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-rw-r--r--drivers/input/tests/input_test.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/drivers/input/tests/input_test.c b/drivers/input/tests/input_test.c
new file mode 100644
index 0000000000..2fa5b725ae
--- /dev/null
+++ b/drivers/input/tests/input_test.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit test for the input core.
+ *
+ * Copyright (c) 2023 Red Hat Inc
+ */
+
+#include <linux/delay.h>
+#include <linux/input.h>
+
+#include <kunit/test.h>
+
+#define POLL_INTERVAL 100
+
+static int input_test_init(struct kunit *test)
+{
+ struct input_dev *input_dev;
+ int ret;
+
+ input_dev = input_allocate_device();
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, input_dev);
+
+ input_dev->name = "Test input device";
+ input_dev->id.bustype = BUS_VIRTUAL;
+ input_dev->id.vendor = 1;
+ input_dev->id.product = 1;
+ input_dev->id.version = 1;
+ input_set_capability(input_dev, EV_KEY, BTN_LEFT);
+ input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
+
+ ret = input_register_device(input_dev);
+ if (ret) {
+ input_free_device(input_dev);
+ KUNIT_ASSERT_FAILURE(test, "Register device failed: %d", ret);
+ }
+
+ test->priv = input_dev;
+
+ return 0;
+}
+
+static void input_test_exit(struct kunit *test)
+{
+ struct input_dev *input_dev = test->priv;
+
+ if (input_dev)
+ input_unregister_device(input_dev);
+}
+
+static void input_test_poll(struct input_dev *input) { }
+
+static void input_test_polling(struct kunit *test)
+{
+ struct input_dev *input_dev = test->priv;
+
+ /* Must fail because a poll handler has not been set-up yet */
+ KUNIT_ASSERT_EQ(test, input_get_poll_interval(input_dev), -EINVAL);
+
+ KUNIT_ASSERT_EQ(test, input_setup_polling(input_dev, input_test_poll), 0);
+
+ input_set_poll_interval(input_dev, POLL_INTERVAL);
+
+ /* Must succeed because poll handler was set-up and poll interval set */
+ KUNIT_ASSERT_EQ(test, input_get_poll_interval(input_dev), POLL_INTERVAL);
+}
+
+static void input_test_timestamp(struct kunit *test)
+{
+ const ktime_t invalid_timestamp = ktime_set(0, 0);
+ struct input_dev *input_dev = test->priv;
+ ktime_t *timestamp, time;
+
+ timestamp = input_get_timestamp(input_dev);
+ time = timestamp[INPUT_CLK_MONO];
+
+ /* The returned timestamp must always be valid */
+ KUNIT_ASSERT_EQ(test, ktime_compare(time, invalid_timestamp), 1);
+
+ time = ktime_get();
+ input_set_timestamp(input_dev, time);
+
+ timestamp = input_get_timestamp(input_dev);
+ /* The timestamp must be the same than set before */
+ KUNIT_ASSERT_EQ(test, ktime_compare(timestamp[INPUT_CLK_MONO], time), 0);
+}
+
+static void input_test_match_device_id(struct kunit *test)
+{
+ struct input_dev *input_dev = test->priv;
+ struct input_device_id id = { 0 };
+
+ /*
+ * Must match when the input device bus, vendor, product, version
+ * and events capable of handling are the same and fail to match
+ * otherwise.
+ */
+ id.flags = INPUT_DEVICE_ID_MATCH_BUS;
+ id.bustype = BUS_VIRTUAL;
+ KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
+
+ id.bustype = BUS_I2C;
+ KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
+
+ id.flags = INPUT_DEVICE_ID_MATCH_VENDOR;
+ id.vendor = 1;
+ KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
+
+ id.vendor = 2;
+ KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
+
+ id.flags = INPUT_DEVICE_ID_MATCH_PRODUCT;
+ id.product = 1;
+ KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
+
+ id.product = 2;
+ KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
+
+ id.flags = INPUT_DEVICE_ID_MATCH_VERSION;
+ id.version = 1;
+ KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
+
+ id.version = 2;
+ KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
+
+ id.flags = INPUT_DEVICE_ID_MATCH_EVBIT;
+ __set_bit(EV_KEY, id.evbit);
+ KUNIT_ASSERT_TRUE(test, input_match_device_id(input_dev, &id));
+
+ __set_bit(EV_ABS, id.evbit);
+ KUNIT_ASSERT_FALSE(test, input_match_device_id(input_dev, &id));
+}
+
+static void input_test_grab(struct kunit *test)
+{
+ struct input_dev *input_dev = test->priv;
+ struct input_handle test_handle;
+ struct input_handler handler;
+ struct input_handle handle;
+ struct input_device_id id;
+ int res;
+
+ handler.name = "handler";
+ handler.id_table = &id;
+
+ handle.dev = input_get_device(input_dev);
+ handle.name = dev_name(&input_dev->dev);
+ handle.handler = &handler;
+ res = input_grab_device(&handle);
+ KUNIT_ASSERT_TRUE(test, res == 0);
+
+ test_handle.dev = input_get_device(input_dev);
+ test_handle.name = dev_name(&input_dev->dev);
+ test_handle.handler = &handler;
+ res = input_grab_device(&test_handle);
+ KUNIT_ASSERT_EQ(test, res, -EBUSY);
+
+ input_release_device(&handle);
+ input_put_device(input_dev);
+ res = input_grab_device(&test_handle);
+ KUNIT_ASSERT_TRUE(test, res == 0);
+ input_put_device(input_dev);
+}
+
+static struct kunit_case input_tests[] = {
+ KUNIT_CASE(input_test_polling),
+ KUNIT_CASE(input_test_timestamp),
+ KUNIT_CASE(input_test_match_device_id),
+ KUNIT_CASE(input_test_grab),
+ { /* sentinel */ }
+};
+
+static struct kunit_suite input_test_suite = {
+ .name = "input_core",
+ .init = input_test_init,
+ .exit = input_test_exit,
+ .test_cases = input_tests,
+};
+
+kunit_test_suite(input_test_suite);
+
+MODULE_AUTHOR("Javier Martinez Canillas <javierm@redhat.com>");
+MODULE_LICENSE("GPL");