trezor-firmware/embed/trezorhal/usbd_ioreq.c

/**
  ******************************************************************************
  * @file    usbd_ioreq.c
  * @author  MCD Application Team
  * @version V2.4.2
  * @date    11-December-2015
  * @brief   This file provides the IO requests APIs for control endpoints.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2015 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_ioreq.h"

/** @addtogroup STM32_USB_DEVICE_LIBRARY
  * @{
  */


/** @defgroup USBD_IOREQ
  * @brief control I/O requests module
  * @{
  */

/** @defgroup USBD_IOREQ_Private_TypesDefinitions
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_IOREQ_Private_Defines
  * @{
  */

/**
  * @}
  */


/** @defgroup USBD_IOREQ_Private_Macros
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_IOREQ_Private_Variables
  * @{
  */

/**
  * @}
  */


/** @defgroup USBD_IOREQ_Private_FunctionPrototypes
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_IOREQ_Private_Functions
  * @{
  */

/**
* @brief  USBD_CtlSendData
*         send data on the ctl pipe
* @param  pdev: device instance
* @param  buff: pointer to data buffer
* @param  len: length of data to be sent
* @retval status
*/
USBD_StatusTypeDef  USBD_CtlSendData (USBD_HandleTypeDef  *pdev,
                               uint8_t *pbuf,
                               uint16_t len)
{
  /* Set EP0 State */
  pdev->ep0_state          = USBD_EP0_DATA_IN;
  pdev->ep_in[0].total_length = len;
  pdev->ep_in[0].rem_length   = len;
 /* Start the transfer */
  USBD_LL_Transmit (pdev, 0x00, pbuf, len);

  return USBD_OK;
}

/**
* @brief  USBD_CtlContinueSendData
*         continue sending data on the ctl pipe
* @param  pdev: device instance
* @param  buff: pointer to data buffer
* @param  len: length of data to be sent
* @retval status
*/
USBD_StatusTypeDef  USBD_CtlContinueSendData (USBD_HandleTypeDef  *pdev,
                                       uint8_t *pbuf,
                                       uint16_t len)
{
 /* Start the next transfer */
  USBD_LL_Transmit (pdev, 0x00, pbuf, len);

  return USBD_OK;
}

/**
* @brief  USBD_CtlPrepareRx
*         receive data on the ctl pipe
* @param  pdev: device instance
* @param  buff: pointer to data buffer
* @param  len: length of data to be received
* @retval status
*/
USBD_StatusTypeDef  USBD_CtlPrepareRx (USBD_HandleTypeDef  *pdev,
                                  uint8_t *pbuf,
                                  uint16_t len)
{
  /* Set EP0 State */
  pdev->ep0_state = USBD_EP0_DATA_OUT;
  pdev->ep_out[0].total_length = len;
  pdev->ep_out[0].rem_length   = len;
  /* Start the transfer */
  USBD_LL_PrepareReceive (pdev,
                          0,
                          pbuf,
                         len);

  return USBD_OK;
}

/**
* @brief  USBD_CtlContinueRx
*         continue receive data on the ctl pipe
* @param  pdev: device instance
* @param  buff: pointer to data buffer
* @param  len: length of data to be received
* @retval status
*/
USBD_StatusTypeDef  USBD_CtlContinueRx (USBD_HandleTypeDef  *pdev,
                                          uint8_t *pbuf,
                                          uint16_t len)
{

  USBD_LL_PrepareReceive (pdev,
                          0,
                          pbuf,
                          len);
  return USBD_OK;
}
/**
* @brief  USBD_CtlSendStatus
*         send zero lzngth packet on the ctl pipe
* @param  pdev: device instance
* @retval status
*/
USBD_StatusTypeDef  USBD_CtlSendStatus (USBD_HandleTypeDef  *pdev)
{

  /* Set EP0 State */
  pdev->ep0_state = USBD_EP0_STATUS_IN;

 /* Start the transfer */
  USBD_LL_Transmit (pdev, 0x00, NULL, 0);

  return USBD_OK;
}

/**
* @brief  USBD_CtlReceiveStatus
*         receive zero lzngth packet on the ctl pipe
* @param  pdev: device instance
* @retval status
*/
USBD_StatusTypeDef  USBD_CtlReceiveStatus (USBD_HandleTypeDef  *pdev)
{
  /* Set EP0 State */
  pdev->ep0_state = USBD_EP0_STATUS_OUT;

 /* Start the transfer */
  USBD_LL_PrepareReceive ( pdev,
                    0,
                    NULL,
                    0);

  return USBD_OK;
}


/**
* @brief  USBD_GetRxCount
*         returns the received data length
* @param  pdev: device instance
* @param  ep_addr: endpoint address
* @retval Rx Data blength
*/
uint16_t  USBD_GetRxCount (USBD_HandleTypeDef  *pdev , uint8_t ep_addr)
{
  return USBD_LL_GetRxDataSize(pdev, ep_addr);
}

/**
  * @}
  */


/**
  * @}
  */


/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/