usr/src/uts/intel/io/acpica/events/evxfevnt.c

   1 /******************************************************************************
   2  *
   3  * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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 #define EXPORT_ACPI_INTERFACES
  45
  46 #include "acpi.h"
  47 #include "accommon.h"
  48 #include "actables.h"
  49
  50 #define _COMPONENT          ACPI_EVENTS
  51         ACPI_MODULE_NAME    ("evxfevnt")
  52
  53
  54 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
  55 /*******************************************************************************
  56  *
  57  * FUNCTION:    AcpiEnable
  58  *
  59  * PARAMETERS:  None
  60  *
  61  * RETURN:      Status
  62  *
  63  * DESCRIPTION: Transfers the system into ACPI mode.
  64  *
  65  ******************************************************************************/
  66
  67 ACPI_STATUS
  68 AcpiEnable (
  69     void)
  70 {
  71     ACPI_STATUS             Status = AE_OK;
  72
  73
  74     ACPI_FUNCTION_TRACE (AcpiEnable);
  75
  76
  77     /* ACPI tables must be present */
  78
  79     if (AcpiGbl_FadtIndex == ACPI_INVALID_TABLE_INDEX)
  80     {
  81         return_ACPI_STATUS (AE_NO_ACPI_TABLES);
  82     }
  83
  84     /* If the Hardware Reduced flag is set, machine is always in acpi mode */
  85
  86     if (AcpiGbl_ReducedHardware)
  87     {
  88         return_ACPI_STATUS (AE_OK);
  89     }
  90
  91     /* Check current mode */
  92
  93     if (AcpiHwGetMode() == ACPI_SYS_MODE_ACPI)
  94     {
  95         ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
  96             "System is already in ACPI mode\n"));
  97     }
  98     else
  99     {
 100         /* Transition to ACPI mode */
 101
 102         Status = AcpiHwSetMode (ACPI_SYS_MODE_ACPI);
 103         if (ACPI_FAILURE (Status))
 104         {
 105             ACPI_ERROR ((AE_INFO, "Could not transition to ACPI mode"));
 106             return_ACPI_STATUS (Status);
 107         }
 108
 109         ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
 110             "Transition to ACPI mode successful\n"));
 111     }
 112
 113     return_ACPI_STATUS (Status);
 114 }
 115
 116 ACPI_EXPORT_SYMBOL (AcpiEnable)
 117
 118
 119 /*******************************************************************************
 120  *
 121  * FUNCTION:    AcpiDisable
 122  *
 123  * PARAMETERS:  None
 124  *
 125  * RETURN:      Status
 126  *
 127  * DESCRIPTION: Transfers the system into LEGACY (non-ACPI) mode.
 128  *
 129  ******************************************************************************/
 130
 131 ACPI_STATUS
 132 AcpiDisable (
 133     void)
 134 {
 135     ACPI_STATUS             Status = AE_OK;
 136
 137
 138     ACPI_FUNCTION_TRACE (AcpiDisable);
 139
 140
 141     /* If the Hardware Reduced flag is set, machine is always in acpi mode */
 142
 143     if (AcpiGbl_ReducedHardware)
 144     {
 145         return_ACPI_STATUS (AE_OK);
 146     }
 147
 148     if (AcpiHwGetMode() == ACPI_SYS_MODE_LEGACY)
 149     {
 150         ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
 151             "System is already in legacy (non-ACPI) mode\n"));
 152     }
 153     else
 154     {
 155         /* Transition to LEGACY mode */
 156
 157         Status = AcpiHwSetMode (ACPI_SYS_MODE_LEGACY);
 158
 159         if (ACPI_FAILURE (Status))
 160         {
 161             ACPI_ERROR ((AE_INFO,
 162                 "Could not exit ACPI mode to legacy mode"));
 163             return_ACPI_STATUS (Status);
 164         }
 165
 166         ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
 167             "ACPI mode disabled\n"));
 168     }
 169
 170     return_ACPI_STATUS (Status);
 171 }
 172
 173 ACPI_EXPORT_SYMBOL (AcpiDisable)
 174
 175
 176 /*******************************************************************************
 177  *
 178  * FUNCTION:    AcpiEnableEvent
 179  *
 180  * PARAMETERS:  Event           - The fixed eventto be enabled
 181  *              Flags           - Reserved
 182  *
 183  * RETURN:      Status
 184  *
 185  * DESCRIPTION: Enable an ACPI event (fixed)
 186  *
 187  ******************************************************************************/
 188
 189 ACPI_STATUS
 190 AcpiEnableEvent (
 191     UINT32                  Event,
 192     UINT32                  Flags)
 193 {
 194     ACPI_STATUS             Status = AE_OK;
 195     UINT32                  Value;
 196
 197
 198     ACPI_FUNCTION_TRACE (AcpiEnableEvent);
 199
 200
 201     /* Decode the Fixed Event */
 202
 203     if (Event > ACPI_EVENT_MAX)
 204     {
 205         return_ACPI_STATUS (AE_BAD_PARAMETER);
 206     }
 207
 208     /*
 209      * Enable the requested fixed event (by writing a one to the enable
 210      * register bit)
 211      */
 212     Status = AcpiWriteBitRegister (
 213         AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
 214         ACPI_ENABLE_EVENT);
 215     if (ACPI_FAILURE (Status))
 216     {
 217         return_ACPI_STATUS (Status);
 218     }
 219
 220     /* Make sure that the hardware responded */
 221
 222     Status = AcpiReadBitRegister (
 223         AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
 224     if (ACPI_FAILURE (Status))
 225     {
 226         return_ACPI_STATUS (Status);
 227     }
 228
 229     if (Value != 1)
 230     {
 231         ACPI_ERROR ((AE_INFO,
 232             "Could not enable %s event", AcpiUtGetEventName (Event)));
 233         return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
 234     }
 235
 236     return_ACPI_STATUS (Status);
 237 }
 238
 239 ACPI_EXPORT_SYMBOL (AcpiEnableEvent)
 240
 241
 242 /*******************************************************************************
 243  *
 244  * FUNCTION:    AcpiDisableEvent
 245  *
 246  * PARAMETERS:  Event           - The fixed event to be disabled
 247  *              Flags           - Reserved
 248  *
 249  * RETURN:      Status
 250  *
 251  * DESCRIPTION: Disable an ACPI event (fixed)
 252  *
 253  ******************************************************************************/
 254
 255 ACPI_STATUS
 256 AcpiDisableEvent (
 257     UINT32                  Event,
 258     UINT32                  Flags)
 259 {
 260     ACPI_STATUS             Status = AE_OK;
 261     UINT32                  Value;
 262
 263
 264     ACPI_FUNCTION_TRACE (AcpiDisableEvent);
 265
 266
 267     /* Decode the Fixed Event */
 268
 269     if (Event > ACPI_EVENT_MAX)
 270     {
 271         return_ACPI_STATUS (AE_BAD_PARAMETER);
 272     }
 273
 274     /*
 275      * Disable the requested fixed event (by writing a zero to the enable
 276      * register bit)
 277      */
 278     Status = AcpiWriteBitRegister (
 279         AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
 280         ACPI_DISABLE_EVENT);
 281     if (ACPI_FAILURE (Status))
 282     {
 283         return_ACPI_STATUS (Status);
 284     }
 285
 286     Status = AcpiReadBitRegister (
 287         AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &Value);
 288     if (ACPI_FAILURE (Status))
 289     {
 290         return_ACPI_STATUS (Status);
 291     }
 292
 293     if (Value != 0)
 294     {
 295         ACPI_ERROR ((AE_INFO,
 296             "Could not disable %s events", AcpiUtGetEventName (Event)));
 297         return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
 298     }
 299
 300     return_ACPI_STATUS (Status);
 301 }
 302
 303 ACPI_EXPORT_SYMBOL (AcpiDisableEvent)
 304
 305
 306 /*******************************************************************************
 307  *
 308  * FUNCTION:    AcpiClearEvent
 309  *
 310  * PARAMETERS:  Event           - The fixed event to be cleared
 311  *
 312  * RETURN:      Status
 313  *
 314  * DESCRIPTION: Clear an ACPI event (fixed)
 315  *
 316  ******************************************************************************/
 317
 318 ACPI_STATUS
 319 AcpiClearEvent (
 320     UINT32                  Event)
 321 {
 322     ACPI_STATUS             Status = AE_OK;
 323
 324
 325     ACPI_FUNCTION_TRACE (AcpiClearEvent);
 326
 327
 328     /* Decode the Fixed Event */
 329
 330     if (Event > ACPI_EVENT_MAX)
 331     {
 332         return_ACPI_STATUS (AE_BAD_PARAMETER);
 333     }
 334
 335     /*
 336      * Clear the requested fixed event (By writing a one to the status
 337      * register bit)
 338      */
 339     Status = AcpiWriteBitRegister (
 340         AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
 341         ACPI_CLEAR_STATUS);
 342
 343     return_ACPI_STATUS (Status);
 344 }
 345
 346 ACPI_EXPORT_SYMBOL (AcpiClearEvent)
 347
 348
 349 /*******************************************************************************
 350  *
 351  * FUNCTION:    AcpiGetEventStatus
 352  *
 353  * PARAMETERS:  Event           - The fixed event
 354  *              EventStatus     - Where the current status of the event will
 355  *                                be returned
 356  *
 357  * RETURN:      Status
 358  *
 359  * DESCRIPTION: Obtains and returns the current status of the event
 360  *
 361  ******************************************************************************/
 362
 363 ACPI_STATUS
 364 AcpiGetEventStatus (
 365     UINT32                  Event,
 366     ACPI_EVENT_STATUS       *EventStatus)
 367 {
 368     ACPI_STATUS             Status;
 369     ACPI_EVENT_STATUS       LocalEventStatus = 0;
 370     UINT32                  InByte;
 371
 372
 373     ACPI_FUNCTION_TRACE (AcpiGetEventStatus);
 374
 375
 376     if (!EventStatus)
 377     {
 378         return_ACPI_STATUS (AE_BAD_PARAMETER);
 379     }
 380
 381     /* Decode the Fixed Event */
 382
 383     if (Event > ACPI_EVENT_MAX)
 384     {
 385         return_ACPI_STATUS (AE_BAD_PARAMETER);
 386     }
 387
 388     /* Fixed event currently can be dispatched? */
 389
 390     if (AcpiGbl_FixedEventHandlers[Event].Handler)
 391     {
 392         LocalEventStatus |= ACPI_EVENT_FLAG_HAS_HANDLER;
 393     }
 394
 395     /* Fixed event currently enabled? */
 396
 397     Status = AcpiReadBitRegister (
 398         AcpiGbl_FixedEventInfo[Event].EnableRegisterId, &InByte);
 399     if (ACPI_FAILURE (Status))
 400     {
 401         return_ACPI_STATUS (Status);
 402     }
 403
 404     if (InByte)
 405     {
 406         LocalEventStatus |=
 407             (ACPI_EVENT_FLAG_ENABLED | ACPI_EVENT_FLAG_ENABLE_SET);
 408     }
 409
 410     /* Fixed event currently active? */
 411
 412     Status = AcpiReadBitRegister (
 413         AcpiGbl_FixedEventInfo[Event].StatusRegisterId, &InByte);
 414     if (ACPI_FAILURE (Status))
 415     {
 416         return_ACPI_STATUS (Status);
 417     }
 418
 419     if (InByte)
 420     {
 421         LocalEventStatus |= ACPI_EVENT_FLAG_STATUS_SET;
 422     }
 423
 424     (*EventStatus) = LocalEventStatus;
 425     return_ACPI_STATUS (AE_OK);
 426 }
 427
 428 ACPI_EXPORT_SYMBOL (AcpiGetEventStatus)
 429
 430 #endif /* !ACPI_REDUCED_HARDWARE */