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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 Audio Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_audio.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_audio_interrupt_send PORTABLE C */
/* 6.2.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function queues audio interrupt data. */
/* */
/* Note the interrupt data size is predefined on initialization: */
/* - for Audio 1.0 interrupt status word is 2 bytes */
/* - for Audio 2.0 interrupt data message is 6 bytes */
/* */
/* INPUT */
/* */
/* audio Address of audio instance */
/* int_data Interrupt data (2 or 6 bytes) */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _ux_device_class_audio_interrupt_send(UX_DEVICE_CLASS_AUDIO *audio, UCHAR *int_data)
{
#if !defined(UX_DEVICE_CLASS_AUDIO_INTERRUPT_SUPPORT)
UX_PARAMETER_NOT_USED(audio);
UX_PARAMETER_NOT_USED(int_data);
return(UX_FUNCTION_NOT_SUPPORTED);
#else
UX_SLAVE_DEVICE *device;
UX_SLAVE_ENDPOINT *endpoint;
UCHAR *buff, *end;
ULONG size;
ULONG i;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* As long as the device is in the CONFIGURED state. */
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED)
{
/* Cannot proceed with command, the interface is down. */
return(UX_CONFIGURATION_HANDLE_UNKNOWN);
}
/* Check if endpoint is available. */
endpoint = audio -> ux_device_class_audio_interrupt;
if (endpoint == UX_NULL)
return(UX_FUNCTION_NOT_SUPPORTED);
/* Get interrupt data size. */
size = audio -> ux_device_class_audio_status_size;
/* Protect queue status. */
_ux_device_mutex_on(&audio -> ux_device_class_audio_status_mutex);
/* Check if data exist. */
buff = audio -> ux_device_class_audio_status_tail;
end = audio -> ux_device_class_audio_status_queue + audio -> ux_device_class_audio_status_queue_bytes;
for (i = 0; i < audio -> ux_device_class_audio_status_queued; i += size)
{
/* Check if data match. */
if (_ux_utility_memory_compare(buff, int_data, size) == UX_SUCCESS)
{
/* Already queued. */
_ux_device_mutex_off(&audio -> ux_device_class_audio_status_mutex);
return(UX_SUCCESS);
}
/* Next saved data. */
buff += size;
if (buff >= end)
buff = audio -> ux_device_class_audio_status_queue;
}
/* No data match before buff achieve head. */
UX_ASSERT(buff == audio -> ux_device_class_audio_status_head);
/* If no free space, return busy (pending). */
if (audio -> ux_device_class_audio_status_queued >=
audio -> ux_device_class_audio_status_queue_bytes)
{
/* No queue space, pending. */
_ux_device_mutex_off(&audio -> ux_device_class_audio_status_mutex);
return(UX_BUSY);
}
/* Copy data to head. */
_ux_utility_memory_copy(buff, int_data, size); /* Use case of memcpy is verified. */
/* Move head. */
buff += size;
if (buff >= end)
buff = audio -> ux_device_class_audio_status_queue;
audio -> ux_device_class_audio_status_head = buff;
/* Add to queued bytes. */
audio -> ux_device_class_audio_status_queued += size;
/* Unprotect queue status. */
_ux_device_mutex_off(&audio -> ux_device_class_audio_status_mutex);
/* Notify status thread to issue interrupt request. */
_ux_device_semaphore_put(&audio -> ux_device_class_audio_status_semaphore);
/* Resume interrupt thread. */
_ux_device_thread_resume(&audio -> ux_device_class_audio_class -> ux_slave_class_thread);
/* Return success. */
return(UX_SUCCESS);
#endif
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _uxe_device_class_audio_interrupt_send PORTABLE C */
/* 6.2.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks errors in queuing audio interrupt data */
/* function call. */
/* */
/* Note the interrupt data size is predefined and not checked: */
/* - for Audio 1.0 interrupt status word is 2 bytes */
/* - for Audio 2.0 interrupt data message is 6 bytes */
/* */
/* INPUT */
/* */
/* audio Address of audio instance */
/* int_data Interrupt data (2 or 6 bytes) */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_class_audio_interrupt_send Queue interrupt data to send */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _uxe_device_class_audio_interrupt_send(UX_DEVICE_CLASS_AUDIO *audio, UCHAR *int_data)
{
/* Sanity check. */
if (audio == UX_NULL || int_data == UX_NULL)
return(UX_INVALID_PARAMETER);
/* Send interrupt data. */
return(_ux_device_class_audio_interrupt_send(audio, int_data));
}
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