LXR linux/drivers/hid/hid-belkin.c

   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))
  26static 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        unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
  31
  32        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
  33                        !(quirks & BELKIN_WKBD))
  34                return 0;
  35
  36        switch (usage->hid & HID_USAGE) {
  37        case 0x03a: belkin_map_key_clear(KEY_SOUND);            break;
  38        case 0x03b: belkin_map_key_clear(KEY_CAMERA);           break;
  39        case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS);        break;
  40        default:
  41                return 0;
  42        }
  43        return 1;
  44}
  45
  46static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
  47{
  48        unsigned long quirks = id->driver_data;
  49        int ret;
  50
  51        hid_set_drvdata(hdev, (void *)quirks);
  52
  53        ret = hid_parse(hdev);
  54        if (ret) {
  55                hid_err(hdev, "parse failed\n");
  56                goto err_free;
  57        }
  58
  59        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
  60                ((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
  61        if (ret) {
  62                hid_err(hdev, "hw start failed\n");
  63                goto err_free;
  64        }
  65
  66        return 0;
  67err_free:
  68        return ret;
  69}
  70
  71static 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};
  78MODULE_DEVICE_TABLE(hid, belkin_devices);
  79
  80static struct hid_driver belkin_driver = {
  81        .name = "belkin",
  82        .id_table = belkin_devices,
  83        .input_mapping = belkin_input_mapping,
  84        .probe = belkin_probe,
  85};
  86module_hid_driver(belkin_driver);
  87
  88MODULE_LICENSE("GPL");
  89