HID: add support for Ortek WKB-2000

This patch adds a new USB HID driver for the Ortek WKB-2000, working around an
incorrect LogicalMaximum value in the USB resource descriptor.

Tracked by http://bugzilla.kernel.org/show_bug.cgi?id=14787
Bug originally reported by Ubuntu users: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/405390

Signed-off-by: Johnathon Harris <jmharris@gmail.com>
Tested-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/hid/hid-ortek.c b/drivers/hid/hid-ortek.c
new file mode 100644
index 0000000..aa9a960
--- /dev/null
+++ b/drivers/hid/hid-ortek.c
@@ -0,0 +1,56 @@
+/*
+ *  HID driver for Ortek WKB-2000 (wireless keyboard + mouse trackpad).
+ *  Fixes LogicalMaximum error in USB report description, see
+ *  http://bugzilla.kernel.org/show_bug.cgi?id=14787
+ *
+ *  Copyright (c) 2010 Johnathon Harris <jmharris@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 ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+		unsigned int rsize)
+{
+	if (rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
+		dev_info(&hdev->dev, "Fixing up Ortek WKB-2000 "
+				"report descriptor.\n");
+		rdesc[55] = 0x92;
+	}
+}
+
+static const struct hid_device_id ortek_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, ortek_devices);
+
+static struct hid_driver ortek_driver = {
+	.name = "ortek",
+	.id_table = ortek_devices,
+	.report_fixup = ortek_report_fixup
+};
+
+static int __init ortek_init(void)
+{
+	return hid_register_driver(&ortek_driver);
+}
+
+static void __exit ortek_exit(void)
+{
+	hid_unregister_driver(&ortek_driver);
+}
+
+module_init(ortek_init);
+module_exit(ortek_exit);
+MODULE_LICENSE("GPL");