sys/external/intel-public/acpica/dist/hardware/hwgpe.c

   1
   2 /******************************************************************************
   3  *
   4  * Module Name: hwgpe - Low level GPE enable/disable/clear functions
   5  *
   6  *****************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89  * PARTICULAR PURPOSE.
  90  *
  91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98  * LIMITED REMEDY.
  99  *
 100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 101  * software or system incorporating such software without first obtaining any
 102  * required license or other approval from the U. S. Department of Commerce or
 103  * any other agency or department of the United States Government.  In the
 104  * event Licensee exports any such software from the United States or
 105  * re-exports any such software from a foreign destination, Licensee shall
 106  * ensure that the distribution and export/re-export of the software is in
 107  * compliance with all laws, regulations, orders, or other restrictions of the
 108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 109  * any of its subsidiaries will export/re-export any technical data, process,
 110  * software, or service, directly or indirectly, to any country for which the
 111  * United States government or any agency thereof requires an export license,
 112  * other governmental approval, or letter of assurance, without first obtaining
 113  * such license, approval or letter.
 114  *
 115  *****************************************************************************/
 116
 117 #include "acpi.h"
 118 #include "accommon.h"
 119 #include "acevents.h"
 120
 121 #define _COMPONENT          ACPI_HARDWARE
 122         ACPI_MODULE_NAME    ("hwgpe")
 123
 124 /* Local prototypes */
 125
 126 static ACPI_STATUS
 127 AcpiHwEnableWakeupGpeBlock (
 128     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 129     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 130     void                    *Context);
 131
 132
 133 /******************************************************************************
 134  *
 135  * FUNCTION:    AcpiHwLowDisableGpe
 136  *
 137  * PARAMETERS:  GpeEventInfo        - Info block for the GPE to be disabled
 138  *
 139  * RETURN:      Status
 140  *
 141  * DESCRIPTION: Disable a single GPE in the enable register.
 142  *
 143  ******************************************************************************/
 144
 145 ACPI_STATUS
 146 AcpiHwLowDisableGpe (
 147     ACPI_GPE_EVENT_INFO     *GpeEventInfo)
 148 {
 149     ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
 150     ACPI_STATUS             Status;
 151     UINT32                  EnableMask;
 152
 153
 154     /* Get the info block for the entire GPE register */
 155
 156     GpeRegisterInfo = GpeEventInfo->RegisterInfo;
 157     if (!GpeRegisterInfo)
 158     {
 159         return (AE_NOT_EXIST);
 160     }
 161
 162     /* Get current value of the enable register that contains this GPE */
 163
 164     Status = AcpiHwRead (&EnableMask, &GpeRegisterInfo->EnableAddress);
 165     if (ACPI_FAILURE (Status))
 166     {
 167         return (Status);
 168     }
 169
 170     /* Clear just the bit that corresponds to this GPE */
 171
 172     ACPI_CLEAR_BIT (EnableMask, ((UINT32) 1 <<
 173         (GpeEventInfo->GpeNumber - GpeRegisterInfo->BaseGpeNumber)));
 174
 175
 176     /* Write the updated enable mask */
 177
 178     Status = AcpiHwWrite (EnableMask, &GpeRegisterInfo->EnableAddress);
 179     return (Status);
 180 }
 181
 182
 183 /******************************************************************************
 184  *
 185  * FUNCTION:    AcpiHwWriteGpeEnableReg
 186  *
 187  * PARAMETERS:  GpeEventInfo        - Info block for the GPE to be enabled
 188  *
 189  * RETURN:      Status
 190  *
 191  * DESCRIPTION: Write a GPE enable register.  Note: The bit for this GPE must
 192  *              already be cleared or set in the parent register
 193  *              EnableForRun mask.
 194  *
 195  ******************************************************************************/
 196
 197 ACPI_STATUS
 198 AcpiHwWriteGpeEnableReg (
 199     ACPI_GPE_EVENT_INFO     *GpeEventInfo)
 200 {
 201     ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
 202     ACPI_STATUS             Status;
 203
 204
 205     ACPI_FUNCTION_ENTRY ();
 206
 207
 208     /* Get the info block for the entire GPE register */
 209
 210     GpeRegisterInfo = GpeEventInfo->RegisterInfo;
 211     if (!GpeRegisterInfo)
 212     {
 213         return (AE_NOT_EXIST);
 214     }
 215
 216     /* Write the entire GPE (runtime) enable register */
 217
 218     Status = AcpiHwWrite (GpeRegisterInfo->EnableForRun,
 219                     &GpeRegisterInfo->EnableAddress);
 220
 221     return (Status);
 222 }
 223
 224
 225 /******************************************************************************
 226  *
 227  * FUNCTION:    AcpiHwClearGpe
 228  *
 229  * PARAMETERS:  GpeEventInfo        - Info block for the GPE to be cleared
 230  *
 231  * RETURN:      Status
 232  *
 233  * DESCRIPTION: Clear the status bit for a single GPE.
 234  *
 235  ******************************************************************************/
 236
 237 ACPI_STATUS
 238 AcpiHwClearGpe (
 239     ACPI_GPE_EVENT_INFO     *GpeEventInfo)
 240 {
 241     ACPI_STATUS             Status;
 242     UINT8                   RegisterBit;
 243
 244
 245     ACPI_FUNCTION_ENTRY ();
 246
 247
 248     RegisterBit = (UINT8) (1 <<
 249         (GpeEventInfo->GpeNumber - GpeEventInfo->RegisterInfo->BaseGpeNumber));
 250
 251     /*
 252      * Write a one to the appropriate bit in the status register to
 253      * clear this GPE.
 254      */
 255     Status = AcpiHwWrite (RegisterBit,
 256                     &GpeEventInfo->RegisterInfo->StatusAddress);
 257
 258     return (Status);
 259 }
 260
 261
 262 /******************************************************************************
 263  *
 264  * FUNCTION:    AcpiHwGetGpeStatus
 265  *
 266  * PARAMETERS:  GpeEventInfo        - Info block for the GPE to queried
 267  *              EventStatus         - Where the GPE status is returned
 268  *
 269  * RETURN:      Status
 270  *
 271  * DESCRIPTION: Return the status of a single GPE.
 272  *
 273  ******************************************************************************/
 274
 275 ACPI_STATUS
 276 AcpiHwGetGpeStatus (
 277     ACPI_GPE_EVENT_INFO     *GpeEventInfo,
 278     ACPI_EVENT_STATUS       *EventStatus)
 279 {
 280     UINT32                  InByte;
 281     UINT8                   RegisterBit;
 282     ACPI_GPE_REGISTER_INFO  *GpeRegisterInfo;
 283     ACPI_STATUS             Status;
 284     ACPI_EVENT_STATUS       LocalEventStatus = 0;
 285
 286
 287     ACPI_FUNCTION_ENTRY ();
 288
 289
 290     if (!EventStatus)
 291     {
 292         return (AE_BAD_PARAMETER);
 293     }
 294
 295     /* Get the info block for the entire GPE register */
 296
 297     GpeRegisterInfo = GpeEventInfo->RegisterInfo;
 298
 299     /* Get the register bitmask for this GPE */
 300
 301     RegisterBit = (UINT8) (1 <<
 302         (GpeEventInfo->GpeNumber - GpeEventInfo->RegisterInfo->BaseGpeNumber));
 303
 304     /* GPE currently enabled? (enabled for runtime?) */
 305
 306     if (RegisterBit & GpeRegisterInfo->EnableForRun)
 307     {
 308         LocalEventStatus |= ACPI_EVENT_FLAG_ENABLED;
 309     }
 310
 311     /* GPE enabled for wake? */
 312
 313     if (RegisterBit & GpeRegisterInfo->EnableForWake)
 314     {
 315         LocalEventStatus |= ACPI_EVENT_FLAG_WAKE_ENABLED;
 316     }
 317
 318     /* GPE currently active (status bit == 1)? */
 319
 320     Status = AcpiHwRead (&InByte, &GpeRegisterInfo->StatusAddress);
 321     if (ACPI_FAILURE (Status))
 322     {
 323         goto UnlockAndExit;
 324     }
 325
 326     if (RegisterBit & InByte)
 327     {
 328         LocalEventStatus |= ACPI_EVENT_FLAG_SET;
 329     }
 330
 331     /* Set return value */
 332
 333     (*EventStatus) = LocalEventStatus;
 334
 335
 336 UnlockAndExit:
 337     return (Status);
 338 }
 339
 340
 341 /******************************************************************************
 342  *
 343  * FUNCTION:    AcpiHwDisableGpeBlock
 344  *
 345  * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
 346  *              GpeBlock            - Gpe Block info
 347  *
 348  * RETURN:      Status
 349  *
 350  * DESCRIPTION: Disable all GPEs within a single GPE block
 351  *
 352  ******************************************************************************/
 353
 354 ACPI_STATUS
 355 AcpiHwDisableGpeBlock (
 356     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 357     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 358     void                    *Context)
 359 {
 360     UINT32                  i;
 361     ACPI_STATUS             Status;
 362
 363
 364     /* Examine each GPE Register within the block */
 365
 366     for (i = 0; i < GpeBlock->RegisterCount; i++)
 367     {
 368         /* Disable all GPEs in this register */
 369
 370         Status = AcpiHwWrite (0x00, &GpeBlock->RegisterInfo[i].EnableAddress);
 371         if (ACPI_FAILURE (Status))
 372         {
 373             return (Status);
 374         }
 375     }
 376
 377     return (AE_OK);
 378 }
 379
 380
 381 /******************************************************************************
 382  *
 383  * FUNCTION:    AcpiHwClearGpeBlock
 384  *
 385  * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
 386  *              GpeBlock            - Gpe Block info
 387  *
 388  * RETURN:      Status
 389  *
 390  * DESCRIPTION: Clear status bits for all GPEs within a single GPE block
 391  *
 392  ******************************************************************************/
 393
 394 ACPI_STATUS
 395 AcpiHwClearGpeBlock (
 396     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 397     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 398     void                    *Context)
 399 {
 400     UINT32                  i;
 401     ACPI_STATUS             Status;
 402
 403
 404     /* Examine each GPE Register within the block */
 405
 406     for (i = 0; i < GpeBlock->RegisterCount; i++)
 407     {
 408         /* Clear status on all GPEs in this register */
 409
 410         Status = AcpiHwWrite (0xFF, &GpeBlock->RegisterInfo[i].StatusAddress);
 411         if (ACPI_FAILURE (Status))
 412         {
 413             return (Status);
 414         }
 415     }
 416
 417     return (AE_OK);
 418 }
 419
 420
 421 /******************************************************************************
 422  *
 423  * FUNCTION:    AcpiHwEnableRuntimeGpeBlock
 424  *
 425  * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
 426  *              GpeBlock            - Gpe Block info
 427  *
 428  * RETURN:      Status
 429  *
 430  * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
 431  *              combination wake/run GPEs.
 432  *
 433  ******************************************************************************/
 434
 435 ACPI_STATUS
 436 AcpiHwEnableRuntimeGpeBlock (
 437     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 438     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 439     void                    *Context)
 440 {
 441     UINT32                  i;
 442     ACPI_STATUS             Status;
 443
 444
 445     /* NOTE: assumes that all GPEs are currently disabled */
 446
 447     /* Examine each GPE Register within the block */
 448
 449     for (i = 0; i < GpeBlock->RegisterCount; i++)
 450     {
 451         if (!GpeBlock->RegisterInfo[i].EnableForRun)
 452         {
 453             continue;
 454         }
 455
 456         /* Enable all "runtime" GPEs in this register */
 457
 458         Status = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForRun,
 459                     &GpeBlock->RegisterInfo[i].EnableAddress);
 460         if (ACPI_FAILURE (Status))
 461         {
 462             return (Status);
 463         }
 464     }
 465
 466     return (AE_OK);
 467 }
 468
 469
 470 /******************************************************************************
 471  *
 472  * FUNCTION:    AcpiHwEnableWakeupGpeBlock
 473  *
 474  * PARAMETERS:  GpeXruptInfo        - GPE Interrupt info
 475  *              GpeBlock            - Gpe Block info
 476  *
 477  * RETURN:      Status
 478  *
 479  * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
 480  *              combination wake/run GPEs.
 481  *
 482  ******************************************************************************/
 483
 484 static ACPI_STATUS
 485 AcpiHwEnableWakeupGpeBlock (
 486     ACPI_GPE_XRUPT_INFO     *GpeXruptInfo,
 487     ACPI_GPE_BLOCK_INFO     *GpeBlock,
 488     void                    *Context)
 489 {
 490     UINT32                  i;
 491     ACPI_STATUS             Status;
 492
 493
 494     /* Examine each GPE Register within the block */
 495
 496     for (i = 0; i < GpeBlock->RegisterCount; i++)
 497     {
 498         if (!GpeBlock->RegisterInfo[i].EnableForWake)
 499         {
 500             continue;
 501         }
 502
 503         /* Enable all "wake" GPEs in this register */
 504
 505         Status = AcpiHwWrite (GpeBlock->RegisterInfo[i].EnableForWake,
 506                     &GpeBlock->RegisterInfo[i].EnableAddress);
 507         if (ACPI_FAILURE (Status))
 508         {
 509             return (Status);
 510         }
 511     }
 512
 513     return (AE_OK);
 514 }
 515
 516
 517 /******************************************************************************
 518  *
 519  * FUNCTION:    AcpiHwDisableAllGpes
 520  *
 521  * PARAMETERS:  None
 522  *
 523  * RETURN:      Status
 524  *
 525  * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
 526  *
 527  ******************************************************************************/
 528
 529 ACPI_STATUS
 530 AcpiHwDisableAllGpes (
 531     void)
 532 {
 533     ACPI_STATUS             Status;
 534
 535
 536     ACPI_FUNCTION_TRACE (HwDisableAllGpes);
 537
 538
 539     Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL);
 540     Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock, NULL);
 541     return_ACPI_STATUS (Status);
 542 }
 543
 544
 545 /******************************************************************************
 546  *
 547  * FUNCTION:    AcpiHwEnableAllRuntimeGpes
 548  *
 549  * PARAMETERS:  None
 550  *
 551  * RETURN:      Status
 552  *
 553  * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
 554  *
 555  ******************************************************************************/
 556
 557 ACPI_STATUS
 558 AcpiHwEnableAllRuntimeGpes (
 559     void)
 560 {
 561     ACPI_STATUS             Status;
 562
 563
 564     ACPI_FUNCTION_TRACE (HwEnableAllRuntimeGpes);
 565
 566
 567     Status = AcpiEvWalkGpeList (AcpiHwEnableRuntimeGpeBlock, NULL);
 568     return_ACPI_STATUS (Status);
 569 }
 570
 571
 572 /******************************************************************************
 573  *
 574  * FUNCTION:    AcpiHwEnableAllWakeupGpes
 575  *
 576  * PARAMETERS:  None
 577  *
 578  * RETURN:      Status
 579  *
 580  * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
 581  *
 582  ******************************************************************************/
 583
 584 ACPI_STATUS
 585 AcpiHwEnableAllWakeupGpes (
 586     void)
 587 {
 588     ACPI_STATUS             Status;
 589
 590
 591     ACPI_FUNCTION_TRACE (HwEnableAllWakeupGpes);
 592
 593
 594     Status = AcpiEvWalkGpeList (AcpiHwEnableWakeupGpeBlock, NULL);
 595     return_ACPI_STATUS (Status);
 596 }
 597