2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for ELECOM devices:
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* - BM084 Bluetooth Mouse
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* - EX-G Trackballs (M-XT3DRBK, M-XT3URBK, M-XT4DRBK)
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* - DEFT Trackballs (M-DT1DRBK, M-DT1URBK, M-DT2DRBK, M-DT2URBK)
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* - HUGE Trackballs (M-HT1DRBK, M-HT1URBK)
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*
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* Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
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* Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
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* Copyright (c) 2017 Diego Elio Pettenò <flameeyes@flameeyes.eu>
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* Copyright (c) 2017 Alex Manoussakis <amanou@gnu.org>
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* Copyright (c) 2017 Tomasz Kramkowski <tk@the-tk.com>
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*/
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/*
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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/*
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* Certain ELECOM mice misreport their button count meaning that they only work
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* correctly with the ELECOM mouse assistant software which is unavailable for
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* Linux. A four extra INPUT reports and a FEATURE report are described by the
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* report descriptor but it does not appear that these enable software to
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* control what the extra buttons map to. The only simple and straightforward
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* solution seems to involve fixing up the report descriptor.
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*
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* Report descriptor format:
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* Positions 13, 15, 21 and 31 store the button bit count, button usage minimum,
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* button usage maximum and padding bit count respectively.
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*/
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#define MOUSE_BUTTONS_MAX 8
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static void mouse_button_fixup(struct hid_device *hdev,
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__u8 *rdesc, unsigned int rsize,
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int nbuttons)
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{
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if (rsize < 32 || rdesc[12] != 0x95 ||
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rdesc[14] != 0x75 || rdesc[15] != 0x01 ||
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rdesc[20] != 0x29 || rdesc[30] != 0x75)
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return;
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hid_info(hdev, "Fixing up Elecom mouse button count\n");
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nbuttons = clamp(nbuttons, 0, MOUSE_BUTTONS_MAX);
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rdesc[13] = nbuttons;
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rdesc[21] = nbuttons;
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rdesc[31] = MOUSE_BUTTONS_MAX - nbuttons;
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}
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static __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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unsigned int *rsize)
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{
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switch (hdev->product) {
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case USB_DEVICE_ID_ELECOM_BM084:
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/* The BM084 Bluetooth mouse includes a non-existing horizontal
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* wheel in the HID descriptor. */
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if (*rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
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hid_info(hdev, "Fixing up Elecom BM084 report descriptor\n");
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rdesc[47] = 0x00;
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}
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break;
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case USB_DEVICE_ID_ELECOM_M_XT3URBK:
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case USB_DEVICE_ID_ELECOM_M_XT3DRBK:
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case USB_DEVICE_ID_ELECOM_M_XT4DRBK:
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mouse_button_fixup(hdev, rdesc, *rsize, 6);
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break;
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case USB_DEVICE_ID_ELECOM_M_DT1URBK:
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case USB_DEVICE_ID_ELECOM_M_DT1DRBK:
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case USB_DEVICE_ID_ELECOM_M_HT1URBK:
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case USB_DEVICE_ID_ELECOM_M_HT1DRBK:
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mouse_button_fixup(hdev, rdesc, *rsize, 8);
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break;
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}
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return rdesc;
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}
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static const struct hid_device_id elecom_devices[] = {
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3URBK) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT3DRBK) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_XT4DRBK) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_DT1URBK) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_DT1DRBK) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_HT1URBK) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_HT1DRBK) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, elecom_devices);
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static struct hid_driver elecom_driver = {
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.name = "elecom",
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.id_table = elecom_devices,
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.report_fixup = elecom_report_fixup
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};
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module_hid_driver(elecom_driver);
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MODULE_LICENSE("GPL");
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