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 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 static void acpi_identify(driver_t *driver, device_t parent); 92 static int acpi_probe(device_t dev); 93 static int acpi_attach(device_t dev); 94 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 95 static int acpi_print_resources(struct resource_list *rl, const char *name, int type, 96 const char *format); 97 static int acpi_print_child(device_t bus, device_t child); 98 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 99 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 100 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 101 u_long count); 102 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 103 u_long *countp); 104 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 105 u_long start, u_long end, u_long count, u_int flags); 106 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 107 108 static void acpi_probe_children(device_t bus); 109 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 110 111 static void acpi_shutdown_pre_sync(void *arg, int howto); 112 static void acpi_shutdown_final(void *arg, int howto); 113 114 static void acpi_enable_fixed_events(struct acpi_softc *sc); 115 116 #ifdef ACPI_DEBUG 117 static void acpi_set_debugging(void); 118 #endif 119 120 static void acpi_system_eventhandler_sleep(void *arg, int state); 121 static void acpi_system_eventhandler_wakeup(void *arg, int state); 122 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 123 124 static device_method_t acpi_methods[] = { 125 /* Device interface */ 126 DEVMETHOD(device_identify, acpi_identify), 127 DEVMETHOD(device_probe, acpi_probe), 128 DEVMETHOD(device_attach, acpi_attach), 129 DEVMETHOD(device_shutdown, bus_generic_shutdown), 130 DEVMETHOD(device_suspend, bus_generic_suspend), 131 DEVMETHOD(device_resume, bus_generic_resume), 132 133 /* Bus interface */ 134 DEVMETHOD(bus_add_child, acpi_add_child), 135 DEVMETHOD(bus_print_child, acpi_print_child), 136 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 137 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 138 DEVMETHOD(bus_set_resource, acpi_set_resource), 139 DEVMETHOD(bus_get_resource, acpi_get_resource), 140 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 141 DEVMETHOD(bus_release_resource, acpi_release_resource), 142 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 143 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 144 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 145 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 146 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 147 148 {0, 0} 149 }; 150 151 static driver_t acpi_driver = { 152 "acpi", 153 acpi_methods, 154 sizeof(struct acpi_softc), 155 }; 156 157 devclass_t acpi_devclass; 158 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, 0, 0); 159 160 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 161 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 162 163 /* 164 * Detect ACPI, perform early initialisation 165 */ 166 static void 167 acpi_identify(driver_t *driver, device_t parent) 168 { 169 device_t child; 170 ACPI_PHYSICAL_ADDRESS rsdp; 171 int error; 172 #ifdef ENABLE_DEBUGGER 173 char *debugpoint = getenv("debug.acpi.debugger"); 174 #endif 175 176 FUNCTION_TRACE(__FUNCTION__); 177 178 if(!cold){ 179 printf("Don't load this driver from userland!!\n"); 180 return ; 181 } 182 183 /* 184 * Make sure we're not being doubly invoked. 185 */ 186 if (device_find_child(parent, "acpi", 0) != NULL) 187 return_VOID; 188 189 #ifdef ACPI_DEBUG 190 acpi_set_debugging(); 191 #endif 192 193 /* 194 * Start up ACPICA 195 */ 196 #ifdef ENABLE_DEBUGGER 197 if (debugpoint && !strcmp(debugpoint, "init")) 198 acpi_EnterDebugger(); 199 #endif 200 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 201 printf("ACPI: initialisation failed: %s\n", acpi_strerror(error)); 202 return_VOID; 203 } 204 #ifdef ENABLE_DEBUGGER 205 if (debugpoint && !strcmp(debugpoint, "tables")) 206 acpi_EnterDebugger(); 207 #endif 208 if (((error = AcpiFindRootPointer(&rsdp)) != AE_OK) || 209 ((error = AcpiLoadTables(rsdp)) != AE_OK)) { 210 printf("ACPI: table load failed: %s\n", acpi_strerror(error)); 211 return_VOID; 212 } 213 214 /* 215 * Attach the actual ACPI device. 216 */ 217 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 218 device_printf(parent, "ACPI: could not attach\n"); 219 return_VOID; 220 } 221 } 222 223 /* 224 * Fetch some descriptive data from ACPI to put in our attach message 225 */ 226 static int 227 acpi_probe(device_t dev) 228 { 229 ACPI_TABLE_HEADER th; 230 char buf[20]; 231 int error; 232 233 FUNCTION_TRACE(__FUNCTION__); 234 235 if ((error = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) { 236 device_printf(dev, "couldn't get XSDT header: %s\n", acpi_strerror(error)); 237 return_VALUE(ENXIO); 238 } 239 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 240 device_set_desc_copy(dev, buf); 241 242 return_VALUE(0); 243 } 244 245 static int 246 acpi_attach(device_t dev) 247 { 248 struct acpi_softc *sc; 249 int error; 250 #ifdef ENABLE_DEBUGGER 251 char *debugpoint = getenv("debug.acpi.debugger"); 252 #endif 253 254 FUNCTION_TRACE(__FUNCTION__); 255 256 sc = device_get_softc(dev); 257 bzero(sc, sizeof(*sc)); 258 sc->acpi_dev = dev; 259 260 #ifdef ENABLE_DEBUGGER 261 if (debugpoint && !strcmp(debugpoint, "spaces")) 262 acpi_EnterDebugger(); 263 #endif 264 265 /* 266 * Install the default address space handlers. 267 */ 268 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 269 ADDRESS_SPACE_SYSTEM_MEMORY, 270 ACPI_DEFAULT_HANDLER, 271 NULL, NULL)) != AE_OK) { 272 device_printf(dev, "could not initialise SystemMemory handler: %s\n", acpi_strerror(error)); 273 return_VALUE(ENXIO); 274 } 275 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 276 ADDRESS_SPACE_SYSTEM_IO, 277 ACPI_DEFAULT_HANDLER, 278 NULL, NULL)) != AE_OK) { 279 device_printf(dev, "could not initialise SystemIO handler: %s\n", acpi_strerror(error)); 280 return_VALUE(ENXIO); 281 } 282 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 283 ADDRESS_SPACE_PCI_CONFIG, 284 ACPI_DEFAULT_HANDLER, 285 NULL, NULL)) != AE_OK) { 286 device_printf(dev, "could not initialise PciConfig handler: %s\n", acpi_strerror(error)); 287 return_VALUE(ENXIO); 288 } 289 290 /* 291 * Bring ACPI fully online. 292 * 293 * Note that we request that device _STA and _INI methods not be run (ACPI_NO_DEVICE_INIT) 294 * and the final object initialisation pass be skipped (ACPI_NO_OBJECT_INIT). 295 * 296 * XXX We need to arrange for the object init pass after we have attached all our 297 * child devices. 298 */ 299 #ifdef ENABLE_DEBUGGER 300 if (debugpoint && !strcmp(debugpoint, "enable")) 301 acpi_EnterDebugger(); 302 #endif 303 if ((error = AcpiEnableSubsystem(ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT)) != AE_OK) { 304 device_printf(dev, "could not enable ACPI: %s\n", acpi_strerror(error)); 305 return_VALUE(ENXIO); 306 } 307 308 /* 309 * Setup our sysctl tree. 310 * 311 * XXX: This doesn't check to make sure that none of these fail. 312 */ 313 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 314 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 315 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 316 device_get_name(dev), CTLFLAG_RD, 0, ""); 317 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 318 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 319 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 320 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 321 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 322 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 323 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 324 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 325 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 326 327 /* 328 * Dispatch the default sleep state to devices. 329 * TBD: should be configured from userland policy manager. 330 */ 331 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 332 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 333 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 334 335 acpi_enable_fixed_events(sc); 336 337 /* 338 * Scan the namespace and attach/initialise children. 339 */ 340 #ifdef ENABLE_DEBUGGER 341 if (debugpoint && !strcmp(debugpoint, "probe")) 342 acpi_EnterDebugger(); 343 #endif 344 if (!acpi_disabled("bus")) 345 acpi_probe_children(dev); 346 347 /* 348 * Register our shutdown handlers 349 */ 350 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 351 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 352 353 /* 354 * Register our acpi event handlers. 355 * XXX should be configurable eg. via userland policy manager. 356 */ 357 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 358 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 359 360 /* 361 * Flag our initial states. 362 */ 363 sc->acpi_enabled = 1; 364 sc->acpi_sstate = ACPI_STATE_S0; 365 366 /* 367 * Create the control device 368 */ 369 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 370 sc->acpi_dev_t->si_drv1 = sc; 371 372 #ifdef ENABLE_DEBUGGER 373 if (debugpoint && !strcmp(debugpoint, "running")) 374 acpi_EnterDebugger(); 375 #endif 376 return_VALUE(0); 377 } 378 379 /* 380 * Handle a new device being added 381 */ 382 static device_t 383 acpi_add_child(device_t bus, int order, const char *name, int unit) 384 { 385 struct acpi_device *ad; 386 device_t child; 387 388 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 389 return(NULL); 390 bzero(ad, sizeof(*ad)); 391 392 resource_list_init(&ad->ad_rl); 393 394 child = device_add_child_ordered(bus, order, name, unit); 395 if (child != NULL) 396 device_set_ivars(child, ad); 397 return(child); 398 } 399 400 /* 401 * Print child device resource usage 402 */ 403 static int 404 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 405 { 406 struct resource_list_entry *rle; 407 int printed, retval; 408 409 printed = 0; 410 retval = 0; 411 412 if (!SLIST_FIRST(rl)) 413 return(0); 414 415 /* Yes, this is kinda cheating */ 416 SLIST_FOREACH(rle, rl, link) { 417 if (rle->type == type) { 418 if (printed == 0) 419 retval += printf(" %s ", name); 420 else if (printed > 0) 421 retval += printf(","); 422 printed++; 423 retval += printf(format, rle->start); 424 if (rle->count > 1) { 425 retval += printf("-"); 426 retval += printf(format, rle->start + 427 rle->count - 1); 428 } 429 } 430 } 431 return(retval); 432 } 433 434 static int 435 acpi_print_child(device_t bus, device_t child) 436 { 437 struct acpi_device *adev = device_get_ivars(child); 438 struct resource_list *rl = &adev->ad_rl; 439 int retval = 0; 440 441 retval += bus_print_child_header(bus, child); 442 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 443 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 444 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 445 retval += bus_print_child_footer(bus, child); 446 447 return(retval); 448 } 449 450 451 /* 452 * Handle per-device ivars 453 */ 454 static int 455 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 456 { 457 struct acpi_device *ad; 458 459 if ((ad = device_get_ivars(child)) == NULL) { 460 printf("device has no ivars\n"); 461 return(ENOENT); 462 } 463 464 switch(index) { 465 /* ACPI ivars */ 466 case ACPI_IVAR_HANDLE: 467 *(ACPI_HANDLE *)result = ad->ad_handle; 468 break; 469 case ACPI_IVAR_MAGIC: 470 *(int *)result = ad->ad_magic; 471 break; 472 case ACPI_IVAR_PRIVATE: 473 *(void **)result = ad->ad_private; 474 break; 475 476 default: 477 panic("bad ivar read request (%d)\n", index); 478 return(ENOENT); 479 } 480 return(0); 481 } 482 483 static int 484 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 485 { 486 struct acpi_device *ad; 487 488 if ((ad = device_get_ivars(child)) == NULL) { 489 printf("device has no ivars\n"); 490 return(ENOENT); 491 } 492 493 switch(index) { 494 /* ACPI ivars */ 495 case ACPI_IVAR_HANDLE: 496 ad->ad_handle = (ACPI_HANDLE)value; 497 break; 498 case ACPI_IVAR_MAGIC: 499 ad->ad_magic = (int )value; 500 break; 501 case ACPI_IVAR_PRIVATE: 502 ad->ad_private = (void *)value; 503 break; 504 505 default: 506 panic("bad ivar write request (%d)\n", index); 507 return(ENOENT); 508 } 509 return(0); 510 } 511 512 /* 513 * Handle child resource allocation/removal 514 */ 515 static int 516 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 517 { 518 struct acpi_device *ad = device_get_ivars(child); 519 struct resource_list *rl = &ad->ad_rl; 520 521 resource_list_add(rl, type, rid, start, start + count -1, count); 522 523 return(0); 524 } 525 526 static int 527 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 528 { 529 struct acpi_device *ad = device_get_ivars(child); 530 struct resource_list *rl = &ad->ad_rl; 531 struct resource_list_entry *rle; 532 533 rle = resource_list_find(rl, type, rid); 534 if (!rle) 535 return(ENOENT); 536 537 if (startp) 538 *startp = rle->start; 539 if (countp) 540 *countp = rle->count; 541 542 return(0); 543 } 544 545 static struct resource * 546 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 547 u_long start, u_long end, u_long count, u_int flags) 548 { 549 struct acpi_device *ad = device_get_ivars(child); 550 struct resource_list *rl = &ad->ad_rl; 551 552 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 553 } 554 555 static int 556 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 557 { 558 struct acpi_device *ad = device_get_ivars(child); 559 struct resource_list *rl = &ad->ad_rl; 560 561 return(resource_list_release(rl, bus, child, type, rid, r)); 562 } 563 564 /* 565 * Scan relevant portions of the ACPI namespace and attach child devices. 566 * 567 * Note that we only expect to find devices in the \_TZ_, \_SI_ and \_SB_ scopes, 568 * and \_TZ_ becomes obsolete in the ACPI 2.0 spec. 569 */ 570 static void 571 acpi_probe_children(device_t bus) 572 { 573 ACPI_HANDLE parent; 574 static char *scopes[] = {"\\_TZ_", "\\_SI", "\\_SB_", NULL}; 575 int i; 576 577 FUNCTION_TRACE(__FUNCTION__); 578 579 /* 580 * Create any static children by calling device identify methods. 581 */ 582 DEBUG_PRINT(TRACE_OBJECTS, ("device identify routines\n")); 583 bus_generic_probe(bus); 584 585 /* 586 * Scan the namespace and insert placeholders for all the devices that 587 * we find. 588 * 589 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 590 * we want to create nodes for all devices, not just those that are currently 591 * present. (This assumes that we don't want to create/remove devices as they 592 * appear, which might be smarter.) 593 */ 594 DEBUG_PRINT(TRACE_OBJECTS, ("namespace scan\n")); 595 for (i = 0; scopes[i] != NULL; i++) 596 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 597 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 598 599 /* 600 * Scan all of the child devices we have created and let them probe/attach. 601 */ 602 DEBUG_PRINT(TRACE_OBJECTS, ("first bus_generic_attach\n")); 603 bus_generic_attach(bus); 604 605 /* 606 * Some of these children may have attached others as part of their attach 607 * process (eg. the root PCI bus driver), so rescan. 608 */ 609 DEBUG_PRINT(TRACE_OBJECTS, ("second bus_generic_attach\n")); 610 bus_generic_attach(bus); 611 612 return_VOID; 613 } 614 615 /* 616 * Evaluate a child device and determine whether we might attach a device to 617 * it. 618 */ 619 static ACPI_STATUS 620 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 621 { 622 ACPI_OBJECT_TYPE type; 623 device_t child, bus = (device_t)context; 624 625 FUNCTION_TRACE(__FUNCTION__); 626 627 /* 628 * Skip this device if we think we'll have trouble with it. 629 */ 630 if (acpi_avoid(handle)) 631 return_ACPI_STATUS(AE_OK); 632 633 if (AcpiGetType(handle, &type) == AE_OK) { 634 switch(type) { 635 case ACPI_TYPE_DEVICE: 636 case ACPI_TYPE_PROCESSOR: 637 case ACPI_TYPE_THERMAL: 638 case ACPI_TYPE_POWER: 639 if (acpi_disabled("children")) 640 break; 641 /* 642 * Create a placeholder device for this node. Sort the placeholder 643 * so that the probe/attach passes will run breadth-first. 644 */ 645 DEBUG_PRINT(TRACE_OBJECTS, ("scanning '%s'\n", acpi_name(handle))) 646 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 647 acpi_set_handle(child, handle); 648 DEBUG_EXEC(device_probe_and_attach(child)); 649 break; 650 } 651 } 652 return_ACPI_STATUS(AE_OK); 653 } 654 655 static void 656 acpi_shutdown_pre_sync(void *arg, int howto) 657 { 658 /* 659 * Disable all ACPI events before soft off, otherwise the system 660 * will be turned on again on some laptops. 661 * 662 * XXX this should probably be restricted to masking some events just 663 * before powering down, since we may still need ACPI during the 664 * shutdown process. 665 */ 666 acpi_Disable((struct acpi_softc *)arg); 667 } 668 669 static void 670 acpi_shutdown_final(void *arg, int howto) 671 { 672 ACPI_STATUS status; 673 674 if (howto & RB_POWEROFF) { 675 printf("Power system off using ACPI...\n"); 676 if ((status = AcpiEnterSleepState(ACPI_STATE_S5)) != AE_OK) { 677 printf("ACPI power-off failed - %s\n", acpi_strerror(status)); 678 } else { 679 DELAY(1000000); 680 printf("ACPI power-off failed - timeout\n"); 681 } 682 } 683 } 684 685 static void 686 acpi_enable_fixed_events(struct acpi_softc *sc) 687 { 688 static int first_time = 1; 689 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 690 691 /* Enable and clear fixed events and install handlers. */ 692 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 693 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 694 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 695 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 696 acpi_eventhandler_power_button_for_sleep, sc); 697 if (first_time) { 698 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 699 } 700 } 701 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 702 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 703 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 704 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 705 acpi_eventhandler_sleep_button_for_sleep, sc); 706 if (first_time) { 707 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 708 } 709 } 710 711 first_time = 0; 712 } 713 714 /* 715 * Match a HID string against a device 716 */ 717 BOOLEAN 718 acpi_MatchHid(device_t dev, char *hid) 719 { 720 ACPI_HANDLE h; 721 ACPI_DEVICE_INFO devinfo; 722 ACPI_STATUS error; 723 724 if (hid == NULL) 725 return(FALSE); 726 if ((h = acpi_get_handle(dev)) == NULL) 727 return(FALSE); 728 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 729 return(FALSE); 730 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 731 return(TRUE); 732 return(FALSE); 733 } 734 735 /* 736 * Perform the tedious double-get procedure required for fetching something into 737 * an ACPI_BUFFER that has not been initialised. 738 */ 739 ACPI_STATUS 740 acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 741 { 742 ACPI_STATUS status; 743 744 buf->Length = 0; 745 buf->Pointer = NULL; 746 747 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 748 return(status); 749 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 750 return(AE_NO_MEMORY); 751 return(func(handle, buf)); 752 } 753 754 /* 755 * Allocate a buffer with a preset data size. 756 */ 757 ACPI_BUFFER * 758 acpi_AllocBuffer(int size) 759 { 760 ACPI_BUFFER *buf; 761 762 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 763 return(NULL); 764 buf->Length = size; 765 buf->Pointer = (void *)(buf + 1); 766 return(buf); 767 } 768 769 static ACPI_STATUS __inline 770 acpi_wakeup(UINT8 state) 771 { 772 UINT16 Count; 773 ACPI_STATUS Status; 774 ACPI_OBJECT_LIST Arg_list; 775 ACPI_OBJECT Arg; 776 ACPI_OBJECT Objects[3]; /* package plus 2 number objects */ 777 ACPI_BUFFER ReturnBuffer; 778 779 FUNCTION_TRACE_U32(__FUNCTION__, state); 780 781 /* wait for the WAK_STS bit */ 782 Count = 0; 783 while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) { 784 AcpiOsSleepUsec(1000); 785 /* 786 * Some BIOSes don't set WAK_STS at all, 787 * give up waiting for wakeup if we time out. 788 */ 789 if (Count > 1000) { 790 break; /* giving up */ 791 } 792 Count++; 793 } 794 795 /* 796 * Evaluate the _WAK method 797 */ 798 MEMSET(&Arg_list, 0, sizeof(Arg_list)); 799 Arg_list.Count = 1; 800 Arg_list.Pointer = &Arg; 801 802 MEMSET(&Arg, 0, sizeof(Arg)); 803 Arg.Type = ACPI_TYPE_INTEGER; 804 Arg.Integer.Value = state; 805 806 /* Set up _WAK result code buffer */ 807 MEMSET(Objects, 0, sizeof(Objects)); 808 ReturnBuffer.Length = sizeof(Objects); 809 ReturnBuffer.Pointer = Objects; 810 811 AcpiEvaluateObject (NULL, "\\_WAK", &Arg_list, &ReturnBuffer); 812 813 Status = AE_OK; 814 /* Check result code for _WAK */ 815 if (Objects[0].Type != ACPI_TYPE_PACKAGE || 816 Objects[1].Type != ACPI_TYPE_INTEGER || 817 Objects[2].Type != ACPI_TYPE_INTEGER) { 818 /* 819 * In many BIOSes, _WAK doesn't return a result code. 820 * We don't need to worry about it too much :-). 821 */ 822 DEBUG_PRINT (ACPI_INFO, 823 ("acpi_wakeup: _WAK result code is corrupted, " 824 "but should be OK.\n")); 825 } else { 826 /* evaluate status code */ 827 switch (Objects[1].Integer.Value) { 828 case 0x00000001: 829 DEBUG_PRINT (ACPI_ERROR, 830 ("acpi_wakeup: Wake was signaled " 831 "but failed due to lack of power.\n")); 832 Status = AE_ERROR; 833 break; 834 835 case 0x00000002: 836 DEBUG_PRINT (ACPI_ERROR, 837 ("acpi_wakeup: Wake was signaled " 838 "but failed due to thermal condition.\n")); 839 Status = AE_ERROR; 840 break; 841 } 842 /* evaluate PSS code */ 843 if (Objects[2].Integer.Value == 0) { 844 DEBUG_PRINT (ACPI_ERROR, 845 ("acpi_wakeup: The targeted S-state " 846 "was not entered because of too much current " 847 "being drawn from the power supply.\n")); 848 Status = AE_ERROR; 849 } 850 } 851 852 return_ACPI_STATUS(Status); 853 } 854 855 /* 856 * Set the system sleep state 857 * 858 * Currently we only support S1 and S5 859 */ 860 ACPI_STATUS 861 acpi_SetSleepState(struct acpi_softc *sc, int state) 862 { 863 ACPI_STATUS status = AE_OK; 864 865 FUNCTION_TRACE_U32(__FUNCTION__, state); 866 867 switch (state) { 868 case ACPI_STATE_S0: /* XXX only for testing */ 869 status = AcpiEnterSleepState((UINT8)state); 870 if (status != AE_OK) { 871 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", acpi_strerror(status)); 872 } 873 break; 874 875 case ACPI_STATE_S1: 876 /* 877 * Inform all devices that we are going to sleep. 878 */ 879 if (DEVICE_SUSPEND(root_bus) != 0) { 880 /* 881 * Re-wake the system. 882 * 883 * XXX note that a better two-pass approach with a 'veto' pass 884 * followed by a "real thing" pass would be better, but the 885 * current bus interface does not provide for this. 886 */ 887 DEVICE_RESUME(root_bus); 888 return_ACPI_STATUS(AE_ERROR); 889 } 890 sc->acpi_sstate = state; 891 status = AcpiEnterSleepState((UINT8)state); 892 if (status != AE_OK) { 893 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", acpi_strerror(status)); 894 break; 895 } 896 acpi_wakeup((UINT8)state); 897 DEVICE_RESUME(root_bus); 898 sc->acpi_sstate = ACPI_STATE_S0; 899 acpi_enable_fixed_events(sc); 900 break; 901 902 case ACPI_STATE_S5: 903 /* 904 * Shut down cleanly and power off. This will call us back through the 905 * shutdown handlers. 906 */ 907 shutdown_nice(RB_POWEROFF); 908 break; 909 910 default: 911 status = AE_BAD_PARAMETER; 912 break; 913 } 914 return_ACPI_STATUS(status); 915 } 916 917 /* 918 * Enable/Disable ACPI 919 */ 920 ACPI_STATUS 921 acpi_Enable(struct acpi_softc *sc) 922 { 923 ACPI_STATUS status; 924 u_int32_t flags; 925 926 FUNCTION_TRACE(__FUNCTION__); 927 928 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 929 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 930 if (!sc->acpi_enabled) { 931 status = AcpiEnableSubsystem(flags); 932 } else { 933 status = AE_OK; 934 } 935 if (status == AE_OK) 936 sc->acpi_enabled = 1; 937 return_ACPI_STATUS(status); 938 } 939 940 ACPI_STATUS 941 acpi_Disable(struct acpi_softc *sc) 942 { 943 ACPI_STATUS status; 944 945 FUNCTION_TRACE(__FUNCTION__); 946 947 if (sc->acpi_enabled) { 948 status = AcpiDisable(); 949 } else { 950 status = AE_OK; 951 } 952 if (status == AE_OK) 953 sc->acpi_enabled = 0; 954 return_ACPI_STATUS(status); 955 } 956 957 /* 958 * Returns true if the device is actually present and should 959 * be attached to. This requires the present, enabled, UI-visible 960 * and diagnostics-passed bits to be set. 961 */ 962 BOOLEAN 963 acpi_DeviceIsPresent(device_t dev) 964 { 965 ACPI_HANDLE h; 966 ACPI_DEVICE_INFO devinfo; 967 ACPI_STATUS error; 968 969 if ((h = acpi_get_handle(dev)) == NULL) 970 return(FALSE); 971 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 972 return(FALSE); 973 if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) 974 return(TRUE); 975 return(FALSE); 976 } 977 978 /* 979 * Evaluate a path that should return an integer. 980 */ 981 ACPI_STATUS 982 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 983 { 984 ACPI_STATUS error; 985 ACPI_BUFFER buf; 986 ACPI_OBJECT param; 987 988 if (handle == NULL) 989 handle = ACPI_ROOT_OBJECT; 990 buf.Pointer = ¶m; 991 buf.Length = sizeof(param); 992 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 993 if (param.Type == ACPI_TYPE_INTEGER) { 994 *number = param.Integer.Value; 995 } else { 996 error = AE_TYPE; 997 } 998 } 999 return(error); 1000 } 1001 1002 /* 1003 * ACPI Event Handlers 1004 */ 1005 1006 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1007 1008 static void 1009 acpi_system_eventhandler_sleep(void *arg, int state) 1010 { 1011 FUNCTION_TRACE_U32(__FUNCTION__, state); 1012 1013 if (state >= ACPI_STATE_S0 && state <= ACPI_STATE_S5) 1014 acpi_SetSleepState((struct acpi_softc *)arg, state); 1015 return_VOID; 1016 } 1017 1018 static void 1019 acpi_system_eventhandler_wakeup(void *arg, int state) 1020 { 1021 FUNCTION_TRACE_U32(__FUNCTION__, state); 1022 1023 /* Well, what to do? :-) */ 1024 1025 return_VOID; 1026 } 1027 1028 /* 1029 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1030 */ 1031 UINT32 1032 acpi_eventhandler_power_button_for_sleep(void *context) 1033 { 1034 struct acpi_softc *sc = (struct acpi_softc *)context; 1035 1036 FUNCTION_TRACE(__FUNCTION__); 1037 1038 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1039 1040 return_VALUE(INTERRUPT_HANDLED); 1041 } 1042 1043 UINT32 1044 acpi_eventhandler_power_button_for_wakeup(void *context) 1045 { 1046 struct acpi_softc *sc = (struct acpi_softc *)context; 1047 1048 FUNCTION_TRACE(__FUNCTION__); 1049 1050 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1051 1052 return_VALUE(INTERRUPT_HANDLED); 1053 } 1054 1055 UINT32 1056 acpi_eventhandler_sleep_button_for_sleep(void *context) 1057 { 1058 struct acpi_softc *sc = (struct acpi_softc *)context; 1059 1060 FUNCTION_TRACE(__FUNCTION__); 1061 1062 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1063 1064 return_VALUE(INTERRUPT_HANDLED); 1065 } 1066 1067 UINT32 1068 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1069 { 1070 struct acpi_softc *sc = (struct acpi_softc *)context; 1071 1072 FUNCTION_TRACE(__FUNCTION__); 1073 1074 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1075 1076 return_VALUE(INTERRUPT_HANDLED); 1077 } 1078 1079 /* 1080 * XXX This is kinda ugly, and should not be here. 1081 */ 1082 struct acpi_staticbuf { 1083 ACPI_BUFFER buffer; 1084 char data[512]; 1085 }; 1086 1087 char * 1088 acpi_strerror(ACPI_STATUS excep) 1089 { 1090 static struct acpi_staticbuf buf; 1091 1092 buf.buffer.Length = 512; 1093 buf.buffer.Pointer = &buf.data[0]; 1094 1095 if (AcpiFormatException(excep, &buf.buffer) == AE_OK) 1096 return(buf.buffer.Pointer); 1097 return("(error formatting exception)"); 1098 } 1099 1100 char * 1101 acpi_name(ACPI_HANDLE handle) 1102 { 1103 static struct acpi_staticbuf buf; 1104 1105 buf.buffer.Length = 512; 1106 buf.buffer.Pointer = &buf.data[0]; 1107 1108 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 1109 return(buf.buffer.Pointer); 1110 return("(unknown path)"); 1111 } 1112 1113 /* 1114 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1115 * parts of the namespace. 1116 */ 1117 int 1118 acpi_avoid(ACPI_HANDLE handle) 1119 { 1120 char *cp, *np; 1121 int len; 1122 1123 np = acpi_name(handle); 1124 if (*np == '\\') 1125 np++; 1126 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1127 return(0); 1128 1129 /* scan the avoid list checking for a match */ 1130 for (;;) { 1131 while ((*cp != 0) && isspace(*cp)) 1132 cp++; 1133 if (*cp == 0) 1134 break; 1135 len = 0; 1136 while ((cp[len] != 0) && !isspace(cp[len])) 1137 len++; 1138 if (!strncmp(cp, np, len)) { 1139 DEBUG_PRINT(TRACE_OBJECTS, ("avoiding '%s'\n", np)); 1140 return(1); 1141 } 1142 cp += len; 1143 } 1144 return(0); 1145 } 1146 1147 /* 1148 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1149 */ 1150 int 1151 acpi_disabled(char *subsys) 1152 { 1153 char *cp; 1154 int len; 1155 1156 if ((cp = getenv("debug.acpi.disable")) == NULL) 1157 return(0); 1158 if (!strcmp(cp, "all")) 1159 return(1); 1160 1161 /* scan the disable list checking for a match */ 1162 for (;;) { 1163 while ((*cp != 0) && isspace(*cp)) 1164 cp++; 1165 if (*cp == 0) 1166 break; 1167 len = 0; 1168 while ((cp[len] != 0) && !isspace(cp[len])) 1169 len++; 1170 if (!strncmp(cp, subsys, len)) { 1171 DEBUG_PRINT(TRACE_OBJECTS, ("disabled '%s'\n", subsys)); 1172 return(1); 1173 } 1174 cp += len; 1175 } 1176 return(0); 1177 } 1178 1179 /* 1180 * Control interface. 1181 * 1182 * We multiplex ioctls for all participating ACPI devices here. Individual 1183 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1184 * interface to make their handlers visible. 1185 */ 1186 struct acpi_ioctl_hook 1187 { 1188 TAILQ_ENTRY(acpi_ioctl_hook) link; 1189 u_long cmd; 1190 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1191 void *arg; 1192 }; 1193 1194 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1195 static int acpi_ioctl_hooks_initted; 1196 1197 /* 1198 * Register an ioctl handler. 1199 */ 1200 int 1201 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1202 { 1203 struct acpi_ioctl_hook *hp; 1204 1205 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1206 return(ENOMEM); 1207 hp->cmd = cmd; 1208 hp->fn = fn; 1209 hp->arg = arg; 1210 if (acpi_ioctl_hooks_initted == 0) { 1211 TAILQ_INIT(&acpi_ioctl_hooks); 1212 acpi_ioctl_hooks_initted = 1; 1213 } 1214 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1215 return(0); 1216 } 1217 1218 /* 1219 * Deregister an ioctl handler. 1220 */ 1221 void 1222 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1223 { 1224 struct acpi_ioctl_hook *hp; 1225 1226 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1227 if ((hp->cmd == cmd) && (hp->fn == fn)) 1228 break; 1229 1230 if (hp != NULL) { 1231 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1232 free(hp, M_ACPIDEV); 1233 } 1234 } 1235 1236 static int 1237 acpiopen(dev_t dev, int flag, int fmt, struct proc *p) 1238 { 1239 return(0); 1240 } 1241 1242 static int 1243 acpiclose(dev_t dev, int flag, int fmt, struct proc *p) 1244 { 1245 return(0); 1246 } 1247 1248 static int 1249 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1250 { 1251 struct acpi_softc *sc; 1252 struct acpi_ioctl_hook *hp; 1253 int error, xerror, state; 1254 1255 error = state = 0; 1256 sc = dev->si_drv1; 1257 1258 /* 1259 * Scan the list of registered ioctls, looking for handlers. 1260 */ 1261 if (acpi_ioctl_hooks_initted) { 1262 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1263 if (hp->cmd == cmd) { 1264 xerror = hp->fn(cmd, addr, hp->arg); 1265 if (xerror != 0) 1266 error = xerror; 1267 goto out; 1268 } 1269 } 1270 } 1271 1272 /* 1273 * Core system ioctls. 1274 */ 1275 switch (cmd) { 1276 case ACPIIO_ENABLE: 1277 if (ACPI_FAILURE(acpi_Enable(sc))) 1278 error = ENXIO; 1279 break; 1280 1281 case ACPIIO_DISABLE: 1282 if (ACPI_FAILURE(acpi_Disable(sc))) 1283 error = ENXIO; 1284 break; 1285 1286 case ACPIIO_SETSLPSTATE: 1287 if (!sc->acpi_enabled) { 1288 error = ENXIO; 1289 break; 1290 } 1291 state = *(int *)addr; 1292 if (state >= ACPI_STATE_S0 && state <= ACPI_STATE_S5) { 1293 acpi_SetSleepState(sc, state); 1294 } else { 1295 error = EINVAL; 1296 } 1297 break; 1298 1299 default: 1300 if (error == 0) 1301 error = EINVAL; 1302 break; 1303 } 1304 1305 out: 1306 return(error); 1307 } 1308 1309 static int 1310 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1311 { 1312 char sleep_state[10]; 1313 int error; 1314 u_int new_state, old_state; 1315 1316 old_state = *(u_int *)oidp->oid_arg1; 1317 if (old_state > ACPI_STATE_S5) 1318 strcpy(sleep_state, "unknown"); 1319 else 1320 strncpy(sleep_state, sleep_state_names[old_state], 1321 sizeof(sleep_state_names[old_state])); 1322 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1323 if (error == 0 && req->newptr != NULL) { 1324 for (new_state = ACPI_STATE_S0; new_state <= ACPI_STATE_S5; new_state++) 1325 if (strncmp(sleep_state, sleep_state_names[new_state], 1326 sizeof(sleep_state)) == 0) 1327 break; 1328 if (new_state != old_state && new_state <= ACPI_STATE_S5) 1329 *(u_int *)oidp->oid_arg1 = new_state; 1330 else 1331 error = EINVAL; 1332 } 1333 return(error); 1334 } 1335 1336 #ifdef ACPI_DEBUG 1337 /* 1338 * Support for parsing debug options from the kernel environment. 1339 * 1340 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1341 * by specifying the names of the bits in the debug.acpi.layer and 1342 * debug.acpi.level environment variables. Bits may be unset by 1343 * prefixing the bit name with !. 1344 */ 1345 struct debugtag 1346 { 1347 char *name; 1348 UINT32 value; 1349 }; 1350 1351 static struct debugtag dbg_layer[] = { 1352 {"GLOBAL", 0x00000001}, 1353 {"COMMON", 0x00000002}, 1354 {"PARSER", 0x00000004}, 1355 {"DISPATCHER", 0x00000008}, 1356 {"INTERPRETER", 0x00000010}, 1357 {"NAMESPACE", 0x00000020}, 1358 {"RESOURCE_MANAGER", 0x00000040}, 1359 {"TABLE_MANAGER", 0x00000080}, 1360 {"EVENT_HANDLING", 0x00000100}, 1361 {"HARDWARE", 0x00000200}, 1362 {"MISCELLANEOUS", 0x00000400}, 1363 {"OS_DEPENDENT", 0x00000800}, 1364 {"BUS_MANAGER", 0x00001000}, 1365 {"PROCESSOR_CONTROL", 0x00002000}, 1366 {"SYSTEM_CONTROL", 0x00004000}, 1367 {"THERMAL_CONTROL", 0x00008000}, 1368 {"POWER_CONTROL", 0x00010000}, 1369 {"EMBEDDED_CONTROLLER", 0x00020000}, 1370 {"BATTERY", 0x00040000}, 1371 {"DEBUGGER", 0x00100000}, 1372 {"ALL_COMPONENTS", 0x001FFFFF}, 1373 {NULL, 0} 1374 }; 1375 1376 static struct debugtag dbg_level[] = { 1377 {"ACPI_OK", 0x00000001}, 1378 {"ACPI_INFO", 0x00000002}, 1379 {"ACPI_WARN", 0x00000004}, 1380 {"ACPI_ERROR", 0x00000008}, 1381 {"ACPI_FATAL", 0x00000010}, 1382 {"ACPI_DEBUG_OBJECT", 0x00000020}, 1383 {"ACPI_ALL", 0x0000003F}, 1384 {"TRACE_PARSE", 0x00000100}, 1385 {"TRACE_DISPATCH", 0x00000200}, 1386 {"TRACE_LOAD", 0x00000400}, 1387 {"TRACE_EXEC", 0x00000800}, 1388 {"TRACE_NAMES", 0x00001000}, 1389 {"TRACE_OPREGION", 0x00002000}, 1390 {"TRACE_BFIELD", 0x00004000}, 1391 {"TRACE_TRASH", 0x00008000}, 1392 {"TRACE_TABLES", 0x00010000}, 1393 {"TRACE_FUNCTIONS", 0x00020000}, 1394 {"TRACE_VALUES", 0x00040000}, 1395 {"TRACE_OBJECTS", 0x00080000}, 1396 {"TRACE_ALLOCATIONS", 0x00100000}, 1397 {"TRACE_RESOURCES", 0x00200000}, 1398 {"TRACE_IO", 0x00400000}, 1399 {"TRACE_INTERRUPTS", 0x00800000}, 1400 {"TRACE_USER_REQUESTS", 0x01000000}, 1401 {"TRACE_PACKAGE", 0x02000000}, 1402 {"TRACE_MUTEX", 0x04000000}, 1403 {"TRACE_ALL", 0x0FFFFF00}, 1404 {"VERBOSE_AML_DISASSEMBLE", 0x10000000}, 1405 {"VERBOSE_INFO", 0x20000000}, 1406 {"VERBOSE_TABLES", 0x40000000}, 1407 {"VERBOSE_EVENTS", 0x80000000}, 1408 {"VERBOSE_ALL", 0xF0000000}, 1409 {NULL, 0} 1410 }; 1411 1412 static void 1413 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1414 { 1415 char *ep; 1416 int i, l; 1417 int set; 1418 1419 while (*cp) { 1420 if (isspace(*cp)) { 1421 cp++; 1422 continue; 1423 } 1424 ep = cp; 1425 while (*ep && !isspace(*ep)) 1426 ep++; 1427 if (*cp == '!') { 1428 set = 0; 1429 cp++; 1430 if (cp == ep) 1431 continue; 1432 } else { 1433 set = 1; 1434 } 1435 l = ep - cp; 1436 for (i = 0; tag[i].name != NULL; i++) { 1437 if (!strncmp(cp, tag[i].name, l)) { 1438 if (set) { 1439 *flag |= tag[i].value; 1440 } else { 1441 *flag &= ~tag[i].value; 1442 } 1443 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1444 } 1445 } 1446 cp = ep; 1447 } 1448 } 1449 1450 static void 1451 acpi_set_debugging(void) 1452 { 1453 char *cp; 1454 1455 AcpiDbgLayer = 0; 1456 AcpiDbgLevel = 0; 1457 if ((cp = getenv("debug.acpi.layer")) != NULL) 1458 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1459 if ((cp = getenv("debug.acpi.level")) != NULL) 1460 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1461 1462 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1463 } 1464 #endif 1465