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 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/eventhandler.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/proc.h> 40 41 #include <contrib/dev/acpica/include/acpi.h> 42 #include <contrib/dev/acpica/include/accommon.h> 43 44 #include <dev/acpica/acpivar.h> 45 46 /* Hooks for the ACPI CA debugging infrastructure */ 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 ACPI_HANDLE acpi_lid_handle; 57 58 ACPI_SERIAL_DECL(lid, "ACPI lid"); 59 60 static int acpi_lid_probe(device_t dev); 61 static int acpi_lid_attach(device_t dev); 62 static int acpi_lid_suspend(device_t dev); 63 static int acpi_lid_resume(device_t dev); 64 static void acpi_lid_notify_status_changed(void *arg); 65 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, 66 void *context); 67 68 static device_method_t acpi_lid_methods[] = { 69 /* Device interface */ 70 DEVMETHOD(device_probe, acpi_lid_probe), 71 DEVMETHOD(device_attach, acpi_lid_attach), 72 DEVMETHOD(device_suspend, acpi_lid_suspend), 73 DEVMETHOD(device_resume, acpi_lid_resume), 74 75 DEVMETHOD_END 76 }; 77 78 static driver_t acpi_lid_driver = { 79 "acpi_lid", 80 acpi_lid_methods, 81 sizeof(struct acpi_lid_softc), 82 }; 83 84 static devclass_t acpi_lid_devclass; 85 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 86 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 87 88 static int 89 acpi_lid_probe(device_t dev) 90 { 91 static char *lid_ids[] = { "PNP0C0D", NULL }; 92 int rv; 93 94 if (acpi_disabled("lid")) 95 return (ENXIO); 96 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL); 97 if (rv <= 0) 98 device_set_desc(dev, "Control Method Lid Switch"); 99 return (rv); 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 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev); 113 114 /* 115 * If a system does not get lid events, it may make sense to change 116 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 117 * runtime notify in that case though. 118 */ 119 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 120 acpi_lid_notify_handler, sc); 121 122 /* Enable the GPE for wake/runtime. */ 123 acpi_wake_set_enable(dev, 1); 124 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 125 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 126 127 /* 128 * Export the lid status 129 */ 130 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 131 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 132 "state", CTLFLAG_RD, &sc->lid_status, 0, 133 "Device set to wake the system"); 134 135 return (0); 136 } 137 138 static int 139 acpi_lid_suspend(device_t dev) 140 { 141 return (0); 142 } 143 144 static int 145 acpi_lid_resume(device_t dev) 146 { 147 return (0); 148 } 149 150 static void 151 acpi_lid_notify_status_changed(void *arg) 152 { 153 struct acpi_lid_softc *sc; 154 struct acpi_softc *acpi_sc; 155 ACPI_STATUS status; 156 157 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 158 159 sc = (struct acpi_lid_softc *)arg; 160 ACPI_SERIAL_BEGIN(lid); 161 162 /* 163 * Evaluate _LID and check the return value, update lid status. 164 * Zero: The lid is closed 165 * Non-zero: The lid is open 166 */ 167 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status); 168 if (ACPI_FAILURE(status)) 169 goto out; 170 171 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 172 if (acpi_sc == NULL) 173 goto out; 174 175 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 176 sc->lid_status ? "opened" : "closed"); 177 178 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 179 180 if (sc->lid_status == 0) 181 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 182 else 183 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 184 185 out: 186 ACPI_SERIAL_END(lid); 187 return_VOID; 188 } 189 190 /* XXX maybe not here */ 191 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 192 193 static void 194 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 195 { 196 struct acpi_lid_softc *sc; 197 198 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 199 200 sc = (struct acpi_lid_softc *)context; 201 switch (notify) { 202 case ACPI_NOTIFY_STATUS_CHANGED: 203 AcpiOsExecute(OSL_NOTIFY_HANDLER, 204 acpi_lid_notify_status_changed, sc); 205 break; 206 default: 207 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 208 break; 209 } 210 211 return_VOID; 212 } 213