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// SPDX-License-Identifier: GPL-2.0
/*
* Real Time Clock Driver Test Program
*
* Copyright (c) 2018 Alexandre Belloni <alexandre.belloni@bootlin.com>
*/
#include <errno.h>
#include <fcntl.h>
#include <linux/rtc.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "../kselftest_harness.h"
#define NUM_UIE 3
#define ALARM_DELTA 3
static char *rtc_file = "/dev/rtc0";
FIXTURE(rtc) {
int fd;
};
FIXTURE_SETUP(rtc) {
self->fd = open(rtc_file, O_RDONLY);
ASSERT_NE(-1, self->fd);
}
FIXTURE_TEARDOWN(rtc) {
close(self->fd);
}
TEST_F(rtc, date_read) {
int rc;
struct rtc_time rtc_tm;
/* Read the RTC time/date */
rc = ioctl(self->fd, RTC_RD_TIME, &rtc_tm);
ASSERT_NE(-1, rc);
TH_LOG("Current RTC date/time is %02d/%02d/%02d %02d:%02d:%02d.",
rtc_tm.tm_mday, rtc_tm.tm_mon + 1, rtc_tm.tm_year + 1900,
rtc_tm.tm_hour, rtc_tm.tm_min, rtc_tm.tm_sec);
}
TEST_F(rtc, uie_read) {
int i, rc, irq = 0;
unsigned long data;
/* Turn on update interrupts */
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip update IRQs not supported.");
return;
}
for (i = 0; i < NUM_UIE; i++) {
/* This read will block */
rc = read(self->fd, &data, sizeof(data));
ASSERT_NE(-1, rc);
irq++;
}
EXPECT_EQ(NUM_UIE, irq);
rc = ioctl(self->fd, RTC_UIE_OFF, 0);
ASSERT_NE(-1, rc);
}
TEST_F(rtc, uie_select) {
int i, rc, irq = 0;
unsigned long data;
/* Turn on update interrupts */
rc = ioctl(self->fd, RTC_UIE_ON, 0);
if (rc == -1) {
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip update IRQs not supported.");
return;
}
for (i = 0; i < NUM_UIE; i++) {
struct timeval tv = { .tv_sec = 2 };
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(self->fd, &readfds);
/* The select will wait until an RTC interrupt happens. */
rc = select(self->fd + 1, &readfds, NULL, NULL, &tv);
ASSERT_NE(-1, rc);
ASSERT_NE(0, rc);
/* This read won't block */
rc = read(self->fd, &data, sizeof(unsigned long));
ASSERT_NE(-1, rc);
irq++;
}
EXPECT_EQ(NUM_UIE, irq);
rc = ioctl(self->fd, RTC_UIE_OFF, 0);
ASSERT_NE(-1, rc);
}
TEST_F(rtc, alarm_alm_set) {
struct timeval tv = { .tv_sec = ALARM_DELTA + 2 };
unsigned long data;
struct rtc_time tm;
fd_set readfds;
time_t secs, new;
int rc;
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);
secs = timegm((struct tm *)&tm) + ALARM_DELTA;
gmtime_r(&secs, (struct tm *)&tm);
rc = ioctl(self->fd, RTC_ALM_SET, &tm);
if (rc == -1) {
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip alarms are not supported.");
return;
}
rc = ioctl(self->fd, RTC_ALM_READ, &tm);
ASSERT_NE(-1, rc);
TH_LOG("Alarm time now set to %02d:%02d:%02d.",
tm.tm_hour, tm.tm_min, tm.tm_sec);
/* Enable alarm interrupts */
rc = ioctl(self->fd, RTC_AIE_ON, 0);
ASSERT_NE(-1, rc);
FD_ZERO(&readfds);
FD_SET(self->fd, &readfds);
rc = select(self->fd + 1, &readfds, NULL, NULL, &tv);
ASSERT_NE(-1, rc);
EXPECT_NE(0, rc);
/* Disable alarm interrupts */
rc = ioctl(self->fd, RTC_AIE_OFF, 0);
ASSERT_NE(-1, rc);
if (rc == 0)
return;
rc = read(self->fd, &data, sizeof(unsigned long));
ASSERT_NE(-1, rc);
TH_LOG("data: %lx", data);
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);
new = timegm((struct tm *)&tm);
ASSERT_EQ(new, secs);
}
TEST_F(rtc, alarm_wkalm_set) {
struct timeval tv = { .tv_sec = ALARM_DELTA + 2 };
struct rtc_wkalrm alarm = { 0 };
struct rtc_time tm;
unsigned long data;
fd_set readfds;
time_t secs, new;
int rc;
rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time);
ASSERT_NE(-1, rc);
secs = timegm((struct tm *)&alarm.time) + ALARM_DELTA;
gmtime_r(&secs, (struct tm *)&alarm.time);
alarm.enabled = 1;
rc = ioctl(self->fd, RTC_WKALM_SET, &alarm);
if (rc == -1) {
ASSERT_EQ(EINVAL, errno);
TH_LOG("skip alarms are not supported.");
return;
}
rc = ioctl(self->fd, RTC_WKALM_RD, &alarm);
ASSERT_NE(-1, rc);
TH_LOG("Alarm time now set to %02d/%02d/%02d %02d:%02d:%02d.",
alarm.time.tm_mday, alarm.time.tm_mon + 1,
alarm.time.tm_year + 1900, alarm.time.tm_hour,
alarm.time.tm_min, alarm.time.tm_sec);
FD_ZERO(&readfds);
FD_SET(self->fd, &readfds);
rc = select(self->fd + 1, &readfds, NULL, NULL, &tv);
ASSERT_NE(-1, rc);
EXPECT_NE(0, rc);
rc = read(self->fd, &data, sizeof(unsigned long));
ASSERT_NE(-1, rc);
rc = ioctl(self->fd, RTC_RD_TIME, &tm);
ASSERT_NE(-1, rc);
new = timegm((struct tm *)&tm);
ASSERT_EQ(new, secs);
}
static void __attribute__((constructor))
__constructor_order_last(void)
{
if (!__constructor_order)
__constructor_order = _CONSTRUCTOR_ORDER_BACKWARD;
}
int main(int argc, char **argv)
{
switch (argc) {
case 2:
rtc_file = argv[1];
/* FALLTHROUGH */
case 1:
break;
default:
fprintf(stderr, "usage: %s [rtcdev]\n", argv[0]);
return 1;
}
return test_harness_run(argc, argv);
}
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