2 * HID driver for ELECOM devices.
3 * Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
4 * Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
5 * Copyright (c) 2017 Diego Elio Pettenò <flameeyes@flameeyes.eu>
6 * Copyright (c) 2017 Alex Manoussakis <amanou@gnu.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
16 #include <linux/device.h>
17 #include <linux/hid.h>
18 #include <linux/module.h>
22 static __u8
*elecom_report_fixup(struct hid_device
*hdev
, __u8
*rdesc
,
25 switch (hdev
->product
) {
26 case USB_DEVICE_ID_ELECOM_BM084
:
27 /* The BM084 Bluetooth mouse includes a non-existing horizontal
28 * wheel in the HID descriptor. */
29 if (*rsize
>= 48 && rdesc
[46] == 0x05 && rdesc
[47] == 0x0c) {
30 hid_info(hdev
, "Fixing up Elecom BM084 report descriptor\n");
34 case USB_DEVICE_ID_ELECOM_DEFT_WIRED
:
35 case USB_DEVICE_ID_ELECOM_DEFT_WIRELESS
:
36 case USB_DEVICE_ID_ELECOM_HUGE_WIRED
:
37 case USB_DEVICE_ID_ELECOM_HUGE_WIRELESS
:
38 /* The DEFT/HUGE trackball has eight buttons, but its descriptor
39 * only reports five, disabling the three Fn buttons on the top
42 * Apply the following diff to the descriptor:
44 * Collection (Physical), Collection (Physical),
45 * Report ID (1), Report ID (1),
46 * Report Count (5), -> Report Count (8),
47 * Report Size (1), Report Size (1),
48 * Usage Page (Button), Usage Page (Button),
49 * Usage Minimum (01h), Usage Minimum (01h),
50 * Usage Maximum (05h), -> Usage Maximum (08h),
51 * Logical Minimum (0), Logical Minimum (0),
52 * Logical Maximum (1), Logical Maximum (1),
53 * Input (Variable), Input (Variable),
54 * Report Count (1), -> Report Count (0),
55 * Report Size (3), Report Size (3),
56 * Input (Constant), Input (Constant),
57 * Report Size (16), Report Size (16),
58 * Report Count (2), Report Count (2),
59 * Usage Page (Desktop), Usage Page (Desktop),
60 * Usage (X), Usage (X),
61 * Usage (Y), Usage (Y),
62 * Logical Minimum (-32768), Logical Minimum (-32768),
63 * Logical Maximum (32767), Logical Maximum (32767),
64 * Input (Variable, Relative), Input (Variable, Relative),
65 * End Collection, End Collection,
67 if (*rsize
== 213 && rdesc
[13] == 5 && rdesc
[21] == 5) {
68 hid_info(hdev
, "Fixing up Elecom DEFT/HUGE Fn buttons\n");
69 rdesc
[13] = 8; /* Button/Variable Report Count */
70 rdesc
[21] = 8; /* Button/Variable Usage Maximum */
71 rdesc
[29] = 0; /* Button/Constant Report Count */
78 static const struct hid_device_id elecom_devices
[] = {
79 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM
, USB_DEVICE_ID_ELECOM_BM084
) },
80 { HID_USB_DEVICE(USB_VENDOR_ID_ELECOM
, USB_DEVICE_ID_ELECOM_DEFT_WIRED
) },
81 { HID_USB_DEVICE(USB_VENDOR_ID_ELECOM
, USB_DEVICE_ID_ELECOM_DEFT_WIRELESS
) },
82 { HID_USB_DEVICE(USB_VENDOR_ID_ELECOM
, USB_DEVICE_ID_ELECOM_HUGE_WIRED
) },
83 { HID_USB_DEVICE(USB_VENDOR_ID_ELECOM
, USB_DEVICE_ID_ELECOM_HUGE_WIRELESS
) },
86 MODULE_DEVICE_TABLE(hid
, elecom_devices
);
88 static struct hid_driver elecom_driver
= {
90 .id_table
= elecom_devices
,
91 .report_fixup
= elecom_report_fixup
93 module_hid_driver(elecom_driver
);
95 MODULE_LICENSE("GPL");