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/******************** (C) COPYRIGHT 2015 e-Design Co., Ltd. ********************
File Name : USB_bot.c
Version : STM32_USB Disk Ver 3.4 Author : MCD Application Team & bure
*******************************************************************************/
#include "usb_scsi.h"
#include "usb_regs.h"
#include "usb_mem.h"
#include "usb_conf.h"
#include "usb_bot.h"
#include "usb_prop.h"
u8 Bot_State;
u8 Bulk_Buff[BULK_MAX_PACKET_SIZE]; // Data_ data buffer
u16 Data_Len;
Bulk_Only_CBW CBW;
Bulk_Only_CSW CSW;
u32 SCSI_LBA , SCSI_BlkLen;
/*******************************************************************************
Mass_Storage_In: Mass Storage IN transfer.
*******************************************************************************/
void Mass_Storage_In (void)
{
switch (Bot_State)
{
case BOT_CSW_Send:
case BOT_ERROR:
Bot_State = BOT_IDLE;
SetEPRxStatus(ENDP2, EP_RX_VALID);/* enable the Endpoint to recive the next cmd*/
break;
case BOT_DATA_IN:
switch (CBW.CB[0])
{
case SCSI_READ10:
SCSI_Read10_Cmd(SCSI_LBA , SCSI_BlkLen);
break;
}
break;
case BOT_DATA_IN_LAST:
Set_CSW (CSW_CMD_PASSED, SEND_CSW_ENABLE);
SetEPRxStatus(ENDP2, EP_RX_VALID);
break;
default:
break;
}
}
/*******************************************************************************
Mass_Storage_Out: Mass Storage OUT transfer.
*******************************************************************************/
void Mass_Storage_Out (void)
{
u8 CMD;
CMD = CBW.CB[0];
Data_Len = GetEPRxCount(ENDP2);
PMAToUserBufferCopy(Bulk_Buff, ENDP2_RXADDR, Data_Len);
switch (Bot_State)
{
case BOT_IDLE:
CBW_Decode();
break;
case BOT_DATA_OUT:
if (CMD == SCSI_WRITE10)
{
SCSI_Write10_Cmd(SCSI_LBA , SCSI_BlkLen);
break;
}
Bot_Abort(DIR_OUT);
Set_Scsi_Sense_Data(ILLEGAL_REQUEST, INVALID_FIELED_IN_COMMAND);
Set_CSW (CSW_PHASE_ERROR, SEND_CSW_DISABLE);
break;
default:
Bot_Abort(BOTH_DIR);
Set_Scsi_Sense_Data(ILLEGAL_REQUEST, INVALID_FIELED_IN_COMMAND);
Set_CSW (CSW_PHASE_ERROR, SEND_CSW_DISABLE);
break;
}
}
/*******************************************************************************
CBW_Decode: Decode the received CBW and call the related SCSI command
*******************************************************************************/
void CBW_Decode(void)
{
u32 Counter;
for (Counter = 0; Counter < Data_Len; Counter++)
{
*((u8 *)&CBW + Counter) = Bulk_Buff[Counter];
}
CSW.dTag = CBW.dTag;
CSW.dDataResidue = CBW.dDataLength;
if (Data_Len != BOT_CBW_PACKET_LENGTH)
{
Bot_Abort(BOTH_DIR);
// reset the CBW.dSignature to desible the clear feature until receiving a Mass storage reset
CBW.dSignature = 0;
Set_Scsi_Sense_Data(ILLEGAL_REQUEST, PARAMETER_LIST_LENGTH_ERROR);
Set_CSW (CSW_CMD_FAILED, SEND_CSW_DISABLE);
return;
}
if ((CBW.CB[0] == SCSI_READ10 ) || (CBW.CB[0] == SCSI_WRITE10 ))
{
// Calculate Logical Block Address
SCSI_LBA = (CBW.CB[2] << 24) | (CBW.CB[3] << 16) | (CBW.CB[4] << 8) | CBW.CB[5];
// Calculate the Number of Blocks to transfer
SCSI_BlkLen = (CBW.CB[7] << 8) | CBW.CB[8];
}
if (CBW.dSignature == BOT_CBW_SIGNATURE)
{
// Valid CBW
if ((CBW.bLUN > Max_Lun) || (CBW.bCBLength < 1) || (CBW.bCBLength > 16))
{
Bot_Abort(BOTH_DIR);
Set_Scsi_Sense_Data(ILLEGAL_REQUEST, INVALID_FIELED_IN_COMMAND);
Set_CSW (CSW_CMD_FAILED, SEND_CSW_DISABLE);
}
else
{
switch (CBW.CB[0])
{
case SCSI_REQUEST_SENSE:
SCSI_RequestSense_Cmd ();
break;
case SCSI_INQUIRY:
SCSI_Inquiry_Cmd();
break;
case SCSI_START_STOP_UNIT:
SCSI_Start_Stop_Unit_Cmd();
break;
case SCSI_ALLOW_MEDIUM_REMOVAL:
SCSI_Start_Stop_Unit_Cmd();
break;
case SCSI_MODE_SENSE6:
SCSI_ModeSense6_Cmd ();
break;
case SCSI_MODE_SENSE10:
SCSI_ModeSense10_Cmd ();
break;
case SCSI_READ_FORMAT_CAPACITIES:
SCSI_ReadFormatCapacity_Cmd();
break;
case SCSI_READ_CAPACITY10:
SCSI_ReadCapacity10_Cmd();
break;
case SCSI_TEST_UNIT_READY:
SCSI_TestUnitReady_Cmd();
break;
case SCSI_READ10:
SCSI_Read10_Cmd(SCSI_LBA , SCSI_BlkLen);
break;
case SCSI_WRITE10:
SCSI_Write10_Cmd(SCSI_LBA , SCSI_BlkLen);
break;
case SCSI_VERIFY10:
SCSI_Verify10_Cmd();
break;
//Unsupported command
case SCSI_MODE_SELECT10:
SCSI_Mode_Select10_Cmd();
break;
case SCSI_MODE_SELECT6:
SCSI_Mode_Select6_Cmd();
break;
case SCSI_SEND_DIAGNOSTIC:
SCSI_Send_Diagnostic_Cmd();
break;
case SCSI_READ6:
SCSI_Read6_Cmd();
break;
case SCSI_READ12:
SCSI_Read12_Cmd();
break;
case SCSI_READ16:
SCSI_Read16_Cmd();
break;
case SCSI_READ_CAPACITY16:
SCSI_READ_CAPACITY16_Cmd();
break;
case SCSI_WRITE6:
SCSI_Write6_Cmd();
break;
case SCSI_WRITE12:
SCSI_Write12_Cmd();
break;
case SCSI_WRITE16:
SCSI_Write16_Cmd();
break;
case SCSI_VERIFY12:
SCSI_Verify12_Cmd();
break;
case SCSI_VERIFY16:
SCSI_Verify16_Cmd();
break;
default:
{
Bot_Abort(BOTH_DIR);
Set_Scsi_Sense_Data(ILLEGAL_REQUEST, INVALID_COMMAND);
Set_CSW (CSW_CMD_FAILED, SEND_CSW_DISABLE);
}
}
}
}
else
{
// Invalid CBW
Bot_Abort(BOTH_DIR);
Set_Scsi_Sense_Data(ILLEGAL_REQUEST, INVALID_COMMAND);
Set_CSW (CSW_CMD_FAILED, SEND_CSW_DISABLE);
}
}
/*******************************************************************************
Transfer_Data_Request: Send the request response to the PC HOST.
Input : u8* Data_Address : point to the data to transfer.
u16 Data_Length : the nember of Bytes to transfer.
*******************************************************************************/
void Transfer_Data_Request(u8* Data_Pointer, u16 Data_Len)
{
UserToPMABufferCopy(Data_Pointer, ENDP1_TXADDR, Data_Len);
SetEPTxCount(ENDP1, Data_Len);
SetEPTxStatus(ENDP1, EP_TX_VALID);
Bot_State = BOT_DATA_IN_LAST;
CSW.dDataResidue -= Data_Len;
CSW.bStatus = CSW_CMD_PASSED;
}
/*******************************************************************************
Set_CSW: Set the SCW with the needed fields.
Input : u8 CSW_Status this filed can be CSW_CMD_PASSED,CSW_CMD_FAILED,
or CSW_PHASE_ERROR.
*******************************************************************************/
void Set_CSW (u8 CSW_Status, u8 Send_Permission)
{
CSW.dSignature = BOT_CSW_SIGNATURE;
CSW.bStatus = CSW_Status;
UserToPMABufferCopy(((u8 *)& CSW), ENDP1_TXADDR, CSW_DATA_LENGTH);
SetEPTxCount(ENDP1, CSW_DATA_LENGTH);
Bot_State = BOT_ERROR;
if (Send_Permission){
Bot_State = BOT_CSW_Send;
SetEPTxStatus(ENDP1, EP_TX_VALID);
}
}
/*******************************************************************************
Bot_Abort: Stall the needed Endpoint according to the selected direction.
Input : Endpoint direction IN, OUT or both directions
*******************************************************************************/
void Bot_Abort(u8 Direction)
{
switch (Direction){
case DIR_IN :
SetEPTxStatus(ENDP1, EP_TX_STALL);
break;
case DIR_OUT :
SetEPRxStatus(ENDP2, EP_RX_STALL);
break;
case BOTH_DIR :
SetEPTxStatus(ENDP1, EP_TX_STALL);
SetEPRxStatus(ENDP2, EP_RX_STALL);
break;
default:
break;
}
}
/********************************* END OF FILE ******************************/
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