ec_ec_comm_master: Functions for EC-EC communication master

This adds functions required for the master in EC-EC communication,
requesting base battery static and dynamic information, and charger
control.

BRANCH=none
BUG=b:65526215
TEST=Flash lux and wand, EC-EC communication works.

Change-Id: I7a46ee3f5848d22c2c9bea7870cbd7e74141cf3d
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/839201

1 files changed, 60 insertions, 0 deletions

diff --git a/include/ec_ec_comm_master.h b/include/ec_ec_comm_master.h
new file mode 100644
index 0000000000..8c04795103
--- /dev/null
+++ b/include/ec_ec_comm_master.h
@@ -0,0 +1,60 @@
+/* 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.
+ *
+ * EC-EC communication, functions for master.
+ */
+
+#ifndef EC_EC_COMM_MASTER_H_
+#define EC_EC_COMM_MASTER_H_
+
+#include <stdint.h>
+#include "config.h"
+
+#if defined(CONFIG_EC_EC_COMM_MASTER) && defined(CONFIG_EC_EC_COMM_BATTERY)
+#define CONFIG_EC_EC_COMM_BATTERY_MASTER
+#endif
+
+/*
+ * TODO(b:65697620): Move these to some other C file, depending on a config
+ * option.
+ */
+extern struct ec_response_battery_static_info base_battery_static;
+extern struct ec_response_battery_dynamic_info base_battery_dynamic;
+
+/**
+ * Sends EC_CMD_BATTERY_GET_DYNAMIC command to slave, and writes the
+ * battery dynamic information into base_battery_dynamic.
+ *
+ * Leaves base_battery_dynamic intact on error: it is the callers responsability
+ * to clear the data or ignore it.
+
+ * @return EC_RES_SUCCESS on success, EC_RES_ERROR on communication error,
+ * else forwards the error code from the slave.
+ */
+int ec_ec_master_base_get_dynamic_info(void);
+
+/**
+ * Sends EC_CMD_BATTERY_GET_STATIC command to slave, and writes the
+ * battery static information into base_static_dynamic.
+ *
+ * Leaves base_battery_static intact on error: it is the callers responsability
+ * to clear the data or ignore it.
+ *
+ * @return EC_RES_SUCCESS on success, EC_RES_ERROR on communication error,
+ * else forwards the error code from the slave.
+ */
+int ec_ec_master_base_get_static_info(void);
+
+/**
+ * Sends EC_CMD_CHARGER_CONTROL command to slave, with the given parameters
+ * (see ec_commands.h/ec_params_charger_control for description).
+ *
+ * @return EC_RES_SUCCESS on success, EC_RES_ERROR on communication error,
+ * else forwards the error code from the slave.
+ */
+int ec_ec_master_base_charge_control(int max_current,
+				     int otg_voltage,
+				     int allow_charging);
+
+#endif /* EC_EC_COMM_MASTER_H_ */