1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * HID driver for Xiaomi Mi Dual Mode Wireless Mouse Silent Edition 4 * 5 * Copyright (c) 2021 Ilya Skriblovsky 6 */ 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 87 17 static __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 64 static __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 rdesc = mi_silent_mouse_rdesc_fixed; 72 *rsize = sizeof(mi_silent_mouse_rdesc_fixed); 73 } 74 break; 75 } 76 return rdesc; 77 } 78 79 static const struct hid_device_id xiaomi_devices[] = { 80 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) }, 81 { } 82 }; 83 MODULE_DEVICE_TABLE(hid, xiaomi_devices); 84 85 static struct hid_driver xiaomi_driver = { 86 .name = "xiaomi", 87 .id_table = xiaomi_devices, 88 .report_fixup = xiaomi_report_fixup, 89 }; 90 module_hid_driver(xiaomi_driver); 91 92 MODULE_LICENSE("GPL"); 93 MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>"); 94 MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse"); 95