1 files changed, 49 insertions, 0 deletions
diff --git a/cmd/conitrace.c b/cmd/conitrace.c
new file mode 100644
index 00000000000..6cc113328eb
--- /dev/null
+++ b/cmd/conitrace.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * The 'conitrace' command prints the codes received from the console input as
+ * hexadecimal numbers.
+ *
+ * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
+ */
+#include <command.h>
+#include <linux/delay.h>
+
+static int do_conitrace(struct cmd_tbl *cmdtp, int flag, int argc,
+			char *const argv[])
+{
+	bool first = true;
+
+	printf("Waiting for your input\n");
+	printf("To terminate type 'x'\n");
+
+	/* Empty input buffer */
+	while (tstc())
+		getchar();
+
+	for (;;) {
+		int c = getchar();
+
+		if (first && (c == 'x' || c == 'X'))
+			break;
+
+		printf("%02x ", c);
+		first = false;
+
+		/* 10 ms delay - serves to detect separate keystrokes */
+		udelay(10000);
+		if (!tstc()) {
+			printf("\n");
+			first = true;
+		}
+	}
+
+	return CMD_RET_SUCCESS;
+}
+
+U_BOOT_LONGHELP(conitrace, "");
+
+U_BOOT_CMD_COMPLETE(
+	conitrace, 2, 0, do_conitrace,
+	"trace console input",
+	conitrace_help_text, NULL
+);