/***************************************************************************
 * 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                                                        */
/**                                                                       */
/**   Host Sierra Wireless AR module class                                */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/


/* Include necessary system files.  */

#define UX_SOURCE_CODE

#include "ux_api.h"
#include "ux_host_class_swar.h"
#include "ux_host_stack.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_host_class_swar_reception_start                 PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function starts a reception with the Sierra modem. This way    */
/*    allows for non blocking calls based on a packet orientated round    */
/*    robbin buffer. When a packet is fully or partially received, an     */
/*    application callback function is invoked and a new transfer request */
/*    is rescheduled.                                                     */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    swar                               Pointer to swar class            */
/*    swar_reception                     Pointer to reception struct      */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_stack_class_instance_verify  Verify the class instance     */
/*    _ux_host_stack_transfer_request       Process transfer request      */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _ux_host_class_swar_reception_start (UX_HOST_CLASS_SWAR *swar,
                                    UX_HOST_CLASS_SWAR_RECEPTION *swar_reception)
{

UX_TRANSFER     *transfer_request;
UINT            status;

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

    /* Ensure the instance is valid.  */
    if (_ux_host_stack_class_instance_verify(_ux_system_host_class_swar_name, (VOID *) swar) != 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, swar, 0, 0, UX_TRACE_ERRORS, 0, 0)

        return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
    }

    /* Start by aligning the head and tail of buffers to the same address supplied by the application.  */
    swar_reception -> ux_host_class_swar_reception_data_head =  swar_reception -> ux_host_class_swar_reception_data_buffer;
    swar_reception -> ux_host_class_swar_reception_data_tail =  swar_reception -> ux_host_class_swar_reception_data_buffer;

    /* Get the pointer to the bulk in endpoint in the transfer_request.  */
    transfer_request =  &swar -> ux_host_class_swar_bulk_in_endpoint -> ux_endpoint_transfer_request;

    /* Initialize the transfer request.  */
    transfer_request -> ux_transfer_request_class_instance      =  (VOID *) swar;
    transfer_request -> ux_transfer_request_data_pointer        =  swar_reception -> ux_host_class_swar_reception_data_head;
    transfer_request -> ux_transfer_request_requested_length    =  swar_reception -> ux_host_class_swar_reception_block_size;
    transfer_request -> ux_transfer_request_completion_function =  _ux_host_class_swar_reception_callback;

    /* Save the acm reception structure in the acm structure.  */
    swar -> ux_host_class_swar_reception = swar_reception;

    /* And declare we have a transfer in progress.  */
    swar_reception -> ux_host_class_swar_reception_state =  UX_HOST_CLASS_SWAR_RECEPTION_STATE_STARTED;

    /* Arm a first transfer on the bulk in endpoint. There is a callback to this function so we return to the caller
       right away. */
    status =  _ux_host_stack_transfer_request(transfer_request);

    /* We do not know if the first transfer was successful yet.  If the status is not OK, we need to stop the transfer
       in progress flag. */
    if (status != UX_SUCCESS)
        swar_reception -> ux_host_class_swar_reception_state =  UX_HOST_CLASS_SWAR_RECEPTION_STATE_STOPPED;

    return(status);
}


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _uxe_host_class_swar_reception_start                PORTABLE C      */
/*                                                           6.3.0        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks errors in SWAR reception function call.        */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    swar                                  Pointer to SWAR class         */
/*    swar_reception                        Pointer to reception struct   */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Status                                                              */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_class_swar_reception_start                                 */
/*                                          SWAR reception start          */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _uxe_host_class_swar_reception_start (UX_HOST_CLASS_SWAR *swar,
                                    UX_HOST_CLASS_SWAR_RECEPTION *swar_reception)
{

    /* Sanity checks.  */
    if ((swar == UX_NULL) || (swar_reception == UX_NULL))
        return(UX_INVALID_PARAMETER);

    /* Invoke SWAR reception start function.  */
    return(_ux_host_class_swar_reception_start(swar, swar_reception));
}
