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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com>4 *5 * This file is the header for the NAND BCH ECC implementation.6 */7 8#ifndef __MTD_NAND_ECC_SW_BCH_H__9#define __MTD_NAND_ECC_SW_BCH_H__10 11#include <linux/mtd/nand.h>12#include <linux/bch.h>13 14/**15 * struct nand_ecc_sw_bch_conf - private software BCH ECC engine structure16 * @req_ctx: Save request context and tweak the original request to fit the17 * engine needs18 * @code_size: Number of bytes needed to store a code (one code per step)19 * @calc_buf: Buffer to use when calculating ECC bytes20 * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip21 * @bch: BCH control structure22 * @errloc: error location array23 * @eccmask: XOR ecc mask, allows erased pages to be decoded as valid24 */25struct nand_ecc_sw_bch_conf {26 struct nand_ecc_req_tweak_ctx req_ctx;27 unsigned int code_size;28 u8 *calc_buf;29 u8 *code_buf;30 struct bch_control *bch;31 unsigned int *errloc;32 unsigned char *eccmask;33};34 35#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)36 37int nand_ecc_sw_bch_calculate(struct nand_device *nand,38 const unsigned char *buf, unsigned char *code);39int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf,40 unsigned char *read_ecc, unsigned char *calc_ecc);41int nand_ecc_sw_bch_init_ctx(struct nand_device *nand);42void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand);43struct nand_ecc_engine *nand_ecc_sw_bch_get_engine(void);44 45#else /* !CONFIG_MTD_NAND_ECC_SW_BCH */46 47static inline int nand_ecc_sw_bch_calculate(struct nand_device *nand,48 const unsigned char *buf,49 unsigned char *code)50{51 return -ENOTSUPP;52}53 54static inline int nand_ecc_sw_bch_correct(struct nand_device *nand,55 unsigned char *buf,56 unsigned char *read_ecc,57 unsigned char *calc_ecc)58{59 return -ENOTSUPP;60}61 62static inline int nand_ecc_sw_bch_init_ctx(struct nand_device *nand)63{64 return -ENOTSUPP;65}66 67static inline void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand) {}68 69#endif /* CONFIG_MTD_NAND_ECC_SW_BCH */70 71#endif /* __MTD_NAND_ECC_SW_BCH_H__ */72