| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * HID driver for some ezkey "special" devices |
| * |
| * Copyright (c) 1999 Andreas Gal |
| * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
| * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
| * Copyright (c) 2006-2007 Jiri Kosina |
| * Copyright (c) 2008 Jiri Slaby |
| */ |
| |
| /* |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/input.h> |
| #include <linux/hid.h> |
| #include <linux/module.h> |
| |
| #include "hid-ids.h" |
| |
| #define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c)) |
| #define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c)) |
| |
| static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
| struct hid_field *field, struct hid_usage *usage, |
| unsigned long **bit, int *max) |
| { |
| if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER) |
| return 0; |
| |
| switch (usage->hid & HID_USAGE) { |
| case 0x230: ez_map_key(BTN_MOUSE); break; |
| case 0x231: ez_map_rel(REL_WHEEL); break; |
| /* |
| * this keyboard has a scrollwheel implemented in |
| * totally broken way. We map this usage temporarily |
| * to HWHEEL and handle it in the event quirk handler |
| */ |
| case 0x232: ez_map_rel(REL_HWHEEL); break; |
| default: |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int ez_event(struct hid_device *hdev, struct hid_field *field, |
| struct hid_usage *usage, __s32 value) |
| { |
| if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
| !usage->type) |
| return 0; |
| |
| /* handle the temporary quirky mapping to HWHEEL */ |
| if (usage->type == EV_REL && usage->code == REL_HWHEEL) { |
| struct input_dev *input = field->hidinput->input; |
| input_event(input, usage->type, REL_WHEEL, -value); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static const struct hid_device_id ez_devices[] = { |
| { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(hid, ez_devices); |
| |
| static struct hid_driver ez_driver = { |
| .name = "ezkey", |
| .id_table = ez_devices, |
| .input_mapping = ez_input_mapping, |
| .event = ez_event, |
| }; |
| module_hid_driver(ez_driver); |
| |
| MODULE_LICENSE("GPL"); |