Merge with git://www.denx.de/git/u-boot.git

1 files changed, 143 insertions, 0 deletions

diff --git a/drivers/rtc/bf5xx_rtc.c b/drivers/rtc/bf5xx_rtc.c
new file mode 100644
index 0000000..8856bb9
--- /dev/null
+++ b/drivers/rtc/bf5xx_rtc.c
@@ -0,0 +1,143 @@
+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@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
+ * Real Time Clock interface of ADI21535 (Blackfin) for uCLinux
+ *
+ * Copyright (C) 2003 Motorola Corporation.  All rights reserved.
+ * 				Richard Xiao (A2590C@email.mot.com)
+ *
+ * Copyright (C) 1996 Paul Gortmaker
+ *
+ *
+ *	Based on other minimal char device drivers, like Alan's
+ *	watchdog, Ted's random, etc. etc.
+ *
+ *	1.07	Paul Gortmaker.
+ *	1.08	Miquel van Smoorenburg: disallow certain things on the
+ *		DEC Alpha as the CMOS clock is also used for other things.
+ *	1.09	Nikita Schmidt: epoch support and some Alpha cleanup.
+ *	1.09a	Pete Zaitcev: Sun SPARC
+ *	1.09b	Jeff Garzik: Modularize, init cleanup
+ *	1.09c	Jeff Garzik: SMP cleanup
+ *	1.10    Paul Barton-Davis: add support for async I/O
+ *	1.10a	Andrea Arcangeli: Alpha updates
+ *	1.10b	Andrew Morton: SMP lock fix
+ *	1.10c	Cesar Barros: SMP locking fixes and cleanup
+ *	1.10d	Paul Gortmaker: delete paranoia check in rtc_exit
+ *	1.10e   LG Soft India: Register access is different in BF533.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+
+#if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE)
+
+#include <asm/blackfin.h>
+#include <asm/arch/bf5xx_rtc.h>
+
+void rtc_reset(void)
+{
+	return;			/* nothing to do */
+}
+
+/* Wait for pending writes to complete */
+void wait_for_complete(void)
+{
+	while (!(*(volatile unsigned short *)RTC_ISTAT & 0x8000)) {
+		printf("");
+	}
+	*(volatile unsigned short *)RTC_ISTAT = 0x8000;
+}
+
+/* Enable the RTC prescaler enable register */
+void rtc_init()
+{
+	*(volatile unsigned short *)RTC_PREN = 0x1;
+	wait_for_complete();
+}
+
+/* Set the time. Get the time_in_secs which is the number of seconds since Jan 1970 and set the RTC registers
+ * based on this value.
+ */
+void rtc_set(struct rtc_time *tmp)
+{
+	unsigned long n_days_1970 = 0;
+	unsigned long n_secs_rem = 0;
+	unsigned long n_hrs = 0;
+	unsigned long n_mins = 0;
+	unsigned long n_secs = 0;
+	unsigned long time_in_secs;
+
+	if (tmp == NULL) {
+		printf("Error setting the date/time \n");
+		return;
+	}
+
+	time_in_secs =
+	    mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_hour,
+		   tmp->tm_min, tmp->tm_sec);
+
+	/* Compute no. of days since 1970 */
+	n_days_1970 = (unsigned long)(time_in_secs / (NUM_SECS_IN_DAY));
+
+	/* From the remining secs, compute the hrs(0-23), mins(0-59) and secs(0-59) */
+	n_secs_rem = (unsigned long)(time_in_secs % (NUM_SECS_IN_DAY));
+	n_hrs = n_secs_rem / (NUM_SECS_IN_HOUR);
+	n_secs_rem = n_secs_rem % (NUM_SECS_IN_HOUR);
+	n_mins = n_secs_rem / (NUM_SECS_IN_MIN);
+	n_secs = n_secs_rem % (NUM_SECS_IN_MIN);
+
+	/* Store the new time in the RTC_STAT register */
+	*(volatile unsigned long *)RTC_STAT =
+	    ((n_days_1970 << DAY_BITS_OFF) | (n_hrs << HOUR_BITS_OFF) |
+	     (n_mins << MIN_BITS_OFF) | (n_secs << SEC_BITS_OFF));
+
+	wait_for_complete();
+}
+
+/* Read the time from the RTC_STAT. time_in_seconds is seconds since Jan 1970 */
+void rtc_get(struct rtc_time *tmp)
+{
+	unsigned long cur_rtc_stat = 0;
+	unsigned long time_in_sec;
+	unsigned long tm_sec = 0, tm_min = 0, tm_hour = 0, tm_day = 0;
+
+	if (tmp == NULL) {
+		printf("Error getting the date/time \n");
+		return;
+	}
+
+	/* Read the RTC_STAT register */
+	cur_rtc_stat = *(volatile unsigned long *)RTC_STAT;
+
+	/* Get the secs (0-59), mins (0-59), hrs (0-23) and the days since Jan 1970 */
+	tm_sec = (cur_rtc_stat >> SEC_BITS_OFF) & 0x3f;
+	tm_min = (cur_rtc_stat >> MIN_BITS_OFF) & 0x3f;
+	tm_hour = (cur_rtc_stat >> HOUR_BITS_OFF) & 0x1f;
+	tm_day = (cur_rtc_stat >> DAY_BITS_OFF) & 0x7fff;
+
+	/* Calculate the total number of seconds since Jan 1970 */
+	time_in_sec = (tm_sec) +
+	    MIN_TO_SECS(tm_min) + HRS_TO_SECS(tm_hour) + DAYS_TO_SECS(tm_day);
+	to_tm(time_in_sec, tmp);
+}
+#endif