[U-Boot] [PATCH] drivers/rtc: add Marvell Integrated RTC.
Jason Cooper
u-boot at lakedaemon.net
Mon Aug 1 02:48:05 CEST 2011
This driver can be used for kirkwood SoCs by enabling CONFIG_RTC_MVINTEG.
Tested on Global Scale Technologies Dreamplug.
Signed-off-by: Jason Cooper <u-boot at lakedaemon.net>
---
Changes from v1:
- renamed files to mvrtc.{c,h}
- used proper c-structs for register access
- used existing macros for register access
- removed RFC
arch/arm/include/asm/arch-kirkwood/kirkwood.h | 1 +
drivers/rtc/Makefile | 1 +
drivers/rtc/mvrtc.c | 157 +++++++++++++++++++++++++
drivers/rtc/mvrtc.h | 79 +++++++++++++
4 files changed, 238 insertions(+), 0 deletions(-)
create mode 100644 drivers/rtc/mvrtc.c
create mode 100644 drivers/rtc/mvrtc.h
diff --git a/arch/arm/include/asm/arch-kirkwood/kirkwood.h b/arch/arm/include/asm/arch-kirkwood/kirkwood.h
index 0104418..3c843a0 100644
--- a/arch/arm/include/asm/arch-kirkwood/kirkwood.h
+++ b/arch/arm/include/asm/arch-kirkwood/kirkwood.h
@@ -50,6 +50,7 @@
#define KW_MPP_BASE (KW_REGISTER(0x10000))
#define KW_GPIO0_BASE (KW_REGISTER(0x10100))
#define KW_GPIO1_BASE (KW_REGISTER(0x10140))
+#define KW_RTC_BASE (KW_REGISTER(0x10300))
#define KW_NANDF_BASE (KW_REGISTER(0x10418))
#define KW_SPI_BASE (KW_REGISTER(0x10600))
#define KW_CPU_WIN_BASE (KW_REGISTER(0x20000))
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index e4be4a4..e1591a0 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-$(CONFIG_RTC_MVINTEG) += mvrtc.o
COBJS-$(CONFIG_RTC_PCF8563) += pcf8563.o
COBJS-$(CONFIG_RTC_PL031) += pl031.o
COBJS-$(CONFIG_RTC_PT7C4338) += pt7c4338.o
diff --git a/drivers/rtc/mvrtc.c b/drivers/rtc/mvrtc.c
new file mode 100644
index 0000000..0db3b20
--- /dev/null
+++ b/drivers/rtc/mvrtc.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2011
+ * Jason Cooper <u-boot at 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 "mvrtc.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;
+ struct mvrtc_registers *mvrtc_regs;
+
+ mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+ /* read the time register */
+ time = readl(&mvrtc_regs->time);
+
+ /* read the date register */
+ date = readl(&mvrtc_regs->date);
+
+ /* seconds */
+ tens = ((time & MVRTC_10SEC_MSK) >> MVRTC_10SEC_SFT);
+ single = ((time & MVRTC_SEC_MSK) >> MVRTC_SEC_SFT);
+ t->tm_sec = 10 * tens + single;
+
+ /* minutes */
+ tens = ((time & MVRTC_10MIN_MSK) >> MVRTC_10MIN_SFT);
+ single = ((time & MVRTC_MIN_MSK) >> MVRTC_MIN_SFT);
+ t->tm_min = 10 * tens + single;
+
+ /* hours */
+ tens = ((time & MVRTC_10HOUR_MSK) >> MVRTC_10HOUR_SFT);
+ single = ((time & MVRTC_HOUR_MSK) >> MVRTC_HOUR_SFT);
+ t->tm_hour = 10 * tens + single;
+
+ /* day */
+ t->tm_wday = ((time & MVRTC_DAY_MSK) >> MVRTC_DAY_SFT);
+ t->tm_wday--;
+
+ /* date */
+ tens = ((date & MVRTC_10DATE_MSK) >> MVRTC_10DATE_SFT);
+ single = ((date & MVRTC_DATE_MSK) >> MVRTC_DATE_SFT);
+ t->tm_mday = 10 * tens + single;
+
+ /* month */
+ tens = ((date & MVRTC_10MON_MSK) >> MVRTC_10MON_SFT);
+ single = ((date & MVRTC_MON_MSK) >> MVRTC_MON_SFT);
+ t->tm_mon = 10 * tens + single;
+
+ /* year */
+ tens = ((date & MVRTC_10YEAR_MSK) >> MVRTC_10YEAR_SFT);
+ single = ((date & MVRTC_YEAR_MSK) >> MVRTC_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;
+ struct mvrtc_registers *mvrtc_regs;
+
+ mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
+
+ /* seconds */
+ tens = t->tm_sec / 10;
+ single = t->tm_sec % 10;
+ time |= ((tens << MVRTC_10SEC_SFT) & MVRTC_10SEC_MSK) |
+ ((single << MVRTC_SEC_SFT) & MVRTC_SEC_MSK);
+
+ /* minutes */
+ tens = t->tm_min / 10;
+ single = t->tm_min % 10;
+ time |= ((tens << MVRTC_10MIN_SFT) & MVRTC_10MIN_MSK) |
+ ((single << MVRTC_MIN_SFT) & MVRTC_MIN_MSK);
+
+ /* hours (24) */
+ tens = t->tm_hour / 10;
+ single = t->tm_hour % 10;
+ time |= ((tens << MVRTC_10HOUR_SFT) & MVRTC_10HOUR_MSK) |
+ ((single << MVRTC_HOUR_SFT) & MVRTC_HOUR_MSK);
+
+ /* day */
+ single = t->tm_wday + 1;
+ time |= ((single << MVRTC_DAY_SFT) & MVRTC_DAY_MSK);
+
+ /* date */
+ tens = t->tm_mday / 10;
+ single = t->tm_mday % 10;
+ date |= ((tens << MVRTC_10DATE_SFT) & MVRTC_10DATE_MSK) |
+ ((single << MVRTC_DATE_SFT) & MVRTC_DATE_MSK);
+
+ /* month */
+ tens = t->tm_mon / 10;
+ single = t->tm_mon % 10;
+ date |= ((tens << MVRTC_10MON_SFT) & MVRTC_10MON_MSK) |
+ ((single << MVRTC_MON_SFT) & MVRTC_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 << MVRTC_10YEAR_SFT) & MVRTC_10YEAR_MSK) |
+ ((single << MVRTC_YEAR_SFT) & MVRTC_YEAR_MSK);
+
+ /* write the time register */
+ writel(time, &mvrtc_regs->time);
+
+ /* write the date register */
+ writel(date, &mvrtc_regs->date);
+
+ return 0;
+}
+
+void rtc_reset(void)
+{
+ /* no init routine for this RTC needed */
+}
diff --git a/drivers/rtc/mvrtc.h b/drivers/rtc/mvrtc.h
new file mode 100644
index 0000000..286b223
--- /dev/null
+++ b/drivers/rtc/mvrtc.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2011
+ * Jason Cooper <u-boot at 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 _MVRTC_H_
+#define _MVRTC_H_
+
+#include <asm/arch/kirkwood.h>
+#include <compiler.h>
+
+/* RTC registers */
+struct mvrtc_registers {
+ u32 time;
+ u32 date;
+};
+
+/* time register */
+#define MVRTC_SEC_SFT 0
+#define MVRTC_SEC_MSK (0xf << MVRTC_SEC_SFT)
+#define MVRTC_10SEC_SFT 4
+#define MVRTC_10SEC_MSK (0x7 << MVRTC_10SEC_SFT)
+
+#define MVRTC_MIN_SFT 8
+#define MVRTC_MIN_MSK (0xf << MVRTC_MIN_SFT)
+#define MVRTC_10MIN_SFT 12
+#define MVRTC_10MIN_MSK (0x7 << MVRTC_10MIN_SFT)
+
+#define MVRTC_HOUR_SFT 16
+#define MVRTC_HOUR_MSK (0xf << MVRTC_HOUR_SFT)
+#define MVRTC_10HOUR_SFT 20
+#define MVRTC_10HOUR_MSK (0x3 << MVRTC_10HOUR_SFT)
+
+#define MVRTC_HRFMT_SFT 22
+#define MVRTC_HRFMT12_MSK (0x1 << MVRTC_HRFMT_SFT)
+#define MVRTC_HRFMT24_MSK (0x0 << MVRTC_HRFMT_SFT)
+
+#define MVRTC_DAY_SFT 24
+#define MVRTC_DAY_MSK (0x7 << MVRTC_DAY_SFT)
+
+/* date register */
+#define MVRTC_DATE_SFT 0
+#define MVRTC_DATE_MSK (0xf << MVRTC_DATE_SFT)
+#define MVRTC_10DATE_SFT 4
+#define MVRTC_10DATE_MSK (0x3 << MVRTC_10DATE_SFT)
+
+#define MVRTC_MON_SFT 8
+#define MVRTC_MON_MSK (0xf << MVRTC_MON_SFT)
+#define MVRTC_10MON_SFT 12
+#define MVRTC_10MON_MSK (0x1 << MVRTC_10MON_SFT)
+
+#define MVRTC_YEAR_SFT 16
+#define MVRTC_YEAR_MSK (0xf << MVRTC_YEAR_SFT)
+#define MVRTC_10YEAR_SFT 20
+#define MVRTC_10YEAR_MSK (0xf << MVRTC_10YEAR_SFT)
+
+#endif
--
1.7.0.4
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