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/*
* (C) Copyright 2011 DENX Software Engineering GmbH
* Heiko Schocher <hs@denx.de>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <rtc.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#if defined(CONFIG_CMD_DATE)
struct davinci_rtc {
u_int32_t second;
u_int32_t minutes;
u_int32_t hours;
u_int32_t day;
u_int32_t month; /* 0x10 */
u_int32_t year;
u_int32_t dotw;
u_int32_t resv1;
u_int32_t alarmsecond; /* 0x20 */
u_int32_t alarmminute;
u_int32_t alarmhour;
u_int32_t alarmday;
u_int32_t alarmmonth; /* 0x30 */
u_int32_t alarmyear;
u_int32_t resv2[2];
u_int32_t ctrl; /* 0x40 */
u_int32_t status;
u_int32_t irq;
};
#define RTC_STATE_BUSY 0x01
#define RTC_STATE_RUN 0x02
#define davinci_rtc_base ((struct davinci_rtc *)DAVINCI_RTC_BASE)
int rtc_get(struct rtc_time *tmp)
{
struct davinci_rtc *rtc = davinci_rtc_base;
unsigned long sec, min, hour, mday, wday, mon_cent, year;
unsigned long status;
status = readl(&rtc->status);
if ((status & RTC_STATE_RUN) != RTC_STATE_RUN) {
printf("RTC doesn't run\n");
return -1;
}
if ((status & RTC_STATE_BUSY) == RTC_STATE_BUSY)
udelay(20);
sec = readl(&rtc->second);
min = readl(&rtc->minutes);
hour = readl(&rtc->hours);
mday = readl(&rtc->day);
wday = readl(&rtc->dotw);
mon_cent = readl(&rtc->month);
year = readl(&rtc->year);
debug("Get RTC year: %02lx mon/cent: %02lx mday: %02lx wday: %02lx "
"hr: %02lx min: %02lx sec: %02lx\n",
year, mon_cent, mday, wday,
hour, min, sec);
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_cent & 0x1F);
tmp->tm_year = bcd2bin(year) + 2000;
tmp->tm_wday = bcd2bin(wday & 0x07);
tmp->tm_yday = 0;
tmp->tm_isdst = 0;
debug("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);
return 0;
}
int rtc_set(struct rtc_time *tmp)
{
struct davinci_rtc *rtc = davinci_rtc_base;
debug("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);
writel(bin2bcd(tmp->tm_year % 100), &rtc->year);
writel(bin2bcd(tmp->tm_mon), &rtc->month);
writel(bin2bcd(tmp->tm_wday), &rtc->dotw);
writel(bin2bcd(tmp->tm_mday), &rtc->day);
writel(bin2bcd(tmp->tm_hour), &rtc->hours);
writel(bin2bcd(tmp->tm_min), &rtc->minutes);
writel(bin2bcd(tmp->tm_sec), &rtc->second);
return 0;
}
void rtc_reset(void)
{
struct davinci_rtc *rtc = davinci_rtc_base;
/* run RTC counter */
writel(0x01, &rtc->ctrl);
}
#endif
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