/* * (C) Copyright 2010 * Heiko Schocher, DENX Software Engineering, hs@denx.de * * 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 */ #include <common.h> #include <command.h> #include <i2c.h> #include <rtc.h> #define RTC_RV3029_CTRL_RESET 0x04 #define RTC_RV3029_CTRL_SYS_R (1 << 4) #define RTC_RV3029_CLOCK_PAGE 0x08 #define RTC_RV3029_PAGE_LEN 7 #define RV3029C2_W_SECONDS 0x00 #define RV3029C2_W_MINUTES 0x01 #define RV3029C2_W_HOURS 0x02 #define RV3029C2_W_DATE 0x03 #define RV3029C2_W_DAYS 0x04 #define RV3029C2_W_MONTHS 0x05 #define RV3029C2_W_YEARS 0x06 #define RV3029C2_REG_HR_12_24 (1 << 6) /* 24h/12h mode */ #define RV3029C2_REG_HR_PM (1 << 5) /* PM/AM bit in 12h mode */ int rtc_get( struct rtc_time *tmp ) { int ret; unsigned char buf[RTC_RV3029_PAGE_LEN]; ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, \ RTC_RV3029_PAGE_LEN); if (ret) { printf("%s: error reading RTC: %x\n", __func__, ret); return -1; } tmp->tm_sec = bcd2bin( buf[RV3029C2_W_SECONDS] & 0x7f); tmp->tm_min = bcd2bin( buf[RV3029C2_W_MINUTES] & 0x7f); if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_12_24) { /* 12h format */ tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x1f); if (buf[RV3029C2_W_HOURS] & RV3029C2_REG_HR_PM) /* PM flag set */ tmp->tm_hour += 12; } else tmp->tm_hour = bcd2bin(buf[RV3029C2_W_HOURS] & 0x3f); tmp->tm_mday = bcd2bin( buf[RV3029C2_W_DATE] & 0x3F ); tmp->tm_mon = bcd2bin( buf[RV3029C2_W_MONTHS] & 0x1F ); tmp->tm_wday = bcd2bin( buf[RV3029C2_W_DAYS] & 0x07 ); /* RTC supports only years > 1999 */ tmp->tm_year = bcd2bin( buf[RV3029C2_W_YEARS]) + 2000; tmp->tm_yday = 0; tmp->tm_isdst = 0; #ifdef RTC_DEBUG printf( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, tmp->tm_hour, tmp->tm_min, tmp->tm_sec ); #endif return 0; } int rtc_set( struct rtc_time *tmp ) { int ret; unsigned char buf[RTC_RV3029_PAGE_LEN]; #ifdef RTC_DEBUG printf( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, tmp->tm_hour, tmp->tm_min, tmp->tm_sec); #endif if (tmp->tm_year < 2000) { printf("RTC: year %d < 2000 not possible\n", tmp->tm_year); return -1; } buf[RV3029C2_W_SECONDS] = bin2bcd(tmp->tm_sec); buf[RV3029C2_W_MINUTES] = bin2bcd(tmp->tm_min); buf[RV3029C2_W_HOURS] = bin2bcd(tmp->tm_hour); /* set 24h format */ buf[RV3029C2_W_HOURS] &= ~RV3029C2_REG_HR_12_24; buf[RV3029C2_W_DATE] = bin2bcd(tmp->tm_mday); buf[RV3029C2_W_DAYS] = bin2bcd(tmp->tm_wday); buf[RV3029C2_W_MONTHS] = bin2bcd(tmp->tm_mon); tmp->tm_year -= 2000; buf[RV3029C2_W_YEARS] = bin2bcd(tmp->tm_year); ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CLOCK_PAGE, 1, buf, RTC_RV3029_PAGE_LEN); /* give the RTC some time to update */ udelay(1000); return 0; } void rtc_reset (void) { int ret; unsigned char buf[RTC_RV3029_PAGE_LEN]; buf[0] = RTC_RV3029_CTRL_SYS_R; ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_RV3029_CTRL_RESET, 1, buf, 1); }