1 /* 2 * (C) Copyright 2001 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /* 9 * RTC, Date & Time support: get and set date & time 10 */ 11 #include <common.h> 12 #include <command.h> 13 #include <dm.h> 14 #include <rtc.h> 15 #include <i2c.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 static const char * const weekdays[] = { 20 "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur", 21 }; 22 23 #ifdef CONFIG_NEEDS_MANUAL_RELOC 24 #define RELOC(a) ((typeof(a))((unsigned long)(a) + gd->reloc_off)) 25 #else 26 #define RELOC(a) a 27 #endif 28 29 int mk_date (const char *, struct rtc_time *); 30 31 static struct rtc_time default_tm = { 0, 0, 0, 1, 1, 2000, 6, 0, 0 }; 32 33 static int do_date(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 34 { 35 struct rtc_time tm; 36 int rcode = 0; 37 int old_bus __maybe_unused; 38 39 /* switch to correct I2C bus */ 40 #ifdef CONFIG_DM_RTC 41 struct udevice *dev; 42 43 rcode = uclass_get_device(UCLASS_RTC, 0, &dev); 44 if (rcode) { 45 printf("Cannot find RTC: err=%d\n", rcode); 46 return CMD_RET_FAILURE; 47 } 48 #elif defined(CONFIG_SYS_I2C) 49 old_bus = i2c_get_bus_num(); 50 i2c_set_bus_num(CONFIG_SYS_RTC_BUS_NUM); 51 #else 52 old_bus = I2C_GET_BUS(); 53 I2C_SET_BUS(CONFIG_SYS_RTC_BUS_NUM); 54 #endif 55 56 switch (argc) { 57 case 2: /* set date & time */ 58 if (strcmp(argv[1],"reset") == 0) { 59 puts ("Reset RTC...\n"); 60 #ifdef CONFIG_DM_RTC 61 rcode = dm_rtc_reset(dev); 62 if (!rcode) 63 rcode = dm_rtc_set(dev, &default_tm); 64 #else 65 rtc_reset(); 66 rcode = rtc_set(&default_tm); 67 #endif 68 if (rcode) 69 puts("## Failed to set date after RTC reset\n"); 70 } else { 71 /* initialize tm with current time */ 72 #ifdef CONFIG_DM_RTC 73 rcode = dm_rtc_get(dev, &tm); 74 #else 75 rcode = rtc_get(&tm); 76 #endif 77 if (!rcode) { 78 /* insert new date & time */ 79 if (mk_date(argv[1], &tm) != 0) { 80 puts ("## Bad date format\n"); 81 break; 82 } 83 /* and write to RTC */ 84 #ifdef CONFIG_DM_RTC 85 rcode = dm_rtc_set(dev, &tm); 86 #else 87 rcode = rtc_set(&tm); 88 #endif 89 if (rcode) { 90 printf("## Set date failed: err=%d\n", 91 rcode); 92 } 93 } else { 94 puts("## Get date failed\n"); 95 } 96 } 97 /* FALL TROUGH */ 98 case 1: /* get date & time */ 99 #ifdef CONFIG_DM_RTC 100 rcode = dm_rtc_get(dev, &tm); 101 #else 102 rcode = rtc_get(&tm); 103 #endif 104 if (rcode) { 105 puts("## Get date failed\n"); 106 break; 107 } 108 109 printf ("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n", 110 tm.tm_year, tm.tm_mon, tm.tm_mday, 111 (tm.tm_wday<0 || tm.tm_wday>6) ? 112 "unknown " : RELOC(weekdays[tm.tm_wday]), 113 tm.tm_hour, tm.tm_min, tm.tm_sec); 114 115 break; 116 default: 117 rcode = CMD_RET_USAGE; 118 } 119 120 /* switch back to original I2C bus */ 121 #ifdef CONFIG_SYS_I2C 122 i2c_set_bus_num(old_bus); 123 #elif !defined(CONFIG_DM_RTC) 124 I2C_SET_BUS(old_bus); 125 #endif 126 127 return rcode ? CMD_RET_FAILURE : 0; 128 } 129 130 /* 131 * simple conversion of two-digit string with error checking 132 */ 133 static int cnvrt2 (const char *str, int *valp) 134 { 135 int val; 136 137 if ((*str < '0') || (*str > '9')) 138 return (-1); 139 140 val = *str - '0'; 141 142 ++str; 143 144 if ((*str < '0') || (*str > '9')) 145 return (-1); 146 147 *valp = 10 * val + (*str - '0'); 148 149 return (0); 150 } 151 152 /* 153 * Convert date string: MMDDhhmm[[CC]YY][.ss] 154 * 155 * Some basic checking for valid values is done, but this will not catch 156 * all possible error conditions. 157 */ 158 int mk_date (const char *datestr, struct rtc_time *tmp) 159 { 160 int len, val; 161 char *ptr; 162 163 ptr = strchr (datestr,'.'); 164 len = strlen (datestr); 165 166 /* Set seconds */ 167 if (ptr) { 168 int sec; 169 170 *ptr++ = '\0'; 171 if ((len - (ptr - datestr)) != 2) 172 return (-1); 173 174 len = strlen (datestr); 175 176 if (cnvrt2 (ptr, &sec)) 177 return (-1); 178 179 tmp->tm_sec = sec; 180 } else { 181 tmp->tm_sec = 0; 182 } 183 184 if (len == 12) { /* MMDDhhmmCCYY */ 185 int year, century; 186 187 if (cnvrt2 (datestr+ 8, ¢ury) || 188 cnvrt2 (datestr+10, &year) ) { 189 return (-1); 190 } 191 tmp->tm_year = 100 * century + year; 192 } else if (len == 10) { /* MMDDhhmmYY */ 193 int year, century; 194 195 century = tmp->tm_year / 100; 196 if (cnvrt2 (datestr+ 8, &year)) 197 return (-1); 198 tmp->tm_year = 100 * century + year; 199 } 200 201 switch (len) { 202 case 8: /* MMDDhhmm */ 203 /* fall thru */ 204 case 10: /* MMDDhhmmYY */ 205 /* fall thru */ 206 case 12: /* MMDDhhmmCCYY */ 207 if (cnvrt2 (datestr+0, &val) || 208 val > 12) { 209 break; 210 } 211 tmp->tm_mon = val; 212 if (cnvrt2 (datestr+2, &val) || 213 val > ((tmp->tm_mon==2) ? 29 : 31)) { 214 break; 215 } 216 tmp->tm_mday = val; 217 218 if (cnvrt2 (datestr+4, &val) || 219 val > 23) { 220 break; 221 } 222 tmp->tm_hour = val; 223 224 if (cnvrt2 (datestr+6, &val) || 225 val > 59) { 226 break; 227 } 228 tmp->tm_min = val; 229 230 /* calculate day of week */ 231 rtc_calc_weekday(tmp); 232 233 return (0); 234 default: 235 break; 236 } 237 238 return (-1); 239 } 240 241 /***************************************************/ 242 243 U_BOOT_CMD( 244 date, 2, 1, do_date, 245 "get/set/reset date & time", 246 "[MMDDhhmm[[CC]YY][.ss]]\ndate reset\n" 247 " - without arguments: print date & time\n" 248 " - with numeric argument: set the system date & time\n" 249 " - with 'reset' argument: reset the RTC" 250 ); 251