/*
             LUFA Library
     Copyright (C) Dean Camera, 2019.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2019  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaims all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Main source file for the MassStorageHost demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 */

#include "MassStorageHost.h"

/** LUFA Mass Storage Class driver interface configuration and state information. This structure is
 *  passed to all Mass Storage Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another.
 */
USB_ClassInfo_MS_Host_t FlashDisk_MS_Interface =
	{
		.Config =
			{
				.DataINPipe             =
					{
						.Address        = (PIPE_DIR_IN  | 1),
						.Banks          = 1,
					},
				.DataOUTPipe            =
					{
						.Address        = (PIPE_DIR_OUT | 2),
						.Banks          = 1,
					},
			},
	};


/** Main program entry point. This routine configures the hardware required by the application, then
 *  enters a loop to run the application tasks in sequence.
 */
int main(void)
{
	SetupHardware();

	puts_P(PSTR(ESC_FG_CYAN "Mass Storage Host Demo running.\r\n" ESC_FG_WHITE));

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	GlobalInterruptEnable();

	for (;;)
	{
		MassStorageHost_Task();

		MS_Host_USBTask(&FlashDisk_MS_Interface);
		USB_USBTask();
	}
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
#if (ARCH == ARCH_AVR8)
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

	/* Disable clock division */
	clock_prescale_set(clock_div_1);
#endif

	/* Hardware Initialization */
	Serial_Init(9600, false);
	LEDs_Init();
	USB_Init();

	/* Create a stdio stream for the serial port for stdin and stdout */
	Serial_CreateStream(NULL);
}

/** Task to manage an enumerated USB Mass Storage device once connected, to print out
 *  data from the device.
 */
void MassStorageHost_Task(void)
{
	if (USB_HostState != HOST_STATE_Configured)
	  return;

	LEDs_SetAllLEDs(LEDMASK_USB_BUSY);

	puts_P(PSTR("Waiting until ready...\r\n"));

	for (;;)
	{
		uint8_t ErrorCode = MS_Host_TestUnitReady(&FlashDisk_MS_Interface, 0);

		if (!(ErrorCode))
		  break;

		/* Check if an error other than a logical command error (device busy) received */
		if (ErrorCode != MS_ERROR_LOGICAL_CMD_FAILED)
		{
			puts_P(PSTR("Error waiting for device to be ready.\r\n"));
			LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
			USB_Host_SetDeviceConfiguration(0);
			return;
		}
	}

	puts_P(PSTR("Retrieving Capacity...\r\n"));

	SCSI_Capacity_t DiskCapacity;
	if (MS_Host_ReadDeviceCapacity(&FlashDisk_MS_Interface, 0, &DiskCapacity))
	{
		puts_P(PSTR("Error retrieving device capacity.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	printf_P(PSTR("%lu blocks of %lu bytes.\r\n"), DiskCapacity.Blocks, DiskCapacity.BlockSize);

	uint8_t BlockBuffer[DiskCapacity.BlockSize];

	if (MS_Host_ReadDeviceBlocks(&FlashDisk_MS_Interface, 0, 0x00000000, 1, DiskCapacity.BlockSize, BlockBuffer))
	{
		puts_P(PSTR("Error reading device block.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	puts_P(PSTR("\r\nContents of first block:\r\n"));

	for (uint16_t Chunk = 0; Chunk < (DiskCapacity.BlockSize >> 4); Chunk++)
	{
		uint8_t* ChunkPtr = &BlockBuffer[Chunk << 4];

		/* Print out the 16 bytes of the chunk in HEX format */
		for (uint8_t ByteOffset = 0; ByteOffset < (1 << 4); ByteOffset++)
		{
			char CurrByte = *(ChunkPtr + ByteOffset);
			printf_P(PSTR("%.2X "), CurrByte);
		}

		printf_P(PSTR("    "));

		/* Print out the 16 bytes of the chunk in ASCII format */
		for (uint8_t ByteOffset = 0; ByteOffset < (1 << 4); ByteOffset++)
		{
			char CurrByte = *(ChunkPtr + ByteOffset);
			putchar(isprint(CurrByte) ? CurrByte : '.');
		}

		printf_P(PSTR("\r\n"));
	}

	LEDs_SetAllLEDs(LEDMASK_USB_READY);
	USB_Host_SetDeviceConfiguration(0);
}

/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 *  starts the library USB task to begin the enumeration and USB management process.
 */
void EVENT_USB_Host_DeviceAttached(void)
{
	puts_P(PSTR("Device Attached.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}

/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 *  stops the library USB task management process.
 */
void EVENT_USB_Host_DeviceUnattached(void)
{
	puts_P(PSTR("\r\nDevice Unattached.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}

/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 *  enumerated by the host and is now ready to be used by the application.
 */
void EVENT_USB_Host_DeviceEnumerationComplete(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);

	uint16_t ConfigDescriptorSize;
	uint8_t  ConfigDescriptorData[512];

	if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
	                                       sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
	{
		puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (MS_Host_ConfigurePipes(&FlashDisk_MS_Interface,
	                           ConfigDescriptorSize, ConfigDescriptorData) != MS_ENUMERROR_NoError)
	{
		puts_P(PSTR("Attached Device Not a Valid Mass Storage Device.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Setting Device Configuration.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	uint8_t MaxLUNIndex;
	if (MS_Host_GetMaxLUN(&FlashDisk_MS_Interface, &MaxLUNIndex))
	{
		puts_P(PSTR("Error retrieving max LUN index.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	printf_P(PSTR("Total LUNs: %d - Using first LUN in device.\r\n"), (MaxLUNIndex + 1));

	if (MS_Host_ResetMSInterface(&FlashDisk_MS_Interface))
	{
		puts_P(PSTR("Error resetting Mass Storage interface.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	SCSI_Request_Sense_Response_t SenseData;
	if (MS_Host_RequestSense(&FlashDisk_MS_Interface, 0, &SenseData) != 0)
	{
		puts_P(PSTR("Error retrieving device sense.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	if (MS_Host_PreventAllowMediumRemoval(&FlashDisk_MS_Interface, 0, true))
	{
		puts_P(PSTR("Error setting Prevent Device Removal bit.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	SCSI_Inquiry_Response_t InquiryData;
	if (MS_Host_GetInquiryData(&FlashDisk_MS_Interface, 0, &InquiryData))
	{
		puts_P(PSTR("Error retrieving device Inquiry data.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	printf_P(PSTR("Vendor \"%.8s\", Product \"%.16s\"\r\n"), InquiryData.VendorID, InquiryData.ProductID);

	puts_P(PSTR("Mass Storage Device Enumerated.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
}

/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
{
	USB_Disable();

	printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
	                         " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);

	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	for(;;);
}

/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 *  enumerating an attached USB device.
 */
void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
                                            const uint8_t SubErrorCode)
{
	printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
	                         " -- Error Code %d\r\n"
	                         " -- Sub Error Code %d\r\n"
	                         " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);

	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
}

