Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /****************************************************************************** |
| 3 | * |
| 4 | * Module Name: hwgpe - Low level GPE enable/disable/clear functions |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
| 9 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
| 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/acevents.h> |
| 47 | |
| 48 | #define _COMPONENT ACPI_HARDWARE |
| 49 | ACPI_MODULE_NAME ("hwgpe") |
| 50 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 51 | /* Local prototypes */ |
| 52 | |
| 53 | static acpi_status |
| 54 | acpi_hw_enable_wakeup_gpe_block ( |
| 55 | struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| 56 | struct acpi_gpe_block_info *gpe_block); |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | /****************************************************************************** |
| 60 | * |
| 61 | * FUNCTION: acpi_hw_write_gpe_enable_reg |
| 62 | * |
| 63 | * PARAMETERS: gpe_event_info - Info block for the GPE to be enabled |
| 64 | * |
| 65 | * RETURN: Status |
| 66 | * |
| 67 | * DESCRIPTION: Write a GPE enable register. Note: The bit for this GPE must |
| 68 | * already be cleared or set in the parent register |
| 69 | * enable_for_run mask. |
| 70 | * |
| 71 | ******************************************************************************/ |
| 72 | |
| 73 | acpi_status |
| 74 | acpi_hw_write_gpe_enable_reg ( |
| 75 | struct acpi_gpe_event_info *gpe_event_info) |
| 76 | { |
| 77 | struct acpi_gpe_register_info *gpe_register_info; |
| 78 | acpi_status status; |
| 79 | |
| 80 | |
| 81 | ACPI_FUNCTION_ENTRY (); |
| 82 | |
| 83 | |
| 84 | /* Get the info block for the entire GPE register */ |
| 85 | |
| 86 | gpe_register_info = gpe_event_info->register_info; |
| 87 | if (!gpe_register_info) { |
| 88 | return (AE_NOT_EXIST); |
| 89 | } |
| 90 | |
| 91 | /* Write the entire GPE (runtime) enable register */ |
| 92 | |
| 93 | status = acpi_hw_low_level_write (8, gpe_register_info->enable_for_run, |
| 94 | &gpe_register_info->enable_address); |
| 95 | |
| 96 | return (status); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | /****************************************************************************** |
| 101 | * |
| 102 | * FUNCTION: acpi_hw_clear_gpe |
| 103 | * |
| 104 | * PARAMETERS: gpe_event_info - Info block for the GPE to be cleared |
| 105 | * |
| 106 | * RETURN: Status |
| 107 | * |
| 108 | * DESCRIPTION: Clear the status bit for a single GPE. |
| 109 | * |
| 110 | ******************************************************************************/ |
| 111 | |
| 112 | acpi_status |
| 113 | acpi_hw_clear_gpe ( |
| 114 | struct acpi_gpe_event_info *gpe_event_info) |
| 115 | { |
| 116 | acpi_status status; |
| 117 | |
| 118 | |
| 119 | ACPI_FUNCTION_ENTRY (); |
| 120 | |
| 121 | |
| 122 | /* |
| 123 | * Write a one to the appropriate bit in the status register to |
| 124 | * clear this GPE. |
| 125 | */ |
| 126 | status = acpi_hw_low_level_write (8, gpe_event_info->register_bit, |
| 127 | &gpe_event_info->register_info->status_address); |
| 128 | |
| 129 | return (status); |
| 130 | } |
| 131 | |
| 132 | |
| 133 | /****************************************************************************** |
| 134 | * |
| 135 | * FUNCTION: acpi_hw_get_gpe_status |
| 136 | * |
| 137 | * PARAMETERS: gpe_event_info - Info block for the GPE to queried |
| 138 | * event_status - Where the GPE status is returned |
| 139 | * |
| 140 | * RETURN: Status |
| 141 | * |
| 142 | * DESCRIPTION: Return the status of a single GPE. |
| 143 | * |
| 144 | ******************************************************************************/ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | #ifdef ACPI_FUTURE_USAGE |
| 147 | acpi_status |
| 148 | acpi_hw_get_gpe_status ( |
| 149 | struct acpi_gpe_event_info *gpe_event_info, |
| 150 | acpi_event_status *event_status) |
| 151 | { |
| 152 | u32 in_byte; |
| 153 | u8 register_bit; |
| 154 | struct acpi_gpe_register_info *gpe_register_info; |
| 155 | acpi_status status; |
| 156 | acpi_event_status local_event_status = 0; |
| 157 | |
| 158 | |
| 159 | ACPI_FUNCTION_ENTRY (); |
| 160 | |
| 161 | |
| 162 | if (!event_status) { |
| 163 | return (AE_BAD_PARAMETER); |
| 164 | } |
| 165 | |
| 166 | /* Get the info block for the entire GPE register */ |
| 167 | |
| 168 | gpe_register_info = gpe_event_info->register_info; |
| 169 | |
| 170 | /* Get the register bitmask for this GPE */ |
| 171 | |
| 172 | register_bit = gpe_event_info->register_bit; |
| 173 | |
| 174 | /* GPE currently enabled? (enabled for runtime?) */ |
| 175 | |
| 176 | if (register_bit & gpe_register_info->enable_for_run) { |
| 177 | local_event_status |= ACPI_EVENT_FLAG_ENABLED; |
| 178 | } |
| 179 | |
| 180 | /* GPE enabled for wake? */ |
| 181 | |
| 182 | if (register_bit & gpe_register_info->enable_for_wake) { |
| 183 | local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED; |
| 184 | } |
| 185 | |
| 186 | /* GPE currently active (status bit == 1)? */ |
| 187 | |
| 188 | status = acpi_hw_low_level_read (8, &in_byte, &gpe_register_info->status_address); |
| 189 | if (ACPI_FAILURE (status)) { |
| 190 | goto unlock_and_exit; |
| 191 | } |
| 192 | |
| 193 | if (register_bit & in_byte) { |
| 194 | local_event_status |= ACPI_EVENT_FLAG_SET; |
| 195 | } |
| 196 | |
| 197 | /* Set return value */ |
| 198 | |
| 199 | (*event_status) = local_event_status; |
| 200 | |
| 201 | |
| 202 | unlock_and_exit: |
| 203 | return (status); |
| 204 | } |
| 205 | #endif /* ACPI_FUTURE_USAGE */ |
| 206 | |
| 207 | |
| 208 | /****************************************************************************** |
| 209 | * |
| 210 | * FUNCTION: acpi_hw_disable_gpe_block |
| 211 | * |
| 212 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info |
| 213 | * gpe_block - Gpe Block info |
| 214 | * |
| 215 | * RETURN: Status |
| 216 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 217 | * DESCRIPTION: Disable all GPEs within a single GPE block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | * |
| 219 | ******************************************************************************/ |
| 220 | |
| 221 | acpi_status |
| 222 | acpi_hw_disable_gpe_block ( |
| 223 | struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| 224 | struct acpi_gpe_block_info *gpe_block) |
| 225 | { |
| 226 | u32 i; |
| 227 | acpi_status status; |
| 228 | |
| 229 | |
| 230 | /* Examine each GPE Register within the block */ |
| 231 | |
| 232 | for (i = 0; i < gpe_block->register_count; i++) { |
| 233 | /* Disable all GPEs in this register */ |
| 234 | |
| 235 | status = acpi_hw_low_level_write (8, 0x00, |
| 236 | &gpe_block->register_info[i].enable_address); |
| 237 | if (ACPI_FAILURE (status)) { |
| 238 | return (status); |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | return (AE_OK); |
| 243 | } |
| 244 | |
| 245 | |
| 246 | /****************************************************************************** |
| 247 | * |
| 248 | * FUNCTION: acpi_hw_clear_gpe_block |
| 249 | * |
| 250 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info |
| 251 | * gpe_block - Gpe Block info |
| 252 | * |
| 253 | * RETURN: Status |
| 254 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 255 | * DESCRIPTION: Clear status bits for all GPEs within a single GPE block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | * |
| 257 | ******************************************************************************/ |
| 258 | |
| 259 | acpi_status |
| 260 | acpi_hw_clear_gpe_block ( |
| 261 | struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| 262 | struct acpi_gpe_block_info *gpe_block) |
| 263 | { |
| 264 | u32 i; |
| 265 | acpi_status status; |
| 266 | |
| 267 | |
| 268 | /* Examine each GPE Register within the block */ |
| 269 | |
| 270 | for (i = 0; i < gpe_block->register_count; i++) { |
| 271 | /* Clear status on all GPEs in this register */ |
| 272 | |
| 273 | status = acpi_hw_low_level_write (8, 0xFF, |
| 274 | &gpe_block->register_info[i].status_address); |
| 275 | if (ACPI_FAILURE (status)) { |
| 276 | return (status); |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | return (AE_OK); |
| 281 | } |
| 282 | |
| 283 | |
| 284 | /****************************************************************************** |
| 285 | * |
| 286 | * FUNCTION: acpi_hw_enable_runtime_gpe_block |
| 287 | * |
| 288 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info |
| 289 | * gpe_block - Gpe Block info |
| 290 | * |
| 291 | * RETURN: Status |
| 292 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 293 | * DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes |
| 294 | * combination wake/run GPEs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | * |
| 296 | ******************************************************************************/ |
| 297 | |
| 298 | acpi_status |
| 299 | acpi_hw_enable_runtime_gpe_block ( |
| 300 | struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| 301 | struct acpi_gpe_block_info *gpe_block) |
| 302 | { |
| 303 | u32 i; |
| 304 | acpi_status status; |
| 305 | |
| 306 | |
| 307 | /* NOTE: assumes that all GPEs are currently disabled */ |
| 308 | |
| 309 | /* Examine each GPE Register within the block */ |
| 310 | |
| 311 | for (i = 0; i < gpe_block->register_count; i++) { |
| 312 | if (!gpe_block->register_info[i].enable_for_run) { |
| 313 | continue; |
| 314 | } |
| 315 | |
| 316 | /* Enable all "runtime" GPEs in this register */ |
| 317 | |
| 318 | status = acpi_hw_low_level_write (8, gpe_block->register_info[i].enable_for_run, |
| 319 | &gpe_block->register_info[i].enable_address); |
| 320 | if (ACPI_FAILURE (status)) { |
| 321 | return (status); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | return (AE_OK); |
| 326 | } |
| 327 | |
| 328 | |
| 329 | /****************************************************************************** |
| 330 | * |
| 331 | * FUNCTION: acpi_hw_enable_wakeup_gpe_block |
| 332 | * |
| 333 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info |
| 334 | * gpe_block - Gpe Block info |
| 335 | * |
| 336 | * RETURN: Status |
| 337 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 338 | * DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes |
| 339 | * combination wake/run GPEs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | * |
| 341 | ******************************************************************************/ |
| 342 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 343 | static acpi_status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | acpi_hw_enable_wakeup_gpe_block ( |
| 345 | struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
| 346 | struct acpi_gpe_block_info *gpe_block) |
| 347 | { |
| 348 | u32 i; |
| 349 | acpi_status status; |
| 350 | |
| 351 | |
| 352 | /* Examine each GPE Register within the block */ |
| 353 | |
| 354 | for (i = 0; i < gpe_block->register_count; i++) { |
| 355 | if (!gpe_block->register_info[i].enable_for_wake) { |
| 356 | continue; |
| 357 | } |
| 358 | |
| 359 | /* Enable all "wake" GPEs in this register */ |
| 360 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 361 | status = acpi_hw_low_level_write (8, |
| 362 | gpe_block->register_info[i].enable_for_wake, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | &gpe_block->register_info[i].enable_address); |
| 364 | if (ACPI_FAILURE (status)) { |
| 365 | return (status); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | return (AE_OK); |
| 370 | } |
| 371 | |
| 372 | |
| 373 | /****************************************************************************** |
| 374 | * |
| 375 | * FUNCTION: acpi_hw_disable_all_gpes |
| 376 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 377 | * PARAMETERS: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | * |
| 379 | * RETURN: Status |
| 380 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 381 | * DESCRIPTION: Disable and clear all GPEs in all GPE blocks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | * |
| 383 | ******************************************************************************/ |
| 384 | |
| 385 | acpi_status |
| 386 | acpi_hw_disable_all_gpes ( |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 387 | void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | { |
| 389 | acpi_status status; |
| 390 | |
| 391 | |
| 392 | ACPI_FUNCTION_TRACE ("hw_disable_all_gpes"); |
| 393 | |
| 394 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 395 | status = acpi_ev_walk_gpe_list (acpi_hw_disable_gpe_block); |
| 396 | status = acpi_ev_walk_gpe_list (acpi_hw_clear_gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | return_ACPI_STATUS (status); |
| 398 | } |
| 399 | |
| 400 | |
| 401 | /****************************************************************************** |
| 402 | * |
| 403 | * FUNCTION: acpi_hw_enable_all_runtime_gpes |
| 404 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 405 | * PARAMETERS: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | * |
| 407 | * RETURN: Status |
| 408 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 409 | * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | * |
| 411 | ******************************************************************************/ |
| 412 | |
| 413 | acpi_status |
| 414 | acpi_hw_enable_all_runtime_gpes ( |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 415 | void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
| 417 | acpi_status status; |
| 418 | |
| 419 | |
| 420 | ACPI_FUNCTION_TRACE ("hw_enable_all_runtime_gpes"); |
| 421 | |
| 422 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 423 | status = acpi_ev_walk_gpe_list (acpi_hw_enable_runtime_gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return_ACPI_STATUS (status); |
| 425 | } |
| 426 | |
| 427 | |
| 428 | /****************************************************************************** |
| 429 | * |
| 430 | * FUNCTION: acpi_hw_enable_all_wakeup_gpes |
| 431 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 432 | * PARAMETERS: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | * |
| 434 | * RETURN: Status |
| 435 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 436 | * DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | * |
| 438 | ******************************************************************************/ |
| 439 | |
| 440 | acpi_status |
| 441 | acpi_hw_enable_all_wakeup_gpes ( |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 442 | void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | { |
| 444 | acpi_status status; |
| 445 | |
| 446 | |
| 447 | ACPI_FUNCTION_TRACE ("hw_enable_all_wakeup_gpes"); |
| 448 | |
| 449 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame^] | 450 | status = acpi_ev_walk_gpe_list (acpi_hw_enable_wakeup_gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | return_ACPI_STATUS (status); |
| 452 | } |
| 453 | |