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 "opt_evdev.h" 35 #include <sys/param.h> 36 #include <sys/eventhandler.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/proc.h> 41 42 #include <contrib/dev/acpica/include/acpi.h> 43 #include <contrib/dev/acpica/include/accommon.h> 44 45 #include <dev/acpica/acpivar.h> 46 47 #ifdef EVDEV_SUPPORT 48 #include <dev/evdev/input.h> 49 #include <dev/evdev/evdev.h> 50 #endif 51 52 /* Hooks for the ACPI CA debugging infrastructure */ 53 #define _COMPONENT ACPI_BUTTON 54 ACPI_MODULE_NAME("LID") 55 56 struct acpi_lid_softc { 57 device_t lid_dev; 58 ACPI_HANDLE lid_handle; 59 int lid_status; /* open or closed */ 60 #ifdef EVDEV_SUPPORT 61 struct evdev_dev *lid_evdev; 62 #endif 63 }; 64 65 ACPI_HANDLE acpi_lid_handle; 66 67 ACPI_SERIAL_DECL(lid, "ACPI lid"); 68 69 static int acpi_lid_probe(device_t dev); 70 static int acpi_lid_attach(device_t dev); 71 static int acpi_lid_suspend(device_t dev); 72 static int acpi_lid_resume(device_t dev); 73 static void acpi_lid_notify_status_changed(void *arg); 74 static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, 75 void *context); 76 77 static device_method_t acpi_lid_methods[] = { 78 /* Device interface */ 79 DEVMETHOD(device_probe, acpi_lid_probe), 80 DEVMETHOD(device_attach, acpi_lid_attach), 81 DEVMETHOD(device_suspend, acpi_lid_suspend), 82 DEVMETHOD(device_resume, acpi_lid_resume), 83 84 DEVMETHOD_END 85 }; 86 87 static driver_t acpi_lid_driver = { 88 "acpi_lid", 89 acpi_lid_methods, 90 sizeof(struct acpi_lid_softc), 91 }; 92 93 static devclass_t acpi_lid_devclass; 94 DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 95 MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 96 97 static void 98 acpi_lid_status_update(struct acpi_lid_softc *sc) 99 { 100 ACPI_STATUS status; 101 int lid_status; 102 103 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 104 105 /* 106 * Evaluate _LID and check the return value, update lid status. 107 * Zero: The lid is closed 108 * Non-zero: The lid is open 109 */ 110 status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status); 111 if (ACPI_FAILURE(status)) 112 lid_status = 1; /* assume lid is opened */ 113 114 /* range check value */ 115 sc->lid_status = lid_status ? 1 : 0; 116 117 /* Send notification via devd */ 118 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 119 120 #ifdef EVDEV_SUPPORT 121 /* Notify evdev about lid status */ 122 evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1); 123 evdev_sync(sc->lid_evdev); 124 #endif 125 } 126 127 static int 128 acpi_lid_probe(device_t dev) 129 { 130 static char *lid_ids[] = { "PNP0C0D", NULL }; 131 int rv; 132 133 if (acpi_disabled("lid")) 134 return (ENXIO); 135 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL); 136 if (rv <= 0) 137 device_set_desc(dev, "Control Method Lid Switch"); 138 return (rv); 139 } 140 141 static int 142 acpi_lid_attach(device_t dev) 143 { 144 struct acpi_prw_data prw; 145 struct acpi_lid_softc *sc; 146 147 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 148 149 sc = device_get_softc(dev); 150 sc->lid_dev = dev; 151 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev); 152 153 #ifdef EVDEV_SUPPORT 154 /* Register evdev device before initial status update */ 155 sc->lid_evdev = evdev_alloc(); 156 evdev_set_name(sc->lid_evdev, device_get_desc(dev)); 157 evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev)); 158 evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1); 159 evdev_support_event(sc->lid_evdev, EV_SYN); 160 evdev_support_event(sc->lid_evdev, EV_SW); 161 evdev_support_sw(sc->lid_evdev, SW_LID); 162 163 if (evdev_register(sc->lid_evdev)) 164 return (ENXIO); 165 #endif 166 167 /* 168 * If a system does not get lid events, it may make sense to change 169 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 170 * runtime notify in that case though. 171 */ 172 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 173 acpi_lid_notify_handler, sc); 174 175 /* Enable the GPE for wake/runtime. */ 176 acpi_wake_set_enable(dev, 1); 177 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 178 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 179 180 /* Get the initial lid status */ 181 acpi_lid_status_update(sc); 182 183 /* 184 * Export the lid status 185 */ 186 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 187 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 188 "state", CTLFLAG_RD, &sc->lid_status, 0, 189 "Device state (0 = closed, 1 = open)"); 190 191 return (0); 192 } 193 194 static int 195 acpi_lid_suspend(device_t dev) 196 { 197 return (0); 198 } 199 200 static int 201 acpi_lid_resume(device_t dev) 202 { 203 struct acpi_lid_softc *sc; 204 205 sc = device_get_softc(dev); 206 207 /* Update lid status, if any */ 208 acpi_lid_status_update(sc); 209 210 return (0); 211 } 212 213 static void 214 acpi_lid_notify_status_changed(void *arg) 215 { 216 struct acpi_lid_softc *sc; 217 struct acpi_softc *acpi_sc; 218 219 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 220 221 sc = (struct acpi_lid_softc *)arg; 222 ACPI_SERIAL_BEGIN(lid); 223 224 /* Update lid status, if any */ 225 acpi_lid_status_update(sc); 226 227 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 228 if (acpi_sc == NULL) 229 goto out; 230 231 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 232 sc->lid_status ? "opened" : "closed"); 233 234 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 235 236 if (sc->lid_status == 0) 237 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 238 else 239 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 240 241 out: 242 ACPI_SERIAL_END(lid); 243 return_VOID; 244 } 245 246 /* XXX maybe not here */ 247 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 248 249 static void 250 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 251 { 252 struct acpi_lid_softc *sc; 253 254 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 255 256 sc = (struct acpi_lid_softc *)context; 257 switch (notify) { 258 case ACPI_NOTIFY_STATUS_CHANGED: 259 AcpiOsExecute(OSL_NOTIFY_HANDLER, 260 acpi_lid_notify_status_changed, sc); 261 break; 262 default: 263 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 264 break; 265 } 266 267 return_VOID; 268 } 269