mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-21 01:51:18 +00:00
80fe603160
This code is meant to be reused by the SPI-NAND core. Now that the driver has been cleaned and reorganized, use a generic ECC engine object to store the driver's data instead of accessing members of the nand_chip structure. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-9-miquel.raynal@bootlin.com
73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com>
|
|
*
|
|
* This file is the header for the NAND BCH ECC implementation.
|
|
*/
|
|
|
|
#ifndef __MTD_NAND_ECC_SW_BCH_H__
|
|
#define __MTD_NAND_ECC_SW_BCH_H__
|
|
|
|
#include <linux/mtd/nand.h>
|
|
#include <linux/bch.h>
|
|
|
|
/**
|
|
* struct nand_ecc_sw_bch_conf - private software BCH ECC engine structure
|
|
* @reqooblen: Save the actual user OOB length requested before overwriting it
|
|
* @spare_oobbuf: Spare OOB buffer if none is provided
|
|
* @code_size: Number of bytes needed to store a code (one code per step)
|
|
* @nsteps: Number of steps
|
|
* @calc_buf: Buffer to use when calculating ECC bytes
|
|
* @code_buf: Buffer to use when reading (raw) ECC bytes from the chip
|
|
* @bch: BCH control structure
|
|
* @errloc: error location array
|
|
* @eccmask: XOR ecc mask, allows erased pages to be decoded as valid
|
|
*/
|
|
struct nand_ecc_sw_bch_conf {
|
|
unsigned int reqooblen;
|
|
void *spare_oobbuf;
|
|
unsigned int code_size;
|
|
unsigned int nsteps;
|
|
u8 *calc_buf;
|
|
u8 *code_buf;
|
|
struct bch_control *bch;
|
|
unsigned int *errloc;
|
|
unsigned char *eccmask;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)
|
|
|
|
int nand_ecc_sw_bch_calculate(struct nand_device *nand,
|
|
const unsigned char *buf, unsigned char *code);
|
|
int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf,
|
|
unsigned char *read_ecc, unsigned char *calc_ecc);
|
|
int nand_ecc_sw_bch_init(struct nand_device *nand);
|
|
void nand_ecc_sw_bch_cleanup(struct nand_device *nand);
|
|
|
|
#else /* !CONFIG_MTD_NAND_ECC_SW_BCH */
|
|
|
|
static inline int nand_ecc_sw_bch_calculate(struct nand_device *nand,
|
|
const unsigned char *buf,
|
|
unsigned char *code)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int nand_ecc_sw_bch_correct(struct nand_device *nand,
|
|
unsigned char *buf,
|
|
unsigned char *read_ecc,
|
|
unsigned char *calc_ecc)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int nand_ecc_sw_bch_init(struct nand_device *nand)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline void nand_ecc_sw_bch_cleanup(struct nand_device *nand) {}
|
|
|
|
#endif /* CONFIG_MTD_NAND_ECC_SW_BCH */
|
|
|
|
#endif /* __MTD_NAND_ECC_SW_BCH_H__ */
|