4  * Copyright (C) 1999 Hewlett-Packard Co
10  * clock by using EFI instead of direct bit fiddling. The functionalities are 
20  *	- Locking is required for safe execution of EFI calls with regards
24  * 	- provide the API to set/get the WakeUp Alarm (different from the
26  *	- SMP testing
27  * 	- Add module support
67  * returns day of the year [0-365]
72 	/* efi_time_t.month is in the [1-12] so, we need -1 */  in compute_yday()
73 	return  __mon_yday[is_leap(eft->year)][eft->month-1]+ eft->day -1;  in compute_yday()
76  * returns day of the week [0-6] 0=Sunday
86 	if ( eft->year < 1998 ) {  in compute_wday()
88 		return -1;  in compute_wday()
91 	for(y=EFI_RTC_EPOCH; y < eft->year; y++ ) {  in compute_wday()
106 	eft->year	= wtime->tm_year + 1900;  in convert_to_efi_time()
107 	eft->month	= wtime->tm_mon + 1;   in convert_to_efi_time()
108 	eft->day	= wtime->tm_mday;  in convert_to_efi_time()
109 	eft->hour	= wtime->tm_hour;  in convert_to_efi_time()
110 	eft->minute	= wtime->tm_min;  in convert_to_efi_time()
111 	eft->second 	= wtime->tm_sec;  in convert_to_efi_time()
112 	eft->nanosecond = 0;   in convert_to_efi_time()
113 	eft->daylight	= wtime->tm_isdst ? EFI_ISDST: 0;  in convert_to_efi_time()
114 	eft->timezone	= EFI_UNSPECIFIED_TIMEZONE;  in convert_to_efi_time()
121 	wtime->tm_sec  = eft->second;  in convert_from_efi_time()
122 	wtime->tm_min  = eft->minute;  in convert_from_efi_time()
123 	wtime->tm_hour = eft->hour;  in convert_from_efi_time()
124 	wtime->tm_mday = eft->day;  in convert_from_efi_time()
125 	wtime->tm_mon  = eft->month - 1;  in convert_from_efi_time()
126 	wtime->tm_year = eft->year - 1900;  in convert_from_efi_time()
128 	/* day of the week [0-6], Sunday=0 */  in convert_from_efi_time()
129 	wtime->tm_wday = compute_wday(eft);  in convert_from_efi_time()
131 	/* day in the year [1-365]*/  in convert_from_efi_time()
132 	wtime->tm_yday = compute_yday(eft);  in convert_from_efi_time()
135 	switch (eft->daylight & EFI_ISDST) {  in convert_from_efi_time()
137 			wtime->tm_isdst = 1;  in convert_from_efi_time()
140 			wtime->tm_isdst = 0;  in convert_from_efi_time()
143 			wtime->tm_isdst = -1;  in convert_from_efi_time()
172 			return -EINVAL;  in efi_rtc_ioctl()
184 				return -EINVAL;  in efi_rtc_ioctl()
190 					    sizeof (struct rtc_time)) ? - EFAULT : 0;  in efi_rtc_ioctl()
194 			if (!capable(CAP_SYS_TIME)) return -EACCES;  in efi_rtc_ioctl()
198 				return -EFAULT;  in efi_rtc_ioctl()
208 			return status == EFI_SUCCESS ? 0 : -EINVAL;  in efi_rtc_ioctl()
212 			if (!capable(CAP_SYS_TIME)) return -EACCES;  in efi_rtc_ioctl()
216 			if (  get_user(enabled, &ewp->enabled)  in efi_rtc_ioctl()
217 			   || copy_from_user(&wtime, &ewp->time, sizeof(struct rtc_time)) )  in efi_rtc_ioctl()
218 				return -EFAULT;  in efi_rtc_ioctl()
233 			return status == EFI_SUCCESS ? 0 : -EINVAL;  in efi_rtc_ioctl()
243 			if (status != EFI_SUCCESS) return -EINVAL;  in efi_rtc_ioctl()
247 			if (  put_user(enabled, &ewp->enabled)  in efi_rtc_ioctl()
248 			   || put_user(pending, &ewp->pending)) return -EFAULT;  in efi_rtc_ioctl()
252 			return copy_to_user(&ewp->time, &wtime,  in efi_rtc_ioctl()
253 					    sizeof(struct rtc_time)) ? -EFAULT : 0;  in efi_rtc_ioctl()
255 	return -ENOTTY;  in efi_rtc_ioctl()
322 		     "Date           : %u-%u-%u\n"  in efi_rtc_get_status()
337 		     "Alarm Date     : %u-%u-%u\n"  in efi_rtc_get_status()
358 		     "Accuracy       : %u\n"  in efi_rtc_get_status()
360 		      cap.resolution, cap.accuracy, cap.sets_to_zero);  in efi_rtc_get_status()
362 	return  p - buf;  in efi_rtc_get_status()
372         len -= off;  in efi_rtc_read_proc()
398 		return -1;  in efi_rtc_init()