LXR uboot/post/board/pdm360ng/coproc

   1/*
   2 * (C) Copyright 2010 DENX Software Engineering,
   3 * Anatolij Gustschin, agust@denx.de.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8/*
   9 * Co-Processor communication POST
  10 */
  11#include <common.h>
  12#include <post.h>
  13#include <serial.h>
  14
  15/*
  16 * Actually the termination sequence of the coprocessor
  17 * commands is "\r\n" (CR LF), but here we use a side effect of
  18 * the putc() routine of the serial driver which checks for LF
  19 * and sends CR before sending LF. Therefore the termination
  20 * sequence in the command below is only "\n".
  21 * "alive" string is the coprocessor response for ping command
  22 * and not a command, therefore it is terminated with "\r\n".
  23 */
  24char alive[] = "$AL;38\r\n";
  25char ping[] = "$PI;2C\n";
  26
  27int coprocessor_post_test(int flags)
  28{
  29        struct stdio_dev *cop_port;
  30        int ret;
  31        char buf[10];
  32
  33        /* Test IO Coprocessor communication */
  34        cop_port = open_port(4, CONFIG_SYS_PDM360NG_COPROC_BAUDRATE);
  35        if (!cop_port)
  36                return -1;
  37
  38        write_port(cop_port, ping);
  39        udelay(CONFIG_SYS_PDM360NG_COPROC_READ_DELAY);
  40
  41        memset(buf, 0, sizeof(buf));
  42        ret = read_port(cop_port, buf, sizeof(buf));
  43        close_port(4);
  44        if (ret <= 0) {
  45                post_log("Error: Can't read IO Coprocessor port.\n");
  46                return -1;
  47        }
  48
  49        if (strcmp(buf, alive)) {
  50                post_log("Error: IO-Cop. resp.: %s\n", buf);
  51                return -1;
  52        }
  53
  54        /* Test WD Coprocessor communication */
  55        cop_port = open_port(1, CONFIG_SYS_PDM360NG_COPROC_BAUDRATE);
  56        if (!cop_port) {
  57                post_log("Error: Can't open WD Coprocessor port.\n");
  58                return -1;
  59        }
  60
  61        write_port(cop_port, ping);
  62        udelay(CONFIG_SYS_PDM360NG_COPROC_READ_DELAY);
  63
  64        memset(buf, 0, sizeof(buf));
  65        ret = read_port(cop_port, buf, sizeof(buf));
  66        close_port(1);
  67        if (ret <= 0) {
  68                post_log("Error: Can't read WD Coprocessor port.\n");
  69                return -1;
  70        }
  71
  72        if (strcmp(buf, alive)) {
  73                post_log("Error: WD-Cop. resp.: %s\n", buf);
  74                return -1;
  75        }
  76
  77        return 0;
  78}
  79