1. NAME

struct_nand_chip - NAND Private Flash Chip Data

2. SYNOPSIS



 
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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);
  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 (* init_size) (struct mtd_info *mtd, struct nand_chip *this,u8 *id_data);
  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,uint32_t offset, int data_len, const uint8_t *buf,int oob_required, int page, int cached, int raw);
  int (* onfi_set_features) (struct mtd_info *mtd, struct nand_chip *chip,int feature_addr, uint8_t *subfeature_para);
  int (* onfi_get_features) (struct mtd_info *mtd, struct nand_chip *chip,int feature_addr, uint8_t *subfeature_para);
  int chip_delay;
  unsigned int options;
  unsigned int bbt_options;
  int page_shift;
  int phys_erase_shift;
  int bbt_erase_shift;
  int chip_shift;
  int numchips;
  uint64_t chipsize;
  int pagemask;
  int pagebuf;
  unsigned int pagebuf_bitflips;
  int subpagesize;
  uint8_t cellinfo;
  int badblockpos;
  int badblockbits;
  int onfi_version;
  struct nand_onfi_params onfi_params;
  flstate_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;
  uint8_t * bbt;
  struct nand_bbt_descr * bbt_td;
  struct nand_bbt_descr * bbt_md;
  struct nand_bbt_descr * badblock_pattern;
  void * priv;
};

3. 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

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 function for controlling ALE/CLE/nCE. Also used to write command and address

init_size
    [BOARDSPECIFIC] hardwarespecific function for setting mtd->oobsize, mtd->writesize and so on. id_data contains the 8 bytes values of NAND_CMD_READID. Return with the bus width.

dev_ready
    [BOARDSPECIFIC] hardwarespecific function for accessing 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

onfi_set_features
    [REPLACEABLE] set the features for ONFI nand

onfi_get_features
    [REPLACEABLE] get the features for ONFI nand

chip_delay
    [BOARDSPECIFIC] chip dependent delay for transferring 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.

bbt_options
    [INTERN] bad block specific options. All options used here must come from bbm.h. By default, these options will be copied to the appropriate nand_bbt_descrAqs.

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.

pagebuf_bitflips
    [INTERN] holds the bitflip count for the page 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.

badblockbits
    [INTERN] minimum number of set bits in a good blockAqs bad block marker position; i.e., BBM == 11110111b is not bad when badblockbits == 7

onfi_version
    [INTERN] holds the chip ONFI version (BCD encoded), non 0 if ONFI supported.

onfi_params
    [INTERN] holds the ONFI page parameter when ONFI is supported, 0 otherwise.

state
    [INTERN] the current state of the NAND device

oob_poi
    "poison value buffer," used for laying out OOB data before writing

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

ecclayout
    [REPLACEABLE] the default ECC placement scheme

ecc
    [BOARDSPECIFIC] ECC control structure

buffers
    buffer structure for read/write

hwcontrol
    platform-specific hardware control structure

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 data

4. AUTHOR

Thomas Gleixner < >
    Author.

5. COPYRIGHT