/*
   * (C) Copyright 2014 Andreas Bießmann <andreas@biessmann.org>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  /*
   * This is a host tool for generating an appropriate string out of board
   * configuration. The string is required for correct generation of PMECC
   * header which in turn is required for NAND flash booting of Atmel AT91 style
   * hardware.
   *
   * See doc/README.atmel_pmecc for more information.
   */
  
  #include <config.h>
  #include <stdlib.h>
  
  static int pmecc_get_ecc_bytes(int cap, int sector_size)
  {
  	int m = 12 + sector_size / 512;
  	return (m * cap + 7) / 8;
  }
  
  int main(int argc, char *argv[])
  {
  	unsigned int use_pmecc = 0;
  	unsigned int sector_per_page;
  	unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
  	unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
  	unsigned int ecc_bits = CONFIG_PMECC_CAP;
  	unsigned int ecc_offset;
  
  #ifdef CONFIG_ATMEL_NAND_HW_PMECC
  	use_pmecc = 1;
  #endif
  
  	sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
  	ecc_offset = oob_size -
  		pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
  
  	printf("usePmecc=%d,", use_pmecc);
  	printf("sectorPerPage=%d,", sector_per_page);
  	printf("sectorSize=%d,", sector_size);
  	printf("spareSize=%d,", oob_size);
  	printf("eccBits=%d,", ecc_bits);
  	printf("eccOffset=%d", ecc_offset);
  	printf("
  ");
  
  	exit(EXIT_SUCCESS);
  }