acpi.c revision 128045
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: head/sys/dev/acpica/acpi.c 128045 2004-04-09 06:40:03Z njl $ 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 60MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 61 62/* Hooks for the ACPI CA debugging infrastructure */ 63#define _COMPONENT ACPI_BUS 64ACPI_MODULE_NAME("ACPI") 65 66static d_open_t acpiopen; 67static d_close_t acpiclose; 68static d_ioctl_t acpiioctl; 69 70static 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 79static 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 */ 83static int acpi_off_state = ACPI_STATE_S5; 84 85#if __FreeBSD_version >= 500000 86struct mtx acpi_mutex; 87#endif 88 89struct acpi_quirks { 90 char *OemId; 91 uint32_t OemRevision; 92 char *value; 93}; 94 95#define ACPI_OEM_REV_ANY 0 96 97static 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 106static int acpi_modevent(struct module *mod, int event, void *junk); 107static void acpi_identify(driver_t *driver, device_t parent); 108static int acpi_probe(device_t dev); 109static int acpi_attach(device_t dev); 110static void acpi_quirks_set(void); 111static device_t acpi_add_child(device_t bus, int order, const char *name, 112 int unit); 113static int acpi_print_child(device_t bus, device_t child); 114static int acpi_read_ivar(device_t dev, device_t child, int index, 115 uintptr_t *result); 116static int acpi_write_ivar(device_t dev, device_t child, int index, 117 uintptr_t value); 118static int acpi_set_resource(device_t dev, device_t child, int type, 119 int rid, u_long start, u_long count); 120static int acpi_get_resource(device_t dev, device_t child, int type, 121 int rid, u_long *startp, u_long *countp); 122static 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); 125static int acpi_release_resource(device_t bus, device_t child, int type, 126 int rid, struct resource *r); 127static uint32_t acpi_isa_get_logicalid(device_t dev); 128static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 129static int acpi_isa_pnp_probe(device_t bus, device_t child, 130 struct isa_pnp_id *ids); 131static void acpi_probe_children(device_t bus); 132static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 133 void *context, void **status); 134static void acpi_shutdown_pre_sync(void *arg, int howto); 135static void acpi_shutdown_final(void *arg, int howto); 136static void acpi_shutdown_poweroff(void *arg); 137static void acpi_enable_fixed_events(struct acpi_softc *sc); 138static void acpi_system_eventhandler_sleep(void *arg, int state); 139static void acpi_system_eventhandler_wakeup(void *arg, int state); 140static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 141static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 142static int acpi_pm_func(u_long cmd, void *arg, ...); 143static int acpi_child_location_str_method(device_t acdev, device_t child, 144 char *buf, size_t buflen); 145static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 146 char *buf, size_t buflen); 147 148 149static device_method_t acpi_methods[] = { 150 /* Device interface */ 151 DEVMETHOD(device_identify, acpi_identify), 152 DEVMETHOD(device_probe, acpi_probe), 153 DEVMETHOD(device_attach, acpi_attach), 154 DEVMETHOD(device_detach, bus_generic_detach), 155 DEVMETHOD(device_shutdown, bus_generic_shutdown), 156 DEVMETHOD(device_suspend, bus_generic_suspend), 157 DEVMETHOD(device_resume, bus_generic_resume), 158 159 /* Bus interface */ 160 DEVMETHOD(bus_add_child, acpi_add_child), 161 DEVMETHOD(bus_print_child, acpi_print_child), 162 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 163 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 164 DEVMETHOD(bus_set_resource, acpi_set_resource), 165 DEVMETHOD(bus_get_resource, acpi_get_resource), 166 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 167 DEVMETHOD(bus_release_resource, acpi_release_resource), 168 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 169 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 170 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 171 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 172 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 173 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 174 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 175 176 /* ISA emulation */ 177 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 178 179 {0, 0} 180}; 181 182static driver_t acpi_driver = { 183 "acpi", 184 acpi_methods, 185 sizeof(struct acpi_softc), 186}; 187 188static devclass_t acpi_devclass; 189DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 190MODULE_VERSION(acpi, 1); 191 192SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 193static char acpi_ca_version[12]; 194SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 195 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 196 197/* 198 * Allow override of whether methods execute in parallel or not. 199 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 200 * errors for AML that really can't handle parallel method execution. 201 * It is off by default since this breaks recursive methods and 202 * some IBMs use such code. 203 */ 204static int acpi_serialize_methods; 205TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 206 207/* 208 * Allow override of whether to support the _OSI method. This allows us 209 * to claim compatibility with various MS OSs without changing the value 210 * we report for _OS. This is enabled by default since it fixes some 211 * problems with interrupt routing although it can be disabled if it 212 * causes problems. See the definition of "AcpiGbl_ValidOsiStrings" for 213 * a list of systems we claim. 214 */ 215static int acpi_osi_method = 1; 216TUNABLE_INT("hw.acpi.osi_method", &acpi_osi_method); 217 218/* 219 * ACPI can only be loaded as a module by the loader; activating it after 220 * system bootstrap time is not useful, and can be fatal to the system. 221 * It also cannot be unloaded, since the entire system bus heirarchy hangs 222 * off it. 223 */ 224static int 225acpi_modevent(struct module *mod, int event, void *junk) 226{ 227 switch(event) { 228 case MOD_LOAD: 229 if (!cold) { 230 printf("The ACPI driver cannot be loaded after boot.\n"); 231 return (EPERM); 232 } 233 break; 234 case MOD_UNLOAD: 235 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 236 return (EBUSY); 237 break; 238 default: 239 break; 240 } 241 return (0); 242} 243 244/* 245 * Perform early initialization. 246 */ 247ACPI_STATUS 248acpi_Startup(void) 249{ 250#ifdef ACPI_DEBUGGER 251 char *debugpoint; 252#endif 253 static int error, started = 0; 254 255 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 256 257 if (started) 258 return_VALUE (error); 259 started = 1; 260 261#if __FreeBSD_version >= 500000 262 /* Initialise the ACPI mutex */ 263 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 264#endif 265 266 /* 267 * Set the globals from our tunables. This is needed because ACPI-CA 268 * uses UINT8 for some values and we have no tunable_uint8. 269 */ 270 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 271 AcpiGbl_CreateOsiMethod = acpi_osi_method; 272 273 /* Start up the ACPI CA subsystem. */ 274#ifdef ACPI_DEBUGGER 275 debugpoint = getenv("debug.acpi.debugger"); 276 if (debugpoint) { 277 if (!strcmp(debugpoint, "init")) 278 acpi_EnterDebugger(); 279 freeenv(debugpoint); 280 } 281#endif 282 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 283 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 284 return_VALUE (error); 285 } 286#ifdef ACPI_DEBUGGER 287 debugpoint = getenv("debug.acpi.debugger"); 288 if (debugpoint) { 289 if (!strcmp(debugpoint, "tables")) 290 acpi_EnterDebugger(); 291 freeenv(debugpoint); 292 } 293#endif 294 295 if (ACPI_FAILURE(error = AcpiLoadTables())) { 296 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 297 return_VALUE(error); 298 } 299 300 /* Set up any quirks we have for this XSDT. */ 301 acpi_quirks_set(); 302 if (acpi_disabled("acpi")) 303 return_VALUE (AE_ERROR); 304 305 return_VALUE (AE_OK); 306} 307 308/* 309 * Detect ACPI, perform early initialisation 310 */ 311static void 312acpi_identify(driver_t *driver, device_t parent) 313{ 314 device_t child; 315 316 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 317 318 if (!cold) 319 return_VOID; 320 321 /* Check that we haven't been disabled with a hint. */ 322 if (resource_disabled("acpi", 0)) 323 return_VOID; 324 325 /* Make sure we're not being doubly invoked. */ 326 if (device_find_child(parent, "acpi", 0) != NULL) 327 return_VOID; 328 329 /* Initialize ACPI-CA. */ 330 if (ACPI_FAILURE(acpi_Startup())) 331 return_VOID; 332 333 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 334 335 /* Attach the actual ACPI device. */ 336 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 337 device_printf(parent, "ACPI: could not attach\n"); 338 return_VOID; 339 } 340} 341 342/* 343 * Fetch some descriptive data from ACPI to put in our attach message 344 */ 345static int 346acpi_probe(device_t dev) 347{ 348 ACPI_TABLE_HEADER th; 349 char buf[20]; 350 int error; 351 struct sbuf sb; 352 ACPI_STATUS status; 353 ACPI_LOCK_DECL; 354 355 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 356 357 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 358 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 359 360 device_printf(dev, "Other PM system enabled.\n"); 361 return_VALUE(ENXIO); 362 } 363 364 ACPI_LOCK; 365 366 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 367 device_printf(dev, "couldn't get XSDT header: %s\n", 368 AcpiFormatException(status)); 369 error = ENXIO; 370 } else { 371 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 372 sbuf_bcat(&sb, th.OemId, 6); 373 sbuf_trim(&sb); 374 sbuf_putc(&sb, ' '); 375 sbuf_bcat(&sb, th.OemTableId, 8); 376 sbuf_trim(&sb); 377 sbuf_finish(&sb); 378 device_set_desc_copy(dev, sbuf_data(&sb)); 379 sbuf_delete(&sb); 380 error = 0; 381 } 382 ACPI_UNLOCK; 383 return_VALUE(error); 384} 385 386static int 387acpi_attach(device_t dev) 388{ 389 struct acpi_softc *sc; 390 ACPI_STATUS status; 391 int error; 392 UINT32 flags; 393 char *env; 394#ifdef ACPI_DEBUGGER 395 char *debugpoint; 396#endif 397 ACPI_LOCK_DECL; 398 399 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 400 ACPI_LOCK; 401 sc = device_get_softc(dev); 402 bzero(sc, sizeof(*sc)); 403 sc->acpi_dev = dev; 404 405#ifdef ACPI_DEBUGGER 406 debugpoint = getenv("debug.acpi.debugger"); 407 if (debugpoint) { 408 if (!strcmp(debugpoint, "spaces")) 409 acpi_EnterDebugger(); 410 freeenv(debugpoint); 411 } 412#endif 413 414 /* Install the default address space handlers. */ 415 error = ENXIO; 416 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 417 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 418 if (ACPI_FAILURE(status)) { 419 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 420 AcpiFormatException(status)); 421 goto out; 422 } 423 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 424 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 425 if (ACPI_FAILURE(status)) { 426 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 427 AcpiFormatException(status)); 428 goto out; 429 } 430 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 431 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 432 if (ACPI_FAILURE(status)) { 433 device_printf(dev, "could not initialise PciConfig handler: %s\n", 434 AcpiFormatException(status)); 435 goto out; 436 } 437 438 /* 439 * Bring ACPI fully online. 440 * 441 * Note that some systems (specifically, those with namespace evaluation 442 * issues that require the avoidance of parts of the namespace) must 443 * avoid running _INI and _STA on everything, as well as dodging the final 444 * object init pass. 445 * 446 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 447 * 448 * XXX We should arrange for the object init pass after we have attached 449 * all our child devices, but on many systems it works here. 450 */ 451#ifdef ACPI_DEBUGGER 452 debugpoint = getenv("debug.acpi.debugger"); 453 if (debugpoint) { 454 if (!strcmp(debugpoint, "enable")) 455 acpi_EnterDebugger(); 456 freeenv(debugpoint); 457 } 458#endif 459 flags = 0; 460 if (testenv("debug.acpi.avoid")) 461 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 462 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 463 device_printf(dev, "Could not enable ACPI: %s\n", 464 AcpiFormatException(status)); 465 goto out; 466 } 467 468 /* 469 * Call the ECDT probe function to provide EC functionality before 470 * the namespace has been evaluated. 471 */ 472 acpi_ec_ecdt_probe(dev); 473 474 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 475 device_printf(dev, "Could not initialize ACPI objects: %s\n", 476 AcpiFormatException(status)); 477 goto out; 478 } 479 480 /* 481 * Setup our sysctl tree. 482 * 483 * XXX: This doesn't check to make sure that none of these fail. 484 */ 485 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 486 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 487 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 488 device_get_name(dev), CTLFLAG_RD, 0, ""); 489 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 490 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 491 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 492 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 493 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 494 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 495 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 496 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 497 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 498 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 499 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 500 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 501 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 502 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 503 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 504 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 505 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 506 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 507 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 508 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 509 &sc->acpi_sleep_delay, 0, "sleep delay"); 510 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 511 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 512 &sc->acpi_s4bios, 0, "S4BIOS mode"); 513 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 514 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 515 &sc->acpi_verbose, 0, "verbose mode"); 516 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 517 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 518 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 519 520 /* 521 * Default to 5 seconds before sleeping to give some machines time to 522 * stabilize. 523 */ 524 sc->acpi_sleep_delay = 5; 525 sc->acpi_disable_on_poweroff = 1; 526 if (bootverbose) 527 sc->acpi_verbose = 1; 528 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 529 sc->acpi_verbose = 1; 530 freeenv(env); 531 } 532 533 /* Only enable S4BIOS by default if the FACS says it is available. */ 534 if (AcpiGbl_FACS->S4Bios_f != 0) 535 sc->acpi_s4bios = 1; 536 537 /* 538 * Dispatch the default sleep state to devices. 539 * TBD: should be configured from userland policy manager. 540 */ 541 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 542 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 543 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 544 sc->acpi_standby_sx = ACPI_STATE_S1; 545 sc->acpi_suspend_sx = ACPI_STATE_S3; 546 547 acpi_enable_fixed_events(sc); 548 549 /* 550 * Scan the namespace and attach/initialise children. 551 */ 552#ifdef ACPI_DEBUGGER 553 debugpoint = getenv("debug.acpi.debugger"); 554 if (debugpoint) { 555 if (!strcmp(debugpoint, "probe")) 556 acpi_EnterDebugger(); 557 freeenv(debugpoint); 558 } 559#endif 560 561 /* Register our shutdown handlers */ 562 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 563 SHUTDOWN_PRI_LAST); 564 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 565 SHUTDOWN_PRI_LAST); 566 567 /* 568 * Register our acpi event handlers. 569 * XXX should be configurable eg. via userland policy manager. 570 */ 571 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 572 sc, ACPI_EVENT_PRI_LAST); 573 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 574 sc, ACPI_EVENT_PRI_LAST); 575 576 /* Flag our initial states. */ 577 sc->acpi_enabled = 1; 578 sc->acpi_sstate = ACPI_STATE_S0; 579 sc->acpi_sleep_disabled = 0; 580 581 /* Create the control device */ 582 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 583 "acpi"); 584 sc->acpi_dev_t->si_drv1 = sc; 585 586#ifdef ACPI_DEBUGGER 587 debugpoint = getenv("debug.acpi.debugger"); 588 if (debugpoint) { 589 if (strcmp(debugpoint, "running") == 0) 590 acpi_EnterDebugger(); 591 freeenv(debugpoint); 592 } 593#endif 594 595#ifdef ACPI_USE_THREADS 596 if ((error = acpi_task_thread_init())) 597 goto out; 598#endif 599 600 if ((error = acpi_machdep_init(dev))) 601 goto out; 602 603 /* Register ACPI again to pass the correct argument of pm_func. */ 604 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 605 606 if (!acpi_disabled("bus")) 607 acpi_probe_children(dev); 608 609 error = 0; 610 611 out: 612 ACPI_UNLOCK; 613 return_VALUE (error); 614} 615 616static void 617acpi_quirks_set() 618{ 619 XSDT_DESCRIPTOR *xsdt; 620 struct acpi_quirks *quirk; 621 char *env, *tmp; 622 int len; 623 624 /* 625 * If the user loaded a custom table or disabled "quirks", leave 626 * the settings alone. 627 */ 628 len = 0; 629 if ((env = getenv("acpi_dsdt_load")) != NULL) { 630 /* XXX No strcasecmp but this is good enough. */ 631 if (*env == 'Y' || *env == 'y') 632 goto out; 633 freeenv(env); 634 } 635 if ((env = getenv("debug.acpi.disabled")) != NULL) { 636 if (strstr("quirks", env) != NULL) 637 goto out; 638 len = strlen(env); 639 } 640 641 /* 642 * Search through our quirk table and concatenate the disabled 643 * values with whatever we find. 644 */ 645 xsdt = AcpiGbl_XSDT; 646 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) { 647 if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) && 648 (xsdt->OemRevision == quirk->OemRevision || 649 quirk->OemRevision == ACPI_OEM_REV_ANY)) { 650 len += strlen(quirk->value) + 2; 651 if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL) 652 goto out; 653 sprintf(tmp, "%s %s", env ? env : "", quirk->value); 654 setenv("debug.acpi.disabled", tmp); 655 free(tmp, M_TEMP); 656 break; 657 } 658 } 659 660out: 661 if (env) 662 freeenv(env); 663} 664 665/* 666 * Handle a new device being added 667 */ 668static device_t 669acpi_add_child(device_t bus, int order, const char *name, int unit) 670{ 671 struct acpi_device *ad; 672 device_t child; 673 674 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 675 return (NULL); 676 677 resource_list_init(&ad->ad_rl); 678 679 child = device_add_child_ordered(bus, order, name, unit); 680 if (child != NULL) 681 device_set_ivars(child, ad); 682 return (child); 683} 684 685static int 686acpi_print_child(device_t bus, device_t child) 687{ 688 struct acpi_device *adev = device_get_ivars(child); 689 struct resource_list *rl = &adev->ad_rl; 690 int retval = 0; 691 692 retval += bus_print_child_header(bus, child); 693 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 694 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 695 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 696 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 697 retval += bus_print_child_footer(bus, child); 698 699 return (retval); 700} 701 702/* Location hint for devctl(8) */ 703static int 704acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 705 size_t buflen) 706{ 707 struct acpi_device *dinfo = device_get_ivars(child); 708 709 if (dinfo->ad_handle) 710 snprintf(buf, buflen, "path=%s", acpi_name(dinfo->ad_handle)); 711 else 712 snprintf(buf, buflen, "magic=unknown"); 713 return (0); 714} 715 716/* PnP information for devctl(8) */ 717static int 718acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 719 size_t buflen) 720{ 721 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 722 ACPI_DEVICE_INFO *adinfo; 723 struct acpi_device *dinfo = device_get_ivars(child); 724 char *end; 725 int error; 726 727 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 728 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 729 730 if (error) 731 snprintf(buf, buflen, "Unknown"); 732 else 733 snprintf(buf, buflen, "_HID=%s _UID=%lu", 734 (adinfo->Valid & ACPI_VALID_HID) ? 735 adinfo->HardwareId.Value : "UNKNOWN", 736 (adinfo->Valid & ACPI_VALID_UID) ? 737 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 738 739 if (adinfo) 740 AcpiOsFree(adinfo); 741 742 return (0); 743} 744 745/* 746 * Handle per-device ivars 747 */ 748static int 749acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 750{ 751 struct acpi_device *ad; 752 753 if ((ad = device_get_ivars(child)) == NULL) { 754 printf("device has no ivars\n"); 755 return (ENOENT); 756 } 757 758 /* ACPI and ISA compatibility ivars */ 759 switch(index) { 760 case ACPI_IVAR_HANDLE: 761 *(ACPI_HANDLE *)result = ad->ad_handle; 762 break; 763 case ACPI_IVAR_MAGIC: 764 *(int *)result = ad->ad_magic; 765 break; 766 case ACPI_IVAR_PRIVATE: 767 *(void **)result = ad->ad_private; 768 break; 769 case ISA_IVAR_VENDORID: 770 case ISA_IVAR_SERIAL: 771 case ISA_IVAR_COMPATID: 772 *(int *)result = -1; 773 break; 774 case ISA_IVAR_LOGICALID: 775 *(int *)result = acpi_isa_get_logicalid(child); 776 break; 777 default: 778 return (ENOENT); 779 } 780 781 return (0); 782} 783 784static int 785acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 786{ 787 struct acpi_device *ad; 788 789 if ((ad = device_get_ivars(child)) == NULL) { 790 printf("device has no ivars\n"); 791 return (ENOENT); 792 } 793 794 switch(index) { 795 case ACPI_IVAR_HANDLE: 796 ad->ad_handle = (ACPI_HANDLE)value; 797 break; 798 case ACPI_IVAR_MAGIC: 799 ad->ad_magic = (int)value; 800 break; 801 case ACPI_IVAR_PRIVATE: 802 ad->ad_private = (void *)value; 803 break; 804 default: 805 panic("bad ivar write request (%d)", index); 806 return (ENOENT); 807 } 808 809 return (0); 810} 811 812/* 813 * Handle child resource allocation/removal 814 */ 815static int 816acpi_set_resource(device_t dev, device_t child, int type, int rid, 817 u_long start, u_long count) 818{ 819 struct acpi_device *ad = device_get_ivars(child); 820 struct resource_list *rl = &ad->ad_rl; 821 822 resource_list_add(rl, type, rid, start, start + count -1, count); 823 824 return(0); 825} 826 827static int 828acpi_get_resource(device_t dev, device_t child, int type, int rid, 829 u_long *startp, u_long *countp) 830{ 831 struct acpi_device *ad = device_get_ivars(child); 832 struct resource_list *rl = &ad->ad_rl; 833 struct resource_list_entry *rle; 834 835 rle = resource_list_find(rl, type, rid); 836 if (!rle) 837 return(ENOENT); 838 839 if (startp) 840 *startp = rle->start; 841 if (countp) 842 *countp = rle->count; 843 844 return (0); 845} 846 847static struct resource * 848acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 849 u_long start, u_long end, u_long count, u_int flags) 850{ 851 struct acpi_device *ad = device_get_ivars(child); 852 struct resource_list *rl = &ad->ad_rl; 853 854 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 855 flags)); 856} 857 858static int 859acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 860{ 861 struct acpi_device *ad = device_get_ivars(child); 862 struct resource_list *rl = &ad->ad_rl; 863 864 return (resource_list_release(rl, bus, child, type, rid, r)); 865} 866 867/* Allocate an IO port or memory resource, given its GAS. */ 868struct resource * 869acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 870{ 871 int type; 872 873 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 874 gas->RegisterBitWidth < 8) 875 return (NULL); 876 877 switch (gas->AddressSpaceId) { 878 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 879 type = SYS_RES_MEMORY; 880 break; 881 case ACPI_ADR_SPACE_SYSTEM_IO: 882 type = SYS_RES_IOPORT; 883 break; 884 default: 885 return (NULL); 886 } 887 888 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 889 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE)); 890} 891 892/* 893 * Handle ISA-like devices probing for a PnP ID to match. 894 */ 895#define PNP_EISAID(s) \ 896 ((((s[0] - '@') & 0x1f) << 2) \ 897 | (((s[1] - '@') & 0x18) >> 3) \ 898 | (((s[1] - '@') & 0x07) << 13) \ 899 | (((s[2] - '@') & 0x1f) << 8) \ 900 | (PNP_HEXTONUM(s[4]) << 16) \ 901 | (PNP_HEXTONUM(s[3]) << 20) \ 902 | (PNP_HEXTONUM(s[6]) << 24) \ 903 | (PNP_HEXTONUM(s[5]) << 28)) 904 905static uint32_t 906acpi_isa_get_logicalid(device_t dev) 907{ 908 ACPI_DEVICE_INFO *devinfo; 909 ACPI_BUFFER buf; 910 ACPI_HANDLE h; 911 ACPI_STATUS error; 912 u_int32_t pnpid; 913 ACPI_LOCK_DECL; 914 915 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 916 917 pnpid = 0; 918 buf.Pointer = NULL; 919 buf.Length = ACPI_ALLOCATE_BUFFER; 920 921 ACPI_LOCK; 922 923 /* Fetch and validate the HID. */ 924 if ((h = acpi_get_handle(dev)) == NULL) 925 goto out; 926 error = AcpiGetObjectInfo(h, &buf); 927 if (ACPI_FAILURE(error)) 928 goto out; 929 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 930 931 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 932 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 933 934out: 935 if (buf.Pointer != NULL) 936 AcpiOsFree(buf.Pointer); 937 ACPI_UNLOCK; 938 return_VALUE (pnpid); 939} 940 941static int 942acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 943{ 944 ACPI_DEVICE_INFO *devinfo; 945 ACPI_BUFFER buf; 946 ACPI_HANDLE h; 947 ACPI_STATUS error; 948 uint32_t *pnpid; 949 int valid, i; 950 ACPI_LOCK_DECL; 951 952 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 953 954 pnpid = cids; 955 valid = 0; 956 buf.Pointer = NULL; 957 buf.Length = ACPI_ALLOCATE_BUFFER; 958 959 ACPI_LOCK; 960 961 /* Fetch and validate the CID */ 962 if ((h = acpi_get_handle(dev)) == NULL) 963 goto out; 964 error = AcpiGetObjectInfo(h, &buf); 965 if (ACPI_FAILURE(error)) 966 goto out; 967 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 968 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 969 goto out; 970 971 if (devinfo->CompatibilityId.Count < count) 972 count = devinfo->CompatibilityId.Count; 973 for (i = 0; i < count; i++) { 974 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 975 continue; 976 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 977 valid++; 978 } 979 980out: 981 if (buf.Pointer != NULL) 982 AcpiOsFree(buf.Pointer); 983 ACPI_UNLOCK; 984 return_VALUE (valid); 985} 986 987static int 988acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 989{ 990 int result, cid_count, i; 991 uint32_t lid, cids[8]; 992 993 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 994 995 /* 996 * ISA-style drivers attached to ACPI may persist and 997 * probe manually if we return ENOENT. We never want 998 * that to happen, so don't ever return it. 999 */ 1000 result = ENXIO; 1001 1002 /* Scan the supplied IDs for a match */ 1003 lid = acpi_isa_get_logicalid(child); 1004 cid_count = acpi_isa_get_compatid(child, cids, 8); 1005 while (ids && ids->ip_id) { 1006 if (lid == ids->ip_id) { 1007 result = 0; 1008 goto out; 1009 } 1010 for (i = 0; i < cid_count; i++) { 1011 if (cids[i] == ids->ip_id) { 1012 result = 0; 1013 goto out; 1014 } 1015 } 1016 ids++; 1017 } 1018 1019 out: 1020 return_VALUE (result); 1021} 1022 1023/* 1024 * Scan relevant portions of the ACPI namespace and attach child devices. 1025 * 1026 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1027 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1028 */ 1029static void 1030acpi_probe_children(device_t bus) 1031{ 1032 ACPI_HANDLE parent; 1033 ACPI_STATUS status; 1034 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1035 int i; 1036 1037 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1038 ACPI_ASSERTLOCK; 1039 1040 /* Create any static children by calling device identify methods. */ 1041 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1042 bus_generic_probe(bus); 1043 1044 /* 1045 * Scan the namespace and insert placeholders for all the devices that 1046 * we find. 1047 * 1048 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1049 * we want to create nodes for all devices, not just those that are 1050 * currently present. (This assumes that we don't want to create/remove 1051 * devices as they appear, which might be smarter.) 1052 */ 1053 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1054 for (i = 0; scopes[i] != NULL; i++) { 1055 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1056 if (ACPI_SUCCESS(status)) { 1057 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1058 bus, NULL); 1059 } 1060 } 1061 1062 /* 1063 * Scan all of the child devices we have created and let them probe/attach. 1064 */ 1065 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1066 bus_generic_attach(bus); 1067 1068 /* 1069 * Some of these children may have attached others as part of their attach 1070 * process (eg. the root PCI bus driver), so rescan. 1071 */ 1072 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1073 bus_generic_attach(bus); 1074 1075 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1076 return_VOID; 1077} 1078 1079/* 1080 * Evaluate a child device and determine whether we might attach a device to 1081 * it. 1082 */ 1083static ACPI_STATUS 1084acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1085{ 1086 ACPI_OBJECT_TYPE type; 1087 device_t child, bus = (device_t)context; 1088 1089 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1090 1091 /* Skip this device if we think we'll have trouble with it. */ 1092 if (acpi_avoid(handle)) 1093 return_ACPI_STATUS (AE_OK); 1094 1095 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1096 switch(type) { 1097 case ACPI_TYPE_DEVICE: 1098 case ACPI_TYPE_PROCESSOR: 1099 case ACPI_TYPE_THERMAL: 1100 case ACPI_TYPE_POWER: 1101 if (acpi_disabled("children")) 1102 break; 1103 1104 /* 1105 * Create a placeholder device for this node. Sort the placeholder 1106 * so that the probe/attach passes will run breadth-first. 1107 */ 1108 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1109 acpi_name(handle))); 1110 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 1111 if (child == NULL) 1112 break; 1113 acpi_set_handle(child, handle); 1114 1115 /* 1116 * Check that the device is present. If it's not present, 1117 * leave it disabled (so that we have a device_t attached to 1118 * the handle, but we don't probe it). 1119 */ 1120 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1121 device_disable(child); 1122 break; 1123 } 1124 1125 /* 1126 * Get the device's resource settings and attach them. 1127 * Note that if the device has _PRS but no _CRS, we need 1128 * to decide when it's appropriate to try to configure the 1129 * device. Ignore the return value here; it's OK for the 1130 * device not to have any resources. 1131 */ 1132 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1133 1134 /* If we're debugging, probe/attach now rather than later */ 1135 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 1136 break; 1137 } 1138 } 1139 1140 return_ACPI_STATUS (AE_OK); 1141} 1142 1143static void 1144acpi_shutdown_pre_sync(void *arg, int howto) 1145{ 1146 struct acpi_softc *sc = arg; 1147 1148 ACPI_ASSERTLOCK; 1149 1150 /* 1151 * Disable all ACPI events before soft off, otherwise the system 1152 * will be turned on again on some laptops. 1153 * 1154 * XXX this should probably be restricted to masking some events just 1155 * before powering down, since we may still need ACPI during the 1156 * shutdown process. 1157 */ 1158 if (sc->acpi_disable_on_poweroff) 1159 acpi_Disable(sc); 1160} 1161 1162static void 1163acpi_shutdown_final(void *arg, int howto) 1164{ 1165 1166 ACPI_ASSERTLOCK; 1167 1168 /* 1169 * If powering off, run the actual shutdown code on each processor. 1170 * It will only perform the shutdown on the BSP. Some chipsets do 1171 * not power off the system correctly if called from an AP. 1172 */ 1173 if ((howto & RB_POWEROFF) != 0) { 1174 printf("Powering system off using ACPI\n"); 1175 smp_rendezvous(NULL, acpi_shutdown_poweroff, NULL, NULL); 1176 } else { 1177 printf("Shutting down ACPI\n"); 1178 AcpiTerminate(); 1179 } 1180} 1181 1182static void 1183acpi_shutdown_poweroff(void *arg) 1184{ 1185 ACPI_STATUS status; 1186 1187 ACPI_ASSERTLOCK; 1188 1189 /* Only attempt to power off if this is the BSP (cpuid 0). */ 1190 if (PCPU_GET(cpuid) != 0) 1191 return; 1192 1193 status = AcpiEnterSleepStatePrep(acpi_off_state); 1194 if (ACPI_FAILURE(status)) { 1195 printf("AcpiEnterSleepStatePrep failed - %s\n", 1196 AcpiFormatException(status)); 1197 return; 1198 } 1199 ACPI_DISABLE_IRQS(); 1200 status = AcpiEnterSleepState(acpi_off_state); 1201 if (ACPI_FAILURE(status)) { 1202 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1203 } else { 1204 DELAY(1000000); 1205 printf("ACPI power-off failed - timeout\n"); 1206 } 1207} 1208 1209static void 1210acpi_enable_fixed_events(struct acpi_softc *sc) 1211{ 1212 static int first_time = 1; 1213 1214 ACPI_ASSERTLOCK; 1215 1216 /* Enable and clear fixed events and install handlers. */ 1217 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1218 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1219 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1220 acpi_event_power_button_sleep, sc); 1221 if (first_time) 1222 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1223 } 1224 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1225 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1226 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1227 acpi_event_sleep_button_sleep, sc); 1228 if (first_time) 1229 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1230 } 1231 1232 first_time = 0; 1233} 1234 1235/* 1236 * Returns true if the device is actually present and should 1237 * be attached to. This requires the present, enabled, UI-visible 1238 * and diagnostics-passed bits to be set. 1239 */ 1240BOOLEAN 1241acpi_DeviceIsPresent(device_t dev) 1242{ 1243 ACPI_DEVICE_INFO *devinfo; 1244 ACPI_HANDLE h; 1245 ACPI_BUFFER buf; 1246 ACPI_STATUS error; 1247 int ret; 1248 1249 ACPI_ASSERTLOCK; 1250 1251 ret = FALSE; 1252 if ((h = acpi_get_handle(dev)) == NULL) 1253 return (FALSE); 1254 buf.Pointer = NULL; 1255 buf.Length = ACPI_ALLOCATE_BUFFER; 1256 error = AcpiGetObjectInfo(h, &buf); 1257 if (ACPI_FAILURE(error)) 1258 return (FALSE); 1259 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1260 1261 /* If no _STA method, must be present */ 1262 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1263 ret = TRUE; 1264 1265 /* Return true for 'present' and 'functioning' */ 1266 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1267 ret = TRUE; 1268 1269 AcpiOsFree(buf.Pointer); 1270 return (ret); 1271} 1272 1273/* 1274 * Returns true if the battery is actually present and inserted. 1275 */ 1276BOOLEAN 1277acpi_BatteryIsPresent(device_t dev) 1278{ 1279 ACPI_DEVICE_INFO *devinfo; 1280 ACPI_HANDLE h; 1281 ACPI_BUFFER buf; 1282 ACPI_STATUS error; 1283 int ret; 1284 1285 ACPI_ASSERTLOCK; 1286 1287 ret = FALSE; 1288 if ((h = acpi_get_handle(dev)) == NULL) 1289 return (FALSE); 1290 buf.Pointer = NULL; 1291 buf.Length = ACPI_ALLOCATE_BUFFER; 1292 error = AcpiGetObjectInfo(h, &buf); 1293 if (ACPI_FAILURE(error)) 1294 return (FALSE); 1295 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1296 1297 /* If no _STA method, must be present */ 1298 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1299 ret = TRUE; 1300 1301 /* Return true for 'present' and 'functioning' */ 1302 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1303 ret = TRUE; 1304 1305 AcpiOsFree(buf.Pointer); 1306 return (ret); 1307} 1308 1309/* 1310 * Match a HID string against a device 1311 */ 1312BOOLEAN 1313acpi_MatchHid(device_t dev, char *hid) 1314{ 1315 ACPI_DEVICE_INFO *devinfo; 1316 ACPI_HANDLE h; 1317 ACPI_BUFFER buf; 1318 ACPI_STATUS error; 1319 int ret, i; 1320 1321 ACPI_ASSERTLOCK; 1322 1323 ret = FALSE; 1324 if (hid == NULL) 1325 return (FALSE); 1326 if ((h = acpi_get_handle(dev)) == NULL) 1327 return (FALSE); 1328 buf.Pointer = NULL; 1329 buf.Length = ACPI_ALLOCATE_BUFFER; 1330 error = AcpiGetObjectInfo(h, &buf); 1331 if (ACPI_FAILURE(error)) 1332 return (FALSE); 1333 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1334 1335 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1336 strcmp(hid, devinfo->HardwareId.Value) == 0) 1337 ret = TRUE; 1338 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1339 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1340 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1341 ret = TRUE; 1342 break; 1343 } 1344 } 1345 } 1346 1347 AcpiOsFree(buf.Pointer); 1348 return (ret); 1349} 1350 1351/* 1352 * Return the handle of a named object within our scope, ie. that of (parent) 1353 * or one if its parents. 1354 */ 1355ACPI_STATUS 1356acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1357{ 1358 ACPI_HANDLE r; 1359 ACPI_STATUS status; 1360 1361 ACPI_ASSERTLOCK; 1362 1363 /* Walk back up the tree to the root */ 1364 for (;;) { 1365 status = AcpiGetHandle(parent, path, &r); 1366 if (ACPI_SUCCESS(status)) { 1367 *result = r; 1368 return (AE_OK); 1369 } 1370 if (status != AE_NOT_FOUND) 1371 return (AE_OK); 1372 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1373 return (AE_NOT_FOUND); 1374 parent = r; 1375 } 1376} 1377 1378/* 1379 * Allocate a buffer with a preset data size. 1380 */ 1381ACPI_BUFFER * 1382acpi_AllocBuffer(int size) 1383{ 1384 ACPI_BUFFER *buf; 1385 1386 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1387 return (NULL); 1388 buf->Length = size; 1389 buf->Pointer = (void *)(buf + 1); 1390 return (buf); 1391} 1392 1393ACPI_STATUS 1394acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1395{ 1396 ACPI_OBJECT arg1; 1397 ACPI_OBJECT_LIST args; 1398 1399 ACPI_ASSERTLOCK; 1400 1401 arg1.Type = ACPI_TYPE_INTEGER; 1402 arg1.Integer.Value = number; 1403 args.Count = 1; 1404 args.Pointer = &arg1; 1405 1406 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1407} 1408 1409/* 1410 * Evaluate a path that should return an integer. 1411 */ 1412ACPI_STATUS 1413acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1414{ 1415 ACPI_STATUS status; 1416 ACPI_BUFFER buf; 1417 ACPI_OBJECT param; 1418 1419 ACPI_ASSERTLOCK; 1420 1421 if (handle == NULL) 1422 handle = ACPI_ROOT_OBJECT; 1423 1424 /* 1425 * Assume that what we've been pointed at is an Integer object, or 1426 * a method that will return an Integer. 1427 */ 1428 buf.Pointer = ¶m; 1429 buf.Length = sizeof(param); 1430 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1431 if (ACPI_SUCCESS(status)) { 1432 if (param.Type == ACPI_TYPE_INTEGER) 1433 *number = param.Integer.Value; 1434 else 1435 status = AE_TYPE; 1436 } 1437 1438 /* 1439 * In some applications, a method that's expected to return an Integer 1440 * may instead return a Buffer (probably to simplify some internal 1441 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1442 * convert it into an Integer as best we can. 1443 * 1444 * This is a hack. 1445 */ 1446 if (status == AE_BUFFER_OVERFLOW) { 1447 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1448 status = AE_NO_MEMORY; 1449 } else { 1450 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1451 if (ACPI_SUCCESS(status)) 1452 status = acpi_ConvertBufferToInteger(&buf, number); 1453 AcpiOsFree(buf.Pointer); 1454 } 1455 } 1456 return (status); 1457} 1458 1459ACPI_STATUS 1460acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1461{ 1462 ACPI_OBJECT *p; 1463 UINT8 *val; 1464 int i; 1465 1466 p = (ACPI_OBJECT *)bufp->Pointer; 1467 if (p->Type == ACPI_TYPE_INTEGER) { 1468 *number = p->Integer.Value; 1469 return (AE_OK); 1470 } 1471 if (p->Type != ACPI_TYPE_BUFFER) 1472 return (AE_TYPE); 1473 if (p->Buffer.Length > sizeof(int)) 1474 return (AE_BAD_DATA); 1475 1476 *number = 0; 1477 val = p->Buffer.Pointer; 1478 for (i = 0; i < p->Buffer.Length; i++) 1479 *number += val[i] << (i * 8); 1480 return (AE_OK); 1481} 1482 1483/* 1484 * Iterate over the elements of an a package object, calling the supplied 1485 * function for each element. 1486 * 1487 * XXX possible enhancement might be to abort traversal on error. 1488 */ 1489ACPI_STATUS 1490acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1491 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1492{ 1493 ACPI_OBJECT *comp; 1494 int i; 1495 1496 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1497 return (AE_BAD_PARAMETER); 1498 1499 /* Iterate over components */ 1500 i = 0; 1501 comp = pkg->Package.Elements; 1502 for (; i < pkg->Package.Count; i++, comp++) 1503 func(comp, arg); 1504 1505 return (AE_OK); 1506} 1507 1508/* 1509 * Find the (index)th resource object in a set. 1510 */ 1511ACPI_STATUS 1512acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1513{ 1514 ACPI_RESOURCE *rp; 1515 int i; 1516 1517 rp = (ACPI_RESOURCE *)buf->Pointer; 1518 i = index; 1519 while (i-- > 0) { 1520 /* Range check */ 1521 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1522 return (AE_BAD_PARAMETER); 1523 1524 /* Check for terminator */ 1525 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1526 return (AE_NOT_FOUND); 1527 rp = ACPI_NEXT_RESOURCE(rp); 1528 } 1529 if (resp != NULL) 1530 *resp = rp; 1531 1532 return (AE_OK); 1533} 1534 1535/* 1536 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1537 * 1538 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1539 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1540 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1541 * resources. 1542 */ 1543#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1544 1545ACPI_STATUS 1546acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1547{ 1548 ACPI_RESOURCE *rp; 1549 void *newp; 1550 1551 /* Initialise the buffer if necessary. */ 1552 if (buf->Pointer == NULL) { 1553 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1554 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1555 return (AE_NO_MEMORY); 1556 rp = (ACPI_RESOURCE *)buf->Pointer; 1557 rp->Id = ACPI_RSTYPE_END_TAG; 1558 rp->Length = 0; 1559 } 1560 if (res == NULL) 1561 return (AE_OK); 1562 1563 /* 1564 * Scan the current buffer looking for the terminator. 1565 * This will either find the terminator or hit the end 1566 * of the buffer and return an error. 1567 */ 1568 rp = (ACPI_RESOURCE *)buf->Pointer; 1569 for (;;) { 1570 /* Range check, don't go outside the buffer */ 1571 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1572 return (AE_BAD_PARAMETER); 1573 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1574 break; 1575 rp = ACPI_NEXT_RESOURCE(rp); 1576 } 1577 1578 /* 1579 * Check the size of the buffer and expand if required. 1580 * 1581 * Required size is: 1582 * size of existing resources before terminator + 1583 * size of new resource and header + 1584 * size of terminator. 1585 * 1586 * Note that this loop should really only run once, unless 1587 * for some reason we are stuffing a *really* huge resource. 1588 */ 1589 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1590 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1591 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1592 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1593 return (AE_NO_MEMORY); 1594 bcopy(buf->Pointer, newp, buf->Length); 1595 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1596 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1597 AcpiOsFree(buf->Pointer); 1598 buf->Pointer = newp; 1599 buf->Length += buf->Length; 1600 } 1601 1602 /* Insert the new resource. */ 1603 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1604 1605 /* And add the terminator. */ 1606 rp = ACPI_NEXT_RESOURCE(rp); 1607 rp->Id = ACPI_RSTYPE_END_TAG; 1608 rp->Length = 0; 1609 1610 return (AE_OK); 1611} 1612 1613/* 1614 * Set interrupt model. 1615 */ 1616ACPI_STATUS 1617acpi_SetIntrModel(int model) 1618{ 1619 1620 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1621} 1622 1623#define ACPI_MINIMUM_AWAKETIME 5 1624 1625static void 1626acpi_sleep_enable(void *arg) 1627{ 1628 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1629} 1630 1631/* 1632 * Set the system sleep state 1633 * 1634 * Currently we support S1-S5 but S4 is only S4BIOS 1635 */ 1636ACPI_STATUS 1637acpi_SetSleepState(struct acpi_softc *sc, int state) 1638{ 1639 ACPI_STATUS status = AE_OK; 1640 UINT8 TypeA; 1641 UINT8 TypeB; 1642 1643 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1644 ACPI_ASSERTLOCK; 1645 1646 /* Avoid reentry if already attempting to suspend. */ 1647 if (sc->acpi_sstate != ACPI_STATE_S0) 1648 return_ACPI_STATUS (AE_BAD_PARAMETER); 1649 1650 /* We recently woke up so don't suspend again for a while. */ 1651 if (sc->acpi_sleep_disabled) 1652 return_ACPI_STATUS (AE_OK); 1653 1654 switch (state) { 1655 case ACPI_STATE_S1: 1656 case ACPI_STATE_S2: 1657 case ACPI_STATE_S3: 1658 case ACPI_STATE_S4: 1659 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1660 if (status == AE_NOT_FOUND) { 1661 device_printf(sc->acpi_dev, 1662 "Sleep state S%d not supported by BIOS\n", state); 1663 break; 1664 } else if (ACPI_FAILURE(status)) { 1665 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1666 AcpiFormatException(status)); 1667 break; 1668 } 1669 1670 sc->acpi_sstate = state; 1671 sc->acpi_sleep_disabled = 1; 1672 1673 /* Inform all devices that we are going to sleep. */ 1674 if (DEVICE_SUSPEND(root_bus) != 0) { 1675 /* 1676 * Re-wake the system. 1677 * 1678 * XXX note that a better two-pass approach with a 'veto' pass 1679 * followed by a "real thing" pass would be better, but the 1680 * current bus interface does not provide for this. 1681 */ 1682 DEVICE_RESUME(root_bus); 1683 return_ACPI_STATUS (AE_ERROR); 1684 } 1685 1686 status = AcpiEnterSleepStatePrep(state); 1687 if (ACPI_FAILURE(status)) { 1688 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1689 AcpiFormatException(status)); 1690 break; 1691 } 1692 1693 if (sc->acpi_sleep_delay > 0) 1694 DELAY(sc->acpi_sleep_delay * 1000000); 1695 1696 if (state != ACPI_STATE_S1) { 1697 acpi_sleep_machdep(sc, state); 1698 1699 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1700 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1701 ACPI_MUTEX_NOT_ACQUIRED) { 1702 1703 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1704 } 1705 1706 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1707 if (state == ACPI_STATE_S4) 1708 AcpiEnable(); 1709 } else { 1710 status = AcpiEnterSleepState((UINT8)state); 1711 if (ACPI_FAILURE(status)) { 1712 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1713 AcpiFormatException(status)); 1714 break; 1715 } 1716 } 1717 AcpiLeaveSleepState((UINT8)state); 1718 DEVICE_RESUME(root_bus); 1719 sc->acpi_sstate = ACPI_STATE_S0; 1720 acpi_enable_fixed_events(sc); 1721 break; 1722 case ACPI_STATE_S5: 1723 /* 1724 * Shut down cleanly and power off. This will call us back through the 1725 * shutdown handlers. 1726 */ 1727 shutdown_nice(RB_POWEROFF); 1728 break; 1729 case ACPI_STATE_S0: 1730 default: 1731 status = AE_BAD_PARAMETER; 1732 break; 1733 } 1734 1735 /* Disable a second sleep request for a short period */ 1736 if (sc->acpi_sleep_disabled) 1737 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1738 1739 return_ACPI_STATUS (status); 1740} 1741 1742/* 1743 * Enable/Disable ACPI 1744 */ 1745ACPI_STATUS 1746acpi_Enable(struct acpi_softc *sc) 1747{ 1748 ACPI_STATUS status; 1749 u_int32_t flags; 1750 1751 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1752 ACPI_ASSERTLOCK; 1753 1754 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1755 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1756 if (!sc->acpi_enabled) 1757 status = AcpiEnableSubsystem(flags); 1758 else 1759 status = AE_OK; 1760 1761 if (status == AE_OK) 1762 sc->acpi_enabled = 1; 1763 1764 return_ACPI_STATUS (status); 1765} 1766 1767ACPI_STATUS 1768acpi_Disable(struct acpi_softc *sc) 1769{ 1770 ACPI_STATUS status; 1771 1772 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1773 ACPI_ASSERTLOCK; 1774 1775 if (sc->acpi_enabled) 1776 status = AcpiDisable(); 1777 else 1778 status = AE_OK; 1779 1780 if (status == AE_OK) 1781 sc->acpi_enabled = 0; 1782 1783 return_ACPI_STATUS (status); 1784} 1785 1786/* 1787 * ACPI Event Handlers 1788 */ 1789 1790/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1791 1792static void 1793acpi_system_eventhandler_sleep(void *arg, int state) 1794{ 1795 ACPI_LOCK_DECL; 1796 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1797 1798 ACPI_LOCK; 1799 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1800 acpi_SetSleepState((struct acpi_softc *)arg, state); 1801 ACPI_UNLOCK; 1802 return_VOID; 1803} 1804 1805static void 1806acpi_system_eventhandler_wakeup(void *arg, int state) 1807{ 1808 ACPI_LOCK_DECL; 1809 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1810 1811 /* Well, what to do? :-) */ 1812 1813 ACPI_LOCK; 1814 ACPI_UNLOCK; 1815 1816 return_VOID; 1817} 1818 1819/* 1820 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1821 */ 1822UINT32 1823acpi_event_power_button_sleep(void *context) 1824{ 1825 struct acpi_softc *sc = (struct acpi_softc *)context; 1826 1827 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1828 1829 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1830 1831 return_VALUE (ACPI_INTERRUPT_HANDLED); 1832} 1833 1834UINT32 1835acpi_event_power_button_wake(void *context) 1836{ 1837 struct acpi_softc *sc = (struct acpi_softc *)context; 1838 1839 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1840 1841 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1842 1843 return_VALUE (ACPI_INTERRUPT_HANDLED); 1844} 1845 1846UINT32 1847acpi_event_sleep_button_sleep(void *context) 1848{ 1849 struct acpi_softc *sc = (struct acpi_softc *)context; 1850 1851 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1852 1853 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1854 1855 return_VALUE (ACPI_INTERRUPT_HANDLED); 1856} 1857 1858UINT32 1859acpi_event_sleep_button_wake(void *context) 1860{ 1861 struct acpi_softc *sc = (struct acpi_softc *)context; 1862 1863 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1864 1865 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1866 1867 return_VALUE (ACPI_INTERRUPT_HANDLED); 1868} 1869 1870/* 1871 * XXX This is kinda ugly, and should not be here. 1872 */ 1873struct acpi_staticbuf { 1874 ACPI_BUFFER buffer; 1875 char data[512]; 1876}; 1877 1878char * 1879acpi_name(ACPI_HANDLE handle) 1880{ 1881 static struct acpi_staticbuf buf; 1882 1883 ACPI_ASSERTLOCK; 1884 1885 buf.buffer.Length = 512; 1886 buf.buffer.Pointer = &buf.data[0]; 1887 1888 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1889 return (buf.buffer.Pointer); 1890 1891 return ("(unknown path)"); 1892} 1893 1894/* 1895 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1896 * parts of the namespace. 1897 */ 1898int 1899acpi_avoid(ACPI_HANDLE handle) 1900{ 1901 char *cp, *env, *np; 1902 int len; 1903 1904 np = acpi_name(handle); 1905 if (*np == '\\') 1906 np++; 1907 if ((env = getenv("debug.acpi.avoid")) == NULL) 1908 return (0); 1909 1910 /* Scan the avoid list checking for a match */ 1911 cp = env; 1912 for (;;) { 1913 while ((*cp != 0) && isspace(*cp)) 1914 cp++; 1915 if (*cp == 0) 1916 break; 1917 len = 0; 1918 while ((cp[len] != 0) && !isspace(cp[len])) 1919 len++; 1920 if (!strncmp(cp, np, len)) { 1921 freeenv(env); 1922 return(1); 1923 } 1924 cp += len; 1925 } 1926 freeenv(env); 1927 1928 return (0); 1929} 1930 1931/* 1932 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1933 */ 1934int 1935acpi_disabled(char *subsys) 1936{ 1937 char *cp, *env; 1938 int len; 1939 1940 if ((env = getenv("debug.acpi.disabled")) == NULL) 1941 return (0); 1942 if (strcmp(env, "all") == 0) { 1943 freeenv(env); 1944 return (1); 1945 } 1946 1947 /* Scan the disable list, checking for a match. */ 1948 cp = env; 1949 for (;;) { 1950 while (*cp != '\0' && isspace(*cp)) 1951 cp++; 1952 if (*cp == '\0') 1953 break; 1954 len = 0; 1955 while (cp[len] != '\0' && !isspace(cp[len])) 1956 len++; 1957 if (strncmp(cp, subsys, len) == 0) { 1958 freeenv(env); 1959 return (1); 1960 } 1961 cp += len; 1962 } 1963 freeenv(env); 1964 1965 return (0); 1966} 1967 1968/* 1969 * Device wake capability enable/disable. 1970 */ 1971void 1972acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1973{ 1974 /* 1975 * TBD: All Power Resources referenced by elements 2 through N 1976 * of the _PRW object are put into the ON state. 1977 */ 1978 1979 (void)acpi_SetInteger(h, "_PSW", enable); 1980} 1981 1982void 1983acpi_device_enable_wake_event(ACPI_HANDLE h) 1984{ 1985 struct acpi_softc *sc; 1986 uint32_t gpe_bit, lowest_wake; 1987 ACPI_HANDLE handle; 1988 ACPI_STATUS status; 1989 ACPI_BUFFER prw_buffer; 1990 ACPI_OBJECT *res, *res2; 1991 1992 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1993 1994 sc = devclass_get_softc(acpi_devclass, 0); 1995 if (sc == NULL) 1996 return; 1997 1998 /* 1999 * The _PRW object (7.2.9) is only required for devices that have the 2000 * ability to wake the system from a sleeping state. 2001 */ 2002 prw_buffer.Pointer = NULL; 2003 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2004 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2005 if (ACPI_FAILURE(status)) 2006 return; 2007 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2008 if (res == NULL) 2009 return; 2010 if (!ACPI_PKG_VALID(res, 2)) 2011 goto out; 2012 2013 /* 2014 * Element 1 of the _PRW object: 2015 * The lowest power system sleeping state that can be entered while still 2016 * providing wake functionality. The sleeping state being entered must 2017 * be less than (i.e., higher power) or equal to this value. 2018 */ 2019 if (acpi_PkgInt32(res, 1, &lowest_wake) != 0) 2020 goto out; 2021 if (sc->acpi_sstate > lowest_wake) 2022 goto out; 2023 2024 /* 2025 * Element 0 of the _PRW object: 2026 */ 2027 switch (res->Package.Elements[0].Type) { 2028 case ACPI_TYPE_INTEGER: 2029 /* 2030 * If the data type of this package element is numeric, then this 2031 * _PRW package element is the bit index in the GPEx_EN, in the 2032 * GPE blocks described in the FADT, of the enable bit that is 2033 * enabled for the wake event. 2034 */ 2035 gpe_bit = res->Package.Elements[0].Integer.Value; 2036 status = AcpiEnableGpe(NULL, gpe_bit, ACPI_EVENT_WAKE_ENABLE); 2037 if (ACPI_FAILURE(status)) 2038 printf("wake enable: AcpiEnableGpe failed for %u\n", 2039 gpe_bit); 2040 break; 2041 case ACPI_TYPE_PACKAGE: 2042 /* 2043 * If the data type of this package element is a package, then this 2044 * _PRW package element is itself a package containing two 2045 * elements. The first is an object reference to the GPE Block 2046 * device that contains the GPE that will be triggered by the wake 2047 * event. The second element is numeric and it contains the bit 2048 * index in the GPEx_EN, in the GPE Block referenced by the 2049 * first element in the package, of the enable bit that is enabled for 2050 * the wake event. 2051 * 2052 * For example, if this field is a package then it is of the form: 2053 * Package() {\_SB.PCI0.ISA.GPE, 2} 2054 */ 2055 res2 = &res->Package.Elements[0]; 2056 if (!ACPI_PKG_VALID(res2, 2)) 2057 goto out; 2058 handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2059 if (handle == NULL || acpi_PkgInt32(res2, 1, &gpe_bit) != 0) 2060 goto out; 2061 status = AcpiEnableGpe(handle, gpe_bit, ACPI_EVENT_WAKE_ENABLE); 2062 if (ACPI_FAILURE(status)) 2063 printf("wake enable: AcpiEnableGpe (package) failed for %u\n", 2064 gpe_bit); 2065 break; 2066 default: 2067 break; 2068 } 2069 2070out: 2071 if (prw_buffer.Pointer != NULL) 2072 AcpiOsFree(prw_buffer.Pointer); 2073} 2074 2075/* 2076 * Control interface. 2077 * 2078 * We multiplex ioctls for all participating ACPI devices here. Individual 2079 * drivers wanting to be accessible via /dev/acpi should use the 2080 * register/deregister interface to make their handlers visible. 2081 */ 2082struct acpi_ioctl_hook 2083{ 2084 TAILQ_ENTRY(acpi_ioctl_hook) link; 2085 u_long cmd; 2086 acpi_ioctl_fn fn; 2087 void *arg; 2088}; 2089 2090static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2091static int acpi_ioctl_hooks_initted; 2092 2093/* 2094 * Register an ioctl handler. 2095 */ 2096int 2097acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2098{ 2099 struct acpi_ioctl_hook *hp; 2100 2101 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2102 return (ENOMEM); 2103 hp->cmd = cmd; 2104 hp->fn = fn; 2105 hp->arg = arg; 2106 if (acpi_ioctl_hooks_initted == 0) { 2107 TAILQ_INIT(&acpi_ioctl_hooks); 2108 acpi_ioctl_hooks_initted = 1; 2109 } 2110 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2111 return (0); 2112} 2113 2114/* 2115 * Deregister an ioctl handler. 2116 */ 2117void 2118acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2119{ 2120 struct acpi_ioctl_hook *hp; 2121 2122 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2123 if ((hp->cmd == cmd) && (hp->fn == fn)) 2124 break; 2125 2126 if (hp != NULL) { 2127 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2128 free(hp, M_ACPIDEV); 2129 } 2130} 2131 2132static int 2133acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2134{ 2135 return (0); 2136} 2137 2138static int 2139acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2140{ 2141 return (0); 2142} 2143 2144static int 2145acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2146{ 2147 struct acpi_softc *sc; 2148 struct acpi_ioctl_hook *hp; 2149 int error, xerror, state; 2150 ACPI_LOCK_DECL; 2151 2152 ACPI_LOCK; 2153 2154 error = state = 0; 2155 sc = dev->si_drv1; 2156 2157 /* 2158 * Scan the list of registered ioctls, looking for handlers. 2159 */ 2160 if (acpi_ioctl_hooks_initted) { 2161 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2162 if (hp->cmd == cmd) { 2163 xerror = hp->fn(cmd, addr, hp->arg); 2164 if (xerror != 0) 2165 error = xerror; 2166 goto out; 2167 } 2168 } 2169 } 2170 2171 /* 2172 * Core ioctls are not permitted for non-writable user. 2173 * Currently, other ioctls just fetch information. 2174 * Not changing system behavior. 2175 */ 2176 if((flag & FWRITE) == 0) 2177 return (EPERM); 2178 2179 /* Core system ioctls. */ 2180 switch (cmd) { 2181 case ACPIIO_ENABLE: 2182 if (ACPI_FAILURE(acpi_Enable(sc))) 2183 error = ENXIO; 2184 break; 2185 case ACPIIO_DISABLE: 2186 if (ACPI_FAILURE(acpi_Disable(sc))) 2187 error = ENXIO; 2188 break; 2189 case ACPIIO_SETSLPSTATE: 2190 if (!sc->acpi_enabled) { 2191 error = ENXIO; 2192 break; 2193 } 2194 state = *(int *)addr; 2195 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2196 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2197 error = EINVAL; 2198 } else { 2199 error = EINVAL; 2200 } 2201 break; 2202 default: 2203 if (error == 0) 2204 error = EINVAL; 2205 break; 2206 } 2207 2208out: 2209 ACPI_UNLOCK; 2210 return (error); 2211} 2212 2213static int 2214acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2215{ 2216 char sleep_state[4]; 2217 char buf[16]; 2218 int error; 2219 UINT8 state, TypeA, TypeB; 2220 2221 buf[0] = '\0'; 2222 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 2223 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2224 sprintf(sleep_state, "S%d ", state); 2225 strcat(buf, sleep_state); 2226 } 2227 } 2228 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2229 return (error); 2230} 2231 2232static int 2233acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2234{ 2235 char sleep_state[10]; 2236 int error; 2237 u_int new_state, old_state; 2238 2239 old_state = *(u_int *)oidp->oid_arg1; 2240 if (old_state > ACPI_S_STATES_MAX+1) { 2241 strcpy(sleep_state, "unknown"); 2242 } else { 2243 bzero(sleep_state, sizeof(sleep_state)); 2244 strncpy(sleep_state, sleep_state_names[old_state], 2245 sizeof(sleep_state_names[old_state])); 2246 } 2247 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2248 if (error == 0 && req->newptr != NULL) { 2249 new_state = ACPI_STATE_S0; 2250 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2251 if (strncmp(sleep_state, sleep_state_names[new_state], 2252 sizeof(sleep_state)) == 0) 2253 break; 2254 } 2255 if (new_state <= ACPI_S_STATES_MAX + 1) { 2256 if (new_state != old_state) 2257 *(u_int *)oidp->oid_arg1 = new_state; 2258 } else { 2259 error = EINVAL; 2260 } 2261 } 2262 2263 return (error); 2264} 2265 2266/* Inform devctl(4) when we receive a Notify. */ 2267void 2268acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2269{ 2270 char notify_buf[16]; 2271 ACPI_BUFFER handle_buf; 2272 ACPI_STATUS status; 2273 2274 if (subsystem == NULL) 2275 return; 2276 2277 handle_buf.Pointer = NULL; 2278 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2279 status = AcpiNsHandleToPathname(h, &handle_buf); 2280 if (ACPI_FAILURE(status)) 2281 return; 2282 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2283 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2284 AcpiOsFree(handle_buf.Pointer); 2285} 2286 2287#ifdef ACPI_DEBUG 2288/* 2289 * Support for parsing debug options from the kernel environment. 2290 * 2291 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2292 * by specifying the names of the bits in the debug.acpi.layer and 2293 * debug.acpi.level environment variables. Bits may be unset by 2294 * prefixing the bit name with !. 2295 */ 2296struct debugtag 2297{ 2298 char *name; 2299 UINT32 value; 2300}; 2301 2302static struct debugtag dbg_layer[] = { 2303 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2304 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2305 {"ACPI_EVENTS", ACPI_EVENTS}, 2306 {"ACPI_TABLES", ACPI_TABLES}, 2307 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2308 {"ACPI_PARSER", ACPI_PARSER}, 2309 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2310 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2311 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2312 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2313 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2314 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2315 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2316 2317 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2318 {"ACPI_BATTERY", ACPI_BATTERY}, 2319 {"ACPI_BUS", ACPI_BUS}, 2320 {"ACPI_BUTTON", ACPI_BUTTON}, 2321 {"ACPI_EC", ACPI_EC}, 2322 {"ACPI_FAN", ACPI_FAN}, 2323 {"ACPI_POWERRES", ACPI_POWERRES}, 2324 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2325 {"ACPI_THERMAL", ACPI_THERMAL}, 2326 {"ACPI_TIMER", ACPI_TIMER}, 2327 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2328 {NULL, 0} 2329}; 2330 2331static struct debugtag dbg_level[] = { 2332 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2333 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2334 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2335 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2336 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2337 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2338 2339 /* Trace verbosity level 1 [Standard Trace Level] */ 2340 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2341 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2342 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2343 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2344 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2345 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2346 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2347 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2348 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2349 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2350 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2351 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2352 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2353 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2354 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2355 2356 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2357 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2358 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2359 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2360 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2361 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2362 2363 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2364 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2365 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2366 {"ACPI_LV_IO", ACPI_LV_IO}, 2367 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2368 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2369 2370 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2371 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2372 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2373 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2374 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2375 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2376 {NULL, 0} 2377}; 2378 2379static void 2380acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2381{ 2382 char *ep; 2383 int i, l; 2384 int set; 2385 2386 while (*cp) { 2387 if (isspace(*cp)) { 2388 cp++; 2389 continue; 2390 } 2391 ep = cp; 2392 while (*ep && !isspace(*ep)) 2393 ep++; 2394 if (*cp == '!') { 2395 set = 0; 2396 cp++; 2397 if (cp == ep) 2398 continue; 2399 } else { 2400 set = 1; 2401 } 2402 l = ep - cp; 2403 for (i = 0; tag[i].name != NULL; i++) { 2404 if (!strncmp(cp, tag[i].name, l)) { 2405 if (set) 2406 *flag |= tag[i].value; 2407 else 2408 *flag &= ~tag[i].value; 2409 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2410 } 2411 } 2412 cp = ep; 2413 } 2414} 2415 2416static void 2417acpi_set_debugging(void *junk) 2418{ 2419 char *cp; 2420 2421 if (cold) { 2422 AcpiDbgLayer = 0; 2423 AcpiDbgLevel = 0; 2424 } 2425 2426 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2427 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2428 freeenv(cp); 2429 } 2430 if ((cp = getenv("debug.acpi.level")) != NULL) { 2431 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2432 freeenv(cp); 2433 } 2434 2435 if (cold) { 2436 printf("ACPI debug layer 0x%x debug level 0x%x\n", 2437 AcpiDbgLayer, AcpiDbgLevel); 2438 } 2439} 2440SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2441 NULL); 2442 2443static int 2444acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2445{ 2446 int error, *dbg; 2447 struct debugtag *tag; 2448 struct sbuf sb; 2449 2450 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2451 return (ENOMEM); 2452 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2453 tag = &dbg_layer[0]; 2454 dbg = &AcpiDbgLayer; 2455 } else { 2456 tag = &dbg_level[0]; 2457 dbg = &AcpiDbgLevel; 2458 } 2459 2460 /* Get old values if this is a get request. */ 2461 if (*dbg == 0) { 2462 sbuf_cpy(&sb, "NONE"); 2463 } else if (req->newptr == NULL) { 2464 for (; tag->name != NULL; tag++) { 2465 if ((*dbg & tag->value) == tag->value) 2466 sbuf_printf(&sb, "%s ", tag->name); 2467 } 2468 } 2469 sbuf_trim(&sb); 2470 sbuf_finish(&sb); 2471 2472 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2473 sbuf_delete(&sb); 2474 2475 /* If the user is setting a string, parse it. */ 2476 if (error == 0 && req->newptr != NULL) { 2477 *dbg = 0; 2478 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2479 acpi_set_debugging(NULL); 2480 } 2481 2482 return (error); 2483} 2484SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2485 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2486SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2487 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2488#endif 2489 2490static int 2491acpi_pm_func(u_long cmd, void *arg, ...) 2492{ 2493 int state, acpi_state; 2494 int error; 2495 struct acpi_softc *sc; 2496 va_list ap; 2497 2498 error = 0; 2499 switch (cmd) { 2500 case POWER_CMD_SUSPEND: 2501 sc = (struct acpi_softc *)arg; 2502 if (sc == NULL) { 2503 error = EINVAL; 2504 goto out; 2505 } 2506 2507 va_start(ap, arg); 2508 state = va_arg(ap, int); 2509 va_end(ap); 2510 2511 switch (state) { 2512 case POWER_SLEEP_STATE_STANDBY: 2513 acpi_state = sc->acpi_standby_sx; 2514 break; 2515 case POWER_SLEEP_STATE_SUSPEND: 2516 acpi_state = sc->acpi_suspend_sx; 2517 break; 2518 case POWER_SLEEP_STATE_HIBERNATE: 2519 acpi_state = ACPI_STATE_S4; 2520 break; 2521 default: 2522 error = EINVAL; 2523 goto out; 2524 } 2525 2526 acpi_SetSleepState(sc, acpi_state); 2527 break; 2528 default: 2529 error = EINVAL; 2530 goto out; 2531 } 2532 2533out: 2534 return (error); 2535} 2536 2537static void 2538acpi_pm_register(void *arg) 2539{ 2540 if (!cold || resource_disabled("acpi", 0)) 2541 return; 2542 2543 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2544} 2545 2546SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2547