mpc5121: pdm360ng: add coprocessor POST

Adds coprocessor communication POST code

Signed-off-by: Anatolij Gustschin <agust@denx.de>

2 files changed, 126 insertions, 0 deletions

diff --git a/post/board/pdm360ng/Makefile b/post/board/pdm360ng/Makefile
new file mode 100644
index 0000000..d1538f6
--- /dev/null
+++ b/post/board/pdm360ng/Makefile
@@ -0,0 +1,29 @@
+#
+# (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
+#
+include $(OBJTREE)/include/autoconf.mk
+
+LIB	= libpostpdm360ng.a
+
+COBJS-$(CONFIG_HAS_POST)	+= coproc_com.o
+
+include $(TOPDIR)/post/rules.mk
diff --git a/post/board/pdm360ng/coproc_com.c b/post/board/pdm360ng/coproc_com.c
new file mode 100644
index 0000000..0755352
--- /dev/null
+++ b/post/board/pdm360ng/coproc_com.c
@@ -0,0 +1,97 @@
+/*
+ * (C) Copyright 2010 DENX Software Engineering,
+ * Anatolij Gustschin, agust@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Co-Processor communication POST
+ */
+#include <common.h>
+#include <post.h>
+#include <serial.h>
+
+#if defined(CONFIG_SERIAL_MULTI)
+
+/*
+ * Actually the termination sequence of the coprocessor
+ * commands is "\r\n" (CR LF), but here we use a side effect of
+ * the putc() routine of the serial driver which checks for LF
+ * and sends CR before sending LF. Therefore the termination
+ * sequence in the command below is only "\n".
+ * "alive" string is the coprocessor response for ping command
+ * and not a command, therefore it is terminated with "\r\n".
+ */
+char alive[] = "$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;
+}
+#endif	/* CONFIG_SERIAL_MULTI */