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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 */
/** */
/** Device RNDIS Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_rndis.h"
#include "ux_device_stack.h"
#if !defined(UX_DEVICE_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_rndis_interrupt_thread PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the thread of the rndis interrupt endpoint */
/* */
/* INPUT */
/* */
/* rndis_class Address of rndis class */
/* container */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Request transfer */
/* _ux_utility_event_flags_get Get event flags */
/* _ux_device_thread_suspend Suspend thread */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
VOID _ux_device_class_rndis_interrupt_thread(ULONG rndis_class)
{
UX_SLAVE_CLASS *class_ptr;
UX_SLAVE_CLASS_RNDIS *rndis;
UX_SLAVE_DEVICE *device;
UX_SLAVE_TRANSFER *transfer_request;
UINT status;
ULONG actual_flags;
/* Cast properly the rndis instance. */
UX_THREAD_EXTENSION_PTR_GET(class_ptr, UX_SLAVE_CLASS, rndis_class)
/* Get the rndis instance from this class container. */
rndis = (UX_SLAVE_CLASS_RNDIS *) class_ptr -> ux_slave_class_instance;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* This thread runs forever but can be suspended or resumed. */
while(1)
{
/* All RNDIS events are on the interrupt endpoint IN, from the host. */
transfer_request = &rndis -> ux_slave_class_rndis_interrupt_endpoint -> ux_slave_endpoint_transfer_request;
/* As long as the device is in the CONFIGURED state. */
while (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED)
{
/* Wait until we have a event sent by the application. We do not treat yet the case where a timeout based
on the interrupt pipe frequency or a change in the idle state forces us to send an empty report. */
status = _ux_utility_event_flags_get(&rndis -> ux_slave_class_rndis_event_flags_group, (UX_DEVICE_CLASS_RNDIS_NEW_INTERRUPT_EVENT |
UX_DEVICE_CLASS_RNDIS_NEW_DEVICE_STATE_CHANGE_EVENT),
UX_OR_CLEAR, &actual_flags, UX_WAIT_FOREVER);
/* If error log is enabled, insert this error message into the log buffer. */
/* Check the completion code. */
if (status == UX_SUCCESS && (actual_flags & UX_DEVICE_CLASS_RNDIS_NEW_DEVICE_STATE_CHANGE_EVENT) == 0)
{
/* Send the request to the device controller. */
status = _ux_device_stack_transfer_request(transfer_request, UX_DEVICE_CLASS_RNDIS_INTERRUPT_RESPONSE_LENGTH,
UX_DEVICE_CLASS_RNDIS_INTERRUPT_RESPONSE_LENGTH);
/* Check error code. */
if (status != UX_SUCCESS)
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, status);
}
}
/* We need to suspend ourselves. We will be resumed by the device enumeration module. */
_ux_device_thread_suspend(&rndis -> ux_slave_class_rndis_interrupt_thread);
}
}
#endif
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