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bsp: ls2k: internal rtc driver
hardware date format year, the same as ctime month 1 ~ 12 no leap second Signed-off-by: Du Huanpeng <[email protected]>
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‎bsp/ls2kdev/drivers/drv_rtc.c‎

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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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* Copyright (c) 2020, Du Huanpeng <[email protected]>
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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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* 2018-01-30 armink the first version
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* 2020-06-23 Du Huanpeng based on components/drivers/rtc/soft_rtc.c
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <rtthread.h>
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#include "ls2k1000.h"
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struct loongson_rtc {
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rt_uint32_t sys_toytrim;
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rt_uint32_t sys_toywrite0;
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rt_uint32_t sys_toywrite1;
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rt_uint32_t sys_toyread0;
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rt_uint32_t sys_toyread1;
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rt_uint32_t sys_toymatch0;
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rt_uint32_t sys_toymatch1;
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rt_uint32_t sys_toymatch2;
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rt_uint32_t sys_rtcctrl;
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rt_uint32_t __pad4[3];
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rt_uint32_t __pad5[4];
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rt_uint32_t sys_rtctrim;
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rt_uint32_t sys_rtcwrite0;
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rt_uint32_t sys_rtcread0;
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rt_uint32_t sys_rtcmatch0;
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rt_uint32_t sys_rtcmatch1;
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rt_uint32_t sys_rtcmatch2;
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};
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/* bit field helpers. */
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#define __M(n) (~(~0<<(n)))
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#define __RBF(number, n) ((number)&__M(n))
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#define __BF(number, n, m) __RBF((number>>m), (n-m+1))
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#define BF(number, n, m) (m<n ? __BF(number, n, m) : __BF(number, m, n))
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struct rtctime {
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rt_uint32_t sys_toyread0;
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rt_uint32_t sys_toyread1;
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rt_uint32_t sys_rtcread0;
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};
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typedef struct rtctime rtctime_t;
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struct tm *localrtctime(const rtctime_t *rtctp)
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{
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static struct tm time;
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int msec;
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msec = BF(rtctp->sys_toyread0, 3, 0);
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msec *= 100;
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time.tm_sec = BF(rtctp->sys_toyread0, 9, 4);
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time.tm_min = BF(rtctp->sys_toyread0, 15, 10);
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time.tm_hour = BF(rtctp->sys_toyread0, 20, 16);
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time.tm_mday = BF(rtctp->sys_toyread0, 21, 25);
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time.tm_mon = BF(rtctp->sys_toyread0, 26, 31);
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/* struct tm has three more members:
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time.tm_isdst
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time.tm_wday
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time.tm_yday
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*/
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time.tm_mon -= 1;
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time.tm_year = rtctp->sys_toyread1;
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return &time;
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}
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rtctime_t mkrtctime(struct tm *tm)
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{
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rtctime_t rtctm;
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struct tm tmptime;
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rtctm.sys_toyread0 <<= 31 - 26 + 1;
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rtctm.sys_toyread0 |= tm->tm_mon + 1;
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rtctm.sys_toyread0 <<= 25 - 21 + 1;
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rtctm.sys_toyread0 |= tm->tm_mday;
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rtctm.sys_toyread0 <<= 20 - 16 + 1;
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rtctm.sys_toyread0 |= tm->tm_hour;
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rtctm.sys_toyread0 <<= 15 - 10 + 1;
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rtctm.sys_toyread0 |= tm->tm_min;
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rtctm.sys_toyread0 <<= 9 - 4 + 1;
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rtctm.sys_toyread0 |= tm->tm_sec;
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/* Fixme: 0.1 second */
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rtctm.sys_toyread0 <<= 3 - 0 + 1;
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rtctm.sys_toyread0 |= 0;
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rtctm.sys_toyread1 = tm->tm_year;
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tmptime = *localrtctime(&rtctm);
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return rtctm;
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}
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static rt_err_t rt_rtc_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_size_t rt_rtc_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
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{
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return 0;
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}
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static rt_err_t rt_rtc_ioctl(rt_device_t dev, int cmd, void *args)
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{
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rt_err_t err = RT_ENOSYS;
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static int count = 0;
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struct loongson_rtc *hw_rtc;
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rtctime_t rtctm;
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struct tm time;
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struct tm tmptime;
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time_t *t;
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hw_rtc = dev->user_data;
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t = (time_t *)args;
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time = *localtime(t);
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rtctm.sys_toyread0 = hw_rtc->sys_toyread0;
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rtctm.sys_toyread1 = hw_rtc->sys_toyread1;
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rtctm.sys_rtcread0 = hw_rtc->sys_rtcread0;
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tmptime = *localrtctime(&rtctm);
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switch (cmd) {
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case RT_DEVICE_CTRL_RTC_GET_TIME:
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*t = mktime(&tmptime);
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break;
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case RT_DEVICE_CTRL_RTC_SET_TIME:
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tmptime.tm_hour = time.tm_hour;
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tmptime.tm_min = time.tm_min;
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tmptime.tm_sec = time.tm_sec;
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tmptime.tm_year = time.tm_year;
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tmptime.tm_mon = time.tm_mon;
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tmptime.tm_mday = time.tm_mday;
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rtctm = mkrtctime(&tmptime);
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/* write to hw RTC */
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hw_rtc->sys_toywrite0 = rtctm.sys_toyread0;
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hw_rtc->sys_toywrite1 = rtctm.sys_toyread1;
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break;
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case RT_DEVICE_CTRL_RTC_GET_ALARM:
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break;
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case RT_DEVICE_CTRL_RTC_SET_ALARM:
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break;
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default:
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break;
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}
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return RT_EOK;
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}
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int rt_hw_rtc_init(void)
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{
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static struct rt_device rtc = {
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.type = RT_Device_Class_RTC,
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.init = RT_NULL,
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.open = rt_rtc_open,
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.close = RT_NULL,
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.read = rt_rtc_read,
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.write = RT_NULL,
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.control = rt_rtc_ioctl,
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.user_data = (void *)RTC_BASE,
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};
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rt_device_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
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}
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INIT_DEVICE_EXPORT(rt_hw_rtc_init);

‎bsp/ls2kdev/drivers/ls2k1000.h‎

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#define GPIO_BASE 0xFFFFFFFFBFE10500
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#define PLL_SYS_BASE 0xFFFFFFFFBFE10480
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#define RTC_BASE 0xFFFFFFFFBFE07820
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void rt_hw_timer_handler(void);
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void rt_hw_uart_init(void);

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