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 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 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 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