drivers/hid/hid-belkin.c

   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))
  30 static 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
  50 static 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                 dev_err(&hdev->dev, "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                 dev_err(&hdev->dev, "hw start failed\n");
  67                 goto err_free;
  68         }
  69
  70         return 0;
  71 err_free:
  72         return ret;
  73 }
  74
  75 static 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 };
  82 MODULE_DEVICE_TABLE(hid, belkin_devices);
  83
  84 static 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
  91 static int __init belkin_init(void)
  92 {
  93         return hid_register_driver(&belkin_driver);
  94 }
  95
  96 static void __exit belkin_exit(void)
  97 {
  98         hid_unregister_driver(&belkin_driver);
  99 }
 100
 101 module_init(belkin_init);
 102 module_exit(belkin_exit);
 103 MODULE_LICENSE("GPL");