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 1.2 2003/11/09 02:22:34 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_autoq = 0, 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 __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 __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 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 501 "acpi"); 502 sc->acpi_dev_t->si_drv1 = sc; 503 504 #ifdef ACPI_DEBUGGER 505 debugpoint = getenv("debug.acpi.debugger"); 506 if (debugpoint) { 507 if (!strcmp(debugpoint, "running")) 508 acpi_EnterDebugger(); 509 freeenv(debugpoint); 510 } 511 #endif 512 513 #ifdef ACPI_USE_THREADS 514 if ((error = acpi_task_thread_init())) { 515 goto out; 516 } 517 #endif 518 519 if ((error = acpi_machdep_init(dev))) { 520 goto out; 521 } 522 523 /* Register ACPI again to pass the correct argument of pm_func. */ 524 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 525 526 if (!acpi_disabled("bus")) 527 acpi_probe_children(dev); 528 529 error = 0; 530 531 out: 532 ACPI_UNLOCK; 533 return_VALUE(error); 534 } 535 536 /* 537 * Handle a new device being added 538 */ 539 static device_t 540 acpi_add_child(device_t bus, int order, const char *name, int unit) 541 { 542 struct acpi_device *ad; 543 device_t child; 544 545 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 546 return(NULL); 547 bzero(ad, sizeof(*ad)); 548 549 resource_list_init(&ad->ad_rl); 550 551 child = device_add_child_ordered(bus, order, name, unit); 552 if (child != NULL) 553 device_set_ivars(child, ad); 554 return(child); 555 } 556 557 static int 558 acpi_print_child(device_t bus, device_t child) 559 { 560 struct acpi_device *adev = device_get_ivars(child); 561 struct resource_list *rl = &adev->ad_rl; 562 int retval = 0; 563 564 retval += bus_print_child_header(bus, child); 565 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 566 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 567 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 568 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 569 retval += bus_print_child_footer(bus, child); 570 571 return(retval); 572 } 573 574 575 /* 576 * Handle per-device ivars 577 */ 578 static int 579 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 580 { 581 struct acpi_device *ad; 582 583 if ((ad = device_get_ivars(child)) == NULL) { 584 printf("device has no ivars\n"); 585 return(ENOENT); 586 } 587 588 switch(index) { 589 /* ACPI ivars */ 590 case ACPI_IVAR_HANDLE: 591 *(ACPI_HANDLE *)result = ad->ad_handle; 592 break; 593 case ACPI_IVAR_MAGIC: 594 *(int *)result = ad->ad_magic; 595 break; 596 case ACPI_IVAR_PRIVATE: 597 *(void **)result = ad->ad_private; 598 break; 599 600 /* ISA compatibility */ 601 case ISA_IVAR_VENDORID: 602 case ISA_IVAR_SERIAL: 603 case ISA_IVAR_COMPATID: 604 *(int *)result = -1; 605 break; 606 607 case ISA_IVAR_LOGICALID: 608 *(int *)result = acpi_isa_get_logicalid(child); 609 break; 610 611 default: 612 return(ENOENT); 613 } 614 return(0); 615 } 616 617 static int 618 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 619 { 620 struct acpi_device *ad; 621 622 if ((ad = device_get_ivars(child)) == NULL) { 623 printf("device has no ivars\n"); 624 return(ENOENT); 625 } 626 627 switch(index) { 628 /* ACPI ivars */ 629 case ACPI_IVAR_HANDLE: 630 ad->ad_handle = (ACPI_HANDLE)value; 631 break; 632 case ACPI_IVAR_MAGIC: 633 ad->ad_magic = (int )value; 634 break; 635 case ACPI_IVAR_PRIVATE: 636 ad->ad_private = (void *)value; 637 break; 638 639 default: 640 panic("bad ivar write request (%d)", index); 641 return(ENOENT); 642 } 643 return(0); 644 } 645 646 /* 647 * Handle child resource allocation/removal 648 */ 649 static int 650 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 651 { 652 struct acpi_device *ad = device_get_ivars(child); 653 struct resource_list *rl = &ad->ad_rl; 654 655 resource_list_add(rl, type, rid, start, start + count -1, count); 656 657 return(0); 658 } 659 660 static int 661 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 662 { 663 struct acpi_device *ad = device_get_ivars(child); 664 struct resource_list *rl = &ad->ad_rl; 665 struct resource_list_entry *rle; 666 667 rle = resource_list_find(rl, type, rid); 668 if (!rle) 669 return(ENOENT); 670 671 if (startp) 672 *startp = rle->start; 673 if (countp) 674 *countp = rle->count; 675 676 return(0); 677 } 678 679 static struct resource * 680 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 681 u_long start, u_long end, u_long count, u_int flags) 682 { 683 struct acpi_device *ad = device_get_ivars(child); 684 struct resource_list *rl = &ad->ad_rl; 685 686 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 687 } 688 689 static int 690 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 691 { 692 struct acpi_device *ad = device_get_ivars(child); 693 struct resource_list *rl = &ad->ad_rl; 694 695 return(resource_list_release(rl, bus, child, type, rid, r)); 696 } 697 698 /* 699 * Handle ISA-like devices probing for a PnP ID to match. 700 */ 701 #define PNP_EISAID(s) \ 702 ((((s[0] - '@') & 0x1f) << 2) \ 703 | (((s[1] - '@') & 0x18) >> 3) \ 704 | (((s[1] - '@') & 0x07) << 13) \ 705 | (((s[2] - '@') & 0x1f) << 8) \ 706 | (PNP_HEXTONUM(s[4]) << 16) \ 707 | (PNP_HEXTONUM(s[3]) << 20) \ 708 | (PNP_HEXTONUM(s[6]) << 24) \ 709 | (PNP_HEXTONUM(s[5]) << 28)) 710 711 static u_int32_t 712 acpi_isa_get_logicalid(device_t dev) 713 { 714 ACPI_HANDLE h; 715 ACPI_DEVICE_INFO devinfo; 716 ACPI_STATUS error; 717 u_int32_t pnpid; 718 ACPI_LOCK_DECL; 719 720 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 721 722 pnpid = 0; 723 ACPI_LOCK; 724 725 /* fetch and validate the HID */ 726 if ((h = acpi_get_handle(dev)) == NULL) 727 goto out; 728 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 729 goto out; 730 if (!(devinfo.Valid & ACPI_VALID_HID)) 731 goto out; 732 733 pnpid = PNP_EISAID(devinfo.HardwareId); 734 out: 735 ACPI_UNLOCK; 736 return_VALUE(pnpid); 737 } 738 739 static u_int32_t 740 acpi_isa_get_compatid(device_t dev) 741 { 742 ACPI_HANDLE h; 743 ACPI_DEVICE_INFO devinfo; 744 ACPI_STATUS error; 745 u_int32_t pnpid; 746 ACPI_LOCK_DECL; 747 748 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 749 750 pnpid = 0; 751 ACPI_LOCK; 752 753 /* fetch and validate the HID */ 754 if ((h = acpi_get_handle(dev)) == NULL) 755 goto out; 756 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 757 goto out; 758 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid))) 759 goto out; 760 761 out: 762 ACPI_UNLOCK; 763 return_VALUE(pnpid); 764 } 765 766 767 static int 768 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 769 { 770 int result; 771 u_int32_t lid, cid; 772 773 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 774 775 /* 776 * ISA-style drivers attached to ACPI may persist and 777 * probe manually if we return ENOENT. We never want 778 * that to happen, so don't ever return it. 779 */ 780 result = ENXIO; 781 782 /* scan the supplied IDs for a match */ 783 lid = acpi_isa_get_logicalid(child); 784 cid = acpi_isa_get_compatid(child); 785 while (ids && ids->ip_id) { 786 if (lid == ids->ip_id || cid == ids->ip_id) { 787 result = 0; 788 goto out; 789 } 790 ids++; 791 } 792 out: 793 return_VALUE(result); 794 } 795 796 /* 797 * Scan relevant portions of the ACPI namespace and attach child devices. 798 * 799 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 800 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 801 */ 802 static void 803 acpi_probe_children(device_t bus) 804 { 805 ACPI_HANDLE parent; 806 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 807 int i; 808 809 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 810 ACPI_ASSERTLOCK; 811 812 /* 813 * Create any static children by calling device identify methods. 814 */ 815 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 816 bus_generic_probe(bus); 817 818 /* 819 * Scan the namespace and insert placeholders for all the devices that 820 * we find. 821 * 822 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 823 * we want to create nodes for all devices, not just those that are currently 824 * present. (This assumes that we don't want to create/remove devices as they 825 * appear, which might be smarter.) 826 */ 827 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 828 for (i = 0; scopes[i] != NULL; i++) 829 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent))) 830 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 831 832 /* 833 * Scan all of the child devices we have created and let them probe/attach. 834 */ 835 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 836 bus_generic_attach(bus); 837 838 /* 839 * Some of these children may have attached others as part of their attach 840 * process (eg. the root PCI bus driver), so rescan. 841 */ 842 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 843 bus_generic_attach(bus); 844 845 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 846 return_VOID; 847 } 848 849 /* 850 * Evaluate a child device and determine whether we might attach a device to 851 * it. 852 */ 853 static ACPI_STATUS 854 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 855 { 856 ACPI_OBJECT_TYPE type; 857 device_t child, bus = (device_t)context; 858 859 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 860 861 /* 862 * Skip this device if we think we'll have trouble with it. 863 */ 864 if (acpi_avoid(handle)) 865 return_ACPI_STATUS(AE_OK); 866 867 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 868 switch(type) { 869 case ACPI_TYPE_DEVICE: 870 case ACPI_TYPE_PROCESSOR: 871 case ACPI_TYPE_THERMAL: 872 case ACPI_TYPE_POWER: 873 if (acpi_disabled("children")) 874 break; 875 /* 876 * Create a placeholder device for this node. Sort the placeholder 877 * so that the probe/attach passes will run breadth-first. 878 */ 879 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 880 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 881 if (child == NULL) 882 break; 883 acpi_set_handle(child, handle); 884 885 /* 886 * Check that the device is present. If it's not present, 887 * leave it disabled (so that we have a device_t attached to 888 * the handle, but we don't probe it). 889 */ 890 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 891 device_disable(child); 892 break; 893 } 894 895 /* 896 * Get the device's resource settings and attach them. 897 * Note that if the device has _PRS but no _CRS, we need 898 * to decide when it's appropriate to try to configure the 899 * device. Ignore the return value here; it's OK for the 900 * device not to have any resources. 901 */ 902 acpi_parse_resources(child, handle, &acpi_res_parse_set); 903 904 /* if we're debugging, probe/attach now rather than later */ 905 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 906 break; 907 } 908 } 909 return_ACPI_STATUS(AE_OK); 910 } 911 912 static void 913 acpi_shutdown_pre_sync(void *arg, int howto) 914 { 915 916 struct acpi_softc *sc = arg; 917 918 ACPI_ASSERTLOCK; 919 920 /* 921 * Disable all ACPI events before soft off, otherwise the system 922 * will be turned on again on some laptops. 923 * 924 * XXX this should probably be restricted to masking some events just 925 * before powering down, since we may still need ACPI during the 926 * shutdown process. 927 */ 928 if (sc->acpi_disable_on_poweroff) 929 acpi_Disable(sc); 930 } 931 932 static void 933 acpi_shutdown_final(void *arg, int howto) 934 { 935 ACPI_STATUS status; 936 937 ACPI_ASSERTLOCK; 938 939 if (howto & RB_POWEROFF) { 940 printf("Power system off using ACPI...\n"); 941 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(acpi_off_state))) { 942 printf("AcpiEnterSleepStatePrep failed - %s\n", 943 AcpiFormatException(status)); 944 return; 945 } 946 if (ACPI_FAILURE(status = AcpiEnterSleepState(acpi_off_state))) { 947 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 948 } else { 949 DELAY(1000000); 950 printf("ACPI power-off failed - timeout\n"); 951 } 952 } else { 953 printf("Terminate ACPI\n"); 954 AcpiTerminate(); 955 } 956 } 957 958 static void 959 acpi_enable_fixed_events(struct acpi_softc *sc) 960 { 961 static int first_time = 1; 962 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 963 964 ACPI_ASSERTLOCK; 965 966 /* Enable and clear fixed events and install handlers. */ 967 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 968 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED, 0); 969 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 970 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 971 acpi_eventhandler_power_button_for_sleep, sc); 972 if (first_time) { 973 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 974 } 975 } 976 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 977 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED, 0); 978 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 979 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 980 acpi_eventhandler_sleep_button_for_sleep, sc); 981 if (first_time) { 982 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 983 } 984 } 985 986 first_time = 0; 987 } 988 989 /* 990 * Returns true if the device is actually present and should 991 * be attached to. This requires the present, enabled, UI-visible 992 * and diagnostics-passed bits to be set. 993 */ 994 BOOLEAN 995 acpi_DeviceIsPresent(device_t dev) 996 { 997 ACPI_HANDLE h; 998 ACPI_DEVICE_INFO devinfo; 999 ACPI_STATUS error; 1000 1001 ACPI_ASSERTLOCK; 1002 1003 if ((h = acpi_get_handle(dev)) == NULL) 1004 return(FALSE); 1005 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1006 return(FALSE); 1007 /* if no _STA method, must be present */ 1008 if (!(devinfo.Valid & ACPI_VALID_STA)) 1009 return(TRUE); 1010 /* return true for 'present' and 'functioning' */ 1011 if ((devinfo.CurrentStatus & 0x9) == 0x9) 1012 return(TRUE); 1013 return(FALSE); 1014 } 1015 1016 /* 1017 * Returns true if the battery is actually present and inserted. 1018 */ 1019 BOOLEAN 1020 acpi_BatteryIsPresent(device_t dev) 1021 { 1022 ACPI_HANDLE h; 1023 ACPI_DEVICE_INFO devinfo; 1024 ACPI_STATUS error; 1025 1026 ACPI_ASSERTLOCK; 1027 1028 if ((h = acpi_get_handle(dev)) == NULL) 1029 return(FALSE); 1030 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1031 return(FALSE); 1032 /* if no _STA method, must be present */ 1033 if (!(devinfo.Valid & ACPI_VALID_STA)) 1034 return(TRUE); 1035 /* return true for 'present' and 'functioning' */ 1036 if ((devinfo.CurrentStatus & 0x19) == 0x19) 1037 return(TRUE); 1038 return(FALSE); 1039 } 1040 1041 /* 1042 * Match a HID string against a device 1043 */ 1044 BOOLEAN 1045 acpi_MatchHid(device_t dev, char *hid) 1046 { 1047 ACPI_HANDLE h; 1048 ACPI_DEVICE_INFO devinfo; 1049 ACPI_STATUS error; 1050 int cid; 1051 1052 ACPI_ASSERTLOCK; 1053 1054 if (hid == NULL) 1055 return(FALSE); 1056 if ((h = acpi_get_handle(dev)) == NULL) 1057 return(FALSE); 1058 if (ACPI_FAILURE(error = AcpiGetObjectInfo(h, &devinfo))) 1059 return(FALSE); 1060 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 1061 return(TRUE); 1062 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid))) 1063 return(FALSE); 1064 if (cid == PNP_EISAID(hid)) 1065 return(TRUE); 1066 return(FALSE); 1067 } 1068 1069 /* 1070 * Return the handle of a named object within our scope, ie. that of (parent) 1071 * or one if its parents. 1072 */ 1073 ACPI_STATUS 1074 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1075 { 1076 ACPI_HANDLE r; 1077 ACPI_STATUS status; 1078 1079 ACPI_ASSERTLOCK; 1080 1081 /* walk back up the tree to the root */ 1082 for (;;) { 1083 if (ACPI_SUCCESS(status = AcpiGetHandle(parent, path, &r))) { 1084 *result = r; 1085 return(AE_OK); 1086 } 1087 if (status != AE_NOT_FOUND) 1088 return(AE_OK); 1089 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1090 return(AE_NOT_FOUND); 1091 parent = r; 1092 } 1093 } 1094 1095 /* 1096 * Allocate a buffer with a preset data size. 1097 */ 1098 ACPI_BUFFER * 1099 acpi_AllocBuffer(int size) 1100 { 1101 ACPI_BUFFER *buf; 1102 1103 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1104 return(NULL); 1105 buf->Length = size; 1106 buf->Pointer = (void *)(buf + 1); 1107 return(buf); 1108 } 1109 1110 /* 1111 * Evaluate a path that should return an integer. 1112 */ 1113 ACPI_STATUS 1114 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1115 { 1116 ACPI_STATUS error; 1117 ACPI_BUFFER buf; 1118 ACPI_OBJECT param; 1119 1120 ACPI_ASSERTLOCK; 1121 1122 if (handle == NULL) 1123 handle = ACPI_ROOT_OBJECT; 1124 1125 /* 1126 * Assume that what we've been pointed at is an Integer object, or 1127 * a method that will return an Integer. 1128 */ 1129 buf.Pointer = ¶m; 1130 buf.Length = sizeof(param); 1131 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1132 if (param.Type == ACPI_TYPE_INTEGER) { 1133 *number = param.Integer.Value; 1134 } else { 1135 error = AE_TYPE; 1136 } 1137 } 1138 1139 /* 1140 * In some applications, a method that's expected to return an Integer 1141 * may instead return a Buffer (probably to simplify some internal 1142 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1143 * convert it into an Integer as best we can. 1144 * 1145 * This is a hack. 1146 */ 1147 if (error == AE_BUFFER_OVERFLOW) { 1148 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1149 error = AE_NO_MEMORY; 1150 } else { 1151 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1152 error = acpi_ConvertBufferToInteger(&buf, number); 1153 } 1154 } 1155 AcpiOsFree(buf.Pointer); 1156 } 1157 return(error); 1158 } 1159 1160 ACPI_STATUS 1161 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1162 { 1163 ACPI_OBJECT *p; 1164 int i; 1165 1166 p = (ACPI_OBJECT *)bufp->Pointer; 1167 if (p->Type == ACPI_TYPE_INTEGER) { 1168 *number = p->Integer.Value; 1169 return(AE_OK); 1170 } 1171 if (p->Type != ACPI_TYPE_BUFFER) 1172 return(AE_TYPE); 1173 if (p->Buffer.Length > sizeof(int)) 1174 return(AE_BAD_DATA); 1175 *number = 0; 1176 for (i = 0; i < p->Buffer.Length; i++) 1177 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1178 return(AE_OK); 1179 } 1180 1181 /* 1182 * Iterate over the elements of an a package object, calling the supplied 1183 * function for each element. 1184 * 1185 * XXX possible enhancement might be to abort traversal on error. 1186 */ 1187 ACPI_STATUS 1188 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1189 { 1190 ACPI_OBJECT *comp; 1191 int i; 1192 1193 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1194 return(AE_BAD_PARAMETER); 1195 1196 /* iterate over components */ 1197 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1198 func(comp, arg); 1199 1200 return(AE_OK); 1201 } 1202 1203 /* 1204 * Find the (index)th resource object in a set. 1205 */ 1206 ACPI_STATUS 1207 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1208 { 1209 ACPI_RESOURCE *rp; 1210 int i; 1211 1212 rp = (ACPI_RESOURCE *)buf->Pointer; 1213 i = index; 1214 while (i-- > 0) { 1215 /* range check */ 1216 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1217 return(AE_BAD_PARAMETER); 1218 /* check for terminator */ 1219 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1220 (rp->Length == 0)) 1221 return(AE_NOT_FOUND); 1222 rp = ACPI_RESOURCE_NEXT(rp); 1223 } 1224 if (resp != NULL) 1225 *resp = rp; 1226 return(AE_OK); 1227 } 1228 1229 /* 1230 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1231 * 1232 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1233 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1234 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1235 * resources. 1236 */ 1237 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1238 1239 ACPI_STATUS 1240 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1241 { 1242 ACPI_RESOURCE *rp; 1243 void *newp; 1244 1245 /* 1246 * Initialise the buffer if necessary. 1247 */ 1248 if (buf->Pointer == NULL) { 1249 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1250 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1251 return(AE_NO_MEMORY); 1252 rp = (ACPI_RESOURCE *)buf->Pointer; 1253 rp->Id = ACPI_RSTYPE_END_TAG; 1254 rp->Length = 0; 1255 } 1256 if (res == NULL) 1257 return(AE_OK); 1258 1259 /* 1260 * Scan the current buffer looking for the terminator. 1261 * This will either find the terminator or hit the end 1262 * of the buffer and return an error. 1263 */ 1264 rp = (ACPI_RESOURCE *)buf->Pointer; 1265 for (;;) { 1266 /* range check, don't go outside the buffer */ 1267 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1268 return(AE_BAD_PARAMETER); 1269 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1270 (rp->Length == 0)) { 1271 break; 1272 } 1273 rp = ACPI_RESOURCE_NEXT(rp); 1274 } 1275 1276 /* 1277 * Check the size of the buffer and expand if required. 1278 * 1279 * Required size is: 1280 * size of existing resources before terminator + 1281 * size of new resource and header + 1282 * size of terminator. 1283 * 1284 * Note that this loop should really only run once, unless 1285 * for some reason we are stuffing a *really* huge resource. 1286 */ 1287 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1288 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1289 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1290 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1291 return(AE_NO_MEMORY); 1292 bcopy(buf->Pointer, newp, buf->Length); 1293 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1294 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1295 AcpiOsFree(buf->Pointer); 1296 buf->Pointer = newp; 1297 buf->Length += buf->Length; 1298 } 1299 1300 /* 1301 * Insert the new resource. 1302 */ 1303 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1304 1305 /* 1306 * And add the terminator. 1307 */ 1308 rp = ACPI_RESOURCE_NEXT(rp); 1309 rp->Id = ACPI_RSTYPE_END_TAG; 1310 rp->Length = 0; 1311 1312 return(AE_OK); 1313 } 1314 1315 /* 1316 * Set interrupt model. 1317 */ 1318 ACPI_STATUS 1319 acpi_SetIntrModel(int model) 1320 { 1321 ACPI_OBJECT_LIST ArgList; 1322 ACPI_OBJECT Arg; 1323 1324 Arg.Type = ACPI_TYPE_INTEGER; 1325 Arg.Integer.Value = model; 1326 ArgList.Count = 1; 1327 ArgList.Pointer = &Arg; 1328 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1329 } 1330 1331 #define ACPI_MINIMUM_AWAKETIME 5 1332 1333 static void 1334 acpi_sleep_enable(void *arg) 1335 { 1336 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1337 } 1338 1339 /* 1340 * Set the system sleep state 1341 * 1342 * Currently we only support S1 and S5 1343 */ 1344 ACPI_STATUS 1345 acpi_SetSleepState(struct acpi_softc *sc, int state) 1346 { 1347 ACPI_STATUS status = AE_OK; 1348 UINT8 TypeA; 1349 UINT8 TypeB; 1350 1351 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1352 ACPI_ASSERTLOCK; 1353 1354 if (sc->acpi_sstate != ACPI_STATE_S0) 1355 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */ 1356 1357 if (sc->acpi_sleep_disabled) 1358 return_ACPI_STATUS(AE_OK); 1359 1360 switch (state) { 1361 case ACPI_STATE_S0: /* XXX only for testing */ 1362 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1363 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1364 } 1365 break; 1366 1367 case ACPI_STATE_S1: 1368 case ACPI_STATE_S2: 1369 case ACPI_STATE_S3: 1370 case ACPI_STATE_S4: 1371 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) { 1372 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status)); 1373 break; 1374 } 1375 1376 sc->acpi_sstate = state; 1377 sc->acpi_sleep_disabled = 1; 1378 1379 /* 1380 * Inform all devices that we are going to sleep. 1381 */ 1382 if (DEVICE_SUSPEND(root_bus) != 0) { 1383 /* 1384 * Re-wake the system. 1385 * 1386 * XXX note that a better two-pass approach with a 'veto' pass 1387 * followed by a "real thing" pass would be better, but the 1388 * current bus interface does not provide for this. 1389 */ 1390 DEVICE_RESUME(root_bus); 1391 return_ACPI_STATUS(AE_ERROR); 1392 } 1393 1394 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) { 1395 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1396 AcpiFormatException(status)); 1397 break; 1398 } 1399 1400 if (sc->acpi_sleep_delay > 0) { 1401 DELAY(sc->acpi_sleep_delay * 1000000); 1402 } 1403 1404 if (state != ACPI_STATE_S1) { 1405 acpi_sleep_machdep(sc, state); 1406 1407 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */ 1408 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) { 1409 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1410 } 1411 1412 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1413 if (state == ACPI_STATE_S4) { 1414 AcpiEnable(); 1415 } 1416 } else { 1417 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1418 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1419 break; 1420 } 1421 } 1422 AcpiLeaveSleepState((UINT8)state); 1423 DEVICE_RESUME(root_bus); 1424 sc->acpi_sstate = ACPI_STATE_S0; 1425 acpi_enable_fixed_events(sc); 1426 break; 1427 1428 case ACPI_STATE_S5: 1429 /* 1430 * Shut down cleanly and power off. This will call us back through the 1431 * shutdown handlers. 1432 */ 1433 shutdown_nice(RB_POWEROFF); 1434 break; 1435 1436 default: 1437 status = AE_BAD_PARAMETER; 1438 break; 1439 } 1440 1441 if (sc->acpi_sleep_disabled) 1442 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1443 1444 return_ACPI_STATUS(status); 1445 } 1446 1447 /* 1448 * Enable/Disable ACPI 1449 */ 1450 ACPI_STATUS 1451 acpi_Enable(struct acpi_softc *sc) 1452 { 1453 ACPI_STATUS status; 1454 u_int32_t flags; 1455 1456 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1457 ACPI_ASSERTLOCK; 1458 1459 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1460 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1461 if (!sc->acpi_enabled) { 1462 status = AcpiEnableSubsystem(flags); 1463 } else { 1464 status = AE_OK; 1465 } 1466 if (status == AE_OK) 1467 sc->acpi_enabled = 1; 1468 return_ACPI_STATUS(status); 1469 } 1470 1471 ACPI_STATUS 1472 acpi_Disable(struct acpi_softc *sc) 1473 { 1474 ACPI_STATUS status; 1475 1476 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1477 ACPI_ASSERTLOCK; 1478 1479 if (sc->acpi_enabled) { 1480 status = AcpiDisable(); 1481 } else { 1482 status = AE_OK; 1483 } 1484 if (status == AE_OK) 1485 sc->acpi_enabled = 0; 1486 return_ACPI_STATUS(status); 1487 } 1488 1489 /* 1490 * ACPI Event Handlers 1491 */ 1492 1493 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1494 1495 static void 1496 acpi_system_eventhandler_sleep(void *arg, int state) 1497 { 1498 ACPI_LOCK_DECL; 1499 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1500 1501 ACPI_LOCK; 1502 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1503 acpi_SetSleepState((struct acpi_softc *)arg, state); 1504 ACPI_UNLOCK; 1505 return_VOID; 1506 } 1507 1508 static void 1509 acpi_system_eventhandler_wakeup(void *arg, int state) 1510 { 1511 ACPI_LOCK_DECL; 1512 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1513 1514 /* Well, what to do? :-) */ 1515 1516 ACPI_LOCK; 1517 ACPI_UNLOCK; 1518 1519 return_VOID; 1520 } 1521 1522 /* 1523 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1524 */ 1525 UINT32 1526 acpi_eventhandler_power_button_for_sleep(void *context) 1527 { 1528 struct acpi_softc *sc = (struct acpi_softc *)context; 1529 1530 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1531 1532 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1533 1534 return_VALUE(ACPI_INTERRUPT_HANDLED); 1535 } 1536 1537 UINT32 1538 acpi_eventhandler_power_button_for_wakeup(void *context) 1539 { 1540 struct acpi_softc *sc = (struct acpi_softc *)context; 1541 1542 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1543 1544 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1545 1546 return_VALUE(ACPI_INTERRUPT_HANDLED); 1547 } 1548 1549 UINT32 1550 acpi_eventhandler_sleep_button_for_sleep(void *context) 1551 { 1552 struct acpi_softc *sc = (struct acpi_softc *)context; 1553 1554 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1555 1556 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1557 1558 return_VALUE(ACPI_INTERRUPT_HANDLED); 1559 } 1560 1561 UINT32 1562 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1563 { 1564 struct acpi_softc *sc = (struct acpi_softc *)context; 1565 1566 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1567 1568 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1569 1570 return_VALUE(ACPI_INTERRUPT_HANDLED); 1571 } 1572 1573 /* 1574 * XXX This is kinda ugly, and should not be here. 1575 */ 1576 struct acpi_staticbuf { 1577 ACPI_BUFFER buffer; 1578 char data[512]; 1579 }; 1580 1581 char * 1582 acpi_name(ACPI_HANDLE handle) 1583 { 1584 static struct acpi_staticbuf buf; 1585 1586 ACPI_ASSERTLOCK; 1587 1588 buf.buffer.Length = 512; 1589 buf.buffer.Pointer = &buf.data[0]; 1590 1591 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1592 return(buf.buffer.Pointer); 1593 return("(unknown path)"); 1594 } 1595 1596 /* 1597 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1598 * parts of the namespace. 1599 */ 1600 int 1601 acpi_avoid(ACPI_HANDLE handle) 1602 { 1603 char *cp, *env, *np; 1604 int len; 1605 1606 np = acpi_name(handle); 1607 if (*np == '\\') 1608 np++; 1609 if ((env = getenv("debug.acpi.avoid")) == NULL) 1610 return(0); 1611 1612 /* scan the avoid list checking for a match */ 1613 cp = env; 1614 for (;;) { 1615 while ((*cp != 0) && isspace(*cp)) 1616 cp++; 1617 if (*cp == 0) 1618 break; 1619 len = 0; 1620 while ((cp[len] != 0) && !isspace(cp[len])) 1621 len++; 1622 if (!strncmp(cp, np, len)) { 1623 freeenv(env); 1624 return(1); 1625 } 1626 cp += len; 1627 } 1628 freeenv(env); 1629 return(0); 1630 } 1631 1632 /* 1633 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1634 */ 1635 int 1636 acpi_disabled(char *subsys) 1637 { 1638 char *cp, *env; 1639 int len; 1640 1641 if ((env = getenv("debug.acpi.disable")) == NULL) 1642 return(0); 1643 if (!strcmp(env, "all")) { 1644 freeenv(env); 1645 return(1); 1646 } 1647 1648 /* scan the disable list checking for a match */ 1649 cp = env; 1650 for (;;) { 1651 while ((*cp != 0) && isspace(*cp)) 1652 cp++; 1653 if (*cp == 0) 1654 break; 1655 len = 0; 1656 while ((cp[len] != 0) && !isspace(cp[len])) 1657 len++; 1658 if (!strncmp(cp, subsys, len)) { 1659 freeenv(env); 1660 return(1); 1661 } 1662 cp += len; 1663 } 1664 freeenv(env); 1665 return(0); 1666 } 1667 1668 /* 1669 * Device wake capability enable/disable. 1670 */ 1671 void 1672 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1673 { 1674 ACPI_OBJECT_LIST ArgList; 1675 ACPI_OBJECT Arg; 1676 1677 /* 1678 * TBD: All Power Resources referenced by elements 2 through N 1679 * of the _PRW object are put into the ON state. 1680 */ 1681 1682 /* 1683 * enable/disable device wake function. 1684 */ 1685 1686 ArgList.Count = 1; 1687 ArgList.Pointer = &Arg; 1688 1689 Arg.Type = ACPI_TYPE_INTEGER; 1690 Arg.Integer.Value = enable; 1691 1692 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1693 } 1694 1695 void 1696 acpi_device_enable_wake_event(ACPI_HANDLE h) 1697 { 1698 struct acpi_softc *sc; 1699 ACPI_STATUS status; 1700 ACPI_BUFFER prw_buffer; 1701 ACPI_OBJECT *res; 1702 1703 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1704 1705 if ((sc = devclass_get_softc(acpi_devclass, 0)) == NULL) { 1706 return; 1707 } 1708 1709 /* 1710 * _PRW object is only required for devices that have the ability 1711 * to wake the system from a system sleeping state. 1712 */ 1713 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1714 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1715 if (ACPI_FAILURE(status)) { 1716 return; 1717 } 1718 1719 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1720 if (res == NULL) { 1721 return; 1722 } 1723 1724 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1725 goto out; 1726 } 1727 1728 /* 1729 * The element 1 of the _PRW object: 1730 * The lowest power system sleeping state that can be entered 1731 * while still providing wake functionality. 1732 * The sleeping state being entered must be greater or equal to 1733 * the power state declared in element 1 of the _PRW object. 1734 */ 1735 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) { 1736 goto out; 1737 } 1738 1739 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) { 1740 goto out; 1741 } 1742 1743 /* 1744 * The element 0 of the _PRW object: 1745 */ 1746 switch(res->Package.Elements[0].Type) { 1747 case ACPI_TYPE_INTEGER: 1748 /* 1749 * If the data type of this package element is numeric, then this 1750 * _PRW package element is the bit index in the GPEx_EN, in the 1751 * GPE blocks described in the FADT, of the enable bit that is 1752 * enabled for the wake event. 1753 */ 1754 1755 status = AcpiEnableEvent(res->Package.Elements[0].Integer.Value, 1756 ACPI_EVENT_GPE, ACPI_EVENT_WAKE_ENABLE); 1757 if (ACPI_FAILURE(status)) 1758 printf("%s: EnableEvent Failed\n", __func__); 1759 break; 1760 1761 case ACPI_TYPE_PACKAGE: 1762 /* XXX TBD */ 1763 1764 /* 1765 * If the data type of this package element is a package, then this 1766 * _PRW package element is itself a package containing two 1767 * elements. The first is an object reference to the GPE Block 1768 * device that contains the GPE that will be triggered by the wake 1769 * event. The second element is numeric and it contains the bit 1770 * index in the GPEx_EN, in the GPE Block referenced by the 1771 * first element in the package, of the enable bit that is enabled for 1772 * the wake event. 1773 * For example, if this field is a package then it is of the form: 1774 * Package() {\_SB.PCI0.ISA.GPE, 2} 1775 */ 1776 1777 break; 1778 1779 default: 1780 break; 1781 } 1782 1783 out: 1784 if (prw_buffer.Pointer != NULL) 1785 AcpiOsFree(prw_buffer.Pointer); 1786 return; 1787 } 1788 1789 /* 1790 * Control interface. 1791 * 1792 * We multiplex ioctls for all participating ACPI devices here. Individual 1793 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1794 * interface to make their handlers visible. 1795 */ 1796 struct acpi_ioctl_hook 1797 { 1798 TAILQ_ENTRY(acpi_ioctl_hook) link; 1799 u_long cmd; 1800 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1801 void *arg; 1802 }; 1803 1804 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1805 static int acpi_ioctl_hooks_initted; 1806 1807 /* 1808 * Register an ioctl handler. 1809 */ 1810 int 1811 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1812 { 1813 struct acpi_ioctl_hook *hp; 1814 1815 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1816 return(ENOMEM); 1817 hp->cmd = cmd; 1818 hp->fn = fn; 1819 hp->arg = arg; 1820 if (acpi_ioctl_hooks_initted == 0) { 1821 TAILQ_INIT(&acpi_ioctl_hooks); 1822 acpi_ioctl_hooks_initted = 1; 1823 } 1824 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1825 return(0); 1826 } 1827 1828 /* 1829 * Deregister an ioctl handler. 1830 */ 1831 void 1832 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1833 { 1834 struct acpi_ioctl_hook *hp; 1835 1836 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1837 if ((hp->cmd == cmd) && (hp->fn == fn)) 1838 break; 1839 1840 if (hp != NULL) { 1841 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1842 free(hp, M_ACPIDEV); 1843 } 1844 } 1845 1846 static int 1847 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 1848 { 1849 return(0); 1850 } 1851 1852 static int 1853 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 1854 { 1855 return(0); 1856 } 1857 1858 static int 1859 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 1860 { 1861 struct acpi_softc *sc; 1862 struct acpi_ioctl_hook *hp; 1863 int error, xerror, state; 1864 ACPI_LOCK_DECL; 1865 1866 ACPI_LOCK; 1867 1868 error = state = 0; 1869 sc = dev->si_drv1; 1870 1871 /* 1872 * Scan the list of registered ioctls, looking for handlers. 1873 */ 1874 if (acpi_ioctl_hooks_initted) { 1875 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1876 if (hp->cmd == cmd) { 1877 xerror = hp->fn(cmd, addr, hp->arg); 1878 if (xerror != 0) 1879 error = xerror; 1880 goto out; 1881 } 1882 } 1883 } 1884 1885 /* 1886 * Core ioctls are not permitted for non-writable user. 1887 * Currently, other ioctls just fetch information. 1888 * Not changing system behavior. 1889 */ 1890 if(!(flag & FWRITE)){ 1891 return EPERM; 1892 } 1893 1894 /* 1895 * Core system ioctls. 1896 */ 1897 switch (cmd) { 1898 case ACPIIO_ENABLE: 1899 if (ACPI_FAILURE(acpi_Enable(sc))) 1900 error = ENXIO; 1901 break; 1902 1903 case ACPIIO_DISABLE: 1904 if (ACPI_FAILURE(acpi_Disable(sc))) 1905 error = ENXIO; 1906 break; 1907 1908 case ACPIIO_SETSLPSTATE: 1909 if (!sc->acpi_enabled) { 1910 error = ENXIO; 1911 break; 1912 } 1913 state = *(int *)addr; 1914 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1915 acpi_SetSleepState(sc, state); 1916 } else { 1917 error = EINVAL; 1918 } 1919 break; 1920 1921 default: 1922 if (error == 0) 1923 error = EINVAL; 1924 break; 1925 } 1926 1927 out: 1928 ACPI_UNLOCK; 1929 return(error); 1930 } 1931 1932 static int 1933 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1934 { 1935 char sleep_state[4]; 1936 char buf[16]; 1937 int error; 1938 UINT8 state, TypeA, TypeB; 1939 1940 buf[0] = '\0'; 1941 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 1942 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 1943 sprintf(sleep_state, "S%d ", state); 1944 strcat(buf, sleep_state); 1945 } 1946 } 1947 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 1948 return(error); 1949 } 1950 1951 static int 1952 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1953 { 1954 char sleep_state[10]; 1955 int error; 1956 u_int new_state, old_state; 1957 1958 old_state = *(u_int *)oidp->oid_arg1; 1959 if (old_state > ACPI_S_STATES_MAX+1) { 1960 strcpy(sleep_state, "unknown"); 1961 } else { 1962 bzero(sleep_state, sizeof(sleep_state)); 1963 strncpy(sleep_state, sleep_state_names[old_state], 1964 sizeof(sleep_state_names[old_state])); 1965 } 1966 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1967 if (error == 0 && req->newptr != NULL) { 1968 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) { 1969 if (strncmp(sleep_state, sleep_state_names[new_state], 1970 sizeof(sleep_state)) == 0) 1971 break; 1972 } 1973 if (new_state <= ACPI_S_STATES_MAX+1) { 1974 if (new_state != old_state) { 1975 *(u_int *)oidp->oid_arg1 = new_state; 1976 } 1977 } else { 1978 error = EINVAL; 1979 } 1980 } 1981 return(error); 1982 } 1983 1984 #ifdef ACPI_DEBUG 1985 /* 1986 * Support for parsing debug options from the kernel environment. 1987 * 1988 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1989 * by specifying the names of the bits in the debug.acpi.layer and 1990 * debug.acpi.level environment variables. Bits may be unset by 1991 * prefixing the bit name with !. 1992 */ 1993 struct debugtag 1994 { 1995 char *name; 1996 UINT32 value; 1997 }; 1998 1999 static struct debugtag dbg_layer[] = { 2000 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2001 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2002 {"ACPI_EVENTS", ACPI_EVENTS}, 2003 {"ACPI_TABLES", ACPI_TABLES}, 2004 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2005 {"ACPI_PARSER", ACPI_PARSER}, 2006 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2007 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2008 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2009 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2010 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2011 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2012 2013 {"ACPI_BUS", ACPI_BUS}, 2014 {"ACPI_SYSTEM", ACPI_SYSTEM}, 2015 {"ACPI_POWER", ACPI_POWER}, 2016 {"ACPI_EC", ACPI_EC}, 2017 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2018 {"ACPI_BATTERY", ACPI_BATTERY}, 2019 {"ACPI_BUTTON", ACPI_BUTTON}, 2020 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2021 {"ACPI_THERMAL", ACPI_THERMAL}, 2022 {"ACPI_FAN", ACPI_FAN}, 2023 2024 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2025 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2026 {NULL, 0} 2027 }; 2028 2029 static struct debugtag dbg_level[] = { 2030 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2031 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2032 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2033 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2034 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2035 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2036 2037 /* Trace verbosity level 1 [Standard Trace Level] */ 2038 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2039 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2040 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2041 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2042 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2043 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2044 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2045 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2046 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2047 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2048 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2049 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2050 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2051 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2052 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2053 2054 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2055 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2056 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2057 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2058 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2059 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2060 2061 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2062 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2063 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2064 {"ACPI_LV_IO", ACPI_LV_IO}, 2065 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2066 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2067 2068 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2069 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2070 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2071 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2072 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2073 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2074 {NULL, 0} 2075 }; 2076 2077 static void 2078 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2079 { 2080 char *ep; 2081 int i, l; 2082 int set; 2083 2084 while (*cp) { 2085 if (isspace(*cp)) { 2086 cp++; 2087 continue; 2088 } 2089 ep = cp; 2090 while (*ep && !isspace(*ep)) 2091 ep++; 2092 if (*cp == '!') { 2093 set = 0; 2094 cp++; 2095 if (cp == ep) 2096 continue; 2097 } else { 2098 set = 1; 2099 } 2100 l = ep - cp; 2101 for (i = 0; tag[i].name != NULL; i++) { 2102 if (!strncmp(cp, tag[i].name, l)) { 2103 if (set) { 2104 *flag |= tag[i].value; 2105 } else { 2106 *flag &= ~tag[i].value; 2107 } 2108 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2109 } 2110 } 2111 cp = ep; 2112 } 2113 } 2114 2115 static void 2116 acpi_set_debugging(void *junk) 2117 { 2118 char *cp; 2119 2120 if (!cold) 2121 return; 2122 2123 AcpiDbgLayer = 0; 2124 AcpiDbgLevel = 0; 2125 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2126 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2127 freeenv(cp); 2128 } 2129 if ((cp = getenv("debug.acpi.level")) != NULL) { 2130 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2131 freeenv(cp); 2132 } 2133 2134 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 2135 } 2136 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 2137 #endif 2138 2139 static int 2140 acpi_pm_func(u_long cmd, void *arg, ...) 2141 { 2142 int state, acpi_state; 2143 int error; 2144 struct acpi_softc *sc; 2145 __va_list ap; 2146 2147 error = 0; 2148 switch (cmd) { 2149 case POWER_CMD_SUSPEND: 2150 sc = (struct acpi_softc *)arg; 2151 if (sc == NULL) { 2152 error = EINVAL; 2153 goto out; 2154 } 2155 2156 __va_start(ap, arg); 2157 state = __va_arg(ap, int); 2158 __va_end(ap); 2159 2160 switch (state) { 2161 case POWER_SLEEP_STATE_STANDBY: 2162 acpi_state = sc->acpi_standby_sx; 2163 break; 2164 case POWER_SLEEP_STATE_SUSPEND: 2165 acpi_state = sc->acpi_suspend_sx; 2166 break; 2167 case POWER_SLEEP_STATE_HIBERNATE: 2168 acpi_state = ACPI_STATE_S4; 2169 break; 2170 default: 2171 error = EINVAL; 2172 goto out; 2173 } 2174 2175 acpi_SetSleepState(sc, acpi_state); 2176 break; 2177 2178 default: 2179 error = EINVAL; 2180 goto out; 2181 } 2182 2183 out: 2184 return (error); 2185 } 2186 2187 static void 2188 acpi_pm_register(void *arg) 2189 { 2190 int error; 2191 2192 if (!cold) 2193 return; 2194 2195 if (!resource_int_value("acpi", 0, "disabled", &error) && 2196 (error != 0)) 2197 return; 2198 2199 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2200 } 2201 2202 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2203 2204