acpi.c revision 83169
1133094Ssimon/*- 2133094Ssimon * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3133094Ssimon * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4133094Ssimon * Copyright (c) 2000, 2001 Michael Smith 5133094Ssimon * Copyright (c) 2000 BSDi 6133094Ssimon * All rights reserved. 7133094Ssimon * 8133094Ssimon * Redistribution and use in source and binary forms, with or without 9133094Ssimon * modification, are permitted provided that the following conditions 10133094Ssimon * are met: 11133094Ssimon * 1. Redistributions of source code must retain the above copyright 12133094Ssimon * notice, this list of conditions and the following disclaimer. 13133094Ssimon * 2. Redistributions in binary form must reproduce the above copyright 14133094Ssimon * notice, this list of conditions and the following disclaimer in the 15133094Ssimon * documentation and/or other materials provided with the distribution. 16133094Ssimon * 17133094Ssimon * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18133094Ssimon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19133094Ssimon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20133094Ssimon * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21133094Ssimon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22133094Ssimon * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23133094Ssimon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24133094Ssimon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25133094Ssimon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26133094Ssimon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27133094Ssimon * SUCH DAMAGE. 28133094Ssimon * 29133094Ssimon * $FreeBSD: head/sys/dev/acpica/acpi.c 83169 2001-09-06 23:16:55Z jhb $ 30133094Ssimon */ 31133094Ssimon 32133094Ssimon#include "opt_acpi.h" 33133094Ssimon#include <sys/param.h> 34133094Ssimon#include <sys/kernel.h> 35133094Ssimon#include <sys/proc.h> 36133094Ssimon#include <sys/lock.h> 37133094Ssimon#include <sys/malloc.h> 38134652Sbrueffer#include <sys/mutex.h> 39133094Ssimon#include <sys/bus.h> 40133094Ssimon#include <sys/conf.h> 41133094Ssimon#include <sys/ioccom.h> 42133094Ssimon#include <sys/reboot.h> 43135126Sbrueffer#include <sys/sysctl.h> 44133094Ssimon#include <sys/ctype.h> 45133343Ssimon 46134264Ssimon#include <machine/clock.h> 47134401Ssimon#include <machine/resource.h> 48135126Sbrueffer 49133094Ssimon#include <isa/isavar.h> 50134316Sbrueffer 51133094Ssimon#include "acpi.h" 52139404Sbrueffer 53133343Ssimon#include <dev/acpica/acpivar.h> 54135126Sbrueffer#include <dev/acpica/acpiio.h> 55133094Ssimon 56135560SpeterMALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 57133094Ssimon 58133094Ssimon/* 59134826Ssimon * Hooks for the ACPI CA debugging infrastructure 60135126Sbrueffer */ 61133094Ssimon#define _COMPONENT ACPI_BUS 62135126SbruefferMODULE_NAME("ACPI") 63135126Sbrueffer 64135336Sbrueffer/* 65134786Sbrueffer * Character device 66135104Sbrueffer */ 67134786Sbrueffer 68134772Ssimonstatic d_open_t acpiopen; 69133094Ssimonstatic d_close_t acpiclose; 70135143Sbruefferstatic d_ioctl_t acpiioctl; 71133778Ssimon 72135120Ssimon#define CDEV_MAJOR 152 73137927Sbruefferstatic struct cdevsw acpi_cdevsw = { 74133343Ssimon acpiopen, 75134772Ssimon acpiclose, 76135126Sbrueffer noread, 77133343Ssimon nowrite, 78134218Sbrueffer acpiioctl, 79135126Sbrueffer nopoll, 80134273Sbrueffer nommap, 81135143Sbrueffer nostrategy, 82135126Sbrueffer "acpi", 83135126Sbrueffer CDEV_MAJOR, 84133094Ssimon nodump, 85134047Ssimon nopsize, 86133457Ssimon 0 87138967Sbrueffer}; 88135143Sbrueffer 89135081Sbruefferstatic const char* sleep_state_names[] = { 90133343Ssimon "S0", "S1", "S2", "S3", "S4", "S5", "S4B" }; 91133343Ssimon 92141288Sbrueffer/* this has to be static, as the softc is gone when we need it */ 93135143Sbruefferstatic int acpi_off_state = ACPI_STATE_S5; 94134316Sbrueffer 95135120Ssimonstruct mtx acpi_mutex; 96135126Sbrueffer 97135126Sbruefferstatic int acpi_modevent(struct module *mod, int event, void *junk); 98135126Sbruefferstatic void acpi_identify(driver_t *driver, device_t parent); 99138872Ssimonstatic int acpi_probe(device_t dev); 100134256Sbruefferstatic int acpi_attach(device_t dev); 101134786Sbruefferstatic device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 102134757Sbruefferstatic int acpi_print_resources(struct resource_list *rl, const char *name, int type, 103134414Ssimon const char *format); 104138846Ssimonstatic int acpi_print_child(device_t bus, device_t child); 105134414Ssimonstatic int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 106134414Ssimonstatic int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 107135082Ssimonstatic int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 108134414Ssimon u_long count); 109134414Ssimonstatic int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 110134414Ssimon u_long *countp); 111135533Ssimonstatic struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 112135082Ssimon u_long start, u_long end, u_long count, u_int flags); 113138133Ssimonstatic int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 114138850Ssimonstatic int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 115138850Ssimon 116142347Sbruefferstatic void acpi_probe_children(device_t bus); 117134414Ssimonstatic ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 118134673Sbrueffer 119133343Ssimonstatic void acpi_shutdown_pre_sync(void *arg, int howto); 120134701Sbruefferstatic void acpi_shutdown_final(void *arg, int howto); 121134701Sbrueffer 122133778Ssimonstatic void acpi_enable_fixed_events(struct acpi_softc *sc); 123134652Sbrueffer 124134652Sbruefferstatic void acpi_system_eventhandler_sleep(void *arg, int state); 125135126Sbruefferstatic void acpi_system_eventhandler_wakeup(void *arg, int state); 126134730Sbruefferstatic int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 127135120Ssimon 128135103Ssimonstatic device_method_t acpi_methods[] = { 129134864Sbrueffer /* Device interface */ 130133094Ssimon DEVMETHOD(device_identify, acpi_identify), 131134730Sbrueffer DEVMETHOD(device_probe, acpi_probe), 132134830Ssimon DEVMETHOD(device_attach, acpi_attach), 133135829Ssimon DEVMETHOD(device_shutdown, bus_generic_shutdown), 134138985Sbrueffer DEVMETHOD(device_suspend, bus_generic_suspend), 135134047Ssimon DEVMETHOD(device_resume, bus_generic_resume), 136134730Sbrueffer 137135829Ssimon /* Bus interface */ 138134047Ssimon DEVMETHOD(bus_add_child, acpi_add_child), 139135114Ssimon DEVMETHOD(bus_print_child, acpi_print_child), 140134876Sbrueffer DEVMETHOD(bus_read_ivar, acpi_read_ivar), 141135057Ssimon DEVMETHOD(bus_write_ivar, acpi_write_ivar), 142138872Ssimon DEVMETHOD(bus_set_resource, acpi_set_resource), 143133778Ssimon DEVMETHOD(bus_get_resource, acpi_get_resource), 144135126Sbrueffer DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 145134730Sbrueffer DEVMETHOD(bus_release_resource, acpi_release_resource), 146133094Ssimon DEVMETHOD(bus_driver_added, bus_generic_driver_added), 147 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 148 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 149 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 150 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 151 152 /* ISA emulation */ 153 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 154 155 {0, 0} 156}; 157 158static driver_t acpi_driver = { 159 "acpi", 160 acpi_methods, 161 sizeof(struct acpi_softc), 162}; 163 164devclass_t acpi_devclass; 165DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 166MODULE_VERSION(acpi, 100); 167 168SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 169SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 170static int acpi_ca_version = ACPI_CA_VERSION; 171SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 172 173/* 174 * ACPI can only be loaded as a module by the loader; activating it after 175 * system bootstrap time is not useful, and can be fatal to the system. 176 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 177 */ 178static int 179acpi_modevent(struct module *mod, int event, void *junk) 180{ 181 switch(event) { 182 case MOD_LOAD: 183 if (!cold) 184 return(EPERM); 185 break; 186 case MOD_UNLOAD: 187 return(EBUSY); 188 default: 189 break; 190 } 191 return(0); 192} 193 194/* 195 * Detect ACPI, perform early initialisation 196 */ 197static void 198acpi_identify(driver_t *driver, device_t parent) 199{ 200 device_t child; 201 int error; 202#ifdef ENABLE_DEBUGGER 203 char *debugpoint = getenv("debug.acpi.debugger"); 204#endif 205 206 FUNCTION_TRACE(__func__); 207 208 if(!cold){ 209 printf("Don't load this driver from userland!!\n"); 210 return ; 211 } 212 213 /* 214 * Make sure we're not being doubly invoked. 215 */ 216 if (device_find_child(parent, "acpi", 0) != NULL) 217 return_VOID; 218 219 /* initialise the ACPI mutex */ 220 mtx_init(&acpi_mutex, "ACPI global lock", MTX_DEF); 221 222 /* 223 * Start up the ACPI CA subsystem. 224 */ 225#ifdef ENABLE_DEBUGGER 226 if (debugpoint && !strcmp(debugpoint, "init")) 227 acpi_EnterDebugger(); 228#endif 229 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 230 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 231 return_VOID; 232 } 233#ifdef ENABLE_DEBUGGER 234 if (debugpoint && !strcmp(debugpoint, "tables")) 235 acpi_EnterDebugger(); 236#endif 237 if ((error = AcpiLoadTables()) != AE_OK) { 238 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 239 return_VOID; 240 } 241 242 /* 243 * Attach the actual ACPI device. 244 */ 245 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 246 device_printf(parent, "ACPI: could not attach\n"); 247 return_VOID; 248 } 249} 250 251/* 252 * Fetch some descriptive data from ACPI to put in our attach message 253 */ 254static int 255acpi_probe(device_t dev) 256{ 257 ACPI_TABLE_HEADER th; 258 char buf[20]; 259 ACPI_STATUS status; 260 int error; 261 262 FUNCTION_TRACE(__func__); 263 ACPI_LOCK; 264 265 if ((status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) { 266 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 267 error = ENXIO; 268 } else { 269 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 270 device_set_desc_copy(dev, buf); 271 error = 0; 272 } 273 ACPI_UNLOCK; 274 return_VALUE(error); 275} 276 277static int 278acpi_attach(device_t dev) 279{ 280 struct acpi_softc *sc; 281 ACPI_STATUS status; 282 int error; 283#ifdef ENABLE_DEBUGGER 284 char *debugpoint = getenv("debug.acpi.debugger"); 285#endif 286 287 FUNCTION_TRACE(__func__); 288 ACPI_LOCK; 289 sc = device_get_softc(dev); 290 bzero(sc, sizeof(*sc)); 291 sc->acpi_dev = dev; 292 293 acpi_install_wakeup_handler(sc); 294 295#ifdef ENABLE_DEBUGGER 296 if (debugpoint && !strcmp(debugpoint, "spaces")) 297 acpi_EnterDebugger(); 298#endif 299 300 /* 301 * Install the default address space handlers. 302 */ 303 error = ENXIO; 304 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 305 ACPI_ADR_SPACE_SYSTEM_MEMORY, 306 ACPI_DEFAULT_HANDLER, 307 NULL, NULL)) != AE_OK) { 308 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 309 goto out; 310 } 311 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 312 ACPI_ADR_SPACE_SYSTEM_IO, 313 ACPI_DEFAULT_HANDLER, 314 NULL, NULL)) != AE_OK) { 315 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 316 goto out; 317 } 318 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 319 ACPI_ADR_SPACE_PCI_CONFIG, 320 ACPI_DEFAULT_HANDLER, 321 NULL, NULL)) != AE_OK) { 322 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 323 goto out; 324 } 325 326 /* 327 * Bring ACPI fully online. 328 * 329 * Note that we request that device _STA and _INI methods not be run (ACPI_NO_DEVICE_INIT) 330 * and the final object initialisation pass be skipped (ACPI_NO_OBJECT_INIT). 331 * 332 * XXX We need to arrange for the object init pass after we have attached all our 333 * child devices. 334 */ 335#ifdef ENABLE_DEBUGGER 336 if (debugpoint && !strcmp(debugpoint, "enable")) 337 acpi_EnterDebugger(); 338#endif 339 if ((status = AcpiEnableSubsystem(ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT)) != AE_OK) { 340 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 341 goto out; 342 } 343 344 /* 345 * Setup our sysctl tree. 346 * 347 * XXX: This doesn't check to make sure that none of these fail. 348 */ 349 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 350 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 351 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 352 device_get_name(dev), CTLFLAG_RD, 0, ""); 353 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 354 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 355 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 356 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 357 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 358 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 359 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 360 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 361 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 362 363 /* 364 * Dispatch the default sleep state to devices. 365 * TBD: should be configured from userland policy manager. 366 */ 367 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 368 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 369 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 370 371 acpi_enable_fixed_events(sc); 372 373 /* 374 * Scan the namespace and attach/initialise children. 375 */ 376#ifdef ENABLE_DEBUGGER 377 if (debugpoint && !strcmp(debugpoint, "probe")) 378 acpi_EnterDebugger(); 379#endif 380 if (!acpi_disabled("bus")) 381 acpi_probe_children(dev); 382 383 /* 384 * Register our shutdown handlers 385 */ 386 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 387 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 388 389 /* 390 * Register our acpi event handlers. 391 * XXX should be configurable eg. via userland policy manager. 392 */ 393 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 394 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 395 396 /* 397 * Flag our initial states. 398 */ 399 sc->acpi_enabled = 1; 400 sc->acpi_sstate = ACPI_STATE_S0; 401 402 /* 403 * Create the control device 404 */ 405 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 406 sc->acpi_dev_t->si_drv1 = sc; 407 408#ifdef ENABLE_DEBUGGER 409 if (debugpoint && !strcmp(debugpoint, "running")) 410 acpi_EnterDebugger(); 411#endif 412 error = 0; 413 414 out: 415 ACPI_UNLOCK; 416 return_VALUE(error); 417} 418 419/* 420 * Handle a new device being added 421 */ 422static device_t 423acpi_add_child(device_t bus, int order, const char *name, int unit) 424{ 425 struct acpi_device *ad; 426 device_t child; 427 428 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 429 return(NULL); 430 bzero(ad, sizeof(*ad)); 431 432 resource_list_init(&ad->ad_rl); 433 434 child = device_add_child_ordered(bus, order, name, unit); 435 if (child != NULL) 436 device_set_ivars(child, ad); 437 return(child); 438} 439 440/* 441 * Print child device resource usage 442 */ 443static int 444acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 445{ 446 struct resource_list_entry *rle; 447 int printed, retval; 448 449 printed = 0; 450 retval = 0; 451 452 if (!SLIST_FIRST(rl)) 453 return(0); 454 455 /* Yes, this is kinda cheating */ 456 SLIST_FOREACH(rle, rl, link) { 457 if (rle->type == type) { 458 if (printed == 0) 459 retval += printf(" %s ", name); 460 else if (printed > 0) 461 retval += printf(","); 462 printed++; 463 retval += printf(format, rle->start); 464 if (rle->count > 1) { 465 retval += printf("-"); 466 retval += printf(format, rle->start + 467 rle->count - 1); 468 } 469 } 470 } 471 return(retval); 472} 473 474static int 475acpi_print_child(device_t bus, device_t child) 476{ 477 struct acpi_device *adev = device_get_ivars(child); 478 struct resource_list *rl = &adev->ad_rl; 479 int retval = 0; 480 481 retval += bus_print_child_header(bus, child); 482 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 483 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 484 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 485 retval += bus_print_child_footer(bus, child); 486 487 return(retval); 488} 489 490 491/* 492 * Handle per-device ivars 493 */ 494static int 495acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 496{ 497 struct acpi_device *ad; 498 499 if ((ad = device_get_ivars(child)) == NULL) { 500 printf("device has no ivars\n"); 501 return(ENOENT); 502 } 503 504 switch(index) { 505 /* ACPI ivars */ 506 case ACPI_IVAR_HANDLE: 507 *(ACPI_HANDLE *)result = ad->ad_handle; 508 break; 509 case ACPI_IVAR_MAGIC: 510 *(int *)result = ad->ad_magic; 511 break; 512 case ACPI_IVAR_PRIVATE: 513 *(void **)result = ad->ad_private; 514 break; 515 516 default: 517 panic("bad ivar read request (%d)\n", index); 518 return(ENOENT); 519 } 520 return(0); 521} 522 523static int 524acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 525{ 526 struct acpi_device *ad; 527 528 if ((ad = device_get_ivars(child)) == NULL) { 529 printf("device has no ivars\n"); 530 return(ENOENT); 531 } 532 533 switch(index) { 534 /* ACPI ivars */ 535 case ACPI_IVAR_HANDLE: 536 ad->ad_handle = (ACPI_HANDLE)value; 537 break; 538 case ACPI_IVAR_MAGIC: 539 ad->ad_magic = (int )value; 540 break; 541 case ACPI_IVAR_PRIVATE: 542 ad->ad_private = (void *)value; 543 break; 544 545 default: 546 panic("bad ivar write request (%d)\n", index); 547 return(ENOENT); 548 } 549 return(0); 550} 551 552/* 553 * Handle child resource allocation/removal 554 */ 555static int 556acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 557{ 558 struct acpi_device *ad = device_get_ivars(child); 559 struct resource_list *rl = &ad->ad_rl; 560 561 resource_list_add(rl, type, rid, start, start + count -1, count); 562 563 return(0); 564} 565 566static int 567acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 568{ 569 struct acpi_device *ad = device_get_ivars(child); 570 struct resource_list *rl = &ad->ad_rl; 571 struct resource_list_entry *rle; 572 573 rle = resource_list_find(rl, type, rid); 574 if (!rle) 575 return(ENOENT); 576 577 if (startp) 578 *startp = rle->start; 579 if (countp) 580 *countp = rle->count; 581 582 return(0); 583} 584 585static struct resource * 586acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 587 u_long start, u_long end, u_long count, u_int flags) 588{ 589 struct acpi_device *ad = device_get_ivars(child); 590 struct resource_list *rl = &ad->ad_rl; 591 592 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 593} 594 595static int 596acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 597{ 598 struct acpi_device *ad = device_get_ivars(child); 599 struct resource_list *rl = &ad->ad_rl; 600 601 return(resource_list_release(rl, bus, child, type, rid, r)); 602} 603 604/* 605 * Handle ISA-like devices probing for a PnP ID to match. 606 */ 607#define PNP_EISAID(s) \ 608 ((((s[0] - '@') & 0x1f) << 2) \ 609 | (((s[1] - '@') & 0x18) >> 3) \ 610 | (((s[1] - '@') & 0x07) << 13) \ 611 | (((s[2] - '@') & 0x1f) << 8) \ 612 | (PNP_HEXTONUM(s[4]) << 16) \ 613 | (PNP_HEXTONUM(s[3]) << 20) \ 614 | (PNP_HEXTONUM(s[6]) << 24) \ 615 | (PNP_HEXTONUM(s[5]) << 28)) 616 617int 618acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 619{ 620 ACPI_HANDLE h; 621 ACPI_DEVICE_INFO devinfo; 622 ACPI_STATUS error; 623 u_int32_t pnpid; 624 int result; 625 626 FUNCTION_TRACE(__func__); 627 628 /* 629 * ISA-style drivers attached to ACPI may persist and 630 * probe manually if we return ENOENT. We never want 631 * that to happen, so don't ever return it. 632 */ 633 result = ENXIO; 634 ACPI_LOCK; 635 636 /* fetch and validate the HID */ 637 if ((h = acpi_get_handle(child)) == NULL) 638 goto out; 639 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 640 goto out; 641 if (!(devinfo.Valid & ACPI_VALID_HID)) 642 goto out; 643 644 /* scan the supplied IDs for a match */ 645 pnpid = PNP_EISAID(devinfo.HardwareId); 646 while (ids && ids->ip_id) { 647 if (pnpid == ids->ip_id) { 648 result = 0; 649 goto out; 650 } 651 ids++; 652 } 653 out: 654 ACPI_UNLOCK; 655 return_VALUE(result); 656} 657 658/* 659 * Scan relevant portions of the ACPI namespace and attach child devices. 660 * 661 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 662 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 663 */ 664static void 665acpi_probe_children(device_t bus) 666{ 667 ACPI_HANDLE parent; 668 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 669 int i; 670 671 FUNCTION_TRACE(__func__); 672 ACPI_ASSERTLOCK; 673 674 /* 675 * Create any static children by calling device identify methods. 676 */ 677 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 678 bus_generic_probe(bus); 679 680 /* 681 * Scan the namespace and insert placeholders for all the devices that 682 * we find. 683 * 684 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 685 * we want to create nodes for all devices, not just those that are currently 686 * present. (This assumes that we don't want to create/remove devices as they 687 * appear, which might be smarter.) 688 */ 689 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 690 for (i = 0; scopes[i] != NULL; i++) 691 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 692 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 693 694 /* 695 * Scan all of the child devices we have created and let them probe/attach. 696 */ 697 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 698 bus_generic_attach(bus); 699 700 /* 701 * Some of these children may have attached others as part of their attach 702 * process (eg. the root PCI bus driver), so rescan. 703 */ 704 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 705 bus_generic_attach(bus); 706 707 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 708 return_VOID; 709} 710 711/* 712 * Evaluate a child device and determine whether we might attach a device to 713 * it. 714 */ 715static ACPI_STATUS 716acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 717{ 718 ACPI_OBJECT_TYPE type; 719 device_t child, bus = (device_t)context; 720 721 FUNCTION_TRACE(__func__); 722 723 /* 724 * Skip this device if we think we'll have trouble with it. 725 */ 726 if (acpi_avoid(handle)) 727 return_ACPI_STATUS(AE_OK); 728 729 if (AcpiGetType(handle, &type) == AE_OK) { 730 switch(type) { 731 case ACPI_TYPE_DEVICE: 732 case ACPI_TYPE_PROCESSOR: 733 case ACPI_TYPE_THERMAL: 734 case ACPI_TYPE_POWER: 735 if (acpi_disabled("children")) 736 break; 737 /* 738 * Create a placeholder device for this node. Sort the placeholder 739 * so that the probe/attach passes will run breadth-first. 740 */ 741 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 742 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 743 if (child == NULL) 744 break; 745 acpi_set_handle(child, handle); 746 747 /* 748 * Get the device's resource settings and attach them. 749 * Note that if the device has _PRS but no _CRS, we need 750 * to decide when it's appropriate to try to configure the 751 * device. Ignore the return value here; it's OK for the 752 * device not to have any resources. 753 */ 754 acpi_parse_resources(child, handle, &acpi_res_parse_set); 755 756 /* if we're debugging, probe/attach now rather than later */ 757 DEBUG_EXEC(device_probe_and_attach(child)); 758 break; 759 } 760 } 761 return_ACPI_STATUS(AE_OK); 762} 763 764static void 765acpi_shutdown_pre_sync(void *arg, int howto) 766{ 767 768 ACPI_ASSERTLOCK; 769 770 /* 771 * Disable all ACPI events before soft off, otherwise the system 772 * will be turned on again on some laptops. 773 * 774 * XXX this should probably be restricted to masking some events just 775 * before powering down, since we may still need ACPI during the 776 * shutdown process. 777 */ 778 acpi_Disable((struct acpi_softc *)arg); 779} 780 781static void 782acpi_shutdown_final(void *arg, int howto) 783{ 784 ACPI_STATUS status; 785 786 ACPI_ASSERTLOCK; 787 788 if (howto & RB_POWEROFF) { 789 printf("Power system off using ACPI...\n"); 790 if ((status = AcpiEnterSleepState(acpi_off_state)) != AE_OK) { 791 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 792 } else { 793 DELAY(1000000); 794 printf("ACPI power-off failed - timeout\n"); 795 } 796 } 797} 798 799static void 800acpi_enable_fixed_events(struct acpi_softc *sc) 801{ 802 static int first_time = 1; 803#define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 804 805 ACPI_ASSERTLOCK; 806 807 /* Enable and clear fixed events and install handlers. */ 808 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 809 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 810 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 811 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 812 acpi_eventhandler_power_button_for_sleep, sc); 813 if (first_time) { 814 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 815 } 816 } 817 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 818 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 819 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 820 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 821 acpi_eventhandler_sleep_button_for_sleep, sc); 822 if (first_time) { 823 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 824 } 825 } 826 827 first_time = 0; 828} 829 830/* 831 * Returns true if the device is actually present and should 832 * be attached to. This requires the present, enabled, UI-visible 833 * and diagnostics-passed bits to be set. 834 */ 835BOOLEAN 836acpi_DeviceIsPresent(device_t dev) 837{ 838 ACPI_HANDLE h; 839 ACPI_DEVICE_INFO devinfo; 840 ACPI_STATUS error; 841 842 ACPI_ASSERTLOCK; 843 844 if ((h = acpi_get_handle(dev)) == NULL) 845 return(FALSE); 846 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 847 return(FALSE); 848 /* XXX 0xf is probably not appropriate */ 849 if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) 850 return(TRUE); 851 return(FALSE); 852} 853 854/* 855 * Match a HID string against a device 856 */ 857BOOLEAN 858acpi_MatchHid(device_t dev, char *hid) 859{ 860 ACPI_HANDLE h; 861 ACPI_DEVICE_INFO devinfo; 862 ACPI_STATUS error; 863 864 ACPI_ASSERTLOCK; 865 866 if (hid == NULL) 867 return(FALSE); 868 if ((h = acpi_get_handle(dev)) == NULL) 869 return(FALSE); 870 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 871 return(FALSE); 872 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 873 return(TRUE); 874 return(FALSE); 875} 876 877/* 878 * Return the handle of a named object within our scope, ie. that of (parent) 879 * or one if its parents. 880 */ 881ACPI_STATUS 882acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 883{ 884 ACPI_HANDLE r; 885 ACPI_STATUS status; 886 887 ACPI_ASSERTLOCK; 888 889 /* walk back up the tree to the root */ 890 for (;;) { 891 status = AcpiGetHandle(parent, path, &r); 892 if (status == AE_OK) { 893 *result = r; 894 return(AE_OK); 895 } 896 if (status != AE_NOT_FOUND) 897 return(AE_OK); 898 if (AcpiGetParent(parent, &r) != AE_OK) 899 return(AE_NOT_FOUND); 900 parent = r; 901 } 902} 903 904/* 905 * Allocate a buffer with a preset data size. 906 */ 907ACPI_BUFFER * 908acpi_AllocBuffer(int size) 909{ 910 ACPI_BUFFER *buf; 911 912 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 913 return(NULL); 914 buf->Length = size; 915 buf->Pointer = (void *)(buf + 1); 916 return(buf); 917} 918 919/* 920 * Perform the tedious double-get procedure required for fetching something into 921 * an ACPI_BUFFER that has not been initialised. 922 */ 923ACPI_STATUS 924acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 925{ 926 ACPI_STATUS status; 927 928 ACPI_ASSERTLOCK; 929 930 buf->Length = 0; 931 buf->Pointer = NULL; 932 933 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 934 return(status); 935 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 936 return(AE_NO_MEMORY); 937 return(func(handle, buf)); 938} 939 940/* 941 * Perform the tedious double-get procedure required for fetching a table into 942 * an ACPI_BUFFER that has not been initialised. 943 */ 944ACPI_STATUS 945acpi_GetTableIntoBuffer(ACPI_TABLE_TYPE table, UINT32 instance, ACPI_BUFFER *buf) 946{ 947 ACPI_STATUS status; 948 949 ACPI_ASSERTLOCK; 950 951 buf->Length = 0; 952 buf->Pointer = NULL; 953 954 if ((status = AcpiGetTable(table, instance, buf)) != AE_BUFFER_OVERFLOW) 955 return(status); 956 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 957 return(AE_NO_MEMORY); 958 return(AcpiGetTable(table, instance, buf)); 959} 960 961/* 962 * Perform the tedious double-evaluate procedure for evaluating something into 963 * an ACPI_BUFFER that has not been initialised. Note that this evaluates 964 * twice, so avoid applying this to things that may have side-effects. 965 * 966 * This is like AcpiEvaluateObject with automatic buffer allocation. 967 */ 968ACPI_STATUS 969acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname, ACPI_OBJECT_LIST *params, 970 ACPI_BUFFER *buf) 971{ 972 ACPI_STATUS status; 973 974 ACPI_ASSERTLOCK; 975 976 buf->Length = 0; 977 buf->Pointer = NULL; 978 979 if ((status = AcpiEvaluateObject(object, pathname, params, buf)) != AE_BUFFER_OVERFLOW) 980 return(status); 981 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 982 return(AE_NO_MEMORY); 983 return(AcpiEvaluateObject(object, pathname, params, buf)); 984} 985 986/* 987 * Evaluate a path that should return an integer. 988 */ 989ACPI_STATUS 990acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 991{ 992 ACPI_STATUS error; 993 ACPI_BUFFER buf; 994 ACPI_OBJECT param, *p; 995 int i; 996 997 ACPI_ASSERTLOCK; 998 999 if (handle == NULL) 1000 handle = ACPI_ROOT_OBJECT; 1001 1002 /* 1003 * Assume that what we've been pointed at is an Integer object, or 1004 * a method that will return an Integer. 1005 */ 1006 buf.Pointer = ¶m; 1007 buf.Length = sizeof(param); 1008 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1009 if (param.Type == ACPI_TYPE_INTEGER) { 1010 *number = param.Integer.Value; 1011 } else { 1012 error = AE_TYPE; 1013 } 1014 } 1015 1016 /* 1017 * In some applications, a method that's expected to return an Integer 1018 * may instead return a Buffer (probably to simplify some internal 1019 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1020 * convert it into an Integer as best we can. 1021 * 1022 * This is a hack. 1023 */ 1024 if (error == AE_BUFFER_OVERFLOW) { 1025 if ((buf.Pointer = AcpiOsCallocate(buf.Length)) == NULL) { 1026 error = AE_NO_MEMORY; 1027 } else { 1028 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1029 p = (ACPI_OBJECT *)buf.Pointer; 1030 if (p->Type != ACPI_TYPE_BUFFER) { 1031 error = AE_TYPE; 1032 } else { 1033 if (p->Buffer.Length > sizeof(int)) { 1034 error = AE_BAD_DATA; 1035 } else { 1036 *number = 0; 1037 for (i = 0; i < p->Buffer.Length; i++) 1038 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1039 } 1040 } 1041 } 1042 } 1043 AcpiOsFree(buf.Pointer); 1044 } 1045 return(error); 1046} 1047 1048/* 1049 * Iterate over the elements of an a package object, calling the supplied 1050 * function for each element. 1051 * 1052 * XXX possible enhancement might be to abort traversal on error. 1053 */ 1054ACPI_STATUS 1055acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1056{ 1057 ACPI_OBJECT *comp; 1058 int i; 1059 1060 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1061 return(AE_BAD_PARAMETER); 1062 1063 /* iterate over components */ 1064 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1065 func(comp, arg); 1066 1067 return(AE_OK); 1068} 1069 1070/* 1071 * Find the (index)th resource object in a set. 1072 */ 1073ACPI_STATUS 1074acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1075{ 1076 ACPI_RESOURCE *rp; 1077 int i; 1078 1079 rp = (ACPI_RESOURCE *)buf->Pointer; 1080 i = index; 1081 while (i-- > 0) { 1082 /* range check */ 1083 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1084 return(AE_BAD_PARAMETER); 1085 /* check for terminator */ 1086 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1087 (rp->Length == 0)) 1088 return(AE_NOT_FOUND); 1089 rp = ACPI_RESOURCE_NEXT(rp); 1090 } 1091 if (resp != NULL) 1092 *resp = rp; 1093 return(AE_OK); 1094} 1095 1096/* 1097 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1098 * 1099 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1100 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1101 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1102 * resources. 1103 */ 1104#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1105 1106ACPI_STATUS 1107acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1108{ 1109 ACPI_RESOURCE *rp; 1110 void *newp; 1111 1112 /* 1113 * Initialise the buffer if necessary. 1114 */ 1115 if (buf->Pointer == NULL) { 1116 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1117 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1118 return(AE_NO_MEMORY); 1119 rp = (ACPI_RESOURCE *)buf->Pointer; 1120 rp->Id = ACPI_RSTYPE_END_TAG; 1121 rp->Length = 0; 1122 } 1123 if (res == NULL) 1124 return(AE_OK); 1125 1126 /* 1127 * Scan the current buffer looking for the terminator. 1128 * This will either find the terminator or hit the end 1129 * of the buffer and return an error. 1130 */ 1131 rp = (ACPI_RESOURCE *)buf->Pointer; 1132 for (;;) { 1133 /* range check, don't go outside the buffer */ 1134 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1135 return(AE_BAD_PARAMETER); 1136 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1137 (rp->Length == 0)) { 1138 break; 1139 } 1140 rp = ACPI_RESOURCE_NEXT(rp); 1141 } 1142 1143 /* 1144 * Check the size of the buffer and expand if required. 1145 * 1146 * Required size is: 1147 * size of existing resources before terminator + 1148 * size of new resource and header + 1149 * size of terminator. 1150 * 1151 * Note that this loop should really only run once, unless 1152 * for some reason we are stuffing a *really* huge resource. 1153 */ 1154 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1155 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1156 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1157 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1158 return(AE_NO_MEMORY); 1159 bcopy(buf->Pointer, newp, buf->Length); 1160 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1161 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1162 AcpiOsFree(buf->Pointer); 1163 buf->Pointer = newp; 1164 buf->Length += buf->Length; 1165 } 1166 1167 /* 1168 * Insert the new resource. 1169 */ 1170 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1171 1172 /* 1173 * And add the terminator. 1174 */ 1175 rp = ACPI_RESOURCE_NEXT(rp); 1176 rp->Id = ACPI_RSTYPE_END_TAG; 1177 rp->Length = 0; 1178 1179 return(AE_OK); 1180} 1181 1182 1183/* 1184 * Set the system sleep state 1185 * 1186 * Currently we only support S1 and S5 1187 */ 1188ACPI_STATUS 1189acpi_SetSleepState(struct acpi_softc *sc, int state) 1190{ 1191 ACPI_STATUS status = AE_OK; 1192 UINT16 Count; 1193 UINT8 TypeA; 1194 UINT8 TypeB; 1195 1196 FUNCTION_TRACE_U32(__func__, state); 1197 ACPI_ASSERTLOCK; 1198 1199 switch (state) { 1200 case ACPI_STATE_S0: /* XXX only for testing */ 1201 status = AcpiEnterSleepState((UINT8)state); 1202 if (status != AE_OK) { 1203 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1204 } 1205 break; 1206 1207 case ACPI_STATE_S1: 1208 case ACPI_STATE_S2: 1209 case ACPI_STATE_S3: 1210 case ACPI_STATE_S4: 1211 status = AcpiHwObtainSleepTypeRegisterData((UINT8)state, &TypeA, &TypeB); 1212 if (status != AE_OK) { 1213 device_printf(sc->acpi_dev, "AcpiHwObtainSleepTypeRegisterData failed - %s\n", AcpiFormatException(status)); 1214 break; 1215 } 1216 1217 /* 1218 * Inform all devices that we are going to sleep. 1219 */ 1220 if (DEVICE_SUSPEND(root_bus) != 0) { 1221 /* 1222 * Re-wake the system. 1223 * 1224 * XXX note that a better two-pass approach with a 'veto' pass 1225 * followed by a "real thing" pass would be better, but the 1226 * current bus interface does not provide for this. 1227 */ 1228 DEVICE_RESUME(root_bus); 1229 return_ACPI_STATUS(AE_ERROR); 1230 } 1231 sc->acpi_sstate = state; 1232 1233 if (state != ACPI_STATE_S1) { 1234 acpi_sleep_machdep(sc, state); 1235 1236 /* AcpiEnterSleepState() maybe incompleted, unlock here. */ 1237 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1238 1239 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1240 if (state >= ACPI_STATE_S4) { 1241 acpi_Disable(sc); 1242 acpi_Enable(sc); 1243 } 1244 } else { 1245 status = AcpiEnterSleepState((UINT8)state); 1246 if (status != AE_OK) { 1247 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1248 break; 1249 } 1250 /* wait for the WAK_STS bit */ 1251 Count = 0; 1252 while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) { 1253 AcpiOsSleep(0, 1); 1254 /* 1255 * Some BIOSes don't set WAK_STS at all, 1256 * give up waiting for wakeup if we time out. 1257 */ 1258 if (Count > 1000) { 1259 break; /* giving up */ 1260 } 1261 Count++; 1262 } 1263 } 1264 AcpiLeaveSleepState((UINT8)state); 1265 DEVICE_RESUME(root_bus); 1266 sc->acpi_sstate = ACPI_STATE_S0; 1267 acpi_enable_fixed_events(sc); 1268 break; 1269 1270 case ACPI_STATE_S5: 1271 /* 1272 * Shut down cleanly and power off. This will call us back through the 1273 * shutdown handlers. 1274 */ 1275 shutdown_nice(RB_POWEROFF); 1276 break; 1277 1278 default: 1279 status = AE_BAD_PARAMETER; 1280 break; 1281 } 1282 return_ACPI_STATUS(status); 1283} 1284 1285/* 1286 * Enable/Disable ACPI 1287 */ 1288ACPI_STATUS 1289acpi_Enable(struct acpi_softc *sc) 1290{ 1291 ACPI_STATUS status; 1292 u_int32_t flags; 1293 1294 FUNCTION_TRACE(__func__); 1295 ACPI_ASSERTLOCK; 1296 1297 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1298 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1299 if (!sc->acpi_enabled) { 1300 status = AcpiEnableSubsystem(flags); 1301 } else { 1302 status = AE_OK; 1303 } 1304 if (status == AE_OK) 1305 sc->acpi_enabled = 1; 1306 return_ACPI_STATUS(status); 1307} 1308 1309ACPI_STATUS 1310acpi_Disable(struct acpi_softc *sc) 1311{ 1312 ACPI_STATUS status; 1313 1314 FUNCTION_TRACE(__func__); 1315 ACPI_ASSERTLOCK; 1316 1317 if (sc->acpi_enabled) { 1318 status = AcpiDisable(); 1319 } else { 1320 status = AE_OK; 1321 } 1322 if (status == AE_OK) 1323 sc->acpi_enabled = 0; 1324 return_ACPI_STATUS(status); 1325} 1326 1327/* 1328 * ACPI Event Handlers 1329 */ 1330 1331/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1332 1333static void 1334acpi_system_eventhandler_sleep(void *arg, int state) 1335{ 1336 FUNCTION_TRACE_U32(__func__, state); 1337 1338 ACPI_LOCK; 1339 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1340 acpi_SetSleepState((struct acpi_softc *)arg, state); 1341 ACPI_UNLOCK; 1342 return_VOID; 1343} 1344 1345static void 1346acpi_system_eventhandler_wakeup(void *arg, int state) 1347{ 1348 FUNCTION_TRACE_U32(__func__, state); 1349 1350 /* Well, what to do? :-) */ 1351 1352 ACPI_LOCK; 1353 ACPI_UNLOCK; 1354 1355 return_VOID; 1356} 1357 1358/* 1359 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1360 */ 1361UINT32 1362acpi_eventhandler_power_button_for_sleep(void *context) 1363{ 1364 struct acpi_softc *sc = (struct acpi_softc *)context; 1365 1366 FUNCTION_TRACE(__func__); 1367 1368 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1369 1370 return_VALUE(INTERRUPT_HANDLED); 1371} 1372 1373UINT32 1374acpi_eventhandler_power_button_for_wakeup(void *context) 1375{ 1376 struct acpi_softc *sc = (struct acpi_softc *)context; 1377 1378 FUNCTION_TRACE(__func__); 1379 1380 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1381 1382 return_VALUE(INTERRUPT_HANDLED); 1383} 1384 1385UINT32 1386acpi_eventhandler_sleep_button_for_sleep(void *context) 1387{ 1388 struct acpi_softc *sc = (struct acpi_softc *)context; 1389 1390 FUNCTION_TRACE(__func__); 1391 1392 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1393 1394 return_VALUE(INTERRUPT_HANDLED); 1395} 1396 1397UINT32 1398acpi_eventhandler_sleep_button_for_wakeup(void *context) 1399{ 1400 struct acpi_softc *sc = (struct acpi_softc *)context; 1401 1402 FUNCTION_TRACE(__func__); 1403 1404 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1405 1406 return_VALUE(INTERRUPT_HANDLED); 1407} 1408 1409/* 1410 * XXX This is kinda ugly, and should not be here. 1411 */ 1412struct acpi_staticbuf { 1413 ACPI_BUFFER buffer; 1414 char data[512]; 1415}; 1416 1417char * 1418acpi_name(ACPI_HANDLE handle) 1419{ 1420 static struct acpi_staticbuf buf; 1421 1422 ACPI_ASSERTLOCK; 1423 1424 buf.buffer.Length = 512; 1425 buf.buffer.Pointer = &buf.data[0]; 1426 1427 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 1428 return(buf.buffer.Pointer); 1429 return("(unknown path)"); 1430} 1431 1432/* 1433 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1434 * parts of the namespace. 1435 */ 1436int 1437acpi_avoid(ACPI_HANDLE handle) 1438{ 1439 char *cp, *np; 1440 int len; 1441 1442 np = acpi_name(handle); 1443 if (*np == '\\') 1444 np++; 1445 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1446 return(0); 1447 1448 /* scan the avoid list checking for a match */ 1449 for (;;) { 1450 while ((*cp != 0) && isspace(*cp)) 1451 cp++; 1452 if (*cp == 0) 1453 break; 1454 len = 0; 1455 while ((cp[len] != 0) && !isspace(cp[len])) 1456 len++; 1457 if (!strncmp(cp, np, len)) 1458 return(1); 1459 cp += len; 1460 } 1461 return(0); 1462} 1463 1464/* 1465 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1466 */ 1467int 1468acpi_disabled(char *subsys) 1469{ 1470 char *cp; 1471 int len; 1472 1473 if ((cp = getenv("debug.acpi.disable")) == NULL) 1474 return(0); 1475 if (!strcmp(cp, "all")) 1476 return(1); 1477 1478 /* scan the disable list checking for a match */ 1479 for (;;) { 1480 while ((*cp != 0) && isspace(*cp)) 1481 cp++; 1482 if (*cp == 0) 1483 break; 1484 len = 0; 1485 while ((cp[len] != 0) && !isspace(cp[len])) 1486 len++; 1487 if (!strncmp(cp, subsys, len)) 1488 return(1); 1489 cp += len; 1490 } 1491 return(0); 1492} 1493 1494/* 1495 * Control interface. 1496 * 1497 * We multiplex ioctls for all participating ACPI devices here. Individual 1498 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1499 * interface to make their handlers visible. 1500 */ 1501struct acpi_ioctl_hook 1502{ 1503 TAILQ_ENTRY(acpi_ioctl_hook) link; 1504 u_long cmd; 1505 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1506 void *arg; 1507}; 1508 1509static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1510static int acpi_ioctl_hooks_initted; 1511 1512/* 1513 * Register an ioctl handler. 1514 */ 1515int 1516acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1517{ 1518 struct acpi_ioctl_hook *hp; 1519 1520 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1521 return(ENOMEM); 1522 hp->cmd = cmd; 1523 hp->fn = fn; 1524 hp->arg = arg; 1525 if (acpi_ioctl_hooks_initted == 0) { 1526 TAILQ_INIT(&acpi_ioctl_hooks); 1527 acpi_ioctl_hooks_initted = 1; 1528 } 1529 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1530 return(0); 1531} 1532 1533/* 1534 * Deregister an ioctl handler. 1535 */ 1536void 1537acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1538{ 1539 struct acpi_ioctl_hook *hp; 1540 1541 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1542 if ((hp->cmd == cmd) && (hp->fn == fn)) 1543 break; 1544 1545 if (hp != NULL) { 1546 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1547 free(hp, M_ACPIDEV); 1548 } 1549} 1550 1551static int 1552acpiopen(dev_t dev, int flag, int fmt, struct proc *p) 1553{ 1554 return(0); 1555} 1556 1557static int 1558acpiclose(dev_t dev, int flag, int fmt, struct proc *p) 1559{ 1560 return(0); 1561} 1562 1563static int 1564acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1565{ 1566 struct acpi_softc *sc; 1567 struct acpi_ioctl_hook *hp; 1568 int error, xerror, state; 1569 1570 ACPI_LOCK; 1571 1572 error = state = 0; 1573 sc = dev->si_drv1; 1574 1575 /* 1576 * Scan the list of registered ioctls, looking for handlers. 1577 */ 1578 if (acpi_ioctl_hooks_initted) { 1579 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1580 if (hp->cmd == cmd) { 1581 xerror = hp->fn(cmd, addr, hp->arg); 1582 if (xerror != 0) 1583 error = xerror; 1584 goto out; 1585 } 1586 } 1587 } 1588 1589 /* 1590 * Core system ioctls. 1591 */ 1592 switch (cmd) { 1593 case ACPIIO_ENABLE: 1594 if (ACPI_FAILURE(acpi_Enable(sc))) 1595 error = ENXIO; 1596 break; 1597 1598 case ACPIIO_DISABLE: 1599 if (ACPI_FAILURE(acpi_Disable(sc))) 1600 error = ENXIO; 1601 break; 1602 1603 case ACPIIO_SETSLPSTATE: 1604 if (!sc->acpi_enabled) { 1605 error = ENXIO; 1606 break; 1607 } 1608 state = *(int *)addr; 1609 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1610 acpi_SetSleepState(sc, state); 1611 } else { 1612 error = EINVAL; 1613 } 1614 break; 1615 1616 default: 1617 if (error == 0) 1618 error = EINVAL; 1619 break; 1620 } 1621 1622out: 1623 ACPI_UNLOCK; 1624 return(error); 1625} 1626 1627static int 1628acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1629{ 1630 char sleep_state[10]; 1631 int error; 1632 u_int new_state, old_state; 1633 1634 old_state = *(u_int *)oidp->oid_arg1; 1635 if (old_state > ACPI_S_STATES_MAX) { 1636 strcpy(sleep_state, "unknown"); 1637 } else { 1638 strncpy(sleep_state, sleep_state_names[old_state], 1639 sizeof(sleep_state_names[old_state])); 1640 } 1641 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1642 if (error == 0 && req->newptr != NULL) { 1643 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX; new_state++) { 1644 if (strncmp(sleep_state, sleep_state_names[new_state], 1645 sizeof(sleep_state)) == 0) 1646 break; 1647 } 1648 if ((new_state != old_state) && (new_state <= ACPI_S_STATES_MAX)) { 1649 *(u_int *)oidp->oid_arg1 = new_state; 1650 } else { 1651 error = EINVAL; 1652 } 1653 } 1654 return(error); 1655} 1656 1657#ifdef ACPI_DEBUG 1658/* 1659 * Support for parsing debug options from the kernel environment. 1660 * 1661 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1662 * by specifying the names of the bits in the debug.acpi.layer and 1663 * debug.acpi.level environment variables. Bits may be unset by 1664 * prefixing the bit name with !. 1665 */ 1666struct debugtag 1667{ 1668 char *name; 1669 UINT32 value; 1670}; 1671 1672static struct debugtag dbg_layer[] = { 1673 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1674 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1675 {"ACPI_EVENTS", ACPI_EVENTS}, 1676 {"ACPI_TABLES", ACPI_TABLES}, 1677 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 1678 {"ACPI_PARSER", ACPI_PARSER}, 1679 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 1680 {"ACPI_EXECUTER", ACPI_EXECUTER}, 1681 {"ACPI_RESOURCES", ACPI_RESOURCES}, 1682 {"ACPI_DEBUGGER", ACPI_DEBUGGER}, 1683 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 1684 1685 {"ACPI_BUS", ACPI_BUS}, 1686 {"ACPI_SYSTEM", ACPI_SYSTEM}, 1687 {"ACPI_POWER", ACPI_POWER}, 1688 {"ACPI_EC", ACPI_EC}, 1689 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 1690 {"ACPI_BATTERY", ACPI_BATTERY}, 1691 {"ACPI_BUTTON", ACPI_BUTTON}, 1692 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 1693 {"ACPI_THERMAL", ACPI_THERMAL}, 1694 {"ACPI_FAN", ACPI_FAN}, 1695 1696 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 1697 {NULL, 0} 1698}; 1699 1700static struct debugtag dbg_level[] = { 1701 {"ACPI_LV_OK", ACPI_LV_OK}, 1702 {"ACPI_LV_INFO", ACPI_LV_INFO}, 1703 {"ACPI_LV_WARN", ACPI_LV_WARN}, 1704 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 1705 {"ACPI_LV_FATAL", ACPI_LV_FATAL}, 1706 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 1707 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 1708 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 1709 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 1710 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 1711 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 1712 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 1713 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 1714 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 1715 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 1716 {"ACPI_LV_TRASH", ACPI_LV_TRASH}, 1717 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 1718 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 1719 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 1720 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 1721 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 1722 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 1723 {"ACPI_LV_IO", ACPI_LV_IO}, 1724 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 1725 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 1726 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 1727 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 1728 {"ACPI_LV_INIT", ACPI_LV_INIT}, 1729 {"ACPI_LV_ALL", ACPI_LV_ALL}, 1730 {"ACPI_DB_AML_DISASSEMBLE", ACPI_DB_AML_DISASSEMBLE}, 1731 {"ACPI_DB_VERBOSE_INFO", ACPI_DB_VERBOSE_INFO}, 1732 {"ACPI_DB_FULL_TABLES", ACPI_DB_FULL_TABLES}, 1733 {"ACPI_DB_EVENTS", ACPI_DB_EVENTS}, 1734 {"ACPI_DB_VERBOSE", ACPI_DB_VERBOSE}, 1735 {NULL, 0} 1736}; 1737 1738static void 1739acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1740{ 1741 char *ep; 1742 int i, l; 1743 int set; 1744 1745 while (*cp) { 1746 if (isspace(*cp)) { 1747 cp++; 1748 continue; 1749 } 1750 ep = cp; 1751 while (*ep && !isspace(*ep)) 1752 ep++; 1753 if (*cp == '!') { 1754 set = 0; 1755 cp++; 1756 if (cp == ep) 1757 continue; 1758 } else { 1759 set = 1; 1760 } 1761 l = ep - cp; 1762 for (i = 0; tag[i].name != NULL; i++) { 1763 if (!strncmp(cp, tag[i].name, l)) { 1764 if (set) { 1765 *flag |= tag[i].value; 1766 } else { 1767 *flag &= ~tag[i].value; 1768 } 1769 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1770 } 1771 } 1772 cp = ep; 1773 } 1774} 1775 1776static void 1777acpi_set_debugging(void *junk) 1778{ 1779 char *cp; 1780 1781 AcpiDbgLayer = 0; 1782 AcpiDbgLevel = 0; 1783 if ((cp = getenv("debug.acpi.layer")) != NULL) 1784 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1785 if ((cp = getenv("debug.acpi.level")) != NULL) 1786 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1787 1788 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1789} 1790SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 1791#endif 1792