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author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-07-18 15:10:50 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-07-23 16:25:13 +0200 |
commit | 66891566ccf72c19c3c25182f98eda4dc2a8ad3e (patch) | |
tree | 354cfc51aaba34cb14ba5802d8a60cb60c2cc91c /include/linux/mtd/nand_bch.h | |
parent | 69f3d6c93b814c3464dea57538b90552de14caf4 (diff) | |
download | barebox-66891566ccf72c19c3c25182f98eda4dc2a8ad3e.tar.gz barebox-66891566ccf72c19c3c25182f98eda4dc2a8ad3e.tar.xz |
mtd: nand: update to v3.11-rc1
This updates the NAND stuff to Linux-3.11-rc1. It is synchronized
as best as we can get:
- locks removed
- The splitting in different files we had to better support different
features has been dropped. Instead this is now done mostly with the
use of __maybe_unused
Some barebox adjustments are forward ported, like:
- Allow partial page writes
- Optionally allow to erase bad blocks
- check for all_ff before writing a page
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/linux/mtd/nand_bch.h')
-rw-r--r-- | include/linux/mtd/nand_bch.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/mtd/nand_bch.h b/include/linux/mtd/nand_bch.h new file mode 100644 index 0000000000..61c4607fa8 --- /dev/null +++ b/include/linux/mtd/nand_bch.h @@ -0,0 +1,72 @@ +/* + * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This file is the header for the NAND BCH ECC implementation. + */ + +#ifndef __MTD_NAND_BCH_H__ +#define __MTD_NAND_BCH_H__ + +struct mtd_info; +struct nand_bch_control; + +#if defined(CONFIG_NAND_ECC_BCH) + +static inline int mtd_nand_has_bch(void) { return 1; } + +/* + * Calculate BCH ecc code + */ +int nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat, + u_char *ecc_code); + +/* + * Detect and correct bit errors + */ +int nand_bch_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, + u_char *calc_ecc); +/* + * Initialize BCH encoder/decoder + */ +struct nand_bch_control * +nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, + unsigned int eccbytes, struct nand_ecclayout **ecclayout); +/* + * Release BCH encoder/decoder resources + */ +void nand_bch_free(struct nand_bch_control *nbc); + +#else /* !CONFIG_MTD_NAND_ECC_BCH */ + +static inline int mtd_nand_has_bch(void) { return 0; } + +static inline int +nand_bch_calculate_ecc(struct mtd_info *mtd, const u_char *dat, + u_char *ecc_code) +{ + return -1; +} + +static inline int +nand_bch_correct_data(struct mtd_info *mtd, unsigned char *buf, + unsigned char *read_ecc, unsigned char *calc_ecc) +{ + return -1; +} + +static inline struct nand_bch_control * +nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, + unsigned int eccbytes, struct nand_ecclayout **ecclayout) +{ + return NULL; +} + +static inline void nand_bch_free(struct nand_bch_control *nbc) {} + +#endif /* CONFIG_MTD_NAND_ECC_BCH */ + +#endif /* __MTD_NAND_BCH_H__ */ |