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/***************************************************************************
* 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);
}
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