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/*
* (C) Copyright 2010 DENX Software Engineering,
* Anatolij Gustschin, agust@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* 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;
}
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