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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/hid/hid-ortek.c
15111 views
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/*

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 *  HID driver for various devices which are apparently based on the same chipset

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 *  from certain vendor which produces chips that contain wrong LogicalMaximum

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 *  value in their HID report descriptor. Currently supported devices are:

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 *

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 *    Ortek PKB-1700

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 *    Ortek WKB-2000

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 *    Skycable wireless presenter

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 *

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 *  Copyright (c) 2010 Johnathon Harris <[email protected]>

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 *  Copyright (c) 2011 Jiri Kosina

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 */

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/*

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 * This program is free software; you can redistribute it and/or modify it

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 * under the terms of the GNU General Public License as published by the Free

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 * Software Foundation; either version 2 of the License, or (at your option)

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 * any later version.

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 */

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#include <linux/device.h>

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#include <linux/hid.h>

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#include <linux/module.h>

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#include "hid-ids.h"

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static __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,

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		unsigned int *rsize)

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{

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	if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {

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		hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)\n");

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		rdesc[55] = 0x92;

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	} else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {

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		hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)\n");

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		rdesc[53] = 0x65;

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	}

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	return rdesc;

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}

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static const struct hid_device_id ortek_devices[] = {

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	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },

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	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },

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	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },

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	{ }

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};

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MODULE_DEVICE_TABLE(hid, ortek_devices);

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static struct hid_driver ortek_driver = {

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	.name = "ortek",

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	.id_table = ortek_devices,

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	.report_fixup = ortek_report_fixup

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};

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static int __init ortek_init(void)

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{

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	return hid_register_driver(&ortek_driver);

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}

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static void __exit ortek_exit(void)

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{

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	hid_unregister_driver(&ortek_driver);

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}

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module_init(ortek_init);

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module_exit(ortek_exit);

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MODULE_LICENSE("GPL");

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