95 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * HID driver for Xiaomi Mi Dual Mode Wireless Mouse Silent Edition4 *5 * Copyright (c) 2021 Ilya Skriblovsky6 */7 8#include <linux/init.h>9#include <linux/module.h>10#include <linux/hid.h>11 12#include "hid-ids.h"13 14/* Fixed Mi Silent Mouse report descriptor */15/* Button's Usage Maximum changed from 3 to 5 to make side buttons work */16#define MI_SILENT_MOUSE_ORIG_RDESC_LENGTH 8717static const __u8 mi_silent_mouse_rdesc_fixed[] = {18 0x05, 0x01, /* Usage Page (Desktop), */19 0x09, 0x02, /* Usage (Mouse), */20 0xA1, 0x01, /* Collection (Application), */21 0x85, 0x03, /* Report ID (3), */22 0x09, 0x01, /* Usage (Pointer), */23 0xA1, 0x00, /* Collection (Physical), */24 0x05, 0x09, /* Usage Page (Button), */25 0x19, 0x01, /* Usage Minimum (01h), */26 0x29, 0x05, /* X */ /* Usage Maximum (05h), */27 0x15, 0x00, /* Logical Minimum (0), */28 0x25, 0x01, /* Logical Maximum (1), */29 0x75, 0x01, /* Report Size (1), */30 0x95, 0x05, /* Report Count (5), */31 0x81, 0x02, /* Input (Variable), */32 0x75, 0x03, /* Report Size (3), */33 0x95, 0x01, /* Report Count (1), */34 0x81, 0x01, /* Input (Constant), */35 0x05, 0x01, /* Usage Page (Desktop), */36 0x09, 0x30, /* Usage (X), */37 0x09, 0x31, /* Usage (Y), */38 0x15, 0x81, /* Logical Minimum (-127), */39 0x25, 0x7F, /* Logical Maximum (127), */40 0x75, 0x08, /* Report Size (8), */41 0x95, 0x02, /* Report Count (2), */42 0x81, 0x06, /* Input (Variable, Relative), */43 0x09, 0x38, /* Usage (Wheel), */44 0x15, 0x81, /* Logical Minimum (-127), */45 0x25, 0x7F, /* Logical Maximum (127), */46 0x75, 0x08, /* Report Size (8), */47 0x95, 0x01, /* Report Count (1), */48 0x81, 0x06, /* Input (Variable, Relative), */49 0xC0, /* End Collection, */50 0xC0, /* End Collection, */51 0x06, 0x01, 0xFF, /* Usage Page (FF01h), */52 0x09, 0x01, /* Usage (01h), */53 0xA1, 0x01, /* Collection (Application), */54 0x85, 0x05, /* Report ID (5), */55 0x09, 0x05, /* Usage (05h), */56 0x15, 0x00, /* Logical Minimum (0), */57 0x26, 0xFF, 0x00, /* Logical Maximum (255), */58 0x75, 0x08, /* Report Size (8), */59 0x95, 0x04, /* Report Count (4), */60 0xB1, 0x02, /* Feature (Variable), */61 0xC0 /* End Collection */62};63 64static const __u8 *xiaomi_report_fixup(struct hid_device *hdev, __u8 *rdesc,65 unsigned int *rsize)66{67 switch (hdev->product) {68 case USB_DEVICE_ID_MI_SILENT_MOUSE:69 if (*rsize == MI_SILENT_MOUSE_ORIG_RDESC_LENGTH) {70 hid_info(hdev, "fixing up Mi Silent Mouse report descriptor\n");71 *rsize = sizeof(mi_silent_mouse_rdesc_fixed);72 return mi_silent_mouse_rdesc_fixed;73 }74 break;75 }76 return rdesc;77}78 79static const struct hid_device_id xiaomi_devices[] = {80 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) },81 { }82};83MODULE_DEVICE_TABLE(hid, xiaomi_devices);84 85static struct hid_driver xiaomi_driver = {86 .name = "xiaomi",87 .id_table = xiaomi_devices,88 .report_fixup = xiaomi_report_fixup,89};90module_hid_driver(xiaomi_driver);91 92MODULE_LICENSE("GPL");93MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>");94MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse");95