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/**
******************************************************************************
* @file usbh_diskio.c
* @author MCD Application Team
* @brief USB Host Disk I/O driver (without internal DMA).
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* 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 */
};
/* 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;
}
/**
* @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;
}
/**
* @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 */
/**
* @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 */