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 #include "opt_acpi.h" 32 #include "opt_evdev.h" 33 #include <sys/param.h> 34 #include <sys/eventhandler.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 #ifdef EVDEV_SUPPORT 46 #include <dev/evdev/input.h> 47 #include <dev/evdev/evdev.h> 48 #endif 49 50 /* Hooks for the ACPI CA debugging infrastructure */ 51 #define _COMPONENT ACPI_BUTTON 52 ACPI_MODULE_NAME("LID") 53 54 struct acpi_lid_softc { 55 device_t lid_dev; 56 ACPI_HANDLE lid_handle; 57 int lid_status; /* open or closed */ 58 #ifdef EVDEV_SUPPORT 59 struct evdev_dev *lid_evdev; 60 #endif 61 }; 62 63 ACPI_HANDLE acpi_lid_handle; 64 65 ACPI_SERIAL_DECL(lid, "ACPI lid"); 66 67 static int acpi_lid_probe(device_t dev); 68 static int acpi_lid_attach(device_t dev); 69 static int acpi_lid_suspend(device_t dev); 70 static int acpi_lid_resume(device_t dev); 71 static void acpi_lid_notify_status_changed(void *arg); 72 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, 73 void *context); 74 75 static device_method_t acpi_lid_methods[] = { 76 /* Device interface */ 77 DEVMETHOD(device_probe, acpi_lid_probe), 78 DEVMETHOD(device_attach, acpi_lid_attach), 79 DEVMETHOD(device_suspend, acpi_lid_suspend), 80 DEVMETHOD(device_resume, acpi_lid_resume), 81 82 DEVMETHOD_END 83 }; 84 85 static driver_t acpi_lid_driver = { 86 "acpi_lid", 87 acpi_lid_methods, 88 sizeof(struct acpi_lid_softc), 89 }; 90 91 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, 0, 0); 92 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 93 94 static void 95 acpi_lid_status_update(struct acpi_lid_softc *sc) 96 { 97 ACPI_STATUS status; 98 int lid_status; 99 100 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 101 102 /* 103 * Evaluate _LID and check the return value, update lid status. 104 * Zero: The lid is closed 105 * Non-zero: The lid is open 106 */ 107 status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status); 108 if (ACPI_FAILURE(status)) 109 lid_status = 1; /* assume lid is opened */ 110 111 /* range check value */ 112 sc->lid_status = lid_status ? 1 : 0; 113 114 /* Send notification via devd */ 115 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 116 117 #ifdef EVDEV_SUPPORT 118 /* Notify evdev about lid status */ 119 evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1); 120 evdev_sync(sc->lid_evdev); 121 #endif 122 } 123 124 static int 125 acpi_lid_probe(device_t dev) 126 { 127 static char *lid_ids[] = { "PNP0C0D", NULL }; 128 int rv; 129 130 if (acpi_disabled("lid")) 131 return (ENXIO); 132 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL); 133 if (rv <= 0) 134 device_set_desc(dev, "Control Method Lid Switch"); 135 return (rv); 136 } 137 138 static int 139 acpi_lid_attach(device_t dev) 140 { 141 struct acpi_prw_data prw; 142 struct acpi_lid_softc *sc; 143 144 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 145 146 sc = device_get_softc(dev); 147 sc->lid_dev = dev; 148 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev); 149 150 #ifdef EVDEV_SUPPORT 151 /* Register evdev device before initial status update */ 152 sc->lid_evdev = evdev_alloc(); 153 evdev_set_name(sc->lid_evdev, device_get_desc(dev)); 154 evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev)); 155 evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1); 156 evdev_support_event(sc->lid_evdev, EV_SYN); 157 evdev_support_event(sc->lid_evdev, EV_SW); 158 evdev_support_sw(sc->lid_evdev, SW_LID); 159 160 if (evdev_register(sc->lid_evdev)) 161 return (ENXIO); 162 #endif 163 164 /* 165 * If a system does not get lid events, it may make sense to change 166 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 167 * runtime notify in that case though. 168 */ 169 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 170 acpi_lid_notify_handler, sc); 171 172 /* Enable the GPE for wake/runtime. */ 173 acpi_wake_set_enable(dev, 1); 174 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 175 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 176 177 /* Get the initial lid status */ 178 acpi_lid_status_update(sc); 179 180 /* 181 * Export the lid status 182 */ 183 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 184 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 185 "state", CTLFLAG_RD, &sc->lid_status, 0, 186 "Device state (0 = closed, 1 = open)"); 187 188 return (0); 189 } 190 191 static int 192 acpi_lid_suspend(device_t dev) 193 { 194 return (0); 195 } 196 197 static int 198 acpi_lid_resume(device_t dev) 199 { 200 struct acpi_lid_softc *sc; 201 202 sc = device_get_softc(dev); 203 204 /* Update lid status, if any */ 205 acpi_lid_status_update(sc); 206 207 return (0); 208 } 209 210 static void 211 acpi_lid_notify_status_changed(void *arg) 212 { 213 struct acpi_lid_softc *sc; 214 struct acpi_softc *acpi_sc; 215 216 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 217 218 sc = (struct acpi_lid_softc *)arg; 219 ACPI_SERIAL_BEGIN(lid); 220 221 /* Update lid status, if any */ 222 acpi_lid_status_update(sc); 223 224 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 225 if (acpi_sc == NULL) 226 goto out; 227 228 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 229 sc->lid_status ? "opened" : "closed"); 230 231 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 232 233 if (sc->lid_status == 0) 234 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 235 else 236 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 237 238 out: 239 ACPI_SERIAL_END(lid); 240 return_VOID; 241 } 242 243 /* XXX maybe not here */ 244 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 245 246 static void 247 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 248 { 249 struct acpi_lid_softc *sc; 250 251 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 252 253 sc = (struct acpi_lid_softc *)context; 254 switch (notify) { 255 case ACPI_NOTIFY_STATUS_CHANGED: 256 AcpiOsExecute(OSL_NOTIFY_HANDLER, 257 acpi_lid_notify_status_changed, sc); 258 break; 259 default: 260 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 261 break; 262 } 263 264 return_VOID; 265 } 266