mirror of
https://github.com/eclipse-threadx/levelx.git
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124 lines
5.4 KiB
C
124 lines
5.4 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_close 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 closes a NAND flash instance. */
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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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/* */
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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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/* tx_mutex_delete Delete thread-safe mutex */
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/* */
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/* CALLED BY */
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/* */
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/* Application Code */
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/* */
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/**************************************************************************/
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UINT _lx_nand_flash_close(LX_NAND_FLASH *nand_flash)
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{
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LX_INTERRUPT_SAVE_AREA
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/* Lockout interrupts for NAND flash close. */
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LX_DISABLE
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/* See if the media is the only one on the media opened list. */
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if ((_lx_nand_flash_opened_ptr == nand_flash) &&
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(_lx_nand_flash_opened_ptr == nand_flash -> lx_nand_flash_open_next) &&
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(_lx_nand_flash_opened_ptr == nand_flash -> lx_nand_flash_open_previous))
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{
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/* Only opened NAND flash, just set the opened list to NULL. */
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_lx_nand_flash_opened_ptr = LX_NULL;
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}
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else
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{
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/* Otherwise, not the only opened NAND flash, link-up the neighbors. */
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(nand_flash -> lx_nand_flash_open_next) -> lx_nand_flash_open_previous =
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nand_flash -> lx_nand_flash_open_previous;
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(nand_flash -> lx_nand_flash_open_previous) -> lx_nand_flash_open_next =
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nand_flash -> lx_nand_flash_open_next;
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/* See if we have to update the opened list head pointer. */
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if (_lx_nand_flash_opened_ptr == nand_flash)
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{
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/* Yes, move the head pointer to the next opened NAND flash. */
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_lx_nand_flash_opened_ptr = nand_flash -> lx_nand_flash_open_next;
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}
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}
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/* Decrement the opened NAND flash counter. */
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_lx_nand_flash_opened_count--;
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/* Finally, indicate that this NAND flash is closed. */
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nand_flash -> lx_nand_flash_state = LX_NAND_FLASH_CLOSED;
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/* Restore interrupt posture. */
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LX_RESTORE
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#ifdef LX_THREAD_SAFE_ENABLE
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/* Delete the thread safe mutex. */
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tx_mutex_delete(&nand_flash -> lx_nand_flash_mutex);
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#endif
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/* Return success. */
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return(LX_SUCCESS);
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}
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