tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HID driver for some ITE "special" devices
4 * Copyright (c) 2017 Hans de Goede <hdegoede@redhat.com>
5 */
6
7#include <linux/device.h>
8#include <linux/input.h>
9#include <linux/hid.h>
10#include <linux/module.h>
11
12#include "hid-ids.h"
13
14static int ite_event(struct hid_device *hdev, struct hid_field *field,
15 struct hid_usage *usage, __s32 value)
16{
17 struct input_dev *input;
18
19 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
20 return 0;
21
22 input = field->hidinput->input;
23
24 /*
25 * The ITE8595 always reports 0 as value for the rfkill button. Luckily
26 * it is the only button in its report, and it sends a report on
27 * release only, so receiving a report means the button was pressed.
28 */
29 if (usage->hid == HID_GD_RFKILL_BTN) {
30 input_event(input, EV_KEY, KEY_RFKILL, 1);
31 input_sync(input);
32 input_event(input, EV_KEY, KEY_RFKILL, 0);
33 input_sync(input);
34 return 1;
35 }
36
37 return 0;
38}
39
40static const struct hid_device_id ite_devices[] = {
41 { HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) },
42 { HID_USB_DEVICE(USB_VENDOR_ID_258A, USB_DEVICE_ID_258A_6A88) },
43 { }
44};
45MODULE_DEVICE_TABLE(hid, ite_devices);
46
47static struct hid_driver ite_driver = {
48 .name = "itetech",
49 .id_table = ite_devices,
50 .event = ite_event,
51};
52module_hid_driver(ite_driver);
53
54MODULE_LICENSE("GPL");