diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/bch.h | 79 | ||||
-rw-r--r-- | include/linux/mtd/blktrans.h | 3 | ||||
-rw-r--r-- | include/linux/mtd/cfi.h | 1 | ||||
-rw-r--r-- | include/linux/mtd/latch-addr-flash.h | 29 | ||||
-rw-r--r-- | include/linux/mtd/nand.h | 3 | ||||
-rw-r--r-- | include/linux/mtd/nand_bch.h | 72 | ||||
-rw-r--r-- | include/linux/mtd/onenand.h | 1 |
7 files changed, 188 insertions, 0 deletions
diff --git a/include/linux/bch.h b/include/linux/bch.h new file mode 100644 index 0000000..295b4ef --- /dev/null +++ b/include/linux/bch.h @@ -0,0 +1,79 @@ +/* + * Generic binary BCH encoding/decoding library + * + * 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 program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 51 + * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Copyright © 2011 Parrot S.A. + * + * Author: Ivan Djelic <ivan.djelic@parrot.com> + * + * Description: + * + * This library provides runtime configurable encoding/decoding of binary + * Bose-Chaudhuri-Hocquenghem (BCH) codes. +*/ +#ifndef _BCH_H +#define _BCH_H + +#include <linux/types.h> + +/** + * struct bch_control - BCH control structure + * @m: Galois field order + * @n: maximum codeword size in bits (= 2^m-1) + * @t: error correction capability in bits + * @ecc_bits: ecc exact size in bits, i.e. generator polynomial degree (<=m*t) + * @ecc_bytes: ecc max size (m*t bits) in bytes + * @a_pow_tab: Galois field GF(2^m) exponentiation lookup table + * @a_log_tab: Galois field GF(2^m) log lookup table + * @mod8_tab: remainder generator polynomial lookup tables + * @ecc_buf: ecc parity words buffer + * @ecc_buf2: ecc parity words buffer + * @xi_tab: GF(2^m) base for solving degree 2 polynomial roots + * @syn: syndrome buffer + * @cache: log-based polynomial representation buffer + * @elp: error locator polynomial + * @poly_2t: temporary polynomials of degree 2t + */ +struct bch_control { + unsigned int m; + unsigned int n; + unsigned int t; + unsigned int ecc_bits; + unsigned int ecc_bytes; +/* private: */ + uint16_t *a_pow_tab; + uint16_t *a_log_tab; + uint32_t *mod8_tab; + uint32_t *ecc_buf; + uint32_t *ecc_buf2; + unsigned int *xi_tab; + unsigned int *syn; + int *cache; + struct gf_poly *elp; + struct gf_poly *poly_2t[4]; +}; + +struct bch_control *init_bch(int m, int t, unsigned int prim_poly); + +void free_bch(struct bch_control *bch); + +void encode_bch(struct bch_control *bch, const uint8_t *data, + unsigned int len, uint8_t *ecc); + +int decode_bch(struct bch_control *bch, const uint8_t *data, unsigned int len, + const uint8_t *recv_ecc, const uint8_t *calc_ecc, + const unsigned int *syn, unsigned int *errloc); + +#endif /* _BCH_H */ diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h index 26529eb..1bbd9f2 100644 --- a/include/linux/mtd/blktrans.h +++ b/include/linux/mtd/blktrans.h @@ -36,6 +36,7 @@ struct mtd_blktrans_dev { struct mtd_info *mtd; struct mutex lock; int devnum; + bool bg_stop; unsigned long size; int readonly; int open; @@ -62,6 +63,7 @@ struct mtd_blktrans_ops { unsigned long block, char *buffer); int (*discard)(struct mtd_blktrans_dev *dev, unsigned long block, unsigned nr_blocks); + void (*background)(struct mtd_blktrans_dev *dev); /* Block layer ioctls */ int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo); @@ -85,6 +87,7 @@ extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr); extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr); extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev); +extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev); #endif /* __MTD_TRANS_H__ */ diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h index a9baee6..0d823f2 100644 --- a/include/linux/mtd/cfi.h +++ b/include/linux/mtd/cfi.h @@ -535,6 +535,7 @@ struct cfi_fixup { #define CFI_MFR_CONTINUATION 0x007F #define CFI_MFR_AMD 0x0001 +#define CFI_MFR_AMIC 0x0037 #define CFI_MFR_ATMEL 0x001F #define CFI_MFR_EON 0x001C #define CFI_MFR_FUJITSU 0x0004 diff --git a/include/linux/mtd/latch-addr-flash.h b/include/linux/mtd/latch-addr-flash.h new file mode 100644 index 0000000..e94b8e1 --- /dev/null +++ b/include/linux/mtd/latch-addr-flash.h @@ -0,0 +1,29 @@ +/* + * Interface for NOR flash driver whose high address lines are latched + * + * Copyright © 2008 MontaVista Software, Inc. <source@mvista.com> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ +#ifndef __LATCH_ADDR_FLASH__ +#define __LATCH_ADDR_FLASH__ + +struct map_info; +struct mtd_partition; + +struct latch_addr_flash_data { + unsigned int width; + unsigned int size; + + int (*init)(void *data, int cs); + void (*done)(void *data); + void (*set_window)(unsigned long offset, void *data); + void *data; + + unsigned int nr_parts; + struct mtd_partition *parts; +}; + +#endif diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 1f489b2..ae67ef5 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -140,6 +140,7 @@ typedef enum { NAND_ECC_HW, NAND_ECC_HW_SYNDROME, NAND_ECC_HW_OOB_FIRST, + NAND_ECC_SOFT_BCH, } nand_ecc_modes_t; /* @@ -339,6 +340,7 @@ struct nand_hw_control { * @prepad: padding information for syndrome based ecc generators * @postpad: padding information for syndrome based ecc generators * @layout: ECC layout control struct pointer + * @priv: pointer to private ecc control data * @hwctl: function to control hardware ecc generator. Must only * be provided if an hardware ECC is available * @calculate: function for ecc calculation or readback from ecc hardware @@ -362,6 +364,7 @@ struct nand_ecc_ctrl { int prepad; int postpad; struct nand_ecclayout *layout; + void *priv; void (*hwctl)(struct mtd_info *mtd, int mode); int (*calculate)(struct mtd_info *mtd, const uint8_t *dat, uint8_t *ecc_code); diff --git a/include/linux/mtd/nand_bch.h b/include/linux/mtd/nand_bch.h new file mode 100644 index 0000000..74acf53 --- /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_MTD_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__ */ diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h index ae418e4..52b6f18 100644 --- a/include/linux/mtd/onenand.h +++ b/include/linux/mtd/onenand.h @@ -198,6 +198,7 @@ struct onenand_chip { #define ONENAND_SKIP_UNLOCK_CHECK (0x0100) #define ONENAND_PAGEBUF_ALLOC (0x1000) #define ONENAND_OOBBUF_ALLOC (0x2000) +#define ONENAND_SKIP_INITIAL_UNLOCKING (0x4000) #define ONENAND_IS_4KB_PAGE(this) \ (this->options & ONENAND_HAS_4KB_PAGE) |