drivers/acpi/acpica/hwxfsleep.c

   1 /******************************************************************************
   2  *
   3  * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, 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/acpi.h>
  47 #include "accommon.h"
  48
  49 #define _COMPONENT          ACPI_HARDWARE
  50 ACPI_MODULE_NAME("hwxfsleep")
  51
  52 /* Local prototypes */
  53 #if (!ACPI_REDUCED_HARDWARE)
  54 static acpi_status
  55 acpi_hw_set_firmware_waking_vectors(struct acpi_table_facs *facs,
  56                                     acpi_physical_address physical_address,
  57                                     acpi_physical_address physical_address64);
  58 #endif
  59
  60 static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id);
  61
  62 /*
  63  * Dispatch table used to efficiently branch to the various sleep
  64  * functions.
  65  */
  66 #define ACPI_SLEEP_FUNCTION_ID         0
  67 #define ACPI_WAKE_PREP_FUNCTION_ID     1
  68 #define ACPI_WAKE_FUNCTION_ID          2
  69
  70 /* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
  71
  72 static struct acpi_sleep_functions acpi_sleep_dispatch[] = {
  73         {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_sleep),
  74          acpi_hw_extended_sleep},
  75         {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake_prep),
  76          acpi_hw_extended_wake_prep},
  77         {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake), acpi_hw_extended_wake}
  78 };
  79
  80 /*
  81  * These functions are removed for the ACPI_REDUCED_HARDWARE case:
  82  *      acpi_set_firmware_waking_vectors
  83  *      acpi_set_firmware_waking_vector
  84  *      acpi_set_firmware_waking_vector64
  85  *      acpi_enter_sleep_state_s4bios
  86  */
  87
  88 #if (!ACPI_REDUCED_HARDWARE)
  89 /*******************************************************************************
  90  *
  91  * FUNCTION:    acpi_hw_set_firmware_waking_vectors
  92  *
  93  * PARAMETERS:  facs                - Pointer to FACS table
  94  *              physical_address    - 32-bit physical address of ACPI real mode
  95  *                                    entry point.
  96  *              physical_address64  - 64-bit physical address of ACPI protected
  97  *                                    mode entry point.
  98  *
  99  * RETURN:      Status
 100  *
 101  * DESCRIPTION: Sets the firmware_waking_vector fields of the FACS
 102  *
 103  ******************************************************************************/
 104
 105 static acpi_status
 106 acpi_hw_set_firmware_waking_vectors(struct acpi_table_facs *facs,
 107                                     acpi_physical_address physical_address,
 108                                     acpi_physical_address physical_address64)
 109 {
 110         ACPI_FUNCTION_TRACE(acpi_hw_set_firmware_waking_vectors);
 111
 112
 113         /*
 114          * According to the ACPI specification 2.0c and later, the 64-bit
 115          * waking vector should be cleared and the 32-bit waking vector should
 116          * be used, unless we want the wake-up code to be called by the BIOS in
 117          * Protected Mode.  Some systems (for example HP dv5-1004nr) are known
 118          * to fail to resume if the 64-bit vector is used.
 119          */
 120
 121         /* Set the 32-bit vector */
 122
 123         facs->firmware_waking_vector = (u32)physical_address;
 124
 125         if (facs->length > 32) {
 126                 if (facs->version >= 1) {
 127
 128                         /* Set the 64-bit vector */
 129
 130                         facs->xfirmware_waking_vector = physical_address64;
 131                 } else {
 132                         /* Clear the 64-bit vector if it exists */
 133
 134                         facs->xfirmware_waking_vector = 0;
 135                 }
 136         }
 137
 138         return_ACPI_STATUS(AE_OK);
 139 }
 140
 141 /*******************************************************************************
 142  *
 143  * FUNCTION:    acpi_set_firmware_waking_vectors
 144  *
 145  * PARAMETERS:  physical_address    - 32-bit physical address of ACPI real mode
 146  *                                    entry point.
 147  *              physical_address64  - 64-bit physical address of ACPI protected
 148  *                                    mode entry point.
 149  *
 150  * RETURN:      Status
 151  *
 152  * DESCRIPTION: Sets the firmware_waking_vector fields of the FACS
 153  *
 154  ******************************************************************************/
 155
 156 acpi_status
 157 acpi_set_firmware_waking_vectors(acpi_physical_address physical_address,
 158                                  acpi_physical_address physical_address64)
 159 {
 160
 161         ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vectors);
 162
 163         /* If Hardware Reduced flag is set, there is no FACS */
 164
 165         if (acpi_gbl_reduced_hardware) {
 166                 return_ACPI_STATUS (AE_OK);
 167         }
 168
 169         if (acpi_gbl_facs32) {
 170                 (void)acpi_hw_set_firmware_waking_vectors(acpi_gbl_facs32,
 171                                                           physical_address,
 172                                                           physical_address64);
 173         }
 174         if (acpi_gbl_facs64) {
 175                 (void)acpi_hw_set_firmware_waking_vectors(acpi_gbl_facs64,
 176                                                           physical_address,
 177                                                           physical_address64);
 178         }
 179
 180         return_ACPI_STATUS(AE_OK);
 181 }
 182
 183 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vectors)
 184
 185 /*******************************************************************************
 186  *
 187  * FUNCTION:    acpi_set_firmware_waking_vector
 188  *
 189  * PARAMETERS:  physical_address    - 32-bit physical address of ACPI real mode
 190  *                                    entry point.
 191  *
 192  * RETURN:      Status
 193  *
 194  * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
 195  *
 196  ******************************************************************************/
 197 acpi_status acpi_set_firmware_waking_vector(u32 physical_address)
 198 {
 199         acpi_status status;
 200
 201         ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
 202
 203         status = acpi_set_firmware_waking_vectors((acpi_physical_address)
 204                                                   physical_address, 0);
 205
 206         return_ACPI_STATUS(status);
 207 }
 208
 209 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
 210
 211 #if ACPI_MACHINE_WIDTH == 64
 212 /*******************************************************************************
 213  *
 214  * FUNCTION:    acpi_set_firmware_waking_vector64
 215  *
 216  * PARAMETERS:  physical_address    - 64-bit physical address of ACPI protected
 217  *                                    mode entry point.
 218  *
 219  * RETURN:      Status
 220  *
 221  * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
 222  *              it exists in the table. This function is intended for use with
 223  *              64-bit host operating systems.
 224  *
 225  ******************************************************************************/
 226 acpi_status acpi_set_firmware_waking_vector64(u64 physical_address)
 227 {
 228         acpi_status status;
 229
 230         ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
 231
 232         status = acpi_set_firmware_waking_vectors(0,
 233                                                   (acpi_physical_address)
 234                                                   physical_address);
 235
 236         return_ACPI_STATUS(status);
 237 }
 238
 239 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
 240 #endif
 241 /*******************************************************************************
 242  *
 243  * FUNCTION:    acpi_enter_sleep_state_s4bios
 244  *
 245  * PARAMETERS:  None
 246  *
 247  * RETURN:      Status
 248  *
 249  * DESCRIPTION: Perform a S4 bios request.
 250  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 251  *
 252  ******************************************************************************/
 253 acpi_status acpi_enter_sleep_state_s4bios(void)
 254 {
 255         u32 in_value;
 256         acpi_status status;
 257
 258         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
 259
 260         /* Clear the wake status bit (PM1) */
 261
 262         status =
 263             acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
 264         if (ACPI_FAILURE(status)) {
 265                 return_ACPI_STATUS(status);
 266         }
 267
 268         status = acpi_hw_clear_acpi_status();
 269         if (ACPI_FAILURE(status)) {
 270                 return_ACPI_STATUS(status);
 271         }
 272
 273         /*
 274          * 1) Disable/Clear all GPEs
 275          * 2) Enable all wakeup GPEs
 276          */
 277         status = acpi_hw_disable_all_gpes();
 278         if (ACPI_FAILURE(status)) {
 279                 return_ACPI_STATUS(status);
 280         }
 281         acpi_gbl_system_awake_and_running = FALSE;
 282
 283         status = acpi_hw_enable_all_wakeup_gpes();
 284         if (ACPI_FAILURE(status)) {
 285                 return_ACPI_STATUS(status);
 286         }
 287
 288         ACPI_FLUSH_CPU_CACHE();
 289
 290         status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
 291                                     (u32)acpi_gbl_FADT.s4_bios_request, 8);
 292
 293         do {
 294                 acpi_os_stall(ACPI_USEC_PER_MSEC);
 295                 status =
 296                     acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
 297                 if (ACPI_FAILURE(status)) {
 298                         return_ACPI_STATUS(status);
 299                 }
 300         } while (!in_value);
 301
 302         return_ACPI_STATUS(AE_OK);
 303 }
 304
 305 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
 306 #endif                          /* !ACPI_REDUCED_HARDWARE */
 307 /*******************************************************************************
 308  *
 309  * FUNCTION:    acpi_hw_sleep_dispatch
 310  *
 311  * PARAMETERS:  sleep_state         - Which sleep state to enter/exit
 312  *              function_id         - Sleep, wake_prep, or Wake
 313  *
 314  * RETURN:      Status from the invoked sleep handling function.
 315  *
 316  * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
 317  *              function.
 318  *
 319  ******************************************************************************/
 320 static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id)
 321 {
 322         acpi_status status;
 323         struct acpi_sleep_functions *sleep_functions =
 324             &acpi_sleep_dispatch[function_id];
 325
 326 #if (!ACPI_REDUCED_HARDWARE)
 327         /*
 328          * If the Hardware Reduced flag is set (from the FADT), we must
 329          * use the extended sleep registers (FADT). Note: As per the ACPI
 330          * specification, these extended registers are to be used for HW-reduced
 331          * platforms only. They are not general-purpose replacements for the
 332          * legacy PM register sleep support.
 333          */
 334         if (acpi_gbl_reduced_hardware) {
 335                 status = sleep_functions->extended_function(sleep_state);
 336         } else {
 337                 /* Legacy sleep */
 338
 339                 status = sleep_functions->legacy_function(sleep_state);
 340         }
 341
 342         return (status);
 343
 344 #else
 345         /*
 346          * For the case where reduced-hardware-only code is being generated,
 347          * we know that only the extended sleep registers are available
 348          */
 349         status = sleep_functions->extended_function(sleep_state);
 350         return (status);
 351
 352 #endif                          /* !ACPI_REDUCED_HARDWARE */
 353 }
 354
 355 /*******************************************************************************
 356  *
 357  * FUNCTION:    acpi_enter_sleep_state_prep
 358  *
 359  * PARAMETERS:  sleep_state         - Which sleep state to enter
 360  *
 361  * RETURN:      Status
 362  *
 363  * DESCRIPTION: Prepare to enter a system sleep state.
 364  *              This function must execute with interrupts enabled.
 365  *              We break sleeping into 2 stages so that OSPM can handle
 366  *              various OS-specific tasks between the two steps.
 367  *
 368  ******************************************************************************/
 369
 370 acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 371 {
 372         acpi_status status;
 373         struct acpi_object_list arg_list;
 374         union acpi_object arg;
 375         u32 sst_value;
 376
 377         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
 378
 379         status = acpi_get_sleep_type_data(sleep_state,
 380                                           &acpi_gbl_sleep_type_a,
 381                                           &acpi_gbl_sleep_type_b);
 382         if (ACPI_FAILURE(status)) {
 383                 return_ACPI_STATUS(status);
 384         }
 385
 386         /* Execute the _PTS method (Prepare To Sleep) */
 387
 388         arg_list.count = 1;
 389         arg_list.pointer = &arg;
 390         arg.type = ACPI_TYPE_INTEGER;
 391         arg.integer.value = sleep_state;
 392
 393         status =
 394             acpi_evaluate_object(NULL, METHOD_PATHNAME__PTS, &arg_list, NULL);
 395         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 396                 return_ACPI_STATUS(status);
 397         }
 398
 399         /* Setup the argument to the _SST method (System STatus) */
 400
 401         switch (sleep_state) {
 402         case ACPI_STATE_S0:
 403
 404                 sst_value = ACPI_SST_WORKING;
 405                 break;
 406
 407         case ACPI_STATE_S1:
 408         case ACPI_STATE_S2:
 409         case ACPI_STATE_S3:
 410
 411                 sst_value = ACPI_SST_SLEEPING;
 412                 break;
 413
 414         case ACPI_STATE_S4:
 415
 416                 sst_value = ACPI_SST_SLEEP_CONTEXT;
 417                 break;
 418
 419         default:
 420
 421                 sst_value = ACPI_SST_INDICATOR_OFF;     /* Default is off */
 422                 break;
 423         }
 424
 425         /*
 426          * Set the system indicators to show the desired sleep state.
 427          * _SST is an optional method (return no error if not found)
 428          */
 429         acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, sst_value);
 430         return_ACPI_STATUS(AE_OK);
 431 }
 432
 433 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
 434
 435 /*******************************************************************************
 436  *
 437  * FUNCTION:    acpi_enter_sleep_state
 438  *
 439  * PARAMETERS:  sleep_state         - Which sleep state to enter
 440  *
 441  * RETURN:      Status
 442  *
 443  * DESCRIPTION: Enter a system sleep state
 444  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 445  *
 446  ******************************************************************************/
 447 acpi_status acpi_enter_sleep_state(u8 sleep_state)
 448 {
 449         acpi_status status;
 450
 451         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
 452
 453         if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
 454             (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
 455                 ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
 456                             acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
 457                 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 458         }
 459
 460         status = acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION_ID);
 461         return_ACPI_STATUS(status);
 462 }
 463
 464 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
 465
 466 /*******************************************************************************
 467  *
 468  * FUNCTION:    acpi_leave_sleep_state_prep
 469  *
 470  * PARAMETERS:  sleep_state         - Which sleep state we are exiting
 471  *
 472  * RETURN:      Status
 473  *
 474  * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
 475  *              sleep. Called with interrupts DISABLED.
 476  *              We break wake/resume into 2 stages so that OSPM can handle
 477  *              various OS-specific tasks between the two steps.
 478  *
 479  ******************************************************************************/
 480 acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
 481 {
 482         acpi_status status;
 483
 484         ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
 485
 486         status =
 487             acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_PREP_FUNCTION_ID);
 488         return_ACPI_STATUS(status);
 489 }
 490
 491 ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep)
 492
 493 /*******************************************************************************
 494  *
 495  * FUNCTION:    acpi_leave_sleep_state
 496  *
 497  * PARAMETERS:  sleep_state         - Which sleep state we are exiting
 498  *
 499  * RETURN:      Status
 500  *
 501  * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
 502  *              Called with interrupts ENABLED.
 503  *
 504  ******************************************************************************/
 505 acpi_status acpi_leave_sleep_state(u8 sleep_state)
 506 {
 507         acpi_status status;
 508
 509         ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
 510
 511         status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_FUNCTION_ID);
 512         return_ACPI_STATUS(status);
 513 }
 514
 515 ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)