1 /*
2  *  Copyright (C) 2000-2010 Steven J. Hill <sjhill@realitydiluted.com>
3  *			    David Woodhouse <dwmw2@infradead.org>
4  *			    Thomas Gleixner <tglx@linutronix.de>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  *
10  * This file is the header for the ECC algorithm.
11  */
12 
13 #ifndef __MTD_NAND_ECC_H__
14 #define __MTD_NAND_ECC_H__
15 
16 struct mtd_info;
17 
18 /*
19  * Calculate 3 byte ECC code for eccsize byte block
20  */
21 void __nand_calculate_ecc(const u_char *dat, unsigned int eccsize,
22 				u_char *ecc_code);
23 
24 /*
25  * Calculate 3 byte ECC code for 256/512 byte block
26  */
27 int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code);
28 
29 /*
30  * Detect and correct a 1 bit error for eccsize byte block
31  */
32 int __nand_correct_data(u_char *dat, u_char *read_ecc, u_char *calc_ecc,
33 			unsigned int eccsize);
34 
35 /*
36  * Detect and correct a 1 bit error for 256/512 byte block
37  */
38 int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
39 
40 #endif /* __MTD_NAND_ECC_H__ */
41