/***************************************************************************
 * 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                                                        */
/**                                                                       */
/**   ACM CDC Class                                                       */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/


/* Include necessary system files.  */

#define UX_SOURCE_CODE

#include "ux_api.h"
#include "ux_host_class_cdc_acm.h"
#include "ux_host_stack.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_host_class_cdc_acm_reception_stop               PORTABLE C      */
/*                                                           6.1.10       */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function stops background reception previously started by      */
/*    ux_host_class_cdc_acm_reception_start.                              */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    cdc_acm                               Pointer to cdc_acm class      */
/*    cdc_acm_reception                     Pointer to reception struct   */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_stack_endpoint_transfer_abort                              */
/*                                          Abort transfer                */
/*    _ux_host_semaphore_get                Get semaphore                 */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _ux_host_class_cdc_acm_reception_stop(UX_HOST_CLASS_CDC_ACM *cdc_acm,
                                    UX_HOST_CLASS_CDC_ACM_RECEPTION *cdc_acm_reception)
{

UX_TRANSFER              *transfer_request;

    /* If trace is enabled, insert this event into the trace buffer.  */
    UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_CDC_ACM_RECEPTION_STOP, cdc_acm, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)

    /* Ensure the instance is valid.  */
    if (cdc_acm -> ux_host_class_cdc_acm_state !=  UX_HOST_CLASS_INSTANCE_LIVE)
    {

        /* 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, cdc_acm, 0, 0, UX_TRACE_ERRORS, 0, 0)

        return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
    }

    /* As further protection, we must ensure this instance of the interface is the data interface and not
       the control interface !  */
    if (cdc_acm -> ux_host_class_cdc_acm_interface -> ux_interface_descriptor.bInterfaceClass != UX_HOST_CLASS_CDC_DATA_CLASS)
    {

        /* 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, cdc_acm, 0, 0, UX_TRACE_ERRORS, 0, 0)

        return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
    }

    /* Check if we do have transfers for this application. If none, nothing to do. */
    if (cdc_acm_reception -> ux_host_class_cdc_acm_reception_state ==  UX_HOST_CLASS_CDC_ACM_RECEPTION_STATE_STOPPED)
        return(UX_SUCCESS);

    /* We need to abort transactions on the bulk In pipe.  */
    _ux_host_stack_endpoint_transfer_abort(cdc_acm -> ux_host_class_cdc_acm_bulk_in_endpoint);

    /* Declare the reception stopped.  */
    cdc_acm_reception -> ux_host_class_cdc_acm_reception_state =  UX_HOST_CLASS_CDC_ACM_RECEPTION_STATE_STOPPED;

    /* Obtain pointer to transfer request.  */
    transfer_request = &cdc_acm -> ux_host_class_cdc_acm_bulk_in_endpoint -> ux_endpoint_transfer_request;

    /* Reset the completion callback function.  */
    transfer_request -> ux_transfer_request_completion_function = UX_NULL;

#if !defined(UX_HOST_STANDALONE)

    /* Clear semaphore counts that were (incorrectly) increased during each transfer
       completion.  */
    while _ux_system_semaphore_waiting(&(transfer_request -> ux_transfer_request_semaphore))
        _ux_host_semaphore_get(&transfer_request -> ux_transfer_request_semaphore, 0);
#endif

    /* This function never really fails.  */
    return(UX_SUCCESS);
}


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _uxe_host_class_cdc_acm_reception_stop              PORTABLE C      */
/*                                                           6.3.0        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks errors in CDC ACM reception function call.     */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    cdc_acm                               Pointer to CDC ACM class      */
/*    cdc_acm_reception                     Pointer to reception struct   */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Status                                                              */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_class_cdc_acm_reception_stop CDC ACM reception stop        */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _uxe_host_class_cdc_acm_reception_stop(UX_HOST_CLASS_CDC_ACM *cdc_acm,
                                    UX_HOST_CLASS_CDC_ACM_RECEPTION *cdc_acm_reception)
{

    /* Sanity checks.  */
    if ((cdc_acm == UX_NULL) || (cdc_acm_reception == UX_NULL))
        return(UX_INVALID_PARAMETER);

    /* Invoke CDC ACM reception function.  */
    return(_ux_host_class_cdc_acm_reception_stop(cdc_acm, cdc_acm_reception));
}
