acpi_button.c revision 128071
1/*- 2 * Copyright (c) 2000 Mitsaru IWASAKI <iwasaki@jp.freebsd.org> 3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000 BSDi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/dev/acpica/acpi_button.c 128071 2004-04-09 18:14:32Z njl $ 29 */ 30 31#include "opt_acpi.h" 32#include <sys/param.h> 33#include <sys/kernel.h> 34#include <sys/bus.h> 35 36#include "acpi.h" 37#include <dev/acpica/acpivar.h> 38 39/* Hooks for the ACPI CA debugging infrastructure */ 40#define _COMPONENT ACPI_BUTTON 41ACPI_MODULE_NAME("BUTTON") 42 43struct acpi_button_softc { 44 device_t button_dev; 45 ACPI_HANDLE button_handle; 46 boolean_t button_type; 47#define ACPI_POWER_BUTTON 0 48#define ACPI_SLEEP_BUTTON 1 49 boolean_t fixed; 50}; 51 52#define ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP 0x80 53#define ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP 0x02 54 55static int acpi_button_probe(device_t dev); 56static int acpi_button_attach(device_t dev); 57static int acpi_button_suspend(device_t dev); 58static int acpi_button_resume(device_t dev); 59static void acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, 60 void *context); 61static ACPI_STATUS 62 acpi_button_fixed_handler(void *context); 63static void acpi_button_notify_sleep(void *arg); 64static void acpi_button_notify_wakeup(void *arg); 65 66static device_method_t acpi_button_methods[] = { 67 /* Device interface */ 68 DEVMETHOD(device_probe, acpi_button_probe), 69 DEVMETHOD(device_attach, acpi_button_attach), 70 DEVMETHOD(device_suspend, acpi_button_suspend), 71 DEVMETHOD(device_shutdown, acpi_button_suspend), 72 DEVMETHOD(device_resume, acpi_button_resume), 73 74 {0, 0} 75}; 76 77static driver_t acpi_button_driver = { 78 "acpi_button", 79 acpi_button_methods, 80 sizeof(struct acpi_button_softc), 81}; 82 83static devclass_t acpi_button_devclass; 84DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass, 85 0, 0); 86MODULE_DEPEND(acpi_button, acpi, 1, 1, 1); 87 88static int 89acpi_button_probe(device_t dev) 90{ 91 struct acpi_button_softc *sc; 92 int ret = ENXIO; 93 94 sc = device_get_softc(dev); 95 if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("button")) { 96 if (acpi_MatchHid(dev, "PNP0C0C")) { 97 device_set_desc(dev, "Power Button"); 98 sc->button_type = ACPI_POWER_BUTTON; 99 ret = 0; 100 } else if (acpi_MatchHid(dev, "ACPI_FPB")) { 101 device_set_desc(dev, "Power Button (fixed)"); 102 sc->button_type = ACPI_POWER_BUTTON; 103 sc->fixed = 1; 104 ret = 0; 105 } else if (acpi_MatchHid(dev, "PNP0C0E")) { 106 device_set_desc(dev, "Sleep Button"); 107 sc->button_type = ACPI_SLEEP_BUTTON; 108 ret = 0; 109 } else if (acpi_MatchHid(dev, "ACPI_FSB")) { 110 device_set_desc(dev, "Sleep Button (fixed)"); 111 sc->button_type = ACPI_SLEEP_BUTTON; 112 sc->fixed = 1; 113 ret = 0; 114 } 115 } 116 return (ret); 117} 118 119static int 120acpi_button_attach(device_t dev) 121{ 122 struct acpi_button_softc *sc; 123 ACPI_STATUS status; 124 int event; 125 126 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 127 128 sc = device_get_softc(dev); 129 sc->button_dev = dev; 130 sc->button_handle = acpi_get_handle(dev); 131 event = (sc->button_type == ACPI_SLEEP_BUTTON) ? 132 ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON; 133 134 /* 135 * Install the new handler. We could remove any fixed handlers added 136 * from the FADT once we have a duplicate from the AML but some systems 137 * only return events on one or the other so we have to keep both. 138 */ 139 if (sc->fixed) { 140 AcpiClearEvent(event); 141 status = AcpiInstallFixedEventHandler(event, 142 acpi_button_fixed_handler, sc); 143 } else { 144 status = AcpiInstallNotifyHandler(sc->button_handle, 145 ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc); 146 } 147 if (ACPI_FAILURE(status)) { 148 device_printf(sc->button_dev, "couldn't install notify handler - %s\n", 149 AcpiFormatException(status)); 150 return_VALUE (ENXIO); 151 } 152 acpi_device_enable_wake_capability(sc->button_handle, 1); 153 154 return_VALUE (0); 155} 156 157static int 158acpi_button_suspend(device_t dev) 159{ 160 struct acpi_button_softc *sc; 161 162 sc = device_get_softc(dev); 163 acpi_device_enable_wake_event(sc->button_handle); 164 return (0); 165} 166 167static int 168acpi_button_resume(device_t dev) 169{ 170 return (0); 171} 172 173static void 174acpi_button_notify_sleep(void *arg) 175{ 176 struct acpi_button_softc *sc; 177 struct acpi_softc *acpi_sc; 178 179 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 180 181 sc = (struct acpi_button_softc *)arg; 182 acpi_sc = acpi_device_get_parent_softc(sc->button_dev); 183 if (acpi_sc == NULL) 184 return_VOID; 185 186 acpi_UserNotify("Button", sc->button_handle, sc->button_type); 187 188 switch (sc->button_type) { 189 case ACPI_POWER_BUTTON: 190 ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n"); 191 acpi_event_power_button_sleep(acpi_sc); 192 break; 193 case ACPI_SLEEP_BUTTON: 194 ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n"); 195 acpi_event_sleep_button_sleep(acpi_sc); 196 break; 197 default: 198 break; /* unknown button type */ 199 } 200} 201 202static void 203acpi_button_notify_wakeup(void *arg) 204{ 205 struct acpi_button_softc *sc; 206 struct acpi_softc *acpi_sc; 207 208 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 209 210 sc = (struct acpi_button_softc *)arg; 211 acpi_sc = acpi_device_get_parent_softc(sc->button_dev); 212 if (acpi_sc == NULL) 213 return_VOID; 214 215 acpi_UserNotify("Button", sc->button_handle, sc->button_type); 216 217 switch (sc->button_type) { 218 case ACPI_POWER_BUTTON: 219 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n"); 220 acpi_event_power_button_wake(acpi_sc); 221 break; 222 case ACPI_SLEEP_BUTTON: 223 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n"); 224 acpi_event_sleep_button_wake(acpi_sc); 225 break; 226 default: 227 break; /* unknown button type */ 228 } 229} 230 231static void 232acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 233{ 234 struct acpi_button_softc *sc = (struct acpi_button_softc *)context; 235 236 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 237 238 switch (notify) { 239 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP: 240 AcpiOsQueueForExecution(OSD_PRIORITY_LO, 241 acpi_button_notify_sleep, sc); 242 break; 243 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP: 244 AcpiOsQueueForExecution(OSD_PRIORITY_LO, 245 acpi_button_notify_wakeup, sc); 246 break; 247 default: 248 break; /* unknown notification value */ 249 } 250} 251 252static ACPI_STATUS 253acpi_button_fixed_handler(void *context) 254{ 255 struct acpi_button_softc *sc = (struct acpi_button_softc *)context; 256 257 ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context); 258 259 if (context == NULL) 260 return_ACPI_STATUS (AE_BAD_PARAMETER); 261 262 acpi_button_notify_handler(sc->button_handle, 263 ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc); 264 return_ACPI_STATUS (AE_OK); 265} 266