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95157723 IS |
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"); |