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/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
/*-----------------------------------------------------------------------*/
/* This is a stub disk I/O module that acts as front end of the existing */
/* disk I/O modules and attach it to FatFs module with common interface. */
/*-----------------------------------------------------------------------*/
#include "hal.h"
#include "ffconf.h"
#include "diskio.h"
#include "usbh.h"
#include "usbh/dev/msd.h"
/*-----------------------------------------------------------------------*/
/* Correspondence between physical drive number and physical drive. */
#define MSDLUN0 0
/*-----------------------------------------------------------------------*/
/* Inidialize a Drive */
DSTATUS disk_initialize (
BYTE pdrv /* Physical drive nmuber (0..) */
)
{
DSTATUS stat;
switch (pdrv) {
case MSDLUN0:
stat = 0;
/* It is initialized externally, just reads the status.*/
if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
stat |= STA_NOINIT;
return stat;
}
return STA_NOINIT;
}
/*-----------------------------------------------------------------------*/
/* Return Disk Status */
DSTATUS disk_status (
BYTE pdrv /* Physical drive nmuber (0..) */
)
{
DSTATUS stat;
switch (pdrv) {
case MSDLUN0:
stat = 0;
/* It is initialized externally, just reads the status.*/
if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
stat |= STA_NOINIT;
return stat;
}
return STA_NOINIT;
}
/*-----------------------------------------------------------------------*/
/* Read Sector(s) */
DRESULT disk_read (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address (LBA) */
UINT count /* Number of sectors to read (1..255) */
)
{
switch (pdrv) {
case MSDLUN0:
/* It is initialized externally, just reads the status.*/
if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
return RES_NOTRDY;
if (usbhmsdLUNRead(&MSBLKD[0], sector, buff, count))
return RES_ERROR;
return RES_OK;
}
return RES_PARERR;
}
/*-----------------------------------------------------------------------*/
/* Write Sector(s) */
#if _USE_WRITE
DRESULT disk_write (
BYTE pdrv, /* Physical drive nmuber (0..) */
const BYTE *buff, /* Data to be written */
DWORD sector, /* Sector address (LBA) */
UINT count /* Number of sectors to write (1..255) */
)
{
switch (pdrv) {
case MSDLUN0:
/* It is initialized externally, just reads the status.*/
if (blkGetDriverState(&MSBLKD[0]) != BLK_READY)
return RES_NOTRDY;
if (usbhmsdLUNWrite(&MSBLKD[0], sector, buff, count))
return RES_ERROR;
return RES_OK;
}
return RES_PARERR;
}
#endif /* _USE_WRITE */
/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
#if _USE_IOCTL
DRESULT disk_ioctl (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
switch (pdrv) {
case MSDLUN0:
switch (cmd) {
case CTRL_SYNC:
return RES_OK;
case GET_SECTOR_COUNT:
*((DWORD *)buff) = MSBLKD[0].info.blk_num;
return RES_OK;
case GET_SECTOR_SIZE:
*((WORD *)buff) = MSBLKD[0].info.blk_size;
return RES_OK;
default:
return RES_PARERR;
}
}
return RES_PARERR;
}
#endif /* _USE_IOCTL */
DWORD get_fattime(void) {
return ((uint32_t)0 | (1 << 16)) | (1 << 21); /* wrong but valid time */
}
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