cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hid-gyration.c (2681B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  HID driver for some gyration "special" devices
      4 *
      5 *  Copyright (c) 1999 Andreas Gal
      6 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
      7 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
      8 *  Copyright (c) 2008 Jiri Slaby
      9 *  Copyright (c) 2006-2008 Jiri Kosina
     10 */
     11
     12/*
     13 */
     14
     15#include <linux/device.h>
     16#include <linux/input.h>
     17#include <linux/hid.h>
     18#include <linux/module.h>
     19
     20#include "hid-ids.h"
     21
     22#define gy_map_key_clear(c)	hid_map_usage_clear(hi, usage, bit, max, \
     23					EV_KEY, (c))
     24static int gyration_input_mapping(struct hid_device *hdev, struct hid_input *hi,
     25		struct hid_field *field, struct hid_usage *usage,
     26		unsigned long **bit, int *max)
     27{
     28	if ((usage->hid & HID_USAGE_PAGE) != HID_UP_LOGIVENDOR)
     29		return 0;
     30
     31	set_bit(EV_REP, hi->input->evbit);
     32	switch (usage->hid & HID_USAGE) {
     33	/* Reported on Gyration MCE Remote */
     34	case 0x00d: gy_map_key_clear(KEY_HOME);		break;
     35	case 0x024: gy_map_key_clear(KEY_DVD);		break;
     36	case 0x025: gy_map_key_clear(KEY_PVR);		break;
     37	case 0x046: gy_map_key_clear(KEY_MEDIA);	break;
     38	case 0x047: gy_map_key_clear(KEY_MP3);		break;
     39	case 0x048: gy_map_key_clear(KEY_MEDIA);	break;
     40	case 0x049: gy_map_key_clear(KEY_CAMERA);	break;
     41	case 0x04a: gy_map_key_clear(KEY_VIDEO);	break;
     42	case 0x05a: gy_map_key_clear(KEY_TEXT);		break;
     43	case 0x05b: gy_map_key_clear(KEY_RED);		break;
     44	case 0x05c: gy_map_key_clear(KEY_GREEN);	break;
     45	case 0x05d: gy_map_key_clear(KEY_YELLOW);	break;
     46	case 0x05e: gy_map_key_clear(KEY_BLUE);		break;
     47
     48	default:
     49		return 0;
     50	}
     51	return 1;
     52}
     53
     54static int gyration_event(struct hid_device *hdev, struct hid_field *field,
     55		struct hid_usage *usage, __s32 value)
     56{
     57
     58	if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
     59		return 0;
     60
     61	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_GENDESK &&
     62			(usage->hid & 0xff) == 0x82) {
     63		struct input_dev *input = field->hidinput->input;
     64		input_event(input, usage->type, usage->code, 1);
     65		input_sync(input);
     66		input_event(input, usage->type, usage->code, 0);
     67		input_sync(input);
     68		return 1;
     69	}
     70
     71	return 0;
     72}
     73
     74static const struct hid_device_id gyration_devices[] = {
     75	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
     76	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
     77	{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
     78	{ }
     79};
     80MODULE_DEVICE_TABLE(hid, gyration_devices);
     81
     82static struct hid_driver gyration_driver = {
     83	.name = "gyration",
     84	.id_table = gyration_devices,
     85	.input_mapping = gyration_input_mapping,
     86	.event = gyration_event,
     87};
     88module_hid_driver(gyration_driver);
     89
     90MODULE_LICENSE("GPL");