linux/drivers/hid/hid-belkin.c
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   1/*
   2 *  HID driver for some belkin "special" devices
   3 *
   4 *  Copyright (c) 1999 Andreas Gal
   5 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   6 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   7 *  Copyright (c) 2006-2007 Jiri Kosina
   8 *  Copyright (c) 2007 Paul Walmsley
   9 *  Copyright (c) 2008 Jiri Slaby
  10 */
  11
  12/*
  13 * This program is free software; you can redistribute it and/or modify it
  14 * under the terms of the GNU General Public License as published by the Free
  15 * Software Foundation; either version 2 of the License, or (at your option)
  16 * any later version.
  17 */
  18
  19#include <linux/device.h>
  20#include <linux/hid.h>
  21#include <linux/module.h>
  22
  23#include "hid-ids.h"
  24
  25#define BELKIN_HIDDEV   0x01
  26#define BELKIN_WKBD     0x02
  27
  28#define belkin_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
  29                                        EV_KEY, (c))
  30static int belkin_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  31                struct hid_field *field, struct hid_usage *usage,
  32                unsigned long **bit, int *max)
  33{
  34        unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
  35
  36        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
  37                        !(quirks & BELKIN_WKBD))
  38                return 0;
  39
  40        switch (usage->hid & HID_USAGE) {
  41        case 0x03a: belkin_map_key_clear(KEY_SOUND);            break;
  42        case 0x03b: belkin_map_key_clear(KEY_CAMERA);           break;
  43        case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS);        break;
  44        default:
  45                return 0;
  46        }
  47        return 1;
  48}
  49
  50static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
  51{
  52        unsigned long quirks = id->driver_data;
  53        int ret;
  54
  55        hid_set_drvdata(hdev, (void *)quirks);
  56
  57        ret = hid_parse(hdev);
  58        if (ret) {
  59                hid_err(hdev, "parse failed\n");
  60                goto err_free;
  61        }
  62
  63        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
  64                ((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
  65        if (ret) {
  66                hid_err(hdev, "hw start failed\n");
  67                goto err_free;
  68        }
  69
  70        return 0;
  71err_free:
  72        return ret;
  73}
  74
  75static const struct hid_device_id belkin_devices[] = {
  76        { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM),
  77                .driver_data = BELKIN_HIDDEV },
  78        { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD),
  79                .driver_data = BELKIN_WKBD },
  80        { }
  81};
  82MODULE_DEVICE_TABLE(hid, belkin_devices);
  83
  84static struct hid_driver belkin_driver = {
  85        .name = "belkin",
  86        .id_table = belkin_devices,
  87        .input_mapping = belkin_input_mapping,
  88        .probe = belkin_probe,
  89};
  90
  91static int __init belkin_init(void)
  92{
  93        return hid_register_driver(&belkin_driver);
  94}
  95
  96static void __exit belkin_exit(void)
  97{
  98        hid_unregister_driver(&belkin_driver);
  99}
 100
 101module_init(belkin_init);
 102module_exit(belkin_exit);
 103MODULE_LICENSE("GPL");
 104
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