From 672bc4e090c9a2c655c28f8295e981609a1b84ba Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@googlemail.com>
Date: Tue, 5 Jul 2011 13:45:11 +0200
Subject: [PATCH] HID: wiimote: Register input device in wiimote hid driver

Register input device so the wiimote can report input events on
it. We do not use HIDINPUT because the wiimote does not provide any
descriptor table which might be used by HIDINPUT. So we avoid
having HIDINPUT parse the wiimote descriptor and create unrelated
or unknown event flags. Instead we register our own input device
that we have full control of.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-wiimote.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c
index ff7cf129710f..deaf23207812 100644
--- a/drivers/hid/hid-wiimote.c
+++ b/drivers/hid/hid-wiimote.c
@@ -10,7 +10,9 @@
  * any later version.
  */
 
+#include <linux/device.h>
 #include <linux/hid.h>
+#include <linux/input.h>
 #include <linux/module.h>
 #include "hid-ids.h"
 
@@ -19,8 +21,15 @@
 
 struct wiimote_data {
 	struct hid_device *hdev;
+	struct input_dev *input;
 };
 
+static int wiimote_input_event(struct input_dev *dev, unsigned int type,
+						unsigned int code, int value)
+{
+	return 0;
+}
+
 static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
 							u8 *raw_data, int size)
 {
@@ -38,9 +47,24 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev)
 	if (!wdata)
 		return NULL;
 
+	wdata->input = input_allocate_device();
+	if (!wdata->input) {
+		kfree(wdata);
+		return NULL;
+	}
+
 	wdata->hdev = hdev;
 	hid_set_drvdata(hdev, wdata);
 
+	input_set_drvdata(wdata->input, wdata);
+	wdata->input->event = wiimote_input_event;
+	wdata->input->dev.parent = &wdata->hdev->dev;
+	wdata->input->id.bustype = wdata->hdev->bus;
+	wdata->input->id.vendor = wdata->hdev->vendor;
+	wdata->input->id.product = wdata->hdev->product;
+	wdata->input->id.version = wdata->hdev->version;
+	wdata->input->name = WIIMOTE_NAME;
+
 	return wdata;
 }
 
@@ -73,10 +97,19 @@ static int wiimote_hid_probe(struct hid_device *hdev,
 		goto err;
 	}
 
+	ret = input_register_device(wdata->input);
+	if (ret) {
+		hid_err(hdev, "Cannot register input device\n");
+		goto err_stop;
+	}
+
 	hid_info(hdev, "New device registered\n");
 	return 0;
 
+err_stop:
+	hid_hw_stop(hdev);
 err:
+	input_free_device(wdata->input);
 	wiimote_destroy(wdata);
 	return ret;
 }
@@ -87,6 +120,7 @@ static void wiimote_hid_remove(struct hid_device *hdev)
 
 	hid_info(hdev, "Device removed\n");
 	hid_hw_stop(hdev);
+	input_unregister_device(wdata->input);
 	wiimote_destroy(wdata);
 }