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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * HID driver for some ezkey "special" devices4 *5 * Copyright (c) 1999 Andreas Gal6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc8 * Copyright (c) 2006-2007 Jiri Kosina9 * Copyright (c) 2008 Jiri Slaby10 */11 12/*13 */14 15#include <linux/device.h>16#include <linux/input.h>17#include <linux/hid.h>18#include <linux/module.h>19 20#include "hid-ids.h"21 22#define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c))23#define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c))24 25static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi,26 struct hid_field *field, struct hid_usage *usage,27 unsigned long **bit, int *max)28{29 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)30 return 0;31 32 switch (usage->hid & HID_USAGE) {33 case 0x230: ez_map_key(BTN_MOUSE); break;34 case 0x231: ez_map_rel(REL_WHEEL); break;35 /*36 * this keyboard has a scrollwheel implemented in37 * totally broken way. We map this usage temporarily38 * to HWHEEL and handle it in the event quirk handler39 */40 case 0x232: ez_map_rel(REL_HWHEEL); break;41 default:42 return 0;43 }44 return 1;45}46 47static int ez_event(struct hid_device *hdev, struct hid_field *field,48 struct hid_usage *usage, __s32 value)49{50 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||51 !usage->type)52 return 0;53 54 /* handle the temporary quirky mapping to HWHEEL */55 if (usage->type == EV_REL && usage->code == REL_HWHEEL) {56 struct input_dev *input = field->hidinput->input;57 input_event(input, usage->type, REL_WHEEL, -value);58 return 1;59 }60 61 return 0;62}63 64static const struct hid_device_id ez_devices[] = {65 { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },66 { }67};68MODULE_DEVICE_TABLE(hid, ez_devices);69 70static struct hid_driver ez_driver = {71 .name = "ezkey",72 .id_table = ez_devices,73 .input_mapping = ez_input_mapping,74 .event = ez_event,75};76module_hid_driver(ez_driver);77 78MODULE_DESCRIPTION("HID driver for some ezkey \"special\" devices");79MODULE_LICENSE("GPL");80