1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2014 Andreas Bie��mann <andreas@biessmann.org>
4 */
5
6/*
7 * This is a host tool for generating an appropriate string out of board
8 * configuration. The string is required for correct generation of PMECC
9 * header which in turn is required for NAND flash booting of Atmel AT91 style
10 * hardware.
11 *
12 * See doc/README.atmel_pmecc for more information.
13 */
14
15#include <config.h>
16#include <stdlib.h>
17
18static int pmecc_get_ecc_bytes(int cap, int sector_size)
19{
20	int m = 12 + sector_size / 512;
21	return (m * cap + 7) / 8;
22}
23
24int main(int argc, char *argv[])
25{
26	unsigned int use_pmecc = 0;
27	unsigned int sector_per_page;
28	unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
29	unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
30	unsigned int ecc_bits = CONFIG_PMECC_CAP;
31	unsigned int ecc_offset;
32
33#ifdef CONFIG_ATMEL_NAND_HW_PMECC
34	use_pmecc = 1;
35#endif
36
37	sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
38	ecc_offset = oob_size -
39		pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
40
41	printf("usePmecc=%d,", use_pmecc);
42	printf("sectorPerPage=%d,", sector_per_page);
43	printf("sectorSize=%d,", sector_size);
44	printf("spareSize=%d,", oob_size);
45	printf("eccBits=%d,", ecc_bits);
46	printf("eccOffset=%d", ecc_offset);
47	printf("\n");
48
49	exit(EXIT_SUCCESS);
50}
51