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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 */
/** */
/** EHCI Controller Driver */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_hcd_ehci.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_hcd_ehci_port_suspend PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will suspend a specific port attached to the root */
/* HUB. */
/* */
/* INPUT */
/* */
/* hcd_ehci Pointer to EHCI controller */
/* port_index Port index to suspend */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* EHCI Controller Driver */
/* */
/**************************************************************************/
UINT _ux_hcd_ehci_port_suspend(UX_HCD_EHCI *hcd_ehci, ULONG port_index)
{
ULONG ehci_register_port_status;
/* Check to see if this port is valid on this controller. */
if (hcd_ehci -> ux_hcd_ehci_nb_root_hubs < port_index)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_HCD, UX_PORT_INDEX_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_PORT_INDEX_UNKNOWN, port_index, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_PORT_INDEX_UNKNOWN);
}
/* Ensure that the downstream port has a device attached. If not, ignore the request. */
ehci_register_port_status = _ux_hcd_ehci_register_read(hcd_ehci, EHCI_HCOR_PORT_SC + port_index);
/* Check Device Connection Status. */
if ((ehci_register_port_status & EHCI_HC_PS_CCS) == 0)
/* Nothing on the downstream port. */
return(UX_NO_DEVICE_CONNECTED);
/* Set Suspend. */
ehci_register_port_status |= EHCI_HC_PS_SUSPEND;
/* Update the port status. */
_ux_hcd_ehci_register_write(hcd_ehci, EHCI_HCOR_PORT_SC + port_index, ehci_register_port_status);
/* Not supported, return error. */
return(UX_FUNCTION_NOT_SUPPORTED);
}
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