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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 */
/** */
/** PIMA Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_pima.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_pima_deactivate PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the pima has been */
/* removed from the bus either directly or indirectly. The bulk in\out */
/* and interrupt pipes will be destroyed and the instance removed. */
/* */
/* INPUT */
/* */
/* command PIMA class command pointer */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_class_instance_destroy Destroy the class instance */
/* _ux_host_stack_endpoint_transfer_abort Abort endpoint transfer */
/* _ux_utility_memory_free Free memory block */
/* */
/* CALLED BY */
/* */
/* _ux_host_class_pima_entry Entry of pima class */
/* */
/**************************************************************************/
UINT _ux_host_class_pima_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_PIMA *pima;
UX_HOST_CLASS_PIMA_SESSION *pima_session;
UX_TRANSFER *transfer_request;
/* Get the instance for this class. */
pima = (UX_HOST_CLASS_PIMA *) command -> ux_host_class_command_instance;
/* The pima is being shut down. */
pima -> ux_host_class_pima_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
/* We come to this point when the device has been extracted. So there may have been a transaction
being scheduled. We make sure the transaction has been completed by the controller driver.
When the device is extracted, the controller tries multiple times the transaction and retires it
with a DEVICE_NOT_RESPONDING error code.
First we take care of endpoint IN. */
transfer_request = &pima -> ux_host_class_pima_bulk_in_endpoint -> ux_endpoint_transfer_request;
if (transfer_request -> ux_transfer_request_completion_code == UX_TRANSFER_STATUS_PENDING)
/* We need to abort transactions on the bulk In pipe. */
_ux_host_stack_endpoint_transfer_abort(pima -> ux_host_class_pima_bulk_in_endpoint);
/* Then endpoint OUT. */
transfer_request = &pima -> ux_host_class_pima_bulk_out_endpoint -> ux_endpoint_transfer_request;
if (transfer_request -> ux_transfer_request_completion_code == UX_TRANSFER_STATUS_PENDING)
/* We need to abort transactions on the bulk Out pipe. We normally don't need that anymore. */
_ux_host_stack_endpoint_transfer_abort(pima -> ux_host_class_pima_bulk_out_endpoint);
/* Then interrupt endpoint. */
if (pima -> ux_host_class_pima_interrupt_endpoint != UX_NULL)
{
transfer_request = &pima -> ux_host_class_pima_interrupt_endpoint -> ux_endpoint_transfer_request;
if (transfer_request -> ux_transfer_request_completion_code == UX_TRANSFER_STATUS_PENDING)
/* We need to abort transactions on the Interrupt pipe. */
_ux_host_stack_endpoint_transfer_abort(pima -> ux_host_class_pima_interrupt_endpoint);
/* Free the interrupt transfer buffer. */
_ux_utility_memory_free(transfer_request -> ux_transfer_request_data_pointer);
}
/* 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);
/* Free the header container buffer. */
if (pima -> ux_host_class_pima_container != UX_NULL)
_ux_utility_memory_free(pima -> ux_host_class_pima_container);
/* Free the event data buffer. */
if (pima -> ux_host_class_pima_event_buffer != UX_NULL)
_ux_utility_memory_free(pima -> ux_host_class_pima_event_buffer);
/* Get the pointer to the PIMA session. */
pima_session = pima -> ux_host_class_pima_session;
/* Was there a PIMA session ? */
if(pima_session != UX_NULL)
{
/* Clean the PIMA session and free the storage ID buffer in the session if it is opened. */
if ((pima_session -> ux_host_class_pima_session_magic == UX_HOST_CLASS_PIMA_MAGIC_NUMBER) &&
(pima_session -> ux_host_class_pima_session_state == UX_HOST_CLASS_PIMA_SESSION_STATE_OPENED))
{
/* Reset the magic field. */
pima_session -> ux_host_class_pima_session_magic = 0;
/* Declare the session closed. */
pima_session -> ux_host_class_pima_session_state = UX_HOST_CLASS_PIMA_SESSION_STATE_CLOSED;
}
}
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(pima -> ux_host_class_pima_class, (VOID *) pima);
/* 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, pima -> ux_host_class_pima_class, (VOID *) pima);
}
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_PIMA_DEACTIVATE, pima, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(pima);
/* Free the pima instance memory. */
_ux_utility_memory_free(pima);
/* Return successful status. */
return(UX_SUCCESS);
}
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