1/* rtc-test.c 2 * 3 * Tests for the Real Time Clock driver. 4 * 5 * Copyright (c) Larsen & Toubro Infotech Ltd., 2010 6 * Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved. 7 * 8 * Author : Silesh C V <Silesh.Vellattu@lntinfotech.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 18 * the GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 23 */ 24 25 26#include <sys/ioctl.h> 27#include <stdio.h> 28#include <stdlib.h> 29#include <fcntl.h> 30#include <unistd.h> 31#include <linux/rtc.h> 32#include <errno.h> 33#include <time.h> 34 35#include "test.h" 36#include "safe_macros.h" 37 38int rtc_fd = -1; 39char *TCID = "rtc01"; 40int TST_TOTAL = 3; 41 42static char *rtc_dev = "/dev/rtc"; 43static int dflag; 44static const option_t options[] = { 45 {"d:", &dflag, &rtc_dev}, 46 {NULL, NULL, NULL} 47}; 48 49static void help(void) 50{ 51 printf(" -d x rtc device node, default is %s\n", 52 rtc_dev); 53} 54 55/* Read and Alarm Tests : Read test reads the Date/time from RTC 56 * while Alarm test, sets the alarm to 5 seconds in future and 57 * waits for it to ring.The ioctls tested in these tests are 58 * RTC_RD_TIME, RTC_ALM_SET, RTC_ALM_READ, RTC_AIE_OFF */ 59 60void read_alarm_test(void) 61{ 62 struct rtc_time rtc_tm; 63 int ret; 64 unsigned long data; 65 fd_set rfds; 66 struct timeval tv; 67 68 tst_resm(TINFO, "RTC READ TEST:"); 69 70 /*Read RTC Time */ 71 ret = ioctl(rtc_fd, RTC_RD_TIME, &rtc_tm); 72 if (ret == -1) { 73 tst_resm(TFAIL | TERRNO, "RTC_RD_TIME ioctl failed"); 74 return; 75 } 76 77 tst_resm(TPASS, "RTC READ TEST Passed"); 78 79 tst_resm(TINFO, "Current RTC date/time is %d-%d-%d, %02d:%02d:%02d.", 80 rtc_tm.tm_mday, rtc_tm.tm_mon + 1, rtc_tm.tm_year + 1900, 81 rtc_tm.tm_hour, rtc_tm.tm_min, rtc_tm.tm_sec); 82 83 tst_resm(TINFO, "RTC ALARM TEST :"); 84 85 /*set Alarm to 5 Seconds */ 86 rtc_tm.tm_sec += 5; 87 if (rtc_tm.tm_sec >= 60) { 88 rtc_tm.tm_sec %= 60; 89 rtc_tm.tm_min++; 90 } 91 92 if (rtc_tm.tm_min == 60) { 93 rtc_tm.tm_min = 0; 94 rtc_tm.tm_hour++; 95 } 96 97 if (rtc_tm.tm_hour == 24) 98 rtc_tm.tm_hour = 0; 99 100 ret = ioctl(rtc_fd, RTC_ALM_SET, &rtc_tm); 101 if (ret == -1) { 102 if (errno == EINVAL) 103 tst_resm(TCONF | TERRNO, "RTC_ALM_SET not supported"); 104 else 105 tst_resm(TFAIL | TERRNO, "RTC_ALM_SET ioctl failed"); 106 return; 107 } 108 109 /*Read current alarm time */ 110 ret = ioctl(rtc_fd, RTC_ALM_READ, &rtc_tm); 111 if (ret == -1) { 112 if (errno == EINVAL) { 113 tst_resm(TCONF | TERRNO, "RTC_ALM_READ not suported"); 114 } else { 115 tst_resm(TFAIL | TERRNO, "RTC_ALM_READ ioctl failed"); 116 return; 117 } 118 } else { 119 tst_resm(TINFO, "Alarm time set to %02d:%02d:%02d.", 120 rtc_tm.tm_hour, rtc_tm.tm_min, rtc_tm.tm_sec); 121 } 122 123 /* Enable alarm interrupts */ 124 ret = ioctl(rtc_fd, RTC_AIE_ON, 0); 125 if (ret == -1) { 126 tst_resm(TINFO | TERRNO, "RTC_AIE_ON ioctl failed"); 127 return; 128 } 129 130 tst_resm(TINFO, "Waiting 5 seconds for the alarm..."); 131 132 tv.tv_sec = 6; /*set 6 seconds as the time out */ 133 tv.tv_usec = 0; 134 135 FD_ZERO(&rfds); 136 FD_SET(rtc_fd, &rfds); 137 138 ret = select(rtc_fd + 1, &rfds, NULL, NULL, &tv); /*wait for alarm */ 139 140 if (ret == -1) { 141 tst_resm(TFAIL | TERRNO, "select failed"); 142 return; 143 } else if (ret) { 144 ret = read(rtc_fd, &data, sizeof(unsigned long)); 145 if (ret == -1) { 146 tst_resm(TFAIL | TERRNO, "read failed"); 147 return; 148 } 149 tst_resm(TINFO, "Alarm rang."); 150 } else { 151 tst_resm(TFAIL, "Timed out waiting for the alarm"); 152 return; 153 } 154 155 /* Disable alarm interrupts */ 156 ret = ioctl(rtc_fd, RTC_AIE_OFF, 0); 157 if (ret == -1) { 158 tst_resm(TFAIL | TERRNO, "RTC_AIE_OFF ioctl failed"); 159 return; 160 } 161 tst_resm(TPASS, "RTC ALARM TEST Passed"); 162} 163 164/* Update_interrupts_test :Once the Update interrupts is enabled, 165 * the RTC gives interrupts (1/sec) on the interrupts line(if the rtc 166 * has one). This is tested by enabling the update interrupts 167 * and then waiting for 5 interrupts.*/ 168 169void update_interrupts_test(void) 170{ 171 int ret, i; 172 unsigned long data; 173 fd_set rfds; 174 struct timeval tv; 175 176 tst_resm(TINFO, "RTC UPDATE INTERRUPTS TEST :"); 177 /*Turn on update interrupts */ 178 ret = ioctl(rtc_fd, RTC_UIE_ON, 0); 179 if (ret == -1) { 180 if (errno == EINVAL) 181 tst_resm(TCONF | TERRNO, "RTC_UIE_ON not supported"); 182 else 183 tst_resm(TFAIL | TERRNO, "RTC_UIE_ON ioctl failed"); 184 return; 185 } 186 187 tst_resm(TINFO, "Waiting for 5 update interrupts..."); 188 for (i = 1; i < 6; i++) { 189 190 tv.tv_sec = 2; /*2 sec time out for each interrupt */ 191 tv.tv_usec = 0; 192 193 FD_ZERO(&rfds); 194 FD_SET(rtc_fd, &rfds); 195 196 ret = select(rtc_fd + 1, &rfds, NULL, NULL, &tv); 197 if (ret == -1) { 198 tst_resm(TFAIL | TERRNO, "select failed"); 199 return; 200 } else if (ret) { 201 ret = read(rtc_fd, &data, sizeof(unsigned long)); 202 if (ret == -1) { 203 tst_resm(TFAIL | TERRNO, "read failed"); 204 return; 205 } 206 tst_resm(TINFO, "Update interrupt %d", i); 207 } else { 208 tst_resm(TFAIL, 209 "Timed out waiting for the update interrupt"); 210 return; 211 } 212 } 213 214 /* Turn off update interrupts */ 215 ret = ioctl(rtc_fd, RTC_UIE_OFF, 0); 216 if (ret == -1) { 217 tst_resm(TFAIL | TERRNO, "RTC_UIE_OFF ioctl failed"); 218 return; 219 } 220 tst_resm(TPASS, "RTC UPDATE INTERRUPTS TEST Passed"); 221} 222 223int main(int argc, char *argv[]) 224{ 225 tst_parse_opts(argc, argv, options, help); 226 227 tst_require_root(); 228 229 if (access(rtc_dev, F_OK) == -1) 230 tst_brkm(TCONF, NULL, "couldn't find rtc device '%s'", rtc_dev); 231 232 rtc_fd = SAFE_OPEN(NULL, rtc_dev, O_RDONLY); 233 234 /*Read and alarm tests */ 235 read_alarm_test(); 236 237 /*Update interrupts test */ 238 update_interrupts_test(); 239 240 close(rtc_fd); 241 242 tst_resm(TINFO, "RTC Tests Done!"); 243 tst_exit(); 244} 245