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HID: Add quirk driver for NTI USB-SUN adapter

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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>
This commit is contained in:
Jonathan Tomer
2017-02-01 11:54:57 -08:00
committed by Jiri Kosina
parent 81bbef23db
commit 07e88a35dc
5 changed files with 70 additions and 0 deletions
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59
drivers/hid/hid-nti.c Normal file
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@@ -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");