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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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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_endpoint_stall PORTABLE C */ |
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/* 6.1.10 */ |
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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 stalls an endpoint. The host will need to reissue */ |
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/* a reset to clear the endpoint. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* endpoint Pointer to endpoint */ |
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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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/* Application */ |
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/* */ |
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/**************************************************************************/ |
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3812 |
UINT _ux_device_stack_endpoint_stall(UX_SLAVE_ENDPOINT *endpoint) |
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{ |
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UX_INTERRUPT_SAVE_AREA |
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UX_SLAVE_DCD *dcd; |
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UINT status; |
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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_ENDPOINT_STALL, endpoint, 0, 0, 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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/* Assume device is in an invalid state here in order to reduce code in following |
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section where interrupts are disabled. */ |
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status = UX_ERROR; |
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/* Ensure we don't change the endpoint's state after disconnection routine |
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resets it. */ |
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UX_DISABLE |
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/* Check if the device is in a valid state; as soon as the device is out |
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of the RESET state, transfers occur and thus endpoints may be stalled. */ |
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✓✓ |
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if (_ux_system_slave -> ux_system_slave_device.ux_slave_device_state != UX_DEVICE_RESET && |
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✓✓ |
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endpoint -> ux_slave_endpoint_state != UX_ENDPOINT_HALTED) |
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{ |
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/* Stall the endpoint. */ |
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status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint); |
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/* Mark the endpoint state. */ |
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✓✓ |
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if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) != |
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UX_CONTROL_ENDPOINT) |
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endpoint -> ux_slave_endpoint_state = UX_ENDPOINT_HALTED; |
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} |
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/* Restore interrupts. */ |
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UX_RESTORE |
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/* Return completion status. */ |
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return(status); |
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} |
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