kernel_optimize_test/drivers/hid/hid-kye.c

/*
 *  HID driver for Kye/Genius devices not fully compliant with HID standard
 *
 *  Copyright (c) 2009 Jiri Kosina
 *  Copyright (c) 2009 Tomas Hanak
 */

/*
 * 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"

/* the fixups that need to be done:
 *   - change led usage page to button for extra buttons
 *   - report size 8 count 1 must be size 1 count 8 for button bitfield
 *   - change the button usage range to 4-7 for the extra buttons
 */
static __u8 *kye_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	if (*rsize >= 74 &&
		rdesc[61] == 0x05 && rdesc[62] == 0x08 &&
		rdesc[63] == 0x19 && rdesc[64] == 0x08 &&
		rdesc[65] == 0x29 && rdesc[66] == 0x0f &&
		rdesc[71] == 0x75 && rdesc[72] == 0x08 &&
		rdesc[73] == 0x95 && rdesc[74] == 0x01) {
		hid_info(hdev,
			 "fixing up Kye/Genius Ergo Mouse report descriptor\n");
		rdesc[62] = 0x09;
		rdesc[64] = 0x04;
		rdesc[66] = 0x07;
		rdesc[72] = 0x01;
		rdesc[74] = 0x08;
	}
	return rdesc;
}

static const struct hid_device_id kye_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
	{ }
};
MODULE_DEVICE_TABLE(hid, kye_devices);

static struct hid_driver kye_driver = {
	.name = "kye",
	.id_table = kye_devices,
	.report_fixup = kye_report_fixup,
};

static int __init kye_init(void)
{
	return hid_register_driver(&kye_driver);
}

static void __exit kye_exit(void)
{
	hid_unregister_driver(&kye_driver);
}

module_init(kye_init);
module_exit(kye_exit);
MODULE_LICENSE("GPL");