linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / arm / common / rtctime.c

diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
index 4e5445c..e851d86 100644 (file)
--- a/arch/arm/common/rtctime.c
+++ b/arch/arm/common/rtctime.c
@@ -20,7 +20,6 @@
 #include <linux/capability.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
-#include <linux/rtc.h>
 
 #include <asm/rtc.h>
 #include <asm/semaphore.h>
@@ -43,6 +42,89 @@ static struct rtc_ops *rtc_ops;
 
 #define rtc_epoch 1900UL
 
+static const unsigned char days_in_month[] = {
+       31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+};
+
+#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
+#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400))
+
+static int month_days(unsigned int month, unsigned int year)
+{
+       return days_in_month[month] + (LEAP_YEAR(year) && month == 1);
+}
+
+/*
+ * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
+ */
+void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
+{
+       int days, month, year;
+
+       days = time / 86400;
+       time -= days * 86400;
+
+       tm->tm_wday = (days + 4) % 7;
+
+       year = 1970 + days / 365;
+       days -= (year - 1970) * 365
+               + LEAPS_THRU_END_OF(year - 1)
+               - LEAPS_THRU_END_OF(1970 - 1);
+       if (days < 0) {
+               year -= 1;
+               days += 365 + LEAP_YEAR(year);
+       }
+       tm->tm_year = year - 1900;
+       tm->tm_yday = days + 1;
+
+       for (month = 0; month < 11; month++) {
+               int newdays;
+
+               newdays = days - month_days(month, year);
+               if (newdays < 0)
+                       break;
+               days = newdays;
+       }
+       tm->tm_mon = month;
+       tm->tm_mday = days + 1;
+
+       tm->tm_hour = time / 3600;
+       time -= tm->tm_hour * 3600;
+       tm->tm_min = time / 60;
+       tm->tm_sec = time - tm->tm_min * 60;
+}
+EXPORT_SYMBOL(rtc_time_to_tm);
+
+/*
+ * Does the rtc_time represent a valid date/time?
+ */
+int rtc_valid_tm(struct rtc_time *tm)
+{
+       if (tm->tm_year < 70 ||
+           tm->tm_mon >= 12 ||
+           tm->tm_mday < 1 ||
+           tm->tm_mday > month_days(tm->tm_mon, tm->tm_year + 1900) ||
+           tm->tm_hour >= 24 ||
+           tm->tm_min >= 60 ||
+           tm->tm_sec >= 60)
+               return -EINVAL;
+
+       return 0;
+}
+EXPORT_SYMBOL(rtc_valid_tm);
+
+/*
+ * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
+ */
+int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
+{
+       *time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+                      tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+       return 0;
+}
+EXPORT_SYMBOL(rtc_tm_to_time);
+
 /*
  * Calculate the next alarm time given the requested alarm time mask
  * and the current time.
@@ -68,15 +150,14 @@ void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc
                rtc_time_to_tm(next_time, next);
        }
 }
-EXPORT_SYMBOL(rtc_next_alarm_time);
 
-static inline int rtc_arm_read_time(struct rtc_ops *ops, struct rtc_time *tm)
+static inline int rtc_read_time(struct rtc_ops *ops, struct rtc_time *tm)
 {
        memset(tm, 0, sizeof(struct rtc_time));
        return ops->read_time(tm);
 }
 
-static inline int rtc_arm_set_time(struct rtc_ops *ops, struct rtc_time *tm)
+static inline int rtc_set_time(struct rtc_ops *ops, struct rtc_time *tm)
 {
        int ret;
 
@@ -87,7 +168,7 @@ static inline int rtc_arm_set_time(struct rtc_ops *ops, struct rtc_time *tm)
        return ret;
 }
 
-static inline int rtc_arm_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
+static inline int rtc_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
 {
        int ret = -EINVAL;
        if (ops->read_alarm) {
@@ -97,7 +178,7 @@ static inline int rtc_arm_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alr
        return ret;
 }
 
-static inline int rtc_arm_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
+static inline int rtc_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
 {
        int ret = -EINVAL;
        if (ops->set_alarm)
@@ -185,7 +266,7 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
        switch (cmd) {
        case RTC_ALM_READ:
-               ret = rtc_arm_read_alarm(ops, &alrm);
+               ret = rtc_read_alarm(ops, &alrm);
                if (ret)
                        break;
                ret = copy_to_user(uarg, &alrm.time, sizeof(tm));
@@ -207,11 +288,11 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                alrm.time.tm_wday = -1;
                alrm.time.tm_yday = -1;
                alrm.time.tm_isdst = -1;
-               ret = rtc_arm_set_alarm(ops, &alrm);
+               ret = rtc_set_alarm(ops, &alrm);
                break;
 
        case RTC_RD_TIME:
-               ret = rtc_arm_read_time(ops, &tm);
+               ret = rtc_read_time(ops, &tm);
                if (ret)
                        break;
                ret = copy_to_user(uarg, &tm, sizeof(tm));
@@ -229,7 +310,7 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                        ret = -EFAULT;
                        break;
                }
-               ret = rtc_arm_set_time(ops, &tm);
+               ret = rtc_set_time(ops, &tm);
                break;
 
        case RTC_EPOCH_SET:
@@ -260,11 +341,11 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                        ret = -EFAULT;
                        break;
                }
-               ret = rtc_arm_set_alarm(ops, &alrm);
+               ret = rtc_set_alarm(ops, &alrm);
                break;
 
        case RTC_WKALM_RD:
-               ret = rtc_arm_read_alarm(ops, &alrm);
+               ret = rtc_read_alarm(ops, &alrm);
                if (ret)
                        break;
                ret = copy_to_user(uarg, &alrm, sizeof(alrm));
@@ -354,7 +435,7 @@ static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eo
        struct rtc_time tm;
        char *p = page;
 
-       if (rtc_arm_read_time(ops, &tm) == 0) {
+       if (rtc_read_time(ops, &tm) == 0) {
                p += sprintf(p,
                        "rtc_time\t: %02d:%02d:%02d\n"
                        "rtc_date\t: %04d-%02d-%02d\n"
@@ -364,7 +445,7 @@ static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eo
                        rtc_epoch);
        }
 
-       if (rtc_arm_read_alarm(ops, &alrm) == 0) {
+       if (rtc_read_alarm(ops, &alrm) == 0) {
                p += sprintf(p, "alrm_time\t: ");
                if ((unsigned int)alrm.time.tm_hour <= 24)
                        p += sprintf(p, "%02d:", alrm.time.tm_hour);