1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Force feedback support for Mayflash game controller adapters.
4 *
5 * These devices are manufactured by Mayflash but identify themselves
6 * using the vendor ID of DragonRise Inc.
7 *
8 * Tested with:
9 * 0079:1801 "DragonRise Inc. Mayflash PS3 Game Controller Adapter"
10 * 0079:1803 "DragonRise Inc. Mayflash Wireless Sensor DolphinBar"
11 * 0079:1843 "DragonRise Inc. Mayflash GameCube Game Controller Adapter"
12 * 0079:1844 "DragonRise Inc. Mayflash GameCube Game Controller Adapter (v04)"
13 *
14 * The following adapters probably work too, but need to be tested:
15 * 0079:1800 "DragonRise Inc. Mayflash WIIU Game Controller Adapter"
16 *
17 * Copyright (c) 2016-2017 Marcel Hasler <mahasler@gmail.com>
18 */
19
20/*
21 */
22
23#include <linux/input.h>
24#include <linux/slab.h>
25#include <linux/hid.h>
26#include <linux/module.h>
27
28#include "hid-ids.h"
29
30struct mf_device {
31	struct hid_report *report;
32};
33
34static int mf_play(struct input_dev *dev, void *data, struct ff_effect *effect)
35{
36	struct hid_device *hid = input_get_drvdata(dev);
37	struct mf_device *mf = data;
38	int strong, weak;
39
40	strong = effect->u.rumble.strong_magnitude;
41	weak = effect->u.rumble.weak_magnitude;
42
43	dbg_hid("Called with 0x%04x 0x%04x.\n", strong, weak);
44
45	strong = strong * 0xff / 0xffff;
46	weak = weak * 0xff / 0xffff;
47
48	dbg_hid("Running with 0x%02x 0x%02x.\n", strong, weak);
49
50	mf->report->field[0]->value[0] = weak;
51	mf->report->field[0]->value[1] = strong;
52	hid_hw_request(hid, mf->report, HID_REQ_SET_REPORT);
53
54	return 0;
55}
56
57static int mf_init(struct hid_device *hid)
58{
59	struct mf_device *mf;
60
61	struct list_head *report_list =
62			&hid->report_enum[HID_OUTPUT_REPORT].report_list;
63
64	struct list_head *report_ptr;
65	struct hid_report *report;
66
67	struct list_head *input_ptr = &hid->inputs;
68	struct hid_input *input;
69
70	struct input_dev *dev;
71
72	int error;
73
74	/* Setup each of the four inputs */
75	list_for_each(report_ptr, report_list) {
76		report = list_entry(report_ptr, struct hid_report, list);
77
78		if (report->maxfield < 1 || report->field[0]->report_count < 2) {
79			hid_err(hid, "Invalid report, this should never happen!\n");
80			return -ENODEV;
81		}
82
83		if (list_is_last(input_ptr, &hid->inputs)) {
84			hid_err(hid, "Missing input, this should never happen!\n");
85			return -ENODEV;
86		}
87
88		input_ptr = input_ptr->next;
89		input = list_entry(input_ptr, struct hid_input, list);
90
91		mf = kzalloc(sizeof(struct mf_device), GFP_KERNEL);
92		if (!mf)
93			return -ENOMEM;
94
95		dev = input->input;
96		set_bit(FF_RUMBLE, dev->ffbit);
97
98		error = input_ff_create_memless(dev, mf, mf_play);
99		if (error) {
100			kfree(mf);
101			return error;
102		}
103
104		mf->report = report;
105		mf->report->field[0]->value[0] = 0x00;
106		mf->report->field[0]->value[1] = 0x00;
107		hid_hw_request(hid, mf->report, HID_REQ_SET_REPORT);
108	}
109
110	hid_info(hid, "Force feedback for HJZ Mayflash game controller "
111		      "adapters by Marcel Hasler <mahasler@gmail.com>\n");
112
113	return 0;
114}
115
116static int mf_probe(struct hid_device *hid, const struct hid_device_id *id)
117{
118	int error;
119
120	dev_dbg(&hid->dev, "Mayflash HID hardware probe...\n");
121
122	/* Apply quirks as needed */
123	hid->quirks |= id->driver_data;
124
125	error = hid_parse(hid);
126	if (error) {
127		hid_err(hid, "HID parse failed.\n");
128		return error;
129	}
130
131	error = hid_hw_start(hid, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
132	if (error) {
133		hid_err(hid, "HID hw start failed\n");
134		return error;
135	}
136
137	error = mf_init(hid);
138	if (error) {
139		hid_err(hid, "Force feedback init failed.\n");
140		hid_hw_stop(hid);
141		return error;
142	}
143
144	return 0;
145}
146
147static const struct hid_device_id mf_devices[] = {
148	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_PS3),
149		.driver_data = HID_QUIRK_MULTI_INPUT },
150	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_DOLPHINBAR),
151		.driver_data = HID_QUIRK_MULTI_INPUT },
152	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_GAMECUBE1),
153		.driver_data = HID_QUIRK_MULTI_INPUT },
154	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_GAMECUBE2),
155		.driver_data = 0 }, /* No quirk required */
156	{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_GAMECUBE3),
157		.driver_data = HID_QUIRK_MULTI_INPUT },
158	{ }
159};
160MODULE_DEVICE_TABLE(hid, mf_devices);
161
162static struct hid_driver mf_driver = {
163	.name = "hid_mf",
164	.id_table = mf_devices,
165	.probe = mf_probe,
166};
167module_hid_driver(mf_driver);
168
169MODULE_LICENSE("GPL");
170