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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"
#if !defined(UX_DEVICE_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_ccid_runner_thread_entry PORTABLE C */
/* 6.2.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the thread of the CCID command handling. It */
/* is waiting for the event to start command processing. */
/* */
/* INPUT */
/* */
/* ccid_runner Address of CCID runner (32b) */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Request transfer */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
VOID _ux_device_class_ccid_runner_thread_entry(ULONG ccid_runner)
{
UX_SLAVE_DEVICE *device;
UX_DEVICE_CLASS_CCID *ccid;
UX_DEVICE_CLASS_CCID_PARAMETER *parameter;
UX_DEVICE_CLASS_CCID_HANDLE *handles;
UX_DEVICE_CLASS_CCID_HANDLE handle;
UX_DEVICE_CLASS_CCID_RUNNER *runner;
UX_DEVICE_CLASS_CCID_SLOT *slot;
UX_DEVICE_CLASS_CCID_MESSAGE_HEADER *cmd;
UX_DEVICE_CLASS_CCID_COMMAND_SETT *cmd_sett;
UX_DEVICE_CLASS_CCID_RDR_TO_PC_SLOT_STATUS_HEADER *rsp;
UX_DEVICE_CLASS_CCID_MESSAGES messages;
ULONG event_mask, flags;
ULONG cmd_checks;
UINT status;
/* Cast properly the ccid runner. */
UX_THREAD_EXTENSION_PTR_GET(runner, UX_DEVICE_CLASS_CCID_RUNNER, ccid_runner)
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Get CCID instance. */
ccid = runner -> ux_device_class_ccid_runner_ccid;
/* Get CCID parameter. */
parameter = &ccid -> ux_device_class_ccid_parameter;
/* Get event mask to wait. */
event_mask = 1u << runner -> ux_device_class_ccid_runner_id;
/* This thread runs forever but can be suspended or resumed by the user application. */
status = UX_SUCCESS;
while(1)
{
/* Check device state. */
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED)
{
_ux_utility_thread_suspend(&runner -> ux_device_class_ccid_runner_thread);
continue;
}
/* Wait signal. */
status = _ux_utility_event_flags_get(&ccid -> ux_device_class_ccid_events,
event_mask, UX_OR_CLEAR, &flags, UX_WAIT_FOREVER);
if (status != UX_SUCCESS)
{
_ux_utility_thread_suspend(&runner -> ux_device_class_ccid_runner_thread);
continue;
}
/* We have a command to process. */
cmd = (UX_DEVICE_CLASS_CCID_MESSAGE_HEADER *)
runner -> ux_device_class_ccid_runner_command;
rsp = (UX_DEVICE_CLASS_CCID_RDR_TO_PC_SLOT_STATUS_HEADER *)
runner -> ux_device_class_ccid_runner_response;
/* Slot to handle. */
slot = ccid -> ux_device_class_ccid_slots;
slot += runner -> ux_device_class_ccid_runner_slot;
/* Command settings. */
cmd_sett = (UX_DEVICE_CLASS_CCID_COMMAND_SETT *)_ux_device_class_ccid_command_sett;
cmd_sett += runner -> ux_device_class_ccid_runner_command_index;
/* Message to pass to application. */
messages.ux_device_class_ccid_messages_pc_to_rdr = (UCHAR *)cmd;
messages.ux_device_class_ccid_messages_rdr_to_pc = (UCHAR *)rsp;
/* Internal checks. */
cmd_checks = (ULONG)cmd_sett -> ux_device_class_ccid_command_sett_flags;
cmd_checks &= (ULONG)slot -> ux_device_class_ccid_slot_flags;
/* Check hardware error! */
if (cmd_checks & UX_DEVICE_CLASS_CCID_FLAG_HW_ERROR)
{
/* Response: (1,1,HW_ERROR). */
rsp -> bStatus = UX_DEVICE_CLASS_CCID_SLOT_STATUS(1, 1);
rsp -> bError = UX_DEVICE_CLASS_CCID_HW_ERROR;
}
/* Check auto sequencing! */
else if (cmd_checks & UX_DEVICE_CLASS_CCID_FLAG_AUTO_SEQUENCING)
{
/* Response: (1,1,BUSY_WITH_AUTO_SEQUENCE). */
rsp -> bStatus = UX_DEVICE_CLASS_CCID_SLOT_STATUS(1, 1);
rsp -> bError = UX_DEVICE_CLASS_CCID_BUSY_WITH_AUTO_SEQUENCE;
}
/* Process command, application can fill status. */
else
{
handles = (UX_DEVICE_CLASS_CCID_HANDLE *)parameter -> ux_device_class_ccid_handles;
handle = handles[(INT)cmd_sett -> ux_device_class_ccid_command_sett_handle_index];
/* Initialize response length based on type. */
switch(rsp -> bMessageType)
{
case UX_DEVICE_CLASS_CCID_RDR_TO_PC_DATA_RATE_AND_CLOCK_FREQ:
/* Length fixed to 10+8. */
messages.ux_device_class_ccid_messages_rdr_to_pc_length = 18;
UX_DEVICE_CLASS_CCID_MESSAGE_LENGTH_SET(rsp, 8);
break;
case UX_DEVICE_CLASS_CCID_RDR_TO_PC_SLOT_STATUS:
/* Length fixed to 10. */
messages.ux_device_class_ccid_messages_rdr_to_pc_length =
UX_DEVICE_CLASS_CCID_MESSAGE_HEADER_LENGTH;
break;
default:
/* There is possible data, set length to max transfer length. */
messages.ux_device_class_ccid_messages_rdr_to_pc_length =
parameter -> ux_device_class_ccid_max_transfer_length;
break;
}
/* Invoke application callback. */
status = handle(cmd -> bSlot, &messages);
/* Save application status updates. */
/* Save bmICCStatus. */
slot -> ux_device_class_ccid_slot_icc_status = rsp->bStatus &
UX_DEVICE_CLASS_CCID_SLOT_STATUS_ICC_MASK;
/* Save bClockStatus. */
slot -> ux_device_class_ccid_slot_clock_status = rsp->bClockStatus;
}
/* If failed (aborted), no response. */
if (status != UX_SUCCESS)
continue;
if (slot -> ux_device_class_ccid_slot_aborting)
continue;
/* Send response. */
_ux_device_class_ccid_response(ccid, (UCHAR *)rsp,
messages.ux_device_class_ccid_messages_rdr_to_pc_length);
_ux_device_class_ccid_lock(ccid);
/* Free runner. */
runner -> ux_device_class_ccid_runner_slot = -1;
ccid -> ux_device_class_ccid_n_busy --;
/* Clear slot busy. */
slot -> ux_device_class_ccid_slot_runner = -1;
_ux_device_class_ccid_unlock(ccid);
}
}
#endif
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