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