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/*
* SPDX-FileCopyrightText: 2020-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include <time.h>
#include <sys/time.h>
#include <sys/lock.h>
#include "esp_attr.h"
#include "esp_system.h"
#include "soc/rtc.h"
#include "esp_rom_sys.h"
#include "esp_private/system_internal.h"
#include "esp_private/esp_clk.h"
#include "esp_time_impl.h"
#include "sdkconfig.h"
#if CONFIG_IDF_TARGET_ESP32
#include "esp32/rom/rtc.h"
#include "esp32/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32S2
#include "esp32s2/rom/rtc.h"
#include "esp32s2/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32S3
#include "esp32s3/rom/rtc.h"
#include "esp32s3/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C3
#include "esp32c3/rom/rtc.h"
#include "esp32c3/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C2
#include "esp32c2/rom/rtc.h"
#include "esp32c2/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C6
#include "esp32c6/rom/rtc.h"
#include "esp32c6/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C61 //TODO: IDF-9526, refactor this
#include "esp32c61/rom/rtc.h"
#include "esp32c61/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32C5
#include "esp32c5/rom/rtc.h"
#include "esp32c5/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32H2
#include "esp32h2/rom/rtc.h"
#include "esp32h2/rtc.h"
#elif CONFIG_IDF_TARGET_ESP32P4
#include "esp32p4/rom/rtc.h"
#include "esp32p4/rtc.h"
#endif
// Offset between High resolution timer and the RTC.
// Initialized after reset or light sleep.
#if defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER) && defined(CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER)
int64_t s_microseconds_offset = 0;
#endif
#ifndef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER
static uint64_t s_boot_time; // when RTC is used to persist time, two RTC_STORE registers are used to store boot time instead
#endif
static _lock_t s_boot_time_lock;
#if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) || defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER )
uint64_t esp_time_impl_get_time_since_boot(void)
{
uint64_t microseconds = 0;
#ifdef CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER
#ifdef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER
microseconds = s_microseconds_offset + esp_system_get_time();
#else
microseconds = esp_system_get_time();
#endif // CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER
#elif defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER)
microseconds = esp_rtc_get_time_us();
#endif // CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER
return microseconds;
}
uint64_t esp_time_impl_get_time(void)
{
uint64_t microseconds = 0;
#if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER )
microseconds = esp_system_get_time();
#elif defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER )
microseconds = esp_rtc_get_time_us();
#endif // CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER
return microseconds;
}
#endif // defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) || defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER )
void esp_time_impl_set_boot_time(uint64_t time_us)
{
_lock_acquire(&s_boot_time_lock);
#ifdef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER
REG_WRITE(RTC_BOOT_TIME_LOW_REG, (uint32_t)(time_us & 0xffffffff));
REG_WRITE(RTC_BOOT_TIME_HIGH_REG, (uint32_t)(time_us >> 32));
#else
s_boot_time = time_us;
#endif
_lock_release(&s_boot_time_lock);
}
uint64_t esp_time_impl_get_boot_time(void)
{
uint64_t result;
_lock_acquire(&s_boot_time_lock);
#ifdef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER
result = ((uint64_t) REG_READ(RTC_BOOT_TIME_LOW_REG)) + (((uint64_t) REG_READ(RTC_BOOT_TIME_HIGH_REG)) << 32);
#else
result = s_boot_time;
#endif
_lock_release(&s_boot_time_lock);
return result;
}
void esp_set_time_from_rtc(void)
{
#if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) && defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER )
// initialize time from RTC clock
s_microseconds_offset = esp_rtc_get_time_us() - esp_system_get_time();
#endif // CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER && CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER
}
void esp_sync_timekeeping_timers(void)
{
#if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) && defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER )
struct timeval tv;
gettimeofday(&tv, NULL);
settimeofday(&tv, NULL);
int64_t s_microseconds_offset_cur = esp_rtc_get_time_us() - esp_system_get_time();
esp_time_impl_set_boot_time(esp_time_impl_get_boot_time() + ((int64_t)s_microseconds_offset - s_microseconds_offset_cur));
#endif
}
void esp_time_impl_init(void)
{
esp_set_time_from_rtc();
}
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