// SPDX-License-Identifier: GPL-2.0
/*
* HID driver for Xiaomi Mi Dual Mode Wireless Mouse Silent Edition
*
* Copyright (c) 2021 Ilya Skriblovsky
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/hid.h>
#include "hid-ids.h"
/* Fixed Mi Silent Mouse report descriptor */
/* Button's Usage Maximum changed from 3 to 5 to make side buttons work */
#define MI_SILENT_MOUSE_ORIG_RDESC_LENGTH 87
static __u8 mi_silent_mouse_rdesc_fixed[] = {
0x05, 0x01, /* Usage Page (Desktop), */
0x09, 0x02, /* Usage (Mouse), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x03, /* Report ID (3), */
0x09, 0x01, /* Usage (Pointer), */
0xA1, 0x00, /* Collection (Physical), */
0x05, 0x09, /* Usage Page (Button), */
0x19, 0x01, /* Usage Minimum (01h), */
0x29, 0x05, /* X */ /* Usage Maximum (05h), */
0x15, 0x00, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x75, 0x01, /* Report Size (1), */
0x95, 0x05, /* Report Count (5), */
0x81, 0x02, /* Input (Variable), */
0x75, 0x03, /* Report Size (3), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x01, /* Input (Constant), */
0x05, 0x01, /* Usage Page (Desktop), */
0x09, 0x30, /* Usage (X), */
0x09, 0x31, /* Usage (Y), */
0x15, 0x81, /* Logical Minimum (-127), */
0x25, 0x7F, /* Logical Maximum (127), */
0x75, 0x08, /* Report Size (8), */
0x95, 0x02, /* Report Count (2), */
0x81, 0x06, /* Input (Variable, Relative), */
0x09, 0x38, /* Usage (Wheel), */
0x15, 0x81, /* Logical Minimum (-127), */
0x25, 0x7F, /* Logical Maximum (127), */
0x75, 0x08, /* Report Size (8), */
0x95, 0x01, /* Report Count (1), */
0x81, 0x06, /* Input (Variable, Relative), */
0xC0, /* End Collection, */
0xC0, /* End Collection, */
0x06, 0x01, 0xFF, /* Usage Page (FF01h), */
0x09, 0x01, /* Usage (01h), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x05, /* Report ID (5), */
0x09, 0x05, /* Usage (05h), */
0x15, 0x00, /* Logical Minimum (0), */
0x26, 0xFF, 0x00, /* Logical Maximum (255), */
0x75, 0x08, /* Report Size (8), */
0x95, 0x04, /* Report Count (4), */
0xB1, 0x02, /* Feature (Variable), */
0xC0 /* End Collection */
};
static __u8 *xiaomi_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
switch (hdev->product) {
case USB_DEVICE_ID_MI_SILENT_MOUSE:
if (*rsize == MI_SILENT_MOUSE_ORIG_RDESC_LENGTH) {
hid_info(hdev, "fixing up Mi Silent Mouse report descriptor\n");
rdesc = mi_silent_mouse_rdesc_fixed;
*rsize = sizeof(mi_silent_mouse_rdesc_fixed);
}
break;
}
return rdesc;
}
static const struct hid_device_id xiaomi_devices[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) },
{ }
};
MODULE_DEVICE_TABLE(hid, xiaomi_devices);
static struct hid_driver xiaomi_driver = {
.name = "xiaomi",
.id_table = xiaomi_devices,
.report_fixup = xiaomi_report_fixup,
};
module_hid_driver(xiaomi_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>");
MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse");
