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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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/** Device Stack */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define UX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "ux_api.h" |
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#include "ux_device_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_device_stack_clear_feature PORTABLE C */ |
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/* 6.1.12 */ |
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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 clears a specific feature (Device, Interface, */ |
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/* Endpoint ....). */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* request_type Request type */ |
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/* request_value Request value */ |
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/* request_index Request index */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* (ux_slave_dcd_function) DCD dispatch function */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Device Stack */ |
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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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/* optimized based on compile */ |
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/* definitions, */ |
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/* resulting in version 6.1 */ |
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/* 07-29-2022 Chaoqiong Xiao Modified comment(s), */ |
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/* fixed parameter/variable */ |
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/* names conflict C++ keyword, */ |
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/* resulting in version 6.1.12 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_device_stack_clear_feature(ULONG request_type, ULONG request_value, ULONG request_index) |
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{ |
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UX_SLAVE_DCD *dcd; |
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UX_SLAVE_DEVICE *device; |
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UX_SLAVE_INTERFACE *interface_ptr; |
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UX_SLAVE_ENDPOINT *endpoint; |
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UX_SLAVE_ENDPOINT *endpoint_target; |
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UX_PARAMETER_NOT_USED(request_value); |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_CLEAR_FEATURE, request_type, request_value, request_index, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0) |
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/* Get the pointer to the DCD. */ |
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dcd = &_ux_system_slave -> ux_system_slave_dcd; |
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/* Get the pointer to the device. */ |
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device = &_ux_system_slave -> ux_system_slave_device; |
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/* Get the control endpoint for the device. */ |
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endpoint = &device -> ux_slave_device_control_endpoint; |
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/* The request can be for either the device or the endpoint. */ |
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✓✓✓ |
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switch (request_type & UX_REQUEST_TARGET) |
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{ |
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case UX_REQUEST_TARGET_DEVICE: |
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/* Check if we have a DEVICE_REMOTE_WAKEUP Feature. */ |
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✓✓ |
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if (request_value == UX_REQUEST_FEATURE_DEVICE_REMOTE_WAKEUP) |
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{ |
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/* Check if we have the capability. */ |
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✓✓ |
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if (_ux_system_slave -> ux_system_slave_remote_wakeup_capability) |
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{ |
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/* Disable the feature. */ |
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_ux_system_slave -> ux_system_slave_remote_wakeup_enabled = UX_FALSE; |
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} |
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else |
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/* Protocol error. */ |
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return (UX_FUNCTION_NOT_SUPPORTED); |
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} |
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break; |
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case UX_REQUEST_TARGET_ENDPOINT: |
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/* The only clear feature for endpoint is ENDPOINT_STALL. This clears |
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the endpoint of the stall situation and resets its data toggle. |
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We need to find the endpoint through the interface(s). */ |
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interface_ptr = device -> ux_slave_device_first_interface; |
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#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1 |
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✓✓ |
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while (interface_ptr != UX_NULL) |
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{ |
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#endif |
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/* Get the first endpoint for this interface. */ |
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endpoint_target = interface_ptr -> ux_slave_interface_first_endpoint; |
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/* Parse all the endpoints. */ |
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✓✓ |
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while (endpoint_target != UX_NULL) |
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{ |
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/* Check the endpoint index. */ |
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✓✓ |
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if (endpoint_target -> ux_slave_endpoint_descriptor.bEndpointAddress == request_index) |
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{ |
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/* Reset the endpoint. */ |
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dcd -> ux_slave_dcd_function(dcd, UX_DCD_RESET_ENDPOINT, endpoint_target); |
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/* Mark its state now. */ |
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endpoint_target -> ux_slave_endpoint_state = UX_ENDPOINT_RESET; |
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/* Return the function status. */ |
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return(UX_SUCCESS); |
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} |
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/* Next endpoint. */ |
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endpoint_target = endpoint_target -> ux_slave_endpoint_next_endpoint; |
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} |
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#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1 |
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/* Next interface. */ |
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interface_ptr = interface_ptr -> ux_slave_interface_next_interface; |
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} |
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#endif |
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/* Intentional fallthrough and go into the default case. */ |
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/* fall through */ |
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/* We get here when the endpoint is wrong. Should not happen though. */ |
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default: |
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/* We stall the command. */ |
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dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint); |
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/* No more work to do here. The command failed but the upper layer does not depend on it. */ |
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return(UX_SUCCESS); |
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} |
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/* Return the function status. */ |
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return(UX_SUCCESS); |
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} |
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