1 files changed, 66 insertions, 0 deletions
diff --git a/zephyr/include/emul/emul_charger.h b/zephyr/include/emul/emul_charger.h
new file mode 100644
index 0000000000..87303181e8
--- /dev/null
+++ b/zephyr/include/emul/emul_charger.h
@@ -0,0 +1,66 @@
+/* Copyright 2021 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.
+ */
+
+/**
+ * @file
+ *
+ * @brief Backend API for USB-C charger emulator
+ */
+
+#ifndef __EMUL_CHARGER_H
+#define __EMUL_CHARGER_H
+
+#include <emul.h>
+#include "emul/emul_tcpci.h"
+
+/**
+ * @brief USB-C charger emulator backend API
+ * @defgroup charger_emul USB-C charger emulator
+ * @{
+ *
+ * USB-C charger emulator can be attached to TCPCI emulator. It is able to
+ * respond to some TCPM messages. It always attach as source and present
+ * hardcoded set of source capabilities.
+ */
+
+/** Structure describing charger emulator */
+struct charger_emul_data {
+	/** Operations used by TCPCI emulator */
+	struct tcpci_emul_partner_ops ops;
+	/** Work used to send message with delay */
+	struct k_work_delayable delayed_send;
+	/** Pointer to connected TCPCI emulator */
+	const struct emul *tcpci_emul;
+	/** Queue for delayed messages */
+	struct k_fifo to_send;
+	/** Next SOP message id */
+	int msg_id;
+};
+
+/**
+ * @brief Initialise USB-C charger emulator. Need to be called before any other
+ *        function.
+ *
+ * @param data Pointer to USB-C charger emulator
+ */
+void charger_emul_init(struct charger_emul_data *data);
+
+/**
+ * @brief Connect emulated device to TCPCI
+ *
+ * @param data Pointer to USB-C charger emulator
+ * @param tcpci_emul Poinetr to TCPCI emulator to connect
+ *
+ * @return 0 on success
+ * @return negative on TCPCI connect error or send source capabilities error
+ */
+int charger_emul_connect_to_tcpci(struct charger_emul_data *data,
+				  const struct emul *tcpci_emul);
+
+/**
+ * @}
+ */
+
+#endif /* __EMUL_CHARGER */