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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_endpoint_stall PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function stalls an endpoint. The host will need to reissue */
/* a reset to clear the endpoint. */
/* */
/* INPUT */
/* */
/* endpoint Pointer to endpoint */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_slave_dcd_function) DCD dispatch function */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _ux_device_stack_endpoint_stall(UX_SLAVE_ENDPOINT *endpoint)
{
UX_INTERRUPT_SAVE_AREA
UX_SLAVE_DCD *dcd;
UINT status;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_ENDPOINT_STALL, endpoint, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Assume device is in an invalid state here in order to reduce code in following
section where interrupts are disabled. */
status = UX_ERROR;
/* Ensure we don't change the endpoint's state after disconnection routine
resets it. */
UX_DISABLE
/* Check if the device is in a valid state; as soon as the device is out
of the RESET state, transfers occur and thus endpoints may be stalled. */
if (_ux_system_slave -> ux_system_slave_device.ux_slave_device_state != UX_DEVICE_RESET &&
endpoint -> ux_slave_endpoint_state != UX_ENDPOINT_HALTED)
{
/* Stall the endpoint. */
status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint);
/* Mark the endpoint state. */
if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) !=
UX_CONTROL_ENDPOINT)
endpoint -> ux_slave_endpoint_state = UX_ENDPOINT_HALTED;
}
/* Restore interrupts. */
UX_RESTORE
/* Return completion status. */
return(status);
}
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