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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_controller_disable PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will disable the EHCI controller. The controller will */
/* release all its resources (memory, IO ...). After this, the */
/* controller will not send SOF any longer. */
/* */
/* All transactions should have been completed, all classes should */
/* have been closed. */
/* */
/* INPUT */
/* */
/* hcd_ehci Pointer to EHCI controller */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_hcd_ehci_register_read Read EHCI register */
/* _ux_hcd_ehci_register_write Write EHCI register */
/* */
/* CALLED BY */
/* */
/* EHCI Controller Driver */
/* */
/**************************************************************************/
UINT _ux_hcd_ehci_controller_disable(UX_HCD_EHCI *hcd_ehci)
{
UX_HCD *hcd;
ULONG ehci_register;
/* Point to the generic portion of the host controller structure instance. */
hcd = hcd_ehci -> ux_hcd_ehci_hcd_owner;
/* Stop the controller. */
ehci_register = _ux_hcd_ehci_register_read(hcd_ehci, EHCI_HCOR_USB_COMMAND);
ehci_register = EHCI_HC_IO_HCRESET;
ehci_register &= ~EHCI_HC_IO_RS;
_ux_hcd_ehci_register_write(hcd_ehci, EHCI_HCOR_USB_COMMAND, ehci_register);
/* Wait for the Stop signal to be acknowledged by the controller. */
ehci_register = 0;
while ((ehci_register&EHCI_HC_STS_HC_HALTED) == 0)
{
ehci_register = _ux_hcd_ehci_register_read(hcd_ehci, EHCI_HCCR_HCS_PARAMS);
}
/* Reflect the state of the controller in the main structure. */
hcd -> ux_hcd_status = UX_HCD_STATUS_HALTED;
/* Return successful completion. */
return(UX_SUCCESS);
}
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