/*
 * SPDX-FileCopyrightText: Copyright (c) 2023 Ha Thach (tinyusb.org)
 * SPDX-License-Identifier: MIT
 *
 * This file is part of the TinyUSB stack.
 */

#ifndef TUSB_TCD_H_
#define TUSB_TCD_H_

#include "common/tusb_common.h"
#include "pd_types.h"

#include "osal/osal.h"
#include "common/tusb_fifo.h"

#ifdef __cplusplus
extern "C" {
#endif

//--------------------------------------------------------------------+
//
//--------------------------------------------------------------------+

enum {
  TCD_EVENT_INVALID = 0,
  TCD_EVENT_CC_CHANGED,
  TCD_EVENT_RX_COMPLETE,
  TCD_EVENT_TX_COMPLETE,
};

typedef struct TU_ATTR_PACKED {
  uint8_t rhport;
  uint8_t event_id;

  union {
    struct {
      uint8_t cc_state[2];
    } cc_changed;

    struct TU_ATTR_PACKED {
      uint16_t result : 2;
      uint16_t xferred_bytes : 14;
    } xfer_complete;
  };

} tcd_event_t;

//--------------------------------------------------------------------+
//
//--------------------------------------------------------------------+

// Initialize controller
bool tcd_init(uint8_t rhport, uint32_t port_type);

// Enable interrupt
void tcd_int_enable (uint8_t rhport);

// Disable interrupt
void tcd_int_disable(uint8_t rhport);

// Enable Type-C port terminations
void tcd_connect(uint8_t rhport);

// Disable Type-C port terminations
void tcd_disconnect(uint8_t rhport);

// Interrupt Handler
void tcd_int_handler(uint8_t rhport);

//--------------------------------------------------------------------+
//
//--------------------------------------------------------------------+

bool tcd_msg_receive(uint8_t rhport, uint8_t* buffer, uint16_t total_bytes);
bool tcd_msg_send(uint8_t rhport, uint8_t const* buffer, uint16_t total_bytes);

//--------------------------------------------------------------------+
// Event API (implemented by stack)
// Called by TCD to notify stack
//--------------------------------------------------------------------+

extern void tcd_event_handler(tcd_event_t const * event, bool in_isr);

TU_ATTR_ALWAYS_INLINE static inline
void tcd_event_cc_changed(uint8_t rhport, uint8_t cc1, uint8_t cc2, bool in_isr) {
  tcd_event_t event = {
    .rhport   = rhport,
    .event_id = TCD_EVENT_CC_CHANGED,
    .cc_changed = {
        .cc_state = {cc1, cc2 }
    }
  };

  tcd_event_handler(&event, in_isr);
}

TU_ATTR_ALWAYS_INLINE static inline
void tcd_event_rx_complete(uint8_t rhport, uint16_t xferred_bytes, uint8_t result, bool in_isr) {
  tcd_event_t event = {
    .rhport   = rhport,
    .event_id = TCD_EVENT_RX_COMPLETE,
    .xfer_complete = {
        .xferred_bytes = xferred_bytes,
        .result        = result
    }
  };

  tcd_event_handler(&event, in_isr);
}

TU_ATTR_ALWAYS_INLINE static inline
void tcd_event_tx_complete(uint8_t rhport, uint16_t xferred_bytes, uint8_t result, bool in_isr) {
  tcd_event_t event = {
      .rhport   = rhport,
      .event_id = TCD_EVENT_TX_COMPLETE,
      .xfer_complete = {
          .xferred_bytes = xferred_bytes,
          .result        = result
      }
  };

  tcd_event_handler(&event, in_isr);
}

#ifdef __cplusplus
}
#endif

#endif