Line data    Source code

       1             : // SPDX-License-Identifier: GPL-2.0-or-later
       2             : /*
       3             :  *  HID driver for some belkin "special" devices
       4             :  *
       5             :  *  Copyright (c) 1999 Andreas Gal
       6             :  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
       7             :  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
       8             :  *  Copyright (c) 2006-2007 Jiri Kosina
       9             :  *  Copyright (c) 2008 Jiri Slaby
      10             :  */
      11             : 
      12             : /*
      13             :  */
      14             : 
      15             : #include <linux/device.h>
      16             : #include <linux/hid.h>
      17             : #include <linux/module.h>
      18             : 
      19             : #include "hid-ids.h"
      20             : 
      21             : #define BELKIN_HIDDEV   0x01
      22             : #define BELKIN_WKBD     0x02
      23             : 
      24             : #define belkin_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
      25             :                                         EV_KEY, (c))
      26           0 : static int belkin_input_mapping(struct hid_device *hdev, struct hid_input *hi,
      27             :                 struct hid_field *field, struct hid_usage *usage,
      28             :                 unsigned long **bit, int *max)
      29             : {
      30           0 :         unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
      31             : 
      32           0 :         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
      33           0 :                         !(quirks & BELKIN_WKBD))
      34             :                 return 0;
      35             : 
      36           0 :         switch (usage->hid & HID_USAGE) {
      37           0 :         case 0x03a: belkin_map_key_clear(KEY_SOUND);            break;
      38           0 :         case 0x03b: belkin_map_key_clear(KEY_CAMERA);           break;
      39           0 :         case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS);        break;
      40             :         default:
      41             :                 return 0;
      42             :         }
      43             :         return 1;
      44             : }
      45             : 
      46           0 : static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
      47             : {
      48           0 :         unsigned long quirks = id->driver_data;
      49             :         int ret;
      50             : 
      51           0 :         hid_set_drvdata(hdev, (void *)quirks);
      52             : 
      53           0 :         ret = hid_parse(hdev);
      54           0 :         if (ret) {
      55           0 :                 hid_err(hdev, "parse failed\n");
      56           0 :                 goto err_free;
      57             :         }
      58             : 
      59           0 :         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
      60           0 :                 ((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
      61           0 :         if (ret) {
      62           0 :                 hid_err(hdev, "hw start failed\n");
      63           0 :                 goto err_free;
      64             :         }
      65             : 
      66             :         return 0;
      67             : err_free:
      68             :         return ret;
      69             : }
      70             : 
      71             : static const struct hid_device_id belkin_devices[] = {
      72             :         { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM),
      73             :                 .driver_data = BELKIN_HIDDEV },
      74             :         { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD),
      75             :                 .driver_data = BELKIN_WKBD },
      76             :         { }
      77             : };
      78             : MODULE_DEVICE_TABLE(hid, belkin_devices);
      79             : 
      80             : static struct hid_driver belkin_driver = {
      81             :         .name = "belkin",
      82             :         .id_table = belkin_devices,
      83             :         .input_mapping = belkin_input_mapping,
      84             :         .probe = belkin_probe,
      85             : };
      86           1 : module_hid_driver(belkin_driver);
      87             : 
      88             : MODULE_LICENSE("GPL");