128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* HID driver for ELECOM devices:
|
|
* - BM084 Bluetooth Mouse
|
|
* - EX-G Trackballs (M-XT3DRBK, M-XT3URBK, M-XT4DRBK)
|
|
* - DEFT Trackballs (M-DT1DRBK, M-DT1URBK, M-DT2DRBK, M-DT2URBK)
|
|
* - HUGE Trackballs (M-HT1DRBK, M-HT1URBK)
|
|
*
|
|
* Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
|
|
* Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
|
|
* Copyright (c) 2017 Diego Elio Pettenò <flameeyes@flameeyes.eu>
|
|
* Copyright (c) 2017 Alex Manoussakis <amanou@gnu.org>
|
|
* Copyright (c) 2017 Tomasz Kramkowski <tk@the-tk.com>
|
|
* Copyright (c) 2020 YOSHIOKA Takuma <lo48576@hard-wi.red>
|
|
*/
|
|
|
|
/*
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "hid-ids.h"
|
|
|
|
/*
|
|
* Certain ELECOM mice misreport their button count meaning that they only work
|
|
* correctly with the ELECOM mouse assistant software which is unavailable for
|
|
* Linux. A four extra INPUT reports and a FEATURE report are described by the
|
|
* report descriptor but it does not appear that these enable software to
|
|
* control what the extra buttons map to. The only simple and straightforward
|
|
* solution seems to involve fixing up the report descriptor.
|
|
*/
|
|
#define MOUSE_BUTTONS_MAX 8
|
|
static void mouse_button_fixup(struct hid_device *hdev,
|
|
__u8 *rdesc, unsigned int rsize,
|
|
unsigned int button_bit_count,
|
|
unsigned int padding_bit,
|
|
unsigned int button_report_size,
|
|
unsigned int button_usage_maximum,
|
|
int nbuttons)
|
|
{
|
|
if (rsize < 32 || rdesc[button_bit_count] != 0x95 ||
|
|
rdesc[button_report_size] != 0x75 ||
|
|
rdesc[button_report_size + 1] != 0x01 ||
|
|
rdesc[button_usage_maximum] != 0x29 || rdesc[padding_bit] != 0x75)
|
|
return;
|
|
hid_info(hdev, "Fixing up Elecom mouse button count\n");
|
|
nbuttons = clamp(nbuttons, 0, MOUSE_BUTTONS_MAX);
|
|
rdesc[button_bit_count + 1] = nbuttons;
|
|
rdesc[button_usage_maximum + 1] = nbuttons;
|
|
rdesc[padding_bit + 1] = MOUSE_BUTTONS_MAX - nbuttons;
|
|
}
|
|
|
|
static __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
|
|
unsigned int *rsize)
|
|
{
|
|
switch (hdev->product) {
|
|
case USB_DEVICE_ID_ELECOM_BM084:
|
|
/* The BM084 Bluetooth mouse includes a non-existing horizontal
|
|
* wheel in the HID descriptor. */
|
|
if (*rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
|
|
hid_info(hdev, "Fixing up Elecom BM084 report descriptor\n");
|
|
rdesc[47] = 0x00;
|
|
}
|
|
break;
|
|
case USB_DEVICE_ID_ELECOM_M_XGL20DLBK:
|
|
/*
|
|
* Report descriptor format:
|
|
* 20: button bit count
|
|
* 28: padding bit count
|
|
* 22: button report size
|
|
* 14: button usage maximum
|
|
*/
|
|
mouse_button_fixup(hdev, rdesc, *rsize, 20, 28, 22, 14, 8);
|
|
break;
|
|
case USB_DEVICE_ID_ELECOM_M_XT3URBK:
|
|
case USB_DEVICE_ID_ELECOM_M_XT3DRBK:
|
|
case USB_DEVICE_ID_ELECOM_M_XT4DRBK:
|
|
/*
|
|
* Report descriptor format:
|
|
* 12: button bit count
|
|
* 30: padding bit count
|
|
* 14: button report size
|
|
* 20: button usage maximum
|
|
*/
|
|
mouse_button_fixup(hdev, rdesc, *rsize, 12, 30, 14, 20, 6);
|
|
break;
|
|
case USB_DEVICE_ID_ELECOM_M_DT1URBK:
|
|
case USB_DEVICE_ID_ELECOM_M_DT1DRBK:
|
|
case USB_DEVICE_ID_ELECOM_M_HT1URBK:
|
|
case USB_DEVICE_ID_ELECOM_M_HT1DRBK:
|
|
/*
|
|
* Report descriptor format:
|
|
* 12: button bit count
|
|
* 30: padding bit count
|
|
* 14: button report size
|
|
* 20: button usage maximum
|
|
*/
|
|
mouse_button_fixup(hdev, rdesc, *rsize, 12, 30, 14, 20, 8);
|
|
break;
|
|
}
|
|
return rdesc;
|
|
}
|
|
|
|
static const struct hid_device_id elecom_devices[] = {
|
|
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XGL20DLBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3DRBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT4DRBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_DT1URBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_DT1DRBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_HT1URBK) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_HT1DRBK) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, elecom_devices);
|
|
|
|
static struct hid_driver elecom_driver = {
|
|
.name = "elecom",
|
|
.id_table = elecom_devices,
|
|
.report_fixup = elecom_report_fixup
|
|
};
|
|
module_hid_driver(elecom_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|