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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_control_request PORTABLE C */
/* 6.1.11 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function manages the requests sent by the host on the control */
/* endpoints with a CLASS or VENDOR SPECIFIC type. */
/* */
/* INPUT */
/* */
/* ccid Pointer to ccid class */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Transfer request */
/* _ux_device_class_ccid_request_abort Abort slot */
/* _ux_utility_memory_copy Copy memory */
/* */
/* CALLED BY */
/* */
/* CCID Class */
/* */
/**************************************************************************/
UINT _ux_device_class_ccid_control_request(UX_SLAVE_CLASS_COMMAND *command)
{
UX_DEVICE_CLASS_CCID *ccid;
UX_DEVICE_CLASS_CCID_PARAMETER *parameter;
UX_SLAVE_CLASS *ccid_class;
UX_SLAVE_TRANSFER *transfer_request;
UX_SLAVE_DEVICE *device;
ULONG request;
UCHAR seq, slot;
ULONG request_length;
ULONG transmit_length;
UCHAR *transmit_buffer;
/* Get the class container. */
ccid_class = command -> ux_slave_class_command_class_ptr;
/* Get the class instance in the container. */
ccid = (UX_DEVICE_CLASS_CCID *) ccid_class -> ux_slave_class_instance;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Get the pointer to the transfer request associated with the control endpoint. */
transfer_request = &device -> ux_slave_device_control_endpoint.ux_slave_endpoint_transfer_request;
/* Extract all necessary fields of the request. */
request = *(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_REQUEST);
/* Pickup the request length. */
request_length = _ux_utility_short_get(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_LENGTH);
/* Here we proceed only the standard request we know of at the device level. */
switch (request)
{
case UX_DEVICE_CLASS_CCID_ABORT:
slot = transfer_request -> ux_slave_transfer_request_setup[UX_SETUP_VALUE];
seq = transfer_request -> ux_slave_transfer_request_setup[UX_SETUP_VALUE + 1];
return _ux_device_class_ccid_control_abort(ccid, slot, seq);
case UX_DEVICE_CLASS_CCID_GET_CLOCK_FREQUENCIES:
parameter = &ccid -> ux_device_class_ccid_parameter;
/* Check bNumClockSuppored. */
if (parameter -> ux_device_class_ccid_clocks == UX_NULL ||
parameter -> ux_device_class_ccid_n_clocks == 0)
return(UX_ERROR);
/* Calculate transmit length. */
transmit_length = parameter -> ux_device_class_ccid_n_clocks;
if (UX_OVERFLOW_CHECK_MULC_ULONG(transmit_length, 4))
return(UX_ERROR);
transmit_length <<= 2;
/* Update transmit buffer. */
transmit_buffer = (UCHAR *)parameter -> ux_device_class_ccid_clocks;
break;
case UX_DEVICE_CLASS_CCID_GET_DATA_RATES:
parameter = &ccid -> ux_device_class_ccid_parameter;
/* Check bNumDataRateSuppored. */
if (parameter -> ux_device_class_ccid_data_rates == UX_NULL ||
parameter -> ux_device_class_ccid_n_data_rates == 0)
return(UX_ERROR);
/* Calculate transmit length. */
transmit_length = parameter -> ux_device_class_ccid_n_data_rates;
if (UX_OVERFLOW_CHECK_MULC_ULONG(transmit_length, 4))
return(UX_ERROR);
transmit_length <<= 2;
/* Update transmit buffer. */
transmit_buffer = (UCHAR *)parameter -> ux_device_class_ccid_data_rates;
break ;
default:
/* Unknown function. It's not handled. */
return(UX_ERROR);
}
/* Limit transmit length. */
transmit_length = UX_MIN(transmit_length, UX_SLAVE_REQUEST_CONTROL_MAX_LENGTH);
transmit_length = UX_MIN(transmit_length, request_length);
/* Copy data to transmit. */
_ux_utility_memory_copy(transfer_request -> ux_slave_transfer_request_data_pointer,
transmit_buffer, transmit_length); /* Use case of memcpy is verified. */
/* Transmit. */
_ux_device_stack_transfer_request(transfer_request, transmit_length, request_length);
/* It's handled. */
return(UX_SUCCESS);
}
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