cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

hid-xiaomi.c (4198B)

      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
     17static __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
     64static __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
     79static const struct hid_device_id xiaomi_devices[] = {
     80	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_XIAOMI, USB_DEVICE_ID_MI_SILENT_MOUSE) },
     81	{ }
     82};
     83MODULE_DEVICE_TABLE(hid, xiaomi_devices);
     84
     85static struct hid_driver xiaomi_driver = {
     86	.name = "xiaomi",
     87	.id_table = xiaomi_devices,
     88	.report_fixup = xiaomi_report_fixup,
     89};
     90module_hid_driver(xiaomi_driver);
     91
     92MODULE_LICENSE("GPL");
     93MODULE_AUTHOR("Ilya Skriblovsky <IlyaSkriblovsky@gmail.com>");
     94MODULE_DESCRIPTION("Fixing side buttons of Xiaomi Mi Silent Mouse");