1 files changed, 86 insertions, 0 deletions
diff --git a/chip/host/uart.c b/chip/host/uart.c
new file mode 100644
index 0000000000..cbae79974b
--- /dev/null
+++ b/chip/host/uart.c
@@ -0,0 +1,86 @@
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* UART driver for emulator */
+
+#include <stdio.h>
+
+#include "board.h"
+#include "config.h"
+#include "task.h"
+#include "uart.h"
+
+static int stopped;
+static int int_disabled;
+static int init_done;
+
+static void trigger_interrupt(void)
+{
+	if (!int_disabled)
+		uart_process();
+}
+
+int uart_init_done(void)
+{
+	return init_done;
+}
+
+void uart_tx_start(void)
+{
+	stopped = 0;
+	trigger_interrupt();
+}
+
+void uart_tx_stop(void)
+{
+	stopped = 1;
+}
+
+int uart_tx_stopped(void)
+{
+	return stopped;
+}
+
+void uart_tx_flush(void)
+{
+	/* Nothing */
+}
+
+int uart_tx_ready(void)
+{
+	return 1;
+}
+
+int uart_rx_available(void)
+{
+	return 0;
+}
+
+void uart_write_char(char c)
+{
+	printf("%c", c);
+	fflush(stdout);
+}
+
+int uart_read_char(void)
+{
+	/* Should never be called for now */
+	return 0;
+}
+
+void uart_disable_interrupt(void)
+{
+	int_disabled = 1;
+}
+
+void uart_enable_interrupt(void)
+{
+	int_disabled = 0;
+}
+
+void uart_init(void)
+{
+	init_done = 1;
+}