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circuitpython/stm/lib/usbd_msc_bot.c

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/**
******************************************************************************
* @file usbd_msc_bot.c
* @author MCD Application Team
* @version V1.1.0
* @date 19-March-2012
* @brief This file provides all the BOT protocol core functions.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "usbd_msc_bot.h"
#include "usbd_msc_scsi.h"
#include "usbd_ioreq.h"
#include "usbd_msc_mem.h"
#include "usbd_msc_conf.h"
/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
* @{
*/
/** @defgroup MSC_BOT
* @brief BOT protocol module
* @{
*/
/** @defgroup MSC_BOT_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup MSC_BOT_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup MSC_BOT_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup MSC_BOT_Private_Variables
* @{
*/
uint16_t MSC_BOT_DataLen;
uint8_t MSC_BOT_State;
uint8_t MSC_BOT_Status;
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t MSC_BOT_Data[MSC_MEDIA_PACKET] __ALIGN_END ;
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN MSC_BOT_CBW_TypeDef MSC_BOT_cbw __ALIGN_END ;
#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN MSC_BOT_CSW_TypeDef MSC_BOT_csw __ALIGN_END ;
/**
* @}
*/
/** @defgroup MSC_BOT_Private_FunctionPrototypes
* @{
*/
static void MSC_BOT_CBW_Decode (USB_OTG_CORE_HANDLE *pdev);
static void MSC_BOT_SendData (USB_OTG_CORE_HANDLE *pdev,
uint8_t* pbuf,
uint16_t len);
static void MSC_BOT_Abort(USB_OTG_CORE_HANDLE *pdev);
/**
* @}
*/
/** @defgroup MSC_BOT_Private_Functions
* @{
*/
/**
* @brief MSC_BOT_Init
* Initialize the BOT Process
* @param pdev: device instance
* @retval None
*/
void MSC_BOT_Init (USB_OTG_CORE_HANDLE *pdev)
{
MSC_BOT_State = BOT_IDLE;
MSC_BOT_Status = BOT_STATE_NORMAL;
USBD_STORAGE_fops->Init(0);
DCD_EP_Flush(pdev, MSC_OUT_EP);
DCD_EP_Flush(pdev, MSC_IN_EP);
/* Prapare EP to Receive First BOT Cmd */
DCD_EP_PrepareRx (pdev,
MSC_OUT_EP,
(uint8_t *)&MSC_BOT_cbw,
BOT_CBW_LENGTH);
}
/**
* @brief MSC_BOT_Reset
* Reset the BOT Machine
* @param pdev: device instance
* @retval None
*/
void MSC_BOT_Reset (USB_OTG_CORE_HANDLE *pdev)
{
MSC_BOT_State = BOT_IDLE;
MSC_BOT_Status = BOT_STATE_RECOVERY;
/* Prapare EP to Receive First BOT Cmd */
DCD_EP_PrepareRx (pdev,
MSC_OUT_EP,
(uint8_t *)&MSC_BOT_cbw,
BOT_CBW_LENGTH);
}
/**
* @brief MSC_BOT_DeInit
* Uninitialize the BOT Machine
* @param pdev: device instance
* @retval None
*/
void MSC_BOT_DeInit (USB_OTG_CORE_HANDLE *pdev)
{
MSC_BOT_State = BOT_IDLE;
}
/**
* @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_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;
}
}
/**
* @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);
}
}
}
}
/**
* @brief MSC_BOT_SendData
* Send the requested data
* @param pdev: device instance
* @param buf: pointer to data buffer
* @param len: Data Length
* @retval None
*/
static void MSC_BOT_SendData(USB_OTG_CORE_HANDLE *pdev,
uint8_t* buf,
uint16_t len)
{
len = MIN (MSC_BOT_cbw.dDataLength, len);
MSC_BOT_csw.dDataResidue -= len;
MSC_BOT_csw.bStatus = CSW_CMD_PASSED;
MSC_BOT_State = BOT_SEND_DATA;
DCD_EP_Tx (pdev, MSC_IN_EP, buf, len);
}
/**
* @brief MSC_BOT_SendCSW
* Send the Command Status Wrapper
* @param pdev: device instance
* @param status : CSW status
* @retval None
*/
void MSC_BOT_SendCSW (USB_OTG_CORE_HANDLE *pdev,
uint8_t CSW_Status)
{
MSC_BOT_csw.dSignature = BOT_CSW_SIGNATURE;
MSC_BOT_csw.bStatus = CSW_Status;
MSC_BOT_State = BOT_IDLE;
DCD_EP_Tx (pdev,
MSC_IN_EP,
(uint8_t *)&MSC_BOT_csw,
BOT_CSW_LENGTH);
/* Prapare EP to Receive next Cmd */
DCD_EP_PrepareRx (pdev,
MSC_OUT_EP,
(uint8_t *)&MSC_BOT_cbw,
BOT_CBW_LENGTH);
}
/**
* @brief MSC_BOT_Abort
* Abort the current transfer
* @param pdev: device instance
* @retval status
*/
static void MSC_BOT_Abort (USB_OTG_CORE_HANDLE *pdev)
{
if ((MSC_BOT_cbw.bmFlags == 0) &&
(MSC_BOT_cbw.dDataLength != 0) &&
(MSC_BOT_Status == BOT_STATE_NORMAL) )
{
DCD_EP_Stall(pdev, MSC_OUT_EP );
}
DCD_EP_Stall(pdev, MSC_IN_EP);
if(MSC_BOT_Status == BOT_STATE_ERROR)
{
DCD_EP_PrepareRx (pdev,
MSC_OUT_EP,
(uint8_t *)&MSC_BOT_cbw,
BOT_CBW_LENGTH);
}
}
/**
* @brief MSC_BOT_CplClrFeature
* Complete the clear feature request
* @param pdev: device instance
* @param epnum: endpoint index
* @retval None
*/
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);
}
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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