1*95157723SIlya Skriblovsky // SPDX-License-Identifier: GPL-2.0 2*95157723SIlya Skriblovsky /* 3*95157723SIlya Skriblovsky * HID driver for Xiaomi Mi Dual Mode Wireless Mouse Silent Edition 4*95157723SIlya Skriblovsky * 5*95157723SIlya Skriblovsky * Copyright (c) 2021 Ilya Skriblovsky 6*95157723SIlya Skriblovsky */ 7*95157723SIlya Skriblovsky 8*95157723SIlya Skriblovsky #include <linux/init.h> 9*95157723SIlya Skriblovsky #include <linux/module.h> 10*95157723SIlya Skriblovsky #include <linux/hid.h> 11*95157723SIlya Skriblovsky 12*95157723SIlya Skriblovsky #include "hid-ids.h" 13*95157723SIlya Skriblovsky 14*95157723SIlya Skriblovsky /* Fixed Mi Silent Mouse report descriptor */ 15*95157723SIlya Skriblovsky /* Button's Usage Maximum changed from 3 to 5 to make side buttons work */ 16*95157723SIlya Skriblovsky #define MI_SILENT_MOUSE_ORIG_RDESC_LENGTH 87 17*95157723SIlya Skriblovsky static __u8 mi_silent_mouse_rdesc_fixed[] = { 18*95157723SIlya Skriblovsky 0x05, 0x01, /* Usage Page (Desktop), */ 19*95157723SIlya Skriblovsky 0x09, 0x02, /* Usage (Mouse), */ 20*95157723SIlya Skriblovsky 0xA1, 0x01, /* Collection (Application), */ 21*95157723SIlya Skriblovsky 0x85, 0x03, /* Report ID (3), */ 22*95157723SIlya Skriblovsky 0x09, 0x01, /* Usage (Pointer), */ 23*95157723SIlya Skriblovsky 0xA1, 0x00, /* Collection (Physical), */ 24*95157723SIlya Skriblovsky 0x05, 0x09, /* Usage Page (Button), */ 25*95157723SIlya Skriblovsky 0x19, 0x01, /* Usage Minimum (01h), */ 26*95157723SIlya Skriblovsky 0x29, 0x05, /* X */ /* Usage Maximum (05h), */ 27*95157723SIlya Skriblovsky 0x15, 0x00, /* Logical Minimum (0), */ 28*95157723SIlya Skriblovsky 0x25, 0x01, /* Logical Maximum (1), */ 29*95157723SIlya Skriblovsky 0x75, 0x01, /* Report Size (1), */ 30*95157723SIlya Skriblovsky 0x95, 0x05, /* Report Count (5), */ 31*95157723SIlya Skriblovsky 0x81, 0x02, /* Input (Variable), */ 32*95157723SIlya Skriblovsky 0x75, 0x03, /* Report Size (3), */ 33*95157723SIlya Skriblovsky 0x95, 0x01, /* Report Count (1), */ 34*95157723SIlya Skriblovsky 0x81, 0x01, /* Input (Constant), */ 35*95157723SIlya Skriblovsky 0x05, 0x01, /* Usage Page (Desktop), */ 36*95157723SIlya Skriblovsky 0x09, 0x30, /* Usage (X), */ 37*95157723SIlya Skriblovsky 0x09, 0x31, /* Usage (Y), */ 38*95157723SIlya Skriblovsky 0x15, 0x81, /* Logical Minimum (-127), */ 39*95157723SIlya Skriblovsky 0x25, 0x7F, /* Logical Maximum (127), */ 40*95157723SIlya Skriblovsky 0x75, 0x08, /* Report Size (8), */ 41*95157723SIlya Skriblovsky 0x95, 0x02, /* Report Count (2), */ 42*95157723SIlya Skriblovsky 0x81, 0x06, /* Input (Variable, Relative), */ 43*95157723SIlya Skriblovsky 0x09, 0x38, /* Usage (Wheel), */ 44*95157723SIlya Skriblovsky 0x15, 0x81, /* Logical Minimum (-127), */ 45*95157723SIlya Skriblovsky 0x25, 0x7F, /* Logical Maximum (127), */ 46*95157723SIlya Skriblovsky 0x75, 0x08, /* Report Size (8), */ 47*95157723SIlya Skriblovsky 0x95, 0x01, /* Report Count (1), */ 48*95157723SIlya Skriblovsky 0x81, 0x06, /* Input (Variable, Relative), */ 49*95157723SIlya Skriblovsky 0xC0, /* End Collection, */ 50*95157723SIlya Skriblovsky 0xC0, /* End Collection, */ 51*95157723SIlya Skriblovsky 0x06, 0x01, 0xFF, /* Usage Page (FF01h), */ 52*95157723SIlya Skriblovsky 0x09, 0x01, /* Usage (01h), */ 53*95157723SIlya Skriblovsky 0xA1, 0x01, /* Collection (Application), */ 54*95157723SIlya Skriblovsky 0x85, 0x05, /* Report ID (5), */ 55*95157723SIlya Skriblovsky 0x09, 0x05, /* Usage (05h), */ 56*95157723SIlya Skriblovsky 0x15, 0x00, /* Logical Minimum (0), */ 57*95157723SIlya Skriblovsky 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 58*95157723SIlya Skriblovsky 0x75, 0x08, /* Report Size (8), */ 59*95157723SIlya Skriblovsky 0x95, 0x04, /* Report Count (4), */ 60*95157723SIlya Skriblovsky 0xB1, 0x02, /* Feature (Variable), */ 61*95157723SIlya Skriblovsky 0xC0 /* End Collection */ 62*95157723SIlya Skriblovsky }; 63*95157723SIlya Skriblovsky 64*95157723SIlya Skriblovsky static __u8 *xiaomi_report_fixup(struct hid_device *hdev, __u8 *rdesc, 65*95157723SIlya Skriblovsky unsigned int *rsize) 66*95157723SIlya Skriblovsky { 67*95157723SIlya Skriblovsky switch (hdev->product) { 68*95157723SIlya Skriblovsky case USB_DEVICE_ID_MI_SILENT_MOUSE: 69*95157723SIlya Skriblovsky if (*rsize == MI_SILENT_MOUSE_ORIG_RDESC_LENGTH) { 70*95157723SIlya Skriblovsky hid_info(hdev, "fixing up Mi Silent Mouse report descriptor\n"); 71*95157723SIlya Skriblovsky rdesc = mi_silent_mouse_rdesc_fixed; 72*95157723SIlya Skriblovsky *rsize = sizeof(mi_silent_mouse_rdesc_fixed); 73*95157723SIlya Skriblovsky } 74*95157723SIlya Skriblovsky break; 75*95157723SIlya Skriblovsky } 76*95157723SIlya Skriblovsky return rdesc; 77*95157723SIlya Skriblovsky } 78*95157723SIlya Skriblovsky 79*95157723SIlya Skriblovsky static const struct hid_device_id xiaomi_devices[] = { 80*95157723SIlya Skriblovsky { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) }, 81*95157723SIlya Skriblovsky { } 82*95157723SIlya Skriblovsky }; 83*95157723SIlya Skriblovsky MODULE_DEVICE_TABLE(hid, xiaomi_devices); 84*95157723SIlya Skriblovsky 85*95157723SIlya Skriblovsky static struct hid_driver xiaomi_driver = { 86*95157723SIlya Skriblovsky .name = "xiaomi", 87*95157723SIlya Skriblovsky .id_table = xiaomi_devices, 88*95157723SIlya Skriblovsky .report_fixup = xiaomi_report_fixup, 89*95157723SIlya Skriblovsky }; 90*95157723SIlya Skriblovsky module_hid_driver(xiaomi_driver); 91*95157723SIlya Skriblovsky 92*95157723SIlya Skriblovsky MODULE_LICENSE("GPL"); 93*95157723SIlya Skriblovsky MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>"); 94*95157723SIlya Skriblovsky MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse"); 95