1 /******************************************************************************
3 * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2012, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************/
117 #include "accommon.h"
119 #define _COMPONENT ACPI_HARDWARE
120 ACPI_MODULE_NAME ("hwxfsleep")
122 /* Local prototypes */
125 AcpiHwSleepDispatch (
130 * Dispatch table used to efficiently branch to the various sleep
133 #define ACPI_SLEEP_FUNCTION_ID 0
134 #define ACPI_WAKE_PREP_FUNCTION_ID 1
135 #define ACPI_WAKE_FUNCTION_ID 2
137 /* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */
139 static ACPI_SLEEP_FUNCTIONS AcpiSleepDispatch[] =
141 {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacySleep), AcpiHwExtendedSleep},
142 {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacyWakePrep), AcpiHwExtendedWakePrep},
143 {ACPI_HW_OPTIONAL_FUNCTION (AcpiHwLegacyWake), AcpiHwExtendedWake}
148 * These functions are removed for the ACPI_REDUCED_HARDWARE case:
149 * AcpiSetFirmwareWakingVector
150 * AcpiSetFirmwareWakingVector64
151 * AcpiEnterSleepStateS4bios
154 #if (!ACPI_REDUCED_HARDWARE)
155 /*******************************************************************************
157 * FUNCTION: AcpiSetFirmwareWakingVector
159 * PARAMETERS: PhysicalAddress - 32-bit physical address of ACPI real mode
164 * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS
166 ******************************************************************************/
169 AcpiSetFirmwareWakingVector (
170 UINT32 PhysicalAddress)
172 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector);
176 * According to the ACPI specification 2.0c and later, the 64-bit
177 * waking vector should be cleared and the 32-bit waking vector should
178 * be used, unless we want the wake-up code to be called by the BIOS in
179 * Protected Mode. Some systems (for example HP dv5-1004nr) are known
180 * to fail to resume if the 64-bit vector is used.
183 /* Set the 32-bit vector */
185 AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress;
187 /* Clear the 64-bit vector if it exists */
189 if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1))
191 AcpiGbl_FACS->XFirmwareWakingVector = 0;
194 return_ACPI_STATUS (AE_OK);
197 ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector)
200 #if ACPI_MACHINE_WIDTH == 64
201 /*******************************************************************************
203 * FUNCTION: AcpiSetFirmwareWakingVector64
205 * PARAMETERS: PhysicalAddress - 64-bit physical address of ACPI protected
210 * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if
211 * it exists in the table. This function is intended for use with
212 * 64-bit host operating systems.
214 ******************************************************************************/
217 AcpiSetFirmwareWakingVector64 (
218 UINT64 PhysicalAddress)
220 ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64);
223 /* Determine if the 64-bit vector actually exists */
225 if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1))
227 return_ACPI_STATUS (AE_NOT_EXIST);
230 /* Clear 32-bit vector, set the 64-bit X_ vector */
232 AcpiGbl_FACS->FirmwareWakingVector = 0;
233 AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress;
234 return_ACPI_STATUS (AE_OK);
237 ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64)
241 /*******************************************************************************
243 * FUNCTION: AcpiEnterSleepStateS4bios
249 * DESCRIPTION: Perform a S4 bios request.
250 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
252 ******************************************************************************/
255 AcpiEnterSleepStateS4bios (
262 ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios);
265 /* Clear the wake status bit (PM1) */
267 Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
268 if (ACPI_FAILURE (Status))
270 return_ACPI_STATUS (Status);
273 Status = AcpiHwClearAcpiStatus ();
274 if (ACPI_FAILURE (Status))
276 return_ACPI_STATUS (Status);
280 * 1) Disable/Clear all GPEs
281 * 2) Enable all wakeup GPEs
283 Status = AcpiHwDisableAllGpes ();
284 if (ACPI_FAILURE (Status))
286 return_ACPI_STATUS (Status);
288 AcpiGbl_SystemAwakeAndRunning = FALSE;
290 Status = AcpiHwEnableAllWakeupGpes ();
291 if (ACPI_FAILURE (Status))
293 return_ACPI_STATUS (Status);
296 ACPI_FLUSH_CPU_CACHE ();
298 Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand,
299 (UINT32) AcpiGbl_FADT.S4BiosRequest, 8);
303 Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
304 if (ACPI_FAILURE (Status))
306 return_ACPI_STATUS (Status);
310 return_ACPI_STATUS (AE_OK);
313 ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios)
315 #endif /* !ACPI_REDUCED_HARDWARE */
318 /*******************************************************************************
320 * FUNCTION: AcpiHwSleepDispatch
322 * PARAMETERS: SleepState - Which sleep state to enter/exit
323 * FunctionId - Sleep, WakePrep, or Wake
325 * RETURN: Status from the invoked sleep handling function.
327 * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling
330 ******************************************************************************/
333 AcpiHwSleepDispatch (
338 ACPI_SLEEP_FUNCTIONS *SleepFunctions = &AcpiSleepDispatch[FunctionId];
341 #if (!ACPI_REDUCED_HARDWARE)
344 * If the Hardware Reduced flag is set (from the FADT), we must
345 * use the extended sleep registers
347 if (AcpiGbl_ReducedHardware ||
348 AcpiGbl_FADT.SleepControl.Address)
350 Status = SleepFunctions->ExtendedFunction (SleepState);
356 Status = SleepFunctions->LegacyFunction (SleepState);
363 * For the case where reduced-hardware-only code is being generated,
364 * we know that only the extended sleep registers are available
366 Status = SleepFunctions->ExtendedFunction (SleepState);
369 #endif /* !ACPI_REDUCED_HARDWARE */
373 /*******************************************************************************
375 * FUNCTION: AcpiEnterSleepStatePrep
377 * PARAMETERS: SleepState - Which sleep state to enter
381 * DESCRIPTION: Prepare to enter a system sleep state.
382 * This function must execute with interrupts enabled.
383 * We break sleeping into 2 stages so that OSPM can handle
384 * various OS-specific tasks between the two steps.
386 ******************************************************************************/
389 AcpiEnterSleepStatePrep (
393 ACPI_OBJECT_LIST ArgList;
398 ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep);
401 Status = AcpiGetSleepTypeData (SleepState,
402 &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
403 if (ACPI_FAILURE (Status))
405 return_ACPI_STATUS (Status);
408 /* Execute the _PTS method (Prepare To Sleep) */
411 ArgList.Pointer = &Arg;
412 Arg.Type = ACPI_TYPE_INTEGER;
413 Arg.Integer.Value = SleepState;
415 Status = AcpiEvaluateObject (NULL, METHOD_PATHNAME__PTS, &ArgList, NULL);
416 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
418 return_ACPI_STATUS (Status);
421 /* Setup the argument to the _SST method (System STatus) */
426 SstValue = ACPI_SST_WORKING;
432 SstValue = ACPI_SST_SLEEPING;
436 SstValue = ACPI_SST_SLEEP_CONTEXT;
440 SstValue = ACPI_SST_INDICATOR_OFF; /* Default is off */
445 * Set the system indicators to show the desired sleep state.
446 * _SST is an optional method (return no error if not found)
448 AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, SstValue);
449 return_ACPI_STATUS (AE_OK);
452 ACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep)
455 /*******************************************************************************
457 * FUNCTION: AcpiEnterSleepState
459 * PARAMETERS: SleepState - Which sleep state to enter
463 * DESCRIPTION: Enter a system sleep state
464 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
466 ******************************************************************************/
469 AcpiEnterSleepState (
475 ACPI_FUNCTION_TRACE (AcpiEnterSleepState);
478 if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) ||
479 (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX))
481 ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
482 AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB));
483 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
486 Status = AcpiHwSleepDispatch (SleepState, ACPI_SLEEP_FUNCTION_ID);
487 return_ACPI_STATUS (Status);
490 ACPI_EXPORT_SYMBOL (AcpiEnterSleepState)
493 /*******************************************************************************
495 * FUNCTION: AcpiLeaveSleepStatePrep
497 * PARAMETERS: SleepState - Which sleep state we are exiting
501 * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
502 * sleep. Called with interrupts DISABLED.
503 * We break wake/resume into 2 stages so that OSPM can handle
504 * various OS-specific tasks between the two steps.
506 ******************************************************************************/
509 AcpiLeaveSleepStatePrep (
515 ACPI_FUNCTION_TRACE (AcpiLeaveSleepStatePrep);
518 Status = AcpiHwSleepDispatch (SleepState, ACPI_WAKE_PREP_FUNCTION_ID);
519 return_ACPI_STATUS (Status);
522 ACPI_EXPORT_SYMBOL (AcpiLeaveSleepStatePrep)
525 /*******************************************************************************
527 * FUNCTION: AcpiLeaveSleepState
529 * PARAMETERS: SleepState - Which sleep state we are exiting
533 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
534 * Called with interrupts ENABLED.
536 ******************************************************************************/
539 AcpiLeaveSleepState (
545 ACPI_FUNCTION_TRACE (AcpiLeaveSleepState);
548 Status = AcpiHwSleepDispatch (SleepState, ACPI_WAKE_FUNCTION_ID);
549 return_ACPI_STATUS (Status);
552 ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState)