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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 */
/** */
/** Asix Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_asix.h"
#include "ux_host_stack.h"
#if !defined(UX_HOST_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_asix_deactivate PORTABLE C */
/* 6.2.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the asix has been */
/* removed from the bus either directly or indirectly. The bulk in\out */
/* and interrupt pipes will be destroyed and the instance */
/* removed. */
/* */
/* INPUT */
/* */
/* command Asix class command pointer */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_destroy Destroy the class instance */
/* _ux_host_stack_endpoint_transfer_abort Abort endpoint transfer */
/* _ux_utility_memory_free Free memory block */
/* _ux_host_semaphore_get Get protection semaphore */
/* _ux_host_semaphore_delete Delete protection semaphore */
/* _ux_utility_thread_delete Delete thread */
/* _ux_network_driver_deactivate Deactivate NetX USB interface */
/* nx_packet_transmit_release Release NetX packet */
/* */
/* CALLED BY */
/* */
/* _ux_host_class_asix_entry Entry of asix class */
/* */
/**************************************************************************/
UINT _ux_host_class_asix_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_ASIX *asix;
UX_TRANSFER *transfer_request;
NX_PACKET *current_packet;
NX_PACKET *next_packet;
UINT status;
/* Get the instance for this class. */
asix = (UX_HOST_CLASS_ASIX *) command -> ux_host_class_command_instance;
/* Protect thread reentry to this instance. */
status = _ux_host_semaphore_get(&asix -> ux_host_class_asix_semaphore, UX_WAIT_FOREVER);
if (status != UX_SUCCESS)
/* Return error. */
return(status);
/* The asix is being shut down. */
asix -> ux_host_class_asix_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
/* Check if link was up. */
if (asix -> ux_host_class_asix_link_state == UX_HOST_CLASS_ASIX_LINK_STATE_UP)
{
/* We need to free the packets that will not be sent. */
current_packet = asix -> ux_host_class_asix_xmit_queue;
/* Get the next packet associated with the first packet. */
next_packet = current_packet -> nx_packet_queue_next;
/* Parse all these packets that were scheduled. */
while (current_packet != UX_NULL)
{
/* Free the packet that was just sent. First do some housekeeping. */
current_packet -> nx_packet_prepend_ptr = current_packet -> nx_packet_prepend_ptr + UX_HOST_CLASS_ASIX_ETHERNET_SIZE;
current_packet -> nx_packet_length = current_packet -> nx_packet_length - UX_HOST_CLASS_ASIX_ETHERNET_SIZE;
/* And ask Netx to release it. */
nx_packet_transmit_release(current_packet);
/* Next packet becomes the current one. */
current_packet = next_packet;
/* Next packet now. */
if (current_packet != UX_NULL)
/* Get the next packet associated with the first packet. */
next_packet = current_packet -> nx_packet_queue_next;
}
}
/* Now the link is down. */
asix -> ux_host_class_asix_link_state = UX_HOST_CLASS_ASIX_LINK_STATE_DOWN;
/* Deregister this interface to the NetX USB interface broker. */
_ux_network_driver_deactivate((VOID *) asix, asix -> ux_host_class_asix_network_handle);
/* If the interrupt endpoint is defined, clean any pending transfer. */
if (asix -> ux_host_class_asix_interrupt_endpoint != UX_NULL)
{
/* Wait for any current transfer to be out of pending. */
transfer_request = &asix -> ux_host_class_asix_interrupt_endpoint -> ux_endpoint_transfer_request;
if (transfer_request -> ux_transfer_request_completion_code == UX_TRANSFER_STATUS_PENDING)
/* And abort any transfer. */
_ux_host_stack_endpoint_transfer_abort(asix -> ux_host_class_asix_interrupt_endpoint);
/* And free the memory used by the interrupt endpoint. */
_ux_utility_memory_free(transfer_request -> ux_transfer_request_data_pointer);
}
/* First we take care of cleaning endpoint IN. */
transfer_request = &asix -> ux_host_class_asix_bulk_in_endpoint -> ux_endpoint_transfer_request;
if (transfer_request -> ux_transfer_request_completion_code == UX_TRANSFER_STATUS_PENDING)
/* We need to abort transactions on the bulk In pipe. */
_ux_host_stack_endpoint_transfer_abort(asix -> ux_host_class_asix_bulk_in_endpoint);
/* Then endpoint OUT. */
transfer_request = &asix -> ux_host_class_asix_bulk_out_endpoint -> ux_endpoint_transfer_request;
if (transfer_request -> ux_transfer_request_completion_code == UX_TRANSFER_STATUS_PENDING)
/* We need to abort transactions on the bulk Out pipe. We normally don't need that anymore. */
_ux_host_stack_endpoint_transfer_abort(asix -> ux_host_class_asix_bulk_out_endpoint);
/* The enumeration thread needs to sleep a while to allow the application or the class that may be using
endpoints to exit properly. */
_ux_host_thread_schedule_other(UX_THREAD_PRIORITY_ENUM);
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(asix -> ux_host_class_asix_class, (VOID *) asix);
/* Destroy the semaphores. */
_ux_host_semaphore_delete(&asix -> ux_host_class_asix_semaphore);
_ux_host_semaphore_delete(&asix -> ux_host_class_asix_interrupt_notification_semaphore);
/* Destroy the link monitoring thread. */
_ux_utility_thread_delete(&asix -> ux_host_class_asix_thread);
/* free its stack memory. */
_ux_utility_memory_free(asix -> ux_host_class_asix_thread_stack);
/* Free receive buffer memory. */
_ux_utility_memory_free(asix -> ux_host_class_asix_receive_buffer);
#ifdef UX_HOST_CLASS_ASIX_PACKET_CHAIN_SUPPORT
/* Free transmit buffer memory. */
if (asix -> ux_host_class_asix_xmit_buffer)
_ux_utility_memory_free(asix -> ux_host_class_asix_xmit_buffer);
#endif
/* Before we free the device resources, we need to inform the application
that the device is removed. */
if (_ux_system_host -> ux_system_host_change_function != UX_NULL)
{
/* Inform the application the device is removed. */
_ux_system_host -> ux_system_host_change_function(UX_DEVICE_REMOVAL, asix -> ux_host_class_asix_class, (VOID *) asix);
}
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_ASIX_DEACTIVATE, asix, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(asix);
/* Free the asix instance memory. */
_ux_utility_memory_free(asix);
/* Return successful status. */
return(UX_SUCCESS);
}
#endif
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