66 lines
2 KiB
C
66 lines
2 KiB
C
|
#ifndef __RTC_H__
|
||
|
|
#define __RTC_H__
|
||
|
|
|
||
|
|
/* Dallas DS1302 clock/calendar register numbers. */
|
||
|
|
# define RTC_SECONDS 0
|
||
|
|
# define RTC_MINUTES 1
|
||
|
|
# define RTC_HOURS 2
|
||
|
|
# define RTC_DAY_OF_MONTH 3
|
||
|
|
# define RTC_MONTH 4
|
||
|
|
# define RTC_WEEKDAY 5
|
||
|
|
# define RTC_YEAR 6
|
||
|
|
# define RTC_CONTROL 7
|
||
|
|
|
||
|
|
/* Bits in CONTROL register. */
|
||
|
|
# define RTC_CONTROL_WRITEPROTECT 0x80
|
||
|
|
# define RTC_TRICKLECHARGER 8
|
||
|
|
|
||
|
|
/* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
|
||
|
|
# define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */
|
||
|
|
# define RTC_TCR_1DIOD 0x04 /* xxxx01xx */
|
||
|
|
# define RTC_TCR_2DIOD 0x08 /* xxxx10xx */
|
||
|
|
# define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */
|
||
|
|
# define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */
|
||
|
|
# define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */
|
||
|
|
# define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */
|
||
|
|
|
||
|
|
#ifdef CONFIG_DS1302
|
||
|
|
extern unsigned char ds1302_readreg(int reg);
|
||
|
|
extern void ds1302_writereg(int reg, unsigned char val);
|
||
|
|
extern int ds1302_init(void);
|
||
|
|
# define CMOS_READ(x) ds1302_readreg(x)
|
||
|
|
# define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
|
||
|
|
# define RTC_INIT() ds1302_init()
|
||
|
|
#else
|
||
|
|
/* No RTC configured so we shouldn't try to access any. */
|
||
|
|
# define CMOS_READ(x) 42
|
||
|
|
# define CMOS_WRITE(x,y)
|
||
|
|
# define RTC_INIT() (-1)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The struct used to pass data via the following ioctl. Similar to the
|
||
|
|
* struct tm in <time.h>, but it needs to be here so that the kernel
|
||
|
|
* source is self contained, allowing cross-compiles, etc. etc.
|
||
|
|
*/
|
||
|
|
struct rtc_time {
|
||
|
|
int tm_sec;
|
||
|
|
int tm_min;
|
||
|
|
int tm_hour;
|
||
|
|
int tm_mday;
|
||
|
|
int tm_mon;
|
||
|
|
int tm_year;
|
||
|
|
int tm_wday;
|
||
|
|
int tm_yday;
|
||
|
|
int tm_isdst;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ioctl() calls that are permitted to the /dev/rtc interface. */
|
||
|
|
#define RTC_MAGIC 'p'
|
||
|
|
#define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */
|
||
|
|
#define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */
|
||
|
|
#define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int)
|
||
|
|
#define RTC_MAX_IOCTL 0x0b
|
||
|
|
|
||
|
|
#endif /* __RTC_H__ */
|