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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** 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_disconnect PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when the device gets disconnected from the */
/* host. All the device resources are freed. */
/* */
/* */
/* INPUT */
/* */
/* None */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_slave_class_entry_function) Device class entry function */
/* (ux_slave_dcd_function) DCD dispatch function */
/* _ux_device_stack_interface_delete Delete interface */
/* */
/* CALLED BY */
/* */
/* Application */
/* Device Stack */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
/* optimized based on compile */
/* definitions, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_device_stack_disconnect(VOID)
{
UX_SLAVE_DCD *dcd;
UX_SLAVE_DEVICE *device;
UX_SLAVE_INTERFACE *interface;
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
UX_SLAVE_INTERFACE *next_interface;
#endif
UX_SLAVE_CLASS *class;
UX_SLAVE_CLASS_COMMAND class_command;
UINT status = UX_ERROR;
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_DISCONNECT, device, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(device);
/* If the device was in the configured state, there may be interfaces
attached to the configuration. */
if (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED)
{
/* Get the pointer to the first interface. */
interface = device -> ux_slave_device_first_interface;
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
/* Parse all the interfaces if any. */
while (interface != UX_NULL)
{
#endif
/* Build all the fields of the Class Command. */
class_command.ux_slave_class_command_request = UX_SLAVE_CLASS_COMMAND_DEACTIVATE;
class_command.ux_slave_class_command_interface = (VOID *) interface;
/* Get the pointer to the class container of this interface. */
class = interface -> ux_slave_interface_class;
/* Store the class container. */
class_command.ux_slave_class_command_class_ptr = class;
/* If there is a class container for this instance, deactivate it. */
if (class != UX_NULL)
/* Call the class with the DEACTIVATE signal. */
class -> ux_slave_class_entry_function(&class_command);
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
/* Get the next interface. */
next_interface = interface -> ux_slave_interface_next_interface;
#endif
/* Remove the interface and all endpoints associated with it. */
_ux_device_stack_interface_delete(interface);
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
/* Now we refresh the interface pointer. */
interface = next_interface;
}
#endif
/* Mark the device as attached now. */
device -> ux_slave_device_state = UX_DEVICE_ATTACHED;
}
/* If the device was attached, we need to destroy the control endpoint. */
if (device -> ux_slave_device_state == UX_DEVICE_ATTACHED)
/* Now we can destroy the default control endpoint. */
status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_DESTROY_ENDPOINT,
(VOID *) &device -> ux_slave_device_control_endpoint);
/* We are reverting to configuration 0. */
device -> ux_slave_device_configuration_selected = 0;
/* Set the device to be non attached. */
device -> ux_slave_device_state = UX_DEVICE_RESET;
/* Check the status change callback. */
if(_ux_system_slave -> ux_system_slave_change_function != UX_NULL)
{
/* Inform the application if a callback function was programmed. */
_ux_system_slave -> ux_system_slave_change_function(UX_DEVICE_REMOVED);
}
/* Return the status to the caller. */
return(status);
}