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| author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-02-04 09:52:30 +0100 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-04-19 22:05:47 +0200 |
| commit | 75eb2cec251fda33c9bb716ecc372819abb9278a (patch) | |
| tree | 6adaf011cf01e43273cf1b70f82ed12812182fc5 /include/linux/mtd | |
| parent | c4f3ef2c6c219c3e58e0f5a9589a67685a75d787 (diff) | |
| download | blackbird-op-linux-75eb2cec251fda33c9bb716ecc372819abb9278a.tar.gz blackbird-op-linux-75eb2cec251fda33c9bb716ecc372819abb9278a.zip | |
mtd: add mtd_ooblayout_xxx() helper functions
In order to make the ecclayout definition completely dynamic we need to
rework the way the OOB layout are defined and iterated.
Create a few mtd_ooblayout_xxx() helpers to ease OOB bytes manipulation
and hide ecclayout internals to their users.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/mtd.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index ef9fea4fc400..117ca1ff581d 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -108,6 +108,21 @@ struct nand_ecclayout { struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES_LARGE]; }; +/** + * struct mtd_oob_region - oob region definition + * @offset: region offset + * @length: region length + * + * This structure describes a region of the OOB area, and is used + * to retrieve ECC or free bytes sections. + * Each section is defined by an offset within the OOB area and a + * length. + */ +struct mtd_oob_region { + u32 offset; + u32 length; +}; + struct module; /* only needed for owner field in mtd_info */ struct mtd_info { @@ -253,6 +268,24 @@ struct mtd_info { int usecount; }; +int mtd_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobecc); +int mtd_ooblayout_find_eccregion(struct mtd_info *mtd, int eccbyte, + int *section, + struct mtd_oob_region *oobregion); +int mtd_ooblayout_get_eccbytes(struct mtd_info *mtd, u8 *eccbuf, + const u8 *oobbuf, int start, int nbytes); +int mtd_ooblayout_set_eccbytes(struct mtd_info *mtd, const u8 *eccbuf, + u8 *oobbuf, int start, int nbytes); +int mtd_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobfree); +int mtd_ooblayout_get_databytes(struct mtd_info *mtd, u8 *databuf, + const u8 *oobbuf, int start, int nbytes); +int mtd_ooblayout_set_databytes(struct mtd_info *mtd, const u8 *databuf, + u8 *oobbuf, int start, int nbytes); +int mtd_ooblayout_count_freebytes(struct mtd_info *mtd); +int mtd_ooblayout_count_eccbytes(struct mtd_info *mtd); + static inline void mtd_set_of_node(struct mtd_info *mtd, struct device_node *np) { |
