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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_task_run PORTABLE C */
/* 6.2.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the background task of the CCID. */
/* */
/* It's for standalone mode. */
/* */
/* INPUT */
/* */
/* ccid Pointer to CCID class */
/* */
/* OUTPUT */
/* */
/* State machine status */
/* UX_STATE_EXIT Device not configured */
/* UX_STATE_IDLE No streaming transfer running */
/* UX_STATE_WAIT Streaming transfer running */
/* */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* USBX Device Stack */
/* */
/**************************************************************************/
UINT _ux_device_class_ccid_runner_task_run(UX_DEVICE_CLASS_CCID *ccid)
{
UX_SLAVE_DEVICE *device;
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 cmd_checks;
UINT status;
INT immediate_state = UX_TRUE;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Check if the device is configured. */
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED)
return(UX_STATE_EXIT);
/* Get CCID runner (optimized only 1 runner). */
runner = ccid -> ux_device_class_ccid_runners;
/* Slot to handle (optimized for only one slot). */
slot = ccid -> ux_device_class_ccid_slots;
/* Get CCID parameter. */
parameter = &ccid -> ux_device_class_ccid_parameter;
/* Get CCID messages. */
messages = &runner -> ux_device_class_ccid_runner_messages;
/* Get command and response buffers. */
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;
/* Process states. */
while(immediate_state)
{
/* Check states. */
switch(runner -> ux_device_class_ccid_runner_state)
{
case UX_DEVICE_CLASS_CCID_RUNNER_IDLE:
return(UX_STATE_IDLE);
case UX_DEVICE_CLASS_CCID_RUNNER_START:
/* 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;
/* Send response. */
_ux_device_class_ccid_response(ccid, (UCHAR *)rsp,
messages -> ux_device_class_ccid_messages_rdr_to_pc_length);
/* Runner is idle (status is updated after response sent). */
runner -> ux_device_class_ccid_runner_state = UX_DEVICE_CLASS_CCID_RUNNER_IDLE;
continue;
}
/* Check auto sequencing! */
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;
/* Send response. */
_ux_device_class_ccid_response(ccid, (UCHAR *)rsp,
messages -> ux_device_class_ccid_messages_rdr_to_pc_length);
/* Runner is idle (status is updated after response sent). */
runner -> ux_device_class_ccid_runner_state = UX_DEVICE_CLASS_CCID_RUNNER_IDLE;
continue;
}
/* Get command to process, application can fill status. */
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;
}
/* Save handle that is running. */
runner -> ux_device_class_ccid_runner_handle = handle;
/* Fall through. */
case UX_DEVICE_CLASS_CCID_RUNNER_HANDLE:
/* Run handle (state machine). */
status = runner -> ux_device_class_ccid_runner_handle(cmd -> bSlot, messages);
/* Error cases. */
if (status < UX_STATE_NEXT ||
slot -> ux_device_class_ccid_slot_aborting)
{
/* There is no response in this case. */
runner -> ux_device_class_ccid_runner_state = UX_DEVICE_CLASS_CCID_RUNNER_IDLE;
return(UX_STATE_IDLE);
}
/* Done case. */
if (status == UX_STATE_NEXT)
{
/* Next: response start. */
runner -> ux_device_class_ccid_runner_state = UX_DEVICE_CLASS_CCID_RUNNER_RSP_START;
continue;
}
/* Waiting. */
return(UX_STATE_WAIT);
case UX_DEVICE_CLASS_CCID_RUNNER_RSP_START:
/* Wait response idle. */
if (ccid -> ux_device_class_ccid_rsp_state != UX_DEVICE_CLASS_CCID_RSP_IDLE)
return(UX_STATE_WAIT);
/* Send response. */
_ux_device_class_ccid_response(ccid, (UCHAR *)rsp,
messages -> ux_device_class_ccid_messages_rdr_to_pc_length);
/* Runner is idle (status is updated after response sent). */
runner -> ux_device_class_ccid_runner_state = UX_DEVICE_CLASS_CCID_RUNNER_IDLE;
continue;
default:
break;
}
/* Break the loop. */
immediate_state = UX_FALSE;
}
/* Unhandled state. */
return(UX_STATE_EXIT);
}
#endif
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