hwacpi.c revision 193341
171867Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 471867Smsmith * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface 567754Smsmith * 667754Smsmith *****************************************************************************/ 767754Smsmith 867754Smsmith/****************************************************************************** 967754Smsmith * 1067754Smsmith * 1. Copyright Notice 1167754Smsmith * 12193267Sjkim * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 1370243Smsmith * All rights reserved. 1467754Smsmith * 1567754Smsmith * 2. License 1667754Smsmith * 1767754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1867754Smsmith * rights. You may have additional license terms from the party that provided 1967754Smsmith * you this software, covering your right to use that party's intellectual 2067754Smsmith * property rights. 2167754Smsmith * 2267754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2367754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2467754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2567754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2667754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2767754Smsmith * Code in any form, with the right to sublicense such rights; and 2867754Smsmith * 2967754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3067754Smsmith * license (with the right to sublicense), under only those claims of Intel 3167754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3267754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3367754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3467754Smsmith * license, and in no event shall the patent license extend to any additions 3567754Smsmith * to or modifications of the Original Intel Code. No other license or right 3667754Smsmith * is granted directly or by implication, estoppel or otherwise; 3767754Smsmith * 3867754Smsmith * The above copyright and patent license is granted only if the following 3967754Smsmith * conditions are met: 4067754Smsmith * 4167754Smsmith * 3. Conditions 4267754Smsmith * 4367754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4467754Smsmith * Redistribution of source code of any substantial portion of the Covered 4567754Smsmith * Code or modification with rights to further distribute source must include 4667754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4767754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4867754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4967754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5067754Smsmith * Code and the date of any change. Licensee must include in that file the 5167754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5267754Smsmith * must include a prominent statement that the modification is derived, 5367754Smsmith * directly or indirectly, from Original Intel Code. 5467754Smsmith * 5567754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5667754Smsmith * Redistribution of source code of any substantial portion of the Covered 5767754Smsmith * Code or modification without rights to further distribute source must 5867754Smsmith * include the following Disclaimer and Export Compliance provision in the 5967754Smsmith * documentation and/or other materials provided with distribution. In 6067754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6167754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6267754Smsmith * license from Licensee to its licensee is limited to the intellectual 6367754Smsmith * property embodied in the software Licensee provides to its licensee, and 6467754Smsmith * not to intellectual property embodied in modifications its licensee may 6567754Smsmith * make. 6667754Smsmith * 6767754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6867754Smsmith * substantial portion of the Covered Code or modification must reproduce the 6967754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7067754Smsmith * provision in the documentation and/or other materials provided with the 7167754Smsmith * distribution. 7267754Smsmith * 7367754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7467754Smsmith * Intel Code. 7567754Smsmith * 7667754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7767754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7867754Smsmith * other dealings in products derived from or relating to the Covered Code 7967754Smsmith * without prior written authorization from Intel. 8067754Smsmith * 8167754Smsmith * 4. Disclaimer and Export Compliance 8267754Smsmith * 8367754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8467754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8567754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8667754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8767754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8867754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8967754Smsmith * PARTICULAR PURPOSE. 9067754Smsmith * 9167754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9267754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9367754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9467754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9567754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9667754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9767754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9867754Smsmith * LIMITED REMEDY. 9967754Smsmith * 10067754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10167754Smsmith * software or system incorporating such software without first obtaining any 10267754Smsmith * required license or other approval from the U. S. Department of Commerce or 10367754Smsmith * any other agency or department of the United States Government. In the 10467754Smsmith * event Licensee exports any such software from the United States or 10567754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10667754Smsmith * ensure that the distribution and export/re-export of the software is in 10767754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10867754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10967754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11067754Smsmith * software, or service, directly or indirectly, to any country for which the 11167754Smsmith * United States government or any agency thereof requires an export license, 11267754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11367754Smsmith * such license, approval or letter. 11467754Smsmith * 11567754Smsmith *****************************************************************************/ 11667754Smsmith 11767754Smsmith#define __HWACPI_C__ 11867754Smsmith 119193341Sjkim#include <contrib/dev/acpica/include/acpi.h> 120193341Sjkim#include <contrib/dev/acpica/include/accommon.h> 12167754Smsmith 12267754Smsmith 12377424Smsmith#define _COMPONENT ACPI_HARDWARE 12491116Smsmith ACPI_MODULE_NAME ("hwacpi") 12567754Smsmith 12667754Smsmith 12767754Smsmith/****************************************************************************** 12867754Smsmith * 12967754Smsmith * FUNCTION: AcpiHwSetMode 13067754Smsmith * 13167754Smsmith * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 13267754Smsmith * 13367754Smsmith * RETURN: Status 13467754Smsmith * 13591116Smsmith * DESCRIPTION: Transitions the system into the requested mode. 13667754Smsmith * 13767754Smsmith ******************************************************************************/ 13867754Smsmith 13967754SmsmithACPI_STATUS 14067754SmsmithAcpiHwSetMode ( 14167754Smsmith UINT32 Mode) 14267754Smsmith{ 14367754Smsmith 14499679Siwasaki ACPI_STATUS Status; 14599679Siwasaki UINT32 Retry; 14667754Smsmith 14783174Smsmith 148167802Sjkim ACPI_FUNCTION_TRACE (HwSetMode); 14967754Smsmith 150102550Siwasaki /* 151102550Siwasaki * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 152102550Siwasaki * system does not support mode transition. 153102550Siwasaki */ 154167802Sjkim if (!AcpiGbl_FADT.SmiCommand) 155102550Siwasaki { 156167802Sjkim ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed")); 157102550Siwasaki return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 158102550Siwasaki } 159102550Siwasaki 160102550Siwasaki /* 161102550Siwasaki * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE 162102550Siwasaki * in FADT: If it is zero, enabling or disabling is not supported. 163102550Siwasaki * As old systems may have used zero for mode transition, 164102550Siwasaki * we make sure both the numbers are zero to determine these 165102550Siwasaki * transitions are not supported. 166102550Siwasaki */ 167167802Sjkim if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable) 168102550Siwasaki { 169167802Sjkim ACPI_ERROR ((AE_INFO, 170193267Sjkim "No ACPI mode transition supported in this system " 171193267Sjkim "(enable/disable both zero)")); 172102550Siwasaki return_ACPI_STATUS (AE_OK); 173102550Siwasaki } 174102550Siwasaki 17599679Siwasaki switch (Mode) 17699679Siwasaki { 17799679Siwasaki case ACPI_SYS_MODE_ACPI: 17867754Smsmith 17967754Smsmith /* BIOS should have disabled ALL fixed and GP events */ 18067754Smsmith 181193267Sjkim Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 182167802Sjkim (UINT32) AcpiGbl_FADT.AcpiEnable, 8); 18382367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); 18499679Siwasaki break; 18599679Siwasaki 18699679Siwasaki case ACPI_SYS_MODE_LEGACY: 18799679Siwasaki 18867754Smsmith /* 18967754Smsmith * BIOS should clear all fixed status bits and restore fixed event 19067754Smsmith * enable bits to default 19167754Smsmith */ 192193267Sjkim Status = AcpiHwWritePort (AcpiGbl_FADT.SmiCommand, 193167802Sjkim (UINT32) AcpiGbl_FADT.AcpiDisable, 8); 19482367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 19582367Smsmith "Attempting to enable Legacy (non-ACPI) mode\n")); 19699679Siwasaki break; 19799679Siwasaki 19899679Siwasaki default: 19999679Siwasaki return_ACPI_STATUS (AE_BAD_PARAMETER); 20067754Smsmith } 20167754Smsmith 20299679Siwasaki if (ACPI_FAILURE (Status)) 20399679Siwasaki { 204167802Sjkim ACPI_EXCEPTION ((AE_INFO, Status, 205167802Sjkim "Could not write ACPI mode change")); 20699679Siwasaki return_ACPI_STATUS (Status); 20799679Siwasaki } 20883174Smsmith 20999679Siwasaki /* 21099679Siwasaki * Some hardware takes a LONG time to switch modes. Give them 3 sec to 21199679Siwasaki * do so, but allow faster systems to proceed more quickly. 21299679Siwasaki */ 21399679Siwasaki Retry = 3000; 21499679Siwasaki while (Retry) 21599679Siwasaki { 216102550Siwasaki if (AcpiHwGetMode() == Mode) 217102550Siwasaki { 218151937Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", 219151937Sjkim Mode)); 220123315Snjl return_ACPI_STATUS (AE_OK); 22199679Siwasaki } 222102550Siwasaki AcpiOsStall(1000); 22399679Siwasaki Retry--; 22467754Smsmith } 22567754Smsmith 226167802Sjkim ACPI_ERROR ((AE_INFO, "Hardware did not change modes")); 227123315Snjl return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 22867754Smsmith} 22967754Smsmith 23067754Smsmith 231151937Sjkim/******************************************************************************* 23267754Smsmith * 23367754Smsmith * FUNCTION: AcpiHwGetMode 23467754Smsmith * 23567754Smsmith * PARAMETERS: none 23667754Smsmith * 23767754Smsmith * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 23867754Smsmith * 23967754Smsmith * DESCRIPTION: Return current operating state of system. Determined by 24067754Smsmith * querying the SCI_EN bit. 24167754Smsmith * 24267754Smsmith ******************************************************************************/ 24367754Smsmith 24467754SmsmithUINT32 245151937SjkimAcpiHwGetMode ( 246151937Sjkim void) 24767754Smsmith{ 24899679Siwasaki ACPI_STATUS Status; 24999679Siwasaki UINT32 Value; 25067754Smsmith 25199679Siwasaki 252167802Sjkim ACPI_FUNCTION_TRACE (HwGetMode); 25367754Smsmith 254123315Snjl 255123315Snjl /* 256123315Snjl * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 257123315Snjl * system does not support mode transition. 258123315Snjl */ 259167802Sjkim if (!AcpiGbl_FADT.SmiCommand) 260123315Snjl { 261151937Sjkim return_UINT32 (ACPI_SYS_MODE_ACPI); 262123315Snjl } 263123315Snjl 264193267Sjkim Status = AcpiReadBitRegister (ACPI_BITREG_SCI_ENABLE, &Value); 26599679Siwasaki if (ACPI_FAILURE (Status)) 26699679Siwasaki { 267151937Sjkim return_UINT32 (ACPI_SYS_MODE_LEGACY); 26899679Siwasaki } 26967754Smsmith 27099679Siwasaki if (Value) 27167754Smsmith { 272151937Sjkim return_UINT32 (ACPI_SYS_MODE_ACPI); 27367754Smsmith } 27467754Smsmith else 27567754Smsmith { 276151937Sjkim return_UINT32 (ACPI_SYS_MODE_LEGACY); 27767754Smsmith } 27867754Smsmith} 279