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
36struct betopff_device {
37 struct hid_report *report;
38};
39
40static 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
58static int betopff_init(struct hid_device *hid)
59{
60 struct betopff_device *betopff;
61 struct hid_report *report;
62 struct hid_input *hidinput =
63 list_first_entry(&hid->inputs, struct hid_input, list);
64 struct list_head *report_list =
65 &hid->report_enum[HID_OUTPUT_REPORT].report_list;
66 struct input_dev *dev = hidinput->input;
67 int field_count = 0;
68 int error;
69 int i, j;
70
71 if (list_empty(report_list)) {
72 hid_err(hid, "no output reports found\n");
73 return -ENODEV;
74 }
75
76 report = list_first_entry(report_list, struct hid_report, list);
77 /*
78 * Actually there are 4 fields for 4 Bytes as below:
79 * -----------------------------------------
80 * Byte0 Byte1 Byte2 Byte3
81 * 0x00 0x00 left_motor right_motor
82 * -----------------------------------------
83 * Do init them with default value.
84 */
85 for (i = 0; i < report->maxfield; i++) {
86 for (j = 0; j < report->field[i]->report_count; j++) {
87 report->field[i]->value[j] = 0x00;
88 field_count++;
89 }
90 }
91
92 if (field_count < 4) {
93 hid_err(hid, "not enough fields in the report: %d\n",
94 field_count);
95 return -ENODEV;
96 }
97
98 betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
99 if (!betopff)
100 return -ENOMEM;
101
102 set_bit(FF_RUMBLE, dev->ffbit);
103
104 error = input_ff_create_memless(dev, betopff, hid_betopff_play);
105 if (error) {
106 kfree(betopff);
107 return error;
108 }
109
110 betopff->report = report;
111 hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
112
113 hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
114
115 return 0;
116}
117
118static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
119{
120 int ret;
121
122 if (id->driver_data)
123 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
124
125 ret = hid_parse(hdev);
126 if (ret) {
127 hid_err(hdev, "parse failed\n");
128 goto err;
129 }
130
131 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
132 if (ret) {
133 hid_err(hdev, "hw start failed\n");
134 goto err;
135 }
136
137 betopff_init(hdev);
138
139 return 0;
140err:
141 return ret;
142}
143
144static const struct hid_device_id betop_devices[] = {
145 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
146 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
147 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
148 { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
149 { }
150};
151MODULE_DEVICE_TABLE(hid, betop_devices);
152
153static struct hid_driver betop_driver = {
154 .name = "betop",
155 .id_table = betop_devices,
156 .probe = betop_probe,
157};
158module_hid_driver(betop_driver);
159
160MODULE_LICENSE("GPL");
161