 } 200 201 return_VOID; 202 } 203