137 lines
5.4 KiB
C
137 lines
5.4 KiB
C
/****************************************************************************
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* include/nuttx/mtd/nand_ecc.h
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* This logic was based largely on Atmel sample code with modifications for
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* better integration with NuttX. The Atmel sample code has a BSD
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* compatibile license that requires this copyright notice:
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*
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* Copyright (c) 2012, Atmel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the names NuttX nor Atmel nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_MTD_ECC_H
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#define __INCLUDE_NUTTX_MTD_ECC_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/mtd/nand_config.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: nandecc_readpage
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*
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* Description:
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* Reads the data and/or spare areas of a page of a NAND FLASH chip and
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* verifies that the data is valid using the ECC information contained in
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* the spare area. If a buffer pointer is NULL, then the corresponding area
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* is not saved.
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*
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* Input parameters:
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* nand - Upper-half, NAND FLASH interface
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* block - Number of the block where the page to read resides.
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* page - Number of the page to read inside the given block.
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* data - Buffer where the data area will be stored.
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* spare - Buffer where the spare area will be stored.
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*
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* Returned value.
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* OK is returned in success; a negated errno value is returned on failure.
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*
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****************************************************************************/
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int nandecc_readpage(FAR struct nand_dev_s *nand, off_t block,
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unsigned int page, FAR void *data, FAR void *spare);
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/****************************************************************************
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* Name: nandecc_writepage
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*
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* Description:
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* Writes the data and/or spare area of a NAND FLASH page after
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* calculating an ECC for the data area and storing it in the spare. If no
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* data buffer is provided, the ECC is read from the existing page spare.
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* If no spare buffer is provided, the spare area is still written with the
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* ECC information calculated on the data buffer.
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*
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* Input parameters:
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* nand - Upper-half, NAND FLASH interface
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* block - Number of the block where the page to write resides.
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* page - Number of the page to write inside the given block.
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* data - Buffer containing the data to be writting
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* spare - Buffer containing the spare data to be written.
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*
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* Returned value.
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* OK is returned in success; a negated errno value is returned on failure.
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*
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****************************************************************************/
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int nandecc_writepage(FAR struct nand_dev_s *nand, off_t block,
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unsigned int page, FAR const void *data,
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FAR void *spare);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __INCLUDE_NUTTX_MTD_ECC_H */
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