1/* 2 * HID driver for some ezkey "special" devices 3 * 4 * Copyright (c) 1999 Andreas Gal 5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 7 * Copyright (c) 2006-2007 Jiri Kosina 8 * Copyright (c) 2007 Paul Walmsley 9 * Copyright (c) 2008 Jiri Slaby 10 */ 11 12/* 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the Free 15 * Software Foundation; either version 2 of the License, or (at your option) 16 * any later version. 17 */ 18 19#include <linux/device.h> 20#include <linux/input.h> 21#include <linux/hid.h> 22#include <linux/module.h> 23 24#include "hid-ids.h" 25 26#define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c)) 27#define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c)) 28 29static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi, 30 struct hid_field *field, struct hid_usage *usage, 31 unsigned long **bit, int *max) 32{ 33 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) 34 return 0; 35 36 switch (usage->hid & HID_USAGE) { 37 case 0x230: ez_map_key(BTN_MOUSE); break; 38 case 0x231: ez_map_rel(REL_WHEEL); break; 39 /* 40 * this keyboard has a scrollwheel implemented in 41 * totally broken way. We map this usage temporarily 42 * to HWHEEL and handle it in the event quirk handler 43 */ 44 case 0x232: ez_map_rel(REL_HWHEEL); break; 45 default: 46 return 0; 47 } 48 return 1; 49} 50 51static int ez_event(struct hid_device *hdev, struct hid_field *field, 52 struct hid_usage *usage, __s32 value) 53{ 54 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || 55 !usage->type) 56 return 0; 57 58 /* handle the temporary quirky mapping to HWHEEL */ 59 if (usage->type == EV_REL && usage->code == REL_HWHEEL) { 60 struct input_dev *input = field->hidinput->input; 61 input_event(input, usage->type, REL_WHEEL, -value); 62 return 1; 63 } 64 65 return 0; 66} 67 68static const struct hid_device_id ez_devices[] = { 69 { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) }, 70 { } 71}; 72MODULE_DEVICE_TABLE(hid, ez_devices); 73 74static struct hid_driver ez_driver = { 75 .name = "ezkey", 76 .id_table = ez_devices, 77 .input_mapping = ez_input_mapping, 78 .event = ez_event, 79}; 80 81static int __init ez_init(void) 82{ 83 return hid_register_driver(&ez_driver); 84} 85 86static void __exit ez_exit(void) 87{ 88 hid_unregister_driver(&ez_driver); 89} 90 91module_init(ez_init); 92module_exit(ez_exit); 93MODULE_LICENSE("GPL"); 94