2  * This file provides ECC correction for more than 1 bit per block of data,
36  * @eccmask:   XOR ecc mask, allows erased pages to be decoded as valid
45  * nand_bch_calculate_ecc - [NAND Interface] Calculate ECC for data block
48  * @code:	output buffer with ECC
54 	struct nand_bch_control *nbc = chip->ecc.priv;  in nand_bch_calculate_ecc()
57 	memset(code, 0, chip->ecc.bytes);  in nand_bch_calculate_ecc()
58 	encode_bch(nbc->bch, buf, chip->ecc.size, code);  in nand_bch_calculate_ecc()
61 	for (i = 0; i < chip->ecc.bytes; i++)  in nand_bch_calculate_ecc()
72  * @read_ecc:	ECC from the chip
73  * @calc_ecc:	the ECC calculated from raw data
81 	struct nand_bch_control *nbc = chip->ecc.priv;  in nand_bch_correct_data()
85 	count = decode_bch(nbc->bch, NULL, chip->ecc.size, read_ecc, calc_ecc,  in nand_bch_correct_data()
89 			if (errloc[i] < (chip->ecc.size*8))  in nand_bch_correct_data()
92 			/* else error in ecc, no action needed */  in nand_bch_correct_data()
98 		pr_err("ecc unrecoverable error\n");  in nand_bch_correct_data()
127 	unsigned int eccsize = nand->ecc.size;  in nand_bch_init()
128 	unsigned int eccbytes = nand->ecc.bytes;  in nand_bch_init()
129 	unsigned int eccstrength = nand->ecc.strength;  in nand_bch_init()
133 		nand->ecc.bytes = eccbytes;  in nand_bch_init()
137 		pr_warn("ecc parameters not supplied\n");  in nand_bch_init()
174 	 * ecc->steps and ecc->total might be used by mtd->ooblayout->ecc(),  in nand_bch_init()
181 	nand->ecc.steps = eccsteps;  in nand_bch_init()
182 	nand->ecc.total = eccsteps * eccbytes;  in nand_bch_init()
184 		pr_warn("invalid ecc layout\n");  in nand_bch_init()
193 	 * compute and store the inverted ecc of an erased ecc block  in nand_bch_init()
208 		nand->ecc.strength = (eccbytes * 8) / fls(8 * eccsize);  in nand_bch_init()
218  * nand_bch_free - [NAND Interface] Release NAND BCH ECC resources
234 MODULE_DESCRIPTION("NAND software BCH ECC support");