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/* Copyright (c) 2013 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 GPIO extpower module.
*/
#include "adc.h"
#include "common.h"
#include "console.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "test_util.h"
#include "timer.h"
#include "util.h"
#include "chipset.h"
#include "chipset_x86_common.h"
/* Normally private stuff from the modules we're going to test */
#include "adapter_externs.h"
/* Local state */
static int mock_ac;
static int mock_id;
static int mock_current;
static struct power_state_context ctx;
static void test_reset_mocks(void)
{
mock_ac = 0;
mock_id = 0;
mock_current = 0;
memset(&ctx, 0, sizeof(ctx));
}
/* Mocked functions from the rest of the EC */
int gpio_get_level(enum gpio_signal signal)
{
if (signal == GPIO_AC_PRESENT)
return mock_ac;
return 0;
}
int adc_read_channel(enum adc_channel ch)
{
switch (ch) {
case ADC_AC_ADAPTER_ID_VOLTAGE:
return mock_id;
case ADC_CH_CHARGER_CURRENT:
return mock_current;
default:
break;
}
return 0;
}
int charger_set_input_current(int input_current)
{
return EC_SUCCESS;
}
int charger_get_option(int *option)
{
return EC_SUCCESS;
}
int charger_set_option(int option)
{
return EC_SUCCESS;
}
/* Local functions to control the mocked functions. */
static void change_ac(int val)
{
mock_ac = val;
extpower_interrupt(GPIO_AC_PRESENT);
msleep(50);
}
static void set_id(int val)
{
mock_id = val;
}
/* And the tests themselves... */
/*
* Run through the known ID ranges, making sure that values inside are
* correctly identified, and values outside are not. We'll skip the default
* ADAPTER_UNKNOWN range, of course.
*
* NOTE: This assumes that the ranges have a gap between them.
*/
static int test_identification(void)
{
int i;
test_reset_mocks();
for (i = 1; i < NUM_ADAPTER_TYPES; i++) {
change_ac(0);
TEST_ASSERT(ac_adapter == ADAPTER_UNKNOWN);
set_id(ad_id_vals[i].lo - 1);
change_ac(1);
TEST_ASSERT(ac_adapter == ADAPTER_UNKNOWN);
change_ac(0);
TEST_ASSERT(ac_adapter == ADAPTER_UNKNOWN);
set_id(ad_id_vals[i].lo);
change_ac(1);
TEST_ASSERT(ac_adapter == i);
change_ac(0);
TEST_ASSERT(ac_adapter == ADAPTER_UNKNOWN);
set_id(ad_id_vals[i].hi);
change_ac(1);
TEST_ASSERT(ac_adapter == i);
change_ac(0);
TEST_ASSERT(ac_adapter == ADAPTER_UNKNOWN);
set_id(ad_id_vals[i].hi + 1);
change_ac(1);
TEST_ASSERT(ac_adapter == ADAPTER_UNKNOWN);
}
return EC_SUCCESS;
}
/* Helper function */
static void test_turbo_init(void)
{
/* Battery is awake and in good shape */
ctx.curr.error = 0;
ctx.curr.batt.state_of_charge = 25;
/* Adapter is present and known */
set_id(ad_id_vals[1].lo + 1);
change_ac(1);
}
/* Test all the things that can turn turbo mode on and off */
static int test_turbo(void)
{
test_reset_mocks();
/* There's only one path that can enable turbo. Check it first. */
test_turbo_init();
watch_adapter_closely(&ctx);
TEST_ASSERT(ac_turbo == 1);
/* Now test things that turn turbo off. */
test_turbo_init();
ctx.curr.error = 1;
watch_adapter_closely(&ctx);
TEST_ASSERT(ac_turbo == 0);
test_turbo_init();
ctx.curr.batt.state_of_charge = 5;
watch_adapter_closely(&ctx);
TEST_ASSERT(ac_turbo == 0);
test_turbo_init();
set_id(ad_id_vals[1].lo - 1);
change_ac(1);
watch_adapter_closely(&ctx);
TEST_ASSERT(ac_turbo == 0);
test_turbo_init();
change_ac(0);
watch_adapter_closely(&ctx);
TEST_ASSERT(ac_turbo == -1);
return EC_SUCCESS;
}
/* Check the detection logic on one set of struct adapter_limits */
static int test_thresholds_sequence(int entry)
{
struct adapter_limits *lim = &ad_limits[ac_adapter][ac_turbo][entry];
int longtime = MAX(lim->lo_cnt, lim->hi_cnt) + 2;
int i;
/* reset, by staying low for a long time */
mock_current = lim->lo_val - 1;
for (i = 1; i < longtime; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 0);
TEST_ASSERT(ap_is_throttled == 0);
/* midrange for a long time shouldn't do anything */
mock_current = (lim->lo_val + lim->hi_val) / 2;
for (i = 1; i < longtime; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 0);
TEST_ASSERT(ap_is_throttled == 0);
/* above high limit for not quite long enough */
mock_current = lim->hi_val + 1;
for (i = 1; i < lim->hi_cnt; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 0);
TEST_ASSERT(ap_is_throttled == 0);
/* drop below the high limit once */
mock_current = lim->hi_val - 1;
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 0);
TEST_ASSERT(ap_is_throttled == 0);
/* now back up - that should have reset the count */
mock_current = lim->hi_val + 1;
for (i = 1; i < lim->hi_cnt; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 0);
TEST_ASSERT(ap_is_throttled == 0);
/* one more ought to do it */
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 1);
TEST_ASSERT(ap_is_throttled == 1);
/* going midrange for a long time shouldn't change anything */
mock_current = (lim->lo_val + lim->hi_val) / 2;
for (i = 1; i < longtime; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 1);
TEST_ASSERT(ap_is_throttled == 1);
/* below low limit for not quite long enough */
mock_current = lim->lo_val - 1;
for (i = 1; i < lim->lo_cnt; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 1);
TEST_ASSERT(ap_is_throttled == 1);
/* back above the low limit once */
mock_current = lim->lo_val + 1;
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 1);
TEST_ASSERT(ap_is_throttled == 1);
/* now back down - that should have reset the count */
mock_current = lim->lo_val - 1;
for (i = 1; i < lim->lo_cnt; i++)
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 1);
TEST_ASSERT(ap_is_throttled == 1);
/* One more ought to do it */
check_threshold(mock_current, lim);
TEST_ASSERT(lim->triggered == 0);
TEST_ASSERT(ap_is_throttled == 0);
return EC_SUCCESS;
}
/*
* Check all sets of thresholds. This probably doesn't add much value, but at
* least it ensures that they're somewhat sane.
*/
static int test_thresholds(void)
{
int e;
for (ac_adapter = 0; ac_adapter < NUM_ADAPTER_TYPES; ac_adapter++)
for (ac_turbo = 0; ac_turbo < NUM_AC_TURBO_STATES; ac_turbo++)
for (e = 0; e < NUM_AC_THRESHOLDS; e++)
TEST_ASSERT(EC_SUCCESS ==
test_thresholds_sequence(e));
return EC_SUCCESS;
}
void run_test(void)
{
test_reset();
RUN_TEST(test_identification);
RUN_TEST(test_turbo);
RUN_TEST(test_thresholds);
test_print_result();
}
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