/**
  ******************************************************************************
  * @file    usbh_diskio.c (based on usbh_diskio_template.c v2.0.2)
  * @brief   USB Host Disk I/O driver
  ******************************************************************************
  * This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * Copyright (c) 2018 STMicroelectronics International N.V. 
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without 
  * modification, are permitted, provided that the following conditions are met:
  *
  * 1. Redistribution of source code must retain the above copyright notice, 
  *    this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. Neither the name of STMicroelectronics nor the names of other 
  *    contributors to this software may be used to endorse or promote products 
  *    derived from this software without specific written permission.
  * 4. This software, including modifications and/or derivative works of this 
  *    software, must execute solely and exclusively on microcontroller or
  *    microprocessor devices manufactured by or for STMicroelectronics.
  * 5. Redistribution and use of this software other than as permitted under 
  *    this license is void and will automatically terminate your rights under 
  *    this license. 
  *
  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
  * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* USER CODE BEGIN firstSection */ 
/* can be used to modify / undefine following code or add new definitions */
/* USER CODE END firstSection */ 

/* Includes ------------------------------------------------------------------*/
#include "ff_gen_drv.h"
#include "usbh_diskio.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

#define USB_DEFAULT_BLOCK_SIZE 512

/* Private variables ---------------------------------------------------------*/
extern USBH_HandleTypeDef  hUSB_Host;

/* Private function prototypes -----------------------------------------------*/
DSTATUS USBH_initialize (BYTE);
DSTATUS USBH_status (BYTE);
DRESULT USBH_read (BYTE, BYTE*, DWORD, UINT);

#if _USE_WRITE == 1
  DRESULT USBH_write (BYTE, const BYTE*, DWORD, UINT);
#endif /* _USE_WRITE == 1 */

#if _USE_IOCTL == 1
  DRESULT USBH_ioctl (BYTE, BYTE, void*);
#endif /* _USE_IOCTL == 1 */

const Diskio_drvTypeDef  USBH_Driver =
{
  USBH_initialize,
  USBH_status,
  USBH_read,
#if  _USE_WRITE == 1
  USBH_write,
#endif /* _USE_WRITE == 1 */
#if  _USE_IOCTL == 1
  USBH_ioctl,
#endif /* _USE_IOCTL == 1 */
};

/* USER CODE BEGIN beforeFunctionSection */
/* can be used to modify / undefine following code or add new code */
/* USER CODE END beforeFunctionSection */

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Initializes a Drive
  * @param  lun : lun id
  * @retval DSTATUS: Operation status
  */
DSTATUS USBH_initialize(BYTE lun)
{
  /* CAUTION : USB Host library has to be initialized in the application */

  return RES_OK;
}

/**
  * @brief  Gets Disk Status
  * @param  lun : lun id
  * @retval DSTATUS: Operation status
  */
DSTATUS USBH_status(BYTE lun)
{
  DRESULT res = RES_ERROR;

  if(USBH_MSC_UnitIsReady(&hUSB_Host, lun))
  {
    res = RES_OK;
  }
  else
  {
    res = RES_ERROR;
  }

  return res;
}

/* USER CODE BEGIN beforeReadSection */
/* can be used to modify previous code / undefine following code / add new code */
/* USER CODE END beforeReadSection */

/**
  * @brief  Reads Sector(s)
  * @param  lun : lun id
  * @param  *buff: Data buffer to store read data
  * @param  sector: Sector address (LBA)
  * @param  count: Number of sectors to read (1..128)
  * @retval DRESULT: Operation result
  */
DRESULT USBH_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
{
  DRESULT res = RES_ERROR;
  MSC_LUNTypeDef info;

  if(USBH_MSC_Read(&hUSB_Host, lun, sector, buff, count) == USBH_OK)
  {
    res = RES_OK;
  }
  else
  {
    USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info);

    switch (info.sense.asc)
    {
    case SCSI_ASC_LOGICAL_UNIT_NOT_READY:
    case SCSI_ASC_MEDIUM_NOT_PRESENT:
    case SCSI_ASC_NOT_READY_TO_READY_CHANGE:
      USBH_ErrLog ("USB Disk is not ready!");
      res = RES_NOTRDY;
      break; 

    default:
      res = RES_ERROR;
      break;
    }
  }

  return res;
}

/* USER CODE BEGIN beforeWriteSection */
/* can be used to modify previous code / undefine following code / add new code */
/* USER CODE END beforeWriteSection */

/**
  * @brief  Writes Sector(s)
  * @param  lun : lun id
  * @param  *buff: Data to be written
  * @param  sector: Sector address (LBA)
  * @param  count: Number of sectors to write (1..128)
  * @retval DRESULT: Operation result
  */
#if _USE_WRITE == 1
DRESULT USBH_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
{
  DRESULT res = RES_ERROR;
  MSC_LUNTypeDef info;

  if(USBH_MSC_Write(&hUSB_Host, lun, sector, (BYTE *)buff, count) == USBH_OK)
  {
    res = RES_OK;
  }
  else
  {
    USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info);

    switch (info.sense.asc)
    {
    case SCSI_ASC_WRITE_PROTECTED:
      USBH_ErrLog("USB Disk is Write protected!");
      res = RES_WRPRT;
      break;

    case SCSI_ASC_LOGICAL_UNIT_NOT_READY:
    case SCSI_ASC_MEDIUM_NOT_PRESENT:
    case SCSI_ASC_NOT_READY_TO_READY_CHANGE:
      USBH_ErrLog("USB Disk is not ready!");
      res = RES_NOTRDY;
      break;

    default:
      res = RES_ERROR;
      break;
    }
  }

  return res;
}
#endif /* _USE_WRITE == 1 */

/* USER CODE BEGIN beforeIoctlSection */
/* can be used to modify previous code / undefine following code / add new code */
/* USER CODE END beforeIoctlSection */

/**
  * @brief  I/O control operation
  * @param  lun : lun id
  * @param  cmd: Control code
  * @param  *buff: Buffer to send/receive control data
  * @retval DRESULT: Operation result
  */
#if _USE_IOCTL == 1
DRESULT USBH_ioctl(BYTE lun, BYTE cmd, void *buff)
{
  DRESULT res = RES_ERROR;
  MSC_LUNTypeDef info;

  switch (cmd)
  {
  /* Make sure that no pending write process */
  case CTRL_SYNC:
    res = RES_OK;
    break;

  /* Get number of sectors on the disk (DWORD) */
  case GET_SECTOR_COUNT :
    if(USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK)
    {
      *(DWORD*)buff = info.capacity.block_nbr;
      res = RES_OK;
    }
    else
    {
      res = RES_ERROR;
    }
    break;

  /* Get R/W sector size (WORD) */
  case GET_SECTOR_SIZE :
    if(USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK)
    {
      *(DWORD*)buff = info.capacity.block_size;
      res = RES_OK;
    }
    else
    {
      res = RES_ERROR;
    }
    break;

    /* Get erase block size in unit of sector (DWORD) */
  case GET_BLOCK_SIZE :

    if(USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK)
    {
      *(DWORD*)buff = info.capacity.block_size / USB_DEFAULT_BLOCK_SIZE;
      res = RES_OK;
    }
    else
    {
      res = RES_ERROR;
    }
    break;

  default:
    res = RES_PARERR;
  }

  return res;
}
#endif /* _USE_IOCTL == 1 */

/* USER CODE BEGIN lastSection */ 
/* can be used to modify / undefine previous code or add new code */
/* USER CODE END lastSection */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/