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HID: rakk: add support for Rakk Dasig X side buttons

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The Rakk Dasig X gaming mouse has a faulty HID report descriptor that
declares USAGE_MAXIMUM=3 (buttons 1-3) while actually sending 5 button
bits (REPORT_COUNT=5). This causes the kernel to ignore side buttons
(buttons 4 and 5).

Fix by patching the descriptor to set USAGE_MAXIMUM=5 in the
report_fixup callback.

The mouse uses Telink vendor ID 0x248a with three product IDs for USB
direct (0xfb01), wireless dongle (0xfa02), and Bluetooth (0x8266)
connection modes. All three variants have the same bug at byte offset 17.

Suggested-by: Terry Junge <linuxhid@cosmicgizmosystems.com>
Signed-off-by: Karl Cayme <kcayme@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Karl Cayme 2026-03-21 20:42:49 +08:00 committed by Jiri Kosina
parent d97e7d7c30
commit 15a0449c95
4 changed files with 90 additions and 0 deletions
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9
drivers/hid/Kconfig
View File

@ -766,6 +766,15 @@ config HID_MEGAWORLD_FF
Say Y here if you have a Mega World based game controller and want
to have force feedback support for it.
config HID_RAKK
tristate "Rakk support"
help
Support for Rakk gaming peripherals.
Fixes the HID report descriptor of the Rakk Dasig X mouse,
which declares USAGE_MAXIMUM=3 (buttons 1-3) while actually
sending 5 button bits. This causes side buttons to be ignored.
config HID_REDRAGON
tristate "Redragon keyboards"
help

1
drivers/hid/Makefile
View File

@ -115,6 +115,7 @@ obj-$(CONFIG_HID_PLANTRONICS) += hid-plantronics.o
obj-$(CONFIG_HID_PLAYSTATION) += hid-playstation.o
obj-$(CONFIG_HID_PRIMAX) += hid-primax.o
obj-$(CONFIG_HID_PXRC) += hid-pxrc.o
obj-$(CONFIG_HID_RAKK) += hid-rakk.o
obj-$(CONFIG_HID_RAPOO) += hid-rapoo.o
obj-$(CONFIG_HID_RAZER) += hid-razer.o
obj-$(CONFIG_HID_REDRAGON) += hid-redragon.o

5
drivers/hid/hid-ids.h
View File

@ -1401,6 +1401,11 @@
#define USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5_017 0x73f6
#define USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5 0x81a7
#define USB_VENDOR_ID_TELINK 0x248a
#define USB_DEVICE_ID_TELINK_RAKK_DASIG_X 0xfb01
#define USB_DEVICE_ID_TELINK_RAKK_DASIG_X_DONGLE 0xfa02
#define USB_DEVICE_ID_TELINK_RAKK_DASIG_X_BT 0x8266
#define USB_VENDOR_ID_TEXAS_INSTRUMENTS 0x2047
#define USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA 0x0855

75
drivers/hid/hid-rakk.c Normal file
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@ -0,0 +1,75 @@
// SPDX-License-Identifier: GPL-2.0
/*
* HID driver for Rakk devices
*
* Copyright (c) 2026 Karl Cayme
*
* The Rakk Dasig X gaming mouse has a faulty HID report descriptor that
* declares USAGE_MAXIMUM = 3 (buttons 1-3) while actually sending 5 button
* bits (REPORT_COUNT = 5). This causes the kernel to ignore side buttons
* (buttons 4 and 5). This driver fixes the descriptor so all 5 buttons
* are properly recognized across 3 modes (wired, dongle, and Bluetooth).
*/
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
/*
* The faulty byte is at offset 17 in the report descriptor for all three
* connection modes (USB direct, wireless dongle, and Bluetooth).
*
* Bytes 16-17 are: 0x29 0x03 (USAGE_MAXIMUM = 3)
* The fix changes byte 17 to 0x05 (USAGE_MAXIMUM = 5).
*
* Original descriptor bytes 0-17:
* 05 01 09 02 a1 01 85 01 09 01 a1 00 05 09 19 01 29 03
* ^^
* Should be 0x05 to declare 5 buttons instead of 3.
*/
#define RAKK_RDESC_USAGE_MAX_OFFSET 17
#define RAKK_RDESC_USAGE_MAX_ORIG 0x03
#define RAKK_RDESC_USAGE_MAX_FIXED 0x05
#define RAKK_RDESC_USB_SIZE 193
#define RAKK_RDESC_DONGLE_SIZE 150
#define RAKK_RDESC_BT_SIZE 89
static const __u8 *rakk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
if (((*rsize == RAKK_RDESC_USB_SIZE &&
hdev->product == USB_DEVICE_ID_TELINK_RAKK_DASIG_X) ||
(*rsize == RAKK_RDESC_DONGLE_SIZE &&
hdev->product == USB_DEVICE_ID_TELINK_RAKK_DASIG_X_DONGLE) ||
(*rsize == RAKK_RDESC_BT_SIZE &&
hdev->product == USB_DEVICE_ID_TELINK_RAKK_DASIG_X_BT)) &&
rdesc[RAKK_RDESC_USAGE_MAX_OFFSET] == RAKK_RDESC_USAGE_MAX_ORIG) {
hid_info(hdev, "fixing Rakk Dasig X button count (3 -> 5)\n");
rdesc[RAKK_RDESC_USAGE_MAX_OFFSET] = RAKK_RDESC_USAGE_MAX_FIXED;
}
return rdesc;
}
static const struct hid_device_id rakk_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_TELINK,
USB_DEVICE_ID_TELINK_RAKK_DASIG_X) },
{ HID_USB_DEVICE(USB_VENDOR_ID_TELINK,
USB_DEVICE_ID_TELINK_RAKK_DASIG_X_DONGLE) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_TELINK,
USB_DEVICE_ID_TELINK_RAKK_DASIG_X_BT) },
{ }
};
MODULE_DEVICE_TABLE(hid, rakk_devices);
static struct hid_driver rakk_driver = {
.name = "rakk",
.id_table = rakk_devices,
.report_fixup = rakk_report_fixup,
};
module_hid_driver(rakk_driver);
MODULE_DESCRIPTION("HID driver for Rakk Dasig X mouse - fix side button support");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Karl Cayme");