4 #include <linux/config.h>
6 #ifdef CONFIG_ETRAX_DS1302
7 /* Dallas DS1302 clock/calendar register numbers. */
11 # define RTC_DAY_OF_MONTH 3
13 # define RTC_WEEKDAY 5
15 # define RTC_CONTROL 7
17 /* Bits in CONTROL register. */
18 # define RTC_CONTROL_WRITEPROTECT 0x80
19 # define RTC_TRICKLECHARGER 8
21 /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
22 # define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */
23 # define RTC_TCR_1DIOD 0x04 /* xxxx01xx */
24 # define RTC_TCR_2DIOD 0x08 /* xxxx10xx */
25 # define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */
26 # define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2kOhm */
27 # define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */
28 # define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */
30 #elif defined(CONFIG_ETRAX_PCF8563)
31 /* I2C bus slave registers. */
32 # define RTC_I2C_READ 0xa3
33 # define RTC_I2C_WRITE 0xa2
35 /* Phillips PCF8563 registers. */
36 # define RTC_CONTROL1 0x00 /* Control/Status register 1. */
37 # define RTC_CONTROL2 0x01 /* Control/Status register 2. */
38 # define RTC_CLOCKOUT_FREQ 0x0d /* CLKOUT frequency. */
39 # define RTC_TIMER_CONTROL 0x0e /* Timer control. */
40 # define RTC_TIMER_CNTDOWN 0x0f /* Timer countdown. */
42 /* BCD encoded clock registers. */
43 # define RTC_SECONDS 0x02
44 # define RTC_MINUTES 0x03
45 # define RTC_HOURS 0x04
46 # define RTC_DAY_OF_MONTH 0x05
47 # define RTC_WEEKDAY 0x06 /* Not coded in BCD! */
48 # define RTC_MONTH 0x07
49 # define RTC_YEAR 0x08
50 # define RTC_MINUTE_ALARM 0x09
51 # define RTC_HOUR_ALARM 0x0a
52 # define RTC_DAY_ALARM 0x0b
53 # define RTC_WEEKDAY_ALARM 0x0c /* Not coded in BCD! */
55 /* Control/Status 2 bits */
56 # define RTC_CTRL2_TIE 0x01 /* Timer Interrupt Enable */
57 # define RTC_CTRL2_AIE 0x02 /* Alarm Interrupt Enable */
58 # define RTC_CTRL2_TF 0x04 /* Timer Flag */
59 # define RTC_CTRL2_AF 0x08 /* Alarm Flag */
60 # define RTC_CTRL2_TP 0x10 /* Timer Pulse */
62 /* Timer Control bits */
63 # define RTC_TC_TD0 0x01
64 # define RTC_TC_TD1 0x02
65 # define RTC_TC_TE 0x80 /* Timer Enable */
67 /* Timer source clock frequency */
68 # define RTC_TC_FREQ_MASK (RTC_TC_TD0 | RTC_TC_TD1)
69 # define RTC_TC_FREQ_4096 (0)
70 # define RTC_TC_FREQ_64 (RTC_TC_TD0)
71 # define RTC_TC_FREQ_1 (RTC_TC_TD1)
72 # define RTC_TC_FREQ_1_60 (RTC_TC_TD0 | RTC_TC_TD1)
76 #ifdef CONFIG_ETRAX_DS1302
77 extern unsigned char ds1302_readreg(int reg);
78 extern void ds1302_writereg(int reg, unsigned char val);
79 extern int ds1302_init(void);
80 # define CMOS_READ(x) ds1302_readreg(x)
81 # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
82 # define RTC_INIT() ds1302_init()
83 #elif defined(CONFIG_ETRAX_PCF8563)
84 extern unsigned char pcf8563_readreg(int reg);
85 extern void pcf8563_writereg(int reg, unsigned char val);
86 extern int pcf8563_init(void);
87 # define CMOS_READ(x) pcf8563_readreg(x)
88 # define CMOS_WRITE(val,reg) pcf8563_writereg(reg,val)
89 # define RTC_INIT() pcf8563_init()
91 /* No RTC configured so we shouldn't try to access any. */
92 # define CMOS_READ(x) 42
93 # define CMOS_WRITE(x,y)
94 # define RTC_INIT() (-1)
97 /* Conversions to and from the RTC BCD encoded format. */
98 #define BCD_TO_BIN(x) ((x)=((x)&15) + ((x)>>4)*10)
99 #define BIN_TO_BCD(x) ((x)=(((x)/10)<<4) + (x)%10)
102 * The struct used to pass data via the following ioctl. Similar to the
103 * struct tm in <time.h>, but it needs to be here so that the kernel
104 * source is self contained, allowing cross-compiles, etc. etc.
118 /* ioctl() calls that are permitted to the /dev/rtc interface. */
119 #define RTC_MAGIC 'p'
120 #define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */
121 #define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */
122 #define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int)
123 #define RTC_VLOW_RD _IOR(RTC_MAGIC, 0x11, int) /* Voltage Low detector */
124 #define RTC_VLOW_SET _IO(RTC_MAGIC, 0x12) /* Clear voltage low information */
125 #define RTC_MAX_IOCTL 0x12
127 #endif /* __RTC_H__ */