linux/drivers/mtd/nand/raw/nand_onfi.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  Copyright (C) 2000 Steven J. Hill ([email protected])
 *		  2002-2006 Thomas Gleixner ([email protected])
 *
 *  Credits:
 *	David Woodhouse for adding multichip support
 *
 *	Aleph One Ltd. and Toby Churchill Ltd. for supporting the
 *	rework for 2K page size chips
 *
 * This file contains all ONFI helpers.
 */

#include <linux/slab.h>

#include "internals.h"

#define ONFI_PARAM_PAGES …

u16 onfi_crc16(u16 crc, u8 const *p, size_t len)
{ … }

/* Parse the Extended Parameter Page. */
static int nand_flash_detect_ext_param_page(struct nand_chip *chip,
					    struct nand_onfi_params *p)
{ … }

/*
 * Recover data with bit-wise majority
 */
static void nand_bit_wise_majority(const void **srcbufs,
				   unsigned int nsrcbufs,
				   void *dstbuf,
				   unsigned int bufsize)
{ … }

/*
 * Check if the NAND chip is ONFI compliant, returns 1 if it is, 0 otherwise.
 */
int nand_onfi_detect(struct nand_chip *chip)
{ … }