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 #include <sys/sbuf.h> 47 48 #include <machine/clock.h> 49 #include <machine/resource.h> 50 #include <machine/bus.h> 51 #include <sys/rman.h> 52 #include <isa/isavar.h> 53 54 #include "acpi.h" 55 #include <dev/acpica/acpivar.h> 56 #include <dev/acpica/acpiio.h> 57 #include <contrib/dev/acpica/acnamesp.h> 58 59 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 60 61 /* Hooks for the ACPI CA debugging infrastructure */ 62 #define _COMPONENT ACPI_BUS 63 ACPI_MODULE_NAME("ACPI") 64 65 static d_open_t acpiopen; 66 static d_close_t acpiclose; 67 static d_ioctl_t acpiioctl; 68 69 #define CDEV_MAJOR 152 70 static struct cdevsw acpi_cdevsw = { 71 .d_open = acpiopen, 72 .d_close = acpiclose, 73 .d_ioctl = acpiioctl, 74 .d_name = "acpi", 75 .d_maj = CDEV_MAJOR, 76 }; 77 78 static const char* sleep_state_names[] = { 79 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 80 81 /* this has to be static, as the softc is gone when we need it */ 82 static int acpi_off_state = ACPI_STATE_S5; 83 84 #if __FreeBSD_version >= 500000 85 struct mtx acpi_mutex; 86 #endif 87 88 static int acpi_modevent(struct module *mod, int event, void *junk); 89 static void acpi_identify(driver_t *driver, device_t parent); 90 static int acpi_probe(device_t dev); 91 static int acpi_attach(device_t dev); 92 static device_t acpi_add_child(device_t bus, int order, const char *name, 93 int unit); 94 static int acpi_print_child(device_t bus, device_t child); 95 static int acpi_read_ivar(device_t dev, device_t child, int index, 96 uintptr_t *result); 97 static int acpi_write_ivar(device_t dev, device_t child, int index, 98 uintptr_t value); 99 static int acpi_set_resource(device_t dev, device_t child, int type, 100 int rid, u_long start, u_long count); 101 static int acpi_get_resource(device_t dev, device_t child, int type, 102 int rid, u_long *startp, u_long *countp); 103 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 104 int type, int *rid, u_long start, u_long end, 105 u_long count, u_int flags); 106 static int acpi_release_resource(device_t bus, device_t child, int type, 107 int rid, struct resource *r); 108 static uint32_t acpi_isa_get_logicalid(device_t dev); 109 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 110 static int acpi_isa_pnp_probe(device_t bus, device_t child, 111 struct isa_pnp_id *ids); 112 static void acpi_probe_children(device_t bus); 113 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 114 void *context, void **status); 115 static void acpi_shutdown_pre_sync(void *arg, int howto); 116 static void acpi_shutdown_final(void *arg, int howto); 117 static void acpi_enable_fixed_events(struct acpi_softc *sc); 118 static void acpi_system_eventhandler_sleep(void *arg, int state); 119 static void acpi_system_eventhandler_wakeup(void *arg, int state); 120 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 121 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 122 static int acpi_pm_func(u_long cmd, void *arg, ...); 123 124 static device_method_t acpi_methods[] = { 125 /* Device interface */ 126 DEVMETHOD(device_identify, acpi_identify), 127 DEVMETHOD(device_probe, acpi_probe), 128 DEVMETHOD(device_attach, acpi_attach), 129 DEVMETHOD(device_detach, bus_generic_detach), 130 DEVMETHOD(device_shutdown, bus_generic_shutdown), 131 DEVMETHOD(device_suspend, bus_generic_suspend), 132 DEVMETHOD(device_resume, bus_generic_resume), 133 134 /* Bus interface */ 135 DEVMETHOD(bus_add_child, acpi_add_child), 136 DEVMETHOD(bus_print_child, acpi_print_child), 137 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 138 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 139 DEVMETHOD(bus_set_resource, acpi_set_resource), 140 DEVMETHOD(bus_get_resource, acpi_get_resource), 141 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 142 DEVMETHOD(bus_release_resource, acpi_release_resource), 143 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 144 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 145 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 146 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 147 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 148 149 /* ISA emulation */ 150 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 151 152 {0, 0} 153 }; 154 155 static driver_t acpi_driver = { 156 "acpi", 157 acpi_methods, 158 sizeof(struct acpi_softc), 159 }; 160 161 static devclass_t acpi_devclass; 162 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 163 MODULE_VERSION(acpi, 100); 164 165 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 166 static char acpi_ca_version[12]; 167 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 168 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 169 170 /* 171 * ACPI can only be loaded as a module by the loader; activating it after 172 * system bootstrap time is not useful, and can be fatal to the system. 173 * It also cannot be unloaded, since the entire system bus heirarchy hangs 174 * off it. 175 */ 176 static int 177 acpi_modevent(struct module *mod, int event, void *junk) 178 { 179 switch(event) { 180 case MOD_LOAD: 181 if (!cold) { 182 printf("The ACPI driver cannot be loaded after boot.\n"); 183 return (EPERM); 184 } 185 break; 186 case MOD_UNLOAD: 187 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 188 return (EBUSY); 189 break; 190 default: 191 break; 192 } 193 return (0); 194 } 195 196 /* 197 * Detect ACPI, perform early initialisation 198 */ 199 static void 200 acpi_identify(driver_t *driver, device_t parent) 201 { 202 device_t child; 203 int error; 204 #ifdef ACPI_DEBUGGER 205 char *debugpoint; 206 #endif 207 208 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 209 210 if (!cold) 211 return_VOID; 212 213 /* Check that we haven't been disabled with a hint. */ 214 if (resource_disabled("acpi", 0)) 215 return_VOID; 216 217 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "0x%x", 218 ACPI_CA_VERSION); 219 220 /* Make sure we're not being doubly invoked. */ 221 if (device_find_child(parent, "acpi", 0) != NULL) 222 return_VOID; 223 224 #if __FreeBSD_version >= 500000 225 /* Initialise the ACPI mutex */ 226 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 227 #endif 228 229 /* Start up the ACPI CA subsystem. */ 230 #ifdef ACPI_DEBUGGER 231 debugpoint = getenv("debug.acpi.debugger"); 232 if (debugpoint) { 233 if (!strcmp(debugpoint, "init")) 234 acpi_EnterDebugger(); 235 freeenv(debugpoint); 236 } 237 #endif 238 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 239 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 240 return_VOID; 241 } 242 #ifdef ACPI_DEBUGGER 243 debugpoint = getenv("debug.acpi.debugger"); 244 if (debugpoint) { 245 if (!strcmp(debugpoint, "tables")) 246 acpi_EnterDebugger(); 247 freeenv(debugpoint); 248 } 249 #endif 250 251 if (ACPI_FAILURE(error = AcpiLoadTables())) { 252 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 253 return_VOID; 254 } 255 256 /* Attach the actual ACPI device. */ 257 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 258 device_printf(parent, "ACPI: could not attach\n"); 259 return_VOID; 260 } 261 } 262 263 /* 264 * Fetch some descriptive data from ACPI to put in our attach message 265 */ 266 static int 267 acpi_probe(device_t dev) 268 { 269 ACPI_TABLE_HEADER th; 270 char buf[20]; 271 ACPI_STATUS status; 272 int error; 273 ACPI_LOCK_DECL; 274 275 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 276 277 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 278 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 279 280 device_printf(dev, "Other PM system enabled.\n"); 281 return_VALUE(ENXIO); 282 } 283 284 ACPI_LOCK; 285 286 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 287 device_printf(dev, "couldn't get XSDT header: %s\n", 288 AcpiFormatException(status)); 289 error = ENXIO; 290 } else { 291 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 292 device_set_desc_copy(dev, buf); 293 error = 0; 294 } 295 ACPI_UNLOCK; 296 return_VALUE(error); 297 } 298 299 static int 300 acpi_attach(device_t dev) 301 { 302 struct acpi_softc *sc; 303 ACPI_STATUS status; 304 int error; 305 UINT32 flags; 306 char *env; 307 #ifdef ACPI_DEBUGGER 308 char *debugpoint; 309 #endif 310 ACPI_LOCK_DECL; 311 312 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 313 ACPI_LOCK; 314 sc = device_get_softc(dev); 315 bzero(sc, sizeof(*sc)); 316 sc->acpi_dev = dev; 317 318 #ifdef ACPI_DEBUGGER 319 debugpoint = getenv("debug.acpi.debugger"); 320 if (debugpoint) { 321 if (!strcmp(debugpoint, "spaces")) 322 acpi_EnterDebugger(); 323 freeenv(debugpoint); 324 } 325 #endif 326 327 /* Install the default address space handlers. */ 328 error = ENXIO; 329 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 330 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 331 if (ACPI_FAILURE(status)) { 332 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 333 AcpiFormatException(status)); 334 goto out; 335 } 336 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 337 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 338 if (ACPI_FAILURE(status)) { 339 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 340 AcpiFormatException(status)); 341 goto out; 342 } 343 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 344 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 345 if (ACPI_FAILURE(status)) { 346 device_printf(dev, "could not initialise PciConfig handler: %s\n", 347 AcpiFormatException(status)); 348 goto out; 349 } 350 351 /* 352 * Bring ACPI fully online. 353 * 354 * Note that some systems (specifically, those with namespace evaluation 355 * issues that require the avoidance of parts of the namespace) must 356 * avoid running _INI and _STA on everything, as well as dodging the final 357 * object init pass. 358 * 359 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 360 * 361 * XXX We should arrange for the object init pass after we have attached 362 * all our child devices, but on many systems it works here. 363 */ 364 #ifdef ACPI_DEBUGGER 365 debugpoint = getenv("debug.acpi.debugger"); 366 if (debugpoint) { 367 if (!strcmp(debugpoint, "enable")) 368 acpi_EnterDebugger(); 369 freeenv(debugpoint); 370 } 371 #endif 372 flags = 0; 373 if (testenv("debug.acpi.avoid")) 374 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 375 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 376 device_printf(dev, "Could not enable ACPI: %s\n", 377 AcpiFormatException(status)); 378 goto out; 379 } 380 381 /* 382 * Call the ECDT probe function to provide EC functionality before 383 * the namespace has been evaluated. 384 */ 385 acpi_ec_ecdt_probe(dev); 386 387 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 388 device_printf(dev, "Could not initialize ACPI objects: %s\n", 389 AcpiFormatException(status)); 390 goto out; 391 } 392 393 /* 394 * Setup our sysctl tree. 395 * 396 * XXX: This doesn't check to make sure that none of these fail. 397 */ 398 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 399 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 400 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 401 device_get_name(dev), CTLFLAG_RD, 0, ""); 402 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 403 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 404 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 405 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 406 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 407 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 408 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 409 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 410 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 411 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 412 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 413 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 414 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 415 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 416 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 417 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 418 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 419 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 420 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 421 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 422 &sc->acpi_sleep_delay, 0, "sleep delay"); 423 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 424 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 425 &sc->acpi_s4bios, 0, "S4BIOS mode"); 426 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 427 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 428 &sc->acpi_verbose, 0, "verbose mode"); 429 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 430 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 431 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 432 433 /* 434 * Default to 5 seconds before sleeping to give some machines time to 435 * stabilize. 436 */ 437 sc->acpi_sleep_delay = 5; 438 sc->acpi_disable_on_poweroff = 1; 439 if (bootverbose) 440 sc->acpi_verbose = 1; 441 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 442 sc->acpi_verbose = 1; 443 freeenv(env); 444 } 445 446 /* Only enable S4BIOS by default if the FACS says it is available. */ 447 if (AcpiGbl_FACS->S4Bios_f != 0) 448 sc->acpi_s4bios = 1; 449 450 /* 451 * Dispatch the default sleep state to devices. 452 * TBD: should be configured from userland policy manager. 453 */ 454 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 455 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 456 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 457 sc->acpi_standby_sx = ACPI_STATE_S1; 458 sc->acpi_suspend_sx = ACPI_STATE_S3; 459 460 acpi_enable_fixed_events(sc); 461 462 /* 463 * Scan the namespace and attach/initialise children. 464 */ 465 #ifdef ACPI_DEBUGGER 466 debugpoint = getenv("debug.acpi.debugger"); 467 if (debugpoint) { 468 if (!strcmp(debugpoint, "probe")) 469 acpi_EnterDebugger(); 470 freeenv(debugpoint); 471 } 472 #endif 473 474 /* Register our shutdown handlers */ 475 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 476 SHUTDOWN_PRI_LAST); 477 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 478 SHUTDOWN_PRI_LAST); 479 480 /* 481 * Register our acpi event handlers. 482 * XXX should be configurable eg. via userland policy manager. 483 */ 484 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 485 sc, ACPI_EVENT_PRI_LAST); 486 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 487 sc, ACPI_EVENT_PRI_LAST); 488 489 /* Flag our initial states. */ 490 sc->acpi_enabled = 1; 491 sc->acpi_sstate = ACPI_STATE_S0; 492 sc->acpi_sleep_disabled = 0; 493 494 /* Create the control device */ 495 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 496 "acpi"); 497 sc->acpi_dev_t->si_drv1 = sc; 498 499 #ifdef ACPI_DEBUGGER 500 debugpoint = getenv("debug.acpi.debugger"); 501 if (debugpoint) { 502 if (strcmp(debugpoint, "running") == 0) 503 acpi_EnterDebugger(); 504 freeenv(debugpoint); 505 } 506 #endif 507 508 #ifdef ACPI_USE_THREADS 509 if ((error = acpi_task_thread_init())) 510 goto out; 511 #endif 512 513 if ((error = acpi_machdep_init(dev))) 514 goto out; 515 516 /* Register ACPI again to pass the correct argument of pm_func. */ 517 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 518 519 if (!acpi_disabled("bus")) 520 acpi_probe_children(dev); 521 522 error = 0; 523 524 out: 525 ACPI_UNLOCK; 526 return_VALUE (error); 527 } 528 529 /* 530 * Handle a new device being added 531 */ 532 static device_t 533 acpi_add_child(device_t bus, int order, const char *name, int unit) 534 { 535 struct acpi_device *ad; 536 device_t child; 537 538 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 539 return (NULL); 540 541 resource_list_init(&ad->ad_rl); 542 543 child = device_add_child_ordered(bus, order, name, unit); 544 if (child != NULL) 545 device_set_ivars(child, ad); 546 return (child); 547 } 548 549 static int 550 acpi_print_child(device_t bus, device_t child) 551 { 552 struct acpi_device *adev = device_get_ivars(child); 553 struct resource_list *rl = &adev->ad_rl; 554 int retval = 0; 555 556 retval += bus_print_child_header(bus, child); 557 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 558 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 559 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 560 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 561 retval += bus_print_child_footer(bus, child); 562 563 return (retval); 564 } 565 566 567 /* 568 * Handle per-device ivars 569 */ 570 static int 571 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 572 { 573 struct acpi_device *ad; 574 575 if ((ad = device_get_ivars(child)) == NULL) { 576 printf("device has no ivars\n"); 577 return (ENOENT); 578 } 579 580 /* ACPI and ISA compatibility ivars */ 581 switch(index) { 582 case ACPI_IVAR_HANDLE: 583 *(ACPI_HANDLE *)result = ad->ad_handle; 584 break; 585 case ACPI_IVAR_MAGIC: 586 *(int *)result = ad->ad_magic; 587 break; 588 case ACPI_IVAR_PRIVATE: 589 *(void **)result = ad->ad_private; 590 break; 591 case ISA_IVAR_VENDORID: 592 case ISA_IVAR_SERIAL: 593 case ISA_IVAR_COMPATID: 594 *(int *)result = -1; 595 break; 596 case ISA_IVAR_LOGICALID: 597 *(int *)result = acpi_isa_get_logicalid(child); 598 break; 599 default: 600 return (ENOENT); 601 } 602 603 return (0); 604 } 605 606 static int 607 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 608 { 609 struct acpi_device *ad; 610 611 if ((ad = device_get_ivars(child)) == NULL) { 612 printf("device has no ivars\n"); 613 return (ENOENT); 614 } 615 616 switch(index) { 617 case ACPI_IVAR_HANDLE: 618 ad->ad_handle = (ACPI_HANDLE)value; 619 break; 620 case ACPI_IVAR_MAGIC: 621 ad->ad_magic = (int)value; 622 break; 623 case ACPI_IVAR_PRIVATE: 624 ad->ad_private = (void *)value; 625 break; 626 default: 627 panic("bad ivar write request (%d)", index); 628 return (ENOENT); 629 } 630 631 return (0); 632 } 633 634 ACPI_HANDLE 635 acpi_get_handle(device_t dev) 636 { 637 uintptr_t up; 638 ACPI_HANDLE h; 639 640 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, &up)) 641 return(NULL); 642 h = (ACPI_HANDLE)up; 643 return (h); 644 } 645 646 int 647 acpi_set_handle(device_t dev, ACPI_HANDLE h) 648 { 649 uintptr_t up; 650 651 up = (uintptr_t)h; 652 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, up)); 653 } 654 655 int 656 acpi_get_magic(device_t dev) 657 { 658 uintptr_t up; 659 int m; 660 661 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, &up)) 662 return(0); 663 m = (int)up; 664 return (m); 665 } 666 667 int 668 acpi_set_magic(device_t dev, int m) 669 { 670 uintptr_t up; 671 672 up = (uintptr_t)m; 673 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, up)); 674 } 675 676 void * 677 acpi_get_private(device_t dev) 678 { 679 uintptr_t up; 680 void *p; 681 682 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, &up)) 683 return (NULL); 684 p = (void *)up; 685 return (p); 686 } 687 688 int 689 acpi_set_private(device_t dev, void *p) 690 { 691 uintptr_t up; 692 693 up = (uintptr_t)p; 694 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, up)); 695 } 696 697 ACPI_OBJECT_TYPE 698 acpi_get_type(device_t dev) 699 { 700 ACPI_HANDLE h; 701 ACPI_OBJECT_TYPE t; 702 703 if ((h = acpi_get_handle(dev)) == NULL) 704 return (ACPI_TYPE_NOT_FOUND); 705 if (AcpiGetType(h, &t) != AE_OK) 706 return (ACPI_TYPE_NOT_FOUND); 707 return (t); 708 } 709 710 /* 711 * Handle child resource allocation/removal 712 */ 713 static int 714 acpi_set_resource(device_t dev, device_t child, int type, int rid, 715 u_long start, u_long count) 716 { 717 struct acpi_device *ad = device_get_ivars(child); 718 struct resource_list *rl = &ad->ad_rl; 719 720 resource_list_add(rl, type, rid, start, start + count -1, count); 721 722 return(0); 723 } 724 725 static int 726 acpi_get_resource(device_t dev, device_t child, int type, int rid, 727 u_long *startp, u_long *countp) 728 { 729 struct acpi_device *ad = device_get_ivars(child); 730 struct resource_list *rl = &ad->ad_rl; 731 struct resource_list_entry *rle; 732 733 rle = resource_list_find(rl, type, rid); 734 if (!rle) 735 return(ENOENT); 736 737 if (startp) 738 *startp = rle->start; 739 if (countp) 740 *countp = rle->count; 741 742 return (0); 743 } 744 745 static struct resource * 746 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 747 u_long start, u_long end, u_long count, u_int flags) 748 { 749 struct acpi_device *ad = device_get_ivars(child); 750 struct resource_list *rl = &ad->ad_rl; 751 752 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 753 flags)); 754 } 755 756 static int 757 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 758 { 759 struct acpi_device *ad = device_get_ivars(child); 760 struct resource_list *rl = &ad->ad_rl; 761 762 return (resource_list_release(rl, bus, child, type, rid, r)); 763 } 764 765 /* Allocate an IO port or memory resource, given its GAS. */ 766 struct resource * 767 acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 768 { 769 int type; 770 771 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 772 gas->RegisterBitWidth < 8) 773 return (NULL); 774 775 switch (gas->AddressSpaceId) { 776 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 777 type = SYS_RES_MEMORY; 778 break; 779 case ACPI_ADR_SPACE_SYSTEM_IO: 780 type = SYS_RES_IOPORT; 781 break; 782 default: 783 return (NULL); 784 } 785 786 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 787 return (bus_alloc_resource(dev, type, rid, 0, ~0, 1, RF_ACTIVE)); 788 } 789 790 /* 791 * Handle ISA-like devices probing for a PnP ID to match. 792 */ 793 #define PNP_EISAID(s) \ 794 ((((s[0] - '@') & 0x1f) << 2) \ 795 | (((s[1] - '@') & 0x18) >> 3) \ 796 | (((s[1] - '@') & 0x07) << 13) \ 797 | (((s[2] - '@') & 0x1f) << 8) \ 798 | (PNP_HEXTONUM(s[4]) << 16) \ 799 | (PNP_HEXTONUM(s[3]) << 20) \ 800 | (PNP_HEXTONUM(s[6]) << 24) \ 801 | (PNP_HEXTONUM(s[5]) << 28)) 802 803 static uint32_t 804 acpi_isa_get_logicalid(device_t dev) 805 { 806 ACPI_DEVICE_INFO *devinfo; 807 ACPI_BUFFER buf; 808 ACPI_HANDLE h; 809 ACPI_STATUS error; 810 u_int32_t pnpid; 811 ACPI_LOCK_DECL; 812 813 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 814 815 pnpid = 0; 816 buf.Pointer = NULL; 817 buf.Length = ACPI_ALLOCATE_BUFFER; 818 819 ACPI_LOCK; 820 821 /* Fetch and validate the HID. */ 822 if ((h = acpi_get_handle(dev)) == NULL) 823 goto out; 824 error = AcpiGetObjectInfo(h, &buf); 825 if (ACPI_FAILURE(error)) 826 goto out; 827 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 828 829 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 830 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 831 832 out: 833 if (buf.Pointer != NULL) 834 AcpiOsFree(buf.Pointer); 835 ACPI_UNLOCK; 836 return_VALUE (pnpid); 837 } 838 839 static int 840 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 841 { 842 ACPI_DEVICE_INFO *devinfo; 843 ACPI_BUFFER buf; 844 ACPI_HANDLE h; 845 ACPI_STATUS error; 846 uint32_t *pnpid; 847 int valid, i; 848 ACPI_LOCK_DECL; 849 850 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 851 852 pnpid = cids; 853 valid = 0; 854 buf.Pointer = NULL; 855 buf.Length = ACPI_ALLOCATE_BUFFER; 856 857 ACPI_LOCK; 858 859 /* Fetch and validate the CID */ 860 if ((h = acpi_get_handle(dev)) == NULL) 861 goto out; 862 error = AcpiGetObjectInfo(h, &buf); 863 if (ACPI_FAILURE(error)) 864 goto out; 865 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 866 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 867 goto out; 868 869 if (devinfo->CompatibilityId.Count < count) 870 count = devinfo->CompatibilityId.Count; 871 for (i = 0; i < count; i++) { 872 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 873 continue; 874 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 875 valid++; 876 } 877 878 out: 879 if (buf.Pointer != NULL) 880 AcpiOsFree(buf.Pointer); 881 ACPI_UNLOCK; 882 return_VALUE (valid); 883 } 884 885 static int 886 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 887 { 888 int result, cid_count, i; 889 uint32_t lid, cids[8]; 890 891 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 892 893 /* 894 * ISA-style drivers attached to ACPI may persist and 895 * probe manually if we return ENOENT. We never want 896 * that to happen, so don't ever return it. 897 */ 898 result = ENXIO; 899 900 /* Scan the supplied IDs for a match */ 901 lid = acpi_isa_get_logicalid(child); 902 cid_count = acpi_isa_get_compatid(child, cids, 8); 903 while (ids && ids->ip_id) { 904 if (lid == ids->ip_id) { 905 result = 0; 906 goto out; 907 } 908 for (i = 0; i < cid_count; i++) { 909 if (cids[i] == ids->ip_id) { 910 result = 0; 911 goto out; 912 } 913 } 914 ids++; 915 } 916 917 out: 918 return_VALUE (result); 919 } 920 921 /* 922 * Scan relevant portions of the ACPI namespace and attach child devices. 923 * 924 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 925 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 926 */ 927 static void 928 acpi_probe_children(device_t bus) 929 { 930 ACPI_HANDLE parent; 931 ACPI_STATUS status; 932 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 933 int i; 934 935 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 936 ACPI_ASSERTLOCK; 937 938 /* Create any static children by calling device identify methods. */ 939 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 940 bus_generic_probe(bus); 941 942 /* 943 * Scan the namespace and insert placeholders for all the devices that 944 * we find. 945 * 946 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 947 * we want to create nodes for all devices, not just those that are 948 * currently present. (This assumes that we don't want to create/remove 949 * devices as they appear, which might be smarter.) 950 */ 951 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 952 for (i = 0; scopes[i] != NULL; i++) { 953 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 954 if (ACPI_SUCCESS(status)) { 955 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 956 bus, NULL); 957 } 958 } 959 960 /* 961 * Scan all of the child devices we have created and let them probe/attach. 962 */ 963 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 964 bus_generic_attach(bus); 965 966 /* 967 * Some of these children may have attached others as part of their attach 968 * process (eg. the root PCI bus driver), so rescan. 969 */ 970 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 971 bus_generic_attach(bus); 972 973 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 974 return_VOID; 975 } 976 977 /* 978 * Evaluate a child device and determine whether we might attach a device to 979 * it. 980 */ 981 static ACPI_STATUS 982 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 983 { 984 ACPI_OBJECT_TYPE type; 985 device_t child, bus = (device_t)context; 986 987 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 988 989 /* Skip this device if we think we'll have trouble with it. */ 990 if (acpi_avoid(handle)) 991 return_ACPI_STATUS (AE_OK); 992 993 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 994 switch(type) { 995 case ACPI_TYPE_DEVICE: 996 case ACPI_TYPE_PROCESSOR: 997 case ACPI_TYPE_THERMAL: 998 case ACPI_TYPE_POWER: 999 if (acpi_disabled("children")) 1000 break; 1001 1002 /* 1003 * Create a placeholder device for this node. Sort the placeholder 1004 * so that the probe/attach passes will run breadth-first. 1005 */ 1006 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1007 acpi_name(handle))); 1008 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 1009 if (child == NULL) 1010 break; 1011 acpi_set_handle(child, handle); 1012 1013 /* 1014 * Check that the device is present. If it's not present, 1015 * leave it disabled (so that we have a device_t attached to 1016 * the handle, but we don't probe it). 1017 */ 1018 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1019 device_disable(child); 1020 break; 1021 } 1022 1023 /* 1024 * Get the device's resource settings and attach them. 1025 * Note that if the device has _PRS but no _CRS, we need 1026 * to decide when it's appropriate to try to configure the 1027 * device. Ignore the return value here; it's OK for the 1028 * device not to have any resources. 1029 */ 1030 acpi_parse_resources(child, handle, &acpi_res_parse_set); 1031 1032 /* If we're debugging, probe/attach now rather than later */ 1033 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 1034 break; 1035 } 1036 } 1037 1038 return_ACPI_STATUS (AE_OK); 1039 } 1040 1041 static void 1042 acpi_shutdown_pre_sync(void *arg, int howto) 1043 { 1044 struct acpi_softc *sc = arg; 1045 1046 ACPI_ASSERTLOCK; 1047 1048 /* 1049 * Disable all ACPI events before soft off, otherwise the system 1050 * will be turned on again on some laptops. 1051 * 1052 * XXX this should probably be restricted to masking some events just 1053 * before powering down, since we may still need ACPI during the 1054 * shutdown process. 1055 */ 1056 if (sc->acpi_disable_on_poweroff) 1057 acpi_Disable(sc); 1058 } 1059 1060 static void 1061 acpi_shutdown_final(void *arg, int howto) 1062 { 1063 ACPI_STATUS status; 1064 1065 ACPI_ASSERTLOCK; 1066 1067 if ((howto & RB_POWEROFF) != 0) { 1068 printf("Powering system off using ACPI\n"); 1069 status = AcpiEnterSleepStatePrep(acpi_off_state); 1070 if (ACPI_FAILURE(status)) { 1071 printf("AcpiEnterSleepStatePrep failed - %s\n", 1072 AcpiFormatException(status)); 1073 return; 1074 } 1075 ACPI_DISABLE_IRQS(); 1076 status = AcpiEnterSleepState(acpi_off_state); 1077 if (ACPI_FAILURE(status)) { 1078 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1079 } else { 1080 DELAY(1000000); 1081 printf("ACPI power-off failed - timeout\n"); 1082 } 1083 } else { 1084 printf("Shutting down ACPI\n"); 1085 AcpiTerminate(); 1086 } 1087 } 1088 1089 static void 1090 acpi_enable_fixed_events(struct acpi_softc *sc) 1091 { 1092 static int first_time = 1; 1093 1094 ACPI_ASSERTLOCK; 1095 1096 /* Enable and clear fixed events and install handlers. */ 1097 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1098 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, 0); 1099 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1100 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1101 acpi_eventhandler_power_button_for_sleep, 1102 sc); 1103 if (first_time) 1104 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1105 } 1106 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1107 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, 0); 1108 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1109 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1110 acpi_eventhandler_sleep_button_for_sleep, 1111 sc); 1112 if (first_time) 1113 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1114 } 1115 1116 first_time = 0; 1117 } 1118 1119 /* 1120 * Returns true if the device is actually present and should 1121 * be attached to. This requires the present, enabled, UI-visible 1122 * and diagnostics-passed bits to be set. 1123 */ 1124 BOOLEAN 1125 acpi_DeviceIsPresent(device_t dev) 1126 { 1127 ACPI_DEVICE_INFO *devinfo; 1128 ACPI_HANDLE h; 1129 ACPI_BUFFER buf; 1130 ACPI_STATUS error; 1131 int ret; 1132 1133 ACPI_ASSERTLOCK; 1134 1135 ret = FALSE; 1136 if ((h = acpi_get_handle(dev)) == NULL) 1137 return (FALSE); 1138 buf.Pointer = NULL; 1139 buf.Length = ACPI_ALLOCATE_BUFFER; 1140 error = AcpiGetObjectInfo(h, &buf); 1141 if (ACPI_FAILURE(error)) 1142 return (FALSE); 1143 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1144 1145 /* If no _STA method, must be present */ 1146 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1147 ret = TRUE; 1148 1149 /* Return true for 'present' and 'functioning' */ 1150 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1151 ret = TRUE; 1152 1153 AcpiOsFree(buf.Pointer); 1154 return (ret); 1155 } 1156 1157 /* 1158 * Returns true if the battery is actually present and inserted. 1159 */ 1160 BOOLEAN 1161 acpi_BatteryIsPresent(device_t dev) 1162 { 1163 ACPI_DEVICE_INFO *devinfo; 1164 ACPI_HANDLE h; 1165 ACPI_BUFFER buf; 1166 ACPI_STATUS error; 1167 int ret; 1168 1169 ACPI_ASSERTLOCK; 1170 1171 ret = FALSE; 1172 if ((h = acpi_get_handle(dev)) == NULL) 1173 return (FALSE); 1174 buf.Pointer = NULL; 1175 buf.Length = ACPI_ALLOCATE_BUFFER; 1176 error = AcpiGetObjectInfo(h, &buf); 1177 if (ACPI_FAILURE(error)) 1178 return (FALSE); 1179 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1180 1181 /* If no _STA method, must be present */ 1182 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1183 ret = TRUE; 1184 1185 /* Return true for 'present' and 'functioning' */ 1186 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1187 ret = TRUE; 1188 1189 AcpiOsFree(buf.Pointer); 1190 return (ret); 1191 } 1192 1193 /* 1194 * Match a HID string against a device 1195 */ 1196 BOOLEAN 1197 acpi_MatchHid(device_t dev, char *hid) 1198 { 1199 ACPI_DEVICE_INFO *devinfo; 1200 ACPI_HANDLE h; 1201 ACPI_BUFFER buf; 1202 ACPI_STATUS error; 1203 int ret, i; 1204 1205 ACPI_ASSERTLOCK; 1206 1207 ret = FALSE; 1208 if (hid == NULL) 1209 return (FALSE); 1210 if ((h = acpi_get_handle(dev)) == NULL) 1211 return (FALSE); 1212 buf.Pointer = NULL; 1213 buf.Length = ACPI_ALLOCATE_BUFFER; 1214 error = AcpiGetObjectInfo(h, &buf); 1215 if (ACPI_FAILURE(error)) 1216 return (FALSE); 1217 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1218 1219 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1220 strcmp(hid, devinfo->HardwareId.Value) == 0) 1221 ret = TRUE; 1222 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1223 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1224 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1225 ret = TRUE; 1226 break; 1227 } 1228 } 1229 } 1230 1231 AcpiOsFree(buf.Pointer); 1232 return (ret); 1233 } 1234 1235 /* 1236 * Return the handle of a named object within our scope, ie. that of (parent) 1237 * or one if its parents. 1238 */ 1239 ACPI_STATUS 1240 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1241 { 1242 ACPI_HANDLE r; 1243 ACPI_STATUS status; 1244 1245 ACPI_ASSERTLOCK; 1246 1247 /* Walk back up the tree to the root */ 1248 for (;;) { 1249 status = AcpiGetHandle(parent, path, &r); 1250 if (ACPI_SUCCESS(status)) { 1251 *result = r; 1252 return (AE_OK); 1253 } 1254 if (status != AE_NOT_FOUND) 1255 return (AE_OK); 1256 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1257 return (AE_NOT_FOUND); 1258 parent = r; 1259 } 1260 } 1261 1262 /* 1263 * Allocate a buffer with a preset data size. 1264 */ 1265 ACPI_BUFFER * 1266 acpi_AllocBuffer(int size) 1267 { 1268 ACPI_BUFFER *buf; 1269 1270 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1271 return (NULL); 1272 buf->Length = size; 1273 buf->Pointer = (void *)(buf + 1); 1274 return (buf); 1275 } 1276 1277 /* 1278 * Evaluate a path that should return an integer. 1279 */ 1280 ACPI_STATUS 1281 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1282 { 1283 ACPI_STATUS status; 1284 ACPI_BUFFER buf; 1285 ACPI_OBJECT param; 1286 1287 ACPI_ASSERTLOCK; 1288 1289 if (handle == NULL) 1290 handle = ACPI_ROOT_OBJECT; 1291 1292 /* 1293 * Assume that what we've been pointed at is an Integer object, or 1294 * a method that will return an Integer. 1295 */ 1296 buf.Pointer = ¶m; 1297 buf.Length = sizeof(param); 1298 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1299 if (ACPI_SUCCESS(status)) { 1300 if (param.Type == ACPI_TYPE_INTEGER) 1301 *number = param.Integer.Value; 1302 else 1303 status = AE_TYPE; 1304 } 1305 1306 /* 1307 * In some applications, a method that's expected to return an Integer 1308 * may instead return a Buffer (probably to simplify some internal 1309 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1310 * convert it into an Integer as best we can. 1311 * 1312 * This is a hack. 1313 */ 1314 if (status == AE_BUFFER_OVERFLOW) { 1315 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1316 status = AE_NO_MEMORY; 1317 } else { 1318 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1319 if (ACPI_SUCCESS(status)) 1320 status = acpi_ConvertBufferToInteger(&buf, number); 1321 AcpiOsFree(buf.Pointer); 1322 } 1323 } 1324 return (status); 1325 } 1326 1327 ACPI_STATUS 1328 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, int *number) 1329 { 1330 ACPI_OBJECT *p; 1331 int i; 1332 1333 p = (ACPI_OBJECT *)bufp->Pointer; 1334 if (p->Type == ACPI_TYPE_INTEGER) { 1335 *number = p->Integer.Value; 1336 return (AE_OK); 1337 } 1338 if (p->Type != ACPI_TYPE_BUFFER) 1339 return (AE_TYPE); 1340 if (p->Buffer.Length > sizeof(int)) 1341 return (AE_BAD_DATA); 1342 1343 *number = 0; 1344 for (i = 0; i < p->Buffer.Length; i++) 1345 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1346 return (AE_OK); 1347 } 1348 1349 /* 1350 * Iterate over the elements of an a package object, calling the supplied 1351 * function for each element. 1352 * 1353 * XXX possible enhancement might be to abort traversal on error. 1354 */ 1355 ACPI_STATUS 1356 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1357 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1358 { 1359 ACPI_OBJECT *comp; 1360 int i; 1361 1362 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1363 return (AE_BAD_PARAMETER); 1364 1365 /* Iterate over components */ 1366 i = 0; 1367 comp = pkg->Package.Elements; 1368 for (; i < pkg->Package.Count; i++, comp++) 1369 func(comp, arg); 1370 1371 return (AE_OK); 1372 } 1373 1374 /* 1375 * Find the (index)th resource object in a set. 1376 */ 1377 ACPI_STATUS 1378 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1379 { 1380 ACPI_RESOURCE *rp; 1381 int i; 1382 1383 rp = (ACPI_RESOURCE *)buf->Pointer; 1384 i = index; 1385 while (i-- > 0) { 1386 /* Range check */ 1387 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1388 return (AE_BAD_PARAMETER); 1389 1390 /* Check for terminator */ 1391 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1392 return (AE_NOT_FOUND); 1393 rp = ACPI_RESOURCE_NEXT(rp); 1394 } 1395 if (resp != NULL) 1396 *resp = rp; 1397 1398 return (AE_OK); 1399 } 1400 1401 /* 1402 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1403 * 1404 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1405 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1406 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1407 * resources. 1408 */ 1409 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1410 1411 ACPI_STATUS 1412 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1413 { 1414 ACPI_RESOURCE *rp; 1415 void *newp; 1416 1417 /* Initialise the buffer if necessary. */ 1418 if (buf->Pointer == NULL) { 1419 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1420 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1421 return (AE_NO_MEMORY); 1422 rp = (ACPI_RESOURCE *)buf->Pointer; 1423 rp->Id = ACPI_RSTYPE_END_TAG; 1424 rp->Length = 0; 1425 } 1426 if (res == NULL) 1427 return (AE_OK); 1428 1429 /* 1430 * Scan the current buffer looking for the terminator. 1431 * This will either find the terminator or hit the end 1432 * of the buffer and return an error. 1433 */ 1434 rp = (ACPI_RESOURCE *)buf->Pointer; 1435 for (;;) { 1436 /* Range check, don't go outside the buffer */ 1437 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1438 return (AE_BAD_PARAMETER); 1439 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1440 break; 1441 rp = ACPI_RESOURCE_NEXT(rp); 1442 } 1443 1444 /* 1445 * Check the size of the buffer and expand if required. 1446 * 1447 * Required size is: 1448 * size of existing resources before terminator + 1449 * size of new resource and header + 1450 * size of terminator. 1451 * 1452 * Note that this loop should really only run once, unless 1453 * for some reason we are stuffing a *really* huge resource. 1454 */ 1455 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1456 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1457 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1458 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1459 return (AE_NO_MEMORY); 1460 bcopy(buf->Pointer, newp, buf->Length); 1461 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1462 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1463 AcpiOsFree(buf->Pointer); 1464 buf->Pointer = newp; 1465 buf->Length += buf->Length; 1466 } 1467 1468 /* Insert the new resource. */ 1469 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1470 1471 /* And add the terminator. */ 1472 rp = ACPI_RESOURCE_NEXT(rp); 1473 rp->Id = ACPI_RSTYPE_END_TAG; 1474 rp->Length = 0; 1475 1476 return (AE_OK); 1477 } 1478 1479 /* 1480 * Set interrupt model. 1481 */ 1482 ACPI_STATUS 1483 acpi_SetIntrModel(int model) 1484 { 1485 ACPI_OBJECT_LIST ArgList; 1486 ACPI_OBJECT Arg; 1487 1488 Arg.Type = ACPI_TYPE_INTEGER; 1489 Arg.Integer.Value = model; 1490 ArgList.Count = 1; 1491 ArgList.Pointer = &Arg; 1492 return (AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &ArgList, NULL)); 1493 } 1494 1495 #define ACPI_MINIMUM_AWAKETIME 5 1496 1497 static void 1498 acpi_sleep_enable(void *arg) 1499 { 1500 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1501 } 1502 1503 /* 1504 * Set the system sleep state 1505 * 1506 * Currently we support S1-S5 but S4 is only S4BIOS 1507 */ 1508 ACPI_STATUS 1509 acpi_SetSleepState(struct acpi_softc *sc, int state) 1510 { 1511 ACPI_STATUS status = AE_OK; 1512 UINT8 TypeA; 1513 UINT8 TypeB; 1514 1515 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1516 ACPI_ASSERTLOCK; 1517 1518 /* Avoid reentry if already attempting to suspend. */ 1519 if (sc->acpi_sstate != ACPI_STATE_S0) 1520 return_ACPI_STATUS (AE_BAD_PARAMETER); 1521 1522 /* We recently woke up so don't suspend again for a while. */ 1523 if (sc->acpi_sleep_disabled) 1524 return_ACPI_STATUS (AE_OK); 1525 1526 switch (state) { 1527 case ACPI_STATE_S1: 1528 case ACPI_STATE_S2: 1529 case ACPI_STATE_S3: 1530 case ACPI_STATE_S4: 1531 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1532 if (status == AE_NOT_FOUND) { 1533 device_printf(sc->acpi_dev, 1534 "Sleep state S%d not supported by BIOS\n", state); 1535 break; 1536 } else if (ACPI_FAILURE(status)) { 1537 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1538 AcpiFormatException(status)); 1539 break; 1540 } 1541 1542 sc->acpi_sstate = state; 1543 sc->acpi_sleep_disabled = 1; 1544 1545 /* Inform all devices that we are going to sleep. */ 1546 if (DEVICE_SUSPEND(root_bus) != 0) { 1547 /* 1548 * Re-wake the system. 1549 * 1550 * XXX note that a better two-pass approach with a 'veto' pass 1551 * followed by a "real thing" pass would be better, but the 1552 * current bus interface does not provide for this. 1553 */ 1554 DEVICE_RESUME(root_bus); 1555 return_ACPI_STATUS (AE_ERROR); 1556 } 1557 1558 status = AcpiEnterSleepStatePrep(state); 1559 if (ACPI_FAILURE(status)) { 1560 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1561 AcpiFormatException(status)); 1562 break; 1563 } 1564 1565 if (sc->acpi_sleep_delay > 0) 1566 DELAY(sc->acpi_sleep_delay * 1000000); 1567 1568 if (state != ACPI_STATE_S1) { 1569 acpi_sleep_machdep(sc, state); 1570 1571 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1572 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1573 ACPI_MUTEX_NOT_ACQUIRED) { 1574 1575 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1576 } 1577 1578 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1579 if (state == ACPI_STATE_S4) 1580 AcpiEnable(); 1581 } else { 1582 status = AcpiEnterSleepState((UINT8)state); 1583 if (ACPI_FAILURE(status)) { 1584 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1585 AcpiFormatException(status)); 1586 break; 1587 } 1588 } 1589 AcpiLeaveSleepState((UINT8)state); 1590 DEVICE_RESUME(root_bus); 1591 sc->acpi_sstate = ACPI_STATE_S0; 1592 acpi_enable_fixed_events(sc); 1593 break; 1594 case ACPI_STATE_S5: 1595 /* 1596 * Shut down cleanly and power off. This will call us back through the 1597 * shutdown handlers. 1598 */ 1599 shutdown_nice(RB_POWEROFF); 1600 break; 1601 case ACPI_STATE_S0: 1602 default: 1603 status = AE_BAD_PARAMETER; 1604 break; 1605 } 1606 1607 /* Disable a second sleep request for a short period */ 1608 if (sc->acpi_sleep_disabled) 1609 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1610 1611 return_ACPI_STATUS (status); 1612 } 1613 1614 /* 1615 * Enable/Disable ACPI 1616 */ 1617 ACPI_STATUS 1618 acpi_Enable(struct acpi_softc *sc) 1619 { 1620 ACPI_STATUS status; 1621 u_int32_t flags; 1622 1623 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1624 ACPI_ASSERTLOCK; 1625 1626 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1627 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1628 if (!sc->acpi_enabled) 1629 status = AcpiEnableSubsystem(flags); 1630 else 1631 status = AE_OK; 1632 1633 if (status == AE_OK) 1634 sc->acpi_enabled = 1; 1635 1636 return_ACPI_STATUS (status); 1637 } 1638 1639 ACPI_STATUS 1640 acpi_Disable(struct acpi_softc *sc) 1641 { 1642 ACPI_STATUS status; 1643 1644 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1645 ACPI_ASSERTLOCK; 1646 1647 if (sc->acpi_enabled) 1648 status = AcpiDisable(); 1649 else 1650 status = AE_OK; 1651 1652 if (status == AE_OK) 1653 sc->acpi_enabled = 0; 1654 1655 return_ACPI_STATUS (status); 1656 } 1657 1658 /* 1659 * ACPI Event Handlers 1660 */ 1661 1662 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1663 1664 static void 1665 acpi_system_eventhandler_sleep(void *arg, int state) 1666 { 1667 ACPI_LOCK_DECL; 1668 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1669 1670 ACPI_LOCK; 1671 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1672 acpi_SetSleepState((struct acpi_softc *)arg, state); 1673 ACPI_UNLOCK; 1674 return_VOID; 1675 } 1676 1677 static void 1678 acpi_system_eventhandler_wakeup(void *arg, int state) 1679 { 1680 ACPI_LOCK_DECL; 1681 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1682 1683 /* Well, what to do? :-) */ 1684 1685 ACPI_LOCK; 1686 ACPI_UNLOCK; 1687 1688 return_VOID; 1689 } 1690 1691 /* 1692 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1693 */ 1694 UINT32 1695 acpi_eventhandler_power_button_for_sleep(void *context) 1696 { 1697 struct acpi_softc *sc = (struct acpi_softc *)context; 1698 1699 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1700 1701 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1702 1703 return_VALUE (ACPI_INTERRUPT_HANDLED); 1704 } 1705 1706 UINT32 1707 acpi_eventhandler_power_button_for_wakeup(void *context) 1708 { 1709 struct acpi_softc *sc = (struct acpi_softc *)context; 1710 1711 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1712 1713 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1714 1715 return_VALUE (ACPI_INTERRUPT_HANDLED); 1716 } 1717 1718 UINT32 1719 acpi_eventhandler_sleep_button_for_sleep(void *context) 1720 { 1721 struct acpi_softc *sc = (struct acpi_softc *)context; 1722 1723 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1724 1725 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1726 1727 return_VALUE (ACPI_INTERRUPT_HANDLED); 1728 } 1729 1730 UINT32 1731 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1732 { 1733 struct acpi_softc *sc = (struct acpi_softc *)context; 1734 1735 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1736 1737 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1738 1739 return_VALUE (ACPI_INTERRUPT_HANDLED); 1740 } 1741 1742 /* 1743 * XXX This is kinda ugly, and should not be here. 1744 */ 1745 struct acpi_staticbuf { 1746 ACPI_BUFFER buffer; 1747 char data[512]; 1748 }; 1749 1750 char * 1751 acpi_name(ACPI_HANDLE handle) 1752 { 1753 static struct acpi_staticbuf buf; 1754 1755 ACPI_ASSERTLOCK; 1756 1757 buf.buffer.Length = 512; 1758 buf.buffer.Pointer = &buf.data[0]; 1759 1760 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1761 return (buf.buffer.Pointer); 1762 1763 return ("(unknown path)"); 1764 } 1765 1766 /* 1767 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1768 * parts of the namespace. 1769 */ 1770 int 1771 acpi_avoid(ACPI_HANDLE handle) 1772 { 1773 char *cp, *env, *np; 1774 int len; 1775 1776 np = acpi_name(handle); 1777 if (*np == '\\') 1778 np++; 1779 if ((env = getenv("debug.acpi.avoid")) == NULL) 1780 return (0); 1781 1782 /* Scan the avoid list checking for a match */ 1783 cp = env; 1784 for (;;) { 1785 while ((*cp != 0) && isspace(*cp)) 1786 cp++; 1787 if (*cp == 0) 1788 break; 1789 len = 0; 1790 while ((cp[len] != 0) && !isspace(cp[len])) 1791 len++; 1792 if (!strncmp(cp, np, len)) { 1793 freeenv(env); 1794 return(1); 1795 } 1796 cp += len; 1797 } 1798 freeenv(env); 1799 1800 return (0); 1801 } 1802 1803 /* 1804 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1805 */ 1806 int 1807 acpi_disabled(char *subsys) 1808 { 1809 char *cp, *env; 1810 int len; 1811 1812 if ((env = getenv("debug.acpi.disable")) == NULL) 1813 return (0); 1814 if (!strcmp(env, "all")) { 1815 freeenv(env); 1816 return (1); 1817 } 1818 1819 /* scan the disable list checking for a match */ 1820 cp = env; 1821 for (;;) { 1822 while ((*cp != 0) && isspace(*cp)) 1823 cp++; 1824 if (*cp == 0) 1825 break; 1826 len = 0; 1827 while ((cp[len] != 0) && !isspace(cp[len])) 1828 len++; 1829 if (!strncmp(cp, subsys, len)) { 1830 freeenv(env); 1831 return (1); 1832 } 1833 cp += len; 1834 } 1835 freeenv(env); 1836 1837 return (0); 1838 } 1839 1840 /* 1841 * Device wake capability enable/disable. 1842 */ 1843 void 1844 acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1845 { 1846 ACPI_OBJECT_LIST ArgList; 1847 ACPI_OBJECT Arg; 1848 1849 /* 1850 * TBD: All Power Resources referenced by elements 2 through N 1851 * of the _PRW object are put into the ON state. 1852 */ 1853 1854 ArgList.Count = 1; 1855 ArgList.Pointer = &Arg; 1856 1857 Arg.Type = ACPI_TYPE_INTEGER; 1858 Arg.Integer.Value = enable; 1859 1860 (void)AcpiEvaluateObject(h, "_PSW", &ArgList, NULL); 1861 } 1862 1863 void 1864 acpi_device_enable_wake_event(ACPI_HANDLE h) 1865 { 1866 struct acpi_softc *sc; 1867 ACPI_STATUS status; 1868 ACPI_BUFFER prw_buffer; 1869 ACPI_OBJECT *res; 1870 1871 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1872 1873 sc = devclass_get_softc(acpi_devclass, 0); 1874 if (sc == NULL) 1875 return; 1876 1877 /* 1878 * _PRW object is only required for devices that have the ability 1879 * to wake the system from a system sleeping state. 1880 */ 1881 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1882 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1883 if (ACPI_FAILURE(status)) 1884 return; 1885 1886 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1887 if (res == NULL) 1888 return; 1889 1890 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1891 goto out; 1892 } 1893 1894 /* 1895 * The element 1 of the _PRW object: 1896 * The lowest power system sleeping state that can be entered 1897 * while still providing wake functionality. 1898 * The sleeping state being entered must be greater or equal to 1899 * the power state declared in element 1 of the _PRW object. 1900 */ 1901 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) 1902 goto out; 1903 1904 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) 1905 goto out; 1906 1907 /* 1908 * The element 0 of the _PRW object: 1909 */ 1910 switch(res->Package.Elements[0].Type) { 1911 case ACPI_TYPE_INTEGER: 1912 /* 1913 * If the data type of this package element is numeric, then this 1914 * _PRW package element is the bit index in the GPEx_EN, in the 1915 * GPE blocks described in the FADT, of the enable bit that is 1916 * enabled for the wake event. 1917 */ 1918 1919 status = AcpiEnableGpe(NULL, res->Package.Elements[0].Integer.Value, 1920 ACPI_EVENT_WAKE_ENABLE); 1921 if (ACPI_FAILURE(status)) 1922 printf("%s: EnableEvent Failed\n", __func__); 1923 break; 1924 case ACPI_TYPE_PACKAGE: 1925 /* 1926 * XXX TBD 1927 * 1928 * If the data type of this package element is a package, then this 1929 * _PRW package element is itself a package containing two 1930 * elements. The first is an object reference to the GPE Block 1931 * device that contains the GPE that will be triggered by the wake 1932 * event. The second element is numeric and it contains the bit 1933 * index in the GPEx_EN, in the GPE Block referenced by the 1934 * first element in the package, of the enable bit that is enabled for 1935 * the wake event. 1936 * For example, if this field is a package then it is of the form: 1937 * Package() {\_SB.PCI0.ISA.GPE, 2} 1938 */ 1939 break; 1940 default: 1941 break; 1942 } 1943 1944 out: 1945 if (prw_buffer.Pointer != NULL) 1946 AcpiOsFree(prw_buffer.Pointer); 1947 } 1948 1949 /* 1950 * Control interface. 1951 * 1952 * We multiplex ioctls for all participating ACPI devices here. Individual 1953 * drivers wanting to be accessible via /dev/acpi should use the 1954 * register/deregister interface to make their handlers visible. 1955 */ 1956 struct acpi_ioctl_hook 1957 { 1958 TAILQ_ENTRY(acpi_ioctl_hook) link; 1959 u_long cmd; 1960 acpi_ioctl_fn fn; 1961 void *arg; 1962 }; 1963 1964 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1965 static int acpi_ioctl_hooks_initted; 1966 1967 /* 1968 * Register an ioctl handler. 1969 */ 1970 int 1971 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 1972 { 1973 struct acpi_ioctl_hook *hp; 1974 1975 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1976 return (ENOMEM); 1977 hp->cmd = cmd; 1978 hp->fn = fn; 1979 hp->arg = arg; 1980 if (acpi_ioctl_hooks_initted == 0) { 1981 TAILQ_INIT(&acpi_ioctl_hooks); 1982 acpi_ioctl_hooks_initted = 1; 1983 } 1984 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1985 return (0); 1986 } 1987 1988 /* 1989 * Deregister an ioctl handler. 1990 */ 1991 void 1992 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 1993 { 1994 struct acpi_ioctl_hook *hp; 1995 1996 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1997 if ((hp->cmd == cmd) && (hp->fn == fn)) 1998 break; 1999 2000 if (hp != NULL) { 2001 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2002 free(hp, M_ACPIDEV); 2003 } 2004 } 2005 2006 static int 2007 acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2008 { 2009 return (0); 2010 } 2011 2012 static int 2013 acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2014 { 2015 return (0); 2016 } 2017 2018 static int 2019 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2020 { 2021 struct acpi_softc *sc; 2022 struct acpi_ioctl_hook *hp; 2023 int error, xerror, state; 2024 ACPI_LOCK_DECL; 2025 2026 ACPI_LOCK; 2027 2028 error = state = 0; 2029 sc = dev->si_drv1; 2030 2031 /* 2032 * Scan the list of registered ioctls, looking for handlers. 2033 */ 2034 if (acpi_ioctl_hooks_initted) { 2035 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2036 if (hp->cmd == cmd) { 2037 xerror = hp->fn(cmd, addr, hp->arg); 2038 if (xerror != 0) 2039 error = xerror; 2040 goto out; 2041 } 2042 } 2043 } 2044 2045 /* 2046 * Core ioctls are not permitted for non-writable user. 2047 * Currently, other ioctls just fetch information. 2048 * Not changing system behavior. 2049 */ 2050 if((flag & FWRITE) == 0) 2051 return (EPERM); 2052 2053 /* Core system ioctls. */ 2054 switch (cmd) { 2055 case ACPIIO_ENABLE: 2056 if (ACPI_FAILURE(acpi_Enable(sc))) 2057 error = ENXIO; 2058 break; 2059 case ACPIIO_DISABLE: 2060 if (ACPI_FAILURE(acpi_Disable(sc))) 2061 error = ENXIO; 2062 break; 2063 case ACPIIO_SETSLPSTATE: 2064 if (!sc->acpi_enabled) { 2065 error = ENXIO; 2066 break; 2067 } 2068 state = *(int *)addr; 2069 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2070 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2071 error = EINVAL; 2072 } else { 2073 error = EINVAL; 2074 } 2075 break; 2076 default: 2077 if (error == 0) 2078 error = EINVAL; 2079 break; 2080 } 2081 2082 out: 2083 ACPI_UNLOCK; 2084 return (error); 2085 } 2086 2087 static int 2088 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2089 { 2090 char sleep_state[4]; 2091 char buf[16]; 2092 int error; 2093 UINT8 state, TypeA, TypeB; 2094 2095 buf[0] = '\0'; 2096 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 2097 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2098 sprintf(sleep_state, "S%d ", state); 2099 strcat(buf, sleep_state); 2100 } 2101 } 2102 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2103 return (error); 2104 } 2105 2106 static int 2107 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2108 { 2109 char sleep_state[10]; 2110 int error; 2111 u_int new_state, old_state; 2112 2113 old_state = *(u_int *)oidp->oid_arg1; 2114 if (old_state > ACPI_S_STATES_MAX+1) { 2115 strcpy(sleep_state, "unknown"); 2116 } else { 2117 bzero(sleep_state, sizeof(sleep_state)); 2118 strncpy(sleep_state, sleep_state_names[old_state], 2119 sizeof(sleep_state_names[old_state])); 2120 } 2121 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2122 if (error == 0 && req->newptr != NULL) { 2123 new_state = ACPI_STATE_S0; 2124 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2125 if (strncmp(sleep_state, sleep_state_names[new_state], 2126 sizeof(sleep_state)) == 0) 2127 break; 2128 } 2129 if (new_state <= ACPI_S_STATES_MAX + 1) { 2130 if (new_state != old_state) 2131 *(u_int *)oidp->oid_arg1 = new_state; 2132 } else { 2133 error = EINVAL; 2134 } 2135 } 2136 2137 return (error); 2138 } 2139 2140 /* Inform devctl(4) when we receive a Notify. */ 2141 void 2142 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2143 { 2144 char notify_buf[16]; 2145 ACPI_BUFFER handle_buf; 2146 ACPI_STATUS status; 2147 2148 if (subsystem == NULL) 2149 return; 2150 2151 handle_buf.Pointer = NULL; 2152 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2153 status = AcpiNsHandleToPathname(h, &handle_buf); 2154 if (ACPI_FAILURE(status)) 2155 return; 2156 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2157 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2158 AcpiOsFree(handle_buf.Pointer); 2159 } 2160 2161 #ifdef ACPI_DEBUG 2162 /* 2163 * Support for parsing debug options from the kernel environment. 2164 * 2165 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2166 * by specifying the names of the bits in the debug.acpi.layer and 2167 * debug.acpi.level environment variables. Bits may be unset by 2168 * prefixing the bit name with !. 2169 */ 2170 struct debugtag 2171 { 2172 char *name; 2173 UINT32 value; 2174 }; 2175 2176 static struct debugtag dbg_layer[] = { 2177 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2178 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2179 {"ACPI_EVENTS", ACPI_EVENTS}, 2180 {"ACPI_TABLES", ACPI_TABLES}, 2181 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2182 {"ACPI_PARSER", ACPI_PARSER}, 2183 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2184 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2185 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2186 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2187 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2188 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2189 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2190 2191 {"ACPI_BUS", ACPI_BUS}, 2192 {"ACPI_SYSTEM", ACPI_SYSTEM}, 2193 {"ACPI_POWER", ACPI_POWER}, 2194 {"ACPI_EC", ACPI_EC}, 2195 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2196 {"ACPI_BATTERY", ACPI_BATTERY}, 2197 {"ACPI_BUTTON", ACPI_BUTTON}, 2198 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2199 {"ACPI_THERMAL", ACPI_THERMAL}, 2200 {"ACPI_FAN", ACPI_FAN}, 2201 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2202 {NULL, 0} 2203 }; 2204 2205 static struct debugtag dbg_level[] = { 2206 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2207 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2208 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2209 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2210 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2211 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2212 2213 /* Trace verbosity level 1 [Standard Trace Level] */ 2214 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2215 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2216 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2217 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2218 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2219 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2220 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2221 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2222 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2223 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2224 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2225 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2226 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2227 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2228 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2229 2230 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2231 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2232 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2233 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2234 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2235 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2236 2237 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2238 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2239 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2240 {"ACPI_LV_IO", ACPI_LV_IO}, 2241 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2242 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2243 2244 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2245 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2246 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2247 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2248 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2249 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2250 {NULL, 0} 2251 }; 2252 2253 static void 2254 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2255 { 2256 char *ep; 2257 int i, l; 2258 int set; 2259 2260 while (*cp) { 2261 if (isspace(*cp)) { 2262 cp++; 2263 continue; 2264 } 2265 ep = cp; 2266 while (*ep && !isspace(*ep)) 2267 ep++; 2268 if (*cp == '!') { 2269 set = 0; 2270 cp++; 2271 if (cp == ep) 2272 continue; 2273 } else { 2274 set = 1; 2275 } 2276 l = ep - cp; 2277 for (i = 0; tag[i].name != NULL; i++) { 2278 if (!strncmp(cp, tag[i].name, l)) { 2279 if (set) 2280 *flag |= tag[i].value; 2281 else 2282 *flag &= ~tag[i].value; 2283 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2284 } 2285 } 2286 cp = ep; 2287 } 2288 } 2289 2290 static void 2291 acpi_set_debugging(void *junk) 2292 { 2293 char *cp; 2294 2295 if (cold) { 2296 AcpiDbgLayer = 0; 2297 AcpiDbgLevel = 0; 2298 } 2299 2300 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2301 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2302 freeenv(cp); 2303 } 2304 if ((cp = getenv("debug.acpi.level")) != NULL) { 2305 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2306 freeenv(cp); 2307 } 2308 2309 if (cold) { 2310 printf("ACPI debug layer 0x%x debug level 0x%x\n", 2311 AcpiDbgLayer, AcpiDbgLevel); 2312 } 2313 } 2314 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2315 NULL); 2316 2317 static int 2318 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2319 { 2320 int error, *dbg; 2321 struct debugtag *tag; 2322 struct sbuf sb; 2323 2324 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2325 return (ENOMEM); 2326 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2327 tag = &dbg_layer[0]; 2328 dbg = &AcpiDbgLayer; 2329 } else { 2330 tag = &dbg_level[0]; 2331 dbg = &AcpiDbgLevel; 2332 } 2333 2334 /* Get old values if this is a get request. */ 2335 if (*dbg == 0) { 2336 sbuf_cpy(&sb, "NONE"); 2337 } else if (req->newptr == NULL) { 2338 for (; tag->name != NULL; tag++) { 2339 if ((*dbg & tag->value) == tag->value) 2340 sbuf_printf(&sb, "%s ", tag->name); 2341 } 2342 } 2343 sbuf_trim(&sb); 2344 sbuf_finish(&sb); 2345 2346 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2347 sbuf_delete(&sb); 2348 2349 /* If the user is setting a string, parse it. */ 2350 if (error == 0 && req->newptr != NULL) { 2351 *dbg = 0; 2352 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2353 acpi_set_debugging(NULL); 2354 } 2355 2356 return (error); 2357 } 2358 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2359 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2360 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2361 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2362 #endif 2363 2364 static int 2365 acpi_pm_func(u_long cmd, void *arg, ...) 2366 { 2367 int state, acpi_state; 2368 int error; 2369 struct acpi_softc *sc; 2370 va_list ap; 2371 2372 error = 0; 2373 switch (cmd) { 2374 case POWER_CMD_SUSPEND: 2375 sc = (struct acpi_softc *)arg; 2376 if (sc == NULL) { 2377 error = EINVAL; 2378 goto out; 2379 } 2380 2381 va_start(ap, arg); 2382 state = va_arg(ap, int); 2383 va_end(ap); 2384 2385 switch (state) { 2386 case POWER_SLEEP_STATE_STANDBY: 2387 acpi_state = sc->acpi_standby_sx; 2388 break; 2389 case POWER_SLEEP_STATE_SUSPEND: 2390 acpi_state = sc->acpi_suspend_sx; 2391 break; 2392 case POWER_SLEEP_STATE_HIBERNATE: 2393 acpi_state = ACPI_STATE_S4; 2394 break; 2395 default: 2396 error = EINVAL; 2397 goto out; 2398 } 2399 2400 acpi_SetSleepState(sc, acpi_state); 2401 break; 2402 default: 2403 error = EINVAL; 2404 goto out; 2405 } 2406 2407 out: 2408 return (error); 2409 } 2410 2411 static void 2412 acpi_pm_register(void *arg) 2413 { 2414 if (!cold || resource_disabled("acpi", 0)) 2415 return; 2416 2417 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2418 } 2419 2420 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2421