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nand_write(9) [centos man page]

NAND_WRITE(9)						    Internal Functions Provided 					     NAND_WRITE(9)

NAME
nand_write - [MTD Interface] NAND write with ECC SYNOPSIS
int nand_write(struct mtd_info * mtd, loff_t to, size_t len, size_t * retlen, const uint8_t * buf); ARGUMENTS
mtd MTD device structure to offset to write to len number of bytes to write retlen pointer to variable to store the number of written bytes buf the data to write DESCRIPTION
NAND write with ECC. AUTHOR
Thomas Gleixner <tglx@linutronix.de> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 NAND_WRITE(9)

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STRUCT 
NAND_CHIP(9) Structures 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; uint64_t chipsize; int pagemask; int pagebuf; int subpagesize; uint8_t cellinfo; int badblockpos; 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; 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. July 2010 STRUCT NAND_CHIP(9)
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