acpi.c revision 67761
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: head/sys/dev/acpica/acpi.c 67761 2000-10-28 06:59:48Z msmith $ 30 */ 31 32#include "opt_acpi.h" 33#include <sys/param.h> 34#include <sys/kernel.h> 35#include <sys/malloc.h> 36#include <sys/bus.h> 37#include <sys/conf.h> 38#include <sys/ioccom.h> 39#include <sys/reboot.h> 40#include <sys/sysctl.h> 41#include <sys/ctype.h> 42 43#include <machine/clock.h> 44 45#include <machine/resource.h> 46 47#include "acpi.h" 48 49#include <dev/acpica/acpivar.h> 50#include <dev/acpica/acpiio.h> 51 52#include <pci/pcivar.h> 53#include "pcib_if.h" 54 55MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 56 57/* 58 * Character device 59 */ 60 61static d_open_t acpiopen; 62static d_close_t acpiclose; 63static d_ioctl_t acpiioctl; 64 65#define CDEV_MAJOR 152 66static struct cdevsw acpi_cdevsw = { 67 acpiopen, 68 acpiclose, 69 noread, 70 nowrite, 71 acpiioctl, 72 nopoll, 73 nommap, 74 nostrategy, 75 "acpi", 76 CDEV_MAJOR, 77 nodump, 78 nopsize, 79 0, 80 -1 81}; 82 83static void acpi_identify(driver_t *driver, device_t parent); 84static int acpi_probe(device_t dev); 85static int acpi_attach(device_t dev); 86static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 87static int acpi_print_resources(struct resource_list *rl, const char *name, int type, 88 const char *format); 89static int acpi_print_child(device_t bus, device_t child); 90static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 91static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 92static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 93 u_long count); 94static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 95 u_long *countp); 96static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 97 u_long start, u_long end, u_long count, u_int flags); 98static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 99 100static void acpi_probe_children(device_t bus); 101static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 102 103static void acpi_shutdown_pre_sync(void *arg, int howto); 104static void acpi_shutdown_final(void *arg, int howto); 105 106#ifdef ACPI_DEBUG 107static void acpi_set_debugging(void); 108#endif 109 110static void acpi_system_eventhandler_sleep(void *arg, int state); 111static void acpi_system_eventhandler_wakeup(void *arg, int state); 112 113static device_method_t acpi_methods[] = { 114 /* Device interface */ 115 DEVMETHOD(device_identify, acpi_identify), 116 DEVMETHOD(device_probe, acpi_probe), 117 DEVMETHOD(device_attach, acpi_attach), 118 DEVMETHOD(device_shutdown, bus_generic_shutdown), 119 DEVMETHOD(device_suspend, bus_generic_suspend), 120 DEVMETHOD(device_resume, bus_generic_resume), 121 122 /* Bus interface */ 123 DEVMETHOD(bus_add_child, acpi_add_child), 124 DEVMETHOD(bus_print_child, acpi_print_child), 125 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 126 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 127 DEVMETHOD(bus_set_resource, acpi_set_resource), 128 DEVMETHOD(bus_get_resource, acpi_get_resource), 129 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 130 DEVMETHOD(bus_release_resource, acpi_release_resource), 131 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 132 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 133 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 134 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 135 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 136 137 {0, 0} 138}; 139 140static driver_t acpi_driver = { 141 "acpi", 142 acpi_methods, 143 sizeof(struct acpi_softc), 144}; 145 146devclass_t acpi_devclass; 147DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, 0, 0); 148 149SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 150SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 151 152/* 153 * Detect ACPI, perform early initialisation 154 */ 155static void 156acpi_identify(driver_t *driver, device_t parent) 157{ 158 device_t child; 159 void *rsdp; 160 int error; 161#ifdef ENABLE_DEBUGGER 162 char *debugpoint = getenv("debug.acpi.debugger"); 163#endif 164 165 /* 166 * Make sure we're not being doubly invoked. 167 */ 168 if (device_find_child(parent, "acpi", 0) != NULL) 169 return; 170 171#ifdef ACPI_DEBUG 172 acpi_set_debugging(); 173#endif 174 175 /* 176 * Start up ACPICA 177 */ 178#ifdef ENABLE_DEBUGGER 179 if (debugpoint && !strcmp(debugpoint, "init")) 180 acpi_EnterDebugger(); 181#endif 182 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 183 printf("ACPI: initialisation failed: %s\n", acpi_strerror(error)); 184 return; 185 } 186#ifdef ENABLE_DEBUGGER 187 if (debugpoint && !strcmp(debugpoint, "tables")) 188 acpi_EnterDebugger(); 189#endif 190 if (((error = AcpiFindRootPointer(&rsdp)) != AE_OK) || 191 ((error = AcpiLoadTables(rsdp)) != AE_OK)) { 192 printf("ACPI: table load failed: %s\n", acpi_strerror(error)); 193 return; 194 } 195 196 /* 197 * Attach the actual ACPI device. 198 */ 199 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 200 device_printf(parent, "ACPI: could not attach\n"); 201 return; 202 } 203} 204 205/* 206 * Fetch some descriptive data from ACPI to put in our attach message 207 */ 208static int 209acpi_probe(device_t dev) 210{ 211 ACPI_TABLE_HEADER th; 212 char buf[20]; 213 int error; 214 215 if ((error = AcpiGetTableHeader(ACPI_TABLE_RSDT, 1, &th)) != AE_OK) { 216 device_printf(dev, "couldn't get RSDT header: %s\n", acpi_strerror(error)); 217 return(ENXIO); 218 } 219 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 220 device_set_desc_copy(dev, buf); 221 222 return(0); 223} 224 225static int 226acpi_attach(device_t dev) 227{ 228 struct acpi_softc *sc; 229 int error; 230#ifdef ENABLE_DEBUGGER 231 char *debugpoint = getenv("debug.acpi.debugger"); 232#endif 233 234 235 sc = device_get_softc(dev); 236 bzero(sc, sizeof(*sc)); 237 sc->acpi_dev = dev; 238 239#ifdef ENABLE_DEBUGGER 240 if (debugpoint && !strcmp(debugpoint, "spaces")) 241 acpi_EnterDebugger(); 242#endif 243 244 /* 245 * Install the default address space handlers. 246 */ 247 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 248 ADDRESS_SPACE_SYSTEM_MEMORY, 249 ACPI_DEFAULT_HANDLER, 250 NULL, NULL)) != AE_OK) { 251 device_printf(dev, "could not initialise SystemMemory handler: %s\n", acpi_strerror(error)); 252 return(ENXIO); 253 } 254 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 255 ADDRESS_SPACE_SYSTEM_IO, 256 ACPI_DEFAULT_HANDLER, 257 NULL, NULL)) != AE_OK) { 258 device_printf(dev, "could not initialise SystemIO handler: %s\n", acpi_strerror(error)); 259 return(ENXIO); 260 } 261 if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 262 ADDRESS_SPACE_PCI_CONFIG, 263 ACPI_DEFAULT_HANDLER, 264 NULL, NULL)) != AE_OK) { 265 device_printf(dev, "could not initialise PciConfig handler: %s\n", acpi_strerror(error)); 266 return(ENXIO); 267 } 268 269 /* 270 * Bring ACPI fully online. 271 * 272 * Note that we request that device _STA and _INI methods not be run (ACPI_NO_DEVICE_INIT) 273 * and the final object initialisation pass be skipped (ACPI_NO_OBJECT_INIT). 274 * 275 * XXX We need to arrange for the object init pass after we have attached all our 276 * child devices. 277 */ 278#ifdef ENABLE_DEBUGGER 279 if (debugpoint && !strcmp(debugpoint, "enable")) 280 acpi_EnterDebugger(); 281#endif 282 if ((error = AcpiEnableSubsystem(ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT)) != AE_OK) { 283 device_printf(dev, "could not enable ACPI: %s\n", acpi_strerror(error)); 284 return(ENXIO); 285 } 286 287 /* 288 * Dispatch the default sleep state to devices. 289 * TBD: should be configured from userland policy manager. 290 */ 291 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 292 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 293 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 294 295 /* Enable and clear fixed events and install handlers. */ 296 if (AcpiGbl_FACP != NULL && AcpiGbl_FACP->PwrButton == 0) { 297 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 298 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 299 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, acpi_eventhandler_power_button_for_sleep, sc); 300 device_printf(dev, "power button is handled as a fixed feature programming model.\n"); 301 } 302 if (AcpiGbl_FACP != NULL && AcpiGbl_FACP->SleepButton == 0) { 303 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 304 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 305 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, acpi_eventhandler_sleep_button_for_sleep, sc); 306 device_printf(dev, "sleep button is handled as a fixed feature programming model.\n"); 307 } 308 309 /* 310 * Scan the namespace and attach/initialise children. 311 */ 312#ifdef ENABLE_DEBUGGER 313 if (debugpoint && !strcmp(debugpoint, "probe")) 314 acpi_EnterDebugger(); 315#endif 316 acpi_probe_children(dev); 317 318 /* 319 * Register our shutdown handlers 320 */ 321 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 322 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 323 324 /* 325 * Register our acpi event handlers. 326 * XXX should be configurable eg. via userland policy manager. 327 */ 328 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 329 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 330 331 /* 332 * Flag our initial states. 333 */ 334 sc->acpi_enabled = 1; 335 sc->acpi_sstate = ACPI_STATE_S0; 336 337 /* 338 * Create the control device 339 */ 340 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 341 sc->acpi_dev_t->si_drv1 = sc; 342 343#ifdef ENABLE_DEBUGGER 344 if (debugpoint && !strcmp(debugpoint, "running")) 345 acpi_EnterDebugger(); 346#endif 347 return(0); 348} 349 350/* 351 * Handle a new device being added 352 */ 353static device_t 354acpi_add_child(device_t bus, int order, const char *name, int unit) 355{ 356 struct acpi_device *ad; 357 device_t child; 358 359 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 360 return(NULL); 361 bzero(ad, sizeof(*ad)); 362 363 resource_list_init(&ad->ad_rl); 364 365 child = device_add_child_ordered(bus, order, name, unit); 366 if (child != NULL) 367 device_set_ivars(child, ad); 368 return(child); 369} 370 371/* 372 * Print child device resource usage 373 */ 374static int 375acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 376{ 377 struct resource_list_entry *rle; 378 int printed, retval; 379 380 printed = 0; 381 retval = 0; 382 383 if (!SLIST_FIRST(rl)) 384 return(0); 385 386 /* Yes, this is kinda cheating */ 387 SLIST_FOREACH(rle, rl, link) { 388 if (rle->type == type) { 389 if (printed == 0) 390 retval += printf(" %s ", name); 391 else if (printed > 0) 392 retval += printf(","); 393 printed++; 394 retval += printf(format, rle->start); 395 if (rle->count > 1) { 396 retval += printf("-"); 397 retval += printf(format, rle->start + 398 rle->count - 1); 399 } 400 } 401 } 402 return(retval); 403} 404 405static int 406acpi_print_child(device_t bus, device_t child) 407{ 408 struct acpi_device *adev = device_get_ivars(child); 409 struct resource_list *rl = &adev->ad_rl; 410 int retval = 0; 411 412 retval += bus_print_child_header(bus, child); 413 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 414 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 415 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 416 retval += bus_print_child_footer(bus, child); 417 418 return(retval); 419} 420 421 422/* 423 * Handle per-device ivars 424 */ 425static int 426acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 427{ 428 struct acpi_device *ad; 429 430 if ((ad = device_get_ivars(child)) == NULL) { 431 printf("device has no ivars\n"); 432 return(ENOENT); 433 } 434 435 switch(index) { 436 /* ACPI ivars */ 437 case ACPI_IVAR_HANDLE: 438 *(ACPI_HANDLE *)result = ad->ad_handle; 439 break; 440 case ACPI_IVAR_MAGIC: 441 *(int *)result = ad->ad_magic; 442 break; 443 case ACPI_IVAR_PRIVATE: 444 *(void **)result = ad->ad_private; 445 break; 446 447 default: 448 panic("bad ivar read request (%d)\n", index); 449 return(ENOENT); 450 } 451 return(0); 452} 453 454static int 455acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 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 ad->ad_handle = (ACPI_HANDLE)value; 468 break; 469 case ACPI_IVAR_MAGIC: 470 ad->ad_magic = (int )value; 471 break; 472 case ACPI_IVAR_PRIVATE: 473 ad->ad_private = (void *)value; 474 break; 475 476 default: 477 panic("bad ivar write request (%d)\n", index); 478 return(ENOENT); 479 } 480 return(0); 481} 482 483/* 484 * Handle child resource allocation/removal 485 */ 486static int 487acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 488{ 489 struct acpi_device *ad = device_get_ivars(child); 490 struct resource_list *rl = &ad->ad_rl; 491 492 resource_list_add(rl, type, rid, start, start + count -1, count); 493 494 return(0); 495} 496 497static int 498acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 499{ 500 struct acpi_device *ad = device_get_ivars(child); 501 struct resource_list *rl = &ad->ad_rl; 502 struct resource_list_entry *rle; 503 504 rle = resource_list_find(rl, type, rid); 505 if (!rle) 506 return(ENOENT); 507 508 if (startp) 509 *startp = rle->start; 510 if (countp) 511 *countp = rle->count; 512 513 return(0); 514} 515 516static struct resource * 517acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 518 u_long start, u_long end, u_long count, u_int flags) 519{ 520 struct acpi_device *ad = device_get_ivars(child); 521 struct resource_list *rl = &ad->ad_rl; 522 523 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 524} 525 526static int 527acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 528{ 529 struct acpi_device *ad = device_get_ivars(child); 530 struct resource_list *rl = &ad->ad_rl; 531 532 return(resource_list_release(rl, bus, child, type, rid, r)); 533} 534 535/* 536 * Scan relevant portions of the ACPI namespace and attach child devices. 537 * 538 * Note that we only expect to find devices in the \_TZ_, \_SI_ and \_SB_ scopes, 539 * and \_TZ_ becomes obsolete in the ACPI 2.0 spec. 540 */ 541static void 542acpi_probe_children(device_t bus) 543{ 544 ACPI_HANDLE parent; 545 static char *scopes[] = {"\\_TZ_", "\\_SI", "\\_SB_", NULL}; 546 int i; 547 548 /* 549 * Create any static children by calling device identify methods. 550 */ 551 bus_generic_probe(bus); 552 553 /* 554 * Scan the namespace and insert placeholders for all the devices that 555 * we find. 556 * 557 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 558 * we want to create nodes for all devices, not just those that are currently 559 * present. (This assumes that we don't want to create/remove devices as they 560 * appear, which might be smarter.) 561 */ 562 for (i = 0; scopes[i] != NULL; i++) 563 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 564 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 565 566 /* 567 * Scan all of the child devices we have created and let them probe/attach. 568 */ 569 bus_generic_attach(bus); 570 571 /* 572 * Some of these children may have attached others as part of their attach 573 * process (eg. the root PCI bus driver), so rescan. 574 */ 575 bus_generic_attach(bus); 576} 577 578/* 579 * Evaluate a child device and determine whether we might attach a device to 580 * it. 581 */ 582static ACPI_STATUS 583acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 584{ 585 ACPI_OBJECT_TYPE type; 586 device_t child, bus = (device_t)context; 587 588 if (AcpiGetType(handle, &type) == AE_OK) { 589 switch(type) { 590 case ACPI_TYPE_DEVICE: 591 case ACPI_TYPE_PROCESSOR: 592 case ACPI_TYPE_THERMAL: 593 case ACPI_TYPE_POWER: 594 /* 595 * Create a placeholder device for this node. Sort the placeholder 596 * so that the probe/attach passes will run breadth-first. 597 */ 598 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 599 acpi_set_handle(child, handle); 600 } 601 } 602 return(AE_OK); 603} 604 605static void 606acpi_shutdown_pre_sync(void *arg, int howto) 607{ 608 /* 609 * disable all of ACPI events before soft off, otherwise the system 610 * will be turned on again on some laptops. 611 * 612 * XXX this should probably be restricted to masking some events just 613 * before powering down, since we may still need ACPI during the 614 * shutdown process. 615 */ 616 acpi_Disable((struct acpi_softc *)arg); 617} 618 619static void 620acpi_shutdown_final(void *arg, int howto) 621{ 622 ACPI_STATUS status; 623 624 if (howto == RB_POWEROFF) { 625 printf("Power system off using ACPI...\n"); 626 if ((status = AcpiSetSystemSleepState(ACPI_STATE_S5)) != AE_OK) { 627 printf("ACPI power-off failed - %s\n", acpi_strerror(status)); 628 } else { 629 DELAY(1000000); 630 printf("ACPI power-off failed - timeout\n"); 631 } 632 } 633} 634 635/* 636 * Match a HID string against a device 637 */ 638BOOLEAN 639acpi_MatchHid(device_t dev, char *hid) 640{ 641 ACPI_HANDLE h; 642 ACPI_DEVICE_INFO devinfo; 643 ACPI_STATUS error; 644 645 if ((hid == NULL) || (strlen(hid) != 7)) 646 return(FALSE); 647 if ((h = acpi_get_handle(dev)) == NULL) 648 return(FALSE); 649 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 650 return(FALSE); 651 if ((devinfo.Valid & ACPI_VALID_HID) && !strncmp(hid, devinfo.HardwareId, 7)) 652 return(TRUE); 653 return(FALSE); 654} 655 656/* 657 * Perform the tedious double-get procedure required for fetching something into 658 * an ACPI_BUFFER that has not been initialised. 659 */ 660ACPI_STATUS 661acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 662{ 663 ACPI_STATUS status; 664 665 buf->Length = 0; 666 buf->Pointer = NULL; 667 668 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 669 return(status); 670 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 671 return(AE_NO_MEMORY); 672 return(func(handle, buf)); 673} 674 675/* 676 * Allocate a buffer with a preset data size. 677 */ 678ACPI_BUFFER * 679acpi_AllocBuffer(int size) 680{ 681 ACPI_BUFFER *buf; 682 683 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 684 return(NULL); 685 buf->Length = size; 686 buf->Pointer = (void *)(buf + 1); 687 return(buf); 688} 689 690/* 691 * Set the system sleep state 692 * 693 * Currently we only support S1 and S5 694 */ 695ACPI_STATUS 696acpi_SetSleepState(struct acpi_softc *sc, int state) 697{ 698 ACPI_STATUS status = AE_OK; 699 700 switch (state) { 701 case ACPI_STATE_S0: /* XXX only for testing */ 702 status = AcpiSetSystemSleepState((UINT8)state); 703 if (status != AE_OK) { 704 device_printf(sc->acpi_dev, "AcpiSetSystemSleepState failed - %s\n", acpi_strerror(status)); 705 } 706 break; 707 708 case ACPI_STATE_S1: 709 /* 710 * Inform all devices that we are going to sleep. 711 */ 712 if (DEVICE_SUSPEND(root_bus) != 0) { 713 /* 714 * Re-wake the system. 715 * 716 * XXX note that a better two-pass approach with a 'veto' pass 717 * followed by a "real thing" pass would be better, but the 718 * current bus interface does not provide for this. 719 */ 720 DEVICE_RESUME(root_bus); 721 return(AE_ERROR); 722 } 723 sc->acpi_sstate = state; 724 status = AcpiSetSystemSleepState((UINT8)state); 725 if (status != AE_OK) { 726 device_printf(sc->acpi_dev, "AcpiSetSystemSleepState failed - %s\n", acpi_strerror(status)); 727 } 728 DEVICE_RESUME(root_bus); 729 sc->acpi_sstate = ACPI_STATE_S0; 730 break; 731 732 case ACPI_STATE_S5: 733 /* 734 * Shut down cleanly and power off. This will call us back through the 735 * shutdown handlers. 736 */ 737 shutdown_nice(RB_POWEROFF); 738 break; 739 740 default: 741 status = AE_BAD_PARAMETER; 742 break; 743 } 744 return(status); 745} 746 747/* 748 * Enable/Disable ACPI 749 */ 750ACPI_STATUS 751acpi_Enable(struct acpi_softc *sc) 752{ 753 ACPI_STATUS status; 754 u_int32_t flags; 755 756 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 757 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 758 if (!sc->acpi_enabled) { 759 status = AcpiEnableSubsystem(flags); 760 } else { 761 status = AE_OK; 762 } 763 if (status == AE_OK) 764 sc->acpi_enabled = 1; 765 return(status); 766} 767 768ACPI_STATUS 769acpi_Disable(struct acpi_softc *sc) 770{ 771 ACPI_STATUS status; 772 773 if (sc->acpi_enabled) { 774 status = AcpiDisable(); 775 } else { 776 status = AE_OK; 777 } 778 if (status == AE_OK) 779 sc->acpi_enabled = 0; 780 return(status); 781} 782 783/* 784 * Returns true if the device is actually present and should 785 * be attached to. This requires the present, enabled, UI-visible 786 * and diagnostics-passed bits to be set. 787 */ 788BOOLEAN 789acpi_DeviceIsPresent(device_t dev) 790{ 791 ACPI_HANDLE h; 792 ACPI_DEVICE_INFO devinfo; 793 ACPI_STATUS error; 794 795 if ((h = acpi_get_handle(dev)) == NULL) 796 return(FALSE); 797 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 798 return(FALSE); 799 if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) 800 return(TRUE); 801 return(FALSE); 802} 803 804/* 805 * Evaluate a path that should return a number 806 */ 807ACPI_STATUS 808acpi_EvaluateNumber(ACPI_HANDLE handle, char *path, int *number) 809{ 810 ACPI_STATUS error; 811 ACPI_BUFFER buf; 812 int param[4]; 813 814 if (handle == NULL) 815 handle = ACPI_ROOT_OBJECT; 816 buf.Pointer = ¶m[0]; 817 buf.Length = sizeof(param); 818 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 819 if (param[0] == ACPI_TYPE_NUMBER) { 820 *number = param[1]; 821 } else { 822 error = AE_TYPE; 823 } 824 } 825 return(error); 826} 827 828/* 829 * ACPI Event Handlers 830 */ 831 832/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 833 834static void 835acpi_system_eventhandler_sleep(void *arg, int state) 836{ 837 if (state < ACPI_STATE_S0 || state > ACPI_STATE_S5) { 838 return; 839 } 840 841 acpi_SetSleepState((struct acpi_softc *)arg, state); 842} 843 844 845static void 846acpi_system_eventhandler_wakeup(void *arg, int state) 847{ 848 /* Well, what to do? :-) */ 849} 850 851/* 852 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 853 */ 854UINT32 855acpi_eventhandler_power_button_for_sleep(void *context) 856{ 857 struct acpi_softc *sc = (struct acpi_softc *)context; 858 859 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 860 return(INTERRUPT_HANDLED); 861} 862 863UINT32 864acpi_eventhandler_power_button_for_wakeup(void *context) 865{ 866 struct acpi_softc *sc = (struct acpi_softc *)context; 867 868 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 869 return(INTERRUPT_HANDLED); 870} 871 872UINT32 873acpi_eventhandler_sleep_button_for_sleep(void *context) 874{ 875 struct acpi_softc *sc = (struct acpi_softc *)context; 876 877 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 878 return(INTERRUPT_HANDLED); 879} 880 881UINT32 882acpi_eventhandler_sleep_button_for_wakeup(void *context) 883{ 884 struct acpi_softc *sc = (struct acpi_softc *)context; 885 886 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 887 return(INTERRUPT_HANDLED); 888} 889 890/* 891 * XXX This is kinda ugly, and should not be here. 892 */ 893struct acpi_staticbuf { 894 ACPI_BUFFER buffer; 895 char data[512]; 896}; 897 898char * 899acpi_strerror(ACPI_STATUS excep) 900{ 901 static struct acpi_staticbuf buf; 902 903 buf.buffer.Length = 512; 904 buf.buffer.Pointer = &buf.data[0]; 905 906 if (AcpiFormatException(excep, &buf.buffer) == AE_OK) 907 return(buf.buffer.Pointer); 908 return("(error formatting exception)"); 909} 910 911char * 912acpi_name(ACPI_HANDLE handle) 913{ 914 static struct acpi_staticbuf buf; 915 916 buf.buffer.Length = 512; 917 buf.buffer.Pointer = &buf.data[0]; 918 919 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 920 return(buf.buffer.Pointer); 921 return("(unknown path)"); 922} 923 924/* 925 * Debugging/bug-avoidance. Avoid trying to fetch info on various 926 * parts of the namespace. 927 */ 928int 929acpi_avoid(ACPI_HANDLE handle) 930{ 931 char *cp, *np; 932 int len; 933 934 np = acpi_name(handle); 935 if (*np == '\\') 936 np++; 937 if ((cp = getenv("debug.acpi.avoid")) == NULL) 938 return(0); 939 940 /* scan the avoid list checking for a match */ 941 for (;;) { 942 while ((*cp != 0) && isspace(*cp)) 943 cp++; 944 if (*cp == 0) 945 break; 946 len = 0; 947 while ((cp[len] != 0) && !isspace(cp[len])) 948 len++; 949 if (!strncmp(cp, np, len)) { 950 printf("avoiding '%s'\n", np); 951 return(1); 952 } 953 cp += len; 954 } 955 return(0); 956} 957 958/* 959 * Control interface. 960 * 961 * XXX this is provided as a temporary measure for 962 * backwards compatibility for now. A better 963 * interface will probably use sysctl or similar. 964 */ 965static int 966acpiopen(dev_t dev, int flag, int fmt, struct proc * p) 967{ 968 return(0); 969} 970 971static int 972acpiclose(dev_t dev, int flag, int fmt, struct proc * p) 973{ 974 return(0); 975} 976 977static int 978acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc * p) 979{ 980 int error, state; 981 struct acpi_softc *sc; 982 983 error = state = 0; 984 sc = dev->si_drv1; 985 986 switch (cmd) { 987 case ACPIIO_ENABLE: 988 if (ACPI_FAILURE(acpi_Enable(sc))) { 989 error = ENXIO; 990 } 991 break; 992 993 case ACPIIO_DISABLE: 994 if (ACPI_FAILURE(acpi_Disable(sc))) { 995 error = ENXIO; 996 } 997 break; 998 999 case ACPIIO_SETSLPSTATE: 1000 if (!sc->acpi_enabled) { 1001 error = ENXIO; 1002 break; 1003 } 1004 state = *(int *)addr; 1005 if (state >= ACPI_STATE_S0 && state <= ACPI_STATE_S5) { 1006 acpi_SetSleepState(sc, state); 1007 } else { 1008 error = EINVAL; 1009 } 1010 1011 break; 1012 1013 default: 1014 error = EINVAL; 1015 break; 1016 } 1017 1018 return(error); 1019} 1020 1021#ifdef ACPI_DEBUG 1022struct debugtag 1023{ 1024 char *name; 1025 UINT32 value; 1026}; 1027 1028static struct debugtag dbg_layer[] = { 1029 {"GLOBAL", 0x00000001}, 1030 {"COMMON", 0x00000002}, 1031 {"PARSER", 0x00000004}, 1032 {"DISPATCHER", 0x00000008}, 1033 {"INTERPRETER", 0x00000010}, 1034 {"NAMESPACE", 0x00000020}, 1035 {"RESOURCE_MANAGER", 0x00000040}, 1036 {"TABLE_MANAGER", 0x00000080}, 1037 {"EVENT_HANDLING", 0x00000100}, 1038 {"HARDWARE", 0x00000200}, 1039 {"MISCELLANEOUS", 0x00000400}, 1040 {"OS_DEPENDENT", 0x00000800}, 1041 {"BUS_MANAGER", 0x00001000}, 1042 {"PROCESSOR_CONTROL", 0x00002000}, 1043 {"SYSTEM_CONTROL", 0x00004000}, 1044 {"THERMAL_CONTROL", 0x00008000}, 1045 {"POWER_CONTROL", 0x00010000}, 1046 {"EMBEDDED_CONTROLLER", 0x00020000}, 1047 {"BATTERY", 0x00040000}, 1048 {"DEBUGGER", 0x00100000}, 1049 {"ALL_COMPONENTS", 0x001FFFFF}, 1050 {NULL, 0} 1051}; 1052 1053static struct debugtag dbg_level[] = { 1054 {"ACPI_OK", 0x00000001}, 1055 {"ACPI_INFO", 0x00000002}, 1056 {"ACPI_WARN", 0x00000004}, 1057 {"ACPI_ERROR", 0x00000008}, 1058 {"ACPI_FATAL", 0x00000010}, 1059 {"ACPI_DEBUG_OBJECT", 0x00000020}, 1060 {"ACPI_ALL", 0x0000003F}, 1061 {"TRACE_PARSE", 0x00000100}, 1062 {"TRACE_DISPATCH", 0x00000200}, 1063 {"TRACE_LOAD", 0x00000400}, 1064 {"TRACE_EXEC", 0x00000800}, 1065 {"TRACE_NAMES", 0x00001000}, 1066 {"TRACE_OPREGION", 0x00002000}, 1067 {"TRACE_BFIELD", 0x00004000}, 1068 {"TRACE_TRASH", 0x00008000}, 1069 {"TRACE_TABLES", 0x00010000}, 1070 {"TRACE_FUNCTIONS", 0x00020000}, 1071 {"TRACE_VALUES", 0x00040000}, 1072 {"TRACE_OBJECTS", 0x00080000}, 1073 {"TRACE_ALLOCATIONS", 0x00100000}, 1074 {"TRACE_RESOURCES", 0x00200000}, 1075 {"TRACE_IO", 0x00400000}, 1076 {"TRACE_INTERRUPTS", 0x00800000}, 1077 {"TRACE_USER_REQUESTS", 0x01000000}, 1078 {"TRACE_PACKAGE", 0x02000000}, 1079 {"TRACE_MUTEX", 0x04000000}, 1080 {"TRACE_ALL", 0x0FFFFF00}, 1081 {"VERBOSE_AML_DISASSEMBLE", 0x10000000}, 1082 {"VERBOSE_INFO", 0x20000000}, 1083 {"VERBOSE_TABLES", 0x40000000}, 1084 {"VERBOSE_EVENTS", 0x80000000}, 1085 {"VERBOSE_ALL", 0xF0000000}, 1086 {NULL, 0} 1087}; 1088 1089static void 1090acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1091{ 1092 char *ep; 1093 int i, l; 1094 1095 while (*cp) { 1096 if (isspace(*cp)) { 1097 cp++; 1098 continue; 1099 } 1100 ep = cp; 1101 while (*ep && !isspace(*ep)) 1102 ep++; 1103 l = ep - cp; 1104 for (i = 0; tag[i].name != NULL; i++) { 1105 if (!strncmp(cp, tag[i].name, l)) { 1106 *flag |= tag[i].value; 1107 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1108 } 1109 } 1110 cp = ep; 1111 } 1112} 1113 1114static void 1115acpi_set_debugging(void) 1116{ 1117 char *cp; 1118 1119 if ((cp = getenv("debug.acpi.layer")) != NULL) 1120 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1121 if ((cp = getenv("debug.acpi.level")) != NULL) 1122 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1123} 1124#endif 1125