diff options
Diffstat (limited to 'sys/contrib/dev/acpica/hwacpi.c')
| -rw-r--r-- | sys/contrib/dev/acpica/hwacpi.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/hwacpi.c b/sys/contrib/dev/acpica/hwacpi.c new file mode 100644 index 0000000..3c9bce9 --- /dev/null +++ b/sys/contrib/dev/acpica/hwacpi.c @@ -0,0 +1,277 @@ + +/****************************************************************************** + * + * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface + * $Revision: 1.78 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. + * All rights reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + *****************************************************************************/ + +#define __HWACPI_C__ + +#include <contrib/dev/acpica/acpi.h> + + +#define _COMPONENT ACPI_HARDWARE + ACPI_MODULE_NAME ("hwacpi") + + +/****************************************************************************** + * + * FUNCTION: AcpiHwSetMode + * + * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY + * + * RETURN: Status + * + * DESCRIPTION: Transitions the system into the requested mode. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiHwSetMode ( + UINT32 Mode) +{ + + ACPI_STATUS Status; + UINT32 Retry; + + + ACPI_FUNCTION_TRACE (HwSetMode); + + /* + * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, + * system does not support mode transition. + */ + if (!AcpiGbl_FADT.SmiCommand) + { + ACPI_ERROR ((AE_INFO, "No SMI_CMD in FADT, mode transition failed")); + return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); + } + + /* + * ACPI 2.0 clarified the meaning of ACPI_ENABLE and ACPI_DISABLE + * in FADT: If it is zero, enabling or disabling is not supported. + * As old systems may have used zero for mode transition, + * we make sure both the numbers are zero to determine these + * transitions are not supported. + */ + if (!AcpiGbl_FADT.AcpiEnable && !AcpiGbl_FADT.AcpiDisable) + { + ACPI_ERROR ((AE_INFO, + "No ACPI mode transition supported in this system (enable/disable both zero)")); + return_ACPI_STATUS (AE_OK); + } + + switch (Mode) + { + case ACPI_SYS_MODE_ACPI: + + /* BIOS should have disabled ALL fixed and GP events */ + + Status = AcpiOsWritePort (AcpiGbl_FADT.SmiCommand, + (UINT32) AcpiGbl_FADT.AcpiEnable, 8); + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); + break; + + case ACPI_SYS_MODE_LEGACY: + + /* + * BIOS should clear all fixed status bits and restore fixed event + * enable bits to default + */ + Status = AcpiOsWritePort (AcpiGbl_FADT.SmiCommand, + (UINT32) AcpiGbl_FADT.AcpiDisable, 8); + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "Attempting to enable Legacy (non-ACPI) mode\n")); + break; + + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + if (ACPI_FAILURE (Status)) + { + ACPI_EXCEPTION ((AE_INFO, Status, + "Could not write ACPI mode change")); + return_ACPI_STATUS (Status); + } + + /* + * Some hardware takes a LONG time to switch modes. Give them 3 sec to + * do so, but allow faster systems to proceed more quickly. + */ + Retry = 3000; + while (Retry) + { + if (AcpiHwGetMode() == Mode) + { + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", + Mode)); + return_ACPI_STATUS (AE_OK); + } + AcpiOsStall(1000); + Retry--; + } + + ACPI_ERROR ((AE_INFO, "Hardware did not change modes")); + return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiHwGetMode + * + * PARAMETERS: none + * + * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY + * + * DESCRIPTION: Return current operating state of system. Determined by + * querying the SCI_EN bit. + * + ******************************************************************************/ + +UINT32 +AcpiHwGetMode ( + void) +{ + ACPI_STATUS Status; + UINT32 Value; + + + ACPI_FUNCTION_TRACE (HwGetMode); + + + /* + * ACPI 2.0 clarified that if SMI_CMD in FADT is zero, + * system does not support mode transition. + */ + if (!AcpiGbl_FADT.SmiCommand) + { + return_UINT32 (ACPI_SYS_MODE_ACPI); + } + + Status = AcpiGetRegister (ACPI_BITREG_SCI_ENABLE, &Value); + if (ACPI_FAILURE (Status)) + { + return_UINT32 (ACPI_SYS_MODE_LEGACY); + } + + if (Value) + { + return_UINT32 (ACPI_SYS_MODE_ACPI); + } + else + { + return_UINT32 (ACPI_SYS_MODE_LEGACY); + } +} |
