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 error;
67 int i, j;
68
69 if (list_empty(&hid->inputs)) {
70 hid_err(hid, "no inputs found\n");
71 return -ENODEV;
72 }
73
74 hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
75 dev = hidinput->input;
76
77 if (list_empty(report_list)) {
78 hid_err(hid, "no output reports found\n");
79 return -ENODEV;
80 }
81
82 report = list_first_entry(report_list, struct hid_report, list);
83 /*
84 * Actually there are 4 fields for 4 Bytes as below:
85 * -----------------------------------------
86 * Byte0 Byte1 Byte2 Byte3
87 * 0x00 0x00 left_motor right_motor
88 * -----------------------------------------
89 * Do init them with default value.
90 */
91 if (report->maxfield < 4) {
92 hid_err(hid, "not enough fields in the report: %d\n",
93 report->maxfield);
94 return -ENODEV;
95 }
96 for (i = 0; i < report->maxfield; i++) {
97 if (report->field[i]->report_count < 1) {
98 hid_err(hid, "no values in the field\n");
99 return -ENODEV;
100 }
101 for (j = 0; j < report->field[i]->report_count; j++) {
102 report->field[i]->value[j] = 0x00;
103 }
104 }
105
106 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
107 if (!betopff)
108 return -ENOMEM;
109
110 set_bit(FF_RUMBLE, dev->ffbit);
111
112 error = input_ff_create_memless(dev, betopff, hid_betopff_play);
113 if (error) {
114 kfree(betopff);
115 return error;
116 }
117
118 betopff->report = report;
119 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
120
121 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
122
123 return 0;
124 }
125
betop_probe(struct hid_device * hdev,const struct hid_device_id * id)126 static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
127 {
128 int ret;
129
130 if (id->driver_data)
131 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
132
133 ret = hid_parse(hdev);
134 if (ret) {
135 hid_err(hdev, "parse failed\n");
136 goto err;
137 }
138
139 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
140 if (ret) {
141 hid_err(hdev, "hw start failed\n");
142 goto err;
143 }
144
145 betopff_init(hdev);
146
147 return 0;
148 err:
149 return ret;
150 }
151
152 static const struct hid_device_id betop_devices[] = {
153 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
154 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
155 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
156 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
157 { }
158 };
159 MODULE_DEVICE_TABLE(hid, betop_devices);
160
161 static struct hid_driver betop_driver = {
162 .name = "betop",
163 .id_table = betop_devices,
164 .probe = betop_probe,
165 };
166 module_hid_driver(betop_driver);
167
168 MODULE_LICENSE("GPL");
169