acpi.c revision 126767
1178173Simp/*- 2178173Simp * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3178173Simp * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4178173Simp * Copyright (c) 2000, 2001 Michael Smith 5178173Simp * Copyright (c) 2000 BSDi 6178173Simp * All rights reserved. 7178173Simp * 8178173Simp * Redistribution and use in source and binary forms, with or without 9178173Simp * modification, are permitted provided that the following conditions 10178173Simp * are met: 11178173Simp * 1. Redistributions of source code must retain the above copyright 12178173Simp * notice, this list of conditions and the following disclaimer. 13178173Simp * 2. Redistributions in binary form must reproduce the above copyright 14178173Simp * notice, this list of conditions and the following disclaimer in the 15178173Simp * documentation and/or other materials provided with the distribution. 16178173Simp * 17178173Simp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18178173Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19178173Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20178173Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21178173Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22178173Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23178173Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24178173Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25178173Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26178173Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27178173Simp * SUCH DAMAGE. 28178173Simp * 29178173Simp * $FreeBSD: head/sys/dev/acpica/acpi.c 126767 2004-03-09 05:44:47Z njl $ 30178173Simp */ 31178173Simp 32178173Simp#include "opt_acpi.h" 33178173Simp#include <sys/param.h> 34178173Simp#include <sys/kernel.h> 35178173Simp#include <sys/proc.h> 36178173Simp#include <sys/fcntl.h> 37178173Simp#include <sys/malloc.h> 38178173Simp#include <sys/bus.h> 39178173Simp#include <sys/conf.h> 40178173Simp#include <sys/ioccom.h> 41178173Simp#include <sys/reboot.h> 42178173Simp#include <sys/sysctl.h> 43178173Simp#include <sys/ctype.h> 44178173Simp#include <sys/linker.h> 45178173Simp#include <sys/power.h> 46178173Simp#include <sys/sbuf.h> 47178173Simp 48178173Simp#include <machine/clock.h> 49178173Simp#include <machine/resource.h> 50178173Simp#include <machine/bus.h> 51178173Simp#include <sys/rman.h> 52178173Simp#include <isa/isavar.h> 53178173Simp 54178173Simp#include "acpi.h" 55178173Simp#include <dev/acpica/acpivar.h> 56178173Simp#include <dev/acpica/acpiio.h> 57178173Simp#include <contrib/dev/acpica/acnamesp.h> 58178173Simp 59MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 60 61/* Hooks for the ACPI CA debugging infrastructure */ 62#define _COMPONENT ACPI_BUS 63ACPI_MODULE_NAME("ACPI") 64 65static d_open_t acpiopen; 66static d_close_t acpiclose; 67static d_ioctl_t acpiioctl; 68 69static struct cdevsw acpi_cdevsw = { 70 .d_version = D_VERSION, 71 .d_flags = D_NEEDGIANT, 72 .d_open = acpiopen, 73 .d_close = acpiclose, 74 .d_ioctl = acpiioctl, 75 .d_name = "acpi", 76}; 77 78static 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 */ 82static int acpi_off_state = ACPI_STATE_S5; 83 84#if __FreeBSD_version >= 500000 85struct mtx acpi_mutex; 86#endif 87 88struct acpi_quirks { 89 char *OemId; 90 uint32_t OemRevision; 91 char *value; 92}; 93 94#define ACPI_OEM_REV_ANY 0 95 96static struct acpi_quirks acpi_quirks_table[] = { 97#ifdef notyet 98 /* Bad PCI routing table. Used on some SuperMicro boards. */ 99 { "PTLTD ", 0x06040000, "pci_link" }, 100#endif 101 102 { NULL, 0, NULL } 103}; 104 105static int acpi_modevent(struct module *mod, int event, void *junk); 106static void acpi_identify(driver_t *driver, device_t parent); 107static int acpi_probe(device_t dev); 108static int acpi_attach(device_t dev); 109static void acpi_quirks_set(void); 110static device_t acpi_add_child(device_t bus, int order, const char *name, 111 int unit); 112static int acpi_print_child(device_t bus, device_t child); 113static int acpi_read_ivar(device_t dev, device_t child, int index, 114 uintptr_t *result); 115static int acpi_write_ivar(device_t dev, device_t child, int index, 116 uintptr_t value); 117static int acpi_set_resource(device_t dev, device_t child, int type, 118 int rid, u_long start, u_long count); 119static int acpi_get_resource(device_t dev, device_t child, int type, 120 int rid, u_long *startp, u_long *countp); 121static struct resource *acpi_alloc_resource(device_t bus, device_t child, 122 int type, int *rid, u_long start, u_long end, 123 u_long count, u_int flags); 124static int acpi_release_resource(device_t bus, device_t child, int type, 125 int rid, struct resource *r); 126static uint32_t acpi_isa_get_logicalid(device_t dev); 127static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 128static int acpi_isa_pnp_probe(device_t bus, device_t child, 129 struct isa_pnp_id *ids); 130static void acpi_probe_children(device_t bus); 131static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 132 void *context, void **status); 133static void acpi_shutdown_pre_sync(void *arg, int howto); 134static void acpi_shutdown_final(void *arg, int howto); 135static void acpi_enable_fixed_events(struct acpi_softc *sc); 136static void acpi_system_eventhandler_sleep(void *arg, int state); 137static void acpi_system_eventhandler_wakeup(void *arg, int state); 138static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 139static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 140static int acpi_pm_func(u_long cmd, void *arg, ...); 141 142static device_method_t acpi_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_identify, acpi_identify), 145 DEVMETHOD(device_probe, acpi_probe), 146 DEVMETHOD(device_attach, acpi_attach), 147 DEVMETHOD(device_detach, bus_generic_detach), 148 DEVMETHOD(device_shutdown, bus_generic_shutdown), 149 DEVMETHOD(device_suspend, bus_generic_suspend), 150 DEVMETHOD(device_resume, bus_generic_resume), 151 152 /* Bus interface */ 153 DEVMETHOD(bus_add_child, acpi_add_child), 154 DEVMETHOD(bus_print_child, acpi_print_child), 155 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 156 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 157 DEVMETHOD(bus_set_resource, acpi_set_resource), 158 DEVMETHOD(bus_get_resource, acpi_get_resource), 159 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 160 DEVMETHOD(bus_release_resource, acpi_release_resource), 161 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 162 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 163 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 164 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 165 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 166 167 /* ISA emulation */ 168 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 169 170 {0, 0} 171}; 172 173static driver_t acpi_driver = { 174 "acpi", 175 acpi_methods, 176 sizeof(struct acpi_softc), 177}; 178 179static devclass_t acpi_devclass; 180DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 181MODULE_VERSION(acpi, 100); 182 183SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 184static char acpi_ca_version[12]; 185SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 186 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 187 188/* 189 * ACPI can only be loaded as a module by the loader; activating it after 190 * system bootstrap time is not useful, and can be fatal to the system. 191 * It also cannot be unloaded, since the entire system bus heirarchy hangs 192 * off it. 193 */ 194static int 195acpi_modevent(struct module *mod, int event, void *junk) 196{ 197 switch(event) { 198 case MOD_LOAD: 199 if (!cold) { 200 printf("The ACPI driver cannot be loaded after boot.\n"); 201 return (EPERM); 202 } 203 break; 204 case MOD_UNLOAD: 205 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 206 return (EBUSY); 207 break; 208 default: 209 break; 210 } 211 return (0); 212} 213 214/* 215 * Perform early initialization. 216 */ 217ACPI_STATUS 218acpi_Startup(void) 219{ 220#ifdef ACPI_DEBUGGER 221 char *debugpoint; 222#endif 223 static int error, started = 0; 224 225 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 226 227 if (started) 228 return_VALUE (error); 229 started = 1; 230 231#if __FreeBSD_version >= 500000 232 /* Initialise the ACPI mutex */ 233 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 234#endif 235 236 /* Start up the ACPI CA subsystem. */ 237#ifdef ACPI_DEBUGGER 238 debugpoint = getenv("debug.acpi.debugger"); 239 if (debugpoint) { 240 if (!strcmp(debugpoint, "init")) 241 acpi_EnterDebugger(); 242 freeenv(debugpoint); 243 } 244#endif 245 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 246 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 247 return_VALUE (error); 248 } 249#ifdef ACPI_DEBUGGER 250 debugpoint = getenv("debug.acpi.debugger"); 251 if (debugpoint) { 252 if (!strcmp(debugpoint, "tables")) 253 acpi_EnterDebugger(); 254 freeenv(debugpoint); 255 } 256#endif 257 258 if (ACPI_FAILURE(error = AcpiLoadTables())) { 259 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 260 return_VALUE(error); 261 } 262 263 /* Set up any quirks we have for this XSDT. */ 264 acpi_quirks_set(); 265 if (acpi_disabled("acpi")) 266 return_VALUE (AE_ERROR); 267 268 return_VALUE (AE_OK); 269} 270 271/* 272 * Detect ACPI, perform early initialisation 273 */ 274static void 275acpi_identify(driver_t *driver, device_t parent) 276{ 277 device_t child; 278 279 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 280 281 if (!cold) 282 return_VOID; 283 284 /* Check that we haven't been disabled with a hint. */ 285 if (resource_disabled("acpi", 0)) 286 return_VOID; 287 288 /* Make sure we're not being doubly invoked. */ 289 if (device_find_child(parent, "acpi", 0) != NULL) 290 return_VOID; 291 292 /* Initialize ACPI-CA. */ 293 if (ACPI_FAILURE(acpi_Startup())) 294 return_VOID; 295 296 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 297 298 /* Attach the actual ACPI device. */ 299 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 300 device_printf(parent, "ACPI: could not attach\n"); 301 return_VOID; 302 } 303} 304 305/* 306 * Fetch some descriptive data from ACPI to put in our attach message 307 */ 308static int 309acpi_probe(device_t dev) 310{ 311 ACPI_TABLE_HEADER th; 312 char buf[20]; 313 int error; 314 struct sbuf sb; 315 ACPI_STATUS status; 316 ACPI_LOCK_DECL; 317 318 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 319 320 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 321 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 322 323 device_printf(dev, "Other PM system enabled.\n"); 324 return_VALUE(ENXIO); 325 } 326 327 ACPI_LOCK; 328 329 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 330 device_printf(dev, "couldn't get XSDT header: %s\n", 331 AcpiFormatException(status)); 332 error = ENXIO; 333 } else { 334 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 335 sbuf_bcat(&sb, th.OemId, 6); 336 sbuf_trim(&sb); 337 sbuf_putc(&sb, ' '); 338 sbuf_bcat(&sb, th.OemTableId, 8); 339 sbuf_trim(&sb); 340 sbuf_finish(&sb); 341 device_set_desc_copy(dev, sbuf_data(&sb)); 342 sbuf_delete(&sb); 343 error = 0; 344 } 345 ACPI_UNLOCK; 346 return_VALUE(error); 347} 348 349static int 350acpi_attach(device_t dev) 351{ 352 struct acpi_softc *sc; 353 ACPI_STATUS status; 354 int error; 355 UINT32 flags; 356 char *env; 357#ifdef ACPI_DEBUGGER 358 char *debugpoint; 359#endif 360 ACPI_LOCK_DECL; 361 362 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 363 ACPI_LOCK; 364 sc = device_get_softc(dev); 365 bzero(sc, sizeof(*sc)); 366 sc->acpi_dev = dev; 367 368#ifdef ACPI_DEBUGGER 369 debugpoint = getenv("debug.acpi.debugger"); 370 if (debugpoint) { 371 if (!strcmp(debugpoint, "spaces")) 372 acpi_EnterDebugger(); 373 freeenv(debugpoint); 374 } 375#endif 376 377 /* Install the default address space handlers. */ 378 error = ENXIO; 379 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 380 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 381 if (ACPI_FAILURE(status)) { 382 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 383 AcpiFormatException(status)); 384 goto out; 385 } 386 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 387 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 388 if (ACPI_FAILURE(status)) { 389 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 390 AcpiFormatException(status)); 391 goto out; 392 } 393 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 394 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 395 if (ACPI_FAILURE(status)) { 396 device_printf(dev, "could not initialise PciConfig handler: %s\n", 397 AcpiFormatException(status)); 398 goto out; 399 } 400 401 /* 402 * Bring ACPI fully online. 403 * 404 * Note that some systems (specifically, those with namespace evaluation 405 * issues that require the avoidance of parts of the namespace) must 406 * avoid running _INI and _STA on everything, as well as dodging the final 407 * object init pass. 408 * 409 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 410 * 411 * XXX We should arrange for the object init pass after we have attached 412 * all our child devices, but on many systems it works here. 413 */ 414#ifdef ACPI_DEBUGGER 415 debugpoint = getenv("debug.acpi.debugger"); 416 if (debugpoint) { 417 if (!strcmp(debugpoint, "enable")) 418 acpi_EnterDebugger(); 419 freeenv(debugpoint); 420 } 421#endif 422 flags = 0; 423 if (testenv("debug.acpi.avoid")) 424 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 425 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 426 device_printf(dev, "Could not enable ACPI: %s\n", 427 AcpiFormatException(status)); 428 goto out; 429 } 430 431 /* 432 * Call the ECDT probe function to provide EC functionality before 433 * the namespace has been evaluated. 434 */ 435 acpi_ec_ecdt_probe(dev); 436 437 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 438 device_printf(dev, "Could not initialize ACPI objects: %s\n", 439 AcpiFormatException(status)); 440 goto out; 441 } 442 443 /* 444 * Setup our sysctl tree. 445 * 446 * XXX: This doesn't check to make sure that none of these fail. 447 */ 448 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 449 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 450 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 451 device_get_name(dev), CTLFLAG_RD, 0, ""); 452 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 453 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 454 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 455 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 456 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 457 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 458 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 459 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 460 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 461 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 462 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 463 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 464 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 465 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 466 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 467 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 468 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 469 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 470 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 471 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 472 &sc->acpi_sleep_delay, 0, "sleep delay"); 473 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 474 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 475 &sc->acpi_s4bios, 0, "S4BIOS mode"); 476 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 477 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 478 &sc->acpi_verbose, 0, "verbose mode"); 479 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 480 OID_AUTO, "disable_on_poweroff", CTLFLAG_RD | CTLFLAG_RW, 481 &sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff"); 482 483 /* 484 * Default to 5 seconds before sleeping to give some machines time to 485 * stabilize. 486 */ 487 sc->acpi_sleep_delay = 5; 488 sc->acpi_disable_on_poweroff = 1; 489 if (bootverbose) 490 sc->acpi_verbose = 1; 491 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) { 492 sc->acpi_verbose = 1; 493 freeenv(env); 494 } 495 496 /* Only enable S4BIOS by default if the FACS says it is available. */ 497 if (AcpiGbl_FACS->S4Bios_f != 0) 498 sc->acpi_s4bios = 1; 499 500 /* 501 * Dispatch the default sleep state to devices. 502 * TBD: should be configured from userland policy manager. 503 */ 504 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 505 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 506 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 507 sc->acpi_standby_sx = ACPI_STATE_S1; 508 sc->acpi_suspend_sx = ACPI_STATE_S3; 509 510 acpi_enable_fixed_events(sc); 511 512 /* 513 * Scan the namespace and attach/initialise children. 514 */ 515#ifdef ACPI_DEBUGGER 516 debugpoint = getenv("debug.acpi.debugger"); 517 if (debugpoint) { 518 if (!strcmp(debugpoint, "probe")) 519 acpi_EnterDebugger(); 520 freeenv(debugpoint); 521 } 522#endif 523 524 /* Register our shutdown handlers */ 525 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, 526 SHUTDOWN_PRI_LAST); 527 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 528 SHUTDOWN_PRI_LAST); 529 530 /* 531 * Register our acpi event handlers. 532 * XXX should be configurable eg. via userland policy manager. 533 */ 534 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 535 sc, ACPI_EVENT_PRI_LAST); 536 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 537 sc, ACPI_EVENT_PRI_LAST); 538 539 /* Flag our initial states. */ 540 sc->acpi_enabled = 1; 541 sc->acpi_sstate = ACPI_STATE_S0; 542 sc->acpi_sleep_disabled = 0; 543 544 /* Create the control device */ 545 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 546 "acpi"); 547 sc->acpi_dev_t->si_drv1 = sc; 548 549#ifdef ACPI_DEBUGGER 550 debugpoint = getenv("debug.acpi.debugger"); 551 if (debugpoint) { 552 if (strcmp(debugpoint, "running") == 0) 553 acpi_EnterDebugger(); 554 freeenv(debugpoint); 555 } 556#endif 557 558#ifdef ACPI_USE_THREADS 559 if ((error = acpi_task_thread_init())) 560 goto out; 561#endif 562 563 if ((error = acpi_machdep_init(dev))) 564 goto out; 565 566 /* Register ACPI again to pass the correct argument of pm_func. */ 567 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 568 569 if (!acpi_disabled("bus")) 570 acpi_probe_children(dev); 571 572 error = 0; 573 574 out: 575 ACPI_UNLOCK; 576 return_VALUE (error); 577} 578 579static void 580acpi_quirks_set() 581{ 582 XSDT_DESCRIPTOR *xsdt; 583 struct acpi_quirks *quirk; 584 char *env, *tmp; 585 int len; 586 587 /* 588 * If the user loaded a custom table or disabled "quirks", leave 589 * the settings alone. 590 */ 591 len = 0; 592 if ((env = getenv("acpi_dsdt_load")) != NULL) { 593 /* XXX No strcasecmp but this is good enough. */ 594 if (*env == 'Y' || *env == 'y') 595 goto out; 596 freeenv(env); 597 } 598 if ((env = getenv("debug.acpi.disabled")) != NULL) { 599 if (strstr("quirks", env) != NULL) 600 goto out; 601 len = strlen(env); 602 } 603 604 /* 605 * Search through our quirk table and concatenate the disabled 606 * values with whatever we find. 607 */ 608 xsdt = AcpiGbl_XSDT; 609 for (quirk = acpi_quirks_table; quirk->OemId; quirk++) { 610 if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) && 611 (xsdt->OemRevision == quirk->OemRevision || 612 quirk->OemRevision == ACPI_OEM_REV_ANY)) { 613 len += strlen(quirk->value) + 2; 614 if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL) 615 goto out; 616 sprintf(tmp, "%s %s", env ? env : "", quirk->value); 617 setenv("debug.acpi.disabled", tmp); 618 free(tmp, M_TEMP); 619 break; 620 } 621 } 622 623out: 624 if (env) 625 freeenv(env); 626} 627 628/* 629 * Handle a new device being added 630 */ 631static device_t 632acpi_add_child(device_t bus, int order, const char *name, int unit) 633{ 634 struct acpi_device *ad; 635 device_t child; 636 637 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 638 return (NULL); 639 640 resource_list_init(&ad->ad_rl); 641 642 child = device_add_child_ordered(bus, order, name, unit); 643 if (child != NULL) 644 device_set_ivars(child, ad); 645 return (child); 646} 647 648static int 649acpi_print_child(device_t bus, device_t child) 650{ 651 struct acpi_device *adev = device_get_ivars(child); 652 struct resource_list *rl = &adev->ad_rl; 653 int retval = 0; 654 655 retval += bus_print_child_header(bus, child); 656 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 657 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 658 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 659 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 660 retval += bus_print_child_footer(bus, child); 661 662 return (retval); 663} 664 665/* 666 * Handle per-device ivars 667 */ 668static int 669acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 670{ 671 struct acpi_device *ad; 672 673 if ((ad = device_get_ivars(child)) == NULL) { 674 printf("device has no ivars\n"); 675 return (ENOENT); 676 } 677 678 /* ACPI and ISA compatibility ivars */ 679 switch(index) { 680 case ACPI_IVAR_HANDLE: 681 *(ACPI_HANDLE *)result = ad->ad_handle; 682 break; 683 case ACPI_IVAR_MAGIC: 684 *(int *)result = ad->ad_magic; 685 break; 686 case ACPI_IVAR_PRIVATE: 687 *(void **)result = ad->ad_private; 688 break; 689 case ISA_IVAR_VENDORID: 690 case ISA_IVAR_SERIAL: 691 case ISA_IVAR_COMPATID: 692 *(int *)result = -1; 693 break; 694 case ISA_IVAR_LOGICALID: 695 *(int *)result = acpi_isa_get_logicalid(child); 696 break; 697 default: 698 return (ENOENT); 699 } 700 701 return (0); 702} 703 704static int 705acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 706{ 707 struct acpi_device *ad; 708 709 if ((ad = device_get_ivars(child)) == NULL) { 710 printf("device has no ivars\n"); 711 return (ENOENT); 712 } 713 714 switch(index) { 715 case ACPI_IVAR_HANDLE: 716 ad->ad_handle = (ACPI_HANDLE)value; 717 break; 718 case ACPI_IVAR_MAGIC: 719 ad->ad_magic = (int)value; 720 break; 721 case ACPI_IVAR_PRIVATE: 722 ad->ad_private = (void *)value; 723 break; 724 default: 725 panic("bad ivar write request (%d)", index); 726 return (ENOENT); 727 } 728 729 return (0); 730} 731 732ACPI_HANDLE 733acpi_get_handle(device_t dev) 734{ 735 uintptr_t up; 736 ACPI_HANDLE h; 737 738 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, &up)) 739 return(NULL); 740 h = (ACPI_HANDLE)up; 741 return (h); 742} 743 744int 745acpi_set_handle(device_t dev, ACPI_HANDLE h) 746{ 747 uintptr_t up; 748 749 up = (uintptr_t)h; 750 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_HANDLE, up)); 751} 752 753int 754acpi_get_magic(device_t dev) 755{ 756 uintptr_t up; 757 int m; 758 759 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, &up)) 760 return(0); 761 m = (int)up; 762 return (m); 763} 764 765int 766acpi_set_magic(device_t dev, int m) 767{ 768 uintptr_t up; 769 770 up = (uintptr_t)m; 771 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_MAGIC, up)); 772} 773 774void * 775acpi_get_private(device_t dev) 776{ 777 uintptr_t up; 778 void *p; 779 780 if (BUS_READ_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, &up)) 781 return (NULL); 782 p = (void *)up; 783 return (p); 784} 785 786int 787acpi_set_private(device_t dev, void *p) 788{ 789 uintptr_t up; 790 791 up = (uintptr_t)p; 792 return (BUS_WRITE_IVAR(device_get_parent(dev), dev, ACPI_IVAR_PRIVATE, up)); 793} 794 795ACPI_OBJECT_TYPE 796acpi_get_type(device_t dev) 797{ 798 ACPI_HANDLE h; 799 ACPI_OBJECT_TYPE t; 800 801 if ((h = acpi_get_handle(dev)) == NULL) 802 return (ACPI_TYPE_NOT_FOUND); 803 if (AcpiGetType(h, &t) != AE_OK) 804 return (ACPI_TYPE_NOT_FOUND); 805 return (t); 806} 807 808/* 809 * Handle child resource allocation/removal 810 */ 811static int 812acpi_set_resource(device_t dev, device_t child, int type, int rid, 813 u_long start, u_long count) 814{ 815 struct acpi_device *ad = device_get_ivars(child); 816 struct resource_list *rl = &ad->ad_rl; 817 818 resource_list_add(rl, type, rid, start, start + count -1, count); 819 820 return(0); 821} 822 823static int 824acpi_get_resource(device_t dev, device_t child, int type, int rid, 825 u_long *startp, u_long *countp) 826{ 827 struct acpi_device *ad = device_get_ivars(child); 828 struct resource_list *rl = &ad->ad_rl; 829 struct resource_list_entry *rle; 830 831 rle = resource_list_find(rl, type, rid); 832 if (!rle) 833 return(ENOENT); 834 835 if (startp) 836 *startp = rle->start; 837 if (countp) 838 *countp = rle->count; 839 840 return (0); 841} 842 843static struct resource * 844acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 845 u_long start, u_long end, u_long count, u_int flags) 846{ 847 struct acpi_device *ad = device_get_ivars(child); 848 struct resource_list *rl = &ad->ad_rl; 849 850 return (resource_list_alloc(rl, bus, child, type, rid, start, end, count, 851 flags)); 852} 853 854static int 855acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 856{ 857 struct acpi_device *ad = device_get_ivars(child); 858 struct resource_list *rl = &ad->ad_rl; 859 860 return (resource_list_release(rl, bus, child, type, rid, r)); 861} 862 863/* Allocate an IO port or memory resource, given its GAS. */ 864struct resource * 865acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas) 866{ 867 int type; 868 869 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) || 870 gas->RegisterBitWidth < 8) 871 return (NULL); 872 873 switch (gas->AddressSpaceId) { 874 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 875 type = SYS_RES_MEMORY; 876 break; 877 case ACPI_ADR_SPACE_SYSTEM_IO: 878 type = SYS_RES_IOPORT; 879 break; 880 default: 881 return (NULL); 882 } 883 884 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8); 885 return (bus_alloc_resource(dev, type, rid, 0, ~0, 1, RF_ACTIVE)); 886} 887 888/* 889 * Handle ISA-like devices probing for a PnP ID to match. 890 */ 891#define PNP_EISAID(s) \ 892 ((((s[0] - '@') & 0x1f) << 2) \ 893 | (((s[1] - '@') & 0x18) >> 3) \ 894 | (((s[1] - '@') & 0x07) << 13) \ 895 | (((s[2] - '@') & 0x1f) << 8) \ 896 | (PNP_HEXTONUM(s[4]) << 16) \ 897 | (PNP_HEXTONUM(s[3]) << 20) \ 898 | (PNP_HEXTONUM(s[6]) << 24) \ 899 | (PNP_HEXTONUM(s[5]) << 28)) 900 901static uint32_t 902acpi_isa_get_logicalid(device_t dev) 903{ 904 ACPI_DEVICE_INFO *devinfo; 905 ACPI_BUFFER buf; 906 ACPI_HANDLE h; 907 ACPI_STATUS error; 908 u_int32_t pnpid; 909 ACPI_LOCK_DECL; 910 911 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 912 913 pnpid = 0; 914 buf.Pointer = NULL; 915 buf.Length = ACPI_ALLOCATE_BUFFER; 916 917 ACPI_LOCK; 918 919 /* Fetch and validate the HID. */ 920 if ((h = acpi_get_handle(dev)) == NULL) 921 goto out; 922 error = AcpiGetObjectInfo(h, &buf); 923 if (ACPI_FAILURE(error)) 924 goto out; 925 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 926 927 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 928 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 929 930out: 931 if (buf.Pointer != NULL) 932 AcpiOsFree(buf.Pointer); 933 ACPI_UNLOCK; 934 return_VALUE (pnpid); 935} 936 937static int 938acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 939{ 940 ACPI_DEVICE_INFO *devinfo; 941 ACPI_BUFFER buf; 942 ACPI_HANDLE h; 943 ACPI_STATUS error; 944 uint32_t *pnpid; 945 int valid, i; 946 ACPI_LOCK_DECL; 947 948 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 949 950 pnpid = cids; 951 valid = 0; 952 buf.Pointer = NULL; 953 buf.Length = ACPI_ALLOCATE_BUFFER; 954 955 ACPI_LOCK; 956 957 /* Fetch and validate the CID */ 958 if ((h = acpi_get_handle(dev)) == NULL) 959 goto out; 960 error = AcpiGetObjectInfo(h, &buf); 961 if (ACPI_FAILURE(error)) 962 goto out; 963 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 964 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 965 goto out; 966 967 if (devinfo->CompatibilityId.Count < count) 968 count = devinfo->CompatibilityId.Count; 969 for (i = 0; i < count; i++) { 970 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 971 continue; 972 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 973 valid++; 974 } 975 976out: 977 if (buf.Pointer != NULL) 978 AcpiOsFree(buf.Pointer); 979 ACPI_UNLOCK; 980 return_VALUE (valid); 981} 982 983static int 984acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 985{ 986 int result, cid_count, i; 987 uint32_t lid, cids[8]; 988 989 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 990 991 /* 992 * ISA-style drivers attached to ACPI may persist and 993 * probe manually if we return ENOENT. We never want 994 * that to happen, so don't ever return it. 995 */ 996 result = ENXIO; 997 998 /* Scan the supplied IDs for a match */ 999 lid = acpi_isa_get_logicalid(child); 1000 cid_count = acpi_isa_get_compatid(child, cids, 8); 1001 while (ids && ids->ip_id) { 1002 if (lid == ids->ip_id) { 1003 result = 0; 1004 goto out; 1005 } 1006 for (i = 0; i < cid_count; i++) { 1007 if (cids[i] == ids->ip_id) { 1008 result = 0; 1009 goto out; 1010 } 1011 } 1012 ids++; 1013 } 1014 1015 out: 1016 return_VALUE (result); 1017} 1018 1019/* 1020 * Scan relevant portions of the ACPI namespace and attach child devices. 1021 * 1022 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and 1023 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 1024 */ 1025static void 1026acpi_probe_children(device_t bus) 1027{ 1028 ACPI_HANDLE parent; 1029 ACPI_STATUS status; 1030 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 1031 int i; 1032 1033 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1034 ACPI_ASSERTLOCK; 1035 1036 /* Create any static children by calling device identify methods. */ 1037 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1038 bus_generic_probe(bus); 1039 1040 /* 1041 * Scan the namespace and insert placeholders for all the devices that 1042 * we find. 1043 * 1044 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1045 * we want to create nodes for all devices, not just those that are 1046 * currently present. (This assumes that we don't want to create/remove 1047 * devices as they appear, which might be smarter.) 1048 */ 1049 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1050 for (i = 0; scopes[i] != NULL; i++) { 1051 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent); 1052 if (ACPI_SUCCESS(status)) { 1053 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, 1054 bus, NULL); 1055 } 1056 } 1057 1058 /* 1059 * Scan all of the child devices we have created and let them probe/attach. 1060 */ 1061 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1062 bus_generic_attach(bus); 1063 1064 /* 1065 * Some of these children may have attached others as part of their attach 1066 * process (eg. the root PCI bus driver), so rescan. 1067 */ 1068 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1069 bus_generic_attach(bus); 1070 1071 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1072 return_VOID; 1073} 1074 1075/* 1076 * Evaluate a child device and determine whether we might attach a device to 1077 * it. 1078 */ 1079static ACPI_STATUS 1080acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1081{ 1082 ACPI_OBJECT_TYPE type; 1083 device_t child, bus = (device_t)context; 1084 1085 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1086 1087 /* Skip this device if we think we'll have trouble with it. */ 1088 if (acpi_avoid(handle)) 1089 return_ACPI_STATUS (AE_OK); 1090 1091 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1092 switch(type) { 1093 case ACPI_TYPE_DEVICE: 1094 case ACPI_TYPE_PROCESSOR: 1095 case ACPI_TYPE_THERMAL: 1096 case ACPI_TYPE_POWER: 1097 if (acpi_disabled("children")) 1098 break; 1099 1100 /* 1101 * Create a placeholder device for this node. Sort the placeholder 1102 * so that the probe/attach passes will run breadth-first. 1103 */ 1104 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", 1105 acpi_name(handle))); 1106 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 1107 if (child == NULL) 1108 break; 1109 acpi_set_handle(child, handle); 1110 1111 /* 1112 * Check that the device is present. If it's not present, 1113 * leave it disabled (so that we have a device_t attached to 1114 * the handle, but we don't probe it). 1115 */ 1116 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1117 device_disable(child); 1118 break; 1119 } 1120 1121 /* 1122 * Get the device's resource settings and attach them. 1123 * Note that if the device has _PRS but no _CRS, we need 1124 * to decide when it's appropriate to try to configure the 1125 * device. Ignore the return value here; it's OK for the 1126 * device not to have any resources. 1127 */ 1128 acpi_parse_resources(child, handle, &acpi_res_parse_set); 1129 1130 /* If we're debugging, probe/attach now rather than later */ 1131 ACPI_DEBUG_EXEC(device_probe_and_attach(child)); 1132 break; 1133 } 1134 } 1135 1136 return_ACPI_STATUS (AE_OK); 1137} 1138 1139static void 1140acpi_shutdown_pre_sync(void *arg, int howto) 1141{ 1142 struct acpi_softc *sc = arg; 1143 1144 ACPI_ASSERTLOCK; 1145 1146 /* 1147 * Disable all ACPI events before soft off, otherwise the system 1148 * will be turned on again on some laptops. 1149 * 1150 * XXX this should probably be restricted to masking some events just 1151 * before powering down, since we may still need ACPI during the 1152 * shutdown process. 1153 */ 1154 if (sc->acpi_disable_on_poweroff) 1155 acpi_Disable(sc); 1156} 1157 1158static void 1159acpi_shutdown_final(void *arg, int howto) 1160{ 1161 ACPI_STATUS status; 1162 1163 ACPI_ASSERTLOCK; 1164 1165 if ((howto & RB_POWEROFF) != 0) { 1166 printf("Powering system off using ACPI\n"); 1167 status = AcpiEnterSleepStatePrep(acpi_off_state); 1168 if (ACPI_FAILURE(status)) { 1169 printf("AcpiEnterSleepStatePrep failed - %s\n", 1170 AcpiFormatException(status)); 1171 return; 1172 } 1173 ACPI_DISABLE_IRQS(); 1174 status = AcpiEnterSleepState(acpi_off_state); 1175 if (ACPI_FAILURE(status)) { 1176 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1177 } else { 1178 DELAY(1000000); 1179 printf("ACPI power-off failed - timeout\n"); 1180 } 1181 } else { 1182 printf("Shutting down ACPI\n"); 1183 AcpiTerminate(); 1184 } 1185} 1186 1187static void 1188acpi_enable_fixed_events(struct acpi_softc *sc) 1189{ 1190 static int first_time = 1; 1191 1192 ACPI_ASSERTLOCK; 1193 1194 /* Enable and clear fixed events and install handlers. */ 1195 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1196 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1197 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1198 acpi_event_power_button_sleep, sc); 1199 if (first_time) 1200 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1201 } 1202 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1203 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1204 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1205 acpi_event_sleep_button_sleep, sc); 1206 if (first_time) 1207 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1208 } 1209 1210 first_time = 0; 1211} 1212 1213/* 1214 * Returns true if the device is actually present and should 1215 * be attached to. This requires the present, enabled, UI-visible 1216 * and diagnostics-passed bits to be set. 1217 */ 1218BOOLEAN 1219acpi_DeviceIsPresent(device_t dev) 1220{ 1221 ACPI_DEVICE_INFO *devinfo; 1222 ACPI_HANDLE h; 1223 ACPI_BUFFER buf; 1224 ACPI_STATUS error; 1225 int ret; 1226 1227 ACPI_ASSERTLOCK; 1228 1229 ret = FALSE; 1230 if ((h = acpi_get_handle(dev)) == NULL) 1231 return (FALSE); 1232 buf.Pointer = NULL; 1233 buf.Length = ACPI_ALLOCATE_BUFFER; 1234 error = AcpiGetObjectInfo(h, &buf); 1235 if (ACPI_FAILURE(error)) 1236 return (FALSE); 1237 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1238 1239 /* If no _STA method, must be present */ 1240 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1241 ret = TRUE; 1242 1243 /* Return true for 'present' and 'functioning' */ 1244 if ((devinfo->CurrentStatus & 0x9) == 0x9) 1245 ret = TRUE; 1246 1247 AcpiOsFree(buf.Pointer); 1248 return (ret); 1249} 1250 1251/* 1252 * Returns true if the battery is actually present and inserted. 1253 */ 1254BOOLEAN 1255acpi_BatteryIsPresent(device_t dev) 1256{ 1257 ACPI_DEVICE_INFO *devinfo; 1258 ACPI_HANDLE h; 1259 ACPI_BUFFER buf; 1260 ACPI_STATUS error; 1261 int ret; 1262 1263 ACPI_ASSERTLOCK; 1264 1265 ret = FALSE; 1266 if ((h = acpi_get_handle(dev)) == NULL) 1267 return (FALSE); 1268 buf.Pointer = NULL; 1269 buf.Length = ACPI_ALLOCATE_BUFFER; 1270 error = AcpiGetObjectInfo(h, &buf); 1271 if (ACPI_FAILURE(error)) 1272 return (FALSE); 1273 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1274 1275 /* If no _STA method, must be present */ 1276 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1277 ret = TRUE; 1278 1279 /* Return true for 'present' and 'functioning' */ 1280 if ((devinfo->CurrentStatus & 0x19) == 0x19) 1281 ret = TRUE; 1282 1283 AcpiOsFree(buf.Pointer); 1284 return (ret); 1285} 1286 1287/* 1288 * Match a HID string against a device 1289 */ 1290BOOLEAN 1291acpi_MatchHid(device_t dev, char *hid) 1292{ 1293 ACPI_DEVICE_INFO *devinfo; 1294 ACPI_HANDLE h; 1295 ACPI_BUFFER buf; 1296 ACPI_STATUS error; 1297 int ret, i; 1298 1299 ACPI_ASSERTLOCK; 1300 1301 ret = FALSE; 1302 if (hid == NULL) 1303 return (FALSE); 1304 if ((h = acpi_get_handle(dev)) == NULL) 1305 return (FALSE); 1306 buf.Pointer = NULL; 1307 buf.Length = ACPI_ALLOCATE_BUFFER; 1308 error = AcpiGetObjectInfo(h, &buf); 1309 if (ACPI_FAILURE(error)) 1310 return (FALSE); 1311 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1312 1313 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1314 strcmp(hid, devinfo->HardwareId.Value) == 0) 1315 ret = TRUE; 1316 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1317 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1318 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1319 ret = TRUE; 1320 break; 1321 } 1322 } 1323 } 1324 1325 AcpiOsFree(buf.Pointer); 1326 return (ret); 1327} 1328 1329/* 1330 * Return the handle of a named object within our scope, ie. that of (parent) 1331 * or one if its parents. 1332 */ 1333ACPI_STATUS 1334acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1335{ 1336 ACPI_HANDLE r; 1337 ACPI_STATUS status; 1338 1339 ACPI_ASSERTLOCK; 1340 1341 /* Walk back up the tree to the root */ 1342 for (;;) { 1343 status = AcpiGetHandle(parent, path, &r); 1344 if (ACPI_SUCCESS(status)) { 1345 *result = r; 1346 return (AE_OK); 1347 } 1348 if (status != AE_NOT_FOUND) 1349 return (AE_OK); 1350 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1351 return (AE_NOT_FOUND); 1352 parent = r; 1353 } 1354} 1355 1356/* 1357 * Allocate a buffer with a preset data size. 1358 */ 1359ACPI_BUFFER * 1360acpi_AllocBuffer(int size) 1361{ 1362 ACPI_BUFFER *buf; 1363 1364 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1365 return (NULL); 1366 buf->Length = size; 1367 buf->Pointer = (void *)(buf + 1); 1368 return (buf); 1369} 1370 1371ACPI_STATUS 1372acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1373{ 1374 ACPI_OBJECT arg1; 1375 ACPI_OBJECT_LIST args; 1376 1377 ACPI_ASSERTLOCK; 1378 1379 arg1.Type = ACPI_TYPE_INTEGER; 1380 arg1.Integer.Value = number; 1381 args.Count = 1; 1382 args.Pointer = &arg1; 1383 1384 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1385} 1386 1387/* 1388 * Evaluate a path that should return an integer. 1389 */ 1390ACPI_STATUS 1391acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1392{ 1393 ACPI_STATUS status; 1394 ACPI_BUFFER buf; 1395 ACPI_OBJECT param; 1396 1397 ACPI_ASSERTLOCK; 1398 1399 if (handle == NULL) 1400 handle = ACPI_ROOT_OBJECT; 1401 1402 /* 1403 * Assume that what we've been pointed at is an Integer object, or 1404 * a method that will return an Integer. 1405 */ 1406 buf.Pointer = ¶m; 1407 buf.Length = sizeof(param); 1408 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1409 if (ACPI_SUCCESS(status)) { 1410 if (param.Type == ACPI_TYPE_INTEGER) 1411 *number = param.Integer.Value; 1412 else 1413 status = AE_TYPE; 1414 } 1415 1416 /* 1417 * In some applications, a method that's expected to return an Integer 1418 * may instead return a Buffer (probably to simplify some internal 1419 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1420 * convert it into an Integer as best we can. 1421 * 1422 * This is a hack. 1423 */ 1424 if (status == AE_BUFFER_OVERFLOW) { 1425 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1426 status = AE_NO_MEMORY; 1427 } else { 1428 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1429 if (ACPI_SUCCESS(status)) 1430 status = acpi_ConvertBufferToInteger(&buf, number); 1431 AcpiOsFree(buf.Pointer); 1432 } 1433 } 1434 return (status); 1435} 1436 1437ACPI_STATUS 1438acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1439{ 1440 ACPI_OBJECT *p; 1441 UINT8 *val; 1442 int i; 1443 1444 p = (ACPI_OBJECT *)bufp->Pointer; 1445 if (p->Type == ACPI_TYPE_INTEGER) { 1446 *number = p->Integer.Value; 1447 return (AE_OK); 1448 } 1449 if (p->Type != ACPI_TYPE_BUFFER) 1450 return (AE_TYPE); 1451 if (p->Buffer.Length > sizeof(int)) 1452 return (AE_BAD_DATA); 1453 1454 *number = 0; 1455 val = p->Buffer.Pointer; 1456 for (i = 0; i < p->Buffer.Length; i++) 1457 *number += val[i] << (i * 8); 1458 return (AE_OK); 1459} 1460 1461/* 1462 * Iterate over the elements of an a package object, calling the supplied 1463 * function for each element. 1464 * 1465 * XXX possible enhancement might be to abort traversal on error. 1466 */ 1467ACPI_STATUS 1468acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1469 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1470{ 1471 ACPI_OBJECT *comp; 1472 int i; 1473 1474 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1475 return (AE_BAD_PARAMETER); 1476 1477 /* Iterate over components */ 1478 i = 0; 1479 comp = pkg->Package.Elements; 1480 for (; i < pkg->Package.Count; i++, comp++) 1481 func(comp, arg); 1482 1483 return (AE_OK); 1484} 1485 1486/* 1487 * Find the (index)th resource object in a set. 1488 */ 1489ACPI_STATUS 1490acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1491{ 1492 ACPI_RESOURCE *rp; 1493 int i; 1494 1495 rp = (ACPI_RESOURCE *)buf->Pointer; 1496 i = index; 1497 while (i-- > 0) { 1498 /* Range check */ 1499 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1500 return (AE_BAD_PARAMETER); 1501 1502 /* Check for terminator */ 1503 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1504 return (AE_NOT_FOUND); 1505 rp = ACPI_NEXT_RESOURCE(rp); 1506 } 1507 if (resp != NULL) 1508 *resp = rp; 1509 1510 return (AE_OK); 1511} 1512 1513/* 1514 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1515 * 1516 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1517 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1518 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1519 * resources. 1520 */ 1521#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1522 1523ACPI_STATUS 1524acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1525{ 1526 ACPI_RESOURCE *rp; 1527 void *newp; 1528 1529 /* Initialise the buffer if necessary. */ 1530 if (buf->Pointer == NULL) { 1531 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1532 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1533 return (AE_NO_MEMORY); 1534 rp = (ACPI_RESOURCE *)buf->Pointer; 1535 rp->Id = ACPI_RSTYPE_END_TAG; 1536 rp->Length = 0; 1537 } 1538 if (res == NULL) 1539 return (AE_OK); 1540 1541 /* 1542 * Scan the current buffer looking for the terminator. 1543 * This will either find the terminator or hit the end 1544 * of the buffer and return an error. 1545 */ 1546 rp = (ACPI_RESOURCE *)buf->Pointer; 1547 for (;;) { 1548 /* Range check, don't go outside the buffer */ 1549 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1550 return (AE_BAD_PARAMETER); 1551 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0) 1552 break; 1553 rp = ACPI_NEXT_RESOURCE(rp); 1554 } 1555 1556 /* 1557 * Check the size of the buffer and expand if required. 1558 * 1559 * Required size is: 1560 * size of existing resources before terminator + 1561 * size of new resource and header + 1562 * size of terminator. 1563 * 1564 * Note that this loop should really only run once, unless 1565 * for some reason we are stuffing a *really* huge resource. 1566 */ 1567 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1568 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1569 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1570 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1571 return (AE_NO_MEMORY); 1572 bcopy(buf->Pointer, newp, buf->Length); 1573 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1574 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1575 AcpiOsFree(buf->Pointer); 1576 buf->Pointer = newp; 1577 buf->Length += buf->Length; 1578 } 1579 1580 /* Insert the new resource. */ 1581 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1582 1583 /* And add the terminator. */ 1584 rp = ACPI_NEXT_RESOURCE(rp); 1585 rp->Id = ACPI_RSTYPE_END_TAG; 1586 rp->Length = 0; 1587 1588 return (AE_OK); 1589} 1590 1591/* 1592 * Set interrupt model. 1593 */ 1594ACPI_STATUS 1595acpi_SetIntrModel(int model) 1596{ 1597 1598 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 1599} 1600 1601#define ACPI_MINIMUM_AWAKETIME 5 1602 1603static void 1604acpi_sleep_enable(void *arg) 1605{ 1606 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 1607} 1608 1609/* 1610 * Set the system sleep state 1611 * 1612 * Currently we support S1-S5 but S4 is only S4BIOS 1613 */ 1614ACPI_STATUS 1615acpi_SetSleepState(struct acpi_softc *sc, int state) 1616{ 1617 ACPI_STATUS status = AE_OK; 1618 UINT8 TypeA; 1619 UINT8 TypeB; 1620 1621 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1622 ACPI_ASSERTLOCK; 1623 1624 /* Avoid reentry if already attempting to suspend. */ 1625 if (sc->acpi_sstate != ACPI_STATE_S0) 1626 return_ACPI_STATUS (AE_BAD_PARAMETER); 1627 1628 /* We recently woke up so don't suspend again for a while. */ 1629 if (sc->acpi_sleep_disabled) 1630 return_ACPI_STATUS (AE_OK); 1631 1632 switch (state) { 1633 case ACPI_STATE_S1: 1634 case ACPI_STATE_S2: 1635 case ACPI_STATE_S3: 1636 case ACPI_STATE_S4: 1637 status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB); 1638 if (status == AE_NOT_FOUND) { 1639 device_printf(sc->acpi_dev, 1640 "Sleep state S%d not supported by BIOS\n", state); 1641 break; 1642 } else if (ACPI_FAILURE(status)) { 1643 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 1644 AcpiFormatException(status)); 1645 break; 1646 } 1647 1648 sc->acpi_sstate = state; 1649 sc->acpi_sleep_disabled = 1; 1650 1651 /* Inform all devices that we are going to sleep. */ 1652 if (DEVICE_SUSPEND(root_bus) != 0) { 1653 /* 1654 * Re-wake the system. 1655 * 1656 * XXX note that a better two-pass approach with a 'veto' pass 1657 * followed by a "real thing" pass would be better, but the 1658 * current bus interface does not provide for this. 1659 */ 1660 DEVICE_RESUME(root_bus); 1661 return_ACPI_STATUS (AE_ERROR); 1662 } 1663 1664 status = AcpiEnterSleepStatePrep(state); 1665 if (ACPI_FAILURE(status)) { 1666 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1667 AcpiFormatException(status)); 1668 break; 1669 } 1670 1671 if (sc->acpi_sleep_delay > 0) 1672 DELAY(sc->acpi_sleep_delay * 1000000); 1673 1674 if (state != ACPI_STATE_S1) { 1675 acpi_sleep_machdep(sc, state); 1676 1677 /* AcpiEnterSleepState() may be incomplete, unlock if locked. */ 1678 if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId != 1679 ACPI_MUTEX_NOT_ACQUIRED) { 1680 1681 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1682 } 1683 1684 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1685 if (state == ACPI_STATE_S4) 1686 AcpiEnable(); 1687 } else { 1688 status = AcpiEnterSleepState((UINT8)state); 1689 if (ACPI_FAILURE(status)) { 1690 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 1691 AcpiFormatException(status)); 1692 break; 1693 } 1694 } 1695 AcpiLeaveSleepState((UINT8)state); 1696 DEVICE_RESUME(root_bus); 1697 sc->acpi_sstate = ACPI_STATE_S0; 1698 acpi_enable_fixed_events(sc); 1699 break; 1700 case ACPI_STATE_S5: 1701 /* 1702 * Shut down cleanly and power off. This will call us back through the 1703 * shutdown handlers. 1704 */ 1705 shutdown_nice(RB_POWEROFF); 1706 break; 1707 case ACPI_STATE_S0: 1708 default: 1709 status = AE_BAD_PARAMETER; 1710 break; 1711 } 1712 1713 /* Disable a second sleep request for a short period */ 1714 if (sc->acpi_sleep_disabled) 1715 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 1716 1717 return_ACPI_STATUS (status); 1718} 1719 1720/* 1721 * Enable/Disable ACPI 1722 */ 1723ACPI_STATUS 1724acpi_Enable(struct acpi_softc *sc) 1725{ 1726 ACPI_STATUS status; 1727 u_int32_t flags; 1728 1729 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1730 ACPI_ASSERTLOCK; 1731 1732 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1733 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1734 if (!sc->acpi_enabled) 1735 status = AcpiEnableSubsystem(flags); 1736 else 1737 status = AE_OK; 1738 1739 if (status == AE_OK) 1740 sc->acpi_enabled = 1; 1741 1742 return_ACPI_STATUS (status); 1743} 1744 1745ACPI_STATUS 1746acpi_Disable(struct acpi_softc *sc) 1747{ 1748 ACPI_STATUS status; 1749 1750 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1751 ACPI_ASSERTLOCK; 1752 1753 if (sc->acpi_enabled) 1754 status = AcpiDisable(); 1755 else 1756 status = AE_OK; 1757 1758 if (status == AE_OK) 1759 sc->acpi_enabled = 0; 1760 1761 return_ACPI_STATUS (status); 1762} 1763 1764/* 1765 * ACPI Event Handlers 1766 */ 1767 1768/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1769 1770static void 1771acpi_system_eventhandler_sleep(void *arg, int state) 1772{ 1773 ACPI_LOCK_DECL; 1774 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1775 1776 ACPI_LOCK; 1777 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1778 acpi_SetSleepState((struct acpi_softc *)arg, state); 1779 ACPI_UNLOCK; 1780 return_VOID; 1781} 1782 1783static void 1784acpi_system_eventhandler_wakeup(void *arg, int state) 1785{ 1786 ACPI_LOCK_DECL; 1787 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 1788 1789 /* Well, what to do? :-) */ 1790 1791 ACPI_LOCK; 1792 ACPI_UNLOCK; 1793 1794 return_VOID; 1795} 1796 1797/* 1798 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1799 */ 1800UINT32 1801acpi_event_power_button_sleep(void *context) 1802{ 1803 struct acpi_softc *sc = (struct acpi_softc *)context; 1804 1805 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1806 1807 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1808 1809 return_VALUE (ACPI_INTERRUPT_HANDLED); 1810} 1811 1812UINT32 1813acpi_event_power_button_wake(void *context) 1814{ 1815 struct acpi_softc *sc = (struct acpi_softc *)context; 1816 1817 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1818 1819 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1820 1821 return_VALUE (ACPI_INTERRUPT_HANDLED); 1822} 1823 1824UINT32 1825acpi_event_sleep_button_sleep(void *context) 1826{ 1827 struct acpi_softc *sc = (struct acpi_softc *)context; 1828 1829 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1830 1831 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1832 1833 return_VALUE (ACPI_INTERRUPT_HANDLED); 1834} 1835 1836UINT32 1837acpi_event_sleep_button_wake(void *context) 1838{ 1839 struct acpi_softc *sc = (struct acpi_softc *)context; 1840 1841 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1842 1843 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1844 1845 return_VALUE (ACPI_INTERRUPT_HANDLED); 1846} 1847 1848/* 1849 * XXX This is kinda ugly, and should not be here. 1850 */ 1851struct acpi_staticbuf { 1852 ACPI_BUFFER buffer; 1853 char data[512]; 1854}; 1855 1856char * 1857acpi_name(ACPI_HANDLE handle) 1858{ 1859 static struct acpi_staticbuf buf; 1860 1861 ACPI_ASSERTLOCK; 1862 1863 buf.buffer.Length = 512; 1864 buf.buffer.Pointer = &buf.data[0]; 1865 1866 if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer))) 1867 return (buf.buffer.Pointer); 1868 1869 return ("(unknown path)"); 1870} 1871 1872/* 1873 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1874 * parts of the namespace. 1875 */ 1876int 1877acpi_avoid(ACPI_HANDLE handle) 1878{ 1879 char *cp, *env, *np; 1880 int len; 1881 1882 np = acpi_name(handle); 1883 if (*np == '\\') 1884 np++; 1885 if ((env = getenv("debug.acpi.avoid")) == NULL) 1886 return (0); 1887 1888 /* Scan the avoid list checking for a match */ 1889 cp = env; 1890 for (;;) { 1891 while ((*cp != 0) && isspace(*cp)) 1892 cp++; 1893 if (*cp == 0) 1894 break; 1895 len = 0; 1896 while ((cp[len] != 0) && !isspace(cp[len])) 1897 len++; 1898 if (!strncmp(cp, np, len)) { 1899 freeenv(env); 1900 return(1); 1901 } 1902 cp += len; 1903 } 1904 freeenv(env); 1905 1906 return (0); 1907} 1908 1909/* 1910 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1911 */ 1912int 1913acpi_disabled(char *subsys) 1914{ 1915 char *cp, *env; 1916 int len; 1917 1918 if ((env = getenv("debug.acpi.disabled")) == NULL) 1919 return (0); 1920 if (strcmp(env, "all") == 0) { 1921 freeenv(env); 1922 return (1); 1923 } 1924 1925 /* Scan the disable list, checking for a match. */ 1926 cp = env; 1927 for (;;) { 1928 while (*cp != '\0' && isspace(*cp)) 1929 cp++; 1930 if (*cp == '\0') 1931 break; 1932 len = 0; 1933 while (cp[len] != '\0' && !isspace(cp[len])) 1934 len++; 1935 if (strncmp(cp, subsys, len) == 0) { 1936 freeenv(env); 1937 return (1); 1938 } 1939 cp += len; 1940 } 1941 freeenv(env); 1942 1943 return (0); 1944} 1945 1946/* 1947 * Device wake capability enable/disable. 1948 */ 1949void 1950acpi_device_enable_wake_capability(ACPI_HANDLE h, int enable) 1951{ 1952 /* 1953 * TBD: All Power Resources referenced by elements 2 through N 1954 * of the _PRW object are put into the ON state. 1955 */ 1956 1957 (void)acpi_SetInteger(h, "_PSW", enable); 1958} 1959 1960void 1961acpi_device_enable_wake_event(ACPI_HANDLE h) 1962{ 1963 struct acpi_softc *sc; 1964 ACPI_STATUS status; 1965 ACPI_BUFFER prw_buffer; 1966 ACPI_OBJECT *res; 1967 1968 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1969 1970 sc = devclass_get_softc(acpi_devclass, 0); 1971 if (sc == NULL) 1972 return; 1973 1974 /* 1975 * _PRW object is only required for devices that have the ability 1976 * to wake the system from a system sleeping state. 1977 */ 1978 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 1979 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 1980 if (ACPI_FAILURE(status)) 1981 return; 1982 1983 res = (ACPI_OBJECT *)prw_buffer.Pointer; 1984 if (res == NULL) 1985 return; 1986 1987 if ((res->Type != ACPI_TYPE_PACKAGE) || (res->Package.Count < 2)) { 1988 goto out; 1989 } 1990 1991 /* 1992 * The element 1 of the _PRW object: 1993 * The lowest power system sleeping state that can be entered 1994 * while still providing wake functionality. 1995 * The sleeping state being entered must be greater or equal to 1996 * the power state declared in element 1 of the _PRW object. 1997 */ 1998 if (res->Package.Elements[1].Type != ACPI_TYPE_INTEGER) 1999 goto out; 2000 2001 if (sc->acpi_sstate > res->Package.Elements[1].Integer.Value) 2002 goto out; 2003 2004 /* 2005 * The element 0 of the _PRW object: 2006 */ 2007 switch(res->Package.Elements[0].Type) { 2008 case ACPI_TYPE_INTEGER: 2009 /* 2010 * If the data type of this package element is numeric, then this 2011 * _PRW package element is the bit index in the GPEx_EN, in the 2012 * GPE blocks described in the FADT, of the enable bit that is 2013 * enabled for the wake event. 2014 */ 2015 2016 status = AcpiEnableGpe(NULL, res->Package.Elements[0].Integer.Value, 2017 ACPI_EVENT_WAKE_ENABLE); 2018 if (ACPI_FAILURE(status)) 2019 printf("%s: EnableEvent Failed\n", __func__); 2020 break; 2021 case ACPI_TYPE_PACKAGE: 2022 /* 2023 * XXX TBD 2024 * 2025 * If the data type of this package element is a package, then this 2026 * _PRW package element is itself a package containing two 2027 * elements. The first is an object reference to the GPE Block 2028 * device that contains the GPE that will be triggered by the wake 2029 * event. The second element is numeric and it contains the bit 2030 * index in the GPEx_EN, in the GPE Block referenced by the 2031 * first element in the package, of the enable bit that is enabled for 2032 * the wake event. 2033 * For example, if this field is a package then it is of the form: 2034 * Package() {\_SB.PCI0.ISA.GPE, 2} 2035 */ 2036 break; 2037 default: 2038 break; 2039 } 2040 2041out: 2042 if (prw_buffer.Pointer != NULL) 2043 AcpiOsFree(prw_buffer.Pointer); 2044} 2045 2046/* 2047 * Control interface. 2048 * 2049 * We multiplex ioctls for all participating ACPI devices here. Individual 2050 * drivers wanting to be accessible via /dev/acpi should use the 2051 * register/deregister interface to make their handlers visible. 2052 */ 2053struct acpi_ioctl_hook 2054{ 2055 TAILQ_ENTRY(acpi_ioctl_hook) link; 2056 u_long cmd; 2057 acpi_ioctl_fn fn; 2058 void *arg; 2059}; 2060 2061static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2062static int acpi_ioctl_hooks_initted; 2063 2064/* 2065 * Register an ioctl handler. 2066 */ 2067int 2068acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2069{ 2070 struct acpi_ioctl_hook *hp; 2071 2072 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2073 return (ENOMEM); 2074 hp->cmd = cmd; 2075 hp->fn = fn; 2076 hp->arg = arg; 2077 if (acpi_ioctl_hooks_initted == 0) { 2078 TAILQ_INIT(&acpi_ioctl_hooks); 2079 acpi_ioctl_hooks_initted = 1; 2080 } 2081 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2082 return (0); 2083} 2084 2085/* 2086 * Deregister an ioctl handler. 2087 */ 2088void 2089acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2090{ 2091 struct acpi_ioctl_hook *hp; 2092 2093 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2094 if ((hp->cmd == cmd) && (hp->fn == fn)) 2095 break; 2096 2097 if (hp != NULL) { 2098 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2099 free(hp, M_ACPIDEV); 2100 } 2101} 2102 2103static int 2104acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td) 2105{ 2106 return (0); 2107} 2108 2109static int 2110acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td) 2111{ 2112 return (0); 2113} 2114 2115static int 2116acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2117{ 2118 struct acpi_softc *sc; 2119 struct acpi_ioctl_hook *hp; 2120 int error, xerror, state; 2121 ACPI_LOCK_DECL; 2122 2123 ACPI_LOCK; 2124 2125 error = state = 0; 2126 sc = dev->si_drv1; 2127 2128 /* 2129 * Scan the list of registered ioctls, looking for handlers. 2130 */ 2131 if (acpi_ioctl_hooks_initted) { 2132 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2133 if (hp->cmd == cmd) { 2134 xerror = hp->fn(cmd, addr, hp->arg); 2135 if (xerror != 0) 2136 error = xerror; 2137 goto out; 2138 } 2139 } 2140 } 2141 2142 /* 2143 * Core ioctls are not permitted for non-writable user. 2144 * Currently, other ioctls just fetch information. 2145 * Not changing system behavior. 2146 */ 2147 if((flag & FWRITE) == 0) 2148 return (EPERM); 2149 2150 /* Core system ioctls. */ 2151 switch (cmd) { 2152 case ACPIIO_ENABLE: 2153 if (ACPI_FAILURE(acpi_Enable(sc))) 2154 error = ENXIO; 2155 break; 2156 case ACPIIO_DISABLE: 2157 if (ACPI_FAILURE(acpi_Disable(sc))) 2158 error = ENXIO; 2159 break; 2160 case ACPIIO_SETSLPSTATE: 2161 if (!sc->acpi_enabled) { 2162 error = ENXIO; 2163 break; 2164 } 2165 state = *(int *)addr; 2166 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 2167 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 2168 error = EINVAL; 2169 } else { 2170 error = EINVAL; 2171 } 2172 break; 2173 default: 2174 if (error == 0) 2175 error = EINVAL; 2176 break; 2177 } 2178 2179out: 2180 ACPI_UNLOCK; 2181 return (error); 2182} 2183 2184static int 2185acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2186{ 2187 char sleep_state[4]; 2188 char buf[16]; 2189 int error; 2190 UINT8 state, TypeA, TypeB; 2191 2192 buf[0] = '\0'; 2193 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX+1; state++) { 2194 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 2195 sprintf(sleep_state, "S%d ", state); 2196 strcat(buf, sleep_state); 2197 } 2198 } 2199 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 2200 return (error); 2201} 2202 2203static int 2204acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2205{ 2206 char sleep_state[10]; 2207 int error; 2208 u_int new_state, old_state; 2209 2210 old_state = *(u_int *)oidp->oid_arg1; 2211 if (old_state > ACPI_S_STATES_MAX+1) { 2212 strcpy(sleep_state, "unknown"); 2213 } else { 2214 bzero(sleep_state, sizeof(sleep_state)); 2215 strncpy(sleep_state, sleep_state_names[old_state], 2216 sizeof(sleep_state_names[old_state])); 2217 } 2218 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2219 if (error == 0 && req->newptr != NULL) { 2220 new_state = ACPI_STATE_S0; 2221 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) { 2222 if (strncmp(sleep_state, sleep_state_names[new_state], 2223 sizeof(sleep_state)) == 0) 2224 break; 2225 } 2226 if (new_state <= ACPI_S_STATES_MAX + 1) { 2227 if (new_state != old_state) 2228 *(u_int *)oidp->oid_arg1 = new_state; 2229 } else { 2230 error = EINVAL; 2231 } 2232 } 2233 2234 return (error); 2235} 2236 2237/* Inform devctl(4) when we receive a Notify. */ 2238void 2239acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2240{ 2241 char notify_buf[16]; 2242 ACPI_BUFFER handle_buf; 2243 ACPI_STATUS status; 2244 2245 if (subsystem == NULL) 2246 return; 2247 2248 handle_buf.Pointer = NULL; 2249 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2250 status = AcpiNsHandleToPathname(h, &handle_buf); 2251 if (ACPI_FAILURE(status)) 2252 return; 2253 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2254 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2255 AcpiOsFree(handle_buf.Pointer); 2256} 2257 2258#ifdef ACPI_DEBUG 2259/* 2260 * Support for parsing debug options from the kernel environment. 2261 * 2262 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2263 * by specifying the names of the bits in the debug.acpi.layer and 2264 * debug.acpi.level environment variables. Bits may be unset by 2265 * prefixing the bit name with !. 2266 */ 2267struct debugtag 2268{ 2269 char *name; 2270 UINT32 value; 2271}; 2272 2273static struct debugtag dbg_layer[] = { 2274 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2275 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2276 {"ACPI_EVENTS", ACPI_EVENTS}, 2277 {"ACPI_TABLES", ACPI_TABLES}, 2278 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2279 {"ACPI_PARSER", ACPI_PARSER}, 2280 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2281 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2282 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2283 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2284 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2285 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2286 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2287 2288 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2289 {"ACPI_BATTERY", ACPI_BATTERY}, 2290 {"ACPI_BUS", ACPI_BUS}, 2291 {"ACPI_BUTTON", ACPI_BUTTON}, 2292 {"ACPI_EC", ACPI_EC}, 2293 {"ACPI_FAN", ACPI_FAN}, 2294 {"ACPI_POWERRES", ACPI_POWERRES}, 2295 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2296 {"ACPI_THERMAL", ACPI_THERMAL}, 2297 {"ACPI_TIMER", ACPI_TIMER}, 2298 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2299 {NULL, 0} 2300}; 2301 2302static struct debugtag dbg_level[] = { 2303 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2304 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2305 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2306 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2307 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2308 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2309 2310 /* Trace verbosity level 1 [Standard Trace Level] */ 2311 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2312 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2313 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2314 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2315 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2316 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2317 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2318 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2319 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2320 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2321 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2322 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2323 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2324 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2325 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2326 2327 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2328 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2329 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2330 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2331 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2332 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2333 2334 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2335 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2336 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2337 {"ACPI_LV_IO", ACPI_LV_IO}, 2338 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2339 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2340 2341 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2342 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2343 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2344 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2345 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2346 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2347 {NULL, 0} 2348}; 2349 2350static void 2351acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2352{ 2353 char *ep; 2354 int i, l; 2355 int set; 2356 2357 while (*cp) { 2358 if (isspace(*cp)) { 2359 cp++; 2360 continue; 2361 } 2362 ep = cp; 2363 while (*ep && !isspace(*ep)) 2364 ep++; 2365 if (*cp == '!') { 2366 set = 0; 2367 cp++; 2368 if (cp == ep) 2369 continue; 2370 } else { 2371 set = 1; 2372 } 2373 l = ep - cp; 2374 for (i = 0; tag[i].name != NULL; i++) { 2375 if (!strncmp(cp, tag[i].name, l)) { 2376 if (set) 2377 *flag |= tag[i].value; 2378 else 2379 *flag &= ~tag[i].value; 2380 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 2381 } 2382 } 2383 cp = ep; 2384 } 2385} 2386 2387static void 2388acpi_set_debugging(void *junk) 2389{ 2390 char *cp; 2391 2392 if (cold) { 2393 AcpiDbgLayer = 0; 2394 AcpiDbgLevel = 0; 2395 } 2396 2397 if ((cp = getenv("debug.acpi.layer")) != NULL) { 2398 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 2399 freeenv(cp); 2400 } 2401 if ((cp = getenv("debug.acpi.level")) != NULL) { 2402 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 2403 freeenv(cp); 2404 } 2405 2406 if (cold) { 2407 printf("ACPI debug layer 0x%x debug level 0x%x\n", 2408 AcpiDbgLayer, AcpiDbgLevel); 2409 } 2410} 2411SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 2412 NULL); 2413 2414static int 2415acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 2416{ 2417 int error, *dbg; 2418 struct debugtag *tag; 2419 struct sbuf sb; 2420 2421 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 2422 return (ENOMEM); 2423 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 2424 tag = &dbg_layer[0]; 2425 dbg = &AcpiDbgLayer; 2426 } else { 2427 tag = &dbg_level[0]; 2428 dbg = &AcpiDbgLevel; 2429 } 2430 2431 /* Get old values if this is a get request. */ 2432 if (*dbg == 0) { 2433 sbuf_cpy(&sb, "NONE"); 2434 } else if (req->newptr == NULL) { 2435 for (; tag->name != NULL; tag++) { 2436 if ((*dbg & tag->value) == tag->value) 2437 sbuf_printf(&sb, "%s ", tag->name); 2438 } 2439 } 2440 sbuf_trim(&sb); 2441 sbuf_finish(&sb); 2442 2443 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2444 sbuf_delete(&sb); 2445 2446 /* If the user is setting a string, parse it. */ 2447 if (error == 0 && req->newptr != NULL) { 2448 *dbg = 0; 2449 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 2450 acpi_set_debugging(NULL); 2451 } 2452 2453 return (error); 2454} 2455SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 2456 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 2457SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 2458 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 2459#endif 2460 2461static int 2462acpi_pm_func(u_long cmd, void *arg, ...) 2463{ 2464 int state, acpi_state; 2465 int error; 2466 struct acpi_softc *sc; 2467 va_list ap; 2468 2469 error = 0; 2470 switch (cmd) { 2471 case POWER_CMD_SUSPEND: 2472 sc = (struct acpi_softc *)arg; 2473 if (sc == NULL) { 2474 error = EINVAL; 2475 goto out; 2476 } 2477 2478 va_start(ap, arg); 2479 state = va_arg(ap, int); 2480 va_end(ap); 2481 2482 switch (state) { 2483 case POWER_SLEEP_STATE_STANDBY: 2484 acpi_state = sc->acpi_standby_sx; 2485 break; 2486 case POWER_SLEEP_STATE_SUSPEND: 2487 acpi_state = sc->acpi_suspend_sx; 2488 break; 2489 case POWER_SLEEP_STATE_HIBERNATE: 2490 acpi_state = ACPI_STATE_S4; 2491 break; 2492 default: 2493 error = EINVAL; 2494 goto out; 2495 } 2496 2497 acpi_SetSleepState(sc, acpi_state); 2498 break; 2499 default: 2500 error = EINVAL; 2501 goto out; 2502 } 2503 2504out: 2505 return (error); 2506} 2507 2508static void 2509acpi_pm_register(void *arg) 2510{ 2511 if (!cold || resource_disabled("acpi", 0)) 2512 return; 2513 2514 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 2515} 2516 2517SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 2518