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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_transfer_abort PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will abort transactions attached to a transfer */
/* request. */
/* */
/* INPUT */
/* */
/* hcd_ehci Pointer to EHCI controller */
/* transfer_request Pointer to transfer request */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_utility_virtual_address Get virtual address */
/* _ux_host_mutex_on Get mutex */
/* _ux_host_mutex_off Put mutex */
/* _ux_utility_delay_ms Delay milliseconds */
/* _ux_hcd_ehci_ed_clean Clean TDs on ED */
/* */
/* CALLED BY */
/* */
/* EHCI Controller Driver */
/* */
/**************************************************************************/
UINT _ux_hcd_ehci_transfer_abort(UX_HCD_EHCI *hcd_ehci,UX_TRANSFER *transfer_request)
{
UX_ENDPOINT *endpoint;
UX_EHCI_HSISO_ED *ied;
UX_EHCI_PERIODIC_LINK_POINTER lp;
UX_EHCI_HSISO_TD *fr_td;
UX_TRANSFER **list_head;
UX_TRANSFER *transfer;
ULONG max_load_count;
ULONG frindex;
ULONG fr_start;
ULONG fr_req;
ULONG first_new_aborted = 1;
UX_PARAMETER_NOT_USED(hcd_ehci);
/* Get the pointer to the endpoint associated with the transfer request*/
endpoint = (UX_ENDPOINT *) transfer_request -> ux_transfer_request_endpoint;
/* From the endpoint container, get the address of the physical endpoint. */
lp.void_ptr = endpoint -> ux_endpoint_ed;
/* Check if this physical endpoint has been initialized properly! */
if (lp.void_ptr == UX_NULL)
{
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_ENDPOINT_HANDLE_UNKNOWN, endpoint, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_ENDPOINT_HANDLE_UNKNOWN);
}
/* Check endpoint type. */
if ((endpoint -> ux_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) == UX_ISOCHRONOUS_ENDPOINT)
{
/* Lock the periodic table. */
_ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE)
{
list_head = &lp.sitd_ptr -> ux_ehci_fsiso_td_transfer_head;
}
else
#endif
{
/* Get ED for the iTD(s). */
ied = lp.itd_ptr -> ux_ehci_hsiso_td_ed;
/* Get list head for further process. */
list_head = &ied -> ux_ehci_hsiso_ed_transfer_head;
/* Max load count (in 1 ms): 8, 4, 2, 1 ... */
max_load_count = 8u >> ied -> ux_ehci_hsiso_ed_frinterval_shift;
}
/* The whole list is aborted. */
if ((transfer_request == 0) ||
(transfer_request == &endpoint -> ux_endpoint_transfer_request) ||
(*list_head) == transfer_request)
{
*list_head = UX_NULL;
/* Clear controls any way. */
for (frindex = 0; frindex < 4; frindex ++)
{
/* Get actual iTD used and clear controls. */
fr_td = ied -> ux_ehci_hsiso_ed_fr_td[frindex];
fr_td -> ux_ehci_hsiso_td_control[(frindex << 1)] &= ~UX_EHCI_HSISO_STATUS_ACTIVE;
fr_td -> ux_ehci_hsiso_td_control[(frindex << 1) + 1] &= ~UX_EHCI_HSISO_STATUS_ACTIVE;
fr_td -> ux_ehci_hsiso_td_frload = 0;
fr_td -> ux_ehci_hsiso_td_fr_transfer[0] = UX_NULL;
fr_td -> ux_ehci_hsiso_td_fr_transfer[1] = UX_NULL;
}
/* Transfer needs restart. */
ied -> ux_ehci_hsiso_ed_frstart = 0xFF;
ied -> ux_ehci_hsiso_ed_fr_hc = 0;
ied -> ux_ehci_hsiso_ed_fr_sw = 0;
ied -> ux_ehci_hsiso_ed_transfer_tail = UX_NULL;
ied -> ux_ehci_hsiso_ed_transfer_first_new = UX_NULL;
ied -> ux_ehci_hsiso_ed_frload = 0;
}
else
{
/* At least one request remains (no restart). */
/* Get the next micro-frame index. */
fr_start = (ULONG)ied -> ux_ehci_hsiso_ed_fr_hc << ied -> ux_ehci_hsiso_ed_frinterval_shift;
fr_start += ied -> ux_ehci_hsiso_ed_frstart;
fr_start &= 0x7u;
/* First request micro-frame index offset is 0. */
fr_req = 0;
/* Remove the transfer and transfers after it. */
transfer = (*list_head) -> ux_transfer_request_next_transfer_request;
while(transfer)
{
/* Check next micro-frame index. */
fr_req += ied -> ux_ehci_hsiso_ed_frinterval;
/* If next is transfer we expect, remove from it. */
if (transfer -> ux_transfer_request_next_transfer_request == transfer_request)
{
/* Point to NULL to remove all things after it. */
transfer -> ux_transfer_request_next_transfer_request = UX_NULL;
break;
}
/* If that's first new, it means first new is in remained list. */
if (transfer == ied -> ux_ehci_hsiso_ed_transfer_first_new)
first_new_aborted = 0;
/* Next transfer. */
transfer = transfer -> ux_transfer_request_next_transfer_request;
}
/* If first new is removed, set to null. */
if (first_new_aborted)
ied -> ux_ehci_hsiso_ed_transfer_first_new = UX_NULL;
/* If some micro-frames are removed, modify control. */
for (; fr_req < max_load_count; fr_req += ied -> ux_ehci_hsiso_ed_frinterval)
{
frindex = fr_start + fr_req;
frindex &= 0x7u;
/* Get actual iTD used and clear control. */
fr_td = ied -> ux_ehci_hsiso_ed_fr_td[frindex >> 1];
fr_td -> ux_ehci_hsiso_td_frload &= (UCHAR)~(1u << frindex);
fr_td -> ux_ehci_hsiso_td_control[frindex] &= ~UX_EHCI_HSISO_STATUS_ACTIVE;
fr_td -> ux_ehci_hsiso_td_fr_transfer[frindex & 1u] = UX_NULL;
}
}
/* Release the periodic table. */
_ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
}
else
/* Clean the TDs attached to the ED. */
_ux_hcd_ehci_ed_clean(lp.ed_ptr);
/* Return successful completion. */
return(UX_SUCCESS);
}
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