1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * HID driver for EVision devices
4 * For now, only ignore bogus consumer reports
5 * sent after the keyboard has been configured
6 *
7 * Copyright (c) 2022 Philippe Valembois
8 */
9
10 #include <linux/device.h>
11 #include <linux/input.h>
12 #include <linux/hid.h>
13 #include <linux/module.h>
14
15 #include "hid-ids.h"
16
evision_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)17 static int evision_input_mapping(struct hid_device *hdev, struct hid_input *hi,
18 struct hid_field *field, struct hid_usage *usage,
19 unsigned long **bit, int *max)
20 {
21 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
22 return 0;
23
24 /* Ignore key down event */
25 if ((usage->hid & HID_USAGE) >> 8 == 0x05)
26 return -1;
27 /* Ignore key up event */
28 if ((usage->hid & HID_USAGE) >> 8 == 0x06)
29 return -1;
30
31 switch (usage->hid & HID_USAGE) {
32 /* Ignore configuration saved event */
33 case 0x0401: return -1;
34 /* Ignore reset event */
35 case 0x0402: return -1;
36 }
37 return 0;
38 }
39
40 static const struct hid_device_id evision_devices[] = {
41 { HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EVISION_ICL01) },
42 { }
43 };
44 MODULE_DEVICE_TABLE(hid, evision_devices);
45
46 static struct hid_driver evision_driver = {
47 .name = "evision",
48 .id_table = evision_devices,
49 .input_mapping = evision_input_mapping,
50 };
51 module_hid_driver(evision_driver);
52
53 MODULE_DESCRIPTION("HID driver for EVision devices");
54 MODULE_LICENSE("GPL");
55