1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2014 Andreas Bießmann <andreas@biessmann.org>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun /*
8*4882a593Smuzhiyun * This is a host tool for generating an appropriate string out of board
9*4882a593Smuzhiyun * configuration. The string is required for correct generation of PMECC
10*4882a593Smuzhiyun * header which in turn is required for NAND flash booting of Atmel AT91 style
11*4882a593Smuzhiyun * hardware.
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun * See doc/README.atmel_pmecc for more information.
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <config.h>
17*4882a593Smuzhiyun #include <stdlib.h>
18*4882a593Smuzhiyun
pmecc_get_ecc_bytes(int cap,int sector_size)19*4882a593Smuzhiyun static int pmecc_get_ecc_bytes(int cap, int sector_size)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun int m = 12 + sector_size / 512;
22*4882a593Smuzhiyun return (m * cap + 7) / 8;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
main(int argc,char * argv[])25*4882a593Smuzhiyun int main(int argc, char *argv[])
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun unsigned int use_pmecc = 0;
28*4882a593Smuzhiyun unsigned int sector_per_page;
29*4882a593Smuzhiyun unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
30*4882a593Smuzhiyun unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
31*4882a593Smuzhiyun unsigned int ecc_bits = CONFIG_PMECC_CAP;
32*4882a593Smuzhiyun unsigned int ecc_offset;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #ifdef CONFIG_ATMEL_NAND_HW_PMECC
35*4882a593Smuzhiyun use_pmecc = 1;
36*4882a593Smuzhiyun #endif
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
39*4882a593Smuzhiyun ecc_offset = oob_size -
40*4882a593Smuzhiyun pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun printf("usePmecc=%d,", use_pmecc);
43*4882a593Smuzhiyun printf("sectorPerPage=%d,", sector_per_page);
44*4882a593Smuzhiyun printf("sectorSize=%d,", sector_size);
45*4882a593Smuzhiyun printf("spareSize=%d,", oob_size);
46*4882a593Smuzhiyun printf("eccBits=%d,", ecc_bits);
47*4882a593Smuzhiyun printf("eccOffset=%d", ecc_offset);
48*4882a593Smuzhiyun printf("\n");
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun exit(EXIT_SUCCESS);
51*4882a593Smuzhiyun }
52