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/**
******************************************************************************
* @file usbh_msc_bot.c
* @author MCD Application Team
* @brief This file includes the BOT protocol related functions
******************************************************************************
* @attention
*
* Copyright (c) 2015 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.
*
******************************************************************************
*/
/* BSPDependencies
- "stm32xxxxx_{eval}{discovery}{nucleo_144}.c"
- "stm32xxxxx_{eval}{discovery}_io.c"
- "stm32xxxxx_{eval}{discovery}{adafruit}_lcd.c"
- "stm32xxxxx_{eval}{discovery}_sdram.c"
EndBSPDependencies */
/* Includes ------------------------------------------------------------------*/
#include "usbh_msc_bot.h"
#include "usbh_msc.h"
/** @addtogroup USBH_LIB
* @{
*/
/** @addtogroup USBH_CLASS
* @{
*/
/** @addtogroup USBH_MSC_CLASS
* @{
*/
/** @defgroup USBH_MSC_BOT
* @brief This file includes the mass storage related functions
* @{
*/
/** @defgroup USBH_MSC_BOT_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_BOT_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_BOT_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_BOT_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_BOT_Private_FunctionPrototypes
* @{
*/
static USBH_StatusTypeDef USBH_MSC_BOT_Abort(USBH_HandleTypeDef *phost, uint8_t lun, uint8_t dir);
static BOT_CSWStatusTypeDef USBH_MSC_DecodeCSW(USBH_HandleTypeDef *phost);
/**
* @}
*/
/** @defgroup USBH_MSC_BOT_Exported_Variables
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_BOT_Private_Functions
* @{
*/
/**
* @brief USBH_MSC_BOT_REQ_Reset
* The function the MSC BOT Reset request.
* @param phost: Host handle
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_BOT_REQ_Reset(USBH_HandleTypeDef *phost)
{
phost->Control.setup.b.bmRequestType = USB_H2D | USB_REQ_TYPE_CLASS
| USB_REQ_RECIPIENT_INTERFACE;
phost->Control.setup.b.bRequest = USB_REQ_BOT_RESET;
phost->Control.setup.b.wValue.w = 0U;
phost->Control.setup.b.wIndex.w = 0U;
phost->Control.setup.b.wLength.w = 0U;
return USBH_CtlReq(phost, NULL, 0U);
}
/**
* @brief USBH_MSC_BOT_REQ_GetMaxLUN
* The function the MSC BOT GetMaxLUN request.
* @param phost: Host handle
* @param Maxlun: pointer to Maxlun variable
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_BOT_REQ_GetMaxLUN(USBH_HandleTypeDef *phost, uint8_t *Maxlun)
{
phost->Control.setup.b.bmRequestType = USB_D2H | USB_REQ_TYPE_CLASS
| USB_REQ_RECIPIENT_INTERFACE;
phost->Control.setup.b.bRequest = USB_REQ_GET_MAX_LUN;
phost->Control.setup.b.wValue.w = 0U;
phost->Control.setup.b.wIndex.w = 0U;
phost->Control.setup.b.wLength.w = 1U;
return USBH_CtlReq(phost, Maxlun, 1U);
}
/**
* @brief USBH_MSC_BOT_Init
* The function Initializes the BOT protocol.
* @param phost: Host handle
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_BOT_Init(USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = (MSC_HandleTypeDef *) phost->pActiveClass->pData;
MSC_Handle->hbot.cbw.field.Signature = BOT_CBW_SIGNATURE;
MSC_Handle->hbot.cbw.field.Tag = BOT_CBW_TAG;
MSC_Handle->hbot.state = BOT_SEND_CBW;
MSC_Handle->hbot.cmd_state = BOT_CMD_SEND;
return USBH_OK;
}
/**
* @brief USBH_MSC_BOT_Process
* The function handle the BOT protocol.
* @param phost: Host handle
* @param lun: Logical Unit Number
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_BOT_Process(USBH_HandleTypeDef *phost, uint8_t lun)
{
USBH_StatusTypeDef status = USBH_BUSY;
USBH_StatusTypeDef error = USBH_BUSY;
BOT_CSWStatusTypeDef CSW_Status = BOT_CSW_CMD_FAILED;
USBH_URBStateTypeDef URB_Status = USBH_URB_IDLE;
MSC_HandleTypeDef *MSC_Handle = (MSC_HandleTypeDef *) phost->pActiveClass->pData;
uint8_t toggle = 0U;
switch (MSC_Handle->hbot.state)
{
case BOT_SEND_CBW:
MSC_Handle->hbot.cbw.field.LUN = lun;
MSC_Handle->hbot.state = BOT_SEND_CBW_WAIT;
(void)USBH_BulkSendData(phost, MSC_Handle->hbot.cbw.data,
BOT_CBW_LENGTH, MSC_Handle->OutPipe, 1U);
break;
case BOT_SEND_CBW_WAIT:
URB_Status = USBH_LL_GetURBState(phost, MSC_Handle->OutPipe);
if (URB_Status == USBH_URB_DONE)
{
if (MSC_Handle->hbot.cbw.field.DataTransferLength != 0U)
{
/* If there is Data Transfer Stage */
if (((MSC_Handle->hbot.cbw.field.Flags) & USB_REQ_DIR_MASK) == USB_D2H)
{
/* Data Direction is IN */
MSC_Handle->hbot.state = BOT_DATA_IN;
}
else
{
/* Data Direction is OUT */
MSC_Handle->hbot.state = BOT_DATA_OUT;
}
}
else
{
/* If there is NO Data Transfer Stage */
MSC_Handle->hbot.state = BOT_RECEIVE_CSW;
}
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else if (URB_Status == USBH_URB_NOTREADY)
{
/* Re-send CBW */
MSC_Handle->hbot.state = BOT_SEND_CBW;
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else
{
if (URB_Status == USBH_URB_STALL)
{
MSC_Handle->hbot.state = BOT_ERROR_OUT;
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
}
break;
case BOT_DATA_IN:
/* Send first packet */
(void)USBH_BulkReceiveData(phost, MSC_Handle->hbot.pbuf,
MSC_Handle->InEpSize, MSC_Handle->InPipe);
MSC_Handle->hbot.state = BOT_DATA_IN_WAIT;
break;
case BOT_DATA_IN_WAIT:
URB_Status = USBH_LL_GetURBState(phost, MSC_Handle->InPipe);
if (URB_Status == USBH_URB_DONE)
{
/* Adjust Data pointer and data length */
if (MSC_Handle->hbot.cbw.field.DataTransferLength > MSC_Handle->InEpSize)
{
MSC_Handle->hbot.pbuf += MSC_Handle->InEpSize;
MSC_Handle->hbot.cbw.field.DataTransferLength -= MSC_Handle->InEpSize;
}
else
{
MSC_Handle->hbot.cbw.field.DataTransferLength = 0U;
}
/* More Data To be Received */
if (MSC_Handle->hbot.cbw.field.DataTransferLength > 0U)
{
/* Send next packet */
(void)USBH_BulkReceiveData(phost, MSC_Handle->hbot.pbuf,
MSC_Handle->InEpSize, MSC_Handle->InPipe);
}
else
{
/* If value was 0, and successful transfer, then change the state */
MSC_Handle->hbot.state = BOT_RECEIVE_CSW;
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
}
else if (URB_Status == USBH_URB_STALL)
{
/* This is Data IN Stage STALL Condition */
MSC_Handle->hbot.state = BOT_ERROR_IN;
/* Refer to USB Mass-Storage Class : BOT (www.usb.org)
6.7.2 Host expects to receive data from the device
3. On a STALL condition receiving data, then:
The host shall accept the data received.
The host shall clear the Bulk-In pipe.
4. The host shall attempt to receive a CSW.*/
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else
{
}
break;
case BOT_DATA_OUT:
(void)USBH_BulkSendData(phost, MSC_Handle->hbot.pbuf,
MSC_Handle->OutEpSize, MSC_Handle->OutPipe, 1U);
MSC_Handle->hbot.state = BOT_DATA_OUT_WAIT;
break;
case BOT_DATA_OUT_WAIT:
URB_Status = USBH_LL_GetURBState(phost, MSC_Handle->OutPipe);
if (URB_Status == USBH_URB_DONE)
{
/* Adjust Data pointer and data length */
if (MSC_Handle->hbot.cbw.field.DataTransferLength > MSC_Handle->OutEpSize)
{
MSC_Handle->hbot.pbuf += MSC_Handle->OutEpSize;
MSC_Handle->hbot.cbw.field.DataTransferLength -= MSC_Handle->OutEpSize;
}
else
{
MSC_Handle->hbot.cbw.field.DataTransferLength = 0U;
}
/* More Data To be Sent */
if (MSC_Handle->hbot.cbw.field.DataTransferLength > 0U)
{
(void)USBH_BulkSendData(phost, MSC_Handle->hbot.pbuf,
MSC_Handle->OutEpSize, MSC_Handle->OutPipe, 1U);
}
else
{
/* If value was 0, and successful transfer, then change the state */
MSC_Handle->hbot.state = BOT_RECEIVE_CSW;
}
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else if (URB_Status == USBH_URB_NOTREADY)
{
/* Resend same data */
MSC_Handle->hbot.state = BOT_DATA_OUT;
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else if (URB_Status == USBH_URB_STALL)
{
MSC_Handle->hbot.state = BOT_ERROR_OUT;
/* Refer to USB Mass-Storage Class : BOT (www.usb.org)
6.7.3 Ho - Host expects to send data to the device
3. On a STALL condition sending data, then:
" The host shall clear the Bulk-Out pipe.
4. The host shall attempt to receive a CSW.
*/
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else
{
}
break;
case BOT_RECEIVE_CSW:
(void)USBH_BulkReceiveData(phost, MSC_Handle->hbot.csw.data,
BOT_CSW_LENGTH, MSC_Handle->InPipe);
MSC_Handle->hbot.state = BOT_RECEIVE_CSW_WAIT;
break;
case BOT_RECEIVE_CSW_WAIT:
URB_Status = USBH_LL_GetURBState(phost, MSC_Handle->InPipe);
/* Decode CSW */
if (URB_Status == USBH_URB_DONE)
{
MSC_Handle->hbot.state = BOT_SEND_CBW;
MSC_Handle->hbot.cmd_state = BOT_CMD_SEND;
CSW_Status = USBH_MSC_DecodeCSW(phost);
if (CSW_Status == BOT_CSW_CMD_PASSED)
{
status = USBH_OK;
}
else
{
status = USBH_FAIL;
}
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else if (URB_Status == USBH_URB_STALL)
{
MSC_Handle->hbot.state = BOT_ERROR_IN;
#if (USBH_USE_OS == 1U)
phost->os_msg = (uint32_t)USBH_URB_EVENT;
#if (osCMSIS < 0x20000U)
(void)osMessagePut(phost->os_event, phost->os_msg, 0U);
#else
(void)osMessageQueuePut(phost->os_event, &phost->os_msg, 0U, 0U);
#endif
#endif
}
else
{
}
break;
case BOT_ERROR_IN:
error = USBH_MSC_BOT_Abort(phost, lun, BOT_DIR_IN);
if (error == USBH_OK)
{
MSC_Handle->hbot.state = BOT_RECEIVE_CSW;
}
else if (error == USBH_UNRECOVERED_ERROR)
{
/* This means that there is a STALL Error limit, Do Reset Recovery */
MSC_Handle->hbot.state = BOT_UNRECOVERED_ERROR;
}
else
{
}
break;
case BOT_ERROR_OUT:
error = USBH_MSC_BOT_Abort(phost, lun, BOT_DIR_OUT);
if (error == USBH_OK)
{
toggle = USBH_LL_GetToggle(phost, MSC_Handle->OutPipe);
(void)USBH_LL_SetToggle(phost, MSC_Handle->OutPipe, 1U - toggle);
(void)USBH_LL_SetToggle(phost, MSC_Handle->InPipe, 0U);
MSC_Handle->hbot.state = BOT_ERROR_IN;
}
else
{
if (error == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->hbot.state = BOT_UNRECOVERED_ERROR;
}
}
break;
case BOT_UNRECOVERED_ERROR:
status = USBH_MSC_BOT_REQ_Reset(phost);
if (status == USBH_OK)
{
MSC_Handle->hbot.state = BOT_SEND_CBW;
}
break;
default:
break;
}
return status;
}
/**
* @brief USBH_MSC_BOT_Abort
* The function handle the BOT Abort process.
* @param phost: Host handle
* @param lun: Logical Unit Number
* @param dir: direction (0: out / 1 : in)
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_MSC_BOT_Abort(USBH_HandleTypeDef *phost, uint8_t lun, uint8_t dir)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(lun);
USBH_StatusTypeDef status = USBH_FAIL;
MSC_HandleTypeDef *MSC_Handle = (MSC_HandleTypeDef *) phost->pActiveClass->pData;
switch (dir)
{
case BOT_DIR_IN :
/* send ClrFeture on Bulk IN endpoint */
status = USBH_ClrFeature(phost, MSC_Handle->InEp);
break;
case BOT_DIR_OUT :
/*send ClrFeature on Bulk OUT endpoint */
status = USBH_ClrFeature(phost, MSC_Handle->OutEp);
break;
default:
break;
}
return status;
}
/**
* @brief USBH_MSC_BOT_DecodeCSW
* This function decodes the CSW received by the device and updates the
* same to upper layer.
* @param phost: Host handle
* @retval USBH Status
* @notes
* Refer to USB Mass-Storage Class : BOT (www.usb.org)
* 6.3.1 Valid CSW Conditions :
* The host shall consider the CSW valid when:
* 1. dCSWSignature is equal to 53425355h
* 2. the CSW is 13 (Dh) bytes in length,
* 3. dCSWTag matches the dCBWTag from the corresponding CBW.
*/
static BOT_CSWStatusTypeDef USBH_MSC_DecodeCSW(USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = (MSC_HandleTypeDef *) phost->pActiveClass->pData;
BOT_CSWStatusTypeDef status = BOT_CSW_CMD_FAILED;
/*Checking if the transfer length is different than 13*/
if (USBH_LL_GetLastXferSize(phost, MSC_Handle->InPipe) != BOT_CSW_LENGTH)
{
/*(4) Hi > Dn (Host expects to receive data from the device,
Device intends to transfer no data)
(5) Hi > Di (Host expects to receive data from the device,
Device intends to send data to the host)
(9) Ho > Dn (Host expects to send data to the device,
Device intends to transfer no data)
(11) Ho > Do (Host expects to send data to the device,
Device intends to receive data from the host)*/
status = BOT_CSW_PHASE_ERROR;
}
else
{
/* CSW length is Correct */
/* Check validity of the CSW Signature and CSWStatus */
if (MSC_Handle->hbot.csw.field.Signature == BOT_CSW_SIGNATURE)
{
/* Check Condition 1. dCSWSignature is equal to 53425355h */
if (MSC_Handle->hbot.csw.field.Tag == MSC_Handle->hbot.cbw.field.Tag)
{
/* Check Condition 3. dCSWTag matches the dCBWTag from the
corresponding CBW */
if (MSC_Handle->hbot.csw.field.Status == 0U)
{
/* Refer to USB Mass-Storage Class : BOT (www.usb.org)
Hn Host expects no data transfers
Hi Host expects to receive data from the device
Ho Host expects to send data to the device
Dn Device intends to transfer no data
Di Device intends to send data to the host
Do Device intends to receive data from the host
Section 6.7
(1) Hn = Dn (Host expects no data transfers,
Device intends to transfer no data)
(6) Hi = Di (Host expects to receive data from the device,
Device intends to send data to the host)
(12) Ho = Do (Host expects to send data to the device,
Device intends to receive data from the host)
*/
status = BOT_CSW_CMD_PASSED;
}
else if (MSC_Handle->hbot.csw.field.Status == 1U)
{
status = BOT_CSW_CMD_FAILED;
}
else if (MSC_Handle->hbot.csw.field.Status == 2U)
{
/* Refer to USB Mass-Storage Class : BOT (www.usb.org)
Section 6.7
(2) Hn < Di ( Host expects no data transfers,
Device intends to send data to the host)
(3) Hn < Do ( Host expects no data transfers,
Device intends to receive data from the host)
(7) Hi < Di ( Host expects to receive data from the device,
Device intends to send data to the host)
(8) Hi <> Do ( Host expects to receive data from the device,
Device intends to receive data from the host)
(10) Ho <> Di (Host expects to send data to the device,
Di Device intends to send data to the host)
(13) Ho < Do (Host expects to send data to the device,
Device intends to receive data from the host)
*/
status = BOT_CSW_PHASE_ERROR;
}
else
{
}
} /* CSW Tag Matching is Checked */
} /* CSW Signature Correct Checking */
else
{
/* If the CSW Signature is not valid, We sall return the Phase Error to
Upper Layers for Reset Recovery */
status = BOT_CSW_PHASE_ERROR;
}
} /* CSW Length Check*/
return status;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
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