2 * (C) Copyright 2014 Andreas Bießmann <andreas@biessmann.org>
4 * SPDX-License-Identifier: GPL-2.0+
8 * This is a host tool for generating an appropriate string out of board
9 * configuration. The string is required for correct generation of PMECC
10 * header which in turn is required for NAND flash booting of Atmel AT91 style
13 * See doc/README.atmel_pmecc for more information.
19 static int pmecc_get_ecc_bytes(int cap
, int sector_size
)
21 int m
= 12 + sector_size
/ 512;
22 return (m
* cap
+ 7) / 8;
25 int main(int argc
, char *argv
[])
27 unsigned int use_pmecc
= 0;
28 unsigned int sector_per_page
;
29 unsigned int sector_size
= CONFIG_PMECC_SECTOR_SIZE
;
30 unsigned int oob_size
= CONFIG_SYS_NAND_OOBSIZE
;
31 unsigned int ecc_bits
= CONFIG_PMECC_CAP
;
32 unsigned int ecc_offset
;
34 #ifdef CONFIG_ATMEL_NAND_HW_PMECC
38 sector_per_page
= CONFIG_SYS_NAND_PAGE_SIZE
/ CONFIG_PMECC_SECTOR_SIZE
;
39 ecc_offset
= oob_size
-
40 pmecc_get_ecc_bytes(ecc_bits
, sector_size
) * sector_per_page
;
42 printf("usePmecc=%d,", use_pmecc
);
43 printf("sectorPerPage=%d,", sector_per_page
);
44 printf("sectorSize=%d,", sector_size
);
45 printf("spareSize=%d,", oob_size
);
46 printf("eccBits=%d,", ecc_bits
);
47 printf("eccOffset=%d", ecc_offset
);