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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 */
/** */
/** Printer Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_printer.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_printer_deactivate PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when this instance of the printer has been */
/* removed from the bus either directly or indirectly. The bulk in\out */
/* pipes will be destroyed and the instanced removed. */
/* */
/* INPUT */
/* */
/* command Printer 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 */
/* _ux_host_semaphore_get Get protection semaphore */
/* _ux_host_semaphore_delete Delete protection semaphore */
/* _ux_utility_thread_schedule_other Schedule other threads */
/* */
/* CALLED BY */
/* */
/* _ux_host_class_printer_entry Entry of printer class */
/* */
/**************************************************************************/
UINT _ux_host_class_printer_deactivate(UX_HOST_CLASS_COMMAND *command)
{
UX_HOST_CLASS_PRINTER *printer;
#if !defined(UX_HOST_STANDALONE)
UINT status;
#endif
/* Get the instance for this class. */
printer = (UX_HOST_CLASS_PRINTER *) command -> ux_host_class_command_instance;
/* The printer is being shut down. */
printer -> ux_host_class_printer_state = UX_HOST_CLASS_INSTANCE_SHUTDOWN;
#if !defined(UX_HOST_STANDALONE)
/* Protect thread reentry to this instance. */
status = _ux_host_semaphore_get(&printer -> ux_host_class_printer_semaphore, UX_WAIT_FOREVER);
if (status != UX_SUCCESS)
/* Return error. */
return(status);
#endif
/* We need to abort transactions on the bulk out pipe. */
_ux_host_stack_endpoint_transfer_abort(printer -> ux_host_class_printer_bulk_out_endpoint);
/* If the printer is bidirectional, we need to abort transactions on the bulk in pipe. */
if (printer -> ux_host_class_printer_interface -> ux_interface_descriptor.bInterfaceProtocol == UX_HOST_CLASS_PRINTER_PROTOCOL_BI_DIRECTIONAL)
_ux_host_stack_endpoint_transfer_abort(printer -> ux_host_class_printer_bulk_in_endpoint);
#if !defined(UX_HOST_STANDALONE)
/* 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);
#else
/* Free allocated memory. */
if (printer -> ux_host_class_printer_allocated)
_ux_utility_memory_free(printer -> ux_host_class_printer_allocated);
#endif
/* Destroy the instance. */
_ux_host_stack_class_instance_destroy(printer -> ux_host_class_printer_class, (VOID *) printer);
#if !defined(UX_HOST_STANDALONE)
/* Destroy the semaphore. */
_ux_host_semaphore_delete(&printer -> ux_host_class_printer_semaphore);
#endif
/* 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, printer -> ux_host_class_printer_class, (VOID *) printer);
}
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_PRINTER_DEACTIVATE, printer, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(printer);
/* Free the printer instance memory. */
_ux_utility_memory_free(printer);
/* Return successful status. */
return(UX_SUCCESS);
}
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