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: stable/11/sys/dev/acpica/acpi_lid.c 358884 2020-03-11 08:34:29Z hselasky $"); 32 33#include "opt_acpi.h" 34#include "opt_evdev.h" 35#include <sys/param.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#ifdef EVDEV_SUPPORT 47#include <dev/evdev/input.h> 48#include <dev/evdev/evdev.h> 49#endif 50 51/* Hooks for the ACPI CA debugging infrastructure */ 52#define _COMPONENT ACPI_BUTTON 53ACPI_MODULE_NAME("LID") 54 55struct acpi_lid_softc { 56 device_t lid_dev; 57 ACPI_HANDLE lid_handle; 58 int lid_status; /* open or closed */ 59#ifdef EVDEV_SUPPORT 60 struct evdev_dev *lid_evdev; 61#endif 62}; 63 64ACPI_HANDLE acpi_lid_handle; 65 66ACPI_SERIAL_DECL(lid, "ACPI lid"); 67 68static int acpi_lid_probe(device_t dev); 69static int acpi_lid_attach(device_t dev); 70static int acpi_lid_suspend(device_t dev); 71static int acpi_lid_resume(device_t dev); 72static void acpi_lid_notify_status_changed(void *arg); 73static void acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, 74 void *context); 75 76static device_method_t acpi_lid_methods[] = { 77 /* Device interface */ 78 DEVMETHOD(device_probe, acpi_lid_probe), 79 DEVMETHOD(device_attach, acpi_lid_attach), 80 DEVMETHOD(device_suspend, acpi_lid_suspend), 81 DEVMETHOD(device_resume, acpi_lid_resume), 82 83 DEVMETHOD_END 84}; 85 86static driver_t acpi_lid_driver = { 87 "acpi_lid", 88 acpi_lid_methods, 89 sizeof(struct acpi_lid_softc), 90}; 91 92static devclass_t acpi_lid_devclass; 93DRIVER_MODULE(acpi_lid, acpi, acpi_lid_driver, acpi_lid_devclass, 0, 0); 94MODULE_DEPEND(acpi_lid, acpi, 1, 1, 1); 95 96static void 97acpi_lid_status_update(struct acpi_lid_softc *sc) 98{ 99 ACPI_STATUS status; 100 int lid_status; 101 102 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 103 104 /* 105 * Evaluate _LID and check the return value, update lid status. 106 * Zero: The lid is closed 107 * Non-zero: The lid is open 108 */ 109 status = acpi_GetInteger(sc->lid_handle, "_LID", &lid_status); 110 if (ACPI_FAILURE(status)) 111 lid_status = 1; /* assume lid is opened */ 112 113 /* range check value */ 114 sc->lid_status = lid_status ? 1 : 0; 115 116#ifdef EVDEV_SUPPORT 117 /* Notify evdev about lid status */ 118 evdev_push_sw(sc->lid_evdev, SW_LID, lid_status ? 0 : 1); 119 evdev_sync(sc->lid_evdev); 120#endif 121} 122 123static int 124acpi_lid_probe(device_t dev) 125{ 126 static char *lid_ids[] = { "PNP0C0D", NULL }; 127 128 if (acpi_disabled("lid") || 129 ACPI_ID_PROBE(device_get_parent(dev), dev, lid_ids) == NULL) 130 return (ENXIO); 131 132 device_set_desc(dev, "Control Method Lid Switch"); 133 return (0); 134} 135 136static int 137acpi_lid_attach(device_t dev) 138{ 139 struct acpi_prw_data prw; 140 struct acpi_lid_softc *sc; 141 142 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 143 144 sc = device_get_softc(dev); 145 sc->lid_dev = dev; 146 acpi_lid_handle = sc->lid_handle = acpi_get_handle(dev); 147 148#ifdef EVDEV_SUPPORT 149 /* Register evdev device before initial status update */ 150 sc->lid_evdev = evdev_alloc(); 151 evdev_set_name(sc->lid_evdev, device_get_desc(dev)); 152 evdev_set_phys(sc->lid_evdev, device_get_nameunit(dev)); 153 evdev_set_id(sc->lid_evdev, BUS_HOST, 0, 0, 1); 154 evdev_support_event(sc->lid_evdev, EV_SYN); 155 evdev_support_event(sc->lid_evdev, EV_SW); 156 evdev_support_sw(sc->lid_evdev, SW_LID); 157 158 if (evdev_register(sc->lid_evdev)) 159 return (ENXIO); 160#endif 161 162 /* 163 * If a system does not get lid events, it may make sense to change 164 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake and 165 * runtime notify in that case though. 166 */ 167 AcpiInstallNotifyHandler(sc->lid_handle, ACPI_DEVICE_NOTIFY, 168 acpi_lid_notify_handler, sc); 169 170 /* Enable the GPE for wake/runtime. */ 171 acpi_wake_set_enable(dev, 1); 172 if (acpi_parse_prw(sc->lid_handle, &prw) == 0) 173 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 174 175 /* Get the initial lid status */ 176 acpi_lid_status_update(sc); 177 178 /* 179 * Export the lid status 180 */ 181 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 182 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 183 "state", CTLFLAG_RD, &sc->lid_status, 0, 184 "Device state (0 = closed, 1 = open)"); 185 186 return (0); 187} 188 189static int 190acpi_lid_suspend(device_t dev) 191{ 192 return (0); 193} 194 195static int 196acpi_lid_resume(device_t dev) 197{ 198 struct acpi_lid_softc *sc; 199 200 sc = device_get_softc(dev); 201 202 /* Update lid status, if any */ 203 acpi_lid_status_update(sc); 204 205 return (0); 206} 207 208static void 209acpi_lid_notify_status_changed(void *arg) 210{ 211 struct acpi_lid_softc *sc; 212 struct acpi_softc *acpi_sc; 213 214 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 215 216 sc = (struct acpi_lid_softc *)arg; 217 ACPI_SERIAL_BEGIN(lid); 218 219 /* Update lid status, if any */ 220 acpi_lid_status_update(sc); 221 222 acpi_sc = acpi_device_get_parent_softc(sc->lid_dev); 223 if (acpi_sc == NULL) 224 goto out; 225 226 ACPI_VPRINT(sc->lid_dev, acpi_sc, "Lid %s\n", 227 sc->lid_status ? "opened" : "closed"); 228 229 acpi_UserNotify("Lid", sc->lid_handle, sc->lid_status); 230 231 if (sc->lid_status == 0) 232 EVENTHANDLER_INVOKE(acpi_sleep_event, acpi_sc->acpi_lid_switch_sx); 233 else 234 EVENTHANDLER_INVOKE(acpi_wakeup_event, acpi_sc->acpi_lid_switch_sx); 235 236out: 237 ACPI_SERIAL_END(lid); 238 return_VOID; 239} 240 241/* XXX maybe not here */ 242#define ACPI_NOTIFY_STATUS_CHANGED 0x80 243 244static void 245acpi_lid_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 246{ 247 struct acpi_lid_softc *sc; 248 249 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 250 251 sc = (struct acpi_lid_softc *)context; 252 switch (notify) { 253 case ACPI_NOTIFY_STATUS_CHANGED: 254 AcpiOsExecute(OSL_NOTIFY_HANDLER, 255 acpi_lid_notify_status_changed, sc); 256 break; 257 default: 258 device_printf(sc->lid_dev, "unknown notify %#x\n", notify); 259 break; 260 } 261 262 return_VOID; 263} 264