/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * 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                                                        */
/**                                                                       */
/**   Host Stack                                                          */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/


/* Include necessary system files.  */

#define UX_SOURCE_CODE

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


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_host_stack_device_configuration_reset           PORTABLE C      */
/*                                                           6.1.12       */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function resets the configuration of the device to zero.       */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    configuration                          Pointer to configuration     */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_stack_configuration_instance_delete                        */
/*                                           Delete configuration instance*/
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    USBX Components                                                     */
/*                                                                        */
/**************************************************************************/
UINT  _ux_host_stack_device_configuration_reset(UX_DEVICE *device)
{

UX_TRANSFER             *transfer_request;
UX_ENDPOINT             *control_endpoint;
UX_CONFIGURATION        *current_configuration;
UINT                    status;

    /* If trace is enabled, insert this event into the trace buffer.  */
    UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_DEVICE_CONFIGURATION_SELECT, device, 0, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)

    /* A configuration is selected. Retrieve the pointer to the control endpoint
       and its transfer request.  */
    control_endpoint =  &device -> ux_device_control_endpoint;
    transfer_request =  &control_endpoint -> ux_endpoint_transfer_request;

    /* Check for the state of the device . If the device is already configured,
       we need to cancel the existing configuration before resetting it.   */
    if (device -> ux_device_state == UX_DEVICE_CONFIGURED)
    {

        /* The device is configured. Get the first configuration pointer.  */
        current_configuration =  device -> ux_device_current_configuration;

        /* Deselect this instance */
        _ux_host_stack_configuration_instance_delete(current_configuration);
    }

    /* No configuration is selected now.  */
    device -> ux_device_current_configuration = UX_NULL;

    /* Packed descriptor are not valid now.  */
    if (device -> ux_device_packed_configuration)
    {
        _ux_utility_memory_free(device -> ux_device_packed_configuration);
        device -> ux_device_packed_configuration = UX_NULL;
        device -> ux_device_packed_configuration_keep_count = 0;
    }

    /* Set state of device to ADDRESSED.  */
    device -> ux_device_state = UX_DEVICE_ADDRESSED;

    /* Reset power source.  */
    device -> ux_device_power_source = UX_DEVICE_BUS_POWERED;

    /* Create a transfer_request for the SET_CONFIGURATION request. No data for this request.  */
    transfer_request -> ux_transfer_request_requested_length =  0;
    transfer_request -> ux_transfer_request_function =          UX_SET_CONFIGURATION;
    transfer_request -> ux_transfer_request_type =              UX_REQUEST_OUT | UX_REQUEST_TYPE_STANDARD | UX_REQUEST_TARGET_DEVICE;
    transfer_request -> ux_transfer_request_value =             0;
    transfer_request -> ux_transfer_request_index =             0;

    /* Send request to HCD layer.  */
    status =  _ux_host_stack_transfer_request(transfer_request);

    /* Return status.  */
    return(status);
}

