[U-Boot] RFC [PATCH 1/5] drivers/rtc: add Marvell Integrated RTC.

[Jason Cooper <u-boot@lakedaemon.net>]

Signed-off-by: Jason Cooper <u-boot@lakedaemon.net>
---
 drivers/rtc/Makefile      |    1 +
 drivers/rtc/mvinteg_rtc.c |  151 +++++++++++++++++++++++++++++++++++++++++++++
 drivers/rtc/mvinteg_rtc.h |   89 ++++++++++++++++++++++++++
 3 files changed, 241 insertions(+), 0 deletions(-)
 create mode 100644 drivers/rtc/mvinteg_rtc.c
 create mode 100644 drivers/rtc/mvinteg_rtc.h

diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index e4be4a4..ed63e9c 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -55,6 +55,7 @@ COBJS-$(CONFIG_MCFRTC) += mcfrtc.o
 COBJS-$(CONFIG_RTC_MK48T59) += mk48t59.o
 COBJS-$(CONFIG_RTC_MPC5200) += mpc5xxx.o
 COBJS-$(CONFIG_RTC_MPC8xx) += mpc8xx.o
+COBJS-$(CONFIG_RTC_MVINTEG) += mvinteg_rtc.o
 COBJS-$(CONFIG_RTC_PCF8563) += pcf8563.o
 COBJS-$(CONFIG_RTC_PL031) += pl031.o
 COBJS-$(CONFIG_RTC_PT7C4338) += pt7c4338.o
diff --git a/drivers/rtc/mvinteg_rtc.c b/drivers/rtc/mvinteg_rtc.c
new file mode 100644
index 0000000..295e4f7
--- /dev/null
+++ b/drivers/rtc/mvinteg_rtc.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2011
+ * Jason Cooper <u-boot@lakedaemon.net>
+ *
+ * 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
+ */
+
+/*
+ * Date & Time support for Marvell Integrated RTC
+ */
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+#include "mvinteg_rtc.h"
+
+/* This RTC does not support century, so we assume 20 */
+#define CENTURY 20
+
+int rtc_get(struct rtc_time *t)
+{
+	u32 time;
+	u32 date;
+	u8  tens;
+	u8  single;
+
+	/* read the time register */
+	time = MV_REG_READ(MVINTEG_RTCTIME_REG);
+
+	/* read the date register */
+	date = MV_REG_READ(MVINTEG_RTCDATE_REG);
+
+	/* seconds */
+	tens   = ((time & MVINTEG_10SEC_MSK) >> MVINTEG_10SEC_SFT);
+	single = ((time & MVINTEG_SEC_MSK)   >> MVINTEG_SEC_SFT);
+	t->tm_sec = 10 * tens + single;
+
+	/* minutes */
+	tens   = ((time & MVINTEG_10MIN_MSK) >> MVINTEG_10MIN_SFT);
+	single = ((time & MVINTEG_MIN_MSK)   >> MVINTEG_MIN_SFT);
+	t->tm_min = 10 * tens + single;
+
+	/* hours */
+	tens   = ((time & MVINTEG_10HOUR_MSK) >> MVINTEG_10HOUR_SFT);
+	single = ((time & MVINTEG_HOUR_MSK)   >> MVINTEG_HOUR_SFT);
+	t->tm_hour = 10 * tens + single;
+
+	/* day */
+	t->tm_wday = ((time & MVINTEG_DAY_MSK) >> MVINTEG_DAY_SFT);
+	t->tm_wday--;
+
+	/* date */
+	tens   = ((date & MVINTEG_10DATE_MSK) >> MVINTEG_10DATE_SFT);
+	single = ((date & MVINTEG_DATE_MSK)   >> MVINTEG_DATE_SFT);
+	t->tm_mday = 10 * tens + single;
+
+	/* month */
+	tens   = ((date & MVINTEG_10MON_MSK) >> MVINTEG_10MON_SFT);
+	single = ((date & MVINTEG_MON_MSK)   >> MVINTEG_MON_SFT);
+	t->tm_mon = 10 * tens + single;
+
+	/* year */
+	tens   = ((date & MVINTEG_10YEAR_MSK) >> MVINTEG_10YEAR_SFT);
+	single = ((date & MVINTEG_YEAR_MSK)   >> MVINTEG_YEAR_SFT);
+	t->tm_year = (CENTURY * 100) + (10 * tens) + single;
+
+	/* not supported in this RTC */
+	t->tm_yday  = 0;
+	t->tm_isdst = 0;
+
+	return 0;
+}
+
+int rtc_set(struct rtc_time *t)
+{
+	u32 time = 0;
+	u32 date = 0;
+	u32 tens;
+	u32 single;
+
+	/* seconds */
+	tens   = t->tm_sec / 10;
+	single = t->tm_sec % 10;
+	time |= ((tens   << MVINTEG_10SEC_SFT) & MVINTEG_10SEC_MSK) |
+		((single << MVINTEG_SEC_SFT)   & MVINTEG_SEC_MSK);
+
+	/* minutes */
+	tens   = t->tm_min / 10;
+	single = t->tm_min % 10;
+	time |= ((tens   << MVINTEG_10MIN_SFT) & MVINTEG_10MIN_MSK) |
+		((single << MVINTEG_MIN_SFT)   & MVINTEG_MIN_MSK);
+
+	/* hours (24) */
+	tens   = t->tm_hour / 10;
+	single = t->tm_hour % 10;
+	time |= ((tens   << MVINTEG_10HOUR_SFT) & MVINTEG_10HOUR_MSK) |
+		((single << MVINTEG_HOUR_SFT)   & MVINTEG_HOUR_MSK);
+
+	/* day */
+	single = t->tm_wday + 1;
+	time |= ((single << MVINTEG_DAY_SFT) & MVINTEG_DAY_MSK);
+
+	/* date */
+	tens   = t->tm_mday / 10;
+	single = t->tm_mday % 10;
+	date |= ((tens   << MVINTEG_10DATE_SFT) & MVINTEG_10DATE_MSK) |
+		((single << MVINTEG_DATE_SFT)   & MVINTEG_DATE_MSK);
+
+	/* month */
+	tens   = t->tm_mon / 10;
+	single = t->tm_mon % 10;
+	date |= ((tens   << MVINTEG_10MON_SFT) & MVINTEG_10MON_MSK) |
+		((single << MVINTEG_MON_SFT)   & MVINTEG_MON_MSK);
+
+	/* year */
+	if ((t->tm_year / 100) != CENTURY)
+		printf("Warning: Only century %d supported.\n", CENTURY);
+	tens   = (t->tm_year % 100) / 10;
+	single = (t->tm_year % 100) % 10;
+	date |= ((tens   << MVINTEG_10YEAR_SFT) & MVINTEG_10YEAR_MSK) |
+		((single << MVINTEG_YEAR_SFT)   & MVINTEG_YEAR_MSK);
+
+	/* write the time register */
+	MV_REG_WRITE(MVINTEG_RTCTIME_REG, time);
+
+	/* write the date register */
+	MV_REG_WRITE(MVINTEG_RTCDATE_REG, date);
+
+	return 0;
+}
+
+void rtc_reset(void)
+{
+	/* no init routine for this RTC needed */
+}
diff --git a/drivers/rtc/mvinteg_rtc.h b/drivers/rtc/mvinteg_rtc.h
new file mode 100644
index 0000000..522c5d0
--- /dev/null
+++ b/drivers/rtc/mvinteg_rtc.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2011
+ * Jason Cooper <u-boot@lakedaemon.net>
+ *
+ * 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
+ */
+
+/*
+ * Date & Time support for Marvell Integrated RTC
+ */
+
+#ifndef _MVINTEG_RTC_H_
+#define _MVINTEG_RTC_H_
+
+#include <compiler.h>
+
+#define INTERNAL_REG_BASE_ADDR 0xf1000000
+
+/* register operations macros */
+#define MV_REG_READ(offset) \
+	le32_to_cpu( \
+	*(volatile unsigned int *)(INTERNAL_REG_BASE_ADDR + offset))
+
+#define MV_REG_WRITE(offset, data) \
+	do { \
+		*(volatile unsigned int *)(INTERNAL_REG_BASE_ADDR + offset) = \
+		cpu_to_le32(data); \
+	} while (0);
+
+/* RTC registers */
+#define MVINTEG_RTCTIME_REG 0x10300
+#define MVINTEG_RTCDATE_REG 0x10304
+
+/* time register */
+#define MVINTEG_SEC_SFT		0
+#define MVINTEG_SEC_MSK		(0xf << MVINTEG_SEC_SFT)
+#define MVINTEG_10SEC_SFT	4
+#define MVINTEG_10SEC_MSK	(0x7 << MVINTEG_10SEC_SFT)
+
+#define MVINTEG_MIN_SFT		8
+#define MVINTEG_MIN_MSK		(0xf << MVINTEG_MIN_SFT)
+#define MVINTEG_10MIN_SFT	12
+#define MVINTEG_10MIN_MSK	(0x7 << MVINTEG_10MIN_SFT)
+
+#define MVINTEG_HOUR_SFT	16
+#define MVINTEG_HOUR_MSK	(0xf << MVINTEG_HOUR_SFT)
+#define MVINTEG_10HOUR_SFT	20
+#define MVINTEG_10HOUR_MSK	(0x3 << MVINTEG_10HOUR_SFT)
+
+#define MVINTEG_HRFMT_SFT	22
+#define MVINTEG_HRFMT12_MSK	(0x1 << MVINTEG_HRFMT_SFT)
+#define MVINTEG_HRFMT24_MSK	(0x0 << MVINTEG_HRFMT_SFT)
+
+#define MVINTEG_DAY_SFT		24
+#define MVINTEG_DAY_MSK		(0x7 << MVINTEG_DAY_SFT)
+
+/* date register */
+#define MVINTEG_DATE_SFT	0
+#define MVINTEG_DATE_MSK	(0xf << MVINTEG_DATE_SFT)
+#define MVINTEG_10DATE_SFT	4
+#define MVINTEG_10DATE_MSK	(0x3 << MVINTEG_10DATE_SFT)
+
+#define MVINTEG_MON_SFT		8
+#define MVINTEG_MON_MSK		(0xf << MVINTEG_MON_SFT)
+#define MVINTEG_10MON_SFT	12
+#define MVINTEG_10MON_MSK	(0x1 << MVINTEG_10MON_SFT)
+
+#define MVINTEG_YEAR_SFT	16
+#define MVINTEG_YEAR_MSK	(0xf << MVINTEG_YEAR_SFT)
+#define MVINTEG_10YEAR_SFT	20
+#define MVINTEG_10YEAR_MSK	(0xf << MVINTEG_10YEAR_SFT)
+
+#endif
-- 
1.7.0.4