diff options
Diffstat (limited to 'tests/rtc-test.c')
| -rw-r--r-- | tests/rtc-test.c | 82 |
1 files changed, 81 insertions, 1 deletions
diff --git a/tests/rtc-test.c b/tests/rtc-test.c index 798cf5e285..d7a96cbd79 100644 --- a/tests/rtc-test.c +++ b/tests/rtc-test.c @@ -325,6 +325,30 @@ static void set_datetime_bcd(int h, int min, int s, int d, int m, int y) cmos_write(RTC_DAY_OF_MONTH, d); } +static void set_datetime_dec(int h, int min, int s, int d, int m, int y) +{ + cmos_write(RTC_HOURS, h); + cmos_write(RTC_MINUTES, min); + cmos_write(RTC_SECONDS, s); + cmos_write(RTC_YEAR, y % 100); + cmos_write(RTC_CENTURY, y / 100); + cmos_write(RTC_MONTH, m); + cmos_write(RTC_DAY_OF_MONTH, d); +} + +static void set_datetime(int mode, int h, int min, int s, int d, int m, int y) +{ + cmos_write(RTC_REG_B, mode); + + cmos_write(RTC_REG_A, 0x76); + if (mode & REG_B_DM) { + set_datetime_dec(h, min, s, d, m, y); + } else { + set_datetime_bcd(h, min, s, d, m, y); + } + cmos_write(RTC_REG_A, 0x26); +} + #define assert_time(h, m, s) \ do { \ g_assert_cmpint(cmos_read(RTC_HOURS), ==, h); \ @@ -559,6 +583,60 @@ static void register_b_set_flag(void) assert_datetime_bcd(0x02, 0x04, 0x59, 0x02, 0x02, 0x2011); } +static void divider_reset(void) +{ + /* Enable binary-coded decimal (BCD) mode in Register B*/ + cmos_write(RTC_REG_B, REG_B_24H); + + /* Enter divider reset */ + cmos_write(RTC_REG_A, 0x76); + set_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011); + + assert_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011); + + /* Since divider reset flag is still enabled, these are equality checks. */ + clock_step(1000000000LL); + assert_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011); + + /* The first update ends 500 ms after divider reset */ + cmos_write(RTC_REG_A, 0x26); + clock_step(500000000LL - UIP_HOLD_LENGTH - 1); + g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0); + assert_datetime_bcd(0x02, 0x04, 0x58, 0x02, 0x02, 0x2011); + + clock_step(1); + g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, !=, 0); + clock_step(UIP_HOLD_LENGTH); + g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0); + + assert_datetime_bcd(0x02, 0x04, 0x59, 0x02, 0x02, 0x2011); +} + +static void uip_stuck(void) +{ + set_datetime(REG_B_24H, 0x02, 0x04, 0x58, 0x02, 0x02, 0x2011); + + /* The first update ends 500 ms after divider reset */ + (void)cmos_read(RTC_REG_C); + clock_step(500000000LL); + g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0); + assert_datetime_bcd(0x02, 0x04, 0x59, 0x02, 0x02, 0x2011); + + /* UF is now set. */ + cmos_write(RTC_HOURS_ALARM, 0x02); + cmos_write(RTC_MINUTES_ALARM, 0xC0); + cmos_write(RTC_SECONDS_ALARM, 0xC0); + + /* Because the alarm will fire soon, reading register A will latch UIP. */ + clock_step(1000000000LL - UIP_HOLD_LENGTH / 2); + g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, !=, 0); + + /* Move the alarm far away. This must not cause UIP to remain stuck! */ + cmos_write(RTC_HOURS_ALARM, 0x03); + clock_step(UIP_HOLD_LENGTH); + g_assert_cmpint(cmos_read(RTC_REG_A) & REG_A_UIP, ==, 0); +} + #define RTC_PERIOD_CODE1 13 /* 8 Hz */ #define RTC_PERIOD_CODE2 15 /* 2 Hz */ @@ -625,7 +703,9 @@ int main(int argc, char **argv) qtest_add_func("/rtc/basic/bcd-12h", basic_12h_bcd); qtest_add_func("/rtc/set-year/20xx", set_year_20xx); qtest_add_func("/rtc/set-year/1980", set_year_1980); - qtest_add_func("/rtc/misc/register_b_set_flag", register_b_set_flag); + qtest_add_func("/rtc/update/register_b_set_flag", register_b_set_flag); + qtest_add_func("/rtc/update/divider-reset", divider_reset); + qtest_add_func("/rtc/update/uip-stuck", uip_stuck); qtest_add_func("/rtc/misc/fuzz-registers", fuzz_registers); qtest_add_func("/rtc/periodic/interrupt", periodic_timer); |