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29f316a1d7
Make function buttons on ELECOM M-HT1DRBK trackball mouse work. This model has two devices with different device IDs (010D and 011C). Both of them misreports the number of buttons as 5 in the report descriptor, even though they have 8 buttons. hid-elecom overwrites the report to fix them, but supports only on 010D and does not work on 011C. This patch fixes 011C in the similar way but with specialized position parameters. In fact, it is sufficient to rewrite only 17th byte (05 -> 08). However I followed the existing way. Signed-off-by: Takahiro Fujii <fujii@xaxxi.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
139 lines
4.7 KiB
C
139 lines
4.7 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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* Copyright (c) 2020 YOSHIOKA Takuma <lo48576@hard-wi.red>
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* Copyright (c) 2022 Takahiro Fujii <fujii@xaxxi.net>
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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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#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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unsigned int button_bit_count,
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unsigned int padding_bit,
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unsigned int button_report_size,
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unsigned int button_usage_maximum,
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int nbuttons)
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{
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if (rsize < 32 || rdesc[button_bit_count] != 0x95 ||
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rdesc[button_report_size] != 0x75 ||
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rdesc[button_report_size + 1] != 0x01 ||
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rdesc[button_usage_maximum] != 0x29 || rdesc[padding_bit] != 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[button_bit_count + 1] = nbuttons;
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rdesc[button_usage_maximum + 1] = nbuttons;
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rdesc[padding_bit + 1] = 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_XGL20DLBK:
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/*
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* Report descriptor format:
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* 20: button bit count
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* 28: padding bit count
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* 22: button report size
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* 14: button usage maximum
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*/
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mouse_button_fixup(hdev, rdesc, *rsize, 20, 28, 22, 14, 8);
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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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/*
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* Report descriptor format:
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* 12: button bit count
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* 30: padding bit count
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* 14: button report size
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* 20: button usage maximum
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*/
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mouse_button_fixup(hdev, rdesc, *rsize, 12, 30, 14, 20, 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_010D:
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/*
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* Report descriptor format:
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* 12: button bit count
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* 30: padding bit count
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* 14: button report size
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* 20: button usage maximum
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*/
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mouse_button_fixup(hdev, rdesc, *rsize, 12, 30, 14, 20, 8);
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break;
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case USB_DEVICE_ID_ELECOM_M_HT1DRBK_011C:
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/*
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* Report descriptor format:
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* 22: button bit count
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* 30: padding bit count
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* 24: button report size
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* 16: button usage maximum
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*/
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mouse_button_fixup(hdev, rdesc, *rsize, 22, 30, 24, 16, 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_XGL20DLBK) },
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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_010D) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_M_HT1DRBK_011C) },
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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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