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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_disconnect 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 is called when the device gets disconnected from the */ |
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/* host. All the device resources are freed. */ |
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/* */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* None */ |
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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_class_entry_function) Device class entry function */ |
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/* (ux_slave_dcd_function) DCD dispatch function */ |
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/* _ux_device_stack_interface_delete Delete interface */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application */ |
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/* Device Stack */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_device_stack_disconnect(VOID) |
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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_INTERFACE *interface_ptr; |
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#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1 |
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UX_SLAVE_INTERFACE *next_interface; |
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#endif |
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UX_SLAVE_CLASS *class_ptr; |
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UX_SLAVE_CLASS_COMMAND class_command; |
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UINT status = UX_ERROR; |
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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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/* Get the pointer to the device. */ |
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device = &_ux_system_slave -> ux_system_slave_device; |
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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_DISCONNECT, device, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0) |
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/* If trace is enabled, register this object. */ |
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UX_TRACE_OBJECT_UNREGISTER(device); |
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/* If the device was in the configured state, there may be interfaces |
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attached to the configuration. */ |
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✓✓ |
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if (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED) |
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{ |
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/* Get the pointer to the first interface. */ |
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interface_ptr = device -> ux_slave_device_first_interface; |
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#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1 |
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/* Parse all the interfaces if any. */ |
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✓✓ |
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while (interface_ptr != UX_NULL) |
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{ |
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#endif |
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/* Build all the fields of the Class Command. */ |
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class_command.ux_slave_class_command_request = UX_SLAVE_CLASS_COMMAND_DEACTIVATE; |
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class_command.ux_slave_class_command_interface = (VOID *) interface_ptr; |
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/* Get the pointer to the class container of this interface. */ |
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class_ptr = interface_ptr -> ux_slave_interface_class; |
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/* Store the class container. */ |
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class_command.ux_slave_class_command_class_ptr = class_ptr; |
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/* If there is a class container for this instance, deactivate it. */ |
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✓✓ |
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if (class_ptr != UX_NULL) |
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/* Call the class with the DEACTIVATE signal. */ |
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class_ptr -> ux_slave_class_entry_function(&class_command); |
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#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1 |
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/* Get the next interface. */ |
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next_interface = interface_ptr -> ux_slave_interface_next_interface; |
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#endif |
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/* Remove the interface and all endpoints associated with it. */ |
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_ux_device_stack_interface_delete(interface_ptr); |
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#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1 |
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/* Now we refresh the interface pointer. */ |
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interface_ptr = next_interface; |
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} |
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#endif |
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/* Mark the device as attached now. */ |
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device -> ux_slave_device_state = UX_DEVICE_ATTACHED; |
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} |
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/* If the device was attached, we need to destroy the control endpoint. */ |
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✓✓ |
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if (device -> ux_slave_device_state == UX_DEVICE_ATTACHED) |
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/* Now we can destroy the default control endpoint. */ |
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status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_DESTROY_ENDPOINT, |
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(VOID *) &device -> ux_slave_device_control_endpoint); |
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/* We are reverting to configuration 0. */ |
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device -> ux_slave_device_configuration_selected = 0; |
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/* Set the device to be non attached. */ |
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device -> ux_slave_device_state = UX_DEVICE_RESET; |
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/* Check the status change callback. */ |
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✓✓ |
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if(_ux_system_slave -> ux_system_slave_change_function != UX_NULL) |
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{ |
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/* Inform the application if a callback function was programmed. */ |
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_ux_system_slave -> ux_system_slave_change_function(UX_DEVICE_REMOVED); |
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} |
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/* Return the status to the caller. */ |
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return(status); |
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} |
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