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/* Copyright 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Test thermal engine.
*/
#include "common.h"
#include "console.h"
#include "fan.h"
#include "hooks.h"
#include "host_command.h"
#include "printf.h"
#include "temp_sensor.h"
#include "test_util.h"
#include "thermal.h"
#include "timer.h"
#include "util.h"
#define FAN_RPM(fan) fans[fan].rpm
/*****************************************************************************/
/* Tests */
void set_thermal_control_enabled(int fan, int enable);
static int test_fan(void)
{
/* "actual" fan speed from board/host/fan.c */
extern int mock_rpm;
sleep(2);
/* Fans initialize disabled. */
TEST_ASSERT(fan_get_rpm_actual(0) == 0);
set_thermal_control_enabled(0, 1);
/*
* fan_set_percent_needed() is normally called once a second by the
* thermal task, but we're not using a thermal test in this test so
* we can dink around with the fans without having to wait. The host
* implementation just sets mock_rpm to whatever it's asked for.
*/
/* Off */
fan_set_percent_needed(0, 0);
TEST_ASSERT(fan_get_rpm_actual(0) == 0);
fan_set_percent_needed(0, 0);
TEST_ASSERT(fan_get_rpm_actual(0) == 0);
/* On, but just barely */
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_start);
/* fan is above min speed now, so should be set to min */
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_min);
/* Full speed */
fan_set_percent_needed(0, 100);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_max);
fan_set_percent_needed(0, 100);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_max);
/* Slow again */
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_min);
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_min);
/* Off */
fan_set_percent_needed(0, 0);
TEST_ASSERT(fan_get_rpm_actual(0) == 0);
fan_set_percent_needed(0, 0);
TEST_ASSERT(fan_get_rpm_actual(0) == 0);
/* On, but just barely */
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_start);
/* Force the mock_rpm to be slow, to simulate dragging */
mock_rpm = FAN_RPM(0)->rpm_min - 105;
/* It should keep trying for the start speed */
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_start);
/* But we have to keep forcing the mock_rpm back down */
mock_rpm = FAN_RPM(0)->rpm_min - 105;
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_start);
/* Now let it turn just under rpm_min. Should be okay there. */
mock_rpm = FAN_RPM(0)->rpm_min - 10;
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_min);
/* Let it go a little faster, still okay */
mock_rpm = FAN_RPM(0)->rpm_min + 10;
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_min);
/* But if it drops too low, it should go back to the start speed */
mock_rpm = FAN_RPM(0)->rpm_min - 105;
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_start);
/* And then relax */
fan_set_percent_needed(0, 1);
TEST_ASSERT(fan_get_rpm_actual(0) == FAN_RPM(0)->rpm_min);
return EC_SUCCESS;
}
void run_test(int argc, char **argv)
{
RUN_TEST(test_fan);
test_print_result();
}
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