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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Device Stack */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_stack_endpoint_stall PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function stalls an endpoint. The host will need to reissue */
/* a reset to clear the endpoint. */
/* */
/* INPUT */
/* */
/* endpoint Pointer to endpoint */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_slave_dcd_function) DCD dispatch function */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
/* used UX prefix to refer to */
/* TX symbols instead of using */
/* them directly, */
/* resulting in version 6.1 */
/* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
/* added standalone support, */
/* resulting in version 6.1.10 */
/* */
/**************************************************************************/
UINT _ux_device_stack_endpoint_stall(UX_SLAVE_ENDPOINT *endpoint)
{
UX_INTERRUPT_SAVE_AREA
UX_SLAVE_DCD *dcd;
UINT status;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_ENDPOINT_STALL, endpoint, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Assume device is in an invalid state here in order to reduce code in following
section where interrupts are disabled. */
status = UX_ERROR;
/* Ensure we don't change the endpoint's state after disconnection routine
resets it. */
UX_DISABLE
/* Check if the device is in a valid state; as soon as the device is out
of the RESET state, transfers occur and thus endpoints may be stalled. */
if (_ux_system_slave -> ux_system_slave_device.ux_slave_device_state != UX_DEVICE_RESET &&
endpoint -> ux_slave_endpoint_state != UX_ENDPOINT_HALTED)
{
/* Stall the endpoint. */
status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint);
/* Mark the endpoint state. */
if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) !=
UX_CONTROL_ENDPOINT)
endpoint -> ux_slave_endpoint_state = UX_ENDPOINT_HALTED;
}
/* Restore interrupts. */
UX_RESTORE
/* Return completion status. */
return(status);
}