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287 lines
12 KiB
C
287 lines
12 KiB
C
/** @file
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This file defines the SPI I/O Protocol.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This Protocol was introduced in UEFI PI Specification 1.6.
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**/
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#ifndef __SPI_IO_PROTOCOL_H__
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#define __SPI_IO_PROTOCOL_H__
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#include <Protocol/LegacySpiController.h>
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#include <Protocol/SpiConfiguration.h>
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typedef struct _EFI_SPI_IO_PROTOCOL EFI_SPI_IO_PROTOCOL;
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///
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/// Note: The UEFI PI 1.6 specification does not specify values for the
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/// members below. The order matches the specification.
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///
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typedef enum {
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///
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/// Data flowing in both direction between the host and
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/// SPI peripheral.ReadBytes must equal WriteBytes and both ReadBuffer and
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/// WriteBuffer must be provided.
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///
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SPI_TRANSACTION_FULL_DUPLEX,
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///
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/// Data flowing from the host to the SPI peripheral.ReadBytes must be
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/// zero.WriteBytes must be non - zero and WriteBuffer must be provided.
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///
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SPI_TRANSACTION_WRITE_ONLY,
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///
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/// Data flowing from the SPI peripheral to the host.WriteBytes must be
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/// zero.ReadBytes must be non - zero and ReadBuffer must be provided.
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///
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SPI_TRANSACTION_READ_ONLY,
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///
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/// Data first flowing from the host to the SPI peripheral and then data
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/// flows from the SPI peripheral to the host.These types of operations get
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/// used for SPI flash devices when control data (opcode, address) must be
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/// passed to the SPI peripheral to specify the data to be read.
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///
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SPI_TRANSACTION_WRITE_THEN_READ
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} EFI_SPI_TRANSACTION_TYPE;
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/**
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Initiate a SPI transaction between the host and a SPI peripheral.
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This routine must be called at or below TPL_NOTIFY.
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This routine works with the SPI bus layer to pass the SPI transaction to the
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SPI controller for execution on the SPI bus. There are four types of
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supported transactions supported by this routine:
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* Full Duplex: WriteBuffer and ReadBuffer are the same size.
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* Write Only: WriteBuffer contains data for SPI peripheral, ReadBytes = 0
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* Read Only: ReadBuffer to receive data from SPI peripheral, WriteBytes = 0
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* Write Then Read: WriteBuffer contains control data to write to SPI
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peripheral before data is placed into the ReadBuffer.
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Both WriteBytes and ReadBytes must be non-zero.
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@param[in] This Pointer to an EFI_SPI_IO_PROTOCOL structure.
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@param[in] TransactionType Type of SPI transaction.
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@param[in] DebugTransaction Set TRUE only when debugging is desired.
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Debugging may be turned on for a single SPI
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transaction. Only this transaction will display
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debugging messages. All other transactions with
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this value set to FALSE will not display any
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debugging messages.
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@param[in] ClockHz Specify the ClockHz value as zero (0) to use
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the maximum clock frequency supported by the
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SPI controller and part. Specify a non-zero
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value only when a specific SPI transaction
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requires a reduced clock rate.
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@param[in] BusWidth Width of the SPI bus in bits: 1, 2, 4
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@param[in] FrameSize Frame size in bits, range: 1 - 32
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@param[in] WriteBytes The length of the WriteBuffer in bytes.
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Specify zero for read-only operations.
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@param[in] WriteBuffer The buffer containing data to be sent from the
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host to the SPI chip. Specify NULL for read
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only operations.
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* Frame sizes 1-8 bits: UINT8 (one byte) per
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frame
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* Frame sizes 7-16 bits: UINT16 (two bytes) per
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frame
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* Frame sizes 17-32 bits: UINT32 (four bytes)
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per frame The transmit frame is in the least
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significant N bits.
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@param[in] ReadBytes The length of the ReadBuffer in bytes.
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Specify zero for write-only operations.
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@param[out] ReadBuffer The buffer to receeive data from the SPI chip
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during the transaction. Specify NULL for write
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only operations.
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* Frame sizes 1-8 bits: UINT8 (one byte) per
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frame
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* Frame sizes 7-16 bits: UINT16 (two bytes) per
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frame
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* Frame sizes 17-32 bits: UINT32 (four bytes)
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per frame The received frame is in the least
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significant N bits.
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@retval EFI_SUCCESS The SPI transaction completed successfully
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@retval EFI_BAD_BUFFER_SIZE The writeBytes value was invalid
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@retval EFI_BAD_BUFFER_SIZE The ReadBytes value was invalid
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@retval EFI_INVALID_PARAMETER TransactionType is not valid,
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or BusWidth not supported by SPI peripheral or
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SPI host controller,
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or WriteBytes non-zero and WriteBuffer is
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NULL,
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or ReadBytes non-zero and ReadBuffer is NULL,
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or ReadBuffer != WriteBuffer for full-duplex
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type,
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or WriteBuffer was NULL,
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or TPL is too high
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@retval EFI_OUT_OF_RESOURCES Insufficient memory for SPI transaction
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@retval EFI_UNSUPPORTED The FrameSize is not supported by the SPI bus
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layer or the SPI host controller
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@retval EFI_UNSUPPORTED The SPI controller was not able to support
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SPI_IO_PROTOCOL_TRANSACTION) (
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IN CONST EFI_SPI_IO_PROTOCOL *This,
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IN EFI_SPI_TRANSACTION_TYPE TransactionType,
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IN BOOLEAN DebugTransaction,
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IN UINT32 ClockHz OPTIONAL,
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IN UINT32 BusWidth,
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IN UINT32 FrameSize,
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IN UINT32 WriteBytes,
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IN UINT8 *WriteBuffer,
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IN UINT32 ReadBytes,
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OUT UINT8 *ReadBuffer
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);
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/**
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Update the SPI peripheral associated with this SPI 10 instance.
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Support socketed SPI parts by allowing the SPI peripheral driver to replace
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the SPI peripheral after the connection is made. An example use is socketed
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SPI NOR flash parts, where the size and parameters change depending upon
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device is in the socket.
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@param[in] This Pointer to an EFI_SPI_IO_PROTOCOL structure.
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@param[in] SpiPeripheral Pointer to an EFI_SPI_PERIPHERAL structure.
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@retval EFI_SUCCESS The SPI peripheral was updated successfully
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@retval EFI_INVALID_PARAMETER The SpiPeripheral value is NULL,
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or the SpiPeripheral->SpiBus is NULL,
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or the SpiP eripheral - >SpiBus pointing at
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wrong bus,
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or the SpiP eripheral - >SpiPart is NULL
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**/
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typedef EFI_STATUS
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(EFIAPI *EFI_SPI_IO_PROTOCOL_UPDATE_SPI_PERIPHERAL) (
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IN CONST EFI_SPI_IO_PROTOCOL *This,
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IN CONST EFI_SPI_PERIPHERAL *SpiPeripheral
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);
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///
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/// The EFI_SPI_BUS_ TRANSACTION data structure contains the description of the
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/// SPI transaction to perform on the host controller.
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///
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typedef struct _EFI_SPI_BUS_TRANSACTION {
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///
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/// Pointer to the SPI peripheral being manipulated.
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///
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CONST EFI_SPI_PERIPHERAL *SpiPeripheral;
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///
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/// Type of transaction specified by one of the EFI_SPI_TRANSACTION_TYPE
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/// values.
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///
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EFI_SPI_TRANSACTION_TYPE TransactionType;
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///
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/// TRUE if the transaction is being debugged. Debugging may be turned on for
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/// a single SPI transaction. Only this transaction will display debugging
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/// messages. All other transactions with this value set to FALSE will not
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/// display any debugging messages.
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///
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BOOLEAN DebugTransaction;
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///
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/// SPI bus width in bits: 1, 2, 4
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///
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UINT32 BusWidth;
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///
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/// Frame size in bits, range: 1 - 32
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///
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UINT32 FrameSize;
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///
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/// Length of the write buffer in bytes
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///
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UINT32 WriteBytes;
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///
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/// Buffer containing data to send to the SPI peripheral
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/// Frame sizes 1 - 8 bits: UINT8 (one byte) per frame
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/// Frame sizes 7 - 16 bits : UINT16 (two bytes) per frame
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///
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UINT8 *WriteBuffer;
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///
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/// Length of the read buffer in bytes
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///
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UINT32 ReadBytes;
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///
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/// Buffer to receive the data from the SPI peripheral
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/// * Frame sizes 1 - 8 bits: UINT8 (one byte) per frame
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/// * Frame sizes 7 - 16 bits : UINT16 (two bytes) per frame
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/// * Frame sizes 17 - 32 bits : UINT32 (four bytes) per frame
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///
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UINT8 *ReadBuffer;
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} EFI_SPI_BUS_TRANSACTION;
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///
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/// Support managed SPI data transactions between the SPI controller and a SPI
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/// chip.
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///
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struct _EFI_SPI_IO_PROTOCOL {
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///
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/// Address of an EFI_SPI_PERIPHERAL data structure associated with this
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/// protocol instance.
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///
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CONST EFI_SPI_PERIPHERAL *SpiPeripheral;
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///
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/// Address of the original EFI_SPI_PERIPHERAL data structure associated with
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/// this protocol instance.
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///
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CONST EFI_SPI_PERIPHERAL *OriginalSpiPeripheral;
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///
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/// Mask of frame sizes which the SPI 10 layer supports. Frame size of N-bits
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/// is supported when bit N-1 is set. The host controller must support a
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/// frame size of 8-bits. Frame sizes of 16, 24 and 32-bits are converted to
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/// 8-bit frame sizes by the SPI bus layer if the frame size is not supported
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/// by the SPI host controller.
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///
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UINT32 FrameSizeSupportMask;
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///
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/// Maximum transfer size in bytes: 1 - Oxffffffff
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///
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UINT32 MaximumTransferBytes;
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///
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/// Transaction attributes: One or more from:
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/// * SPI_10_SUPPORTS_2_B1T_DATA_BUS_W1DTH
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/// - The SPI host and peripheral supports a 2-bit data bus
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/// * SPI_IO_SUPPORTS_4_BIT_DATA_BUS_W1DTH
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/// - The SPI host and peripheral supports a 4-bit data bus
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/// * SPI_IO_TRANSFER_SIZE_INCLUDES_OPCODE
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/// - Transfer size includes the opcode byte
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/// * SPI_IO_TRANSFER_SIZE_INCLUDES_ADDRESS
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/// - Transfer size includes the 3 address bytes
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///
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UINT32 Attributes;
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///
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/// Pointer to legacy SPI controller protocol
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///
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CONST EFI_LEGACY_SPI_CONTROLLER_PROTOCOL *LegacySpiProtocol;
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///
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/// Initiate a SPI transaction between the host and a SPI peripheral.
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///
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EFI_SPI_IO_PROTOCOL_TRANSACTION Transaction;
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///
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/// Update the SPI peripheral associated with this SPI 10 instance.
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///
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EFI_SPI_IO_PROTOCOL_UPDATE_SPI_PERIPHERAL UpdateSpiPeripheral;
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};
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#endif // __SPI_IO_PROTOCOL_H__
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