1 /* $NetBSD: hamming.h,v 1.1 2011/02/26 18:07:31 ahoka Exp $ */ 2 3 /* 4 * Copyright (c) 2008, Atmel Corporation 5 * 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the disclaimer below. 13 * 14 * Atmel's name may not be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef HAMMING_H 30 #define HAMMING_H 31 32 #include "nand.h" 33 34 /*- 35 * These are the possible errors when trying to verify a block of data encoded 36 * using a Hamming code: 37 * 38 * - HAMMING_ERROR_SINGLEBIT 39 * - HAMMING_ERROR_ECC 40 * - HAMMING_ERROR_MULTIPLEBITS 41 */ 42 43 /* A single bit was incorrect but has been recovered. */ 44 #define HAMMING_ERROR_SINGLEBIT NAND_ECC_CORRECTED 45 46 /* The original code has been corrupted. */ 47 #define HAMMING_ERROR_ECC NAND_ECC_INVALID 48 49 /* Multiple bits are incorrect in the data and they cannot be corrected. */ 50 #define HAMMING_ERROR_MULTIPLEBITS NAND_ECC_TWOBIT 51 52 uint8_t hamming_correct_256(uint8_t *, const uint8_t *, const uint8_t *); 53 void hamming_compute_256(const uint8_t *data, uint8_t *code); 54 55 #endif /* HAMMING_H */ 56 57