1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2011 DENX Software Engineering GmbH
3*4882a593Smuzhiyun * Heiko Schocher <hs@denx.de>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <command.h>
9*4882a593Smuzhiyun #include <rtc.h>
10*4882a593Smuzhiyun #include <asm/io.h>
11*4882a593Smuzhiyun #include <asm/davinci_rtc.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #if defined(CONFIG_CMD_DATE)
rtc_get(struct rtc_time * tmp)14*4882a593Smuzhiyun int rtc_get(struct rtc_time *tmp)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
17*4882a593Smuzhiyun unsigned long sec, min, hour, mday, wday, mon_cent, year;
18*4882a593Smuzhiyun unsigned long status;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun status = readl(&rtc->status);
21*4882a593Smuzhiyun if ((status & RTC_STATE_RUN) != RTC_STATE_RUN) {
22*4882a593Smuzhiyun printf("RTC doesn't run\n");
23*4882a593Smuzhiyun return -1;
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun if ((status & RTC_STATE_BUSY) == RTC_STATE_BUSY)
26*4882a593Smuzhiyun udelay(20);
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun sec = readl(&rtc->second);
29*4882a593Smuzhiyun min = readl(&rtc->minutes);
30*4882a593Smuzhiyun hour = readl(&rtc->hours);
31*4882a593Smuzhiyun mday = readl(&rtc->day);
32*4882a593Smuzhiyun wday = readl(&rtc->dotw);
33*4882a593Smuzhiyun mon_cent = readl(&rtc->month);
34*4882a593Smuzhiyun year = readl(&rtc->year);
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun debug("Get RTC year: %02lx mon/cent: %02lx mday: %02lx wday: %02lx "
37*4882a593Smuzhiyun "hr: %02lx min: %02lx sec: %02lx\n",
38*4882a593Smuzhiyun year, mon_cent, mday, wday,
39*4882a593Smuzhiyun hour, min, sec);
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun tmp->tm_sec = bcd2bin(sec & 0x7F);
42*4882a593Smuzhiyun tmp->tm_min = bcd2bin(min & 0x7F);
43*4882a593Smuzhiyun tmp->tm_hour = bcd2bin(hour & 0x3F);
44*4882a593Smuzhiyun tmp->tm_mday = bcd2bin(mday & 0x3F);
45*4882a593Smuzhiyun tmp->tm_mon = bcd2bin(mon_cent & 0x1F);
46*4882a593Smuzhiyun tmp->tm_year = bcd2bin(year) + 2000;
47*4882a593Smuzhiyun tmp->tm_wday = bcd2bin(wday & 0x07);
48*4882a593Smuzhiyun tmp->tm_yday = 0;
49*4882a593Smuzhiyun tmp->tm_isdst = 0;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
52*4882a593Smuzhiyun tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
53*4882a593Smuzhiyun tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun return 0;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
rtc_set(struct rtc_time * tmp)58*4882a593Smuzhiyun int rtc_set(struct rtc_time *tmp)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
63*4882a593Smuzhiyun tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
64*4882a593Smuzhiyun tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
65*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_year % 100), &rtc->year);
66*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_mon), &rtc->month);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_wday), &rtc->dotw);
69*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_mday), &rtc->day);
70*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_hour), &rtc->hours);
71*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_min), &rtc->minutes);
72*4882a593Smuzhiyun writel(bin2bcd(tmp->tm_sec), &rtc->second);
73*4882a593Smuzhiyun return 0;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
rtc_reset(void)76*4882a593Smuzhiyun void rtc_reset(void)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun /* run RTC counter */
81*4882a593Smuzhiyun writel(0x01, &rtc->ctrl);
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun #endif
84