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 1.7 2004/09/15 01:39:10 joerg 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 callout_init(&sc->acpi_sleep_timer); 336 337 #ifdef ACPI_DEBUGGER 338 debugpoint = getenv("debug.acpi.debugger"); 339 if (debugpoint) { 340 if (!strcmp(debugpoint, "spaces")) 341 acpi_EnterDebugger(); 342 freeenv(debugpoint); 343 } 344 #endif 345 346 /* 347 * Install the default address space handlers. 348 */ 349 error = ENXIO; 350 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 351 ACPI_ADR_SPACE_SYSTEM_MEMORY, 352 ACPI_DEFAULT_HANDLER, 353 NULL, NULL))) { 354 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 355 goto out; 356 } 357 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 358 ACPI_ADR_SPACE_SYSTEM_IO, 359 ACPI_DEFAULT_HANDLER, 360 NULL, NULL))) { 361 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 362 goto out; 363 } 364 if (ACPI_FAILURE(status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 365 ACPI_ADR_SPACE_PCI_CONFIG, 366 ACPI_DEFAULT_HANDLER, 367 NULL, NULL))) { 368 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 369 goto out; 370 } 371 372 /* 373 * Bring ACPI fully online. 374 * 375 * Note that some systems (specifically, those with namespace evaluation issues 376 * that require the avoidance of parts of the namespace) must avoid running _INI 377 * and _STA on everything, as well as dodging the final object init pass. 378 * 379 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 380 * 381 * XXX We should arrange for the object init pass after we have attached all our 382 * child devices, but on many systems it works here. 383 */ 384 #ifdef ACPI_DEBUGGER 385 debugpoint = getenv("debug.acpi.debugger"); 386 if (debugpoint) { 387 if (!strcmp(debugpoint, "enable")) 388 acpi_EnterDebugger(); 389 freeenv(debugpoint); 390 } 391 #endif 392 flags = 0; 393 if (testenv("debug.acpi.avoid")) 394 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 395 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 396 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 397 goto out; 398 } 399 400 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 401 device_printf(dev, "could not initialize ACPI objects: %s\n", AcpiFormatException(status)); 402 goto out; 403 } 404 405 /* 406 * Setup our sysctl tree. 407 * 408 * XXX: This doesn't check to make sure that none of these fail. 409 */ 410 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 411 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 412 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 413 device_get_name(dev), CTLFLAG_RD, 0, ""); 414 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 415 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 416 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 417 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 418 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 419 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 420 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 421 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 422 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 423 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 424 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 425 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 426 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 427 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 428 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 429 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 430 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 431 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 432 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 433 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 434 &sc->acpi_sleep_delay, 0, "sleep delay"); 435 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 436 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 437 &sc->acpi_s4bios, 0, "S4BIOS mode"); 438 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 439 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 440 &sc->acpi_verbose, 0, "verbose mode"); 441 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 442 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 443 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 444 sc->acpi_disable_on_poweroff = 1; 445 sc->acpi_sleep_delay = 0; 446 sc->acpi_s4bios = 1; 447 if (bootverbose) 448 sc->acpi_verbose = 1; 449 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 450 sc->acpi_verbose = 1; 451 freeenv(env); 452 } 453 454 /* 455 * Dispatch the default sleep state to devices. 456 * TBD: should be configured from userland policy manager. 457 */ 458 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 459 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 460 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 461 sc->acpi_standby_sx = ACPI_STATE_S1; 462 sc->acpi_suspend_sx = ACPI_STATE_S3; 463 464 acpi_enable_fixed_events(sc); 465 466 /* 467 * Scan the namespace and attach/initialise children. 468 */ 469 #ifdef ACPI_DEBUGGER 470 debugpoint = getenv("debug.acpi.debugger"); 471 if (debugpoint) { 472 if (!strcmp(debugpoint, "probe")) 473 acpi_EnterDebugger(); 474 freeenv(debugpoint); 475 } 476 #endif 477 478 /* 479 * Register our shutdown handlers 480 */ 481 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 482 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 483 484 /* 485 * Register our acpi event handlers. 486 * XXX should be configurable eg. via userland policy manager. 487 */ 488 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 489 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 490 491 /* 492 * Flag our initial states. 493 */ 494 sc->acpi_enabled = 1; 495 sc->acpi_sstate = ACPI_STATE_S0; 496 sc->acpi_sleep_disabled = 0; 497 498 /* 499 * Create the control device 500 */ 501 cdevsw_add(&acpi_cdevsw, 0, 0); 502 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 503 "acpi"); 504 sc->acpi_dev_t->si_drv1 = sc; 505 506 #ifdef ACPI_DEBUGGER 507 debugpoint = getenv("debug.acpi.debugger"); 508 if (debugpoint) { 509 if (!strcmp(debugpoint, "running")) 510 acpi_EnterDebugger(); 511 freeenv(debugpoint); 512 } 513 #endif 514 515 #ifdef ACPI_USE_THREADS 516 if ((error = acpi_task_thread_init())) { 517 goto out; 518 } 519 #endif 520 521 if ((error = acpi_machdep_init(dev))) { 522 goto out; 523 } 524 525 /* Register ACPI again to pass the correct argument of pm_func. */ 526 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 527 528 if (!acpi_disabled("bus")) 529 acpi_probe_children(dev); 530 531 error = 0; 532 533 out: 534 ACPI_UNLOCK; 535 return_VALUE(error); 536 } 537 538 /* 539 * Handle a new device being added 540 */ 541 static device_t 542 acpi_add_child(device_t bus, int order, const char *name, int unit) 543 { 544 struct acpi_device *ad; 545 device_t child; 546 547 ad = malloc(sizeof(*ad), M_ACPIDEV, M_INTWAIT | M_ZERO); 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 buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_INTWAIT); 1104 buf->Length = size; 1105 buf->Pointer = (void *)(buf + 1); 1106 return(buf); 1107 } 1108 1109 /* 1110 * Evaluate a path that should return an integer. 1111 */ 1112 ACPI_STATUS 1113 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1114 { 1115 ACPI_STATUS error; 1116 ACPI_BUFFER buf; 1117 ACPI_OBJECT param; 1118 1119 ACPI_ASSERTLOCK; 1120 1121 if (handle == NULL) 1122 handle = ACPI_ROOT_OBJECT; 1123 1124 /* 1125 * Assume that what we've been pointed at is an Integer object, or 1126 * a method that will return an Integer. 1127 */ 1128 buf.Pointer = ¶m; 1129 buf.Length = sizeof(param); 1130 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1131 if (param.Type == ACPI_TYPE_INTEGER) { 1132 *number = param.Integer.Value; 1133 } else { 1134 error = AE_TYPE; 1135 } 1136 } 1137 1138 /* 1139 * In some applications, a method that's expected to return an Integer 1140 * may instead return a Buffer (probably to simplify some internal 1141 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1142 * convert it into an Integer as best we can. 1143 * 1144 * This is a hack. 1145 */ 1146 if (error == AE_BUFFER_OVERFLOW) { 1147 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1148 error = AE_NO_MEMORY; 1149 } else { 1150 if (ACPI_SUCCESS(error = AcpiEvaluateObject(handle, path, NULL, &buf))) { 1151 error = acpi_ConvertBufferToInteger(&buf, number); 1152 } 1153 } 1154 AcpiOsFree(buf.Pointer); 1155 } 1156 return(error); 1157 } 1158 1159 ACPI_STATUS 1160 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1161 { 1162 ACPI_OBJECT *p; 1163 int i; 1164 1165 p = (ACPI_OBJECT *)bufp->Pointer; 1166 if (p->Type == ACPI_TYPE_INTEGER) { 1167 *number = p->Integer.Value; 1168 return(AE_OK); 1169 } 1170 if (p->Type != ACPI_TYPE_BUFFER) 1171 return(AE_TYPE); 1172 if (p->Buffer.Length > sizeof(int)) 1173 return(AE_BAD_DATA); 1174 *number = 0; 1175 for (i = 0; i < p->Buffer.Length; i++) 1176 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1177 return(AE_OK); 1178 } 1179 1180 /* 1181 * Iterate over the elements of an a package object, calling the supplied 1182 * function for each element. 1183 * 1184 * XXX possible enhancement might be to abort traversal on error. 1185 */ 1186 ACPI_STATUS 1187 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1188 { 1189 ACPI_OBJECT *comp; 1190 int i; 1191 1192 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1193 return(AE_BAD_PARAMETER); 1194 1195 /* iterate over components */ 1196 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1197 func(comp, arg); 1198 1199 return(AE_OK); 1200 } 1201 1202 /* 1203 * Find the (index)th resource object in a set. 1204 */ 1205 ACPI_STATUS 1206 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1207 { 1208 ACPI_RESOURCE *rp; 1209 int i; 1210 1211 rp = (ACPI_RESOURCE *)buf->Pointer; 1212 i = index; 1213 while (i-- > 0) { 1214 /* range check */ 1215 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1216 return(AE_BAD_PARAMETER); 1217 /* check for terminator */ 1218 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1219 (rp->Length == 0)) 1220 return(AE_NOT_FOUND); 1221 rp = ACPI_RESOURCE_NEXT(rp); 1222 } 1223 if (resp != NULL) 1224 *resp = rp; 1225 return(AE_OK); 1226 } 1227 1228 /* 1229 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1230 * 1231 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1232 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1233 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1234 * resources. 1235 */ 1236 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1237 1238 ACPI_STATUS 1239 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1240 { 1241 ACPI_RESOURCE *rp; 1242 void *newp; 1243 1244 /* 1245 * Initialise the buffer if necessary. 1246 */ 1247 if (buf->Pointer == NULL) { 1248 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1249 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1250 return(AE_NO_MEMORY); 1251 rp = (ACPI_RESOURCE *)buf->Pointer; 1252 rp->Id = ACPI_RSTYPE_END_TAG; 1253 rp->Length = 0; 1254 } 1255 if (res == NULL) 1256 return(AE_OK); 1257 1258 /* 1259 * Scan the current buffer looking for the terminator. 1260 * This will either find the terminator or hit the end 1261 * of the buffer and return an error. 1262 */ 1263 rp = (ACPI_RESOURCE *)buf->Pointer; 1264 for (;;) { 1265 /* range check, don't go outside the buffer */ 1266 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1267 return(AE_BAD_PARAMETER); 1268 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1269 (rp->Length == 0)) { 1270 break; 1271 } 1272 rp = ACPI_RESOURCE_NEXT(rp); 1273 } 1274 1275 /* 1276 * Check the size of the buffer and expand if required. 1277 * 1278 * Required size is: 1279 * size of existing resources before terminator + 1280 * size of new resource and header + 1281 * size of terminator. 1282 * 1283 * Note that this loop should really only run once, unless 1284 * for some reason we are stuffing a *really* huge resource. 1285 */ 1286 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1287 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1288 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1289 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1290 return(AE_NO_MEMORY); 1291 bcopy(buf->Pointer, newp, buf->Length); 1292 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1293 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1294 AcpiOsFree(buf->Pointer); 1295 buf->Pointer = newp; 1296 buf->Length += buf->Length; 1297 } 1298 1299 /* 1300 * Insert the new resource. 1301 */ 1302 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1303 1304 /* 1305 * And add the terminator. 1306 */ 1307 rp = ACPI_RESOURCE_NEXT(rp); 1308 rp->Id = ACPI_RSTYPE_END_TAG; 1309 rp->Length = 0; 1310 1311 return(AE_OK); 1312 } 1313 1314 /* 1315 * Set interrupt model. 1316 */ 1317 ACPI_STATUS 1318 acpi_SetIntrModel(int model) 1319 { 1320 ACPI_OBJECT_LIST ArgList; 1321 ACPI_OBJECT Arg; 1322 1323 Arg.Type = ACPI_TYPE_INTEGER; 1324 Arg.Integer.Value = model; 1325 ArgList.Count = 1; 1326 ArgList.Pointer = &Arg; 1327 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1328 } 1329 1330 #define ACPI_MINIMUM_AWAKETIME 5 1331 1332 static void 1333 acpi_sleep_enable(void *arg) 1334 { 1335 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1336 } 1337 1338 /* 1339 * Set the system sleep state 1340 * 1341 * Currently we only support S1 and S5 1342 */ 1343 ACPI_STATUS 1344 acpi_SetSleepState(struct acpi_softc *sc, int state) 1345 { 1346 ACPI_STATUS status = AE_OK; 1347 UINT8 TypeA; 1348 UINT8 TypeB; 1349 1350 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1351 ACPI_ASSERTLOCK; 1352 1353 if (sc->acpi_sstate != ACPI_STATE_S0) 1354 return_ACPI_STATUS(AE_BAD_PARAMETER); /* avoid reentry */ 1355 1356 if (sc->acpi_sleep_disabled) 1357 return_ACPI_STATUS(AE_OK); 1358 1359 switch (state) { 1360 case ACPI_STATE_S0: /* XXX only for testing */ 1361 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1362 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1363 } 1364 break; 1365 1366 case ACPI_STATE_S1: 1367 case ACPI_STATE_S2: 1368 case ACPI_STATE_S3: 1369 case ACPI_STATE_S4: 1370 if (ACPI_FAILURE(status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB))) { 1371 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", AcpiFormatException(status)); 1372 break; 1373 } 1374 1375 sc->acpi_sstate = state; 1376 sc->acpi_sleep_disabled = 1; 1377 1378 /* 1379 * Inform all devices that we are going to sleep. 1380 */ 1381 if (DEVICE_SUSPEND(root_bus) != 0) { 1382 /* 1383 * Re-wake the system. 1384 * 1385 * XXX note that a better two-pass approach with a 'veto' pass 1386 * followed by a "real thing" pass would be better, but the 1387 * current bus interface does not provide for this. 1388 */ 1389 DEVICE_RESUME(root_bus); 1390 return_ACPI_STATUS(AE_ERROR); 1391 } 1392 1393 if (ACPI_FAILURE(status = AcpiEnterSleepStatePrep(state))) { 1394 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1395 AcpiFormatException(status)); 1396 break; 1397 } 1398 1399 if (sc->acpi_sleep_delay > 0) { 1400 DELAY(sc->acpi_sleep_delay * 1000000); 1401 } 1402 1403 if (state != ACPI_STATE_S1) { 1404 acpi_sleep_machdep(sc, state); 1405 1406 /* AcpiEnterSleepState() maybe incompleted, unlock here if locked. */ 1407 if (AcpiGbl_AcpiMutexInfo[ACPI_MTX_HARDWARE].OwnerId != ACPI_MUTEX_NOT_ACQUIRED) { 1408 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1409 } 1410 1411 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1412 if (state == ACPI_STATE_S4) { 1413 AcpiEnable(); 1414 } 1415 } else { 1416 if (ACPI_FAILURE(status = AcpiEnterSleepState((UINT8)state))) { 1417 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1418 break; 1419 } 1420 } 1421 AcpiLeaveSleepState((UINT8)state); 1422 DEVICE_RESUME(root_bus); 1423 sc->acpi_sstate = ACPI_STATE_S0; 1424 acpi_enable_fixed_events(sc); 1425 break; 1426 1427 case ACPI_STATE_S5: 1428 /* 1429 * Shut down cleanly and power off. This will call us back through the 1430 * shutdown handlers. 1431 */ 1432 shutdown_nice(RB_POWEROFF); 1433 break; 1434 1435 default: 1436 status = AE_BAD_PARAMETER; 1437 break; 1438 } 1439 1440 if (sc->acpi_sleep_disabled) 1441 callout_reset(&sc->acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME, 1442 acpi_sleep_enable, sc); 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 hp = malloc(sizeof(*hp), M_ACPIDEV, M_INTWAIT); 1816 hp->cmd = cmd; 1817 hp->fn = fn; 1818 hp->arg = arg; 1819 if (acpi_ioctl_hooks_initted == 0) { 1820 TAILQ_INIT(&acpi_ioctl_hooks); 1821 acpi_ioctl_hooks_initted = 1; 1822 } 1823 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1824 return(0); 1825 } 1826 1827 /* 1828 * Deregister an ioctl handler. 1829 */ 1830 void 1831 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1832 { 1833 struct acpi_ioctl_hook *hp; 1834 1835 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1836 if ((hp->cmd == cmd) && (hp->fn == fn)) 1837 break; 1838 1839 if (hp != NULL) { 1840 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1841 free(hp, M_ACPIDEV); 1842 } 1843 } 1844 1845 static int 1846 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 1847 { 1848 return(0); 1849 } 1850 1851 static int 1852 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 1853 { 1854 return(0); 1855 } 1856 1857 static int 1858 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 1859 { 1860 struct acpi_softc *sc; 1861 struct acpi_ioctl_hook *hp; 1862 int error, xerror, state; 1863 ACPI_LOCK_DECL; 1864 1865 ACPI_LOCK; 1866 1867 error = state = 0; 1868 sc = dev->si_drv1; 1869 1870 /* 1871 * Scan the list of registered ioctls, looking for handlers. 1872 */ 1873 if (acpi_ioctl_hooks_initted) { 1874 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1875 if (hp->cmd == cmd) { 1876 xerror = hp->fn(cmd, addr, hp->arg); 1877 if (xerror != 0) 1878 error = xerror; 1879 goto out; 1880 } 1881 } 1882 } 1883 1884 /* 1885 * Core ioctls are not permitted for non-writable user. 1886 * Currently, other ioctls just fetch information. 1887 * Not changing system behavior. 1888 */ 1889 if(!(flag & FWRITE)){ 1890 return EPERM; 1891 } 1892 1893 /* 1894 * Core system ioctls. 1895 */ 1896 switch (cmd) { 1897 case ACPIIO_ENABLE: 1898 if (ACPI_FAILURE(acpi_Enable(sc))) 1899 error = ENXIO; 1900 break; 1901 1902 case ACPIIO_DISABLE: 1903 if (ACPI_FAILURE(acpi_Disable(sc))) 1904 error = ENXIO; 1905 break; 1906 1907 case ACPIIO_SETSLPSTATE: 1908 if (!sc->acpi_enabled) { 1909 error = ENXIO; 1910 break; 1911 } 1912 state = *(int *)addr; 1913 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1914 acpi_SetSleepState(sc, state); 1915 } else { 1916 error = EINVAL; 1917 } 1918 break; 1919 1920 default: 1921 if (error == 0) 1922 error = EINVAL; 1923 break; 1924 } 1925 1926 out: 1927 ACPI_UNLOCK; 1928 return(error); 1929 } 1930 1931 static int 1932 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1933 { 1934 char sleep_state[4]; 1935 char buf[16]; 1936 int error; 1937 UINT8 state, TypeA, TypeB; 1938 1939 buf[0] = '\0'; 1940 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 1941 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 1942 sprintf(sleep_state, "S%d ", state); 1943 strcat(buf, sleep_state); 1944 } 1945 } 1946 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 1947 return(error); 1948 } 1949 1950 static int 1951 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1952 { 1953 char sleep_state[10]; 1954 int error; 1955 u_int new_state, old_state; 1956 1957 old_state = *(u_int *)oidp->oid_arg1; 1958 if (old_state > ACPI_S_STATES_MAX+1) { 1959 strcpy(sleep_state, "unknown"); 1960 } else { 1961 bzero(sleep_state, sizeof(sleep_state)); 1962 strncpy(sleep_state, sleep_state_names[old_state], 1963 sizeof(sleep_state_names[old_state])); 1964 } 1965 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1966 if (error == 0 && req->newptr != NULL) { 1967 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX+1; new_state++) { 1968 if (strncmp(sleep_state, sleep_state_names[new_state], 1969 sizeof(sleep_state)) == 0) 1970 break; 1971 } 1972 if (new_state <= ACPI_S_STATES_MAX+1) { 1973 if (new_state != old_state) { 1974 *(u_int *)oidp->oid_arg1 = new_state; 1975 } 1976 } else { 1977 error = EINVAL; 1978 } 1979 } 1980 return(error); 1981 } 1982 1983 #ifdef ACPI_DEBUG 1984 /* 1985 * Support for parsing debug options from the kernel environment. 1986 * 1987 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1988 * by specifying the names of the bits in the debug.acpi.layer and 1989 * debug.acpi.level environment variables. Bits may be unset by 1990 * prefixing the bit name with !. 1991 */ 1992 struct debugtag 1993 { 1994 char *name; 1995 UINT32 value; 1996 }; 1997 1998 static struct debugtag dbg_layer[] = { 1999 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2000 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2001 {"ACPI_EVENTS", ACPI_EVENTS}, 2002 {"ACPI_TABLES", ACPI_TABLES}, 2003 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2004 {"ACPI_PARSER", ACPI_PARSER}, 2005 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2006 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2007 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2008 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2009 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2010 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2011 2012 {"ACPI_BUS", ACPI_BUS}, 2013 {"ACPI_SYSTEM", ACPI_SYSTEM}, 2014 {"ACPI_POWER", ACPI_POWER}, 2015 {"ACPI_EC", ACPI_EC}, 2016 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2017 {"ACPI_BATTERY", ACPI_BATTERY}, 2018 {"ACPI_BUTTON", ACPI_BUTTON}, 2019 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2020 {"ACPI_THERMAL", ACPI_THERMAL}, 2021 {"ACPI_FAN", ACPI_FAN}, 2022 2023 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2024 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2025 {NULL, 0} 2026 }; 2027 2028 static struct debugtag dbg_level[] = { 2029 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2030 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2031 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2032 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2033 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2034 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2035 2036 /* Trace verbosity level 1 [Standard Trace Level] */ 2037 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2038 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2039 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2040 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2041 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2042 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2043 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2044 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2045 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2046 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2047 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2048 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2049 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2050 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2051 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2052 2053 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2054 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2055 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2056 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2057 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2058 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2059 2060 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2061 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2062 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2063 {"ACPI_LV_IO", ACPI_LV_IO}, 2064 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2065 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2066 2067 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2068 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2069 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2070 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2071 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2072 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2073 {NULL, 0} 2074 }; 2075 2076 static void 2077 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2078 { 2079 char *ep; 2080 int i, l; 2081 int set; 2082 2083 while (*cp) { 2084 if (isspace(*cp)) { 2085 cp++; 2086 continue; 2087 } 2088 ep = cp; 2089 while (*ep && !isspace(*ep)) 2090 ep++; 2091 if (*cp == '!') { 2092 set = 0; 2093 cp++; 2094 if (cp == ep) 2095 continue; 2096 } else { 2097 set = 1; 2098 } 2099 l = ep - cp; 2100 for (i = 0; tag[i].name != NULL; i++) { 2101 if (!strncmp(cp, tag[i].name, l)) { 2102 if (set) { 2103 *flag |= tag[i].value; 2104 } else { 2105 *flag &= ~tag[i].value; 2106 } 2107 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2108 } 2109 } 2110 cp = ep; 2111 } 2112 } 2113 2114 static void 2115 acpi_set_debugging(void *junk) 2116 { 2117 char *cp; 2118 2119 if (!cold) 2120 return; 2121 2122 AcpiDbgLayer = 0; 2123 AcpiDbgLevel = 0; 2124 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2125 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2126 freeenv(cp); 2127 } 2128 if ((cp = getenv("debug.acpi.level")) != NULL) { 2129 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2130 freeenv(cp); 2131 } 2132 2133 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 2134 } 2135 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 2136 #endif 2137 2138 static int 2139 acpi_pm_func(u_long cmd, void *arg, ...) 2140 { 2141 int state, acpi_state; 2142 int error; 2143 struct acpi_softc *sc; 2144 __va_list ap; 2145 2146 error = 0; 2147 switch (cmd) { 2148 case POWER_CMD_SUSPEND: 2149 sc = (struct acpi_softc *)arg; 2150 if (sc == NULL) { 2151 error = EINVAL; 2152 goto out; 2153 } 2154 2155 __va_start(ap, arg); 2156 state = __va_arg(ap, int); 2157 __va_end(ap); 2158 2159 switch (state) { 2160 case POWER_SLEEP_STATE_STANDBY: 2161 acpi_state = sc->acpi_standby_sx; 2162 break; 2163 case POWER_SLEEP_STATE_SUSPEND: 2164 acpi_state = sc->acpi_suspend_sx; 2165 break; 2166 case POWER_SLEEP_STATE_HIBERNATE: 2167 acpi_state = ACPI_STATE_S4; 2168 break; 2169 default: 2170 error = EINVAL; 2171 goto out; 2172 } 2173 2174 acpi_SetSleepState(sc, acpi_state); 2175 break; 2176 2177 default: 2178 error = EINVAL; 2179 goto out; 2180 } 2181 2182 out: 2183 return (error); 2184 } 2185 2186 static void 2187 acpi_pm_register(void *arg) 2188 { 2189 int error; 2190 2191 if (!cold) 2192 return; 2193 2194 if (!resource_int_value("acpi", 0, "disabled", &error) && 2195 (error != 0)) 2196 return; 2197 2198 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2199 } 2200 2201 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2202 2203