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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 */
/** */
/** Audio Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_audio.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_audio_deactivate PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the audio has been */
/* removed from the bus either directly or indirectly. The iso pipes */
/* will be destroyed and the instanced removed. */
/* */
/* INPUT */
/* */
/* command Pointer to command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_destroy Destroy class instance */
/* _ux_host_stack_endpoint_transfer_abort Abort outstanding transfer */
/* _ux_host_mutex_on Get mutex */
/* _ux_host_mutex_delete Delete mutex */
/* _ux_utility_memory_free Release memory block */
/* */
/* CALLED BY */
/* */
/* Audio Class */
/* */
/**************************************************************************/
UINT _ux_host_class_audio_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_AUDIO *audio;
#if defined(UX_HOST_CLASS_AUDIO_INTERRUPT_SUPPORT)
UX_HOST_CLASS_AUDIO_AC *ac;
UINT i;
#endif
/* Get the instance for this class. */
audio = (UX_HOST_CLASS_AUDIO *) command -> ux_host_class_command_instance;
#if defined(UX_HOST_CLASS_AUDIO_INTERRUPT_SUPPORT)
if (_ux_host_class_audio_subclass_get(audio) == UX_HOST_CLASS_AUDIO_SUBCLASS_CONTROL)
{
ac = (UX_HOST_CLASS_AUDIO_AC *)audio;
/* Stop interrupt and free allocated buffer for it. */
if (ac -> ux_host_class_audio_interrupt_endpoint)
{
_ux_host_stack_endpoint_transfer_abort(ac -> ux_host_class_audio_interrupt_endpoint);
_ux_utility_memory_free(ac -> ux_host_class_audio_interrupt_endpoint ->
ux_endpoint_transfer_request.ux_transfer_request_data_pointer);
}
/* 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);
/* Clear the links in AS interfaces. */
for (i = 0; i < ac -> ux_host_class_audio_as_count; i++)
{
if (ac -> ux_host_class_audio_as[i])
ac -> ux_host_class_audio_as[i] -> ux_host_class_audio_ac = UX_NULL;
}
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(audio -> ux_host_class_audio_class, (VOID *) audio);
}
else
#endif
{
/* The audio is being shut down. */
audio -> ux_host_class_audio_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
/* Protect thread reentry to this instance. */
_ux_host_mutex_on(&audio -> ux_host_class_audio_mutex);
/* We need to abort transactions on the iso pipe. */
if (audio -> ux_host_class_audio_isochronous_endpoint)
_ux_host_stack_endpoint_transfer_abort(audio -> ux_host_class_audio_isochronous_endpoint);
#if defined(UX_HOST_CLASS_AUDIO_FEEDBACK_SUPPORT)
if (audio -> ux_host_class_audio_feedback_endpoint)
{
_ux_host_stack_endpoint_transfer_abort(audio -> ux_host_class_audio_feedback_endpoint);
_ux_utility_memory_free(audio -> ux_host_class_audio_feedback_endpoint -> ux_endpoint_transfer_request.ux_transfer_request_data_pointer);
}
#endif
/* 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);
#if defined(UX_HOST_CLASS_AUDIO_INTERRUPT_SUPPORT)
/* Clear the links in AC interface. */
ac = audio -> ux_host_class_audio_ac;
if (ac)
ac -> ux_host_class_audio_as[audio -> ux_host_class_audio_ac_as] = UX_NULL;
#endif
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(audio -> ux_host_class_audio_class, (VOID *) audio);
/* Destroy the semaphore. */
_ux_host_mutex_delete(&audio -> ux_host_class_audio_mutex);
}
/* 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, audio -> ux_host_class_audio_class, (VOID *) audio);
}
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_AUDIO_DEACTIVATE, audio, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(audio);
/* Free the audio instance memory. */
_ux_utility_memory_free(audio);
/* Return successful completion. */
return(UX_SUCCESS);
}
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