From: Karl Cayme Date: Sat, 21 Mar 2026 12:42:49 +0000 (+0800) Subject: HID: rakk: add support for Rakk Dasig X side buttons X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=15a0449c955c862045c17f35d9479791981e7812;p=thirdparty%2Flinux.git HID: rakk: add support for Rakk Dasig X side buttons 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 Signed-off-by: Karl Cayme Signed-off-by: Jiri Kosina --- diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index ff2f580b660ba..0fdb794cea24d 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -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 diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 0597fd6a4ffd3..dd7ba9db01ae4 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -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 diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 0cf63742315bf..847889d63276c 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -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 diff --git a/drivers/hid/hid-rakk.c b/drivers/hid/hid-rakk.c new file mode 100644 index 0000000000000..1140058a76ca4 --- /dev/null +++ b/drivers/hid/hid-rakk.c @@ -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 +#include +#include +#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");