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/*
* Copyright (c) 2019-2022, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef DRIVERS_NAND_H
#define DRIVERS_NAND_H
#include <stddef.h>
#include <stdint.h>
#include <lib/utils_def.h>
#define PSEC_TO_MSEC(x) div_round_up((x), 1000000000ULL)
struct ecc {
unsigned int mode; /* ECC mode NAND_ECC_MODE_{NONE|HW|ONDIE} */
unsigned int size; /* Data byte per ECC step */
unsigned int bytes; /* ECC bytes per step */
unsigned int max_bit_corr; /* Max correctible bits per ECC steps */
};
struct nand_device {
unsigned int block_size;
unsigned int page_size;
unsigned long long size;
unsigned int nb_planes;
unsigned int buswidth;
struct ecc ecc;
int (*mtd_block_is_bad)(unsigned int block);
int (*mtd_read_page)(struct nand_device *nand, unsigned int page,
uintptr_t buffer);
};
void plat_get_scratch_buffer(void **buffer_addr, size_t *buf_size);
/*
* Read bytes from NAND device
*
* @offset: Byte offset to read from in device
* @buffer: [out] Bytes read from device
* @length: Number of bytes to read
* @length_read: [out] Number of bytes read from device
* Return: 0 on success, a negative errno on failure
*/
int nand_read(unsigned int offset, uintptr_t buffer, size_t length,
size_t *length_read);
/*
* Look for an extra offset to be added in case of bad blocks
*
* @base: Base address of the area
* @offset: Byte offset to read from in device
* @extra_offset: [out] Extra offset to be added if bad blocks are found
* Return: 0 on success, a negative errno on failure
*/
int nand_seek_bb(uintptr_t base, unsigned int offset, size_t *extra_offset);
/*
* Get NAND device instance
*
* Return: NAND device instance reference
*/
struct nand_device *get_nand_device(void);
#endif /* DRIVERS_NAND_H */
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