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Linux/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 module_hid_driver(belkin_driver);
 90 
 91 MODULE_LICENSE("GPL");
 92 

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