1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/input/evbug.c b/drivers/input/evbug.c
new file mode 100644
index 0000000000..e47bdf9208
--- /dev/null
+++ b/drivers/input/evbug.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ */
+
+/*
+ *  Input driver event debug module - dumps all events into syslog
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("Input driver event debug module");
+MODULE_LICENSE("GPL");
+
+static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+	printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
+	       dev_name(&handle->dev->dev), type, code, value);
+}
+
+static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
+			 const struct input_device_id *id)
+{
+	struct input_handle *handle;
+	int error;
+
+	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
+	if (!handle)
+		return -ENOMEM;
+
+	handle->dev = dev;
+	handle->handler = handler;
+	handle->name = "evbug";
+
+	error = input_register_handle(handle);
+	if (error)
+		goto err_free_handle;
+
+	error = input_open_device(handle);
+	if (error)
+		goto err_unregister_handle;
+
+	printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),
+	       dev_name(&dev->dev),
+	       dev->name ?: "unknown",
+	       dev->phys ?: "unknown");
+
+	return 0;
+
+ err_unregister_handle:
+	input_unregister_handle(handle);
+ err_free_handle:
+	kfree(handle);
+	return error;
+}
+
+static void evbug_disconnect(struct input_handle *handle)
+{
+	printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
+	       dev_name(&handle->dev->dev));
+
+	input_close_device(handle);
+	input_unregister_handle(handle);
+	kfree(handle);
+}
+
+static const struct input_device_id evbug_ids[] = {
+	{ .driver_info = 1 },	/* Matches all devices */
+	{ },			/* Terminating zero entry */
+};
+
+MODULE_DEVICE_TABLE(input, evbug_ids);
+
+static struct input_handler evbug_handler = {
+	.event =	evbug_event,
+	.connect =	evbug_connect,
+	.disconnect =	evbug_disconnect,
+	.name =		"evbug",
+	.id_table =	evbug_ids,
+};
+
+static int __init evbug_init(void)
+{
+	return input_register_handler(&evbug_handler);
+}
+
+static void __exit evbug_exit(void)
+{
+	input_unregister_handler(&evbug_handler);
+}
+
+module_init(evbug_init);
+module_exit(evbug_exit);