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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * BCH Error Location Module
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
 */

#ifndef __ELM_H
#define __ELM_H

enum bch_ecc {
	BCH4_ECC = 0,
	BCH8_ECC,
	BCH16_ECC,
};

/* ELM support 8 error syndrome process */
#define ERROR_VECTOR_MAX		8

/**
 * struct elm_errorvec - error vector for elm
 * @error_reported:		set true for vectors error is reported
 * @error_uncorrectable:	number of uncorrectable errors
 * @error_count:		number of correctable errors in the sector
 * @error_loc:			buffer for error location
 *
 */
struct elm_errorvec {
	bool error_reported;
	bool error_uncorrectable;
	int error_count;
	int error_loc[16];
};

#if IS_ENABLED(CONFIG_MTD_NAND_OMAP_BCH)
void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,
		struct elm_errorvec *err_vec);
int elm_config(struct device *dev, enum bch_ecc bch_type,
	int ecc_steps, int ecc_step_size, int ecc_syndrome_size);
#else
sta