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/* 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 */
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