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/*
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-01-01 RT-Thread Clock time core
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <drivers/clock_time.h>
#define CLOCK_TIME_NSEC_PER_SEC (1000000000ULL)
static rt_uint64_t _clock_time_tick_get_freq(struct rt_clock_time_device *dev)
{
RT_UNUSED(dev);
return RT_TICK_PER_SECOND;
}
static rt_uint64_t _clock_time_tick_get_counter(struct rt_clock_time_device *dev)
{
RT_UNUSED(dev);
return (rt_uint64_t)rt_tick_get();
}
static rt_err_t _clock_time_tick_set_timeout(struct rt_clock_time_device *dev, rt_uint64_t delta)
{
RT_UNUSED(dev);
RT_UNUSED(delta);
return -RT_ENOSYS;
}
static const struct rt_clock_time_ops _clock_time_tick_ops =
{
_clock_time_tick_get_freq,
_clock_time_tick_get_counter,
_clock_time_tick_set_timeout,
};
static struct rt_clock_time_device _clock_time_tick_dev =
{
.ops = &_clock_time_tick_ops,
.res_scale = RT_CLOCK_TIME_RESMUL,
.caps = RT_CLOCK_TIME_CAP_SOURCE,
};
static struct rt_clock_time_device * _clock_time_default_source = &_clock_time_tick_dev;
static struct rt_clock_time_device * _clock_time_default_event = RT_NULL;
rt_weak void rt_clock_time_source_init(void)
{
return;
}
static rt_uint64_t _clock_time_get_res_scaled(struct rt_clock_time_device *dev)
{
rt_uint64_t freq;
rt_uint64_t scale;
if (dev == RT_NULL || dev->ops == RT_NULL || dev->ops->get_freq == RT_NULL)
{
return 0;
}
freq = dev->ops->get_freq(dev);
if (freq == 0)
{
return 0;
}
scale = dev->res_scale ? dev->res_scale : RT_CLOCK_TIME_RESMUL;
return (CLOCK_TIME_NSEC_PER_SEC * scale) / freq;
}
rt_err_t rt_clock_time_device_register(struct rt_clock_time_device *dev, const char *name, rt_uint8_t caps)
{
rt_err_t result = RT_EOK;
RT_ASSERT(dev != RT_NULL);
RT_ASSERT(dev->ops != RT_NULL);
dev->caps = caps;
if (dev->res_scale == 0)
{
dev->res_scale = RT_CLOCK_TIME_RESMUL;
}
if (name != RT_NULL)
{
dev->parent.type = RT_Device_Class_Timer;
result = rt_device_register(&dev->parent, name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
}
if ((caps & RT_CLOCK_TIME_CAP_SOURCE) && _clock_time_default_source == &_clock_time_tick_dev)
{
_clock_time_default_source = dev;
}
if ((caps & RT_CLOCK_TIME_CAP_EVENT) && _clock_time_default_event == RT_NULL)
{
_clock_time_default_event = dev;
}
return result;
}
void rt_clock_time_set_default_source(struct rt_clock_time_device *dev)
{
if (dev != RT_NULL)
{
_clock_time_default_source = dev;
}
}
void rt_clock_time_set_default_event(struct rt_clock_time_device *dev)
{
if (dev != RT_NULL)
{
_clock_time_default_event = dev;
}
}
struct rt_clock_time_device *rt_clock_time_get_default_source(void)
{
return _clock_time_default_source ? _clock_time_default_source : &_clock_time_tick_dev;
}
struct rt_clock_time_device *rt_clock_time_get_default_event(void)
{
return _clock_time_default_event;
}
rt_uint64_t rt_clock_time_get_freq(void)
{
struct rt_clock_time_device *src = rt_clock_time_get_default_source();
if (src == RT_NULL || src->ops == RT_NULL || src->ops->get_freq == RT_NULL)
{
return 0;
}
return src->ops->get_freq(src);
}
rt_uint64_t rt_clock_time_get_counter(void)
{
struct rt_clock_time_device *src = rt_clock_time_get_default_source();
if (src == RT_NULL || src->ops == RT_NULL || src->ops->get_counter == RT_NULL)
{
return 0;
}
return src->ops->get_counter(src);
}
rt_uint64_t rt_clock_time_get_res_scaled(void)
{
return _clock_time_get_res_scaled(rt_clock_time_get_default_source());
}
rt_uint64_t rt_clock_time_get_event_freq(void)
{
struct rt_clock_time_device *event = rt_clock_time_get_default_event();
if (event == RT_NULL)
{
return rt_clock_time_get_freq();
}
if (event->ops == RT_NULL || event->ops->get_freq == RT_NULL)
{
return 0;
}
return event->ops->get_freq(event);
}
rt_uint64_t rt_clock_time_get_event_res_scaled(void)
{
struct rt_clock_time_device *event = rt_clock_time_get_default_event();
if (event == RT_NULL)
{
return rt_clock_time_get_res_scaled();
}
return _clock_time_get_res_scaled(event);
}
rt_uint64_t rt_clock_time_counter_to_ns(rt_uint64_t cnt)
{
rt_uint64_t res = rt_clock_time_get_res_scaled();
if (res == 0)
{
return 0;
}
return (cnt * res) / RT_CLOCK_TIME_RESMUL;
}
rt_uint64_t rt_clock_time_ns_to_counter(rt_uint64_t ns)
{
rt_uint64_t res = rt_clock_time_get_res_scaled();
if (res == 0)
{
return 0;
}
return (ns * RT_CLOCK_TIME_RESMUL) / res;
}
rt_err_t rt_clock_time_set_timeout(rt_uint64_t delta)
{
struct rt_clock_time_device *event = rt_clock_time_get_default_event();
if (event == RT_NULL || event->ops == RT_NULL || event->ops->set_timeout == RT_NULL)
{
return -RT_ENOSYS;
}
return event->ops->set_timeout(event, delta);
}
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