kirkwood: define empty CONFIG_MVGBE_PORTS by default

[karo-tx-uboot.git] / drivers / rtc / mc146818.c

diff --git a/drivers/rtc/mc146818.c b/drivers/rtc/mc146818.c
index d68b438efbc584209b61daffa12c69583697abd9..39e6041be365ccdb9089d21ee302c9de76d429cf 100644 (file)
--- a/drivers/rtc/mc146818.c
+++ b/drivers/rtc/mc146818.c
@@ -2,23 +2,7 @@
  * (C) Copyright 2001
  * Denis Peter MPL AG Switzerland. d.peter@mpl.ch
  *
- * 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
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 /*
@@ -30,9 +14,19 @@
 #include <common.h>
 #include <command.h>
 #include <rtc.h>
+#include <version.h>
+
+#if defined(__I386__) || defined(CONFIG_MALTA)
+#include <asm/io.h>
+#define in8(p) inb(p)
+#define out8(p, v) outb(v, p)
+#endif
 
 #if defined(CONFIG_CMD_DATE)
 
+/* Set this to 1 to clear the CMOS RAM */
+#define CLEAR_CMOS 0
+
 static uchar rtc_read  (uchar reg);
 static void  rtc_write (uchar reg, uchar val);
 
@@ -51,7 +45,14 @@ static void  rtc_write (uchar reg, uchar val);
 #define RTC_CONFIG_B           0x0B
 #define RTC_CONFIG_C           0x0C
 #define RTC_CONFIG_D           0x0D
+#define RTC_REG_SIZE           0x80
+
+#define RTC_CONFIG_A_REF_CLCK_32KHZ    (1 << 5)
+#define RTC_CONFIG_A_RATE_1024HZ       6
+
+#define RTC_CONFIG_B_24H               (1 << 1)
 
+#define RTC_CONFIG_D_VALID_RAM_AND_TIME        0x80
 
 /* ------------------------------------------------------------------------- */
 
@@ -67,9 +68,6 @@ int rtc_get (struct rtc_time *tmp)
        wday    = rtc_read (RTC_DAY_OF_WEEK);
        mon     = rtc_read (RTC_MONTH);
        year    = rtc_read (RTC_YEAR);
-#ifdef CONFIG_AMIGAONEG3SE
-       wday -= 1; /* VIA 686 stores Sunday = 1, Monday = 2, ... */
-#endif
 #ifdef RTC_DEBUG
        printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
                "hr: %02x min: %02x sec: %02x\n",
@@ -114,11 +112,7 @@ int rtc_set (struct rtc_time *tmp)
 
        rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
        rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
-#ifdef CONFIG_AMIGAONEG3SE
-       rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday)+1);
-#else
        rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
-#endif
        rtc_write (RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday));
        rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
        rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
@@ -145,25 +139,49 @@ void rtc_reset (void)
  */
 static uchar rtc_read (uchar reg)
 {
-       return(in8(CONFIG_SYS_RTC_REG_BASE_ADDR+reg));
+       return in8(CONFIG_SYS_RTC_REG_BASE_ADDR + reg);
 }
 
 static void rtc_write (uchar reg, uchar val)
 {
-       out8(CONFIG_SYS_RTC_REG_BASE_ADDR+reg, val);
+       out8(CONFIG_SYS_RTC_REG_BASE_ADDR + reg, val);
 }
 #else
 static uchar rtc_read (uchar reg)
 {
        out8(RTC_PORT_MC146818,reg);
-       return(in8(RTC_PORT_MC146818+1));
+       return in8(RTC_PORT_MC146818 + 1);
 }
 
 static void rtc_write (uchar reg, uchar val)
 {
        out8(RTC_PORT_MC146818,reg);
-       out8(RTC_PORT_MC146818+1,val);
+       out8(RTC_PORT_MC146818+1, val);
 }
 #endif
 
+void rtc_init(void)
+{
+#if CLEAR_CMOS
+       int i;
+
+       rtc_write(RTC_SECONDS_ALARM, 0);
+       rtc_write(RTC_MINUTES_ALARM, 0);
+       rtc_write(RTC_HOURS_ALARM, 0);
+       for (i = RTC_CONFIG_A; i < RTC_REG_SIZE; i++)
+               rtc_write(i, 0);
+       printf("RTC: zeroing CMOS RAM\n");
+#endif
+
+       /* Setup the real time clock */
+       rtc_write(RTC_CONFIG_B, RTC_CONFIG_B_24H);
+       /* Setup the frequency it operates at */
+       rtc_write(RTC_CONFIG_A, RTC_CONFIG_A_REF_CLCK_32KHZ |
+                 RTC_CONFIG_A_RATE_1024HZ);
+       /* Ensure all reserved bits are 0 in register D */
+       rtc_write(RTC_CONFIG_D, RTC_CONFIG_D_VALID_RAM_AND_TIME);
+
+       /* Clear any pending interrupts */
+       rtc_read(RTC_CONFIG_C);
+}
 #endif