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/*
* Copyright (c) 2021-2025 HPMicro
*
* SPDX-License-Identifier: BSD-3-Clause
*
* Change Logs:
* Date Author Notes
* 2021-09-19 HPMicro First version
* 2023-05-08 HPMicro Adapt RT-Thread V5.0.0
* 2025-05-23 HPMicro Support setting and getting timeval
* 2025-05-26 HPMicro Support 64-bit time_t and alarm set/getting
*/
#include "board.h"
#include "drv_rtc.h"
#include "hpm_rtc_drv.h"
#include "hpm_bpor_drv.h"
#include <rtthread.h>
#include <rtdevice.h>
#include <rtdbg.h>
#ifdef RT_USING_RTC
/*******************************************************************************************
*
* Prototypes
*
******************************************************************************************/
static rt_err_t hpm_rtc_init(rt_device_t dev);
static rt_err_t hpm_rtc_open(rt_device_t dev, rt_uint16_t oflag);
static rt_err_t hpm_rtc_close(rt_device_t dev);
static rt_ssize_t hpm_rtc_read(rt_device_t dev, rt_off_t pos, void *buf, rt_size_t size);
static rt_ssize_t hpm_rtc_write(rt_device_t dev, rt_off_t pos, const void *buf, rt_size_t size);
static rt_err_t hpm_rtc_control(rt_device_t dev, int cmd, void *args);
static time_t hpm_rtc_get_timestamp(void);
static int hpm_rtc_set_timestamp(time_t timestamp);
static int hpm_rtc_set_alarm(struct rt_rtc_wkalarm *alarm);
static int hpm_rtc_get_alarm(struct rt_rtc_wkalarm *alarm);
/*******************************************************************************************
*
* Variables
*
******************************************************************************************/
#ifdef RT_USING_DEVICE_OPS
const struct rt_device_ops hpm_rtc_ops = {
.init = hpm_rtc_init,
.open = hpm_rtc_open,
.close = hpm_rtc_close,
.read = hpm_rtc_read,
.write = hpm_rtc_write,
.control = hpm_rtc_control,
};
#endif
static struct rt_device hpm_rtc= {
.type = RT_Device_Class_RTC,
#ifdef RT_USING_DEVICE_OPS
.ops = &hpm_rtc_ops,
#else
.init = hpm_rtc_init,
.open = hpm_rtc_open,
.close = hpm_rtc_close,
.read = hpm_rtc_read,
.write = hpm_rtc_write,
.control = hpm_rtc_control,
#endif
};
#ifdef HPM_USING_RTTHREAD_INTERRUPT_FRAMEWORK
static struct rtc_isr_t {
RTC_Type *rtc_base;
struct rt_device *rtc_dev;
} hpm_rtc_isr;
#endif /* HPM_USING_RTTHREAD_INTERRUPT_FRAMEWORK */
/*****************************************************
* RTC interrupt handler
******************************************************/
#ifdef RT_USING_ALARM
#ifndef HPM_USING_RTTHREAD_INTERRUPT_FRAMEWORK
void rtc_isr(void)
{
uint32_t rtc_alarm_flag = rtc_get_alarm_flags(HPM_RTC);
if ((rtc_alarm_flag & RTC_ALARM_FLAG_ALARM0_MASK) != 0)
{
rt_alarm_update(&hpm_rtc, 1);
}
rtc_clear_alarm_flags(HPM_RTC, RTC_ALARM_FLAG_ALARM0_MASK | RTC_ALARM_FLAG_ALARM1_MASK);
}
SDK_DECLARE_EXT_ISR_M(IRQn_RTC, rtc_isr);
#else
void rtc_isr(int vector, struct rtc_isr_t *hpm_rtc)
{
RTC_Type *rtc_base = hpm_rtc->rtc_base;
struct rt_device *rtc_dev = hpm_rtc->rtc_dev;
uint32_t rtc_alarm_flag = rtc_get_alarm_flags(rtc_base);
if ((rtc_alarm_flag & RTC_ALARM_FLAG_ALARM0_MASK) != 0)
{
rt_alarm_update(rtc_dev, 1);
}
rtc_clear_alarm_flags(rtc_base, RTC_ALARM_FLAG_ALARM0_MASK | RTC_ALARM_FLAG_ALARM1_MASK);
}
#endif /* HPM_USING_RTTHREAD_INTERRUPT_FRAMEWORK */
#endif
/*******************************************************************************************
*
* Codes
*
******************************************************************************************/
static rt_err_t hpm_rtc_init(rt_device_t dev)
{
/* Enable Power retention mode for the battery domain */
bpor_enable_reg_value_retention(HPM_BPOR);
return RT_EOK;
}
static rt_err_t hpm_rtc_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t hpm_rtc_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_ssize_t hpm_rtc_read(rt_device_t dev, rt_off_t pos, void *buf, rt_size_t size)
{
return 0;
}
static rt_ssize_t hpm_rtc_write(rt_device_t dev, rt_off_t pos, const void *buf, rt_size_t size)
{
return 0;
}
static rt_err_t hpm_rtc_control(rt_device_t dev, int cmd, void *args)
{
RT_ASSERT(dev != RT_NULL);
rt_err_t err = RT_EOK;
struct timeval tv;
if (args == RT_NULL)
{
return -RT_EINVAL;
}
switch(cmd) {
case RT_DEVICE_CTRL_RTC_GET_TIME:
if (sizeof(uint32_t) == sizeof(time_t)) {
*(uint32_t *)args = hpm_rtc_get_timestamp();
} else if (sizeof(uint64_t) == sizeof(time_t)) {
*(uint64_t *)args = hpm_rtc_get_timestamp();
}
break;
case RT_DEVICE_CTRL_RTC_SET_TIME:
hpm_rtc_set_timestamp(*(time_t *)args);
break;
case RT_DEVICE_CTRL_RTC_GET_TIMEVAL:
tv = rtc_get_timeval(HPM_RTC);
memcpy(args, &tv, sizeof(tv));
break;
case RT_DEVICE_CTRL_RTC_SET_TIMEVAL:
memcpy(&tv, args, sizeof(tv));
rtc_config_time(HPM_RTC, tv.tv_sec);
break;
case RT_DEVICE_CTRL_RTC_SET_ALARM:
err = hpm_rtc_set_alarm((struct rt_rtc_wkalarm *)args);
break;
case RT_DEVICE_CTRL_RTC_GET_ALARM:
err = hpm_rtc_get_alarm((struct rt_rtc_wkalarm *)args);
break;
default:
err = -RT_EINVAL;
break;
}
return err;
}
static time_t hpm_rtc_get_timestamp(void)
{
time_t time = rtc_get_time(HPM_RTC);
return time;
}
static int hpm_rtc_set_timestamp(time_t timestamp)
{
(void)rtc_config_time(HPM_RTC, timestamp);
return RT_EOK;
}
static int hpm_rtc_set_alarm(struct rt_rtc_wkalarm *alarm)
{
#ifdef RT_USING_ALARM
rtc_alarm_config_t config;
time_t now;
time_t alarm_time;
struct tm tm_alarm = {0};
if (alarm->enable == RT_TRUE) {
/* Clear all pending interrupt flags first */
rtc_clear_alarm_flag(HPM_RTC, 0);
rtc_clear_alarm_flag(HPM_RTC, 1);
tm_alarm.tm_sec = alarm->tm_sec;
tm_alarm.tm_min = alarm->tm_min;
tm_alarm.tm_hour = alarm->tm_hour;
tm_alarm.tm_mday = alarm->tm_mday;
tm_alarm.tm_mon = alarm->tm_mon;
tm_alarm.tm_year = alarm->tm_year;
#ifdef RT_ALARM_USING_LOCAL_TIME
alarm_time = mktime(&tm_alarm);
#else
alarm_time = timegm(&tm_alarm);
#endif
now = rtc_get_time(HPM_RTC);
if (alarm_time <= now) {
return -RT_ERROR;
}
config.period = alarm_time;
config.type = RTC_ALARM_TYPE_ABSOLUTE_TIME_ONE_SHOT;
config.index = 0;
if (rtc_config_alarm(HPM_RTC, &config) != status_success) {
return -RT_ERROR;
}
rtc_enable_alarm_interrupt(HPM_RTC, 0, true);
intc_m_enable_irq_with_priority(IRQn_RTC, 1);
} else {
rtc_enable_alarm_interrupt(HPM_RTC, 0, false);
intc_m_disable_irq(IRQn_RTC);
}
return RT_EOK;
#else
return -RT_EINVAL;
#endif
}
static int hpm_rtc_get_alarm(struct rt_rtc_wkalarm *alarm)
{
#ifdef RT_USING_ALARM
time_t alarm_time;
struct tm alarm_tm;
if (RTC_ALARM_EN_ENABLE0_GET(HPM_RTC->ALARM_EN) == 0) {
alarm->enable = RT_FALSE;
} else {
alarm->enable = RT_TRUE;
}
alarm_time = RTC_ALARM0_ALARM_GET(HPM_RTC->ALARM0);
#ifdef RT_ALARM_USING_LOCAL_TIME
localtime_r(&alarm_time, &alarm_tm);
#else
gmtime_r(&alarm_time, &alarm_tm);
#endif
alarm->tm_sec = alarm_tm.tm_sec;
alarm->tm_min = alarm_tm.tm_min;
alarm->tm_hour = alarm_tm.tm_hour;
alarm->tm_mday = alarm_tm.tm_mday;
alarm->tm_mon = alarm_tm.tm_mon;
alarm->tm_year = alarm_tm.tm_year;
return RT_EOK;
#else
return -RT_EINVAL;
#endif
}
int rt_hw_rtc_init(void)
{
rt_err_t err = RT_EOK;
err = rt_device_register(&hpm_rtc, "rtc", RT_DEVICE_FLAG_RDWR);
if (err != RT_EOK) {
LOG_E("rt device %s failed, status=%d\n", "rtc", err);
return err;
}
rt_device_open(&hpm_rtc, RT_DEVICE_FLAG_RDWR);
#ifdef RT_USING_ALARM
#ifdef HPM_USING_RTTHREAD_INTERRUPT_FRAMEWORK
hpm_rtc_isr.rtc_base = HPM_RTC;
hpm_rtc_isr.rtc_dev = &hpm_rtc;
/* Register RTC device to irq table */
rt_hw_interrupt_install(IRQn_RTC, (rt_isr_handler_t)rtc_isr, &hpm_rtc_isr, "RTC");
#endif
#endif /* HPM_USING_RTTHREAD_INTERRUPT_FRAMEWORK */
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif /* RT_USING_RTC */
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