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)) 26 static 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 const struct hid_device_id *id = hid_get_drvdata(hdev); 31 unsigned long quirks = id->driver_data; 32 33 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER || 34 !(quirks & BELKIN_WKBD)) 35 return 0; 36 37 switch (usage->hid & HID_USAGE) { 38 case 0x03a: belkin_map_key_clear(KEY_SOUND); break; 39 case 0x03b: belkin_map_key_clear(KEY_CAMERA); break; 40 case 0x03c: belkin_map_key_clear(KEY_DOCUMENTS); break; 41 default: 42 return 0; 43 } 44 return 1; 45 } 46 47 static int belkin_probe(struct hid_device *hdev, const struct hid_device_id *id) 48 { 49 unsigned long quirks = id->driver_data; 50 int ret; 51 52 hid_set_drvdata(hdev, (void *)id); 53 54 ret = hid_parse(hdev); 55 if (ret) { 56 hid_err(hdev, "parse failed\n"); 57 goto err_free; 58 } 59 60 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT | 61 ((quirks & BELKIN_HIDDEV) ? HID_CONNECT_HIDDEV_FORCE : 0)); 62 if (ret) { 63 hid_err(hdev, "hw start failed\n"); 64 goto err_free; 65 } 66 67 return 0; 68 err_free: 69 return ret; 70 } 71 72 static const struct hid_device_id belkin_devices[] = { 73 { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM), 74 .driver_data = BELKIN_HIDDEV }, 75 { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD), 76 .driver_data = BELKIN_WKBD }, 77 { } 78 }; 79 MODULE_DEVICE_TABLE(hid, belkin_devices); 80 81 static struct hid_driver belkin_driver = { 82 .name = "belkin", 83 .id_table = belkin_devices, 84 .input_mapping = belkin_input_mapping, 85 .probe = belkin_probe, 86 }; 87 module_hid_driver(belkin_driver); 88 89 MODULE_DESCRIPTION("HID driver for some belkin \"special\" devices"); 90 MODULE_LICENSE("GPL"); 91