rtc, davinci: add support for davinci internal RTC

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Paulraj Sandeep <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index ca2774596db65195cbeb360bb5d42805991aeccb..df440c62ffb11aa13ff6fcffed73c17fc62e47ee 100644 (file)
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -30,6 +30,7 @@ LIB   = $(obj)librtc.o
 COBJS-$(CONFIG_RTC_AT91SAM9_RTT) += at91sam9_rtt.o
 COBJS-$(CONFIG_RTC_BFIN) += bfin_rtc.o
 COBJS-y += date.o
+COBJS-$(CONFIG_RTC_DAVINCI) += davinci.o
 COBJS-$(CONFIG_RTC_DS12887) += ds12887.o
 COBJS-$(CONFIG_RTC_DS1302) += ds1302.o
 COBJS-$(CONFIG_RTC_DS1306) += ds1306.o

diff --git a/drivers/rtc/davinci.c b/drivers/rtc/davinci.c
new file mode 100644 (file)
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