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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_interrupt_endpoint_destroy PORTABLE C */
/* 6.1.11 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will destroy an interrupt endpoint. */
/* */
/* INPUT */
/* */
/* hcd_ehci Pointer to EHCI controller */
/* endpoint Pointer to endpoint */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_hcd_ehci_door_bell_wait Setup doorbell wait */
/* _ux_utility_physical_address Get physical address */
/* _ux_host_mutex_on Get mutex */
/* _ux_host_mutex_off Put mutex */
/* _ux_hcd_ehci_periodic_descriptor_link Link/unlink descriptor */
/* */
/* CALLED BY */
/* */
/* EHCI Controller Driver */
/* */
/**************************************************************************/
UINT _ux_hcd_ehci_interrupt_endpoint_destroy(UX_HCD_EHCI *hcd_ehci, UX_ENDPOINT *endpoint)
{
UX_EHCI_ED *ed;
UX_EHCI_ED *prev_ed;
ULONG frindex;
ULONG max_packet_size;
/* From the endpoint container fetch the EHCI ED descriptor. */
ed = (UX_EHCI_ED *) endpoint -> ux_endpoint_ed;
/* Access to periodic list. */
_ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
/* Unlink the periodic item. */
_ux_hcd_ehci_periodic_descriptor_link(ed -> ux_ehci_ed_previous_ed,
UX_NULL, UX_NULL, ed -> ux_ehci_ed_queue_head);
/* Update the interrupt ED scan list. */
prev_ed = hcd_ehci -> ux_hcd_ehci_interrupt_ed_list;
/* Check if ED in head of scan list. */
if (prev_ed == ed)
/* Point head to the next ED. */
hcd_ehci -> ux_hcd_ehci_interrupt_ed_list = ed -> ux_ehci_ed_next_ed;
else
{
/* Try to find previous ED in scan list. */
/* It's at head now. */
while(prev_ed -> ux_ehci_ed_next_ed)
{
/* The expected ED is found. */
if (prev_ed -> ux_ehci_ed_next_ed == ed)
{
/* Point next to next of the ED. */
prev_ed -> ux_ehci_ed_next_ed = ed -> ux_ehci_ed_next_ed;
break;
}
/* Try next ED. */
prev_ed = prev_ed -> ux_ehci_ed_next_ed;
}
}
/* 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;
else
#endif
{
max_packet_size = endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_NUMBER_OF_TRANSACTIONS_MASK;
max_packet_size >>= UX_MAX_NUMBER_OF_TRANSACTIONS_SHIFT;
if (max_packet_size < 3)
max_packet_size ++;
max_packet_size *= endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_PACKET_SIZE_MASK;
}
/* Update according to ED S-Mask. */
for(frindex = 0; frindex < 8; frindex ++)
{
/* Check schedule mask. */
if ((ed -> ux_ehci_ed_cap1 & (UX_EHCI_SMASK_0 << frindex)))
{
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
/* Start split check. */
if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE)
{
/* Decrement the start split count. */
ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_ssplit_count[frindex] --;
/* Check next endpoint if it's IN (load in C-Mask). */
if (endpoint -> ux_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION)
continue;
}
#endif
/* Decrement the microframe load. */
ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)(ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - max_packet_size);
/* S-Mask found, no C-Mask at the same time, skip C-Mask check. */
continue;
}
#if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE)
/* Complete split interrupt IN check in C-Mask. */
if ((endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE) &&
(endpoint -> ux_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) &&
(ed -> ux_ehci_ed_cap1 & (UX_EHCI_CMASK_0 << frindex)))
{
/* Decrement the microframe load. */
ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)(ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - max_packet_size);
}
#endif
}
/* Release periodic list. */
_ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex);
/* Arm the doorbell and wait for its completion. */
_ux_hcd_ehci_door_bell_wait(hcd_ehci);
/* Now we can safely make the ED free. */
ed -> ux_ehci_ed_status = UX_UNUSED;
/* Return successful completion. */
return(UX_SUCCESS);
}
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