1 files changed, 47 insertions, 0 deletions
diff --git a/chip/npcx/i2c-npcx5.c b/chip/npcx/i2c-npcx5.c
new file mode 100644
index 0000000000..6b78fd53f9
--- /dev/null
+++ b/chip/npcx/i2c-npcx5.c
@@ -0,0 +1,47 @@
+/* Copyright 2017 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.
+ */
+
+/* I2C module driver depends on chip series for Chrome EC */
+
+#include "i2c.h"
+#include "i2c_chip.h"
+#include "registers.h"
+#include "util.h"
+
+/*****************************************************************************/
+/* IC specific low-level driver depends on chip series */
+
+int i2c_port_to_controller(int port)
+{
+	if (port < 0 || port >= I2C_PORT_COUNT)
+		return -1;
+
+	return (port == NPCX_I2C_PORT0_0) ? 0 : port - 1;
+}
+
+void i2c_select_port(int port)
+{
+	/*
+	 * I2C0_1 uses port 1 of controller 0. All other I2C pin sets
+	 * use port 0.
+	 */
+	if (port > NPCX_I2C_PORT0_1)
+		return;
+
+	/* Select IO pins for multi-ports I2C controllers */
+	UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB0SEL,
+			(port == NPCX_I2C_PORT0_1));
+}
+
+int i2c_is_raw_mode(int port)
+{
+	int bit = (port > NPCX_I2C_PORT0_1) ? ((port - 1) * 2) : port;
+
+	if (IS_BIT_SET(NPCX_DEVALT(2), bit))
+		return 0;
+	else
+		return 1;
+}
+