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 * $FreeBSD$ 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/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/ioccom.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 47 #include <machine/clock.h> 48 #include <machine/resource.h> 49 50 #include <isa/isavar.h> 51 52 #include "acpi.h" 53 54 #include <dev/acpica/acpica_support.h> 55 56 #include <dev/acpica/acpivar.h> 57 #include <dev/acpica/acpiio.h> 58 59 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 60 61 /* 62 * Hooks for the ACPI CA debugging infrastructure 63 */ 64 #define _COMPONENT ACPI_BUS 65 ACPI_MODULE_NAME("ACPI") 66 67 /* 68 * Character device 69 */ 70 71 static d_open_t acpiopen; 72 static d_close_t acpiclose; 73 static d_ioctl_t acpiioctl; 74 75 #define CDEV_MAJOR 152 76 static struct cdevsw acpi_cdevsw = { 77 .d_open = acpiopen, 78 .d_close = acpiclose, 79 .d_ioctl = acpiioctl, 80 .d_name = "acpi", 81 .d_maj = CDEV_MAJOR, 82 }; 83 84 static const char* sleep_state_names[] = { 85 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 86 87 /* this has to be static, as the softc is gone when we need it */ 88 static int acpi_off_state = ACPI_STATE_S5; 89 90 #if __FreeBSD_version >= 500000 91 struct mtx acpi_mutex; 92 #endif 93 94 static int acpi_modevent(struct module *mod, int event, void *junk); 95 static void acpi_identify(driver_t *driver, device_t parent); 96 static int acpi_probe(device_t dev); 97 static int acpi_attach(device_t dev); 98 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 99 static int acpi_print_child(device_t bus, device_t child); 100 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 101 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 102 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 103 u_long count); 104 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 105 u_long *countp); 106 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 107 u_long start, u_long end, u_long count, u_int flags); 108 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 109 static u_int32_t acpi_isa_get_logicalid(device_t dev); 110 static u_int32_t acpi_isa_get_compatid(device_t dev); 111 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 112 113 static void acpi_probe_children(device_t bus); 114 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 115 116 static void acpi_shutdown_pre_sync(void *arg, int howto); 117 static void acpi_shutdown_final(void *arg, int howto); 118 119 static void acpi_enable_fixed_events(struct acpi_softc *sc); 120 121 static void acpi_system_eventhandler_sleep(void *arg, int state); 122 static void acpi_system_eventhandler_wakeup(void *arg, int state); 123 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 124 125 static int acpi_pm_func(u_long cmd, void *arg, ...); 126 127 static device_method_t acpi_methods[] = { 128 /* Device interface */ 129 DEVMETHOD(device_identify, acpi_identify), 130 DEVMETHOD(device_probe, acpi_probe), 131 DEVMETHOD(device_attach, acpi_attach), 132 DEVMETHOD(device_shutdown, bus_generic_shutdown), 133 DEVMETHOD(device_suspend, bus_generic_suspend), 134 DEVMETHOD(device_resume, bus_generic_resume), 135 136 /* Bus interface */ 137 DEVMETHOD(bus_add_child, acpi_add_child), 138 DEVMETHOD(bus_print_child, acpi_print_child), 139 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 140 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 141 DEVMETHOD(bus_set_resource, acpi_set_resource), 142 DEVMETHOD(bus_get_resource, acpi_get_resource), 143 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 144 DEVMETHOD(bus_release_resource, acpi_release_resource), 145 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 146 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 147 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 148 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 149 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 150 151 /* ISA emulation */ 152 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 153 154 {0, 0} 155 }; 156 157 static driver_t acpi_driver = { 158 "acpi", 159 acpi_methods, 160 sizeof(struct acpi_softc), 161 }; 162 163 static devclass_t acpi_devclass; 164 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 165 MODULE_VERSION(acpi, 100); 166 167 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 168 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 169 static int acpi_ca_version = ACPI_CA_VERSION; 170 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 171 172 /* 173 * ACPI can only be loaded as a module by the loader; activating it after 174 * system bootstrap time is not useful, and can be fatal to the system. 175 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 176 */ 177 static int 178 acpi_modevent(struct module *mod, int event, void *junk) 179 { 180 switch(event) { 181 case MOD_LOAD: 182 if (!cold) { 183 printf("The ACPI driver cannot be loaded after boot.\n"); 184 return(EPERM); 185 } 186 break; 187 case MOD_UNLOAD: 188 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 189 return(EBUSY); 190 break; 191 default: 192 break; 193 } 194 return(0); 195 } 196 197 /* 198 * Detect ACPI, perform early initialisation 199 */ 200 static void 201 acpi_identify(driver_t *driver, device_t parent) 202 { 203 device_t child; 204 int error; 205 #ifdef ACPI_DEBUGGER 206 char *debugpoint; 207 #endif 208 209 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 210 211 if (!cold) 212 return_VOID; 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 #if __FreeBSD_version >= 500000 228 /* initialise the ACPI mutex */ 229 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 230 #endif 231 232 /* 233 * Start up the ACPI CA subsystem. 234 */ 235 #ifdef ACPI_DEBUGGER 236 debugpoint = getenv("debug.acpi.debugger"); 237 if (debugpoint) { 238 if (!strcmp(debugpoint, "init")) 239 acpi_EnterDebugger(); 240 freeenv(debugpoint); 241 } 242 #endif 243 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 244 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 245 return_VOID; 246 } 247 #ifdef ACPI_DEBUGGER 248 debugpoint = getenv("debug.acpi.debugger"); 249 if (debugpoint) { 250 if (!strcmp(debugpoint, "tables")) 251 acpi_EnterDebugger(); 252 freeenv(debugpoint); 253 } 254 #endif 255 256 if (ACPI_FAILURE(error = AcpiLoadTables())) { 257 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 258 return_VOID; 259 } 260 261 /* 262 * Attach the actual ACPI device. 263 */ 264 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 265 device_printf(parent, "ACPI: could not attach\n"); 266 return_VOID; 267 } 268 } 269 270 /* 271 * Fetch some descriptive data from ACPI to put in our attach message 272 */ 273 static int 274 acpi_probe(device_t dev) 275 { 276 ACPI_TABLE_HEADER th; 277 char buf[20]; 278 ACPI_STATUS status; 279 int error; 280 ACPI_LOCK_DECL; 281 282 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 283 284 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 285 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 286 device_printf(dev, "Other PM system enabled.\n"); 287 return_VALUE(ENXIO); 288 } 289 290 ACPI_LOCK; 291 292 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 293 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 294 error = ENXIO; 295 } else { 296 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 297 device_set_desc_copy(dev, buf); 298 error = 0; 299 } 300 ACPI_UNLOCK; 301 return_VALUE(error); 302 } 303 304 static int 305 acpi_attach(device_t dev) 306 { 307 struct acpi_softc *sc; 308 ACPI_STATUS status; 309 int error; 310 UINT32 flags; 311 char *env; 312 #ifdef ACPI_DEBUGGER 313 char *debugpoint; 314 #endif 315 ACPI_LOCK_DECL; 316 317 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 318 ACPI_LOCK; 319 sc = device_get_softc(dev); 320 bzero(sc, sizeof(*sc)); 321 sc->acpi_dev = dev; 322 323 #ifdef ACPI_DEBUGGER 324 debugpoint = getenv("debug.acpi.debugger"); 325 if (debugpoint) { 326 if (!strcmp(debugpoint, "spaces")) 327 acpi_EnterDebugger(); 328 freeenv(debugpoint); 329 } 330 #endif 331 332 /* 333 * Install the default address space handlers. 334 */ 335 error = ENXIO; 336 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 337 ACPI_ADR_SPACE_SYSTEM_MEMORY, 338 ACPI_DEFAULT_HANDLER, 339 NULL, NULL))) { 340 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 341 goto out; 342 } 343 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 344 ACPI_ADR_SPACE_SYSTEM_IO, 345 ACPI_DEFAULT_HANDLER, 346 NULL, NULL))) { 347 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 348 goto out; 349 } 350 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 351 ACPI_ADR_SPACE_PCI_CONFIG, 352 ACPI_DEFAULT_HANDLER, 353 NULL, NULL))) { 354 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 355 goto out; 356 } 357 358 /* 359 * Bring ACPI fully online. 360 * 361 * Note that some systems (specifically, those with namespace evaluation issues 362 * that require the avoidance of parts of the namespace) must avoid running _INI 363 * and _STA on everything, as well as dodging the final object init pass. 364 * 365 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 366 * 367 * XXX We should arrange for the object init pass after we have attached all our 368 * child devices, but on many systems it works here. 369 */ 370 #ifdef ACPI_DEBUGGER 371 debugpoint = getenv("debug.acpi.debugger"); 372 if (debugpoint) { 373 if (!strcmp(debugpoint, "enable")) 374 acpi_EnterDebugger(); 375 freeenv(debugpoint); 376 } 377 #endif 378 flags = 0; 379 if (testenv("debug.acpi.avoid")) 380 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 381 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 382 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 383 goto out; 384 } 385 386 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 387 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status)); 388 goto out; 389 } 390 391 /* 392 * Setup our sysctl tree. 393 * 394 * XXX: This doesn't check to make sure that none of these fail. 395 */ 396 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 397 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 398 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 399 device_get_name(dev), CTLFLAG_RD, 0, ""); 400 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 401 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 402 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 403 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 404 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 405 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 406 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 407 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 408 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 409 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 410 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 411 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 412 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 413 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 414 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 415 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 416 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 417 &sc->acpi_sleep_delay, 0, "sleep delay"); 418 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 419 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 420 &sc->acpi_s4bios, 0, "S4BIOS mode"); 421 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 422 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 423 &sc->acpi_verbose, 0, "verbose mode"); 424 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 425 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 426 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 427 sc->acpi_disable_on_poweroff = 1; 428 sc->acpi_sleep_delay = 0; 429 sc->acpi_s4bios = 1; 430 if (bootverbose) 431 sc->acpi_verbose = 1; 432 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 433 sc->acpi_verbose = 1; 434 freeenv(env); 435 } 436 437 /* 438 * Dispatch the default sleep state to devices. 439 * TBD: should be configured from userland policy manager. 440 */ 441 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 442 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 443 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 444 sc->acpi_standby_sx = ACPI_STATE_S1; 445 sc->acpi_suspend_sx = ACPI_STATE_S3; 446 447 acpi_enable_fixed_events(sc); 448 449 /* 450 * Scan the namespace and attach/initialise children. 451 */ 452 #ifdef ACPI_DEBUGGER 453 debugpoint = getenv("debug.acpi.debugger"); 454 if (debugpoint) { 455 if (!strcmp(debugpoint, "probe")) 456 acpi_EnterDebugger(); 457 freeenv(debugpoint); 458 } 459 #endif 460 461 /* 462 * Register our shutdown handlers 463 */ 464 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 465 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 466 467 /* 468 * Register our acpi event handlers. 469 * XXX should be configurable eg. via userland policy manager. 470 */ 471 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 472 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 473 474 /* 475 * Flag our initial states. 476 */ 477 sc->acpi_enabled = 1; 478 sc->acpi_sstate = ACPI_STATE_S0; 479 sc->acpi_sleep_disabled = 0; 480 481 /* 482 * Create the control device 483 */ 484 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 485 "acpi"); 486 sc->acpi_dev_t->si_drv1 = sc; 487 488 #ifdef ACPI_DEBUGGER 489 debugpoint = getenv("debug.acpi.debugger"); 490 if (debugpoint) { 491 if (!strcmp(debugpoint, "running")) 492 acpi_EnterDebugger(); 493 freeenv(debugpoint); 494 } 495 #endif 496 497 #ifdef ACPI_USE_THREADS 498 if ((error = acpi_task_thread_init())) { 499 goto out; 500 } 501 #endif 502 503 if ((error = acpi_machdep_init(dev))) { 504 goto out; 505 } 506 507 /* Register ACPI again to pass the correct argument of pm_func. */ 508 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 509 510 if (!acpi_disabled("bus")) 511 acpi_probe_children(dev); 512 513 error = 0; 514 515 out: 516 ACPI_UNLOCK; 517 return_VALUE(error); 518 } 519 520 /* 521 * Handle a new device being added 522 */ 523 static device_t 524 acpi_add_child(device_t bus, int order, const char *name, int unit) 525 { 526 struct acpi_device *ad; 527 device_t child; 528 529 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 530 return(NULL); 531 bzero(ad, sizeof(*ad)); 532 533 resource_list_init(&ad->ad_rl); 534 535 child = device_add_child_ordered(bus, order, name, unit); 536 if (child != NULL) 537 device_set_ivars(child, ad); 538 return(child); 539 } 540 541 static int 542 acpi_print_child(device_t bus, device_t child) 543 { 544 struct acpi_device *adev = device_get_ivars(child); 545 struct resource_list *rl = &adev->ad_rl; 546 int retval = 0; 547 548 retval += bus_print_child_header(bus, child); 549 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 550 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 551 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 552 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 553 retval += bus_print_child_footer(bus, child); 554 555 return(retval); 556 } 557 558 559 /* 560 * Handle per-device ivars 561 */ 562 static int 563 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 564 { 565 struct acpi_device *ad; 566 567 if ((ad = device_get_ivars(child)) == NULL) { 568 printf("device has no ivars\n"); 569 return(ENOENT); 570 } 571 572 switch(index) { 573 /* ACPI ivars */ 574 case ACPI_IVAR_HANDLE: 575 *(ACPI_HANDLE *)result = ad->ad_handle; 576 break; 577 case ACPI_IVAR_MAGIC: 578 *(int *)result = ad->ad_magic; 579 break; 580 case ACPI_IVAR_PRIVATE: 581 *(void **)result = ad->ad_private; 582 break; 583 584 /* ISA compatibility */ 585 case ISA_IVAR_VENDORID: 586 case ISA_IVAR_SERIAL: 587 case ISA_IVAR_COMPATID: 588 *(int *)result = -1; 589 break; 590 591 case ISA_IVAR_LOGICALID: 592 *(int *)result = acpi_isa_get_logicalid(child); 593 break; 594 595 default: 596 return(ENOENT); 597 } 598 return(0); 599 } 600 601 static int 602 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 603 { 604 struct acpi_device *ad; 605 606 if ((ad = device_get_ivars(child)) == NULL) { 607 printf("device has no ivars\n"); 608 return(ENOENT); 609 } 610 611 switch(index) { 612 /* ACPI ivars */ 613 case ACPI_IVAR_HANDLE: 614 ad->ad_handle = (ACPI_HANDLE)value; 615 break; 616 case ACPI_IVAR_MAGIC: 617 ad->ad_magic = (int )value; 618 break; 619 case ACPI_IVAR_PRIVATE: 620 ad->ad_private = (void *)value; 621 break; 622 623 default: 624 panic("bad ivar write request (%d)", index); 625 return(ENOENT); 626 } 627 return(0); 628 } 629 630 /* 631 * Handle child resource allocation/removal 632 */ 633 static int 634 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 635 { 636 struct acpi_device *ad = device_get_ivars(child); 637 struct resource_list *rl = &ad->ad_rl; 638 639 resource_list_add(rl, type, rid, start, start + count -1, count); 640 641 return(0); 642 } 643 644 static int 645 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 646 { 647 struct acpi_device *ad = device_get_ivars(child); 648 struct resource_list *rl = &ad->ad_rl; 649 struct resource_list_entry *rle; 650 651 rle = resource_list_find(rl, type, rid); 652 if (!rle) 653 return(ENOENT); 654 655 if (startp) 656 *startp = rle->start; 657 if (countp) 658 *countp = rle->count; 659 660 return(0); 661 } 662 663 static struct resource * 664 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 665 u_long start, u_long end, u_long count, u_int flags) 666 { 667 struct acpi_device *ad = device_get_ivars(child); 668 struct resource_list *rl = &ad->ad_rl; 669 670 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 671 } 672 673 static int 674 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 675 { 676 struct acpi_device *ad = device_get_ivars(child); 677 struct resource_list *rl = &ad->ad_rl; 678 679 return(resource_list_release(rl, bus, child, type, rid, r)); 680 } 681 682 /* 683 * Handle ISA-like devices probing for a PnP ID to match. 684 */ 685 #define PNP_EISAID(s) \ 686 ((((s[0] - '@') & 0x1f) << 2) \ 687 | (((s[1] - '@') & 0x18) >> 3) \ 688 | (((s[1] - '@') & 0x07) << 13) \ 689 | (((s[2] - '@') & 0x1f) << 8) \ 690 | (PNP_HEXTONUM(s[4]) << 16) \ 691 | (PNP_HEXTONUM(s[3]) << 20) \ 692 | (PNP_HEXTONUM(s[6]) << 24) \ 693 | (PNP_HEXTONUM(s[5]) << 28)) 694 695 static u_int32_t 696 acpi_isa_get_logicalid(device_t dev) 697 { 698 ACPI_HANDLE h; 699 ACPI_DEVICE_INFO devinfo; 700 ACPI_STATUS error; 701 u_int32_t pnpid; 702 ACPI_LOCK_DECL; 703 704 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 705 706 pnpid = 0; 707 ACPI_LOCK; 708 709 /* fetch and validate the HID */ 710 if ((h = acpi_get_handle(dev)) == NULL) 711 goto out; 712 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 713 goto out; 714 if (!(devinfo.Valid & ACPI_VALID_HID)) 715 goto out; 716 717 pnpid = PNP_EISAID(devinfo.HardwareId); 718 out: 719 ACPI_UNLOCK; 720 return_VALUE(pnpid); 721 } 722 723 static u_int32_t 724 acpi_isa_get_compatid(device_t dev) 725 { 726 ACPI_HANDLE h; 727 ACPI_DEVICE_INFO devinfo; 728 ACPI_STATUS error; 729 u_int32_t pnpid; 730 ACPI_LOCK_DECL; 731 732 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 733 734 pnpid = 0; 735 ACPI_LOCK; 736 737 /* fetch and validate the HID */ 738 if ((h = acpi_get_handle(dev)) == NULL) 739 goto out; 740 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 741 goto out; 742 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid))) 743 goto out; 744 745 out: 746 ACPI_UNLOCK; 747 return_VALUE(pnpid); 748 } 749 750 751 static int 752 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 753 { 754 int result; 755 u_int32_t lid, cid; 756 757 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 758 759 /* 760 * ISA-style drivers attached to ACPI may persist and 761 * probe manually if we return ENOENT. We never want 762 * that to happen, so don't ever return it. 763 */ 764 result = ENXIO; 765 766 /* scan the supplied IDs for a match */ 767 lid = acpi_isa_get_logicalid(child); 768 cid = acpi_isa_get_compatid(child); 769 while (ids && ids->ip_id) { 770 if (lid == ids->ip_id || cid == ids->ip_id) { 771 result = 0; 772 goto out; 773 } 774 ids++; 775 } 776 out: 777 return_VALUE(result); 778 } 779 780 /* 781 * Scan relevant portions of the ACPI namespace and attach child devices. 782 * 783 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 784 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 785 */ 786 static void 787 acpi_probe_children(device_t bus) 788 { 789 ACPI_HANDLE parent; 790 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 791 int i; 792 793 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 794 ACPI_ASSERTLOCK; 795 796 /* 797 * Create any static children by calling device identify methods. 798 */ 799 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 800 bus_generic_probe(bus); 801 802 /* 803 * Scan the namespace and insert placeholders for all the devices that 804 * we find. 805 * 806 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 807 * we want to create nodes for all devices, not just those that are currently 808 * present. (This assumes that we don't want to create/remove devices as they 809 * appear, which might be smarter.) 810 */ 811 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 812 for (i = 0; scopes[i] != NULL; i++) 813 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent))) 814 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 815 816 /* 817 * Scan all of the child devices we have created and let them probe/attach. 818 */ 819 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 820 bus_generic_attach(bus); 821 822 /* 823 * Some of these children may have attached others as part of their attach 824 * process (eg. the root PCI bus driver), so rescan. 825 */ 826 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 827 bus_generic_attach(bus); 828 829 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 830 return_VOID; 831 } 832 833 /* 834 * Evaluate a child device and determine whether we might attach a device to 835 * it. 836 */ 837 static ACPI_STATUS 838 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 839 { 840 ACPI_OBJECT_TYPE type; 841 device_t child, bus = (device_t)context; 842 843 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 844 845 /* 846 * Skip this device if we think we'll have trouble with it. 847 */ 848 if (acpi_avoid(handle)) 849 return_ACPI_STATUS(AE_OK); 850 851 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 852 switch(type) { 853 case ACPI_TYPE_DEVICE: 854 case ACPI_TYPE_PROCESSOR: 855 case ACPI_TYPE_THERMAL: 856 case ACPI_TYPE_POWER: 857 if (acpi_disabled("children")) 858 break; 859 /* 860 * Create a placeholder device for this node. Sort the placeholder 861 * so that the probe/attach passes will run breadth-first. 862 */ 863 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 864 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 865 if (child == NULL) 866 break; 867 acpi_set_handle(child, handle); 868 869 /* 870 * Check that the device is present. If it's not present, 871 * leave it disabled (so that we have a device_t attached to 872 * the handle, but we don't probe it). 873 */ 874 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 875 device_disable(child); 876 break; 877 } 878 879 /* 880 * Get the device's resource settings and attach them. 881 * Note that if the device has _PRS but no _CRS, we need 882 * to decide when it's appropriate to try to configure the 883 * device. Ignore the return value here; it's OK for the 884 * device not to have any resources. 885 */ 886 acpi_parse_resources(child, handle, &acpi_res_parse_set); 887 888 /* if we're debugging, probe/attach now rather than later */ 889 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 890 break; 891 } 892 } 893 return_ACPI_STATUS(AE_OK); 894 } 895 896 static void 897 acpi_shutdown_pre_sync(void *arg, int howto) 898 { 899 900 struct acpi_softc *sc = arg; 901 902 ACPI_ASSERTLOCK; 903 904 /* 905 * Disable all ACPI events before soft off, otherwise the system 906 * will be turned on again on some laptops. 907 * 908 * XXX this should probably be restricted to masking some events just 909 * before powering down, since we may still need ACPI during the 910 * shutdown process. 911 */ 912 if (sc->acpi_disable_on_poweroff) 913 acpi_Disable(sc); 914 } 915 916 static void 917 acpi_shutdown_final(void *arg, int howto) 918 { 919 ACPI_STATUS status; 920 921 ACPI_ASSERTLOCK; 922 923 if (howto & RB_POWEROFF) { 924 printf("Power system off using ACPI...\n"); 925 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) { 926 printf("AcpiEnterSleepStatePrep failed - %s\n", 927 AcpiFormatException(status)); 928 return; 929 } 930 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) { 931 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 932 } else { 933 DELAY(1000000); 934 printf("ACPI power-off failed - timeout\n"); 935 } 936 } else { 937 printf("Terminate ACPI\n"); 938 AcpiTerminate(); 939 } 940 } 941 942 static void 943 acpi_enable_fixed_events(struct acpi_softc *sc) 944 { 945 static int first_time = 1; 946 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 947 948 ACPI_ASSERTLOCK; 949 950 /* Enable and clear fixed events and install handlers. */ 951 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 952 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0); 953 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 954 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 955 acpi_eventhandler_power_button_for_sleep, sc); 956 if (first_time) { 957 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 958 } 959 } 960 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 961 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0); 962 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 963 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 964 acpi_eventhandler_sleep_button_for_sleep, sc); 965 if (first_time) { 966 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 967 } 968 } 969 970 first_time = 0; 971 } 972 973 /* 974 * Returns true if the device is actually present and should 975 * be attached to. This requires the present, enabled, UI-visible 976 * and diagnostics-passed bits to be set. 977 */ 978 BOOLEAN 979 acpi_DeviceIsPresent(device_t dev) 980 { 981 ACPI_HANDLE h; 982 ACPI_DEVICE_INFO devinfo; 983 ACPI_STATUS error; 984 985 ACPI_ASSERTLOCK; 986 987 if ((h = acpi_get_handle(dev)) == NULL) 988 return(FALSE); 989 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 990 return(FALSE); 991 /* if no _STA method, must be present */ 992 if (!(devinfo.Valid & ACPI_VALID_STA)) 993 return(TRUE); 994 /* return true for 'present' and 'functioning' */ 995 if ((devinfo.CurrentStatus & 0x9) == 0x9) 996 return(TRUE); 997 return(FALSE); 998 } 999 1000 /* 1001 * Returns true if the battery is actually present and inserted. 1002 */ 1003 BOOLEAN 1004 acpi_BatteryIsPresent(device_t dev) 1005 { 1006 ACPI_HANDLE h; 1007 ACPI_DEVICE_INFO devinfo; 1008 ACPI_STATUS error; 1009 1010 ACPI_ASSERTLOCK; 1011 1012 if ((h = acpi_get_handle(dev)) == NULL) 1013 return(FALSE); 1014 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1015 return(FALSE); 1016 /* if no _STA method, must be present */ 1017 if (!(devinfo.Valid & ACPI_VALID_STA)) 1018 return(TRUE); 1019 /* return true for 'present' and 'functioning' */ 1020 if ((devinfo.CurrentStatus & 0x19) == 0x19) 1021 return(TRUE); 1022 return(FALSE); 1023 } 1024 1025 /* 1026 * Match a HID string against a device 1027 */ 1028 BOOLEAN 1029 acpi_MatchHid(device_t dev, char *hid) 1030 { 1031 ACPI_HANDLE h; 1032 ACPI_DEVICE_INFO devinfo; 1033 ACPI_STATUS error; 1034 int cid; 1035 1036 ACPI_ASSERTLOCK; 1037 1038 if (hid == NULL) 1039 return(FALSE); 1040 if ((h = acpi_get_handle(dev)) == NULL) 1041 return(FALSE); 1042 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1043 return(FALSE); 1044 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 1045 return(TRUE); 1046 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid))) 1047 return(FALSE); 1048 if (cid == PNP_EISAID(hid)) 1049 return(TRUE); 1050 return(FALSE); 1051 } 1052 1053 /* 1054 * Return the handle of a named object within our scope, ie. that of (parent) 1055 * or one if its parents. 1056 */ 1057 ACPI_STATUS 1058 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1059 { 1060 ACPI_HANDLE r; 1061 ACPI_STATUS status; 1062 1063 ACPI_ASSERTLOCK; 1064 1065 /* walk back up the tree to the root */ 1066 for (;;) { 1067 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) { 1068 *result = r; 1069 return(AE_OK); 1070 } 1071 if (status != AE_NOT_FOUND) 1072 return(AE_OK); 1073 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1074 return(AE_NOT_FOUND); 1075 parent = r; 1076 } 1077 } 1078 1079 /* 1080 * Allocate a buffer with a preset data size. 1081 */ 1082 ACPI_BUFFER * 1083 acpi_AllocBuffer(int size) 1084 { 1085 ACPI_BUFFER *buf; 1086 1087 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1088 return(NULL); 1089 buf->Length = size; 1090 buf->Pointer = (void *)(buf + 1); 1091 return(buf); 1092 } 1093 1094 /* 1095 * Evaluate a path that should return an integer. 1096 */ 1097 ACPI_STATUS 1098 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1099 { 1100 ACPI_STATUS error; 1101 ACPI_BUFFER buf; 1102 ACPI_OBJECT param; 1103 1104 ACPI_ASSERTLOCK; 1105 1106 if (handle == NULL) 1107 handle = ACPI_ROOT_OBJECT; 1108 1109 /* 1110 * Assume that what we've been pointed at is an Integer object, or 1111 * a method that will return an Integer. 1112 */ 1113 buf.Pointer = ¶m; 1114 buf.Length = sizeof(param); 1115 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1116 if (param.Type == ACPI_TYPE_INTEGER) { 1117 *number = param.Integer.Value; 1118 } else { 1119 error = AE_TYPE; 1120 } 1121 } 1122 1123 /* 1124 * In some applications, a method that's expected to return an Integer 1125 * may instead return a Buffer (probably to simplify some internal 1126 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1127 * convert it into an Integer as best we can. 1128 * 1129 * This is a hack. 1130 */ 1131 if (error == AE_BUFFER_OVERFLOW) { 1132 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1133 error = AE_NO_MEMORY; 1134 } else { 1135 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1136 error = acpi_ConvertBufferToInteger(&buf, number); 1137 } 1138 } 1139 AcpiOsFree(buf.Pointer); 1140 } 1141 return(error); 1142 } 1143 1144 ACPI_STATUS 1145 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1146 { 1147 ACPI_OBJECT *p; 1148 int i; 1149 1150 p = (ACPI_OBJECT *)bufp->Pointer; 1151 if (p->Type == ACPI_TYPE_INTEGER) { 1152 *number = p->Integer.Value; 1153 return(AE_OK); 1154 } 1155 if (p->Type != ACPI_TYPE_BUFFER) 1156 return(AE_TYPE); 1157 if (p->Buffer.Length > sizeof(int)) 1158 return(AE_BAD_DATA); 1159 *number = 0; 1160 for (i = 0; i < p->Buffer.Length; i++) 1161 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1162 return(AE_OK); 1163 } 1164 1165 /* 1166 * Iterate over the elements of an a package object, calling the supplied 1167 * function for each element. 1168 * 1169 * XXX possible enhancement might be to abort traversal on error. 1170 */ 1171 ACPI_STATUS 1172 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1173 { 1174 ACPI_OBJECT *comp; 1175 int i; 1176 1177 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1178 return(AE_BAD_PARAMETER); 1179 1180 /* iterate over components */ 1181 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1182 func(comp, arg); 1183 1184 return(AE_OK); 1185 } 1186 1187 /* 1188 * Find the (index)th resource object in a set. 1189 */ 1190 ACPI_STATUS 1191 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1192 { 1193 ACPI_RESOURCE *rp; 1194 int i; 1195 1196 rp = (ACPI_RESOURCE *)buf->Pointer; 1197 i = index; 1198 while (i-- > 0) { 1199 /* range check */ 1200 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1201 return(AE_BAD_PARAMETER); 1202 /* check for terminator */ 1203 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1204 (rp->Length == 0)) 1205 return(AE_NOT_FOUND); 1206 rp = ACPI_RESOURCE_NEXT(rp); 1207 } 1208 if (resp != NULL) 1209 *resp = rp; 1210 return(AE_OK); 1211 } 1212 1213 /* 1214 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1215 * 1216 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1217 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1218 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1219 * resources. 1220 */ 1221 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1222 1223 ACPI_STATUS 1224 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1225 { 1226 ACPI_RESOURCE *rp; 1227 void *newp; 1228 1229 /* 1230 * Initialise the buffer if necessary. 1231 */ 1232 if (buf->Pointer == NULL) { 1233 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1234 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1235 return(AE_NO_MEMORY); 1236 rp = (ACPI_RESOURCE *)buf->Pointer; 1237 rp->Id = ACPI_RSTYPE_END_TAG; 1238 rp->Length = 0; 1239 } 1240 if (res == NULL) 1241 return(AE_OK); 1242 1243 /* 1244 * Scan the current buffer looking for the terminator. 1245 * This will either find the terminator or hit the end 1246 * of the buffer and return an error. 1247 */ 1248 rp = (ACPI_RESOURCE *)buf->Pointer; 1249 for (;;) { 1250 /* range check, don't go outside the buffer */ 1251 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1252 return(AE_BAD_PARAMETER); 1253 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1254 (rp->Length == 0)) { 1255 break; 1256 } 1257 rp = ACPI_RESOURCE_NEXT(rp); 1258 } 1259 1260 /* 1261 * Check the size of the buffer and expand if required. 1262 * 1263 * Required size is: 1264 * size of existing resources before terminator + 1265 * size of new resource and header + 1266 * size of terminator. 1267 * 1268 * Note that this loop should really only run once, unless 1269 * for some reason we are stuffing a *really* huge resource. 1270 */ 1271 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1272 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1273 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1274 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1275 return(AE_NO_MEMORY); 1276 bcopy(buf->Pointer, newp, buf->Length); 1277 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1278 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1279 AcpiOsFree(buf->Pointer); 1280 buf->Pointer = newp; 1281 buf->Length += buf->Length; 1282 } 1283 1284 /* 1285 * Insert the new resource. 1286 */ 1287 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1288 1289 /* 1290 * And add the terminator. 1291 */ 1292 rp = ACPI_RESOURCE_NEXT(rp); 1293 rp->Id = ACPI_RSTYPE_END_TAG; 1294 rp->Length = 0; 1295 1296 return(AE_OK); 1297 } 1298 1299 /* 1300 * Set interrupt model. 1301 */ 1302 ACPI_STATUS 1303 acpi_SetIntrModel(int model) 1304 { 1305 ACPI_OBJECT_LIST ArgList; 1306 ACPI_OBJECT Arg; 1307 1308 Arg.Type = ACPI_TYPE_INTEGER; 1309 Arg.Integer.Value = model; 1310 ArgList.Count = 1; 1311 ArgList.Pointer = &Arg; 1312 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1313 } 1314 1315 #define ACPI_MINIMUM_AWAKETIME 5 1316 1317 static void 1318 acpi_sleep_enable(void *arg) 1319 { 1320 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1321 } 1322 1323 /* 1324 * Set the system sleep state 1325 * 1326 * Currently we only support S1 and S5 1327 */ 1328 ACPI_STATUS 1329 acpi_SetSleepState(struct acpi_softc *sc, int state) 1330 { 1331 ACPI_STATUS status = AE_OK; 1332 UINT8 TypeA; 1333 UINT8 TypeB; 1334 1335 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1336 ACPI_ASSERTLOCK; 1337 1338 if (sc->acpi_sstate != ACPI_STATE_S0) 1339 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */ 1340 1341 if (sc->acpi_sleep_disabled) 1342 return_ACPI_STATUS(AE_OK); 1343 1344 switch (state) { 1345 case ACPI_STATE_S0: /* XXX only for testing */ 1346 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1347 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1348 } 1349 break; 1350 1351 case ACPI_STATE_S1: 1352 case ACPI_STATE_S2: 1353 case ACPI_STATE_S3: 1354 case ACPI_STATE_S4: 1355 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) { 1356 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status)); 1357 break; 1358 } 1359 1360 sc->acpi_sstate = state; 1361 sc->acpi_sleep_disabled = 1; 1362 1363 /* 1364 * Inform all devices that we are going to sleep. 1365 */ 1366 if (DEVICE_SUSPEND(root_bus) != 0) { 1367 /* 1368 * Re-wake the system. 1369 * 1370 * XXX note that a better two-pass approach with a 'veto' pass 1371 * followed by a "real thing" pass would be better, but the 1372 * current bus interface does not provide for this. 1373 */ 1374 DEVICE_RESUME(root_bus); 1375 return_ACPI_STATUS(AE_ERROR); 1376 } 1377 1378 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) { 1379 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1380 AcpiFormatException(status)); 1381 break; 1382 } 1383 1384 if (sc->acpi_sleep_delay > 0) { 1385 DELAY(sc->acpi_sleep_delay * 1000000); 1386 } 1387 1388 if (state != ACPI_STATE_S1) { 1389 acpi_sleep_machdep(sc, state); 1390 1391 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */ 1392 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) { 1393 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1394 } 1395 1396 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1397 if (state == ACPI_STATE_S4) { 1398 AcpiEnable(); 1399 } 1400 } else { 1401 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1402 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1403 break; 1404 } 1405 } 1406 AcpiLeaveSleepState((UINT8)state); 1407 DEVICE_RESUME(root_bus); 1408 sc->acpi_sstate = ACPI_STATE_S0; 1409 acpi_enable_fixed_events(sc); 1410 break; 1411 1412 case ACPI_STATE_S5: 1413 /* 1414 * Shut down cleanly and power off. This will call us back through the 1415 * shutdown handlers. 1416 */ 1417 shutdown_nice(RB_POWEROFF); 1418 break; 1419 1420 default: 1421 status = AE_BAD_PARAMETER; 1422 break; 1423 } 1424 1425 if (sc->acpi_sleep_disabled) 1426 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1427 1428 return_ACPI_STATUS(status); 1429 } 1430 1431 /* 1432 * Enable/Disable ACPI 1433 */ 1434 ACPI_STATUS 1435 acpi_Enable(struct acpi_softc *sc) 1436 { 1437 ACPI_STATUS status; 1438 u_int32_t flags; 1439 1440 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1441 ACPI_ASSERTLOCK; 1442 1443 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1444 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1445 if (!sc->acpi_enabled) { 1446 status = AcpiEnableSubsystem(flags); 1447 } else { 1448 status = AE_OK; 1449 } 1450 if (status == AE_OK) 1451 sc->acpi_enabled = 1; 1452 return_ACPI_STATUS(status); 1453 } 1454 1455 ACPI_STATUS 1456 acpi_Disable(struct acpi_softc *sc) 1457 { 1458 ACPI_STATUS status; 1459 1460 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1461 ACPI_ASSERTLOCK; 1462 1463 if (sc->acpi_enabled) { 1464 status = AcpiDisable(); 1465 } else { 1466 status = AE_OK; 1467 } 1468 if (status == AE_OK) 1469 sc->acpi_enabled = 0; 1470 return_ACPI_STATUS(status); 1471 } 1472 1473 /* 1474 * ACPI Event Handlers 1475 */ 1476 1477 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1478 1479 static void 1480 acpi_system_eventhandler_sleep(void *arg, int state) 1481 { 1482 ACPI_LOCK_DECL; 1483 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1484 1485 ACPI_LOCK; 1486 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1487 acpi_SetSleepState((struct acpi_softc *)arg, state); 1488 ACPI_UNLOCK; 1489 return_VOID; 1490 } 1491 1492 static void 1493 acpi_system_eventhandler_wakeup(void *arg, int state) 1494 { 1495 ACPI_LOCK_DECL; 1496 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1497 1498 /* Well, what to do? :-) */ 1499 1500 ACPI_LOCK; 1501 ACPI_UNLOCK; 1502 1503 return_VOID; 1504 } 1505 1506 /* 1507 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1508 */ 1509 UINT32 1510 acpi_eventhandler_power_button_for_sleep(void *context) 1511 { 1512 struct acpi_softc *sc = (struct acpi_softc *)context; 1513 1514 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1515 1516 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1517 1518 return_VALUE(ACPI_INTERRUPT_HANDLED); 1519 } 1520 1521 UINT32 1522 acpi_eventhandler_power_button_for_wakeup(void *context) 1523 { 1524 struct acpi_softc *sc = (struct acpi_softc *)context; 1525 1526 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1527 1528 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1529 1530 return_VALUE(ACPI_INTERRUPT_HANDLED); 1531 } 1532 1533 UINT32 1534 acpi_eventhandler_sleep_button_for_sleep(void *context) 1535 { 1536 struct acpi_softc *sc = (struct acpi_softc *)context; 1537 1538 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1539 1540 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1541 1542 return_VALUE(ACPI_INTERRUPT_HANDLED); 1543 } 1544 1545 UINT32 1546 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1547 { 1548 struct acpi_softc *sc = (struct acpi_softc *)context; 1549 1550 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1551 1552 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1553 1554 return_VALUE(ACPI_INTERRUPT_HANDLED); 1555 } 1556 1557 /* 1558 * XXX This is kinda ugly, and should not be here. 1559 */ 1560 struct acpi_staticbuf { 1561 ACPI_BUFFER buffer; 1562 char data[512]; 1563 }; 1564 1565 char * 1566 acpi_name(ACPI_HANDLE handle) 1567 { 1568 static struct acpi_staticbuf buf; 1569 1570 ACPI_ASSERTLOCK; 1571 1572 buf.buffer.Length = 512; 1573 buf.buffer.Pointer = &buf.data[0]; 1574 1575 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1576 return(buf.buffer.Pointer); 1577 return("(unknown path)"); 1578 } 1579 1580 /* 1581 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1582 * parts of the namespace. 1583 */ 1584 int 1585 acpi_avoid(ACPI_HANDLE handle) 1586 { 1587 char *cp, *env, *np; 1588 int len; 1589 1590 np = acpi_name(handle); 1591 if (*np == '\\') 1592 np++; 1593 if ((env = getenv("debug.acpi.avoid")) == NULL) 1594 return(0); 1595 1596 /* scan the avoid list checking for a match */ 1597 cp = env; 1598 for (;;) { 1599 while ((*cp != 0) && isspace(*cp)) 1600 cp++; 1601 if (*cp == 0) 1602 break; 1603 len = 0; 1604 while ((cp[len] != 0) && !isspace(cp[len])) 1605 len++; 1606 if (!strncmp(cp, np, len)) { 1607 freeenv(env); 1608 return(1); 1609 } 1610 cp += len; 1611 } 1612 freeenv(env); 1613 return(0); 1614 } 1615 1616 /* 1617 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1618 */ 1619 int 1620 acpi_disabled(char *subsys) 1621 { 1622 char *cp, *env; 1623 int len; 1624 1625 if ((env = getenv("debug.acpi.disable")) == NULL) 1626 return(0); 1627 if (!strcmp(env, "all")) { 1628 freeenv(env); 1629 return(1); 1630 } 1631 1632 /* scan the disable list checking for a match */ 1633 cp = env; 1634 for (;;) { 1635 while ((*cp != 0) && isspace(*cp)) 1636 cp++; 1637 if (*cp == 0) 1638 break; 1639 len = 0; 1640 while ((cp[len] != 0) && !isspace(cp[len])) 1641 len++; 1642 if (!strncmp(cp, subsys, len)) { 1643 freeenv(env); 1644 return(1); 1645 } 1646 cp += len; 1647 } 1648 freeenv(env); 1649 return(0); 1650 } 1651 1652 /* 1653 * Device wake capability enable/disable. 1654 */ 1655 void 1656 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1657 { 1658 ACPI_OBJECT_LIST ArgList; 1659 ACPI_OBJECT Arg; 1660 1661 /* 1662 * TBD: All Power Resources referenced by elements 2 through N 1663 * of the _PRW object are put into the ON state. 1664 */ 1665 1666 /* 1667 * enable/disable device wake function. 1668 */ 1669 1670 ArgList.Count = 1; 1671 ArgList.Pointer = &Arg; 1672 1673 Arg.Type = ACPI_TYPE_INTEGER; 1674 Arg.Integer.Value = enable; 1675 1676 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1677 } 1678 1679 void 1680 acpi_device_enable_wake_event(ACPI_HANDLE h) 1681 { 1682 struct acpi_softc *sc; 1683 ACPI_STATUS status; 1684 ACPI_BUFFER prw_buffer; 1685 ACPI_OBJECT *res; 1686 1687 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1688 1689 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) { 1690 return; 1691 } 1692 1693 /* 1694 * _PRW object is only required for devices that have the ability 1695 * to wake the system from a system sleeping state. 1696 */ 1697 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1698 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1699 if (ACPI_FAILURE(status)) { 1700 return; 1701 } 1702 1703 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1704 if (res == NULL) { 1705 return; 1706 } 1707 1708 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1709 goto out; 1710 } 1711 1712 /* 1713 * The element 1 of the _PRW object: 1714 * The lowest power system sleeping state that can be entered 1715 * while still providing wake functionality. 1716 * The sleeping state being entered must be greater or equal to 1717 * the power state declared in element 1 of the _PRW object. 1718 */ 1719 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) { 1720 goto out; 1721 } 1722 1723 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) { 1724 goto out; 1725 } 1726 1727 /* 1728 * The element 0 of the _PRW object: 1729 */ 1730 switch(res->Package.Elements[0].Type) { 1731 case ACPI_TYPE_INTEGER: 1732 /* 1733 * If the data type of this package element is numeric, then this 1734 * _PRW package element is the bit index in the GPEx_EN, in the 1735 * GPE blocks described in the FADT, of the enable bit that is 1736 * enabled for the wake event. 1737 */ 1738 1739 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value, 1740 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE); 1741 if (ACPI_FAILURE(status)) 1742 printf("%s: EnableEvent Failed\n", __func__); 1743 break; 1744 1745 case ACPI_TYPE_PACKAGE: 1746 /* XXX TBD */ 1747 1748 /* 1749 * If the data type of this package element is a package, then this 1750 * _PRW package element is itself a package containing two 1751 * elements. The first is an object reference to the GPE Block 1752 * device that contains the GPE that will be triggered by the wake 1753 * event. The second element is numeric and it contains the bit 1754 * index in the GPEx_EN, in the GPE Block referenced by the 1755 * first element in the package, of the enable bit that is enabled for 1756 * the wake event. 1757 * For example, if this field is a package then it is of the form: 1758 * Package() {\_SB.PCI0.ISA.GPE, 2} 1759 */ 1760 1761 break; 1762 1763 default: 1764 break; 1765 } 1766 1767 out: 1768 if (prw_buffer.Pointer != NULL) 1769 AcpiOsFree(prw_buffer.Pointer); 1770 return; 1771 } 1772 1773 /* 1774 * Control interface. 1775 * 1776 * We multiplex ioctls for all participating ACPI devices here. Individual 1777 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1778 * interface to make their handlers visible. 1779 */ 1780 struct acpi_ioctl_hook 1781 { 1782 TAILQ_ENTRY(acpi_ioctl_hook) link; 1783 u_long cmd; 1784 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1785 void *arg; 1786 }; 1787 1788 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1789 static int acpi_ioctl_hooks_initted; 1790 1791 /* 1792 * Register an ioctl handler. 1793 */ 1794 int 1795 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1796 { 1797 struct acpi_ioctl_hook *hp; 1798 1799 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1800 return(ENOMEM); 1801 hp->cmd = cmd; 1802 hp->fn = fn; 1803 hp->arg = arg; 1804 if (acpi_ioctl_hooks_initted == 0) { 1805 TAILQ_INIT(&acpi_ioctl_hooks); 1806 acpi_ioctl_hooks_initted = 1; 1807 } 1808 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1809 return(0); 1810 } 1811 1812 /* 1813 * Deregister an ioctl handler. 1814 */ 1815 void 1816 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1817 { 1818 struct acpi_ioctl_hook *hp; 1819 1820 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1821 if ((hp->cmd == cmd) && (hp->fn == fn)) 1822 break; 1823 1824 if (hp != NULL) { 1825 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1826 free(hp, M_ACPIDEV); 1827 } 1828 } 1829 1830 static int 1831 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 1832 { 1833 return(0); 1834 } 1835 1836 static int 1837 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 1838 { 1839 return(0); 1840 } 1841 1842 static int 1843 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 1844 { 1845 struct acpi_softc *sc; 1846 struct acpi_ioctl_hook *hp; 1847 int error, xerror, state; 1848 ACPI_LOCK_DECL; 1849 1850 ACPI_LOCK; 1851 1852 error = state = 0; 1853 sc = dev->si_drv1; 1854 1855 /* 1856 * Scan the list of registered ioctls, looking for handlers. 1857 */ 1858 if (acpi_ioctl_hooks_initted) { 1859 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1860 if (hp->cmd == cmd) { 1861 xerror = hp->fn(cmd, addr, hp->arg); 1862 if (xerror != 0) 1863 error = xerror; 1864 goto out; 1865 } 1866 } 1867 } 1868 1869 /* 1870 * Core ioctls are not permitted for non-writable user. 1871 * Currently, other ioctls just fetch information. 1872 * Not changing system behavior. 1873 */ 1874 if(!(flag & FWRITE)){ 1875 return EPERM; 1876 } 1877 1878 /* 1879 * Core system ioctls. 1880 */ 1881 switch (cmd) { 1882 case ACPIIO_ENABLE: 1883 if (ACPI_FAILURE(acpi_Enable(sc))) 1884 error = ENXIO; 1885 break; 1886 1887 case ACPIIO_DISABLE: 1888 if (ACPI_FAILURE(acpi_Disable(sc))) 1889 error = ENXIO; 1890 break; 1891 1892 case ACPIIO_SETSLPSTATE: 1893 if (!sc->acpi_enabled) { 1894 error = ENXIO; 1895 break; 1896 } 1897 state = *(int *)addr; 1898 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1899 acpi_SetSleepState(sc, state); 1900 } else { 1901 error = EINVAL; 1902 } 1903 break; 1904 1905 default: 1906 if (error == 0) 1907 error = EINVAL; 1908 break; 1909 } 1910 1911 out: 1912 ACPI_UNLOCK; 1913 return(error); 1914 } 1915 1916 static int 1917 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1918 { 1919 char sleep_state[10]; 1920 int error; 1921 u_int new_state, old_state; 1922 1923 old_state = *(u_int *)oidp->oid_arg1; 1924 if (old_state > ACPI_S_STATES_MAX+1) { 1925 strcpy(sleep_state, "unknown"); 1926 } else { 1927 bzero(sleep_state, sizeof(sleep_state)); 1928 strncpy(sleep_state, sleep_state_names[old_state], 1929 sizeof(sleep_state_names[old_state])); 1930 } 1931 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1932 if (error == 0 && req->newptr != NULL) { 1933 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) { 1934 if (strncmp(sleep_state, sleep_state_names[new_state], 1935 sizeof(sleep_state)) == 0) 1936 break; 1937 } 1938 if (new_state <= ACPI_S_STATES_MAX+1) { 1939 if (new_state != old_state) { 1940 *(u_int *)oidp->oid_arg1 = new_state; 1941 } 1942 } else { 1943 error = EINVAL; 1944 } 1945 } 1946 return(error); 1947 } 1948 1949 #ifdef ACPI_DEBUG 1950 /* 1951 * Support for parsing debug options from the kernel environment. 1952 * 1953 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1954 * by specifying the names of the bits in the debug.acpi.layer and 1955 * debug.acpi.level environment variables. Bits may be unset by 1956 * prefixing the bit name with !. 1957 */ 1958 struct debugtag 1959 { 1960 char *name; 1961 UINT32 value; 1962 }; 1963 1964 static struct debugtag dbg_layer[] = { 1965 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1966 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1967 {"ACPI_EVENTS", ACPI_EVENTS}, 1968 {"ACPI_TABLES", ACPI_TABLES}, 1969 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 1970 {"ACPI_PARSER", ACPI_PARSER}, 1971 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 1972 {"ACPI_EXECUTER", ACPI_EXECUTER}, 1973 {"ACPI_RESOURCES", ACPI_RESOURCES}, 1974 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 1975 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 1976 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 1977 1978 {"ACPI_BUS", ACPI_BUS}, 1979 {"ACPI_SYSTEM", ACPI_SYSTEM}, 1980 {"ACPI_POWER", ACPI_POWER}, 1981 {"ACPI_EC", ACPI_EC}, 1982 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 1983 {"ACPI_BATTERY", ACPI_BATTERY}, 1984 {"ACPI_BUTTON", ACPI_BUTTON}, 1985 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 1986 {"ACPI_THERMAL", ACPI_THERMAL}, 1987 {"ACPI_FAN", ACPI_FAN}, 1988 1989 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 1990 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 1991 {NULL, 0} 1992 }; 1993 1994 static struct debugtag dbg_level[] = { 1995 {"ACPI_LV_OK", ACPI_LV_OK}, 1996 {"ACPI_LV_INFO", ACPI_LV_INFO}, 1997 {"ACPI_LV_WARN", ACPI_LV_WARN}, 1998 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 1999 {"ACPI_LV_FATAL", ACPI_LV_FATAL}, 2000 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2001 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2002 2003 /* Trace verbosity level 1 [Standard Trace Level] */ 2004 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2005 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2006 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2007 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2008 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2009 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2010 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2011 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2012 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2013 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2014 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2015 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2016 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2017 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2018 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2019 2020 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2021 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2022 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2023 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2024 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2025 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2026 2027 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2028 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2029 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2030 {"ACPI_LV_IO", ACPI_LV_IO}, 2031 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2032 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2033 2034 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2035 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2036 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2037 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2038 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2039 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2040 {NULL, 0} 2041 }; 2042 2043 static void 2044 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2045 { 2046 char *ep; 2047 int i, l; 2048 int set; 2049 2050 while (*cp) { 2051 if (isspace(*cp)) { 2052 cp++; 2053 continue; 2054 } 2055 ep = cp; 2056 while (*ep && !isspace(*ep)) 2057 ep++; 2058 if (*cp == '!') { 2059 set = 0; 2060 cp++; 2061 if (cp == ep) 2062 continue; 2063 } else { 2064 set = 1; 2065 } 2066 l = ep - cp; 2067 for (i = 0; tag[i].name != NULL; i++) { 2068 if (!strncmp(cp, tag[i].name, l)) { 2069 if (set) { 2070 *flag |= tag[i].value; 2071 } else { 2072 *flag &= ~tag[i].value; 2073 } 2074 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2075 } 2076 } 2077 cp = ep; 2078 } 2079 } 2080 2081 static void 2082 acpi_set_debugging(void *junk) 2083 { 2084 char *cp; 2085 2086 if (!cold) 2087 return; 2088 2089 AcpiDbgLayer = 0; 2090 AcpiDbgLevel = 0; 2091 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2092 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2093 freeenv(cp); 2094 } 2095 if ((cp = getenv("debug.acpi.level")) != NULL) { 2096 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2097 freeenv(cp); 2098 } 2099 2100 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 2101 } 2102 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 2103 #endif 2104 2105 static int 2106 acpi_pm_func(u_long cmd, void *arg, ...) 2107 { 2108 int state, acpi_state; 2109 int error; 2110 struct acpi_softc *sc; 2111 va_list ap; 2112 2113 error = 0; 2114 switch (cmd) { 2115 case POWER_CMD_SUSPEND: 2116 sc = (struct acpi_softc *)arg; 2117 if (sc == NULL) { 2118 error = EINVAL; 2119 goto out; 2120 } 2121 2122 va_start(ap, arg); 2123 state = va_arg(ap, int); 2124 va_end(ap); 2125 2126 switch (state) { 2127 case POWER_SLEEP_STATE_STANDBY: 2128 acpi_state = sc->acpi_standby_sx; 2129 break; 2130 case POWER_SLEEP_STATE_SUSPEND: 2131 acpi_state = sc->acpi_suspend_sx; 2132 break; 2133 case POWER_SLEEP_STATE_HIBERNATE: 2134 acpi_state = ACPI_STATE_S4; 2135 break; 2136 default: 2137 error = EINVAL; 2138 goto out; 2139 } 2140 2141 acpi_SetSleepState(sc, acpi_state); 2142 break; 2143 2144 default: 2145 error = EINVAL; 2146 goto out; 2147 } 2148 2149 out: 2150 return (error); 2151 } 2152 2153 static void 2154 acpi_pm_register(void *arg) 2155 { 2156 int error; 2157 2158 if (!cold) 2159 return; 2160 2161 if (!resource_int_value("acpi", 0, "disabled", &error) && 2162 (error != 0)) 2163 return; 2164 2165 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2166 } 2167 2168 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2169 2170