drivers/hid/hid-nti.c

Source file repositories/reference/linux-study-clean/drivers/hid/hid-nti.c

File Facts

System
Linux kernel
Corpus path
drivers/hid/hid-nti.c
Extension
.c
Size
1517 bytes
Lines
57
Domain
Driver Families
Bucket
drivers/hid
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  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>
 */

/*
 */

#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 const __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");

Annotation

Implementation Notes