[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hid / hid-ortek.c

/*
 *  HID driver for various devices which are apparently based on the same chipset
 *  from certain vendor which produces chips that contain wrong LogicalMaximum
 *  value in their HID report descriptor. Currently supported devices are:
 *
 *    Ortek PKB-1700
 *    Ortek WKB-2000
 *    Skycable wireless presenter
 *
 *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
 *  Copyright (c) 2011 Jiri Kosina
 */

/*
 * 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 __u8 *ortek_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
		hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)\n");
		rdesc[55] = 0x92;
	} else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
		hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)\n");
		rdesc[53] = 0x65;
	}
	return rdesc;
}

static const struct hid_device_id ortek_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
	{ }
};
MODULE_DEVICE_TABLE(hid, ortek_devices);

static struct hid_driver ortek_driver = {
	.name = "ortek",
	.id_table = ortek_devices,
	.report_fixup = ortek_report_fixup
};
module_hid_driver(ortek_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
cd9ec30d	1	/*
d586dca0 JK	2	* HID driver for various devices which are apparently based on the same chipset
	3	* from certain vendor which produces chips that contain wrong LogicalMaximum
	4	* value in their HID report descriptor. Currently supported devices are:
	5	*
	6	* Ortek PKB-1700
	7	* Ortek WKB-2000
	8	* Skycable wireless presenter
cd9ec30d JH	9	*
cd9ec30d JH	10	* Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
d586dca0	11	* Copyright (c) 2011 Jiri Kosina
cd9ec30d JH	12	*/
	13
	14	/*
	15	* This program is free software; you can redistribute it and/or modify it
	16	* under the terms of the GNU General Public License as published by the Free
	17	* Software Foundation; either version 2 of the License, or (at your option)
	18	* any later version.
	19	*/
	20
	21	#include <linux/device.h>
	22	#include <linux/hid.h>
	23	#include <linux/module.h>
	24
	25	#include "hid-ids.h"
	26
73e4008d NK	27	static __u8 ortek_report_fixup(struct hid_device hdev, __u8 *rdesc,
73e4008d NK	28	unsigned int *rsize)
cd9ec30d	29	{
73e4008d	30	if (*rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x01) {
d586dca0	31	hid_info(hdev, "Fixing up logical minimum in report descriptor (Ortek)\n");
cd9ec30d	32	rdesc[55] = 0x92;
d586dca0 JK	33	} else if (*rsize >= 54 && rdesc[52] == 0x25 && rdesc[53] == 0x01) {
	34	hid_info(hdev, "Fixing up logical minimum in report descriptor (Skycable)\n");
	35	rdesc[53] = 0x65;
cd9ec30d	36	}
73e4008d	37	return rdesc;
cd9ec30d JH	38	}
	39
	40	static const struct hid_device_id ortek_devices[] = {
270fdc07	41	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
cd9ec30d	42	{ HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
d586dca0	43	{ HID_USB_DEVICE(USB_VENDOR_ID_SKYCABLE, USB_DEVICE_ID_SKYCABLE_WIRELESS_PRESENTER) },
cd9ec30d JH	44	{ }
	45	};
	46	MODULE_DEVICE_TABLE(hid, ortek_devices);
	47
	48	static struct hid_driver ortek_driver = {
	49	.name = "ortek",
	50	.id_table = ortek_devices,
	51	.report_fixup = ortek_report_fixup
	52	};
f425458e	53	module_hid_driver(ortek_driver);
cd9ec30d	54
cd9ec30d	55	MODULE_LICENSE("GPL");