acpi.c revision 118642
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 118642 2003-08-08 03:19:22Z 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 47#include <machine/clock.h> 48#include <machine/resource.h> 49 50#include <isa/isavar.h> 51 52#include "acpi.h" 53 54#include <dev/acpica/acpica_support.h> 55 56#include <dev/acpica/acpivar.h> 57#include <dev/acpica/acpiio.h> 58 59MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 60 61/* 62 * Hooks for the ACPI CA debugging infrastructure 63 */ 64#define _COMPONENT ACPI_BUS 65ACPI_MODULE_NAME("ACPI") 66 67/* 68 * Character device 69 */ 70 71static d_open_t acpiopen; 72static d_close_t acpiclose; 73static d_ioctl_t acpiioctl; 74 75#define CDEV_MAJOR 152 76static struct cdevsw acpi_cdevsw = { 77 .d_open = acpiopen, 78 .d_close = acpiclose, 79 .d_ioctl = acpiioctl, 80 .d_name = "acpi", 81 .d_maj = CDEV_MAJOR, 82}; 83 84static const char* sleep_state_names[] = { 85 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 86 87/* this has to be static, as the softc is gone when we need it */ 88static int acpi_off_state = ACPI_STATE_S5; 89 90#if __FreeBSD_version >= 500000 91struct mtx acpi_mutex; 92#endif 93 94static int acpi_modevent(struct module *mod, int event, void *junk); 95static void acpi_identify(driver_t *driver, device_t parent); 96static int acpi_probe(device_t dev); 97static int acpi_attach(device_t dev); 98static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 99static int acpi_print_child(device_t bus, device_t child); 100static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 101static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 102static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 103 u_long count); 104static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 105 u_long *countp); 106static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 107 u_long start, u_long end, u_long count, u_int flags); 108static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 109static u_int32_t acpi_isa_get_logicalid(device_t dev); 110static u_int32_t acpi_isa_get_compatid(device_t dev); 111static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 112 113static void acpi_probe_children(device_t bus); 114static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 115 116static void acpi_shutdown_pre_sync(void *arg, int howto); 117static void acpi_shutdown_final(void *arg, int howto); 118 119static void acpi_enable_fixed_events(struct acpi_softc *sc); 120 121static void acpi_system_eventhandler_sleep(void *arg, int state); 122static void acpi_system_eventhandler_wakeup(void *arg, int state); 123static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 124static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 125 126static int acpi_pm_func(u_long cmd, void *arg, ...); 127 128static device_method_t acpi_methods[] = { 129 /* Device interface */ 130 DEVMETHOD(device_identify, acpi_identify), 131 DEVMETHOD(device_probe, acpi_probe), 132 DEVMETHOD(device_attach, acpi_attach), 133 DEVMETHOD(device_shutdown, bus_generic_shutdown), 134 DEVMETHOD(device_suspend, bus_generic_suspend), 135 DEVMETHOD(device_resume, bus_generic_resume), 136 137 /* Bus interface */ 138 DEVMETHOD(bus_add_child, acpi_add_child), 139 DEVMETHOD(bus_print_child, acpi_print_child), 140 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 141 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 142 DEVMETHOD(bus_set_resource, acpi_set_resource), 143 DEVMETHOD(bus_get_resource, acpi_get_resource), 144 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 145 DEVMETHOD(bus_release_resource, acpi_release_resource), 146 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 147 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 148 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 149 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 150 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 151 152 /* ISA emulation */ 153 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 154 155 {0, 0} 156}; 157 158static driver_t acpi_driver = { 159 "acpi", 160 acpi_methods, 161 sizeof(struct acpi_softc), 162}; 163 164static devclass_t acpi_devclass; 165DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 166MODULE_VERSION(acpi, 100); 167 168SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 169SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 170static int acpi_ca_version = ACPI_CA_VERSION; 171SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 172 173/* 174 * ACPI can only be loaded as a module by the loader; activating it after 175 * system bootstrap time is not useful, and can be fatal to the system. 176 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 177 */ 178static int 179acpi_modevent(struct module *mod, int event, void *junk) 180{ 181 switch(event) { 182 case MOD_LOAD: 183 if (!cold) { 184 printf("The ACPI driver cannot be loaded after boot.\n"); 185 return(EPERM); 186 } 187 break; 188 case MOD_UNLOAD: 189 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 190 return(EBUSY); 191 break; 192 default: 193 break; 194 } 195 return(0); 196} 197 198/* 199 * Detect ACPI, perform early initialisation 200 */ 201static void 202acpi_identify(driver_t *driver, device_t parent) 203{ 204 device_t child; 205 int error; 206#ifdef ACPI_DEBUGGER 207 char *debugpoint; 208#endif 209 210 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 211 212 if (!cold) 213 return_VOID; 214 215 /* 216 * Check that we haven't been disabled with a hint. 217 */ 218 if (resource_disabled("acpi", 0)) 219 return_VOID; 220 221 /* 222 * Make sure we're not being doubly invoked. 223 */ 224 if (device_find_child(parent, "acpi", 0) != NULL) 225 return_VOID; 226 227#if __FreeBSD_version >= 500000 228 /* initialise the ACPI mutex */ 229 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 230#endif 231 232 /* 233 * Start up the ACPI CA subsystem. 234 */ 235#ifdef ACPI_DEBUGGER 236 debugpoint = getenv("debug.acpi.debugger"); 237 if (debugpoint) { 238 if (!strcmp(debugpoint, "init")) 239 acpi_EnterDebugger(); 240 freeenv(debugpoint); 241 } 242#endif 243 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 244 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 245 return_VOID; 246 } 247#ifdef ACPI_DEBUGGER 248 debugpoint = getenv("debug.acpi.debugger"); 249 if (debugpoint) { 250 if (!strcmp(debugpoint, "tables")) 251 acpi_EnterDebugger(); 252 freeenv(debugpoint); 253 } 254#endif 255 256 if (ACPI_FAILURE(error = AcpiLoadTables())) { 257 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 258 return_VOID; 259 } 260 261 /* 262 * Attach the actual ACPI device. 263 */ 264 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 265 device_printf(parent, "ACPI: could not attach\n"); 266 return_VOID; 267 } 268} 269 270/* 271 * Fetch some descriptive data from ACPI to put in our attach message 272 */ 273static int 274acpi_probe(device_t dev) 275{ 276 ACPI_TABLE_HEADER th; 277 char buf[20]; 278 ACPI_STATUS status; 279 int error; 280 ACPI_LOCK_DECL; 281 282 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 283 284 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 285 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 286 device_printf(dev, "Other PM system enabled.\n"); 287 return_VALUE(ENXIO); 288 } 289 290 ACPI_LOCK; 291 292 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 293 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 294 error = ENXIO; 295 } else { 296 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 297 device_set_desc_copy(dev, buf); 298 error = 0; 299 } 300 ACPI_UNLOCK; 301 return_VALUE(error); 302} 303 304static int 305acpi_attach(device_t dev) 306{ 307 struct acpi_softc *sc; 308 ACPI_STATUS status; 309 int error; 310 UINT32 flags; 311 char *env; 312#ifdef ACPI_DEBUGGER 313 char *debugpoint; 314#endif 315 ACPI_LOCK_DECL; 316 317 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 318 ACPI_LOCK; 319 sc = device_get_softc(dev); 320 bzero(sc, sizeof(*sc)); 321 sc->acpi_dev = dev; 322 323#ifdef ACPI_DEBUGGER 324 debugpoint = getenv("debug.acpi.debugger"); 325 if (debugpoint) { 326 if (!strcmp(debugpoint, "spaces")) 327 acpi_EnterDebugger(); 328 freeenv(debugpoint); 329 } 330#endif 331 332 /* 333 * Install the default address space handlers. 334 */ 335 error = ENXIO; 336 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 337 ACPI_ADR_SPACE_SYSTEM_MEMORY, 338 ACPI_DEFAULT_HANDLER, 339 NULL, NULL))) { 340 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 341 goto out; 342 } 343 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 344 ACPI_ADR_SPACE_SYSTEM_IO, 345 ACPI_DEFAULT_HANDLER, 346 NULL, NULL))) { 347 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 348 goto out; 349 } 350 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 351 ACPI_ADR_SPACE_PCI_CONFIG, 352 ACPI_DEFAULT_HANDLER, 353 NULL, NULL))) { 354 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 355 goto out; 356 } 357 358 /* 359 * Bring ACPI fully online. 360 * 361 * Note that some systems (specifically, those with namespace evaluation issues 362 * that require the avoidance of parts of the namespace) must avoid running _INI 363 * and _STA on everything, as well as dodging the final object init pass. 364 * 365 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 366 * 367 * XXX We should arrange for the object init pass after we have attached all our 368 * child devices, but on many systems it works here. 369 */ 370#ifdef ACPI_DEBUGGER 371 debugpoint = getenv("debug.acpi.debugger"); 372 if (debugpoint) { 373 if (!strcmp(debugpoint, "enable")) 374 acpi_EnterDebugger(); 375 freeenv(debugpoint); 376 } 377#endif 378 flags = 0; 379 if (testenv("debug.acpi.avoid")) 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 * Call the ECDT probe function to provide EC functionality before 388 * the namespace has been evaluated. 389 */ 390 acpi_ec_ecdt_probe(dev); 391 392 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 393 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status)); 394 goto out; 395 } 396 397 /* 398 * Setup our sysctl tree. 399 * 400 * XXX: This doesn't check to make sure that none of these fail. 401 */ 402 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 403 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 404 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 405 device_get_name(dev), CTLFLAG_RD, 0, ""); 406 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 407 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 408 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 409 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 410 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 411 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 412 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 413 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 414 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 415 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 416 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 417 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 418 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 419 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 420 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 421 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 422 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 423 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 424 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 425 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 426 &sc->acpi_sleep_delay, 0, "sleep delay"); 427 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 428 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 429 &sc->acpi_s4bios, 0, "S4BIOS mode"); 430 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 431 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 432 &sc->acpi_verbose, 0, "verbose mode"); 433 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 434 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 435 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 436 437 /* 438 * Default to 5 seconds before sleeping to give some machines time to 439 * stabilize. 440 */ 441 sc->acpi_sleep_delay = 5; 442 sc->acpi_disable_on_poweroff = 1; 443 sc->acpi_s4bios = 1; 444 if (bootverbose) 445 sc->acpi_verbose = 1; 446 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 447 sc->acpi_verbose = 1; 448 freeenv(env); 449 } 450 451 /* 452 * Dispatch the default sleep state to devices. 453 * TBD: should be configured from userland policy manager. 454 */ 455 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 456 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 457 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 458 sc->acpi_standby_sx = ACPI_STATE_S1; 459 sc->acpi_suspend_sx = ACPI_STATE_S3; 460 461 acpi_enable_fixed_events(sc); 462 463 /* 464 * Scan the namespace and attach/initialise children. 465 */ 466#ifdef ACPI_DEBUGGER 467 debugpoint = getenv("debug.acpi.debugger"); 468 if (debugpoint) { 469 if (!strcmp(debugpoint, "probe")) 470 acpi_EnterDebugger(); 471 freeenv(debugpoint); 472 } 473#endif 474 475 /* 476 * Register our shutdown handlers 477 */ 478 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 479 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 480 481 /* 482 * Register our acpi event handlers. 483 * XXX should be configurable eg. via userland policy manager. 484 */ 485 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 486 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 487 488 /* 489 * Flag our initial states. 490 */ 491 sc->acpi_enabled = 1; 492 sc->acpi_sstate = ACPI_STATE_S0; 493 sc->acpi_sleep_disabled = 0; 494 495 /* 496 * Create the control device 497 */ 498 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 499 "acpi"); 500 sc->acpi_dev_t->si_drv1 = sc; 501 502#ifdef ACPI_DEBUGGER 503 debugpoint = getenv("debug.acpi.debugger"); 504 if (debugpoint) { 505 if (!strcmp(debugpoint, "running")) 506 acpi_EnterDebugger(); 507 freeenv(debugpoint); 508 } 509#endif 510 511#ifdef ACPI_USE_THREADS 512 if ((error = acpi_task_thread_init())) { 513 goto out; 514 } 515#endif 516 517 if ((error = acpi_machdep_init(dev))) { 518 goto out; 519 } 520 521 /* Register ACPI again to pass the correct argument of pm_func. */ 522 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 523 524 if (!acpi_disabled("bus")) 525 acpi_probe_children(dev); 526 527 error = 0; 528 529 out: 530 ACPI_UNLOCK; 531 return_VALUE(error); 532} 533 534/* 535 * Handle a new device being added 536 */ 537static device_t 538acpi_add_child(device_t bus, int order, const char *name, int unit) 539{ 540 struct acpi_device *ad; 541 device_t child; 542 543 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 544 return(NULL); 545 bzero(ad, sizeof(*ad)); 546 547 resource_list_init(&ad->ad_rl); 548 549 child = device_add_child_ordered(bus, order, name, unit); 550 if (child != NULL) 551 device_set_ivars(child, ad); 552 return(child); 553} 554 555static int 556acpi_print_child(device_t bus, device_t child) 557{ 558 struct acpi_device *adev = device_get_ivars(child); 559 struct resource_list *rl = &adev->ad_rl; 560 int retval = 0; 561 562 retval += bus_print_child_header(bus, child); 563 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 564 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 565 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 566 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 567 retval += bus_print_child_footer(bus, child); 568 569 return(retval); 570} 571 572 573/* 574 * Handle per-device ivars 575 */ 576static int 577acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 578{ 579 struct acpi_device *ad; 580 581 if ((ad = device_get_ivars(child)) == NULL) { 582 printf("device has no ivars\n"); 583 return(ENOENT); 584 } 585 586 switch(index) { 587 /* ACPI ivars */ 588 case ACPI_IVAR_HANDLE: 589 *(ACPI_HANDLE *)result = ad->ad_handle; 590 break; 591 case ACPI_IVAR_MAGIC: 592 *(int *)result = ad->ad_magic; 593 break; 594 case ACPI_IVAR_PRIVATE: 595 *(void **)result = ad->ad_private; 596 break; 597 598 /* ISA compatibility */ 599 case ISA_IVAR_VENDORID: 600 case ISA_IVAR_SERIAL: 601 case ISA_IVAR_COMPATID: 602 *(int *)result = -1; 603 break; 604 605 case ISA_IVAR_LOGICALID: 606 *(int *)result = acpi_isa_get_logicalid(child); 607 break; 608 609 default: 610 return(ENOENT); 611 } 612 return(0); 613} 614 615static int 616acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 617{ 618 struct acpi_device *ad; 619 620 if ((ad = device_get_ivars(child)) == NULL) { 621 printf("device has no ivars\n"); 622 return(ENOENT); 623 } 624 625 switch(index) { 626 /* ACPI ivars */ 627 case ACPI_IVAR_HANDLE: 628 ad->ad_handle = (ACPI_HANDLE)value; 629 break; 630 case ACPI_IVAR_MAGIC: 631 ad->ad_magic = (int )value; 632 break; 633 case ACPI_IVAR_PRIVATE: 634 ad->ad_private = (void *)value; 635 break; 636 637 default: 638 panic("bad ivar write request (%d)", index); 639 return(ENOENT); 640 } 641 return(0); 642} 643 644/* 645 * Handle child resource allocation/removal 646 */ 647static int 648acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 649{ 650 struct acpi_device *ad = device_get_ivars(child); 651 struct resource_list *rl = &ad->ad_rl; 652 653 resource_list_add(rl, type, rid, start, start + count -1, count); 654 655 return(0); 656} 657 658static int 659acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 660{ 661 struct acpi_device *ad = device_get_ivars(child); 662 struct resource_list *rl = &ad->ad_rl; 663 struct resource_list_entry *rle; 664 665 rle = resource_list_find(rl, type, rid); 666 if (!rle) 667 return(ENOENT); 668 669 if (startp) 670 *startp = rle->start; 671 if (countp) 672 *countp = rle->count; 673 674 return(0); 675} 676 677static struct resource * 678acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 679 u_long start, u_long end, u_long count, u_int flags) 680{ 681 struct acpi_device *ad = device_get_ivars(child); 682 struct resource_list *rl = &ad->ad_rl; 683 684 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 685} 686 687static int 688acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 689{ 690 struct acpi_device *ad = device_get_ivars(child); 691 struct resource_list *rl = &ad->ad_rl; 692 693 return(resource_list_release(rl, bus, child, type, rid, r)); 694} 695 696/* 697 * Handle ISA-like devices probing for a PnP ID to match. 698 */ 699#define PNP_EISAID(s) \ 700 ((((s[0] - '@') & 0x1f) << 2) \ 701 | (((s[1] - '@') & 0x18) >> 3) \ 702 | (((s[1] - '@') & 0x07) << 13) \ 703 | (((s[2] - '@') & 0x1f) << 8) \ 704 | (PNP_HEXTONUM(s[4]) << 16) \ 705 | (PNP_HEXTONUM(s[3]) << 20) \ 706 | (PNP_HEXTONUM(s[6]) << 24) \ 707 | (PNP_HEXTONUM(s[5]) << 28)) 708 709static u_int32_t 710acpi_isa_get_logicalid(device_t dev) 711{ 712 ACPI_HANDLE h; 713 ACPI_DEVICE_INFO devinfo; 714 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 715 ACPI_STATUS error; 716 u_int32_t pnpid; 717 ACPI_LOCK_DECL; 718 719 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 720 721 pnpid = 0; 722 ACPI_LOCK; 723 724 /* Fetch and validate the HID. */ 725 if ((h = acpi_get_handle(dev)) == NULL) 726 goto out; 727 error = AcpiGetObjectInfo(h, &buf); 728 if (ACPI_FAILURE(error)) 729 goto out; 730 if ((devinfo.Valid & ACPI_VALID_HID) == 0) 731 goto out; 732 733 pnpid = PNP_EISAID(devinfo.HardwareId.Value); 734out: 735 ACPI_UNLOCK; 736 return_VALUE(pnpid); 737} 738 739static u_int32_t 740acpi_isa_get_compatid(device_t dev) 741{ 742 ACPI_HANDLE h; 743 ACPI_STATUS error; 744 u_int32_t pnpid; 745 ACPI_LOCK_DECL; 746 747 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 748 749 pnpid = 0; 750 ACPI_LOCK; 751 752 /* fetch and validate the HID */ 753 if ((h = acpi_get_handle(dev)) == NULL) 754 goto out; 755 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid))) 756 goto out; 757 758out: 759 ACPI_UNLOCK; 760 return_VALUE(pnpid); 761} 762 763 764static int 765acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 766{ 767 int result; 768 u_int32_t lid, cid; 769 770 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 771 772 /* 773 * ISA-style drivers attached to ACPI may persist and 774 * probe manually if we return ENOENT. We never want 775 * that to happen, so don't ever return it. 776 */ 777 result = ENXIO; 778 779 /* scan the supplied IDs for a match */ 780 lid = acpi_isa_get_logicalid(child); 781 cid = acpi_isa_get_compatid(child); 782 while (ids && ids->ip_id) { 783 if (lid == ids->ip_id || cid == ids->ip_id) { 784 result = 0; 785 goto out; 786 } 787 ids++; 788 } 789 out: 790 return_VALUE(result); 791} 792 793/* 794 * Scan relevant portions of the ACPI namespace and attach child devices. 795 * 796 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 797 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 798 */ 799static void 800acpi_probe_children(device_t bus) 801{ 802 ACPI_HANDLE parent; 803 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 804 int i; 805 806 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 807 ACPI_ASSERTLOCK; 808 809 /* 810 * Create any static children by calling device identify methods. 811 */ 812 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 813 bus_generic_probe(bus); 814 815 /* 816 * Scan the namespace and insert placeholders for all the devices that 817 * we find. 818 * 819 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 820 * we want to create nodes for all devices, not just those that are currently 821 * present. (This assumes that we don't want to create/remove devices as they 822 * appear, which might be smarter.) 823 */ 824 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 825 for (i = 0; scopes[i] != NULL; i++) 826 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent))) 827 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 828 829 /* 830 * Scan all of the child devices we have created and let them probe/attach. 831 */ 832 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 833 bus_generic_attach(bus); 834 835 /* 836 * Some of these children may have attached others as part of their attach 837 * process (eg. the root PCI bus driver), so rescan. 838 */ 839 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 840 bus_generic_attach(bus); 841 842 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 843 return_VOID; 844} 845 846/* 847 * Evaluate a child device and determine whether we might attach a device to 848 * it. 849 */ 850static ACPI_STATUS 851acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 852{ 853 ACPI_OBJECT_TYPE type; 854 device_t child, bus = (device_t)context; 855 856 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 857 858 /* 859 * Skip this device if we think we'll have trouble with it. 860 */ 861 if (acpi_avoid(handle)) 862 return_ACPI_STATUS(AE_OK); 863 864 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 865 switch(type) { 866 case ACPI_TYPE_DEVICE: 867 case ACPI_TYPE_PROCESSOR: 868 case ACPI_TYPE_THERMAL: 869 case ACPI_TYPE_POWER: 870 if (acpi_disabled("children")) 871 break; 872 /* 873 * Create a placeholder device for this node. Sort the placeholder 874 * so that the probe/attach passes will run breadth-first. 875 */ 876 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 877 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 878 if (child == NULL) 879 break; 880 acpi_set_handle(child, handle); 881 882 /* 883 * Check that the device is present. If it's not present, 884 * leave it disabled (so that we have a device_t attached to 885 * the handle, but we don't probe it). 886 */ 887 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 888 device_disable(child); 889 break; 890 } 891 892 /* 893 * Get the device's resource settings and attach them. 894 * Note that if the device has _PRS but no _CRS, we need 895 * to decide when it's appropriate to try to configure the 896 * device. Ignore the return value here; it's OK for the 897 * device not to have any resources. 898 */ 899 acpi_parse_resources(child, handle, &acpi_res_parse_set); 900 901 /* if we're debugging, probe/attach now rather than later */ 902 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 903 break; 904 } 905 } 906 return_ACPI_STATUS(AE_OK); 907} 908 909static void 910acpi_shutdown_pre_sync(void *arg, int howto) 911{ 912 913 struct acpi_softc *sc = arg; 914 915 ACPI_ASSERTLOCK; 916 917 /* 918 * Disable all ACPI events before soft off, otherwise the system 919 * will be turned on again on some laptops. 920 * 921 * XXX this should probably be restricted to masking some events just 922 * before powering down, since we may still need ACPI during the 923 * shutdown process. 924 */ 925 if (sc->acpi_disable_on_poweroff) 926 acpi_Disable(sc); 927} 928 929static void 930acpi_shutdown_final(void *arg, int howto) 931{ 932 ACPI_STATUS status; 933 934 ACPI_ASSERTLOCK; 935 936 if (howto & RB_POWEROFF) { 937 printf("Powering system off using ACPI\n"); 938 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) { 939 printf("AcpiEnterSleepStatePrep failed - %s\n", 940 AcpiFormatException(status)); 941 return; 942 } 943 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) { 944 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 945 } else { 946 DELAY(1000000); 947 printf("ACPI power-off failed - timeout\n"); 948 } 949 } else { 950 printf("Shutting down ACPI\n"); 951 AcpiTerminate(); 952 } 953} 954 955static void 956acpi_enable_fixed_events(struct acpi_softc *sc) 957{ 958 static int first_time = 1; 959#define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 960 961 ACPI_ASSERTLOCK; 962 963 /* Enable and clear fixed events and install handlers. */ 964 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 965 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 966 acpi_eventhandler_power_button_for_sleep, sc); 967 if (first_time) { 968 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 969 } 970 } 971 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 972 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 973 acpi_eventhandler_sleep_button_for_sleep, sc); 974 if (first_time) { 975 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 976 } 977 } 978 979 first_time = 0; 980} 981 982/* 983 * Returns true if the device is actually present and should 984 * be attached to. This requires the present, enabled, UI-visible 985 * and diagnostics-passed bits to be set. 986 */ 987BOOLEAN 988acpi_DeviceIsPresent(device_t dev) 989{ 990 ACPI_HANDLE h; 991 ACPI_DEVICE_INFO devinfo; 992 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 993 ACPI_STATUS error; 994 995 ACPI_ASSERTLOCK; 996 997 if ((h = acpi_get_handle(dev)) == NULL) 998 return(FALSE); 999 error = AcpiGetObjectInfo(h, &buf); 1000 if (ACPI_FAILURE(error)) 1001 return(FALSE); 1002 /* if no _STA method, must be present */ 1003 if ((devinfo.Valid & ACPI_VALID_STA) == 0) 1004 return(TRUE); 1005 /* return true for 'present' and 'functioning' */ 1006 if ((devinfo.CurrentStatus & 0x9) == 0x9) 1007 return(TRUE); 1008 return(FALSE); 1009} 1010 1011/* 1012 * Returns true if the battery is actually present and inserted. 1013 */ 1014BOOLEAN 1015acpi_BatteryIsPresent(device_t dev) 1016{ 1017 ACPI_HANDLE h; 1018 ACPI_DEVICE_INFO devinfo; 1019 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 1020 ACPI_STATUS error; 1021 1022 ACPI_ASSERTLOCK; 1023 1024 if ((h = acpi_get_handle(dev)) == NULL) 1025 return(FALSE); 1026 error = AcpiGetObjectInfo(h, &buf); 1027 if (ACPI_FAILURE(error)) 1028 return(FALSE); 1029 /* if no _STA method, must be present */ 1030 if ((devinfo.Valid & ACPI_VALID_STA) == 0) 1031 return(TRUE); 1032 /* return true for 'present' and 'functioning' */ 1033 if ((devinfo.CurrentStatus & 0x19) == 0x19) 1034 return(TRUE); 1035 return(FALSE); 1036} 1037 1038/* 1039 * Match a HID string against a device 1040 */ 1041BOOLEAN 1042acpi_MatchHid(device_t dev, char *hid) 1043{ 1044 ACPI_HANDLE h; 1045 ACPI_DEVICE_INFO devinfo; 1046 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 1047 ACPI_STATUS error; 1048 int cid; 1049 1050 ACPI_ASSERTLOCK; 1051 1052 if (hid == NULL) 1053 return(FALSE); 1054 if ((h = acpi_get_handle(dev)) == NULL) 1055 return(FALSE); 1056 error = AcpiGetObjectInfo(h, &buf); 1057 if (ACPI_FAILURE(error)) 1058 return(FALSE); 1059 if ((devinfo.Valid & ACPI_VALID_HID) != 0 && 1060 strcmp(hid, devinfo.HardwareId.Value) == 0) 1061 return(TRUE); 1062 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid))) 1063 return(FALSE); 1064 if (cid == PNP_EISAID(hid)) 1065 return(TRUE); 1066 return(FALSE); 1067} 1068 1069/* 1070 * Return the handle of a named object within our scope, ie. that of (parent) 1071 * or one if its parents. 1072 */ 1073ACPI_STATUS 1074acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1075{ 1076 ACPI_HANDLE r; 1077 ACPI_STATUS status; 1078 1079 ACPI_ASSERTLOCK; 1080 1081 /* walk back up the tree to the root */ 1082 for (;;) { 1083 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) { 1084 *result = r; 1085 return(AE_OK); 1086 } 1087 if (status != AE_NOT_FOUND) 1088 return(AE_OK); 1089 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1090 return(AE_NOT_FOUND); 1091 parent = r; 1092 } 1093} 1094 1095/* 1096 * Allocate a buffer with a preset data size. 1097 */ 1098ACPI_BUFFER * 1099acpi_AllocBuffer(int size) 1100{ 1101 ACPI_BUFFER *buf; 1102 1103 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1104 return(NULL); 1105 buf->Length = size; 1106 buf->Pointer = (void *)(buf + 1); 1107 return(buf); 1108} 1109 1110/* 1111 * Evaluate a path that should return an integer. 1112 */ 1113ACPI_STATUS 1114acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1115{ 1116 ACPI_STATUS error; 1117 ACPI_BUFFER buf; 1118 ACPI_OBJECT param; 1119 1120 ACPI_ASSERTLOCK; 1121 1122 if (handle == NULL) 1123 handle = ACPI_ROOT_OBJECT; 1124 1125 /* 1126 * Assume that what we've been pointed at is an Integer object, or 1127 * a method that will return an Integer. 1128 */ 1129 buf.Pointer = ¶m; 1130 buf.Length = sizeof(param); 1131 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1132 if (param.Type == ACPI_TYPE_INTEGER) { 1133 *number = param.Integer.Value; 1134 } else { 1135 error = AE_TYPE; 1136 } 1137 } 1138 1139 /* 1140 * In some applications, a method that's expected to return an Integer 1141 * may instead return a Buffer (probably to simplify some internal 1142 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1143 * convert it into an Integer as best we can. 1144 * 1145 * This is a hack. 1146 */ 1147 if (error == AE_BUFFER_OVERFLOW) { 1148 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1149 error = AE_NO_MEMORY; 1150 } else { 1151 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1152 error = acpi_ConvertBufferToInteger(&buf, number); 1153 } 1154 } 1155 AcpiOsFree(buf.Pointer); 1156 } 1157 return(error); 1158} 1159 1160ACPI_STATUS 1161acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1162{ 1163 ACPI_OBJECT *p; 1164 int i; 1165 1166 p = (ACPI_OBJECT *)bufp->Pointer; 1167 if (p->Type == ACPI_TYPE_INTEGER) { 1168 *number = p->Integer.Value; 1169 return(AE_OK); 1170 } 1171 if (p->Type != ACPI_TYPE_BUFFER) 1172 return(AE_TYPE); 1173 if (p->Buffer.Length > sizeof(int)) 1174 return(AE_BAD_DATA); 1175 *number = 0; 1176 for (i = 0; i < p->Buffer.Length; i++) 1177 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1178 return(AE_OK); 1179} 1180 1181/* 1182 * Iterate over the elements of an a package object, calling the supplied 1183 * function for each element. 1184 * 1185 * XXX possible enhancement might be to abort traversal on error. 1186 */ 1187ACPI_STATUS 1188acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1189{ 1190 ACPI_OBJECT *comp; 1191 int i; 1192 1193 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1194 return(AE_BAD_PARAMETER); 1195 1196 /* iterate over components */ 1197 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1198 func(comp, arg); 1199 1200 return(AE_OK); 1201} 1202 1203/* 1204 * Find the (index)th resource object in a set. 1205 */ 1206ACPI_STATUS 1207acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1208{ 1209 ACPI_RESOURCE *rp; 1210 int i; 1211 1212 rp = (ACPI_RESOURCE *)buf->Pointer; 1213 i = index; 1214 while (i-- > 0) { 1215 /* range check */ 1216 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1217 return(AE_BAD_PARAMETER); 1218 /* check for terminator */ 1219 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1220 (rp->Length == 0)) 1221 return(AE_NOT_FOUND); 1222 rp = ACPI_RESOURCE_NEXT(rp); 1223 } 1224 if (resp != NULL) 1225 *resp = rp; 1226 return(AE_OK); 1227} 1228 1229/* 1230 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1231 * 1232 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1233 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1234 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1235 * resources. 1236 */ 1237#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1238 1239ACPI_STATUS 1240acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1241{ 1242 ACPI_RESOURCE *rp; 1243 void *newp; 1244 1245 /* 1246 * Initialise the buffer if necessary. 1247 */ 1248 if (buf->Pointer == NULL) { 1249 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1250 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1251 return(AE_NO_MEMORY); 1252 rp = (ACPI_RESOURCE *)buf->Pointer; 1253 rp->Id = ACPI_RSTYPE_END_TAG; 1254 rp->Length = 0; 1255 } 1256 if (res == NULL) 1257 return(AE_OK); 1258 1259 /* 1260 * Scan the current buffer looking for the terminator. 1261 * This will either find the terminator or hit the end 1262 * of the buffer and return an error. 1263 */ 1264 rp = (ACPI_RESOURCE *)buf->Pointer; 1265 for (;;) { 1266 /* range check, don't go outside the buffer */ 1267 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1268 return(AE_BAD_PARAMETER); 1269 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1270 (rp->Length == 0)) { 1271 break; 1272 } 1273 rp = ACPI_RESOURCE_NEXT(rp); 1274 } 1275 1276 /* 1277 * Check the size of the buffer and expand if required. 1278 * 1279 * Required size is: 1280 * size of existing resources before terminator + 1281 * size of new resource and header + 1282 * size of terminator. 1283 * 1284 * Note that this loop should really only run once, unless 1285 * for some reason we are stuffing a *really* huge resource. 1286 */ 1287 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1288 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1289 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1290 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1291 return(AE_NO_MEMORY); 1292 bcopy(buf->Pointer, newp, buf->Length); 1293 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1294 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1295 AcpiOsFree(buf->Pointer); 1296 buf->Pointer = newp; 1297 buf->Length += buf->Length; 1298 } 1299 1300 /* 1301 * Insert the new resource. 1302 */ 1303 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1304 1305 /* 1306 * And add the terminator. 1307 */ 1308 rp = ACPI_RESOURCE_NEXT(rp); 1309 rp->Id = ACPI_RSTYPE_END_TAG; 1310 rp->Length = 0; 1311 1312 return(AE_OK); 1313} 1314 1315/* 1316 * Set interrupt model. 1317 */ 1318ACPI_STATUS 1319acpi_SetIntrModel(int model) 1320{ 1321 ACPI_OBJECT_LIST ArgList; 1322 ACPI_OBJECT Arg; 1323 1324 Arg.Type = ACPI_TYPE_INTEGER; 1325 Arg.Integer.Value = model; 1326 ArgList.Count = 1; 1327 ArgList.Pointer = &Arg; 1328 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1329} 1330 1331#define ACPI_MINIMUM_AWAKETIME 5 1332 1333static void 1334acpi_sleep_enable(void *arg) 1335{ 1336 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1337} 1338 1339/* 1340 * Set the system sleep state 1341 * 1342 * Currently we only support S1 and S5 1343 */ 1344ACPI_STATUS 1345acpi_SetSleepState(struct acpi_softc *sc, int state) 1346{ 1347 ACPI_STATUS status = AE_OK; 1348 UINT8 TypeA; 1349 UINT8 TypeB; 1350 1351 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1352 ACPI_ASSERTLOCK; 1353 1354 if (sc->acpi_sstate != ACPI_STATE_S0) 1355 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */ 1356 1357 if (sc->acpi_sleep_disabled) 1358 return_ACPI_STATUS(AE_OK); 1359 1360 switch (state) { 1361 case ACPI_STATE_S0: /* XXX only for testing */ 1362 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1363 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1364 } 1365 break; 1366 1367 case ACPI_STATE_S1: 1368 case ACPI_STATE_S2: 1369 case ACPI_STATE_S3: 1370 case ACPI_STATE_S4: 1371 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) { 1372 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status)); 1373 break; 1374 } 1375 1376 sc->acpi_sstate = state; 1377 sc->acpi_sleep_disabled = 1; 1378 1379 /* 1380 * Inform all devices that we are going to sleep. 1381 */ 1382 if (DEVICE_SUSPEND(root_bus) != 0) { 1383 /* 1384 * Re-wake the system. 1385 * 1386 * XXX note that a better two-pass approach with a 'veto' pass 1387 * followed by a "real thing" pass would be better, but the 1388 * current bus interface does not provide for this. 1389 */ 1390 DEVICE_RESUME(root_bus); 1391 return_ACPI_STATUS(AE_ERROR); 1392 } 1393 1394 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) { 1395 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1396 AcpiFormatException(status)); 1397 break; 1398 } 1399 1400 if (sc->acpi_sleep_delay > 0) { 1401 DELAY(sc->acpi_sleep_delay * 1000000); 1402 } 1403 1404 if (state != ACPI_STATE_S1) { 1405 acpi_sleep_machdep(sc, state); 1406 1407 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */ 1408 if (1/*AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED*/) { 1409 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1410 } 1411 1412 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1413 if (state == ACPI_STATE_S4) { 1414 AcpiEnable(); 1415 } 1416 } else { 1417 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1418 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1419 break; 1420 } 1421 } 1422 AcpiLeaveSleepState((UINT8)state); 1423 DEVICE_RESUME(root_bus); 1424 sc->acpi_sstate = ACPI_STATE_S0; 1425 acpi_enable_fixed_events(sc); 1426 break; 1427 1428 case ACPI_STATE_S5: 1429 /* 1430 * Shut down cleanly and power off. This will call us back through the 1431 * shutdown handlers. 1432 */ 1433 shutdown_nice(RB_POWEROFF); 1434 break; 1435 1436 default: 1437 status = AE_BAD_PARAMETER; 1438 break; 1439 } 1440 1441 if (sc->acpi_sleep_disabled) 1442 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1443 1444 return_ACPI_STATUS(status); 1445} 1446 1447/* 1448 * Enable/Disable ACPI 1449 */ 1450ACPI_STATUS 1451acpi_Enable(struct acpi_softc *sc) 1452{ 1453 ACPI_STATUS status; 1454 u_int32_t flags; 1455 1456 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1457 ACPI_ASSERTLOCK; 1458 1459 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1460 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1461 if (!sc->acpi_enabled) { 1462 status = AcpiEnableSubsystem(flags); 1463 } else { 1464 status = AE_OK; 1465 } 1466 if (status == AE_OK) 1467 sc->acpi_enabled = 1; 1468 return_ACPI_STATUS(status); 1469} 1470 1471ACPI_STATUS 1472acpi_Disable(struct acpi_softc *sc) 1473{ 1474 ACPI_STATUS status; 1475 1476 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1477 ACPI_ASSERTLOCK; 1478 1479 if (sc->acpi_enabled) { 1480 status = AcpiDisable(); 1481 } else { 1482 status = AE_OK; 1483 } 1484 if (status == AE_OK) 1485 sc->acpi_enabled = 0; 1486 return_ACPI_STATUS(status); 1487} 1488 1489/* 1490 * ACPI Event Handlers 1491 */ 1492 1493/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1494 1495static void 1496acpi_system_eventhandler_sleep(void *arg, int state) 1497{ 1498 ACPI_LOCK_DECL; 1499 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1500 1501 ACPI_LOCK; 1502 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1503 acpi_SetSleepState((struct acpi_softc *)arg, state); 1504 ACPI_UNLOCK; 1505 return_VOID; 1506} 1507 1508static void 1509acpi_system_eventhandler_wakeup(void *arg, int state) 1510{ 1511 ACPI_LOCK_DECL; 1512 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1513 1514 /* Well, what to do? :-) */ 1515 1516 ACPI_LOCK; 1517 ACPI_UNLOCK; 1518 1519 return_VOID; 1520} 1521 1522/* 1523 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1524 */ 1525UINT32 1526acpi_eventhandler_power_button_for_sleep(void *context) 1527{ 1528 struct acpi_softc *sc = (struct acpi_softc *)context; 1529 1530 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1531 1532 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1533 1534 return_VALUE(ACPI_INTERRUPT_HANDLED); 1535} 1536 1537UINT32 1538acpi_eventhandler_power_button_for_wakeup(void *context) 1539{ 1540 struct acpi_softc *sc = (struct acpi_softc *)context; 1541 1542 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1543 1544 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1545 1546 return_VALUE(ACPI_INTERRUPT_HANDLED); 1547} 1548 1549UINT32 1550acpi_eventhandler_sleep_button_for_sleep(void *context) 1551{ 1552 struct acpi_softc *sc = (struct acpi_softc *)context; 1553 1554 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1555 1556 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1557 1558 return_VALUE(ACPI_INTERRUPT_HANDLED); 1559} 1560 1561UINT32 1562acpi_eventhandler_sleep_button_for_wakeup(void *context) 1563{ 1564 struct acpi_softc *sc = (struct acpi_softc *)context; 1565 1566 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1567 1568 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1569 1570 return_VALUE(ACPI_INTERRUPT_HANDLED); 1571} 1572 1573/* 1574 * XXX This is kinda ugly, and should not be here. 1575 */ 1576struct acpi_staticbuf { 1577 ACPI_BUFFER buffer; 1578 char data[512]; 1579}; 1580 1581char * 1582acpi_name(ACPI_HANDLE handle) 1583{ 1584 static struct acpi_staticbuf buf; 1585 1586 ACPI_ASSERTLOCK; 1587 1588 buf.buffer.Length = 512; 1589 buf.buffer.Pointer = &buf.data[0]; 1590 1591 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1592 return(buf.buffer.Pointer); 1593 return("(unknown path)"); 1594} 1595 1596/* 1597 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1598 * parts of the namespace. 1599 */ 1600int 1601acpi_avoid(ACPI_HANDLE handle) 1602{ 1603 char *cp, *env, *np; 1604 int len; 1605 1606 np = acpi_name(handle); 1607 if (*np == '\\') 1608 np++; 1609 if ((env = getenv("debug.acpi.avoid")) == NULL) 1610 return(0); 1611 1612 /* scan the avoid list checking for a match */ 1613 cp = env; 1614 for (;;) { 1615 while ((*cp != 0) && isspace(*cp)) 1616 cp++; 1617 if (*cp == 0) 1618 break; 1619 len = 0; 1620 while ((cp[len] != 0) && !isspace(cp[len])) 1621 len++; 1622 if (!strncmp(cp, np, len)) { 1623 freeenv(env); 1624 return(1); 1625 } 1626 cp += len; 1627 } 1628 freeenv(env); 1629 return(0); 1630} 1631 1632/* 1633 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1634 */ 1635int 1636acpi_disabled(char *subsys) 1637{ 1638 char *cp, *env; 1639 int len; 1640 1641 if ((env = getenv("debug.acpi.disable")) == NULL) 1642 return(0); 1643 if (!strcmp(env, "all")) { 1644 freeenv(env); 1645 return(1); 1646 } 1647 1648 /* scan the disable list checking for a match */ 1649 cp = env; 1650 for (;;) { 1651 while ((*cp != 0) && isspace(*cp)) 1652 cp++; 1653 if (*cp == 0) 1654 break; 1655 len = 0; 1656 while ((cp[len] != 0) && !isspace(cp[len])) 1657 len++; 1658 if (!strncmp(cp, subsys, len)) { 1659 freeenv(env); 1660 return(1); 1661 } 1662 cp += len; 1663 } 1664 freeenv(env); 1665 return(0); 1666} 1667 1668/* 1669 * Device wake capability enable/disable. 1670 */ 1671void 1672acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1673{ 1674 ACPI_OBJECT_LIST ArgList; 1675 ACPI_OBJECT Arg; 1676 1677 /* 1678 * TBD: All Power Resources referenced by elements 2 through N 1679 * of the _PRW object are put into the ON state. 1680 */ 1681 1682 /* 1683 * enable/disable device wake function. 1684 */ 1685 1686 ArgList.Count = 1; 1687 ArgList.Pointer = &Arg; 1688 1689 Arg.Type = ACPI_TYPE_INTEGER; 1690 Arg.Integer.Value = enable; 1691 1692 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1693} 1694 1695void 1696acpi_device_enable_wake_event(ACPI_HANDLE h) 1697{ 1698 struct acpi_softc *sc; 1699 ACPI_STATUS status; 1700 ACPI_BUFFER prw_buffer; 1701 ACPI_OBJECT *res; 1702 1703 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1704 1705 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) { 1706 return; 1707 } 1708 1709 /* 1710 * _PRW object is only required for devices that have the ability 1711 * to wake the system from a system sleeping state. 1712 */ 1713 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1714 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1715 if (ACPI_FAILURE(status)) { 1716 return; 1717 } 1718 1719 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1720 if (res == NULL) { 1721 return; 1722 } 1723 1724 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1725 goto out; 1726 } 1727 1728 /* 1729 * The element 1 of the _PRW object: 1730 * The lowest power system sleeping state that can be entered 1731 * while still providing wake functionality. 1732 * The sleeping state being entered must be greater or equal to 1733 * the power state declared in element 1 of the _PRW object. 1734 */ 1735 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) { 1736 goto out; 1737 } 1738 1739 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) { 1740 goto out; 1741 } 1742 1743 /* 1744 * The element 0 of the _PRW object: 1745 */ 1746 switch(res->Package.Elements[0].Type) { 1747 case ACPI_TYPE_INTEGER: 1748 /* 1749 * If the data type of this package element is numeric, then this 1750 * _PRW package element is the bit index in the GPEx_EN, in the 1751 * GPE blocks described in the FADT, of the enable bit that is 1752 * enabled for the wake event. 1753 */ 1754 1755 status = AcpiEnableGpe(NULL, res->Package.Elements[0].Integer.Value, 1756 ACPI_EVENT_WAKE_ENABLE); 1757 if (ACPI_FAILURE(status)) 1758 printf("%s: EnableEvent Failed\n", __func__); 1759 break; 1760 1761 case ACPI_TYPE_PACKAGE: 1762 /* XXX TBD */ 1763 1764 /* 1765 * If the data type of this package element is a package, then this 1766 * _PRW package element is itself a package containing two 1767 * elements. The first is an object reference to the GPE Block 1768 * device that contains the GPE that will be triggered by the wake 1769 * event. The second element is numeric and it contains the bit 1770 * index in the GPEx_EN, in the GPE Block referenced by the 1771 * first element in the package, of the enable bit that is enabled for 1772 * the wake event. 1773 * For example, if this field is a package then it is of the form: 1774 * Package() {\_SB.PCI0.ISA.GPE, 2} 1775 */ 1776 1777 break; 1778 1779 default: 1780 break; 1781 } 1782 1783out: 1784 if (prw_buffer.Pointer != NULL) 1785 AcpiOsFree(prw_buffer.Pointer); 1786 return; 1787} 1788 1789/* 1790 * Control interface. 1791 * 1792 * We multiplex ioctls for all participating ACPI devices here. Individual 1793 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1794 * interface to make their handlers visible. 1795 */ 1796struct acpi_ioctl_hook 1797{ 1798 TAILQ_ENTRY(acpi_ioctl_hook) link; 1799 u_long cmd; 1800 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1801 void *arg; 1802}; 1803 1804static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1805static int acpi_ioctl_hooks_initted; 1806 1807/* 1808 * Register an ioctl handler. 1809 */ 1810int 1811acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1812{ 1813 struct acpi_ioctl_hook *hp; 1814 1815 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1816 return(ENOMEM); 1817 hp->cmd = cmd; 1818 hp->fn = fn; 1819 hp->arg = arg; 1820 if (acpi_ioctl_hooks_initted == 0) { 1821 TAILQ_INIT(&acpi_ioctl_hooks); 1822 acpi_ioctl_hooks_initted = 1; 1823 } 1824 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1825 return(0); 1826} 1827 1828/* 1829 * Deregister an ioctl handler. 1830 */ 1831void 1832acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1833{ 1834 struct acpi_ioctl_hook *hp; 1835 1836 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1837 if ((hp->cmd == cmd) && (hp->fn == fn)) 1838 break; 1839 1840 if (hp != NULL) { 1841 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1842 free(hp, M_ACPIDEV); 1843 } 1844} 1845 1846static int 1847acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 1848{ 1849 return(0); 1850} 1851 1852static int 1853acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 1854{ 1855 return(0); 1856} 1857 1858static int 1859acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 1860{ 1861 struct acpi_softc *sc; 1862 struct acpi_ioctl_hook *hp; 1863 int error, xerror, state; 1864 ACPI_LOCK_DECL; 1865 1866 ACPI_LOCK; 1867 1868 error = state = 0; 1869 sc = dev->si_drv1; 1870 1871 /* 1872 * Scan the list of registered ioctls, looking for handlers. 1873 */ 1874 if (acpi_ioctl_hooks_initted) { 1875 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1876 if (hp->cmd == cmd) { 1877 xerror = hp->fn(cmd, addr, hp->arg); 1878 if (xerror != 0) 1879 error = xerror; 1880 goto out; 1881 } 1882 } 1883 } 1884 1885 /* 1886 * Core ioctls are not permitted for non-writable user. 1887 * Currently, other ioctls just fetch information. 1888 * Not changing system behavior. 1889 */ 1890 if(!(flag & FWRITE)){ 1891 return EPERM; 1892 } 1893 1894 /* 1895 * Core system ioctls. 1896 */ 1897 switch (cmd) { 1898 case ACPIIO_ENABLE: 1899 if (ACPI_FAILURE(acpi_Enable(sc))) 1900 error = ENXIO; 1901 break; 1902 1903 case ACPIIO_DISABLE: 1904 if (ACPI_FAILURE(acpi_Disable(sc))) 1905 error = ENXIO; 1906 break; 1907 1908 case ACPIIO_SETSLPSTATE: 1909 if (!sc->acpi_enabled) { 1910 error = ENXIO; 1911 break; 1912 } 1913 state = *(int *)addr; 1914 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1915 acpi_SetSleepState(sc, state); 1916 } else { 1917 error = EINVAL; 1918 } 1919 break; 1920 1921 default: 1922 if (error == 0) 1923 error = EINVAL; 1924 break; 1925 } 1926 1927out: 1928 ACPI_UNLOCK; 1929 return(error); 1930} 1931 1932static int 1933acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1934{ 1935 char sleep_state[4]; 1936 char buf[16]; 1937 int error; 1938 UINT8 state, TypeA, TypeB; 1939 1940 buf[0] = '\0'; 1941 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 1942 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 1943 sprintf(sleep_state, "S%d ", state); 1944 strcat(buf, sleep_state); 1945 } 1946 } 1947 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 1948 return(error); 1949} 1950 1951static int 1952acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1953{ 1954 char sleep_state[10]; 1955 int error; 1956 u_int new_state, old_state; 1957 1958 old_state = *(u_int *)oidp->oid_arg1; 1959 if (old_state > ACPI_S_STATES_MAX+1) { 1960 strcpy(sleep_state, "unknown"); 1961 } else { 1962 bzero(sleep_state, sizeof(sleep_state)); 1963 strncpy(sleep_state, sleep_state_names[old_state], 1964 sizeof(sleep_state_names[old_state])); 1965 } 1966 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1967 if (error == 0 && req->newptr != NULL) { 1968 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) { 1969 if (strncmp(sleep_state, sleep_state_names[new_state], 1970 sizeof(sleep_state)) == 0) 1971 break; 1972 } 1973 if (new_state <= ACPI_S_STATES_MAX+1) { 1974 if (new_state != old_state) { 1975 *(u_int *)oidp->oid_arg1 = new_state; 1976 } 1977 } else { 1978 error = EINVAL; 1979 } 1980 } 1981 return(error); 1982} 1983 1984#ifdef ACPI_DEBUG 1985/* 1986 * Support for parsing debug options from the kernel environment. 1987 * 1988 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1989 * by specifying the names of the bits in the debug.acpi.layer and 1990 * debug.acpi.level environment variables. Bits may be unset by 1991 * prefixing the bit name with !. 1992 */ 1993struct debugtag 1994{ 1995 char *name; 1996 UINT32 value; 1997}; 1998 1999static struct debugtag dbg_layer[] = { 2000 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2001 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2002 {"ACPI_EVENTS", ACPI_EVENTS}, 2003 {"ACPI_TABLES", ACPI_TABLES}, 2004 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2005 {"ACPI_PARSER", ACPI_PARSER}, 2006 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2007 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2008 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2009 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2010 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2011 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2012 2013 {"ACPI_BUS", ACPI_BUS}, 2014 {"ACPI_SYSTEM", ACPI_SYSTEM}, 2015 {"ACPI_POWER", ACPI_POWER}, 2016 {"ACPI_EC", ACPI_EC}, 2017 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2018 {"ACPI_BATTERY", ACPI_BATTERY}, 2019 {"ACPI_BUTTON", ACPI_BUTTON}, 2020 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2021 {"ACPI_THERMAL", ACPI_THERMAL}, 2022 {"ACPI_FAN", ACPI_FAN}, 2023 2024 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2025 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2026 {NULL, 0} 2027}; 2028 2029static struct debugtag dbg_level[] = { 2030 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2031 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2032 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2033 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2034 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2035 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2036 2037 /* Trace verbosity level 1 [Standard Trace Level] */ 2038 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2039 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2040 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2041 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2042 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2043 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2044 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2045 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2046 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2047 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2048 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2049 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2050 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2051 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2052 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2053 2054 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2055 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2056 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2057 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2058 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2059 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2060 2061 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2062 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2063 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2064 {"ACPI_LV_IO", ACPI_LV_IO}, 2065 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2066 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2067 2068 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2069 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2070 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2071 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2072 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2073 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2074 {NULL, 0} 2075}; 2076 2077static void 2078acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2079{ 2080 char *ep; 2081 int i, l; 2082 int set; 2083 2084 while (*cp) { 2085 if (isspace(*cp)) { 2086 cp++; 2087 continue; 2088 } 2089 ep = cp; 2090 while (*ep && !isspace(*ep)) 2091 ep++; 2092 if (*cp == '!') { 2093 set = 0; 2094 cp++; 2095 if (cp == ep) 2096 continue; 2097 } else { 2098 set = 1; 2099 } 2100 l = ep - cp; 2101 for (i = 0; tag[i].name != NULL; i++) { 2102 if (!strncmp(cp, tag[i].name, l)) { 2103 if (set) { 2104 *flag |= tag[i].value; 2105 } else { 2106 *flag &= ~tag[i].value; 2107 } 2108 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2109 } 2110 } 2111 cp = ep; 2112 } 2113} 2114 2115static void 2116acpi_set_debugging(void *junk) 2117{ 2118 char *cp; 2119 2120 if (!cold) 2121 return; 2122 2123 AcpiDbgLayer = 0; 2124 AcpiDbgLevel = 0; 2125 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2126 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2127 freeenv(cp); 2128 } 2129 if ((cp = getenv("debug.acpi.level")) != NULL) { 2130 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2131 freeenv(cp); 2132 } 2133 2134 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 2135} 2136SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 2137#endif 2138 2139static int 2140acpi_pm_func(u_long cmd, void *arg, ...) 2141{ 2142 int state, acpi_state; 2143 int error; 2144 struct acpi_softc *sc; 2145 va_list ap; 2146 2147 error = 0; 2148 switch (cmd) { 2149 case POWER_CMD_SUSPEND: 2150 sc = (struct acpi_softc *)arg; 2151 if (sc == NULL) { 2152 error = EINVAL; 2153 goto out; 2154 } 2155 2156 va_start(ap, arg); 2157 state = va_arg(ap, int); 2158 va_end(ap); 2159 2160 switch (state) { 2161 case POWER_SLEEP_STATE_STANDBY: 2162 acpi_state = sc->acpi_standby_sx; 2163 break; 2164 case POWER_SLEEP_STATE_SUSPEND: 2165 acpi_state = sc->acpi_suspend_sx; 2166 break; 2167 case POWER_SLEEP_STATE_HIBERNATE: 2168 acpi_state = ACPI_STATE_S4; 2169 break; 2170 default: 2171 error = EINVAL; 2172 goto out; 2173 } 2174 2175 acpi_SetSleepState(sc, acpi_state); 2176 break; 2177 2178 default: 2179 error = EINVAL; 2180 goto out; 2181 } 2182 2183out: 2184 return (error); 2185} 2186 2187static void 2188acpi_pm_register(void *arg) 2189{ 2190 2191 if (!cold) 2192 return; 2193 2194 if (resource_disabled("acpi", 0)) 2195 return; 2196 2197 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2198} 2199 2200SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2201 2202