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 struct davinci_rtc { 31 u_int32_t second; 32 u_int32_t minutes; 33 u_int32_t hours; 34 u_int32_t day; 35 u_int32_t month; /* 0x10 */ 36 u_int32_t year; 37 u_int32_t dotw; 38 u_int32_t resv1; 39 u_int32_t alarmsecond; /* 0x20 */ 40 u_int32_t alarmminute; 41 u_int32_t alarmhour; 42 u_int32_t alarmday; 43 u_int32_t alarmmonth; /* 0x30 */ 44 u_int32_t alarmyear; 45 u_int32_t resv2[2]; 46 u_int32_t ctrl; /* 0x40 */ 47 u_int32_t status; 48 u_int32_t irq; 49 }; 50 51 #define RTC_STATE_BUSY 0x01 52 #define RTC_STATE_RUN 0x02 53 54 #define davinci_rtc_base ((struct davinci_rtc *)DAVINCI_RTC_BASE) 55 56 int rtc_get(struct rtc_time *tmp) 57 { 58 struct davinci_rtc *rtc = davinci_rtc_base; 59 unsigned long sec, min, hour, mday, wday, mon_cent, year; 60 unsigned long status; 61 62 status = readl(&rtc->status); 63 if ((status & RTC_STATE_RUN) != RTC_STATE_RUN) { 64 printf("RTC doesn't run\n"); 65 return -1; 66 } 67 if ((status & RTC_STATE_BUSY) == RTC_STATE_BUSY) 68 udelay(20); 69 70 sec = readl(&rtc->second); 71 min = readl(&rtc->minutes); 72 hour = readl(&rtc->hours); 73 mday = readl(&rtc->day); 74 wday = readl(&rtc->dotw); 75 mon_cent = readl(&rtc->month); 76 year = readl(&rtc->year); 77 78 debug("Get RTC year: %02lx mon/cent: %02lx mday: %02lx wday: %02lx " 79 "hr: %02lx min: %02lx sec: %02lx\n", 80 year, mon_cent, mday, wday, 81 hour, min, sec); 82 83 tmp->tm_sec = bcd2bin(sec & 0x7F); 84 tmp->tm_min = bcd2bin(min & 0x7F); 85 tmp->tm_hour = bcd2bin(hour & 0x3F); 86 tmp->tm_mday = bcd2bin(mday & 0x3F); 87 tmp->tm_mon = bcd2bin(mon_cent & 0x1F); 88 tmp->tm_year = bcd2bin(year) + 2000; 89 tmp->tm_wday = bcd2bin(wday & 0x07); 90 tmp->tm_yday = 0; 91 tmp->tm_isdst = 0; 92 93 debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 94 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 95 tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 96 97 return 0; 98 } 99 100 int rtc_set(struct rtc_time *tmp) 101 { 102 struct davinci_rtc *rtc = davinci_rtc_base; 103 104 debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 105 tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 106 tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 107 writel(bin2bcd(tmp->tm_year % 100), &rtc->year); 108 writel(bin2bcd(tmp->tm_mon), &rtc->month); 109 110 writel(bin2bcd(tmp->tm_wday), &rtc->dotw); 111 writel(bin2bcd(tmp->tm_mday), &rtc->day); 112 writel(bin2bcd(tmp->tm_hour), &rtc->hours); 113 writel(bin2bcd(tmp->tm_min), &rtc->minutes); 114 writel(bin2bcd(tmp->tm_sec), &rtc->second); 115 return 0; 116 } 117 118 void rtc_reset(void) 119 { 120 struct davinci_rtc *rtc = davinci_rtc_base; 121 122 /* run RTC counter */ 123 writel(0x01, &rtc->ctrl); 124 } 125 #endif 126