[RFC PATCH 09/14] efi: move functions of access efi time to header file for sharing
From: Lee, Chun-Yi
Date: Thu Dec 19 2013 - 02:54:46 EST
There have some functions, e.g. compute_yday, compute_wday, convert efi
time... are duplicated in efirtc, rtc-efi and will also used in rtc.c.
So this patch moved those functions of access efi time to efi.h header
file for sharing.
Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxx>
---
drivers/char/efirtc.c | 98 ------------------------------------
drivers/rtc/rtc-efi.c | 133 ++----------------------------------------------
include/linux/efi.h | 134 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 140 insertions(+), 225 deletions(-)
diff --git a/drivers/char/efirtc.c b/drivers/char/efirtc.c
index e39e740..8a30a02 100644
--- a/drivers/char/efirtc.c
+++ b/drivers/char/efirtc.c
@@ -41,109 +41,11 @@
#define EFI_RTC_VERSION "0.4"
-#define EFI_ISDST (EFI_TIME_ADJUST_DAYLIGHT|EFI_TIME_IN_DAYLIGHT)
-/*
- * EFI Epoch is 1/1/1998
- */
-#define EFI_RTC_EPOCH 1998
-
static DEFINE_SPINLOCK(efi_rtc_lock);
static long efi_rtc_ioctl(struct file *file, unsigned int cmd,
unsigned long arg);
-#define is_leap(year) \
- ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
-
-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 }
-};
-
-/*
- * returns day of the year [0-365]
- */
-static inline int
-compute_yday(efi_time_t *eft)
-{
- /* efi_time_t.month is in the [1-12] so, we need -1 */
- return __mon_yday[is_leap(eft->year)][eft->month-1]+ eft->day -1;
-}
-/*
- * returns day of the week [0-6] 0=Sunday
- *
- * Don't try to provide a year that's before 1998, please !
- */
-static int
-compute_wday(efi_time_t *eft)
-{
- int y;
- int ndays = 0;
-
- if ( eft->year < 1998 ) {
- printk(KERN_ERR "efirtc: EFI year < 1998, invalid date\n");
- return -1;
- }
-
- for(y=EFI_RTC_EPOCH; y < eft->year; y++ ) {
- ndays += 365 + (is_leap(y) ? 1 : 0);
- }
- ndays += compute_yday(eft);
-
- /*
- * 4=1/1/1998 was a Thursday
- */
- return (ndays + 4) % 7;
-}
-
-static void
-convert_to_efi_time(struct rtc_time *wtime, efi_time_t *eft)
-{
-
- eft->year = wtime->tm_year + 1900;
- eft->month = wtime->tm_mon + 1;
- eft->day = wtime->tm_mday;
- eft->hour = wtime->tm_hour;
- eft->minute = wtime->tm_min;
- eft->second = wtime->tm_sec;
- eft->nanosecond = 0;
- eft->daylight = wtime->tm_isdst ? EFI_ISDST: 0;
- eft->timezone = EFI_UNSPECIFIED_TIMEZONE;
-}
-
-static void
-convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime)
-{
- memset(wtime, 0, sizeof(*wtime));
- wtime->tm_sec = eft->second;
- wtime->tm_min = eft->minute;
- wtime->tm_hour = eft->hour;
- wtime->tm_mday = eft->day;
- wtime->tm_mon = eft->month - 1;
- wtime->tm_year = eft->year - 1900;
-
- /* day of the week [0-6], Sunday=0 */
- wtime->tm_wday = compute_wday(eft);
-
- /* day in the year [1-365]*/
- wtime->tm_yday = compute_yday(eft);
-
-
- switch (eft->daylight & EFI_ISDST) {
- case EFI_ISDST:
- wtime->tm_isdst = 1;
- break;
- case EFI_TIME_ADJUST_DAYLIGHT:
- wtime->tm_isdst = 0;
- break;
- default:
- wtime->tm_isdst = -1;
- }
-}
-
static long efi_rtc_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 693ea47..4687022 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -22,95 +22,6 @@
#include <linux/rtc.h>
#include <linux/efi.h>
-#define EFI_ISDST (EFI_TIME_ADJUST_DAYLIGHT|EFI_TIME_IN_DAYLIGHT)
-/*
- * EFI Epoch is 1/1/1998
- */
-#define EFI_RTC_EPOCH 1998
-
-/*
- * returns day of the year [0-365]
- */
-static inline int
-compute_yday(efi_time_t *eft)
-{
- /* efi_time_t.month is in the [1-12] so, we need -1 */
- return rtc_year_days(eft->day, eft->month - 1, eft->year);
-}
-/*
- * returns day of the week [0-6] 0=Sunday
- *
- * Don't try to provide a year that's before 1998, please !
- */
-static int
-compute_wday(efi_time_t *eft)
-{
- int y;
- int ndays = 0;
-
- if (eft->year < 1998) {
- pr_err("EFI year < 1998, invalid date\n");
- return -1;
- }
-
- for (y = EFI_RTC_EPOCH; y < eft->year; y++)
- ndays += 365 + (is_leap_year(y) ? 1 : 0);
-
- ndays += compute_yday(eft);
-
- /*
- * 4=1/1/1998 was a Thursday
- */
- return (ndays + 4) % 7;
-}
-
-static void
-convert_to_efi_time(struct rtc_time *wtime, efi_time_t *eft)
-{
- eft->year = wtime->tm_year + 1900;
- eft->month = wtime->tm_mon + 1;
- eft->day = wtime->tm_mday;
- eft->hour = wtime->tm_hour;
- eft->minute = wtime->tm_min;
- eft->second = wtime->tm_sec;
- eft->nanosecond = 0;
- eft->daylight = wtime->tm_isdst ? EFI_ISDST : 0;
-#ifdef CONFIG_IA64
- /* avoid overwrite timezone on non-IA64 platform. e.g. x86_64 */
- eft->timezone = EFI_UNSPECIFIED_TIMEZONE;
-#endif
-}
-
-static void
-convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime)
-{
- memset(wtime, 0, sizeof(*wtime));
- wtime->tm_sec = eft->second;
- wtime->tm_min = eft->minute;
- wtime->tm_hour = eft->hour;
- wtime->tm_mday = eft->day;
- wtime->tm_mon = eft->month - 1;
- wtime->tm_year = eft->year - 1900;
-
- /* day of the week [0-6], Sunday=0 */
- wtime->tm_wday = compute_wday(eft);
-
- /* day in the year [1-365]*/
- wtime->tm_yday = compute_yday(eft);
-
-
- switch (eft->daylight & EFI_ISDST) {
- case EFI_ISDST:
- wtime->tm_isdst = 1;
- break;
- case EFI_TIME_ADJUST_DAYLIGHT:
- wtime->tm_isdst = 0;
- break;
- default:
- wtime->tm_isdst = -1;
- }
-}
-
static int efi_read_gmtoff(struct device *dev, long int *arg)
{
efi_status_t status;
@@ -230,54 +141,22 @@ static int efi_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
return status == EFI_SUCCESS ? 0 : -EINVAL;
}
-static int efi_read_time(struct device *dev, struct rtc_time *tm)
+static int efi_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
- efi_status_t status;
- efi_time_t eft;
- efi_time_cap_t cap;
-
- status = efi.get_time(&eft, &cap);
-
- if (status != EFI_SUCCESS) {
- /* should never happen */
- dev_err(dev, "can't read time\n");
- return -EINVAL;
- }
-
- convert_from_efi_time(&eft, tm);
-
- return rtc_valid_tm(tm);
+ return efi_read_time(tm);
}
-static int efi_set_time(struct device *dev, struct rtc_time *tm)
+static int efi_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
- efi_status_t status;
- efi_time_t eft;
-#ifdef CONFIG_X86
- efi_time_cap_t cap;
-
- /* read time for grab timezone to avoid overwrite it */
- status = efi.get_time(&eft, &cap);
-
- if (status != EFI_SUCCESS) {
- pr_err("efitime: can't read time\n");
- return -EINVAL;
- }
-#endif
-
- convert_to_efi_time(tm, &eft);
-
- status = efi.set_time(&eft);
-
- return status == EFI_SUCCESS ? 0 : -EINVAL;
+ return efi_set_time(tm);
}
static const struct rtc_class_ops efi_rtc_ops = {
#ifdef CONFIG_X86
.ioctl = efi_rtc_ioctl,
#endif
- .read_time = efi_read_time,
- .set_time = efi_set_time,
+ .read_time = efi_rtc_read_time,
+ .set_time = efi_rtc_set_time,
.read_alarm = efi_read_alarm,
.set_alarm = efi_set_alarm,
};
diff --git a/include/linux/efi.h b/include/linux/efi.h
index fc8fa0e..3859f3e 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -132,6 +132,12 @@ typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);
#define EFI_TIME_ADJUST_DAYLIGHT 0x1
#define EFI_TIME_IN_DAYLIGHT 0x2
#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
+#define EFI_ISDST (EFI_TIME_ADJUST_DAYLIGHT|EFI_TIME_IN_DAYLIGHT)
+
+/*
+ * EFI Epoch is 1/1/1998
+ */
+#define EFI_RTC_EPOCH 1998
typedef struct {
u16 year;
@@ -154,6 +160,90 @@ typedef struct {
} efi_time_cap_t;
/*
+ * returns day of the year [0-365]
+ */
+static inline int
+compute_yday(efi_time_t *eft)
+{
+ /* efi_time_t.month is in the [1-12] so, we need -1 */
+ return rtc_year_days(eft->day, eft->month - 1, eft->year);
+}
+
+/*
+ * returns day of the week [0-6] 0=Sunday
+ *
+ * Don't try to provide a year that's before 1998, please !
+ */
+static inline int
+compute_wday(efi_time_t *eft)
+{
+ int y;
+ int ndays = 0;
+
+ if (eft->year < 1998) {
+ pr_err("EFI year < 1998, invalid date\n");
+ return -1;
+ }
+
+ for (y = EFI_RTC_EPOCH; y < eft->year; y++)
+ ndays += 365 + (is_leap_year(y) ? 1 : 0);
+
+ ndays += compute_yday(eft);
+
+ /*
+ * 4=1/1/1998 was a Thursday
+ */
+ return (ndays + 4) % 7;
+}
+
+static inline void
+convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime)
+{
+ memset(wtime, 0, sizeof(*wtime));
+ wtime->tm_sec = eft->second;
+ wtime->tm_min = eft->minute;
+ wtime->tm_hour = eft->hour;
+ wtime->tm_mday = eft->day;
+ wtime->tm_mon = eft->month - 1;
+ wtime->tm_year = eft->year - 1900;
+
+ /* day of the week [0-6], Sunday=0 */
+ wtime->tm_wday = compute_wday(eft);
+
+ /* day in the year [1-365]*/
+ wtime->tm_yday = compute_yday(eft);
+
+ switch (eft->daylight & EFI_ISDST) {
+ case EFI_ISDST:
+ wtime->tm_isdst = 1;
+ break;
+ case EFI_TIME_ADJUST_DAYLIGHT:
+ wtime->tm_isdst = 0;
+ break;
+ default:
+ wtime->tm_isdst = -1;
+ }
+}
+
+static inline void
+convert_to_efi_time(struct rtc_time *wtime, efi_time_t *eft)
+{
+ eft->year = wtime->tm_year + 1900;
+ eft->month = wtime->tm_mon + 1;
+ eft->day = wtime->tm_mday;
+ eft->hour = wtime->tm_hour;
+ eft->minute = wtime->tm_min;
+ eft->second = wtime->tm_sec;
+ eft->nanosecond = 0;
+ eft->daylight = wtime->tm_isdst ? EFI_ISDST : 0;
+#ifdef CONFIG_IA64
+ /* avoid overwrite timezone on non-IA64 platform. e.g. x86_64 */
+ eft->timezone = EFI_UNSPECIFIED_TIMEZONE;
+#endif
+}
+
+
+/*
* EFI Boot Services table
*/
typedef struct {
@@ -585,6 +675,50 @@ efi_guid_unparse(efi_guid_t *guid, char *out)
return out;
}
+static inline int
+efi_set_time(struct rtc_time *tm)
+{
+ efi_status_t status;
+ efi_time_t eft;
+#ifdef CONFIG_X86
+ efi_time_cap_t cap;
+
+ /* read time for grab timezone to avoid overwrite it */
+ status = efi.get_time(&eft, &cap);
+
+ if (status != EFI_SUCCESS) {
+ pr_err("efi: can't read time\n");
+ return -EINVAL;
+ }
+#endif
+
+ convert_to_efi_time(tm, &eft);
+
+ status = efi.set_time(&eft);
+
+ return status == EFI_SUCCESS ? 0 : -EINVAL;
+}
+
+static inline int
+efi_read_time(struct rtc_time *tm)
+{
+ efi_status_t status;
+ efi_time_t eft;
+ efi_time_cap_t cap;
+
+ status = efi.get_time(&eft, &cap);
+
+ if (status != EFI_SUCCESS) {
+ /* should never happen */
+ pr_err("efi: can't read time\n");
+ return -EINVAL;
+ }
+
+ convert_from_efi_time(&eft, tm);
+
+ return rtc_valid_tm(tm);
+}
+
extern void efi_init (void);
extern void *efi_get_pal_addr (void);
extern void efi_map_pal_code (void);
--
1.6.4.2
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