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/*************************************************************************** |
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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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/** NOR 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_nor_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 NOR flash instance. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* nor_flash NOR 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_nor_flash_close(LX_NOR_FLASH *nor_flash) |
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{ |
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LX_INTERRUPT_SAVE_AREA |
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/* Lockout interrupts for NOR 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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✓✗ |
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if ((_lx_nor_flash_opened_ptr == nor_flash) && |
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✓✗ |
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(_lx_nor_flash_opened_ptr == nor_flash -> lx_nor_flash_open_next) && |
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✓✗ |
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(_lx_nor_flash_opened_ptr == nor_flash -> lx_nor_flash_open_previous)) |
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{ |
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/* Only opened NOR flash, just set the opened list to NULL. */ |
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_lx_nor_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 NOR flash, link-up the neighbors. */ |
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(nor_flash -> lx_nor_flash_open_next) -> lx_nor_flash_open_previous = |
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nor_flash -> lx_nor_flash_open_previous; |
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(nor_flash -> lx_nor_flash_open_previous) -> lx_nor_flash_open_next = |
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nor_flash -> lx_nor_flash_open_next; |
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/* See if we have to update the opened list head pointer. */ |
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if (_lx_nor_flash_opened_ptr == nor_flash) |
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{ |
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/* Yes, move the head pointer to the next opened NOR flash. */ |
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_lx_nor_flash_opened_ptr = nor_flash -> lx_nor_flash_open_next; |
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} |
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} |
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/* Decrement the opened NOR flash counter. */ |
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_lx_nor_flash_opened_count--; |
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/* Finally, indicate that this NOR flash is closed. */ |
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nor_flash -> lx_nor_flash_state = LX_NOR_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(&nor_flash -> lx_nor_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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