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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 */
/** */
/** Asix Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_asix.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_asix_reception_callback PORTABLE C */
/* 6.2.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the callback from the USBX transfer functions, */
/* it is called when a full or partial transfer has been done for a */
/* bulk in transfer. It calls back the application. */
/* */
/* It's deprecated. */
/* */
/* INPUT */
/* */
/* transfer_request Pointer to transfer request */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_host_stack_transfer_request Process transfer request */
/* _ux_utility_short_get_big_endian Get 16-bit big endian */
/* _ux_network_driver_packet_received Process received packet */
/* nx_packet_transmit_release Release NetX packet */
/* nx_packet_allocate Allocate NetX packet */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
VOID _ux_host_class_asix_reception_callback (UX_TRANSFER *transfer_request)
{
#if defined(UX_HOST_STANDALONE)
UX_PARAMETER_NOT_USED(transfer_request);
#else
UX_HOST_CLASS_ASIX *asix;
NX_PACKET *packet;
ULONG ip_given_length;
UINT status;
/* Get the class instance for this transfer request. */
asix = (UX_HOST_CLASS_ASIX *) transfer_request -> ux_transfer_request_class_instance;
/* Load the packet that is associated with this reception. */
packet = transfer_request -> ux_transfer_request_user_specific;
/* Check the state of the transfer. If there is an error, we do not proceed with this report. */
if (transfer_request -> ux_transfer_request_completion_code == UX_SUCCESS)
{
/* Adjust the prepend, length, append fields to take the Ether header out */
packet -> nx_packet_prepend_ptr += 4;
packet -> nx_packet_length = transfer_request -> ux_transfer_request_actual_length - 4;
packet -> nx_packet_append_ptr =
packet->nx_packet_prepend_ptr + transfer_request -> ux_transfer_request_actual_length ;
/* Calculate the accurate packet length from ip header */
if((*(packet -> nx_packet_prepend_ptr + 12) == 0x08) &&
(*(packet -> nx_packet_prepend_ptr + 13) == 0))
{
ip_given_length = _ux_utility_short_get_big_endian(packet -> nx_packet_prepend_ptr + 16) + UX_HOST_CLASS_ASIX_ETHERNET_SIZE;
packet->nx_packet_length = ip_given_length ;
packet->nx_packet_append_ptr = packet->nx_packet_prepend_ptr + ip_given_length;
}
/* Send that packet to the NetX USB broker. */
_ux_network_driver_packet_received(asix -> ux_host_class_asix_network_handle, packet);
}
else
/* Free the packet that was not successfully received. */
nx_packet_transmit_release(packet);
/* We can accept new reception. Get a NX Packet */
if (nx_packet_allocate(asix -> ux_host_class_asix_packet_pool, &packet,
NX_RECEIVE_PACKET, NX_NO_WAIT) == NX_SUCCESS)
{
/* Adjust the prepend pointer to take into account the non 3 bit alignment of the ethernet header. */
packet -> nx_packet_prepend_ptr += sizeof(USHORT);
/* Set the data pointer. */
transfer_request -> ux_transfer_request_data_pointer = packet -> nx_packet_prepend_ptr;
/* And length. */
transfer_request -> ux_transfer_request_requested_length = UX_HOST_CLASS_ASIX_NX_PAYLOAD_SIZE;
transfer_request -> ux_transfer_request_actual_length = 0;
/* Store the packet that owns this transaction. */
transfer_request -> ux_transfer_request_user_specific = packet;
/* Memorize this packet at the beginning of the queue. */
asix -> ux_host_class_asix_receive_queue = packet;
/* Reset the queue pointer of this packet. */
packet -> nx_packet_queue_next = UX_NULL;
/* Ask USB to schedule a reception. */
status = _ux_host_stack_transfer_request(transfer_request);
/* Check if the transaction was armed successfully. We do not wait for the packet to be sent here. */
if (status != UX_SUCCESS)
{
/* Cancel the packet. */
asix -> ux_host_class_asix_receive_queue = UX_NULL;
}
}
/* There is no status to be reported back to the stack. */
return;
#endif
}
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