diff options
Diffstat (limited to 'rtc/mc146818.c')
| -rw-r--r-- | rtc/mc146818.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/rtc/mc146818.c b/rtc/mc146818.c deleted file mode 100644 index ab377ed..0000000 --- a/rtc/mc146818.c +++ /dev/null @@ -1,178 +0,0 @@ -/* - * (C) Copyright 2001 - * Denis Peter MPL AG Switzerland. d.peter@mpl.ch - * - * 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 the MC146818 (PIXX4) RTC - */ - -/*#define DEBUG*/ - -#include <common.h> -#include <command.h> -#include <rtc.h> - -#if defined(CONFIG_RTC_MC146818) && 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); - -#define RTC_PORT_MC146818 CFG_ISA_IO_BASE_ADDRESS + 0x70 -#define RTC_SECONDS 0x00 -#define RTC_SECONDS_ALARM 0x01 -#define RTC_MINUTES 0x02 -#define RTC_MINUTES_ALARM 0x03 -#define RTC_HOURS 0x04 -#define RTC_HOURS_ALARM 0x05 -#define RTC_DAY_OF_WEEK 0x06 -#define RTC_DATE_OF_MONTH 0x07 -#define RTC_MONTH 0x08 -#define RTC_YEAR 0x09 -#define RTC_CONFIG_A 0x0A -#define RTC_CONFIG_B 0x0B -#define RTC_CONFIG_C 0x0C -#define RTC_CONFIG_D 0x0D - - -/* ------------------------------------------------------------------------- */ - -void rtc_get (struct rtc_time *tmp) -{ - uchar sec, min, hour, mday, wday, mon, year; - /* here check if rtc can be accessed */ - while((rtc_read(RTC_CONFIG_A)&0x80)==0x80); - sec = rtc_read (RTC_SECONDS); - min = rtc_read (RTC_MINUTES); - hour = rtc_read (RTC_HOURS); - mday = rtc_read (RTC_DATE_OF_MONTH); - wday = rtc_read (RTC_DAY_OF_WEEK); - mon = rtc_read (RTC_MONTH); - year = rtc_read (RTC_YEAR); -#ifdef CONFIG_AMIGAONEG3SE - wday -= 1; /* VIA 686 stores Sunday = 1, Monday = 2, ... */ -#endif -#ifdef RTC_DEBUG - printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x " - "hr: %02x min: %02x sec: %02x\n", - year, mon, mday, wday, - hour, min, sec ); - printf ( "Alarms: month: %02x hour: %02x min: %02x sec: %02x\n", - rtc_read (RTC_CONFIG_D) & 0x3F, - rtc_read (RTC_HOURS_ALARM), - rtc_read (RTC_MINUTES_ALARM), - rtc_read (RTC_SECONDS_ALARM) ); -#endif - 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 & 0x1F); - tmp->tm_year = bcd2bin (year); - tmp->tm_wday = bcd2bin (wday & 0x07); - if(tmp->tm_year<70) - tmp->tm_year+=2000; - else - tmp->tm_year+=1900; - 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 -} - -void rtc_set (struct rtc_time *tmp) -{ -#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 - rtc_write(RTC_CONFIG_B,0x82); /* disables the RTC to update the regs */ - - rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100)); - rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon)); -#ifdef CONFIG_AMIGAONEG3SE - rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday)+1); -#else - rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday)); -#endif - rtc_write (RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday)); - rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour)); - rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min )); - rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec )); - rtc_write(RTC_CONFIG_B,0x02); /* enables the RTC to update the regs */ - -} - -void rtc_reset (void) -{ - rtc_write(RTC_CONFIG_B,0x82); /* disables the RTC to update the regs */ - rtc_write(RTC_CONFIG_A,0x20); /* Normal OP */ - rtc_write(RTC_CONFIG_B,0x00); - rtc_write(RTC_CONFIG_B,0x00); - rtc_write(RTC_CONFIG_B,0x02); /* enables the RTC to update the regs */ -} - -/* ------------------------------------------------------------------------- */ - -#ifdef CFG_RTC_REG_BASE_ADDR -/* - * use direct memory access - */ -static uchar rtc_read (uchar reg) -{ - return(in8(CFG_RTC_REG_BASE_ADDR+reg)); -} - -static void rtc_write (uchar reg, uchar val) -{ - out8(CFG_RTC_REG_BASE_ADDR+reg, val); -} -#else -static uchar rtc_read (uchar reg) -{ - out8(RTC_PORT_MC146818,reg); - return(in8(RTC_PORT_MC146818+1)); -} - -static void rtc_write (uchar reg, uchar val) -{ - out8(RTC_PORT_MC146818,reg); - out8(RTC_PORT_MC146818+1,val); -} -#endif - -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 |