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 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 46 #include <machine/clock.h> 47 48 #include <machine/resource.h> 49 50 #include "acpi.h" 51 52 #include <dev/acpica/acpivar.h> 53 #include <dev/acpica/acpiio.h> 54 55 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 56 57 /* 58 * Hooks for the ACPI CA debugging infrastructure 59 */ 60 #define _COMPONENT ACPI_BUS_MANAGER 61 MODULE_NAME("ACPI") 62 63 /* 64 * Character device 65 */ 66 67 static d_open_t acpiopen; 68 static d_close_t acpiclose; 69 static d_ioctl_t acpiioctl; 70 71 #define CDEV_MAJOR 152 72 static struct cdevsw acpi_cdevsw = { 73 acpiopen, 74 acpiclose, 75 noread, 76 nowrite, 77 acpiioctl, 78 nopoll, 79 nommap, 80 nostrategy, 81 "acpi", 82 CDEV_MAJOR, 83 nodump, 84 nopsize, 85 0 86 }; 87 88 static const char* sleep_state_names[] = { 89 "S0", "S1", "S2", "S3", "S4", "S4B", "S5" }; 90 91 /* this has to be static, as the softc is gone when we need it */ 92 static int acpi_off_state = ACPI_STATE_S5; 93 94 static void acpi_identify(driver_t *driver, device_t parent); 95 static int acpi_probe(device_t dev); 96 static int acpi_attach(device_t dev); 97 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 98 static int acpi_print_resources(struct resource_list *rl, const char *name, int type, 99 const char *format); 100 static int acpi_print_child(device_t bus, device_t child); 101 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 102 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 103 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 104 u_long count); 105 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 106 u_long *countp); 107 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 108 u_long start, u_long end, u_long count, u_int flags); 109 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 110 111 static void acpi_probe_children(device_t bus); 112 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 113 114 static void acpi_shutdown_pre_sync(void *arg, int howto); 115 static void acpi_shutdown_final(void *arg, int howto); 116 117 static void acpi_enable_fixed_events(struct acpi_softc *sc); 118 119 static void acpi_system_eventhandler_sleep(void *arg, int state); 120 static void acpi_system_eventhandler_wakeup(void *arg, int state); 121 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 122 123 static device_method_t acpi_methods[] = { 124 /* Device interface */ 125 DEVMETHOD(device_identify, acpi_identify), 126 DEVMETHOD(device_probe, acpi_probe), 127 DEVMETHOD(device_attach, acpi_attach), 128 DEVMETHOD(device_shutdown, bus_generic_shutdown), 129 DEVMETHOD(device_suspend, bus_generic_suspend), 130 DEVMETHOD(device_resume, bus_generic_resume), 131 132 /* Bus interface */ 133 DEVMETHOD(bus_add_child, acpi_add_child), 134 DEVMETHOD(bus_print_child, acpi_print_child), 135 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 136 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 137 DEVMETHOD(bus_set_resource, acpi_set_resource), 138 DEVMETHOD(bus_get_resource, acpi_get_resource), 139 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 140 DEVMETHOD(bus_release_resource, acpi_release_resource), 141 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 142 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 143 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 144 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 145 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 146 147 {0, 0} 148 }; 149 150 static driver_t acpi_driver = { 151 "acpi", 152 acpi_methods, 153 sizeof(struct acpi_softc), 154 }; 155 156 devclass_t acpi_devclass; 157 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, 0, 0); 158 159 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 160 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 161 162 /* 163 * Detect ACPI, perform early initialisation 164 */ 165 static void 166 acpi_identify(driver_t *driver, device_t parent) 167 { 168 device_t child; 169 ACPI_PHYSICAL_ADDRESS rsdp; 170 int error; 171 #ifdef ENABLE_DEBUGGER 172 char *debugpoint = getenv("debug.acpi.debugger"); 173 #endif 174 175 FUNCTION_TRACE(__func__); 176 177 if(!cold){ 178 printf("Don't load this driver from userland!!\n"); 179 return ; 180 } 181 182 /* 183 * Make sure we're not being doubly invoked. 184 */ 185 if (device_find_child(parent, "acpi", 0) != NULL) 186 return_VOID; 187 188 /* 189 * Start up the ACPI CA subsystem. 190 */ 191 #ifdef ENABLE_DEBUGGER 192 if (debugpoint && !strcmp(debugpoint, "init")) 193 acpi_EnterDebugger(); 194 #endif 195 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 196 printf("ACPI: initialisation failed: %s\n", acpi_strerror(error)); 197 return_VOID; 198 } 199 #ifdef ENABLE_DEBUGGER 200 if (debugpoint && !strcmp(debugpoint, "tables")) 201 acpi_EnterDebugger(); 202 #endif 203 if (((error = AcpiFindRootPointer(&rsdp)) != AE_OK) || 204 ((error = AcpiLoadTables(rsdp)) != AE_OK)) { 205 printf("ACPI: table load failed: %s\n", acpi_strerror(error)); 206 return_VOID; 207 } 208 209 /* 210 * Attach the actual ACPI device. 211 */ 212 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 213 device_printf(parent, "ACPI: could not attach\n"); 214 return_VOID; 215 } 216 } 217 218 /* 219 * Fetch some descriptive data from ACPI to put in our attach message 220 */ 221 static int 222 acpi_probe(device_t dev) 223 { 224 ACPI_TABLE_HEADER th; 225 char buf[20]; 226 int error; 227 228 FUNCTION_TRACE(__func__); 229 230 if ((error = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) { 231 device_printf(dev, "couldn't get XSDT header: %s\n", acpi_strerror(error)); 232 return_VALUE(ENXIO); 233 } 234 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 235 device_set_desc_copy(dev, buf); 236 237 return_VALUE(0); 238 } 239 240 static int 241 acpi_attach(device_t dev) 242 { 243 struct acpi_softc *sc; 244 int error; 245 #ifdef ENABLE_DEBUGGER 246 char *debugpoint = getenv("debug.acpi.debugger"); 247 #endif 248 249 FUNCTION_TRACE(__func__); 250 251 sc = device_get_softc(dev); 252 bzero(sc, sizeof(*sc)); 253 sc->acpi_dev = dev; 254 255 #ifdef ENABLE_DEBUGGER 256 if (debugpoint && !strcmp(debugpoint, "spaces")) 257 acpi_EnterDebugger(); 258 #endif 259 260 /* 261 * Install the default address space handlers. 262 */ 263 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 264 ACPI_ADR_SPACE_SYSTEM_MEMORY, 265 ACPI_DEFAULT_HANDLER, 266 NULL, NULL)) != AE_OK) { 267 device_printf(dev, "could not initialise SystemMemory handler: %s\n", acpi_strerror(error)); 268 return_VALUE(ENXIO); 269 } 270 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 271 ACPI_ADR_SPACE_SYSTEM_IO, 272 ACPI_DEFAULT_HANDLER, 273 NULL, NULL)) != AE_OK) { 274 device_printf(dev, "could not initialise SystemIO handler: %s\n", acpi_strerror(error)); 275 return_VALUE(ENXIO); 276 } 277 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 278 ACPI_ADR_SPACE_PCI_CONFIG, 279 ACPI_DEFAULT_HANDLER, 280 NULL, NULL)) != AE_OK) { 281 device_printf(dev, "could not initialise PciConfig handler: %s\n", acpi_strerror(error)); 282 return_VALUE(ENXIO); 283 } 284 285 /* 286 * Bring ACPI fully online. 287 * 288 * Note that we request that device _STA and _INI methods not be run (ACPI_NO_DEVICE_INIT) 289 * and the final object initialisation pass be skipped (ACPI_NO_OBJECT_INIT). 290 * 291 * XXX We need to arrange for the object init pass after we have attached all our 292 * child devices. 293 */ 294 #ifdef ENABLE_DEBUGGER 295 if (debugpoint && !strcmp(debugpoint, "enable")) 296 acpi_EnterDebugger(); 297 #endif 298 if ((error = AcpiEnableSubsystem(ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT)) != AE_OK) { 299 device_printf(dev, "could not enable ACPI: %s\n", acpi_strerror(error)); 300 return_VALUE(ENXIO); 301 } 302 303 /* 304 * Setup our sysctl tree. 305 * 306 * XXX: This doesn't check to make sure that none of these fail. 307 */ 308 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 309 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 310 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 311 device_get_name(dev), CTLFLAG_RD, 0, ""); 312 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 313 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 314 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 315 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 316 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 317 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 318 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 319 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 320 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 321 322 /* 323 * Dispatch the default sleep state to devices. 324 * TBD: should be configured from userland policy manager. 325 */ 326 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 327 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 328 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 329 330 acpi_enable_fixed_events(sc); 331 332 /* 333 * Scan the namespace and attach/initialise children. 334 */ 335 #ifdef ENABLE_DEBUGGER 336 if (debugpoint && !strcmp(debugpoint, "probe")) 337 acpi_EnterDebugger(); 338 #endif 339 if (!acpi_disabled("bus")) 340 acpi_probe_children(dev); 341 342 /* 343 * Register our shutdown handlers 344 */ 345 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 346 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 347 348 /* 349 * Register our acpi event handlers. 350 * XXX should be configurable eg. via userland policy manager. 351 */ 352 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 353 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 354 355 /* 356 * Flag our initial states. 357 */ 358 sc->acpi_enabled = 1; 359 sc->acpi_sstate = ACPI_STATE_S0; 360 361 /* 362 * Create the control device 363 */ 364 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 365 sc->acpi_dev_t->si_drv1 = sc; 366 367 #ifdef ENABLE_DEBUGGER 368 if (debugpoint && !strcmp(debugpoint, "running")) 369 acpi_EnterDebugger(); 370 #endif 371 return_VALUE(0); 372 } 373 374 /* 375 * Handle a new device being added 376 */ 377 static device_t 378 acpi_add_child(device_t bus, int order, const char *name, int unit) 379 { 380 struct acpi_device *ad; 381 device_t child; 382 383 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 384 return(NULL); 385 bzero(ad, sizeof(*ad)); 386 387 resource_list_init(&ad->ad_rl); 388 389 child = device_add_child_ordered(bus, order, name, unit); 390 if (child != NULL) 391 device_set_ivars(child, ad); 392 return(child); 393 } 394 395 /* 396 * Print child device resource usage 397 */ 398 static int 399 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 400 { 401 struct resource_list_entry *rle; 402 int printed, retval; 403 404 printed = 0; 405 retval = 0; 406 407 if (!SLIST_FIRST(rl)) 408 return(0); 409 410 /* Yes, this is kinda cheating */ 411 SLIST_FOREACH(rle, rl, link) { 412 if (rle->type == type) { 413 if (printed == 0) 414 retval += printf(" %s ", name); 415 else if (printed > 0) 416 retval += printf(","); 417 printed++; 418 retval += printf(format, rle->start); 419 if (rle->count > 1) { 420 retval += printf("-"); 421 retval += printf(format, rle->start + 422 rle->count - 1); 423 } 424 } 425 } 426 return(retval); 427 } 428 429 static int 430 acpi_print_child(device_t bus, device_t child) 431 { 432 struct acpi_device *adev = device_get_ivars(child); 433 struct resource_list *rl = &adev->ad_rl; 434 int retval = 0; 435 436 retval += bus_print_child_header(bus, child); 437 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 438 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 439 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 440 retval += bus_print_child_footer(bus, child); 441 442 return(retval); 443 } 444 445 446 /* 447 * Handle per-device ivars 448 */ 449 static int 450 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 451 { 452 struct acpi_device *ad; 453 454 if ((ad = device_get_ivars(child)) == NULL) { 455 printf("device has no ivars\n"); 456 return(ENOENT); 457 } 458 459 switch(index) { 460 /* ACPI ivars */ 461 case ACPI_IVAR_HANDLE: 462 *(ACPI_HANDLE *)result = ad->ad_handle; 463 break; 464 case ACPI_IVAR_MAGIC: 465 *(int *)result = ad->ad_magic; 466 break; 467 case ACPI_IVAR_PRIVATE: 468 *(void **)result = ad->ad_private; 469 break; 470 471 default: 472 panic("bad ivar read request (%d)\n", index); 473 return(ENOENT); 474 } 475 return(0); 476 } 477 478 static int 479 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 480 { 481 struct acpi_device *ad; 482 483 if ((ad = device_get_ivars(child)) == NULL) { 484 printf("device has no ivars\n"); 485 return(ENOENT); 486 } 487 488 switch(index) { 489 /* ACPI ivars */ 490 case ACPI_IVAR_HANDLE: 491 ad->ad_handle = (ACPI_HANDLE)value; 492 break; 493 case ACPI_IVAR_MAGIC: 494 ad->ad_magic = (int )value; 495 break; 496 case ACPI_IVAR_PRIVATE: 497 ad->ad_private = (void *)value; 498 break; 499 500 default: 501 panic("bad ivar write request (%d)\n", index); 502 return(ENOENT); 503 } 504 return(0); 505 } 506 507 /* 508 * Handle child resource allocation/removal 509 */ 510 static int 511 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 512 { 513 struct acpi_device *ad = device_get_ivars(child); 514 struct resource_list *rl = &ad->ad_rl; 515 516 resource_list_add(rl, type, rid, start, start + count -1, count); 517 518 return(0); 519 } 520 521 static int 522 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 523 { 524 struct acpi_device *ad = device_get_ivars(child); 525 struct resource_list *rl = &ad->ad_rl; 526 struct resource_list_entry *rle; 527 528 rle = resource_list_find(rl, type, rid); 529 if (!rle) 530 return(ENOENT); 531 532 if (startp) 533 *startp = rle->start; 534 if (countp) 535 *countp = rle->count; 536 537 return(0); 538 } 539 540 static struct resource * 541 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 542 u_long start, u_long end, u_long count, u_int flags) 543 { 544 struct acpi_device *ad = device_get_ivars(child); 545 struct resource_list *rl = &ad->ad_rl; 546 547 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 548 } 549 550 static int 551 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 552 { 553 struct acpi_device *ad = device_get_ivars(child); 554 struct resource_list *rl = &ad->ad_rl; 555 556 return(resource_list_release(rl, bus, child, type, rid, r)); 557 } 558 559 /* 560 * Scan relevant portions of the ACPI namespace and attach child devices. 561 * 562 * Note that we only expect to find devices in the \_TZ_, \_SI_ and \_SB_ scopes, 563 * and \_TZ_ becomes obsolete in the ACPI 2.0 spec. 564 */ 565 static void 566 acpi_probe_children(device_t bus) 567 { 568 ACPI_HANDLE parent; 569 static char *scopes[] = {"\\_TZ_", "\\_SI", "\\_SB_", NULL}; 570 int i; 571 572 FUNCTION_TRACE(__func__); 573 574 /* 575 * Create any static children by calling device identify methods. 576 */ 577 DEBUG_PRINT(TRACE_OBJECTS, ("device identify routines\n")); 578 bus_generic_probe(bus); 579 580 /* 581 * Scan the namespace and insert placeholders for all the devices that 582 * we find. 583 * 584 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 585 * we want to create nodes for all devices, not just those that are currently 586 * present. (This assumes that we don't want to create/remove devices as they 587 * appear, which might be smarter.) 588 */ 589 DEBUG_PRINT(TRACE_OBJECTS, ("namespace scan\n")); 590 for (i = 0; scopes[i] != NULL; i++) 591 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 592 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 593 594 /* 595 * Scan all of the child devices we have created and let them probe/attach. 596 */ 597 DEBUG_PRINT(TRACE_OBJECTS, ("first bus_generic_attach\n")); 598 bus_generic_attach(bus); 599 600 /* 601 * Some of these children may have attached others as part of their attach 602 * process (eg. the root PCI bus driver), so rescan. 603 */ 604 DEBUG_PRINT(TRACE_OBJECTS, ("second bus_generic_attach\n")); 605 bus_generic_attach(bus); 606 607 return_VOID; 608 } 609 610 /* 611 * Evaluate a child device and determine whether we might attach a device to 612 * it. 613 */ 614 static ACPI_STATUS 615 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 616 { 617 ACPI_OBJECT_TYPE type; 618 device_t child, bus = (device_t)context; 619 620 FUNCTION_TRACE(__func__); 621 622 /* 623 * Skip this device if we think we'll have trouble with it. 624 */ 625 if (acpi_avoid(handle)) 626 return_ACPI_STATUS(AE_OK); 627 628 if (AcpiGetType(handle, &type) == AE_OK) { 629 switch(type) { 630 case ACPI_TYPE_DEVICE: 631 case ACPI_TYPE_PROCESSOR: 632 case ACPI_TYPE_THERMAL: 633 case ACPI_TYPE_POWER: 634 if (acpi_disabled("children")) 635 break; 636 /* 637 * Create a placeholder device for this node. Sort the placeholder 638 * so that the probe/attach passes will run breadth-first. 639 */ 640 DEBUG_PRINT(TRACE_OBJECTS, ("scanning '%s'\n", acpi_name(handle))) 641 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 642 acpi_set_handle(child, handle); 643 DEBUG_EXEC(device_probe_and_attach(child)); 644 break; 645 } 646 } 647 return_ACPI_STATUS(AE_OK); 648 } 649 650 static void 651 acpi_shutdown_pre_sync(void *arg, int howto) 652 { 653 /* 654 * Disable all ACPI events before soft off, otherwise the system 655 * will be turned on again on some laptops. 656 * 657 * XXX this should probably be restricted to masking some events just 658 * before powering down, since we may still need ACPI during the 659 * shutdown process. 660 */ 661 acpi_Disable((struct acpi_softc *)arg); 662 } 663 664 static void 665 acpi_shutdown_final(void *arg, int howto) 666 { 667 ACPI_STATUS status; 668 669 if (howto & RB_POWEROFF) { 670 printf("Power system off using ACPI...\n"); 671 if ((status = AcpiEnterSleepState(acpi_off_state)) != AE_OK) { 672 printf("ACPI power-off failed - %s\n", acpi_strerror(status)); 673 } else { 674 DELAY(1000000); 675 printf("ACPI power-off failed - timeout\n"); 676 } 677 } 678 } 679 680 static void 681 acpi_enable_fixed_events(struct acpi_softc *sc) 682 { 683 static int first_time = 1; 684 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 685 686 /* Enable and clear fixed events and install handlers. */ 687 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 688 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 689 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 690 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 691 acpi_eventhandler_power_button_for_sleep, sc); 692 if (first_time) { 693 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 694 } 695 } 696 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 697 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 698 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 699 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 700 acpi_eventhandler_sleep_button_for_sleep, sc); 701 if (first_time) { 702 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 703 } 704 } 705 706 first_time = 0; 707 } 708 709 /* 710 * Match a HID string against a device 711 */ 712 BOOLEAN 713 acpi_MatchHid(device_t dev, char *hid) 714 { 715 ACPI_HANDLE h; 716 ACPI_DEVICE_INFO devinfo; 717 ACPI_STATUS error; 718 719 if (hid == NULL) 720 return(FALSE); 721 if ((h = acpi_get_handle(dev)) == NULL) 722 return(FALSE); 723 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 724 return(FALSE); 725 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 726 return(TRUE); 727 return(FALSE); 728 } 729 730 /* 731 * Perform the tedious double-get procedure required for fetching something into 732 * an ACPI_BUFFER that has not been initialised. 733 */ 734 ACPI_STATUS 735 acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 736 { 737 ACPI_STATUS status; 738 739 buf->Length = 0; 740 buf->Pointer = NULL; 741 742 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 743 return(status); 744 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 745 return(AE_NO_MEMORY); 746 return(func(handle, buf)); 747 } 748 749 /* 750 * Allocate a buffer with a preset data size. 751 */ 752 ACPI_BUFFER * 753 acpi_AllocBuffer(int size) 754 { 755 ACPI_BUFFER *buf; 756 757 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 758 return(NULL); 759 buf->Length = size; 760 buf->Pointer = (void *)(buf + 1); 761 return(buf); 762 } 763 764 static ACPI_STATUS __inline 765 acpi_wakeup(UINT8 state) 766 { 767 UINT16 Count; 768 ACPI_STATUS Status; 769 ACPI_OBJECT_LIST Arg_list; 770 ACPI_OBJECT Arg; 771 ACPI_OBJECT Objects[3]; /* package plus 2 number objects */ 772 ACPI_BUFFER ReturnBuffer; 773 774 FUNCTION_TRACE_U32(__func__, state); 775 776 /* wait for the WAK_STS bit */ 777 Count = 0; 778 while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) { 779 AcpiOsSleepUsec(1000); 780 /* 781 * Some BIOSes don't set WAK_STS at all, 782 * give up waiting for wakeup if we time out. 783 */ 784 if (Count > 1000) { 785 break; /* giving up */ 786 } 787 Count++; 788 } 789 790 /* 791 * Evaluate the _WAK method 792 */ 793 MEMSET(&Arg_list, 0, sizeof(Arg_list)); 794 Arg_list.Count = 1; 795 Arg_list.Pointer = &Arg; 796 797 MEMSET(&Arg, 0, sizeof(Arg)); 798 Arg.Type = ACPI_TYPE_INTEGER; 799 Arg.Integer.Value = state; 800 801 /* Set up _WAK result code buffer */ 802 MEMSET(Objects, 0, sizeof(Objects)); 803 ReturnBuffer.Length = sizeof(Objects); 804 ReturnBuffer.Pointer = Objects; 805 806 AcpiEvaluateObject (NULL, "\\_WAK", &Arg_list, &ReturnBuffer); 807 808 Status = AE_OK; 809 /* Check result code for _WAK */ 810 if (Objects[0].Type != ACPI_TYPE_PACKAGE || 811 Objects[1].Type != ACPI_TYPE_INTEGER || 812 Objects[2].Type != ACPI_TYPE_INTEGER) { 813 /* 814 * In many BIOSes, _WAK doesn't return a result code. 815 * We don't need to worry about it too much :-). 816 */ 817 DEBUG_PRINT (ACPI_INFO, 818 ("acpi_wakeup: _WAK result code is corrupted, " 819 "but should be OK.\n")); 820 } else { 821 /* evaluate status code */ 822 switch (Objects[1].Integer.Value) { 823 case 0x00000001: 824 DEBUG_PRINT (ACPI_ERROR, 825 ("acpi_wakeup: Wake was signaled " 826 "but failed due to lack of power.\n")); 827 Status = AE_ERROR; 828 break; 829 830 case 0x00000002: 831 DEBUG_PRINT (ACPI_ERROR, 832 ("acpi_wakeup: Wake was signaled " 833 "but failed due to thermal condition.\n")); 834 Status = AE_ERROR; 835 break; 836 } 837 /* evaluate PSS code */ 838 if (Objects[2].Integer.Value == 0) { 839 DEBUG_PRINT (ACPI_ERROR, 840 ("acpi_wakeup: The targeted S-state " 841 "was not entered because of too much current " 842 "being drawn from the power supply.\n")); 843 Status = AE_ERROR; 844 } 845 } 846 847 return_ACPI_STATUS(Status); 848 } 849 850 /* 851 * Set the system sleep state 852 * 853 * Currently we only support S1 and S5 854 */ 855 ACPI_STATUS 856 acpi_SetSleepState(struct acpi_softc *sc, int state) 857 { 858 ACPI_STATUS status = AE_OK; 859 860 FUNCTION_TRACE_U32(__func__, state); 861 862 switch (state) { 863 case ACPI_STATE_S0: /* XXX only for testing */ 864 status = AcpiEnterSleepState((UINT8)state); 865 if (status != AE_OK) { 866 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", acpi_strerror(status)); 867 } 868 break; 869 870 case ACPI_STATE_S1: 871 /* 872 * Inform all devices that we are going to sleep. 873 */ 874 if (DEVICE_SUSPEND(root_bus) != 0) { 875 /* 876 * Re-wake the system. 877 * 878 * XXX note that a better two-pass approach with a 'veto' pass 879 * followed by a "real thing" pass would be better, but the 880 * current bus interface does not provide for this. 881 */ 882 DEVICE_RESUME(root_bus); 883 return_ACPI_STATUS(AE_ERROR); 884 } 885 sc->acpi_sstate = state; 886 status = AcpiEnterSleepState((UINT8)state); 887 if (status != AE_OK) { 888 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", acpi_strerror(status)); 889 break; 890 } 891 acpi_wakeup((UINT8)state); 892 DEVICE_RESUME(root_bus); 893 sc->acpi_sstate = ACPI_STATE_S0; 894 acpi_enable_fixed_events(sc); 895 break; 896 897 case ACPI_STATE_S3: 898 acpi_off_state = ACPI_STATE_S3; 899 /* FALLTHROUGH */ 900 case ACPI_STATE_S5: 901 /* 902 * Shut down cleanly and power off. This will call us back through the 903 * shutdown handlers. 904 */ 905 shutdown_nice(RB_POWEROFF); 906 break; 907 908 default: 909 status = AE_BAD_PARAMETER; 910 break; 911 } 912 return_ACPI_STATUS(status); 913 } 914 915 /* 916 * Enable/Disable ACPI 917 */ 918 ACPI_STATUS 919 acpi_Enable(struct acpi_softc *sc) 920 { 921 ACPI_STATUS status; 922 u_int32_t flags; 923 924 FUNCTION_TRACE(__func__); 925 926 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 927 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 928 if (!sc->acpi_enabled) { 929 status = AcpiEnableSubsystem(flags); 930 } else { 931 status = AE_OK; 932 } 933 if (status == AE_OK) 934 sc->acpi_enabled = 1; 935 return_ACPI_STATUS(status); 936 } 937 938 ACPI_STATUS 939 acpi_Disable(struct acpi_softc *sc) 940 { 941 ACPI_STATUS status; 942 943 FUNCTION_TRACE(__func__); 944 945 if (sc->acpi_enabled) { 946 status = AcpiDisable(); 947 } else { 948 status = AE_OK; 949 } 950 if (status == AE_OK) 951 sc->acpi_enabled = 0; 952 return_ACPI_STATUS(status); 953 } 954 955 /* 956 * Returns true if the device is actually present and should 957 * be attached to. This requires the present, enabled, UI-visible 958 * and diagnostics-passed bits to be set. 959 */ 960 BOOLEAN 961 acpi_DeviceIsPresent(device_t dev) 962 { 963 ACPI_HANDLE h; 964 ACPI_DEVICE_INFO devinfo; 965 ACPI_STATUS error; 966 967 if ((h = acpi_get_handle(dev)) == NULL) 968 return(FALSE); 969 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 970 return(FALSE); 971 if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) 972 return(TRUE); 973 return(FALSE); 974 } 975 976 /* 977 * Evaluate a path that should return an integer. 978 */ 979 ACPI_STATUS 980 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 981 { 982 ACPI_STATUS error; 983 ACPI_BUFFER buf; 984 ACPI_OBJECT param; 985 986 if (handle == NULL) 987 handle = ACPI_ROOT_OBJECT; 988 buf.Pointer = ¶m; 989 buf.Length = sizeof(param); 990 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 991 if (param.Type == ACPI_TYPE_INTEGER) { 992 *number = param.Integer.Value; 993 } else { 994 error = AE_TYPE; 995 } 996 } 997 return(error); 998 } 999 1000 /* 1001 * ACPI Event Handlers 1002 */ 1003 1004 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1005 1006 static void 1007 acpi_system_eventhandler_sleep(void *arg, int state) 1008 { 1009 FUNCTION_TRACE_U32(__func__, state); 1010 1011 if (state >= ACPI_STATE_S0 && state <= ACPI_STATE_S5) 1012 acpi_SetSleepState((struct acpi_softc *)arg, state); 1013 return_VOID; 1014 } 1015 1016 static void 1017 acpi_system_eventhandler_wakeup(void *arg, int state) 1018 { 1019 FUNCTION_TRACE_U32(__func__, state); 1020 1021 /* Well, what to do? :-) */ 1022 1023 return_VOID; 1024 } 1025 1026 /* 1027 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1028 */ 1029 UINT32 1030 acpi_eventhandler_power_button_for_sleep(void *context) 1031 { 1032 struct acpi_softc *sc = (struct acpi_softc *)context; 1033 1034 FUNCTION_TRACE(__func__); 1035 1036 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1037 1038 return_VALUE(INTERRUPT_HANDLED); 1039 } 1040 1041 UINT32 1042 acpi_eventhandler_power_button_for_wakeup(void *context) 1043 { 1044 struct acpi_softc *sc = (struct acpi_softc *)context; 1045 1046 FUNCTION_TRACE(__func__); 1047 1048 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1049 1050 return_VALUE(INTERRUPT_HANDLED); 1051 } 1052 1053 UINT32 1054 acpi_eventhandler_sleep_button_for_sleep(void *context) 1055 { 1056 struct acpi_softc *sc = (struct acpi_softc *)context; 1057 1058 FUNCTION_TRACE(__func__); 1059 1060 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1061 1062 return_VALUE(INTERRUPT_HANDLED); 1063 } 1064 1065 UINT32 1066 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1067 { 1068 struct acpi_softc *sc = (struct acpi_softc *)context; 1069 1070 FUNCTION_TRACE(__func__); 1071 1072 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1073 1074 return_VALUE(INTERRUPT_HANDLED); 1075 } 1076 1077 /* 1078 * XXX This is kinda ugly, and should not be here. 1079 */ 1080 struct acpi_staticbuf { 1081 ACPI_BUFFER buffer; 1082 char data[512]; 1083 }; 1084 1085 char * 1086 acpi_strerror(ACPI_STATUS excep) 1087 { 1088 static struct acpi_staticbuf buf; 1089 1090 buf.buffer.Length = 512; 1091 buf.buffer.Pointer = &buf.data[0]; 1092 1093 if (AcpiFormatException(excep, &buf.buffer) == AE_OK) 1094 return(buf.buffer.Pointer); 1095 return("(error formatting exception)"); 1096 } 1097 1098 char * 1099 acpi_name(ACPI_HANDLE handle) 1100 { 1101 static struct acpi_staticbuf buf; 1102 1103 buf.buffer.Length = 512; 1104 buf.buffer.Pointer = &buf.data[0]; 1105 1106 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 1107 return(buf.buffer.Pointer); 1108 return("(unknown path)"); 1109 } 1110 1111 /* 1112 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1113 * parts of the namespace. 1114 */ 1115 int 1116 acpi_avoid(ACPI_HANDLE handle) 1117 { 1118 char *cp, *np; 1119 int len; 1120 1121 np = acpi_name(handle); 1122 if (*np == '\\') 1123 np++; 1124 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1125 return(0); 1126 1127 /* scan the avoid list checking for a match */ 1128 for (;;) { 1129 while ((*cp != 0) && isspace(*cp)) 1130 cp++; 1131 if (*cp == 0) 1132 break; 1133 len = 0; 1134 while ((cp[len] != 0) && !isspace(cp[len])) 1135 len++; 1136 if (!strncmp(cp, np, len)) { 1137 DEBUG_PRINT(TRACE_OBJECTS, ("avoiding '%s'\n", np)); 1138 return(1); 1139 } 1140 cp += len; 1141 } 1142 return(0); 1143 } 1144 1145 /* 1146 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1147 */ 1148 int 1149 acpi_disabled(char *subsys) 1150 { 1151 char *cp; 1152 int len; 1153 1154 if ((cp = getenv("debug.acpi.disable")) == NULL) 1155 return(0); 1156 if (!strcmp(cp, "all")) 1157 return(1); 1158 1159 /* scan the disable list checking for a match */ 1160 for (;;) { 1161 while ((*cp != 0) && isspace(*cp)) 1162 cp++; 1163 if (*cp == 0) 1164 break; 1165 len = 0; 1166 while ((cp[len] != 0) && !isspace(cp[len])) 1167 len++; 1168 if (!strncmp(cp, subsys, len)) { 1169 DEBUG_PRINT(TRACE_OBJECTS, ("disabled '%s'\n", subsys)); 1170 return(1); 1171 } 1172 cp += len; 1173 } 1174 return(0); 1175 } 1176 1177 /* 1178 * Control interface. 1179 * 1180 * We multiplex ioctls for all participating ACPI devices here. Individual 1181 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1182 * interface to make their handlers visible. 1183 */ 1184 struct acpi_ioctl_hook 1185 { 1186 TAILQ_ENTRY(acpi_ioctl_hook) link; 1187 u_long cmd; 1188 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1189 void *arg; 1190 }; 1191 1192 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1193 static int acpi_ioctl_hooks_initted; 1194 1195 /* 1196 * Register an ioctl handler. 1197 */ 1198 int 1199 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1200 { 1201 struct acpi_ioctl_hook *hp; 1202 1203 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1204 return(ENOMEM); 1205 hp->cmd = cmd; 1206 hp->fn = fn; 1207 hp->arg = arg; 1208 if (acpi_ioctl_hooks_initted == 0) { 1209 TAILQ_INIT(&acpi_ioctl_hooks); 1210 acpi_ioctl_hooks_initted = 1; 1211 } 1212 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1213 return(0); 1214 } 1215 1216 /* 1217 * Deregister an ioctl handler. 1218 */ 1219 void 1220 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1221 { 1222 struct acpi_ioctl_hook *hp; 1223 1224 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1225 if ((hp->cmd == cmd) && (hp->fn == fn)) 1226 break; 1227 1228 if (hp != NULL) { 1229 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1230 free(hp, M_ACPIDEV); 1231 } 1232 } 1233 1234 static int 1235 acpiopen(dev_t dev, int flag, int fmt, struct proc *p) 1236 { 1237 return(0); 1238 } 1239 1240 static int 1241 acpiclose(dev_t dev, int flag, int fmt, struct proc *p) 1242 { 1243 return(0); 1244 } 1245 1246 static int 1247 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1248 { 1249 struct acpi_softc *sc; 1250 struct acpi_ioctl_hook *hp; 1251 int error, xerror, state; 1252 1253 error = state = 0; 1254 sc = dev->si_drv1; 1255 1256 /* 1257 * Scan the list of registered ioctls, looking for handlers. 1258 */ 1259 if (acpi_ioctl_hooks_initted) { 1260 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1261 if (hp->cmd == cmd) { 1262 xerror = hp->fn(cmd, addr, hp->arg); 1263 if (xerror != 0) 1264 error = xerror; 1265 goto out; 1266 } 1267 } 1268 } 1269 1270 /* 1271 * Core system ioctls. 1272 */ 1273 switch (cmd) { 1274 case ACPIIO_ENABLE: 1275 if (ACPI_FAILURE(acpi_Enable(sc))) 1276 error = ENXIO; 1277 break; 1278 1279 case ACPIIO_DISABLE: 1280 if (ACPI_FAILURE(acpi_Disable(sc))) 1281 error = ENXIO; 1282 break; 1283 1284 case ACPIIO_SETSLPSTATE: 1285 if (!sc->acpi_enabled) { 1286 error = ENXIO; 1287 break; 1288 } 1289 state = *(int *)addr; 1290 if (state >= ACPI_STATE_S0 && state <= ACPI_STATE_S5) { 1291 acpi_SetSleepState(sc, state); 1292 } else { 1293 error = EINVAL; 1294 } 1295 break; 1296 1297 default: 1298 if (error == 0) 1299 error = EINVAL; 1300 break; 1301 } 1302 1303 out: 1304 return(error); 1305 } 1306 1307 static int 1308 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1309 { 1310 char sleep_state[10]; 1311 int error; 1312 u_int new_state, old_state; 1313 1314 old_state = *(u_int *)oidp->oid_arg1; 1315 if (old_state > ACPI_STATE_S5) 1316 strcpy(sleep_state, "unknown"); 1317 else 1318 strncpy(sleep_state, sleep_state_names[old_state], 1319 sizeof(sleep_state_names[old_state])); 1320 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1321 if (error == 0 && req->newptr != NULL) { 1322 for (new_state = ACPI_STATE_S0; new_state <= ACPI_STATE_S5; new_state++) 1323 if (strncmp(sleep_state, sleep_state_names[new_state], 1324 sizeof(sleep_state)) == 0) 1325 break; 1326 if (new_state != old_state && new_state <= ACPI_STATE_S5) 1327 *(u_int *)oidp->oid_arg1 = new_state; 1328 else 1329 error = EINVAL; 1330 } 1331 return(error); 1332 } 1333 1334 #ifdef ACPI_DEBUG 1335 /* 1336 * Support for parsing debug options from the kernel environment. 1337 * 1338 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1339 * by specifying the names of the bits in the debug.acpi.layer and 1340 * debug.acpi.level environment variables. Bits may be unset by 1341 * prefixing the bit name with !. 1342 */ 1343 struct debugtag 1344 { 1345 char *name; 1346 UINT32 value; 1347 }; 1348 1349 static struct debugtag dbg_layer[] = { 1350 {"GLOBAL", 0x00000001}, 1351 {"COMMON", 0x00000002}, 1352 {"PARSER", 0x00000004}, 1353 {"DISPATCHER", 0x00000008}, 1354 {"INTERPRETER", 0x00000010}, 1355 {"NAMESPACE", 0x00000020}, 1356 {"RESOURCE_MANAGER", 0x00000040}, 1357 {"TABLE_MANAGER", 0x00000080}, 1358 {"EVENT_HANDLING", 0x00000100}, 1359 {"HARDWARE", 0x00000200}, 1360 {"MISCELLANEOUS", 0x00000400}, 1361 {"OS_DEPENDENT", 0x00000800}, 1362 {"BUS_MANAGER", 0x00001000}, 1363 {"PROCESSOR_CONTROL", 0x00002000}, 1364 {"SYSTEM_CONTROL", 0x00004000}, 1365 {"THERMAL_CONTROL", 0x00008000}, 1366 {"POWER_CONTROL", 0x00010000}, 1367 {"EMBEDDED_CONTROLLER", 0x00020000}, 1368 {"BATTERY", 0x00040000}, 1369 {"DEBUGGER", 0x00100000}, 1370 {"ALL_COMPONENTS", 0x001FFFFF}, 1371 {NULL, 0} 1372 }; 1373 1374 static struct debugtag dbg_level[] = { 1375 {"ACPI_OK", 0x00000001}, 1376 {"ACPI_INFO", 0x00000002}, 1377 {"ACPI_WARN", 0x00000004}, 1378 {"ACPI_ERROR", 0x00000008}, 1379 {"ACPI_FATAL", 0x00000010}, 1380 {"ACPI_DEBUG_OBJECT", 0x00000020}, 1381 {"ACPI_ALL", 0x0000003F}, 1382 {"TRACE_PARSE", 0x00000100}, 1383 {"TRACE_DISPATCH", 0x00000200}, 1384 {"TRACE_LOAD", 0x00000400}, 1385 {"TRACE_EXEC", 0x00000800}, 1386 {"TRACE_NAMES", 0x00001000}, 1387 {"TRACE_OPREGION", 0x00002000}, 1388 {"TRACE_BFIELD", 0x00004000}, 1389 {"TRACE_TRASH", 0x00008000}, 1390 {"TRACE_TABLES", 0x00010000}, 1391 {"TRACE_FUNCTIONS", 0x00020000}, 1392 {"TRACE_VALUES", 0x00040000}, 1393 {"TRACE_OBJECTS", 0x00080000}, 1394 {"TRACE_ALLOCATIONS", 0x00100000}, 1395 {"TRACE_RESOURCES", 0x00200000}, 1396 {"TRACE_IO", 0x00400000}, 1397 {"TRACE_INTERRUPTS", 0x00800000}, 1398 {"TRACE_USER_REQUESTS", 0x01000000}, 1399 {"TRACE_PACKAGE", 0x02000000}, 1400 {"TRACE_MUTEX", 0x04000000}, 1401 {"TRACE_ALL", 0x0FFFFF00}, 1402 {"VERBOSE_AML_DISASSEMBLE", 0x10000000}, 1403 {"VERBOSE_INFO", 0x20000000}, 1404 {"VERBOSE_TABLES", 0x40000000}, 1405 {"VERBOSE_EVENTS", 0x80000000}, 1406 {"VERBOSE_ALL", 0xF0000000}, 1407 {NULL, 0} 1408 }; 1409 1410 static void 1411 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1412 { 1413 char *ep; 1414 int i, l; 1415 int set; 1416 1417 while (*cp) { 1418 if (isspace(*cp)) { 1419 cp++; 1420 continue; 1421 } 1422 ep = cp; 1423 while (*ep && !isspace(*ep)) 1424 ep++; 1425 if (*cp == '!') { 1426 set = 0; 1427 cp++; 1428 if (cp == ep) 1429 continue; 1430 } else { 1431 set = 1; 1432 } 1433 l = ep - cp; 1434 for (i = 0; tag[i].name != NULL; i++) { 1435 if (!strncmp(cp, tag[i].name, l)) { 1436 if (set) { 1437 *flag |= tag[i].value; 1438 } else { 1439 *flag &= ~tag[i].value; 1440 } 1441 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1442 } 1443 } 1444 cp = ep; 1445 } 1446 } 1447 1448 static void 1449 acpi_set_debugging(void *junk) 1450 { 1451 char *cp; 1452 1453 AcpiDbgLayer = 0; 1454 AcpiDbgLevel = 0; 1455 if ((cp = getenv("debug.acpi.layer")) != NULL) 1456 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1457 if ((cp = getenv("debug.acpi.level")) != NULL) 1458 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1459 1460 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1461 } 1462 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 1463 #endif 1464