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 u_int32_t acpi_isa_get_logicalid(device_t dev); 115 static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids); 116 117 static void acpi_probe_children(device_t bus); 118 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); 119 120 static void acpi_shutdown_pre_sync(void *arg, int howto); 121 static void acpi_shutdown_final(void *arg, int howto); 122 123 static void acpi_enable_fixed_events(struct acpi_softc *sc); 124 125 static void acpi_system_eventhandler_sleep(void *arg, int state); 126 static void acpi_system_eventhandler_wakeup(void *arg, int state); 127 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 128 129 static device_method_t acpi_methods[] = { 130 /* Device interface */ 131 DEVMETHOD(device_identify, acpi_identify), 132 DEVMETHOD(device_probe, acpi_probe), 133 DEVMETHOD(device_attach, acpi_attach), 134 DEVMETHOD(device_shutdown, bus_generic_shutdown), 135 DEVMETHOD(device_suspend, bus_generic_suspend), 136 DEVMETHOD(device_resume, bus_generic_resume), 137 138 /* Bus interface */ 139 DEVMETHOD(bus_add_child, acpi_add_child), 140 DEVMETHOD(bus_print_child, acpi_print_child), 141 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 142 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 143 DEVMETHOD(bus_set_resource, acpi_set_resource), 144 DEVMETHOD(bus_get_resource, acpi_get_resource), 145 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 146 DEVMETHOD(bus_release_resource, acpi_release_resource), 147 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 148 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 149 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 150 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 151 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 152 153 /* ISA emulation */ 154 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 155 156 {0, 0} 157 }; 158 159 static driver_t acpi_driver = { 160 "acpi", 161 acpi_methods, 162 sizeof(struct acpi_softc), 163 }; 164 165 devclass_t acpi_devclass; 166 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 167 MODULE_VERSION(acpi, 100); 168 169 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); 170 SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); 171 static int acpi_ca_version = ACPI_CA_VERSION; 172 SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, ""); 173 174 /* 175 * ACPI can only be loaded as a module by the loader; activating it after 176 * system bootstrap time is not useful, and can be fatal to the system. 177 * It also cannot be unloaded, since the entire system bus heirarchy hangs off it. 178 */ 179 static int 180 acpi_modevent(struct module *mod, int event, void *junk) 181 { 182 switch(event) { 183 case MOD_LOAD: 184 if (!cold) 185 return(EPERM); 186 break; 187 case MOD_UNLOAD: 188 return(EBUSY); 189 default: 190 break; 191 } 192 return(0); 193 } 194 195 /* 196 * Detect ACPI, perform early initialisation 197 */ 198 static void 199 acpi_identify(driver_t *driver, device_t parent) 200 { 201 device_t child; 202 int error; 203 #ifdef ENABLE_DEBUGGER 204 char *debugpoint = getenv("debug.acpi.debugger"); 205 #endif 206 207 FUNCTION_TRACE(__func__); 208 209 if(!cold){ 210 printf("Don't load this driver from userland!!\n"); 211 return ; 212 } 213 214 /* 215 * Check that we haven't been disabled with a hint. 216 */ 217 if (!resource_int_value("acpi", 0, "disabled", &error) && 218 (error != 0)) 219 return_VOID; 220 221 /* 222 * Make sure we're not being doubly invoked. 223 */ 224 if (device_find_child(parent, "acpi", 0) != NULL) 225 return_VOID; 226 227 /* initialise the ACPI mutex */ 228 mtx_init(&acpi_mutex, "ACPI global lock", MTX_DEF); 229 230 /* 231 * Start up the ACPI CA subsystem. 232 */ 233 #ifdef ENABLE_DEBUGGER 234 if (debugpoint && !strcmp(debugpoint, "init")) 235 acpi_EnterDebugger(); 236 #endif 237 if ((error = AcpiInitializeSubsystem()) != AE_OK) { 238 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 239 return_VOID; 240 } 241 #ifdef ENABLE_DEBUGGER 242 if (debugpoint && !strcmp(debugpoint, "tables")) 243 acpi_EnterDebugger(); 244 #endif 245 if ((error = AcpiLoadTables()) != AE_OK) { 246 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 247 return_VOID; 248 } 249 250 /* 251 * Attach the actual ACPI device. 252 */ 253 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 254 device_printf(parent, "ACPI: could not attach\n"); 255 return_VOID; 256 } 257 } 258 259 /* 260 * Fetch some descriptive data from ACPI to put in our attach message 261 */ 262 static int 263 acpi_probe(device_t dev) 264 { 265 ACPI_TABLE_HEADER th; 266 char buf[20]; 267 ACPI_STATUS status; 268 int error; 269 270 FUNCTION_TRACE(__func__); 271 ACPI_LOCK; 272 273 if ((status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) { 274 device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status)); 275 error = ENXIO; 276 } else { 277 sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); 278 device_set_desc_copy(dev, buf); 279 error = 0; 280 } 281 ACPI_UNLOCK; 282 return_VALUE(error); 283 } 284 285 static int 286 acpi_attach(device_t dev) 287 { 288 struct acpi_softc *sc; 289 ACPI_STATUS status; 290 int error; 291 UINT32 flags; 292 293 #ifdef ENABLE_DEBUGGER 294 char *debugpoint = getenv("debug.acpi.debugger"); 295 #endif 296 297 FUNCTION_TRACE(__func__); 298 ACPI_LOCK; 299 sc = device_get_softc(dev); 300 bzero(sc, sizeof(*sc)); 301 sc->acpi_dev = dev; 302 303 acpi_install_wakeup_handler(sc); 304 305 #ifdef ENABLE_DEBUGGER 306 if (debugpoint && !strcmp(debugpoint, "spaces")) 307 acpi_EnterDebugger(); 308 #endif 309 310 /* 311 * Install the default address space handlers. 312 */ 313 error = ENXIO; 314 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 315 ACPI_ADR_SPACE_SYSTEM_MEMORY, 316 ACPI_DEFAULT_HANDLER, 317 NULL, NULL)) != AE_OK) { 318 device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status)); 319 goto out; 320 } 321 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 322 ACPI_ADR_SPACE_SYSTEM_IO, 323 ACPI_DEFAULT_HANDLER, 324 NULL, NULL)) != AE_OK) { 325 device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status)); 326 goto out; 327 } 328 if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 329 ACPI_ADR_SPACE_PCI_CONFIG, 330 ACPI_DEFAULT_HANDLER, 331 NULL, NULL)) != AE_OK) { 332 device_printf(dev, "could not initialise PciConfig handler: %s\n", AcpiFormatException(status)); 333 goto out; 334 } 335 336 /* 337 * Bring ACPI fully online. 338 * 339 * Note that some systems (specifically, those with namespace evaluation issues 340 * that require the avoidance of parts of the namespace) must avoid running _INI 341 * and _STA on everything, as well as dodging the final object init pass. 342 * 343 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 344 * 345 * XXX We should arrange for the object init pass after we have attached all our 346 * child devices, but on many systems it works here. 347 */ 348 #ifdef ENABLE_DEBUGGER 349 if (debugpoint && !strcmp(debugpoint, "enable")) 350 acpi_EnterDebugger(); 351 #endif 352 flags = 0; 353 if (getenv("debug.acpi.avoid") != NULL) 354 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 355 if ((status = AcpiEnableSubsystem(flags)) != AE_OK) { 356 device_printf(dev, "could not enable ACPI: %s\n", AcpiFormatException(status)); 357 goto out; 358 } 359 360 /* 361 * Setup our sysctl tree. 362 * 363 * XXX: This doesn't check to make sure that none of these fail. 364 */ 365 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 366 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 367 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 368 device_get_name(dev), CTLFLAG_RD, 0, ""); 369 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 370 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 371 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 372 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 373 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 374 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 375 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 376 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 377 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 378 379 /* 380 * Dispatch the default sleep state to devices. 381 * TBD: should be configured from userland policy manager. 382 */ 383 sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; 384 sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; 385 sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; 386 387 acpi_enable_fixed_events(sc); 388 389 /* 390 * Scan the namespace and attach/initialise children. 391 */ 392 #ifdef ENABLE_DEBUGGER 393 if (debugpoint && !strcmp(debugpoint, "probe")) 394 acpi_EnterDebugger(); 395 #endif 396 if (!acpi_disabled("bus")) 397 acpi_probe_children(dev); 398 399 /* 400 * Register our shutdown handlers 401 */ 402 EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); 403 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); 404 405 /* 406 * Register our acpi event handlers. 407 * XXX should be configurable eg. via userland policy manager. 408 */ 409 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); 410 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); 411 412 /* 413 * Flag our initial states. 414 */ 415 sc->acpi_enabled = 1; 416 sc->acpi_sstate = ACPI_STATE_S0; 417 418 /* 419 * Create the control device 420 */ 421 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); 422 sc->acpi_dev_t->si_drv1 = sc; 423 424 #ifdef ENABLE_DEBUGGER 425 if (debugpoint && !strcmp(debugpoint, "running")) 426 acpi_EnterDebugger(); 427 #endif 428 error = 0; 429 430 out: 431 ACPI_UNLOCK; 432 return_VALUE(error); 433 } 434 435 /* 436 * Handle a new device being added 437 */ 438 static device_t 439 acpi_add_child(device_t bus, int order, const char *name, int unit) 440 { 441 struct acpi_device *ad; 442 device_t child; 443 444 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) 445 return(NULL); 446 bzero(ad, sizeof(*ad)); 447 448 resource_list_init(&ad->ad_rl); 449 450 child = device_add_child_ordered(bus, order, name, unit); 451 if (child != NULL) 452 device_set_ivars(child, ad); 453 return(child); 454 } 455 456 /* 457 * Print child device resource usage 458 */ 459 static int 460 acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) 461 { 462 struct resource_list_entry *rle; 463 int printed, retval; 464 465 printed = 0; 466 retval = 0; 467 468 if (!SLIST_FIRST(rl)) 469 return(0); 470 471 /* Yes, this is kinda cheating */ 472 SLIST_FOREACH(rle, rl, link) { 473 if (rle->type == type) { 474 if (printed == 0) 475 retval += printf(" %s ", name); 476 else if (printed > 0) 477 retval += printf(","); 478 printed++; 479 retval += printf(format, rle->start); 480 if (rle->count > 1) { 481 retval += printf("-"); 482 retval += printf(format, rle->start + 483 rle->count - 1); 484 } 485 } 486 } 487 return(retval); 488 } 489 490 static int 491 acpi_print_child(device_t bus, device_t child) 492 { 493 struct acpi_device *adev = device_get_ivars(child); 494 struct resource_list *rl = &adev->ad_rl; 495 int retval = 0; 496 497 retval += bus_print_child_header(bus, child); 498 retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 499 retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 500 retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 501 retval += bus_print_child_footer(bus, child); 502 503 return(retval); 504 } 505 506 507 /* 508 * Handle per-device ivars 509 */ 510 static int 511 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 512 { 513 struct acpi_device *ad; 514 515 if ((ad = device_get_ivars(child)) == NULL) { 516 printf("device has no ivars\n"); 517 return(ENOENT); 518 } 519 520 switch(index) { 521 /* ACPI ivars */ 522 case ACPI_IVAR_HANDLE: 523 *(ACPI_HANDLE *)result = ad->ad_handle; 524 break; 525 case ACPI_IVAR_MAGIC: 526 *(int *)result = ad->ad_magic; 527 break; 528 case ACPI_IVAR_PRIVATE: 529 *(void **)result = ad->ad_private; 530 break; 531 532 /* ISA compatibility */ 533 case ISA_IVAR_VENDORID: 534 case ISA_IVAR_SERIAL: 535 case ISA_IVAR_COMPATID: 536 *(int *)result = -1; 537 break; 538 539 case ISA_IVAR_LOGICALID: 540 *(int *)result = acpi_isa_get_logicalid(child); 541 break; 542 543 default: 544 panic("bad ivar read request (%d)\n", index); 545 return(ENOENT); 546 } 547 return(0); 548 } 549 550 static int 551 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 552 { 553 struct acpi_device *ad; 554 555 if ((ad = device_get_ivars(child)) == NULL) { 556 printf("device has no ivars\n"); 557 return(ENOENT); 558 } 559 560 switch(index) { 561 /* ACPI ivars */ 562 case ACPI_IVAR_HANDLE: 563 ad->ad_handle = (ACPI_HANDLE)value; 564 break; 565 case ACPI_IVAR_MAGIC: 566 ad->ad_magic = (int )value; 567 break; 568 case ACPI_IVAR_PRIVATE: 569 ad->ad_private = (void *)value; 570 break; 571 572 default: 573 panic("bad ivar write request (%d)\n", index); 574 return(ENOENT); 575 } 576 return(0); 577 } 578 579 /* 580 * Handle child resource allocation/removal 581 */ 582 static int 583 acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 584 { 585 struct acpi_device *ad = device_get_ivars(child); 586 struct resource_list *rl = &ad->ad_rl; 587 588 resource_list_add(rl, type, rid, start, start + count -1, count); 589 590 return(0); 591 } 592 593 static int 594 acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 595 { 596 struct acpi_device *ad = device_get_ivars(child); 597 struct resource_list *rl = &ad->ad_rl; 598 struct resource_list_entry *rle; 599 600 rle = resource_list_find(rl, type, rid); 601 if (!rle) 602 return(ENOENT); 603 604 if (startp) 605 *startp = rle->start; 606 if (countp) 607 *countp = rle->count; 608 609 return(0); 610 } 611 612 static struct resource * 613 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 614 u_long start, u_long end, u_long count, u_int flags) 615 { 616 struct acpi_device *ad = device_get_ivars(child); 617 struct resource_list *rl = &ad->ad_rl; 618 619 return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); 620 } 621 622 static int 623 acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) 624 { 625 struct acpi_device *ad = device_get_ivars(child); 626 struct resource_list *rl = &ad->ad_rl; 627 628 return(resource_list_release(rl, bus, child, type, rid, r)); 629 } 630 631 /* 632 * Handle ISA-like devices probing for a PnP ID to match. 633 */ 634 #define PNP_EISAID(s) \ 635 ((((s[0] - '@') & 0x1f) << 2) \ 636 | (((s[1] - '@') & 0x18) >> 3) \ 637 | (((s[1] - '@') & 0x07) << 13) \ 638 | (((s[2] - '@') & 0x1f) << 8) \ 639 | (PNP_HEXTONUM(s[4]) << 16) \ 640 | (PNP_HEXTONUM(s[3]) << 20) \ 641 | (PNP_HEXTONUM(s[6]) << 24) \ 642 | (PNP_HEXTONUM(s[5]) << 28)) 643 644 static u_int32_t 645 acpi_isa_get_logicalid(device_t dev) 646 { 647 ACPI_HANDLE h; 648 ACPI_DEVICE_INFO devinfo; 649 ACPI_STATUS error; 650 u_int32_t pnpid; 651 652 FUNCTION_TRACE(__func__); 653 654 pnpid = 0; 655 ACPI_LOCK; 656 657 /* fetch and validate the HID */ 658 if ((h = acpi_get_handle(dev)) == NULL) 659 goto out; 660 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 661 goto out; 662 if (!(devinfo.Valid & ACPI_VALID_HID)) 663 goto out; 664 665 pnpid = PNP_EISAID(devinfo.HardwareId); 666 out: 667 ACPI_UNLOCK; 668 return_VALUE(pnpid); 669 } 670 671 static int 672 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 673 { 674 int result; 675 u_int32_t pnpid; 676 677 FUNCTION_TRACE(__func__); 678 679 /* 680 * ISA-style drivers attached to ACPI may persist and 681 * probe manually if we return ENOENT. We never want 682 * that to happen, so don't ever return it. 683 */ 684 result = ENXIO; 685 686 /* scan the supplied IDs for a match */ 687 pnpid = acpi_isa_get_logicalid(child); 688 while (ids && ids->ip_id) { 689 if (pnpid == ids->ip_id) { 690 result = 0; 691 goto out; 692 } 693 ids++; 694 } 695 out: 696 return_VALUE(result); 697 } 698 699 /* 700 * Scan relevant portions of the ACPI namespace and attach child devices. 701 * 702 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and \_SB_ scopes, 703 * and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec. 704 */ 705 static void 706 acpi_probe_children(device_t bus) 707 { 708 ACPI_HANDLE parent; 709 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL}; 710 int i; 711 712 FUNCTION_TRACE(__func__); 713 ACPI_ASSERTLOCK; 714 715 /* 716 * Create any static children by calling device identify methods. 717 */ 718 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 719 bus_generic_probe(bus); 720 721 /* 722 * Scan the namespace and insert placeholders for all the devices that 723 * we find. 724 * 725 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 726 * we want to create nodes for all devices, not just those that are currently 727 * present. (This assumes that we don't want to create/remove devices as they 728 * appear, which might be smarter.) 729 */ 730 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 731 for (i = 0; scopes[i] != NULL; i++) 732 if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) 733 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); 734 735 /* 736 * Scan all of the child devices we have created and let them probe/attach. 737 */ 738 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 739 bus_generic_attach(bus); 740 741 /* 742 * Some of these children may have attached others as part of their attach 743 * process (eg. the root PCI bus driver), so rescan. 744 */ 745 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 746 bus_generic_attach(bus); 747 748 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 749 return_VOID; 750 } 751 752 /* 753 * Evaluate a child device and determine whether we might attach a device to 754 * it. 755 */ 756 static ACPI_STATUS 757 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 758 { 759 ACPI_OBJECT_TYPE type; 760 device_t child, bus = (device_t)context; 761 762 FUNCTION_TRACE(__func__); 763 764 /* 765 * Skip this device if we think we'll have trouble with it. 766 */ 767 if (acpi_avoid(handle)) 768 return_ACPI_STATUS(AE_OK); 769 770 if (AcpiGetType(handle, &type) == AE_OK) { 771 switch(type) { 772 case ACPI_TYPE_DEVICE: 773 case ACPI_TYPE_PROCESSOR: 774 case ACPI_TYPE_THERMAL: 775 case ACPI_TYPE_POWER: 776 if (acpi_disabled("children")) 777 break; 778 /* 779 * Create a placeholder device for this node. Sort the placeholder 780 * so that the probe/attach passes will run breadth-first. 781 */ 782 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle))); 783 child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); 784 if (child == NULL) 785 break; 786 acpi_set_handle(child, handle); 787 788 /* 789 * Check that the device is present. If it's not present, 790 * leave it disabled (so that we have a device_t attached to 791 * the handle, but we don't probe it). 792 */ 793 if ((type == ACPI_TYPE_DEVICE) && (!acpi_DeviceIsPresent(child))) { 794 device_disable(child); 795 break; 796 } 797 798 /* 799 * Get the device's resource settings and attach them. 800 * Note that if the device has _PRS but no _CRS, we need 801 * to decide when it's appropriate to try to configure the 802 * device. Ignore the return value here; it's OK for the 803 * device not to have any resources. 804 */ 805 acpi_parse_resources(child, handle, &acpi_res_parse_set); 806 807 /* if we're debugging, probe/attach now rather than later */ 808 DEBUG_EXEC(device_probe_and_attach(child)); 809 break; 810 } 811 } 812 return_ACPI_STATUS(AE_OK); 813 } 814 815 static void 816 acpi_shutdown_pre_sync(void *arg, int howto) 817 { 818 819 ACPI_ASSERTLOCK; 820 821 /* 822 * Disable all ACPI events before soft off, otherwise the system 823 * will be turned on again on some laptops. 824 * 825 * XXX this should probably be restricted to masking some events just 826 * before powering down, since we may still need ACPI during the 827 * shutdown process. 828 */ 829 acpi_Disable((struct acpi_softc *)arg); 830 } 831 832 static void 833 acpi_shutdown_final(void *arg, int howto) 834 { 835 ACPI_STATUS status; 836 837 ACPI_ASSERTLOCK; 838 839 if (howto & RB_POWEROFF) { 840 printf("Power system off using ACPI...\n"); 841 if ((status = AcpiEnterSleepState(acpi_off_state)) != AE_OK) { 842 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 843 } else { 844 DELAY(1000000); 845 printf("ACPI power-off failed - timeout\n"); 846 } 847 } 848 } 849 850 static void 851 acpi_enable_fixed_events(struct acpi_softc *sc) 852 { 853 static int first_time = 1; 854 #define MSGFORMAT "%s button is handled as a fixed feature programming model.\n" 855 856 ACPI_ASSERTLOCK; 857 858 /* Enable and clear fixed events and install handlers. */ 859 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) { 860 AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 861 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); 862 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 863 acpi_eventhandler_power_button_for_sleep, sc); 864 if (first_time) { 865 device_printf(sc->acpi_dev, MSGFORMAT, "power"); 866 } 867 } 868 if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) { 869 AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 870 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); 871 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 872 acpi_eventhandler_sleep_button_for_sleep, sc); 873 if (first_time) { 874 device_printf(sc->acpi_dev, MSGFORMAT, "sleep"); 875 } 876 } 877 878 first_time = 0; 879 } 880 881 /* 882 * Returns true if the device is actually present and should 883 * be attached to. This requires the present, enabled, UI-visible 884 * and diagnostics-passed bits to be set. 885 */ 886 BOOLEAN 887 acpi_DeviceIsPresent(device_t dev) 888 { 889 ACPI_HANDLE h; 890 ACPI_DEVICE_INFO devinfo; 891 ACPI_STATUS error; 892 893 ACPI_ASSERTLOCK; 894 895 if ((h = acpi_get_handle(dev)) == NULL) 896 return(FALSE); 897 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 898 return(FALSE); 899 /* XXX 0xf is probably not appropriate */ 900 if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) 901 return(TRUE); 902 return(FALSE); 903 } 904 905 /* 906 * Match a HID string against a device 907 */ 908 BOOLEAN 909 acpi_MatchHid(device_t dev, char *hid) 910 { 911 ACPI_HANDLE h; 912 ACPI_DEVICE_INFO devinfo; 913 ACPI_STATUS error; 914 915 ACPI_ASSERTLOCK; 916 917 if (hid == NULL) 918 return(FALSE); 919 if ((h = acpi_get_handle(dev)) == NULL) 920 return(FALSE); 921 if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) 922 return(FALSE); 923 if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId)) 924 return(TRUE); 925 return(FALSE); 926 } 927 928 /* 929 * Return the handle of a named object within our scope, ie. that of (parent) 930 * or one if its parents. 931 */ 932 ACPI_STATUS 933 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 934 { 935 ACPI_HANDLE r; 936 ACPI_STATUS status; 937 938 ACPI_ASSERTLOCK; 939 940 /* walk back up the tree to the root */ 941 for (;;) { 942 status = AcpiGetHandle(parent, path, &r); 943 if (status == AE_OK) { 944 *result = r; 945 return(AE_OK); 946 } 947 if (status != AE_NOT_FOUND) 948 return(AE_OK); 949 if (AcpiGetParent(parent, &r) != AE_OK) 950 return(AE_NOT_FOUND); 951 parent = r; 952 } 953 } 954 955 /* 956 * Allocate a buffer with a preset data size. 957 */ 958 ACPI_BUFFER * 959 acpi_AllocBuffer(int size) 960 { 961 ACPI_BUFFER *buf; 962 963 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 964 return(NULL); 965 buf->Length = size; 966 buf->Pointer = (void *)(buf + 1); 967 return(buf); 968 } 969 970 /* 971 * Perform the tedious double-get procedure required for fetching something into 972 * an ACPI_BUFFER that has not been initialised. 973 */ 974 ACPI_STATUS 975 acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) 976 { 977 ACPI_STATUS status; 978 979 ACPI_ASSERTLOCK; 980 981 buf->Length = 0; 982 buf->Pointer = NULL; 983 984 if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) 985 return(status); 986 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 987 return(AE_NO_MEMORY); 988 return(func(handle, buf)); 989 } 990 991 /* 992 * Perform the tedious double-get procedure required for fetching a table into 993 * an ACPI_BUFFER that has not been initialised. 994 */ 995 ACPI_STATUS 996 acpi_GetTableIntoBuffer(ACPI_TABLE_TYPE table, UINT32 instance, ACPI_BUFFER *buf) 997 { 998 ACPI_STATUS status; 999 1000 ACPI_ASSERTLOCK; 1001 1002 buf->Length = 0; 1003 buf->Pointer = NULL; 1004 1005 if ((status = AcpiGetTable(table, instance, buf)) != AE_BUFFER_OVERFLOW) 1006 return(status); 1007 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 1008 return(AE_NO_MEMORY); 1009 return(AcpiGetTable(table, instance, buf)); 1010 } 1011 1012 /* 1013 * Perform the tedious double-evaluate procedure for evaluating something into 1014 * an ACPI_BUFFER that has not been initialised. Note that this evaluates 1015 * twice, so avoid applying this to things that may have side-effects. 1016 * 1017 * This is like AcpiEvaluateObject with automatic buffer allocation. 1018 */ 1019 ACPI_STATUS 1020 acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname, ACPI_OBJECT_LIST *params, 1021 ACPI_BUFFER *buf) 1022 { 1023 ACPI_STATUS status; 1024 1025 ACPI_ASSERTLOCK; 1026 1027 buf->Length = 0; 1028 buf->Pointer = NULL; 1029 1030 if ((status = AcpiEvaluateObject(object, pathname, params, buf)) != AE_BUFFER_OVERFLOW) 1031 return(status); 1032 if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) 1033 return(AE_NO_MEMORY); 1034 return(AcpiEvaluateObject(object, pathname, params, buf)); 1035 } 1036 1037 /* 1038 * Evaluate a path that should return an integer. 1039 */ 1040 ACPI_STATUS 1041 acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number) 1042 { 1043 ACPI_STATUS error; 1044 ACPI_BUFFER buf; 1045 ACPI_OBJECT param, *p; 1046 int i; 1047 1048 ACPI_ASSERTLOCK; 1049 1050 if (handle == NULL) 1051 handle = ACPI_ROOT_OBJECT; 1052 1053 /* 1054 * Assume that what we've been pointed at is an Integer object, or 1055 * a method that will return an Integer. 1056 */ 1057 buf.Pointer = ¶m; 1058 buf.Length = sizeof(param); 1059 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1060 if (param.Type == ACPI_TYPE_INTEGER) { 1061 *number = param.Integer.Value; 1062 } else { 1063 error = AE_TYPE; 1064 } 1065 } 1066 1067 /* 1068 * In some applications, a method that's expected to return an Integer 1069 * may instead return a Buffer (probably to simplify some internal 1070 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1071 * convert it into an Integer as best we can. 1072 * 1073 * This is a hack. 1074 */ 1075 if (error == AE_BUFFER_OVERFLOW) { 1076 if ((buf.Pointer = AcpiOsCallocate(buf.Length)) == NULL) { 1077 error = AE_NO_MEMORY; 1078 } else { 1079 if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { 1080 p = (ACPI_OBJECT *)buf.Pointer; 1081 if (p->Type != ACPI_TYPE_BUFFER) { 1082 error = AE_TYPE; 1083 } else { 1084 if (p->Buffer.Length > sizeof(int)) { 1085 error = AE_BAD_DATA; 1086 } else { 1087 *number = 0; 1088 for (i = 0; i < p->Buffer.Length; i++) 1089 *number += (*(p->Buffer.Pointer + i) << (i * 8)); 1090 } 1091 } 1092 } 1093 } 1094 AcpiOsFree(buf.Pointer); 1095 } 1096 return(error); 1097 } 1098 1099 /* 1100 * Iterate over the elements of an a package object, calling the supplied 1101 * function for each element. 1102 * 1103 * XXX possible enhancement might be to abort traversal on error. 1104 */ 1105 ACPI_STATUS 1106 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, void (* func)(ACPI_OBJECT *comp, void *arg), void *arg) 1107 { 1108 ACPI_OBJECT *comp; 1109 int i; 1110 1111 if ((pkg == NULL) || (pkg->Type != ACPI_TYPE_PACKAGE)) 1112 return(AE_BAD_PARAMETER); 1113 1114 /* iterate over components */ 1115 for (i = 0, comp = pkg->Package.Elements; i < pkg->Package.Count; i++, comp++) 1116 func(comp, arg); 1117 1118 return(AE_OK); 1119 } 1120 1121 /* 1122 * Find the (index)th resource object in a set. 1123 */ 1124 ACPI_STATUS 1125 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1126 { 1127 ACPI_RESOURCE *rp; 1128 int i; 1129 1130 rp = (ACPI_RESOURCE *)buf->Pointer; 1131 i = index; 1132 while (i-- > 0) { 1133 /* range check */ 1134 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1135 return(AE_BAD_PARAMETER); 1136 /* check for terminator */ 1137 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1138 (rp->Length == 0)) 1139 return(AE_NOT_FOUND); 1140 rp = ACPI_RESOURCE_NEXT(rp); 1141 } 1142 if (resp != NULL) 1143 *resp = rp; 1144 return(AE_OK); 1145 } 1146 1147 /* 1148 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 1149 * 1150 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 1151 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 1152 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 1153 * resources. 1154 */ 1155 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 1156 1157 ACPI_STATUS 1158 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 1159 { 1160 ACPI_RESOURCE *rp; 1161 void *newp; 1162 1163 /* 1164 * Initialise the buffer if necessary. 1165 */ 1166 if (buf->Pointer == NULL) { 1167 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 1168 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 1169 return(AE_NO_MEMORY); 1170 rp = (ACPI_RESOURCE *)buf->Pointer; 1171 rp->Id = ACPI_RSTYPE_END_TAG; 1172 rp->Length = 0; 1173 } 1174 if (res == NULL) 1175 return(AE_OK); 1176 1177 /* 1178 * Scan the current buffer looking for the terminator. 1179 * This will either find the terminator or hit the end 1180 * of the buffer and return an error. 1181 */ 1182 rp = (ACPI_RESOURCE *)buf->Pointer; 1183 for (;;) { 1184 /* range check, don't go outside the buffer */ 1185 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1186 return(AE_BAD_PARAMETER); 1187 if ((rp->Id == ACPI_RSTYPE_END_TAG) || 1188 (rp->Length == 0)) { 1189 break; 1190 } 1191 rp = ACPI_RESOURCE_NEXT(rp); 1192 } 1193 1194 /* 1195 * Check the size of the buffer and expand if required. 1196 * 1197 * Required size is: 1198 * size of existing resources before terminator + 1199 * size of new resource and header + 1200 * size of terminator. 1201 * 1202 * Note that this loop should really only run once, unless 1203 * for some reason we are stuffing a *really* huge resource. 1204 */ 1205 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 1206 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA + 1207 ACPI_RESOURCE_LENGTH) >= buf->Length) { 1208 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 1209 return(AE_NO_MEMORY); 1210 bcopy(buf->Pointer, newp, buf->Length); 1211 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 1212 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 1213 AcpiOsFree(buf->Pointer); 1214 buf->Pointer = newp; 1215 buf->Length += buf->Length; 1216 } 1217 1218 /* 1219 * Insert the new resource. 1220 */ 1221 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA); 1222 1223 /* 1224 * And add the terminator. 1225 */ 1226 rp = ACPI_RESOURCE_NEXT(rp); 1227 rp->Id = ACPI_RSTYPE_END_TAG; 1228 rp->Length = 0; 1229 1230 return(AE_OK); 1231 } 1232 1233 1234 /* 1235 * Set the system sleep state 1236 * 1237 * Currently we only support S1 and S5 1238 */ 1239 ACPI_STATUS 1240 acpi_SetSleepState(struct acpi_softc *sc, int state) 1241 { 1242 ACPI_STATUS status = AE_OK; 1243 UINT16 Count; 1244 UINT8 TypeA; 1245 UINT8 TypeB; 1246 1247 FUNCTION_TRACE_U32(__func__, state); 1248 ACPI_ASSERTLOCK; 1249 1250 switch (state) { 1251 case ACPI_STATE_S0: /* XXX only for testing */ 1252 status = AcpiEnterSleepState((UINT8)state); 1253 if (status != AE_OK) { 1254 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1255 } 1256 break; 1257 1258 case ACPI_STATE_S1: 1259 case ACPI_STATE_S2: 1260 case ACPI_STATE_S3: 1261 case ACPI_STATE_S4: 1262 status = AcpiHwObtainSleepTypeRegisterData((UINT8)state, &TypeA, &TypeB); 1263 if (status != AE_OK) { 1264 device_printf(sc->acpi_dev, "AcpiHwObtainSleepTypeRegisterData failed - %s\n", AcpiFormatException(status)); 1265 break; 1266 } 1267 1268 /* 1269 * Inform all devices that we are going to sleep. 1270 */ 1271 if (DEVICE_SUSPEND(root_bus) != 0) { 1272 /* 1273 * Re-wake the system. 1274 * 1275 * XXX note that a better two-pass approach with a 'veto' pass 1276 * followed by a "real thing" pass would be better, but the 1277 * current bus interface does not provide for this. 1278 */ 1279 DEVICE_RESUME(root_bus); 1280 return_ACPI_STATUS(AE_ERROR); 1281 } 1282 sc->acpi_sstate = state; 1283 1284 if (state != ACPI_STATE_S1) { 1285 acpi_sleep_machdep(sc, state); 1286 1287 /* AcpiEnterSleepState() maybe incompleted, unlock here. */ 1288 AcpiUtReleaseMutex(ACPI_MTX_HARDWARE); 1289 1290 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 1291 if (state >= ACPI_STATE_S4) { 1292 acpi_Disable(sc); 1293 acpi_Enable(sc); 1294 } 1295 } else { 1296 status = AcpiEnterSleepState((UINT8)state); 1297 if (status != AE_OK) { 1298 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status)); 1299 break; 1300 } 1301 /* wait for the WAK_STS bit */ 1302 Count = 0; 1303 while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) { 1304 AcpiOsSleep(0, 1); 1305 /* 1306 * Some BIOSes don't set WAK_STS at all, 1307 * give up waiting for wakeup if we time out. 1308 */ 1309 if (Count > 1000) { 1310 break; /* giving up */ 1311 } 1312 Count++; 1313 } 1314 } 1315 AcpiLeaveSleepState((UINT8)state); 1316 DEVICE_RESUME(root_bus); 1317 sc->acpi_sstate = ACPI_STATE_S0; 1318 acpi_enable_fixed_events(sc); 1319 break; 1320 1321 case ACPI_STATE_S5: 1322 /* 1323 * Shut down cleanly and power off. This will call us back through the 1324 * shutdown handlers. 1325 */ 1326 shutdown_nice(RB_POWEROFF); 1327 break; 1328 1329 default: 1330 status = AE_BAD_PARAMETER; 1331 break; 1332 } 1333 return_ACPI_STATUS(status); 1334 } 1335 1336 /* 1337 * Enable/Disable ACPI 1338 */ 1339 ACPI_STATUS 1340 acpi_Enable(struct acpi_softc *sc) 1341 { 1342 ACPI_STATUS status; 1343 u_int32_t flags; 1344 1345 FUNCTION_TRACE(__func__); 1346 ACPI_ASSERTLOCK; 1347 1348 flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | 1349 ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 1350 if (!sc->acpi_enabled) { 1351 status = AcpiEnableSubsystem(flags); 1352 } else { 1353 status = AE_OK; 1354 } 1355 if (status == AE_OK) 1356 sc->acpi_enabled = 1; 1357 return_ACPI_STATUS(status); 1358 } 1359 1360 ACPI_STATUS 1361 acpi_Disable(struct acpi_softc *sc) 1362 { 1363 ACPI_STATUS status; 1364 1365 FUNCTION_TRACE(__func__); 1366 ACPI_ASSERTLOCK; 1367 1368 if (sc->acpi_enabled) { 1369 status = AcpiDisable(); 1370 } else { 1371 status = AE_OK; 1372 } 1373 if (status == AE_OK) 1374 sc->acpi_enabled = 0; 1375 return_ACPI_STATUS(status); 1376 } 1377 1378 /* 1379 * ACPI Event Handlers 1380 */ 1381 1382 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 1383 1384 static void 1385 acpi_system_eventhandler_sleep(void *arg, int state) 1386 { 1387 FUNCTION_TRACE_U32(__func__, state); 1388 1389 ACPI_LOCK; 1390 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 1391 acpi_SetSleepState((struct acpi_softc *)arg, state); 1392 ACPI_UNLOCK; 1393 return_VOID; 1394 } 1395 1396 static void 1397 acpi_system_eventhandler_wakeup(void *arg, int state) 1398 { 1399 FUNCTION_TRACE_U32(__func__, state); 1400 1401 /* Well, what to do? :-) */ 1402 1403 ACPI_LOCK; 1404 ACPI_UNLOCK; 1405 1406 return_VOID; 1407 } 1408 1409 /* 1410 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 1411 */ 1412 UINT32 1413 acpi_eventhandler_power_button_for_sleep(void *context) 1414 { 1415 struct acpi_softc *sc = (struct acpi_softc *)context; 1416 1417 FUNCTION_TRACE(__func__); 1418 1419 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 1420 1421 return_VALUE(INTERRUPT_HANDLED); 1422 } 1423 1424 UINT32 1425 acpi_eventhandler_power_button_for_wakeup(void *context) 1426 { 1427 struct acpi_softc *sc = (struct acpi_softc *)context; 1428 1429 FUNCTION_TRACE(__func__); 1430 1431 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 1432 1433 return_VALUE(INTERRUPT_HANDLED); 1434 } 1435 1436 UINT32 1437 acpi_eventhandler_sleep_button_for_sleep(void *context) 1438 { 1439 struct acpi_softc *sc = (struct acpi_softc *)context; 1440 1441 FUNCTION_TRACE(__func__); 1442 1443 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 1444 1445 return_VALUE(INTERRUPT_HANDLED); 1446 } 1447 1448 UINT32 1449 acpi_eventhandler_sleep_button_for_wakeup(void *context) 1450 { 1451 struct acpi_softc *sc = (struct acpi_softc *)context; 1452 1453 FUNCTION_TRACE(__func__); 1454 1455 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 1456 1457 return_VALUE(INTERRUPT_HANDLED); 1458 } 1459 1460 /* 1461 * XXX This is kinda ugly, and should not be here. 1462 */ 1463 struct acpi_staticbuf { 1464 ACPI_BUFFER buffer; 1465 char data[512]; 1466 }; 1467 1468 char * 1469 acpi_name(ACPI_HANDLE handle) 1470 { 1471 static struct acpi_staticbuf buf; 1472 1473 ACPI_ASSERTLOCK; 1474 1475 buf.buffer.Length = 512; 1476 buf.buffer.Pointer = &buf.data[0]; 1477 1478 if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) 1479 return(buf.buffer.Pointer); 1480 return("(unknown path)"); 1481 } 1482 1483 /* 1484 * Debugging/bug-avoidance. Avoid trying to fetch info on various 1485 * parts of the namespace. 1486 */ 1487 int 1488 acpi_avoid(ACPI_HANDLE handle) 1489 { 1490 char *cp, *np; 1491 int len; 1492 1493 np = acpi_name(handle); 1494 if (*np == '\\') 1495 np++; 1496 if ((cp = getenv("debug.acpi.avoid")) == NULL) 1497 return(0); 1498 1499 /* scan the avoid list checking for a match */ 1500 for (;;) { 1501 while ((*cp != 0) && isspace(*cp)) 1502 cp++; 1503 if (*cp == 0) 1504 break; 1505 len = 0; 1506 while ((cp[len] != 0) && !isspace(cp[len])) 1507 len++; 1508 if (!strncmp(cp, np, len)) 1509 return(1); 1510 cp += len; 1511 } 1512 return(0); 1513 } 1514 1515 /* 1516 * Debugging/bug-avoidance. Disable ACPI subsystem components. 1517 */ 1518 int 1519 acpi_disabled(char *subsys) 1520 { 1521 char *cp; 1522 int len; 1523 1524 if ((cp = getenv("debug.acpi.disable")) == NULL) 1525 return(0); 1526 if (!strcmp(cp, "all")) 1527 return(1); 1528 1529 /* scan the disable list checking for a match */ 1530 for (;;) { 1531 while ((*cp != 0) && isspace(*cp)) 1532 cp++; 1533 if (*cp == 0) 1534 break; 1535 len = 0; 1536 while ((cp[len] != 0) && !isspace(cp[len])) 1537 len++; 1538 if (!strncmp(cp, subsys, len)) 1539 return(1); 1540 cp += len; 1541 } 1542 return(0); 1543 } 1544 1545 /* 1546 * Control interface. 1547 * 1548 * We multiplex ioctls for all participating ACPI devices here. Individual 1549 * drivers wanting to be accessible via /dev/acpi should use the register/deregister 1550 * interface to make their handlers visible. 1551 */ 1552 struct acpi_ioctl_hook 1553 { 1554 TAILQ_ENTRY(acpi_ioctl_hook) link; 1555 u_long cmd; 1556 int (* fn)(u_long cmd, caddr_t addr, void *arg); 1557 void *arg; 1558 }; 1559 1560 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 1561 static int acpi_ioctl_hooks_initted; 1562 1563 /* 1564 * Register an ioctl handler. 1565 */ 1566 int 1567 acpi_register_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg), void *arg) 1568 { 1569 struct acpi_ioctl_hook *hp; 1570 1571 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 1572 return(ENOMEM); 1573 hp->cmd = cmd; 1574 hp->fn = fn; 1575 hp->arg = arg; 1576 if (acpi_ioctl_hooks_initted == 0) { 1577 TAILQ_INIT(&acpi_ioctl_hooks); 1578 acpi_ioctl_hooks_initted = 1; 1579 } 1580 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 1581 return(0); 1582 } 1583 1584 /* 1585 * Deregister an ioctl handler. 1586 */ 1587 void 1588 acpi_deregister_ioctl(u_long cmd, int (* fn)(u_long cmd, caddr_t addr, void *arg)) 1589 { 1590 struct acpi_ioctl_hook *hp; 1591 1592 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 1593 if ((hp->cmd == cmd) && (hp->fn == fn)) 1594 break; 1595 1596 if (hp != NULL) { 1597 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 1598 free(hp, M_ACPIDEV); 1599 } 1600 } 1601 1602 static int 1603 acpiopen(dev_t dev, int flag, int fmt, struct thread *td) 1604 { 1605 return(0); 1606 } 1607 1608 static int 1609 acpiclose(dev_t dev, int flag, int fmt, struct thread *td) 1610 { 1611 return(0); 1612 } 1613 1614 static int 1615 acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1616 { 1617 struct acpi_softc *sc; 1618 struct acpi_ioctl_hook *hp; 1619 int error, xerror, state; 1620 1621 ACPI_LOCK; 1622 1623 error = state = 0; 1624 sc = dev->si_drv1; 1625 1626 /* 1627 * Scan the list of registered ioctls, looking for handlers. 1628 */ 1629 if (acpi_ioctl_hooks_initted) { 1630 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 1631 if (hp->cmd == cmd) { 1632 xerror = hp->fn(cmd, addr, hp->arg); 1633 if (xerror != 0) 1634 error = xerror; 1635 goto out; 1636 } 1637 } 1638 } 1639 1640 /* 1641 * Core system ioctls. 1642 */ 1643 switch (cmd) { 1644 case ACPIIO_ENABLE: 1645 if (ACPI_FAILURE(acpi_Enable(sc))) 1646 error = ENXIO; 1647 break; 1648 1649 case ACPIIO_DISABLE: 1650 if (ACPI_FAILURE(acpi_Disable(sc))) 1651 error = ENXIO; 1652 break; 1653 1654 case ACPIIO_SETSLPSTATE: 1655 if (!sc->acpi_enabled) { 1656 error = ENXIO; 1657 break; 1658 } 1659 state = *(int *)addr; 1660 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) { 1661 acpi_SetSleepState(sc, state); 1662 } else { 1663 error = EINVAL; 1664 } 1665 break; 1666 1667 default: 1668 if (error == 0) 1669 error = EINVAL; 1670 break; 1671 } 1672 1673 out: 1674 ACPI_UNLOCK; 1675 return(error); 1676 } 1677 1678 static int 1679 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 1680 { 1681 char sleep_state[10]; 1682 int error; 1683 u_int new_state, old_state; 1684 1685 old_state = *(u_int *)oidp->oid_arg1; 1686 if (old_state > ACPI_S_STATES_MAX) { 1687 strcpy(sleep_state, "unknown"); 1688 } else { 1689 strncpy(sleep_state, sleep_state_names[old_state], 1690 sizeof(sleep_state_names[old_state])); 1691 } 1692 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 1693 if (error == 0 && req->newptr != NULL) { 1694 for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX; new_state++) { 1695 if (strncmp(sleep_state, sleep_state_names[new_state], 1696 sizeof(sleep_state)) == 0) 1697 break; 1698 } 1699 if ((new_state != old_state) && (new_state <= ACPI_S_STATES_MAX)) { 1700 *(u_int *)oidp->oid_arg1 = new_state; 1701 } else { 1702 error = EINVAL; 1703 } 1704 } 1705 return(error); 1706 } 1707 1708 #ifdef ACPI_DEBUG 1709 /* 1710 * Support for parsing debug options from the kernel environment. 1711 * 1712 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 1713 * by specifying the names of the bits in the debug.acpi.layer and 1714 * debug.acpi.level environment variables. Bits may be unset by 1715 * prefixing the bit name with !. 1716 */ 1717 struct debugtag 1718 { 1719 char *name; 1720 UINT32 value; 1721 }; 1722 1723 static struct debugtag dbg_layer[] = { 1724 {"ACPI_UTILITIES", ACPI_UTILITIES}, 1725 {"ACPI_HARDWARE", ACPI_HARDWARE}, 1726 {"ACPI_EVENTS", ACPI_EVENTS}, 1727 {"ACPI_TABLES", ACPI_TABLES}, 1728 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 1729 {"ACPI_PARSER", ACPI_PARSER}, 1730 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 1731 {"ACPI_EXECUTER", ACPI_EXECUTER}, 1732 {"ACPI_RESOURCES", ACPI_RESOURCES}, 1733 {"ACPI_DEBUGGER", ACPI_DEBUGGER}, 1734 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 1735 1736 {"ACPI_BUS", ACPI_BUS}, 1737 {"ACPI_SYSTEM", ACPI_SYSTEM}, 1738 {"ACPI_POWER", ACPI_POWER}, 1739 {"ACPI_EC", ACPI_EC}, 1740 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 1741 {"ACPI_BATTERY", ACPI_BATTERY}, 1742 {"ACPI_BUTTON", ACPI_BUTTON}, 1743 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 1744 {"ACPI_THERMAL", ACPI_THERMAL}, 1745 {"ACPI_FAN", ACPI_FAN}, 1746 1747 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 1748 {NULL, 0} 1749 }; 1750 1751 static struct debugtag dbg_level[] = { 1752 {"ACPI_LV_OK", ACPI_LV_OK}, 1753 {"ACPI_LV_INFO", ACPI_LV_INFO}, 1754 {"ACPI_LV_WARN", ACPI_LV_WARN}, 1755 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 1756 {"ACPI_LV_FATAL", ACPI_LV_FATAL}, 1757 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 1758 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 1759 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 1760 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 1761 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 1762 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 1763 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 1764 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 1765 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 1766 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 1767 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 1768 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 1769 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 1770 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 1771 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 1772 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 1773 {"ACPI_LV_IO", ACPI_LV_IO}, 1774 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 1775 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 1776 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 1777 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 1778 {"ACPI_LV_INIT", ACPI_LV_INIT}, 1779 {"ACPI_LV_ALL", ACPI_LV_ALL}, 1780 {"ACPI_DB_AML_DISASSEMBLE", ACPI_DB_AML_DISASSEMBLE}, 1781 {"ACPI_DB_VERBOSE_INFO", ACPI_DB_VERBOSE_INFO}, 1782 {"ACPI_DB_FULL_TABLES", ACPI_DB_FULL_TABLES}, 1783 {"ACPI_DB_EVENTS", ACPI_DB_EVENTS}, 1784 {"ACPI_DB_VERBOSE", ACPI_DB_VERBOSE}, 1785 {NULL, 0} 1786 }; 1787 1788 static void 1789 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 1790 { 1791 char *ep; 1792 int i, l; 1793 int set; 1794 1795 while (*cp) { 1796 if (isspace(*cp)) { 1797 cp++; 1798 continue; 1799 } 1800 ep = cp; 1801 while (*ep && !isspace(*ep)) 1802 ep++; 1803 if (*cp == '!') { 1804 set = 0; 1805 cp++; 1806 if (cp == ep) 1807 continue; 1808 } else { 1809 set = 1; 1810 } 1811 l = ep - cp; 1812 for (i = 0; tag[i].name != NULL; i++) { 1813 if (!strncmp(cp, tag[i].name, l)) { 1814 if (set) { 1815 *flag |= tag[i].value; 1816 } else { 1817 *flag &= ~tag[i].value; 1818 } 1819 printf("ACPI_DEBUG: set '%s'\n", tag[i].name); 1820 } 1821 } 1822 cp = ep; 1823 } 1824 } 1825 1826 static void 1827 acpi_set_debugging(void *junk) 1828 { 1829 char *cp; 1830 1831 AcpiDbgLayer = 0; 1832 AcpiDbgLevel = 0; 1833 if ((cp = getenv("debug.acpi.layer")) != NULL) 1834 acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); 1835 if ((cp = getenv("debug.acpi.level")) != NULL) 1836 acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); 1837 1838 printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel); 1839 } 1840 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL); 1841 #endif 1842