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/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/ioccom.h> 42 #include <sys/reboot.h> 43 #include <sys/sysctl.h> 44 #include <sys/ctype.h> 45 #include <sys/linker.h> 46 #include <sys/power.h> 47 48 #include <machine/clock.h> 49 #include <machine/resource.h> 50 51 #include <isa/isavar.h> 52 53 #include "acpi.h" 54 55 #include <dev/acpica/acpica_support.h> 56 57 #include <dev/acpica/acpivar.h> 58 #include <dev/acpica/acpiio.h> 59 60 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 61 62 /* 63 * Hooks for the ACPI CA debugging infrastructure 64 */ 65 #define _COMPONENT ACPI_BUS 66 ACPI_MODULE_NAME("ACPI") 67 68 /* 69 * Character device 70 */ 71 72 static d_open_t acpiopen; 73 static d_close_t acpiclose; 74 static d_ioctl_t acpiioctl; 75 76 #define CDEV_MAJOR 152 77 static struct cdevsw acpi_cdevsw = { 78 acpiopen, 79 acpiclose, 80 noread, 81 nowrite, 82 acpiioctl, 83 nopoll, 84 nommap, 85 nostrategy, 86 "acpi", 87 CDEV_MAJOR, 88 nodump, 89 nopsize, 90 0 91 }; 92 93 static const char* sleep_state_names[] = { 94 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 95 96 /* this has to be static, as the softc is gone when we need it */ 97 static int acpi_off_state = ACPI_STATE_S5; 98 99 struct mtx acpi_mutex; 100 101 static int acpi_modevent(struct module *mod, int event, void *junk); 102 static void acpi_identify(driver_t *driver, device_t parent); 103 static int acpi_probe(device_t dev); 104 static int acpi_attach(device_t dev); 105 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 106 static int acpi_print_resources(struct resource_list *rl, const char *name, int type, 107 const char *format); 108 static int acpi_print_child(device_t bus, device_t child); 109 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 110 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 111 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 112 u_long count); 113 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 114 u_long *countp); 115 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 116 u_long start, u_long end, u_long count, u_int flags); 117 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 118 static u_int32_t acpi_isa_get_logicalid(device_t dev); 119 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 120 121 static void acpi_probe_children(device_t bus); 122 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 123 124 static void acpi_shutdown_pre_sync(void *arg, int howto); 125 static void acpi_shutdown_final(void *arg, int howto); 126 127 static void acpi_enable_fixed_events(struct acpi_softc *sc); 128 129 static void acpi_system_eventhandler_sleep(void *arg, int state); 130 static void acpi_system_eventhandler_wakeup(void *arg, int state); 131 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 132 133 static int acpi_pm_func(u_long cmd, void *arg, ...); 134 135 static device_method_t acpi_methods[] = { 136 /* Device interface */ 137 DEVMETHOD(device_identify, acpi_identify), 138 DEVMETHOD(device_probe, acpi_probe), 139 DEVMETHOD(device_attach, acpi_attach), 140 DEVMETHOD(device_shutdown, bus_generic_shutdown), 141 DEVMETHOD(device_suspend, bus_generic_suspend), 142 DEVMETHOD(device_resume, bus_generic_resume), 143 144 /* Bus interface */ 145 DEVMETHOD(bus_add_child, acpi_add_child), 146 DEVMETHOD(bus_print_child, acpi_print_child), 147 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 148 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 149 DEVMETHOD(bus_set_resource, acpi_set_resource), 150 DEVMETHOD(bus_get_resource, acpi_get_resource), 151 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 152 DEVMETHOD(bus_release_resource, acpi_release_resource), 153 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 154 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 155 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 156 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 157 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 158 159 /* ISA emulation */ 160 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 161 162 {0, 0} 163 }; 164 165 static driver_t acpi_driver = { 166 "acpi", 167 acpi_methods, 168 sizeof(struct acpi_softc), 169 }; 170 171 static devclass_t acpi_devclass; 172 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 173 MODULE_VERSION(acpi, 100); 174 175 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 176 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 177 static int acpi_ca_version = ACPI_CA_VERSION; 178 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 179 180 /* 181 * ACPI can only be loaded as a module by the loader; activating it after 182 * system bootstrap time is not useful, and can be fatal to the system. 183 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 184 */ 185 static int 186 acpi_modevent(struct module *mod, int event, void *junk) 187 { 188 switch(event) { 189 case MOD_LOAD: 190 if (!cold) 191 return(EPERM); 192 break; 193 case MOD_UNLOAD: 194 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 195 return(EBUSY); 196 break; 197 default: 198 break; 199 } 200 return(0); 201 } 202 203 /* 204 * Detect ACPI, perform early initialisation 205 */ 206 static void 207 acpi_identify(driver_t *driver, device_t parent) 208 { 209 device_t child; 210 int error; 211 caddr_t acpi_dsdt, p; 212 #ifdef ENABLE_DEBUGGER 213 char *debugpoint = getenv("debug.acpi.debugger"); 214 #endif 215 216 ACPI_FUNCTION_TRACE(__func__); 217 218 if(!cold){ 219 printf("Don't load this driver from userland!!\n"); 220 return ; 221 } 222 223 /* 224 * Check that we haven't been disabled with a hint. 225 */ 226 if (!resource_int_value("acpi", 0, "disabled", &error) && 227 (error != 0)) 228 return_VOID; 229 230 /* 231 * Make sure we're not being doubly invoked. 232 */ 233 if (device_find_child(parent, "acpi", 0) != NULL) 234 return_VOID; 235 236 /* initialise the ACPI mutex */ 237 mtx_init(&acpi_mutex, "ACPI global lock", MTX_DEF); 238 239 /* 240 * Start up the ACPI CA subsystem. 241 */ 242 #ifdef ENABLE_DEBUGGER 243 if (debugpoint && !strcmp(debugpoint, "init")) 244 acpi_EnterDebugger(); 245 #endif 246 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 247 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 248 return_VOID; 249 } 250 #ifdef ENABLE_DEBUGGER 251 if (debugpoint && !strcmp(debugpoint, "tables")) 252 acpi_EnterDebugger(); 253 #endif 254 255 if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) != NULL) { 256 if ((p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) != NULL) { 257 if (ACPI_FAILURE(error = AcpiSetDsdtTablePtr(*(void **)p))) { 258 printf("ACPI: DSDT overriding failed: %s\n", 259 AcpiFormatException(error)); 260 } else { 261 printf("ACPI: DSDT was overridden.\n"); 262 } 263 } 264 } 265 266 if (ACPI_FAILURE(error = AcpiLoadTables())) { 267 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 268 return_VOID; 269 } 270 271 /* 272 * Attach the actual ACPI device. 273 */ 274 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 275 device_printf(parent, "ACPI: could not attach\n"); 276 return_VOID; 277 } 278 } 279 280 /* 281 * Fetch some descriptive data from ACPI to put in our attach message 282 */ 283 static int 284 acpi_probe(device_t dev) 285 { 286 ACPI_TABLE_HEADER th; 287 char buf[20]; 288 ACPI_STATUS status; 289 int error; 290 291 ACPI_FUNCTION_TRACE(__func__); 292 293 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 294 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 295 device_printf(dev, "Other PM system enabled.\n"); 296 return_VALUE(ENXIO); 297 } 298 299 ACPI_LOCK; 300 301 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 302 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 303 error = ENXIO; 304 } else { 305 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 306 device_set_desc_copy(dev, buf); 307 error = 0; 308 } 309 ACPI_UNLOCK; 310 return_VALUE(error); 311 } 312 313 static int 314 acpi_attach(device_t dev) 315 { 316 struct acpi_softc *sc; 317 ACPI_STATUS status; 318 int error; 319 UINT32 flags; 320 321 #ifdef ENABLE_DEBUGGER 322 char *debugpoint = getenv("debug.acpi.debugger"); 323 #endif 324 325 ACPI_FUNCTION_TRACE(__func__); 326 ACPI_LOCK; 327 sc = device_get_softc(dev); 328 bzero(sc, sizeof(*sc)); 329 sc->acpi_dev = dev; 330 331 #ifdef ENABLE_DEBUGGER 332 if (debugpoint && !strcmp(debugpoint, "spaces")) 333 acpi_EnterDebugger(); 334 #endif 335 336 /* 337 * Install the default address space handlers. 338 */ 339 error = ENXIO; 340 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 341 ACPI_ADR_SPACE_SYSTEM_MEMORY, 342 ACPI_DEFAULT_HANDLER, 343 NULL, NULL))) { 344 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 345 goto out; 346 } 347 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 348 ACPI_ADR_SPACE_SYSTEM_IO, 349 ACPI_DEFAULT_HANDLER, 350 NULL, NULL))) { 351 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 352 goto out; 353 } 354 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 355 ACPI_ADR_SPACE_PCI_CONFIG, 356 ACPI_DEFAULT_HANDLER, 357 NULL, NULL))) { 358 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 359 goto out; 360 } 361 362 /* 363 * Bring ACPI fully online. 364 * 365 * Note that some systems (specifically, those with namespace evaluation issues 366 * that require the avoidance of parts of the namespace) must avoid running _INI 367 * and _STA on everything, as well as dodging the final object init pass. 368 * 369 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 370 * 371 * XXX We should arrange for the object init pass after we have attached all our 372 * child devices, but on many systems it works here. 373 */ 374 #ifdef ENABLE_DEBUGGER 375 if (debugpoint && !strcmp(debugpoint, "enable")) 376 acpi_EnterDebugger(); 377 #endif 378 flags = 0; 379 if (getenv("debug.acpi.avoid") != NULL) 380 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 381 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 382 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 383 goto out; 384 } 385 386 /* 387 * Setup our sysctl tree. 388 * 389 * XXX: This doesn't check to make sure that none of these fail. 390 */ 391 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 392 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 393 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 394 device_get_name(dev), CTLFLAG_RD, 0, ""); 395 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 396 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 397 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 398 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 399 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 400 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 401 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 402 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 403 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 404 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 405 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 406 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 407 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 408 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 409 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 410 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 411 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 412 &sc->acpi_s4bios, 0, "S4BIOS mode"); 413 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 414 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 415 &sc->acpi_verbose, 0, "verbose mode"); 416 sc->acpi_s4bios = 1; 417 if (bootverbose) 418 sc->acpi_verbose = 1; 419 420 /* 421 * Dispatch the default sleep state to devices. 422 * TBD: should be configured from userland policy manager. 423 */ 424 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 425 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 426 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 427 sc->acpi_standby_sx = ACPI_STATE_S1; 428 sc->acpi_suspend_sx = ACPI_STATE_S3; 429 430 acpi_enable_fixed_events(sc); 431 432 /* 433 * Scan the namespace and attach/initialise children. 434 */ 435 #ifdef ENABLE_DEBUGGER 436 if (debugpoint && !strcmp(debugpoint, "probe")) 437 acpi_EnterDebugger(); 438 #endif 439 if (!acpi_disabled("bus")) 440 acpi_probe_children(dev); 441 442 /* 443 * Register our shutdown handlers 444 */ 445 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 446 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 447 448 /* 449 * Register our acpi event handlers. 450 * XXX should be configurable eg. via userland policy manager. 451 */ 452 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 453 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 454 455 /* 456 * Flag our initial states. 457 */ 458 sc->acpi_enabled = 1; 459 sc->acpi_sstate = ACPI_STATE_S0; 460 sc->acpi_sleep_disabled = 0; 461 462 /* 463 * Create the control device 464 */ 465 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 466 sc->acpi_dev_t->si_drv1 = sc; 467 468 #ifdef ENABLE_DEBUGGER 469 if (debugpoint && !strcmp(debugpoint, "running")) 470 acpi_EnterDebugger(); 471 #endif 472 473 #if defined(ACPI_MAX_THREADS) && ACPI_MAX_THREADS > 0 474 if ((error = acpi_task_thread_init())) { 475 goto out; 476 } 477 #endif 478 479 if ((error = acpi_machdep_init(dev))) { 480 goto out; 481 } 482 483 /* Register ACPI again to pass the correct argument of pm_func. */ 484 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 485 486 error = 0; 487 488 out: 489 ACPI_UNLOCK; 490 return_VALUE(error); 491 } 492 493 /* 494 * Handle a new device being added 495 */ 496 static device_t 497 acpi_add_child(device_t bus, int order, const char *name, int unit) 498 { 499 struct acpi_device *ad; 500 device_t child; 501 502 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 503 return(NULL); 504 bzero(ad, sizeof(*ad)); 505 506 resource_list_init(&ad->ad_rl); 507 508 child = device_add_child_ordered(bus, order, name, unit); 509 if (child != NULL) 510 device_set_ivars(child, ad); 511 return(child); 512 } 513 514 /* 515 * Print child device resource usage 516 */ 517 static int 518 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 519 { 520 struct resource_list_entry *rle; 521 int printed, retval; 522 523 printed = 0; 524 retval = 0; 525 526 if (!SLIST_FIRST(rl)) 527 return(0); 528 529 /* Yes, this is kinda cheating */ 530 SLIST_FOREACH(rle, rl, link) { 531 if (rle->type == type) { 532 if (printed == 0) 533 retval += printf(" %s ", name); 534 else if (printed > 0) 535 retval += printf(","); 536 printed++; 537 retval += printf(format, rle->start); 538 if (rle->count > 1) { 539 retval += printf("-"); 540 retval += printf(format, rle->start + 541 rle->count - 1); 542 } 543 } 544 } 545 return(retval); 546 } 547 548 static int 549 acpi_print_child(device_t bus, device_t child) 550 { 551 struct acpi_device *adev = device_get_ivars(child); 552 struct resource_list *rl = &adev->ad_rl; 553 int retval = 0; 554 555 retval += bus_print_child_header(bus, child); 556 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 557 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 558 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 559 retval += bus_print_child_footer(bus, child); 560 561 return(retval); 562 } 563 564 565 /* 566 * Handle per-device ivars 567 */ 568 static int 569 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 570 { 571 struct acpi_device *ad; 572 573 if ((ad = device_get_ivars(child)) == NULL) { 574 printf("device has no ivars\n"); 575 return(ENOENT); 576 } 577 578 switch(index) { 579 /* ACPI ivars */ 580 case ACPI_IVAR_HANDLE: 581 *(ACPI_HANDLE *)result = ad->ad_handle; 582 break; 583 case ACPI_IVAR_MAGIC: 584 *(int *)result = ad->ad_magic; 585 break; 586 case ACPI_IVAR_PRIVATE: 587 *(void **)result = ad->ad_private; 588 break; 589 590 /* ISA compatibility */ 591 case ISA_IVAR_VENDORID: 592 case ISA_IVAR_SERIAL: 593 case ISA_IVAR_COMPATID: 594 *(int *)result = -1; 595 break; 596 597 case ISA_IVAR_LOGICALID: 598 *(int *)result = acpi_isa_get_logicalid(child); 599 break; 600 601 default: 602 panic("bad ivar read request (%d)\n", index); 603 return(ENOENT); 604 } 605 return(0); 606 } 607 608 static int 609 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 610 { 611 struct acpi_device *ad; 612 613 if ((ad = device_get_ivars(child)) == NULL) { 614 printf("device has no ivars\n"); 615 return(ENOENT); 616 } 617 618 switch(index) { 619 /* ACPI ivars */ 620 case ACPI_IVAR_HANDLE: 621 ad->ad_handle = (ACPI_HANDLE)value; 622 break; 623 case ACPI_IVAR_MAGIC: 624 ad->ad_magic = (int )value; 625 break; 626 case ACPI_IVAR_PRIVATE: 627 ad->ad_private = (void *)value; 628 break; 629 630 default: 631 panic("bad ivar write request (%d)\n", index); 632 return(ENOENT); 633 } 634 return(0); 635 } 636 637 /* 638 * Handle child resource allocation/removal 639 */ 640 static int 641 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 642 { 643 struct acpi_device *ad = device_get_ivars(child); 644 struct resource_list *rl = &ad->ad_rl; 645 646 resource_list_add(rl, type, rid, start, start + count -1, count); 647 648 return(0); 649 } 650 651 static int 652 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 653 { 654 struct acpi_device *ad = device_get_ivars(child); 655 struct resource_list *rl = &ad->ad_rl; 656 struct resource_list_entry *rle; 657 658 rle = resource_list_find(rl, type, rid); 659 if (!rle) 660 return(ENOENT); 661 662 if (startp) 663 *startp = rle->start; 664 if (countp) 665 *countp = rle->count; 666 667 return(0); 668 } 669 670 static struct resource * 671 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 672 u_long start, u_long end, u_long count, u_int flags) 673 { 674 struct acpi_device *ad = device_get_ivars(child); 675 struct resource_list *rl = &ad->ad_rl; 676 677 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 678 } 679 680 static int 681 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 682 { 683 struct acpi_device *ad = device_get_ivars(child); 684 struct resource_list *rl = &ad->ad_rl; 685 686 return(resource_list_release(rl, bus, child, type, rid, r)); 687 } 688 689 /* 690 * Handle ISA-like devices probing for a PnP ID to match. 691 */ 692 #define PNP_EISAID(s) \ 693 ((((s[0] - '@') & 0x1f) << 2) \ 694 | (((s[1] - '@') & 0x18) >> 3) \ 695 | (((s[1] - '@') & 0x07) << 13) \ 696 | (((s[2] - '@') & 0x1f) << 8) \ 697 | (PNP_HEXTONUM(s[4]) << 16) \ 698 | (PNP_HEXTONUM(s[3]) << 20) \ 699 | (PNP_HEXTONUM(s[6]) << 24) \ 700 | (PNP_HEXTONUM(s[5]) << 28)) 701 702 static u_int32_t 703 acpi_isa_get_logicalid(device_t dev) 704 { 705 ACPI_HANDLE h; 706 ACPI_DEVICE_INFO devinfo; 707 ACPI_STATUS error; 708 u_int32_t pnpid; 709 710 ACPI_FUNCTION_TRACE(__func__); 711 712 pnpid = 0; 713 ACPI_LOCK; 714 715 /* fetch and validate the HID */ 716 if ((h = acpi_get_handle(dev)) == NULL) 717 goto out; 718 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 719 goto out; 720 if (!(devinfo.Valid & ACPI_VALID_HID)) 721 goto out; 722 723 pnpid = PNP_EISAID(devinfo.HardwareId); 724 out: 725 ACPI_UNLOCK; 726 return_VALUE(pnpid); 727 } 728 729 static int 730 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 731 { 732 int result; 733 u_int32_t pnpid; 734 735 ACPI_FUNCTION_TRACE(__func__); 736 737 /* 738 * ISA-style drivers attached to ACPI may persist and 739 * probe manually if we return ENOENT. We never want 740 * that to happen, so don't ever return it. 741 */ 742 result = ENXIO; 743 744 /* scan the supplied IDs for a match */ 745 pnpid = acpi_isa_get_logicalid(child); 746 while (ids && ids->ip_id) { 747 if (pnpid == ids->ip_id) { 748 result = 0; 749 goto out; 750 } 751 ids++; 752 } 753 out: 754 return_VALUE(result); 755 } 756 757 /* 758 * Scan relevant portions of the ACPI namespace and attach child devices. 759 * 760 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 761 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 762 */ 763 static void 764 acpi_probe_children(device_t bus) 765 { 766 ACPI_HANDLE parent; 767 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 768 int i; 769 770 ACPI_FUNCTION_TRACE(__func__); 771 ACPI_ASSERTLOCK; 772 773 /* 774 * Create any static children by calling device identify methods. 775 */ 776 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 777 bus_generic_probe(bus); 778 779 /* 780 * Scan the namespace and insert placeholders for all the devices that 781 * we find. 782 * 783 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 784 * we want to create nodes for all devices, not just those that are currently 785 * present. (This assumes that we don't want to create/remove devices as they 786 * appear, which might be smarter.) 787 */ 788 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 789 for (i = 0; scopes[i] != NULL; i++) 790 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent))) 791 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 792 793 /* 794 * Scan all of the child devices we have created and let them probe/attach. 795 */ 796 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 797 bus_generic_attach(bus); 798 799 /* 800 * Some of these children may have attached others as part of their attach 801 * process (eg. the root PCI bus driver), so rescan. 802 */ 803 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 804 bus_generic_attach(bus); 805 806 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 807 return_VOID; 808 } 809 810 /* 811 * Evaluate a child device and determine whether we might attach a device to 812 * it. 813 */ 814 static ACPI_STATUS 815 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 816 { 817 ACPI_OBJECT_TYPE type; 818 device_t child, bus = (device_t)context; 819 820 ACPI_FUNCTION_TRACE(__func__); 821 822 /* 823 * Skip this device if we think we'll have trouble with it. 824 */ 825 if (acpi_avoid(handle)) 826 return_ACPI_STATUS(AE_OK); 827 828 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 829 switch(type) { 830 case ACPI_TYPE_DEVICE: 831 case ACPI_TYPE_PROCESSOR: 832 case ACPI_TYPE_THERMAL: 833 case ACPI_TYPE_POWER: 834 if (acpi_disabled("children")) 835 break; 836 /* 837 * Create a placeholder device for this node. Sort the placeholder 838 * so that the probe/attach passes will run breadth-first. 839 */ 840 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 841 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 842 if (child == NULL) 843 break; 844 acpi_set_handle(child, handle); 845 846 /* 847 * Check that the device is present. If it's not present, 848 * leave it disabled (so that we have a device_t attached to 849 * the handle, but we don't probe it). 850 */ 851 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 852 device_disable(child); 853 break; 854 } 855 856 /* 857 * Get the device's resource settings and attach them. 858 * Note that if the device has _PRS but no _CRS, we need 859 * to decide when it's appropriate to try to configure the 860 * device. Ignore the return value here; it's OK for the 861 * device not to have any resources. 862 */ 863 acpi_parse_resources(child, handle, &acpi_res_parse_set); 864 865 /* if we're debugging, probe/attach now rather than later */ 866 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 867 break; 868 } 869 } 870 return_ACPI_STATUS(AE_OK); 871 } 872 873 static void 874 acpi_shutdown_pre_sync(void *arg, int howto) 875 { 876 877 ACPI_ASSERTLOCK; 878 879 /* 880 * Disable all ACPI events before soft off, otherwise the system 881 * will be turned on again on some laptops. 882 * 883 * XXX this should probably be restricted to masking some events just 884 * before powering down, since we may still need ACPI during the 885 * shutdown process. 886 */ 887 acpi_Disable((struct acpi_softc *)arg); 888 } 889 890 static void 891 acpi_shutdown_final(void *arg, int howto) 892 { 893 ACPI_STATUS status; 894 895 ACPI_ASSERTLOCK; 896 897 if (howto & RB_POWEROFF) { 898 printf("Power system off using ACPI...\n"); 899 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) { 900 printf("AcpiEnterSleepStatePrep failed - %s\n", 901 AcpiFormatException(status)); 902 return; 903 } 904 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) { 905 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 906 } else { 907 DELAY(1000000); 908 printf("ACPI power-off failed - timeout\n"); 909 } 910 } 911 } 912 913 static void 914 acpi_enable_fixed_events(struct acpi_softc *sc) 915 { 916 static int first_time = 1; 917 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 918 919 ACPI_ASSERTLOCK; 920 921 /* Enable and clear fixed events and install handlers. */ 922 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 923 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0); 924 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 925 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 926 acpi_eventhandler_power_button_for_sleep, sc); 927 if (first_time) { 928 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 929 } 930 } 931 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 932 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0); 933 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 934 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 935 acpi_eventhandler_sleep_button_for_sleep, sc); 936 if (first_time) { 937 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 938 } 939 } 940 941 first_time = 0; 942 } 943 944 /* 945 * Returns true if the device is actually present and should 946 * be attached to. This requires the present, enabled, UI-visible 947 * and diagnostics-passed bits to be set. 948 */ 949 BOOLEAN 950 acpi_DeviceIsPresent(device_t dev) 951 { 952 ACPI_HANDLE h; 953 ACPI_DEVICE_INFO devinfo; 954 ACPI_STATUS error; 955 956 ACPI_ASSERTLOCK; 957 958 if ((h = acpi_get_handle(dev)) == NULL) 959 return(FALSE); 960 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 961 return(FALSE); 962 /* if no _STA method, must be present */ 963 if (!(devinfo.Valid & ACPI_VALID_STA)) 964 return(TRUE); 965 /* return true for 'present' and 'functioning' */ 966 if ((devinfo.CurrentStatus & 0x9) == 0x9) 967 return(TRUE); 968 return(FALSE); 969 } 970 971 /* 972 * Returns true if the battery is actually present and inserted. 973 */ 974 BOOLEAN 975 acpi_BatteryIsPresent(device_t dev) 976 { 977 ACPI_HANDLE h; 978 ACPI_DEVICE_INFO devinfo; 979 ACPI_STATUS error; 980 981 ACPI_ASSERTLOCK; 982 983 if ((h = acpi_get_handle(dev)) == NULL) 984 return(FALSE); 985 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 986 return(FALSE); 987 /* if no _STA method, must be present */ 988 if (!(devinfo.Valid & ACPI_VALID_STA)) 989 return(TRUE); 990 /* return true for 'present' and 'functioning' */ 991 if ((devinfo.CurrentStatus & 0x19) == 0x19) 992 return(TRUE); 993 return(FALSE); 994 } 995 996 /* 997 * Match a HID string against a device 998 */ 999 BOOLEAN 1000 acpi_MatchHid(device_t dev, char *hid) 1001 { 1002 ACPI_HANDLE h; 1003 ACPI_DEVICE_INFO devinfo; 1004 ACPI_STATUS error; 1005 int cid; 1006 1007 ACPI_ASSERTLOCK; 1008 1009 if (hid == NULL) 1010 return(FALSE); 1011 if ((h = acpi_get_handle(dev)) == NULL) 1012 return(FALSE); 1013 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1014 return(FALSE); 1015 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 1016 return(TRUE); 1017 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid))) 1018 return(FALSE); 1019 if (cid == PNP_EISAID(hid)) 1020 return(TRUE); 1021 return(FALSE); 1022 } 1023 1024 /* 1025 * Return the handle of a named object within our scope, ie. that of (parent) 1026 * or one if its parents. 1027 */ 1028 ACPI_STATUS 1029 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1030 { 1031 ACPI_HANDLE r; 1032 ACPI_STATUS status; 1033 1034 ACPI_ASSERTLOCK; 1035 1036 /* walk back up the tree to the root */ 1037 for (;;) { 1038 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) { 1039 *result = r; 1040 return(AE_OK); 1041 } 1042 if (status != AE_NOT_FOUND) 1043 return(AE_OK); 1044 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1045 return(AE_NOT_FOUND); 1046 parent = r; 1047 } 1048 } 1049 1050 /* 1051 * Allocate a buffer with a preset data size. 1052 */ 1053 ACPI_BUFFER * 1054 acpi_AllocBuffer(int size) 1055 { 1056 ACPI_BUFFER *buf; 1057 1058 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1059 return(NULL); 1060 buf->Length = size; 1061 buf->Pointer = (void *)(buf + 1); 1062 return(buf); 1063 } 1064 1065 /* 1066 * Evaluate a path that should return an integer. 1067 */ 1068 ACPI_STATUS 1069 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1070 { 1071 ACPI_STATUS error; 1072 ACPI_BUFFER buf; 1073 ACPI_OBJECT param; 1074 1075 ACPI_ASSERTLOCK; 1076 1077 if (handle == NULL) 1078 handle = ACPI_ROOT_OBJECT; 1079 1080 /* 1081 * Assume that what we've been pointed at is an Integer object, or 1082 * a method that will return an Integer. 1083 */ 1084 buf.Pointer = ¶m; 1085 buf.Length = sizeof(param); 1086 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1087 if (param.Type == ACPI_TYPE_INTEGER) { 1088 *number = param.Integer.Value; 1089 } else { 1090 error = AE_TYPE; 1091 } 1092 } 1093 1094 /* 1095 * In some applications, a method that's expected to return an Integer 1096 * may instead return a Buffer (probably to simplify some internal 1097 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1098 * convert it into an Integer as best we can. 1099 * 1100 * This is a hack. 1101 */ 1102 if (error == AE_BUFFER_OVERFLOW) { 1103 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1104 error = AE_NO_MEMORY; 1105 } else { 1106 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1107 error = acpi_ConvertBufferToInteger(&buf, number); 1108 } 1109 } 1110 AcpiOsFree(buf.Pointer); 1111 } 1112 return(error); 1113 } 1114 1115 ACPI_STATUS 1116 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1117 { 1118 ACPI_OBJECT *p; 1119 int i; 1120 1121 p = (ACPI_OBJECT *)bufp->Pointer; 1122 if (p->Type == ACPI_TYPE_INTEGER) { 1123 *number = p->Integer.Value; 1124 return(AE_OK); 1125 } 1126 if (p->Type != ACPI_TYPE_BUFFER) 1127 return(AE_TYPE); 1128 if (p->Buffer.Length > sizeof(int)) 1129 return(AE_BAD_DATA); 1130 *number = 0; 1131 for (i = 0; i < p->Buffer.Length; i++) 1132 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1133 return(AE_OK); 1134 } 1135 1136 /* 1137 * Iterate over the elements of an a package object, calling the supplied 1138 * function for each element. 1139 * 1140 * XXX possible enhancement might be to abort traversal on error. 1141 */ 1142 ACPI_STATUS 1143 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1144 { 1145 ACPI_OBJECT *comp; 1146 int i; 1147 1148 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1149 return(AE_BAD_PARAMETER); 1150 1151 /* iterate over components */ 1152 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1153 func(comp, arg); 1154 1155 return(AE_OK); 1156 } 1157 1158 /* 1159 * Find the (index)th resource object in a set. 1160 */ 1161 ACPI_STATUS 1162 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1163 { 1164 ACPI_RESOURCE *rp; 1165 int i; 1166 1167 rp = (ACPI_RESOURCE *)buf->Pointer; 1168 i = index; 1169 while (i-- > 0) { 1170 /* range check */ 1171 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1172 return(AE_BAD_PARAMETER); 1173 /* check for terminator */ 1174 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1175 (rp->Length == 0)) 1176 return(AE_NOT_FOUND); 1177 rp = ACPI_RESOURCE_NEXT(rp); 1178 } 1179 if (resp != NULL) 1180 *resp = rp; 1181 return(AE_OK); 1182 } 1183 1184 /* 1185 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1186 * 1187 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1188 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1189 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1190 * resources. 1191 */ 1192 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1193 1194 ACPI_STATUS 1195 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1196 { 1197 ACPI_RESOURCE *rp; 1198 void *newp; 1199 1200 /* 1201 * Initialise the buffer if necessary. 1202 */ 1203 if (buf->Pointer == NULL) { 1204 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1205 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1206 return(AE_NO_MEMORY); 1207 rp = (ACPI_RESOURCE *)buf->Pointer; 1208 rp->Id = ACPI_RSTYPE_END_TAG; 1209 rp->Length = 0; 1210 } 1211 if (res == NULL) 1212 return(AE_OK); 1213 1214 /* 1215 * Scan the current buffer looking for the terminator. 1216 * This will either find the terminator or hit the end 1217 * of the buffer and return an error. 1218 */ 1219 rp = (ACPI_RESOURCE *)buf->Pointer; 1220 for (;;) { 1221 /* range check, don't go outside the buffer */ 1222 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1223 return(AE_BAD_PARAMETER); 1224 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1225 (rp->Length == 0)) { 1226 break; 1227 } 1228 rp = ACPI_RESOURCE_NEXT(rp); 1229 } 1230 1231 /* 1232 * Check the size of the buffer and expand if required. 1233 * 1234 * Required size is: 1235 * size of existing resources before terminator + 1236 * size of new resource and header + 1237 * size of terminator. 1238 * 1239 * Note that this loop should really only run once, unless 1240 * for some reason we are stuffing a *really* huge resource. 1241 */ 1242 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1243 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1244 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1245 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1246 return(AE_NO_MEMORY); 1247 bcopy(buf->Pointer, newp, buf->Length); 1248 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1249 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1250 AcpiOsFree(buf->Pointer); 1251 buf->Pointer = newp; 1252 buf->Length += buf->Length; 1253 } 1254 1255 /* 1256 * Insert the new resource. 1257 */ 1258 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1259 1260 /* 1261 * And add the terminator. 1262 */ 1263 rp = ACPI_RESOURCE_NEXT(rp); 1264 rp->Id = ACPI_RSTYPE_END_TAG; 1265 rp->Length = 0; 1266 1267 return(AE_OK); 1268 } 1269 1270 #define ACPI_MINIMUM_AWAKETIME 5 1271 1272 static void 1273 acpi_sleep_enable(void *arg) 1274 { 1275 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1276 } 1277 1278 /* 1279 * Set the system sleep state 1280 * 1281 * Currently we only support S1 and S5 1282 */ 1283 ACPI_STATUS 1284 acpi_SetSleepState(struct acpi_softc *sc, int state) 1285 { 1286 ACPI_STATUS status = AE_OK; 1287 UINT8 TypeA; 1288 UINT8 TypeB; 1289 1290 ACPI_FUNCTION_TRACE_U32(__func__, state); 1291 ACPI_ASSERTLOCK; 1292 1293 if (sc->acpi_sstate != ACPI_STATE_S0) 1294 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */ 1295 1296 if (sc->acpi_sleep_disabled) 1297 return_ACPI_STATUS(AE_OK); 1298 1299 switch (state) { 1300 case ACPI_STATE_S0: /* XXX only for testing */ 1301 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1302 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1303 } 1304 break; 1305 1306 case ACPI_STATE_S1: 1307 case ACPI_STATE_S2: 1308 case ACPI_STATE_S3: 1309 case ACPI_STATE_S4: 1310 if (ACPI_FAILURE(status = AcpiHwGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) { 1311 device_printf(sc->acpi_dev, "AcpiHwGetSleepTypeData failed - %s\n", AcpiFormatException(status)); 1312 break; 1313 } 1314 1315 /* 1316 * Inform all devices that we are going to sleep. 1317 */ 1318 if (DEVICE_SUSPEND(root_bus) != 0) { 1319 /* 1320 * Re-wake the system. 1321 * 1322 * XXX note that a better two-pass approach with a 'veto' pass 1323 * followed by a "real thing" pass would be better, but the 1324 * current bus interface does not provide for this. 1325 */ 1326 DEVICE_RESUME(root_bus); 1327 return_ACPI_STATUS(AE_ERROR); 1328 } 1329 1330 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) { 1331 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1332 AcpiFormatException(status)); 1333 break; 1334 } 1335 1336 sc->acpi_sstate = state; 1337 sc->acpi_sleep_disabled = 1; 1338 1339 if (state != ACPI_STATE_S1) { 1340 acpi_sleep_machdep(sc, state); 1341 1342 /* AcpiEnterSleepState() maybe incompleted, unlock here. */ 1343 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1344 1345 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1346 if (state == ACPI_STATE_S4) { 1347 AcpiEnable(); 1348 } 1349 } else { 1350 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1351 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1352 break; 1353 } 1354 } 1355 AcpiLeaveSleepState((UINT8)state); 1356 DEVICE_RESUME(root_bus); 1357 sc->acpi_sstate = ACPI_STATE_S0; 1358 acpi_enable_fixed_events(sc); 1359 break; 1360 1361 case ACPI_STATE_S5: 1362 /* 1363 * Shut down cleanly and power off. This will call us back through the 1364 * shutdown handlers. 1365 */ 1366 shutdown_nice(RB_POWEROFF); 1367 break; 1368 1369 default: 1370 status = AE_BAD_PARAMETER; 1371 break; 1372 } 1373 1374 if (sc->acpi_sleep_disabled) 1375 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1376 1377 return_ACPI_STATUS(status); 1378 } 1379 1380 /* 1381 * Enable/Disable ACPI 1382 */ 1383 ACPI_STATUS 1384 acpi_Enable(struct acpi_softc *sc) 1385 { 1386 ACPI_STATUS status; 1387 u_int32_t flags; 1388 1389 ACPI_FUNCTION_TRACE(__func__); 1390 ACPI_ASSERTLOCK; 1391 1392 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1393 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1394 if (!sc->acpi_enabled) { 1395 status = AcpiEnableSubsystem(flags); 1396 } else { 1397 status = AE_OK; 1398 } 1399 if (status == AE_OK) 1400 sc->acpi_enabled = 1; 1401 return_ACPI_STATUS(status); 1402 } 1403 1404 ACPI_STATUS 1405 acpi_Disable(struct acpi_softc *sc) 1406 { 1407 ACPI_STATUS status; 1408 1409 ACPI_FUNCTION_TRACE(__func__); 1410 ACPI_ASSERTLOCK; 1411 1412 if (sc->acpi_enabled) { 1413 status = AcpiDisable(); 1414 } else { 1415 status = AE_OK; 1416 } 1417 if (status == AE_OK) 1418 sc->acpi_enabled = 0; 1419 return_ACPI_STATUS(status); 1420 } 1421 1422 /* 1423 * ACPI Event Handlers 1424 */ 1425 1426 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1427 1428 static void 1429 acpi_system_eventhandler_sleep(void *arg, int state) 1430 { 1431 ACPI_FUNCTION_TRACE_U32(__func__, state); 1432 1433 ACPI_LOCK; 1434 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1435 acpi_SetSleepState((struct acpi_softc *)arg, state); 1436 ACPI_UNLOCK; 1437 return_VOID; 1438 } 1439 1440 static void 1441 acpi_system_eventhandler_wakeup(void *arg, int state) 1442 { 1443 ACPI_FUNCTION_TRACE_U32(__func__, state); 1444 1445 /* Well, what to do? :-) */ 1446 1447 ACPI_LOCK; 1448 ACPI_UNLOCK; 1449 1450 return_VOID; 1451 } 1452 1453 /* 1454 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1455 */ 1456 UINT32 1457 acpi_eventhandler_power_button_for_sleep(void *context) 1458 { 1459 struct acpi_softc *sc = (struct acpi_softc *)context; 1460 1461 ACPI_FUNCTION_TRACE(__func__); 1462 1463 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1464 1465 return_VALUE(ACPI_INTERRUPT_HANDLED); 1466 } 1467 1468 UINT32 1469 acpi_eventhandler_power_button_for_wakeup(void *context) 1470 { 1471 struct acpi_softc *sc = (struct acpi_softc *)context; 1472 1473 ACPI_FUNCTION_TRACE(__func__); 1474 1475 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1476 1477 return_VALUE(ACPI_INTERRUPT_HANDLED); 1478 } 1479 1480 UINT32 1481 acpi_eventhandler_sleep_button_for_sleep(void *context) 1482 { 1483 struct acpi_softc *sc = (struct acpi_softc *)context; 1484 1485 ACPI_FUNCTION_TRACE(__func__); 1486 1487 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1488 1489 return_VALUE(ACPI_INTERRUPT_HANDLED); 1490 } 1491 1492 UINT32 1493 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1494 { 1495 struct acpi_softc *sc = (struct acpi_softc *)context; 1496 1497 ACPI_FUNCTION_TRACE(__func__); 1498 1499 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1500 1501 return_VALUE(ACPI_INTERRUPT_HANDLED); 1502 } 1503 1504 /* 1505 * XXX This is kinda ugly, and should not be here. 1506 */ 1507 struct acpi_staticbuf { 1508 ACPI_BUFFER buffer; 1509 char data[512]; 1510 }; 1511 1512 char * 1513 acpi_name(ACPI_HANDLE handle) 1514 { 1515 static struct acpi_staticbuf buf; 1516 1517 ACPI_ASSERTLOCK; 1518 1519 buf.buffer.Length = 512; 1520 buf.buffer.Pointer = &buf.data[0]; 1521 1522 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1523 return(buf.buffer.Pointer); 1524 return("(unknown path)"); 1525 } 1526 1527 /* 1528 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1529 * parts of the namespace. 1530 */ 1531 int 1532 acpi_avoid(ACPI_HANDLE handle) 1533 { 1534 char *cp, *np; 1535 int len; 1536 1537 np = acpi_name(handle); 1538 if (*np == '\\') 1539 np++; 1540 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1541 return(0); 1542 1543 /* scan the avoid list checking for a match */ 1544 for (;;) { 1545 while ((*cp != 0) && isspace(*cp)) 1546 cp++; 1547 if (*cp == 0) 1548 break; 1549 len = 0; 1550 while ((cp[len] != 0) && !isspace(cp[len])) 1551 len++; 1552 if (!strncmp(cp, np, len)) 1553 return(1); 1554 cp += len; 1555 } 1556 return(0); 1557 } 1558 1559 /* 1560 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1561 */ 1562 int 1563 acpi_disabled(char *subsys) 1564 { 1565 char *cp; 1566 int len; 1567 1568 if ((cp = getenv("debug.acpi.disable")) == NULL) 1569 return(0); 1570 if (!strcmp(cp, "all")) 1571 return(1); 1572 1573 /* scan the disable list checking for a match */ 1574 for (;;) { 1575 while ((*cp != 0) && isspace(*cp)) 1576 cp++; 1577 if (*cp == 0) 1578 break; 1579 len = 0; 1580 while ((cp[len] != 0) && !isspace(cp[len])) 1581 len++; 1582 if (!strncmp(cp, subsys, len)) 1583 return(1); 1584 cp += len; 1585 } 1586 return(0); 1587 } 1588 1589 /* 1590 * Control interface. 1591 * 1592 * We multiplex ioctls for all participating ACPI devices here. Individual 1593 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1594 * interface to make their handlers visible. 1595 */ 1596 struct acpi_ioctl_hook 1597 { 1598 TAILQ_ENTRY(acpi_ioctl_hook) link; 1599 u_long cmd; 1600 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1601 void *arg; 1602 }; 1603 1604 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1605 static int acpi_ioctl_hooks_initted; 1606 1607 /* 1608 * Register an ioctl handler. 1609 */ 1610 int 1611 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1612 { 1613 struct acpi_ioctl_hook *hp; 1614 1615 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1616 return(ENOMEM); 1617 hp->cmd = cmd; 1618 hp->fn = fn; 1619 hp->arg = arg; 1620 if (acpi_ioctl_hooks_initted == 0) { 1621 TAILQ_INIT(&acpi_ioctl_hooks); 1622 acpi_ioctl_hooks_initted = 1; 1623 } 1624 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1625 return(0); 1626 } 1627 1628 /* 1629 * Deregister an ioctl handler. 1630 */ 1631 void 1632 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1633 { 1634 struct acpi_ioctl_hook *hp; 1635 1636 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1637 if ((hp->cmd == cmd) && (hp->fn == fn)) 1638 break; 1639 1640 if (hp != NULL) { 1641 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1642 free(hp, M_ACPIDEV); 1643 } 1644 } 1645 1646 static int 1647 acpiopen(dev_t dev, int flag, int fmt, struct thread *td) 1648 { 1649 return(0); 1650 } 1651 1652 static int 1653 acpiclose(dev_t dev, int flag, int fmt, struct thread *td) 1654 { 1655 return(0); 1656 } 1657 1658 static int 1659 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1660 { 1661 struct acpi_softc *sc; 1662 struct acpi_ioctl_hook *hp; 1663 int error, xerror, state; 1664 1665 ACPI_LOCK; 1666 1667 error = state = 0; 1668 sc = dev->si_drv1; 1669 1670 /* 1671 * Scan the list of registered ioctls, looking for handlers. 1672 */ 1673 if (acpi_ioctl_hooks_initted) { 1674 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1675 if (hp->cmd == cmd) { 1676 xerror = hp->fn(cmd, addr, hp->arg); 1677 if (xerror != 0) 1678 error = xerror; 1679 goto out; 1680 } 1681 } 1682 } 1683 1684 /* 1685 * Core system ioctls. 1686 */ 1687 switch (cmd) { 1688 case ACPIIO_ENABLE: 1689 if (ACPI_FAILURE(acpi_Enable(sc))) 1690 error = ENXIO; 1691 break; 1692 1693 case ACPIIO_DISABLE: 1694 if (ACPI_FAILURE(acpi_Disable(sc))) 1695 error = ENXIO; 1696 break; 1697 1698 case ACPIIO_SETSLPSTATE: 1699 if (!sc->acpi_enabled) { 1700 error = ENXIO; 1701 break; 1702 } 1703 state = *(int *)addr; 1704 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1705 acpi_SetSleepState(sc, state); 1706 } else { 1707 error = EINVAL; 1708 } 1709 break; 1710 1711 default: 1712 if (error == 0) 1713 error = EINVAL; 1714 break; 1715 } 1716 1717 out: 1718 ACPI_UNLOCK; 1719 return(error); 1720 } 1721 1722 static int 1723 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1724 { 1725 char sleep_state[10]; 1726 int error; 1727 u_int new_state, old_state; 1728 1729 old_state = *(u_int *)oidp->oid_arg1; 1730 if (old_state > ACPI_S_STATES_MAX+1) { 1731 strcpy(sleep_state, "unknown"); 1732 } else { 1733 bzero(sleep_state, sizeof(sleep_state)); 1734 strncpy(sleep_state, sleep_state_names[old_state], 1735 sizeof(sleep_state_names[old_state])); 1736 } 1737 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1738 if (error == 0 && req->newptr != NULL) { 1739 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) { 1740 if (strncmp(sleep_state, sleep_state_names[new_state], 1741 sizeof(sleep_state)) == 0) 1742 break; 1743 } 1744 if (new_state <= ACPI_S_STATES_MAX+1) { 1745 if (new_state != old_state) { 1746 *(u_int *)oidp->oid_arg1 = new_state; 1747 } 1748 } else { 1749 error = EINVAL; 1750 } 1751 } 1752 return(error); 1753 } 1754 1755 #ifdef ACPI_DEBUG 1756 /* 1757 * Support for parsing debug options from the kernel environment. 1758 * 1759 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1760 * by specifying the names of the bits in the debug.acpi.layer and 1761 * debug.acpi.level environment variables. Bits may be unset by 1762 * prefixing the bit name with !. 1763 */ 1764 struct debugtag 1765 { 1766 char *name; 1767 UINT32 value; 1768 }; 1769 1770 static struct debugtag dbg_layer[] = { 1771 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1772 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1773 {"ACPI_EVENTS", ACPI_EVENTS}, 1774 {"ACPI_TABLES", ACPI_TABLES}, 1775 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 1776 {"ACPI_PARSER", ACPI_PARSER}, 1777 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 1778 {"ACPI_EXECUTER", ACPI_EXECUTER}, 1779 {"ACPI_RESOURCES", ACPI_RESOURCES}, 1780 {"ACPI_DEBUGGER", ACPI_DEBUGGER}, 1781 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 1782 1783 {"ACPI_BUS", ACPI_BUS}, 1784 {"ACPI_SYSTEM", ACPI_SYSTEM}, 1785 {"ACPI_POWER", ACPI_POWER}, 1786 {"ACPI_EC", ACPI_EC}, 1787 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 1788 {"ACPI_BATTERY", ACPI_BATTERY}, 1789 {"ACPI_BUTTON", ACPI_BUTTON}, 1790 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 1791 {"ACPI_THERMAL", ACPI_THERMAL}, 1792 {"ACPI_FAN", ACPI_FAN}, 1793 1794 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 1795 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 1796 {NULL, 0} 1797 }; 1798 1799 static struct debugtag dbg_level[] = { 1800 {"ACPI_LV_OK", ACPI_LV_OK}, 1801 {"ACPI_LV_INFO", ACPI_LV_INFO}, 1802 {"ACPI_LV_WARN", ACPI_LV_WARN}, 1803 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 1804 {"ACPI_LV_FATAL", ACPI_LV_FATAL}, 1805 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 1806 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 1807 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 1808 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 1809 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 1810 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 1811 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 1812 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 1813 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 1814 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 1815 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 1816 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 1817 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 1818 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 1819 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 1820 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 1821 {"ACPI_LV_IO", ACPI_LV_IO}, 1822 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 1823 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 1824 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 1825 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 1826 {"ACPI_LV_INIT", ACPI_LV_INIT}, 1827 {"ACPI_LV_ALL", ACPI_LV_ALL}, 1828 {"ACPI_DB_AML_DISASSEMBLE", ACPI_DB_AML_DISASSEMBLE}, 1829 {"ACPI_DB_VERBOSE_INFO", ACPI_DB_VERBOSE_INFO}, 1830 {"ACPI_DB_FULL_TABLES", ACPI_DB_FULL_TABLES}, 1831 {"ACPI_DB_EVENTS", ACPI_DB_EVENTS}, 1832 {"ACPI_DB_VERBOSE", ACPI_DB_VERBOSE}, 1833 {NULL, 0} 1834 }; 1835 1836 static void 1837 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1838 { 1839 char *ep; 1840 int i, l; 1841 int set; 1842 1843 while (*cp) { 1844 if (isspace(*cp)) { 1845 cp++; 1846 continue; 1847 } 1848 ep = cp; 1849 while (*ep && !isspace(*ep)) 1850 ep++; 1851 if (*cp == '!') { 1852 set = 0; 1853 cp++; 1854 if (cp == ep) 1855 continue; 1856 } else { 1857 set = 1; 1858 } 1859 l = ep - cp; 1860 for (i = 0; tag[i].name != NULL; i++) { 1861 if (!strncmp(cp, tag[i].name, l)) { 1862 if (set) { 1863 *flag |= tag[i].value; 1864 } else { 1865 *flag &= ~tag[i].value; 1866 } 1867 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1868 } 1869 } 1870 cp = ep; 1871 } 1872 } 1873 1874 static void 1875 acpi_set_debugging(void *junk) 1876 { 1877 char *cp; 1878 1879 AcpiDbgLayer = 0; 1880 AcpiDbgLevel = 0; 1881 if ((cp = getenv("debug.acpi.layer")) != NULL) 1882 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1883 if ((cp = getenv("debug.acpi.level")) != NULL) 1884 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1885 1886 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1887 } 1888 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 1889 #endif 1890 1891 static int 1892 acpi_pm_func(u_long cmd, void *arg, ...) 1893 { 1894 int state, acpi_state; 1895 int error; 1896 struct acpi_softc *sc; 1897 va_list ap; 1898 1899 error = 0; 1900 switch (cmd) { 1901 case POWER_CMD_SUSPEND: 1902 sc = (struct acpi_softc *)arg; 1903 if (sc == NULL) { 1904 error = EINVAL; 1905 goto out; 1906 } 1907 1908 va_start(ap, arg); 1909 state = va_arg(ap, int); 1910 va_end(ap); 1911 1912 switch (state) { 1913 case POWER_SLEEP_STATE_STANDBY: 1914 acpi_state = sc->acpi_standby_sx; 1915 break; 1916 case POWER_SLEEP_STATE_SUSPEND: 1917 acpi_state = sc->acpi_suspend_sx; 1918 break; 1919 case POWER_SLEEP_STATE_HIBERNATE: 1920 acpi_state = ACPI_STATE_S4; 1921 break; 1922 default: 1923 error = EINVAL; 1924 goto out; 1925 } 1926 1927 acpi_SetSleepState(sc, acpi_state); 1928 break; 1929 1930 default: 1931 error = EINVAL; 1932 goto out; 1933 } 1934 1935 out: 1936 return (error); 1937 } 1938 1939 static void 1940 acpi_pm_register(void *arg) 1941 { 1942 1943 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 1944 } 1945 1946 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 1947 1948