| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * HID driver for Xiaomi Mi Dual Mode Wireless Mouse Silent Edition |
| * |
| * Copyright (c) 2021 Ilya Skriblovsky |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/hid.h> |
| |
| #include "hid-ids.h" |
| |
| /* Fixed Mi Silent Mouse report descriptor */ |
| /* Button's Usage Maximum changed from 3 to 5 to make side buttons work */ |
| #define MI_SILENT_MOUSE_ORIG_RDESC_LENGTH 87 |
| static const __u8 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 */ |
| }; |
| |
| static const __u8 *xiaomi_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
| unsigned int *rsize) |
| { |
| switch (hdev->product) { |
| case USB_DEVICE_ID_MI_SILENT_MOUSE: |
| if (*rsize == MI_SILENT_MOUSE_ORIG_RDESC_LENGTH) { |
| hid_info(hdev, "fixing up Mi Silent Mouse report descriptor\n"); |
| *rsize = sizeof(mi_silent_mouse_rdesc_fixed); |
| return mi_silent_mouse_rdesc_fixed; |
| } |
| break; |
| } |
| return rdesc; |
| } |
| |
| static const struct hid_device_id xiaomi_devices[] = { |
| { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(hid, xiaomi_devices); |
| |
| static struct hid_driver xiaomi_driver = { |
| .name = "xiaomi", |
| .id_table = xiaomi_devices, |
| .report_fixup = xiaomi_report_fixup, |
| }; |
| module_hid_driver(xiaomi_driver); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>"); |
| MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse"); |
