/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2025-2026 STMicroelectronics.
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** USBX Component                                                        */
/**                                                                       */
/**   STM32 Controller Driver                                             */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/


/* Include necessary system files.  */

#define UX_SOURCE_CODE
#define UX_HCD_STM32_SOURCE_CODE

#include "ux_api.h"
#include "ux_hcd_stm32.h"
#include "ux_host_stack.h"


static inline VOID _ux_hcd_stm32_request_control_setup(UX_HCD_STM32 *hcd_stm32,
    UX_HCD_STM32_ED *ed, UX_ENDPOINT *endpoint, UX_TRANSFER *transfer_request);

static inline VOID _ux_hcd_stm32_request_control_data(UX_HCD_STM32 *hcd_stm32,
    UX_HCD_STM32_ED *ed, UX_ENDPOINT *endpoint, UX_TRANSFER *transfer_request);

static inline VOID _ux_hcd_stm32_request_control_status(UX_HCD_STM32 *hcd_stm32,
    UX_HCD_STM32_ED *ed, UX_ENDPOINT *endpoint, UX_TRANSFER *transfer_request);


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_hcd_stm32_request_control_transfer              PORTABLE C      */
/*                                                           6.4.1        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*     This function performs a control transfer from a transfer request. */
/*     The USB control transfer is in 3 phases (setup, data, status).     */
/*     This function will chain all phases of the control sequence before */
/*     setting the stm32 endpoint as a candidate for transfer.            */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    hcd_stm32                             Pointer to STM32 controller   */
/*    transfer_request                      Pointer to transfer request   */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_hcd_stm32_regular_td_obtain       Obtain regular TD             */
/*    _ux_host_stack_transfer_request_abort Abort transfer request        */
/*    _ux_utility_memory_allocate           Allocate memory block         */
/*    _ux_utility_memory_free               Release memory block          */
/*    _ux_utility_semaphore_get             Get semaphore                 */
/*    _ux_utility_short_put                 Write 16-bit value            */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    STM32 Controller Driver                                             */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  05-19-2020     Chaoqiong Xiao           Initial Version 6.0           */
/*  01-31-2022     Chaoqiong Xiao           Modified comment(s),          */
/*                                            prefixed UX to MS_TO_TICK,  */
/*                                            refined macros names,       */
/*                                            added standalone support,   */
/*                                            resulting in version 6.1.10 */
/*                                                                        */
/**************************************************************************/
UINT _ux_hcd_stm32_request_control_transfer(UX_HCD_STM32 *hcd_stm32, UX_TRANSFER *transfer_request)
{
#if defined(UX_HOST_STANDALONE)
  UX_INTERRUPT_SAVE_AREA
#else
  UINT                    status;
#endif /* defined(UX_HOST_STANDALONE) */
  UX_ENDPOINT             *endpoint;
  UX_HCD_STM32_ED         *ed;

  /* Get the pointer to the Endpoint.  */
  endpoint = (UX_ENDPOINT *) transfer_request -> ux_transfer_request_endpoint;

  /* Now get the physical ED attached to this endpoint.  */
  ed = endpoint -> ux_endpoint_ed;

#if defined(UX_HOST_STANDALONE)
  UX_DISABLE
  switch(ed -> ux_stm32_ed_status)
  {
  case UX_HCD_STM32_ED_STATUS_ALLOCATED:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_ABORTED:
    /* Setup for SETUP packet.  */
    _ux_hcd_stm32_request_control_setup(hcd_stm32, ed, endpoint, transfer_request);
    UX_RESTORE
    if (ed -> ux_stm32_ed_setup == UX_NULL)
    {
      transfer_request -> ux_transfer_request_completion_code = UX_MEMORY_INSUFFICIENT;
      return(UX_STATE_ERROR);
    }

    return(UX_STATE_WAIT);

  case UX_HCD_STM32_ED_STATUS_CONTROL_SETUP | UX_HCD_STM32_ED_STATUS_TRANSFER_DONE:
    /* Free allocated memory.  */
    _ux_utility_memory_free(ed -> ux_stm32_ed_setup);
    ed -> ux_stm32_ed_setup = UX_NULL;

    /* Restore request information.  */
    transfer_request -> ux_transfer_request_requested_length =
                                            ed -> ux_stm32_ed_saved_length;
    transfer_request -> ux_transfer_request_actual_length = 0;

    /* Check completion code.  */
    if (transfer_request -> ux_transfer_request_completion_code != UX_SUCCESS)
    {
      ed -> ux_stm32_ed_status = UX_HCD_STM32_ED_STATUS_ALLOCATED;
      UX_RESTORE
      return(UX_STATE_NEXT);
    }

    if (ed -> ux_stm32_ed_saved_length)
    {
      /* To data stage.  */
      _ux_hcd_stm32_request_control_data(hcd_stm32, ed, endpoint, transfer_request);
    }
    else
    {
      /* To status stage.  */
      _ux_hcd_stm32_request_control_status(hcd_stm32, ed, endpoint, transfer_request);
    }
    UX_RESTORE
    return(UX_STATE_WAIT);

  case UX_HCD_STM32_ED_STATUS_CONTROL_DATA_IN | UX_HCD_STM32_ED_STATUS_TRANSFER_DONE:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_CONTROL_DATA_OUT | UX_HCD_STM32_ED_STATUS_TRANSFER_DONE:
    /* Check completion code.  */
    if (transfer_request -> ux_transfer_request_completion_code != UX_SUCCESS)
    {
      ed -> ux_stm32_ed_status = UX_HCD_STM32_ED_STATUS_ALLOCATED;
      UX_RESTORE
      return(UX_STATE_NEXT);
    }

    /* Get request actual length for IN transfer.  */
    if (ed -> ux_stm32_ed_dir)
    {
      /* Get the actual transfer length.  */
      transfer_request -> ux_transfer_request_actual_length =
                      HAL_HCD_GetChannelTransferCount(hcd_stm32 -> hcd_handle, ed -> ux_stm32_ed_channel);
    }
    else
    {
      /* For OUT, all data is sent.  */
      transfer_request -> ux_transfer_request_actual_length =
              transfer_request -> ux_transfer_request_requested_length;
    }

    /* To status stage.  */
    _ux_hcd_stm32_request_control_status(hcd_stm32, ed, endpoint, transfer_request);
    UX_RESTORE
    return(UX_STATE_WAIT);

  case UX_HCD_STM32_ED_STATUS_CONTROL_STATUS_IN | UX_HCD_STM32_ED_STATUS_TRANSFER_DONE:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_CONTROL_STATUS_OUT | UX_HCD_STM32_ED_STATUS_TRANSFER_DONE:

    /* All done, reset status.  */
    ed -> ux_stm32_ed_status = UX_HCD_STM32_ED_STATUS_ALLOCATED;

    /* Restore saved things.  */
    transfer_request -> ux_transfer_request_requested_length = ed -> ux_stm32_ed_saved_length;
    transfer_request -> ux_transfer_request_actual_length = ed -> ux_stm32_ed_saved_actual_length;

    UX_RESTORE
    return(UX_STATE_NEXT);

  case UX_HCD_STM32_ED_STATUS_CONTROL_SETUP:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_CONTROL_DATA_IN:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_CONTROL_DATA_OUT:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_CONTROL_STATUS_IN:
    /* Fall through.  */
  case UX_HCD_STM32_ED_STATUS_CONTROL_STATUS_OUT:

    /* Keep waiting.  */
    UX_RESTORE
    return(UX_STATE_WAIT);

  default:
    UX_RESTORE

    /* Error trap.  */
    _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_HCD, UX_INVALID_STATE);

    /* If trace is enabled, insert this event into the trace buffer.  */
    UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_INVALID_STATE, 0, 0, 0, UX_TRACE_ERRORS, 0, 0)

    return(UX_STATE_EXIT);
  }
#else

  /* Setup for SETUP packet.  */
  _ux_hcd_stm32_request_control_setup(hcd_stm32, ed, endpoint, transfer_request);
  if (ed -> ux_stm32_ed_setup == UX_NULL)
    return(UX_MEMORY_INSUFFICIENT);

  /* Wait for the completion of the transfer request.  */
  status = _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, MS_TO_TICK(UX_CONTROL_TRANSFER_TIMEOUT));

  /* Free the resources.  */
  _ux_utility_memory_free(ed -> ux_stm32_ed_setup);
  ed -> ux_stm32_ed_setup = UX_NULL;

  /* If the semaphore did not succeed we probably have a time out.  */
  if (status != UX_SUCCESS)
  {
    /* All transfers pending need to abort. There may have been a partial transfer.  */
    _ux_host_stack_transfer_request_abort(transfer_request);

    /* There was an error, return to the caller.  */
    transfer_request -> ux_transfer_request_completion_code = UX_TRANSFER_TIMEOUT;

    /* If trace is enabled, insert this event into the trace buffer.  */
    UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_TRANSFER_TIMEOUT, transfer_request, 0, 0, UX_TRACE_ERRORS, 0, 0)

    return(UX_TRANSFER_TIMEOUT);
  }

  /* Check the transfer request completion code.  */
  if (transfer_request -> ux_transfer_request_completion_code != UX_SUCCESS)
  {
    /* Return completion to caller.  */
    return(transfer_request -> ux_transfer_request_completion_code);
  }

  /* Check if there is data phase.  */
  if (ed -> ux_stm32_ed_saved_length)
  {
    /* Prepare data stage.  */
    _ux_hcd_stm32_request_control_data(hcd_stm32, ed, endpoint, transfer_request);

    /* Wait for the completion of the transfer request.  */
    status = _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, MS_TO_TICK(UX_CONTROL_TRANSFER_TIMEOUT));

    /* If the semaphore did not succeed we probably have a time out.  */
    if (status != UX_SUCCESS)
    {
      /* All transfers pending need to abort. There may have been a partial transfer.  */
      _ux_host_stack_transfer_request_abort(transfer_request);

      /* There was an error, return to the caller.  */
      transfer_request -> ux_transfer_request_completion_code = UX_TRANSFER_TIMEOUT;

      /* If trace is enabled, insert this event into the trace buffer.  */
      UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_TRANSFER_TIMEOUT, transfer_request, 0, 0, UX_TRACE_ERRORS, 0, 0)

      return(UX_TRANSFER_TIMEOUT);
    }

    /* Check the transfer request completion code.  */
    if (transfer_request -> ux_transfer_request_completion_code != UX_SUCCESS)
    {
      /* Return completion to caller.  */
      return(transfer_request -> ux_transfer_request_completion_code);
    }
  }

  /* Prepare status stage.  */
  _ux_hcd_stm32_request_control_status(hcd_stm32, ed, endpoint, transfer_request);

  /* Wait for the completion of the transfer request.  */
  status = _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, UX_MS_TO_TICK(UX_CONTROL_TRANSFER_TIMEOUT));

  /* Restore the original transfer parameter.  */
  transfer_request -> ux_transfer_request_requested_length = ed -> ux_stm32_ed_saved_length;
  transfer_request -> ux_transfer_request_actual_length    = ed -> ux_stm32_ed_saved_actual_length;

  /* If the semaphore did not succeed we probably have a time out.  */
  if (status != UX_SUCCESS)
  {
    /* All transfers pending need to abort. There may have been a partial transfer.  */
    _ux_host_stack_transfer_request_abort(transfer_request);

    /* There was an error, return to the caller.  */
    transfer_request -> ux_transfer_request_completion_code = UX_TRANSFER_TIMEOUT;

    /* If trace is enabled, insert this event into the trace buffer.  */
    UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_TRANSFER_TIMEOUT, transfer_request, 0, 0, UX_TRACE_ERRORS, 0, 0)
  }

  /* Return completion to caller.  */
  return(transfer_request -> ux_transfer_request_completion_code);
#endif /* defined(UX_HOST_STANDALONE) */
}

static inline VOID _ux_hcd_stm32_request_control_setup(UX_HCD_STM32 *hcd_stm32,
                                                       UX_HCD_STM32_ED *ed, UX_ENDPOINT *endpoint, UX_TRANSFER *transfer_request)
{
  UCHAR                   *setup_request;

  /* Save the pending transfer in the ED.  */
  ed -> ux_stm32_ed_transfer_request = transfer_request;

  /* Build the SETUP packet (phase 1 of the control transfer).  */
  ed -> ux_stm32_ed_setup = UX_NULL;
  setup_request = _ux_utility_memory_allocate(UX_NO_ALIGN, UX_CACHE_SAFE_MEMORY, UX_SETUP_SIZE);

  if (setup_request == UX_NULL)
    return;

  ed -> ux_stm32_ed_setup = setup_request;

  /* Build the SETUP request.  */
  *(setup_request + UX_SETUP_REQUEST_TYPE) = transfer_request -> ux_transfer_request_type;
  *(setup_request + UX_SETUP_REQUEST) = transfer_request -> ux_transfer_request_function;
  _ux_utility_short_put(setup_request + UX_SETUP_VALUE, transfer_request -> ux_transfer_request_value);
  _ux_utility_short_put(setup_request + UX_SETUP_INDEX, transfer_request -> ux_transfer_request_index);
  _ux_utility_short_put(setup_request + UX_SETUP_LENGTH, (USHORT) transfer_request -> ux_transfer_request_requested_length);

  /* Save the original transfer parameter.  */
  ed -> ux_stm32_ed_saved_length = transfer_request -> ux_transfer_request_requested_length;
  ed -> ux_stm32_ed_data = setup_request;

  /* Reset requested length for SETUP packet.  */
  transfer_request -> ux_transfer_request_requested_length = 0;

  /* Set the packet length for SETUP packet.  */
  ed -> ux_stm32_ed_packet_length = 8;

  /* Set the current status.  */
  ed -> ux_stm32_ed_status = UX_HCD_STM32_ED_STATUS_CONTROL_SETUP;

  /* Set device speed.  */
  switch (endpoint -> ux_endpoint_device -> ux_device_speed)
  {
  case UX_HIGH_SPEED_DEVICE:
    ed -> ux_stm32_ed_speed = UX_HIGH_SPEED_DEVICE;
    break;
  case UX_LOW_SPEED_DEVICE:
    ed -> ux_stm32_ed_speed = UX_LOW_SPEED_DEVICE;
    break;
  default:
    ed -> ux_stm32_ed_speed = UX_FULL_SPEED_DEVICE;
    break;
  }

  /* Initialize the host channel for SETUP phase.  */
  ed -> ux_stm32_ed_dir = HAL_HCD_CH_OUT_DIR;

  ed->ux_stm32_ch_config.device_address = endpoint -> ux_endpoint_device -> ux_device_address;
  ed->ux_stm32_ch_config.device_speed = (hal_hcd_device_speed_t)ed -> ux_stm32_ed_speed;
  ed->ux_stm32_ch_config.ep_address = 0U;
  ed->ux_stm32_ch_config.ep_type = HAL_HCD_EP_TYPE_CTRL;
  ed->ux_stm32_ch_config.ep_mps = endpoint -> ux_endpoint_descriptor.wMaxPacketSize;

  HAL_HCD_SetConfigChannel(hcd_stm32->hcd_handle, ed->ux_stm32_ed_channel, &ed->ux_stm32_ch_config);

#if defined (USE_HAL_HCD_USB_HUB_HS_SPLIT) && (USE_HAL_HCD_USB_HUB_HS_SPLIT == 1U) && (UX_MAX_DEVICES > 1)
  /* Check if device connected to hub  */
  if (endpoint->ux_endpoint_device->ux_device_parent != NULL)
  {
    HAL_HCD_SetChannelHubInfo(hcd_stm32->hcd_handle, ed->ux_stm32_ed_channel,
                              endpoint->ux_endpoint_device->ux_device_parent->ux_device_address,
                              endpoint->ux_endpoint_device->ux_device_port_location);
  }
#endif /* defined (USE_HAL_HCD_USB_HUB_HS_SPLIT) && (USE_HAL_HCD_USB_HUB_HS_SPLIT == 1U) && (UX_MAX_DEVICES > 1) */

  /* Send the SETUP packet.  */
  ed->ux_stm32_ch_transfer_request.ch_dir = HAL_HCD_CH_OUT_DIR;
  ed->ux_stm32_ch_transfer_request.ep_type = HAL_HCD_EP_TYPE_CTRL;
  ed->ux_stm32_ch_transfer_request.transfer_length = 8U;
  ed->ux_stm32_ch_transfer_request.p_buffer = setup_request;
  ed->ux_stm32_ch_transfer_request.token_type = USBH_PID_SETUP;
  ed->ux_stm32_ch_transfer_request.do_ping = 0U;

  HAL_HCD_RequestChannelTransfer(hcd_stm32 -> hcd_handle, ed -> ux_stm32_ed_channel, &ed->ux_stm32_ch_transfer_request);
}

static inline VOID _ux_hcd_stm32_request_control_data(UX_HCD_STM32 *hcd_stm32,
                                                      UX_HCD_STM32_ED *ed, UX_ENDPOINT *endpoint, UX_TRANSFER *transfer_request)
{
  hal_hcd_dma_status_t      dma_status;

  /* Check the direction of the transaction.  */
  if ((transfer_request -> ux_transfer_request_type & UX_REQUEST_DIRECTION) == UX_REQUEST_IN)
  {

    /* Re-initialize the host channel to IN direction.  */
    ed -> ux_stm32_ed_dir = HAL_HCD_CH_IN_DIR;

    ed->ux_stm32_ch_config.device_address = endpoint->ux_endpoint_device->ux_device_address;
    ed->ux_stm32_ch_config.device_speed = (hal_hcd_device_speed_t)ed->ux_stm32_ed_speed;
    ed->ux_stm32_ch_config.ep_address = 0x80U;
    ed->ux_stm32_ch_config.ep_type = HAL_HCD_EP_TYPE_CTRL;
    ed->ux_stm32_ch_config.ep_mps = endpoint->ux_endpoint_descriptor.wMaxPacketSize;

    HAL_HCD_SetConfigChannel(hcd_stm32->hcd_handle, ed->ux_stm32_ed_channel, &ed->ux_stm32_ch_config);

#if defined (USE_HAL_HCD_USB_HUB_HS_SPLIT) && (USE_HAL_HCD_USB_HUB_HS_SPLIT == 1U) && (UX_MAX_DEVICES > 1)
    /* Check if device connected to hub  */
    if (endpoint->ux_endpoint_device->ux_device_parent != NULL)
    {
      HAL_HCD_SetChannelHubInfo(hcd_stm32->hcd_handle, ed->ux_stm32_ed_channel,
                                endpoint->ux_endpoint_device->ux_device_parent->ux_device_address,
                                endpoint->ux_endpoint_device->ux_device_port_location);
    }
#endif /* defined (USE_HAL_HCD_USB_HUB_HS_SPLIT) && (USE_HAL_HCD_USB_HUB_HS_SPLIT == 1U) && (UX_MAX_DEVICES > 1) */

    /* Set the current status to data IN.  */
    ed -> ux_stm32_ed_status = UX_HCD_STM32_ED_STATUS_CONTROL_DATA_IN;
  }
  else
  {
    /* Set the current status to data OUT.  */
    ed -> ux_stm32_ed_status = UX_HCD_STM32_ED_STATUS_CONTROL_DATA_OUT;
  }

  /* Save the pending transfer in the ED.  */
  ed -> ux_stm32_ed_transfer_request = transfer_request;

  /* Set the transfer to pending.  */
  transfer_request -> ux_transfer_request_completion_code = UX_TRANSFER_STATUS_PENDING;

  /* Restore requested length.  */
  transfer_request -> ux_transfer_request_requested_length = ed -> ux_stm32_ed_saved_length;

  dma_status = (hal_hcd_dma_status_t)(hcd_stm32->hcd_handle->driver.core_get_dma_status((UINT)hcd_stm32->hcd_handle->instance));

  /* If the direction is OUT, request size is larger than MPS, and DMA is not used, we need to set transfer length to MPS.  */
  if ((ed -> ux_stm32_ed_dir == 0) &&
      (transfer_request -> ux_transfer_request_requested_length > endpoint -> ux_endpoint_descriptor.wMaxPacketSize) &&
        (dma_status == HAL_HCD_DMA_DISABLED))
  {

    /* Set transfer length to MPS.  */
    ed -> ux_stm32_ed_packet_length = endpoint -> ux_endpoint_descriptor.wMaxPacketSize;
  }
  else
  {
    /* Keep the original transfer length.  */
    ed -> ux_stm32_ed_packet_length = transfer_request -> ux_transfer_request_requested_length;
  }

  /* Reset actual length.  */
  transfer_request -> ux_transfer_request_actual_length = 0;

  /* Prepare transactions.  */
  _ux_hcd_stm32_request_trans_prepare(hcd_stm32, ed, transfer_request);

  /* Submit the transfer request.  */
  ed->ux_stm32_ch_transfer_request.ch_dir = ed -> ux_stm32_ed_dir;
  ed->ux_stm32_ch_transfer_request.ep_type = HAL_HCD_EP_TYPE_CTRL;
  ed->ux_stm32_ch_transfer_request.transfer_length = ed -> ux_stm32_ed_packet_length;
  ed->ux_stm32_ch_transfer_request.p_buffer = ed -> ux_stm32_ed_data;
  ed->ux_stm32_ch_transfer_request.token_type = USBH_PID_DATA;
  ed->ux_stm32_ch_transfer_request.do_ping = 0U;

  HAL_HCD_RequestChannelTransfer(hcd_stm32 -> hcd_handle, ed -> ux_stm32_ed_channel, &ed->ux_stm32_ch_transfer_request);
}

static inline VOID _ux_hcd_stm32_request_control_status(UX_HCD_STM32 *hcd_stm32,
                                                        UX_HCD_STM32_ED *ed, UX_ENDPOINT *endpoint, UX_TRANSFER *transfer_request)
{
  /* Setup status phase direction.  */
  ed -> ux_stm32_ed_dir = (hal_hcd_ch_direction_t)(!ed -> ux_stm32_ed_dir);

  ed->ux_stm32_ch_config.device_address = endpoint -> ux_endpoint_device -> ux_device_address;
  ed->ux_stm32_ch_config.device_speed = (hal_hcd_device_speed_t)ed -> ux_stm32_ed_speed;
  ed->ux_stm32_ch_config.ep_address = ed -> ux_stm32_ed_dir ? 0x80U : 0x00U;
  ed->ux_stm32_ch_config.ep_type = HAL_HCD_EP_TYPE_CTRL;
  ed->ux_stm32_ch_config.ep_mps = endpoint -> ux_endpoint_descriptor.wMaxPacketSize;

  HAL_HCD_SetConfigChannel(hcd_stm32->hcd_handle, ed -> ux_stm32_ed_channel, &ed->ux_stm32_ch_config);

#if defined (USE_HAL_HCD_USB_HUB_HS_SPLIT) && (USE_HAL_HCD_USB_HUB_HS_SPLIT == 1U) && (UX_MAX_DEVICES > 1)
  /* Check if device connected to hub  */
  if (endpoint->ux_endpoint_device->ux_device_parent != NULL)
  {
    HAL_HCD_SetChannelHubInfo(hcd_stm32->hcd_handle, ed->ux_stm32_ed_channel,
                              endpoint->ux_endpoint_device->ux_device_parent->ux_device_address,
                              endpoint->ux_endpoint_device->ux_device_port_location);
  }
#endif /* defined (USE_HAL_HCD_USB_HUB_HS_SPLIT) && (USE_HAL_HCD_USB_HUB_HS_SPLIT == 1U) && (UX_MAX_DEVICES > 1) */

  /* Save the pending transfer in the ED.  */
  ed -> ux_stm32_ed_transfer_request = transfer_request;

  /* Set the transfer to pending.  */
  transfer_request -> ux_transfer_request_completion_code = UX_TRANSFER_STATUS_PENDING;

  /* Save the original transfer parameter.  */
  ed -> ux_stm32_ed_saved_length = (USHORT)
                  transfer_request -> ux_transfer_request_requested_length;
  transfer_request -> ux_transfer_request_requested_length = 0;

  ed -> ux_stm32_ed_saved_actual_length = (USHORT)
                  transfer_request -> ux_transfer_request_actual_length;
  transfer_request -> ux_transfer_request_actual_length = 0;

  /* Reset the packet length.  */
  ed -> ux_stm32_ed_packet_length = 0;

  /* Set the current status to data OUT.  */
  ed -> ux_stm32_ed_status = ed -> ux_stm32_ed_dir ?
                                  UX_HCD_STM32_ED_STATUS_CONTROL_STATUS_IN :
                                  UX_HCD_STM32_ED_STATUS_CONTROL_STATUS_OUT;

  /* Submit the request for status phase.  */
  ed->ux_stm32_ch_transfer_request.ch_dir = ed -> ux_stm32_ed_dir;
  ed->ux_stm32_ch_transfer_request.ep_type = HAL_HCD_EP_TYPE_CTRL;
  ed->ux_stm32_ch_transfer_request.transfer_length = 0U;
  ed->ux_stm32_ch_transfer_request.p_buffer = ed -> ux_stm32_ed_data;
  ed->ux_stm32_ch_transfer_request.token_type = USBH_PID_DATA;
  ed->ux_stm32_ch_transfer_request.do_ping = 0U;

  HAL_HCD_RequestChannelTransfer(hcd_stm32 -> hcd_handle, ed -> ux_stm32_ed_channel, &ed->ux_stm32_ch_transfer_request);
}
