1/* $Id: rtc.h,v 1.1.1.1 2007/08/03 18:53:22 Exp $ */ 2 3#ifndef __RTC_H__ 4#define __RTC_H__ 5 6 7 8#ifdef CONFIG_ETRAX_DS1302 9 /* Dallas DS1302 clock/calendar register numbers. */ 10# define RTC_SECONDS 0 11# define RTC_MINUTES 1 12# define RTC_HOURS 2 13# define RTC_DAY_OF_MONTH 3 14# define RTC_MONTH 4 15# define RTC_WEEKDAY 5 16# define RTC_YEAR 6 17# define RTC_CONTROL 7 18 19 /* Bits in CONTROL register. */ 20# define RTC_CONTROL_WRITEPROTECT 0x80 21# define RTC_TRICKLECHARGER 8 22 23 /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */ 24# define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */ 25# define RTC_TCR_1DIOD 0x04 /* xxxx01xx */ 26# define RTC_TCR_2DIOD 0x08 /* xxxx10xx */ 27# define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */ 28# define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */ 29# define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */ 30# define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */ 31 32#elif defined(CONFIG_ETRAX_PCF8563) 33 /* I2C bus slave registers. */ 34# define RTC_I2C_READ 0xa3 35# define RTC_I2C_WRITE 0xa2 36 37 /* Phillips PCF8563 registers. */ 38# define RTC_CONTROL1 0x00 /* Control/Status register 1. */ 39# define RTC_CONTROL2 0x01 /* Control/Status register 2. */ 40# define RTC_CLOCKOUT_FREQ 0x0d /* CLKOUT frequency. */ 41# define RTC_TIMER_CONTROL 0x0e /* Timer control. */ 42# define RTC_TIMER_CNTDOWN 0x0f /* Timer countdown. */ 43 44 /* BCD encoded clock registers. */ 45# define RTC_SECONDS 0x02 46# define RTC_MINUTES 0x03 47# define RTC_HOURS 0x04 48# define RTC_DAY_OF_MONTH 0x05 49# define RTC_WEEKDAY 0x06 /* Not coded in BCD! */ 50# define RTC_MONTH 0x07 51# define RTC_YEAR 0x08 52# define RTC_MINUTE_ALARM 0x09 53# define RTC_HOUR_ALARM 0x0a 54# define RTC_DAY_ALARM 0x0b 55# define RTC_WEEKDAY_ALARM 0x0c 56 57#endif 58 59#ifdef CONFIG_ETRAX_DS1302 60extern unsigned char ds1302_readreg(int reg); 61extern void ds1302_writereg(int reg, unsigned char val); 62extern int ds1302_init(void); 63# define CMOS_READ(x) ds1302_readreg(x) 64# define CMOS_WRITE(val,reg) ds1302_writereg(reg,val) 65# define RTC_INIT() ds1302_init() 66#elif defined(CONFIG_ETRAX_PCF8563) 67extern unsigned char pcf8563_readreg(int reg); 68extern void pcf8563_writereg(int reg, unsigned char val); 69extern int pcf8563_init(void); 70# define CMOS_READ(x) pcf8563_readreg(x) 71# define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val) 72# define RTC_INIT() pcf8563_init() 73#else 74 /* No RTC configured so we shouldn't try to access any. */ 75# define CMOS_READ(x) 42 76# define CMOS_WRITE(x,y) 77# define RTC_INIT() (-1) 78#endif 79 80/* 81 * The struct used to pass data via the following ioctl. Similar to the 82 * struct tm in <time.h>, but it needs to be here so that the kernel 83 * source is self contained, allowing cross-compiles, etc. etc. 84 */ 85struct rtc_time { 86 int tm_sec; 87 int tm_min; 88 int tm_hour; 89 int tm_mday; 90 int tm_mon; 91 int tm_year; 92 int tm_wday; 93 int tm_yday; 94 int tm_isdst; 95}; 96 97/* ioctl() calls that are permitted to the /dev/rtc interface. */ 98#define RTC_MAGIC 'p' 99#define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */ 100#define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */ 101#define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int) 102#define RTC_VLOW_RD _IOR(RTC_MAGIC, 0x11, int) /* Voltage Low detector */ 103#define RTC_VLOW_SET _IO(RTC_MAGIC, 0x12) /* Clear voltage low information */ 104#define RTC_MAX_IOCTL 0x12 105 106#endif /* __RTC_H__ */ 107