1/* $Id: rtc.h,v 1.1.1.1 2008/10/15 03:29:02 james26_jang Exp $ */
2
3#ifndef __RTC_H__
4#define __RTC_H__
5
6
7#include <linux/config.h>
8
9#ifdef CONFIG_ETRAX_DS1302
10   /* Dallas DS1302 clock/calendar register numbers. */
11#  define RTC_SECONDS      0
12#  define RTC_MINUTES      1
13#  define RTC_HOURS        2
14#  define RTC_DAY_OF_MONTH 3
15#  define RTC_MONTH        4
16#  define RTC_WEEKDAY      5
17#  define RTC_YEAR         6
18#  define RTC_CONTROL      7
19
20   /* Bits in CONTROL register. */
21#  define RTC_CONTROL_WRITEPROTECT 	0x80
22#  define RTC_TRICKLECHARGER 		8
23
24  /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
25#  define RTC_TCR_PATTERN 	0xA0	/* 1010xxxx */
26#  define RTC_TCR_1DIOD 	0x04	/* xxxx01xx */
27#  define RTC_TCR_2DIOD 	0x08	/* xxxx10xx */
28#  define RTC_TCR_DISABLED 	0x00	/* xxxxxx00 Disabled */
29#  define RTC_TCR_2KOHM 	0x01	/* xxxxxx01 2KOhm */
30#  define RTC_TCR_4KOHM 	0x02	/* xxxxxx10 4kOhm */
31#  define RTC_TCR_8KOHM 	0x03	/* xxxxxx11 8kOhm */
32
33#elif defined(CONFIG_ETRAX_PCF8563)
34   /* I2C bus slave registers. */
35#  define RTC_I2C_READ		0xa3
36#  define RTC_I2C_WRITE		0xa2
37
38   /* Phillips PCF8563 registers. */
39#  define RTC_CONTROL1		0x00		/* Control/Status register 1. */
40#  define RTC_CONTROL2		0x01		/* Control/Status register 2. */
41#  define RTC_CLOCKOUT_FREQ	0x0d		/* CLKOUT frequency. */
42#  define RTC_TIMER_CONTROL	0x0e		/* Timer control. */
43#  define RTC_TIMER_CNTDOWN	0x0f		/* Timer countdown. */
44
45   /* BCD encoded clock registers. */
46#  define RTC_SECONDS		0x02
47#  define RTC_MINUTES		0x03
48#  define RTC_HOURS		0x04
49#  define RTC_DAY_OF_MONTH	0x05
50#  define RTC_WEEKDAY		0x06	/* Not coded in BCD! */
51#  define RTC_MONTH		0x07
52#  define RTC_YEAR		0x08
53#  define RTC_MINUTE_ALARM	0x09
54#  define RTC_HOUR_ALARM	0x0a
55#  define RTC_DAY_ALARM		0x0b
56#  define RTC_WEEKDAY_ALARM 0x0c
57
58#endif
59
60#ifdef CONFIG_ETRAX_DS1302
61#  define CMOS_READ(x) ds1302_readreg(x)
62#  define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
63#  define RTC_INIT() ds1302_init()
64#elif defined(CONFIG_ETRAX_PCF8563)
65#  define CMOS_READ(x) i2c_readreg(RTC_I2C_READ, x)
66#  define CMOS_WRITE(val,reg) i2c_writereg(RTC_I2C_WRITE,reg,val)
67#  define RTC_INIT() pcf8563_init()
68#else
69  /* No RTC configured so we shouldn't try to access any. */
70#  define CMOS_READ(x) 42
71#  define CMOS_WRITE(x,y)
72#  define RTC_INIT() (-1)
73#endif
74
75/* Conversions to and from the RTC BCD encoded format. */
76#define BCD_TO_BIN(x) ((x)=((x)&15) + ((x)>>4)*10)
77#define BIN_TO_BCD(x) ((x)=(((x)/10)<<4) + (x)%10)
78
79/*
80 * The struct used to pass data via the following ioctl. Similar to the
81 * struct tm in <time.h>, but it needs to be here so that the kernel
82 * source is self contained, allowing cross-compiles, etc. etc.
83 */
84struct rtc_time {
85	int tm_sec;
86	int tm_min;
87	int tm_hour;
88	int tm_mday;
89	int tm_mon;
90	int tm_year;
91	int tm_wday;
92	int tm_yday;
93	int tm_isdst;
94};
95
96/* ioctl() calls that are permitted to the /dev/rtc interface. */
97#ifdef CONFIG_ETRAX_DS1302
98#  define DS1302_MAGIC 'p'
99#  define RTC_RD_TIME		_IOR(DS1302_MAGIC, 0x09, struct rtc_time) 	/* Read RTC time. */
100#  define RTC_SET_TIME		_IOW(DS1302_MAGIC, 0x0a, struct rtc_time) 	/* Set RTC time. */
101#  define RTC_SET_CHARGE  	_IOW(DS1302_MAGIC, 0x0b, int) 				/* Set CHARGE mode. */
102#elif defined(CONFIG_ETRAX_PCF8563)
103#  define PCF8563_MAGIC 'T'
104#  define RTC_RD_TIME		_IOR(PCF8563_MAGIC, 0x01, struct rtc_time)	/* Read RTC time. */
105#  define RTC_SET_TIME		_IOW(PCF8563_MAGIC, 0x02, struct rtc_time)	/* Set RTC time. */
106#  define RTC_SET_CHARGE  	_IOW(PCF8563_MAGIC, 0x03, int)
107#  define RTC_MAX_IOCTL 3
108#endif
109
110#endif /* __RTC_H__ */
111