/****************************************************************************** * * Module Name: exserial - FieldUnit support for serial address spaces * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include "acpi.h" #include "accommon.h" #include "acdispat.h" #include "acinterp.h" #include "amlcode.h" #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME ("exserial") /******************************************************************************* * * FUNCTION: AcpiExReadGpio * * PARAMETERS: ObjDesc - The named field to read * Buffer - Where the return data is returned * * RETURN: Status * * DESCRIPTION: Read from a named field that references a Generic Serial Bus * field * ******************************************************************************/ ACPI_STATUS AcpiExReadGpio ( ACPI_OPERAND_OBJECT *ObjDesc, void *Buffer) { ACPI_STATUS Status; ACPI_FUNCTION_TRACE_PTR (ExReadGpio, ObjDesc); /* * For GPIO (GeneralPurposeIo), the Address will be the bit offset * from the previous Connection() operator, making it effectively a * pin number index. The BitLength is the length of the field, which * is thus the number of pins. */ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "GPIO FieldRead [FROM]: Pin %u Bits %u\n", ObjDesc->Field.PinNumberIndex, ObjDesc->Field.BitLength)); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Perform the read */ Status = AcpiExAccessRegion ( ObjDesc, 0, (UINT64 *) Buffer, ACPI_READ); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExWriteGpio * * PARAMETERS: SourceDesc - Contains data to write. Expect to be * an Integer object. * ObjDesc - The named field * ResultDesc - Where the return value is returned, if any * * RETURN: Status * * DESCRIPTION: Write to a named field that references a General Purpose I/O * field. * ******************************************************************************/ ACPI_STATUS AcpiExWriteGpio ( ACPI_OPERAND_OBJECT *SourceDesc, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **ReturnBuffer) { ACPI_STATUS Status; void *Buffer; ACPI_FUNCTION_TRACE_PTR (ExWriteGpio, ObjDesc); /* * For GPIO (GeneralPurposeIo), we will bypass the entire field * mechanism and handoff the bit address and bit width directly to * the handler. The Address will be the bit offset * from the previous Connection() operator, making it effectively a * pin number index. The BitLength is the length of the field, which * is thus the number of pins. */ if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER) { return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "GPIO FieldWrite [FROM]: (%s:%X), Value %.8X [TO]: Pin %u Bits %u\n", AcpiUtGetTypeName (SourceDesc->Common.Type), SourceDesc->Common.Type, (UINT32) SourceDesc->Integer.Value, ObjDesc->Field.PinNumberIndex, ObjDesc->Field.BitLength)); Buffer = &SourceDesc->Integer.Value; /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Perform the write */ Status = AcpiExAccessRegion ( ObjDesc, 0, (UINT64 *) Buffer, ACPI_WRITE); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExReadSerialBus * * PARAMETERS: ObjDesc - The named field to read * ReturnBuffer - Where the return value is returned, if any * * RETURN: Status * * DESCRIPTION: Read from a named field that references a serial bus * (SMBus, IPMI, or GSBus). * ******************************************************************************/ ACPI_STATUS AcpiExReadSerialBus ( ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **ReturnBuffer) { ACPI_STATUS Status; UINT32 BufferLength; ACPI_OPERAND_OBJECT *BufferDesc; UINT32 Function; UINT16 AccessorType; ACPI_FUNCTION_TRACE_PTR (ExReadSerialBus, ObjDesc); /* * This is an SMBus, GSBus or IPMI read. We must create a buffer to * hold the data and then directly access the region handler. * * Note: SMBus and GSBus protocol value is passed in upper 16-bits * of Function * * Common buffer format: * Status; (Byte 0 of the data buffer) * Length; (Byte 1 of the data buffer) * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) */ switch (ObjDesc->Field.RegionObj->Region.SpaceId) { case ACPI_ADR_SPACE_SMBUS: BufferLength = ACPI_SMBUS_BUFFER_SIZE; Function = ACPI_READ | (ObjDesc->Field.Attribute << 16); break; case ACPI_ADR_SPACE_IPMI: BufferLength = ACPI_IPMI_BUFFER_SIZE; Function = ACPI_READ; break; case ACPI_ADR_SPACE_GSBUS: AccessorType = ObjDesc->Field.Attribute; if (AccessorType == AML_FIELD_ATTRIB_RAW_PROCESS_BYTES) { ACPI_ERROR ((AE_INFO, "Invalid direct read using bidirectional write-then-read protocol")); return_ACPI_STATUS (AE_AML_PROTOCOL); } Status = AcpiExGetProtocolBufferLength (AccessorType, &BufferLength); if (ACPI_FAILURE (Status)) { ACPI_ERROR ((AE_INFO, "Invalid protocol ID for GSBus: 0x%4.4X", AccessorType)); return_ACPI_STATUS (Status); } /* Add header length to get the full size of the buffer */ BufferLength += ACPI_SERIAL_HEADER_SIZE; Function = ACPI_READ | (AccessorType << 16); break; case ACPI_ADR_SPACE_PLATFORM_RT: BufferLength = ACPI_PRM_INPUT_BUFFER_SIZE; Function = ACPI_READ; break; default: return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID); } /* Create the local transfer buffer that is returned to the caller */ BufferDesc = AcpiUtCreateBufferObject (BufferLength); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* Call the region handler for the write-then-read */ Status = AcpiExAccessRegion (ObjDesc, 0, ACPI_CAST_PTR (UINT64, BufferDesc->Buffer.Pointer), Function); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); *ReturnBuffer = BufferDesc; return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiExWriteSerialBus * * PARAMETERS: SourceDesc - Contains data to write * ObjDesc - The named field * ReturnBuffer - Where the return value is returned, if any * * RETURN: Status * * DESCRIPTION: Write to a named field that references a serial bus * (SMBus, IPMI, GSBus). * ******************************************************************************/ ACPI_STATUS AcpiExWriteSerialBus ( ACPI_OPERAND_OBJECT *SourceDesc, ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **ReturnBuffer) { ACPI_STATUS Status; UINT32 BufferLength; UINT32 DataLength; void *Buffer; ACPI_OPERAND_OBJECT *BufferDesc; UINT32 Function; UINT16 AccessorType; ACPI_FUNCTION_TRACE_PTR (ExWriteSerialBus, ObjDesc); /* * This is an SMBus, GSBus or IPMI write. We will bypass the entire * field mechanism and handoff the buffer directly to the handler. * For these address spaces, the buffer is bidirectional; on a * write, return data is returned in the same buffer. * * Source must be a buffer of sufficient size, these are fixed size: * ACPI_SMBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE. * * Note: SMBus and GSBus protocol type is passed in upper 16-bits * of Function * * Common buffer format: * Status; (Byte 0 of the data buffer) * Length; (Byte 1 of the data buffer) * Data[x-1]: (Bytes 2-x of the arbitrary length data buffer) */ if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) { ACPI_ERROR ((AE_INFO, "SMBus/IPMI/GenericSerialBus write requires " "Buffer, found type %s", AcpiUtGetObjectTypeName (SourceDesc))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } switch (ObjDesc->Field.RegionObj->Region.SpaceId) { case ACPI_ADR_SPACE_SMBUS: BufferLength = ACPI_SMBUS_BUFFER_SIZE; Function = ACPI_WRITE | (ObjDesc->Field.Attribute << 16); break; case ACPI_ADR_SPACE_IPMI: BufferLength = ACPI_IPMI_BUFFER_SIZE; Function = ACPI_WRITE; break; case ACPI_ADR_SPACE_GSBUS: AccessorType = ObjDesc->Field.Attribute; Status = AcpiExGetProtocolBufferLength (AccessorType, &BufferLength); if (ACPI_FAILURE (Status)) { ACPI_ERROR ((AE_INFO, "Invalid protocol ID for GSBus: 0x%4.4X", AccessorType)); return_ACPI_STATUS (Status); } /* Add header length to get the full size of the buffer */ BufferLength += ACPI_SERIAL_HEADER_SIZE; Function = ACPI_WRITE | (AccessorType << 16); break; case ACPI_ADR_SPACE_PLATFORM_RT: BufferLength = ACPI_PRM_INPUT_BUFFER_SIZE; Function = ACPI_WRITE; break; default: return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID); } /* Create the transfer/bidirectional/return buffer */ BufferDesc = AcpiUtCreateBufferObject (BufferLength); if (!BufferDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Copy the input buffer data to the transfer buffer */ Buffer = BufferDesc->Buffer.Pointer; DataLength = (BufferLength < SourceDesc->Buffer.Length ? BufferLength : SourceDesc->Buffer.Length); memcpy (Buffer, SourceDesc->Buffer.Pointer, DataLength); /* Lock entire transaction if requested */ AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags); /* * Perform the write (returns status and perhaps data in the * same buffer) */ Status = AcpiExAccessRegion ( ObjDesc, 0, (UINT64 *) Buffer, Function); AcpiExReleaseGlobalLock (ObjDesc->CommonField.FieldFlags); *ReturnBuffer = BufferDesc; return_ACPI_STATUS (Status); }