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-betopff.c (3878B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  Force feedback support for Betop based devices
      4 *
      5 *  The devices are distributed under various names and the same USB device ID
      6 *  can be used in both adapters and actual game controllers.
      7 *
      8 *  0x11c2:0x2208 "BTP2185 BFM mode Joystick"
      9 *   - tested with BTP2185 BFM Mode.
     10 *
     11 *  0x11C0:0x5506 "BTP2185 PC mode Joystick"
     12 *   - tested with BTP2185 PC Mode.
     13 *
     14 *  0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad"
     15 *   - tested with BTP2185 PC Mode with another version.
     16 *
     17 *  0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick"
     18 *   - tested with BTP2171s.
     19 *  Copyright (c) 2014 Huang Bo <huangbobupt@163.com>
     20 */
     21
     22/*
     23 */
     24
     25
     26#include <linux/input.h>
     27#include <linux/slab.h>
     28#include <linux/module.h>
     29#include <linux/hid.h>
     30
     31#include "hid-ids.h"
     32
     33struct betopff_device {
     34	struct hid_report *report;
     35};
     36
     37static int hid_betopff_play(struct input_dev *dev, void *data,
     38			 struct ff_effect *effect)
     39{
     40	struct hid_device *hid = input_get_drvdata(dev);
     41	struct betopff_device *betopff = data;
     42	__u16 left, right;
     43
     44	left = effect->u.rumble.strong_magnitude;
     45	right = effect->u.rumble.weak_magnitude;
     46
     47	betopff->report->field[2]->value[0] = left / 256;
     48	betopff->report->field[3]->value[0] = right / 256;
     49
     50	hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
     51
     52	return 0;
     53}
     54
     55static int betopff_init(struct hid_device *hid)
     56{
     57	struct betopff_device *betopff;
     58	struct hid_report *report;
     59	struct hid_input *hidinput;
     60	struct list_head *report_list =
     61			&hid->report_enum[HID_OUTPUT_REPORT].report_list;
     62	struct input_dev *dev;
     63	int field_count = 0;
     64	int error;
     65	int i, j;
     66
     67	if (list_empty(&hid->inputs)) {
     68		hid_err(hid, "no inputs found\n");
     69		return -ENODEV;
     70	}
     71
     72	hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
     73	dev = hidinput->input;
     74
     75	if (list_empty(report_list)) {
     76		hid_err(hid, "no output reports found\n");
     77		return -ENODEV;
     78	}
     79
     80	report = list_first_entry(report_list, struct hid_report, list);
     81	/*
     82	 * Actually there are 4 fields for 4 Bytes as below:
     83	 * -----------------------------------------
     84	 * Byte0  Byte1  Byte2	  Byte3
     85	 * 0x00   0x00   left_motor right_motor
     86	 * -----------------------------------------
     87	 * Do init them with default value.
     88	 */
     89	for (i = 0; i < report->maxfield; i++) {
     90		for (j = 0; j < report->field[i]->report_count; j++) {
     91			report->field[i]->value[j] = 0x00;
     92			field_count++;
     93		}
     94	}
     95
     96	if (field_count < 4) {
     97		hid_err(hid, "not enough fields in the report: %d\n",
     98				field_count);
     99		return -ENODEV;
    100	}
    101
    102	betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
    103	if (!betopff)
    104		return -ENOMEM;
    105
    106	set_bit(FF_RUMBLE, dev->ffbit);
    107
    108	error = input_ff_create_memless(dev, betopff, hid_betopff_play);
    109	if (error) {
    110		kfree(betopff);
    111		return error;
    112	}
    113
    114	betopff->report = report;
    115	hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
    116
    117	hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
    118
    119	return 0;
    120}
    121
    122static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
    123{
    124	int ret;
    125
    126	if (id->driver_data)
    127		hdev->quirks |= HID_QUIRK_MULTI_INPUT;
    128
    129	ret = hid_parse(hdev);
    130	if (ret) {
    131		hid_err(hdev, "parse failed\n");
    132		goto err;
    133	}
    134
    135	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
    136	if (ret) {
    137		hid_err(hdev, "hw start failed\n");
    138		goto err;
    139	}
    140
    141	betopff_init(hdev);
    142
    143	return 0;
    144err:
    145	return ret;
    146}
    147
    148static const struct hid_device_id betop_devices[] = {
    149	{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
    150	{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
    151	{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
    152	{ HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
    153	{ }
    154};
    155MODULE_DEVICE_TABLE(hid, betop_devices);
    156
    157static struct hid_driver betop_driver = {
    158	.name = "betop",
    159	.id_table = betop_devices,
    160	.probe = betop_probe,
    161};
    162module_hid_driver(betop_driver);
    163
    164MODULE_LICENSE("GPL");