/*
 * Copyright 2012 Jared Boone
 *
 * This file is part of AirSpy (based on HackRF project).
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include "usb.h"
#include "usb_request.h"
#include "usb_queue.h"

#include <stdbool.h>

static void usb_request(
  usb_endpoint_t* const endpoint,
  const usb_transfer_stage_t stage)
{
  usb_request_status_t status = USB_REQUEST_STATUS_STALL;
  usb_request_handler_fn handler = 0;

  switch( endpoint->setup.request_type & USB_SETUP_REQUEST_TYPE_mask )
  {
    case USB_SETUP_REQUEST_TYPE_STANDARD:
      handler = usb_request_handlers.standard;
      break;

    case USB_SETUP_REQUEST_TYPE_CLASS:
      handler = usb_request_handlers.class;
      break;

    case USB_SETUP_REQUEST_TYPE_VENDOR:
      handler = usb_request_handlers.vendor;
      break;

    case USB_SETUP_REQUEST_TYPE_RESERVED:
      handler = usb_request_handlers.reserved;
      break;
  }

  if( handler ) {
    status = handler(endpoint, stage);
  }

  if( status != USB_REQUEST_STATUS_OK ) {
    // USB 2.0 section 9.2.7 "Request Error"
    usb_endpoint_stall(endpoint);
  }
}

void usb_setup_complete(usb_endpoint_t* const endpoint)
{
  usb_request(endpoint, USB_TRANSFER_STAGE_SETUP);
}

void usb_control_out_complete(usb_endpoint_t* const endpoint)
{
  const bool device_to_host =
    endpoint->setup.request_type >> USB_SETUP_REQUEST_TYPE_DATA_TRANSFER_DIRECTION_shift;
  if( device_to_host ) {
    usb_request(endpoint, USB_TRANSFER_STAGE_STATUS);
  } else {
    usb_request(endpoint, USB_TRANSFER_STAGE_DATA);
  }
        usb_queue_transfer_complete(endpoint);
}

void usb_control_in_complete(usb_endpoint_t* const endpoint)
{
  const bool device_to_host =
    endpoint->setup.request_type >> USB_SETUP_REQUEST_TYPE_DATA_TRANSFER_DIRECTION_shift;
  if( device_to_host ) {
    usb_request(endpoint, USB_TRANSFER_STAGE_DATA);
  } else {
    usb_request(endpoint, USB_TRANSFER_STAGE_STATUS);
  }
  usb_queue_transfer_complete(endpoint);
}

