drivers/hid/hid-belkin.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  HID driver for some belkin "special" devices
0004  *
0005  *  Copyright (c) 1999 Andreas Gal
0006  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
0007  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
0008  *  Copyright (c) 2006-2007 Jiri Kosina
0009  *  Copyright (c) 2008 Jiri Slaby
0010  */
0011
0012 /*
0013  */
0014
0015 #include <linux/device.h>
0016 #include <linux/hid.h>
0017 #include <linux/module.h>
0018
0019 #include "hid-ids.h"
0020
0021 #define BELKIN_HIDDEV   0x01
0022 #define BELKIN_WKBD 0x02
0023
0024 #define belkin_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
0025                     EV_KEY, (c))
0026 static int belkin_input_mapping(struct hid_device *hdev, struct hid_input *hi,
0027         struct hid_field *field, struct hid_usage *usage,
0028         unsigned long **bit, int *max)
0029 {
0030     unsigned long quirks = (unsigned long)hid_get_drvdata(hdev);
0031
0032     if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER ||
0033             !(quirks & BELKIN_WKBD))
0034         return 0;
0035
0036     switch (usage->hid & HID_USAGE) {
0037     case 0x03a: belkin_map_key_clear(KEY_SOUND);        break;
0038     case 0x03b: belkin_map_key_clear(KEY_CAMERA);       break;
0039     case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS);    break;
0040     default:
0041         return 0;
0042     }
0043     return 1;
0044 }
0045
0046 static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id)
0047 {
0048     unsigned long quirks = id->driver_data;
0049     int ret;
0050
0051     hid_set_drvdata(hdev, (void *)quirks);
0052
0053     ret = hid_parse(hdev);
0054     if (ret) {
0055         hid_err(hdev, "parse failed\n");
0056         goto err_free;
0057     }
0058
0059     ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
0060         ((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0));
0061     if (ret) {
0062         hid_err(hdev, "hw start failed\n");
0063         goto err_free;
0064     }
0065
0066     return 0;
0067 err_free:
0068     return ret;
0069 }
0070
0071 static const struct hid_device_id belkin_devices[] = {
0072     { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM),
0073         .driver_data = BELKIN_HIDDEV },
0074     { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD),
0075         .driver_data = BELKIN_WKBD },
0076     { }
0077 };
0078 MODULE_DEVICE_TABLE(hid, belkin_devices);
0079
0080 static struct hid_driver belkin_driver = {
0081     .name = "belkin",
0082     .id_table = belkin_devices,
0083     .input_mapping = belkin_input_mapping,
0084     .probe = belkin_probe,
0085 };
0086 module_hid_driver(belkin_driver);
0087
0088 MODULE_LICENSE("GPL");