/**
* @brief MSC_BOT_DataIn
* Handle BOT IN data stage
* @param pdev: device instance
* @param epnum: endpoint index
* @retval None
*/
void MSC_BOT_DataIn (USBD_HandleTypeDef *pdev,
uint8_t epnum)
{
USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
switch (hmsc->bot_state)
{
case USBD_BOT_DATA_IN:
if(SCSI_ProcessCmd(pdev,
hmsc->cbw.bLUN,
&hmsc->cbw.CB[0]) < 0)
{
MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_FAILED);
}
break;
case USBD_BOT_SEND_DATA:
case USBD_BOT_LAST_DATA_IN:
MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_PASSED);
break;
default:
break;
}
}
/**
* @brief MSC_BOT_DataIn
* Handle BOT IN data stage
* @param pdev: device instance
* @param epnum: endpoint index
* @retval None
*/
void MSC_BOT_DataIn (USB_OTG_CORE_HANDLE *pdev,
uint8_t epnum)
{
switch (MSC_BOT_State)
{
case BOT_DATA_IN:
if(SCSI_ProcessCmd(pdev,
MSC_BOT_cbw.bLUN,
&MSC_BOT_cbw.CB[0]) < 0)
{
MSC_BOT_SendCSW (pdev, CSW_CMD_FAILED);
}
break;
case BOT_SEND_DATA:
case BOT_LAST_DATA_IN:
MSC_BOT_SendCSW (pdev, CSW_CMD_PASSED);
break;
default:
break;
}
}
/**
* @brief MSC_BOT_CBW_Decode
* Decode the CBW command and set the BOT state machine accordingtly
* @param pdev: device instance
* @retval None
*/
static void MSC_BOT_CBW_Decode (USBD_HandleTypeDef *pdev)
{
USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
hmsc->csw.dTag = hmsc->cbw.dTag;
hmsc->csw.dDataResidue = hmsc->cbw.dDataLength;
if ((USBD_LL_GetRxDataSize (pdev ,MSC_EPOUT_ADDR) != USBD_BOT_CBW_LENGTH) ||
(hmsc->cbw.dSignature != USBD_BOT_CBW_SIGNATURE)||
(hmsc->cbw.bLUN > 1) ||
(hmsc->cbw.bCBLength < 1) ||
(hmsc->cbw.bCBLength > 16))
{
SCSI_SenseCode(pdev,
hmsc->cbw.bLUN,
ILLEGAL_REQUEST,
INVALID_CDB);
hmsc->bot_status = USBD_BOT_STATUS_ERROR;
MSC_BOT_Abort(pdev);
}
else
{
if(SCSI_ProcessCmd(pdev,
hmsc->cbw.bLUN,
&hmsc->cbw.CB[0]) < 0)
{
if(hmsc->bot_state == USBD_BOT_NO_DATA)
{
MSC_BOT_SendCSW (pdev,
USBD_CSW_CMD_FAILED);
}
else
{
MSC_BOT_Abort(pdev);
}
}
/*Burst xfer handled internally*/
else if ((hmsc->bot_state != USBD_BOT_DATA_IN) &&
(hmsc->bot_state != USBD_BOT_DATA_OUT) &&
(hmsc->bot_state != USBD_BOT_LAST_DATA_IN))
{
if (hmsc->bot_data_length > 0)
{
MSC_BOT_SendData(pdev,
hmsc->bot_data,
hmsc->bot_data_length);
}
else if (hmsc->bot_data_length == 0)
{
MSC_BOT_SendCSW (pdev,
USBD_CSW_CMD_PASSED);
}
}
}
}
/**
* @brief MSC_BOT_DataOut
* Proccess MSC OUT data
* @param pdev: device instance
* @param epnum: endpoint index
* @retval None
*/
void MSC_BOT_DataOut (USBD_HandleTypeDef *pdev,
uint8_t epnum)
{
USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
switch (hmsc->bot_state)
{
case USBD_BOT_IDLE:
MSC_BOT_CBW_Decode(pdev);
break;
case USBD_BOT_DATA_OUT:
if(SCSI_ProcessCmd(pdev,
hmsc->cbw.bLUN,
&hmsc->cbw.CB[0]) < 0)
{
MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_FAILED);
}
break;
default:
break;
}
}
// Handle write process
// input:
// pdev - pointer to the USB device handle
// lun - logical unit number
static int8_t SCSI_ProcessWrite(USBD_HandleTypeDef *pdev, uint8_t lun) {
USBD_MSC_BOT_HandleTypeDef *hmsc = (USBD_MSC_BOT_HandleTypeDef *)pdev->pClassData;
uint32_t len;
len = MIN(hmsc->scsi_blk_len,MSC_MEDIA_PACKET);
if (((USBD_StorageTypeDef *)pdev->pUserData)->Write(lun,hmsc->bot_data,hmsc->scsi_blk_addr / hmsc->scsi_blk_size,len / hmsc->scsi_blk_size) < 0) {
SCSI_SenseCode(pdev,lun,HARDWARE_ERROR,WRITE_FAULT);
return -1;
}
hmsc->scsi_blk_addr += len;
hmsc->scsi_blk_len -= len;
// case 12 : Ho = Do
hmsc->csw.dDataResidue -= len;
if (hmsc->scsi_blk_len == 0) {
MSC_BOT_SendCSW(pdev,USBD_CSW_CMD_PASSED);
} else {
// Prepare endpoint to receive next packet
USBD_LL_PrepareReceive(pdev,MSC_EPOUT_ADDR,hmsc->bot_data,MIN(hmsc->scsi_blk_len,MSC_MEDIA_PACKET));
}
return 0;
}
/**
* @brief MSC_BOT_DataOut
* Proccess MSC OUT data
* @param pdev: device instance
* @param epnum: endpoint index
* @retval None
*/
void MSC_BOT_DataOut (USB_OTG_CORE_HANDLE *pdev,
uint8_t epnum)
{
switch (MSC_BOT_State)
{
case BOT_IDLE:
MSC_BOT_CBW_Decode(pdev);
break;
case BOT_DATA_OUT:
if(SCSI_ProcessCmd(pdev,
MSC_BOT_cbw.bLUN,
&MSC_BOT_cbw.CB[0]) < 0)
{
MSC_BOT_SendCSW (pdev, CSW_CMD_FAILED);
}
break;
default:
break;
}
}
void MSC_BOT_CplClrFeature (USB_OTG_CORE_HANDLE *pdev, uint8_t epnum) {
if(MSC_BOT_Status == BOT_STATE_ERROR ) { /* Bad CBW Signature */
DCD_EP_Stall(pdev, MSC_IN_EP);
MSC_BOT_Status = BOT_STATE_NORMAL;
} else if(((epnum & 0x80) == 0x80) && ( MSC_BOT_Status != BOT_STATE_RECOVERY)) {
MSC_BOT_SendCSW (pdev, CSW_CMD_FAILED);
}
}
void MSC_BOT_CplClrFeature (USBD_HandleTypeDef *pdev, uint8_t epnum)
{
USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
if(hmsc->bot_status == USBD_BOT_STATUS_ERROR )/* Bad CBW Signature */
{
USBD_LL_StallEP(pdev, MSC_EPIN_ADDR);
hmsc->bot_status = USBD_BOT_STATUS_NORMAL;
}
else if(((epnum & 0x80) == 0x80) && ( hmsc->bot_status != USBD_BOT_STATUS_RECOVERY))
{
MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_FAILED);
}
}
/**
* @brief MSC_BOT_CBW_Decode
* Decode the CBW command and set the BOT state machine accordingtly
* @param pdev: device instance
* @retval None
*/
static void MSC_BOT_CBW_Decode (USB_OTG_CORE_HANDLE *pdev)
{
MSC_BOT_csw.dTag = MSC_BOT_cbw.dTag;
MSC_BOT_csw.dDataResidue = MSC_BOT_cbw.dDataLength;
if ((USBD_GetRxCount (pdev ,MSC_OUT_EP) != BOT_CBW_LENGTH) ||
(MSC_BOT_cbw.dSignature != BOT_CBW_SIGNATURE)||
(MSC_BOT_cbw.bLUN > 1) ||
(MSC_BOT_cbw.bCBLength < 1) ||
(MSC_BOT_cbw.bCBLength > 16))
{
SCSI_SenseCode(MSC_BOT_cbw.bLUN,
ILLEGAL_REQUEST,
INVALID_CDB);
MSC_BOT_Status = BOT_STATE_ERROR;
MSC_BOT_Abort(pdev);
}
else
{
if(SCSI_ProcessCmd(pdev,
MSC_BOT_cbw.bLUN,
&MSC_BOT_cbw.CB[0]) < 0)
{
MSC_BOT_Abort(pdev);
}
/*Burst xfer handled internally*/
else if ((MSC_BOT_State != BOT_DATA_IN) &&
(MSC_BOT_State != BOT_DATA_OUT) &&
(MSC_BOT_State != BOT_LAST_DATA_IN))
{
if (MSC_BOT_DataLen > 0)
{
MSC_BOT_SendData(pdev,
MSC_BOT_Data,
MSC_BOT_DataLen);
}
else if (MSC_BOT_DataLen == 0)
{
MSC_BOT_SendCSW (pdev,
CSW_CMD_PASSED);
}
}
}
}
void SCSI_ProcessWriteComplete(uint32_t len) {
SCSI_blk_addr += len;
SCSI_blk_len -= len;
/* case 12 : Ho = Do */
MSC_BOT_csw.dDataResidue -= len;
if (SCSI_blk_len == 0) {
MSC_BOT_SendCSW (cdev, CSW_CMD_PASSED);
} else {
/* Prapare EP to Receive next packet */
DCD_EP_PrepareRx (cdev,
MSC_OUT_EP,
MSC_BOT_Data,
MIN (SCSI_blk_len, MSC_MEDIA_PACKET));
}
}
static int8_t SCSI_ProcessWrite (uint8_t lun)
{
uint32_t len;
len = MIN(SCSI_blk_len , MSC_MEDIA_PACKET);
if(USBD_STORAGE_fops->Write(lun ,
MSC_BOT_Data,
SCSI_blk_addr / SCSI_blk_size,
len / SCSI_blk_size) < 0)
{
SCSI_SenseCode(lun, HARDWARE_ERROR, WRITE_FAULT);
return -1;
}
SCSI_blk_addr += len;
SCSI_blk_len -= len;
/* case 12 : Ho = Do */
MSC_BOT_csw.dDataResidue -= len;
if (SCSI_blk_len == 0)
{
MSC_BOT_SendCSW (cdev, CSW_CMD_PASSED);
}
else
{
/* Prapare EP to Receive next packet */
DCD_EP_PrepareRx (cdev,
MSC_OUT_EP,
MSC_BOT_Data,
MIN (SCSI_blk_len, MSC_MEDIA_PACKET));
}
return 0;
}