xref: /openbmc/u-boot/tools/atmel_pmecc_params.c (revision e91610da)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2014 Andreas Bießmann <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 
18 static 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 
24 int 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