| Ilya Skriblovsky | 9515772 | 2021-09-19 14:12:36 +0300 | [diff] [blame] | 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"); |