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29fd7ceb3c
Adds coprocessor communication POST code Signed-off-by: Anatolij Gustschin <agust@denx.de>
98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/*
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* (C) Copyright 2010 DENX Software Engineering,
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* Anatolij Gustschin, agust@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Co-Processor communication POST
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*/
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#include <common.h>
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#include <post.h>
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#include <serial.h>
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#if defined(CONFIG_SERIAL_MULTI)
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/*
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* Actually the termination sequence of the coprocessor
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* commands is "\r\n" (CR LF), but here we use a side effect of
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* the putc() routine of the serial driver which checks for LF
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* and sends CR before sending LF. Therefore the termination
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* sequence in the command below is only "\n".
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* "alive" string is the coprocessor response for ping command
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* and not a command, therefore it is terminated with "\r\n".
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*/
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char alive[] = "$AL;38\r\n";
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char ping[] = "$PI;2C\n";
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int coprocessor_post_test(int flags)
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{
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struct stdio_dev *cop_port;
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int ret;
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char buf[10];
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/* Test IO Coprocessor communication */
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cop_port = open_port(4, CONFIG_SYS_PDM360NG_COPROC_BAUDRATE);
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if (!cop_port)
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return -1;
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write_port(cop_port, ping);
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udelay(CONFIG_SYS_PDM360NG_COPROC_READ_DELAY);
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memset(buf, 0, sizeof(buf));
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ret = read_port(cop_port, buf, sizeof(buf));
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close_port(4);
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if (ret <= 0) {
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post_log("Error: Can't read IO Coprocessor port.\n");
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return -1;
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}
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if (strcmp(buf, alive)) {
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post_log("Error: IO-Cop. resp.: %s\n", buf);
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return -1;
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}
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/* Test WD Coprocessor communication */
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cop_port = open_port(1, CONFIG_SYS_PDM360NG_COPROC_BAUDRATE);
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if (!cop_port) {
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post_log("Error: Can't open WD Coprocessor port.\n");
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return -1;
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}
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write_port(cop_port, ping);
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udelay(CONFIG_SYS_PDM360NG_COPROC_READ_DELAY);
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memset(buf, 0, sizeof(buf));
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ret = read_port(cop_port, buf, sizeof(buf));
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close_port(1);
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if (ret <= 0) {
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post_log("Error: Can't read WD Coprocessor port.\n");
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return -1;
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}
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if (strcmp(buf, alive)) {
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post_log("Error: WD-Cop. resp.: %s\n", buf);
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return -1;
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}
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return 0;
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}
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#endif /* CONFIG_SERIAL_MULTI */
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