1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 20c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 30c698dcaSJean-Christophe PLAGNIOL-VILLARD * (C) Copyright 2002 40c698dcaSJean-Christophe PLAGNIOL-VILLARD * Andrew May, Viasat Inc, amay@viasat.com 50c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 60c698dcaSJean-Christophe PLAGNIOL-VILLARD 70c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 80c698dcaSJean-Christophe PLAGNIOL-VILLARD * M41T11 Serial Access Timekeeper(R) SRAM 90c698dcaSJean-Christophe PLAGNIOL-VILLARD * can you believe a trademark on that? 100c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 110c698dcaSJean-Christophe PLAGNIOL-VILLARD 120c698dcaSJean-Christophe PLAGNIOL-VILLARD /* #define DEBUG 1 */ 130c698dcaSJean-Christophe PLAGNIOL-VILLARD 140c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <common.h> 150c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <command.h> 160c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <rtc.h> 170c698dcaSJean-Christophe PLAGNIOL-VILLARD #include <i2c.h> 180c698dcaSJean-Christophe PLAGNIOL-VILLARD 190c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 200c698dcaSJean-Christophe PLAGNIOL-VILLARD I Don't have an example config file but this 210c698dcaSJean-Christophe PLAGNIOL-VILLARD is what should be done. 220c698dcaSJean-Christophe PLAGNIOL-VILLARD 230c698dcaSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_RTC_M41T11 1 246d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_I2C_RTC_ADDR 0x68 250c698dcaSJean-Christophe PLAGNIOL-VILLARD #if 0 266d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_M41T11_EXT_CENTURY_DATA 270c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 286d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_M41T11_BASE_YEAR 2000 290c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 300c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 310c698dcaSJean-Christophe PLAGNIOL-VILLARD 326d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #if defined(CONFIG_SYS_I2C_RTC_ADDR) && defined(CONFIG_CMD_DATE) 330c698dcaSJean-Christophe PLAGNIOL-VILLARD 340c698dcaSJean-Christophe PLAGNIOL-VILLARD /* ------------------------------------------------------------------------- */ 350c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 360c698dcaSJean-Christophe PLAGNIOL-VILLARD these are simple defines for the chip local to here so they aren't too 370c698dcaSJean-Christophe PLAGNIOL-VILLARD verbose 380c698dcaSJean-Christophe PLAGNIOL-VILLARD DAY/DATE aren't nice but that is how they are on the data sheet 390c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 400c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_SEC_ADDR 0x0 410c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_MIN_ADDR 0x1 420c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_HOUR_ADDR 0x2 430c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_DAY_ADDR 0x3 440c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_DATE_ADDR 0x4 450c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_MONTH_ADDR 0x5 460c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_YEARS_ADDR 0x6 470c698dcaSJean-Christophe PLAGNIOL-VILLARD 480c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_REG_CNT 7 490c698dcaSJean-Christophe PLAGNIOL-VILLARD 500c698dcaSJean-Christophe PLAGNIOL-VILLARD #define RTC_CONTROL_ADDR 0x7 510c698dcaSJean-Christophe PLAGNIOL-VILLARD 520c698dcaSJean-Christophe PLAGNIOL-VILLARD 536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #ifndef CONFIG_SYS_M41T11_EXT_CENTURY_DATA 540c698dcaSJean-Christophe PLAGNIOL-VILLARD 550c698dcaSJean-Christophe PLAGNIOL-VILLARD #define REG_CNT (RTC_REG_CNT+1) 560c698dcaSJean-Christophe PLAGNIOL-VILLARD 570c698dcaSJean-Christophe PLAGNIOL-VILLARD /* 580c698dcaSJean-Christophe PLAGNIOL-VILLARD you only get 00-99 for the year we will asume you 590c698dcaSJean-Christophe PLAGNIOL-VILLARD want from the year 2000 if you don't set the config 600c698dcaSJean-Christophe PLAGNIOL-VILLARD */ 616d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #ifndef CONFIG_SYS_M41T11_BASE_YEAR 626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #define CONFIG_SYS_M41T11_BASE_YEAR 2000 630c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 640c698dcaSJean-Christophe PLAGNIOL-VILLARD 650c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 660c698dcaSJean-Christophe PLAGNIOL-VILLARD /* we will store extra year info in byte 9*/ 670c698dcaSJean-Christophe PLAGNIOL-VILLARD #define M41T11_YEAR_DATA 0x8 680c698dcaSJean-Christophe PLAGNIOL-VILLARD #define M41T11_YEAR_SIZE 1 690c698dcaSJean-Christophe PLAGNIOL-VILLARD #define REG_CNT (RTC_REG_CNT+1+M41T11_YEAR_SIZE) 700c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 710c698dcaSJean-Christophe PLAGNIOL-VILLARD 720c698dcaSJean-Christophe PLAGNIOL-VILLARD #define M41T11_STORAGE_SZ (64-REG_CNT) 730c698dcaSJean-Christophe PLAGNIOL-VILLARD 74b73a19e1SYuri Tikhonov int rtc_get (struct rtc_time *tmp) 750c698dcaSJean-Christophe PLAGNIOL-VILLARD { 76b73a19e1SYuri Tikhonov int rel = 0; 770c698dcaSJean-Christophe PLAGNIOL-VILLARD uchar data[RTC_REG_CNT]; 780c698dcaSJean-Christophe PLAGNIOL-VILLARD 796d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT); 800c698dcaSJean-Christophe PLAGNIOL-VILLARD 810c698dcaSJean-Christophe PLAGNIOL-VILLARD if( data[RTC_SEC_ADDR] & 0x80 ){ 820c698dcaSJean-Christophe PLAGNIOL-VILLARD printf( "m41t11 RTC Clock stopped!!!\n" ); 83b73a19e1SYuri Tikhonov rel = -1; 840c698dcaSJean-Christophe PLAGNIOL-VILLARD } 850c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_sec = bcd2bin (data[RTC_SEC_ADDR] & 0x7F); 860c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_min = bcd2bin (data[RTC_MIN_ADDR] & 0x7F); 870c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_hour = bcd2bin (data[RTC_HOUR_ADDR] & 0x3F); 880c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_mday = bcd2bin (data[RTC_DATE_ADDR] & 0x3F); 890c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_mon = bcd2bin (data[RTC_MONTH_ADDR]& 0x1F); 906d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #ifndef CONFIG_SYS_M41T11_EXT_CENTURY_DATA 916d0f6bcfSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year = CONFIG_SYS_M41T11_BASE_YEAR 920c698dcaSJean-Christophe PLAGNIOL-VILLARD + bcd2bin(data[RTC_YEARS_ADDR]) 930c698dcaSJean-Christophe PLAGNIOL-VILLARD + ((data[RTC_HOUR_ADDR]&0x40) ? 100 : 0); 940c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 950c698dcaSJean-Christophe PLAGNIOL-VILLARD { 960c698dcaSJean-Christophe PLAGNIOL-VILLARD unsigned char cent; 976d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_read(CONFIG_SYS_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE); 980c698dcaSJean-Christophe PLAGNIOL-VILLARD if( !(data[RTC_HOUR_ADDR] & 0x80) ){ 990c698dcaSJean-Christophe PLAGNIOL-VILLARD printf( "m41t11 RTC: cann't keep track of years without CEB set\n" ); 100b73a19e1SYuri Tikhonov rel = -1; 1010c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1020c698dcaSJean-Christophe PLAGNIOL-VILLARD if( (cent & 0x1) != ((data[RTC_HOUR_ADDR]&0x40)>>7) ){ 1030c698dcaSJean-Christophe PLAGNIOL-VILLARD /*century flip store off new year*/ 1040c698dcaSJean-Christophe PLAGNIOL-VILLARD cent += 1; 1056d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE); 1060c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1070c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year =((int)cent*100)+bcd2bin(data[RTC_YEARS_ADDR]); 1080c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1090c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 1100c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_wday = bcd2bin (data[RTC_DAY_ADDR] & 0x07); 1110c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_yday = 0; 1120c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_isdst= 0; 1130c698dcaSJean-Christophe PLAGNIOL-VILLARD 1140c698dcaSJean-Christophe PLAGNIOL-VILLARD debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 1150c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 1160c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 117b73a19e1SYuri Tikhonov 118b73a19e1SYuri Tikhonov return rel; 1190c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1200c698dcaSJean-Christophe PLAGNIOL-VILLARD 121d1e23194SJean-Christophe PLAGNIOL-VILLARD int rtc_set (struct rtc_time *tmp) 1220c698dcaSJean-Christophe PLAGNIOL-VILLARD { 1230c698dcaSJean-Christophe PLAGNIOL-VILLARD uchar data[RTC_REG_CNT]; 1240c698dcaSJean-Christophe PLAGNIOL-VILLARD 1250c698dcaSJean-Christophe PLAGNIOL-VILLARD debug ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", 1260c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, 1270c698dcaSJean-Christophe PLAGNIOL-VILLARD tmp->tm_hour, tmp->tm_min, tmp->tm_sec); 1280c698dcaSJean-Christophe PLAGNIOL-VILLARD 1290c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_SEC_ADDR] = bin2bcd(tmp->tm_sec) & 0x7F;/*just in case*/ 1300c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_MIN_ADDR] = bin2bcd(tmp->tm_min); 1310c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] = bin2bcd(tmp->tm_hour) & 0x3F;/*handle cent stuff later*/ 1320c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_DATE_ADDR] = bin2bcd(tmp->tm_mday) & 0x3F; 1330c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_MONTH_ADDR] = bin2bcd(tmp->tm_mon); 1340c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_DAY_ADDR] = bin2bcd(tmp->tm_wday) & 0x07; 1350c698dcaSJean-Christophe PLAGNIOL-VILLARD 1360c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] |= 0x80;/*we will always use CEB*/ 1370c698dcaSJean-Christophe PLAGNIOL-VILLARD 1380c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_YEARS_ADDR] = bin2bcd(tmp->tm_year%100);/*same thing either way*/ 1396d0f6bcfSJean-Christophe PLAGNIOL-VILLARD #ifndef CONFIG_SYS_M41T11_EXT_CENTURY_DATA 1406d0f6bcfSJean-Christophe PLAGNIOL-VILLARD if( ((tmp->tm_year - CONFIG_SYS_M41T11_BASE_YEAR) > 200) || 1416d0f6bcfSJean-Christophe PLAGNIOL-VILLARD (tmp->tm_year < CONFIG_SYS_M41T11_BASE_YEAR) ){ 1420c698dcaSJean-Christophe PLAGNIOL-VILLARD printf( "m41t11 RTC setting year out of range!!need recompile\n" ); 1430c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1446d0f6bcfSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] |= (tmp->tm_year - CONFIG_SYS_M41T11_BASE_YEAR) > 100 ? 0x40 : 0; 1450c698dcaSJean-Christophe PLAGNIOL-VILLARD #else 1460c698dcaSJean-Christophe PLAGNIOL-VILLARD { 1470c698dcaSJean-Christophe PLAGNIOL-VILLARD unsigned char cent; 1480c698dcaSJean-Christophe PLAGNIOL-VILLARD cent = tmp->tm_year ? tmp->tm_year / 100 : 0; 1490c698dcaSJean-Christophe PLAGNIOL-VILLARD data[RTC_HOUR_ADDR] |= (cent & 0x1) ? 0x40 : 0; 1506d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T11_YEAR_DATA, 1, ¢, M41T11_YEAR_SIZE); 1510c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1520c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 1536d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, data, RTC_REG_CNT); 154d1e23194SJean-Christophe PLAGNIOL-VILLARD 155d1e23194SJean-Christophe PLAGNIOL-VILLARD return 0; 1560c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1570c698dcaSJean-Christophe PLAGNIOL-VILLARD 1580c698dcaSJean-Christophe PLAGNIOL-VILLARD void rtc_reset (void) 1590c698dcaSJean-Christophe PLAGNIOL-VILLARD { 1600c698dcaSJean-Christophe PLAGNIOL-VILLARD unsigned char val; 1610c698dcaSJean-Christophe PLAGNIOL-VILLARD /* clear all control & status registers */ 1626d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, &val, 1); 1630c698dcaSJean-Christophe PLAGNIOL-VILLARD val = val & 0x7F;/*make sure we are running*/ 1646d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_SEC_ADDR, 1, &val, RTC_REG_CNT); 1650c698dcaSJean-Christophe PLAGNIOL-VILLARD 1666d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_read(CONFIG_SYS_I2C_RTC_ADDR, RTC_CONTROL_ADDR, 1, &val, 1); 1670c698dcaSJean-Christophe PLAGNIOL-VILLARD val = val & 0x3F;/*turn off freq test keep calibration*/ 1686d0f6bcfSJean-Christophe PLAGNIOL-VILLARD i2c_write(CONFIG_SYS_I2C_RTC_ADDR, RTC_CONTROL_ADDR, 1, &val, 1); 1690c698dcaSJean-Christophe PLAGNIOL-VILLARD } 1700c698dcaSJean-Christophe PLAGNIOL-VILLARD #endif 171