diff options
Diffstat (limited to 'rtc/pcf8563.c')
| -rw-r--r-- | rtc/pcf8563.c | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/rtc/pcf8563.c b/rtc/pcf8563.c deleted file mode 100644 index 2d73d5d..0000000 --- a/rtc/pcf8563.c +++ /dev/null @@ -1,144 +0,0 @@ -/* - * (C) Copyright 2001 - * Wolfgang Denk, DENX Software Engineering, wd@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 - */ - -/* - * Date & Time support for Philips PCF8563 RTC - */ - -/* #define DEBUG */ - -#include <common.h> -#include <command.h> -#include <rtc.h> -#include <i2c.h> - -#if defined(CONFIG_RTC_PCF8563) && defined(CONFIG_CMD_DATE) - -static uchar rtc_read (uchar reg); -static void rtc_write (uchar reg, uchar val); -static uchar bin2bcd (unsigned int n); -static unsigned bcd2bin(uchar c); - -/* ------------------------------------------------------------------------- */ - -void rtc_get (struct rtc_time *tmp) -{ - uchar sec, min, hour, mday, wday, mon_cent, year; - - sec = rtc_read (0x02); - min = rtc_read (0x03); - hour = rtc_read (0x04); - mday = rtc_read (0x05); - wday = rtc_read (0x06); - mon_cent= rtc_read (0x07); - year = rtc_read (0x08); - - debug ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x " - "hr: %02x min: %02x sec: %02x\n", - year, mon_cent, mday, wday, - hour, min, sec ); - debug ( "Alarms: wday: %02x day: %02x hour: %02x min: %02x\n", - rtc_read (0x0C), - rtc_read (0x0B), - rtc_read (0x0A), - rtc_read (0x09) ); - - if (sec & 0x80) { - puts ("### Warning: RTC Low Voltage - date/time not reliable\n"); - } - - tmp->tm_sec = bcd2bin (sec & 0x7F); - tmp->tm_min = bcd2bin (min & 0x7F); - tmp->tm_hour = bcd2bin (hour & 0x3F); - tmp->tm_mday = bcd2bin (mday & 0x3F); - tmp->tm_mon = bcd2bin (mon_cent & 0x1F); - tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 2000 : 1900); - tmp->tm_wday = bcd2bin (wday & 0x07); - tmp->tm_yday = 0; - tmp->tm_isdst= 0; - - debug ( "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); -} - -void rtc_set (struct rtc_time *tmp) -{ - uchar century; - - debug ( "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); - - rtc_write (0x08, bin2bcd(tmp->tm_year % 100)); - - century = (tmp->tm_year >= 2000) ? 0x80 : 0; - rtc_write (0x07, bin2bcd(tmp->tm_mon) | century); - - rtc_write (0x06, bin2bcd(tmp->tm_wday)); - rtc_write (0x05, bin2bcd(tmp->tm_mday)); - rtc_write (0x04, bin2bcd(tmp->tm_hour)); - rtc_write (0x03, bin2bcd(tmp->tm_min )); - rtc_write (0x02, bin2bcd(tmp->tm_sec )); -} - -void rtc_reset (void) -{ - /* clear all control & status registers */ - rtc_write (0x00, 0x00); - rtc_write (0x01, 0x00); - rtc_write (0x0D, 0x00); - - /* clear Voltage Low bit */ - rtc_write (0x02, rtc_read (0x02) & 0x7F); - - /* reset all alarms */ - rtc_write (0x09, 0x00); - rtc_write (0x0A, 0x00); - rtc_write (0x0B, 0x00); - rtc_write (0x0C, 0x00); -} - -/* ------------------------------------------------------------------------- */ - -static uchar rtc_read (uchar reg) -{ - return (i2c_reg_read (CFG_I2C_RTC_ADDR, reg)); -} - -static void rtc_write (uchar reg, uchar val) -{ - i2c_reg_write (CFG_I2C_RTC_ADDR, reg, val); -} - -static unsigned bcd2bin (uchar n) -{ - return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F)); -} - -static unsigned char bin2bcd (unsigned int n) -{ - return (((n / 10) << 4) | (n % 10)); -} - -#endif |