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git.ipfire.org Git - thirdparty/u-boot.git/blob - cmd/date.c
1 // SPDX-License-Identifier: GPL-2.0+
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * RTC, Date & Time support: get and set date & time
16 DECLARE_GLOBAL_DATA_PTR
;
18 static const char * const weekdays
[] = {
19 "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur",
22 #ifdef CONFIG_NEEDS_MANUAL_RELOC
23 #define RELOC(a) ((typeof(a))((unsigned long)(a) + gd->reloc_off))
28 int mk_date (const char *, struct rtc_time
*);
30 static struct rtc_time default_tm
= { 0, 0, 0, 1, 1, 2000, 6, 0, 0 };
32 static int do_date(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
36 int old_bus __maybe_unused
;
38 /* switch to correct I2C bus */
42 rcode
= uclass_get_device(UCLASS_RTC
, 0, &dev
);
44 printf("Cannot find RTC: err=%d\n", rcode
);
45 return CMD_RET_FAILURE
;
47 #elif defined(CONFIG_SYS_I2C)
48 old_bus
= i2c_get_bus_num();
49 i2c_set_bus_num(CONFIG_SYS_RTC_BUS_NUM
);
51 old_bus
= I2C_GET_BUS();
52 I2C_SET_BUS(CONFIG_SYS_RTC_BUS_NUM
);
56 case 2: /* set date & time */
57 if (strcmp(argv
[1],"reset") == 0) {
58 puts ("Reset RTC...\n");
60 rcode
= dm_rtc_reset(dev
);
62 rcode
= dm_rtc_set(dev
, &default_tm
);
65 rcode
= rtc_set(&default_tm
);
68 puts("## Failed to set date after RTC reset\n");
70 /* initialize tm with current time */
72 rcode
= dm_rtc_get(dev
, &tm
);
77 /* insert new date & time */
78 if (mk_date(argv
[1], &tm
) != 0) {
79 puts ("## Bad date format\n");
82 /* and write to RTC */
84 rcode
= dm_rtc_set(dev
, &tm
);
89 printf("## Set date failed: err=%d\n",
93 puts("## Get date failed\n");
97 case 1: /* get date & time */
99 rcode
= dm_rtc_get(dev
, &tm
);
101 rcode
= rtc_get(&tm
);
104 puts("## Get date failed\n");
108 printf ("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n",
109 tm
.tm_year
, tm
.tm_mon
, tm
.tm_mday
,
110 (tm
.tm_wday
<0 || tm
.tm_wday
>6) ?
111 "unknown " : RELOC(weekdays
[tm
.tm_wday
]),
112 tm
.tm_hour
, tm
.tm_min
, tm
.tm_sec
);
116 rcode
= CMD_RET_USAGE
;
119 /* switch back to original I2C bus */
120 #ifdef CONFIG_SYS_I2C
121 i2c_set_bus_num(old_bus
);
122 #elif !defined(CONFIG_DM_RTC)
123 I2C_SET_BUS(old_bus
);
126 return rcode
? CMD_RET_FAILURE
: 0;
130 * simple conversion of two-digit string with error checking
132 static int cnvrt2 (const char *str
, int *valp
)
136 if ((*str
< '0') || (*str
> '9'))
143 if ((*str
< '0') || (*str
> '9'))
146 *valp
= 10 * val
+ (*str
- '0');
152 * Convert date string: MMDDhhmm[[CC]YY][.ss]
154 * Some basic checking for valid values is done, but this will not catch
155 * all possible error conditions.
157 int mk_date (const char *datestr
, struct rtc_time
*tmp
)
162 ptr
= strchr (datestr
,'.');
163 len
= strlen (datestr
);
170 if ((len
- (ptr
- datestr
)) != 2)
173 len
= strlen (datestr
);
175 if (cnvrt2 (ptr
, &sec
))
183 if (len
== 12) { /* MMDDhhmmCCYY */
186 if (cnvrt2 (datestr
+ 8, ¢ury
) ||
187 cnvrt2 (datestr
+10, &year
) ) {
190 tmp
->tm_year
= 100 * century
+ year
;
191 } else if (len
== 10) { /* MMDDhhmmYY */
194 century
= tmp
->tm_year
/ 100;
195 if (cnvrt2 (datestr
+ 8, &year
))
197 tmp
->tm_year
= 100 * century
+ year
;
201 case 8: /* MMDDhhmm */
203 case 10: /* MMDDhhmmYY */
205 case 12: /* MMDDhhmmCCYY */
206 if (cnvrt2 (datestr
+0, &val
) ||
211 if (cnvrt2 (datestr
+2, &val
) ||
212 val
> ((tmp
->tm_mon
==2) ? 29 : 31)) {
217 if (cnvrt2 (datestr
+4, &val
) ||
223 if (cnvrt2 (datestr
+6, &val
) ||
229 /* calculate day of week */
230 rtc_calc_weekday(tmp
);
240 /***************************************************/
244 "get/set/reset date & time",
245 "[MMDDhhmm[[CC]YY][.ss]]\ndate reset\n"
246 " - without arguments: print date & time\n"
247 " - with numeric argument: set the system date & time\n"
248 " - with 'reset' argument: reset the RTC"