Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 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 <linux/module.h> |
| 45 | |
| 46 | #include <acpi/acpi.h> |
| 47 | #include <acpi/acevents.h> |
| 48 | #include <acpi/acnamesp.h> |
| 49 | |
| 50 | #define _COMPONENT ACPI_EVENTS |
| 51 | ACPI_MODULE_NAME ("evxfevnt") |
| 52 | |
| 53 | |
| 54 | /******************************************************************************* |
| 55 | * |
| 56 | * FUNCTION: acpi_enable |
| 57 | * |
| 58 | * PARAMETERS: None |
| 59 | * |
| 60 | * RETURN: Status |
| 61 | * |
| 62 | * DESCRIPTION: Transfers the system into ACPI mode. |
| 63 | * |
| 64 | ******************************************************************************/ |
| 65 | |
| 66 | acpi_status |
| 67 | acpi_enable (void) |
| 68 | { |
| 69 | acpi_status status = AE_OK; |
| 70 | |
| 71 | |
| 72 | ACPI_FUNCTION_TRACE ("acpi_enable"); |
| 73 | |
| 74 | |
| 75 | /* Make sure we have the FADT*/ |
| 76 | |
| 77 | if (!acpi_gbl_FADT) { |
| 78 | ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n")); |
| 79 | return_ACPI_STATUS (AE_NO_ACPI_TABLES); |
| 80 | } |
| 81 | |
| 82 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) { |
| 83 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n")); |
| 84 | } |
| 85 | else { |
| 86 | /* Transition to ACPI mode */ |
| 87 | |
| 88 | status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI); |
| 89 | if (ACPI_FAILURE (status)) { |
| 90 | ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n")); |
| 91 | return_ACPI_STATUS (status); |
| 92 | } |
| 93 | |
| 94 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Transition to ACPI mode successful\n")); |
| 95 | } |
| 96 | |
| 97 | return_ACPI_STATUS (status); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | /******************************************************************************* |
| 102 | * |
| 103 | * FUNCTION: acpi_disable |
| 104 | * |
| 105 | * PARAMETERS: None |
| 106 | * |
| 107 | * RETURN: Status |
| 108 | * |
| 109 | * DESCRIPTION: Transfers the system into LEGACY mode. |
| 110 | * |
| 111 | ******************************************************************************/ |
| 112 | |
| 113 | acpi_status |
| 114 | acpi_disable (void) |
| 115 | { |
| 116 | acpi_status status = AE_OK; |
| 117 | |
| 118 | |
| 119 | ACPI_FUNCTION_TRACE ("acpi_disable"); |
| 120 | |
| 121 | |
| 122 | if (!acpi_gbl_FADT) { |
| 123 | ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n")); |
| 124 | return_ACPI_STATUS (AE_NO_ACPI_TABLES); |
| 125 | } |
| 126 | |
| 127 | if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) { |
| 128 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in legacy (non-ACPI) mode\n")); |
| 129 | } |
| 130 | else { |
| 131 | /* Transition to LEGACY mode */ |
| 132 | |
| 133 | status = acpi_hw_set_mode (ACPI_SYS_MODE_LEGACY); |
| 134 | |
| 135 | if (ACPI_FAILURE (status)) { |
| 136 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not exit ACPI mode to legacy mode")); |
| 137 | return_ACPI_STATUS (status); |
| 138 | } |
| 139 | |
| 140 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n")); |
| 141 | } |
| 142 | |
| 143 | return_ACPI_STATUS (status); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | /******************************************************************************* |
| 148 | * |
| 149 | * FUNCTION: acpi_enable_event |
| 150 | * |
| 151 | * PARAMETERS: Event - The fixed eventto be enabled |
| 152 | * Flags - Reserved |
| 153 | * |
| 154 | * RETURN: Status |
| 155 | * |
| 156 | * DESCRIPTION: Enable an ACPI event (fixed) |
| 157 | * |
| 158 | ******************************************************************************/ |
| 159 | |
| 160 | acpi_status |
| 161 | acpi_enable_event ( |
| 162 | u32 event, |
| 163 | u32 flags) |
| 164 | { |
| 165 | acpi_status status = AE_OK; |
| 166 | u32 value; |
| 167 | |
| 168 | |
| 169 | ACPI_FUNCTION_TRACE ("acpi_enable_event"); |
| 170 | |
| 171 | |
| 172 | /* Decode the Fixed Event */ |
| 173 | |
| 174 | if (event > ACPI_EVENT_MAX) { |
| 175 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * Enable the requested fixed event (by writing a one to the |
| 180 | * enable register bit) |
| 181 | */ |
| 182 | status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id, |
| 183 | 1, ACPI_MTX_LOCK); |
| 184 | if (ACPI_FAILURE (status)) { |
| 185 | return_ACPI_STATUS (status); |
| 186 | } |
| 187 | |
| 188 | /* Make sure that the hardware responded */ |
| 189 | |
| 190 | status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id, |
| 191 | &value, ACPI_MTX_LOCK); |
| 192 | if (ACPI_FAILURE (status)) { |
| 193 | return_ACPI_STATUS (status); |
| 194 | } |
| 195 | |
| 196 | if (value != 1) { |
| 197 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, |
| 198 | "Could not enable %s event\n", acpi_ut_get_event_name (event))); |
| 199 | return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); |
| 200 | } |
| 201 | |
| 202 | return_ACPI_STATUS (status); |
| 203 | } |
| 204 | EXPORT_SYMBOL(acpi_enable_event); |
| 205 | |
| 206 | |
| 207 | /******************************************************************************* |
| 208 | * |
| 209 | * FUNCTION: acpi_set_gpe_type |
| 210 | * |
| 211 | * PARAMETERS: gpe_device - Parent GPE Device |
| 212 | * gpe_number - GPE level within the GPE block |
| 213 | * Type - New GPE type |
| 214 | * |
| 215 | * RETURN: Status |
| 216 | * |
| 217 | * DESCRIPTION: Enable an ACPI event (general purpose) |
| 218 | * |
| 219 | ******************************************************************************/ |
| 220 | |
| 221 | acpi_status |
| 222 | acpi_set_gpe_type ( |
| 223 | acpi_handle gpe_device, |
| 224 | u32 gpe_number, |
| 225 | u8 type) |
| 226 | { |
| 227 | acpi_status status = AE_OK; |
| 228 | struct acpi_gpe_event_info *gpe_event_info; |
| 229 | |
| 230 | |
| 231 | ACPI_FUNCTION_TRACE ("acpi_set_gpe_type"); |
| 232 | |
| 233 | |
| 234 | /* Ensure that we have a valid GPE number */ |
| 235 | |
| 236 | gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number); |
| 237 | if (!gpe_event_info) { |
| 238 | status = AE_BAD_PARAMETER; |
| 239 | goto unlock_and_exit; |
| 240 | } |
| 241 | |
| 242 | if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) { |
| 243 | return_ACPI_STATUS (AE_OK); |
| 244 | } |
| 245 | |
| 246 | /* Set the new type (will disable GPE if currently enabled) */ |
| 247 | |
| 248 | status = acpi_ev_set_gpe_type (gpe_event_info, type); |
| 249 | |
| 250 | unlock_and_exit: |
| 251 | return_ACPI_STATUS (status); |
| 252 | } |
| 253 | EXPORT_SYMBOL(acpi_set_gpe_type); |
| 254 | |
| 255 | |
| 256 | /******************************************************************************* |
| 257 | * |
| 258 | * FUNCTION: acpi_enable_gpe |
| 259 | * |
| 260 | * PARAMETERS: gpe_device - Parent GPE Device |
| 261 | * gpe_number - GPE level within the GPE block |
| 262 | * Flags - Just enable, or also wake enable? |
| 263 | * Called from ISR or not |
| 264 | * |
| 265 | * RETURN: Status |
| 266 | * |
| 267 | * DESCRIPTION: Enable an ACPI event (general purpose) |
| 268 | * |
| 269 | ******************************************************************************/ |
| 270 | |
| 271 | acpi_status |
| 272 | acpi_enable_gpe ( |
| 273 | acpi_handle gpe_device, |
| 274 | u32 gpe_number, |
| 275 | u32 flags) |
| 276 | { |
| 277 | acpi_status status = AE_OK; |
| 278 | struct acpi_gpe_event_info *gpe_event_info; |
| 279 | |
| 280 | |
| 281 | ACPI_FUNCTION_TRACE ("acpi_enable_gpe"); |
| 282 | |
| 283 | |
| 284 | /* Use semaphore lock if not executing at interrupt level */ |
| 285 | |
| 286 | if (flags & ACPI_NOT_ISR) { |
| 287 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); |
| 288 | if (ACPI_FAILURE (status)) { |
| 289 | return_ACPI_STATUS (status); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /* Ensure that we have a valid GPE number */ |
| 294 | |
| 295 | gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number); |
| 296 | if (!gpe_event_info) { |
| 297 | status = AE_BAD_PARAMETER; |
| 298 | goto unlock_and_exit; |
| 299 | } |
| 300 | |
| 301 | /* Perform the enable */ |
| 302 | |
| 303 | status = acpi_ev_enable_gpe (gpe_event_info, TRUE); |
| 304 | |
| 305 | unlock_and_exit: |
| 306 | if (flags & ACPI_NOT_ISR) { |
| 307 | (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); |
| 308 | } |
| 309 | return_ACPI_STATUS (status); |
| 310 | } |
| 311 | EXPORT_SYMBOL(acpi_enable_gpe); |
| 312 | |
| 313 | |
| 314 | /******************************************************************************* |
| 315 | * |
| 316 | * FUNCTION: acpi_disable_gpe |
| 317 | * |
| 318 | * PARAMETERS: gpe_device - Parent GPE Device |
| 319 | * gpe_number - GPE level within the GPE block |
| 320 | * Flags - Just disable, or also wake disable? |
| 321 | * Called from ISR or not |
| 322 | * |
| 323 | * RETURN: Status |
| 324 | * |
| 325 | * DESCRIPTION: Disable an ACPI event (general purpose) |
| 326 | * |
| 327 | ******************************************************************************/ |
| 328 | |
| 329 | acpi_status |
| 330 | acpi_disable_gpe ( |
| 331 | acpi_handle gpe_device, |
| 332 | u32 gpe_number, |
| 333 | u32 flags) |
| 334 | { |
| 335 | acpi_status status = AE_OK; |
| 336 | struct acpi_gpe_event_info *gpe_event_info; |
| 337 | |
| 338 | |
| 339 | ACPI_FUNCTION_TRACE ("acpi_disable_gpe"); |
| 340 | |
| 341 | |
| 342 | /* Use semaphore lock if not executing at interrupt level */ |
| 343 | |
| 344 | if (flags & ACPI_NOT_ISR) { |
| 345 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); |
| 346 | if (ACPI_FAILURE (status)) { |
| 347 | return_ACPI_STATUS (status); |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /* Ensure that we have a valid GPE number */ |
| 352 | |
| 353 | gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number); |
| 354 | if (!gpe_event_info) { |
| 355 | status = AE_BAD_PARAMETER; |
| 356 | goto unlock_and_exit; |
| 357 | } |
| 358 | |
| 359 | status = acpi_ev_disable_gpe (gpe_event_info); |
| 360 | |
| 361 | unlock_and_exit: |
| 362 | if (flags & ACPI_NOT_ISR) { |
| 363 | (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); |
| 364 | } |
| 365 | return_ACPI_STATUS (status); |
| 366 | } |
| 367 | |
| 368 | |
| 369 | /******************************************************************************* |
| 370 | * |
| 371 | * FUNCTION: acpi_disable_event |
| 372 | * |
| 373 | * PARAMETERS: Event - The fixed eventto be enabled |
| 374 | * Flags - Reserved |
| 375 | * |
| 376 | * RETURN: Status |
| 377 | * |
| 378 | * DESCRIPTION: Disable an ACPI event (fixed) |
| 379 | * |
| 380 | ******************************************************************************/ |
| 381 | |
| 382 | acpi_status |
| 383 | acpi_disable_event ( |
| 384 | u32 event, |
| 385 | u32 flags) |
| 386 | { |
| 387 | acpi_status status = AE_OK; |
| 388 | u32 value; |
| 389 | |
| 390 | |
| 391 | ACPI_FUNCTION_TRACE ("acpi_disable_event"); |
| 392 | |
| 393 | |
| 394 | /* Decode the Fixed Event */ |
| 395 | |
| 396 | if (event > ACPI_EVENT_MAX) { |
| 397 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * Disable the requested fixed event (by writing a zero to the |
| 402 | * enable register bit) |
| 403 | */ |
| 404 | status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id, |
| 405 | 0, ACPI_MTX_LOCK); |
| 406 | if (ACPI_FAILURE (status)) { |
| 407 | return_ACPI_STATUS (status); |
| 408 | } |
| 409 | |
| 410 | status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id, |
| 411 | &value, ACPI_MTX_LOCK); |
| 412 | if (ACPI_FAILURE (status)) { |
| 413 | return_ACPI_STATUS (status); |
| 414 | } |
| 415 | |
| 416 | if (value != 0) { |
| 417 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, |
| 418 | "Could not disable %s events\n", acpi_ut_get_event_name (event))); |
| 419 | return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); |
| 420 | } |
| 421 | |
| 422 | return_ACPI_STATUS (status); |
| 423 | } |
| 424 | EXPORT_SYMBOL(acpi_disable_event); |
| 425 | |
| 426 | |
| 427 | /******************************************************************************* |
| 428 | * |
| 429 | * FUNCTION: acpi_clear_event |
| 430 | * |
| 431 | * PARAMETERS: Event - The fixed event to be cleared |
| 432 | * |
| 433 | * RETURN: Status |
| 434 | * |
| 435 | * DESCRIPTION: Clear an ACPI event (fixed) |
| 436 | * |
| 437 | ******************************************************************************/ |
| 438 | |
| 439 | acpi_status |
| 440 | acpi_clear_event ( |
| 441 | u32 event) |
| 442 | { |
| 443 | acpi_status status = AE_OK; |
| 444 | |
| 445 | |
| 446 | ACPI_FUNCTION_TRACE ("acpi_clear_event"); |
| 447 | |
| 448 | |
| 449 | /* Decode the Fixed Event */ |
| 450 | |
| 451 | if (event > ACPI_EVENT_MAX) { |
| 452 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 453 | } |
| 454 | |
| 455 | /* |
| 456 | * Clear the requested fixed event (By writing a one to the |
| 457 | * status register bit) |
| 458 | */ |
| 459 | status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id, |
| 460 | 1, ACPI_MTX_LOCK); |
| 461 | |
| 462 | return_ACPI_STATUS (status); |
| 463 | } |
| 464 | EXPORT_SYMBOL(acpi_clear_event); |
| 465 | |
| 466 | |
| 467 | /******************************************************************************* |
| 468 | * |
| 469 | * FUNCTION: acpi_clear_gpe |
| 470 | * |
| 471 | * PARAMETERS: gpe_device - Parent GPE Device |
| 472 | * gpe_number - GPE level within the GPE block |
| 473 | * Flags - Called from an ISR or not |
| 474 | * |
| 475 | * RETURN: Status |
| 476 | * |
| 477 | * DESCRIPTION: Clear an ACPI event (general purpose) |
| 478 | * |
| 479 | ******************************************************************************/ |
| 480 | |
| 481 | acpi_status |
| 482 | acpi_clear_gpe ( |
| 483 | acpi_handle gpe_device, |
| 484 | u32 gpe_number, |
| 485 | u32 flags) |
| 486 | { |
| 487 | acpi_status status = AE_OK; |
| 488 | struct acpi_gpe_event_info *gpe_event_info; |
| 489 | |
| 490 | |
| 491 | ACPI_FUNCTION_TRACE ("acpi_clear_gpe"); |
| 492 | |
| 493 | |
| 494 | /* Use semaphore lock if not executing at interrupt level */ |
| 495 | |
| 496 | if (flags & ACPI_NOT_ISR) { |
| 497 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); |
| 498 | if (ACPI_FAILURE (status)) { |
| 499 | return_ACPI_STATUS (status); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | /* Ensure that we have a valid GPE number */ |
| 504 | |
| 505 | gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number); |
| 506 | if (!gpe_event_info) { |
| 507 | status = AE_BAD_PARAMETER; |
| 508 | goto unlock_and_exit; |
| 509 | } |
| 510 | |
| 511 | status = acpi_hw_clear_gpe (gpe_event_info); |
| 512 | |
| 513 | unlock_and_exit: |
| 514 | if (flags & ACPI_NOT_ISR) { |
| 515 | (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); |
| 516 | } |
| 517 | return_ACPI_STATUS (status); |
| 518 | } |
| 519 | |
| 520 | |
| 521 | #ifdef ACPI_FUTURE_USAGE |
| 522 | |
| 523 | /******************************************************************************* |
| 524 | * |
| 525 | * FUNCTION: acpi_get_event_status |
| 526 | * |
| 527 | * PARAMETERS: Event - The fixed event |
| 528 | * Event Status - Where the current status of the event will |
| 529 | * be returned |
| 530 | * |
| 531 | * RETURN: Status |
| 532 | * |
| 533 | * DESCRIPTION: Obtains and returns the current status of the event |
| 534 | * |
| 535 | ******************************************************************************/ |
| 536 | |
| 537 | acpi_status |
| 538 | acpi_get_event_status ( |
| 539 | u32 event, |
| 540 | acpi_event_status *event_status) |
| 541 | { |
| 542 | acpi_status status = AE_OK; |
| 543 | |
| 544 | |
| 545 | ACPI_FUNCTION_TRACE ("acpi_get_event_status"); |
| 546 | |
| 547 | |
| 548 | if (!event_status) { |
| 549 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 550 | } |
| 551 | |
| 552 | /* Decode the Fixed Event */ |
| 553 | |
| 554 | if (event > ACPI_EVENT_MAX) { |
| 555 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 556 | } |
| 557 | |
| 558 | /* Get the status of the requested fixed event */ |
| 559 | |
| 560 | status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id, |
| 561 | event_status, ACPI_MTX_LOCK); |
| 562 | |
| 563 | return_ACPI_STATUS (status); |
| 564 | } |
| 565 | |
| 566 | |
| 567 | /******************************************************************************* |
| 568 | * |
| 569 | * FUNCTION: acpi_get_gpe_status |
| 570 | * |
| 571 | * PARAMETERS: gpe_device - Parent GPE Device |
| 572 | * gpe_number - GPE level within the GPE block |
| 573 | * Flags - Called from an ISR or not |
| 574 | * Event Status - Where the current status of the event will |
| 575 | * be returned |
| 576 | * |
| 577 | * RETURN: Status |
| 578 | * |
| 579 | * DESCRIPTION: Get status of an event (general purpose) |
| 580 | * |
| 581 | ******************************************************************************/ |
| 582 | |
| 583 | acpi_status |
| 584 | acpi_get_gpe_status ( |
| 585 | acpi_handle gpe_device, |
| 586 | u32 gpe_number, |
| 587 | u32 flags, |
| 588 | acpi_event_status *event_status) |
| 589 | { |
| 590 | acpi_status status = AE_OK; |
| 591 | struct acpi_gpe_event_info *gpe_event_info; |
| 592 | |
| 593 | |
| 594 | ACPI_FUNCTION_TRACE ("acpi_get_gpe_status"); |
| 595 | |
| 596 | |
| 597 | /* Use semaphore lock if not executing at interrupt level */ |
| 598 | |
| 599 | if (flags & ACPI_NOT_ISR) { |
| 600 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); |
| 601 | if (ACPI_FAILURE (status)) { |
| 602 | return_ACPI_STATUS (status); |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | /* Ensure that we have a valid GPE number */ |
| 607 | |
| 608 | gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number); |
| 609 | if (!gpe_event_info) { |
| 610 | status = AE_BAD_PARAMETER; |
| 611 | goto unlock_and_exit; |
| 612 | } |
| 613 | |
| 614 | /* Obtain status on the requested GPE number */ |
| 615 | |
| 616 | status = acpi_hw_get_gpe_status (gpe_event_info, event_status); |
| 617 | |
| 618 | unlock_and_exit: |
| 619 | if (flags & ACPI_NOT_ISR) { |
| 620 | (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS); |
| 621 | } |
| 622 | return_ACPI_STATUS (status); |
| 623 | } |
| 624 | #endif /* ACPI_FUTURE_USAGE */ |
| 625 | |
| 626 | |
| 627 | /******************************************************************************* |
| 628 | * |
| 629 | * FUNCTION: acpi_install_gpe_block |
| 630 | * |
| 631 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device |
| 632 | * gpe_block_address - Address and space_iD |
| 633 | * register_count - Number of GPE register pairs in the block |
| 634 | * interrupt_level - H/W interrupt for the block |
| 635 | * |
| 636 | * RETURN: Status |
| 637 | * |
| 638 | * DESCRIPTION: Create and Install a block of GPE registers |
| 639 | * |
| 640 | ******************************************************************************/ |
| 641 | |
| 642 | acpi_status |
| 643 | acpi_install_gpe_block ( |
| 644 | acpi_handle gpe_device, |
| 645 | struct acpi_generic_address *gpe_block_address, |
| 646 | u32 register_count, |
| 647 | u32 interrupt_level) |
| 648 | { |
| 649 | acpi_status status; |
| 650 | union acpi_operand_object *obj_desc; |
| 651 | struct acpi_namespace_node *node; |
| 652 | struct acpi_gpe_block_info *gpe_block; |
| 653 | |
| 654 | |
| 655 | ACPI_FUNCTION_TRACE ("acpi_install_gpe_block"); |
| 656 | |
| 657 | |
| 658 | if ((!gpe_device) || |
| 659 | (!gpe_block_address) || |
| 660 | (!register_count)) { |
| 661 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 662 | } |
| 663 | |
| 664 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); |
| 665 | if (ACPI_FAILURE (status)) { |
| 666 | return (status); |
| 667 | } |
| 668 | |
| 669 | node = acpi_ns_map_handle_to_node (gpe_device); |
| 670 | if (!node) { |
| 671 | status = AE_BAD_PARAMETER; |
| 672 | goto unlock_and_exit; |
| 673 | } |
| 674 | |
| 675 | /* |
| 676 | * For user-installed GPE Block Devices, the gpe_block_base_number |
| 677 | * is always zero |
| 678 | */ |
| 679 | status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count, |
| 680 | 0, interrupt_level, &gpe_block); |
| 681 | if (ACPI_FAILURE (status)) { |
| 682 | goto unlock_and_exit; |
| 683 | } |
| 684 | |
| 685 | /* Get the device_object attached to the node */ |
| 686 | |
| 687 | obj_desc = acpi_ns_get_attached_object (node); |
| 688 | if (!obj_desc) { |
| 689 | /* No object, create a new one */ |
| 690 | |
| 691 | obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE); |
| 692 | if (!obj_desc) { |
| 693 | status = AE_NO_MEMORY; |
| 694 | goto unlock_and_exit; |
| 695 | } |
| 696 | |
| 697 | status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE); |
| 698 | |
| 699 | /* Remove local reference to the object */ |
| 700 | |
| 701 | acpi_ut_remove_reference (obj_desc); |
| 702 | |
| 703 | if (ACPI_FAILURE (status)) { |
| 704 | goto unlock_and_exit; |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | /* Install the GPE block in the device_object */ |
| 709 | |
| 710 | obj_desc->device.gpe_block = gpe_block; |
| 711 | |
| 712 | |
| 713 | unlock_and_exit: |
| 714 | (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); |
| 715 | return_ACPI_STATUS (status); |
| 716 | } |
| 717 | EXPORT_SYMBOL(acpi_install_gpe_block); |
| 718 | |
| 719 | |
| 720 | /******************************************************************************* |
| 721 | * |
| 722 | * FUNCTION: acpi_remove_gpe_block |
| 723 | * |
| 724 | * PARAMETERS: gpe_device - Handle to the parent GPE Block Device |
| 725 | * |
| 726 | * RETURN: Status |
| 727 | * |
| 728 | * DESCRIPTION: Remove a previously installed block of GPE registers |
| 729 | * |
| 730 | ******************************************************************************/ |
| 731 | |
| 732 | acpi_status |
| 733 | acpi_remove_gpe_block ( |
| 734 | acpi_handle gpe_device) |
| 735 | { |
| 736 | union acpi_operand_object *obj_desc; |
| 737 | acpi_status status; |
| 738 | struct acpi_namespace_node *node; |
| 739 | |
| 740 | |
| 741 | ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block"); |
| 742 | |
| 743 | |
| 744 | if (!gpe_device) { |
| 745 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 746 | } |
| 747 | |
| 748 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); |
| 749 | if (ACPI_FAILURE (status)) { |
| 750 | return (status); |
| 751 | } |
| 752 | |
| 753 | node = acpi_ns_map_handle_to_node (gpe_device); |
| 754 | if (!node) { |
| 755 | status = AE_BAD_PARAMETER; |
| 756 | goto unlock_and_exit; |
| 757 | } |
| 758 | |
| 759 | /* Get the device_object attached to the node */ |
| 760 | |
| 761 | obj_desc = acpi_ns_get_attached_object (node); |
| 762 | if (!obj_desc || |
| 763 | !obj_desc->device.gpe_block) { |
| 764 | return_ACPI_STATUS (AE_NULL_OBJECT); |
| 765 | } |
| 766 | |
| 767 | /* Delete the GPE block (but not the device_object) */ |
| 768 | |
| 769 | status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block); |
| 770 | if (ACPI_SUCCESS (status)) { |
| 771 | obj_desc->device.gpe_block = NULL; |
| 772 | } |
| 773 | |
| 774 | unlock_and_exit: |
| 775 | (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); |
| 776 | return_ACPI_STATUS (status); |
| 777 | } |
| 778 | EXPORT_SYMBOL(acpi_remove_gpe_block); |