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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 */
/** */
/** Prolific Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_prolific.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_prolific_deactivate PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the prolific has been */
/* removed from the bus either directly or indirectly. The bulk in\out */
/* and optional interrupt pipes will be destroyed and the instance */
/* removed. */
/* */
/* INPUT */
/* */
/* command Prolific 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_schedule_other Schedule other threads */
/* */
/* CALLED BY */
/* */
/* _ux_host_class_prolific_entry Entry of prolific class */
/* */
/**************************************************************************/
UINT _ux_host_class_prolific_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_PROLIFIC *prolific;
UX_TRANSFER *transfer_request;
UINT status;
/* Get the instance for this class. */
prolific = (UX_HOST_CLASS_PROLIFIC *) command -> ux_host_class_command_instance;
/* The prolific is being shut down. */
prolific -> ux_host_class_prolific_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
/* Protect thread reentry to this instance. */
status = _ux_host_semaphore_get(&prolific -> ux_host_class_prolific_semaphore, UX_WAIT_FOREVER);
if (status != UX_SUCCESS)
/* Return error. */
return(status);
/* If the interrupt endpoint is defined, clean any pending transfer. */
if (prolific -> ux_host_class_prolific_interrupt_endpoint != UX_NULL)
{
/* Wait for any current transfer to be out of pending. */
transfer_request = &prolific -> ux_host_class_prolific_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(prolific -> ux_host_class_prolific_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 = &prolific -> ux_host_class_prolific_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(prolific -> ux_host_class_prolific_bulk_in_endpoint);
/* Then endpoint OUT. */
transfer_request = &prolific -> ux_host_class_prolific_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. */
_ux_host_stack_endpoint_transfer_abort(prolific -> ux_host_class_prolific_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(prolific -> ux_host_class_prolific_class, (VOID *) prolific);
/* Destroy the semaphore. */
_ux_host_semaphore_delete(&prolific -> ux_host_class_prolific_semaphore);
/* 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, prolific -> ux_host_class_prolific_class, (VOID *) prolific);
}
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_PROLIFIC_DEACTIVATE, prolific, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(prolific);
/* Free the prolific instance memory. */
_ux_utility_memory_free(prolific);
/* Return successful status. */
return(UX_SUCCESS);
}
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