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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 PIMA Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_pima.h"
#include "ux_device_stack.h"
#if !defined(UX_DEVICE_STANDALONE)
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_pima_interrupt_thread PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the thread of the pima interrupt endpoint */
/* */
/* INPUT */
/* */
/* pima_class Address of pima class */
/* container */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Request transfer */
/* _ux_utility_memory_allocate Allocate memory */
/* _ux_device_semaphore_get Get semaphore */
/* _ux_device_class_pima_event_get Get PIMA event */
/* _ux_utility_long_put Put 32-bit value */
/* _ux_utility_short_put Put 16-bit value */
/* _ux_device_thread_suspend Suspend thread */
/* */
/* CALLED BY */
/* */
/* ThreadX */
/* */
/**************************************************************************/
VOID _ux_device_class_pima_interrupt_thread(ULONG pima_class)
{
UX_SLAVE_CLASS_PIMA *pima;
UX_SLAVE_DEVICE *device;
UX_SLAVE_TRANSFER *transfer_request_in;
UX_SLAVE_CLASS_PIMA_EVENT pima_event;
UINT status;
UCHAR *buffer;
/* Get the pima instance from the calling parameter. */
UX_THREAD_EXTENSION_PTR_GET(pima, UX_SLAVE_CLASS_PIMA, pima_class)
/* Allocate the event round robin buffer. */
pima -> ux_device_class_pima_event_array =
_ux_utility_memory_allocate_mulc_safe(UX_NO_ALIGN, UX_REGULAR_MEMORY, sizeof(UX_SLAVE_CLASS_PIMA_EVENT), UX_DEVICE_CLASS_PIMA_MAX_EVENTS_QUEUE);
/* Check for successful allocation. */
if (pima -> ux_device_class_pima_event_array == UX_NULL)
{
/* Return, no event management. */
return;
}
/* Allocate the head\tail and end of the round robin buffer. */
pima -> ux_device_class_pima_event_array_head = pima -> ux_device_class_pima_event_array;
pima -> ux_device_class_pima_event_array_tail = pima -> ux_device_class_pima_event_array;
pima -> ux_device_class_pima_event_array_end = pima -> ux_device_class_pima_event_array + UX_DEVICE_CLASS_PIMA_MAX_EVENTS_QUEUE;
/* This thread runs forever but can be suspended or resumed. */
while(1)
{
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* As long as the device is in the CONFIGURED state. */
while (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED)
{
/* All PIMA events are on the interrupt endpoint IN, from the host. */
if (pima -> ux_device_class_pima_interrupt_endpoint == UX_NULL)
break;
transfer_request_in = &pima -> ux_device_class_pima_interrupt_endpoint -> ux_slave_endpoint_transfer_request;
/* Wait until something has awaken us. */
status = _ux_device_semaphore_get(&pima -> ux_device_class_pima_interrupt_thread_semaphore, UX_WAIT_FOREVER);
/* Check the completion code. */
if (status != UX_SUCCESS)
/* Do not proceed. */
return;
/* Check if we have an event to report. */
status = _ux_device_class_pima_event_get(pima, &pima_event);
/* We may have an event to report on the interrupt pipe. */
if(status == UX_SUCCESS)
{
/* Prepare the event data payload from the pima event structure. Get a pointer to the buffer area. */
buffer = transfer_request_in -> ux_slave_transfer_request_data_pointer;
/* Put the length of the entire event payload. */
_ux_utility_long_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_DATA_LENGTH, UX_DEVICE_CLASS_PIMA_AEI_MAX_LENGTH);
/* Put the type of packet (Event) */
_ux_utility_short_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_TYPE, UX_DEVICE_CLASS_PIMA_CT_EVENT_BLOCK);
/* Put the type of event. */
_ux_utility_short_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_EVENT_CODE, (USHORT)pima_event.ux_device_class_pima_event_code);
/* Put the transaction ID. */
_ux_utility_long_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_TRANSACTION_ID, pima_event.ux_device_class_pima_event_transaction_id);
/* Put the value of parameter 1. */
_ux_utility_long_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_PARAMETER_1, pima_event.ux_device_class_pima_event_parameter_1);
/* Put the value of parameter 2. */
_ux_utility_long_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_PARAMETER_2, pima_event.ux_device_class_pima_event_parameter_2);
/* Put the value of parameter 3. */
_ux_utility_long_put(buffer + UX_DEVICE_CLASS_PIMA_AEI_PARAMETER_3, pima_event.ux_device_class_pima_event_parameter_3);
/* Send the request to the device controller. */
status = _ux_device_stack_transfer_request(transfer_request_in, UX_DEVICE_CLASS_PIMA_AEI_MAX_LENGTH, UX_DEVICE_CLASS_PIMA_AEI_MAX_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(&pima -> ux_device_class_pima_interrupt_thread);
}
}
#endif
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