1 /* 2 * (C) Copyright 2011 DENX Software Engineering GmbH 3 * Heiko Schocher <hs@denx.de> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 #include <common.h> 24 #include <command.h> 25 #include <rtc.h> 26 #include <asm/io.h> 27 #include <asm/arch/hardware.h> 28 29 #if defined(CONFIG_CMD_DATE) 30 int rtc_get(struct rtc_time *tmp) 31 { 32 struct davinci_rtc *rtc = davinci_rtc_base; 33 unsigned long sec, min, hour, mday, wday, mon_cent, year; 34 unsigned long status; 35 36 status = readl(&rtc->status); 37 if ((status & RTC_STATE_RUN) != RTC_STATE_RUN) { 38 printf("RTC doesn't run\n"); 39 return -1; 40 } 41 if ((status & RTC_STATE_BUSY) == RTC_STATE_BUSY) 42 udelay(20); 43 44 sec = readl(&rtc->second); 45 min = readl(&rtc->minutes); 46 hour = readl(&rtc->hours); 47 mday = readl(&rtc->day); 48 wday = readl(&rtc->dotw); 49 mon_cent = readl(&rtc->month); 50 year = readl(&rtc->year); 51 52 debug("Get RTC year: %02lx mon/cent: %02lx mday: %02lx wday: %02lx " 53 "hr: %02lx min: %02lx sec: %02lx\n", 54 year, mon_cent, mday, wday, 55 hour, min, sec); 56 57 tmp->tm_sec = bcd2bin(sec & 0x7F); 58 tmp->tm_min = bcd2bin(min & 0x7F); 59 tmp->tm_hour = bcd2bin(hour & 0x3F); 60 tmp->tm_mday = bcd2bin(mday & 0x3F); 61 tmp->tm_mon = bcd2bin(mon_cent & 0x1F); 62 tmp->tm_year = bcd2bin(year) + 2000; 63 tmp->tm_wday = bcd2bin(wday & 0x07); 64 tmp->tm_yday = 0; 65 tmp->tm_isdst = 0; 66 67 debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 68 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 69 tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 70 71 return 0; 72 } 73 74 int rtc_set(struct rtc_time *tmp) 75 { 76 struct davinci_rtc *rtc = davinci_rtc_base; 77 78 debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 79 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 80 tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 81 writel(bin2bcd(tmp->tm_year % 100), &rtc->year); 82 writel(bin2bcd(tmp->tm_mon), &rtc->month); 83 84 writel(bin2bcd(tmp->tm_wday), &rtc->dotw); 85 writel(bin2bcd(tmp->tm_mday), &rtc->day); 86 writel(bin2bcd(tmp->tm_hour), &rtc->hours); 87 writel(bin2bcd(tmp->tm_min), &rtc->minutes); 88 writel(bin2bcd(tmp->tm_sec), &rtc->second); 89 return 0; 90 } 91 92 void rtc_reset(void) 93 { 94 struct davinci_rtc *rtc = davinci_rtc_base; 95 96 /* run RTC counter */ 97 writel(0x01, &rtc->ctrl); 98 } 99 #endif 100