STRUCT NAND_CHIP - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2.6.
Note : Structures
NAMEstruct_nand_chip − NAND Private Flash Chip Data
SYNOPSISstruct 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;
uint64_t 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;
};
MEMBERSIO_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
AUTHORThomas Gleixner <tglx@linutronix.de> Author.
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