name : nand-ecc-sw-hamming.h /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2000-2010 Steven J. Hill <sjhill@realitydiluted.com> * David Woodhouse <dwmw2@infradead.org> * Thomas Gleixner <tglx@linutronix.de> * * This file is the header for the NAND Hamming ECC implementation. */ #ifndef __MTD_NAND_ECC_SW_HAMMING_H__ #define __MTD_NAND_ECC_SW_HAMMING_H__ #include <linux/mtd/nand.h> /** * struct nand_ecc_sw_hamming_conf - private software Hamming ECC engine structure * @req_ctx: Save request context and tweak the original request to fit the * engine needs * @code_size: Number of bytes needed to store a code (one code per step) * @calc_buf: Buffer to use when calculating ECC bytes * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip * @sm_order: Smart Media special ordering */ struct nand_ecc_sw_hamming_conf { struct nand_ecc_req_tweak_ctx req_ctx; unsigned int code_size; u8 *calc_buf; u8 *code_buf; unsigned int sm_order; }; #if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING) int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand); void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand); int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size, unsigned char *code, bool sm_order); int nand_ecc_sw_hamming_calculate(struct nand_device *nand, const unsigned char *buf, unsigned char *code); int ecc_sw_hamming_correct(unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc, unsigned int step_size, bool sm_order); int nand_ecc_sw_hamming_correct(struct nand_device *nand, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc); #else /* !CONFIG_MTD_NAND_ECC_SW_HAMMING */ static inline int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand) { return -ENOTSUPP; } static inline void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand) {} static inline int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size, unsigned char *code, bool sm_order) { return -ENOTSUPP; } static inline int nand_ecc_sw_hamming_calculate(struct nand_device *nand, const unsigned char *buf, unsigned char *code) { return -ENOTSUPP; } static inline int ecc_sw_hamming_correct(unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc, unsigned int step_size, bool sm_order) { return -ENOTSUPP; } static inline int nand_ecc_sw_hamming_correct(struct nand_device *nand, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc) { return -ENOTSUPP; } #endif /* CONFIG_MTD_NAND_ECC_SW_HAMMING */ #endif /* __MTD_NAND_ECC_SW_HAMMING_H__ */