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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 */
/** */
/** Device Data Pump Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_dpump.h"
#include "ux_device_stack.h"
/* Remove compiling warning. */
VOID _ux_device_class_dpump_thread(ULONG dpump_class);
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_dpump_thread PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the thread of the dpump class. */
/* */
/* It's for RTOS mode. */
/* */
/* INPUT */
/* */
/* class Address of dpump class */
/* container */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Request transfer */
/* _ux_utility_memory_copy Copy memory */
/* _ux_utility_thread_suspend Suspend thread */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
VOID _ux_device_class_dpump_thread(ULONG dpump_class)
{
UX_SLAVE_CLASS *class_ptr;
UX_SLAVE_INTERFACE *interface_ptr;
UX_SLAVE_CLASS_DPUMP *dpump;
UX_SLAVE_TRANSFER *transfer_request;
UX_SLAVE_DEVICE *device;
UX_SLAVE_ENDPOINT *endpoint_in;
UX_SLAVE_ENDPOINT *endpoint_out;
UINT status;
ULONG length;
/* This thread runs forever but can be suspended or resumed. */
while(1)
{
/* Cast properly the dpump instance. */
UX_THREAD_EXTENSION_PTR_GET(class_ptr, UX_SLAVE_CLASS, dpump_class)
/* Get the dpump instance from this class container. */
dpump = (UX_SLAVE_CLASS_DPUMP *) class_ptr -> ux_slave_class_instance;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* This is the first time we are activated. We need the interface to the class. */
interface_ptr = dpump -> ux_slave_class_dpump_interface;
/* Locate the endpoints. */
endpoint_in = interface_ptr -> ux_slave_interface_first_endpoint;
/* Check the endpoint direction, if IN we have the correct endpoint. */
if ((endpoint_in -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) != UX_ENDPOINT_IN)
{
/* Wrong direction, we found the OUT endpoint first. */
endpoint_out = endpoint_in;
/* So the next endpoint has to be the IN endpoint. */
endpoint_in = endpoint_out -> ux_slave_endpoint_next_endpoint;
}
else
{
/* We found the endpoint IN first, so next endpoint is OUT. */
endpoint_out = endpoint_in -> ux_slave_endpoint_next_endpoint;
}
/* As long as the device is in the CONFIGURED state. */
while (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED)
{
/* We prepare to receive from the host on the OUT endpoint. */
transfer_request = &endpoint_out -> ux_slave_endpoint_transfer_request;
/* Send the request to the device controller. */
status = _ux_device_stack_transfer_request(transfer_request, UX_DEVICE_CLASS_DPUMP_PACKET_SIZE, UX_DEVICE_CLASS_DPUMP_PACKET_SIZE);
/* Check the status */
if (status == UX_SUCCESS)
{
/* Obtain the length of the transaction. */
length = transfer_request -> ux_slave_transfer_request_actual_length;
/* Copy the buffer to the target in endpoint. */
_ux_utility_memory_copy(endpoint_in -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_data_pointer,
endpoint_out -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_data_pointer,
length); /* Use case of memcpy is verified. */
/* Now we send the packet back to the host. On the endpoint In. */
transfer_request = &endpoint_in -> ux_slave_endpoint_transfer_request;
/* Sends the data payload back to the caller. */
status = _ux_device_stack_transfer_request(transfer_request, length, length);
/* Check error code. */
if (status != UX_SUCCESS)
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, status);
}
}
/* We need to suspend ourselves. We will be resumed by the
device enumeration module. */
_ux_device_thread_suspend(&class_ptr -> ux_slave_class_thread);
}
}
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