Initial revision

1 files changed, 207 insertions, 0 deletions

diff --git a/rtc/mk48t59.c b/rtc/mk48t59.c
new file mode 100644
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+/*
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.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
+ */
+
+/*
+ * Date & Time support for the MK48T59 RTC
+ */
+
+#undef	RTC_DEBUG
+
+#include <common.h>
+#include <command.h>
+#include <config.h>
+#include <rtc.h>
+#include <mk48t59.h>
+
+#if defined(CONFIG_RTC_MK48T59)
+
+#if defined(CONFIG_BAB7xx)
+
+static uchar rtc_read (short reg)
+{
+	out8(RTC_PORT_ADDR0, reg & 0xFF);
+	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
+	return in8(RTC_PORT_DATA);
+}
+
+static void rtc_write (short reg, uchar val)
+{
+	out8(RTC_PORT_ADDR0, reg & 0xFF);
+	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
+	out8(RTC_PORT_DATA, val);
+}
+
+#elif defined(CONFIG_PCIPPC2)
+
+#include "../board/pcippc2/pcippc2.h"
+
+static uchar rtc_read (short reg)
+{
+	return in8(RTC(reg));
+}
+
+static void rtc_write (short reg, uchar val)
+{
+	out8(RTC(reg),val);
+}
+
+#else
+# error Board specific rtc access functions should be supplied
+#endif
+
+static unsigned bcd2bin (uchar n)
+{
+	return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F));
+}
+
+static unsigned char bin2bcd (unsigned int n)
+{
+	return (((n / 10) << 4) | (n % 10));
+}
+
+/* ------------------------------------------------------------------------- */
+
+void *nvram_read(void *dest, const short src, size_t count)
+{
+	uchar *d = (uchar *) dest;
+	short s = src;
+
+	while (count--)
+		*d++ = rtc_read(s++);
+
+	return dest;
+}
+
+void nvram_write(short dest, const void *src, size_t count)
+{
+	short d = dest;
+	uchar *s = (uchar *) src;
+
+	while (count--)
+		rtc_write(d++, *s++);
+}
+
+#if (CONFIG_COMMANDS & CFG_CMD_DATE)
+
+/* ------------------------------------------------------------------------- */
+
+void rtc_get (struct rtc_time *tmp)
+{
+	uchar save_ctrl_a;
+	uchar sec, min, hour, mday, wday, mon, year;
+
+	/* Simple: freeze the clock, read it and allow updates again */
+	save_ctrl_a = rtc_read(RTC_CONTROLA);
+
+	/* Set the register to read the value. */
+	save_ctrl_a |= RTC_CA_READ;
+	rtc_write(RTC_CONTROLA, save_ctrl_a);
+
+	sec		= rtc_read (RTC_SECONDS);
+	min		= rtc_read (RTC_MINUTES);
+	hour	= rtc_read (RTC_HOURS);
+	mday	= rtc_read (RTC_DAY_OF_MONTH);
+	wday	= rtc_read (RTC_DAY_OF_WEEK);
+	mon		= rtc_read (RTC_MONTH);
+	year	= rtc_read (RTC_YEAR);
+
+	/* re-enable update */
+	save_ctrl_a &= ~RTC_CA_READ;
+	rtc_write(RTC_CONTROLA, save_ctrl_a);
+
+#ifdef RTC_DEBUG
+	printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
+		"hr: %02x min: %02x sec: %02x\n",
+		year, mon, mday, wday,
+		hour, min, sec );
+#endif
+	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 & 0x1F);
+	tmp->tm_year = bcd2bin (year);
+	tmp->tm_wday = bcd2bin (wday & 0x07);
+	if(tmp->tm_year<70)
+		tmp->tm_year+=2000;
+	else
+		tmp->tm_year+=1900;
+	tmp->tm_yday = 0;
+	tmp->tm_isdst= 0;
+#ifdef RTC_DEBUG
+	printf ( "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);
+#endif
+}
+
+void rtc_set (struct rtc_time *tmp)
+{
+	uchar save_ctrl_a;
+
+#ifdef RTC_DEBUG
+	printf ( "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);
+#endif
+	save_ctrl_a = rtc_read(RTC_CONTROLA);
+
+	save_ctrl_a |= RTC_CA_WRITE;
+	rtc_write(RTC_CONTROLA, save_ctrl_a); /* disables the RTC to update the regs */
+
+	rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
+	rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
+
+	rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
+	rtc_write (RTC_DAY_OF_MONTH, bin2bcd(tmp->tm_mday));
+	rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
+	rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
+	rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));
+
+	save_ctrl_a &= ~RTC_CA_WRITE;
+	rtc_write(RTC_CONTROLA, save_ctrl_a); /* enables the RTC to update the regs */
+}
+
+void rtc_reset (void)
+{
+	uchar control_b;
+
+	/*
+	 * Start oscillator here.
+	 */
+	control_b = rtc_read(RTC_CONTROLB);
+
+	control_b &= ~RTC_CB_STOP;
+	rtc_write(RTC_CONTROLB, control_b);
+}
+
+void rtc_set_watchdog(short multi, short res)
+{
+	uchar wd_value;
+
+	wd_value = RTC_WDS | ((multi & 0x1F) << 2) | (res & 0x3);
+	rtc_write(RTC_WATCHDOG, wd_value);
+}
+
+#endif	/* (CONFIG_COMMANDS & CFG_CMD_DATE) */
+#endif	/* CONFIG_RTC_MK48T59 */