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 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 38 #include <contrib/dev/acpica/include/acpi.h> 39 #include <contrib/dev/acpica/include/accommon.h> 40 41 #include <dev/acpica/acpivar.h> 42 43 /* Hooks for the ACPI CA debugging infrastructure */ 44 #define _COMPONENT ACPI_BUTTON 45 ACPI_MODULE_NAME("BUTTON") 46 47 struct acpi_button_softc { 48 device_t button_dev; 49 ACPI_HANDLE button_handle; 50 boolean_t button_type; 51 #define ACPI_POWER_BUTTON 0 52 #define ACPI_SLEEP_BUTTON 1 53 boolean_t fixed; 54 }; 55 56 #define ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP 0x80 57 #define ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP 0x02 58 59 static int acpi_button_probe(device_t dev); 60 static int acpi_button_attach(device_t dev); 61 static int acpi_button_suspend(device_t dev); 62 static int acpi_button_resume(device_t dev); 63 static void acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, 64 void *context); 65 static ACPI_STATUS 66 acpi_button_fixed_handler(void *context); 67 static void acpi_button_notify_sleep(void *arg); 68 static void acpi_button_notify_wakeup(void *arg); 69 70 static char *btn_ids[] = { 71 "PNP0C0C", "ACPI_FPB", "PNP0C0E", "ACPI_FSB", 72 NULL 73 }; 74 75 static device_method_t acpi_button_methods[] = { 76 /* Device interface */ 77 DEVMETHOD(device_probe, acpi_button_probe), 78 DEVMETHOD(device_attach, acpi_button_attach), 79 DEVMETHOD(device_suspend, acpi_button_suspend), 80 DEVMETHOD(device_shutdown, acpi_button_suspend), 81 DEVMETHOD(device_resume, acpi_button_resume), 82 DEVMETHOD_END 83 }; 84 85 static driver_t acpi_button_driver = { 86 "acpi_button", 87 acpi_button_methods, 88 sizeof(struct acpi_button_softc), 89 }; 90 91 static devclass_t acpi_button_devclass; 92 DRIVER_MODULE(acpi_button, acpi, acpi_button_driver, acpi_button_devclass, 93 0, 0); 94 MODULE_DEPEND(acpi_button, acpi, 1, 1, 1); 95 96 static int 97 acpi_button_probe(device_t dev) 98 { 99 struct acpi_button_softc *sc; 100 char *str; 101 int rv; 102 103 if (acpi_disabled("button")) 104 return (ENXIO); 105 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, btn_ids, &str); 106 if (rv > 0) 107 return (ENXIO); 108 109 sc = device_get_softc(dev); 110 if (strcmp(str, "PNP0C0C") == 0) { 111 device_set_desc(dev, "Power Button"); 112 sc->button_type = ACPI_POWER_BUTTON; 113 } else if (strcmp(str, "ACPI_FPB") == 0) { 114 device_set_desc(dev, "Power Button (fixed)"); 115 sc->button_type = ACPI_POWER_BUTTON; 116 sc->fixed = 1; 117 } else if (strcmp(str, "PNP0C0E") == 0) { 118 device_set_desc(dev, "Sleep Button"); 119 sc->button_type = ACPI_SLEEP_BUTTON; 120 } else if (strcmp(str, "ACPI_FSB") == 0) { 121 device_set_desc(dev, "Sleep Button (fixed)"); 122 sc->button_type = ACPI_SLEEP_BUTTON; 123 sc->fixed = 1; 124 } 125 126 return (rv); 127 } 128 129 static int 130 acpi_button_attach(device_t dev) 131 { 132 struct acpi_prw_data prw; 133 struct acpi_button_softc *sc; 134 ACPI_STATUS status; 135 int event; 136 137 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 138 139 sc = device_get_softc(dev); 140 sc->button_dev = dev; 141 sc->button_handle = acpi_get_handle(dev); 142 event = (sc->button_type == ACPI_SLEEP_BUTTON) ? 143 ACPI_EVENT_SLEEP_BUTTON : ACPI_EVENT_POWER_BUTTON; 144 145 /* 146 * Install the new handler. We could remove any fixed handlers added 147 * from the FADT once we have a duplicate from the AML but some systems 148 * only return events on one or the other so we have to keep both. 149 */ 150 if (sc->fixed) { 151 AcpiClearEvent(event); 152 status = AcpiInstallFixedEventHandler(event, 153 acpi_button_fixed_handler, sc); 154 } else { 155 /* 156 * If a system does not get lid events, it may make sense to change 157 * the type to ACPI_ALL_NOTIFY. Some systems generate both a wake 158 * and runtime notify in that case though. 159 */ 160 status = AcpiInstallNotifyHandler(sc->button_handle, 161 ACPI_DEVICE_NOTIFY, acpi_button_notify_handler, sc); 162 } 163 if (ACPI_FAILURE(status)) { 164 device_printf(sc->button_dev, "couldn't install notify handler - %s\n", 165 AcpiFormatException(status)); 166 return_VALUE (ENXIO); 167 } 168 169 /* Enable the GPE for wake/runtime. */ 170 acpi_wake_set_enable(dev, 1); 171 if (acpi_parse_prw(sc->button_handle, &prw) == 0) 172 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit); 173 174 return_VALUE (0); 175 } 176 177 static int 178 acpi_button_suspend(device_t dev) 179 { 180 return (0); 181 } 182 183 static int 184 acpi_button_resume(device_t dev) 185 { 186 return (0); 187 } 188 189 static void 190 acpi_button_notify_sleep(void *arg) 191 { 192 struct acpi_button_softc *sc; 193 struct acpi_softc *acpi_sc; 194 195 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 196 197 sc = (struct acpi_button_softc *)arg; 198 acpi_sc = acpi_device_get_parent_softc(sc->button_dev); 199 if (acpi_sc == NULL) 200 return_VOID; 201 202 acpi_UserNotify("Button", sc->button_handle, sc->button_type); 203 204 switch (sc->button_type) { 205 case ACPI_POWER_BUTTON: 206 ACPI_VPRINT(sc->button_dev, acpi_sc, "power button pressed\n"); 207 acpi_event_power_button_sleep(acpi_sc); 208 break; 209 case ACPI_SLEEP_BUTTON: 210 ACPI_VPRINT(sc->button_dev, acpi_sc, "sleep button pressed\n"); 211 acpi_event_sleep_button_sleep(acpi_sc); 212 break; 213 default: 214 break; /* unknown button type */ 215 } 216 } 217 218 static void 219 acpi_button_notify_wakeup(void *arg) 220 { 221 struct acpi_button_softc *sc; 222 struct acpi_softc *acpi_sc; 223 224 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 225 226 sc = (struct acpi_button_softc *)arg; 227 acpi_sc = acpi_device_get_parent_softc(sc->button_dev); 228 if (acpi_sc == NULL) 229 return_VOID; 230 231 acpi_UserNotify("Button", sc->button_handle, sc->button_type); 232 233 switch (sc->button_type) { 234 case ACPI_POWER_BUTTON: 235 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by power button\n"); 236 acpi_event_power_button_wake(acpi_sc); 237 break; 238 case ACPI_SLEEP_BUTTON: 239 ACPI_VPRINT(sc->button_dev, acpi_sc, "wakeup by sleep button\n"); 240 acpi_event_sleep_button_wake(acpi_sc); 241 break; 242 default: 243 break; /* unknown button type */ 244 } 245 } 246 247 static void 248 acpi_button_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 249 { 250 struct acpi_button_softc *sc; 251 252 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 253 254 sc = (struct acpi_button_softc *)context; 255 switch (notify) { 256 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP: 257 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_sleep, sc); 258 break; 259 case ACPI_NOTIFY_BUTTON_PRESSED_FOR_WAKEUP: 260 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_button_notify_wakeup, sc); 261 break; 262 default: 263 device_printf(sc->button_dev, "unknown notify %#x\n", notify); 264 break; 265 } 266 } 267 268 static ACPI_STATUS 269 acpi_button_fixed_handler(void *context) 270 { 271 struct acpi_button_softc *sc = (struct acpi_button_softc *)context; 272 273 ACPI_FUNCTION_TRACE_PTR((char *)(uintptr_t)__func__, context); 274 275 if (context == NULL) 276 return_ACPI_STATUS (AE_BAD_PARAMETER); 277 278 acpi_button_notify_handler(sc->button_handle, 279 ACPI_NOTIFY_BUTTON_PRESSED_FOR_SLEEP, sc); 280 return_ACPI_STATUS (AE_OK); 281 } 282