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91 lines
2.7 KiB
91 lines
2.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2000-2010 Steven J. Hill <[email protected]> |
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* David Woodhouse <[email protected]> |
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* Thomas Gleixner <[email protected]> |
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* |
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* This file is the header for the NAND Hamming ECC implementation. |
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*/ |
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#ifndef __MTD_NAND_ECC_SW_HAMMING_H__ |
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#define __MTD_NAND_ECC_SW_HAMMING_H__ |
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#include <linux/mtd/nand.h> |
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/** |
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* struct nand_ecc_sw_hamming_conf - private software Hamming 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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* @sm_order: Smart Media special ordering |
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*/ |
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struct nand_ecc_sw_hamming_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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unsigned int sm_order; |
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}; |
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#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING) |
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int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand); |
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void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand); |
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int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size, |
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unsigned char *code, bool sm_order); |
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int nand_ecc_sw_hamming_calculate(struct nand_device *nand, |
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const unsigned char *buf, |
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unsigned char *code); |
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int ecc_sw_hamming_correct(unsigned char *buf, unsigned char *read_ecc, |
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unsigned char *calc_ecc, unsigned int step_size, |
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bool sm_order); |
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int nand_ecc_sw_hamming_correct(struct nand_device *nand, unsigned char *buf, |
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unsigned char *read_ecc, |
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unsigned char *calc_ecc); |
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#else /* !CONFIG_MTD_NAND_ECC_SW_HAMMING */ |
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static inline int nand_ecc_sw_hamming_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_hamming_cleanup_ctx(struct nand_device *nand) {} |
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static inline int ecc_sw_hamming_calculate(const unsigned char *buf, |
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unsigned int step_size, |
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unsigned char *code, bool sm_order) |
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{ |
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return -ENOTSUPP; |
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} |
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static inline int nand_ecc_sw_hamming_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 ecc_sw_hamming_correct(unsigned char *buf, |
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unsigned char *read_ecc, |
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unsigned char *calc_ecc, |
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unsigned int step_size, bool sm_order) |
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{ |
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return -ENOTSUPP; |
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} |
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static inline int nand_ecc_sw_hamming_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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#endif /* CONFIG_MTD_NAND_ECC_SW_HAMMING */ |
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#endif /* __MTD_NAND_ECC_SW_HAMMING_H__ */
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