diff options
Diffstat (limited to 'include/linux/mtd/nand-ecc-sw-hamming.h')
-rw-r--r-- | include/linux/mtd/nand-ecc-sw-hamming.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/include/linux/mtd/nand-ecc-sw-hamming.h b/include/linux/mtd/nand-ecc-sw-hamming.h new file mode 100644 index 000000000000..9f9073d86ff3 --- /dev/null +++ b/include/linux/mtd/nand-ecc-sw-hamming.h @@ -0,0 +1,91 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2000-2010 Steven J. Hill <sjhill@realitydiluted.com> + * David Woodhouse <dwmw2@infradead.org> + * Thomas Gleixner <tglx@linutronix.de> + * + * This file is the header for the NAND Hamming ECC implementation. + */ + +#ifndef __MTD_NAND_ECC_SW_HAMMING_H__ +#define __MTD_NAND_ECC_SW_HAMMING_H__ + +#include <linux/mtd/nand.h> + +/** + * struct nand_ecc_sw_hamming_conf - private software Hamming ECC engine structure + * @req_ctx: Save request context and tweak the original request to fit the + * engine needs + * @code_size: Number of bytes needed to store a code (one code per step) + * @nsteps: Number of steps + * @calc_buf: Buffer to use when calculating ECC bytes + * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip + * @sm_order: Smart Media special ordering + */ +struct nand_ecc_sw_hamming_conf { + struct nand_ecc_req_tweak_ctx req_ctx; + unsigned int code_size; + unsigned int nsteps; + u8 *calc_buf; + u8 *code_buf; + unsigned int sm_order; +}; + +#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING) + +int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand); +void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand); +int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size, + unsigned char *code, bool sm_order); +int nand_ecc_sw_hamming_calculate(struct nand_device *nand, + const unsigned char *buf, + unsigned char *code); +int ecc_sw_hamming_correct(unsigned char *buf, unsigned char *read_ecc, + unsigned char *calc_ecc, unsigned int step_size, + bool sm_order); +int nand_ecc_sw_hamming_correct(struct nand_device *nand, unsigned char *buf, + unsigned char *read_ecc, + unsigned char *calc_ecc); + +#else /* !CONFIG_MTD_NAND_ECC_SW_HAMMING */ + +static inline int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand) +{ + return -ENOTSUPP; +} + +static inline void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand) {} + +static inline int ecc_sw_hamming_calculate(const unsigned char *buf, + unsigned int step_size, + unsigned char *code, bool sm_order) +{ + return -ENOTSUPP; +} + +static inline int nand_ecc_sw_hamming_calculate(struct nand_device *nand, + const unsigned char *buf, + unsigned char *code) +{ + return -ENOTSUPP; +} + +static inline int ecc_sw_hamming_correct(unsigned char *buf, + unsigned char *read_ecc, + unsigned char *calc_ecc, + unsigned int step_size, bool sm_order) +{ + return -ENOTSUPP; +} + +static inline int nand_ecc_sw_hamming_correct(struct nand_device *nand, + unsigned char *buf, + unsigned char *read_ecc, + unsigned char *calc_ecc) +{ + return -ENOTSUPP; +} + +#endif /* CONFIG_MTD_NAND_ECC_SW_HAMMING */ + +#endif /* __MTD_NAND_ECC_SW_HAMMING_H__ */ |