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ad5bb451 WD |
1 | /* |
2 | * (C) Copyright 2002 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
ad5bb451 WD |
6 | */ |
7 | ||
8 | #include <common.h> | |
9 | ||
10 | /* | |
11 | * RTC test | |
12 | * | |
13 | * The Real Time Clock (RTC) operation is verified by this test. | |
14 | * The following features are verified: | |
b73a19e1 YT |
15 | * o) RTC Power Fault |
16 | * This is verified by analyzing the rtc_get() return status. | |
ad5bb451 WD |
17 | * o) Time uniformity |
18 | * This is verified by reading RTC in polling within | |
19 | * a short period of time. | |
20 | * o) Passing month boundaries | |
21 | * This is checked by setting RTC to a second before | |
22 | * a month boundary and reading it after its passing the | |
23 | * boundary. The test is performed for both leap- and | |
24 | * nonleap-years. | |
25 | */ | |
26 | ||
ad5bb451 WD |
27 | #include <post.h> |
28 | #include <rtc.h> | |
29 | ||
6d0f6bcf | 30 | #if CONFIG_POST & CONFIG_SYS_POST_RTC |
ad5bb451 WD |
31 | |
32 | static int rtc_post_skip (ulong * diff) | |
33 | { | |
34 | struct rtc_time tm1; | |
35 | struct rtc_time tm2; | |
36 | ulong start1; | |
37 | ulong start2; | |
38 | ||
39 | rtc_get (&tm1); | |
40 | start1 = get_timer (0); | |
41 | ||
42 | while (1) { | |
43 | rtc_get (&tm2); | |
44 | start2 = get_timer (0); | |
45 | if (tm1.tm_sec != tm2.tm_sec) | |
46 | break; | |
47 | if (start2 - start1 > 1500) | |
48 | break; | |
49 | } | |
50 | ||
51 | if (tm1.tm_sec != tm2.tm_sec) { | |
52 | *diff = start2 - start1; | |
53 | ||
54 | return 0; | |
55 | } else { | |
56 | return -1; | |
57 | } | |
58 | } | |
59 | ||
60 | static void rtc_post_restore (struct rtc_time *tm, unsigned int sec) | |
61 | { | |
62 | time_t t = mktime (tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, | |
63 | tm->tm_min, tm->tm_sec) + sec; | |
64 | struct rtc_time ntm; | |
65 | ||
66 | to_tm (t, &ntm); | |
67 | ||
68 | rtc_set (&ntm); | |
69 | } | |
70 | ||
71 | int rtc_post_test (int flags) | |
72 | { | |
73 | ulong diff; | |
74 | unsigned int i; | |
75 | struct rtc_time svtm; | |
76 | static unsigned int daysnl[] = | |
77 | { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; | |
78 | static unsigned int daysl[] = | |
79 | { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; | |
80 | unsigned int ynl = 1999; | |
81 | unsigned int yl = 2000; | |
82 | unsigned int skipped = 0; | |
b73a19e1 YT |
83 | int reliable; |
84 | ||
85 | /* Time reliability */ | |
86 | reliable = rtc_get (&svtm); | |
ad5bb451 WD |
87 | |
88 | /* Time uniformity */ | |
89 | if (rtc_post_skip (&diff) != 0) { | |
90 | post_log ("Timeout while waiting for a new second !\n"); | |
91 | ||
92 | return -1; | |
93 | } | |
94 | ||
95 | for (i = 0; i < 5; i++) { | |
96 | if (rtc_post_skip (&diff) != 0) { | |
97 | post_log ("Timeout while waiting for a new second !\n"); | |
98 | ||
99 | return -1; | |
100 | } | |
101 | ||
102 | if (diff < 950 || diff > 1050) { | |
103 | post_log ("Invalid second duration !\n"); | |
104 | ||
105 | return -1; | |
106 | } | |
107 | } | |
108 | ||
109 | /* Passing month boundaries */ | |
110 | ||
111 | if (rtc_post_skip (&diff) != 0) { | |
112 | post_log ("Timeout while waiting for a new second !\n"); | |
113 | ||
114 | return -1; | |
115 | } | |
116 | rtc_get (&svtm); | |
117 | ||
118 | for (i = 0; i < 12; i++) { | |
119 | time_t t = mktime (ynl, i + 1, daysnl[i], 23, 59, 59); | |
120 | struct rtc_time tm; | |
121 | ||
122 | to_tm (t, &tm); | |
123 | rtc_set (&tm); | |
124 | ||
125 | skipped++; | |
126 | if (rtc_post_skip (&diff) != 0) { | |
127 | rtc_post_restore (&svtm, skipped); | |
128 | post_log ("Timeout while waiting for a new second !\n"); | |
129 | ||
130 | return -1; | |
131 | } | |
132 | ||
133 | rtc_get (&tm); | |
134 | if (tm.tm_mon == i + 1) { | |
135 | rtc_post_restore (&svtm, skipped); | |
136 | post_log ("Month %d boundary is not passed !\n", i + 1); | |
137 | ||
138 | return -1; | |
139 | } | |
140 | } | |
141 | ||
142 | for (i = 0; i < 12; i++) { | |
143 | time_t t = mktime (yl, i + 1, daysl[i], 23, 59, 59); | |
144 | struct rtc_time tm; | |
145 | ||
146 | to_tm (t, &tm); | |
147 | rtc_set (&tm); | |
148 | ||
149 | skipped++; | |
150 | if (rtc_post_skip (&diff) != 0) { | |
151 | rtc_post_restore (&svtm, skipped); | |
152 | post_log ("Timeout while waiting for a new second !\n"); | |
153 | ||
154 | return -1; | |
155 | } | |
156 | ||
157 | rtc_get (&tm); | |
158 | if (tm.tm_mon == i + 1) { | |
159 | rtc_post_restore (&svtm, skipped); | |
160 | post_log ("Month %d boundary is not passed !\n", i + 1); | |
161 | ||
162 | return -1; | |
163 | } | |
164 | } | |
165 | rtc_post_restore (&svtm, skipped); | |
166 | ||
b73a19e1 YT |
167 | /* If come here, then RTC operates correcty, check the correctness |
168 | * of the time it reports. | |
169 | */ | |
170 | if (reliable < 0) { | |
171 | post_log ("RTC Time is not reliable! Power fault? \n"); | |
172 | ||
173 | return -1; | |
174 | } | |
175 | ||
ad5bb451 WD |
176 | return 0; |
177 | } | |
178 | ||
6d0f6bcf | 179 | #endif /* CONFIG_POST & CONFIG_SYS_POST_RTC */ |