diff options
Diffstat (limited to 'rtc/ds12887.c')
| -rw-r--r-- | rtc/ds12887.c | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/rtc/ds12887.c b/rtc/ds12887.c deleted file mode 100644 index 84fecf0..0000000 --- a/rtc/ds12887.c +++ /dev/null @@ -1,238 +0,0 @@ -/* - * (C) Copyright 2003 - * - * 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 DS12887 RTC - */ - -#undef RTC_DEBUG - -#include <common.h> -#include <command.h> -#include <config.h> -#include <rtc.h> - -#if defined(CONFIG_RTC_DS12887) && defined(CONFIG_CMD_DATE) - -#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_CONTROL_A 0x0A -#define RTC_CONTROL_B 0x0B -#define RTC_CONTROL_C 0x0C -#define RTC_CONTROL_D 0x0D - -#define RTC_CA_UIP 0x80 -#define RTC_CB_DM 0x04 -#define RTC_CB_24_12 0x02 -#define RTC_CB_SET 0x80 - -#if defined(CONFIG_ATC) - -static uchar rtc_read (uchar reg) -{ - uchar val; - - *(volatile unsigned char*)(RTC_PORT_ADDR) = reg; - __asm__ __volatile__ ("sync"); - - val = *(volatile unsigned char*)(RTC_PORT_DATA); - return (val); -} - -static void rtc_write (uchar reg, uchar val) -{ - *(volatile unsigned char*)(RTC_PORT_ADDR) = reg; - __asm__ __volatile__ ("sync"); - - *(volatile unsigned char*)(RTC_PORT_DATA) = val; - __asm__ __volatile__ ("sync"); -} - -#else -# error Board specific rtc access functions should be supplied -#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)); -} - -/* ------------------------------------------------------------------------- */ - -void rtc_get (struct rtc_time *tmp) -{ - uchar sec, min, hour, mday, wday, mon, year; - - /* check if rtc is available for access */ - while( rtc_read(RTC_CONTROL_A) & RTC_CA_UIP) - ; - - 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 RTC_DEBUG - printf( "Get RTC year: %d; mon: %d; mday: %d; wday: %d; " - "hr: %d; min: %d; sec: %d\n", - year, mon, mday, wday, hour, min, sec ); - - printf ( "Alarms: hour: %02x min: %02x sec: %02x\n", - rtc_read (RTC_HOURS_ALARM), - rtc_read (RTC_MINUTES_ALARM), - rtc_read (RTC_SECONDS_ALARM) ); -#endif - - if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM)) - { /* Information is in BCD format */ -printf(" Get: Convert BSD to BIN\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 & 0x1F); - tmp->tm_year = bcd2bin (year); - tmp->tm_wday = bcd2bin (wday & 0x07); - } -else - { - tmp->tm_sec = sec & 0x7F; - tmp->tm_min = min & 0x7F; - tmp->tm_hour = hour & 0x3F; - tmp->tm_mday = mday & 0x3F; - tmp->tm_mon = mon & 0x1F; - tmp->tm_year = year; - tmp->tm_wday = 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) -{ - uchar save_ctrl_b; - uchar sec, min, hour, mday, wday, mon, year; - -#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( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM)) - { /* Information is in BCD format */ - year = bin2bcd(tmp->tm_year % 100); - mon = bin2bcd(tmp->tm_mon); - wday = bin2bcd(tmp->tm_wday); - mday = bin2bcd(tmp->tm_mday); - hour = bin2bcd(tmp->tm_hour); - min = bin2bcd(tmp->tm_min); - sec = bin2bcd(tmp->tm_sec); - } - else - { - year = tmp->tm_year % 100; - mon = tmp->tm_mon; - wday = tmp->tm_wday; - mday = tmp->tm_mday; - hour = tmp->tm_hour; - min = tmp->tm_min; - sec = tmp->tm_sec; - } - - /* disables the RTC to update the regs */ - save_ctrl_b = rtc_read(RTC_CONTROL_B); - save_ctrl_b |= RTC_CB_SET; - rtc_write(RTC_CONTROL_B, save_ctrl_b); - - rtc_write (RTC_YEAR, year); - rtc_write (RTC_MONTH, mon); - rtc_write (RTC_DAY_OF_WEEK, wday); - rtc_write (RTC_DATE_OF_MONTH, mday); - rtc_write (RTC_HOURS, hour); - rtc_write (RTC_MINUTES, min); - rtc_write (RTC_SECONDS, sec); - - /* enables the RTC to update the regs */ - save_ctrl_b &= ~RTC_CB_SET; - rtc_write(RTC_CONTROL_B, save_ctrl_b); -} - -void rtc_reset (void) -{ - struct rtc_time tmp; - uchar ctrl_rg; - - ctrl_rg = RTC_CB_SET; - rtc_write(RTC_CONTROL_B,ctrl_rg); - - tmp.tm_year = 1970 % 100; - tmp.tm_mon = 1; - tmp.tm_mday= 1; - tmp.tm_hour = 0; - tmp.tm_min = 0; - tmp.tm_sec = 0; - -#ifdef RTC_DEBUG - printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n", - tmp.tm_year, tmp.tm_mon, tmp.tm_mday, - tmp.tm_hour, tmp.tm_min, tmp.tm_sec); -#endif - - ctrl_rg = RTC_CB_SET | RTC_CB_24_12 | RTC_CB_DM; - rtc_write(RTC_CONTROL_B,ctrl_rg); - rtc_set(&tmp); - - rtc_write(RTC_HOURS_ALARM, 0), - rtc_write(RTC_MINUTES_ALARM, 0), - rtc_write(RTC_SECONDS_ALARM, 0); - - ctrl_rg = RTC_CB_24_12 | RTC_CB_DM; - rtc_write(RTC_CONTROL_B,ctrl_rg); -} - -#endif |