1 /****************************************************************************** 2 * 3 * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2014, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116 117 #define __EVXFEVNT_C__ 118 #define EXPORT_ACPI_INTERFACES 119 120 #include "acpi.h" 121 #include "accommon.h" 122 #include "actables.h" 123 124 #define _COMPONENT ACPI_EVENTS 125 ACPI_MODULE_NAME ("evxfevnt") 126 127 128 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ 129 /******************************************************************************* 130 * 131 * FUNCTION: AcpiEnable 132 * 133 * PARAMETERS: None 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Transfers the system into ACPI mode. 138 * 139 ******************************************************************************/ 140 141 ACPI_STATUS 142 AcpiEnable ( 143 void) 144 { 145 ACPI_STATUS Status = AE_OK; 146 147 148 ACPI_FUNCTION_TRACE (AcpiEnable); 149 150 151 /* ACPI tables must be present */ 152 153 if (!AcpiTbTablesLoaded ()) 154 { 155 return_ACPI_STATUS (AE_NO_ACPI_TABLES); 156 } 157 158 /* If the Hardware Reduced flag is set, machine is always in acpi mode */ 159 160 if (AcpiGbl_ReducedHardware) 161 { 162 return_ACPI_STATUS (AE_OK); 163 } 164 165 /* Check current mode */ 166 167 if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI) 168 { 169 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n")); 170 } 171 else 172 { 173 /* Transition to ACPI mode */ 174 175 Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI); 176 if (ACPI_FAILURE (Status)) 177 { 178 ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode")); 179 return_ACPI_STATUS (Status); 180 } 181 182 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 183 "Transition to ACPI mode successful\n")); 184 } 185 186 return_ACPI_STATUS (Status); 187 } 188 189 ACPI_EXPORT_SYMBOL (AcpiEnable) 190 191 192 /******************************************************************************* 193 * 194 * FUNCTION: AcpiDisable 195 * 196 * PARAMETERS: None 197 * 198 * RETURN: Status 199 * 200 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. 201 * 202 ******************************************************************************/ 203 204 ACPI_STATUS 205 AcpiDisable ( 206 void) 207 { 208 ACPI_STATUS Status = AE_OK; 209 210 211 ACPI_FUNCTION_TRACE (AcpiDisable); 212 213 214 /* If the Hardware Reduced flag is set, machine is always in acpi mode */ 215 216 if (AcpiGbl_ReducedHardware) 217 { 218 return_ACPI_STATUS (AE_OK); 219 } 220 221 if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY) 222 { 223 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 224 "System is already in legacy (non-ACPI) mode\n")); 225 } 226 else 227 { 228 /* Transition to LEGACY mode */ 229 230 Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY); 231 232 if (ACPI_FAILURE (Status)) 233 { 234 ACPI_ERROR ((AE_INFO, 235 "Could not exit ACPI mode to legacy mode")); 236 return_ACPI_STATUS (Status); 237 } 238 239 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n")); 240 } 241 242 return_ACPI_STATUS (Status); 243 } 244 245 ACPI_EXPORT_SYMBOL (AcpiDisable) 246 247 248 /******************************************************************************* 249 * 250 * FUNCTION: AcpiEnableEvent 251 * 252 * PARAMETERS: Event - The fixed eventto be enabled 253 * Flags - Reserved 254 * 255 * RETURN: Status 256 * 257 * DESCRIPTION: Enable an ACPI event (fixed) 258 * 259 ******************************************************************************/ 260 261 ACPI_STATUS 262 AcpiEnableEvent ( 263 UINT32 Event, 264 UINT32 Flags) 265 { 266 ACPI_STATUS Status = AE_OK; 267 UINT32 Value; 268 269 270 ACPI_FUNCTION_TRACE (AcpiEnableEvent); 271 272 273 /* Decode the Fixed Event */ 274 275 if (Event > ACPI_EVENT_MAX) 276 { 277 return_ACPI_STATUS (AE_BAD_PARAMETER); 278 } 279 280 /* 281 * Enable the requested fixed event (by writing a one to the enable 282 * register bit) 283 */ 284 Status = AcpiWriteBitRegister ( 285 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 286 ACPI_ENABLE_EVENT); 287 if (ACPI_FAILURE (Status)) 288 { 289 return_ACPI_STATUS (Status); 290 } 291 292 /* Make sure that the hardware responded */ 293 294 Status = AcpiReadBitRegister ( 295 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value); 296 if (ACPI_FAILURE (Status)) 297 { 298 return_ACPI_STATUS (Status); 299 } 300 301 if (Value != 1) 302 { 303 ACPI_ERROR ((AE_INFO, 304 "Could not enable %s event", AcpiUtGetEventName (Event))); 305 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 306 } 307 308 return_ACPI_STATUS (Status); 309 } 310 311 ACPI_EXPORT_SYMBOL (AcpiEnableEvent) 312 313 314 /******************************************************************************* 315 * 316 * FUNCTION: AcpiDisableEvent 317 * 318 * PARAMETERS: Event - The fixed event to be disabled 319 * Flags - Reserved 320 * 321 * RETURN: Status 322 * 323 * DESCRIPTION: Disable an ACPI event (fixed) 324 * 325 ******************************************************************************/ 326 327 ACPI_STATUS 328 AcpiDisableEvent ( 329 UINT32 Event, 330 UINT32 Flags) 331 { 332 ACPI_STATUS Status = AE_OK; 333 UINT32 Value; 334 335 336 ACPI_FUNCTION_TRACE (AcpiDisableEvent); 337 338 339 /* Decode the Fixed Event */ 340 341 if (Event > ACPI_EVENT_MAX) 342 { 343 return_ACPI_STATUS (AE_BAD_PARAMETER); 344 } 345 346 /* 347 * Disable the requested fixed event (by writing a zero to the enable 348 * register bit) 349 */ 350 Status = AcpiWriteBitRegister ( 351 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 352 ACPI_DISABLE_EVENT); 353 if (ACPI_FAILURE (Status)) 354 { 355 return_ACPI_STATUS (Status); 356 } 357 358 Status = AcpiReadBitRegister ( 359 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value); 360 if (ACPI_FAILURE (Status)) 361 { 362 return_ACPI_STATUS (Status); 363 } 364 365 if (Value != 0) 366 { 367 ACPI_ERROR ((AE_INFO, 368 "Could not disable %s events", AcpiUtGetEventName (Event))); 369 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 370 } 371 372 return_ACPI_STATUS (Status); 373 } 374 375 ACPI_EXPORT_SYMBOL (AcpiDisableEvent) 376 377 378 /******************************************************************************* 379 * 380 * FUNCTION: AcpiClearEvent 381 * 382 * PARAMETERS: Event - The fixed event to be cleared 383 * 384 * RETURN: Status 385 * 386 * DESCRIPTION: Clear an ACPI event (fixed) 387 * 388 ******************************************************************************/ 389 390 ACPI_STATUS 391 AcpiClearEvent ( 392 UINT32 Event) 393 { 394 ACPI_STATUS Status = AE_OK; 395 396 397 ACPI_FUNCTION_TRACE (AcpiClearEvent); 398 399 400 /* Decode the Fixed Event */ 401 402 if (Event > ACPI_EVENT_MAX) 403 { 404 return_ACPI_STATUS (AE_BAD_PARAMETER); 405 } 406 407 /* 408 * Clear the requested fixed event (By writing a one to the status 409 * register bit) 410 */ 411 Status = AcpiWriteBitRegister ( 412 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 413 ACPI_CLEAR_STATUS); 414 415 return_ACPI_STATUS (Status); 416 } 417 418 ACPI_EXPORT_SYMBOL (AcpiClearEvent) 419 420 421 /******************************************************************************* 422 * 423 * FUNCTION: AcpiGetEventStatus 424 * 425 * PARAMETERS: Event - The fixed event 426 * EventStatus - Where the current status of the event will 427 * be returned 428 * 429 * RETURN: Status 430 * 431 * DESCRIPTION: Obtains and returns the current status of the event 432 * 433 ******************************************************************************/ 434 435 ACPI_STATUS 436 AcpiGetEventStatus ( 437 UINT32 Event, 438 ACPI_EVENT_STATUS *EventStatus) 439 { 440 ACPI_STATUS Status = AE_OK; 441 442 443 ACPI_FUNCTION_TRACE (AcpiGetEventStatus); 444 445 446 if (!EventStatus) 447 { 448 return_ACPI_STATUS (AE_BAD_PARAMETER); 449 } 450 451 /* Decode the Fixed Event */ 452 453 if (Event > ACPI_EVENT_MAX) 454 { 455 return_ACPI_STATUS (AE_BAD_PARAMETER); 456 } 457 458 /* Get the status of the requested fixed event */ 459 460 Status = AcpiReadBitRegister ( 461 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, EventStatus); 462 463 return_ACPI_STATUS (Status); 464 } 465 466 ACPI_EXPORT_SYMBOL (AcpiGetEventStatus) 467 468 #endif /* !ACPI_REDUCED_HARDWARE */ 469