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