1 /* 2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * 6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or (at 11 * your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, write to the Free Software Foundation, Inc., 20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 21 * 22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23 */ 24 25 #include <linux/module.h> 26 #include <linux/init.h> 27 #include <linux/ioport.h> 28 #include <linux/kernel.h> 29 #include <linux/list.h> 30 #include <linux/sched.h> 31 #include <linux/pm.h> 32 #include <linux/device.h> 33 #include <linux/proc_fs.h> 34 #include <linux/acpi.h> 35 #include <linux/slab.h> 36 #ifdef CONFIG_X86 37 #include <asm/mpspec.h> 38 #endif 39 #include <linux/pci.h> 40 #include <acpi/acpi_bus.h> 41 #include <acpi/acpi_drivers.h> 42 #include <linux/dmi.h> 43 44 #include "internal.h" 45 46 #define _COMPONENT ACPI_BUS_COMPONENT 47 ACPI_MODULE_NAME("bus"); 48 49 struct acpi_device *acpi_root; 50 struct proc_dir_entry *acpi_root_dir; 51 EXPORT_SYMBOL(acpi_root_dir); 52 53 #define STRUCT_TO_INT(s) (*((int*)&s)) 54 55 static int set_power_nocheck(const struct dmi_system_id *id) 56 { 57 printk(KERN_NOTICE PREFIX "%s detected - " 58 "disable power check in power transistion\n", id->ident); 59 acpi_power_nocheck = 1; 60 return 0; 61 } 62 static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { 63 { 64 set_power_nocheck, "HP Pavilion 05", { 65 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 66 DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), 67 DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, 68 {}, 69 }; 70 71 72 /* -------------------------------------------------------------------------- 73 Device Management 74 -------------------------------------------------------------------------- */ 75 76 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) 77 { 78 acpi_status status = AE_OK; 79 80 81 if (!device) 82 return -EINVAL; 83 84 /* TBD: Support fixed-feature devices */ 85 86 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); 87 if (ACPI_FAILURE(status) || !*device) { 88 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", 89 handle)); 90 return -ENODEV; 91 } 92 93 return 0; 94 } 95 96 EXPORT_SYMBOL(acpi_bus_get_device); 97 98 acpi_status acpi_bus_get_status_handle(acpi_handle handle, 99 unsigned long long *sta) 100 { 101 acpi_status status; 102 103 status = acpi_evaluate_integer(handle, "_STA", NULL, sta); 104 if (ACPI_SUCCESS(status)) 105 return AE_OK; 106 107 if (status == AE_NOT_FOUND) { 108 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | 109 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; 110 return AE_OK; 111 } 112 return status; 113 } 114 115 int acpi_bus_get_status(struct acpi_device *device) 116 { 117 acpi_status status; 118 unsigned long long sta; 119 120 status = acpi_bus_get_status_handle(device->handle, &sta); 121 if (ACPI_FAILURE(status)) 122 return -ENODEV; 123 124 STRUCT_TO_INT(device->status) = (int) sta; 125 126 if (device->status.functional && !device->status.present) { 127 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " 128 "functional but not present;\n", 129 device->pnp.bus_id, 130 (u32) STRUCT_TO_INT(device->status))); 131 } 132 133 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", 134 device->pnp.bus_id, 135 (u32) STRUCT_TO_INT(device->status))); 136 return 0; 137 } 138 EXPORT_SYMBOL(acpi_bus_get_status); 139 140 void acpi_bus_private_data_handler(acpi_handle handle, 141 void *context) 142 { 143 return; 144 } 145 EXPORT_SYMBOL(acpi_bus_private_data_handler); 146 147 int acpi_bus_get_private_data(acpi_handle handle, void **data) 148 { 149 acpi_status status = AE_OK; 150 151 if (!*data) 152 return -EINVAL; 153 154 status = acpi_get_data(handle, acpi_bus_private_data_handler, data); 155 if (ACPI_FAILURE(status) || !*data) { 156 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", 157 handle)); 158 return -ENODEV; 159 } 160 161 return 0; 162 } 163 EXPORT_SYMBOL(acpi_bus_get_private_data); 164 165 /* -------------------------------------------------------------------------- 166 Power Management 167 -------------------------------------------------------------------------- */ 168 169 int acpi_bus_get_power(acpi_handle handle, int *state) 170 { 171 int result = 0; 172 acpi_status status = 0; 173 struct acpi_device *device = NULL; 174 unsigned long long psc = 0; 175 176 177 result = acpi_bus_get_device(handle, &device); 178 if (result) 179 return result; 180 181 *state = ACPI_STATE_UNKNOWN; 182 183 if (!device->flags.power_manageable) { 184 /* TBD: Non-recursive algorithm for walking up hierarchy */ 185 if (device->parent) 186 *state = device->parent->power.state; 187 else 188 *state = ACPI_STATE_D0; 189 } else { 190 /* 191 * Get the device's power state either directly (via _PSC) or 192 * indirectly (via power resources). 193 */ 194 if (device->power.flags.power_resources) { 195 result = acpi_power_get_inferred_state(device); 196 if (result) 197 return result; 198 } else if (device->power.flags.explicit_get) { 199 status = acpi_evaluate_integer(device->handle, "_PSC", 200 NULL, &psc); 201 if (ACPI_FAILURE(status)) 202 return -ENODEV; 203 device->power.state = (int)psc; 204 } 205 206 *state = device->power.state; 207 } 208 209 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", 210 device->pnp.bus_id, device->power.state)); 211 212 return 0; 213 } 214 215 EXPORT_SYMBOL(acpi_bus_get_power); 216 217 int acpi_bus_set_power(acpi_handle handle, int state) 218 { 219 int result = 0; 220 acpi_status status = AE_OK; 221 struct acpi_device *device = NULL; 222 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; 223 224 225 result = acpi_bus_get_device(handle, &device); 226 if (result) 227 return result; 228 229 if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) 230 return -EINVAL; 231 232 /* Make sure this is a valid target state */ 233 234 if (!device->flags.power_manageable) { 235 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", 236 kobject_name(&device->dev.kobj))); 237 return -ENODEV; 238 } 239 /* 240 * Get device's current power state 241 */ 242 if (!acpi_power_nocheck) { 243 /* 244 * Maybe the incorrect power state is returned on the bogus 245 * bios, which is different with the real power state. 246 * For example: the bios returns D0 state and the real power 247 * state is D3. OS expects to set the device to D0 state. In 248 * such case if OS uses the power state returned by the BIOS, 249 * the device can't be transisted to the correct power state. 250 * So if the acpi_power_nocheck is set, it is unnecessary to 251 * get the power state by calling acpi_bus_get_power. 252 */ 253 acpi_bus_get_power(device->handle, &device->power.state); 254 } 255 if ((state == device->power.state) && !device->flags.force_power_state) { 256 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", 257 state)); 258 return 0; 259 } 260 261 if (!device->power.states[state].flags.valid) { 262 printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); 263 return -ENODEV; 264 } 265 if (device->parent && (state < device->parent->power.state)) { 266 printk(KERN_WARNING PREFIX 267 "Cannot set device to a higher-powered" 268 " state than parent\n"); 269 return -ENODEV; 270 } 271 272 /* 273 * Transition Power 274 * ---------------- 275 * On transitions to a high-powered state we first apply power (via 276 * power resources) then evalute _PSx. Conversly for transitions to 277 * a lower-powered state. 278 */ 279 if (state < device->power.state) { 280 if (device->power.flags.power_resources) { 281 result = acpi_power_transition(device, state); 282 if (result) 283 goto end; 284 } 285 if (device->power.states[state].flags.explicit_set) { 286 status = acpi_evaluate_object(device->handle, 287 object_name, NULL, NULL); 288 if (ACPI_FAILURE(status)) { 289 result = -ENODEV; 290 goto end; 291 } 292 } 293 } else { 294 if (device->power.states[state].flags.explicit_set) { 295 status = acpi_evaluate_object(device->handle, 296 object_name, NULL, NULL); 297 if (ACPI_FAILURE(status)) { 298 result = -ENODEV; 299 goto end; 300 } 301 } 302 if (device->power.flags.power_resources) { 303 result = acpi_power_transition(device, state); 304 if (result) 305 goto end; 306 } 307 } 308 309 end: 310 if (result) 311 printk(KERN_WARNING PREFIX 312 "Device [%s] failed to transition to D%d\n", 313 device->pnp.bus_id, state); 314 else { 315 device->power.state = state; 316 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 317 "Device [%s] transitioned to D%d\n", 318 device->pnp.bus_id, state)); 319 } 320 321 return result; 322 } 323 324 EXPORT_SYMBOL(acpi_bus_set_power); 325 326 bool acpi_bus_power_manageable(acpi_handle handle) 327 { 328 struct acpi_device *device; 329 int result; 330 331 result = acpi_bus_get_device(handle, &device); 332 return result ? false : device->flags.power_manageable; 333 } 334 335 EXPORT_SYMBOL(acpi_bus_power_manageable); 336 337 bool acpi_bus_can_wakeup(acpi_handle handle) 338 { 339 struct acpi_device *device; 340 int result; 341 342 result = acpi_bus_get_device(handle, &device); 343 return result ? false : device->wakeup.flags.valid; 344 } 345 346 EXPORT_SYMBOL(acpi_bus_can_wakeup); 347 348 static void acpi_print_osc_error(acpi_handle handle, 349 struct acpi_osc_context *context, char *error) 350 { 351 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; 352 int i; 353 354 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) 355 printk(KERN_DEBUG "%s\n", error); 356 else { 357 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); 358 kfree(buffer.pointer); 359 } 360 printk(KERN_DEBUG"_OSC request data:"); 361 for (i = 0; i < context->cap.length; i += sizeof(u32)) 362 printk("%x ", *((u32 *)(context->cap.pointer + i))); 363 printk("\n"); 364 } 365 366 static u8 hex_val(unsigned char c) 367 { 368 return isdigit(c) ? c - '0' : toupper(c) - 'A' + 10; 369 } 370 371 static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) 372 { 373 int i; 374 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, 375 24, 26, 28, 30, 32, 34}; 376 377 if (strlen(str) != 36) 378 return AE_BAD_PARAMETER; 379 for (i = 0; i < 36; i++) { 380 if (i == 8 || i == 13 || i == 18 || i == 23) { 381 if (str[i] != '-') 382 return AE_BAD_PARAMETER; 383 } else if (!isxdigit(str[i])) 384 return AE_BAD_PARAMETER; 385 } 386 for (i = 0; i < 16; i++) { 387 uuid[i] = hex_val(str[opc_map_to_uuid[i]]) << 4; 388 uuid[i] |= hex_val(str[opc_map_to_uuid[i] + 1]); 389 } 390 return AE_OK; 391 } 392 393 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) 394 { 395 acpi_status status; 396 struct acpi_object_list input; 397 union acpi_object in_params[4]; 398 union acpi_object *out_obj; 399 u8 uuid[16]; 400 u32 errors; 401 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; 402 403 if (!context) 404 return AE_ERROR; 405 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) 406 return AE_ERROR; 407 context->ret.length = ACPI_ALLOCATE_BUFFER; 408 context->ret.pointer = NULL; 409 410 /* Setting up input parameters */ 411 input.count = 4; 412 input.pointer = in_params; 413 in_params[0].type = ACPI_TYPE_BUFFER; 414 in_params[0].buffer.length = 16; 415 in_params[0].buffer.pointer = uuid; 416 in_params[1].type = ACPI_TYPE_INTEGER; 417 in_params[1].integer.value = context->rev; 418 in_params[2].type = ACPI_TYPE_INTEGER; 419 in_params[2].integer.value = context->cap.length/sizeof(u32); 420 in_params[3].type = ACPI_TYPE_BUFFER; 421 in_params[3].buffer.length = context->cap.length; 422 in_params[3].buffer.pointer = context->cap.pointer; 423 424 status = acpi_evaluate_object(handle, "_OSC", &input, &output); 425 if (ACPI_FAILURE(status)) 426 return status; 427 428 if (!output.length) 429 return AE_NULL_OBJECT; 430 431 out_obj = output.pointer; 432 if (out_obj->type != ACPI_TYPE_BUFFER 433 || out_obj->buffer.length != context->cap.length) { 434 acpi_print_osc_error(handle, context, 435 "_OSC evaluation returned wrong type"); 436 status = AE_TYPE; 437 goto out_kfree; 438 } 439 /* Need to ignore the bit0 in result code */ 440 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); 441 if (errors) { 442 if (errors & OSC_REQUEST_ERROR) 443 acpi_print_osc_error(handle, context, 444 "_OSC request failed"); 445 if (errors & OSC_INVALID_UUID_ERROR) 446 acpi_print_osc_error(handle, context, 447 "_OSC invalid UUID"); 448 if (errors & OSC_INVALID_REVISION_ERROR) 449 acpi_print_osc_error(handle, context, 450 "_OSC invalid revision"); 451 if (errors & OSC_CAPABILITIES_MASK_ERROR) { 452 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] 453 & OSC_QUERY_ENABLE) 454 goto out_success; 455 status = AE_SUPPORT; 456 goto out_kfree; 457 } 458 status = AE_ERROR; 459 goto out_kfree; 460 } 461 out_success: 462 context->ret.length = out_obj->buffer.length; 463 context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); 464 if (!context->ret.pointer) { 465 status = AE_NO_MEMORY; 466 goto out_kfree; 467 } 468 memcpy(context->ret.pointer, out_obj->buffer.pointer, 469 context->ret.length); 470 status = AE_OK; 471 472 out_kfree: 473 kfree(output.pointer); 474 if (status != AE_OK) 475 context->ret.pointer = NULL; 476 return status; 477 } 478 EXPORT_SYMBOL(acpi_run_osc); 479 480 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; 481 static void acpi_bus_osc_support(void) 482 { 483 u32 capbuf[2]; 484 struct acpi_osc_context context = { 485 .uuid_str = sb_uuid_str, 486 .rev = 1, 487 .cap.length = 8, 488 .cap.pointer = capbuf, 489 }; 490 acpi_handle handle; 491 492 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; 493 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ 494 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ 495 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) 496 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; 497 #endif 498 499 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) 500 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; 501 #endif 502 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) 503 return; 504 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) 505 kfree(context.ret.pointer); 506 /* do we need to check the returned cap? Sounds no */ 507 } 508 509 /* -------------------------------------------------------------------------- 510 Event Management 511 -------------------------------------------------------------------------- */ 512 513 #ifdef CONFIG_ACPI_PROC_EVENT 514 static DEFINE_SPINLOCK(acpi_bus_event_lock); 515 516 LIST_HEAD(acpi_bus_event_list); 517 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); 518 519 extern int event_is_open; 520 521 int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) 522 { 523 struct acpi_bus_event *event; 524 unsigned long flags = 0; 525 526 /* drop event on the floor if no one's listening */ 527 if (!event_is_open) 528 return 0; 529 530 event = kmalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); 531 if (!event) 532 return -ENOMEM; 533 534 strcpy(event->device_class, device_class); 535 strcpy(event->bus_id, bus_id); 536 event->type = type; 537 event->data = data; 538 539 spin_lock_irqsave(&acpi_bus_event_lock, flags); 540 list_add_tail(&event->node, &acpi_bus_event_list); 541 spin_unlock_irqrestore(&acpi_bus_event_lock, flags); 542 543 wake_up_interruptible(&acpi_bus_event_queue); 544 545 return 0; 546 547 } 548 549 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); 550 551 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) 552 { 553 if (!device) 554 return -EINVAL; 555 return acpi_bus_generate_proc_event4(device->pnp.device_class, 556 device->pnp.bus_id, type, data); 557 } 558 559 EXPORT_SYMBOL(acpi_bus_generate_proc_event); 560 561 int acpi_bus_receive_event(struct acpi_bus_event *event) 562 { 563 unsigned long flags = 0; 564 struct acpi_bus_event *entry = NULL; 565 566 DECLARE_WAITQUEUE(wait, current); 567 568 569 if (!event) 570 return -EINVAL; 571 572 if (list_empty(&acpi_bus_event_list)) { 573 574 set_current_state(TASK_INTERRUPTIBLE); 575 add_wait_queue(&acpi_bus_event_queue, &wait); 576 577 if (list_empty(&acpi_bus_event_list)) 578 schedule(); 579 580 remove_wait_queue(&acpi_bus_event_queue, &wait); 581 set_current_state(TASK_RUNNING); 582 583 if (signal_pending(current)) 584 return -ERESTARTSYS; 585 } 586 587 spin_lock_irqsave(&acpi_bus_event_lock, flags); 588 if (!list_empty(&acpi_bus_event_list)) { 589 entry = list_entry(acpi_bus_event_list.next, 590 struct acpi_bus_event, node); 591 list_del(&entry->node); 592 } 593 spin_unlock_irqrestore(&acpi_bus_event_lock, flags); 594 595 if (!entry) 596 return -ENODEV; 597 598 memcpy(event, entry, sizeof(struct acpi_bus_event)); 599 600 kfree(entry); 601 602 return 0; 603 } 604 605 #endif /* CONFIG_ACPI_PROC_EVENT */ 606 607 /* -------------------------------------------------------------------------- 608 Notification Handling 609 -------------------------------------------------------------------------- */ 610 611 static void acpi_bus_check_device(acpi_handle handle) 612 { 613 struct acpi_device *device; 614 acpi_status status; 615 struct acpi_device_status old_status; 616 617 if (acpi_bus_get_device(handle, &device)) 618 return; 619 if (!device) 620 return; 621 622 old_status = device->status; 623 624 /* 625 * Make sure this device's parent is present before we go about 626 * messing with the device. 627 */ 628 if (device->parent && !device->parent->status.present) { 629 device->status = device->parent->status; 630 return; 631 } 632 633 status = acpi_bus_get_status(device); 634 if (ACPI_FAILURE(status)) 635 return; 636 637 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) 638 return; 639 640 /* 641 * Device Insertion/Removal 642 */ 643 if ((device->status.present) && !(old_status.present)) { 644 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); 645 /* TBD: Handle device insertion */ 646 } else if (!(device->status.present) && (old_status.present)) { 647 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); 648 /* TBD: Handle device removal */ 649 } 650 } 651 652 static void acpi_bus_check_scope(acpi_handle handle) 653 { 654 /* Status Change? */ 655 acpi_bus_check_device(handle); 656 657 /* 658 * TBD: Enumerate child devices within this device's scope and 659 * run acpi_bus_check_device()'s on them. 660 */ 661 } 662 663 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); 664 int register_acpi_bus_notifier(struct notifier_block *nb) 665 { 666 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); 667 } 668 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); 669 670 void unregister_acpi_bus_notifier(struct notifier_block *nb) 671 { 672 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); 673 } 674 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); 675 676 /** 677 * acpi_bus_notify 678 * --------------- 679 * Callback for all 'system-level' device notifications (values 0x00-0x7F). 680 */ 681 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) 682 { 683 struct acpi_device *device = NULL; 684 struct acpi_driver *driver; 685 686 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", 687 type, handle)); 688 689 blocking_notifier_call_chain(&acpi_bus_notify_list, 690 type, (void *)handle); 691 692 switch (type) { 693 694 case ACPI_NOTIFY_BUS_CHECK: 695 acpi_bus_check_scope(handle); 696 /* 697 * TBD: We'll need to outsource certain events to non-ACPI 698 * drivers via the device manager (device.c). 699 */ 700 break; 701 702 case ACPI_NOTIFY_DEVICE_CHECK: 703 acpi_bus_check_device(handle); 704 /* 705 * TBD: We'll need to outsource certain events to non-ACPI 706 * drivers via the device manager (device.c). 707 */ 708 break; 709 710 case ACPI_NOTIFY_DEVICE_WAKE: 711 /* TBD */ 712 break; 713 714 case ACPI_NOTIFY_EJECT_REQUEST: 715 /* TBD */ 716 break; 717 718 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: 719 /* TBD: Exactly what does 'light' mean? */ 720 break; 721 722 case ACPI_NOTIFY_FREQUENCY_MISMATCH: 723 /* TBD */ 724 break; 725 726 case ACPI_NOTIFY_BUS_MODE_MISMATCH: 727 /* TBD */ 728 break; 729 730 case ACPI_NOTIFY_POWER_FAULT: 731 /* TBD */ 732 break; 733 734 default: 735 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 736 "Received unknown/unsupported notification [%08x]\n", 737 type)); 738 break; 739 } 740 741 acpi_bus_get_device(handle, &device); 742 if (device) { 743 driver = device->driver; 744 if (driver && driver->ops.notify && 745 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) 746 driver->ops.notify(device, type); 747 } 748 } 749 750 /* -------------------------------------------------------------------------- 751 Initialization/Cleanup 752 -------------------------------------------------------------------------- */ 753 754 static int __init acpi_bus_init_irq(void) 755 { 756 acpi_status status = AE_OK; 757 union acpi_object arg = { ACPI_TYPE_INTEGER }; 758 struct acpi_object_list arg_list = { 1, &arg }; 759 char *message = NULL; 760 761 762 /* 763 * Let the system know what interrupt model we are using by 764 * evaluating the \_PIC object, if exists. 765 */ 766 767 switch (acpi_irq_model) { 768 case ACPI_IRQ_MODEL_PIC: 769 message = "PIC"; 770 break; 771 case ACPI_IRQ_MODEL_IOAPIC: 772 message = "IOAPIC"; 773 break; 774 case ACPI_IRQ_MODEL_IOSAPIC: 775 message = "IOSAPIC"; 776 break; 777 case ACPI_IRQ_MODEL_PLATFORM: 778 message = "platform specific model"; 779 break; 780 default: 781 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); 782 return -ENODEV; 783 } 784 785 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); 786 787 arg.integer.value = acpi_irq_model; 788 789 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); 790 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { 791 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); 792 return -ENODEV; 793 } 794 795 return 0; 796 } 797 798 u8 acpi_gbl_permanent_mmap; 799 800 801 void __init acpi_early_init(void) 802 { 803 acpi_status status = AE_OK; 804 805 if (acpi_disabled) 806 return; 807 808 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); 809 810 /* enable workarounds, unless strict ACPI spec. compliance */ 811 if (!acpi_strict) 812 acpi_gbl_enable_interpreter_slack = TRUE; 813 814 acpi_gbl_permanent_mmap = 1; 815 816 status = acpi_reallocate_root_table(); 817 if (ACPI_FAILURE(status)) { 818 printk(KERN_ERR PREFIX 819 "Unable to reallocate ACPI tables\n"); 820 goto error0; 821 } 822 823 status = acpi_initialize_subsystem(); 824 if (ACPI_FAILURE(status)) { 825 printk(KERN_ERR PREFIX 826 "Unable to initialize the ACPI Interpreter\n"); 827 goto error0; 828 } 829 830 status = acpi_load_tables(); 831 if (ACPI_FAILURE(status)) { 832 printk(KERN_ERR PREFIX 833 "Unable to load the System Description Tables\n"); 834 goto error0; 835 } 836 837 #ifdef CONFIG_X86 838 if (!acpi_ioapic) { 839 /* compatible (0) means level (3) */ 840 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { 841 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; 842 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; 843 } 844 /* Set PIC-mode SCI trigger type */ 845 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, 846 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 847 } else { 848 /* 849 * now that acpi_gbl_FADT is initialized, 850 * update it with result from INT_SRC_OVR parsing 851 */ 852 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; 853 } 854 #endif 855 856 status = 857 acpi_enable_subsystem(~ 858 (ACPI_NO_HARDWARE_INIT | 859 ACPI_NO_ACPI_ENABLE)); 860 if (ACPI_FAILURE(status)) { 861 printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); 862 goto error0; 863 } 864 865 return; 866 867 error0: 868 disable_acpi(); 869 return; 870 } 871 872 static int __init acpi_bus_init(void) 873 { 874 int result = 0; 875 acpi_status status = AE_OK; 876 extern acpi_status acpi_os_initialize1(void); 877 878 acpi_os_initialize1(); 879 880 status = 881 acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); 882 if (ACPI_FAILURE(status)) { 883 printk(KERN_ERR PREFIX 884 "Unable to start the ACPI Interpreter\n"); 885 goto error1; 886 } 887 888 /* 889 * ACPI 2.0 requires the EC driver to be loaded and work before 890 * the EC device is found in the namespace (i.e. before acpi_initialize_objects() 891 * is called). 892 * 893 * This is accomplished by looking for the ECDT table, and getting 894 * the EC parameters out of that. 895 */ 896 status = acpi_ec_ecdt_probe(); 897 /* Ignore result. Not having an ECDT is not fatal. */ 898 899 acpi_bus_osc_support(); 900 901 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); 902 if (ACPI_FAILURE(status)) { 903 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); 904 goto error1; 905 } 906 907 acpi_early_processor_set_pdc(); 908 909 /* 910 * Maybe EC region is required at bus_scan/acpi_get_devices. So it 911 * is necessary to enable it as early as possible. 912 */ 913 acpi_boot_ec_enable(); 914 915 printk(KERN_INFO PREFIX "Interpreter enabled\n"); 916 917 /* Initialize sleep structures */ 918 acpi_sleep_init(); 919 920 /* 921 * Get the system interrupt model and evaluate \_PIC. 922 */ 923 result = acpi_bus_init_irq(); 924 if (result) 925 goto error1; 926 927 /* 928 * Register the for all standard device notifications. 929 */ 930 status = 931 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, 932 &acpi_bus_notify, NULL); 933 if (ACPI_FAILURE(status)) { 934 printk(KERN_ERR PREFIX 935 "Unable to register for device notifications\n"); 936 goto error1; 937 } 938 939 /* 940 * Create the top ACPI proc directory 941 */ 942 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); 943 944 return 0; 945 946 /* Mimic structured exception handling */ 947 error1: 948 acpi_terminate(); 949 return -ENODEV; 950 } 951 952 struct kobject *acpi_kobj; 953 954 static int __init acpi_init(void) 955 { 956 int result = 0; 957 958 959 if (acpi_disabled) { 960 printk(KERN_INFO PREFIX "Interpreter disabled.\n"); 961 return -ENODEV; 962 } 963 964 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); 965 if (!acpi_kobj) { 966 printk(KERN_WARNING "%s: kset create error\n", __func__); 967 acpi_kobj = NULL; 968 } 969 970 init_acpi_device_notify(); 971 result = acpi_bus_init(); 972 973 if (!result) { 974 pci_mmcfg_late_init(); 975 if (!(pm_flags & PM_APM)) 976 pm_flags |= PM_ACPI; 977 else { 978 printk(KERN_INFO PREFIX 979 "APM is already active, exiting\n"); 980 disable_acpi(); 981 result = -ENODEV; 982 } 983 } else 984 disable_acpi(); 985 986 if (acpi_disabled) 987 return result; 988 989 /* 990 * If the laptop falls into the DMI check table, the power state check 991 * will be disabled in the course of device power transistion. 992 */ 993 dmi_check_system(power_nocheck_dmi_table); 994 995 acpi_scan_init(); 996 acpi_ec_init(); 997 acpi_power_init(); 998 acpi_system_init(); 999 acpi_debug_init(); 1000 acpi_sleep_proc_init(); 1001 acpi_wakeup_device_init(); 1002 return result; 1003 } 1004 1005 subsys_initcall(acpi_init); 1006