mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-22 01:48:52 +09:00
![Wolfgang Denk](/assets/img/avatar_default.png)
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/*
|
|
* (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;
|
|
}
|