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
xiaomi_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)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