/*******************************************************************************
*   Ledger Nano S - Secure firmware
*   (c) 2022 Ledger
*
*  Licensed under the Apache License, Version 2.0 (the "License");
*  you may not use this file except in compliance with the License.
*  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
********************************************************************************/

#ifndef OS_IO_USB_H
#define OS_IO_USB_H

#include "os_io_seproxyhal.h"
#include "os_io.h"

#ifdef HAVE_USB_APDU

/* ----------------------------------------------------------------------- */
/* -                            IO FUNCTIONS                             - */
/* ----------------------------------------------------------------------- */
typedef void (*io_send_t)(unsigned char* buffer, unsigned short length);

typedef unsigned short (*io_recv_t)(unsigned char* buffer, unsigned short maxlenth);


typedef enum io_usb_hid_receive_status_e {
  IO_USB_APDU_RESET,
  IO_USB_APDU_MORE_DATA,
  IO_USB_APDU_RECEIVED,
} io_usb_hid_receive_status_t;

extern volatile unsigned int   G_io_usb_hid_total_length;

void io_usb_hid_init(void);

/**
 * Receive next HID transport packet, returns IO_USB_APDU_RECEIVED when a complete APDU has been received in the G_io_apdu_buffer
 * To be called typically upon USB OUT event
 */
io_usb_hid_receive_status_t
io_usb_hid_receive(io_send_t sndfct, unsigned char *buffer, unsigned short l, apdu_buffer_t * apdu_buffer);

/**
 * Mark the last chunk transmitted as sent.
 * To be called typically upon USB IN ACK event
 */
void io_usb_hid_sent(io_send_t sndfct);

/** 
 * Request transmission of an APDU from the G_io_apdu_buffer using the HID transport protocol
 */
void io_usb_hid_send(io_send_t sndfct, unsigned short sndlength, unsigned char * apdu_buffer);

#endif // HAVE_USB_APDU

#endif