1 files changed, 131 insertions, 0 deletions

diff --git a/include/asm-parisc/rtc.h b/include/asm-parisc/rtc.h
new file mode 100644
index 000000000000..f3d3d6b110ba
--- /dev/null
+++ b/include/asm-parisc/rtc.h
@@ -0,0 +1,131 @@
+/* 
+ * inclue/asm-parisc/rtc.h
+ *
+ * Copyright 2002 Randolph CHung <tausq@debian.org>
+ *
+ * Based on: include/asm-ppc/rtc.h and the genrtc driver in the
+ * 2.4 parisc linux tree
+ */
+
+#ifndef __ASM_RTC_H__
+#define __ASM_RTC_H__
+
+#ifdef __KERNEL__
+
+#include <linux/rtc.h>
+
+#include <asm/pdc.h>
+
+#define SECS_PER_HOUR   (60 * 60)
+#define SECS_PER_DAY    (SECS_PER_HOUR * 24)
+
+
+#define RTC_PIE 0x40            /* periodic interrupt enable */
+#define RTC_AIE 0x20            /* alarm interrupt enable */
+#define RTC_UIE 0x10            /* update-finished interrupt enable */
+
+#define RTC_BATT_BAD 0x100      /* battery bad */
+
+/* some dummy definitions */
+#define RTC_SQWE 0x08           /* enable square-wave output */
+#define RTC_DM_BINARY 0x04      /* all time/date values are BCD if clear */
+#define RTC_24H 0x02            /* 24 hour mode - else hours bit 7 means pm */
+#define RTC_DST_EN 0x01         /* auto switch DST - works f. USA only */
+
+# define __isleap(year) \
+  ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+
+/* How many days come before each month (0-12).  */
+static const unsigned short int __mon_yday[2][13] =
+{
+        /* Normal years.  */
+        { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+        /* Leap years.  */
+        { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+};
+
+static inline unsigned int get_rtc_time(struct rtc_time *wtime)
+{
+        struct pdc_tod tod_data;
+        long int days, rem, y;
+        const unsigned short int *ip;
+
+        if(pdc_tod_read(&tod_data) < 0)
+                return RTC_24H | RTC_BATT_BAD;
+
+
+        // most of the remainder of this function is:
+//      Copyright (C) 1991, 1993, 1997, 1998 Free Software Foundation, Inc.
+//      This was originally a part of the GNU C Library.
+//      It is distributed under the GPL, and was swiped from offtime.c
+
+
+        days = tod_data.tod_sec / SECS_PER_DAY;
+        rem = tod_data.tod_sec % SECS_PER_DAY;
+
+        wtime->tm_hour = rem / SECS_PER_HOUR;
+        rem %= SECS_PER_HOUR;
+        wtime->tm_min = rem / 60;
+        wtime->tm_sec = rem % 60;
+
+        y = 1970;
+
+#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
+#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
+
+        while (days < 0 || days >= (__isleap (y) ? 366 : 365))
+        {
+                /* Guess a corrected year, assuming 365 days per year.  */
+                long int yg = y + days / 365 - (days % 365 < 0);
+
+                /* Adjust DAYS and Y to match the guessed year.  */
+                days -= ((yg - y) * 365
+                         + LEAPS_THRU_END_OF (yg - 1)
+                         - LEAPS_THRU_END_OF (y - 1));
+                y = yg;
+        }
+        wtime->tm_year = y - 1900;
+
+        ip = __mon_yday[__isleap(y)];
+        for (y = 11; days < (long int) ip[y]; --y)
+                continue;
+        days -= ip[y];
+        wtime->tm_mon = y;
+        wtime->tm_mday = days + 1;
+
+        return RTC_24H;
+}
+
+static int set_rtc_time(struct rtc_time *wtime)
+{
+        u_int32_t secs;
+
+        secs = mktime(wtime->tm_year + 1900, wtime->tm_mon + 1, wtime->tm_mday, 
+                      wtime->tm_hour, wtime->tm_min, wtime->tm_sec);
+
+        if(pdc_tod_set(secs, 0) < 0)
+                return -1;
+        else
+                return 0;
+
+}
+
+static inline unsigned int get_rtc_ss(void)
+{
+        struct rtc_time h;
+
+        get_rtc_time(&h);
+        return h.tm_sec;
+}
+
+static inline int get_rtc_pll(struct rtc_pll_info *pll)
+{
+        return -EINVAL;
+}
+static inline int set_rtc_pll(struct rtc_pll_info *pll)
+{
+        return -EINVAL;
+}
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_RTC_H__ */