hwsleep.c revision 193335
171867Smsmith 271867Smsmith/****************************************************************************** 371867Smsmith * 471867Smsmith * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface 571867Smsmith * 671867Smsmith *****************************************************************************/ 771867Smsmith 871867Smsmith/****************************************************************************** 971867Smsmith * 1071867Smsmith * 1. Copyright Notice 1171867Smsmith * 12193267Sjkim * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 1371867Smsmith * All rights reserved. 1471867Smsmith * 1571867Smsmith * 2. License 1671867Smsmith * 1771867Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1871867Smsmith * rights. You may have additional license terms from the party that provided 1971867Smsmith * you this software, covering your right to use that party's intellectual 2071867Smsmith * property rights. 2171867Smsmith * 2271867Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2371867Smsmith * copy of the source code appearing in this file ("Covered Code") an 2471867Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2571867Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2671867Smsmith * make derivatives, distribute, use and display any portion of the Covered 2771867Smsmith * Code in any form, with the right to sublicense such rights; and 2871867Smsmith * 2971867Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3071867Smsmith * license (with the right to sublicense), under only those claims of Intel 3171867Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3271867Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3371867Smsmith * solely to the minimum extent necessary to exercise the above copyright 3471867Smsmith * license, and in no event shall the patent license extend to any additions 3571867Smsmith * to or modifications of the Original Intel Code. No other license or right 3671867Smsmith * is granted directly or by implication, estoppel or otherwise; 3771867Smsmith * 3871867Smsmith * The above copyright and patent license is granted only if the following 3971867Smsmith * conditions are met: 4071867Smsmith * 4171867Smsmith * 3. Conditions 4271867Smsmith * 4371867Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4471867Smsmith * Redistribution of source code of any substantial portion of the Covered 4571867Smsmith * Code or modification with rights to further distribute source must include 4671867Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4771867Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4871867Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4971867Smsmith * contain a file documenting the changes Licensee made to create that Covered 5071867Smsmith * Code and the date of any change. Licensee must include in that file the 5171867Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5271867Smsmith * must include a prominent statement that the modification is derived, 5371867Smsmith * directly or indirectly, from Original Intel Code. 5471867Smsmith * 5571867Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5671867Smsmith * Redistribution of source code of any substantial portion of the Covered 5771867Smsmith * Code or modification without rights to further distribute source must 5871867Smsmith * include the following Disclaimer and Export Compliance provision in the 5971867Smsmith * documentation and/or other materials provided with distribution. In 6071867Smsmith * addition, Licensee may not authorize further sublicense of source of any 6171867Smsmith * portion of the Covered Code, and must include terms to the effect that the 6271867Smsmith * license from Licensee to its licensee is limited to the intellectual 6371867Smsmith * property embodied in the software Licensee provides to its licensee, and 6471867Smsmith * not to intellectual property embodied in modifications its licensee may 6571867Smsmith * make. 6671867Smsmith * 6771867Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6871867Smsmith * substantial portion of the Covered Code or modification must reproduce the 6971867Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7071867Smsmith * provision in the documentation and/or other materials provided with the 7171867Smsmith * distribution. 7271867Smsmith * 7371867Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7471867Smsmith * Intel Code. 7571867Smsmith * 7671867Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7771867Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7871867Smsmith * other dealings in products derived from or relating to the Covered Code 7971867Smsmith * without prior written authorization from Intel. 8071867Smsmith * 8171867Smsmith * 4. Disclaimer and Export Compliance 8271867Smsmith * 8371867Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8471867Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8571867Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8671867Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8771867Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8871867Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8971867Smsmith * PARTICULAR PURPOSE. 9071867Smsmith * 9171867Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9271867Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9371867Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9471867Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9571867Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9671867Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9771867Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9871867Smsmith * LIMITED REMEDY. 9971867Smsmith * 10071867Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10171867Smsmith * software or system incorporating such software without first obtaining any 10271867Smsmith * required license or other approval from the U. S. Department of Commerce or 10371867Smsmith * any other agency or department of the United States Government. In the 10471867Smsmith * event Licensee exports any such software from the United States or 10571867Smsmith * re-exports any such software from a foreign destination, Licensee shall 10671867Smsmith * ensure that the distribution and export/re-export of the software is in 10771867Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10871867Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10971867Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11071867Smsmith * software, or service, directly or indirectly, to any country for which the 11171867Smsmith * United States government or any agency thereof requires an export license, 11271867Smsmith * other governmental approval, or letter of assurance, without first obtaining 11371867Smsmith * such license, approval or letter. 11471867Smsmith * 11571867Smsmith *****************************************************************************/ 11671867Smsmith 117193251Sjkim#include "acpi.h" 118193267Sjkim#include "accommon.h" 11971867Smsmith 12077424Smsmith#define _COMPONENT ACPI_HARDWARE 12191116Smsmith ACPI_MODULE_NAME ("hwsleep") 12271867Smsmith 12371867Smsmith 124151937Sjkim/******************************************************************************* 12571867Smsmith * 12671867Smsmith * FUNCTION: AcpiSetFirmwareWakingVector 12771867Smsmith * 128193267Sjkim * PARAMETERS: PhysicalAddress - 32-bit physical address of ACPI real mode 12971867Smsmith * entry point. 13071867Smsmith * 13191116Smsmith * RETURN: Status 13271867Smsmith * 133193267Sjkim * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS 13471867Smsmith * 13571867Smsmith ******************************************************************************/ 13671867Smsmith 13771867SmsmithACPI_STATUS 13871867SmsmithAcpiSetFirmwareWakingVector ( 139193267Sjkim UINT32 PhysicalAddress) 14071867Smsmith{ 141193267Sjkim ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector); 14271867Smsmith 14371867Smsmith 144193267Sjkim /* Set the 32-bit vector */ 14571867Smsmith 146193267Sjkim AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress; 147167802Sjkim 148193267Sjkim /* Clear the 64-bit vector if it exists */ 149167802Sjkim 150193267Sjkim if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1)) 15171867Smsmith { 152193267Sjkim AcpiGbl_FACS->XFirmwareWakingVector = 0; 15371867Smsmith } 15471867Smsmith 15571867Smsmith return_ACPI_STATUS (AE_OK); 15671867Smsmith} 15771867Smsmith 158167802SjkimACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector) 15971867Smsmith 160167802Sjkim 161193267Sjkim#if ACPI_MACHINE_WIDTH == 64 162151937Sjkim/******************************************************************************* 16371867Smsmith * 164193267Sjkim * FUNCTION: AcpiSetFirmwareWakingVector64 16571867Smsmith * 166193267Sjkim * PARAMETERS: PhysicalAddress - 64-bit physical address of ACPI protected 167193267Sjkim * mode entry point. 16871867Smsmith * 169193267Sjkim * RETURN: Status 17071867Smsmith * 171193267Sjkim * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if 172193267Sjkim * it exists in the table. This function is intended for use with 173193267Sjkim * 64-bit host operating systems. 17471867Smsmith * 17571867Smsmith ******************************************************************************/ 17671867Smsmith 17771867SmsmithACPI_STATUS 178193267SjkimAcpiSetFirmwareWakingVector64 ( 179193267Sjkim UINT64 PhysicalAddress) 18071867Smsmith{ 181193267Sjkim ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64); 18271867Smsmith 18371867Smsmith 184193267Sjkim /* Determine if the 64-bit vector actually exists */ 18571867Smsmith 186193267Sjkim if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1)) 18771867Smsmith { 188193267Sjkim return_ACPI_STATUS (AE_NOT_EXIST); 18971867Smsmith } 19071867Smsmith 191193267Sjkim /* Clear 32-bit vector, set the 64-bit X_ vector */ 192167802Sjkim 193193267Sjkim AcpiGbl_FACS->FirmwareWakingVector = 0; 194193267Sjkim AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress; 19571867Smsmith return_ACPI_STATUS (AE_OK); 19671867Smsmith} 19771867Smsmith 198193267SjkimACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64) 199193267Sjkim#endif 20087031Smsmith 201151937Sjkim/******************************************************************************* 20271867Smsmith * 20387031Smsmith * FUNCTION: AcpiEnterSleepStatePrep 20471867Smsmith * 20571867Smsmith * PARAMETERS: SleepState - Which sleep state to enter 20671867Smsmith * 20771867Smsmith * RETURN: Status 20871867Smsmith * 20987031Smsmith * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) 21087031Smsmith * This function must execute with interrupts enabled. 21187031Smsmith * We break sleeping into 2 stages so that OSPM can handle 21287031Smsmith * various OS-specific tasks between the two steps. 21371867Smsmith * 21471867Smsmith ******************************************************************************/ 21571867Smsmith 21671867SmsmithACPI_STATUS 21787031SmsmithAcpiEnterSleepStatePrep ( 218193267Sjkim UINT8 SleepState) 21971867Smsmith{ 220193267Sjkim ACPI_STATUS Status; 221193267Sjkim ACPI_OBJECT_LIST ArgList; 222193267Sjkim ACPI_OBJECT Arg; 22371867Smsmith 22477424Smsmith 225167802Sjkim ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep); 22691116Smsmith 22791116Smsmith 228193267Sjkim /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */ 229193267Sjkim 23099679Siwasaki Status = AcpiGetSleepTypeData (SleepState, 23191116Smsmith &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 23291116Smsmith if (ACPI_FAILURE (Status)) 23371867Smsmith { 23487031Smsmith return_ACPI_STATUS (Status); 23571867Smsmith } 23671867Smsmith 237193267Sjkim /* Execute the _PTS method (Prepare To Sleep) */ 23877424Smsmith 23971867Smsmith ArgList.Count = 1; 24071867Smsmith ArgList.Pointer = &Arg; 24171867Smsmith Arg.Type = ACPI_TYPE_INTEGER; 24271867Smsmith Arg.Integer.Value = SleepState; 24371867Smsmith 244126372Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL); 24591116Smsmith if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 24691116Smsmith { 24791116Smsmith return_ACPI_STATUS (Status); 24891116Smsmith } 24991116Smsmith 250193267Sjkim /* Setup the argument to the _SST method (System STatus) */ 25191116Smsmith 252126372Snjl switch (SleepState) 253126372Snjl { 254126372Snjl case ACPI_STATE_S0: 255126372Snjl Arg.Integer.Value = ACPI_SST_WORKING; 256126372Snjl break; 257126372Snjl 258126372Snjl case ACPI_STATE_S1: 259126372Snjl case ACPI_STATE_S2: 260126372Snjl case ACPI_STATE_S3: 261126372Snjl Arg.Integer.Value = ACPI_SST_SLEEPING; 262126372Snjl break; 263126372Snjl 264126372Snjl case ACPI_STATE_S4: 265126372Snjl Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT; 266126372Snjl break; 267126372Snjl 268126372Snjl default: 269151937Sjkim Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */ 270126372Snjl break; 271126372Snjl } 272126372Snjl 273193267Sjkim /* 274193267Sjkim * Set the system indicators to show the desired sleep state. 275193267Sjkim * _SST is an optional method (return no error if not found) 276193267Sjkim */ 277126372Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 278123315Snjl if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 279123315Snjl { 280167802Sjkim ACPI_EXCEPTION ((AE_INFO, Status, "While executing method _SST")); 281123315Snjl } 282123315Snjl 28387031Smsmith return_ACPI_STATUS (AE_OK); 28487031Smsmith} 28587031Smsmith 286167802SjkimACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep) 28787031Smsmith 288167802Sjkim 289151937Sjkim/******************************************************************************* 29087031Smsmith * 29187031Smsmith * FUNCTION: AcpiEnterSleepState 29287031Smsmith * 29387031Smsmith * PARAMETERS: SleepState - Which sleep state to enter 29487031Smsmith * 29587031Smsmith * RETURN: Status 29687031Smsmith * 297193267Sjkim * DESCRIPTION: Enter a system sleep state 29887031Smsmith * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 29987031Smsmith * 30087031Smsmith ******************************************************************************/ 30187031Smsmith 30287031SmsmithACPI_STATUS 30387031SmsmithAcpiEnterSleepState ( 30491116Smsmith UINT8 SleepState) 30587031Smsmith{ 306193267Sjkim UINT32 Pm1aControl; 307193267Sjkim UINT32 Pm1bControl; 30891116Smsmith ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 30991116Smsmith ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 31099679Siwasaki UINT32 InValue; 311193267Sjkim ACPI_OBJECT_LIST ArgList; 312193267Sjkim ACPI_OBJECT Arg; 313193335Sjkim UINT32 Retry; 31499679Siwasaki ACPI_STATUS Status; 31587031Smsmith 31687031Smsmith 317167802Sjkim ACPI_FUNCTION_TRACE (AcpiEnterSleepState); 31887031Smsmith 31991116Smsmith 32091116Smsmith if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) || 32191116Smsmith (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX)) 32287031Smsmith { 323167802Sjkim ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=%X B=%X", 32491116Smsmith AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB)); 32591116Smsmith return_ACPI_STATUS (AE_AML_OPERAND_VALUE); 32687031Smsmith } 32787031Smsmith 328193267Sjkim SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 32991116Smsmith SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 33071867Smsmith 331128245Snjl /* Clear wake status */ 332128245Snjl 333193267Sjkim Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 334128245Snjl if (ACPI_FAILURE (Status)) 33599679Siwasaki { 336128245Snjl return_ACPI_STATUS (Status); 337128245Snjl } 33878986Smsmith 339129684Snjl /* Clear all fixed and general purpose status bits */ 340129684Snjl 341167802Sjkim Status = AcpiHwClearAcpiStatus (); 342128245Snjl if (ACPI_FAILURE (Status)) 343128245Snjl { 344128245Snjl return_ACPI_STATUS (Status); 345128245Snjl } 34687031Smsmith 347128245Snjl if (SleepState != ACPI_STATE_S5) 348128245Snjl { 349123315Snjl /* Disable BM arbitration */ 350123315Snjl 351193267Sjkim Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1); 352123315Snjl if (ACPI_FAILURE (Status)) 353123315Snjl { 354123315Snjl return_ACPI_STATUS (Status); 355123315Snjl } 35699679Siwasaki } 35799679Siwasaki 358128212Snjl /* 359129684Snjl * 1) Disable/Clear all GPEs 360128212Snjl * 2) Enable all wakeup GPEs 361128212Snjl */ 362151937Sjkim Status = AcpiHwDisableAllGpes (); 36399679Siwasaki if (ACPI_FAILURE (Status)) 36499679Siwasaki { 36599679Siwasaki return_ACPI_STATUS (Status); 36699679Siwasaki } 367129684Snjl AcpiGbl_SystemAwakeAndRunning = FALSE; 36899679Siwasaki 369151937Sjkim Status = AcpiHwEnableAllWakeupGpes (); 370129684Snjl if (ACPI_FAILURE (Status)) 371129684Snjl { 372129684Snjl return_ACPI_STATUS (Status); 373129684Snjl } 374129684Snjl 375193267Sjkim /* Execute the _GTS method (Going To Sleep) */ 376193267Sjkim 377193267Sjkim ArgList.Count = 1; 378193267Sjkim ArgList.Pointer = &Arg; 379193267Sjkim Arg.Type = ACPI_TYPE_INTEGER; 380193267Sjkim Arg.Integer.Value = SleepState; 381193267Sjkim 382193267Sjkim Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL); 383193267Sjkim if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 384193267Sjkim { 385193267Sjkim return_ACPI_STATUS (Status); 386193267Sjkim } 387193267Sjkim 38891116Smsmith /* Get current value of PM1A control */ 38978986Smsmith 390193267Sjkim Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 391193267Sjkim &Pm1aControl); 39299679Siwasaki if (ACPI_FAILURE (Status)) 39399679Siwasaki { 39499679Siwasaki return_ACPI_STATUS (Status); 39599679Siwasaki } 396151937Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 397151937Sjkim "Entering sleep state [S%d]\n", SleepState)); 39882367Smsmith 399193267Sjkim /* Clear the SLP_EN and SLP_TYP fields */ 40082367Smsmith 401193267Sjkim Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 402151937Sjkim SleepEnableRegInfo->AccessBitMask); 403193267Sjkim Pm1bControl = Pm1aControl; 40471867Smsmith 405193267Sjkim /* Insert the SLP_TYP bits */ 40682367Smsmith 407193267Sjkim Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 408193267Sjkim Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 40971867Smsmith 410126372Snjl /* 411126372Snjl * We split the writes of SLP_TYP and SLP_EN to workaround 412126372Snjl * poorly implemented hardware. 413126372Snjl */ 414126372Snjl 415193267Sjkim /* Write #1: write the SLP_TYP data to the PM1 Control registers */ 41671867Smsmith 417193267Sjkim Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 41899679Siwasaki if (ACPI_FAILURE (Status)) 41999679Siwasaki { 42099679Siwasaki return_ACPI_STATUS (Status); 42199679Siwasaki } 42282367Smsmith 423193267Sjkim /* Insert the sleep enable (SLP_EN) bit */ 42499679Siwasaki 425193267Sjkim Pm1aControl |= SleepEnableRegInfo->AccessBitMask; 426193267Sjkim Pm1bControl |= SleepEnableRegInfo->AccessBitMask; 42782367Smsmith 428193267Sjkim /* Flush caches, as per ACPI specification */ 42971867Smsmith 43099679Siwasaki ACPI_FLUSH_CPU_CACHE (); 43180062Smsmith 432193267Sjkim /* Write #2: Write both SLP_TYP + SLP_EN */ 43399679Siwasaki 434193267Sjkim Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 43599679Siwasaki if (ACPI_FAILURE (Status)) 43699679Siwasaki { 43799679Siwasaki return_ACPI_STATUS (Status); 43899679Siwasaki } 43999679Siwasaki 44082367Smsmith if (SleepState > ACPI_STATE_S3) 44182367Smsmith { 44299679Siwasaki /* 443151937Sjkim * We wanted to sleep > S3, but it didn't happen (by virtue of the 444151937Sjkim * fact that we are still executing!) 445123315Snjl * 446151937Sjkim * Wait ten seconds, then try again. This is to get S4/S5 to work on 447151937Sjkim * all machines. 448123315Snjl * 449193267Sjkim * We wait so long to allow chipsets that poll this reg very slowly 450193267Sjkim * to still read the right value. Ideally, this block would go 45199679Siwasaki * away entirely. 45299679Siwasaki */ 45399679Siwasaki AcpiOsStall (10000000); 45482367Smsmith 455193267Sjkim Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL, 45699679Siwasaki SleepEnableRegInfo->AccessBitMask); 45799679Siwasaki if (ACPI_FAILURE (Status)) 45899679Siwasaki { 45999679Siwasaki return_ACPI_STATUS (Status); 46099679Siwasaki } 46180357Speter } 46280062Smsmith 46391116Smsmith /* Wait until we enter sleep state */ 46471867Smsmith 465193335Sjkim Retry = 1000; 466102550Siwasaki do 46783174Smsmith { 468193267Sjkim Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 46999679Siwasaki if (ACPI_FAILURE (Status)) 47099679Siwasaki { 47199679Siwasaki return_ACPI_STATUS (Status); 47299679Siwasaki } 47399679Siwasaki 474193335Sjkim /* 475193335Sjkim * Some BIOSs don't set WAK_STS at all. Give up waiting after 476193335Sjkim * 1000 retries if it still isn't set. 477193335Sjkim */ 478193335Sjkim if (Retry-- == 0) 479193335Sjkim { 480193335Sjkim break; 481193335Sjkim } 482193335Sjkim 48391116Smsmith /* Spin until we wake */ 48482367Smsmith 48599679Siwasaki } while (!InValue); 48699679Siwasaki 48771867Smsmith return_ACPI_STATUS (AE_OK); 48871867Smsmith} 48982367Smsmith 490167802SjkimACPI_EXPORT_SYMBOL (AcpiEnterSleepState) 491114237Snjl 492167802Sjkim 493151937Sjkim/******************************************************************************* 49482367Smsmith * 495114237Snjl * FUNCTION: AcpiEnterSleepStateS4bios 496114237Snjl * 497114237Snjl * PARAMETERS: None 498114237Snjl * 499114237Snjl * RETURN: Status 500114237Snjl * 501114237Snjl * DESCRIPTION: Perform a S4 bios request. 502114237Snjl * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 503114237Snjl * 504114237Snjl ******************************************************************************/ 505114237Snjl 506114237SnjlACPI_STATUS 507114237SnjlAcpiEnterSleepStateS4bios ( 508114237Snjl void) 509114237Snjl{ 510114237Snjl UINT32 InValue; 511114237Snjl ACPI_STATUS Status; 512114237Snjl 513114237Snjl 514167802Sjkim ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios); 515114237Snjl 516123315Snjl 517193267Sjkim /* Clear the wake status bit (PM1) */ 518193267Sjkim 519193267Sjkim Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 520126372Snjl if (ACPI_FAILURE (Status)) 521126372Snjl { 522126372Snjl return_ACPI_STATUS (Status); 523126372Snjl } 524114237Snjl 525167802Sjkim Status = AcpiHwClearAcpiStatus (); 526126372Snjl if (ACPI_FAILURE (Status)) 527126372Snjl { 528126372Snjl return_ACPI_STATUS (Status); 529126372Snjl } 530114237Snjl 531128212Snjl /* 532129684Snjl * 1) Disable/Clear all GPEs 533128212Snjl * 2) Enable all wakeup GPEs 534128212Snjl */ 535151937Sjkim Status = AcpiHwDisableAllGpes (); 536126372Snjl if (ACPI_FAILURE (Status)) 537126372Snjl { 538126372Snjl return_ACPI_STATUS (Status); 539126372Snjl } 540129684Snjl AcpiGbl_SystemAwakeAndRunning = FALSE; 541114237Snjl 542151937Sjkim Status = AcpiHwEnableAllWakeupGpes (); 543129684Snjl if (ACPI_FAILURE (Status)) 544129684Snjl { 545129684Snjl return_ACPI_STATUS (Status); 546129684Snjl } 547129684Snjl 548126372Snjl ACPI_FLUSH_CPU_CACHE (); 549126372Snjl 550193267Sjkim Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 551167802Sjkim (UINT32) AcpiGbl_FADT.S4BiosRequest, 8); 552114237Snjl 553114237Snjl do { 554114237Snjl AcpiOsStall(1000); 555193267Sjkim Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 556114237Snjl if (ACPI_FAILURE (Status)) 557114237Snjl { 558114237Snjl return_ACPI_STATUS (Status); 559114237Snjl } 560114237Snjl } while (!InValue); 561114237Snjl 562114237Snjl return_ACPI_STATUS (AE_OK); 563114237Snjl} 564114237Snjl 565167802SjkimACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios) 566114237Snjl 567167802Sjkim 568151937Sjkim/******************************************************************************* 569114237Snjl * 57082367Smsmith * FUNCTION: AcpiLeaveSleepState 57182367Smsmith * 57282367Smsmith * PARAMETERS: SleepState - Which sleep state we just exited 57382367Smsmith * 57482367Smsmith * RETURN: Status 57582367Smsmith * 57682367Smsmith * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep 577138287Smarks * Called with interrupts ENABLED. 57882367Smsmith * 57982367Smsmith ******************************************************************************/ 58082367Smsmith 58182367SmsmithACPI_STATUS 58282367SmsmithAcpiLeaveSleepState ( 583123315Snjl UINT8 SleepState) 58482367Smsmith{ 585123315Snjl ACPI_OBJECT_LIST ArgList; 586123315Snjl ACPI_OBJECT Arg; 587123315Snjl ACPI_STATUS Status; 588123315Snjl ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 589123315Snjl ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 590193267Sjkim UINT32 Pm1aControl; 591193267Sjkim UINT32 Pm1bControl; 59282367Smsmith 59383174Smsmith 594167802Sjkim ACPI_FUNCTION_TRACE (AcpiLeaveSleepState); 59582367Smsmith 59691116Smsmith 597126372Snjl /* 598126372Snjl * Set SLP_TYPE and SLP_EN to state S0. 599126372Snjl * This is unclear from the ACPI Spec, but it is required 600126372Snjl * by some machines. 601126372Snjl */ 602126372Snjl Status = AcpiGetSleepTypeData (ACPI_STATE_S0, 603126372Snjl &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 604123315Snjl if (ACPI_SUCCESS (Status)) 605123315Snjl { 606193267Sjkim SleepTypeRegInfo = 607193267Sjkim AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 608193267Sjkim SleepEnableRegInfo = 609193267Sjkim AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 610123315Snjl 611126372Snjl /* Get current value of PM1A control */ 612123315Snjl 613193267Sjkim Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 614193267Sjkim &Pm1aControl); 615126372Snjl if (ACPI_SUCCESS (Status)) 616126372Snjl { 617193267Sjkim /* Clear the SLP_EN and SLP_TYP fields */ 618126372Snjl 619193267Sjkim Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 620193267Sjkim SleepEnableRegInfo->AccessBitMask); 621193267Sjkim Pm1bControl = Pm1aControl; 622126372Snjl 623193267Sjkim /* Insert the SLP_TYP bits */ 624126372Snjl 625193267Sjkim Pm1aControl |= (AcpiGbl_SleepTypeA << 626193267Sjkim SleepTypeRegInfo->BitPosition); 627193267Sjkim Pm1bControl |= (AcpiGbl_SleepTypeB << 628193267Sjkim SleepTypeRegInfo->BitPosition); 629126372Snjl 630193267Sjkim /* Write the control registers and ignore any errors */ 631126372Snjl 632193267Sjkim (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 633126372Snjl } 634123315Snjl } 635123315Snjl 63687031Smsmith /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ 63782367Smsmith 63891116Smsmith AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; 63991116Smsmith 64091116Smsmith /* Setup parameter object */ 64191116Smsmith 64282367Smsmith ArgList.Count = 1; 64382367Smsmith ArgList.Pointer = &Arg; 64482367Smsmith Arg.Type = ACPI_TYPE_INTEGER; 64582367Smsmith 64691116Smsmith /* Ignore any errors from these methods */ 64783174Smsmith 648126372Snjl Arg.Integer.Value = ACPI_SST_WAKING; 649126372Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 650123315Snjl if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 651123315Snjl { 652167802Sjkim ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 653123315Snjl } 654123315Snjl 655123315Snjl Arg.Integer.Value = SleepState; 656126372Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL); 65791116Smsmith if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 65891116Smsmith { 659167802Sjkim ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS")); 66091116Smsmith } 66191116Smsmith 662126372Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL); 66391116Smsmith if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 66491116Smsmith { 665167802Sjkim ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK")); 66691116Smsmith } 667128212Snjl /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ 66891116Smsmith 669128212Snjl /* 670128212Snjl * Restore the GPEs: 671129684Snjl * 1) Disable/Clear all GPEs 672128212Snjl * 2) Enable all runtime GPEs 673128212Snjl */ 674151937Sjkim Status = AcpiHwDisableAllGpes (); 67599679Siwasaki if (ACPI_FAILURE (Status)) 67699679Siwasaki { 67799679Siwasaki return_ACPI_STATUS (Status); 67899679Siwasaki } 679129684Snjl AcpiGbl_SystemAwakeAndRunning = TRUE; 68082367Smsmith 681151937Sjkim Status = AcpiHwEnableAllRuntimeGpes (); 682129684Snjl if (ACPI_FAILURE (Status)) 683129684Snjl { 684129684Snjl return_ACPI_STATUS (Status); 685129684Snjl } 686129684Snjl 687126372Snjl /* Enable power button */ 688126372Snjl 689193267Sjkim (void) AcpiWriteBitRegister( 690193267Sjkim AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 691193267Sjkim ACPI_ENABLE_EVENT); 692151937Sjkim 693193267Sjkim (void) AcpiWriteBitRegister( 694193267Sjkim AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 695193267Sjkim ACPI_CLEAR_STATUS); 696126372Snjl 697123315Snjl /* Enable BM arbitration */ 698123315Snjl 699193267Sjkim Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0); 700126372Snjl if (ACPI_FAILURE (Status)) 701126372Snjl { 702126372Snjl return_ACPI_STATUS (Status); 703126372Snjl } 704126372Snjl 705126372Snjl Arg.Integer.Value = ACPI_SST_WORKING; 706126372Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 707126372Snjl if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 708126372Snjl { 709167802Sjkim ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 710126372Snjl } 711126372Snjl 71299679Siwasaki return_ACPI_STATUS (Status); 71382367Smsmith} 714167802Sjkim 715167802SjkimACPI_EXPORT_SYMBOL (AcpiLeaveSleepState) 716167802Sjkim 717