1*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 2*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * (C) Copyright 2002 3*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * Andrew May, Viasat Inc, amay@viasat.com 4*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * 5*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * This program is free software; you can redistribute it and/or 6*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * modify it under the terms of the GNU General Public License as 7*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * published by the Free Software Foundation; either version 2 of 8*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * the License, or (at your option) any later version. 9*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * 10*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * This program is distributed in the hope that it will be useful, 11*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * but WITHOUT ANY WARRANTY; without even the implied warranty of 12*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * GNU General Public License for more details. 14*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * 15*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * You should have received a copy of the GNU General Public License 16*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * along with this program; if not, write to the Free Software 17*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 18*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * MA 02111-1307 USA 19*0c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 20*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 21*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 22*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * M41T11 Serial Access Timekeeper(R) SRAM 23*0c698dcaSJean-Christophe PLAGNIOL-VILLARD * can you believe a trademark on that? 24*0c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 25*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 26*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* #define DEBUG 1 */ 27*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 28*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <common.h> 29*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <command.h> 30*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <rtc.h> 31*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <i2c.h> 32*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 33*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 34*0c698dcaSJean-Christophe PLAGNIOL-VILLARD I Don't have an example config file but this 35*0c698dcaSJean-Christophe PLAGNIOL-VILLARD is what should be done. 36*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 37*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_RTC_M41T11 1 38*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define CFG_I2C_RTC_ADDR 0x68 39*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #if 0 40*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define CFG_M41T11_EXT_CENTURY_DATA 41*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 42*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define CFG_M41T11_BASE_YEAR 2000 43*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 44*0c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 45*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 46*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #if defined(CONFIG_RTC_M41T11) && defined(CFG_I2C_RTC_ADDR) && defined(CONFIG_CMD_DATE) 47*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 48*0c698dcaSJean-Christophe PLAGNIOL-VILLARD static unsigned bcd2bin (uchar n) 49*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 50*0c698dcaSJean-Christophe PLAGNIOL-VILLARD return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F)); 51*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 52*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 53*0c698dcaSJean-Christophe PLAGNIOL-VILLARD static unsigned char bin2bcd (unsigned int n) 54*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 55*0c698dcaSJean-Christophe PLAGNIOL-VILLARD return (((n / 10) << 4) | (n % 10)); 56*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 57*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 58*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 59*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* ------------------------------------------------------------------------- */ 60*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 61*0c698dcaSJean-Christophe PLAGNIOL-VILLARD these are simple defines for the chip local to here so they aren't too 62*0c698dcaSJean-Christophe PLAGNIOL-VILLARD verbose 63*0c698dcaSJean-Christophe PLAGNIOL-VILLARD DAY/DATE aren't nice but that is how they are on the data sheet 64*0c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 65*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_SEC_ADDR 0x0 66*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_MIN_ADDR 0x1 67*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_HOUR_ADDR 0x2 68*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_DAY_ADDR 0x3 69*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_DATE_ADDR 0x4 70*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_MONTH_ADDR 0x5 71*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_YEARS_ADDR 0x6 72*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 73*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_REG_CNT 7 74*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 75*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_CONTROL_ADDR 0x7 76*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 77*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 78*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #ifndef CFG_M41T11_EXT_CENTURY_DATA 79*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 80*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define REG_CNT (RTC_REG_CNT+1) 81*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 82*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 83*0c698dcaSJean-Christophe PLAGNIOL-VILLARD you only get 00-99 for the year we will asume you 84*0c698dcaSJean-Christophe PLAGNIOL-VILLARD want from the year 2000 if you don't set the config 85*0c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 86*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #ifndef CFG_M41T11_BASE_YEAR 87*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define CFG_M41T11_BASE_YEAR 2000 88*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 89*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 90*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 91*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* we will store extra year info in byte 9*/ 92*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define M41T11_YEAR_DATA 0x8 93*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define M41T11_YEAR_SIZE 1 94*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define REG_CNT (RTC_REG_CNT+1+M41T11_YEAR_SIZE) 95*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 96*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 97*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #define M41T11_STORAGE_SZ (64-REG_CNT) 98*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 99*0c698dcaSJean-Christophe PLAGNIOL-VILLARD void rtc_get (struct rtc_time *tmp) 100*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 101*0c698dcaSJean-Christophe PLAGNIOL-VILLARD uchar data[RTC_REG_CNT]; 102*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 103*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_read(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT); 104*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 105*0c698dcaSJean-Christophe PLAGNIOL-VILLARD if( data[RTC_SEC_ADDR] & 0x80 ){ 106*0c698dcaSJean-Christophe PLAGNIOL-VILLARD printf( "m41t11 RTC Clock stopped!!!\n" ); 107*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 108*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_sec = bcd2bin (data[RTC_SEC_ADDR] & 0x7F); 109*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_min = bcd2bin (data[RTC_MIN_ADDR] & 0x7F); 110*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_hour = bcd2bin (data[RTC_HOUR_ADDR] & 0x3F); 111*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_mday = bcd2bin (data[RTC_DATE_ADDR] & 0x3F); 112*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_mon = bcd2bin (data[RTC_MONTH_ADDR]& 0x1F); 113*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #ifndef CFG_M41T11_EXT_CENTURY_DATA 114*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year = CFG_M41T11_BASE_YEAR 115*0c698dcaSJean-Christophe PLAGNIOL-VILLARD + bcd2bin(data[RTC_YEARS_ADDR]) 116*0c698dcaSJean-Christophe PLAGNIOL-VILLARD + ((data[RTC_HOUR_ADDR]&0x40) ? 100 : 0); 117*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 118*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 119*0c698dcaSJean-Christophe PLAGNIOL-VILLARD unsigned char cent; 120*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_read(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE); 121*0c698dcaSJean-Christophe PLAGNIOL-VILLARD if( !(data[RTC_HOUR_ADDR] & 0x80) ){ 122*0c698dcaSJean-Christophe PLAGNIOL-VILLARD printf( "m41t11 RTC: cann't keep track of years without CEB set\n" ); 123*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 124*0c698dcaSJean-Christophe PLAGNIOL-VILLARD if( (cent & 0x1) != ((data[RTC_HOUR_ADDR]&0x40)>>7) ){ 125*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /*century flip store off new year*/ 126*0c698dcaSJean-Christophe PLAGNIOL-VILLARD cent += 1; 127*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_write(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE); 128*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 129*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year =((int)cent*100)+bcd2bin(data[RTC_YEARS_ADDR]); 130*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 131*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 132*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_wday = bcd2bin (data[RTC_DAY_ADDR] & 0x07); 133*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_yday = 0; 134*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_isdst= 0; 135*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 136*0c698dcaSJean-Christophe PLAGNIOL-VILLARD debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 137*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 138*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 139*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 140*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 141*0c698dcaSJean-Christophe PLAGNIOL-VILLARD void rtc_set (struct rtc_time *tmp) 142*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 143*0c698dcaSJean-Christophe PLAGNIOL-VILLARD uchar data[RTC_REG_CNT]; 144*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 145*0c698dcaSJean-Christophe PLAGNIOL-VILLARD debug ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 146*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 147*0c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 148*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 149*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_SEC_ADDR] = bin2bcd(tmp->tm_sec) & 0x7F;/*just in case*/ 150*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_MIN_ADDR] = bin2bcd(tmp->tm_min); 151*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] = bin2bcd(tmp->tm_hour) & 0x3F;/*handle cent stuff later*/ 152*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_DATE_ADDR] = bin2bcd(tmp->tm_mday) & 0x3F; 153*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_MONTH_ADDR] = bin2bcd(tmp->tm_mon); 154*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_DAY_ADDR] = bin2bcd(tmp->tm_wday) & 0x07; 155*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 156*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] |= 0x80;/*we will always use CEB*/ 157*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 158*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_YEARS_ADDR] = bin2bcd(tmp->tm_year%100);/*same thing either way*/ 159*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #ifndef CFG_M41T11_EXT_CENTURY_DATA 160*0c698dcaSJean-Christophe PLAGNIOL-VILLARD if( ((tmp->tm_year - CFG_M41T11_BASE_YEAR) > 200) || 161*0c698dcaSJean-Christophe PLAGNIOL-VILLARD (tmp->tm_year < CFG_M41T11_BASE_YEAR) ){ 162*0c698dcaSJean-Christophe PLAGNIOL-VILLARD printf( "m41t11 RTC setting year out of range!!need recompile\n" ); 163*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 164*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] |= (tmp->tm_year - CFG_M41T11_BASE_YEAR) > 100 ? 0x40 : 0; 165*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 166*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 167*0c698dcaSJean-Christophe PLAGNIOL-VILLARD unsigned char cent; 168*0c698dcaSJean-Christophe PLAGNIOL-VILLARD cent = tmp->tm_year ? tmp->tm_year / 100 : 0; 169*0c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] |= (cent & 0x1) ? 0x40 : 0; 170*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_write(CFG_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE); 171*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 172*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 173*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_write(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT); 174*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 175*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 176*0c698dcaSJean-Christophe PLAGNIOL-VILLARD void rtc_reset (void) 177*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 178*0c698dcaSJean-Christophe PLAGNIOL-VILLARD unsigned char val; 179*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /* clear all control & status registers */ 180*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_read(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, &val, 1); 181*0c698dcaSJean-Christophe PLAGNIOL-VILLARD val = val & 0x7F;/*make sure we are running*/ 182*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_write(CFG_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, &val, RTC_REG_CNT); 183*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 184*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_read(CFG_I2C_RTC_ADDR, RTC_CONTROL_ADDR, 1, &val, 1); 185*0c698dcaSJean-Christophe PLAGNIOL-VILLARD val = val & 0x3F;/*turn off freq test keep calibration*/ 186*0c698dcaSJean-Christophe PLAGNIOL-VILLARD i2c_write(CFG_I2C_RTC_ADDR, RTC_CONTROL_ADDR, 1, &val, 1); 187*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 188*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 189*0c698dcaSJean-Christophe PLAGNIOL-VILLARD int rtc_store(int addr, unsigned char* data, int size) 190*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 191*0c698dcaSJean-Christophe PLAGNIOL-VILLARD /*don't let things wrap onto the time on a write*/ 192*0c698dcaSJean-Christophe PLAGNIOL-VILLARD if( (addr+size) >= M41T11_STORAGE_SZ ) 193*0c698dcaSJean-Christophe PLAGNIOL-VILLARD return 1; 194*0c698dcaSJean-Christophe PLAGNIOL-VILLARD return i2c_write( CFG_I2C_RTC_ADDR, REG_CNT+addr, 1, data, size ); 195*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 196*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 197*0c698dcaSJean-Christophe PLAGNIOL-VILLARD int rtc_recall(int addr, unsigned char* data, int size) 198*0c698dcaSJean-Christophe PLAGNIOL-VILLARD { 199*0c698dcaSJean-Christophe PLAGNIOL-VILLARD return i2c_read( CFG_I2C_RTC_ADDR, REG_CNT+addr, 1, data, size ); 200*0c698dcaSJean-Christophe PLAGNIOL-VILLARD } 201*0c698dcaSJean-Christophe PLAGNIOL-VILLARD 202*0c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 203