+++ /dev/null
-/*
- * (C) Copyright 2002
- * Andrew May, Viasat Inc, amay@viasat.com
- *
- * 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
- */
-
-/*
- * M41T11 Serial Access Timekeeper(R) SRAM
- * can you believe a trademark on that?
- */
-
-/* #define DEBUG 1 */
-
-#include <common.h>
-#include <command.h>
-#include <rtc.h>
-#include <i2c.h>
-
-/*
- I Don't have an example config file but this
- is what should be done.
-
-#define CONFIG_RTC_M41T11 1
-#define CFG_I2C_RTC_ADDR 0x68
-#if 0
-#define CFG_M41T11_EXT_CENTURY_DATA
-#else
-#define CFG_M41T11_BASE_YEAR 2000
-#endif
-*/
-
-#if defined(CONFIG_RTC_M41T11) && defined(CFG_I2C_RTC_ADDR) && defined(CONFIG_CMD_DATE)
-
-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));
-}
-
-
-/* ------------------------------------------------------------------------- */
-/*
- these are simple defines for the chip local to here so they aren't too
- verbose
- DAY/DATE aren't nice but that is how they are on the data sheet
-*/
-#define RTC_SEC_ADDR 0x0
-#define RTC_MIN_ADDR 0x1
-#define RTC_HOUR_ADDR 0x2
-#define RTC_DAY_ADDR 0x3
-#define RTC_DATE_ADDR 0x4
-#define RTC_MONTH_ADDR 0x5
-#define RTC_YEARS_ADDR 0x6
-
-#define RTC_REG_CNT 7
-
-#define RTC_CONTROL_ADDR 0x7
-
-
-#ifndef CFG_M41T11_EXT_CENTURY_DATA
-
-#define REG_CNT (RTC_REG_CNT+1)
-
-/*
- you only get 00-99 for the year we will asume you
- want from the year 2000 if you don't set the config
-*/
-#ifndef CFG_M41T11_BASE_YEAR
-#define CFG_M41T11_BASE_YEAR 2000
-#endif
-
-#else
-/* we will store extra year info in byte 9*/
-#define M41T11_YEAR_DATA 0x8
-#define M41T11_YEAR_SIZE 1
-#define REG_CNT (RTC_REG_CNT+1+M41T11_YEAR_SIZE)
-#endif
-
-#define M41T11_STORAGE_SZ (64-REG_CNT)
-
-void rtc_get (struct rtc_time *tmp)
-{
- uchar data[RTC_REG_CNT];
-
- i2c_read(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT);
-
- if( data[RTC_SEC_ADDR] & 0x80 ){
- printf( "m41t11 RTC Clock stopped!!!\n" );
- }
- tmp->tm_sec = bcd2bin (data[RTC_SEC_ADDR] & 0x7F);
- tmp->tm_min = bcd2bin (data[RTC_MIN_ADDR] & 0x7F);
- tmp->tm_hour = bcd2bin (data[RTC_HOUR_ADDR] & 0x3F);
- tmp->tm_mday = bcd2bin (data[RTC_DATE_ADDR] & 0x3F);
- tmp->tm_mon = bcd2bin (data[RTC_MONTH_ADDR]& 0x1F);
-#ifndef CFG_M41T11_EXT_CENTURY_DATA
- tmp->tm_year = CFG_M41T11_BASE_YEAR
- + bcd2bin(data[RTC_YEARS_ADDR])
- + ((data[RTC_HOUR_ADDR]&0x40) ? 100 : 0);
-#else
- {
- unsigned char cent;
- i2c_read(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE);
- if( !(data[RTC_HOUR_ADDR] & 0x80) ){
- printf( "m41t11 RTC: cann't keep track of years without CEB set\n" );
- }
- if( (cent & 0x1) != ((data[RTC_HOUR_ADDR]&0x40)>>7) ){
- /*century flip store off new year*/
- cent += 1;
- i2c_write(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE);
- }
- tmp->tm_year =((int)cent*100)+bcd2bin(data[RTC_YEARS_ADDR]);
- }
-#endif
- tmp->tm_wday = bcd2bin (data[RTC_DAY_ADDR] & 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 data[RTC_REG_CNT];
-
- 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);
-
- data[RTC_SEC_ADDR] = bin2bcd(tmp->tm_sec) & 0x7F;/*just in case*/
- data[RTC_MIN_ADDR] = bin2bcd(tmp->tm_min);
- data[RTC_HOUR_ADDR] = bin2bcd(tmp->tm_hour) & 0x3F;/*handle cent stuff later*/
- data[RTC_DATE_ADDR] = bin2bcd(tmp->tm_mday) & 0x3F;
- data[RTC_MONTH_ADDR] = bin2bcd(tmp->tm_mon);
- data[RTC_DAY_ADDR] = bin2bcd(tmp->tm_wday) & 0x07;
-
- data[RTC_HOUR_ADDR] |= 0x80;/*we will always use CEB*/
-
- data[RTC_YEARS_ADDR] = bin2bcd(tmp->tm_year%100);/*same thing either way*/
-#ifndef CFG_M41T11_EXT_CENTURY_DATA
- if( ((tmp->tm_year - CFG_M41T11_BASE_YEAR) > 200) ||
- (tmp->tm_year < CFG_M41T11_BASE_YEAR) ){
- printf( "m41t11 RTC setting year out of range!!need recompile\n" );
- }
- data[RTC_HOUR_ADDR] |= (tmp->tm_year - CFG_M41T11_BASE_YEAR) > 100 ? 0x40 : 0;
-#else
- {
- unsigned char cent;
- cent = tmp->tm_year ? tmp->tm_year / 100 : 0;
- data[RTC_HOUR_ADDR] |= (cent & 0x1) ? 0x40 : 0;
- i2c_write(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE);
- }
-#endif
- i2c_write(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT);
-}
-
-void rtc_reset (void)
-{
- unsigned char val;
- /* clear all control & status registers */
- i2c_read(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, &val, 1);
- val = val & 0x7F;/*make sure we are running*/
- i2c_write(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, &val, RTC_REG_CNT);
-
- i2c_read(CFG_I2C_RTC_ADDR, RTC_CONTROL_ADDR, 1, &val, 1);
- val = val & 0x3F;/*turn off freq test keep calibration*/
- i2c_write(CFG_I2C_RTC_ADDR, RTC_CONTROL_ADDR, 1, &val, 1);
-}
-
-int rtc_store(int addr, unsigned char* data, int size)
-{
- /*don't let things wrap onto the time on a write*/
- if( (addr+size) >= M41T11_STORAGE_SZ )
- return 1;
- return i2c_write( CFG_I2C_RTC_ADDR, REG_CNT+addr, 1, data, size );
-}
-
-int rtc_recall(int addr, unsigned char* data, int size)
-{
- return i2c_read( CFG_I2C_RTC_ADDR, REG_CNT+addr, 1, data, size );
-}
-
-#endif
projects / karo-tx-uboot.git / blobdiff