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