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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_interface_delete PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deletes an interface. Semaphore and memory are */
/* released and the controller driver is invoked to disable the */
/* hardware endpoint. The interface is then removed from the */
/* configuration. */
/* */
/* INPUT */
/* */
/* interface Pointer to interface */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_slave_dcd_function) DCD dispatch function */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_device_stack_interface_delete(UX_SLAVE_INTERFACE *interface)
{
UX_SLAVE_DCD *dcd;
UX_SLAVE_DEVICE *device;
UX_SLAVE_ENDPOINT *endpoint;
UX_SLAVE_ENDPOINT *next_endpoint;
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(interface);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_INTERFACE_DELETE, interface, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Find the first endpoints associated with this interface. */
next_endpoint = interface -> ux_slave_interface_first_endpoint;
/* Parse all the endpoints. */
while (next_endpoint != UX_NULL)
{
/* Save this endpoint. */
endpoint = next_endpoint;
/* Find the next endpoint. */
next_endpoint = endpoint -> ux_slave_endpoint_next_endpoint;
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave->ux_system_slave_dcd;
/* The endpoint must be destroyed. */
dcd -> ux_slave_dcd_function(dcd, UX_DCD_DESTROY_ENDPOINT, endpoint);
/* Free the endpoint. */
endpoint -> ux_slave_endpoint_status = UX_UNUSED;
/* Make sure the endpoint instance is now cleaned up. */
endpoint -> ux_slave_endpoint_state = 0;
endpoint -> ux_slave_endpoint_next_endpoint = UX_NULL;
endpoint -> ux_slave_endpoint_interface = UX_NULL;
endpoint -> ux_slave_endpoint_device = UX_NULL;
}
/* It's always from first one (to delete). */
/* Rebuild the first link. */
device -> ux_slave_device_first_interface = interface -> ux_slave_interface_next_interface;
/* The interface is removed from the link, its memory must be cleaned and returned to the pool. */
interface -> ux_slave_interface_class = UX_NULL;
interface -> ux_slave_interface_class_instance = UX_NULL;
interface -> ux_slave_interface_next_interface = UX_NULL;
interface -> ux_slave_interface_first_endpoint = UX_NULL;
interface -> ux_slave_interface_status = UX_UNUSED;
/* Return successful completion. */
return(UX_SUCCESS);
}