/*-----------------------------------------------------------------------*/
/* Low level disk I/O module SKELETON for FatFs     (C)ChaN, 2019        */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be        */
/* attached to the FatFs via a glue function rather than modifying it.   */
/* This is an example of glue functions to attach various exsisting      */
/* storage control modules to the FatFs module with a defined API.       */
/*-----------------------------------------------------------------------*/

#include "ff.h"			/* Obtains integer types */
#include "diskio.h"		/* Declarations of disk functions */
#include "sd_io.h"
#include "sysconfig.h"

extern SD_DEV sdcard_dev;

/* Definitions of physical drive number for each drive */
#define DEV_RAM		0	/* Example: Map Ramdisk to physical drive 0 */
#define DEV_MMC		1	/* Example: Map MMC/SD card to physical drive 1 */
#define DEV_USB		2	/* Example: Map USB MSD to physical drive 2 */


/*-----------------------------------------------------------------------*/
/* Get Drive Status                                                      */
/*-----------------------------------------------------------------------*/

DSTATUS disk_status (
	BYTE pdrv		/* Physical drive nmuber to identify the drive */
)
{
    //res = SD_Status(&sdcard_dev);

    return sdcard_dev.mount ? RES_OK : STA_NODISK;
}



/*-----------------------------------------------------------------------*/
/* Inidialize a Drive                                                    */
/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize (
	BYTE pdrv				/* Physical drive nmuber to identify the drive */
)
{
    DSTATUS stat;
    SDRESULTS res;

    if (sdcard_dev.mount)
        return SD_OK;

    res = SD_Init(&sdcard_dev);

    return (res == SD_OK) ? RES_OK : STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */
/*-----------------------------------------------------------------------*/

DRESULT disk_read (
	BYTE pdrv,		/* Physical drive nmuber to identify the drive */
	BYTE *buff,		/* Data buffer to store read data */
	LBA_t sector,	/* Start sector in LBA */
	UINT count		/* Number of sectors to read */
)
{
    SDRESULTS res;
    int i;

    if (!sdcard_dev.mount)
        return STA_NOINIT;

    for (i=0; i<count; i++) {
        res = SD_Read(&sdcard_dev, (void*)&buff[i*SD_BLK_SIZE], sector+i, 0, SD_BLK_SIZE);
        if (res != SD_OK)
            return RES_PARERR;
    }

    return (res == SD_OK) ? RES_OK : RES_PARERR;
}



/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */
/*-----------------------------------------------------------------------*/

#if FF_FS_READONLY == 0

DRESULT disk_write (
	BYTE pdrv,			/* Physical drive nmuber to identify the drive */
	const BYTE *buff,	/* Data to be written */
	LBA_t sector,		/* Start sector in LBA */
	UINT count			/* Number of sectors to write */
)
{
    SDRESULTS res;
    int i;

    if (!sdcard_dev.mount)
        return STA_NOINIT;

    for (i=0; i<count; i++) {
        res = SD_Write(&sdcard_dev, (void*)&buff[i*SD_BLK_SIZE], sector+i);
        if (res != SD_OK)
            return RES_PARERR;
    }

    return RES_OK;
}

#endif


/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/

DRESULT disk_ioctl (
	BYTE pdrv,		/* Physical drive nmuber (0..) */
	BYTE cmd,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
    DRESULT res;
    int result;

    return RES_PARERR;
}

