1 /* $Id: rtc.h,v 1.1.1.1 2004/03/25 04:29:22 hitoshiy Exp $ */
8 /* Dallas DS1302 clock/calendar register numbers. */
10 # define RTC_MINUTES 1
12 # define RTC_DAY_OF_MONTH 3
14 # define RTC_WEEKDAY 5
16 # define RTC_CONTROL 7
18 /* Bits in CONTROL register. */
19 # define RTC_CONTROL_WRITEPROTECT 0x80
20 # define RTC_TRICKLECHARGER 8
22 /* Bits in TRICKLECHARGER register TCS TCS TCS TCS DS DS RS RS. */
23 # define RTC_TCR_PATTERN 0xA0 /* 1010xxxx */
24 # define RTC_TCR_1DIOD 0x04 /* xxxx01xx */
25 # define RTC_TCR_2DIOD 0x08 /* xxxx10xx */
26 # define RTC_TCR_DISABLED 0x00 /* xxxxxx00 Disabled */
27 # define RTC_TCR_2KOHM 0x01 /* xxxxxx01 2KOhm */
28 # define RTC_TCR_4KOHM 0x02 /* xxxxxx10 4kOhm */
29 # define RTC_TCR_8KOHM 0x03 /* xxxxxx11 8kOhm */
32 extern unsigned char ds1302_readreg(int reg);
33 extern void ds1302_writereg(int reg, unsigned char val);
34 extern int ds1302_init(void);
35 # define CMOS_READ(x) ds1302_readreg(x)
36 # define CMOS_WRITE(val,reg) ds1302_writereg(reg,val)
37 # define RTC_INIT() ds1302_init()
39 /* No RTC configured so we shouldn't try to access any. */
40 # define CMOS_READ(x) 42
41 # define CMOS_WRITE(x,y)
42 # define RTC_INIT() (-1)
46 * The struct used to pass data via the following ioctl. Similar to the
47 * struct tm in <time.h>, but it needs to be here so that the kernel
48 * source is self contained, allowing cross-compiles, etc. etc.
62 /* ioctl() calls that are permitted to the /dev/rtc interface. */
64 #define RTC_RD_TIME _IOR(RTC_MAGIC, 0x09, struct rtc_time) /* Read RTC time. */
65 #define RTC_SET_TIME _IOW(RTC_MAGIC, 0x0a, struct rtc_time) /* Set RTC time. */
66 #define RTC_SET_CHARGE _IOW(RTC_MAGIC, 0x0b, int)
67 #define RTC_MAX_IOCTL 0x0b
69 #endif /* __RTC_H__ */