1 /* $Id: rtc.h,v 1.7 2002/11/04 07:32:09 starvik Exp $ */
7 #include <linux/config.h>
9 #ifdef CONFIG_ETRAX_DS1302
10 /* Dallas DS1302 clock/calendar register numbers. */
11 # define RTC_SECONDS 0
12 # define RTC_MINUTES 1
14 # define RTC_DAY_OF_MONTH 3
16 # define RTC_WEEKDAY 5
18 # define RTC_CONTROL 7
20 /* Bits in CONTROL register. */
21 # define RTC_CONTROL_WRITEPROTECT 0x80
22 # define RTC_TRICKLECHARGER 8
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 */
33 #elif defined(CONFIG_ETRAX_PCF8563)
34 /* I2C bus slave registers. */
35 # define RTC_I2C_READ 0xa3
36 # define RTC_I2C_WRITE 0xa2
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. */
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
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()
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)
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.
98 /* ioctl() calls that are permitted to the /dev/rtc interface. */
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
107 #endif /* __RTC_H__ */