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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 */
/** */
/** Video Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_video.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_video_control_value_get PORTABLE C */
/* 6.1.11 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function obtains the current values for a single video control.*/
/* */
/* INPUT */
/* */
/* video Pointer to video class */
/* video_control Pointer to video control */
/* */
/* 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_semaphore_put Release semaphore */
/* _ux_utility_memory_allocate Allocate memory block */
/* _ux_utility_memory_free Release memory block */
/* _ux_utility_short_get Read 16-bit value */
/* _ux_system_error_handler Log system error */
/* */
/* CALLED BY */
/* */
/* Application */
/* Video Class */
/* */
/**************************************************************************/
UINT _ux_host_class_video_control_value_get(UX_HOST_CLASS_VIDEO *video, UX_HOST_CLASS_VIDEO_CONTROL *video_control)
{
UX_ENDPOINT *control_endpoint;
UX_TRANSFER *transfer_request;
UINT status;
UCHAR * control_buffer;
/* Ensure the instance is valid. */
if (_ux_host_stack_class_instance_verify(_ux_system_host_class_video_name, (VOID *) video) != 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, video, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
}
/* Protect thread reentry to this instance. */
status = _ux_host_semaphore_get(&video -> ux_host_class_video_semaphore, UX_WAIT_FOREVER);
if (status != UX_SUCCESS)
return(status);
/* We need to get the default control endpoint transfer request pointer. */
control_endpoint = &video -> ux_host_class_video_device -> ux_device_control_endpoint;
transfer_request = &control_endpoint -> ux_endpoint_transfer_request;
/* Need to allocate memory for the control buffer. */
control_buffer = _ux_utility_memory_allocate(UX_SAFE_ALIGN, UX_CACHE_SAFE_MEMORY, 2);
if (control_buffer == UX_NULL)
{
/* Unprotect thread reentry to this instance. */
_ux_host_semaphore_put(&video -> ux_host_class_video_semaphore);
/* Return an error. */
return(UX_MEMORY_INSUFFICIENT);
}
/* Protect the control endpoint semaphore here. It will be unprotected in the
transfer request function. */
status = _ux_host_semaphore_get(&video -> ux_host_class_video_device -> ux_device_protection_semaphore, UX_WAIT_FOREVER);
/* Check for status. */
if (status != UX_SUCCESS)
/* Something went wrong. */
return(status);
/* Create a transfer request for the GET_MIN request. */
transfer_request -> ux_transfer_request_data_pointer = control_buffer;
transfer_request -> ux_transfer_request_requested_length = 2;
transfer_request -> ux_transfer_request_function = UX_HOST_CLASS_VIDEO_GET_CUR;
transfer_request -> ux_transfer_request_type = UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE;
transfer_request -> ux_transfer_request_value = (video_control -> ux_host_class_video_control << 8);
transfer_request -> ux_transfer_request_index = video -> ux_host_class_video_control_interface_number | (video -> ux_host_class_video_feature_unit_id << 8);
/* Send request to HCD layer. */
status = _ux_host_stack_transfer_request(transfer_request);
/* Check for correct transfer and entire control buffer returned. */
if ((status == UX_SUCCESS) && (transfer_request -> ux_transfer_request_actual_length == 2))
{
/* Update the MIN static value for the caller. */
video_control -> ux_host_class_video_control_cur = (LONG)(SHORT)_ux_utility_short_get(control_buffer);
}
else
{
/* Free the previous control buffer. */
_ux_utility_memory_free(control_buffer);
/* Unprotect thread reentry to this instance. */
_ux_host_semaphore_put(&video -> ux_host_class_video_semaphore);
/* Return completion status. */
return(UX_TRANSFER_ERROR);
}
/* Free all used resources. */
_ux_utility_memory_free(control_buffer);
/* Unprotect thread reentry to this instance. */
_ux_host_semaphore_put(&video -> ux_host_class_video_semaphore);
/* Return completion status. */
return(status);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _uxe_host_class_video_control_value_get PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Yajun Xia, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks errors in video control value get function */
/* call. */
/* */
/* INPUT */
/* */
/* video Pointer to video class */
/* video_control Pointer to video control */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_class_video_control_value_get */
/* Get the video control value */
/* */
/* CALLED BY */
/* */
/* Application */
/* Video Class */
/* */
/**************************************************************************/
UINT _uxe_host_class_video_control_value_get(UX_HOST_CLASS_VIDEO *video, UX_HOST_CLASS_VIDEO_CONTROL *video_control)
{
/* Sanity Checks. */
if ((video == UX_NULL) || (video_control == UX_NULL))
return(UX_INVALID_PARAMETER);
/* Call the actual video control value get function. */
return(_ux_host_class_video_control_value_get(video, video_control));
}
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