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 - 2012, 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__ 118 119 #include "acpi.h" 120 #include "accommon.h" 121 #include "actables.h" 122 123 #define _COMPONENT ACPI_EVENTS 124 ACPI_MODULE_NAME ("evxfevnt") 125 126 127 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ 128 /******************************************************************************* 129 * 130 * FUNCTION: AcpiEnable 131 * 132 * PARAMETERS: None 133 * 134 * RETURN: Status 135 * 136 * DESCRIPTION: Transfers the system into ACPI mode. 137 * 138 ******************************************************************************/ 139 140 ACPI_STATUS 141 AcpiEnable ( 142 void) 143 { 144 ACPI_STATUS Status = AE_OK; 145 146 147 ACPI_FUNCTION_TRACE (AcpiEnable); 148 149 150 /* ACPI tables must be present */ 151 152 if (!AcpiTbTablesLoaded ()) 153 { 154 return_ACPI_STATUS (AE_NO_ACPI_TABLES); 155 } 156 157 /* Check current mode */ 158 159 if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI) 160 { 161 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n")); 162 } 163 else 164 { 165 /* Transition to ACPI mode */ 166 167 Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI); 168 if (ACPI_FAILURE (Status)) 169 { 170 ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode")); 171 return_ACPI_STATUS (Status); 172 } 173 174 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 175 "Transition to ACPI mode successful\n")); 176 } 177 178 return_ACPI_STATUS (Status); 179 } 180 181 ACPI_EXPORT_SYMBOL (AcpiEnable) 182 183 184 /******************************************************************************* 185 * 186 * FUNCTION: AcpiDisable 187 * 188 * PARAMETERS: None 189 * 190 * RETURN: Status 191 * 192 * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode. 193 * 194 ******************************************************************************/ 195 196 ACPI_STATUS 197 AcpiDisable ( 198 void) 199 { 200 ACPI_STATUS Status = AE_OK; 201 202 203 ACPI_FUNCTION_TRACE (AcpiDisable); 204 205 206 if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY) 207 { 208 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 209 "System is already in legacy (non-ACPI) mode\n")); 210 } 211 else 212 { 213 /* Transition to LEGACY mode */ 214 215 Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY); 216 217 if (ACPI_FAILURE (Status)) 218 { 219 ACPI_ERROR ((AE_INFO, 220 "Could not exit ACPI mode to legacy mode")); 221 return_ACPI_STATUS (Status); 222 } 223 224 ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n")); 225 } 226 227 return_ACPI_STATUS (Status); 228 } 229 230 ACPI_EXPORT_SYMBOL (AcpiDisable) 231 232 233 /******************************************************************************* 234 * 235 * FUNCTION: AcpiEnableEvent 236 * 237 * PARAMETERS: Event - The fixed eventto be enabled 238 * Flags - Reserved 239 * 240 * RETURN: Status 241 * 242 * DESCRIPTION: Enable an ACPI event (fixed) 243 * 244 ******************************************************************************/ 245 246 ACPI_STATUS 247 AcpiEnableEvent ( 248 UINT32 Event, 249 UINT32 Flags) 250 { 251 ACPI_STATUS Status = AE_OK; 252 UINT32 Value; 253 254 255 ACPI_FUNCTION_TRACE (AcpiEnableEvent); 256 257 258 /* Decode the Fixed Event */ 259 260 if (Event > ACPI_EVENT_MAX) 261 { 262 return_ACPI_STATUS (AE_BAD_PARAMETER); 263 } 264 265 /* 266 * Enable the requested fixed event (by writing a one to the enable 267 * register bit) 268 */ 269 Status = AcpiWriteBitRegister ( 270 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 271 ACPI_ENABLE_EVENT); 272 if (ACPI_FAILURE (Status)) 273 { 274 return_ACPI_STATUS (Status); 275 } 276 277 /* Make sure that the hardware responded */ 278 279 Status = AcpiReadBitRegister ( 280 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value); 281 if (ACPI_FAILURE (Status)) 282 { 283 return_ACPI_STATUS (Status); 284 } 285 286 if (Value != 1) 287 { 288 ACPI_ERROR ((AE_INFO, 289 "Could not enable %s event", AcpiUtGetEventName (Event))); 290 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 291 } 292 293 return_ACPI_STATUS (Status); 294 } 295 296 ACPI_EXPORT_SYMBOL (AcpiEnableEvent) 297 298 299 /******************************************************************************* 300 * 301 * FUNCTION: AcpiDisableEvent 302 * 303 * PARAMETERS: Event - The fixed event to be disabled 304 * Flags - Reserved 305 * 306 * RETURN: Status 307 * 308 * DESCRIPTION: Disable an ACPI event (fixed) 309 * 310 ******************************************************************************/ 311 312 ACPI_STATUS 313 AcpiDisableEvent ( 314 UINT32 Event, 315 UINT32 Flags) 316 { 317 ACPI_STATUS Status = AE_OK; 318 UINT32 Value; 319 320 321 ACPI_FUNCTION_TRACE (AcpiDisableEvent); 322 323 324 /* Decode the Fixed Event */ 325 326 if (Event > ACPI_EVENT_MAX) 327 { 328 return_ACPI_STATUS (AE_BAD_PARAMETER); 329 } 330 331 /* 332 * Disable the requested fixed event (by writing a zero to the enable 333 * register bit) 334 */ 335 Status = AcpiWriteBitRegister ( 336 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, 337 ACPI_DISABLE_EVENT); 338 if (ACPI_FAILURE (Status)) 339 { 340 return_ACPI_STATUS (Status); 341 } 342 343 Status = AcpiReadBitRegister ( 344 AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value); 345 if (ACPI_FAILURE (Status)) 346 { 347 return_ACPI_STATUS (Status); 348 } 349 350 if (Value != 0) 351 { 352 ACPI_ERROR ((AE_INFO, 353 "Could not disable %s events", AcpiUtGetEventName (Event))); 354 return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 355 } 356 357 return_ACPI_STATUS (Status); 358 } 359 360 ACPI_EXPORT_SYMBOL (AcpiDisableEvent) 361 362 363 /******************************************************************************* 364 * 365 * FUNCTION: AcpiClearEvent 366 * 367 * PARAMETERS: Event - The fixed event to be cleared 368 * 369 * RETURN: Status 370 * 371 * DESCRIPTION: Clear an ACPI event (fixed) 372 * 373 ******************************************************************************/ 374 375 ACPI_STATUS 376 AcpiClearEvent ( 377 UINT32 Event) 378 { 379 ACPI_STATUS Status = AE_OK; 380 381 382 ACPI_FUNCTION_TRACE (AcpiClearEvent); 383 384 385 /* Decode the Fixed Event */ 386 387 if (Event > ACPI_EVENT_MAX) 388 { 389 return_ACPI_STATUS (AE_BAD_PARAMETER); 390 } 391 392 /* 393 * Clear the requested fixed event (By writing a one to the status 394 * register bit) 395 */ 396 Status = AcpiWriteBitRegister ( 397 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, 398 ACPI_CLEAR_STATUS); 399 400 return_ACPI_STATUS (Status); 401 } 402 403 ACPI_EXPORT_SYMBOL (AcpiClearEvent) 404 405 406 /******************************************************************************* 407 * 408 * FUNCTION: AcpiGetEventStatus 409 * 410 * PARAMETERS: Event - The fixed event 411 * EventStatus - Where the current status of the event will 412 * be returned 413 * 414 * RETURN: Status 415 * 416 * DESCRIPTION: Obtains and returns the current status of the event 417 * 418 ******************************************************************************/ 419 420 ACPI_STATUS 421 AcpiGetEventStatus ( 422 UINT32 Event, 423 ACPI_EVENT_STATUS *EventStatus) 424 { 425 ACPI_STATUS Status = AE_OK; 426 427 428 ACPI_FUNCTION_TRACE (AcpiGetEventStatus); 429 430 431 if (!EventStatus) 432 { 433 return_ACPI_STATUS (AE_BAD_PARAMETER); 434 } 435 436 /* Decode the Fixed Event */ 437 438 if (Event > ACPI_EVENT_MAX) 439 { 440 return_ACPI_STATUS (AE_BAD_PARAMETER); 441 } 442 443 /* Get the status of the requested fixed event */ 444 445 Status = AcpiReadBitRegister ( 446 AcpiGbl_FixedEventInfo[Event].StatusRegisterId, EventStatus); 447 448 return_ACPI_STATUS (Status); 449 } 450 451 ACPI_EXPORT_SYMBOL (AcpiGetEventStatus) 452 453 #endif /* !ACPI_REDUCED_HARDWARE */ 454