arm: A320: driver for FTRTC010 real time clock

This patch adds an FTRTC010 driver for Faraday A320 evaluation board. Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>

arm: A320: driver for FTRTC010 real time clock
This patch adds an FTRTC010 driver for Faraday A320 evaluation board. Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
Po-Yu Chuang · Tom Rix
1 parent c1ee63cee8
Showing 2 changed files with 125 additions and 0 deletions Side-by-side Diff
drivers/rtc/Makefile
drivers/rtc/ftrtc010.c
@@ -40,6 +40,7 @@
 COBJS-$(CONFIG_RTC_DS164x) += ds164x.o
 COBJS-$(CONFIG_RTC_DS174x) += ds174x.o
 COBJS-$(CONFIG_RTC_DS3231) += ds3231.o
+COBJS-$(CONFIG_RTC_FTRTC010) += ftrtc010.o
 COBJS-$(CONFIG_RTC_ISL1208) += isl1208.o
 COBJS-$(CONFIG_RTC_M41T11) += m41t11.o
 COBJS-$(CONFIG_RTC_M41T60) += m41t60.o
+/*
+ * Faraday FTRTC010 Real Time Clock
+ *
+ * (C) Copyright 2009 Faraday Technology
+ * Po-Yu Chuang <ratbert@faraday-tech.com>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <rtc.h>
+#include <asm/io.h>
+
+struct ftrtc010 {
+	unsigned int sec;		/* 0x00 */
+	unsigned int min;		/* 0x04 */
+	unsigned int hour;		/* 0x08 */
+	unsigned int day;		/* 0x0c */
+	unsigned int alarm_sec;		/* 0x10 */
+	unsigned int alarm_min;		/* 0x14 */
+	unsigned int alarm_hour;	/* 0x18 */
+	unsigned int record;		/* 0x1c */
+	unsigned int cr;		/* 0x20 */
+};
+
+/*
+ * RTC Control Register
+ */
+#define FTRTC010_CR_ENABLE		(1 << 0)
+#define FTRTC010_CR_INTERRUPT_SEC	(1 << 1)	/* per second irq */
+#define FTRTC010_CR_INTERRUPT_MIN	(1 << 2)	/* per minute irq */
+#define FTRTC010_CR_INTERRUPT_HR	(1 << 3)	/* per hour   irq */
+#define FTRTC010_CR_INTERRUPT_DAY	(1 << 4)	/* per day    irq */
+
+static struct ftrtc010 *rtc = (struct ftrtc010 *)CONFIG_FTRTC010_BASE;
+
+static void ftrtc010_enable(void)
+{
+	writel(FTRTC010_CR_ENABLE, &rtc->cr);
+}
+
+/*
+ * return current time in seconds
+ */
+static unsigned long ftrtc010_time(void)
+{
+	unsigned long day;
+	unsigned long hour;
+	unsigned long minute;
+	unsigned long second;
+	unsigned long second2;
+
+	do {
+		second	= readl(&rtc->sec);
+		day	= readl(&rtc->day);
+		hour	= readl(&rtc->hour);
+		minute	= readl(&rtc->min);
+		second2	= readl(&rtc->sec);
+	} while (second != second2);
+
+	return day * 24 * 60 * 60 + hour * 60 * 60 + minute * 60 + second;
+}
+
+/*
+ * Get the current time from the RTC
+ */
+
+int rtc_get(struct rtc_time *tmp)
+{
+	unsigned long now;
+
+	debug("%s(): record register: %x\n",
+	      __func__, readl(&rtc->record));
+
+	now = ftrtc010_time() + readl(&rtc->record);
+
+	to_tm(now, tmp);
+
+	return 0;
+}
+
+/*
+ * Set the RTC
+ */
+int rtc_set(struct rtc_time *tmp)
+{
+	unsigned long new;
+	unsigned long now;
+
+	debug("%s(): DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+	      __func__,
+	      tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
+	      tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+	new = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_hour,
+		     tmp->tm_min, tmp->tm_sec);
+
+	now = ftrtc010_time();
+
+	debug("%s(): write %lx to record register\n", __func__, new - now);
+
+	writel(new - now, &rtc->record);
+
+	return 0;
+}
+
+void rtc_reset(void)
+{
+	debug("%s()\n", __func__);
+	ftrtc010_enable();
+}
...	...	@@ -40,6 +40,7 @@
40	40	COBJS-$(CONFIG_RTC_DS164x) += ds164x.o
41	41	COBJS-$(CONFIG_RTC_DS174x) += ds174x.o
42	42	COBJS-$(CONFIG_RTC_DS3231) += ds3231.o
	43	+COBJS-$(CONFIG_RTC_FTRTC010) += ftrtc010.o
43	44	COBJS-$(CONFIG_RTC_ISL1208) += isl1208.o
44	45	COBJS-$(CONFIG_RTC_M41T11) += m41t11.o
45	46	COBJS-$(CONFIG_RTC_M41T60) += m41t60.o
	1	+/*
	2	+ * Faraday FTRTC010 Real Time Clock
	3	+ *
	4	+ * (C) Copyright 2009 Faraday Technology
	5	+ * Po-Yu Chuang <ratbert@faraday-tech.com>
	6	+ *
	7	+ * This program is free software; you can redistribute it and/or modify
	8	+ * it under the terms of the GNU General Public License as published by
	9	+ * the Free Software Foundation; either version 2 of the License, or
	10	+ * (at your option) any later version.
	11	+ *
	12	+ * This program is distributed in the hope that it will be useful,
	13	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	+ * GNU General Public License for more details.
	16	+ *
	17	+ * You should have received a copy of the GNU General Public License
	18	+ * along with this program; if not, write to the Free Software
	19	+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	+ */
	21	+
	22	+#include <config.h>
	23	+#include <common.h>
	24	+#include <rtc.h>
	25	+#include <asm/io.h>
	26	+
	27	+struct ftrtc010 {
	28	+ unsigned int sec; /* 0x00 */
	29	+ unsigned int min; /* 0x04 */
	30	+ unsigned int hour; /* 0x08 */
	31	+ unsigned int day; /* 0x0c */
	32	+ unsigned int alarm_sec; /* 0x10 */
	33	+ unsigned int alarm_min; /* 0x14 */
	34	+ unsigned int alarm_hour; /* 0x18 */
	35	+ unsigned int record; /* 0x1c */
	36	+ unsigned int cr; /* 0x20 */
	37	+};
	38	+
	39	+/*
	40	+ * RTC Control Register
	41	+ */
	42	+#define FTRTC010_CR_ENABLE (1 << 0)
	43	+#define FTRTC010_CR_INTERRUPT_SEC (1 << 1) /* per second irq */
	44	+#define FTRTC010_CR_INTERRUPT_MIN (1 << 2) /* per minute irq */
	45	+#define FTRTC010_CR_INTERRUPT_HR (1 << 3) /* per hour irq */
	46	+#define FTRTC010_CR_INTERRUPT_DAY (1 << 4) /* per day irq */
	47	+
	48	+static struct ftrtc010 rtc = (struct ftrtc010 )CONFIG_FTRTC010_BASE;
	49	+
	50	+static void ftrtc010_enable(void)
	51	+{
	52	+ writel(FTRTC010_CR_ENABLE, &rtc->cr);
	53	+}
	54	+
	55	+/*
	56	+ * return current time in seconds
	57	+ */
	58	+static unsigned long ftrtc010_time(void)
	59	+{
	60	+ unsigned long day;
	61	+ unsigned long hour;
	62	+ unsigned long minute;
	63	+ unsigned long second;
	64	+ unsigned long second2;
	65	+
	66	+ do {
	67	+ second = readl(&rtc->sec);
	68	+ day = readl(&rtc->day);
	69	+ hour = readl(&rtc->hour);
	70	+ minute = readl(&rtc->min);
	71	+ second2 = readl(&rtc->sec);
	72	+ } while (second != second2);
	73	+
	74	+ return day * 24 * 60 * 60 + hour * 60 * 60 + minute * 60 + second;
	75	+}
	76	+
	77	+/*
	78	+ * Get the current time from the RTC
	79	+ */
	80	+
	81	+int rtc_get(struct rtc_time *tmp)
	82	+{
	83	+ unsigned long now;
	84	+
	85	+ debug("%s(): record register: %x\n",
	86	+ __func__, readl(&rtc->record));
	87	+
	88	+ now = ftrtc010_time() + readl(&rtc->record);
	89	+
	90	+ to_tm(now, tmp);
	91	+
	92	+ return 0;
	93	+}
	94	+
	95	+/*
	96	+ * Set the RTC
	97	+ */
	98	+int rtc_set(struct rtc_time *tmp)
	99	+{
	100	+ unsigned long new;
	101	+ unsigned long now;
	102	+
	103	+ debug("%s(): DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	104	+ __func__,
	105	+ tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	106	+ tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	107	+
	108	+ new = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_hour,
	109	+ tmp->tm_min, tmp->tm_sec);
	110	+
	111	+ now = ftrtc010_time();
	112	+
	113	+ debug("%s(): write %lx to record register\n", __func__, new - now);
	114	+
	115	+ writel(new - now, &rtc->record);
	116	+
	117	+ return 0;
	118	+}
	119	+
	120	+void rtc_reset(void)
	121	+{
	122	+ debug("%s()\n", __func__);
	123	+ ftrtc010_enable();
	124	+}