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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Device Stack */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define UX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "ux_api.h" |
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#include "ux_device_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_device_stack_interface_delete PORTABLE C */ |
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/* 6.1.12 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function deletes an interface. Semaphore and memory are */ |
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/* released and the controller driver is invoked to disable the */ |
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/* hardware endpoint. The interface is then removed from the */ |
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/* configuration. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* interface Pointer to interface */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* (ux_slave_dcd_function) DCD dispatch function */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_device_stack_interface_delete(UX_SLAVE_INTERFACE *interface_ptr) |
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{ |
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UX_SLAVE_DCD *dcd; |
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UX_SLAVE_DEVICE *device; |
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UX_SLAVE_ENDPOINT *endpoint; |
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UX_SLAVE_ENDPOINT *next_endpoint; |
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/* If trace is enabled, register this object. */ |
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UX_TRACE_OBJECT_UNREGISTER(interface_ptr); |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_INTERFACE_DELETE, interface_ptr, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0) |
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/* Get the pointer to the device. */ |
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device = &_ux_system_slave -> ux_system_slave_device; |
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/* Find the first endpoints associated with this interface. */ |
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next_endpoint = interface_ptr -> ux_slave_interface_first_endpoint; |
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/* Parse all the endpoints. */ |
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✓✓ |
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while (next_endpoint != UX_NULL) |
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{ |
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/* Save this endpoint. */ |
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endpoint = next_endpoint; |
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/* Find the next endpoint. */ |
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next_endpoint = endpoint -> ux_slave_endpoint_next_endpoint; |
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/* Get the pointer to the DCD. */ |
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dcd = &_ux_system_slave->ux_system_slave_dcd; |
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/* The endpoint must be destroyed. */ |
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dcd -> ux_slave_dcd_function(dcd, UX_DCD_DESTROY_ENDPOINT, endpoint); |
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/* Free the endpoint. */ |
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endpoint -> ux_slave_endpoint_status = UX_UNUSED; |
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/* Make sure the endpoint instance is now cleaned up. */ |
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endpoint -> ux_slave_endpoint_state = 0; |
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endpoint -> ux_slave_endpoint_next_endpoint = UX_NULL; |
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endpoint -> ux_slave_endpoint_interface = UX_NULL; |
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endpoint -> ux_slave_endpoint_device = UX_NULL; |
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} |
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/* It's always from first one (to delete). */ |
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/* Rebuild the first link. */ |
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device -> ux_slave_device_first_interface = interface_ptr -> ux_slave_interface_next_interface; |
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/* The interface is removed from the link, its memory must be cleaned and returned to the pool. */ |
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interface_ptr -> ux_slave_interface_class = UX_NULL; |
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interface_ptr -> ux_slave_interface_class_instance = UX_NULL; |
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interface_ptr -> ux_slave_interface_next_interface = UX_NULL; |
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interface_ptr -> ux_slave_interface_first_endpoint = UX_NULL; |
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interface_ptr -> ux_slave_interface_status = UX_UNUSED; |
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/* Return successful completion. */ |
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return(UX_SUCCESS); |
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} |
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