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wdenk38635852002-08-27 05:55:31 +00001/*
2 * (C) Copyright 2001
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24/*
25 * RTC, Date & Time support: get and set date & time
26 */
27#include <common.h>
28#include <command.h>
29#include <rtc.h>
30
31#if (CONFIG_COMMANDS & CFG_CMD_DATE)
32
33const char *weekdays[] = {
34 "Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur",
35};
36
37int mk_date (char *, struct rtc_time *);
38
39int do_date (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
40{
41 struct rtc_time tm;
42 int rcode = 0;
43
44 switch (argc) {
45 case 2: /* set date & time */
46 if (strcmp(argv[1],"reset") == 0) {
47 printf ("Reset RTC...\n");
48 rtc_reset ();
49 } else {
50 /* initialize tm with current time */
51 rtc_get (&tm);
52 /* insert new date & time */
53 if (mk_date (argv[1], &tm) != 0) {
54 printf ("## Bad date format\n");
55 return 1;
56 }
57 /* and write to RTC */
58 rtc_set (&tm);
59 }
60 /* FALL TROUGH */
61 case 1: /* get date & time */
62 rtc_get (&tm);
63
64 printf ("Date: %4d-%02d-%02d (%sday) Time: %2d:%02d:%02d\n",
65 tm.tm_year, tm.tm_mon, tm.tm_mday,
66 (tm.tm_wday<0 || tm.tm_wday>6) ?
67 "unknown " : weekdays[tm.tm_wday],
68 tm.tm_hour, tm.tm_min, tm.tm_sec);
69
70 return 0;
71 default:
72 printf ("Usage:\n%s\n", cmdtp->usage);
73 rcode = 1;
74 }
75 return rcode;
76}
77
78/*
79 * simple conversion of two-digit string with error checking
80 */
81static int cnvrt2 (char *str, int *valp)
82{
83 int val;
84
85 if ((*str < '0') || (*str > '9'))
86 return (-1);
87
88 val = *str - '0';
89
90 ++str;
91
92 if ((*str < '0') || (*str > '9'))
93 return (-1);
94
95 *valp = 10 * val + (*str - '0');
96
97 return (0);
98}
99
100/*
101 * Convert date string: MMDDhhmm[[CC]YY][.ss]
102 *
103 * Some basic checking for valid values is done, but this will not catch
104 * all possible error conditions.
105 */
106int mk_date (char *datestr, struct rtc_time *tmp)
107{
108 int len, val;
109 char *ptr;
110
111 ptr = strchr (datestr,'.');
112 len = strlen (datestr);
113
114 /* Set seconds */
115 if (ptr) {
116 int sec;
117
118 *ptr++ = '\0';
119 if ((len - (ptr - datestr)) != 2)
120 return (-1);
121
122 len = strlen (datestr);
123
124 if (cnvrt2 (ptr, &sec))
125 return (-1);
126
127 tmp->tm_sec = sec;
128 } else {
129 tmp->tm_sec = 0;
130 }
131
132 if (len == 12) { /* MMDDhhmmCCYY */
133 int year, century;
134
135 if (cnvrt2 (datestr+ 8, &century) ||
136 cnvrt2 (datestr+10, &year) ) {
137 return (-1);
138 }
139 tmp->tm_year = 100 * century + year;
140 } else if (len == 10) { /* MMDDhhmmYY */
141 int year, century;
142
143 century = tmp->tm_year / 100;
144 if (cnvrt2 (datestr+ 8, &year))
145 return (-1);
146 tmp->tm_year = 100 * century + year;
147 }
148
149 switch (len) {
150 case 8: /* MMDDhhmm */
151 /* fall thru */
152 case 10: /* MMDDhhmmYY */
153 /* fall thru */
154 case 12: /* MMDDhhmmCCYY */
155 if (cnvrt2 (datestr+0, &val) ||
156 val > 12) {
157 break;
158 }
159 tmp->tm_mon = val;
160 if (cnvrt2 (datestr+2, &val) ||
161 val > ((tmp->tm_mon==2) ? 29 : 31)) {
162 break;
163 }
164 tmp->tm_mday = val;
165
166 if (cnvrt2 (datestr+4, &val) ||
167 val > 23) {
168 break;
169 }
170 tmp->tm_hour = val;
171
172 if (cnvrt2 (datestr+6, &val) ||
173 val > 59) {
174 break;
175 }
176 tmp->tm_min = val;
177
178 /* calculate day of week */
179 GregorianDay (tmp);
180
181 return (0);
182 default:
183 break;
184 }
185
186 return (-1);
187}
188
189#endif /* CFG_CMD_DATE */