drivers/acpi/bus.c

   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 #include <linux/regulator/machine.h>
  37 #ifdef CONFIG_X86
  38 #include <asm/mpspec.h>
  39 #endif
  40 #include <linux/pci.h>
  41 #include <acpi/acpi_bus.h>
  42 #include <acpi/acpi_drivers.h>
  43 #include <acpi/apei.h>
  44 #include <linux/dmi.h>
  45 #include <linux/suspend.h>
  46
  47 #include "internal.h"
  48
  49 #define _COMPONENT              ACPI_BUS_COMPONENT
  50 ACPI_MODULE_NAME("bus");
  51
  52 struct acpi_device *acpi_root;
  53 struct proc_dir_entry *acpi_root_dir;
  54 EXPORT_SYMBOL(acpi_root_dir);
  55
  56 #define STRUCT_TO_INT(s)        (*((int*)&s))
  57
  58
  59 #ifdef CONFIG_X86
  60 #ifdef CONFIG_ACPI_CUSTOM_DSDT
  61 static inline int set_copy_dsdt(const struct dmi_system_id *id)
  62 {
  63         return 0;
  64 }
  65 #else
  66 static int set_copy_dsdt(const struct dmi_system_id *id)
  67 {
  68         printk(KERN_NOTICE "%s detected - "
  69                 "force copy of DSDT to local memory\n", id->ident);
  70         acpi_gbl_copy_dsdt_locally = 1;
  71         return 0;
  72 }
  73 #endif
  74
  75 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
  76         /*
  77          * Invoke DSDT corruption work-around on all Toshiba Satellite.
  78          * https://bugzilla.kernel.org/show_bug.cgi?id=14679
  79          */
  80         {
  81          .callback = set_copy_dsdt,
  82          .ident = "TOSHIBA Satellite",
  83          .matches = {
  84                 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
  85                 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
  86                 },
  87         },
  88         {}
  89 };
  90 #else
  91 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
  92         {}
  93 };
  94 #endif
  95
  96 /* --------------------------------------------------------------------------
  97                                 Device Management
  98    -------------------------------------------------------------------------- */
  99
 100 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 101                                        unsigned long long *sta)
 102 {
 103         acpi_status status;
 104
 105         status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
 106         if (ACPI_SUCCESS(status))
 107                 return AE_OK;
 108
 109         if (status == AE_NOT_FOUND) {
 110                 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
 111                        ACPI_STA_DEVICE_UI      | ACPI_STA_DEVICE_FUNCTIONING;
 112                 return AE_OK;
 113         }
 114         return status;
 115 }
 116
 117 int acpi_bus_get_status(struct acpi_device *device)
 118 {
 119         acpi_status status;
 120         unsigned long long sta;
 121
 122         status = acpi_bus_get_status_handle(device->handle, &sta);
 123         if (ACPI_FAILURE(status))
 124                 return -ENODEV;
 125
 126         STRUCT_TO_INT(device->status) = (int) sta;
 127
 128         if (device->status.functional && !device->status.present) {
 129                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
 130                        "functional but not present;\n",
 131                         device->pnp.bus_id,
 132                         (u32) STRUCT_TO_INT(device->status)));
 133         }
 134
 135         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
 136                           device->pnp.bus_id,
 137                           (u32) STRUCT_TO_INT(device->status)));
 138         return 0;
 139 }
 140 EXPORT_SYMBOL(acpi_bus_get_status);
 141
 142 void acpi_bus_private_data_handler(acpi_handle handle,
 143                                    void *context)
 144 {
 145         return;
 146 }
 147 EXPORT_SYMBOL(acpi_bus_private_data_handler);
 148
 149 int acpi_bus_get_private_data(acpi_handle handle, void **data)
 150 {
 151         acpi_status status;
 152
 153         if (!*data)
 154                 return -EINVAL;
 155
 156         status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
 157         if (ACPI_FAILURE(status) || !*data) {
 158                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
 159                                 handle));
 160                 return -ENODEV;
 161         }
 162
 163         return 0;
 164 }
 165 EXPORT_SYMBOL(acpi_bus_get_private_data);
 166
 167 void acpi_bus_no_hotplug(acpi_handle handle)
 168 {
 169         struct acpi_device *adev = NULL;
 170
 171         acpi_bus_get_device(handle, &adev);
 172         if (adev)
 173                 adev->flags.no_hotplug = true;
 174 }
 175 EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug);
 176
 177 static void acpi_print_osc_error(acpi_handle handle,
 178         struct acpi_osc_context *context, char *error)
 179 {
 180         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
 181         int i;
 182
 183         if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
 184                 printk(KERN_DEBUG "%s\n", error);
 185         else {
 186                 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
 187                 kfree(buffer.pointer);
 188         }
 189         printk(KERN_DEBUG"_OSC request data:");
 190         for (i = 0; i < context->cap.length; i += sizeof(u32))
 191                 printk("%x ", *((u32 *)(context->cap.pointer + i)));
 192         printk("\n");
 193 }
 194
 195 static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
 196 {
 197         int i;
 198         static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
 199                 24, 26, 28, 30, 32, 34};
 200
 201         if (strlen(str) != 36)
 202                 return AE_BAD_PARAMETER;
 203         for (i = 0; i < 36; i++) {
 204                 if (i == 8 || i == 13 || i == 18 || i == 23) {
 205                         if (str[i] != '-')
 206                                 return AE_BAD_PARAMETER;
 207                 } else if (!isxdigit(str[i]))
 208                         return AE_BAD_PARAMETER;
 209         }
 210         for (i = 0; i < 16; i++) {
 211                 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
 212                 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
 213         }
 214         return AE_OK;
 215 }
 216
 217 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
 218 {
 219         acpi_status status;
 220         struct acpi_object_list input;
 221         union acpi_object in_params[4];
 222         union acpi_object *out_obj;
 223         u8 uuid[16];
 224         u32 errors;
 225         struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
 226
 227         if (!context)
 228                 return AE_ERROR;
 229         if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
 230                 return AE_ERROR;
 231         context->ret.length = ACPI_ALLOCATE_BUFFER;
 232         context->ret.pointer = NULL;
 233
 234         /* Setting up input parameters */
 235         input.count = 4;
 236         input.pointer = in_params;
 237         in_params[0].type               = ACPI_TYPE_BUFFER;
 238         in_params[0].buffer.length      = 16;
 239         in_params[0].buffer.pointer     = uuid;
 240         in_params[1].type               = ACPI_TYPE_INTEGER;
 241         in_params[1].integer.value      = context->rev;
 242         in_params[2].type               = ACPI_TYPE_INTEGER;
 243         in_params[2].integer.value      = context->cap.length/sizeof(u32);
 244         in_params[3].type               = ACPI_TYPE_BUFFER;
 245         in_params[3].buffer.length      = context->cap.length;
 246         in_params[3].buffer.pointer     = context->cap.pointer;
 247
 248         status = acpi_evaluate_object(handle, "_OSC", &input, &output);
 249         if (ACPI_FAILURE(status))
 250                 return status;
 251
 252         if (!output.length)
 253                 return AE_NULL_OBJECT;
 254
 255         out_obj = output.pointer;
 256         if (out_obj->type != ACPI_TYPE_BUFFER
 257                 || out_obj->buffer.length != context->cap.length) {
 258                 acpi_print_osc_error(handle, context,
 259                         "_OSC evaluation returned wrong type");
 260                 status = AE_TYPE;
 261                 goto out_kfree;
 262         }
 263         /* Need to ignore the bit0 in result code */
 264         errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
 265         if (errors) {
 266                 if (errors & OSC_REQUEST_ERROR)
 267                         acpi_print_osc_error(handle, context,
 268                                 "_OSC request failed");
 269                 if (errors & OSC_INVALID_UUID_ERROR)
 270                         acpi_print_osc_error(handle, context,
 271                                 "_OSC invalid UUID");
 272                 if (errors & OSC_INVALID_REVISION_ERROR)
 273                         acpi_print_osc_error(handle, context,
 274                                 "_OSC invalid revision");
 275                 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
 276                         if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
 277                             & OSC_QUERY_ENABLE)
 278                                 goto out_success;
 279                         status = AE_SUPPORT;
 280                         goto out_kfree;
 281                 }
 282                 status = AE_ERROR;
 283                 goto out_kfree;
 284         }
 285 out_success:
 286         context->ret.length = out_obj->buffer.length;
 287         context->ret.pointer = kmemdup(out_obj->buffer.pointer,
 288                                        context->ret.length, GFP_KERNEL);
 289         if (!context->ret.pointer) {
 290                 status =  AE_NO_MEMORY;
 291                 goto out_kfree;
 292         }
 293         status =  AE_OK;
 294
 295 out_kfree:
 296         kfree(output.pointer);
 297         if (status != AE_OK)
 298                 context->ret.pointer = NULL;
 299         return status;
 300 }
 301 EXPORT_SYMBOL(acpi_run_osc);
 302
 303 bool osc_sb_apei_support_acked;
 304 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
 305 static void acpi_bus_osc_support(void)
 306 {
 307         u32 capbuf[2];
 308         struct acpi_osc_context context = {
 309                 .uuid_str = sb_uuid_str,
 310                 .rev = 1,
 311                 .cap.length = 8,
 312                 .cap.pointer = capbuf,
 313         };
 314         acpi_handle handle;
 315
 316         capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
 317         capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
 318 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
 319                         defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
 320         capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
 321 #endif
 322
 323 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
 324         capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
 325 #endif
 326
 327 #ifdef ACPI_HOTPLUG_OST
 328         capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT;
 329 #endif
 330
 331         if (!ghes_disable)
 332                 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
 333         if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
 334                 return;
 335         if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
 336                 u32 *capbuf_ret = context.ret.pointer;
 337                 if (context.ret.length > OSC_SUPPORT_TYPE)
 338                         osc_sb_apei_support_acked =
 339                                 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
 340                 kfree(context.ret.pointer);
 341         }
 342         /* do we need to check other returned cap? Sounds no */
 343 }
 344
 345 /* --------------------------------------------------------------------------
 346                              Notification Handling
 347    -------------------------------------------------------------------------- */
 348
 349 static void acpi_bus_check_device(acpi_handle handle)
 350 {
 351         struct acpi_device *device;
 352         acpi_status status;
 353         struct acpi_device_status old_status;
 354
 355         if (acpi_bus_get_device(handle, &device))
 356                 return;
 357         if (!device)
 358                 return;
 359
 360         old_status = device->status;
 361
 362         /*
 363          * Make sure this device's parent is present before we go about
 364          * messing with the device.
 365          */
 366         if (device->parent && !device->parent->status.present) {
 367                 device->status = device->parent->status;
 368                 return;
 369         }
 370
 371         status = acpi_bus_get_status(device);
 372         if (ACPI_FAILURE(status))
 373                 return;
 374
 375         if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
 376                 return;
 377
 378         /*
 379          * Device Insertion/Removal
 380          */
 381         if ((device->status.present) && !(old_status.present)) {
 382                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
 383                 /* TBD: Handle device insertion */
 384         } else if (!(device->status.present) && (old_status.present)) {
 385                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
 386                 /* TBD: Handle device removal */
 387         }
 388 }
 389
 390 static void acpi_bus_check_scope(acpi_handle handle)
 391 {
 392         /* Status Change? */
 393         acpi_bus_check_device(handle);
 394
 395         /*
 396          * TBD: Enumerate child devices within this device's scope and
 397          *       run acpi_bus_check_device()'s on them.
 398          */
 399 }
 400
 401 /**
 402  * acpi_bus_notify
 403  * ---------------
 404  * Callback for all 'system-level' device notifications (values 0x00-0x7F).
 405  */
 406 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
 407 {
 408         struct acpi_device *device = NULL;
 409         struct acpi_driver *driver;
 410
 411         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
 412                           type, handle));
 413
 414         switch (type) {
 415
 416         case ACPI_NOTIFY_BUS_CHECK:
 417                 acpi_bus_check_scope(handle);
 418                 /*
 419                  * TBD: We'll need to outsource certain events to non-ACPI
 420                  *      drivers via the device manager (device.c).
 421                  */
 422                 break;
 423
 424         case ACPI_NOTIFY_DEVICE_CHECK:
 425                 acpi_bus_check_device(handle);
 426                 /*
 427                  * TBD: We'll need to outsource certain events to non-ACPI
 428                  *      drivers via the device manager (device.c).
 429                  */
 430                 break;
 431
 432         case ACPI_NOTIFY_DEVICE_WAKE:
 433                 /* TBD */
 434                 break;
 435
 436         case ACPI_NOTIFY_EJECT_REQUEST:
 437                 /* TBD */
 438                 break;
 439
 440         case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
 441                 /* TBD: Exactly what does 'light' mean? */
 442                 break;
 443
 444         case ACPI_NOTIFY_FREQUENCY_MISMATCH:
 445                 /* TBD */
 446                 break;
 447
 448         case ACPI_NOTIFY_BUS_MODE_MISMATCH:
 449                 /* TBD */
 450                 break;
 451
 452         case ACPI_NOTIFY_POWER_FAULT:
 453                 /* TBD */
 454                 break;
 455
 456         default:
 457                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 458                                   "Received unknown/unsupported notification [%08x]\n",
 459                                   type));
 460                 break;
 461         }
 462
 463         acpi_bus_get_device(handle, &device);
 464         if (device) {
 465                 driver = device->driver;
 466                 if (driver && driver->ops.notify &&
 467                     (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
 468                         driver->ops.notify(device, type);
 469         }
 470 }
 471
 472 /* --------------------------------------------------------------------------
 473                              Initialization/Cleanup
 474    -------------------------------------------------------------------------- */
 475
 476 static int __init acpi_bus_init_irq(void)
 477 {
 478         acpi_status status;
 479         char *message = NULL;
 480
 481
 482         /*
 483          * Let the system know what interrupt model we are using by
 484          * evaluating the \_PIC object, if exists.
 485          */
 486
 487         switch (acpi_irq_model) {
 488         case ACPI_IRQ_MODEL_PIC:
 489                 message = "PIC";
 490                 break;
 491         case ACPI_IRQ_MODEL_IOAPIC:
 492                 message = "IOAPIC";
 493                 break;
 494         case ACPI_IRQ_MODEL_IOSAPIC:
 495                 message = "IOSAPIC";
 496                 break;
 497         case ACPI_IRQ_MODEL_PLATFORM:
 498                 message = "platform specific model";
 499                 break;
 500         default:
 501                 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
 502                 return -ENODEV;
 503         }
 504
 505         printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
 506
 507         status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
 508         if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
 509                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
 510                 return -ENODEV;
 511         }
 512
 513         return 0;
 514 }
 515
 516 u8 acpi_gbl_permanent_mmap;
 517
 518
 519 void __init acpi_early_init(void)
 520 {
 521         acpi_status status;
 522
 523         if (acpi_disabled)
 524                 return;
 525
 526         printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
 527
 528         /* enable workarounds, unless strict ACPI spec. compliance */
 529         if (!acpi_strict)
 530                 acpi_gbl_enable_interpreter_slack = TRUE;
 531
 532         acpi_gbl_permanent_mmap = 1;
 533
 534         /*
 535          * If the machine falls into the DMI check table,
 536          * DSDT will be copied to memory
 537          */
 538         dmi_check_system(dsdt_dmi_table);
 539
 540         status = acpi_reallocate_root_table();
 541         if (ACPI_FAILURE(status)) {
 542                 printk(KERN_ERR PREFIX
 543                        "Unable to reallocate ACPI tables\n");
 544                 goto error0;
 545         }
 546
 547         status = acpi_initialize_subsystem();
 548         if (ACPI_FAILURE(status)) {
 549                 printk(KERN_ERR PREFIX
 550                        "Unable to initialize the ACPI Interpreter\n");
 551                 goto error0;
 552         }
 553
 554         status = acpi_load_tables();
 555         if (ACPI_FAILURE(status)) {
 556                 printk(KERN_ERR PREFIX
 557                        "Unable to load the System Description Tables\n");
 558                 goto error0;
 559         }
 560
 561 #ifdef CONFIG_X86
 562         if (!acpi_ioapic) {
 563                 /* compatible (0) means level (3) */
 564                 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
 565                         acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
 566                         acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
 567                 }
 568                 /* Set PIC-mode SCI trigger type */
 569                 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
 570                                          (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
 571         } else {
 572                 /*
 573                  * now that acpi_gbl_FADT is initialized,
 574                  * update it with result from INT_SRC_OVR parsing
 575                  */
 576                 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
 577         }
 578 #endif
 579
 580         status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
 581         if (ACPI_FAILURE(status)) {
 582                 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
 583                 goto error0;
 584         }
 585
 586         /*
 587          * If the system is using ACPI then we can be reasonably
 588          * confident that any regulators are managed by the firmware
 589          * so tell the regulator core it has everything it needs to
 590          * know.
 591          */
 592         regulator_has_full_constraints();
 593
 594         return;
 595
 596       error0:
 597         disable_acpi();
 598         return;
 599 }
 600
 601 static int __init acpi_bus_init(void)
 602 {
 603         int result;
 604         acpi_status status;
 605
 606         acpi_os_initialize1();
 607
 608         status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
 609         if (ACPI_FAILURE(status)) {
 610                 printk(KERN_ERR PREFIX
 611                        "Unable to start the ACPI Interpreter\n");
 612                 goto error1;
 613         }
 614
 615         /*
 616          * ACPI 2.0 requires the EC driver to be loaded and work before
 617          * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
 618          * is called).
 619          *
 620          * This is accomplished by looking for the ECDT table, and getting
 621          * the EC parameters out of that.
 622          */
 623         status = acpi_ec_ecdt_probe();
 624         /* Ignore result. Not having an ECDT is not fatal. */
 625
 626         status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
 627         if (ACPI_FAILURE(status)) {
 628                 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
 629                 goto error1;
 630         }
 631
 632         /*
 633          * _OSC method may exist in module level code,
 634          * so it must be run after ACPI_FULL_INITIALIZATION
 635          */
 636         acpi_bus_osc_support();
 637
 638         /*
 639          * _PDC control method may load dynamic SSDT tables,
 640          * and we need to install the table handler before that.
 641          */
 642         acpi_sysfs_init();
 643
 644         acpi_early_processor_set_pdc();
 645
 646         /*
 647          * Maybe EC region is required at bus_scan/acpi_get_devices. So it
 648          * is necessary to enable it as early as possible.
 649          */
 650         acpi_boot_ec_enable();
 651
 652         printk(KERN_INFO PREFIX "Interpreter enabled\n");
 653
 654         /* Initialize sleep structures */
 655         acpi_sleep_init();
 656
 657         /*
 658          * Get the system interrupt model and evaluate \_PIC.
 659          */
 660         result = acpi_bus_init_irq();
 661         if (result)
 662                 goto error1;
 663
 664         /*
 665          * Register the for all standard device notifications.
 666          */
 667         status =
 668             acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
 669                                         &acpi_bus_notify, NULL);
 670         if (ACPI_FAILURE(status)) {
 671                 printk(KERN_ERR PREFIX
 672                        "Unable to register for device notifications\n");
 673                 goto error1;
 674         }
 675
 676         /*
 677          * Create the top ACPI proc directory
 678          */
 679         acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
 680
 681         return 0;
 682
 683         /* Mimic structured exception handling */
 684       error1:
 685         acpi_terminate();
 686         return -ENODEV;
 687 }
 688
 689 struct kobject *acpi_kobj;
 690 EXPORT_SYMBOL_GPL(acpi_kobj);
 691
 692 static int __init acpi_init(void)
 693 {
 694         int result;
 695
 696         if (acpi_disabled) {
 697                 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
 698                 return -ENODEV;
 699         }
 700
 701         acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
 702         if (!acpi_kobj) {
 703                 printk(KERN_WARNING "%s: kset create error\n", __func__);
 704                 acpi_kobj = NULL;
 705         }
 706
 707         init_acpi_device_notify();
 708         result = acpi_bus_init();
 709         if (result) {
 710                 disable_acpi();
 711                 return result;
 712         }
 713
 714         pci_mmcfg_late_init();
 715         acpi_scan_init();
 716         acpi_ec_init();
 717         acpi_debugfs_init();
 718         acpi_sleep_proc_init();
 719         acpi_wakeup_device_init();
 720         return 0;
 721 }
 722
 723 subsys_initcall(acpi_init);