HID: Add quirk driver for NTI USB-SUN adapter
These adapters allow pre-USB Sun keyboards to be connected to USB-only
machines, but include the wrong maximum keycode in their report descriptor,
making most of the keys present on Sun keyboards but not 101-key PC
keyboards nonfunctional.
This patch implements a quirk that overrides the maximum keycode in the
report descriptor.
Signed-off-by: Jonathan Tomer <jktomer@google.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-nti.c b/drivers/hid/hid-nti.c
new file mode 100644
index 0000000..5bb827b
--- /dev/null
+++ b/drivers/hid/hid-nti.c
@@ -0,0 +1,59 @@
+/*
+ * USB HID quirks support for Network Technologies, Inc. "USB-SUN" USB
+ * adapter for pre-USB Sun keyboards
+ *
+ * Copyright (c) 2011 Google, Inc.
+ *
+ * Based on HID apple driver by
+ * Copyright (c) 1999 Andreas Gal
+ * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ * Copyright (c) 2006-2007 Jiri Kosina
+ * Copyright (c) 2008 Jiri Slaby <jirislaby@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/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+MODULE_AUTHOR("Jonathan Klabunde Tomer <jktomer@google.com>");
+MODULE_DESCRIPTION("HID driver for Network Technologies USB-SUN keyboard adapter");
+
+/*
+ * NTI Sun keyboard adapter has wrong logical maximum in report descriptor
+ */
+static __u8 *nti_usbsun_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ if (*rsize >= 60 && rdesc[53] == 0x65 && rdesc[59] == 0x65) {
+ hid_info(hdev, "fixing up NTI USB-SUN keyboard adapter report descriptor\n");
+ rdesc[53] = rdesc[59] = 0xe7;
+ }
+ return rdesc;
+}
+
+static const struct hid_device_id nti_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_NTI, USB_DEVICE_ID_USB_SUN) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, nti_devices);
+
+static struct hid_driver nti_driver = {
+ .name = "nti",
+ .id_table = nti_devices,
+ .report_fixup = nti_usbsun_report_fixup
+};
+
+module_hid_driver(nti_driver);
+
+MODULE_LICENSE("GPL");