1 files changed, 101 insertions, 0 deletions
diff --git a/zephyr/include/emul/tcpc/emul_tcpci_partner_faulty_ext.h b/zephyr/include/emul/tcpc/emul_tcpci_partner_faulty_ext.h
new file mode 100644
index 0000000000..f0627c95bd
--- /dev/null
+++ b/zephyr/include/emul/tcpc/emul_tcpci_partner_faulty_ext.h
@@ -0,0 +1,101 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * 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 malfunctioning device emulator
+ */
+
+#ifndef __EMUL_TCPCI_PARTNER_FAULTY_EXT_H
+#define __EMUL_TCPCI_PARTNER_FAULTY_EXT_H
+
+#include <zephyr/drivers/emul.h>
+#include "emul/tcpc/emul_tcpci.h"
+#include "emul/tcpc/emul_tcpci_partner_common.h"
+#include "usb_pd.h"
+
+/**
+ * @brief USB-C malfunctioning device extension backend API
+ * @defgroup tcpci_faulty_ext USB-C malfunctioning device extension
+ * @{
+ *
+ * USB-C malfunctioning device extension can be used with TCPCI partner
+ * emulator. It can be configured to not respond to source capability message
+ * (by not sending GoodCRC or Request after GoodCRC).
+ */
+
+/** Structure describing malfunctioning emulator data */
+struct tcpci_faulty_ext_data {
+	struct tcpci_partner_extension ext;
+	/* List of action to perform */
+	struct k_fifo action_list;
+};
+
+/** Actions that can be performed by malfunctioning emulator */
+enum tcpci_faulty_ext_action_type {
+	/**
+	 * Fail to receive SourceCapabilities message. From TCPM point of view,
+	 * GoodCRC message is not received.
+	 */
+	TCPCI_FAULTY_EXT_FAIL_SRC_CAP = BIT(0),
+	/**
+	 * Ignore to respond to SourceCapabilities message with Request message.
+	 * From TCPM point of view, GoodCRC message is received, but Request is
+	 * missing.
+	 */
+	TCPCI_FAULTY_EXT_IGNORE_SRC_CAP = BIT(1),
+	/** Discard SourceCapabilities message and send Accept message */
+	TCPCI_FAULTY_EXT_DISCARD_SRC_CAP = BIT(2),
+};
+
+/** Structure to put in malfunctioning emulator action list */
+struct tcpci_faulty_ext_action {
+	/* Reserved for FIFO */
+	void *fifo_reserved;
+	/* Actions that emulator should perform */
+	uint32_t action_mask;
+	/* Number of times to repeat action */
+	int count;
+};
+
+/* Count of actions which is treated by emulator as infinite */
+#define TCPCI_FAULTY_EXT_INFINITE_ACTION 0
+
+/**
+ * @brief Initialise USB-C malfunctioning device data structure
+ *
+ * @param data Pointer to USB-C malfunctioning device emulator data
+ * @param common_data Pointer to USB-C device emulator common data
+ * @param ext Pointer to next USB-C emulator extension
+ *
+ * @return Pointer to USB-C malfunctioning extension
+ */
+struct tcpci_partner_extension *
+tcpci_faulty_ext_init(struct tcpci_faulty_ext_data *data,
+		      struct tcpci_partner_data *common_data,
+		      struct tcpci_partner_extension *ext);
+
+/**
+ * @brief Add action to perform by USB-C malfunctioning extension
+ *
+ * @param data Pointer to USB-C malfunctioning device extension data
+ * @param action Non standard behavior to perform by emulator
+ */
+void tcpci_faulty_ext_append_action(struct tcpci_faulty_ext_data *data,
+				    struct tcpci_faulty_ext_action *action);
+
+/**
+ * @brief Clear all actions of USB-C malfunctioning extension
+ *
+ * @param data Pointer to USB-C malfunctioning device extension data
+ */
+void tcpci_faulty_ext_clear_actions_list(struct tcpci_faulty_ext_data *data);
+
+/**
+ * @}
+ */
+
+#endif /* __EMUL_TCPCI_PARTNER_FAULTY_EXT_H */