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 int 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 else 111 lid_status = (lid_status != 0); /* range check value */ 112 113 if (sc->lid_status == lid_status) 114 return (EALREADY); 115 sc->lid_status = lid_status; 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 return (0); 126 } 127 128 static int 129 acpi_lid_probe(device_t dev) 130 { 131 static char *lid_ids[] = { "PNP0C0D", NULL }; 132 int rv; 133 134 if (acpi_disabled("lid")) 135 return (ENXIO); 136 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids, NULL); 137 if (rv <= 0) 138 device_set_desc(dev, "Control Method Lid Switch"); 139 return (rv); 140 } 141 142 static int 143 acpi_lid_attach(device_t dev) 144 { 145 struct acpi_prw_data prw; 146 struct acpi_lid_softc *sc; 147 148 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 149 150 sc = device_get_softc(dev); 151 sc->lid_dev = dev; 152 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev); 153 sc->lid_status = -1; 154 155 #ifdef EVDEV_SUPPORT 156 /* Register evdev device before initial status update */ 157 sc->lid_evdev = evdev_alloc(); 158 evdev_set_name(sc->lid_evdev, device_get_desc(dev)); 159 evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev)); 160 evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1); 161 evdev_support_event(sc->lid_evdev, EV_SYN); 162 evdev_support_event(sc->lid_evdev, EV_SW); 163 evdev_support_sw(sc->lid_evdev, SW_LID); 164 165 if (evdev_register(sc->lid_evdev)) 166 return (ENXIO); 167 #endif 168 169 /* 170 * If a system does not get lid events, it may make sense to change 171 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 172 * runtime notify in that case though. 173 */ 174 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 175 acpi_lid_notify_handler, sc); 176 177 /* Enable the GPE for wake/runtime. */ 178 acpi_wake_set_enable(dev, 1); 179 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 180 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 181 182 /* Get the initial lid status */ 183 acpi_lid_status_update(sc); 184 185 /* 186 * Export the lid status 187 */ 188 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 189 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 190 "state", CTLFLAG_RD, &sc->lid_status, 0, 191 "Device state (0 = closed, 1 = open)"); 192 193 return (0); 194 } 195 196 static int 197 acpi_lid_suspend(device_t dev) 198 { 199 return (0); 200 } 201 202 static int 203 acpi_lid_resume(device_t dev) 204 { 205 struct acpi_lid_softc *sc; 206 207 sc = device_get_softc(dev); 208 209 /* Update lid status, if any */ 210 acpi_lid_status_update(sc); 211 212 return (0); 213 } 214 215 static void 216 acpi_lid_notify_status_changed(void *arg) 217 { 218 struct acpi_lid_softc *sc; 219 struct acpi_softc *acpi_sc; 220 221 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 222 223 sc = (struct acpi_lid_softc *)arg; 224 ACPI_SERIAL_BEGIN(lid); 225 226 /* Update lid status, if any */ 227 if (acpi_lid_status_update(sc) != 0) 228 goto out; 229 230 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 231 if (acpi_sc == NULL) 232 goto out; 233 234 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 235 sc->lid_status ? "opened" : "closed"); 236 237 if (sc->lid_status == 0) 238 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 239 else 240 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 241 242 out: 243 ACPI_SERIAL_END(lid); 244 return_VOID; 245 } 246 247 /* XXX maybe not here */ 248 #define ACPI_NOTIFY_STATUS_CHANGED 0x80 249 250 static void 251 acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 252 { 253 struct acpi_lid_softc *sc; 254 255 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 256 257 sc = (struct acpi_lid_softc *)context; 258 switch (notify) { 259 case ACPI_NOTIFY_STATUS_CHANGED: 260 AcpiOsExecute(OSL_NOTIFY_HANDLER, 261 acpi_lid_notify_status_changed, sc); 262 break; 263 default: 264 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 265 break; 266 } 267 268 return_VOID; 269 } 270