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/* Copyright 2020 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.
*/
/*
* USB4 mode support
* Refer USB Type-C Cable and Connector Specification Release 2.0 Section 5 and
* USB Power Delivery Specification Revision 3.0, Version 2.0 Section 6.4.8
*/
#ifndef __CROS_EC_USB_MODE_H
#define __CROS_EC_USB_MODE_H
#include <stdint.h>
#include "tcpm/tcpm.h"
#include "usb_pd_tcpm.h"
/*
* Initialize USB4 state for the specified port.
*
* @param port USB-C port number
*/
void enter_usb_init(int port);
/*
* Checks whether the mode entry sequence for USB4 is done for a port.
*
* @param port USB-C port number
* @return True if entry sequence for USB4 is completed
* False otherwise
*/
bool enter_usb_entry_is_done(int port);
/*
* Requests the retimer and mux to exit USB4 mode and re-initalizes the USB4
* state machine.
*
* @param port USB-C port number
*/
void usb4_exit_mode_request(int port);
/*
* Resets USB4 state and mux state.
*
* @param port USB-C port number
*/
void enter_usb_failed(int port);
/*
* Returns True if port partner supports USB4 mode
*
* @param port USB-C port number
* @return True if USB4 mode is supported by the port partner,
* False otherwise
*/
bool enter_usb_port_partner_is_capable(int port);
/*
* Returns True if cable supports USB4 mode
*
* @param port USB-C port number
* @return True if USB4 mode is supported by the cable,
* False otherwise
*/
bool enter_usb_cable_is_capable(int port);
/*
* Handles accepted USB4 response
*
* @param port USB-C port number
* @param type Transmit type (SOP, SOP', SOP'') for request
*/
void enter_usb_accepted(int port, enum tcpci_msg_type type);
/*
* Handles rejected USB4 response
*
* @param port USB-C port number
* @param type Transmit type (SOP, SOP', SOP'') for request
*/
void enter_usb_rejected(int port, enum tcpci_msg_type type);
/*
* Constructs the next USB4 EUDO that should be sent.
*
* @param port USB-C port number
* @param type Transmit type (SOP, SOP', SOP'') for request
*/
uint32_t enter_usb_setup_next_msg(int port, enum tcpci_msg_type *type);
#endif
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