mirror of
https://github.com/eclipse-threadx/levelx.git
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125 lines
5.5 KiB
C
125 lines
5.5 KiB
C
/***************************************************************************
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* Copyright (c) 2024 Microsoft Corporation
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* Copyright (c) 2026-present Eclipse ThreadX contributors
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*
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* This program and the accompanying materials are made available under the
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* terms of the MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** LevelX Component */
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/** */
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/** NAND Flash */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define LX_SOURCE_CODE
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/* Disable ThreadX error checking. */
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#ifndef LX_DISABLE_ERROR_CHECKING
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#define LX_DISABLE_ERROR_CHECKING
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#endif
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/* Include necessary system files. */
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#include "lx_api.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _lx_nand_flash_page_ecc_check PORTABLE C */
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/* 6.1.7 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function checks the NAND page and ECC for errors and */
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/* attempts to correct 1 bit errors. */
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/* */
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/* INPUT */
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/* */
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/* nand_flash NAND flash instance */
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/* page_buffer Page buffer */
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/* ecc_buffer Returned ECC buffer */
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/* */
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/* OUTPUT */
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/* */
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/* return status */
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/* */
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/* CALLS */
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/* */
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/* _lx_nand_flash_256byte_ecc_check Check 256 bytes and ECC */
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/* */
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/* CALLED BY */
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/* */
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/* NAND flash driver */
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/* */
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/**************************************************************************/
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UINT _lx_nand_flash_page_ecc_check(LX_NAND_FLASH *nand_flash, UCHAR *page_buffer, UCHAR *ecc_buffer)
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{
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UINT bytes_checked;
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UINT status;
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UINT return_status = LX_SUCCESS;
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/* Loop to check the entire NAND flash page. */
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bytes_checked = 0;
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while (bytes_checked < nand_flash -> lx_nand_flash_bytes_per_page)
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{
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/* Check this 256 byte piece of the NAND page. */
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status = _lx_nand_flash_256byte_ecc_check(page_buffer, ecc_buffer);
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/* Determine if there was an error. */
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if (status != LX_SUCCESS)
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{
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/* Determine if a non-correctable error is present. */
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if (status == LX_NAND_ERROR_NOT_CORRECTED)
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{
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/* Always return a non-correctable error, if present. */
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return_status = LX_NAND_ERROR_NOT_CORRECTED;
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break;
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}
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/* A single-bit error was corrected, return this status
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if there is no LX_ERROR status already detected. */
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else if (return_status == LX_SUCCESS)
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{
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/* Return a notice that the single bit error was corrected. */
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return_status = LX_NAND_ERROR_CORRECTED;
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}
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}
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/* Move to the next 256 byte portion of the page. */
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bytes_checked = bytes_checked + 256;
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/* Move the page buffer forward. */
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page_buffer = page_buffer + 256;
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/* Move the ECC buffer forward, note there are 3 bytes of ECC per page. */
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ecc_buffer = ecc_buffer + 3;
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}
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/* Return status. */
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return(return_status);
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}
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