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circuitpython/stmhal/usbhost/Class/MSC/Src/usbh_msc.c
Dave Hylands dd38d90724 Initial checkin with STM HAL 
This compiles and links, but hasn't been tested on a board
yet and even if it was run, it doesn't currently do anything.
2014-03-11 23:55:41 -07:00

796 lines
24 KiB
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/**
******************************************************************************
* @file usbh_msc.c
* @author MCD Application Team
* @version V3.0.0
* @date 18-February-2014
* @brief This file implements the MSC class driver functions
* ===================================================================
* MSC Class Description
* ===================================================================
* This module manages the MSC class V1.0 following the "Universal
* Serial Bus Mass Storage Class (MSC) Bulk-Only Transport (BOT) Version 1.0
* Sep. 31, 1999".
* This driver implements the following aspects of the specification:
* - Bulk-Only Transport protocol
* - Subclass : SCSI transparent command set (ref. SCSI Primary Commands - 3 (SPC-3))
*
* @endverbatim
*
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT 2014 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 "usbh_msc.h"
#include "usbh_msc_bot.h"
#include "usbh_msc_scsi.h"
/** @addtogroup USBH_LIB
* @{
*/
/** @addtogroup USBH_CLASS
* @{
*/
/** @addtogroup USBH_MSC_CLASS
* @{
*/
/** @defgroup USBH_MSC_CORE
* @brief This file includes the mass storage related functions
* @{
*/
/** @defgroup USBH_MSC_CORE_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_CORE_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_CORE_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_CORE_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_CORE_Private_FunctionPrototypes
* @{
*/
static USBH_StatusTypeDef USBH_MSC_InterfaceInit (USBH_HandleTypeDef *phost);
static USBH_StatusTypeDef USBH_MSC_InterfaceDeInit (USBH_HandleTypeDef *phost);
static USBH_StatusTypeDef USBH_MSC_Process(USBH_HandleTypeDef *phost);
static USBH_StatusTypeDef USBH_MSC_ClassRequest(USBH_HandleTypeDef *phost);
static USBH_StatusTypeDef USBH_MSC_SOFProcess(USBH_HandleTypeDef *phost);
static USBH_StatusTypeDef USBH_MSC_RdWrProcess(USBH_HandleTypeDef *phost, uint8_t lun);
USBH_ClassTypeDef USBH_msc =
{
"MSC",
USB_MSC_CLASS,
USBH_MSC_InterfaceInit,
USBH_MSC_InterfaceDeInit,
USBH_MSC_ClassRequest,
USBH_MSC_Process,
USBH_MSC_SOFProcess,
NULL,
};
/**
* @}
*/
/** @defgroup USBH_MSC_CORE_Exported_Variables
* @{
*/
/**
* @}
*/
/** @defgroup USBH_MSC_CORE_Private_Functions
* @{
*/
/**
* @brief USBH_MSC_InterfaceInit
* The function init the MSC class.
* @param phost: Host handle
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_MSC_InterfaceInit (USBH_HandleTypeDef *phost)
{
uint8_t interface = 0;
USBH_StatusTypeDef status = USBH_FAIL ;
MSC_HandleTypeDef *MSC_Handle;
interface = USBH_FindInterface(phost, phost->pActiveClass->ClassCode, MSC_TRANSPARENT, MSC_BOT);
if(interface == 0xFF) /* Not Valid Interface */
{
USBH_DbgLog ("Cannot Find the interface for %s class.", phost->pActiveClass->Name);
status = USBH_FAIL;
}
else
{
USBH_SelectInterface (phost, interface);
phost->pActiveClass->pData = (MSC_HandleTypeDef *)USBH_malloc (sizeof(MSC_HandleTypeDef));
MSC_Handle = phost->pActiveClass->pData;
if(phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[0].bEndpointAddress & 0x80)
{
MSC_Handle->InEp = (phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[0].bEndpointAddress);
MSC_Handle->InEpSize = phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[0].wMaxPacketSize;
}
else
{
MSC_Handle->OutEp = (phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[0].bEndpointAddress);
MSC_Handle->OutEpSize = phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[0].wMaxPacketSize;
}
if(phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[1].bEndpointAddress & 0x80)
{
MSC_Handle->InEp = (phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[1].bEndpointAddress);
MSC_Handle->InEpSize = phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[1].wMaxPacketSize;
}
else
{
MSC_Handle->OutEp = (phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[1].bEndpointAddress);
MSC_Handle->OutEpSize = phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].Ep_Desc[1].wMaxPacketSize;
}
MSC_Handle->current_lun = 0;
MSC_Handle->rw_lun = 0;
MSC_Handle->state = MSC_INIT;
MSC_Handle->error = MSC_OK;
MSC_Handle->req_state = MSC_REQ_IDLE;
MSC_Handle->OutPipe = USBH_AllocPipe(phost, MSC_Handle->OutEp);
MSC_Handle->InPipe = USBH_AllocPipe(phost, MSC_Handle->InEp);
USBH_MSC_BOT_Init(phost);
/* De-Initialize LUNs information */
USBH_memset(MSC_Handle->unit, 0, sizeof(MSC_Handle->unit));
/* Open the new channels */
USBH_OpenPipe (phost,
MSC_Handle->OutPipe,
MSC_Handle->OutEp,
phost->device.address,
phost->device.speed,
USB_EP_TYPE_BULK,
MSC_Handle->OutEpSize);
USBH_OpenPipe (phost,
MSC_Handle->InPipe,
MSC_Handle->InEp,
phost->device.address,
phost->device.speed,
USB_EP_TYPE_BULK,
MSC_Handle->InEpSize);
USBH_LL_SetToggle (phost, MSC_Handle->InPipe,0);
USBH_LL_SetToggle (phost, MSC_Handle->OutPipe,0);
status = USBH_OK;
}
return status;
}
/**
* @brief USBH_MSC_InterfaceDeInit
* The function DeInit the Pipes used for the MSC class.
* @param phost: Host handle
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_InterfaceDeInit (USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if ( MSC_Handle->OutPipe)
{
USBH_ClosePipe(phost, MSC_Handle->OutPipe);
USBH_FreePipe (phost, MSC_Handle->OutPipe);
MSC_Handle->OutPipe = 0; /* Reset the Channel as Free */
}
if ( MSC_Handle->InPipe)
{
USBH_ClosePipe(phost, MSC_Handle->InPipe);
USBH_FreePipe (phost, MSC_Handle->InPipe);
MSC_Handle->InPipe = 0; /* Reset the Channel as Free */
}
if(phost->pActiveClass->pData)
{
USBH_free (phost->pActiveClass->pData);
phost->pActiveClass->pData = 0;
}
return USBH_OK;
}
/**
* @brief USBH_MSC_ClassRequest
* The function is responsible for handling Standard requests
* for MSC class.
* @param phost: Host handle
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_MSC_ClassRequest(USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
USBH_StatusTypeDef status = USBH_BUSY;
uint8_t i;
/* Switch MSC REQ state machine */
switch (MSC_Handle->req_state)
{
case MSC_REQ_IDLE:
case MSC_REQ_GET_MAX_LUN:
/* Issue GetMaxLUN request */
if(USBH_MSC_BOT_REQ_GetMaxLUN(phost, (uint8_t *)&MSC_Handle->max_lun) == USBH_OK )
{
MSC_Handle->max_lun = (uint8_t )(MSC_Handle->max_lun) + 1;
USBH_UsrLog ("Number of supported LUN: %lu", (int32_t)(MSC_Handle->max_lun));
for(i = 0; i < MSC_Handle->max_lun; i++)
{
MSC_Handle->unit[i].prev_ready_state = USBH_FAIL;
MSC_Handle->unit[i].state_changed = 0;
}
status = USBH_OK;
}
break;
case MSC_REQ_ERROR :
/* a Clear Feature should be issued here */
if(USBH_ClrFeature(phost, 0x00) == USBH_OK)
{
MSC_Handle->req_state = MSC_Handle->prev_req_state;
}
break;
default:
break;
}
return status;
}
/**
* @brief USBH_MSC_Process
* The function is for managing state machine for MSC data transfers
* @param phost: Host handle
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_MSC_Process(USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
USBH_StatusTypeDef error = USBH_BUSY ;
USBH_StatusTypeDef scsi_status = USBH_BUSY ;
USBH_StatusTypeDef ready_status = USBH_BUSY ;
switch (MSC_Handle->state)
{
case MSC_INIT:
if(MSC_Handle->current_lun < MSC_Handle->max_lun)
{
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_NOT_READY;
/* Switch MSC REQ state machine */
switch (MSC_Handle->unit[MSC_Handle->current_lun].state)
{
case MSC_INIT:
USBH_UsrLog ("LUN #%d: ", MSC_Handle->current_lun);
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_READ_INQUIRY;
MSC_Handle->timer = phost->Timer + 10000;
case MSC_READ_INQUIRY:
scsi_status = USBH_MSC_SCSI_Inquiry(phost, MSC_Handle->current_lun, &MSC_Handle->unit[MSC_Handle->current_lun].inquiry);
if( scsi_status == USBH_OK)
{
USBH_UsrLog ("Inquiry Vendor : %s", MSC_Handle->unit[MSC_Handle->current_lun].inquiry.vendor_id);
USBH_UsrLog ("Inquiry Product : %s", MSC_Handle->unit[MSC_Handle->current_lun].inquiry.product_id);
USBH_UsrLog ("Inquiry Version : %s", MSC_Handle->unit[MSC_Handle->current_lun].inquiry.revision_id);
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_TEST_UNIT_READY;
}
if( scsi_status == USBH_FAIL)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_REQUEST_SENSE;
}
else if(scsi_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_IDLE;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_ERROR;
}
break;
case MSC_TEST_UNIT_READY:
ready_status = USBH_MSC_SCSI_TestUnitReady(phost, MSC_Handle->current_lun);
if( ready_status == USBH_OK)
{
if( MSC_Handle->unit[MSC_Handle->current_lun].prev_ready_state != USBH_OK)
{
MSC_Handle->unit[MSC_Handle->current_lun].state_changed = 1;
USBH_UsrLog ("Mass Storage Device ready");
}
else
{
MSC_Handle->unit[MSC_Handle->current_lun].state_changed = 0;
}
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_READ_CAPACITY10;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_OK;
MSC_Handle->unit[MSC_Handle->current_lun].prev_ready_state = USBH_OK;
}
if( ready_status == USBH_FAIL)
{
/* Media not ready, so try to check again during 10s */
if( MSC_Handle->unit[MSC_Handle->current_lun].prev_ready_state != USBH_FAIL)
{
MSC_Handle->unit[MSC_Handle->current_lun].state_changed = 1;
USBH_UsrLog ("Mass Storage Device NOT ready");
}
else
{
MSC_Handle->unit[MSC_Handle->current_lun].state_changed = 0;
}
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_REQUEST_SENSE;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_NOT_READY;
MSC_Handle->unit[MSC_Handle->current_lun].prev_ready_state = USBH_FAIL;
}
else if(ready_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_IDLE;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_ERROR;
}
break;
case MSC_READ_CAPACITY10:
scsi_status = USBH_MSC_SCSI_ReadCapacity(phost,MSC_Handle->current_lun, &MSC_Handle->unit[MSC_Handle->current_lun].capacity) ;
if(scsi_status == USBH_OK)
{
if(MSC_Handle->unit[MSC_Handle->current_lun].state_changed == 1)
{
USBH_UsrLog ("Mass Storage Device capacity : %lu MB", \
(int32_t)((MSC_Handle->unit[MSC_Handle->current_lun].capacity.block_nbr * MSC_Handle->unit[MSC_Handle->current_lun].capacity.block_size)/1024/1024));
USBH_UsrLog ("Block number : %lu", (int32_t)(MSC_Handle->unit[MSC_Handle->current_lun].capacity.block_nbr));
USBH_UsrLog ("Block Size : %lu", (int32_t)(MSC_Handle->unit[MSC_Handle->current_lun].capacity.block_size));
}
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_IDLE;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_OK;
MSC_Handle->current_lun++;
}
else if( scsi_status == USBH_FAIL)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_REQUEST_SENSE;
}
else if(scsi_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_IDLE;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_ERROR;
}
break;
case MSC_REQUEST_SENSE:
scsi_status = USBH_MSC_SCSI_RequestSense(phost, MSC_Handle->current_lun, &MSC_Handle->unit[MSC_Handle->current_lun].sense);
if( scsi_status == USBH_OK)
{
if((MSC_Handle->unit[MSC_Handle->current_lun].sense.key == SCSI_SENSE_KEY_UNIT_ATTENTION) ||
(MSC_Handle->unit[MSC_Handle->current_lun].sense.key == SCSI_SENSE_KEY_NOT_READY) )
{
if(phost->Timer <= MSC_Handle->timer)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_TEST_UNIT_READY;
break;
}
}
USBH_UsrLog ("Sense Key : %x", MSC_Handle->unit[MSC_Handle->current_lun].sense.key);
USBH_UsrLog ("Additional Sense Code : %x", MSC_Handle->unit[MSC_Handle->current_lun].sense.asc);
USBH_UsrLog ("Additional Sense Code Qualifier: %x", MSC_Handle->unit[MSC_Handle->current_lun].sense.ascq);
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_IDLE;
MSC_Handle->current_lun++;
}
if( scsi_status == USBH_FAIL)
{
USBH_UsrLog ("Mass Storage Device NOT ready");
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_UNRECOVERED_ERROR;
}
else if(scsi_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[MSC_Handle->current_lun].state = MSC_IDLE;
MSC_Handle->unit[MSC_Handle->current_lun].error = MSC_ERROR;
}
break;
case MSC_UNRECOVERED_ERROR:
MSC_Handle->current_lun++;
break;
default:
break;
}
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CLASS_EVENT, 0);
#endif
}
else
{
MSC_Handle->current_lun = 0;
MSC_Handle->state = MSC_IDLE;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CLASS_EVENT, 0);
#endif
phost->pUser(phost, HOST_USER_CLASS_ACTIVE);
}
break;
case MSC_IDLE:
error = USBH_OK;
break;
default:
break;
}
return error;
}
/**
* @brief USBH_MSC_SOFProcess
* The function is for SOF state
* @param phost: Host handle
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_MSC_SOFProcess(USBH_HandleTypeDef *phost)
{
return USBH_OK;
}
/**
* @brief USBH_MSC_RdWrProcess
* The function is for managing state machine for MSC I/O Process
* @param phost: Host handle
* @param lun: logical Unit Number
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_MSC_RdWrProcess(USBH_HandleTypeDef *phost, uint8_t lun)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
USBH_StatusTypeDef error = USBH_BUSY ;
USBH_StatusTypeDef scsi_status = USBH_BUSY ;
/* Switch MSC REQ state machine */
switch (MSC_Handle->unit[lun].state)
{
case MSC_READ:
scsi_status = USBH_MSC_SCSI_Read(phost,lun, 0, NULL, 0) ;
if(scsi_status == USBH_OK)
{
MSC_Handle->unit[lun].state = MSC_IDLE;
error = USBH_OK;
}
else if( scsi_status == USBH_FAIL)
{
MSC_Handle->unit[lun].state = MSC_REQUEST_SENSE;
}
else if(scsi_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[lun].state = MSC_UNRECOVERED_ERROR;
error = USBH_FAIL;
}
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CLASS_EVENT, 0);
#endif
break;
case MSC_WRITE:
scsi_status = USBH_MSC_SCSI_Write(phost,lun, 0, NULL, 0) ;
if(scsi_status == USBH_OK)
{
MSC_Handle->unit[lun].state = MSC_IDLE;
error = USBH_OK;
}
else if( scsi_status == USBH_FAIL)
{
MSC_Handle->unit[lun].state = MSC_REQUEST_SENSE;
}
else if(scsi_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[lun].state = MSC_UNRECOVERED_ERROR;
error = USBH_FAIL;
}
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CLASS_EVENT, 0);
#endif
break;
case MSC_REQUEST_SENSE:
scsi_status = USBH_MSC_SCSI_RequestSense(phost, lun, &MSC_Handle->unit[lun].sense);
if( scsi_status == USBH_OK)
{
USBH_UsrLog ("Sense Key : %x", MSC_Handle->unit[lun].sense.key);
USBH_UsrLog ("Additional Sense Code : %x", MSC_Handle->unit[lun].sense.asc);
USBH_UsrLog ("Additional Sense Code Qualifier: %x", MSC_Handle->unit[lun].sense.ascq);
MSC_Handle->unit[lun].state = MSC_IDLE;
MSC_Handle->unit[lun].error = MSC_ERROR;
error = USBH_FAIL;
}
if( scsi_status == USBH_FAIL)
{
USBH_UsrLog ("Mass Storage Device NOT ready");
}
else if(scsi_status == USBH_UNRECOVERED_ERROR)
{
MSC_Handle->unit[lun].state = MSC_UNRECOVERED_ERROR;
error = USBH_FAIL;
}
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CLASS_EVENT, 0);
#endif
break;
default:
break;
}
return error;
}
/**
* @brief USBH_MSC_IsReady
* The function check if the MSC function is ready
* @param phost: Host handle
* @retval USBH Status
*/
uint8_t USBH_MSC_IsReady (USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if(phost->gState == HOST_CLASS)
{
return (MSC_Handle->state == MSC_IDLE);
}
else
{
return 0;
}
}
/**
* @brief USBH_MSC_GetMaxLUN
* The function return the Max LUN supported
* @param phost: Host handle
* @retval logical Unit Number supported
*/
int8_t USBH_MSC_GetMaxLUN (USBH_HandleTypeDef *phost)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if ((phost->gState != HOST_CLASS) && (MSC_Handle->state == MSC_IDLE))
{
return MSC_Handle->max_lun;
}
return 0xFF;
}
/**
* @brief USBH_MSC_UnitIsReady
* The function check whether a LUN is ready
* @param phost: Host handle
* @param lun: logical Unit Number
* @retval Lun status (0: not ready / 1: ready)
*/
uint8_t USBH_MSC_UnitIsReady (USBH_HandleTypeDef *phost, uint8_t lun)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if(phost->gState == HOST_CLASS)
{
return (MSC_Handle->unit[lun].error == MSC_OK);
}
else
{
return 0;
}
}
/**
* @brief USBH_MSC_GetLUNInfo
* The function return a LUN information
* @param phost: Host handle
* @param lun: logical Unit Number
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_GetLUNInfo(USBH_HandleTypeDef *phost, uint8_t lun, MSC_LUNTypeDef *info)
{
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if(phost->gState == HOST_CLASS)
{
USBH_memcpy(info,&MSC_Handle->unit[lun], sizeof(MSC_LUNTypeDef));
return USBH_OK;
}
else
{
return USBH_FAIL;
}
}
/**
* @brief USBH_MSC_Read
* The function performs a Read operation
* @param phost: Host handle
* @param lun: logical Unit Number
* @param address: sector address
* @param pbuf: pointer to data
* @param length: number of sector to read
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_Read(USBH_HandleTypeDef *phost,
uint8_t lun,
uint32_t address,
uint8_t *pbuf,
uint32_t length)
{
uint32_t timeout;
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if ((phost->device.is_connected == 0) ||
(phost->gState != HOST_CLASS) ||
(MSC_Handle->unit[lun].state != MSC_IDLE))
{
return USBH_FAIL;
}
MSC_Handle->state = MSC_READ;
MSC_Handle->unit[lun].state = MSC_READ;
MSC_Handle->rw_lun = lun;
USBH_MSC_SCSI_Read(phost,
lun,
address,
pbuf,
length);
timeout = phost->Timer + (10000 * length);
while (USBH_MSC_RdWrProcess(phost, lun) == USBH_BUSY)
{
if((phost->Timer > timeout) || (phost->device.is_connected == 0))
{
MSC_Handle->state = MSC_IDLE;
return USBH_FAIL;
}
}
MSC_Handle->state = MSC_IDLE;
return USBH_OK;
}
/**
* @brief USBH_MSC_Write
* The function performs a Write operation
* @param phost: Host handle
* @param lun: logical Unit Number
* @param address: sector address
* @param pbuf: pointer to data
* @param length: number of sector to write
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_MSC_Write(USBH_HandleTypeDef *phost,
uint8_t lun,
uint32_t address,
uint8_t *pbuf,
uint32_t length)
{
uint32_t timeout;
MSC_HandleTypeDef *MSC_Handle = phost->pActiveClass->pData;
if ((phost->device.is_connected == 0) ||
(phost->gState != HOST_CLASS) ||
(MSC_Handle->unit[lun].state != MSC_IDLE))
{
return USBH_FAIL;
}
MSC_Handle->state = MSC_WRITE;
MSC_Handle->unit[lun].state = MSC_WRITE;
MSC_Handle->rw_lun = lun;
USBH_MSC_SCSI_Write(phost,
lun,
address,
pbuf,
length);
timeout = phost->Timer + (10000 * length);
while (USBH_MSC_RdWrProcess(phost, lun) == USBH_BUSY)
{
if((phost->Timer > timeout) || (phost->device.is_connected == 0))
{
MSC_Handle->state = MSC_IDLE;
return USBH_FAIL;
}
}
MSC_Handle->state = MSC_IDLE;
return USBH_OK;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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