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Diffstat (limited to 'rtc/m48t35ax.c')
| -rw-r--r-- | rtc/m48t35ax.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/rtc/m48t35ax.c b/rtc/m48t35ax.c deleted file mode 100644 index 0a0ffa8..0000000 --- a/rtc/m48t35ax.c +++ /dev/null @@ -1,166 +0,0 @@ -/* - * (C) Copyright 2001 - * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. - * - * 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 ST Electronics M48T35Ax RTC - */ - -/*#define DEBUG */ - - -#include <common.h> -#include <command.h> -#include <rtc.h> -#include <config.h> - -#if defined(CONFIG_RTC_M48T35A) && 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, cent_day, date, month, year; - uchar ccr; /* Clock control register */ - - /* Lock RTC for read using clock control register */ - ccr = rtc_read(0); - ccr = ccr | 0x40; - rtc_write(0, ccr); - - sec = rtc_read (0x1); - min = rtc_read (0x2); - hour = rtc_read (0x3); - cent_day= rtc_read (0x4); - date = rtc_read (0x5); - month = rtc_read (0x6); - year = rtc_read (0x7); - - /* UNLock RTC */ - ccr = rtc_read(0); - ccr = ccr & 0xBF; - rtc_write(0, ccr); - - debug ( "Get RTC year: %02x month: %02x date: %02x cent_day: %02x " - "hr: %02x min: %02x sec: %02x\n", - year, month, date, cent_day, - hour, min, sec ); - - tmp->tm_sec = bcd2bin (sec & 0x7F); - tmp->tm_min = bcd2bin (min & 0x7F); - tmp->tm_hour = bcd2bin (hour & 0x3F); - tmp->tm_mday = bcd2bin (date & 0x3F); - tmp->tm_mon = bcd2bin (month & 0x1F); - tmp->tm_year = bcd2bin (year) + ((cent_day & 0x10) ? 2000 : 1900); - tmp->tm_wday = bcd2bin (cent_day & 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 ccr; /* Clock control register */ - 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); - - /* Lock RTC for write using clock control register */ - ccr = rtc_read(0); - ccr = ccr | 0x80; - rtc_write(0, ccr); - - rtc_write (0x07, bin2bcd(tmp->tm_year % 100)); - rtc_write (0x06, bin2bcd(tmp->tm_mon)); - rtc_write (0x05, bin2bcd(tmp->tm_mday)); - - century = ((tmp->tm_year >= 2000) ? 0x10 : 0) | 0x20; - rtc_write (0x04, bin2bcd(tmp->tm_wday) | century); - - rtc_write (0x03, bin2bcd(tmp->tm_hour)); - rtc_write (0x02, bin2bcd(tmp->tm_min )); - rtc_write (0x01, bin2bcd(tmp->tm_sec )); - - /* UNLock RTC */ - ccr = rtc_read(0); - ccr = ccr & 0x7F; - rtc_write(0, ccr); -} - -void rtc_reset (void) -{ - uchar val; - - /* Clear all clock control registers */ - rtc_write (0x0, 0x80); /* No Read Lock or calibration */ - - /* Clear stop bit */ - val = rtc_read (0x1); - val &= 0x7f; - rtc_write(0x1, val); - - /* Enable century / disable frequency test */ - val = rtc_read (0x4); - val = (val & 0xBF) | 0x20; - rtc_write(0x4, val); - - /* Clear write lock */ - rtc_write(0x0, 0); -} - -/* ------------------------------------------------------------------------- */ - -static uchar rtc_read (uchar reg) -{ - uchar val; - val = *(unsigned char *) - ((CFG_NVRAM_BASE_ADDR + CFG_NVRAM_SIZE - 8) + reg); - return val; -} - -static void rtc_write (uchar reg, uchar val) -{ - *(unsigned char *) - ((CFG_NVRAM_BASE_ADDR + CFG_NVRAM_SIZE - 8) + 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 |