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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_configuration_set PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function performs a setting of a device configuration. */
/* */
/* In RTOS mode, this function is blocking. */
/* If the host is OTG capable and the device has an OTG descriptor */
/* that supports HNP we perform a SET_FEATURE with b_hnp_support. */
/* */
/* In standalone mode, when device enumeration is in progress, this */
/* function is non-blocking, it prepares transfer for enum step of */
/* SET_CONFIGURE request. Otherwise it blocks until transfer request */
/* done. */
/* */
/* INPUT */
/* */
/* configuration Pointer to configuration */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_transfer_request Process transfer request */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/**************************************************************************/
UINT _ux_host_stack_configuration_set(UX_CONFIGURATION *configuration)
{
UX_DEVICE *device;
UX_TRANSFER *transfer_request;
UINT status;
UX_ENDPOINT *control_endpoint;
#ifdef UX_OTG_SUPPORT
UX_HCD *hcd;
#endif
/* A configuration is selected. Retrieve the pointer to the control endpoint
and its transfer request. */
device = configuration -> ux_configuration_device;
control_endpoint = &device -> ux_device_control_endpoint;
transfer_request = &control_endpoint -> ux_endpoint_transfer_request;
#ifdef UX_OTG_SUPPORT
/* Check if the configuration has an OTG device with HNP feature. */
if (configuration -> ux_configuration_otg_capabilities & UX_OTG_HNP_SUPPORT)
{
/* For HNP to work the device has to be connected directly to the Root Hub and not
a down stream hub. If the parent is NULL, the device is on the root hub. */
if (UX_DEVICE_PARENT_IS_ROOTHUB(device))
{
/* With the device we have the pointer to the HCD. */
hcd = UX_DEVICE_HCD_GET(device);
/* Check the HCD to ensure we have an OTG host controller. */
if (hcd -> ux_hcd_otg_capabilities & UX_HCD_OTG_CAPABLE)
{
/* The Host controller is OTG aware. Perform a SET_FEATURE with b_hnp_support. */
transfer_request -> ux_transfer_request_data_pointer = UX_NULL;
transfer_request -> ux_transfer_request_requested_length = 0;
transfer_request -> ux_transfer_request_function = UX_SET_FEATURE;
transfer_request -> ux_transfer_request_type = UX_REQUEST_OUT| UX_REQUEST_TYPE_STANDARD | UX_REQUEST_TARGET_DEVICE;
transfer_request -> ux_transfer_request_value = UX_OTG_FEATURE_A_HNP_SUPPORT;
transfer_request -> ux_transfer_request_index = 0;
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* If the device fails this command we turn off its OTG capabilities. */
if (status != UX_SUCCESS)
/* Reset the OTG capabilities of the device. */
configuration -> ux_configuration_otg_capabilities = 0;
}
}
}
#endif
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_CONFIGURATION_SET, configuration, 0, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
/* 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 = (USHORT) configuration -> ux_configuration_descriptor.bConfigurationValue;
transfer_request -> ux_transfer_request_index = 0;
#if defined(UX_HOST_STANDALONE)
if (device -> ux_device_flags &= UX_DEVICE_FLAG_ENUM)
{
/* Special case for enumeration process, non-blocking. */
device -> ux_device_enum_trans = transfer_request;
status = UX_SUCCESS;
return(status);
}
/* Tend to be blocking after enumeration done. */
#endif
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* Check completion status. */
if(status == UX_SUCCESS)
{
/* Change the device state to configured. */
device -> ux_device_state = UX_DEVICE_CONFIGURED;
/* Store the new configuration value in the device container. */
device -> ux_device_current_configuration = configuration;
/* Save current device power source. */
device -> ux_device_power_source = (configuration ->
ux_configuration_descriptor.bmAttributes &
UX_CONFIGURATION_DEVICE_SELF_POWERED) ?
UX_DEVICE_SELF_POWERED : UX_DEVICE_BUS_POWERED;
}
/* Return status to caller. */
return(status);
}
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