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3863585b
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1/*
2 * (C) Copyright 2001
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
1a459660 5 * SPDX-License-Identifier: GPL-2.0+
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6 */
7
8/*
9 * RTC, Date & Time support: get and set date & time
10 */
11#include <common.h>
12#include <command.h>
f9951ead 13#include <dm.h>
3863585b 14#include <rtc.h>
0dc018ec 15#include <i2c.h>
3863585b 16
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17DECLARE_GLOBAL_DATA_PTR;
18
bdbc1303 19static const char * const weekdays[] = {
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20 "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur",
21};
22
2e5167cc 23#ifdef CONFIG_NEEDS_MANUAL_RELOC
3e38691e 24#define RELOC(a) ((typeof(a))((unsigned long)(a) + gd->reloc_off))
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25#else
26#define RELOC(a) a
521af04d 27#endif
3e38691e 28
bdbc1303 29int mk_date (const char *, struct rtc_time *);
3863585b 30
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31static struct rtc_time default_tm = { 0, 0, 0, 1, 1, 2000, 6, 0, 0 };
32
088f1b19 33static int do_date(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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34{
35 struct rtc_time tm;
36 int rcode = 0;
f9951ead 37 int old_bus __maybe_unused;
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SR
38
39 /* switch to correct I2C bus */
ffe38798 40#ifdef CONFIG_DM_RTC
f9951ead
SG
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)
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49 old_bus = i2c_get_bus_num();
50 i2c_set_bus_num(CONFIG_SYS_RTC_BUS_NUM);
51#else
0dc018ec 52 old_bus = I2C_GET_BUS();
6d0f6bcf 53 I2C_SET_BUS(CONFIG_SYS_RTC_BUS_NUM);
3f4978c7 54#endif
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55
56 switch (argc) {
57 case 2: /* set date & time */
58 if (strcmp(argv[1],"reset") == 0) {
4b9206ed 59 puts ("Reset RTC...\n");
ffe38798 60#ifdef CONFIG_DM_RTC
f9951ead
SG
61 rcode = dm_rtc_reset(dev);
62 if (!rcode)
63 rcode = dm_rtc_set(dev, &default_tm);
64#else
65 rtc_reset();
1a1fa240 66 rcode = rtc_set(&default_tm);
f9951ead 67#endif
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68 if (rcode)
69 puts("## Failed to set date after RTC reset\n");
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70 } else {
71 /* initialize tm with current time */
ffe38798 72#ifdef CONFIG_DM_RTC
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73 rcode = dm_rtc_get(dev, &tm);
74#else
75 rcode = rtc_get(&tm);
76#endif
77 if (!rcode) {
d1e23194 78 /* insert new date & time */
f9951ead 79 if (mk_date(argv[1], &tm) != 0) {
d1e23194
JCPV
80 puts ("## Bad date format\n");
81 break;
82 }
83 /* and write to RTC */
ffe38798 84#ifdef CONFIG_DM_RTC
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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 }
d1e23194 93 } else {
d52e3e01 94 puts("## Get date failed\n");
3863585b 95 }
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96 }
97 /* FALL TROUGH */
98 case 1: /* get date & time */
ffe38798 99#ifdef CONFIG_DM_RTC
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100 rcode = dm_rtc_get(dev, &tm);
101#else
102 rcode = rtc_get(&tm);
103#endif
d1e23194 104 if (rcode) {
d52e3e01 105 puts("## Get date failed\n");
d1e23194
JCPV
106 break;
107 }
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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) ?
3e38691e 112 "unknown " : RELOC(weekdays[tm.tm_wday]),
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113 tm.tm_hour, tm.tm_min, tm.tm_sec);
114
0dc018ec 115 break;
3863585b 116 default:
4c12eeb8 117 rcode = CMD_RET_USAGE;
3863585b 118 }
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119
120 /* switch back to original I2C bus */
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121#ifdef CONFIG_SYS_I2C
122 i2c_set_bus_num(old_bus);
ffe38798 123#elif !defined(CONFIG_DM_RTC)
0dc018ec 124 I2C_SET_BUS(old_bus);
3f4978c7 125#endif
0dc018ec 126
f9951ead 127 return rcode ? CMD_RET_FAILURE : 0;
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128}
129
130/*
131 * simple conversion of two-digit string with error checking
132 */
bdbc1303 133static int cnvrt2 (const char *str, int *valp)
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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 */
bdbc1303 158int mk_date (const char *datestr, struct rtc_time *tmp)
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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 */
199e87c3 231 rtc_calc_weekday(tmp);
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232
233 return (0);
234 default:
235 break;
236 }
237
238 return (-1);
239}
240
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241/***************************************************/
242
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243U_BOOT_CMD(
244 date, 2, 1, do_date,
2fb2604d 245 "get/set/reset date & time",
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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"
a89c33db 249 " - with 'reset' argument: reset the RTC"
8bde7f77 250);