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Wolfgang Denkad5bb452007-03-06 18:08:43 +01001/*
2 * (C) Copyright 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
Wolfgang Denkad5bb452007-03-06 18:08:43 +01006 */
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:
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030015 * o) RTC Power Fault
16 * This is verified by analyzing the rtc_get() return status.
Wolfgang Denkad5bb452007-03-06 18:08:43 +010017 * 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
Wolfgang Denkad5bb452007-03-06 18:08:43 +010027#include <post.h>
28#include <rtc.h>
29
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020030#if CONFIG_POST & CONFIG_SYS_POST_RTC
Wolfgang Denkad5bb452007-03-06 18:08:43 +010031
32static 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
60static 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
71int 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;
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +030083 int reliable;
84
85 /* Time reliability */
86 reliable = rtc_get (&svtm);
Wolfgang Denkad5bb452007-03-06 18:08:43 +010087
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
Yuri Tikhonovb73a19e2008-03-20 17:56:04 +0300167 /* 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
Wolfgang Denkad5bb452007-03-06 18:08:43 +0100176 return 0;
177}
178
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200179#endif /* CONFIG_POST & CONFIG_SYS_POST_RTC */