tools/atmel_pmecc_params.c

   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 }