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* linux/include/linux/mtd/onenand.h
* Copyright © 2005-2009 Samsung Electronics
* Kyungmin Park <>
* 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.
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/mtd/flashchip.h>
#include <linux/mtd/onenand_regs.h>
#include <linux/mtd/bbm.h>
#define MAX_DIES 2
/* Scan and identify a OneNAND device */
extern int onenand_scan(struct mtd_info *mtd, int max_chips);
/* Free resources held by the OneNAND device */
extern void onenand_release(struct mtd_info *mtd);
* struct onenand_bufferram - OneNAND BufferRAM Data
* @blockpage: block & page address in BufferRAM
struct onenand_bufferram {
int blockpage;
* struct onenand_chip - OneNAND Private Flash Chip Data
* @base: [BOARDSPECIFIC] address to access OneNAND
* @dies: [INTERN][FLEX-ONENAND] number of dies on chip
* @boundary: [INTERN][FLEX-ONENAND] Boundary of the dies
* @diesize: [INTERN][FLEX-ONENAND] Size of the dies
* @chipsize: [INTERN] the size of one chip for multichip arrays
* FIXME For Flex-OneNAND, chipsize holds maximum possible
* device size ie when all blocks are considered MLC
* @device_id: [INTERN] device ID
* @density_mask: chip density, used for DDP devices
* @verstion_id: [INTERN] version ID
* @options: [BOARDSPECIFIC] various chip options. They can
* partly be set to inform onenand_scan about
* @erase_shift: [INTERN] number of address bits in a block
* @page_shift: [INTERN] number of address bits in a page
* @page_mask: [INTERN] a page per block mask
* @writesize: [INTERN] a real page size
* @bufferram_index: [INTERN] BufferRAM index
* @bufferram: [INTERN] BufferRAM info
* @readw: [REPLACEABLE] hardware specific function for read short
* @writew: [REPLACEABLE] hardware specific function for write short
* @command: [REPLACEABLE] hardware specific function for writing
* commands to the chip
* @wait: [REPLACEABLE] hardware specific function for wait on ready
* @bbt_wait: [REPLACEABLE] hardware specific function for bbt wait on ready
* @unlock_all: [REPLACEABLE] hardware specific function for unlock all
* @read_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area
* @write_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area
* @read_word: [REPLACEABLE] hardware specific function for read
* register of OneNAND
* @write_word: [REPLACEABLE] hardware specific function for write
* register of OneNAND
* @mmcontrol: sync burst read function
* @chip_probe: [REPLACEABLE] hardware specific function for chip probe
* @block_markbad: function to mark a block as bad
* @scan_bbt: [REPLACEALBE] hardware specific function for scanning
* Bad block Table
* @chip_lock: [INTERN] spinlock used to protect access to this
* structure and the chip
* @wq: [INTERN] wait queue to sleep on if a OneNAND
* operation is in progress
* @state: [INTERN] the current state of the OneNAND device
* @page_buf: [INTERN] page main data buffer
* @oob_buf: [INTERN] page oob data buffer
* @subpagesize: [INTERN] holds the subpagesize
* @bbm: [REPLACEABLE] pointer to Bad Block Management
* @priv: [OPTIONAL] pointer to private chip date
struct onenand_chip {
void __iomem *base;
unsigned dies;
unsigned boundary[MAX_DIES];
loff_t diesize[MAX_DIES];
unsigned int chipsize;
unsigned int device_id;
unsigned int version_id;
unsigned int technology;
unsigned int density_mask;
unsigned int options;
unsigned int erase_shift;
unsigned int page_shift;
unsigned int page_mask;
unsigned int writesize;
unsigned int bufferram_index;
struct onenand_bufferram bufferram[MAX_BUFFERRAM];
int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len);
int (*wait)(struct mtd_info *mtd, int state);
int (*bbt_wait)(struct mtd_info *mtd, int state);
void (*unlock_all)(struct mtd_info *mtd);
int (*read_bufferram)(struct mtd_info *mtd, int area,
unsigned char *buffer, int offset, size_t count);
int (*write_bufferram)(struct mtd_info *mtd, int area,
const unsigned char *buffer, int offset, size_t count);
unsigned short (*read_word)(void __iomem *addr);
void (*write_word)(unsigned short value, void __iomem *addr);
void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
int (*chip_probe)(struct mtd_info *mtd);
int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
int (*scan_bbt)(struct mtd_info *mtd);
int (*enable)(struct mtd_info *mtd);
int (*disable)(struct mtd_info *mtd);
struct completion complete;
int irq;
spinlock_t chip_lock;
wait_queue_head_t wq;
flstate_t state;
unsigned char *page_buf;
unsigned char *oob_buf;
unsigned char *verify_buf;
int subpagesize;
void *bbm;
void *priv;
* Shows that the current operation is composed
* of sequence of commands. For example, cache program.
* Such command status OnGo bit is checked at the end of
* sequence.
unsigned int ongoing;
* Helper macros
#define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
#define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
#define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
#define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1)
#define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0)
#define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1)
#define FLEXONENAND(this) \
(this->device_id & DEVICE_IS_FLEXONENAND)
#define ONENAND_GET_SYS_CFG1(this) \
(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
#define ONENAND_SET_SYS_CFG1(v, this) \
(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
#define ONENAND_IS_DDP(this) \
(this->device_id & ONENAND_DEVICE_IS_DDP)
#define ONENAND_IS_MLC(this) \
(this->technology & ONENAND_TECHNOLOGY_IS_MLC)
#define ONENAND_IS_2PLANE(this) \
(this->options & ONENAND_HAS_2PLANE)
#define ONENAND_IS_2PLANE(this) (0)
#define ONENAND_IS_NOP_1(this) \
(this->options & ONENAND_HAS_NOP_1)
/* Check byte access in OneNAND */
#define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1)
* Options bits
#define ONENAND_HAS_CONT_LOCK (0x0001)
#define ONENAND_HAS_UNLOCK_ALL (0x0002)
#define ONENAND_HAS_2PLANE (0x0004)
#define ONENAND_HAS_4KB_PAGE (0x0008)
#define ONENAND_HAS_NOP_1 (0x0020)
#define ONENAND_PAGEBUF_ALLOC (0x1000)
#define ONENAND_OOBBUF_ALLOC (0x2000)
#define ONENAND_IS_4KB_PAGE(this) \
(this->options & ONENAND_HAS_4KB_PAGE)
* OneNAND Flash Manufacturer ID Codes
* struct onenand_manufacturers - NAND Flash Manufacturer ID Structure
* @name: Manufacturer name
* @id: manufacturer ID code of device.
struct onenand_manufacturers {
int id;
char *name;
int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops);
unsigned onenand_block(struct onenand_chip *this, loff_t addr);
loff_t onenand_addr(struct onenand_chip *this, int block);
int flexonenand_region(struct mtd_info *mtd, loff_t addr);
struct mtd_partition;
struct onenand_platform_data {
void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
int (*read_bufferram)(struct mtd_info *mtd, int area,
unsigned char *buffer, int offset, size_t count);
struct mtd_partition *parts;
unsigned int nr_parts;
#endif /* __LINUX_MTD_ONENAND_H */