diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/s3c44b0_rtc.c | 102 |
2 files changed, 103 insertions, 0 deletions
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 94bc518..3831dd9 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -57,6 +57,7 @@ COBJS-$(CONFIG_RTC_PL031) += pl031.o COBJS-$(CONFIG_RTC_RS5C372A) += rs5c372.o COBJS-$(CONFIG_RTC_RX8025) += rx8025.o COBJS-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o +COBJS-$(CONFIG_RTC_S3C44B0) += s3c44b0_rtc.o COBJS-$(CONFIG_RTC_X1205) += x1205.o COBJS := $(sort $(COBJS-y)) diff --git a/drivers/rtc/s3c44b0_rtc.c b/drivers/rtc/s3c44b0_rtc.c new file mode 100644 index 0000000..489536f --- /dev/null +++ b/drivers/rtc/s3c44b0_rtc.c @@ -0,0 +1,102 @@ +/* + * (C) Copyright 2004 + * DAVE Srl + * http://www.dave-tech.it + * http://www.wawnet.biz + * mailto:info@wawnet.biz + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * S3C44B0 CPU specific code + */ + +#include <common.h> +#include <command.h> +#include <asm/hardware.h> +#include <rtc.h> +#include <bcd.h> + +int rtc_get (struct rtc_time* tm) +{ + RTCCON |= 1; + tm->tm_year = BCD2BIN(BCDYEAR); + tm->tm_mon = BCD2BIN(BCDMON); + tm->tm_wday = BCD2BIN(BCDDATE); + tm->tm_mday = BCD2BIN(BCDDAY); + tm->tm_hour = BCD2BIN(BCDHOUR); + tm->tm_min = BCD2BIN(BCDMIN); + tm->tm_sec = BCD2BIN(BCDSEC); + + if (tm->tm_sec==0) { + /* we have to re-read the rtc data because of the "one second deviation" problem */ + /* see RTC datasheet for more info about it */ + tm->tm_year = BCD2BIN(BCDYEAR); + tm->tm_mon = BCD2BIN(BCDMON); + tm->tm_mday = BCD2BIN(BCDDAY); + tm->tm_wday = BCD2BIN(BCDDATE); + tm->tm_hour = BCD2BIN(BCDHOUR); + tm->tm_min = BCD2BIN(BCDMIN); + tm->tm_sec = BCD2BIN(BCDSEC); + } + + RTCCON &= ~1; + + if(tm->tm_year >= 70) + tm->tm_year += 1900; + else + tm->tm_year += 2000; + + return 0; +} + +int rtc_set (struct rtc_time* tm) +{ + if(tm->tm_year < 2000) + tm->tm_year -= 1900; + else + tm->tm_year -= 2000; + + RTCCON |= 1; + BCDYEAR = BIN2BCD(tm->tm_year); + BCDMON = BIN2BCD(tm->tm_mon); + BCDDAY = BIN2BCD(tm->tm_mday); + BCDDATE = BIN2BCD(tm->tm_wday); + BCDHOUR = BIN2BCD(tm->tm_hour); + BCDMIN = BIN2BCD(tm->tm_min); + BCDSEC = BIN2BCD(tm->tm_sec); + RTCCON &= 1; + + return 0; +} + +void rtc_reset (void) +{ + RTCCON |= 1; + BCDYEAR = 0; + BCDMON = 0; + BCDDAY = 0; + BCDDATE = 0; + BCDHOUR = 0; + BCDMIN = 0; + BCDSEC = 0; + RTCCON &= 1; +} + |