/*
 * usbcdc.c
 *
 *  Created on: Nov 22, 2020
 *      Author: Doug
 *
 * Copyright (C) 2011-2023 Doug Brown
 *
 * 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 3 of the License, 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.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

#include "../usbcdc.h"
#include "LUFA/Drivers/USB/USB.h"
#include "cdc_device_definition.h"
#include "hardware.h"

/** Initializes the USB CDC device
 *
 */
void USBCDC_Init(void)
{
	// Initialize LUFA.
	// We have to manually start the USB PLL rather than allow LUFA to do it,
	// because we might be on an AT90USB128x instead of AT90USB64x, and LUFA's
	// automatic PLL control decides on the PLL init value at compile time.
	// It differs between the two chips when there's a 16 MHz crystal.
	if (IsAT90USB128x())
	{
		PLLCSR = (1 << PLLP2) | (1 << PLLP0);
		PLLCSR = ((1 << PLLP2) | (1 << PLLP0) | (1 << PLLE));
	}
	else
	{
		PLLCSR = (1 << PLLP2) | (1 << PLLP1);
		PLLCSR = ((1 << PLLP2) | (1 << PLLP1) | (1 << PLLE));
	}
	while (!USB_PLL_IsReady());
	USB_Init();
}

/** Disables the USB CDC device
 *
 */
void USBCDC_Disable(void)
{
	// Disable LUFA, this will cause us to no longer identify as a USB device
	USB_Disable();
	USB_PLL_Off();
}

/** Main loop handler for the USB CDC device. Call from the main loop.
 *
 */
void USBCDC_Check(void)
{
	// Do the periodic CDC and USB tasks in LUFA
	CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
	USB_USBTask();
}

/** LUFA event handler for when the USB configuration changes.
 *
 */
void EVENT_USB_Device_ConfigurationChanged(void)
{
	bool ConfigSuccess = true;

	ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
}

/** LUFA event handler for when a USB control request is received
 *
 */
void EVENT_USB_Device_ControlRequest(void)
{
	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
}