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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* NAND family Bad Block Management (BBM) header file
* - Bad Block Table (BBT) implementation
*
* Copyright © 2005 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* Copyright © 2000-2005
* Thomas Gleixner <tglx@linuxtronix.de>
*/
#ifndef __LINUX_MTD_BBM_H
#define __LINUX_MTD_BBM_H
/* The maximum number of NAND chips in an array */
#define NAND_MAX_CHIPS 8
/**
* struct nand_bbt_descr - bad block table descriptor
* @options: options for this descriptor
* @pages: the page(s) where we find the bbt, used with option BBT_ABSPAGE
* when bbt is searched, then we store the found bbts pages here.
* Its an array and supports up to 8 chips now
* @offs: offset of the pattern in the oob area of the page
* @veroffs: offset of the bbt version counter in the oob are of the page
* @version: version read from the bbt page during scan
* @len: length of the pattern, if 0 no pattern check is performed
* @maxblocks: maximum number of blocks to search for a bbt. This number of
* blocks is reserved at the end of the device where the tables are
* written.
* @reserved_block_code: if non-0, this pattern denotes a reserved (rather than
* bad) block in the stored bbt
* @pattern: pattern to identify bad block table or factory marked good /
* bad blocks, can be NULL, if len = 0
*
* Descriptor for the bad block table marker and the descriptor for the
* pattern which identifies good and bad blocks. The assumption is made
* that the pattern and the version count are always located in the oob area
* of the first block.
*/
struct nand_bbt_descr {
int options;
int pages[NAND_MAX_CHIPS];
int offs;
int veroffs;
uint8_t version[NAND_MAX_CHIPS];
int len;
int maxblocks;
int reserved_block_code;
uint8_t *pattern;
};
/* Options for the bad block table descriptors */
/* The number of bits used per block in the bbt on the device */
#define NAND_BBT_NRBITS_MSK 0x0000000F
#define NAND_BBT_1BIT 0x00000001
#define NAND_BBT_2BIT 0x00000002
#define NAND_BBT_4BIT 0x00000004
#define NAND_BBT_8BIT 0x00000008
/* The bad block table is in the last good block of the device */
#define NAND_BBT_LASTBLOCK 0x00000010
/* The bbt is at the given page, else we must scan for the bbt */
#define NAND_BBT_ABSPAGE 0x00000020
/* bbt is stored per chip on multichip devices */
#define NAND_BBT_PERCHIP 0x00000080
/* bbt has a version counter at offset veroffs */
#define NAND_BBT_VERSION 0x00000100
/* Create a bbt if none exists */
#define NAND_BBT_CREATE 0x00000200
/*
* Create an empty BBT with no vendor information. Vendor's information may be
* unavailable, for example, if the NAND controller has a different data and OOB
* layout or if this information is already purged. Must be used in conjunction
* with NAND_BBT_CREATE.
*/
#define NAND_BBT_CREATE_EMPTY 0x00000400
/* Write bbt if neccecary */
#define NAND_BBT_WRITE 0x00002000
/* Read and write back block contents when writing bbt */
#define NAND_BBT_SAVECONTENT 0x00004000
/*
* Use a flash based bad block table. By default, OOB identifier is saved in
* OOB area. This option is passed to the default bad block table function.
*/
#define NAND_BBT_USE_FLASH 0x00020000
/*
* Do not store flash based bad block table marker in the OOB area; store it
* in-band.
*/
#define NAND_BBT_NO_OOB 0x00040000
/*
* Do not write new bad block markers to OOB; useful, e.g., when ECC covers
* entire spare area. Must be used with NAND_BBT_USE_FLASH.
*/
#define NAND_BBT_NO_OOB_BBM 0x00080000
/*
* Flag set by nand_create_default_bbt_descr(), marking that the nand_bbt_descr
* was allocated dynamicaly and must be freed in nand_cleanup(). Has no meaning
* in nand_chip.bbt_options.
*/
#define NAND_BBT_DYNAMICSTRUCT 0x80000000
/* The maximum number of blocks to scan for a bbt */
#define NAND_BBT_SCAN_MAXBLOCKS 4
/*
* Bad block scanning errors
*/
#define ONENAND_BBT_READ_ERROR 1
#define ONENAND_BBT_READ_ECC_ERROR 2
#define ONENAND_BBT_READ_FATAL_ERROR 4
/**
* struct bbm_info - [GENERIC] Bad Block Table data structure
* @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
* @options: options for this descriptor
* @bbt: [INTERN] bad block table pointer
* @isbad_bbt: function to determine if a block is bad
* @badblock_pattern: [REPLACEABLE] bad block scan pattern used for
* initial bad block scan
* @priv: [OPTIONAL] pointer to private bbm date
*/
struct bbm_info {
int bbt_erase_shift;
int options;
uint8_t *bbt;
int (*isbad_bbt)(struct mtd_info *mtd, loff_t ofs, int allowbbt);
/* TODO Add more NAND specific fileds */
struct nand_bbt_descr *badblock_pattern;
void *priv;
};
/* OneNAND BBT interface */
extern int onenand_default_bbt(struct mtd_info *mtd);
#endif /* __LINUX_MTD_BBM_H */
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| bbm.h | File | 4.71 KB | 0644 |
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| blktrans.h | File | 2.62 KB | 0644 |
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| cfi.h | File | 9.88 KB | 0644 |
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| cfi_endian.h | File | 1.48 KB | 0644 |
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| concat.h | File | 493 B | 0644 |
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| doc2000.h | File | 5.38 KB | 0644 |
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| flashchip.h | File | 2.42 KB | 0644 |
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| ftl.h | File | 2.49 KB | 0644 |
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| gen_probe.h | File | 615 B | 0644 |
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| hyperbus.h | File | 2.87 KB | 0644 |
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| inftl.h | File | 1.56 KB | 0644 |
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| jedec.h | File | 1.86 KB | 0644 |
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| latch-addr-flash.h | File | 716 B | 0644 |
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| lpc32xx_mlc.h | File | 385 B | 0644 |
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| lpc32xx_slc.h | File | 385 B | 0644 |
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| map.h | File | 12.71 KB | 0644 |
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| mtd.h | File | 22.05 KB | 0644 |
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| mtdram.h | File | 257 B | 0644 |
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| nand-ecc-sw-bch.h | File | 2.07 KB | 0644 |
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| nand-ecc-sw-hamming.h | File | 2.65 KB | 0644 |
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| nand-gpio.h | File | 330 B | 0644 |
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| nand.h | File | 29.57 KB | 0644 |
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| ndfc.h | File | 2.02 KB | 0644 |
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| nftl.h | File | 1.69 KB | 0644 |
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| onenand.h | File | 7.79 KB | 0644 |
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| onenand_regs.h | File | 7.05 KB | 0644 |
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| onfi.h | File | 4.85 KB | 0644 |
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| partitions.h | File | 3.85 KB | 0644 |
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| pfow.h | File | 4.38 KB | 0644 |
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| physmap.h | File | 808 B | 0644 |
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| pismo.h | File | 271 B | 0644 |
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| plat-ram.h | File | 668 B | 0644 |
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| platnand.h | File | 2.49 KB | 0644 |
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| qinfo.h | File | 2.47 KB | 0644 |
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| rawnand.h | File | 50.97 KB | 0644 |
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| sh_flctl.h | File | 5.79 KB | 0644 |
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| sharpsl.h | File | 485 B | 0644 |
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| spear_smi.h | File | 1.67 KB | 0644 |
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| spi-nor.h | File | 16.84 KB | 0644 |
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| spinand.h | File | 15.84 KB | 0644 |
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| super.h | File | 578 B | 0644 |
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| ubi.h | File | 9.68 KB | 0644 |
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| xip.h | File | 2.5 KB | 0644 |
|