rtc.h
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上传日期:2013-04-10
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- /* $Id: rtc.h,v 1.5 2002/08/14 11:04:10 sebsjo Exp $ */
- #ifndef __RTC_H__
- #define __RTC_H__
- #include <linux/config.h>
- #ifdef CONFIG_ETRAX_DS1302
- /* 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 */
- #elif defined(CONFIG_ETRAX_PCF8563)
- /* I2C bus slave registers. */
- # define RTC_I2C_READ 0xa3
- # define RTC_I2C_WRITE 0xa2
- /* Phillips PCF8563 registers. */
- # define RTC_CONTROL1 0x00 /* Control/Status register 1. */
- # define RTC_CONTROL2 0x01 /* Control/Status register 2. */
- # define RTC_CLOCKOUT_FREQ 0x0d /* CLKOUT frequency. */
- # define RTC_TIMER_CONTROL 0x0e /* Timer control. */
- # define RTC_TIMER_CNTDOWN 0x0f /* Timer countdown. */
- /* BCD encoded clock registers. */
- # define RTC_SECONDS 0x02
- # define RTC_MINUTES 0x03
- # define RTC_HOURS 0x04
- # define RTC_DAY_OF_MONTH 0x05
- # define RTC_WEEKDAY 0x06 /* Not coded in BCD! */
- # define RTC_MONTH 0x07
- # define RTC_YEAR 0x08
- # define RTC_MINUTE_ALARM 0x09
- # define RTC_HOUR_ALARM 0x0a
- # define RTC_DAY_ALARM 0x0b
- # define RTC_WEEKDAY_ALARM 0x0c
- #endif
- #ifdef CONFIG_ETRAX_DS1302
- # define CMOS_READ(x) ds1302_readreg(x)
- # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
- # define RTC_INIT() ds1302_init()
- #elif defined(CONFIG_ETRAX_PCF8563)
- # define CMOS_READ(x) i2c_readreg(RTC_I2C_READ, x)
- # define CMOS_WRITE(val,reg) i2c_writereg(RTC_I2C_WRITE,reg,val)
- # define RTC_INIT() pcf8563_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
- /* Conversions to and from the RTC BCD encoded format. */
- #define BCD_TO_BIN(x) ((x)=((x)&15) + ((x)>>4)*10)
- #define BIN_TO_BCD(x) ((x)=(((x)/10)<<4) + (x)%10)
- /*
- * 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. */
- #ifdef CONFIG_ETRAX_DS1302
- # define DS1302_MAGIC 'p'
- # define RTC_RD_TIME _IOR(DS1302_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */
- # define RTC_SET_TIME _IOW(DS1302_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */
- # define RTC_SET_CHARGE _IOW(DS1302_MAGIC, 0x0b, int) /* Set CHARGE mode. */
- #elif defined(CONFIG_ETRAX_PCF8563)
- # define PCF8563_MAGIC 'T'
- # define RTC_RD_TIME _IOR(PCF8563_MAGIC, 0x01, struct rtc_time) /* Read RTC time. */
- # define RTC_SET_TIME _IOW(PCF8563_MAGIC, 0x02, struct rtc_time) /* Set RTC time. */
- # define RTC_SET_CHARGE _IOW(PCF8563_MAGIC, 0x03, int)
- # define RTC_MAX_IOCTL 3
- #endif
- #endif /* __RTC_H__ */