| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/acevents.h> |
| 46 | #include <acpi/acnamesp.h> |
| 47 | #include <acpi/actables.h> |
| 48 | |
| 49 | #define _COMPONENT ACPI_EVENTS |
| 50 | ACPI_MODULE_NAME("evxfevnt") |
| 51 | |
| 52 | /******************************************************************************* |
| 53 | * |
| 54 | * FUNCTION: acpi_enable |
| 55 | * |
| 56 | * PARAMETERS: None |
| 57 | * |
| 58 | * RETURN: Status |
| 59 | * |
| 60 | * DESCRIPTION: Transfers the system into ACPI mode. |
| 61 | * |
| 62 | ******************************************************************************/ |
| 63 | acpi_status acpi_enable(void) |
| 64 | { |
| 65 | acpi_status status = AE_OK; |
| 66 | |
| 67 | ACPI_FUNCTION_TRACE(acpi_enable); |
| 68 | |
| 69 | /* ACPI tables must be present */ |
| 70 | |
| 71 | if (!acpi_tb_tables_loaded()) { |
| 72 | return_ACPI_STATUS(AE_NO_ACPI_TABLES); |
| 73 | } |
| 74 | |
| 75 | /* Check current mode */ |
| 76 | |
| 77 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
| 78 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| 79 | "System is already in ACPI mode\n")); |
| 80 | } else { |
| 81 | /* Transition to ACPI mode */ |
| 82 | |
| 83 | status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI); |
| 84 | if (ACPI_FAILURE(status)) { |
| 85 | ACPI_ERROR((AE_INFO, |
| 86 | "Could not transition to ACPI mode")); |
| 87 | return_ACPI_STATUS(status); |
| 88 | } |
| 89 | |
| 90 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| 91 | "Transition to ACPI mode successful\n")); |
| 92 | } |
| 93 | |
| 94 | return_ACPI_STATUS(status); |
| 95 | } |
| 96 | |
| 97 | ACPI_EXPORT_SYMBOL(acpi_enable) |
| 98 | |
| 99 | /******************************************************************************* |
| 100 | * |
| 101 | * FUNCTION: acpi_disable |
| 102 | * |
| 103 | * PARAMETERS: None |
| 104 | * |
| 105 | * RETURN: Status |
| 106 | * |
| 107 | * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. |
| 108 | * |
| 109 | ******************************************************************************/ |
| 110 | acpi_status acpi_disable(void) |
| 111 | { |
| 112 | acpi_status status = AE_OK; |
| 113 | |
| 114 | ACPI_FUNCTION_TRACE(acpi_disable); |
| 115 | |
| 116 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
| 117 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| 118 | "System is already in legacy (non-ACPI) mode\n")); |
| 119 | } else { |
| 120 | /* Transition to LEGACY mode */ |
| 121 | |
| 122 | status = acpi_hw_set_mode(ACPI_SYS_MODE_LEGACY); |
| 123 | |
| 124 | if (ACPI_FAILURE(status)) { |
| 125 | ACPI_ERROR((AE_INFO, |
| 126 | "Could not exit ACPI mode to legacy mode")); |
| 127 | return_ACPI_STATUS(status); |
| 128 | } |
| 129 | |
| 130 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI mode disabled\n")); |
| 131 | } |
| 132 | |
| 133 | return_ACPI_STATUS(status); |
| 134 | } |
| 135 | |
| 136 | ACPI_EXPORT_SYMBOL(acpi_disable) |
| 137 | |
| 138 | /******************************************************************************* |
| 139 | * |
| 140 | * FUNCTION: acpi_enable_event |
| 141 | * |
| 142 | * PARAMETERS: Event - The fixed eventto be enabled |
| 143 | * Flags - Reserved |
| 144 | * |
| 145 | * RETURN: Status |
| 146 | * |
| 147 | * DESCRIPTION: Enable an ACPI event (fixed) |
| 148 | * |
| 149 | ******************************************************************************/ |
| 150 | acpi_status acpi_enable_event(u32 event, u32 flags) |
| 151 | { |
| 152 | acpi_status status = AE_OK; |
| 153 | u32 value; |
| 154 | |
| 155 | ACPI_FUNCTION_TRACE(acpi_enable_event); |
| 156 | |
| 157 | /* Decode the Fixed Event */ |
| 158 | |
| 159 | if (event > ACPI_EVENT_MAX) { |
| 160 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Enable the requested fixed event (by writing a one to the enable |
| 165 | * register bit) |
| 166 | */ |
| 167 | status = |
| 168 | acpi_set_register(acpi_gbl_fixed_event_info[event]. |
| 169 | enable_register_id, 1); |
| 170 | if (ACPI_FAILURE(status)) { |
| 171 | return_ACPI_STATUS(status); |
| 172 | } |
| 173 | |
| 174 | /* Make sure that the hardware responded */ |
| 175 | |
| 176 | status = |
| 177 | acpi_get_register(acpi_gbl_fixed_event_info[event]. |
| 178 | enable_register_id, &value); |
| 179 | if (ACPI_FAILURE(status)) { |
| 180 | return_ACPI_STATUS(status); |
| 181 | } |
| 182 | |
| 183 | if (value != 1) { |
| 184 | ACPI_ERROR((AE_INFO, |
| 185 | "Could not enable %s event", |
| 186 | acpi_ut_get_event_name(event))); |
| 187 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
| 188 | } |
| 189 | |
| 190 | return_ACPI_STATUS(status); |
| 191 | } |
| 192 | |
| 193 | ACPI_EXPORT_SYMBOL(acpi_enable_event) |
| 194 | |
| 195 | /******************************************************************************* |
| 196 | * |
| 197 | * FUNCTION: acpi_set_gpe_type |
| 198 | * |
| 199 | * PARAMETERS: gpe_device - Parent GPE Device |
| 200 | * gpe_number - GPE level within the GPE block |
| 201 | * Type - New GPE type |
| 202 | * |
| 203 | * RETURN: Status |
| 204 | * |
| 205 | * DESCRIPTION: Set the type of an individual GPE |
| 206 | * |
| 207 | ******************************************************************************/ |
| 208 | acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type) |
| 209 | { |
| 210 | acpi_status status = AE_OK; |
| 211 | struct acpi_gpe_event_info *gpe_event_info; |
| 212 | |
| 213 | ACPI_FUNCTION_TRACE(acpi_set_gpe_type); |
| 214 | |
| 215 | /* Ensure that we have a valid GPE number */ |
| 216 | |
| 217 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| 218 | if (!gpe_event_info) { |
| 219 | status = AE_BAD_PARAMETER; |
| 220 | goto unlock_and_exit; |
| 221 | } |
| 222 | |
| 223 | if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) { |
| 224 | return_ACPI_STATUS(AE_OK); |
| 225 | } |
| 226 | |
| 227 | /* Set the new type (will disable GPE if currently enabled) */ |
| 228 | |
| 229 | status = acpi_ev_set_gpe_type(gpe_event_info, type); |
| 230 | |
| 231 | unlock_and_exit: |
| 232 | return_ACPI_STATUS(status); |
| 233 | } |
| 234 | |
| 235 | ACPI_EXPORT_SYMBOL(acpi_set_gpe_type) |
| 236 | |
| 237 | /******************************************************************************* |
| 238 | * |
| 239 | * FUNCTION: acpi_enable_gpe |
| 240 | * |
| 241 | * PARAMETERS: gpe_device - Parent GPE Device |
| 242 | * gpe_number - GPE level within the GPE block |
| 243 | * Flags - Just enable, or also wake enable? |
| 244 | * Called from ISR or not |
| 245 | * |
| 246 | * RETURN: Status |
| 247 | * |
| 248 | * DESCRIPTION: Enable an ACPI event (general purpose) |
| 249 | * |
| 250 | ******************************************************************************/ |
| 251 | acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) |
| 252 | { |
| 253 | acpi_status status = AE_OK; |
| 254 | acpi_cpu_flags flags; |
| 255 | struct acpi_gpe_event_info *gpe_event_info; |
| 256 | |
| 257 | ACPI_FUNCTION_TRACE(acpi_enable_gpe); |
| 258 | |
| 259 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| 260 | |
| 261 | /* Ensure that we have a valid GPE number */ |
| 262 | |
| 263 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| 264 | if (!gpe_event_info) { |
| 265 | status = AE_BAD_PARAMETER; |
| 266 | goto unlock_and_exit; |
| 267 | } |
| 268 | |
| 269 | /* Perform the enable */ |
| 270 | |
| 271 | status = acpi_ev_enable_gpe(gpe_event_info, TRUE); |
| 272 | |
| 273 | unlock_and_exit: |
| 274 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| 275 | return_ACPI_STATUS(status); |
| 276 | } |
| 277 | |
| 278 | ACPI_EXPORT_SYMBOL(acpi_enable_gpe) |
| 279 | |
| 280 | /******************************************************************************* |
| 281 | * |
| 282 | * FUNCTION: acpi_disable_gpe |
| 283 | * |
| 284 | * PARAMETERS: gpe_device - Parent GPE Device |
| 285 | * gpe_number - GPE level within the GPE block |
| 286 | * Flags - Just disable, or also wake disable? |
| 287 | * Called from ISR or not |
| 288 | * |
| 289 | * RETURN: Status |
| 290 | * |
| 291 | * DESCRIPTION: Disable an ACPI event (general purpose) |
| 292 | * |
| 293 | ******************************************************************************/ |
| 294 | acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) |
| 295 | { |
| 296 | acpi_status status = AE_OK; |
| 297 | acpi_cpu_flags flags; |
| 298 | struct acpi_gpe_event_info *gpe_event_info; |
| 299 | |
| 300 | ACPI_FUNCTION_TRACE(acpi_disable_gpe); |
| 301 | |
| 302 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
| 303 | /* Ensure that we have a valid GPE number */ |
| 304 | |
| 305 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| 306 | if (!gpe_event_info) { |
| 307 | status = AE_BAD_PARAMETER; |
| 308 | goto unlock_and_exit; |
| 309 | } |
| 310 | |
| 311 | status = acpi_ev_disable_gpe(gpe_event_info); |
| 312 | |
| 313 | unlock_and_exit: |
| 314 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
| 315 | return_ACPI_STATUS(status); |
| 316 | } |
| 317 | |
| 318 | ACPI_EXPORT_SYMBOL(acpi_disable_gpe) |
| 319 | |
| 320 | /******************************************************************************* |
| 321 | * |
| 322 | * FUNCTION: acpi_disable_event |
| 323 | * |
| 324 | * PARAMETERS: Event - The fixed eventto be enabled |
| 325 | * Flags - Reserved |
| 326 | * |
| 327 | * RETURN: Status |
| 328 | * |
| 329 | * DESCRIPTION: Disable an ACPI event (fixed) |
| 330 | * |
| 331 | ******************************************************************************/ |
| 332 | acpi_status acpi_disable_event(u32 event, u32 flags) |
| 333 | { |
| 334 | acpi_status status = AE_OK; |
| 335 | u32 value; |
| 336 | |
| 337 | ACPI_FUNCTION_TRACE(acpi_disable_event); |
| 338 | |
| 339 | /* Decode the Fixed Event */ |
| 340 | |
| 341 | if (event > ACPI_EVENT_MAX) { |
| 342 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * Disable the requested fixed event (by writing a zero to the enable |
| 347 | * register bit) |
| 348 | */ |
| 349 | status = |
| 350 | acpi_set_register(acpi_gbl_fixed_event_info[event]. |
| 351 | enable_register_id, 0); |
| 352 | if (ACPI_FAILURE(status)) { |
| 353 | return_ACPI_STATUS(status); |
| 354 | } |
| 355 | |
| 356 | status = |
| 357 | acpi_get_register(acpi_gbl_fixed_event_info[event]. |
| 358 | enable_register_id, &value); |
| 359 | if (ACPI_FAILURE(status)) { |
| 360 | return_ACPI_STATUS(status); |
| 361 | } |
| 362 | |
| 363 | if (value != 0) { |
| 364 | ACPI_ERROR((AE_INFO, |
| 365 | "Could not disable %s events", |
| 366 | acpi_ut_get_event_name(event))); |
| 367 | return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE); |
| 368 | } |
| 369 | |
| 370 | return_ACPI_STATUS(status); |
| 371 | } |
| 372 | |
| 373 | ACPI_EXPORT_SYMBOL(acpi_disable_event) |
| 374 | |
| 375 | /******************************************************************************* |
| 376 | * |
| 377 | * FUNCTION: acpi_clear_event |
| 378 | * |
| 379 | * PARAMETERS: Event - The fixed event to be cleared |
| 380 | * |
| 381 | * RETURN: Status |
| 382 | * |
| 383 | * DESCRIPTION: Clear an ACPI event (fixed) |
| 384 | * |
| 385 | ******************************************************************************/ |
| 386 | acpi_status acpi_clear_event(u32 event) |
| 387 | { |
| 388 | acpi_status status = AE_OK; |
| 389 | |
| 390 | ACPI_FUNCTION_TRACE(acpi_clear_event); |
| 391 | |
| 392 | /* Decode the Fixed Event */ |
| 393 | |
| 394 | if (event > ACPI_EVENT_MAX) { |
| 395 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 396 | } |
| 397 | |
| 398 | /* |
| 399 | * Clear the requested fixed event (By writing a one to the status |
| 400 | * register bit) |
| 401 | */ |
| 402 | status = |
| 403 | acpi_set_register(acpi_gbl_fixed_event_info[event]. |
| 404 | status_register_id, 1); |
| 405 | |
| 406 | return_ACPI_STATUS(status); |
| 407 | } |
| 408 | |
| 409 | ACPI_EXPORT_SYMBOL(acpi_clear_event) |
| 410 | |
| 411 | /******************************************************************************* |
| 412 | * |
| 413 | * FUNCTION: acpi_clear_gpe |
| 414 | * |
| 415 | * PARAMETERS: gpe_device - Parent GPE Device |
| 416 | * gpe_number - GPE level within the GPE block |
| 417 | * Flags - Called from an ISR or not |
| 418 | * |
| 419 | * RETURN: Status |
| 420 | * |
| 421 | * DESCRIPTION: Clear an ACPI event (general purpose) |
| 422 | * |
| 423 | ******************************************************************************/ |
| 424 | acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags) |
| 425 | { |
| 426 | acpi_status status = AE_OK; |
| 427 | struct acpi_gpe_event_info *gpe_event_info; |
| 428 | |
| 429 | ACPI_FUNCTION_TRACE(acpi_clear_gpe); |
| 430 | |
| 431 | /* Use semaphore lock if not executing at interrupt level */ |
| 432 | |
| 433 | if (flags & ACPI_NOT_ISR) { |
| 434 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 435 | if (ACPI_FAILURE(status)) { |
| 436 | return_ACPI_STATUS(status); |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /* Ensure that we have a valid GPE number */ |
| 441 | |
| 442 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| 443 | if (!gpe_event_info) { |
| 444 | status = AE_BAD_PARAMETER; |
| 445 | goto unlock_and_exit; |
| 446 | } |
| 447 | |
| 448 | status = acpi_hw_clear_gpe(gpe_event_info); |
| 449 | |
| 450 | unlock_and_exit: |
| 451 | if (flags & ACPI_NOT_ISR) { |
| 452 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 453 | } |
| 454 | return_ACPI_STATUS(status); |
| 455 | } |
| 456 | |
| 457 | ACPI_EXPORT_SYMBOL(acpi_clear_gpe) |
| 458 | /******************************************************************************* |
| 459 | * |
| 460 | * FUNCTION: acpi_get_event_status |
| 461 | * |
| 462 | * PARAMETERS: Event - The fixed event |
| 463 | * event_status - Where the current status of the event will |
| 464 | * be returned |
| 465 | * |
| 466 | * RETURN: Status |
| 467 | * |
| 468 | * DESCRIPTION: Obtains and returns the current status of the event |
| 469 | * |
| 470 | ******************************************************************************/ |
| 471 | acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status) |
| 472 | { |
| 473 | acpi_status status = AE_OK; |
| 474 | u32 value; |
| 475 | |
| 476 | ACPI_FUNCTION_TRACE(acpi_get_event_status); |
| 477 | |
| 478 | if (!event_status) { |
| 479 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 480 | } |
| 481 | |
| 482 | /* Decode the Fixed Event */ |
| 483 | |
| 484 | if (event > ACPI_EVENT_MAX) { |
| 485 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 486 | } |
| 487 | |
| 488 | /* Get the status of the requested fixed event */ |
| 489 | |
| 490 | status = |
| 491 | acpi_get_register(acpi_gbl_fixed_event_info[event]. |
| 492 | enable_register_id, &value); |
| 493 | if (ACPI_FAILURE(status)) |
| 494 | return_ACPI_STATUS(status); |
| 495 | |
| 496 | *event_status = value; |
| 497 | |
| 498 | status = |
| 499 | acpi_get_register(acpi_gbl_fixed_event_info[event]. |
| 500 | status_register_id, &value); |
| 501 | if (ACPI_FAILURE(status)) |
| 502 | return_ACPI_STATUS(status); |
| 503 | |
| 504 | if (value) |
| 505 | *event_status |= ACPI_EVENT_FLAG_SET; |
| 506 | |
| 507 | if (acpi_gbl_fixed_event_handlers[event].handler) |
| 508 | *event_status |= ACPI_EVENT_FLAG_HANDLE; |
| 509 | |
| 510 | return_ACPI_STATUS(status); |
| 511 | } |
| 512 | |
| 513 | ACPI_EXPORT_SYMBOL(acpi_get_event_status) |
| 514 | |
| 515 | /******************************************************************************* |
| 516 | * |
| 517 | * FUNCTION: acpi_get_gpe_status |
| 518 | * |
| 519 | * PARAMETERS: gpe_device - Parent GPE Device |
| 520 | * gpe_number - GPE level within the GPE block |
| 521 | * Flags - Called from an ISR or not |
| 522 | * event_status - Where the current status of the event will |
| 523 | * be returned |
| 524 | * |
| 525 | * RETURN: Status |
| 526 | * |
| 527 | * DESCRIPTION: Get status of an event (general purpose) |
| 528 | * |
| 529 | ******************************************************************************/ |
| 530 | acpi_status |
| 531 | acpi_get_gpe_status(acpi_handle gpe_device, |
| 532 | u32 gpe_number, u32 flags, acpi_event_status * event_status) |
| 533 | { |
| 534 | acpi_status status = AE_OK; |
| 535 | struct acpi_gpe_event_info *gpe_event_info; |
| 536 | |
| 537 | ACPI_FUNCTION_TRACE(acpi_get_gpe_status); |
| 538 | |
| 539 | /* Use semaphore lock if not executing at interrupt level */ |
| 540 | |
| 541 | if (flags & ACPI_NOT_ISR) { |
| 542 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
| 543 | if (ACPI_FAILURE(status)) { |
| 544 | return_ACPI_STATUS(status); |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | /* Ensure that we have a valid GPE number */ |
| 549 | |
| 550 | gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
| 551 | if (!gpe_event_info) { |
| 552 | status = AE_BAD_PARAMETER; |
| 553 | goto unlock_and_exit; |
| 554 | } |
| 555 | |
| 556 | /* Obtain status on the requested GPE number */ |
| 557 | |
| 558 | status = acpi_hw_get_gpe_status(gpe_event_info, event_status); |
| 559 | |
| 560 | if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) |
| 561 | *event_status |= ACPI_EVENT_FLAG_HANDLE; |
| 562 | |
| 563 | unlock_and_exit: |
| 564 | if (flags & ACPI_NOT_ISR) { |
| 565 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
| 566 | } |
| 567 | return_ACPI_STATUS(status); |
| 568 | } |
| 569 | |
| 570 | ACPI_EXPORT_SYMBOL(acpi_get_gpe_status) |
| 571 | /******************************************************************************* |
| 572 | * |
| 573 | * FUNCTION: acpi_install_gpe_block |
| 574 | * |
| 575 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device |
| 576 | * gpe_block_address - Address and space_iD |
| 577 | * register_count - Number of GPE register pairs in the block |
| 578 | * interrupt_number - H/W interrupt for the block |
| 579 | * |
| 580 | * RETURN: Status |
| 581 | * |
| 582 | * DESCRIPTION: Create and Install a block of GPE registers |
| 583 | * |
| 584 | ******************************************************************************/ |
| 585 | acpi_status |
| 586 | acpi_install_gpe_block(acpi_handle gpe_device, |
| 587 | struct acpi_generic_address *gpe_block_address, |
| 588 | u32 register_count, u32 interrupt_number) |
| 589 | { |
| 590 | acpi_status status; |
| 591 | union acpi_operand_object *obj_desc; |
| 592 | struct acpi_namespace_node *node; |
| 593 | struct acpi_gpe_block_info *gpe_block; |
| 594 | |
| 595 | ACPI_FUNCTION_TRACE(acpi_install_gpe_block); |
| 596 | |
| 597 | if ((!gpe_device) || (!gpe_block_address) || (!register_count)) { |
| 598 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 599 | } |
| 600 | |
| 601 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 602 | if (ACPI_FAILURE(status)) { |
| 603 | return (status); |
| 604 | } |
| 605 | |
| 606 | node = acpi_ns_map_handle_to_node(gpe_device); |
| 607 | if (!node) { |
| 608 | status = AE_BAD_PARAMETER; |
| 609 | goto unlock_and_exit; |
| 610 | } |
| 611 | |
| 612 | /* |
| 613 | * For user-installed GPE Block Devices, the gpe_block_base_number |
| 614 | * is always zero |
| 615 | */ |
| 616 | status = |
| 617 | acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, |
| 618 | interrupt_number, &gpe_block); |
| 619 | if (ACPI_FAILURE(status)) { |
| 620 | goto unlock_and_exit; |
| 621 | } |
| 622 | |
| 623 | /* Run the _PRW methods and enable the GPEs */ |
| 624 | |
| 625 | status = acpi_ev_initialize_gpe_block(node, gpe_block); |
| 626 | if (ACPI_FAILURE(status)) { |
| 627 | goto unlock_and_exit; |
| 628 | } |
| 629 | |
| 630 | /* Get the device_object attached to the node */ |
| 631 | |
| 632 | obj_desc = acpi_ns_get_attached_object(node); |
| 633 | if (!obj_desc) { |
| 634 | |
| 635 | /* No object, create a new one */ |
| 636 | |
| 637 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE); |
| 638 | if (!obj_desc) { |
| 639 | status = AE_NO_MEMORY; |
| 640 | goto unlock_and_exit; |
| 641 | } |
| 642 | |
| 643 | status = |
| 644 | acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE); |
| 645 | |
| 646 | /* Remove local reference to the object */ |
| 647 | |
| 648 | acpi_ut_remove_reference(obj_desc); |
| 649 | |
| 650 | if (ACPI_FAILURE(status)) { |
| 651 | goto unlock_and_exit; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | /* Install the GPE block in the device_object */ |
| 656 | |
| 657 | obj_desc->device.gpe_block = gpe_block; |
| 658 | |
| 659 | unlock_and_exit: |
| 660 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 661 | return_ACPI_STATUS(status); |
| 662 | } |
| 663 | |
| 664 | ACPI_EXPORT_SYMBOL(acpi_install_gpe_block) |
| 665 | |
| 666 | /******************************************************************************* |
| 667 | * |
| 668 | * FUNCTION: acpi_remove_gpe_block |
| 669 | * |
| 670 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device |
| 671 | * |
| 672 | * RETURN: Status |
| 673 | * |
| 674 | * DESCRIPTION: Remove a previously installed block of GPE registers |
| 675 | * |
| 676 | ******************************************************************************/ |
| 677 | acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) |
| 678 | { |
| 679 | union acpi_operand_object *obj_desc; |
| 680 | acpi_status status; |
| 681 | struct acpi_namespace_node *node; |
| 682 | |
| 683 | ACPI_FUNCTION_TRACE(acpi_remove_gpe_block); |
| 684 | |
| 685 | if (!gpe_device) { |
| 686 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 687 | } |
| 688 | |
| 689 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 690 | if (ACPI_FAILURE(status)) { |
| 691 | return (status); |
| 692 | } |
| 693 | |
| 694 | node = acpi_ns_map_handle_to_node(gpe_device); |
| 695 | if (!node) { |
| 696 | status = AE_BAD_PARAMETER; |
| 697 | goto unlock_and_exit; |
| 698 | } |
| 699 | |
| 700 | /* Get the device_object attached to the node */ |
| 701 | |
| 702 | obj_desc = acpi_ns_get_attached_object(node); |
| 703 | if (!obj_desc || !obj_desc->device.gpe_block) { |
| 704 | return_ACPI_STATUS(AE_NULL_OBJECT); |
| 705 | } |
| 706 | |
| 707 | /* Delete the GPE block (but not the device_object) */ |
| 708 | |
| 709 | status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block); |
| 710 | if (ACPI_SUCCESS(status)) { |
| 711 | obj_desc->device.gpe_block = NULL; |
| 712 | } |
| 713 | |
| 714 | unlock_and_exit: |
| 715 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 716 | return_ACPI_STATUS(status); |
| 717 | } |
| 718 | |
| 719 | ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) |