74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com>
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*
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* This file is the header for the NAND BCH ECC implementation.
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*/
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#ifndef __MTD_NAND_ECC_SW_BCH_H__
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#define __MTD_NAND_ECC_SW_BCH_H__
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#include <linux/mtd/nand.h>
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#include <linux/bch.h>
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/**
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* struct nand_ecc_sw_bch_conf - private software BCH ECC engine structure
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* @req_ctx: Save request context and tweak the original request to fit the
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* engine needs
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* @code_size: Number of bytes needed to store a code (one code per step)
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* @nsteps: Number of steps
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* @calc_buf: Buffer to use when calculating ECC bytes
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* @code_buf: Buffer to use when reading (raw) ECC bytes from the chip
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* @bch: BCH control structure
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* @errloc: error location array
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* @eccmask: XOR ecc mask, allows erased pages to be decoded as valid
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*/
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struct nand_ecc_sw_bch_conf {
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struct nand_ecc_req_tweak_ctx req_ctx;
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unsigned int code_size;
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unsigned int nsteps;
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u8 *calc_buf;
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u8 *code_buf;
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struct bch_control *bch;
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unsigned int *errloc;
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unsigned char *eccmask;
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};
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#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)
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int nand_ecc_sw_bch_calculate(struct nand_device *nand,
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const unsigned char *buf, unsigned char *code);
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int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf,
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unsigned char *read_ecc, unsigned char *calc_ecc);
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int nand_ecc_sw_bch_init_ctx(struct nand_device *nand);
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void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand);
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struct nand_ecc_engine *nand_ecc_sw_bch_get_engine(void);
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#else /* !CONFIG_MTD_NAND_ECC_SW_BCH */
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static inline int nand_ecc_sw_bch_calculate(struct nand_device *nand,
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const unsigned char *buf,
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unsigned char *code)
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{
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return -ENOTSUPP;
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}
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static inline int nand_ecc_sw_bch_correct(struct nand_device *nand,
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unsigned char *buf,
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unsigned char *read_ecc,
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unsigned char *calc_ecc)
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{
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return -ENOTSUPP;
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}
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static inline int nand_ecc_sw_bch_init_ctx(struct nand_device *nand)
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{
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return -ENOTSUPP;
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}
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static inline void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand) {}
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#endif /* CONFIG_MTD_NAND_ECC_SW_BCH */
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#endif /* __MTD_NAND_ECC_SW_BCH_H__ */
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