Merge tag 'for-6.5-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[platform/kernel/linux-rpi.git] / drivers / hid / hid-evision.c
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
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_LICENSE("GPL");