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authorKyle McMartin <kyle@mcmartin.ca>2008-07-29 05:02:13 +0200
committerKyle McMartin <kyle@hera.kernel.org>2008-10-10 18:32:29 +0200
commitdeae26bf6a10e47983606f5df080b91e97650ead (patch)
tree84a8a68145d0f713d7c5a1f9e6b3b03be9b3a4c8 /arch/parisc/include/asm/rtc.h
parentparisc: move pdc_result to real2.S (diff)
downloadlinux-deae26bf6a10e47983606f5df080b91e97650ead.tar.xz
linux-deae26bf6a10e47983606f5df080b91e97650ead.zip
parisc: move include/asm-parisc to arch/parisc/include/asm
Diffstat (limited to 'arch/parisc/include/asm/rtc.h')
-rw-r--r--arch/parisc/include/asm/rtc.h131
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/rtc.h b/arch/parisc/include/asm/rtc.h
new file mode 100644
index 000000000000..099d641a42c2
--- /dev/null
+++ b/arch/parisc/include/asm/rtc.h
@@ -0,0 +1,131 @@
+/*
+ * include/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;
+
+ memset(wtime, 0, sizeof(*wtime));
+ 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__ */