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/* 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 dual role device emulator
*/
#ifndef __EMUL_TCPCI_PARTNER_DRP_H
#define __EMUL_TCPCI_PARTNER_DRP_H
#include "emul/tcpc/emul_tcpci.h"
#include "emul/tcpc/emul_tcpci_partner_common.h"
#include "emul/tcpc/emul_tcpci_partner_snk.h"
#include "emul/tcpc/emul_tcpci_partner_src.h"
#include "usb_pd.h"
#include <zephyr/drivers/emul.h>
/**
* @brief USB-C dual role device extension backend API
* @defgroup tcpci_snk_emul USB-C dual role device extension
* @{
*
* USB-C DRP device emulator can be used with TCPCI partner emulator. It is able
* to switch power role on PR SWAP message. It is required to provide sink and
* source extensions to initialise the DRP extension. If sink or source
* extension first capabilities PDO is changed after initialisation, function
* @ref tcpci_drp_emul_set_dr_in_first_pdo should be called to select correct
* flag specific for DRP device.
*/
/** Structure describing dual role device emulator data */
struct tcpci_drp_emul_data {
/** Common extension structure */
struct tcpci_partner_extension ext;
/** Controls if device is sink or source */
bool sink;
/** If device is during power swap and is expecting PS_RDY message */
bool in_pwr_swap;
/** Initial power role that should be restored on hard reset */
enum pd_power_role initial_power_role;
};
/**
* @brief Initialise USB-C DRP device data structure
*
* @param data Pointer to USB-C DRP device emulator data
* @param common_data Pointer to USB-C device emulator common data
* @param power_role Default power role used by USB-C DRP device on connection
* @param src_ext Pointer to source extension
* @param sink_ext Pointer to sink extension
*
* @return Pointer to USB-C DRP extension
*/
struct tcpci_partner_extension *
tcpci_drp_emul_init(struct tcpci_drp_emul_data *data,
struct tcpci_partner_data *common_data,
enum pd_power_role power_role,
struct tcpci_partner_extension *src_ext,
struct tcpci_partner_extension *snk_ext);
/**
* @brief Set correct flags for first capabilities PDO to indicate that this
* device is power swap capable.
*
* @param pdo capability entry to change
*/
void tcpci_drp_emul_set_dr_in_first_pdo(uint32_t *pdo);
/**
* @}
*/
#endif /* __EMUL_TCPCI_PARTNER_DRP_H */
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