drivers/hid/hid-kensington.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  HID driver for Kensigton Slimblade Trackball
0004  *
0005  *  Copyright (c) 2009 Jiri Kosina
0006  */
0007
0008 /*
0009  */
0010
0011 #include <linux/device.h>
0012 #include <linux/input.h>
0013 #include <linux/hid.h>
0014 #include <linux/module.h>
0015
0016 #include "hid-ids.h"
0017
0018 #define ks_map_key(c)   hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
0019
0020 static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi,
0021         struct hid_field *field, struct hid_usage *usage,
0022         unsigned long **bit, int *max)
0023 {
0024     if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
0025         return 0;
0026
0027     switch (usage->hid & HID_USAGE) {
0028     case 0x01: ks_map_key(BTN_MIDDLE);  break;
0029     case 0x02: ks_map_key(BTN_SIDE);    break;
0030     default:
0031         return 0;
0032     }
0033     return 1;
0034 }
0035
0036 static const struct hid_device_id ks_devices[] = {
0037     { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
0038     { }
0039 };
0040 MODULE_DEVICE_TABLE(hid, ks_devices);
0041
0042 static struct hid_driver ks_driver = {
0043     .name = "kensington",
0044     .id_table = ks_devices,
0045     .input_mapping = ks_input_mapping,
0046 };
0047 module_hid_driver(ks_driver);
0048
0049 MODULE_LICENSE("GPL");