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, 2001 Michael Smith 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 * $FreeBSD$ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/ioccom.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 #include <sys/sbuf.h> 47 #include <sys/smp.h> 48 49 #include <machine/clock.h> 50 #include <machine/resource.h> 51 #include <machine/bus.h> 52 #include <sys/rman.h> 53 #include <isa/isavar.h> 54 55 #include "acpi.h" 56 #include <dev/acpica/acpivar.h> 57 #include <dev/acpica/acpiio.h> 58 #include <contrib/dev/acpica/acnamesp.h> 59 60 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 61 62 /* Hooks for the ACPI CA debugging infrastructure */ 63 #define _COMPONENT ACPI_BUS 64 ACPI_MODULE_NAME("ACPI") 65 66 static d_open_t acpiopen; 67 static d_close_t acpiclose; 68 static d_ioctl_t acpiioctl; 69 70 static struct cdevsw acpi_cdevsw = { 71 .d_version = D_VERSION, 72 .d_flags = D_NEEDGIANT, 73 .d_open = acpiopen, 74 .d_close = acpiclose, 75 .d_ioctl = acpiioctl, 76 .d_name = "acpi", 77 }; 78 79 static const char* sleep_state_names[] = { 80 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 81 82 /* this has to be static, as the softc is gone when we need it */ 83 static int acpi_off_state = ACPI_STATE_S5; 84 85 #if __FreeBSD_version >= 500000 86 struct mtx acpi_mutex; 87 #endif 88 89 struct acpi_quirks { 90 char *OemId; 91 uint32_t OemRevision; 92 char *value; 93 }; 94 95 #define ACPI_OEM_REV_ANY 0 96 97 static struct acpi_quirks acpi_quirks_table[] = { 98 #ifdef notyet 99 /* Bad PCI routing table. Used on some SuperMicro boards. */ 100 { "PTLTD ", 0x06040000, "pci_link" }, 101 #endif 102 103 { NULL, 0, NULL } 104 }; 105 106 static int acpi_modevent(struct module *mod, int event, void *junk); 107 static void acpi_identify(driver_t *driver, device_t parent); 108 static int acpi_probe(device_t dev); 109 static int acpi_attach(device_t dev); 110 static void acpi_quirks_set(void); 111 static device_t acpi_add_child(device_t bus, int order, const char *name, 112 int unit); 113 static int acpi_print_child(device_t bus, device_t child); 114 static int acpi_read_ivar(device_t dev, device_t child, int index, 115 uintptr_t *result); 116 static int acpi_write_ivar(device_t dev, device_t child, int index, 117 uintptr_t value); 118 static int acpi_set_resource(device_t dev, device_t child, int type, 119 int rid, u_long start, u_long count); 120 static int acpi_get_resource(device_t dev, device_t child, int type, 121 int rid, u_long *startp, u_long *countp); 122 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 123 int type, int *rid, u_long start, u_long end, 124 u_long count, u_int flags); 125 static int acpi_release_resource(device_t bus, device_t child, int type, 126 int rid, struct resource *r); 127 static uint32_t acpi_isa_get_logicalid(device_t dev); 128 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 129 static int acpi_isa_pnp_probe(device_t bus, device_t child, 130 struct isa_pnp_id *ids); 131 static void acpi_probe_children(device_t bus); 132 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 133 void *context, void **status); 134 static void acpi_shutdown_pre_sync(void *arg, int howto); 135 static void acpi_shutdown_final(void *arg, int howto); 136 static void acpi_shutdown_poweroff(void *arg); 137 static void acpi_enable_fixed_events(struct acpi_softc *sc); 138 static void acpi_system_eventhandler_sleep(void *arg, int state); 139 static void acpi_system_eventhandler_wakeup(void *arg, int state); 140 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 141 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 142 static int acpi_pm_func(u_long cmd, void *arg, ...); 143 144 static device_method_t acpi_methods[] = { 145 /* Device interface */ 146 DEVMETHOD(device_identify, acpi_identify), 147 DEVMETHOD(device_probe, acpi_probe), 148 DEVMETHOD(device_attach, acpi_attach), 149 DEVMETHOD(device_detach, bus_generic_detach), 150 DEVMETHOD(device_shutdown, bus_generic_shutdown), 151 DEVMETHOD(device_suspend, bus_generic_suspend), 152 DEVMETHOD(device_resume, bus_generic_resume), 153 154 /* Bus interface */ 155 DEVMETHOD(bus_add_child, acpi_add_child), 156 DEVMETHOD(bus_print_child, acpi_print_child), 157 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 158 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 159 DEVMETHOD(bus_set_resource, acpi_set_resource), 160 DEVMETHOD(bus_get_resource, acpi_get_resource), 161 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 162 DEVMETHOD(bus_release_resource, acpi_release_resource), 163 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 164 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 165 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 166 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 167 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 168 169 /* ISA emulation */ 170 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 171 172 {0, 0} 173 }; 174 175 static driver_t acpi_driver = { 176 "acpi", 177 acpi_methods, 178 sizeof(struct acpi_softc), 179 }; 180 181 static devclass_t acpi_devclass; 182 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 183 MODULE_VERSION(acpi, 100); 184 185 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 186 static char acpi_ca_version[12]; 187 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 188 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 189 190 /* 191 * Allow override of whether methods execute in parallel or not. 192 * Default to serial behavior as this fixes some AE_ALREADY_EXISTS errors 193 * and matches the MS interpreter. 194 */ 195 static int acpi_serialize_methods = 1; 196 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 197 198 /* Allow override of whether to support the _OSI method. */ 199 static int acpi_osi_method; 200 TUNABLE_INT("hw.acpi.osi_method", &acpi_osi_method); 201 202 /* 203 * ACPI can only be loaded as a module by the loader; activating it after 204 * system bootstrap time is not useful, and can be fatal to the system. 205 * It also cannot be unloaded, since the entire system bus heirarchy hangs 206 * off it. 207 */ 208 static int 209 acpi_modevent(struct module *mod, int event, void *junk) 210 { 211 switch(event) { 212 case MOD_LOAD: 213 if (!cold) { 214 printf("The ACPI driver cannot be loaded after boot.\n"); 215 return (EPERM); 216 } 217 break; 218 case MOD_UNLOAD: 219 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 220 return (EBUSY); 221 break; 222 default: 223 break; 224 } 225 return (0); 226 } 227 228 /* 229 * Perform early initialization. 230 */ 231 ACPI_STATUS 232 acpi_Startup(void) 233 { 234 #ifdef ACPI_DEBUGGER 235 char *debugpoint; 236 #endif 237 static int error, started = 0; 238 239 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 240 241 if (started) 242 return_VALUE (error); 243 started = 1; 244 245 #if __FreeBSD_version >= 500000 246 /* Initialise the ACPI mutex */ 247 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 248 #endif 249 250 /* 251 * Set the globals from our tunables. This is needed because ACPI-CA 252 * uses UINT8 for some values and we have no tunable_uint8. 253 */ 254 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 255 AcpiGbl_CreateOsiMethod = acpi_osi_method; 256 257 /* Start up the ACPI CA subsystem. */ 258 #ifdef ACPI_DEBUGGER 259 debugpoint = getenv("debug.acpi.debugger"); 260 if (debugpoint) { 261 if (!strcmp(debugpoint, "init")) 262 acpi_EnterDebugger(); 263 freeenv(debugpoint); 264 } 265 #endif 266 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 267 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 268 return_VALUE (error); 269 } 270 #ifdef ACPI_DEBUGGER 271 debugpoint = getenv("debug.acpi.debugger"); 272 if (debugpoint) { 273 if (!strcmp(debugpoint, "tables")) 274 acpi_EnterDebugger(); 275 freeenv(debugpoint); 276 } 277 #endif 278 279 if (ACPI_FAILURE(error = AcpiLoadTables())) { 280 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 281 return_VALUE(error); 282 } 283 284 /* Set up any quirks we have for this XSDT. */ 285 acpi_quirks_set(); 286 if (acpi_disabled("acpi")) 287 return_VALUE (AE_ERROR); 288 289 return_VALUE (AE_OK); 290 } 291 292 /* 293 * Detect ACPI, perform early initialisation 294 */ 295 static void 296 acpi_identify(driver_t *driver, device_t parent) 297 { 298 device_t child; 299 300 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 301 302 if (!cold) 303 return_VOID; 304 305 /* Check that we haven't been disabled with a hint. */ 306 if (resource_disabled("acpi", 0)) 307 return_VOID; 308 309 /* Make sure we're not being doubly invoked. */ 310 if (device_find_child(parent, "acpi", 0) != NULL) 311 return_VOID; 312 313 /* Initialize ACPI-CA. */ 314 if (ACPI_FAILURE(acpi_Startup())) 315 return_VOID; 316 317 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 318 319 /* Attach the actual ACPI device. */ 320 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 321 device_printf(parent, "ACPI: could not attach\n"); 322 return_VOID; 323 } 324 } 325 326 /* 327 * Fetch some descriptive data from ACPI to put in our attach message 328 */ 329 static int 330 acpi_probe(device_t dev) 331 { 332 ACPI_TABLE_HEADER th; 333 char buf[20]; 334 int error; 335 struct sbuf sb; 336 ACPI_STATUS status; 337 ACPI_LOCK_DECL; 338 339 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 340 341 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 342 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 343 344 device_printf(dev, "Other PM system enabled.\n"); 345 return_VALUE(ENXIO); 346 } 347 348 ACPI_LOCK; 349 350 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 351 device_printf(dev, "couldn't get XSDT header: %s\n", 352 AcpiFormatException(status)); 353 error = ENXIO; 354 } else { 355 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 356 sbuf_bcat(&sb, th.OemId, 6); 357 sbuf_trim(&sb); 358 sbuf_putc(&sb, ' '); 359 sbuf_bcat(&sb, th.OemTableId, 8); 360 sbuf_trim(&sb); 361 sbuf_finish(&sb); 362 device_set_desc_copy(dev, sbuf_data(&sb)); 363 sbuf_delete(&sb); 364 error = 0; 365 } 366 ACPI_UNLOCK; 367 return_VALUE(error); 368 } 369 370 static int 371 acpi_attach(device_t dev) 372 { 373 struct acpi_softc *sc; 374 ACPI_STATUS status; 375 int error; 376 UINT32 flags; 377 char *env; 378 #ifdef ACPI_DEBUGGER 379 char *debugpoint; 380 #endif 381 ACPI_LOCK_DECL; 382 383 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 384 ACPI_LOCK; 385 sc = device_get_softc(dev); 386 bzero(sc, sizeof(*sc)); 387 sc->acpi_dev = dev; 388 389 #ifdef ACPI_DEBUGGER 390 debugpoint = getenv("debug.acpi.debugger"); 391 if (debugpoint) { 392 if (!strcmp(debugpoint, "spaces")) 393 acpi_EnterDebugger(); 394 freeenv(debugpoint); 395 } 396 #endif 397 398 /* Install the default address space handlers. */ 399 error = ENXIO; 400 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 401 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 402 if (ACPI_FAILURE(status)) { 403 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 404 AcpiFormatException(status)); 405 goto out; 406 } 407 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 408 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 409 if (ACPI_FAILURE(status)) { 410 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 411 AcpiFormatException(status)); 412 goto out; 413 } 414 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 415 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 416 if (ACPI_FAILURE(status)) { 417 device_printf(dev, "could not initialise PciConfig handler: %s\n", 418 AcpiFormatException(status)); 419 goto out; 420 } 421 422 /* 423 * Bring ACPI fully online. 424 * 425 * Note that some systems (specifically, those with namespace evaluation 426 * issues that require the avoidance of parts of the namespace) must 427 * avoid running _INI and _STA on everything, as well as dodging the final 428 * object init pass. 429 * 430 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 431 * 432 * XXX We should arrange for the object init pass after we have attached 433 * all our child devices, but on many systems it works here. 434 */ 435 #ifdef ACPI_DEBUGGER 436 debugpoint = getenv("debug.acpi.debugger"); 437 if (debugpoint) { 438 if (!strcmp(debugpoint, "enable")) 439 acpi_EnterDebugger(); 440 freeenv(debugpoint); 441 } 442 #endif 443 flags = 0; 444 if (testenv("debug.acpi.avoid")) 445 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 446 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 447 device_printf(dev, "Could not enable ACPI: %s\n", 448 AcpiFormatException(status)); 449 goto out; 450 } 451 452 /* 453 * Call the ECDT probe function to provide EC functionality before 454 * the namespace has been evaluated. 455 */ 456 acpi_ec_ecdt_probe(dev); 457 458 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 459 device_printf(dev, "Could not initialize ACPI objects: %s\n", 460 AcpiFormatException(status)); 461 goto out; 462 } 463 464 /* 465 * Setup our sysctl tree. 466 * 467 * XXX: This doesn't check to make sure that none of these fail. 468 */ 469 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 470 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 471 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 472 device_get_name(dev), CTLFLAG_RD, 0, ""); 473 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 474 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 475 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 476 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 477 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 478 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 479 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 480 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 481 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 482 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 483 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 484 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 485 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 486 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 487 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 488 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 489 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 490 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 491 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 492 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 493 &sc->acpi_sleep_delay, 0, "sleep delay"); 494 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 495 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 496 &sc->acpi_s4bios, 0, "S4BIOS mode"); 497 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 498 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 499 &sc->acpi_verbose, 0, "verbose mode"); 500 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 501 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 502 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 503 504 /* 505 * Default to 5 seconds before sleeping to give some machines time to 506 * stabilize. 507 */ 508 sc->acpi_sleep_delay = 5; 509 sc->acpi_disable_on_poweroff = 1; 510 if (bootverbose) 511 sc->acpi_verbose = 1; 512 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 513 sc->acpi_verbose = 1; 514 freeenv(env); 515 } 516 517 /* Only enable S4BIOS by default if the FACS says it is available. */ 518 if (AcpiGbl_FACS->S4Bios_f != 0) 519 sc->acpi_s4bios = 1; 520 521 /* 522 * Dispatch the default sleep state to devices. 523 * TBD: should be configured from userland policy manager. 524 */ 525 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 526 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 527 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 528 sc->acpi_standby_sx = ACPI_STATE_S1; 529 sc->acpi_suspend_sx = ACPI_STATE_S3; 530 531 acpi_enable_fixed_events(sc); 532 533 /* 534 * Scan the namespace and attach/initialise children. 535 */ 536 #ifdef ACPI_DEBUGGER 537 debugpoint = getenv("debug.acpi.debugger"); 538 if (debugpoint) { 539 if (!strcmp(debugpoint, "probe")) 540 acpi_EnterDebugger(); 541 freeenv(debugpoint); 542 } 543 #endif 544 545 /* Register our shutdown handlers */ 546 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 547 SHUTDOWN_PRI_LAST); 548 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 549 SHUTDOWN_PRI_LAST); 550 551 /* 552 * Register our acpi event handlers. 553 * XXX should be configurable eg. via userland policy manager. 554 */ 555 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 556 sc, ACPI_EVENT_PRI_LAST); 557 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 558 sc, ACPI_EVENT_PRI_LAST); 559 560 /* Flag our initial states. */ 561 sc->acpi_enabled = 1; 562 sc->acpi_sstate = ACPI_STATE_S0; 563 sc->acpi_sleep_disabled = 0; 564 565 /* Create the control device */ 566 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 567 "acpi"); 568 sc->acpi_dev_t->si_drv1 = sc; 569 570 #ifdef ACPI_DEBUGGER 571 debugpoint = getenv("debug.acpi.debugger"); 572 if (debugpoint) { 573 if (strcmp(debugpoint, "running") == 0) 574 acpi_EnterDebugger(); 575 freeenv(debugpoint); 576 } 577 #endif 578 579 #ifdef ACPI_USE_THREADS 580 if ((error = acpi_task_thread_init())) 581 goto out; 582 #endif 583 584 if ((error = acpi_machdep_init(dev))) 585 goto out; 586 587 /* Register ACPI again to pass the correct argument of pm_func. */ 588 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 589 590 if (!acpi_disabled("bus")) 591 acpi_probe_children(dev); 592 593 error = 0; 594 595 out: 596 ACPI_UNLOCK; 597 return_VALUE (error); 598 } 599 600 static void 601 acpi_quirks_set() 602 { 603 XSDT_DESCRIPTOR *xsdt; 604 struct acpi_quirks *quirk; 605 char *env, *tmp; 606 int len; 607 608 /* 609 * If the user loaded a custom table or disabled "quirks", leave 610 * the settings alone. 611 */ 612 len = 0; 613 if ((env = getenv("acpi_dsdt_load")) != NULL) { 614 /* XXX No strcasecmp but this is good enough. */ 615 if (*env == 'Y' || *env == 'y') 616 goto out; 617 freeenv(env); 618 } 619 if ((env = getenv("debug.acpi.disabled")) != NULL) { 620 if (strstr("quirks", env) != NULL) 621 goto out; 622 len = strlen(env); 623 } 624 625 /* 626 * Search through our quirk table and concatenate the disabled 627 * values with whatever we find. 628 */ 629 xsdt = AcpiGbl_XSDT; 630 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) { 631 if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) && 632 (xsdt->OemRevision == quirk->OemRevision || 633 quirk->OemRevision == ACPI_OEM_REV_ANY)) { 634 len += strlen(quirk->value) + 2; 635 if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL) 636 goto out; 637 sprintf(tmp, "%s %s", env ? env : "", quirk->value); 638 setenv("debug.acpi.disabled", tmp); 639 free(tmp, M_TEMP); 640 break; 641 } 642 } 643 644 out: 645 if (env) 646 freeenv(env); 647 } 648 649 /* 650 * Handle a new device being added 651 */ 652 static device_t 653 acpi_add_child(device_t bus, int order, const char *name, int unit) 654 { 655 struct acpi_device *ad; 656 device_t child; 657 658 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 659 return (NULL); 660 661 resource_list_init(&ad->ad_rl); 662 663 child = device_add_child_ordered(bus, order, name, unit); 664 if (child != NULL) 665 device_set_ivars(child, ad); 666 return (child); 667 } 668 669 static int 670 acpi_print_child(device_t bus, device_t child) 671 { 672 struct acpi_device *adev = device_get_ivars(child); 673 struct resource_list *rl = &adev->ad_rl; 674 int retval = 0; 675 676 retval += bus_print_child_header(bus, child); 677 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 678 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 679 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 680 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 681 retval += bus_print_child_footer(bus, child); 682 683 return (retval); 684 } 685 686 /* 687 * Handle per-device ivars 688 */ 689 static int 690 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 691 { 692 struct acpi_device *ad; 693 694 if ((ad = device_get_ivars(child)) == NULL) { 695 printf("device has no ivars\n"); 696 return (ENOENT); 697 } 698 699 /* ACPI and ISA compatibility ivars */ 700 switch(index) { 701 case ACPI_IVAR_HANDLE: 702 *(ACPI_HANDLE *)result = ad->ad_handle; 703 break; 704 case ACPI_IVAR_MAGIC: 705 *(int *)result = ad->ad_magic; 706 break; 707 case ACPI_IVAR_PRIVATE: 708 *(void **)result = ad->ad_private; 709 break; 710 case ISA_IVAR_VENDORID: 711 case ISA_IVAR_SERIAL: 712 case ISA_IVAR_COMPATID: 713 *(int *)result = -1; 714 break; 715 case ISA_IVAR_LOGICALID: 716 *(int *)result = acpi_isa_get_logicalid(child); 717 break; 718 default: 719 return (ENOENT); 720 } 721 722 return (0); 723 } 724 725 static int 726 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 727 { 728 struct acpi_device *ad; 729 730 if ((ad = device_get_ivars(child)) == NULL) { 731 printf("device has no ivars\n"); 732 return (ENOENT); 733 } 734 735 switch(index) { 736 case ACPI_IVAR_HANDLE: 737 ad->ad_handle = (ACPI_HANDLE)value; 738 break; 739 case ACPI_IVAR_MAGIC: 740 ad->ad_magic = (int)value; 741 break; 742 case ACPI_IVAR_PRIVATE: 743 ad->ad_private = (void *)value; 744 break; 745 default: 746 panic("bad ivar write request (%d)", index); 747 return (ENOENT); 748 } 749 750 return (0); 751 } 752 753 ACPI_HANDLE 754 acpi_get_handle(device_t dev) 755 { 756 uintptr_t up; 757 ACPI_HANDLE h; 758 759 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, &up)) 760 return(NULL); 761 h = (ACPI_HANDLE)up; 762 return (h); 763 } 764 765 int 766 acpi_set_handle(device_t dev, ACPI_HANDLE h) 767 { 768 uintptr_t up; 769 770 up = (uintptr_t)h; 771 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, up)); 772 } 773 774 int 775 acpi_get_magic(device_t dev) 776 { 777 uintptr_t up; 778 int m; 779 780 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, &up)) 781 return(0); 782 m = (int)up; 783 return (m); 784 } 785 786 int 787 acpi_set_magic(device_t dev, int m) 788 { 789 uintptr_t up; 790 791 up = (uintptr_t)m; 792 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, up)); 793 } 794 795 void * 796 acpi_get_private(device_t dev) 797 { 798 uintptr_t up; 799 void *p; 800 801 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, &up)) 802 return (NULL); 803 p = (void *)up; 804 return (p); 805 } 806 807 int 808 acpi_set_private(device_t dev, void *p) 809 { 810 uintptr_t up; 811 812 up = (uintptr_t)p; 813 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, up)); 814 } 815 816 ACPI_OBJECT_TYPE 817 acpi_get_type(device_t dev) 818 { 819 ACPI_HANDLE h; 820 ACPI_OBJECT_TYPE t; 821 822 if ((h = acpi_get_handle(dev)) == NULL) 823 return (ACPI_TYPE_NOT_FOUND); 824 if (AcpiGetType(h, &t) != AE_OK) 825 return (ACPI_TYPE_NOT_FOUND); 826 return (t); 827 } 828 829 /* 830 * Handle child resource allocation/removal 831 */ 832 static int 833 acpi_set_resource(device_t dev, device_t child, int type, int rid, 834 u_long start, u_long count) 835 { 836 struct acpi_device *ad = device_get_ivars(child); 837 struct resource_list *rl = &ad->ad_rl; 838 839 resource_list_add(rl, type, rid, start, start + count -1, count); 840 841 return(0); 842 } 843 844 static int 845 acpi_get_resource(device_t dev, device_t child, int type, int rid, 846 u_long *startp, u_long *countp) 847 { 848 struct acpi_device *ad = device_get_ivars(child); 849 struct resource_list *rl = &ad->ad_rl; 850 struct resource_list_entry *rle; 851 852 rle = resource_list_find(rl, type, rid); 853 if (!rle) 854 return(ENOENT); 855 856 if (startp) 857 *startp = rle->start; 858 if (countp) 859 *countp = rle->count; 860 861 return (0); 862 } 863 864 static struct resource * 865 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 866 u_long start, u_long end, u_long count, u_int flags) 867 { 868 struct acpi_device *ad = device_get_ivars(child); 869 struct resource_list *rl = &ad->ad_rl; 870 871 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 872 flags)); 873 } 874 875 static int 876 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 877 { 878 struct acpi_device *ad = device_get_ivars(child); 879 struct resource_list *rl = &ad->ad_rl; 880 881 return (resource_list_release(rl, bus, child, type, rid, r)); 882 } 883 884 /* Allocate an IO port or memory resource, given its GAS. */ 885 struct resource * 886 acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 887 { 888 int type; 889 890 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 891 gas->RegisterBitWidth < 8) 892 return (NULL); 893 894 switch (gas->AddressSpaceId) { 895 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 896 type = SYS_RES_MEMORY; 897 break; 898 case ACPI_ADR_SPACE_SYSTEM_IO: 899 type = SYS_RES_IOPORT; 900 break; 901 default: 902 return (NULL); 903 } 904 905 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 906 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE)); 907 } 908 909 /* 910 * Handle ISA-like devices probing for a PnP ID to match. 911 */ 912 #define PNP_EISAID(s) \ 913 ((((s[0] - '@') & 0x1f) << 2) \ 914 | (((s[1] - '@') & 0x18) >> 3) \ 915 | (((s[1] - '@') & 0x07) << 13) \ 916 | (((s[2] - '@') & 0x1f) << 8) \ 917 | (PNP_HEXTONUM(s[4]) << 16) \ 918 | (PNP_HEXTONUM(s[3]) << 20) \ 919 | (PNP_HEXTONUM(s[6]) << 24) \ 920 | (PNP_HEXTONUM(s[5]) << 28)) 921 922 static uint32_t 923 acpi_isa_get_logicalid(device_t dev) 924 { 925 ACPI_DEVICE_INFO *devinfo; 926 ACPI_BUFFER buf; 927 ACPI_HANDLE h; 928 ACPI_STATUS error; 929 u_int32_t pnpid; 930 ACPI_LOCK_DECL; 931 932 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 933 934 pnpid = 0; 935 buf.Pointer = NULL; 936 buf.Length = ACPI_ALLOCATE_BUFFER; 937 938 ACPI_LOCK; 939 940 /* Fetch and validate the HID. */ 941 if ((h = acpi_get_handle(dev)) == NULL) 942 goto out; 943 error = AcpiGetObjectInfo(h, &buf); 944 if (ACPI_FAILURE(error)) 945 goto out; 946 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 947 948 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 949 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 950 951 out: 952 if (buf.Pointer != NULL) 953 AcpiOsFree(buf.Pointer); 954 ACPI_UNLOCK; 955 return_VALUE (pnpid); 956 } 957 958 static int 959 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 960 { 961 ACPI_DEVICE_INFO *devinfo; 962 ACPI_BUFFER buf; 963 ACPI_HANDLE h; 964 ACPI_STATUS error; 965 uint32_t *pnpid; 966 int valid, i; 967 ACPI_LOCK_DECL; 968 969 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 970 971 pnpid = cids; 972 valid = 0; 973 buf.Pointer = NULL; 974 buf.Length = ACPI_ALLOCATE_BUFFER; 975 976 ACPI_LOCK; 977 978 /* Fetch and validate the CID */ 979 if ((h = acpi_get_handle(dev)) == NULL) 980 goto out; 981 error = AcpiGetObjectInfo(h, &buf); 982 if (ACPI_FAILURE(error)) 983 goto out; 984 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 985 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 986 goto out; 987 988 if (devinfo->CompatibilityId.Count < count) 989 count = devinfo->CompatibilityId.Count; 990 for (i = 0; i < count; i++) { 991 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 992 continue; 993 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 994 valid++; 995 } 996 997 out: 998 if (buf.Pointer != NULL) 999 AcpiOsFree(buf.Pointer); 1000 ACPI_UNLOCK; 1001 return_VALUE (valid); 1002 } 1003 1004 static int 1005 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1006 { 1007 int result, cid_count, i; 1008 uint32_t lid, cids[8]; 1009 1010 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1011 1012 /* 1013 * ISA-style drivers attached to ACPI may persist and 1014 * probe manually if we return ENOENT. We never want 1015 * that to happen, so don't ever return it. 1016 */ 1017 result = ENXIO; 1018 1019 /* Scan the supplied IDs for a match */ 1020 lid = acpi_isa_get_logicalid(child); 1021 cid_count = acpi_isa_get_compatid(child, cids, 8); 1022 while (ids && ids->ip_id) { 1023 if (lid == ids->ip_id) { 1024 result = 0; 1025 goto out; 1026 } 1027 for (i = 0; i < cid_count; i++) { 1028 if (cids[i] == ids->ip_id) { 1029 result = 0; 1030 goto out; 1031 } 1032 } 1033 ids++; 1034 } 1035 1036 out: 1037 return_VALUE (result); 1038 } 1039 1040 /* 1041 * Scan relevant portions of the ACPI namespace and attach child devices. 1042 * 1043 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1044 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1045 */ 1046 static void 1047 acpi_probe_children(device_t bus) 1048 { 1049 ACPI_HANDLE parent; 1050 ACPI_STATUS status; 1051 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1052 int i; 1053 1054 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1055 ACPI_ASSERTLOCK; 1056 1057 /* Create any static children by calling device identify methods. */ 1058 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1059 bus_generic_probe(bus); 1060 1061 /* 1062 * Scan the namespace and insert placeholders for all the devices that 1063 * we find. 1064 * 1065 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1066 * we want to create nodes for all devices, not just those that are 1067 * currently present. (This assumes that we don't want to create/remove 1068 * devices as they appear, which might be smarter.) 1069 */ 1070 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1071 for (i = 0; scopes[i] != NULL; i++) { 1072 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1073 if (ACPI_SUCCESS(status)) { 1074 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1075 bus, NULL); 1076 } 1077 } 1078 1079 /* 1080 * Scan all of the child devices we have created and let them probe/attach. 1081 */ 1082 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1083 bus_generic_attach(bus); 1084 1085 /* 1086 * Some of these children may have attached others as part of their attach 1087 * process (eg. the root PCI bus driver), so rescan. 1088 */ 1089 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1090 bus_generic_attach(bus); 1091 1092 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1093 return_VOID; 1094 } 1095 1096 /* 1097 * Evaluate a child device and determine whether we might attach a device to 1098 * it. 1099 */ 1100 static ACPI_STATUS 1101 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1102 { 1103 ACPI_OBJECT_TYPE type; 1104 device_t child, bus = (device_t)context; 1105 1106 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1107 1108 /* Skip this device if we think we'll have trouble with it. */ 1109 if (acpi_avoid(handle)) 1110 return_ACPI_STATUS (AE_OK); 1111 1112 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1113 switch(type) { 1114 case ACPI_TYPE_DEVICE: 1115 case ACPI_TYPE_PROCESSOR: 1116 case ACPI_TYPE_THERMAL: 1117 case ACPI_TYPE_POWER: 1118 if (acpi_disabled("children")) 1119 break; 1120 1121 /* 1122 * Create a placeholder device for this node. Sort the placeholder 1123 * so that the probe/attach passes will run breadth-first. 1124 */ 1125 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1126 acpi_name(handle))); 1127 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 1128 if (child == NULL) 1129 break; 1130 acpi_set_handle(child, handle); 1131 1132 /* 1133 * Check that the device is present. If it's not present, 1134 * leave it disabled (so that we have a device_t attached to 1135 * the handle, but we don't probe it). 1136 */ 1137 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1138 device_disable(child); 1139 break; 1140 } 1141 1142 /* 1143 * Get the device's resource settings and attach them. 1144 * Note that if the device has _PRS but no _CRS, we need 1145 * to decide when it's appropriate to try to configure the 1146 * device. Ignore the return value here; it's OK for the 1147 * device not to have any resources. 1148 */ 1149 acpi_parse_resources(child, handle, &acpi_res_parse_set); 1150 1151 /* If we're debugging, probe/attach now rather than later */ 1152 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 1153 break; 1154 } 1155 } 1156 1157 return_ACPI_STATUS (AE_OK); 1158 } 1159 1160 static void 1161 acpi_shutdown_pre_sync(void *arg, int howto) 1162 { 1163 struct acpi_softc *sc = arg; 1164 1165 ACPI_ASSERTLOCK; 1166 1167 /* 1168 * Disable all ACPI events before soft off, otherwise the system 1169 * will be turned on again on some laptops. 1170 * 1171 * XXX this should probably be restricted to masking some events just 1172 * before powering down, since we may still need ACPI during the 1173 * shutdown process. 1174 */ 1175 if (sc->acpi_disable_on_poweroff) 1176 acpi_Disable(sc); 1177 } 1178 1179 static void 1180 acpi_shutdown_final(void *arg, int howto) 1181 { 1182 1183 ACPI_ASSERTLOCK; 1184 1185 /* 1186 * If powering off, run the actual shutdown code on each processor. 1187 * It will only perform the shutdown on the BSP. Some chipsets do 1188 * not power off the system correctly if called from an AP. 1189 */ 1190 if ((howto & RB_POWEROFF) != 0) { 1191 printf("Powering system off using ACPI\n"); 1192 smp_rendezvous(NULL, acpi_shutdown_poweroff, NULL, NULL); 1193 } else { 1194 printf("Shutting down ACPI\n"); 1195 AcpiTerminate(); 1196 } 1197 } 1198 1199 static void 1200 acpi_shutdown_poweroff(void *arg) 1201 { 1202 ACPI_STATUS status; 1203 1204 ACPI_ASSERTLOCK; 1205 1206 /* Only attempt to power off if this is the BSP (cpuid 0). */ 1207 if (PCPU_GET(cpuid) != 0) 1208 return; 1209 1210 status = AcpiEnterSleepStatePrep(acpi_off_state); 1211 if (ACPI_FAILURE(status)) { 1212 printf("AcpiEnterSleepStatePrep failed - %s\n", 1213 AcpiFormatException(status)); 1214 return; 1215 } 1216 ACPI_DISABLE_IRQS(); 1217 status = AcpiEnterSleepState(acpi_off_state); 1218 if (ACPI_FAILURE(status)) { 1219 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1220 } else { 1221 DELAY(1000000); 1222 printf("ACPI power-off failed - timeout\n"); 1223 } 1224 } 1225 1226 static void 1227 acpi_enable_fixed_events(struct acpi_softc *sc) 1228 { 1229 static int first_time = 1; 1230 1231 ACPI_ASSERTLOCK; 1232 1233 /* Enable and clear fixed events and install handlers. */ 1234 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1235 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1236 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1237 acpi_event_power_button_sleep, sc); 1238 if (first_time) 1239 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1240 } 1241 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1242 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1243 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1244 acpi_event_sleep_button_sleep, sc); 1245 if (first_time) 1246 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1247 } 1248 1249 first_time = 0; 1250 } 1251 1252 /* 1253 * Returns true if the device is actually present and should 1254 * be attached to. This requires the present, enabled, UI-visible 1255 * and diagnostics-passed bits to be set. 1256 */ 1257 BOOLEAN 1258 acpi_DeviceIsPresent(device_t dev) 1259 { 1260 ACPI_DEVICE_INFO *devinfo; 1261 ACPI_HANDLE h; 1262 ACPI_BUFFER buf; 1263 ACPI_STATUS error; 1264 int ret; 1265 1266 ACPI_ASSERTLOCK; 1267 1268 ret = FALSE; 1269 if ((h = acpi_get_handle(dev)) == NULL) 1270 return (FALSE); 1271 buf.Pointer = NULL; 1272 buf.Length = ACPI_ALLOCATE_BUFFER; 1273 error = AcpiGetObjectInfo(h, &buf); 1274 if (ACPI_FAILURE(error)) 1275 return (FALSE); 1276 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1277 1278 /* If no _STA method, must be present */ 1279 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1280 ret = TRUE; 1281 1282 /* Return true for 'present' and 'functioning' */ 1283 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1284 ret = TRUE; 1285 1286 AcpiOsFree(buf.Pointer); 1287 return (ret); 1288 } 1289 1290 /* 1291 * Returns true if the battery is actually present and inserted. 1292 */ 1293 BOOLEAN 1294 acpi_BatteryIsPresent(device_t dev) 1295 { 1296 ACPI_DEVICE_INFO *devinfo; 1297 ACPI_HANDLE h; 1298 ACPI_BUFFER buf; 1299 ACPI_STATUS error; 1300 int ret; 1301 1302 ACPI_ASSERTLOCK; 1303 1304 ret = FALSE; 1305 if ((h = acpi_get_handle(dev)) == NULL) 1306 return (FALSE); 1307 buf.Pointer = NULL; 1308 buf.Length = ACPI_ALLOCATE_BUFFER; 1309 error = AcpiGetObjectInfo(h, &buf); 1310 if (ACPI_FAILURE(error)) 1311 return (FALSE); 1312 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1313 1314 /* If no _STA method, must be present */ 1315 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1316 ret = TRUE; 1317 1318 /* Return true for 'present' and 'functioning' */ 1319 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1320 ret = TRUE; 1321 1322 AcpiOsFree(buf.Pointer); 1323 return (ret); 1324 } 1325 1326 /* 1327 * Match a HID string against a device 1328 */ 1329 BOOLEAN 1330 acpi_MatchHid(device_t dev, char *hid) 1331 { 1332 ACPI_DEVICE_INFO *devinfo; 1333 ACPI_HANDLE h; 1334 ACPI_BUFFER buf; 1335 ACPI_STATUS error; 1336 int ret, i; 1337 1338 ACPI_ASSERTLOCK; 1339 1340 ret = FALSE; 1341 if (hid == NULL) 1342 return (FALSE); 1343 if ((h = acpi_get_handle(dev)) == NULL) 1344 return (FALSE); 1345 buf.Pointer = NULL; 1346 buf.Length = ACPI_ALLOCATE_BUFFER; 1347 error = AcpiGetObjectInfo(h, &buf); 1348 if (ACPI_FAILURE(error)) 1349 return (FALSE); 1350 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1351 1352 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1353 strcmp(hid, devinfo->HardwareId.Value) == 0) 1354 ret = TRUE; 1355 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1356 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1357 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1358 ret = TRUE; 1359 break; 1360 } 1361 } 1362 } 1363 1364 AcpiOsFree(buf.Pointer); 1365 return (ret); 1366 } 1367 1368 /* 1369 * Return the handle of a named object within our scope, ie. that of (parent) 1370 * or one if its parents. 1371 */ 1372 ACPI_STATUS 1373 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1374 { 1375 ACPI_HANDLE r; 1376 ACPI_STATUS status; 1377 1378 ACPI_ASSERTLOCK; 1379 1380 /* Walk back up the tree to the root */ 1381 for (;;) { 1382 status = AcpiGetHandle(parent, path, &r); 1383 if (ACPI_SUCCESS(status)) { 1384 *result = r; 1385 return (AE_OK); 1386 } 1387 if (status != AE_NOT_FOUND) 1388 return (AE_OK); 1389 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1390 return (AE_NOT_FOUND); 1391 parent = r; 1392 } 1393 } 1394 1395 /* 1396 * Allocate a buffer with a preset data size. 1397 */ 1398 ACPI_BUFFER * 1399 acpi_AllocBuffer(int size) 1400 { 1401 ACPI_BUFFER *buf; 1402 1403 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1404 return (NULL); 1405 buf->Length = size; 1406 buf->Pointer = (void *)(buf + 1); 1407 return (buf); 1408 } 1409 1410 ACPI_STATUS 1411 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1412 { 1413 ACPI_OBJECT arg1; 1414 ACPI_OBJECT_LIST args; 1415 1416 ACPI_ASSERTLOCK; 1417 1418 arg1.Type = ACPI_TYPE_INTEGER; 1419 arg1.Integer.Value = number; 1420 args.Count = 1; 1421 args.Pointer = &arg1; 1422 1423 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1424 } 1425 1426 /* 1427 * Evaluate a path that should return an integer. 1428 */ 1429 ACPI_STATUS 1430 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1431 { 1432 ACPI_STATUS status; 1433 ACPI_BUFFER buf; 1434 ACPI_OBJECT param; 1435 1436 ACPI_ASSERTLOCK; 1437 1438 if (handle == NULL) 1439 handle = ACPI_ROOT_OBJECT; 1440 1441 /* 1442 * Assume that what we've been pointed at is an Integer object, or 1443 * a method that will return an Integer. 1444 */ 1445 buf.Pointer = ¶m; 1446 buf.Length = sizeof(param); 1447 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1448 if (ACPI_SUCCESS(status)) { 1449 if (param.Type == ACPI_TYPE_INTEGER) 1450 *number = param.Integer.Value; 1451 else 1452 status = AE_TYPE; 1453 } 1454 1455 /* 1456 * In some applications, a method that's expected to return an Integer 1457 * may instead return a Buffer (probably to simplify some internal 1458 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1459 * convert it into an Integer as best we can. 1460 * 1461 * This is a hack. 1462 */ 1463 if (status == AE_BUFFER_OVERFLOW) { 1464 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1465 status = AE_NO_MEMORY; 1466 } else { 1467 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1468 if (ACPI_SUCCESS(status)) 1469 status = acpi_ConvertBufferToInteger(&buf, number); 1470 AcpiOsFree(buf.Pointer); 1471 } 1472 } 1473 return (status); 1474 } 1475 1476 ACPI_STATUS 1477 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1478 { 1479 ACPI_OBJECT *p; 1480 UINT8 *val; 1481 int i; 1482 1483 p = (ACPI_OBJECT *)bufp->Pointer; 1484 if (p->Type == ACPI_TYPE_INTEGER) { 1485 *number = p->Integer.Value; 1486 return (AE_OK); 1487 } 1488 if (p->Type != ACPI_TYPE_BUFFER) 1489 return (AE_TYPE); 1490 if (p->Buffer.Length > sizeof(int)) 1491 return (AE_BAD_DATA); 1492 1493 *number = 0; 1494 val = p->Buffer.Pointer; 1495 for (i = 0; i < p->Buffer.Length; i++) 1496 *number += val[i] << (i * 8); 1497 return (AE_OK); 1498 } 1499 1500 /* 1501 * Iterate over the elements of an a package object, calling the supplied 1502 * function for each element. 1503 * 1504 * XXX possible enhancement might be to abort traversal on error. 1505 */ 1506 ACPI_STATUS 1507 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1508 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1509 { 1510 ACPI_OBJECT *comp; 1511 int i; 1512 1513 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1514 return (AE_BAD_PARAMETER); 1515 1516 /* Iterate over components */ 1517 i = 0; 1518 comp = pkg->Package.Elements; 1519 for (; i < pkg->Package.Count; i++, comp++) 1520 func(comp, arg); 1521 1522 return (AE_OK); 1523 } 1524 1525 /* 1526 * Find the (index)th resource object in a set. 1527 */ 1528 ACPI_STATUS 1529 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1530 { 1531 ACPI_RESOURCE *rp; 1532 int i; 1533 1534 rp = (ACPI_RESOURCE *)buf->Pointer; 1535 i = index; 1536 while (i-- > 0) { 1537 /* Range check */ 1538 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1539 return (AE_BAD_PARAMETER); 1540 1541 /* Check for terminator */ 1542 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1543 return (AE_NOT_FOUND); 1544 rp = ACPI_NEXT_RESOURCE(rp); 1545 } 1546 if (resp != NULL) 1547 *resp = rp; 1548 1549 return (AE_OK); 1550 } 1551 1552 /* 1553 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1554 * 1555 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1556 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1557 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1558 * resources. 1559 */ 1560 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1561 1562 ACPI_STATUS 1563 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1564 { 1565 ACPI_RESOURCE *rp; 1566 void *newp; 1567 1568 /* Initialise the buffer if necessary. */ 1569 if (buf->Pointer == NULL) { 1570 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1571 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1572 return (AE_NO_MEMORY); 1573 rp = (ACPI_RESOURCE *)buf->Pointer; 1574 rp->Id = ACPI_RSTYPE_END_TAG; 1575 rp->Length = 0; 1576 } 1577 if (res == NULL) 1578 return (AE_OK); 1579 1580 /* 1581 * Scan the current buffer looking for the terminator. 1582 * This will either find the terminator or hit the end 1583 * of the buffer and return an error. 1584 */ 1585 rp = (ACPI_RESOURCE *)buf->Pointer; 1586 for (;;) { 1587 /* Range check, don't go outside the buffer */ 1588 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1589 return (AE_BAD_PARAMETER); 1590 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1591 break; 1592 rp = ACPI_NEXT_RESOURCE(rp); 1593 } 1594 1595 /* 1596 * Check the size of the buffer and expand if required. 1597 * 1598 * Required size is: 1599 * size of existing resources before terminator + 1600 * size of new resource and header + 1601 * size of terminator. 1602 * 1603 * Note that this loop should really only run once, unless 1604 * for some reason we are stuffing a *really* huge resource. 1605 */ 1606 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1607 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1608 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1609 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1610 return (AE_NO_MEMORY); 1611 bcopy(buf->Pointer, newp, buf->Length); 1612 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1613 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1614 AcpiOsFree(buf->Pointer); 1615 buf->Pointer = newp; 1616 buf->Length += buf->Length; 1617 } 1618 1619 /* Insert the new resource. */ 1620 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1621 1622 /* And add the terminator. */ 1623 rp = ACPI_NEXT_RESOURCE(rp); 1624 rp->Id = ACPI_RSTYPE_END_TAG; 1625 rp->Length = 0; 1626 1627 return (AE_OK); 1628 } 1629 1630 /* 1631 * Set interrupt model. 1632 */ 1633 ACPI_STATUS 1634 acpi_SetIntrModel(int model) 1635 { 1636 1637 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1638 } 1639 1640 #define ACPI_MINIMUM_AWAKETIME 5 1641 1642 static void 1643 acpi_sleep_enable(void *arg) 1644 { 1645 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1646 } 1647 1648 /* 1649 * Set the system sleep state 1650 * 1651 * Currently we support S1-S5 but S4 is only S4BIOS 1652 */ 1653 ACPI_STATUS 1654 acpi_SetSleepState(struct acpi_softc *sc, int state) 1655 { 1656 ACPI_STATUS status = AE_OK; 1657 UINT8 TypeA; 1658 UINT8 TypeB; 1659 1660 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1661 ACPI_ASSERTLOCK; 1662 1663 /* Avoid reentry if already attempting to suspend. */ 1664 if (sc->acpi_sstate != ACPI_STATE_S0) 1665 return_ACPI_STATUS (AE_BAD_PARAMETER); 1666 1667 /* We recently woke up so don't suspend again for a while. */ 1668 if (sc->acpi_sleep_disabled) 1669 return_ACPI_STATUS (AE_OK); 1670 1671 switch (state) { 1672 case ACPI_STATE_S1: 1673 case ACPI_STATE_S2: 1674 case ACPI_STATE_S3: 1675 case ACPI_STATE_S4: 1676 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1677 if (status == AE_NOT_FOUND) { 1678 device_printf(sc->acpi_dev, 1679 "Sleep state S%d not supported by BIOS\n", state); 1680 break; 1681 } else if (ACPI_FAILURE(status)) { 1682 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1683 AcpiFormatException(status)); 1684 break; 1685 } 1686 1687 sc->acpi_sstate = state; 1688 sc->acpi_sleep_disabled = 1; 1689 1690 /* Inform all devices that we are going to sleep. */ 1691 if (DEVICE_SUSPEND(root_bus) != 0) { 1692 /* 1693 * Re-wake the system. 1694 * 1695 * XXX note that a better two-pass approach with a 'veto' pass 1696 * followed by a "real thing" pass would be better, but the 1697 * current bus interface does not provide for this. 1698 */ 1699 DEVICE_RESUME(root_bus); 1700 return_ACPI_STATUS (AE_ERROR); 1701 } 1702 1703 status = AcpiEnterSleepStatePrep(state); 1704 if (ACPI_FAILURE(status)) { 1705 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1706 AcpiFormatException(status)); 1707 break; 1708 } 1709 1710 if (sc->acpi_sleep_delay > 0) 1711 DELAY(sc->acpi_sleep_delay * 1000000); 1712 1713 if (state != ACPI_STATE_S1) { 1714 acpi_sleep_machdep(sc, state); 1715 1716 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1717 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1718 ACPI_MUTEX_NOT_ACQUIRED) { 1719 1720 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1721 } 1722 1723 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1724 if (state == ACPI_STATE_S4) 1725 AcpiEnable(); 1726 } else { 1727 status = AcpiEnterSleepState((UINT8)state); 1728 if (ACPI_FAILURE(status)) { 1729 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1730 AcpiFormatException(status)); 1731 break; 1732 } 1733 } 1734 AcpiLeaveSleepState((UINT8)state); 1735 DEVICE_RESUME(root_bus); 1736 sc->acpi_sstate = ACPI_STATE_S0; 1737 acpi_enable_fixed_events(sc); 1738 break; 1739 case ACPI_STATE_S5: 1740 /* 1741 * Shut down cleanly and power off. This will call us back through the 1742 * shutdown handlers. 1743 */ 1744 shutdown_nice(RB_POWEROFF); 1745 break; 1746 case ACPI_STATE_S0: 1747 default: 1748 status = AE_BAD_PARAMETER; 1749 break; 1750 } 1751 1752 /* Disable a second sleep request for a short period */ 1753 if (sc->acpi_sleep_disabled) 1754 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1755 1756 return_ACPI_STATUS (status); 1757 } 1758 1759 /* 1760 * Enable/Disable ACPI 1761 */ 1762 ACPI_STATUS 1763 acpi_Enable(struct acpi_softc *sc) 1764 { 1765 ACPI_STATUS status; 1766 u_int32_t flags; 1767 1768 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1769 ACPI_ASSERTLOCK; 1770 1771 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1772 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1773 if (!sc->acpi_enabled) 1774 status = AcpiEnableSubsystem(flags); 1775 else 1776 status = AE_OK; 1777 1778 if (status == AE_OK) 1779 sc->acpi_enabled = 1; 1780 1781 return_ACPI_STATUS (status); 1782 } 1783 1784 ACPI_STATUS 1785 acpi_Disable(struct acpi_softc *sc) 1786 { 1787 ACPI_STATUS status; 1788 1789 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1790 ACPI_ASSERTLOCK; 1791 1792 if (sc->acpi_enabled) 1793 status = AcpiDisable(); 1794 else 1795 status = AE_OK; 1796 1797 if (status == AE_OK) 1798 sc->acpi_enabled = 0; 1799 1800 return_ACPI_STATUS (status); 1801 } 1802 1803 /* 1804 * ACPI Event Handlers 1805 */ 1806 1807 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1808 1809 static void 1810 acpi_system_eventhandler_sleep(void *arg, int state) 1811 { 1812 ACPI_LOCK_DECL; 1813 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1814 1815 ACPI_LOCK; 1816 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1817 acpi_SetSleepState((struct acpi_softc *)arg, state); 1818 ACPI_UNLOCK; 1819 return_VOID; 1820 } 1821 1822 static void 1823 acpi_system_eventhandler_wakeup(void *arg, int state) 1824 { 1825 ACPI_LOCK_DECL; 1826 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1827 1828 /* Well, what to do? :-) */ 1829 1830 ACPI_LOCK; 1831 ACPI_UNLOCK; 1832 1833 return_VOID; 1834 } 1835 1836 /* 1837 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1838 */ 1839 UINT32 1840 acpi_event_power_button_sleep(void *context) 1841 { 1842 struct acpi_softc *sc = (struct acpi_softc *)context; 1843 1844 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1845 1846 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1847 1848 return_VALUE (ACPI_INTERRUPT_HANDLED); 1849 } 1850 1851 UINT32 1852 acpi_event_power_button_wake(void *context) 1853 { 1854 struct acpi_softc *sc = (struct acpi_softc *)context; 1855 1856 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1857 1858 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1859 1860 return_VALUE (ACPI_INTERRUPT_HANDLED); 1861 } 1862 1863 UINT32 1864 acpi_event_sleep_button_sleep(void *context) 1865 { 1866 struct acpi_softc *sc = (struct acpi_softc *)context; 1867 1868 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1869 1870 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1871 1872 return_VALUE (ACPI_INTERRUPT_HANDLED); 1873 } 1874 1875 UINT32 1876 acpi_event_sleep_button_wake(void *context) 1877 { 1878 struct acpi_softc *sc = (struct acpi_softc *)context; 1879 1880 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1881 1882 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1883 1884 return_VALUE (ACPI_INTERRUPT_HANDLED); 1885 } 1886 1887 /* 1888 * XXX This is kinda ugly, and should not be here. 1889 */ 1890 struct acpi_staticbuf { 1891 ACPI_BUFFER buffer; 1892 char data[512]; 1893 }; 1894 1895 char * 1896 acpi_name(ACPI_HANDLE handle) 1897 { 1898 static struct acpi_staticbuf buf; 1899 1900 ACPI_ASSERTLOCK; 1901 1902 buf.buffer.Length = 512; 1903 buf.buffer.Pointer = &buf.data[0]; 1904 1905 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1906 return (buf.buffer.Pointer); 1907 1908 return ("(unknown path)"); 1909 } 1910 1911 /* 1912 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1913 * parts of the namespace. 1914 */ 1915 int 1916 acpi_avoid(ACPI_HANDLE handle) 1917 { 1918 char *cp, *env, *np; 1919 int len; 1920 1921 np = acpi_name(handle); 1922 if (*np == '\\') 1923 np++; 1924 if ((env = getenv("debug.acpi.avoid")) == NULL) 1925 return (0); 1926 1927 /* Scan the avoid list checking for a match */ 1928 cp = env; 1929 for (;;) { 1930 while ((*cp != 0) && isspace(*cp)) 1931 cp++; 1932 if (*cp == 0) 1933 break; 1934 len = 0; 1935 while ((cp[len] != 0) && !isspace(cp[len])) 1936 len++; 1937 if (!strncmp(cp, np, len)) { 1938 freeenv(env); 1939 return(1); 1940 } 1941 cp += len; 1942 } 1943 freeenv(env); 1944 1945 return (0); 1946 } 1947 1948 /* 1949 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1950 */ 1951 int 1952 acpi_disabled(char *subsys) 1953 { 1954 char *cp, *env; 1955 int len; 1956 1957 if ((env = getenv("debug.acpi.disabled")) == NULL) 1958 return (0); 1959 if (strcmp(env, "all") == 0) { 1960 freeenv(env); 1961 return (1); 1962 } 1963 1964 /* Scan the disable list, checking for a match. */ 1965 cp = env; 1966 for (;;) { 1967 while (*cp != '\0' && isspace(*cp)) 1968 cp++; 1969 if (*cp == '\0') 1970 break; 1971 len = 0; 1972 while (cp[len] != '\0' && !isspace(cp[len])) 1973 len++; 1974 if (strncmp(cp, subsys, len) == 0) { 1975 freeenv(env); 1976 return (1); 1977 } 1978 cp += len; 1979 } 1980 freeenv(env); 1981 1982 return (0); 1983 } 1984 1985 /* 1986 * Device wake capability enable/disable. 1987 */ 1988 void 1989 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1990 { 1991 /* 1992 * TBD: All Power Resources referenced by elements 2 through N 1993 * of the _PRW object are put into the ON state. 1994 */ 1995 1996 (void)acpi_SetInteger(h, "_PSW", enable); 1997 } 1998 1999 void 2000 acpi_device_enable_wake_event(ACPI_HANDLE h) 2001 { 2002 struct acpi_softc *sc; 2003 ACPI_STATUS status; 2004 ACPI_BUFFER prw_buffer; 2005 ACPI_OBJECT *res; 2006 2007 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2008 2009 sc = devclass_get_softc(acpi_devclass, 0); 2010 if (sc == NULL) 2011 return; 2012 2013 /* 2014 * _PRW object is only required for devices that have the ability 2015 * to wake the system from a system sleeping state. 2016 */ 2017 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2018 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2019 if (ACPI_FAILURE(status)) 2020 return; 2021 2022 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2023 if (res == NULL) 2024 return; 2025 2026 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 2027 goto out; 2028 } 2029 2030 /* 2031 * The element 1 of the _PRW object: 2032 * The lowest power system sleeping state that can be entered 2033 * while still providing wake functionality. 2034 * The sleeping state being entered must be greater or equal to 2035 * the power state declared in element 1 of the _PRW object. 2036 */ 2037 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) 2038 goto out; 2039 2040 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) 2041 goto out; 2042 2043 /* 2044 * The element 0 of the _PRW object: 2045 */ 2046 switch(res->Package.Elements[0].Type) { 2047 case ACPI_TYPE_INTEGER: 2048 /* 2049 * If the data type of this package element is numeric, then this 2050 * _PRW package element is the bit index in the GPEx_EN, in the 2051 * GPE blocks described in the FADT, of the enable bit that is 2052 * enabled for the wake event. 2053 */ 2054 2055 status = AcpiEnableGpe(NULL, res->Package.Elements[0].Integer.Value, 2056 ACPI_EVENT_WAKE_ENABLE); 2057 if (ACPI_FAILURE(status)) 2058 printf("%s: EnableEvent Failed\n", __func__); 2059 break; 2060 case ACPI_TYPE_PACKAGE: 2061 /* 2062 * XXX TBD 2063 * 2064 * If the data type of this package element is a package, then this 2065 * _PRW package element is itself a package containing two 2066 * elements. The first is an object reference to the GPE Block 2067 * device that contains the GPE that will be triggered by the wake 2068 * event. The second element is numeric and it contains the bit 2069 * index in the GPEx_EN, in the GPE Block referenced by the 2070 * first element in the package, of the enable bit that is enabled for 2071 * the wake event. 2072 * For example, if this field is a package then it is of the form: 2073 * Package() {\_SB.PCI0.ISA.GPE, 2} 2074 */ 2075 break; 2076 default: 2077 break; 2078 } 2079 2080 out: 2081 if (prw_buffer.Pointer != NULL) 2082 AcpiOsFree(prw_buffer.Pointer); 2083 } 2084 2085 /* 2086 * Control interface. 2087 * 2088 * We multiplex ioctls for all participating ACPI devices here. Individual 2089 * drivers wanting to be accessible via /dev/acpi should use the 2090 * register/deregister interface to make their handlers visible. 2091 */ 2092 struct acpi_ioctl_hook 2093 { 2094 TAILQ_ENTRY(acpi_ioctl_hook) link; 2095 u_long cmd; 2096 acpi_ioctl_fn fn; 2097 void *arg; 2098 }; 2099 2100 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2101 static int acpi_ioctl_hooks_initted; 2102 2103 /* 2104 * Register an ioctl handler. 2105 */ 2106 int 2107 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2108 { 2109 struct acpi_ioctl_hook *hp; 2110 2111 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2112 return (ENOMEM); 2113 hp->cmd = cmd; 2114 hp->fn = fn; 2115 hp->arg = arg; 2116 if (acpi_ioctl_hooks_initted == 0) { 2117 TAILQ_INIT(&acpi_ioctl_hooks); 2118 acpi_ioctl_hooks_initted = 1; 2119 } 2120 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2121 return (0); 2122 } 2123 2124 /* 2125 * Deregister an ioctl handler. 2126 */ 2127 void 2128 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2129 { 2130 struct acpi_ioctl_hook *hp; 2131 2132 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2133 if ((hp->cmd == cmd) && (hp->fn == fn)) 2134 break; 2135 2136 if (hp != NULL) { 2137 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2138 free(hp, M_ACPIDEV); 2139 } 2140 } 2141 2142 static int 2143 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2144 { 2145 return (0); 2146 } 2147 2148 static int 2149 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2150 { 2151 return (0); 2152 } 2153 2154 static int 2155 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2156 { 2157 struct acpi_softc *sc; 2158 struct acpi_ioctl_hook *hp; 2159 int error, xerror, state; 2160 ACPI_LOCK_DECL; 2161 2162 ACPI_LOCK; 2163 2164 error = state = 0; 2165 sc = dev->si_drv1; 2166 2167 /* 2168 * Scan the list of registered ioctls, looking for handlers. 2169 */ 2170 if (acpi_ioctl_hooks_initted) { 2171 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2172 if (hp->cmd == cmd) { 2173 xerror = hp->fn(cmd, addr, hp->arg); 2174 if (xerror != 0) 2175 error = xerror; 2176 goto out; 2177 } 2178 } 2179 } 2180 2181 /* 2182 * Core ioctls are not permitted for non-writable user. 2183 * Currently, other ioctls just fetch information. 2184 * Not changing system behavior. 2185 */ 2186 if((flag & FWRITE) == 0) 2187 return (EPERM); 2188 2189 /* Core system ioctls. */ 2190 switch (cmd) { 2191 case ACPIIO_ENABLE: 2192 if (ACPI_FAILURE(acpi_Enable(sc))) 2193 error = ENXIO; 2194 break; 2195 case ACPIIO_DISABLE: 2196 if (ACPI_FAILURE(acpi_Disable(sc))) 2197 error = ENXIO; 2198 break; 2199 case ACPIIO_SETSLPSTATE: 2200 if (!sc->acpi_enabled) { 2201 error = ENXIO; 2202 break; 2203 } 2204 state = *(int *)addr; 2205 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2206 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2207 error = EINVAL; 2208 } else { 2209 error = EINVAL; 2210 } 2211 break; 2212 default: 2213 if (error == 0) 2214 error = EINVAL; 2215 break; 2216 } 2217 2218 out: 2219 ACPI_UNLOCK; 2220 return (error); 2221 } 2222 2223 static int 2224 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2225 { 2226 char sleep_state[4]; 2227 char buf[16]; 2228 int error; 2229 UINT8 state, TypeA, TypeB; 2230 2231 buf[0] = '\0'; 2232 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 2233 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2234 sprintf(sleep_state, "S%d ", state); 2235 strcat(buf, sleep_state); 2236 } 2237 } 2238 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2239 return (error); 2240 } 2241 2242 static int 2243 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2244 { 2245 char sleep_state[10]; 2246 int error; 2247 u_int new_state, old_state; 2248 2249 old_state = *(u_int *)oidp->oid_arg1; 2250 if (old_state > ACPI_S_STATES_MAX+1) { 2251 strcpy(sleep_state, "unknown"); 2252 } else { 2253 bzero(sleep_state, sizeof(sleep_state)); 2254 strncpy(sleep_state, sleep_state_names[old_state], 2255 sizeof(sleep_state_names[old_state])); 2256 } 2257 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2258 if (error == 0 && req->newptr != NULL) { 2259 new_state = ACPI_STATE_S0; 2260 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2261 if (strncmp(sleep_state, sleep_state_names[new_state], 2262 sizeof(sleep_state)) == 0) 2263 break; 2264 } 2265 if (new_state <= ACPI_S_STATES_MAX + 1) { 2266 if (new_state != old_state) 2267 *(u_int *)oidp->oid_arg1 = new_state; 2268 } else { 2269 error = EINVAL; 2270 } 2271 } 2272 2273 return (error); 2274 } 2275 2276 /* Inform devctl(4) when we receive a Notify. */ 2277 void 2278 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2279 { 2280 char notify_buf[16]; 2281 ACPI_BUFFER handle_buf; 2282 ACPI_STATUS status; 2283 2284 if (subsystem == NULL) 2285 return; 2286 2287 handle_buf.Pointer = NULL; 2288 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2289 status = AcpiNsHandleToPathname(h, &handle_buf); 2290 if (ACPI_FAILURE(status)) 2291 return; 2292 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2293 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2294 AcpiOsFree(handle_buf.Pointer); 2295 } 2296 2297 #ifdef ACPI_DEBUG 2298 /* 2299 * Support for parsing debug options from the kernel environment. 2300 * 2301 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2302 * by specifying the names of the bits in the debug.acpi.layer and 2303 * debug.acpi.level environment variables. Bits may be unset by 2304 * prefixing the bit name with !. 2305 */ 2306 struct debugtag 2307 { 2308 char *name; 2309 UINT32 value; 2310 }; 2311 2312 static struct debugtag dbg_layer[] = { 2313 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2314 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2315 {"ACPI_EVENTS", ACPI_EVENTS}, 2316 {"ACPI_TABLES", ACPI_TABLES}, 2317 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2318 {"ACPI_PARSER", ACPI_PARSER}, 2319 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2320 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2321 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2322 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2323 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2324 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2325 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2326 2327 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2328 {"ACPI_BATTERY", ACPI_BATTERY}, 2329 {"ACPI_BUS", ACPI_BUS}, 2330 {"ACPI_BUTTON", ACPI_BUTTON}, 2331 {"ACPI_EC", ACPI_EC}, 2332 {"ACPI_FAN", ACPI_FAN}, 2333 {"ACPI_POWERRES", ACPI_POWERRES}, 2334 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2335 {"ACPI_THERMAL", ACPI_THERMAL}, 2336 {"ACPI_TIMER", ACPI_TIMER}, 2337 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2338 {NULL, 0} 2339 }; 2340 2341 static struct debugtag dbg_level[] = { 2342 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2343 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2344 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2345 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2346 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2347 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2348 2349 /* Trace verbosity level 1 [Standard Trace Level] */ 2350 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2351 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2352 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2353 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2354 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2355 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2356 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2357 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2358 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2359 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2360 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2361 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2362 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2363 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2364 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2365 2366 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2367 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2368 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2369 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2370 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2371 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2372 2373 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2374 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2375 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2376 {"ACPI_LV_IO", ACPI_LV_IO}, 2377 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2378 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2379 2380 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2381 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2382 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2383 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2384 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2385 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2386 {NULL, 0} 2387 }; 2388 2389 static void 2390 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2391 { 2392 char *ep; 2393 int i, l; 2394 int set; 2395 2396 while (*cp) { 2397 if (isspace(*cp)) { 2398 cp++; 2399 continue; 2400 } 2401 ep = cp; 2402 while (*ep && !isspace(*ep)) 2403 ep++; 2404 if (*cp == '!') { 2405 set = 0; 2406 cp++; 2407 if (cp == ep) 2408 continue; 2409 } else { 2410 set = 1; 2411 } 2412 l = ep - cp; 2413 for (i = 0; tag[i].name != NULL; i++) { 2414 if (!strncmp(cp, tag[i].name, l)) { 2415 if (set) 2416 *flag |= tag[i].value; 2417 else 2418 *flag &= ~tag[i].value; 2419 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2420 } 2421 } 2422 cp = ep; 2423 } 2424 } 2425 2426 static void 2427 acpi_set_debugging(void *junk) 2428 { 2429 char *cp; 2430 2431 if (cold) { 2432 AcpiDbgLayer = 0; 2433 AcpiDbgLevel = 0; 2434 } 2435 2436 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2437 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2438 freeenv(cp); 2439 } 2440 if ((cp = getenv("debug.acpi.level")) != NULL) { 2441 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2442 freeenv(cp); 2443 } 2444 2445 if (cold) { 2446 printf("ACPI debug layer 0x%x debug level 0x%x\n", 2447 AcpiDbgLayer, AcpiDbgLevel); 2448 } 2449 } 2450 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2451 NULL); 2452 2453 static int 2454 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2455 { 2456 int error, *dbg; 2457 struct debugtag *tag; 2458 struct sbuf sb; 2459 2460 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2461 return (ENOMEM); 2462 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2463 tag = &dbg_layer[0]; 2464 dbg = &AcpiDbgLayer; 2465 } else { 2466 tag = &dbg_level[0]; 2467 dbg = &AcpiDbgLevel; 2468 } 2469 2470 /* Get old values if this is a get request. */ 2471 if (*dbg == 0) { 2472 sbuf_cpy(&sb, "NONE"); 2473 } else if (req->newptr == NULL) { 2474 for (; tag->name != NULL; tag++) { 2475 if ((*dbg & tag->value) == tag->value) 2476 sbuf_printf(&sb, "%s ", tag->name); 2477 } 2478 } 2479 sbuf_trim(&sb); 2480 sbuf_finish(&sb); 2481 2482 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2483 sbuf_delete(&sb); 2484 2485 /* If the user is setting a string, parse it. */ 2486 if (error == 0 && req->newptr != NULL) { 2487 *dbg = 0; 2488 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2489 acpi_set_debugging(NULL); 2490 } 2491 2492 return (error); 2493 } 2494 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2495 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2496 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2497 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2498 #endif 2499 2500 static int 2501 acpi_pm_func(u_long cmd, void *arg, ...) 2502 { 2503 int state, acpi_state; 2504 int error; 2505 struct acpi_softc *sc; 2506 va_list ap; 2507 2508 error = 0; 2509 switch (cmd) { 2510 case POWER_CMD_SUSPEND: 2511 sc = (struct acpi_softc *)arg; 2512 if (sc == NULL) { 2513 error = EINVAL; 2514 goto out; 2515 } 2516 2517 va_start(ap, arg); 2518 state = va_arg(ap, int); 2519 va_end(ap); 2520 2521 switch (state) { 2522 case POWER_SLEEP_STATE_STANDBY: 2523 acpi_state = sc->acpi_standby_sx; 2524 break; 2525 case POWER_SLEEP_STATE_SUSPEND: 2526 acpi_state = sc->acpi_suspend_sx; 2527 break; 2528 case POWER_SLEEP_STATE_HIBERNATE: 2529 acpi_state = ACPI_STATE_S4; 2530 break; 2531 default: 2532 error = EINVAL; 2533 goto out; 2534 } 2535 2536 acpi_SetSleepState(sc, acpi_state); 2537 break; 2538 default: 2539 error = EINVAL; 2540 goto out; 2541 } 2542 2543 out: 2544 return (error); 2545 } 2546 2547 static void 2548 acpi_pm_register(void *arg) 2549 { 2550 if (!cold || resource_disabled("acpi", 0)) 2551 return; 2552 2553 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2554 } 2555 2556 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2557