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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_isochronous_endpoint_destroy PORTABLE C */
/* 6.1.11 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will destroy an isochronous endpoint. */
/* */
/* INPUT */
/* */
/* hcd_ehci Pointer to EHCI controller */
/* endpoint Pointer to endpoint */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* None */
/* _ux_host_mutex_on Get mutex */
/* _ux_host_mutex_off Put mutex */
/* _ux_hcd_ehci_periodic_descriptor_link Link/unlink descriptor */
/* _ux_utility_memory_free Free memory */
/* */
/* CALLED BY */
/* */
/* EHCI Controller Driver */
/* */
/**************************************************************************/
UINT _ux_hcd_ehci_isochronous_endpoint_destroy(UX_HCD_EHCI *hcd_ehci, UX_ENDPOINT *endpoint)
{
#if UX_MAX_ISO_TD == 0
UX_PARAMETER_NOT_USED(hcd_ehci);
UX_PARAMETER_NOT_USED(endpoint);
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_HCD, UX_FUNCTION_NOT_SUPPORTED);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_FUNCTION_NOT_SUPPORTED, 0, 0, 0, UX_TRACE_ERRORS, 0, 0)
/* Not supported, return error. */
return(UX_FUNCTION_NOT_SUPPORTED);
#else
UX_EHCI_HSISO_ED *ed;
UX_EHCI_PERIODIC_LINK_POINTER ed_td;
UX_EHCI_PERIODIC_LINK_POINTER lp;
ULONG max_packet_size;
UINT frindex;
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
ULONG split_count;
ULONG last_frindex;
ULONG last_size;
#endif
/* Get ED iTD/siTD. */
ed_td.void_ptr = endpoint -> ux_endpoint_ed;
/* Access to periodic list. */
_ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
/* Check active iTD/siTD and unlink it. */
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE)
{
/* TBD. */
}
else
#endif
{
/* Get ED. */
ed = ed_td.itd_ptr -> ux_ehci_hsiso_td_ed;
/* Unlink from periodic list. */
if (ed_td.itd_ptr -> ux_ehci_hsiso_td_previous_lp.void_ptr != UX_NULL)
{
/* Get next LP of last iTD. */
lp = ed -> ux_ehci_hsiso_ed_fr_td[ed -> ux_ehci_hsiso_ed_nb_tds - 1]
-> ux_ehci_hsiso_td_next_lp;
_ux_hcd_ehci_periodic_descriptor_link(
ed_td.itd_ptr -> ux_ehci_hsiso_td_previous_lp.void_ptr,
UX_NULL, UX_NULL,
lp.void_ptr);
}
}
/* Unlink iTD/siTD from the scan list. */
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE)
{
/* Get list head. */
lp.sitd_ptr = hcd_ehci -> ux_hcd_ehci_fsiso_scan_list;
/* Check if unlink from head. */
if (lp.sitd_ptr == ed_td.sitd_ptr)
/* Unlink from list head. */
hcd_ehci -> ux_hcd_ehci_fsiso_scan_list = ed_td.sitd_ptr -> ux_ehci_fsiso_td_next_scan_td;
else
{
/* Scan items in list. */
while(lp.sitd_ptr)
{
/* Not the previous item, just try next. */
if (lp.sitd_ptr -> ux_ehci_fsiso_td_next_scan_td != ed_td.sitd_ptr)
{
lp.sitd_ptr = lp.sitd_ptr -> ux_ehci_fsiso_td_next_scan_td;
continue;
}
/* Found it, unlink and break. */
lp.sitd_ptr -> ux_ehci_fsiso_td_next_scan_td = ed_td.sitd_ptr -> ux_ehci_fsiso_td_next_scan_td;
break;
}
}
}
else
#endif
{
/* Get head. */
lp.itd_ptr = hcd_ehci -> ux_hcd_ehci_hsiso_scan_list;
/* Check if iTD is in head. */
if (lp.itd_ptr == ed_td.itd_ptr)
/* Unlink from list head. */
hcd_ehci -> ux_hcd_ehci_hsiso_scan_list = lp.itd_ptr -> ux_ehci_hsiso_td_next_scan_td;
else
{
/* Not in head, there must be previous. */
/* Link it's previous to next. */
lp.itd_ptr -> ux_ehci_hsiso_td_previous_scan_td -> ux_ehci_hsiso_td_next_scan_td =
lp.itd_ptr -> ux_ehci_hsiso_td_next_scan_td;
/* Link it's next to previous. */
if (lp.itd_ptr -> ux_ehci_hsiso_td_next_scan_td)
lp.itd_ptr -> ux_ehci_hsiso_td_next_scan_td -> ux_ehci_hsiso_td_previous_scan_td =
lp.itd_ptr -> ux_ehci_hsiso_td_previous_scan_td;
}
}
/* Update micro-frame loads of anchor. */
/* Calculate max packet size. */
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE)
{
max_packet_size = endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_PACKET_SIZE_MASK;
/* Update according to siTD S-Mask. */
max_packet_size = endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_NUMBER_OF_TRANSACTIONS_MASK;
/* Update according to mask. */
for (frindex = 0; frindex < 8; frindex ++)
{
/* Update start split related. */
if (ed_td.sitd_ptr -> ux_ehci_fsiso_td_cap1 & (UX_EHCI_SMASK_0 << frindex))
{
/* Update start split count. */
ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_ssplit_count[frindex] --;
/* Update load for OUT. */
if ((endpoint -> ux_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) == 0)
{
split_count = (max_packet_size + 187) / 188;
last_frindex = ((ed_td.sitd_ptr -> ux_ehci_fsiso_td_frindex + split_count - 1) & 7);
last_size = max_packet_size % 188;
if (last_size == 0 &&
frindex == last_frindex)
ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)
(ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - last_size);
else
ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)
(ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - 188u);
}
}
/* Update complete split related (IN only). */
if (ed_td.sitd_ptr -> ux_ehci_fsiso_td_cap1 & (UX_EHCI_CMASK_0 << frindex))
ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)
(ed_td.sitd_ptr -> ux_ehci_fsiso_td_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - 188u);
}
}
else
#endif
{
/* Get max transfer size. */
max_packet_size = ed_td.itd_ptr -> ux_ehci_hsiso_td_max_trans_size;
/* Update according to mask. */
for (frindex = ed -> ux_ehci_hsiso_ed_frindex;
frindex < 8;
frindex += ed -> ux_ehci_hsiso_ed_frinterval)
{
/* Decrement the microframes scheduled. */
ed -> ux_ehci_hsiso_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)(ed -> ux_ehci_hsiso_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - max_packet_size);
}
}
/* Release periodic list. */
_ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
/* Now we can safely make the iTD/siTDs free. */
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE)
{
ed_td.sitd_ptr -> ux_ehci_fsiso_td_status = UX_UNUSED;
}
else
#endif
{
for (frindex = 0; frindex < ed -> ux_ehci_hsiso_ed_nb_tds; frindex ++)
ed -> ux_ehci_hsiso_ed_fr_td[frindex] -> ux_ehci_hsiso_td_status = UX_UNUSED;
_ux_utility_memory_free(ed);
}
return(UX_SUCCESS);
#endif
}
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