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* (C) Copyright 2005
* 2N Telekomunikace, a.s. <>
* Ladislav Michl <>
* See file CREDITS for list of people who contributed to this
* project.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
#ifndef _NAND_H_
#define _NAND_H_
#include <config.h>
* All boards using a given driver must convert to self-init
* at the same time, so do it here. When all drivers are
* converted, this will go away.
extern void nand_init(void);
#include <linux/compat.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
void board_nand_init(void);
int nand_register(int devnum);
extern int board_nand_init(struct nand_chip *nand);
typedef struct mtd_info nand_info_t;
extern int nand_curr_device;
extern nand_info_t nand_info[];
#if defined(CONFIG_ENV_IS_IN_NAND)
extern int nand_get_env_offs(void);
extern int nand_get_env_range(void);
static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
return info->read(info, ofs, *len, (size_t *)len, buf);
static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
return info->write(info, ofs, *len, (size_t *)len, buf);
static inline int nand_block_isbad(nand_info_t *info, loff_t ofs)
return info->block_isbad(info, ofs);
static inline int nand_erase(nand_info_t *info, loff_t off, size_t size)
struct erase_info instr;
instr.mtd = info;
instr.addr = off;
instr.len = size;
instr.callback = 0;
return info->erase(info, &instr);
* declarations from nand_util.c
struct nand_write_options {
u_char *buffer; /* memory block containing image to write */
ulong length; /* number of bytes to write */
ulong offset; /* start address in NAND */
int quiet; /* don't display progress messages */
int autoplace; /* if true use auto oob layout */
int forcejffs2; /* force jffs2 oob layout */
int forceyaffs; /* force yaffs oob layout */
int noecc; /* write without ecc */
int writeoob; /* image contains oob data */
int pad; /* pad to page size */
int blockalign; /* 1|2|4 set multiple of eraseblocks
* to align to */
typedef struct nand_write_options nand_write_options_t;
typedef struct mtd_oob_ops mtd_oob_ops_t;
struct nand_read_options {
u_char *buffer; /* memory block in which read image is written*/
ulong length; /* number of bytes to read */
ulong offset; /* start address in NAND */
int quiet; /* don't display progress messages */
int readoob; /* put oob data in image */
typedef struct nand_read_options nand_read_options_t;
struct nand_erase_options {
loff_t length; /* number of bytes to erase */
loff_t offset; /* first address in NAND to erase */
int quiet; /* don't display progress messages */
int jffs2; /* if true: format for jffs2 usage
* (write appropriate cleanmarker blocks) */
int scrub; /* if true, really clean NAND by erasing
* bad blocks (UNSAFE) */
/* Don't include skipped bad blocks in size to be erased */
int spread;
typedef struct nand_erase_options nand_erase_options_t;
int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
u_char *buffer);
#define WITH_YAFFS_OOB (1 << 0) /* whether write with yaffs format. This flag
* is a 'mode' meaning it cannot be mixed with
* other flags */
#define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */
int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
u_char *buffer, int flags);
int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
int nand_torture(nand_info_t *nand, loff_t offset);
int nand_lock(nand_info_t *meminfo, int tight);
int nand_unlock(nand_info_t *meminfo, loff_t start, size_t length,
int allexcept);
int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst);
void nand_deselect(void);
void board_nand_select_device(struct nand_chip *nand, int chip);
__attribute__((noreturn)) void nand_boot(void);
#define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
as block number*/
#define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
stored as byte number */
int get_nand_env_oob(nand_info_t *nand, unsigned long *result);