hwsleep.c revision 193267
171867Smsmith 271867Smsmith/****************************************************************************** 371867Smsmith * 471867Smsmith * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface 5128212Snjl * 671867Smsmith *****************************************************************************/ 771867Smsmith 871867Smsmith/****************************************************************************** 971867Smsmith * 1071867Smsmith * 1. Copyright Notice 1171867Smsmith * 1271867Smsmith * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 13126372Snjl * 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 11771867Smsmith#include "acpi.h" 11871867Smsmith#include "accommon.h" 11971867Smsmith 12077424Smsmith#define _COMPONENT ACPI_HARDWARE 12191116Smsmith ACPI_MODULE_NAME ("hwsleep") 12271867Smsmith 12371867Smsmith 124126372Snjl/******************************************************************************* 125126372Snjl * 126126372Snjl * FUNCTION: AcpiSetFirmwareWakingVector 127126372Snjl * 128126372Snjl * PARAMETERS: PhysicalAddress - 32-bit physical address of ACPI real mode 129126372Snjl * entry point. 130126372Snjl * 131126372Snjl * RETURN: Status 132126372Snjl * 133126372Snjl * DESCRIPTION: Sets the 32-bit FirmwareWakingVector field of the FACS 134126372Snjl * 135126372Snjl ******************************************************************************/ 136126372Snjl 13771867SmsmithACPI_STATUS 13871867SmsmithAcpiSetFirmwareWakingVector ( 13971867Smsmith UINT32 PhysicalAddress) 14071867Smsmith{ 14171867Smsmith ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector); 14271867Smsmith 14371867Smsmith 14491116Smsmith /* Set the 32-bit vector */ 14571867Smsmith 14671867Smsmith AcpiGbl_FACS->FirmwareWakingVector = PhysicalAddress; 14771867Smsmith 14871867Smsmith /* Clear the 64-bit vector if it exists */ 14971867Smsmith 15071867Smsmith if ((AcpiGbl_FACS->Length > 32) && (AcpiGbl_FACS->Version >= 1)) 15171867Smsmith { 15271867Smsmith AcpiGbl_FACS->XFirmwareWakingVector = 0; 15371867Smsmith } 15471867Smsmith 15591116Smsmith return_ACPI_STATUS (AE_OK); 15671867Smsmith} 15771867Smsmith 15871867SmsmithACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector) 15971867Smsmith 16091116Smsmith 16171867Smsmith#if ACPI_MACHINE_WIDTH == 64 162102550Siwasaki/******************************************************************************* 16399679Siwasaki * 16471867Smsmith * FUNCTION: AcpiSetFirmwareWakingVector64 16571867Smsmith * 16671867Smsmith * PARAMETERS: PhysicalAddress - 64-bit physical address of ACPI protected 167102550Siwasaki * mode entry point. 16899679Siwasaki * 16971867Smsmith * RETURN: Status 17071867Smsmith * 17171867Smsmith * DESCRIPTION: Sets the 64-bit X_FirmwareWakingVector field of the FACS, if 17271867Smsmith * it exists in the table. This function is intended for use with 17371867Smsmith * 64-bit host operating systems. 17471867Smsmith * 17571867Smsmith ******************************************************************************/ 17671867Smsmith 17771867SmsmithACPI_STATUS 17871867SmsmithAcpiSetFirmwareWakingVector64 ( 17971867Smsmith UINT64 PhysicalAddress) 18071867Smsmith{ 18171867Smsmith ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector64); 18271867Smsmith 18371867Smsmith 18471867Smsmith /* Determine if the 64-bit vector actually exists */ 18591116Smsmith 18671867Smsmith if ((AcpiGbl_FACS->Length <= 32) || (AcpiGbl_FACS->Version < 1)) 18771867Smsmith { 18871867Smsmith return_ACPI_STATUS (AE_NOT_EXIST); 18971867Smsmith } 19071867Smsmith 19171867Smsmith /* Clear 32-bit vector, set the 64-bit X_ vector */ 19271867Smsmith 19371867Smsmith AcpiGbl_FACS->FirmwareWakingVector = 0; 19491116Smsmith AcpiGbl_FACS->XFirmwareWakingVector = PhysicalAddress; 19571867Smsmith return_ACPI_STATUS (AE_OK); 19671867Smsmith} 19771867Smsmith 19871867SmsmithACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector64) 19971867Smsmith#endif 20071867Smsmith 20171867Smsmith/******************************************************************************* 20271867Smsmith * 20371867Smsmith * FUNCTION: AcpiEnterSleepStatePrep 20491116Smsmith * 20571867Smsmith * PARAMETERS: SleepState - Which sleep state to enter 206102550Siwasaki * 20799679Siwasaki * RETURN: Status 20871867Smsmith * 20971867Smsmith * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) 21071867Smsmith * This function must execute with interrupts enabled. 211102550Siwasaki * We break sleeping into 2 stages so that OSPM can handle 21299679Siwasaki * various OS-specific tasks between the two steps. 21371867Smsmith * 21471867Smsmith ******************************************************************************/ 21571867Smsmith 21671867SmsmithACPI_STATUS 21771867SmsmithAcpiEnterSleepStatePrep ( 21887031Smsmith UINT8 SleepState) 21971867Smsmith{ 22071867Smsmith ACPI_STATUS Status; 22187031Smsmith ACPI_OBJECT_LIST ArgList; 22271867Smsmith ACPI_OBJECT Arg; 22371867Smsmith 22471867Smsmith 22571867Smsmith ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep); 22671867Smsmith 22787031Smsmith 22887031Smsmith /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */ 22987031Smsmith 23087031Smsmith Status = AcpiGetSleepTypeData (SleepState, 23171867Smsmith &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 23271867Smsmith if (ACPI_FAILURE (Status)) 23371867Smsmith { 23471867Smsmith return_ACPI_STATUS (Status); 23587031Smsmith } 23677424Smsmith 23771867Smsmith /* Execute the _PTS method (Prepare To Sleep) */ 23877424Smsmith 23977424Smsmith ArgList.Count = 1; 24077424Smsmith ArgList.Pointer = &Arg; 24171867Smsmith Arg.Type = ACPI_TYPE_INTEGER; 24277424Smsmith Arg.Integer.Value = SleepState; 24391116Smsmith 24491116Smsmith Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL); 24591116Smsmith if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 24671867Smsmith { 24771867Smsmith return_ACPI_STATUS (Status); 24871867Smsmith } 24999679Siwasaki 25091116Smsmith /* Setup the argument to the _SST method (System STatus) */ 25191116Smsmith 25271867Smsmith switch (SleepState) 25387031Smsmith { 25471867Smsmith case ACPI_STATE_S0: 25571867Smsmith Arg.Integer.Value = ACPI_SST_WORKING; 25691116Smsmith break; 25777424Smsmith 25871867Smsmith case ACPI_STATE_S1: 25971867Smsmith case ACPI_STATE_S2: 26071867Smsmith case ACPI_STATE_S3: 26171867Smsmith Arg.Integer.Value = ACPI_SST_SLEEPING; 26271867Smsmith break; 26371867Smsmith 26491116Smsmith case ACPI_STATE_S4: 26577424Smsmith Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT; 266126372Snjl break; 26791116Smsmith 26891116Smsmith default: 26991116Smsmith Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */ 27091116Smsmith break; 27191116Smsmith } 272126372Snjl 27391116Smsmith /* 27491116Smsmith * Set the system indicators to show the desired sleep state. 27591116Smsmith * _SST is an optional method (return no error if not found) 27691116Smsmith */ 27791116Smsmith Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 278126372Snjl if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 279126372Snjl { 280126372Snjl ACPI_EXCEPTION ((AE_INFO, Status, "While executing method _SST")); 281126372Snjl } 282126372Snjl 283126372Snjl return_ACPI_STATUS (AE_OK); 284126372Snjl} 285126372Snjl 286126372SnjlACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep) 287126372Snjl 288126372Snjl 289126372Snjl/******************************************************************************* 290126372Snjl * 291126372Snjl * FUNCTION: AcpiEnterSleepState 292126372Snjl * 293126372Snjl * PARAMETERS: SleepState - Which sleep state to enter 294126372Snjl * 295126372Snjl * RETURN: Status 296126372Snjl * 297126372Snjl * DESCRIPTION: Enter a system sleep state 298126372Snjl * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 299126372Snjl * 300126372Snjl ******************************************************************************/ 301123315Snjl 302123315SnjlACPI_STATUS 303126372SnjlAcpiEnterSleepState ( 304123315Snjl UINT8 SleepState) 305123315Snjl{ 306123315Snjl UINT32 Pm1aControl; 307123315Snjl UINT32 Pm1bControl; 308123315Snjl ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 30987031Smsmith ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 31087031Smsmith UINT32 InValue; 31187031Smsmith ACPI_OBJECT_LIST ArgList; 31287031Smsmith ACPI_OBJECT Arg; 31387031Smsmith ACPI_STATUS Status; 31487031Smsmith 31587031Smsmith 31687031Smsmith ACPI_FUNCTION_TRACE (AcpiEnterSleepState); 31787031Smsmith 31887031Smsmith 31987031Smsmith if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) || 32087031Smsmith (AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX)) 32187031Smsmith { 32287031Smsmith ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=%X B=%X", 32387031Smsmith AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB)); 32487031Smsmith return_ACPI_STATUS (AE_AML_OPERAND_VALUE); 32587031Smsmith } 32687031Smsmith 32787031Smsmith SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 32891116Smsmith SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 32987031Smsmith 33099679Siwasaki /* Clear wake status */ 33199679Siwasaki 33291116Smsmith Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 33391116Smsmith if (ACPI_FAILURE (Status)) 33499679Siwasaki { 33599679Siwasaki return_ACPI_STATUS (Status); 33687031Smsmith } 33787031Smsmith 33891116Smsmith /* Clear all fixed and general purpose status bits */ 33987031Smsmith 34091116Smsmith Status = AcpiHwClearAcpiStatus (); 34191116Smsmith if (ACPI_FAILURE (Status)) 34291116Smsmith { 34387031Smsmith return_ACPI_STATUS (Status); 34499679Siwasaki } 34591116Smsmith 34691116Smsmith if (SleepState != ACPI_STATE_S5) 34787031Smsmith { 34887031Smsmith /* Disable BM arbitration */ 34991116Smsmith 35091116Smsmith Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 1); 35171867Smsmith if (ACPI_FAILURE (Status)) 352128245Snjl { 353128245Snjl return_ACPI_STATUS (Status); 354128245Snjl } 355128245Snjl } 35699679Siwasaki 357128245Snjl /* 358128245Snjl * 1) Disable/Clear all GPEs 35978986Smsmith * 2) Enable all wakeup GPEs 360128245Snjl */ 361128245Snjl Status = AcpiHwDisableAllGpes (); 362128245Snjl if (ACPI_FAILURE (Status)) 363128245Snjl { 364128245Snjl return_ACPI_STATUS (Status); 36587031Smsmith } 366128245Snjl AcpiGbl_SystemAwakeAndRunning = FALSE; 367128245Snjl 368123315Snjl Status = AcpiHwEnableAllWakeupGpes (); 369123315Snjl if (ACPI_FAILURE (Status)) 370123315Snjl { 371123315Snjl return_ACPI_STATUS (Status); 372123315Snjl } 373123315Snjl 374123315Snjl /* Execute the _GTS method (Going To Sleep) */ 37599679Siwasaki 37699679Siwasaki ArgList.Count = 1; 377128212Snjl ArgList.Pointer = &Arg; 378128212Snjl Arg.Type = ACPI_TYPE_INTEGER; 379128212Snjl Arg.Integer.Value = SleepState; 380128212Snjl 381128212Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL); 38299679Siwasaki if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 38399679Siwasaki { 38499679Siwasaki return_ACPI_STATUS (Status); 38599679Siwasaki } 38699679Siwasaki 38791116Smsmith /* Get current value of PM1A control */ 38878986Smsmith 389114237Snjl Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 39099679Siwasaki &Pm1aControl); 39199679Siwasaki if (ACPI_FAILURE (Status)) 39299679Siwasaki { 39399679Siwasaki return_ACPI_STATUS (Status); 394114237Snjl } 39582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INIT, 39691116Smsmith "Entering sleep state [S%d]\n", SleepState)); 39782367Smsmith 39891116Smsmith /* Clear the SLP_EN and SLP_TYP fields */ 39971867Smsmith 40071867Smsmith Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 40191116Smsmith SleepEnableRegInfo->AccessBitMask); 40282367Smsmith Pm1bControl = Pm1aControl; 40391116Smsmith 40491116Smsmith /* Insert the SLP_TYP bits */ 40571867Smsmith 406126372Snjl Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition); 407126372Snjl Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition); 408126372Snjl 409126372Snjl /* 410126372Snjl * We split the writes of SLP_TYP and SLP_EN to workaround 41191116Smsmith * poorly implemented hardware. 41271867Smsmith */ 413114237Snjl 41499679Siwasaki /* Write #1: write the SLP_TYP data to the PM1 Control registers */ 41599679Siwasaki 41699679Siwasaki Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 41799679Siwasaki if (ACPI_FAILURE (Status)) 41882367Smsmith { 419114237Snjl return_ACPI_STATUS (Status); 42099679Siwasaki } 42199679Siwasaki 42299679Siwasaki /* Insert the sleep enable (SLP_EN) bit */ 42399679Siwasaki 42499679Siwasaki Pm1aControl |= SleepEnableRegInfo->AccessBitMask; 42591116Smsmith Pm1bControl |= SleepEnableRegInfo->AccessBitMask; 42682367Smsmith 42791116Smsmith /* Flush caches, as per ACPI specification */ 42891116Smsmith 42971867Smsmith ACPI_FLUSH_CPU_CACHE (); 43091116Smsmith 43171867Smsmith /* Write #2: Write both SLP_TYP + SLP_EN */ 43299679Siwasaki 43380062Smsmith Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 434114237Snjl if (ACPI_FAILURE (Status)) 43599679Siwasaki { 43699679Siwasaki return_ACPI_STATUS (Status); 43799679Siwasaki } 43899679Siwasaki 43999679Siwasaki if (SleepState > ACPI_STATE_S3) 440114237Snjl { 44199679Siwasaki /* 44299679Siwasaki * We wanted to sleep > S3, but it didn't happen (by virtue of the 44399679Siwasaki * fact that we are still executing!) 44499679Siwasaki * 44599679Siwasaki * Wait ten seconds, then try again. This is to get S4/S5 to work on 44682367Smsmith * all machines. 44782367Smsmith * 44899679Siwasaki * We wait so long to allow chipsets that poll this reg very slowly 449123315Snjl * to still read the right value. Ideally, this block would go 450123315Snjl * away entirely. 451123315Snjl */ 452123315Snjl AcpiOsStall (10000000); 453123315Snjl 45499679Siwasaki Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL, 455126372Snjl SleepEnableRegInfo->AccessBitMask); 45699679Siwasaki if (ACPI_FAILURE (Status)) 45799679Siwasaki { 45899679Siwasaki return_ACPI_STATUS (Status); 45982367Smsmith } 460114237Snjl } 46199679Siwasaki 46299679Siwasaki /* Wait until we enter sleep state */ 46399679Siwasaki 46499679Siwasaki do 46599679Siwasaki { 46680357Speter Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 46780062Smsmith if (ACPI_FAILURE (Status)) 46891116Smsmith { 46971867Smsmith return_ACPI_STATUS (Status); 470102550Siwasaki } 47183174Smsmith 472114237Snjl /* Spin until we wake */ 47399679Siwasaki 47499679Siwasaki } while (!InValue); 47599679Siwasaki 47699679Siwasaki return_ACPI_STATUS (AE_OK); 47799679Siwasaki} 47891116Smsmith 47982367SmsmithACPI_EXPORT_SYMBOL (AcpiEnterSleepState) 48099679Siwasaki 48199679Siwasaki 48271867Smsmith/******************************************************************************* 48371867Smsmith * 48482367Smsmith * FUNCTION: AcpiEnterSleepStateS4bios 485114237Snjl * 48682367Smsmith * PARAMETERS: None 48782367Smsmith * 488114237Snjl * RETURN: Status 489114237Snjl * 490114237Snjl * DESCRIPTION: Perform a S4 bios request. 491114237Snjl * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 492114237Snjl * 493114237Snjl ******************************************************************************/ 494114237Snjl 495114237SnjlACPI_STATUS 496114237SnjlAcpiEnterSleepStateS4bios ( 497114237Snjl void) 498114237Snjl{ 499114237Snjl UINT32 InValue; 500114237Snjl ACPI_STATUS Status; 501114237Snjl 502114237Snjl 503114237Snjl ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios); 504114237Snjl 505114237Snjl 506114237Snjl /* Clear the wake status bit (PM1) */ 507114237Snjl 508114237Snjl Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 509123315Snjl if (ACPI_FAILURE (Status)) 510126372Snjl { 511126372Snjl return_ACPI_STATUS (Status); 512126372Snjl } 513126372Snjl 514126372Snjl Status = AcpiHwClearAcpiStatus (); 515114237Snjl if (ACPI_FAILURE (Status)) 516126372Snjl { 517126372Snjl return_ACPI_STATUS (Status); 518126372Snjl } 519126372Snjl 520126372Snjl /* 521114237Snjl * 1) Disable/Clear all GPEs 522128212Snjl * 2) Enable all wakeup GPEs 523128212Snjl */ 524128212Snjl Status = AcpiHwDisableAllGpes (); 525128212Snjl if (ACPI_FAILURE (Status)) 526128212Snjl { 527126372Snjl return_ACPI_STATUS (Status); 528126372Snjl } 529126372Snjl AcpiGbl_SystemAwakeAndRunning = FALSE; 530126372Snjl 531114237Snjl Status = AcpiHwEnableAllWakeupGpes (); 532126372Snjl if (ACPI_FAILURE (Status)) 533126372Snjl { 534117521Snjl return_ACPI_STATUS (Status); 535114237Snjl } 536114237Snjl 537114237Snjl ACPI_FLUSH_CPU_CACHE (); 538114237Snjl 539114237Snjl Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 540114237Snjl (UINT32) AcpiGbl_FADT.S4BiosRequest, 8); 541114237Snjl 542114237Snjl do { 543114237Snjl AcpiOsStall(1000); 544114237Snjl Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue); 545114237Snjl if (ACPI_FAILURE (Status)) 546114237Snjl { 547114237Snjl return_ACPI_STATUS (Status); 548114237Snjl } 549114237Snjl } while (!InValue); 550114237Snjl 55182367Smsmith return_ACPI_STATUS (AE_OK); 55282367Smsmith} 55382367Smsmith 55482367SmsmithACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios) 55582367Smsmith 55682367Smsmith 55782367Smsmith/******************************************************************************* 55882367Smsmith * 55982367Smsmith * FUNCTION: AcpiLeaveSleepState 56082367Smsmith * 56182367Smsmith * PARAMETERS: SleepState - Which sleep state we just exited 56282367Smsmith * 563123315Snjl * RETURN: Status 56482367Smsmith * 565123315Snjl * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep 566123315Snjl * Called with interrupts ENABLED. 567123315Snjl * 568123315Snjl ******************************************************************************/ 569123315Snjl 570126372SnjlACPI_STATUS 571126372SnjlAcpiLeaveSleepState ( 57282367Smsmith UINT8 SleepState) 57383174Smsmith{ 57491116Smsmith ACPI_OBJECT_LIST ArgList; 57582367Smsmith ACPI_OBJECT Arg; 57691116Smsmith ACPI_STATUS Status; 577126372Snjl ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo; 578126372Snjl ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo; 579126372Snjl UINT32 Pm1aControl; 580126372Snjl UINT32 Pm1bControl; 581126372Snjl 582126372Snjl 583126372Snjl ACPI_FUNCTION_TRACE (AcpiLeaveSleepState); 584123315Snjl 585123315Snjl 586126372Snjl /* 587126372Snjl * Set SLP_TYPE and SLP_EN to state S0. 588123315Snjl * This is unclear from the ACPI Spec, but it is required 589126372Snjl * by some machines. 590123315Snjl */ 591126372Snjl Status = AcpiGetSleepTypeData (ACPI_STATE_S0, 592126372Snjl &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); 593126372Snjl if (ACPI_SUCCESS (Status)) 594126372Snjl { 595126372Snjl SleepTypeRegInfo = 596126372Snjl AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE); 597126372Snjl SleepEnableRegInfo = 598126372Snjl AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE); 599126372Snjl 600126372Snjl /* Get current value of PM1A control */ 601126372Snjl 602126372Snjl Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL, 603126372Snjl &Pm1aControl); 604126372Snjl if (ACPI_SUCCESS (Status)) 605126372Snjl { 606126372Snjl /* Clear the SLP_EN and SLP_TYP fields */ 607126372Snjl 608126372Snjl Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask | 609126372Snjl SleepEnableRegInfo->AccessBitMask); 610126372Snjl Pm1bControl = Pm1aControl; 611126372Snjl 612126372Snjl /* Insert the SLP_TYP bits */ 613123315Snjl 614123315Snjl Pm1aControl |= (AcpiGbl_SleepTypeA << 61587031Smsmith SleepTypeRegInfo->BitPosition); 61682367Smsmith Pm1bControl |= (AcpiGbl_SleepTypeB << 61791116Smsmith SleepTypeRegInfo->BitPosition); 61891116Smsmith 61991116Smsmith /* Write the control registers and ignore any errors */ 62091116Smsmith 62182367Smsmith (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl); 62282367Smsmith } 62382367Smsmith } 62482367Smsmith 62591116Smsmith /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ 62683174Smsmith 627126372Snjl AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; 628126372Snjl 629123315Snjl /* Setup parameter object */ 630123315Snjl 631123315Snjl ArgList.Count = 1; 632123315Snjl ArgList.Pointer = &Arg; 633123315Snjl Arg.Type = ACPI_TYPE_INTEGER; 634123315Snjl 635126372Snjl /* Ignore any errors from these methods */ 63691116Smsmith 63791116Smsmith Arg.Integer.Value = ACPI_SST_WAKING; 63891116Smsmith Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 63991116Smsmith if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 64091116Smsmith { 641126372Snjl ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 64291116Smsmith } 64391116Smsmith 64491116Smsmith Arg.Integer.Value = SleepState; 64591116Smsmith Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL); 646128212Snjl if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 64791116Smsmith { 648128212Snjl ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS")); 649128212Snjl } 650128212Snjl 651128212Snjl Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL); 652128212Snjl if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 653128212Snjl { 65499679Siwasaki ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK")); 65599679Siwasaki } 65699679Siwasaki /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ 65799679Siwasaki 65882367Smsmith /* 659126372Snjl * Restore the GPEs: 660126372Snjl * 1) Disable/Clear all GPEs 661126372Snjl * 2) Enable all runtime GPEs 662126372Snjl */ 663126372Snjl Status = AcpiHwDisableAllGpes (); 664126372Snjl if (ACPI_FAILURE (Status)) 665126372Snjl { 666123315Snjl return_ACPI_STATUS (Status); 667123315Snjl } 66899679Siwasaki AcpiGbl_SystemAwakeAndRunning = TRUE; 669126372Snjl 670126372Snjl Status = AcpiHwEnableAllRuntimeGpes (); 671126372Snjl if (ACPI_FAILURE (Status)) 672126372Snjl { 673126372Snjl return_ACPI_STATUS (Status); 674126372Snjl } 675126372Snjl 676126372Snjl /* Enable power button */ 677126372Snjl 678126372Snjl (void) AcpiWriteBitRegister( 679126372Snjl AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 680126372Snjl ACPI_ENABLE_EVENT); 68199679Siwasaki 68282367Smsmith (void) AcpiWriteBitRegister( 683 AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 684 ACPI_CLEAR_STATUS); 685 686 /* Enable BM arbitration */ 687 688 Status = AcpiWriteBitRegister (ACPI_BITREG_ARB_DISABLE, 0); 689 if (ACPI_FAILURE (Status)) 690 { 691 return_ACPI_STATUS (Status); 692 } 693 694 Arg.Integer.Value = ACPI_SST_WORKING; 695 Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL); 696 if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) 697 { 698 ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST")); 699 } 700 701 return_ACPI_STATUS (Status); 702} 703 704ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState) 705 706