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-rw-r--r--arch/sparc64/Kconfig1
-rw-r--r--arch/sparc64/kernel/time.c293
2 files changed, 9 insertions, 285 deletions
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 16149ce8a416..4a90809b40fb 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -24,6 +24,7 @@ config SPARC64
select RTC_DRV_CMOS
select RTC_DRV_BQ4802
select RTC_DRV_SUN4V
+ select RTC_DRV_STARFIRE
config GENERIC_TIME
bool
diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index 15d16dbca1db..ea05038a8c16 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -403,27 +403,6 @@ int update_persistent_clock(struct timespec now)
return -1;
}
-/* davem suggests we keep this within the 4M locked kernel image */
-static u32 starfire_get_time(void)
-{
- static char obp_gettod[32];
- static u32 unix_tod;
-
- sprintf(obp_gettod, "h# %08x unix-gettod",
- (unsigned int) (long) &unix_tod);
- prom_feval(obp_gettod);
-
- return unix_tod;
-}
-
-static int starfire_set_time(u32 val)
-{
- /* Do nothing, time is set using the service processor
- * console on this platform.
- */
- return 0;
-}
-
unsigned long cmos_regs;
EXPORT_SYMBOL(cmos_regs);
@@ -607,15 +586,16 @@ static struct platform_device rtc_sun4v_device = {
.id = -1,
};
+static struct platform_device rtc_starfire_device = {
+ .name = "rtc-starfire",
+ .id = -1,
+};
+
static int __init clock_init(void)
{
- if (this_is_starfire) {
- xtime.tv_sec = starfire_get_time();
- xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
- set_normalized_timespec(&wall_to_monotonic,
- -xtime.tv_sec, -xtime.tv_nsec);
- return 0;
- }
+ if (this_is_starfire)
+ return platform_device_register(&rtc_starfire_device);
+
if (tlb_type == hypervisor)
return platform_device_register(&rtc_sun4v_device);
@@ -892,265 +872,8 @@ unsigned long long sched_clock(void)
>> SPARC64_NSEC_PER_CYC_SHIFT;
}
-#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
-static unsigned char mini_rtc_status; /* bitmapped status byte. */
-
-#define FEBRUARY 2
-#define STARTOFTIME 1970
-#define SECDAY 86400L
-#define SECYR (SECDAY * 365)
-#define leapyear(year) ((year) % 4 == 0 && \
- ((year) % 100 != 0 || (year) % 400 == 0))
-#define days_in_year(a) (leapyear(a) ? 366 : 365)
-#define days_in_month(a) (month_days[(a) - 1])
-
-static int month_days[12] = {
- 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
-};
-
-/*
- * This only works for the Gregorian calendar - i.e. after 1752 (in the UK)
- */
-static void GregorianDay(struct rtc_time * tm)
-{
- int leapsToDate;
- int lastYear;
- int day;
- int MonthOffset[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
-
- lastYear = tm->tm_year - 1;
-
- /*
- * Number of leap corrections to apply up to end of last year
- */
- leapsToDate = lastYear / 4 - lastYear / 100 + lastYear / 400;
-
- /*
- * This year is a leap year if it is divisible by 4 except when it is
- * divisible by 100 unless it is divisible by 400
- *
- * e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 was
- */
- day = tm->tm_mon > 2 && leapyear(tm->tm_year);
-
- day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] +
- tm->tm_mday;
-
- tm->tm_wday = day % 7;
-}
-
-static void to_tm(int tim, struct rtc_time *tm)
-{
- register int i;
- register long hms, day;
-
- day = tim / SECDAY;
- hms = tim % SECDAY;
-
- /* Hours, minutes, seconds are easy */
- tm->tm_hour = hms / 3600;
- tm->tm_min = (hms % 3600) / 60;
- tm->tm_sec = (hms % 3600) % 60;
-
- /* Number of years in days */
- for (i = STARTOFTIME; day >= days_in_year(i); i++)
- day -= days_in_year(i);
- tm->tm_year = i;
-
- /* Number of months in days left */
- if (leapyear(tm->tm_year))
- days_in_month(FEBRUARY) = 29;
- for (i = 1; day >= days_in_month(i); i++)
- day -= days_in_month(i);
- days_in_month(FEBRUARY) = 28;
- tm->tm_mon = i;
-
- /* Days are what is left over (+1) from all that. */
- tm->tm_mday = day + 1;
-
- /*
- * Determine the day of week
- */
- GregorianDay(tm);
-}
-
-/* Both Starfire and SUN4V give us seconds since Jan 1st, 1970,
- * aka Unix time. So we have to convert to/from rtc_time.
- */
-static void starfire_get_rtc_time(struct rtc_time *time)
-{
- u32 seconds = starfire_get_time();
-
- to_tm(seconds, time);
- time->tm_year -= 1900;
- time->tm_mon -= 1;
-}
-
-static int starfire_set_rtc_time(struct rtc_time *time)
-{
- u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1,
- time->tm_mday, time->tm_hour,
- time->tm_min, time->tm_sec);
-
- return starfire_set_time(seconds);
-}
-
-struct mini_rtc_ops {
- void (*get_rtc_time)(struct rtc_time *);
- int (*set_rtc_time)(struct rtc_time *);
-};
-
-static struct mini_rtc_ops starfire_rtc_ops = {
- .get_rtc_time = starfire_get_rtc_time,
- .set_rtc_time = starfire_set_rtc_time,
-};
-
-static struct mini_rtc_ops *mini_rtc_ops;
-
-static inline void mini_get_rtc_time(struct rtc_time *time)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&rtc_lock, flags);
- mini_rtc_ops->get_rtc_time(time);
- spin_unlock_irqrestore(&rtc_lock, flags);
-}
-
-static inline int mini_set_rtc_time(struct rtc_time *time)
-{
- unsigned long flags;
- int err;
-
- spin_lock_irqsave(&rtc_lock, flags);
- err = mini_rtc_ops->set_rtc_time(time);
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- return err;
-}
-
-static int mini_rtc_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct rtc_time wtime;
- void __user *argp = (void __user *)arg;
-
- switch (cmd) {
-
- case RTC_PLL_GET:
- return -EINVAL;
-
- case RTC_PLL_SET:
- return -EINVAL;
-
- case RTC_UIE_OFF: /* disable ints from RTC updates. */
- return 0;
-
- case RTC_UIE_ON: /* enable ints for RTC updates. */
- return -EINVAL;
-
- case RTC_RD_TIME: /* Read the time/date from RTC */
- /* this doesn't get week-day, who cares */
- memset(&wtime, 0, sizeof(wtime));
- mini_get_rtc_time(&wtime);
-
- return copy_to_user(argp, &wtime, sizeof(wtime)) ? -EFAULT : 0;
-
- case RTC_SET_TIME: /* Set the RTC */
- {
- int year, days;
-
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
-
- if (copy_from_user(&wtime, argp, sizeof(wtime)))
- return -EFAULT;
-
- year = wtime.tm_year + 1900;
- days = month_days[wtime.tm_mon] +
- ((wtime.tm_mon == 1) && leapyear(year));
-
- if ((wtime.tm_mon < 0 || wtime.tm_mon > 11) ||
- (wtime.tm_mday < 1))
- return -EINVAL;
-
- if (wtime.tm_mday < 0 || wtime.tm_mday > days)
- return -EINVAL;
-
- if (wtime.tm_hour < 0 || wtime.tm_hour >= 24 ||
- wtime.tm_min < 0 || wtime.tm_min >= 60 ||
- wtime.tm_sec < 0 || wtime.tm_sec >= 60)
- return -EINVAL;
-
- return mini_set_rtc_time(&wtime);
- }
- }
-
- return -EINVAL;
-}
-
-static int mini_rtc_open(struct inode *inode, struct file *file)
-{
- lock_kernel();
- if (mini_rtc_status & RTC_IS_OPEN) {
- unlock_kernel();
- return -EBUSY;
- }
-
- mini_rtc_status |= RTC_IS_OPEN;
- unlock_kernel();
-
- return 0;
-}
-
-static int mini_rtc_release(struct inode *inode, struct file *file)
-{
- mini_rtc_status &= ~RTC_IS_OPEN;
- return 0;
-}
-
-
-static const struct file_operations mini_rtc_fops = {
- .owner = THIS_MODULE,
- .ioctl = mini_rtc_ioctl,
- .open = mini_rtc_open,
- .release = mini_rtc_release,
-};
-
-static struct miscdevice rtc_mini_dev =
-{
- .minor = RTC_MINOR,
- .name = "rtc",
- .fops = &mini_rtc_fops,
-};
-
-static int __init rtc_mini_init(void)
-{
- int retval;
-
- if (this_is_starfire)
- mini_rtc_ops = &starfire_rtc_ops;
- else
- return -ENODEV;
-
- printk(KERN_INFO "Mini RTC Driver\n");
-
- retval = misc_register(&rtc_mini_dev);
- if (retval < 0)
- return retval;
-
- return 0;
-}
-
-static void __exit rtc_mini_exit(void)
-{
- misc_deregister(&rtc_mini_dev);
-}
-
int __devinit read_current_timer(unsigned long *timer_val)
{
*timer_val = tick_ops->get_tick();
return 0;
}
-
-module_init(rtc_mini_init);
-module_exit(rtc_mini_exit);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.