| 1 | |
| 2 | /****************************************************************************** |
| 3 | * |
| 4 | * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
| 9 | * Copyright (C) 2000 - 2008, Intel Corp. |
| 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/accommon.h> |
| 47 | #include <acpi/actables.h> |
| 48 | |
| 49 | #define _COMPONENT ACPI_HARDWARE |
| 50 | ACPI_MODULE_NAME("hwsleep") |
| 51 | |
| 52 | /******************************************************************************* |
| 53 | * |
| 54 | * FUNCTION: acpi_set_firmware_waking_vector |
| 55 | * |
| 56 | * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode |
| 57 | * entry point. |
| 58 | * |
| 59 | * RETURN: Status |
| 60 | * |
| 61 | * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS |
| 62 | * |
| 63 | ******************************************************************************/ |
| 64 | acpi_status |
| 65 | acpi_set_firmware_waking_vector(u32 physical_address) |
| 66 | { |
| 67 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); |
| 68 | |
| 69 | |
| 70 | /* |
| 71 | * According to the ACPI specification 2.0c and later, the 64-bit |
| 72 | * waking vector should be cleared and the 32-bit waking vector should |
| 73 | * be used, unless we want the wake-up code to be called by the BIOS in |
| 74 | * Protected Mode. Some systems (for example HP dv5-1004nr) are known |
| 75 | * to fail to resume if the 64-bit vector is used. |
| 76 | */ |
| 77 | |
| 78 | /* Set the 32-bit vector */ |
| 79 | |
| 80 | acpi_gbl_FACS->firmware_waking_vector = physical_address; |
| 81 | |
| 82 | /* Clear the 64-bit vector if it exists */ |
| 83 | |
| 84 | if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) { |
| 85 | acpi_gbl_FACS->xfirmware_waking_vector = 0; |
| 86 | } |
| 87 | |
| 88 | return_ACPI_STATUS(AE_OK); |
| 89 | } |
| 90 | |
| 91 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) |
| 92 | |
| 93 | /******************************************************************************* |
| 94 | * |
| 95 | * FUNCTION: acpi_set_firmware_waking_vector64 |
| 96 | * |
| 97 | * PARAMETERS: physical_address - 64-bit physical address of ACPI protected |
| 98 | * mode entry point. |
| 99 | * |
| 100 | * RETURN: Status |
| 101 | * |
| 102 | * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if |
| 103 | * it exists in the table. |
| 104 | * |
| 105 | ******************************************************************************/ |
| 106 | acpi_status |
| 107 | acpi_set_firmware_waking_vector64(u64 physical_address) |
| 108 | { |
| 109 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64); |
| 110 | |
| 111 | |
| 112 | /* Determine if the 64-bit vector actually exists */ |
| 113 | |
| 114 | if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) { |
| 115 | return_ACPI_STATUS(AE_NOT_EXIST); |
| 116 | } |
| 117 | |
| 118 | /* Clear 32-bit vector, set the 64-bit X_ vector */ |
| 119 | |
| 120 | acpi_gbl_FACS->firmware_waking_vector = 0; |
| 121 | acpi_gbl_FACS->xfirmware_waking_vector = physical_address; |
| 122 | |
| 123 | return_ACPI_STATUS(AE_OK); |
| 124 | } |
| 125 | |
| 126 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64) |
| 127 | |
| 128 | /******************************************************************************* |
| 129 | * |
| 130 | * FUNCTION: acpi_enter_sleep_state_prep |
| 131 | * |
| 132 | * PARAMETERS: sleep_state - Which sleep state to enter |
| 133 | * |
| 134 | * RETURN: Status |
| 135 | * |
| 136 | * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) |
| 137 | * This function must execute with interrupts enabled. |
| 138 | * We break sleeping into 2 stages so that OSPM can handle |
| 139 | * various OS-specific tasks between the two steps. |
| 140 | * |
| 141 | ******************************************************************************/ |
| 142 | acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) |
| 143 | { |
| 144 | acpi_status status; |
| 145 | struct acpi_object_list arg_list; |
| 146 | union acpi_object arg; |
| 147 | |
| 148 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
| 149 | |
| 150 | /* |
| 151 | * _PSW methods could be run here to enable wake-on keyboard, LAN, etc. |
| 152 | */ |
| 153 | status = acpi_get_sleep_type_data(sleep_state, |
| 154 | &acpi_gbl_sleep_type_a, |
| 155 | &acpi_gbl_sleep_type_b); |
| 156 | if (ACPI_FAILURE(status)) { |
| 157 | return_ACPI_STATUS(status); |
| 158 | } |
| 159 | |
| 160 | /* Setup parameter object */ |
| 161 | |
| 162 | arg_list.count = 1; |
| 163 | arg_list.pointer = &arg; |
| 164 | |
| 165 | arg.type = ACPI_TYPE_INTEGER; |
| 166 | arg.integer.value = sleep_state; |
| 167 | |
| 168 | /* Run the _PTS method */ |
| 169 | |
| 170 | status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); |
| 171 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 172 | return_ACPI_STATUS(status); |
| 173 | } |
| 174 | |
| 175 | /* Setup the argument to _SST */ |
| 176 | |
| 177 | switch (sleep_state) { |
| 178 | case ACPI_STATE_S0: |
| 179 | arg.integer.value = ACPI_SST_WORKING; |
| 180 | break; |
| 181 | |
| 182 | case ACPI_STATE_S1: |
| 183 | case ACPI_STATE_S2: |
| 184 | case ACPI_STATE_S3: |
| 185 | arg.integer.value = ACPI_SST_SLEEPING; |
| 186 | break; |
| 187 | |
| 188 | case ACPI_STATE_S4: |
| 189 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; |
| 190 | break; |
| 191 | |
| 192 | default: |
| 193 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
| 194 | break; |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * Set the system indicators to show the desired sleep state. |
| 199 | * _SST is an optional method (return no error if not found) |
| 200 | */ |
| 201 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
| 202 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 203 | ACPI_EXCEPTION((AE_INFO, status, |
| 204 | "While executing method _SST")); |
| 205 | } |
| 206 | |
| 207 | return_ACPI_STATUS(AE_OK); |
| 208 | } |
| 209 | |
| 210 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
| 211 | |
| 212 | /******************************************************************************* |
| 213 | * |
| 214 | * FUNCTION: acpi_enter_sleep_state |
| 215 | * |
| 216 | * PARAMETERS: sleep_state - Which sleep state to enter |
| 217 | * |
| 218 | * RETURN: Status |
| 219 | * |
| 220 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) |
| 221 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED |
| 222 | * |
| 223 | ******************************************************************************/ |
| 224 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
| 225 | { |
| 226 | u32 PM1Acontrol; |
| 227 | u32 PM1Bcontrol; |
| 228 | struct acpi_bit_register_info *sleep_type_reg_info; |
| 229 | struct acpi_bit_register_info *sleep_enable_reg_info; |
| 230 | u32 in_value; |
| 231 | struct acpi_object_list arg_list; |
| 232 | union acpi_object arg; |
| 233 | acpi_status status; |
| 234 | |
| 235 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
| 236 | |
| 237 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || |
| 238 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
| 239 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", |
| 240 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); |
| 241 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
| 242 | } |
| 243 | |
| 244 | sleep_type_reg_info = |
| 245 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); |
| 246 | sleep_enable_reg_info = |
| 247 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); |
| 248 | |
| 249 | /* Clear wake status */ |
| 250 | |
| 251 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
| 252 | if (ACPI_FAILURE(status)) { |
| 253 | return_ACPI_STATUS(status); |
| 254 | } |
| 255 | |
| 256 | /* Clear all fixed and general purpose status bits */ |
| 257 | |
| 258 | status = acpi_hw_clear_acpi_status(); |
| 259 | if (ACPI_FAILURE(status)) { |
| 260 | return_ACPI_STATUS(status); |
| 261 | } |
| 262 | |
| 263 | /* |
| 264 | * 1) Disable/Clear all GPEs |
| 265 | * 2) Enable all wakeup GPEs |
| 266 | */ |
| 267 | status = acpi_hw_disable_all_gpes(); |
| 268 | if (ACPI_FAILURE(status)) { |
| 269 | return_ACPI_STATUS(status); |
| 270 | } |
| 271 | acpi_gbl_system_awake_and_running = FALSE; |
| 272 | |
| 273 | status = acpi_hw_enable_all_wakeup_gpes(); |
| 274 | if (ACPI_FAILURE(status)) { |
| 275 | return_ACPI_STATUS(status); |
| 276 | } |
| 277 | |
| 278 | /* Execute the _GTS method */ |
| 279 | |
| 280 | arg_list.count = 1; |
| 281 | arg_list.pointer = &arg; |
| 282 | arg.type = ACPI_TYPE_INTEGER; |
| 283 | arg.integer.value = sleep_state; |
| 284 | |
| 285 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); |
| 286 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 287 | return_ACPI_STATUS(status); |
| 288 | } |
| 289 | |
| 290 | /* Get current value of PM1A control */ |
| 291 | |
| 292 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); |
| 293 | if (ACPI_FAILURE(status)) { |
| 294 | return_ACPI_STATUS(status); |
| 295 | } |
| 296 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| 297 | "Entering sleep state [S%d]\n", sleep_state)); |
| 298 | |
| 299 | /* Clear SLP_EN and SLP_TYP fields */ |
| 300 | |
| 301 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | |
| 302 | sleep_enable_reg_info->access_bit_mask); |
| 303 | PM1Bcontrol = PM1Acontrol; |
| 304 | |
| 305 | /* Insert SLP_TYP bits */ |
| 306 | |
| 307 | PM1Acontrol |= |
| 308 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); |
| 309 | PM1Bcontrol |= |
| 310 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); |
| 311 | |
| 312 | /* |
| 313 | * We split the writes of SLP_TYP and SLP_EN to workaround |
| 314 | * poorly implemented hardware. |
| 315 | */ |
| 316 | |
| 317 | /* Write #1: fill in SLP_TYP data */ |
| 318 | |
| 319 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
| 320 | PM1Acontrol); |
| 321 | if (ACPI_FAILURE(status)) { |
| 322 | return_ACPI_STATUS(status); |
| 323 | } |
| 324 | |
| 325 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
| 326 | PM1Bcontrol); |
| 327 | if (ACPI_FAILURE(status)) { |
| 328 | return_ACPI_STATUS(status); |
| 329 | } |
| 330 | |
| 331 | /* Insert SLP_ENABLE bit */ |
| 332 | |
| 333 | PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; |
| 334 | PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; |
| 335 | |
| 336 | /* Write #2: SLP_TYP + SLP_EN */ |
| 337 | |
| 338 | ACPI_FLUSH_CPU_CACHE(); |
| 339 | |
| 340 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
| 341 | PM1Acontrol); |
| 342 | if (ACPI_FAILURE(status)) { |
| 343 | return_ACPI_STATUS(status); |
| 344 | } |
| 345 | |
| 346 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
| 347 | PM1Bcontrol); |
| 348 | if (ACPI_FAILURE(status)) { |
| 349 | return_ACPI_STATUS(status); |
| 350 | } |
| 351 | |
| 352 | if (sleep_state > ACPI_STATE_S3) { |
| 353 | /* |
| 354 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
| 355 | * fact that we are still executing!) |
| 356 | * |
| 357 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
| 358 | * all machines. |
| 359 | * |
| 360 | * We wait so long to allow chipsets that poll this reg very slowly to |
| 361 | * still read the right value. Ideally, this block would go |
| 362 | * away entirely. |
| 363 | */ |
| 364 | acpi_os_stall(10000000); |
| 365 | |
| 366 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
| 367 | sleep_enable_reg_info-> |
| 368 | access_bit_mask); |
| 369 | if (ACPI_FAILURE(status)) { |
| 370 | return_ACPI_STATUS(status); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /* Wait until we enter sleep state */ |
| 375 | |
| 376 | do { |
| 377 | status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS, |
| 378 | &in_value); |
| 379 | if (ACPI_FAILURE(status)) { |
| 380 | return_ACPI_STATUS(status); |
| 381 | } |
| 382 | |
| 383 | /* Spin until we wake */ |
| 384 | |
| 385 | } while (!in_value); |
| 386 | |
| 387 | return_ACPI_STATUS(AE_OK); |
| 388 | } |
| 389 | |
| 390 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
| 391 | |
| 392 | /******************************************************************************* |
| 393 | * |
| 394 | * FUNCTION: acpi_enter_sleep_state_s4bios |
| 395 | * |
| 396 | * PARAMETERS: None |
| 397 | * |
| 398 | * RETURN: Status |
| 399 | * |
| 400 | * DESCRIPTION: Perform a S4 bios request. |
| 401 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED |
| 402 | * |
| 403 | ******************************************************************************/ |
| 404 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
| 405 | { |
| 406 | u32 in_value; |
| 407 | acpi_status status; |
| 408 | |
| 409 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
| 410 | |
| 411 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
| 412 | if (ACPI_FAILURE(status)) { |
| 413 | return_ACPI_STATUS(status); |
| 414 | } |
| 415 | |
| 416 | status = acpi_hw_clear_acpi_status(); |
| 417 | if (ACPI_FAILURE(status)) { |
| 418 | return_ACPI_STATUS(status); |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * 1) Disable/Clear all GPEs |
| 423 | * 2) Enable all wakeup GPEs |
| 424 | */ |
| 425 | status = acpi_hw_disable_all_gpes(); |
| 426 | if (ACPI_FAILURE(status)) { |
| 427 | return_ACPI_STATUS(status); |
| 428 | } |
| 429 | acpi_gbl_system_awake_and_running = FALSE; |
| 430 | |
| 431 | status = acpi_hw_enable_all_wakeup_gpes(); |
| 432 | if (ACPI_FAILURE(status)) { |
| 433 | return_ACPI_STATUS(status); |
| 434 | } |
| 435 | |
| 436 | ACPI_FLUSH_CPU_CACHE(); |
| 437 | |
| 438 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
| 439 | (u32) acpi_gbl_FADT.S4bios_request, 8); |
| 440 | |
| 441 | do { |
| 442 | acpi_os_stall(1000); |
| 443 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
| 444 | if (ACPI_FAILURE(status)) { |
| 445 | return_ACPI_STATUS(status); |
| 446 | } |
| 447 | } while (!in_value); |
| 448 | |
| 449 | return_ACPI_STATUS(AE_OK); |
| 450 | } |
| 451 | |
| 452 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
| 453 | |
| 454 | /******************************************************************************* |
| 455 | * |
| 456 | * FUNCTION: acpi_leave_sleep_state_prep |
| 457 | * |
| 458 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
| 459 | * |
| 460 | * RETURN: Status |
| 461 | * |
| 462 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
| 463 | * sleep. |
| 464 | * Called with interrupts DISABLED. |
| 465 | * |
| 466 | ******************************************************************************/ |
| 467 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
| 468 | { |
| 469 | struct acpi_object_list arg_list; |
| 470 | union acpi_object arg; |
| 471 | acpi_status status; |
| 472 | struct acpi_bit_register_info *sleep_type_reg_info; |
| 473 | struct acpi_bit_register_info *sleep_enable_reg_info; |
| 474 | u32 PM1Acontrol; |
| 475 | u32 PM1Bcontrol; |
| 476 | |
| 477 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
| 478 | |
| 479 | /* |
| 480 | * Set SLP_TYPE and SLP_EN to state S0. |
| 481 | * This is unclear from the ACPI Spec, but it is required |
| 482 | * by some machines. |
| 483 | */ |
| 484 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
| 485 | &acpi_gbl_sleep_type_a, |
| 486 | &acpi_gbl_sleep_type_b); |
| 487 | if (ACPI_SUCCESS(status)) { |
| 488 | sleep_type_reg_info = |
| 489 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); |
| 490 | sleep_enable_reg_info = |
| 491 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); |
| 492 | |
| 493 | /* Get current value of PM1A control */ |
| 494 | |
| 495 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
| 496 | &PM1Acontrol); |
| 497 | if (ACPI_SUCCESS(status)) { |
| 498 | |
| 499 | /* Clear SLP_EN and SLP_TYP fields */ |
| 500 | |
| 501 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | |
| 502 | sleep_enable_reg_info-> |
| 503 | access_bit_mask); |
| 504 | PM1Bcontrol = PM1Acontrol; |
| 505 | |
| 506 | /* Insert SLP_TYP bits */ |
| 507 | |
| 508 | PM1Acontrol |= |
| 509 | (acpi_gbl_sleep_type_a << sleep_type_reg_info-> |
| 510 | bit_position); |
| 511 | PM1Bcontrol |= |
| 512 | (acpi_gbl_sleep_type_b << sleep_type_reg_info-> |
| 513 | bit_position); |
| 514 | |
| 515 | /* Just ignore any errors */ |
| 516 | |
| 517 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
| 518 | PM1Acontrol); |
| 519 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
| 520 | PM1Bcontrol); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | /* Execute the _BFS method */ |
| 525 | |
| 526 | arg_list.count = 1; |
| 527 | arg_list.pointer = &arg; |
| 528 | arg.type = ACPI_TYPE_INTEGER; |
| 529 | arg.integer.value = sleep_state; |
| 530 | |
| 531 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); |
| 532 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 533 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); |
| 534 | } |
| 535 | |
| 536 | return_ACPI_STATUS(status); |
| 537 | } |
| 538 | |
| 539 | /******************************************************************************* |
| 540 | * |
| 541 | * FUNCTION: acpi_leave_sleep_state |
| 542 | * |
| 543 | * PARAMETERS: sleep_state - Which sleep state we just exited |
| 544 | * |
| 545 | * RETURN: Status |
| 546 | * |
| 547 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep |
| 548 | * Called with interrupts ENABLED. |
| 549 | * |
| 550 | ******************************************************************************/ |
| 551 | acpi_status acpi_leave_sleep_state(u8 sleep_state) |
| 552 | { |
| 553 | struct acpi_object_list arg_list; |
| 554 | union acpi_object arg; |
| 555 | acpi_status status; |
| 556 | |
| 557 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); |
| 558 | |
| 559 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
| 560 | |
| 561 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; |
| 562 | |
| 563 | /* Setup parameter object */ |
| 564 | |
| 565 | arg_list.count = 1; |
| 566 | arg_list.pointer = &arg; |
| 567 | arg.type = ACPI_TYPE_INTEGER; |
| 568 | |
| 569 | /* Ignore any errors from these methods */ |
| 570 | |
| 571 | arg.integer.value = ACPI_SST_WAKING; |
| 572 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
| 573 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 574 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * GPEs must be enabled before _WAK is called as GPEs |
| 579 | * might get fired there |
| 580 | * |
| 581 | * Restore the GPEs: |
| 582 | * 1) Disable/Clear all GPEs |
| 583 | * 2) Enable all runtime GPEs |
| 584 | */ |
| 585 | status = acpi_hw_disable_all_gpes(); |
| 586 | if (ACPI_FAILURE(status)) { |
| 587 | return_ACPI_STATUS(status); |
| 588 | } |
| 589 | status = acpi_hw_enable_all_runtime_gpes(); |
| 590 | if (ACPI_FAILURE(status)) { |
| 591 | return_ACPI_STATUS(status); |
| 592 | } |
| 593 | |
| 594 | arg.integer.value = sleep_state; |
| 595 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
| 596 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 597 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); |
| 598 | } |
| 599 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ |
| 600 | |
| 601 | /* |
| 602 | * Some BIOSes assume that WAK_STS will be cleared on resume and use |
| 603 | * it to determine whether the system is rebooting or resuming. Clear |
| 604 | * it for compatibility. |
| 605 | */ |
| 606 | acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
| 607 | |
| 608 | acpi_gbl_system_awake_and_running = TRUE; |
| 609 | |
| 610 | /* Enable power button */ |
| 611 | |
| 612 | (void) |
| 613 | acpi_set_register(acpi_gbl_fixed_event_info |
| 614 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
| 615 | |
| 616 | (void) |
| 617 | acpi_set_register(acpi_gbl_fixed_event_info |
| 618 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
| 619 | |
| 620 | arg.integer.value = ACPI_SST_WORKING; |
| 621 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
| 622 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 623 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
| 624 | } |
| 625 | |
| 626 | return_ACPI_STATUS(status); |
| 627 | } |
| 628 | |
| 629 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |