1 files changed, 70 insertions, 1 deletions
diff --git a/chip/npcx/i2c-npcx9.c b/chip/npcx/i2c-npcx9.c
index b1b16a3198..427b9cae9f 120000..100644
--- a/chip/npcx/i2c-npcx9.c
+++ b/chip/npcx/i2c-npcx9.c
@@ -1 +1,70 @@
-i2c-npcx7.c
-\ No newline at end of file
+/* Copyright 2017 The ChromiumOS Authors
+ * 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 "common.h"
+#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;
+
+	if (port <= NPCX_I2C_PORT3_0)
+		return port;
+#ifndef NPCX_PSL_MODE_SUPPORT
+	else if (port == NPCX_I2C_PORT4_0)
+		return 4;
+#endif
+	else /* If port >= NPCX_I2C_PORT4_1 */
+		return 4 + ((port - NPCX_I2C_PORT4_1 + 1) / 2);
+}
+
+void i2c_select_port(int port)
+{
+	/* Only I2C 4/5/6 have multiple ports in series npcx7 */
+	if (port <= NPCX_I2C_PORT3_0 || port >= NPCX_I2C_PORT7_0)
+		return;
+	/* Select I2C ports for the same controller */
+	else if (port <= NPCX_I2C_PORT4_1) {
+		UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB4SEL,
+			   (port == NPCX_I2C_PORT4_1));
+	} else if (port <= NPCX_I2C_PORT5_1) {
+		UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB5SEL,
+			   (port == NPCX_I2C_PORT5_1));
+	} else {
+		UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB6SEL,
+			   (port == NPCX_I2C_PORT6_1));
+	}
+}
+
+int i2c_is_raw_mode(int port)
+{
+	int group, bit;
+
+	if (port == NPCX_I2C_PORT4_1 || port == NPCX_I2C_PORT5_1 ||
+	    port == NPCX_I2C_PORT6_1) {
+		group = 6;
+		bit = 7 - (port - NPCX_I2C_PORT4_1) / 2;
+	} else {
+		group = 2;
+		if (port <= NPCX_I2C_PORT3_0)
+			bit = 2 * port;
+		else
+			bit = I2C_PORT_COUNT - port;
+	}
+
+	if (IS_BIT_SET(NPCX_DEVALT(group), bit))
+		return 0;
+	else
+		return 1;
+}