hwacpi.c revision 123315
171867Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 471867Smsmith * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface 5123315Snjl * $Revision: 65 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 13114237Snjl * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp. 1470243Smsmith * All rights reserved. 1567754Smsmith * 1667754Smsmith * 2. License 1767754Smsmith * 1867754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1967754Smsmith * rights. You may have additional license terms from the party that provided 2067754Smsmith * you this software, covering your right to use that party's intellectual 2167754Smsmith * property rights. 2267754Smsmith * 2367754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2467754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2567754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2667754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2767754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2867754Smsmith * Code in any form, with the right to sublicense such rights; and 2967754Smsmith * 3067754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3167754Smsmith * license (with the right to sublicense), under only those claims of Intel 3267754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3367754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3467754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3567754Smsmith * license, and in no event shall the patent license extend to any additions 3667754Smsmith * to or modifications of the Original Intel Code. No other license or right 3767754Smsmith * is granted directly or by implication, estoppel or otherwise; 3867754Smsmith * 3967754Smsmith * The above copyright and patent license is granted only if the following 4067754Smsmith * conditions are met: 4167754Smsmith * 4267754Smsmith * 3. Conditions 4367754Smsmith * 4467754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4567754Smsmith * Redistribution of source code of any substantial portion of the Covered 4667754Smsmith * Code or modification with rights to further distribute source must include 4767754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4867754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4967754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 5067754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5167754Smsmith * Code and the date of any change. Licensee must include in that file the 5267754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5367754Smsmith * must include a prominent statement that the modification is derived, 5467754Smsmith * directly or indirectly, from Original Intel Code. 5567754Smsmith * 5667754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5767754Smsmith * Redistribution of source code of any substantial portion of the Covered 5867754Smsmith * Code or modification without rights to further distribute source must 5967754Smsmith * include the following Disclaimer and Export Compliance provision in the 6067754Smsmith * documentation and/or other materials provided with distribution. In 6167754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6267754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6367754Smsmith * license from Licensee to its licensee is limited to the intellectual 6467754Smsmith * property embodied in the software Licensee provides to its licensee, and 6567754Smsmith * not to intellectual property embodied in modifications its licensee may 6667754Smsmith * make. 6767754Smsmith * 6867754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6967754Smsmith * substantial portion of the Covered Code or modification must reproduce the 7067754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7167754Smsmith * provision in the documentation and/or other materials provided with the 7267754Smsmith * distribution. 7367754Smsmith * 7467754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7567754Smsmith * Intel Code. 7667754Smsmith * 7767754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7867754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7967754Smsmith * other dealings in products derived from or relating to the Covered Code 8067754Smsmith * without prior written authorization from Intel. 8167754Smsmith * 8267754Smsmith * 4. Disclaimer and Export Compliance 8367754Smsmith * 8467754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8567754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8667754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8767754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8867754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8967754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 9067754Smsmith * PARTICULAR PURPOSE. 9167754Smsmith * 9267754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9367754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9467754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9567754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9667754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9767754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9867754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9967754Smsmith * LIMITED REMEDY. 10067754Smsmith * 10167754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10267754Smsmith * software or system incorporating such software without first obtaining any 10367754Smsmith * required license or other approval from the U. S. Department of Commerce or 10467754Smsmith * any other agency or department of the United States Government. In the 10567754Smsmith * event Licensee exports any such software from the United States or 10667754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10767754Smsmith * ensure that the distribution and export/re-export of the software is in 10867754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10967754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 11067754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11167754Smsmith * software, or service, directly or indirectly, to any country for which the 11267754Smsmith * United States government or any agency thereof requires an export license, 11367754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11467754Smsmith * such license, approval or letter. 11567754Smsmith * 11667754Smsmith *****************************************************************************/ 11767754Smsmith 11867754Smsmith#define __HWACPI_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith 12267754Smsmith 12377424Smsmith#define _COMPONENT ACPI_HARDWARE 12491116Smsmith ACPI_MODULE_NAME ("hwacpi") 12567754Smsmith 12667754Smsmith 12767754Smsmith/****************************************************************************** 12867754Smsmith * 12967754Smsmith * FUNCTION: AcpiHwInitialize 13067754Smsmith * 13167754Smsmith * PARAMETERS: None 13267754Smsmith * 13367754Smsmith * RETURN: Status 13467754Smsmith * 13567754Smsmith * DESCRIPTION: Initialize and validate various ACPI registers 13667754Smsmith * 13767754Smsmith ******************************************************************************/ 13867754Smsmith 13967754SmsmithACPI_STATUS 14067754SmsmithAcpiHwInitialize ( 14167754Smsmith void) 14267754Smsmith{ 14391116Smsmith ACPI_STATUS Status; 14467754Smsmith 14567754Smsmith 14691116Smsmith ACPI_FUNCTION_TRACE ("HwInitialize"); 14767754Smsmith 14867754Smsmith 14967754Smsmith /* We must have the ACPI tables by the time we get here */ 15067754Smsmith 15169450Smsmith if (!AcpiGbl_FADT) 15267754Smsmith { 15391116Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "A FADT is not loaded\n")); 15467754Smsmith 15567754Smsmith return_ACPI_STATUS (AE_NO_ACPI_TABLES); 15667754Smsmith } 15767754Smsmith 15891116Smsmith /* Sanity check the FADT for valid values */ 15967754Smsmith 16091116Smsmith Status = AcpiUtValidateFadt (); 16191116Smsmith if (ACPI_FAILURE (Status)) 16267754Smsmith { 16391116Smsmith return_ACPI_STATUS (Status); 16487031Smsmith } 16567754Smsmith 16691116Smsmith return_ACPI_STATUS (AE_OK); 16767754Smsmith} 16867754Smsmith 16967754Smsmith 17067754Smsmith/****************************************************************************** 17167754Smsmith * 17267754Smsmith * FUNCTION: AcpiHwSetMode 17367754Smsmith * 17467754Smsmith * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 17567754Smsmith * 17667754Smsmith * RETURN: Status 17767754Smsmith * 17891116Smsmith * DESCRIPTION: Transitions the system into the requested mode. 17967754Smsmith * 18067754Smsmith ******************************************************************************/ 18167754Smsmith 18267754SmsmithACPI_STATUS 18367754SmsmithAcpiHwSetMode ( 18467754Smsmith UINT32 Mode) 18567754Smsmith{ 18667754Smsmith 18799679Siwasaki ACPI_STATUS Status; 18899679Siwasaki UINT32 Retry; 18967754Smsmith 19083174Smsmith 19191116Smsmith ACPI_FUNCTION_TRACE ("HwSetMode"); 19267754Smsmith 193102550Siwasaki /* 194102550Siwasaki * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 195102550Siwasaki * system does not support mode transition. 196102550Siwasaki */ 197102550Siwasaki if (!AcpiGbl_FADT->SmiCmd) 198102550Siwasaki { 199123315Snjl ACPI_REPORT_ERROR (("No SMI_CMD in FADT, mode transition failed.\n")); 200102550Siwasaki return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 201102550Siwasaki } 202102550Siwasaki 203102550Siwasaki /* 204102550Siwasaki * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE 205102550Siwasaki * in FADT: If it is zero, enabling or disabling is not supported. 206102550Siwasaki * As old systems may have used zero for mode transition, 207102550Siwasaki * we make sure both the numbers are zero to determine these 208102550Siwasaki * transitions are not supported. 209102550Siwasaki */ 210102550Siwasaki if (!AcpiGbl_FADT->AcpiEnable && !AcpiGbl_FADT->AcpiDisable) 211102550Siwasaki { 212123315Snjl ACPI_REPORT_ERROR (("No ACPI mode transition supported in this system (enable/disable both zero)\n")); 213102550Siwasaki return_ACPI_STATUS (AE_OK); 214102550Siwasaki } 215102550Siwasaki 21699679Siwasaki switch (Mode) 21799679Siwasaki { 21899679Siwasaki case ACPI_SYS_MODE_ACPI: 21967754Smsmith 22067754Smsmith /* BIOS should have disabled ALL fixed and GP events */ 22167754Smsmith 222102550Siwasaki Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 223117521Snjl (UINT32) AcpiGbl_FADT->AcpiEnable, 8); 22482367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); 22599679Siwasaki break; 22699679Siwasaki 22799679Siwasaki case ACPI_SYS_MODE_LEGACY: 22899679Siwasaki 22967754Smsmith /* 23067754Smsmith * BIOS should clear all fixed status bits and restore fixed event 23167754Smsmith * enable bits to default 23267754Smsmith */ 233102550Siwasaki Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, 234117521Snjl (UINT32) AcpiGbl_FADT->AcpiDisable, 8); 23582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 23682367Smsmith "Attempting to enable Legacy (non-ACPI) mode\n")); 23799679Siwasaki break; 23899679Siwasaki 23999679Siwasaki default: 24099679Siwasaki return_ACPI_STATUS (AE_BAD_PARAMETER); 24167754Smsmith } 24267754Smsmith 24399679Siwasaki if (ACPI_FAILURE (Status)) 24499679Siwasaki { 245123315Snjl ACPI_REPORT_ERROR (("Could not write mode change, %s\n", AcpiFormatException (Status))); 24699679Siwasaki return_ACPI_STATUS (Status); 24799679Siwasaki } 24883174Smsmith 24999679Siwasaki /* 25099679Siwasaki * Some hardware takes a LONG time to switch modes. Give them 3 sec to 25199679Siwasaki * do so, but allow faster systems to proceed more quickly. 25299679Siwasaki */ 25399679Siwasaki Retry = 3000; 25499679Siwasaki while (Retry) 25599679Siwasaki { 256102550Siwasaki if (AcpiHwGetMode() == Mode) 257102550Siwasaki { 25899679Siwasaki ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", Mode)); 259123315Snjl return_ACPI_STATUS (AE_OK); 26099679Siwasaki } 261102550Siwasaki AcpiOsStall(1000); 26299679Siwasaki Retry--; 26367754Smsmith } 26467754Smsmith 265123315Snjl ACPI_REPORT_ERROR (("Hardware never changed modes\n")); 266123315Snjl return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); 26767754Smsmith} 26867754Smsmith 26967754Smsmith 27067754Smsmith/****************************************************************************** 27167754Smsmith * 27267754Smsmith * FUNCTION: AcpiHwGetMode 27367754Smsmith * 27467754Smsmith * PARAMETERS: none 27567754Smsmith * 27667754Smsmith * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 27767754Smsmith * 27867754Smsmith * DESCRIPTION: Return current operating state of system. Determined by 27967754Smsmith * querying the SCI_EN bit. 28067754Smsmith * 28167754Smsmith ******************************************************************************/ 28267754Smsmith 28367754SmsmithUINT32 28467754SmsmithAcpiHwGetMode (void) 28567754Smsmith{ 28699679Siwasaki ACPI_STATUS Status; 28799679Siwasaki UINT32 Value; 28867754Smsmith 28999679Siwasaki 29091116Smsmith ACPI_FUNCTION_TRACE ("HwGetMode"); 29167754Smsmith 292123315Snjl 293123315Snjl /* 294123315Snjl * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, 295123315Snjl * system does not support mode transition. 296123315Snjl */ 297123315Snjl if (!AcpiGbl_FADT->SmiCmd) 298123315Snjl { 299123315Snjl return_VALUE (ACPI_SYS_MODE_ACPI); 300123315Snjl } 301123315Snjl 30299679Siwasaki Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value, ACPI_MTX_LOCK); 30399679Siwasaki if (ACPI_FAILURE (Status)) 30499679Siwasaki { 30599679Siwasaki return_VALUE (ACPI_SYS_MODE_LEGACY); 30699679Siwasaki } 30767754Smsmith 30899679Siwasaki if (Value) 30967754Smsmith { 31091116Smsmith return_VALUE (ACPI_SYS_MODE_ACPI); 31167754Smsmith } 31267754Smsmith else 31367754Smsmith { 31491116Smsmith return_VALUE (ACPI_SYS_MODE_LEGACY); 31567754Smsmith } 31667754Smsmith} 317