Merge branch 'master' of git://git.denx.de/u-boot-arm

1 files changed, 102 insertions, 0 deletions

diff --git a/drivers/rtc/s3c44b0_rtc.c b/drivers/rtc/s3c44b0_rtc.c
new file mode 100644
index 0000000..489536f
--- /dev/null
+++ b/drivers/rtc/s3c44b0_rtc.c
@@ -0,0 +1,102 @@
+/*
+ * (C) Copyright 2004
+ * DAVE Srl
+ * http://www.dave-tech.it
+ * http://www.wawnet.biz
+ * mailto:info@wawnet.biz
+ *
+ * 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
+ */
+
+/*
+ * S3C44B0 CPU specific code
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/hardware.h>
+#include <rtc.h>
+#include <bcd.h>
+
+int rtc_get (struct rtc_time* tm)
+{
+	RTCCON |= 1;
+	tm->tm_year  = BCD2BIN(BCDYEAR);
+	tm->tm_mon   = BCD2BIN(BCDMON);
+	tm->tm_wday   = BCD2BIN(BCDDATE);
+	tm->tm_mday   = BCD2BIN(BCDDAY);
+	tm->tm_hour  = BCD2BIN(BCDHOUR);
+	tm->tm_min  = BCD2BIN(BCDMIN);
+	tm->tm_sec  = BCD2BIN(BCDSEC);
+
+	if (tm->tm_sec==0) {
+		/* we have to re-read the rtc data because of the "one second deviation" problem */
+		/* see RTC datasheet for more info about it */
+		tm->tm_year  = BCD2BIN(BCDYEAR);
+		tm->tm_mon   = BCD2BIN(BCDMON);
+		tm->tm_mday   = BCD2BIN(BCDDAY);
+		tm->tm_wday   = BCD2BIN(BCDDATE);
+		tm->tm_hour  = BCD2BIN(BCDHOUR);
+		tm->tm_min  = BCD2BIN(BCDMIN);
+		tm->tm_sec  = BCD2BIN(BCDSEC);
+	}
+
+	RTCCON &= ~1;
+
+	if(tm->tm_year >= 70)
+		tm->tm_year += 1900;
+	else
+		tm->tm_year += 2000;
+
+	return 0;
+}
+
+int rtc_set (struct rtc_time* tm)
+{
+	if(tm->tm_year < 2000)
+		tm->tm_year -= 1900;
+	else
+		tm->tm_year -= 2000;
+
+	RTCCON |= 1;
+	BCDYEAR = BIN2BCD(tm->tm_year);
+	BCDMON = BIN2BCD(tm->tm_mon);
+	BCDDAY = BIN2BCD(tm->tm_mday);
+	BCDDATE = BIN2BCD(tm->tm_wday);
+	BCDHOUR = BIN2BCD(tm->tm_hour);
+	BCDMIN = BIN2BCD(tm->tm_min);
+	BCDSEC = BIN2BCD(tm->tm_sec);
+	RTCCON &= 1;
+
+	return 0;
+}
+
+void rtc_reset (void)
+{
+	RTCCON |= 1;
+	BCDYEAR = 0;
+	BCDMON = 0;
+	BCDDAY = 0;
+	BCDDATE = 0;
+	BCDHOUR = 0;
+	BCDMIN = 0;
+	BCDSEC = 0;
+	RTCCON &= 1;
+}
+