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) 2008 Jiri Slaby
   9 */
  10
  11/*
  12 * This program is free software; you can redistribute it and/or modify it
  13 * under the terms of the GNU General Public License as published by the Free
  14 * Software Foundation; either version 2 of the License, or (at your option)
  15 * any later version.
  16 */
  17
  18#include <linux/device.h>
  19#include <linux/hid.h>
  20#include <linux/module.h>
  21
  22#include "hid-ids.h"
  23
  24#define BELKIN_HIDDEV   0x01
  25#define BELKIN_WKBD     0x02
  26
  27#define belkin_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
  28                                        EV_KEY, (c))
  29static int belkin_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  30                struct hid_field *field, struct hid_usage *usage,
  31                unsigned long **bit, int *max)
  32{
  33        unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
  34
  35        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
  36                        !(quirks & BELKIN_WKBD))
  37                return 0;
  38
  39        switch (usage->hid & HID_USAGE) {
  40        case 0x03a: belkin_map_key_clear(KEY_SOUND);            break;
  41        case 0x03b: belkin_map_key_clear(KEY_CAMERA);           break;
  42        case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS);        break;
  43        default:
  44                return 0;
  45        }
  46        return 1;
  47}
  48
  49static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
  50{
  51        unsigned long quirks = id->driver_data;
  52        int ret;
  53
  54        hid_set_drvdata(hdev, (void *)quirks);
  55
  56        ret = hid_parse(hdev);
  57        if (ret) {
  58                hid_err(hdev, "parse failed\n");
  59                goto err_free;
  60        }
  61
  62        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
  63                ((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
  64        if (ret) {
  65                hid_err(hdev, "hw start failed\n");
  66                goto err_free;
  67        }
  68
  69        return 0;
  70err_free:
  71        return ret;
  72}
  73
  74static const struct hid_device_id belkin_devices[] = {
  75        { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM),
  76                .driver_data = BELKIN_HIDDEV },
  77        { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD),
  78                .driver_data = BELKIN_WKBD },
  79        { }
  80};
  81MODULE_DEVICE_TABLE(hid, belkin_devices);
  82
  83static struct hid_driver belkin_driver = {
  84        .name = "belkin",
  85        .id_table = belkin_devices,
  86        .input_mapping = belkin_input_mapping,
  87        .probe = belkin_probe,
  88};
  89module_hid_driver(belkin_driver);
  90
  91MODULE_LICENSE("GPL");
  92
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