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) 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))
  29 static 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
  49 static 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;
  70 err_free:
  71         return ret;
  72 }
  73
  74 static 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 };
  81 MODULE_DEVICE_TABLE(hid, belkin_devices);
  82
  83 static struct hid_driver belkin_driver = {
  84         .name = "belkin",
  85         .id_table = belkin_devices,
  86         .input_mapping = belkin_input_mapping,
  87         .probe = belkin_probe,
  88 };
  89
  90 static int __init belkin_init(void)
  91 {
  92         return hid_register_driver(&belkin_driver);
  93 }
  94
  95 static void __exit belkin_exit(void)
  96 {
  97         hid_unregister_driver(&belkin_driver);
  98 }
  99
 100 module_init(belkin_init);
 101 module_exit(belkin_exit);
 102 MODULE_LICENSE("GPL");