linux-imx

/*

 *  HID driver for Kensigton Slimblade Trackball

 *

 *  Copyright (c) 2009 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/input.h>

#include <linux/hid.h>

#include <linux/module.h>

​

#include "hid-ids.h"

​

#define ks_map_key(c)   hid_map_usage(hi, usage, bit, max, EV_KEY, (c))

​

static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi,

        struct hid_field *field, struct hid_usage *usage,

        unsigned long **bit, int *max)

{

    if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)

        return 0;

​

    switch (usage->hid & HID_USAGE) {

    case 0x01: ks_map_key(BTN_MIDDLE);  break;

    case 0x02: ks_map_key(BTN_SIDE);    break;

    default:

        return 0;

    }

    return 1;

}

​

static const struct hid_device_id ks_devices[] = {

    { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },

    { }

};

MODULE_DEVICE_TABLE(hid, ks_devices);

​

static struct hid_driver ks_driver = {

    .name = "kensington",

    .id_table = ks_devices,

    .input_mapping = ks_input_mapping,

};

module_hid_driver(ks_driver);

​

MODULE_LICENSE("GPL");