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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 */
/** */
/** Host Stack */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_stack_endpoint_instance_create PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will create an endpoint instance. The HCD layer is */
/* invoked to create each endpoint and the bandwidth claimed by each */
/* endpoint is allocated. */
/* */
/* INPUT */
/* */
/* endpoint Endpoint to delete */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_bandwidth_check Check bandwidth */
/* _ux_host_stack_bandwidth_claim Claim bandwidth */
/* _ux_utility_semaphore_create Semaphore create */
/* (ux_hcd_entry_function) HCD entry function */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/**************************************************************************/
UINT _ux_host_stack_endpoint_instance_create(UX_ENDPOINT *endpoint)
{
UX_HCD *hcd;
UINT status;
UCHAR endpoint_type;
/* Obtain the HCD for this endpoint. */
hcd = UX_DEVICE_HCD_GET(endpoint -> ux_endpoint_device);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_ENDPOINT_INSTANCE_CREATE, endpoint -> ux_endpoint_device, endpoint, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
/* If the endpoint needs guaranteed bandwidth, check if we have enough */
endpoint_type = (endpoint -> ux_endpoint_descriptor.bmAttributes) & UX_MASK_ENDPOINT_TYPE;
switch (endpoint_type)
{
case UX_CONTROL_ENDPOINT:
case UX_BULK_ENDPOINT:
break;
default:
/* Check the bandwidth for this endpoint */
if (_ux_host_stack_bandwidth_check(hcd, endpoint) != UX_SUCCESS)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_ENUMERATOR, UX_NO_BANDWIDTH_AVAILABLE);
return(UX_NO_BANDWIDTH_AVAILABLE);
}
break;
}
/* Create this endpoint. */
status = hcd -> ux_hcd_entry_function(hcd, UX_HCD_CREATE_ENDPOINT, (VOID *) endpoint);
/* Check status. */
if (status != UX_SUCCESS)
{
/* Return completion status. */
return(status);
}
/* Claim bandwidth if needed. */
if ((endpoint_type == UX_INTERRUPT_ENDPOINT) || (endpoint_type == UX_ISOCHRONOUS_ENDPOINT))
{
/* Claim its bandwidth */
_ux_host_stack_bandwidth_claim(hcd, endpoint);
}
/* Create a semaphore for this endpoint to be attached to its transfer request. */
status = _ux_host_semaphore_create(&endpoint -> ux_endpoint_transfer_request.ux_transfer_request_semaphore,
"ux_transfer_request_semaphore", 0);
/* Check status. */
if (status == UX_SUCCESS)
{
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_REGISTER(UX_TRACE_HOST_OBJECT_TYPE_ENDPOINT, endpoint, 0, 0, 0)
/* By default transfer request contained is for endpoint itself. */
endpoint -> ux_endpoint_transfer_request.ux_transfer_request_endpoint = endpoint;
}
/* Return completion status. */
return(status);
}
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