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