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ad5bb451 WD |
1 | /* |
2 | * (C) Copyright 2002 | |
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 | #include <common.h> | |
25 | ||
26 | /* | |
27 | * RTC test | |
28 | * | |
29 | * The Real Time Clock (RTC) operation is verified by this test. | |
30 | * The following features are verified: | |
b73a19e1 YT |
31 | * o) RTC Power Fault |
32 | * This is verified by analyzing the rtc_get() return status. | |
ad5bb451 WD |
33 | * o) Time uniformity |
34 | * This is verified by reading RTC in polling within | |
35 | * a short period of time. | |
36 | * o) Passing month boundaries | |
37 | * This is checked by setting RTC to a second before | |
38 | * a month boundary and reading it after its passing the | |
39 | * boundary. The test is performed for both leap- and | |
40 | * nonleap-years. | |
41 | */ | |
42 | ||
43 | #ifdef CONFIG_POST | |
44 | ||
45 | #include <post.h> | |
46 | #include <rtc.h> | |
47 | ||
48 | #if CONFIG_POST & CFG_POST_RTC | |
49 | ||
50 | static int rtc_post_skip (ulong * diff) | |
51 | { | |
52 | struct rtc_time tm1; | |
53 | struct rtc_time tm2; | |
54 | ulong start1; | |
55 | ulong start2; | |
56 | ||
57 | rtc_get (&tm1); | |
58 | start1 = get_timer (0); | |
59 | ||
60 | while (1) { | |
61 | rtc_get (&tm2); | |
62 | start2 = get_timer (0); | |
63 | if (tm1.tm_sec != tm2.tm_sec) | |
64 | break; | |
65 | if (start2 - start1 > 1500) | |
66 | break; | |
67 | } | |
68 | ||
69 | if (tm1.tm_sec != tm2.tm_sec) { | |
70 | *diff = start2 - start1; | |
71 | ||
72 | return 0; | |
73 | } else { | |
74 | return -1; | |
75 | } | |
76 | } | |
77 | ||
78 | static void rtc_post_restore (struct rtc_time *tm, unsigned int sec) | |
79 | { | |
80 | time_t t = mktime (tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, | |
81 | tm->tm_min, tm->tm_sec) + sec; | |
82 | struct rtc_time ntm; | |
83 | ||
84 | to_tm (t, &ntm); | |
85 | ||
86 | rtc_set (&ntm); | |
87 | } | |
88 | ||
89 | int rtc_post_test (int flags) | |
90 | { | |
91 | ulong diff; | |
92 | unsigned int i; | |
93 | struct rtc_time svtm; | |
94 | static unsigned int daysnl[] = | |
95 | { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; | |
96 | static unsigned int daysl[] = | |
97 | { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; | |
98 | unsigned int ynl = 1999; | |
99 | unsigned int yl = 2000; | |
100 | unsigned int skipped = 0; | |
b73a19e1 YT |
101 | int reliable; |
102 | ||
103 | /* Time reliability */ | |
104 | reliable = rtc_get (&svtm); | |
ad5bb451 WD |
105 | |
106 | /* Time uniformity */ | |
107 | if (rtc_post_skip (&diff) != 0) { | |
108 | post_log ("Timeout while waiting for a new second !\n"); | |
109 | ||
110 | return -1; | |
111 | } | |
112 | ||
113 | for (i = 0; i < 5; i++) { | |
114 | if (rtc_post_skip (&diff) != 0) { | |
115 | post_log ("Timeout while waiting for a new second !\n"); | |
116 | ||
117 | return -1; | |
118 | } | |
119 | ||
120 | if (diff < 950 || diff > 1050) { | |
121 | post_log ("Invalid second duration !\n"); | |
122 | ||
123 | return -1; | |
124 | } | |
125 | } | |
126 | ||
127 | /* Passing month boundaries */ | |
128 | ||
129 | if (rtc_post_skip (&diff) != 0) { | |
130 | post_log ("Timeout while waiting for a new second !\n"); | |
131 | ||
132 | return -1; | |
133 | } | |
134 | rtc_get (&svtm); | |
135 | ||
136 | for (i = 0; i < 12; i++) { | |
137 | time_t t = mktime (ynl, i + 1, daysnl[i], 23, 59, 59); | |
138 | struct rtc_time tm; | |
139 | ||
140 | to_tm (t, &tm); | |
141 | rtc_set (&tm); | |
142 | ||
143 | skipped++; | |
144 | if (rtc_post_skip (&diff) != 0) { | |
145 | rtc_post_restore (&svtm, skipped); | |
146 | post_log ("Timeout while waiting for a new second !\n"); | |
147 | ||
148 | return -1; | |
149 | } | |
150 | ||
151 | rtc_get (&tm); | |
152 | if (tm.tm_mon == i + 1) { | |
153 | rtc_post_restore (&svtm, skipped); | |
154 | post_log ("Month %d boundary is not passed !\n", i + 1); | |
155 | ||
156 | return -1; | |
157 | } | |
158 | } | |
159 | ||
160 | for (i = 0; i < 12; i++) { | |
161 | time_t t = mktime (yl, i + 1, daysl[i], 23, 59, 59); | |
162 | struct rtc_time tm; | |
163 | ||
164 | to_tm (t, &tm); | |
165 | rtc_set (&tm); | |
166 | ||
167 | skipped++; | |
168 | if (rtc_post_skip (&diff) != 0) { | |
169 | rtc_post_restore (&svtm, skipped); | |
170 | post_log ("Timeout while waiting for a new second !\n"); | |
171 | ||
172 | return -1; | |
173 | } | |
174 | ||
175 | rtc_get (&tm); | |
176 | if (tm.tm_mon == i + 1) { | |
177 | rtc_post_restore (&svtm, skipped); | |
178 | post_log ("Month %d boundary is not passed !\n", i + 1); | |
179 | ||
180 | return -1; | |
181 | } | |
182 | } | |
183 | rtc_post_restore (&svtm, skipped); | |
184 | ||
b73a19e1 YT |
185 | /* If come here, then RTC operates correcty, check the correctness |
186 | * of the time it reports. | |
187 | */ | |
188 | if (reliable < 0) { | |
189 | post_log ("RTC Time is not reliable! Power fault? \n"); | |
190 | ||
191 | return -1; | |
192 | } | |
193 | ||
ad5bb451 WD |
194 | return 0; |
195 | } | |
196 | ||
197 | #endif /* CONFIG_POST & CFG_POST_RTC */ | |
198 | #endif /* CONFIG_POST */ |