1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
155 lines
3.7 KiB
C
155 lines
3.7 KiB
C
/*
|
|
* (C) Copyright 2003
|
|
* David Müller ELSOFT AG Switzerland. d.mueller@elsoft.ch
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
/*
|
|
* Date & Time support for the built-in Samsung S3C24X0 RTC
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
|
|
#if (defined(CONFIG_CMD_DATE))
|
|
|
|
#include <asm/arch/s3c24x0_cpu.h>
|
|
|
|
#include <rtc.h>
|
|
#include <asm/io.h>
|
|
#include <linux/compiler.h>
|
|
|
|
typedef enum {
|
|
RTC_ENABLE,
|
|
RTC_DISABLE
|
|
} RTC_ACCESS;
|
|
|
|
|
|
static inline void SetRTC_Access(RTC_ACCESS a)
|
|
{
|
|
struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
|
|
|
|
switch (a) {
|
|
case RTC_ENABLE:
|
|
writeb(readb(&rtc->rtccon) | 0x01, &rtc->rtccon);
|
|
break;
|
|
|
|
case RTC_DISABLE:
|
|
writeb(readb(&rtc->rtccon) & ~0x01, &rtc->rtccon);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int rtc_get(struct rtc_time *tmp)
|
|
{
|
|
struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
|
|
uchar sec, min, hour, mday, wday, mon, year;
|
|
__maybe_unused uchar a_sec, a_min, a_hour, a_date,
|
|
a_mon, a_year, a_armed;
|
|
|
|
/* enable access to RTC registers */
|
|
SetRTC_Access(RTC_ENABLE);
|
|
|
|
/* read RTC registers */
|
|
do {
|
|
sec = readb(&rtc->bcdsec);
|
|
min = readb(&rtc->bcdmin);
|
|
hour = readb(&rtc->bcdhour);
|
|
mday = readb(&rtc->bcddate);
|
|
wday = readb(&rtc->bcdday);
|
|
mon = readb(&rtc->bcdmon);
|
|
year = readb(&rtc->bcdyear);
|
|
} while (sec != readb(&rtc->bcdsec));
|
|
|
|
/* read ALARM registers */
|
|
a_sec = readb(&rtc->almsec);
|
|
a_min = readb(&rtc->almmin);
|
|
a_hour = readb(&rtc->almhour);
|
|
a_date = readb(&rtc->almdate);
|
|
a_mon = readb(&rtc->almmon);
|
|
a_year = readb(&rtc->almyear);
|
|
a_armed = readb(&rtc->rtcalm);
|
|
|
|
/* disable access to RTC registers */
|
|
SetRTC_Access(RTC_DISABLE);
|
|
|
|
#ifdef RTC_DEBUG
|
|
printf("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
|
|
"hr: %02x min: %02x sec: %02x\n",
|
|
year, mon, mday, wday, hour, min, sec);
|
|
printf("Alarms: %02x: year: %02x month: %02x date: %02x hour: "
|
|
"%02x min: %02x sec: %02x\n",
|
|
a_armed, a_year, a_mon, a_date, a_hour, a_min, a_sec);
|
|
#endif
|
|
|
|
tmp->tm_sec = bcd2bin(sec & 0x7F);
|
|
tmp->tm_min = bcd2bin(min & 0x7F);
|
|
tmp->tm_hour = bcd2bin(hour & 0x3F);
|
|
tmp->tm_mday = bcd2bin(mday & 0x3F);
|
|
tmp->tm_mon = bcd2bin(mon & 0x1F);
|
|
tmp->tm_year = bcd2bin(year);
|
|
tmp->tm_wday = bcd2bin(wday & 0x07);
|
|
if (tmp->tm_year < 70)
|
|
tmp->tm_year += 2000;
|
|
else
|
|
tmp->tm_year += 1900;
|
|
tmp->tm_yday = 0;
|
|
tmp->tm_isdst = 0;
|
|
#ifdef RTC_DEBUG
|
|
printf("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set(struct rtc_time *tmp)
|
|
{
|
|
struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
|
|
uchar sec, min, hour, mday, wday, mon, year;
|
|
|
|
#ifdef RTC_DEBUG
|
|
printf("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
#endif
|
|
year = bin2bcd(tmp->tm_year % 100);
|
|
mon = bin2bcd(tmp->tm_mon);
|
|
wday = bin2bcd(tmp->tm_wday);
|
|
mday = bin2bcd(tmp->tm_mday);
|
|
hour = bin2bcd(tmp->tm_hour);
|
|
min = bin2bcd(tmp->tm_min);
|
|
sec = bin2bcd(tmp->tm_sec);
|
|
|
|
/* enable access to RTC registers */
|
|
SetRTC_Access(RTC_ENABLE);
|
|
|
|
/* write RTC registers */
|
|
writeb(sec, &rtc->bcdsec);
|
|
writeb(min, &rtc->bcdmin);
|
|
writeb(hour, &rtc->bcdhour);
|
|
writeb(mday, &rtc->bcddate);
|
|
writeb(wday, &rtc->bcdday);
|
|
writeb(mon, &rtc->bcdmon);
|
|
writeb(year, &rtc->bcdyear);
|
|
|
|
/* disable access to RTC registers */
|
|
SetRTC_Access(RTC_DISABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset(void)
|
|
{
|
|
struct s3c24x0_rtc *rtc = s3c24x0_get_base_rtc();
|
|
|
|
writeb((readb(&rtc->rtccon) & ~0x06) | 0x08, &rtc->rtccon);
|
|
writeb(readb(&rtc->rtccon) & ~(0x08 | 0x01), &rtc->rtccon);
|
|
}
|
|
|
|
#endif
|