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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_configure PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function calls the USBX stack to do a SET_CONFIGURATION to the */
/* printer. Once the printer is configured, its interface will be */
/* activated. The bulk endpoints enumerated(1 IN, 1 OUT ). */
/* */
/* INPUT */
/* */
/* printer Pointer to printer class */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_configuration_interface_get Get interface */
/* _ux_host_stack_device_configuration_get Get configuration */
/* _ux_host_stack_device_configuration_select Select configuration */
/* */
/* CALLED BY */
/* */
/* _ux_host_class_printer_activate Printer class activate */
/* */
/**************************************************************************/
UINT _ux_host_class_printer_configure(UX_HOST_CLASS_PRINTER *printer)
{
UINT status;
UX_CONFIGURATION *configuration;
#if UX_MAX_DEVICES > 1
UX_DEVICE *parent_device;
#endif
/* If the device has been configured already, we don't need to do it
again. */
if (printer -> ux_host_class_printer_device -> ux_device_state == UX_DEVICE_CONFIGURED)
return(UX_SUCCESS);
/* A printer normally has one configuration. So retrieve the 1st configuration
only. */
status = _ux_host_stack_device_configuration_get(printer -> ux_host_class_printer_device, 0, &configuration);
if (status != UX_SUCCESS)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CONFIGURATION_HANDLE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_CONFIGURATION_HANDLE_UNKNOWN, printer -> ux_host_class_printer_device, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_CONFIGURATION_HANDLE_UNKNOWN);
}
#if UX_MAX_DEVICES > 1
/* Check the printer power source and check the parent power source for
incompatible connections. */
if (printer -> ux_host_class_printer_device -> ux_device_power_source == UX_DEVICE_BUS_POWERED)
{
/* Get parent device pointer. */
parent_device = printer -> ux_host_class_printer_device -> ux_device_parent;
/* If the device is NULL, the parent is the root printer and we don't have to worry
if the parent is not the root printer, check for its power source. */
if ((parent_device != UX_NULL) && (parent_device -> ux_device_power_source == UX_DEVICE_BUS_POWERED))
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CONNECTION_INCOMPATIBLE);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_CONNECTION_INCOMPATIBLE, printer, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_CONNECTION_INCOMPATIBLE);
}
}
#endif
/* We have the valid configuration. Ask the USBX stack to set this configuration. */
status = _ux_host_stack_device_configuration_select(configuration);
if (status != UX_SUCCESS)
return(status);
/* If the operation went well, the printer default alternate setting for the printer interface is
active and the interrupt endpoint is now enabled. We have to memorize the first interface since
the interrupt endpoint is hooked to it. */
status = _ux_host_stack_configuration_interface_get(configuration, 0, 0, &printer -> ux_host_class_printer_interface);
if (status != UX_SUCCESS)
{
/* Store the instance in the interface container, this is for the USB stack
when it needs to invoke the class. */
printer -> ux_host_class_printer_interface -> ux_interface_class_instance = (VOID *) printer;
}
/* Return completion status. */
return(status);
}
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