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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 Stack */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_stack_transfer_abort PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function aborts a pending transfer request that has been */
/* previously submitted. This function only cancels a specific */
/* transfer request. */
/* */
/* The call back to the function will have the */
/* UX_TRANSFER_STATUS_ABORT status */
/* */
/* INPUT */
/* */
/* transfer_request Pointer to transfer request */
/* completion_code Completion code */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_utility_semaphore_put Put semaphore */
/* */
/* CALLED BY */
/* */
/* Application */
/* Device Stack */
/* */
/**************************************************************************/
UINT _ux_device_stack_transfer_abort(UX_SLAVE_TRANSFER *transfer_request, ULONG completion_code)
{
UX_INTERRUPT_SAVE_AREA
UX_SLAVE_DCD *dcd;
UX_PARAMETER_NOT_USED(completion_code);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_TRANSFER_ABORT, transfer_request, completion_code, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Sets the completion code due to bus reset. */
transfer_request -> ux_slave_transfer_request_completion_code = completion_code;
/* Ensure we're not preempted by the transfer completion ISR. */
UX_DISABLE
/* It's possible the transfer already completed. Ensure it hasn't before doing the abort. */
if (transfer_request -> ux_slave_transfer_request_status == UX_TRANSFER_STATUS_PENDING)
{
/* Call the DCD if necessary for cleaning up the pending transfer. */
dcd -> ux_slave_dcd_function(dcd, UX_DCD_TRANSFER_ABORT, (VOID *) transfer_request);
/* Restore interrupts. Note that the transfer request should not be modified now. */
UX_RESTORE
/* We need to set the completion code for the transfer to aborted. Note
that the transfer request function cannot simultaneously modify this
because if the transfer was pending, then the transfer's thread is
currently waiting for it to complete. */
transfer_request -> ux_slave_transfer_request_status = UX_TRANSFER_STATUS_ABORT;
/* Wake up the device driver who is waiting on the semaphore. */
_ux_device_semaphore_put(&transfer_request -> ux_slave_transfer_request_semaphore);
}
else
{
/* Restore interrupts. */
UX_RESTORE
}
/* This function never fails. */
return(UX_SUCCESS);
}
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