| Jean-Christophe PLAGNIOL-VILLARD | 5fe1377 | 2009-03-29 23:01:40 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2004 |
| 3 | * DAVE Srl |
| 4 | * http://www.dave-tech.it |
| 5 | * http://www.wawnet.biz |
| 6 | * mailto:info@wawnet.biz |
| 7 | * |
| 8 | * See file CREDITS for list of people who contributed to this |
| 9 | * project. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; either version 2 of |
| 14 | * the License, or (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 24 | * MA 02111-1307 USA |
| 25 | */ |
| 26 | |
| 27 | /* |
| 28 | * S3C44B0 CPU specific code |
| 29 | */ |
| 30 | |
| 31 | #include <common.h> |
| 32 | #include <command.h> |
| 33 | #include <asm/hardware.h> |
| 34 | #include <rtc.h> |
| 35 | #include <bcd.h> |
| 36 | |
| 37 | int rtc_get (struct rtc_time* tm) |
| 38 | { |
| 39 | RTCCON |= 1; |
| 40 | tm->tm_year = BCD2BIN(BCDYEAR); |
| 41 | tm->tm_mon = BCD2BIN(BCDMON); |
| 42 | tm->tm_wday = BCD2BIN(BCDDATE); |
| 43 | tm->tm_mday = BCD2BIN(BCDDAY); |
| 44 | tm->tm_hour = BCD2BIN(BCDHOUR); |
| 45 | tm->tm_min = BCD2BIN(BCDMIN); |
| 46 | tm->tm_sec = BCD2BIN(BCDSEC); |
| 47 | |
| 48 | if (tm->tm_sec==0) { |
| 49 | /* we have to re-read the rtc data because of the "one second deviation" problem */ |
| 50 | /* see RTC datasheet for more info about it */ |
| 51 | tm->tm_year = BCD2BIN(BCDYEAR); |
| 52 | tm->tm_mon = BCD2BIN(BCDMON); |
| 53 | tm->tm_mday = BCD2BIN(BCDDAY); |
| 54 | tm->tm_wday = BCD2BIN(BCDDATE); |
| 55 | tm->tm_hour = BCD2BIN(BCDHOUR); |
| 56 | tm->tm_min = BCD2BIN(BCDMIN); |
| 57 | tm->tm_sec = BCD2BIN(BCDSEC); |
| 58 | } |
| 59 | |
| 60 | RTCCON &= ~1; |
| 61 | |
| 62 | if(tm->tm_year >= 70) |
| 63 | tm->tm_year += 1900; |
| 64 | else |
| 65 | tm->tm_year += 2000; |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | int rtc_set (struct rtc_time* tm) |
| 71 | { |
| 72 | if(tm->tm_year < 2000) |
| 73 | tm->tm_year -= 1900; |
| 74 | else |
| 75 | tm->tm_year -= 2000; |
| 76 | |
| 77 | RTCCON |= 1; |
| 78 | BCDYEAR = BIN2BCD(tm->tm_year); |
| 79 | BCDMON = BIN2BCD(tm->tm_mon); |
| 80 | BCDDAY = BIN2BCD(tm->tm_mday); |
| 81 | BCDDATE = BIN2BCD(tm->tm_wday); |
| 82 | BCDHOUR = BIN2BCD(tm->tm_hour); |
| 83 | BCDMIN = BIN2BCD(tm->tm_min); |
| 84 | BCDSEC = BIN2BCD(tm->tm_sec); |
| 85 | RTCCON &= 1; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | void rtc_reset (void) |
| 91 | { |
| 92 | RTCCON |= 1; |
| 93 | BCDYEAR = 0; |
| 94 | BCDMON = 0; |
| 95 | BCDDAY = 0; |
| 96 | BCDDATE = 0; |
| 97 | BCDHOUR = 0; |
| 98 | BCDMIN = 0; |
| 99 | BCDSEC = 0; |
| 100 | RTCCON &= 1; |
| 101 | } |
| 102 | |