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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2017 Google, Inc
*/
#include <common.h>
#include <dm.h>
#include <wdt.h>
#include <asm/gpio.h>
#include <asm/state.h>
#include <asm/test.h>
#include <dm/test.h>
#include <test/test.h>
#include <test/ut.h>
#include <linux/delay.h>
#include <watchdog.h>
/* Test that watchdog driver functions are called */
static int dm_test_wdt_base(struct unit_test_state *uts)
{
struct sandbox_state *state = state_get_current();
struct udevice *dev;
const u64 timeout = 42;
ut_assertok(uclass_get_device_by_driver(UCLASS_WDT,
DM_DRIVER_GET(wdt_sandbox), &dev));
ut_assertnonnull(dev);
ut_asserteq(0, state->wdt.counter);
ut_asserteq(false, state->wdt.running);
ut_assertok(wdt_start(dev, timeout, 0));
ut_asserteq(timeout, state->wdt.counter);
ut_asserteq(true, state->wdt.running);
uint reset_count = state->wdt.reset_count;
ut_assertok(wdt_reset(dev));
ut_asserteq(reset_count + 1, state->wdt.reset_count);
ut_asserteq(true, state->wdt.running);
ut_assertok(wdt_stop(dev));
ut_asserteq(false, state->wdt.running);
return 0;
}
DM_TEST(dm_test_wdt_base, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
static int dm_test_wdt_gpio(struct unit_test_state *uts)
{
/*
* The sandbox wdt gpio is "connected" to gpio bank a, offset
* 7. Use the sandbox back door to verify that the gpio-wdt
* driver behaves as expected.
*/
struct udevice *wdt, *gpio;
const u64 timeout = 42;
const int offset = 7;
int val;
ut_assertok(uclass_get_device_by_driver(UCLASS_WDT,
DM_DRIVER_GET(wdt_gpio), &wdt));
ut_assertnonnull(wdt);
ut_assertok(uclass_get_device_by_name(UCLASS_GPIO, "base-gpios", &gpio));
ut_assertnonnull(gpio);
ut_assertok(wdt_start(wdt, timeout, 0));
val = sandbox_gpio_get_value(gpio, offset);
ut_assertok(wdt_reset(wdt));
ut_asserteq(!val, sandbox_gpio_get_value(gpio, offset));
ut_assertok(wdt_reset(wdt));
ut_asserteq(val, sandbox_gpio_get_value(gpio, offset));
ut_asserteq(-ENOSYS, wdt_stop(wdt));
return 0;
}
DM_TEST(dm_test_wdt_gpio, UT_TESTF_SCAN_FDT);
static int dm_test_wdt_watchdog_reset(struct unit_test_state *uts)
{
struct sandbox_state *state = state_get_current();
struct udevice *gpio_wdt, *sandbox_wdt;
struct udevice *gpio;
const u64 timeout = 42;
const int offset = 7;
uint reset_count;
int val;
ut_assertok(uclass_get_device_by_driver(UCLASS_WDT,
DM_DRIVER_GET(wdt_gpio), &gpio_wdt));
ut_assertnonnull(gpio_wdt);
ut_assertok(uclass_get_device_by_driver(UCLASS_WDT,
DM_DRIVER_GET(wdt_sandbox), &sandbox_wdt));
ut_assertnonnull(sandbox_wdt);
ut_assertok(uclass_get_device_by_name(UCLASS_GPIO, "base-gpios", &gpio));
ut_assertnonnull(gpio);
/* Neither device should be "started", so watchdog_reset() should be a no-op. */
reset_count = state->wdt.reset_count;
val = sandbox_gpio_get_value(gpio, offset);
watchdog_reset();
ut_asserteq(reset_count, state->wdt.reset_count);
ut_asserteq(val, sandbox_gpio_get_value(gpio, offset));
/* Start both devices. */
ut_assertok(wdt_start(gpio_wdt, timeout, 0));
ut_assertok(wdt_start(sandbox_wdt, timeout, 0));
/* Make sure both devices have just been pinged. */
timer_test_add_offset(100);
watchdog_reset();
reset_count = state->wdt.reset_count;
val = sandbox_gpio_get_value(gpio, offset);
/* The gpio watchdog should be pinged, the sandbox one not. */
timer_test_add_offset(30);
watchdog_reset();
ut_asserteq(reset_count, state->wdt.reset_count);
ut_asserteq(!val, sandbox_gpio_get_value(gpio, offset));
/* After another ~30ms, both devices should get pinged. */
timer_test_add_offset(30);
watchdog_reset();
ut_asserteq(reset_count + 1, state->wdt.reset_count);
ut_asserteq(val, sandbox_gpio_get_value(gpio, offset));
return 0;
}
DM_TEST(dm_test_wdt_watchdog_reset, UT_TESTF_SCAN_FDT);
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