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/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/proc.h> 39 40 #include <contrib/dev/acpica/include/acpi.h> 41 #include <contrib/dev/acpica/include/accommon.h> 42 43 #include <dev/acpica/acpivar.h> 44 45 /* Hooks for the ACPI CA debugging infrastructure */ 46 #define _COMPONENT ACPI_BUTTON 47 ACPI_MODULE_NAME("LID") 48 49 struct acpi_lid_softc { 50 device_t lid_dev; 51 ACPI_HANDLE lid_handle; 52 int lid_status; /* open or closed */ 53 }; 54 55 ACPI_HANDLE acpi_lid_handle; 56 57 ACPI_SERIAL_DECL(lid, "ACPI lid"); 58 59 static int acpi_lid_probe(device_t dev); 60 static int acpi_lid_attach(device_t dev); 61 static int acpi_lid_suspend(device_t dev); 62 static int acpi_lid_resume(device_t dev); 63 static void acpi_lid_notify_status_changed(void *arg); 64 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, 65 void *context); 66 67 static device_method_t acpi_lid_methods[] = { 68 /* Device interface */ 69 DEVMETHOD(device_probe, acpi_lid_probe), 70 DEVMETHOD(device_attach, acpi_lid_attach), 71 DEVMETHOD(device_suspend, acpi_lid_suspend), 72 DEVMETHOD(device_resume, acpi_lid_resume), 73 74 DEVMETHOD_END 75 }; 76 77 static driver_t acpi_lid_driver = { 78 "acpi_lid", 79 acpi_lid_methods, 80 sizeof(struct acpi_lid_softc), 81 }; 82 83 static devclass_t acpi_lid_devclass; 84 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 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 int rv; 92 93 if (acpi_disabled("lid")) 94 return (ENXIO); 95 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL); 96 if (rv <= 0) 97 device_set_desc(dev, "Control Method Lid Switch"); 98 return (rv); 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 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev); 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 /* 127 * Export the lid status 128 */ 129 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 130 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 131 "state", CTLFLAG_RD, &sc->lid_status, 0, 132 "Device set to wake the system"); 133 134 return (0); 135 } 136 137 static int 138 acpi_lid_suspend(device_t dev) 139 { 140 return (0); 141 } 142 143 static int 144 acpi_lid_resume(device_t dev) 145 { 146 return (0); 147 } 148 149 static void 150 acpi_lid_notify_status_changed(void *arg) 151 { 152 struct acpi_lid_softc *sc; 153 struct acpi_softc *acpi_sc; 154 ACPI_STATUS status; 155 156 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 157 158 sc = (struct acpi_lid_softc *)arg; 159 ACPI_SERIAL_BEGIN(lid); 160 161 /* 162 * Evaluate _LID and check the return value, update lid status. 163 * Zero: The lid is closed 164 * Non-zero: The lid is open 165 */ 166 status = acpi_GetInteger(sc->lid_handle, "_LID", &sc->lid_status); 167 if (ACPI_FAILURE(status)) 168 goto out; 169 170 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 171 if (acpi_sc == NULL) 172 goto out; 173 174 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 175 sc->lid_status ? "opened" : "closed"); 176 177 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 178 179 if (sc->lid_status == 0) 180 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 181 else 182 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 183 184 out: 185 ACPI_SERIAL_END(lid); 186 return_VOID; 187 } 188 189 /* XXX maybe not here */ 190 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 191 192 static void 193 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 194 { 195 struct acpi_lid_softc *sc; 196 197 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 198 199 sc = (struct acpi_lid_softc *)context; 200 switch (notify) { 201 case ACPI_NOTIFY_STATUS_CHANGED: 202 AcpiOsExecute(OSL_NOTIFY_HANDLER, 203 acpi_lid_notify_status_changed, sc); 204 break; 205 default: 206 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 207 break; 208 } 209 210 return_VOID; 211 } 212