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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, &century) ||
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 );