MTD NAND Driver Programming Interface

Table of Contents

1. Introduction

2. Known Bugs And Assumptions

3. Documentation hints

Function identifiers [XXX]

Struct member identifiers [XXX]

4. Basic board driver

Basic defines

Partition defines

Hardware control function

Device ready function

Init function

Exit function

5. Advanced board driver functions

Multiple chip control

Hardware ECC support

Functions and constants

Hardware ECC with syndrome calculation

Bad block table support

Flash based tables

User defined tables

Spare area (auto)placement

Placement defined by fs driver

Automatic placement

Spare area autoplacement default schemes

256 byte pagesize

512 byte pagesize

2048 byte pagesize

6. Filesystem support

7. Tools

8. Constants

Chip option constants

Constants for chip id table

Constants for runtime options

ECC selection constants

Hardware control related constants

Bad block table related constants

9. Structures

struct nand_hw_control — Control structure for hardware controller (e.g ECC generator) shared among independent devices

struct nand_ecc_ctrl — Control structure for ECC

struct nand_buffers — buffer structure for read/write

struct nand_chip — NAND Private Flash Chip Data

struct nand_flash_dev — NAND Flash Device ID Structure

struct nand_manufacturers — NAND Flash Manufacturer ID Structure

struct platform_nand_chip — chip level device structure

struct platform_nand_ctrl — controller level device structure

struct platform_nand_data — container structure for platform-specific data

nand_opcode_8bits —

10. Public Functions Provided

nand_unlock — [REPLACEABLE] unlocks specified locked blocks

nand_lock — [REPLACEABLE] locks all blocks present in the device

nand_scan_ident — [NAND Interface] Scan for the NAND device

nand_scan_tail — [NAND Interface] Scan for the NAND device

nand_scan — [NAND Interface] Scan for the NAND device

nand_release — [NAND Interface] Free resources held by the NAND device

nand_scan_bbt — [NAND Interface] scan, find, read and maybe create bad block table(s)

__nand_calculate_ecc — [NAND Interface] Calculate 3-byte ECC for 256/512-byte block

nand_calculate_ecc — [NAND Interface] Calculate 3-byte ECC for 256/512-byte block

__nand_correct_data — [NAND Interface] Detect and correct bit error(s)

nand_correct_data — [NAND Interface] Detect and correct bit error(s)

11. Internal Functions Provided

nand_release_device — [GENERIC] release chip

nand_read_byte — [DEFAULT] read one byte from the chip

nand_read_byte16 — [DEFAULT] read one byte endianness aware from the chip

nand_read_word — [DEFAULT] read one word from the chip

nand_select_chip — [DEFAULT] control CE line

nand_write_byte — [DEFAULT] write single byte to chip

nand_write_byte16 — [DEFAULT] write single byte to a chip with width 16

nand_write_buf — [DEFAULT] write buffer to chip

nand_read_buf — [DEFAULT] read chip data into buffer

nand_write_buf16 — [DEFAULT] write buffer to chip

nand_read_buf16 — [DEFAULT] read chip data into buffer

nand_block_bad — [DEFAULT] Read bad block marker from the chip

nand_default_block_markbad — [DEFAULT] mark a block bad via bad block marker

nand_block_markbad_lowlevel — mark a block bad

nand_check_wp — [GENERIC] check if the chip is write protected

nand_block_isreserved — [GENERIC] Check if a block is marked reserved.

nand_block_checkbad — [GENERIC] Check if a block is marked bad

panic_nand_wait_ready — [GENERIC] Wait for the ready pin after commands.

nand_wait_status_ready — [GENERIC] Wait for the ready status after commands.

nand_command — [DEFAULT] Send command to NAND device

nand_command_lp — [DEFAULT] Send command to NAND large page device

panic_nand_get_device — [GENERIC] Get chip for selected access

nand_get_device — [GENERIC] Get chip for selected access

panic_nand_wait — [GENERIC] wait until the command is done

nand_wait — [DEFAULT] wait until the command is done

__nand_unlock — [REPLACEABLE] unlocks specified locked blocks

nand_read_page_raw — [INTERN] read raw page data without ecc

nand_read_page_raw_syndrome — [INTERN] read raw page data without ecc

nand_read_page_swecc — [REPLACEABLE] software ECC based page read function

nand_read_subpage — [REPLACEABLE] ECC based sub-page read function

nand_read_page_hwecc — [REPLACEABLE] hardware ECC based page read function

nand_read_page_hwecc_oob_first — [REPLACEABLE] hw ecc, read oob first

nand_read_page_syndrome — [REPLACEABLE] hardware ECC syndrome based page read

nand_transfer_oob — [INTERN] Transfer oob to client buffer

nand_setup_read_retry — [INTERN] Set the READ RETRY mode

nand_do_read_ops — [INTERN] Read data with ECC

nand_read — [MTD Interface] MTD compatibility function for nand_do_read_ecc

nand_read_oob_std — [REPLACEABLE] the most common OOB data read function

nand_read_oob_syndrome — [REPLACEABLE] OOB data read function for HW ECC with syndromes

nand_write_oob_std — [REPLACEABLE] the most common OOB data write function

nand_write_oob_syndrome — [REPLACEABLE] OOB data write function for HW ECC with syndrome - only for large page flash

nand_do_read_oob — [INTERN] NAND read out-of-band

nand_read_oob — [MTD Interface] NAND read data and/or out-of-band

nand_write_page_raw — [INTERN] raw page write function

nand_write_page_raw_syndrome — [INTERN] raw page write function

nand_write_page_swecc — [REPLACEABLE] software ECC based page write function

nand_write_page_hwecc — [REPLACEABLE] hardware ECC based page write function

nand_write_subpage_hwecc — [REPLACEABLE] hardware ECC based subpage write

nand_write_page_syndrome — [REPLACEABLE] hardware ECC syndrome based page write

nand_write_page — [REPLACEABLE] write one page

nand_fill_oob — [INTERN] Transfer client buffer to oob

nand_do_write_ops — [INTERN] NAND write with ECC

panic_nand_write — [MTD Interface] NAND write with ECC

nand_write — [MTD Interface] NAND write with ECC

nand_do_write_oob — [MTD Interface] NAND write out-of-band

nand_write_oob — [MTD Interface] NAND write data and/or out-of-band

single_erase — [GENERIC] NAND standard block erase command function

nand_erase — [MTD Interface] erase block(s)

nand_erase_nand — [INTERN] erase block(s)

nand_sync — [MTD Interface] sync

nand_block_isbad — [MTD Interface] Check if block at offset is bad

nand_block_markbad — [MTD Interface] Mark block at the given offset as bad

nand_onfi_set_features — [REPLACEABLE] set features for ONFI nand

nand_onfi_get_features — [REPLACEABLE] get features for ONFI nand

nand_suspend — [MTD Interface] Suspend the NAND flash

nand_resume — [MTD Interface] Resume the NAND flash

nand_shutdown — [MTD Interface] Finish the current NAND operation and prevent further operations

check_pattern — [GENERIC] check if a pattern is in the buffer

check_short_pattern — [GENERIC] check if a pattern is in the buffer

add_marker_len — compute the length of the marker in data area

read_bbt — [GENERIC] Read the bad block table starting from page

read_abs_bbt — [GENERIC] Read the bad block table starting at a given page

scan_read_oob — [GENERIC] Scan data+OOB region to buffer

read_abs_bbts — [GENERIC] Read the bad block table(s) for all chips starting at a given page

create_bbt — [GENERIC] Create a bad block table by scanning the device

search_bbt — [GENERIC] scan the device for a specific bad block table

search_read_bbts — [GENERIC] scan the device for bad block table(s)

write_bbt — [GENERIC] (Re)write the bad block table

nand_memory_bbt — [GENERIC] create a memory based bad block table

check_create — [GENERIC] create and write bbt(s) if necessary

mark_bbt_region — [GENERIC] mark the bad block table regions

verify_bbt_descr — verify the bad block description

nand_update_bbt — update bad block table(s)

nand_create_badblock_pattern — [INTERN] Creates a BBT descriptor structure

nand_default_bbt — [NAND Interface] Select a default bad block table for the device

nand_isreserved_bbt — [NAND Interface] Check if a block is reserved

nand_isbad_bbt — [NAND Interface] Check if a block is bad

nand_markbad_bbt — [NAND Interface] Mark a block bad in the BBT

12. Credits