1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for Kensington Slimblade Trackball 4 * 5 * Copyright (c) 2009 Jiri Kosina 6 */ 7 8 /* 9 */ 10 11 #include <linux/device.h> 12 #include <linux/input.h> 13 #include <linux/hid.h> 14 #include <linux/module.h> 15 16 #include "hid-ids.h" 17 18 #define ks_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c)) 19 20 static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi, 21 struct hid_field *field, struct hid_usage *usage, 22 unsigned long **bit, int *max) 23 { 24 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR) 25 return 0; 26 27 switch (usage->hid & HID_USAGE) { 28 case 0x01: ks_map_key(BTN_MIDDLE); break; 29 case 0x02: ks_map_key(BTN_SIDE); break; 30 default: 31 return 0; 32 } 33 return 1; 34 } 35 36 static const struct hid_device_id ks_devices[] = { 37 { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) }, 38 { } 39 }; 40 MODULE_DEVICE_TABLE(hid, ks_devices); 41 42 static struct hid_driver ks_driver = { 43 .name = "kensington", 44 .id_table = ks_devices, 45 .input_mapping = ks_input_mapping, 46 }; 47 module_hid_driver(ks_driver); 48 49 MODULE_DESCRIPTION("HID driver for Kensington Slimblade Trackball"); 50 MODULE_LICENSE("GPL"); 51