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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 */
/** */
/** HUB Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_hub.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_hub_deactivate PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the HUB has been */
/* removed from the bus either directly or indirectly. The interrupt */
/* pipe will be destroyed and the instance removed. */
/* */
/* INPUT */
/* */
/* command Pointer to class command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_destroy Destroy class instance */
/* _ux_host_stack_device_remove Remove device */
/* _ux_host_stack_endpoint_transfer_abort */
/* Abort transfer */
/* _ux_utility_memory_free Release memory block */
/* _ux_host_semaphore_get Get semaphore */
/* _ux_host_semaphore_put Release semaphore */
/* _ux_utility_thread_schedule_other Schedule other threads */
/* */
/* CALLED BY */
/* */
/* HUB Class */
/* */
/**************************************************************************/
UINT _ux_host_class_hub_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_HUB *hub;
UX_HCD *hcd;
UX_TRANSFER *transfer_request = UX_NULL;
UINT port_index;
/* Get the instance to the class. */
hub = (UX_HOST_CLASS_HUB *) command -> ux_host_class_command_instance;
/* Get the HCD used by this instance. */
hcd = UX_DEVICE_HCD_GET(hub -> ux_host_class_hub_device);
/* The HUB is being shut down. */
hub -> ux_host_class_hub_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
/* We need to abort transactions on the interrupt pipe. */
#if defined(UX_HOST_STANDALONE)
if (hub -> ux_host_class_hub_interrupt_endpoint)
#endif
{
_ux_host_stack_endpoint_transfer_abort(hub -> ux_host_class_hub_interrupt_endpoint);
/* If the Hub class instance has a interrupt pipe with a data payload associated with it
it must be freed. First get the transfer request. */
transfer_request = &hub -> ux_host_class_hub_interrupt_endpoint -> ux_endpoint_transfer_request;
}
/* Each device which is downstream on the HUB ports must be removed. */
for (port_index = 1; port_index <= hub -> ux_host_class_hub_descriptor.bNbPorts; port_index++)
{
/* Is there a device on this port? */
if (hub -> ux_host_class_hub_port_state & (1UL << port_index))
{
/* The stack will remove the device and its resources. */
_ux_host_stack_device_remove(hcd, hub -> ux_host_class_hub_device, port_index);
}
}
/* The enumeration thread needs to sleep a while to allow the application or the class that may be using
endpoints to exit properly. */
_ux_host_thread_schedule_other(UX_THREAD_PRIORITY_ENUM);
/* Then de allocate the memory. */
#if defined(UX_HOST_STANDALONE)
if (transfer_request)
#endif
_ux_utility_memory_free(transfer_request -> ux_transfer_request_data_pointer);
#if defined(UX_HOST_STANDALONE)
if (hub -> ux_host_class_hub_allocated)
{
_ux_utility_memory_free(hub -> ux_host_class_hub_allocated);
}
#endif
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(hub -> ux_host_class_hub_class, (VOID *) hub);
/* Before we free the device resources, we need to inform the application
that the device is removed. */
if (_ux_system_host -> ux_system_host_change_function != UX_NULL)
{
/* Inform the application the device is removed. */
_ux_system_host -> ux_system_host_change_function(UX_DEVICE_REMOVAL, hub -> ux_host_class_hub_class, (VOID *) hub);
}
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_HUB_DEACTIVATE, hub, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(hub);
#if defined(UX_HOST_STANDALONE)
/* Unlink from device class instance. */
hub -> ux_host_class_hub_device -> ux_device_class_instance = (VOID *) hub;
#endif
/* Free the memory block used by the class. */
_ux_utility_memory_free(hub);
/* Return successful completion. */
return(UX_SUCCESS);
}
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