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@@ -0,0 +1,218 @@
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+/*
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+ * Copyright (c) 2020-2021, Bluetrum Development Team
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+ *
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+ * SPDX-License-Identifier: Apache-2.0
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+ *
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+ * Change Logs:
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+ * Date Author Notes
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+ * 2021-01-28 greedyhao first version
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+ */
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+
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+#include "board.h"
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+#include <time.h>
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+
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+#ifdef BSP_USING_ONCHIP_RTC
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+
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+//#define DRV_DEBUG
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+#define LOG_TAG "drv.rtc"
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+#include <drv_log.h>
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+
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+static struct rt_device rtc;
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+
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+/************** HAL Start *******************/
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+#define IRTC_ENTER_CRITICAL() uint32_t cpu_ie = PICCON & BIT(0); PICCONCLR = BIT(0);
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+#define IRTC_EXIT_CRITICAL() PICCON |= cpu_ie
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+
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+uint8_t get_weekday(struct tm *const _tm)
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+{
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+ uint8_t weekday;
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+ time_t secs = mktime(_tm);
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+
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+ weekday = (secs / 86400 + 4) % 7;
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+ return weekday;
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+}
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+
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+void irtc_write(uint32_t cmd)
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+{
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+ RTCDAT = cmd;
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+ while (RTCCON & RTC_CON_TRANS_DONE);
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+}
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+
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+uint8_t irtc_read(void)
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+{
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+ RTCDAT = 0x00;
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+ while (RTCCON & RTC_CON_TRANS_DONE);
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+ return (uint8_t)RTCDAT;
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+}
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+
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+void irtc_time_write(uint32_t cmd, uint32_t dat)
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+{
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+ IRTC_ENTER_CRITICAL();
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+ RTCCON |= RTC_CON_CHIP_SELECT;
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+ irtc_write(cmd | RTC_WR);
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+ irtc_write((uint8_t)(dat >> 24));
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+ irtc_write((uint8_t)(dat >> 16));
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+ irtc_write((uint8_t)(dat >> 8));
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+ irtc_write((uint8_t)(dat >> 0));
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+ RTCCON &= ~RTC_CON_CHIP_SELECT;
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+ IRTC_EXIT_CRITICAL();
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+}
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+
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+uint32_t irtc_time_read(uint32_t cmd)
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+{
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+ uint32_t rd_val;
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+ IRTC_ENTER_CRITICAL();
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+ RTCCON |= RTC_CON_CHIP_SELECT;
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+ irtc_write(cmd | RTC_RD);
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+ *((uint8_t *)&rd_val + 3) = irtc_read();
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+ *((uint8_t *)&rd_val + 2) = irtc_read();
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+ *((uint8_t *)&rd_val + 1) = irtc_read();
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+ *((uint8_t *)&rd_val + 0) = irtc_read();
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+ RTCCON &= ~RTC_CON_CHIP_SELECT;
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+ IRTC_EXIT_CRITICAL();
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+ return rd_val;
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+}
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+
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+void irtc_sfr_write(uint32_t cmd, uint8_t dat)
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+{
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+ IRTC_ENTER_CRITICAL();
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+ RTCCON |= RTC_CON_CHIP_SELECT;
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+ irtc_write(cmd | RTC_WR);
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+ irtc_write(dat);
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+ RTCCON &= ~RTC_CON_CHIP_SELECT;
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+ IRTC_EXIT_CRITICAL();
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+}
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+
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+uint8_t irtc_sfr_read(uint32_t cmd)
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+{
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+ uint8_t rd_val;
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+ IRTC_ENTER_CRITICAL();
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+ RTCCON |= RTC_CON_CHIP_SELECT;
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+ irtc_write(cmd | RTC_RD);
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+ rd_val = irtc_read();
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+ RTCCON &= ~RTC_CON_CHIP_SELECT;
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+ IRTC_EXIT_CRITICAL();
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+}
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+
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+void hal_rtc_init(void)
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+{
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+ time_t sec = 0;
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+ struct tm tm_new = {0};
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+
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+ uint8_t temp = irtc_sfr_read(RTCCON0_CMD);
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+ temp &= ~RTC_CON0_XOSC32K_ENABLE;
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+ temp |= RTC_CON0_EXTERNAL_32K;
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+ irtc_sfr_write(RTCCON0_CMD, temp);
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+ temp = irtc_sfr_read(RTCCON2_CMD);
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+ irtc_sfr_write(RTCCON2_CMD, temp | RTC_CON2_32K_SELECT);
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+
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+ temp = irtc_sfr_read(RTCCON0_CMD);
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+ if (temp & BIT(7)) {
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+ temp &= ~BIT(7);
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+ irtc_sfr_write(RTCCON0_CMD, temp); /* First power on */
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+ }
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+
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+ tm_new.tm_mday = 29;
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+ tm_new.tm_mon = 1 - 1;
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+ tm_new.tm_year = 2021 - 1900;
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+ sec = mktime(&tm_new);
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+
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+ irtc_time_write(RTCCNT_CMD, sec);
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+}
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+/************** HAL End *******************/
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+
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+static time_t get_rtc_timestamp(void)
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+{
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+ time_t sec = 0;
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+
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+ sec = irtc_time_read(RTCCNT_CMD);
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+ LOG_D("get rtc time.");
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+ return sec;
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+}
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+
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+static rt_err_t set_rtc_time_stamp(time_t time_stamp)
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+{
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+ irtc_time_write(RTCCNT_CMD, time_stamp);
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+
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+ return RT_EOK;
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+}
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+
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+static void rt_rtc_init(void)
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+{
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+ hal_rtc_init();
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+}
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+
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+static rt_err_t rt_rtc_control(rt_device_t dev, int cmd, void *args)
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+{
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+ rt_err_t result = RT_EOK;
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+ RT_ASSERT(dev != RT_NULL);
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+ switch (cmd)
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+ {
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+ case RT_DEVICE_CTRL_RTC_GET_TIME:
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+ *(rt_uint32_t *)args = get_rtc_timestamp();
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+ LOG_D("RTC: get rtc_time %x\n", *(rt_uint32_t *)args);
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+ break;
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+
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+ case RT_DEVICE_CTRL_RTC_SET_TIME:
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+ if (set_rtc_time_stamp(*(rt_uint32_t *)args))
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+ {
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+ result = -RT_ERROR;
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+ }
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+ LOG_D("RTC: set rtc_time %x\n", *(rt_uint32_t *)args);
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+ break;
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+ }
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+
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+ return result;
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+}
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+
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+#ifdef RT_USING_DEVICE_OPS
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+const static struct rt_device_ops rtc_ops =
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+{
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+ RT_NULL,
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+ RT_NULL,
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+ RT_NULL,
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+ RT_NULL,
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+ RT_NULL,
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+ rt_rtc_control
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+};
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+#endif
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+
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+static rt_err_t rt_hw_rtc_register(rt_device_t device, const char *name, rt_uint32_t flag)
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+{
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+ RT_ASSERT(device != RT_NULL);
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+
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+ rt_rtc_init();
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+#ifdef RT_USING_DEVICE_OPS
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+ device->ops = &rtc_ops;
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+#else
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+ device->init = RT_NULL;
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+ device->open = RT_NULL;
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+ device->close = RT_NULL;
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+ device->read = RT_NULL;
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+ device->write = RT_NULL;
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+ device->control = rt_rtc_control;
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+#endif
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+ device->type = RT_Device_Class_RTC;
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+ device->rx_indicate = RT_NULL;
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+ device->tx_complete = RT_NULL;
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+ device->user_data = RT_NULL;
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+
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+ /* register a character device */
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+ return rt_device_register(device, name, flag);
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+}
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+
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+int rt_hw_rtc_init(void)
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+{
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+ rt_err_t result;
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+ result = rt_hw_rtc_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
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+ if (result != RT_EOK)
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+ {
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+ LOG_E("rtc register err code: %d", result);
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+ return result;
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+ }
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+ LOG_D("rtc init success");
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+ return RT_EOK;
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+}
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+INIT_DEVICE_EXPORT(rt_hw_rtc_init);
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+
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+#endif /* BSP_USING_ONCHIP_RTC */
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