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- wheezy 3.2.78-1
STRUCT NAND_CHIP(9) | Structures | STRUCT NAND_CHIP(9) |
NAME¶
struct_nand_chip - NAND Private Flash Chip DataSYNOPSIS¶
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 (* 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,const uint8_t *buf, int page, int cached, int raw); 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; 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
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 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
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.
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] number of bits to left-shift the bad
block number
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 <tglx@linutronix.de>Author.
COPYRIGHT¶
March 2016 | Kernel Hackers Manual 3.2. |