diff options
Diffstat (limited to 'drivers/rtc/davinci.c')
| -rw-r--r-- | drivers/rtc/davinci.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/rtc/davinci.c b/drivers/rtc/davinci.c new file mode 100644 index 0000000..8436cbf --- /dev/null +++ b/drivers/rtc/davinci.c @@ -0,0 +1,125 @@ +/* + * (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 |