| 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 */ |
| 431 | |