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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_control_request PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function issue audio specific control request. */
/* */
/* INPUT */
/* */
/* audio Pointer to audio class */
/* streaming_control 0 for control requests */
/* 1 for streaming requests */
/* request_type bmRequestType */
/* request bRequest */
/* request_value wValue can be: */
/* (CS << 8) | CN or */
/* (ICN << 8) | OCN or */
/* (MU_MIXER_CONTROL << 8) | MCN */
/* or other specific value. */
/* spec_id Entity/Language ID (if used) */
/* parameter Pointer to request parameters */
/* parameter_size Request parameters length */
/* actual_size Actual processed size */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_verify Verify instance is valid */
/* _ux_host_stack_transfer_request Process transfer request */
/* _ux_host_semaphore_get Get semaphore */
/* _ux_host_mutex_on Get mutex */
/* _ux_host_mutex_off Release mutex */
/* */
/* CALLED BY */
/* */
/* Application */
/* Audio Class */
/* */
/**************************************************************************/
UINT _ux_host_class_audio_control_request(UX_HOST_CLASS_AUDIO *audio,
UINT streaming_control,
UINT request_type, UINT request,
UINT request_value,
UINT spec_id,
UCHAR *parameter, ULONG parameter_size, ULONG *actual_size)
{
UX_ENDPOINT *control_endpoint;
UX_TRANSFER *transfer_request;
ULONG request_index = 0;
UINT status;
/* Ensure the instance is valid. */
if (_ux_host_stack_class_instance_verify(_ux_system_host_class_audio_name, (VOID *) audio) != UX_SUCCESS)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_INSTANCE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, audio, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
}
/* Check request settings. */
switch(request_type & UX_REQUEST_TARGET)
{
case UX_REQUEST_TARGET_INTERFACE:
request_index = streaming_control ?
audio -> ux_host_class_audio_streaming_interface -> ux_interface_descriptor.bInterfaceNumber :
audio -> ux_host_class_audio_control_interface_number;
break;
case UX_REQUEST_TARGET_ENDPOINT:
request_index = audio -> ux_host_class_audio_isochronous_endpoint -> ux_endpoint_descriptor.bEndpointAddress;
break;
default:
return(UX_INVALID_PARAMETER);
}
/* Protect thread reentry to this instance. */
_ux_host_mutex_on(&audio -> ux_host_class_audio_mutex);
/* We need to get the default control endpoint transfer request pointer. */
control_endpoint = &audio -> ux_host_class_audio_device -> ux_device_control_endpoint;
transfer_request = &control_endpoint -> ux_endpoint_transfer_request;
/* Protect the control endpoint semaphore here. It will be unprotected in the
transfer request function. */
status = _ux_host_semaphore_get(&audio -> ux_host_class_audio_device -> ux_device_protection_semaphore, UX_WAIT_FOREVER);
/* Check for status. */
if (status != UX_SUCCESS)
{
/* Something went wrong. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
return(status);
}
/* Create a transfer request for the specific setting. */
transfer_request -> ux_transfer_request_data_pointer = parameter;
transfer_request -> ux_transfer_request_requested_length = parameter_size;
transfer_request -> ux_transfer_request_function = request;
transfer_request -> ux_transfer_request_type = request_type;
transfer_request -> ux_transfer_request_value = request_value;
transfer_request -> ux_transfer_request_index = request_index | (spec_id << 8);
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* Save actual size. */
if (actual_size)
*actual_size = transfer_request -> ux_transfer_request_actual_length;
/* Unprotect thread reentry to this instance. */
_ux_host_mutex_off(&audio -> ux_host_class_audio_mutex);
/* Return completion status. */
return(status);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _uxe_host_class_audio_control_request PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks errors in audio control request function call. */
/* */
/* INPUT */
/* */
/* audio Pointer to audio class */
/* streaming_control 0 for control requests */
/* 1 for streaming requests */
/* request_type bmRequestType */
/* request bRequest */
/* request_value wValue can be: */
/* (CS << 8) | CN or */
/* (ICN << 8) | OCN or */
/* (MU_MIXER_CONTROL << 8) | MCN */
/* or other specific value. */
/* spec_id Entity/Language ID (if used) */
/* parameter Pointer to request parameters */
/* parameter_size Request parameters length */
/* actual_size Actual processed size */
/* */
/* OUTPUT */
/* */
/* Status */
/* */
/* CALLS */
/* */
/* _ux_host_class_audio_control_request Get audio control request */
/* */
/* CALLED BY */
/* */
/* Application */
/* Audio Class */
/* */
/**************************************************************************/
UINT _uxe_host_class_audio_control_request(UX_HOST_CLASS_AUDIO *audio,
UINT streaming_control,
UINT request_type, UINT request,
UINT request_value,
UINT spec_id,
UCHAR *parameter, ULONG parameter_size, ULONG *actual_size)
{
/* Sanity check. */
if ((audio == UX_NULL))
return(UX_INVALID_PARAMETER);
/* Invoke audio control request function. */
return(_ux_host_class_audio_control_request(audio,
streaming_control,
request_type, request, request_value,
spec_id, parameter, parameter_size, actual_size));
}
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