408 lines
9.7 KiB
C
408 lines
9.7 KiB
C
/**
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******************************************************************************
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* @file usbd_msc_bot.c
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* @author MCD Application Team
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* @version V2.0.0
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* @date 18-February-2014
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* @brief This file provides all the BOT protocol core functions.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "usbd_msc_bot.h"
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#include "usbd_msc.h"
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#include "usbd_msc_scsi.h"
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#include "usbd_ioreq.h"
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/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
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* @{
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*/
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/** @defgroup MSC_BOT
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* @brief BOT protocol module
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* @{
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*/
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/** @defgroup MSC_BOT_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup MSC_BOT_Private_Defines
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup MSC_BOT_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup MSC_BOT_Private_Variables
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup MSC_BOT_Private_FunctionPrototypes
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* @{
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*/
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static void MSC_BOT_CBW_Decode (USBD_HandleTypeDef *pdev);
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static void MSC_BOT_SendData (USBD_HandleTypeDef *pdev,
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uint8_t* pbuf,
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uint16_t len);
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static void MSC_BOT_Abort(USBD_HandleTypeDef *pdev);
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/**
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* @}
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*/
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/** @defgroup MSC_BOT_Private_Functions
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* @{
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*/
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/**
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* @brief MSC_BOT_Init
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* Initialize the BOT Process
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* @param pdev: device instance
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* @retval None
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*/
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void MSC_BOT_Init (USBD_HandleTypeDef *pdev)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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hmsc->bot_state = USBD_BOT_IDLE;
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hmsc->bot_status = USBD_BOT_STATUS_NORMAL;
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hmsc->scsi_sense_tail = 0;
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hmsc->scsi_sense_head = 0;
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((USBD_StorageTypeDef *)pdev->pUserData)->Init(0);
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USBD_LL_FlushEP(pdev, MSC_EPOUT_ADDR);
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USBD_LL_FlushEP(pdev, MSC_EPIN_ADDR);
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/* Prapare EP to Receive First BOT Cmd */
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USBD_LL_PrepareReceive (pdev,
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MSC_EPOUT_ADDR,
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(uint8_t *)&hmsc->cbw,
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USBD_BOT_CBW_LENGTH);
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}
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/**
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* @brief MSC_BOT_Reset
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* Reset the BOT Machine
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* @param pdev: device instance
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* @retval None
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*/
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void MSC_BOT_Reset (USBD_HandleTypeDef *pdev)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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hmsc->bot_state = USBD_BOT_IDLE;
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hmsc->bot_status = USBD_BOT_STATUS_RECOVERY;
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/* Prapare EP to Receive First BOT Cmd */
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USBD_LL_PrepareReceive (pdev,
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MSC_EPOUT_ADDR,
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(uint8_t *)&hmsc->cbw,
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USBD_BOT_CBW_LENGTH);
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}
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/**
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* @brief MSC_BOT_DeInit
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* Uninitialize the BOT Machine
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* @param pdev: device instance
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* @retval None
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*/
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void MSC_BOT_DeInit (USBD_HandleTypeDef *pdev)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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hmsc->bot_state = USBD_BOT_IDLE;
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}
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/**
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* @brief MSC_BOT_DataIn
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* Handle BOT IN data stage
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* @param pdev: device instance
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* @param epnum: endpoint index
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* @retval None
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*/
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void MSC_BOT_DataIn (USBD_HandleTypeDef *pdev,
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uint8_t epnum)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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switch (hmsc->bot_state)
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{
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case USBD_BOT_DATA_IN:
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if(SCSI_ProcessCmd(pdev,
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hmsc->cbw.bLUN,
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&hmsc->cbw.CB[0]) < 0)
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{
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MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_FAILED);
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}
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break;
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case USBD_BOT_SEND_DATA:
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case USBD_BOT_LAST_DATA_IN:
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MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_PASSED);
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break;
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default:
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break;
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}
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}
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/**
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* @brief MSC_BOT_DataOut
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* Proccess MSC OUT data
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* @param pdev: device instance
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* @param epnum: endpoint index
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* @retval None
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*/
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void MSC_BOT_DataOut (USBD_HandleTypeDef *pdev,
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uint8_t epnum)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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switch (hmsc->bot_state)
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{
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case USBD_BOT_IDLE:
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MSC_BOT_CBW_Decode(pdev);
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break;
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case USBD_BOT_DATA_OUT:
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if(SCSI_ProcessCmd(pdev,
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hmsc->cbw.bLUN,
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&hmsc->cbw.CB[0]) < 0)
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{
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MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_FAILED);
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}
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break;
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default:
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break;
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}
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}
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/**
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* @brief MSC_BOT_CBW_Decode
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* Decode the CBW command and set the BOT state machine accordingtly
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* @param pdev: device instance
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* @retval None
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*/
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static void MSC_BOT_CBW_Decode (USBD_HandleTypeDef *pdev)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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hmsc->csw.dTag = hmsc->cbw.dTag;
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hmsc->csw.dDataResidue = hmsc->cbw.dDataLength;
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if ((USBD_LL_GetRxDataSize (pdev ,MSC_EPOUT_ADDR) != USBD_BOT_CBW_LENGTH) ||
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(hmsc->cbw.dSignature != USBD_BOT_CBW_SIGNATURE)||
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(hmsc->cbw.bLUN > 1) ||
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(hmsc->cbw.bCBLength < 1) ||
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(hmsc->cbw.bCBLength > 16))
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{
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SCSI_SenseCode(pdev,
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hmsc->cbw.bLUN,
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ILLEGAL_REQUEST,
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INVALID_CDB);
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hmsc->bot_status = USBD_BOT_STATUS_ERROR;
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MSC_BOT_Abort(pdev);
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}
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else
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{
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if(SCSI_ProcessCmd(pdev,
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hmsc->cbw.bLUN,
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&hmsc->cbw.CB[0]) < 0)
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{
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if(hmsc->bot_state == USBD_BOT_NO_DATA)
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{
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MSC_BOT_SendCSW (pdev,
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USBD_CSW_CMD_FAILED);
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}
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else
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{
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MSC_BOT_Abort(pdev);
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}
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}
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/*Burst xfer handled internally*/
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else if ((hmsc->bot_state != USBD_BOT_DATA_IN) &&
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(hmsc->bot_state != USBD_BOT_DATA_OUT) &&
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(hmsc->bot_state != USBD_BOT_LAST_DATA_IN))
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{
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if (hmsc->bot_data_length > 0)
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{
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MSC_BOT_SendData(pdev,
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hmsc->bot_data,
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hmsc->bot_data_length);
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}
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else if (hmsc->bot_data_length == 0)
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{
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MSC_BOT_SendCSW (pdev,
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USBD_CSW_CMD_PASSED);
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}
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}
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}
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}
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/**
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* @brief MSC_BOT_SendData
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* Send the requested data
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* @param pdev: device instance
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* @param buf: pointer to data buffer
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* @param len: Data Length
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* @retval None
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*/
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static void MSC_BOT_SendData(USBD_HandleTypeDef *pdev,
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uint8_t* buf,
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uint16_t len)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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len = MIN (hmsc->cbw.dDataLength, len);
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hmsc->csw.dDataResidue -= len;
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hmsc->csw.bStatus = USBD_CSW_CMD_PASSED;
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hmsc->bot_state = USBD_BOT_SEND_DATA;
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USBD_LL_Transmit (pdev, MSC_EPIN_ADDR, buf, len);
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}
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/**
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* @brief MSC_BOT_SendCSW
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* Send the Command Status Wrapper
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* @param pdev: device instance
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* @param status : CSW status
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* @retval None
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*/
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void MSC_BOT_SendCSW (USBD_HandleTypeDef *pdev,
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uint8_t CSW_Status)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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hmsc->csw.dSignature = USBD_BOT_CSW_SIGNATURE;
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hmsc->csw.bStatus = CSW_Status;
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hmsc->bot_state = USBD_BOT_IDLE;
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USBD_LL_Transmit (pdev,
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MSC_EPIN_ADDR,
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(uint8_t *)&hmsc->csw,
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USBD_BOT_CSW_LENGTH);
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/* Prapare EP to Receive next Cmd */
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USBD_LL_PrepareReceive (pdev,
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MSC_EPOUT_ADDR,
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(uint8_t *)&hmsc->cbw,
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USBD_BOT_CBW_LENGTH);
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}
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/**
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* @brief MSC_BOT_Abort
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* Abort the current transfer
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* @param pdev: device instance
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* @retval status
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*/
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static void MSC_BOT_Abort (USBD_HandleTypeDef *pdev)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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if ((hmsc->cbw.bmFlags == 0) &&
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(hmsc->cbw.dDataLength != 0) &&
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(hmsc->bot_status == USBD_BOT_STATUS_NORMAL) )
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{
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USBD_LL_StallEP(pdev, MSC_EPOUT_ADDR );
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}
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USBD_LL_StallEP(pdev, MSC_EPIN_ADDR);
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if(hmsc->bot_status == USBD_BOT_STATUS_ERROR)
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{
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USBD_LL_PrepareReceive (pdev,
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MSC_EPOUT_ADDR,
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(uint8_t *)&hmsc->cbw,
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USBD_BOT_CBW_LENGTH);
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}
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}
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/**
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* @brief MSC_BOT_CplClrFeature
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* Complete the clear feature request
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* @param pdev: device instance
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* @param epnum: endpoint index
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* @retval None
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*/
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void MSC_BOT_CplClrFeature (USBD_HandleTypeDef *pdev, uint8_t epnum)
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{
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USBD_MSC_BOT_HandleTypeDef *hmsc = pdev->pClassData;
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if(hmsc->bot_status == USBD_BOT_STATUS_ERROR )/* Bad CBW Signature */
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{
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USBD_LL_StallEP(pdev, MSC_EPIN_ADDR);
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hmsc->bot_status = USBD_BOT_STATUS_NORMAL;
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}
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else if(((epnum & 0x80) == 0x80) && ( hmsc->bot_status != USBD_BOT_STATUS_RECOVERY))
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{
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MSC_BOT_SendCSW (pdev, USBD_CSW_CMD_FAILED);
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}
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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