lunatik/examples/xiaomi.lua at master · luainkernel/lunatik · GitHub

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--
-- SPDX-FileCopyrightText: (c) 2025-2026 Jieming Zhou <qrsikno@gmail.com>
-- SPDX-License-Identifier: MIT OR GPL-2.0-only
--

-- Porting Xiaomi Silent Mouse's Kernel driver to work with luahid.
-- Link: https://elixir.bootlin.com/linux/v6.16.3/source/drivers/hid/hid-xiaomi.c

local hid = require("hid")

local driver = {name = "luahid_xiaomi", id_table = {{bus = 0x05, vendor = 0x2717, product = 0x5014}}}

local mi_silent_mouse_orig_rdesc_length = 87
local mi_silent_mouse_rdesc_fixed = {
	0x05, 0x01, --  Usage Page (Desktop),
	0x09, 0x02, --  Usage (Mouse),
	0xA1, 0x01, --  Collection (Application),
	0x85, 0x03, --      Report ID (3),
	0x09, 0x01, --      Usage (Pointer),
	0xA1, 0x00, --      Collection (Physical),
	0x05, 0x09, --          Usage Page (Button),
	0x19, 0x01, --          Usage Minimum (01h),
	0x29, 0x05, -- X  --    Usage Maximum (05h),
	0x15, 0x00, --          Logical Minimum (0),
	0x25, 0x01, --          Logical Maximum (1),
	0x75, 0x01, --          Report Size (1),
	0x95, 0x05, --          Report Count (5),
	0x81, 0x02, --          Input (Variable),
	0x75, 0x03, --          Report Size (3),
	0x95, 0x01, --          Report Count (1),
	0x81, 0x01, --          Input (Constant),
	0x05, 0x01, --          Usage Page (Desktop),
	0x09, 0x30, --          Usage (X),
	0x09, 0x31, --          Usage (Y),
	0x15, 0x81, --          Logical Minimum (-127),
	0x25, 0x7F, --          Logical Maximum (127),
	0x75, 0x08, --          Report Size (8),
	0x95, 0x02, --          Report Count (2),
	0x81, 0x06, --          Input (Variable, Relative),
	0x09, 0x38, --          Usage (Wheel),
	0x15, 0x81, --          Logical Minimum (-127),
	0x25, 0x7F, --          Logical Maximum (127),
	0x75, 0x08, --          Report Size (8),
	0x95, 0x01, --          Report Count (1),
	0x81, 0x06, --          Input (Variable, Relative),
	0xC0,      --      End Collection,
	0xC0,      --  End Collection,
	0x06, 0x01, 0xFF, --  Usage Page (FF01h),
	0x09, 0x01, --  Usage (01h),
	0xA1, 0x01, --  Collection (Application),
	0x85, 0x05, --      Report ID (5),
	0x09, 0x05, --      Usage (05h),
	0x15, 0x00, --      Logical Minimum (0),
	0x26, 0xFF, 0x00, --      Logical Maximum (255),
	0x75, 0x08, --      Report Size (8),
	0x95, 0x04, --      Report Count (4),
	0xB1, 0x02, --      Feature (Variable),
	0xC0       --  End Collection
}

function driver:report_fixup(hdev, report, data)
	if hdev.product == 0x5014 and #report == mi_silent_mouse_orig_rdesc_length then
		print("Fixing Xiaomi Silent Mouse report descriptor")
		for i = 1, #mi_silent_mouse_rdesc_fixed do
			report:setbyte(i - 1, mi_silent_mouse_rdesc_fixed[i])
		end
	end
end

hid.register(driver)