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
33 struct betopff_device {
34 struct hid_report *report;
35 };
36
hid_betopff_play(struct input_dev * dev,void * data,struct ff_effect * effect)37 static 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
betopff_init(struct hid_device * hid)55 static 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 error;
64 int i, j;
65
66 if (list_empty(&hid->inputs)) {
67 hid_err(hid, "no inputs found\n");
68 return -ENODEV;
69 }
70
71 hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
72 dev = hidinput->input;
73
74 if (list_empty(report_list)) {
75 hid_err(hid, "no output reports found\n");
76 return -ENODEV;
77 }
78
79 report = list_first_entry(report_list, struct hid_report, list);
80 /*
81 * Actually there are 4 fields for 4 Bytes as below:
82 * -----------------------------------------
83 * Byte0 Byte1 Byte2 Byte3
84 * 0x00 0x00 left_motor right_motor
85 * -----------------------------------------
86 * Do init them with default value.
87 */
88 if (report->maxfield < 4) {
89 hid_err(hid, "not enough fields in the report: %d\n",
90 report->maxfield);
91 return -ENODEV;
92 }
93 for (i = 0; i < report->maxfield; i++) {
94 if (report->field[i]->report_count < 1) {
95 hid_err(hid, "no values in the field\n");
96 return -ENODEV;
97 }
98 for (j = 0; j < report->field[i]->report_count; j++) {
99 report->field[i]->value[j] = 0x00;
100 }
101 }
102
103 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
104 if (!betopff)
105 return -ENOMEM;
106
107 set_bit(FF_RUMBLE, dev->ffbit);
108
109 error = input_ff_create_memless(dev, betopff, hid_betopff_play);
110 if (error) {
111 kfree(betopff);
112 return error;
113 }
114
115 betopff->report = report;
116 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
117
118 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
119
120 return 0;
121 }
122
betop_probe(struct hid_device * hdev,const struct hid_device_id * id)123 static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
124 {
125 int ret;
126
127 if (id->driver_data)
128 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
129
130 ret = hid_parse(hdev);
131 if (ret) {
132 hid_err(hdev, "parse failed\n");
133 goto err;
134 }
135
136 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
137 if (ret) {
138 hid_err(hdev, "hw start failed\n");
139 goto err;
140 }
141
142 betopff_init(hdev);
143
144 return 0;
145 err:
146 return ret;
147 }
148
149 static const struct hid_device_id betop_devices[] = {
150 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
151 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
152 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
153 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
154 { }
155 };
156 MODULE_DEVICE_TABLE(hid, betop_devices);
157
158 static struct hid_driver betop_driver = {
159 .name = "betop",
160 .id_table = betop_devices,
161 .probe = betop_probe,
162 };
163 module_hid_driver(betop_driver);
164
165 MODULE_LICENSE("GPL");
166