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: src/sys/dev/acpica/acpi.c,v 1.95.2.1 2003/08/22 20:49:20 jhb Exp $ 30 * $DragonFly: src/sys/dev/acpica/Attic/acpi.c,v 1.6 2004/05/19 22:52:40 dillon Exp $ 31 */ 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/ioccom.h> 42 #include <sys/reboot.h> 43 #include <sys/sysctl.h> 44 #include <sys/ctype.h> 45 #include <sys/linker.h> 46 #include <sys/power.h> 47 48 #include <machine/clock.h> 49 #include <machine/resource.h> 50 51 #include <bus/isa/isavar.h> 52 53 #include "acpi.h" 54 55 #include <dev/acpica/acpica_support.h> 56 57 #include <dev/acpica/acpivar.h> 58 #include <dev/acpica/acpiio.h> 59 60 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 61 62 /* 63 * Hooks for the ACPI CA debugging infrastructure 64 */ 65 #define _COMPONENT ACPI_BUS 66 ACPI_MODULE_NAME("ACPI") 67 68 /* 69 * Character device 70 */ 71 72 static d_open_t acpiopen; 73 static d_close_t acpiclose; 74 static d_ioctl_t acpiioctl; 75 76 #define CDEV_MAJOR 152 77 static struct cdevsw acpi_cdevsw = { 78 79 .d_name = "acpi", 80 .d_maj = CDEV_MAJOR, 81 .d_flags = 0, 82 .d_port = NULL, 83 .d_clone = NULL, 84 .old_open = acpiopen, 85 .old_close = acpiclose, 86 .old_ioctl = acpiioctl, 87 /* 88 .d_open = acpiopen, 89 .d_close = acpiclose, 90 .d_ioctl = acpiioctl, 91 */ 92 93 94 }; 95 96 static const char* sleep_state_names[] = { 97 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 98 99 /* this has to be static, as the softc is gone when we need it */ 100 static int acpi_off_state = ACPI_STATE_S5; 101 102 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000 103 struct mtx acpi_mutex; 104 #endif 105 106 static int acpi_modevent(struct module *mod, int event, void *junk); 107 static void acpi_identify(driver_t *driver, device_t parent); 108 static int acpi_probe(device_t dev); 109 static int acpi_attach(device_t dev); 110 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 111 static int acpi_print_child(device_t bus, device_t child); 112 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 113 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 114 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 115 u_long count); 116 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 117 u_long *countp); 118 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 119 u_long start, u_long end, u_long count, u_int flags); 120 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 121 static u_int32_t acpi_isa_get_logicalid(device_t dev); 122 static u_int32_t acpi_isa_get_compatid(device_t dev); 123 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 124 125 static void acpi_probe_children(device_t bus); 126 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 127 128 static void acpi_shutdown_pre_sync(void *arg, int howto); 129 static void acpi_shutdown_final(void *arg, int howto); 130 131 static void acpi_enable_fixed_events(struct acpi_softc *sc); 132 133 static void acpi_system_eventhandler_sleep(void *arg, int state); 134 static void acpi_system_eventhandler_wakeup(void *arg, int state); 135 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 136 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 137 138 static int acpi_pm_func(u_long cmd, void *arg, ...); 139 140 static device_method_t acpi_methods[] = { 141 /* Device interface */ 142 DEVMETHOD(device_identify, acpi_identify), 143 DEVMETHOD(device_probe, acpi_probe), 144 DEVMETHOD(device_attach, acpi_attach), 145 DEVMETHOD(device_shutdown, bus_generic_shutdown), 146 DEVMETHOD(device_suspend, bus_generic_suspend), 147 DEVMETHOD(device_resume, bus_generic_resume), 148 149 /* Bus interface */ 150 DEVMETHOD(bus_add_child, acpi_add_child), 151 DEVMETHOD(bus_print_child, acpi_print_child), 152 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 153 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 154 DEVMETHOD(bus_set_resource, acpi_set_resource), 155 DEVMETHOD(bus_get_resource, acpi_get_resource), 156 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 157 DEVMETHOD(bus_release_resource, acpi_release_resource), 158 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 159 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 160 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 161 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 162 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 163 164 /* ISA emulation */ 165 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 166 167 {0, 0} 168 }; 169 170 static driver_t acpi_driver = { 171 "acpi", 172 acpi_methods, 173 sizeof(struct acpi_softc), 174 }; 175 176 static devclass_t acpi_devclass; 177 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 178 MODULE_VERSION(acpi, 100); 179 180 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 181 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 182 static int acpi_ca_version = ACPI_CA_VERSION; 183 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 184 185 /* 186 * ACPI can only be loaded as a module by the loader; activating it after 187 * system bootstrap time is not useful, and can be fatal to the system. 188 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 189 */ 190 static int 191 acpi_modevent(struct module *mod, int event, void *junk) 192 { 193 switch(event) { 194 case MOD_LOAD: 195 if (!cold) { 196 printf("The ACPI driver cannot be loaded after boot.\n"); 197 return(EPERM); 198 } 199 break; 200 case MOD_UNLOAD: 201 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 202 return(EBUSY); 203 break; 204 default: 205 break; 206 } 207 return(0); 208 } 209 210 /* 211 * Detect ACPI, perform early initialisation 212 */ 213 static void 214 acpi_identify(driver_t *driver, device_t parent) 215 { 216 device_t child; 217 int error; 218 #ifdef ACPI_DEBUGGER 219 char *debugpoint; 220 #endif 221 222 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 223 224 if (!cold) 225 return_VOID; 226 227 /* 228 * Check that we haven't been disabled with a hint. 229 */ 230 if (!resource_int_value("acpi", 0, "disabled", &error) && 231 (error != 0)) 232 return_VOID; 233 234 /* 235 * Make sure we're not being doubly invoked. 236 */ 237 if (device_find_child(parent, "acpi", 0) != NULL) 238 return_VOID; 239 240 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000 241 /* initialise the ACPI mutex */ 242 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 243 #endif 244 245 /* 246 * Start up the ACPI CA subsystem. 247 */ 248 #ifdef ACPI_DEBUGGER 249 debugpoint = getenv("debug.acpi.debugger"); 250 if (debugpoint) { 251 if (!strcmp(debugpoint, "init")) 252 acpi_EnterDebugger(); 253 freeenv(debugpoint); 254 } 255 #endif 256 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 257 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 258 return_VOID; 259 } 260 #ifdef ACPI_DEBUGGER 261 debugpoint = getenv("debug.acpi.debugger"); 262 if (debugpoint) { 263 if (!strcmp(debugpoint, "tables")) 264 acpi_EnterDebugger(); 265 freeenv(debugpoint); 266 } 267 #endif 268 269 if (ACPI_FAILURE(error = AcpiLoadTables())) { 270 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 271 return_VOID; 272 } 273 274 /* 275 * Attach the actual ACPI device. 276 */ 277 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 278 device_printf(parent, "ACPI: could not attach\n"); 279 return_VOID; 280 } 281 } 282 283 /* 284 * Fetch some descriptive data from ACPI to put in our attach message 285 */ 286 static int 287 acpi_probe(device_t dev) 288 { 289 ACPI_TABLE_HEADER th; 290 char buf[20]; 291 ACPI_STATUS status; 292 int error; 293 ACPI_LOCK_DECL; 294 295 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 296 297 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 298 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 299 device_printf(dev, "Other PM system enabled.\n"); 300 return_VALUE(ENXIO); 301 } 302 303 ACPI_LOCK; 304 305 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 306 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 307 error = ENXIO; 308 } else { 309 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 310 device_set_desc_copy(dev, buf); 311 error = 0; 312 } 313 ACPI_UNLOCK; 314 return_VALUE(error); 315 } 316 317 static int 318 acpi_attach(device_t dev) 319 { 320 struct acpi_softc *sc; 321 ACPI_STATUS status; 322 int error; 323 UINT32 flags; 324 char *env; 325 #ifdef ACPI_DEBUGGER 326 char *debugpoint; 327 #endif 328 ACPI_LOCK_DECL; 329 330 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 331 ACPI_LOCK; 332 sc = device_get_softc(dev); 333 bzero(sc, sizeof(*sc)); 334 sc->acpi_dev = dev; 335 336 #ifdef ACPI_DEBUGGER 337 debugpoint = getenv("debug.acpi.debugger"); 338 if (debugpoint) { 339 if (!strcmp(debugpoint, "spaces")) 340 acpi_EnterDebugger(); 341 freeenv(debugpoint); 342 } 343 #endif 344 345 /* 346 * Install the default address space handlers. 347 */ 348 error = ENXIO; 349 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 350 ACPI_ADR_SPACE_SYSTEM_MEMORY, 351 ACPI_DEFAULT_HANDLER, 352 NULL, NULL))) { 353 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 354 goto out; 355 } 356 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 357 ACPI_ADR_SPACE_SYSTEM_IO, 358 ACPI_DEFAULT_HANDLER, 359 NULL, NULL))) { 360 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 361 goto out; 362 } 363 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 364 ACPI_ADR_SPACE_PCI_CONFIG, 365 ACPI_DEFAULT_HANDLER, 366 NULL, NULL))) { 367 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 368 goto out; 369 } 370 371 /* 372 * Bring ACPI fully online. 373 * 374 * Note that some systems (specifically, those with namespace evaluation issues 375 * that require the avoidance of parts of the namespace) must avoid running _INI 376 * and _STA on everything, as well as dodging the final object init pass. 377 * 378 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 379 * 380 * XXX We should arrange for the object init pass after we have attached all our 381 * child devices, but on many systems it works here. 382 */ 383 #ifdef ACPI_DEBUGGER 384 debugpoint = getenv("debug.acpi.debugger"); 385 if (debugpoint) { 386 if (!strcmp(debugpoint, "enable")) 387 acpi_EnterDebugger(); 388 freeenv(debugpoint); 389 } 390 #endif 391 flags = 0; 392 if (testenv("debug.acpi.avoid")) 393 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 394 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 395 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 396 goto out; 397 } 398 399 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 400 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status)); 401 goto out; 402 } 403 404 /* 405 * Setup our sysctl tree. 406 * 407 * XXX: This doesn't check to make sure that none of these fail. 408 */ 409 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 410 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 411 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 412 device_get_name(dev), CTLFLAG_RD, 0, ""); 413 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 414 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 415 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 416 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 417 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 418 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 419 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 420 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 421 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 422 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 423 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 424 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 425 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 426 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 427 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 428 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 429 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 430 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 431 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 432 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 433 &sc->acpi_sleep_delay, 0, "sleep delay"); 434 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 435 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 436 &sc->acpi_s4bios, 0, "S4BIOS mode"); 437 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 438 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 439 &sc->acpi_verbose, 0, "verbose mode"); 440 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 441 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 442 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 443 sc->acpi_disable_on_poweroff = 1; 444 sc->acpi_sleep_delay = 0; 445 sc->acpi_s4bios = 1; 446 if (bootverbose) 447 sc->acpi_verbose = 1; 448 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 449 sc->acpi_verbose = 1; 450 freeenv(env); 451 } 452 453 /* 454 * Dispatch the default sleep state to devices. 455 * TBD: should be configured from userland policy manager. 456 */ 457 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 458 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 459 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 460 sc->acpi_standby_sx = ACPI_STATE_S1; 461 sc->acpi_suspend_sx = ACPI_STATE_S3; 462 463 acpi_enable_fixed_events(sc); 464 465 /* 466 * Scan the namespace and attach/initialise children. 467 */ 468 #ifdef ACPI_DEBUGGER 469 debugpoint = getenv("debug.acpi.debugger"); 470 if (debugpoint) { 471 if (!strcmp(debugpoint, "probe")) 472 acpi_EnterDebugger(); 473 freeenv(debugpoint); 474 } 475 #endif 476 477 /* 478 * Register our shutdown handlers 479 */ 480 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 481 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 482 483 /* 484 * Register our acpi event handlers. 485 * XXX should be configurable eg. via userland policy manager. 486 */ 487 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 488 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 489 490 /* 491 * Flag our initial states. 492 */ 493 sc->acpi_enabled = 1; 494 sc->acpi_sstate = ACPI_STATE_S0; 495 sc->acpi_sleep_disabled = 0; 496 497 /* 498 * Create the control device 499 */ 500 cdevsw_add(&acpi_cdevsw, 0, 0); 501 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 502 "acpi"); 503 sc->acpi_dev_t->si_drv1 = sc; 504 505 #ifdef ACPI_DEBUGGER 506 debugpoint = getenv("debug.acpi.debugger"); 507 if (debugpoint) { 508 if (!strcmp(debugpoint, "running")) 509 acpi_EnterDebugger(); 510 freeenv(debugpoint); 511 } 512 #endif 513 514 #ifdef ACPI_USE_THREADS 515 if ((error = acpi_task_thread_init())) { 516 goto out; 517 } 518 #endif 519 520 if ((error = acpi_machdep_init(dev))) { 521 goto out; 522 } 523 524 /* Register ACPI again to pass the correct argument of pm_func. */ 525 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 526 527 if (!acpi_disabled("bus")) 528 acpi_probe_children(dev); 529 530 error = 0; 531 532 out: 533 ACPI_UNLOCK; 534 return_VALUE(error); 535 } 536 537 /* 538 * Handle a new device being added 539 */ 540 static device_t 541 acpi_add_child(device_t bus, int order, const char *name, int unit) 542 { 543 struct acpi_device *ad; 544 device_t child; 545 546 ad = malloc(sizeof(*ad), M_ACPIDEV, M_INTWAIT | M_ZERO); 547 548 resource_list_init(&ad->ad_rl); 549 550 child = device_add_child_ordered(bus, order, name, unit); 551 if (child != NULL) 552 device_set_ivars(child, ad); 553 return(child); 554 } 555 556 static int 557 acpi_print_child(device_t bus, device_t child) 558 { 559 struct acpi_device *adev = device_get_ivars(child); 560 struct resource_list *rl = &adev->ad_rl; 561 int retval = 0; 562 563 retval += bus_print_child_header(bus, child); 564 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 565 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 566 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 567 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 568 retval += bus_print_child_footer(bus, child); 569 570 return(retval); 571 } 572 573 574 /* 575 * Handle per-device ivars 576 */ 577 static int 578 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 579 { 580 struct acpi_device *ad; 581 582 if ((ad = device_get_ivars(child)) == NULL) { 583 printf("device has no ivars\n"); 584 return(ENOENT); 585 } 586 587 switch(index) { 588 /* ACPI ivars */ 589 case ACPI_IVAR_HANDLE: 590 *(ACPI_HANDLE *)result = ad->ad_handle; 591 break; 592 case ACPI_IVAR_MAGIC: 593 *(int *)result = ad->ad_magic; 594 break; 595 case ACPI_IVAR_PRIVATE: 596 *(void **)result = ad->ad_private; 597 break; 598 599 /* ISA compatibility */ 600 case ISA_IVAR_VENDORID: 601 case ISA_IVAR_SERIAL: 602 case ISA_IVAR_COMPATID: 603 *(int *)result = -1; 604 break; 605 606 case ISA_IVAR_LOGICALID: 607 *(int *)result = acpi_isa_get_logicalid(child); 608 break; 609 610 default: 611 return(ENOENT); 612 } 613 return(0); 614 } 615 616 static int 617 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 618 { 619 struct acpi_device *ad; 620 621 if ((ad = device_get_ivars(child)) == NULL) { 622 printf("device has no ivars\n"); 623 return(ENOENT); 624 } 625 626 switch(index) { 627 /* ACPI ivars */ 628 case ACPI_IVAR_HANDLE: 629 ad->ad_handle = (ACPI_HANDLE)value; 630 break; 631 case ACPI_IVAR_MAGIC: 632 ad->ad_magic = (int )value; 633 break; 634 case ACPI_IVAR_PRIVATE: 635 ad->ad_private = (void *)value; 636 break; 637 638 default: 639 panic("bad ivar write request (%d)", index); 640 return(ENOENT); 641 } 642 return(0); 643 } 644 645 /* 646 * Handle child resource allocation/removal 647 */ 648 static int 649 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 650 { 651 struct acpi_device *ad = device_get_ivars(child); 652 struct resource_list *rl = &ad->ad_rl; 653 654 resource_list_add(rl, type, rid, start, start + count -1, count); 655 656 return(0); 657 } 658 659 static int 660 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 661 { 662 struct acpi_device *ad = device_get_ivars(child); 663 struct resource_list *rl = &ad->ad_rl; 664 struct resource_list_entry *rle; 665 666 rle = resource_list_find(rl, type, rid); 667 if (!rle) 668 return(ENOENT); 669 670 if (startp) 671 *startp = rle->start; 672 if (countp) 673 *countp = rle->count; 674 675 return(0); 676 } 677 678 static struct resource * 679 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 680 u_long start, u_long end, u_long count, u_int flags) 681 { 682 struct acpi_device *ad = device_get_ivars(child); 683 struct resource_list *rl = &ad->ad_rl; 684 685 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 686 } 687 688 static int 689 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 690 { 691 struct acpi_device *ad = device_get_ivars(child); 692 struct resource_list *rl = &ad->ad_rl; 693 694 return(resource_list_release(rl, bus, child, type, rid, r)); 695 } 696 697 /* 698 * Handle ISA-like devices probing for a PnP ID to match. 699 */ 700 #define PNP_EISAID(s) \ 701 ((((s[0] - '@') & 0x1f) << 2) \ 702 | (((s[1] - '@') & 0x18) >> 3) \ 703 | (((s[1] - '@') & 0x07) << 13) \ 704 | (((s[2] - '@') & 0x1f) << 8) \ 705 | (PNP_HEXTONUM(s[4]) << 16) \ 706 | (PNP_HEXTONUM(s[3]) << 20) \ 707 | (PNP_HEXTONUM(s[6]) << 24) \ 708 | (PNP_HEXTONUM(s[5]) << 28)) 709 710 static u_int32_t 711 acpi_isa_get_logicalid(device_t dev) 712 { 713 ACPI_HANDLE h; 714 ACPI_DEVICE_INFO devinfo; 715 ACPI_STATUS error; 716 u_int32_t pnpid; 717 ACPI_LOCK_DECL; 718 719 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 720 721 pnpid = 0; 722 ACPI_LOCK; 723 724 /* fetch and validate the HID */ 725 if ((h = acpi_get_handle(dev)) == NULL) 726 goto out; 727 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 728 goto out; 729 if (!(devinfo.Valid & ACPI_VALID_HID)) 730 goto out; 731 732 pnpid = PNP_EISAID(devinfo.HardwareId); 733 out: 734 ACPI_UNLOCK; 735 return_VALUE(pnpid); 736 } 737 738 static u_int32_t 739 acpi_isa_get_compatid(device_t dev) 740 { 741 ACPI_HANDLE h; 742 ACPI_DEVICE_INFO devinfo; 743 ACPI_STATUS error; 744 u_int32_t pnpid; 745 ACPI_LOCK_DECL; 746 747 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 748 749 pnpid = 0; 750 ACPI_LOCK; 751 752 /* fetch and validate the HID */ 753 if ((h = acpi_get_handle(dev)) == NULL) 754 goto out; 755 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 756 goto out; 757 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid))) 758 goto out; 759 760 out: 761 ACPI_UNLOCK; 762 return_VALUE(pnpid); 763 } 764 765 766 static int 767 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 768 { 769 int result; 770 u_int32_t lid, cid; 771 772 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 773 774 /* 775 * ISA-style drivers attached to ACPI may persist and 776 * probe manually if we return ENOENT. We never want 777 * that to happen, so don't ever return it. 778 */ 779 result = ENXIO; 780 781 /* scan the supplied IDs for a match */ 782 lid = acpi_isa_get_logicalid(child); 783 cid = acpi_isa_get_compatid(child); 784 while (ids && ids->ip_id) { 785 if (lid == ids->ip_id || cid == ids->ip_id) { 786 result = 0; 787 goto out; 788 } 789 ids++; 790 } 791 out: 792 return_VALUE(result); 793 } 794 795 /* 796 * Scan relevant portions of the ACPI namespace and attach child devices. 797 * 798 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 799 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 800 */ 801 static void 802 acpi_probe_children(device_t bus) 803 { 804 ACPI_HANDLE parent; 805 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 806 int i; 807 808 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 809 ACPI_ASSERTLOCK; 810 811 /* 812 * Create any static children by calling device identify methods. 813 */ 814 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 815 bus_generic_probe(bus); 816 817 /* 818 * Scan the namespace and insert placeholders for all the devices that 819 * we find. 820 * 821 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 822 * we want to create nodes for all devices, not just those that are currently 823 * present. (This assumes that we don't want to create/remove devices as they 824 * appear, which might be smarter.) 825 */ 826 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 827 for (i = 0; scopes[i] != NULL; i++) 828 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent))) 829 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 830 831 /* 832 * Scan all of the child devices we have created and let them probe/attach. 833 */ 834 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 835 bus_generic_attach(bus); 836 837 /* 838 * Some of these children may have attached others as part of their attach 839 * process (eg. the root PCI bus driver), so rescan. 840 */ 841 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 842 bus_generic_attach(bus); 843 844 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 845 return_VOID; 846 } 847 848 /* 849 * Evaluate a child device and determine whether we might attach a device to 850 * it. 851 */ 852 static ACPI_STATUS 853 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 854 { 855 ACPI_OBJECT_TYPE type; 856 device_t child, bus = (device_t)context; 857 858 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 859 860 /* 861 * Skip this device if we think we'll have trouble with it. 862 */ 863 if (acpi_avoid(handle)) 864 return_ACPI_STATUS(AE_OK); 865 866 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 867 switch(type) { 868 case ACPI_TYPE_DEVICE: 869 case ACPI_TYPE_PROCESSOR: 870 case ACPI_TYPE_THERMAL: 871 case ACPI_TYPE_POWER: 872 if (acpi_disabled("children")) 873 break; 874 /* 875 * Create a placeholder device for this node. Sort the placeholder 876 * so that the probe/attach passes will run breadth-first. 877 */ 878 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 879 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 880 if (child == NULL) 881 break; 882 acpi_set_handle(child, handle); 883 884 /* 885 * Check that the device is present. If it's not present, 886 * leave it disabled (so that we have a device_t attached to 887 * the handle, but we don't probe it). 888 */ 889 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 890 device_disable(child); 891 break; 892 } 893 894 /* 895 * Get the device's resource settings and attach them. 896 * Note that if the device has _PRS but no _CRS, we need 897 * to decide when it's appropriate to try to configure the 898 * device. Ignore the return value here; it's OK for the 899 * device not to have any resources. 900 */ 901 acpi_parse_resources(child, handle, &acpi_res_parse_set); 902 903 /* if we're debugging, probe/attach now rather than later */ 904 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 905 break; 906 } 907 } 908 return_ACPI_STATUS(AE_OK); 909 } 910 911 static void 912 acpi_shutdown_pre_sync(void *arg, int howto) 913 { 914 915 struct acpi_softc *sc = arg; 916 917 ACPI_ASSERTLOCK; 918 919 /* 920 * Disable all ACPI events before soft off, otherwise the system 921 * will be turned on again on some laptops. 922 * 923 * XXX this should probably be restricted to masking some events just 924 * before powering down, since we may still need ACPI during the 925 * shutdown process. 926 */ 927 if (sc->acpi_disable_on_poweroff) 928 acpi_Disable(sc); 929 } 930 931 static void 932 acpi_shutdown_final(void *arg, int howto) 933 { 934 ACPI_STATUS status; 935 936 ACPI_ASSERTLOCK; 937 938 if (howto & RB_POWEROFF) { 939 printf("Power system off using ACPI...\n"); 940 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) { 941 printf("AcpiEnterSleepStatePrep failed - %s\n", 942 AcpiFormatException(status)); 943 return; 944 } 945 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) { 946 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 947 } else { 948 DELAY(1000000); 949 printf("ACPI power-off failed - timeout\n"); 950 } 951 } else { 952 printf("Terminate ACPI\n"); 953 AcpiTerminate(); 954 } 955 } 956 957 static void 958 acpi_enable_fixed_events(struct acpi_softc *sc) 959 { 960 static int first_time = 1; 961 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 962 963 ACPI_ASSERTLOCK; 964 965 /* Enable and clear fixed events and install handlers. */ 966 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 967 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0); 968 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 969 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 970 acpi_eventhandler_power_button_for_sleep, sc); 971 if (first_time) { 972 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 973 } 974 } 975 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 976 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0); 977 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 978 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 979 acpi_eventhandler_sleep_button_for_sleep, sc); 980 if (first_time) { 981 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 982 } 983 } 984 985 first_time = 0; 986 } 987 988 /* 989 * Returns true if the device is actually present and should 990 * be attached to. This requires the present, enabled, UI-visible 991 * and diagnostics-passed bits to be set. 992 */ 993 BOOLEAN 994 acpi_DeviceIsPresent(device_t dev) 995 { 996 ACPI_HANDLE h; 997 ACPI_DEVICE_INFO devinfo; 998 ACPI_STATUS error; 999 1000 ACPI_ASSERTLOCK; 1001 1002 if ((h = acpi_get_handle(dev)) == NULL) 1003 return(FALSE); 1004 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1005 return(FALSE); 1006 /* if no _STA method, must be present */ 1007 if (!(devinfo.Valid & ACPI_VALID_STA)) 1008 return(TRUE); 1009 /* return true for 'present' and 'functioning' */ 1010 if ((devinfo.CurrentStatus & 0x9) == 0x9) 1011 return(TRUE); 1012 return(FALSE); 1013 } 1014 1015 /* 1016 * Returns true if the battery is actually present and inserted. 1017 */ 1018 BOOLEAN 1019 acpi_BatteryIsPresent(device_t dev) 1020 { 1021 ACPI_HANDLE h; 1022 ACPI_DEVICE_INFO devinfo; 1023 ACPI_STATUS error; 1024 1025 ACPI_ASSERTLOCK; 1026 1027 if ((h = acpi_get_handle(dev)) == NULL) 1028 return(FALSE); 1029 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1030 return(FALSE); 1031 /* if no _STA method, must be present */ 1032 if (!(devinfo.Valid & ACPI_VALID_STA)) 1033 return(TRUE); 1034 /* return true for 'present' and 'functioning' */ 1035 if ((devinfo.CurrentStatus & 0x19) == 0x19) 1036 return(TRUE); 1037 return(FALSE); 1038 } 1039 1040 /* 1041 * Match a HID string against a device 1042 */ 1043 BOOLEAN 1044 acpi_MatchHid(device_t dev, char *hid) 1045 { 1046 ACPI_HANDLE h; 1047 ACPI_DEVICE_INFO devinfo; 1048 ACPI_STATUS error; 1049 int cid; 1050 1051 ACPI_ASSERTLOCK; 1052 1053 if (hid == NULL) 1054 return(FALSE); 1055 if ((h = acpi_get_handle(dev)) == NULL) 1056 return(FALSE); 1057 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1058 return(FALSE); 1059 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 1060 return(TRUE); 1061 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid))) 1062 return(FALSE); 1063 if (cid == PNP_EISAID(hid)) 1064 return(TRUE); 1065 return(FALSE); 1066 } 1067 1068 /* 1069 * Return the handle of a named object within our scope, ie. that of (parent) 1070 * or one if its parents. 1071 */ 1072 ACPI_STATUS 1073 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1074 { 1075 ACPI_HANDLE r; 1076 ACPI_STATUS status; 1077 1078 ACPI_ASSERTLOCK; 1079 1080 /* walk back up the tree to the root */ 1081 for (;;) { 1082 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) { 1083 *result = r; 1084 return(AE_OK); 1085 } 1086 if (status != AE_NOT_FOUND) 1087 return(AE_OK); 1088 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1089 return(AE_NOT_FOUND); 1090 parent = r; 1091 } 1092 } 1093 1094 /* 1095 * Allocate a buffer with a preset data size. 1096 */ 1097 ACPI_BUFFER * 1098 acpi_AllocBuffer(int size) 1099 { 1100 ACPI_BUFFER *buf; 1101 1102 buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_INTWAIT); 1103 buf->Length = size; 1104 buf->Pointer = (void *)(buf + 1); 1105 return(buf); 1106 } 1107 1108 /* 1109 * Evaluate a path that should return an integer. 1110 */ 1111 ACPI_STATUS 1112 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1113 { 1114 ACPI_STATUS error; 1115 ACPI_BUFFER buf; 1116 ACPI_OBJECT param; 1117 1118 ACPI_ASSERTLOCK; 1119 1120 if (handle == NULL) 1121 handle = ACPI_ROOT_OBJECT; 1122 1123 /* 1124 * Assume that what we've been pointed at is an Integer object, or 1125 * a method that will return an Integer. 1126 */ 1127 buf.Pointer = ¶m; 1128 buf.Length = sizeof(param); 1129 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1130 if (param.Type == ACPI_TYPE_INTEGER) { 1131 *number = param.Integer.Value; 1132 } else { 1133 error = AE_TYPE; 1134 } 1135 } 1136 1137 /* 1138 * In some applications, a method that's expected to return an Integer 1139 * may instead return a Buffer (probably to simplify some internal 1140 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1141 * convert it into an Integer as best we can. 1142 * 1143 * This is a hack. 1144 */ 1145 if (error == AE_BUFFER_OVERFLOW) { 1146 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1147 error = AE_NO_MEMORY; 1148 } else { 1149 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1150 error = acpi_ConvertBufferToInteger(&buf, number); 1151 } 1152 } 1153 AcpiOsFree(buf.Pointer); 1154 } 1155 return(error); 1156 } 1157 1158 ACPI_STATUS 1159 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1160 { 1161 ACPI_OBJECT *p; 1162 int i; 1163 1164 p = (ACPI_OBJECT *)bufp->Pointer; 1165 if (p->Type == ACPI_TYPE_INTEGER) { 1166 *number = p->Integer.Value; 1167 return(AE_OK); 1168 } 1169 if (p->Type != ACPI_TYPE_BUFFER) 1170 return(AE_TYPE); 1171 if (p->Buffer.Length > sizeof(int)) 1172 return(AE_BAD_DATA); 1173 *number = 0; 1174 for (i = 0; i < p->Buffer.Length; i++) 1175 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1176 return(AE_OK); 1177 } 1178 1179 /* 1180 * Iterate over the elements of an a package object, calling the supplied 1181 * function for each element. 1182 * 1183 * XXX possible enhancement might be to abort traversal on error. 1184 */ 1185 ACPI_STATUS 1186 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1187 { 1188 ACPI_OBJECT *comp; 1189 int i; 1190 1191 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1192 return(AE_BAD_PARAMETER); 1193 1194 /* iterate over components */ 1195 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1196 func(comp, arg); 1197 1198 return(AE_OK); 1199 } 1200 1201 /* 1202 * Find the (index)th resource object in a set. 1203 */ 1204 ACPI_STATUS 1205 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1206 { 1207 ACPI_RESOURCE *rp; 1208 int i; 1209 1210 rp = (ACPI_RESOURCE *)buf->Pointer; 1211 i = index; 1212 while (i-- > 0) { 1213 /* range check */ 1214 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1215 return(AE_BAD_PARAMETER); 1216 /* check for terminator */ 1217 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1218 (rp->Length == 0)) 1219 return(AE_NOT_FOUND); 1220 rp = ACPI_RESOURCE_NEXT(rp); 1221 } 1222 if (resp != NULL) 1223 *resp = rp; 1224 return(AE_OK); 1225 } 1226 1227 /* 1228 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1229 * 1230 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1231 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1232 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1233 * resources. 1234 */ 1235 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1236 1237 ACPI_STATUS 1238 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1239 { 1240 ACPI_RESOURCE *rp; 1241 void *newp; 1242 1243 /* 1244 * Initialise the buffer if necessary. 1245 */ 1246 if (buf->Pointer == NULL) { 1247 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1248 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1249 return(AE_NO_MEMORY); 1250 rp = (ACPI_RESOURCE *)buf->Pointer; 1251 rp->Id = ACPI_RSTYPE_END_TAG; 1252 rp->Length = 0; 1253 } 1254 if (res == NULL) 1255 return(AE_OK); 1256 1257 /* 1258 * Scan the current buffer looking for the terminator. 1259 * This will either find the terminator or hit the end 1260 * of the buffer and return an error. 1261 */ 1262 rp = (ACPI_RESOURCE *)buf->Pointer; 1263 for (;;) { 1264 /* range check, don't go outside the buffer */ 1265 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1266 return(AE_BAD_PARAMETER); 1267 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1268 (rp->Length == 0)) { 1269 break; 1270 } 1271 rp = ACPI_RESOURCE_NEXT(rp); 1272 } 1273 1274 /* 1275 * Check the size of the buffer and expand if required. 1276 * 1277 * Required size is: 1278 * size of existing resources before terminator + 1279 * size of new resource and header + 1280 * size of terminator. 1281 * 1282 * Note that this loop should really only run once, unless 1283 * for some reason we are stuffing a *really* huge resource. 1284 */ 1285 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1286 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1287 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1288 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1289 return(AE_NO_MEMORY); 1290 bcopy(buf->Pointer, newp, buf->Length); 1291 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1292 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1293 AcpiOsFree(buf->Pointer); 1294 buf->Pointer = newp; 1295 buf->Length += buf->Length; 1296 } 1297 1298 /* 1299 * Insert the new resource. 1300 */ 1301 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1302 1303 /* 1304 * And add the terminator. 1305 */ 1306 rp = ACPI_RESOURCE_NEXT(rp); 1307 rp->Id = ACPI_RSTYPE_END_TAG; 1308 rp->Length = 0; 1309 1310 return(AE_OK); 1311 } 1312 1313 /* 1314 * Set interrupt model. 1315 */ 1316 ACPI_STATUS 1317 acpi_SetIntrModel(int model) 1318 { 1319 ACPI_OBJECT_LIST ArgList; 1320 ACPI_OBJECT Arg; 1321 1322 Arg.Type = ACPI_TYPE_INTEGER; 1323 Arg.Integer.Value = model; 1324 ArgList.Count = 1; 1325 ArgList.Pointer = &Arg; 1326 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1327 } 1328 1329 #define ACPI_MINIMUM_AWAKETIME 5 1330 1331 static void 1332 acpi_sleep_enable(void *arg) 1333 { 1334 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1335 } 1336 1337 /* 1338 * Set the system sleep state 1339 * 1340 * Currently we only support S1 and S5 1341 */ 1342 ACPI_STATUS 1343 acpi_SetSleepState(struct acpi_softc *sc, int state) 1344 { 1345 ACPI_STATUS status = AE_OK; 1346 UINT8 TypeA; 1347 UINT8 TypeB; 1348 1349 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1350 ACPI_ASSERTLOCK; 1351 1352 if (sc->acpi_sstate != ACPI_STATE_S0) 1353 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */ 1354 1355 if (sc->acpi_sleep_disabled) 1356 return_ACPI_STATUS(AE_OK); 1357 1358 switch (state) { 1359 case ACPI_STATE_S0: /* XXX only for testing */ 1360 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1361 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1362 } 1363 break; 1364 1365 case ACPI_STATE_S1: 1366 case ACPI_STATE_S2: 1367 case ACPI_STATE_S3: 1368 case ACPI_STATE_S4: 1369 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) { 1370 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status)); 1371 break; 1372 } 1373 1374 sc->acpi_sstate = state; 1375 sc->acpi_sleep_disabled = 1; 1376 1377 /* 1378 * Inform all devices that we are going to sleep. 1379 */ 1380 if (DEVICE_SUSPEND(root_bus) != 0) { 1381 /* 1382 * Re-wake the system. 1383 * 1384 * XXX note that a better two-pass approach with a 'veto' pass 1385 * followed by a "real thing" pass would be better, but the 1386 * current bus interface does not provide for this. 1387 */ 1388 DEVICE_RESUME(root_bus); 1389 return_ACPI_STATUS(AE_ERROR); 1390 } 1391 1392 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) { 1393 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1394 AcpiFormatException(status)); 1395 break; 1396 } 1397 1398 if (sc->acpi_sleep_delay > 0) { 1399 DELAY(sc->acpi_sleep_delay * 1000000); 1400 } 1401 1402 if (state != ACPI_STATE_S1) { 1403 acpi_sleep_machdep(sc, state); 1404 1405 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */ 1406 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) { 1407 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1408 } 1409 1410 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1411 if (state == ACPI_STATE_S4) { 1412 AcpiEnable(); 1413 } 1414 } else { 1415 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1416 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1417 break; 1418 } 1419 } 1420 AcpiLeaveSleepState((UINT8)state); 1421 DEVICE_RESUME(root_bus); 1422 sc->acpi_sstate = ACPI_STATE_S0; 1423 acpi_enable_fixed_events(sc); 1424 break; 1425 1426 case ACPI_STATE_S5: 1427 /* 1428 * Shut down cleanly and power off. This will call us back through the 1429 * shutdown handlers. 1430 */ 1431 shutdown_nice(RB_POWEROFF); 1432 break; 1433 1434 default: 1435 status = AE_BAD_PARAMETER; 1436 break; 1437 } 1438 1439 if (sc->acpi_sleep_disabled) 1440 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1441 1442 return_ACPI_STATUS(status); 1443 } 1444 1445 /* 1446 * Enable/Disable ACPI 1447 */ 1448 ACPI_STATUS 1449 acpi_Enable(struct acpi_softc *sc) 1450 { 1451 ACPI_STATUS status; 1452 u_int32_t flags; 1453 1454 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1455 ACPI_ASSERTLOCK; 1456 1457 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1458 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1459 if (!sc->acpi_enabled) { 1460 status = AcpiEnableSubsystem(flags); 1461 } else { 1462 status = AE_OK; 1463 } 1464 if (status == AE_OK) 1465 sc->acpi_enabled = 1; 1466 return_ACPI_STATUS(status); 1467 } 1468 1469 ACPI_STATUS 1470 acpi_Disable(struct acpi_softc *sc) 1471 { 1472 ACPI_STATUS status; 1473 1474 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1475 ACPI_ASSERTLOCK; 1476 1477 if (sc->acpi_enabled) { 1478 status = AcpiDisable(); 1479 } else { 1480 status = AE_OK; 1481 } 1482 if (status == AE_OK) 1483 sc->acpi_enabled = 0; 1484 return_ACPI_STATUS(status); 1485 } 1486 1487 /* 1488 * ACPI Event Handlers 1489 */ 1490 1491 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1492 1493 static void 1494 acpi_system_eventhandler_sleep(void *arg, int state) 1495 { 1496 ACPI_LOCK_DECL; 1497 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1498 1499 ACPI_LOCK; 1500 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1501 acpi_SetSleepState((struct acpi_softc *)arg, state); 1502 ACPI_UNLOCK; 1503 return_VOID; 1504 } 1505 1506 static void 1507 acpi_system_eventhandler_wakeup(void *arg, int state) 1508 { 1509 ACPI_LOCK_DECL; 1510 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1511 1512 /* Well, what to do? :-) */ 1513 1514 ACPI_LOCK; 1515 ACPI_UNLOCK; 1516 1517 return_VOID; 1518 } 1519 1520 /* 1521 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1522 */ 1523 UINT32 1524 acpi_eventhandler_power_button_for_sleep(void *context) 1525 { 1526 struct acpi_softc *sc = (struct acpi_softc *)context; 1527 1528 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1529 1530 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1531 1532 return_VALUE(ACPI_INTERRUPT_HANDLED); 1533 } 1534 1535 UINT32 1536 acpi_eventhandler_power_button_for_wakeup(void *context) 1537 { 1538 struct acpi_softc *sc = (struct acpi_softc *)context; 1539 1540 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1541 1542 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1543 1544 return_VALUE(ACPI_INTERRUPT_HANDLED); 1545 } 1546 1547 UINT32 1548 acpi_eventhandler_sleep_button_for_sleep(void *context) 1549 { 1550 struct acpi_softc *sc = (struct acpi_softc *)context; 1551 1552 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1553 1554 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1555 1556 return_VALUE(ACPI_INTERRUPT_HANDLED); 1557 } 1558 1559 UINT32 1560 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1561 { 1562 struct acpi_softc *sc = (struct acpi_softc *)context; 1563 1564 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1565 1566 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1567 1568 return_VALUE(ACPI_INTERRUPT_HANDLED); 1569 } 1570 1571 /* 1572 * XXX This is kinda ugly, and should not be here. 1573 */ 1574 struct acpi_staticbuf { 1575 ACPI_BUFFER buffer; 1576 char data[512]; 1577 }; 1578 1579 char * 1580 acpi_name(ACPI_HANDLE handle) 1581 { 1582 static struct acpi_staticbuf buf; 1583 1584 ACPI_ASSERTLOCK; 1585 1586 buf.buffer.Length = 512; 1587 buf.buffer.Pointer = &buf.data[0]; 1588 1589 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1590 return(buf.buffer.Pointer); 1591 return("(unknown path)"); 1592 } 1593 1594 /* 1595 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1596 * parts of the namespace. 1597 */ 1598 int 1599 acpi_avoid(ACPI_HANDLE handle) 1600 { 1601 char *cp, *env, *np; 1602 int len; 1603 1604 np = acpi_name(handle); 1605 if (*np == '\\') 1606 np++; 1607 if ((env = getenv("debug.acpi.avoid")) == NULL) 1608 return(0); 1609 1610 /* scan the avoid list checking for a match */ 1611 cp = env; 1612 for (;;) { 1613 while ((*cp != 0) && isspace(*cp)) 1614 cp++; 1615 if (*cp == 0) 1616 break; 1617 len = 0; 1618 while ((cp[len] != 0) && !isspace(cp[len])) 1619 len++; 1620 if (!strncmp(cp, np, len)) { 1621 freeenv(env); 1622 return(1); 1623 } 1624 cp += len; 1625 } 1626 freeenv(env); 1627 return(0); 1628 } 1629 1630 /* 1631 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1632 */ 1633 int 1634 acpi_disabled(char *subsys) 1635 { 1636 char *cp, *env; 1637 int len; 1638 1639 if ((env = getenv("debug.acpi.disable")) == NULL) 1640 return(0); 1641 if (!strcmp(env, "all")) { 1642 freeenv(env); 1643 return(1); 1644 } 1645 1646 /* scan the disable list checking for a match */ 1647 cp = env; 1648 for (;;) { 1649 while ((*cp != 0) && isspace(*cp)) 1650 cp++; 1651 if (*cp == 0) 1652 break; 1653 len = 0; 1654 while ((cp[len] != 0) && !isspace(cp[len])) 1655 len++; 1656 if (!strncmp(cp, subsys, len)) { 1657 freeenv(env); 1658 return(1); 1659 } 1660 cp += len; 1661 } 1662 freeenv(env); 1663 return(0); 1664 } 1665 1666 /* 1667 * Device wake capability enable/disable. 1668 */ 1669 void 1670 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1671 { 1672 ACPI_OBJECT_LIST ArgList; 1673 ACPI_OBJECT Arg; 1674 1675 /* 1676 * TBD: All Power Resources referenced by elements 2 through N 1677 * of the _PRW object are put into the ON state. 1678 */ 1679 1680 /* 1681 * enable/disable device wake function. 1682 */ 1683 1684 ArgList.Count = 1; 1685 ArgList.Pointer = &Arg; 1686 1687 Arg.Type = ACPI_TYPE_INTEGER; 1688 Arg.Integer.Value = enable; 1689 1690 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1691 } 1692 1693 void 1694 acpi_device_enable_wake_event(ACPI_HANDLE h) 1695 { 1696 struct acpi_softc *sc; 1697 ACPI_STATUS status; 1698 ACPI_BUFFER prw_buffer; 1699 ACPI_OBJECT *res; 1700 1701 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1702 1703 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) { 1704 return; 1705 } 1706 1707 /* 1708 * _PRW object is only required for devices that have the ability 1709 * to wake the system from a system sleeping state. 1710 */ 1711 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1712 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1713 if (ACPI_FAILURE(status)) { 1714 return; 1715 } 1716 1717 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1718 if (res == NULL) { 1719 return; 1720 } 1721 1722 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1723 goto out; 1724 } 1725 1726 /* 1727 * The element 1 of the _PRW object: 1728 * The lowest power system sleeping state that can be entered 1729 * while still providing wake functionality. 1730 * The sleeping state being entered must be greater or equal to 1731 * the power state declared in element 1 of the _PRW object. 1732 */ 1733 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) { 1734 goto out; 1735 } 1736 1737 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) { 1738 goto out; 1739 } 1740 1741 /* 1742 * The element 0 of the _PRW object: 1743 */ 1744 switch(res->Package.Elements[0].Type) { 1745 case ACPI_TYPE_INTEGER: 1746 /* 1747 * If the data type of this package element is numeric, then this 1748 * _PRW package element is the bit index in the GPEx_EN, in the 1749 * GPE blocks described in the FADT, of the enable bit that is 1750 * enabled for the wake event. 1751 */ 1752 1753 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value, 1754 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE); 1755 if (ACPI_FAILURE(status)) 1756 printf("%s: EnableEvent Failed\n", __func__); 1757 break; 1758 1759 case ACPI_TYPE_PACKAGE: 1760 /* XXX TBD */ 1761 1762 /* 1763 * If the data type of this package element is a package, then this 1764 * _PRW package element is itself a package containing two 1765 * elements. The first is an object reference to the GPE Block 1766 * device that contains the GPE that will be triggered by the wake 1767 * event. The second element is numeric and it contains the bit 1768 * index in the GPEx_EN, in the GPE Block referenced by the 1769 * first element in the package, of the enable bit that is enabled for 1770 * the wake event. 1771 * For example, if this field is a package then it is of the form: 1772 * Package() {\_SB.PCI0.ISA.GPE, 2} 1773 */ 1774 1775 break; 1776 1777 default: 1778 break; 1779 } 1780 1781 out: 1782 if (prw_buffer.Pointer != NULL) 1783 AcpiOsFree(prw_buffer.Pointer); 1784 return; 1785 } 1786 1787 /* 1788 * Control interface. 1789 * 1790 * We multiplex ioctls for all participating ACPI devices here. Individual 1791 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1792 * interface to make their handlers visible. 1793 */ 1794 struct acpi_ioctl_hook 1795 { 1796 TAILQ_ENTRY(acpi_ioctl_hook) link; 1797 u_long cmd; 1798 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1799 void *arg; 1800 }; 1801 1802 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1803 static int acpi_ioctl_hooks_initted; 1804 1805 /* 1806 * Register an ioctl handler. 1807 */ 1808 int 1809 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1810 { 1811 struct acpi_ioctl_hook *hp; 1812 1813 hp = malloc(sizeof(*hp), M_ACPIDEV, M_INTWAIT); 1814 hp->cmd = cmd; 1815 hp->fn = fn; 1816 hp->arg = arg; 1817 if (acpi_ioctl_hooks_initted == 0) { 1818 TAILQ_INIT(&acpi_ioctl_hooks); 1819 acpi_ioctl_hooks_initted = 1; 1820 } 1821 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1822 return(0); 1823 } 1824 1825 /* 1826 * Deregister an ioctl handler. 1827 */ 1828 void 1829 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1830 { 1831 struct acpi_ioctl_hook *hp; 1832 1833 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1834 if ((hp->cmd == cmd) && (hp->fn == fn)) 1835 break; 1836 1837 if (hp != NULL) { 1838 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1839 free(hp, M_ACPIDEV); 1840 } 1841 } 1842 1843 static int 1844 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 1845 { 1846 return(0); 1847 } 1848 1849 static int 1850 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 1851 { 1852 return(0); 1853 } 1854 1855 static int 1856 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 1857 { 1858 struct acpi_softc *sc; 1859 struct acpi_ioctl_hook *hp; 1860 int error, xerror, state; 1861 ACPI_LOCK_DECL; 1862 1863 ACPI_LOCK; 1864 1865 error = state = 0; 1866 sc = dev->si_drv1; 1867 1868 /* 1869 * Scan the list of registered ioctls, looking for handlers. 1870 */ 1871 if (acpi_ioctl_hooks_initted) { 1872 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1873 if (hp->cmd == cmd) { 1874 xerror = hp->fn(cmd, addr, hp->arg); 1875 if (xerror != 0) 1876 error = xerror; 1877 goto out; 1878 } 1879 } 1880 } 1881 1882 /* 1883 * Core ioctls are not permitted for non-writable user. 1884 * Currently, other ioctls just fetch information. 1885 * Not changing system behavior. 1886 */ 1887 if(!(flag & FWRITE)){ 1888 return EPERM; 1889 } 1890 1891 /* 1892 * Core system ioctls. 1893 */ 1894 switch (cmd) { 1895 case ACPIIO_ENABLE: 1896 if (ACPI_FAILURE(acpi_Enable(sc))) 1897 error = ENXIO; 1898 break; 1899 1900 case ACPIIO_DISABLE: 1901 if (ACPI_FAILURE(acpi_Disable(sc))) 1902 error = ENXIO; 1903 break; 1904 1905 case ACPIIO_SETSLPSTATE: 1906 if (!sc->acpi_enabled) { 1907 error = ENXIO; 1908 break; 1909 } 1910 state = *(int *)addr; 1911 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1912 acpi_SetSleepState(sc, state); 1913 } else { 1914 error = EINVAL; 1915 } 1916 break; 1917 1918 default: 1919 if (error == 0) 1920 error = EINVAL; 1921 break; 1922 } 1923 1924 out: 1925 ACPI_UNLOCK; 1926 return(error); 1927 } 1928 1929 static int 1930 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1931 { 1932 char sleep_state[4]; 1933 char buf[16]; 1934 int error; 1935 UINT8 state, TypeA, TypeB; 1936 1937 buf[0] = '\0'; 1938 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 1939 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 1940 sprintf(sleep_state, "S%d ", state); 1941 strcat(buf, sleep_state); 1942 } 1943 } 1944 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 1945 return(error); 1946 } 1947 1948 static int 1949 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1950 { 1951 char sleep_state[10]; 1952 int error; 1953 u_int new_state, old_state; 1954 1955 old_state = *(u_int *)oidp->oid_arg1; 1956 if (old_state > ACPI_S_STATES_MAX+1) { 1957 strcpy(sleep_state, "unknown"); 1958 } else { 1959 bzero(sleep_state, sizeof(sleep_state)); 1960 strncpy(sleep_state, sleep_state_names[old_state], 1961 sizeof(sleep_state_names[old_state])); 1962 } 1963 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1964 if (error == 0 && req->newptr != NULL) { 1965 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) { 1966 if (strncmp(sleep_state, sleep_state_names[new_state], 1967 sizeof(sleep_state)) == 0) 1968 break; 1969 } 1970 if (new_state <= ACPI_S_STATES_MAX+1) { 1971 if (new_state != old_state) { 1972 *(u_int *)oidp->oid_arg1 = new_state; 1973 } 1974 } else { 1975 error = EINVAL; 1976 } 1977 } 1978 return(error); 1979 } 1980 1981 #ifdef ACPI_DEBUG 1982 /* 1983 * Support for parsing debug options from the kernel environment. 1984 * 1985 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1986 * by specifying the names of the bits in the debug.acpi.layer and 1987 * debug.acpi.level environment variables. Bits may be unset by 1988 * prefixing the bit name with !. 1989 */ 1990 struct debugtag 1991 { 1992 char *name; 1993 UINT32 value; 1994 }; 1995 1996 static struct debugtag dbg_layer[] = { 1997 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1998 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1999 {"ACPI_EVENTS", ACPI_EVENTS}, 2000 {"ACPI_TABLES", ACPI_TABLES}, 2001 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2002 {"ACPI_PARSER", ACPI_PARSER}, 2003 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2004 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2005 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2006 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2007 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2008 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2009 2010 {"ACPI_BUS", ACPI_BUS}, 2011 {"ACPI_SYSTEM", ACPI_SYSTEM}, 2012 {"ACPI_POWER", ACPI_POWER}, 2013 {"ACPI_EC", ACPI_EC}, 2014 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2015 {"ACPI_BATTERY", ACPI_BATTERY}, 2016 {"ACPI_BUTTON", ACPI_BUTTON}, 2017 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2018 {"ACPI_THERMAL", ACPI_THERMAL}, 2019 {"ACPI_FAN", ACPI_FAN}, 2020 2021 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2022 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2023 {NULL, 0} 2024 }; 2025 2026 static struct debugtag dbg_level[] = { 2027 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2028 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2029 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2030 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2031 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2032 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2033 2034 /* Trace verbosity level 1 [Standard Trace Level] */ 2035 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2036 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2037 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2038 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2039 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2040 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2041 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2042 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2043 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2044 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2045 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2046 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2047 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2048 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2049 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2050 2051 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2052 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2053 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2054 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2055 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2056 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2057 2058 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2059 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2060 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2061 {"ACPI_LV_IO", ACPI_LV_IO}, 2062 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2063 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2064 2065 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2066 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2067 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2068 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2069 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2070 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2071 {NULL, 0} 2072 }; 2073 2074 static void 2075 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2076 { 2077 char *ep; 2078 int i, l; 2079 int set; 2080 2081 while (*cp) { 2082 if (isspace(*cp)) { 2083 cp++; 2084 continue; 2085 } 2086 ep = cp; 2087 while (*ep && !isspace(*ep)) 2088 ep++; 2089 if (*cp == '!') { 2090 set = 0; 2091 cp++; 2092 if (cp == ep) 2093 continue; 2094 } else { 2095 set = 1; 2096 } 2097 l = ep - cp; 2098 for (i = 0; tag[i].name != NULL; i++) { 2099 if (!strncmp(cp, tag[i].name, l)) { 2100 if (set) { 2101 *flag |= tag[i].value; 2102 } else { 2103 *flag &= ~tag[i].value; 2104 } 2105 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2106 } 2107 } 2108 cp = ep; 2109 } 2110 } 2111 2112 static void 2113 acpi_set_debugging(void *junk) 2114 { 2115 char *cp; 2116 2117 if (!cold) 2118 return; 2119 2120 AcpiDbgLayer = 0; 2121 AcpiDbgLevel = 0; 2122 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2123 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2124 freeenv(cp); 2125 } 2126 if ((cp = getenv("debug.acpi.level")) != NULL) { 2127 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2128 freeenv(cp); 2129 } 2130 2131 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 2132 } 2133 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 2134 #endif 2135 2136 static int 2137 acpi_pm_func(u_long cmd, void *arg, ...) 2138 { 2139 int state, acpi_state; 2140 int error; 2141 struct acpi_softc *sc; 2142 __va_list ap; 2143 2144 error = 0; 2145 switch (cmd) { 2146 case POWER_CMD_SUSPEND: 2147 sc = (struct acpi_softc *)arg; 2148 if (sc == NULL) { 2149 error = EINVAL; 2150 goto out; 2151 } 2152 2153 __va_start(ap, arg); 2154 state = __va_arg(ap, int); 2155 __va_end(ap); 2156 2157 switch (state) { 2158 case POWER_SLEEP_STATE_STANDBY: 2159 acpi_state = sc->acpi_standby_sx; 2160 break; 2161 case POWER_SLEEP_STATE_SUSPEND: 2162 acpi_state = sc->acpi_suspend_sx; 2163 break; 2164 case POWER_SLEEP_STATE_HIBERNATE: 2165 acpi_state = ACPI_STATE_S4; 2166 break; 2167 default: 2168 error = EINVAL; 2169 goto out; 2170 } 2171 2172 acpi_SetSleepState(sc, acpi_state); 2173 break; 2174 2175 default: 2176 error = EINVAL; 2177 goto out; 2178 } 2179 2180 out: 2181 return (error); 2182 } 2183 2184 static void 2185 acpi_pm_register(void *arg) 2186 { 2187 int error; 2188 2189 if (!cold) 2190 return; 2191 2192 if (!resource_int_value("acpi", 0, "disabled", &error) && 2193 (error != 0)) 2194 return; 2195 2196 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2197 } 2198 2199 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2200 2201