acpi.c revision 85556
1/*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/dev/acpica/acpi.c 85556 2001-10-26 17:43:05Z iwasaki $ 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#include <machine/resource.h> 48 49#include <isa/isavar.h> 50 51#include "acpi.h" 52 53#include <dev/acpica/acpivar.h> 54#include <dev/acpica/acpiio.h> 55 56MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 57 58/* 59 * Hooks for the ACPI CA debugging infrastructure 60 */ 61#define _COMPONENT ACPI_BUS 62MODULE_NAME("ACPI") 63 64/* 65 * Character device 66 */ 67 68static d_open_t acpiopen; 69static d_close_t acpiclose; 70static d_ioctl_t acpiioctl; 71 72#define CDEV_MAJOR 152 73static struct cdevsw acpi_cdevsw = { 74 acpiopen, 75 acpiclose, 76 noread, 77 nowrite, 78 acpiioctl, 79 nopoll, 80 nommap, 81 nostrategy, 82 "acpi", 83 CDEV_MAJOR, 84 nodump, 85 nopsize, 86 0 87}; 88 89static const char* sleep_state_names[] = { 90 "S0", "S1", "S2", "S3", "S4", "S5", "S4B" }; 91 92/* this has to be static, as the softc is gone when we need it */ 93static int acpi_off_state = ACPI_STATE_S5; 94 95struct mtx acpi_mutex; 96 97static int acpi_modevent(struct module *mod, int event, void *junk); 98static void acpi_identify(driver_t *driver, device_t parent); 99static int acpi_probe(device_t dev); 100static int acpi_attach(device_t dev); 101static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 102static int acpi_print_resources(struct resource_list *rl, const char *name, int type, 103 const char *format); 104static int acpi_print_child(device_t bus, device_t child); 105static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 106static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 107static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 108 u_long count); 109static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 110 u_long *countp); 111static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 112 u_long start, u_long end, u_long count, u_int flags); 113static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 114static u_int32_t acpi_isa_get_logicalid(device_t dev); 115static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 116 117static void acpi_probe_children(device_t bus); 118static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 119 120static void acpi_shutdown_pre_sync(void *arg, int howto); 121static void acpi_shutdown_final(void *arg, int howto); 122 123static void acpi_enable_fixed_events(struct acpi_softc *sc); 124 125static void acpi_system_eventhandler_sleep(void *arg, int state); 126static void acpi_system_eventhandler_wakeup(void *arg, int state); 127static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 128 129static device_method_t acpi_methods[] = { 130 /* Device interface */ 131 DEVMETHOD(device_identify, acpi_identify), 132 DEVMETHOD(device_probe, acpi_probe), 133 DEVMETHOD(device_attach, acpi_attach), 134 DEVMETHOD(device_shutdown, bus_generic_shutdown), 135 DEVMETHOD(device_suspend, bus_generic_suspend), 136 DEVMETHOD(device_resume, bus_generic_resume), 137 138 /* Bus interface */ 139 DEVMETHOD(bus_add_child, acpi_add_child), 140 DEVMETHOD(bus_print_child, acpi_print_child), 141 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 142 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 143 DEVMETHOD(bus_set_resource, acpi_set_resource), 144 DEVMETHOD(bus_get_resource, acpi_get_resource), 145 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 146 DEVMETHOD(bus_release_resource, acpi_release_resource), 147 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 148 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 149 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 150 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 151 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 152 153 /* ISA emulation */ 154 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 155 156 {0, 0} 157}; 158 159static driver_t acpi_driver = { 160 "acpi", 161 acpi_methods, 162 sizeof(struct acpi_softc), 163}; 164 165devclass_t acpi_devclass; 166DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 167MODULE_VERSION(acpi, 100); 168 169SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 170SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 171static int acpi_ca_version = ACPI_CA_VERSION; 172SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 173 174/* 175 * ACPI can only be loaded as a module by the loader; activating it after 176 * system bootstrap time is not useful, and can be fatal to the system. 177 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 178 */ 179static int 180acpi_modevent(struct module *mod, int event, void *junk) 181{ 182 switch(event) { 183 case MOD_LOAD: 184 if (!cold) 185 return(EPERM); 186 break; 187 case MOD_UNLOAD: 188 return(EBUSY); 189 default: 190 break; 191 } 192 return(0); 193} 194 195/* 196 * Detect ACPI, perform early initialisation 197 */ 198static void 199acpi_identify(driver_t *driver, device_t parent) 200{ 201 device_t child; 202 int error; 203#ifdef ENABLE_DEBUGGER 204 char *debugpoint = getenv("debug.acpi.debugger"); 205#endif 206 207 FUNCTION_TRACE(__func__); 208 209 if(!cold){ 210 printf("Don't load this driver from userland!!\n"); 211 return ; 212 } 213 214 /* 215 * Check that we haven't been disabled with a hint. 216 */ 217 if (!resource_int_value("acpi", 0, "disabled", &error) && 218 (error != 0)) 219 return_VOID; 220 221 /* 222 * Make sure we're not being doubly invoked. 223 */ 224 if (device_find_child(parent, "acpi", 0) != NULL) 225 return_VOID; 226 227 /* initialise the ACPI mutex */ 228 mtx_init(&acpi_mutex, "ACPI global lock", MTX_DEF); 229 230 /* 231 * Start up the ACPI CA subsystem. 232 */ 233#ifdef ENABLE_DEBUGGER 234 if (debugpoint && !strcmp(debugpoint, "init")) 235 acpi_EnterDebugger(); 236#endif 237 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 238 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 239 return_VOID; 240 } 241#ifdef ENABLE_DEBUGGER 242 if (debugpoint && !strcmp(debugpoint, "tables")) 243 acpi_EnterDebugger(); 244#endif 245 if ((error = AcpiLoadTables()) != AE_OK) { 246 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 247 return_VOID; 248 } 249 250 /* 251 * Attach the actual ACPI device. 252 */ 253 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 254 device_printf(parent, "ACPI: could not attach\n"); 255 return_VOID; 256 } 257} 258 259/* 260 * Fetch some descriptive data from ACPI to put in our attach message 261 */ 262static int 263acpi_probe(device_t dev) 264{ 265 ACPI_TABLE_HEADER th; 266 char buf[20]; 267 ACPI_STATUS status; 268 int error; 269 270 FUNCTION_TRACE(__func__); 271 ACPI_LOCK; 272 273 if ((status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) { 274 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 275 error = ENXIO; 276 } else { 277 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 278 device_set_desc_copy(dev, buf); 279 error = 0; 280 } 281 ACPI_UNLOCK; 282 return_VALUE(error); 283} 284 285static int 286acpi_attach(device_t dev) 287{ 288 struct acpi_softc *sc; 289 ACPI_STATUS status; 290 int error; 291 UINT32 flags; 292 293#ifdef ENABLE_DEBUGGER 294 char *debugpoint = getenv("debug.acpi.debugger"); 295#endif 296 297 FUNCTION_TRACE(__func__); 298 ACPI_LOCK; 299 sc = device_get_softc(dev); 300 bzero(sc, sizeof(*sc)); 301 sc->acpi_dev = dev; 302 303#ifdef ENABLE_DEBUGGER 304 if (debugpoint && !strcmp(debugpoint, "spaces")) 305 acpi_EnterDebugger(); 306#endif 307 308 /* 309 * Install the default address space handlers. 310 */ 311 error = ENXIO; 312 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 313 ACPI_ADR_SPACE_SYSTEM_MEMORY, 314 ACPI_DEFAULT_HANDLER, 315 NULL, NULL)) != AE_OK) { 316 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 317 goto out; 318 } 319 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 320 ACPI_ADR_SPACE_SYSTEM_IO, 321 ACPI_DEFAULT_HANDLER, 322 NULL, NULL)) != AE_OK) { 323 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 324 goto out; 325 } 326 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 327 ACPI_ADR_SPACE_PCI_CONFIG, 328 ACPI_DEFAULT_HANDLER, 329 NULL, NULL)) != AE_OK) { 330 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 331 goto out; 332 } 333 334 /* 335 * Bring ACPI fully online. 336 * 337 * Note that some systems (specifically, those with namespace evaluation issues 338 * that require the avoidance of parts of the namespace) must avoid running _INI 339 * and _STA on everything, as well as dodging the final object init pass. 340 * 341 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 342 * 343 * XXX We should arrange for the object init pass after we have attached all our 344 * child devices, but on many systems it works here. 345 */ 346#ifdef ENABLE_DEBUGGER 347 if (debugpoint && !strcmp(debugpoint, "enable")) 348 acpi_EnterDebugger(); 349#endif 350 flags = 0; 351 if (getenv("debug.acpi.avoid") != NULL) 352 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 353 if ((status = AcpiEnableSubsystem(flags)) != AE_OK) { 354 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 355 goto out; 356 } 357 358 /* 359 * Setup our sysctl tree. 360 * 361 * XXX: This doesn't check to make sure that none of these fail. 362 */ 363 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 364 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 365 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 366 device_get_name(dev), CTLFLAG_RD, 0, ""); 367 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 368 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 369 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 370 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 371 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 372 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 373 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 374 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 375 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 376 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 377 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 378 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 379 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 380 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 381 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 382 383 /* 384 * Dispatch the default sleep state to devices. 385 * TBD: should be configured from userland policy manager. 386 */ 387 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 388 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 389 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 390 sc->acpi_standby_sx = ACPI_STATE_S1; 391 sc->acpi_suspend_sx = ACPI_STATE_S3; 392 393 acpi_enable_fixed_events(sc); 394 395 /* 396 * Scan the namespace and attach/initialise children. 397 */ 398#ifdef ENABLE_DEBUGGER 399 if (debugpoint && !strcmp(debugpoint, "probe")) 400 acpi_EnterDebugger(); 401#endif 402 if (!acpi_disabled("bus")) 403 acpi_probe_children(dev); 404 405 /* 406 * Register our shutdown handlers 407 */ 408 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 409 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 410 411 /* 412 * Register our acpi event handlers. 413 * XXX should be configurable eg. via userland policy manager. 414 */ 415 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 416 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 417 418 /* 419 * Flag our initial states. 420 */ 421 sc->acpi_enabled = 1; 422 sc->acpi_sstate = ACPI_STATE_S0; 423 424 /* 425 * Create the control device 426 */ 427 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 428 sc->acpi_dev_t->si_drv1 = sc; 429 430#ifdef ENABLE_DEBUGGER 431 if (debugpoint && !strcmp(debugpoint, "running")) 432 acpi_EnterDebugger(); 433#endif 434 435 if ((error = acpi_machdep_init(dev))) { 436 goto out; 437 } 438 439 error = 0; 440 441 out: 442 ACPI_UNLOCK; 443 return_VALUE(error); 444} 445 446/* 447 * Handle a new device being added 448 */ 449static device_t 450acpi_add_child(device_t bus, int order, const char *name, int unit) 451{ 452 struct acpi_device *ad; 453 device_t child; 454 455 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 456 return(NULL); 457 bzero(ad, sizeof(*ad)); 458 459 resource_list_init(&ad->ad_rl); 460 461 child = device_add_child_ordered(bus, order, name, unit); 462 if (child != NULL) 463 device_set_ivars(child, ad); 464 return(child); 465} 466 467/* 468 * Print child device resource usage 469 */ 470static int 471acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 472{ 473 struct resource_list_entry *rle; 474 int printed, retval; 475 476 printed = 0; 477 retval = 0; 478 479 if (!SLIST_FIRST(rl)) 480 return(0); 481 482 /* Yes, this is kinda cheating */ 483 SLIST_FOREACH(rle, rl, link) { 484 if (rle->type == type) { 485 if (printed == 0) 486 retval += printf(" %s ", name); 487 else if (printed > 0) 488 retval += printf(","); 489 printed++; 490 retval += printf(format, rle->start); 491 if (rle->count > 1) { 492 retval += printf("-"); 493 retval += printf(format, rle->start + 494 rle->count - 1); 495 } 496 } 497 } 498 return(retval); 499} 500 501static int 502acpi_print_child(device_t bus, device_t child) 503{ 504 struct acpi_device *adev = device_get_ivars(child); 505 struct resource_list *rl = &adev->ad_rl; 506 int retval = 0; 507 508 retval += bus_print_child_header(bus, child); 509 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 510 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 511 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 512 retval += bus_print_child_footer(bus, child); 513 514 return(retval); 515} 516 517 518/* 519 * Handle per-device ivars 520 */ 521static int 522acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 523{ 524 struct acpi_device *ad; 525 526 if ((ad = device_get_ivars(child)) == NULL) { 527 printf("device has no ivars\n"); 528 return(ENOENT); 529 } 530 531 switch(index) { 532 /* ACPI ivars */ 533 case ACPI_IVAR_HANDLE: 534 *(ACPI_HANDLE *)result = ad->ad_handle; 535 break; 536 case ACPI_IVAR_MAGIC: 537 *(int *)result = ad->ad_magic; 538 break; 539 case ACPI_IVAR_PRIVATE: 540 *(void **)result = ad->ad_private; 541 break; 542 543 /* ISA compatibility */ 544 case ISA_IVAR_VENDORID: 545 case ISA_IVAR_SERIAL: 546 case ISA_IVAR_COMPATID: 547 *(int *)result = -1; 548 break; 549 550 case ISA_IVAR_LOGICALID: 551 *(int *)result = acpi_isa_get_logicalid(child); 552 break; 553 554 default: 555 panic("bad ivar read request (%d)\n", index); 556 return(ENOENT); 557 } 558 return(0); 559} 560 561static int 562acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 563{ 564 struct acpi_device *ad; 565 566 if ((ad = device_get_ivars(child)) == NULL) { 567 printf("device has no ivars\n"); 568 return(ENOENT); 569 } 570 571 switch(index) { 572 /* ACPI ivars */ 573 case ACPI_IVAR_HANDLE: 574 ad->ad_handle = (ACPI_HANDLE)value; 575 break; 576 case ACPI_IVAR_MAGIC: 577 ad->ad_magic = (int )value; 578 break; 579 case ACPI_IVAR_PRIVATE: 580 ad->ad_private = (void *)value; 581 break; 582 583 default: 584 panic("bad ivar write request (%d)\n", index); 585 return(ENOENT); 586 } 587 return(0); 588} 589 590/* 591 * Handle child resource allocation/removal 592 */ 593static int 594acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 595{ 596 struct acpi_device *ad = device_get_ivars(child); 597 struct resource_list *rl = &ad->ad_rl; 598 599 resource_list_add(rl, type, rid, start, start + count -1, count); 600 601 return(0); 602} 603 604static int 605acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 606{ 607 struct acpi_device *ad = device_get_ivars(child); 608 struct resource_list *rl = &ad->ad_rl; 609 struct resource_list_entry *rle; 610 611 rle = resource_list_find(rl, type, rid); 612 if (!rle) 613 return(ENOENT); 614 615 if (startp) 616 *startp = rle->start; 617 if (countp) 618 *countp = rle->count; 619 620 return(0); 621} 622 623static struct resource * 624acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 625 u_long start, u_long end, u_long count, u_int flags) 626{ 627 struct acpi_device *ad = device_get_ivars(child); 628 struct resource_list *rl = &ad->ad_rl; 629 630 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 631} 632 633static int 634acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 635{ 636 struct acpi_device *ad = device_get_ivars(child); 637 struct resource_list *rl = &ad->ad_rl; 638 639 return(resource_list_release(rl, bus, child, type, rid, r)); 640} 641 642/* 643 * Handle ISA-like devices probing for a PnP ID to match. 644 */ 645#define PNP_EISAID(s) \ 646 ((((s[0] - '@') & 0x1f) << 2) \ 647 | (((s[1] - '@') & 0x18) >> 3) \ 648 | (((s[1] - '@') & 0x07) << 13) \ 649 | (((s[2] - '@') & 0x1f) << 8) \ 650 | (PNP_HEXTONUM(s[4]) << 16) \ 651 | (PNP_HEXTONUM(s[3]) << 20) \ 652 | (PNP_HEXTONUM(s[6]) << 24) \ 653 | (PNP_HEXTONUM(s[5]) << 28)) 654 655static u_int32_t 656acpi_isa_get_logicalid(device_t dev) 657{ 658 ACPI_HANDLE h; 659 ACPI_DEVICE_INFO devinfo; 660 ACPI_STATUS error; 661 u_int32_t pnpid; 662 663 FUNCTION_TRACE(__func__); 664 665 pnpid = 0; 666 ACPI_LOCK; 667 668 /* fetch and validate the HID */ 669 if ((h = acpi_get_handle(dev)) == NULL) 670 goto out; 671 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 672 goto out; 673 if (!(devinfo.Valid & ACPI_VALID_HID)) 674 goto out; 675 676 pnpid = PNP_EISAID(devinfo.HardwareId); 677out: 678 ACPI_UNLOCK; 679 return_VALUE(pnpid); 680} 681 682static int 683acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 684{ 685 int result; 686 u_int32_t pnpid; 687 688 FUNCTION_TRACE(__func__); 689 690 /* 691 * ISA-style drivers attached to ACPI may persist and 692 * probe manually if we return ENOENT. We never want 693 * that to happen, so don't ever return it. 694 */ 695 result = ENXIO; 696 697 /* scan the supplied IDs for a match */ 698 pnpid = acpi_isa_get_logicalid(child); 699 while (ids && ids->ip_id) { 700 if (pnpid == ids->ip_id) { 701 result = 0; 702 goto out; 703 } 704 ids++; 705 } 706 out: 707 return_VALUE(result); 708} 709 710/* 711 * Scan relevant portions of the ACPI namespace and attach child devices. 712 * 713 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 714 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 715 */ 716static void 717acpi_probe_children(device_t bus) 718{ 719 ACPI_HANDLE parent; 720 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 721 int i; 722 723 FUNCTION_TRACE(__func__); 724 ACPI_ASSERTLOCK; 725 726 /* 727 * Create any static children by calling device identify methods. 728 */ 729 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 730 bus_generic_probe(bus); 731 732 /* 733 * Scan the namespace and insert placeholders for all the devices that 734 * we find. 735 * 736 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 737 * we want to create nodes for all devices, not just those that are currently 738 * present. (This assumes that we don't want to create/remove devices as they 739 * appear, which might be smarter.) 740 */ 741 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 742 for (i = 0; scopes[i] != NULL; i++) 743 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 744 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 745 746 /* 747 * Scan all of the child devices we have created and let them probe/attach. 748 */ 749 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 750 bus_generic_attach(bus); 751 752 /* 753 * Some of these children may have attached others as part of their attach 754 * process (eg. the root PCI bus driver), so rescan. 755 */ 756 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 757 bus_generic_attach(bus); 758 759 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 760 return_VOID; 761} 762 763/* 764 * Evaluate a child device and determine whether we might attach a device to 765 * it. 766 */ 767static ACPI_STATUS 768acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 769{ 770 ACPI_OBJECT_TYPE type; 771 device_t child, bus = (device_t)context; 772 773 FUNCTION_TRACE(__func__); 774 775 /* 776 * Skip this device if we think we'll have trouble with it. 777 */ 778 if (acpi_avoid(handle)) 779 return_ACPI_STATUS(AE_OK); 780 781 if (AcpiGetType(handle, &type) == AE_OK) { 782 switch(type) { 783 case ACPI_TYPE_DEVICE: 784 case ACPI_TYPE_PROCESSOR: 785 case ACPI_TYPE_THERMAL: 786 case ACPI_TYPE_POWER: 787 if (acpi_disabled("children")) 788 break; 789 /* 790 * Create a placeholder device for this node. Sort the placeholder 791 * so that the probe/attach passes will run breadth-first. 792 */ 793 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 794 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 795 if (child == NULL) 796 break; 797 acpi_set_handle(child, handle); 798 799 /* 800 * Check that the device is present. If it's not present, 801 * leave it disabled (so that we have a device_t attached to 802 * the handle, but we don't probe it). 803 */ 804 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 805 device_disable(child); 806 break; 807 } 808 809 /* 810 * Get the device's resource settings and attach them. 811 * Note that if the device has _PRS but no _CRS, we need 812 * to decide when it's appropriate to try to configure the 813 * device. Ignore the return value here; it's OK for the 814 * device not to have any resources. 815 */ 816 acpi_parse_resources(child, handle, &acpi_res_parse_set); 817 818 /* if we're debugging, probe/attach now rather than later */ 819 DEBUG_EXEC(device_probe_and_attach(child)); 820 break; 821 } 822 } 823 return_ACPI_STATUS(AE_OK); 824} 825 826static void 827acpi_shutdown_pre_sync(void *arg, int howto) 828{ 829 830 ACPI_ASSERTLOCK; 831 832 /* 833 * Disable all ACPI events before soft off, otherwise the system 834 * will be turned on again on some laptops. 835 * 836 * XXX this should probably be restricted to masking some events just 837 * before powering down, since we may still need ACPI during the 838 * shutdown process. 839 */ 840 acpi_Disable((struct acpi_softc *)arg); 841} 842 843static void 844acpi_shutdown_final(void *arg, int howto) 845{ 846 ACPI_STATUS status; 847 848 ACPI_ASSERTLOCK; 849 850 if (howto & RB_POWEROFF) { 851 printf("Power system off using ACPI...\n"); 852 if ((status = AcpiEnterSleepState(acpi_off_state)) != AE_OK) { 853 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 854 } else { 855 DELAY(1000000); 856 printf("ACPI power-off failed - timeout\n"); 857 } 858 } 859} 860 861static void 862acpi_enable_fixed_events(struct acpi_softc *sc) 863{ 864 static int first_time = 1; 865#define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 866 867 ACPI_ASSERTLOCK; 868 869 /* Enable and clear fixed events and install handlers. */ 870 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 871 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0); 872 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 873 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 874 acpi_eventhandler_power_button_for_sleep, sc); 875 if (first_time) { 876 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 877 } 878 } 879 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 880 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0); 881 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 882 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 883 acpi_eventhandler_sleep_button_for_sleep, sc); 884 if (first_time) { 885 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 886 } 887 } 888 889 first_time = 0; 890} 891 892/* 893 * Returns true if the device is actually present and should 894 * be attached to. This requires the present, enabled, UI-visible 895 * and diagnostics-passed bits to be set. 896 */ 897BOOLEAN 898acpi_DeviceIsPresent(device_t dev) 899{ 900 ACPI_HANDLE h; 901 ACPI_DEVICE_INFO devinfo; 902 ACPI_STATUS error; 903 904 ACPI_ASSERTLOCK; 905 906 if ((h = acpi_get_handle(dev)) == NULL) 907 return(FALSE); 908 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 909 return(FALSE); 910 /* if no _STA method, must be present */ 911 if (!(devinfo.Valid & ACPI_VALID_STA)) 912 return(TRUE); 913 /* return true for 'present' and 'functioning' */ 914 if ((devinfo.CurrentStatus & 0x9) == 0x9) 915 return(TRUE); 916 return(FALSE); 917} 918 919/* 920 * Match a HID string against a device 921 */ 922BOOLEAN 923acpi_MatchHid(device_t dev, char *hid) 924{ 925 ACPI_HANDLE h; 926 ACPI_DEVICE_INFO devinfo; 927 ACPI_STATUS error; 928 int cid; 929 930 ACPI_ASSERTLOCK; 931 932 if (hid == NULL) 933 return(FALSE); 934 if ((h = acpi_get_handle(dev)) == NULL) 935 return(FALSE); 936 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 937 return(FALSE); 938 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 939 return(TRUE); 940 if ((error = acpi_EvaluateInteger(h, "_CID", &cid)) != AE_OK) 941 return(FALSE); 942 if (cid == PNP_EISAID(hid)) 943 return(TRUE); 944 return(FALSE); 945} 946 947/* 948 * Return the handle of a named object within our scope, ie. that of (parent) 949 * or one if its parents. 950 */ 951ACPI_STATUS 952acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 953{ 954 ACPI_HANDLE r; 955 ACPI_STATUS status; 956 957 ACPI_ASSERTLOCK; 958 959 /* walk back up the tree to the root */ 960 for (;;) { 961 status = AcpiGetHandle(parent, path, &r); 962 if (status == AE_OK) { 963 *result = r; 964 return(AE_OK); 965 } 966 if (status != AE_NOT_FOUND) 967 return(AE_OK); 968 if (AcpiGetParent(parent, &r) != AE_OK) 969 return(AE_NOT_FOUND); 970 parent = r; 971 } 972} 973 974/* 975 * Allocate a buffer with a preset data size. 976 */ 977ACPI_BUFFER * 978acpi_AllocBuffer(int size) 979{ 980 ACPI_BUFFER *buf; 981 982 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 983 return(NULL); 984 buf->Length = size; 985 buf->Pointer = (void *)(buf + 1); 986 return(buf); 987} 988 989/* 990 * Perform the tedious double-get procedure required for fetching something into 991 * an ACPI_BUFFER that has not been initialised. 992 */ 993ACPI_STATUS 994acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 995{ 996 ACPI_STATUS status; 997 998 ACPI_ASSERTLOCK; 999 1000 buf->Length = 0; 1001 buf->Pointer = NULL; 1002 1003 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 1004 return(status); 1005 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 1006 return(AE_NO_MEMORY); 1007 return(func(handle, buf)); 1008} 1009 1010/* 1011 * Perform the tedious double-get procedure required for fetching a table into 1012 * an ACPI_BUFFER that has not been initialised. 1013 */ 1014ACPI_STATUS 1015acpi_GetTableIntoBuffer(ACPI_TABLE_TYPE table, UINT32 instance, ACPI_BUFFER *buf) 1016{ 1017 ACPI_STATUS status; 1018 1019 ACPI_ASSERTLOCK; 1020 1021 buf->Length = 0; 1022 buf->Pointer = NULL; 1023 1024 if ((status = AcpiGetTable(table, instance, buf)) != AE_BUFFER_OVERFLOW) 1025 return(status); 1026 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 1027 return(AE_NO_MEMORY); 1028 return(AcpiGetTable(table, instance, buf)); 1029} 1030 1031/* 1032 * Perform the tedious double-evaluate procedure for evaluating something into 1033 * an ACPI_BUFFER that has not been initialised. Note that this evaluates 1034 * twice, so avoid applying this to things that may have side-effects. 1035 * 1036 * This is like AcpiEvaluateObject with automatic buffer allocation. 1037 */ 1038ACPI_STATUS 1039acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname, ACPI_OBJECT_LIST *params, 1040 ACPI_BUFFER *buf) 1041{ 1042 ACPI_STATUS status; 1043 1044 ACPI_ASSERTLOCK; 1045 1046 buf->Length = 0; 1047 buf->Pointer = NULL; 1048 1049 if ((status = AcpiEvaluateObject(object, pathname, params, buf)) != AE_BUFFER_OVERFLOW) 1050 return(status); 1051 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 1052 return(AE_NO_MEMORY); 1053 return(AcpiEvaluateObject(object, pathname, params, buf)); 1054} 1055 1056/* 1057 * Evaluate a path that should return an integer. 1058 */ 1059ACPI_STATUS 1060acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1061{ 1062 ACPI_STATUS error; 1063 ACPI_BUFFER buf; 1064 ACPI_OBJECT param, *p; 1065 int i; 1066 1067 ACPI_ASSERTLOCK; 1068 1069 if (handle == NULL) 1070 handle = ACPI_ROOT_OBJECT; 1071 1072 /* 1073 * Assume that what we've been pointed at is an Integer object, or 1074 * a method that will return an Integer. 1075 */ 1076 buf.Pointer = ¶m; 1077 buf.Length = sizeof(param); 1078 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1079 if (param.Type == ACPI_TYPE_INTEGER) { 1080 *number = param.Integer.Value; 1081 } else { 1082 error = AE_TYPE; 1083 } 1084 } 1085 1086 /* 1087 * In some applications, a method that's expected to return an Integer 1088 * may instead return a Buffer (probably to simplify some internal 1089 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1090 * convert it into an Integer as best we can. 1091 * 1092 * This is a hack. 1093 */ 1094 if (error == AE_BUFFER_OVERFLOW) { 1095 if ((buf.Pointer = AcpiOsCallocate(buf.Length)) == NULL) { 1096 error = AE_NO_MEMORY; 1097 } else { 1098 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1099 p = (ACPI_OBJECT *)buf.Pointer; 1100 if (p->Type != ACPI_TYPE_BUFFER) { 1101 error = AE_TYPE; 1102 } else { 1103 if (p->Buffer.Length > sizeof(int)) { 1104 error = AE_BAD_DATA; 1105 } else { 1106 *number = 0; 1107 for (i = 0; i < p->Buffer.Length; i++) 1108 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1109 } 1110 } 1111 } 1112 } 1113 AcpiOsFree(buf.Pointer); 1114 } 1115 return(error); 1116} 1117 1118/* 1119 * Iterate over the elements of an a package object, calling the supplied 1120 * function for each element. 1121 * 1122 * XXX possible enhancement might be to abort traversal on error. 1123 */ 1124ACPI_STATUS 1125acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1126{ 1127 ACPI_OBJECT *comp; 1128 int i; 1129 1130 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1131 return(AE_BAD_PARAMETER); 1132 1133 /* iterate over components */ 1134 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1135 func(comp, arg); 1136 1137 return(AE_OK); 1138} 1139 1140/* 1141 * Find the (index)th resource object in a set. 1142 */ 1143ACPI_STATUS 1144acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1145{ 1146 ACPI_RESOURCE *rp; 1147 int i; 1148 1149 rp = (ACPI_RESOURCE *)buf->Pointer; 1150 i = index; 1151 while (i-- > 0) { 1152 /* range check */ 1153 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1154 return(AE_BAD_PARAMETER); 1155 /* check for terminator */ 1156 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1157 (rp->Length == 0)) 1158 return(AE_NOT_FOUND); 1159 rp = ACPI_RESOURCE_NEXT(rp); 1160 } 1161 if (resp != NULL) 1162 *resp = rp; 1163 return(AE_OK); 1164} 1165 1166/* 1167 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1168 * 1169 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1170 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1171 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1172 * resources. 1173 */ 1174#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1175 1176ACPI_STATUS 1177acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1178{ 1179 ACPI_RESOURCE *rp; 1180 void *newp; 1181 1182 /* 1183 * Initialise the buffer if necessary. 1184 */ 1185 if (buf->Pointer == NULL) { 1186 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1187 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1188 return(AE_NO_MEMORY); 1189 rp = (ACPI_RESOURCE *)buf->Pointer; 1190 rp->Id = ACPI_RSTYPE_END_TAG; 1191 rp->Length = 0; 1192 } 1193 if (res == NULL) 1194 return(AE_OK); 1195 1196 /* 1197 * Scan the current buffer looking for the terminator. 1198 * This will either find the terminator or hit the end 1199 * of the buffer and return an error. 1200 */ 1201 rp = (ACPI_RESOURCE *)buf->Pointer; 1202 for (;;) { 1203 /* range check, don't go outside the buffer */ 1204 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1205 return(AE_BAD_PARAMETER); 1206 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1207 (rp->Length == 0)) { 1208 break; 1209 } 1210 rp = ACPI_RESOURCE_NEXT(rp); 1211 } 1212 1213 /* 1214 * Check the size of the buffer and expand if required. 1215 * 1216 * Required size is: 1217 * size of existing resources before terminator + 1218 * size of new resource and header + 1219 * size of terminator. 1220 * 1221 * Note that this loop should really only run once, unless 1222 * for some reason we are stuffing a *really* huge resource. 1223 */ 1224 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1225 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1226 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1227 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1228 return(AE_NO_MEMORY); 1229 bcopy(buf->Pointer, newp, buf->Length); 1230 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1231 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1232 AcpiOsFree(buf->Pointer); 1233 buf->Pointer = newp; 1234 buf->Length += buf->Length; 1235 } 1236 1237 /* 1238 * Insert the new resource. 1239 */ 1240 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1241 1242 /* 1243 * And add the terminator. 1244 */ 1245 rp = ACPI_RESOURCE_NEXT(rp); 1246 rp->Id = ACPI_RSTYPE_END_TAG; 1247 rp->Length = 0; 1248 1249 return(AE_OK); 1250} 1251 1252 1253/* 1254 * Set the system sleep state 1255 * 1256 * Currently we only support S1 and S5 1257 */ 1258ACPI_STATUS 1259acpi_SetSleepState(struct acpi_softc *sc, int state) 1260{ 1261 ACPI_STATUS status = AE_OK; 1262 UINT16 Count; 1263 UINT8 TypeA; 1264 UINT8 TypeB; 1265 1266 FUNCTION_TRACE_U32(__func__, state); 1267 ACPI_ASSERTLOCK; 1268 1269 switch (state) { 1270 case ACPI_STATE_S0: /* XXX only for testing */ 1271 status = AcpiEnterSleepState((UINT8)state); 1272 if (status != AE_OK) { 1273 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1274 } 1275 break; 1276 1277 case ACPI_STATE_S1: 1278 case ACPI_STATE_S2: 1279 case ACPI_STATE_S3: 1280 case ACPI_STATE_S4: 1281 status = AcpiHwObtainSleepTypeRegisterData((UINT8)state, &TypeA, &TypeB); 1282 if (status != AE_OK) { 1283 device_printf(sc->acpi_dev, "AcpiHwObtainSleepTypeRegisterData failed - %s\n", AcpiFormatException(status)); 1284 break; 1285 } 1286 1287 /* 1288 * Inform all devices that we are going to sleep. 1289 */ 1290 if (DEVICE_SUSPEND(root_bus) != 0) { 1291 /* 1292 * Re-wake the system. 1293 * 1294 * XXX note that a better two-pass approach with a 'veto' pass 1295 * followed by a "real thing" pass would be better, but the 1296 * current bus interface does not provide for this. 1297 */ 1298 DEVICE_RESUME(root_bus); 1299 return_ACPI_STATUS(AE_ERROR); 1300 } 1301 sc->acpi_sstate = state; 1302 1303 if (state != ACPI_STATE_S1) { 1304 acpi_sleep_machdep(sc, state); 1305 1306 /* AcpiEnterSleepState() maybe incompleted, unlock here. */ 1307 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1308 1309 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1310 if (state >= ACPI_STATE_S4) { 1311 acpi_Disable(sc); 1312 acpi_Enable(sc); 1313 } 1314 } else { 1315 status = AcpiEnterSleepState((UINT8)state); 1316 if (status != AE_OK) { 1317 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1318 break; 1319 } 1320 /* wait for the WAK_STS bit */ 1321 Count = 0; 1322 while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) { 1323 AcpiOsSleep(0, 1); 1324 /* 1325 * Some BIOSes don't set WAK_STS at all, 1326 * give up waiting for wakeup if we time out. 1327 */ 1328 if (Count > 1000) { 1329 break; /* giving up */ 1330 } 1331 Count++; 1332 } 1333 } 1334 AcpiLeaveSleepState((UINT8)state); 1335 DEVICE_RESUME(root_bus); 1336 sc->acpi_sstate = ACPI_STATE_S0; 1337 acpi_enable_fixed_events(sc); 1338 break; 1339 1340 case ACPI_STATE_S5: 1341 /* 1342 * Shut down cleanly and power off. This will call us back through the 1343 * shutdown handlers. 1344 */ 1345 shutdown_nice(RB_POWEROFF); 1346 break; 1347 1348 default: 1349 status = AE_BAD_PARAMETER; 1350 break; 1351 } 1352 return_ACPI_STATUS(status); 1353} 1354 1355/* 1356 * Enable/Disable ACPI 1357 */ 1358ACPI_STATUS 1359acpi_Enable(struct acpi_softc *sc) 1360{ 1361 ACPI_STATUS status; 1362 u_int32_t flags; 1363 1364 FUNCTION_TRACE(__func__); 1365 ACPI_ASSERTLOCK; 1366 1367 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1368 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1369 if (!sc->acpi_enabled) { 1370 status = AcpiEnableSubsystem(flags); 1371 } else { 1372 status = AE_OK; 1373 } 1374 if (status == AE_OK) 1375 sc->acpi_enabled = 1; 1376 return_ACPI_STATUS(status); 1377} 1378 1379ACPI_STATUS 1380acpi_Disable(struct acpi_softc *sc) 1381{ 1382 ACPI_STATUS status; 1383 1384 FUNCTION_TRACE(__func__); 1385 ACPI_ASSERTLOCK; 1386 1387 if (sc->acpi_enabled) { 1388 status = AcpiDisable(); 1389 } else { 1390 status = AE_OK; 1391 } 1392 if (status == AE_OK) 1393 sc->acpi_enabled = 0; 1394 return_ACPI_STATUS(status); 1395} 1396 1397/* 1398 * ACPI Event Handlers 1399 */ 1400 1401/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1402 1403static void 1404acpi_system_eventhandler_sleep(void *arg, int state) 1405{ 1406 FUNCTION_TRACE_U32(__func__, state); 1407 1408 ACPI_LOCK; 1409 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1410 acpi_SetSleepState((struct acpi_softc *)arg, state); 1411 ACPI_UNLOCK; 1412 return_VOID; 1413} 1414 1415static void 1416acpi_system_eventhandler_wakeup(void *arg, int state) 1417{ 1418 FUNCTION_TRACE_U32(__func__, state); 1419 1420 /* Well, what to do? :-) */ 1421 1422 ACPI_LOCK; 1423 ACPI_UNLOCK; 1424 1425 return_VOID; 1426} 1427 1428/* 1429 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1430 */ 1431UINT32 1432acpi_eventhandler_power_button_for_sleep(void *context) 1433{ 1434 struct acpi_softc *sc = (struct acpi_softc *)context; 1435 1436 FUNCTION_TRACE(__func__); 1437 1438 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1439 1440 return_VALUE(INTERRUPT_HANDLED); 1441} 1442 1443UINT32 1444acpi_eventhandler_power_button_for_wakeup(void *context) 1445{ 1446 struct acpi_softc *sc = (struct acpi_softc *)context; 1447 1448 FUNCTION_TRACE(__func__); 1449 1450 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1451 1452 return_VALUE(INTERRUPT_HANDLED); 1453} 1454 1455UINT32 1456acpi_eventhandler_sleep_button_for_sleep(void *context) 1457{ 1458 struct acpi_softc *sc = (struct acpi_softc *)context; 1459 1460 FUNCTION_TRACE(__func__); 1461 1462 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1463 1464 return_VALUE(INTERRUPT_HANDLED); 1465} 1466 1467UINT32 1468acpi_eventhandler_sleep_button_for_wakeup(void *context) 1469{ 1470 struct acpi_softc *sc = (struct acpi_softc *)context; 1471 1472 FUNCTION_TRACE(__func__); 1473 1474 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1475 1476 return_VALUE(INTERRUPT_HANDLED); 1477} 1478 1479/* 1480 * XXX This is kinda ugly, and should not be here. 1481 */ 1482struct acpi_staticbuf { 1483 ACPI_BUFFER buffer; 1484 char data[512]; 1485}; 1486 1487char * 1488acpi_name(ACPI_HANDLE handle) 1489{ 1490 static struct acpi_staticbuf buf; 1491 1492 ACPI_ASSERTLOCK; 1493 1494 buf.buffer.Length = 512; 1495 buf.buffer.Pointer = &buf.data[0]; 1496 1497 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 1498 return(buf.buffer.Pointer); 1499 return("(unknown path)"); 1500} 1501 1502/* 1503 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1504 * parts of the namespace. 1505 */ 1506int 1507acpi_avoid(ACPI_HANDLE handle) 1508{ 1509 char *cp, *np; 1510 int len; 1511 1512 np = acpi_name(handle); 1513 if (*np == '\\') 1514 np++; 1515 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1516 return(0); 1517 1518 /* scan the avoid list checking for a match */ 1519 for (;;) { 1520 while ((*cp != 0) && isspace(*cp)) 1521 cp++; 1522 if (*cp == 0) 1523 break; 1524 len = 0; 1525 while ((cp[len] != 0) && !isspace(cp[len])) 1526 len++; 1527 if (!strncmp(cp, np, len)) 1528 return(1); 1529 cp += len; 1530 } 1531 return(0); 1532} 1533 1534/* 1535 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1536 */ 1537int 1538acpi_disabled(char *subsys) 1539{ 1540 char *cp; 1541 int len; 1542 1543 if ((cp = getenv("debug.acpi.disable")) == NULL) 1544 return(0); 1545 if (!strcmp(cp, "all")) 1546 return(1); 1547 1548 /* scan the disable list checking for a match */ 1549 for (;;) { 1550 while ((*cp != 0) && isspace(*cp)) 1551 cp++; 1552 if (*cp == 0) 1553 break; 1554 len = 0; 1555 while ((cp[len] != 0) && !isspace(cp[len])) 1556 len++; 1557 if (!strncmp(cp, subsys, len)) 1558 return(1); 1559 cp += len; 1560 } 1561 return(0); 1562} 1563 1564/* 1565 * Control interface. 1566 * 1567 * We multiplex ioctls for all participating ACPI devices here. Individual 1568 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1569 * interface to make their handlers visible. 1570 */ 1571struct acpi_ioctl_hook 1572{ 1573 TAILQ_ENTRY(acpi_ioctl_hook) link; 1574 u_long cmd; 1575 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1576 void *arg; 1577}; 1578 1579static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1580static int acpi_ioctl_hooks_initted; 1581 1582/* 1583 * Register an ioctl handler. 1584 */ 1585int 1586acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1587{ 1588 struct acpi_ioctl_hook *hp; 1589 1590 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1591 return(ENOMEM); 1592 hp->cmd = cmd; 1593 hp->fn = fn; 1594 hp->arg = arg; 1595 if (acpi_ioctl_hooks_initted == 0) { 1596 TAILQ_INIT(&acpi_ioctl_hooks); 1597 acpi_ioctl_hooks_initted = 1; 1598 } 1599 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1600 return(0); 1601} 1602 1603/* 1604 * Deregister an ioctl handler. 1605 */ 1606void 1607acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1608{ 1609 struct acpi_ioctl_hook *hp; 1610 1611 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1612 if ((hp->cmd == cmd) && (hp->fn == fn)) 1613 break; 1614 1615 if (hp != NULL) { 1616 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1617 free(hp, M_ACPIDEV); 1618 } 1619} 1620 1621static int 1622acpiopen(dev_t dev, int flag, int fmt, struct thread *td) 1623{ 1624 return(0); 1625} 1626 1627static int 1628acpiclose(dev_t dev, int flag, int fmt, struct thread *td) 1629{ 1630 return(0); 1631} 1632 1633static int 1634acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1635{ 1636 struct acpi_softc *sc; 1637 struct acpi_ioctl_hook *hp; 1638 int error, xerror, state; 1639 1640 ACPI_LOCK; 1641 1642 error = state = 0; 1643 sc = dev->si_drv1; 1644 1645 /* 1646 * Scan the list of registered ioctls, looking for handlers. 1647 */ 1648 if (acpi_ioctl_hooks_initted) { 1649 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1650 if (hp->cmd == cmd) { 1651 xerror = hp->fn(cmd, addr, hp->arg); 1652 if (xerror != 0) 1653 error = xerror; 1654 goto out; 1655 } 1656 } 1657 } 1658 1659 /* 1660 * Core system ioctls. 1661 */ 1662 switch (cmd) { 1663 case ACPIIO_ENABLE: 1664 if (ACPI_FAILURE(acpi_Enable(sc))) 1665 error = ENXIO; 1666 break; 1667 1668 case ACPIIO_DISABLE: 1669 if (ACPI_FAILURE(acpi_Disable(sc))) 1670 error = ENXIO; 1671 break; 1672 1673 case ACPIIO_SETSLPSTATE: 1674 if (!sc->acpi_enabled) { 1675 error = ENXIO; 1676 break; 1677 } 1678 state = *(int *)addr; 1679 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1680 acpi_SetSleepState(sc, state); 1681 } else { 1682 error = EINVAL; 1683 } 1684 break; 1685 1686 default: 1687 if (error == 0) 1688 error = EINVAL; 1689 break; 1690 } 1691 1692out: 1693 ACPI_UNLOCK; 1694 return(error); 1695} 1696 1697static int 1698acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1699{ 1700 char sleep_state[10]; 1701 int error; 1702 u_int new_state, old_state; 1703 1704 old_state = *(u_int *)oidp->oid_arg1; 1705 if (old_state > ACPI_S_STATES_MAX) { 1706 strcpy(sleep_state, "unknown"); 1707 } else { 1708 strncpy(sleep_state, sleep_state_names[old_state], 1709 sizeof(sleep_state_names[old_state])); 1710 } 1711 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1712 if (error == 0 && req->newptr != NULL) { 1713 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX; new_state++) { 1714 if (strncmp(sleep_state, sleep_state_names[new_state], 1715 sizeof(sleep_state)) == 0) 1716 break; 1717 } 1718 if ((new_state != old_state) && (new_state <= ACPI_S_STATES_MAX)) { 1719 *(u_int *)oidp->oid_arg1 = new_state; 1720 } else { 1721 error = EINVAL; 1722 } 1723 } 1724 return(error); 1725} 1726 1727#ifdef ACPI_DEBUG 1728/* 1729 * Support for parsing debug options from the kernel environment. 1730 * 1731 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1732 * by specifying the names of the bits in the debug.acpi.layer and 1733 * debug.acpi.level environment variables. Bits may be unset by 1734 * prefixing the bit name with !. 1735 */ 1736struct debugtag 1737{ 1738 char *name; 1739 UINT32 value; 1740}; 1741 1742static struct debugtag dbg_layer[] = { 1743 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1744 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1745 {"ACPI_EVENTS", ACPI_EVENTS}, 1746 {"ACPI_TABLES", ACPI_TABLES}, 1747 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 1748 {"ACPI_PARSER", ACPI_PARSER}, 1749 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 1750 {"ACPI_EXECUTER", ACPI_EXECUTER}, 1751 {"ACPI_RESOURCES", ACPI_RESOURCES}, 1752 {"ACPI_DEBUGGER", ACPI_DEBUGGER}, 1753 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 1754 1755 {"ACPI_BUS", ACPI_BUS}, 1756 {"ACPI_SYSTEM", ACPI_SYSTEM}, 1757 {"ACPI_POWER", ACPI_POWER}, 1758 {"ACPI_EC", ACPI_EC}, 1759 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 1760 {"ACPI_BATTERY", ACPI_BATTERY}, 1761 {"ACPI_BUTTON", ACPI_BUTTON}, 1762 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 1763 {"ACPI_THERMAL", ACPI_THERMAL}, 1764 {"ACPI_FAN", ACPI_FAN}, 1765 1766 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 1767 {NULL, 0} 1768}; 1769 1770static struct debugtag dbg_level[] = { 1771 {"ACPI_LV_OK", ACPI_LV_OK}, 1772 {"ACPI_LV_INFO", ACPI_LV_INFO}, 1773 {"ACPI_LV_WARN", ACPI_LV_WARN}, 1774 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 1775 {"ACPI_LV_FATAL", ACPI_LV_FATAL}, 1776 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 1777 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 1778 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 1779 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 1780 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 1781 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 1782 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 1783 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 1784 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 1785 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 1786 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 1787 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 1788 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 1789 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 1790 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 1791 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 1792 {"ACPI_LV_IO", ACPI_LV_IO}, 1793 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 1794 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 1795 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 1796 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 1797 {"ACPI_LV_INIT", ACPI_LV_INIT}, 1798 {"ACPI_LV_ALL", ACPI_LV_ALL}, 1799 {"ACPI_DB_AML_DISASSEMBLE", ACPI_DB_AML_DISASSEMBLE}, 1800 {"ACPI_DB_VERBOSE_INFO", ACPI_DB_VERBOSE_INFO}, 1801 {"ACPI_DB_FULL_TABLES", ACPI_DB_FULL_TABLES}, 1802 {"ACPI_DB_EVENTS", ACPI_DB_EVENTS}, 1803 {"ACPI_DB_VERBOSE", ACPI_DB_VERBOSE}, 1804 {NULL, 0} 1805}; 1806 1807static void 1808acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1809{ 1810 char *ep; 1811 int i, l; 1812 int set; 1813 1814 while (*cp) { 1815 if (isspace(*cp)) { 1816 cp++; 1817 continue; 1818 } 1819 ep = cp; 1820 while (*ep && !isspace(*ep)) 1821 ep++; 1822 if (*cp == '!') { 1823 set = 0; 1824 cp++; 1825 if (cp == ep) 1826 continue; 1827 } else { 1828 set = 1; 1829 } 1830 l = ep - cp; 1831 for (i = 0; tag[i].name != NULL; i++) { 1832 if (!strncmp(cp, tag[i].name, l)) { 1833 if (set) { 1834 *flag |= tag[i].value; 1835 } else { 1836 *flag &= ~tag[i].value; 1837 } 1838 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1839 } 1840 } 1841 cp = ep; 1842 } 1843} 1844 1845static void 1846acpi_set_debugging(void *junk) 1847{ 1848 char *cp; 1849 1850 AcpiDbgLayer = 0; 1851 AcpiDbgLevel = 0; 1852 if ((cp = getenv("debug.acpi.layer")) != NULL) 1853 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1854 if ((cp = getenv("debug.acpi.level")) != NULL) 1855 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1856 1857 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1858} 1859SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 1860#endif 1861