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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 CCID Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_ccid.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_ccid_response PORTABLE C */
/* 6.2.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function sends bulk IN response of the USB CCID device. */
/* */
/* INPUT */
/* */
/* ccid Pointer to ccid instance */
/* buffer Pointer to data buffer */
/* length Data length */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* USBX Source Code */
/* */
/**************************************************************************/
UINT _ux_device_class_ccid_response(UX_DEVICE_CLASS_CCID *ccid, UCHAR *buffer, ULONG length)
{
UX_SLAVE_ENDPOINT *endpoint;
UX_SLAVE_TRANSFER *transfer;
UINT status;
/* Get bulk IN endpoint. */
endpoint = ccid -> ux_device_class_ccid_endpoint_in;
/* Get transfer request. */
transfer = &endpoint -> ux_slave_endpoint_transfer_request;
/* Lock bulk IN. */
_ux_device_mutex_on(&ccid -> ux_device_class_ccid_response_mutex);
/* Prepare data to transfer. */
if (length > 0 && buffer != UX_NULL &&
transfer -> ux_slave_transfer_request_data_pointer != buffer)
{
_ux_utility_memory_copy(transfer -> ux_slave_transfer_request_data_pointer,
buffer, length); /* Use case of memcpy is verified. */
}
#if defined(UX_DEVICE_STANDALONE)
/* Setup transfer struct for running. */
UX_SLAVE_TRANSFER_STATE_RESET(transfer);
transfer -> ux_slave_transfer_request_requested_length = length;
status = UX_SUCCESS;
ccid -> ux_device_class_ccid_rsp_state = UX_DEVICE_CLASS_CCID_RSP_START;
#else
/* Transfer data. */
status = _ux_device_stack_transfer_request(transfer, length, length);
#endif
/* Unlock bulk IN. */
_ux_device_mutex_off(&ccid -> ux_device_class_ccid_response_mutex);
/* Return transfer status. */
return(status);
}
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