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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 */
/** */
/** Host Stack */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_stack_hcd_unregister PORTABLE C */
/* 6.1.2 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function unregisters a USB host controller driver (HCD) with */
/* the USBX stack, removes all devices rooted from that controller and */
/* disable/stop the controller. */
/* */
/* INPUT */
/* */
/* hcd_name Name of HCD to unregister */
/* hcd_param1 Parameter 1 of HCD */
/* hcd_param2 Parameter 2 of HCD */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* UX_SUCCESS HCD unregistered, related */
/* devices removed and hardware */
/* disabled/stopped success */
/* UX_ERROR HCD not found */
/* */
/* CALLS */
/* */
/* _ux_utility_string_length_check Check and return C string */
/* length if no error */
/* _ux_utility_memory_compare Memory compare */
/* (ux_hcd_entry_function) HCD dispatch entry function */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _ux_host_stack_hcd_unregister(UCHAR *hcd_name,
ULONG hcd_param1, ULONG hcd_param2)
{
UINT status;
UX_DEVICE *device;
UX_HCD *hcd;
#if UX_MAX_CLASS_DRIVER > 1 || UX_MAX_DEVICES > 1
ULONG scan_index;
#endif
#if !defined(UX_NAME_REFERENCED_BY_POINTER)
UINT hcd_name_length = 0;
#endif
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_HCD_UNREGISTER, hcd_name, hcd_param1, hcd_param2, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
#if !defined(UX_NAME_REFERENCED_BY_POINTER)
/* Get the length of the class name (exclude null-terminator). */
status = _ux_utility_string_length_check(hcd_name,
&hcd_name_length, UX_MAX_HCD_NAME_LENGTH);
if (status)
return(status);
#endif
/* Get first HCD. */
hcd = _ux_system_host -> ux_system_host_hcd_array;
/* Default to not found status. */
status = UX_FALSE;
#if UX_MAX_CLASS_DRIVER > 1
/* We need to parse the controller driver table to find an empty spot. */
for (scan_index = 0;
scan_index < UX_SYSTEM_HOST_MAX_HCD_GET();
scan_index++)
{
#endif
/* Is this slot available and saved hcd_parameters match? */
if (hcd -> ux_hcd_status != UX_UNUSED &&
hcd -> ux_hcd_io == hcd_param1 &&
hcd -> ux_hcd_irq == hcd_param2)
{
/* Yes, compare the name (with null terminator). */
status = ux_utility_name_match(hcd -> ux_hcd_name,
hcd_name, hcd_name_length + 1);
#if UX_MAX_CLASS_DRIVER > 1
/* Break if name match (found HCD). */
if (status == UX_TRUE)
break;
#endif
}
#if UX_MAX_CLASS_DRIVER > 1
/* Try the next HCD structure */
hcd ++;
}
#endif
/* No valid HCD found. */
if (status != UX_TRUE)
return(UX_ERROR);
/* Now disable controller. */
hcd -> ux_hcd_entry_function(hcd, UX_HCD_UNINITIALIZE, UX_NULL);
/* Get first device. */
device = _ux_system_host -> ux_system_host_device_array;
#if UX_MAX_DEVICES > 1
/* Remove all devices connected to the controller. */
for (scan_index = 0;
scan_index < _ux_system_host -> ux_system_host_max_devices;
scan_index ++)
{
#else
/* No device. */
if (device -> ux_device_handle == UX_UNUSED)
return(UX_SUCCESS);
#endif
/* Is this device on the HCD root hub? */
if (UX_DEVICE_HCD_MATCH(device, hcd) &&
UX_DEVICE_PARENT_IS_ROOTHUB(device))
{
/* Remove the device (and downstream things connected to it). */
_ux_host_stack_device_remove(hcd, UX_DEVICE_PARENT_GET(device),
UX_DEVICE_PORT_LOCATION_GET(device));
/* The device has been removed, so the port is free again. */
hcd -> ux_hcd_rh_device_connection &= (ULONG)
~(1 << device -> ux_device_port_location);
}
#if UX_MAX_DEVICES > 1
/* Try the next device. */
device ++;
}
#endif
/* And we have one new controller unregistered. */
_ux_system_host -> ux_system_host_registered_hcd --;
return(UX_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _uxe_host_stack_hcd_unregister PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks errors in host stack HCD unregister function */
/* call. */
/* */
/* INPUT */
/* */
/* hcd_name Name of HCD to unregister */
/* hcd_param1 Parameter 1 of HCD */
/* hcd_param2 Parameter 2 of HCD */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_host_stack_hcd_unregister HCD unregister */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _uxe_host_stack_hcd_unregister(UCHAR *hcd_name,
ULONG hcd_param1, ULONG hcd_param2)
{
/* Sanity check. */
if (hcd_name == UX_NULL)
return(UX_INVALID_PARAMETER);
/* Invoke HCD unregister function. */
return(_ux_host_stack_hcd_unregister(hcd_name, hcd_param1, hcd_param2));
}
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