| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2000-2010 Steven J. Hill <[email protected]> |
| * David Woodhouse <[email protected]> |
| * Thomas Gleixner <[email protected]> |
| * |
| * 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__ */ |
