/**
  ******************************************************************************
  * @file    sd_diskio.c (based on sd_diskio_template.c v2.0.2 as "Use dma template" is disabled)
  * @brief   SD 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 "sd_diskio.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* use the default SD timout as defined in the platform BSP driver*/
#if defined(SDMMC_DATATIMEOUT)
#define SD_TIMEOUT SDMMC_DATATIMEOUT
#elif defined(SD_DATATIMEOUT)
#define SD_TIMEOUT SD_DATATIMEOUT
#else
#define SD_TIMEOUT 30 * 1000
#endif

#define SD_DEFAULT_BLOCK_SIZE 512

/*
 * Depending on the use case, the SD card initialization could be done at the
 * application level: if it is the case define the flag below to disable
 * the BSP_SD_Init() call in the SD_Initialize() and add a call to 
 * BSP_SD_Init() elsewhere in the application.
 */
/* USER CODE BEGIN disableSDInit */
/* #define DISABLE_SD_INIT */
/* USER CODE END disableSDInit */

/* Private variables ---------------------------------------------------------*/
/* Disk status */
static volatile DSTATUS Stat = STA_NOINIT;

/* Private function prototypes -----------------------------------------------*/
static DSTATUS SD_CheckStatus(BYTE lun);
DSTATUS SD_initialize (BYTE);
DSTATUS SD_status (BYTE);
DRESULT SD_read (BYTE, BYTE*, DWORD, UINT);
#if _USE_WRITE == 1
  DRESULT SD_write (BYTE, const BYTE*, DWORD, UINT);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
  DRESULT SD_ioctl (BYTE, BYTE, void*);
#endif  /* _USE_IOCTL == 1 */

const Diskio_drvTypeDef  SD_Driver =
{
  SD_initialize,
  SD_status,
  SD_read,
#if  _USE_WRITE == 1
  SD_write,
#endif /* _USE_WRITE == 1 */

#if  _USE_IOCTL == 1
  SD_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 ---------------------------------------------------------*/
static DSTATUS SD_CheckStatus(BYTE lun)
{
  Stat = STA_NOINIT;

  if(BSP_SD_GetCardState() == MSD_OK)
  {
    Stat &= ~STA_NOINIT;
  }

  return Stat;
}

/**
  * @brief  Initializes a Drive
  * @param  lun : not used
  * @retval DSTATUS: Operation status
  */
DSTATUS SD_initialize(BYTE lun)
{
  Stat = STA_NOINIT;
#if !defined(DISABLE_SD_INIT)

  if(BSP_SD_Init() == MSD_OK)
  {
    Stat = SD_CheckStatus(lun);
  }

#else
  Stat = SD_CheckStatus(lun);
#endif
  return Stat;
}

/**
  * @brief  Gets Disk Status
  * @param  lun : not used
  * @retval DSTATUS: Operation status
  */
DSTATUS SD_status(BYTE lun)
{
  return SD_CheckStatus(lun);
}

/* 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 : not used
  * @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 SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
{
  DRESULT res = RES_ERROR;

  if(BSP_SD_ReadBlocks((uint32_t*)buff,
                       (uint32_t) (sector),
                       count, SD_TIMEOUT) == MSD_OK)
  {
    /* wait until the read operation is finished */
    while(BSP_SD_GetCardState()!= MSD_OK)
    {
    }
    res = RES_OK;
  }

  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 : not used
  * @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 SD_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
{
  DRESULT res = RES_ERROR;

  if(BSP_SD_WriteBlocks((uint32_t*)buff,
                        (uint32_t)(sector),
                        count, SD_TIMEOUT) == MSD_OK)
  {
	/* wait until the Write operation is finished */
    while(BSP_SD_GetCardState() != MSD_OK)
    {
    }
    res = RES_OK;
  }

  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 : not used
  * @param  cmd: Control code
  * @param  *buff: Buffer to send/receive control data
  * @retval DRESULT: Operation result
  */
#if _USE_IOCTL == 1
DRESULT SD_ioctl(BYTE lun, BYTE cmd, void *buff)
{
  DRESULT res = RES_ERROR;
  BSP_SD_CardInfo CardInfo;

  if (Stat & STA_NOINIT) return RES_NOTRDY;

  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 :
    BSP_SD_GetCardInfo(&CardInfo);
    *(DWORD*)buff = CardInfo.LogBlockNbr;
    res = RES_OK;
    break;

  /* Get R/W sector size (WORD) */
  case GET_SECTOR_SIZE :
    BSP_SD_GetCardInfo(&CardInfo);
    *(WORD*)buff = CardInfo.LogBlockSize;
    res = RES_OK;
    break;

  /* Get erase block size in unit of sector (DWORD) */
  case GET_BLOCK_SIZE :
    BSP_SD_GetCardInfo(&CardInfo);
    *(DWORD*)buff = CardInfo.LogBlockSize / SD_DEFAULT_BLOCK_SIZE;
    res = RES_OK;
    break;

  default:
    res = RES_PARERR;
  }

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

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

/* 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****/