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