1 /*
2 * Force feedback support for Betop based devices
3 *
4 * The devices are distributed under various names and the same USB device ID
5 * can be used in both adapters and actual game controllers.
6 *
7 * 0x11c2:0x2208 "BTP2185 BFM mode Joystick"
8 * - tested with BTP2185 BFM Mode.
9 *
10 * 0x11C0:0x5506 "BTP2185 PC mode Joystick"
11 * - tested with BTP2185 PC Mode.
12 *
13 * 0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad"
14 * - tested with BTP2185 PC Mode with another version.
15 *
16 * 0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick"
17 * - tested with BTP2171s.
18 * Copyright (c) 2014 Huang Bo <huangbobupt@163.com>
19 */
20
21 /*
22 * This program is free software; you can redistribute it and/or modify it
23 * under the terms of the GNU General Public License as published by the Free
24 * Software Foundation; either version 2 of the License, or (at your option)
25 * any later version.
26 */
27
28
29 #include <linux/input.h>
30 #include <linux/slab.h>
31 #include <linux/module.h>
32 #include <linux/hid.h>
33
34 #include "hid-ids.h"
35
36 struct betopff_device {
37 struct hid_report *report;
38 };
39
hid_betopff_play(struct input_dev * dev,void * data,struct ff_effect * effect)40 static int hid_betopff_play(struct input_dev *dev, void *data,
41 struct ff_effect *effect)
42 {
43 struct hid_device *hid = input_get_drvdata(dev);
44 struct betopff_device *betopff = data;
45 __u16 left, right;
46
47 left = effect->u.rumble.strong_magnitude;
48 right = effect->u.rumble.weak_magnitude;
49
50 betopff->report->field[2]->value[0] = left / 256;
51 betopff->report->field[3]->value[0] = right / 256;
52
53 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
54
55 return 0;
56 }
57
betopff_init(struct hid_device * hid)58 static int betopff_init(struct hid_device *hid)
59 {
60 struct betopff_device *betopff;
61 struct hid_report *report;
62 struct hid_input *hidinput;
63 struct list_head *report_list =
64 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
65 struct input_dev *dev;
66 int field_count = 0;
67 int error;
68 int i, j;
69
70 if (list_empty(&hid->inputs)) {
71 hid_err(hid, "no inputs found\n");
72 return -ENODEV;
73 }
74
75 hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
76 dev = hidinput->input;
77
78 if (list_empty(report_list)) {
79 hid_err(hid, "no output reports found\n");
80 return -ENODEV;
81 }
82
83 report = list_first_entry(report_list, struct hid_report, list);
84 /*
85 * Actually there are 4 fields for 4 Bytes as below:
86 * -----------------------------------------
87 * Byte0 Byte1 Byte2 Byte3
88 * 0x00 0x00 left_motor right_motor
89 * -----------------------------------------
90 * Do init them with default value.
91 */
92 for (i = 0; i < report->maxfield; i++) {
93 for (j = 0; j < report->field[i]->report_count; j++) {
94 report->field[i]->value[j] = 0x00;
95 field_count++;
96 }
97 }
98
99 if (field_count < 4) {
100 hid_err(hid, "not enough fields in the report: %d\n",
101 field_count);
102 return -ENODEV;
103 }
104
105 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
106 if (!betopff)
107 return -ENOMEM;
108
109 set_bit(FF_RUMBLE, dev->ffbit);
110
111 error = input_ff_create_memless(dev, betopff, hid_betopff_play);
112 if (error) {
113 kfree(betopff);
114 return error;
115 }
116
117 betopff->report = report;
118 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
119
120 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
121
122 return 0;
123 }
124
betop_probe(struct hid_device * hdev,const struct hid_device_id * id)125 static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
126 {
127 int ret;
128
129 if (id->driver_data)
130 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
131
132 ret = hid_parse(hdev);
133 if (ret) {
134 hid_err(hdev, "parse failed\n");
135 goto err;
136 }
137
138 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
139 if (ret) {
140 hid_err(hdev, "hw start failed\n");
141 goto err;
142 }
143
144 betopff_init(hdev);
145
146 return 0;
147 err:
148 return ret;
149 }
150
151 static const struct hid_device_id betop_devices[] = {
152 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
153 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
154 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
155 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
156 { }
157 };
158 MODULE_DEVICE_TABLE(hid, betop_devices);
159
160 static struct hid_driver betop_driver = {
161 .name = "betop",
162 .id_table = betop_devices,
163 .probe = betop_probe,
164 };
165 module_hid_driver(betop_driver);
166
167 MODULE_LICENSE("GPL");
168