struct nand_chip
Prev | Chapter 9. Structures | Next

## 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

Prev | Up | Next
struct nand_buffers | Home | struct nand_flash_dev