linux-kernel - [PATCH 3/5] HID: LG: Prevent the Logitech Gaming Wheels deadzone

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Date:	Tue, 19 Feb 2013 20:25:12 -0700
From:	Simon Wood <simon@...gewell.org>
To:	linux-input@...r.kernel.org
Cc:	Jiri Kosina <jkosina@...e.cz>, linux-kernel@...r.kernel.org,
	simon@...gewell.org
Subject: [PATCH 3/5] HID: LG: Prevent the Logitech Gaming Wheels deadzone

This patch ensures that the Logitech wheels are not initialised with
default fuzz/flat values, by marking them as multiaxis devices (rather
than joysticks).

Signed-off-by: Simon Wood <simon@...gewell.org>
---
 drivers/hid/hid-lg.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index c065598..5d3c861 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -479,6 +479,26 @@ static int lg_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 			 usage->type == EV_REL || usage->type == EV_ABS))
 		clear_bit(usage->code, *bit);
 
+	/* Ensure that Logitech wheels are not given a default fuzz/flat value */
+	if (usage->type == EV_ABS && (usage->code == ABS_X ||
+			usage->code == ABS_Y || usage->code == ABS_Z ||
+			usage->code == ABS_RZ)) {
+		switch (hdev->product) {
+		case USB_DEVICE_ID_LOGITECH_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_WII_WHEEL:
+		case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
+			field->application = HID_GD_MULTIAXIS;
+			break;
+		default:
+			break;
+		}
+	}
+
 	return 0;
 }
 
-- 
1.7.10.4

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