[PATCH] HID: Fix reporting of nonexistent HWheel for Elecom BM084 (bluetooth mouse).

[Richard Nauber <richard.nauber@googlemail.com>]

HID: Fix reporting of nonexistent HWheel for Elecom BM084 (bluetooth mouse).

This patch removes the annoying feature of Elecoms BM084 to constantly
scroll to the right.
The device can be found at:
http://www.dealextreme.com/details.dx/sku.15402

Signed-off-by:  Richard Nauber <Richard.Nauber@gmail.com>
---
 drivers/hid/Kconfig      |    6 +++++
 drivers/hid/Makefile     |    1 +
 drivers/hid/hid-elecom.c |   57
++++++++++++++++++++++++++++++++++++++++++++++
 drivers/hid/hid-ids.h    |    3 ++
 4 files changed, 67 insertions(+), 0 deletions(-)
 create mode 100644 drivers/hid/hid-elecom.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 132278f..0eac193 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -148,6 +148,12 @@ config HID_EGALAX
 	---help---
 	Support for the eGalax dual-touch panel.

+config HID_ELECOM
+	tristate "ELECOM"
+	depends on USB_HID
+	---help---
+	Support for the ELECOM BM084 (bluetooth mouse).
+
 config HID_EZKEY
 	tristate "Ezkey" if EMBEDDED
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 987fa06..2ec042f 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_HID_CHICONY)	+= hid-chicony.o
 obj-$(CONFIG_HID_CYPRESS)	+= hid-cypress.o
 obj-$(CONFIG_HID_DRAGONRISE)	+= hid-drff.o
 obj-$(CONFIG_HID_EGALAX)	+= hid-egalax.o
+obj-$(CONFIG_HID_ELECOM)	+= hid-elecom.o
 obj-$(CONFIG_HID_EZKEY)		+= hid-ezkey.o
 obj-$(CONFIG_HID_GYRATION)	+= hid-gyration.o
 obj-$(CONFIG_HID_KENSINGTON)	+= hid-kensington.o
diff --git a/drivers/hid/hid-elecom.c b/drivers/hid/hid-elecom.c
new file mode 100644
index 0000000..7a40878
--- /dev/null
+++ b/drivers/hid/hid-elecom.c
@@ -0,0 +1,57 @@
+/*
+ *  HID driver for Elecom BM084 (bluetooth mouse).
+ *  Removes a non-existing horizontal wheel from
+ *  the HID descriptor.
+ *  (This module is based on "hid-ortek".)
+ *
+ *  Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
the Free
+ * Software Foundation; either version 2 of the License, or (at your
option)
+ * any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+static void elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+		unsigned int rsize)
+{
+	if (rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
+		dev_info(&hdev->dev, "Fixing up Elecom BM084 "
+				"report descriptor.\n");
+		rdesc[47] = 0x00;
+	}
+}
+
+static const struct hid_device_id elecom_devices[] = {
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084)},
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, elecom_devices);
+
+static struct hid_driver elecom_driver = {
+	.name = "elecom",
+	.id_table = elecom_devices,
+	.report_fixup = elecom_report_fixup
+};
+
+static int __init elecom_init(void)
+{
+	return hid_register_driver(&elecom_driver);
+}
+
+static void __exit elecom_exit(void)
+{
+	hid_unregister_driver(&elecom_driver);
+}
+
+module_init(elecom_init);
+module_exit(elecom_exit);
+MODULE_LICENSE("GPL");
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 6af77ed..55cecb7 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -186,6 +186,9 @@
 #define USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER	0x0001
 #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH	0x480d

+#define USB_VENDOR_ID_ELECOM		0x056e
+#define USB_DEVICE_ID_ELECOM_BM084	0x0061
+
 #define USB_VENDOR_ID_ELO		0x04E7
 #define USB_DEVICE_ID_ELO_TS2700	0x0020

-- 
1.7.0.4