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/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/ioccom.h> 42 #include <sys/reboot.h> 43 #include <sys/sysctl.h> 44 #include <sys/ctype.h> 45 46 #include <machine/clock.h> 47 #include <machine/resource.h> 48 49 #include <isa/isavar.h> 50 51 #include "acpi.h" 52 53 #include <dev/acpica/acpivar.h> 54 #include <dev/acpica/acpiio.h> 55 56 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 57 58 /* 59 * Hooks for the ACPI CA debugging infrastructure 60 */ 61 #define _COMPONENT ACPI_BUS 62 MODULE_NAME("ACPI") 63 64 /* 65 * Character device 66 */ 67 68 static d_open_t acpiopen; 69 static d_close_t acpiclose; 70 static d_ioctl_t acpiioctl; 71 72 #define CDEV_MAJOR 152 73 static struct cdevsw acpi_cdevsw = { 74 acpiopen, 75 acpiclose, 76 noread, 77 nowrite, 78 acpiioctl, 79 nopoll, 80 nommap, 81 nostrategy, 82 "acpi", 83 CDEV_MAJOR, 84 nodump, 85 nopsize, 86 0 87 }; 88 89 static const char* sleep_state_names[] = { 90 "S0", "S1", "S2", "S3", "S4", "S5", "S4B" }; 91 92 /* this has to be static, as the softc is gone when we need it */ 93 static int acpi_off_state = ACPI_STATE_S5; 94 95 struct mtx acpi_mutex; 96 97 static int acpi_modevent(struct module *mod, int event, void *junk); 98 static void acpi_identify(driver_t *driver, device_t parent); 99 static int acpi_probe(device_t dev); 100 static int acpi_attach(device_t dev); 101 static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); 102 static int acpi_print_resources(struct resource_list *rl, const char *name, int type, 103 const char *format); 104 static int acpi_print_child(device_t bus, device_t child); 105 static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); 106 static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); 107 static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, 108 u_long count); 109 static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, 110 u_long *countp); 111 static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 112 u_long start, u_long end, u_long count, u_int flags); 113 static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); 114 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 115 116 static void acpi_probe_children(device_t bus); 117 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 118 119 static void acpi_shutdown_pre_sync(void *arg, int howto); 120 static void acpi_shutdown_final(void *arg, int howto); 121 122 static void acpi_enable_fixed_events(struct acpi_softc *sc); 123 124 static void acpi_system_eventhandler_sleep(void *arg, int state); 125 static void acpi_system_eventhandler_wakeup(void *arg, int state); 126 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 127 128 static device_method_t acpi_methods[] = { 129 /* Device interface */ 130 DEVMETHOD(device_identify, acpi_identify), 131 DEVMETHOD(device_probe, acpi_probe), 132 DEVMETHOD(device_attach, acpi_attach), 133 DEVMETHOD(device_shutdown, bus_generic_shutdown), 134 DEVMETHOD(device_suspend, bus_generic_suspend), 135 DEVMETHOD(device_resume, bus_generic_resume), 136 137 /* Bus interface */ 138 DEVMETHOD(bus_add_child, acpi_add_child), 139 DEVMETHOD(bus_print_child, acpi_print_child), 140 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 141 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 142 DEVMETHOD(bus_set_resource, acpi_set_resource), 143 DEVMETHOD(bus_get_resource, acpi_get_resource), 144 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 145 DEVMETHOD(bus_release_resource, acpi_release_resource), 146 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 147 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 148 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 149 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 150 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 151 152 /* ISA emulation */ 153 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 154 155 {0, 0} 156 }; 157 158 static driver_t acpi_driver = { 159 "acpi", 160 acpi_methods, 161 sizeof(struct acpi_softc), 162 }; 163 164 devclass_t acpi_devclass; 165 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 166 MODULE_VERSION(acpi, 100); 167 168 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 169 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 170 static int acpi_ca_version = ACPI_CA_VERSION; 171 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 172 173 /* 174 * ACPI can only be loaded as a module by the loader; activating it after 175 * system bootstrap time is not useful, and can be fatal to the system. 176 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 177 */ 178 static int 179 acpi_modevent(struct module *mod, int event, void *junk) 180 { 181 switch(event) { 182 case MOD_LOAD: 183 if (!cold) 184 return(EPERM); 185 break; 186 case MOD_UNLOAD: 187 return(EBUSY); 188 default: 189 break; 190 } 191 return(0); 192 } 193 194 /* 195 * Detect ACPI, perform early initialisation 196 */ 197 static void 198 acpi_identify(driver_t *driver, device_t parent) 199 { 200 device_t child; 201 int error; 202 #ifdef ENABLE_DEBUGGER 203 char *debugpoint = getenv("debug.acpi.debugger"); 204 #endif 205 206 FUNCTION_TRACE(__func__); 207 208 if(!cold){ 209 printf("Don't load this driver from userland!!\n"); 210 return ; 211 } 212 213 /* 214 * Make sure we're not being doubly invoked. 215 */ 216 if (device_find_child(parent, "acpi", 0) != NULL) 217 return_VOID; 218 219 /* initialise the ACPI mutex */ 220 mtx_init(&acpi_mutex, "ACPI global lock", MTX_DEF); 221 222 /* 223 * Start up the ACPI CA subsystem. 224 */ 225 #ifdef ENABLE_DEBUGGER 226 if (debugpoint && !strcmp(debugpoint, "init")) 227 acpi_EnterDebugger(); 228 #endif 229 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 230 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 231 return_VOID; 232 } 233 #ifdef ENABLE_DEBUGGER 234 if (debugpoint && !strcmp(debugpoint, "tables")) 235 acpi_EnterDebugger(); 236 #endif 237 if ((error = AcpiLoadTables()) != AE_OK) { 238 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 239 return_VOID; 240 } 241 242 /* 243 * Attach the actual ACPI device. 244 */ 245 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 246 device_printf(parent, "ACPI: could not attach\n"); 247 return_VOID; 248 } 249 } 250 251 /* 252 * Fetch some descriptive data from ACPI to put in our attach message 253 */ 254 static int 255 acpi_probe(device_t dev) 256 { 257 ACPI_TABLE_HEADER th; 258 char buf[20]; 259 ACPI_STATUS status; 260 int error; 261 262 FUNCTION_TRACE(__func__); 263 ACPI_LOCK; 264 265 if ((status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) { 266 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 267 error = ENXIO; 268 } else { 269 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 270 device_set_desc_copy(dev, buf); 271 error = 0; 272 } 273 ACPI_UNLOCK; 274 return_VALUE(error); 275 } 276 277 static int 278 acpi_attach(device_t dev) 279 { 280 struct acpi_softc *sc; 281 ACPI_STATUS status; 282 int error; 283 #ifdef ENABLE_DEBUGGER 284 char *debugpoint = getenv("debug.acpi.debugger"); 285 #endif 286 287 FUNCTION_TRACE(__func__); 288 ACPI_LOCK; 289 sc = device_get_softc(dev); 290 bzero(sc, sizeof(*sc)); 291 sc->acpi_dev = dev; 292 293 acpi_install_wakeup_handler(sc); 294 295 #ifdef ENABLE_DEBUGGER 296 if (debugpoint && !strcmp(debugpoint, "spaces")) 297 acpi_EnterDebugger(); 298 #endif 299 300 /* 301 * Install the default address space handlers. 302 */ 303 error = ENXIO; 304 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 305 ACPI_ADR_SPACE_SYSTEM_MEMORY, 306 ACPI_DEFAULT_HANDLER, 307 NULL, NULL)) != AE_OK) { 308 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 309 goto out; 310 } 311 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 312 ACPI_ADR_SPACE_SYSTEM_IO, 313 ACPI_DEFAULT_HANDLER, 314 NULL, NULL)) != AE_OK) { 315 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 316 goto out; 317 } 318 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 319 ACPI_ADR_SPACE_PCI_CONFIG, 320 ACPI_DEFAULT_HANDLER, 321 NULL, NULL)) != AE_OK) { 322 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 323 goto out; 324 } 325 326 /* 327 * Bring ACPI fully online. 328 * 329 * Note that we request that device _STA and _INI methods not be run (ACPI_NO_DEVICE_INIT) 330 * and the final object initialisation pass be skipped (ACPI_NO_OBJECT_INIT). 331 * 332 * XXX We need to arrange for the object init pass after we have attached all our 333 * child devices. 334 */ 335 #ifdef ENABLE_DEBUGGER 336 if (debugpoint && !strcmp(debugpoint, "enable")) 337 acpi_EnterDebugger(); 338 #endif 339 if ((status = AcpiEnableSubsystem(ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT)) != AE_OK) { 340 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 341 goto out; 342 } 343 344 /* 345 * Setup our sysctl tree. 346 * 347 * XXX: This doesn't check to make sure that none of these fail. 348 */ 349 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 350 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 351 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 352 device_get_name(dev), CTLFLAG_RD, 0, ""); 353 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 354 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 355 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 356 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 357 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 358 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 359 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 360 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 361 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 362 363 /* 364 * Dispatch the default sleep state to devices. 365 * TBD: should be configured from userland policy manager. 366 */ 367 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 368 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 369 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 370 371 acpi_enable_fixed_events(sc); 372 373 /* 374 * Scan the namespace and attach/initialise children. 375 */ 376 #ifdef ENABLE_DEBUGGER 377 if (debugpoint && !strcmp(debugpoint, "probe")) 378 acpi_EnterDebugger(); 379 #endif 380 if (!acpi_disabled("bus")) 381 acpi_probe_children(dev); 382 383 /* 384 * Register our shutdown handlers 385 */ 386 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 387 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 388 389 /* 390 * Register our acpi event handlers. 391 * XXX should be configurable eg. via userland policy manager. 392 */ 393 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 394 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 395 396 /* 397 * Flag our initial states. 398 */ 399 sc->acpi_enabled = 1; 400 sc->acpi_sstate = ACPI_STATE_S0; 401 402 /* 403 * Create the control device 404 */ 405 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 406 sc->acpi_dev_t->si_drv1 = sc; 407 408 #ifdef ENABLE_DEBUGGER 409 if (debugpoint && !strcmp(debugpoint, "running")) 410 acpi_EnterDebugger(); 411 #endif 412 error = 0; 413 414 out: 415 ACPI_UNLOCK; 416 return_VALUE(error); 417 } 418 419 /* 420 * Handle a new device being added 421 */ 422 static device_t 423 acpi_add_child(device_t bus, int order, const char *name, int unit) 424 { 425 struct acpi_device *ad; 426 device_t child; 427 428 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 429 return(NULL); 430 bzero(ad, sizeof(*ad)); 431 432 resource_list_init(&ad->ad_rl); 433 434 child = device_add_child_ordered(bus, order, name, unit); 435 if (child != NULL) 436 device_set_ivars(child, ad); 437 return(child); 438 } 439 440 /* 441 * Print child device resource usage 442 */ 443 static int 444 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 445 { 446 struct resource_list_entry *rle; 447 int printed, retval; 448 449 printed = 0; 450 retval = 0; 451 452 if (!SLIST_FIRST(rl)) 453 return(0); 454 455 /* Yes, this is kinda cheating */ 456 SLIST_FOREACH(rle, rl, link) { 457 if (rle->type == type) { 458 if (printed == 0) 459 retval += printf(" %s ", name); 460 else if (printed > 0) 461 retval += printf(","); 462 printed++; 463 retval += printf(format, rle->start); 464 if (rle->count > 1) { 465 retval += printf("-"); 466 retval += printf(format, rle->start + 467 rle->count - 1); 468 } 469 } 470 } 471 return(retval); 472 } 473 474 static int 475 acpi_print_child(device_t bus, device_t child) 476 { 477 struct acpi_device *adev = device_get_ivars(child); 478 struct resource_list *rl = &adev->ad_rl; 479 int retval = 0; 480 481 retval += bus_print_child_header(bus, child); 482 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 483 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 484 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 485 retval += bus_print_child_footer(bus, child); 486 487 return(retval); 488 } 489 490 491 /* 492 * Handle per-device ivars 493 */ 494 static int 495 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 496 { 497 struct acpi_device *ad; 498 499 if ((ad = device_get_ivars(child)) == NULL) { 500 printf("device has no ivars\n"); 501 return(ENOENT); 502 } 503 504 switch(index) { 505 /* ACPI ivars */ 506 case ACPI_IVAR_HANDLE: 507 *(ACPI_HANDLE *)result = ad->ad_handle; 508 break; 509 case ACPI_IVAR_MAGIC: 510 *(int *)result = ad->ad_magic; 511 break; 512 case ACPI_IVAR_PRIVATE: 513 *(void **)result = ad->ad_private; 514 break; 515 516 default: 517 panic("bad ivar read request (%d)\n", index); 518 return(ENOENT); 519 } 520 return(0); 521 } 522 523 static int 524 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 525 { 526 struct acpi_device *ad; 527 528 if ((ad = device_get_ivars(child)) == NULL) { 529 printf("device has no ivars\n"); 530 return(ENOENT); 531 } 532 533 switch(index) { 534 /* ACPI ivars */ 535 case ACPI_IVAR_HANDLE: 536 ad->ad_handle = (ACPI_HANDLE)value; 537 break; 538 case ACPI_IVAR_MAGIC: 539 ad->ad_magic = (int )value; 540 break; 541 case ACPI_IVAR_PRIVATE: 542 ad->ad_private = (void *)value; 543 break; 544 545 default: 546 panic("bad ivar write request (%d)\n", index); 547 return(ENOENT); 548 } 549 return(0); 550 } 551 552 /* 553 * Handle child resource allocation/removal 554 */ 555 static int 556 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 557 { 558 struct acpi_device *ad = device_get_ivars(child); 559 struct resource_list *rl = &ad->ad_rl; 560 561 resource_list_add(rl, type, rid, start, start + count -1, count); 562 563 return(0); 564 } 565 566 static int 567 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 568 { 569 struct acpi_device *ad = device_get_ivars(child); 570 struct resource_list *rl = &ad->ad_rl; 571 struct resource_list_entry *rle; 572 573 rle = resource_list_find(rl, type, rid); 574 if (!rle) 575 return(ENOENT); 576 577 if (startp) 578 *startp = rle->start; 579 if (countp) 580 *countp = rle->count; 581 582 return(0); 583 } 584 585 static struct resource * 586 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 587 u_long start, u_long end, u_long count, u_int flags) 588 { 589 struct acpi_device *ad = device_get_ivars(child); 590 struct resource_list *rl = &ad->ad_rl; 591 592 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 593 } 594 595 static int 596 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 597 { 598 struct acpi_device *ad = device_get_ivars(child); 599 struct resource_list *rl = &ad->ad_rl; 600 601 return(resource_list_release(rl, bus, child, type, rid, r)); 602 } 603 604 /* 605 * Handle ISA-like devices probing for a PnP ID to match. 606 */ 607 #define PNP_EISAID(s) \ 608 ((((s[0] - '@') & 0x1f) << 2) \ 609 | (((s[1] - '@') & 0x18) >> 3) \ 610 | (((s[1] - '@') & 0x07) << 13) \ 611 | (((s[2] - '@') & 0x1f) << 8) \ 612 | (PNP_HEXTONUM(s[4]) << 16) \ 613 | (PNP_HEXTONUM(s[3]) << 20) \ 614 | (PNP_HEXTONUM(s[6]) << 24) \ 615 | (PNP_HEXTONUM(s[5]) << 28)) 616 617 int 618 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 619 { 620 ACPI_HANDLE h; 621 ACPI_DEVICE_INFO devinfo; 622 ACPI_STATUS error; 623 u_int32_t pnpid; 624 int result; 625 626 FUNCTION_TRACE(__func__); 627 628 /* 629 * ISA-style drivers attached to ACPI may persist and 630 * probe manually if we return ENOENT. We never want 631 * that to happen, so don't ever return it. 632 */ 633 result = ENXIO; 634 ACPI_LOCK; 635 636 /* fetch and validate the HID */ 637 if ((h = acpi_get_handle(child)) == NULL) 638 goto out; 639 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 640 goto out; 641 if (!(devinfo.Valid & ACPI_VALID_HID)) 642 goto out; 643 644 /* scan the supplied IDs for a match */ 645 pnpid = PNP_EISAID(devinfo.HardwareId); 646 while (ids && ids->ip_id) { 647 if (pnpid == ids->ip_id) { 648 result = 0; 649 goto out; 650 } 651 ids++; 652 } 653 out: 654 ACPI_UNLOCK; 655 return_VALUE(result); 656 } 657 658 /* 659 * Scan relevant portions of the ACPI namespace and attach child devices. 660 * 661 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 662 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 663 */ 664 static void 665 acpi_probe_children(device_t bus) 666 { 667 ACPI_HANDLE parent; 668 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 669 int i; 670 671 FUNCTION_TRACE(__func__); 672 ACPI_ASSERTLOCK; 673 674 /* 675 * Create any static children by calling device identify methods. 676 */ 677 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 678 bus_generic_probe(bus); 679 680 /* 681 * Scan the namespace and insert placeholders for all the devices that 682 * we find. 683 * 684 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 685 * we want to create nodes for all devices, not just those that are currently 686 * present. (This assumes that we don't want to create/remove devices as they 687 * appear, which might be smarter.) 688 */ 689 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 690 for (i = 0; scopes[i] != NULL; i++) 691 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 692 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 693 694 /* 695 * Scan all of the child devices we have created and let them probe/attach. 696 */ 697 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 698 bus_generic_attach(bus); 699 700 /* 701 * Some of these children may have attached others as part of their attach 702 * process (eg. the root PCI bus driver), so rescan. 703 */ 704 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 705 bus_generic_attach(bus); 706 707 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 708 return_VOID; 709 } 710 711 /* 712 * Evaluate a child device and determine whether we might attach a device to 713 * it. 714 */ 715 static ACPI_STATUS 716 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 717 { 718 ACPI_OBJECT_TYPE type; 719 device_t child, bus = (device_t)context; 720 721 FUNCTION_TRACE(__func__); 722 723 /* 724 * Skip this device if we think we'll have trouble with it. 725 */ 726 if (acpi_avoid(handle)) 727 return_ACPI_STATUS(AE_OK); 728 729 if (AcpiGetType(handle, &type) == AE_OK) { 730 switch(type) { 731 case ACPI_TYPE_DEVICE: 732 case ACPI_TYPE_PROCESSOR: 733 case ACPI_TYPE_THERMAL: 734 case ACPI_TYPE_POWER: 735 if (acpi_disabled("children")) 736 break; 737 /* 738 * Create a placeholder device for this node. Sort the placeholder 739 * so that the probe/attach passes will run breadth-first. 740 */ 741 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 742 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 743 if (child == NULL) 744 break; 745 acpi_set_handle(child, handle); 746 747 /* 748 * Get the device's resource settings and attach them. 749 * Note that if the device has _PRS but no _CRS, we need 750 * to decide when it's appropriate to try to configure the 751 * device. Ignore the return value here; it's OK for the 752 * device not to have any resources. 753 */ 754 acpi_parse_resources(child, handle, &acpi_res_parse_set); 755 756 /* if we're debugging, probe/attach now rather than later */ 757 DEBUG_EXEC(device_probe_and_attach(child)); 758 break; 759 } 760 } 761 return_ACPI_STATUS(AE_OK); 762 } 763 764 static void 765 acpi_shutdown_pre_sync(void *arg, int howto) 766 { 767 768 ACPI_ASSERTLOCK; 769 770 /* 771 * Disable all ACPI events before soft off, otherwise the system 772 * will be turned on again on some laptops. 773 * 774 * XXX this should probably be restricted to masking some events just 775 * before powering down, since we may still need ACPI during the 776 * shutdown process. 777 */ 778 acpi_Disable((struct acpi_softc *)arg); 779 } 780 781 static void 782 acpi_shutdown_final(void *arg, int howto) 783 { 784 ACPI_STATUS status; 785 786 ACPI_ASSERTLOCK; 787 788 if (howto & RB_POWEROFF) { 789 printf("Power system off using ACPI...\n"); 790 if ((status = AcpiEnterSleepState(acpi_off_state)) != AE_OK) { 791 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 792 } else { 793 DELAY(1000000); 794 printf("ACPI power-off failed - timeout\n"); 795 } 796 } 797 } 798 799 static void 800 acpi_enable_fixed_events(struct acpi_softc *sc) 801 { 802 static int first_time = 1; 803 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 804 805 ACPI_ASSERTLOCK; 806 807 /* Enable and clear fixed events and install handlers. */ 808 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 809 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 810 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 811 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 812 acpi_eventhandler_power_button_for_sleep, sc); 813 if (first_time) { 814 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 815 } 816 } 817 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 818 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 819 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 820 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 821 acpi_eventhandler_sleep_button_for_sleep, sc); 822 if (first_time) { 823 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 824 } 825 } 826 827 first_time = 0; 828 } 829 830 /* 831 * Returns true if the device is actually present and should 832 * be attached to. This requires the present, enabled, UI-visible 833 * and diagnostics-passed bits to be set. 834 */ 835 BOOLEAN 836 acpi_DeviceIsPresent(device_t dev) 837 { 838 ACPI_HANDLE h; 839 ACPI_DEVICE_INFO devinfo; 840 ACPI_STATUS error; 841 842 ACPI_ASSERTLOCK; 843 844 if ((h = acpi_get_handle(dev)) == NULL) 845 return(FALSE); 846 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 847 return(FALSE); 848 /* XXX 0xf is probably not appropriate */ 849 if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) 850 return(TRUE); 851 return(FALSE); 852 } 853 854 /* 855 * Match a HID string against a device 856 */ 857 BOOLEAN 858 acpi_MatchHid(device_t dev, char *hid) 859 { 860 ACPI_HANDLE h; 861 ACPI_DEVICE_INFO devinfo; 862 ACPI_STATUS error; 863 864 ACPI_ASSERTLOCK; 865 866 if (hid == NULL) 867 return(FALSE); 868 if ((h = acpi_get_handle(dev)) == NULL) 869 return(FALSE); 870 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 871 return(FALSE); 872 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 873 return(TRUE); 874 return(FALSE); 875 } 876 877 /* 878 * Return the handle of a named object within our scope, ie. that of (parent) 879 * or one if its parents. 880 */ 881 ACPI_STATUS 882 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 883 { 884 ACPI_HANDLE r; 885 ACPI_STATUS status; 886 887 ACPI_ASSERTLOCK; 888 889 /* walk back up the tree to the root */ 890 for (;;) { 891 status = AcpiGetHandle(parent, path, &r); 892 if (status == AE_OK) { 893 *result = r; 894 return(AE_OK); 895 } 896 if (status != AE_NOT_FOUND) 897 return(AE_OK); 898 if (AcpiGetParent(parent, &r) != AE_OK) 899 return(AE_NOT_FOUND); 900 parent = r; 901 } 902 } 903 904 /* 905 * Allocate a buffer with a preset data size. 906 */ 907 ACPI_BUFFER * 908 acpi_AllocBuffer(int size) 909 { 910 ACPI_BUFFER *buf; 911 912 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 913 return(NULL); 914 buf->Length = size; 915 buf->Pointer = (void *)(buf + 1); 916 return(buf); 917 } 918 919 /* 920 * Perform the tedious double-get procedure required for fetching something into 921 * an ACPI_BUFFER that has not been initialised. 922 */ 923 ACPI_STATUS 924 acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 925 { 926 ACPI_STATUS status; 927 928 ACPI_ASSERTLOCK; 929 930 buf->Length = 0; 931 buf->Pointer = NULL; 932 933 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 934 return(status); 935 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 936 return(AE_NO_MEMORY); 937 return(func(handle, buf)); 938 } 939 940 /* 941 * Perform the tedious double-get procedure required for fetching a table into 942 * an ACPI_BUFFER that has not been initialised. 943 */ 944 ACPI_STATUS 945 acpi_GetTableIntoBuffer(ACPI_TABLE_TYPE table, UINT32 instance, ACPI_BUFFER *buf) 946 { 947 ACPI_STATUS status; 948 949 ACPI_ASSERTLOCK; 950 951 buf->Length = 0; 952 buf->Pointer = NULL; 953 954 if ((status = AcpiGetTable(table, instance, buf)) != AE_BUFFER_OVERFLOW) 955 return(status); 956 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 957 return(AE_NO_MEMORY); 958 return(AcpiGetTable(table, instance, buf)); 959 } 960 961 /* 962 * Perform the tedious double-evaluate procedure for evaluating something into 963 * an ACPI_BUFFER that has not been initialised. Note that this evaluates 964 * twice, so avoid applying this to things that may have side-effects. 965 * 966 * This is like AcpiEvaluateObject with automatic buffer allocation. 967 */ 968 ACPI_STATUS 969 acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname, ACPI_OBJECT_LIST *params, 970 ACPI_BUFFER *buf) 971 { 972 ACPI_STATUS status; 973 974 ACPI_ASSERTLOCK; 975 976 buf->Length = 0; 977 buf->Pointer = NULL; 978 979 if ((status = AcpiEvaluateObject(object, pathname, params, buf)) != AE_BUFFER_OVERFLOW) 980 return(status); 981 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 982 return(AE_NO_MEMORY); 983 return(AcpiEvaluateObject(object, pathname, params, buf)); 984 } 985 986 /* 987 * Evaluate a path that should return an integer. 988 */ 989 ACPI_STATUS 990 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 991 { 992 ACPI_STATUS error; 993 ACPI_BUFFER buf; 994 ACPI_OBJECT param; 995 996 ACPI_ASSERTLOCK; 997 998 if (handle == NULL) 999 handle = ACPI_ROOT_OBJECT; 1000 buf.Pointer = ¶m; 1001 buf.Length = sizeof(param); 1002 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1003 if (param.Type == ACPI_TYPE_INTEGER) { 1004 *number = param.Integer.Value; 1005 } else { 1006 error = AE_TYPE; 1007 } 1008 } 1009 return(error); 1010 } 1011 1012 /* 1013 * Iterate over the elements of an a package object, calling the supplied 1014 * function for each element. 1015 * 1016 * XXX possible enhancement might be to abort traversal on error. 1017 */ 1018 ACPI_STATUS 1019 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1020 { 1021 ACPI_OBJECT *comp; 1022 int i; 1023 1024 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1025 return(AE_BAD_PARAMETER); 1026 1027 /* iterate over components */ 1028 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1029 func(comp, arg); 1030 1031 return(AE_OK); 1032 } 1033 1034 /* 1035 * Find the (index)th resource object in a set. 1036 */ 1037 ACPI_STATUS 1038 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1039 { 1040 ACPI_RESOURCE *rp; 1041 int i; 1042 1043 rp = (ACPI_RESOURCE *)buf->Pointer; 1044 i = index; 1045 while (i-- > 0) { 1046 /* range check */ 1047 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1048 return(AE_BAD_PARAMETER); 1049 /* check for terminator */ 1050 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1051 (rp->Length == 0)) 1052 return(AE_NOT_FOUND); 1053 rp = ACPI_RESOURCE_NEXT(rp); 1054 } 1055 if (resp != NULL) 1056 *resp = rp; 1057 return(AE_OK); 1058 } 1059 1060 /* 1061 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1062 * 1063 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1064 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1065 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1066 * resources. 1067 */ 1068 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1069 1070 ACPI_STATUS 1071 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1072 { 1073 ACPI_RESOURCE *rp; 1074 void *newp; 1075 1076 /* 1077 * Initialise the buffer if necessary. 1078 */ 1079 if (buf->Pointer == NULL) { 1080 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1081 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1082 return(AE_NO_MEMORY); 1083 rp = (ACPI_RESOURCE *)buf->Pointer; 1084 rp->Id = ACPI_RSTYPE_END_TAG; 1085 rp->Length = 0; 1086 } 1087 if (res == NULL) 1088 return(AE_OK); 1089 1090 /* 1091 * Scan the current buffer looking for the terminator. 1092 * This will either find the terminator or hit the end 1093 * of the buffer and return an error. 1094 */ 1095 rp = (ACPI_RESOURCE *)buf->Pointer; 1096 for (;;) { 1097 /* range check, don't go outside the buffer */ 1098 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1099 return(AE_BAD_PARAMETER); 1100 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1101 (rp->Length == 0)) { 1102 break; 1103 } 1104 rp = ACPI_RESOURCE_NEXT(rp); 1105 } 1106 1107 /* 1108 * Check the size of the buffer and expand if required. 1109 * 1110 * Required size is: 1111 * size of existing resources before terminator + 1112 * size of new resource and header + 1113 * size of terminator. 1114 * 1115 * Note that this loop should really only run once, unless 1116 * for some reason we are stuffing a *really* huge resource. 1117 */ 1118 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1119 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1120 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1121 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1122 return(AE_NO_MEMORY); 1123 bcopy(buf->Pointer, newp, buf->Length); 1124 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1125 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1126 AcpiOsFree(buf->Pointer); 1127 buf->Pointer = newp; 1128 buf->Length += buf->Length; 1129 } 1130 1131 /* 1132 * Insert the new resource. 1133 */ 1134 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1135 1136 /* 1137 * And add the terminator. 1138 */ 1139 rp = ACPI_RESOURCE_NEXT(rp); 1140 rp->Id = ACPI_RSTYPE_END_TAG; 1141 rp->Length = 0; 1142 1143 return(AE_OK); 1144 } 1145 1146 1147 /* 1148 * Set the system sleep state 1149 * 1150 * Currently we only support S1 and S5 1151 */ 1152 ACPI_STATUS 1153 acpi_SetSleepState(struct acpi_softc *sc, int state) 1154 { 1155 ACPI_STATUS status = AE_OK; 1156 UINT16 Count; 1157 UINT8 TypeA; 1158 UINT8 TypeB; 1159 1160 FUNCTION_TRACE_U32(__func__, state); 1161 ACPI_ASSERTLOCK; 1162 1163 switch (state) { 1164 case ACPI_STATE_S0: /* XXX only for testing */ 1165 status = AcpiEnterSleepState((UINT8)state); 1166 if (status != AE_OK) { 1167 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1168 } 1169 break; 1170 1171 case ACPI_STATE_S1: 1172 case ACPI_STATE_S2: 1173 case ACPI_STATE_S3: 1174 case ACPI_STATE_S4: 1175 status = AcpiHwObtainSleepTypeRegisterData((UINT8)state, &TypeA, &TypeB); 1176 if (status != AE_OK) { 1177 device_printf(sc->acpi_dev, "AcpiHwObtainSleepTypeRegisterData failed - %s\n", AcpiFormatException(status)); 1178 break; 1179 } 1180 1181 /* 1182 * Inform all devices that we are going to sleep. 1183 */ 1184 if (DEVICE_SUSPEND(root_bus) != 0) { 1185 /* 1186 * Re-wake the system. 1187 * 1188 * XXX note that a better two-pass approach with a 'veto' pass 1189 * followed by a "real thing" pass would be better, but the 1190 * current bus interface does not provide for this. 1191 */ 1192 DEVICE_RESUME(root_bus); 1193 return_ACPI_STATUS(AE_ERROR); 1194 } 1195 sc->acpi_sstate = state; 1196 1197 if (state != ACPI_STATE_S1) { 1198 acpi_sleep_machdep(sc, state); 1199 1200 /* AcpiEnterSleepState() maybe incompleted, unlock here. */ 1201 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1202 1203 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1204 if (state >= ACPI_STATE_S4) { 1205 acpi_Disable(sc); 1206 acpi_Enable(sc); 1207 } 1208 } else { 1209 status = AcpiEnterSleepState((UINT8)state); 1210 if (status != AE_OK) { 1211 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1212 break; 1213 } 1214 /* wait for the WAK_STS bit */ 1215 Count = 0; 1216 while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) { 1217 AcpiOsSleep(0, 1); 1218 /* 1219 * Some BIOSes don't set WAK_STS at all, 1220 * give up waiting for wakeup if we time out. 1221 */ 1222 if (Count > 1000) { 1223 break; /* giving up */ 1224 } 1225 Count++; 1226 } 1227 } 1228 AcpiLeaveSleepState((UINT8)state); 1229 DEVICE_RESUME(root_bus); 1230 sc->acpi_sstate = ACPI_STATE_S0; 1231 acpi_enable_fixed_events(sc); 1232 break; 1233 1234 case ACPI_STATE_S5: 1235 /* 1236 * Shut down cleanly and power off. This will call us back through the 1237 * shutdown handlers. 1238 */ 1239 shutdown_nice(RB_POWEROFF); 1240 break; 1241 1242 default: 1243 status = AE_BAD_PARAMETER; 1244 break; 1245 } 1246 return_ACPI_STATUS(status); 1247 } 1248 1249 /* 1250 * Enable/Disable ACPI 1251 */ 1252 ACPI_STATUS 1253 acpi_Enable(struct acpi_softc *sc) 1254 { 1255 ACPI_STATUS status; 1256 u_int32_t flags; 1257 1258 FUNCTION_TRACE(__func__); 1259 ACPI_ASSERTLOCK; 1260 1261 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1262 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1263 if (!sc->acpi_enabled) { 1264 status = AcpiEnableSubsystem(flags); 1265 } else { 1266 status = AE_OK; 1267 } 1268 if (status == AE_OK) 1269 sc->acpi_enabled = 1; 1270 return_ACPI_STATUS(status); 1271 } 1272 1273 ACPI_STATUS 1274 acpi_Disable(struct acpi_softc *sc) 1275 { 1276 ACPI_STATUS status; 1277 1278 FUNCTION_TRACE(__func__); 1279 ACPI_ASSERTLOCK; 1280 1281 if (sc->acpi_enabled) { 1282 status = AcpiDisable(); 1283 } else { 1284 status = AE_OK; 1285 } 1286 if (status == AE_OK) 1287 sc->acpi_enabled = 0; 1288 return_ACPI_STATUS(status); 1289 } 1290 1291 /* 1292 * ACPI Event Handlers 1293 */ 1294 1295 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1296 1297 static void 1298 acpi_system_eventhandler_sleep(void *arg, int state) 1299 { 1300 FUNCTION_TRACE_U32(__func__, state); 1301 1302 ACPI_LOCK; 1303 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1304 acpi_SetSleepState((struct acpi_softc *)arg, state); 1305 ACPI_UNLOCK; 1306 return_VOID; 1307 } 1308 1309 static void 1310 acpi_system_eventhandler_wakeup(void *arg, int state) 1311 { 1312 FUNCTION_TRACE_U32(__func__, state); 1313 1314 /* Well, what to do? :-) */ 1315 1316 ACPI_LOCK; 1317 ACPI_UNLOCK; 1318 1319 return_VOID; 1320 } 1321 1322 /* 1323 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1324 */ 1325 UINT32 1326 acpi_eventhandler_power_button_for_sleep(void *context) 1327 { 1328 struct acpi_softc *sc = (struct acpi_softc *)context; 1329 1330 FUNCTION_TRACE(__func__); 1331 1332 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1333 1334 return_VALUE(INTERRUPT_HANDLED); 1335 } 1336 1337 UINT32 1338 acpi_eventhandler_power_button_for_wakeup(void *context) 1339 { 1340 struct acpi_softc *sc = (struct acpi_softc *)context; 1341 1342 FUNCTION_TRACE(__func__); 1343 1344 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1345 1346 return_VALUE(INTERRUPT_HANDLED); 1347 } 1348 1349 UINT32 1350 acpi_eventhandler_sleep_button_for_sleep(void *context) 1351 { 1352 struct acpi_softc *sc = (struct acpi_softc *)context; 1353 1354 FUNCTION_TRACE(__func__); 1355 1356 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1357 1358 return_VALUE(INTERRUPT_HANDLED); 1359 } 1360 1361 UINT32 1362 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1363 { 1364 struct acpi_softc *sc = (struct acpi_softc *)context; 1365 1366 FUNCTION_TRACE(__func__); 1367 1368 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1369 1370 return_VALUE(INTERRUPT_HANDLED); 1371 } 1372 1373 /* 1374 * XXX This is kinda ugly, and should not be here. 1375 */ 1376 struct acpi_staticbuf { 1377 ACPI_BUFFER buffer; 1378 char data[512]; 1379 }; 1380 1381 char * 1382 acpi_name(ACPI_HANDLE handle) 1383 { 1384 static struct acpi_staticbuf buf; 1385 1386 ACPI_ASSERTLOCK; 1387 1388 buf.buffer.Length = 512; 1389 buf.buffer.Pointer = &buf.data[0]; 1390 1391 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 1392 return(buf.buffer.Pointer); 1393 return("(unknown path)"); 1394 } 1395 1396 /* 1397 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1398 * parts of the namespace. 1399 */ 1400 int 1401 acpi_avoid(ACPI_HANDLE handle) 1402 { 1403 char *cp, *np; 1404 int len; 1405 1406 np = acpi_name(handle); 1407 if (*np == '\\') 1408 np++; 1409 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1410 return(0); 1411 1412 /* scan the avoid list checking for a match */ 1413 for (;;) { 1414 while ((*cp != 0) && isspace(*cp)) 1415 cp++; 1416 if (*cp == 0) 1417 break; 1418 len = 0; 1419 while ((cp[len] != 0) && !isspace(cp[len])) 1420 len++; 1421 if (!strncmp(cp, np, len)) 1422 return(1); 1423 cp += len; 1424 } 1425 return(0); 1426 } 1427 1428 /* 1429 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1430 */ 1431 int 1432 acpi_disabled(char *subsys) 1433 { 1434 char *cp; 1435 int len; 1436 1437 if ((cp = getenv("debug.acpi.disable")) == NULL) 1438 return(0); 1439 if (!strcmp(cp, "all")) 1440 return(1); 1441 1442 /* scan the disable list checking for a match */ 1443 for (;;) { 1444 while ((*cp != 0) && isspace(*cp)) 1445 cp++; 1446 if (*cp == 0) 1447 break; 1448 len = 0; 1449 while ((cp[len] != 0) && !isspace(cp[len])) 1450 len++; 1451 if (!strncmp(cp, subsys, len)) 1452 return(1); 1453 cp += len; 1454 } 1455 return(0); 1456 } 1457 1458 /* 1459 * Control interface. 1460 * 1461 * We multiplex ioctls for all participating ACPI devices here. Individual 1462 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1463 * interface to make their handlers visible. 1464 */ 1465 struct acpi_ioctl_hook 1466 { 1467 TAILQ_ENTRY(acpi_ioctl_hook) link; 1468 u_long cmd; 1469 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1470 void *arg; 1471 }; 1472 1473 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1474 static int acpi_ioctl_hooks_initted; 1475 1476 /* 1477 * Register an ioctl handler. 1478 */ 1479 int 1480 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1481 { 1482 struct acpi_ioctl_hook *hp; 1483 1484 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1485 return(ENOMEM); 1486 hp->cmd = cmd; 1487 hp->fn = fn; 1488 hp->arg = arg; 1489 if (acpi_ioctl_hooks_initted == 0) { 1490 TAILQ_INIT(&acpi_ioctl_hooks); 1491 acpi_ioctl_hooks_initted = 1; 1492 } 1493 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1494 return(0); 1495 } 1496 1497 /* 1498 * Deregister an ioctl handler. 1499 */ 1500 void 1501 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1502 { 1503 struct acpi_ioctl_hook *hp; 1504 1505 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1506 if ((hp->cmd == cmd) && (hp->fn == fn)) 1507 break; 1508 1509 if (hp != NULL) { 1510 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1511 free(hp, M_ACPIDEV); 1512 } 1513 } 1514 1515 static int 1516 acpiopen(dev_t dev, int flag, int fmt, struct proc *p) 1517 { 1518 return(0); 1519 } 1520 1521 static int 1522 acpiclose(dev_t dev, int flag, int fmt, struct proc *p) 1523 { 1524 return(0); 1525 } 1526 1527 static int 1528 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1529 { 1530 struct acpi_softc *sc; 1531 struct acpi_ioctl_hook *hp; 1532 int error, xerror, state; 1533 1534 ACPI_LOCK; 1535 1536 error = state = 0; 1537 sc = dev->si_drv1; 1538 1539 /* 1540 * Scan the list of registered ioctls, looking for handlers. 1541 */ 1542 if (acpi_ioctl_hooks_initted) { 1543 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1544 if (hp->cmd == cmd) { 1545 xerror = hp->fn(cmd, addr, hp->arg); 1546 if (xerror != 0) 1547 error = xerror; 1548 goto out; 1549 } 1550 } 1551 } 1552 1553 /* 1554 * Core system ioctls. 1555 */ 1556 switch (cmd) { 1557 case ACPIIO_ENABLE: 1558 if (ACPI_FAILURE(acpi_Enable(sc))) 1559 error = ENXIO; 1560 break; 1561 1562 case ACPIIO_DISABLE: 1563 if (ACPI_FAILURE(acpi_Disable(sc))) 1564 error = ENXIO; 1565 break; 1566 1567 case ACPIIO_SETSLPSTATE: 1568 if (!sc->acpi_enabled) { 1569 error = ENXIO; 1570 break; 1571 } 1572 state = *(int *)addr; 1573 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1574 acpi_SetSleepState(sc, state); 1575 } else { 1576 error = EINVAL; 1577 } 1578 break; 1579 1580 default: 1581 if (error == 0) 1582 error = EINVAL; 1583 break; 1584 } 1585 1586 out: 1587 ACPI_UNLOCK; 1588 return(error); 1589 } 1590 1591 static int 1592 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1593 { 1594 char sleep_state[10]; 1595 int error; 1596 u_int new_state, old_state; 1597 1598 old_state = *(u_int *)oidp->oid_arg1; 1599 if (old_state > ACPI_S_STATES_MAX) { 1600 strcpy(sleep_state, "unknown"); 1601 } else { 1602 strncpy(sleep_state, sleep_state_names[old_state], 1603 sizeof(sleep_state_names[old_state])); 1604 } 1605 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1606 if (error == 0 && req->newptr != NULL) { 1607 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX; new_state++) { 1608 if (strncmp(sleep_state, sleep_state_names[new_state], 1609 sizeof(sleep_state)) == 0) 1610 break; 1611 } 1612 if ((new_state != old_state) && (new_state <= ACPI_S_STATES_MAX)) { 1613 *(u_int *)oidp->oid_arg1 = new_state; 1614 } else { 1615 error = EINVAL; 1616 } 1617 } 1618 return(error); 1619 } 1620 1621 #ifdef ACPI_DEBUG 1622 /* 1623 * Support for parsing debug options from the kernel environment. 1624 * 1625 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1626 * by specifying the names of the bits in the debug.acpi.layer and 1627 * debug.acpi.level environment variables. Bits may be unset by 1628 * prefixing the bit name with !. 1629 */ 1630 struct debugtag 1631 { 1632 char *name; 1633 UINT32 value; 1634 }; 1635 1636 static struct debugtag dbg_layer[] = { 1637 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1638 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1639 {"ACPI_EVENTS", ACPI_EVENTS}, 1640 {"ACPI_TABLES", ACPI_TABLES}, 1641 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 1642 {"ACPI_PARSER", ACPI_PARSER}, 1643 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 1644 {"ACPI_EXECUTER", ACPI_EXECUTER}, 1645 {"ACPI_RESOURCES", ACPI_RESOURCES}, 1646 {"ACPI_DEBUGGER", ACPI_DEBUGGER}, 1647 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 1648 1649 {"ACPI_BUS", ACPI_BUS}, 1650 {"ACPI_SYSTEM", ACPI_SYSTEM}, 1651 {"ACPI_POWER", ACPI_POWER}, 1652 {"ACPI_EC", ACPI_EC}, 1653 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 1654 {"ACPI_BATTERY", ACPI_BATTERY}, 1655 {"ACPI_BUTTON", ACPI_BUTTON}, 1656 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 1657 {"ACPI_THERMAL", ACPI_THERMAL}, 1658 {"ACPI_FAN", ACPI_FAN}, 1659 1660 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 1661 {NULL, 0} 1662 }; 1663 1664 static struct debugtag dbg_level[] = { 1665 {"ACPI_LV_OK", ACPI_LV_OK}, 1666 {"ACPI_LV_INFO", ACPI_LV_INFO}, 1667 {"ACPI_LV_WARN", ACPI_LV_WARN}, 1668 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 1669 {"ACPI_LV_FATAL", ACPI_LV_FATAL}, 1670 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 1671 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 1672 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 1673 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 1674 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 1675 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 1676 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 1677 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 1678 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 1679 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 1680 {"ACPI_LV_TRASH", ACPI_LV_TRASH}, 1681 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 1682 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 1683 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 1684 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 1685 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 1686 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 1687 {"ACPI_LV_IO", ACPI_LV_IO}, 1688 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 1689 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 1690 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 1691 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 1692 {"ACPI_LV_INIT", ACPI_LV_INIT}, 1693 {"ACPI_LV_ALL", ACPI_LV_ALL}, 1694 {"ACPI_DB_AML_DISASSEMBLE", ACPI_DB_AML_DISASSEMBLE}, 1695 {"ACPI_DB_VERBOSE_INFO", ACPI_DB_VERBOSE_INFO}, 1696 {"ACPI_DB_FULL_TABLES", ACPI_DB_FULL_TABLES}, 1697 {"ACPI_DB_EVENTS", ACPI_DB_EVENTS}, 1698 {"ACPI_DB_VERBOSE", ACPI_DB_VERBOSE}, 1699 {NULL, 0} 1700 }; 1701 1702 static void 1703 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1704 { 1705 char *ep; 1706 int i, l; 1707 int set; 1708 1709 while (*cp) { 1710 if (isspace(*cp)) { 1711 cp++; 1712 continue; 1713 } 1714 ep = cp; 1715 while (*ep && !isspace(*ep)) 1716 ep++; 1717 if (*cp == '!') { 1718 set = 0; 1719 cp++; 1720 if (cp == ep) 1721 continue; 1722 } else { 1723 set = 1; 1724 } 1725 l = ep - cp; 1726 for (i = 0; tag[i].name != NULL; i++) { 1727 if (!strncmp(cp, tag[i].name, l)) { 1728 if (set) { 1729 *flag |= tag[i].value; 1730 } else { 1731 *flag &= ~tag[i].value; 1732 } 1733 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1734 } 1735 } 1736 cp = ep; 1737 } 1738 } 1739 1740 static void 1741 acpi_set_debugging(void *junk) 1742 { 1743 char *cp; 1744 1745 AcpiDbgLayer = 0; 1746 AcpiDbgLevel = 0; 1747 if ((cp = getenv("debug.acpi.layer")) != NULL) 1748 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1749 if ((cp = getenv("debug.acpi.level")) != NULL) 1750 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1751 1752 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1753 } 1754 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 1755 #endif 1756