text: /*
   * (C) Copyright 2010 DENX Software Engineering,
   * Anatolij Gustschin, agust@denx.de.
   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  /*
   * Co-Processor communication POST
   */
  #include <common.h>
  #include <post.h>
  #include <serial.h>
  
  /*
   * Actually the termination sequence of the coprocessor
   * commands is "\r\n" (CR LF), but here we use a side effect of
   * the putc() routine of the serial driver which checks for LF
   * and sends CR before sending LF. Therefore the termination
   * sequence in the command below is only "\n".
   * "alive" string is the coprocessor response for ping command
   * and not a command, therefore it is terminated with "\r\n".
   */
  char alive[] = "$AL;38\r\n";
  char ping[] = "$PI;2C\n";
  
  int coprocessor_post_test(int flags)
  {
  	struct stdio_dev *cop_port;
  	int ret;
  	char buf[10];
  
  	/* Test IO Coprocessor communication */
  	cop_port = open_port(4, CONFIG_SYS_PDM360NG_COPROC_BAUDRATE);
  	if (!cop_port)
  		return -1;
  
  	write_port(cop_port, ping);
  	udelay(CONFIG_SYS_PDM360NG_COPROC_READ_DELAY);
  
  	memset(buf, 0, sizeof(buf));
  	ret = read_port(cop_port, buf, sizeof(buf));
  	close_port(4);
  	if (ret <= 0) {
  		post_log("Error: Can't read IO Coprocessor port.\n");
  		return -1;
  	}
  
  	if (strcmp(buf, alive)) {
  		post_log("Error: IO-Cop. resp.: %s\n", buf);
  		return -1;
  	}
  
  	/* Test WD Coprocessor communication */
  	cop_port = open_port(1, CONFIG_SYS_PDM360NG_COPROC_BAUDRATE);
  	if (!cop_port) {
  		post_log("Error: Can't open WD Coprocessor port.\n");
  		return -1;
  	}
  
  	write_port(cop_port, ping);
  	udelay(CONFIG_SYS_PDM360NG_COPROC_READ_DELAY);
  
  	memset(buf, 0, sizeof(buf));
  	ret = read_port(cop_port, buf, sizeof(buf));
  	close_port(1);
  	if (ret <= 0) {
  		post_log("Error: Can't read WD Coprocessor port.\n");
  		return -1;
  	}
  
  	if (strcmp(buf, alive)) {
  		post_log("Error: WD-Cop. resp.: %s\n", buf);
  		return -1;
  	}
  
  	return 0;
  }
  