1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2011 DENX Software Engineering GmbH
4 * Heiko Schocher <hs@denx.de>
5 */
6 #include <common.h>
7 #include <command.h>
8 #include <rtc.h>
9 #include <asm/io.h>
10 #include <asm/davinci_rtc.h>
11
rtc_get(struct rtc_time * tmp)12 int rtc_get(struct rtc_time *tmp)
13 {
14 struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
15 unsigned long sec, min, hour, mday, wday, mon_cent, year;
16 unsigned long status;
17
18 status = readl(&rtc->status);
19 if ((status & RTC_STATE_RUN) != RTC_STATE_RUN) {
20 printf("RTC doesn't run\n");
21 return -1;
22 }
23 if ((status & RTC_STATE_BUSY) == RTC_STATE_BUSY)
24 udelay(20);
25
26 sec = readl(&rtc->second);
27 min = readl(&rtc->minutes);
28 hour = readl(&rtc->hours);
29 mday = readl(&rtc->day);
30 wday = readl(&rtc->dotw);
31 mon_cent = readl(&rtc->month);
32 year = readl(&rtc->year);
33
34 debug("Get RTC year: %02lx mon/cent: %02lx mday: %02lx wday: %02lx "
35 "hr: %02lx min: %02lx sec: %02lx\n",
36 year, mon_cent, mday, wday,
37 hour, min, sec);
38
39 tmp->tm_sec = bcd2bin(sec & 0x7F);
40 tmp->tm_min = bcd2bin(min & 0x7F);
41 tmp->tm_hour = bcd2bin(hour & 0x3F);
42 tmp->tm_mday = bcd2bin(mday & 0x3F);
43 tmp->tm_mon = bcd2bin(mon_cent & 0x1F);
44 tmp->tm_year = bcd2bin(year) + 2000;
45 tmp->tm_wday = bcd2bin(wday & 0x07);
46 tmp->tm_yday = 0;
47 tmp->tm_isdst = 0;
48
49 debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
50 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
51 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
52
53 return 0;
54 }
55
rtc_set(struct rtc_time * tmp)56 int rtc_set(struct rtc_time *tmp)
57 {
58 struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
59
60 debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
61 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
62 tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
63 writel(bin2bcd(tmp->tm_year % 100), &rtc->year);
64 writel(bin2bcd(tmp->tm_mon), &rtc->month);
65
66 writel(bin2bcd(tmp->tm_wday), &rtc->dotw);
67 writel(bin2bcd(tmp->tm_mday), &rtc->day);
68 writel(bin2bcd(tmp->tm_hour), &rtc->hours);
69 writel(bin2bcd(tmp->tm_min), &rtc->minutes);
70 writel(bin2bcd(tmp->tm_sec), &rtc->second);
71 return 0;
72 }
73
rtc_reset(void)74 void rtc_reset(void)
75 {
76 struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
77
78 /* run RTC counter */
79 writel(0x01, &rtc->ctrl);
80 }
81