[PATCH 3/4] HID: hid-lg4ff: Set absolute axes parametes on DFP

[PATCH 3/4] HID: hid-lg4ff: Set absolute axes parametes on DFP

[Michal Malý]

The lg4ff driver doesn't fill the "input_absinfo" struct so it is left
with default values. Applications with rely on information in this struct
therefore do not work correctly with the wheel.

Other Logitech wheels probably need this fix too, but again I do not have
enough information to write it.

Signed-off-by: Michal Malý <madcatxster@gmail.com>
---
From e7fdafab7b67ae62e46f4323cbca646cd46a7266 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Mal=C3=BD?= <madcatxster@gmail.com>
Date: Sun, 23 Sep 2012 23:56:39 +0200
Subject: [PATCH 3/4] Set absolute axes parameters manually on DFP.

---
 drivers/hid/hid-lg4ff.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index fe15b3b..7007a12 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -43,6 +43,11 @@
 #define G27_REV_MAJ 0x12
 #define G27_REV_MIN 0x38
 
+#define DFP_X_MIN 0
+#define DFP_X_MAX 16383
+#define DFP_PEDAL_MIN 0
+#define DFP_PEDAL_MAX 255
+
 #define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
 
 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
@@ -593,6 +598,18 @@ int lg4ff_init(struct hid_device *hid)
 		return error;
 	dbg_hid("sysfs interface created\n");
 
+	/* Set default axes parameters */
+	switch (lg4ff_devices[i].product_id) {
+	case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
+		dbg_hid("Setting axes parameters for Driving Force Pro\n");
+		input_set_abs_params(dev, ABS_X, DFP_X_MIN, DFP_X_MAX, 0, 0);
+		input_set_abs_params(dev, ABS_Y, DFP_PEDAL_MIN, DFP_PEDAL_MAX, 0, 0);
+		input_set_abs_params(dev, ABS_RZ, DFP_PEDAL_MIN, DFP_PEDAL_MAX, 0, 0);
+		break;
+	default:
+		break; /* Should never happen */
+	}
+
 	/* Set the maximum range to start with */
 	entry->range = entry->max_range;
 	if (entry->set_range != NULL)
-- 
1.7.12.1

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