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1da177e4 LT |
1 | /* $Id: rtc.h,v 1.7 2002/11/04 07:32:09 starvik 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 | extern unsigned char ds1302_readreg(int reg); | |
62 | extern void ds1302_writereg(int reg, unsigned char val); | |
63 | extern int ds1302_init(void); | |
64 | # define CMOS_READ(x) ds1302_readreg(x) | |
65 | # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val) | |
66 | # define RTC_INIT() ds1302_init() | |
67 | #elif defined(CONFIG_ETRAX_PCF8563) | |
68 | extern unsigned char pcf8563_readreg(int reg); | |
69 | extern void pcf8563_writereg(int reg, unsigned char val); | |
70 | extern int pcf8563_init(void); | |
71 | # define CMOS_READ(x) pcf8563_readreg(x) | |
72 | # define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val) | |
73 | # define RTC_INIT() pcf8563_init() | |
74 | #else | |
75 | /* No RTC configured so we shouldn't try to access any. */ | |
76 | # define CMOS_READ(x) 42 | |
77 | # define CMOS_WRITE(x,y) | |
78 | # define RTC_INIT() (-1) | |
79 | #endif | |
80 | ||
81 | /* | |
82 | * The struct used to pass data via the following ioctl. Similar to the | |
83 | * struct tm in <time.h>, but it needs to be here so that the kernel | |
84 | * source is self contained, allowing cross-compiles, etc. etc. | |
85 | */ | |
86 | struct rtc_time { | |
87 | int tm_sec; | |
88 | int tm_min; | |
89 | int tm_hour; | |
90 | int tm_mday; | |
91 | int tm_mon; | |
92 | int tm_year; | |
93 | int tm_wday; | |
94 | int tm_yday; | |
95 | int tm_isdst; | |
96 | }; | |
97 | ||
98 | /* ioctl() calls that are permitted to the /dev/rtc interface. */ | |
99 | #define RTC_MAGIC 'p' | |
100 | #define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */ | |
101 | #define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */ | |
102 | #define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int) | |
103 | #define RTC_VLOW_RD _IOR(RTC_MAGIC, 0x11, int) /* Voltage Low detector */ | |
104 | #define RTC_VLOW_SET _IO(RTC_MAGIC, 0x12) /* Clear voltage low information */ | |
105 | #define RTC_MAX_IOCTL 0x12 | |
106 | ||
107 | #endif /* __RTC_H__ */ |