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+/** @file
+ This file defines the SPI NOR Flash Protocol.
+
+ Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ @par Revision Reference:
+ This Protocol was introduced in UEFI PI Specification 1.6.
+
+**/
+
+#ifndef __SPI_NOR_FLASH_PROTOCOL_H__
+#define __SPI_NOR_FLASH_PROTOCOL_H__
+
+#include <Protocol/SpiConfiguration.h>
+
+///
+/// Global ID for the SPI NOR Flash Protocol
+///
+#define EFI_SPI_NOR_FLASH_PROTOCOL_GUID \
+ { 0xb57ec3fe, 0xf833, 0x4ba6, \
+ { 0x85, 0x78, 0x2a, 0x7d, 0x6a, 0x87, 0x44, 0x4b }}
+
+typedef struct _EFI_SPI_NOR_FLASH_PROTOCOL EFI_SPI_NOR_FLASH_PROTOCOL;
+
+/**
+ Read the 3 byte manufacture and device ID from the SPI flash.
+
+ This routine must be called at or below TPL_NOTIFY.
+ This routine reads the 3 byte manufacture and device ID from the flash part
+ filling the buffer provided.
+
+ @param[in] This Pointer to an EFI_SPI_NOR_FLASH_PROTOCOL data structure.
+ @param[out] Buffer Pointer to a 3 byte buffer to receive the manufacture and
+ device ID.
+
+
+
+ @retval EFI_SUCCESS The manufacture and device ID was read
+ successfully.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL
+ @retval EFI_DEVICE_ERROR Invalid data received from SPI flash part.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SPI_NOR_FLASH_PROTOCOL_GET_FLASH_ID) (
+ IN CONST EFI_SPI_NOR_FLASH_PROTOCOL *This,
+ OUT UINT8 *Buffer
+ );
+
+/**
+ Read data from the SPI flash.
+
+ This routine must be called at or below TPL_NOTIFY.
+ This routine reads data from the SPI part in the buffer provided.
+
+ @param[in] This Pointer to an EFI_SPI_NOR_FLASH_PROTOCOL data
+ structure.
+ @param[in] FlashAddress Address in the flash to start reading
+ @param[in] LengthInBytes Read length in bytes
+ @param[out] Buffer Address of a buffer to receive the data
+
+ @retval EFI_SUCCESS The data was read successfully.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL, or
+ FlashAddress >= This->FlashSize, or
+ LengthInBytes > This->FlashSize - FlashAddress
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SPI_NOR_FLASH_PROTOCOL_READ_DATA) (
+ IN CONST EFI_SPI_NOR_FLASH_PROTOCOL *This,
+ IN UINT32 FlashAddress,
+ IN UINT32 LengthInBytes,
+ OUT UINT8 *Buffer
+ );
+
+/**
+ Read the flash status register.
+
+ This routine must be called at or below TPL_NOTIFY.
+ This routine reads the flash part status register.
+
+ @param[in] This Pointer to an EFI_SPI_NOR_FLASH_PROTOCOL data
+ structure.
+ @param[in] LengthInBytes Number of status bytes to read.
+ @param[out] FlashStatus Pointer to a buffer to receive the flash status.
+
+ @retval EFI_SUCCESS The status register was read successfully.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SPI_NOR_FLASH_PROTOCOL_READ_STATUS) (
+ IN CONST EFI_SPI_NOR_FLASH_PROTOCOL *This,
+ IN UINT32 LengthInBytes,
+ OUT UINT8 *FlashStatus
+ );
+
+/**
+ Write the flash status register.
+
+ This routine must be called at or below TPL_N OTIFY.
+ This routine writes the flash part status register.
+
+ @param[in] This Pointer to an EFI_SPI_NOR_FLASH_PROTOCOL data
+ structure.
+ @param[in] LengthInBytes Number of status bytes to write.
+ @param[in] FlashStatus Pointer to a buffer containing the new status.
+
+ @retval EFI_SUCCESS The status write was successful.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate the write buffer.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SPI_NOR_FLASH_PROTOCOL_WRITE_STATUS) (
+ IN CONST EFI_SPI_NOR_FLASH_PROTOCOL *This,
+ IN UINT32 LengthInBytes,
+ IN UINT8 *FlashStatus
+ );
+
+/**
+ Write data to the SPI flash.
+
+ This routine must be called at or below TPL_NOTIFY.
+ This routine breaks up the write operation as necessary to write the data to
+ the SPI part.
+
+ @param[in] This Pointer to an EFI_SPI_NOR_FLASH_PROTOCOL data
+ structure.
+ @param[in] FlashAddress Address in the flash to start writing
+ @param[in] LengthInBytes Write length in bytes
+ @param[in] Buffer Address of a buffer containing the data
+
+ @retval EFI_SUCCESS The data was written successfully.
+ @retval EFI_INVALID_PARAMETER Buffer is NULL, or
+ FlashAddress >= This->FlashSize, or
+ LengthInBytes > This->FlashSize - FlashAddress
+ @retval EFI_OUT_OF_RESOURCES Insufficient memory to copy buffer.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SPI_NOR_FLASH_PROTOCOL_WRITE_DATA) (
+ IN CONST EFI_SPI_NOR_FLASH_PROTOCOL *This,
+ IN UINT32 FlashAddress,
+ IN UINT32 LengthInBytes,
+ IN UINT8 *Buffer
+ );
+
+/**
+ Efficiently erases one or more 4KiB regions in the SPI flash.
+
+ This routine must be called at or below TPL_NOTIFY.
+ This routine uses a combination of 4 KiB and larger blocks to erase the
+ specified area.
+
+ @param[in] This Pointer to an EFI_SPI_NOR_FLASH_PROTOCOL data
+ structure.
+ @param[in] FlashAddress Address within a 4 KiB block to start erasing
+ @param[in] BlockCount Number of 4 KiB blocks to erase
+
+ @retval EFI_SUCCESS The erase was completed successfully.
+ @retval EFI_INVALID_PARAMETER FlashAddress >= This->FlashSize, or
+ BlockCount * 4 KiB
+ > This->FlashSize - FlashAddress
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_SPI_NOR_FLASH_PROTOCOL_ERASE) (
+ IN CONST EFI_SPI_NOR_FLASH_PROTOCOL *This,
+ IN UINT32 FlashAddress,
+ IN UINT32 BlockCount
+ );
+
+///
+/// The EFI_SPI_NOR_FLASH_PROTOCOL exists in the SPI peripheral layer.
+/// This protocol manipulates the SPI NOR flash parts using a common set of
+/// commands. The board layer provides the interconnection and configuration
+/// details for the SPI NOR flash part. The SPI NOR flash driver uses this
+/// configuration data to expose a generic interface which provides the
+/// following APls:
+/// * Read manufacture and device ID
+/// * Read data
+/// * Read data using low frequency
+/// * Read status
+/// * Write data
+/// * Erase 4 KiB blocks
+/// * Erase 32 or 64 KiB blocks
+/// * Write status
+/// The EFI_SPI_NOR_FLASH_PROTOCOL also exposes some APls to set the security
+/// features on the legacy SPI flash controller.
+///
+struct _EFI_SPI_NOR_FLASH_PROTOCOL {
+ ///
+ /// Pointer to an EFI_SPI_PERIPHERAL data structure
+ ///
+ CONST EFI_SPI_PERIPHERAL *SpiPeripheral;
+
+ ///
+ /// Flash size in bytes
+ ///
+ UINT32 FlashSize;
+
+ ///
+ /// Manufacture and Device ID
+ ///
+ UINT8 Deviceid[3];
+
+ ///
+ /// Erase block size in bytes
+ ///
+ UINT32 EraseBlockBytes;
+
+ ///
+ /// Read the 3 byte manufacture and device ID from the SPI flash.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_GET_FLASH_ID GetFlashid;
+
+ ///
+ /// Read data from the SPI flash.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_READ_DATA ReadData;
+
+ ///
+ /// Low frequency read data from the SPI flash.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_READ_DATA LfReadData;
+
+ ///
+ /// Read the flash status register.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_READ_STATUS ReadStatus;
+
+ ///
+ /// Write the flash status register.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_WRITE_STATUS WriteStatus;
+
+ ///
+ /// Write data to the SPI flash.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_WRITE_DATA WriteData;
+
+ ///
+ /// Efficiently erases one or more 4KiB regions in the SPI flash.
+ ///
+ EFI_SPI_NOR_FLASH_PROTOCOL_ERASE Erase;
+};
+
+extern EFI_GUID gEfiSpiNorFlashProtocolGuid;
+
+#endif // __SPI_NOR_FLASH_PROTOCOL_H__