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