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2020-05-11 08:49:43 -06:00
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common/src/lx_nand_flash_driver_block_erase.c
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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** LevelX Component */
/** */
/** NAND Flash */
/** */
/**************************************************************************/
/**************************************************************************/
#define LX_SOURCE_CODE
/* Disable ThreadX error checking. */
#ifndef TX_DISABLE_ERROR_CHECKING
#define TX_DISABLE_ERROR_CHECKING
#endif
/* Include necessary system files. */
#include "lx_api.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _lx_nand_flash_driver_block_erase PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function calls the driver to erase a block. */
/* */
/* INPUT */
/* */
/* nand_flash NAND flash instance */
/* block Block number */
/* erase_count Erase count for this block */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (lx_nand_flash_driver_block_erase) Driver erase block */
/* */
/* CALLED BY */
/* */
/* Internal LevelX */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _lx_nand_flash_driver_block_erase(LX_NAND_FLASH *nand_flash, ULONG block, ULONG erase_count)
{
ULONG cache_index;
ULONG i;
UINT status;
/* Determine if the block status cache is enabled. */
if (nand_flash -> lx_nand_flash_block_status_cache != LX_NULL)
{
/* Save the block status value in the cache. */
nand_flash -> lx_nand_flash_block_status_cache[block] = 0xFF;
}
/* Determine if the page extra byte cache is enabled. */
if (nand_flash -> lx_nand_flash_page_extra_bytes_cache != LX_NULL)
{
/* Calculate the cache index. */
cache_index = (block * nand_flash -> lx_nand_flash_pages_per_block);
/* Loop to clear the entries in the page extra bytes cache. */
for (i = 0; i < nand_flash -> lx_nand_flash_pages_per_block; i++)
{
/* Clear each cache entry. */
nand_flash -> lx_nand_flash_page_extra_bytes_cache[cache_index+i].lx_nand_page_extra_info_logical_sector = (ULONG) 0xFFFFFFFF;
}
}
/* Determine if the page 0 cache is enabled. */
if (nand_flash -> lx_nand_flash_page_0_cache != LX_NULL)
{
/* Yes, the page 0 cache is enabled. */
/* Build index to page 0 cache. */
cache_index = block * (nand_flash -> lx_nand_flash_pages_per_block + 1);
/* Clear the associated page 0 cache. */
for (i = 0; i < (nand_flash -> lx_nand_flash_pages_per_block + 1); i++)
{
/* Clear each cache entry. */
nand_flash -> lx_nand_flash_page_0_cache[cache_index+i] = (ULONG) 0xFFFFFFFF;
}
}
/* Increment the block erases count. */
nand_flash -> lx_nand_flash_diagnostic_block_erases++;
/* Call driver erase block function. */
status = (nand_flash -> lx_nand_flash_driver_block_erase)(block, erase_count);
/* Return status. */
return(status);
}