/* * (C) Copyright 2001 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * SPDX-License-Identifier: GPL-2.0+ */ /* * RTC, Date & Time support: get and set date & time */ #include <common.h> #include <command.h> #include <rtc.h> #include <i2c.h> DECLARE_GLOBAL_DATA_PTR; static const char * const weekdays[] = { "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur", }; #ifdef CONFIG_NEEDS_MANUAL_RELOC #define RELOC(a) ((typeof(a))((unsigned long)(a) + gd->reloc_off)) #else #define RELOC(a) a #endif int mk_date (const char *, struct rtc_time *); static int do_date(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { struct rtc_time tm; int rcode = 0; int old_bus; /* switch to correct I2C bus */ #ifdef CONFIG_SYS_I2C old_bus = i2c_get_bus_num(); i2c_set_bus_num(CONFIG_SYS_RTC_BUS_NUM); #else old_bus = I2C_GET_BUS(); I2C_SET_BUS(CONFIG_SYS_RTC_BUS_NUM); #endif switch (argc) { case 2: /* set date & time */ if (strcmp(argv[1],"reset") == 0) { puts ("Reset RTC...\n"); rtc_reset (); } else { /* initialize tm with current time */ rcode = rtc_get (&tm); if(!rcode) { /* insert new date & time */ if (mk_date (argv[1], &tm) != 0) { puts ("## Bad date format\n"); break; } /* and write to RTC */ rcode = rtc_set (&tm); if(rcode) puts("## Set date failed\n"); } else { puts("## Get date failed\n"); } } /* FALL TROUGH */ case 1: /* get date & time */ rcode = rtc_get (&tm); if (rcode) { puts("## Get date failed\n"); break; } printf ("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n", tm.tm_year, tm.tm_mon, tm.tm_mday, (tm.tm_wday<0 || tm.tm_wday>6) ? "unknown " : RELOC(weekdays[tm.tm_wday]), tm.tm_hour, tm.tm_min, tm.tm_sec); break; default: rcode = CMD_RET_USAGE; } /* switch back to original I2C bus */ #ifdef CONFIG_SYS_I2C i2c_set_bus_num(old_bus); #else I2C_SET_BUS(old_bus); #endif return rcode; } /* * simple conversion of two-digit string with error checking */ static int cnvrt2 (const char *str, int *valp) { int val; if ((*str < '0') || (*str > '9')) return (-1); val = *str - '0'; ++str; if ((*str < '0') || (*str > '9')) return (-1); *valp = 10 * val + (*str - '0'); return (0); } /* * Convert date string: MMDDhhmm[[CC]YY][.ss] * * Some basic checking for valid values is done, but this will not catch * all possible error conditions. */ int mk_date (const char *datestr, struct rtc_time *tmp) { int len, val; char *ptr; ptr = strchr (datestr,'.'); len = strlen (datestr); /* Set seconds */ if (ptr) { int sec; *ptr++ = '\0'; if ((len - (ptr - datestr)) != 2) return (-1); len = strlen (datestr); if (cnvrt2 (ptr, &sec)) return (-1); tmp->tm_sec = sec; } else { tmp->tm_sec = 0; } if (len == 12) { /* MMDDhhmmCCYY */ int year, century; if (cnvrt2 (datestr+ 8, ¢ury) || cnvrt2 (datestr+10, &year) ) { return (-1); } tmp->tm_year = 100 * century + year; } else if (len == 10) { /* MMDDhhmmYY */ int year, century; century = tmp->tm_year / 100; if (cnvrt2 (datestr+ 8, &year)) return (-1); tmp->tm_year = 100 * century + year; } switch (len) { case 8: /* MMDDhhmm */ /* fall thru */ case 10: /* MMDDhhmmYY */ /* fall thru */ case 12: /* MMDDhhmmCCYY */ if (cnvrt2 (datestr+0, &val) || val > 12) { break; } tmp->tm_mon = val; if (cnvrt2 (datestr+2, &val) || val > ((tmp->tm_mon==2) ? 29 : 31)) { break; } tmp->tm_mday = val; if (cnvrt2 (datestr+4, &val) || val > 23) { break; } tmp->tm_hour = val; if (cnvrt2 (datestr+6, &val) || val > 59) { break; } tmp->tm_min = val; /* calculate day of week */ GregorianDay (tmp); return (0); default: break; } return (-1); } /***************************************************/ U_BOOT_CMD( date, 2, 1, do_date, "get/set/reset date & time", "[MMDDhhmm[[CC]YY][.ss]]\ndate reset\n" " - without arguments: print date & time\n" " - with numeric argument: set the system date & time\n" " - with 'reset' argument: reset the RTC" );