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nand_command(9) [centos man page]

NAND_COMMAND(9) 					    Internal Functions Provided 					   NAND_COMMAND(9)

nand_command - [DEFAULT] Send command to NAND device SYNOPSIS
void nand_command(struct mtd_info * mtd, unsigned int command, int column, int page_addr); ARGUMENTS
mtd MTD device structure command the command to be sent column the column address for this command, -1 if none page_addr the page address for this command, -1 if none DESCRIPTION
Send command to NAND device. This function is used for small page devices (512 Bytes per page). AUTHOR
Thomas Gleixner <> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 NAND_COMMAND(9)

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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); 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; }; 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_descr's. 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 block's 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 AUTHOR
Thomas Gleixner <> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 STRUCT NAND_CHIP(9)

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