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73 lines
2.1 KiB
73 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright © 2011 Ivan Djelic <[email protected]> |
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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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