1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/ioccom.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 47 #include <machine/clock.h> 48 #include <machine/resource.h> 49 #include <isa/isavar.h> 50 51 #include "acpi.h" 52 #include <dev/acpica/acpivar.h> 53 #include <dev/acpica/acpiio.h> 54 55 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 56 57 /* Hooks for the ACPI CA debugging infrastructure */ 58 #define _COMPONENT ACPI_BUS 59 ACPI_MODULE_NAME("ACPI") 60 61 static d_open_t acpiopen; 62 static d_close_t acpiclose; 63 static d_ioctl_t acpiioctl; 64 65 #define CDEV_MAJOR 152 66 static struct cdevsw acpi_cdevsw = { 67 .d_open = acpiopen, 68 .d_close = acpiclose, 69 .d_ioctl = acpiioctl, 70 .d_name = "acpi", 71 .d_maj = CDEV_MAJOR, 72 }; 73 74 static const char* sleep_state_names[] = { 75 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 76 77 /* this has to be static, as the softc is gone when we need it */ 78 static int acpi_off_state = ACPI_STATE_S5; 79 80 #if __FreeBSD_version >= 500000 81 struct mtx acpi_mutex; 82 #endif 83 84 static int acpi_modevent(struct module *mod, int event, void *junk); 85 static void acpi_identify(driver_t *driver, device_t parent); 86 static int acpi_probe(device_t dev); 87 static int acpi_attach(device_t dev); 88 static device_t acpi_add_child(device_t bus, int order, const char *name, 89 int unit); 90 static int acpi_print_child(device_t bus, device_t child); 91 static int acpi_read_ivar(device_t dev, device_t child, int index, 92 uintptr_t *result); 93 static int acpi_write_ivar(device_t dev, device_t child, int index, 94 uintptr_t value); 95 static int acpi_set_resource(device_t dev, device_t child, int type, 96 int rid, u_long start, u_long count); 97 static int acpi_get_resource(device_t dev, device_t child, int type, 98 int rid, u_long *startp, u_long *countp); 99 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 100 int type, int *rid, u_long start, u_long end, 101 u_long count, u_int flags); 102 static int acpi_release_resource(device_t bus, device_t child, int type, 103 int rid, struct resource *r); 104 static u_int32_t acpi_isa_get_logicalid(device_t dev); 105 static u_int32_t acpi_isa_get_compatid(device_t dev); 106 static int acpi_isa_pnp_probe(device_t bus, device_t child, 107 struct isa_pnp_id *ids); 108 static void acpi_probe_children(device_t bus); 109 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 110 void *context, void **status); 111 static void acpi_shutdown_pre_sync(void *arg, int howto); 112 static void acpi_shutdown_final(void *arg, int howto); 113 static void acpi_enable_fixed_events(struct acpi_softc *sc); 114 static void acpi_system_eventhandler_sleep(void *arg, int state); 115 static void acpi_system_eventhandler_wakeup(void *arg, int state); 116 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 117 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 118 static int acpi_pm_func(u_long cmd, void *arg, ...); 119 120 static device_method_t acpi_methods[] = { 121 /* Device interface */ 122 DEVMETHOD(device_identify, acpi_identify), 123 DEVMETHOD(device_probe, acpi_probe), 124 DEVMETHOD(device_attach, acpi_attach), 125 DEVMETHOD(device_shutdown, bus_generic_shutdown), 126 DEVMETHOD(device_suspend, bus_generic_suspend), 127 DEVMETHOD(device_resume, bus_generic_resume), 128 129 /* Bus interface */ 130 DEVMETHOD(bus_add_child, acpi_add_child), 131 DEVMETHOD(bus_print_child, acpi_print_child), 132 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 133 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 134 DEVMETHOD(bus_set_resource, acpi_set_resource), 135 DEVMETHOD(bus_get_resource, acpi_get_resource), 136 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 137 DEVMETHOD(bus_release_resource, acpi_release_resource), 138 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 139 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 140 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 141 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 142 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 143 144 /* ISA emulation */ 145 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 146 147 {0, 0} 148 }; 149 150 static driver_t acpi_driver = { 151 "acpi", 152 acpi_methods, 153 sizeof(struct acpi_softc), 154 }; 155 156 static devclass_t acpi_devclass; 157 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 158 MODULE_VERSION(acpi, 100); 159 160 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, 161 ""); 162 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, 163 ""); 164 static int acpi_ca_version = ACPI_CA_VERSION; 165 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, 166 ""); 167 168 /* 169 * ACPI can only be loaded as a module by the loader; activating it after 170 * system bootstrap time is not useful, and can be fatal to the system. 171 * It also cannot be unloaded, since the entire system bus heirarchy hangs 172 * off it. 173 */ 174 static int 175 acpi_modevent(struct module *mod, int event, void *junk) 176 { 177 switch(event) { 178 case MOD_LOAD: 179 if (!cold) { 180 printf("The ACPI driver cannot be loaded after boot.\n"); 181 return (EPERM); 182 } 183 break; 184 case MOD_UNLOAD: 185 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 186 return (EBUSY); 187 break; 188 default: 189 break; 190 } 191 return (0); 192 } 193 194 /* 195 * Detect ACPI, perform early initialisation 196 */ 197 static void 198 acpi_identify(driver_t *driver, device_t parent) 199 { 200 device_t child; 201 int error; 202 #ifdef ACPI_DEBUGGER 203 char *debugpoint; 204 #endif 205 206 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 207 208 if (!cold) 209 return_VOID; 210 211 /* Check that we haven't been disabled with a hint. */ 212 if (resource_disabled("acpi", 0)) 213 return_VOID; 214 215 /* Make sure we're not being doubly invoked. */ 216 if (device_find_child(parent, "acpi", 0) != NULL) 217 return_VOID; 218 219 #if __FreeBSD_version >= 500000 220 /* Initialise the ACPI mutex */ 221 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 222 #endif 223 224 /* Start up the ACPI CA subsystem. */ 225 #ifdef ACPI_DEBUGGER 226 debugpoint = getenv("debug.acpi.debugger"); 227 if (debugpoint) { 228 if (!strcmp(debugpoint, "init")) 229 acpi_EnterDebugger(); 230 freeenv(debugpoint); 231 } 232 #endif 233 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 234 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 235 return_VOID; 236 } 237 #ifdef ACPI_DEBUGGER 238 debugpoint = getenv("debug.acpi.debugger"); 239 if (debugpoint) { 240 if (!strcmp(debugpoint, "tables")) 241 acpi_EnterDebugger(); 242 freeenv(debugpoint); 243 } 244 #endif 245 246 if (ACPI_FAILURE(error = AcpiLoadTables())) { 247 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 248 return_VOID; 249 } 250 251 /* Attach the actual ACPI device. */ 252 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 253 device_printf(parent, "ACPI: could not attach\n"); 254 return_VOID; 255 } 256 } 257 258 /* 259 * Fetch some descriptive data from ACPI to put in our attach message 260 */ 261 static int 262 acpi_probe(device_t dev) 263 { 264 ACPI_TABLE_HEADER th; 265 char buf[20]; 266 ACPI_STATUS status; 267 int error; 268 ACPI_LOCK_DECL; 269 270 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 271 272 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 273 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 274 275 device_printf(dev, "Other PM system enabled.\n"); 276 return_VALUE(ENXIO); 277 } 278 279 ACPI_LOCK; 280 281 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 282 device_printf(dev, "couldn't get XSDT header: %s\n", 283 AcpiFormatException(status)); 284 error = ENXIO; 285 } else { 286 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 287 device_set_desc_copy(dev, buf); 288 error = 0; 289 } 290 ACPI_UNLOCK; 291 return_VALUE(error); 292 } 293 294 static int 295 acpi_attach(device_t dev) 296 { 297 struct acpi_softc *sc; 298 ACPI_STATUS status; 299 int error; 300 UINT32 flags; 301 char *env; 302 #ifdef ACPI_DEBUGGER 303 char *debugpoint; 304 #endif 305 ACPI_LOCK_DECL; 306 307 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 308 ACPI_LOCK; 309 sc = device_get_softc(dev); 310 bzero(sc, sizeof(*sc)); 311 sc->acpi_dev = dev; 312 313 #ifdef ACPI_DEBUGGER 314 debugpoint = getenv("debug.acpi.debugger"); 315 if (debugpoint) { 316 if (!strcmp(debugpoint, "spaces")) 317 acpi_EnterDebugger(); 318 freeenv(debugpoint); 319 } 320 #endif 321 322 /* Install the default address space handlers. */ 323 error = ENXIO; 324 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 325 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 326 if (ACPI_FAILURE(status)) { 327 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 328 AcpiFormatException(status)); 329 goto out; 330 } 331 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 332 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 333 if (ACPI_FAILURE(status)) { 334 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 335 AcpiFormatException(status)); 336 goto out; 337 } 338 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 339 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 340 if (ACPI_FAILURE(status)) { 341 device_printf(dev, "could not initialise PciConfig handler: %s\n", 342 AcpiFormatException(status)); 343 goto out; 344 } 345 346 /* 347 * Bring ACPI fully online. 348 * 349 * Note that some systems (specifically, those with namespace evaluation 350 * issues that require the avoidance of parts of the namespace) must 351 * avoid running _INI and _STA on everything, as well as dodging the final 352 * object init pass. 353 * 354 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 355 * 356 * XXX We should arrange for the object init pass after we have attached 357 * all our child devices, but on many systems it works here. 358 */ 359 #ifdef ACPI_DEBUGGER 360 debugpoint = getenv("debug.acpi.debugger"); 361 if (debugpoint) { 362 if (!strcmp(debugpoint, "enable")) 363 acpi_EnterDebugger(); 364 freeenv(debugpoint); 365 } 366 #endif 367 flags = 0; 368 if (testenv("debug.acpi.avoid")) 369 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 370 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 371 device_printf(dev, "Could not enable ACPI: %s\n", 372 AcpiFormatException(status)); 373 goto out; 374 } 375 376 /* 377 * Call the ECDT probe function to provide EC functionality before 378 * the namespace has been evaluated. 379 */ 380 acpi_ec_ecdt_probe(dev); 381 382 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 383 device_printf(dev, "Could not initialize ACPI objects: %s\n", 384 AcpiFormatException(status)); 385 goto out; 386 } 387 388 /* 389 * Setup our sysctl tree. 390 * 391 * XXX: This doesn't check to make sure that none of these fail. 392 */ 393 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 394 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 395 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 396 device_get_name(dev), CTLFLAG_RD, 0, ""); 397 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 398 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 399 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 400 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 401 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 402 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 403 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 404 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 405 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 406 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 407 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 408 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 409 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 410 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 411 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 412 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 413 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 414 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 415 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 416 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 417 &sc->acpi_sleep_delay, 0, "sleep delay"); 418 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 419 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 420 &sc->acpi_s4bios, 0, "S4BIOS mode"); 421 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 422 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 423 &sc->acpi_verbose, 0, "verbose mode"); 424 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 425 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 426 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 427 428 /* 429 * Default to 5 seconds before sleeping to give some machines time to 430 * stabilize. 431 */ 432 sc->acpi_sleep_delay = 5; 433 sc->acpi_disable_on_poweroff = 1; 434 if (bootverbose) 435 sc->acpi_verbose = 1; 436 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 437 sc->acpi_verbose = 1; 438 freeenv(env); 439 } 440 441 /* Only enable S4BIOS by default if the FACS says it is available. */ 442 if (AcpiGbl_FACS->S4Bios_f != 0) 443 sc->acpi_s4bios = 1; 444 445 /* 446 * Dispatch the default sleep state to devices. 447 * TBD: should be configured from userland policy manager. 448 */ 449 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 450 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 451 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 452 sc->acpi_standby_sx = ACPI_STATE_S1; 453 sc->acpi_suspend_sx = ACPI_STATE_S3; 454 455 acpi_enable_fixed_events(sc); 456 457 /* 458 * Scan the namespace and attach/initialise children. 459 */ 460 #ifdef ACPI_DEBUGGER 461 debugpoint = getenv("debug.acpi.debugger"); 462 if (debugpoint) { 463 if (!strcmp(debugpoint, "probe")) 464 acpi_EnterDebugger(); 465 freeenv(debugpoint); 466 } 467 #endif 468 469 /* Register our shutdown handlers */ 470 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 471 SHUTDOWN_PRI_LAST); 472 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 473 SHUTDOWN_PRI_LAST); 474 475 /* 476 * Register our acpi event handlers. 477 * XXX should be configurable eg. via userland policy manager. 478 */ 479 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 480 sc, ACPI_EVENT_PRI_LAST); 481 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 482 sc, ACPI_EVENT_PRI_LAST); 483 484 /* Flag our initial states. */ 485 sc->acpi_enabled = 1; 486 sc->acpi_sstate = ACPI_STATE_S0; 487 sc->acpi_sleep_disabled = 0; 488 489 /* Create the control device */ 490 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 491 "acpi"); 492 sc->acpi_dev_t->si_drv1 = sc; 493 494 #ifdef ACPI_DEBUGGER 495 debugpoint = getenv("debug.acpi.debugger"); 496 if (debugpoint) { 497 if (strcmp(debugpoint, "running") == 0) 498 acpi_EnterDebugger(); 499 freeenv(debugpoint); 500 } 501 #endif 502 503 #ifdef ACPI_USE_THREADS 504 if ((error = acpi_task_thread_init())) 505 goto out; 506 #endif 507 508 if ((error = acpi_machdep_init(dev))) 509 goto out; 510 511 /* Register ACPI again to pass the correct argument of pm_func. */ 512 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 513 514 if (!acpi_disabled("bus")) 515 acpi_probe_children(dev); 516 517 error = 0; 518 519 out: 520 ACPI_UNLOCK; 521 return_VALUE (error); 522 } 523 524 /* 525 * Handle a new device being added 526 */ 527 static device_t 528 acpi_add_child(device_t bus, int order, const char *name, int unit) 529 { 530 struct acpi_device *ad; 531 device_t child; 532 533 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 534 return (NULL); 535 536 resource_list_init(&ad->ad_rl); 537 538 child = device_add_child_ordered(bus, order, name, unit); 539 if (child != NULL) 540 device_set_ivars(child, ad); 541 return (child); 542 } 543 544 static int 545 acpi_print_child(device_t bus, device_t child) 546 { 547 struct acpi_device *adev = device_get_ivars(child); 548 struct resource_list *rl = &adev->ad_rl; 549 int retval = 0; 550 551 retval += bus_print_child_header(bus, child); 552 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 553 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 554 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 555 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 556 retval += bus_print_child_footer(bus, child); 557 558 return (retval); 559 } 560 561 562 /* 563 * Handle per-device ivars 564 */ 565 static int 566 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 567 { 568 struct acpi_device *ad; 569 570 if ((ad = device_get_ivars(child)) == NULL) { 571 printf("device has no ivars\n"); 572 return (ENOENT); 573 } 574 575 /* ACPI and ISA compatibility ivars */ 576 switch(index) { 577 case ACPI_IVAR_HANDLE: 578 *(ACPI_HANDLE *)result = ad->ad_handle; 579 break; 580 case ACPI_IVAR_MAGIC: 581 *(int *)result = ad->ad_magic; 582 break; 583 case ACPI_IVAR_PRIVATE: 584 *(void **)result = ad->ad_private; 585 break; 586 case ISA_IVAR_VENDORID: 587 case ISA_IVAR_SERIAL: 588 case ISA_IVAR_COMPATID: 589 *(int *)result = -1; 590 break; 591 case ISA_IVAR_LOGICALID: 592 *(int *)result = acpi_isa_get_logicalid(child); 593 break; 594 default: 595 return (ENOENT); 596 } 597 598 return (0); 599 } 600 601 static int 602 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 603 { 604 struct acpi_device *ad; 605 606 if ((ad = device_get_ivars(child)) == NULL) { 607 printf("device has no ivars\n"); 608 return (ENOENT); 609 } 610 611 switch(index) { 612 case ACPI_IVAR_HANDLE: 613 ad->ad_handle = (ACPI_HANDLE)value; 614 break; 615 case ACPI_IVAR_MAGIC: 616 ad->ad_magic = (int)value; 617 break; 618 case ACPI_IVAR_PRIVATE: 619 ad->ad_private = (void *)value; 620 break; 621 default: 622 panic("bad ivar write request (%d)", index); 623 return (ENOENT); 624 } 625 626 return (0); 627 } 628 629 ACPI_HANDLE 630 acpi_get_handle(device_t dev) 631 { 632 uintptr_t up; 633 ACPI_HANDLE h; 634 635 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, &up)) 636 return(NULL); 637 h = (ACPI_HANDLE)up; 638 return (h); 639 } 640 641 int 642 acpi_set_handle(device_t dev, ACPI_HANDLE h) 643 { 644 uintptr_t up; 645 646 up = (uintptr_t)h; 647 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, up)); 648 } 649 650 int 651 acpi_get_magic(device_t dev) 652 { 653 uintptr_t up; 654 int m; 655 656 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, &up)) 657 return(0); 658 m = (int)up; 659 return (m); 660 } 661 662 int 663 acpi_set_magic(device_t dev, int m) 664 { 665 uintptr_t up; 666 667 up = (uintptr_t)m; 668 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, up)); 669 } 670 671 void * 672 acpi_get_private(device_t dev) 673 { 674 uintptr_t up; 675 void *p; 676 677 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, &up)) 678 return (NULL); 679 p = (void *)up; 680 return (p); 681 } 682 683 int 684 acpi_set_private(device_t dev, void *p) 685 { 686 uintptr_t up; 687 688 up = (uintptr_t)p; 689 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, up)); 690 } 691 692 ACPI_OBJECT_TYPE 693 acpi_get_type(device_t dev) 694 { 695 ACPI_HANDLE h; 696 ACPI_OBJECT_TYPE t; 697 698 if ((h = acpi_get_handle(dev)) == NULL) 699 return (ACPI_TYPE_NOT_FOUND); 700 if (AcpiGetType(h, &t) != AE_OK) 701 return (ACPI_TYPE_NOT_FOUND); 702 return (t); 703 } 704 705 /* 706 * Handle child resource allocation/removal 707 */ 708 static int 709 acpi_set_resource(device_t dev, device_t child, int type, int rid, 710 u_long start, u_long count) 711 { 712 struct acpi_device *ad = device_get_ivars(child); 713 struct resource_list *rl = &ad->ad_rl; 714 715 resource_list_add(rl, type, rid, start, start + count -1, count); 716 717 return(0); 718 } 719 720 static int 721 acpi_get_resource(device_t dev, device_t child, int type, int rid, 722 u_long *startp, u_long *countp) 723 { 724 struct acpi_device *ad = device_get_ivars(child); 725 struct resource_list *rl = &ad->ad_rl; 726 struct resource_list_entry *rle; 727 728 rle = resource_list_find(rl, type, rid); 729 if (!rle) 730 return(ENOENT); 731 732 if (startp) 733 *startp = rle->start; 734 if (countp) 735 *countp = rle->count; 736 737 return (0); 738 } 739 740 static struct resource * 741 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 742 u_long start, u_long end, u_long count, u_int flags) 743 { 744 struct acpi_device *ad = device_get_ivars(child); 745 struct resource_list *rl = &ad->ad_rl; 746 747 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 748 flags)); 749 } 750 751 static int 752 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 753 { 754 struct acpi_device *ad = device_get_ivars(child); 755 struct resource_list *rl = &ad->ad_rl; 756 757 return(resource_list_release(rl, bus, child, type, rid, r)); 758 } 759 760 /* 761 * Handle ISA-like devices probing for a PnP ID to match. 762 */ 763 #define PNP_EISAID(s) \ 764 ((((s[0] - '@') & 0x1f) << 2) \ 765 | (((s[1] - '@') & 0x18) >> 3) \ 766 | (((s[1] - '@') & 0x07) << 13) \ 767 | (((s[2] - '@') & 0x1f) << 8) \ 768 | (PNP_HEXTONUM(s[4]) << 16) \ 769 | (PNP_HEXTONUM(s[3]) << 20) \ 770 | (PNP_HEXTONUM(s[6]) << 24) \ 771 | (PNP_HEXTONUM(s[5]) << 28)) 772 773 static u_int32_t 774 acpi_isa_get_logicalid(device_t dev) 775 { 776 ACPI_HANDLE h; 777 ACPI_DEVICE_INFO devinfo; 778 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 779 ACPI_STATUS error; 780 u_int32_t pnpid; 781 ACPI_LOCK_DECL; 782 783 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 784 785 pnpid = 0; 786 ACPI_LOCK; 787 788 /* Fetch and validate the HID. */ 789 if ((h = acpi_get_handle(dev)) == NULL) 790 goto out; 791 error = AcpiGetObjectInfo(h, &buf); 792 if (ACPI_FAILURE(error)) 793 goto out; 794 if ((devinfo.Valid & ACPI_VALID_HID) == 0) 795 goto out; 796 797 pnpid = PNP_EISAID(devinfo.HardwareId.Value); 798 799 out: 800 ACPI_UNLOCK; 801 return_VALUE (pnpid); 802 } 803 804 static u_int32_t 805 acpi_isa_get_compatid(device_t dev) 806 { 807 ACPI_HANDLE h; 808 ACPI_STATUS error; 809 u_int32_t pnpid; 810 ACPI_LOCK_DECL; 811 812 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 813 814 pnpid = 0; 815 ACPI_LOCK; 816 817 /* Fetch and validate the HID */ 818 if ((h = acpi_get_handle(dev)) == NULL) 819 goto out; 820 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &pnpid))) 821 goto out; 822 823 out: 824 ACPI_UNLOCK; 825 return_VALUE (pnpid); 826 } 827 828 829 static int 830 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 831 { 832 int result; 833 u_int32_t lid, cid; 834 835 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 836 837 /* 838 * ISA-style drivers attached to ACPI may persist and 839 * probe manually if we return ENOENT. We never want 840 * that to happen, so don't ever return it. 841 */ 842 result = ENXIO; 843 844 /* Scan the supplied IDs for a match */ 845 lid = acpi_isa_get_logicalid(child); 846 cid = acpi_isa_get_compatid(child); 847 while (ids && ids->ip_id) { 848 if (lid == ids->ip_id || cid == ids->ip_id) { 849 result = 0; 850 goto out; 851 } 852 ids++; 853 } 854 855 out: 856 return_VALUE(result); 857 } 858 859 /* 860 * Scan relevant portions of the ACPI namespace and attach child devices. 861 * 862 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 863 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 864 */ 865 static void 866 acpi_probe_children(device_t bus) 867 { 868 ACPI_HANDLE parent; 869 ACPI_STATUS status; 870 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 871 int i; 872 873 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 874 ACPI_ASSERTLOCK; 875 876 /* Create any static children by calling device identify methods. */ 877 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 878 bus_generic_probe(bus); 879 880 /* 881 * Scan the namespace and insert placeholders for all the devices that 882 * we find. 883 * 884 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 885 * we want to create nodes for all devices, not just those that are 886 * currently present. (This assumes that we don't want to create/remove 887 * devices as they appear, which might be smarter.) 888 */ 889 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 890 for (i = 0; scopes[i] != NULL; i++) { 891 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 892 if (ACPI_SUCCESS(status)) { 893 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 894 bus, NULL); 895 } 896 } 897 898 /* 899 * Scan all of the child devices we have created and let them probe/attach. 900 */ 901 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 902 bus_generic_attach(bus); 903 904 /* 905 * Some of these children may have attached others as part of their attach 906 * process (eg. the root PCI bus driver), so rescan. 907 */ 908 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 909 bus_generic_attach(bus); 910 911 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 912 return_VOID; 913 } 914 915 /* 916 * Evaluate a child device and determine whether we might attach a device to 917 * it. 918 */ 919 static ACPI_STATUS 920 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 921 { 922 ACPI_OBJECT_TYPE type; 923 device_t child, bus = (device_t)context; 924 925 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 926 927 /* Skip this device if we think we'll have trouble with it. */ 928 if (acpi_avoid(handle)) 929 return_ACPI_STATUS (AE_OK); 930 931 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 932 switch(type) { 933 case ACPI_TYPE_DEVICE: 934 case ACPI_TYPE_PROCESSOR: 935 case ACPI_TYPE_THERMAL: 936 case ACPI_TYPE_POWER: 937 if (acpi_disabled("children")) 938 break; 939 940 /* 941 * Create a placeholder device for this node. Sort the placeholder 942 * so that the probe/attach passes will run breadth-first. 943 */ 944 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 945 acpi_name(handle))); 946 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 947 if (child == NULL) 948 break; 949 acpi_set_handle(child, handle); 950 951 /* 952 * Check that the device is present. If it's not present, 953 * leave it disabled (so that we have a device_t attached to 954 * the handle, but we don't probe it). 955 */ 956 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 957 device_disable(child); 958 break; 959 } 960 961 /* 962 * Get the device's resource settings and attach them. 963 * Note that if the device has _PRS but no _CRS, we need 964 * to decide when it's appropriate to try to configure the 965 * device. Ignore the return value here; it's OK for the 966 * device not to have any resources. 967 */ 968 acpi_parse_resources(child, handle, &acpi_res_parse_set); 969 970 /* If we're debugging, probe/attach now rather than later */ 971 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 972 break; 973 } 974 } 975 976 return_ACPI_STATUS (AE_OK); 977 } 978 979 static void 980 acpi_shutdown_pre_sync(void *arg, int howto) 981 { 982 struct acpi_softc *sc = arg; 983 984 ACPI_ASSERTLOCK; 985 986 /* 987 * Disable all ACPI events before soft off, otherwise the system 988 * will be turned on again on some laptops. 989 * 990 * XXX this should probably be restricted to masking some events just 991 * before powering down, since we may still need ACPI during the 992 * shutdown process. 993 */ 994 if (sc->acpi_disable_on_poweroff) 995 acpi_Disable(sc); 996 } 997 998 static void 999 acpi_shutdown_final(void *arg, int howto) 1000 { 1001 ACPI_STATUS status; 1002 1003 ACPI_ASSERTLOCK; 1004 1005 if ((howto & RB_POWEROFF) != 0) { 1006 printf("Powering system off using ACPI\n"); 1007 status = AcpiEnterSleepStatePrep(acpi_off_state); 1008 if (ACPI_FAILURE(status)) { 1009 printf("AcpiEnterSleepStatePrep failed - %s\n", 1010 AcpiFormatException(status)); 1011 return; 1012 } 1013 status = AcpiEnterSleepState(acpi_off_state); 1014 if (ACPI_FAILURE(status)) { 1015 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1016 } else { 1017 DELAY(1000000); 1018 printf("ACPI power-off failed - timeout\n"); 1019 } 1020 } else { 1021 printf("Shutting down ACPI\n"); 1022 AcpiTerminate(); 1023 } 1024 } 1025 1026 static void 1027 acpi_enable_fixed_events(struct acpi_softc *sc) 1028 { 1029 static int first_time = 1; 1030 1031 ACPI_ASSERTLOCK; 1032 1033 /* Enable and clear fixed events and install handlers. */ 1034 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1035 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, 0); 1036 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1037 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1038 acpi_eventhandler_power_button_for_sleep, 1039 sc); 1040 if (first_time) 1041 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1042 } 1043 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1044 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, 0); 1045 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1046 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1047 acpi_eventhandler_sleep_button_for_sleep, 1048 sc); 1049 if (first_time) 1050 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1051 } 1052 1053 first_time = 0; 1054 } 1055 1056 /* 1057 * Returns true if the device is actually present and should 1058 * be attached to. This requires the present, enabled, UI-visible 1059 * and diagnostics-passed bits to be set. 1060 */ 1061 BOOLEAN 1062 acpi_DeviceIsPresent(device_t dev) 1063 { 1064 ACPI_HANDLE h; 1065 ACPI_DEVICE_INFO devinfo; 1066 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 1067 ACPI_STATUS error; 1068 1069 ACPI_ASSERTLOCK; 1070 1071 if ((h = acpi_get_handle(dev)) == NULL) 1072 return (FALSE); 1073 error = AcpiGetObjectInfo(h, &buf); 1074 if (ACPI_FAILURE(error)) 1075 return (FALSE); 1076 1077 /* If no _STA method, must be present */ 1078 if ((devinfo.Valid & ACPI_VALID_STA) == 0) 1079 return (TRUE); 1080 1081 /* Return true for 'present' and 'functioning' */ 1082 if ((devinfo.CurrentStatus & 0x9) == 0x9) 1083 return (TRUE); 1084 1085 return (FALSE); 1086 } 1087 1088 /* 1089 * Returns true if the battery is actually present and inserted. 1090 */ 1091 BOOLEAN 1092 acpi_BatteryIsPresent(device_t dev) 1093 { 1094 ACPI_HANDLE h; 1095 ACPI_DEVICE_INFO devinfo; 1096 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 1097 ACPI_STATUS error; 1098 1099 ACPI_ASSERTLOCK; 1100 1101 if ((h = acpi_get_handle(dev)) == NULL) 1102 return (FALSE); 1103 error = AcpiGetObjectInfo(h, &buf); 1104 if (ACPI_FAILURE(error)) 1105 return (FALSE); 1106 1107 /* If no _STA method, must be present */ 1108 if ((devinfo.Valid & ACPI_VALID_STA) == 0) 1109 return (TRUE); 1110 1111 /* Return true for 'present' and 'functioning' */ 1112 if ((devinfo.CurrentStatus & 0x19) == 0x19) 1113 return (TRUE); 1114 1115 return (FALSE); 1116 } 1117 1118 /* 1119 * Match a HID string against a device 1120 */ 1121 BOOLEAN 1122 acpi_MatchHid(device_t dev, char *hid) 1123 { 1124 ACPI_HANDLE h; 1125 ACPI_DEVICE_INFO devinfo; 1126 ACPI_BUFFER buf = {sizeof(devinfo), &devinfo}; 1127 ACPI_STATUS error; 1128 int cid; 1129 1130 ACPI_ASSERTLOCK; 1131 1132 if (hid == NULL) 1133 return (FALSE); 1134 if ((h = acpi_get_handle(dev)) == NULL) 1135 return (FALSE); 1136 error = AcpiGetObjectInfo(h, &buf); 1137 if (ACPI_FAILURE(error)) 1138 return (FALSE); 1139 if ((devinfo.Valid & ACPI_VALID_HID) != 0 && 1140 strcmp(hid, devinfo.HardwareId.Value) == 0) 1141 return (TRUE); 1142 1143 if (ACPI_FAILURE(error = acpi_EvaluateInteger(h, "_CID", &cid))) 1144 return (FALSE); 1145 if (cid == PNP_EISAID(hid)) 1146 return (TRUE); 1147 1148 return (FALSE); 1149 } 1150 1151 /* 1152 * Return the handle of a named object within our scope, ie. that of (parent) 1153 * or one if its parents. 1154 */ 1155 ACPI_STATUS 1156 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1157 { 1158 ACPI_HANDLE r; 1159 ACPI_STATUS status; 1160 1161 ACPI_ASSERTLOCK; 1162 1163 /* Walk back up the tree to the root */ 1164 for (;;) { 1165 status = AcpiGetHandle(parent, path, &r); 1166 if (ACPI_SUCCESS(status)) { 1167 *result = r; 1168 return (AE_OK); 1169 } 1170 if (status != AE_NOT_FOUND) 1171 return (AE_OK); 1172 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1173 return (AE_NOT_FOUND); 1174 parent = r; 1175 } 1176 } 1177 1178 /* 1179 * Allocate a buffer with a preset data size. 1180 */ 1181 ACPI_BUFFER * 1182 acpi_AllocBuffer(int size) 1183 { 1184 ACPI_BUFFER *buf; 1185 1186 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1187 return (NULL); 1188 buf->Length = size; 1189 buf->Pointer = (void *)(buf + 1); 1190 return (buf); 1191 } 1192 1193 /* 1194 * Evaluate a path that should return an integer. 1195 */ 1196 ACPI_STATUS 1197 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1198 { 1199 ACPI_STATUS status; 1200 ACPI_BUFFER buf; 1201 ACPI_OBJECT param; 1202 1203 ACPI_ASSERTLOCK; 1204 1205 if (handle == NULL) 1206 handle = ACPI_ROOT_OBJECT; 1207 1208 /* 1209 * Assume that what we've been pointed at is an Integer object, or 1210 * a method that will return an Integer. 1211 */ 1212 buf.Pointer = ¶m; 1213 buf.Length = sizeof(param); 1214 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1215 if (ACPI_SUCCESS(status)) { 1216 if (param.Type == ACPI_TYPE_INTEGER) 1217 *number = param.Integer.Value; 1218 else 1219 status = AE_TYPE; 1220 } 1221 1222 /* 1223 * In some applications, a method that's expected to return an Integer 1224 * may instead return a Buffer (probably to simplify some internal 1225 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1226 * convert it into an Integer as best we can. 1227 * 1228 * This is a hack. 1229 */ 1230 if (status == AE_BUFFER_OVERFLOW) { 1231 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1232 status = AE_NO_MEMORY; 1233 } else { 1234 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1235 if (ACPI_SUCCESS(status)) 1236 status = acpi_ConvertBufferToInteger(&buf, number); 1237 AcpiOsFree(buf.Pointer); 1238 } 1239 } 1240 return (status); 1241 } 1242 1243 ACPI_STATUS 1244 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1245 { 1246 ACPI_OBJECT *p; 1247 int i; 1248 1249 p = (ACPI_OBJECT *)bufp->Pointer; 1250 if (p->Type == ACPI_TYPE_INTEGER) { 1251 *number = p->Integer.Value; 1252 return (AE_OK); 1253 } 1254 if (p->Type != ACPI_TYPE_BUFFER) 1255 return (AE_TYPE); 1256 if (p->Buffer.Length > sizeof(int)) 1257 return (AE_BAD_DATA); 1258 1259 *number = 0; 1260 for (i = 0; i < p->Buffer.Length; i++) 1261 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1262 return (AE_OK); 1263 } 1264 1265 /* 1266 * Iterate over the elements of an a package object, calling the supplied 1267 * function for each element. 1268 * 1269 * XXX possible enhancement might be to abort traversal on error. 1270 */ 1271 ACPI_STATUS 1272 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1273 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1274 { 1275 ACPI_OBJECT *comp; 1276 int i; 1277 1278 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1279 return (AE_BAD_PARAMETER); 1280 1281 /* Iterate over components */ 1282 i = 0; 1283 comp = pkg->Package.Elements; 1284 for (; i < pkg->Package.Count; i++, comp++) 1285 func(comp, arg); 1286 1287 return (AE_OK); 1288 } 1289 1290 /* 1291 * Find the (index)th resource object in a set. 1292 */ 1293 ACPI_STATUS 1294 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1295 { 1296 ACPI_RESOURCE *rp; 1297 int i; 1298 1299 rp = (ACPI_RESOURCE *)buf->Pointer; 1300 i = index; 1301 while (i-- > 0) { 1302 /* Range check */ 1303 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1304 return (AE_BAD_PARAMETER); 1305 1306 /* Check for terminator */ 1307 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1308 return (AE_NOT_FOUND); 1309 rp = ACPI_RESOURCE_NEXT(rp); 1310 } 1311 if (resp != NULL) 1312 *resp = rp; 1313 1314 return (AE_OK); 1315 } 1316 1317 /* 1318 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1319 * 1320 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1321 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1322 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1323 * resources. 1324 */ 1325 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1326 1327 ACPI_STATUS 1328 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1329 { 1330 ACPI_RESOURCE *rp; 1331 void *newp; 1332 1333 /* Initialise the buffer if necessary. */ 1334 if (buf->Pointer == NULL) { 1335 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1336 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1337 return (AE_NO_MEMORY); 1338 rp = (ACPI_RESOURCE *)buf->Pointer; 1339 rp->Id = ACPI_RSTYPE_END_TAG; 1340 rp->Length = 0; 1341 } 1342 if (res == NULL) 1343 return (AE_OK); 1344 1345 /* 1346 * Scan the current buffer looking for the terminator. 1347 * This will either find the terminator or hit the end 1348 * of the buffer and return an error. 1349 */ 1350 rp = (ACPI_RESOURCE *)buf->Pointer; 1351 for (;;) { 1352 /* Range check, don't go outside the buffer */ 1353 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1354 return (AE_BAD_PARAMETER); 1355 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1356 break; 1357 rp = ACPI_RESOURCE_NEXT(rp); 1358 } 1359 1360 /* 1361 * Check the size of the buffer and expand if required. 1362 * 1363 * Required size is: 1364 * size of existing resources before terminator + 1365 * size of new resource and header + 1366 * size of terminator. 1367 * 1368 * Note that this loop should really only run once, unless 1369 * for some reason we are stuffing a *really* huge resource. 1370 */ 1371 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1372 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1373 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1374 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1375 return (AE_NO_MEMORY); 1376 bcopy(buf->Pointer, newp, buf->Length); 1377 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1378 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1379 AcpiOsFree(buf->Pointer); 1380 buf->Pointer = newp; 1381 buf->Length += buf->Length; 1382 } 1383 1384 /* Insert the new resource. */ 1385 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1386 1387 /* And add the terminator. */ 1388 rp = ACPI_RESOURCE_NEXT(rp); 1389 rp->Id = ACPI_RSTYPE_END_TAG; 1390 rp->Length = 0; 1391 1392 return (AE_OK); 1393 } 1394 1395 /* 1396 * Set interrupt model. 1397 */ 1398 ACPI_STATUS 1399 acpi_SetIntrModel(int model) 1400 { 1401 ACPI_OBJECT_LIST ArgList; 1402 ACPI_OBJECT Arg; 1403 1404 Arg.Type = ACPI_TYPE_INTEGER; 1405 Arg.Integer.Value = model; 1406 ArgList.Count = 1; 1407 ArgList.Pointer = &Arg; 1408 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1409 } 1410 1411 #define ACPI_MINIMUM_AWAKETIME 5 1412 1413 static void 1414 acpi_sleep_enable(void *arg) 1415 { 1416 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1417 } 1418 1419 /* 1420 * Set the system sleep state 1421 * 1422 * Currently we support S1-S5 but S4 is only S4BIOS 1423 */ 1424 ACPI_STATUS 1425 acpi_SetSleepState(struct acpi_softc *sc, int state) 1426 { 1427 ACPI_STATUS status = AE_OK; 1428 UINT8 TypeA; 1429 UINT8 TypeB; 1430 1431 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1432 ACPI_ASSERTLOCK; 1433 1434 /* Avoid reentry if already attempting to suspend. */ 1435 if (sc->acpi_sstate != ACPI_STATE_S0) 1436 return_ACPI_STATUS (AE_BAD_PARAMETER); 1437 1438 /* We recently woke up so don't suspend again for a while. */ 1439 if (sc->acpi_sleep_disabled) 1440 return_ACPI_STATUS (AE_OK); 1441 1442 switch (state) { 1443 case ACPI_STATE_S1: 1444 case ACPI_STATE_S2: 1445 case ACPI_STATE_S3: 1446 case ACPI_STATE_S4: 1447 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1448 if (status == AE_NOT_FOUND) { 1449 device_printf(sc->acpi_dev, 1450 "Sleep state S%d not supported by BIOS\n", state); 1451 break; 1452 } else if (ACPI_FAILURE(status)) { 1453 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1454 AcpiFormatException(status)); 1455 break; 1456 } 1457 1458 sc->acpi_sstate = state; 1459 sc->acpi_sleep_disabled = 1; 1460 1461 /* Inform all devices that we are going to sleep. */ 1462 if (DEVICE_SUSPEND(root_bus) != 0) { 1463 /* 1464 * Re-wake the system. 1465 * 1466 * XXX note that a better two-pass approach with a 'veto' pass 1467 * followed by a "real thing" pass would be better, but the 1468 * current bus interface does not provide for this. 1469 */ 1470 DEVICE_RESUME(root_bus); 1471 return_ACPI_STATUS (AE_ERROR); 1472 } 1473 1474 status = AcpiEnterSleepStatePrep(state); 1475 if (ACPI_FAILURE(status)) { 1476 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1477 AcpiFormatException(status)); 1478 break; 1479 } 1480 1481 if (sc->acpi_sleep_delay > 0) 1482 DELAY(sc->acpi_sleep_delay * 1000000); 1483 1484 if (state != ACPI_STATE_S1) { 1485 acpi_sleep_machdep(sc, state); 1486 1487 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1488 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1489 ACPI_MUTEX_NOT_ACQUIRED) { 1490 1491 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1492 } 1493 1494 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1495 if (state == ACPI_STATE_S4) 1496 AcpiEnable(); 1497 } else { 1498 status = AcpiEnterSleepState((UINT8)state); 1499 if (ACPI_FAILURE(status)) { 1500 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1501 AcpiFormatException(status)); 1502 break; 1503 } 1504 } 1505 AcpiLeaveSleepState((UINT8)state); 1506 DEVICE_RESUME(root_bus); 1507 sc->acpi_sstate = ACPI_STATE_S0; 1508 acpi_enable_fixed_events(sc); 1509 break; 1510 case ACPI_STATE_S5: 1511 /* 1512 * Shut down cleanly and power off. This will call us back through the 1513 * shutdown handlers. 1514 */ 1515 shutdown_nice(RB_POWEROFF); 1516 break; 1517 case ACPI_STATE_S0: 1518 default: 1519 status = AE_BAD_PARAMETER; 1520 break; 1521 } 1522 1523 /* Disable a second sleep request for a short period */ 1524 if (sc->acpi_sleep_disabled) 1525 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1526 1527 return_ACPI_STATUS (status); 1528 } 1529 1530 /* 1531 * Enable/Disable ACPI 1532 */ 1533 ACPI_STATUS 1534 acpi_Enable(struct acpi_softc *sc) 1535 { 1536 ACPI_STATUS status; 1537 u_int32_t flags; 1538 1539 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1540 ACPI_ASSERTLOCK; 1541 1542 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1543 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1544 if (!sc->acpi_enabled) 1545 status = AcpiEnableSubsystem(flags); 1546 else 1547 status = AE_OK; 1548 1549 if (status == AE_OK) 1550 sc->acpi_enabled = 1; 1551 1552 return_ACPI_STATUS (status); 1553 } 1554 1555 ACPI_STATUS 1556 acpi_Disable(struct acpi_softc *sc) 1557 { 1558 ACPI_STATUS status; 1559 1560 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1561 ACPI_ASSERTLOCK; 1562 1563 if (sc->acpi_enabled) 1564 status = AcpiDisable(); 1565 else 1566 status = AE_OK; 1567 1568 if (status == AE_OK) 1569 sc->acpi_enabled = 0; 1570 1571 return_ACPI_STATUS (status); 1572 } 1573 1574 /* 1575 * ACPI Event Handlers 1576 */ 1577 1578 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1579 1580 static void 1581 acpi_system_eventhandler_sleep(void *arg, int state) 1582 { 1583 ACPI_LOCK_DECL; 1584 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1585 1586 ACPI_LOCK; 1587 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1588 acpi_SetSleepState((struct acpi_softc *)arg, state); 1589 ACPI_UNLOCK; 1590 return_VOID; 1591 } 1592 1593 static void 1594 acpi_system_eventhandler_wakeup(void *arg, int state) 1595 { 1596 ACPI_LOCK_DECL; 1597 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1598 1599 /* Well, what to do? :-) */ 1600 1601 ACPI_LOCK; 1602 ACPI_UNLOCK; 1603 1604 return_VOID; 1605 } 1606 1607 /* 1608 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1609 */ 1610 UINT32 1611 acpi_eventhandler_power_button_for_sleep(void *context) 1612 { 1613 struct acpi_softc *sc = (struct acpi_softc *)context; 1614 1615 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1616 1617 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1618 1619 return_VALUE (ACPI_INTERRUPT_HANDLED); 1620 } 1621 1622 UINT32 1623 acpi_eventhandler_power_button_for_wakeup(void *context) 1624 { 1625 struct acpi_softc *sc = (struct acpi_softc *)context; 1626 1627 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1628 1629 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1630 1631 return_VALUE (ACPI_INTERRUPT_HANDLED); 1632 } 1633 1634 UINT32 1635 acpi_eventhandler_sleep_button_for_sleep(void *context) 1636 { 1637 struct acpi_softc *sc = (struct acpi_softc *)context; 1638 1639 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1640 1641 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1642 1643 return_VALUE (ACPI_INTERRUPT_HANDLED); 1644 } 1645 1646 UINT32 1647 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1648 { 1649 struct acpi_softc *sc = (struct acpi_softc *)context; 1650 1651 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1652 1653 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1654 1655 return_VALUE (ACPI_INTERRUPT_HANDLED); 1656 } 1657 1658 /* 1659 * XXX This is kinda ugly, and should not be here. 1660 */ 1661 struct acpi_staticbuf { 1662 ACPI_BUFFER buffer; 1663 char data[512]; 1664 }; 1665 1666 char * 1667 acpi_name(ACPI_HANDLE handle) 1668 { 1669 static struct acpi_staticbuf buf; 1670 1671 ACPI_ASSERTLOCK; 1672 1673 buf.buffer.Length = 512; 1674 buf.buffer.Pointer = &buf.data[0]; 1675 1676 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1677 return (buf.buffer.Pointer); 1678 1679 return ("(unknown path)"); 1680 } 1681 1682 /* 1683 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1684 * parts of the namespace. 1685 */ 1686 int 1687 acpi_avoid(ACPI_HANDLE handle) 1688 { 1689 char *cp, *env, *np; 1690 int len; 1691 1692 np = acpi_name(handle); 1693 if (*np == '\\') 1694 np++; 1695 if ((env = getenv("debug.acpi.avoid")) == NULL) 1696 return (0); 1697 1698 /* Scan the avoid list checking for a match */ 1699 cp = env; 1700 for (;;) { 1701 while ((*cp != 0) && isspace(*cp)) 1702 cp++; 1703 if (*cp == 0) 1704 break; 1705 len = 0; 1706 while ((cp[len] != 0) && !isspace(cp[len])) 1707 len++; 1708 if (!strncmp(cp, np, len)) { 1709 freeenv(env); 1710 return(1); 1711 } 1712 cp += len; 1713 } 1714 freeenv(env); 1715 1716 return (0); 1717 } 1718 1719 /* 1720 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1721 */ 1722 int 1723 acpi_disabled(char *subsys) 1724 { 1725 char *cp, *env; 1726 int len; 1727 1728 if ((env = getenv("debug.acpi.disable")) == NULL) 1729 return (0); 1730 if (!strcmp(env, "all")) { 1731 freeenv(env); 1732 return (1); 1733 } 1734 1735 /* scan the disable list checking for a match */ 1736 cp = env; 1737 for (;;) { 1738 while ((*cp != 0) && isspace(*cp)) 1739 cp++; 1740 if (*cp == 0) 1741 break; 1742 len = 0; 1743 while ((cp[len] != 0) && !isspace(cp[len])) 1744 len++; 1745 if (!strncmp(cp, subsys, len)) { 1746 freeenv(env); 1747 return (1); 1748 } 1749 cp += len; 1750 } 1751 freeenv(env); 1752 1753 return (0); 1754 } 1755 1756 /* 1757 * Device wake capability enable/disable. 1758 */ 1759 void 1760 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1761 { 1762 ACPI_OBJECT_LIST ArgList; 1763 ACPI_OBJECT Arg; 1764 1765 /* 1766 * TBD: All Power Resources referenced by elements 2 through N 1767 * of the _PRW object are put into the ON state. 1768 */ 1769 1770 ArgList.Count = 1; 1771 ArgList.Pointer = &Arg; 1772 1773 Arg.Type = ACPI_TYPE_INTEGER; 1774 Arg.Integer.Value = enable; 1775 1776 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1777 } 1778 1779 void 1780 acpi_device_enable_wake_event(ACPI_HANDLE h) 1781 { 1782 struct acpi_softc *sc; 1783 ACPI_STATUS status; 1784 ACPI_BUFFER prw_buffer; 1785 ACPI_OBJECT *res; 1786 1787 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1788 1789 sc = devclass_get_softc(acpi_devclass, 0); 1790 if (sc == NULL) 1791 return; 1792 1793 /* 1794 * _PRW object is only required for devices that have the ability 1795 * to wake the system from a system sleeping state. 1796 */ 1797 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1798 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1799 if (ACPI_FAILURE(status)) 1800 return; 1801 1802 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1803 if (res == NULL) 1804 return; 1805 1806 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1807 goto out; 1808 } 1809 1810 /* 1811 * The element 1 of the _PRW object: 1812 * The lowest power system sleeping state that can be entered 1813 * while still providing wake functionality. 1814 * The sleeping state being entered must be greater or equal to 1815 * the power state declared in element 1 of the _PRW object. 1816 */ 1817 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) 1818 goto out; 1819 1820 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) 1821 goto out; 1822 1823 /* 1824 * The element 0 of the _PRW object: 1825 */ 1826 switch(res->Package.Elements[0].Type) { 1827 case ACPI_TYPE_INTEGER: 1828 /* 1829 * If the data type of this package element is numeric, then this 1830 * _PRW package element is the bit index in the GPEx_EN, in the 1831 * GPE blocks described in the FADT, of the enable bit that is 1832 * enabled for the wake event. 1833 */ 1834 1835 status = AcpiEnableGpe(NULL, res->Package.Elements[0].Integer.Value, 1836 ACPI_EVENT_WAKE_ENABLE); 1837 if (ACPI_FAILURE(status)) 1838 printf("%s: EnableEvent Failed\n", __func__); 1839 break; 1840 case ACPI_TYPE_PACKAGE: 1841 /* 1842 * XXX TBD 1843 * 1844 * If the data type of this package element is a package, then this 1845 * _PRW package element is itself a package containing two 1846 * elements. The first is an object reference to the GPE Block 1847 * device that contains the GPE that will be triggered by the wake 1848 * event. The second element is numeric and it contains the bit 1849 * index in the GPEx_EN, in the GPE Block referenced by the 1850 * first element in the package, of the enable bit that is enabled for 1851 * the wake event. 1852 * For example, if this field is a package then it is of the form: 1853 * Package() {\_SB.PCI0.ISA.GPE, 2} 1854 */ 1855 break; 1856 default: 1857 break; 1858 } 1859 1860 out: 1861 if (prw_buffer.Pointer != NULL) 1862 AcpiOsFree(prw_buffer.Pointer); 1863 } 1864 1865 /* 1866 * Control interface. 1867 * 1868 * We multiplex ioctls for all participating ACPI devices here. Individual 1869 * drivers wanting to be accessible via /dev/acpi should use the 1870 * register/deregister interface to make their handlers visible. 1871 */ 1872 struct acpi_ioctl_hook 1873 { 1874 TAILQ_ENTRY(acpi_ioctl_hook) link; 1875 u_long cmd; 1876 acpi_ioctl_fn fn; 1877 void *arg; 1878 }; 1879 1880 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1881 static int acpi_ioctl_hooks_initted; 1882 1883 /* 1884 * Register an ioctl handler. 1885 */ 1886 int 1887 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 1888 { 1889 struct acpi_ioctl_hook *hp; 1890 1891 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1892 return (ENOMEM); 1893 hp->cmd = cmd; 1894 hp->fn = fn; 1895 hp->arg = arg; 1896 if (acpi_ioctl_hooks_initted == 0) { 1897 TAILQ_INIT(&acpi_ioctl_hooks); 1898 acpi_ioctl_hooks_initted = 1; 1899 } 1900 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1901 return (0); 1902 } 1903 1904 /* 1905 * Deregister an ioctl handler. 1906 */ 1907 void 1908 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 1909 { 1910 struct acpi_ioctl_hook *hp; 1911 1912 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1913 if ((hp->cmd == cmd) && (hp->fn == fn)) 1914 break; 1915 1916 if (hp != NULL) { 1917 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1918 free(hp, M_ACPIDEV); 1919 } 1920 } 1921 1922 static int 1923 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 1924 { 1925 return (0); 1926 } 1927 1928 static int 1929 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 1930 { 1931 return (0); 1932 } 1933 1934 static int 1935 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 1936 { 1937 struct acpi_softc *sc; 1938 struct acpi_ioctl_hook *hp; 1939 int error, xerror, state; 1940 ACPI_LOCK_DECL; 1941 1942 ACPI_LOCK; 1943 1944 error = state = 0; 1945 sc = dev->si_drv1; 1946 1947 /* 1948 * Scan the list of registered ioctls, looking for handlers. 1949 */ 1950 if (acpi_ioctl_hooks_initted) { 1951 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1952 if (hp->cmd == cmd) { 1953 xerror = hp->fn(cmd, addr, hp->arg); 1954 if (xerror != 0) 1955 error = xerror; 1956 goto out; 1957 } 1958 } 1959 } 1960 1961 /* 1962 * Core ioctls are not permitted for non-writable user. 1963 * Currently, other ioctls just fetch information. 1964 * Not changing system behavior. 1965 */ 1966 if((flag & FWRITE) == 0) 1967 return (EPERM); 1968 1969 /* Core system ioctls. */ 1970 switch (cmd) { 1971 case ACPIIO_ENABLE: 1972 if (ACPI_FAILURE(acpi_Enable(sc))) 1973 error = ENXIO; 1974 break; 1975 case ACPIIO_DISABLE: 1976 if (ACPI_FAILURE(acpi_Disable(sc))) 1977 error = ENXIO; 1978 break; 1979 case ACPIIO_SETSLPSTATE: 1980 if (!sc->acpi_enabled) { 1981 error = ENXIO; 1982 break; 1983 } 1984 state = *(int *)addr; 1985 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1986 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 1987 error = EINVAL; 1988 } else { 1989 error = EINVAL; 1990 } 1991 break; 1992 default: 1993 if (error == 0) 1994 error = EINVAL; 1995 break; 1996 } 1997 1998 out: 1999 ACPI_UNLOCK; 2000 return (error); 2001 } 2002 2003 static int 2004 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2005 { 2006 char sleep_state[4]; 2007 char buf[16]; 2008 int error; 2009 UINT8 state, TypeA, TypeB; 2010 2011 buf[0] = '\0'; 2012 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 2013 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2014 sprintf(sleep_state, "S%d ", state); 2015 strcat(buf, sleep_state); 2016 } 2017 } 2018 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2019 return (error); 2020 } 2021 2022 static int 2023 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2024 { 2025 char sleep_state[10]; 2026 int error; 2027 u_int new_state, old_state; 2028 2029 old_state = *(u_int *)oidp->oid_arg1; 2030 if (old_state > ACPI_S_STATES_MAX+1) { 2031 strcpy(sleep_state, "unknown"); 2032 } else { 2033 bzero(sleep_state, sizeof(sleep_state)); 2034 strncpy(sleep_state, sleep_state_names[old_state], 2035 sizeof(sleep_state_names[old_state])); 2036 } 2037 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2038 if (error == 0 && req->newptr != NULL) { 2039 new_state = ACPI_STATE_S0; 2040 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2041 if (strncmp(sleep_state, sleep_state_names[new_state], 2042 sizeof(sleep_state)) == 0) 2043 break; 2044 } 2045 if (new_state <= ACPI_S_STATES_MAX + 1) { 2046 if (new_state != old_state) 2047 *(u_int *)oidp->oid_arg1 = new_state; 2048 } else { 2049 error = EINVAL; 2050 } 2051 } 2052 2053 return (error); 2054 } 2055 2056 #ifdef ACPI_DEBUG 2057 /* 2058 * Support for parsing debug options from the kernel environment. 2059 * 2060 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2061 * by specifying the names of the bits in the debug.acpi.layer and 2062 * debug.acpi.level environment variables. Bits may be unset by 2063 * prefixing the bit name with !. 2064 */ 2065 struct debugtag 2066 { 2067 char *name; 2068 UINT32 value; 2069 }; 2070 2071 static struct debugtag dbg_layer[] = { 2072 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2073 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2074 {"ACPI_EVENTS", ACPI_EVENTS}, 2075 {"ACPI_TABLES", ACPI_TABLES}, 2076 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2077 {"ACPI_PARSER", ACPI_PARSER}, 2078 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2079 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2080 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2081 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2082 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2083 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2084 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2085 2086 {"ACPI_BUS", ACPI_BUS}, 2087 {"ACPI_SYSTEM", ACPI_SYSTEM}, 2088 {"ACPI_POWER", ACPI_POWER}, 2089 {"ACPI_EC", ACPI_EC}, 2090 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2091 {"ACPI_BATTERY", ACPI_BATTERY}, 2092 {"ACPI_BUTTON", ACPI_BUTTON}, 2093 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2094 {"ACPI_THERMAL", ACPI_THERMAL}, 2095 {"ACPI_FAN", ACPI_FAN}, 2096 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2097 {NULL, 0} 2098 }; 2099 2100 static struct debugtag dbg_level[] = { 2101 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2102 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2103 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2104 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2105 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2106 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2107 2108 /* Trace verbosity level 1 [Standard Trace Level] */ 2109 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2110 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2111 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2112 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2113 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2114 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2115 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2116 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2117 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2118 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2119 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2120 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2121 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2122 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2123 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2124 2125 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2126 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2127 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2128 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2129 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2130 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2131 2132 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2133 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2134 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2135 {"ACPI_LV_IO", ACPI_LV_IO}, 2136 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2137 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2138 2139 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2140 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2141 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2142 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2143 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2144 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2145 {NULL, 0} 2146 }; 2147 2148 static void 2149 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2150 { 2151 char *ep; 2152 int i, l; 2153 int set; 2154 2155 while (*cp) { 2156 if (isspace(*cp)) { 2157 cp++; 2158 continue; 2159 } 2160 ep = cp; 2161 while (*ep && !isspace(*ep)) 2162 ep++; 2163 if (*cp == '!') { 2164 set = 0; 2165 cp++; 2166 if (cp == ep) 2167 continue; 2168 } else { 2169 set = 1; 2170 } 2171 l = ep - cp; 2172 for (i = 0; tag[i].name != NULL; i++) { 2173 if (!strncmp(cp, tag[i].name, l)) { 2174 if (set) 2175 *flag |= tag[i].value; 2176 else 2177 *flag &= ~tag[i].value; 2178 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2179 } 2180 } 2181 cp = ep; 2182 } 2183 } 2184 2185 static void 2186 acpi_set_debugging(void *junk) 2187 { 2188 char *cp; 2189 2190 if (!cold) 2191 return; 2192 2193 AcpiDbgLayer = 0; 2194 AcpiDbgLevel = 0; 2195 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2196 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2197 freeenv(cp); 2198 } 2199 if ((cp = getenv("debug.acpi.level")) != NULL) { 2200 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2201 freeenv(cp); 2202 } 2203 2204 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, 2205 AcpiDbgLevel); 2206 } 2207 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2208 NULL); 2209 #endif 2210 2211 static int 2212 acpi_pm_func(u_long cmd, void *arg, ...) 2213 { 2214 int state, acpi_state; 2215 int error; 2216 struct acpi_softc *sc; 2217 va_list ap; 2218 2219 error = 0; 2220 switch (cmd) { 2221 case POWER_CMD_SUSPEND: 2222 sc = (struct acpi_softc *)arg; 2223 if (sc == NULL) { 2224 error = EINVAL; 2225 goto out; 2226 } 2227 2228 va_start(ap, arg); 2229 state = va_arg(ap, int); 2230 va_end(ap); 2231 2232 switch (state) { 2233 case POWER_SLEEP_STATE_STANDBY: 2234 acpi_state = sc->acpi_standby_sx; 2235 break; 2236 case POWER_SLEEP_STATE_SUSPEND: 2237 acpi_state = sc->acpi_suspend_sx; 2238 break; 2239 case POWER_SLEEP_STATE_HIBERNATE: 2240 acpi_state = ACPI_STATE_S4; 2241 break; 2242 default: 2243 error = EINVAL; 2244 goto out; 2245 } 2246 2247 acpi_SetSleepState(sc, acpi_state); 2248 break; 2249 default: 2250 error = EINVAL; 2251 goto out; 2252 } 2253 2254 out: 2255 return (error); 2256 } 2257 2258 static void 2259 acpi_pm_register(void *arg) 2260 { 2261 if (!cold || resource_disabled("acpi", 0)) 2262 return; 2263 2264 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2265 } 2266 2267 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2268