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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
* Copyright (c) 2020, Du Huanpeng <[email protected]>
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-01-30 armink the first version
* 2020-06-23 Du Huanpeng based on components/drivers/rtc/soft_rtc.c
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <sys/time.h>
#include "ls2k1000.h"
#ifdef RT_USING_RTC
struct loongson_rtc
{
rt_uint32_t sys_toytrim;
rt_uint32_t sys_toywrite0;
rt_uint32_t sys_toywrite1;
rt_uint32_t sys_toyread0;
rt_uint32_t sys_toyread1;
rt_uint32_t sys_toymatch0;
rt_uint32_t sys_toymatch1;
rt_uint32_t sys_toymatch2;
rt_uint32_t sys_rtcctrl;
rt_uint32_t __pad4[3];
rt_uint32_t __pad5[4];
rt_uint32_t sys_rtctrim;
rt_uint32_t sys_rtcwrite0;
rt_uint32_t sys_rtcread0;
rt_uint32_t sys_rtcmatch0;
rt_uint32_t sys_rtcmatch1;
rt_uint32_t sys_rtcmatch2;
};
/* bit field helpers. */
#define __M(n) (~(~0<<(n)))
#define __RBF(number, n) ((number)&__M(n))
#define __BF(number, n, m) __RBF((number>>m), (n-m+1))
#define BF(number, n, m) (m<n ? __BF(number, n, m) : __BF(number, m, n))
struct rtctime
{
rt_uint32_t sys_toyread0;
rt_uint32_t sys_toyread1;
rt_uint32_t sys_rtcread0;
};
typedef struct rtctime rtctime_t;
struct tm *localrtctime(const rtctime_t *rtctp)
{
static struct tm time;
int msec;
msec = BF(rtctp->sys_toyread0, 3, 0);
msec *= 100;
time.tm_sec = BF(rtctp->sys_toyread0, 9, 4);
time.tm_min = BF(rtctp->sys_toyread0, 15, 10);
time.tm_hour = BF(rtctp->sys_toyread0, 20, 16);
time.tm_mday = BF(rtctp->sys_toyread0, 21, 25);
time.tm_mon = BF(rtctp->sys_toyread0, 26, 31);
/* struct tm has three more members:
time.tm_isdst
time.tm_wday
time.tm_yday
*/
time.tm_mon -= 1;
time.tm_year = rtctp->sys_toyread1;
return &time;
}
rtctime_t mkrtctime(struct tm *tm)
{
rtctime_t rtctm;
struct tm tmptime;
rtctm.sys_toyread0 <<= 31 - 26 + 1;
rtctm.sys_toyread0 |= tm->tm_mon + 1;
rtctm.sys_toyread0 <<= 25 - 21 + 1;
rtctm.sys_toyread0 |= tm->tm_mday;
rtctm.sys_toyread0 <<= 20 - 16 + 1;
rtctm.sys_toyread0 |= tm->tm_hour;
rtctm.sys_toyread0 <<= 15 - 10 + 1;
rtctm.sys_toyread0 |= tm->tm_min;
rtctm.sys_toyread0 <<= 9 - 4 + 1;
rtctm.sys_toyread0 |= tm->tm_sec;
/* Fixme: 0.1 second */
rtctm.sys_toyread0 <<= 3 - 0 + 1;
rtctm.sys_toyread0 |= 0;
rtctm.sys_toyread1 = tm->tm_year;
tmptime = *localrtctime(&rtctm);
return rtctm;
}
static rt_err_t rt_rtc_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_ssize_t rt_rtc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
return 0;
}
static rt_err_t rt_rtc_ioctl(rt_device_t dev, int cmd, void *args)
{
rt_err_t err = RT_ENOSYS;
static int count = 0;
struct loongson_rtc *hw_rtc;
rtctime_t rtctm;
struct tm time;
struct tm tmptime;
time_t *t;
hw_rtc = dev->user_data;
t = (time_t *)args;
rtctm.sys_toyread0 = hw_rtc->sys_toyread0;
rtctm.sys_toyread1 = hw_rtc->sys_toyread1;
rtctm.sys_rtcread0 = hw_rtc->sys_rtcread0;
tmptime = *localrtctime(&rtctm);
switch (cmd)
{
case RT_DEVICE_CTRL_RTC_GET_TIME:
*t = timegm(&tmptime);
break;
case RT_DEVICE_CTRL_RTC_SET_TIME:
gmtime_r(t, &time);
tmptime.tm_hour = time.tm_hour;
tmptime.tm_min = time.tm_min;
tmptime.tm_sec = time.tm_sec;
tmptime.tm_year = time.tm_year;
tmptime.tm_mon = time.tm_mon;
tmptime.tm_mday = time.tm_mday;
rtctm = mkrtctime(&tmptime);
/* write to hw RTC */
hw_rtc->sys_toywrite0 = rtctm.sys_toyread0;
hw_rtc->sys_toywrite1 = rtctm.sys_toyread1;
break;
case RT_DEVICE_CTRL_RTC_GET_ALARM:
break;
case RT_DEVICE_CTRL_RTC_SET_ALARM:
break;
default:
break;
}
return RT_EOK;
}
int rt_hw_rtc_init(void)
{
static struct rt_device rtc =
{
.type = RT_Device_Class_RTC,
.init = RT_NULL,
.open = rt_rtc_open,
.close = RT_NULL,
.read = rt_rtc_read,
.write = RT_NULL,
.control = rt_rtc_ioctl,
.user_data = (void *)RTC_BASE,
};
rt_device_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
}
INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif /*RT_USING_RTC*/
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