struct nand_chip(9)

NAME

struct_nand_chip - NAND Private Flash Chip Data

SYNOPSIS

struct nand_chip {
  void __iomem * IO_ADDR_R;
  void __iomem * IO_ADDR_W;
  uint8_t (* read_byte) (struct mtd_info *mtd);
  u16 (* read_word) (struct mtd_info *mtd);
  void (* write_buf) (struct mtd_info *mtd, const uint8_t *buf, int len);
  void (* read_buf) (struct mtd_info *mtd, uint8_t *buf, int len);
  int (* verify_buf) (struct mtd_info *mtd, const uint8_t *buf, int len);
  void (* select_chip) (struct mtd_info *mtd, int chip);
  int (* block_bad) (struct mtd_info *mtd, loff_t ofs, int getchip);
  int (* block_markbad) (struct mtd_info *mtd, loff_t ofs);
  void (* cmd_ctrl) (struct mtd_info *mtd, int dat,unsigned int ctrl);
  int (* dev_ready) (struct mtd_info *mtd);
  void (* cmdfunc) (struct mtd_info *mtd, unsigned command, int column, int page_addr);
  int (* waitfunc) (struct mtd_info *mtd, struct nand_chip *this);
  void (* erase_cmd) (struct mtd_info *mtd, int page);
  int (* scan_bbt) (struct mtd_info *mtd);
  int (* errstat) (struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
  int (* write_page) (struct mtd_info *mtd, struct nand_chip *chip,const uint8_t *buf, int page, int cached, int raw);
  int chip_delay;
  unsigned int options;
  int page_shift;
  int phys_erase_shift;
  int bbt_erase_shift;
  int chip_shift;
  int numchips;
  unsigned long chipsize;
  int pagemask;
  int pagebuf;
  int subpagesize;
  uint8_t cellinfo;
  int badblockpos;
  nand_state_t state;
  uint8_t * oob_poi;
  struct nand_hw_control * controller;
  struct nand_ecclayout * ecclayout;
  struct nand_ecc_ctrl ecc;
  struct nand_buffers * buffers;
  struct nand_hw_control hwcontrol;
  struct mtd_oob_ops ops;
  uint8_t * bbt;
  struct nand_bbt_descr * bbt_td;
  struct nand_bbt_descr * bbt_md;
  struct nand_bbt_descr * badblock_pattern;
  void * priv;
};

MEMBERS

IO_ADDR_R

[BOARDSPECIFIC] address to read the 8 I/O lines of the flash device

IO_ADDR_W

[BOARDSPECIFIC] address to write the 8 I/O lines of the flash
device

read_byte

[REPLACEABLE] read one byte from the chip

read_word

[REPLACEABLE] read one word from the chip

write_buf

[REPLACEABLE] write data from the buffer to the chip

read_buf

[REPLACEABLE] read data from the chip into the buffer

verify_buf

[REPLACEABLE] verify buffer contents against the chip data

select_chip

[REPLACEABLE] select chip nr

block_bad

[REPLACEABLE] check, if the block is bad

block_markbad

[REPLACEABLE] mark the block bad

cmd_ctrl

[BOARDSPECIFIC] hardwarespecific funtion for controlling
ALE/CLE/nCE. Also used to write command and address

dev_ready

[BOARDSPECIFIC] hardwarespecific function for accesing device
ready/busy line If set to NULL no access to ready/busy is available and the ready/busy information is read from the chip status
register

cmdfunc

[REPLACEABLE] hardwarespecific function for writing commands to the chip

waitfunc

[REPLACEABLE] hardwarespecific function for wait on ready

erase_cmd

[INTERN] erase command write function, selectable due to AND
support

scan_bbt

[REPLACEABLE] function to scan bad block table

errstat

[OPTIONAL] hardware specific function to perform additional error
status checks (determine if errors are correctable)

write_page

[REPLACEABLE] High-level page write function

chip_delay

[BOARDSPECIFIC] chip dependent delay for transfering data from
array to read regs (tR)

options

[BOARDSPECIFIC] various chip options. They can partly be set to
inform nand_scan about special functionality. See the defines for
further explanation

page_shift

[INTERN] number of address bits in a page (column address bits)

phys_erase_shift

[INTERN] number of address bits in a physical eraseblock

bbt_erase_shift

[INTERN] number of address bits in a bbt entry

chip_shift

[INTERN] number of address bits in one chip

numchips

[INTERN] number of physical chips

chipsize

[INTERN] the size of one chip for multichip arrays

pagemask

[INTERN] page number mask = number of (pages / chip) - 1

pagebuf

[INTERN] holds the pagenumber which is currently in data_buf

subpagesize

[INTERN] holds the subpagesize

cellinfo

[INTERN] MLC/multichip data from chip ident

badblockpos

[INTERN] position of the bad block marker in the oob area

state

[INTERN] the current state of the NAND device

oob_poi

poison value buffer

controller

[REPLACEABLE] a pointer to a hardware controller structure which is shared among multiple independend devices

ecclayout

[REPLACEABLE] the default ecc placement scheme

ecc

[BOARDSPECIFIC] ecc control ctructure

buffers

buffer structure for read/write

hwcontrol

platform-specific hardware control structure

ops

oob operation operands

bbt

[INTERN] bad block table pointer

bbt_td

[REPLACEABLE] bad block table descriptor for flash lookup

bbt_md

[REPLACEABLE] bad block table mirror descriptor

badblock_pattern

[REPLACEABLE] bad block scan pattern used for initial bad block
scan

priv

[OPTIONAL] pointer to private chip date

AUTHOR

Thomas Gleixner <tglx@linutronix.de>

Author.

COPYRIGHT

Kernel Hackers Manual 2.6. August 2009 STRUCT NAND_CHIP(9)