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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Host Stack */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/* Include necessary system files. */ |
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#define UX_SOURCE_CODE |
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#include "ux_api.h" |
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#include "ux_host_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_host_stack_class_interface_scan PORTABLE C */ |
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/* 6.1.4 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function will scan all default interfaces for a single */ |
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/* configuration and call the registered class with the */ |
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/* Class/SubClass/Protocol of the interface. */ |
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/* */ |
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/* If the device has multiple configurations (like the Apple iPod), */ |
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/* the first configuration is treated as the default configuration. */ |
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/* If a device which has multiple configurations wants to control the */ |
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/* configuration selection, it must ensure that the PID/VID based */ |
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/* class at the device level claims the entire device. */ |
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/* */ |
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/* */ |
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/* For the interface, there is no reason to use the PID/VID has a */ |
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/* binding element as classes that trigger on PID/VID will be called */ |
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/* by the device descriptor scanning process. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* device Device pointer */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Result of operation */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_host_stack_class_call Call class command */ |
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/* _ux_host_stack_device_configuration_select */ |
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/* Select configuration */ |
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/* (ux_host_stack_class_call) Call class from host stack */ |
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/* (ux_host_class_entry_function) Class entry function */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* USBX Components */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
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/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* 02-02-2021 Chaoqiong Xiao Modified comment(s), */ |
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/* used internal function call */ |
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/* to scan interfaces, */ |
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/* resulting in version 6.1.4 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_host_stack_class_interface_scan(UX_DEVICE *device) |
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{ |
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UX_CONFIGURATION *configuration; |
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UINT status; |
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/* Get the 1st and only configuration. If the device has multiple |
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configurations, we simply use the first one as default. */ |
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configuration = device -> ux_device_first_configuration; |
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✓✓ |
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if (configuration == UX_NULL) |
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return(UX_ERROR); |
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/* Scan interfaces for this configuration. */ |
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status = _ux_host_stack_configuration_interface_scan(configuration); |
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/* Return operation result. */ |
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return(status); |
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} |
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